[PATCH 4.4 003/266] cifs: do not attempt cifs operation on smb2+ rename error
From: Greg Kroah-Hartman
Date: Wed May 15 2019 - 07:05:02 EST
From: Frank Sorenson <sorenson@xxxxxxxxxx>
commit 652727bbe1b17993636346716ae5867627793647 upstream.
A path-based rename returning EBUSY will incorrectly try opening
the file with a cifs (NT Create AndX) operation on an smb2+ mount,
which causes the server to force a session close.
If the mount is smb2+, skip the fallback.
Signed-off-by: Frank Sorenson <sorenson@xxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
CC: Stable <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
fs/cifs/inode.c | 4 ++++
1 file changed, 4 insertions(+)
@@ -1669,6 +1669,10 @@ cifs_do_rename(const unsigned int xid, s
if (rc == 0 || rc != -EBUSY)
+ /* Don't fall back to using SMB on SMB 2+ mount */
+ if (server->vals->protocol_id != 0)
+ goto do_rename_exit;
/* open-file renames don't work across directories */
if (to_dentry->d_parent != from_dentry->d_parent)