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authorMiao Xie <miaox@cn.fujitsu.com>2012-09-06 04:04:57 -0600
committerChris Mason <chris.mason@fusionio.com>2012-10-01 15:19:14 -0400
commit903889f462409c816893abd02d88636f7b4a7774 (patch)
tree842dce20600c595ede74678ea259a872c86dd12b /fs
parent69ce977a179750915e04fcc12bfbe33e6c8f5132 (diff)
Btrfs: fix wrong size for the reservation when doing, file pre-allocation.
When we ran fsstress(a program in xfstests), the filesystem hung up when it is full. It was because the space reserved in btrfs_fallocate() was wrong, btrfs_fallocate() just used the size of the pre-allocation to reserve the space, didn't took the block size aligning into account, so the size of the reserved space was less than the allocated space, it caused the over reserve problem and made the filesystem hung up when invoking cow_file_range(). Fix it. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/file.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 793bc89c660..00279c9a7f3 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2000,7 +2000,7 @@ static long btrfs_fallocate(struct file *file, int mode,
* Make sure we have enough space before we do the
* allocation.
*/
- ret = btrfs_check_data_free_space(inode, len);
+ ret = btrfs_check_data_free_space(inode, alloc_end - alloc_start + 1);
if (ret)
return ret;
@@ -2107,7 +2107,7 @@ static long btrfs_fallocate(struct file *file, int mode,
out:
mutex_unlock(&inode->i_mutex);
/* Let go of our reservation. */
- btrfs_free_reserved_data_space(inode, len);
+ btrfs_free_reserved_data_space(inode, alloc_end - alloc_start + 1);
return ret;
}