1 files changed, 45 insertions, 24 deletions

diff --git a/fs/smb/client/connect.c b/fs/smb/client/connect.c
index 28bc33496623..685c65dcb8c4 100644
--- a/fs/smb/client/connect.c
+++ b/fs/smb/client/connect.c
@@ -124,6 +124,14 @@ static void smb2_query_server_interfaces(struct work_struct *work)
 			   (SMB_INTERFACE_POLL_INTERVAL * HZ));
 }
 
+#define set_need_reco(server) \
+do { \
+	spin_lock(&server->srv_lock); \
+	if (server->tcpStatus != CifsExiting) \
+		server->tcpStatus = CifsNeedReconnect; \
+	spin_unlock(&server->srv_lock); \
+} while (0)
+
 /*
  * Update the tcpStatus for the server.
  * This is used to signal the cifsd thread to call cifs_reconnect
@@ -137,39 +145,45 @@ void
 cifs_signal_cifsd_for_reconnect(struct TCP_Server_Info *server,
 				bool all_channels)
 {
-	struct TCP_Server_Info *pserver;
+	struct TCP_Server_Info *nserver;
 	struct cifs_ses *ses;
+	LIST_HEAD(reco);
 	int i;
 
-	/* If server is a channel, select the primary channel */
-	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
-
 	/* if we need to signal just this channel */
 	if (!all_channels) {
-		spin_lock(&server->srv_lock);
-		if (server->tcpStatus != CifsExiting)
-			server->tcpStatus = CifsNeedReconnect;
-		spin_unlock(&server->srv_lock);
+		set_need_reco(server);
 		return;
 	}
 
-	spin_lock(&cifs_tcp_ses_lock);
-	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
-		if (cifs_ses_exiting(ses))
-			continue;
-		spin_lock(&ses->chan_lock);
-		for (i = 0; i < ses->chan_count; i++) {
-			if (!ses->chans[i].server)
+	if (SERVER_IS_CHAN(server))
+		server = server->primary_server;
+	scoped_guard(spinlock, &cifs_tcp_ses_lock) {
+		set_need_reco(server);
+		list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+			spin_lock(&ses->ses_lock);
+			if (ses->ses_status == SES_EXITING) {
+				spin_unlock(&ses->ses_lock);
 				continue;
-
-			spin_lock(&ses->chans[i].server->srv_lock);
-			if (ses->chans[i].server->tcpStatus != CifsExiting)
-				ses->chans[i].server->tcpStatus = CifsNeedReconnect;
-			spin_unlock(&ses->chans[i].server->srv_lock);
+			}
+			spin_lock(&ses->chan_lock);
+			for (i = 1; i < ses->chan_count; i++) {
+				nserver = ses->chans[i].server;
+				if (!nserver)
+					continue;
+				nserver->srv_count++;
+				list_add(&nserver->rlist, &reco);
+			}
+			spin_unlock(&ses->chan_lock);
+			spin_unlock(&ses->ses_lock);
 		}
-		spin_unlock(&ses->chan_lock);
 	}
-	spin_unlock(&cifs_tcp_ses_lock);
+
+	list_for_each_entry_safe(server, nserver, &reco, rlist) {
+		list_del_init(&server->rlist);
+		set_need_reco(server);
+		cifs_put_tcp_session(server, 0);
+	}
 }
 
 /*
@@ -3718,9 +3732,15 @@ int cifs_mount_get_tcon(struct cifs_mount_ctx *mnt_ctx)
 		goto out;
 	}
 
-	/* if new SMB3.11 POSIX extensions are supported do not remap / and \ */
-	if (tcon->posix_extensions)
+	/*
+	 * if new SMB3.11 POSIX extensions are supported, do not change anything in the
+	 * path (i.e., do not remap / and \ and do not map any special characters)
+	 */
+	if (tcon->posix_extensions) {
 		cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS;
+		cifs_sb->mnt_cifs_flags &= ~(CIFS_MOUNT_MAP_SFM_CHR |
+					     CIFS_MOUNT_MAP_SPECIAL_CHR);
+	}
 
 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
 	/* tell server which Unix caps we support */
@@ -4193,6 +4213,7 @@ retry:
 		return 0;
 	}
 
+	server->lstrp = jiffies;
 	server->tcpStatus = CifsInNegotiate;
 	spin_unlock(&server->srv_lock);