]>
Commit | Line | Data |
---|---|---|
b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
8826cde6 | 4 | * Copyright (c) 2001-2007, 2012-2014, Ericsson AB |
c5fa7b3c | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
07f6c4bc YX |
37 | #include <linux/rhashtable.h> |
38 | #include <linux/jhash.h> | |
b97bf3fd | 39 | #include "core.h" |
e2dafe87 | 40 | #include "name_table.h" |
78acb1f9 | 41 | #include "node.h" |
e2dafe87 | 42 | #include "link.h" |
5a9ee0be | 43 | #include "config.h" |
2e84c60b | 44 | #include "socket.h" |
2cf8aa19 | 45 | |
07f6c4bc YX |
46 | #define SS_LISTENING -1 /* socket is listening */ |
47 | #define SS_READY -2 /* socket is connectionless */ | |
b97bf3fd | 48 | |
07f6c4bc | 49 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
2f55c437 | 50 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc YX |
51 | #define TIPC_FWD_MSG 1 |
52 | #define TIPC_CONN_OK 0 | |
53 | #define TIPC_CONN_PROBING 1 | |
54 | #define TIPC_MAX_PORT 0xffffffff | |
55 | #define TIPC_MIN_PORT 1 | |
301bae56 JPM |
56 | |
57 | /** | |
58 | * struct tipc_sock - TIPC socket structure | |
59 | * @sk: socket - interacts with 'port' and with user via the socket API | |
60 | * @connected: non-zero if port is currently connected to a peer port | |
61 | * @conn_type: TIPC type used when connection was established | |
62 | * @conn_instance: TIPC instance used when connection was established | |
63 | * @published: non-zero if port has one or more associated names | |
64 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 65 | * @portid: unique port identity in TIPC socket hash table |
301bae56 JPM |
66 | * @phdr: preformatted message header used when sending messages |
67 | * @port_list: adjacent ports in TIPC's global list of ports | |
68 | * @publications: list of publications for port | |
69 | * @pub_count: total # of publications port has made during its lifetime | |
70 | * @probing_state: | |
2f55c437 | 71 | * @probing_intv: |
301bae56 JPM |
72 | * @timer: |
73 | * @port: port - interacts with 'sk' and with the rest of the TIPC stack | |
74 | * @peer_name: the peer of the connection, if any | |
75 | * @conn_timeout: the time we can wait for an unresponded setup request | |
76 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
77 | * @link_cong: non-zero if owner must sleep because of link congestion | |
78 | * @sent_unacked: # messages sent by socket, and not yet acked by peer | |
79 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
07f6c4bc YX |
80 | * @node: hash table node |
81 | * @rcu: rcu struct for tipc_sock | |
301bae56 JPM |
82 | */ |
83 | struct tipc_sock { | |
84 | struct sock sk; | |
85 | int connected; | |
86 | u32 conn_type; | |
87 | u32 conn_instance; | |
88 | int published; | |
89 | u32 max_pkt; | |
07f6c4bc | 90 | u32 portid; |
301bae56 JPM |
91 | struct tipc_msg phdr; |
92 | struct list_head sock_list; | |
93 | struct list_head publications; | |
94 | u32 pub_count; | |
95 | u32 probing_state; | |
2f55c437 | 96 | unsigned long probing_intv; |
301bae56 JPM |
97 | struct timer_list timer; |
98 | uint conn_timeout; | |
99 | atomic_t dupl_rcvcnt; | |
100 | bool link_cong; | |
101 | uint sent_unacked; | |
102 | uint rcv_unacked; | |
07f6c4bc YX |
103 | struct rhash_head node; |
104 | struct rcu_head rcu; | |
301bae56 | 105 | }; |
b97bf3fd | 106 | |
4f4482dc | 107 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 108 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 109 | static void tipc_write_space(struct sock *sk); |
247f0f3c YX |
110 | static int tipc_release(struct socket *sock); |
111 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 112 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
07f6c4bc | 113 | static void tipc_sk_timeout(unsigned long portid); |
301bae56 | 114 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 115 | struct tipc_name_seq const *seq); |
301bae56 | 116 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 117 | struct tipc_name_seq const *seq); |
07f6c4bc YX |
118 | static struct tipc_sock *tipc_sk_lookup(u32 portid); |
119 | static int tipc_sk_insert(struct tipc_sock *tsk); | |
120 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
b97bf3fd | 121 | |
bca65eae FW |
122 | static const struct proto_ops packet_ops; |
123 | static const struct proto_ops stream_ops; | |
124 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
125 | |
126 | static struct proto tipc_proto; | |
c5fa7b3c | 127 | static struct proto tipc_proto_kern; |
b97bf3fd | 128 | |
1a1a143d RA |
129 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
130 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, | |
131 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, | |
132 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, | |
133 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, | |
134 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } | |
135 | }; | |
136 | ||
c4307285 | 137 | /* |
0c3141e9 AS |
138 | * Revised TIPC socket locking policy: |
139 | * | |
140 | * Most socket operations take the standard socket lock when they start | |
141 | * and hold it until they finish (or until they need to sleep). Acquiring | |
142 | * this lock grants the owner exclusive access to the fields of the socket | |
143 | * data structures, with the exception of the backlog queue. A few socket | |
144 | * operations can be done without taking the socket lock because they only | |
145 | * read socket information that never changes during the life of the socket. | |
146 | * | |
147 | * Socket operations may acquire the lock for the associated TIPC port if they | |
148 | * need to perform an operation on the port. If any routine needs to acquire | |
149 | * both the socket lock and the port lock it must take the socket lock first | |
150 | * to avoid the risk of deadlock. | |
151 | * | |
152 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
153 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
154 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
155 | * and either handles the message itself or adds it to the socket's backlog | |
156 | * queue; in the latter case the queued message is processed once the process | |
157 | * owning the socket lock releases it. | |
158 | * | |
159 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
160 | * the problem of a blocked socket operation preventing any other operations | |
161 | * from occurring. However, applications must be careful if they have | |
162 | * multiple threads trying to send (or receive) on the same socket, as these | |
163 | * operations might interfere with each other. For example, doing a connect | |
164 | * and a receive at the same time might allow the receive to consume the | |
165 | * ACK message meant for the connect. While additional work could be done | |
166 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
167 | * | |
168 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
169 | * that another operation that must be performed in a non-blocking manner is | |
170 | * not delayed for very long because the lock has already been taken. | |
171 | * | |
172 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
173 | * constant over its lifetime; such fields can be examined without taking | |
174 | * the socket lock and/or port lock, and do not need to be re-read even | |
175 | * after resuming processing after waiting. These fields include: | |
176 | * - socket type | |
177 | * - pointer to socket sk structure (aka tipc_sock structure) | |
178 | * - pointer to port structure | |
179 | * - port reference | |
180 | */ | |
181 | ||
07f6c4bc YX |
182 | /* Protects tipc socket hash table mutations */ |
183 | static struct rhashtable tipc_sk_rht; | |
184 | ||
301bae56 | 185 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 186 | { |
301bae56 | 187 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
188 | } |
189 | ||
301bae56 | 190 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 191 | { |
301bae56 | 192 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
193 | } |
194 | ||
301bae56 | 195 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 196 | { |
301bae56 | 197 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
198 | } |
199 | ||
301bae56 | 200 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 201 | { |
301bae56 | 202 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
203 | } |
204 | ||
301bae56 | 205 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 206 | { |
301bae56 | 207 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
208 | } |
209 | ||
301bae56 | 210 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 211 | { |
301bae56 | 212 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
213 | } |
214 | ||
301bae56 | 215 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 216 | { |
301bae56 | 217 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
218 | } |
219 | ||
301bae56 | 220 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
221 | { |
222 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
223 | return -EINVAL; | |
301bae56 | 224 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
225 | return 0; |
226 | } | |
8826cde6 | 227 | |
301bae56 JPM |
228 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
229 | { | |
230 | return container_of(sk, struct tipc_sock, sk); | |
231 | } | |
232 | ||
233 | static int tsk_conn_cong(struct tipc_sock *tsk) | |
234 | { | |
235 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; | |
236 | } | |
237 | ||
0c3141e9 | 238 | /** |
2e84c60b | 239 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
240 | * |
241 | * Caller must hold socket lock | |
b97bf3fd | 242 | */ |
2e84c60b | 243 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 244 | { |
5f6d9123 | 245 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
246 | } |
247 | ||
b97bf3fd | 248 | /** |
2e84c60b | 249 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
250 | * |
251 | * Caller must hold socket lock | |
b97bf3fd | 252 | */ |
2e84c60b | 253 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 254 | { |
a6ca1094 | 255 | struct sk_buff *skb; |
8db1bae3 | 256 | u32 dnode; |
0c3141e9 | 257 | |
a6ca1094 YX |
258 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) { |
259 | if (tipc_msg_reverse(skb, &dnode, TIPC_ERR_NO_PORT)) | |
260 | tipc_link_xmit_skb(skb, dnode, 0); | |
8db1bae3 | 261 | } |
b97bf3fd PL |
262 | } |
263 | ||
2e84c60b | 264 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
265 | * |
266 | * Handles cases where the node's network address has changed from | |
267 | * the default of <0.0.0> to its configured setting. | |
268 | */ | |
2e84c60b | 269 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 270 | { |
301bae56 | 271 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
272 | u32 orig_node; |
273 | u32 peer_node; | |
274 | ||
301bae56 | 275 | if (unlikely(!tsk->connected)) |
0fc87aae JPM |
276 | return false; |
277 | ||
278 | if (unlikely(msg_origport(msg) != peer_port)) | |
279 | return false; | |
280 | ||
281 | orig_node = msg_orignode(msg); | |
301bae56 | 282 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
283 | |
284 | if (likely(orig_node == peer_node)) | |
285 | return true; | |
286 | ||
287 | if (!orig_node && (peer_node == tipc_own_addr)) | |
288 | return true; | |
289 | ||
290 | if (!peer_node && (orig_node == tipc_own_addr)) | |
291 | return true; | |
292 | ||
293 | return false; | |
294 | } | |
295 | ||
b97bf3fd | 296 | /** |
c5fa7b3c | 297 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 298 | * @net: network namespace (must be default network) |
b97bf3fd PL |
299 | * @sock: pre-allocated socket structure |
300 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 301 | * @kern: caused by kernel or by userspace? |
c4307285 | 302 | * |
0c3141e9 AS |
303 | * This routine creates additional data structures used by the TIPC socket, |
304 | * initializes them, and links them together. | |
b97bf3fd PL |
305 | * |
306 | * Returns 0 on success, errno otherwise | |
307 | */ | |
58ed9442 JPM |
308 | static int tipc_sk_create(struct net *net, struct socket *sock, |
309 | int protocol, int kern) | |
b97bf3fd | 310 | { |
0c3141e9 AS |
311 | const struct proto_ops *ops; |
312 | socket_state state; | |
b97bf3fd | 313 | struct sock *sk; |
58ed9442 | 314 | struct tipc_sock *tsk; |
5b8fa7ce | 315 | struct tipc_msg *msg; |
0c3141e9 AS |
316 | |
317 | /* Validate arguments */ | |
b97bf3fd PL |
318 | if (unlikely(protocol != 0)) |
319 | return -EPROTONOSUPPORT; | |
320 | ||
b97bf3fd PL |
321 | switch (sock->type) { |
322 | case SOCK_STREAM: | |
0c3141e9 AS |
323 | ops = &stream_ops; |
324 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
325 | break; |
326 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
327 | ops = &packet_ops; |
328 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
329 | break; |
330 | case SOCK_DGRAM: | |
b97bf3fd | 331 | case SOCK_RDM: |
0c3141e9 AS |
332 | ops = &msg_ops; |
333 | state = SS_READY; | |
b97bf3fd | 334 | break; |
49978651 | 335 | default: |
49978651 | 336 | return -EPROTOTYPE; |
b97bf3fd PL |
337 | } |
338 | ||
0c3141e9 | 339 | /* Allocate socket's protocol area */ |
c5fa7b3c YX |
340 | if (!kern) |
341 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); | |
342 | else | |
343 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); | |
344 | ||
0c3141e9 | 345 | if (sk == NULL) |
b97bf3fd | 346 | return -ENOMEM; |
b97bf3fd | 347 | |
58ed9442 | 348 | tsk = tipc_sk(sk); |
301bae56 | 349 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
350 | INIT_LIST_HEAD(&tsk->publications); |
351 | msg = &tsk->phdr; | |
5b8fa7ce JPM |
352 | tipc_msg_init(msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, |
353 | NAMED_H_SIZE, 0); | |
b97bf3fd | 354 | |
0c3141e9 | 355 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
356 | sock->ops = ops; |
357 | sock->state = state; | |
0c3141e9 | 358 | sock_init_data(sock, sk); |
07f6c4bc YX |
359 | if (tipc_sk_insert(tsk)) { |
360 | pr_warn("Socket create failed; port numbrer exhausted\n"); | |
361 | return -EINVAL; | |
362 | } | |
363 | msg_set_origport(msg, tsk->portid); | |
2f55c437 | 364 | setup_timer(&tsk->timer, tipc_sk_timeout, tsk->portid); |
4f4482dc | 365 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 366 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
367 | sk->sk_data_ready = tipc_data_ready; |
368 | sk->sk_write_space = tipc_write_space; | |
4f4482dc | 369 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 370 | tsk->sent_unacked = 0; |
4f4482dc | 371 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 372 | |
0c3141e9 | 373 | if (sock->state == SS_READY) { |
301bae56 | 374 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 375 | if (sock->type == SOCK_DGRAM) |
301bae56 | 376 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 377 | } |
b97bf3fd PL |
378 | return 0; |
379 | } | |
380 | ||
c5fa7b3c YX |
381 | /** |
382 | * tipc_sock_create_local - create TIPC socket from inside TIPC module | |
383 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET | |
384 | * | |
385 | * We cannot use sock_creat_kern here because it bumps module user count. | |
386 | * Since socket owner and creator is the same module we must make sure | |
387 | * that module count remains zero for module local sockets, otherwise | |
388 | * we cannot do rmmod. | |
389 | * | |
390 | * Returns 0 on success, errno otherwise | |
391 | */ | |
392 | int tipc_sock_create_local(int type, struct socket **res) | |
393 | { | |
394 | int rc; | |
c5fa7b3c YX |
395 | |
396 | rc = sock_create_lite(AF_TIPC, type, 0, res); | |
397 | if (rc < 0) { | |
398 | pr_err("Failed to create kernel socket\n"); | |
399 | return rc; | |
400 | } | |
401 | tipc_sk_create(&init_net, *res, 0, 1); | |
402 | ||
c5fa7b3c YX |
403 | return 0; |
404 | } | |
405 | ||
406 | /** | |
407 | * tipc_sock_release_local - release socket created by tipc_sock_create_local | |
408 | * @sock: the socket to be released. | |
409 | * | |
410 | * Module reference count is not incremented when such sockets are created, | |
411 | * so we must keep it from being decremented when they are released. | |
412 | */ | |
413 | void tipc_sock_release_local(struct socket *sock) | |
414 | { | |
247f0f3c | 415 | tipc_release(sock); |
c5fa7b3c YX |
416 | sock->ops = NULL; |
417 | sock_release(sock); | |
418 | } | |
419 | ||
420 | /** | |
421 | * tipc_sock_accept_local - accept a connection on a socket created | |
422 | * with tipc_sock_create_local. Use this function to avoid that | |
423 | * module reference count is inadvertently incremented. | |
424 | * | |
425 | * @sock: the accepting socket | |
426 | * @newsock: reference to the new socket to be created | |
427 | * @flags: socket flags | |
428 | */ | |
429 | ||
430 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, | |
ae8509c4 | 431 | int flags) |
c5fa7b3c YX |
432 | { |
433 | struct sock *sk = sock->sk; | |
434 | int ret; | |
435 | ||
436 | ret = sock_create_lite(sk->sk_family, sk->sk_type, | |
437 | sk->sk_protocol, newsock); | |
438 | if (ret < 0) | |
439 | return ret; | |
440 | ||
247f0f3c | 441 | ret = tipc_accept(sock, *newsock, flags); |
c5fa7b3c YX |
442 | if (ret < 0) { |
443 | sock_release(*newsock); | |
444 | return ret; | |
445 | } | |
446 | (*newsock)->ops = sock->ops; | |
447 | return ret; | |
448 | } | |
449 | ||
07f6c4bc YX |
450 | static void tipc_sk_callback(struct rcu_head *head) |
451 | { | |
452 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
453 | ||
454 | sock_put(&tsk->sk); | |
455 | } | |
456 | ||
b97bf3fd | 457 | /** |
247f0f3c | 458 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
459 | * @sock: socket to destroy |
460 | * | |
461 | * This routine cleans up any messages that are still queued on the socket. | |
462 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
463 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
464 | * and any others are discarded. (If the first message on a STREAM socket | |
465 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 466 | * |
b97bf3fd PL |
467 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
468 | * are returned or discarded according to the "destination droppable" setting | |
469 | * specified for the message by the sender. | |
470 | * | |
471 | * Returns 0 on success, errno otherwise | |
472 | */ | |
247f0f3c | 473 | static int tipc_release(struct socket *sock) |
b97bf3fd | 474 | { |
b97bf3fd | 475 | struct sock *sk = sock->sk; |
58ed9442 | 476 | struct tipc_sock *tsk; |
a6ca1094 | 477 | struct sk_buff *skb; |
8db1bae3 | 478 | u32 dnode; |
b97bf3fd | 479 | |
0c3141e9 AS |
480 | /* |
481 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
482 | * releases a pre-allocated child socket that was never used) | |
483 | */ | |
0c3141e9 | 484 | if (sk == NULL) |
b97bf3fd | 485 | return 0; |
c4307285 | 486 | |
58ed9442 | 487 | tsk = tipc_sk(sk); |
0c3141e9 AS |
488 | lock_sock(sk); |
489 | ||
490 | /* | |
491 | * Reject all unreceived messages, except on an active connection | |
492 | * (which disconnects locally & sends a 'FIN+' to peer) | |
493 | */ | |
301bae56 | 494 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 495 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
496 | skb = __skb_dequeue(&sk->sk_receive_queue); |
497 | if (skb == NULL) | |
b97bf3fd | 498 | break; |
a6ca1094 YX |
499 | if (TIPC_SKB_CB(skb)->handle != NULL) |
500 | kfree_skb(skb); | |
0c3141e9 AS |
501 | else { |
502 | if ((sock->state == SS_CONNECTING) || | |
503 | (sock->state == SS_CONNECTED)) { | |
504 | sock->state = SS_DISCONNECTING; | |
301bae56 | 505 | tsk->connected = 0; |
07f6c4bc | 506 | tipc_node_remove_conn(dnode, tsk->portid); |
0c3141e9 | 507 | } |
a6ca1094 YX |
508 | if (tipc_msg_reverse(skb, &dnode, TIPC_ERR_NO_PORT)) |
509 | tipc_link_xmit_skb(skb, dnode, 0); | |
0c3141e9 | 510 | } |
b97bf3fd PL |
511 | } |
512 | ||
301bae56 | 513 | tipc_sk_withdraw(tsk, 0, NULL); |
2f55c437 | 514 | del_timer_sync(&tsk->timer); |
07f6c4bc | 515 | tipc_sk_remove(tsk); |
301bae56 | 516 | if (tsk->connected) { |
a6ca1094 | 517 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, |
5b8fa7ce | 518 | SHORT_H_SIZE, 0, dnode, tipc_own_addr, |
301bae56 | 519 | tsk_peer_port(tsk), |
07f6c4bc | 520 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 521 | if (skb) |
07f6c4bc YX |
522 | tipc_link_xmit_skb(skb, dnode, tsk->portid); |
523 | tipc_node_remove_conn(dnode, tsk->portid); | |
5b8fa7ce | 524 | } |
b97bf3fd | 525 | |
0c3141e9 | 526 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 527 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 528 | |
0c3141e9 | 529 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
530 | sock->state = SS_DISCONNECTING; |
531 | release_sock(sk); | |
07f6c4bc YX |
532 | |
533 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 534 | sock->sk = NULL; |
b97bf3fd | 535 | |
065d7e39 | 536 | return 0; |
b97bf3fd PL |
537 | } |
538 | ||
539 | /** | |
247f0f3c | 540 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
541 | * @sock: socket structure |
542 | * @uaddr: socket address describing name(s) and desired operation | |
543 | * @uaddr_len: size of socket address data structure | |
c4307285 | 544 | * |
b97bf3fd PL |
545 | * Name and name sequence binding is indicated using a positive scope value; |
546 | * a negative scope value unbinds the specified name. Specifying no name | |
547 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 548 | * |
b97bf3fd | 549 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
550 | * |
551 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
552 | * access any non-constant socket information. | |
b97bf3fd | 553 | */ |
247f0f3c YX |
554 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
555 | int uaddr_len) | |
b97bf3fd | 556 | { |
84602761 | 557 | struct sock *sk = sock->sk; |
b97bf3fd | 558 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 559 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 560 | int res = -EINVAL; |
b97bf3fd | 561 | |
84602761 YX |
562 | lock_sock(sk); |
563 | if (unlikely(!uaddr_len)) { | |
301bae56 | 564 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
565 | goto exit; |
566 | } | |
c4307285 | 567 | |
84602761 YX |
568 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
569 | res = -EINVAL; | |
570 | goto exit; | |
571 | } | |
572 | if (addr->family != AF_TIPC) { | |
573 | res = -EAFNOSUPPORT; | |
574 | goto exit; | |
575 | } | |
b97bf3fd | 576 | |
b97bf3fd PL |
577 | if (addr->addrtype == TIPC_ADDR_NAME) |
578 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
579 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
580 | res = -EAFNOSUPPORT; | |
581 | goto exit; | |
582 | } | |
c4307285 | 583 | |
13a2e898 | 584 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 585 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
586 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
587 | res = -EACCES; | |
588 | goto exit; | |
589 | } | |
c422f1bd | 590 | |
84602761 | 591 | res = (addr->scope > 0) ? |
301bae56 JPM |
592 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
593 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
594 | exit: |
595 | release_sock(sk); | |
596 | return res; | |
b97bf3fd PL |
597 | } |
598 | ||
c4307285 | 599 | /** |
247f0f3c | 600 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
601 | * @sock: socket structure |
602 | * @uaddr: area for returned socket address | |
603 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 604 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 605 | * |
b97bf3fd | 606 | * Returns 0 on success, errno otherwise |
0c3141e9 | 607 | * |
2da59918 AS |
608 | * NOTE: This routine doesn't need to take the socket lock since it only |
609 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 610 | * a completely predictable manner). |
b97bf3fd | 611 | */ |
247f0f3c YX |
612 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
613 | int *uaddr_len, int peer) | |
b97bf3fd | 614 | { |
b97bf3fd | 615 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 616 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
b97bf3fd | 617 | |
88f8a5e3 | 618 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 619 | if (peer) { |
2da59918 AS |
620 | if ((sock->state != SS_CONNECTED) && |
621 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
622 | return -ENOTCONN; | |
301bae56 JPM |
623 | addr->addr.id.ref = tsk_peer_port(tsk); |
624 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 625 | } else { |
07f6c4bc | 626 | addr->addr.id.ref = tsk->portid; |
b924dcf0 | 627 | addr->addr.id.node = tipc_own_addr; |
0c3141e9 | 628 | } |
b97bf3fd PL |
629 | |
630 | *uaddr_len = sizeof(*addr); | |
631 | addr->addrtype = TIPC_ADDR_ID; | |
632 | addr->family = AF_TIPC; | |
633 | addr->scope = 0; | |
b97bf3fd PL |
634 | addr->addr.name.domain = 0; |
635 | ||
0c3141e9 | 636 | return 0; |
b97bf3fd PL |
637 | } |
638 | ||
639 | /** | |
247f0f3c | 640 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
641 | * @file: file structure associated with the socket |
642 | * @sock: socket for which to calculate the poll bits | |
643 | * @wait: ??? | |
644 | * | |
9b674e82 AS |
645 | * Returns pollmask value |
646 | * | |
647 | * COMMENTARY: | |
648 | * It appears that the usual socket locking mechanisms are not useful here | |
649 | * since the pollmask info is potentially out-of-date the moment this routine | |
650 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
651 | * to handle any preventable race conditions, so TIPC will do the same ... | |
652 | * | |
653 | * TIPC sets the returned events as follows: | |
f662c070 AS |
654 | * |
655 | * socket state flags set | |
656 | * ------------ --------- | |
657 | * unconnected no read flags | |
c4fc298a | 658 | * POLLOUT if port is not congested |
f662c070 AS |
659 | * |
660 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
661 | * no write flags | |
662 | * | |
663 | * connected POLLIN/POLLRDNORM if data in rx queue | |
664 | * POLLOUT if port is not congested | |
665 | * | |
666 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
667 | * no write flags | |
668 | * | |
669 | * listening POLLIN if SYN in rx queue | |
670 | * no write flags | |
671 | * | |
672 | * ready POLLIN/POLLRDNORM if data in rx queue | |
673 | * [connectionless] POLLOUT (since port cannot be congested) | |
674 | * | |
675 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
676 | * imply that the operation will succeed, merely that it should be performed | |
677 | * and will not block. | |
b97bf3fd | 678 | */ |
247f0f3c YX |
679 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
680 | poll_table *wait) | |
b97bf3fd | 681 | { |
9b674e82 | 682 | struct sock *sk = sock->sk; |
58ed9442 | 683 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 684 | u32 mask = 0; |
9b674e82 | 685 | |
f288bef4 | 686 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 687 | |
f662c070 | 688 | switch ((int)sock->state) { |
c4fc298a | 689 | case SS_UNCONNECTED: |
60120526 | 690 | if (!tsk->link_cong) |
c4fc298a EH |
691 | mask |= POLLOUT; |
692 | break; | |
f662c070 AS |
693 | case SS_READY: |
694 | case SS_CONNECTED: | |
301bae56 | 695 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
696 | mask |= POLLOUT; |
697 | /* fall thru' */ | |
698 | case SS_CONNECTING: | |
699 | case SS_LISTENING: | |
700 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
701 | mask |= (POLLIN | POLLRDNORM); | |
702 | break; | |
703 | case SS_DISCONNECTING: | |
704 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
705 | break; | |
706 | } | |
9b674e82 AS |
707 | |
708 | return mask; | |
b97bf3fd PL |
709 | } |
710 | ||
0abd8ff2 JPM |
711 | /** |
712 | * tipc_sendmcast - send multicast message | |
713 | * @sock: socket structure | |
714 | * @seq: destination address | |
562640f3 | 715 | * @msg: message to send |
0abd8ff2 JPM |
716 | * @dsz: total length of message data |
717 | * @timeo: timeout to wait for wakeup | |
718 | * | |
719 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
720 | * Returns the number of bytes sent on success, or errno | |
721 | */ | |
722 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 723 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
724 | { |
725 | struct sock *sk = sock->sk; | |
301bae56 | 726 | struct tipc_msg *mhdr = &tipc_sk(sk)->phdr; |
a6ca1094 | 727 | struct sk_buff_head head; |
0abd8ff2 JPM |
728 | uint mtu; |
729 | int rc; | |
730 | ||
731 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
732 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
733 | msg_set_destport(mhdr, 0); | |
734 | msg_set_destnode(mhdr, 0); | |
735 | msg_set_nametype(mhdr, seq->type); | |
736 | msg_set_namelower(mhdr, seq->lower); | |
737 | msg_set_nameupper(mhdr, seq->upper); | |
738 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
739 | ||
740 | new_mtu: | |
741 | mtu = tipc_bclink_get_mtu(); | |
a6ca1094 YX |
742 | __skb_queue_head_init(&head); |
743 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &head); | |
0abd8ff2 JPM |
744 | if (unlikely(rc < 0)) |
745 | return rc; | |
746 | ||
747 | do { | |
a6ca1094 | 748 | rc = tipc_bclink_xmit(&head); |
0abd8ff2 JPM |
749 | if (likely(rc >= 0)) { |
750 | rc = dsz; | |
751 | break; | |
752 | } | |
753 | if (rc == -EMSGSIZE) | |
754 | goto new_mtu; | |
755 | if (rc != -ELINKCONG) | |
756 | break; | |
50100a5e | 757 | tipc_sk(sk)->link_cong = 1; |
0abd8ff2 JPM |
758 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
759 | if (rc) | |
a6ca1094 | 760 | __skb_queue_purge(&head); |
0abd8ff2 JPM |
761 | } while (!rc); |
762 | return rc; | |
763 | } | |
764 | ||
078bec82 JPM |
765 | /* tipc_sk_mcast_rcv - Deliver multicast message to all destination sockets |
766 | */ | |
767 | void tipc_sk_mcast_rcv(struct sk_buff *buf) | |
768 | { | |
769 | struct tipc_msg *msg = buf_msg(buf); | |
770 | struct tipc_port_list dports = {0, NULL, }; | |
771 | struct tipc_port_list *item; | |
772 | struct sk_buff *b; | |
773 | uint i, last, dst = 0; | |
774 | u32 scope = TIPC_CLUSTER_SCOPE; | |
775 | ||
776 | if (in_own_node(msg_orignode(msg))) | |
777 | scope = TIPC_NODE_SCOPE; | |
778 | ||
779 | /* Create destination port list: */ | |
780 | tipc_nametbl_mc_translate(msg_nametype(msg), | |
781 | msg_namelower(msg), | |
782 | msg_nameupper(msg), | |
783 | scope, | |
784 | &dports); | |
785 | last = dports.count; | |
786 | if (!last) { | |
787 | kfree_skb(buf); | |
788 | return; | |
789 | } | |
790 | ||
791 | for (item = &dports; item; item = item->next) { | |
792 | for (i = 0; i < PLSIZE && ++dst <= last; i++) { | |
793 | b = (dst != last) ? skb_clone(buf, GFP_ATOMIC) : buf; | |
794 | if (!b) { | |
795 | pr_warn("Failed do clone mcast rcv buffer\n"); | |
796 | continue; | |
797 | } | |
798 | msg_set_destport(msg, item->ports[i]); | |
799 | tipc_sk_rcv(b); | |
800 | } | |
801 | } | |
802 | tipc_port_list_free(&dports); | |
803 | } | |
804 | ||
ac0074ee JPM |
805 | /** |
806 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
807 | * @tsk: receiving socket | |
808 | * @dnode: node to send response message to, if any | |
809 | * @buf: buffer containing protocol message | |
810 | * Returns 0 (TIPC_OK) if message was consumed, 1 (TIPC_FWD_MSG) if | |
811 | * (CONN_PROBE_REPLY) message should be forwarded. | |
812 | */ | |
52f50ce5 WY |
813 | static int tipc_sk_proto_rcv(struct tipc_sock *tsk, u32 *dnode, |
814 | struct sk_buff *buf) | |
ac0074ee JPM |
815 | { |
816 | struct tipc_msg *msg = buf_msg(buf); | |
60120526 | 817 | int conn_cong; |
ac0074ee JPM |
818 | |
819 | /* Ignore if connection cannot be validated: */ | |
2e84c60b | 820 | if (!tsk_peer_msg(tsk, msg)) |
ac0074ee JPM |
821 | goto exit; |
822 | ||
301bae56 | 823 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee JPM |
824 | |
825 | if (msg_type(msg) == CONN_ACK) { | |
301bae56 | 826 | conn_cong = tsk_conn_cong(tsk); |
60120526 JPM |
827 | tsk->sent_unacked -= msg_msgcnt(msg); |
828 | if (conn_cong) | |
50100a5e | 829 | tsk->sk.sk_write_space(&tsk->sk); |
ac0074ee JPM |
830 | } else if (msg_type(msg) == CONN_PROBE) { |
831 | if (!tipc_msg_reverse(buf, dnode, TIPC_OK)) | |
832 | return TIPC_OK; | |
833 | msg_set_type(msg, CONN_PROBE_REPLY); | |
834 | return TIPC_FWD_MSG; | |
835 | } | |
836 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ | |
837 | exit: | |
838 | kfree_skb(buf); | |
839 | return TIPC_OK; | |
840 | } | |
841 | ||
3f40504f YX |
842 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
843 | { | |
844 | struct sock *sk = sock->sk; | |
58ed9442 | 845 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
846 | DEFINE_WAIT(wait); |
847 | int done; | |
848 | ||
849 | do { | |
850 | int err = sock_error(sk); | |
851 | if (err) | |
852 | return err; | |
853 | if (sock->state == SS_DISCONNECTING) | |
854 | return -EPIPE; | |
855 | if (!*timeo_p) | |
856 | return -EAGAIN; | |
857 | if (signal_pending(current)) | |
858 | return sock_intr_errno(*timeo_p); | |
859 | ||
860 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 861 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
862 | finish_wait(sk_sleep(sk), &wait); |
863 | } while (!done); | |
864 | return 0; | |
865 | } | |
866 | ||
b97bf3fd | 867 | /** |
247f0f3c | 868 | * tipc_sendmsg - send message in connectionless manner |
0c3141e9 | 869 | * @iocb: if NULL, indicates that socket lock is already held |
b97bf3fd PL |
870 | * @sock: socket structure |
871 | * @m: message to send | |
e2dafe87 | 872 | * @dsz: amount of user data to be sent |
c4307285 | 873 | * |
b97bf3fd | 874 | * Message must have an destination specified explicitly. |
c4307285 | 875 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
876 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
877 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 878 | * |
b97bf3fd PL |
879 | * Returns the number of bytes sent on success, or errno otherwise |
880 | */ | |
247f0f3c | 881 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
e2dafe87 | 882 | struct msghdr *m, size_t dsz) |
b97bf3fd | 883 | { |
e2dafe87 | 884 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 885 | struct sock *sk = sock->sk; |
58ed9442 | 886 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 887 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 888 | u32 dnode, dport; |
a6ca1094 YX |
889 | struct sk_buff_head head; |
890 | struct sk_buff *skb; | |
e2dafe87 JPM |
891 | struct tipc_name_seq *seq = &dest->addr.nameseq; |
892 | u32 mtu; | |
3f40504f | 893 | long timeo; |
88b17b6a | 894 | int rc; |
b97bf3fd PL |
895 | |
896 | if (unlikely(!dest)) | |
897 | return -EDESTADDRREQ; | |
e2dafe87 | 898 | |
51f9cc1f AS |
899 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
900 | (dest->family != AF_TIPC))) | |
b97bf3fd | 901 | return -EINVAL; |
e2dafe87 JPM |
902 | |
903 | if (dsz > TIPC_MAX_USER_MSG_SIZE) | |
c29c3f70 | 904 | return -EMSGSIZE; |
b97bf3fd | 905 | |
0c3141e9 AS |
906 | if (iocb) |
907 | lock_sock(sk); | |
908 | ||
e2dafe87 | 909 | if (unlikely(sock->state != SS_READY)) { |
0c3141e9 | 910 | if (sock->state == SS_LISTENING) { |
e2dafe87 | 911 | rc = -EPIPE; |
0c3141e9 AS |
912 | goto exit; |
913 | } | |
914 | if (sock->state != SS_UNCONNECTED) { | |
e2dafe87 | 915 | rc = -EISCONN; |
0c3141e9 AS |
916 | goto exit; |
917 | } | |
301bae56 | 918 | if (tsk->published) { |
e2dafe87 | 919 | rc = -EOPNOTSUPP; |
0c3141e9 AS |
920 | goto exit; |
921 | } | |
3388007b | 922 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
923 | tsk->conn_type = dest->addr.name.name.type; |
924 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 925 | } |
b97bf3fd PL |
926 | } |
927 | ||
3f40504f | 928 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
929 | |
930 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
562640f3 | 931 | rc = tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
932 | goto exit; |
933 | } else if (dest->addrtype == TIPC_ADDR_NAME) { | |
934 | u32 type = dest->addr.name.name.type; | |
935 | u32 inst = dest->addr.name.name.instance; | |
936 | u32 domain = dest->addr.name.domain; | |
937 | ||
938 | dnode = domain; | |
939 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
940 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
941 | msg_set_nametype(mhdr, type); | |
942 | msg_set_nameinst(mhdr, inst); | |
943 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
944 | dport = tipc_nametbl_translate(type, inst, &dnode); | |
945 | msg_set_destnode(mhdr, dnode); | |
946 | msg_set_destport(mhdr, dport); | |
947 | if (unlikely(!dport && !dnode)) { | |
948 | rc = -EHOSTUNREACH; | |
949 | goto exit; | |
c4307285 | 950 | } |
e2dafe87 JPM |
951 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
952 | dnode = dest->addr.id.node; | |
953 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
954 | msg_set_lookup_scope(mhdr, 0); | |
955 | msg_set_destnode(mhdr, dnode); | |
956 | msg_set_destport(mhdr, dest->addr.id.ref); | |
957 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
958 | } | |
959 | ||
960 | new_mtu: | |
07f6c4bc | 961 | mtu = tipc_node_get_mtu(dnode, tsk->portid); |
a6ca1094 YX |
962 | __skb_queue_head_init(&head); |
963 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &head); | |
e2dafe87 JPM |
964 | if (rc < 0) |
965 | goto exit; | |
966 | ||
967 | do { | |
a6ca1094 YX |
968 | skb = skb_peek(&head); |
969 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; | |
07f6c4bc | 970 | rc = tipc_link_xmit(&head, dnode, tsk->portid); |
e2dafe87 JPM |
971 | if (likely(rc >= 0)) { |
972 | if (sock->state != SS_READY) | |
0c3141e9 | 973 | sock->state = SS_CONNECTING; |
e2dafe87 | 974 | rc = dsz; |
0c3141e9 | 975 | break; |
c4307285 | 976 | } |
e2dafe87 JPM |
977 | if (rc == -EMSGSIZE) |
978 | goto new_mtu; | |
e2dafe87 | 979 | if (rc != -ELINKCONG) |
0c3141e9 | 980 | break; |
50100a5e | 981 | tsk->link_cong = 1; |
e2dafe87 | 982 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
70452dcb | 983 | if (rc) |
a6ca1094 | 984 | __skb_queue_purge(&head); |
e2dafe87 | 985 | } while (!rc); |
0c3141e9 AS |
986 | exit: |
987 | if (iocb) | |
988 | release_sock(sk); | |
e2dafe87 JPM |
989 | |
990 | return rc; | |
b97bf3fd PL |
991 | } |
992 | ||
391a6dd1 YX |
993 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
994 | { | |
995 | struct sock *sk = sock->sk; | |
58ed9442 | 996 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
997 | DEFINE_WAIT(wait); |
998 | int done; | |
999 | ||
1000 | do { | |
1001 | int err = sock_error(sk); | |
1002 | if (err) | |
1003 | return err; | |
1004 | if (sock->state == SS_DISCONNECTING) | |
1005 | return -EPIPE; | |
1006 | else if (sock->state != SS_CONNECTED) | |
1007 | return -ENOTCONN; | |
1008 | if (!*timeo_p) | |
1009 | return -EAGAIN; | |
1010 | if (signal_pending(current)) | |
1011 | return sock_intr_errno(*timeo_p); | |
1012 | ||
1013 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1014 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 1015 | (!tsk->link_cong && |
301bae56 JPM |
1016 | !tsk_conn_cong(tsk)) || |
1017 | !tsk->connected); | |
391a6dd1 YX |
1018 | finish_wait(sk_sleep(sk), &wait); |
1019 | } while (!done); | |
1020 | return 0; | |
1021 | } | |
1022 | ||
c4307285 | 1023 | /** |
4ccfe5e0 JPM |
1024 | * tipc_send_stream - send stream-oriented data |
1025 | * @iocb: (unused) | |
b97bf3fd | 1026 | * @sock: socket structure |
4ccfe5e0 JPM |
1027 | * @m: data to send |
1028 | * @dsz: total length of data to be transmitted | |
c4307285 | 1029 | * |
4ccfe5e0 | 1030 | * Used for SOCK_STREAM data. |
c4307285 | 1031 | * |
4ccfe5e0 JPM |
1032 | * Returns the number of bytes sent on success (or partial success), |
1033 | * or errno if no data sent | |
b97bf3fd | 1034 | */ |
4ccfe5e0 JPM |
1035 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
1036 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 1037 | { |
0c3141e9 | 1038 | struct sock *sk = sock->sk; |
58ed9442 | 1039 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1040 | struct tipc_msg *mhdr = &tsk->phdr; |
a6ca1094 | 1041 | struct sk_buff_head head; |
342dfc30 | 1042 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1043 | u32 portid = tsk->portid; |
4ccfe5e0 | 1044 | int rc = -EINVAL; |
391a6dd1 | 1045 | long timeo; |
4ccfe5e0 JPM |
1046 | u32 dnode; |
1047 | uint mtu, send, sent = 0; | |
b97bf3fd PL |
1048 | |
1049 | /* Handle implied connection establishment */ | |
4ccfe5e0 JPM |
1050 | if (unlikely(dest)) { |
1051 | rc = tipc_sendmsg(iocb, sock, m, dsz); | |
1052 | if (dsz && (dsz == rc)) | |
60120526 | 1053 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
1054 | return rc; |
1055 | } | |
1056 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1057 | return -EMSGSIZE; |
1058 | ||
0c3141e9 AS |
1059 | if (iocb) |
1060 | lock_sock(sk); | |
b97bf3fd | 1061 | |
391a6dd1 YX |
1062 | if (unlikely(sock->state != SS_CONNECTED)) { |
1063 | if (sock->state == SS_DISCONNECTING) | |
4ccfe5e0 | 1064 | rc = -EPIPE; |
391a6dd1 | 1065 | else |
4ccfe5e0 | 1066 | rc = -ENOTCONN; |
391a6dd1 YX |
1067 | goto exit; |
1068 | } | |
1d835874 | 1069 | |
391a6dd1 | 1070 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
301bae56 | 1071 | dnode = tsk_peer_node(tsk); |
4ccfe5e0 JPM |
1072 | |
1073 | next: | |
301bae56 | 1074 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1075 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
a6ca1094 YX |
1076 | __skb_queue_head_init(&head); |
1077 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, &head); | |
4ccfe5e0 JPM |
1078 | if (unlikely(rc < 0)) |
1079 | goto exit; | |
c4307285 | 1080 | do { |
301bae56 | 1081 | if (likely(!tsk_conn_cong(tsk))) { |
07f6c4bc | 1082 | rc = tipc_link_xmit(&head, dnode, portid); |
4ccfe5e0 | 1083 | if (likely(!rc)) { |
60120526 | 1084 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1085 | sent += send; |
1086 | if (sent == dsz) | |
1087 | break; | |
1088 | goto next; | |
1089 | } | |
1090 | if (rc == -EMSGSIZE) { | |
07f6c4bc | 1091 | tsk->max_pkt = tipc_node_get_mtu(dnode, portid); |
4ccfe5e0 JPM |
1092 | goto next; |
1093 | } | |
1094 | if (rc != -ELINKCONG) | |
1095 | break; | |
50100a5e | 1096 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1097 | } |
1098 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
70452dcb | 1099 | if (rc) |
a6ca1094 | 1100 | __skb_queue_purge(&head); |
4ccfe5e0 | 1101 | } while (!rc); |
391a6dd1 | 1102 | exit: |
0c3141e9 AS |
1103 | if (iocb) |
1104 | release_sock(sk); | |
4ccfe5e0 | 1105 | return sent ? sent : rc; |
b97bf3fd PL |
1106 | } |
1107 | ||
c4307285 | 1108 | /** |
4ccfe5e0 JPM |
1109 | * tipc_send_packet - send a connection-oriented message |
1110 | * @iocb: if NULL, indicates that socket lock is already held | |
b97bf3fd | 1111 | * @sock: socket structure |
4ccfe5e0 JPM |
1112 | * @m: message to send |
1113 | * @dsz: length of data to be transmitted | |
c4307285 | 1114 | * |
4ccfe5e0 | 1115 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1116 | * |
4ccfe5e0 | 1117 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1118 | */ |
4ccfe5e0 JPM |
1119 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
1120 | struct msghdr *m, size_t dsz) | |
b97bf3fd | 1121 | { |
4ccfe5e0 JPM |
1122 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1123 | return -EMSGSIZE; | |
b97bf3fd | 1124 | |
4ccfe5e0 | 1125 | return tipc_send_stream(iocb, sock, m, dsz); |
b97bf3fd PL |
1126 | } |
1127 | ||
dadebc00 | 1128 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1129 | */ |
301bae56 | 1130 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1131 | u32 peer_node) |
b97bf3fd | 1132 | { |
301bae56 | 1133 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1134 | |
dadebc00 JPM |
1135 | msg_set_destnode(msg, peer_node); |
1136 | msg_set_destport(msg, peer_port); | |
1137 | msg_set_type(msg, TIPC_CONN_MSG); | |
1138 | msg_set_lookup_scope(msg, 0); | |
1139 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1140 | |
2f55c437 | 1141 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 JPM |
1142 | tsk->probing_state = TIPC_CONN_OK; |
1143 | tsk->connected = 1; | |
2f55c437 | 1144 | mod_timer(&tsk->timer, jiffies + tsk->probing_intv); |
07f6c4bc YX |
1145 | tipc_node_add_conn(peer_node, tsk->portid, peer_port); |
1146 | tsk->max_pkt = tipc_node_get_mtu(peer_node, tsk->portid); | |
b97bf3fd PL |
1147 | } |
1148 | ||
1149 | /** | |
1150 | * set_orig_addr - capture sender's address for received message | |
1151 | * @m: descriptor for message info | |
1152 | * @msg: received message header | |
c4307285 | 1153 | * |
b97bf3fd PL |
1154 | * Note: Address is not captured if not requested by receiver. |
1155 | */ | |
05790c64 | 1156 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1157 | { |
342dfc30 | 1158 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1159 | |
c4307285 | 1160 | if (addr) { |
b97bf3fd PL |
1161 | addr->family = AF_TIPC; |
1162 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1163 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1164 | addr->addr.id.ref = msg_origport(msg); |
1165 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1166 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1167 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1168 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1169 | } | |
1170 | } | |
1171 | ||
1172 | /** | |
301bae56 | 1173 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1174 | * @m: descriptor for message info |
1175 | * @msg: received message header | |
301bae56 | 1176 | * @tsk: TIPC port associated with message |
c4307285 | 1177 | * |
b97bf3fd | 1178 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1179 | * |
b97bf3fd PL |
1180 | * Returns 0 if successful, otherwise errno |
1181 | */ | |
301bae56 JPM |
1182 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1183 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1184 | { |
1185 | u32 anc_data[3]; | |
1186 | u32 err; | |
1187 | u32 dest_type; | |
3546c750 | 1188 | int has_name; |
b97bf3fd PL |
1189 | int res; |
1190 | ||
1191 | if (likely(m->msg_controllen == 0)) | |
1192 | return 0; | |
1193 | ||
1194 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1195 | err = msg ? msg_errcode(msg) : 0; |
1196 | if (unlikely(err)) { | |
1197 | anc_data[0] = err; | |
1198 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1199 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1200 | if (res) | |
b97bf3fd | 1201 | return res; |
2db9983a AS |
1202 | if (anc_data[1]) { |
1203 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1204 | msg_data(msg)); | |
1205 | if (res) | |
1206 | return res; | |
1207 | } | |
b97bf3fd PL |
1208 | } |
1209 | ||
1210 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1211 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1212 | switch (dest_type) { | |
1213 | case TIPC_NAMED_MSG: | |
3546c750 | 1214 | has_name = 1; |
b97bf3fd PL |
1215 | anc_data[0] = msg_nametype(msg); |
1216 | anc_data[1] = msg_namelower(msg); | |
1217 | anc_data[2] = msg_namelower(msg); | |
1218 | break; | |
1219 | case TIPC_MCAST_MSG: | |
3546c750 | 1220 | has_name = 1; |
b97bf3fd PL |
1221 | anc_data[0] = msg_nametype(msg); |
1222 | anc_data[1] = msg_namelower(msg); | |
1223 | anc_data[2] = msg_nameupper(msg); | |
1224 | break; | |
1225 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1226 | has_name = (tsk->conn_type != 0); |
1227 | anc_data[0] = tsk->conn_type; | |
1228 | anc_data[1] = tsk->conn_instance; | |
1229 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1230 | break; |
1231 | default: | |
3546c750 | 1232 | has_name = 0; |
b97bf3fd | 1233 | } |
2db9983a AS |
1234 | if (has_name) { |
1235 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1236 | if (res) | |
1237 | return res; | |
1238 | } | |
b97bf3fd PL |
1239 | |
1240 | return 0; | |
1241 | } | |
1242 | ||
301bae56 | 1243 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
739f5e4e | 1244 | { |
a6ca1094 | 1245 | struct sk_buff *skb = NULL; |
739f5e4e | 1246 | struct tipc_msg *msg; |
301bae56 JPM |
1247 | u32 peer_port = tsk_peer_port(tsk); |
1248 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1249 | |
301bae56 | 1250 | if (!tsk->connected) |
739f5e4e | 1251 | return; |
a6ca1094 | 1252 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode, |
07f6c4bc | 1253 | tipc_own_addr, peer_port, tsk->portid, TIPC_OK); |
a6ca1094 | 1254 | if (!skb) |
739f5e4e | 1255 | return; |
a6ca1094 | 1256 | msg = buf_msg(skb); |
739f5e4e | 1257 | msg_set_msgcnt(msg, ack); |
a6ca1094 | 1258 | tipc_link_xmit_skb(skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1259 | } |
1260 | ||
85d3fc94 | 1261 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1262 | { |
1263 | struct sock *sk = sock->sk; | |
1264 | DEFINE_WAIT(wait); | |
85d3fc94 | 1265 | long timeo = *timeop; |
9bbb4ecc YX |
1266 | int err; |
1267 | ||
1268 | for (;;) { | |
1269 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1270 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1271 | if (sock->state == SS_DISCONNECTING) { |
1272 | err = -ENOTCONN; | |
1273 | break; | |
1274 | } | |
1275 | release_sock(sk); | |
1276 | timeo = schedule_timeout(timeo); | |
1277 | lock_sock(sk); | |
1278 | } | |
1279 | err = 0; | |
1280 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1281 | break; | |
1282 | err = sock_intr_errno(timeo); | |
1283 | if (signal_pending(current)) | |
1284 | break; | |
1285 | err = -EAGAIN; | |
1286 | if (!timeo) | |
1287 | break; | |
1288 | } | |
1289 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1290 | *timeop = timeo; |
9bbb4ecc YX |
1291 | return err; |
1292 | } | |
1293 | ||
c4307285 | 1294 | /** |
247f0f3c | 1295 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1296 | * @iocb: (unused) |
1297 | * @m: descriptor for message info | |
1298 | * @buf_len: total size of user buffer area | |
1299 | * @flags: receive flags | |
c4307285 | 1300 | * |
b97bf3fd PL |
1301 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1302 | * If the complete message doesn't fit in user area, truncate it. | |
1303 | * | |
1304 | * Returns size of returned message data, errno otherwise | |
1305 | */ | |
247f0f3c YX |
1306 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
1307 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1308 | { |
0c3141e9 | 1309 | struct sock *sk = sock->sk; |
58ed9442 | 1310 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1311 | struct sk_buff *buf; |
1312 | struct tipc_msg *msg; | |
9bbb4ecc | 1313 | long timeo; |
b97bf3fd PL |
1314 | unsigned int sz; |
1315 | u32 err; | |
1316 | int res; | |
1317 | ||
0c3141e9 | 1318 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1319 | if (unlikely(!buf_len)) |
1320 | return -EINVAL; | |
1321 | ||
0c3141e9 | 1322 | lock_sock(sk); |
b97bf3fd | 1323 | |
0c3141e9 AS |
1324 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1325 | res = -ENOTCONN; | |
b97bf3fd PL |
1326 | goto exit; |
1327 | } | |
1328 | ||
9bbb4ecc | 1329 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1330 | restart: |
b97bf3fd | 1331 | |
0c3141e9 | 1332 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1333 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1334 | if (res) |
1335 | goto exit; | |
b97bf3fd | 1336 | |
0c3141e9 | 1337 | /* Look at first message in receive queue */ |
0c3141e9 | 1338 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1339 | msg = buf_msg(buf); |
1340 | sz = msg_data_sz(msg); | |
1341 | err = msg_errcode(msg); | |
1342 | ||
b97bf3fd | 1343 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1344 | if ((!sz) && (!err)) { |
2e84c60b | 1345 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1346 | goto restart; |
1347 | } | |
1348 | ||
1349 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1350 | set_orig_addr(m, msg); |
1351 | ||
1352 | /* Capture ancillary data (optional) */ | |
301bae56 | 1353 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1354 | if (res) |
b97bf3fd PL |
1355 | goto exit; |
1356 | ||
1357 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1358 | if (!err) { |
1359 | if (unlikely(buf_len < sz)) { | |
1360 | sz = buf_len; | |
1361 | m->msg_flags |= MSG_TRUNC; | |
1362 | } | |
51f3d02b | 1363 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
0232fd0a | 1364 | if (res) |
b97bf3fd | 1365 | goto exit; |
b97bf3fd PL |
1366 | res = sz; |
1367 | } else { | |
1368 | if ((sock->state == SS_READY) || | |
1369 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1370 | res = 0; | |
1371 | else | |
1372 | res = -ECONNRESET; | |
1373 | } | |
1374 | ||
1375 | /* Consume received message (optional) */ | |
b97bf3fd | 1376 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1377 | if ((sock->state != SS_READY) && |
60120526 | 1378 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1379 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1380 | tsk->rcv_unacked = 0; |
1381 | } | |
2e84c60b | 1382 | tsk_advance_rx_queue(sk); |
c4307285 | 1383 | } |
b97bf3fd | 1384 | exit: |
0c3141e9 | 1385 | release_sock(sk); |
b97bf3fd PL |
1386 | return res; |
1387 | } | |
1388 | ||
c4307285 | 1389 | /** |
247f0f3c | 1390 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1391 | * @iocb: (unused) |
1392 | * @m: descriptor for message info | |
1393 | * @buf_len: total size of user buffer area | |
1394 | * @flags: receive flags | |
c4307285 YH |
1395 | * |
1396 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1397 | * will optionally wait for more; never truncates data. |
1398 | * | |
1399 | * Returns size of returned message data, errno otherwise | |
1400 | */ | |
247f0f3c YX |
1401 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
1402 | struct msghdr *m, size_t buf_len, int flags) | |
b97bf3fd | 1403 | { |
0c3141e9 | 1404 | struct sock *sk = sock->sk; |
58ed9442 | 1405 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1406 | struct sk_buff *buf; |
1407 | struct tipc_msg *msg; | |
9bbb4ecc | 1408 | long timeo; |
b97bf3fd | 1409 | unsigned int sz; |
3720d40b | 1410 | int sz_to_copy, target, needed; |
b97bf3fd | 1411 | int sz_copied = 0; |
b97bf3fd | 1412 | u32 err; |
0c3141e9 | 1413 | int res = 0; |
b97bf3fd | 1414 | |
0c3141e9 | 1415 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1416 | if (unlikely(!buf_len)) |
1417 | return -EINVAL; | |
1418 | ||
0c3141e9 | 1419 | lock_sock(sk); |
b97bf3fd | 1420 | |
9bbb4ecc | 1421 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1422 | res = -ENOTCONN; |
b97bf3fd PL |
1423 | goto exit; |
1424 | } | |
1425 | ||
3720d40b | 1426 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1427 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1428 | |
617d3c7a | 1429 | restart: |
0c3141e9 | 1430 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1431 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1432 | if (res) |
1433 | goto exit; | |
b97bf3fd | 1434 | |
0c3141e9 | 1435 | /* Look at first message in receive queue */ |
0c3141e9 | 1436 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1437 | msg = buf_msg(buf); |
1438 | sz = msg_data_sz(msg); | |
1439 | err = msg_errcode(msg); | |
1440 | ||
1441 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1442 | if ((!sz) && (!err)) { |
2e84c60b | 1443 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1444 | goto restart; |
1445 | } | |
1446 | ||
1447 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1448 | if (sz_copied == 0) { |
1449 | set_orig_addr(m, msg); | |
301bae56 | 1450 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1451 | if (res) |
b97bf3fd PL |
1452 | goto exit; |
1453 | } | |
1454 | ||
1455 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1456 | if (!err) { |
0232fd0a | 1457 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1458 | |
0232fd0a | 1459 | sz -= offset; |
b97bf3fd PL |
1460 | needed = (buf_len - sz_copied); |
1461 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a | 1462 | |
51f3d02b DM |
1463 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
1464 | m, sz_to_copy); | |
0232fd0a | 1465 | if (res) |
b97bf3fd | 1466 | goto exit; |
0232fd0a | 1467 | |
b97bf3fd PL |
1468 | sz_copied += sz_to_copy; |
1469 | ||
1470 | if (sz_to_copy < sz) { | |
1471 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1472 | TIPC_SKB_CB(buf)->handle = |
1473 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1474 | goto exit; |
1475 | } | |
b97bf3fd PL |
1476 | } else { |
1477 | if (sz_copied != 0) | |
1478 | goto exit; /* can't add error msg to valid data */ | |
1479 | ||
1480 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1481 | res = 0; | |
1482 | else | |
1483 | res = -ECONNRESET; | |
1484 | } | |
1485 | ||
1486 | /* Consume received message (optional) */ | |
b97bf3fd | 1487 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1488 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1489 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1490 | tsk->rcv_unacked = 0; |
1491 | } | |
2e84c60b | 1492 | tsk_advance_rx_queue(sk); |
c4307285 | 1493 | } |
b97bf3fd PL |
1494 | |
1495 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1496 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1497 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1498 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1499 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1500 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1501 | goto restart; |
1502 | ||
1503 | exit: | |
0c3141e9 | 1504 | release_sock(sk); |
a3b0a5a9 | 1505 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1506 | } |
1507 | ||
f288bef4 YX |
1508 | /** |
1509 | * tipc_write_space - wake up thread if port congestion is released | |
1510 | * @sk: socket | |
1511 | */ | |
1512 | static void tipc_write_space(struct sock *sk) | |
1513 | { | |
1514 | struct socket_wq *wq; | |
1515 | ||
1516 | rcu_read_lock(); | |
1517 | wq = rcu_dereference(sk->sk_wq); | |
1518 | if (wq_has_sleeper(wq)) | |
1519 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1520 | POLLWRNORM | POLLWRBAND); | |
1521 | rcu_read_unlock(); | |
1522 | } | |
1523 | ||
1524 | /** | |
1525 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1526 | * @sk: socket | |
1527 | * @len: the length of messages | |
1528 | */ | |
676d2369 | 1529 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1530 | { |
1531 | struct socket_wq *wq; | |
1532 | ||
1533 | rcu_read_lock(); | |
1534 | wq = rcu_dereference(sk->sk_wq); | |
1535 | if (wq_has_sleeper(wq)) | |
1536 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1537 | POLLRDNORM | POLLRDBAND); | |
1538 | rcu_read_unlock(); | |
1539 | } | |
1540 | ||
7e6c131e YX |
1541 | /** |
1542 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1543 | * @tsk: TIPC socket |
7e6c131e YX |
1544 | * @msg: message |
1545 | * | |
b2ad5e5f | 1546 | * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise |
7e6c131e | 1547 | */ |
e4de5fab | 1548 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **buf) |
7e6c131e | 1549 | { |
58ed9442 | 1550 | struct sock *sk = &tsk->sk; |
8826cde6 | 1551 | struct socket *sock = sk->sk_socket; |
7e6c131e | 1552 | struct tipc_msg *msg = buf_msg(*buf); |
e4de5fab | 1553 | int retval = -TIPC_ERR_NO_PORT; |
7e6c131e YX |
1554 | |
1555 | if (msg_mcast(msg)) | |
1556 | return retval; | |
1557 | ||
1558 | switch ((int)sock->state) { | |
1559 | case SS_CONNECTED: | |
1560 | /* Accept only connection-based messages sent by peer */ | |
2e84c60b | 1561 | if (tsk_peer_msg(tsk, msg)) { |
7e6c131e YX |
1562 | if (unlikely(msg_errcode(msg))) { |
1563 | sock->state = SS_DISCONNECTING; | |
301bae56 | 1564 | tsk->connected = 0; |
dadebc00 | 1565 | /* let timer expire on it's own */ |
301bae56 | 1566 | tipc_node_remove_conn(tsk_peer_node(tsk), |
07f6c4bc | 1567 | tsk->portid); |
7e6c131e YX |
1568 | } |
1569 | retval = TIPC_OK; | |
1570 | } | |
1571 | break; | |
1572 | case SS_CONNECTING: | |
1573 | /* Accept only ACK or NACK message */ | |
dadebc00 JPM |
1574 | |
1575 | if (unlikely(!msg_connected(msg))) | |
1576 | break; | |
1577 | ||
584d24b3 YX |
1578 | if (unlikely(msg_errcode(msg))) { |
1579 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1580 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1581 | retval = TIPC_OK; |
1582 | break; | |
1583 | } | |
1584 | ||
dadebc00 | 1585 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
584d24b3 | 1586 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1587 | sk->sk_err = EINVAL; |
7e6c131e | 1588 | retval = TIPC_OK; |
584d24b3 YX |
1589 | break; |
1590 | } | |
1591 | ||
301bae56 JPM |
1592 | tipc_sk_finish_conn(tsk, msg_origport(msg), msg_orignode(msg)); |
1593 | msg_set_importance(&tsk->phdr, msg_importance(msg)); | |
dadebc00 JPM |
1594 | sock->state = SS_CONNECTED; |
1595 | ||
584d24b3 YX |
1596 | /* If an incoming message is an 'ACK-', it should be |
1597 | * discarded here because it doesn't contain useful | |
1598 | * data. In addition, we should try to wake up | |
1599 | * connect() routine if sleeping. | |
1600 | */ | |
1601 | if (msg_data_sz(msg) == 0) { | |
1602 | kfree_skb(*buf); | |
1603 | *buf = NULL; | |
1604 | if (waitqueue_active(sk_sleep(sk))) | |
1605 | wake_up_interruptible(sk_sleep(sk)); | |
1606 | } | |
1607 | retval = TIPC_OK; | |
7e6c131e YX |
1608 | break; |
1609 | case SS_LISTENING: | |
1610 | case SS_UNCONNECTED: | |
1611 | /* Accept only SYN message */ | |
1612 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1613 | retval = TIPC_OK; | |
1614 | break; | |
1615 | case SS_DISCONNECTING: | |
1616 | break; | |
1617 | default: | |
1618 | pr_err("Unknown socket state %u\n", sock->state); | |
1619 | } | |
1620 | return retval; | |
1621 | } | |
1622 | ||
aba79f33 YX |
1623 | /** |
1624 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1625 | * @sk: socket | |
1626 | * @buf: message | |
1627 | * | |
1628 | * For all connection oriented messages, irrespective of importance, | |
1629 | * the default overload value (i.e. 67MB) is set as limit. | |
1630 | * | |
1631 | * For all connectionless messages, by default new queue limits are | |
1632 | * as belows: | |
1633 | * | |
cc79dd1b YX |
1634 | * TIPC_LOW_IMPORTANCE (4 MB) |
1635 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1636 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1637 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1638 | * |
1639 | * Returns overload limit according to corresponding message importance | |
1640 | */ | |
1641 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1642 | { | |
1643 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1644 | |
1645 | if (msg_connected(msg)) | |
0cee6bbe | 1646 | return sysctl_tipc_rmem[2]; |
1647 | ||
1648 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1649 | msg_importance(msg); | |
aba79f33 YX |
1650 | } |
1651 | ||
c4307285 | 1652 | /** |
0c3141e9 AS |
1653 | * filter_rcv - validate incoming message |
1654 | * @sk: socket | |
b97bf3fd | 1655 | * @buf: message |
c4307285 | 1656 | * |
0c3141e9 AS |
1657 | * Enqueues message on receive queue if acceptable; optionally handles |
1658 | * disconnect indication for a connected socket. | |
1659 | * | |
1660 | * Called with socket lock already taken; port lock may also be taken. | |
c4307285 | 1661 | * |
e4de5fab | 1662 | * Returns 0 (TIPC_OK) if message was consumed, -TIPC error code if message |
ac0074ee | 1663 | * to be rejected, 1 (TIPC_FWD_MSG) if (CONN_MANAGER) message to be forwarded |
b97bf3fd | 1664 | */ |
e4de5fab | 1665 | static int filter_rcv(struct sock *sk, struct sk_buff *buf) |
b97bf3fd | 1666 | { |
0c3141e9 | 1667 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1668 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd | 1669 | struct tipc_msg *msg = buf_msg(buf); |
aba79f33 | 1670 | unsigned int limit = rcvbuf_limit(sk, buf); |
ac0074ee | 1671 | u32 onode; |
e4de5fab | 1672 | int rc = TIPC_OK; |
b97bf3fd | 1673 | |
ac0074ee JPM |
1674 | if (unlikely(msg_user(msg) == CONN_MANAGER)) |
1675 | return tipc_sk_proto_rcv(tsk, &onode, buf); | |
ec8a2e56 | 1676 | |
50100a5e JPM |
1677 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
1678 | kfree_skb(buf); | |
1679 | tsk->link_cong = 0; | |
1680 | sk->sk_write_space(sk); | |
1681 | return TIPC_OK; | |
1682 | } | |
1683 | ||
b97bf3fd | 1684 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 | 1685 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
e4de5fab | 1686 | return -TIPC_ERR_NO_PORT; |
0c3141e9 | 1687 | |
b97bf3fd | 1688 | if (sock->state == SS_READY) { |
b29f1428 | 1689 | if (msg_connected(msg)) |
e4de5fab | 1690 | return -TIPC_ERR_NO_PORT; |
b97bf3fd | 1691 | } else { |
e4de5fab JPM |
1692 | rc = filter_connect(tsk, &buf); |
1693 | if (rc != TIPC_OK || buf == NULL) | |
1694 | return rc; | |
b97bf3fd PL |
1695 | } |
1696 | ||
1697 | /* Reject message if there isn't room to queue it */ | |
aba79f33 | 1698 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
e4de5fab | 1699 | return -TIPC_ERR_OVERLOAD; |
b97bf3fd | 1700 | |
aba79f33 | 1701 | /* Enqueue message */ |
40682432 | 1702 | TIPC_SKB_CB(buf)->handle = NULL; |
0c3141e9 | 1703 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
aba79f33 | 1704 | skb_set_owner_r(buf, sk); |
0c3141e9 | 1705 | |
676d2369 | 1706 | sk->sk_data_ready(sk); |
0c3141e9 AS |
1707 | return TIPC_OK; |
1708 | } | |
b97bf3fd | 1709 | |
0c3141e9 | 1710 | /** |
4f4482dc | 1711 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1712 | * @sk: socket |
a6ca1094 | 1713 | * @skb: message |
0c3141e9 AS |
1714 | * |
1715 | * Caller must hold socket lock, but not port lock. | |
1716 | * | |
1717 | * Returns 0 | |
1718 | */ | |
a6ca1094 | 1719 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1720 | { |
e4de5fab | 1721 | int rc; |
8db1bae3 | 1722 | u32 onode; |
4f4482dc | 1723 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 1724 | uint truesize = skb->truesize; |
0c3141e9 | 1725 | |
a6ca1094 | 1726 | rc = filter_rcv(sk, skb); |
4f4482dc | 1727 | |
ac0074ee JPM |
1728 | if (likely(!rc)) { |
1729 | if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT) | |
1730 | atomic_add(truesize, &tsk->dupl_rcvcnt); | |
1731 | return 0; | |
1732 | } | |
1733 | ||
a6ca1094 | 1734 | if ((rc < 0) && !tipc_msg_reverse(skb, &onode, -rc)) |
ac0074ee JPM |
1735 | return 0; |
1736 | ||
a6ca1094 | 1737 | tipc_link_xmit_skb(skb, onode, 0); |
4f4482dc | 1738 | |
0c3141e9 AS |
1739 | return 0; |
1740 | } | |
1741 | ||
1742 | /** | |
24be34b5 | 1743 | * tipc_sk_rcv - handle incoming message |
a6ca1094 | 1744 | * @skb: buffer containing arriving message |
9816f061 JPM |
1745 | * Consumes buffer |
1746 | * Returns 0 if success, or errno: -EHOSTUNREACH | |
0c3141e9 | 1747 | */ |
a6ca1094 | 1748 | int tipc_sk_rcv(struct sk_buff *skb) |
0c3141e9 | 1749 | { |
9816f061 | 1750 | struct tipc_sock *tsk; |
9816f061 | 1751 | struct sock *sk; |
a6ca1094 | 1752 | u32 dport = msg_destport(buf_msg(skb)); |
e4de5fab | 1753 | int rc = TIPC_OK; |
4f4482dc | 1754 | uint limit; |
8db1bae3 | 1755 | u32 dnode; |
9816f061 | 1756 | |
5a379074 | 1757 | /* Validate destination and message */ |
07f6c4bc | 1758 | tsk = tipc_sk_lookup(dport); |
9b50fd08 | 1759 | if (unlikely(!tsk)) { |
a6ca1094 | 1760 | rc = tipc_msg_eval(skb, &dnode); |
9816f061 JPM |
1761 | goto exit; |
1762 | } | |
9816f061 JPM |
1763 | sk = &tsk->sk; |
1764 | ||
1765 | /* Queue message */ | |
1a194c2d | 1766 | spin_lock_bh(&sk->sk_lock.slock); |
9816f061 | 1767 | |
0c3141e9 | 1768 | if (!sock_owned_by_user(sk)) { |
a6ca1094 | 1769 | rc = filter_rcv(sk, skb); |
0c3141e9 | 1770 | } else { |
4f4482dc JPM |
1771 | if (sk->sk_backlog.len == 0) |
1772 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
a6ca1094 YX |
1773 | limit = rcvbuf_limit(sk, skb) + atomic_read(&tsk->dupl_rcvcnt); |
1774 | if (sk_add_backlog(sk, skb, limit)) | |
e4de5fab | 1775 | rc = -TIPC_ERR_OVERLOAD; |
0c3141e9 | 1776 | } |
1a194c2d | 1777 | spin_unlock_bh(&sk->sk_lock.slock); |
07f6c4bc | 1778 | sock_put(sk); |
e4de5fab | 1779 | if (likely(!rc)) |
9816f061 JPM |
1780 | return 0; |
1781 | exit: | |
a6ca1094 | 1782 | if ((rc < 0) && !tipc_msg_reverse(skb, &dnode, -rc)) |
8db1bae3 | 1783 | return -EHOSTUNREACH; |
5a379074 | 1784 | |
a6ca1094 | 1785 | tipc_link_xmit_skb(skb, dnode, 0); |
5a379074 | 1786 | return (rc < 0) ? -EHOSTUNREACH : 0; |
b97bf3fd PL |
1787 | } |
1788 | ||
78eb3a53 YX |
1789 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1790 | { | |
1791 | struct sock *sk = sock->sk; | |
1792 | DEFINE_WAIT(wait); | |
1793 | int done; | |
1794 | ||
1795 | do { | |
1796 | int err = sock_error(sk); | |
1797 | if (err) | |
1798 | return err; | |
1799 | if (!*timeo_p) | |
1800 | return -ETIMEDOUT; | |
1801 | if (signal_pending(current)) | |
1802 | return sock_intr_errno(*timeo_p); | |
1803 | ||
1804 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1805 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1806 | finish_wait(sk_sleep(sk), &wait); | |
1807 | } while (!done); | |
1808 | return 0; | |
1809 | } | |
1810 | ||
b97bf3fd | 1811 | /** |
247f0f3c | 1812 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1813 | * @sock: socket structure |
1814 | * @dest: socket address for destination port | |
1815 | * @destlen: size of socket address data structure | |
0c3141e9 | 1816 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1817 | * |
1818 | * Returns 0 on success, errno otherwise | |
1819 | */ | |
247f0f3c YX |
1820 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1821 | int destlen, int flags) | |
b97bf3fd | 1822 | { |
0c3141e9 | 1823 | struct sock *sk = sock->sk; |
b89741a0 AS |
1824 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1825 | struct msghdr m = {NULL,}; | |
78eb3a53 YX |
1826 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
1827 | socket_state previous; | |
b89741a0 AS |
1828 | int res; |
1829 | ||
0c3141e9 AS |
1830 | lock_sock(sk); |
1831 | ||
b89741a0 | 1832 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
0c3141e9 AS |
1833 | if (sock->state == SS_READY) { |
1834 | res = -EOPNOTSUPP; | |
1835 | goto exit; | |
1836 | } | |
b89741a0 | 1837 | |
b89741a0 AS |
1838 | /* |
1839 | * Reject connection attempt using multicast address | |
1840 | * | |
1841 | * Note: send_msg() validates the rest of the address fields, | |
1842 | * so there's no need to do it here | |
1843 | */ | |
0c3141e9 AS |
1844 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1845 | res = -EINVAL; | |
1846 | goto exit; | |
1847 | } | |
1848 | ||
78eb3a53 | 1849 | previous = sock->state; |
584d24b3 YX |
1850 | switch (sock->state) { |
1851 | case SS_UNCONNECTED: | |
1852 | /* Send a 'SYN-' to destination */ | |
1853 | m.msg_name = dest; | |
1854 | m.msg_namelen = destlen; | |
1855 | ||
1856 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1857 | * indicate send_msg() is never blocked. | |
1858 | */ | |
1859 | if (!timeout) | |
1860 | m.msg_flags = MSG_DONTWAIT; | |
1861 | ||
247f0f3c | 1862 | res = tipc_sendmsg(NULL, sock, &m, 0); |
584d24b3 YX |
1863 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1864 | goto exit; | |
1865 | ||
1866 | /* Just entered SS_CONNECTING state; the only | |
1867 | * difference is that return value in non-blocking | |
1868 | * case is EINPROGRESS, rather than EALREADY. | |
1869 | */ | |
1870 | res = -EINPROGRESS; | |
584d24b3 | 1871 | case SS_CONNECTING: |
78eb3a53 YX |
1872 | if (previous == SS_CONNECTING) |
1873 | res = -EALREADY; | |
1874 | if (!timeout) | |
1875 | goto exit; | |
1876 | timeout = msecs_to_jiffies(timeout); | |
1877 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1878 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1879 | break; |
1880 | case SS_CONNECTED: | |
1881 | res = -EISCONN; | |
1882 | break; | |
1883 | default: | |
1884 | res = -EINVAL; | |
78eb3a53 | 1885 | break; |
b89741a0 | 1886 | } |
0c3141e9 AS |
1887 | exit: |
1888 | release_sock(sk); | |
b89741a0 | 1889 | return res; |
b97bf3fd PL |
1890 | } |
1891 | ||
c4307285 | 1892 | /** |
247f0f3c | 1893 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1894 | * @sock: socket structure |
1895 | * @len: (unused) | |
c4307285 | 1896 | * |
b97bf3fd PL |
1897 | * Returns 0 on success, errno otherwise |
1898 | */ | |
247f0f3c | 1899 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1900 | { |
0c3141e9 AS |
1901 | struct sock *sk = sock->sk; |
1902 | int res; | |
1903 | ||
1904 | lock_sock(sk); | |
b97bf3fd | 1905 | |
245f3d34 | 1906 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1907 | res = -EINVAL; |
1908 | else { | |
1909 | sock->state = SS_LISTENING; | |
1910 | res = 0; | |
1911 | } | |
1912 | ||
1913 | release_sock(sk); | |
1914 | return res; | |
b97bf3fd PL |
1915 | } |
1916 | ||
6398e23c YX |
1917 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1918 | { | |
1919 | struct sock *sk = sock->sk; | |
1920 | DEFINE_WAIT(wait); | |
1921 | int err; | |
1922 | ||
1923 | /* True wake-one mechanism for incoming connections: only | |
1924 | * one process gets woken up, not the 'whole herd'. | |
1925 | * Since we do not 'race & poll' for established sockets | |
1926 | * anymore, the common case will execute the loop only once. | |
1927 | */ | |
1928 | for (;;) { | |
1929 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1930 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1931 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1932 | release_sock(sk); |
1933 | timeo = schedule_timeout(timeo); | |
1934 | lock_sock(sk); | |
1935 | } | |
1936 | err = 0; | |
1937 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1938 | break; | |
1939 | err = -EINVAL; | |
1940 | if (sock->state != SS_LISTENING) | |
1941 | break; | |
1942 | err = sock_intr_errno(timeo); | |
1943 | if (signal_pending(current)) | |
1944 | break; | |
1945 | err = -EAGAIN; | |
1946 | if (!timeo) | |
1947 | break; | |
1948 | } | |
1949 | finish_wait(sk_sleep(sk), &wait); | |
1950 | return err; | |
1951 | } | |
1952 | ||
c4307285 | 1953 | /** |
247f0f3c | 1954 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1955 | * @sock: listening socket |
1956 | * @newsock: new socket that is to be connected | |
1957 | * @flags: file-related flags associated with socket | |
c4307285 | 1958 | * |
b97bf3fd PL |
1959 | * Returns 0 on success, errno otherwise |
1960 | */ | |
247f0f3c | 1961 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1962 | { |
0fef8f20 | 1963 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1964 | struct sk_buff *buf; |
301bae56 | 1965 | struct tipc_sock *new_tsock; |
0fef8f20 | 1966 | struct tipc_msg *msg; |
6398e23c | 1967 | long timeo; |
0c3141e9 | 1968 | int res; |
b97bf3fd | 1969 | |
0c3141e9 | 1970 | lock_sock(sk); |
b97bf3fd | 1971 | |
0c3141e9 AS |
1972 | if (sock->state != SS_LISTENING) { |
1973 | res = -EINVAL; | |
b97bf3fd PL |
1974 | goto exit; |
1975 | } | |
6398e23c YX |
1976 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
1977 | res = tipc_wait_for_accept(sock, timeo); | |
1978 | if (res) | |
1979 | goto exit; | |
0c3141e9 AS |
1980 | |
1981 | buf = skb_peek(&sk->sk_receive_queue); | |
1982 | ||
c5fa7b3c | 1983 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
1984 | if (res) |
1985 | goto exit; | |
b97bf3fd | 1986 | |
0fef8f20 | 1987 | new_sk = new_sock->sk; |
301bae56 | 1988 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 1989 | msg = buf_msg(buf); |
b97bf3fd | 1990 | |
0fef8f20 PG |
1991 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
1992 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
1993 | ||
1994 | /* | |
1995 | * Reject any stray messages received by new socket | |
1996 | * before the socket lock was taken (very, very unlikely) | |
1997 | */ | |
2e84c60b | 1998 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
1999 | |
2000 | /* Connect new socket to it's peer */ | |
301bae56 | 2001 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2002 | new_sock->state = SS_CONNECTED; |
2003 | ||
301bae56 | 2004 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2005 | if (msg_named(msg)) { |
301bae56 JPM |
2006 | new_tsock->conn_type = msg_nametype(msg); |
2007 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2008 | } |
0fef8f20 PG |
2009 | |
2010 | /* | |
2011 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2012 | * Respond to 'SYN+' by queuing it on new socket. | |
2013 | */ | |
2014 | if (!msg_data_sz(msg)) { | |
2015 | struct msghdr m = {NULL,}; | |
2016 | ||
2e84c60b | 2017 | tsk_advance_rx_queue(sk); |
247f0f3c | 2018 | tipc_send_packet(NULL, new_sock, &m, 0); |
0fef8f20 PG |
2019 | } else { |
2020 | __skb_dequeue(&sk->sk_receive_queue); | |
2021 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2022 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2023 | } |
2024 | release_sock(new_sk); | |
b97bf3fd | 2025 | exit: |
0c3141e9 | 2026 | release_sock(sk); |
b97bf3fd PL |
2027 | return res; |
2028 | } | |
2029 | ||
2030 | /** | |
247f0f3c | 2031 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2032 | * @sock: socket structure |
e247a8f5 | 2033 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2034 | * |
2035 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2036 | * |
b97bf3fd PL |
2037 | * Returns 0 on success, errno otherwise |
2038 | */ | |
247f0f3c | 2039 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2040 | { |
0c3141e9 | 2041 | struct sock *sk = sock->sk; |
58ed9442 | 2042 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2043 | struct sk_buff *skb; |
80e44c22 | 2044 | u32 dnode; |
b97bf3fd PL |
2045 | int res; |
2046 | ||
e247a8f5 AS |
2047 | if (how != SHUT_RDWR) |
2048 | return -EINVAL; | |
b97bf3fd | 2049 | |
0c3141e9 | 2050 | lock_sock(sk); |
b97bf3fd PL |
2051 | |
2052 | switch (sock->state) { | |
0c3141e9 | 2053 | case SS_CONNECTING: |
b97bf3fd PL |
2054 | case SS_CONNECTED: |
2055 | ||
b97bf3fd | 2056 | restart: |
617d3c7a | 2057 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2058 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2059 | if (skb) { | |
2060 | if (TIPC_SKB_CB(skb)->handle != NULL) { | |
2061 | kfree_skb(skb); | |
b97bf3fd PL |
2062 | goto restart; |
2063 | } | |
a6ca1094 | 2064 | if (tipc_msg_reverse(skb, &dnode, TIPC_CONN_SHUTDOWN)) |
07f6c4bc YX |
2065 | tipc_link_xmit_skb(skb, dnode, tsk->portid); |
2066 | tipc_node_remove_conn(dnode, tsk->portid); | |
0c3141e9 | 2067 | } else { |
301bae56 | 2068 | dnode = tsk_peer_node(tsk); |
a6ca1094 | 2069 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
80e44c22 JPM |
2070 | TIPC_CONN_MSG, SHORT_H_SIZE, |
2071 | 0, dnode, tipc_own_addr, | |
301bae56 | 2072 | tsk_peer_port(tsk), |
07f6c4bc YX |
2073 | tsk->portid, TIPC_CONN_SHUTDOWN); |
2074 | tipc_link_xmit_skb(skb, dnode, tsk->portid); | |
b97bf3fd | 2075 | } |
301bae56 | 2076 | tsk->connected = 0; |
0c3141e9 | 2077 | sock->state = SS_DISCONNECTING; |
07f6c4bc | 2078 | tipc_node_remove_conn(dnode, tsk->portid); |
b97bf3fd PL |
2079 | /* fall through */ |
2080 | ||
2081 | case SS_DISCONNECTING: | |
2082 | ||
75031151 | 2083 | /* Discard any unreceived messages */ |
57467e56 | 2084 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2085 | |
2086 | /* Wake up anyone sleeping in poll */ | |
2087 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2088 | res = 0; |
2089 | break; | |
2090 | ||
2091 | default: | |
2092 | res = -ENOTCONN; | |
2093 | } | |
2094 | ||
0c3141e9 | 2095 | release_sock(sk); |
b97bf3fd PL |
2096 | return res; |
2097 | } | |
2098 | ||
07f6c4bc | 2099 | static void tipc_sk_timeout(unsigned long portid) |
57289015 | 2100 | { |
6c9808ce | 2101 | struct tipc_sock *tsk; |
57289015 | 2102 | struct sock *sk; |
a6ca1094 | 2103 | struct sk_buff *skb = NULL; |
57289015 JPM |
2104 | u32 peer_port, peer_node; |
2105 | ||
07f6c4bc | 2106 | tsk = tipc_sk_lookup(portid); |
9b50fd08 | 2107 | if (!tsk) |
cc086fcf | 2108 | return; |
6c9808ce | 2109 | |
cc086fcf | 2110 | sk = &tsk->sk; |
6c9808ce | 2111 | bh_lock_sock(sk); |
301bae56 | 2112 | if (!tsk->connected) { |
6c9808ce JPM |
2113 | bh_unlock_sock(sk); |
2114 | goto exit; | |
57289015 | 2115 | } |
301bae56 JPM |
2116 | peer_port = tsk_peer_port(tsk); |
2117 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2118 | |
301bae56 | 2119 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
57289015 | 2120 | /* Previous probe not answered -> self abort */ |
a6ca1094 | 2121 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, |
57289015 | 2122 | SHORT_H_SIZE, 0, tipc_own_addr, |
07f6c4bc | 2123 | peer_node, portid, peer_port, |
57289015 JPM |
2124 | TIPC_ERR_NO_PORT); |
2125 | } else { | |
a6ca1094 | 2126 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, |
57289015 | 2127 | 0, peer_node, tipc_own_addr, |
07f6c4bc | 2128 | peer_port, portid, TIPC_OK); |
301bae56 | 2129 | tsk->probing_state = TIPC_CONN_PROBING; |
2f55c437 | 2130 | mod_timer(&tsk->timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2131 | } |
2132 | bh_unlock_sock(sk); | |
a6ca1094 | 2133 | if (skb) |
07f6c4bc | 2134 | tipc_link_xmit_skb(skb, peer_node, portid); |
6c9808ce | 2135 | exit: |
07f6c4bc | 2136 | sock_put(sk); |
57289015 JPM |
2137 | } |
2138 | ||
301bae56 | 2139 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2140 | struct tipc_name_seq const *seq) |
2141 | { | |
2142 | struct publication *publ; | |
2143 | u32 key; | |
2144 | ||
301bae56 | 2145 | if (tsk->connected) |
0fc87aae | 2146 | return -EINVAL; |
07f6c4bc YX |
2147 | key = tsk->portid + tsk->pub_count + 1; |
2148 | if (key == tsk->portid) | |
0fc87aae JPM |
2149 | return -EADDRINUSE; |
2150 | ||
2151 | publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper, | |
07f6c4bc | 2152 | scope, tsk->portid, key); |
0fc87aae JPM |
2153 | if (unlikely(!publ)) |
2154 | return -EINVAL; | |
2155 | ||
301bae56 JPM |
2156 | list_add(&publ->pport_list, &tsk->publications); |
2157 | tsk->pub_count++; | |
2158 | tsk->published = 1; | |
0fc87aae JPM |
2159 | return 0; |
2160 | } | |
2161 | ||
301bae56 | 2162 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2163 | struct tipc_name_seq const *seq) |
2164 | { | |
2165 | struct publication *publ; | |
2166 | struct publication *safe; | |
2167 | int rc = -EINVAL; | |
2168 | ||
301bae56 | 2169 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2170 | if (seq) { |
2171 | if (publ->scope != scope) | |
2172 | continue; | |
2173 | if (publ->type != seq->type) | |
2174 | continue; | |
2175 | if (publ->lower != seq->lower) | |
2176 | continue; | |
2177 | if (publ->upper != seq->upper) | |
2178 | break; | |
2179 | tipc_nametbl_withdraw(publ->type, publ->lower, | |
2180 | publ->ref, publ->key); | |
2181 | rc = 0; | |
2182 | break; | |
2183 | } | |
2184 | tipc_nametbl_withdraw(publ->type, publ->lower, | |
2185 | publ->ref, publ->key); | |
2186 | rc = 0; | |
2187 | } | |
301bae56 JPM |
2188 | if (list_empty(&tsk->publications)) |
2189 | tsk->published = 0; | |
0fc87aae JPM |
2190 | return rc; |
2191 | } | |
2192 | ||
301bae56 | 2193 | static int tipc_sk_show(struct tipc_sock *tsk, char *buf, |
5a9ee0be JPM |
2194 | int len, int full_id) |
2195 | { | |
2196 | struct publication *publ; | |
2197 | int ret; | |
2198 | ||
2199 | if (full_id) | |
2200 | ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:", | |
2201 | tipc_zone(tipc_own_addr), | |
2202 | tipc_cluster(tipc_own_addr), | |
07f6c4bc | 2203 | tipc_node(tipc_own_addr), tsk->portid); |
5a9ee0be | 2204 | else |
07f6c4bc | 2205 | ret = tipc_snprintf(buf, len, "%-10u:", tsk->portid); |
5a9ee0be | 2206 | |
301bae56 JPM |
2207 | if (tsk->connected) { |
2208 | u32 dport = tsk_peer_port(tsk); | |
2209 | u32 destnode = tsk_peer_node(tsk); | |
5a9ee0be JPM |
2210 | |
2211 | ret += tipc_snprintf(buf + ret, len - ret, | |
2212 | " connected to <%u.%u.%u:%u>", | |
2213 | tipc_zone(destnode), | |
2214 | tipc_cluster(destnode), | |
2215 | tipc_node(destnode), dport); | |
301bae56 | 2216 | if (tsk->conn_type != 0) |
5a9ee0be | 2217 | ret += tipc_snprintf(buf + ret, len - ret, |
301bae56 JPM |
2218 | " via {%u,%u}", tsk->conn_type, |
2219 | tsk->conn_instance); | |
2220 | } else if (tsk->published) { | |
5a9ee0be | 2221 | ret += tipc_snprintf(buf + ret, len - ret, " bound to"); |
301bae56 | 2222 | list_for_each_entry(publ, &tsk->publications, pport_list) { |
5a9ee0be JPM |
2223 | if (publ->lower == publ->upper) |
2224 | ret += tipc_snprintf(buf + ret, len - ret, | |
2225 | " {%u,%u}", publ->type, | |
2226 | publ->lower); | |
2227 | else | |
2228 | ret += tipc_snprintf(buf + ret, len - ret, | |
2229 | " {%u,%u,%u}", publ->type, | |
2230 | publ->lower, publ->upper); | |
2231 | } | |
2232 | } | |
2233 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); | |
2234 | return ret; | |
2235 | } | |
2236 | ||
2237 | struct sk_buff *tipc_sk_socks_show(void) | |
2238 | { | |
07f6c4bc YX |
2239 | const struct bucket_table *tbl; |
2240 | struct rhash_head *pos; | |
5a9ee0be JPM |
2241 | struct sk_buff *buf; |
2242 | struct tlv_desc *rep_tlv; | |
2243 | char *pb; | |
2244 | int pb_len; | |
2245 | struct tipc_sock *tsk; | |
2246 | int str_len = 0; | |
07f6c4bc | 2247 | int i; |
5a9ee0be JPM |
2248 | |
2249 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); | |
2250 | if (!buf) | |
2251 | return NULL; | |
2252 | rep_tlv = (struct tlv_desc *)buf->data; | |
2253 | pb = TLV_DATA(rep_tlv); | |
2254 | pb_len = ULTRA_STRING_MAX_LEN; | |
2255 | ||
07f6c4bc YX |
2256 | rcu_read_lock(); |
2257 | tbl = rht_dereference_rcu((&tipc_sk_rht)->tbl, &tipc_sk_rht); | |
2258 | for (i = 0; i < tbl->size; i++) { | |
2259 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2260 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2261 | str_len += tipc_sk_show(tsk, pb + str_len, | |
2262 | pb_len - str_len, 0); | |
2263 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2264 | } | |
5a9ee0be | 2265 | } |
07f6c4bc YX |
2266 | rcu_read_unlock(); |
2267 | ||
5a9ee0be JPM |
2268 | str_len += 1; /* for "\0" */ |
2269 | skb_put(buf, TLV_SPACE(str_len)); | |
2270 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); | |
2271 | ||
2272 | return buf; | |
2273 | } | |
2274 | ||
2275 | /* tipc_sk_reinit: set non-zero address in all existing sockets | |
2276 | * when we go from standalone to network mode. | |
2277 | */ | |
2278 | void tipc_sk_reinit(void) | |
2279 | { | |
07f6c4bc YX |
2280 | const struct bucket_table *tbl; |
2281 | struct rhash_head *pos; | |
2282 | struct tipc_sock *tsk; | |
5a9ee0be | 2283 | struct tipc_msg *msg; |
07f6c4bc | 2284 | int i; |
5a9ee0be | 2285 | |
07f6c4bc YX |
2286 | rcu_read_lock(); |
2287 | tbl = rht_dereference_rcu((&tipc_sk_rht)->tbl, &tipc_sk_rht); | |
2288 | for (i = 0; i < tbl->size; i++) { | |
2289 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2290 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2291 | msg = &tsk->phdr; | |
2292 | msg_set_prevnode(msg, tipc_own_addr); | |
2293 | msg_set_orignode(msg, tipc_own_addr); | |
2294 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2295 | } | |
5a9ee0be | 2296 | } |
07f6c4bc | 2297 | rcu_read_unlock(); |
5a9ee0be JPM |
2298 | } |
2299 | ||
07f6c4bc | 2300 | static struct tipc_sock *tipc_sk_lookup(u32 portid) |
808d90f9 | 2301 | { |
07f6c4bc | 2302 | struct tipc_sock *tsk; |
808d90f9 | 2303 | |
07f6c4bc YX |
2304 | rcu_read_lock(); |
2305 | tsk = rhashtable_lookup(&tipc_sk_rht, &portid); | |
2306 | if (tsk) | |
2307 | sock_hold(&tsk->sk); | |
2308 | rcu_read_unlock(); | |
808d90f9 | 2309 | |
07f6c4bc | 2310 | return tsk; |
808d90f9 JPM |
2311 | } |
2312 | ||
07f6c4bc | 2313 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2314 | { |
07f6c4bc YX |
2315 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2316 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2317 | |
07f6c4bc YX |
2318 | while (remaining--) { |
2319 | portid++; | |
2320 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2321 | portid = TIPC_MIN_PORT; | |
2322 | tsk->portid = portid; | |
2323 | sock_hold(&tsk->sk); | |
2324 | if (rhashtable_lookup_insert(&tipc_sk_rht, &tsk->node)) | |
2325 | return 0; | |
2326 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2327 | } |
2328 | ||
07f6c4bc | 2329 | return -1; |
808d90f9 JPM |
2330 | } |
2331 | ||
07f6c4bc | 2332 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2333 | { |
07f6c4bc | 2334 | struct sock *sk = &tsk->sk; |
808d90f9 | 2335 | |
07f6c4bc YX |
2336 | if (rhashtable_remove(&tipc_sk_rht, &tsk->node)) { |
2337 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); | |
2338 | __sock_put(sk); | |
808d90f9 | 2339 | } |
808d90f9 JPM |
2340 | } |
2341 | ||
07f6c4bc | 2342 | int tipc_sk_rht_init(void) |
808d90f9 | 2343 | { |
07f6c4bc YX |
2344 | struct rhashtable_params rht_params = { |
2345 | .nelem_hint = 192, | |
2346 | .head_offset = offsetof(struct tipc_sock, node), | |
2347 | .key_offset = offsetof(struct tipc_sock, portid), | |
2348 | .key_len = sizeof(u32), /* portid */ | |
2349 | .hashfn = jhash, | |
2350 | .max_shift = 20, /* 1M */ | |
2351 | .min_shift = 8, /* 256 */ | |
2352 | .grow_decision = rht_grow_above_75, | |
2353 | .shrink_decision = rht_shrink_below_30, | |
2354 | }; | |
808d90f9 | 2355 | |
07f6c4bc | 2356 | return rhashtable_init(&tipc_sk_rht, &rht_params); |
808d90f9 JPM |
2357 | } |
2358 | ||
07f6c4bc | 2359 | void tipc_sk_rht_destroy(void) |
808d90f9 | 2360 | { |
07f6c4bc YX |
2361 | /* Wait for socket readers to complete */ |
2362 | synchronize_net(); | |
808d90f9 | 2363 | |
07f6c4bc | 2364 | rhashtable_destroy(&tipc_sk_rht); |
808d90f9 JPM |
2365 | } |
2366 | ||
b97bf3fd | 2367 | /** |
247f0f3c | 2368 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2369 | * @sock: socket structure |
2370 | * @lvl: option level | |
2371 | * @opt: option identifier | |
2372 | * @ov: pointer to new option value | |
2373 | * @ol: length of option value | |
c4307285 YH |
2374 | * |
2375 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2376 | * (to ease compatibility). |
c4307285 | 2377 | * |
b97bf3fd PL |
2378 | * Returns 0 on success, errno otherwise |
2379 | */ | |
247f0f3c YX |
2380 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2381 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2382 | { |
0c3141e9 | 2383 | struct sock *sk = sock->sk; |
58ed9442 | 2384 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2385 | u32 value; |
2386 | int res; | |
2387 | ||
c4307285 YH |
2388 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2389 | return 0; | |
b97bf3fd PL |
2390 | if (lvl != SOL_TIPC) |
2391 | return -ENOPROTOOPT; | |
2392 | if (ol < sizeof(value)) | |
2393 | return -EINVAL; | |
2db9983a AS |
2394 | res = get_user(value, (u32 __user *)ov); |
2395 | if (res) | |
b97bf3fd PL |
2396 | return res; |
2397 | ||
0c3141e9 | 2398 | lock_sock(sk); |
c4307285 | 2399 | |
b97bf3fd PL |
2400 | switch (opt) { |
2401 | case TIPC_IMPORTANCE: | |
301bae56 | 2402 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2403 | break; |
2404 | case TIPC_SRC_DROPPABLE: | |
2405 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2406 | tsk_set_unreliable(tsk, value); |
c4307285 | 2407 | else |
b97bf3fd PL |
2408 | res = -ENOPROTOOPT; |
2409 | break; | |
2410 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2411 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2412 | break; |
2413 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2414 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2415 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2416 | break; |
2417 | default: | |
2418 | res = -EINVAL; | |
2419 | } | |
2420 | ||
0c3141e9 AS |
2421 | release_sock(sk); |
2422 | ||
b97bf3fd PL |
2423 | return res; |
2424 | } | |
2425 | ||
2426 | /** | |
247f0f3c | 2427 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2428 | * @sock: socket structure |
2429 | * @lvl: option level | |
2430 | * @opt: option identifier | |
2431 | * @ov: receptacle for option value | |
2432 | * @ol: receptacle for length of option value | |
c4307285 YH |
2433 | * |
2434 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2435 | * (to ease compatibility). |
c4307285 | 2436 | * |
b97bf3fd PL |
2437 | * Returns 0 on success, errno otherwise |
2438 | */ | |
247f0f3c YX |
2439 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2440 | char __user *ov, int __user *ol) | |
b97bf3fd | 2441 | { |
0c3141e9 | 2442 | struct sock *sk = sock->sk; |
58ed9442 | 2443 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2444 | int len; |
b97bf3fd | 2445 | u32 value; |
c4307285 | 2446 | int res; |
b97bf3fd | 2447 | |
c4307285 YH |
2448 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2449 | return put_user(0, ol); | |
b97bf3fd PL |
2450 | if (lvl != SOL_TIPC) |
2451 | return -ENOPROTOOPT; | |
2db9983a AS |
2452 | res = get_user(len, ol); |
2453 | if (res) | |
c4307285 | 2454 | return res; |
b97bf3fd | 2455 | |
0c3141e9 | 2456 | lock_sock(sk); |
b97bf3fd PL |
2457 | |
2458 | switch (opt) { | |
2459 | case TIPC_IMPORTANCE: | |
301bae56 | 2460 | value = tsk_importance(tsk); |
b97bf3fd PL |
2461 | break; |
2462 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2463 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2464 | break; |
2465 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2466 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2467 | break; |
2468 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2469 | value = tsk->conn_timeout; |
0c3141e9 | 2470 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2471 | break; |
0e65967e | 2472 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2473 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2474 | break; |
0e65967e | 2475 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2476 | value = skb_queue_len(&sk->sk_receive_queue); |
2477 | break; | |
b97bf3fd PL |
2478 | default: |
2479 | res = -EINVAL; | |
2480 | } | |
2481 | ||
0c3141e9 AS |
2482 | release_sock(sk); |
2483 | ||
25860c3b PG |
2484 | if (res) |
2485 | return res; /* "get" failed */ | |
b97bf3fd | 2486 | |
25860c3b PG |
2487 | if (len < sizeof(value)) |
2488 | return -EINVAL; | |
2489 | ||
2490 | if (copy_to_user(ov, &value, sizeof(value))) | |
2491 | return -EFAULT; | |
2492 | ||
2493 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2494 | } |
2495 | ||
52f50ce5 | 2496 | static int tipc_ioctl(struct socket *sk, unsigned int cmd, unsigned long arg) |
78acb1f9 EH |
2497 | { |
2498 | struct tipc_sioc_ln_req lnr; | |
2499 | void __user *argp = (void __user *)arg; | |
2500 | ||
2501 | switch (cmd) { | |
2502 | case SIOCGETLINKNAME: | |
2503 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2504 | return -EFAULT; | |
7b8613e0 | 2505 | if (!tipc_node_get_linkname(lnr.bearer_id & 0xffff, lnr.peer, |
78acb1f9 EH |
2506 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2507 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2508 | return -EFAULT; | |
2509 | return 0; | |
2510 | } | |
2511 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2512 | default: |
2513 | return -ENOIOCTLCMD; | |
2514 | } | |
2515 | } | |
2516 | ||
ae86b9e3 BH |
2517 | /* Protocol switches for the various types of TIPC sockets */ |
2518 | ||
bca65eae | 2519 | static const struct proto_ops msg_ops = { |
0e65967e | 2520 | .owner = THIS_MODULE, |
b97bf3fd | 2521 | .family = AF_TIPC, |
247f0f3c YX |
2522 | .release = tipc_release, |
2523 | .bind = tipc_bind, | |
2524 | .connect = tipc_connect, | |
5eee6a6d | 2525 | .socketpair = sock_no_socketpair, |
245f3d34 | 2526 | .accept = sock_no_accept, |
247f0f3c YX |
2527 | .getname = tipc_getname, |
2528 | .poll = tipc_poll, | |
78acb1f9 | 2529 | .ioctl = tipc_ioctl, |
245f3d34 | 2530 | .listen = sock_no_listen, |
247f0f3c YX |
2531 | .shutdown = tipc_shutdown, |
2532 | .setsockopt = tipc_setsockopt, | |
2533 | .getsockopt = tipc_getsockopt, | |
2534 | .sendmsg = tipc_sendmsg, | |
2535 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2536 | .mmap = sock_no_mmap, |
2537 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2538 | }; |
2539 | ||
bca65eae | 2540 | static const struct proto_ops packet_ops = { |
0e65967e | 2541 | .owner = THIS_MODULE, |
b97bf3fd | 2542 | .family = AF_TIPC, |
247f0f3c YX |
2543 | .release = tipc_release, |
2544 | .bind = tipc_bind, | |
2545 | .connect = tipc_connect, | |
5eee6a6d | 2546 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2547 | .accept = tipc_accept, |
2548 | .getname = tipc_getname, | |
2549 | .poll = tipc_poll, | |
78acb1f9 | 2550 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2551 | .listen = tipc_listen, |
2552 | .shutdown = tipc_shutdown, | |
2553 | .setsockopt = tipc_setsockopt, | |
2554 | .getsockopt = tipc_getsockopt, | |
2555 | .sendmsg = tipc_send_packet, | |
2556 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2557 | .mmap = sock_no_mmap, |
2558 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2559 | }; |
2560 | ||
bca65eae | 2561 | static const struct proto_ops stream_ops = { |
0e65967e | 2562 | .owner = THIS_MODULE, |
b97bf3fd | 2563 | .family = AF_TIPC, |
247f0f3c YX |
2564 | .release = tipc_release, |
2565 | .bind = tipc_bind, | |
2566 | .connect = tipc_connect, | |
5eee6a6d | 2567 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2568 | .accept = tipc_accept, |
2569 | .getname = tipc_getname, | |
2570 | .poll = tipc_poll, | |
78acb1f9 | 2571 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2572 | .listen = tipc_listen, |
2573 | .shutdown = tipc_shutdown, | |
2574 | .setsockopt = tipc_setsockopt, | |
2575 | .getsockopt = tipc_getsockopt, | |
2576 | .sendmsg = tipc_send_stream, | |
2577 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2578 | .mmap = sock_no_mmap, |
2579 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2580 | }; |
2581 | ||
bca65eae | 2582 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2583 | .owner = THIS_MODULE, |
b97bf3fd | 2584 | .family = AF_TIPC, |
c5fa7b3c | 2585 | .create = tipc_sk_create |
b97bf3fd PL |
2586 | }; |
2587 | ||
2588 | static struct proto tipc_proto = { | |
2589 | .name = "TIPC", | |
2590 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2591 | .obj_size = sizeof(struct tipc_sock), |
2592 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2593 | }; |
2594 | ||
c5fa7b3c YX |
2595 | static struct proto tipc_proto_kern = { |
2596 | .name = "TIPC", | |
2597 | .obj_size = sizeof(struct tipc_sock), | |
2598 | .sysctl_rmem = sysctl_tipc_rmem | |
2599 | }; | |
2600 | ||
b97bf3fd | 2601 | /** |
4323add6 | 2602 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2603 | * |
b97bf3fd PL |
2604 | * Returns 0 on success, errno otherwise |
2605 | */ | |
4323add6 | 2606 | int tipc_socket_init(void) |
b97bf3fd PL |
2607 | { |
2608 | int res; | |
2609 | ||
c4307285 | 2610 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2611 | if (res) { |
2cf8aa19 | 2612 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2613 | goto out; |
2614 | } | |
2615 | ||
2616 | res = sock_register(&tipc_family_ops); | |
2617 | if (res) { | |
2cf8aa19 | 2618 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2619 | proto_unregister(&tipc_proto); |
2620 | goto out; | |
2621 | } | |
b97bf3fd PL |
2622 | out: |
2623 | return res; | |
2624 | } | |
2625 | ||
2626 | /** | |
4323add6 | 2627 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2628 | */ |
4323add6 | 2629 | void tipc_socket_stop(void) |
b97bf3fd | 2630 | { |
b97bf3fd PL |
2631 | sock_unregister(tipc_family_ops.family); |
2632 | proto_unregister(&tipc_proto); | |
2633 | } | |
34b78a12 RA |
2634 | |
2635 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2636 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2637 | { |
2638 | u32 peer_node; | |
2639 | u32 peer_port; | |
2640 | struct nlattr *nest; | |
2641 | ||
2642 | peer_node = tsk_peer_node(tsk); | |
2643 | peer_port = tsk_peer_port(tsk); | |
2644 | ||
2645 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2646 | ||
2647 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2648 | goto msg_full; | |
2649 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2650 | goto msg_full; | |
2651 | ||
2652 | if (tsk->conn_type != 0) { | |
2653 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2654 | goto msg_full; | |
2655 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2656 | goto msg_full; | |
2657 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2658 | goto msg_full; | |
2659 | } | |
2660 | nla_nest_end(skb, nest); | |
2661 | ||
2662 | return 0; | |
2663 | ||
2664 | msg_full: | |
2665 | nla_nest_cancel(skb, nest); | |
2666 | ||
2667 | return -EMSGSIZE; | |
2668 | } | |
2669 | ||
2670 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2671 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2672 | struct tipc_sock *tsk) | |
34b78a12 RA |
2673 | { |
2674 | int err; | |
2675 | void *hdr; | |
2676 | struct nlattr *attrs; | |
2677 | ||
2678 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2679 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); | |
2680 | if (!hdr) | |
2681 | goto msg_cancel; | |
2682 | ||
2683 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2684 | if (!attrs) | |
2685 | goto genlmsg_cancel; | |
07f6c4bc | 2686 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 RA |
2687 | goto attr_msg_cancel; |
2688 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tipc_own_addr)) | |
2689 | goto attr_msg_cancel; | |
2690 | ||
2691 | if (tsk->connected) { | |
2692 | err = __tipc_nl_add_sk_con(skb, tsk); | |
2693 | if (err) | |
2694 | goto attr_msg_cancel; | |
2695 | } else if (!list_empty(&tsk->publications)) { | |
2696 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2697 | goto attr_msg_cancel; | |
2698 | } | |
2699 | nla_nest_end(skb, attrs); | |
2700 | genlmsg_end(skb, hdr); | |
2701 | ||
2702 | return 0; | |
2703 | ||
2704 | attr_msg_cancel: | |
2705 | nla_nest_cancel(skb, attrs); | |
2706 | genlmsg_cancel: | |
2707 | genlmsg_cancel(skb, hdr); | |
2708 | msg_cancel: | |
2709 | return -EMSGSIZE; | |
2710 | } | |
2711 | ||
2712 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2713 | { | |
2714 | int err; | |
2715 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2716 | const struct bucket_table *tbl; |
2717 | struct rhash_head *pos; | |
2718 | u32 prev_portid = cb->args[0]; | |
2719 | u32 portid = prev_portid; | |
2720 | int i; | |
34b78a12 | 2721 | |
07f6c4bc YX |
2722 | rcu_read_lock(); |
2723 | tbl = rht_dereference_rcu((&tipc_sk_rht)->tbl, &tipc_sk_rht); | |
2724 | for (i = 0; i < tbl->size; i++) { | |
2725 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2726 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2727 | portid = tsk->portid; | |
2728 | err = __tipc_nl_add_sk(skb, cb, tsk); | |
2729 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2730 | if (err) | |
2731 | break; | |
2732 | ||
2733 | prev_portid = portid; | |
2734 | } | |
34b78a12 | 2735 | } |
07f6c4bc | 2736 | rcu_read_unlock(); |
34b78a12 | 2737 | |
07f6c4bc | 2738 | cb->args[0] = prev_portid; |
34b78a12 RA |
2739 | |
2740 | return skb->len; | |
2741 | } | |
1a1a143d RA |
2742 | |
2743 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2744 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2745 | struct netlink_callback *cb, | |
2746 | struct publication *publ) | |
1a1a143d RA |
2747 | { |
2748 | void *hdr; | |
2749 | struct nlattr *attrs; | |
2750 | ||
2751 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
2752 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); | |
2753 | if (!hdr) | |
2754 | goto msg_cancel; | |
2755 | ||
2756 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2757 | if (!attrs) | |
2758 | goto genlmsg_cancel; | |
2759 | ||
2760 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2761 | goto attr_msg_cancel; | |
2762 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2763 | goto attr_msg_cancel; | |
2764 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2765 | goto attr_msg_cancel; | |
2766 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2767 | goto attr_msg_cancel; | |
2768 | ||
2769 | nla_nest_end(skb, attrs); | |
2770 | genlmsg_end(skb, hdr); | |
2771 | ||
2772 | return 0; | |
2773 | ||
2774 | attr_msg_cancel: | |
2775 | nla_nest_cancel(skb, attrs); | |
2776 | genlmsg_cancel: | |
2777 | genlmsg_cancel(skb, hdr); | |
2778 | msg_cancel: | |
2779 | return -EMSGSIZE; | |
2780 | } | |
2781 | ||
2782 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2783 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2784 | struct netlink_callback *cb, | |
2785 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2786 | { |
2787 | int err; | |
2788 | struct publication *p; | |
2789 | ||
2790 | if (*last_publ) { | |
2791 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2792 | if (p->key == *last_publ) | |
2793 | break; | |
2794 | } | |
2795 | if (p->key != *last_publ) { | |
2796 | /* We never set seq or call nl_dump_check_consistent() | |
2797 | * this means that setting prev_seq here will cause the | |
2798 | * consistence check to fail in the netlink callback | |
2799 | * handler. Resulting in the last NLMSG_DONE message | |
2800 | * having the NLM_F_DUMP_INTR flag set. | |
2801 | */ | |
2802 | cb->prev_seq = 1; | |
2803 | *last_publ = 0; | |
2804 | return -EPIPE; | |
2805 | } | |
2806 | } else { | |
2807 | p = list_first_entry(&tsk->publications, struct publication, | |
2808 | pport_list); | |
2809 | } | |
2810 | ||
2811 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2812 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2813 | if (err) { | |
2814 | *last_publ = p->key; | |
2815 | return err; | |
2816 | } | |
2817 | } | |
2818 | *last_publ = 0; | |
2819 | ||
2820 | return 0; | |
2821 | } | |
2822 | ||
2823 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2824 | { | |
2825 | int err; | |
07f6c4bc | 2826 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2827 | u32 last_publ = cb->args[1]; |
2828 | u32 done = cb->args[2]; | |
2829 | struct tipc_sock *tsk; | |
2830 | ||
07f6c4bc | 2831 | if (!tsk_portid) { |
1a1a143d RA |
2832 | struct nlattr **attrs; |
2833 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2834 | ||
2835 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2836 | if (err) | |
2837 | return err; | |
2838 | ||
2839 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, | |
2840 | attrs[TIPC_NLA_SOCK], | |
2841 | tipc_nl_sock_policy); | |
2842 | if (err) | |
2843 | return err; | |
2844 | ||
2845 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2846 | return -EINVAL; | |
2847 | ||
07f6c4bc | 2848 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2849 | } |
2850 | ||
2851 | if (done) | |
2852 | return 0; | |
2853 | ||
07f6c4bc | 2854 | tsk = tipc_sk_lookup(tsk_portid); |
1a1a143d RA |
2855 | if (!tsk) |
2856 | return -EINVAL; | |
2857 | ||
2858 | lock_sock(&tsk->sk); | |
2859 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2860 | if (!err) | |
2861 | done = 1; | |
2862 | release_sock(&tsk->sk); | |
07f6c4bc | 2863 | sock_put(&tsk->sk); |
1a1a143d | 2864 | |
07f6c4bc | 2865 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2866 | cb->args[1] = last_publ; |
2867 | cb->args[2] = done; | |
2868 | ||
2869 | return skb->len; | |
2870 | } |