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ext4: Don't treat a truncation of a zero-length file as replace-via-truncate

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If a non-existent file is opened via O_WRONLY|O_CREAT|O_TRUNC, there's
no need to treat this as a true file truncation, so we shouldn't
activate the replace-via-truncate hueristic.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2009-06-09 09:54:40 -04:00
parent 9aee228607
commit 0eab928221
1 changed files with 2 additions and 1 deletions
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3
fs/ext4/inode.c
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@ -4127,7 +4127,8 @@ void ext4_truncate(struct inode *inode)
if (!ext4_can_truncate(inode))
return;
if (inode->i_size == 0 && !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC))
if (ei->i_disksize && inode->i_size == 0 &&
!test_opt(inode->i_sb, NO_AUTO_DA_ALLOC))
ei->i_state |= EXT4_STATE_DA_ALLOC_CLOSE;
if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) {