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ext4: update c/mtime on truncate up 

Commit 3da40c7b08 ("ext4: only call ext4_truncate when size <= isize")
introduced a bug that c/mtime is not updated on truncate up.

Fix the issue by setting c/mtime explicitly in the truncate up case.

Note that ftruncate(2) is not affected, so you won't see this bug using
truncate(1) and xfs_io(1).

Signed-off-by: Zirong Lang <zorro.lang@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Eryu Guan 2015-07-28 15:08:41 -04:00 committed by Theodore Ts'o
parent 841df7df19
commit 911af577de
1 changed files with 8 additions and 0 deletions
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8
fs/ext4/inode.c
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@ -4725,6 +4725,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
error = ext4_orphan_add(handle, inode); error = ext4_orphan_add(handle, inode);
orphan = 1; orphan = 1;
} }
/*
* Update c/mtime on truncate up, ext4_truncate() will
* update c/mtime in shrink case below
*/
if (!shrink) {
inode->i_mtime = ext4_current_time(inode);
inode->i_ctime = inode->i_mtime;
}
down_write(&EXT4_I(inode)->i_data_sem); down_write(&EXT4_I(inode)->i_data_sem);
EXT4_I(inode)->i_disksize = attr->ia_size; EXT4_I(inode)->i_disksize = attr->ia_size;
rc = ext4_mark_inode_dirty(handle, inode); rc = ext4_mark_inode_dirty(handle, inode);