CIFS: Move protocol specific negotiate code to ops struct

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>

6 files changed, 46 insertions, 21 deletions

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 844b77c2bc9c..8a4150573cf8 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -192,6 +192,10 @@ struct smb_version_operations {
         /* process transaction2 response */
         bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
                              char *, int);
+        /* check if we need to negotiate */
+        bool (*need_neg)(struct TCP_Server_Info *);
+        /* negotiate to the server */
+        int (*negotiate)(const unsigned int, struct cifs_ses *);
 };
 
 struct smb_version_values {
@@ -324,7 +328,7 @@ struct TCP_Server_Info {
         struct mutex srv_mutex;
         struct task_struct *tsk;
         char server_GUID[16];
-        char sec_mode;
+        __u16 sec_mode;
         bool session_estab; /* mark when very first sess is established */
         u16 dialect; /* dialect index that server chose */
         enum securityEnum secType;
@@ -459,7 +463,7 @@ struct cifs_ses {
         char *serverOS;         /* name of operating system underlying server */
         char *serverNOS;        /* name of network operating system of server */
         char *serverDomain;     /* security realm of server */
-        int Suid;               /* remote smb uid  */
+        __u64 Suid;             /* remote smb uid  */
         uid_t linux_uid;        /* overriding owner of files on the mount */
         uid_t cred_uid;         /* owner of credentials */
         int capabilities;
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index b37399491fa3..723a3273c6bb 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -178,11 +178,11 @@ extern void cifs_dfs_release_automount_timer(void);
 void cifs_proc_init(void);
 void cifs_proc_clean(void);
 
-extern int cifs_negotiate_protocol(unsigned int xid,
-                                  struct cifs_ses *ses);
+extern int cifs_negotiate_protocol(const unsigned int xid,
+                                   struct cifs_ses *ses);
 extern int cifs_setup_session(unsigned int xid, struct cifs_ses *ses,
                         struct nls_table *nls_info);
-extern int CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses);
+extern int CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses);
 
 extern int CIFSTCon(unsigned int xid, struct cifs_ses *ses,
                         const char *tree, struct cifs_tcon *tcon,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 92bbd8487ead..ae59d6e4e4f5 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -396,7 +396,7 @@ static inline void inc_rfc1001_len(void *pSMB, int count)
 }
 
 int
-CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses)
+CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
 {
         NEGOTIATE_REQ *pSMB;
         NEGOTIATE_RSP *pSMBr;
@@ -480,7 +480,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses)
                         rc = -EOPNOTSUPP;
                         goto neg_err_exit;
                 }
-                server->sec_mode = (__u8)le16_to_cpu(rsp->SecurityMode);
+                server->sec_mode = le16_to_cpu(rsp->SecurityMode);
                 server->maxReq = min_t(unsigned int,
                                        le16_to_cpu(rsp->MaxMpxCount),
                                        cifs_max_pending);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 6d846e7624d0..03389f59390f 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -407,7 +407,7 @@ cifs_echo_request(struct work_struct *work)
          * done, which is indicated by maxBuf != 0. Also, no need to ping if
          * we got a response recently
          */
-        if (server->maxBuf == 0 ||
+        if (!server->ops->need_neg || server->ops->need_neg(server) ||
             time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
                 goto requeue_echo;
 
@@ -2406,7 +2406,8 @@ static bool warned_on_ntlm;  /* globals init to false automatically */
 static struct cifs_ses *
 cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
 {
-        int rc = -ENOMEM, xid;
+        int rc = -ENOMEM;
+        unsigned int xid;
         struct cifs_ses *ses;
         struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
         struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
@@ -3960,24 +3961,22 @@ cifs_umount(struct cifs_sb_info *cifs_sb)
         kfree(cifs_sb);
 }
 
-int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses)
+int
+cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
 {
         int rc = 0;
         struct TCP_Server_Info *server = ses->server;
 
+        if (!server->ops->need_neg || !server->ops->negotiate)
+                return -ENOSYS;
+
         /* only send once per connect */
-        if (server->maxBuf != 0)
+        if (!server->ops->need_neg(server))
                 return 0;
 
         set_credits(server, 1);
-        rc = CIFSSMBNegotiate(xid, ses);
-        if (rc == -EAGAIN) {
-                /* retry only once on 1st time connection */
-                set_credits(server, 1);
-                rc = CIFSSMBNegotiate(xid, ses);
-                if (rc == -EAGAIN)
-                        rc = -EHOSTDOWN;
-        }
+
+        rc = server->ops->negotiate(xid, ses);
         if (rc == 0) {
                 spin_lock(&GlobalMid_Lock);
                 if (server->tcpStatus == CifsNeedNegotiate)
@@ -3985,7 +3984,6 @@ int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses)
                 else
                         rc = -EHOSTDOWN;
                 spin_unlock(&GlobalMid_Lock);
-
         }
 
         return rc;
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index b4219789049a..3ba3f3cd2397 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -898,7 +898,7 @@ ssetup_ntlmssp_authenticate:
         if (action & GUEST_LOGIN)
                 cFYI(1, "Guest login"); /* BB mark SesInfo struct? */
         ses->Suid = smb_buf->Uid;   /* UID left in wire format (le) */
-        cFYI(1, "UID = %d ", ses->Suid);
+        cFYI(1, "UID = %llu ", ses->Suid);
         /* response can have either 3 or 4 word count - Samba sends 3 */
         /* and lanman response is 3 */
         bytes_remaining = get_bcc(smb_buf);
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index f4f839459e90..ea4fb8aaaafb 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -389,6 +389,27 @@ cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
         return true;
 }
 
+static bool
+cifs_need_neg(struct TCP_Server_Info *server)
+{
+        return server->maxBuf == 0;
+}
+
+static int
+cifs_negotiate(const unsigned int xid, struct cifs_ses *ses)
+{
+        int rc;
+        rc = CIFSSMBNegotiate(xid, ses);
+        if (rc == -EAGAIN) {
+                /* retry only once on 1st time connection */
+                set_credits(ses->server, 1);
+                rc = CIFSSMBNegotiate(xid, ses);
+                if (rc == -EAGAIN)
+                        rc = -EHOSTDOWN;
+        }
+        return rc;
+}
+
 struct smb_version_operations smb1_operations = {
         .send_cancel = send_nt_cancel,
         .compare_fids = cifs_compare_fids,
@@ -407,6 +428,8 @@ struct smb_version_operations smb1_operations = {
         .dump_detail = cifs_dump_detail,
         .is_oplock_break = is_valid_oplock_break,
         .check_trans2 = cifs_check_trans2,
+        .need_neg = cifs_need_neg,
+        .negotiate = cifs_negotiate,
 };
 
 struct smb_version_values smb1_values = {