| commit | f70a9a6b94af86fca069a7552ab672c31b457786 | |
| author | Miao Xie <miaox@cn.fujitsu.com> | |
| Fri, 13 Jan 2012 00:10:12 +0000 (12 19:10 -0500) | ||
| committer | Chris Mason <chris.mason@oracle.com> | |
| Mon, 16 Jan 2012 20:28:54 +0000 (16 15:28 -0500) | ||
| tree | 0a62930b2540e11b877a1ead4050c55638bbd874 | treesnapshot (tar.gz zip) |
| parent | 7ad85bb76a61801362701b77c5cee5aa09f35369 | commitdiff |
Btrfs: fix btrfsck error 400 when truncating a compressed
Reproduce steps:
# mkfs.btrfs /dev/sdb5
# mount /dev/sdb5 -o compress=lzo /mnt
# dd if=/dev/zero of=/mnt/tmpfile bs=128K count=1
# sync
# truncate -s 64K /mnt/tmpfile
root 5 inode 257 errors 400
This is because of the wrong if condition, which is used to check if we should
subtract the bytes of the dropped range from i_blocks/i_bytes of i-node or not.
When we truncate a compressed extent, btrfs substracts the bytes of the whole
extent, it's wrong. We should substract the real size that we truncate, no
matter it is a compressed extent or not. Fix it.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Reproduce steps:
# mkfs.btrfs /dev/sdb5
# mount /dev/sdb5 -o compress=lzo /mnt
# dd if=/dev/zero of=/mnt/tmpfile bs=128K count=1
# sync
# truncate -s 64K /mnt/tmpfile
root 5 inode 257 errors 400
This is because of the wrong if condition, which is used to check if we should
subtract the bytes of the dropped range from i_blocks/i_bytes of i-node or not.
When we truncate a compressed extent, btrfs substracts the bytes of the whole
extent, it's wrong. We should substract the real size that we truncate, no
matter it is a compressed extent or not. Fix it.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| fs/btrfs/inode.c | diffblobblamehistory |