From 00326ed6442c66021cd4b5e19e80f3e2027d5d42 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 5 Aug 2013 14:10:43 -0400 Subject: [PATCH v2 1/2] SUNRPC: Don't auto-disconnect from the local rpcbind socket There is no need for the kernel to time out the AF_LOCAL connection to the rpcbind socket, and doing so is problematic because when it is time to reconnect, our process may no longer be using the same mount namespace. Reported-by: Nix Signed-off-by: Trond Myklebust Cc: Jeff Layton Cc: stable@vger.kernel.org # 3.9.x --- net/sunrpc/rpcb_clnt.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c index 3df764d..b0f7232 100644 --- a/net/sunrpc/rpcb_clnt.c +++ b/net/sunrpc/rpcb_clnt.c @@ -238,6 +238,14 @@ static int rpcb_create_local_unix(struct net *net) .program = &rpcb_program, .version = RPCBVERS_2, .authflavor = RPC_AUTH_NULL, + /* + * We turn off the idle timeout to prevent the kernel + * from automatically disconnecting the socket. + * Otherwise, we'd have to cache the mount namespace + * of the caller and somehow pass that to the socket + * reconnect code. + */ + .flags = RPC_CLNT_CREATE_NO_IDLE_TIMEOUT, }; struct rpc_clnt *clnt, *clnt4; int result = 0; -- 1.8.3.1