Keep nfsd from exiting when seeing recv() errors

I think I submitted this one previously - svc_tcp_recvfrom currently returns any errors to the caller, including ECONNRESET and the like.

This is something svc_recv isn't able to deal with:

	len = svsk->sk_recvfrom(rqstp);
	[...]
	if (len == 0 || len == -EAGAIN) {
		[...]
		return -EAGAIN;
	}

	[...]
	return len;

The nfsd main loop will exit when it sees an error code other than EAGAIN.

The attached patch fixes this problem.

Olaf

Olaf Kirch   |  --- o --- Nous sommes du soleil we love when we play
[email protected] |    / | \   sol.dhoop.naytheet.ah kin.ir.samse.qurax

Subject: Keep nfsd from exiting when seeing recv() errors
From: Olaf Kirch <[email protected]>

svc_recv is not equipped to deal with error codes other than EAGAIN, and will propagate anything else (such as ECONNRESET) up to nfsd, causing it to exit.

Index: 2.4.21/net/sunrpc/svcsock.c
===================================================================
@@ -894,7 +894,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
 	} else {
 		printk(KERN_NOTICE "%s: recvfrom returned errno %d\n",
 					svsk->sk_server->sv_name, -len);
-		svc_sock_received(svsk);
+		goto err_delete;
 	}
 
 	return len;