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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 | |
b97bf3fd | 47 | |
0c3141e9 | 48 | static int backlog_rcv(struct sock *sk, struct sk_buff *skb); |
b97bf3fd PL |
49 | static u32 dispatch(struct tipc_port *tport, struct sk_buff *buf); |
50 | static void wakeupdispatch(struct tipc_port *tport); | |
f288bef4 YX |
51 | static void tipc_data_ready(struct sock *sk, int len); |
52 | static void tipc_write_space(struct sock *sk); | |
247f0f3c YX |
53 | static int tipc_release(struct socket *sock); |
54 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
b97bf3fd | 55 | |
bca65eae FW |
56 | static const struct proto_ops packet_ops; |
57 | static const struct proto_ops stream_ops; | |
58 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
59 | |
60 | static struct proto tipc_proto; | |
c5fa7b3c | 61 | static struct proto tipc_proto_kern; |
b97bf3fd | 62 | |
c4307285 | 63 | /* |
0c3141e9 AS |
64 | * Revised TIPC socket locking policy: |
65 | * | |
66 | * Most socket operations take the standard socket lock when they start | |
67 | * and hold it until they finish (or until they need to sleep). Acquiring | |
68 | * this lock grants the owner exclusive access to the fields of the socket | |
69 | * data structures, with the exception of the backlog queue. A few socket | |
70 | * operations can be done without taking the socket lock because they only | |
71 | * read socket information that never changes during the life of the socket. | |
72 | * | |
73 | * Socket operations may acquire the lock for the associated TIPC port if they | |
74 | * need to perform an operation on the port. If any routine needs to acquire | |
75 | * both the socket lock and the port lock it must take the socket lock first | |
76 | * to avoid the risk of deadlock. | |
77 | * | |
78 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
79 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
80 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
81 | * and either handles the message itself or adds it to the socket's backlog | |
82 | * queue; in the latter case the queued message is processed once the process | |
83 | * owning the socket lock releases it. | |
84 | * | |
85 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
86 | * the problem of a blocked socket operation preventing any other operations | |
87 | * from occurring. However, applications must be careful if they have | |
88 | * multiple threads trying to send (or receive) on the same socket, as these | |
89 | * operations might interfere with each other. For example, doing a connect | |
90 | * and a receive at the same time might allow the receive to consume the | |
91 | * ACK message meant for the connect. While additional work could be done | |
92 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
93 | * | |
94 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
95 | * that another operation that must be performed in a non-blocking manner is | |
96 | * not delayed for very long because the lock has already been taken. | |
97 | * | |
98 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
99 | * constant over its lifetime; such fields can be examined without taking | |
100 | * the socket lock and/or port lock, and do not need to be re-read even | |
101 | * after resuming processing after waiting. These fields include: | |
102 | * - socket type | |
103 | * - pointer to socket sk structure (aka tipc_sock structure) | |
104 | * - pointer to port structure | |
105 | * - port reference | |
106 | */ | |
107 | ||
8826cde6 JPM |
108 | #include "socket.h" |
109 | ||
0c3141e9 AS |
110 | /** |
111 | * advance_rx_queue - discard first buffer in socket receive queue | |
112 | * | |
113 | * Caller must hold socket lock | |
b97bf3fd | 114 | */ |
0c3141e9 | 115 | static void advance_rx_queue(struct sock *sk) |
b97bf3fd | 116 | { |
5f6d9123 | 117 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
118 | } |
119 | ||
b97bf3fd | 120 | /** |
0c3141e9 AS |
121 | * reject_rx_queue - reject all buffers in socket receive queue |
122 | * | |
123 | * Caller must hold socket lock | |
b97bf3fd | 124 | */ |
0c3141e9 | 125 | static void reject_rx_queue(struct sock *sk) |
b97bf3fd | 126 | { |
0c3141e9 AS |
127 | struct sk_buff *buf; |
128 | ||
9da3d475 | 129 | while ((buf = __skb_dequeue(&sk->sk_receive_queue))) |
0c3141e9 | 130 | tipc_reject_msg(buf, TIPC_ERR_NO_PORT); |
b97bf3fd PL |
131 | } |
132 | ||
133 | /** | |
c5fa7b3c | 134 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 135 | * @net: network namespace (must be default network) |
b97bf3fd PL |
136 | * @sock: pre-allocated socket structure |
137 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 138 | * @kern: caused by kernel or by userspace? |
c4307285 | 139 | * |
0c3141e9 AS |
140 | * This routine creates additional data structures used by the TIPC socket, |
141 | * initializes them, and links them together. | |
b97bf3fd PL |
142 | * |
143 | * Returns 0 on success, errno otherwise | |
144 | */ | |
c5fa7b3c YX |
145 | static int tipc_sk_create(struct net *net, struct socket *sock, int protocol, |
146 | int kern) | |
b97bf3fd | 147 | { |
0c3141e9 AS |
148 | const struct proto_ops *ops; |
149 | socket_state state; | |
b97bf3fd | 150 | struct sock *sk; |
7ef43eba | 151 | struct tipc_port *tp_ptr; |
0c3141e9 AS |
152 | |
153 | /* Validate arguments */ | |
b97bf3fd PL |
154 | if (unlikely(protocol != 0)) |
155 | return -EPROTONOSUPPORT; | |
156 | ||
b97bf3fd PL |
157 | switch (sock->type) { |
158 | case SOCK_STREAM: | |
0c3141e9 AS |
159 | ops = &stream_ops; |
160 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
161 | break; |
162 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
163 | ops = &packet_ops; |
164 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
165 | break; |
166 | case SOCK_DGRAM: | |
b97bf3fd | 167 | case SOCK_RDM: |
0c3141e9 AS |
168 | ops = &msg_ops; |
169 | state = SS_READY; | |
b97bf3fd | 170 | break; |
49978651 | 171 | default: |
49978651 | 172 | return -EPROTOTYPE; |
b97bf3fd PL |
173 | } |
174 | ||
0c3141e9 | 175 | /* Allocate socket's protocol area */ |
c5fa7b3c YX |
176 | if (!kern) |
177 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); | |
178 | else | |
179 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); | |
180 | ||
0c3141e9 | 181 | if (sk == NULL) |
b97bf3fd | 182 | return -ENOMEM; |
b97bf3fd | 183 | |
0c3141e9 | 184 | /* Allocate TIPC port for socket to use */ |
3c5db8e4 YX |
185 | tp_ptr = tipc_createport(sk, &dispatch, &wakeupdispatch, |
186 | TIPC_LOW_IMPORTANCE); | |
0ea52241 | 187 | if (unlikely(!tp_ptr)) { |
0c3141e9 AS |
188 | sk_free(sk); |
189 | return -ENOMEM; | |
190 | } | |
b97bf3fd | 191 | |
0c3141e9 | 192 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
193 | sock->ops = ops; |
194 | sock->state = state; | |
b97bf3fd | 195 | |
0c3141e9 | 196 | sock_init_data(sock, sk); |
0c3141e9 | 197 | sk->sk_backlog_rcv = backlog_rcv; |
cc79dd1b | 198 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
199 | sk->sk_data_ready = tipc_data_ready; |
200 | sk->sk_write_space = tipc_write_space; | |
a0f40f02 | 201 | tipc_sk(sk)->conn_timeout = CONN_TIMEOUT_DEFAULT; |
b97bf3fd | 202 | |
7ef43eba AS |
203 | spin_unlock_bh(tp_ptr->lock); |
204 | ||
0c3141e9 | 205 | if (sock->state == SS_READY) { |
0ea52241 | 206 | tipc_set_portunreturnable(tp_ptr->ref, 1); |
0c3141e9 | 207 | if (sock->type == SOCK_DGRAM) |
0ea52241 | 208 | tipc_set_portunreliable(tp_ptr->ref, 1); |
0c3141e9 | 209 | } |
b97bf3fd PL |
210 | |
211 | return 0; | |
212 | } | |
213 | ||
c5fa7b3c YX |
214 | /** |
215 | * tipc_sock_create_local - create TIPC socket from inside TIPC module | |
216 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET | |
217 | * | |
218 | * We cannot use sock_creat_kern here because it bumps module user count. | |
219 | * Since socket owner and creator is the same module we must make sure | |
220 | * that module count remains zero for module local sockets, otherwise | |
221 | * we cannot do rmmod. | |
222 | * | |
223 | * Returns 0 on success, errno otherwise | |
224 | */ | |
225 | int tipc_sock_create_local(int type, struct socket **res) | |
226 | { | |
227 | int rc; | |
c5fa7b3c YX |
228 | |
229 | rc = sock_create_lite(AF_TIPC, type, 0, res); | |
230 | if (rc < 0) { | |
231 | pr_err("Failed to create kernel socket\n"); | |
232 | return rc; | |
233 | } | |
234 | tipc_sk_create(&init_net, *res, 0, 1); | |
235 | ||
c5fa7b3c YX |
236 | return 0; |
237 | } | |
238 | ||
239 | /** | |
240 | * tipc_sock_release_local - release socket created by tipc_sock_create_local | |
241 | * @sock: the socket to be released. | |
242 | * | |
243 | * Module reference count is not incremented when such sockets are created, | |
244 | * so we must keep it from being decremented when they are released. | |
245 | */ | |
246 | void tipc_sock_release_local(struct socket *sock) | |
247 | { | |
247f0f3c | 248 | tipc_release(sock); |
c5fa7b3c YX |
249 | sock->ops = NULL; |
250 | sock_release(sock); | |
251 | } | |
252 | ||
253 | /** | |
254 | * tipc_sock_accept_local - accept a connection on a socket created | |
255 | * with tipc_sock_create_local. Use this function to avoid that | |
256 | * module reference count is inadvertently incremented. | |
257 | * | |
258 | * @sock: the accepting socket | |
259 | * @newsock: reference to the new socket to be created | |
260 | * @flags: socket flags | |
261 | */ | |
262 | ||
263 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, | |
ae8509c4 | 264 | int flags) |
c5fa7b3c YX |
265 | { |
266 | struct sock *sk = sock->sk; | |
267 | int ret; | |
268 | ||
269 | ret = sock_create_lite(sk->sk_family, sk->sk_type, | |
270 | sk->sk_protocol, newsock); | |
271 | if (ret < 0) | |
272 | return ret; | |
273 | ||
247f0f3c | 274 | ret = tipc_accept(sock, *newsock, flags); |
c5fa7b3c YX |
275 | if (ret < 0) { |
276 | sock_release(*newsock); | |
277 | return ret; | |
278 | } | |
279 | (*newsock)->ops = sock->ops; | |
280 | return ret; | |
281 | } | |
282 | ||
b97bf3fd | 283 | /** |
247f0f3c | 284 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
285 | * @sock: socket to destroy |
286 | * | |
287 | * This routine cleans up any messages that are still queued on the socket. | |
288 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
289 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
290 | * and any others are discarded. (If the first message on a STREAM socket | |
291 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 292 | * |
b97bf3fd PL |
293 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
294 | * are returned or discarded according to the "destination droppable" setting | |
295 | * specified for the message by the sender. | |
296 | * | |
297 | * Returns 0 on success, errno otherwise | |
298 | */ | |
247f0f3c | 299 | static int tipc_release(struct socket *sock) |
b97bf3fd | 300 | { |
b97bf3fd | 301 | struct sock *sk = sock->sk; |
0c3141e9 | 302 | struct tipc_port *tport; |
b97bf3fd | 303 | struct sk_buff *buf; |
0c3141e9 | 304 | int res; |
b97bf3fd | 305 | |
0c3141e9 AS |
306 | /* |
307 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
308 | * releases a pre-allocated child socket that was never used) | |
309 | */ | |
0c3141e9 | 310 | if (sk == NULL) |
b97bf3fd | 311 | return 0; |
c4307285 | 312 | |
0c3141e9 AS |
313 | tport = tipc_sk_port(sk); |
314 | lock_sock(sk); | |
315 | ||
316 | /* | |
317 | * Reject all unreceived messages, except on an active connection | |
318 | * (which disconnects locally & sends a 'FIN+' to peer) | |
319 | */ | |
b97bf3fd | 320 | while (sock->state != SS_DISCONNECTING) { |
0c3141e9 AS |
321 | buf = __skb_dequeue(&sk->sk_receive_queue); |
322 | if (buf == NULL) | |
b97bf3fd | 323 | break; |
40682432 | 324 | if (TIPC_SKB_CB(buf)->handle != NULL) |
5f6d9123 | 325 | kfree_skb(buf); |
0c3141e9 AS |
326 | else { |
327 | if ((sock->state == SS_CONNECTING) || | |
328 | (sock->state == SS_CONNECTED)) { | |
329 | sock->state = SS_DISCONNECTING; | |
247f0f3c | 330 | tipc_port_disconnect(tport->ref); |
0c3141e9 | 331 | } |
b97bf3fd | 332 | tipc_reject_msg(buf, TIPC_ERR_NO_PORT); |
0c3141e9 | 333 | } |
b97bf3fd PL |
334 | } |
335 | ||
0c3141e9 AS |
336 | /* |
337 | * Delete TIPC port; this ensures no more messages are queued | |
338 | * (also disconnects an active connection & sends a 'FIN-' to peer) | |
339 | */ | |
84602761 | 340 | res = tipc_deleteport(tport); |
b97bf3fd | 341 | |
0c3141e9 | 342 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 343 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 344 | |
0c3141e9 | 345 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
346 | sock->state = SS_DISCONNECTING; |
347 | release_sock(sk); | |
b97bf3fd PL |
348 | |
349 | sock_put(sk); | |
0c3141e9 | 350 | sock->sk = NULL; |
b97bf3fd | 351 | |
b97bf3fd PL |
352 | return res; |
353 | } | |
354 | ||
355 | /** | |
247f0f3c | 356 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
357 | * @sock: socket structure |
358 | * @uaddr: socket address describing name(s) and desired operation | |
359 | * @uaddr_len: size of socket address data structure | |
c4307285 | 360 | * |
b97bf3fd PL |
361 | * Name and name sequence binding is indicated using a positive scope value; |
362 | * a negative scope value unbinds the specified name. Specifying no name | |
363 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 364 | * |
b97bf3fd | 365 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
366 | * |
367 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
368 | * access any non-constant socket information. | |
b97bf3fd | 369 | */ |
247f0f3c YX |
370 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
371 | int uaddr_len) | |
b97bf3fd | 372 | { |
84602761 | 373 | struct sock *sk = sock->sk; |
b97bf3fd | 374 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
84602761 YX |
375 | struct tipc_port *tport = tipc_sk_port(sock->sk); |
376 | int res = -EINVAL; | |
b97bf3fd | 377 | |
84602761 YX |
378 | lock_sock(sk); |
379 | if (unlikely(!uaddr_len)) { | |
380 | res = tipc_withdraw(tport, 0, NULL); | |
381 | goto exit; | |
382 | } | |
c4307285 | 383 | |
84602761 YX |
384 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
385 | res = -EINVAL; | |
386 | goto exit; | |
387 | } | |
388 | if (addr->family != AF_TIPC) { | |
389 | res = -EAFNOSUPPORT; | |
390 | goto exit; | |
391 | } | |
b97bf3fd | 392 | |
b97bf3fd PL |
393 | if (addr->addrtype == TIPC_ADDR_NAME) |
394 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
395 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
396 | res = -EAFNOSUPPORT; | |
397 | goto exit; | |
398 | } | |
c4307285 | 399 | |
13a2e898 | 400 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 401 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
402 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
403 | res = -EACCES; | |
404 | goto exit; | |
405 | } | |
c422f1bd | 406 | |
84602761 YX |
407 | res = (addr->scope > 0) ? |
408 | tipc_publish(tport, addr->scope, &addr->addr.nameseq) : | |
409 | tipc_withdraw(tport, -addr->scope, &addr->addr.nameseq); | |
410 | exit: | |
411 | release_sock(sk); | |
412 | return res; | |
b97bf3fd PL |
413 | } |
414 | ||
c4307285 | 415 | /** |
247f0f3c | 416 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
417 | * @sock: socket structure |
418 | * @uaddr: area for returned socket address | |
419 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 420 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 421 | * |
b97bf3fd | 422 | * Returns 0 on success, errno otherwise |
0c3141e9 | 423 | * |
2da59918 AS |
424 | * NOTE: This routine doesn't need to take the socket lock since it only |
425 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 426 | * a completely predictable manner). |
b97bf3fd | 427 | */ |
247f0f3c YX |
428 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
429 | int *uaddr_len, int peer) | |
b97bf3fd | 430 | { |
b97bf3fd | 431 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
8826cde6 | 432 | struct tipc_port *port = tipc_sk_port(sock->sk); |
b97bf3fd | 433 | |
88f8a5e3 | 434 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 435 | if (peer) { |
2da59918 AS |
436 | if ((sock->state != SS_CONNECTED) && |
437 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
438 | return -ENOTCONN; | |
8826cde6 JPM |
439 | addr->addr.id.ref = tipc_port_peerport(port); |
440 | addr->addr.id.node = tipc_port_peernode(port); | |
0c3141e9 | 441 | } else { |
8826cde6 | 442 | addr->addr.id.ref = port->ref; |
b924dcf0 | 443 | addr->addr.id.node = tipc_own_addr; |
0c3141e9 | 444 | } |
b97bf3fd PL |
445 | |
446 | *uaddr_len = sizeof(*addr); | |
447 | addr->addrtype = TIPC_ADDR_ID; | |
448 | addr->family = AF_TIPC; | |
449 | addr->scope = 0; | |
b97bf3fd PL |
450 | addr->addr.name.domain = 0; |
451 | ||
0c3141e9 | 452 | return 0; |
b97bf3fd PL |
453 | } |
454 | ||
455 | /** | |
247f0f3c | 456 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
457 | * @file: file structure associated with the socket |
458 | * @sock: socket for which to calculate the poll bits | |
459 | * @wait: ??? | |
460 | * | |
9b674e82 AS |
461 | * Returns pollmask value |
462 | * | |
463 | * COMMENTARY: | |
464 | * It appears that the usual socket locking mechanisms are not useful here | |
465 | * since the pollmask info is potentially out-of-date the moment this routine | |
466 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
467 | * to handle any preventable race conditions, so TIPC will do the same ... | |
468 | * | |
469 | * TIPC sets the returned events as follows: | |
f662c070 AS |
470 | * |
471 | * socket state flags set | |
472 | * ------------ --------- | |
473 | * unconnected no read flags | |
c4fc298a | 474 | * POLLOUT if port is not congested |
f662c070 AS |
475 | * |
476 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
477 | * no write flags | |
478 | * | |
479 | * connected POLLIN/POLLRDNORM if data in rx queue | |
480 | * POLLOUT if port is not congested | |
481 | * | |
482 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
483 | * no write flags | |
484 | * | |
485 | * listening POLLIN if SYN in rx queue | |
486 | * no write flags | |
487 | * | |
488 | * ready POLLIN/POLLRDNORM if data in rx queue | |
489 | * [connectionless] POLLOUT (since port cannot be congested) | |
490 | * | |
491 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
492 | * imply that the operation will succeed, merely that it should be performed | |
493 | * and will not block. | |
b97bf3fd | 494 | */ |
247f0f3c YX |
495 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
496 | poll_table *wait) | |
b97bf3fd | 497 | { |
9b674e82 | 498 | struct sock *sk = sock->sk; |
f662c070 | 499 | u32 mask = 0; |
9b674e82 | 500 | |
f288bef4 | 501 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 502 | |
f662c070 | 503 | switch ((int)sock->state) { |
c4fc298a EH |
504 | case SS_UNCONNECTED: |
505 | if (!tipc_sk_port(sk)->congested) | |
506 | mask |= POLLOUT; | |
507 | break; | |
f662c070 AS |
508 | case SS_READY: |
509 | case SS_CONNECTED: | |
510 | if (!tipc_sk_port(sk)->congested) | |
511 | mask |= POLLOUT; | |
512 | /* fall thru' */ | |
513 | case SS_CONNECTING: | |
514 | case SS_LISTENING: | |
515 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
516 | mask |= (POLLIN | POLLRDNORM); | |
517 | break; | |
518 | case SS_DISCONNECTING: | |
519 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
520 | break; | |
521 | } | |
9b674e82 AS |
522 | |
523 | return mask; | |
b97bf3fd PL |
524 | } |
525 | ||
c4307285 | 526 | /** |
b97bf3fd PL |
527 | * dest_name_check - verify user is permitted to send to specified port name |
528 | * @dest: destination address | |
529 | * @m: descriptor for message to be sent | |
c4307285 | 530 | * |
b97bf3fd PL |
531 | * Prevents restricted configuration commands from being issued by |
532 | * unauthorized users. | |
c4307285 | 533 | * |
b97bf3fd PL |
534 | * Returns 0 if permission is granted, otherwise errno |
535 | */ | |
05790c64 | 536 | static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m) |
b97bf3fd PL |
537 | { |
538 | struct tipc_cfg_msg_hdr hdr; | |
539 | ||
c4307285 YH |
540 | if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES)) |
541 | return 0; | |
542 | if (likely(dest->addr.name.name.type == TIPC_TOP_SRV)) | |
543 | return 0; | |
c4307285 YH |
544 | if (likely(dest->addr.name.name.type != TIPC_CFG_SRV)) |
545 | return -EACCES; | |
b97bf3fd | 546 | |
3f8dd944 AS |
547 | if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr))) |
548 | return -EMSGSIZE; | |
c4307285 | 549 | if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr))) |
b97bf3fd | 550 | return -EFAULT; |
70cb2347 | 551 | if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN))) |
b97bf3fd | 552 | return -EACCES; |
c4307285 | 553 | |
b97bf3fd PL |
554 | return 0; |
555 | } | |
556 | ||
3f40504f YX |
557 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
558 | { | |
559 | struct sock *sk = sock->sk; | |
560 | struct tipc_port *tport = tipc_sk_port(sk); | |
561 | DEFINE_WAIT(wait); | |
562 | int done; | |
563 | ||
564 | do { | |
565 | int err = sock_error(sk); | |
566 | if (err) | |
567 | return err; | |
568 | if (sock->state == SS_DISCONNECTING) | |
569 | return -EPIPE; | |
570 | if (!*timeo_p) | |
571 | return -EAGAIN; | |
572 | if (signal_pending(current)) | |
573 | return sock_intr_errno(*timeo_p); | |
574 | ||
575 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
576 | done = sk_wait_event(sk, timeo_p, !tport->congested); | |
577 | finish_wait(sk_sleep(sk), &wait); | |
578 | } while (!done); | |
579 | return 0; | |
580 | } | |
581 | ||
b97bf3fd | 582 | /** |
247f0f3c | 583 | * tipc_sendmsg - send message in connectionless manner |
0c3141e9 | 584 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
585 | * @sock: socket structure |
586 | * @m: message to send | |
e9024f0f | 587 | * @total_len: length of message |
c4307285 | 588 | * |
b97bf3fd | 589 | * Message must have an destination specified explicitly. |
c4307285 | 590 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
591 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
592 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 593 | * |
b97bf3fd PL |
594 | * Returns the number of bytes sent on success, or errno otherwise |
595 | */ | |
247f0f3c YX |
596 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
597 | struct msghdr *m, size_t total_len) | |
b97bf3fd | 598 | { |
0c3141e9 AS |
599 | struct sock *sk = sock->sk; |
600 | struct tipc_port *tport = tipc_sk_port(sk); | |
342dfc30 | 601 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
b97bf3fd | 602 | int needs_conn; |
3f40504f | 603 | long timeo; |
b97bf3fd PL |
604 | int res = -EINVAL; |
605 | ||
606 | if (unlikely(!dest)) | |
607 | return -EDESTADDRREQ; | |
51f9cc1f AS |
608 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
609 | (dest->family != AF_TIPC))) | |
b97bf3fd | 610 | return -EINVAL; |
97f8b87e | 611 | if (total_len > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 612 | return -EMSGSIZE; |
b97bf3fd | 613 | |
0c3141e9 AS |
614 | if (iocb) |
615 | lock_sock(sk); | |
616 | ||
b97bf3fd PL |
617 | needs_conn = (sock->state != SS_READY); |
618 | if (unlikely(needs_conn)) { | |
0c3141e9 AS |
619 | if (sock->state == SS_LISTENING) { |
620 | res = -EPIPE; | |
621 | goto exit; | |
622 | } | |
623 | if (sock->state != SS_UNCONNECTED) { | |
624 | res = -EISCONN; | |
625 | goto exit; | |
626 | } | |
5d21cb70 | 627 | if (tport->published) { |
0c3141e9 AS |
628 | res = -EOPNOTSUPP; |
629 | goto exit; | |
630 | } | |
3388007b | 631 | if (dest->addrtype == TIPC_ADDR_NAME) { |
0c3141e9 AS |
632 | tport->conn_type = dest->addr.name.name.type; |
633 | tport->conn_instance = dest->addr.name.name.instance; | |
3388007b | 634 | } |
b97bf3fd PL |
635 | |
636 | /* Abort any pending connection attempts (very unlikely) */ | |
0c3141e9 | 637 | reject_rx_queue(sk); |
b97bf3fd PL |
638 | } |
639 | ||
3f40504f | 640 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
c4307285 YH |
641 | do { |
642 | if (dest->addrtype == TIPC_ADDR_NAME) { | |
2db9983a AS |
643 | res = dest_name_check(dest, m); |
644 | if (res) | |
0c3141e9 AS |
645 | break; |
646 | res = tipc_send2name(tport->ref, | |
c4307285 YH |
647 | &dest->addr.name.name, |
648 | dest->addr.name.domain, | |
26896904 AS |
649 | m->msg_iov, |
650 | total_len); | |
0e65967e | 651 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
0c3141e9 | 652 | res = tipc_send2port(tport->ref, |
c4307285 | 653 | &dest->addr.id, |
26896904 AS |
654 | m->msg_iov, |
655 | total_len); | |
0e65967e | 656 | } else if (dest->addrtype == TIPC_ADDR_MCAST) { |
b97bf3fd PL |
657 | if (needs_conn) { |
658 | res = -EOPNOTSUPP; | |
0c3141e9 | 659 | break; |
b97bf3fd | 660 | } |
2db9983a AS |
661 | res = dest_name_check(dest, m); |
662 | if (res) | |
0c3141e9 | 663 | break; |
247f0f3c YX |
664 | res = tipc_port_mcast_xmit(tport->ref, |
665 | &dest->addr.nameseq, | |
666 | m->msg_iov, | |
667 | total_len); | |
c4307285 YH |
668 | } |
669 | if (likely(res != -ELINKCONG)) { | |
a016892c | 670 | if (needs_conn && (res >= 0)) |
0c3141e9 | 671 | sock->state = SS_CONNECTING; |
0c3141e9 | 672 | break; |
c4307285 | 673 | } |
3f40504f YX |
674 | res = tipc_wait_for_sndmsg(sock, &timeo); |
675 | if (res) | |
0c3141e9 | 676 | break; |
c4307285 | 677 | } while (1); |
0c3141e9 AS |
678 | |
679 | exit: | |
680 | if (iocb) | |
681 | release_sock(sk); | |
682 | return res; | |
b97bf3fd PL |
683 | } |
684 | ||
391a6dd1 YX |
685 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
686 | { | |
687 | struct sock *sk = sock->sk; | |
688 | struct tipc_port *tport = tipc_sk_port(sk); | |
689 | DEFINE_WAIT(wait); | |
690 | int done; | |
691 | ||
692 | do { | |
693 | int err = sock_error(sk); | |
694 | if (err) | |
695 | return err; | |
696 | if (sock->state == SS_DISCONNECTING) | |
697 | return -EPIPE; | |
698 | else if (sock->state != SS_CONNECTED) | |
699 | return -ENOTCONN; | |
700 | if (!*timeo_p) | |
701 | return -EAGAIN; | |
702 | if (signal_pending(current)) | |
703 | return sock_intr_errno(*timeo_p); | |
704 | ||
705 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
706 | done = sk_wait_event(sk, timeo_p, | |
707 | (!tport->congested || !tport->connected)); | |
708 | finish_wait(sk_sleep(sk), &wait); | |
709 | } while (!done); | |
710 | return 0; | |
711 | } | |
712 | ||
c4307285 | 713 | /** |
247f0f3c | 714 | * tipc_send_packet - send a connection-oriented message |
0c3141e9 | 715 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
716 | * @sock: socket structure |
717 | * @m: message to send | |
e9024f0f | 718 | * @total_len: length of message |
c4307285 | 719 | * |
b97bf3fd | 720 | * Used for SOCK_SEQPACKET messages and SOCK_STREAM data. |
c4307285 | 721 | * |
b97bf3fd PL |
722 | * Returns the number of bytes sent on success, or errno otherwise |
723 | */ | |
247f0f3c YX |
724 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
725 | struct msghdr *m, size_t total_len) | |
b97bf3fd | 726 | { |
0c3141e9 AS |
727 | struct sock *sk = sock->sk; |
728 | struct tipc_port *tport = tipc_sk_port(sk); | |
342dfc30 | 729 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
391a6dd1 YX |
730 | int res = -EINVAL; |
731 | long timeo; | |
b97bf3fd PL |
732 | |
733 | /* Handle implied connection establishment */ | |
b97bf3fd | 734 | if (unlikely(dest)) |
247f0f3c | 735 | return tipc_sendmsg(iocb, sock, m, total_len); |
b97bf3fd | 736 | |
97f8b87e | 737 | if (total_len > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 AS |
738 | return -EMSGSIZE; |
739 | ||
0c3141e9 AS |
740 | if (iocb) |
741 | lock_sock(sk); | |
b97bf3fd | 742 | |
391a6dd1 YX |
743 | if (unlikely(sock->state != SS_CONNECTED)) { |
744 | if (sock->state == SS_DISCONNECTING) | |
745 | res = -EPIPE; | |
746 | else | |
747 | res = -ENOTCONN; | |
748 | goto exit; | |
749 | } | |
1d835874 | 750 | |
391a6dd1 | 751 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
c4307285 | 752 | do { |
9446b87a | 753 | res = tipc_send(tport->ref, m->msg_iov, total_len); |
a016892c | 754 | if (likely(res != -ELINKCONG)) |
0c3141e9 | 755 | break; |
391a6dd1 YX |
756 | res = tipc_wait_for_sndpkt(sock, &timeo); |
757 | if (res) | |
0c3141e9 | 758 | break; |
c4307285 | 759 | } while (1); |
391a6dd1 | 760 | exit: |
0c3141e9 AS |
761 | if (iocb) |
762 | release_sock(sk); | |
763 | return res; | |
b97bf3fd PL |
764 | } |
765 | ||
c4307285 | 766 | /** |
247f0f3c | 767 | * tipc_send_stream - send stream-oriented data |
b97bf3fd PL |
768 | * @iocb: (unused) |
769 | * @sock: socket structure | |
770 | * @m: data to send | |
771 | * @total_len: total length of data to be sent | |
c4307285 | 772 | * |
b97bf3fd | 773 | * Used for SOCK_STREAM data. |
c4307285 YH |
774 | * |
775 | * Returns the number of bytes sent on success (or partial success), | |
1303e8f1 | 776 | * or errno if no data sent |
b97bf3fd | 777 | */ |
247f0f3c YX |
778 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
779 | struct msghdr *m, size_t total_len) | |
b97bf3fd | 780 | { |
0c3141e9 AS |
781 | struct sock *sk = sock->sk; |
782 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
783 | struct msghdr my_msg; |
784 | struct iovec my_iov; | |
785 | struct iovec *curr_iov; | |
786 | int curr_iovlen; | |
787 | char __user *curr_start; | |
05646c91 | 788 | u32 hdr_size; |
b97bf3fd PL |
789 | int curr_left; |
790 | int bytes_to_send; | |
1303e8f1 | 791 | int bytes_sent; |
b97bf3fd | 792 | int res; |
c4307285 | 793 | |
0c3141e9 AS |
794 | lock_sock(sk); |
795 | ||
05646c91 | 796 | /* Handle special cases where there is no connection */ |
c4307285 | 797 | if (unlikely(sock->state != SS_CONNECTED)) { |
3b8401fe | 798 | if (sock->state == SS_UNCONNECTED) |
247f0f3c | 799 | res = tipc_send_packet(NULL, sock, m, total_len); |
b0555976 | 800 | else |
801 | res = sock->state == SS_DISCONNECTING ? -EPIPE : -ENOTCONN; | |
3b8401fe | 802 | goto exit; |
c4307285 | 803 | } |
b97bf3fd | 804 | |
0c3141e9 AS |
805 | if (unlikely(m->msg_name)) { |
806 | res = -EISCONN; | |
807 | goto exit; | |
808 | } | |
eb5959c2 | 809 | |
97f8b87e | 810 | if (total_len > (unsigned int)INT_MAX) { |
c29c3f70 AS |
811 | res = -EMSGSIZE; |
812 | goto exit; | |
813 | } | |
814 | ||
c4307285 | 815 | /* |
b97bf3fd PL |
816 | * Send each iovec entry using one or more messages |
817 | * | |
c4307285 | 818 | * Note: This algorithm is good for the most likely case |
b97bf3fd PL |
819 | * (i.e. one large iovec entry), but could be improved to pass sets |
820 | * of small iovec entries into send_packet(). | |
821 | */ | |
1303e8f1 AS |
822 | curr_iov = m->msg_iov; |
823 | curr_iovlen = m->msg_iovlen; | |
b97bf3fd PL |
824 | my_msg.msg_iov = &my_iov; |
825 | my_msg.msg_iovlen = 1; | |
eb5959c2 AS |
826 | my_msg.msg_flags = m->msg_flags; |
827 | my_msg.msg_name = NULL; | |
1303e8f1 | 828 | bytes_sent = 0; |
b97bf3fd | 829 | |
05646c91 AS |
830 | hdr_size = msg_hdr_sz(&tport->phdr); |
831 | ||
b97bf3fd PL |
832 | while (curr_iovlen--) { |
833 | curr_start = curr_iov->iov_base; | |
834 | curr_left = curr_iov->iov_len; | |
835 | ||
836 | while (curr_left) { | |
05646c91 AS |
837 | bytes_to_send = tport->max_pkt - hdr_size; |
838 | if (bytes_to_send > TIPC_MAX_USER_MSG_SIZE) | |
839 | bytes_to_send = TIPC_MAX_USER_MSG_SIZE; | |
840 | if (curr_left < bytes_to_send) | |
841 | bytes_to_send = curr_left; | |
b97bf3fd PL |
842 | my_iov.iov_base = curr_start; |
843 | my_iov.iov_len = bytes_to_send; | |
247f0f3c YX |
844 | res = tipc_send_packet(NULL, sock, &my_msg, |
845 | bytes_to_send); | |
2db9983a | 846 | if (res < 0) { |
0c3141e9 | 847 | if (bytes_sent) |
05646c91 | 848 | res = bytes_sent; |
0c3141e9 | 849 | goto exit; |
1303e8f1 | 850 | } |
b97bf3fd PL |
851 | curr_left -= bytes_to_send; |
852 | curr_start += bytes_to_send; | |
1303e8f1 | 853 | bytes_sent += bytes_to_send; |
b97bf3fd PL |
854 | } |
855 | ||
856 | curr_iov++; | |
857 | } | |
0c3141e9 AS |
858 | res = bytes_sent; |
859 | exit: | |
860 | release_sock(sk); | |
861 | return res; | |
b97bf3fd PL |
862 | } |
863 | ||
864 | /** | |
865 | * auto_connect - complete connection setup to a remote port | |
866 | * @sock: socket structure | |
b97bf3fd | 867 | * @msg: peer's response message |
c4307285 | 868 | * |
b97bf3fd PL |
869 | * Returns 0 on success, errno otherwise |
870 | */ | |
0c3141e9 | 871 | static int auto_connect(struct socket *sock, struct tipc_msg *msg) |
b97bf3fd | 872 | { |
8826cde6 | 873 | struct tipc_port *p_ptr = tipc_sk_port(sock->sk); |
f9fef18c JPM |
874 | struct tipc_portid peer; |
875 | ||
876 | peer.ref = msg_origport(msg); | |
877 | peer.node = msg_orignode(msg); | |
b97bf3fd | 878 | |
8826cde6 | 879 | p_ptr = tipc_port_deref(p_ptr->ref); |
584d24b3 YX |
880 | if (!p_ptr) |
881 | return -EINVAL; | |
882 | ||
f9fef18c | 883 | __tipc_port_connect(p_ptr->ref, p_ptr, &peer); |
584d24b3 YX |
884 | |
885 | if (msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE) | |
886 | return -EINVAL; | |
887 | msg_set_importance(&p_ptr->phdr, (u32)msg_importance(msg)); | |
b97bf3fd PL |
888 | sock->state = SS_CONNECTED; |
889 | return 0; | |
890 | } | |
891 | ||
892 | /** | |
893 | * set_orig_addr - capture sender's address for received message | |
894 | * @m: descriptor for message info | |
895 | * @msg: received message header | |
c4307285 | 896 | * |
b97bf3fd PL |
897 | * Note: Address is not captured if not requested by receiver. |
898 | */ | |
05790c64 | 899 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 900 | { |
342dfc30 | 901 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 902 | |
c4307285 | 903 | if (addr) { |
b97bf3fd PL |
904 | addr->family = AF_TIPC; |
905 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 906 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
907 | addr->addr.id.ref = msg_origport(msg); |
908 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
909 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
910 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
911 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
912 | } | |
913 | } | |
914 | ||
915 | /** | |
c4307285 | 916 | * anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
917 | * @m: descriptor for message info |
918 | * @msg: received message header | |
919 | * @tport: TIPC port associated with message | |
c4307285 | 920 | * |
b97bf3fd | 921 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 922 | * |
b97bf3fd PL |
923 | * Returns 0 if successful, otherwise errno |
924 | */ | |
05790c64 | 925 | static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
ae8509c4 | 926 | struct tipc_port *tport) |
b97bf3fd PL |
927 | { |
928 | u32 anc_data[3]; | |
929 | u32 err; | |
930 | u32 dest_type; | |
3546c750 | 931 | int has_name; |
b97bf3fd PL |
932 | int res; |
933 | ||
934 | if (likely(m->msg_controllen == 0)) | |
935 | return 0; | |
936 | ||
937 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
938 | err = msg ? msg_errcode(msg) : 0; |
939 | if (unlikely(err)) { | |
940 | anc_data[0] = err; | |
941 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
942 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
943 | if (res) | |
b97bf3fd | 944 | return res; |
2db9983a AS |
945 | if (anc_data[1]) { |
946 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
947 | msg_data(msg)); | |
948 | if (res) | |
949 | return res; | |
950 | } | |
b97bf3fd PL |
951 | } |
952 | ||
953 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
954 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
955 | switch (dest_type) { | |
956 | case TIPC_NAMED_MSG: | |
3546c750 | 957 | has_name = 1; |
b97bf3fd PL |
958 | anc_data[0] = msg_nametype(msg); |
959 | anc_data[1] = msg_namelower(msg); | |
960 | anc_data[2] = msg_namelower(msg); | |
961 | break; | |
962 | case TIPC_MCAST_MSG: | |
3546c750 | 963 | has_name = 1; |
b97bf3fd PL |
964 | anc_data[0] = msg_nametype(msg); |
965 | anc_data[1] = msg_namelower(msg); | |
966 | anc_data[2] = msg_nameupper(msg); | |
967 | break; | |
968 | case TIPC_CONN_MSG: | |
3546c750 | 969 | has_name = (tport->conn_type != 0); |
b97bf3fd PL |
970 | anc_data[0] = tport->conn_type; |
971 | anc_data[1] = tport->conn_instance; | |
972 | anc_data[2] = tport->conn_instance; | |
973 | break; | |
974 | default: | |
3546c750 | 975 | has_name = 0; |
b97bf3fd | 976 | } |
2db9983a AS |
977 | if (has_name) { |
978 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
979 | if (res) | |
980 | return res; | |
981 | } | |
b97bf3fd PL |
982 | |
983 | return 0; | |
984 | } | |
985 | ||
9bbb4ecc YX |
986 | static int tipc_wait_for_rcvmsg(struct socket *sock, long timeo) |
987 | { | |
988 | struct sock *sk = sock->sk; | |
989 | DEFINE_WAIT(wait); | |
990 | int err; | |
991 | ||
992 | for (;;) { | |
993 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
994 | if (skb_queue_empty(&sk->sk_receive_queue)) { | |
995 | if (sock->state == SS_DISCONNECTING) { | |
996 | err = -ENOTCONN; | |
997 | break; | |
998 | } | |
999 | release_sock(sk); | |
1000 | timeo = schedule_timeout(timeo); | |
1001 | lock_sock(sk); | |
1002 | } | |
1003 | err = 0; | |
1004 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1005 | break; | |
1006 | err = sock_intr_errno(timeo); | |
1007 | if (signal_pending(current)) | |
1008 | break; | |
1009 | err = -EAGAIN; | |
1010 | if (!timeo) | |
1011 | break; | |
1012 | } | |
1013 | finish_wait(sk_sleep(sk), &wait); | |
1014 | return err; | |
1015 | } | |
1016 | ||
c4307285 | 1017 | /** |
247f0f3c | 1018 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1019 | * @iocb: (unused) |
1020 | * @m: descriptor for message info | |
1021 | * @buf_len: total size of user buffer area | |
1022 | * @flags: receive flags | |
c4307285 | 1023 | * |
b97bf3fd PL |
1024 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1025 | * If the complete message doesn't fit in user area, truncate it. | |
1026 | * | |
1027 | * Returns size of returned message data, errno otherwise | |
1028 | */ | |
247f0f3c YX |
1029 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
1030 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1031 | { |
0c3141e9 AS |
1032 | struct sock *sk = sock->sk; |
1033 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
1034 | struct sk_buff *buf; |
1035 | struct tipc_msg *msg; | |
9bbb4ecc | 1036 | long timeo; |
b97bf3fd PL |
1037 | unsigned int sz; |
1038 | u32 err; | |
1039 | int res; | |
1040 | ||
0c3141e9 | 1041 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1042 | if (unlikely(!buf_len)) |
1043 | return -EINVAL; | |
1044 | ||
0c3141e9 | 1045 | lock_sock(sk); |
b97bf3fd | 1046 | |
0c3141e9 AS |
1047 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1048 | res = -ENOTCONN; | |
b97bf3fd PL |
1049 | goto exit; |
1050 | } | |
1051 | ||
9bbb4ecc | 1052 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1053 | restart: |
b97bf3fd | 1054 | |
0c3141e9 | 1055 | /* Look for a message in receive queue; wait if necessary */ |
9bbb4ecc YX |
1056 | res = tipc_wait_for_rcvmsg(sock, timeo); |
1057 | if (res) | |
1058 | goto exit; | |
b97bf3fd | 1059 | |
0c3141e9 | 1060 | /* Look at first message in receive queue */ |
0c3141e9 | 1061 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1062 | msg = buf_msg(buf); |
1063 | sz = msg_data_sz(msg); | |
1064 | err = msg_errcode(msg); | |
1065 | ||
b97bf3fd | 1066 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1067 | if ((!sz) && (!err)) { |
0c3141e9 | 1068 | advance_rx_queue(sk); |
b97bf3fd PL |
1069 | goto restart; |
1070 | } | |
1071 | ||
1072 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1073 | set_orig_addr(m, msg); |
1074 | ||
1075 | /* Capture ancillary data (optional) */ | |
0c3141e9 AS |
1076 | res = anc_data_recv(m, msg, tport); |
1077 | if (res) | |
b97bf3fd PL |
1078 | goto exit; |
1079 | ||
1080 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1081 | if (!err) { |
1082 | if (unlikely(buf_len < sz)) { | |
1083 | sz = buf_len; | |
1084 | m->msg_flags |= MSG_TRUNC; | |
1085 | } | |
0232fd0a AS |
1086 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg), |
1087 | m->msg_iov, sz); | |
1088 | if (res) | |
b97bf3fd | 1089 | goto exit; |
b97bf3fd PL |
1090 | res = sz; |
1091 | } else { | |
1092 | if ((sock->state == SS_READY) || | |
1093 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1094 | res = 0; | |
1095 | else | |
1096 | res = -ECONNRESET; | |
1097 | } | |
1098 | ||
1099 | /* Consume received message (optional) */ | |
b97bf3fd | 1100 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1101 | if ((sock->state != SS_READY) && |
0c3141e9 AS |
1102 | (++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN)) |
1103 | tipc_acknowledge(tport->ref, tport->conn_unacked); | |
1104 | advance_rx_queue(sk); | |
c4307285 | 1105 | } |
b97bf3fd | 1106 | exit: |
0c3141e9 | 1107 | release_sock(sk); |
b97bf3fd PL |
1108 | return res; |
1109 | } | |
1110 | ||
c4307285 | 1111 | /** |
247f0f3c | 1112 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1113 | * @iocb: (unused) |
1114 | * @m: descriptor for message info | |
1115 | * @buf_len: total size of user buffer area | |
1116 | * @flags: receive flags | |
c4307285 YH |
1117 | * |
1118 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1119 | * will optionally wait for more; never truncates data. |
1120 | * | |
1121 | * Returns size of returned message data, errno otherwise | |
1122 | */ | |
247f0f3c YX |
1123 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
1124 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1125 | { |
0c3141e9 AS |
1126 | struct sock *sk = sock->sk; |
1127 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
1128 | struct sk_buff *buf; |
1129 | struct tipc_msg *msg; | |
9bbb4ecc | 1130 | long timeo; |
b97bf3fd | 1131 | unsigned int sz; |
3720d40b | 1132 | int sz_to_copy, target, needed; |
b97bf3fd | 1133 | int sz_copied = 0; |
b97bf3fd | 1134 | u32 err; |
0c3141e9 | 1135 | int res = 0; |
b97bf3fd | 1136 | |
0c3141e9 | 1137 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1138 | if (unlikely(!buf_len)) |
1139 | return -EINVAL; | |
1140 | ||
0c3141e9 | 1141 | lock_sock(sk); |
b97bf3fd | 1142 | |
9bbb4ecc | 1143 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1144 | res = -ENOTCONN; |
b97bf3fd PL |
1145 | goto exit; |
1146 | } | |
1147 | ||
3720d40b | 1148 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1149 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1150 | |
617d3c7a | 1151 | restart: |
0c3141e9 | 1152 | /* Look for a message in receive queue; wait if necessary */ |
9bbb4ecc YX |
1153 | res = tipc_wait_for_rcvmsg(sock, timeo); |
1154 | if (res) | |
1155 | goto exit; | |
b97bf3fd | 1156 | |
0c3141e9 | 1157 | /* Look at first message in receive queue */ |
0c3141e9 | 1158 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1159 | msg = buf_msg(buf); |
1160 | sz = msg_data_sz(msg); | |
1161 | err = msg_errcode(msg); | |
1162 | ||
1163 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1164 | if ((!sz) && (!err)) { |
0c3141e9 | 1165 | advance_rx_queue(sk); |
b97bf3fd PL |
1166 | goto restart; |
1167 | } | |
1168 | ||
1169 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1170 | if (sz_copied == 0) { |
1171 | set_orig_addr(m, msg); | |
0c3141e9 AS |
1172 | res = anc_data_recv(m, msg, tport); |
1173 | if (res) | |
b97bf3fd PL |
1174 | goto exit; |
1175 | } | |
1176 | ||
1177 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1178 | if (!err) { |
0232fd0a | 1179 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1180 | |
0232fd0a | 1181 | sz -= offset; |
b97bf3fd PL |
1182 | needed = (buf_len - sz_copied); |
1183 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a AS |
1184 | |
1185 | res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset, | |
1186 | m->msg_iov, sz_to_copy); | |
1187 | if (res) | |
b97bf3fd | 1188 | goto exit; |
0232fd0a | 1189 | |
b97bf3fd PL |
1190 | sz_copied += sz_to_copy; |
1191 | ||
1192 | if (sz_to_copy < sz) { | |
1193 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1194 | TIPC_SKB_CB(buf)->handle = |
1195 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1196 | goto exit; |
1197 | } | |
b97bf3fd PL |
1198 | } else { |
1199 | if (sz_copied != 0) | |
1200 | goto exit; /* can't add error msg to valid data */ | |
1201 | ||
1202 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1203 | res = 0; | |
1204 | else | |
1205 | res = -ECONNRESET; | |
1206 | } | |
1207 | ||
1208 | /* Consume received message (optional) */ | |
b97bf3fd | 1209 | if (likely(!(flags & MSG_PEEK))) { |
0c3141e9 AS |
1210 | if (unlikely(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN)) |
1211 | tipc_acknowledge(tport->ref, tport->conn_unacked); | |
1212 | advance_rx_queue(sk); | |
c4307285 | 1213 | } |
b97bf3fd PL |
1214 | |
1215 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1216 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1217 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1218 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1219 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1220 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1221 | goto restart; |
1222 | ||
1223 | exit: | |
0c3141e9 | 1224 | release_sock(sk); |
a3b0a5a9 | 1225 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1226 | } |
1227 | ||
f288bef4 YX |
1228 | /** |
1229 | * tipc_write_space - wake up thread if port congestion is released | |
1230 | * @sk: socket | |
1231 | */ | |
1232 | static void tipc_write_space(struct sock *sk) | |
1233 | { | |
1234 | struct socket_wq *wq; | |
1235 | ||
1236 | rcu_read_lock(); | |
1237 | wq = rcu_dereference(sk->sk_wq); | |
1238 | if (wq_has_sleeper(wq)) | |
1239 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1240 | POLLWRNORM | POLLWRBAND); | |
1241 | rcu_read_unlock(); | |
1242 | } | |
1243 | ||
1244 | /** | |
1245 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1246 | * @sk: socket | |
1247 | * @len: the length of messages | |
1248 | */ | |
1249 | static void tipc_data_ready(struct sock *sk, int len) | |
1250 | { | |
1251 | struct socket_wq *wq; | |
1252 | ||
1253 | rcu_read_lock(); | |
1254 | wq = rcu_dereference(sk->sk_wq); | |
1255 | if (wq_has_sleeper(wq)) | |
1256 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1257 | POLLRDNORM | POLLRDBAND); | |
1258 | rcu_read_unlock(); | |
1259 | } | |
1260 | ||
7e6c131e YX |
1261 | /** |
1262 | * filter_connect - Handle all incoming messages for a connection-based socket | |
8826cde6 | 1263 | * @port: TIPC port |
7e6c131e YX |
1264 | * @msg: message |
1265 | * | |
1266 | * Returns TIPC error status code and socket error status code | |
1267 | * once it encounters some errors | |
1268 | */ | |
8826cde6 | 1269 | static u32 filter_connect(struct tipc_port *port, struct sk_buff **buf) |
7e6c131e | 1270 | { |
8826cde6 JPM |
1271 | struct sock *sk = tipc_port_to_sk(port); |
1272 | struct socket *sock = sk->sk_socket; | |
7e6c131e | 1273 | struct tipc_msg *msg = buf_msg(*buf); |
8826cde6 | 1274 | |
7e6c131e | 1275 | u32 retval = TIPC_ERR_NO_PORT; |
584d24b3 | 1276 | int res; |
7e6c131e YX |
1277 | |
1278 | if (msg_mcast(msg)) | |
1279 | return retval; | |
1280 | ||
1281 | switch ((int)sock->state) { | |
1282 | case SS_CONNECTED: | |
1283 | /* Accept only connection-based messages sent by peer */ | |
8826cde6 | 1284 | if (msg_connected(msg) && tipc_port_peer_msg(port, msg)) { |
7e6c131e YX |
1285 | if (unlikely(msg_errcode(msg))) { |
1286 | sock->state = SS_DISCONNECTING; | |
8826cde6 | 1287 | __tipc_port_disconnect(port); |
7e6c131e YX |
1288 | } |
1289 | retval = TIPC_OK; | |
1290 | } | |
1291 | break; | |
1292 | case SS_CONNECTING: | |
1293 | /* Accept only ACK or NACK message */ | |
584d24b3 YX |
1294 | if (unlikely(msg_errcode(msg))) { |
1295 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1296 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1297 | retval = TIPC_OK; |
1298 | break; | |
1299 | } | |
1300 | ||
1301 | if (unlikely(!msg_connected(msg))) | |
1302 | break; | |
1303 | ||
1304 | res = auto_connect(sock, msg); | |
1305 | if (res) { | |
1306 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1307 | sk->sk_err = -res; |
7e6c131e | 1308 | retval = TIPC_OK; |
584d24b3 YX |
1309 | break; |
1310 | } | |
1311 | ||
1312 | /* If an incoming message is an 'ACK-', it should be | |
1313 | * discarded here because it doesn't contain useful | |
1314 | * data. In addition, we should try to wake up | |
1315 | * connect() routine if sleeping. | |
1316 | */ | |
1317 | if (msg_data_sz(msg) == 0) { | |
1318 | kfree_skb(*buf); | |
1319 | *buf = NULL; | |
1320 | if (waitqueue_active(sk_sleep(sk))) | |
1321 | wake_up_interruptible(sk_sleep(sk)); | |
1322 | } | |
1323 | retval = TIPC_OK; | |
7e6c131e YX |
1324 | break; |
1325 | case SS_LISTENING: | |
1326 | case SS_UNCONNECTED: | |
1327 | /* Accept only SYN message */ | |
1328 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1329 | retval = TIPC_OK; | |
1330 | break; | |
1331 | case SS_DISCONNECTING: | |
1332 | break; | |
1333 | default: | |
1334 | pr_err("Unknown socket state %u\n", sock->state); | |
1335 | } | |
1336 | return retval; | |
1337 | } | |
1338 | ||
aba79f33 YX |
1339 | /** |
1340 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1341 | * @sk: socket | |
1342 | * @buf: message | |
1343 | * | |
1344 | * For all connection oriented messages, irrespective of importance, | |
1345 | * the default overload value (i.e. 67MB) is set as limit. | |
1346 | * | |
1347 | * For all connectionless messages, by default new queue limits are | |
1348 | * as belows: | |
1349 | * | |
cc79dd1b YX |
1350 | * TIPC_LOW_IMPORTANCE (4 MB) |
1351 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1352 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1353 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1354 | * |
1355 | * Returns overload limit according to corresponding message importance | |
1356 | */ | |
1357 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1358 | { | |
1359 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1360 | |
1361 | if (msg_connected(msg)) | |
0cee6bbe | 1362 | return sysctl_tipc_rmem[2]; |
1363 | ||
1364 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1365 | msg_importance(msg); | |
aba79f33 YX |
1366 | } |
1367 | ||
c4307285 | 1368 | /** |
0c3141e9 AS |
1369 | * filter_rcv - validate incoming message |
1370 | * @sk: socket | |
b97bf3fd | 1371 | * @buf: message |
c4307285 | 1372 | * |
0c3141e9 AS |
1373 | * Enqueues message on receive queue if acceptable; optionally handles |
1374 | * disconnect indication for a connected socket. | |
1375 | * | |
1376 | * Called with socket lock already taken; port lock may also be taken. | |
c4307285 | 1377 | * |
b97bf3fd PL |
1378 | * Returns TIPC error status code (TIPC_OK if message is not to be rejected) |
1379 | */ | |
0c3141e9 | 1380 | static u32 filter_rcv(struct sock *sk, struct sk_buff *buf) |
b97bf3fd | 1381 | { |
0c3141e9 | 1382 | struct socket *sock = sk->sk_socket; |
b97bf3fd | 1383 | struct tipc_msg *msg = buf_msg(buf); |
aba79f33 | 1384 | unsigned int limit = rcvbuf_limit(sk, buf); |
7e6c131e | 1385 | u32 res = TIPC_OK; |
b97bf3fd | 1386 | |
b97bf3fd | 1387 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 AS |
1388 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
1389 | return TIPC_ERR_NO_PORT; | |
0c3141e9 | 1390 | |
b97bf3fd | 1391 | if (sock->state == SS_READY) { |
b29f1428 | 1392 | if (msg_connected(msg)) |
b97bf3fd | 1393 | return TIPC_ERR_NO_PORT; |
b97bf3fd | 1394 | } else { |
8826cde6 | 1395 | res = filter_connect(tipc_sk_port(sk), &buf); |
7e6c131e YX |
1396 | if (res != TIPC_OK || buf == NULL) |
1397 | return res; | |
b97bf3fd PL |
1398 | } |
1399 | ||
1400 | /* Reject message if there isn't room to queue it */ | |
aba79f33 YX |
1401 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
1402 | return TIPC_ERR_OVERLOAD; | |
b97bf3fd | 1403 | |
aba79f33 | 1404 | /* Enqueue message */ |
40682432 | 1405 | TIPC_SKB_CB(buf)->handle = NULL; |
0c3141e9 | 1406 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
aba79f33 | 1407 | skb_set_owner_r(buf, sk); |
0c3141e9 | 1408 | |
f288bef4 | 1409 | sk->sk_data_ready(sk, 0); |
0c3141e9 AS |
1410 | return TIPC_OK; |
1411 | } | |
b97bf3fd | 1412 | |
0c3141e9 AS |
1413 | /** |
1414 | * backlog_rcv - handle incoming message from backlog queue | |
1415 | * @sk: socket | |
1416 | * @buf: message | |
1417 | * | |
1418 | * Caller must hold socket lock, but not port lock. | |
1419 | * | |
1420 | * Returns 0 | |
1421 | */ | |
0c3141e9 AS |
1422 | static int backlog_rcv(struct sock *sk, struct sk_buff *buf) |
1423 | { | |
1424 | u32 res; | |
1425 | ||
1426 | res = filter_rcv(sk, buf); | |
1427 | if (res) | |
1428 | tipc_reject_msg(buf, res); | |
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | /** | |
1433 | * dispatch - handle incoming message | |
1434 | * @tport: TIPC port that received message | |
1435 | * @buf: message | |
1436 | * | |
1437 | * Called with port lock already taken. | |
1438 | * | |
1439 | * Returns TIPC error status code (TIPC_OK if message is not to be rejected) | |
1440 | */ | |
8826cde6 | 1441 | static u32 dispatch(struct tipc_port *port, struct sk_buff *buf) |
0c3141e9 | 1442 | { |
8826cde6 | 1443 | struct sock *sk = tipc_port_to_sk(port); |
0c3141e9 AS |
1444 | u32 res; |
1445 | ||
1446 | /* | |
1447 | * Process message if socket is unlocked; otherwise add to backlog queue | |
1448 | * | |
1449 | * This code is based on sk_receive_skb(), but must be distinct from it | |
1450 | * since a TIPC-specific filter/reject mechanism is utilized | |
1451 | */ | |
0c3141e9 AS |
1452 | bh_lock_sock(sk); |
1453 | if (!sock_owned_by_user(sk)) { | |
1454 | res = filter_rcv(sk, buf); | |
1455 | } else { | |
aba79f33 | 1456 | if (sk_add_backlog(sk, buf, rcvbuf_limit(sk, buf))) |
53eecb1b ZY |
1457 | res = TIPC_ERR_OVERLOAD; |
1458 | else | |
1459 | res = TIPC_OK; | |
0c3141e9 AS |
1460 | } |
1461 | bh_unlock_sock(sk); | |
1462 | ||
1463 | return res; | |
b97bf3fd PL |
1464 | } |
1465 | ||
c4307285 | 1466 | /** |
b97bf3fd PL |
1467 | * wakeupdispatch - wake up port after congestion |
1468 | * @tport: port to wakeup | |
c4307285 | 1469 | * |
0c3141e9 | 1470 | * Called with port lock already taken. |
b97bf3fd | 1471 | */ |
8826cde6 | 1472 | static void wakeupdispatch(struct tipc_port *port) |
b97bf3fd | 1473 | { |
8826cde6 | 1474 | struct sock *sk = tipc_port_to_sk(port); |
f288bef4 | 1475 | sk->sk_write_space(sk); |
b97bf3fd PL |
1476 | } |
1477 | ||
78eb3a53 YX |
1478 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1479 | { | |
1480 | struct sock *sk = sock->sk; | |
1481 | DEFINE_WAIT(wait); | |
1482 | int done; | |
1483 | ||
1484 | do { | |
1485 | int err = sock_error(sk); | |
1486 | if (err) | |
1487 | return err; | |
1488 | if (!*timeo_p) | |
1489 | return -ETIMEDOUT; | |
1490 | if (signal_pending(current)) | |
1491 | return sock_intr_errno(*timeo_p); | |
1492 | ||
1493 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1494 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1495 | finish_wait(sk_sleep(sk), &wait); | |
1496 | } while (!done); | |
1497 | return 0; | |
1498 | } | |
1499 | ||
b97bf3fd | 1500 | /** |
247f0f3c | 1501 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1502 | * @sock: socket structure |
1503 | * @dest: socket address for destination port | |
1504 | * @destlen: size of socket address data structure | |
0c3141e9 | 1505 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1506 | * |
1507 | * Returns 0 on success, errno otherwise | |
1508 | */ | |
247f0f3c YX |
1509 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1510 | int destlen, int flags) | |
b97bf3fd | 1511 | { |
0c3141e9 | 1512 | struct sock *sk = sock->sk; |
b89741a0 AS |
1513 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1514 | struct msghdr m = {NULL,}; | |
78eb3a53 YX |
1515 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
1516 | socket_state previous; | |
b89741a0 AS |
1517 | int res; |
1518 | ||
0c3141e9 AS |
1519 | lock_sock(sk); |
1520 | ||
b89741a0 | 1521 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
0c3141e9 AS |
1522 | if (sock->state == SS_READY) { |
1523 | res = -EOPNOTSUPP; | |
1524 | goto exit; | |
1525 | } | |
b89741a0 | 1526 | |
b89741a0 AS |
1527 | /* |
1528 | * Reject connection attempt using multicast address | |
1529 | * | |
1530 | * Note: send_msg() validates the rest of the address fields, | |
1531 | * so there's no need to do it here | |
1532 | */ | |
0c3141e9 AS |
1533 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1534 | res = -EINVAL; | |
1535 | goto exit; | |
1536 | } | |
1537 | ||
78eb3a53 | 1538 | previous = sock->state; |
584d24b3 YX |
1539 | switch (sock->state) { |
1540 | case SS_UNCONNECTED: | |
1541 | /* Send a 'SYN-' to destination */ | |
1542 | m.msg_name = dest; | |
1543 | m.msg_namelen = destlen; | |
1544 | ||
1545 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1546 | * indicate send_msg() is never blocked. | |
1547 | */ | |
1548 | if (!timeout) | |
1549 | m.msg_flags = MSG_DONTWAIT; | |
1550 | ||
247f0f3c | 1551 | res = tipc_sendmsg(NULL, sock, &m, 0); |
584d24b3 YX |
1552 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1553 | goto exit; | |
1554 | ||
1555 | /* Just entered SS_CONNECTING state; the only | |
1556 | * difference is that return value in non-blocking | |
1557 | * case is EINPROGRESS, rather than EALREADY. | |
1558 | */ | |
1559 | res = -EINPROGRESS; | |
584d24b3 | 1560 | case SS_CONNECTING: |
78eb3a53 YX |
1561 | if (previous == SS_CONNECTING) |
1562 | res = -EALREADY; | |
1563 | if (!timeout) | |
1564 | goto exit; | |
1565 | timeout = msecs_to_jiffies(timeout); | |
1566 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1567 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1568 | break; |
1569 | case SS_CONNECTED: | |
1570 | res = -EISCONN; | |
1571 | break; | |
1572 | default: | |
1573 | res = -EINVAL; | |
78eb3a53 | 1574 | break; |
b89741a0 | 1575 | } |
0c3141e9 AS |
1576 | exit: |
1577 | release_sock(sk); | |
b89741a0 | 1578 | return res; |
b97bf3fd PL |
1579 | } |
1580 | ||
c4307285 | 1581 | /** |
247f0f3c | 1582 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1583 | * @sock: socket structure |
1584 | * @len: (unused) | |
c4307285 | 1585 | * |
b97bf3fd PL |
1586 | * Returns 0 on success, errno otherwise |
1587 | */ | |
247f0f3c | 1588 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1589 | { |
0c3141e9 AS |
1590 | struct sock *sk = sock->sk; |
1591 | int res; | |
1592 | ||
1593 | lock_sock(sk); | |
b97bf3fd | 1594 | |
245f3d34 | 1595 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1596 | res = -EINVAL; |
1597 | else { | |
1598 | sock->state = SS_LISTENING; | |
1599 | res = 0; | |
1600 | } | |
1601 | ||
1602 | release_sock(sk); | |
1603 | return res; | |
b97bf3fd PL |
1604 | } |
1605 | ||
6398e23c YX |
1606 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1607 | { | |
1608 | struct sock *sk = sock->sk; | |
1609 | DEFINE_WAIT(wait); | |
1610 | int err; | |
1611 | ||
1612 | /* True wake-one mechanism for incoming connections: only | |
1613 | * one process gets woken up, not the 'whole herd'. | |
1614 | * Since we do not 'race & poll' for established sockets | |
1615 | * anymore, the common case will execute the loop only once. | |
1616 | */ | |
1617 | for (;;) { | |
1618 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1619 | TASK_INTERRUPTIBLE); | |
1620 | if (skb_queue_empty(&sk->sk_receive_queue)) { | |
1621 | release_sock(sk); | |
1622 | timeo = schedule_timeout(timeo); | |
1623 | lock_sock(sk); | |
1624 | } | |
1625 | err = 0; | |
1626 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1627 | break; | |
1628 | err = -EINVAL; | |
1629 | if (sock->state != SS_LISTENING) | |
1630 | break; | |
1631 | err = sock_intr_errno(timeo); | |
1632 | if (signal_pending(current)) | |
1633 | break; | |
1634 | err = -EAGAIN; | |
1635 | if (!timeo) | |
1636 | break; | |
1637 | } | |
1638 | finish_wait(sk_sleep(sk), &wait); | |
1639 | return err; | |
1640 | } | |
1641 | ||
c4307285 | 1642 | /** |
247f0f3c | 1643 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1644 | * @sock: listening socket |
1645 | * @newsock: new socket that is to be connected | |
1646 | * @flags: file-related flags associated with socket | |
c4307285 | 1647 | * |
b97bf3fd PL |
1648 | * Returns 0 on success, errno otherwise |
1649 | */ | |
247f0f3c | 1650 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1651 | { |
0fef8f20 | 1652 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1653 | struct sk_buff *buf; |
8826cde6 | 1654 | struct tipc_port *new_port; |
0fef8f20 | 1655 | struct tipc_msg *msg; |
f9fef18c | 1656 | struct tipc_portid peer; |
0fef8f20 | 1657 | u32 new_ref; |
6398e23c | 1658 | long timeo; |
0c3141e9 | 1659 | int res; |
b97bf3fd | 1660 | |
0c3141e9 | 1661 | lock_sock(sk); |
b97bf3fd | 1662 | |
0c3141e9 AS |
1663 | if (sock->state != SS_LISTENING) { |
1664 | res = -EINVAL; | |
b97bf3fd PL |
1665 | goto exit; |
1666 | } | |
6398e23c YX |
1667 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1668 | res = tipc_wait_for_accept(sock, timeo); | |
1669 | if (res) | |
1670 | goto exit; | |
0c3141e9 AS |
1671 | |
1672 | buf = skb_peek(&sk->sk_receive_queue); | |
1673 | ||
c5fa7b3c | 1674 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
1675 | if (res) |
1676 | goto exit; | |
b97bf3fd | 1677 | |
0fef8f20 | 1678 | new_sk = new_sock->sk; |
8826cde6 JPM |
1679 | new_port = tipc_sk_port(new_sk); |
1680 | new_ref = new_port->ref; | |
0fef8f20 | 1681 | msg = buf_msg(buf); |
b97bf3fd | 1682 | |
0fef8f20 PG |
1683 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
1684 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
1685 | ||
1686 | /* | |
1687 | * Reject any stray messages received by new socket | |
1688 | * before the socket lock was taken (very, very unlikely) | |
1689 | */ | |
1690 | reject_rx_queue(new_sk); | |
1691 | ||
1692 | /* Connect new socket to it's peer */ | |
f9fef18c JPM |
1693 | peer.ref = msg_origport(msg); |
1694 | peer.node = msg_orignode(msg); | |
1695 | tipc_port_connect(new_ref, &peer); | |
0fef8f20 PG |
1696 | new_sock->state = SS_CONNECTED; |
1697 | ||
1698 | tipc_set_portimportance(new_ref, msg_importance(msg)); | |
1699 | if (msg_named(msg)) { | |
8826cde6 JPM |
1700 | new_port->conn_type = msg_nametype(msg); |
1701 | new_port->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 1702 | } |
0fef8f20 PG |
1703 | |
1704 | /* | |
1705 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
1706 | * Respond to 'SYN+' by queuing it on new socket. | |
1707 | */ | |
1708 | if (!msg_data_sz(msg)) { | |
1709 | struct msghdr m = {NULL,}; | |
1710 | ||
1711 | advance_rx_queue(sk); | |
247f0f3c | 1712 | tipc_send_packet(NULL, new_sock, &m, 0); |
0fef8f20 PG |
1713 | } else { |
1714 | __skb_dequeue(&sk->sk_receive_queue); | |
1715 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 1716 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
1717 | } |
1718 | release_sock(new_sk); | |
b97bf3fd | 1719 | exit: |
0c3141e9 | 1720 | release_sock(sk); |
b97bf3fd PL |
1721 | return res; |
1722 | } | |
1723 | ||
1724 | /** | |
247f0f3c | 1725 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 1726 | * @sock: socket structure |
e247a8f5 | 1727 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
1728 | * |
1729 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 1730 | * |
b97bf3fd PL |
1731 | * Returns 0 on success, errno otherwise |
1732 | */ | |
247f0f3c | 1733 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 1734 | { |
0c3141e9 AS |
1735 | struct sock *sk = sock->sk; |
1736 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
1737 | struct sk_buff *buf; |
1738 | int res; | |
1739 | ||
e247a8f5 AS |
1740 | if (how != SHUT_RDWR) |
1741 | return -EINVAL; | |
b97bf3fd | 1742 | |
0c3141e9 | 1743 | lock_sock(sk); |
b97bf3fd PL |
1744 | |
1745 | switch (sock->state) { | |
0c3141e9 | 1746 | case SS_CONNECTING: |
b97bf3fd PL |
1747 | case SS_CONNECTED: |
1748 | ||
b97bf3fd | 1749 | restart: |
617d3c7a | 1750 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
0c3141e9 AS |
1751 | buf = __skb_dequeue(&sk->sk_receive_queue); |
1752 | if (buf) { | |
40682432 | 1753 | if (TIPC_SKB_CB(buf)->handle != NULL) { |
5f6d9123 | 1754 | kfree_skb(buf); |
b97bf3fd PL |
1755 | goto restart; |
1756 | } | |
247f0f3c | 1757 | tipc_port_disconnect(tport->ref); |
b97bf3fd | 1758 | tipc_reject_msg(buf, TIPC_CONN_SHUTDOWN); |
0c3141e9 | 1759 | } else { |
247f0f3c | 1760 | tipc_port_shutdown(tport->ref); |
b97bf3fd | 1761 | } |
0c3141e9 AS |
1762 | |
1763 | sock->state = SS_DISCONNECTING; | |
b97bf3fd PL |
1764 | |
1765 | /* fall through */ | |
1766 | ||
1767 | case SS_DISCONNECTING: | |
1768 | ||
75031151 | 1769 | /* Discard any unreceived messages */ |
57467e56 | 1770 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
1771 | |
1772 | /* Wake up anyone sleeping in poll */ | |
1773 | sk->sk_state_change(sk); | |
b97bf3fd PL |
1774 | res = 0; |
1775 | break; | |
1776 | ||
1777 | default: | |
1778 | res = -ENOTCONN; | |
1779 | } | |
1780 | ||
0c3141e9 | 1781 | release_sock(sk); |
b97bf3fd PL |
1782 | return res; |
1783 | } | |
1784 | ||
1785 | /** | |
247f0f3c | 1786 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
1787 | * @sock: socket structure |
1788 | * @lvl: option level | |
1789 | * @opt: option identifier | |
1790 | * @ov: pointer to new option value | |
1791 | * @ol: length of option value | |
c4307285 YH |
1792 | * |
1793 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 1794 | * (to ease compatibility). |
c4307285 | 1795 | * |
b97bf3fd PL |
1796 | * Returns 0 on success, errno otherwise |
1797 | */ | |
247f0f3c YX |
1798 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
1799 | char __user *ov, unsigned int ol) | |
b97bf3fd | 1800 | { |
0c3141e9 AS |
1801 | struct sock *sk = sock->sk; |
1802 | struct tipc_port *tport = tipc_sk_port(sk); | |
b97bf3fd PL |
1803 | u32 value; |
1804 | int res; | |
1805 | ||
c4307285 YH |
1806 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
1807 | return 0; | |
b97bf3fd PL |
1808 | if (lvl != SOL_TIPC) |
1809 | return -ENOPROTOOPT; | |
1810 | if (ol < sizeof(value)) | |
1811 | return -EINVAL; | |
2db9983a AS |
1812 | res = get_user(value, (u32 __user *)ov); |
1813 | if (res) | |
b97bf3fd PL |
1814 | return res; |
1815 | ||
0c3141e9 | 1816 | lock_sock(sk); |
c4307285 | 1817 | |
b97bf3fd PL |
1818 | switch (opt) { |
1819 | case TIPC_IMPORTANCE: | |
0c3141e9 | 1820 | res = tipc_set_portimportance(tport->ref, value); |
b97bf3fd PL |
1821 | break; |
1822 | case TIPC_SRC_DROPPABLE: | |
1823 | if (sock->type != SOCK_STREAM) | |
0c3141e9 | 1824 | res = tipc_set_portunreliable(tport->ref, value); |
c4307285 | 1825 | else |
b97bf3fd PL |
1826 | res = -ENOPROTOOPT; |
1827 | break; | |
1828 | case TIPC_DEST_DROPPABLE: | |
0c3141e9 | 1829 | res = tipc_set_portunreturnable(tport->ref, value); |
b97bf3fd PL |
1830 | break; |
1831 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 1832 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 1833 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
1834 | break; |
1835 | default: | |
1836 | res = -EINVAL; | |
1837 | } | |
1838 | ||
0c3141e9 AS |
1839 | release_sock(sk); |
1840 | ||
b97bf3fd PL |
1841 | return res; |
1842 | } | |
1843 | ||
1844 | /** | |
247f0f3c | 1845 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
1846 | * @sock: socket structure |
1847 | * @lvl: option level | |
1848 | * @opt: option identifier | |
1849 | * @ov: receptacle for option value | |
1850 | * @ol: receptacle for length of option value | |
c4307285 YH |
1851 | * |
1852 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 1853 | * (to ease compatibility). |
c4307285 | 1854 | * |
b97bf3fd PL |
1855 | * Returns 0 on success, errno otherwise |
1856 | */ | |
247f0f3c YX |
1857 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
1858 | char __user *ov, int __user *ol) | |
b97bf3fd | 1859 | { |
0c3141e9 AS |
1860 | struct sock *sk = sock->sk; |
1861 | struct tipc_port *tport = tipc_sk_port(sk); | |
c4307285 | 1862 | int len; |
b97bf3fd | 1863 | u32 value; |
c4307285 | 1864 | int res; |
b97bf3fd | 1865 | |
c4307285 YH |
1866 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
1867 | return put_user(0, ol); | |
b97bf3fd PL |
1868 | if (lvl != SOL_TIPC) |
1869 | return -ENOPROTOOPT; | |
2db9983a AS |
1870 | res = get_user(len, ol); |
1871 | if (res) | |
c4307285 | 1872 | return res; |
b97bf3fd | 1873 | |
0c3141e9 | 1874 | lock_sock(sk); |
b97bf3fd PL |
1875 | |
1876 | switch (opt) { | |
1877 | case TIPC_IMPORTANCE: | |
0c3141e9 | 1878 | res = tipc_portimportance(tport->ref, &value); |
b97bf3fd PL |
1879 | break; |
1880 | case TIPC_SRC_DROPPABLE: | |
0c3141e9 | 1881 | res = tipc_portunreliable(tport->ref, &value); |
b97bf3fd PL |
1882 | break; |
1883 | case TIPC_DEST_DROPPABLE: | |
0c3141e9 | 1884 | res = tipc_portunreturnable(tport->ref, &value); |
b97bf3fd PL |
1885 | break; |
1886 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 1887 | value = tipc_sk(sk)->conn_timeout; |
0c3141e9 | 1888 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 1889 | break; |
0e65967e | 1890 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 1891 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 1892 | break; |
0e65967e | 1893 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 1894 | value = skb_queue_len(&sk->sk_receive_queue); |
1895 | break; | |
b97bf3fd PL |
1896 | default: |
1897 | res = -EINVAL; | |
1898 | } | |
1899 | ||
0c3141e9 AS |
1900 | release_sock(sk); |
1901 | ||
25860c3b PG |
1902 | if (res) |
1903 | return res; /* "get" failed */ | |
b97bf3fd | 1904 | |
25860c3b PG |
1905 | if (len < sizeof(value)) |
1906 | return -EINVAL; | |
1907 | ||
1908 | if (copy_to_user(ov, &value, sizeof(value))) | |
1909 | return -EFAULT; | |
1910 | ||
1911 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
1912 | } |
1913 | ||
ae86b9e3 BH |
1914 | /* Protocol switches for the various types of TIPC sockets */ |
1915 | ||
bca65eae | 1916 | static const struct proto_ops msg_ops = { |
0e65967e | 1917 | .owner = THIS_MODULE, |
b97bf3fd | 1918 | .family = AF_TIPC, |
247f0f3c YX |
1919 | .release = tipc_release, |
1920 | .bind = tipc_bind, | |
1921 | .connect = tipc_connect, | |
5eee6a6d | 1922 | .socketpair = sock_no_socketpair, |
245f3d34 | 1923 | .accept = sock_no_accept, |
247f0f3c YX |
1924 | .getname = tipc_getname, |
1925 | .poll = tipc_poll, | |
5eee6a6d | 1926 | .ioctl = sock_no_ioctl, |
245f3d34 | 1927 | .listen = sock_no_listen, |
247f0f3c YX |
1928 | .shutdown = tipc_shutdown, |
1929 | .setsockopt = tipc_setsockopt, | |
1930 | .getsockopt = tipc_getsockopt, | |
1931 | .sendmsg = tipc_sendmsg, | |
1932 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
1933 | .mmap = sock_no_mmap, |
1934 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
1935 | }; |
1936 | ||
bca65eae | 1937 | static const struct proto_ops packet_ops = { |
0e65967e | 1938 | .owner = THIS_MODULE, |
b97bf3fd | 1939 | .family = AF_TIPC, |
247f0f3c YX |
1940 | .release = tipc_release, |
1941 | .bind = tipc_bind, | |
1942 | .connect = tipc_connect, | |
5eee6a6d | 1943 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
1944 | .accept = tipc_accept, |
1945 | .getname = tipc_getname, | |
1946 | .poll = tipc_poll, | |
5eee6a6d | 1947 | .ioctl = sock_no_ioctl, |
247f0f3c YX |
1948 | .listen = tipc_listen, |
1949 | .shutdown = tipc_shutdown, | |
1950 | .setsockopt = tipc_setsockopt, | |
1951 | .getsockopt = tipc_getsockopt, | |
1952 | .sendmsg = tipc_send_packet, | |
1953 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
1954 | .mmap = sock_no_mmap, |
1955 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
1956 | }; |
1957 | ||
bca65eae | 1958 | static const struct proto_ops stream_ops = { |
0e65967e | 1959 | .owner = THIS_MODULE, |
b97bf3fd | 1960 | .family = AF_TIPC, |
247f0f3c YX |
1961 | .release = tipc_release, |
1962 | .bind = tipc_bind, | |
1963 | .connect = tipc_connect, | |
5eee6a6d | 1964 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
1965 | .accept = tipc_accept, |
1966 | .getname = tipc_getname, | |
1967 | .poll = tipc_poll, | |
5eee6a6d | 1968 | .ioctl = sock_no_ioctl, |
247f0f3c YX |
1969 | .listen = tipc_listen, |
1970 | .shutdown = tipc_shutdown, | |
1971 | .setsockopt = tipc_setsockopt, | |
1972 | .getsockopt = tipc_getsockopt, | |
1973 | .sendmsg = tipc_send_stream, | |
1974 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
1975 | .mmap = sock_no_mmap, |
1976 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
1977 | }; |
1978 | ||
bca65eae | 1979 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 1980 | .owner = THIS_MODULE, |
b97bf3fd | 1981 | .family = AF_TIPC, |
c5fa7b3c | 1982 | .create = tipc_sk_create |
b97bf3fd PL |
1983 | }; |
1984 | ||
1985 | static struct proto tipc_proto = { | |
1986 | .name = "TIPC", | |
1987 | .owner = THIS_MODULE, | |
cc79dd1b YX |
1988 | .obj_size = sizeof(struct tipc_sock), |
1989 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
1990 | }; |
1991 | ||
c5fa7b3c YX |
1992 | static struct proto tipc_proto_kern = { |
1993 | .name = "TIPC", | |
1994 | .obj_size = sizeof(struct tipc_sock), | |
1995 | .sysctl_rmem = sysctl_tipc_rmem | |
1996 | }; | |
1997 | ||
b97bf3fd | 1998 | /** |
4323add6 | 1999 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2000 | * |
b97bf3fd PL |
2001 | * Returns 0 on success, errno otherwise |
2002 | */ | |
4323add6 | 2003 | int tipc_socket_init(void) |
b97bf3fd PL |
2004 | { |
2005 | int res; | |
2006 | ||
c4307285 | 2007 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2008 | if (res) { |
2cf8aa19 | 2009 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2010 | goto out; |
2011 | } | |
2012 | ||
2013 | res = sock_register(&tipc_family_ops); | |
2014 | if (res) { | |
2cf8aa19 | 2015 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2016 | proto_unregister(&tipc_proto); |
2017 | goto out; | |
2018 | } | |
b97bf3fd PL |
2019 | out: |
2020 | return res; | |
2021 | } | |
2022 | ||
2023 | /** | |
4323add6 | 2024 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2025 | */ |
4323add6 | 2026 | void tipc_socket_stop(void) |
b97bf3fd | 2027 | { |
b97bf3fd PL |
2028 | sock_unregister(tipc_family_ops.family); |
2029 | proto_unregister(&tipc_proto); | |
2030 | } |