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Btrfs: truncate: don't update inode->i_blocks when extent is a hole

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I think check whether extent is a hole before update 'inode->i_blocks'
is unconditional required. (original codes check it only when
del_item isn't equal to 0)

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan 2007-09-17 11:13:11 -04:00 committed by Chris Mason
parent 23223584e4
commit bab9fb035f
1 changed files with 6 additions and 4 deletions
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10
fs/btrfs/inode.c
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@ -595,6 +595,7 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
btrfs_file_extent_type(fi) !=
BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
extent_start = btrfs_file_extent_disk_blocknr(fi);
if (!del_item) {
u64 orig_num_blocks =
btrfs_file_extent_num_blocks(fi);
@ -604,12 +605,13 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
extent_num_blocks >>= inode->i_blkbits;
btrfs_set_file_extent_num_blocks(fi,
extent_num_blocks);
inode->i_blocks -= (orig_num_blocks -
extent_num_blocks) << 3;
num_dec = (orig_num_blocks -
extent_num_blocks) << 3;
if (extent_start != 0) {
inode->i_blocks -= num_dec;
}
btrfs_mark_buffer_dirty(path->nodes[0]);
} else {
extent_start =
btrfs_file_extent_disk_blocknr(fi);
extent_num_blocks =
btrfs_file_extent_disk_num_blocks(fi);
/* FIXME blocksize != 4096 */