lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <1206794957-17010-1-git-send-email-jlayton@redhat.com>
Date:	Sat, 29 Mar 2008 08:49:17 -0400
From:	Jeff Layton <jlayton@...hat.com>
To:	linux-nfs@...r.kernel.org, nfsv4@...ux-nfs.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] SUNRPC: have soft RPC tasks return -ETIMEDOUT instead of -EIO on major connect timeout

NFSv4 background mounts do not currently work correctly. While we could
try to fix this in userspace, I think it's really a kernel problem...

When a soft RPC tasks experiences a major timeout during a connection
attempt, it does an rpc_exit with a return code of -EIO. For NFSv4
mounts, this makes the mount() syscall return -EIO. mount.nfs4 then
interprets that as a "permanent" error, and won't attempt a background
mount when bg is specified. Fix this by making call_timeout() do the
rpc_exit() with an error of -ETIMEDOUT.

This fixes the background mount issue, but does make other syscalls
on soft mounts return ETIMEDOUT instead of EIO in this situation.

Comments welcome.

Signed-off-by: Jeff Layton <jlayton@...hat.com>
---
 net/sunrpc/clnt.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 8c6a7f1..b6d409e 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1162,7 +1162,7 @@ call_timeout(struct rpc_task *task)
 	if (RPC_IS_SOFT(task)) {
 		printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
 				clnt->cl_protname, clnt->cl_server);
-		rpc_exit(task, -EIO);
+		rpc_exit(task, -ETIMEDOUT);
 		return;
 	}
 
-- 
1.5.3.6

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ