diff options
author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-02-08 23:34:28 +0300 |
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committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-02-09 05:47:30 +0300 |
commit | 4efdd92c921135175a85452cd41273d9e2788db3 (patch) | |
tree | 93f7a3e5c6a3fe628df46eb776a35ead8b56e515 /net | |
parent | de84d89030fa4efa44c02c96c8b4a8176042c4ff (diff) | |
download | linux-4efdd92c921135175a85452cd41273d9e2788db3.tar.xz |
SUNRPC: Remove TCP client connection reset hack
Instead we rely on SO_REUSEPORT to provide the reconnection semantics
that we need for NFSv2/v3.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'net')
-rw-r--r-- | net/sunrpc/xprtsock.c | 67 |
1 files changed, 1 insertions, 66 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index e53a5ca03daf..dbf279cd4494 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -796,8 +796,6 @@ static void xs_error_report(struct sock *sk) dprintk("RPC: xs_error_report client %p, error=%d...\n", xprt, -err); trace_rpc_socket_error(xprt, sk->sk_socket, err); - if (test_bit(XPRT_CONNECTION_REUSE, &xprt->state)) - goto out; xprt_wake_pending_tasks(xprt, err); out: read_unlock_bh(&sk->sk_callback_lock); @@ -2102,57 +2100,6 @@ out: xprt_wake_pending_tasks(xprt, status); } -/* - * We need to preserve the port number so the reply cache on the server can - * find our cached RPC replies when we get around to reconnecting. - */ -static void xs_abort_connection(struct sock_xprt *transport) -{ - int result; - struct sockaddr any; - - dprintk("RPC: disconnecting xprt %p to reuse port\n", transport); - - /* - * Disconnect the transport socket by doing a connect operation - * with AF_UNSPEC. This should return immediately... - */ - memset(&any, 0, sizeof(any)); - any.sa_family = AF_UNSPEC; - result = kernel_connect(transport->sock, &any, sizeof(any), 0); - trace_rpc_socket_reset_connection(&transport->xprt, - transport->sock, result); - if (!result) - xs_sock_reset_connection_flags(&transport->xprt); - dprintk("RPC: AF_UNSPEC connect return code %d\n", result); -} - -static void xs_tcp_reuse_connection(struct sock_xprt *transport) -{ - unsigned int state = transport->inet->sk_state; - - if (state == TCP_CLOSE && transport->sock->state == SS_UNCONNECTED) { - /* we don't need to abort the connection if the socket - * hasn't undergone a shutdown - */ - if (transport->inet->sk_shutdown == 0) - return; - dprintk("RPC: %s: TCP_CLOSEd and sk_shutdown set to %d\n", - __func__, transport->inet->sk_shutdown); - } - if ((1 << state) & (TCPF_ESTABLISHED|TCPF_SYN_SENT)) { - /* we don't need to abort the connection if the socket - * hasn't undergone a shutdown - */ - if (transport->inet->sk_shutdown == 0) - return; - dprintk("RPC: %s: ESTABLISHED/SYN_SENT " - "sk_shutdown set to %d\n", - __func__, transport->inet->sk_shutdown); - } - xs_abort_connection(transport); -} - static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) { struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); @@ -2245,18 +2192,6 @@ static void xs_tcp_setup_socket(struct work_struct *work) status = PTR_ERR(sock); goto out; } - } else { - int abort_and_exit; - - abort_and_exit = test_and_clear_bit(XPRT_CONNECTION_ABORT, - &xprt->state); - /* "close" the socket, preserving the local port */ - set_bit(XPRT_CONNECTION_REUSE, &xprt->state); - xs_tcp_reuse_connection(transport); - clear_bit(XPRT_CONNECTION_REUSE, &xprt->state); - - if (abort_and_exit) - goto out_eagain; } dprintk("RPC: worker connecting xprt %p via %s to " @@ -2296,9 +2231,9 @@ static void xs_tcp_setup_socket(struct work_struct *work) case -EADDRINUSE: case -ENOBUFS: /* retry with existing socket, after a delay */ + xs_tcp_force_close(xprt); goto out; } -out_eagain: status = -EAGAIN; out: xprt_unlock_connect(xprt, transport); |