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authorEryu Guan <guaneryu@gmail.com>2015-07-28 15:08:41 -0400
committerTheodore Ts'o <tytso@mit.edu>2015-07-28 15:08:41 -0400
commit911af577de4e444622d46500c1f9a37ab4335d3a (patch)
tree5261fa696f6c26f21202578b08888b0b17077deb /fs/ext4
parent841df7df196237ea63233f0f9eaa41db53afd70f (diff)
downloadlinux-911af577de4e444622d46500c1f9a37ab4335d3a.tar.bz2
ext4: update c/mtime on truncate up
Commit 3da40c7b0898 ("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>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/inode.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index cecf9aa10811..2442eb065e19 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4725,6 +4725,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
error = ext4_orphan_add(handle, inode);
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);
EXT4_I(inode)->i_disksize = attr->ia_size;
rc = ext4_mark_inode_dirty(handle, inode);