Re: [U-Boot] [PATCH v3] fs/ext4/ext4fs.c, fs/fs.c fs/fat/fat_write.c: Adjust 64bit math methods

On 26 November 2014 at 15:03, Tom Rini trini@ti.com wrote:

The changes to introduce loff_t into filesize means that we need to do 64bit math on 32bit platforms. Make sure we use the right wrappers for these operations.

Cc: Daniel Schwierzeck daniel.schwierzeck@gmail.com Cc: Suriyan Ramasami suriyan.r@gmail.com Cc: Simon Glass sjg@chromium.org Signed-off-by: Tom Rini trini@ti.com

Reviewed-by: Simon Glass sjg@chromium.org

---

Changes in v3:

• Fix bug Simon pointed out in fs/fs.c

Changes in v2:

• Correct fs/fat/fat_write.c

---

fs/ext4/ext4fs.c | 11 ++++++----- fs/fat/fat_write.c | 10 ++++++---- fs/fs.c | 6 ++++-- 3 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c index 943b5bc..258b9379 100644 --- a/fs/ext4/ext4fs.c +++ b/fs/ext4/ext4fs.c @@ -25,6 +25,7 @@ #include <ext_common.h> #include <ext4fs.h> #include "ext4_common.h" +#include <div64.h>

int ext4fs_symlinknest; struct ext_filesystem ext_fs; @@ -67,11 +68,11 @@ int ext4fs_read_file(struct ext2fs_node *node, loff_t pos, if (len > filesize) len = filesize;

•   blockcnt = ((len + pos) + blocksize - 1) / blocksize;
  

•   blockcnt = lldiv(((len + pos) + blocksize - 1), blocksize);
  
  

•   for (i = pos / blocksize; i < blockcnt; i++) {
  

•   for (i = lldiv(pos, blocksize); i < blockcnt; i++) {
            lbaint_t blknr;
  

•           int blockoff = pos % blocksize;
  

•           int blockoff = pos - (blocksize * i);
            int blockend = blocksize;
            int skipfirst = 0;
            blknr = read_allocated_block(&(node->inode), i);
  

@@ -82,7 +83,7 @@ int ext4fs_read_file(struct ext2fs_node *node, loff_t pos,

            /* Last block.  */
            if (i == blockcnt - 1) {

•                   blockend = (len + pos) % blocksize;
  

•                   blockend = (len + pos) - (blocksize * i);
  
                    /* The last portion is exactly blocksize. */
                    if (!blockend)
  

@@ -90,7 +91,7 @@ int ext4fs_read_file(struct ext2fs_node *node, loff_t pos, }

            /* First block. */

•           if (i == pos / blocksize) {
  

•           if (i == lldiv(pos, blocksize)) {
                    skipfirst = blockoff;
                    blockend -= skipfirst;
            }
  

diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c index 88dd495..473723b 100644 --- a/fs/fat/fat_write.c +++ b/fs/fat/fat_write.c @@ -13,6 +13,8 @@ #include <asm/byteorder.h> #include <part.h> #include <linux/ctype.h> +#include <div64.h> +#include <linux/math64.h> #include "fat.c"

static void uppercase(char *str, int len) @@ -770,7 +772,7 @@ static void fill_dentry(fsdata *mydata, dir_entry *dentptr, */ static int check_overflow(fsdata *mydata, __u32 clustnum, loff_t size) {

•   __u32 startsect, sect_num;
  

•   __u32 startsect, sect_num, offset;
  
    if (clustnum > 0) {
            startsect = mydata->data_begin +
  

@@ -779,13 +781,13 @@ static int check_overflow(fsdata *mydata, __u32 clustnum, loff_t size) startsect = mydata->rootdir_sect; }

•   sect_num = size / mydata->sect_size;
  

•   if (size % mydata->sect_size)
  

•   sect_num = div_u64_rem(size, mydata->sect_size, &offset);
  

•   if (offset != 0)
            sect_num++;
  
    if (startsect + sect_num > cur_part_info.start + total_sector)
            return -1;
  

•   return 0;
  

}

diff --git a/fs/fs.c b/fs/fs.c index 3da7860..ddd751c 100644 --- a/fs/fs.c +++ b/fs/fs.c @@ -23,6 +23,8 @@ #include <fs.h> #include <sandboxfs.h> #include <asm/io.h> +#include <div64.h> +#include <linux/math64.h>

DECLARE_GLOBAL_DATA_PTR;

@@ -399,7 +401,7 @@ int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], printf("%llu bytes read in %lu ms", len_read, time); if (time > 0) { puts(" (");

•           print_size(len_read / time * 1000, "/s");
  

•           print_size(div_u64(len_read, time) * 1000, "/s");
            puts(")");
    }
    puts("\n");
  

@@ -469,7 +471,7 @@ int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], printf("%llu bytes written in %lu ms", len, time); if (time > 0) { puts(" (");

•           print_size(len / time * 1000, "/s");
  

•           print_size(div_u64(len, time) * 1000, "/s");
            puts(")");
    }
    puts("\n");
  

-- 1.7.9.5