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> |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame^] | 43 | #include "config.h" |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 44 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 45 | #define SS_LISTENING -1 /* socket is listening */ |
| 46 | #define SS_READY -2 /* socket is connectionless */ |
| 47 | |
Allan Stephens | 3654ea0 | 2008-04-13 21:35:11 -0700 | [diff] [blame] | 48 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 49 | #define CONN_PROBING_INTERVAL 3600000 /* [ms] => 1 h */ |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 50 | #define TIPC_FWD_MSG 1 |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 51 | |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 52 | 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] | 53 | static void tipc_data_ready(struct sock *sk); |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 54 | static void tipc_write_space(struct sock *sk); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 55 | static int tipc_release(struct socket *sock); |
| 56 | 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] | 57 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 58 | static void tipc_sk_timeout(unsigned long ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 59 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 60 | static const struct proto_ops packet_ops; |
| 61 | static const struct proto_ops stream_ops; |
| 62 | static const struct proto_ops msg_ops; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 63 | |
| 64 | static struct proto tipc_proto; |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 65 | static struct proto tipc_proto_kern; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 66 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 67 | /* |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 68 | * Revised TIPC socket locking policy: |
| 69 | * |
| 70 | * Most socket operations take the standard socket lock when they start |
| 71 | * and hold it until they finish (or until they need to sleep). Acquiring |
| 72 | * this lock grants the owner exclusive access to the fields of the socket |
| 73 | * data structures, with the exception of the backlog queue. A few socket |
| 74 | * operations can be done without taking the socket lock because they only |
| 75 | * read socket information that never changes during the life of the socket. |
| 76 | * |
| 77 | * Socket operations may acquire the lock for the associated TIPC port if they |
| 78 | * need to perform an operation on the port. If any routine needs to acquire |
| 79 | * both the socket lock and the port lock it must take the socket lock first |
| 80 | * to avoid the risk of deadlock. |
| 81 | * |
| 82 | * The dispatcher handling incoming messages cannot grab the socket lock in |
| 83 | * the standard fashion, since invoked it runs at the BH level and cannot block. |
| 84 | * Instead, it checks to see if the socket lock is currently owned by someone, |
| 85 | * and either handles the message itself or adds it to the socket's backlog |
| 86 | * queue; in the latter case the queued message is processed once the process |
| 87 | * owning the socket lock releases it. |
| 88 | * |
| 89 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes |
| 90 | * the problem of a blocked socket operation preventing any other operations |
| 91 | * from occurring. However, applications must be careful if they have |
| 92 | * multiple threads trying to send (or receive) on the same socket, as these |
| 93 | * operations might interfere with each other. For example, doing a connect |
| 94 | * and a receive at the same time might allow the receive to consume the |
| 95 | * ACK message meant for the connect. While additional work could be done |
| 96 | * to try and overcome this, it doesn't seem to be worthwhile at the present. |
| 97 | * |
| 98 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures |
| 99 | * that another operation that must be performed in a non-blocking manner is |
| 100 | * not delayed for very long because the lock has already been taken. |
| 101 | * |
| 102 | * NOTE: This code assumes that certain fields of a port/socket pair are |
| 103 | * constant over its lifetime; such fields can be examined without taking |
| 104 | * the socket lock and/or port lock, and do not need to be re-read even |
| 105 | * after resuming processing after waiting. These fields include: |
| 106 | * - socket type |
| 107 | * - pointer to socket sk structure (aka tipc_sock structure) |
| 108 | * - pointer to port structure |
| 109 | * - port reference |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 110 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 111 | |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 112 | #include "socket.h" |
| 113 | |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame^] | 114 | /* tipc_sk_lock_next: find & lock next socket in registry from given port number |
| 115 | */ |
| 116 | static struct tipc_sock *tipc_sk_lock_next(u32 *ref) |
| 117 | { |
| 118 | struct tipc_port *port = (struct tipc_port *)tipc_ref_lock_next(ref); |
| 119 | |
| 120 | if (!port) |
| 121 | return NULL; |
| 122 | return tipc_port_to_sock(port); |
| 123 | } |
| 124 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 125 | /** |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 126 | * advance_rx_queue - discard first buffer in socket receive queue |
| 127 | * |
| 128 | * Caller must hold socket lock |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 129 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 130 | static void advance_rx_queue(struct sock *sk) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 131 | { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 132 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | /** |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 136 | * reject_rx_queue - reject all buffers in socket receive queue |
| 137 | * |
| 138 | * Caller must hold socket lock |
| 139 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 140 | static void reject_rx_queue(struct sock *sk) |
| 141 | { |
| 142 | struct sk_buff *buf; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 143 | u32 dnode; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 144 | |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 145 | while ((buf = __skb_dequeue(&sk->sk_receive_queue))) { |
| 146 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 147 | tipc_link_xmit(buf, dnode, 0); |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 148 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | /** |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 152 | * tipc_sk_create - create a TIPC socket |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 153 | * @net: network namespace (must be default network) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 154 | * @sock: pre-allocated socket structure |
| 155 | * @protocol: protocol indicator (must be 0) |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 156 | * @kern: caused by kernel or by userspace? |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 157 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 158 | * This routine creates additional data structures used by the TIPC socket, |
| 159 | * initializes them, and links them together. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 160 | * |
| 161 | * Returns 0 on success, errno otherwise |
| 162 | */ |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 163 | static int tipc_sk_create(struct net *net, struct socket *sock, |
| 164 | int protocol, int kern) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 165 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 166 | const struct proto_ops *ops; |
| 167 | socket_state state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 168 | struct sock *sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 169 | struct tipc_sock *tsk; |
| 170 | struct tipc_port *port; |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 171 | struct tipc_msg *msg; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 172 | u32 ref; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 173 | |
| 174 | /* Validate arguments */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 175 | if (unlikely(protocol != 0)) |
| 176 | return -EPROTONOSUPPORT; |
| 177 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 178 | switch (sock->type) { |
| 179 | case SOCK_STREAM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 180 | ops = &stream_ops; |
| 181 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 182 | break; |
| 183 | case SOCK_SEQPACKET: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 184 | ops = &packet_ops; |
| 185 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 186 | break; |
| 187 | case SOCK_DGRAM: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 188 | case SOCK_RDM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 189 | ops = &msg_ops; |
| 190 | state = SS_READY; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 191 | break; |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 192 | default: |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 193 | return -EPROTOTYPE; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 194 | } |
| 195 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 196 | /* Allocate socket's protocol area */ |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 197 | if (!kern) |
| 198 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); |
| 199 | else |
| 200 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); |
| 201 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 202 | if (sk == NULL) |
| 203 | return -ENOMEM; |
| 204 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 205 | tsk = tipc_sk(sk); |
| 206 | port = &tsk->port; |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 207 | ref = tipc_ref_acquire(port, &port->lock); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 208 | if (!ref) { |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 209 | pr_warn("Socket create failed; reference table exhausted\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 210 | return -ENOMEM; |
| 211 | } |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 212 | port->max_pkt = MAX_PKT_DEFAULT; |
| 213 | port->ref = ref; |
| 214 | INIT_LIST_HEAD(&port->publications); |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 215 | |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 216 | msg = &port->phdr; |
| 217 | tipc_msg_init(msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, |
| 218 | NAMED_H_SIZE, 0); |
| 219 | msg_set_origport(msg, ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 220 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 221 | /* Finish initializing socket data structures */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 222 | sock->ops = ops; |
| 223 | sock->state = state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 224 | sock_init_data(sock, sk); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 225 | k_init_timer(&port->timer, (Handler)tipc_sk_timeout, ref); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 226 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 227 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 228 | sk->sk_data_ready = tipc_data_ready; |
| 229 | sk->sk_write_space = tipc_write_space; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 230 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 231 | tsk->sent_unacked = 0; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 232 | atomic_set(&tsk->dupl_rcvcnt, 0); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 233 | tipc_port_unlock(port); |
Allan Stephens | 7ef43eb | 2008-05-12 15:42:28 -0700 | [diff] [blame] | 234 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 235 | if (sock->state == SS_READY) { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 236 | tipc_port_set_unreturnable(port, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 237 | if (sock->type == SOCK_DGRAM) |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 238 | tipc_port_set_unreliable(port, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 239 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | /** |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 244 | * tipc_sock_create_local - create TIPC socket from inside TIPC module |
| 245 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET |
| 246 | * |
| 247 | * We cannot use sock_creat_kern here because it bumps module user count. |
| 248 | * Since socket owner and creator is the same module we must make sure |
| 249 | * that module count remains zero for module local sockets, otherwise |
| 250 | * we cannot do rmmod. |
| 251 | * |
| 252 | * Returns 0 on success, errno otherwise |
| 253 | */ |
| 254 | int tipc_sock_create_local(int type, struct socket **res) |
| 255 | { |
| 256 | int rc; |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 257 | |
| 258 | rc = sock_create_lite(AF_TIPC, type, 0, res); |
| 259 | if (rc < 0) { |
| 260 | pr_err("Failed to create kernel socket\n"); |
| 261 | return rc; |
| 262 | } |
| 263 | tipc_sk_create(&init_net, *res, 0, 1); |
| 264 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * tipc_sock_release_local - release socket created by tipc_sock_create_local |
| 270 | * @sock: the socket to be released. |
| 271 | * |
| 272 | * Module reference count is not incremented when such sockets are created, |
| 273 | * so we must keep it from being decremented when they are released. |
| 274 | */ |
| 275 | void tipc_sock_release_local(struct socket *sock) |
| 276 | { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 277 | tipc_release(sock); |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 278 | sock->ops = NULL; |
| 279 | sock_release(sock); |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * tipc_sock_accept_local - accept a connection on a socket created |
| 284 | * with tipc_sock_create_local. Use this function to avoid that |
| 285 | * module reference count is inadvertently incremented. |
| 286 | * |
| 287 | * @sock: the accepting socket |
| 288 | * @newsock: reference to the new socket to be created |
| 289 | * @flags: socket flags |
| 290 | */ |
| 291 | |
| 292 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 293 | int flags) |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 294 | { |
| 295 | struct sock *sk = sock->sk; |
| 296 | int ret; |
| 297 | |
| 298 | ret = sock_create_lite(sk->sk_family, sk->sk_type, |
| 299 | sk->sk_protocol, newsock); |
| 300 | if (ret < 0) |
| 301 | return ret; |
| 302 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 303 | ret = tipc_accept(sock, *newsock, flags); |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 304 | if (ret < 0) { |
| 305 | sock_release(*newsock); |
| 306 | return ret; |
| 307 | } |
| 308 | (*newsock)->ops = sock->ops; |
| 309 | return ret; |
| 310 | } |
| 311 | |
| 312 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 313 | * tipc_release - destroy a TIPC socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 314 | * @sock: socket to destroy |
| 315 | * |
| 316 | * This routine cleans up any messages that are still queued on the socket. |
| 317 | * For DGRAM and RDM socket types, all queued messages are rejected. |
| 318 | * For SEQPACKET and STREAM socket types, the first message is rejected |
| 319 | * and any others are discarded. (If the first message on a STREAM socket |
| 320 | * 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] | 321 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 322 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
| 323 | * are returned or discarded according to the "destination droppable" setting |
| 324 | * specified for the message by the sender. |
| 325 | * |
| 326 | * Returns 0 on success, errno otherwise |
| 327 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 328 | static int tipc_release(struct socket *sock) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 329 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 330 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 331 | struct tipc_sock *tsk; |
| 332 | struct tipc_port *port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 333 | struct sk_buff *buf; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 334 | u32 dnode; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 335 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 336 | /* |
| 337 | * Exit if socket isn't fully initialized (occurs when a failed accept() |
| 338 | * releases a pre-allocated child socket that was never used) |
| 339 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 340 | if (sk == NULL) |
| 341 | return 0; |
| 342 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 343 | tsk = tipc_sk(sk); |
| 344 | port = &tsk->port; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 345 | lock_sock(sk); |
| 346 | |
| 347 | /* |
| 348 | * Reject all unreceived messages, except on an active connection |
| 349 | * (which disconnects locally & sends a 'FIN+' to peer) |
| 350 | */ |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 351 | dnode = tipc_port_peernode(port); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 352 | while (sock->state != SS_DISCONNECTING) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 353 | buf = __skb_dequeue(&sk->sk_receive_queue); |
| 354 | if (buf == NULL) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 355 | break; |
Ying Xue | 4068243 | 2013-10-18 07:23:16 +0200 | [diff] [blame] | 356 | if (TIPC_SKB_CB(buf)->handle != NULL) |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 357 | kfree_skb(buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 358 | else { |
| 359 | if ((sock->state == SS_CONNECTING) || |
| 360 | (sock->state == SS_CONNECTED)) { |
| 361 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 362 | port->connected = 0; |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 363 | tipc_node_remove_conn(dnode, port->ref); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 364 | } |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 365 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 366 | tipc_link_xmit(buf, dnode, 0); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 367 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 368 | } |
| 369 | |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 370 | tipc_withdraw(port, 0, NULL); |
| 371 | spin_lock_bh(port->lock); |
| 372 | tipc_ref_discard(port->ref); |
| 373 | spin_unlock_bh(port->lock); |
| 374 | k_cancel_timer(&port->timer); |
| 375 | if (port->connected) { |
| 376 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, |
| 377 | SHORT_H_SIZE, 0, dnode, tipc_own_addr, |
| 378 | tipc_port_peerport(port), |
| 379 | port->ref, TIPC_ERR_NO_PORT); |
| 380 | if (buf) |
| 381 | tipc_link_xmit(buf, dnode, port->ref); |
| 382 | tipc_node_remove_conn(dnode, port->ref); |
| 383 | } |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 384 | k_term_timer(&port->timer); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 385 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 386 | /* Discard any remaining (connection-based) messages in receive queue */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 387 | __skb_queue_purge(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 388 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 389 | /* Reject any messages that accumulated in backlog queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 390 | sock->state = SS_DISCONNECTING; |
| 391 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 392 | sock_put(sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 393 | sock->sk = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 394 | |
Geert Uytterhoeven | 065d7e3 | 2014-04-06 15:56:14 +0200 | [diff] [blame] | 395 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 399 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 400 | * @sock: socket structure |
| 401 | * @uaddr: socket address describing name(s) and desired operation |
| 402 | * @uaddr_len: size of socket address data structure |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 403 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 404 | * Name and name sequence binding is indicated using a positive scope value; |
| 405 | * a negative scope value unbinds the specified name. Specifying no name |
| 406 | * (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] | 407 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 408 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 409 | * |
| 410 | * NOTE: This routine doesn't need to take the socket lock since it doesn't |
| 411 | * access any non-constant socket information. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 412 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 413 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
| 414 | int uaddr_len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 415 | { |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 416 | struct sock *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 417 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 418 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 419 | int res = -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 420 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 421 | lock_sock(sk); |
| 422 | if (unlikely(!uaddr_len)) { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 423 | res = tipc_withdraw(&tsk->port, 0, NULL); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 424 | goto exit; |
| 425 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 426 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 427 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
| 428 | res = -EINVAL; |
| 429 | goto exit; |
| 430 | } |
| 431 | if (addr->family != AF_TIPC) { |
| 432 | res = -EAFNOSUPPORT; |
| 433 | goto exit; |
| 434 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 435 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 436 | if (addr->addrtype == TIPC_ADDR_NAME) |
| 437 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 438 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
| 439 | res = -EAFNOSUPPORT; |
| 440 | goto exit; |
| 441 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 442 | |
Ying Xue | 13a2e89 | 2013-06-17 10:54:40 -0400 | [diff] [blame] | 443 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
Ying Xue | 7d0ab17 | 2013-06-17 10:54:41 -0400 | [diff] [blame] | 444 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 445 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
| 446 | res = -EACCES; |
| 447 | goto exit; |
| 448 | } |
Allan Stephens | c422f1b | 2011-11-02 15:49:40 -0400 | [diff] [blame] | 449 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 450 | res = (addr->scope > 0) ? |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 451 | tipc_publish(&tsk->port, addr->scope, &addr->addr.nameseq) : |
| 452 | tipc_withdraw(&tsk->port, -addr->scope, &addr->addr.nameseq); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 453 | exit: |
| 454 | release_sock(sk); |
| 455 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 456 | } |
| 457 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 458 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 459 | * tipc_getname - get port ID of socket or peer socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 460 | * @sock: socket structure |
| 461 | * @uaddr: area for returned socket address |
| 462 | * @uaddr_len: area for returned length of socket address |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 463 | * @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] | 464 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 465 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 466 | * |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 467 | * NOTE: This routine doesn't need to take the socket lock since it only |
| 468 | * accesses socket information that is unchanging (or which changes in |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 469 | * a completely predictable manner). |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 470 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 471 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
| 472 | int *uaddr_len, int peer) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 473 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 474 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 475 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 476 | |
Kulikov Vasiliy | 88f8a5e | 2010-10-31 07:10:32 +0000 | [diff] [blame] | 477 | memset(addr, 0, sizeof(*addr)); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 478 | if (peer) { |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 479 | if ((sock->state != SS_CONNECTED) && |
| 480 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) |
| 481 | return -ENOTCONN; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 482 | addr->addr.id.ref = tipc_port_peerport(&tsk->port); |
| 483 | addr->addr.id.node = tipc_port_peernode(&tsk->port); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 484 | } else { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 485 | addr->addr.id.ref = tsk->port.ref; |
Allan Stephens | b924dcf | 2010-11-30 12:01:03 +0000 | [diff] [blame] | 486 | addr->addr.id.node = tipc_own_addr; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 487 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 488 | |
| 489 | *uaddr_len = sizeof(*addr); |
| 490 | addr->addrtype = TIPC_ADDR_ID; |
| 491 | addr->family = AF_TIPC; |
| 492 | addr->scope = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 493 | addr->addr.name.domain = 0; |
| 494 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 495 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 499 | * tipc_poll - read and possibly block on pollmask |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 500 | * @file: file structure associated with the socket |
| 501 | * @sock: socket for which to calculate the poll bits |
| 502 | * @wait: ??? |
| 503 | * |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 504 | * Returns pollmask value |
| 505 | * |
| 506 | * COMMENTARY: |
| 507 | * It appears that the usual socket locking mechanisms are not useful here |
| 508 | * since the pollmask info is potentially out-of-date the moment this routine |
| 509 | * exits. TCP and other protocols seem to rely on higher level poll routines |
| 510 | * to handle any preventable race conditions, so TIPC will do the same ... |
| 511 | * |
| 512 | * TIPC sets the returned events as follows: |
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 | * socket state flags set |
| 515 | * ------------ --------- |
| 516 | * unconnected no read flags |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 517 | * POLLOUT if port is not congested |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 518 | * |
| 519 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue |
| 520 | * no write flags |
| 521 | * |
| 522 | * connected POLLIN/POLLRDNORM if data in rx queue |
| 523 | * POLLOUT if port is not congested |
| 524 | * |
| 525 | * disconnecting POLLIN/POLLRDNORM/POLLHUP |
| 526 | * no write flags |
| 527 | * |
| 528 | * listening POLLIN if SYN in rx queue |
| 529 | * no write flags |
| 530 | * |
| 531 | * ready POLLIN/POLLRDNORM if data in rx queue |
| 532 | * [connectionless] POLLOUT (since port cannot be congested) |
| 533 | * |
| 534 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
| 535 | * imply that the operation will succeed, merely that it should be performed |
| 536 | * and will not block. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 537 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 538 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
| 539 | poll_table *wait) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 540 | { |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 541 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 542 | struct tipc_sock *tsk = tipc_sk(sk); |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 543 | u32 mask = 0; |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 544 | |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 545 | sock_poll_wait(file, sk_sleep(sk), wait); |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 546 | |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 547 | switch ((int)sock->state) { |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 548 | case SS_UNCONNECTED: |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 549 | if (!tsk->link_cong) |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 550 | mask |= POLLOUT; |
| 551 | break; |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 552 | case SS_READY: |
| 553 | case SS_CONNECTED: |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 554 | if (!tsk->link_cong && !tipc_sk_conn_cong(tsk)) |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 555 | mask |= POLLOUT; |
| 556 | /* fall thru' */ |
| 557 | case SS_CONNECTING: |
| 558 | case SS_LISTENING: |
| 559 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 560 | mask |= (POLLIN | POLLRDNORM); |
| 561 | break; |
| 562 | case SS_DISCONNECTING: |
| 563 | mask = (POLLIN | POLLRDNORM | POLLHUP); |
| 564 | break; |
| 565 | } |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 566 | |
| 567 | return mask; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 568 | } |
| 569 | |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 570 | /** |
| 571 | * tipc_sendmcast - send multicast message |
| 572 | * @sock: socket structure |
| 573 | * @seq: destination address |
| 574 | * @iov: message data to send |
| 575 | * @dsz: total length of message data |
| 576 | * @timeo: timeout to wait for wakeup |
| 577 | * |
| 578 | * Called from function tipc_sendmsg(), which has done all sanity checks |
| 579 | * Returns the number of bytes sent on success, or errno |
| 580 | */ |
| 581 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, |
| 582 | struct iovec *iov, size_t dsz, long timeo) |
| 583 | { |
| 584 | struct sock *sk = sock->sk; |
| 585 | struct tipc_msg *mhdr = &tipc_sk(sk)->port.phdr; |
| 586 | struct sk_buff *buf; |
| 587 | uint mtu; |
| 588 | int rc; |
| 589 | |
| 590 | msg_set_type(mhdr, TIPC_MCAST_MSG); |
| 591 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); |
| 592 | msg_set_destport(mhdr, 0); |
| 593 | msg_set_destnode(mhdr, 0); |
| 594 | msg_set_nametype(mhdr, seq->type); |
| 595 | msg_set_namelower(mhdr, seq->lower); |
| 596 | msg_set_nameupper(mhdr, seq->upper); |
| 597 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); |
| 598 | |
| 599 | new_mtu: |
| 600 | mtu = tipc_bclink_get_mtu(); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 601 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 602 | if (unlikely(rc < 0)) |
| 603 | return rc; |
| 604 | |
| 605 | do { |
| 606 | rc = tipc_bclink_xmit(buf); |
| 607 | if (likely(rc >= 0)) { |
| 608 | rc = dsz; |
| 609 | break; |
| 610 | } |
| 611 | if (rc == -EMSGSIZE) |
| 612 | goto new_mtu; |
| 613 | if (rc != -ELINKCONG) |
| 614 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 615 | tipc_sk(sk)->link_cong = 1; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 616 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
| 617 | if (rc) |
| 618 | kfree_skb_list(buf); |
| 619 | } while (!rc); |
| 620 | return rc; |
| 621 | } |
| 622 | |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 623 | /* tipc_sk_mcast_rcv - Deliver multicast message to all destination sockets |
| 624 | */ |
| 625 | void tipc_sk_mcast_rcv(struct sk_buff *buf) |
| 626 | { |
| 627 | struct tipc_msg *msg = buf_msg(buf); |
| 628 | struct tipc_port_list dports = {0, NULL, }; |
| 629 | struct tipc_port_list *item; |
| 630 | struct sk_buff *b; |
| 631 | uint i, last, dst = 0; |
| 632 | u32 scope = TIPC_CLUSTER_SCOPE; |
| 633 | |
| 634 | if (in_own_node(msg_orignode(msg))) |
| 635 | scope = TIPC_NODE_SCOPE; |
| 636 | |
| 637 | /* Create destination port list: */ |
| 638 | tipc_nametbl_mc_translate(msg_nametype(msg), |
| 639 | msg_namelower(msg), |
| 640 | msg_nameupper(msg), |
| 641 | scope, |
| 642 | &dports); |
| 643 | last = dports.count; |
| 644 | if (!last) { |
| 645 | kfree_skb(buf); |
| 646 | return; |
| 647 | } |
| 648 | |
| 649 | for (item = &dports; item; item = item->next) { |
| 650 | for (i = 0; i < PLSIZE && ++dst <= last; i++) { |
| 651 | b = (dst != last) ? skb_clone(buf, GFP_ATOMIC) : buf; |
| 652 | if (!b) { |
| 653 | pr_warn("Failed do clone mcast rcv buffer\n"); |
| 654 | continue; |
| 655 | } |
| 656 | msg_set_destport(msg, item->ports[i]); |
| 657 | tipc_sk_rcv(b); |
| 658 | } |
| 659 | } |
| 660 | tipc_port_list_free(&dports); |
| 661 | } |
| 662 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 663 | /** |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 664 | * tipc_sk_proto_rcv - receive a connection mng protocol message |
| 665 | * @tsk: receiving socket |
| 666 | * @dnode: node to send response message to, if any |
| 667 | * @buf: buffer containing protocol message |
| 668 | * Returns 0 (TIPC_OK) if message was consumed, 1 (TIPC_FWD_MSG) if |
| 669 | * (CONN_PROBE_REPLY) message should be forwarded. |
| 670 | */ |
Wei Yongjun | 52f50ce | 2014-07-20 13:14:28 +0800 | [diff] [blame] | 671 | static int tipc_sk_proto_rcv(struct tipc_sock *tsk, u32 *dnode, |
| 672 | struct sk_buff *buf) |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 673 | { |
| 674 | struct tipc_msg *msg = buf_msg(buf); |
| 675 | struct tipc_port *port = &tsk->port; |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 676 | int conn_cong; |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 677 | |
| 678 | /* Ignore if connection cannot be validated: */ |
| 679 | if (!port->connected || !tipc_port_peer_msg(port, msg)) |
| 680 | goto exit; |
| 681 | |
| 682 | port->probing_state = TIPC_CONN_OK; |
| 683 | |
| 684 | if (msg_type(msg) == CONN_ACK) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 685 | conn_cong = tipc_sk_conn_cong(tsk); |
| 686 | tsk->sent_unacked -= msg_msgcnt(msg); |
| 687 | if (conn_cong) |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 688 | tsk->sk.sk_write_space(&tsk->sk); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 689 | } else if (msg_type(msg) == CONN_PROBE) { |
| 690 | if (!tipc_msg_reverse(buf, dnode, TIPC_OK)) |
| 691 | return TIPC_OK; |
| 692 | msg_set_type(msg, CONN_PROBE_REPLY); |
| 693 | return TIPC_FWD_MSG; |
| 694 | } |
| 695 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ |
| 696 | exit: |
| 697 | kfree_skb(buf); |
| 698 | return TIPC_OK; |
| 699 | } |
| 700 | |
| 701 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 702 | * dest_name_check - verify user is permitted to send to specified port name |
| 703 | * @dest: destination address |
| 704 | * @m: descriptor for message to be sent |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 705 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 706 | * Prevents restricted configuration commands from being issued by |
| 707 | * unauthorized users. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 708 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 709 | * Returns 0 if permission is granted, otherwise errno |
| 710 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 711 | static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 712 | { |
| 713 | struct tipc_cfg_msg_hdr hdr; |
| 714 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 715 | if (unlikely(dest->addrtype == TIPC_ADDR_ID)) |
| 716 | return 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 717 | if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES)) |
| 718 | return 0; |
| 719 | if (likely(dest->addr.name.name.type == TIPC_TOP_SRV)) |
| 720 | return 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 721 | if (likely(dest->addr.name.name.type != TIPC_CFG_SRV)) |
| 722 | return -EACCES; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 723 | |
Allan Stephens | 3f8dd94 | 2011-01-18 13:09:29 -0500 | [diff] [blame] | 724 | if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr))) |
| 725 | return -EMSGSIZE; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 726 | 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] | 727 | return -EFAULT; |
Allan Stephens | 70cb234 | 2006-06-25 23:41:47 -0700 | [diff] [blame] | 728 | if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 729 | return -EACCES; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 730 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 731 | return 0; |
| 732 | } |
| 733 | |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 734 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
| 735 | { |
| 736 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 737 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 738 | DEFINE_WAIT(wait); |
| 739 | int done; |
| 740 | |
| 741 | do { |
| 742 | int err = sock_error(sk); |
| 743 | if (err) |
| 744 | return err; |
| 745 | if (sock->state == SS_DISCONNECTING) |
| 746 | return -EPIPE; |
| 747 | if (!*timeo_p) |
| 748 | return -EAGAIN; |
| 749 | if (signal_pending(current)) |
| 750 | return sock_intr_errno(*timeo_p); |
| 751 | |
| 752 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 753 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 754 | finish_wait(sk_sleep(sk), &wait); |
| 755 | } while (!done); |
| 756 | return 0; |
| 757 | } |
| 758 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 759 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 760 | * tipc_sendmsg - send message in connectionless manner |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 761 | * @iocb: if NULL, indicates that socket lock is already held |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 762 | * @sock: socket structure |
| 763 | * @m: message to send |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 764 | * @dsz: amount of user data to be sent |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 765 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 766 | * Message must have an destination specified explicitly. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 767 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 768 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
| 769 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 770 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 771 | * Returns the number of bytes sent on success, or errno otherwise |
| 772 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 773 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 774 | struct msghdr *m, size_t dsz) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 775 | { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 776 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 777 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 778 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 5c31142 | 2014-03-12 11:31:13 -0400 | [diff] [blame] | 779 | struct tipc_port *port = &tsk->port; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 780 | struct tipc_msg *mhdr = &port->phdr; |
| 781 | struct iovec *iov = m->msg_iov; |
| 782 | u32 dnode, dport; |
| 783 | struct sk_buff *buf; |
| 784 | struct tipc_name_seq *seq = &dest->addr.nameseq; |
| 785 | u32 mtu; |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 786 | long timeo; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 787 | int rc = -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 788 | |
| 789 | if (unlikely(!dest)) |
| 790 | return -EDESTADDRREQ; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 791 | |
Allan Stephens | 51f9cc1 | 2006-06-25 23:49:06 -0700 | [diff] [blame] | 792 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
| 793 | (dest->family != AF_TIPC))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 794 | return -EINVAL; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 795 | |
| 796 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
Allan Stephens | c29c3f7 | 2010-04-20 17:58:24 -0400 | [diff] [blame] | 797 | return -EMSGSIZE; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 798 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 799 | if (iocb) |
| 800 | lock_sock(sk); |
| 801 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 802 | if (unlikely(sock->state != SS_READY)) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 803 | if (sock->state == SS_LISTENING) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 804 | rc = -EPIPE; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 805 | goto exit; |
Allan Stephens | 3388007 | 2006-06-25 23:44:57 -0700 | [diff] [blame] | 806 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 807 | if (sock->state != SS_UNCONNECTED) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 808 | rc = -EISCONN; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 809 | goto exit; |
| 810 | } |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 811 | if (tsk->port.published) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 812 | rc = -EOPNOTSUPP; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 813 | goto exit; |
| 814 | } |
| 815 | if (dest->addrtype == TIPC_ADDR_NAME) { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 816 | tsk->port.conn_type = dest->addr.name.name.type; |
| 817 | tsk->port.conn_instance = dest->addr.name.name.instance; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 818 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 819 | } |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 820 | rc = dest_name_check(dest, m); |
| 821 | if (rc) |
| 822 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 823 | |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 824 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 825 | |
| 826 | if (dest->addrtype == TIPC_ADDR_MCAST) { |
| 827 | rc = tipc_sendmcast(sock, seq, iov, dsz, timeo); |
| 828 | goto exit; |
| 829 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
| 830 | u32 type = dest->addr.name.name.type; |
| 831 | u32 inst = dest->addr.name.name.instance; |
| 832 | u32 domain = dest->addr.name.domain; |
| 833 | |
| 834 | dnode = domain; |
| 835 | msg_set_type(mhdr, TIPC_NAMED_MSG); |
| 836 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); |
| 837 | msg_set_nametype(mhdr, type); |
| 838 | msg_set_nameinst(mhdr, inst); |
| 839 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); |
| 840 | dport = tipc_nametbl_translate(type, inst, &dnode); |
| 841 | msg_set_destnode(mhdr, dnode); |
| 842 | msg_set_destport(mhdr, dport); |
| 843 | if (unlikely(!dport && !dnode)) { |
| 844 | rc = -EHOSTUNREACH; |
| 845 | goto exit; |
| 846 | } |
| 847 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
| 848 | dnode = dest->addr.id.node; |
| 849 | msg_set_type(mhdr, TIPC_DIRECT_MSG); |
| 850 | msg_set_lookup_scope(mhdr, 0); |
| 851 | msg_set_destnode(mhdr, dnode); |
| 852 | msg_set_destport(mhdr, dest->addr.id.ref); |
| 853 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); |
| 854 | } |
| 855 | |
| 856 | new_mtu: |
| 857 | mtu = tipc_node_get_mtu(dnode, tsk->port.ref); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 858 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 859 | if (rc < 0) |
| 860 | goto exit; |
| 861 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 862 | do { |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 863 | TIPC_SKB_CB(buf)->wakeup_pending = tsk->link_cong; |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 864 | rc = tipc_link_xmit(buf, dnode, tsk->port.ref); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 865 | if (likely(rc >= 0)) { |
| 866 | if (sock->state != SS_READY) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 867 | sock->state = SS_CONNECTING; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 868 | rc = dsz; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 869 | break; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 870 | } |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 871 | if (rc == -EMSGSIZE) |
| 872 | goto new_mtu; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 873 | if (rc != -ELINKCONG) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 874 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 875 | tsk->link_cong = 1; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 876 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
Erik Hugne | 70452dc | 2014-07-06 20:38:50 -0400 | [diff] [blame] | 877 | if (rc) |
| 878 | kfree_skb_list(buf); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 879 | } while (!rc); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 880 | exit: |
| 881 | if (iocb) |
| 882 | release_sock(sk); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 883 | |
| 884 | return rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 885 | } |
| 886 | |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 887 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
| 888 | { |
| 889 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 890 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 891 | DEFINE_WAIT(wait); |
| 892 | int done; |
| 893 | |
| 894 | do { |
| 895 | int err = sock_error(sk); |
| 896 | if (err) |
| 897 | return err; |
| 898 | if (sock->state == SS_DISCONNECTING) |
| 899 | return -EPIPE; |
| 900 | else if (sock->state != SS_CONNECTED) |
| 901 | return -ENOTCONN; |
| 902 | if (!*timeo_p) |
| 903 | return -EAGAIN; |
| 904 | if (signal_pending(current)) |
| 905 | return sock_intr_errno(*timeo_p); |
| 906 | |
| 907 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
| 908 | done = sk_wait_event(sk, timeo_p, |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 909 | (!tsk->link_cong && |
| 910 | !tipc_sk_conn_cong(tsk)) || |
| 911 | !tsk->port.connected); |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 912 | finish_wait(sk_sleep(sk), &wait); |
| 913 | } while (!done); |
| 914 | return 0; |
| 915 | } |
| 916 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 917 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 918 | * tipc_send_stream - send stream-oriented data |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 919 | * @iocb: (unused) |
| 920 | * @sock: socket structure |
| 921 | * @m: data to send |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 922 | * @dsz: total length of data to be transmitted |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 923 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 924 | * Used for SOCK_STREAM data. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 925 | * |
| 926 | * Returns the number of bytes sent on success (or partial success), |
Allan Stephens | 1303e8f | 2006-06-25 23:46:50 -0700 | [diff] [blame] | 927 | * or errno if no data sent |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 928 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 929 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 930 | struct msghdr *m, size_t dsz) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 931 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 932 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 933 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 934 | struct tipc_port *port = &tsk->port; |
| 935 | struct tipc_msg *mhdr = &port->phdr; |
| 936 | struct sk_buff *buf; |
| 937 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
| 938 | u32 ref = port->ref; |
| 939 | int rc = -EINVAL; |
| 940 | long timeo; |
| 941 | u32 dnode; |
| 942 | uint mtu, send, sent = 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 943 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 944 | /* Handle implied connection establishment */ |
| 945 | if (unlikely(dest)) { |
| 946 | rc = tipc_sendmsg(iocb, sock, m, dsz); |
| 947 | if (dsz && (dsz == rc)) |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 948 | tsk->sent_unacked = 1; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 949 | return rc; |
| 950 | } |
| 951 | if (dsz > (uint)INT_MAX) |
| 952 | return -EMSGSIZE; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 953 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 954 | if (iocb) |
| 955 | lock_sock(sk); |
| 956 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 957 | if (unlikely(sock->state != SS_CONNECTED)) { |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 958 | if (sock->state == SS_DISCONNECTING) |
| 959 | rc = -EPIPE; |
wangweidong | b055597 | 2013-12-27 10:09:39 +0800 | [diff] [blame] | 960 | else |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 961 | rc = -ENOTCONN; |
wangweidong | 3b8401f | 2013-12-12 09:36:40 +0800 | [diff] [blame] | 962 | goto exit; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 963 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 964 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 965 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
| 966 | dnode = tipc_port_peernode(port); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 967 | |
| 968 | next: |
| 969 | mtu = port->max_pkt; |
| 970 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 971 | 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] | 972 | if (unlikely(rc < 0)) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 973 | goto exit; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 974 | do { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 975 | if (likely(!tipc_sk_conn_cong(tsk))) { |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 976 | rc = tipc_link_xmit(buf, dnode, ref); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 977 | if (likely(!rc)) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 978 | tsk->sent_unacked++; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 979 | sent += send; |
| 980 | if (sent == dsz) |
| 981 | break; |
| 982 | goto next; |
Allan Stephens | 1303e8f | 2006-06-25 23:46:50 -0700 | [diff] [blame] | 983 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 984 | if (rc == -EMSGSIZE) { |
| 985 | port->max_pkt = tipc_node_get_mtu(dnode, ref); |
| 986 | goto next; |
| 987 | } |
| 988 | if (rc != -ELINKCONG) |
| 989 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 990 | tsk->link_cong = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 991 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 992 | rc = tipc_wait_for_sndpkt(sock, &timeo); |
Erik Hugne | 70452dc | 2014-07-06 20:38:50 -0400 | [diff] [blame] | 993 | if (rc) |
| 994 | kfree_skb_list(buf); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 995 | } while (!rc); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 996 | exit: |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 997 | if (iocb) |
| 998 | release_sock(sk); |
| 999 | return sent ? sent : rc; |
| 1000 | } |
| 1001 | |
| 1002 | /** |
| 1003 | * tipc_send_packet - send a connection-oriented message |
| 1004 | * @iocb: if NULL, indicates that socket lock is already held |
| 1005 | * @sock: socket structure |
| 1006 | * @m: message to send |
| 1007 | * @dsz: length of data to be transmitted |
| 1008 | * |
| 1009 | * Used for SOCK_SEQPACKET messages. |
| 1010 | * |
| 1011 | * Returns the number of bytes sent on success, or errno otherwise |
| 1012 | */ |
| 1013 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
| 1014 | struct msghdr *m, size_t dsz) |
| 1015 | { |
| 1016 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
| 1017 | return -EMSGSIZE; |
| 1018 | |
| 1019 | return tipc_send_stream(iocb, sock, m, dsz); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1020 | } |
| 1021 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1022 | /* tipc_sk_finish_conn - complete the setup of a connection |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1023 | */ |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1024 | static void tipc_sk_finish_conn(struct tipc_port *port, u32 peer_port, |
| 1025 | u32 peer_node) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1026 | { |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1027 | struct tipc_msg *msg = &port->phdr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1028 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1029 | msg_set_destnode(msg, peer_node); |
| 1030 | msg_set_destport(msg, peer_port); |
| 1031 | msg_set_type(msg, TIPC_CONN_MSG); |
| 1032 | msg_set_lookup_scope(msg, 0); |
| 1033 | msg_set_hdr_sz(msg, SHORT_H_SIZE); |
Jon Paul Maloy | f9fef18 | 2014-03-12 11:31:08 -0400 | [diff] [blame] | 1034 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1035 | port->probing_interval = CONN_PROBING_INTERVAL; |
| 1036 | port->probing_state = TIPC_CONN_OK; |
| 1037 | port->connected = 1; |
| 1038 | k_start_timer(&port->timer, port->probing_interval); |
| 1039 | tipc_node_add_conn(peer_node, port->ref, peer_port); |
| 1040 | port->max_pkt = tipc_node_get_mtu(peer_node, port->ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1041 | } |
| 1042 | |
| 1043 | /** |
| 1044 | * set_orig_addr - capture sender's address for received message |
| 1045 | * @m: descriptor for message info |
| 1046 | * @msg: received message header |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1047 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1048 | * Note: Address is not captured if not requested by receiver. |
| 1049 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 1050 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1051 | { |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 1052 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1053 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1054 | if (addr) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1055 | addr->family = AF_TIPC; |
| 1056 | addr->addrtype = TIPC_ADDR_ID; |
Mathias Krause | 60085c3 | 2013-04-07 01:52:00 +0000 | [diff] [blame] | 1057 | memset(&addr->addr, 0, sizeof(addr->addr)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1058 | addr->addr.id.ref = msg_origport(msg); |
| 1059 | addr->addr.id.node = msg_orignode(msg); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1060 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
| 1061 | addr->scope = 0; /* could leave uninitialized */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1062 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | /** |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1067 | * anc_data_recv - optionally capture ancillary data for received message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1068 | * @m: descriptor for message info |
| 1069 | * @msg: received message header |
| 1070 | * @tport: TIPC port associated with message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1071 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1072 | * Note: Ancillary data is not captured if not requested by receiver. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1073 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1074 | * Returns 0 if successful, otherwise errno |
| 1075 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 1076 | static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 1077 | struct tipc_port *tport) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1078 | { |
| 1079 | u32 anc_data[3]; |
| 1080 | u32 err; |
| 1081 | u32 dest_type; |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1082 | int has_name; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1083 | int res; |
| 1084 | |
| 1085 | if (likely(m->msg_controllen == 0)) |
| 1086 | return 0; |
| 1087 | |
| 1088 | /* Optionally capture errored message object(s) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1089 | err = msg ? msg_errcode(msg) : 0; |
| 1090 | if (unlikely(err)) { |
| 1091 | anc_data[0] = err; |
| 1092 | anc_data[1] = msg_data_sz(msg); |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1093 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
| 1094 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1095 | return res; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1096 | if (anc_data[1]) { |
| 1097 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], |
| 1098 | msg_data(msg)); |
| 1099 | if (res) |
| 1100 | return res; |
| 1101 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1102 | } |
| 1103 | |
| 1104 | /* Optionally capture message destination object */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1105 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
| 1106 | switch (dest_type) { |
| 1107 | case TIPC_NAMED_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1108 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1109 | anc_data[0] = msg_nametype(msg); |
| 1110 | anc_data[1] = msg_namelower(msg); |
| 1111 | anc_data[2] = msg_namelower(msg); |
| 1112 | break; |
| 1113 | case TIPC_MCAST_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1114 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1115 | anc_data[0] = msg_nametype(msg); |
| 1116 | anc_data[1] = msg_namelower(msg); |
| 1117 | anc_data[2] = msg_nameupper(msg); |
| 1118 | break; |
| 1119 | case TIPC_CONN_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1120 | has_name = (tport->conn_type != 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1121 | anc_data[0] = tport->conn_type; |
| 1122 | anc_data[1] = tport->conn_instance; |
| 1123 | anc_data[2] = tport->conn_instance; |
| 1124 | break; |
| 1125 | default: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1126 | has_name = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1127 | } |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1128 | if (has_name) { |
| 1129 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); |
| 1130 | if (res) |
| 1131 | return res; |
| 1132 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1133 | |
| 1134 | return 0; |
| 1135 | } |
| 1136 | |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1137 | static void tipc_sk_send_ack(struct tipc_port *port, uint ack) |
| 1138 | { |
| 1139 | struct sk_buff *buf = NULL; |
| 1140 | struct tipc_msg *msg; |
| 1141 | u32 peer_port = tipc_port_peerport(port); |
| 1142 | u32 dnode = tipc_port_peernode(port); |
| 1143 | |
| 1144 | if (!port->connected) |
| 1145 | return; |
| 1146 | buf = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode, |
| 1147 | tipc_own_addr, peer_port, port->ref, TIPC_OK); |
| 1148 | if (!buf) |
| 1149 | return; |
| 1150 | msg = buf_msg(buf); |
| 1151 | msg_set_msgcnt(msg, ack); |
| 1152 | tipc_link_xmit(buf, dnode, msg_link_selector(msg)); |
| 1153 | } |
| 1154 | |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1155 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1156 | { |
| 1157 | struct sock *sk = sock->sk; |
| 1158 | DEFINE_WAIT(wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1159 | long timeo = *timeop; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1160 | int err; |
| 1161 | |
| 1162 | for (;;) { |
| 1163 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 1164 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1165 | if (sock->state == SS_DISCONNECTING) { |
| 1166 | err = -ENOTCONN; |
| 1167 | break; |
| 1168 | } |
| 1169 | release_sock(sk); |
| 1170 | timeo = schedule_timeout(timeo); |
| 1171 | lock_sock(sk); |
| 1172 | } |
| 1173 | err = 0; |
| 1174 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 1175 | break; |
| 1176 | err = sock_intr_errno(timeo); |
| 1177 | if (signal_pending(current)) |
| 1178 | break; |
| 1179 | err = -EAGAIN; |
| 1180 | if (!timeo) |
| 1181 | break; |
| 1182 | } |
| 1183 | finish_wait(sk_sleep(sk), &wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1184 | *timeop = timeo; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1185 | return err; |
| 1186 | } |
| 1187 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1188 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1189 | * tipc_recvmsg - receive packet-oriented message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1190 | * @iocb: (unused) |
| 1191 | * @m: descriptor for message info |
| 1192 | * @buf_len: total size of user buffer area |
| 1193 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1194 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1195 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
| 1196 | * If the complete message doesn't fit in user area, truncate it. |
| 1197 | * |
| 1198 | * Returns size of returned message data, errno otherwise |
| 1199 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1200 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 1201 | struct msghdr *m, size_t buf_len, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1202 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1203 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1204 | struct tipc_sock *tsk = tipc_sk(sk); |
| 1205 | struct tipc_port *port = &tsk->port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1206 | struct sk_buff *buf; |
| 1207 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1208 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1209 | unsigned int sz; |
| 1210 | u32 err; |
| 1211 | int res; |
| 1212 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1213 | /* Catch invalid receive requests */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1214 | if (unlikely(!buf_len)) |
| 1215 | return -EINVAL; |
| 1216 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1217 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1218 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1219 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1220 | res = -ENOTCONN; |
| 1221 | goto exit; |
| 1222 | } |
| 1223 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1224 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1225 | restart: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1226 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1227 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1228 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1229 | if (res) |
| 1230 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1231 | |
| 1232 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1233 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1234 | msg = buf_msg(buf); |
| 1235 | sz = msg_data_sz(msg); |
| 1236 | err = msg_errcode(msg); |
| 1237 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1238 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1239 | if ((!sz) && (!err)) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1240 | advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1241 | goto restart; |
| 1242 | } |
| 1243 | |
| 1244 | /* Capture sender's address (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1245 | set_orig_addr(m, msg); |
| 1246 | |
| 1247 | /* Capture ancillary data (optional) */ |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1248 | res = anc_data_recv(m, msg, port); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1249 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1250 | goto exit; |
| 1251 | |
| 1252 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1253 | if (!err) { |
| 1254 | if (unlikely(buf_len < sz)) { |
| 1255 | sz = buf_len; |
| 1256 | m->msg_flags |= MSG_TRUNC; |
| 1257 | } |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1258 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg), |
| 1259 | m->msg_iov, sz); |
| 1260 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1261 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1262 | res = sz; |
| 1263 | } else { |
| 1264 | if ((sock->state == SS_READY) || |
| 1265 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) |
| 1266 | res = 0; |
| 1267 | else |
| 1268 | res = -ECONNRESET; |
| 1269 | } |
| 1270 | |
| 1271 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1272 | if (likely(!(flags & MSG_PEEK))) { |
Allan Stephens | 9900980 | 2008-04-15 00:06:12 -0700 | [diff] [blame] | 1273 | if ((sock->state != SS_READY) && |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1274 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1275 | tipc_sk_send_ack(port, tsk->rcv_unacked); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1276 | tsk->rcv_unacked = 0; |
| 1277 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1278 | advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1279 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1280 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1281 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1282 | return res; |
| 1283 | } |
| 1284 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1285 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1286 | * tipc_recv_stream - receive stream-oriented data |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1287 | * @iocb: (unused) |
| 1288 | * @m: descriptor for message info |
| 1289 | * @buf_len: total size of user buffer area |
| 1290 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1291 | * |
| 1292 | * Used for SOCK_STREAM messages only. If not enough data is available |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1293 | * will optionally wait for more; never truncates data. |
| 1294 | * |
| 1295 | * Returns size of returned message data, errno otherwise |
| 1296 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1297 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
| 1298 | struct msghdr *m, size_t buf_len, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1299 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1300 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1301 | struct tipc_sock *tsk = tipc_sk(sk); |
| 1302 | struct tipc_port *port = &tsk->port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1303 | struct sk_buff *buf; |
| 1304 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1305 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1306 | unsigned int sz; |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1307 | int sz_to_copy, target, needed; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1308 | int sz_copied = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1309 | u32 err; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1310 | int res = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1311 | |
| 1312 | /* Catch invalid receive attempts */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1313 | if (unlikely(!buf_len)) |
| 1314 | return -EINVAL; |
| 1315 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1316 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1317 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1318 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1319 | res = -ENOTCONN; |
| 1320 | goto exit; |
| 1321 | } |
| 1322 | |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1323 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1324 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 1325 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1326 | restart: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1327 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1328 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1329 | if (res) |
| 1330 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1331 | |
| 1332 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1333 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1334 | msg = buf_msg(buf); |
| 1335 | sz = msg_data_sz(msg); |
| 1336 | err = msg_errcode(msg); |
| 1337 | |
| 1338 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1339 | if ((!sz) && (!err)) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1340 | advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1341 | goto restart; |
| 1342 | } |
| 1343 | |
| 1344 | /* Optionally capture sender's address & ancillary data of first msg */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1345 | if (sz_copied == 0) { |
| 1346 | set_orig_addr(m, msg); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1347 | res = anc_data_recv(m, msg, port); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1348 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1349 | goto exit; |
| 1350 | } |
| 1351 | |
| 1352 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1353 | if (!err) { |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1354 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1355 | |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1356 | sz -= offset; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1357 | needed = (buf_len - sz_copied); |
| 1358 | sz_to_copy = (sz <= needed) ? sz : needed; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1359 | |
| 1360 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset, |
| 1361 | m->msg_iov, sz_to_copy); |
| 1362 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1363 | goto exit; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1364 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1365 | sz_copied += sz_to_copy; |
| 1366 | |
| 1367 | if (sz_to_copy < sz) { |
| 1368 | if (!(flags & MSG_PEEK)) |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1369 | TIPC_SKB_CB(buf)->handle = |
| 1370 | (void *)(unsigned long)(offset + sz_to_copy); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1371 | goto exit; |
| 1372 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1373 | } else { |
| 1374 | if (sz_copied != 0) |
| 1375 | goto exit; /* can't add error msg to valid data */ |
| 1376 | |
| 1377 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) |
| 1378 | res = 0; |
| 1379 | else |
| 1380 | res = -ECONNRESET; |
| 1381 | } |
| 1382 | |
| 1383 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1384 | if (likely(!(flags & MSG_PEEK))) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1385 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1386 | tipc_sk_send_ack(port, tsk->rcv_unacked); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1387 | tsk->rcv_unacked = 0; |
| 1388 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1389 | advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1390 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1391 | |
| 1392 | /* Loop around if more data is required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1393 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
| 1394 | (!skb_queue_empty(&sk->sk_receive_queue) || |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1395 | (sz_copied < target)) && /* and more is ready or required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1396 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
| 1397 | (!err)) /* and haven't reached a FIN */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1398 | goto restart; |
| 1399 | |
| 1400 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1401 | release_sock(sk); |
Allan Stephens | a3b0a5a | 2006-06-25 23:48:22 -0700 | [diff] [blame] | 1402 | return sz_copied ? sz_copied : res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1403 | } |
| 1404 | |
| 1405 | /** |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1406 | * tipc_write_space - wake up thread if port congestion is released |
| 1407 | * @sk: socket |
| 1408 | */ |
| 1409 | static void tipc_write_space(struct sock *sk) |
| 1410 | { |
| 1411 | struct socket_wq *wq; |
| 1412 | |
| 1413 | rcu_read_lock(); |
| 1414 | wq = rcu_dereference(sk->sk_wq); |
| 1415 | if (wq_has_sleeper(wq)) |
| 1416 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
| 1417 | POLLWRNORM | POLLWRBAND); |
| 1418 | rcu_read_unlock(); |
| 1419 | } |
| 1420 | |
| 1421 | /** |
| 1422 | * tipc_data_ready - wake up threads to indicate messages have been received |
| 1423 | * @sk: socket |
| 1424 | * @len: the length of messages |
| 1425 | */ |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1426 | static void tipc_data_ready(struct sock *sk) |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1427 | { |
| 1428 | struct socket_wq *wq; |
| 1429 | |
| 1430 | rcu_read_lock(); |
| 1431 | wq = rcu_dereference(sk->sk_wq); |
| 1432 | if (wq_has_sleeper(wq)) |
| 1433 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
| 1434 | POLLRDNORM | POLLRDBAND); |
| 1435 | rcu_read_unlock(); |
| 1436 | } |
| 1437 | |
| 1438 | /** |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1439 | * filter_connect - Handle all incoming messages for a connection-based socket |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1440 | * @tsk: TIPC socket |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1441 | * @msg: message |
| 1442 | * |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1443 | * Returns 0 (TIPC_OK) if everyting ok, -TIPC_ERR_NO_PORT otherwise |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1444 | */ |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1445 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **buf) |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1446 | { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1447 | struct sock *sk = &tsk->sk; |
| 1448 | struct tipc_port *port = &tsk->port; |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1449 | struct socket *sock = sk->sk_socket; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1450 | struct tipc_msg *msg = buf_msg(*buf); |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1451 | |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1452 | int retval = -TIPC_ERR_NO_PORT; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1453 | |
| 1454 | if (msg_mcast(msg)) |
| 1455 | return retval; |
| 1456 | |
| 1457 | switch ((int)sock->state) { |
| 1458 | case SS_CONNECTED: |
| 1459 | /* Accept only connection-based messages sent by peer */ |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1460 | if (msg_connected(msg) && tipc_port_peer_msg(port, msg)) { |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1461 | if (unlikely(msg_errcode(msg))) { |
| 1462 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1463 | port->connected = 0; |
| 1464 | /* let timer expire on it's own */ |
| 1465 | tipc_node_remove_conn(tipc_port_peernode(port), |
| 1466 | port->ref); |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1467 | } |
| 1468 | retval = TIPC_OK; |
| 1469 | } |
| 1470 | break; |
| 1471 | case SS_CONNECTING: |
| 1472 | /* Accept only ACK or NACK message */ |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1473 | |
| 1474 | if (unlikely(!msg_connected(msg))) |
| 1475 | break; |
| 1476 | |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1477 | if (unlikely(msg_errcode(msg))) { |
| 1478 | sock->state = SS_DISCONNECTING; |
Erik Hugne | 2c8d851 | 2013-08-28 09:29:58 +0200 | [diff] [blame] | 1479 | sk->sk_err = ECONNREFUSED; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1480 | retval = TIPC_OK; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1481 | break; |
| 1482 | } |
| 1483 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1484 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1485 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1486 | sk->sk_err = EINVAL; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1487 | retval = TIPC_OK; |
| 1488 | break; |
| 1489 | } |
| 1490 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1491 | tipc_sk_finish_conn(port, msg_origport(msg), msg_orignode(msg)); |
| 1492 | msg_set_importance(&port->phdr, msg_importance(msg)); |
| 1493 | sock->state = SS_CONNECTED; |
| 1494 | |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1495 | /* If an incoming message is an 'ACK-', it should be |
| 1496 | * discarded here because it doesn't contain useful |
| 1497 | * data. In addition, we should try to wake up |
| 1498 | * connect() routine if sleeping. |
| 1499 | */ |
| 1500 | if (msg_data_sz(msg) == 0) { |
| 1501 | kfree_skb(*buf); |
| 1502 | *buf = NULL; |
| 1503 | if (waitqueue_active(sk_sleep(sk))) |
| 1504 | wake_up_interruptible(sk_sleep(sk)); |
| 1505 | } |
| 1506 | retval = TIPC_OK; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1507 | break; |
| 1508 | case SS_LISTENING: |
| 1509 | case SS_UNCONNECTED: |
| 1510 | /* Accept only SYN message */ |
| 1511 | if (!msg_connected(msg) && !(msg_errcode(msg))) |
| 1512 | retval = TIPC_OK; |
| 1513 | break; |
| 1514 | case SS_DISCONNECTING: |
| 1515 | break; |
| 1516 | default: |
| 1517 | pr_err("Unknown socket state %u\n", sock->state); |
| 1518 | } |
| 1519 | return retval; |
| 1520 | } |
| 1521 | |
| 1522 | /** |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1523 | * rcvbuf_limit - get proper overload limit of socket receive queue |
| 1524 | * @sk: socket |
| 1525 | * @buf: message |
| 1526 | * |
| 1527 | * For all connection oriented messages, irrespective of importance, |
| 1528 | * the default overload value (i.e. 67MB) is set as limit. |
| 1529 | * |
| 1530 | * For all connectionless messages, by default new queue limits are |
| 1531 | * as belows: |
| 1532 | * |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 1533 | * TIPC_LOW_IMPORTANCE (4 MB) |
| 1534 | * TIPC_MEDIUM_IMPORTANCE (8 MB) |
| 1535 | * TIPC_HIGH_IMPORTANCE (16 MB) |
| 1536 | * TIPC_CRITICAL_IMPORTANCE (32 MB) |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1537 | * |
| 1538 | * Returns overload limit according to corresponding message importance |
| 1539 | */ |
| 1540 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) |
| 1541 | { |
| 1542 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1543 | |
| 1544 | if (msg_connected(msg)) |
wangweidong | 0cee6bb | 2013-12-12 09:36:39 +0800 | [diff] [blame] | 1545 | return sysctl_tipc_rmem[2]; |
| 1546 | |
| 1547 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << |
| 1548 | msg_importance(msg); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1549 | } |
| 1550 | |
| 1551 | /** |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1552 | * filter_rcv - validate incoming message |
| 1553 | * @sk: socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1554 | * @buf: message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1555 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1556 | * Enqueues message on receive queue if acceptable; optionally handles |
| 1557 | * disconnect indication for a connected socket. |
| 1558 | * |
| 1559 | * Called with socket lock already taken; port lock may also be taken. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1560 | * |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1561 | * 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] | 1562 | * 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] | 1563 | */ |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1564 | static int filter_rcv(struct sock *sk, struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1565 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1566 | struct socket *sock = sk->sk_socket; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1567 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1568 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1569 | unsigned int limit = rcvbuf_limit(sk, buf); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1570 | u32 onode; |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1571 | int rc = TIPC_OK; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1572 | |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1573 | if (unlikely(msg_user(msg) == CONN_MANAGER)) |
| 1574 | return tipc_sk_proto_rcv(tsk, &onode, buf); |
Jon Paul Maloy | ec8a2e5 | 2014-06-25 20:41:40 -0500 | [diff] [blame] | 1575 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1576 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
| 1577 | kfree_skb(buf); |
| 1578 | tsk->link_cong = 0; |
| 1579 | sk->sk_write_space(sk); |
| 1580 | return TIPC_OK; |
| 1581 | } |
| 1582 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1583 | /* Reject message if it is wrong sort of message for socket */ |
Allan Stephens | aad5854 | 2012-04-26 18:13:08 -0400 | [diff] [blame] | 1584 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1585 | return -TIPC_ERR_NO_PORT; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1586 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1587 | if (sock->state == SS_READY) { |
Allan Stephens | b29f142 | 2010-12-31 18:59:25 +0000 | [diff] [blame] | 1588 | if (msg_connected(msg)) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1589 | return -TIPC_ERR_NO_PORT; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1590 | } else { |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1591 | rc = filter_connect(tsk, &buf); |
| 1592 | if (rc != TIPC_OK || buf == NULL) |
| 1593 | return rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1594 | } |
| 1595 | |
| 1596 | /* Reject message if there isn't room to queue it */ |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1597 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1598 | return -TIPC_ERR_OVERLOAD; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1599 | |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1600 | /* Enqueue message */ |
Ying Xue | 4068243 | 2013-10-18 07:23:16 +0200 | [diff] [blame] | 1601 | TIPC_SKB_CB(buf)->handle = NULL; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1602 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1603 | skb_set_owner_r(buf, sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1604 | |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1605 | sk->sk_data_ready(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1606 | return TIPC_OK; |
| 1607 | } |
| 1608 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1609 | /** |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1610 | * tipc_backlog_rcv - handle incoming message from backlog queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1611 | * @sk: socket |
| 1612 | * @buf: message |
| 1613 | * |
| 1614 | * Caller must hold socket lock, but not port lock. |
| 1615 | * |
| 1616 | * Returns 0 |
| 1617 | */ |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1618 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1619 | { |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1620 | int rc; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1621 | u32 onode; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1622 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 02c00c2 | 2014-06-09 11:08:18 -0500 | [diff] [blame] | 1623 | uint truesize = buf->truesize; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1624 | |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1625 | rc = filter_rcv(sk, buf); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1626 | |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1627 | if (likely(!rc)) { |
| 1628 | if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT) |
| 1629 | atomic_add(truesize, &tsk->dupl_rcvcnt); |
| 1630 | return 0; |
| 1631 | } |
| 1632 | |
| 1633 | if ((rc < 0) && !tipc_msg_reverse(buf, &onode, -rc)) |
| 1634 | return 0; |
| 1635 | |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1636 | tipc_link_xmit(buf, onode, 0); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1637 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1638 | return 0; |
| 1639 | } |
| 1640 | |
| 1641 | /** |
Jon Paul Maloy | 24be34b | 2014-03-12 11:31:10 -0400 | [diff] [blame] | 1642 | * tipc_sk_rcv - handle incoming message |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1643 | * @buf: buffer containing arriving message |
| 1644 | * Consumes buffer |
| 1645 | * Returns 0 if success, or errno: -EHOSTUNREACH |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1646 | */ |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1647 | int tipc_sk_rcv(struct sk_buff *buf) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1648 | { |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1649 | struct tipc_sock *tsk; |
| 1650 | struct tipc_port *port; |
| 1651 | struct sock *sk; |
| 1652 | u32 dport = msg_destport(buf_msg(buf)); |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1653 | int rc = TIPC_OK; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1654 | uint limit; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1655 | u32 dnode; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1656 | |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1657 | /* Validate destination and message */ |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1658 | port = tipc_port_lock(dport); |
| 1659 | if (unlikely(!port)) { |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1660 | rc = tipc_msg_eval(buf, &dnode); |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1661 | goto exit; |
| 1662 | } |
| 1663 | |
| 1664 | tsk = tipc_port_to_sock(port); |
| 1665 | sk = &tsk->sk; |
| 1666 | |
| 1667 | /* Queue message */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1668 | bh_lock_sock(sk); |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1669 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1670 | if (!sock_owned_by_user(sk)) { |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1671 | rc = filter_rcv(sk, buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1672 | } else { |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1673 | if (sk->sk_backlog.len == 0) |
| 1674 | atomic_set(&tsk->dupl_rcvcnt, 0); |
| 1675 | limit = rcvbuf_limit(sk, buf) + atomic_read(&tsk->dupl_rcvcnt); |
| 1676 | if (sk_add_backlog(sk, buf, limit)) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1677 | rc = -TIPC_ERR_OVERLOAD; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1678 | } |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1679 | bh_unlock_sock(sk); |
| 1680 | tipc_port_unlock(port); |
| 1681 | |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1682 | if (likely(!rc)) |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1683 | return 0; |
| 1684 | exit: |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1685 | if ((rc < 0) && !tipc_msg_reverse(buf, &dnode, -rc)) |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1686 | return -EHOSTUNREACH; |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1687 | |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1688 | tipc_link_xmit(buf, dnode, 0); |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1689 | return (rc < 0) ? -EHOSTUNREACH : 0; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1690 | } |
| 1691 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1692 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
| 1693 | { |
| 1694 | struct sock *sk = sock->sk; |
| 1695 | DEFINE_WAIT(wait); |
| 1696 | int done; |
| 1697 | |
| 1698 | do { |
| 1699 | int err = sock_error(sk); |
| 1700 | if (err) |
| 1701 | return err; |
| 1702 | if (!*timeo_p) |
| 1703 | return -ETIMEDOUT; |
| 1704 | if (signal_pending(current)) |
| 1705 | return sock_intr_errno(*timeo_p); |
| 1706 | |
| 1707 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
| 1708 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); |
| 1709 | finish_wait(sk_sleep(sk), &wait); |
| 1710 | } while (!done); |
| 1711 | return 0; |
| 1712 | } |
| 1713 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1714 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1715 | * tipc_connect - establish a connection to another TIPC port |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1716 | * @sock: socket structure |
| 1717 | * @dest: socket address for destination port |
| 1718 | * @destlen: size of socket address data structure |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1719 | * @flags: file-related flags associated with socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1720 | * |
| 1721 | * Returns 0 on success, errno otherwise |
| 1722 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1723 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
| 1724 | int destlen, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1725 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1726 | struct sock *sk = sock->sk; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1727 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
| 1728 | struct msghdr m = {NULL,}; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1729 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
| 1730 | socket_state previous; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1731 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1732 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1733 | lock_sock(sk); |
| 1734 | |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1735 | /* 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] | 1736 | if (sock->state == SS_READY) { |
| 1737 | res = -EOPNOTSUPP; |
| 1738 | goto exit; |
| 1739 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1740 | |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1741 | /* |
| 1742 | * Reject connection attempt using multicast address |
| 1743 | * |
| 1744 | * Note: send_msg() validates the rest of the address fields, |
| 1745 | * so there's no need to do it here |
| 1746 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1747 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
| 1748 | res = -EINVAL; |
| 1749 | goto exit; |
| 1750 | } |
| 1751 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1752 | previous = sock->state; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1753 | switch (sock->state) { |
| 1754 | case SS_UNCONNECTED: |
| 1755 | /* Send a 'SYN-' to destination */ |
| 1756 | m.msg_name = dest; |
| 1757 | m.msg_namelen = destlen; |
| 1758 | |
| 1759 | /* If connect is in non-blocking case, set MSG_DONTWAIT to |
| 1760 | * indicate send_msg() is never blocked. |
| 1761 | */ |
| 1762 | if (!timeout) |
| 1763 | m.msg_flags = MSG_DONTWAIT; |
| 1764 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1765 | res = tipc_sendmsg(NULL, sock, &m, 0); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1766 | if ((res < 0) && (res != -EWOULDBLOCK)) |
| 1767 | goto exit; |
| 1768 | |
| 1769 | /* Just entered SS_CONNECTING state; the only |
| 1770 | * difference is that return value in non-blocking |
| 1771 | * case is EINPROGRESS, rather than EALREADY. |
| 1772 | */ |
| 1773 | res = -EINPROGRESS; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1774 | case SS_CONNECTING: |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1775 | if (previous == SS_CONNECTING) |
| 1776 | res = -EALREADY; |
| 1777 | if (!timeout) |
| 1778 | goto exit; |
| 1779 | timeout = msecs_to_jiffies(timeout); |
| 1780 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ |
| 1781 | res = tipc_wait_for_connect(sock, &timeout); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1782 | break; |
| 1783 | case SS_CONNECTED: |
| 1784 | res = -EISCONN; |
| 1785 | break; |
| 1786 | default: |
| 1787 | res = -EINVAL; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1788 | break; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1789 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1790 | exit: |
| 1791 | release_sock(sk); |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1792 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1793 | } |
| 1794 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1795 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1796 | * tipc_listen - allow socket to listen for incoming connections |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1797 | * @sock: socket structure |
| 1798 | * @len: (unused) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1799 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1800 | * Returns 0 on success, errno otherwise |
| 1801 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1802 | static int tipc_listen(struct socket *sock, int len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1803 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1804 | struct sock *sk = sock->sk; |
| 1805 | int res; |
| 1806 | |
| 1807 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1808 | |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 1809 | if (sock->state != SS_UNCONNECTED) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1810 | res = -EINVAL; |
| 1811 | else { |
| 1812 | sock->state = SS_LISTENING; |
| 1813 | res = 0; |
| 1814 | } |
| 1815 | |
| 1816 | release_sock(sk); |
| 1817 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1818 | } |
| 1819 | |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1820 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
| 1821 | { |
| 1822 | struct sock *sk = sock->sk; |
| 1823 | DEFINE_WAIT(wait); |
| 1824 | int err; |
| 1825 | |
| 1826 | /* True wake-one mechanism for incoming connections: only |
| 1827 | * one process gets woken up, not the 'whole herd'. |
| 1828 | * Since we do not 'race & poll' for established sockets |
| 1829 | * anymore, the common case will execute the loop only once. |
| 1830 | */ |
| 1831 | for (;;) { |
| 1832 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, |
| 1833 | TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 1834 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1835 | release_sock(sk); |
| 1836 | timeo = schedule_timeout(timeo); |
| 1837 | lock_sock(sk); |
| 1838 | } |
| 1839 | err = 0; |
| 1840 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 1841 | break; |
| 1842 | err = -EINVAL; |
| 1843 | if (sock->state != SS_LISTENING) |
| 1844 | break; |
| 1845 | err = sock_intr_errno(timeo); |
| 1846 | if (signal_pending(current)) |
| 1847 | break; |
| 1848 | err = -EAGAIN; |
| 1849 | if (!timeo) |
| 1850 | break; |
| 1851 | } |
| 1852 | finish_wait(sk_sleep(sk), &wait); |
| 1853 | return err; |
| 1854 | } |
| 1855 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1856 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1857 | * tipc_accept - wait for connection request |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1858 | * @sock: listening socket |
| 1859 | * @newsock: new socket that is to be connected |
| 1860 | * @flags: file-related flags associated with socket |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1861 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1862 | * Returns 0 on success, errno otherwise |
| 1863 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1864 | 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] | 1865 | { |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1866 | struct sock *new_sk, *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1867 | struct sk_buff *buf; |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1868 | struct tipc_port *new_port; |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1869 | struct tipc_msg *msg; |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1870 | long timeo; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1871 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1872 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1873 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1874 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1875 | if (sock->state != SS_LISTENING) { |
| 1876 | res = -EINVAL; |
| 1877 | goto exit; |
| 1878 | } |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1879 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 1880 | res = tipc_wait_for_accept(sock, timeo); |
| 1881 | if (res) |
| 1882 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1883 | |
| 1884 | buf = skb_peek(&sk->sk_receive_queue); |
| 1885 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 1886 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1887 | if (res) |
| 1888 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1889 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1890 | new_sk = new_sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1891 | new_port = &tipc_sk(new_sk)->port; |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1892 | msg = buf_msg(buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1893 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1894 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
| 1895 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1896 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1897 | /* |
| 1898 | * Reject any stray messages received by new socket |
| 1899 | * before the socket lock was taken (very, very unlikely) |
| 1900 | */ |
| 1901 | reject_rx_queue(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1902 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1903 | /* Connect new socket to it's peer */ |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1904 | tipc_sk_finish_conn(new_port, msg_origport(msg), msg_orignode(msg)); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1905 | new_sock->state = SS_CONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1906 | |
Jon Paul Maloy | 3b4f302 | 2014-03-12 11:31:11 -0400 | [diff] [blame] | 1907 | tipc_port_set_importance(new_port, msg_importance(msg)); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1908 | if (msg_named(msg)) { |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1909 | new_port->conn_type = msg_nametype(msg); |
| 1910 | new_port->conn_instance = msg_nameinst(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1911 | } |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1912 | |
| 1913 | /* |
| 1914 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. |
| 1915 | * Respond to 'SYN+' by queuing it on new socket. |
| 1916 | */ |
| 1917 | if (!msg_data_sz(msg)) { |
| 1918 | struct msghdr m = {NULL,}; |
| 1919 | |
| 1920 | advance_rx_queue(sk); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1921 | tipc_send_packet(NULL, new_sock, &m, 0); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1922 | } else { |
| 1923 | __skb_dequeue(&sk->sk_receive_queue); |
| 1924 | __skb_queue_head(&new_sk->sk_receive_queue, buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1925 | skb_set_owner_r(buf, new_sk); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1926 | } |
| 1927 | release_sock(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1928 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1929 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1930 | return res; |
| 1931 | } |
| 1932 | |
| 1933 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1934 | * tipc_shutdown - shutdown socket connection |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1935 | * @sock: socket structure |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 1936 | * @how: direction to close (must be SHUT_RDWR) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1937 | * |
| 1938 | * Terminates connection (if necessary), then purges socket's receive queue. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1939 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1940 | * Returns 0 on success, errno otherwise |
| 1941 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1942 | static int tipc_shutdown(struct socket *sock, int how) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1943 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1944 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1945 | struct tipc_sock *tsk = tipc_sk(sk); |
| 1946 | struct tipc_port *port = &tsk->port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1947 | struct sk_buff *buf; |
Jon Paul Maloy | 80e44c2 | 2014-08-22 18:09:10 -0400 | [diff] [blame] | 1948 | u32 dnode; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1949 | int res; |
| 1950 | |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 1951 | if (how != SHUT_RDWR) |
| 1952 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1953 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1954 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1955 | |
| 1956 | switch (sock->state) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1957 | case SS_CONNECTING: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1958 | case SS_CONNECTED: |
| 1959 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1960 | restart: |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 1961 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1962 | buf = __skb_dequeue(&sk->sk_receive_queue); |
| 1963 | if (buf) { |
Ying Xue | 4068243 | 2013-10-18 07:23:16 +0200 | [diff] [blame] | 1964 | if (TIPC_SKB_CB(buf)->handle != NULL) { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 1965 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1966 | goto restart; |
| 1967 | } |
Jon Paul Maloy | 80e44c2 | 2014-08-22 18:09:10 -0400 | [diff] [blame] | 1968 | if (tipc_msg_reverse(buf, &dnode, TIPC_CONN_SHUTDOWN)) |
| 1969 | tipc_link_xmit(buf, dnode, port->ref); |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1970 | tipc_node_remove_conn(dnode, port->ref); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1971 | } else { |
Jon Paul Maloy | 80e44c2 | 2014-08-22 18:09:10 -0400 | [diff] [blame] | 1972 | dnode = tipc_port_peernode(port); |
| 1973 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
| 1974 | TIPC_CONN_MSG, SHORT_H_SIZE, |
| 1975 | 0, dnode, tipc_own_addr, |
| 1976 | tipc_port_peerport(port), |
| 1977 | port->ref, TIPC_CONN_SHUTDOWN); |
| 1978 | tipc_link_xmit(buf, dnode, port->ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1979 | } |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1980 | port->connected = 0; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1981 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1982 | tipc_node_remove_conn(dnode, port->ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1983 | /* fall through */ |
| 1984 | |
| 1985 | case SS_DISCONNECTING: |
| 1986 | |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 1987 | /* Discard any unreceived messages */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 1988 | __skb_queue_purge(&sk->sk_receive_queue); |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 1989 | |
| 1990 | /* Wake up anyone sleeping in poll */ |
| 1991 | sk->sk_state_change(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1992 | res = 0; |
| 1993 | break; |
| 1994 | |
| 1995 | default: |
| 1996 | res = -ENOTCONN; |
| 1997 | } |
| 1998 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1999 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2000 | return res; |
| 2001 | } |
| 2002 | |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2003 | static void tipc_sk_timeout(unsigned long ref) |
| 2004 | { |
| 2005 | struct tipc_port *port = tipc_port_lock(ref); |
| 2006 | struct tipc_sock *tsk; |
| 2007 | struct sock *sk; |
| 2008 | struct sk_buff *buf = NULL; |
| 2009 | struct tipc_msg *msg = NULL; |
| 2010 | u32 peer_port, peer_node; |
| 2011 | |
| 2012 | if (!port) |
| 2013 | return; |
| 2014 | |
| 2015 | if (!port->connected) { |
| 2016 | tipc_port_unlock(port); |
| 2017 | return; |
| 2018 | } |
| 2019 | tsk = tipc_port_to_sock(port); |
| 2020 | sk = &tsk->sk; |
| 2021 | bh_lock_sock(sk); |
| 2022 | peer_port = tipc_port_peerport(port); |
| 2023 | peer_node = tipc_port_peernode(port); |
| 2024 | |
| 2025 | if (port->probing_state == TIPC_CONN_PROBING) { |
| 2026 | /* Previous probe not answered -> self abort */ |
| 2027 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, |
| 2028 | SHORT_H_SIZE, 0, tipc_own_addr, |
| 2029 | peer_node, ref, peer_port, |
| 2030 | TIPC_ERR_NO_PORT); |
| 2031 | } else { |
| 2032 | buf = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, |
| 2033 | 0, peer_node, tipc_own_addr, |
| 2034 | peer_port, ref, TIPC_OK); |
| 2035 | port->probing_state = TIPC_CONN_PROBING; |
| 2036 | k_start_timer(&port->timer, port->probing_interval); |
| 2037 | } |
| 2038 | bh_unlock_sock(sk); |
| 2039 | tipc_port_unlock(port); |
| 2040 | if (!buf) |
| 2041 | return; |
| 2042 | |
| 2043 | msg = buf_msg(buf); |
| 2044 | tipc_link_xmit(buf, msg_destnode(msg), msg_link_selector(msg)); |
| 2045 | } |
| 2046 | |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame^] | 2047 | static int tipc_sk_show(struct tipc_port *port, char *buf, |
| 2048 | int len, int full_id) |
| 2049 | { |
| 2050 | struct publication *publ; |
| 2051 | int ret; |
| 2052 | |
| 2053 | if (full_id) |
| 2054 | ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:", |
| 2055 | tipc_zone(tipc_own_addr), |
| 2056 | tipc_cluster(tipc_own_addr), |
| 2057 | tipc_node(tipc_own_addr), port->ref); |
| 2058 | else |
| 2059 | ret = tipc_snprintf(buf, len, "%-10u:", port->ref); |
| 2060 | |
| 2061 | if (port->connected) { |
| 2062 | u32 dport = tipc_port_peerport(port); |
| 2063 | u32 destnode = tipc_port_peernode(port); |
| 2064 | |
| 2065 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2066 | " connected to <%u.%u.%u:%u>", |
| 2067 | tipc_zone(destnode), |
| 2068 | tipc_cluster(destnode), |
| 2069 | tipc_node(destnode), dport); |
| 2070 | if (port->conn_type != 0) |
| 2071 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2072 | " via {%u,%u}", port->conn_type, |
| 2073 | port->conn_instance); |
| 2074 | } else if (port->published) { |
| 2075 | ret += tipc_snprintf(buf + ret, len - ret, " bound to"); |
| 2076 | list_for_each_entry(publ, &port->publications, pport_list) { |
| 2077 | if (publ->lower == publ->upper) |
| 2078 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2079 | " {%u,%u}", publ->type, |
| 2080 | publ->lower); |
| 2081 | else |
| 2082 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2083 | " {%u,%u,%u}", publ->type, |
| 2084 | publ->lower, publ->upper); |
| 2085 | } |
| 2086 | } |
| 2087 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); |
| 2088 | return ret; |
| 2089 | } |
| 2090 | |
| 2091 | struct sk_buff *tipc_sk_socks_show(void) |
| 2092 | { |
| 2093 | struct sk_buff *buf; |
| 2094 | struct tlv_desc *rep_tlv; |
| 2095 | char *pb; |
| 2096 | int pb_len; |
| 2097 | struct tipc_sock *tsk; |
| 2098 | int str_len = 0; |
| 2099 | u32 ref = 0; |
| 2100 | |
| 2101 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); |
| 2102 | if (!buf) |
| 2103 | return NULL; |
| 2104 | rep_tlv = (struct tlv_desc *)buf->data; |
| 2105 | pb = TLV_DATA(rep_tlv); |
| 2106 | pb_len = ULTRA_STRING_MAX_LEN; |
| 2107 | |
| 2108 | tsk = tipc_sk_lock_next(&ref); |
| 2109 | for (; tsk; tsk = tipc_sk_lock_next(&ref)) { |
| 2110 | bh_lock_sock(&tsk->sk); |
| 2111 | str_len += tipc_sk_show(&tsk->port, pb + str_len, |
| 2112 | pb_len - str_len, 0); |
| 2113 | bh_unlock_sock(&tsk->sk); |
| 2114 | tipc_port_unlock(&tsk->port); |
| 2115 | } |
| 2116 | str_len += 1; /* for "\0" */ |
| 2117 | skb_put(buf, TLV_SPACE(str_len)); |
| 2118 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); |
| 2119 | |
| 2120 | return buf; |
| 2121 | } |
| 2122 | |
| 2123 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
| 2124 | * when we go from standalone to network mode. |
| 2125 | */ |
| 2126 | void tipc_sk_reinit(void) |
| 2127 | { |
| 2128 | struct tipc_msg *msg; |
| 2129 | u32 ref = 0; |
| 2130 | struct tipc_sock *tsk = tipc_sk_lock_next(&ref); |
| 2131 | |
| 2132 | for (; tsk; tsk = tipc_sk_lock_next(&ref)) { |
| 2133 | bh_lock_sock(&tsk->sk); |
| 2134 | msg = &tsk->port.phdr; |
| 2135 | msg_set_prevnode(msg, tipc_own_addr); |
| 2136 | msg_set_orignode(msg, tipc_own_addr); |
| 2137 | bh_unlock_sock(&tsk->sk); |
| 2138 | tipc_port_unlock(&tsk->port); |
| 2139 | } |
| 2140 | } |
| 2141 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2142 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2143 | * tipc_setsockopt - set socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2144 | * @sock: socket structure |
| 2145 | * @lvl: option level |
| 2146 | * @opt: option identifier |
| 2147 | * @ov: pointer to new option value |
| 2148 | * @ol: length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2149 | * |
| 2150 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2151 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2152 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2153 | * Returns 0 on success, errno otherwise |
| 2154 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2155 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
| 2156 | char __user *ov, unsigned int ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2157 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2158 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2159 | struct tipc_sock *tsk = tipc_sk(sk); |
| 2160 | struct tipc_port *port = &tsk->port; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2161 | u32 value; |
| 2162 | int res; |
| 2163 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2164 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 2165 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2166 | if (lvl != SOL_TIPC) |
| 2167 | return -ENOPROTOOPT; |
| 2168 | if (ol < sizeof(value)) |
| 2169 | return -EINVAL; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 2170 | res = get_user(value, (u32 __user *)ov); |
| 2171 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2172 | return res; |
| 2173 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2174 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2175 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2176 | switch (opt) { |
| 2177 | case TIPC_IMPORTANCE: |
Erik Hugne | ac32c7f | 2014-08-15 16:44:35 +0200 | [diff] [blame] | 2178 | res = tipc_port_set_importance(port, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2179 | break; |
| 2180 | case TIPC_SRC_DROPPABLE: |
| 2181 | if (sock->type != SOCK_STREAM) |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2182 | tipc_port_set_unreliable(port, value); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2183 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2184 | res = -ENOPROTOOPT; |
| 2185 | break; |
| 2186 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2187 | tipc_port_set_unreturnable(port, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2188 | break; |
| 2189 | case TIPC_CONN_TIMEOUT: |
Allan Stephens | a0f40f0 | 2011-05-26 13:44:34 -0400 | [diff] [blame] | 2190 | tipc_sk(sk)->conn_timeout = value; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2191 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2192 | break; |
| 2193 | default: |
| 2194 | res = -EINVAL; |
| 2195 | } |
| 2196 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2197 | release_sock(sk); |
| 2198 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2199 | return res; |
| 2200 | } |
| 2201 | |
| 2202 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2203 | * tipc_getsockopt - get socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2204 | * @sock: socket structure |
| 2205 | * @lvl: option level |
| 2206 | * @opt: option identifier |
| 2207 | * @ov: receptacle for option value |
| 2208 | * @ol: receptacle for length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2209 | * |
| 2210 | * 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] | 2211 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2212 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2213 | * Returns 0 on success, errno otherwise |
| 2214 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2215 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
| 2216 | char __user *ov, int __user *ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2217 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2218 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2219 | struct tipc_sock *tsk = tipc_sk(sk); |
| 2220 | struct tipc_port *port = &tsk->port; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2221 | int len; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2222 | u32 value; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2223 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2224 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2225 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 2226 | return put_user(0, ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2227 | if (lvl != SOL_TIPC) |
| 2228 | return -ENOPROTOOPT; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 2229 | res = get_user(len, ol); |
| 2230 | if (res) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2231 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2232 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2233 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2234 | |
| 2235 | switch (opt) { |
| 2236 | case TIPC_IMPORTANCE: |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2237 | value = tipc_port_importance(port); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2238 | break; |
| 2239 | case TIPC_SRC_DROPPABLE: |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2240 | value = tipc_port_unreliable(port); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2241 | break; |
| 2242 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2243 | value = tipc_port_unreturnable(port); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2244 | break; |
| 2245 | case TIPC_CONN_TIMEOUT: |
Allan Stephens | a0f40f0 | 2011-05-26 13:44:34 -0400 | [diff] [blame] | 2246 | value = tipc_sk(sk)->conn_timeout; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2247 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2248 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2249 | case TIPC_NODE_RECVQ_DEPTH: |
Ying Xue | 9da3d47 | 2012-11-27 06:15:27 -0500 | [diff] [blame] | 2250 | value = 0; /* was tipc_queue_size, now obsolete */ |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2251 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2252 | case TIPC_SOCK_RECVQ_DEPTH: |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2253 | value = skb_queue_len(&sk->sk_receive_queue); |
| 2254 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2255 | default: |
| 2256 | res = -EINVAL; |
| 2257 | } |
| 2258 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2259 | release_sock(sk); |
| 2260 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2261 | if (res) |
| 2262 | return res; /* "get" failed */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2263 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2264 | if (len < sizeof(value)) |
| 2265 | return -EINVAL; |
| 2266 | |
| 2267 | if (copy_to_user(ov, &value, sizeof(value))) |
| 2268 | return -EFAULT; |
| 2269 | |
| 2270 | return put_user(sizeof(value), ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2271 | } |
| 2272 | |
Wei Yongjun | 52f50ce | 2014-07-20 13:14:28 +0800 | [diff] [blame] | 2273 | 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] | 2274 | { |
| 2275 | struct tipc_sioc_ln_req lnr; |
| 2276 | void __user *argp = (void __user *)arg; |
| 2277 | |
| 2278 | switch (cmd) { |
| 2279 | case SIOCGETLINKNAME: |
| 2280 | if (copy_from_user(&lnr, argp, sizeof(lnr))) |
| 2281 | return -EFAULT; |
| 2282 | if (!tipc_node_get_linkname(lnr.bearer_id, lnr.peer, |
| 2283 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
| 2284 | if (copy_to_user(argp, &lnr, sizeof(lnr))) |
| 2285 | return -EFAULT; |
| 2286 | return 0; |
| 2287 | } |
| 2288 | return -EADDRNOTAVAIL; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2289 | default: |
| 2290 | return -ENOIOCTLCMD; |
| 2291 | } |
| 2292 | } |
| 2293 | |
Ben Hutchings | ae86b9e | 2012-07-10 10:55:35 +0000 | [diff] [blame] | 2294 | /* Protocol switches for the various types of TIPC sockets */ |
| 2295 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2296 | static const struct proto_ops msg_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2297 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2298 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2299 | .release = tipc_release, |
| 2300 | .bind = tipc_bind, |
| 2301 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2302 | .socketpair = sock_no_socketpair, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2303 | .accept = sock_no_accept, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2304 | .getname = tipc_getname, |
| 2305 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2306 | .ioctl = tipc_ioctl, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2307 | .listen = sock_no_listen, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2308 | .shutdown = tipc_shutdown, |
| 2309 | .setsockopt = tipc_setsockopt, |
| 2310 | .getsockopt = tipc_getsockopt, |
| 2311 | .sendmsg = tipc_sendmsg, |
| 2312 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2313 | .mmap = sock_no_mmap, |
| 2314 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2315 | }; |
| 2316 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2317 | static const struct proto_ops packet_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2318 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2319 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2320 | .release = tipc_release, |
| 2321 | .bind = tipc_bind, |
| 2322 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2323 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2324 | .accept = tipc_accept, |
| 2325 | .getname = tipc_getname, |
| 2326 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2327 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2328 | .listen = tipc_listen, |
| 2329 | .shutdown = tipc_shutdown, |
| 2330 | .setsockopt = tipc_setsockopt, |
| 2331 | .getsockopt = tipc_getsockopt, |
| 2332 | .sendmsg = tipc_send_packet, |
| 2333 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2334 | .mmap = sock_no_mmap, |
| 2335 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2336 | }; |
| 2337 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2338 | static const struct proto_ops stream_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2339 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2340 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2341 | .release = tipc_release, |
| 2342 | .bind = tipc_bind, |
| 2343 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2344 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2345 | .accept = tipc_accept, |
| 2346 | .getname = tipc_getname, |
| 2347 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2348 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2349 | .listen = tipc_listen, |
| 2350 | .shutdown = tipc_shutdown, |
| 2351 | .setsockopt = tipc_setsockopt, |
| 2352 | .getsockopt = tipc_getsockopt, |
| 2353 | .sendmsg = tipc_send_stream, |
| 2354 | .recvmsg = tipc_recv_stream, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2355 | .mmap = sock_no_mmap, |
| 2356 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2357 | }; |
| 2358 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2359 | static const struct net_proto_family tipc_family_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2360 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2361 | .family = AF_TIPC, |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2362 | .create = tipc_sk_create |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2363 | }; |
| 2364 | |
| 2365 | static struct proto tipc_proto = { |
| 2366 | .name = "TIPC", |
| 2367 | .owner = THIS_MODULE, |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 2368 | .obj_size = sizeof(struct tipc_sock), |
| 2369 | .sysctl_rmem = sysctl_tipc_rmem |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2370 | }; |
| 2371 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2372 | static struct proto tipc_proto_kern = { |
| 2373 | .name = "TIPC", |
| 2374 | .obj_size = sizeof(struct tipc_sock), |
| 2375 | .sysctl_rmem = sysctl_tipc_rmem |
| 2376 | }; |
| 2377 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2378 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2379 | * tipc_socket_init - initialize TIPC socket interface |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2380 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2381 | * Returns 0 on success, errno otherwise |
| 2382 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2383 | int tipc_socket_init(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2384 | { |
| 2385 | int res; |
| 2386 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2387 | res = proto_register(&tipc_proto, 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2388 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2389 | pr_err("Failed to register TIPC protocol type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2390 | goto out; |
| 2391 | } |
| 2392 | |
| 2393 | res = sock_register(&tipc_family_ops); |
| 2394 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2395 | pr_err("Failed to register TIPC socket type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2396 | proto_unregister(&tipc_proto); |
| 2397 | goto out; |
| 2398 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2399 | out: |
| 2400 | return res; |
| 2401 | } |
| 2402 | |
| 2403 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2404 | * tipc_socket_stop - stop TIPC socket interface |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2405 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2406 | void tipc_socket_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2407 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2408 | sock_unregister(tipc_family_ops.family); |
| 2409 | proto_unregister(&tipc_proto); |
| 2410 | } |