Add SMB3.02 dialect support

The new Windows update supports SMB3.02 dialect, a minor update to SMB3.
This patch adds support for mounting with vers=3.02

Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>

5 files changed, 30 insertions, 0 deletions

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index c3162c2f9550..f13cbbeaf098 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -175,6 +175,7 @@ enum smb_version {
         Smb_20,
         Smb_21,
         Smb_30,
+        Smb_302,
 };
 
 struct mid_q_entry;
@@ -1486,4 +1487,7 @@ extern struct smb_version_values smb21_values;
 #define SMB30_VERSION_STRING    "3.0"
 extern struct smb_version_operations smb30_operations;
 extern struct smb_version_values smb30_values;
+#define SMB302_VERSION_STRING   "3.02"
+/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
+extern struct smb_version_values smb302_values;
 #endif  /* _CIFS_GLOB_H */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index c4c6aa99ee1c..d5f866afe560 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -276,6 +276,7 @@ static const match_table_t cifs_smb_version_tokens = {
         { Smb_20, SMB20_VERSION_STRING},
         { Smb_21, SMB21_VERSION_STRING },
         { Smb_30, SMB30_VERSION_STRING },
+        { Smb_302, SMB302_VERSION_STRING },
 };
 
 static int ip_connect(struct TCP_Server_Info *server);
@@ -1124,6 +1125,10 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
                 vol->ops = &smb30_operations;
                 vol->vals = &smb30_values;
                 break;
+        case Smb_302:
+                vol->ops = &smb30_operations; /* currently identical with 3.0 */
+                vol->vals = &smb302_values;
+                break;
 #endif
         default:
                 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index f2e76f3b0c61..14539c71e6e6 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -746,3 +746,21 @@ struct smb_version_values smb30_values = {
         .cap_large_files = SMB2_LARGE_FILES,
         .oplock_read = SMB2_OPLOCK_LEVEL_II,
 };
+
+struct smb_version_values smb302_values = {
+        .version_string = SMB302_VERSION_STRING,
+        .protocol_id = SMB302_PROT_ID,
+        .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
+        .large_lock_type = 0,
+        .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
+        .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
+        .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
+        .header_size = sizeof(struct smb2_hdr),
+        .max_header_size = MAX_SMB2_HDR_SIZE,
+        .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
+        .lock_cmd = SMB2_LOCK,
+        .cap_unix = 0,
+        .cap_nt_find = SMB2_NT_FIND,
+        .cap_large_files = SMB2_LARGE_FILES,
+        .oplock_read = SMB2_OPLOCK_LEVEL_II,
+};
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index a20a8a7e1470..cb155bfb3411 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -386,6 +386,8 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
                 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
         else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
                 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");
         else {
                 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
                          le16_to_cpu(rsp->DialectRevision));
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 4cb4ced258cb..3da33da8123c 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -170,6 +170,7 @@ struct smb2_negotiate_req {
 #define SMB20_PROT_ID 0x0202
 #define SMB21_PROT_ID 0x0210
 #define SMB30_PROT_ID 0x0300
+#define SMB302_PROT_ID 0x0302
 #define BAD_PROT_ID   0xFFFF
 
 /* SecurityMode flags */