cifs: mark sessions for reconnection in helper function

BugLink: https://bugs.launchpad.net/bugs/2036450

Today we have the code to mark connections and sessions
(and tcons) for reconnect clubbed with the code to close
the socket and abort all mids in the same function.

Sometimes, we need to mark connections and sessions
outside cifsd thread. So as a part of this change, I'm
splitting this function into two different functions and
calling them one after the other in cifs_reconnect.

Signed-off-by: Shyam Prasad N <[email protected]>
Signed-off-by: Steve French <[email protected]>
(cherry picked from commit 2a05137)
Signed-off-by: Tim Gardner <[email protected]>

Author: sprasad-microsoft

fs/cifs/connect.c

@@ -175,11 +175,6 @@ cifs_mark_tcp_ses_conns_for_reconnect(struct TCP_Server_Info *server,
 	struct TCP_Server_Info *pserver;
 	struct cifs_ses *ses;
 	struct cifs_tcon *tcon;
-	struct mid_q_entry *mid, *nmid;
-	struct list_head retry_list;
-
-	server->maxBuf = 0;
-	server->max_read = 0;
 
 	/*
 	 * before reconnecting the tcp session, mark the smb session (uid) and the tid bad so they
@@ -219,6 +214,16 @@ cifs_mark_tcp_ses_conns_for_reconnect(struct TCP_Server_Info *server,
 		spin_unlock(&ses->chan_lock);
 	}
 	spin_unlock(&cifs_tcp_ses_lock);
+}
+
+static void
+cifs_abort_connection(struct TCP_Server_Info *server)
+{
+	struct mid_q_entry *mid, *nmid;
+	struct list_head retry_list;
+
+	server->maxBuf = 0;
+	server->max_read = 0;
 
 	/* do not want to be sending data on a socket we are freeing */
 	cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
@@ -310,6 +315,8 @@ static int __cifs_reconnect(struct TCP_Server_Info *server,
 
 	cifs_mark_tcp_ses_conns_for_reconnect(server, mark_smb_session);
 
+	cifs_abort_connection(server);
+
 	do {
 		try_to_freeze();
 		mutex_lock(&server->srv_mutex);
@@ -434,6 +441,8 @@ reconnect_dfs_server(struct TCP_Server_Info *server,
 
 	cifs_mark_tcp_ses_conns_for_reconnect(server, mark_smb_session);
 
+	cifs_abort_connection(server);
+
 	do {
 		try_to_freeze();
 		mutex_lock(&server->srv_mutex);