Root/
1 | /* |
2 | * Copyright (c) 2006 Oracle. All rights reserved. |
3 | * |
4 | * This software is available to you under a choice of one of two |
5 | * licenses. You may choose to be licensed under the terms of the GNU |
6 | * General Public License (GPL) Version 2, available from the file |
7 | * COPYING in the main directory of this source tree, or the |
8 | * OpenIB.org BSD license below: |
9 | * |
10 | * Redistribution and use in source and binary forms, with or |
11 | * without modification, are permitted provided that the following |
12 | * conditions are met: |
13 | * |
14 | * - Redistributions of source code must retain the above |
15 | * copyright notice, this list of conditions and the following |
16 | * disclaimer. |
17 | * |
18 | * - Redistributions in binary form must reproduce the above |
19 | * copyright notice, this list of conditions and the following |
20 | * disclaimer in the documentation and/or other materials |
21 | * provided with the distribution. |
22 | * |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
30 | * SOFTWARE. |
31 | * |
32 | */ |
33 | #include <linux/kernel.h> |
34 | #include <linux/in.h> |
35 | #include <net/tcp.h> |
36 | |
37 | #include "rds.h" |
38 | #include "tcp.h" |
39 | |
40 | void rds_tcp_state_change(struct sock *sk) |
41 | { |
42 | void (*state_change)(struct sock *sk); |
43 | struct rds_connection *conn; |
44 | struct rds_tcp_connection *tc; |
45 | |
46 | read_lock(&sk->sk_callback_lock); |
47 | conn = sk->sk_user_data; |
48 | if (conn == NULL) { |
49 | state_change = sk->sk_state_change; |
50 | goto out; |
51 | } |
52 | tc = conn->c_transport_data; |
53 | state_change = tc->t_orig_state_change; |
54 | |
55 | rdsdebug("sock %p state_change to %d\n", tc->t_sock, sk->sk_state); |
56 | |
57 | switch(sk->sk_state) { |
58 | /* ignore connecting sockets as they make progress */ |
59 | case TCP_SYN_SENT: |
60 | case TCP_SYN_RECV: |
61 | break; |
62 | case TCP_ESTABLISHED: |
63 | rds_connect_complete(conn); |
64 | break; |
65 | case TCP_CLOSE: |
66 | rds_conn_drop(conn); |
67 | default: |
68 | break; |
69 | } |
70 | out: |
71 | read_unlock(&sk->sk_callback_lock); |
72 | state_change(sk); |
73 | } |
74 | |
75 | int rds_tcp_conn_connect(struct rds_connection *conn) |
76 | { |
77 | struct socket *sock = NULL; |
78 | struct sockaddr_in src, dest; |
79 | int ret; |
80 | |
81 | ret = sock_create(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock); |
82 | if (ret < 0) |
83 | goto out; |
84 | |
85 | rds_tcp_tune(sock); |
86 | |
87 | src.sin_family = AF_INET; |
88 | src.sin_addr.s_addr = (__force u32)conn->c_laddr; |
89 | src.sin_port = (__force u16)htons(0); |
90 | |
91 | ret = sock->ops->bind(sock, (struct sockaddr *)&src, sizeof(src)); |
92 | if (ret) { |
93 | rdsdebug("bind failed with %d at address %u.%u.%u.%u\n", |
94 | ret, NIPQUAD(conn->c_laddr)); |
95 | goto out; |
96 | } |
97 | |
98 | dest.sin_family = AF_INET; |
99 | dest.sin_addr.s_addr = (__force u32)conn->c_faddr; |
100 | dest.sin_port = (__force u16)htons(RDS_TCP_PORT); |
101 | |
102 | /* |
103 | * once we call connect() we can start getting callbacks and they |
104 | * own the socket |
105 | */ |
106 | rds_tcp_set_callbacks(sock, conn); |
107 | ret = sock->ops->connect(sock, (struct sockaddr *)&dest, sizeof(dest), |
108 | O_NONBLOCK); |
109 | sock = NULL; |
110 | |
111 | rdsdebug("connect to address %u.%u.%u.%u returned %d\n", |
112 | NIPQUAD(conn->c_faddr), ret); |
113 | if (ret == -EINPROGRESS) |
114 | ret = 0; |
115 | |
116 | out: |
117 | if (sock) |
118 | sock_release(sock); |
119 | return ret; |
120 | } |
121 | |
122 | /* |
123 | * Before killing the tcp socket this needs to serialize with callbacks. The |
124 | * caller has already grabbed the sending sem so we're serialized with other |
125 | * senders. |
126 | * |
127 | * TCP calls the callbacks with the sock lock so we hold it while we reset the |
128 | * callbacks to those set by TCP. Our callbacks won't execute again once we |
129 | * hold the sock lock. |
130 | */ |
131 | void rds_tcp_conn_shutdown(struct rds_connection *conn) |
132 | { |
133 | struct rds_tcp_connection *tc = conn->c_transport_data; |
134 | struct socket *sock = tc->t_sock; |
135 | |
136 | rdsdebug("shutting down conn %p tc %p sock %p\n", conn, tc, sock); |
137 | |
138 | if (sock) { |
139 | sock->ops->shutdown(sock, RCV_SHUTDOWN | SEND_SHUTDOWN); |
140 | lock_sock(sock->sk); |
141 | rds_tcp_restore_callbacks(sock, tc); /* tc->tc_sock = NULL */ |
142 | |
143 | release_sock(sock->sk); |
144 | sock_release(sock); |
145 | }; |
146 | |
147 | if (tc->t_tinc) { |
148 | rds_inc_put(&tc->t_tinc->ti_inc); |
149 | tc->t_tinc = NULL; |
150 | } |
151 | tc->t_tinc_hdr_rem = sizeof(struct rds_header); |
152 | tc->t_tinc_data_rem = 0; |
153 | } |
154 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9