Desc: ROMFS source code fs support
Signed-off-by: Michal Simek monstr@monstr.eu
diff --git a/fs/romfs/Makefile b/fs/romfs/Makefile index e69de29..937d755 100644 --- a/fs/romfs/Makefile +++ b/fs/romfs/Makefile @@ -0,0 +1,49 @@ +# +# (C) Copyright 2000-2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# See file CREDITS for list of people who contributed to this +# project. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of +# the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, +# MA 02111-1307 USA +# + +include $(TOPDIR)/config.mk + +LIB = $(obj)libromfs.a + +AOBJS = +COBJS = romfs.o + +SRCS := $(AOBJS:.o=.S) $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(AOBJS) $(COBJS)) + +#CPPFLAGS += + +all: $(LIB) $(AOBJS) + +$(LIB): $(obj).depend $(OBJS) + $(AR) $(ARFLAGS) $@ $(OBJS) + + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/fs/romfs/romfs.c b/fs/romfs/romfs.c index e69de29..15de3e1 100644 --- a/fs/romfs/romfs.c +++ b/fs/romfs/romfs.c @@ -0,0 +1,240 @@ +/* + * (C) Copyright 2007 Michal Simek + * + * Michal SIMEK monstr@monstr.eu + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <malloc.h> +#include <command.h> + +#if defined(CONFIG_CMD_JFFS2) + +#include <asm/byteorder.h> +#include <linux/stat.h> +#include <jffs2/jffs2.h> +#include <jffs2/load_kernel.h> + +#undef DEBUG_ROMFS + +/* ROMFS superblock */ +struct romfs_super { + u32 word0; + u32 word1; + u32 size; + u32 checksum; + char name[0]; +}; + +struct romfs_inode { + u32 next; + u32 spec; + u32 size; + u32 checksum; + char name[0]; +}; + +extern flash_info_t flash_info[]; +#define PART_OFFSET(x) (x->offset + flash_info[x->dev->id->num].start[0]) +#define ALIGN(x) (((x) & 0xfffffff0)) +#define HEADERSIZE(name) (0x20 + ALIGN(strlen(name))) + +static unsigned long romfs_resolve (unsigned long begin, unsigned long offset, + unsigned long size, int raw, char *filename) +{ + unsigned long inodeoffset = 0, nextoffset; + struct romfs_inode *inode; +#ifdef DEBUG_ROMFS + printf ("ROMFS_resolve: begin 0x%x, offset 0x%x, size 0x%x, raw 0x%x, \ + filename %s\n", begin, offset, size, raw, filename); +#endif + + while (inodeoffset < size) { + inode = (struct romfs_inode *)(begin + offset + inodeoffset); + offset = 0; + nextoffset = ALIGN (inode->next); +#ifdef DEBUG_ROMFS + printf("inode 0x%x, name %s - len 0x%x, next inode 0x%x, \ + compare names 0x%x\n", + inode, inode->name, strlen (inode->name), nextoffset, + strncmp (filename, inode->name, strlen (filename))); +#endif + if (!strncmp (filename, inode->name, strlen (inode->name))) { + char *p = strtok (NULL, "/"); + if (raw && (p == NULL || *p == '\0')) { + return offset + inodeoffset; + } + return romfs_resolve (begin, + inodeoffset + HEADERSIZE (inode->name), + size, raw, p); + } + inodeoffset = nextoffset; + } + + printf ("can't find corresponding entry\n"); + return 0; +} + +int romfs_load (char *loadoffset, struct part_info *info, char *filename) +{ + struct romfs_inode *inode; + struct romfs_super *sb; + char *data; + int pocet; + sb = (struct romfs_super *) PART_OFFSET (info); + + unsigned long offset; + + offset = romfs_resolve (PART_OFFSET (info), HEADERSIZE (sb->name), + sb->size, 1, strtok (filename, "/")); + if (offset <= 0) + return offset; + + inode = (struct romfs_inode *)(PART_OFFSET (info) + offset); + data = (char *)((int)inode + HEADERSIZE (inode->name)); + pocet = inode->size; + while (pocet--) { + *loadoffset++ = *data++; + } + return inode->size; +} + +static int romfs_list_inode (struct part_info *info, unsigned long offset) +{ + struct romfs_inode *inode = + (struct romfs_inode *)(PART_OFFSET (info) + offset); + struct romfs_inode *hardlink = NULL; + char str[3], *data; + +/* + * mapping spec.info means + * 0 hard link link destination [file header] + * 1 directory first file's header + * 2 regular file unused, must be zero [MBZ] + * 3 symbolic link unused, MBZ (file data is the link content) + * 4 block device 16/16 bits major/minor number + * 5 char device - " - + * 6 socket unused, MBZ + * 7 fifo unused, MBZ + */ + char attributes[] = "hdflbcsp"; + str[0] = attributes[inode->next & 0x7]; + str[1] = (inode->next & 0x8) ? 'x' : '-'; + str[2] = '\0'; + + if ((str[0] == 'b') || (str[0] == 'c')) { +#ifdef DEBUG_ROMFS + printf (" %s %3d,%3d %12s 0x%08x 0x%08x", str, + (inode->spec & 0xffff0000) >> 16, + inode->spec & 0x0000ffff, inode->name, inode, + inode->spec); +#else + printf (" %s %3d,%3d %12s", str, + (inode->spec & 0xffff0000) >> 16, + inode->spec & 0x0000ffff); +#endif + } else { +#ifdef DEBUG_ROMFS + printf (" %s %7d %12s 0x%08x 0x%08x", str, inode->size, + inode->name, inode, inode->spec); +#else + printf (" %s %7d %12s", str, inode->size, inode->name); +#endif + if (str[0] == 'l') { + data = (char *)((int)inode + HEADERSIZE (inode->name)); + puts (" -> "); + puts (data); + } + if (str[0] == 'h') { + hardlink = (struct romfs_inode *)(PART_OFFSET (info) + + inode->spec); + puts (" -> "); + puts (hardlink->name); + } + } + puts ("\n"); + return ALIGN (inode->next); +} + +int romfs_ls (struct part_info *info, char *filename) +{ + struct romfs_inode *inode; + unsigned long inodeoffset = 0, nextoffset; + unsigned long offset, size; + struct romfs_super *sb; + sb = (struct romfs_super *)PART_OFFSET (info); + + if (strlen (filename) == 0 || !strcmp (filename, "/")) { + offset = HEADERSIZE (sb->name); + size = sb->size; + } else { + offset = romfs_resolve (PART_OFFSET (info), + HEADERSIZE (sb->name), sb->size, 1, + strtok (filename, "/")); + + if (offset == 0) { + return offset; + } + inode = (struct romfs_inode *)(PART_OFFSET (info) + offset); + if ((inode->next & 0x7) != 1) { + return (romfs_list_inode (info, offset) > 0); + } + + size = sb->size; + offset = offset + HEADERSIZE (inode->name); + } + + inodeoffset = offset + inodeoffset; + while (inodeoffset < size) { + nextoffset = romfs_list_inode (info, inodeoffset); + if (nextoffset == 0) + break; + inodeoffset = nextoffset; + } + return 1; +} + +int romfs_info (struct part_info *info) +{ + struct romfs_super *sb; + sb = (struct romfs_super *)PART_OFFSET (info); + + printf ("name: \t\t%s, len %d B\n", sb->name, strlen (sb->name)); + printf ("size of SB:\t%d B\n", HEADERSIZE (sb->name)); + printf ("full size:\t%d B\n", sb->size); + printf ("checksum:\t0x%x\n", sb->checksum); + return 0; +} + +int romfs_check (struct part_info *info) +{ + struct romfs_super *sb; + if (info->dev->id->type != MTD_DEV_TYPE_NOR) + return 0; + + sb = (struct romfs_super *)PART_OFFSET (info); + if ((sb->word0 != 0x2D726F6D) || (sb->word1 != 0x3166732D)) { + return 0; + } + return 1; +} + +#endif