From 911af577de4e444622d46500c1f9a37ab4335d3a Mon Sep 17 00:00:00 2001 From: Eryu Guan Date: Tue, 28 Jul 2015 15:08:41 -0400 Subject: [PATCH] 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 Signed-off-by: Eryu Guan Signed-off-by: Theodore Ts'o --- fs/ext4/inode.c | 8 ++++++++ 1 file changed, 8 insertions(+) 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);