2 * Copyright (c) 2006 Oracle. All rights reserved.
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6 * General Public License (GPL) Version 2, available from the file
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8 * OpenIB.org BSD license below:
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15 * copyright notice, this list of conditions and the following
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21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/kernel.h>
37 #include "rds_single_path.h"
41 void rds_tcp_state_change(struct sock *sk)
43 void (*state_change)(struct sock *sk);
44 struct rds_conn_path *cp;
45 struct rds_tcp_connection *tc;
47 read_lock_bh(&sk->sk_callback_lock);
48 cp = sk->sk_user_data;
50 state_change = sk->sk_state_change;
53 tc = cp->cp_transport_data;
54 state_change = tc->t_orig_state_change;
56 rdsdebug("sock %p state_change to %d\n", tc->t_sock, sk->sk_state);
58 switch (sk->sk_state) {
59 /* ignore connecting sockets as they make progress */
64 rds_connect_path_complete(cp, RDS_CONN_CONNECTING);
68 rds_conn_path_drop(cp);
73 read_unlock_bh(&sk->sk_callback_lock);
77 int rds_tcp_conn_path_connect(struct rds_conn_path *cp)
79 struct socket *sock = NULL;
80 struct sockaddr_in src, dest;
82 struct rds_connection *conn = cp->cp_conn;
83 struct rds_tcp_connection *tc = cp->cp_transport_data;
85 mutex_lock(&tc->t_conn_path_lock);
87 if (rds_conn_path_up(cp)) {
88 mutex_unlock(&tc->t_conn_path_lock);
91 ret = sock_create_kern(rds_conn_net(conn), PF_INET,
92 SOCK_STREAM, IPPROTO_TCP, &sock);
98 src.sin_family = AF_INET;
99 src.sin_addr.s_addr = (__force u32)conn->c_laddr;
100 src.sin_port = (__force u16)htons(0);
102 ret = sock->ops->bind(sock, (struct sockaddr *)&src, sizeof(src));
104 rdsdebug("bind failed with %d at address %pI4\n",
105 ret, &conn->c_laddr);
109 dest.sin_family = AF_INET;
110 dest.sin_addr.s_addr = (__force u32)conn->c_faddr;
111 dest.sin_port = (__force u16)htons(RDS_TCP_PORT);
114 * once we call connect() we can start getting callbacks and they
117 rds_tcp_set_callbacks(sock, cp);
118 ret = sock->ops->connect(sock, (struct sockaddr *)&dest, sizeof(dest),
122 rdsdebug("connect to address %pI4 returned %d\n", &conn->c_faddr, ret);
123 if (ret == -EINPROGRESS)
126 rds_tcp_keepalive(sock);
129 rds_tcp_restore_callbacks(sock, cp->cp_transport_data);
133 mutex_unlock(&tc->t_conn_path_lock);
140 * Before killing the tcp socket this needs to serialize with callbacks. The
141 * caller has already grabbed the sending sem so we're serialized with other
144 * TCP calls the callbacks with the sock lock so we hold it while we reset the
145 * callbacks to those set by TCP. Our callbacks won't execute again once we
146 * hold the sock lock.
148 void rds_tcp_conn_path_shutdown(struct rds_conn_path *cp)
150 struct rds_tcp_connection *tc = cp->cp_transport_data;
151 struct socket *sock = tc->t_sock;
153 rdsdebug("shutting down conn %p tc %p sock %p\n",
154 cp->cp_conn, tc, sock);
157 sock->ops->shutdown(sock, RCV_SHUTDOWN | SEND_SHUTDOWN);
159 rds_tcp_restore_callbacks(sock, tc); /* tc->tc_sock = NULL */
161 release_sock(sock->sk);
166 rds_inc_put(&tc->t_tinc->ti_inc);
169 tc->t_tinc_hdr_rem = sizeof(struct rds_header);
170 tc->t_tinc_data_rem = 0;