Signed-off-by: Charles Manning cdhmanning@gmail.com --- fs/yaffs2/Makefile | 48 - fs/yaffs2/README-linux | 201 -- fs/yaffs2/devextras.h | 275 -- fs/yaffs2/yaffs_checkptrw.c | 405 --- fs/yaffs2/yaffs_checkptrw.h | 34 - fs/yaffs2/yaffs_ecc.c | 333 -- fs/yaffs2/yaffs_ecc.h | 44 - fs/yaffs2/yaffs_flashif.h | 31 - fs/yaffs2/yaffs_guts.c | 7329 ---------------------------------------- fs/yaffs2/yaffs_guts.h | 908 ----- fs/yaffs2/yaffs_malloc.h | 25 - fs/yaffs2/yaffs_mtdif.c | 246 -- fs/yaffs2/yaffs_mtdif.h | 27 - fs/yaffs2/yaffs_mtdif2.c | 235 -- fs/yaffs2/yaffs_mtdif2.h | 29 - fs/yaffs2/yaffs_nand.c | 134 - fs/yaffs2/yaffs_nand.h | 43 - fs/yaffs2/yaffs_nandemul2k.h | 39 - fs/yaffs2/yaffs_packedtags1.c | 55 - fs/yaffs2/yaffs_packedtags1.h | 37 - fs/yaffs2/yaffs_packedtags2.c | 185 - fs/yaffs2/yaffs_packedtags2.h | 38 - fs/yaffs2/yaffs_qsort.c | 163 - fs/yaffs2/yaffs_qsort.h | 23 - fs/yaffs2/yaffs_ramdisk.h | 32 - fs/yaffs2/yaffs_tagscompat.c | 532 --- fs/yaffs2/yaffs_tagscompat.h | 40 - fs/yaffs2/yaffs_tagsvalidity.c | 31 - fs/yaffs2/yaffs_tagsvalidity.h | 24 - fs/yaffs2/yaffscfg.c | 420 --- fs/yaffs2/yaffscfg.h | 45 - fs/yaffs2/yaffsfs.c | 1510 --------- fs/yaffs2/yaffsfs.h | 231 -- fs/yaffs2/yaffsinterface.h | 21 - fs/yaffs2/ydirectenv.h | 92 - fs/yaffs2/yportenv.h | 193 -- 36 files changed, 0 insertions(+), 14058 deletions(-) delete mode 100644 fs/yaffs2/Makefile delete mode 100644 fs/yaffs2/README-linux delete mode 100644 fs/yaffs2/devextras.h delete mode 100644 fs/yaffs2/yaffs_checkptrw.c delete mode 100644 fs/yaffs2/yaffs_checkptrw.h delete mode 100644 fs/yaffs2/yaffs_ecc.c delete mode 100644 fs/yaffs2/yaffs_ecc.h delete mode 100644 fs/yaffs2/yaffs_flashif.h delete mode 100644 fs/yaffs2/yaffs_guts.c delete mode 100644 fs/yaffs2/yaffs_guts.h delete mode 100644 fs/yaffs2/yaffs_malloc.h delete mode 100644 fs/yaffs2/yaffs_mtdif.c delete mode 100644 fs/yaffs2/yaffs_mtdif.h delete mode 100644 fs/yaffs2/yaffs_mtdif2.c delete mode 100644 fs/yaffs2/yaffs_mtdif2.h delete mode 100644 fs/yaffs2/yaffs_nand.c delete mode 100644 fs/yaffs2/yaffs_nand.h delete mode 100644 fs/yaffs2/yaffs_nandemul2k.h delete mode 100644 fs/yaffs2/yaffs_packedtags1.c delete mode 100644 fs/yaffs2/yaffs_packedtags1.h delete mode 100644 fs/yaffs2/yaffs_packedtags2.c delete mode 100644 fs/yaffs2/yaffs_packedtags2.h delete mode 100644 fs/yaffs2/yaffs_qsort.c delete mode 100644 fs/yaffs2/yaffs_qsort.h delete mode 100644 fs/yaffs2/yaffs_ramdisk.h delete mode 100644 fs/yaffs2/yaffs_tagscompat.c delete mode 100644 fs/yaffs2/yaffs_tagscompat.h delete mode 100644 fs/yaffs2/yaffs_tagsvalidity.c delete mode 100644 fs/yaffs2/yaffs_tagsvalidity.h delete mode 100644 fs/yaffs2/yaffscfg.c delete mode 100644 fs/yaffs2/yaffscfg.h delete mode 100644 fs/yaffs2/yaffsfs.c delete mode 100644 fs/yaffs2/yaffsfs.h delete mode 100644 fs/yaffs2/yaffsinterface.h delete mode 100644 fs/yaffs2/ydirectenv.h delete mode 100644 fs/yaffs2/yportenv.h
diff --git a/fs/yaffs2/Makefile b/fs/yaffs2/Makefile deleted file mode 100644 index 904d646..0000000 --- a/fs/yaffs2/Makefile +++ /dev/null @@ -1,48 +0,0 @@ -# Makefile for YAFFS direct test -# -# -# YAFFS: Yet another Flash File System. A NAND-flash specific file system. -# -# Copyright (C) 2003 Aleph One Ltd. -# -# -# Created by Charles Manning charles@aleph1.co.uk -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License version 2 as -# published by the Free Software Foundation. -# -# NB Warning this Makefile does not include header dependencies. -# -# $Id: Makefile,v 1.15 2007/07/18 19:40:38 charles Exp $ - -#EXTRA_COMPILE_FLAGS = -DYAFFS_IGNORE_TAGS_ECC -include $(TOPDIR)/config.mk - -LIB = $(obj)libyaffs2.o - -COBJS-$(CONFIG_YAFFS2) := \ - yaffscfg.o yaffs_ecc.o yaffsfs.o yaffs_guts.o yaffs_packedtags1.o \ - yaffs_tagscompat.o yaffs_packedtags2.o yaffs_tagsvalidity.o \ - yaffs_nand.o yaffs_checkptrw.o yaffs_qsort.o yaffs_mtdif.o \ - yaffs_mtdif2.o - -SRCS := $(COBJS-y:.o=.c) -OBJS := $(addprefix $(obj),$(COBJS-y)) - -# -DCONFIG_YAFFS_NO_YAFFS1 -CFLAGS += -DCONFIG_YAFFS_DIRECT -DCONFIG_YAFFS_SHORT_NAMES_IN_RAM -DCONFIG_YAFFS_YAFFS2 -DLINUX_VERSION_CODE=0x20622 - -all: $(LIB) - -$(LIB): $(obj).depend $(OBJS) - $(call cmd_link_o_target, $(OBJS)) - -######################################################################### - -# defines $(obj).depend target -include $(SRCTREE)/rules.mk - -sinclude $(obj).depend - -######################################################################### diff --git a/fs/yaffs2/README-linux b/fs/yaffs2/README-linux deleted file mode 100644 index 3851e36..0000000 --- a/fs/yaffs2/README-linux +++ /dev/null @@ -1,201 +0,0 @@ -Welcome to YAFFS, the first file system developed specifically for NAND flash. - -It is now YAFFS2 - original YAFFS (AYFFS1) only supports 512-byte page -NAND and is now deprectated. YAFFS2 supports 512b page in 'YAFFS1 -compatibility' mode (CONFIG_YAFFS_YAFFS1) and 2K or larger page NAND -in YAFFS2 mode (CONFIG_YAFFS_YAFFS2). - - -A note on licencing -------------------- -YAFFS is available under the GPL and via alternative licensing -arrangements with Aleph One. If you're using YAFFS as a Linux kernel -file system then it will be under the GPL. For use in other situations -you should discuss licensing issues with Aleph One. - - -Terminology ------------ -Page - NAND addressable unit (normally 512b or 2Kbyte size) - can - be read, written, marked bad. Has associated OOB. -Block - Eraseable unit. 64 Pages. (128K on 2K NAND, 32K on 512b NAND) -OOB - 'spare area' of each page for ECC, bad block marked and YAFFS - tags. 16 bytes per 512b - 64 bytes for 2K page size. -Chunk - Basic YAFFS addressable unit. Same size as Page. -Object - YAFFS Object: File, Directory, Link, Device etc. - -YAFFS design ------------- - -YAFFS is a log-structured filesystem. It is designed particularly for -NAND (as opposed to NOR) flash, to be flash-friendly, robust due to -journalling, and to have low RAM and boot time overheads. File data is -stored in 'chunks'. Chunks are the same size as NAND pages. Each page -is marked with file id and chunk number. These marking 'tags' are -stored in the OOB (or 'spare') region of the flash. The chunk number -is determined by dividing the file position by the chunk size. Each -chunk has a number of valid bytes, which equals the page size for all -except the last chunk in a file. - -File 'headers' are stored as the first page in a file, marked as a -different type to data pages. The same mechanism is used to store -directories, device files, links etc. The first page describes which -type of object it is. - -YAFFS2 never re-writes a page, because the spec of NAND chips does not -allow it. (YAFFS1 used to mark a block 'deleted' in the OOB). Deletion -is managed by moving deleted objects to the special, hidden 'unlinked' -directory. These records are preserved until all the pages containing -the object have been erased (We know when this happen by keeping a -count of chunks remaining on the system for each object - when it -reaches zero the object really is gone). - -When data in a file is overwritten, the relevant chunks are replaced -by writing new pages to flash containing the new data but the same -tags. - -Pages are also marked with a short (2 bit) serial number that -increments each time the page at this position is incremented. The -reason for this is that if power loss/crash/other act of demonic -forces happens before the replaced page is marked as discarded, it is -possible to have two pages with the same tags. The serial number is -used to arbitrate. - -A block containing only discarded pages (termed a dirty block) is an -obvious candidate for garbage collection. Otherwise valid pages can be -copied off a block thus rendering the whole block discarded and ready -for garbage collection. - -In theory you don't need to hold the file structure in RAM... you -could just scan the whole flash looking for pages when you need them. -In practice though you'd want better file access times than that! The -mechanism proposed here is to have a list of __u16 page addresses -associated with each file. Since there are 2^18 pages in a 128MB NAND, -a __u16 is insufficient to uniquely identify a page but is does -identify a group of 4 pages - a small enough region to search -exhaustively. This mechanism is clearly expandable to larger NAND -devices - within reason. The RAM overhead with this approach is approx -2 bytes per page - 512kB of RAM for a whole 128MB NAND. - -Boot-time scanning to build the file structure lists only requires -one pass reading NAND. If proper shutdowns happen the current RAM -summary of the filesystem status is saved to flash, called -'checkpointing'. This saves re-scanning the flash on startup, and gives -huge boot/mount time savings. - -YAFFS regenerates its state by 'replaying the tape' - i.e. by -scanning the chunks in their allocation order (i.e. block sequence ID -order), which is usually different form the media block order. Each -block is still only read once - starting from the end of the media and -working back. - -YAFFS tags in YAFFS1 mode: - -18-bit Object ID (2^18 files, i.e. > 260,000 files). File id 0- is not - valid and indicates a deleted page. File od 0x3ffff is also not valid. - Synonymous with inode. -2-bit serial number -20-bit Chunk ID within file. Limit of 2^20 chunks/pages per file (i.e. - > 500MB max file size). Chunk ID 0 is the file header for the file. -10-bit counter of the number of bytes used in the page. -12 bit ECC on tags - -YAFFS tags in YAFFS2 mode: - 4 bytes 32-bit chunk ID - 4 bytes 32-bit object ID - 2 bytes Number of data bytes in this chunk - 4 bytes Sequence number for this block - 3 bytes ECC on tags - 12 bytes ECC on data (3 bytes per 256 bytes of data) - - -Page allocation and garbage collection - -Pages are allocated sequentially from the currently selected block. -When all the pages in the block are filled, another clean block is -selected for allocation. At least two or three clean blocks are -reserved for garbage collection purposes. If there are insufficient -clean blocks available, then a dirty block ( ie one containing only -discarded pages) is erased to free it up as a clean block. If no dirty -blocks are available, then the dirtiest block is selected for garbage -collection. - -Garbage collection is performed by copying the valid data pages into -new data pages thus rendering all the pages in this block dirty and -freeing it up for erasure. I also like the idea of selecting a block -at random some small percentage of the time - thus reducing the chance -of wear differences. - -YAFFS is single-threaded. Garbage-collection is done as a parasitic -task of writing data. So each time some data is written, a bit of -pending garbage collection is done. More pages are garbage-collected -when free space is tight. - - -Flash writing - -YAFFS only ever writes each page once, complying with the requirements -of the most restricitve NAND devices. - -Wear levelling - -This comes as a side-effect of the block-allocation strategy. Data is -always written on the next free block, so they are all used equally. -Blocks containing data that is written but never erased will not get -back into the free list, so wear is levelled over only blocks which -are free or become free, not blocks which never change. - - - -Some helpful info ------------------ - -Formatting a YAFFS device is simply done by erasing it. - -Making an initial filesystem can be tricky because YAFFS uses the OOB -and thus the bytes that get written depend on the YAFFS data (tags), -and the ECC bytes and bad block markers which are dictated by the -hardware and/or the MTD subsystem. The data layout also depends on the -device page size (512b or 2K). Because YAFFS is only responsible for -some of the OOB data, generating a filesystem offline requires -detailed knowledge of what the other parts (MTD and NAND -driver/hardware) are going to do. - -To make a YAFFS filesystem you have 3 options: - -1) Boot the system with an empty NAND device mounted as YAFFS and copy - stuff on. - -2) Make a filesystem image offline, then boot the system and use - MTDutils to write an image to flash. - -3) Make a filesystem image offline and use some tool like a bootloader to - write it to flash. - -Option 1 avoids a lot of issues because all the parts -(YAFFS/MTD/hardware) all take care of their own bits and (if you have -put things together properly) it will 'just work'. YAFFS just needs to -know how many bytes of the OOB it can use. However sometimes it is not -practical. - -Option 2 lets MTD/hardware take care of the ECC so the filesystem -image just had to know which bytes to use for YAFFS Tags. - -Option 3 is hardest as the image creator needs to know exactly what -ECC bytes, endianness and algorithm to use as well as which bytes are -available to YAFFS. - -mkyaffs2image creates an image suitable for option 3 for the -particular case of yaffs2 on 2K page NAND with default MTD layout. - -mkyaffsimage creates an equivalent image for 512b page NAND (i.e. -yaffs1 format). - -Bootloaders ------------ - -A bootloader using YAFFS needs to know how MTD is laying out the OOB -so that it can skip bad blocks. - -YAFFS Tracing -------------- diff --git a/fs/yaffs2/devextras.h b/fs/yaffs2/devextras.h deleted file mode 100644 index f6e5361..0000000 --- a/fs/yaffs2/devextras.h +++ /dev/null @@ -1,275 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * This file is just holds extra declarations used during development. - * Most of these are from kernel includes placed here so we can use them in - * applications. - * - */ - -#ifndef __EXTRAS_H__ -#define __EXTRAS_H__ - -#if defined WIN32 -#define __inline__ __inline -#define new newHack -#endif - -/* XXX U-BOOT XXX */ -#if 1 /* !(defined __KERNEL__) || (defined WIN32) */ - -/* User space defines */ - -/* XXX U-BOOT XXX */ -#if 0 -typedef unsigned char __u8; -typedef unsigned short __u16; -typedef unsigned __u32; -#endif - -#include <asm/types.h> - -/* - * Simple doubly linked list implementation. - * - * Some of the internal functions ("__xxx") are useful when - * manipulating whole lists rather than single entries, as - * sometimes we already know the next/prev entries and we can - * generate better code by using them directly rather than - * using the generic single-entry routines. - */ - -#define prefetch(x) 1 - -struct list_head { - struct list_head *next, *prev; -}; - -#define LIST_HEAD_INIT(name) { &(name), &(name) } - -#define LIST_HEAD(name) \ - struct list_head name = LIST_HEAD_INIT(name) - -#define INIT_LIST_HEAD(ptr) do { \ - (ptr)->next = (ptr); (ptr)->prev = (ptr); \ -} while (0) - -/* - * Insert a new entry between two known consecutive entries. - * - * This is only for internal list manipulation where we know - * the prev/next entries already! - */ -static __inline__ void __list_add(struct list_head *new, - struct list_head *prev, - struct list_head *next) -{ - next->prev = new; - new->next = next; - new->prev = prev; - prev->next = new; -} - -/** - * list_add - add a new entry - * @new: new entry to be added - * @head: list head to add it after - * - * Insert a new entry after the specified head. - * This is good for implementing stacks. - */ -static __inline__ void list_add(struct list_head *new, struct list_head *head) -{ - __list_add(new, head, head->next); -} - -/** - * list_add_tail - add a new entry - * @new: new entry to be added - * @head: list head to add it before - * - * Insert a new entry before the specified head. - * This is useful for implementing queues. - */ -static __inline__ void list_add_tail(struct list_head *new, - struct list_head *head) -{ - __list_add(new, head->prev, head); -} - -/* - * Delete a list entry by making the prev/next entries - * point to each other. - * - * This is only for internal list manipulation where we know - * the prev/next entries already! - */ -static __inline__ void __list_del(struct list_head *prev, - struct list_head *next) -{ - next->prev = prev; - prev->next = next; -} - -/** - * list_del - deletes entry from list. - * @entry: the element to delete from the list. - * Note: list_empty on entry does not return true after this, the entry is - * in an undefined state. - */ -static __inline__ void list_del(struct list_head *entry) -{ - __list_del(entry->prev, entry->next); -} - -/** - * list_del_init - deletes entry from list and reinitialize it. - * @entry: the element to delete from the list. - */ -static __inline__ void list_del_init(struct list_head *entry) -{ - __list_del(entry->prev, entry->next); - INIT_LIST_HEAD(entry); -} - -/** - * list_empty - tests whether a list is empty - * @head: the list to test. - */ -static __inline__ int list_empty(struct list_head *head) -{ - return head->next == head; -} - -/** - * list_splice - join two lists - * @list: the new list to add. - * @head: the place to add it in the first list. - */ -static __inline__ void list_splice(struct list_head *list, - struct list_head *head) -{ - struct list_head *first = list->next; - - if (first != list) { - struct list_head *last = list->prev; - struct list_head *at = head->next; - - first->prev = head; - head->next = first; - - last->next = at; - at->prev = last; - } -} - -/** - * list_entry - get the struct for this entry - * @ptr: the &struct list_head pointer. - * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. - */ -#define list_entry(ptr, type, member) \ - ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member))) - -/** - * list_for_each - iterate over a list - * @pos: the &struct list_head to use as a loop counter. - * @head: the head for your list. - */ -#define list_for_each(pos, head) \ - for (pos = (head)->next, prefetch(pos->next); pos != (head); \ - pos = pos->next, prefetch(pos->next)) - -/** - * list_for_each_safe - iterate over a list safe against removal - * of list entry - * @pos: the &struct list_head to use as a loop counter. - * @n: another &struct list_head to use as temporary storage - * @head: the head for your list. - */ -#define list_for_each_safe(pos, n, head) \ - for (pos = (head)->next, n = pos->next; pos != (head); \ - pos = n, n = pos->next) - -/* - * File types - */ -#define DT_UNKNOWN 0 -#define DT_FIFO 1 -#define DT_CHR 2 -#define DT_DIR 4 -#define DT_BLK 6 -#define DT_REG 8 -#define DT_LNK 10 -#define DT_SOCK 12 -#define DT_WHT 14 - -#ifndef WIN32 -/* XXX U-BOOT XXX */ -#if 0 -#include <sys/stat.h> -#else -#include "common.h" -#endif -#endif - -/* - * Attribute flags. These should be or-ed together to figure out what - * has been changed! - */ -#define ATTR_MODE 1 -#define ATTR_UID 2 -#define ATTR_GID 4 -#define ATTR_SIZE 8 -#define ATTR_ATIME 16 -#define ATTR_MTIME 32 -#define ATTR_CTIME 64 -#define ATTR_ATIME_SET 128 -#define ATTR_MTIME_SET 256 -#define ATTR_FORCE 512 /* Not a change, but a change it */ -#define ATTR_ATTR_FLAG 1024 - -struct iattr { - unsigned int ia_valid; - unsigned ia_mode; - unsigned ia_uid; - unsigned ia_gid; - unsigned ia_size; - unsigned ia_atime; - unsigned ia_mtime; - unsigned ia_ctime; - unsigned int ia_attr_flags; -}; - -#define KERN_DEBUG - -#else - -#ifndef WIN32 -#include <linux/types.h> -#include <linux/list.h> -#include <linux/fs.h> -#include <linux/stat.h> -#endif - -#endif - -#if defined WIN32 -#undef new -#endif - -#endif diff --git a/fs/yaffs2/yaffs_checkptrw.c b/fs/yaffs2/yaffs_checkptrw.c deleted file mode 100644 index 230f78f..0000000 --- a/fs/yaffs2/yaffs_checkptrw.c +++ /dev/null @@ -1,405 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> -#include <malloc.h> - -const char *yaffs_checkptrw_c_version = - "$Id: yaffs_checkptrw.c,v 1.14 2007/05/15 20:07:40 charles Exp $"; - - -#include "yaffs_checkptrw.h" - - -static int yaffs_CheckpointSpaceOk(yaffs_Device *dev) -{ - - int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks; - - T(YAFFS_TRACE_CHECKPOINT, - (TSTR("checkpt blocks available = %d" TENDSTR), - blocksAvailable)); - - - return (blocksAvailable <= 0) ? 0 : 1; -} - - -static int yaffs_CheckpointErase(yaffs_Device *dev) -{ - - int i; - - - if(!dev->eraseBlockInNAND) - return 0; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("checking blocks %d to %d"TENDSTR), - dev->internalStartBlock,dev->internalEndBlock)); - - for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); - if(bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("erasing checkpt block %d"TENDSTR),i)); - if(dev->eraseBlockInNAND(dev,i- dev->blockOffset /* realign */)){ - bi->blockState = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - dev->nFreeChunks += dev->nChunksPerBlock; - } - else { - dev->markNANDBlockBad(dev,i); - bi->blockState = YAFFS_BLOCK_STATE_DEAD; - } - } - } - - dev->blocksInCheckpoint = 0; - - return 1; -} - - -static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev) -{ - int i; - int blocksAvailable = dev->nErasedBlocks - dev->nReservedBlocks; - T(YAFFS_TRACE_CHECKPOINT, - (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR), - dev->nErasedBlocks,dev->nReservedBlocks,blocksAvailable,dev->checkpointNextBlock)); - - if(dev->checkpointNextBlock >= 0 && - dev->checkpointNextBlock <= dev->internalEndBlock && - blocksAvailable > 0){ - - for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); - if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY){ - dev->checkpointNextBlock = i + 1; - dev->checkpointCurrentBlock = i; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("allocating checkpt block %d"TENDSTR),i)); - return; - } - } - } - T(YAFFS_TRACE_CHECKPOINT,(TSTR("out of checkpt blocks"TENDSTR))); - - dev->checkpointNextBlock = -1; - dev->checkpointCurrentBlock = -1; -} - -static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev) -{ - int i; - yaffs_ExtendedTags tags; - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR), - dev->blocksInCheckpoint, dev->checkpointNextBlock)); - - if(dev->blocksInCheckpoint < dev->checkpointMaxBlocks) - for(i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++){ - int chunk = i * dev->nChunksPerBlock; - int realignedChunk = chunk - dev->chunkOffset; - - dev->readChunkWithTagsFromNAND(dev,realignedChunk,NULL,&tags); - T(YAFFS_TRACE_CHECKPOINT,(TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR), - i, tags.objectId,tags.sequenceNumber,tags.eccResult)); - - if(tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA){ - /* Right kind of block */ - dev->checkpointNextBlock = tags.objectId; - dev->checkpointCurrentBlock = i; - dev->checkpointBlockList[dev->blocksInCheckpoint] = i; - dev->blocksInCheckpoint++; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("found checkpt block %d"TENDSTR),i)); - return; - } - } - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("found no more checkpt blocks"TENDSTR))); - - dev->checkpointNextBlock = -1; - dev->checkpointCurrentBlock = -1; -} - - -int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting) -{ - - /* Got the functions we need? */ - if (!dev->writeChunkWithTagsToNAND || - !dev->readChunkWithTagsFromNAND || - !dev->eraseBlockInNAND || - !dev->markNANDBlockBad) - return 0; - - if(forWriting && !yaffs_CheckpointSpaceOk(dev)) - return 0; - - if(!dev->checkpointBuffer) - dev->checkpointBuffer = YMALLOC_DMA(dev->nDataBytesPerChunk); - if(!dev->checkpointBuffer) - return 0; - - - dev->checkpointPageSequence = 0; - - dev->checkpointOpenForWrite = forWriting; - - dev->checkpointByteCount = 0; - dev->checkpointSum = 0; - dev->checkpointXor = 0; - dev->checkpointCurrentBlock = -1; - dev->checkpointCurrentChunk = -1; - dev->checkpointNextBlock = dev->internalStartBlock; - - /* Erase all the blocks in the checkpoint area */ - if(forWriting){ - memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk); - dev->checkpointByteOffset = 0; - return yaffs_CheckpointErase(dev); - - - } else { - int i; - /* Set to a value that will kick off a read */ - dev->checkpointByteOffset = dev->nDataBytesPerChunk; - /* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully) - * going to be way more than we need */ - dev->blocksInCheckpoint = 0; - dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2; - dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks); - for(i = 0; i < dev->checkpointMaxBlocks; i++) - dev->checkpointBlockList[i] = -1; - } - - return 1; -} - -int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum) -{ - __u32 compositeSum; - compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF); - *sum = compositeSum; - return 1; -} - -static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev) -{ - - int chunk; - int realignedChunk; - - yaffs_ExtendedTags tags; - - if(dev->checkpointCurrentBlock < 0){ - yaffs_CheckpointFindNextErasedBlock(dev); - dev->checkpointCurrentChunk = 0; - } - - if(dev->checkpointCurrentBlock < 0) - return 0; - - tags.chunkDeleted = 0; - tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */ - tags.chunkId = dev->checkpointPageSequence + 1; - tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA; - tags.byteCount = dev->nDataBytesPerChunk; - if(dev->checkpointCurrentChunk == 0){ - /* First chunk we write for the block? Set block state to - checkpoint */ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointCurrentBlock); - bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; - dev->blocksInCheckpoint++; - } - - chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + dev->checkpointCurrentChunk; - - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR), - chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk,tags.objectId,tags.chunkId)); - - realignedChunk = chunk - dev->chunkOffset; - - dev->writeChunkWithTagsToNAND(dev,realignedChunk,dev->checkpointBuffer,&tags); - dev->checkpointByteOffset = 0; - dev->checkpointPageSequence++; - dev->checkpointCurrentChunk++; - if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock){ - dev->checkpointCurrentChunk = 0; - dev->checkpointCurrentBlock = -1; - } - memset(dev->checkpointBuffer,0,dev->nDataBytesPerChunk); - - return 1; -} - - -int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes) -{ - int i=0; - int ok = 1; - - - __u8 * dataBytes = (__u8 *)data; - - - - if(!dev->checkpointBuffer) - return 0; - - if(!dev->checkpointOpenForWrite) - return -1; - - while(i < nBytes && ok) { - - - - dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes ; - dev->checkpointSum += *dataBytes; - dev->checkpointXor ^= *dataBytes; - - dev->checkpointByteOffset++; - i++; - dataBytes++; - dev->checkpointByteCount++; - - - if(dev->checkpointByteOffset < 0 || - dev->checkpointByteOffset >= dev->nDataBytesPerChunk) - ok = yaffs_CheckpointFlushBuffer(dev); - - } - - return i; -} - -int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes) -{ - int i=0; - int ok = 1; - yaffs_ExtendedTags tags; - - - int chunk; - int realignedChunk; - - __u8 *dataBytes = (__u8 *)data; - - if(!dev->checkpointBuffer) - return 0; - - if(dev->checkpointOpenForWrite) - return -1; - - while(i < nBytes && ok) { - - - if(dev->checkpointByteOffset < 0 || - dev->checkpointByteOffset >= dev->nDataBytesPerChunk) { - - if(dev->checkpointCurrentBlock < 0){ - yaffs_CheckpointFindNextCheckpointBlock(dev); - dev->checkpointCurrentChunk = 0; - } - - if(dev->checkpointCurrentBlock < 0) - ok = 0; - else { - - chunk = dev->checkpointCurrentBlock * dev->nChunksPerBlock + - dev->checkpointCurrentChunk; - - realignedChunk = chunk - dev->chunkOffset; - - /* read in the next chunk */ - /* printf("read checkpoint page %d\n",dev->checkpointPage); */ - dev->readChunkWithTagsFromNAND(dev, realignedChunk, - dev->checkpointBuffer, - &tags); - - if(tags.chunkId != (dev->checkpointPageSequence + 1) || - tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA) - ok = 0; - - dev->checkpointByteOffset = 0; - dev->checkpointPageSequence++; - dev->checkpointCurrentChunk++; - - if(dev->checkpointCurrentChunk >= dev->nChunksPerBlock) - dev->checkpointCurrentBlock = -1; - } - } - - if(ok){ - *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset]; - dev->checkpointSum += *dataBytes; - dev->checkpointXor ^= *dataBytes; - dev->checkpointByteOffset++; - i++; - dataBytes++; - dev->checkpointByteCount++; - } - } - - return i; -} - -int yaffs_CheckpointClose(yaffs_Device *dev) -{ - - if(dev->checkpointOpenForWrite){ - if(dev->checkpointByteOffset != 0) - yaffs_CheckpointFlushBuffer(dev); - } else { - int i; - for(i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++){ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,dev->checkpointBlockList[i]); - if(bi->blockState == YAFFS_BLOCK_STATE_EMPTY) - bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; - else { - // Todo this looks odd... - } - } - YFREE(dev->checkpointBlockList); - dev->checkpointBlockList = NULL; - } - - dev->nFreeChunks -= dev->blocksInCheckpoint * dev->nChunksPerBlock; - dev->nErasedBlocks -= dev->blocksInCheckpoint; - - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint byte count %d" TENDSTR), - dev->checkpointByteCount)); - - if(dev->checkpointBuffer){ - /* free the buffer */ - YFREE(dev->checkpointBuffer); - dev->checkpointBuffer = NULL; - return 1; - } - else - return 0; - -} - -int yaffs_CheckpointInvalidateStream(yaffs_Device *dev) -{ - /* Erase the first checksum block */ - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("checkpoint invalidate"TENDSTR))); - - if(!yaffs_CheckpointSpaceOk(dev)) - return 0; - - return yaffs_CheckpointErase(dev); -} diff --git a/fs/yaffs2/yaffs_checkptrw.h b/fs/yaffs2/yaffs_checkptrw.h deleted file mode 100644 index e59d151..0000000 --- a/fs/yaffs2/yaffs_checkptrw.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_CHECKPTRW_H__ -#define __YAFFS_CHECKPTRW_H__ - -#include "yaffs_guts.h" - -int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting); - -int yaffs_CheckpointWrite(yaffs_Device *dev,const void *data, int nBytes); - -int yaffs_CheckpointRead(yaffs_Device *dev,void *data, int nBytes); - -int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum); - -int yaffs_CheckpointClose(yaffs_Device *dev); - -int yaffs_CheckpointInvalidateStream(yaffs_Device *dev); - - -#endif diff --git a/fs/yaffs2/yaffs_ecc.c b/fs/yaffs2/yaffs_ecc.c deleted file mode 100644 index 1b4a05d..0000000 --- a/fs/yaffs2/yaffs_ecc.c +++ /dev/null @@ -1,333 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * This code implements the ECC algorithm used in SmartMedia. - * - * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. - * The two unused bit are set to 1. - * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC - * blocks are used on a 512-byte NAND page. - * - */ - -/* Table generated by gen-ecc.c - * Using a table means we do not have to calculate p1..p4 and p1'..p4' - * for each byte of data. These are instead provided in a table in bits7..2. - * Bit 0 of each entry indicates whether the entry has an odd or even parity, and therefore - * this bytes influence on the line parity. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -const char *yaffs_ecc_c_version = - "$Id: yaffs_ecc.c,v 1.9 2007/02/14 01:09:06 wookey Exp $"; - -#include "yportenv.h" - -#include "yaffs_ecc.h" - -static const unsigned char column_parity_table[] = { - 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69, - 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00, - 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc, - 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95, - 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0, - 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99, - 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65, - 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c, - 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc, - 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5, - 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59, - 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30, - 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55, - 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c, - 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0, - 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9, - 0xa9, 0xfc, 0xf0, 0xa5, 0xcc, 0x99, 0x95, 0xc0, - 0xc0, 0x95, 0x99, 0xcc, 0xa5, 0xf0, 0xfc, 0xa9, - 0x3c, 0x69, 0x65, 0x30, 0x59, 0x0c, 0x00, 0x55, - 0x55, 0x00, 0x0c, 0x59, 0x30, 0x65, 0x69, 0x3c, - 0x30, 0x65, 0x69, 0x3c, 0x55, 0x00, 0x0c, 0x59, - 0x59, 0x0c, 0x00, 0x55, 0x3c, 0x69, 0x65, 0x30, - 0xa5, 0xf0, 0xfc, 0xa9, 0xc0, 0x95, 0x99, 0xcc, - 0xcc, 0x99, 0x95, 0xc0, 0xa9, 0xfc, 0xf0, 0xa5, - 0x0c, 0x59, 0x55, 0x00, 0x69, 0x3c, 0x30, 0x65, - 0x65, 0x30, 0x3c, 0x69, 0x00, 0x55, 0x59, 0x0c, - 0x99, 0xcc, 0xc0, 0x95, 0xfc, 0xa9, 0xa5, 0xf0, - 0xf0, 0xa5, 0xa9, 0xfc, 0x95, 0xc0, 0xcc, 0x99, - 0x95, 0xc0, 0xcc, 0x99, 0xf0, 0xa5, 0xa9, 0xfc, - 0xfc, 0xa9, 0xa5, 0xf0, 0x99, 0xcc, 0xc0, 0x95, - 0x00, 0x55, 0x59, 0x0c, 0x65, 0x30, 0x3c, 0x69, - 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00, -}; - -/* Count the bits in an unsigned char or a U32 */ - -static int yaffs_CountBits(unsigned char x) -{ - int r = 0; - while (x) { - if (x & 1) - r++; - x >>= 1; - } - return r; -} - -static int yaffs_CountBits32(unsigned x) -{ - int r = 0; - while (x) { - if (x & 1) - r++; - x >>= 1; - } - return r; -} - -/* Calculate the ECC for a 256-byte block of data */ -void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc) -{ - unsigned int i; - - unsigned char col_parity = 0; - unsigned char line_parity = 0; - unsigned char line_parity_prime = 0; - unsigned char t; - unsigned char b; - - for (i = 0; i < 256; i++) { - b = column_parity_table[*data++]; - col_parity ^= b; - - if (b & 0x01) // odd number of bits in the byte - { - line_parity ^= i; - line_parity_prime ^= ~i; - } - - } - - ecc[2] = (~col_parity) | 0x03; - - t = 0; - if (line_parity & 0x80) - t |= 0x80; - if (line_parity_prime & 0x80) - t |= 0x40; - if (line_parity & 0x40) - t |= 0x20; - if (line_parity_prime & 0x40) - t |= 0x10; - if (line_parity & 0x20) - t |= 0x08; - if (line_parity_prime & 0x20) - t |= 0x04; - if (line_parity & 0x10) - t |= 0x02; - if (line_parity_prime & 0x10) - t |= 0x01; - ecc[1] = ~t; - - t = 0; - if (line_parity & 0x08) - t |= 0x80; - if (line_parity_prime & 0x08) - t |= 0x40; - if (line_parity & 0x04) - t |= 0x20; - if (line_parity_prime & 0x04) - t |= 0x10; - if (line_parity & 0x02) - t |= 0x08; - if (line_parity_prime & 0x02) - t |= 0x04; - if (line_parity & 0x01) - t |= 0x02; - if (line_parity_prime & 0x01) - t |= 0x01; - ecc[0] = ~t; - -#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER - // Swap the bytes into the wrong order - t = ecc[0]; - ecc[0] = ecc[1]; - ecc[1] = t; -#endif -} - - -/* Correct the ECC on a 256 byte block of data */ - -int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc) -{ - unsigned char d0, d1, d2; /* deltas */ - - d0 = read_ecc[0] ^ test_ecc[0]; - d1 = read_ecc[1] ^ test_ecc[1]; - d2 = read_ecc[2] ^ test_ecc[2]; - - if ((d0 | d1 | d2) == 0) - return 0; /* no error */ - - if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 && - ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 && - ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) { - /* Single bit (recoverable) error in data */ - - unsigned byte; - unsigned bit; - -#ifdef CONFIG_YAFFS_ECC_WRONG_ORDER - // swap the bytes to correct for the wrong order - unsigned char t; - - t = d0; - d0 = d1; - d1 = t; -#endif - - bit = byte = 0; - - if (d1 & 0x80) - byte |= 0x80; - if (d1 & 0x20) - byte |= 0x40; - if (d1 & 0x08) - byte |= 0x20; - if (d1 & 0x02) - byte |= 0x10; - if (d0 & 0x80) - byte |= 0x08; - if (d0 & 0x20) - byte |= 0x04; - if (d0 & 0x08) - byte |= 0x02; - if (d0 & 0x02) - byte |= 0x01; - - if (d2 & 0x80) - bit |= 0x04; - if (d2 & 0x20) - bit |= 0x02; - if (d2 & 0x08) - bit |= 0x01; - - data[byte] ^= (1 << bit); - - return 1; /* Corrected the error */ - } - - if ((yaffs_CountBits(d0) + - yaffs_CountBits(d1) + - yaffs_CountBits(d2)) == 1) { - /* Reccoverable error in ecc */ - - read_ecc[0] = test_ecc[0]; - read_ecc[1] = test_ecc[1]; - read_ecc[2] = test_ecc[2]; - - return 1; /* Corrected the error */ - } - - /* Unrecoverable error */ - - return -1; - -} - - -/* - * ECCxxxOther does ECC calcs on arbitrary n bytes of data - */ -void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, - yaffs_ECCOther * eccOther) -{ - unsigned int i; - - unsigned char col_parity = 0; - unsigned line_parity = 0; - unsigned line_parity_prime = 0; - unsigned char b; - - for (i = 0; i < nBytes; i++) { - b = column_parity_table[*data++]; - col_parity ^= b; - - if (b & 0x01) { - /* odd number of bits in the byte */ - line_parity ^= i; - line_parity_prime ^= ~i; - } - - } - - eccOther->colParity = (col_parity >> 2) & 0x3f; - eccOther->lineParity = line_parity; - eccOther->lineParityPrime = line_parity_prime; -} - -int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, - yaffs_ECCOther * read_ecc, - const yaffs_ECCOther * test_ecc) -{ - unsigned char cDelta; /* column parity delta */ - unsigned lDelta; /* line parity delta */ - unsigned lDeltaPrime; /* line parity delta */ - unsigned bit; - - cDelta = read_ecc->colParity ^ test_ecc->colParity; - lDelta = read_ecc->lineParity ^ test_ecc->lineParity; - lDeltaPrime = read_ecc->lineParityPrime ^ test_ecc->lineParityPrime; - - if ((cDelta | lDelta | lDeltaPrime) == 0) - return 0; /* no error */ - - if (lDelta == ~lDeltaPrime && - (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15)) - { - /* Single bit (recoverable) error in data */ - - bit = 0; - - if (cDelta & 0x20) - bit |= 0x04; - if (cDelta & 0x08) - bit |= 0x02; - if (cDelta & 0x02) - bit |= 0x01; - - if(lDelta >= nBytes) - return -1; - - data[lDelta] ^= (1 << bit); - - return 1; /* corrected */ - } - - if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) + - yaffs_CountBits(cDelta)) == 1) { - /* Reccoverable error in ecc */ - - *read_ecc = *test_ecc; - return 1; /* corrected */ - } - - /* Unrecoverable error */ - - return -1; - -} diff --git a/fs/yaffs2/yaffs_ecc.h b/fs/yaffs2/yaffs_ecc.h deleted file mode 100644 index 79bc3d1..0000000 --- a/fs/yaffs2/yaffs_ecc.h +++ /dev/null @@ -1,44 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - - /* - * This code implements the ECC algorithm used in SmartMedia. - * - * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. - * The two unused bit are set to 1. - * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC - * blocks are used on a 512-byte NAND page. - * - */ - -#ifndef __YAFFS_ECC_H__ -#define __YAFFS_ECC_H__ - -typedef struct { - unsigned char colParity; - unsigned lineParity; - unsigned lineParityPrime; -} yaffs_ECCOther; - -void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc); -int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc); - -void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, - yaffs_ECCOther * ecc); -int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, - yaffs_ECCOther * read_ecc, - const yaffs_ECCOther * test_ecc); -#endif diff --git a/fs/yaffs2/yaffs_flashif.h b/fs/yaffs2/yaffs_flashif.h deleted file mode 100644 index 4e5157e..0000000 --- a/fs/yaffs2/yaffs_flashif.h +++ /dev/null @@ -1,31 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_FLASH_H__ -#define __YAFFS_FLASH_H__ - - -#include "yaffs_guts.h" -int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); -int yflash_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, const yaffs_Spare *spare); -int yflash_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_ExtendedTags *tags); -int yflash_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare); -int yflash_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags); -int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); -int yflash_InitialiseNAND(yaffs_Device *dev); -int yflash_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -int yflash_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber); - -#endif diff --git a/fs/yaffs2/yaffs_guts.c b/fs/yaffs2/yaffs_guts.c deleted file mode 100644 index 7390b40..0000000 --- a/fs/yaffs2/yaffs_guts.c +++ /dev/null @@ -1,7329 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -const char *yaffs_guts_c_version = - "$Id: yaffs_guts.c,v 1.52 2007/10/16 00:45:05 charles Exp $"; - -#include "yportenv.h" -#include "linux/stat.h" - -#include "yaffsinterface.h" -#include "yaffsfs.h" -#include "yaffs_guts.h" -#include "yaffs_tagsvalidity.h" - -#include "yaffs_tagscompat.h" -#ifndef CONFIG_YAFFS_USE_OWN_SORT -#include "yaffs_qsort.h" -#endif -#include "yaffs_nand.h" - -#include "yaffs_checkptrw.h" - -#include "yaffs_nand.h" -#include "yaffs_packedtags2.h" - -#include "malloc.h" - -#ifdef CONFIG_YAFFS_WINCE -void yfsd_LockYAFFS(BOOL fsLockOnly); -void yfsd_UnlockYAFFS(BOOL fsLockOnly); -#endif - -#define YAFFS_PASSIVE_GC_CHUNKS 2 - -#include "yaffs_ecc.h" - - -/* Robustification (if it ever comes about...) */ -static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND); -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk); -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags); -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_ExtendedTags * tags); - -/* Other local prototypes */ -static int yaffs_UnlinkObject( yaffs_Object *obj); -static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj); - -static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList); - -static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device * dev, - const __u8 * buffer, - yaffs_ExtendedTags * tags, - int useReserve); -static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, - int chunkInNAND, int inScan); - -static yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, - yaffs_ObjectType type); -static void yaffs_AddObjectToDirectory(yaffs_Object * directory, - yaffs_Object * obj); -static int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, - int force, int isShrink, int shadows); -static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj); -static int yaffs_CheckStructures(void); -static int yaffs_DoGenericObjectDeletion(yaffs_Object * in); - -static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blockNo); - -static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo); -static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, - int lineNo); - -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND); - -static int yaffs_UnlinkWorker(yaffs_Object * obj); -static void yaffs_DestroyObject(yaffs_Object * obj); - -static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId, - int chunkInObject); - -loff_t yaffs_GetFileSize(yaffs_Object * obj); - -static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr); - -static void yaffs_VerifyFreeChunks(yaffs_Device * dev); - -static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in); - -#ifdef YAFFS_PARANOID -static int yaffs_CheckFileSanity(yaffs_Object * in); -#else -#define yaffs_CheckFileSanity(in) -#endif - -static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in); -static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId); - -static void yaffs_InvalidateCheckpoint(yaffs_Device *dev); - -static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode, - yaffs_ExtendedTags * tags); - -static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos); -static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId); - - -/* Function to calculate chunk and offset */ - -static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, __u32 *chunk, __u32 *offset) -{ - if(dev->chunkShift){ - /* Easy-peasy power of 2 case */ - *chunk = (__u32)(addr >> dev->chunkShift); - *offset = (__u32)(addr & dev->chunkMask); - } - else if(dev->crumbsPerChunk) - { - /* Case where we're using "crumbs" */ - *offset = (__u32)(addr & dev->crumbMask); - addr >>= dev->crumbShift; - *chunk = ((__u32)addr)/dev->crumbsPerChunk; - *offset += ((addr - (*chunk * dev->crumbsPerChunk)) << dev->crumbShift); - } - else - YBUG(); -} - -/* Function to return the number of shifts for a power of 2 greater than or equal - * to the given number - * Note we don't try to cater for all possible numbers and this does not have to - * be hellishly efficient. - */ - -static __u32 ShiftsGE(__u32 x) -{ - int extraBits; - int nShifts; - - nShifts = extraBits = 0; - - while(x>1){ - if(x & 1) extraBits++; - x>>=1; - nShifts++; - } - - if(extraBits) - nShifts++; - - return nShifts; -} - -/* Function to return the number of shifts to get a 1 in bit 0 - */ - -static __u32 ShiftDiv(__u32 x) -{ - int nShifts; - - nShifts = 0; - - if(!x) return 0; - - while( !(x&1)){ - x>>=1; - nShifts++; - } - - return nShifts; -} - - - -/* - * Temporary buffer manipulations. - */ - -static int yaffs_InitialiseTempBuffers(yaffs_Device *dev) -{ - int i; - __u8 *buf = (__u8 *)1; - - memset(dev->tempBuffer,0,sizeof(dev->tempBuffer)); - - for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { - dev->tempBuffer[i].line = 0; /* not in use */ - dev->tempBuffer[i].buffer = buf = - YMALLOC_DMA(dev->nDataBytesPerChunk); - } - - return buf ? YAFFS_OK : YAFFS_FAIL; - -} - -static __u8 *yaffs_GetTempBuffer(yaffs_Device * dev, int lineNo) -{ - int i, j; - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].line == 0) { - dev->tempBuffer[i].line = lineNo; - if ((i + 1) > dev->maxTemp) { - dev->maxTemp = i + 1; - for (j = 0; j <= i; j++) - dev->tempBuffer[j].maxLine = - dev->tempBuffer[j].line; - } - - return dev->tempBuffer[i].buffer; - } - } - - T(YAFFS_TRACE_BUFFERS, - (TSTR("Out of temp buffers at line %d, other held by lines:"), - lineNo)); - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line)); - } - T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR))); - - /* - * If we got here then we have to allocate an unmanaged one - * This is not good. - */ - - dev->unmanagedTempAllocations++; - return YMALLOC(dev->nDataBytesPerChunk); - -} - -static void yaffs_ReleaseTempBuffer(yaffs_Device * dev, __u8 * buffer, - int lineNo) -{ - int i; - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].buffer == buffer) { - dev->tempBuffer[i].line = 0; - return; - } - } - - if (buffer) { - /* assume it is an unmanaged one. */ - T(YAFFS_TRACE_BUFFERS, - (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR), - lineNo)); - YFREE(buffer); - dev->unmanagedTempDeallocations++; - } - -} - -/* - * Determine if we have a managed buffer. - */ -int yaffs_IsManagedTempBuffer(yaffs_Device * dev, const __u8 * buffer) -{ - int i; - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].buffer == buffer) - return 1; - - } - - for (i = 0; i < dev->nShortOpCaches; i++) { - if( dev->srCache[i].data == buffer ) - return 1; - - } - - if (buffer == dev->checkpointBuffer) - return 1; - - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR))); - return 0; -} - - - -/* - * Chunk bitmap manipulations - */ - -static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device * dev, int blk) -{ - if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR), - blk)); - YBUG(); - } - return dev->chunkBits + - (dev->chunkBitmapStride * (blk - dev->internalStartBlock)); -} - -static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk) -{ - if(blk < dev->internalStartBlock || blk > dev->internalEndBlock || - chunk < 0 || chunk >= dev->nChunksPerBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR),blk,chunk)); - YBUG(); - } -} - -static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device * dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - - memset(blkBits, 0, dev->chunkBitmapStride); -} - -static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device * dev, int blk, int chunk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - - yaffs_VerifyChunkBitId(dev,blk,chunk); - - blkBits[chunk / 8] &= ~(1 << (chunk & 7)); -} - -static Y_INLINE void yaffs_SetChunkBit(yaffs_Device * dev, int blk, int chunk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - - yaffs_VerifyChunkBitId(dev,blk,chunk); - - blkBits[chunk / 8] |= (1 << (chunk & 7)); -} - -static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device * dev, int blk, int chunk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - yaffs_VerifyChunkBitId(dev,blk,chunk); - - return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; -} - -static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device * dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - int i; - for (i = 0; i < dev->chunkBitmapStride; i++) { - if (*blkBits) - return 1; - blkBits++; - } - return 0; -} - -static int yaffs_CountChunkBits(yaffs_Device * dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - int i; - int n = 0; - for (i = 0; i < dev->chunkBitmapStride; i++) { - __u8 x = *blkBits; - while(x){ - if(x & 1) - n++; - x >>=1; - } - - blkBits++; - } - return n; -} - -/* - * Verification code - */ - -static Y_INLINE int yaffs_SkipVerification(yaffs_Device *dev) -{ - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); -} - -static Y_INLINE int yaffs_SkipFullVerification(yaffs_Device *dev) -{ - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL)); -} - -static Y_INLINE int yaffs_SkipNANDVerification(yaffs_Device *dev) -{ - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND)); -} - -static const char * blockStateName[] = { -"Unknown", -"Needs scanning", -"Scanning", -"Empty", -"Allocating", -"Full", -"Dirty", -"Checkpoint", -"Collecting", -"Dead" -}; - -static void yaffs_VerifyBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) -{ - int actuallyUsed; - int inUse; - - if(yaffs_SkipVerification(dev)) - return; - - /* Report illegal runtime states */ - if(bi->blockState <0 || bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has undefined state %d"TENDSTR),n,bi->blockState)); - - switch(bi->blockState){ - case YAFFS_BLOCK_STATE_UNKNOWN: - case YAFFS_BLOCK_STATE_SCANNING: - case YAFFS_BLOCK_STATE_NEEDS_SCANNING: - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has bad run-state %s"TENDSTR), - n,blockStateName[bi->blockState])); - } - - /* Check pages in use and soft deletions are legal */ - - actuallyUsed = bi->pagesInUse - bi->softDeletions; - - if(bi->pagesInUse < 0 || bi->pagesInUse > dev->nChunksPerBlock || - bi->softDeletions < 0 || bi->softDeletions > dev->nChunksPerBlock || - actuallyUsed < 0 || actuallyUsed > dev->nChunksPerBlock) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR), - n,bi->pagesInUse,bi->softDeletions)); - - - /* Check chunk bitmap legal */ - inUse = yaffs_CountChunkBits(dev,n); - if(inUse != bi->pagesInUse) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR), - n,bi->pagesInUse,inUse)); - - /* Check that the sequence number is valid. - * Ten million is legal, but is very unlikely - */ - if(dev->isYaffs2 && - (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) && - (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000 )) - T(YAFFS_TRACE_VERIFY,(TSTR("Block %d has suspect sequence number of %d"TENDSTR), - n,bi->sequenceNumber)); - -} - -static void yaffs_VerifyCollectedBlock(yaffs_Device *dev,yaffs_BlockInfo *bi,int n) -{ - yaffs_VerifyBlock(dev,bi,n); - - /* After collection the block should be in the erased state */ - /* TODO: This will need to change if we do partial gc */ - - if(bi->blockState != YAFFS_BLOCK_STATE_EMPTY){ - T(YAFFS_TRACE_ERROR,(TSTR("Block %d is in state %d after gc, should be erased"TENDSTR), - n,bi->blockState)); - } -} - -static void yaffs_VerifyBlocks(yaffs_Device *dev) -{ - int i; - int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES]; - int nIllegalBlockStates = 0; - - - if(yaffs_SkipVerification(dev)) - return; - - memset(nBlocksPerState,0,sizeof(nBlocksPerState)); - - - for(i = dev->internalStartBlock; i <= dev->internalEndBlock; i++){ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev,i); - yaffs_VerifyBlock(dev,bi,i); - - if(bi->blockState >=0 && bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES) - nBlocksPerState[bi->blockState]++; - else - nIllegalBlockStates++; - - } - - T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); - T(YAFFS_TRACE_VERIFY,(TSTR("Block summary"TENDSTR))); - - T(YAFFS_TRACE_VERIFY,(TSTR("%d blocks have illegal states"TENDSTR),nIllegalBlockStates)); - if(nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1) - T(YAFFS_TRACE_VERIFY,(TSTR("Too many allocating blocks"TENDSTR))); - - for(i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) - T(YAFFS_TRACE_VERIFY, - (TSTR("%s %d blocks"TENDSTR), - blockStateName[i],nBlocksPerState[i])); - - if(dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]) - T(YAFFS_TRACE_VERIFY, - (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR), - dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])); - - if(dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]) - T(YAFFS_TRACE_VERIFY, - (TSTR("Erased block count wrong dev %d count %d"TENDSTR), - dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])); - - if(nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1) - T(YAFFS_TRACE_VERIFY, - (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR), - nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING])); - - T(YAFFS_TRACE_VERIFY,(TSTR(""TENDSTR))); - -} - -/* - * Verify the object header. oh must be valid, but obj and tags may be NULL in which - * case those tests will not be performed. - */ -static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck) -{ - if(yaffs_SkipVerification(obj->myDev)) - return; - - if(!(tags && obj && oh)){ - T(YAFFS_TRACE_VERIFY, - (TSTR("Verifying object header tags %x obj %x oh %x"TENDSTR), - (__u32)tags,(__u32)obj,(__u32)oh)); - return; - } - - if(oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || - oh->type > YAFFS_OBJECT_TYPE_MAX) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR), - tags->objectId, oh->type)); - - if(tags->objectId != obj->objectId) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch objectId %d"TENDSTR), - tags->objectId, obj->objectId)); - - - /* - * Check that the object's parent ids match if parentCheck requested. - * - * Tests do not apply to the root object. - */ - - if(parentCheck && tags->objectId > 1 && !obj->parent) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR), - tags->objectId, oh->parentObjectId)); - - - if(parentCheck && obj->parent && - oh->parentObjectId != obj->parent->objectId && - (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED || - obj->parent->objectId != YAFFS_OBJECTID_DELETED)) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR), - tags->objectId, oh->parentObjectId, obj->parent->objectId)); - - - if(tags->objectId > 1 && oh->name[0] == 0) /* Null name */ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header name is NULL"TENDSTR), - obj->objectId)); - - if(tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header name is 0xFF"TENDSTR), - obj->objectId)); -} - -static void yaffs_VerifyFile(yaffs_Object *obj) -{ - int requiredTallness; - int actualTallness; - __u32 lastChunk; - __u32 x; - __u32 i; - yaffs_Device *dev; - yaffs_ExtendedTags tags; - yaffs_Tnode *tn; - __u32 objectId; - - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - - dev = obj->myDev; - objectId = obj->objectId; - - /* Check file size is consistent with tnode depth */ - lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1; - x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; - while (x> 0) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; - } - - actualTallness = obj->variant.fileVariant.topLevel; - - if(requiredTallness > actualTallness ) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d had tnode tallness %d, needs to be %d"TENDSTR), - obj->objectId,actualTallness, requiredTallness)); - - - /* Check that the chunks in the tnode tree are all correct. - * We do this by scanning through the tnode tree and - * checking the tags for every chunk match. - */ - - if(yaffs_SkipNANDVerification(dev)) - return; - - for(i = 1; i <= lastChunk; i++){ - tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant,i); - - if (tn) { - __u32 theChunk = yaffs_GetChunkGroupBase(dev,tn,i); - if(theChunk > 0){ - /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */ - yaffs_ReadChunkWithTagsFromNAND(dev,theChunk,NULL, &tags); - if(tags.objectId != objectId || tags.chunkId != i){ - T(~0,(TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), - objectId, i, theChunk, - tags.objectId, tags.chunkId)); - } - } - } - - } - -} - -static void yaffs_VerifyDirectory(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - -} - -static void yaffs_VerifyHardLink(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - - /* Verify sane equivalent object */ -} - -static void yaffs_VerifySymlink(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; - - /* Verify symlink string */ -} - -static void yaffs_VerifySpecial(yaffs_Object *obj) -{ - if(obj && yaffs_SkipVerification(obj->myDev)) - return; -} - -static void yaffs_VerifyObject(yaffs_Object *obj) -{ - yaffs_Device *dev; - - __u32 chunkMin; - __u32 chunkMax; - - __u32 chunkIdOk; - __u32 chunkIsLive; - - if(!obj) - return; - - dev = obj->myDev; - - if(yaffs_SkipVerification(dev)) - return; - - /* Check sane object header chunk */ - - chunkMin = dev->internalStartBlock * dev->nChunksPerBlock; - chunkMax = (dev->internalEndBlock+1) * dev->nChunksPerBlock - 1; - - chunkIdOk = (obj->chunkId >= chunkMin && obj->chunkId <= chunkMax); - chunkIsLive = chunkIdOk && - yaffs_CheckChunkBit(dev, - obj->chunkId / dev->nChunksPerBlock, - obj->chunkId % dev->nChunksPerBlock); - if(!obj->fake && - (!chunkIdOk || !chunkIsLive)) { - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has chunkId %d %s %s"TENDSTR), - obj->objectId,obj->chunkId, - chunkIdOk ? "" : ",out of range", - chunkIsLive || !chunkIdOk ? "" : ",marked as deleted")); - } - - if(chunkIdOk && chunkIsLive &&!yaffs_SkipNANDVerification(dev)) { - yaffs_ExtendedTags tags; - yaffs_ObjectHeader *oh; - __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__); - - oh = (yaffs_ObjectHeader *)buffer; - - yaffs_ReadChunkWithTagsFromNAND(dev, obj->chunkId,buffer, &tags); - - yaffs_VerifyObjectHeader(obj,oh,&tags,1); - - yaffs_ReleaseTempBuffer(dev,buffer,__LINE__); - } - - /* Verify it has a parent */ - if(obj && !obj->fake && - (!obj->parent || obj->parent->myDev != dev)){ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR), - obj->objectId,obj->parent)); - } - - /* Verify parent is a directory */ - if(obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY){ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR), - obj->objectId,obj->parent->variantType)); - } - - switch(obj->variantType){ - case YAFFS_OBJECT_TYPE_FILE: - yaffs_VerifyFile(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_VerifySymlink(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - yaffs_VerifyDirectory(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - yaffs_VerifyHardLink(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - yaffs_VerifySpecial(obj); - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - default: - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has illegaltype %d"TENDSTR), - obj->objectId,obj->variantType)); - break; - } - - -} - -static void yaffs_VerifyObjects(yaffs_Device *dev) -{ - yaffs_Object *obj; - int i; - struct list_head *lh; - - if(yaffs_SkipVerification(dev)) - return; - - /* Iterate through the objects in each hash entry */ - - for(i = 0; i < YAFFS_NOBJECT_BUCKETS; i++){ - list_for_each(lh, &dev->objectBucket[i].list) { - if (lh) { - obj = list_entry(lh, yaffs_Object, hashLink); - yaffs_VerifyObject(obj); - } - } - } - -} - - -/* - * Simple hash function. Needs to have a reasonable spread - */ - -static Y_INLINE int yaffs_HashFunction(int n) -{ -/* XXX U-BOOT XXX */ - /*n = abs(n); */ - if (n < 0) - n = -n; - return (n % YAFFS_NOBJECT_BUCKETS); -} - -/* - * Access functions to useful fake objects - */ - -yaffs_Object *yaffs_Root(yaffs_Device * dev) -{ - return dev->rootDir; -} - -yaffs_Object *yaffs_LostNFound(yaffs_Device * dev) -{ - return dev->lostNFoundDir; -} - - -/* - * Erased NAND checking functions - */ - -int yaffs_CheckFF(__u8 * buffer, int nBytes) -{ - /* Horrible, slow implementation */ - while (nBytes--) { - if (*buffer != 0xFF) - return 0; - buffer++; - } - return 1; -} - -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND) -{ - - int retval = YAFFS_OK; - __u8 *data = yaffs_GetTempBuffer(dev, __LINE__); - yaffs_ExtendedTags tags; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags); - - if(tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR) - retval = YAFFS_FAIL; - - - if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND)); - retval = YAFFS_FAIL; - } - - yaffs_ReleaseTempBuffer(dev, data, __LINE__); - - return retval; - -} - -static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, - const __u8 * data, - yaffs_ExtendedTags * tags, - int useReserve) -{ - int attempts = 0; - int writeOk = 0; - int chunk; - - yaffs_InvalidateCheckpoint(dev); - - do { - yaffs_BlockInfo *bi = 0; - int erasedOk = 0; - - chunk = yaffs_AllocateChunk(dev, useReserve, &bi); - if (chunk < 0) { - /* no space */ - break; - } - - /* First check this chunk is erased, if it needs - * checking. The checking policy (unless forced - * always on) is as follows: - * - * Check the first page we try to write in a block. - * If the check passes then we don't need to check any - * more. If the check fails, we check again... - * If the block has been erased, we don't need to check. - * - * However, if the block has been prioritised for gc, - * then we think there might be something odd about - * this block and stop using it. - * - * Rationale: We should only ever see chunks that have - * not been erased if there was a partially written - * chunk due to power loss. This checking policy should - * catch that case with very few checks and thus save a - * lot of checks that are most likely not needed. - */ - if (bi->gcPrioritise) { - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); - /* try another chunk */ - continue; - } - - /* let's give it a try */ - attempts++; - -#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED - bi->skipErasedCheck = 0; -#endif - if (!bi->skipErasedCheck) { - erasedOk = yaffs_CheckChunkErased(dev, chunk); - if (erasedOk != YAFFS_OK) { - T(YAFFS_TRACE_ERROR, - (TSTR ("**>> yaffs chunk %d was not erased" - TENDSTR), chunk)); - - /* try another chunk */ - continue; - } - bi->skipErasedCheck = 1; - } - - writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk, - data, tags); - if (writeOk != YAFFS_OK) { - yaffs_HandleWriteChunkError(dev, chunk, erasedOk); - /* try another chunk */ - continue; - } - - /* Copy the data into the robustification buffer */ - yaffs_HandleWriteChunkOk(dev, chunk, data, tags); - - } while (writeOk != YAFFS_OK && - (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); - - if(!writeOk) - chunk = -1; - - if (attempts > 1) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs write required %d attempts" TENDSTR), - attempts)); - - dev->nRetriedWrites += (attempts - 1); - } - - return chunk; -} - -/* - * Block retiring for handling a broken block. - */ - -static void yaffs_RetireBlock(yaffs_Device * dev, int blockInNAND) -{ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); - - yaffs_InvalidateCheckpoint(dev); - - yaffs_MarkBlockBad(dev, blockInNAND); - - bi->blockState = YAFFS_BLOCK_STATE_DEAD; - bi->gcPrioritise = 0; - bi->needsRetiring = 0; - - dev->nRetiredBlocks++; -} - -/* - * Functions for robustisizing TODO - * - */ - -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags) -{ -} - -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_ExtendedTags * tags) -{ -} - -void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi) -{ - if(!bi->gcPrioritise){ - bi->gcPrioritise = 1; - dev->hasPendingPrioritisedGCs = 1; - bi->chunkErrorStrikes ++; - - if(bi->chunkErrorStrikes > 3){ - bi->needsRetiring = 1; /* Too many stikes, so retire this */ - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR))); - - } - - } -} - -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND, int erasedOk) -{ - - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); - - yaffs_HandleChunkError(dev,bi); - - - if(erasedOk ) { - /* Was an actual write failure, so mark the block for retirement */ - bi->needsRetiring = 1; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND)); - - - } - - /* Delete the chunk */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); -} - - -/*---------------- Name handling functions ------------*/ - -static __u16 yaffs_CalcNameSum(const YCHAR * name) -{ - __u16 sum = 0; - __u16 i = 1; - - YUCHAR *bname = (YUCHAR *) name; - if (bname) { - while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) { - -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - sum += yaffs_toupper(*bname) * i; -#else - sum += (*bname) * i; -#endif - i++; - bname++; - } - } - return sum; -} - -static void yaffs_SetObjectName(yaffs_Object * obj, const YCHAR * name) -{ -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - if (name && yaffs_strlen(name) <= YAFFS_SHORT_NAME_LENGTH) { - yaffs_strcpy(obj->shortName, name); - } else { - obj->shortName[0] = _Y('\0'); - } -#endif - obj->sum = yaffs_CalcNameSum(name); -} - -/*-------------------- TNODES ------------------- - - * List of spare tnodes - * The list is hooked together using the first pointer - * in the tnode. - */ - -/* yaffs_CreateTnodes creates a bunch more tnodes and - * adds them to the tnode free list. - * Don't use this function directly - */ - -static int yaffs_CreateTnodes(yaffs_Device * dev, int nTnodes) -{ - int i; - int tnodeSize; - yaffs_Tnode *newTnodes; - __u8 *mem; - yaffs_Tnode *curr; - yaffs_Tnode *next; - yaffs_TnodeList *tnl; - - if (nTnodes < 1) - return YAFFS_OK; - - /* Calculate the tnode size in bytes for variable width tnode support. - * Must be a multiple of 32-bits */ - tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - - /* make these things */ - - newTnodes = YMALLOC(nTnodes * tnodeSize); - mem = (__u8 *)newTnodes; - - if (!newTnodes) { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: Could not allocate Tnodes" TENDSTR))); - return YAFFS_FAIL; - } - - /* Hook them into the free list */ -#if 0 - for (i = 0; i < nTnodes - 1; i++) { - newTnodes[i].internal[0] = &newTnodes[i + 1]; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - } - - newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - dev->freeTnodes = newTnodes; -#else - /* New hookup for wide tnodes */ - for(i = 0; i < nTnodes -1; i++) { - curr = (yaffs_Tnode *) &mem[i * tnodeSize]; - next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize]; - curr->internal[0] = next; - } - - curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize]; - curr->internal[0] = dev->freeTnodes; - dev->freeTnodes = (yaffs_Tnode *)mem; - -#endif - - - dev->nFreeTnodes += nTnodes; - dev->nTnodesCreated += nTnodes; - - /* Now add this bunch of tnodes to a list for freeing up. - * NB If we can't add this to the management list it isn't fatal - * but it just means we can't free this bunch of tnodes later. - */ - - tnl = YMALLOC(sizeof(yaffs_TnodeList)); - if (!tnl) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs: Could not add tnodes to management list" TENDSTR))); - return YAFFS_FAIL; - - } else { - tnl->tnodes = newTnodes; - tnl->next = dev->allocatedTnodeList; - dev->allocatedTnodeList = tnl; - } - - T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR))); - - return YAFFS_OK; -} - -/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */ - -static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device * dev) -{ - yaffs_Tnode *tn = NULL; - - /* If there are none left make more */ - if (!dev->freeTnodes) { - yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES); - } - - if (dev->freeTnodes) { - tn = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) { - /* Hoosterman, this thing looks like it isn't in the list */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Tnode list bug 1" TENDSTR))); - } -#endif - dev->freeTnodes = dev->freeTnodes->internal[0]; - dev->nFreeTnodes--; - } - - return tn; -} - -static yaffs_Tnode *yaffs_GetTnode(yaffs_Device * dev) -{ - yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev); - - if(tn) - memset(tn, 0, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); - - return tn; -} - -/* FreeTnode frees up a tnode and puts it back on the free list */ -static void yaffs_FreeTnode(yaffs_Device * dev, yaffs_Tnode * tn) -{ - if (tn) { -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) { - /* Hoosterman, this thing looks like it is already in the list */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Tnode list bug 2" TENDSTR))); - } - tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - tn->internal[0] = dev->freeTnodes; - dev->freeTnodes = tn; - dev->nFreeTnodes++; - } -} - -static void yaffs_DeinitialiseTnodes(yaffs_Device * dev) -{ - /* Free the list of allocated tnodes */ - yaffs_TnodeList *tmp; - - while (dev->allocatedTnodeList) { - tmp = dev->allocatedTnodeList->next; - - YFREE(dev->allocatedTnodeList->tnodes); - YFREE(dev->allocatedTnodeList); - dev->allocatedTnodeList = tmp; - - } - - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; -} - -static void yaffs_InitialiseTnodes(yaffs_Device * dev) -{ - dev->allocatedTnodeList = NULL; - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; - dev->nTnodesCreated = 0; - -} - - -void yaffs_PutLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, unsigned val) -{ - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 mask; - - pos &= YAFFS_TNODES_LEVEL0_MASK; - val >>= dev->chunkGroupBits; - - bitInMap = pos * dev->tnodeWidth; - wordInMap = bitInMap /32; - bitInWord = bitInMap & (32 -1); - - mask = dev->tnodeMask << bitInWord; - - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val << bitInWord)); - - if(dev->tnodeWidth > (32-bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord); - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val >> bitInWord)); - } -} - -static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos) -{ - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 val; - - pos &= YAFFS_TNODES_LEVEL0_MASK; - - bitInMap = pos * dev->tnodeWidth; - wordInMap = bitInMap /32; - bitInWord = bitInMap & (32 -1); - - val = map[wordInMap] >> bitInWord; - - if(dev->tnodeWidth > (32-bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - val |= (map[wordInMap] << bitInWord); - } - - val &= dev->tnodeMask; - val <<= dev->chunkGroupBits; - - return val; -} - -/* ------------------- End of individual tnode manipulation -----------------*/ - -/* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ - * The look up tree is represented by the top tnode and the number of topLevel - * in the tree. 0 means only the level 0 tnode is in the tree. - */ - -/* FindLevel0Tnode finds the level 0 tnode, if one exists. */ -static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId) -{ - - yaffs_Tnode *tn = fStruct->top; - __u32 i; - int requiredTallness; - int level = fStruct->topLevel; - - /* Check sane level and chunk Id */ - if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) { - return NULL; - } - - if (chunkId > YAFFS_MAX_CHUNK_ID) { - return NULL; - } - - /* First check we're tall enough (ie enough topLevel) */ - - i = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; - while (i) { - i >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; - } - - if (requiredTallness > fStruct->topLevel) { - /* Not tall enough, so we can't find it, return NULL. */ - return NULL; - } - - /* Traverse down to level 0 */ - while (level > 0 && tn) { - tn = tn-> - internal[(chunkId >> - ( YAFFS_TNODES_LEVEL0_BITS + - (level - 1) * - YAFFS_TNODES_INTERNAL_BITS) - ) & - YAFFS_TNODES_INTERNAL_MASK]; - level--; - - } - - return tn; -} - -/* AddOrFindLevel0Tnode finds the level 0 tnode if it exists, otherwise first expands the tree. - * This happens in two steps: - * 1. If the tree isn't tall enough, then make it taller. - * 2. Scan down the tree towards the level 0 tnode adding tnodes if required. - * - * Used when modifying the tree. - * - * If the tn argument is NULL, then a fresh tnode will be added otherwise the specified tn will - * be plugged into the ttree. - */ - -static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device * dev, - yaffs_FileStructure * fStruct, - __u32 chunkId, - yaffs_Tnode *passedTn) -{ - - int requiredTallness; - int i; - int l; - yaffs_Tnode *tn; - - __u32 x; - - - /* Check sane level and page Id */ - if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) { - return NULL; - } - - if (chunkId > YAFFS_MAX_CHUNK_ID) { - return NULL; - } - - /* First check we're tall enough (ie enough topLevel) */ - - x = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; - while (x) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; - } - - - if (requiredTallness > fStruct->topLevel) { - /* Not tall enough,gotta make the tree taller */ - for (i = fStruct->topLevel; i < requiredTallness; i++) { - - tn = yaffs_GetTnode(dev); - - if (tn) { - tn->internal[0] = fStruct->top; - fStruct->top = tn; - } else { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: no more tnodes" TENDSTR))); - } - } - - fStruct->topLevel = requiredTallness; - } - - /* Traverse down to level 0, adding anything we need */ - - l = fStruct->topLevel; - tn = fStruct->top; - - if(l > 0) { - while (l > 0 && tn) { - x = (chunkId >> - ( YAFFS_TNODES_LEVEL0_BITS + - (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & - YAFFS_TNODES_INTERNAL_MASK; - - - if((l>1) && !tn->internal[x]){ - /* Add missing non-level-zero tnode */ - tn->internal[x] = yaffs_GetTnode(dev); - - } else if(l == 1) { - /* Looking from level 1 at level 0 */ - if (passedTn) { - /* If we already have one, then release it.*/ - if(tn->internal[x]) - yaffs_FreeTnode(dev,tn->internal[x]); - tn->internal[x] = passedTn; - - } else if(!tn->internal[x]) { - /* Don't have one, none passed in */ - tn->internal[x] = yaffs_GetTnode(dev); - } - } - - tn = tn->internal[x]; - l--; - } - } else { - /* top is level 0 */ - if(passedTn) { - memcpy(tn,passedTn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); - yaffs_FreeTnode(dev,passedTn); - } - } - - return tn; -} - -static int yaffs_FindChunkInGroup(yaffs_Device * dev, int theChunk, - yaffs_ExtendedTags * tags, int objectId, - int chunkInInode) -{ - int j; - - for (j = 0; theChunk && j < dev->chunkGroupSize; j++) { - if (yaffs_CheckChunkBit - (dev, theChunk / dev->nChunksPerBlock, - theChunk % dev->nChunksPerBlock)) { - yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, - tags); - if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { - /* found it; */ - return theChunk; - - } - } - theChunk++; - } - return -1; -} - -static void yaffs_SoftDeleteChunk(yaffs_Device * dev, int chunk) -{ - - yaffs_BlockInfo *theBlock; - - T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); - - theBlock = yaffs_GetBlockInfo(dev, chunk / dev->nChunksPerBlock); - if (theBlock) { - theBlock->softDeletions++; - dev->nFreeChunks++; - } -} - -/* SoftDeleteWorker scans backwards through the tnode tree and soft deletes all the chunks in the file. - * All soft deleting does is increment the block's softdelete count and pulls the chunk out - * of the tnode. - * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted. - */ - -static int yaffs_SoftDeleteWorker(yaffs_Object * in, yaffs_Tnode * tn, - __u32 level, int chunkOffset) -{ - int i; - int theChunk; - int allDone = 1; - yaffs_Device *dev = in->myDev; - - if (tn) { - if (level > 0) { - - for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; - i--) { - if (tn->internal[i]) { - allDone = - yaffs_SoftDeleteWorker(in, - tn-> - internal[i], - level - 1, - (chunkOffset - << - YAFFS_TNODES_INTERNAL_BITS) - + i); - if (allDone) { - yaffs_FreeTnode(dev, - tn-> - internal[i]); - tn->internal[i] = NULL; - } else { - /* Hoosterman... how could this happen? */ - } - } - } - return (allDone) ? 1 : 0; - } else if (level == 0) { - - for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { - theChunk = yaffs_GetChunkGroupBase(dev,tn,i); - if (theChunk) { - /* Note this does not find the real chunk, only the chunk group. - * We make an assumption that a chunk group is not larger than - * a block. - */ - yaffs_SoftDeleteChunk(dev, theChunk); - yaffs_PutLevel0Tnode(dev,tn,i,0); - } - - } - return 1; - - } - - } - - return 1; - -} - -static void yaffs_SoftDeleteFile(yaffs_Object * obj) -{ - if (obj->deleted && - obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) { - if (obj->nDataChunks <= 0) { - /* Empty file with no duplicate object headers, just delete it immediately */ - yaffs_FreeTnode(obj->myDev, - obj->variant.fileVariant.top); - obj->variant.fileVariant.top = NULL; - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: Deleting empty file %d" TENDSTR), - obj->objectId)); - yaffs_DoGenericObjectDeletion(obj); - } else { - yaffs_SoftDeleteWorker(obj, - obj->variant.fileVariant.top, - obj->variant.fileVariant. - topLevel, 0); - obj->softDeleted = 1; - } - } -} - -/* Pruning removes any part of the file structure tree that is beyond the - * bounds of the file (ie that does not point to chunks). - * - * A file should only get pruned when its size is reduced. - * - * Before pruning, the chunks must be pulled from the tree and the - * level 0 tnode entries must be zeroed out. - * Could also use this for file deletion, but that's probably better handled - * by a special case. - */ - -static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device * dev, yaffs_Tnode * tn, - __u32 level, int del0) -{ - int i; - int hasData; - - if (tn) { - hasData = 0; - - for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i] && level > 0) { - tn->internal[i] = - yaffs_PruneWorker(dev, tn->internal[i], - level - 1, - (i == 0) ? del0 : 1); - } - - if (tn->internal[i]) { - hasData++; - } - } - - if (hasData == 0 && del0) { - /* Free and return NULL */ - - yaffs_FreeTnode(dev, tn); - tn = NULL; - } - - } - - return tn; - -} - -static int yaffs_PruneFileStructure(yaffs_Device * dev, - yaffs_FileStructure * fStruct) -{ - int i; - int hasData; - int done = 0; - yaffs_Tnode *tn; - - if (fStruct->topLevel > 0) { - fStruct->top = - yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0); - - /* Now we have a tree with all the non-zero branches NULL but the height - * is the same as it was. - * Let's see if we can trim internal tnodes to shorten the tree. - * We can do this if only the 0th element in the tnode is in use - * (ie all the non-zero are NULL) - */ - - while (fStruct->topLevel && !done) { - tn = fStruct->top; - - hasData = 0; - for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) { - hasData++; - } - } - - if (!hasData) { - fStruct->top = tn->internal[0]; - fStruct->topLevel--; - yaffs_FreeTnode(dev, tn); - } else { - done = 1; - } - } - } - - return YAFFS_OK; -} - -/*-------------------- End of File Structure functions.-------------------*/ - -/* yaffs_CreateFreeObjects creates a bunch more objects and - * adds them to the object free list. - */ -static int yaffs_CreateFreeObjects(yaffs_Device * dev, int nObjects) -{ - int i; - yaffs_Object *newObjects; - yaffs_ObjectList *list; - - if (nObjects < 1) - return YAFFS_OK; - - /* make these things */ - newObjects = YMALLOC(nObjects * sizeof(yaffs_Object)); - list = YMALLOC(sizeof(yaffs_ObjectList)); - - if (!newObjects || !list) { - if(newObjects) - YFREE(newObjects); - if(list) - YFREE(list); - T(YAFFS_TRACE_ALLOCATE, - (TSTR("yaffs: Could not allocate more objects" TENDSTR))); - return YAFFS_FAIL; - } - - /* Hook them into the free list */ - for (i = 0; i < nObjects - 1; i++) { - newObjects[i].siblings.next = - (struct list_head *)(&newObjects[i + 1]); - } - - newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects; - dev->freeObjects = newObjects; - dev->nFreeObjects += nObjects; - dev->nObjectsCreated += nObjects; - - /* Now add this bunch of Objects to a list for freeing up. */ - - list->objects = newObjects; - list->next = dev->allocatedObjectList; - dev->allocatedObjectList = list; - - return YAFFS_OK; -} - - -/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ -static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device * dev) -{ - yaffs_Object *tn = NULL; - - /* If there are none left make more */ - if (!dev->freeObjects) { - yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS); - } - - if (dev->freeObjects) { - tn = dev->freeObjects; - dev->freeObjects = - (yaffs_Object *) (dev->freeObjects->siblings.next); - dev->nFreeObjects--; - - /* Now sweeten it up... */ - - memset(tn, 0, sizeof(yaffs_Object)); - tn->myDev = dev; - tn->chunkId = -1; - tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN; - INIT_LIST_HEAD(&(tn->hardLinks)); - INIT_LIST_HEAD(&(tn->hashLink)); - INIT_LIST_HEAD(&tn->siblings); - - /* Add it to the lost and found directory. - * NB Can't put root or lostNFound in lostNFound so - * check if lostNFound exists first - */ - if (dev->lostNFoundDir) { - yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn); - } - } - - return tn; -} - -static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device * dev, int number, - __u32 mode) -{ - - yaffs_Object *obj = - yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); - if (obj) { - obj->fake = 1; /* it is fake so it has no NAND presence... */ - obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */ - obj->unlinkAllowed = 0; /* ... or unlink it */ - obj->deleted = 0; - obj->unlinked = 0; - obj->yst_mode = mode; - obj->myDev = dev; - obj->chunkId = 0; /* Not a valid chunk. */ - } - - return obj; - -} - -static void yaffs_UnhashObject(yaffs_Object * tn) -{ - int bucket; - yaffs_Device *dev = tn->myDev; - - /* If it is still linked into the bucket list, free from the list */ - if (!list_empty(&tn->hashLink)) { - list_del_init(&tn->hashLink); - bucket = yaffs_HashFunction(tn->objectId); - dev->objectBucket[bucket].count--; - } - -} - -/* FreeObject frees up a Object and puts it back on the free list */ -static void yaffs_FreeObject(yaffs_Object * tn) -{ - - yaffs_Device *dev = tn->myDev; - -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - if (tn->myInode) { - /* We're still hooked up to a cached inode. - * Don't delete now, but mark for later deletion - */ - tn->deferedFree = 1; - return; - } -#endif -#endif - yaffs_UnhashObject(tn); - - /* Link into the free list. */ - tn->siblings.next = (struct list_head *)(dev->freeObjects); - dev->freeObjects = tn; - dev->nFreeObjects++; -} - -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - -void yaffs_HandleDeferedFree(yaffs_Object * obj) -{ - if (obj->deferedFree) { - yaffs_FreeObject(obj); - } -} - -#endif -#endif - -static void yaffs_DeinitialiseObjects(yaffs_Device * dev) -{ - /* Free the list of allocated Objects */ - - yaffs_ObjectList *tmp; - - while (dev->allocatedObjectList) { - tmp = dev->allocatedObjectList->next; - YFREE(dev->allocatedObjectList->objects); - YFREE(dev->allocatedObjectList); - - dev->allocatedObjectList = tmp; - } - - dev->freeObjects = NULL; - dev->nFreeObjects = 0; -} - -static void yaffs_InitialiseObjects(yaffs_Device * dev) -{ - int i; - - dev->allocatedObjectList = NULL; - dev->freeObjects = NULL; - dev->nFreeObjects = 0; - - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - INIT_LIST_HEAD(&dev->objectBucket[i].list); - dev->objectBucket[i].count = 0; - } - -} - -static int yaffs_FindNiceObjectBucket(yaffs_Device * dev) -{ - static int x = 0; - int i; - int l = 999; - int lowest = 999999; - - /* First let's see if we can find one that's empty. */ - - for (i = 0; i < 10 && lowest > 0; i++) { - x++; - x %= YAFFS_NOBJECT_BUCKETS; - if (dev->objectBucket[x].count < lowest) { - lowest = dev->objectBucket[x].count; - l = x; - } - - } - - /* If we didn't find an empty list, then try - * looking a bit further for a short one - */ - - for (i = 0; i < 10 && lowest > 3; i++) { - x++; - x %= YAFFS_NOBJECT_BUCKETS; - if (dev->objectBucket[x].count < lowest) { - lowest = dev->objectBucket[x].count; - l = x; - } - - } - - return l; -} - -static int yaffs_CreateNewObjectNumber(yaffs_Device * dev) -{ - int bucket = yaffs_FindNiceObjectBucket(dev); - - /* Now find an object value that has not already been taken - * by scanning the list. - */ - - int found = 0; - struct list_head *i; - - __u32 n = (__u32) bucket; - - /* yaffs_CheckObjectHashSanity(); */ - - while (!found) { - found = 1; - n += YAFFS_NOBJECT_BUCKETS; - if (1 || dev->objectBucket[bucket].count > 0) { - list_for_each(i, &dev->objectBucket[bucket].list) { - /* If there is already one in the list */ - if (i - && list_entry(i, yaffs_Object, - hashLink)->objectId == n) { - found = 0; - } - } - } - } - - - return n; -} - -static void yaffs_HashObject(yaffs_Object * in) -{ - int bucket = yaffs_HashFunction(in->objectId); - yaffs_Device *dev = in->myDev; - - list_add(&in->hashLink, &dev->objectBucket[bucket].list); - dev->objectBucket[bucket].count++; - -} - -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number) -{ - int bucket = yaffs_HashFunction(number); - struct list_head *i; - yaffs_Object *in; - - list_for_each(i, &dev->objectBucket[bucket].list) { - /* Look if it is in the list */ - if (i) { - in = list_entry(i, yaffs_Object, hashLink); - if (in->objectId == number) { -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - /* Don't tell the VFS about this one if it is defered free */ - if (in->deferedFree) - return NULL; -#endif -#endif - return in; - } - } - } - - return NULL; -} - -yaffs_Object *yaffs_CreateNewObject(yaffs_Device * dev, int number, - yaffs_ObjectType type) -{ - - yaffs_Object *theObject; - yaffs_Tnode *tn = NULL; - - if (number < 0) { - number = yaffs_CreateNewObjectNumber(dev); - } - - theObject = yaffs_AllocateEmptyObject(dev); - if(!theObject) - return NULL; - - if(type == YAFFS_OBJECT_TYPE_FILE){ - tn = yaffs_GetTnode(dev); - if(!tn){ - yaffs_FreeObject(theObject); - return NULL; - } - } - - - - if (theObject) { - theObject->fake = 0; - theObject->renameAllowed = 1; - theObject->unlinkAllowed = 1; - theObject->objectId = number; - yaffs_HashObject(theObject); - theObject->variantType = type; -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(theObject->win_atime); - theObject->win_ctime[0] = theObject->win_mtime[0] = - theObject->win_atime[0]; - theObject->win_ctime[1] = theObject->win_mtime[1] = - theObject->win_atime[1]; - -#else - - theObject->yst_atime = theObject->yst_mtime = - theObject->yst_ctime = Y_CURRENT_TIME; -#endif - switch (type) { - case YAFFS_OBJECT_TYPE_FILE: - theObject->variant.fileVariant.fileSize = 0; - theObject->variant.fileVariant.scannedFileSize = 0; - theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */ - theObject->variant.fileVariant.topLevel = 0; - theObject->variant.fileVariant.top = tn; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - INIT_LIST_HEAD(&theObject->variant.directoryVariant. - children); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_SPECIAL: - /* No action required */ - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* todo this should not happen */ - break; - } - } - - return theObject; -} - -static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device * dev, - int number, - yaffs_ObjectType type) -{ - yaffs_Object *theObject = NULL; - - if (number > 0) { - theObject = yaffs_FindObjectByNumber(dev, number); - } - - if (!theObject) { - theObject = yaffs_CreateNewObject(dev, number, type); - } - - return theObject; - -} - - -static YCHAR *yaffs_CloneString(const YCHAR * str) -{ - YCHAR *newStr = NULL; - - if (str && *str) { - newStr = YMALLOC((yaffs_strlen(str) + 1) * sizeof(YCHAR)); - if(newStr) - yaffs_strcpy(newStr, str); - } - - return newStr; - -} - -/* - * Mknod (create) a new object. - * equivalentObject only has meaning for a hard link; - * aliasString only has meaning for a sumlink. - * rdev only has meaning for devices (a subset of special objects) - */ - -static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, - yaffs_Object * parent, - const YCHAR * name, - __u32 mode, - __u32 uid, - __u32 gid, - yaffs_Object * equivalentObject, - const YCHAR * aliasString, __u32 rdev) -{ - yaffs_Object *in; - YCHAR *str = NULL; - - yaffs_Device *dev = parent->myDev; - - /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/ - if (yaffs_FindObjectByName(parent, name)) { - return NULL; - } - - in = yaffs_CreateNewObject(dev, -1, type); - - if(type == YAFFS_OBJECT_TYPE_SYMLINK){ - str = yaffs_CloneString(aliasString); - if(!str){ - yaffs_FreeObject(in); - return NULL; - } - } - - - - if (in) { - in->chunkId = -1; - in->valid = 1; - in->variantType = type; - - in->yst_mode = mode; - -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(in->win_atime); - in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0]; - in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1]; - -#else - in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME; - - in->yst_rdev = rdev; - in->yst_uid = uid; - in->yst_gid = gid; -#endif - in->nDataChunks = 0; - - yaffs_SetObjectName(in, name); - in->dirty = 1; - - yaffs_AddObjectToDirectory(parent, in); - - in->myDev = parent->myDev; - - switch (type) { - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant.alias = str; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardLinkVariant.equivalentObject = - equivalentObject; - in->variant.hardLinkVariant.equivalentObjectId = - equivalentObject->objectId; - list_add(&in->hardLinks, &equivalentObject->hardLinks); - break; - case YAFFS_OBJECT_TYPE_FILE: - case YAFFS_OBJECT_TYPE_DIRECTORY: - case YAFFS_OBJECT_TYPE_SPECIAL: - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* do nothing */ - break; - } - - if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) { - /* Could not create the object header, fail the creation */ - yaffs_DestroyObject(in); - in = NULL; - } - - } - - return in; -} - -yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid) -{ - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, - uid, gid, NULL, NULL, 0); -} - -yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid) -{ - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, - mode, uid, gid, NULL, NULL, 0); -} - -yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, __u32 rdev) -{ - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, - uid, gid, NULL, NULL, rdev); -} - -yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, - const YCHAR * alias) -{ - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, - uid, gid, NULL, alias, 0); -} - -/* yaffs_Link returns the object id of the equivalent object.*/ -yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name, - yaffs_Object * equivalentObject) -{ - /* Get the real object in case we were fed a hard link as an equivalent object */ - equivalentObject = yaffs_GetEquivalentObject(equivalentObject); - - if (yaffs_MknodObject - (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0, - equivalentObject, NULL, 0)) { - return equivalentObject; - } else { - return NULL; - } - -} - -static int yaffs_ChangeObjectName(yaffs_Object * obj, yaffs_Object * newDir, - const YCHAR * newName, int force, int shadows) -{ - int unlinkOp; - int deleteOp; - - yaffs_Object *existingTarget; - - if (newDir == NULL) { - newDir = obj->parent; /* use the old directory */ - } - - if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragendy: yaffs_ChangeObjectName: newDir is not a directory" - TENDSTR))); - YBUG(); - } - - /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */ - if (obj->myDev->isYaffs2) { - unlinkOp = (newDir == obj->myDev->unlinkedDir); - } else { - unlinkOp = (newDir == obj->myDev->unlinkedDir - && obj->variantType == YAFFS_OBJECT_TYPE_FILE); - } - - deleteOp = (newDir == obj->myDev->deletedDir); - - existingTarget = yaffs_FindObjectByName(newDir, newName); - - /* If the object is a file going into the unlinked directory, - * then it is OK to just stuff it in since duplicate names are allowed. - * else only proceed if the new name does not exist and if we're putting - * it into a directory. - */ - if ((unlinkOp || - deleteOp || - force || - (shadows > 0) || - !existingTarget) && - newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_SetObjectName(obj, newName); - obj->dirty = 1; - - yaffs_AddObjectToDirectory(newDir, obj); - - if (unlinkOp) - obj->unlinked = 1; - - /* If it is a deletion then we mark it as a shrink for gc purposes. */ - if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows)>= 0) - return YAFFS_OK; - } - - return YAFFS_FAIL; -} - -int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, - yaffs_Object * newDir, const YCHAR * newName) -{ - yaffs_Object *obj; - yaffs_Object *existingTarget; - int force = 0; - -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - /* Special case for case insemsitive systems (eg. WinCE). - * While look-up is case insensitive, the name isn't. - * Therefore we might want to change x.txt to X.txt - */ - if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0) { - force = 1; - } -#endif - - obj = yaffs_FindObjectByName(oldDir, oldName); - /* Check new name to long. */ - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK && - yaffs_strlen(newName) > YAFFS_MAX_ALIAS_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; - else if (obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK && - yaffs_strlen(newName) > YAFFS_MAX_NAME_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; - - if (obj && obj->renameAllowed) { - - /* Now do the handling for an existing target, if there is one */ - - existingTarget = yaffs_FindObjectByName(newDir, newName); - if (existingTarget && - existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && - !list_empty(&existingTarget->variant.directoryVariant.children)) { - /* There is a target that is a non-empty directory, so we fail */ - return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ - } else if (existingTarget && existingTarget != obj) { - /* Nuke the target first, using shadowing, - * but only if it isn't the same object - */ - yaffs_ChangeObjectName(obj, newDir, newName, force, - existingTarget->objectId); - yaffs_UnlinkObject(existingTarget); - } - - return yaffs_ChangeObjectName(obj, newDir, newName, 1, 0); - } - return YAFFS_FAIL; -} - -/*------------------------- Block Management and Page Allocation ----------------*/ - -static int yaffs_InitialiseBlocks(yaffs_Device * dev) -{ - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - - dev->blockInfo = NULL; - dev->chunkBits = NULL; - - dev->allocationBlock = -1; /* force it to get a new one */ - - /* If the first allocation strategy fails, thry the alternate one */ - dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo)); - if(!dev->blockInfo){ - dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo)); - dev->blockInfoAlt = 1; - } - else - dev->blockInfoAlt = 0; - - if(dev->blockInfo){ - - /* Set up dynamic blockinfo stuff. */ - dev->chunkBitmapStride = (dev->nChunksPerBlock + 7) / 8; /* round up bytes */ - dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks); - if(!dev->chunkBits){ - dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks); - dev->chunkBitsAlt = 1; - } - else - dev->chunkBitsAlt = 0; - } - - if (dev->blockInfo && dev->chunkBits) { - memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo)); - memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks); - return YAFFS_OK; - } - - return YAFFS_FAIL; - -} - -static void yaffs_DeinitialiseBlocks(yaffs_Device * dev) -{ - if(dev->blockInfoAlt && dev->blockInfo) - YFREE_ALT(dev->blockInfo); - else if(dev->blockInfo) - YFREE(dev->blockInfo); - - dev->blockInfoAlt = 0; - - dev->blockInfo = NULL; - - if(dev->chunkBitsAlt && dev->chunkBits) - YFREE_ALT(dev->chunkBits); - else if(dev->chunkBits) - YFREE(dev->chunkBits); - dev->chunkBitsAlt = 0; - dev->chunkBits = NULL; -} - -static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device * dev, - yaffs_BlockInfo * bi) -{ - int i; - __u32 seq; - yaffs_BlockInfo *b; - - if (!dev->isYaffs2) - return 1; /* disqualification only applies to yaffs2. */ - - if (!bi->hasShrinkHeader) - return 1; /* can gc */ - - /* Find the oldest dirty sequence number if we don't know it and save it - * so we don't have to keep recomputing it. - */ - if (!dev->oldestDirtySequence) { - seq = dev->sequenceNumber; - - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; - i++) { - b = yaffs_GetBlockInfo(dev, i); - if (b->blockState == YAFFS_BLOCK_STATE_FULL && - (b->pagesInUse - b->softDeletions) < - dev->nChunksPerBlock && b->sequenceNumber < seq) { - seq = b->sequenceNumber; - } - } - dev->oldestDirtySequence = seq; - } - - /* Can't do gc of this block if there are any blocks older than this one that have - * discarded pages. - */ - return (bi->sequenceNumber <= dev->oldestDirtySequence); - -} - -/* FindDiretiestBlock is used to select the dirtiest block (or close enough) - * for garbage collection. - */ - -static int yaffs_FindBlockForGarbageCollection(yaffs_Device * dev, - int aggressive) -{ - - int b = dev->currentDirtyChecker; - - int i; - int iterations; - int dirtiest = -1; - int pagesInUse = 0; - int prioritised=0; - yaffs_BlockInfo *bi; - int pendingPrioritisedExist = 0; - - /* First let's see if we need to grab a prioritised block */ - if(dev->hasPendingPrioritisedGCs){ - for(i = dev->internalStartBlock; i < dev->internalEndBlock && !prioritised; i++){ - - bi = yaffs_GetBlockInfo(dev, i); - //yaffs_VerifyBlock(dev,bi,i); - - if(bi->gcPrioritise) { - pendingPrioritisedExist = 1; - if(bi->blockState == YAFFS_BLOCK_STATE_FULL && - yaffs_BlockNotDisqualifiedFromGC(dev, bi)){ - pagesInUse = (bi->pagesInUse - bi->softDeletions); - dirtiest = i; - prioritised = 1; - aggressive = 1; /* Fool the non-aggressive skip logiv below */ - } - } - } - - if(!pendingPrioritisedExist) /* None found, so we can clear this */ - dev->hasPendingPrioritisedGCs = 0; - } - - /* If we're doing aggressive GC then we are happy to take a less-dirty block, and - * search harder. - * else (we're doing a leasurely gc), then we only bother to do this if the - * block has only a few pages in use. - */ - - dev->nonAggressiveSkip--; - - if (!aggressive && (dev->nonAggressiveSkip > 0)) { - return -1; - } - - if(!prioritised) - pagesInUse = - (aggressive) ? dev->nChunksPerBlock : YAFFS_PASSIVE_GC_CHUNKS + 1; - - if (aggressive) { - iterations = - dev->internalEndBlock - dev->internalStartBlock + 1; - } else { - iterations = - dev->internalEndBlock - dev->internalStartBlock + 1; - iterations = iterations / 16; - if (iterations > 200) { - iterations = 200; - } - } - - for (i = 0; i <= iterations && pagesInUse > 0 && !prioritised; i++) { - b++; - if (b < dev->internalStartBlock || b > dev->internalEndBlock) { - b = dev->internalStartBlock; - } - - if (b < dev->internalStartBlock || b > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> Block %d is not valid" TENDSTR), b)); - YBUG(); - } - - bi = yaffs_GetBlockInfo(dev, b); - -#if 0 - if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) { - dirtiest = b; - pagesInUse = 0; - } - else -#endif - - if (bi->blockState == YAFFS_BLOCK_STATE_FULL && - (bi->pagesInUse - bi->softDeletions) < pagesInUse && - yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { - dirtiest = b; - pagesInUse = (bi->pagesInUse - bi->softDeletions); - } - } - - dev->currentDirtyChecker = b; - - if (dirtiest > 0) { - T(YAFFS_TRACE_GC, - (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), dirtiest, - dev->nChunksPerBlock - pagesInUse,prioritised)); - } - - dev->oldestDirtySequence = 0; - - if (dirtiest > 0) { - dev->nonAggressiveSkip = 4; - } - - return dirtiest; -} - -static void yaffs_BlockBecameDirty(yaffs_Device * dev, int blockNo) -{ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo); - - int erasedOk = 0; - - /* If the block is still healthy erase it and mark as clean. - * If the block has had a data failure, then retire it. - */ - - T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, - (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR), - blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : "")); - - bi->blockState = YAFFS_BLOCK_STATE_DIRTY; - - if (!bi->needsRetiring) { - yaffs_InvalidateCheckpoint(dev); - erasedOk = yaffs_EraseBlockInNAND(dev, blockNo); - if (!erasedOk) { - dev->nErasureFailures++; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Erasure failed %d" TENDSTR), blockNo)); - } - } - - if (erasedOk && - ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) { - int i; - for (i = 0; i < dev->nChunksPerBlock; i++) { - if (!yaffs_CheckChunkErased - (dev, blockNo * dev->nChunksPerBlock + i)) { - T(YAFFS_TRACE_ERROR, - (TSTR - (">>Block %d erasure supposedly OK, but chunk %d not erased" - TENDSTR), blockNo, i)); - } - } - } - - if (erasedOk) { - /* Clean it up... */ - bi->blockState = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - bi->pagesInUse = 0; - bi->softDeletions = 0; - bi->hasShrinkHeader = 0; - bi->skipErasedCheck = 1; /* This is clean, so no need to check */ - bi->gcPrioritise = 0; - yaffs_ClearChunkBits(dev, blockNo); - - T(YAFFS_TRACE_ERASE, - (TSTR("Erased block %d" TENDSTR), blockNo)); - } else { - dev->nFreeChunks -= dev->nChunksPerBlock; /* We lost a block of free space */ - - yaffs_RetireBlock(dev, blockNo); - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Block %d retired" TENDSTR), blockNo)); - } -} - -static int yaffs_FindBlockForAllocation(yaffs_Device * dev) -{ - int i; - - yaffs_BlockInfo *bi; - - if (dev->nErasedBlocks < 1) { - /* Hoosterman we've got a problem. - * Can't get space to gc - */ - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no more eraased blocks" TENDSTR))); - - return -1; - } - - /* Find an empty block. */ - - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - dev->allocationBlockFinder++; - if (dev->allocationBlockFinder < dev->internalStartBlock - || dev->allocationBlockFinder > dev->internalEndBlock) { - dev->allocationBlockFinder = dev->internalStartBlock; - } - - bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder); - - if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) { - bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING; - dev->sequenceNumber++; - bi->sequenceNumber = dev->sequenceNumber; - dev->nErasedBlocks--; - T(YAFFS_TRACE_ALLOCATE, - (TSTR("Allocated block %d, seq %d, %d left" TENDSTR), - dev->allocationBlockFinder, dev->sequenceNumber, - dev->nErasedBlocks)); - return dev->allocationBlockFinder; - } - } - - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs tragedy: no more eraased blocks, but there should have been %d" - TENDSTR), dev->nErasedBlocks)); - - return -1; -} - - -// Check if there's space to allocate... -// Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()? -static int yaffs_CheckSpaceForAllocation(yaffs_Device * dev) -{ - int reservedChunks; - int reservedBlocks = dev->nReservedBlocks; - int checkpointBlocks; - - checkpointBlocks = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint; - if(checkpointBlocks < 0) - checkpointBlocks = 0; - - reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->nChunksPerBlock); - - return (dev->nFreeChunks > reservedChunks); -} - -static int yaffs_AllocateChunk(yaffs_Device * dev, int useReserve, yaffs_BlockInfo **blockUsedPtr) -{ - int retVal; - yaffs_BlockInfo *bi; - - if (dev->allocationBlock < 0) { - /* Get next block to allocate off */ - dev->allocationBlock = yaffs_FindBlockForAllocation(dev); - dev->allocationPage = 0; - } - - if (!useReserve && !yaffs_CheckSpaceForAllocation(dev)) { - /* Not enough space to allocate unless we're allowed to use the reserve. */ - return -1; - } - - if (dev->nErasedBlocks < dev->nReservedBlocks - && dev->allocationPage == 0) { - T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR))); - } - - /* Next page please.... */ - if (dev->allocationBlock >= 0) { - bi = yaffs_GetBlockInfo(dev, dev->allocationBlock); - - retVal = (dev->allocationBlock * dev->nChunksPerBlock) + - dev->allocationPage; - bi->pagesInUse++; - yaffs_SetChunkBit(dev, dev->allocationBlock, - dev->allocationPage); - - dev->allocationPage++; - - dev->nFreeChunks--; - - /* If the block is full set the state to full */ - if (dev->allocationPage >= dev->nChunksPerBlock) { - bi->blockState = YAFFS_BLOCK_STATE_FULL; - dev->allocationBlock = -1; - } - - if(blockUsedPtr) - *blockUsedPtr = bi; - - return retVal; - } - - T(YAFFS_TRACE_ERROR, - (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); - - return -1; -} - -static int yaffs_GetErasedChunks(yaffs_Device * dev) -{ - int n; - - n = dev->nErasedBlocks * dev->nChunksPerBlock; - - if (dev->allocationBlock > 0) { - n += (dev->nChunksPerBlock - dev->allocationPage); - } - - return n; - -} - -static int yaffs_GarbageCollectBlock(yaffs_Device * dev, int block) -{ - int oldChunk; - int newChunk; - int chunkInBlock; - int markNAND; - int retVal = YAFFS_OK; - int cleanups = 0; - int i; - int isCheckpointBlock; - int matchingChunk; - - int chunksBefore = yaffs_GetErasedChunks(dev); - int chunksAfter; - - yaffs_ExtendedTags tags; - - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block); - - yaffs_Object *object; - - isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT); - - bi->blockState = YAFFS_BLOCK_STATE_COLLECTING; - - T(YAFFS_TRACE_TRACING, - (TSTR("Collecting block %d, in use %d, shrink %d, " TENDSTR), block, - bi->pagesInUse, bi->hasShrinkHeader)); - - /*yaffs_VerifyFreeChunks(dev); */ - - bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */ - - /* Take off the number of soft deleted entries because - * they're going to get really deleted during GC. - */ - dev->nFreeChunks -= bi->softDeletions; - - dev->isDoingGC = 1; - - if (isCheckpointBlock || - !yaffs_StillSomeChunkBits(dev, block)) { - T(YAFFS_TRACE_TRACING, - (TSTR - ("Collecting block %d that has no chunks in use" TENDSTR), - block)); - yaffs_BlockBecameDirty(dev, block); - } else { - - __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); - - yaffs_VerifyBlock(dev,bi,block); - - for (chunkInBlock = 0, oldChunk = block * dev->nChunksPerBlock; - chunkInBlock < dev->nChunksPerBlock - && yaffs_StillSomeChunkBits(dev, block); - chunkInBlock++, oldChunk++) { - if (yaffs_CheckChunkBit(dev, block, chunkInBlock)) { - - /* This page is in use and might need to be copied off */ - - markNAND = 1; - - yaffs_InitialiseTags(&tags); - - yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk, - buffer, &tags); - - object = - yaffs_FindObjectByNumber(dev, - tags.objectId); - - T(YAFFS_TRACE_GC_DETAIL, - (TSTR - ("Collecting page %d, %d %d %d " TENDSTR), - chunkInBlock, tags.objectId, tags.chunkId, - tags.byteCount)); - - if(object && !yaffs_SkipVerification(dev)){ - if(tags.chunkId == 0) - matchingChunk = object->chunkId; - else if(object->softDeleted) - matchingChunk = oldChunk; /* Defeat the test */ - else - matchingChunk = yaffs_FindChunkInFile(object,tags.chunkId,NULL); - - if(oldChunk != matchingChunk) - T(YAFFS_TRACE_ERROR, - (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR), - oldChunk,matchingChunk,tags.objectId, tags.chunkId)); - - } - - if (!object) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("page %d in gc has no object: %d %d %d " - TENDSTR), oldChunk, - tags.objectId, tags.chunkId, tags.byteCount)); - } - - if (object && object->deleted - && tags.chunkId != 0) { - /* Data chunk in a deleted file, throw it away - * It's a soft deleted data chunk, - * No need to copy this, just forget about it and - * fix up the object. - */ - - object->nDataChunks--; - - if (object->nDataChunks <= 0) { - /* remeber to clean up the object */ - dev->gcCleanupList[cleanups] = - tags.objectId; - cleanups++; - } - markNAND = 0; - } else if (0 - /* Todo object && object->deleted && object->nDataChunks == 0 */ - ) { - /* Deleted object header with no data chunks. - * Can be discarded and the file deleted. - */ - object->chunkId = 0; - yaffs_FreeTnode(object->myDev, - object->variant. - fileVariant.top); - object->variant.fileVariant.top = NULL; - yaffs_DoGenericObjectDeletion(object); - - } else if (object) { - /* It's either a data chunk in a live file or - * an ObjectHeader, so we're interested in it. - * NB Need to keep the ObjectHeaders of deleted files - * until the whole file has been deleted off - */ - tags.serialNumber++; - - dev->nGCCopies++; - - if (tags.chunkId == 0) { - /* It is an object Id, - * We need to nuke the shrinkheader flags first - * We no longer want the shrinkHeader flag since its work is done - * and if it is left in place it will mess up scanning. - * Also, clear out any shadowing stuff - */ - - yaffs_ObjectHeader *oh; - oh = (yaffs_ObjectHeader *)buffer; - oh->isShrink = 0; - oh->shadowsObject = -1; - tags.extraShadows = 0; - tags.extraIsShrinkHeader = 0; - - yaffs_VerifyObjectHeader(object,oh,&tags,1); - } - - newChunk = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1); - - if (newChunk < 0) { - retVal = YAFFS_FAIL; - } else { - - /* Ok, now fix up the Tnodes etc. */ - - if (tags.chunkId == 0) { - /* It's a header */ - object->chunkId = newChunk; - object->serial = tags.serialNumber; - } else { - /* It's a data chunk */ - yaffs_PutChunkIntoFile - (object, - tags.chunkId, - newChunk, 0); - } - } - } - - yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__); - - } - } - - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); - - - /* Do any required cleanups */ - for (i = 0; i < cleanups; i++) { - /* Time to delete the file too */ - object = - yaffs_FindObjectByNumber(dev, - dev->gcCleanupList[i]); - if (object) { - yaffs_FreeTnode(dev, - object->variant.fileVariant. - top); - object->variant.fileVariant.top = NULL; - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: About to finally delete object %d" - TENDSTR), object->objectId)); - yaffs_DoGenericObjectDeletion(object); - object->myDev->nDeletedFiles--; - } - - } - - } - - yaffs_VerifyCollectedBlock(dev,bi,block); - - if (chunksBefore >= (chunksAfter = yaffs_GetErasedChunks(dev))) { - T(YAFFS_TRACE_GC, - (TSTR - ("gc did not increase free chunks before %d after %d" - TENDSTR), chunksBefore, chunksAfter)); - } - - dev->isDoingGC = 0; - - return retVal; -} - -/* New garbage collector - * If we're very low on erased blocks then we do aggressive garbage collection - * otherwise we do "leasurely" garbage collection. - * Aggressive gc looks further (whole array) and will accept less dirty blocks. - * Passive gc only inspects smaller areas and will only accept more dirty blocks. - * - * The idea is to help clear out space in a more spread-out manner. - * Dunno if it really does anything useful. - */ -static int yaffs_CheckGarbageCollection(yaffs_Device * dev) -{ - int block; - int aggressive; - int gcOk = YAFFS_OK; - int maxTries = 0; - - int checkpointBlockAdjust; - - if (dev->isDoingGC) { - /* Bail out so we don't get recursive gc */ - return YAFFS_OK; - } - - /* This loop should pass the first time. - * We'll only see looping here if the erase of the collected block fails. - */ - - do { - maxTries++; - - checkpointBlockAdjust = (dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint); - if(checkpointBlockAdjust < 0) - checkpointBlockAdjust = 0; - - if (dev->nErasedBlocks < (dev->nReservedBlocks + checkpointBlockAdjust + 2)) { - /* We need a block soon...*/ - aggressive = 1; - } else { - /* We're in no hurry */ - aggressive = 0; - } - - block = yaffs_FindBlockForGarbageCollection(dev, aggressive); - - if (block > 0) { - dev->garbageCollections++; - if (!aggressive) { - dev->passiveGarbageCollections++; - } - - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR), - dev->nErasedBlocks, aggressive)); - - gcOk = yaffs_GarbageCollectBlock(dev, block); - } - - if (dev->nErasedBlocks < (dev->nReservedBlocks) && block > 0) { - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" - TENDSTR), dev->nErasedBlocks, maxTries, block)); - } - } while ((dev->nErasedBlocks < dev->nReservedBlocks) && (block > 0) - && (maxTries < 2)); - - return aggressive ? gcOk : YAFFS_OK; -} - -/*------------------------- TAGS --------------------------------*/ - -static int yaffs_TagsMatch(const yaffs_ExtendedTags * tags, int objectId, - int chunkInObject) -{ - return (tags->chunkId == chunkInObject && - tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0; - -} - - -/*-------------------- Data file manipulation -----------------*/ - -static int yaffs_FindChunkInFile(yaffs_Object * in, int chunkInInode, - yaffs_ExtendedTags * tags) -{ - /*Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_Tnode *tn; - int theChunk = -1; - yaffs_ExtendedTags localTags; - int retVal = -1; - - yaffs_Device *dev = in->myDev; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; - } - - tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); - - if (tn) { - theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); - - retVal = - yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, - chunkInInode); - } - return retVal; -} - -static int yaffs_FindAndDeleteChunkInFile(yaffs_Object * in, int chunkInInode, - yaffs_ExtendedTags * tags) -{ - /* Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_Tnode *tn; - int theChunk = -1; - yaffs_ExtendedTags localTags; - - yaffs_Device *dev = in->myDev; - int retVal = -1; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; - } - - tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); - - if (tn) { - - theChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); - - retVal = - yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, - chunkInInode); - - /* Delete the entry in the filestructure (if found) */ - if (retVal != -1) { - yaffs_PutLevel0Tnode(dev,tn,chunkInInode,0); - } - } else { - /*T(("No level 0 found for %d\n", chunkInInode)); */ - } - - if (retVal == -1) { - /* T(("Could not find %d to delete\n",chunkInInode)); */ - } - return retVal; -} - -#ifdef YAFFS_PARANOID - -static int yaffs_CheckFileSanity(yaffs_Object * in) -{ - int chunk; - int nChunks; - int fSize; - int failed = 0; - int objId; - yaffs_Tnode *tn; - yaffs_Tags localTags; - yaffs_Tags *tags = &localTags; - int theChunk; - int chunkDeleted; - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - /* T(("Object not a file\n")); */ - return YAFFS_FAIL; - } - - objId = in->objectId; - fSize = in->variant.fileVariant.fileSize; - nChunks = - (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk; - - for (chunk = 1; chunk <= nChunks; chunk++) { - tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant, - chunk); - - if (tn) { - - theChunk = yaffs_GetChunkGroupBase(dev,tn,chunk); - - if (yaffs_CheckChunkBits - (dev, theChunk / dev->nChunksPerBlock, - theChunk % dev->nChunksPerBlock)) { - - yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk, - tags, - &chunkDeleted); - if (yaffs_TagsMatch - (tags, in->objectId, chunk, chunkDeleted)) { - /* found it; */ - - } - } else { - - failed = 1; - } - - } else { - /* T(("No level 0 found for %d\n", chunk)); */ - } - } - - return failed ? YAFFS_FAIL : YAFFS_OK; -} - -#endif - -static int yaffs_PutChunkIntoFile(yaffs_Object * in, int chunkInInode, - int chunkInNAND, int inScan) -{ - /* NB inScan is zero unless scanning. - * For forward scanning, inScan is > 0; - * for backward scanning inScan is < 0 - */ - - yaffs_Tnode *tn; - yaffs_Device *dev = in->myDev; - int existingChunk; - yaffs_ExtendedTags existingTags; - yaffs_ExtendedTags newTags; - unsigned existingSerial, newSerial; - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - /* Just ignore an attempt at putting a chunk into a non-file during scanning - * If it is not during Scanning then something went wrong! - */ - if (!inScan) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy:attempt to put data chunk into a non-file" - TENDSTR))); - YBUG(); - } - - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); - return YAFFS_OK; - } - - tn = yaffs_AddOrFindLevel0Tnode(dev, - &in->variant.fileVariant, - chunkInInode, - NULL); - if (!tn) { - return YAFFS_FAIL; - } - - existingChunk = yaffs_GetChunkGroupBase(dev,tn,chunkInInode); - - if (inScan != 0) { - /* If we're scanning then we need to test for duplicates - * NB This does not need to be efficient since it should only ever - * happen when the power fails during a write, then only one - * chunk should ever be affected. - * - * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO - * Update: For backward scanning we don't need to re-read tags so this is quite cheap. - */ - - if (existingChunk != 0) { - /* NB Right now existing chunk will not be real chunkId if the device >= 32MB - * thus we have to do a FindChunkInFile to get the real chunk id. - * - * We have a duplicate now we need to decide which one to use: - * - * Backwards scanning YAFFS2: The old one is what we use, dump the new one. - * Forward scanning YAFFS2: The new one is what we use, dump the old one. - * YAFFS1: Get both sets of tags and compare serial numbers. - */ - - if (inScan > 0) { - /* Only do this for forward scanning */ - yaffs_ReadChunkWithTagsFromNAND(dev, - chunkInNAND, - NULL, &newTags); - - /* Do a proper find */ - existingChunk = - yaffs_FindChunkInFile(in, chunkInInode, - &existingTags); - } - - if (existingChunk <= 0) { - /*Hoosterman - how did this happen? */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: existing chunk < 0 in scan" - TENDSTR))); - - } - - /* NB The deleted flags should be false, otherwise the chunks will - * not be loaded during a scan - */ - - newSerial = newTags.serialNumber; - existingSerial = existingTags.serialNumber; - - if ((inScan > 0) && - (in->myDev->isYaffs2 || - existingChunk <= 0 || - ((existingSerial + 1) & 3) == newSerial)) { - /* Forward scanning. - * Use new - * Delete the old one and drop through to update the tnode - */ - yaffs_DeleteChunk(dev, existingChunk, 1, - __LINE__); - } else { - /* Backward scanning or we want to use the existing one - * Use existing. - * Delete the new one and return early so that the tnode isn't changed - */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, - __LINE__); - return YAFFS_OK; - } - } - - } - - if (existingChunk == 0) { - in->nDataChunks++; - } - - yaffs_PutLevel0Tnode(dev,tn,chunkInInode,chunkInNAND); - - return YAFFS_OK; -} - -static int yaffs_ReadChunkDataFromObject(yaffs_Object * in, int chunkInInode, - __u8 * buffer) -{ - int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL); - - if (chunkInNAND >= 0) { - return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND, - buffer,NULL); - } else { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not found zero instead" TENDSTR), - chunkInNAND)); - /* get sane (zero) data if you read a hole */ - memset(buffer, 0, in->myDev->nDataBytesPerChunk); - return 0; - } - -} - -void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn) -{ - int block; - int page; - yaffs_ExtendedTags tags; - yaffs_BlockInfo *bi; - - if (chunkId <= 0) - return; - - - dev->nDeletions++; - block = chunkId / dev->nChunksPerBlock; - page = chunkId % dev->nChunksPerBlock; - - - if(!yaffs_CheckChunkBit(dev,block,page)) - T(YAFFS_TRACE_VERIFY, - (TSTR("Deleting invalid chunk %d"TENDSTR), - chunkId)); - - bi = yaffs_GetBlockInfo(dev, block); - - T(YAFFS_TRACE_DELETION, - (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId)); - - if (markNAND && - bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->isYaffs2) { - - yaffs_InitialiseTags(&tags); - - tags.chunkDeleted = 1; - - yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags); - yaffs_HandleUpdateChunk(dev, chunkId, &tags); - } else { - dev->nUnmarkedDeletions++; - } - - /* Pull out of the management area. - * If the whole block became dirty, this will kick off an erasure. - */ - if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || - bi->blockState == YAFFS_BLOCK_STATE_FULL || - bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) { - dev->nFreeChunks++; - - yaffs_ClearChunkBit(dev, block, page); - - bi->pagesInUse--; - - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING && - bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - yaffs_BlockBecameDirty(dev, block); - } - - } else { - /* T(("Bad news deleting chunk %d\n",chunkId)); */ - } - -} - -static int yaffs_WriteChunkDataToObject(yaffs_Object * in, int chunkInInode, - const __u8 * buffer, int nBytes, - int useReserve) -{ - /* Find old chunk Need to do this to get serial number - * Write new one and patch into tree. - * Invalidate old tags. - */ - - int prevChunkId; - yaffs_ExtendedTags prevTags; - - int newChunkId; - yaffs_ExtendedTags newTags; - - yaffs_Device *dev = in->myDev; - - yaffs_CheckGarbageCollection(dev); - - /* Get the previous chunk at this location in the file if it exists */ - prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags); - - /* Set up new tags */ - yaffs_InitialiseTags(&newTags); - - newTags.chunkId = chunkInInode; - newTags.objectId = in->objectId; - newTags.serialNumber = - (prevChunkId >= 0) ? prevTags.serialNumber + 1 : 1; - newTags.byteCount = nBytes; - - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - useReserve); - - if (newChunkId >= 0) { - yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0); - - if (prevChunkId >= 0) { - yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__); - - } - - yaffs_CheckFileSanity(in); - } - return newChunkId; - -} - -/* UpdateObjectHeader updates the header on NAND for an object. - * If name is not NULL, then that new name is used. - */ -int yaffs_UpdateObjectHeader(yaffs_Object * in, const YCHAR * name, int force, - int isShrink, int shadows) -{ - - yaffs_BlockInfo *bi; - - yaffs_Device *dev = in->myDev; - - int prevChunkId; - int retVal = 0; - - int newChunkId; - yaffs_ExtendedTags newTags; - yaffs_ExtendedTags oldTags; - - __u8 *buffer = NULL; - YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1]; - - yaffs_ObjectHeader *oh = NULL; - - yaffs_strcpy(oldName,"silly old name"); - - if (!in->fake || force) { - - yaffs_CheckGarbageCollection(dev); - yaffs_CheckObjectDetailsLoaded(in); - - buffer = yaffs_GetTempBuffer(in->myDev, __LINE__); - oh = (yaffs_ObjectHeader *) buffer; - - prevChunkId = in->chunkId; - - if (prevChunkId >= 0) { - yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId, - buffer, &oldTags); - - yaffs_VerifyObjectHeader(in,oh,&oldTags,0); - - memcpy(oldName, oh->name, sizeof(oh->name)); - } - - memset(buffer, 0xFF, dev->nDataBytesPerChunk); - - oh->type = in->variantType; - oh->yst_mode = in->yst_mode; - oh->shadowsObject = shadows; - -#ifdef CONFIG_YAFFS_WINCE - oh->win_atime[0] = in->win_atime[0]; - oh->win_ctime[0] = in->win_ctime[0]; - oh->win_mtime[0] = in->win_mtime[0]; - oh->win_atime[1] = in->win_atime[1]; - oh->win_ctime[1] = in->win_ctime[1]; - oh->win_mtime[1] = in->win_mtime[1]; -#else - oh->yst_uid = in->yst_uid; - oh->yst_gid = in->yst_gid; - oh->yst_atime = in->yst_atime; - oh->yst_mtime = in->yst_mtime; - oh->yst_ctime = in->yst_ctime; - oh->yst_rdev = in->yst_rdev; -#endif - if (in->parent) { - oh->parentObjectId = in->parent->objectId; - } else { - oh->parentObjectId = 0; - } - - if (name && *name) { - memset(oh->name, 0, sizeof(oh->name)); - yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH); - } else if (prevChunkId>=0) { - memcpy(oh->name, oldName, sizeof(oh->name)); - } else { - memset(oh->name, 0, sizeof(oh->name)); - } - - oh->isShrink = isShrink; - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Should not happen */ - break; - case YAFFS_OBJECT_TYPE_FILE: - oh->fileSize = - (oh->parentObjectId == YAFFS_OBJECTID_DELETED - || oh->parentObjectId == - YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant. - fileVariant.fileSize; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - oh->equivalentObjectId = - in->variant.hardLinkVariant.equivalentObjectId; - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_strncpy(oh->alias, - in->variant.symLinkVariant.alias, - YAFFS_MAX_ALIAS_LENGTH); - oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; - break; - } - - /* Tags */ - yaffs_InitialiseTags(&newTags); - in->serial++; - newTags.chunkId = 0; - newTags.objectId = in->objectId; - newTags.serialNumber = in->serial; - - /* Add extra info for file header */ - - newTags.extraHeaderInfoAvailable = 1; - newTags.extraParentObjectId = oh->parentObjectId; - newTags.extraFileLength = oh->fileSize; - newTags.extraIsShrinkHeader = oh->isShrink; - newTags.extraEquivalentObjectId = oh->equivalentObjectId; - newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0; - newTags.extraObjectType = in->variantType; - - yaffs_VerifyObjectHeader(in,oh,&newTags,1); - - /* Create new chunk in NAND */ - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - (prevChunkId >= 0) ? 1 : 0); - - if (newChunkId >= 0) { - - in->chunkId = newChunkId; - - if (prevChunkId >= 0) { - yaffs_DeleteChunk(dev, prevChunkId, 1, - __LINE__); - } - - if(!yaffs_ObjectHasCachedWriteData(in)) - in->dirty = 0; - - /* If this was a shrink, then mark the block that the chunk lives on */ - if (isShrink) { - bi = yaffs_GetBlockInfo(in->myDev, - newChunkId /in->myDev-> nChunksPerBlock); - bi->hasShrinkHeader = 1; - } - - } - - retVal = newChunkId; - - } - - if (buffer) - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); - - return retVal; -} - -/*------------------------ Short Operations Cache ---------------------------------------- - * In many situations where there is no high level buffering (eg WinCE) a lot of - * reads might be short sequential reads, and a lot of writes may be short - * sequential writes. eg. scanning/writing a jpeg file. - * In these cases, a short read/write cache can provide a huge perfomance benefit - * with dumb-as-a-rock code. - * In Linux, the page cache provides read buffering aand the short op cache provides write - * buffering. - * - * There are a limited number (~10) of cache chunks per device so that we don't - * need a very intelligent search. - */ - -static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj) -{ - yaffs_Device *dev = obj->myDev; - int i; - yaffs_ChunkCache *cache; - int nCaches = obj->myDev->nShortOpCaches; - - for(i = 0; i < nCaches; i++){ - cache = &dev->srCache[i]; - if (cache->object == obj && - cache->dirty) - return 1; - } - - return 0; -} - - -static void yaffs_FlushFilesChunkCache(yaffs_Object * obj) -{ - yaffs_Device *dev = obj->myDev; - int lowest = -99; /* Stop compiler whining. */ - int i; - yaffs_ChunkCache *cache; - int chunkWritten = 0; - int nCaches = obj->myDev->nShortOpCaches; - - if (nCaches > 0) { - do { - cache = NULL; - - /* Find the dirty cache for this object with the lowest chunk id. */ - for (i = 0; i < nCaches; i++) { - if (dev->srCache[i].object == obj && - dev->srCache[i].dirty) { - if (!cache - || dev->srCache[i].chunkId < - lowest) { - cache = &dev->srCache[i]; - lowest = cache->chunkId; - } - } - } - - if (cache && !cache->locked) { - /* Write it out and free it up */ - - chunkWritten = - yaffs_WriteChunkDataToObject(cache->object, - cache->chunkId, - cache->data, - cache->nBytes, - 1); - cache->dirty = 0; - cache->object = NULL; - } - - } while (cache && chunkWritten > 0); - - if (cache) { - /* Hoosterman, disk full while writing cache out. */ - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); - - } - } - -} - -/*yaffs_FlushEntireDeviceCache(dev) - * - * - */ - -void yaffs_FlushEntireDeviceCache(yaffs_Device *dev) -{ - yaffs_Object *obj; - int nCaches = dev->nShortOpCaches; - int i; - - /* Find a dirty object in the cache and flush it... - * until there are no further dirty objects. - */ - do { - obj = NULL; - for( i = 0; i < nCaches && !obj; i++) { - if (dev->srCache[i].object && - dev->srCache[i].dirty) - obj = dev->srCache[i].object; - - } - if(obj) - yaffs_FlushFilesChunkCache(obj); - - } while(obj); - -} - - -/* Grab us a cache chunk for use. - * First look for an empty one. - * Then look for the least recently used non-dirty one. - * Then look for the least recently used dirty one...., flush and look again. - */ -static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device * dev) -{ - int i; - int usage; - int theOne; - - if (dev->nShortOpCaches > 0) { - for (i = 0; i < dev->nShortOpCaches; i++) { - if (!dev->srCache[i].object) - return &dev->srCache[i]; - } - - return NULL; - - theOne = -1; - usage = 0; /* just to stop the compiler grizzling */ - - for (i = 0; i < dev->nShortOpCaches; i++) { - if (!dev->srCache[i].dirty && - ((dev->srCache[i].lastUse < usage && theOne >= 0) || - theOne < 0)) { - usage = dev->srCache[i].lastUse; - theOne = i; - } - } - - - return theOne >= 0 ? &dev->srCache[theOne] : NULL; - } else { - return NULL; - } - -} - -static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device * dev) -{ - yaffs_ChunkCache *cache; - yaffs_Object *theObj; - int usage; - int i; - - if (dev->nShortOpCaches > 0) { - /* Try find a non-dirty one... */ - - cache = yaffs_GrabChunkCacheWorker(dev); - - if (!cache) { - /* They were all dirty, find the last recently used object and flush - * its cache, then find again. - * NB what's here is not very accurate, we actually flush the object - * the last recently used page. - */ - - /* With locking we can't assume we can use entry zero */ - - theObj = NULL; - usage = -1; - cache = NULL; - - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object && - !dev->srCache[i].locked && - (dev->srCache[i].lastUse < usage || !cache)) - { - usage = dev->srCache[i].lastUse; - theObj = dev->srCache[i].object; - cache = &dev->srCache[i]; - } - } - - if (!cache || cache->dirty) { - /* Flush and try again */ - yaffs_FlushFilesChunkCache(theObj); - cache = yaffs_GrabChunkCacheWorker(dev); - } - - } - return cache; - } else - return NULL; - -} - -/* Find a cached chunk */ -static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object * obj, - int chunkId) -{ - yaffs_Device *dev = obj->myDev; - int i; - if (dev->nShortOpCaches > 0) { - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object == obj && - dev->srCache[i].chunkId == chunkId) { - dev->cacheHits++; - - return &dev->srCache[i]; - } - } - } - return NULL; -} - -/* Mark the chunk for the least recently used algorithym */ -static void yaffs_UseChunkCache(yaffs_Device * dev, yaffs_ChunkCache * cache, - int isAWrite) -{ - - if (dev->nShortOpCaches > 0) { - if (dev->srLastUse < 0 || dev->srLastUse > 100000000) { - /* Reset the cache usages */ - int i; - for (i = 1; i < dev->nShortOpCaches; i++) { - dev->srCache[i].lastUse = 0; - } - dev->srLastUse = 0; - } - - dev->srLastUse++; - - cache->lastUse = dev->srLastUse; - - if (isAWrite) { - cache->dirty = 1; - } - } -} - -/* Invalidate a single cache page. - * Do this when a whole page gets written, - * ie the short cache for this page is no longer valid. - */ -static void yaffs_InvalidateChunkCache(yaffs_Object * object, int chunkId) -{ - if (object->myDev->nShortOpCaches > 0) { - yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId); - - if (cache) { - cache->object = NULL; - } - } -} - -/* Invalidate all the cache pages associated with this object - * Do this whenever ther file is deleted or resized. - */ -static void yaffs_InvalidateWholeChunkCache(yaffs_Object * in) -{ - int i; - yaffs_Device *dev = in->myDev; - - if (dev->nShortOpCaches > 0) { - /* Invalidate it. */ - for (i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].object == in) { - dev->srCache[i].object = NULL; - } - } - } -} - -/*--------------------- Checkpointing --------------------*/ - - -static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev,int head) -{ - yaffs_CheckpointValidity cp; - - memset(&cp,0,sizeof(cp)); - - cp.structType = sizeof(cp); - cp.magic = YAFFS_MAGIC; - cp.version = YAFFS_CHECKPOINT_VERSION; - cp.head = (head) ? 1 : 0; - - return (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp))? - 1 : 0; -} - -static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head) -{ - yaffs_CheckpointValidity cp; - int ok; - - ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); - - if(ok) - ok = (cp.structType == sizeof(cp)) && - (cp.magic == YAFFS_MAGIC) && - (cp.version == YAFFS_CHECKPOINT_VERSION) && - (cp.head == ((head) ? 1 : 0)); - return ok ? 1 : 0; -} - -static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp, - yaffs_Device *dev) -{ - cp->nErasedBlocks = dev->nErasedBlocks; - cp->allocationBlock = dev->allocationBlock; - cp->allocationPage = dev->allocationPage; - cp->nFreeChunks = dev->nFreeChunks; - - cp->nDeletedFiles = dev->nDeletedFiles; - cp->nUnlinkedFiles = dev->nUnlinkedFiles; - cp->nBackgroundDeletions = dev->nBackgroundDeletions; - cp->sequenceNumber = dev->sequenceNumber; - cp->oldestDirtySequence = dev->oldestDirtySequence; - -} - -static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev, - yaffs_CheckpointDevice *cp) -{ - dev->nErasedBlocks = cp->nErasedBlocks; - dev->allocationBlock = cp->allocationBlock; - dev->allocationPage = cp->allocationPage; - dev->nFreeChunks = cp->nFreeChunks; - - dev->nDeletedFiles = cp->nDeletedFiles; - dev->nUnlinkedFiles = cp->nUnlinkedFiles; - dev->nBackgroundDeletions = cp->nBackgroundDeletions; - dev->sequenceNumber = cp->sequenceNumber; - dev->oldestDirtySequence = cp->oldestDirtySequence; -} - - -static int yaffs_WriteCheckpointDevice(yaffs_Device *dev) -{ - yaffs_CheckpointDevice cp; - __u32 nBytes; - __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); - - int ok; - - /* Write device runtime values*/ - yaffs_DeviceToCheckpointDevice(&cp,dev); - cp.structType = sizeof(cp); - - ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); - - /* Write block info */ - if(ok) { - nBytes = nBlocks * sizeof(yaffs_BlockInfo); - ok = (yaffs_CheckpointWrite(dev,dev->blockInfo,nBytes) == nBytes); - } - - /* Write chunk bits */ - if(ok) { - nBytes = nBlocks * dev->chunkBitmapStride; - ok = (yaffs_CheckpointWrite(dev,dev->chunkBits,nBytes) == nBytes); - } - return ok ? 1 : 0; - -} - -static int yaffs_ReadCheckpointDevice(yaffs_Device *dev) -{ - yaffs_CheckpointDevice cp; - __u32 nBytes; - __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); - - int ok; - - ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); - if(!ok) - return 0; - - if(cp.structType != sizeof(cp)) - return 0; - - - yaffs_CheckpointDeviceToDevice(dev,&cp); - - nBytes = nBlocks * sizeof(yaffs_BlockInfo); - - ok = (yaffs_CheckpointRead(dev,dev->blockInfo,nBytes) == nBytes); - - if(!ok) - return 0; - nBytes = nBlocks * dev->chunkBitmapStride; - - ok = (yaffs_CheckpointRead(dev,dev->chunkBits,nBytes) == nBytes); - - return ok ? 1 : 0; -} - -static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp, - yaffs_Object *obj) -{ - - cp->objectId = obj->objectId; - cp->parentId = (obj->parent) ? obj->parent->objectId : 0; - cp->chunkId = obj->chunkId; - cp->variantType = obj->variantType; - cp->deleted = obj->deleted; - cp->softDeleted = obj->softDeleted; - cp->unlinked = obj->unlinked; - cp->fake = obj->fake; - cp->renameAllowed = obj->renameAllowed; - cp->unlinkAllowed = obj->unlinkAllowed; - cp->serial = obj->serial; - cp->nDataChunks = obj->nDataChunks; - - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize; - else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) - cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId; -} - -static void yaffs_CheckpointObjectToObject( yaffs_Object *obj,yaffs_CheckpointObject *cp) -{ - - yaffs_Object *parent; - - obj->objectId = cp->objectId; - - if(cp->parentId) - parent = yaffs_FindOrCreateObjectByNumber( - obj->myDev, - cp->parentId, - YAFFS_OBJECT_TYPE_DIRECTORY); - else - parent = NULL; - - if(parent) - yaffs_AddObjectToDirectory(parent, obj); - - obj->chunkId = cp->chunkId; - obj->variantType = cp->variantType; - obj->deleted = cp->deleted; - obj->softDeleted = cp->softDeleted; - obj->unlinked = cp->unlinked; - obj->fake = cp->fake; - obj->renameAllowed = cp->renameAllowed; - obj->unlinkAllowed = cp->unlinkAllowed; - obj->serial = cp->serial; - obj->nDataChunks = cp->nDataChunks; - - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId; - else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) - obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId; - - if(obj->objectId >= YAFFS_NOBJECT_BUCKETS) - obj->lazyLoaded = 1; -} - - - -static int yaffs_CheckpointTnodeWorker(yaffs_Object * in, yaffs_Tnode * tn, - __u32 level, int chunkOffset) -{ - int i; - yaffs_Device *dev = in->myDev; - int ok = 1; - int nTnodeBytes = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - - if (tn) { - if (level > 0) { - - for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++){ - if (tn->internal[i]) { - ok = yaffs_CheckpointTnodeWorker(in, - tn->internal[i], - level - 1, - (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i); - } - } - } else if (level == 0) { - __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS; - /* printf("write tnode at %d\n",baseOffset); */ - ok = (yaffs_CheckpointWrite(dev,&baseOffset,sizeof(baseOffset)) == sizeof(baseOffset)); - if(ok) - ok = (yaffs_CheckpointWrite(dev,tn,nTnodeBytes) == nTnodeBytes); - } - } - - return ok; - -} - -static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj) -{ - __u32 endMarker = ~0; - int ok = 1; - - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE){ - ok = yaffs_CheckpointTnodeWorker(obj, - obj->variant.fileVariant.top, - obj->variant.fileVariant.topLevel, - 0); - if(ok) - ok = (yaffs_CheckpointWrite(obj->myDev,&endMarker,sizeof(endMarker)) == - sizeof(endMarker)); - } - - return ok ? 1 : 0; -} - -static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj) -{ - __u32 baseChunk; - int ok = 1; - yaffs_Device *dev = obj->myDev; - yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant; - yaffs_Tnode *tn; - int nread = 0; - - ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); - - while(ok && (~baseChunk)){ - nread++; - /* Read level 0 tnode */ - - - /* printf("read tnode at %d\n",baseChunk); */ - tn = yaffs_GetTnodeRaw(dev); - if(tn) - ok = (yaffs_CheckpointRead(dev,tn,(dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8) == - (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); - else - ok = 0; - - if(tn && ok){ - ok = yaffs_AddOrFindLevel0Tnode(dev, - fileStructPtr, - baseChunk, - tn) ? 1 : 0; - - } - - if(ok) - ok = (yaffs_CheckpointRead(dev,&baseChunk,sizeof(baseChunk)) == sizeof(baseChunk)); - - } - - T(YAFFS_TRACE_CHECKPOINT,( - TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR), - nread,baseChunk,ok)); - - return ok ? 1 : 0; -} - - -static int yaffs_WriteCheckpointObjects(yaffs_Device *dev) -{ - yaffs_Object *obj; - yaffs_CheckpointObject cp; - int i; - int ok = 1; - struct list_head *lh; - - - /* Iterate through the objects in each hash entry, - * dumping them to the checkpointing stream. - */ - - for(i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++){ - list_for_each(lh, &dev->objectBucket[i].list) { - if (lh) { - obj = list_entry(lh, yaffs_Object, hashLink); - if (!obj->deferedFree) { - yaffs_ObjectToCheckpointObject(&cp,obj); - cp.structType = sizeof(cp); - - T(YAFFS_TRACE_CHECKPOINT,( - TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %x" TENDSTR), - cp.objectId,cp.parentId,cp.variantType,cp.chunkId,(unsigned) obj)); - - ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); - - if(ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE){ - ok = yaffs_WriteCheckpointTnodes(obj); - } - } - } - } - } - - /* Dump end of list */ - memset(&cp,0xFF,sizeof(yaffs_CheckpointObject)); - cp.structType = sizeof(cp); - - if(ok) - ok = (yaffs_CheckpointWrite(dev,&cp,sizeof(cp)) == sizeof(cp)); - - return ok ? 1 : 0; -} - -static int yaffs_ReadCheckpointObjects(yaffs_Device *dev) -{ - yaffs_Object *obj; - yaffs_CheckpointObject cp; - int ok = 1; - int done = 0; - yaffs_Object *hardList = NULL; - - while(ok && !done) { - ok = (yaffs_CheckpointRead(dev,&cp,sizeof(cp)) == sizeof(cp)); - if(cp.structType != sizeof(cp)) { - T(YAFFS_TRACE_CHECKPOINT,(TSTR("struct size %d instead of %d ok %d"TENDSTR), - cp.structType,sizeof(cp),ok)); - ok = 0; - } - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR), - cp.objectId,cp.parentId,cp.variantType,cp.chunkId)); - - if(ok && cp.objectId == ~0) - done = 1; - else if(ok){ - obj = yaffs_FindOrCreateObjectByNumber(dev,cp.objectId, cp.variantType); - if(obj) { - yaffs_CheckpointObjectToObject(obj,&cp); - if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) { - ok = yaffs_ReadCheckpointTnodes(obj); - } else if(obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - obj->hardLinks.next = - (struct list_head *) - hardList; - hardList = obj; - } - - } - } - } - - if(ok) - yaffs_HardlinkFixup(dev,hardList); - - return ok ? 1 : 0; -} - -static int yaffs_WriteCheckpointSum(yaffs_Device *dev) -{ - __u32 checkpointSum; - int ok; - - yaffs_GetCheckpointSum(dev,&checkpointSum); - - ok = (yaffs_CheckpointWrite(dev,&checkpointSum,sizeof(checkpointSum)) == sizeof(checkpointSum)); - - if(!ok) - return 0; - - return 1; -} - -static int yaffs_ReadCheckpointSum(yaffs_Device *dev) -{ - __u32 checkpointSum0; - __u32 checkpointSum1; - int ok; - - yaffs_GetCheckpointSum(dev,&checkpointSum0); - - ok = (yaffs_CheckpointRead(dev,&checkpointSum1,sizeof(checkpointSum1)) == sizeof(checkpointSum1)); - - if(!ok) - return 0; - - if(checkpointSum0 != checkpointSum1) - return 0; - - return 1; -} - - -static int yaffs_WriteCheckpointData(yaffs_Device *dev) -{ - - int ok = 1; - - if(dev->skipCheckpointWrite || !dev->isYaffs2){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint write" TENDSTR))); - ok = 0; - } - - if(ok) - ok = yaffs_CheckpointOpen(dev,1); - - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); - ok = yaffs_WriteCheckpointValidityMarker(dev,1); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint device" TENDSTR))); - ok = yaffs_WriteCheckpointDevice(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint objects" TENDSTR))); - ok = yaffs_WriteCheckpointObjects(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("write checkpoint validity" TENDSTR))); - ok = yaffs_WriteCheckpointValidityMarker(dev,0); - } - - if(ok){ - ok = yaffs_WriteCheckpointSum(dev); - } - - - if(!yaffs_CheckpointClose(dev)) - ok = 0; - - if(ok) - dev->isCheckpointed = 1; - else - dev->isCheckpointed = 0; - - return dev->isCheckpointed; -} - -static int yaffs_ReadCheckpointData(yaffs_Device *dev) -{ - int ok = 1; - - if(dev->skipCheckpointRead || !dev->isYaffs2){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("skipping checkpoint read" TENDSTR))); - ok = 0; - } - - if(ok) - ok = yaffs_CheckpointOpen(dev,0); /* open for read */ - - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); - ok = yaffs_ReadCheckpointValidityMarker(dev,1); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint device" TENDSTR))); - ok = yaffs_ReadCheckpointDevice(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint objects" TENDSTR))); - ok = yaffs_ReadCheckpointObjects(dev); - } - if(ok){ - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint validity" TENDSTR))); - ok = yaffs_ReadCheckpointValidityMarker(dev,0); - } - - if(ok){ - ok = yaffs_ReadCheckpointSum(dev); - T(YAFFS_TRACE_CHECKPOINT,(TSTR("read checkpoint checksum %d" TENDSTR),ok)); - } - - if(!yaffs_CheckpointClose(dev)) - ok = 0; - - if(ok) - dev->isCheckpointed = 1; - else - dev->isCheckpointed = 0; - - return ok ? 1 : 0; - -} - -static void yaffs_InvalidateCheckpoint(yaffs_Device *dev) -{ - if(dev->isCheckpointed || - dev->blocksInCheckpoint > 0){ - dev->isCheckpointed = 0; - yaffs_CheckpointInvalidateStream(dev); - if(dev->superBlock && dev->markSuperBlockDirty) - dev->markSuperBlockDirty(dev->superBlock); - } -} - - -int yaffs_CheckpointSave(yaffs_Device *dev) -{ - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("save entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); - - yaffs_VerifyObjects(dev); - yaffs_VerifyBlocks(dev); - yaffs_VerifyFreeChunks(dev); - - if(!dev->isCheckpointed) { - yaffs_InvalidateCheckpoint(dev); - yaffs_WriteCheckpointData(dev); - } - - T(YAFFS_TRACE_ALWAYS,(TSTR("save exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); - - return dev->isCheckpointed; -} - -int yaffs_CheckpointRestore(yaffs_Device *dev) -{ - int retval; - T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore entry: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); - - retval = yaffs_ReadCheckpointData(dev); - - if(dev->isCheckpointed){ - yaffs_VerifyObjects(dev); - yaffs_VerifyBlocks(dev); - yaffs_VerifyFreeChunks(dev); - } - - T(YAFFS_TRACE_CHECKPOINT,(TSTR("restore exit: isCheckpointed %d"TENDSTR),dev->isCheckpointed)); - - return retval; -} - -/*--------------------- File read/write ------------------------ - * Read and write have very similar structures. - * In general the read/write has three parts to it - * An incomplete chunk to start with (if the read/write is not chunk-aligned) - * Some complete chunks - * An incomplete chunk to end off with - * - * Curve-balls: the first chunk might also be the last chunk. - */ - -int yaffs_ReadDataFromFile(yaffs_Object * in, __u8 * buffer, loff_t offset, - int nBytes) -{ - - __u32 chunk = 0; - __u32 start = 0; - int nToCopy; - int n = nBytes; - int nDone = 0; - yaffs_ChunkCache *cache; - - yaffs_Device *dev; - - dev = in->myDev; - - while (n > 0) { - //chunk = offset / dev->nDataBytesPerChunk + 1; - //start = offset % dev->nDataBytesPerChunk; - yaffs_AddrToChunk(dev,offset,&chunk,&start); - chunk++; - - /* OK now check for the curveball where the start and end are in - * the same chunk. - */ - if ((start + n) < dev->nDataBytesPerChunk) { - nToCopy = n; - } else { - nToCopy = dev->nDataBytesPerChunk - start; - } - - cache = yaffs_FindChunkCache(in, chunk); - - /* If the chunk is already in the cache or it is less than a whole chunk - * then use the cache (if there is caching) - * else bypass the cache. - */ - if (cache || nToCopy != dev->nDataBytesPerChunk) { - if (dev->nShortOpCaches > 0) { - - /* If we can't find the data in the cache, then load it up. */ - - if (!cache) { - cache = yaffs_GrabChunkCache(in->myDev); - cache->object = in; - cache->chunkId = chunk; - cache->dirty = 0; - cache->locked = 0; - yaffs_ReadChunkDataFromObject(in, chunk, - cache-> - data); - cache->nBytes = 0; - } - - yaffs_UseChunkCache(dev, cache, 0); - - cache->locked = 1; - -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, &cache->data[start], nToCopy); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - cache->locked = 0; - } else { - /* Read into the local buffer then copy..*/ - - __u8 *localBuffer = - yaffs_GetTempBuffer(dev, __LINE__); - yaffs_ReadChunkDataFromObject(in, chunk, - localBuffer); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, &localBuffer[start], nToCopy); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - yaffs_ReleaseTempBuffer(dev, localBuffer, - __LINE__); - } - - } else { -#ifdef CONFIG_YAFFS_WINCE - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); - - /* Under WinCE can't do direct transfer. Need to use a local buffer. - * This is because we otherwise screw up WinCE's memory mapper - */ - yaffs_ReadChunkDataFromObject(in, chunk, localBuffer); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(buffer, localBuffer, dev->nDataBytesPerChunk); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -#endif - -#else - /* A full chunk. Read directly into the supplied buffer. */ - yaffs_ReadChunkDataFromObject(in, chunk, buffer); -#endif - } - - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; - - } - - return nDone; -} - -int yaffs_WriteDataToFile(yaffs_Object * in, const __u8 * buffer, loff_t offset, - int nBytes, int writeThrough) -{ - - __u32 chunk = 0; - __u32 start = 0; - int nToCopy; - int n = nBytes; - int nDone = 0; - int nToWriteBack; - int startOfWrite = offset; - int chunkWritten = 0; - int nBytesRead; - - yaffs_Device *dev; - - dev = in->myDev; - - while (n > 0 && chunkWritten >= 0) { - //chunk = offset / dev->nDataBytesPerChunk + 1; - //start = offset % dev->nDataBytesPerChunk; - yaffs_AddrToChunk(dev,offset,&chunk,&start); - chunk++; - - /* OK now check for the curveball where the start and end are in - * the same chunk. - */ - - if ((start + n) < dev->nDataBytesPerChunk) { - nToCopy = n; - - /* Now folks, to calculate how many bytes to write back.... - * If we're overwriting and not writing to then end of file then - * we need to write back as much as was there before. - */ - - nBytesRead = - in->variant.fileVariant.fileSize - - ((chunk - 1) * dev->nDataBytesPerChunk); - - if (nBytesRead > dev->nDataBytesPerChunk) { - nBytesRead = dev->nDataBytesPerChunk; - } - - nToWriteBack = - (nBytesRead > - (start + n)) ? nBytesRead : (start + n); - - } else { - nToCopy = dev->nDataBytesPerChunk - start; - nToWriteBack = dev->nDataBytesPerChunk; - } - - if (nToCopy != dev->nDataBytesPerChunk) { - /* An incomplete start or end chunk (or maybe both start and end chunk) */ - if (dev->nShortOpCaches > 0) { - yaffs_ChunkCache *cache; - /* If we can't find the data in the cache, then load the cache */ - cache = yaffs_FindChunkCache(in, chunk); - - if (!cache - && yaffs_CheckSpaceForAllocation(in-> - myDev)) { - cache = yaffs_GrabChunkCache(in->myDev); - cache->object = in; - cache->chunkId = chunk; - cache->dirty = 0; - cache->locked = 0; - yaffs_ReadChunkDataFromObject(in, chunk, - cache-> - data); - } - else if(cache && - !cache->dirty && - !yaffs_CheckSpaceForAllocation(in->myDev)){ - /* Drop the cache if it was a read cache item and - * no space check has been made for it. - */ - cache = NULL; - } - - if (cache) { - yaffs_UseChunkCache(dev, cache, 1); - cache->locked = 1; -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - - memcpy(&cache->data[start], buffer, - nToCopy); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - cache->locked = 0; - cache->nBytes = nToWriteBack; - - if (writeThrough) { - chunkWritten = - yaffs_WriteChunkDataToObject - (cache->object, - cache->chunkId, - cache->data, cache->nBytes, - 1); - cache->dirty = 0; - } - - } else { - chunkWritten = -1; /* fail the write */ - } - } else { - /* An incomplete start or end chunk (or maybe both start and end chunk) - * Read into the local buffer then copy, then copy over and write back. - */ - - __u8 *localBuffer = - yaffs_GetTempBuffer(dev, __LINE__); - - yaffs_ReadChunkDataFromObject(in, chunk, - localBuffer); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - - memcpy(&localBuffer[start], buffer, nToCopy); - -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, - localBuffer, - nToWriteBack, - 0); - - yaffs_ReleaseTempBuffer(dev, localBuffer, - __LINE__); - - } - - } else { - -#ifdef CONFIG_YAFFS_WINCE - /* Under WinCE can't do direct transfer. Need to use a local buffer. - * This is because we otherwise screw up WinCE's memory mapper - */ - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); -#ifdef CONFIG_YAFFS_WINCE - yfsd_UnlockYAFFS(TRUE); -#endif - memcpy(localBuffer, buffer, dev->nDataBytesPerChunk); -#ifdef CONFIG_YAFFS_WINCE - yfsd_LockYAFFS(TRUE); -#endif - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, localBuffer, - dev->nDataBytesPerChunk, - 0); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); -#else - /* A full chunk. Write directly from the supplied buffer. */ - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, buffer, - dev->nDataBytesPerChunk, - 0); -#endif - /* Since we've overwritten the cached data, we better invalidate it. */ - yaffs_InvalidateChunkCache(in, chunk); - } - - if (chunkWritten >= 0) { - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; - } - - } - - /* Update file object */ - - if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize) { - in->variant.fileVariant.fileSize = (startOfWrite + nDone); - } - - in->dirty = 1; - - return nDone; -} - - -/* ---------------------- File resizing stuff ------------------ */ - -static void yaffs_PruneResizedChunks(yaffs_Object * in, int newSize) -{ - - yaffs_Device *dev = in->myDev; - int oldFileSize = in->variant.fileVariant.fileSize; - - int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk; - - int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) / - dev->nDataBytesPerChunk; - int i; - int chunkId; - - /* Delete backwards so that we don't end up with holes if - * power is lost part-way through the operation. - */ - for (i = lastDel; i >= startDel; i--) { - /* NB this could be optimised somewhat, - * eg. could retrieve the tags and write them without - * using yaffs_DeleteChunk - */ - - chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL); - if (chunkId > 0) { - if (chunkId < - (dev->internalStartBlock * dev->nChunksPerBlock) - || chunkId >= - ((dev->internalEndBlock + - 1) * dev->nChunksPerBlock)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("Found daft chunkId %d for %d" TENDSTR), - chunkId, i)); - } else { - in->nDataChunks--; - yaffs_DeleteChunk(dev, chunkId, 1, __LINE__); - } - } - } - -} - -int yaffs_ResizeFile(yaffs_Object * in, loff_t newSize) -{ - - int oldFileSize = in->variant.fileVariant.fileSize; - __u32 newSizeOfPartialChunk = 0; - __u32 newFullChunks = 0; - - yaffs_Device *dev = in->myDev; - - yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk); - - yaffs_FlushFilesChunkCache(in); - yaffs_InvalidateWholeChunkCache(in); - - yaffs_CheckGarbageCollection(dev); - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - return yaffs_GetFileSize(in); - } - - if (newSize == oldFileSize) { - return oldFileSize; - } - - if (newSize < oldFileSize) { - - yaffs_PruneResizedChunks(in, newSize); - - if (newSizeOfPartialChunk != 0) { - int lastChunk = 1 + newFullChunks; - - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); - - /* Got to read and rewrite the last chunk with its new size and zero pad */ - yaffs_ReadChunkDataFromObject(in, lastChunk, - localBuffer); - - memset(localBuffer + newSizeOfPartialChunk, 0, - dev->nDataBytesPerChunk - newSizeOfPartialChunk); - - yaffs_WriteChunkDataToObject(in, lastChunk, localBuffer, - newSizeOfPartialChunk, 1); - - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); - } - - in->variant.fileVariant.fileSize = newSize; - - yaffs_PruneFileStructure(dev, &in->variant.fileVariant); - } else { - /* newsSize > oldFileSize */ - in->variant.fileVariant.fileSize = newSize; - } - - - - /* Write a new object header. - * show we've shrunk the file, if need be - * Do this only if the file is not in the deleted directories. - */ - if (in->parent->objectId != YAFFS_OBJECTID_UNLINKED && - in->parent->objectId != YAFFS_OBJECTID_DELETED) { - yaffs_UpdateObjectHeader(in, NULL, 0, - (newSize < oldFileSize) ? 1 : 0, 0); - } - - return YAFFS_OK; -} - -loff_t yaffs_GetFileSize(yaffs_Object * obj) -{ - obj = yaffs_GetEquivalentObject(obj); - - switch (obj->variantType) { - case YAFFS_OBJECT_TYPE_FILE: - return obj->variant.fileVariant.fileSize; - case YAFFS_OBJECT_TYPE_SYMLINK: - return yaffs_strlen(obj->variant.symLinkVariant.alias); - default: - return 0; - } -} - - - -int yaffs_FlushFile(yaffs_Object * in, int updateTime) -{ - int retVal; - if (in->dirty) { - yaffs_FlushFilesChunkCache(in); - if (updateTime) { -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(in->win_mtime); -#else - - in->yst_mtime = Y_CURRENT_TIME; - -#endif - } - - retVal = - (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >= - 0) ? YAFFS_OK : YAFFS_FAIL; - } else { - retVal = YAFFS_OK; - } - - return retVal; - -} - -static int yaffs_DoGenericObjectDeletion(yaffs_Object * in) -{ - - /* First off, invalidate the file's data in the cache, without flushing. */ - yaffs_InvalidateWholeChunkCache(in); - - if (in->myDev->isYaffs2 && (in->parent != in->myDev->deletedDir)) { - /* Move to the unlinked directory so we have a record that it was deleted. */ - yaffs_ChangeObjectName(in, in->myDev->deletedDir,"deleted", 0, 0); - - } - - yaffs_RemoveObjectFromDirectory(in); - yaffs_DeleteChunk(in->myDev, in->chunkId, 1, __LINE__); - in->chunkId = -1; - - yaffs_FreeObject(in); - return YAFFS_OK; - -} - -/* yaffs_DeleteFile deletes the whole file data - * and the inode associated with the file. - * It does not delete the links associated with the file. - */ -static int yaffs_UnlinkFile(yaffs_Object * in) -{ - - int retVal; - int immediateDeletion = 0; - - if (1) { -/* XXX U-BOOT XXX */ -#if 0 -#ifdef __KERNEL__ - if (!in->myInode) { - immediateDeletion = 1; - - } -#endif -#else - if (in->inUse <= 0) { - immediateDeletion = 1; - - } -#endif - if (immediateDeletion) { - retVal = - yaffs_ChangeObjectName(in, in->myDev->deletedDir, - "deleted", 0, 0); - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: immediate deletion of file %d" TENDSTR), - in->objectId)); - in->deleted = 1; - in->myDev->nDeletedFiles++; - if (0 && in->myDev->isYaffs2) { - yaffs_ResizeFile(in, 0); - } - yaffs_SoftDeleteFile(in); - } else { - retVal = - yaffs_ChangeObjectName(in, in->myDev->unlinkedDir, - "unlinked", 0, 0); - } - - } - return retVal; -} - -int yaffs_DeleteFile(yaffs_Object * in) -{ - int retVal = YAFFS_OK; - - if (in->nDataChunks > 0) { - /* Use soft deletion if there is data in the file */ - if (!in->unlinked) { - retVal = yaffs_UnlinkFile(in); - } - if (retVal == YAFFS_OK && in->unlinked && !in->deleted) { - in->deleted = 1; - in->myDev->nDeletedFiles++; - yaffs_SoftDeleteFile(in); - } - return in->deleted ? YAFFS_OK : YAFFS_FAIL; - } else { - /* The file has no data chunks so we toss it immediately */ - yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top); - in->variant.fileVariant.top = NULL; - yaffs_DoGenericObjectDeletion(in); - - return YAFFS_OK; - } -} - -static int yaffs_DeleteDirectory(yaffs_Object * in) -{ - /* First check that the directory is empty. */ - if (list_empty(&in->variant.directoryVariant.children)) { - return yaffs_DoGenericObjectDeletion(in); - } - - return YAFFS_FAIL; - -} - -static int yaffs_DeleteSymLink(yaffs_Object * in) -{ - YFREE(in->variant.symLinkVariant.alias); - - return yaffs_DoGenericObjectDeletion(in); -} - -static int yaffs_DeleteHardLink(yaffs_Object * in) -{ - /* remove this hardlink from the list assocaited with the equivalent - * object - */ - list_del(&in->hardLinks); - return yaffs_DoGenericObjectDeletion(in); -} - -static void yaffs_DestroyObject(yaffs_Object * obj) -{ - switch (obj->variantType) { - case YAFFS_OBJECT_TYPE_FILE: - yaffs_DeleteFile(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - yaffs_DeleteDirectory(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_DeleteSymLink(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - yaffs_DeleteHardLink(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - yaffs_DoGenericObjectDeletion(obj); - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - break; /* should not happen. */ - } -} - -static int yaffs_UnlinkWorker(yaffs_Object * obj) -{ - - if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - return yaffs_DeleteHardLink(obj); - } else if (!list_empty(&obj->hardLinks)) { - /* Curve ball: We're unlinking an object that has a hardlink. - * - * This problem arises because we are not strictly following - * The Linux link/inode model. - * - * We can't really delete the object. - * Instead, we do the following: - * - Select a hardlink. - * - Unhook it from the hard links - * - Unhook it from its parent directory (so that the rename can work) - * - Rename the object to the hardlink's name. - * - Delete the hardlink - */ - - yaffs_Object *hl; - int retVal; - YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - - hl = list_entry(obj->hardLinks.next, yaffs_Object, hardLinks); - - list_del_init(&hl->hardLinks); - list_del_init(&hl->siblings); - - yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1); - - retVal = yaffs_ChangeObjectName(obj, hl->parent, name, 0, 0); - - if (retVal == YAFFS_OK) { - retVal = yaffs_DoGenericObjectDeletion(hl); - } - return retVal; - - } else { - switch (obj->variantType) { - case YAFFS_OBJECT_TYPE_FILE: - return yaffs_UnlinkFile(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - return yaffs_DeleteDirectory(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - return yaffs_DeleteSymLink(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - return yaffs_DoGenericObjectDeletion(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_UNKNOWN: - default: - return YAFFS_FAIL; - } - } -} - - -static int yaffs_UnlinkObject( yaffs_Object *obj) -{ - - if (obj && obj->unlinkAllowed) { - return yaffs_UnlinkWorker(obj); - } - - return YAFFS_FAIL; - -} -int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name) -{ - yaffs_Object *obj; - - obj = yaffs_FindObjectByName(dir, name); - return yaffs_UnlinkObject(obj); -} - -/*----------------------- Initialisation Scanning ---------------------- */ - -static void yaffs_HandleShadowedObject(yaffs_Device * dev, int objId, - int backwardScanning) -{ - yaffs_Object *obj; - - if (!backwardScanning) { - /* Handle YAFFS1 forward scanning case - * For YAFFS1 we always do the deletion - */ - - } else { - /* Handle YAFFS2 case (backward scanning) - * If the shadowed object exists then ignore. - */ - if (yaffs_FindObjectByNumber(dev, objId)) { - return; - } - } - - /* Let's create it (if it does not exist) assuming it is a file so that it can do shrinking etc. - * We put it in unlinked dir to be cleaned up after the scanning - */ - obj = - yaffs_FindOrCreateObjectByNumber(dev, objId, - YAFFS_OBJECT_TYPE_FILE); - yaffs_AddObjectToDirectory(dev->unlinkedDir, obj); - obj->variant.fileVariant.shrinkSize = 0; - obj->valid = 1; /* So that we don't read any other info for this file */ - -} - -typedef struct { - int seq; - int block; -} yaffs_BlockIndex; - - -static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList) -{ - yaffs_Object *hl; - yaffs_Object *in; - - while (hardList) { - hl = hardList; - hardList = (yaffs_Object *) (hardList->hardLinks.next); - - in = yaffs_FindObjectByNumber(dev, - hl->variant.hardLinkVariant. - equivalentObjectId); - - if (in) { - /* Add the hardlink pointers */ - hl->variant.hardLinkVariant.equivalentObject = in; - list_add(&hl->hardLinks, &in->hardLinks); - } else { - /* Todo Need to report/handle this better. - * Got a problem... hardlink to a non-existant object - */ - hl->variant.hardLinkVariant.equivalentObject = NULL; - INIT_LIST_HEAD(&hl->hardLinks); - - } - - } - -} - - - - - -static int ybicmp(const void *a, const void *b){ - register int aseq = ((yaffs_BlockIndex *)a)->seq; - register int bseq = ((yaffs_BlockIndex *)b)->seq; - register int ablock = ((yaffs_BlockIndex *)a)->block; - register int bblock = ((yaffs_BlockIndex *)b)->block; - if( aseq == bseq ) - return ablock - bblock; - else - return aseq - bseq; - -} - -static int yaffs_Scan(yaffs_Device * dev) -{ - yaffs_ExtendedTags tags; - int blk; - int blockIterator; - int startIterator; - int endIterator; - int nBlocksToScan = 0; - - int chunk; - int c; - int deleted; - yaffs_BlockState state; - yaffs_Object *hardList = NULL; - yaffs_BlockInfo *bi; - int sequenceNumber; - yaffs_ObjectHeader *oh; - yaffs_Object *in; - yaffs_Object *parent; - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - - int alloc_failed = 0; - - - __u8 *chunkData; - - yaffs_BlockIndex *blockIndex = NULL; - - if (dev->isYaffs2) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan is not for YAFFS2!" TENDSTR))); - return YAFFS_FAIL; - } - - //TODO Throw all the yaffs2 stuuf out of yaffs_Scan since it is only for yaffs1 format. - - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR), - dev->internalStartBlock, dev->internalEndBlock)); - - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - - if (dev->isYaffs2) { - blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); - if(!blockIndex) - return YAFFS_FAIL; - } - - /* Scan all the blocks to determine their state */ - for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { - bi = yaffs_GetBlockInfo(dev, blk); - yaffs_ClearChunkBits(dev, blk); - bi->pagesInUse = 0; - bi->softDeletions = 0; - - yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); - - bi->blockState = state; - bi->sequenceNumber = sequenceNumber; - - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, - state, sequenceNumber)); - - if (state == YAFFS_BLOCK_STATE_DEAD) { - T(YAFFS_TRACE_BAD_BLOCKS, - (TSTR("block %d is bad" TENDSTR), blk)); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block empty " TENDSTR))); - dev->nErasedBlocks++; - dev->nFreeChunks += dev->nChunksPerBlock; - } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - - /* Determine the highest sequence number */ - if (dev->isYaffs2 && - sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && - sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) { - - blockIndex[nBlocksToScan].seq = sequenceNumber; - blockIndex[nBlocksToScan].block = blk; - - nBlocksToScan++; - - if (sequenceNumber >= dev->sequenceNumber) { - dev->sequenceNumber = sequenceNumber; - } - } else if (dev->isYaffs2) { - /* TODO: Nasty sequence number! */ - T(YAFFS_TRACE_SCAN, - (TSTR - ("Block scanning block %d has bad sequence number %d" - TENDSTR), blk, sequenceNumber)); - - } - } - } - - /* Sort the blocks - * Dungy old bubble sort for now... - */ - if (dev->isYaffs2) { - yaffs_BlockIndex temp; - int i; - int j; - - for (i = 0; i < nBlocksToScan; i++) - for (j = i + 1; j < nBlocksToScan; j++) - if (blockIndex[i].seq > blockIndex[j].seq) { - temp = blockIndex[j]; - blockIndex[j] = blockIndex[i]; - blockIndex[i] = temp; - } - } - - /* Now scan the blocks looking at the data. */ - if (dev->isYaffs2) { - startIterator = 0; - endIterator = nBlocksToScan - 1; - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); - } else { - startIterator = dev->internalStartBlock; - endIterator = dev->internalEndBlock; - } - - /* For each block.... */ - for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator; - blockIterator++) { - - if (dev->isYaffs2) { - /* get the block to scan in the correct order */ - blk = blockIndex[blockIterator].block; - } else { - blk = blockIterator; - } - - bi = yaffs_GetBlockInfo(dev, blk); - state = bi->blockState; - - deleted = 0; - - /* For each chunk in each block that needs scanning....*/ - for (c = 0; !alloc_failed && c < dev->nChunksPerBlock && - state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { - /* Read the tags and decide what to do */ - chunk = blk * dev->nChunksPerBlock + c; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (!dev->isYaffs2 && tags.chunkDeleted) { - /* YAFFS1 only... - * A deleted chunk - */ - deleted++; - dev->nFreeChunks++; - /*T((" %d %d deleted\n",blk,c)); */ - } else if (!tags.chunkUsed) { - /* An unassigned chunk in the block - * This means that either the block is empty or - * this is the one being allocated from - */ - - if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - } else { - /* this is the block being allocated from */ - T(YAFFS_TRACE_SCAN, - (TSTR - (" Allocating from %d %d" TENDSTR), - blk, c)); - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->allocationBlock = blk; - dev->allocationPage = c; - dev->allocationBlockFinder = blk; - /* Set it to here to encourage the allocator to go forth from here. */ - - /* Yaffs2 sanity check: - * This should be the one with the highest sequence number - */ - if (dev->isYaffs2 - && (dev->sequenceNumber != - bi->sequenceNumber)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: Allocation block %d was not highest sequence id:" - " block seq = %d, dev seq = %d" - TENDSTR), blk,bi->sequenceNumber,dev->sequenceNumber)); - } - } - - dev->nFreeChunks += (dev->nChunksPerBlock - c); - } else if (tags.chunkId > 0) { - /* chunkId > 0 so it is a data chunk... */ - unsigned int endpos; - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - YAFFS_OBJECT_TYPE_FILE); - /* PutChunkIntoFile checks for a clash (two data chunks with - * the same chunkId). - */ - - if(!in) - alloc_failed = 1; - - if(in){ - if(!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk,1)) - alloc_failed = 1; - } - - endpos = - (tags.chunkId - 1) * dev->nDataBytesPerChunk + - tags.byteCount; - if (in && - in->variantType == YAFFS_OBJECT_TYPE_FILE - && in->variant.fileVariant.scannedFileSize < - endpos) { - in->variant.fileVariant. - scannedFileSize = endpos; - if (!dev->useHeaderFileSize) { - in->variant.fileVariant. - fileSize = - in->variant.fileVariant. - scannedFileSize; - } - - } - /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */ - } else { - /* chunkId == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object - */ - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, - chunkData, - NULL); - - oh = (yaffs_ObjectHeader *) chunkData; - - in = yaffs_FindObjectByNumber(dev, - tags.objectId); - if (in && in->variantType != oh->type) { - /* This should not happen, but somehow - * Wev'e ended up with an objectId that has been reused but not yet - * deleted, and worse still it has changed type. Delete the old object. - */ - - yaffs_DestroyObject(in); - - in = 0; - } - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - oh->type); - - if(!in) - alloc_failed = 1; - - if (in && oh->shadowsObject > 0) { - yaffs_HandleShadowedObject(dev, - oh-> - shadowsObject, - 0); - } - - if (in && in->valid) { - /* We have already filled this one. We have a duplicate and need to resolve it. */ - - unsigned existingSerial = in->serial; - unsigned newSerial = tags.serialNumber; - - if (dev->isYaffs2 || - ((existingSerial + 1) & 3) == - newSerial) { - /* Use new one - destroy the exisiting one */ - yaffs_DeleteChunk(dev, - in->chunkId, - 1, __LINE__); - in->valid = 0; - } else { - /* Use existing - destroy this one. */ - yaffs_DeleteChunk(dev, chunk, 1, - __LINE__); - } - } - - if (in && !in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - in->chunkId = chunk; - - } else if (in && !in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - in->chunkId = chunk; - - yaffs_SetObjectName(in, oh->name); - in->dirty = 0; - - /* directory stuff... - * hook up to parent - */ - - parent = - yaffs_FindOrCreateObjectByNumber - (dev, oh->parentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - if (parent->variantType == - YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variantType = - YAFFS_OBJECT_TYPE_DIRECTORY; - INIT_LIST_HEAD(&parent->variant. - directoryVariant. - children); - } else if (parent->variantType != - YAFFS_OBJECT_TYPE_DIRECTORY) - { - /* Hoosterman, another problem.... - * We're trying to use a non-directory as a directory - */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: attempting to use non-directory as" - " a directory in scan. Put in lost+found." - TENDSTR))); - parent = dev->lostNFoundDir; - } - - yaffs_AddObjectToDirectory(parent, in); - - if (0 && (parent == dev->deletedDir || - parent == dev->unlinkedDir)) { - in->deleted = 1; /* If it is unlinked at start up then it wants deleting */ - dev->nDeletedFiles++; - } - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run through this - * list and fix up all the chains. - */ - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - if (dev->isYaffs2 - && oh->isShrink) { - /* Prune back the shrunken chunks */ - yaffs_PruneResizedChunks - (in, oh->fileSize); - /* Mark the block as having a shrinkHeader */ - bi->hasShrinkHeader = 1; - } - - if (dev->useHeaderFileSize) - - in->variant.fileVariant. - fileSize = - oh->fileSize; - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardLinkVariant. - equivalentObjectId = - oh->equivalentObjectId; - in->hardLinks.next = - (struct list_head *) - hardList; - hardList = in; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh->alias); - if(!in->variant.symLinkVariant.alias) - alloc_failed = 1; - break; - } - - if (parent == dev->deletedDir) { - yaffs_DestroyObject(in); - bi->hasShrinkHeader = 1; - } - } - } - } - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated.*/ - state = YAFFS_BLOCK_STATE_FULL; - } - - bi->blockState = state; - - /* Now let's see if it was dirty */ - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState == YAFFS_BLOCK_STATE_FULL) { - yaffs_BlockBecameDirty(dev, blk); - } - - } - - if (blockIndex) { - YFREE(blockIndex); - } - - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. - */ - - yaffs_HardlinkFixup(dev,hardList); - - /* Handle the unlinked files. Since they were left in an unlinked state we should - * just delete them. - */ - { - struct list_head *i; - struct list_head *n; - - yaffs_Object *l; - /* Soft delete all the unlinked files */ - list_for_each_safe(i, n, - &dev->unlinkedDir->variant.directoryVariant. - children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - yaffs_DestroyObject(l); - } - } - } - - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - - if(alloc_failed){ - return YAFFS_FAIL; - } - - T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR))); - - - return YAFFS_OK; -} - -static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in) -{ - __u8 *chunkData; - yaffs_ObjectHeader *oh; - yaffs_Device *dev = in->myDev; - yaffs_ExtendedTags tags; - - if(!in) - return; - -#if 0 - T(YAFFS_TRACE_SCAN,(TSTR("details for object %d %s loaded" TENDSTR), - in->objectId, - in->lazyLoaded ? "not yet" : "already")); -#endif - - if(in->lazyLoaded){ - in->lazyLoaded = 0; - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - yaffs_ReadChunkWithTagsFromNAND(dev, in->chunkId, - chunkData, &tags); - oh = (yaffs_ObjectHeader *) chunkData; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; - -#endif - yaffs_SetObjectName(in, oh->name); - - if(in->variantType == YAFFS_OBJECT_TYPE_SYMLINK){ - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh->alias); - } - - yaffs_ReleaseTempBuffer(dev,chunkData, __LINE__); - } -} - -static int yaffs_ScanBackwards(yaffs_Device * dev) -{ - yaffs_ExtendedTags tags; - int blk; - int blockIterator; - int startIterator; - int endIterator; - int nBlocksToScan = 0; - - int chunk; - int c; - yaffs_BlockState state; - yaffs_Object *hardList = NULL; - yaffs_BlockInfo *bi; - int sequenceNumber; - yaffs_ObjectHeader *oh; - yaffs_Object *in; - yaffs_Object *parent; - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - int itsUnlinked; - __u8 *chunkData; - - int fileSize; - int isShrink; - int foundChunksInBlock; - int equivalentObjectId; - int alloc_failed = 0; - - - yaffs_BlockIndex *blockIndex = NULL; - int altBlockIndex = 0; - - if (!dev->isYaffs2) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR))); - return YAFFS_FAIL; - } - - T(YAFFS_TRACE_SCAN, - (TSTR - ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..." - TENDSTR), dev->internalStartBlock, dev->internalEndBlock)); - - - dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - - blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); - - if(!blockIndex) { - blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex)); - altBlockIndex = 1; - } - - if(!blockIndex) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR))); - return YAFFS_FAIL; - } - - dev->blocksInCheckpoint = 0; - - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - /* Scan all the blocks to determine their state */ - for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { - bi = yaffs_GetBlockInfo(dev, blk); - yaffs_ClearChunkBits(dev, blk); - bi->pagesInUse = 0; - bi->softDeletions = 0; - - yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); - - bi->blockState = state; - bi->sequenceNumber = sequenceNumber; - - if(bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) - bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT; - - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, - state, sequenceNumber)); - - - if(state == YAFFS_BLOCK_STATE_CHECKPOINT){ - dev->blocksInCheckpoint++; - - } else if (state == YAFFS_BLOCK_STATE_DEAD) { - T(YAFFS_TRACE_BAD_BLOCKS, - (TSTR("block %d is bad" TENDSTR), blk)); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block empty " TENDSTR))); - dev->nErasedBlocks++; - dev->nFreeChunks += dev->nChunksPerBlock; - } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - - /* Determine the highest sequence number */ - if (dev->isYaffs2 && - sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && - sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) { - - blockIndex[nBlocksToScan].seq = sequenceNumber; - blockIndex[nBlocksToScan].block = blk; - - nBlocksToScan++; - - if (sequenceNumber >= dev->sequenceNumber) { - dev->sequenceNumber = sequenceNumber; - } - } else if (dev->isYaffs2) { - /* TODO: Nasty sequence number! */ - T(YAFFS_TRACE_SCAN, - (TSTR - ("Block scanning block %d has bad sequence number %d" - TENDSTR), blk, sequenceNumber)); - - } - } - } - - T(YAFFS_TRACE_SCAN, - (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan)); - - - - YYIELD(); - - /* Sort the blocks */ -#ifndef CONFIG_YAFFS_USE_OWN_SORT - { - /* Use qsort now. */ - yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp); - } -#else - { - /* Dungy old bubble sort... */ - - yaffs_BlockIndex temp; - int i; - int j; - - for (i = 0; i < nBlocksToScan; i++) - for (j = i + 1; j < nBlocksToScan; j++) - if (blockIndex[i].seq > blockIndex[j].seq) { - temp = blockIndex[j]; - blockIndex[j] = blockIndex[i]; - blockIndex[i] = temp; - } - } -#endif - - YYIELD(); - - T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR))); - - /* Now scan the blocks looking at the data. */ - startIterator = 0; - endIterator = nBlocksToScan - 1; - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); - - /* For each block.... backwards */ - for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator; - blockIterator--) { - /* Cooperative multitasking! This loop can run for so - long that watchdog timers expire. */ - YYIELD(); - - /* get the block to scan in the correct order */ - blk = blockIndex[blockIterator].block; - - bi = yaffs_GetBlockInfo(dev, blk); - - - state = bi->blockState; - - /* For each chunk in each block that needs scanning.... */ - foundChunksInBlock = 0; - for (c = dev->nChunksPerBlock - 1; - !alloc_failed && c >= 0 && - (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - state == YAFFS_BLOCK_STATE_ALLOCATING); c--) { - /* Scan backwards... - * Read the tags and decide what to do - */ - - chunk = blk * dev->nChunksPerBlock + c; - - yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (!tags.chunkUsed) { - /* An unassigned chunk in the block. - * If there are used chunks after this one, then - * it is a chunk that was skipped due to failing the erased - * check. Just skip it so that it can be deleted. - * But, more typically, We get here when this is an unallocated - * chunk and his means that either the block is empty or - * this is the one being allocated from - */ - - if(foundChunksInBlock) - { - /* This is a chunk that was skipped due to failing the erased check */ - - } else if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - } else { - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - state == YAFFS_BLOCK_STATE_ALLOCATING) { - if(dev->sequenceNumber == bi->sequenceNumber) { - /* this is the block being allocated from */ - - T(YAFFS_TRACE_SCAN, - (TSTR - (" Allocating from %d %d" - TENDSTR), blk, c)); - - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->allocationBlock = blk; - dev->allocationPage = c; - dev->allocationBlockFinder = blk; - } - else { - /* This is a partially written block that is not - * the current allocation block. This block must have - * had a write failure, so set up for retirement. - */ - - bi->needsRetiring = 1; - bi->gcPrioritise = 1; - - T(YAFFS_TRACE_ALWAYS, - (TSTR("Partially written block %d being set for retirement" TENDSTR), - blk)); - } - - } - - } - - dev->nFreeChunks++; - - } else if (tags.chunkId > 0) { - /* chunkId > 0 so it is a data chunk... */ - unsigned int endpos; - __u32 chunkBase = - (tags.chunkId - 1) * dev->nDataBytesPerChunk; - - foundChunksInBlock = 1; - - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - YAFFS_OBJECT_TYPE_FILE); - if(!in){ - /* Out of memory */ - alloc_failed = 1; - } - - if (in && - in->variantType == YAFFS_OBJECT_TYPE_FILE - && chunkBase < - in->variant.fileVariant.shrinkSize) { - /* This has not been invalidated by a resize */ - if(!yaffs_PutChunkIntoFile(in, tags.chunkId, - chunk, -1)){ - alloc_failed = 1; - } - - /* File size is calculated by looking at the data chunks if we have not - * seen an object header yet. Stop this practice once we find an object header. - */ - endpos = - (tags.chunkId - - 1) * dev->nDataBytesPerChunk + - tags.byteCount; - - if (!in->valid && /* have not got an object header yet */ - in->variant.fileVariant. - scannedFileSize < endpos) { - in->variant.fileVariant. - scannedFileSize = endpos; - in->variant.fileVariant. - fileSize = - in->variant.fileVariant. - scannedFileSize; - } - - } else if(in) { - /* This chunk has been invalidated by a resize, so delete */ - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); - - } - } else { - /* chunkId == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object - */ - foundChunksInBlock = 1; - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - oh = NULL; - in = NULL; - - if (tags.extraHeaderInfoAvailable) { - in = yaffs_FindOrCreateObjectByNumber - (dev, tags.objectId, - tags.extraObjectType); - } - - if (!in || -#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD - !in->valid || -#endif - tags.extraShadows || - (!in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) - ) { - - /* If we don't have valid info then we need to read the chunk - * TODO In future we can probably defer reading the chunk and - * living with invalid data until needed. - */ - - yaffs_ReadChunkWithTagsFromNAND(dev, - chunk, - chunkData, - NULL); - - oh = (yaffs_ObjectHeader *) chunkData; - - if (!in) - in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type); - - } - - if (!in) { - /* TODO Hoosterman we have a problem! */ - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: Could not make object for object %d " - "at chunk %d during scan" - TENDSTR), tags.objectId, chunk)); - - } - - if (in->valid) { - /* We have already filled this one. - * We have a duplicate that will be discarded, but - * we first have to suck out resize info if it is a file. - */ - - if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) && - ((oh && - oh-> type == YAFFS_OBJECT_TYPE_FILE)|| - (tags.extraHeaderInfoAvailable && - tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE)) - ) { - __u32 thisSize = - (oh) ? oh->fileSize : tags. - extraFileLength; - __u32 parentObjectId = - (oh) ? oh-> - parentObjectId : tags. - extraParentObjectId; - unsigned isShrink = - (oh) ? oh->isShrink : tags. - extraIsShrinkHeader; - - /* If it is deleted (unlinked at start also means deleted) - * we treat the file size as being zeroed at this point. - */ - if (parentObjectId == - YAFFS_OBJECTID_DELETED - || parentObjectId == - YAFFS_OBJECTID_UNLINKED) { - thisSize = 0; - isShrink = 1; - } - - if (isShrink && - in->variant.fileVariant. - shrinkSize > thisSize) { - in->variant.fileVariant. - shrinkSize = - thisSize; - } - - if (isShrink) { - bi->hasShrinkHeader = 1; - } - - } - /* Use existing - destroy this one. */ - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); - - } - - if (!in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == - YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - - if(oh) { - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; - -#endif - } else { - in->variantType = tags.extraObjectType; - in->lazyLoaded = 1; - } - - in->chunkId = chunk; - - } else if (!in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->chunkId = chunk; - - if(oh) { - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - - if (oh->shadowsObject > 0) - yaffs_HandleShadowedObject(dev, - oh-> - shadowsObject, - 1); - - - yaffs_SetObjectName(in, oh->name); - parent = - yaffs_FindOrCreateObjectByNumber - (dev, oh->parentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - - fileSize = oh->fileSize; - isShrink = oh->isShrink; - equivalentObjectId = oh->equivalentObjectId; - - } - else { - in->variantType = tags.extraObjectType; - parent = - yaffs_FindOrCreateObjectByNumber - (dev, tags.extraParentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - fileSize = tags.extraFileLength; - isShrink = tags.extraIsShrinkHeader; - equivalentObjectId = tags.extraEquivalentObjectId; - in->lazyLoaded = 1; - - } - in->dirty = 0; - - /* directory stuff... - * hook up to parent - */ - - if (parent->variantType == - YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variantType = - YAFFS_OBJECT_TYPE_DIRECTORY; - INIT_LIST_HEAD(&parent->variant. - directoryVariant. - children); - } else if (parent->variantType != - YAFFS_OBJECT_TYPE_DIRECTORY) - { - /* Hoosterman, another problem.... - * We're trying to use a non-directory as a directory - */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: attempting to use non-directory as" - " a directory in scan. Put in lost+found." - TENDSTR))); - parent = dev->lostNFoundDir; - } - - yaffs_AddObjectToDirectory(parent, in); - - itsUnlinked = (parent == dev->deletedDir) || - (parent == dev->unlinkedDir); - - if (isShrink) { - /* Mark the block as having a shrinkHeader */ - bi->hasShrinkHeader = 1; - } - - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run - * through this list and fix up all the chains. - */ - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - - if (in->variant.fileVariant. - scannedFileSize < fileSize) { - /* This covers the case where the file size is greater - * than where the data is - * This will happen if the file is resized to be larger - * than its current data extents. - */ - in->variant.fileVariant.fileSize = fileSize; - in->variant.fileVariant.scannedFileSize = - in->variant.fileVariant.fileSize; - } - - if (isShrink && - in->variant.fileVariant.shrinkSize > fileSize) { - in->variant.fileVariant.shrinkSize = fileSize; - } - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - if(!itsUnlinked) { - in->variant.hardLinkVariant.equivalentObjectId = - equivalentObjectId; - in->hardLinks.next = - (struct list_head *) hardList; - hardList = in; - } - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - if(oh){ - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh-> - alias); - if(!in->variant.symLinkVariant.alias) - alloc_failed = 1; - } - break; - } - - } - - } - - } /* End of scanning for each chunk */ - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated. */ - state = YAFFS_BLOCK_STATE_FULL; - } - - bi->blockState = state; - - /* Now let's see if it was dirty */ - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState == YAFFS_BLOCK_STATE_FULL) { - yaffs_BlockBecameDirty(dev, blk); - } - - } - - if (altBlockIndex) - YFREE_ALT(blockIndex); - else - YFREE(blockIndex); - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. - */ - yaffs_HardlinkFixup(dev,hardList); - - - /* - * Sort out state of unlinked and deleted objects. - */ - { - struct list_head *i; - struct list_head *n; - - yaffs_Object *l; - - /* Soft delete all the unlinked files */ - list_for_each_safe(i, n, - &dev->unlinkedDir->variant.directoryVariant. - children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - yaffs_DestroyObject(l); - } - } - - /* Soft delete all the deletedDir files */ - list_for_each_safe(i, n, - &dev->deletedDir->variant.directoryVariant. - children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - yaffs_DestroyObject(l); - - } - } - } - - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - - if(alloc_failed){ - return YAFFS_FAIL; - } - - T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR))); - - return YAFFS_OK; -} - -/*------------------------------ Directory Functions ----------------------------- */ - -static void yaffs_RemoveObjectFromDirectory(yaffs_Object * obj) -{ - yaffs_Device *dev = obj->myDev; - - if(dev && dev->removeObjectCallback) - dev->removeObjectCallback(obj); - - list_del_init(&obj->siblings); - obj->parent = NULL; -} - - -static void yaffs_AddObjectToDirectory(yaffs_Object * directory, - yaffs_Object * obj) -{ - - if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a null pointer directory" - TENDSTR))); - YBUG(); - } - if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a non-directory" - TENDSTR))); - YBUG(); - } - - if (obj->siblings.prev == NULL) { - /* Not initialised */ - INIT_LIST_HEAD(&obj->siblings); - - } else if (!list_empty(&obj->siblings)) { - /* If it is holed up somewhere else, un hook it */ - yaffs_RemoveObjectFromDirectory(obj); - } - /* Now add it */ - list_add(&obj->siblings, &directory->variant.directoryVariant.children); - obj->parent = directory; - - if (directory == obj->myDev->unlinkedDir - || directory == obj->myDev->deletedDir) { - obj->unlinked = 1; - obj->myDev->nUnlinkedFiles++; - obj->renameAllowed = 0; - } -} - -yaffs_Object *yaffs_FindObjectByName(yaffs_Object * directory, - const YCHAR * name) -{ - int sum; - - struct list_head *i; - YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; - - yaffs_Object *l; - - if (!name) { - return NULL; - } - - if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: null pointer directory" - TENDSTR))); - YBUG(); - } - if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); - YBUG(); - } - - sum = yaffs_CalcNameSum(name); - - list_for_each(i, &directory->variant.directoryVariant.children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - - yaffs_CheckObjectDetailsLoaded(l); - - /* Special case for lost-n-found */ - if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) { - if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) { - return l; - } - } else if (yaffs_SumCompare(l->sum, sum) || l->chunkId <= 0) - { - /* LostnFound cunk called Objxxx - * Do a real check - */ - yaffs_GetObjectName(l, buffer, - YAFFS_MAX_NAME_LENGTH); - if (yaffs_strncmp(name, buffer,YAFFS_MAX_NAME_LENGTH) == 0) { - return l; - } - - } - } - } - - return NULL; -} - - -#if 0 -int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir, - int (*fn) (yaffs_Object *)) -{ - struct list_head *i; - yaffs_Object *l; - - if (!theDir) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: null pointer directory" - TENDSTR))); - YBUG(); - } - if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); - YBUG(); - } - - list_for_each(i, &theDir->variant.directoryVariant.children) { - if (i) { - l = list_entry(i, yaffs_Object, siblings); - if (l && !fn(l)) { - return YAFFS_FAIL; - } - } - } - - return YAFFS_OK; - -} -#endif - -/* GetEquivalentObject dereferences any hard links to get to the - * actual object. - */ - -yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj) -{ - if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - /* We want the object id of the equivalent object, not this one */ - obj = obj->variant.hardLinkVariant.equivalentObject; - yaffs_CheckObjectDetailsLoaded(obj); - } - return obj; - -} - -int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize) -{ - memset(name, 0, buffSize * sizeof(YCHAR)); - - yaffs_CheckObjectDetailsLoaded(obj); - - if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) { - yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1); - } else if (obj->chunkId <= 0) { - YCHAR locName[20]; - /* make up a name */ - yaffs_sprintf(locName, _Y("%s%d"), YAFFS_LOSTNFOUND_PREFIX, - obj->objectId); - yaffs_strncpy(name, locName, buffSize - 1); - - } -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - else if (obj->shortName[0]) { - yaffs_strcpy(name, obj->shortName); - } -#endif - else { - __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__); - - yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer; - - memset(buffer, 0, obj->myDev->nDataBytesPerChunk); - - if (obj->chunkId >= 0) { - yaffs_ReadChunkWithTagsFromNAND(obj->myDev, - obj->chunkId, buffer, - NULL); - } - yaffs_strncpy(name, oh->name, buffSize - 1); - - yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__); - } - - return yaffs_strlen(name); -} - -int yaffs_GetObjectFileLength(yaffs_Object * obj) -{ - - /* Dereference any hard linking */ - obj = yaffs_GetEquivalentObject(obj); - - if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) { - return obj->variant.fileVariant.fileSize; - } - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) { - return yaffs_strlen(obj->variant.symLinkVariant.alias); - } else { - /* Only a directory should drop through to here */ - return obj->myDev->nDataBytesPerChunk; - } -} - -int yaffs_GetObjectLinkCount(yaffs_Object * obj) -{ - int count = 0; - struct list_head *i; - - if (!obj->unlinked) { - count++; /* the object itself */ - } - list_for_each(i, &obj->hardLinks) { - count++; /* add the hard links; */ - } - return count; - -} - -int yaffs_GetObjectInode(yaffs_Object * obj) -{ - obj = yaffs_GetEquivalentObject(obj); - - return obj->objectId; -} - -unsigned yaffs_GetObjectType(yaffs_Object * obj) -{ - obj = yaffs_GetEquivalentObject(obj); - - switch (obj->variantType) { - case YAFFS_OBJECT_TYPE_FILE: - return DT_REG; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - return DT_DIR; - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - return DT_LNK; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - return DT_REG; - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - if (S_ISFIFO(obj->yst_mode)) - return DT_FIFO; - if (S_ISCHR(obj->yst_mode)) - return DT_CHR; - if (S_ISBLK(obj->yst_mode)) - return DT_BLK; - if (S_ISSOCK(obj->yst_mode)) - return DT_SOCK; - default: - return DT_REG; - break; - } -} - -YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj) -{ - obj = yaffs_GetEquivalentObject(obj); - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) { - return yaffs_CloneString(obj->variant.symLinkVariant.alias); - } else { - return yaffs_CloneString(_Y("")); - } -} - -#ifndef CONFIG_YAFFS_WINCE - -int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr) -{ - unsigned int valid = attr->ia_valid; - - if (valid & ATTR_MODE) - obj->yst_mode = attr->ia_mode; - if (valid & ATTR_UID) - obj->yst_uid = attr->ia_uid; - if (valid & ATTR_GID) - obj->yst_gid = attr->ia_gid; - - if (valid & ATTR_ATIME) - obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); - if (valid & ATTR_CTIME) - obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); - if (valid & ATTR_MTIME) - obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); - - if (valid & ATTR_SIZE) - yaffs_ResizeFile(obj, attr->ia_size); - - yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0); - - return YAFFS_OK; - -} -int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr) -{ - unsigned int valid = 0; - - attr->ia_mode = obj->yst_mode; - valid |= ATTR_MODE; - attr->ia_uid = obj->yst_uid; - valid |= ATTR_UID; - attr->ia_gid = obj->yst_gid; - valid |= ATTR_GID; - - Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; - valid |= ATTR_ATIME; - Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; - valid |= ATTR_CTIME; - Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; - valid |= ATTR_MTIME; - - attr->ia_size = yaffs_GetFileSize(obj); - valid |= ATTR_SIZE; - - attr->ia_valid = valid; - - return YAFFS_OK; - -} - -#endif - -#if 0 -int yaffs_DumpObject(yaffs_Object * obj) -{ - YCHAR name[257]; - - yaffs_GetObjectName(obj, name, 256); - - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("Object %d, inode %d "%s"\n dirty %d valid %d serial %d sum %d" - " chunk %d type %d size %d\n" - TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name, - obj->dirty, obj->valid, obj->serial, obj->sum, obj->chunkId, - yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj))); - - return YAFFS_OK; -} -#endif - -/*---------------------------- Initialisation code -------------------------------------- */ - -static int yaffs_CheckDevFunctions(const yaffs_Device * dev) -{ - - /* Common functions, gotta have */ - if (!dev->eraseBlockInNAND || !dev->initialiseNAND) - return 0; - -#ifdef CONFIG_YAFFS_YAFFS2 - - /* Can use the "with tags" style interface for yaffs1 or yaffs2 */ - if (dev->writeChunkWithTagsToNAND && - dev->readChunkWithTagsFromNAND && - !dev->writeChunkToNAND && - !dev->readChunkFromNAND && - dev->markNANDBlockBad && dev->queryNANDBlock) - return 1; -#endif - - /* Can use the "spare" style interface for yaffs1 */ - if (!dev->isYaffs2 && - !dev->writeChunkWithTagsToNAND && - !dev->readChunkWithTagsFromNAND && - dev->writeChunkToNAND && - dev->readChunkFromNAND && - !dev->markNANDBlockBad && !dev->queryNANDBlock) - return 1; - - return 0; /* bad */ -} - - -static int yaffs_CreateInitialDirectories(yaffs_Device *dev) -{ - /* Initialise the unlinked, deleted, root and lost and found directories */ - - dev->lostNFoundDir = dev->rootDir = NULL; - dev->unlinkedDir = dev->deletedDir = NULL; - - dev->unlinkedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); - - dev->deletedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); - - dev->rootDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT, - YAFFS_ROOT_MODE | S_IFDIR); - dev->lostNFoundDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND, - YAFFS_LOSTNFOUND_MODE | S_IFDIR); - - if(dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir){ - yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir); - return YAFFS_OK; - } - - return YAFFS_FAIL; -} - -int yaffs_GutsInitialise(yaffs_Device * dev) -{ - int init_failed = 0; - unsigned x; - int bits; - - T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR))); - - /* Check stuff that must be set */ - - if (!dev) { - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR))); - return YAFFS_FAIL; - } - - dev->internalStartBlock = dev->startBlock; - dev->internalEndBlock = dev->endBlock; - dev->blockOffset = 0; - dev->chunkOffset = 0; - dev->nFreeChunks = 0; - - if (dev->startBlock == 0) { - dev->internalStartBlock = dev->startBlock + 1; - dev->internalEndBlock = dev->endBlock + 1; - dev->blockOffset = 1; - dev->chunkOffset = dev->nChunksPerBlock; - } - - /* Check geometry parameters. */ - - if ((dev->isYaffs2 && dev->nDataBytesPerChunk < 1024) || - (!dev->isYaffs2 && dev->nDataBytesPerChunk != 512) || - dev->nChunksPerBlock < 2 || - dev->nReservedBlocks < 2 || - dev->internalStartBlock <= 0 || - dev->internalEndBlock <= 0 || - dev->internalEndBlock <= (dev->internalStartBlock + dev->nReservedBlocks + 2) // otherwise it is too small - ) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s " - TENDSTR), dev->nDataBytesPerChunk, dev->isYaffs2 ? "2" : "")); - return YAFFS_FAIL; - } - - if (yaffs_InitialiseNAND(dev) != YAFFS_OK) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: InitialiseNAND failed" TENDSTR))); - return YAFFS_FAIL; - } - - /* Got the right mix of functions? */ - if (!yaffs_CheckDevFunctions(dev)) { - /* Function missing */ - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: device function(s) missing or wrong\n" TENDSTR))); - - return YAFFS_FAIL; - } - - /* This is really a compilation check. */ - if (!yaffs_CheckStructures()) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs_CheckStructures failed\n" TENDSTR))); - return YAFFS_FAIL; - } - - if (dev->isMounted) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: device already mounted\n" TENDSTR))); - return YAFFS_FAIL; - } - - /* Finished with most checks. One or two more checks happen later on too. */ - - dev->isMounted = 1; - - - - /* OK now calculate a few things for the device */ - - /* - * Calculate all the chunk size manipulation numbers: - */ - /* Start off assuming it is a power of 2 */ - dev->chunkShift = ShiftDiv(dev->nDataBytesPerChunk); - dev->chunkMask = (1<<dev->chunkShift) - 1; - - if(dev->nDataBytesPerChunk == (dev->chunkMask + 1)){ - /* Yes it is a power of 2, disable crumbs */ - dev->crumbMask = 0; - dev->crumbShift = 0; - dev->crumbsPerChunk = 0; - } else { - /* Not a power of 2, use crumbs instead */ - dev->crumbShift = ShiftDiv(sizeof(yaffs_PackedTags2TagsPart)); - dev->crumbMask = (1<<dev->crumbShift)-1; - dev->crumbsPerChunk = dev->nDataBytesPerChunk/(1 << dev->crumbShift); - dev->chunkShift = 0; - dev->chunkMask = 0; - } - - - /* - * Calculate chunkGroupBits. - * We need to find the next power of 2 > than internalEndBlock - */ - - x = dev->nChunksPerBlock * (dev->internalEndBlock + 1); - - bits = ShiftsGE(x); - - /* Set up tnode width if wide tnodes are enabled. */ - if(!dev->wideTnodesDisabled){ - /* bits must be even so that we end up with 32-bit words */ - if(bits & 1) - bits++; - if(bits < 16) - dev->tnodeWidth = 16; - else - dev->tnodeWidth = bits; - } - else - dev->tnodeWidth = 16; - - dev->tnodeMask = (1<<dev->tnodeWidth)-1; - - /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), - * so if the bitwidth of the - * chunk range we're using is greater than 16 we need - * to figure out chunk shift and chunkGroupSize - */ - - if (bits <= dev->tnodeWidth) - dev->chunkGroupBits = 0; - else - dev->chunkGroupBits = bits - dev->tnodeWidth; - - - dev->chunkGroupSize = 1 << dev->chunkGroupBits; - - if (dev->nChunksPerBlock < dev->chunkGroupSize) { - /* We have a problem because the soft delete won't work if - * the chunk group size > chunks per block. - * This can be remedied by using larger "virtual blocks". - */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: chunk group too large\n" TENDSTR))); - - return YAFFS_FAIL; - } - - /* OK, we've finished verifying the device, lets continue with initialisation */ - - /* More device initialisation */ - dev->garbageCollections = 0; - dev->passiveGarbageCollections = 0; - dev->currentDirtyChecker = 0; - dev->bufferedBlock = -1; - dev->doingBufferedBlockRewrite = 0; - dev->nDeletedFiles = 0; - dev->nBackgroundDeletions = 0; - dev->nUnlinkedFiles = 0; - dev->eccFixed = 0; - dev->eccUnfixed = 0; - dev->tagsEccFixed = 0; - dev->tagsEccUnfixed = 0; - dev->nErasureFailures = 0; - dev->nErasedBlocks = 0; - dev->isDoingGC = 0; - dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */ - - /* Initialise temporary buffers and caches. */ - if(!yaffs_InitialiseTempBuffers(dev)) - init_failed = 1; - - dev->srCache = NULL; - dev->gcCleanupList = NULL; - - - if (!init_failed && - dev->nShortOpCaches > 0) { - int i; - __u8 *buf; - int srCacheBytes = dev->nShortOpCaches * sizeof(yaffs_ChunkCache); - - if (dev->nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) { - dev->nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES; - } - - dev->srCache = YMALLOC(srCacheBytes); - buf = (__u8 *)dev->srCache; - - if(dev->srCache) - memset(dev->srCache,0,srCacheBytes); - - for (i = 0; i < dev->nShortOpCaches && buf; i++) { - dev->srCache[i].object = NULL; - dev->srCache[i].lastUse = 0; - dev->srCache[i].dirty = 0; - dev->srCache[i].data = buf = YMALLOC_DMA(dev->nDataBytesPerChunk); - } - if(!buf) - init_failed = 1; - - dev->srLastUse = 0; - } - - dev->cacheHits = 0; - - if(!init_failed){ - dev->gcCleanupList = YMALLOC(dev->nChunksPerBlock * sizeof(__u32)); - if(!dev->gcCleanupList) - init_failed = 1; - } - - if (dev->isYaffs2) { - dev->useHeaderFileSize = 1; - } - if(!init_failed && !yaffs_InitialiseBlocks(dev)) - init_failed = 1; - - yaffs_InitialiseTnodes(dev); - yaffs_InitialiseObjects(dev); - - if(!init_failed && !yaffs_CreateInitialDirectories(dev)) - init_failed = 1; - - - if(!init_failed){ - /* Now scan the flash. */ - if (dev->isYaffs2) { - if(yaffs_CheckpointRestore(dev)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: restored from checkpoint" TENDSTR))); - } else { - - /* Clean up the mess caused by an aborted checkpoint load - * and scan backwards. - */ - yaffs_DeinitialiseBlocks(dev); - yaffs_DeinitialiseTnodes(dev); - yaffs_DeinitialiseObjects(dev); - - - dev->nErasedBlocks = 0; - dev->nFreeChunks = 0; - dev->allocationBlock = -1; - dev->allocationPage = -1; - dev->nDeletedFiles = 0; - dev->nUnlinkedFiles = 0; - dev->nBackgroundDeletions = 0; - dev->oldestDirtySequence = 0; - - if(!init_failed && !yaffs_InitialiseBlocks(dev)) - init_failed = 1; - - yaffs_InitialiseTnodes(dev); - yaffs_InitialiseObjects(dev); - - if(!init_failed && !yaffs_CreateInitialDirectories(dev)) - init_failed = 1; - - if(!init_failed && !yaffs_ScanBackwards(dev)) - init_failed = 1; - } - }else - if(!yaffs_Scan(dev)) - init_failed = 1; - } - - if(init_failed){ - /* Clean up the mess */ - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR))); - - yaffs_Deinitialise(dev); - return YAFFS_FAIL; - } - - /* Zero out stats */ - dev->nPageReads = 0; - dev->nPageWrites = 0; - dev->nBlockErasures = 0; - dev->nGCCopies = 0; - dev->nRetriedWrites = 0; - - dev->nRetiredBlocks = 0; - - yaffs_VerifyFreeChunks(dev); - yaffs_VerifyBlocks(dev); - - - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR))); - return YAFFS_OK; - -} - -void yaffs_Deinitialise(yaffs_Device * dev) -{ - if (dev->isMounted) { - int i; - - yaffs_DeinitialiseBlocks(dev); - yaffs_DeinitialiseTnodes(dev); - yaffs_DeinitialiseObjects(dev); - if (dev->nShortOpCaches > 0 && - dev->srCache) { - - for (i = 0; i < dev->nShortOpCaches; i++) { - if(dev->srCache[i].data) - YFREE(dev->srCache[i].data); - dev->srCache[i].data = NULL; - } - - YFREE(dev->srCache); - dev->srCache = NULL; - } - - YFREE(dev->gcCleanupList); - - for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - YFREE(dev->tempBuffer[i].buffer); - } - - dev->isMounted = 0; - } - -} - -static int yaffs_CountFreeChunks(yaffs_Device * dev) -{ - int nFree; - int b; - - yaffs_BlockInfo *blk; - - for (nFree = 0, b = dev->internalStartBlock; b <= dev->internalEndBlock; - b++) { - blk = yaffs_GetBlockInfo(dev, b); - - switch (blk->blockState) { - case YAFFS_BLOCK_STATE_EMPTY: - case YAFFS_BLOCK_STATE_ALLOCATING: - case YAFFS_BLOCK_STATE_COLLECTING: - case YAFFS_BLOCK_STATE_FULL: - nFree += - (dev->nChunksPerBlock - blk->pagesInUse + - blk->softDeletions); - break; - default: - break; - } - - } - - return nFree; -} - -int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev) -{ - /* This is what we report to the outside world */ - - int nFree; - int nDirtyCacheChunks; - int blocksForCheckpoint; - -#if 1 - nFree = dev->nFreeChunks; -#else - nFree = yaffs_CountFreeChunks(dev); -#endif - - nFree += dev->nDeletedFiles; - - /* Now count the number of dirty chunks in the cache and subtract those */ - - { - int i; - for (nDirtyCacheChunks = 0, i = 0; i < dev->nShortOpCaches; i++) { - if (dev->srCache[i].dirty) - nDirtyCacheChunks++; - } - } - - nFree -= nDirtyCacheChunks; - - nFree -= ((dev->nReservedBlocks + 1) * dev->nChunksPerBlock); - - /* Now we figure out how much to reserve for the checkpoint and report that... */ - blocksForCheckpoint = dev->nCheckpointReservedBlocks - dev->blocksInCheckpoint; - if(blocksForCheckpoint < 0) - blocksForCheckpoint = 0; - - nFree -= (blocksForCheckpoint * dev->nChunksPerBlock); - - if (nFree < 0) - nFree = 0; - - return nFree; - -} - -static int yaffs_freeVerificationFailures; - -static void yaffs_VerifyFreeChunks(yaffs_Device * dev) -{ - int counted; - int difference; - - if(yaffs_SkipVerification(dev)) - return; - - counted = yaffs_CountFreeChunks(dev); - - difference = dev->nFreeChunks - counted; - - if (difference) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("Freechunks verification failure %d %d %d" TENDSTR), - dev->nFreeChunks, counted, difference)); - yaffs_freeVerificationFailures++; - } -} - -/*---------------------------------------- YAFFS test code ----------------------*/ - -#define yaffs_CheckStruct(structure,syze, name) \ - if(sizeof(structure) != syze) \ - { \ - T(YAFFS_TRACE_ALWAYS,(TSTR("%s should be %d but is %d\n" TENDSTR),\ - name,syze,sizeof(structure))); \ - return YAFFS_FAIL; \ - } - -static int yaffs_CheckStructures(void) -{ -/* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags") */ -/* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion") */ -/* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare") */ -#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG - yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode") -#endif - yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader") - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_guts.h b/fs/yaffs2/yaffs_guts.h deleted file mode 100644 index 1f75efd..0000000 --- a/fs/yaffs2/yaffs_guts.h +++ /dev/null @@ -1,908 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_GUTS_H__ -#define __YAFFS_GUTS_H__ - -#include "devextras.h" -#include "yportenv.h" - -#define YAFFS_OK 1 -#define YAFFS_FAIL 0 - -/* Give us a Y=0x59, - * Give us an A=0x41, - * Give us an FF=0xFF - * Give us an S=0x53 - * And what have we got... - */ -#define YAFFS_MAGIC 0x5941FF53 - -#define YAFFS_NTNODES_LEVEL0 16 -#define YAFFS_TNODES_LEVEL0_BITS 4 -#define YAFFS_TNODES_LEVEL0_MASK 0xf - -#define YAFFS_NTNODES_INTERNAL (YAFFS_NTNODES_LEVEL0 / 2) -#define YAFFS_TNODES_INTERNAL_BITS (YAFFS_TNODES_LEVEL0_BITS - 1) -#define YAFFS_TNODES_INTERNAL_MASK 0x7 -#define YAFFS_TNODES_MAX_LEVEL 6 - -#ifndef CONFIG_YAFFS_NO_YAFFS1 -#define YAFFS_BYTES_PER_SPARE 16 -#define YAFFS_BYTES_PER_CHUNK 512 -#define YAFFS_CHUNK_SIZE_SHIFT 9 -#define YAFFS_CHUNKS_PER_BLOCK 32 -#define YAFFS_BYTES_PER_BLOCK (YAFFS_CHUNKS_PER_BLOCK*YAFFS_BYTES_PER_CHUNK) -#endif - -#define YAFFS_MIN_YAFFS2_CHUNK_SIZE 1024 -#define YAFFS_MIN_YAFFS2_SPARE_SIZE 32 - -#define YAFFS_MAX_CHUNK_ID 0x000FFFFF - -#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF - -#define YAFFS_ALLOCATION_NOBJECTS 100 -#define YAFFS_ALLOCATION_NTNODES 100 -#define YAFFS_ALLOCATION_NLINKS 100 - -#define YAFFS_NOBJECT_BUCKETS 256 - - -#define YAFFS_OBJECT_SPACE 0x40000 - -#define YAFFS_CHECKPOINT_VERSION 3 - -#ifdef CONFIG_YAFFS_UNICODE -#define YAFFS_MAX_NAME_LENGTH 127 -#define YAFFS_MAX_ALIAS_LENGTH 79 -#else -#define YAFFS_MAX_NAME_LENGTH 255 -#define YAFFS_MAX_ALIAS_LENGTH 159 -#endif - -#define YAFFS_SHORT_NAME_LENGTH 15 - -/* Some special object ids for pseudo objects */ -#define YAFFS_OBJECTID_ROOT 1 -#define YAFFS_OBJECTID_LOSTNFOUND 2 -#define YAFFS_OBJECTID_UNLINKED 3 -#define YAFFS_OBJECTID_DELETED 4 - -/* Sseudo object ids for checkpointing */ -#define YAFFS_OBJECTID_SB_HEADER 0x10 -#define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20 -#define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21 - -/* */ - -#define YAFFS_MAX_SHORT_OP_CACHES 20 - -#define YAFFS_N_TEMP_BUFFERS 4 - -/* We limit the number attempts at sucessfully saving a chunk of data. - * Small-page devices have 32 pages per block; large-page devices have 64. - * Default to something in the order of 5 to 10 blocks worth of chunks. - */ -#define YAFFS_WR_ATTEMPTS (5*64) - -/* Sequence numbers are used in YAFFS2 to determine block allocation order. - * The range is limited slightly to help distinguish bad numbers from good. - * This also allows us to perhaps in the future use special numbers for - * special purposes. - * EFFFFF00 allows the allocation of 8 blocks per second (~1Mbytes) for 15 years, - * and is a larger number than the lifetime of a 2GB device. - */ -#define YAFFS_LOWEST_SEQUENCE_NUMBER 0x00001000 -#define YAFFS_HIGHEST_SEQUENCE_NUMBER 0xEFFFFF00 - -/* ChunkCache is used for short read/write operations.*/ -typedef struct { - struct yaffs_ObjectStruct *object; - int chunkId; - int lastUse; - int dirty; - int nBytes; /* Only valid if the cache is dirty */ - int locked; /* Can't push out or flush while locked. */ -#ifdef CONFIG_YAFFS_YAFFS2 - __u8 *data; -#else - __u8 data[YAFFS_BYTES_PER_CHUNK]; -#endif -} yaffs_ChunkCache; - - - -/* Tags structures in RAM - * NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise - * the structure size will get blown out. - */ - -#ifndef CONFIG_YAFFS_NO_YAFFS1 -typedef struct { - unsigned chunkId:20; - unsigned serialNumber:2; - unsigned byteCount:10; - unsigned objectId:18; - unsigned ecc:12; - unsigned unusedStuff:2; - -} yaffs_Tags; - -typedef union { - yaffs_Tags asTags; - __u8 asBytes[8]; -} yaffs_TagsUnion; - -#endif - -/* Stuff used for extended tags in YAFFS2 */ - -typedef enum { - YAFFS_ECC_RESULT_UNKNOWN, - YAFFS_ECC_RESULT_NO_ERROR, - YAFFS_ECC_RESULT_FIXED, - YAFFS_ECC_RESULT_UNFIXED -} yaffs_ECCResult; - -typedef enum { - YAFFS_OBJECT_TYPE_UNKNOWN, - YAFFS_OBJECT_TYPE_FILE, - YAFFS_OBJECT_TYPE_SYMLINK, - YAFFS_OBJECT_TYPE_DIRECTORY, - YAFFS_OBJECT_TYPE_HARDLINK, - YAFFS_OBJECT_TYPE_SPECIAL -} yaffs_ObjectType; - -#define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL - -typedef struct { - - unsigned validMarker0; - unsigned chunkUsed; /* Status of the chunk: used or unused */ - unsigned objectId; /* If 0 then this is not part of an object (unused) */ - unsigned chunkId; /* If 0 then this is a header, else a data chunk */ - unsigned byteCount; /* Only valid for data chunks */ - - /* The following stuff only has meaning when we read */ - yaffs_ECCResult eccResult; - unsigned blockBad; - - /* YAFFS 1 stuff */ - unsigned chunkDeleted; /* The chunk is marked deleted */ - unsigned serialNumber; /* Yaffs1 2-bit serial number */ - - /* YAFFS2 stuff */ - unsigned sequenceNumber; /* The sequence number of this block */ - - /* Extra info if this is an object header (YAFFS2 only) */ - - unsigned extraHeaderInfoAvailable; /* There is extra info available if this is not zero */ - unsigned extraParentObjectId; /* The parent object */ - unsigned extraIsShrinkHeader; /* Is it a shrink header? */ - unsigned extraShadows; /* Does this shadow another object? */ - - yaffs_ObjectType extraObjectType; /* What object type? */ - - unsigned extraFileLength; /* Length if it is a file */ - unsigned extraEquivalentObjectId; /* Equivalent object Id if it is a hard link */ - - unsigned validMarker1; - -} yaffs_ExtendedTags; - -/* Spare structure for YAFFS1 */ -typedef struct { - __u8 tagByte0; - __u8 tagByte1; - __u8 tagByte2; - __u8 tagByte3; - __u8 pageStatus; /* set to 0 to delete the chunk */ - __u8 blockStatus; - __u8 tagByte4; - __u8 tagByte5; - __u8 ecc1[3]; - __u8 tagByte6; - __u8 tagByte7; - __u8 ecc2[3]; -} yaffs_Spare; - -/*Special structure for passing through to mtd */ -struct yaffs_NANDSpare { - yaffs_Spare spare; - int eccres1; - int eccres2; -}; - -/* Block data in RAM */ - -typedef enum { - YAFFS_BLOCK_STATE_UNKNOWN = 0, - - YAFFS_BLOCK_STATE_SCANNING, - YAFFS_BLOCK_STATE_NEEDS_SCANNING, - /* The block might have something on it (ie it is allocating or full, perhaps empty) - * but it needs to be scanned to determine its true state. - * This state is only valid during yaffs_Scan. - * NB We tolerate empty because the pre-scanner might be incapable of deciding - * However, if this state is returned on a YAFFS2 device, then we expect a sequence number - */ - - YAFFS_BLOCK_STATE_EMPTY, - /* This block is empty */ - - YAFFS_BLOCK_STATE_ALLOCATING, - /* This block is partially allocated. - * At least one page holds valid data. - * This is the one currently being used for page - * allocation. Should never be more than one of these - */ - - YAFFS_BLOCK_STATE_FULL, - /* All the pages in this block have been allocated. - */ - - YAFFS_BLOCK_STATE_DIRTY, - /* All pages have been allocated and deleted. - * Erase me, reuse me. - */ - - YAFFS_BLOCK_STATE_CHECKPOINT, - /* This block is assigned to holding checkpoint data. - */ - - YAFFS_BLOCK_STATE_COLLECTING, - /* This block is being garbage collected */ - - YAFFS_BLOCK_STATE_DEAD - /* This block has failed and is not in use */ -} yaffs_BlockState; - -#define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1) - - -typedef struct { - - int softDeletions:10; /* number of soft deleted pages */ - int pagesInUse:10; /* number of pages in use */ - unsigned blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */ - __u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */ - /* and retire the block. */ - __u32 skipErasedCheck: 1; /* If this is set we can skip the erased check on this block */ - __u32 gcPrioritise: 1; /* An ECC check or blank check has failed on this block. - It should be prioritised for GC */ - __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */ - -#ifdef CONFIG_YAFFS_YAFFS2 - __u32 hasShrinkHeader:1; /* This block has at least one shrink object header */ - __u32 sequenceNumber; /* block sequence number for yaffs2 */ -#endif - -} yaffs_BlockInfo; - -/* -------------------------- Object structure -------------------------------*/ -/* This is the object structure as stored on NAND */ - -typedef struct { - yaffs_ObjectType type; - - /* Apply to everything */ - int parentObjectId; - __u16 sum__NoLongerUsed; /* checksum of name. No longer used */ - YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - - /* Thes following apply to directories, files, symlinks - not hard links */ - __u32 yst_mode; /* protection */ - -#ifdef CONFIG_YAFFS_WINCE - __u32 notForWinCE[5]; -#else - __u32 yst_uid; - __u32 yst_gid; - __u32 yst_atime; - __u32 yst_mtime; - __u32 yst_ctime; -#endif - - /* File size applies to files only */ - int fileSize; - - /* Equivalent object id applies to hard links only. */ - int equivalentObjectId; - - /* Alias is for symlinks only. */ - YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1]; - - __u32 yst_rdev; /* device stuff for block and char devices (major/min) */ - -#ifdef CONFIG_YAFFS_WINCE - __u32 win_ctime[2]; - __u32 win_atime[2]; - __u32 win_mtime[2]; - __u32 roomToGrow[4]; -#else - __u32 roomToGrow[10]; -#endif - - int shadowsObject; /* This object header shadows the specified object if > 0 */ - - /* isShrink applies to object headers written when we shrink the file (ie resize) */ - __u32 isShrink; - -} yaffs_ObjectHeader; - -/*--------------------------- Tnode -------------------------- */ - -union yaffs_Tnode_union { -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1]; -#else - union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL]; -#endif -/* __u16 level0[YAFFS_NTNODES_LEVEL0]; */ - -}; - -typedef union yaffs_Tnode_union yaffs_Tnode; - -struct yaffs_TnodeList_struct { - struct yaffs_TnodeList_struct *next; - yaffs_Tnode *tnodes; -}; - -typedef struct yaffs_TnodeList_struct yaffs_TnodeList; - -/*------------------------ Object -----------------------------*/ -/* An object can be one of: - * - a directory (no data, has children links - * - a regular file (data.... not prunes :->). - * - a symlink [symbolic link] (the alias). - * - a hard link - */ - -typedef struct { - __u32 fileSize; - __u32 scannedFileSize; - __u32 shrinkSize; - int topLevel; - yaffs_Tnode *top; -} yaffs_FileStructure; - -typedef struct { - struct list_head children; /* list of child links */ -} yaffs_DirectoryStructure; - -typedef struct { - YCHAR *alias; -} yaffs_SymLinkStructure; - -typedef struct { - struct yaffs_ObjectStruct *equivalentObject; - __u32 equivalentObjectId; -} yaffs_HardLinkStructure; - -typedef union { - yaffs_FileStructure fileVariant; - yaffs_DirectoryStructure directoryVariant; - yaffs_SymLinkStructure symLinkVariant; - yaffs_HardLinkStructure hardLinkVariant; -} yaffs_ObjectVariant; - -struct yaffs_ObjectStruct { - __u8 deleted:1; /* This should only apply to unlinked files. */ - __u8 softDeleted:1; /* it has also been soft deleted */ - __u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory.*/ - __u8 fake:1; /* A fake object has no presence on NAND. */ - __u8 renameAllowed:1; /* Some objects are not allowed to be renamed. */ - __u8 unlinkAllowed:1; - __u8 dirty:1; /* the object needs to be written to flash */ - __u8 valid:1; /* When the file system is being loaded up, this - * object might be created before the data - * is available (ie. file data records appear before the header). - */ - __u8 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */ - - __u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is - * still in the inode cache. Free of object is defered. - * until the inode is released. - */ - - __u8 serial; /* serial number of chunk in NAND. Cached here */ - __u16 sum; /* sum of the name to speed searching */ - - struct yaffs_DeviceStruct *myDev; /* The device I'm on */ - - struct list_head hashLink; /* list of objects in this hash bucket */ - - struct list_head hardLinks; /* all the equivalent hard linked objects */ - - /* directory structure stuff */ - /* also used for linking up the free list */ - struct yaffs_ObjectStruct *parent; - struct list_head siblings; - - /* Where's my object header in NAND? */ - int chunkId; - - int nDataChunks; /* Number of data chunks attached to the file. */ - - __u32 objectId; /* the object id value */ - - __u32 yst_mode; - -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1]; -#endif - -/* XXX U-BOOT XXX */ -/* #ifndef __KERNEL__ */ - __u32 inUse; -/* #endif */ - -#ifdef CONFIG_YAFFS_WINCE - __u32 win_ctime[2]; - __u32 win_mtime[2]; - __u32 win_atime[2]; -#else - __u32 yst_uid; - __u32 yst_gid; - __u32 yst_atime; - __u32 yst_mtime; - __u32 yst_ctime; -#endif - - __u32 yst_rdev; - -/* XXX U-BOOT XXX */ -/* #ifndef __KERNEL__ */ - struct inode *myInode; -/* #endif */ - - yaffs_ObjectType variantType; - - yaffs_ObjectVariant variant; - -}; - -typedef struct yaffs_ObjectStruct yaffs_Object; - -struct yaffs_ObjectList_struct { - yaffs_Object *objects; - struct yaffs_ObjectList_struct *next; -}; - -typedef struct yaffs_ObjectList_struct yaffs_ObjectList; - -typedef struct { - struct list_head list; - int count; -} yaffs_ObjectBucket; - - -/* yaffs_CheckpointObject holds the definition of an object as dumped - * by checkpointing. - */ - -typedef struct { - int structType; - __u32 objectId; - __u32 parentId; - int chunkId; - - yaffs_ObjectType variantType:3; - __u8 deleted:1; - __u8 softDeleted:1; - __u8 unlinked:1; - __u8 fake:1; - __u8 renameAllowed:1; - __u8 unlinkAllowed:1; - __u8 serial; - - int nDataChunks; - __u32 fileSizeOrEquivalentObjectId; - -}yaffs_CheckpointObject; - -/*--------------------- Temporary buffers ---------------- - * - * These are chunk-sized working buffers. Each device has a few - */ - -typedef struct { - __u8 *buffer; - int line; /* track from whence this buffer was allocated */ - int maxLine; -} yaffs_TempBuffer; - -/*----------------- Device ---------------------------------*/ - -struct yaffs_DeviceStruct { - struct list_head devList; - const char *name; - - /* Entry parameters set up way early. Yaffs sets up the rest.*/ - int nDataBytesPerChunk; /* Should be a power of 2 >= 512 */ - int nChunksPerBlock; /* does not need to be a power of 2 */ - int nBytesPerSpare; /* spare area size */ - int startBlock; /* Start block we're allowed to use */ - int endBlock; /* End block we're allowed to use */ - int nReservedBlocks; /* We want this tuneable so that we can reduce */ - /* reserved blocks on NOR and RAM. */ - - - /* Stuff used by the shared space checkpointing mechanism */ - /* If this value is zero, then this mechanism is disabled */ - - int nCheckpointReservedBlocks; /* Blocks to reserve for checkpoint data */ - - - - - int nShortOpCaches; /* If <= 0, then short op caching is disabled, else - * the number of short op caches (don't use too many) - */ - - int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */ - - int useNANDECC; /* Flag to decide whether or not to use NANDECC */ - - void *genericDevice; /* Pointer to device context - * On an mtd this holds the mtd pointer. - */ - void *superBlock; - - /* NAND access functions (Must be set before calling YAFFS)*/ - - int (*writeChunkToNAND) (struct yaffs_DeviceStruct * dev, - int chunkInNAND, const __u8 * data, - const yaffs_Spare * spare); - int (*readChunkFromNAND) (struct yaffs_DeviceStruct * dev, - int chunkInNAND, __u8 * data, - yaffs_Spare * spare); - int (*eraseBlockInNAND) (struct yaffs_DeviceStruct * dev, - int blockInNAND); - int (*initialiseNAND) (struct yaffs_DeviceStruct * dev); - -#ifdef CONFIG_YAFFS_YAFFS2 - int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct * dev, - int chunkInNAND, const __u8 * data, - const yaffs_ExtendedTags * tags); - int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct * dev, - int chunkInNAND, __u8 * data, - yaffs_ExtendedTags * tags); - int (*markNANDBlockBad) (struct yaffs_DeviceStruct * dev, int blockNo); - int (*queryNANDBlock) (struct yaffs_DeviceStruct * dev, int blockNo, - yaffs_BlockState * state, int *sequenceNumber); -#endif - - int isYaffs2; - - /* The removeObjectCallback function must be supplied by OS flavours that - * need it. The Linux kernel does not use this, but yaffs direct does use - * it to implement the faster readdir - */ - void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj); - - /* Callback to mark the superblock dirsty */ - void (*markSuperBlockDirty)(void * superblock); - - int wideTnodesDisabled; /* Set to disable wide tnodes */ - - - /* End of stuff that must be set before initialisation. */ - - /* Checkpoint control. Can be set before or after initialisation */ - __u8 skipCheckpointRead; - __u8 skipCheckpointWrite; - - /* Runtime parameters. Set up by YAFFS. */ - - __u16 chunkGroupBits; /* 0 for devices <= 32MB. else log2(nchunks) - 16 */ - __u16 chunkGroupSize; /* == 2^^chunkGroupBits */ - - /* Stuff to support wide tnodes */ - __u32 tnodeWidth; - __u32 tnodeMask; - - /* Stuff to support various file offses to chunk/offset translations */ - /* "Crumbs" for nDataBytesPerChunk not being a power of 2 */ - __u32 crumbMask; - __u32 crumbShift; - __u32 crumbsPerChunk; - - /* Straight shifting for nDataBytesPerChunk being a power of 2 */ - __u32 chunkShift; - __u32 chunkMask; - - -/* XXX U-BOOT XXX */ -#if 0 -#ifndef __KERNEL__ - - struct semaphore sem; /* Semaphore for waiting on erasure.*/ - struct semaphore grossLock; /* Gross locking semaphore */ - void (*putSuperFunc) (struct super_block * sb); -#endif -#endif - __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer - * at compile time so we have to allocate it. - */ - - int isMounted; - - int isCheckpointed; - - - /* Stuff to support block offsetting to support start block zero */ - int internalStartBlock; - int internalEndBlock; - int blockOffset; - int chunkOffset; - - - /* Runtime checkpointing stuff */ - int checkpointPageSequence; /* running sequence number of checkpoint pages */ - int checkpointByteCount; - int checkpointByteOffset; - __u8 *checkpointBuffer; - int checkpointOpenForWrite; - int blocksInCheckpoint; - int checkpointCurrentChunk; - int checkpointCurrentBlock; - int checkpointNextBlock; - int *checkpointBlockList; - int checkpointMaxBlocks; - __u32 checkpointSum; - __u32 checkpointXor; - - /* Block Info */ - yaffs_BlockInfo *blockInfo; - __u8 *chunkBits; /* bitmap of chunks in use */ - unsigned blockInfoAlt:1; /* was allocated using alternative strategy */ - unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */ - int chunkBitmapStride; /* Number of bytes of chunkBits per block. - * Must be consistent with nChunksPerBlock. - */ - - int nErasedBlocks; - int allocationBlock; /* Current block being allocated off */ - __u32 allocationPage; - int allocationBlockFinder; /* Used to search for next allocation block */ - - /* Runtime state */ - int nTnodesCreated; - yaffs_Tnode *freeTnodes; - int nFreeTnodes; - yaffs_TnodeList *allocatedTnodeList; - - int isDoingGC; - - int nObjectsCreated; - yaffs_Object *freeObjects; - int nFreeObjects; - - yaffs_ObjectList *allocatedObjectList; - - yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS]; - - int nFreeChunks; - - int currentDirtyChecker; /* Used to find current dirtiest block */ - - __u32 *gcCleanupList; /* objects to delete at the end of a GC. */ - int nonAggressiveSkip; /* GC state/mode */ - - /* Statistcs */ - int nPageWrites; - int nPageReads; - int nBlockErasures; - int nErasureFailures; - int nGCCopies; - int garbageCollections; - int passiveGarbageCollections; - int nRetriedWrites; - int nRetiredBlocks; - int eccFixed; - int eccUnfixed; - int tagsEccFixed; - int tagsEccUnfixed; - int nDeletions; - int nUnmarkedDeletions; - - int hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */ - - /* Special directories */ - yaffs_Object *rootDir; - yaffs_Object *lostNFoundDir; - - /* Buffer areas for storing data to recover from write failures TODO - * __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK]; - * yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK]; - */ - - int bufferedBlock; /* Which block is buffered here? */ - int doingBufferedBlockRewrite; - - yaffs_ChunkCache *srCache; - int srLastUse; - - int cacheHits; - - /* Stuff for background deletion and unlinked files.*/ - yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */ - yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */ - yaffs_Object *unlinkedDeletion; /* Current file being background deleted.*/ - int nDeletedFiles; /* Count of files awaiting deletion;*/ - int nUnlinkedFiles; /* Count of unlinked files. */ - int nBackgroundDeletions; /* Count of background deletions. */ - - - yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS]; - int maxTemp; - int unmanagedTempAllocations; - int unmanagedTempDeallocations; - - /* yaffs2 runtime stuff */ - unsigned sequenceNumber; /* Sequence number of currently allocating block */ - unsigned oldestDirtySequence; - -}; - -typedef struct yaffs_DeviceStruct yaffs_Device; - -/* The static layout of bllock usage etc is stored in the super block header */ -typedef struct { - int StructType; - int version; - int checkpointStartBlock; - int checkpointEndBlock; - int startBlock; - int endBlock; - int rfu[100]; -} yaffs_SuperBlockHeader; - -/* The CheckpointDevice structure holds the device information that changes at runtime and - * must be preserved over unmount/mount cycles. - */ -typedef struct { - int structType; - int nErasedBlocks; - int allocationBlock; /* Current block being allocated off */ - __u32 allocationPage; - int nFreeChunks; - - int nDeletedFiles; /* Count of files awaiting deletion;*/ - int nUnlinkedFiles; /* Count of unlinked files. */ - int nBackgroundDeletions; /* Count of background deletions. */ - - /* yaffs2 runtime stuff */ - unsigned sequenceNumber; /* Sequence number of currently allocating block */ - unsigned oldestDirtySequence; - -} yaffs_CheckpointDevice; - - -typedef struct { - int structType; - __u32 magic; - __u32 version; - __u32 head; -} yaffs_CheckpointValidity; - -/* Function to manipulate block info */ -static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk) -{ - if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR), - blk)); - YBUG(); - } - return &dev->blockInfo[blk - dev->internalStartBlock]; -} - -/*----------------------- YAFFS Functions -----------------------*/ - -int yaffs_GutsInitialise(yaffs_Device * dev); -void yaffs_Deinitialise(yaffs_Device * dev); - -int yaffs_GetNumberOfFreeChunks(yaffs_Device * dev); - -int yaffs_RenameObject(yaffs_Object * oldDir, const YCHAR * oldName, - yaffs_Object * newDir, const YCHAR * newName); - -int yaffs_Unlink(yaffs_Object * dir, const YCHAR * name); -int yaffs_DeleteFile(yaffs_Object * obj); - -int yaffs_GetObjectName(yaffs_Object * obj, YCHAR * name, int buffSize); -int yaffs_GetObjectFileLength(yaffs_Object * obj); -int yaffs_GetObjectInode(yaffs_Object * obj); -unsigned yaffs_GetObjectType(yaffs_Object * obj); -int yaffs_GetObjectLinkCount(yaffs_Object * obj); - -int yaffs_SetAttributes(yaffs_Object * obj, struct iattr *attr); -int yaffs_GetAttributes(yaffs_Object * obj, struct iattr *attr); - -/* File operations */ -int yaffs_ReadDataFromFile(yaffs_Object * obj, __u8 * buffer, loff_t offset, - int nBytes); -int yaffs_WriteDataToFile(yaffs_Object * obj, const __u8 * buffer, loff_t offset, - int nBytes, int writeThrough); -int yaffs_ResizeFile(yaffs_Object * obj, loff_t newSize); - -yaffs_Object *yaffs_MknodFile(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid); -int yaffs_FlushFile(yaffs_Object * obj, int updateTime); - -/* Flushing and checkpointing */ -void yaffs_FlushEntireDeviceCache(yaffs_Device *dev); - -int yaffs_CheckpointSave(yaffs_Device *dev); -int yaffs_CheckpointRestore(yaffs_Device *dev); - -/* Directory operations */ -yaffs_Object *yaffs_MknodDirectory(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid); -yaffs_Object *yaffs_FindObjectByName(yaffs_Object * theDir, const YCHAR * name); -int yaffs_ApplyToDirectoryChildren(yaffs_Object * theDir, - int (*fn) (yaffs_Object *)); - -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device * dev, __u32 number); - -/* Link operations */ -yaffs_Object *yaffs_Link(yaffs_Object * parent, const YCHAR * name, - yaffs_Object * equivalentObject); - -yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object * obj); - -/* Symlink operations */ -yaffs_Object *yaffs_MknodSymLink(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, - const YCHAR * alias); -YCHAR *yaffs_GetSymlinkAlias(yaffs_Object * obj); - -/* Special inodes (fifos, sockets and devices) */ -yaffs_Object *yaffs_MknodSpecial(yaffs_Object * parent, const YCHAR * name, - __u32 mode, __u32 uid, __u32 gid, __u32 rdev); - -/* Special directories */ -yaffs_Object *yaffs_Root(yaffs_Device * dev); -yaffs_Object *yaffs_LostNFound(yaffs_Device * dev); - -#ifdef CONFIG_YAFFS_WINCE -/* CONFIG_YAFFS_WINCE special stuff */ -void yfsd_WinFileTimeNow(__u32 target[2]); -#endif - -/* XXX U-BOOT XXX */ -#if 0 -#ifndef __KERNEL__ -void yaffs_HandleDeferedFree(yaffs_Object * obj); -#endif -#endif - -/* Debug dump */ -int yaffs_DumpObject(yaffs_Object * obj); - -void yaffs_GutsTest(yaffs_Device * dev); - -/* A few useful functions */ -void yaffs_InitialiseTags(yaffs_ExtendedTags * tags); -void yaffs_DeleteChunk(yaffs_Device * dev, int chunkId, int markNAND, int lyn); -int yaffs_CheckFF(__u8 * buffer, int nBytes); -void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi); - -#endif diff --git a/fs/yaffs2/yaffs_malloc.h b/fs/yaffs2/yaffs_malloc.h deleted file mode 100644 index 3ed6175..0000000 --- a/fs/yaffs2/yaffs_malloc.h +++ /dev/null @@ -1,25 +0,0 @@ -#ifndef __YAFFS_MALLOC_H__ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* XXX U-BOOT XXX */ -#if 0 -#include <stdlib.h> -#endif - -void *yaffs_malloc(size_t size); -void yaffs_free(void *ptr); - -#endif diff --git a/fs/yaffs2/yaffs_mtdif.c b/fs/yaffs2/yaffs_mtdif.c deleted file mode 100644 index d0e16d0..0000000 --- a/fs/yaffs2/yaffs_mtdif.c +++ /dev/null @@ -1,246 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -const char *yaffs_mtdif_c_version = - "$Id: yaffs_mtdif.c,v 1.19 2007/02/14 01:09:06 wookey Exp $"; - -#include "yportenv.h" - - -#include "yaffs_mtdif.h" - -#include "linux/mtd/mtd.h" -#include "linux/types.h" -#include "linux/time.h" -#include "linux/mtd/nand.h" - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)) -static struct nand_oobinfo yaffs_oobinfo = { - .useecc = 1, - .eccbytes = 6, - .eccpos = {8, 9, 10, 13, 14, 15} -}; - -static struct nand_oobinfo yaffs_noeccinfo = { - .useecc = 0, -}; -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) -static inline void translate_spare2oob(const yaffs_Spare *spare, __u8 *oob) -{ - oob[0] = spare->tagByte0; - oob[1] = spare->tagByte1; - oob[2] = spare->tagByte2; - oob[3] = spare->tagByte3; - oob[4] = spare->tagByte4; - oob[5] = spare->tagByte5 & 0x3f; - oob[5] |= spare->blockStatus == 'Y' ? 0: 0x80; - oob[5] |= spare->pageStatus == 0 ? 0: 0x40; - oob[6] = spare->tagByte6; - oob[7] = spare->tagByte7; -} - -static inline void translate_oob2spare(yaffs_Spare *spare, __u8 *oob) -{ - struct yaffs_NANDSpare *nspare = (struct yaffs_NANDSpare *)spare; - spare->tagByte0 = oob[0]; - spare->tagByte1 = oob[1]; - spare->tagByte2 = oob[2]; - spare->tagByte3 = oob[3]; - spare->tagByte4 = oob[4]; - spare->tagByte5 = oob[5] == 0xff ? 0xff : oob[5] & 0x3f; - spare->blockStatus = oob[5] & 0x80 ? 0xff : 'Y'; - spare->pageStatus = oob[5] & 0x40 ? 0xff : 0; - spare->ecc1[0] = spare->ecc1[1] = spare->ecc1[2] = 0xff; - spare->tagByte6 = oob[6]; - spare->tagByte7 = oob[7]; - spare->ecc2[0] = spare->ecc2[1] = spare->ecc2[2] = 0xff; - - nspare->eccres1 = nspare->eccres2 = 0; /* FIXME */ -} -#endif - -int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, const yaffs_Spare * spare) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - struct mtd_oob_ops ops; -#endif - size_t dummy; - int retval = 0; - - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - __u8 spareAsBytes[8]; /* OOB */ - - if (data && !spare) - retval = mtd->write(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data); - else if (spare) { - if (dev->useNANDECC) { - translate_spare2oob(spare, spareAsBytes); - ops.mode = MTD_OOB_AUTO; - ops.ooblen = 8; /* temp hack */ - } else { - ops.mode = MTD_OOB_RAW; - ops.ooblen = YAFFS_BYTES_PER_SPARE; - } - ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; - ops.datbuf = (u8 *)data; - ops.ooboffs = 0; - ops.oobbuf = spareAsBytes; - retval = mtd->write_oob(mtd, addr, &ops); - } -#else - __u8 *spareAsBytes = (__u8 *) spare; - - if (data && spare) { - if (dev->useNANDECC) - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_oobinfo); - else - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_noeccinfo); - } else { - if (data) - retval = - mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (spare) - retval = - mtd->write_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, - &dummy, spareAsBytes); - } -#endif - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data, - yaffs_Spare * spare) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - struct mtd_oob_ops ops; -#endif - size_t dummy; - int retval = 0; - - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - __u8 spareAsBytes[8]; /* OOB */ - - if (data && !spare) - retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data); - else if (spare) { - if (dev->useNANDECC) { - ops.mode = MTD_OOB_AUTO; - ops.ooblen = 8; /* temp hack */ - } else { - ops.mode = MTD_OOB_RAW; - ops.ooblen = YAFFS_BYTES_PER_SPARE; - } - ops.len = data ? dev->nDataBytesPerChunk : ops.ooblen; - ops.datbuf = data; - ops.ooboffs = 0; - ops.oobbuf = spareAsBytes; - retval = mtd->read_oob(mtd, addr, &ops); - if (dev->useNANDECC) - translate_oob2spare(spare, spareAsBytes); - } -#else - __u8 *spareAsBytes = (__u8 *) spare; - - if (data && spare) { - if (dev->useNANDECC) { - /* Careful, this call adds 2 ints */ - /* to the end of the spare data. Calling function */ - /* should allocate enough memory for spare, */ - /* i.e. [YAFFS_BYTES_PER_SPARE+2*sizeof(int)]. */ - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_oobinfo); - } else { - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, spareAsBytes, - &yaffs_noeccinfo); - } - } else { - if (data) - retval = - mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (spare) - retval = - mtd->read_oob(mtd, addr, YAFFS_BYTES_PER_SPARE, - &dummy, spareAsBytes); - } -#endif - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); - __u32 addr = - ((loff_t) blockNumber) * dev->nDataBytesPerChunk - * dev->nChunksPerBlock; - struct erase_info ei; - int retval = 0; - - ei.mtd = mtd; - ei.addr = addr; - ei.len = dev->nDataBytesPerChunk * dev->nChunksPerBlock; - ei.time = 1000; - ei.retries = 2; - ei.callback = NULL; - ei.priv = (u_long) dev; - - /* Todo finish off the ei if required */ - -/* XXX U-BOOT XXX */ -#if 0 - sema_init(&dev->sem, 0); -#endif - - retval = mtd->erase(mtd, &ei); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd_InitialiseNAND(yaffs_Device * dev) -{ - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_mtdif.h b/fs/yaffs2/yaffs_mtdif.h deleted file mode 100644 index 317600c..0000000 --- a/fs/yaffs2/yaffs_mtdif.h +++ /dev/null @@ -1,27 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_MTDIF_H__ -#define __YAFFS_MTDIF_H__ - -#include "yaffs_guts.h" - -int nandmtd_WriteChunkToNAND(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, const yaffs_Spare * spare); -int nandmtd_ReadChunkFromNAND(yaffs_Device * dev, int chunkInNAND, __u8 * data, - yaffs_Spare * spare); -int nandmtd_EraseBlockInNAND(yaffs_Device * dev, int blockNumber); -int nandmtd_InitialiseNAND(yaffs_Device * dev); -#endif diff --git a/fs/yaffs2/yaffs_mtdif2.c b/fs/yaffs2/yaffs_mtdif2.c deleted file mode 100644 index f569b99..0000000 --- a/fs/yaffs2/yaffs_mtdif2.c +++ /dev/null @@ -1,235 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* mtd interface for YAFFS2 */ - -/* XXX U-BOOT XXX */ -#include <common.h> -#include "asm/errno.h" - -const char *yaffs_mtdif2_c_version = - "$Id: yaffs_mtdif2.c,v 1.17 2007/02/14 01:09:06 wookey Exp $"; - -#include "yportenv.h" - - -#include "yaffs_mtdif2.h" - -#include "linux/mtd/mtd.h" -#include "linux/types.h" -#include "linux/time.h" - -#include "yaffs_packedtags2.h" - -int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - struct mtd_oob_ops ops; -#else - size_t dummy; -#endif - int retval = 0; - - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; - - yaffs_PackedTags2 pt; - - T(YAFFS_TRACE_MTD, - (TSTR - ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p" - TENDSTR), chunkInNAND, data, tags)); - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - if (tags) - yaffs_PackTags2(&pt, tags); - else - BUG(); /* both tags and data should always be present */ - - if (data) { - ops.mode = MTD_OOB_AUTO; - ops.ooblen = sizeof(pt); - ops.len = dev->nDataBytesPerChunk; - ops.ooboffs = 0; - ops.datbuf = (__u8 *)data; - ops.oobbuf = (void *)&pt; - retval = mtd->write_oob(mtd, addr, &ops); - } else - BUG(); /* both tags and data should always be present */ -#else - if (tags) { - yaffs_PackTags2(&pt, tags); - } - - if (data && tags) { - if (dev->useNANDECC) - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, (__u8 *) & pt, NULL); - else - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, (__u8 *) & pt, NULL); - } else { - if (data) - retval = - mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (tags) - retval = - mtd->write_oob(mtd, addr, mtd->oobsize, &dummy, - (__u8 *) & pt); - - } -#endif - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, - __u8 * data, yaffs_ExtendedTags * tags) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - struct mtd_oob_ops ops; -#endif - size_t dummy; - int retval = 0; - - loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; - - yaffs_PackedTags2 pt; - - T(YAFFS_TRACE_MTD, - (TSTR - ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p" - TENDSTR), chunkInNAND, data, tags)); - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - if (data && !tags) - retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data); - else if (tags) { - ops.mode = MTD_OOB_AUTO; - ops.ooblen = sizeof(pt); - ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt); - ops.ooboffs = 0; - ops.datbuf = data; - ops.oobbuf = dev->spareBuffer; - retval = mtd->read_oob(mtd, addr, &ops); - } -#else - if (data && tags) { - if (dev->useNANDECC) { - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, dev->spareBuffer, - NULL); - } else { - retval = - mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, dev->spareBuffer, - NULL); - } - } else { - if (data) - retval = - mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (tags) - retval = - mtd->read_oob(mtd, addr, mtd->oobsize, &dummy, - dev->spareBuffer); - } -#endif - - memcpy(&pt, dev->spareBuffer, sizeof(pt)); - - if (tags) - yaffs_UnpackTags2(tags, &pt); - - if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) - tags->eccResult = YAFFS_ECC_RESULT_UNFIXED; - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} - -int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); - int retval; - T(YAFFS_TRACE_MTD, - (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo)); - - retval = - mtd->block_markbad(mtd, - blockNo * dev->nChunksPerBlock * - dev->nDataBytesPerChunk); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; - -} - -int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState * state, int *sequenceNumber) -{ - struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); - int retval; - - T(YAFFS_TRACE_MTD, - (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo)); - retval = - mtd->block_isbad(mtd, - blockNo * dev->nChunksPerBlock * - dev->nDataBytesPerChunk); - - if (retval) { - T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR))); - - *state = YAFFS_BLOCK_STATE_DEAD; - *sequenceNumber = 0; - } else { - yaffs_ExtendedTags t; - nandmtd2_ReadChunkWithTagsFromNAND(dev, - blockNo * - dev->nChunksPerBlock, NULL, - &t); - - if (t.chunkUsed) { - *sequenceNumber = t.sequenceNumber; - *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; - } else { - *sequenceNumber = 0; - *state = YAFFS_BLOCK_STATE_EMPTY; - } - } - T(YAFFS_TRACE_MTD, - (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber, - *state)); - - if (retval == 0) - return YAFFS_OK; - else - return YAFFS_FAIL; -} diff --git a/fs/yaffs2/yaffs_mtdif2.h b/fs/yaffs2/yaffs_mtdif2.h deleted file mode 100644 index b67ba52..0000000 --- a/fs/yaffs2/yaffs_mtdif2.h +++ /dev/null @@ -1,29 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_MTDIF2_H__ -#define __YAFFS_MTDIF2_H__ - -#include "yaffs_guts.h" -int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * tags); -int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, - __u8 * data, yaffs_ExtendedTags * tags); -int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState * state, int *sequenceNumber); - -#endif diff --git a/fs/yaffs2/yaffs_nand.c b/fs/yaffs2/yaffs_nand.c deleted file mode 100644 index ce048cc..0000000 --- a/fs/yaffs2/yaffs_nand.c +++ /dev/null @@ -1,134 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -const char *yaffs_nand_c_version = - "$Id: yaffs_nand.c,v 1.7 2007/02/14 01:09:06 wookey Exp $"; - -#include "yaffs_nand.h" -#include "yaffs_tagscompat.h" -#include "yaffs_tagsvalidity.h" - - -int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, - __u8 * buffer, - yaffs_ExtendedTags * tags) -{ - int result; - yaffs_ExtendedTags localTags; - - int realignedChunkInNAND = chunkInNAND - dev->chunkOffset; - - /* If there are no tags provided, use local tags to get prioritised gc working */ - if(!tags) - tags = &localTags; - - if (dev->readChunkWithTagsFromNAND) - result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer, - tags); - else - result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev, - realignedChunkInNAND, - buffer, - tags); - if(tags && - tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){ - - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock); - yaffs_HandleChunkError(dev,bi); - } - - return result; -} - -int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * buffer, - yaffs_ExtendedTags * tags) -{ - chunkInNAND -= dev->chunkOffset; - - - if (tags) { - tags->sequenceNumber = dev->sequenceNumber; - tags->chunkUsed = 1; - if (!yaffs_ValidateTags(tags)) { - T(YAFFS_TRACE_ERROR, - (TSTR("Writing uninitialised tags" TENDSTR))); - YBUG(); - } - T(YAFFS_TRACE_WRITE, - (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND, - tags->objectId, tags->chunkId)); - } else { - T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR))); - YBUG(); - } - - if (dev->writeChunkWithTagsToNAND) - return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer, - tags); - else - return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev, - chunkInNAND, - buffer, - tags); -} - -int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo) -{ - blockNo -= dev->blockOffset; - -; - if (dev->markNANDBlockBad) - return dev->markNANDBlockBad(dev, blockNo); - else - return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo); -} - -int yaffs_QueryInitialBlockState(yaffs_Device * dev, - int blockNo, - yaffs_BlockState * state, - int *sequenceNumber) -{ - blockNo -= dev->blockOffset; - - if (dev->queryNANDBlock) - return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber); - else - return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo, - state, - sequenceNumber); -} - - -int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND) -{ - int result; - - blockInNAND -= dev->blockOffset; - - - dev->nBlockErasures++; - result = dev->eraseBlockInNAND(dev, blockInNAND); - - return result; -} - -int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) -{ - return dev->initialiseNAND(dev); -} diff --git a/fs/yaffs2/yaffs_nand.h b/fs/yaffs2/yaffs_nand.h deleted file mode 100644 index f3bedcf..0000000 --- a/fs/yaffs2/yaffs_nand.h +++ /dev/null @@ -1,43 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_NAND_H__ -#define __YAFFS_NAND_H__ -#include "yaffs_guts.h" - - - -int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, - __u8 * buffer, - yaffs_ExtendedTags * tags); - -int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * buffer, - yaffs_ExtendedTags * tags); - -int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo); - -int yaffs_QueryInitialBlockState(yaffs_Device * dev, - int blockNo, - yaffs_BlockState * state, - int *sequenceNumber); - -int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND); - -int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev); - -#endif diff --git a/fs/yaffs2/yaffs_nandemul2k.h b/fs/yaffs2/yaffs_nandemul2k.h deleted file mode 100644 index cd2e96f..0000000 --- a/fs/yaffs2/yaffs_nandemul2k.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* Interface to emulated NAND functions (2k page size) */ - -#ifndef __YAFFS_NANDEMUL2K_H__ -#define __YAFFS_NANDEMUL2K_H__ - -#include "yaffs_guts.h" - -int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, const __u8 * data, - yaffs_ExtendedTags * tags); -int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, __u8 * data, - yaffs_ExtendedTags * tags); -int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState * state, int *sequenceNumber); -int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND); -int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev); -int nandemul2k_GetBytesPerChunk(void); -int nandemul2k_GetChunksPerBlock(void); -int nandemul2k_GetNumberOfBlocks(void); - -#endif diff --git a/fs/yaffs2/yaffs_packedtags1.c b/fs/yaffs2/yaffs_packedtags1.c deleted file mode 100644 index a149431..0000000 --- a/fs/yaffs2/yaffs_packedtags1.c +++ /dev/null @@ -1,55 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -#include "yaffs_packedtags1.h" -#include "yportenv.h" - -void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t) -{ - pt->chunkId = t->chunkId; - pt->serialNumber = t->serialNumber; - pt->byteCount = t->byteCount; - pt->objectId = t->objectId; - pt->ecc = 0; - pt->deleted = (t->chunkDeleted) ? 0 : 1; - pt->unusedStuff = 0; - pt->shouldBeFF = 0xFFFFFFFF; - -} - -void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt) -{ - static const __u8 allFF[] = - { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, -0xff }; - - if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) { - t->blockBad = 0; - if (pt->shouldBeFF != 0xFFFFFFFF) { - t->blockBad = 1; - } - t->chunkUsed = 1; - t->objectId = pt->objectId; - t->chunkId = pt->chunkId; - t->byteCount = pt->byteCount; - t->eccResult = YAFFS_ECC_RESULT_NO_ERROR; - t->chunkDeleted = (pt->deleted) ? 0 : 1; - t->serialNumber = pt->serialNumber; - } else { - memset(t, 0, sizeof(yaffs_ExtendedTags)); - - } -} diff --git a/fs/yaffs2/yaffs_packedtags1.h b/fs/yaffs2/yaffs_packedtags1.h deleted file mode 100644 index 776c5c2..0000000 --- a/fs/yaffs2/yaffs_packedtags1.h +++ /dev/null @@ -1,37 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* This is used to pack YAFFS1 tags, not YAFFS2 tags. */ - -#ifndef __YAFFS_PACKEDTAGS1_H__ -#define __YAFFS_PACKEDTAGS1_H__ - -#include "yaffs_guts.h" - -typedef struct { - unsigned chunkId:20; - unsigned serialNumber:2; - unsigned byteCount:10; - unsigned objectId:18; - unsigned ecc:12; - unsigned deleted:1; - unsigned unusedStuff:1; - unsigned shouldBeFF; - -} yaffs_PackedTags1; - -void yaffs_PackTags1(yaffs_PackedTags1 * pt, const yaffs_ExtendedTags * t); -void yaffs_UnpackTags1(yaffs_ExtendedTags * t, const yaffs_PackedTags1 * pt); -#endif diff --git a/fs/yaffs2/yaffs_packedtags2.c b/fs/yaffs2/yaffs_packedtags2.c deleted file mode 100644 index 4744009..0000000 --- a/fs/yaffs2/yaffs_packedtags2.c +++ /dev/null @@ -1,185 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -#include "yaffs_packedtags2.h" -#include "yportenv.h" -#include "yaffs_tagsvalidity.h" - -/* This code packs a set of extended tags into a binary structure for - * NAND storage - */ - -/* Some of the information is "extra" struff which can be packed in to - * speed scanning - * This is defined by having the EXTRA_HEADER_INFO_FLAG set. - */ - -/* Extra flags applied to chunkId */ - -#define EXTRA_HEADER_INFO_FLAG 0x80000000 -#define EXTRA_SHRINK_FLAG 0x40000000 -#define EXTRA_SHADOWS_FLAG 0x20000000 -#define EXTRA_SPARE_FLAGS 0x10000000 - -#define ALL_EXTRA_FLAGS 0xF0000000 - -/* Also, the top 4 bits of the object Id are set to the object type. */ -#define EXTRA_OBJECT_TYPE_SHIFT (28) -#define EXTRA_OBJECT_TYPE_MASK ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT) - -static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 * pt) -{ - T(YAFFS_TRACE_MTD, - (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR), - pt->t.objectId, pt->t.chunkId, pt->t.byteCount, - pt->t.sequenceNumber)); -} - -static void yaffs_DumpTags2(const yaffs_ExtendedTags * t) -{ - T(YAFFS_TRACE_MTD, - (TSTR - ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte " - "%d del %d ser %d seq %d" - TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId, - t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber, - t->sequenceNumber)); - -} - -void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t) -{ - pt->t.chunkId = t->chunkId; - pt->t.sequenceNumber = t->sequenceNumber; - pt->t.byteCount = t->byteCount; - pt->t.objectId = t->objectId; - - if (t->chunkId == 0 && t->extraHeaderInfoAvailable) { - /* Store the extra header info instead */ - /* We save the parent object in the chunkId */ - pt->t.chunkId = EXTRA_HEADER_INFO_FLAG - | t->extraParentObjectId; - if (t->extraIsShrinkHeader) { - pt->t.chunkId |= EXTRA_SHRINK_FLAG; - } - if (t->extraShadows) { - pt->t.chunkId |= EXTRA_SHADOWS_FLAG; - } - - pt->t.objectId &= ~EXTRA_OBJECT_TYPE_MASK; - pt->t.objectId |= - (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT); - - if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) { - pt->t.byteCount = t->extraEquivalentObjectId; - } else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE) { - pt->t.byteCount = t->extraFileLength; - } else { - pt->t.byteCount = 0; - } - } - - yaffs_DumpPackedTags2(pt); - yaffs_DumpTags2(t); - -#ifndef YAFFS_IGNORE_TAGS_ECC - { - yaffs_ECCCalculateOther((unsigned char *)&pt->t, - sizeof(yaffs_PackedTags2TagsPart), - &pt->ecc); - } -#endif -} - -void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt) -{ - - memset(t, 0, sizeof(yaffs_ExtendedTags)); - - yaffs_InitialiseTags(t); - - if (pt->t.sequenceNumber != 0xFFFFFFFF) { - /* Page is in use */ -#ifdef YAFFS_IGNORE_TAGS_ECC - { - t->eccResult = YAFFS_ECC_RESULT_NO_ERROR; - } -#else - { - yaffs_ECCOther ecc; - int result; - yaffs_ECCCalculateOther((unsigned char *)&pt->t, - sizeof - (yaffs_PackedTags2TagsPart), - &ecc); - result = - yaffs_ECCCorrectOther((unsigned char *)&pt->t, - sizeof - (yaffs_PackedTags2TagsPart), - &pt->ecc, &ecc); - switch(result){ - case 0: - t->eccResult = YAFFS_ECC_RESULT_NO_ERROR; - break; - case 1: - t->eccResult = YAFFS_ECC_RESULT_FIXED; - break; - case -1: - t->eccResult = YAFFS_ECC_RESULT_UNFIXED; - break; - default: - t->eccResult = YAFFS_ECC_RESULT_UNKNOWN; - } - } -#endif - t->blockBad = 0; - t->chunkUsed = 1; - t->objectId = pt->t.objectId; - t->chunkId = pt->t.chunkId; - t->byteCount = pt->t.byteCount; - t->chunkDeleted = 0; - t->serialNumber = 0; - t->sequenceNumber = pt->t.sequenceNumber; - - /* Do extra header info stuff */ - - if (pt->t.chunkId & EXTRA_HEADER_INFO_FLAG) { - t->chunkId = 0; - t->byteCount = 0; - - t->extraHeaderInfoAvailable = 1; - t->extraParentObjectId = - pt->t.chunkId & (~(ALL_EXTRA_FLAGS)); - t->extraIsShrinkHeader = - (pt->t.chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0; - t->extraShadows = - (pt->t.chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0; - t->extraObjectType = - pt->t.objectId >> EXTRA_OBJECT_TYPE_SHIFT; - t->objectId &= ~EXTRA_OBJECT_TYPE_MASK; - - if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) { - t->extraEquivalentObjectId = pt->t.byteCount; - } else { - t->extraFileLength = pt->t.byteCount; - } - } - } - - yaffs_DumpPackedTags2(pt); - yaffs_DumpTags2(t); - -} diff --git a/fs/yaffs2/yaffs_packedtags2.h b/fs/yaffs2/yaffs_packedtags2.h deleted file mode 100644 index c2242ff..0000000 --- a/fs/yaffs2/yaffs_packedtags2.h +++ /dev/null @@ -1,38 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* This is used to pack YAFFS2 tags, not YAFFS1tags. */ - -#ifndef __YAFFS_PACKEDTAGS2_H__ -#define __YAFFS_PACKEDTAGS2_H__ - -#include "yaffs_guts.h" -#include "yaffs_ecc.h" - -typedef struct { - unsigned sequenceNumber; - unsigned objectId; - unsigned chunkId; - unsigned byteCount; -} yaffs_PackedTags2TagsPart; - -typedef struct { - yaffs_PackedTags2TagsPart t; - yaffs_ECCOther ecc; -} yaffs_PackedTags2; - -void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t); -void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt); -#endif diff --git a/fs/yaffs2/yaffs_qsort.c b/fs/yaffs2/yaffs_qsort.c deleted file mode 100644 index 4d56f96..0000000 --- a/fs/yaffs2/yaffs_qsort.c +++ /dev/null @@ -1,163 +0,0 @@ -/* - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -#include "yportenv.h" -//#include <linux/string.h> - -/* - * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function". - */ -#define swapcode(TYPE, parmi, parmj, n) { \ - long i = (n) / sizeof (TYPE); \ - register TYPE *pi = (TYPE *) (parmi); \ - register TYPE *pj = (TYPE *) (parmj); \ - do { \ - register TYPE t = *pi; \ - *pi++ = *pj; \ - *pj++ = t; \ - } while (--i > 0); \ -} - -#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \ - es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1; - -static __inline void -swapfunc(char *a, char *b, int n, int swaptype) -{ - if (swaptype <= 1) - swapcode(long, a, b, n) - else - swapcode(char, a, b, n) -} - -#define swap(a, b) \ - if (swaptype == 0) { \ - long t = *(long *)(a); \ - *(long *)(a) = *(long *)(b); \ - *(long *)(b) = t; \ - } else \ - swapfunc(a, b, es, swaptype) - -#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) - -static __inline char * -med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *)) -{ - return cmp(a, b) < 0 ? - (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a )) - :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c )); -} - -#ifndef min -#define min(a,b) (((a) < (b)) ? (a) : (b)) -#endif - -void -yaffs_qsort(void *aa, size_t n, size_t es, - int (*cmp)(const void *, const void *)) -{ - char *pa, *pb, *pc, *pd, *pl, *pm, *pn; - int d, r, swaptype, swap_cnt; - register char *a = aa; - -loop: SWAPINIT(a, es); - swap_cnt = 0; - if (n < 7) { - for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es) - for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; - pl -= es) - swap(pl, pl - es); - return; - } - pm = (char *)a + (n / 2) * es; - if (n > 7) { - pl = (char *)a; - pn = (char *)a + (n - 1) * es; - if (n > 40) { - d = (n / 8) * es; - pl = med3(pl, pl + d, pl + 2 * d, cmp); - pm = med3(pm - d, pm, pm + d, cmp); - pn = med3(pn - 2 * d, pn - d, pn, cmp); - } - pm = med3(pl, pm, pn, cmp); - } - swap(a, pm); - pa = pb = (char *)a + es; - - pc = pd = (char *)a + (n - 1) * es; - for (;;) { - while (pb <= pc && (r = cmp(pb, a)) <= 0) { - if (r == 0) { - swap_cnt = 1; - swap(pa, pb); - pa += es; - } - pb += es; - } - while (pb <= pc && (r = cmp(pc, a)) >= 0) { - if (r == 0) { - swap_cnt = 1; - swap(pc, pd); - pd -= es; - } - pc -= es; - } - if (pb > pc) - break; - swap(pb, pc); - swap_cnt = 1; - pb += es; - pc -= es; - } - if (swap_cnt == 0) { /* Switch to insertion sort */ - for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es) - for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; - pl -= es) - swap(pl, pl - es); - return; - } - - pn = (char *)a + n * es; - r = min(pa - (char *)a, pb - pa); - vecswap(a, pb - r, r); - r = min((long)(pd - pc), (long)(pn - pd - es)); - vecswap(pb, pn - r, r); - if ((r = pb - pa) > es) - yaffs_qsort(a, r / es, es, cmp); - if ((r = pd - pc) > es) { - /* Iterate rather than recurse to save stack space */ - a = pn - r; - n = r / es; - goto loop; - } -/* yaffs_qsort(pn - r, r / es, es, cmp);*/ -} diff --git a/fs/yaffs2/yaffs_qsort.h b/fs/yaffs2/yaffs_qsort.h deleted file mode 100644 index 19083da..0000000 --- a/fs/yaffs2/yaffs_qsort.h +++ /dev/null @@ -1,23 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - - -#ifndef __YAFFS_QSORT_H__ -#define __YAFFS_QSORT_H__ - -extern void yaffs_qsort (void *const base, size_t total_elems, size_t size, - int (*cmp)(const void *, const void *)); - -#endif diff --git a/fs/yaffs2/yaffs_ramdisk.h b/fs/yaffs2/yaffs_ramdisk.h deleted file mode 100644 index 3cff8be..0000000 --- a/fs/yaffs2/yaffs_ramdisk.h +++ /dev/null @@ -1,32 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * yaffs_ramdisk.h: yaffs ram disk component - */ - -#ifndef __YAFFS_RAMDISK_H__ -#define __YAFFS_RAMDISK_H__ - - -#include "yaffs_guts.h" -int yramdisk_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); -int yramdisk_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_ExtendedTags *tags); -int yramdisk_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags); -int yramdisk_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); -int yramdisk_InitialiseNAND(yaffs_Device *dev); -int yramdisk_MarkNANDBlockBad(yaffs_Device *dev,int blockNumber); -int yramdisk_QueryNANDBlock(yaffs_Device *dev, int blockNo, yaffs_BlockState *state, int *sequenceNumber); -#endif diff --git a/fs/yaffs2/yaffs_tagscompat.c b/fs/yaffs2/yaffs_tagscompat.c deleted file mode 100644 index e872323..0000000 --- a/fs/yaffs2/yaffs_tagscompat.c +++ /dev/null @@ -1,532 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -#include "yaffs_guts.h" -#include "yaffs_tagscompat.h" -#include "yaffs_ecc.h" - -static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND); -#ifdef NOTYET -static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND); -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_Spare * spare); -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_Spare * spare); -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND); -#endif - -static const char yaffs_countBitsTable[256] = { - 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 -}; - -int yaffs_CountBits(__u8 x) -{ - int retVal; - retVal = yaffs_countBitsTable[x]; - return retVal; -} - -/********** Tags ECC calculations *********/ - -void yaffs_CalcECC(const __u8 * data, yaffs_Spare * spare) -{ - yaffs_ECCCalculate(data, spare->ecc1); - yaffs_ECCCalculate(&data[256], spare->ecc2); -} - -void yaffs_CalcTagsECC(yaffs_Tags * tags) -{ - /* Calculate an ecc */ - - unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; - unsigned i, j; - unsigned ecc = 0; - unsigned bit = 0; - - tags->ecc = 0; - - for (i = 0; i < 8; i++) { - for (j = 1; j & 0xff; j <<= 1) { - bit++; - if (b[i] & j) { - ecc ^= bit; - } - } - } - - tags->ecc = ecc; - -} - -int yaffs_CheckECCOnTags(yaffs_Tags * tags) -{ - unsigned ecc = tags->ecc; - - yaffs_CalcTagsECC(tags); - - ecc ^= tags->ecc; - - if (ecc && ecc <= 64) { - /* TODO: Handle the failure better. Retire? */ - unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; - - ecc--; - - b[ecc / 8] ^= (1 << (ecc & 7)); - - /* Now recvalc the ecc */ - yaffs_CalcTagsECC(tags); - - return 1; /* recovered error */ - } else if (ecc) { - /* Wierd ecc failure value */ - /* TODO Need to do somethiong here */ - return -1; /* unrecovered error */ - } - - return 0; -} - -/********** Tags **********/ - -static void yaffs_LoadTagsIntoSpare(yaffs_Spare * sparePtr, - yaffs_Tags * tagsPtr) -{ - yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; - - yaffs_CalcTagsECC(tagsPtr); - - sparePtr->tagByte0 = tu->asBytes[0]; - sparePtr->tagByte1 = tu->asBytes[1]; - sparePtr->tagByte2 = tu->asBytes[2]; - sparePtr->tagByte3 = tu->asBytes[3]; - sparePtr->tagByte4 = tu->asBytes[4]; - sparePtr->tagByte5 = tu->asBytes[5]; - sparePtr->tagByte6 = tu->asBytes[6]; - sparePtr->tagByte7 = tu->asBytes[7]; -} - -static void yaffs_GetTagsFromSpare(yaffs_Device * dev, yaffs_Spare * sparePtr, - yaffs_TagsUnion *tu) -{ - int result; - - tu->asBytes[0] = sparePtr->tagByte0; - tu->asBytes[1] = sparePtr->tagByte1; - tu->asBytes[2] = sparePtr->tagByte2; - tu->asBytes[3] = sparePtr->tagByte3; - tu->asBytes[4] = sparePtr->tagByte4; - tu->asBytes[5] = sparePtr->tagByte5; - tu->asBytes[6] = sparePtr->tagByte6; - tu->asBytes[7] = sparePtr->tagByte7; - - result = yaffs_CheckECCOnTags(&tu->asTags); - if (result > 0) { - dev->tagsEccFixed++; - } else if (result < 0) { - dev->tagsEccUnfixed++; - } -} - -static void yaffs_SpareInitialise(yaffs_Spare * spare) -{ - memset(spare, 0xFF, sizeof(yaffs_Spare)); -} - -static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, const __u8 * data, - yaffs_Spare * spare) -{ - if (chunkInNAND < dev->startBlock * dev->nChunksPerBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs chunk %d is not valid" TENDSTR), - chunkInNAND)); - return YAFFS_FAIL; - } - - dev->nPageWrites++; - return dev->writeChunkToNAND(dev, chunkInNAND, data, spare); -} - -static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, - __u8 * data, - yaffs_Spare * spare, - yaffs_ECCResult * eccResult, - int doErrorCorrection) -{ - int retVal; - yaffs_Spare localSpare; - - dev->nPageReads++; - - if (!spare && data) { - /* If we don't have a real spare, then we use a local one. */ - /* Need this for the calculation of the ecc */ - spare = &localSpare; - } - - if (!dev->useNANDECC) { - retVal = dev->readChunkFromNAND(dev, chunkInNAND, data, spare); - if (data && doErrorCorrection) { - /* Do ECC correction */ - /* Todo handle any errors */ - int eccResult1, eccResult2; - __u8 calcEcc[3]; - - yaffs_ECCCalculate(data, calcEcc); - eccResult1 = - yaffs_ECCCorrect(data, spare->ecc1, calcEcc); - yaffs_ECCCalculate(&data[256], calcEcc); - eccResult2 = - yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc); - - if (eccResult1 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error fix performed on chunk %d:0" - TENDSTR), chunkInNAND)); - dev->eccFixed++; - } else if (eccResult1 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error unfixed on chunk %d:0" - TENDSTR), chunkInNAND)); - dev->eccUnfixed++; - } - - if (eccResult2 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error fix performed on chunk %d:1" - TENDSTR), chunkInNAND)); - dev->eccFixed++; - } else if (eccResult2 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error unfixed on chunk %d:1" - TENDSTR), chunkInNAND)); - dev->eccUnfixed++; - } - - if (eccResult1 || eccResult2) { - /* We had a data problem on this page */ - yaffs_HandleReadDataError(dev, chunkInNAND); - } - - if (eccResult1 < 0 || eccResult2 < 0) - *eccResult = YAFFS_ECC_RESULT_UNFIXED; - else if (eccResult1 > 0 || eccResult2 > 0) - *eccResult = YAFFS_ECC_RESULT_FIXED; - else - *eccResult = YAFFS_ECC_RESULT_NO_ERROR; - } - } else { - /* Must allocate enough memory for spare+2*sizeof(int) */ - /* for ecc results from device. */ - struct yaffs_NANDSpare nspare; - retVal = - dev->readChunkFromNAND(dev, chunkInNAND, data, - (yaffs_Spare *) & nspare); - memcpy(spare, &nspare, sizeof(yaffs_Spare)); - if (data && doErrorCorrection) { - if (nspare.eccres1 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error fix performed on chunk %d:0" - TENDSTR), chunkInNAND)); - } else if (nspare.eccres1 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error unfixed on chunk %d:0" - TENDSTR), chunkInNAND)); - } - - if (nspare.eccres2 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error fix performed on chunk %d:1" - TENDSTR), chunkInNAND)); - } else if (nspare.eccres2 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error unfixed on chunk %d:1" - TENDSTR), chunkInNAND)); - } - - if (nspare.eccres1 || nspare.eccres2) { - /* We had a data problem on this page */ - yaffs_HandleReadDataError(dev, chunkInNAND); - } - - if (nspare.eccres1 < 0 || nspare.eccres2 < 0) - *eccResult = YAFFS_ECC_RESULT_UNFIXED; - else if (nspare.eccres1 > 0 || nspare.eccres2 > 0) - *eccResult = YAFFS_ECC_RESULT_FIXED; - else - *eccResult = YAFFS_ECC_RESULT_NO_ERROR; - - } - } - return retVal; -} - -#ifdef NOTYET -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND) -{ - - static int init = 0; - static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK]; - static __u8 data[YAFFS_BYTES_PER_CHUNK]; - /* Might as well always allocate the larger size for */ - /* dev->useNANDECC == true; */ - static __u8 spare[sizeof(struct yaffs_NANDSpare)]; - - dev->readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare); - - if (!init) { - memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK); - init = 1; - } - - if (memcmp(cmpbuf, data, YAFFS_BYTES_PER_CHUNK)) - return YAFFS_FAIL; - if (memcmp(cmpbuf, spare, 16)) - return YAFFS_FAIL; - - return YAFFS_OK; - -} -#endif - -/* - * Functions for robustisizing - */ - -static void yaffs_HandleReadDataError(yaffs_Device * dev, int chunkInNAND) -{ - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; - - /* Mark the block for retirement */ - yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND)); - - /* TODO: - * Just do a garbage collection on the affected block - * then retire the block - * NB recursion - */ -} - -#ifdef NOTYET -static void yaffs_CheckWrittenBlock(yaffs_Device * dev, int chunkInNAND) -{ -} - -static void yaffs_HandleWriteChunkOk(yaffs_Device * dev, int chunkInNAND, - const __u8 * data, - const yaffs_Spare * spare) -{ -} - -static void yaffs_HandleUpdateChunk(yaffs_Device * dev, int chunkInNAND, - const yaffs_Spare * spare) -{ -} - -static void yaffs_HandleWriteChunkError(yaffs_Device * dev, int chunkInNAND) -{ - int blockInNAND = chunkInNAND / dev->nChunksPerBlock; - - /* Mark the block for retirement */ - yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; - /* Delete the chunk */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); -} - -static int yaffs_VerifyCompare(const __u8 * d0, const __u8 * d1, - const yaffs_Spare * s0, const yaffs_Spare * s1) -{ - - if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 || - s0->tagByte0 != s1->tagByte0 || - s0->tagByte1 != s1->tagByte1 || - s0->tagByte2 != s1->tagByte2 || - s0->tagByte3 != s1->tagByte3 || - s0->tagByte4 != s1->tagByte4 || - s0->tagByte5 != s1->tagByte5 || - s0->tagByte6 != s1->tagByte6 || - s0->tagByte7 != s1->tagByte7 || - s0->ecc1[0] != s1->ecc1[0] || - s0->ecc1[1] != s1->ecc1[1] || - s0->ecc1[2] != s1->ecc1[2] || - s0->ecc2[0] != s1->ecc2[0] || - s0->ecc2[1] != s1->ecc2[1] || s0->ecc2[2] != s1->ecc2[2]) { - return 0; - } - - return 1; -} -#endif /* NOTYET */ - -int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * - eTags) -{ - yaffs_Spare spare; - yaffs_Tags tags; - - yaffs_SpareInitialise(&spare); - - if (eTags->chunkDeleted) { - spare.pageStatus = 0; - } else { - tags.objectId = eTags->objectId; - tags.chunkId = eTags->chunkId; - tags.byteCount = eTags->byteCount; - tags.serialNumber = eTags->serialNumber; - - if (!dev->useNANDECC && data) { - yaffs_CalcECC(data, &spare); - } - yaffs_LoadTagsIntoSpare(&spare, &tags); - - } - - return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare); -} - -int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev, - int chunkInNAND, - __u8 * data, - yaffs_ExtendedTags * eTags) -{ - - yaffs_Spare spare; - yaffs_TagsUnion tags; - yaffs_ECCResult eccResult; - - static yaffs_Spare spareFF; - static int init; - - if (!init) { - memset(&spareFF, 0xFF, sizeof(spareFF)); - init = 1; - } - - if (yaffs_ReadChunkFromNAND - (dev, chunkInNAND, data, &spare, &eccResult, 1)) { - /* eTags may be NULL */ - if (eTags) { - - int deleted = - (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0; - - eTags->chunkDeleted = deleted; - eTags->eccResult = eccResult; - eTags->blockBad = 0; /* We're reading it */ - /* therefore it is not a bad block */ - eTags->chunkUsed = - (memcmp(&spareFF, &spare, sizeof(spareFF)) != - 0) ? 1 : 0; - - if (eTags->chunkUsed) { - yaffs_GetTagsFromSpare(dev, &spare, &tags); - - eTags->objectId = tags.asTags.objectId; - eTags->chunkId = tags.asTags.chunkId; - eTags->byteCount = tags.asTags.byteCount; - eTags->serialNumber = tags.asTags.serialNumber; - } - } - - return YAFFS_OK; - } else { - return YAFFS_FAIL; - } -} - -int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, - int blockInNAND) -{ - - yaffs_Spare spare; - - memset(&spare, 0xff, sizeof(yaffs_Spare)); - - spare.blockStatus = 'Y'; - - yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock, NULL, - &spare); - yaffs_WriteChunkToNAND(dev, blockInNAND * dev->nChunksPerBlock + 1, - NULL, &spare); - - return YAFFS_OK; - -} - -int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, - int blockNo, yaffs_BlockState * - state, - int *sequenceNumber) -{ - - yaffs_Spare spare0, spare1; - static yaffs_Spare spareFF; - static int init; - yaffs_ECCResult dummy; - - if (!init) { - memset(&spareFF, 0xFF, sizeof(spareFF)); - init = 1; - } - - *sequenceNumber = 0; - - yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL, - &spare0, &dummy, 1); - yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL, - &spare1, &dummy, 1); - - if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7) - *state = YAFFS_BLOCK_STATE_DEAD; - else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0) - *state = YAFFS_BLOCK_STATE_EMPTY; - else - *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; - - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_tagscompat.h b/fs/yaffs2/yaffs_tagscompat.h deleted file mode 100644 index a61e3ba..0000000 --- a/fs/yaffs2/yaffs_tagscompat.h +++ /dev/null @@ -1,40 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_TAGSCOMPAT_H__ -#define __YAFFS_TAGSCOMPAT_H__ - -#include "yaffs_guts.h" -int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device * dev, - int chunkInNAND, - const __u8 * data, - const yaffs_ExtendedTags * - tags); -int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev, - int chunkInNAND, - __u8 * data, - yaffs_ExtendedTags * - tags); -int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, - int blockNo); -int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, - int blockNo, yaffs_BlockState * - state, int *sequenceNumber); - -void yaffs_CalcTagsECC(yaffs_Tags * tags); -int yaffs_CheckECCOnTags(yaffs_Tags * tags); -int yaffs_CountBits(__u8 byte); - -#endif diff --git a/fs/yaffs2/yaffs_tagsvalidity.c b/fs/yaffs2/yaffs_tagsvalidity.c deleted file mode 100644 index f588d3a..0000000 --- a/fs/yaffs2/yaffs_tagsvalidity.c +++ /dev/null @@ -1,31 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -#include "yaffs_tagsvalidity.h" - -void yaffs_InitialiseTags(yaffs_ExtendedTags * tags) -{ - memset(tags, 0, sizeof(yaffs_ExtendedTags)); - tags->validMarker0 = 0xAAAAAAAA; - tags->validMarker1 = 0x55555555; -} - -int yaffs_ValidateTags(yaffs_ExtendedTags * tags) -{ - return (tags->validMarker0 == 0xAAAAAAAA && - tags->validMarker1 == 0x55555555); - -} diff --git a/fs/yaffs2/yaffs_tagsvalidity.h b/fs/yaffs2/yaffs_tagsvalidity.h deleted file mode 100644 index 2fd0c24..0000000 --- a/fs/yaffs2/yaffs_tagsvalidity.h +++ /dev/null @@ -1,24 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - - -#ifndef __YAFFS_TAGS_VALIDITY_H__ -#define __YAFFS_TAGS_VALIDITY_H__ - -#include "yaffs_guts.h" - -void yaffs_InitialiseTags(yaffs_ExtendedTags * tags); -int yaffs_ValidateTags(yaffs_ExtendedTags * tags); -#endif diff --git a/fs/yaffs2/yaffscfg.c b/fs/yaffs2/yaffscfg.c deleted file mode 100644 index 01399ea..0000000 --- a/fs/yaffs2/yaffscfg.c +++ /dev/null @@ -1,420 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * yaffscfg.c The configuration for the "direct" use of yaffs. - * - * This file is intended to be modified to your requirements. - * There is no need to redistribute this file. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> - -#include <config.h> -#include "nand.h" -#include "yaffscfg.h" -#include "yaffsfs.h" -#include "yaffs_packedtags2.h" -#include "yaffs_mtdif.h" -#include "yaffs_mtdif2.h" -#if 0 -#include <errno.h> -#else -#include "malloc.h" -#endif - -unsigned yaffs_traceMask = 0x0; /* Disable logging */ -static int yaffs_errno = 0; - -void yaffsfs_SetError(int err) -{ - //Do whatever to set error - yaffs_errno = err; -} - -int yaffsfs_GetError(void) -{ - return yaffs_errno; -} - -void yaffsfs_Lock(void) -{ -} - -void yaffsfs_Unlock(void) -{ -} - -__u32 yaffsfs_CurrentTime(void) -{ - return 0; -} - -void *yaffs_malloc(size_t size) -{ - return malloc(size); -} - -void yaffs_free(void *ptr) -{ - free(ptr); -} - -void yaffsfs_LocalInitialisation(void) -{ - // Define locking semaphore. -} - -// Configuration for: -// /ram 2MB ramdisk -// /boot 2MB boot disk (flash) -// /flash 14MB flash disk (flash) -// NB Though /boot and /flash occupy the same physical device they -// are still disticnt "yaffs_Devices. You may think of these as "partitions" -// using non-overlapping areas in the same device. -// - -#include "yaffs_ramdisk.h" -#include "yaffs_flashif.h" - -static int isMounted = 0; -#define MOUNT_POINT "/flash" -extern nand_info_t nand_info[]; - -/* XXX U-BOOT XXX */ -#if 0 -static yaffs_Device ramDev; -static yaffs_Device bootDev; -static yaffs_Device flashDev; -#endif - -static yaffsfs_DeviceConfiguration yaffsfs_config[] = { -/* XXX U-BOOT XXX */ -#if 0 - { "/ram", &ramDev}, - { "/boot", &bootDev}, - { "/flash", &flashDev}, -#else - { MOUNT_POINT, 0}, -#endif - {(void *)0,(void *)0} -}; - - -int yaffs_StartUp(void) -{ - struct mtd_info *mtd = &nand_info[0]; - int yaffsVersion = 2; - int nBlocks; - - yaffs_Device *flashDev = calloc(1, sizeof(yaffs_Device)); - yaffsfs_config[0].dev = flashDev; - - /* store the mtd device for later use */ - flashDev->genericDevice = mtd; - - // Stuff to configure YAFFS - // Stuff to initialise anything special (eg lock semaphore). - yaffsfs_LocalInitialisation(); - - // Set up devices - -/* XXX U-BOOT XXX */ -#if 0 - // /ram - ramDev.nBytesPerChunk = 512; - ramDev.nChunksPerBlock = 32; - ramDev.nReservedBlocks = 2; // Set this smaller for RAM - ramDev.startBlock = 1; // Can't use block 0 - ramDev.endBlock = 127; // Last block in 2MB. - ramDev.useNANDECC = 1; - ramDev.nShortOpCaches = 0; // Disable caching on this device. - ramDev.genericDevice = (void *) 0; // Used to identify the device in fstat. - ramDev.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND; - ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND; - ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND; - ramDev.initialiseNAND = yramdisk_InitialiseNAND; - - // /boot - bootDev.nBytesPerChunk = 612; - bootDev.nChunksPerBlock = 32; - bootDev.nReservedBlocks = 5; - bootDev.startBlock = 1; // Can't use block 0 - bootDev.endBlock = 127; // Last block in 2MB. - bootDev.useNANDECC = 0; // use YAFFS's ECC - bootDev.nShortOpCaches = 10; // Use caches - bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat. - bootDev.writeChunkToNAND = yflash_WriteChunkToNAND; - bootDev.readChunkFromNAND = yflash_ReadChunkFromNAND; - bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND; - bootDev.initialiseNAND = yflash_InitialiseNAND; -#endif - - // /flash - flashDev->nReservedBlocks = 5; -// flashDev->nShortOpCaches = (options.no_cache) ? 0 : 10; - flashDev->nShortOpCaches = 10; // Use caches - flashDev->useNANDECC = 0; // do not use YAFFS's ECC - - if (yaffsVersion == 2) - { - flashDev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND; - flashDev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND; - flashDev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad; - flashDev->queryNANDBlock = nandmtd2_QueryNANDBlock; - flashDev->spareBuffer = YMALLOC(mtd->oobsize); - flashDev->isYaffs2 = 1; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) - flashDev->nDataBytesPerChunk = mtd->writesize; - flashDev->nChunksPerBlock = mtd->erasesize / mtd->writesize; -#else - flashDev->nDataBytesPerChunk = mtd->oobblock; - flashDev->nChunksPerBlock = mtd->erasesize / mtd->oobblock; -#endif - nBlocks = mtd->size / mtd->erasesize; - - flashDev->nCheckpointReservedBlocks = 10; - flashDev->startBlock = 0; - flashDev->endBlock = nBlocks - 1; - } - else - { - flashDev->writeChunkToNAND = nandmtd_WriteChunkToNAND; - flashDev->readChunkFromNAND = nandmtd_ReadChunkFromNAND; - flashDev->isYaffs2 = 0; - nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK); - flashDev->startBlock = 320; - flashDev->endBlock = nBlocks - 1; - flashDev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK; - flashDev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK; - } - - /* ... and common functions */ - flashDev->eraseBlockInNAND = nandmtd_EraseBlockInNAND; - flashDev->initialiseNAND = nandmtd_InitialiseNAND; - - yaffs_initialise(yaffsfs_config); - - return 0; -} - - -void make_a_file(char *yaffsName,char bval,int sizeOfFile) -{ - int outh; - int i; - unsigned char buffer[100]; - - outh = yaffs_open(yaffsName, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE); - if (outh < 0) - { - printf("Error opening file: %d\n", outh); - return; - } - - memset(buffer,bval,100); - - do{ - i = sizeOfFile; - if(i > 100) i = 100; - sizeOfFile -= i; - - yaffs_write(outh,buffer,i); - - } while (sizeOfFile > 0); - - - yaffs_close(outh); -} - -void read_a_file(char *fn) -{ - int h; - int i = 0; - unsigned char b; - - h = yaffs_open(fn, O_RDWR,0); - if(h<0) - { - printf("File not found\n"); - return; - } - - while(yaffs_read(h,&b,1)> 0) - { - printf("%02x ",b); - i++; - if(i > 32) - { - printf("\n"); - i = 0;; - } - } - printf("\n"); - yaffs_close(h); -} - -void cmd_yaffs_mount(char *mp) -{ - yaffs_StartUp(); - int retval = yaffs_mount(mp); - if( retval != -1) - isMounted = 1; - else - printf("Error mounting %s, return value: %d\n", mp, yaffsfs_GetError()); -} - -static void checkMount(void) -{ - if( !isMounted ) - { - cmd_yaffs_mount(MOUNT_POINT); - } -} - -void cmd_yaffs_umount(char *mp) -{ - checkMount(); - if( yaffs_unmount(mp) == -1) - printf("Error umounting %s, return value: %d\n", mp, yaffsfs_GetError()); -} - -void cmd_yaffs_write_file(char *yaffsName,char bval,int sizeOfFile) -{ - checkMount(); - make_a_file(yaffsName,bval,sizeOfFile); -} - - -void cmd_yaffs_read_file(char *fn) -{ - checkMount(); - read_a_file(fn); -} - - -void cmd_yaffs_mread_file(char *fn, char *addr) -{ - int h; - struct yaffs_stat s; - - checkMount(); - - yaffs_stat(fn,&s); - - printf ("Copy %s to 0x%p... ", fn, addr); - h = yaffs_open(fn, O_RDWR,0); - if(h<0) - { - printf("File not found\n"); - return; - } - - yaffs_read(h,addr,(int)s.st_size); - printf("\t[DONE]\n"); - - yaffs_close(h); -} - - -void cmd_yaffs_mwrite_file(char *fn, char *addr, int size) -{ - int outh; - - checkMount(); - outh = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE); - if (outh < 0) - { - printf("Error opening file: %d\n", outh); - } - - yaffs_write(outh,addr,size); - - yaffs_close(outh); -} - - -void cmd_yaffs_ls(const char *mountpt, int longlist) -{ - int i; - yaffs_DIR *d; - yaffs_dirent *de; - struct yaffs_stat stat; - char tempstr[255]; - - checkMount(); - d = yaffs_opendir(mountpt); - - if(!d) - { - printf("opendir failed\n"); - } - else - { - for(i = 0; (de = yaffs_readdir(d)) != NULL; i++) - { - if (longlist) - { - sprintf(tempstr, "%s/%s", mountpt, de->d_name); - yaffs_stat(tempstr, &stat); - printf("%-25s\t%7ld\n",de->d_name, stat.st_size); - } - else - { - printf("%s\n",de->d_name); - } - } - } -} - - -void cmd_yaffs_mkdir(const char *dir) -{ - checkMount(); - - int retval = yaffs_mkdir(dir, 0); - - if ( retval < 0) - printf("yaffs_mkdir returning error: %d\n", retval); -} - -void cmd_yaffs_rmdir(const char *dir) -{ - checkMount(); - - int retval = yaffs_rmdir(dir); - - if ( retval < 0) - printf("yaffs_rmdir returning error: %d\n", retval); -} - -void cmd_yaffs_rm(const char *path) -{ - checkMount(); - - int retval = yaffs_unlink(path); - - if ( retval < 0) - printf("yaffs_unlink returning error: %d\n", retval); -} - -void cmd_yaffs_mv(const char *oldPath, const char *newPath) -{ - checkMount(); - - int retval = yaffs_rename(newPath, oldPath); - - if ( retval < 0) - printf("yaffs_unlink returning error: %d\n", retval); -} diff --git a/fs/yaffs2/yaffscfg.h b/fs/yaffs2/yaffscfg.h deleted file mode 100644 index 3503dc8..0000000 --- a/fs/yaffs2/yaffscfg.h +++ /dev/null @@ -1,45 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * Header file for using yaffs in an application via - * a direct interface. - */ - - -#ifndef __YAFFSCFG_H__ -#define __YAFFSCFG_H__ - - -#include "devextras.h" - -#define YAFFSFS_N_HANDLES 200 - - -typedef struct { - const char *prefix; - struct yaffs_DeviceStruct *dev; -} yaffsfs_DeviceConfiguration; - - -void yaffsfs_Lock(void); -void yaffsfs_Unlock(void); - -__u32 yaffsfs_CurrentTime(void); - -void yaffsfs_SetError(int err); -int yaffsfs_GetError(void); - -#endif diff --git a/fs/yaffs2/yaffsfs.c b/fs/yaffs2/yaffsfs.c deleted file mode 100644 index 111cb34..0000000 --- a/fs/yaffs2/yaffsfs.c +++ /dev/null @@ -1,1510 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* XXX U-BOOT XXX */ -#include <common.h> -#include <malloc.h> - -#include "yaffsfs.h" -#include "yaffs_guts.h" -#include "yaffscfg.h" -#include "yportenv.h" - -/* XXX U-BOOT XXX */ -#if 0 -#include <string.h> // for memset -#endif - -#define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5 - -#ifndef NULL -#define NULL ((void *)0) -#endif - - -const char *yaffsfs_c_version="$Id: yaffsfs.c,v 1.18 2007/07/18 19:40:38 charles Exp $"; - -// configurationList is the list of devices that are supported -static yaffsfs_DeviceConfiguration *yaffsfs_configurationList; - - -/* Some forward references */ -static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path, int symDepth); -static void yaffsfs_RemoveObjectCallback(yaffs_Object *obj); - - -// Handle management. -// - - -unsigned int yaffs_wr_attempts; - -typedef struct -{ - __u8 inUse:1; // this handle is in use - __u8 readOnly:1; // this handle is read only - __u8 append:1; // append only - __u8 exclusive:1; // exclusive - __u32 position; // current position in file - yaffs_Object *obj; // the object -}yaffsfs_Handle; - - -static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES]; - -// yaffsfs_InitHandle -/// Inilitalise handles on start-up. -// -static int yaffsfs_InitHandles(void) -{ - int i; - for(i = 0; i < YAFFSFS_N_HANDLES; i++) - { - yaffsfs_handle[i].inUse = 0; - yaffsfs_handle[i].obj = NULL; - } - return 0; -} - -yaffsfs_Handle *yaffsfs_GetHandlePointer(int h) -{ - if(h < 0 || h >= YAFFSFS_N_HANDLES) - { - return NULL; - } - - return &yaffsfs_handle[h]; -} - -yaffs_Object *yaffsfs_GetHandleObject(int handle) -{ - yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); - - if(h && h->inUse) - { - return h->obj; - } - - return NULL; -} - - -//yaffsfs_GetHandle -// Grab a handle (when opening a file) -// - -static int yaffsfs_GetHandle(void) -{ - int i; - yaffsfs_Handle *h; - - for(i = 0; i < YAFFSFS_N_HANDLES; i++) - { - h = yaffsfs_GetHandlePointer(i); - if(!h) - { - // todo bug: should never happen - } - if(!h->inUse) - { - memset(h,0,sizeof(yaffsfs_Handle)); - h->inUse=1; - return i; - } - } - return -1; -} - -// yaffs_PutHandle -// Let go of a handle (when closing a file) -// -static int yaffsfs_PutHandle(int handle) -{ - yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); - - if(h) - { - h->inUse = 0; - h->obj = NULL; - } - return 0; -} - - - -// Stuff to search for a directory from a path - - -int yaffsfs_Match(char a, char b) -{ - // case sensitive - return (a == b); -} - -// yaffsfs_FindDevice -// yaffsfs_FindRoot -// Scan the configuration list to find the root. -// Curveballs: Should match paths that end in '/' too -// Curveball2 Might have "/x/ and "/x/y". Need to return the longest match -static yaffs_Device *yaffsfs_FindDevice(const char *path, char **restOfPath) -{ - yaffsfs_DeviceConfiguration *cfg = yaffsfs_configurationList; - const char *leftOver; - const char *p; - yaffs_Device *retval = NULL; - int thisMatchLength; - int longestMatch = -1; - - // Check all configs, choose the one that: - // 1) Actually matches a prefix (ie /a amd /abc will not match - // 2) Matches the longest. - while(cfg && cfg->prefix && cfg->dev) - { - leftOver = path; - p = cfg->prefix; - thisMatchLength = 0; - - while(*p && //unmatched part of prefix - strcmp(p,"/") && // the rest of the prefix is not / (to catch / at end) - *leftOver && - yaffsfs_Match(*p,*leftOver)) - { - p++; - leftOver++; - thisMatchLength++; - } - if((!*p || strcmp(p,"/") == 0) && // end of prefix - (!*leftOver || *leftOver == '/') && // no more in this path name part - (thisMatchLength > longestMatch)) - { - // Matched prefix - *restOfPath = (char *)leftOver; - retval = cfg->dev; - longestMatch = thisMatchLength; - } - cfg++; - } - return retval; -} - -static yaffs_Object *yaffsfs_FindRoot(const char *path, char **restOfPath) -{ - - yaffs_Device *dev; - - dev= yaffsfs_FindDevice(path,restOfPath); - if(dev && dev->isMounted) - { - return dev->rootDir; - } - return NULL; -} - -static yaffs_Object *yaffsfs_FollowLink(yaffs_Object *obj,int symDepth) -{ - - while(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - char *alias = obj->variant.symLinkVariant.alias; - - if(*alias == '/') - { - // Starts with a /, need to scan from root up - obj = yaffsfs_FindObject(NULL,alias,symDepth++); - } - else - { - // Relative to here, so use the parent of the symlink as a start - obj = yaffsfs_FindObject(obj->parent,alias,symDepth++); - } - } - return obj; -} - - -// yaffsfs_FindDirectory -// Parse a path to determine the directory and the name within the directory. -// -// eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx" -static yaffs_Object *yaffsfs_DoFindDirectory(yaffs_Object *startDir,const char *path,char **name,int symDepth) -{ - yaffs_Object *dir; - char *restOfPath; - char str[YAFFS_MAX_NAME_LENGTH+1]; - int i; - - if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) - { - return NULL; - } - - if(startDir) - { - dir = startDir; - restOfPath = (char *)path; - } - else - { - dir = yaffsfs_FindRoot(path,&restOfPath); - } - - while(dir) - { - // parse off /. - // curve ball: also throw away surplus '/' - // eg. "/ram/x////ff" gets treated the same as "/ram/x/ff" - while(*restOfPath == '/') - { - restOfPath++; // get rid of '/' - } - - *name = restOfPath; - i = 0; - - while(*restOfPath && *restOfPath != '/') - { - if (i < YAFFS_MAX_NAME_LENGTH) - { - str[i] = *restOfPath; - str[i+1] = '\0'; - i++; - } - restOfPath++; - } - - if(!*restOfPath) - { - // got to the end of the string - return dir; - } - else - { - if(strcmp(str,".") == 0) - { - // Do nothing - } - else if(strcmp(str,"..") == 0) - { - dir = dir->parent; - } - else - { - dir = yaffs_FindObjectByName(dir,str); - - while(dir && dir->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - - dir = yaffsfs_FollowLink(dir,symDepth); - - } - - if(dir && dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - { - dir = NULL; - } - } - } - } - // directory did not exist. - return NULL; -} - -static yaffs_Object *yaffsfs_FindDirectory(yaffs_Object *relativeDirectory,const char *path,char **name,int symDepth) -{ - return yaffsfs_DoFindDirectory(relativeDirectory,path,name,symDepth); -} - -// yaffsfs_FindObject turns a path for an existing object into the object -// -static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path,int symDepth) -{ - yaffs_Object *dir; - char *name; - - dir = yaffsfs_FindDirectory(relativeDirectory,path,&name,symDepth); - - if(dir && *name) - { - return yaffs_FindObjectByName(dir,name); - } - - return dir; -} - - - -int yaffs_open(const char *path, int oflag, int mode) -{ - yaffs_Object *obj = NULL; - yaffs_Object *dir = NULL; - char *name; - int handle = -1; - yaffsfs_Handle *h = NULL; - int alreadyOpen = 0; - int alreadyExclusive = 0; - int openDenied = 0; - int symDepth = 0; - int errorReported = 0; - - int i; - - - // todo sanity check oflag (eg. can't have O_TRUNC without WRONLY or RDWR - - - yaffsfs_Lock(); - - handle = yaffsfs_GetHandle(); - - if(handle >= 0) - { - - h = yaffsfs_GetHandlePointer(handle); - - - // try to find the exisiting object - obj = yaffsfs_FindObject(NULL,path,0); - - if(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - - obj = yaffsfs_FollowLink(obj,symDepth++); - } - - if(obj) - { - // Check if the object is already in use - alreadyOpen = alreadyExclusive = 0; - - for(i = 0; i <= YAFFSFS_N_HANDLES; i++) - { - - if(i != handle && - yaffsfs_handle[i].inUse && - obj == yaffsfs_handle[i].obj) - { - alreadyOpen = 1; - if(yaffsfs_handle[i].exclusive) - { - alreadyExclusive = 1; - } - } - } - - if(((oflag & O_EXCL) && alreadyOpen) || alreadyExclusive) - { - openDenied = 1; - } - - // Open should fail if O_CREAT and O_EXCL are specified - if((oflag & O_EXCL) && (oflag & O_CREAT)) - { - openDenied = 1; - yaffsfs_SetError(-EEXIST); - errorReported = 1; - } - - // Check file permissions - if( (oflag & (O_RDWR | O_WRONLY)) == 0 && // ie O_RDONLY - !(obj->yst_mode & S_IREAD)) - { - openDenied = 1; - } - - if( (oflag & O_RDWR) && - !(obj->yst_mode & S_IREAD)) - { - openDenied = 1; - } - - if( (oflag & (O_RDWR | O_WRONLY)) && - !(obj->yst_mode & S_IWRITE)) - { - openDenied = 1; - } - - } - - else if((oflag & O_CREAT)) - { - // Let's see if we can create this file - dir = yaffsfs_FindDirectory(NULL,path,&name,0); - if(dir) - { - obj = yaffs_MknodFile(dir,name,mode,0,0); - } - else - { - yaffsfs_SetError(-ENOTDIR); - } - } - - if(obj && !openDenied) - { - h->obj = obj; - h->inUse = 1; - h->readOnly = (oflag & (O_WRONLY | O_RDWR)) ? 0 : 1; - h->append = (oflag & O_APPEND) ? 1 : 0; - h->exclusive = (oflag & O_EXCL) ? 1 : 0; - h->position = 0; - - obj->inUse++; - if((oflag & O_TRUNC) && !h->readOnly) - { - //todo truncate - yaffs_ResizeFile(obj,0); - } - - } - else - { - yaffsfs_PutHandle(handle); - if(!errorReported) - { - yaffsfs_SetError(-EACCESS); - errorReported = 1; - } - handle = -1; - } - - } - - yaffsfs_Unlock(); - - return handle; -} - -int yaffs_close(int fd) -{ - yaffsfs_Handle *h = NULL; - int retVal = 0; - - yaffsfs_Lock(); - - h = yaffsfs_GetHandlePointer(fd); - - if(h && h->inUse) - { - // clean up - yaffs_FlushFile(h->obj,1); - h->obj->inUse--; - if(h->obj->inUse <= 0 && h->obj->unlinked) - { - yaffs_DeleteFile(h->obj); - } - yaffsfs_PutHandle(fd); - retVal = 0; - } - else - { - // bad handle - yaffsfs_SetError(-EBADF); - retVal = -1; - } - - yaffsfs_Unlock(); - - return retVal; -} - -int yaffs_read(int fd, void *buf, unsigned int nbyte) -{ - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int pos = 0; - int nRead = -1; - int maxRead; - - yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); - - if(!h || !obj) - { - // bad handle - yaffsfs_SetError(-EBADF); - } - else if( h && obj) - { - pos= h->position; - if(yaffs_GetObjectFileLength(obj) > pos) - { - maxRead = yaffs_GetObjectFileLength(obj) - pos; - } - else - { - maxRead = 0; - } - - if(nbyte > maxRead) - { - nbyte = maxRead; - } - - - if(nbyte > 0) - { - nRead = yaffs_ReadDataFromFile(obj,buf,pos,nbyte); - if(nRead >= 0) - { - h->position = pos + nRead; - } - else - { - //todo error - } - } - else - { - nRead = 0; - } - - } - - yaffsfs_Unlock(); - - - return (nRead >= 0) ? nRead : -1; - -} - -int yaffs_write(int fd, const void *buf, unsigned int nbyte) -{ - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int pos = 0; - int nWritten = -1; - int writeThrough = 0; - - yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); - - if(!h || !obj) - { - // bad handle - yaffsfs_SetError(-EBADF); - } - else if( h && obj && h->readOnly) - { - // todo error - } - else if( h && obj) - { - if(h->append) - { - pos = yaffs_GetObjectFileLength(obj); - } - else - { - pos = h->position; - } - - nWritten = yaffs_WriteDataToFile(obj,buf,pos,nbyte,writeThrough); - - if(nWritten >= 0) - { - h->position = pos + nWritten; - } - else - { - //todo error - } - - } - - yaffsfs_Unlock(); - - - return (nWritten >= 0) ? nWritten : -1; - -} - -int yaffs_truncate(int fd, off_t newSize) -{ - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int result = 0; - - yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); - - if(!h || !obj) - { - // bad handle - yaffsfs_SetError(-EBADF); - } - else - { - // resize the file - result = yaffs_ResizeFile(obj,newSize); - } - yaffsfs_Unlock(); - - - return (result) ? 0 : -1; - -} - -off_t yaffs_lseek(int fd, off_t offset, int whence) -{ - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int pos = -1; - int fSize = -1; - - yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); - - if(!h || !obj) - { - // bad handle - yaffsfs_SetError(-EBADF); - } - else if(whence == SEEK_SET) - { - if(offset >= 0) - { - pos = offset; - } - } - else if(whence == SEEK_CUR) - { - if( (h->position + offset) >= 0) - { - pos = (h->position + offset); - } - } - else if(whence == SEEK_END) - { - fSize = yaffs_GetObjectFileLength(obj); - if(fSize >= 0 && (fSize + offset) >= 0) - { - pos = fSize + offset; - } - } - - if(pos >= 0) - { - h->position = pos; - } - else - { - // todo error - } - - - yaffsfs_Unlock(); - - return pos; -} - - -int yaffsfs_DoUnlink(const char *path,int isDirectory) -{ - yaffs_Object *dir = NULL; - yaffs_Object *obj = NULL; - char *name; - int result = YAFFS_FAIL; - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL,path,0); - dir = yaffsfs_FindDirectory(NULL,path,&name,0); - if(!dir) - { - yaffsfs_SetError(-ENOTDIR); - } - else if(!obj) - { - yaffsfs_SetError(-ENOENT); - } - else if(!isDirectory && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { - yaffsfs_SetError(-EISDIR); - } - else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - { - yaffsfs_SetError(-ENOTDIR); - } - else - { - result = yaffs_Unlink(dir,name); - - if(result == YAFFS_FAIL && isDirectory) - { - yaffsfs_SetError(-ENOTEMPTY); - } - } - - yaffsfs_Unlock(); - - // todo error - - return (result == YAFFS_FAIL) ? -1 : 0; -} -int yaffs_rmdir(const char *path) -{ - return yaffsfs_DoUnlink(path,1); -} - -int yaffs_unlink(const char *path) -{ - return yaffsfs_DoUnlink(path,0); -} - -int yaffs_rename(const char *oldPath, const char *newPath) -{ - yaffs_Object *olddir = NULL; - yaffs_Object *newdir = NULL; - yaffs_Object *obj = NULL; - char *oldname; - char *newname; - int result= YAFFS_FAIL; - int renameAllowed = 1; - - yaffsfs_Lock(); - - olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0); - newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0); - obj = yaffsfs_FindObject(NULL,oldPath,0); - - if(!olddir || !newdir || !obj) - { - // bad file - yaffsfs_SetError(-EBADF); - renameAllowed = 0; - } - else if(olddir->myDev != newdir->myDev) - { - // oops must be on same device - // todo error - yaffsfs_SetError(-EXDEV); - renameAllowed = 0; - } - else if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { - // It is a directory, check that it is not being renamed to - // being its own decendent. - // Do this by tracing from the new directory back to the root, checking for obj - - yaffs_Object *xx = newdir; - - while( renameAllowed && xx) - { - if(xx == obj) - { - renameAllowed = 0; - } - xx = xx->parent; - } - if(!renameAllowed) yaffsfs_SetError(-EACCESS); - } - - if(renameAllowed) - { - result = yaffs_RenameObject(olddir,oldname,newdir,newname); - } - - yaffsfs_Unlock(); - - return (result == YAFFS_FAIL) ? -1 : 0; -} - - -static int yaffsfs_DoStat(yaffs_Object *obj,struct yaffs_stat *buf) -{ - int retVal = -1; - - if(obj) - { - obj = yaffs_GetEquivalentObject(obj); - } - - if(obj && buf) - { - buf->st_dev = (int)obj->myDev->genericDevice; - buf->st_ino = obj->objectId; - buf->st_mode = obj->yst_mode & ~S_IFMT; // clear out file type bits - - if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { - buf->st_mode |= S_IFDIR; - } - else if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - buf->st_mode |= S_IFLNK; - } - else if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - { - buf->st_mode |= S_IFREG; - } - - buf->st_nlink = yaffs_GetObjectLinkCount(obj); - buf->st_uid = 0; - buf->st_gid = 0;; - buf->st_rdev = obj->yst_rdev; - buf->st_size = yaffs_GetObjectFileLength(obj); - buf->st_blksize = obj->myDev->nDataBytesPerChunk; - buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize; - buf->yst_atime = obj->yst_atime; - buf->yst_ctime = obj->yst_ctime; - buf->yst_mtime = obj->yst_mtime; - retVal = 0; - } - return retVal; -} - -static int yaffsfs_DoStatOrLStat(const char *path, struct yaffs_stat *buf,int doLStat) -{ - yaffs_Object *obj; - - int retVal = -1; - - yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); - - if(!doLStat && obj) - { - obj = yaffsfs_FollowLink(obj,0); - } - - if(obj) - { - retVal = yaffsfs_DoStat(obj,buf); - } - else - { - // todo error not found - yaffsfs_SetError(-ENOENT); - } - - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_stat(const char *path, struct yaffs_stat *buf) -{ - return yaffsfs_DoStatOrLStat(path,buf,0); -} - -int yaffs_lstat(const char *path, struct yaffs_stat *buf) -{ - return yaffsfs_DoStatOrLStat(path,buf,1); -} - -int yaffs_fstat(int fd, struct yaffs_stat *buf) -{ - yaffs_Object *obj; - - int retVal = -1; - - yaffsfs_Lock(); - obj = yaffsfs_GetHandleObject(fd); - - if(obj) - { - retVal = yaffsfs_DoStat(obj,buf); - } - else - { - // bad handle - yaffsfs_SetError(-EBADF); - } - - yaffsfs_Unlock(); - - return retVal; -} - -static int yaffsfs_DoChMod(yaffs_Object *obj,mode_t mode) -{ - int result = YAFFS_FAIL; - - if(obj) - { - obj = yaffs_GetEquivalentObject(obj); - } - - if(obj) - { - obj->yst_mode = mode; - obj->dirty = 1; - result = yaffs_FlushFile(obj,0); - } - - return result == YAFFS_OK ? 0 : -1; -} - - -int yaffs_chmod(const char *path, mode_t mode) -{ - yaffs_Object *obj; - - int retVal = -1; - - yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); - - if(obj) - { - retVal = yaffsfs_DoChMod(obj,mode); - } - else - { - // todo error not found - yaffsfs_SetError(-ENOENT); - } - - yaffsfs_Unlock(); - - return retVal; - -} - - -int yaffs_fchmod(int fd, mode_t mode) -{ - yaffs_Object *obj; - - int retVal = -1; - - yaffsfs_Lock(); - obj = yaffsfs_GetHandleObject(fd); - - if(obj) - { - retVal = yaffsfs_DoChMod(obj,mode); - } - else - { - // bad handle - yaffsfs_SetError(-EBADF); - } - - yaffsfs_Unlock(); - - return retVal; -} - - -int yaffs_mkdir(const char *path, mode_t mode) -{ - yaffs_Object *parent = NULL; - yaffs_Object *dir = NULL; - char *name; - int retVal= -1; - - yaffsfs_Lock(); - parent = yaffsfs_FindDirectory(NULL,path,&name,0); - if(parent) - dir = yaffs_MknodDirectory(parent,name,mode,0,0); - if(dir) - { - retVal = 0; - } - else - { - yaffsfs_SetError(-ENOSPC); // just assume no space for now - retVal = -1; - } - - yaffsfs_Unlock(); - - return retVal; -} - -int yaffs_mount(const char *path) -{ - int retVal=-1; - int result=YAFFS_FAIL; - yaffs_Device *dev=NULL; - char *dummy; - - T(YAFFS_TRACE_ALWAYS,("yaffs: Mounting %s\n",path)); - - yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path,&dummy); - if(dev) - { - if(!dev->isMounted) - { - result = yaffs_GutsInitialise(dev); - if(result == YAFFS_FAIL) - { - // todo error - mount failed - yaffsfs_SetError(-ENOMEM); - } - retVal = result ? 0 : -1; - - } - else - { - //todo error - already mounted. - yaffsfs_SetError(-EBUSY); - } - } - else - { - // todo error - no device - yaffsfs_SetError(-ENODEV); - } - yaffsfs_Unlock(); - return retVal; - -} - -int yaffs_unmount(const char *path) -{ - int retVal=-1; - yaffs_Device *dev=NULL; - char *dummy; - - yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path,&dummy); - if(dev) - { - if(dev->isMounted) - { - int i; - int inUse; - - yaffs_FlushEntireDeviceCache(dev); - yaffs_CheckpointSave(dev); - - for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++) - { - if(yaffsfs_handle[i].inUse && yaffsfs_handle[i].obj->myDev == dev) - { - inUse = 1; // the device is in use, can't unmount - } - } - - if(!inUse) - { - yaffs_Deinitialise(dev); - - retVal = 0; - } - else - { - // todo error can't unmount as files are open - yaffsfs_SetError(-EBUSY); - } - - } - else - { - //todo error - not mounted. - yaffsfs_SetError(-EINVAL); - - } - } - else - { - // todo error - no device - yaffsfs_SetError(-ENODEV); - } - yaffsfs_Unlock(); - return retVal; - -} - -loff_t yaffs_freespace(const char *path) -{ - loff_t retVal=-1; - yaffs_Device *dev=NULL; - char *dummy; - - yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path,&dummy); - if(dev && dev->isMounted) - { - retVal = yaffs_GetNumberOfFreeChunks(dev); - retVal *= dev->nDataBytesPerChunk; - - } - else - { - yaffsfs_SetError(-EINVAL); - } - - yaffsfs_Unlock(); - return retVal; -} - - - -void yaffs_initialise(yaffsfs_DeviceConfiguration *cfgList) -{ - - yaffsfs_DeviceConfiguration *cfg; - - yaffsfs_configurationList = cfgList; - - yaffsfs_InitHandles(); - - cfg = yaffsfs_configurationList; - - while(cfg && cfg->prefix && cfg->dev) - { - cfg->dev->isMounted = 0; - cfg->dev->removeObjectCallback = yaffsfs_RemoveObjectCallback; - cfg++; - } -} - - -// -// Directory search stuff. - -// -// Directory search context -// -// NB this is an opaque structure. - - -typedef struct -{ - __u32 magic; - yaffs_dirent de; /* directory entry being used by this dsc */ - char name[NAME_MAX+1]; /* name of directory being searched */ - yaffs_Object *dirObj; /* ptr to directory being searched */ - yaffs_Object *nextReturn; /* obj to be returned by next readddir */ - int offset; - struct list_head others; -} yaffsfs_DirectorySearchContext; - - - -static struct list_head search_contexts; - - -static void yaffsfs_SetDirRewound(yaffsfs_DirectorySearchContext *dsc) -{ - if(dsc && - dsc->dirObj && - dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){ - - dsc->offset = 0; - - if( list_empty(&dsc->dirObj->variant.directoryVariant.children)){ - dsc->nextReturn = NULL; - } else { - dsc->nextReturn = list_entry(dsc->dirObj->variant.directoryVariant.children.next, - yaffs_Object,siblings); - } - } else { - /* Hey someone isn't playing nice! */ - } -} - -static void yaffsfs_DirAdvance(yaffsfs_DirectorySearchContext *dsc) -{ - if(dsc && - dsc->dirObj && - dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){ - - if( dsc->nextReturn == NULL || - list_empty(&dsc->dirObj->variant.directoryVariant.children)){ - dsc->nextReturn = NULL; - } else { - struct list_head *next = dsc->nextReturn->siblings.next; - - if( next == &dsc->dirObj->variant.directoryVariant.children) - dsc->nextReturn = NULL; /* end of list */ - else - dsc->nextReturn = list_entry(next,yaffs_Object,siblings); - } - } else { - /* Hey someone isn't playing nice! */ - } -} - -static void yaffsfs_RemoveObjectCallback(yaffs_Object *obj) -{ - - struct list_head *i; - yaffsfs_DirectorySearchContext *dsc; - - /* if search contexts not initilised then skip */ - if(!search_contexts.next) - return; - - /* Iteratethrough the directory search contexts. - * If any are the one being removed, then advance the dsc to - * the next one to prevent a hanging ptr. - */ - list_for_each(i, &search_contexts) { - if (i) { - dsc = list_entry(i, yaffsfs_DirectorySearchContext,others); - if(dsc->nextReturn == obj) - yaffsfs_DirAdvance(dsc); - } - } - -} - -yaffs_DIR *yaffs_opendir(const char *dirname) -{ - yaffs_DIR *dir = NULL; - yaffs_Object *obj = NULL; - yaffsfs_DirectorySearchContext *dsc = NULL; - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL,dirname,0); - - if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { - - dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext)); - dir = (yaffs_DIR *)dsc; - if(dsc) - { - memset(dsc,0,sizeof(yaffsfs_DirectorySearchContext)); - dsc->magic = YAFFS_MAGIC; - dsc->dirObj = obj; - strncpy(dsc->name,dirname,NAME_MAX); - INIT_LIST_HEAD(&dsc->others); - - if(!search_contexts.next) - INIT_LIST_HEAD(&search_contexts); - - list_add(&dsc->others,&search_contexts); - yaffsfs_SetDirRewound(dsc); } - - } - - yaffsfs_Unlock(); - - return dir; -} - -struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) -{ - yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; - struct yaffs_dirent *retVal = NULL; - - yaffsfs_Lock(); - - if(dsc && dsc->magic == YAFFS_MAGIC){ - yaffsfs_SetError(0); - if(dsc->nextReturn){ - dsc->de.d_ino = yaffs_GetEquivalentObject(dsc->nextReturn)->objectId; - dsc->de.d_dont_use = (unsigned)dsc->nextReturn; - dsc->de.d_off = dsc->offset++; - yaffs_GetObjectName(dsc->nextReturn,dsc->de.d_name,NAME_MAX); - if(strlen(dsc->de.d_name) == 0) - { - // this should not happen! - strcpy(dsc->de.d_name,"zz"); - } - dsc->de.d_reclen = sizeof(struct yaffs_dirent); - retVal = &dsc->de; - yaffsfs_DirAdvance(dsc); - } else - retVal = NULL; - } - else - { - yaffsfs_SetError(-EBADF); - } - - yaffsfs_Unlock(); - - return retVal; - -} - - -void yaffs_rewinddir(yaffs_DIR *dirp) -{ - yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; - - yaffsfs_Lock(); - - yaffsfs_SetDirRewound(dsc); - - yaffsfs_Unlock(); -} - - -int yaffs_closedir(yaffs_DIR *dirp) -{ - yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; - - yaffsfs_Lock(); - dsc->magic = 0; - list_del(&dsc->others); /* unhook from list */ - YFREE(dsc); - yaffsfs_Unlock(); - return 0; -} - -// end of directory stuff - - -int yaffs_symlink(const char *oldpath, const char *newpath) -{ - yaffs_Object *parent = NULL; - yaffs_Object *obj; - char *name; - int retVal= -1; - int mode = 0; // ignore for now - - yaffsfs_Lock(); - parent = yaffsfs_FindDirectory(NULL,newpath,&name,0); - obj = yaffs_MknodSymLink(parent,name,mode,0,0,oldpath); - if(obj) - { - retVal = 0; - } - else - { - yaffsfs_SetError(-ENOSPC); // just assume no space for now - retVal = -1; - } - - yaffsfs_Unlock(); - - return retVal; - -} - -int yaffs_readlink(const char *path, char *buf, int bufsiz) -{ - yaffs_Object *obj = NULL; - int retVal; - - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL,path,0); - - if(!obj) - { - yaffsfs_SetError(-ENOENT); - retVal = -1; - } - else if(obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK) - { - yaffsfs_SetError(-EINVAL); - retVal = -1; - } - else - { - char *alias = obj->variant.symLinkVariant.alias; - memset(buf,0,bufsiz); - strncpy(buf,alias,bufsiz - 1); - retVal = 0; - } - yaffsfs_Unlock(); - return retVal; -} - -int yaffs_link(const char *oldpath, const char *newpath) -{ - // Creates a link called newpath to existing oldpath - yaffs_Object *obj = NULL; - yaffs_Object *target = NULL; - int retVal = 0; - - - yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL,oldpath,0); - target = yaffsfs_FindObject(NULL,newpath,0); - - if(!obj) - { - yaffsfs_SetError(-ENOENT); - retVal = -1; - } - else if(target) - { - yaffsfs_SetError(-EEXIST); - retVal = -1; - } - else - { - yaffs_Object *newdir = NULL; - yaffs_Object *link = NULL; - - char *newname; - - newdir = yaffsfs_FindDirectory(NULL,newpath,&newname,0); - - if(!newdir) - { - yaffsfs_SetError(-ENOTDIR); - retVal = -1; - } - else if(newdir->myDev != obj->myDev) - { - yaffsfs_SetError(-EXDEV); - retVal = -1; - } - if(newdir && strlen(newname) > 0) - { - link = yaffs_Link(newdir,newname,obj); - if(link) - retVal = 0; - else - { - yaffsfs_SetError(-ENOSPC); - retVal = -1; - } - - } - } - yaffsfs_Unlock(); - - return retVal; -} - -int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev); - -int yaffs_DumpDevStruct(const char *path) -{ - char *rest; - - yaffs_Object *obj = yaffsfs_FindRoot(path,&rest); - - if(obj) - { - yaffs_Device *dev = obj->myDev; - - printf("\n" - "nPageWrites.......... %d\n" - "nPageReads........... %d\n" - "nBlockErasures....... %d\n" - "nGCCopies............ %d\n" - "garbageCollections... %d\n" - "passiveGarbageColl'ns %d\n" - "\n", - dev->nPageWrites, - dev->nPageReads, - dev->nBlockErasures, - dev->nGCCopies, - dev->garbageCollections, - dev->passiveGarbageCollections - ); - - } - return 0; -} diff --git a/fs/yaffs2/yaffsfs.h b/fs/yaffs2/yaffsfs.h deleted file mode 100644 index 95e7a91..0000000 --- a/fs/yaffs2/yaffsfs.h +++ /dev/null @@ -1,231 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * Header file for using yaffs in an application via - * a direct interface. - */ - - -#ifndef __YAFFSFS_H__ -#define __YAFFSFS_H__ - -#include "yaffscfg.h" -#include "yportenv.h" - - -//typedef long off_t; -//typedef long dev_t; -//typedef unsigned long mode_t; - - -#ifndef NAME_MAX -#define NAME_MAX 256 -#endif - -#ifndef O_RDONLY -#define O_RDONLY 00 -#endif - -#ifndef O_WRONLY -#define O_WRONLY 01 -#endif - -#ifndef O_RDWR -#define O_RDWR 02 -#endif - -#ifndef O_CREAT -#define O_CREAT 0100 -#endif - -#ifndef O_EXCL -#define O_EXCL 0200 -#endif - -#ifndef O_TRUNC -#define O_TRUNC 01000 -#endif - -#ifndef O_APPEND -#define O_APPEND 02000 -#endif - -#ifndef SEEK_SET -#define SEEK_SET 0 -#endif - -#ifndef SEEK_CUR -#define SEEK_CUR 1 -#endif - -#ifndef SEEK_END -#define SEEK_END 2 -#endif - -#ifndef EBUSY -#define EBUSY 16 -#endif - -#ifndef ENODEV -#define ENODEV 19 -#endif - -#ifndef EINVAL -#define EINVAL 22 -#endif - -#ifndef EBADF -#define EBADF 9 -#endif - -#ifndef EACCESS -#define EACCESS 13 -#endif - -#ifndef EXDEV -#define EXDEV 18 -#endif - -#ifndef ENOENT -#define ENOENT 2 -#endif - -#ifndef ENOSPC -#define ENOSPC 28 -#endif - -#ifndef ENOTEMPTY -#define ENOTEMPTY 39 -#endif - -#ifndef ENOMEM -#define ENOMEM 12 -#endif - -#ifndef EEXIST -#define EEXIST 17 -#endif - -#ifndef ENOTDIR -#define ENOTDIR 20 -#endif - -#ifndef EISDIR -#define EISDIR 21 -#endif - - -// Mode flags - -#ifndef S_IFMT -#define S_IFMT 0170000 -#endif - -#ifndef S_IFLNK -#define S_IFLNK 0120000 -#endif - -#ifndef S_IFDIR -#define S_IFDIR 0040000 -#endif - -#ifndef S_IFREG -#define S_IFREG 0100000 -#endif - -#ifndef S_IREAD -#define S_IREAD 0000400 -#endif - -#ifndef S_IWRITE -#define S_IWRITE 0000200 -#endif - - - - -struct yaffs_dirent{ - long d_ino; /* inode number */ - off_t d_off; /* offset to this dirent */ - unsigned short d_reclen; /* length of this d_name */ - char d_name [NAME_MAX+1]; /* file name (null-terminated) */ - unsigned d_dont_use; /* debug pointer, not for public consumption */ -}; - -typedef struct yaffs_dirent yaffs_dirent; - - -typedef struct __opaque yaffs_DIR; - - - -struct yaffs_stat{ - int st_dev; /* device */ - int st_ino; /* inode */ - mode_t st_mode; /* protection */ - int st_nlink; /* number of hard links */ - int st_uid; /* user ID of owner */ - int st_gid; /* group ID of owner */ - unsigned st_rdev; /* device type (if inode device) */ - off_t st_size; /* total size, in bytes */ - unsigned long st_blksize; /* blocksize for filesystem I/O */ - unsigned long st_blocks; /* number of blocks allocated */ - unsigned long yst_atime; /* time of last access */ - unsigned long yst_mtime; /* time of last modification */ - unsigned long yst_ctime; /* time of last change */ -}; - -int yaffs_open(const char *path, int oflag, int mode) ; -int yaffs_read(int fd, void *buf, unsigned int nbyte) ; -int yaffs_write(int fd, const void *buf, unsigned int nbyte) ; -int yaffs_close(int fd) ; -off_t yaffs_lseek(int fd, off_t offset, int whence) ; -int yaffs_truncate(int fd, off_t newSize); - -int yaffs_unlink(const char *path) ; -int yaffs_rename(const char *oldPath, const char *newPath) ; - -int yaffs_stat(const char *path, struct yaffs_stat *buf) ; -int yaffs_lstat(const char *path, struct yaffs_stat *buf) ; -int yaffs_fstat(int fd, struct yaffs_stat *buf) ; - -int yaffs_chmod(const char *path, mode_t mode); -int yaffs_fchmod(int fd, mode_t mode); - -int yaffs_mkdir(const char *path, mode_t mode) ; -int yaffs_rmdir(const char *path) ; - -yaffs_DIR *yaffs_opendir(const char *dirname) ; -struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) ; -void yaffs_rewinddir(yaffs_DIR *dirp) ; -int yaffs_closedir(yaffs_DIR *dirp) ; - -int yaffs_mount(const char *path) ; -int yaffs_unmount(const char *path) ; - -int yaffs_symlink(const char *oldpath, const char *newpath); -int yaffs_readlink(const char *path, char *buf, int bufsiz); - -int yaffs_link(const char *oldpath, const char *newpath); -int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev); - -loff_t yaffs_freespace(const char *path); - -void yaffs_initialise(yaffsfs_DeviceConfiguration *configList); - -int yaffs_StartUp(void); - -#endif diff --git a/fs/yaffs2/yaffsinterface.h b/fs/yaffs2/yaffsinterface.h deleted file mode 100644 index 810837a..0000000 --- a/fs/yaffs2/yaffsinterface.h +++ /dev/null @@ -1,21 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFSINTERFACE_H__ -#define __YAFFSINTERFACE_H__ - -int yaffs_Initialise(unsigned nBlocks); - -#endif diff --git a/fs/yaffs2/ydirectenv.h b/fs/yaffs2/ydirectenv.h deleted file mode 100644 index b555810..0000000 --- a/fs/yaffs2/ydirectenv.h +++ /dev/null @@ -1,92 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * ydirectenv.h: Environment wrappers for YAFFS direct. - */ - -#ifndef __YDIRECTENV_H__ -#define __YDIRECTENV_H__ - -/* Direct interface */ - -#include "devextras.h" - -/* XXX U-BOOT XXX */ -#if 0 -#include "stdlib.h" -#include "stdio.h" -#include "string.h" -#include "assert.h" -#endif -#include "yaffs_malloc.h" - -/* XXX U-BOOT XXX */ -#if 0 -#define YBUG() assert(1) -#endif - -#define YCHAR char -#define YUCHAR unsigned char -#define _Y(x) x -#define yaffs_strcpy(a,b) strcpy(a,b) -#define yaffs_strncpy(a,b,c) strncpy(a,b,c) -#define yaffs_strncmp(a,b,c) strncmp(a,b,c) -#define yaffs_strlen(s) strlen(s) -#define yaffs_sprintf sprintf -#define yaffs_toupper(a) toupper(a) - -#ifdef NO_Y_INLINE -#define Y_INLINE -#else -#define Y_INLINE inline -#endif - -#define YMALLOC(x) yaffs_malloc(x) -#define YFREE(x) free(x) -#define YMALLOC_ALT(x) yaffs_malloc(x) -#define YFREE_ALT(x) free(x) - -#define YMALLOC_DMA(x) yaffs_malloc(x) - -#define YYIELD() do {} while(0) - - - -//#define YINFO(s) YPRINTF(( __FILE__ " %d %s\n",__LINE__,s)) -//#define YALERT(s) YINFO(s) - - -#define TENDSTR "\n" -#define TSTR(x) x -#define TOUT(p) printf p - - -#define YAFFS_LOSTNFOUND_NAME "lost+found" -#define YAFFS_LOSTNFOUND_PREFIX "obj" -//#define YPRINTF(x) printf x - -#include "yaffscfg.h" - -#define Y_CURRENT_TIME yaffsfs_CurrentTime() -#define Y_TIME_CONVERT(x) x - -#define YAFFS_ROOT_MODE 0666 -#define YAFFS_LOSTNFOUND_MODE 0666 - -#define yaffs_SumCompare(x,y) ((x) == (y)) -#define yaffs_strcmp(a,b) strcmp(a,b) - -#endif diff --git a/fs/yaffs2/yportenv.h b/fs/yaffs2/yportenv.h deleted file mode 100644 index bbab14d..0000000 --- a/fs/yaffs2/yportenv.h +++ /dev/null @@ -1,193 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2007 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning charles@aleph1.co.uk - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - - -#ifndef __YPORTENV_H__ -#define __YPORTENV_H__ - -/* XXX U-BOOT XXX */ -#ifndef CONFIG_YAFFS_DIRECT -#define CONFIG_YAFFS_DIRECT -#endif - -#if defined CONFIG_YAFFS_WINCE - -#include "ywinceenv.h" - -/* XXX U-BOOT XXX */ -#elif 0 /* defined __KERNEL__ */ - -#include "moduleconfig.h" - -/* Linux kernel */ -#include <linux/version.h> -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)) -#include <linux/config.h> -#endif -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> - -#define YCHAR char -#define YUCHAR unsigned char -#define _Y(x) x -#define yaffs_strcpy(a,b) strcpy(a,b) -#define yaffs_strncpy(a,b,c) strncpy(a,b,c) -#define yaffs_strncmp(a,b,c) strncmp(a,b,c) -#define yaffs_strlen(s) strlen(s) -#define yaffs_sprintf sprintf -#define yaffs_toupper(a) toupper(a) - -#define Y_INLINE inline - -#define YAFFS_LOSTNFOUND_NAME "lost+found" -#define YAFFS_LOSTNFOUND_PREFIX "obj" - -/* #define YPRINTF(x) printk x */ -#define YMALLOC(x) kmalloc(x,GFP_KERNEL) -#define YFREE(x) kfree(x) -#define YMALLOC_ALT(x) vmalloc(x) -#define YFREE_ALT(x) vfree(x) -#define YMALLOC_DMA(x) YMALLOC(x) - -// KR - added for use in scan so processes aren't blocked indefinitely. -#define YYIELD() schedule() - -#define YAFFS_ROOT_MODE 0666 -#define YAFFS_LOSTNFOUND_MODE 0666 - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) -#define Y_CURRENT_TIME CURRENT_TIME.tv_sec -#define Y_TIME_CONVERT(x) (x).tv_sec -#else -#define Y_CURRENT_TIME CURRENT_TIME -#define Y_TIME_CONVERT(x) (x) -#endif - -#define yaffs_SumCompare(x,y) ((x) == (y)) -#define yaffs_strcmp(a,b) strcmp(a,b) - -#define TENDSTR "\n" -#define TSTR(x) KERN_WARNING x -#define TOUT(p) printk p - -#define yaffs_trace(mask, fmt, args...) \ - do { if ((mask) & (yaffs_traceMask|YAFFS_TRACE_ERROR)) \ - printk(KERN_WARNING "yaffs: " fmt, ## args); \ - } while (0) - -#define compile_time_assertion(assertion) \ - ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; }) - -#elif defined CONFIG_YAFFS_DIRECT - -/* Direct interface */ -#include "ydirectenv.h" - -#elif defined CONFIG_YAFFS_UTIL - -/* Stuff for YAFFS utilities */ - -#include "stdlib.h" -#include "stdio.h" -#include "string.h" - -#include "devextras.h" - -#define YMALLOC(x) malloc(x) -#define YFREE(x) free(x) -#define YMALLOC_ALT(x) malloc(x) -#define YFREE_ALT(x) free(x) - -#define YCHAR char -#define YUCHAR unsigned char -#define _Y(x) x -#define yaffs_strcpy(a,b) strcpy(a,b) -#define yaffs_strncpy(a,b,c) strncpy(a,b,c) -#define yaffs_strlen(s) strlen(s) -#define yaffs_sprintf sprintf -#define yaffs_toupper(a) toupper(a) - -#define Y_INLINE inline - -/* #define YINFO(s) YPRINTF(( __FILE__ " %d %s\n",__LINE__,s)) */ -/* #define YALERT(s) YINFO(s) */ - -#define TENDSTR "\n" -#define TSTR(x) x -#define TOUT(p) printf p - -#define YAFFS_LOSTNFOUND_NAME "lost+found" -#define YAFFS_LOSTNFOUND_PREFIX "obj" -/* #define YPRINTF(x) printf x */ - -#define YAFFS_ROOT_MODE 0666 -#define YAFFS_LOSTNFOUND_MODE 0666 - -#define yaffs_SumCompare(x,y) ((x) == (y)) -#define yaffs_strcmp(a,b) strcmp(a,b) - -#else -/* Should have specified a configuration type */ -#error Unknown configuration - -#endif - -/* see yaffs_fs.c */ -extern unsigned int yaffs_traceMask; -extern unsigned int yaffs_wr_attempts; - -/* - * Tracing flags. - * The flags masked in YAFFS_TRACE_ALWAYS are always traced. - */ - -#define YAFFS_TRACE_OS 0x00000002 -#define YAFFS_TRACE_ALLOCATE 0x00000004 -#define YAFFS_TRACE_SCAN 0x00000008 -#define YAFFS_TRACE_BAD_BLOCKS 0x00000010 -#define YAFFS_TRACE_ERASE 0x00000020 -#define YAFFS_TRACE_GC 0x00000040 -#define YAFFS_TRACE_WRITE 0x00000080 -#define YAFFS_TRACE_TRACING 0x00000100 -#define YAFFS_TRACE_DELETION 0x00000200 -#define YAFFS_TRACE_BUFFERS 0x00000400 -#define YAFFS_TRACE_NANDACCESS 0x00000800 -#define YAFFS_TRACE_GC_DETAIL 0x00001000 -#define YAFFS_TRACE_SCAN_DEBUG 0x00002000 -#define YAFFS_TRACE_MTD 0x00004000 -#define YAFFS_TRACE_CHECKPOINT 0x00008000 - -#define YAFFS_TRACE_VERIFY 0x00010000 -#define YAFFS_TRACE_VERIFY_NAND 0x00020000 -#define YAFFS_TRACE_VERIFY_FULL 0x00040000 -#define YAFFS_TRACE_VERIFY_ALL 0x000F0000 - - -#define YAFFS_TRACE_ERROR 0x40000000 -#define YAFFS_TRACE_BUG 0x80000000 -#define YAFFS_TRACE_ALWAYS 0xF0000000 - - -#define T(mask,p) do{ if((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p);} while(0) - -#ifndef CONFIG_YAFFS_WINCE -#define YBUG() T(YAFFS_TRACE_BUG,(TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),__LINE__)) -#endif - -#endif