Allow parsing vers=3.11 on cifs mount

Parses and recognizes "vers=3.1.1" on cifs mount and allows sending
0x0311 as a new CIFS/SMB3 dialect. Subsequent patches will add
the new negotiate contexts and updated session setup

Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Steve French <steve.french@primarydata.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 54cbe19d9c08..150dbe3e2822 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -393,6 +393,10 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
                 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
         else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
                 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
+#ifdef CONFIG_CIFS_SMB311
+        else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
+                cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
+#endif /* SMB311 */
         else {
                 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
                          le16_to_cpu(rsp->DialectRevision));