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Commit ba749e6d authored by Jeff Layton's avatar Jeff Layton Committed by Steve French
Browse files

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: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarSteve French <smfrench@gmail.com>
parent e831e6cf

fs/cifs/connect.c

+22 −11
Original line number Diff line number Diff line
@@ -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)