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authorPavel Shilovsky <pshilov@microsoft.com>2017-07-08 14:32:00 -0700
committerSteve French <smfrench@gmail.com>2017-07-08 17:23:10 -0500
commit511c54a2f69195b28afb9dd119f03787b1625bb4 (patch)
tree62ddef834e4a5b9298f662446dc49814c088756c /fs/cifs/cifssmb.c
parent4395d484b98154b28f895b722681710bdd40376c (diff)
CIFS: Reconnect expired SMB sessions
According to the MS-SMB2 spec (3.2.5.1.6) once the client receives STATUS_NETWORK_SESSION_EXPIRED error code from a server it should reconnect the current SMB session. Currently the client doesn't do that. This can result in subsequent client requests failing by the server. The patch adds an additional logic to the demultiplex thread to identify expired sessions and reconnect them. Cc: <stable@vger.kernel.org> Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/cifssmb.c')
-rw-r--r--fs/cifs/cifssmb.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index fbb0d4cbda41..72a53bd19865 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1460,6 +1460,13 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
return length;
server->total_read += length;
+ if (server->ops->is_session_expired &&
+ server->ops->is_session_expired(buf)) {
+ cifs_reconnect(server);
+ wake_up(&server->response_q);
+ return -1;
+ }
+
if (server->ops->is_status_pending &&
server->ops->is_status_pending(buf, server, 0)) {
cifs_discard_remaining_data(server);