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authorMiao Xie <miaox@cn.fujitsu.com>2012-01-12 19:10:12 -0500
committerChris Mason <chris.mason@oracle.com>2012-01-16 15:28:54 -0500
commitf70a9a6b94af86fca069a7552ab672c31b457786 (patch)
tree0a62930b2540e11b877a1ead4050c55638bbd874 /fs
parent7ad85bb76a61801362701b77c5cee5aa09f35369 (diff)
downloadlinaro-lsk-f70a9a6b94af86fca069a7552ab672c31b457786.tar.gz
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/inode.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5f8ba210c0a..946a7f1b329 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3009,7 +3009,6 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
int pending_del_nr = 0;
int pending_del_slot = 0;
int extent_type = -1;
- int encoding;
int ret;
int err = 0;
u64 ino = btrfs_ino(inode);
@@ -3059,7 +3058,6 @@ search_again:
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
found_type = btrfs_key_type(&found_key);
- encoding = 0;
if (found_key.objectid != ino)
break;
@@ -3072,10 +3070,6 @@ search_again:
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
extent_type = btrfs_file_extent_type(leaf, fi);
- encoding = btrfs_file_extent_compression(leaf, fi);
- encoding |= btrfs_file_extent_encryption(leaf, fi);
- encoding |= btrfs_file_extent_other_encoding(leaf, fi);
-
if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
item_end +=
btrfs_file_extent_num_bytes(leaf, fi);
@@ -3103,7 +3097,7 @@ search_again:
if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
extent_start = btrfs_file_extent_disk_bytenr(leaf, fi);
- if (!del_item && !encoding) {
+ if (!del_item) {
u64 orig_num_bytes =
btrfs_file_extent_num_bytes(leaf, fi);
extent_num_bytes = new_size -