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authorMingming Cao <cmm@us.ibm.com>2006-05-03 19:55:12 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-03 20:05:41 -0700
commit5dea5176e5c32ef9f0d1a41d28427b3bf6881b3a (patch)
treef7b6639fa6490bb9a519f50acf0c76fa087d295b
parent8683dc9990158c221e05959935e7dd50a956c574 (diff)
downloadlinux-5dea5176e5c32ef9f0d1a41d28427b3bf6881b3a.tar.bz2
[PATCH] ext3: multile block allocate little endian fixes
Some places in ext3 multiple block allocation code (in 2.6.17-rc3) don't handle the little endian well. This was resulting in *wrong* block numbers being assigned to in-memory block variables and then stored on disk eventually. The following patch has been verified to fix an ext3 filesystem failure when run ltp test on a 64 bit machine. Signed-off-by; Mingming Cao <cmm@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/ext3/inode.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 48ae0339af17..2edd7eec88fd 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -711,7 +711,7 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode,
* direct blocks blocks
*/
if (num == 0 && blks > 1) {
- current_block = le32_to_cpu(where->key + 1);
+ current_block = le32_to_cpu(where->key) + 1;
for (i = 1; i < blks; i++)
*(where->p + i ) = cpu_to_le32(current_block++);
}
@@ -724,7 +724,7 @@ static int ext3_splice_branch(handle_t *handle, struct inode *inode,
if (block_i) {
block_i->last_alloc_logical_block = block + blks - 1;
block_i->last_alloc_physical_block =
- le32_to_cpu(where[num].key + blks - 1);
+ le32_to_cpu(where[num].key) + blks - 1;
}
/* We are done with atomic stuff, now do the rest of housekeeping */
@@ -814,11 +814,13 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
/* Simplest case - block found, no allocation needed */
if (!partial) {
- first_block = chain[depth - 1].key;
+ first_block = le32_to_cpu(chain[depth - 1].key);
clear_buffer_new(bh_result);
count++;
/*map more blocks*/
while (count < maxblocks && count <= blocks_to_boundary) {
+ unsigned long blk;
+
if (!verify_chain(chain, partial)) {
/*
* Indirect block might be removed by
@@ -831,8 +833,9 @@ int ext3_get_blocks_handle(handle_t *handle, struct inode *inode,
count = 0;
break;
}
- if (le32_to_cpu(*(chain[depth-1].p+count) ==
- (first_block + count)))
+ blk = le32_to_cpu(*(chain[depth-1].p + count));
+
+ if (blk == first_block + count)
count++;
else
break;