Commit | Line | Data |
---|---|---|
b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
8826cde6 | 4 | * Copyright (c) 2001-2007, 2012-2014, Ericsson AB |
c5fa7b3c | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
b97bf3fd | 37 | #include "core.h" |
d265fef6 | 38 | #include "port.h" |
e2dafe87 | 39 | #include "name_table.h" |
78acb1f9 | 40 | #include "node.h" |
e2dafe87 | 41 | #include "link.h" |
2cf8aa19 | 42 | #include <linux/export.h> |
5a9ee0be | 43 | #include "config.h" |
2cf8aa19 | 44 | |
b97bf3fd PL |
45 | #define SS_LISTENING -1 /* socket is listening */ |
46 | #define SS_READY -2 /* socket is connectionless */ | |
47 | ||
3654ea02 | 48 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
dadebc00 | 49 | #define CONN_PROBING_INTERVAL 3600000 /* [ms] => 1 h */ |
ac0074ee | 50 | #define TIPC_FWD_MSG 1 |
b97bf3fd | 51 | |
4f4482dc | 52 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 53 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 54 | static void tipc_write_space(struct sock *sk); |
247f0f3c YX |
55 | static int tipc_release(struct socket *sock); |
56 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 57 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
57289015 | 58 | static void tipc_sk_timeout(unsigned long ref); |
b97bf3fd | 59 | |
bca65eae FW |
60 | static const struct proto_ops packet_ops; |
61 | static const struct proto_ops stream_ops; | |
62 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
63 | |
64 | static struct proto tipc_proto; | |
c5fa7b3c | 65 | static struct proto tipc_proto_kern; |
b97bf3fd | 66 | |
c4307285 | 67 | /* |
0c3141e9 AS |
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 | |
110 | */ | |
111 | ||
8826cde6 JPM |
112 | #include "socket.h" |
113 | ||
5a9ee0be JPM |
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 | { | |
9b50fd08 | 118 | return (struct tipc_sock *)tipc_ref_lock_next(ref); |
5a9ee0be JPM |
119 | } |
120 | ||
0c3141e9 AS |
121 | /** |
122 | * advance_rx_queue - discard first buffer in socket receive queue | |
123 | * | |
124 | * Caller must hold socket lock | |
b97bf3fd | 125 | */ |
0c3141e9 | 126 | static void advance_rx_queue(struct sock *sk) |
b97bf3fd | 127 | { |
5f6d9123 | 128 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
129 | } |
130 | ||
b97bf3fd | 131 | /** |
0c3141e9 AS |
132 | * reject_rx_queue - reject all buffers in socket receive queue |
133 | * | |
134 | * Caller must hold socket lock | |
b97bf3fd | 135 | */ |
0c3141e9 | 136 | static void reject_rx_queue(struct sock *sk) |
b97bf3fd | 137 | { |
0c3141e9 | 138 | struct sk_buff *buf; |
8db1bae3 | 139 | u32 dnode; |
0c3141e9 | 140 | |
8db1bae3 JPM |
141 | while ((buf = __skb_dequeue(&sk->sk_receive_queue))) { |
142 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) | |
9fbfb8b1 | 143 | tipc_link_xmit(buf, dnode, 0); |
8db1bae3 | 144 | } |
b97bf3fd PL |
145 | } |
146 | ||
147 | /** | |
c5fa7b3c | 148 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 149 | * @net: network namespace (must be default network) |
b97bf3fd PL |
150 | * @sock: pre-allocated socket structure |
151 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 152 | * @kern: caused by kernel or by userspace? |
c4307285 | 153 | * |
0c3141e9 AS |
154 | * This routine creates additional data structures used by the TIPC socket, |
155 | * initializes them, and links them together. | |
b97bf3fd PL |
156 | * |
157 | * Returns 0 on success, errno otherwise | |
158 | */ | |
58ed9442 JPM |
159 | static int tipc_sk_create(struct net *net, struct socket *sock, |
160 | int protocol, int kern) | |
b97bf3fd | 161 | { |
0c3141e9 AS |
162 | const struct proto_ops *ops; |
163 | socket_state state; | |
b97bf3fd | 164 | struct sock *sk; |
58ed9442 JPM |
165 | struct tipc_sock *tsk; |
166 | struct tipc_port *port; | |
5b8fa7ce | 167 | struct tipc_msg *msg; |
58ed9442 | 168 | u32 ref; |
0c3141e9 AS |
169 | |
170 | /* Validate arguments */ | |
b97bf3fd PL |
171 | if (unlikely(protocol != 0)) |
172 | return -EPROTONOSUPPORT; | |
173 | ||
b97bf3fd PL |
174 | switch (sock->type) { |
175 | case SOCK_STREAM: | |
0c3141e9 AS |
176 | ops = &stream_ops; |
177 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
178 | break; |
179 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
180 | ops = &packet_ops; |
181 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
182 | break; |
183 | case SOCK_DGRAM: | |
b97bf3fd | 184 | case SOCK_RDM: |
0c3141e9 AS |
185 | ops = &msg_ops; |
186 | state = SS_READY; | |
b97bf3fd | 187 | break; |
49978651 | 188 | default: |
49978651 | 189 | return -EPROTOTYPE; |
b97bf3fd PL |
190 | } |
191 | ||
0c3141e9 | 192 | /* Allocate socket's protocol area */ |
c5fa7b3c YX |
193 | if (!kern) |
194 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); | |
195 | else | |
196 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); | |
197 | ||
0c3141e9 | 198 | if (sk == NULL) |
b97bf3fd | 199 | return -ENOMEM; |
b97bf3fd | 200 | |
58ed9442 JPM |
201 | tsk = tipc_sk(sk); |
202 | port = &tsk->port; | |
9b50fd08 | 203 | ref = tipc_ref_acquire(tsk, &port->lock); |
58ed9442 | 204 | if (!ref) { |
5b8fa7ce | 205 | pr_warn("Socket create failed; reference table exhausted\n"); |
0c3141e9 AS |
206 | return -ENOMEM; |
207 | } | |
5b8fa7ce JPM |
208 | port->max_pkt = MAX_PKT_DEFAULT; |
209 | port->ref = ref; | |
210 | INIT_LIST_HEAD(&port->publications); | |
5b8fa7ce | 211 | |
5b8fa7ce JPM |
212 | msg = &port->phdr; |
213 | tipc_msg_init(msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
214 | NAMED_H_SIZE, 0); | |
215 | msg_set_origport(msg, ref); | |
b97bf3fd | 216 | |
0c3141e9 | 217 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
218 | sock->ops = ops; |
219 | sock->state = state; | |
0c3141e9 | 220 | sock_init_data(sock, sk); |
57289015 | 221 | k_init_timer(&port->timer, (Handler)tipc_sk_timeout, ref); |
4f4482dc | 222 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 223 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
224 | sk->sk_data_ready = tipc_data_ready; |
225 | sk->sk_write_space = tipc_write_space; | |
4f4482dc | 226 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 227 | tsk->sent_unacked = 0; |
4f4482dc | 228 | atomic_set(&tsk->dupl_rcvcnt, 0); |
58ed9442 | 229 | tipc_port_unlock(port); |
7ef43eba | 230 | |
0c3141e9 | 231 | if (sock->state == SS_READY) { |
58ed9442 | 232 | tipc_port_set_unreturnable(port, true); |
0c3141e9 | 233 | if (sock->type == SOCK_DGRAM) |
58ed9442 | 234 | tipc_port_set_unreliable(port, true); |
0c3141e9 | 235 | } |
b97bf3fd PL |
236 | return 0; |
237 | } | |
238 | ||
c5fa7b3c YX |
239 | /** |
240 | * tipc_sock_create_local - create TIPC socket from inside TIPC module | |
241 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET | |
242 | * | |
243 | * We cannot use sock_creat_kern here because it bumps module user count. | |
244 | * Since socket owner and creator is the same module we must make sure | |
245 | * that module count remains zero for module local sockets, otherwise | |
246 | * we cannot do rmmod. | |
247 | * | |
248 | * Returns 0 on success, errno otherwise | |
249 | */ | |
250 | int tipc_sock_create_local(int type, struct socket **res) | |
251 | { | |
252 | int rc; | |
c5fa7b3c YX |
253 | |
254 | rc = sock_create_lite(AF_TIPC, type, 0, res); | |
255 | if (rc < 0) { | |
256 | pr_err("Failed to create kernel socket\n"); | |
257 | return rc; | |
258 | } | |
259 | tipc_sk_create(&init_net, *res, 0, 1); | |
260 | ||
c5fa7b3c YX |
261 | return 0; |
262 | } | |
263 | ||
264 | /** | |
265 | * tipc_sock_release_local - release socket created by tipc_sock_create_local | |
266 | * @sock: the socket to be released. | |
267 | * | |
268 | * Module reference count is not incremented when such sockets are created, | |
269 | * so we must keep it from being decremented when they are released. | |
270 | */ | |
271 | void tipc_sock_release_local(struct socket *sock) | |
272 | { | |
247f0f3c | 273 | tipc_release(sock); |
c5fa7b3c YX |
274 | sock->ops = NULL; |
275 | sock_release(sock); | |
276 | } | |
277 | ||
278 | /** | |
279 | * tipc_sock_accept_local - accept a connection on a socket created | |
280 | * with tipc_sock_create_local. Use this function to avoid that | |
281 | * module reference count is inadvertently incremented. | |
282 | * | |
283 | * @sock: the accepting socket | |
284 | * @newsock: reference to the new socket to be created | |
285 | * @flags: socket flags | |
286 | */ | |
287 | ||
288 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, | |
ae8509c4 | 289 | int flags) |
c5fa7b3c YX |
290 | { |
291 | struct sock *sk = sock->sk; | |
292 | int ret; | |
293 | ||
294 | ret = sock_create_lite(sk->sk_family, sk->sk_type, | |
295 | sk->sk_protocol, newsock); | |
296 | if (ret < 0) | |
297 | return ret; | |
298 | ||
247f0f3c | 299 | ret = tipc_accept(sock, *newsock, flags); |
c5fa7b3c YX |
300 | if (ret < 0) { |
301 | sock_release(*newsock); | |
302 | return ret; | |
303 | } | |
304 | (*newsock)->ops = sock->ops; | |
305 | return ret; | |
306 | } | |
307 | ||
b97bf3fd | 308 | /** |
247f0f3c | 309 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
310 | * @sock: socket to destroy |
311 | * | |
312 | * This routine cleans up any messages that are still queued on the socket. | |
313 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
314 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
315 | * and any others are discarded. (If the first message on a STREAM socket | |
316 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 317 | * |
b97bf3fd PL |
318 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
319 | * are returned or discarded according to the "destination droppable" setting | |
320 | * specified for the message by the sender. | |
321 | * | |
322 | * Returns 0 on success, errno otherwise | |
323 | */ | |
247f0f3c | 324 | static int tipc_release(struct socket *sock) |
b97bf3fd | 325 | { |
b97bf3fd | 326 | struct sock *sk = sock->sk; |
58ed9442 JPM |
327 | struct tipc_sock *tsk; |
328 | struct tipc_port *port; | |
b97bf3fd | 329 | struct sk_buff *buf; |
8db1bae3 | 330 | u32 dnode; |
b97bf3fd | 331 | |
0c3141e9 AS |
332 | /* |
333 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
334 | * releases a pre-allocated child socket that was never used) | |
335 | */ | |
0c3141e9 | 336 | if (sk == NULL) |
b97bf3fd | 337 | return 0; |
c4307285 | 338 | |
58ed9442 JPM |
339 | tsk = tipc_sk(sk); |
340 | port = &tsk->port; | |
0c3141e9 AS |
341 | lock_sock(sk); |
342 | ||
343 | /* | |
344 | * Reject all unreceived messages, except on an active connection | |
345 | * (which disconnects locally & sends a 'FIN+' to peer) | |
346 | */ | |
5b8fa7ce | 347 | dnode = tipc_port_peernode(port); |
b97bf3fd | 348 | while (sock->state != SS_DISCONNECTING) { |
0c3141e9 AS |
349 | buf = __skb_dequeue(&sk->sk_receive_queue); |
350 | if (buf == NULL) | |
b97bf3fd | 351 | break; |
40682432 | 352 | if (TIPC_SKB_CB(buf)->handle != NULL) |
5f6d9123 | 353 | kfree_skb(buf); |
0c3141e9 AS |
354 | else { |
355 | if ((sock->state == SS_CONNECTING) || | |
356 | (sock->state == SS_CONNECTED)) { | |
357 | sock->state = SS_DISCONNECTING; | |
dadebc00 | 358 | port->connected = 0; |
5b8fa7ce | 359 | tipc_node_remove_conn(dnode, port->ref); |
0c3141e9 | 360 | } |
8db1bae3 | 361 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) |
9fbfb8b1 | 362 | tipc_link_xmit(buf, dnode, 0); |
0c3141e9 | 363 | } |
b97bf3fd PL |
364 | } |
365 | ||
5b8fa7ce JPM |
366 | tipc_withdraw(port, 0, NULL); |
367 | spin_lock_bh(port->lock); | |
368 | tipc_ref_discard(port->ref); | |
369 | spin_unlock_bh(port->lock); | |
370 | k_cancel_timer(&port->timer); | |
371 | if (port->connected) { | |
372 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, | |
373 | SHORT_H_SIZE, 0, dnode, tipc_own_addr, | |
374 | tipc_port_peerport(port), | |
375 | port->ref, TIPC_ERR_NO_PORT); | |
376 | if (buf) | |
377 | tipc_link_xmit(buf, dnode, port->ref); | |
378 | tipc_node_remove_conn(dnode, port->ref); | |
379 | } | |
5b8fa7ce | 380 | k_term_timer(&port->timer); |
b97bf3fd | 381 | |
0c3141e9 | 382 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 383 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 384 | |
0c3141e9 | 385 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
386 | sock->state = SS_DISCONNECTING; |
387 | release_sock(sk); | |
b97bf3fd | 388 | sock_put(sk); |
0c3141e9 | 389 | sock->sk = NULL; |
b97bf3fd | 390 | |
065d7e39 | 391 | return 0; |
b97bf3fd PL |
392 | } |
393 | ||
394 | /** | |
247f0f3c | 395 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
396 | * @sock: socket structure |
397 | * @uaddr: socket address describing name(s) and desired operation | |
398 | * @uaddr_len: size of socket address data structure | |
c4307285 | 399 | * |
b97bf3fd PL |
400 | * Name and name sequence binding is indicated using a positive scope value; |
401 | * a negative scope value unbinds the specified name. Specifying no name | |
402 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 403 | * |
b97bf3fd | 404 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
405 | * |
406 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
407 | * access any non-constant socket information. | |
b97bf3fd | 408 | */ |
247f0f3c YX |
409 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
410 | int uaddr_len) | |
b97bf3fd | 411 | { |
84602761 | 412 | struct sock *sk = sock->sk; |
b97bf3fd | 413 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 414 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 415 | int res = -EINVAL; |
b97bf3fd | 416 | |
84602761 YX |
417 | lock_sock(sk); |
418 | if (unlikely(!uaddr_len)) { | |
58ed9442 | 419 | res = tipc_withdraw(&tsk->port, 0, NULL); |
84602761 YX |
420 | goto exit; |
421 | } | |
c4307285 | 422 | |
84602761 YX |
423 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
424 | res = -EINVAL; | |
425 | goto exit; | |
426 | } | |
427 | if (addr->family != AF_TIPC) { | |
428 | res = -EAFNOSUPPORT; | |
429 | goto exit; | |
430 | } | |
b97bf3fd | 431 | |
b97bf3fd PL |
432 | if (addr->addrtype == TIPC_ADDR_NAME) |
433 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
434 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
435 | res = -EAFNOSUPPORT; | |
436 | goto exit; | |
437 | } | |
c4307285 | 438 | |
13a2e898 | 439 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 440 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
441 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
442 | res = -EACCES; | |
443 | goto exit; | |
444 | } | |
c422f1bd | 445 | |
84602761 | 446 | res = (addr->scope > 0) ? |
58ed9442 JPM |
447 | tipc_publish(&tsk->port, addr->scope, &addr->addr.nameseq) : |
448 | tipc_withdraw(&tsk->port, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
449 | exit: |
450 | release_sock(sk); | |
451 | return res; | |
b97bf3fd PL |
452 | } |
453 | ||
c4307285 | 454 | /** |
247f0f3c | 455 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
456 | * @sock: socket structure |
457 | * @uaddr: area for returned socket address | |
458 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 459 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 460 | * |
b97bf3fd | 461 | * Returns 0 on success, errno otherwise |
0c3141e9 | 462 | * |
2da59918 AS |
463 | * NOTE: This routine doesn't need to take the socket lock since it only |
464 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 465 | * a completely predictable manner). |
b97bf3fd | 466 | */ |
247f0f3c YX |
467 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
468 | int *uaddr_len, int peer) | |
b97bf3fd | 469 | { |
b97bf3fd | 470 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 471 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
b97bf3fd | 472 | |
88f8a5e3 | 473 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 474 | if (peer) { |
2da59918 AS |
475 | if ((sock->state != SS_CONNECTED) && |
476 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
477 | return -ENOTCONN; | |
58ed9442 JPM |
478 | addr->addr.id.ref = tipc_port_peerport(&tsk->port); |
479 | addr->addr.id.node = tipc_port_peernode(&tsk->port); | |
0c3141e9 | 480 | } else { |
58ed9442 | 481 | addr->addr.id.ref = tsk->port.ref; |
b924dcf0 | 482 | addr->addr.id.node = tipc_own_addr; |
0c3141e9 | 483 | } |
b97bf3fd PL |
484 | |
485 | *uaddr_len = sizeof(*addr); | |
486 | addr->addrtype = TIPC_ADDR_ID; | |
487 | addr->family = AF_TIPC; | |
488 | addr->scope = 0; | |
b97bf3fd PL |
489 | addr->addr.name.domain = 0; |
490 | ||
0c3141e9 | 491 | return 0; |
b97bf3fd PL |
492 | } |
493 | ||
494 | /** | |
247f0f3c | 495 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
496 | * @file: file structure associated with the socket |
497 | * @sock: socket for which to calculate the poll bits | |
498 | * @wait: ??? | |
499 | * | |
9b674e82 AS |
500 | * Returns pollmask value |
501 | * | |
502 | * COMMENTARY: | |
503 | * It appears that the usual socket locking mechanisms are not useful here | |
504 | * since the pollmask info is potentially out-of-date the moment this routine | |
505 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
506 | * to handle any preventable race conditions, so TIPC will do the same ... | |
507 | * | |
508 | * TIPC sets the returned events as follows: | |
f662c070 AS |
509 | * |
510 | * socket state flags set | |
511 | * ------------ --------- | |
512 | * unconnected no read flags | |
c4fc298a | 513 | * POLLOUT if port is not congested |
f662c070 AS |
514 | * |
515 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
516 | * no write flags | |
517 | * | |
518 | * connected POLLIN/POLLRDNORM if data in rx queue | |
519 | * POLLOUT if port is not congested | |
520 | * | |
521 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
522 | * no write flags | |
523 | * | |
524 | * listening POLLIN if SYN in rx queue | |
525 | * no write flags | |
526 | * | |
527 | * ready POLLIN/POLLRDNORM if data in rx queue | |
528 | * [connectionless] POLLOUT (since port cannot be congested) | |
529 | * | |
530 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
531 | * imply that the operation will succeed, merely that it should be performed | |
532 | * and will not block. | |
b97bf3fd | 533 | */ |
247f0f3c YX |
534 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
535 | poll_table *wait) | |
b97bf3fd | 536 | { |
9b674e82 | 537 | struct sock *sk = sock->sk; |
58ed9442 | 538 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 539 | u32 mask = 0; |
9b674e82 | 540 | |
f288bef4 | 541 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 542 | |
f662c070 | 543 | switch ((int)sock->state) { |
c4fc298a | 544 | case SS_UNCONNECTED: |
60120526 | 545 | if (!tsk->link_cong) |
c4fc298a EH |
546 | mask |= POLLOUT; |
547 | break; | |
f662c070 AS |
548 | case SS_READY: |
549 | case SS_CONNECTED: | |
60120526 | 550 | if (!tsk->link_cong && !tipc_sk_conn_cong(tsk)) |
f662c070 AS |
551 | mask |= POLLOUT; |
552 | /* fall thru' */ | |
553 | case SS_CONNECTING: | |
554 | case SS_LISTENING: | |
555 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
556 | mask |= (POLLIN | POLLRDNORM); | |
557 | break; | |
558 | case SS_DISCONNECTING: | |
559 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
560 | break; | |
561 | } | |
9b674e82 AS |
562 | |
563 | return mask; | |
b97bf3fd PL |
564 | } |
565 | ||
0abd8ff2 JPM |
566 | /** |
567 | * tipc_sendmcast - send multicast message | |
568 | * @sock: socket structure | |
569 | * @seq: destination address | |
570 | * @iov: message data to send | |
571 | * @dsz: total length of message data | |
572 | * @timeo: timeout to wait for wakeup | |
573 | * | |
574 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
575 | * Returns the number of bytes sent on success, or errno | |
576 | */ | |
577 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
578 | struct iovec *iov, size_t dsz, long timeo) | |
579 | { | |
580 | struct sock *sk = sock->sk; | |
581 | struct tipc_msg *mhdr = &tipc_sk(sk)->port.phdr; | |
582 | struct sk_buff *buf; | |
583 | uint mtu; | |
584 | int rc; | |
585 | ||
586 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
587 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
588 | msg_set_destport(mhdr, 0); | |
589 | msg_set_destnode(mhdr, 0); | |
590 | msg_set_nametype(mhdr, seq->type); | |
591 | msg_set_namelower(mhdr, seq->lower); | |
592 | msg_set_nameupper(mhdr, seq->upper); | |
593 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
594 | ||
595 | new_mtu: | |
596 | mtu = tipc_bclink_get_mtu(); | |
9fbfb8b1 | 597 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
0abd8ff2 JPM |
598 | if (unlikely(rc < 0)) |
599 | return rc; | |
600 | ||
601 | do { | |
602 | rc = tipc_bclink_xmit(buf); | |
603 | if (likely(rc >= 0)) { | |
604 | rc = dsz; | |
605 | break; | |
606 | } | |
607 | if (rc == -EMSGSIZE) | |
608 | goto new_mtu; | |
609 | if (rc != -ELINKCONG) | |
610 | break; | |
50100a5e | 611 | tipc_sk(sk)->link_cong = 1; |
0abd8ff2 JPM |
612 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
613 | if (rc) | |
614 | kfree_skb_list(buf); | |
615 | } while (!rc); | |
616 | return rc; | |
617 | } | |
618 | ||
078bec82 JPM |
619 | /* tipc_sk_mcast_rcv - Deliver multicast message to all destination sockets |
620 | */ | |
621 | void tipc_sk_mcast_rcv(struct sk_buff *buf) | |
622 | { | |
623 | struct tipc_msg *msg = buf_msg(buf); | |
624 | struct tipc_port_list dports = {0, NULL, }; | |
625 | struct tipc_port_list *item; | |
626 | struct sk_buff *b; | |
627 | uint i, last, dst = 0; | |
628 | u32 scope = TIPC_CLUSTER_SCOPE; | |
629 | ||
630 | if (in_own_node(msg_orignode(msg))) | |
631 | scope = TIPC_NODE_SCOPE; | |
632 | ||
633 | /* Create destination port list: */ | |
634 | tipc_nametbl_mc_translate(msg_nametype(msg), | |
635 | msg_namelower(msg), | |
636 | msg_nameupper(msg), | |
637 | scope, | |
638 | &dports); | |
639 | last = dports.count; | |
640 | if (!last) { | |
641 | kfree_skb(buf); | |
642 | return; | |
643 | } | |
644 | ||
645 | for (item = &dports; item; item = item->next) { | |
646 | for (i = 0; i < PLSIZE && ++dst <= last; i++) { | |
647 | b = (dst != last) ? skb_clone(buf, GFP_ATOMIC) : buf; | |
648 | if (!b) { | |
649 | pr_warn("Failed do clone mcast rcv buffer\n"); | |
650 | continue; | |
651 | } | |
652 | msg_set_destport(msg, item->ports[i]); | |
653 | tipc_sk_rcv(b); | |
654 | } | |
655 | } | |
656 | tipc_port_list_free(&dports); | |
657 | } | |
658 | ||
ac0074ee JPM |
659 | /** |
660 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
661 | * @tsk: receiving socket | |
662 | * @dnode: node to send response message to, if any | |
663 | * @buf: buffer containing protocol message | |
664 | * Returns 0 (TIPC_OK) if message was consumed, 1 (TIPC_FWD_MSG) if | |
665 | * (CONN_PROBE_REPLY) message should be forwarded. | |
666 | */ | |
52f50ce5 WY |
667 | static int tipc_sk_proto_rcv(struct tipc_sock *tsk, u32 *dnode, |
668 | struct sk_buff *buf) | |
ac0074ee JPM |
669 | { |
670 | struct tipc_msg *msg = buf_msg(buf); | |
671 | struct tipc_port *port = &tsk->port; | |
60120526 | 672 | int conn_cong; |
ac0074ee JPM |
673 | |
674 | /* Ignore if connection cannot be validated: */ | |
675 | if (!port->connected || !tipc_port_peer_msg(port, msg)) | |
676 | goto exit; | |
677 | ||
678 | port->probing_state = TIPC_CONN_OK; | |
679 | ||
680 | if (msg_type(msg) == CONN_ACK) { | |
60120526 JPM |
681 | conn_cong = tipc_sk_conn_cong(tsk); |
682 | tsk->sent_unacked -= msg_msgcnt(msg); | |
683 | if (conn_cong) | |
50100a5e | 684 | tsk->sk.sk_write_space(&tsk->sk); |
ac0074ee JPM |
685 | } else if (msg_type(msg) == CONN_PROBE) { |
686 | if (!tipc_msg_reverse(buf, dnode, TIPC_OK)) | |
687 | return TIPC_OK; | |
688 | msg_set_type(msg, CONN_PROBE_REPLY); | |
689 | return TIPC_FWD_MSG; | |
690 | } | |
691 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ | |
692 | exit: | |
693 | kfree_skb(buf); | |
694 | return TIPC_OK; | |
695 | } | |
696 | ||
c4307285 | 697 | /** |
b97bf3fd PL |
698 | * dest_name_check - verify user is permitted to send to specified port name |
699 | * @dest: destination address | |
700 | * @m: descriptor for message to be sent | |
c4307285 | 701 | * |
b97bf3fd PL |
702 | * Prevents restricted configuration commands from being issued by |
703 | * unauthorized users. | |
c4307285 | 704 | * |
b97bf3fd PL |
705 | * Returns 0 if permission is granted, otherwise errno |
706 | */ | |
05790c64 | 707 | static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m) |
b97bf3fd PL |
708 | { |
709 | struct tipc_cfg_msg_hdr hdr; | |
710 | ||
e2dafe87 JPM |
711 | if (unlikely(dest->addrtype == TIPC_ADDR_ID)) |
712 | return 0; | |
c4307285 YH |
713 | if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES)) |
714 | return 0; | |
715 | if (likely(dest->addr.name.name.type == TIPC_TOP_SRV)) | |
716 | return 0; | |
c4307285 YH |
717 | if (likely(dest->addr.name.name.type != TIPC_CFG_SRV)) |
718 | return -EACCES; | |
b97bf3fd | 719 | |
3f8dd944 AS |
720 | if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr))) |
721 | return -EMSGSIZE; | |
c4307285 | 722 | if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr))) |
b97bf3fd | 723 | return -EFAULT; |
70cb2347 | 724 | if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN))) |
b97bf3fd | 725 | return -EACCES; |
c4307285 | 726 | |
b97bf3fd PL |
727 | return 0; |
728 | } | |
729 | ||
3f40504f YX |
730 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
731 | { | |
732 | struct sock *sk = sock->sk; | |
58ed9442 | 733 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
734 | DEFINE_WAIT(wait); |
735 | int done; | |
736 | ||
737 | do { | |
738 | int err = sock_error(sk); | |
739 | if (err) | |
740 | return err; | |
741 | if (sock->state == SS_DISCONNECTING) | |
742 | return -EPIPE; | |
743 | if (!*timeo_p) | |
744 | return -EAGAIN; | |
745 | if (signal_pending(current)) | |
746 | return sock_intr_errno(*timeo_p); | |
747 | ||
748 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 749 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
750 | finish_wait(sk_sleep(sk), &wait); |
751 | } while (!done); | |
752 | return 0; | |
753 | } | |
754 | ||
b97bf3fd | 755 | /** |
247f0f3c | 756 | * tipc_sendmsg - send message in connectionless manner |
0c3141e9 | 757 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
758 | * @sock: socket structure |
759 | * @m: message to send | |
e2dafe87 | 760 | * @dsz: amount of user data to be sent |
c4307285 | 761 | * |
b97bf3fd | 762 | * Message must have an destination specified explicitly. |
c4307285 | 763 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
764 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
765 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 766 | * |
b97bf3fd PL |
767 | * Returns the number of bytes sent on success, or errno otherwise |
768 | */ | |
247f0f3c | 769 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
e2dafe87 | 770 | struct msghdr *m, size_t dsz) |
b97bf3fd | 771 | { |
e2dafe87 | 772 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 773 | struct sock *sk = sock->sk; |
58ed9442 | 774 | struct tipc_sock *tsk = tipc_sk(sk); |
5c311421 | 775 | struct tipc_port *port = &tsk->port; |
e2dafe87 JPM |
776 | struct tipc_msg *mhdr = &port->phdr; |
777 | struct iovec *iov = m->msg_iov; | |
778 | u32 dnode, dport; | |
779 | struct sk_buff *buf; | |
780 | struct tipc_name_seq *seq = &dest->addr.nameseq; | |
781 | u32 mtu; | |
3f40504f | 782 | long timeo; |
e2dafe87 | 783 | int rc = -EINVAL; |
b97bf3fd PL |
784 | |
785 | if (unlikely(!dest)) | |
786 | return -EDESTADDRREQ; | |
e2dafe87 | 787 | |
51f9cc1f AS |
788 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
789 | (dest->family != AF_TIPC))) | |
b97bf3fd | 790 | return -EINVAL; |
e2dafe87 JPM |
791 | |
792 | if (dsz > TIPC_MAX_USER_MSG_SIZE) | |
c29c3f70 | 793 | return -EMSGSIZE; |
b97bf3fd | 794 | |
0c3141e9 AS |
795 | if (iocb) |
796 | lock_sock(sk); | |
797 | ||
e2dafe87 | 798 | if (unlikely(sock->state != SS_READY)) { |
0c3141e9 | 799 | if (sock->state == SS_LISTENING) { |
e2dafe87 | 800 | rc = -EPIPE; |
0c3141e9 AS |
801 | goto exit; |
802 | } | |
803 | if (sock->state != SS_UNCONNECTED) { | |
e2dafe87 | 804 | rc = -EISCONN; |
0c3141e9 AS |
805 | goto exit; |
806 | } | |
58ed9442 | 807 | if (tsk->port.published) { |
e2dafe87 | 808 | rc = -EOPNOTSUPP; |
0c3141e9 AS |
809 | goto exit; |
810 | } | |
3388007b | 811 | if (dest->addrtype == TIPC_ADDR_NAME) { |
58ed9442 JPM |
812 | tsk->port.conn_type = dest->addr.name.name.type; |
813 | tsk->port.conn_instance = dest->addr.name.name.instance; | |
3388007b | 814 | } |
b97bf3fd | 815 | } |
e2dafe87 JPM |
816 | rc = dest_name_check(dest, m); |
817 | if (rc) | |
818 | goto exit; | |
b97bf3fd | 819 | |
3f40504f | 820 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
821 | |
822 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
823 | rc = tipc_sendmcast(sock, seq, iov, dsz, timeo); | |
824 | goto exit; | |
825 | } else if (dest->addrtype == TIPC_ADDR_NAME) { | |
826 | u32 type = dest->addr.name.name.type; | |
827 | u32 inst = dest->addr.name.name.instance; | |
828 | u32 domain = dest->addr.name.domain; | |
829 | ||
830 | dnode = domain; | |
831 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
832 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
833 | msg_set_nametype(mhdr, type); | |
834 | msg_set_nameinst(mhdr, inst); | |
835 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
836 | dport = tipc_nametbl_translate(type, inst, &dnode); | |
837 | msg_set_destnode(mhdr, dnode); | |
838 | msg_set_destport(mhdr, dport); | |
839 | if (unlikely(!dport && !dnode)) { | |
840 | rc = -EHOSTUNREACH; | |
841 | goto exit; | |
c4307285 | 842 | } |
e2dafe87 JPM |
843 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
844 | dnode = dest->addr.id.node; | |
845 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
846 | msg_set_lookup_scope(mhdr, 0); | |
847 | msg_set_destnode(mhdr, dnode); | |
848 | msg_set_destport(mhdr, dest->addr.id.ref); | |
849 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
850 | } | |
851 | ||
852 | new_mtu: | |
853 | mtu = tipc_node_get_mtu(dnode, tsk->port.ref); | |
9fbfb8b1 | 854 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
e2dafe87 JPM |
855 | if (rc < 0) |
856 | goto exit; | |
857 | ||
858 | do { | |
50100a5e | 859 | TIPC_SKB_CB(buf)->wakeup_pending = tsk->link_cong; |
9fbfb8b1 | 860 | rc = tipc_link_xmit(buf, dnode, tsk->port.ref); |
e2dafe87 JPM |
861 | if (likely(rc >= 0)) { |
862 | if (sock->state != SS_READY) | |
0c3141e9 | 863 | sock->state = SS_CONNECTING; |
e2dafe87 | 864 | rc = dsz; |
0c3141e9 | 865 | break; |
c4307285 | 866 | } |
e2dafe87 JPM |
867 | if (rc == -EMSGSIZE) |
868 | goto new_mtu; | |
e2dafe87 | 869 | if (rc != -ELINKCONG) |
0c3141e9 | 870 | break; |
50100a5e | 871 | tsk->link_cong = 1; |
e2dafe87 | 872 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
70452dcb EH |
873 | if (rc) |
874 | kfree_skb_list(buf); | |
e2dafe87 | 875 | } while (!rc); |
0c3141e9 AS |
876 | exit: |
877 | if (iocb) | |
878 | release_sock(sk); | |
e2dafe87 JPM |
879 | |
880 | return rc; | |
b97bf3fd PL |
881 | } |
882 | ||
391a6dd1 YX |
883 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
884 | { | |
885 | struct sock *sk = sock->sk; | |
58ed9442 | 886 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
887 | DEFINE_WAIT(wait); |
888 | int done; | |
889 | ||
890 | do { | |
891 | int err = sock_error(sk); | |
892 | if (err) | |
893 | return err; | |
894 | if (sock->state == SS_DISCONNECTING) | |
895 | return -EPIPE; | |
896 | else if (sock->state != SS_CONNECTED) | |
897 | return -ENOTCONN; | |
898 | if (!*timeo_p) | |
899 | return -EAGAIN; | |
900 | if (signal_pending(current)) | |
901 | return sock_intr_errno(*timeo_p); | |
902 | ||
903 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
904 | done = sk_wait_event(sk, timeo_p, | |
60120526 JPM |
905 | (!tsk->link_cong && |
906 | !tipc_sk_conn_cong(tsk)) || | |
907 | !tsk->port.connected); | |
391a6dd1 YX |
908 | finish_wait(sk_sleep(sk), &wait); |
909 | } while (!done); | |
910 | return 0; | |
911 | } | |
912 | ||
c4307285 | 913 | /** |
4ccfe5e0 JPM |
914 | * tipc_send_stream - send stream-oriented data |
915 | * @iocb: (unused) | |
b97bf3fd | 916 | * @sock: socket structure |
4ccfe5e0 JPM |
917 | * @m: data to send |
918 | * @dsz: total length of data to be transmitted | |
c4307285 | 919 | * |
4ccfe5e0 | 920 | * Used for SOCK_STREAM data. |
c4307285 | 921 | * |
4ccfe5e0 JPM |
922 | * Returns the number of bytes sent on success (or partial success), |
923 | * or errno if no data sent | |
b97bf3fd | 924 | */ |
4ccfe5e0 JPM |
925 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
926 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 927 | { |
0c3141e9 | 928 | struct sock *sk = sock->sk; |
58ed9442 | 929 | struct tipc_sock *tsk = tipc_sk(sk); |
4ccfe5e0 JPM |
930 | struct tipc_port *port = &tsk->port; |
931 | struct tipc_msg *mhdr = &port->phdr; | |
932 | struct sk_buff *buf; | |
342dfc30 | 933 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
4ccfe5e0 JPM |
934 | u32 ref = port->ref; |
935 | int rc = -EINVAL; | |
391a6dd1 | 936 | long timeo; |
4ccfe5e0 JPM |
937 | u32 dnode; |
938 | uint mtu, send, sent = 0; | |
b97bf3fd PL |
939 | |
940 | /* Handle implied connection establishment */ | |
4ccfe5e0 JPM |
941 | if (unlikely(dest)) { |
942 | rc = tipc_sendmsg(iocb, sock, m, dsz); | |
943 | if (dsz && (dsz == rc)) | |
60120526 | 944 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
945 | return rc; |
946 | } | |
947 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
948 | return -EMSGSIZE; |
949 | ||
0c3141e9 AS |
950 | if (iocb) |
951 | lock_sock(sk); | |
b97bf3fd | 952 | |
391a6dd1 YX |
953 | if (unlikely(sock->state != SS_CONNECTED)) { |
954 | if (sock->state == SS_DISCONNECTING) | |
4ccfe5e0 | 955 | rc = -EPIPE; |
391a6dd1 | 956 | else |
4ccfe5e0 | 957 | rc = -ENOTCONN; |
391a6dd1 YX |
958 | goto exit; |
959 | } | |
1d835874 | 960 | |
391a6dd1 | 961 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
4ccfe5e0 | 962 | dnode = tipc_port_peernode(port); |
4ccfe5e0 JPM |
963 | |
964 | next: | |
965 | mtu = port->max_pkt; | |
966 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); | |
9fbfb8b1 | 967 | rc = tipc_msg_build(mhdr, m->msg_iov, sent, send, mtu, &buf); |
4ccfe5e0 JPM |
968 | if (unlikely(rc < 0)) |
969 | goto exit; | |
c4307285 | 970 | do { |
60120526 | 971 | if (likely(!tipc_sk_conn_cong(tsk))) { |
9fbfb8b1 | 972 | rc = tipc_link_xmit(buf, dnode, ref); |
4ccfe5e0 | 973 | if (likely(!rc)) { |
60120526 | 974 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
975 | sent += send; |
976 | if (sent == dsz) | |
977 | break; | |
978 | goto next; | |
979 | } | |
980 | if (rc == -EMSGSIZE) { | |
981 | port->max_pkt = tipc_node_get_mtu(dnode, ref); | |
982 | goto next; | |
983 | } | |
984 | if (rc != -ELINKCONG) | |
985 | break; | |
50100a5e | 986 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
987 | } |
988 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
70452dcb EH |
989 | if (rc) |
990 | kfree_skb_list(buf); | |
4ccfe5e0 | 991 | } while (!rc); |
391a6dd1 | 992 | exit: |
0c3141e9 AS |
993 | if (iocb) |
994 | release_sock(sk); | |
4ccfe5e0 | 995 | return sent ? sent : rc; |
b97bf3fd PL |
996 | } |
997 | ||
c4307285 | 998 | /** |
4ccfe5e0 JPM |
999 | * tipc_send_packet - send a connection-oriented message |
1000 | * @iocb: if NULL, indicates that socket lock is already held | |
b97bf3fd | 1001 | * @sock: socket structure |
4ccfe5e0 JPM |
1002 | * @m: message to send |
1003 | * @dsz: length of data to be transmitted | |
c4307285 | 1004 | * |
4ccfe5e0 | 1005 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1006 | * |
4ccfe5e0 | 1007 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1008 | */ |
4ccfe5e0 JPM |
1009 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
1010 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 1011 | { |
4ccfe5e0 JPM |
1012 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1013 | return -EMSGSIZE; | |
b97bf3fd | 1014 | |
4ccfe5e0 | 1015 | return tipc_send_stream(iocb, sock, m, dsz); |
b97bf3fd PL |
1016 | } |
1017 | ||
dadebc00 | 1018 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1019 | */ |
dadebc00 JPM |
1020 | static void tipc_sk_finish_conn(struct tipc_port *port, u32 peer_port, |
1021 | u32 peer_node) | |
b97bf3fd | 1022 | { |
dadebc00 | 1023 | struct tipc_msg *msg = &port->phdr; |
b97bf3fd | 1024 | |
dadebc00 JPM |
1025 | msg_set_destnode(msg, peer_node); |
1026 | msg_set_destport(msg, peer_port); | |
1027 | msg_set_type(msg, TIPC_CONN_MSG); | |
1028 | msg_set_lookup_scope(msg, 0); | |
1029 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1030 | |
dadebc00 JPM |
1031 | port->probing_interval = CONN_PROBING_INTERVAL; |
1032 | port->probing_state = TIPC_CONN_OK; | |
1033 | port->connected = 1; | |
1034 | k_start_timer(&port->timer, port->probing_interval); | |
1035 | tipc_node_add_conn(peer_node, port->ref, peer_port); | |
1036 | port->max_pkt = tipc_node_get_mtu(peer_node, port->ref); | |
b97bf3fd PL |
1037 | } |
1038 | ||
1039 | /** | |
1040 | * set_orig_addr - capture sender's address for received message | |
1041 | * @m: descriptor for message info | |
1042 | * @msg: received message header | |
c4307285 | 1043 | * |
b97bf3fd PL |
1044 | * Note: Address is not captured if not requested by receiver. |
1045 | */ | |
05790c64 | 1046 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1047 | { |
342dfc30 | 1048 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1049 | |
c4307285 | 1050 | if (addr) { |
b97bf3fd PL |
1051 | addr->family = AF_TIPC; |
1052 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1053 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1054 | addr->addr.id.ref = msg_origport(msg); |
1055 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1056 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1057 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1058 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1059 | } | |
1060 | } | |
1061 | ||
1062 | /** | |
c4307285 | 1063 | * anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1064 | * @m: descriptor for message info |
1065 | * @msg: received message header | |
1066 | * @tport: TIPC port associated with message | |
c4307285 | 1067 | * |
b97bf3fd | 1068 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1069 | * |
b97bf3fd PL |
1070 | * Returns 0 if successful, otherwise errno |
1071 | */ | |
05790c64 | 1072 | static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
ae8509c4 | 1073 | struct tipc_port *tport) |
b97bf3fd PL |
1074 | { |
1075 | u32 anc_data[3]; | |
1076 | u32 err; | |
1077 | u32 dest_type; | |
3546c750 | 1078 | int has_name; |
b97bf3fd PL |
1079 | int res; |
1080 | ||
1081 | if (likely(m->msg_controllen == 0)) | |
1082 | return 0; | |
1083 | ||
1084 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1085 | err = msg ? msg_errcode(msg) : 0; |
1086 | if (unlikely(err)) { | |
1087 | anc_data[0] = err; | |
1088 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1089 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1090 | if (res) | |
b97bf3fd | 1091 | return res; |
2db9983a AS |
1092 | if (anc_data[1]) { |
1093 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1094 | msg_data(msg)); | |
1095 | if (res) | |
1096 | return res; | |
1097 | } | |
b97bf3fd PL |
1098 | } |
1099 | ||
1100 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1101 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1102 | switch (dest_type) { | |
1103 | case TIPC_NAMED_MSG: | |
3546c750 | 1104 | has_name = 1; |
b97bf3fd PL |
1105 | anc_data[0] = msg_nametype(msg); |
1106 | anc_data[1] = msg_namelower(msg); | |
1107 | anc_data[2] = msg_namelower(msg); | |
1108 | break; | |
1109 | case TIPC_MCAST_MSG: | |
3546c750 | 1110 | has_name = 1; |
b97bf3fd PL |
1111 | anc_data[0] = msg_nametype(msg); |
1112 | anc_data[1] = msg_namelower(msg); | |
1113 | anc_data[2] = msg_nameupper(msg); | |
1114 | break; | |
1115 | case TIPC_CONN_MSG: | |
3546c750 | 1116 | has_name = (tport->conn_type != 0); |
b97bf3fd PL |
1117 | anc_data[0] = tport->conn_type; |
1118 | anc_data[1] = tport->conn_instance; | |
1119 | anc_data[2] = tport->conn_instance; | |
1120 | break; | |
1121 | default: | |
3546c750 | 1122 | has_name = 0; |
b97bf3fd | 1123 | } |
2db9983a AS |
1124 | if (has_name) { |
1125 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1126 | if (res) | |
1127 | return res; | |
1128 | } | |
b97bf3fd PL |
1129 | |
1130 | return 0; | |
1131 | } | |
1132 | ||
739f5e4e JPM |
1133 | static void tipc_sk_send_ack(struct tipc_port *port, uint ack) |
1134 | { | |
1135 | struct sk_buff *buf = NULL; | |
1136 | struct tipc_msg *msg; | |
1137 | u32 peer_port = tipc_port_peerport(port); | |
1138 | u32 dnode = tipc_port_peernode(port); | |
1139 | ||
1140 | if (!port->connected) | |
1141 | return; | |
1142 | buf = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode, | |
1143 | tipc_own_addr, peer_port, port->ref, TIPC_OK); | |
1144 | if (!buf) | |
1145 | return; | |
1146 | msg = buf_msg(buf); | |
1147 | msg_set_msgcnt(msg, ack); | |
1148 | tipc_link_xmit(buf, dnode, msg_link_selector(msg)); | |
1149 | } | |
1150 | ||
85d3fc94 | 1151 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1152 | { |
1153 | struct sock *sk = sock->sk; | |
1154 | DEFINE_WAIT(wait); | |
85d3fc94 | 1155 | long timeo = *timeop; |
9bbb4ecc YX |
1156 | int err; |
1157 | ||
1158 | for (;;) { | |
1159 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1160 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1161 | if (sock->state == SS_DISCONNECTING) { |
1162 | err = -ENOTCONN; | |
1163 | break; | |
1164 | } | |
1165 | release_sock(sk); | |
1166 | timeo = schedule_timeout(timeo); | |
1167 | lock_sock(sk); | |
1168 | } | |
1169 | err = 0; | |
1170 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1171 | break; | |
1172 | err = sock_intr_errno(timeo); | |
1173 | if (signal_pending(current)) | |
1174 | break; | |
1175 | err = -EAGAIN; | |
1176 | if (!timeo) | |
1177 | break; | |
1178 | } | |
1179 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1180 | *timeop = timeo; |
9bbb4ecc YX |
1181 | return err; |
1182 | } | |
1183 | ||
c4307285 | 1184 | /** |
247f0f3c | 1185 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1186 | * @iocb: (unused) |
1187 | * @m: descriptor for message info | |
1188 | * @buf_len: total size of user buffer area | |
1189 | * @flags: receive flags | |
c4307285 | 1190 | * |
b97bf3fd PL |
1191 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1192 | * If the complete message doesn't fit in user area, truncate it. | |
1193 | * | |
1194 | * Returns size of returned message data, errno otherwise | |
1195 | */ | |
247f0f3c YX |
1196 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
1197 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1198 | { |
0c3141e9 | 1199 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1200 | struct tipc_sock *tsk = tipc_sk(sk); |
1201 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
1202 | struct sk_buff *buf; |
1203 | struct tipc_msg *msg; | |
9bbb4ecc | 1204 | long timeo; |
b97bf3fd PL |
1205 | unsigned int sz; |
1206 | u32 err; | |
1207 | int res; | |
1208 | ||
0c3141e9 | 1209 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1210 | if (unlikely(!buf_len)) |
1211 | return -EINVAL; | |
1212 | ||
0c3141e9 | 1213 | lock_sock(sk); |
b97bf3fd | 1214 | |
0c3141e9 AS |
1215 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1216 | res = -ENOTCONN; | |
b97bf3fd PL |
1217 | goto exit; |
1218 | } | |
1219 | ||
9bbb4ecc | 1220 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1221 | restart: |
b97bf3fd | 1222 | |
0c3141e9 | 1223 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1224 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1225 | if (res) |
1226 | goto exit; | |
b97bf3fd | 1227 | |
0c3141e9 | 1228 | /* Look at first message in receive queue */ |
0c3141e9 | 1229 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1230 | msg = buf_msg(buf); |
1231 | sz = msg_data_sz(msg); | |
1232 | err = msg_errcode(msg); | |
1233 | ||
b97bf3fd | 1234 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1235 | if ((!sz) && (!err)) { |
0c3141e9 | 1236 | advance_rx_queue(sk); |
b97bf3fd PL |
1237 | goto restart; |
1238 | } | |
1239 | ||
1240 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1241 | set_orig_addr(m, msg); |
1242 | ||
1243 | /* Capture ancillary data (optional) */ | |
58ed9442 | 1244 | res = anc_data_recv(m, msg, port); |
0c3141e9 | 1245 | if (res) |
b97bf3fd PL |
1246 | goto exit; |
1247 | ||
1248 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1249 | if (!err) { |
1250 | if (unlikely(buf_len < sz)) { | |
1251 | sz = buf_len; | |
1252 | m->msg_flags |= MSG_TRUNC; | |
1253 | } | |
0232fd0a AS |
1254 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg), |
1255 | m->msg_iov, sz); | |
1256 | if (res) | |
b97bf3fd | 1257 | goto exit; |
b97bf3fd PL |
1258 | res = sz; |
1259 | } else { | |
1260 | if ((sock->state == SS_READY) || | |
1261 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1262 | res = 0; | |
1263 | else | |
1264 | res = -ECONNRESET; | |
1265 | } | |
1266 | ||
1267 | /* Consume received message (optional) */ | |
b97bf3fd | 1268 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1269 | if ((sock->state != SS_READY) && |
60120526 | 1270 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
739f5e4e | 1271 | tipc_sk_send_ack(port, tsk->rcv_unacked); |
60120526 JPM |
1272 | tsk->rcv_unacked = 0; |
1273 | } | |
0c3141e9 | 1274 | advance_rx_queue(sk); |
c4307285 | 1275 | } |
b97bf3fd | 1276 | exit: |
0c3141e9 | 1277 | release_sock(sk); |
b97bf3fd PL |
1278 | return res; |
1279 | } | |
1280 | ||
c4307285 | 1281 | /** |
247f0f3c | 1282 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1283 | * @iocb: (unused) |
1284 | * @m: descriptor for message info | |
1285 | * @buf_len: total size of user buffer area | |
1286 | * @flags: receive flags | |
c4307285 YH |
1287 | * |
1288 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1289 | * will optionally wait for more; never truncates data. |
1290 | * | |
1291 | * Returns size of returned message data, errno otherwise | |
1292 | */ | |
247f0f3c YX |
1293 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
1294 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1295 | { |
0c3141e9 | 1296 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1297 | struct tipc_sock *tsk = tipc_sk(sk); |
1298 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
1299 | struct sk_buff *buf; |
1300 | struct tipc_msg *msg; | |
9bbb4ecc | 1301 | long timeo; |
b97bf3fd | 1302 | unsigned int sz; |
3720d40b | 1303 | int sz_to_copy, target, needed; |
b97bf3fd | 1304 | int sz_copied = 0; |
b97bf3fd | 1305 | u32 err; |
0c3141e9 | 1306 | int res = 0; |
b97bf3fd | 1307 | |
0c3141e9 | 1308 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1309 | if (unlikely(!buf_len)) |
1310 | return -EINVAL; | |
1311 | ||
0c3141e9 | 1312 | lock_sock(sk); |
b97bf3fd | 1313 | |
9bbb4ecc | 1314 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1315 | res = -ENOTCONN; |
b97bf3fd PL |
1316 | goto exit; |
1317 | } | |
1318 | ||
3720d40b | 1319 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1320 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1321 | |
617d3c7a | 1322 | restart: |
0c3141e9 | 1323 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1324 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1325 | if (res) |
1326 | goto exit; | |
b97bf3fd | 1327 | |
0c3141e9 | 1328 | /* Look at first message in receive queue */ |
0c3141e9 | 1329 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1330 | msg = buf_msg(buf); |
1331 | sz = msg_data_sz(msg); | |
1332 | err = msg_errcode(msg); | |
1333 | ||
1334 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1335 | if ((!sz) && (!err)) { |
0c3141e9 | 1336 | advance_rx_queue(sk); |
b97bf3fd PL |
1337 | goto restart; |
1338 | } | |
1339 | ||
1340 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1341 | if (sz_copied == 0) { |
1342 | set_orig_addr(m, msg); | |
58ed9442 | 1343 | res = anc_data_recv(m, msg, port); |
0c3141e9 | 1344 | if (res) |
b97bf3fd PL |
1345 | goto exit; |
1346 | } | |
1347 | ||
1348 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1349 | if (!err) { |
0232fd0a | 1350 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1351 | |
0232fd0a | 1352 | sz -= offset; |
b97bf3fd PL |
1353 | needed = (buf_len - sz_copied); |
1354 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a AS |
1355 | |
1356 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset, | |
1357 | m->msg_iov, sz_to_copy); | |
1358 | if (res) | |
b97bf3fd | 1359 | goto exit; |
0232fd0a | 1360 | |
b97bf3fd PL |
1361 | sz_copied += sz_to_copy; |
1362 | ||
1363 | if (sz_to_copy < sz) { | |
1364 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1365 | TIPC_SKB_CB(buf)->handle = |
1366 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1367 | goto exit; |
1368 | } | |
b97bf3fd PL |
1369 | } else { |
1370 | if (sz_copied != 0) | |
1371 | goto exit; /* can't add error msg to valid data */ | |
1372 | ||
1373 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1374 | res = 0; | |
1375 | else | |
1376 | res = -ECONNRESET; | |
1377 | } | |
1378 | ||
1379 | /* Consume received message (optional) */ | |
b97bf3fd | 1380 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1381 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
739f5e4e | 1382 | tipc_sk_send_ack(port, tsk->rcv_unacked); |
60120526 JPM |
1383 | tsk->rcv_unacked = 0; |
1384 | } | |
0c3141e9 | 1385 | advance_rx_queue(sk); |
c4307285 | 1386 | } |
b97bf3fd PL |
1387 | |
1388 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1389 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1390 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1391 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1392 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1393 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1394 | goto restart; |
1395 | ||
1396 | exit: | |
0c3141e9 | 1397 | release_sock(sk); |
a3b0a5a9 | 1398 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1399 | } |
1400 | ||
f288bef4 YX |
1401 | /** |
1402 | * tipc_write_space - wake up thread if port congestion is released | |
1403 | * @sk: socket | |
1404 | */ | |
1405 | static void tipc_write_space(struct sock *sk) | |
1406 | { | |
1407 | struct socket_wq *wq; | |
1408 | ||
1409 | rcu_read_lock(); | |
1410 | wq = rcu_dereference(sk->sk_wq); | |
1411 | if (wq_has_sleeper(wq)) | |
1412 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1413 | POLLWRNORM | POLLWRBAND); | |
1414 | rcu_read_unlock(); | |
1415 | } | |
1416 | ||
1417 | /** | |
1418 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1419 | * @sk: socket | |
1420 | * @len: the length of messages | |
1421 | */ | |
676d2369 | 1422 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1423 | { |
1424 | struct socket_wq *wq; | |
1425 | ||
1426 | rcu_read_lock(); | |
1427 | wq = rcu_dereference(sk->sk_wq); | |
1428 | if (wq_has_sleeper(wq)) | |
1429 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1430 | POLLRDNORM | POLLRDBAND); | |
1431 | rcu_read_unlock(); | |
1432 | } | |
1433 | ||
7e6c131e YX |
1434 | /** |
1435 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1436 | * @tsk: TIPC socket |
7e6c131e YX |
1437 | * @msg: message |
1438 | * | |
e4de5fab | 1439 | * Returns 0 (TIPC_OK) if everyting ok, -TIPC_ERR_NO_PORT otherwise |
7e6c131e | 1440 | */ |
e4de5fab | 1441 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **buf) |
7e6c131e | 1442 | { |
58ed9442 JPM |
1443 | struct sock *sk = &tsk->sk; |
1444 | struct tipc_port *port = &tsk->port; | |
8826cde6 | 1445 | struct socket *sock = sk->sk_socket; |
7e6c131e | 1446 | struct tipc_msg *msg = buf_msg(*buf); |
8826cde6 | 1447 | |
e4de5fab | 1448 | int retval = -TIPC_ERR_NO_PORT; |
7e6c131e YX |
1449 | |
1450 | if (msg_mcast(msg)) | |
1451 | return retval; | |
1452 | ||
1453 | switch ((int)sock->state) { | |
1454 | case SS_CONNECTED: | |
1455 | /* Accept only connection-based messages sent by peer */ | |
8826cde6 | 1456 | if (msg_connected(msg) && tipc_port_peer_msg(port, msg)) { |
7e6c131e YX |
1457 | if (unlikely(msg_errcode(msg))) { |
1458 | sock->state = SS_DISCONNECTING; | |
dadebc00 JPM |
1459 | port->connected = 0; |
1460 | /* let timer expire on it's own */ | |
1461 | tipc_node_remove_conn(tipc_port_peernode(port), | |
1462 | port->ref); | |
7e6c131e YX |
1463 | } |
1464 | retval = TIPC_OK; | |
1465 | } | |
1466 | break; | |
1467 | case SS_CONNECTING: | |
1468 | /* Accept only ACK or NACK message */ | |
dadebc00 JPM |
1469 | |
1470 | if (unlikely(!msg_connected(msg))) | |
1471 | break; | |
1472 | ||
584d24b3 YX |
1473 | if (unlikely(msg_errcode(msg))) { |
1474 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1475 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1476 | retval = TIPC_OK; |
1477 | break; | |
1478 | } | |
1479 | ||
dadebc00 | 1480 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
584d24b3 | 1481 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1482 | sk->sk_err = EINVAL; |
7e6c131e | 1483 | retval = TIPC_OK; |
584d24b3 YX |
1484 | break; |
1485 | } | |
1486 | ||
dadebc00 JPM |
1487 | tipc_sk_finish_conn(port, msg_origport(msg), msg_orignode(msg)); |
1488 | msg_set_importance(&port->phdr, msg_importance(msg)); | |
1489 | sock->state = SS_CONNECTED; | |
1490 | ||
584d24b3 YX |
1491 | /* If an incoming message is an 'ACK-', it should be |
1492 | * discarded here because it doesn't contain useful | |
1493 | * data. In addition, we should try to wake up | |
1494 | * connect() routine if sleeping. | |
1495 | */ | |
1496 | if (msg_data_sz(msg) == 0) { | |
1497 | kfree_skb(*buf); | |
1498 | *buf = NULL; | |
1499 | if (waitqueue_active(sk_sleep(sk))) | |
1500 | wake_up_interruptible(sk_sleep(sk)); | |
1501 | } | |
1502 | retval = TIPC_OK; | |
7e6c131e YX |
1503 | break; |
1504 | case SS_LISTENING: | |
1505 | case SS_UNCONNECTED: | |
1506 | /* Accept only SYN message */ | |
1507 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1508 | retval = TIPC_OK; | |
1509 | break; | |
1510 | case SS_DISCONNECTING: | |
1511 | break; | |
1512 | default: | |
1513 | pr_err("Unknown socket state %u\n", sock->state); | |
1514 | } | |
1515 | return retval; | |
1516 | } | |
1517 | ||
aba79f33 YX |
1518 | /** |
1519 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1520 | * @sk: socket | |
1521 | * @buf: message | |
1522 | * | |
1523 | * For all connection oriented messages, irrespective of importance, | |
1524 | * the default overload value (i.e. 67MB) is set as limit. | |
1525 | * | |
1526 | * For all connectionless messages, by default new queue limits are | |
1527 | * as belows: | |
1528 | * | |
cc79dd1b YX |
1529 | * TIPC_LOW_IMPORTANCE (4 MB) |
1530 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1531 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1532 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1533 | * |
1534 | * Returns overload limit according to corresponding message importance | |
1535 | */ | |
1536 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1537 | { | |
1538 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1539 | |
1540 | if (msg_connected(msg)) | |
0cee6bbe | 1541 | return sysctl_tipc_rmem[2]; |
1542 | ||
1543 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1544 | msg_importance(msg); | |
aba79f33 YX |
1545 | } |
1546 | ||
c4307285 | 1547 | /** |
0c3141e9 AS |
1548 | * filter_rcv - validate incoming message |
1549 | * @sk: socket | |
b97bf3fd | 1550 | * @buf: message |
c4307285 | 1551 | * |
0c3141e9 AS |
1552 | * Enqueues message on receive queue if acceptable; optionally handles |
1553 | * disconnect indication for a connected socket. | |
1554 | * | |
1555 | * Called with socket lock already taken; port lock may also be taken. | |
c4307285 | 1556 | * |
e4de5fab | 1557 | * Returns 0 (TIPC_OK) if message was consumed, -TIPC error code if message |
ac0074ee | 1558 | * to be rejected, 1 (TIPC_FWD_MSG) if (CONN_MANAGER) message to be forwarded |
b97bf3fd | 1559 | */ |
e4de5fab | 1560 | static int filter_rcv(struct sock *sk, struct sk_buff *buf) |
b97bf3fd | 1561 | { |
0c3141e9 | 1562 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1563 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd | 1564 | struct tipc_msg *msg = buf_msg(buf); |
aba79f33 | 1565 | unsigned int limit = rcvbuf_limit(sk, buf); |
ac0074ee | 1566 | u32 onode; |
e4de5fab | 1567 | int rc = TIPC_OK; |
b97bf3fd | 1568 | |
ac0074ee JPM |
1569 | if (unlikely(msg_user(msg) == CONN_MANAGER)) |
1570 | return tipc_sk_proto_rcv(tsk, &onode, buf); | |
ec8a2e56 | 1571 | |
50100a5e JPM |
1572 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
1573 | kfree_skb(buf); | |
1574 | tsk->link_cong = 0; | |
1575 | sk->sk_write_space(sk); | |
1576 | return TIPC_OK; | |
1577 | } | |
1578 | ||
b97bf3fd | 1579 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 | 1580 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
e4de5fab | 1581 | return -TIPC_ERR_NO_PORT; |
0c3141e9 | 1582 | |
b97bf3fd | 1583 | if (sock->state == SS_READY) { |
b29f1428 | 1584 | if (msg_connected(msg)) |
e4de5fab | 1585 | return -TIPC_ERR_NO_PORT; |
b97bf3fd | 1586 | } else { |
e4de5fab JPM |
1587 | rc = filter_connect(tsk, &buf); |
1588 | if (rc != TIPC_OK || buf == NULL) | |
1589 | return rc; | |
b97bf3fd PL |
1590 | } |
1591 | ||
1592 | /* Reject message if there isn't room to queue it */ | |
aba79f33 | 1593 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
e4de5fab | 1594 | return -TIPC_ERR_OVERLOAD; |
b97bf3fd | 1595 | |
aba79f33 | 1596 | /* Enqueue message */ |
40682432 | 1597 | TIPC_SKB_CB(buf)->handle = NULL; |
0c3141e9 | 1598 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
aba79f33 | 1599 | skb_set_owner_r(buf, sk); |
0c3141e9 | 1600 | |
676d2369 | 1601 | sk->sk_data_ready(sk); |
0c3141e9 AS |
1602 | return TIPC_OK; |
1603 | } | |
b97bf3fd | 1604 | |
0c3141e9 | 1605 | /** |
4f4482dc | 1606 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 AS |
1607 | * @sk: socket |
1608 | * @buf: message | |
1609 | * | |
1610 | * Caller must hold socket lock, but not port lock. | |
1611 | * | |
1612 | * Returns 0 | |
1613 | */ | |
4f4482dc | 1614 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf) |
0c3141e9 | 1615 | { |
e4de5fab | 1616 | int rc; |
8db1bae3 | 1617 | u32 onode; |
4f4482dc | 1618 | struct tipc_sock *tsk = tipc_sk(sk); |
02c00c2a | 1619 | uint truesize = buf->truesize; |
0c3141e9 | 1620 | |
e4de5fab | 1621 | rc = filter_rcv(sk, buf); |
4f4482dc | 1622 | |
ac0074ee JPM |
1623 | if (likely(!rc)) { |
1624 | if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT) | |
1625 | atomic_add(truesize, &tsk->dupl_rcvcnt); | |
1626 | return 0; | |
1627 | } | |
1628 | ||
1629 | if ((rc < 0) && !tipc_msg_reverse(buf, &onode, -rc)) | |
1630 | return 0; | |
1631 | ||
9fbfb8b1 | 1632 | tipc_link_xmit(buf, onode, 0); |
4f4482dc | 1633 | |
0c3141e9 AS |
1634 | return 0; |
1635 | } | |
1636 | ||
1637 | /** | |
24be34b5 | 1638 | * tipc_sk_rcv - handle incoming message |
9816f061 JPM |
1639 | * @buf: buffer containing arriving message |
1640 | * Consumes buffer | |
1641 | * Returns 0 if success, or errno: -EHOSTUNREACH | |
0c3141e9 | 1642 | */ |
9816f061 | 1643 | int tipc_sk_rcv(struct sk_buff *buf) |
0c3141e9 | 1644 | { |
9816f061 JPM |
1645 | struct tipc_sock *tsk; |
1646 | struct tipc_port *port; | |
1647 | struct sock *sk; | |
1648 | u32 dport = msg_destport(buf_msg(buf)); | |
e4de5fab | 1649 | int rc = TIPC_OK; |
4f4482dc | 1650 | uint limit; |
8db1bae3 | 1651 | u32 dnode; |
9816f061 | 1652 | |
5a379074 | 1653 | /* Validate destination and message */ |
9b50fd08 JPM |
1654 | tsk = tipc_port_lock(dport); |
1655 | if (unlikely(!tsk)) { | |
5a379074 | 1656 | rc = tipc_msg_eval(buf, &dnode); |
9816f061 JPM |
1657 | goto exit; |
1658 | } | |
9b50fd08 | 1659 | port = &tsk->port; |
9816f061 JPM |
1660 | sk = &tsk->sk; |
1661 | ||
1662 | /* Queue message */ | |
0c3141e9 | 1663 | bh_lock_sock(sk); |
9816f061 | 1664 | |
0c3141e9 | 1665 | if (!sock_owned_by_user(sk)) { |
e4de5fab | 1666 | rc = filter_rcv(sk, buf); |
0c3141e9 | 1667 | } else { |
4f4482dc JPM |
1668 | if (sk->sk_backlog.len == 0) |
1669 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
1670 | limit = rcvbuf_limit(sk, buf) + atomic_read(&tsk->dupl_rcvcnt); | |
1671 | if (sk_add_backlog(sk, buf, limit)) | |
e4de5fab | 1672 | rc = -TIPC_ERR_OVERLOAD; |
0c3141e9 AS |
1673 | } |
1674 | bh_unlock_sock(sk); | |
9816f061 | 1675 | tipc_port_unlock(port); |
0c3141e9 | 1676 | |
e4de5fab | 1677 | if (likely(!rc)) |
9816f061 JPM |
1678 | return 0; |
1679 | exit: | |
5a379074 | 1680 | if ((rc < 0) && !tipc_msg_reverse(buf, &dnode, -rc)) |
8db1bae3 | 1681 | return -EHOSTUNREACH; |
5a379074 | 1682 | |
9fbfb8b1 | 1683 | tipc_link_xmit(buf, dnode, 0); |
5a379074 | 1684 | return (rc < 0) ? -EHOSTUNREACH : 0; |
b97bf3fd PL |
1685 | } |
1686 | ||
78eb3a53 YX |
1687 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1688 | { | |
1689 | struct sock *sk = sock->sk; | |
1690 | DEFINE_WAIT(wait); | |
1691 | int done; | |
1692 | ||
1693 | do { | |
1694 | int err = sock_error(sk); | |
1695 | if (err) | |
1696 | return err; | |
1697 | if (!*timeo_p) | |
1698 | return -ETIMEDOUT; | |
1699 | if (signal_pending(current)) | |
1700 | return sock_intr_errno(*timeo_p); | |
1701 | ||
1702 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1703 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1704 | finish_wait(sk_sleep(sk), &wait); | |
1705 | } while (!done); | |
1706 | return 0; | |
1707 | } | |
1708 | ||
b97bf3fd | 1709 | /** |
247f0f3c | 1710 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1711 | * @sock: socket structure |
1712 | * @dest: socket address for destination port | |
1713 | * @destlen: size of socket address data structure | |
0c3141e9 | 1714 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1715 | * |
1716 | * Returns 0 on success, errno otherwise | |
1717 | */ | |
247f0f3c YX |
1718 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1719 | int destlen, int flags) | |
b97bf3fd | 1720 | { |
0c3141e9 | 1721 | struct sock *sk = sock->sk; |
b89741a0 AS |
1722 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1723 | struct msghdr m = {NULL,}; | |
78eb3a53 YX |
1724 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
1725 | socket_state previous; | |
b89741a0 AS |
1726 | int res; |
1727 | ||
0c3141e9 AS |
1728 | lock_sock(sk); |
1729 | ||
b89741a0 | 1730 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
0c3141e9 AS |
1731 | if (sock->state == SS_READY) { |
1732 | res = -EOPNOTSUPP; | |
1733 | goto exit; | |
1734 | } | |
b89741a0 | 1735 | |
b89741a0 AS |
1736 | /* |
1737 | * Reject connection attempt using multicast address | |
1738 | * | |
1739 | * Note: send_msg() validates the rest of the address fields, | |
1740 | * so there's no need to do it here | |
1741 | */ | |
0c3141e9 AS |
1742 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1743 | res = -EINVAL; | |
1744 | goto exit; | |
1745 | } | |
1746 | ||
78eb3a53 | 1747 | previous = sock->state; |
584d24b3 YX |
1748 | switch (sock->state) { |
1749 | case SS_UNCONNECTED: | |
1750 | /* Send a 'SYN-' to destination */ | |
1751 | m.msg_name = dest; | |
1752 | m.msg_namelen = destlen; | |
1753 | ||
1754 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1755 | * indicate send_msg() is never blocked. | |
1756 | */ | |
1757 | if (!timeout) | |
1758 | m.msg_flags = MSG_DONTWAIT; | |
1759 | ||
247f0f3c | 1760 | res = tipc_sendmsg(NULL, sock, &m, 0); |
584d24b3 YX |
1761 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1762 | goto exit; | |
1763 | ||
1764 | /* Just entered SS_CONNECTING state; the only | |
1765 | * difference is that return value in non-blocking | |
1766 | * case is EINPROGRESS, rather than EALREADY. | |
1767 | */ | |
1768 | res = -EINPROGRESS; | |
584d24b3 | 1769 | case SS_CONNECTING: |
78eb3a53 YX |
1770 | if (previous == SS_CONNECTING) |
1771 | res = -EALREADY; | |
1772 | if (!timeout) | |
1773 | goto exit; | |
1774 | timeout = msecs_to_jiffies(timeout); | |
1775 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1776 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1777 | break; |
1778 | case SS_CONNECTED: | |
1779 | res = -EISCONN; | |
1780 | break; | |
1781 | default: | |
1782 | res = -EINVAL; | |
78eb3a53 | 1783 | break; |
b89741a0 | 1784 | } |
0c3141e9 AS |
1785 | exit: |
1786 | release_sock(sk); | |
b89741a0 | 1787 | return res; |
b97bf3fd PL |
1788 | } |
1789 | ||
c4307285 | 1790 | /** |
247f0f3c | 1791 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1792 | * @sock: socket structure |
1793 | * @len: (unused) | |
c4307285 | 1794 | * |
b97bf3fd PL |
1795 | * Returns 0 on success, errno otherwise |
1796 | */ | |
247f0f3c | 1797 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1798 | { |
0c3141e9 AS |
1799 | struct sock *sk = sock->sk; |
1800 | int res; | |
1801 | ||
1802 | lock_sock(sk); | |
b97bf3fd | 1803 | |
245f3d34 | 1804 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1805 | res = -EINVAL; |
1806 | else { | |
1807 | sock->state = SS_LISTENING; | |
1808 | res = 0; | |
1809 | } | |
1810 | ||
1811 | release_sock(sk); | |
1812 | return res; | |
b97bf3fd PL |
1813 | } |
1814 | ||
6398e23c YX |
1815 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1816 | { | |
1817 | struct sock *sk = sock->sk; | |
1818 | DEFINE_WAIT(wait); | |
1819 | int err; | |
1820 | ||
1821 | /* True wake-one mechanism for incoming connections: only | |
1822 | * one process gets woken up, not the 'whole herd'. | |
1823 | * Since we do not 'race & poll' for established sockets | |
1824 | * anymore, the common case will execute the loop only once. | |
1825 | */ | |
1826 | for (;;) { | |
1827 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1828 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1829 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1830 | release_sock(sk); |
1831 | timeo = schedule_timeout(timeo); | |
1832 | lock_sock(sk); | |
1833 | } | |
1834 | err = 0; | |
1835 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1836 | break; | |
1837 | err = -EINVAL; | |
1838 | if (sock->state != SS_LISTENING) | |
1839 | break; | |
1840 | err = sock_intr_errno(timeo); | |
1841 | if (signal_pending(current)) | |
1842 | break; | |
1843 | err = -EAGAIN; | |
1844 | if (!timeo) | |
1845 | break; | |
1846 | } | |
1847 | finish_wait(sk_sleep(sk), &wait); | |
1848 | return err; | |
1849 | } | |
1850 | ||
c4307285 | 1851 | /** |
247f0f3c | 1852 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1853 | * @sock: listening socket |
1854 | * @newsock: new socket that is to be connected | |
1855 | * @flags: file-related flags associated with socket | |
c4307285 | 1856 | * |
b97bf3fd PL |
1857 | * Returns 0 on success, errno otherwise |
1858 | */ | |
247f0f3c | 1859 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1860 | { |
0fef8f20 | 1861 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1862 | struct sk_buff *buf; |
8826cde6 | 1863 | struct tipc_port *new_port; |
0fef8f20 | 1864 | struct tipc_msg *msg; |
6398e23c | 1865 | long timeo; |
0c3141e9 | 1866 | int res; |
b97bf3fd | 1867 | |
0c3141e9 | 1868 | lock_sock(sk); |
b97bf3fd | 1869 | |
0c3141e9 AS |
1870 | if (sock->state != SS_LISTENING) { |
1871 | res = -EINVAL; | |
b97bf3fd PL |
1872 | goto exit; |
1873 | } | |
6398e23c YX |
1874 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1875 | res = tipc_wait_for_accept(sock, timeo); | |
1876 | if (res) | |
1877 | goto exit; | |
0c3141e9 AS |
1878 | |
1879 | buf = skb_peek(&sk->sk_receive_queue); | |
1880 | ||
c5fa7b3c | 1881 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
1882 | if (res) |
1883 | goto exit; | |
b97bf3fd | 1884 | |
0fef8f20 | 1885 | new_sk = new_sock->sk; |
58ed9442 | 1886 | new_port = &tipc_sk(new_sk)->port; |
0fef8f20 | 1887 | msg = buf_msg(buf); |
b97bf3fd | 1888 | |
0fef8f20 PG |
1889 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
1890 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
1891 | ||
1892 | /* | |
1893 | * Reject any stray messages received by new socket | |
1894 | * before the socket lock was taken (very, very unlikely) | |
1895 | */ | |
1896 | reject_rx_queue(new_sk); | |
1897 | ||
1898 | /* Connect new socket to it's peer */ | |
dadebc00 | 1899 | tipc_sk_finish_conn(new_port, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
1900 | new_sock->state = SS_CONNECTED; |
1901 | ||
3b4f302d | 1902 | tipc_port_set_importance(new_port, msg_importance(msg)); |
0fef8f20 | 1903 | if (msg_named(msg)) { |
8826cde6 JPM |
1904 | new_port->conn_type = msg_nametype(msg); |
1905 | new_port->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 1906 | } |
0fef8f20 PG |
1907 | |
1908 | /* | |
1909 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
1910 | * Respond to 'SYN+' by queuing it on new socket. | |
1911 | */ | |
1912 | if (!msg_data_sz(msg)) { | |
1913 | struct msghdr m = {NULL,}; | |
1914 | ||
1915 | advance_rx_queue(sk); | |
247f0f3c | 1916 | tipc_send_packet(NULL, new_sock, &m, 0); |
0fef8f20 PG |
1917 | } else { |
1918 | __skb_dequeue(&sk->sk_receive_queue); | |
1919 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 1920 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
1921 | } |
1922 | release_sock(new_sk); | |
b97bf3fd | 1923 | exit: |
0c3141e9 | 1924 | release_sock(sk); |
b97bf3fd PL |
1925 | return res; |
1926 | } | |
1927 | ||
1928 | /** | |
247f0f3c | 1929 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 1930 | * @sock: socket structure |
e247a8f5 | 1931 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
1932 | * |
1933 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 1934 | * |
b97bf3fd PL |
1935 | * Returns 0 on success, errno otherwise |
1936 | */ | |
247f0f3c | 1937 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 1938 | { |
0c3141e9 | 1939 | struct sock *sk = sock->sk; |
58ed9442 JPM |
1940 | struct tipc_sock *tsk = tipc_sk(sk); |
1941 | struct tipc_port *port = &tsk->port; | |
b97bf3fd | 1942 | struct sk_buff *buf; |
80e44c22 | 1943 | u32 dnode; |
b97bf3fd PL |
1944 | int res; |
1945 | ||
e247a8f5 AS |
1946 | if (how != SHUT_RDWR) |
1947 | return -EINVAL; | |
b97bf3fd | 1948 | |
0c3141e9 | 1949 | lock_sock(sk); |
b97bf3fd PL |
1950 | |
1951 | switch (sock->state) { | |
0c3141e9 | 1952 | case SS_CONNECTING: |
b97bf3fd PL |
1953 | case SS_CONNECTED: |
1954 | ||
b97bf3fd | 1955 | restart: |
617d3c7a | 1956 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
0c3141e9 AS |
1957 | buf = __skb_dequeue(&sk->sk_receive_queue); |
1958 | if (buf) { | |
40682432 | 1959 | if (TIPC_SKB_CB(buf)->handle != NULL) { |
5f6d9123 | 1960 | kfree_skb(buf); |
b97bf3fd PL |
1961 | goto restart; |
1962 | } | |
80e44c22 JPM |
1963 | if (tipc_msg_reverse(buf, &dnode, TIPC_CONN_SHUTDOWN)) |
1964 | tipc_link_xmit(buf, dnode, port->ref); | |
dadebc00 | 1965 | tipc_node_remove_conn(dnode, port->ref); |
0c3141e9 | 1966 | } else { |
80e44c22 JPM |
1967 | dnode = tipc_port_peernode(port); |
1968 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
1969 | TIPC_CONN_MSG, SHORT_H_SIZE, | |
1970 | 0, dnode, tipc_own_addr, | |
1971 | tipc_port_peerport(port), | |
1972 | port->ref, TIPC_CONN_SHUTDOWN); | |
1973 | tipc_link_xmit(buf, dnode, port->ref); | |
b97bf3fd | 1974 | } |
dadebc00 | 1975 | port->connected = 0; |
0c3141e9 | 1976 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1977 | tipc_node_remove_conn(dnode, port->ref); |
b97bf3fd PL |
1978 | /* fall through */ |
1979 | ||
1980 | case SS_DISCONNECTING: | |
1981 | ||
75031151 | 1982 | /* Discard any unreceived messages */ |
57467e56 | 1983 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
1984 | |
1985 | /* Wake up anyone sleeping in poll */ | |
1986 | sk->sk_state_change(sk); | |
b97bf3fd PL |
1987 | res = 0; |
1988 | break; | |
1989 | ||
1990 | default: | |
1991 | res = -ENOTCONN; | |
1992 | } | |
1993 | ||
0c3141e9 | 1994 | release_sock(sk); |
b97bf3fd PL |
1995 | return res; |
1996 | } | |
1997 | ||
57289015 JPM |
1998 | static void tipc_sk_timeout(unsigned long ref) |
1999 | { | |
9b50fd08 JPM |
2000 | struct tipc_sock *tsk = tipc_port_lock(ref); |
2001 | struct tipc_port *port; | |
57289015 JPM |
2002 | struct sock *sk; |
2003 | struct sk_buff *buf = NULL; | |
2004 | struct tipc_msg *msg = NULL; | |
2005 | u32 peer_port, peer_node; | |
2006 | ||
9b50fd08 | 2007 | if (!tsk) |
57289015 JPM |
2008 | return; |
2009 | ||
9b50fd08 | 2010 | port = &tsk->port; |
57289015 JPM |
2011 | if (!port->connected) { |
2012 | tipc_port_unlock(port); | |
2013 | return; | |
2014 | } | |
57289015 JPM |
2015 | sk = &tsk->sk; |
2016 | bh_lock_sock(sk); | |
2017 | peer_port = tipc_port_peerport(port); | |
2018 | peer_node = tipc_port_peernode(port); | |
2019 | ||
2020 | if (port->probing_state == TIPC_CONN_PROBING) { | |
2021 | /* Previous probe not answered -> self abort */ | |
2022 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, | |
2023 | SHORT_H_SIZE, 0, tipc_own_addr, | |
2024 | peer_node, ref, peer_port, | |
2025 | TIPC_ERR_NO_PORT); | |
2026 | } else { | |
2027 | buf = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, | |
2028 | 0, peer_node, tipc_own_addr, | |
2029 | peer_port, ref, TIPC_OK); | |
2030 | port->probing_state = TIPC_CONN_PROBING; | |
2031 | k_start_timer(&port->timer, port->probing_interval); | |
2032 | } | |
2033 | bh_unlock_sock(sk); | |
2034 | tipc_port_unlock(port); | |
2035 | if (!buf) | |
2036 | return; | |
2037 | ||
2038 | msg = buf_msg(buf); | |
2039 | tipc_link_xmit(buf, msg_destnode(msg), msg_link_selector(msg)); | |
2040 | } | |
2041 | ||
5a9ee0be JPM |
2042 | static int tipc_sk_show(struct tipc_port *port, char *buf, |
2043 | int len, int full_id) | |
2044 | { | |
2045 | struct publication *publ; | |
2046 | int ret; | |
2047 | ||
2048 | if (full_id) | |
2049 | ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:", | |
2050 | tipc_zone(tipc_own_addr), | |
2051 | tipc_cluster(tipc_own_addr), | |
2052 | tipc_node(tipc_own_addr), port->ref); | |
2053 | else | |
2054 | ret = tipc_snprintf(buf, len, "%-10u:", port->ref); | |
2055 | ||
2056 | if (port->connected) { | |
2057 | u32 dport = tipc_port_peerport(port); | |
2058 | u32 destnode = tipc_port_peernode(port); | |
2059 | ||
2060 | ret += tipc_snprintf(buf + ret, len - ret, | |
2061 | " connected to <%u.%u.%u:%u>", | |
2062 | tipc_zone(destnode), | |
2063 | tipc_cluster(destnode), | |
2064 | tipc_node(destnode), dport); | |
2065 | if (port->conn_type != 0) | |
2066 | ret += tipc_snprintf(buf + ret, len - ret, | |
2067 | " via {%u,%u}", port->conn_type, | |
2068 | port->conn_instance); | |
2069 | } else if (port->published) { | |
2070 | ret += tipc_snprintf(buf + ret, len - ret, " bound to"); | |
2071 | list_for_each_entry(publ, &port->publications, pport_list) { | |
2072 | if (publ->lower == publ->upper) | |
2073 | ret += tipc_snprintf(buf + ret, len - ret, | |
2074 | " {%u,%u}", publ->type, | |
2075 | publ->lower); | |
2076 | else | |
2077 | ret += tipc_snprintf(buf + ret, len - ret, | |
2078 | " {%u,%u,%u}", publ->type, | |
2079 | publ->lower, publ->upper); | |
2080 | } | |
2081 | } | |
2082 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); | |
2083 | return ret; | |
2084 | } | |
2085 | ||
2086 | struct sk_buff *tipc_sk_socks_show(void) | |
2087 | { | |
2088 | struct sk_buff *buf; | |
2089 | struct tlv_desc *rep_tlv; | |
2090 | char *pb; | |
2091 | int pb_len; | |
2092 | struct tipc_sock *tsk; | |
2093 | int str_len = 0; | |
2094 | u32 ref = 0; | |
2095 | ||
2096 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); | |
2097 | if (!buf) | |
2098 | return NULL; | |
2099 | rep_tlv = (struct tlv_desc *)buf->data; | |
2100 | pb = TLV_DATA(rep_tlv); | |
2101 | pb_len = ULTRA_STRING_MAX_LEN; | |
2102 | ||
2103 | tsk = tipc_sk_lock_next(&ref); | |
2104 | for (; tsk; tsk = tipc_sk_lock_next(&ref)) { | |
2105 | bh_lock_sock(&tsk->sk); | |
2106 | str_len += tipc_sk_show(&tsk->port, pb + str_len, | |
2107 | pb_len - str_len, 0); | |
2108 | bh_unlock_sock(&tsk->sk); | |
2109 | tipc_port_unlock(&tsk->port); | |
2110 | } | |
2111 | str_len += 1; /* for "\0" */ | |
2112 | skb_put(buf, TLV_SPACE(str_len)); | |
2113 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); | |
2114 | ||
2115 | return buf; | |
2116 | } | |
2117 | ||
2118 | /* tipc_sk_reinit: set non-zero address in all existing sockets | |
2119 | * when we go from standalone to network mode. | |
2120 | */ | |
2121 | void tipc_sk_reinit(void) | |
2122 | { | |
2123 | struct tipc_msg *msg; | |
2124 | u32 ref = 0; | |
2125 | struct tipc_sock *tsk = tipc_sk_lock_next(&ref); | |
2126 | ||
2127 | for (; tsk; tsk = tipc_sk_lock_next(&ref)) { | |
2128 | bh_lock_sock(&tsk->sk); | |
2129 | msg = &tsk->port.phdr; | |
2130 | msg_set_prevnode(msg, tipc_own_addr); | |
2131 | msg_set_orignode(msg, tipc_own_addr); | |
2132 | bh_unlock_sock(&tsk->sk); | |
2133 | tipc_port_unlock(&tsk->port); | |
2134 | } | |
2135 | } | |
2136 | ||
b97bf3fd | 2137 | /** |
247f0f3c | 2138 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2139 | * @sock: socket structure |
2140 | * @lvl: option level | |
2141 | * @opt: option identifier | |
2142 | * @ov: pointer to new option value | |
2143 | * @ol: length of option value | |
c4307285 YH |
2144 | * |
2145 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2146 | * (to ease compatibility). |
c4307285 | 2147 | * |
b97bf3fd PL |
2148 | * Returns 0 on success, errno otherwise |
2149 | */ | |
247f0f3c YX |
2150 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2151 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2152 | { |
0c3141e9 | 2153 | struct sock *sk = sock->sk; |
58ed9442 JPM |
2154 | struct tipc_sock *tsk = tipc_sk(sk); |
2155 | struct tipc_port *port = &tsk->port; | |
b97bf3fd PL |
2156 | u32 value; |
2157 | int res; | |
2158 | ||
c4307285 YH |
2159 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2160 | return 0; | |
b97bf3fd PL |
2161 | if (lvl != SOL_TIPC) |
2162 | return -ENOPROTOOPT; | |
2163 | if (ol < sizeof(value)) | |
2164 | return -EINVAL; | |
2db9983a AS |
2165 | res = get_user(value, (u32 __user *)ov); |
2166 | if (res) | |
b97bf3fd PL |
2167 | return res; |
2168 | ||
0c3141e9 | 2169 | lock_sock(sk); |
c4307285 | 2170 | |
b97bf3fd PL |
2171 | switch (opt) { |
2172 | case TIPC_IMPORTANCE: | |
ac32c7f7 | 2173 | res = tipc_port_set_importance(port, value); |
b97bf3fd PL |
2174 | break; |
2175 | case TIPC_SRC_DROPPABLE: | |
2176 | if (sock->type != SOCK_STREAM) | |
58ed9442 | 2177 | tipc_port_set_unreliable(port, value); |
c4307285 | 2178 | else |
b97bf3fd PL |
2179 | res = -ENOPROTOOPT; |
2180 | break; | |
2181 | case TIPC_DEST_DROPPABLE: | |
58ed9442 | 2182 | tipc_port_set_unreturnable(port, value); |
b97bf3fd PL |
2183 | break; |
2184 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2185 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2186 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2187 | break; |
2188 | default: | |
2189 | res = -EINVAL; | |
2190 | } | |
2191 | ||
0c3141e9 AS |
2192 | release_sock(sk); |
2193 | ||
b97bf3fd PL |
2194 | return res; |
2195 | } | |
2196 | ||
2197 | /** | |
247f0f3c | 2198 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2199 | * @sock: socket structure |
2200 | * @lvl: option level | |
2201 | * @opt: option identifier | |
2202 | * @ov: receptacle for option value | |
2203 | * @ol: receptacle for length of option value | |
c4307285 YH |
2204 | * |
2205 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2206 | * (to ease compatibility). |
c4307285 | 2207 | * |
b97bf3fd PL |
2208 | * Returns 0 on success, errno otherwise |
2209 | */ | |
247f0f3c YX |
2210 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2211 | char __user *ov, int __user *ol) | |
b97bf3fd | 2212 | { |
0c3141e9 | 2213 | struct sock *sk = sock->sk; |
58ed9442 JPM |
2214 | struct tipc_sock *tsk = tipc_sk(sk); |
2215 | struct tipc_port *port = &tsk->port; | |
c4307285 | 2216 | int len; |
b97bf3fd | 2217 | u32 value; |
c4307285 | 2218 | int res; |
b97bf3fd | 2219 | |
c4307285 YH |
2220 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2221 | return put_user(0, ol); | |
b97bf3fd PL |
2222 | if (lvl != SOL_TIPC) |
2223 | return -ENOPROTOOPT; | |
2db9983a AS |
2224 | res = get_user(len, ol); |
2225 | if (res) | |
c4307285 | 2226 | return res; |
b97bf3fd | 2227 | |
0c3141e9 | 2228 | lock_sock(sk); |
b97bf3fd PL |
2229 | |
2230 | switch (opt) { | |
2231 | case TIPC_IMPORTANCE: | |
58ed9442 | 2232 | value = tipc_port_importance(port); |
b97bf3fd PL |
2233 | break; |
2234 | case TIPC_SRC_DROPPABLE: | |
58ed9442 | 2235 | value = tipc_port_unreliable(port); |
b97bf3fd PL |
2236 | break; |
2237 | case TIPC_DEST_DROPPABLE: | |
58ed9442 | 2238 | value = tipc_port_unreturnable(port); |
b97bf3fd PL |
2239 | break; |
2240 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2241 | value = tipc_sk(sk)->conn_timeout; |
0c3141e9 | 2242 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2243 | break; |
0e65967e | 2244 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2245 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2246 | break; |
0e65967e | 2247 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2248 | value = skb_queue_len(&sk->sk_receive_queue); |
2249 | break; | |
b97bf3fd PL |
2250 | default: |
2251 | res = -EINVAL; | |
2252 | } | |
2253 | ||
0c3141e9 AS |
2254 | release_sock(sk); |
2255 | ||
25860c3b PG |
2256 | if (res) |
2257 | return res; /* "get" failed */ | |
b97bf3fd | 2258 | |
25860c3b PG |
2259 | if (len < sizeof(value)) |
2260 | return -EINVAL; | |
2261 | ||
2262 | if (copy_to_user(ov, &value, sizeof(value))) | |
2263 | return -EFAULT; | |
2264 | ||
2265 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2266 | } |
2267 | ||
52f50ce5 | 2268 | static int tipc_ioctl(struct socket *sk, unsigned int cmd, unsigned long arg) |
78acb1f9 EH |
2269 | { |
2270 | struct tipc_sioc_ln_req lnr; | |
2271 | void __user *argp = (void __user *)arg; | |
2272 | ||
2273 | switch (cmd) { | |
2274 | case SIOCGETLINKNAME: | |
2275 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2276 | return -EFAULT; | |
2277 | if (!tipc_node_get_linkname(lnr.bearer_id, lnr.peer, | |
2278 | lnr.linkname, TIPC_MAX_LINK_NAME)) { | |
2279 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2280 | return -EFAULT; | |
2281 | return 0; | |
2282 | } | |
2283 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2284 | default: |
2285 | return -ENOIOCTLCMD; | |
2286 | } | |
2287 | } | |
2288 | ||
ae86b9e3 BH |
2289 | /* Protocol switches for the various types of TIPC sockets */ |
2290 | ||
bca65eae | 2291 | static const struct proto_ops msg_ops = { |
0e65967e | 2292 | .owner = THIS_MODULE, |
b97bf3fd | 2293 | .family = AF_TIPC, |
247f0f3c YX |
2294 | .release = tipc_release, |
2295 | .bind = tipc_bind, | |
2296 | .connect = tipc_connect, | |
5eee6a6d | 2297 | .socketpair = sock_no_socketpair, |
245f3d34 | 2298 | .accept = sock_no_accept, |
247f0f3c YX |
2299 | .getname = tipc_getname, |
2300 | .poll = tipc_poll, | |
78acb1f9 | 2301 | .ioctl = tipc_ioctl, |
245f3d34 | 2302 | .listen = sock_no_listen, |
247f0f3c YX |
2303 | .shutdown = tipc_shutdown, |
2304 | .setsockopt = tipc_setsockopt, | |
2305 | .getsockopt = tipc_getsockopt, | |
2306 | .sendmsg = tipc_sendmsg, | |
2307 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2308 | .mmap = sock_no_mmap, |
2309 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2310 | }; |
2311 | ||
bca65eae | 2312 | static const struct proto_ops packet_ops = { |
0e65967e | 2313 | .owner = THIS_MODULE, |
b97bf3fd | 2314 | .family = AF_TIPC, |
247f0f3c YX |
2315 | .release = tipc_release, |
2316 | .bind = tipc_bind, | |
2317 | .connect = tipc_connect, | |
5eee6a6d | 2318 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2319 | .accept = tipc_accept, |
2320 | .getname = tipc_getname, | |
2321 | .poll = tipc_poll, | |
78acb1f9 | 2322 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2323 | .listen = tipc_listen, |
2324 | .shutdown = tipc_shutdown, | |
2325 | .setsockopt = tipc_setsockopt, | |
2326 | .getsockopt = tipc_getsockopt, | |
2327 | .sendmsg = tipc_send_packet, | |
2328 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2329 | .mmap = sock_no_mmap, |
2330 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2331 | }; |
2332 | ||
bca65eae | 2333 | static const struct proto_ops stream_ops = { |
0e65967e | 2334 | .owner = THIS_MODULE, |
b97bf3fd | 2335 | .family = AF_TIPC, |
247f0f3c YX |
2336 | .release = tipc_release, |
2337 | .bind = tipc_bind, | |
2338 | .connect = tipc_connect, | |
5eee6a6d | 2339 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2340 | .accept = tipc_accept, |
2341 | .getname = tipc_getname, | |
2342 | .poll = tipc_poll, | |
78acb1f9 | 2343 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2344 | .listen = tipc_listen, |
2345 | .shutdown = tipc_shutdown, | |
2346 | .setsockopt = tipc_setsockopt, | |
2347 | .getsockopt = tipc_getsockopt, | |
2348 | .sendmsg = tipc_send_stream, | |
2349 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2350 | .mmap = sock_no_mmap, |
2351 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2352 | }; |
2353 | ||
bca65eae | 2354 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2355 | .owner = THIS_MODULE, |
b97bf3fd | 2356 | .family = AF_TIPC, |
c5fa7b3c | 2357 | .create = tipc_sk_create |
b97bf3fd PL |
2358 | }; |
2359 | ||
2360 | static struct proto tipc_proto = { | |
2361 | .name = "TIPC", | |
2362 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2363 | .obj_size = sizeof(struct tipc_sock), |
2364 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2365 | }; |
2366 | ||
c5fa7b3c YX |
2367 | static struct proto tipc_proto_kern = { |
2368 | .name = "TIPC", | |
2369 | .obj_size = sizeof(struct tipc_sock), | |
2370 | .sysctl_rmem = sysctl_tipc_rmem | |
2371 | }; | |
2372 | ||
b97bf3fd | 2373 | /** |
4323add6 | 2374 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2375 | * |
b97bf3fd PL |
2376 | * Returns 0 on success, errno otherwise |
2377 | */ | |
4323add6 | 2378 | int tipc_socket_init(void) |
b97bf3fd PL |
2379 | { |
2380 | int res; | |
2381 | ||
c4307285 | 2382 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2383 | if (res) { |
2cf8aa19 | 2384 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2385 | goto out; |
2386 | } | |
2387 | ||
2388 | res = sock_register(&tipc_family_ops); | |
2389 | if (res) { | |
2cf8aa19 | 2390 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2391 | proto_unregister(&tipc_proto); |
2392 | goto out; | |
2393 | } | |
b97bf3fd PL |
2394 | out: |
2395 | return res; | |
2396 | } | |
2397 | ||
2398 | /** | |
4323add6 | 2399 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2400 | */ |
4323add6 | 2401 | void tipc_socket_stop(void) |
b97bf3fd | 2402 | { |
b97bf3fd PL |
2403 | sock_unregister(tipc_family_ops.family); |
2404 | proto_unregister(&tipc_proto); | |
2405 | } |