cifs: force interface update before a fresh session setup

commit d9a6d78096056a3cb5c5f07a730ab92f2f9ac4e6 upstream.

During a session reconnect, it is possible that the
server moved to another physical server (happens in case
of Azure files). So at this time, force a query of server
interfaces again (in case of multichannel session), such
that the secondary channels connect to the right
IP addresses (possibly updated now).

Cc: stable@vger.kernel.org
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c
index 5b8db0a..6ca1e00 100644 (file)
--- a/fs/smb/client/connect.c
+++ b/fs/smb/client/connect.c
@@ -4205,8 +4205,12 @@ cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
        is_binding = !CIFS_ALL_CHANS_NEED_RECONNECT(ses);
        spin_unlock(&ses->chan_lock);
 
-       if (!is_binding)
+       if (!is_binding) {
                ses->ses_status = SES_IN_SETUP;
+
+               /* force iface_list refresh */
+               ses->iface_last_update = 0;
+       }
        spin_unlock(&ses->ses_lock);
 
        /* update ses ip_addr only for primary chan */