cifs: Send a logoff request before removing a smb session
Send a smb session logoff request before removing smb session off of the list.
On a signed smb session, remvoing a session off of the list before sending
a logoff request results in server returning an error for lack of
smb signature.
Never seen an error during smb logoff, so as per MS-SMB2 3.2.5.1,
not sure how an error during logoff should be retried. So for now,
if a server returns an error to a logoff request, log the error and
remove the session off of the list.
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 0ee6d24..b375709 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -431,13 +431,20 @@
return -EAGAIN;
}
- if (ses->status != CifsGood) {
- /* check if SMB session is bad because we are setting it up */
+ if (ses->status == CifsNew) {
if ((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) &&
(in_buf->Command != SMB_COM_NEGOTIATE))
return -EAGAIN;
/* else ok - we are setting up session */
}
+
+ if (ses->status == CifsExiting) {
+ /* check if SMB session is bad because we are setting it up */
+ if (in_buf->Command != SMB_COM_LOGOFF_ANDX)
+ return -EAGAIN;
+ /* else ok - we are shutting down session */
+ }
+
*ppmidQ = AllocMidQEntry(in_buf, ses->server);
if (*ppmidQ == NULL)
return -ENOMEM;