cifs: check for unresponsive server every time we call kernel_recvmsg

If the server stops sending data while in the middle of sending a
response then we still want to reconnect it if it doesn't come back.

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

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index ed969fd..abbc6c3 100644 (file)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -358,6 +358,23 @@ allocate_buffers(char **bigbuf, char **smallbuf, unsigned int size,
        return true;
 }
 
+static bool
+server_unresponsive(struct TCP_Server_Info *server)
+{
+       if (echo_retries > 0 && server->tcpStatus == CifsGood &&
+           time_after(jiffies, server->lstrp +
+                               (echo_retries * SMB_ECHO_INTERVAL))) {
+               cERROR(1, "Server %s has not responded in %d seconds. "
+                         "Reconnecting...", server->hostname,
+                         (echo_retries * SMB_ECHO_INTERVAL / HZ));
+               cifs_reconnect(server);
+               wake_up(&server->response_q);
+               return true;
+       }
+
+       return false;
+}
+
 static int
 read_from_socket(struct TCP_Server_Info *server,
                 struct kvec *iov, unsigned int to_read,
@@ -372,6 +389,11 @@ read_from_socket(struct TCP_Server_Info *server,
        smb_msg.msg_controllen = 0;
 
        for (total_read = 0; total_read < to_read; total_read += length) {
+               if (server_unresponsive(server)) {
+                       rc = 1;
+                       break;
+               }
+
                length = kernel_recvmsg(server->ssocket, &smb_msg, iov, 1,
                                        to_read - total_read, 0);
                if (server->tcpStatus == CifsExiting) {
@@ -669,17 +691,6 @@ cifs_demultiplex_thread(void *p)
                pdu_length = 4; /* enough to get RFC1001 header */
 
 incomplete_rcv:
-               if (echo_retries > 0 && server->tcpStatus == CifsGood &&
-                   time_after(jiffies, server->lstrp +
-                                       (echo_retries * SMB_ECHO_INTERVAL))) {
-                       cERROR(1, "Server %s has not responded in %d seconds. "
-                                 "Reconnecting...", server->hostname,
-                                 (echo_retries * SMB_ECHO_INTERVAL / HZ));
-                       cifs_reconnect(server);
-                       wake_up(&server->response_q);
-                       continue;
-               }
-
                rc = read_from_socket(server, &iov, pdu_length,
                                      &total_read, true /* header read */);
                if (rc == 3)