cifs: update ctime and mtime during truncate

[ Upstream commit 5618303d8516f8ac5ecfe53ee8e8bc9a40eaf066 ]

As the man description of the truncate, if the size changed,
then the st_ctime and st_mtime fields should be updated. But
in cifs, we doesn't do it.

It lead the xfstests generic/313 failed.

So, add the ATTR_MTIME|ATTR_CTIME flags on attrs when change
the file size

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 528fe225b65a965c9de7a0c938f8b307142c2daa..d0d295a28b6e4933406c07a3accd73d1198f8fa7 100644 (file)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -2216,6 +2216,15 @@ set_size_out:
        if (rc == 0) {
                cifsInode->server_eof = attrs->ia_size;
                cifs_setsize(inode, attrs->ia_size);
+
+               /*
+                * The man page of truncate says if the size changed,
+                * then the st_ctime and st_mtime fields for the file
+                * are updated.
+                */
+               attrs->ia_ctime = attrs->ia_mtime = current_time(inode);
+               attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME;
+
                cifs_truncate_page(inode->i_mapping, inode->i_size);
        }