Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
Jon Paul Maloy | 02c00c2 | 2014-06-09 11:08:18 -0500 | [diff] [blame] | 2 | * net/tipc/socket.c: TIPC socket API |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 4 | * Copyright (c) 2001-2007, 2012-2014, Ericsson AB |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 6 | * All rights reserved. |
| 7 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 8 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the names of the copyright holders nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 19 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 20 | * Alternatively, this software may be distributed under the terms of the |
| 21 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 22 | * Software Foundation. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 37 | #include "core.h" |
Allan Stephens | d265fef | 2010-11-30 12:00:53 +0000 | [diff] [blame] | 38 | #include "port.h" |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 39 | #include "name_table.h" |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 40 | #include "node.h" |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 41 | #include "link.h" |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 42 | #include <linux/export.h> |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 43 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 44 | #define SS_LISTENING -1 /* socket is listening */ |
| 45 | #define SS_READY -2 /* socket is connectionless */ |
| 46 | |
Allan Stephens | 3654ea0 | 2008-04-13 21:35:11 -0700 | [diff] [blame] | 47 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 48 | #define TIPC_FWD_MSG 1 |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 49 | |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 50 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 51 | static void tipc_data_ready(struct sock *sk); |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 52 | static void tipc_write_space(struct sock *sk); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 53 | static int tipc_release(struct socket *sock); |
| 54 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 55 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 56 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 57 | static const struct proto_ops packet_ops; |
| 58 | static const struct proto_ops stream_ops; |
| 59 | static const struct proto_ops msg_ops; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 60 | |
| 61 | static struct proto tipc_proto; |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 62 | static struct proto tipc_proto_kern; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 63 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 64 | /* |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 65 | * Revised TIPC socket locking policy: |
| 66 | * |
| 67 | * Most socket operations take the standard socket lock when they start |
| 68 | * and hold it until they finish (or until they need to sleep). Acquiring |
| 69 | * this lock grants the owner exclusive access to the fields of the socket |
| 70 | * data structures, with the exception of the backlog queue. A few socket |
| 71 | * operations can be done without taking the socket lock because they only |
| 72 | * read socket information that never changes during the life of the socket. |
| 73 | * |
| 74 | * Socket operations may acquire the lock for the associated TIPC port if they |
| 75 | * need to perform an operation on the port. If any routine needs to acquire |
| 76 | * both the socket lock and the port lock it must take the socket lock first |
| 77 | * to avoid the risk of deadlock. |
| 78 | * |
| 79 | * The dispatcher handling incoming messages cannot grab the socket lock in |
| 80 | * the standard fashion, since invoked it runs at the BH level and cannot block. |
| 81 | * Instead, it checks to see if the socket lock is currently owned by someone, |
| 82 | * and either handles the message itself or adds it to the socket's backlog |
| 83 | * queue; in the latter case the queued message is processed once the process |
| 84 | * owning the socket lock releases it. |
| 85 | * |
| 86 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes |
| 87 | * the problem of a blocked socket operation preventing any other operations |
| 88 | * from occurring. However, applications must be careful if they have |
| 89 | * multiple threads trying to send (or receive) on the same socket, as these |
| 90 | * operations might interfere with each other. For example, doing a connect |
| 91 | * and a receive at the same time might allow the receive to consume the |
| 92 | * ACK message meant for the connect. While additional work could be done |
| 93 | * to try and overcome this, it doesn't seem to be worthwhile at the present. |
| 94 | * |
| 95 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures |
| 96 | * that another operation that must be performed in a non-blocking manner is |
| 97 | * not delayed for very long because the lock has already been taken. |
| 98 | * |
| 99 | * NOTE: This code assumes that certain fields of a port/socket pair are |
| 100 | * constant over its lifetime; such fields can be examined without taking |
| 101 | * the socket lock and/or port lock, and do not need to be re-read even |
| 102 | * after resuming processing after waiting. These fields include: |
| 103 | * - socket type |
| 104 | * - pointer to socket sk structure (aka tipc_sock structure) |
| 105 | * - pointer to port structure |
| 106 | * - port reference |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 107 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 108 | |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 109 | #include "socket.h" |
| 110 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 111 | /** |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 112 | * advance_rx_queue - discard first buffer in socket receive queue |
| 113 | * |
| 114 | * Caller must hold socket lock |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 115 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 116 | static void advance_rx_queue(struct sock *sk) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 117 | { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 118 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | /** |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 122 | * reject_rx_queue - reject all buffers in socket receive queue |
| 123 | * |
| 124 | * Caller must hold socket lock |
| 125 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 126 | static void reject_rx_queue(struct sock *sk) |
| 127 | { |
| 128 | struct sk_buff *buf; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 129 | u32 dnode; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 130 | |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 131 | while ((buf = __skb_dequeue(&sk->sk_receive_queue))) { |
| 132 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 133 | tipc_link_xmit(buf, dnode, 0); |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 134 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | /** |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 138 | * tipc_sk_create - create a TIPC socket |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 139 | * @net: network namespace (must be default network) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 140 | * @sock: pre-allocated socket structure |
| 141 | * @protocol: protocol indicator (must be 0) |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 142 | * @kern: caused by kernel or by userspace? |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 143 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 144 | * This routine creates additional data structures used by the TIPC socket, |
| 145 | * initializes them, and links them together. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 146 | * |
| 147 | * Returns 0 on success, errno otherwise |
| 148 | */ |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 149 | static int tipc_sk_create(struct net *net, struct socket *sock, |
| 150 | int protocol, int kern) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 151 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 152 | const struct proto_ops *ops; |
| 153 | socket_state state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 154 | struct sock *sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 155 | struct tipc_sock *tsk; |
| 156 | struct tipc_port *port; |
| 157 | u32 ref; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 158 | |
| 159 | /* Validate arguments */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 160 | if (unlikely(protocol != 0)) |
| 161 | return -EPROTONOSUPPORT; |
| 162 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 163 | switch (sock->type) { |
| 164 | case SOCK_STREAM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 165 | ops = &stream_ops; |
| 166 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 167 | break; |
| 168 | case SOCK_SEQPACKET: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 169 | ops = &packet_ops; |
| 170 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 171 | break; |
| 172 | case SOCK_DGRAM: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 173 | case SOCK_RDM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 174 | ops = &msg_ops; |
| 175 | state = SS_READY; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 176 | break; |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 177 | default: |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 178 | return -EPROTOTYPE; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 179 | } |
| 180 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 181 | /* Allocate socket's protocol area */ |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 182 | if (!kern) |
| 183 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); |
| 184 | else |
| 185 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); |
| 186 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 187 | if (sk == NULL) |
| 188 | return -ENOMEM; |
| 189 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 190 | tsk = tipc_sk(sk); |
| 191 | port = &tsk->port; |
| 192 | |
| 193 | ref = tipc_port_init(port, TIPC_LOW_IMPORTANCE); |
| 194 | if (!ref) { |
| 195 | pr_warn("Socket registration failed, ref. table exhausted\n"); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 196 | sk_free(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 197 | return -ENOMEM; |
| 198 | } |
| 199 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 200 | /* Finish initializing socket data structures */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 201 | sock->ops = ops; |
| 202 | sock->state = state; |
| 203 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 204 | sock_init_data(sock, sk); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 205 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 206 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 207 | sk->sk_data_ready = tipc_data_ready; |
| 208 | sk->sk_write_space = tipc_write_space; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 209 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 210 | tsk->sent_unacked = 0; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 211 | atomic_set(&tsk->dupl_rcvcnt, 0); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 212 | tipc_port_unlock(port); |
Allan Stephens | 7ef43eb | 2008-05-12 15:42:28 -0700 | [diff] [blame] | 213 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 214 | if (sock->state == SS_READY) { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 215 | tipc_port_set_unreturnable(port, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 216 | if (sock->type == SOCK_DGRAM) |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 217 | tipc_port_set_unreliable(port, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 218 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | /** |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 223 | * tipc_sock_create_local - create TIPC socket from inside TIPC module |
| 224 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET |
| 225 | * |
| 226 | * We cannot use sock_creat_kern here because it bumps module user count. |
| 227 | * Since socket owner and creator is the same module we must make sure |
| 228 | * that module count remains zero for module local sockets, otherwise |
| 229 | * we cannot do rmmod. |
| 230 | * |
| 231 | * Returns 0 on success, errno otherwise |
| 232 | */ |
| 233 | int tipc_sock_create_local(int type, struct socket **res) |
| 234 | { |
| 235 | int rc; |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 236 | |
| 237 | rc = sock_create_lite(AF_TIPC, type, 0, res); |
| 238 | if (rc < 0) { |
| 239 | pr_err("Failed to create kernel socket\n"); |
| 240 | return rc; |
| 241 | } |
| 242 | tipc_sk_create(&init_net, *res, 0, 1); |
| 243 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * tipc_sock_release_local - release socket created by tipc_sock_create_local |
| 249 | * @sock: the socket to be released. |
| 250 | * |
| 251 | * Module reference count is not incremented when such sockets are created, |
| 252 | * so we must keep it from being decremented when they are released. |
| 253 | */ |
| 254 | void tipc_sock_release_local(struct socket *sock) |
| 255 | { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 256 | tipc_release(sock); |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 257 | sock->ops = NULL; |
| 258 | sock_release(sock); |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * tipc_sock_accept_local - accept a connection on a socket created |
| 263 | * with tipc_sock_create_local. Use this function to avoid that |
| 264 | * module reference count is inadvertently incremented. |
| 265 | * |
| 266 | * @sock: the accepting socket |
| 267 | * @newsock: reference to the new socket to be created |
| 268 | * @flags: socket flags |
| 269 | */ |
| 270 | |
| 271 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 272 | int flags) |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 273 | { |
| 274 | struct sock *sk = sock->sk; |
| 275 | int ret; |
| 276 | |
| 277 | ret = sock_create_lite(sk->sk_family, sk->sk_type, |
| 278 | sk->sk_protocol, newsock); |
| 279 | if (ret < 0) |
| 280 | return ret; |
| 281 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 282 | ret = tipc_accept(sock, *newsock, flags); |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 283 | if (ret < 0) { |
| 284 | sock_release(*newsock); |
| 285 | return ret; |
| 286 | } |
| 287 | (*newsock)->ops = sock->ops; |
| 288 | return ret; |
| 289 | } |
| 290 | |
| 291 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 292 | * tipc_release - destroy a TIPC socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 293 | * @sock: socket to destroy |
| 294 | * |
| 295 | * This routine cleans up any messages that are still queued on the socket. |
| 296 | * For DGRAM and RDM socket types, all queued messages are rejected. |
| 297 | * For SEQPACKET and STREAM socket types, the first message is rejected |
| 298 | * and any others are discarded. (If the first message on a STREAM socket |
| 299 | * is partially-read, it is discarded and the next one is rejected instead.) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 300 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 301 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
| 302 | * are returned or discarded according to the "destination droppable" setting |
| 303 | * specified for the message by the sender. |
| 304 | * |
| 305 | * Returns 0 on success, errno otherwise |
| 306 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 307 | static int tipc_release(struct socket *sock) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 308 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 309 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 310 | struct tipc_sock *tsk; |
| 311 | struct tipc_port *port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 312 | struct sk_buff *buf; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 313 | u32 dnode; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 314 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 315 | /* |
| 316 | * Exit if socket isn't fully initialized (occurs when a failed accept() |
| 317 | * releases a pre-allocated child socket that was never used) |
| 318 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 319 | if (sk == NULL) |
| 320 | return 0; |
| 321 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 322 | tsk = tipc_sk(sk); |
| 323 | port = &tsk->port; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 324 | lock_sock(sk); |
| 325 | |
| 326 | /* |
| 327 | * Reject all unreceived messages, except on an active connection |
| 328 | * (which disconnects locally & sends a 'FIN+' to peer) |
| 329 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 330 | while (sock->state != SS_DISCONNECTING) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 331 | buf = __skb_dequeue(&sk->sk_receive_queue); |
| 332 | if (buf == NULL) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 333 | break; |
Ying Xue | 4068243 | 2013-10-18 07:23:16 +0200 | [diff] [blame] | 334 | if (TIPC_SKB_CB(buf)->handle != NULL) |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 335 | kfree_skb(buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 336 | else { |
| 337 | if ((sock->state == SS_CONNECTING) || |
| 338 | (sock->state == SS_CONNECTED)) { |
| 339 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 340 | tipc_port_disconnect(port->ref); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 341 | } |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 342 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 343 | tipc_link_xmit(buf, dnode, 0); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 344 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 345 | } |
| 346 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 347 | /* Destroy TIPC port; also disconnects an active connection and |
| 348 | * sends a 'FIN-' to peer. |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 349 | */ |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 350 | tipc_port_destroy(port); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 351 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 352 | /* Discard any remaining (connection-based) messages in receive queue */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 353 | __skb_queue_purge(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 354 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 355 | /* Reject any messages that accumulated in backlog queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 356 | sock->state = SS_DISCONNECTING; |
| 357 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 358 | |
| 359 | sock_put(sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 360 | sock->sk = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 361 | |
Geert Uytterhoeven | 065d7e3 | 2014-04-06 15:56:14 +0200 | [diff] [blame] | 362 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 363 | } |
| 364 | |
| 365 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 366 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 367 | * @sock: socket structure |
| 368 | * @uaddr: socket address describing name(s) and desired operation |
| 369 | * @uaddr_len: size of socket address data structure |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 370 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 371 | * Name and name sequence binding is indicated using a positive scope value; |
| 372 | * a negative scope value unbinds the specified name. Specifying no name |
| 373 | * (i.e. a socket address length of 0) unbinds all names from the socket. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 374 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 375 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 376 | * |
| 377 | * NOTE: This routine doesn't need to take the socket lock since it doesn't |
| 378 | * access any non-constant socket information. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 379 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 380 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
| 381 | int uaddr_len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 382 | { |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 383 | struct sock *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 384 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 385 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 386 | int res = -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 387 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 388 | lock_sock(sk); |
| 389 | if (unlikely(!uaddr_len)) { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 390 | res = tipc_withdraw(&tsk->port, 0, NULL); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 391 | goto exit; |
| 392 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 393 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 394 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
| 395 | res = -EINVAL; |
| 396 | goto exit; |
| 397 | } |
| 398 | if (addr->family != AF_TIPC) { |
| 399 | res = -EAFNOSUPPORT; |
| 400 | goto exit; |
| 401 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 402 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 403 | if (addr->addrtype == TIPC_ADDR_NAME) |
| 404 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 405 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
| 406 | res = -EAFNOSUPPORT; |
| 407 | goto exit; |
| 408 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 409 | |
Ying Xue | 13a2e89 | 2013-06-17 10:54:40 -0400 | [diff] [blame] | 410 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
Ying Xue | 7d0ab17 | 2013-06-17 10:54:41 -0400 | [diff] [blame] | 411 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 412 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
| 413 | res = -EACCES; |
| 414 | goto exit; |
| 415 | } |
Allan Stephens | c422f1b | 2011-11-02 15:49:40 -0400 | [diff] [blame] | 416 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 417 | res = (addr->scope > 0) ? |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 418 | tipc_publish(&tsk->port, addr->scope, &addr->addr.nameseq) : |
| 419 | tipc_withdraw(&tsk->port, -addr->scope, &addr->addr.nameseq); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 420 | exit: |
| 421 | release_sock(sk); |
| 422 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 423 | } |
| 424 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 425 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 426 | * tipc_getname - get port ID of socket or peer socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 427 | * @sock: socket structure |
| 428 | * @uaddr: area for returned socket address |
| 429 | * @uaddr_len: area for returned length of socket address |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 430 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 431 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 432 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 433 | * |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 434 | * NOTE: This routine doesn't need to take the socket lock since it only |
| 435 | * accesses socket information that is unchanging (or which changes in |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 436 | * a completely predictable manner). |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 437 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 438 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
| 439 | int *uaddr_len, int peer) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 440 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 441 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 442 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 443 | |
Kulikov Vasiliy | 88f8a5e | 2010-10-31 07:10:32 +0000 | [diff] [blame] | 444 | memset(addr, 0, sizeof(*addr)); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 445 | if (peer) { |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 446 | if ((sock->state != SS_CONNECTED) && |
| 447 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) |
| 448 | return -ENOTCONN; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 449 | addr->addr.id.ref = tipc_port_peerport(&tsk->port); |
| 450 | addr->addr.id.node = tipc_port_peernode(&tsk->port); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 451 | } else { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 452 | addr->addr.id.ref = tsk->port.ref; |
Allan Stephens | b924dcf | 2010-11-30 12:01:03 +0000 | [diff] [blame] | 453 | addr->addr.id.node = tipc_own_addr; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 454 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 455 | |
| 456 | *uaddr_len = sizeof(*addr); |
| 457 | addr->addrtype = TIPC_ADDR_ID; |
| 458 | addr->family = AF_TIPC; |
| 459 | addr->scope = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 460 | addr->addr.name.domain = 0; |
| 461 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 462 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 466 | * tipc_poll - read and possibly block on pollmask |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 467 | * @file: file structure associated with the socket |
| 468 | * @sock: socket for which to calculate the poll bits |
| 469 | * @wait: ??? |
| 470 | * |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 471 | * Returns pollmask value |
| 472 | * |
| 473 | * COMMENTARY: |
| 474 | * It appears that the usual socket locking mechanisms are not useful here |
| 475 | * since the pollmask info is potentially out-of-date the moment this routine |
| 476 | * exits. TCP and other protocols seem to rely on higher level poll routines |
| 477 | * to handle any preventable race conditions, so TIPC will do the same ... |
| 478 | * |
| 479 | * TIPC sets the returned events as follows: |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 480 | * |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 481 | * socket state flags set |
| 482 | * ------------ --------- |
| 483 | * unconnected no read flags |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 484 | * POLLOUT if port is not congested |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 485 | * |
| 486 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue |
| 487 | * no write flags |
| 488 | * |
| 489 | * connected POLLIN/POLLRDNORM if data in rx queue |
| 490 | * POLLOUT if port is not congested |
| 491 | * |
| 492 | * disconnecting POLLIN/POLLRDNORM/POLLHUP |
| 493 | * no write flags |
| 494 | * |
| 495 | * listening POLLIN if SYN in rx queue |
| 496 | * no write flags |
| 497 | * |
| 498 | * ready POLLIN/POLLRDNORM if data in rx queue |
| 499 | * [connectionless] POLLOUT (since port cannot be congested) |
| 500 | * |
| 501 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
| 502 | * imply that the operation will succeed, merely that it should be performed |
| 503 | * and will not block. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 504 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 505 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
| 506 | poll_table *wait) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 507 | { |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 508 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 509 | struct tipc_sock *tsk = tipc_sk(sk); |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 510 | u32 mask = 0; |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 511 | |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 512 | sock_poll_wait(file, sk_sleep(sk), wait); |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 513 | |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 514 | switch ((int)sock->state) { |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 515 | case SS_UNCONNECTED: |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 516 | if (!tsk->link_cong) |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 517 | mask |= POLLOUT; |
| 518 | break; |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 519 | case SS_READY: |
| 520 | case SS_CONNECTED: |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 521 | if (!tsk->link_cong && !tipc_sk_conn_cong(tsk)) |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 522 | mask |= POLLOUT; |
| 523 | /* fall thru' */ |
| 524 | case SS_CONNECTING: |
| 525 | case SS_LISTENING: |
| 526 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 527 | mask |= (POLLIN | POLLRDNORM); |
| 528 | break; |
| 529 | case SS_DISCONNECTING: |
| 530 | mask = (POLLIN | POLLRDNORM | POLLHUP); |
| 531 | break; |
| 532 | } |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 533 | |
| 534 | return mask; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 535 | } |
| 536 | |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 537 | /** |
| 538 | * tipc_sendmcast - send multicast message |
| 539 | * @sock: socket structure |
| 540 | * @seq: destination address |
| 541 | * @iov: message data to send |
| 542 | * @dsz: total length of message data |
| 543 | * @timeo: timeout to wait for wakeup |
| 544 | * |
| 545 | * Called from function tipc_sendmsg(), which has done all sanity checks |
| 546 | * Returns the number of bytes sent on success, or errno |
| 547 | */ |
| 548 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, |
| 549 | struct iovec *iov, size_t dsz, long timeo) |
| 550 | { |
| 551 | struct sock *sk = sock->sk; |
| 552 | struct tipc_msg *mhdr = &tipc_sk(sk)->port.phdr; |
| 553 | struct sk_buff *buf; |
| 554 | uint mtu; |
| 555 | int rc; |
| 556 | |
| 557 | msg_set_type(mhdr, TIPC_MCAST_MSG); |
| 558 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); |
| 559 | msg_set_destport(mhdr, 0); |
| 560 | msg_set_destnode(mhdr, 0); |
| 561 | msg_set_nametype(mhdr, seq->type); |
| 562 | msg_set_namelower(mhdr, seq->lower); |
| 563 | msg_set_nameupper(mhdr, seq->upper); |
| 564 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); |
| 565 | |
| 566 | new_mtu: |
| 567 | mtu = tipc_bclink_get_mtu(); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 568 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 569 | if (unlikely(rc < 0)) |
| 570 | return rc; |
| 571 | |
| 572 | do { |
| 573 | rc = tipc_bclink_xmit(buf); |
| 574 | if (likely(rc >= 0)) { |
| 575 | rc = dsz; |
| 576 | break; |
| 577 | } |
| 578 | if (rc == -EMSGSIZE) |
| 579 | goto new_mtu; |
| 580 | if (rc != -ELINKCONG) |
| 581 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame^] | 582 | tipc_sk(sk)->link_cong = 1; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 583 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
| 584 | if (rc) |
| 585 | kfree_skb_list(buf); |
| 586 | } while (!rc); |
| 587 | return rc; |
| 588 | } |
| 589 | |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 590 | /* tipc_sk_mcast_rcv - Deliver multicast message to all destination sockets |
| 591 | */ |
| 592 | void tipc_sk_mcast_rcv(struct sk_buff *buf) |
| 593 | { |
| 594 | struct tipc_msg *msg = buf_msg(buf); |
| 595 | struct tipc_port_list dports = {0, NULL, }; |
| 596 | struct tipc_port_list *item; |
| 597 | struct sk_buff *b; |
| 598 | uint i, last, dst = 0; |
| 599 | u32 scope = TIPC_CLUSTER_SCOPE; |
| 600 | |
| 601 | if (in_own_node(msg_orignode(msg))) |
| 602 | scope = TIPC_NODE_SCOPE; |
| 603 | |
| 604 | /* Create destination port list: */ |
| 605 | tipc_nametbl_mc_translate(msg_nametype(msg), |
| 606 | msg_namelower(msg), |
| 607 | msg_nameupper(msg), |
| 608 | scope, |
| 609 | &dports); |
| 610 | last = dports.count; |
| 611 | if (!last) { |
| 612 | kfree_skb(buf); |
| 613 | return; |
| 614 | } |
| 615 | |
| 616 | for (item = &dports; item; item = item->next) { |
| 617 | for (i = 0; i < PLSIZE && ++dst <= last; i++) { |
| 618 | b = (dst != last) ? skb_clone(buf, GFP_ATOMIC) : buf; |
| 619 | if (!b) { |
| 620 | pr_warn("Failed do clone mcast rcv buffer\n"); |
| 621 | continue; |
| 622 | } |
| 623 | msg_set_destport(msg, item->ports[i]); |
| 624 | tipc_sk_rcv(b); |
| 625 | } |
| 626 | } |
| 627 | tipc_port_list_free(&dports); |
| 628 | } |
| 629 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 630 | /** |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 631 | * tipc_sk_proto_rcv - receive a connection mng protocol message |
| 632 | * @tsk: receiving socket |
| 633 | * @dnode: node to send response message to, if any |
| 634 | * @buf: buffer containing protocol message |
| 635 | * Returns 0 (TIPC_OK) if message was consumed, 1 (TIPC_FWD_MSG) if |
| 636 | * (CONN_PROBE_REPLY) message should be forwarded. |
| 637 | */ |
Wei Yongjun | 52f50ce | 2014-07-20 13:14:28 +0800 | [diff] [blame] | 638 | static int tipc_sk_proto_rcv(struct tipc_sock *tsk, u32 *dnode, |
| 639 | struct sk_buff *buf) |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 640 | { |
| 641 | struct tipc_msg *msg = buf_msg(buf); |
| 642 | struct tipc_port *port = &tsk->port; |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 643 | int conn_cong; |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 644 | |
| 645 | /* Ignore if connection cannot be validated: */ |
| 646 | if (!port->connected || !tipc_port_peer_msg(port, msg)) |
| 647 | goto exit; |
| 648 | |
| 649 | port->probing_state = TIPC_CONN_OK; |
| 650 | |
| 651 | if (msg_type(msg) == CONN_ACK) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 652 | conn_cong = tipc_sk_conn_cong(tsk); |
| 653 | tsk->sent_unacked -= msg_msgcnt(msg); |
| 654 | if (conn_cong) |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame^] | 655 | tsk->sk.sk_write_space(&tsk->sk); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 656 | } else if (msg_type(msg) == CONN_PROBE) { |
| 657 | if (!tipc_msg_reverse(buf, dnode, TIPC_OK)) |
| 658 | return TIPC_OK; |
| 659 | msg_set_type(msg, CONN_PROBE_REPLY); |
| 660 | return TIPC_FWD_MSG; |
| 661 | } |
| 662 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ |
| 663 | exit: |
| 664 | kfree_skb(buf); |
| 665 | return TIPC_OK; |
| 666 | } |
| 667 | |
| 668 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 669 | * dest_name_check - verify user is permitted to send to specified port name |
| 670 | * @dest: destination address |
| 671 | * @m: descriptor for message to be sent |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 672 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 673 | * Prevents restricted configuration commands from being issued by |
| 674 | * unauthorized users. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 675 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 676 | * Returns 0 if permission is granted, otherwise errno |
| 677 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 678 | static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 679 | { |
| 680 | struct tipc_cfg_msg_hdr hdr; |
| 681 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 682 | if (unlikely(dest->addrtype == TIPC_ADDR_ID)) |
| 683 | return 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 684 | if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES)) |
| 685 | return 0; |
| 686 | if (likely(dest->addr.name.name.type == TIPC_TOP_SRV)) |
| 687 | return 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 688 | if (likely(dest->addr.name.name.type != TIPC_CFG_SRV)) |
| 689 | return -EACCES; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 690 | |
Allan Stephens | 3f8dd94 | 2011-01-18 13:09:29 -0500 | [diff] [blame] | 691 | if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr))) |
| 692 | return -EMSGSIZE; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 693 | if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 694 | return -EFAULT; |
Allan Stephens | 70cb234 | 2006-06-25 23:41:47 -0700 | [diff] [blame] | 695 | if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 696 | return -EACCES; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 697 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 698 | return 0; |
| 699 | } |
| 700 | |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 701 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
| 702 | { |
| 703 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 704 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 705 | DEFINE_WAIT(wait); |
| 706 | int done; |
| 707 | |
| 708 | do { |
| 709 | int err = sock_error(sk); |
| 710 | if (err) |
| 711 | return err; |
| 712 | if (sock->state == SS_DISCONNECTING) |
| 713 | return -EPIPE; |
| 714 | if (!*timeo_p) |
| 715 | return -EAGAIN; |
| 716 | if (signal_pending(current)) |
| 717 | return sock_intr_errno(*timeo_p); |
| 718 | |
| 719 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 720 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 721 | finish_wait(sk_sleep(sk), &wait); |
| 722 | } while (!done); |
| 723 | return 0; |
| 724 | } |
| 725 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 726 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 727 | * tipc_sendmsg - send message in connectionless manner |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 728 | * @iocb: if NULL, indicates that socket lock is already held |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 729 | * @sock: socket structure |
| 730 | * @m: message to send |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 731 | * @dsz: amount of user data to be sent |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 732 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 733 | * Message must have an destination specified explicitly. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 734 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 735 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
| 736 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 737 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 738 | * Returns the number of bytes sent on success, or errno otherwise |
| 739 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 740 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 741 | struct msghdr *m, size_t dsz) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 742 | { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 743 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 744 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 745 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 5c31142 | 2014-03-12 11:31:13 -0400 | [diff] [blame] | 746 | struct tipc_port *port = &tsk->port; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 747 | struct tipc_msg *mhdr = &port->phdr; |
| 748 | struct iovec *iov = m->msg_iov; |
| 749 | u32 dnode, dport; |
| 750 | struct sk_buff *buf; |
| 751 | struct tipc_name_seq *seq = &dest->addr.nameseq; |
| 752 | u32 mtu; |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 753 | long timeo; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 754 | int rc = -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 755 | |
| 756 | if (unlikely(!dest)) |
| 757 | return -EDESTADDRREQ; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 758 | |
Allan Stephens | 51f9cc1 | 2006-06-25 23:49:06 -0700 | [diff] [blame] | 759 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
| 760 | (dest->family != AF_TIPC))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 761 | return -EINVAL; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 762 | |
| 763 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
Allan Stephens | c29c3f7 | 2010-04-20 17:58:24 -0400 | [diff] [blame] | 764 | return -EMSGSIZE; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 765 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 766 | if (iocb) |
| 767 | lock_sock(sk); |
| 768 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 769 | if (unlikely(sock->state != SS_READY)) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 770 | if (sock->state == SS_LISTENING) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 771 | rc = -EPIPE; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 772 | goto exit; |
Allan Stephens | 3388007 | 2006-06-25 23:44:57 -0700 | [diff] [blame] | 773 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 774 | if (sock->state != SS_UNCONNECTED) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 775 | rc = -EISCONN; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 776 | goto exit; |
| 777 | } |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 778 | if (tsk->port.published) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 779 | rc = -EOPNOTSUPP; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 780 | goto exit; |
| 781 | } |
| 782 | if (dest->addrtype == TIPC_ADDR_NAME) { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 783 | tsk->port.conn_type = dest->addr.name.name.type; |
| 784 | tsk->port.conn_instance = dest->addr.name.name.instance; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 785 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 786 | } |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 787 | rc = dest_name_check(dest, m); |
| 788 | if (rc) |
| 789 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 790 | |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 791 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 792 | |
| 793 | if (dest->addrtype == TIPC_ADDR_MCAST) { |
| 794 | rc = tipc_sendmcast(sock, seq, iov, dsz, timeo); |
| 795 | goto exit; |
| 796 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
| 797 | u32 type = dest->addr.name.name.type; |
| 798 | u32 inst = dest->addr.name.name.instance; |
| 799 | u32 domain = dest->addr.name.domain; |
| 800 | |
| 801 | dnode = domain; |
| 802 | msg_set_type(mhdr, TIPC_NAMED_MSG); |
| 803 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); |
| 804 | msg_set_nametype(mhdr, type); |
| 805 | msg_set_nameinst(mhdr, inst); |
| 806 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); |
| 807 | dport = tipc_nametbl_translate(type, inst, &dnode); |
| 808 | msg_set_destnode(mhdr, dnode); |
| 809 | msg_set_destport(mhdr, dport); |
| 810 | if (unlikely(!dport && !dnode)) { |
| 811 | rc = -EHOSTUNREACH; |
| 812 | goto exit; |
| 813 | } |
| 814 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
| 815 | dnode = dest->addr.id.node; |
| 816 | msg_set_type(mhdr, TIPC_DIRECT_MSG); |
| 817 | msg_set_lookup_scope(mhdr, 0); |
| 818 | msg_set_destnode(mhdr, dnode); |
| 819 | msg_set_destport(mhdr, dest->addr.id.ref); |
| 820 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); |
| 821 | } |
| 822 | |
| 823 | new_mtu: |
| 824 | mtu = tipc_node_get_mtu(dnode, tsk->port.ref); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 825 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 826 | if (rc < 0) |
| 827 | goto exit; |
| 828 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 829 | do { |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame^] | 830 | TIPC_SKB_CB(buf)->wakeup_pending = tsk->link_cong; |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 831 | rc = tipc_link_xmit(buf, dnode, tsk->port.ref); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 832 | if (likely(rc >= 0)) { |
| 833 | if (sock->state != SS_READY) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 834 | sock->state = SS_CONNECTING; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 835 | rc = dsz; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 836 | break; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 837 | } |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 838 | if (rc == -EMSGSIZE) |
| 839 | goto new_mtu; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 840 | if (rc != -ELINKCONG) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 841 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame^] | 842 | tsk->link_cong = 1; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 843 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
Erik Hugne | 70452dc | 2014-07-06 20:38:50 -0400 | [diff] [blame] | 844 | if (rc) |
| 845 | kfree_skb_list(buf); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 846 | } while (!rc); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 847 | exit: |
| 848 | if (iocb) |
| 849 | release_sock(sk); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 850 | |
| 851 | return rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 852 | } |
| 853 | |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 854 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
| 855 | { |
| 856 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 857 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 858 | DEFINE_WAIT(wait); |
| 859 | int done; |
| 860 | |
| 861 | do { |
| 862 | int err = sock_error(sk); |
| 863 | if (err) |
| 864 | return err; |
| 865 | if (sock->state == SS_DISCONNECTING) |
| 866 | return -EPIPE; |
| 867 | else if (sock->state != SS_CONNECTED) |
| 868 | return -ENOTCONN; |
| 869 | if (!*timeo_p) |
| 870 | return -EAGAIN; |
| 871 | if (signal_pending(current)) |
| 872 | return sock_intr_errno(*timeo_p); |
| 873 | |
| 874 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
| 875 | done = sk_wait_event(sk, timeo_p, |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 876 | (!tsk->link_cong && |
| 877 | !tipc_sk_conn_cong(tsk)) || |
| 878 | !tsk->port.connected); |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 879 | finish_wait(sk_sleep(sk), &wait); |
| 880 | } while (!done); |
| 881 | return 0; |
| 882 | } |
| 883 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 884 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 885 | * tipc_send_stream - send stream-oriented data |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 886 | * @iocb: (unused) |
| 887 | * @sock: socket structure |
| 888 | * @m: data to send |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 889 | * @dsz: total length of data to be transmitted |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 890 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 891 | * Used for SOCK_STREAM data. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 892 | * |
| 893 | * Returns the number of bytes sent on success (or partial success), |
Allan Stephens | 1303e8f | 2006-06-25 23:46:50 -0700 | [diff] [blame] | 894 | * or errno if no data sent |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 895 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 896 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 897 | struct msghdr *m, size_t dsz) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 898 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 899 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 900 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 901 | struct tipc_port *port = &tsk->port; |
| 902 | struct tipc_msg *mhdr = &port->phdr; |
| 903 | struct sk_buff *buf; |
| 904 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
| 905 | u32 ref = port->ref; |
| 906 | int rc = -EINVAL; |
| 907 | long timeo; |
| 908 | u32 dnode; |
| 909 | uint mtu, send, sent = 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 910 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 911 | /* Handle implied connection establishment */ |
| 912 | if (unlikely(dest)) { |
| 913 | rc = tipc_sendmsg(iocb, sock, m, dsz); |
| 914 | if (dsz && (dsz == rc)) |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 915 | tsk->sent_unacked = 1; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 916 | return rc; |
| 917 | } |
| 918 | if (dsz > (uint)INT_MAX) |
| 919 | return -EMSGSIZE; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 920 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 921 | if (iocb) |
| 922 | lock_sock(sk); |
| 923 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 924 | if (unlikely(sock->state != SS_CONNECTED)) { |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 925 | if (sock->state == SS_DISCONNECTING) |
| 926 | rc = -EPIPE; |
wangweidong | b055597 | 2013-12-27 10:09:39 +0800 | [diff] [blame] | 927 | else |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 928 | rc = -ENOTCONN; |
wangweidong | 3b8401f | 2013-12-12 09:36:40 +0800 | [diff] [blame] | 929 | goto exit; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 930 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 931 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 932 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
| 933 | dnode = tipc_port_peernode(port); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 934 | |
| 935 | next: |
| 936 | mtu = port->max_pkt; |
| 937 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 938 | rc = tipc_msg_build(mhdr, m->msg_iov, sent, send, mtu, &buf); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 939 | if (unlikely(rc < 0)) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 940 | goto exit; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 941 | do { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 942 | if (likely(!tipc_sk_conn_cong(tsk))) { |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 943 | rc = tipc_link_xmit(buf, dnode, ref); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 944 | if (likely(!rc)) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 945 | tsk->sent_unacked++; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 946 | sent += send; |
| 947 | if (sent == dsz) |
| 948 | break; |
| 949 | goto next; |
Allan Stephens | 1303e8f | 2006-06-25 23:46:50 -0700 | [diff] [blame] | 950 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 951 | if (rc == -EMSGSIZE) { |
| 952 | port->max_pkt = tipc_node_get_mtu(dnode, ref); |
| 953 | goto next; |
| 954 | } |
| 955 | if (rc != -ELINKCONG) |
| 956 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame^] | 957 | tsk->link_cong = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 958 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 959 | rc = tipc_wait_for_sndpkt(sock, &timeo); |
Erik Hugne | 70452dc | 2014-07-06 20:38:50 -0400 | [diff] [blame] | 960 | if (rc) |
| 961 | kfree_skb_list(buf); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 962 | } while (!rc); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 963 | exit: |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 964 | if (iocb) |
| 965 | release_sock(sk); |
| 966 | return sent ? sent : rc; |
| 967 | } |
| 968 | |
| 969 | /** |
| 970 | * tipc_send_packet - send a connection-oriented message |
| 971 | * @iocb: if NULL, indicates that socket lock is already held |
| 972 | * @sock: socket structure |
| 973 | * @m: message to send |
| 974 | * @dsz: length of data to be transmitted |
| 975 | * |
| 976 | * Used for SOCK_SEQPACKET messages. |
| 977 | * |
| 978 | * Returns the number of bytes sent on success, or errno otherwise |
| 979 | */ |
| 980 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
| 981 | struct msghdr *m, size_t dsz) |
| 982 | { |
| 983 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
| 984 | return -EMSGSIZE; |
| 985 | |
| 986 | return tipc_send_stream(iocb, sock, m, dsz); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 987 | } |
| 988 | |
| 989 | /** |
| 990 | * auto_connect - complete connection setup to a remote port |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 991 | * @tsk: tipc socket structure |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 992 | * @msg: peer's response message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 993 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 994 | * Returns 0 on success, errno otherwise |
| 995 | */ |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 996 | static int auto_connect(struct tipc_sock *tsk, struct tipc_msg *msg) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 997 | { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 998 | struct tipc_port *port = &tsk->port; |
| 999 | struct socket *sock = tsk->sk.sk_socket; |
Jon Paul Maloy | f9fef18 | 2014-03-12 11:31:08 -0400 | [diff] [blame] | 1000 | struct tipc_portid peer; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1001 | |
Jon Paul Maloy | f9fef18 | 2014-03-12 11:31:08 -0400 | [diff] [blame] | 1002 | peer.ref = msg_origport(msg); |
| 1003 | peer.node = msg_orignode(msg); |
| 1004 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1005 | __tipc_port_connect(port->ref, port, &peer); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1006 | |
| 1007 | if (msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE) |
| 1008 | return -EINVAL; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1009 | msg_set_importance(&port->phdr, (u32)msg_importance(msg)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1010 | sock->state = SS_CONNECTED; |
| 1011 | return 0; |
| 1012 | } |
| 1013 | |
| 1014 | /** |
| 1015 | * set_orig_addr - capture sender's address for received message |
| 1016 | * @m: descriptor for message info |
| 1017 | * @msg: received message header |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1018 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1019 | * Note: Address is not captured if not requested by receiver. |
| 1020 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 1021 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1022 | { |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 1023 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1024 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1025 | if (addr) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1026 | addr->family = AF_TIPC; |
| 1027 | addr->addrtype = TIPC_ADDR_ID; |
Mathias Krause | 60085c3 | 2013-04-07 01:52:00 +0000 | [diff] [blame] | 1028 | memset(&addr->addr, 0, sizeof(addr->addr)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1029 | addr->addr.id.ref = msg_origport(msg); |
| 1030 | addr->addr.id.node = msg_orignode(msg); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1031 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
| 1032 | addr->scope = 0; /* could leave uninitialized */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1033 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
| 1034 | } |
| 1035 | } |
| 1036 | |
| 1037 | /** |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1038 | * anc_data_recv - optionally capture ancillary data for received message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1039 | * @m: descriptor for message info |
| 1040 | * @msg: received message header |
| 1041 | * @tport: TIPC port associated with message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1042 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1043 | * Note: Ancillary data is not captured if not requested by receiver. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1044 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1045 | * Returns 0 if successful, otherwise errno |
| 1046 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 1047 | static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 1048 | struct tipc_port *tport) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1049 | { |
| 1050 | u32 anc_data[3]; |
| 1051 | u32 err; |
| 1052 | u32 dest_type; |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1053 | int has_name; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1054 | int res; |
| 1055 | |
| 1056 | if (likely(m->msg_controllen == 0)) |
| 1057 | return 0; |
| 1058 | |
| 1059 | /* Optionally capture errored message object(s) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1060 | err = msg ? msg_errcode(msg) : 0; |
| 1061 | if (unlikely(err)) { |
| 1062 | anc_data[0] = err; |
| 1063 | anc_data[1] = msg_data_sz(msg); |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1064 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
| 1065 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1066 | return res; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1067 | if (anc_data[1]) { |
| 1068 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], |
| 1069 | msg_data(msg)); |
| 1070 | if (res) |
| 1071 | return res; |
| 1072 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1073 | } |
| 1074 | |
| 1075 | /* Optionally capture message destination object */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1076 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
| 1077 | switch (dest_type) { |
| 1078 | case TIPC_NAMED_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1079 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1080 | anc_data[0] = msg_nametype(msg); |
| 1081 | anc_data[1] = msg_namelower(msg); |
| 1082 | anc_data[2] = msg_namelower(msg); |
| 1083 | break; |
| 1084 | case TIPC_MCAST_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1085 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1086 | anc_data[0] = msg_nametype(msg); |
| 1087 | anc_data[1] = msg_namelower(msg); |
| 1088 | anc_data[2] = msg_nameupper(msg); |
| 1089 | break; |
| 1090 | case TIPC_CONN_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1091 | has_name = (tport->conn_type != 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1092 | anc_data[0] = tport->conn_type; |
| 1093 | anc_data[1] = tport->conn_instance; |
| 1094 | anc_data[2] = tport->conn_instance; |
| 1095 | break; |
| 1096 | default: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1097 | has_name = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1098 | } |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1099 | if (has_name) { |
| 1100 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); |
| 1101 | if (res) |
| 1102 | return res; |
| 1103 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1104 | |
| 1105 | return 0; |
| 1106 | } |
| 1107 | |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1108 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1109 | { |
| 1110 | struct sock *sk = sock->sk; |
| 1111 | DEFINE_WAIT(wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1112 | long timeo = *timeop; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1113 | int err; |
| 1114 | |
| 1115 | for (;;) { |
| 1116 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 1117 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1118 | if (sock->state == SS_DISCONNECTING) { |
| 1119 | err = -ENOTCONN; |
| 1120 | break; |
| 1121 | } |
| 1122 | release_sock(sk); |
| 1123 | timeo = schedule_timeout(timeo); |
| 1124 | lock_sock(sk); |
| 1125 | } |
| 1126 | err = 0; |
| 1127 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 1128 | break; |
| 1129 | err = sock_intr_errno(timeo); |
| 1130 | if (signal_pending(current)) |
| 1131 | break; |
| 1132 | err = -EAGAIN; |
| 1133 | if (!timeo) |
| 1134 | break; |
| 1135 | } |
| 1136 | finish_wait(sk_sleep(sk), &wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1137 | *timeop = timeo; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1138 | return err; |
| 1139 | } |
| 1140 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1141 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1142 | * tipc_recvmsg - receive packet-oriented message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1143 | * @iocb: (unused) |
| 1144 | * @m: descriptor for message info |
| 1145 | * @buf_len: total size of user buffer area |
| 1146 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1147 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1148 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
| 1149 | * If the complete message doesn't fit in user area, truncate it. |
| 1150 | * |
| 1151 | * Returns size of returned message data, errno otherwise |
| 1152 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1153 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 1154 | struct msghdr *m, size_t buf_len, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1155 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1156 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1157 | struct tipc_sock *tsk = tipc_sk(sk); |
| 1158 | struct tipc_port *port = &tsk->port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1159 | struct sk_buff *buf; |
| 1160 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1161 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1162 | unsigned int sz; |
| 1163 | u32 err; |
| 1164 | int res; |
| 1165 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1166 | /* Catch invalid receive requests */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1167 | if (unlikely(!buf_len)) |
| 1168 | return -EINVAL; |
| 1169 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1170 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1171 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1172 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1173 | res = -ENOTCONN; |
| 1174 | goto exit; |
| 1175 | } |
| 1176 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1177 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1178 | restart: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1179 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1180 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1181 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1182 | if (res) |
| 1183 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1184 | |
| 1185 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1186 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1187 | msg = buf_msg(buf); |
| 1188 | sz = msg_data_sz(msg); |
| 1189 | err = msg_errcode(msg); |
| 1190 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1191 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1192 | if ((!sz) && (!err)) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1193 | advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1194 | goto restart; |
| 1195 | } |
| 1196 | |
| 1197 | /* Capture sender's address (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1198 | set_orig_addr(m, msg); |
| 1199 | |
| 1200 | /* Capture ancillary data (optional) */ |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1201 | res = anc_data_recv(m, msg, port); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1202 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1203 | goto exit; |
| 1204 | |
| 1205 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1206 | if (!err) { |
| 1207 | if (unlikely(buf_len < sz)) { |
| 1208 | sz = buf_len; |
| 1209 | m->msg_flags |= MSG_TRUNC; |
| 1210 | } |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1211 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg), |
| 1212 | m->msg_iov, sz); |
| 1213 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1214 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1215 | res = sz; |
| 1216 | } else { |
| 1217 | if ((sock->state == SS_READY) || |
| 1218 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) |
| 1219 | res = 0; |
| 1220 | else |
| 1221 | res = -ECONNRESET; |
| 1222 | } |
| 1223 | |
| 1224 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1225 | if (likely(!(flags & MSG_PEEK))) { |
Allan Stephens | 9900980 | 2008-04-15 00:06:12 -0700 | [diff] [blame] | 1226 | if ((sock->state != SS_READY) && |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1227 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
| 1228 | tipc_acknowledge(port->ref, tsk->rcv_unacked); |
| 1229 | tsk->rcv_unacked = 0; |
| 1230 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1231 | advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1232 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1233 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1234 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1235 | return res; |
| 1236 | } |
| 1237 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1238 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1239 | * tipc_recv_stream - receive stream-oriented data |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1240 | * @iocb: (unused) |
| 1241 | * @m: descriptor for message info |
| 1242 | * @buf_len: total size of user buffer area |
| 1243 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1244 | * |
| 1245 | * Used for SOCK_STREAM messages only. If not enough data is available |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1246 | * will optionally wait for more; never truncates data. |
| 1247 | * |
| 1248 | * Returns size of returned message data, errno otherwise |
| 1249 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1250 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
| 1251 | struct msghdr *m, size_t buf_len, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1252 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1253 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1254 | struct tipc_sock *tsk = tipc_sk(sk); |
| 1255 | struct tipc_port *port = &tsk->port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1256 | struct sk_buff *buf; |
| 1257 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1258 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1259 | unsigned int sz; |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1260 | int sz_to_copy, target, needed; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1261 | int sz_copied = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1262 | u32 err; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1263 | int res = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1264 | |
| 1265 | /* Catch invalid receive attempts */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1266 | if (unlikely(!buf_len)) |
| 1267 | return -EINVAL; |
| 1268 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1269 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1270 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1271 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1272 | res = -ENOTCONN; |
| 1273 | goto exit; |
| 1274 | } |
| 1275 | |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1276 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1277 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 1278 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1279 | restart: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1280 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1281 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1282 | if (res) |
| 1283 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1284 | |
| 1285 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1286 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1287 | msg = buf_msg(buf); |
| 1288 | sz = msg_data_sz(msg); |
| 1289 | err = msg_errcode(msg); |
| 1290 | |
| 1291 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1292 | if ((!sz) && (!err)) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1293 | advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1294 | goto restart; |
| 1295 | } |
| 1296 | |
| 1297 | /* Optionally capture sender's address & ancillary data of first msg */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1298 | if (sz_copied == 0) { |
| 1299 | set_orig_addr(m, msg); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1300 | res = anc_data_recv(m, msg, port); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1301 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1302 | goto exit; |
| 1303 | } |
| 1304 | |
| 1305 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1306 | if (!err) { |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1307 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1308 | |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1309 | sz -= offset; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1310 | needed = (buf_len - sz_copied); |
| 1311 | sz_to_copy = (sz <= needed) ? sz : needed; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1312 | |
| 1313 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset, |
| 1314 | m->msg_iov, sz_to_copy); |
| 1315 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1316 | goto exit; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1317 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1318 | sz_copied += sz_to_copy; |
| 1319 | |
| 1320 | if (sz_to_copy < sz) { |
| 1321 | if (!(flags & MSG_PEEK)) |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1322 | TIPC_SKB_CB(buf)->handle = |
| 1323 | (void *)(unsigned long)(offset + sz_to_copy); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1324 | goto exit; |
| 1325 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1326 | } else { |
| 1327 | if (sz_copied != 0) |
| 1328 | goto exit; /* can't add error msg to valid data */ |
| 1329 | |
| 1330 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) |
| 1331 | res = 0; |
| 1332 | else |
| 1333 | res = -ECONNRESET; |
| 1334 | } |
| 1335 | |
| 1336 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1337 | if (likely(!(flags & MSG_PEEK))) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1338 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
| 1339 | tipc_acknowledge(port->ref, tsk->rcv_unacked); |
| 1340 | tsk->rcv_unacked = 0; |
| 1341 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1342 | advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1343 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1344 | |
| 1345 | /* Loop around if more data is required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1346 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
| 1347 | (!skb_queue_empty(&sk->sk_receive_queue) || |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1348 | (sz_copied < target)) && /* and more is ready or required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1349 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
| 1350 | (!err)) /* and haven't reached a FIN */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1351 | goto restart; |
| 1352 | |
| 1353 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1354 | release_sock(sk); |
Allan Stephens | a3b0a5a | 2006-06-25 23:48:22 -0700 | [diff] [blame] | 1355 | return sz_copied ? sz_copied : res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1356 | } |
| 1357 | |
| 1358 | /** |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1359 | * tipc_write_space - wake up thread if port congestion is released |
| 1360 | * @sk: socket |
| 1361 | */ |
| 1362 | static void tipc_write_space(struct sock *sk) |
| 1363 | { |
| 1364 | struct socket_wq *wq; |
| 1365 | |
| 1366 | rcu_read_lock(); |
| 1367 | wq = rcu_dereference(sk->sk_wq); |
| 1368 | if (wq_has_sleeper(wq)) |
| 1369 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
| 1370 | POLLWRNORM | POLLWRBAND); |
| 1371 | rcu_read_unlock(); |
| 1372 | } |
| 1373 | |
| 1374 | /** |
| 1375 | * tipc_data_ready - wake up threads to indicate messages have been received |
| 1376 | * @sk: socket |
| 1377 | * @len: the length of messages |
| 1378 | */ |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1379 | static void tipc_data_ready(struct sock *sk) |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1380 | { |
| 1381 | struct socket_wq *wq; |
| 1382 | |
| 1383 | rcu_read_lock(); |
| 1384 | wq = rcu_dereference(sk->sk_wq); |
| 1385 | if (wq_has_sleeper(wq)) |
| 1386 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
| 1387 | POLLRDNORM | POLLRDBAND); |
| 1388 | rcu_read_unlock(); |
| 1389 | } |
| 1390 | |
| 1391 | /** |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1392 | * filter_connect - Handle all incoming messages for a connection-based socket |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1393 | * @tsk: TIPC socket |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1394 | * @msg: message |
| 1395 | * |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1396 | * Returns 0 (TIPC_OK) if everyting ok, -TIPC_ERR_NO_PORT otherwise |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1397 | */ |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1398 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **buf) |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1399 | { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1400 | struct sock *sk = &tsk->sk; |
| 1401 | struct tipc_port *port = &tsk->port; |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1402 | struct socket *sock = sk->sk_socket; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1403 | struct tipc_msg *msg = buf_msg(*buf); |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1404 | |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1405 | int retval = -TIPC_ERR_NO_PORT; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1406 | int res; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1407 | |
| 1408 | if (msg_mcast(msg)) |
| 1409 | return retval; |
| 1410 | |
| 1411 | switch ((int)sock->state) { |
| 1412 | case SS_CONNECTED: |
| 1413 | /* Accept only connection-based messages sent by peer */ |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1414 | if (msg_connected(msg) && tipc_port_peer_msg(port, msg)) { |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1415 | if (unlikely(msg_errcode(msg))) { |
| 1416 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1417 | __tipc_port_disconnect(port); |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1418 | } |
| 1419 | retval = TIPC_OK; |
| 1420 | } |
| 1421 | break; |
| 1422 | case SS_CONNECTING: |
| 1423 | /* Accept only ACK or NACK message */ |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1424 | if (unlikely(msg_errcode(msg))) { |
| 1425 | sock->state = SS_DISCONNECTING; |
Erik Hugne | 2c8d851 | 2013-08-28 09:29:58 +0200 | [diff] [blame] | 1426 | sk->sk_err = ECONNREFUSED; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1427 | retval = TIPC_OK; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1428 | break; |
| 1429 | } |
| 1430 | |
| 1431 | if (unlikely(!msg_connected(msg))) |
| 1432 | break; |
| 1433 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1434 | res = auto_connect(tsk, msg); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1435 | if (res) { |
| 1436 | sock->state = SS_DISCONNECTING; |
Erik Hugne | 2c8d851 | 2013-08-28 09:29:58 +0200 | [diff] [blame] | 1437 | sk->sk_err = -res; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1438 | retval = TIPC_OK; |
| 1439 | break; |
| 1440 | } |
| 1441 | |
| 1442 | /* If an incoming message is an 'ACK-', it should be |
| 1443 | * discarded here because it doesn't contain useful |
| 1444 | * data. In addition, we should try to wake up |
| 1445 | * connect() routine if sleeping. |
| 1446 | */ |
| 1447 | if (msg_data_sz(msg) == 0) { |
| 1448 | kfree_skb(*buf); |
| 1449 | *buf = NULL; |
| 1450 | if (waitqueue_active(sk_sleep(sk))) |
| 1451 | wake_up_interruptible(sk_sleep(sk)); |
| 1452 | } |
| 1453 | retval = TIPC_OK; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1454 | break; |
| 1455 | case SS_LISTENING: |
| 1456 | case SS_UNCONNECTED: |
| 1457 | /* Accept only SYN message */ |
| 1458 | if (!msg_connected(msg) && !(msg_errcode(msg))) |
| 1459 | retval = TIPC_OK; |
| 1460 | break; |
| 1461 | case SS_DISCONNECTING: |
| 1462 | break; |
| 1463 | default: |
| 1464 | pr_err("Unknown socket state %u\n", sock->state); |
| 1465 | } |
| 1466 | return retval; |
| 1467 | } |
| 1468 | |
| 1469 | /** |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1470 | * rcvbuf_limit - get proper overload limit of socket receive queue |
| 1471 | * @sk: socket |
| 1472 | * @buf: message |
| 1473 | * |
| 1474 | * For all connection oriented messages, irrespective of importance, |
| 1475 | * the default overload value (i.e. 67MB) is set as limit. |
| 1476 | * |
| 1477 | * For all connectionless messages, by default new queue limits are |
| 1478 | * as belows: |
| 1479 | * |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 1480 | * TIPC_LOW_IMPORTANCE (4 MB) |
| 1481 | * TIPC_MEDIUM_IMPORTANCE (8 MB) |
| 1482 | * TIPC_HIGH_IMPORTANCE (16 MB) |
| 1483 | * TIPC_CRITICAL_IMPORTANCE (32 MB) |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1484 | * |
| 1485 | * Returns overload limit according to corresponding message importance |
| 1486 | */ |
| 1487 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) |
| 1488 | { |
| 1489 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1490 | |
| 1491 | if (msg_connected(msg)) |
wangweidong | 0cee6bb | 2013-12-12 09:36:39 +0800 | [diff] [blame] | 1492 | return sysctl_tipc_rmem[2]; |
| 1493 | |
| 1494 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << |
| 1495 | msg_importance(msg); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1496 | } |
| 1497 | |
| 1498 | /** |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1499 | * filter_rcv - validate incoming message |
| 1500 | * @sk: socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1501 | * @buf: message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1502 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1503 | * Enqueues message on receive queue if acceptable; optionally handles |
| 1504 | * disconnect indication for a connected socket. |
| 1505 | * |
| 1506 | * Called with socket lock already taken; port lock may also be taken. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1507 | * |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1508 | * Returns 0 (TIPC_OK) if message was consumed, -TIPC error code if message |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1509 | * to be rejected, 1 (TIPC_FWD_MSG) if (CONN_MANAGER) message to be forwarded |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1510 | */ |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1511 | static int filter_rcv(struct sock *sk, struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1512 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1513 | struct socket *sock = sk->sk_socket; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1514 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1515 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1516 | unsigned int limit = rcvbuf_limit(sk, buf); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1517 | u32 onode; |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1518 | int rc = TIPC_OK; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1519 | |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1520 | if (unlikely(msg_user(msg) == CONN_MANAGER)) |
| 1521 | return tipc_sk_proto_rcv(tsk, &onode, buf); |
Jon Paul Maloy | ec8a2e5 | 2014-06-25 20:41:40 -0500 | [diff] [blame] | 1522 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame^] | 1523 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
| 1524 | kfree_skb(buf); |
| 1525 | tsk->link_cong = 0; |
| 1526 | sk->sk_write_space(sk); |
| 1527 | return TIPC_OK; |
| 1528 | } |
| 1529 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1530 | /* Reject message if it is wrong sort of message for socket */ |
Allan Stephens | aad5854 | 2012-04-26 18:13:08 -0400 | [diff] [blame] | 1531 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1532 | return -TIPC_ERR_NO_PORT; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1533 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1534 | if (sock->state == SS_READY) { |
Allan Stephens | b29f142 | 2010-12-31 18:59:25 +0000 | [diff] [blame] | 1535 | if (msg_connected(msg)) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1536 | return -TIPC_ERR_NO_PORT; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1537 | } else { |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1538 | rc = filter_connect(tsk, &buf); |
| 1539 | if (rc != TIPC_OK || buf == NULL) |
| 1540 | return rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1541 | } |
| 1542 | |
| 1543 | /* Reject message if there isn't room to queue it */ |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1544 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1545 | return -TIPC_ERR_OVERLOAD; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1546 | |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1547 | /* Enqueue message */ |
Ying Xue | 4068243 | 2013-10-18 07:23:16 +0200 | [diff] [blame] | 1548 | TIPC_SKB_CB(buf)->handle = NULL; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1549 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1550 | skb_set_owner_r(buf, sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1551 | |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1552 | sk->sk_data_ready(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1553 | return TIPC_OK; |
| 1554 | } |
| 1555 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1556 | /** |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1557 | * tipc_backlog_rcv - handle incoming message from backlog queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1558 | * @sk: socket |
| 1559 | * @buf: message |
| 1560 | * |
| 1561 | * Caller must hold socket lock, but not port lock. |
| 1562 | * |
| 1563 | * Returns 0 |
| 1564 | */ |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1565 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1566 | { |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1567 | int rc; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1568 | u32 onode; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1569 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 02c00c2 | 2014-06-09 11:08:18 -0500 | [diff] [blame] | 1570 | uint truesize = buf->truesize; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1571 | |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1572 | rc = filter_rcv(sk, buf); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1573 | |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1574 | if (likely(!rc)) { |
| 1575 | if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT) |
| 1576 | atomic_add(truesize, &tsk->dupl_rcvcnt); |
| 1577 | return 0; |
| 1578 | } |
| 1579 | |
| 1580 | if ((rc < 0) && !tipc_msg_reverse(buf, &onode, -rc)) |
| 1581 | return 0; |
| 1582 | |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1583 | tipc_link_xmit(buf, onode, 0); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1584 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1585 | return 0; |
| 1586 | } |
| 1587 | |
| 1588 | /** |
Jon Paul Maloy | 24be34b | 2014-03-12 11:31:10 -0400 | [diff] [blame] | 1589 | * tipc_sk_rcv - handle incoming message |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1590 | * @buf: buffer containing arriving message |
| 1591 | * Consumes buffer |
| 1592 | * Returns 0 if success, or errno: -EHOSTUNREACH |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1593 | */ |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1594 | int tipc_sk_rcv(struct sk_buff *buf) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1595 | { |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1596 | struct tipc_sock *tsk; |
| 1597 | struct tipc_port *port; |
| 1598 | struct sock *sk; |
| 1599 | u32 dport = msg_destport(buf_msg(buf)); |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1600 | int rc = TIPC_OK; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1601 | uint limit; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1602 | u32 dnode; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1603 | |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1604 | /* Validate destination and message */ |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1605 | port = tipc_port_lock(dport); |
| 1606 | if (unlikely(!port)) { |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1607 | rc = tipc_msg_eval(buf, &dnode); |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1608 | goto exit; |
| 1609 | } |
| 1610 | |
| 1611 | tsk = tipc_port_to_sock(port); |
| 1612 | sk = &tsk->sk; |
| 1613 | |
| 1614 | /* Queue message */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1615 | bh_lock_sock(sk); |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1616 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1617 | if (!sock_owned_by_user(sk)) { |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1618 | rc = filter_rcv(sk, buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1619 | } else { |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1620 | if (sk->sk_backlog.len == 0) |
| 1621 | atomic_set(&tsk->dupl_rcvcnt, 0); |
| 1622 | limit = rcvbuf_limit(sk, buf) + atomic_read(&tsk->dupl_rcvcnt); |
| 1623 | if (sk_add_backlog(sk, buf, limit)) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1624 | rc = -TIPC_ERR_OVERLOAD; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1625 | } |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1626 | bh_unlock_sock(sk); |
| 1627 | tipc_port_unlock(port); |
| 1628 | |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1629 | if (likely(!rc)) |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1630 | return 0; |
| 1631 | exit: |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1632 | if ((rc < 0) && !tipc_msg_reverse(buf, &dnode, -rc)) |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1633 | return -EHOSTUNREACH; |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1634 | |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1635 | tipc_link_xmit(buf, dnode, 0); |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1636 | return (rc < 0) ? -EHOSTUNREACH : 0; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1637 | } |
| 1638 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1639 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
| 1640 | { |
| 1641 | struct sock *sk = sock->sk; |
| 1642 | DEFINE_WAIT(wait); |
| 1643 | int done; |
| 1644 | |
| 1645 | do { |
| 1646 | int err = sock_error(sk); |
| 1647 | if (err) |
| 1648 | return err; |
| 1649 | if (!*timeo_p) |
| 1650 | return -ETIMEDOUT; |
| 1651 | if (signal_pending(current)) |
| 1652 | return sock_intr_errno(*timeo_p); |
| 1653 | |
| 1654 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
| 1655 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); |
| 1656 | finish_wait(sk_sleep(sk), &wait); |
| 1657 | } while (!done); |
| 1658 | return 0; |
| 1659 | } |
| 1660 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1661 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1662 | * tipc_connect - establish a connection to another TIPC port |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1663 | * @sock: socket structure |
| 1664 | * @dest: socket address for destination port |
| 1665 | * @destlen: size of socket address data structure |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1666 | * @flags: file-related flags associated with socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1667 | * |
| 1668 | * Returns 0 on success, errno otherwise |
| 1669 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1670 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
| 1671 | int destlen, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1672 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1673 | struct sock *sk = sock->sk; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1674 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
| 1675 | struct msghdr m = {NULL,}; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1676 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
| 1677 | socket_state previous; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1678 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1679 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1680 | lock_sock(sk); |
| 1681 | |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1682 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1683 | if (sock->state == SS_READY) { |
| 1684 | res = -EOPNOTSUPP; |
| 1685 | goto exit; |
| 1686 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1687 | |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1688 | /* |
| 1689 | * Reject connection attempt using multicast address |
| 1690 | * |
| 1691 | * Note: send_msg() validates the rest of the address fields, |
| 1692 | * so there's no need to do it here |
| 1693 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1694 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
| 1695 | res = -EINVAL; |
| 1696 | goto exit; |
| 1697 | } |
| 1698 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1699 | previous = sock->state; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1700 | switch (sock->state) { |
| 1701 | case SS_UNCONNECTED: |
| 1702 | /* Send a 'SYN-' to destination */ |
| 1703 | m.msg_name = dest; |
| 1704 | m.msg_namelen = destlen; |
| 1705 | |
| 1706 | /* If connect is in non-blocking case, set MSG_DONTWAIT to |
| 1707 | * indicate send_msg() is never blocked. |
| 1708 | */ |
| 1709 | if (!timeout) |
| 1710 | m.msg_flags = MSG_DONTWAIT; |
| 1711 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1712 | res = tipc_sendmsg(NULL, sock, &m, 0); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1713 | if ((res < 0) && (res != -EWOULDBLOCK)) |
| 1714 | goto exit; |
| 1715 | |
| 1716 | /* Just entered SS_CONNECTING state; the only |
| 1717 | * difference is that return value in non-blocking |
| 1718 | * case is EINPROGRESS, rather than EALREADY. |
| 1719 | */ |
| 1720 | res = -EINPROGRESS; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1721 | case SS_CONNECTING: |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1722 | if (previous == SS_CONNECTING) |
| 1723 | res = -EALREADY; |
| 1724 | if (!timeout) |
| 1725 | goto exit; |
| 1726 | timeout = msecs_to_jiffies(timeout); |
| 1727 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ |
| 1728 | res = tipc_wait_for_connect(sock, &timeout); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1729 | break; |
| 1730 | case SS_CONNECTED: |
| 1731 | res = -EISCONN; |
| 1732 | break; |
| 1733 | default: |
| 1734 | res = -EINVAL; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1735 | break; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1736 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1737 | exit: |
| 1738 | release_sock(sk); |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1739 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1740 | } |
| 1741 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1742 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1743 | * tipc_listen - allow socket to listen for incoming connections |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1744 | * @sock: socket structure |
| 1745 | * @len: (unused) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1746 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1747 | * Returns 0 on success, errno otherwise |
| 1748 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1749 | static int tipc_listen(struct socket *sock, int len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1750 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1751 | struct sock *sk = sock->sk; |
| 1752 | int res; |
| 1753 | |
| 1754 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1755 | |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 1756 | if (sock->state != SS_UNCONNECTED) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1757 | res = -EINVAL; |
| 1758 | else { |
| 1759 | sock->state = SS_LISTENING; |
| 1760 | res = 0; |
| 1761 | } |
| 1762 | |
| 1763 | release_sock(sk); |
| 1764 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1765 | } |
| 1766 | |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1767 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
| 1768 | { |
| 1769 | struct sock *sk = sock->sk; |
| 1770 | DEFINE_WAIT(wait); |
| 1771 | int err; |
| 1772 | |
| 1773 | /* True wake-one mechanism for incoming connections: only |
| 1774 | * one process gets woken up, not the 'whole herd'. |
| 1775 | * Since we do not 'race & poll' for established sockets |
| 1776 | * anymore, the common case will execute the loop only once. |
| 1777 | */ |
| 1778 | for (;;) { |
| 1779 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, |
| 1780 | TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 1781 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1782 | release_sock(sk); |
| 1783 | timeo = schedule_timeout(timeo); |
| 1784 | lock_sock(sk); |
| 1785 | } |
| 1786 | err = 0; |
| 1787 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 1788 | break; |
| 1789 | err = -EINVAL; |
| 1790 | if (sock->state != SS_LISTENING) |
| 1791 | break; |
| 1792 | err = sock_intr_errno(timeo); |
| 1793 | if (signal_pending(current)) |
| 1794 | break; |
| 1795 | err = -EAGAIN; |
| 1796 | if (!timeo) |
| 1797 | break; |
| 1798 | } |
| 1799 | finish_wait(sk_sleep(sk), &wait); |
| 1800 | return err; |
| 1801 | } |
| 1802 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1803 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1804 | * tipc_accept - wait for connection request |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1805 | * @sock: listening socket |
| 1806 | * @newsock: new socket that is to be connected |
| 1807 | * @flags: file-related flags associated with socket |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1808 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1809 | * Returns 0 on success, errno otherwise |
| 1810 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1811 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1812 | { |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1813 | struct sock *new_sk, *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1814 | struct sk_buff *buf; |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1815 | struct tipc_port *new_port; |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1816 | struct tipc_msg *msg; |
Jon Paul Maloy | f9fef18 | 2014-03-12 11:31:08 -0400 | [diff] [blame] | 1817 | struct tipc_portid peer; |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1818 | u32 new_ref; |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1819 | long timeo; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1820 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1821 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1822 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1823 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1824 | if (sock->state != SS_LISTENING) { |
| 1825 | res = -EINVAL; |
| 1826 | goto exit; |
| 1827 | } |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1828 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 1829 | res = tipc_wait_for_accept(sock, timeo); |
| 1830 | if (res) |
| 1831 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1832 | |
| 1833 | buf = skb_peek(&sk->sk_receive_queue); |
| 1834 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 1835 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1836 | if (res) |
| 1837 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1838 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1839 | new_sk = new_sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1840 | new_port = &tipc_sk(new_sk)->port; |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1841 | new_ref = new_port->ref; |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1842 | msg = buf_msg(buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1843 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1844 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
| 1845 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1846 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1847 | /* |
| 1848 | * Reject any stray messages received by new socket |
| 1849 | * before the socket lock was taken (very, very unlikely) |
| 1850 | */ |
| 1851 | reject_rx_queue(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1852 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1853 | /* Connect new socket to it's peer */ |
Jon Paul Maloy | f9fef18 | 2014-03-12 11:31:08 -0400 | [diff] [blame] | 1854 | peer.ref = msg_origport(msg); |
| 1855 | peer.node = msg_orignode(msg); |
| 1856 | tipc_port_connect(new_ref, &peer); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1857 | new_sock->state = SS_CONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1858 | |
Jon Paul Maloy | 3b4f302 | 2014-03-12 11:31:11 -0400 | [diff] [blame] | 1859 | tipc_port_set_importance(new_port, msg_importance(msg)); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1860 | if (msg_named(msg)) { |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1861 | new_port->conn_type = msg_nametype(msg); |
| 1862 | new_port->conn_instance = msg_nameinst(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1863 | } |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1864 | |
| 1865 | /* |
| 1866 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. |
| 1867 | * Respond to 'SYN+' by queuing it on new socket. |
| 1868 | */ |
| 1869 | if (!msg_data_sz(msg)) { |
| 1870 | struct msghdr m = {NULL,}; |
| 1871 | |
| 1872 | advance_rx_queue(sk); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1873 | tipc_send_packet(NULL, new_sock, &m, 0); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1874 | } else { |
| 1875 | __skb_dequeue(&sk->sk_receive_queue); |
| 1876 | __skb_queue_head(&new_sk->sk_receive_queue, buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1877 | skb_set_owner_r(buf, new_sk); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1878 | } |
| 1879 | release_sock(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1880 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1881 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1882 | return res; |
| 1883 | } |
| 1884 | |
| 1885 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1886 | * tipc_shutdown - shutdown socket connection |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1887 | * @sock: socket structure |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 1888 | * @how: direction to close (must be SHUT_RDWR) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1889 | * |
| 1890 | * Terminates connection (if necessary), then purges socket's receive queue. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1891 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1892 | * Returns 0 on success, errno otherwise |
| 1893 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1894 | static int tipc_shutdown(struct socket *sock, int how) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1895 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1896 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1897 | struct tipc_sock *tsk = tipc_sk(sk); |
| 1898 | struct tipc_port *port = &tsk->port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1899 | struct sk_buff *buf; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1900 | u32 peer; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1901 | int res; |
| 1902 | |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 1903 | if (how != SHUT_RDWR) |
| 1904 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1905 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1906 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1907 | |
| 1908 | switch (sock->state) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1909 | case SS_CONNECTING: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1910 | case SS_CONNECTED: |
| 1911 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1912 | restart: |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 1913 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1914 | buf = __skb_dequeue(&sk->sk_receive_queue); |
| 1915 | if (buf) { |
Ying Xue | 4068243 | 2013-10-18 07:23:16 +0200 | [diff] [blame] | 1916 | if (TIPC_SKB_CB(buf)->handle != NULL) { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1917 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1918 | goto restart; |
| 1919 | } |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1920 | tipc_port_disconnect(port->ref); |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1921 | if (tipc_msg_reverse(buf, &peer, TIPC_CONN_SHUTDOWN)) |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1922 | tipc_link_xmit(buf, peer, 0); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1923 | } else { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1924 | tipc_port_shutdown(port->ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1925 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1926 | |
| 1927 | sock->state = SS_DISCONNECTING; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1928 | |
| 1929 | /* fall through */ |
| 1930 | |
| 1931 | case SS_DISCONNECTING: |
| 1932 | |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 1933 | /* Discard any unreceived messages */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 1934 | __skb_queue_purge(&sk->sk_receive_queue); |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 1935 | |
| 1936 | /* Wake up anyone sleeping in poll */ |
| 1937 | sk->sk_state_change(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1938 | res = 0; |
| 1939 | break; |
| 1940 | |
| 1941 | default: |
| 1942 | res = -ENOTCONN; |
| 1943 | } |
| 1944 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1945 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1946 | return res; |
| 1947 | } |
| 1948 | |
| 1949 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1950 | * tipc_setsockopt - set socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1951 | * @sock: socket structure |
| 1952 | * @lvl: option level |
| 1953 | * @opt: option identifier |
| 1954 | * @ov: pointer to new option value |
| 1955 | * @ol: length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1956 | * |
| 1957 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1958 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1959 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1960 | * Returns 0 on success, errno otherwise |
| 1961 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1962 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
| 1963 | char __user *ov, unsigned int ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1964 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1965 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1966 | struct tipc_sock *tsk = tipc_sk(sk); |
| 1967 | struct tipc_port *port = &tsk->port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1968 | u32 value; |
| 1969 | int res; |
| 1970 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1971 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 1972 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1973 | if (lvl != SOL_TIPC) |
| 1974 | return -ENOPROTOOPT; |
| 1975 | if (ol < sizeof(value)) |
| 1976 | return -EINVAL; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1977 | res = get_user(value, (u32 __user *)ov); |
| 1978 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1979 | return res; |
| 1980 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1981 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1982 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1983 | switch (opt) { |
| 1984 | case TIPC_IMPORTANCE: |
Erik Hugne | ac32c7f | 2014-08-15 16:44:35 +0200 | [diff] [blame] | 1985 | res = tipc_port_set_importance(port, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1986 | break; |
| 1987 | case TIPC_SRC_DROPPABLE: |
| 1988 | if (sock->type != SOCK_STREAM) |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1989 | tipc_port_set_unreliable(port, value); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1990 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1991 | res = -ENOPROTOOPT; |
| 1992 | break; |
| 1993 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1994 | tipc_port_set_unreturnable(port, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1995 | break; |
| 1996 | case TIPC_CONN_TIMEOUT: |
Allan Stephens | a0f40f0 | 2011-05-26 13:44:34 -0400 | [diff] [blame] | 1997 | tipc_sk(sk)->conn_timeout = value; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1998 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1999 | break; |
| 2000 | default: |
| 2001 | res = -EINVAL; |
| 2002 | } |
| 2003 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2004 | release_sock(sk); |
| 2005 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2006 | return res; |
| 2007 | } |
| 2008 | |
| 2009 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2010 | * tipc_getsockopt - get socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2011 | * @sock: socket structure |
| 2012 | * @lvl: option level |
| 2013 | * @opt: option identifier |
| 2014 | * @ov: receptacle for option value |
| 2015 | * @ol: receptacle for length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2016 | * |
| 2017 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2018 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2019 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2020 | * Returns 0 on success, errno otherwise |
| 2021 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2022 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
| 2023 | char __user *ov, int __user *ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2024 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2025 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2026 | struct tipc_sock *tsk = tipc_sk(sk); |
| 2027 | struct tipc_port *port = &tsk->port; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2028 | int len; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2029 | u32 value; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2030 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2031 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2032 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 2033 | return put_user(0, ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2034 | if (lvl != SOL_TIPC) |
| 2035 | return -ENOPROTOOPT; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 2036 | res = get_user(len, ol); |
| 2037 | if (res) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2038 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2039 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2040 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2041 | |
| 2042 | switch (opt) { |
| 2043 | case TIPC_IMPORTANCE: |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2044 | value = tipc_port_importance(port); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2045 | break; |
| 2046 | case TIPC_SRC_DROPPABLE: |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2047 | value = tipc_port_unreliable(port); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2048 | break; |
| 2049 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2050 | value = tipc_port_unreturnable(port); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2051 | break; |
| 2052 | case TIPC_CONN_TIMEOUT: |
Allan Stephens | a0f40f0 | 2011-05-26 13:44:34 -0400 | [diff] [blame] | 2053 | value = tipc_sk(sk)->conn_timeout; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2054 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2055 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2056 | case TIPC_NODE_RECVQ_DEPTH: |
Ying Xue | 9da3d47 | 2012-11-27 06:15:27 -0500 | [diff] [blame] | 2057 | value = 0; /* was tipc_queue_size, now obsolete */ |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2058 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2059 | case TIPC_SOCK_RECVQ_DEPTH: |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2060 | value = skb_queue_len(&sk->sk_receive_queue); |
| 2061 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2062 | default: |
| 2063 | res = -EINVAL; |
| 2064 | } |
| 2065 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2066 | release_sock(sk); |
| 2067 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2068 | if (res) |
| 2069 | return res; /* "get" failed */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2070 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2071 | if (len < sizeof(value)) |
| 2072 | return -EINVAL; |
| 2073 | |
| 2074 | if (copy_to_user(ov, &value, sizeof(value))) |
| 2075 | return -EFAULT; |
| 2076 | |
| 2077 | return put_user(sizeof(value), ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2078 | } |
| 2079 | |
Wei Yongjun | 52f50ce | 2014-07-20 13:14:28 +0800 | [diff] [blame] | 2080 | static int tipc_ioctl(struct socket *sk, unsigned int cmd, unsigned long arg) |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2081 | { |
| 2082 | struct tipc_sioc_ln_req lnr; |
| 2083 | void __user *argp = (void __user *)arg; |
| 2084 | |
| 2085 | switch (cmd) { |
| 2086 | case SIOCGETLINKNAME: |
| 2087 | if (copy_from_user(&lnr, argp, sizeof(lnr))) |
| 2088 | return -EFAULT; |
| 2089 | if (!tipc_node_get_linkname(lnr.bearer_id, lnr.peer, |
| 2090 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
| 2091 | if (copy_to_user(argp, &lnr, sizeof(lnr))) |
| 2092 | return -EFAULT; |
| 2093 | return 0; |
| 2094 | } |
| 2095 | return -EADDRNOTAVAIL; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2096 | default: |
| 2097 | return -ENOIOCTLCMD; |
| 2098 | } |
| 2099 | } |
| 2100 | |
Ben Hutchings | ae86b9e | 2012-07-10 10:55:35 +0000 | [diff] [blame] | 2101 | /* Protocol switches for the various types of TIPC sockets */ |
| 2102 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2103 | static const struct proto_ops msg_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2104 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2105 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2106 | .release = tipc_release, |
| 2107 | .bind = tipc_bind, |
| 2108 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2109 | .socketpair = sock_no_socketpair, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2110 | .accept = sock_no_accept, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2111 | .getname = tipc_getname, |
| 2112 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2113 | .ioctl = tipc_ioctl, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2114 | .listen = sock_no_listen, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2115 | .shutdown = tipc_shutdown, |
| 2116 | .setsockopt = tipc_setsockopt, |
| 2117 | .getsockopt = tipc_getsockopt, |
| 2118 | .sendmsg = tipc_sendmsg, |
| 2119 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2120 | .mmap = sock_no_mmap, |
| 2121 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2122 | }; |
| 2123 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2124 | static const struct proto_ops packet_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2125 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2126 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2127 | .release = tipc_release, |
| 2128 | .bind = tipc_bind, |
| 2129 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2130 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2131 | .accept = tipc_accept, |
| 2132 | .getname = tipc_getname, |
| 2133 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2134 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2135 | .listen = tipc_listen, |
| 2136 | .shutdown = tipc_shutdown, |
| 2137 | .setsockopt = tipc_setsockopt, |
| 2138 | .getsockopt = tipc_getsockopt, |
| 2139 | .sendmsg = tipc_send_packet, |
| 2140 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2141 | .mmap = sock_no_mmap, |
| 2142 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2143 | }; |
| 2144 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2145 | static const struct proto_ops stream_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2146 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2147 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2148 | .release = tipc_release, |
| 2149 | .bind = tipc_bind, |
| 2150 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2151 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2152 | .accept = tipc_accept, |
| 2153 | .getname = tipc_getname, |
| 2154 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2155 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2156 | .listen = tipc_listen, |
| 2157 | .shutdown = tipc_shutdown, |
| 2158 | .setsockopt = tipc_setsockopt, |
| 2159 | .getsockopt = tipc_getsockopt, |
| 2160 | .sendmsg = tipc_send_stream, |
| 2161 | .recvmsg = tipc_recv_stream, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2162 | .mmap = sock_no_mmap, |
| 2163 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2164 | }; |
| 2165 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2166 | static const struct net_proto_family tipc_family_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2167 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2168 | .family = AF_TIPC, |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2169 | .create = tipc_sk_create |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2170 | }; |
| 2171 | |
| 2172 | static struct proto tipc_proto = { |
| 2173 | .name = "TIPC", |
| 2174 | .owner = THIS_MODULE, |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 2175 | .obj_size = sizeof(struct tipc_sock), |
| 2176 | .sysctl_rmem = sysctl_tipc_rmem |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2177 | }; |
| 2178 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2179 | static struct proto tipc_proto_kern = { |
| 2180 | .name = "TIPC", |
| 2181 | .obj_size = sizeof(struct tipc_sock), |
| 2182 | .sysctl_rmem = sysctl_tipc_rmem |
| 2183 | }; |
| 2184 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2185 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2186 | * tipc_socket_init - initialize TIPC socket interface |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2187 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2188 | * Returns 0 on success, errno otherwise |
| 2189 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2190 | int tipc_socket_init(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2191 | { |
| 2192 | int res; |
| 2193 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2194 | res = proto_register(&tipc_proto, 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2195 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2196 | pr_err("Failed to register TIPC protocol type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2197 | goto out; |
| 2198 | } |
| 2199 | |
| 2200 | res = sock_register(&tipc_family_ops); |
| 2201 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2202 | pr_err("Failed to register TIPC socket type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2203 | proto_unregister(&tipc_proto); |
| 2204 | goto out; |
| 2205 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2206 | out: |
| 2207 | return res; |
| 2208 | } |
| 2209 | |
| 2210 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2211 | * tipc_socket_stop - stop TIPC socket interface |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2212 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2213 | void tipc_socket_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2214 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2215 | sock_unregister(tipc_family_ops.family); |
| 2216 | proto_unregister(&tipc_proto); |
| 2217 | } |