1 files changed, 51 insertions, 20 deletions

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 35ae49ed1f76..777ad9f4fc3c 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -787,6 +787,15 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
 
 	dump_smb(buf, server->total_read);
 
+	return cifs_handle_standard(server, mid);
+}
+
+int
+cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
+{
+	char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
+	int length;
+
 	/*
 	 * We know that we received enough to get to the MID as we
 	 * checked the pdu_length earlier. Now check to see
@@ -872,12 +881,19 @@ cifs_demultiplex_thread(void *p)
 			continue;
 		server->total_read += length;
 
-		mid_entry = server->ops->find_mid(server, buf);
+		if (server->ops->is_transform_hdr &&
+		    server->ops->receive_transform &&
+		    server->ops->is_transform_hdr(buf)) {
+			length = server->ops->receive_transform(server,
+								&mid_entry);
+		} else {
+			mid_entry = server->ops->find_mid(server, buf);
 
-		if (!mid_entry || !mid_entry->receive)
-			length = standard_receive3(server, mid_entry);
-		else
-			length = mid_entry->receive(server, mid_entry);
+			if (!mid_entry || !mid_entry->receive)
+				length = standard_receive3(server, mid_entry);
+			else
+				length = mid_entry->receive(server, mid_entry);
+		}
 
 		if (length < 0)
 			continue;
@@ -2154,7 +2170,7 @@ cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect)
 	server->tcpStatus = CifsExiting;
 	spin_unlock(&GlobalMid_Lock);
 
-	cifs_crypto_shash_release(server);
+	cifs_crypto_secmech_release(server);
 	cifs_fscache_release_client_cookie(server);
 
 	kfree(server->session_key.response);
@@ -2273,7 +2289,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
 	return tcp_ses;
 
 out_err_crypto_release:
-	cifs_crypto_shash_release(tcp_ses);
+	cifs_crypto_secmech_release(tcp_ses);
 
 	put_net(cifs_net_ns(tcp_ses));
 
@@ -2614,12 +2630,18 @@ get_ses_fail:
 	return ERR_PTR(rc);
 }
 
-static int match_tcon(struct cifs_tcon *tcon, const char *unc)
+static int match_tcon(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 {
 	if (tcon->tidStatus == CifsExiting)
 		return 0;
-	if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
+	if (strncmp(tcon->treeName, volume_info->UNC, MAX_TREE_SIZE))
 		return 0;
+	if (tcon->seal != volume_info->seal)
+		return 0;
+#ifdef CONFIG_CIFS_SMB2
+	if (tcon->snapshot_time != volume_info->snapshot_time)
+		return 0;
+#endif /* CONFIG_CIFS_SMB2 */
 	return 1;
 }
 
@@ -2632,14 +2654,8 @@ cifs_find_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
 	spin_lock(&cifs_tcp_ses_lock);
 	list_for_each(tmp, &ses->tcon_list) {
 		tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
-		if (!match_tcon(tcon, volume_info->UNC))
-			continue;
-
-#ifdef CONFIG_CIFS_SMB2
-		if (tcon->snapshot_time != volume_info->snapshot_time)
+		if (!match_tcon(tcon, volume_info))
 			continue;
-#endif /* CONFIG_CIFS_SMB2 */
-
 		++tcon->tc_count;
 		spin_unlock(&cifs_tcp_ses_lock);
 		return tcon;
@@ -2685,8 +2701,6 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
 		cifs_dbg(FYI, "Found match on UNC path\n");
 		/* existing tcon already has a reference */
 		cifs_put_smb_ses(ses);
-		if (tcon->seal != volume_info->seal)
-			cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
 		return tcon;
 	}
 
@@ -2742,7 +2756,6 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
 		tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
 		cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
 	}
-	tcon->seal = volume_info->seal;
 	tcon->use_persistent = false;
 	/* check if SMB2 or later, CIFS does not support persistent handles */
 	if (volume_info->persistent) {
@@ -2779,6 +2792,24 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
 		tcon->use_resilient = true;
 	}
 
+	if (volume_info->seal) {
+		if (ses->server->vals->protocol_id == 0) {
+			cifs_dbg(VFS,
+				 "SMB3 or later required for encryption\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+#ifdef CONFIG_CIFS_SMB2
+		} else if (tcon->ses->server->capabilities &
+					SMB2_GLOBAL_CAP_ENCRYPTION)
+			tcon->seal = true;
+		else {
+			cifs_dbg(VFS, "Encryption is not supported on share\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+#endif /* CONFIG_CIFS_SMB2 */
+		}
+	}
+
 	/*
 	 * We can have only one retry value for a connection to a share so for
 	 * resources mounted more than once to the same server share the last
@@ -2910,7 +2941,7 @@ cifs_match_super(struct super_block *sb, void *data)
 
 	if (!match_server(tcp_srv, volume_info) ||
 	    !match_session(ses, volume_info) ||
-	    !match_tcon(tcon, volume_info->UNC) ||
+	    !match_tcon(tcon, volume_info) ||
 	    !match_prepath(sb, mnt_data)) {
 		rc = 0;
 		goto out;