Merge bk://cifs.bkbits.net/linux-2.5cifs

into stevef95.austin.ibm.com:/home/stevef/bk/linux-2.5cifs

fs/cifs/cifsfs.c

@@ -583,7 +583,7 @@ static int cifs_oplock_thread(void * dummyarg)
 	do {
 		set_current_state(TASK_INTERRUPTIBLE);
 		
-		schedule_timeout(39*HZ);
+		schedule_timeout(1);  
 		spin_lock(&GlobalMid_Lock);
 		if(list_empty(&GlobalOplock_Q)) {
 			spin_unlock(&GlobalMid_Lock);

fs/cifs/cifsglob.h

@@ -274,6 +274,7 @@ struct oplock_q_entry {
 #define   MID_REQUEST_ALLOCATED 1
 #define   MID_REQUEST_SUBMITTED 2
 #define   MID_RESPONSE_RECEIVED 4
+#define   MID_RETRY_NEEDED      8 /* session closed while this request out */
 
 struct servers_not_supported { /* @z4a */
 	struct servers_not_supported *next1;  /* @z4a */

fs/cifs/connect.c

@@ -84,6 +84,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 	struct list_head *tmp;
 	struct cifsSesInfo *ses;
 	struct cifsTconInfo *tcon;
+	struct mid_q_entry * mid_entry;
 	
 	if(server->tcpStatus == CifsExiting)
 		return rc;
@@ -123,6 +124,23 @@ cifs_reconnect(struct TCP_Server_Info *server)
 		server->ssocket = NULL;
 	}
 
+	spin_lock(&GlobalMid_Lock);
+	list_for_each(tmp, &server->pending_mid_q) {
+		mid_entry = list_entry(tmp, struct
+					mid_q_entry,
+					qhead);
+		if(mid_entry) {
+			if(mid_entry->midState == MID_REQUEST_SUBMITTED) {
+				/* Mark other intransit requests as needing retry so 
+				  we do not immediately mark the session bad again 
+				  (ie after we reconnect below) as they timeout too */
+				mid_entry->midState = MID_RETRY_NEEDED;
+			}
+		}
+	}
+	spin_unlock(&GlobalMid_Lock);
+
+
 	while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
 	{
 		rc = ipv4_connect(&server->sockAddr, &server->ssocket);
@@ -193,6 +211,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 		} else if (server->tcpStatus == CifsNeedReconnect) {
 			cFYI(1,("Reconnecting after server stopped responding"));
 			cifs_reconnect(server);
+			cFYI(1,("call to reconnect done"));
 			csocket = server->ssocket;
 			continue;
 		} else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {

fs/cifs/file.c

@@ -222,6 +222,9 @@ static int cifs_reopen_file(struct inode *inode, struct file *file)
         __u16 netfid;
         FILE_ALL_INFO * buf = NULL;
 
+        if(inode == NULL)
+            return -EBADF;
+
         xid = GetXid();
 
         cifs_sb = CIFS_SB(inode->i_sb);

fs/cifs/transport.c

@@ -190,6 +190,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 	long timeout;
 	struct mid_q_entry *midQ;
 
+cifs_dead_ses_retry:
 	midQ = AllocMidQEntry(in_buf, ses);
 	if (midQ == NULL)
 		return -EIO;
@@ -236,8 +237,12 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 			    be32_to_cpu(midQ->resp_buf->smb_buf_length);
 		else {
 			cFYI(1,("No response buffer"));
-			DeleteMidQEntry(midQ);
+			if(midQ->midState != MID_RETRY_NEEDED) {
 				ses->server->tcpStatus = CifsNeedReconnect;
+				DeleteMidQEntry(midQ);
+				goto cifs_dead_ses_retry;
+			}
+			DeleteMidQEntry(midQ);
 			return -EIO;
 		}
 	}