From: Olaf Kirch <okir@suse.de>
Date: Fri, 6 Jan 2006 08:19:56 +0000 (-0800)
Subject: [PATCH] Keep nfsd from exiting when seeing recv() errors
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=93fbf1a5de8afde08988dda3735669099dee84d0;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] Keep nfsd from exiting when seeing recv() errors

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 following patch fixes this problem

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.

Signed-off-by: Olaf Kirch <okir@suse.de>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index d68eba481291..e67613e4eb18 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1026,7 +1026,7 @@ 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;