/* * Copyright (c) 2006 Oracle. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * */ #include #include #include #include #include #include "rds.h" #include "tcp.h" /* only for info exporting */ static DEFINE_SPINLOCK(rds_tcp_tc_list_lock); static LIST_HEAD(rds_tcp_tc_list); static unsigned int rds_tcp_tc_count; /* Track rds_tcp_connection structs so they can be cleaned up */ static DEFINE_SPINLOCK(rds_tcp_conn_lock); static LIST_HEAD(rds_tcp_conn_list); static struct kmem_cache *rds_tcp_conn_slab; #define RDS_TCP_DEFAULT_BUFSIZE (128 * 1024) /* doing it this way avoids calling tcp_sk() */ void rds_tcp_nonagle(struct socket *sock) { mm_segment_t oldfs = get_fs(); int val = 1; set_fs(KERNEL_DS); sock->ops->setsockopt(sock, SOL_TCP, TCP_NODELAY, (char __user *)&val, sizeof(val)); set_fs(oldfs); } void rds_tcp_tune(struct socket *sock) { struct sock *sk = sock->sk; rds_tcp_nonagle(sock); /* * We're trying to saturate gigabit with the default, * see svc_sock_setbufsize(). */ lock_sock(sk); sk->sk_sndbuf = RDS_TCP_DEFAULT_BUFSIZE; sk->sk_rcvbuf = RDS_TCP_DEFAULT_BUFSIZE; sk->sk_userlocks |= SOCK_SNDBUF_LOCK|SOCK_RCVBUF_LOCK; release_sock(sk); } u32 rds_tcp_snd_nxt(struct rds_tcp_connection *tc) { return tcp_sk(tc->t_sock->sk)->snd_nxt; } u32 rds_tcp_snd_una(struct rds_tcp_connection *tc) { return tcp_sk(tc->t_sock->sk)->snd_una; } void rds_tcp_restore_callbacks(struct socket *sock, struct rds_tcp_connection *tc) { rdsdebug("restoring sock %p callbacks from tc %p\n", sock, tc); write_lock_bh(&sock->sk->sk_callback_lock); /* done under the callback_lock to serialize with write_space */ spin_lock(&rds_tcp_tc_list_lock); list_del_init(&tc->t_list_item); rds_tcp_tc_count--; spin_unlock(&rds_tcp_tc_list_lock); tc->t_sock = NULL; sock->sk->sk_write_space = tc->t_orig_write_space; sock->sk->sk_data_ready = tc->t_orig_data_ready; sock->sk->sk_state_change = tc->t_orig_state_change; sock->sk->sk_user_data = NULL; write_unlock_bh(&sock->sk->sk_callback_lock); } /* * This is the only path that sets tc->t_sock. Send and receive trust that * it is set. The RDS_CONN_CONNECTED bit protects those paths from being * called while it isn't set. */ void rds_tcp_set_callbacks(struct socket *sock, struct rds_connection *conn) { struct rds_tcp_connection *tc = conn->c_transport_data; rdsdebug("setting sock %p callbacks to tc %p\n", sock, tc); write_lock_bh(&sock->sk->sk_callback_lock); /* done under the callback_lock to serialize with write_space */ spin_lock(&rds_tcp_tc_list_lock); list_add_tail(&tc->t_list_item, &rds_tcp_tc_list); rds_tcp_tc_count++; spin_unlock(&rds_tcp_tc_list_lock); /* accepted sockets need our listen data ready undone */ if (sock->sk->sk_data_ready == rds_tcp_listen_data_ready) sock->sk->sk_data_ready = sock->sk->sk_user_data; tc->t_sock = sock; tc->conn = conn; tc->t_orig_data_ready = sock->sk->sk_data_ready; tc->t_orig_write_space = sock->sk->sk_write_space; tc->t_orig_state_change = sock->sk->sk_state_change; sock->sk->sk_user_data = conn; sock->sk->sk_data_ready = rds_tcp_data_ready; sock->sk->sk_write_space = rds_tcp_write_space; sock->sk->sk_state_change = rds_tcp_state_change; write_unlock_bh(&sock->sk->sk_callback_lock); } static void rds_tcp_tc_info(struct socket *sock, unsigned int len, struct rds_info_iterator *iter, struct rds_info_lengths *lens) { struct rds_info_tcp_socket tsinfo; struct rds_tcp_connection *tc; unsigned long flags; struct sockaddr_in sin; int sinlen; spin_lock_irqsave(&rds_tcp_tc_list_lock, flags); if (len / sizeof(tsinfo) < rds_tcp_tc_count) goto out; list_for_each_entry(tc, &rds_tcp_tc_list, t_list_item) { sock->ops->getname(sock, (struct sockaddr *)&sin, &sinlen, 0); tsinfo.local_addr = sin.sin_addr.s_addr; tsinfo.local_port = sin.sin_port; sock->ops->getname(sock, (struct sockaddr *)&sin, &sinlen, 1); tsinfo.peer_addr = sin.sin_addr.s_addr; tsinfo.peer_port = sin.sin_port; tsinfo.hdr_rem = tc->t_tinc_hdr_rem; tsinfo.data_rem = tc->t_tinc_data_rem; tsinfo.last_sent_nxt = tc->t_last_sent_nxt; tsinfo.last_expected_una = tc->t_last_expected_una; tsinfo.last_seen_una = tc->t_last_seen_una; rds_info_copy(iter, &tsinfo, sizeof(tsinfo)); }