From 4876cc779ff525b9c2376d8076edf47815e71f2c Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Fri, 19 Jun 2015 16:17:57 -0400 Subject: SUNRPC: Ensure we release the TCP socket once it has been closed This fixes a regression introduced by commit caf4ccd4e88cf2 ("SUNRPC: Make xs_tcp_close() do a socket shutdown rather than a sock_release"). Prior to that commit, the autoclose feature would ensure that an idle connection would result in the socket being both disconnected and released, whereas now only gets disconnected. While the current behaviour is harmless, it does leave the port bound until either RPC traffic resumes or the RPC client is shut down. Reported-by: Steven Rostedt Signed-off-by: Trond Myklebust --- net/sunrpc/xprt.c | 2 +- net/sunrpc/xprtsock.c | 40 ++++++++++++++++++++++------------------ 2 files changed, 23 insertions(+), 19 deletions(-) (limited to 'net') diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 3ca31f20b97c..ab5dd621ae0c 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -611,8 +611,8 @@ static void xprt_autoclose(struct work_struct *work) struct rpc_xprt *xprt = container_of(work, struct rpc_xprt, task_cleanup); - xprt->ops->close(xprt); clear_bit(XPRT_CLOSE_WAIT, &xprt->state); + xprt->ops->close(xprt); xprt_release_write(xprt, NULL); } diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index fda8ec8c74c0..ee0715dfc3c7 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -622,24 +622,6 @@ process_status: return status; } -/** - * xs_tcp_shutdown - gracefully shut down a TCP socket - * @xprt: transport - * - * Initiates a graceful shutdown of the TCP socket by calling the - * equivalent of shutdown(SHUT_RDWR); - */ -static void xs_tcp_shutdown(struct rpc_xprt *xprt) -{ - struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); - struct socket *sock = transport->sock; - - if (sock != NULL) { - kernel_sock_shutdown(sock, SHUT_RDWR); - trace_rpc_socket_shutdown(xprt, sock); - } -} - /** * xs_tcp_send_request - write an RPC request to a TCP socket * @task: address of RPC task that manages the state of an RPC request @@ -786,6 +768,7 @@ static void xs_sock_mark_closed(struct rpc_xprt *xprt) xs_sock_reset_connection_flags(xprt); /* Mark transport as closed and wake up all pending tasks */ xprt_disconnect_done(xprt); + xprt_force_disconnect(xprt); } /** @@ -2103,6 +2086,27 @@ out: xprt_wake_pending_tasks(xprt, status); } +/** + * xs_tcp_shutdown - gracefully shut down a TCP socket + * @xprt: transport + * + * Initiates a graceful shutdown of the TCP socket by calling the + * equivalent of shutdown(SHUT_RDWR); + */ +static void xs_tcp_shutdown(struct rpc_xprt *xprt) +{ + struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); + struct socket *sock = transport->sock; + + if (sock == NULL) + return; + if (xprt_connected(xprt)) { + kernel_sock_shutdown(sock, SHUT_RDWR); + trace_rpc_socket_shutdown(xprt, sock); + } else + xs_reset_transport(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); -- cgit v1.2.3