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Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
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" |
b97bf3fd | 39 | |
2cf8aa19 | 40 | #include <linux/export.h> |
2cf8aa19 | 41 | |
b97bf3fd PL |
42 | #define SS_LISTENING -1 /* socket is listening */ |
43 | #define SS_READY -2 /* socket is connectionless */ | |
44 | ||
3654ea02 | 45 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
b97bf3fd | 46 | |
0c3141e9 | 47 | static int backlog_rcv(struct sock *sk, struct sk_buff *skb); |
f288bef4 YX |
48 | static void tipc_data_ready(struct sock *sk, int len); |
49 | static void tipc_write_space(struct sock *sk); | |
247f0f3c YX |
50 | static int tipc_release(struct socket *sock); |
51 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
b97bf3fd | 52 | |
bca65eae FW |
53 | static const struct proto_ops packet_ops; |
54 | static const struct proto_ops stream_ops; | |
55 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
56 | |
57 | static struct proto tipc_proto; | |
c5fa7b3c | 58 | static struct proto tipc_proto_kern; |
b97bf3fd | 59 | |
c4307285 | 60 | /* |
0c3141e9 AS |
61 | * Revised TIPC socket locking policy: |
62 | * | |
63 | * Most socket operations take the standard socket lock when they start | |
64 | * and hold it until they finish (or until they need to sleep). Acquiring | |
65 | * this lock grants the owner exclusive access to the fields of the socket | |
66 | * data structures, with the exception of the backlog queue. A few socket | |
67 | * operations can be done without taking the socket lock because they only | |
68 | * read socket information that never changes during the life of the socket. | |
69 | * | |
70 | * Socket operations may acquire the lock for the associated TIPC port if they | |
71 | * need to perform an operation on the port. If any routine needs to acquire | |
72 | * both the socket lock and the port lock it must take the socket lock first | |
73 | * to avoid the risk of deadlock. | |
74 | * | |
75 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
76 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
77 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
78 | * and either handles the message itself or adds it to the socket's backlog | |
79 | * queue; in the latter case the queued message is processed once the process | |
80 | * owning the socket lock releases it. | |
81 | * | |
82 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
83 | * the problem of a blocked socket operation preventing any other operations | |
84 | * from occurring. However, applications must be careful if they have | |
85 | * multiple threads trying to send (or receive) on the same socket, as these | |
86 | * operations might interfere with each other. For example, doing a connect | |
87 | * and a receive at the same time might allow the receive to consume the | |
88 | * ACK message meant for the connect. While additional work could be done | |
89 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
90 | * | |
91 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
92 | * that another operation that must be performed in a non-blocking manner is | |
93 | * not delayed for very long because the lock has already been taken. | |
94 | * | |
95 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
96 | * constant over its lifetime; such fields can be examined without taking | |
97 | * the socket lock and/or port lock, and do not need to be re-read even | |
98 | * after resuming processing after waiting. These fields include: | |
99 | * - socket type | |
100 | * - pointer to socket sk structure (aka tipc_sock structure) | |
101 | * - pointer to port structure | |
102 | * - port reference | |
103 | */ | |
104 | ||
8826cde6 JPM |
105 | #include "socket.h" |
106 | ||
0c3141e9 AS |
107 | /** |
108 | * advance_rx_queue - discard first buffer in socket receive queue | |
109 | * | |
110 | * Caller must hold socket lock | |
b97bf3fd | 111 | */ |
0c3141e9 | 112 | static void advance_rx_queue(struct sock *sk) |
b97bf3fd | 113 | { |
5f6d9123 | 114 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
115 | } |
116 | ||
b97bf3fd | 117 | /** |
0c3141e9 AS |
118 | * reject_rx_queue - reject all buffers in socket receive queue |
119 | * | |
120 | * Caller must hold socket lock | |
b97bf3fd | 121 | */ |
0c3141e9 | 122 | static void reject_rx_queue(struct sock *sk) |
b97bf3fd | 123 | { |
0c3141e9 AS |
124 | struct sk_buff *buf; |
125 | ||
9da3d475 | 126 | while ((buf = __skb_dequeue(&sk->sk_receive_queue))) |
0c3141e9 | 127 | tipc_reject_msg(buf, TIPC_ERR_NO_PORT); |
b97bf3fd PL |
128 | } |
129 | ||
130 | /** | |
c5fa7b3c | 131 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 132 | * @net: network namespace (must be default network) |
b97bf3fd PL |
133 | * @sock: pre-allocated socket structure |
134 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 135 | * @kern: caused by kernel or by userspace? |
c4307285 | 136 | * |
0c3141e9 AS |
137 | * This routine creates additional data structures used by the TIPC socket, |
138 | * initializes them, and links them together. | |
b97bf3fd PL |
139 | * |
140 | * Returns 0 on success, errno otherwise | |
141 | */ | |
c5fa7b3c YX |
142 | static int tipc_sk_create(struct net *net, struct socket *sock, int protocol, |
143 | int kern) | |
b97bf3fd | 144 | { |
0c3141e9 AS |
145 | const struct proto_ops *ops; |
146 | socket_state state; | |
b97bf3fd | 147 | struct sock *sk; |
7ef43eba | 148 | struct tipc_port *tp_ptr; |
0c3141e9 AS |
149 | |
150 | /* Validate arguments */ | |
b97bf3fd PL |
151 | if (unlikely(protocol != 0)) |
152 | return -EPROTONOSUPPORT; | |
153 | ||
b97bf3fd PL |
154 | switch (sock->type) { |
155 | case SOCK_STREAM: | |
0c3141e9 AS |
156 | ops = &stream_ops; |
157 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
158 | break; |
159 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
160 | ops = &packet_ops; |
161 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
162 | break; |
163 | case SOCK_DGRAM: | |
b97bf3fd | 164 | case SOCK_RDM: |
0c3141e9 AS |
165 | ops = &msg_ops; |
166 | state = SS_READY; | |
b97bf3fd | 167 | break; |
49978651 | 168 | default: |
49978651 | 169 | return -EPROTOTYPE; |
b97bf3fd PL |
170 | } |
171 | ||
0c3141e9 | 172 | /* Allocate socket's protocol area */ |
c5fa7b3c YX |
173 | if (!kern) |
174 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); | |
175 | else | |
176 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); | |
177 | ||
0c3141e9 | 178 | if (sk == NULL) |
b97bf3fd | 179 | return -ENOMEM; |
b97bf3fd | 180 | |
24be34b5 JPM |
181 | tp_ptr = tipc_sk_port(sk); |
182 | if (!tipc_port_init(tp_ptr, TIPC_LOW_IMPORTANCE)) { | |
0c3141e9 AS |
183 | sk_free(sk); |
184 | return -ENOMEM; | |
185 | } | |
b97bf3fd | 186 | |
0c3141e9 | 187 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
188 | sock->ops = ops; |
189 | sock->state = state; | |
b97bf3fd | 190 | |
0c3141e9 | 191 | sock_init_data(sock, sk); |
0c3141e9 | 192 | sk->sk_backlog_rcv = backlog_rcv; |
cc79dd1b | 193 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
194 | sk->sk_data_ready = tipc_data_ready; |
195 | sk->sk_write_space = tipc_write_space; | |
a0f40f02 | 196 | tipc_sk(sk)->conn_timeout = CONN_TIMEOUT_DEFAULT; |
7ef43eba AS |
197 | spin_unlock_bh(tp_ptr->lock); |
198 | ||
0c3141e9 | 199 | if (sock->state == SS_READY) { |
3b4f302d | 200 | tipc_port_set_unreturnable(tp_ptr, true); |
0c3141e9 | 201 | if (sock->type == SOCK_DGRAM) |
3b4f302d | 202 | tipc_port_set_unreliable(tp_ptr, true); |
0c3141e9 | 203 | } |
b97bf3fd PL |
204 | return 0; |
205 | } | |
206 | ||
c5fa7b3c YX |
207 | /** |
208 | * tipc_sock_create_local - create TIPC socket from inside TIPC module | |
209 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET | |
210 | * | |
211 | * We cannot use sock_creat_kern here because it bumps module user count. | |
212 | * Since socket owner and creator is the same module we must make sure | |
213 | * that module count remains zero for module local sockets, otherwise | |
214 | * we cannot do rmmod. | |
215 | * | |
216 | * Returns 0 on success, errno otherwise | |
217 | */ | |
218 | int tipc_sock_create_local(int type, struct socket **res) | |
219 | { | |
220 | int rc; | |
c5fa7b3c YX |
221 | |
222 | rc = sock_create_lite(AF_TIPC, type, 0, res); | |
223 | if (rc < 0) { | |
224 | pr_err("Failed to create kernel socket\n"); | |
225 | return rc; | |
226 | } | |
227 | tipc_sk_create(&init_net, *res, 0, 1); | |
228 | ||
c5fa7b3c YX |
229 | return 0; |
230 | } | |
231 | ||
232 | /** | |
233 | * tipc_sock_release_local - release socket created by tipc_sock_create_local | |
234 | * @sock: the socket to be released. | |
235 | * | |
236 | * Module reference count is not incremented when such sockets are created, | |
237 | * so we must keep it from being decremented when they are released. | |
238 | */ | |
239 | void tipc_sock_release_local(struct socket *sock) | |
240 | { | |
247f0f3c | 241 | tipc_release(sock); |
c5fa7b3c YX |
242 | sock->ops = NULL; |
243 | sock_release(sock); | |
244 | } | |
245 | ||
246 | /** | |
247 | * tipc_sock_accept_local - accept a connection on a socket created | |
248 | * with tipc_sock_create_local. Use this function to avoid that | |
249 | * module reference count is inadvertently incremented. | |
250 | * | |
251 | * @sock: the accepting socket | |
252 | * @newsock: reference to the new socket to be created | |
253 | * @flags: socket flags | |
254 | */ | |
255 | ||
256 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, | |
ae8509c4 | 257 | int flags) |
c5fa7b3c YX |
258 | { |
259 | struct sock *sk = sock->sk; | |
260 | int ret; | |
261 | ||
262 | ret = sock_create_lite(sk->sk_family, sk->sk_type, | |
263 | sk->sk_protocol, newsock); | |
264 | if (ret < 0) | |
265 | return ret; | |
266 | ||
247f0f3c | 267 | ret = tipc_accept(sock, *newsock, flags); |
c5fa7b3c YX |
268 | if (ret < 0) { |
269 | sock_release(*newsock); | |
270 | return ret; | |
271 | } | |
272 | (*newsock)->ops = sock->ops; | |
273 | return ret; | |
274 | } | |
275 | ||
b97bf3fd | 276 | /** |
247f0f3c | 277 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
278 | * @sock: socket to destroy |
279 | * | |
280 | * This routine cleans up any messages that are still queued on the socket. | |
281 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
282 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
283 | * and any others are discarded. (If the first message on a STREAM socket | |
284 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 285 | * |
b97bf3fd PL |
286 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
287 | * are returned or discarded according to the "destination droppable" setting | |
288 | * specified for the message by the sender. | |
289 | * | |
290 | * Returns 0 on success, errno otherwise | |
291 | */ | |
247f0f3c | 292 | static int tipc_release(struct socket *sock) |
b97bf3fd | 293 | { |
b97bf3fd | 294 | struct sock *sk = sock->sk; |
0c3141e9 | 295 | struct tipc_port *tport; |
b97bf3fd | 296 | struct sk_buff *buf; |
0c3141e9 | 297 | int res; |
b97bf3fd | 298 | |
0c3141e9 AS |
299 | /* |
300 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
301 | * releases a pre-allocated child socket that was never used) | |
302 | */ | |
0c3141e9 | 303 | if (sk == NULL) |
b97bf3fd | 304 | return 0; |
c4307285 | 305 | |
0c3141e9 AS |
306 | tport = tipc_sk_port(sk); |
307 | lock_sock(sk); | |
308 | ||
309 | /* | |
310 | * Reject all unreceived messages, except on an active connection | |
311 | * (which disconnects locally & sends a 'FIN+' to peer) | |
312 | */ | |
b97bf3fd | 313 | while (sock->state != SS_DISCONNECTING) { |
0c3141e9 AS |
314 | buf = __skb_dequeue(&sk->sk_receive_queue); |
315 | if (buf == NULL) | |
b97bf3fd | 316 | break; |
40682432 | 317 | if (TIPC_SKB_CB(buf)->handle != NULL) |
5f6d9123 | 318 | kfree_skb(buf); |
0c3141e9 AS |
319 | else { |
320 | if ((sock->state == SS_CONNECTING) || | |
321 | (sock->state == SS_CONNECTED)) { | |
322 | sock->state = SS_DISCONNECTING; | |
247f0f3c | 323 | tipc_port_disconnect(tport->ref); |
0c3141e9 | 324 | } |
b97bf3fd | 325 | tipc_reject_msg(buf, TIPC_ERR_NO_PORT); |
0c3141e9 | 326 | } |
b97bf3fd PL |
327 | } |
328 | ||
0c3141e9 AS |
329 | /* |
330 | * Delete TIPC port; this ensures no more messages are queued | |
331 | * (also disconnects an active connection & sends a 'FIN-' to peer) | |
332 | */ | |
24be34b5 | 333 | tipc_port_destroy(tport); |
b97bf3fd | 334 | |
0c3141e9 | 335 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 336 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 337 | |
0c3141e9 | 338 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
339 | sock->state = SS_DISCONNECTING; |
340 | release_sock(sk); | |
b97bf3fd PL |
341 | |
342 | sock_put(sk); | |
0c3141e9 | 343 | sock->sk = NULL; |
b97bf3fd | 344 | |
b97bf3fd PL |
345 | return res; |
346 | } | |
347 | ||
348 | /** | |
247f0f3c | 349 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
350 | * @sock: socket structure |
351 | * @uaddr: socket address describing name(s) and desired operation | |
352 | * @uaddr_len: size of socket address data structure | |
c4307285 | 353 | * |
b97bf3fd PL |
354 | * Name and name sequence binding is indicated using a positive scope value; |
355 | * a negative scope value unbinds the specified name. Specifying no name | |
356 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 357 | * |
b97bf3fd | 358 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
359 | * |
360 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
361 | * access any non-constant socket information. | |
b97bf3fd | 362 | */ |
247f0f3c YX |
363 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
364 | int uaddr_len) | |
b97bf3fd | 365 | { |
84602761 | 366 | struct sock *sk = sock->sk; |
b97bf3fd | 367 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
84602761 YX |
368 | struct tipc_port *tport = tipc_sk_port(sock->sk); |
369 | int res = -EINVAL; | |
b97bf3fd | 370 | |
84602761 YX |
371 | lock_sock(sk); |
372 | if (unlikely(!uaddr_len)) { | |
373 | res = tipc_withdraw(tport, 0, NULL); | |
374 | goto exit; | |
375 | } | |
c4307285 | 376 | |
84602761 YX |
377 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
378 | res = -EINVAL; | |
379 | goto exit; | |
380 | } | |
381 | if (addr->family != AF_TIPC) { | |
382 | res = -EAFNOSUPPORT; | |
383 | goto exit; | |
384 | } | |
b97bf3fd | 385 | |
b97bf3fd PL |
386 | if (addr->addrtype == TIPC_ADDR_NAME) |
387 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
388 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
389 | res = -EAFNOSUPPORT; | |
390 | goto exit; | |
391 | } | |
c4307285 | 392 | |
13a2e898 | 393 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 394 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
395 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
396 | res = -EACCES; | |
397 | goto exit; | |
398 | } | |
c422f1bd | 399 | |
84602761 YX |
400 | res = (addr->scope > 0) ? |
401 | tipc_publish(tport, addr->scope, &addr->addr.nameseq) : | |
402 | tipc_withdraw(tport, -addr->scope, &addr->addr.nameseq); | |
403 | exit: | |
404 | release_sock(sk); | |
405 | return res; | |
b97bf3fd PL |
406 | } |
407 | ||
c4307285 | 408 | /** |
247f0f3c | 409 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
410 | * @sock: socket structure |
411 | * @uaddr: area for returned socket address | |
412 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 413 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 414 | * |
b97bf3fd | 415 | * Returns 0 on success, errno otherwise |
0c3141e9 | 416 | * |
2da59918 AS |
417 | * NOTE: This routine doesn't need to take the socket lock since it only |
418 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 419 | * a completely predictable manner). |
b97bf3fd | 420 | */ |
247f0f3c YX |
421 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
422 | int *uaddr_len, int peer) | |
b97bf3fd | 423 | { |
b97bf3fd | 424 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
8826cde6 | 425 | struct tipc_port *port = tipc_sk_port(sock->sk); |
b97bf3fd | 426 | |
88f8a5e3 | 427 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 428 | if (peer) { |
2da59918 AS |
429 | if ((sock->state != SS_CONNECTED) && |
430 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
431 | return -ENOTCONN; | |
8826cde6 JPM |
432 | addr->addr.id.ref = tipc_port_peerport(port); |
433 | addr->addr.id.node = tipc_port_peernode(port); | |
0c3141e9 | 434 | } else { |
8826cde6 | 435 | addr->addr.id.ref = port->ref; |
b924dcf0 | 436 | addr->addr.id.node = tipc_own_addr; |
0c3141e9 | 437 | } |
b97bf3fd PL |
438 | |
439 | *uaddr_len = sizeof(*addr); | |
440 | addr->addrtype = TIPC_ADDR_ID; | |
441 | addr->family = AF_TIPC; | |
442 | addr->scope = 0; | |
b97bf3fd PL |
443 | addr->addr.name.domain = 0; |
444 | ||
0c3141e9 | 445 | return 0; |
b97bf3fd PL |
446 | } |
447 | ||
448 | /** | |
247f0f3c | 449 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
450 | * @file: file structure associated with the socket |
451 | * @sock: socket for which to calculate the poll bits | |
452 | * @wait: ??? | |
453 | * | |
9b674e82 AS |
454 | * Returns pollmask value |
455 | * | |
456 | * COMMENTARY: | |
457 | * It appears that the usual socket locking mechanisms are not useful here | |
458 | * since the pollmask info is potentially out-of-date the moment this routine | |
459 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
460 | * to handle any preventable race conditions, so TIPC will do the same ... | |
461 | * | |
462 | * TIPC sets the returned events as follows: | |
f662c070 AS |
463 | * |
464 | * socket state flags set | |
465 | * ------------ --------- | |
466 | * unconnected no read flags | |
c4fc298a | 467 | * POLLOUT if port is not congested |
f662c070 AS |
468 | * |
469 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
470 | * no write flags | |
471 | * | |
472 | * connected POLLIN/POLLRDNORM if data in rx queue | |
473 | * POLLOUT if port is not congested | |
474 | * | |
475 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
476 | * no write flags | |
477 | * | |
478 | * listening POLLIN if SYN in rx queue | |
479 | * no write flags | |
480 | * | |
481 | * ready POLLIN/POLLRDNORM if data in rx queue | |
482 | * [connectionless] POLLOUT (since port cannot be congested) | |
483 | * | |
484 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
485 | * imply that the operation will succeed, merely that it should be performed | |
486 | * and will not block. | |
b97bf3fd | 487 | */ |
247f0f3c YX |
488 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
489 | poll_table *wait) | |
b97bf3fd | 490 | { |
9b674e82 | 491 | struct sock *sk = sock->sk; |
f662c070 | 492 | u32 mask = 0; |
9b674e82 | 493 | |
f288bef4 | 494 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 495 | |
f662c070 | 496 | switch ((int)sock->state) { |
c4fc298a EH |
497 | case SS_UNCONNECTED: |
498 | if (!tipc_sk_port(sk)->congested) | |
499 | mask |= POLLOUT; | |
500 | break; | |
f662c070 AS |
501 | case SS_READY: |
502 | case SS_CONNECTED: | |
503 | if (!tipc_sk_port(sk)->congested) | |
504 | mask |= POLLOUT; | |
505 | /* fall thru' */ | |
506 | case SS_CONNECTING: | |
507 | case SS_LISTENING: | |
508 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
509 | mask |= (POLLIN | POLLRDNORM); | |
510 | break; | |
511 | case SS_DISCONNECTING: | |
512 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
513 | break; | |
514 | } | |
9b674e82 AS |
515 | |
516 | return mask; | |
b97bf3fd PL |
517 | } |
518 | ||
c4307285 | 519 | /** |
b97bf3fd PL |
520 | * dest_name_check - verify user is permitted to send to specified port name |
521 | * @dest: destination address | |
522 | * @m: descriptor for message to be sent | |
c4307285 | 523 | * |
b97bf3fd PL |
524 | * Prevents restricted configuration commands from being issued by |
525 | * unauthorized users. | |
c4307285 | 526 | * |
b97bf3fd PL |
527 | * Returns 0 if permission is granted, otherwise errno |
528 | */ | |
05790c64 | 529 | static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m) |
b97bf3fd PL |
530 | { |
531 | struct tipc_cfg_msg_hdr hdr; | |
532 | ||
c4307285 YH |
533 | if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES)) |
534 | return 0; | |
535 | if (likely(dest->addr.name.name.type == TIPC_TOP_SRV)) | |
536 | return 0; | |
c4307285 YH |
537 | if (likely(dest->addr.name.name.type != TIPC_CFG_SRV)) |
538 | return -EACCES; | |
b97bf3fd | 539 | |
3f8dd944 AS |
540 | if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr))) |
541 | return -EMSGSIZE; | |
c4307285 | 542 | if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr))) |
b97bf3fd | 543 | return -EFAULT; |
70cb2347 | 544 | if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN))) |
b97bf3fd | 545 | return -EACCES; |
c4307285 | 546 | |
b97bf3fd PL |
547 | return 0; |
548 | } | |
549 | ||
3f40504f YX |
550 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
551 | { | |
552 | struct sock *sk = sock->sk; | |
553 | struct tipc_port *tport = tipc_sk_port(sk); | |
554 | DEFINE_WAIT(wait); | |
555 | int done; | |
556 | ||
557 | do { | |
558 | int err = sock_error(sk); | |
559 | if (err) | |
560 | return err; | |
561 | if (sock->state == SS_DISCONNECTING) | |
562 | return -EPIPE; | |
563 | if (!*timeo_p) | |
564 | return -EAGAIN; | |
565 | if (signal_pending(current)) | |
566 | return sock_intr_errno(*timeo_p); | |
567 | ||
568 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
569 | done = sk_wait_event(sk, timeo_p, !tport->congested); | |
570 | finish_wait(sk_sleep(sk), &wait); | |
571 | } while (!done); | |
572 | return 0; | |
573 | } | |
574 | ||
b97bf3fd | 575 | /** |
247f0f3c | 576 | * tipc_sendmsg - send message in connectionless manner |
0c3141e9 | 577 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
578 | * @sock: socket structure |
579 | * @m: message to send | |
e9024f0f | 580 | * @total_len: length of message |
c4307285 | 581 | * |
b97bf3fd | 582 | * Message must have an destination specified explicitly. |
c4307285 | 583 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
584 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
585 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 586 | * |
b97bf3fd PL |
587 | * Returns the number of bytes sent on success, or errno otherwise |
588 | */ | |
247f0f3c YX |
589 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
590 | struct msghdr *m, size_t total_len) | |
b97bf3fd | 591 | { |
0c3141e9 AS |
592 | struct sock *sk = sock->sk; |
593 | struct tipc_port *tport = tipc_sk_port(sk); | |
342dfc30 | 594 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
b97bf3fd | 595 | int needs_conn; |
3f40504f | 596 | long timeo; |
b97bf3fd PL |
597 | int res = -EINVAL; |
598 | ||
599 | if (unlikely(!dest)) | |
600 | return -EDESTADDRREQ; | |
51f9cc1f AS |
601 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
602 | (dest->family != AF_TIPC))) | |
b97bf3fd | 603 | return -EINVAL; |
97f8b87e | 604 | if (total_len > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 605 | return -EMSGSIZE; |
b97bf3fd | 606 | |
0c3141e9 AS |
607 | if (iocb) |
608 | lock_sock(sk); | |
609 | ||
b97bf3fd PL |
610 | needs_conn = (sock->state != SS_READY); |
611 | if (unlikely(needs_conn)) { | |
0c3141e9 AS |
612 | if (sock->state == SS_LISTENING) { |
613 | res = -EPIPE; | |
614 | goto exit; | |
615 | } | |
616 | if (sock->state != SS_UNCONNECTED) { | |
617 | res = -EISCONN; | |
618 | goto exit; | |
619 | } | |
5d21cb70 | 620 | if (tport->published) { |
0c3141e9 AS |
621 | res = -EOPNOTSUPP; |
622 | goto exit; | |
623 | } | |
3388007b | 624 | if (dest->addrtype == TIPC_ADDR_NAME) { |
0c3141e9 AS |
625 | tport->conn_type = dest->addr.name.name.type; |
626 | tport->conn_instance = dest->addr.name.name.instance; | |
3388007b | 627 | } |
b97bf3fd PL |
628 | |
629 | /* Abort any pending connection attempts (very unlikely) */ | |
0c3141e9 | 630 | reject_rx_queue(sk); |
b97bf3fd PL |
631 | } |
632 | ||
3f40504f | 633 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
c4307285 YH |
634 | do { |
635 | if (dest->addrtype == TIPC_ADDR_NAME) { | |
2db9983a AS |
636 | res = dest_name_check(dest, m); |
637 | if (res) | |
0c3141e9 AS |
638 | break; |
639 | res = tipc_send2name(tport->ref, | |
c4307285 YH |
640 | &dest->addr.name.name, |
641 | dest->addr.name.domain, | |
26896904 AS |
642 | m->msg_iov, |
643 | total_len); | |
0e65967e | 644 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
0c3141e9 | 645 | res = tipc_send2port(tport->ref, |
c4307285 | 646 | &dest->addr.id, |
26896904 AS |
647 | m->msg_iov, |
648 | total_len); | |
0e65967e | 649 | } else if (dest->addrtype == TIPC_ADDR_MCAST) { |
b97bf3fd PL |
650 | if (needs_conn) { |
651 | res = -EOPNOTSUPP; | |
0c3141e9 | 652 | break; |
b97bf3fd | 653 | } |
2db9983a AS |
654 | res = dest_name_check(dest, m); |
655 | if (res) | |
0c3141e9 | 656 | break; |
247f0f3c YX |
657 | res = tipc_port_mcast_xmit(tport->ref, |
658 | &dest->addr.nameseq, | |
659 | m->msg_iov, | |
660 | total_len); | |
c4307285 YH |
661 | } |
662 | if (likely(res != -ELINKCONG)) { | |
a016892c | 663 | if (needs_conn && (res >= 0)) |
0c3141e9 | 664 | sock->state = SS_CONNECTING; |
0c3141e9 | 665 | break; |
c4307285 | 666 | } |
3f40504f YX |
667 | res = tipc_wait_for_sndmsg(sock, &timeo); |
668 | if (res) | |
0c3141e9 | 669 | break; |
c4307285 | 670 | } while (1); |
0c3141e9 AS |
671 | |
672 | exit: | |
673 | if (iocb) | |
674 | release_sock(sk); | |
675 | return res; | |
b97bf3fd PL |
676 | } |
677 | ||
391a6dd1 YX |
678 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
679 | { | |
680 | struct sock *sk = sock->sk; | |
681 | struct tipc_port *tport = tipc_sk_port(sk); | |
682 | DEFINE_WAIT(wait); | |
683 | int done; | |
684 | ||
685 | do { | |
686 | int err = sock_error(sk); | |
687 | if (err) | |
688 | return err; | |
689 | if (sock->state == SS_DISCONNECTING) | |
690 | return -EPIPE; | |
691 | else if (sock->state != SS_CONNECTED) | |
692 | return -ENOTCONN; | |
693 | if (!*timeo_p) | |
694 | return -EAGAIN; | |
695 | if (signal_pending(current)) | |
696 | return sock_intr_errno(*timeo_p); | |
697 | ||
698 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
699 | done = sk_wait_event(sk, timeo_p, | |
700 | (!tport->congested || !tport->connected)); | |
701 | finish_wait(sk_sleep(sk), &wait); | |
702 | } while (!done); | |
703 | return 0; | |
704 | } | |
705 | ||
c4307285 | 706 | /** |
247f0f3c | 707 | * tipc_send_packet - send a connection-oriented message |
0c3141e9 | 708 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
709 | * @sock: socket structure |
710 | * @m: message to send | |
e9024f0f | 711 | * @total_len: length of message |
c4307285 | 712 | * |
b97bf3fd | 713 | * Used for SOCK_SEQPACKET messages and SOCK_STREAM data. |
c4307285 | 714 | * |
b97bf3fd PL |
715 | * Returns the number of bytes sent on success, or errno otherwise |
716 | */ | |
247f0f3c YX |
717 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
718 | struct msghdr *m, size_t total_len) | |
b97bf3fd | 719 | { |
0c3141e9 AS |
720 | struct sock *sk = sock->sk; |
721 | struct tipc_port *tport = tipc_sk_port(sk); | |
342dfc30 | 722 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
391a6dd1 YX |
723 | int res = -EINVAL; |
724 | long timeo; | |
b97bf3fd PL |
725 | |
726 | /* Handle implied connection establishment */ | |
b97bf3fd | 727 | if (unlikely(dest)) |
247f0f3c | 728 | return tipc_sendmsg(iocb, sock, m, total_len); |
b97bf3fd | 729 | |
97f8b87e | 730 | if (total_len > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 AS |
731 | return -EMSGSIZE; |
732 | ||
0c3141e9 AS |
733 | if (iocb) |
734 | lock_sock(sk); | |
b97bf3fd | 735 | |
391a6dd1 YX |
736 | if (unlikely(sock->state != SS_CONNECTED)) { |
737 | if (sock->state == SS_DISCONNECTING) | |
738 | res = -EPIPE; | |
739 | else | |
740 | res = -ENOTCONN; | |
741 | goto exit; | |
742 | } | |
1d835874 | 743 | |
391a6dd1 | 744 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
c4307285 | 745 | do { |
9446b87a | 746 | res = tipc_send(tport->ref, m->msg_iov, total_len); |
a016892c | 747 | if (likely(res != -ELINKCONG)) |
0c3141e9 | 748 | break; |
391a6dd1 YX |
749 | res = tipc_wait_for_sndpkt(sock, &timeo); |
750 | if (res) | |
0c3141e9 | 751 | break; |
c4307285 | 752 | } while (1); |
391a6dd1 | 753 | exit: |
0c3141e9 AS |
754 | if (iocb) |
755 | release_sock(sk); | |
756 | return res; | |
b97bf3fd PL |
757 | } |
758 | ||
c4307285 | 759 | /** |
247f0f3c | 760 | * tipc_send_stream - send stream-oriented data |
b97bf3fd PL |
761 | * @iocb: (unused) |
762 | * @sock: socket structure | |
763 | * @m: data to send | |
764 | * @total_len: total length of data to be sent | |
c4307285 | 765 | * |
b97bf3fd | 766 | * Used for SOCK_STREAM data. |
c4307285 YH |
767 | * |
768 | * Returns the number of bytes sent on success (or partial success), | |
1303e8f1 | 769 | * or errno if no data sent |
b97bf3fd | 770 | */ |
247f0f3c YX |
771 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
772 | struct msghdr *m, size_t total_len) | |
b97bf3fd | 773 | { |
0c3141e9 AS |
774 | struct sock *sk = sock->sk; |
775 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
776 | struct msghdr my_msg; |
777 | struct iovec my_iov; | |
778 | struct iovec *curr_iov; | |
779 | int curr_iovlen; | |
780 | char __user *curr_start; | |
05646c91 | 781 | u32 hdr_size; |
b97bf3fd PL |
782 | int curr_left; |
783 | int bytes_to_send; | |
1303e8f1 | 784 | int bytes_sent; |
b97bf3fd | 785 | int res; |
c4307285 | 786 | |
0c3141e9 AS |
787 | lock_sock(sk); |
788 | ||
05646c91 | 789 | /* Handle special cases where there is no connection */ |
c4307285 | 790 | if (unlikely(sock->state != SS_CONNECTED)) { |
3b8401fe | 791 | if (sock->state == SS_UNCONNECTED) |
247f0f3c | 792 | res = tipc_send_packet(NULL, sock, m, total_len); |
b0555976 | 793 | else |
794 | res = sock->state == SS_DISCONNECTING ? -EPIPE : -ENOTCONN; | |
3b8401fe | 795 | goto exit; |
c4307285 | 796 | } |
b97bf3fd | 797 | |
0c3141e9 AS |
798 | if (unlikely(m->msg_name)) { |
799 | res = -EISCONN; | |
800 | goto exit; | |
801 | } | |
eb5959c2 | 802 | |
97f8b87e | 803 | if (total_len > (unsigned int)INT_MAX) { |
c29c3f70 AS |
804 | res = -EMSGSIZE; |
805 | goto exit; | |
806 | } | |
807 | ||
c4307285 | 808 | /* |
b97bf3fd PL |
809 | * Send each iovec entry using one or more messages |
810 | * | |
c4307285 | 811 | * Note: This algorithm is good for the most likely case |
b97bf3fd PL |
812 | * (i.e. one large iovec entry), but could be improved to pass sets |
813 | * of small iovec entries into send_packet(). | |
814 | */ | |
1303e8f1 AS |
815 | curr_iov = m->msg_iov; |
816 | curr_iovlen = m->msg_iovlen; | |
b97bf3fd PL |
817 | my_msg.msg_iov = &my_iov; |
818 | my_msg.msg_iovlen = 1; | |
eb5959c2 AS |
819 | my_msg.msg_flags = m->msg_flags; |
820 | my_msg.msg_name = NULL; | |
1303e8f1 | 821 | bytes_sent = 0; |
b97bf3fd | 822 | |
05646c91 AS |
823 | hdr_size = msg_hdr_sz(&tport->phdr); |
824 | ||
b97bf3fd PL |
825 | while (curr_iovlen--) { |
826 | curr_start = curr_iov->iov_base; | |
827 | curr_left = curr_iov->iov_len; | |
828 | ||
829 | while (curr_left) { | |
05646c91 AS |
830 | bytes_to_send = tport->max_pkt - hdr_size; |
831 | if (bytes_to_send > TIPC_MAX_USER_MSG_SIZE) | |
832 | bytes_to_send = TIPC_MAX_USER_MSG_SIZE; | |
833 | if (curr_left < bytes_to_send) | |
834 | bytes_to_send = curr_left; | |
b97bf3fd PL |
835 | my_iov.iov_base = curr_start; |
836 | my_iov.iov_len = bytes_to_send; | |
247f0f3c YX |
837 | res = tipc_send_packet(NULL, sock, &my_msg, |
838 | bytes_to_send); | |
2db9983a | 839 | if (res < 0) { |
0c3141e9 | 840 | if (bytes_sent) |
05646c91 | 841 | res = bytes_sent; |
0c3141e9 | 842 | goto exit; |
1303e8f1 | 843 | } |
b97bf3fd PL |
844 | curr_left -= bytes_to_send; |
845 | curr_start += bytes_to_send; | |
1303e8f1 | 846 | bytes_sent += bytes_to_send; |
b97bf3fd PL |
847 | } |
848 | ||
849 | curr_iov++; | |
850 | } | |
0c3141e9 AS |
851 | res = bytes_sent; |
852 | exit: | |
853 | release_sock(sk); | |
854 | return res; | |
b97bf3fd PL |
855 | } |
856 | ||
857 | /** | |
858 | * auto_connect - complete connection setup to a remote port | |
859 | * @sock: socket structure | |
b97bf3fd | 860 | * @msg: peer's response message |
c4307285 | 861 | * |
b97bf3fd PL |
862 | * Returns 0 on success, errno otherwise |
863 | */ | |
0c3141e9 | 864 | static int auto_connect(struct socket *sock, struct tipc_msg *msg) |
b97bf3fd | 865 | { |
8826cde6 | 866 | struct tipc_port *p_ptr = tipc_sk_port(sock->sk); |
f9fef18c JPM |
867 | struct tipc_portid peer; |
868 | ||
869 | peer.ref = msg_origport(msg); | |
870 | peer.node = msg_orignode(msg); | |
b97bf3fd | 871 | |
8826cde6 | 872 | p_ptr = tipc_port_deref(p_ptr->ref); |
584d24b3 YX |
873 | if (!p_ptr) |
874 | return -EINVAL; | |
875 | ||
f9fef18c | 876 | __tipc_port_connect(p_ptr->ref, p_ptr, &peer); |
584d24b3 YX |
877 | |
878 | if (msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE) | |
879 | return -EINVAL; | |
880 | msg_set_importance(&p_ptr->phdr, (u32)msg_importance(msg)); | |
b97bf3fd PL |
881 | sock->state = SS_CONNECTED; |
882 | return 0; | |
883 | } | |
884 | ||
885 | /** | |
886 | * set_orig_addr - capture sender's address for received message | |
887 | * @m: descriptor for message info | |
888 | * @msg: received message header | |
c4307285 | 889 | * |
b97bf3fd PL |
890 | * Note: Address is not captured if not requested by receiver. |
891 | */ | |
05790c64 | 892 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 893 | { |
342dfc30 | 894 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 895 | |
c4307285 | 896 | if (addr) { |
b97bf3fd PL |
897 | addr->family = AF_TIPC; |
898 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 899 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
900 | addr->addr.id.ref = msg_origport(msg); |
901 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
902 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
903 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
904 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
905 | } | |
906 | } | |
907 | ||
908 | /** | |
c4307285 | 909 | * anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
910 | * @m: descriptor for message info |
911 | * @msg: received message header | |
912 | * @tport: TIPC port associated with message | |
c4307285 | 913 | * |
b97bf3fd | 914 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 915 | * |
b97bf3fd PL |
916 | * Returns 0 if successful, otherwise errno |
917 | */ | |
05790c64 | 918 | static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
ae8509c4 | 919 | struct tipc_port *tport) |
b97bf3fd PL |
920 | { |
921 | u32 anc_data[3]; | |
922 | u32 err; | |
923 | u32 dest_type; | |
3546c750 | 924 | int has_name; |
b97bf3fd PL |
925 | int res; |
926 | ||
927 | if (likely(m->msg_controllen == 0)) | |
928 | return 0; | |
929 | ||
930 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
931 | err = msg ? msg_errcode(msg) : 0; |
932 | if (unlikely(err)) { | |
933 | anc_data[0] = err; | |
934 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
935 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
936 | if (res) | |
b97bf3fd | 937 | return res; |
2db9983a AS |
938 | if (anc_data[1]) { |
939 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
940 | msg_data(msg)); | |
941 | if (res) | |
942 | return res; | |
943 | } | |
b97bf3fd PL |
944 | } |
945 | ||
946 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
947 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
948 | switch (dest_type) { | |
949 | case TIPC_NAMED_MSG: | |
3546c750 | 950 | has_name = 1; |
b97bf3fd PL |
951 | anc_data[0] = msg_nametype(msg); |
952 | anc_data[1] = msg_namelower(msg); | |
953 | anc_data[2] = msg_namelower(msg); | |
954 | break; | |
955 | case TIPC_MCAST_MSG: | |
3546c750 | 956 | has_name = 1; |
b97bf3fd PL |
957 | anc_data[0] = msg_nametype(msg); |
958 | anc_data[1] = msg_namelower(msg); | |
959 | anc_data[2] = msg_nameupper(msg); | |
960 | break; | |
961 | case TIPC_CONN_MSG: | |
3546c750 | 962 | has_name = (tport->conn_type != 0); |
b97bf3fd PL |
963 | anc_data[0] = tport->conn_type; |
964 | anc_data[1] = tport->conn_instance; | |
965 | anc_data[2] = tport->conn_instance; | |
966 | break; | |
967 | default: | |
3546c750 | 968 | has_name = 0; |
b97bf3fd | 969 | } |
2db9983a AS |
970 | if (has_name) { |
971 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
972 | if (res) | |
973 | return res; | |
974 | } | |
b97bf3fd PL |
975 | |
976 | return 0; | |
977 | } | |
978 | ||
9bbb4ecc YX |
979 | static int tipc_wait_for_rcvmsg(struct socket *sock, long timeo) |
980 | { | |
981 | struct sock *sk = sock->sk; | |
982 | DEFINE_WAIT(wait); | |
983 | int err; | |
984 | ||
985 | for (;;) { | |
986 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
987 | if (skb_queue_empty(&sk->sk_receive_queue)) { | |
988 | if (sock->state == SS_DISCONNECTING) { | |
989 | err = -ENOTCONN; | |
990 | break; | |
991 | } | |
992 | release_sock(sk); | |
993 | timeo = schedule_timeout(timeo); | |
994 | lock_sock(sk); | |
995 | } | |
996 | err = 0; | |
997 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
998 | break; | |
999 | err = sock_intr_errno(timeo); | |
1000 | if (signal_pending(current)) | |
1001 | break; | |
1002 | err = -EAGAIN; | |
1003 | if (!timeo) | |
1004 | break; | |
1005 | } | |
1006 | finish_wait(sk_sleep(sk), &wait); | |
1007 | return err; | |
1008 | } | |
1009 | ||
c4307285 | 1010 | /** |
247f0f3c | 1011 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1012 | * @iocb: (unused) |
1013 | * @m: descriptor for message info | |
1014 | * @buf_len: total size of user buffer area | |
1015 | * @flags: receive flags | |
c4307285 | 1016 | * |
b97bf3fd PL |
1017 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1018 | * If the complete message doesn't fit in user area, truncate it. | |
1019 | * | |
1020 | * Returns size of returned message data, errno otherwise | |
1021 | */ | |
247f0f3c YX |
1022 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
1023 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1024 | { |
0c3141e9 AS |
1025 | struct sock *sk = sock->sk; |
1026 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
1027 | struct sk_buff *buf; |
1028 | struct tipc_msg *msg; | |
9bbb4ecc | 1029 | long timeo; |
b97bf3fd PL |
1030 | unsigned int sz; |
1031 | u32 err; | |
1032 | int res; | |
1033 | ||
0c3141e9 | 1034 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1035 | if (unlikely(!buf_len)) |
1036 | return -EINVAL; | |
1037 | ||
0c3141e9 | 1038 | lock_sock(sk); |
b97bf3fd | 1039 | |
0c3141e9 AS |
1040 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1041 | res = -ENOTCONN; | |
b97bf3fd PL |
1042 | goto exit; |
1043 | } | |
1044 | ||
9bbb4ecc | 1045 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1046 | restart: |
b97bf3fd | 1047 | |
0c3141e9 | 1048 | /* Look for a message in receive queue; wait if necessary */ |
9bbb4ecc YX |
1049 | res = tipc_wait_for_rcvmsg(sock, timeo); |
1050 | if (res) | |
1051 | goto exit; | |
b97bf3fd | 1052 | |
0c3141e9 | 1053 | /* Look at first message in receive queue */ |
0c3141e9 | 1054 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1055 | msg = buf_msg(buf); |
1056 | sz = msg_data_sz(msg); | |
1057 | err = msg_errcode(msg); | |
1058 | ||
b97bf3fd | 1059 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1060 | if ((!sz) && (!err)) { |
0c3141e9 | 1061 | advance_rx_queue(sk); |
b97bf3fd PL |
1062 | goto restart; |
1063 | } | |
1064 | ||
1065 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1066 | set_orig_addr(m, msg); |
1067 | ||
1068 | /* Capture ancillary data (optional) */ | |
0c3141e9 AS |
1069 | res = anc_data_recv(m, msg, tport); |
1070 | if (res) | |
b97bf3fd PL |
1071 | goto exit; |
1072 | ||
1073 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1074 | if (!err) { |
1075 | if (unlikely(buf_len < sz)) { | |
1076 | sz = buf_len; | |
1077 | m->msg_flags |= MSG_TRUNC; | |
1078 | } | |
0232fd0a AS |
1079 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg), |
1080 | m->msg_iov, sz); | |
1081 | if (res) | |
b97bf3fd | 1082 | goto exit; |
b97bf3fd PL |
1083 | res = sz; |
1084 | } else { | |
1085 | if ((sock->state == SS_READY) || | |
1086 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1087 | res = 0; | |
1088 | else | |
1089 | res = -ECONNRESET; | |
1090 | } | |
1091 | ||
1092 | /* Consume received message (optional) */ | |
b97bf3fd | 1093 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1094 | if ((sock->state != SS_READY) && |
0c3141e9 AS |
1095 | (++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN)) |
1096 | tipc_acknowledge(tport->ref, tport->conn_unacked); | |
1097 | advance_rx_queue(sk); | |
c4307285 | 1098 | } |
b97bf3fd | 1099 | exit: |
0c3141e9 | 1100 | release_sock(sk); |
b97bf3fd PL |
1101 | return res; |
1102 | } | |
1103 | ||
c4307285 | 1104 | /** |
247f0f3c | 1105 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1106 | * @iocb: (unused) |
1107 | * @m: descriptor for message info | |
1108 | * @buf_len: total size of user buffer area | |
1109 | * @flags: receive flags | |
c4307285 YH |
1110 | * |
1111 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1112 | * will optionally wait for more; never truncates data. |
1113 | * | |
1114 | * Returns size of returned message data, errno otherwise | |
1115 | */ | |
247f0f3c YX |
1116 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
1117 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1118 | { |
0c3141e9 AS |
1119 | struct sock *sk = sock->sk; |
1120 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
1121 | struct sk_buff *buf; |
1122 | struct tipc_msg *msg; | |
9bbb4ecc | 1123 | long timeo; |
b97bf3fd | 1124 | unsigned int sz; |
3720d40b | 1125 | int sz_to_copy, target, needed; |
b97bf3fd | 1126 | int sz_copied = 0; |
b97bf3fd | 1127 | u32 err; |
0c3141e9 | 1128 | int res = 0; |
b97bf3fd | 1129 | |
0c3141e9 | 1130 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1131 | if (unlikely(!buf_len)) |
1132 | return -EINVAL; | |
1133 | ||
0c3141e9 | 1134 | lock_sock(sk); |
b97bf3fd | 1135 | |
9bbb4ecc | 1136 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1137 | res = -ENOTCONN; |
b97bf3fd PL |
1138 | goto exit; |
1139 | } | |
1140 | ||
3720d40b | 1141 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1142 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1143 | |
617d3c7a | 1144 | restart: |
0c3141e9 | 1145 | /* Look for a message in receive queue; wait if necessary */ |
9bbb4ecc YX |
1146 | res = tipc_wait_for_rcvmsg(sock, timeo); |
1147 | if (res) | |
1148 | goto exit; | |
b97bf3fd | 1149 | |
0c3141e9 | 1150 | /* Look at first message in receive queue */ |
0c3141e9 | 1151 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1152 | msg = buf_msg(buf); |
1153 | sz = msg_data_sz(msg); | |
1154 | err = msg_errcode(msg); | |
1155 | ||
1156 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1157 | if ((!sz) && (!err)) { |
0c3141e9 | 1158 | advance_rx_queue(sk); |
b97bf3fd PL |
1159 | goto restart; |
1160 | } | |
1161 | ||
1162 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1163 | if (sz_copied == 0) { |
1164 | set_orig_addr(m, msg); | |
0c3141e9 AS |
1165 | res = anc_data_recv(m, msg, tport); |
1166 | if (res) | |
b97bf3fd PL |
1167 | goto exit; |
1168 | } | |
1169 | ||
1170 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1171 | if (!err) { |
0232fd0a | 1172 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1173 | |
0232fd0a | 1174 | sz -= offset; |
b97bf3fd PL |
1175 | needed = (buf_len - sz_copied); |
1176 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a AS |
1177 | |
1178 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset, | |
1179 | m->msg_iov, sz_to_copy); | |
1180 | if (res) | |
b97bf3fd | 1181 | goto exit; |
0232fd0a | 1182 | |
b97bf3fd PL |
1183 | sz_copied += sz_to_copy; |
1184 | ||
1185 | if (sz_to_copy < sz) { | |
1186 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1187 | TIPC_SKB_CB(buf)->handle = |
1188 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1189 | goto exit; |
1190 | } | |
b97bf3fd PL |
1191 | } else { |
1192 | if (sz_copied != 0) | |
1193 | goto exit; /* can't add error msg to valid data */ | |
1194 | ||
1195 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1196 | res = 0; | |
1197 | else | |
1198 | res = -ECONNRESET; | |
1199 | } | |
1200 | ||
1201 | /* Consume received message (optional) */ | |
b97bf3fd | 1202 | if (likely(!(flags & MSG_PEEK))) { |
0c3141e9 AS |
1203 | if (unlikely(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN)) |
1204 | tipc_acknowledge(tport->ref, tport->conn_unacked); | |
1205 | advance_rx_queue(sk); | |
c4307285 | 1206 | } |
b97bf3fd PL |
1207 | |
1208 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1209 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1210 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1211 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1212 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1213 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1214 | goto restart; |
1215 | ||
1216 | exit: | |
0c3141e9 | 1217 | release_sock(sk); |
a3b0a5a9 | 1218 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1219 | } |
1220 | ||
f288bef4 YX |
1221 | /** |
1222 | * tipc_write_space - wake up thread if port congestion is released | |
1223 | * @sk: socket | |
1224 | */ | |
1225 | static void tipc_write_space(struct sock *sk) | |
1226 | { | |
1227 | struct socket_wq *wq; | |
1228 | ||
1229 | rcu_read_lock(); | |
1230 | wq = rcu_dereference(sk->sk_wq); | |
1231 | if (wq_has_sleeper(wq)) | |
1232 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1233 | POLLWRNORM | POLLWRBAND); | |
1234 | rcu_read_unlock(); | |
1235 | } | |
1236 | ||
1237 | /** | |
1238 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1239 | * @sk: socket | |
1240 | * @len: the length of messages | |
1241 | */ | |
1242 | static void tipc_data_ready(struct sock *sk, int len) | |
1243 | { | |
1244 | struct socket_wq *wq; | |
1245 | ||
1246 | rcu_read_lock(); | |
1247 | wq = rcu_dereference(sk->sk_wq); | |
1248 | if (wq_has_sleeper(wq)) | |
1249 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1250 | POLLRDNORM | POLLRDBAND); | |
1251 | rcu_read_unlock(); | |
1252 | } | |
1253 | ||
7e6c131e YX |
1254 | /** |
1255 | * filter_connect - Handle all incoming messages for a connection-based socket | |
8826cde6 | 1256 | * @port: TIPC port |
7e6c131e YX |
1257 | * @msg: message |
1258 | * | |
1259 | * Returns TIPC error status code and socket error status code | |
1260 | * once it encounters some errors | |
1261 | */ | |
8826cde6 | 1262 | static u32 filter_connect(struct tipc_port *port, struct sk_buff **buf) |
7e6c131e | 1263 | { |
8826cde6 JPM |
1264 | struct sock *sk = tipc_port_to_sk(port); |
1265 | struct socket *sock = sk->sk_socket; | |
7e6c131e | 1266 | struct tipc_msg *msg = buf_msg(*buf); |
8826cde6 | 1267 | |
7e6c131e | 1268 | u32 retval = TIPC_ERR_NO_PORT; |
584d24b3 | 1269 | int res; |
7e6c131e YX |
1270 | |
1271 | if (msg_mcast(msg)) | |
1272 | return retval; | |
1273 | ||
1274 | switch ((int)sock->state) { | |
1275 | case SS_CONNECTED: | |
1276 | /* Accept only connection-based messages sent by peer */ | |
8826cde6 | 1277 | if (msg_connected(msg) && tipc_port_peer_msg(port, msg)) { |
7e6c131e YX |
1278 | if (unlikely(msg_errcode(msg))) { |
1279 | sock->state = SS_DISCONNECTING; | |
8826cde6 | 1280 | __tipc_port_disconnect(port); |
7e6c131e YX |
1281 | } |
1282 | retval = TIPC_OK; | |
1283 | } | |
1284 | break; | |
1285 | case SS_CONNECTING: | |
1286 | /* Accept only ACK or NACK message */ | |
584d24b3 YX |
1287 | if (unlikely(msg_errcode(msg))) { |
1288 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1289 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1290 | retval = TIPC_OK; |
1291 | break; | |
1292 | } | |
1293 | ||
1294 | if (unlikely(!msg_connected(msg))) | |
1295 | break; | |
1296 | ||
1297 | res = auto_connect(sock, msg); | |
1298 | if (res) { | |
1299 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1300 | sk->sk_err = -res; |
7e6c131e | 1301 | retval = TIPC_OK; |
584d24b3 YX |
1302 | break; |
1303 | } | |
1304 | ||
1305 | /* If an incoming message is an 'ACK-', it should be | |
1306 | * discarded here because it doesn't contain useful | |
1307 | * data. In addition, we should try to wake up | |
1308 | * connect() routine if sleeping. | |
1309 | */ | |
1310 | if (msg_data_sz(msg) == 0) { | |
1311 | kfree_skb(*buf); | |
1312 | *buf = NULL; | |
1313 | if (waitqueue_active(sk_sleep(sk))) | |
1314 | wake_up_interruptible(sk_sleep(sk)); | |
1315 | } | |
1316 | retval = TIPC_OK; | |
7e6c131e YX |
1317 | break; |
1318 | case SS_LISTENING: | |
1319 | case SS_UNCONNECTED: | |
1320 | /* Accept only SYN message */ | |
1321 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1322 | retval = TIPC_OK; | |
1323 | break; | |
1324 | case SS_DISCONNECTING: | |
1325 | break; | |
1326 | default: | |
1327 | pr_err("Unknown socket state %u\n", sock->state); | |
1328 | } | |
1329 | return retval; | |
1330 | } | |
1331 | ||
aba79f33 YX |
1332 | /** |
1333 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1334 | * @sk: socket | |
1335 | * @buf: message | |
1336 | * | |
1337 | * For all connection oriented messages, irrespective of importance, | |
1338 | * the default overload value (i.e. 67MB) is set as limit. | |
1339 | * | |
1340 | * For all connectionless messages, by default new queue limits are | |
1341 | * as belows: | |
1342 | * | |
cc79dd1b YX |
1343 | * TIPC_LOW_IMPORTANCE (4 MB) |
1344 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1345 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1346 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1347 | * |
1348 | * Returns overload limit according to corresponding message importance | |
1349 | */ | |
1350 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1351 | { | |
1352 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1353 | |
1354 | if (msg_connected(msg)) | |
0cee6bbe | 1355 | return sysctl_tipc_rmem[2]; |
1356 | ||
1357 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1358 | msg_importance(msg); | |
aba79f33 YX |
1359 | } |
1360 | ||
c4307285 | 1361 | /** |
0c3141e9 AS |
1362 | * filter_rcv - validate incoming message |
1363 | * @sk: socket | |
b97bf3fd | 1364 | * @buf: message |
c4307285 | 1365 | * |
0c3141e9 AS |
1366 | * Enqueues message on receive queue if acceptable; optionally handles |
1367 | * disconnect indication for a connected socket. | |
1368 | * | |
1369 | * Called with socket lock already taken; port lock may also be taken. | |
c4307285 | 1370 | * |
b97bf3fd PL |
1371 | * Returns TIPC error status code (TIPC_OK if message is not to be rejected) |
1372 | */ | |
0c3141e9 | 1373 | static u32 filter_rcv(struct sock *sk, struct sk_buff *buf) |
b97bf3fd | 1374 | { |
0c3141e9 | 1375 | struct socket *sock = sk->sk_socket; |
b97bf3fd | 1376 | struct tipc_msg *msg = buf_msg(buf); |
aba79f33 | 1377 | unsigned int limit = rcvbuf_limit(sk, buf); |
7e6c131e | 1378 | u32 res = TIPC_OK; |
b97bf3fd | 1379 | |
b97bf3fd | 1380 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 AS |
1381 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
1382 | return TIPC_ERR_NO_PORT; | |
0c3141e9 | 1383 | |
b97bf3fd | 1384 | if (sock->state == SS_READY) { |
b29f1428 | 1385 | if (msg_connected(msg)) |
b97bf3fd | 1386 | return TIPC_ERR_NO_PORT; |
b97bf3fd | 1387 | } else { |
8826cde6 | 1388 | res = filter_connect(tipc_sk_port(sk), &buf); |
7e6c131e YX |
1389 | if (res != TIPC_OK || buf == NULL) |
1390 | return res; | |
b97bf3fd PL |
1391 | } |
1392 | ||
1393 | /* Reject message if there isn't room to queue it */ | |
aba79f33 YX |
1394 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
1395 | return TIPC_ERR_OVERLOAD; | |
b97bf3fd | 1396 | |
aba79f33 | 1397 | /* Enqueue message */ |
40682432 | 1398 | TIPC_SKB_CB(buf)->handle = NULL; |
0c3141e9 | 1399 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
aba79f33 | 1400 | skb_set_owner_r(buf, sk); |
0c3141e9 | 1401 | |
f288bef4 | 1402 | sk->sk_data_ready(sk, 0); |
0c3141e9 AS |
1403 | return TIPC_OK; |
1404 | } | |
b97bf3fd | 1405 | |
0c3141e9 AS |
1406 | /** |
1407 | * backlog_rcv - handle incoming message from backlog queue | |
1408 | * @sk: socket | |
1409 | * @buf: message | |
1410 | * | |
1411 | * Caller must hold socket lock, but not port lock. | |
1412 | * | |
1413 | * Returns 0 | |
1414 | */ | |
0c3141e9 AS |
1415 | static int backlog_rcv(struct sock *sk, struct sk_buff *buf) |
1416 | { | |
1417 | u32 res; | |
1418 | ||
1419 | res = filter_rcv(sk, buf); | |
1420 | if (res) | |
1421 | tipc_reject_msg(buf, res); | |
1422 | return 0; | |
1423 | } | |
1424 | ||
1425 | /** | |
24be34b5 JPM |
1426 | * tipc_sk_rcv - handle incoming message |
1427 | * @sk: socket receiving message | |
0c3141e9 AS |
1428 | * @buf: message |
1429 | * | |
1430 | * Called with port lock already taken. | |
1431 | * | |
1432 | * Returns TIPC error status code (TIPC_OK if message is not to be rejected) | |
1433 | */ | |
24be34b5 | 1434 | u32 tipc_sk_rcv(struct sock *sk, struct sk_buff *buf) |
0c3141e9 | 1435 | { |
0c3141e9 AS |
1436 | u32 res; |
1437 | ||
1438 | /* | |
1439 | * Process message if socket is unlocked; otherwise add to backlog queue | |
1440 | * | |
1441 | * This code is based on sk_receive_skb(), but must be distinct from it | |
1442 | * since a TIPC-specific filter/reject mechanism is utilized | |
1443 | */ | |
0c3141e9 AS |
1444 | bh_lock_sock(sk); |
1445 | if (!sock_owned_by_user(sk)) { | |
1446 | res = filter_rcv(sk, buf); | |
1447 | } else { | |
aba79f33 | 1448 | if (sk_add_backlog(sk, buf, rcvbuf_limit(sk, buf))) |
53eecb1b ZY |
1449 | res = TIPC_ERR_OVERLOAD; |
1450 | else | |
1451 | res = TIPC_OK; | |
0c3141e9 AS |
1452 | } |
1453 | bh_unlock_sock(sk); | |
1454 | ||
1455 | return res; | |
b97bf3fd PL |
1456 | } |
1457 | ||
78eb3a53 YX |
1458 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1459 | { | |
1460 | struct sock *sk = sock->sk; | |
1461 | DEFINE_WAIT(wait); | |
1462 | int done; | |
1463 | ||
1464 | do { | |
1465 | int err = sock_error(sk); | |
1466 | if (err) | |
1467 | return err; | |
1468 | if (!*timeo_p) | |
1469 | return -ETIMEDOUT; | |
1470 | if (signal_pending(current)) | |
1471 | return sock_intr_errno(*timeo_p); | |
1472 | ||
1473 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1474 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1475 | finish_wait(sk_sleep(sk), &wait); | |
1476 | } while (!done); | |
1477 | return 0; | |
1478 | } | |
1479 | ||
b97bf3fd | 1480 | /** |
247f0f3c | 1481 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1482 | * @sock: socket structure |
1483 | * @dest: socket address for destination port | |
1484 | * @destlen: size of socket address data structure | |
0c3141e9 | 1485 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1486 | * |
1487 | * Returns 0 on success, errno otherwise | |
1488 | */ | |
247f0f3c YX |
1489 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1490 | int destlen, int flags) | |
b97bf3fd | 1491 | { |
0c3141e9 | 1492 | struct sock *sk = sock->sk; |
b89741a0 AS |
1493 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1494 | struct msghdr m = {NULL,}; | |
78eb3a53 YX |
1495 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
1496 | socket_state previous; | |
b89741a0 AS |
1497 | int res; |
1498 | ||
0c3141e9 AS |
1499 | lock_sock(sk); |
1500 | ||
b89741a0 | 1501 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
0c3141e9 AS |
1502 | if (sock->state == SS_READY) { |
1503 | res = -EOPNOTSUPP; | |
1504 | goto exit; | |
1505 | } | |
b89741a0 | 1506 | |
b89741a0 AS |
1507 | /* |
1508 | * Reject connection attempt using multicast address | |
1509 | * | |
1510 | * Note: send_msg() validates the rest of the address fields, | |
1511 | * so there's no need to do it here | |
1512 | */ | |
0c3141e9 AS |
1513 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1514 | res = -EINVAL; | |
1515 | goto exit; | |
1516 | } | |
1517 | ||
78eb3a53 | 1518 | previous = sock->state; |
584d24b3 YX |
1519 | switch (sock->state) { |
1520 | case SS_UNCONNECTED: | |
1521 | /* Send a 'SYN-' to destination */ | |
1522 | m.msg_name = dest; | |
1523 | m.msg_namelen = destlen; | |
1524 | ||
1525 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1526 | * indicate send_msg() is never blocked. | |
1527 | */ | |
1528 | if (!timeout) | |
1529 | m.msg_flags = MSG_DONTWAIT; | |
1530 | ||
247f0f3c | 1531 | res = tipc_sendmsg(NULL, sock, &m, 0); |
584d24b3 YX |
1532 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1533 | goto exit; | |
1534 | ||
1535 | /* Just entered SS_CONNECTING state; the only | |
1536 | * difference is that return value in non-blocking | |
1537 | * case is EINPROGRESS, rather than EALREADY. | |
1538 | */ | |
1539 | res = -EINPROGRESS; | |
584d24b3 | 1540 | case SS_CONNECTING: |
78eb3a53 YX |
1541 | if (previous == SS_CONNECTING) |
1542 | res = -EALREADY; | |
1543 | if (!timeout) | |
1544 | goto exit; | |
1545 | timeout = msecs_to_jiffies(timeout); | |
1546 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1547 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1548 | break; |
1549 | case SS_CONNECTED: | |
1550 | res = -EISCONN; | |
1551 | break; | |
1552 | default: | |
1553 | res = -EINVAL; | |
78eb3a53 | 1554 | break; |
b89741a0 | 1555 | } |
0c3141e9 AS |
1556 | exit: |
1557 | release_sock(sk); | |
b89741a0 | 1558 | return res; |
b97bf3fd PL |
1559 | } |
1560 | ||
c4307285 | 1561 | /** |
247f0f3c | 1562 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1563 | * @sock: socket structure |
1564 | * @len: (unused) | |
c4307285 | 1565 | * |
b97bf3fd PL |
1566 | * Returns 0 on success, errno otherwise |
1567 | */ | |
247f0f3c | 1568 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1569 | { |
0c3141e9 AS |
1570 | struct sock *sk = sock->sk; |
1571 | int res; | |
1572 | ||
1573 | lock_sock(sk); | |
b97bf3fd | 1574 | |
245f3d34 | 1575 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1576 | res = -EINVAL; |
1577 | else { | |
1578 | sock->state = SS_LISTENING; | |
1579 | res = 0; | |
1580 | } | |
1581 | ||
1582 | release_sock(sk); | |
1583 | return res; | |
b97bf3fd PL |
1584 | } |
1585 | ||
6398e23c YX |
1586 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1587 | { | |
1588 | struct sock *sk = sock->sk; | |
1589 | DEFINE_WAIT(wait); | |
1590 | int err; | |
1591 | ||
1592 | /* True wake-one mechanism for incoming connections: only | |
1593 | * one process gets woken up, not the 'whole herd'. | |
1594 | * Since we do not 'race & poll' for established sockets | |
1595 | * anymore, the common case will execute the loop only once. | |
1596 | */ | |
1597 | for (;;) { | |
1598 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1599 | TASK_INTERRUPTIBLE); | |
1600 | if (skb_queue_empty(&sk->sk_receive_queue)) { | |
1601 | release_sock(sk); | |
1602 | timeo = schedule_timeout(timeo); | |
1603 | lock_sock(sk); | |
1604 | } | |
1605 | err = 0; | |
1606 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1607 | break; | |
1608 | err = -EINVAL; | |
1609 | if (sock->state != SS_LISTENING) | |
1610 | break; | |
1611 | err = sock_intr_errno(timeo); | |
1612 | if (signal_pending(current)) | |
1613 | break; | |
1614 | err = -EAGAIN; | |
1615 | if (!timeo) | |
1616 | break; | |
1617 | } | |
1618 | finish_wait(sk_sleep(sk), &wait); | |
1619 | return err; | |
1620 | } | |
1621 | ||
c4307285 | 1622 | /** |
247f0f3c | 1623 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1624 | * @sock: listening socket |
1625 | * @newsock: new socket that is to be connected | |
1626 | * @flags: file-related flags associated with socket | |
c4307285 | 1627 | * |
b97bf3fd PL |
1628 | * Returns 0 on success, errno otherwise |
1629 | */ | |
247f0f3c | 1630 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1631 | { |
0fef8f20 | 1632 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1633 | struct sk_buff *buf; |
8826cde6 | 1634 | struct tipc_port *new_port; |
0fef8f20 | 1635 | struct tipc_msg *msg; |
f9fef18c | 1636 | struct tipc_portid peer; |
0fef8f20 | 1637 | u32 new_ref; |
6398e23c | 1638 | long timeo; |
0c3141e9 | 1639 | int res; |
b97bf3fd | 1640 | |
0c3141e9 | 1641 | lock_sock(sk); |
b97bf3fd | 1642 | |
0c3141e9 AS |
1643 | if (sock->state != SS_LISTENING) { |
1644 | res = -EINVAL; | |
b97bf3fd PL |
1645 | goto exit; |
1646 | } | |
6398e23c YX |
1647 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1648 | res = tipc_wait_for_accept(sock, timeo); | |
1649 | if (res) | |
1650 | goto exit; | |
0c3141e9 AS |
1651 | |
1652 | buf = skb_peek(&sk->sk_receive_queue); | |
1653 | ||
c5fa7b3c | 1654 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
1655 | if (res) |
1656 | goto exit; | |
b97bf3fd | 1657 | |
0fef8f20 | 1658 | new_sk = new_sock->sk; |
8826cde6 JPM |
1659 | new_port = tipc_sk_port(new_sk); |
1660 | new_ref = new_port->ref; | |
0fef8f20 | 1661 | msg = buf_msg(buf); |
b97bf3fd | 1662 | |
0fef8f20 PG |
1663 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
1664 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
1665 | ||
1666 | /* | |
1667 | * Reject any stray messages received by new socket | |
1668 | * before the socket lock was taken (very, very unlikely) | |
1669 | */ | |
1670 | reject_rx_queue(new_sk); | |
1671 | ||
1672 | /* Connect new socket to it's peer */ | |
f9fef18c JPM |
1673 | peer.ref = msg_origport(msg); |
1674 | peer.node = msg_orignode(msg); | |
1675 | tipc_port_connect(new_ref, &peer); | |
0fef8f20 PG |
1676 | new_sock->state = SS_CONNECTED; |
1677 | ||
3b4f302d | 1678 | tipc_port_set_importance(new_port, msg_importance(msg)); |
0fef8f20 | 1679 | if (msg_named(msg)) { |
8826cde6 JPM |
1680 | new_port->conn_type = msg_nametype(msg); |
1681 | new_port->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 1682 | } |
0fef8f20 PG |
1683 | |
1684 | /* | |
1685 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
1686 | * Respond to 'SYN+' by queuing it on new socket. | |
1687 | */ | |
1688 | if (!msg_data_sz(msg)) { | |
1689 | struct msghdr m = {NULL,}; | |
1690 | ||
1691 | advance_rx_queue(sk); | |
247f0f3c | 1692 | tipc_send_packet(NULL, new_sock, &m, 0); |
0fef8f20 PG |
1693 | } else { |
1694 | __skb_dequeue(&sk->sk_receive_queue); | |
1695 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 1696 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
1697 | } |
1698 | release_sock(new_sk); | |
b97bf3fd | 1699 | exit: |
0c3141e9 | 1700 | release_sock(sk); |
b97bf3fd PL |
1701 | return res; |
1702 | } | |
1703 | ||
1704 | /** | |
247f0f3c | 1705 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 1706 | * @sock: socket structure |
e247a8f5 | 1707 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
1708 | * |
1709 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 1710 | * |
b97bf3fd PL |
1711 | * Returns 0 on success, errno otherwise |
1712 | */ | |
247f0f3c | 1713 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 1714 | { |
0c3141e9 AS |
1715 | struct sock *sk = sock->sk; |
1716 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
1717 | struct sk_buff *buf; |
1718 | int res; | |
1719 | ||
e247a8f5 AS |
1720 | if (how != SHUT_RDWR) |
1721 | return -EINVAL; | |
b97bf3fd | 1722 | |
0c3141e9 | 1723 | lock_sock(sk); |
b97bf3fd PL |
1724 | |
1725 | switch (sock->state) { | |
0c3141e9 | 1726 | case SS_CONNECTING: |
b97bf3fd PL |
1727 | case SS_CONNECTED: |
1728 | ||
b97bf3fd | 1729 | restart: |
617d3c7a | 1730 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
0c3141e9 AS |
1731 | buf = __skb_dequeue(&sk->sk_receive_queue); |
1732 | if (buf) { | |
40682432 | 1733 | if (TIPC_SKB_CB(buf)->handle != NULL) { |
5f6d9123 | 1734 | kfree_skb(buf); |
b97bf3fd PL |
1735 | goto restart; |
1736 | } | |
247f0f3c | 1737 | tipc_port_disconnect(tport->ref); |
b97bf3fd | 1738 | tipc_reject_msg(buf, TIPC_CONN_SHUTDOWN); |
0c3141e9 | 1739 | } else { |
247f0f3c | 1740 | tipc_port_shutdown(tport->ref); |
b97bf3fd | 1741 | } |
0c3141e9 AS |
1742 | |
1743 | sock->state = SS_DISCONNECTING; | |
b97bf3fd PL |
1744 | |
1745 | /* fall through */ | |
1746 | ||
1747 | case SS_DISCONNECTING: | |
1748 | ||
75031151 | 1749 | /* Discard any unreceived messages */ |
57467e56 | 1750 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
1751 | |
1752 | /* Wake up anyone sleeping in poll */ | |
1753 | sk->sk_state_change(sk); | |
b97bf3fd PL |
1754 | res = 0; |
1755 | break; | |
1756 | ||
1757 | default: | |
1758 | res = -ENOTCONN; | |
1759 | } | |
1760 | ||
0c3141e9 | 1761 | release_sock(sk); |
b97bf3fd PL |
1762 | return res; |
1763 | } | |
1764 | ||
1765 | /** | |
247f0f3c | 1766 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
1767 | * @sock: socket structure |
1768 | * @lvl: option level | |
1769 | * @opt: option identifier | |
1770 | * @ov: pointer to new option value | |
1771 | * @ol: length of option value | |
c4307285 YH |
1772 | * |
1773 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 1774 | * (to ease compatibility). |
c4307285 | 1775 | * |
b97bf3fd PL |
1776 | * Returns 0 on success, errno otherwise |
1777 | */ | |
247f0f3c YX |
1778 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
1779 | char __user *ov, unsigned int ol) | |
b97bf3fd | 1780 | { |
0c3141e9 AS |
1781 | struct sock *sk = sock->sk; |
1782 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
1783 | u32 value; |
1784 | int res; | |
1785 | ||
c4307285 YH |
1786 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
1787 | return 0; | |
b97bf3fd PL |
1788 | if (lvl != SOL_TIPC) |
1789 | return -ENOPROTOOPT; | |
1790 | if (ol < sizeof(value)) | |
1791 | return -EINVAL; | |
2db9983a AS |
1792 | res = get_user(value, (u32 __user *)ov); |
1793 | if (res) | |
b97bf3fd PL |
1794 | return res; |
1795 | ||
0c3141e9 | 1796 | lock_sock(sk); |
c4307285 | 1797 | |
b97bf3fd PL |
1798 | switch (opt) { |
1799 | case TIPC_IMPORTANCE: | |
3b4f302d | 1800 | tipc_port_set_importance(tport, value); |
b97bf3fd PL |
1801 | break; |
1802 | case TIPC_SRC_DROPPABLE: | |
1803 | if (sock->type != SOCK_STREAM) | |
3b4f302d | 1804 | tipc_port_set_unreliable(tport, value); |
c4307285 | 1805 | else |
b97bf3fd PL |
1806 | res = -ENOPROTOOPT; |
1807 | break; | |
1808 | case TIPC_DEST_DROPPABLE: | |
3b4f302d | 1809 | tipc_port_set_unreturnable(tport, value); |
b97bf3fd PL |
1810 | break; |
1811 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 1812 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 1813 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
1814 | break; |
1815 | default: | |
1816 | res = -EINVAL; | |
1817 | } | |
1818 | ||
0c3141e9 AS |
1819 | release_sock(sk); |
1820 | ||
b97bf3fd PL |
1821 | return res; |
1822 | } | |
1823 | ||
1824 | /** | |
247f0f3c | 1825 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
1826 | * @sock: socket structure |
1827 | * @lvl: option level | |
1828 | * @opt: option identifier | |
1829 | * @ov: receptacle for option value | |
1830 | * @ol: receptacle for length of option value | |
c4307285 YH |
1831 | * |
1832 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 1833 | * (to ease compatibility). |
c4307285 | 1834 | * |
b97bf3fd PL |
1835 | * Returns 0 on success, errno otherwise |
1836 | */ | |
247f0f3c YX |
1837 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
1838 | char __user *ov, int __user *ol) | |
b97bf3fd | 1839 | { |
0c3141e9 AS |
1840 | struct sock *sk = sock->sk; |
1841 | struct tipc_port *tport = tipc_sk_port(sk); | |
c4307285 | 1842 | int len; |
b97bf3fd | 1843 | u32 value; |
c4307285 | 1844 | int res; |
b97bf3fd | 1845 | |
c4307285 YH |
1846 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
1847 | return put_user(0, ol); | |
b97bf3fd PL |
1848 | if (lvl != SOL_TIPC) |
1849 | return -ENOPROTOOPT; | |
2db9983a AS |
1850 | res = get_user(len, ol); |
1851 | if (res) | |
c4307285 | 1852 | return res; |
b97bf3fd | 1853 | |
0c3141e9 | 1854 | lock_sock(sk); |
b97bf3fd PL |
1855 | |
1856 | switch (opt) { | |
1857 | case TIPC_IMPORTANCE: | |
3b4f302d | 1858 | value = tipc_port_importance(tport); |
b97bf3fd PL |
1859 | break; |
1860 | case TIPC_SRC_DROPPABLE: | |
3b4f302d | 1861 | value = tipc_port_unreliable(tport); |
b97bf3fd PL |
1862 | break; |
1863 | case TIPC_DEST_DROPPABLE: | |
3b4f302d | 1864 | value = tipc_port_unreturnable(tport); |
b97bf3fd PL |
1865 | break; |
1866 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 1867 | value = tipc_sk(sk)->conn_timeout; |
0c3141e9 | 1868 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 1869 | break; |
0e65967e | 1870 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 1871 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 1872 | break; |
0e65967e | 1873 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 1874 | value = skb_queue_len(&sk->sk_receive_queue); |
1875 | break; | |
b97bf3fd PL |
1876 | default: |
1877 | res = -EINVAL; | |
1878 | } | |
1879 | ||
0c3141e9 AS |
1880 | release_sock(sk); |
1881 | ||
25860c3b PG |
1882 | if (res) |
1883 | return res; /* "get" failed */ | |
b97bf3fd | 1884 | |
25860c3b PG |
1885 | if (len < sizeof(value)) |
1886 | return -EINVAL; | |
1887 | ||
1888 | if (copy_to_user(ov, &value, sizeof(value))) | |
1889 | return -EFAULT; | |
1890 | ||
1891 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
1892 | } |
1893 | ||
ae86b9e3 BH |
1894 | /* Protocol switches for the various types of TIPC sockets */ |
1895 | ||
bca65eae | 1896 | static const struct proto_ops msg_ops = { |
0e65967e | 1897 | .owner = THIS_MODULE, |
b97bf3fd | 1898 | .family = AF_TIPC, |
247f0f3c YX |
1899 | .release = tipc_release, |
1900 | .bind = tipc_bind, | |
1901 | .connect = tipc_connect, | |
5eee6a6d | 1902 | .socketpair = sock_no_socketpair, |
245f3d34 | 1903 | .accept = sock_no_accept, |
247f0f3c YX |
1904 | .getname = tipc_getname, |
1905 | .poll = tipc_poll, | |
5eee6a6d | 1906 | .ioctl = sock_no_ioctl, |
245f3d34 | 1907 | .listen = sock_no_listen, |
247f0f3c YX |
1908 | .shutdown = tipc_shutdown, |
1909 | .setsockopt = tipc_setsockopt, | |
1910 | .getsockopt = tipc_getsockopt, | |
1911 | .sendmsg = tipc_sendmsg, | |
1912 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
1913 | .mmap = sock_no_mmap, |
1914 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
1915 | }; |
1916 | ||
bca65eae | 1917 | static const struct proto_ops packet_ops = { |
0e65967e | 1918 | .owner = THIS_MODULE, |
b97bf3fd | 1919 | .family = AF_TIPC, |
247f0f3c YX |
1920 | .release = tipc_release, |
1921 | .bind = tipc_bind, | |
1922 | .connect = tipc_connect, | |
5eee6a6d | 1923 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
1924 | .accept = tipc_accept, |
1925 | .getname = tipc_getname, | |
1926 | .poll = tipc_poll, | |
5eee6a6d | 1927 | .ioctl = sock_no_ioctl, |
247f0f3c YX |
1928 | .listen = tipc_listen, |
1929 | .shutdown = tipc_shutdown, | |
1930 | .setsockopt = tipc_setsockopt, | |
1931 | .getsockopt = tipc_getsockopt, | |
1932 | .sendmsg = tipc_send_packet, | |
1933 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
1934 | .mmap = sock_no_mmap, |
1935 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
1936 | }; |
1937 | ||
bca65eae | 1938 | static const struct proto_ops stream_ops = { |
0e65967e | 1939 | .owner = THIS_MODULE, |
b97bf3fd | 1940 | .family = AF_TIPC, |
247f0f3c YX |
1941 | .release = tipc_release, |
1942 | .bind = tipc_bind, | |
1943 | .connect = tipc_connect, | |
5eee6a6d | 1944 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
1945 | .accept = tipc_accept, |
1946 | .getname = tipc_getname, | |
1947 | .poll = tipc_poll, | |
5eee6a6d | 1948 | .ioctl = sock_no_ioctl, |
247f0f3c YX |
1949 | .listen = tipc_listen, |
1950 | .shutdown = tipc_shutdown, | |
1951 | .setsockopt = tipc_setsockopt, | |
1952 | .getsockopt = tipc_getsockopt, | |
1953 | .sendmsg = tipc_send_stream, | |
1954 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
1955 | .mmap = sock_no_mmap, |
1956 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
1957 | }; |
1958 | ||
bca65eae | 1959 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 1960 | .owner = THIS_MODULE, |
b97bf3fd | 1961 | .family = AF_TIPC, |
c5fa7b3c | 1962 | .create = tipc_sk_create |
b97bf3fd PL |
1963 | }; |
1964 | ||
1965 | static struct proto tipc_proto = { | |
1966 | .name = "TIPC", | |
1967 | .owner = THIS_MODULE, | |
cc79dd1b YX |
1968 | .obj_size = sizeof(struct tipc_sock), |
1969 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
1970 | }; |
1971 | ||
c5fa7b3c YX |
1972 | static struct proto tipc_proto_kern = { |
1973 | .name = "TIPC", | |
1974 | .obj_size = sizeof(struct tipc_sock), | |
1975 | .sysctl_rmem = sysctl_tipc_rmem | |
1976 | }; | |
1977 | ||
b97bf3fd | 1978 | /** |
4323add6 | 1979 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 1980 | * |
b97bf3fd PL |
1981 | * Returns 0 on success, errno otherwise |
1982 | */ | |
4323add6 | 1983 | int tipc_socket_init(void) |
b97bf3fd PL |
1984 | { |
1985 | int res; | |
1986 | ||
c4307285 | 1987 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 1988 | if (res) { |
2cf8aa19 | 1989 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
1990 | goto out; |
1991 | } | |
1992 | ||
1993 | res = sock_register(&tipc_family_ops); | |
1994 | if (res) { | |
2cf8aa19 | 1995 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
1996 | proto_unregister(&tipc_proto); |
1997 | goto out; | |
1998 | } | |
b97bf3fd PL |
1999 | out: |
2000 | return res; | |
2001 | } | |
2002 | ||
2003 | /** | |
4323add6 | 2004 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2005 | */ |
4323add6 | 2006 | void tipc_socket_stop(void) |
b97bf3fd | 2007 | { |
b97bf3fd PL |
2008 | sock_unregister(tipc_family_ops.family); |
2009 | proto_unregister(&tipc_proto); | |
2010 | } |