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[PATCH] bfs: fix endianness, signedness; add trivial bugfix

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* Makes BFS code endianness-clean.

* Fixes some signedness warnings.

* Fixes a problem in fs/bfs/inode.c:164 where inodes not synced to disk
  don't get fully marked as clean.  Here's how to reproduce it:

# mount -o loop -t bfs /bfs.img /mnt
# df -i /mnt
Filesystem            Inodes   IUsed   IFree IUse% Mounted on
/bfs.img                  48       1      47    3% /mnt
# df -k /mnt
Filesystem           1K-blocks      Used Available Use% Mounted on
/bfs.img                   512         5       508   1% /mnt
# cp 60k-archive.zip /mnt/mt.zip
# df -k /mnt
Filesystem           1K-blocks      Used Available Use% Mounted on
/bfs.img                   512        65       447  13% /mnt
# df -i /mnt
Filesystem            Inodes   IUsed   IFree IUse% Mounted on
/bfs.img                  48       2      46    5% /mnt
# rm /mnt/mt.zip
# echo $?
0

 [If the unlink happens before the buffers flush, the following happens:]

# df -i /mnt
Filesystem            Inodes   IUsed   IFree IUse% Mounted on
/bfs.img                  48       2      46    5% /mnt
# df -k /mnt
Filesystem           1K-blocks      Used Available Use% Mounted on
/bfs.img                   512        65       447  13% /mnt

 fs/bfs/bfs.h           |    1

Signed-off-by: Andrew Stribblehill <ads@wompom.org>
Cc: <tigran@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Stribblehill
2005-09-09 13:02:04 -07:00
committed by Linus Torvalds
parent 383f2835eb
commit fac92becda
5 changed files with 92 additions and 80 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/bfs/file.c
+13 -10
View File
@@ -40,8 +40,8 @@ static int bfs_move_block(unsigned long from, unsigned long to, struct super_blo
return 0;
}
static int bfs_move_blocks(struct super_block *sb, unsigned long start, unsigned long end,
unsigned long where)
static int bfs_move_blocks(struct super_block *sb, unsigned long start,
unsigned long end, unsigned long where)
{
unsigned long i;
@@ -57,20 +57,21 @@ static int bfs_move_blocks(struct super_block *sb, unsigned long start, unsigned
static int bfs_get_block(struct inode * inode, sector_t block,
struct buffer_head * bh_result, int create)
{
long phys;
unsigned long phys;
int err;
struct super_block *sb = inode->i_sb;
struct bfs_sb_info *info = BFS_SB(sb);
struct bfs_inode_info *bi = BFS_I(inode);
struct buffer_head *sbh = info->si_sbh;
if (block < 0 || block > info->si_blocks)
if (block > info->si_blocks)
return -EIO;
phys = bi->i_sblock + block;
if (!create) {
if (phys <= bi->i_eblock) {
dprintf("c=%d, b=%08lx, phys=%08lx (granted)\n", create, block, phys);
dprintf("c=%d, b=%08lx, phys=%09lx (granted)\n",
create, (unsigned long)block, phys);
map_bh(bh_result, sb, phys);
}
return 0;
@@ -80,7 +81,7 @@ static int bfs_get_block(struct inode * inode, sector_t block,
of blocks allocated for this file, we can grant it */
if (inode->i_size && phys <= bi->i_eblock) {
dprintf("c=%d, b=%08lx, phys=%08lx (interim block granted)\n",
create, block, phys);
create, (unsigned long)block, phys);
map_bh(bh_result, sb, phys);
return 0;
}
@@ -88,11 +89,12 @@ static int bfs_get_block(struct inode * inode, sector_t block,
/* the rest has to be protected against itself */
lock_kernel();
/* if the last data block for this file is the last allocated block, we can
extend the file trivially, without moving it anywhere */
/* if the last data block for this file is the last allocated
block, we can extend the file trivially, without moving it
anywhere */
if (bi->i_eblock == info->si_lf_eblk) {
dprintf("c=%d, b=%08lx, phys=%08lx (simple extension)\n",
create, block, phys);
create, (unsigned long)block, phys);
map_bh(bh_result, sb, phys);
info->si_freeb -= phys - bi->i_eblock;
info->si_lf_eblk = bi->i_eblock = phys;
@@ -114,7 +116,8 @@ static int bfs_get_block(struct inode * inode, sector_t block,
} else
err = 0;
dprintf("c=%d, b=%08lx, phys=%08lx (moved)\n", create, block, phys);
dprintf("c=%d, b=%08lx, phys=%08lx (moved)\n",
create, (unsigned long)block, phys);
bi->i_sblock = phys;
phys += block;
info->si_lf_eblk = bi->i_eblock = phys;