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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
75da2163 | 4 | * Copyright (c) 2001-2007, 2012-2017, 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 | 37 | #include <linux/rhashtable.h> |
174cd4b1 IM |
38 | #include <linux/sched/signal.h> |
39 | ||
b97bf3fd | 40 | #include "core.h" |
e2dafe87 | 41 | #include "name_table.h" |
78acb1f9 | 42 | #include "node.h" |
e2dafe87 | 43 | #include "link.h" |
c637c103 | 44 | #include "name_distr.h" |
2e84c60b | 45 | #include "socket.h" |
a6bf70f7 | 46 | #include "bcast.h" |
49cc66ea | 47 | #include "netlink.h" |
75da2163 | 48 | #include "group.h" |
2cf8aa19 | 49 | |
07f6c4bc | 50 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
0d5fcebf | 51 | #define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc | 52 | #define TIPC_FWD_MSG 1 |
07f6c4bc YX |
53 | #define TIPC_MAX_PORT 0xffffffff |
54 | #define TIPC_MIN_PORT 1 | |
e9f8b101 | 55 | #define TIPC_ACK_RATE 4 /* ACK at 1/4 of of rcv window size */ |
301bae56 | 56 | |
0c288c86 PB |
57 | enum { |
58 | TIPC_LISTEN = TCP_LISTEN, | |
8ea642ee | 59 | TIPC_ESTABLISHED = TCP_ESTABLISHED, |
438adcaf | 60 | TIPC_OPEN = TCP_CLOSE, |
9fd4b070 | 61 | TIPC_DISCONNECTING = TCP_CLOSE_WAIT, |
99a20889 | 62 | TIPC_CONNECTING = TCP_SYN_SENT, |
0c288c86 PB |
63 | }; |
64 | ||
31c82a2d JM |
65 | struct sockaddr_pair { |
66 | struct sockaddr_tipc sock; | |
67 | struct sockaddr_tipc member; | |
68 | }; | |
69 | ||
301bae56 JPM |
70 | /** |
71 | * struct tipc_sock - TIPC socket structure | |
72 | * @sk: socket - interacts with 'port' and with user via the socket API | |
301bae56 JPM |
73 | * @conn_type: TIPC type used when connection was established |
74 | * @conn_instance: TIPC instance used when connection was established | |
75 | * @published: non-zero if port has one or more associated names | |
76 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 77 | * @portid: unique port identity in TIPC socket hash table |
301bae56 | 78 | * @phdr: preformatted message header used when sending messages |
365ad353 | 79 | * #cong_links: list of congested links |
301bae56 | 80 | * @publications: list of publications for port |
365ad353 | 81 | * @blocking_link: address of the congested link we are currently sleeping on |
301bae56 JPM |
82 | * @pub_count: total # of publications port has made during its lifetime |
83 | * @probing_state: | |
301bae56 JPM |
84 | * @conn_timeout: the time we can wait for an unresponded setup request |
85 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
365ad353 | 86 | * @cong_link_cnt: number of congested links |
75da2163 | 87 | * @snt_unacked: # messages sent by socket, and not yet acked by peer |
301bae56 | 88 | * @rcv_unacked: # messages read by user, but not yet acked back to peer |
aeda16b6 | 89 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc | 90 | * @node: hash table node |
01fd12bb | 91 | * @mc_method: cookie for use between socket and broadcast layer |
07f6c4bc | 92 | * @rcu: rcu struct for tipc_sock |
301bae56 JPM |
93 | */ |
94 | struct tipc_sock { | |
95 | struct sock sk; | |
301bae56 JPM |
96 | u32 conn_type; |
97 | u32 conn_instance; | |
98 | int published; | |
99 | u32 max_pkt; | |
07f6c4bc | 100 | u32 portid; |
301bae56 | 101 | struct tipc_msg phdr; |
365ad353 | 102 | struct list_head cong_links; |
301bae56 JPM |
103 | struct list_head publications; |
104 | u32 pub_count; | |
301bae56 JPM |
105 | uint conn_timeout; |
106 | atomic_t dupl_rcvcnt; | |
8ea642ee | 107 | bool probe_unacked; |
365ad353 | 108 | u16 cong_link_cnt; |
10724cc7 JPM |
109 | u16 snt_unacked; |
110 | u16 snd_win; | |
60020e18 | 111 | u16 peer_caps; |
10724cc7 JPM |
112 | u16 rcv_unacked; |
113 | u16 rcv_win; | |
aeda16b6 | 114 | struct sockaddr_tipc peer; |
07f6c4bc | 115 | struct rhash_head node; |
01fd12bb | 116 | struct tipc_mc_method mc_method; |
07f6c4bc | 117 | struct rcu_head rcu; |
75da2163 | 118 | struct tipc_group *group; |
60c25306 | 119 | bool group_is_open; |
301bae56 | 120 | }; |
b97bf3fd | 121 | |
64ac5f59 | 122 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 123 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 124 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 125 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c | 126 | static int tipc_release(struct socket *sock); |
cdfbabfb DH |
127 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
128 | bool kern); | |
31b102bb | 129 | static void tipc_sk_timeout(struct timer_list *t); |
301bae56 | 130 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 131 | struct tipc_name_seq const *seq); |
301bae56 | 132 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 133 | struct tipc_name_seq const *seq); |
75da2163 | 134 | static int tipc_sk_leave(struct tipc_sock *tsk); |
e05b31f4 | 135 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
136 | static int tipc_sk_insert(struct tipc_sock *tsk); |
137 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
365ad353 | 138 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz); |
39a0295f | 139 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); |
b97bf3fd | 140 | |
bca65eae FW |
141 | static const struct proto_ops packet_ops; |
142 | static const struct proto_ops stream_ops; | |
143 | static const struct proto_ops msg_ops; | |
b97bf3fd | 144 | static struct proto tipc_proto; |
6cca7289 HX |
145 | static const struct rhashtable_params tsk_rht_params; |
146 | ||
c5898636 JPM |
147 | static u32 tsk_own_node(struct tipc_sock *tsk) |
148 | { | |
149 | return msg_prevnode(&tsk->phdr); | |
150 | } | |
151 | ||
301bae56 | 152 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 153 | { |
301bae56 | 154 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
155 | } |
156 | ||
301bae56 | 157 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 158 | { |
301bae56 | 159 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
160 | } |
161 | ||
301bae56 | 162 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 163 | { |
301bae56 | 164 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
165 | } |
166 | ||
301bae56 | 167 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 168 | { |
301bae56 | 169 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
170 | } |
171 | ||
301bae56 | 172 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 173 | { |
301bae56 | 174 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
175 | } |
176 | ||
301bae56 | 177 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 178 | { |
301bae56 | 179 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
180 | } |
181 | ||
301bae56 | 182 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 183 | { |
301bae56 | 184 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
185 | } |
186 | ||
301bae56 | 187 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
188 | { |
189 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
190 | return -EINVAL; | |
301bae56 | 191 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
192 | return 0; |
193 | } | |
8826cde6 | 194 | |
301bae56 JPM |
195 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
196 | { | |
197 | return container_of(sk, struct tipc_sock, sk); | |
198 | } | |
199 | ||
10724cc7 | 200 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 201 | { |
6998cc6e | 202 | return tsk->snt_unacked > tsk->snd_win; |
10724cc7 JPM |
203 | } |
204 | ||
b7d42635 JM |
205 | static u16 tsk_blocks(int len) |
206 | { | |
207 | return ((len / FLOWCTL_BLK_SZ) + 1); | |
208 | } | |
209 | ||
10724cc7 JPM |
210 | /* tsk_blocks(): translate a buffer size in bytes to number of |
211 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
212 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
213 | */ | |
214 | static u16 tsk_adv_blocks(int len) | |
215 | { | |
216 | return len / FLOWCTL_BLK_SZ / 4; | |
217 | } | |
218 | ||
219 | /* tsk_inc(): increment counter for sent or received data | |
220 | * - If block based flow control is not supported by peer we | |
221 | * fall back to message based ditto, incrementing the counter | |
222 | */ | |
223 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
224 | { | |
225 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
226 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
227 | return 1; | |
301bae56 JPM |
228 | } |
229 | ||
0c3141e9 | 230 | /** |
2e84c60b | 231 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
232 | * |
233 | * Caller must hold socket lock | |
b97bf3fd | 234 | */ |
2e84c60b | 235 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 236 | { |
5f6d9123 | 237 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
238 | } |
239 | ||
bcd3ffd4 JPM |
240 | /* tipc_sk_respond() : send response message back to sender |
241 | */ | |
242 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
243 | { | |
244 | u32 selector; | |
245 | u32 dnode; | |
246 | u32 onode = tipc_own_addr(sock_net(sk)); | |
247 | ||
248 | if (!tipc_msg_reverse(onode, &skb, err)) | |
249 | return; | |
250 | ||
251 | dnode = msg_destnode(buf_msg(skb)); | |
252 | selector = msg_origport(buf_msg(skb)); | |
253 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
254 | } | |
255 | ||
b97bf3fd | 256 | /** |
2e84c60b | 257 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
258 | * |
259 | * Caller must hold socket lock | |
b97bf3fd | 260 | */ |
2e84c60b | 261 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 262 | { |
a6ca1094 | 263 | struct sk_buff *skb; |
0c3141e9 | 264 | |
bcd3ffd4 JPM |
265 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
266 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
267 | } |
268 | ||
d6fb7e9c PB |
269 | static bool tipc_sk_connected(struct sock *sk) |
270 | { | |
f40acbaf | 271 | return sk->sk_state == TIPC_ESTABLISHED; |
d6fb7e9c PB |
272 | } |
273 | ||
c752023a PB |
274 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
275 | * @sk: socket | |
276 | * | |
277 | * Returns true if connection less, false otherwise | |
278 | */ | |
279 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
280 | { | |
281 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
282 | } | |
283 | ||
2e84c60b | 284 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
285 | * |
286 | * Handles cases where the node's network address has changed from | |
287 | * the default of <0.0.0> to its configured setting. | |
288 | */ | |
2e84c60b | 289 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 290 | { |
d6fb7e9c PB |
291 | struct sock *sk = &tsk->sk; |
292 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); | |
301bae56 | 293 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
294 | u32 orig_node; |
295 | u32 peer_node; | |
296 | ||
d6fb7e9c | 297 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
298 | return false; |
299 | ||
300 | if (unlikely(msg_origport(msg) != peer_port)) | |
301 | return false; | |
302 | ||
303 | orig_node = msg_orignode(msg); | |
301bae56 | 304 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
305 | |
306 | if (likely(orig_node == peer_node)) | |
307 | return true; | |
308 | ||
34747539 | 309 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
310 | return true; |
311 | ||
34747539 | 312 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
313 | return true; |
314 | ||
315 | return false; | |
316 | } | |
317 | ||
0c288c86 PB |
318 | /* tipc_set_sk_state - set the sk_state of the socket |
319 | * @sk: socket | |
320 | * | |
321 | * Caller must hold socket lock | |
322 | * | |
323 | * Returns 0 on success, errno otherwise | |
324 | */ | |
325 | static int tipc_set_sk_state(struct sock *sk, int state) | |
326 | { | |
438adcaf | 327 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
328 | int res = -EINVAL; |
329 | ||
330 | switch (state) { | |
438adcaf PB |
331 | case TIPC_OPEN: |
332 | res = 0; | |
333 | break; | |
0c288c86 | 334 | case TIPC_LISTEN: |
99a20889 | 335 | case TIPC_CONNECTING: |
438adcaf | 336 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
337 | res = 0; |
338 | break; | |
8ea642ee | 339 | case TIPC_ESTABLISHED: |
99a20889 | 340 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 341 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
342 | res = 0; |
343 | break; | |
9fd4b070 | 344 | case TIPC_DISCONNECTING: |
99a20889 | 345 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
346 | oldsk_state == TIPC_ESTABLISHED) |
347 | res = 0; | |
348 | break; | |
0c288c86 PB |
349 | } |
350 | ||
351 | if (!res) | |
352 | sk->sk_state = state; | |
353 | ||
354 | return res; | |
355 | } | |
356 | ||
8c44e1af JPM |
357 | static int tipc_sk_sock_err(struct socket *sock, long *timeout) |
358 | { | |
359 | struct sock *sk = sock->sk; | |
360 | int err = sock_error(sk); | |
361 | int typ = sock->type; | |
362 | ||
363 | if (err) | |
364 | return err; | |
365 | if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { | |
366 | if (sk->sk_state == TIPC_DISCONNECTING) | |
367 | return -EPIPE; | |
368 | else if (!tipc_sk_connected(sk)) | |
369 | return -ENOTCONN; | |
370 | } | |
371 | if (!*timeout) | |
372 | return -EAGAIN; | |
373 | if (signal_pending(current)) | |
374 | return sock_intr_errno(*timeout); | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
844cf763 JPM |
379 | #define tipc_wait_for_cond(sock_, timeo_, condition_) \ |
380 | ({ \ | |
381 | struct sock *sk_; \ | |
382 | int rc_; \ | |
383 | \ | |
384 | while ((rc_ = !(condition_))) { \ | |
385 | DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ | |
386 | sk_ = (sock_)->sk; \ | |
387 | rc_ = tipc_sk_sock_err((sock_), timeo_); \ | |
388 | if (rc_) \ | |
389 | break; \ | |
390 | prepare_to_wait(sk_sleep(sk_), &wait_, TASK_INTERRUPTIBLE); \ | |
391 | release_sock(sk_); \ | |
392 | *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \ | |
393 | sched_annotate_sleep(); \ | |
394 | lock_sock(sk_); \ | |
395 | remove_wait_queue(sk_sleep(sk_), &wait_); \ | |
396 | } \ | |
397 | rc_; \ | |
8c44e1af JPM |
398 | }) |
399 | ||
b97bf3fd | 400 | /** |
c5fa7b3c | 401 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 402 | * @net: network namespace (must be default network) |
b97bf3fd PL |
403 | * @sock: pre-allocated socket structure |
404 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 405 | * @kern: caused by kernel or by userspace? |
c4307285 | 406 | * |
0c3141e9 AS |
407 | * This routine creates additional data structures used by the TIPC socket, |
408 | * initializes them, and links them together. | |
b97bf3fd PL |
409 | * |
410 | * Returns 0 on success, errno otherwise | |
411 | */ | |
58ed9442 JPM |
412 | static int tipc_sk_create(struct net *net, struct socket *sock, |
413 | int protocol, int kern) | |
b97bf3fd | 414 | { |
c5898636 | 415 | struct tipc_net *tn; |
0c3141e9 | 416 | const struct proto_ops *ops; |
b97bf3fd | 417 | struct sock *sk; |
58ed9442 | 418 | struct tipc_sock *tsk; |
5b8fa7ce | 419 | struct tipc_msg *msg; |
0c3141e9 AS |
420 | |
421 | /* Validate arguments */ | |
b97bf3fd PL |
422 | if (unlikely(protocol != 0)) |
423 | return -EPROTONOSUPPORT; | |
424 | ||
b97bf3fd PL |
425 | switch (sock->type) { |
426 | case SOCK_STREAM: | |
0c3141e9 | 427 | ops = &stream_ops; |
b97bf3fd PL |
428 | break; |
429 | case SOCK_SEQPACKET: | |
0c3141e9 | 430 | ops = &packet_ops; |
b97bf3fd PL |
431 | break; |
432 | case SOCK_DGRAM: | |
b97bf3fd | 433 | case SOCK_RDM: |
0c3141e9 | 434 | ops = &msg_ops; |
b97bf3fd | 435 | break; |
49978651 | 436 | default: |
49978651 | 437 | return -EPROTOTYPE; |
b97bf3fd PL |
438 | } |
439 | ||
0c3141e9 | 440 | /* Allocate socket's protocol area */ |
11aa9c28 | 441 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 442 | if (sk == NULL) |
b97bf3fd | 443 | return -ENOMEM; |
b97bf3fd | 444 | |
58ed9442 | 445 | tsk = tipc_sk(sk); |
301bae56 | 446 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 | 447 | INIT_LIST_HEAD(&tsk->publications); |
365ad353 | 448 | INIT_LIST_HEAD(&tsk->cong_links); |
301bae56 | 449 | msg = &tsk->phdr; |
c5898636 | 450 | tn = net_generic(sock_net(sk), tipc_net_id); |
b97bf3fd | 451 | |
0c3141e9 | 452 | /* Finish initializing socket data structures */ |
0c3141e9 | 453 | sock->ops = ops; |
0c3141e9 | 454 | sock_init_data(sock, sk); |
438adcaf | 455 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 456 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 457 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
458 | return -EINVAL; |
459 | } | |
40f9f439 HX |
460 | |
461 | /* Ensure tsk is visible before we read own_addr. */ | |
462 | smp_mb(); | |
463 | ||
464 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
465 | NAMED_H_SIZE, 0); | |
466 | ||
07f6c4bc | 467 | msg_set_origport(msg, tsk->portid); |
31b102bb | 468 | timer_setup(&sk->sk_timer, tipc_sk_timeout, 0); |
6f00089c | 469 | sk->sk_shutdown = 0; |
64ac5f59 | 470 | sk->sk_backlog_rcv = tipc_sk_backlog_rcv; |
cc79dd1b | 471 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
472 | sk->sk_data_ready = tipc_data_ready; |
473 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 474 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc | 475 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
1b22bcad | 476 | tsk->group_is_open = true; |
4f4482dc | 477 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 478 | |
10724cc7 JPM |
479 | /* Start out with safe limits until we receive an advertised window */ |
480 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
481 | tsk->rcv_win = tsk->snd_win; | |
482 | ||
c752023a | 483 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 484 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 485 | if (sock->type == SOCK_DGRAM) |
301bae56 | 486 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 487 | } |
438adcaf | 488 | |
b97bf3fd PL |
489 | return 0; |
490 | } | |
491 | ||
07f6c4bc YX |
492 | static void tipc_sk_callback(struct rcu_head *head) |
493 | { | |
494 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
495 | ||
496 | sock_put(&tsk->sk); | |
497 | } | |
498 | ||
6f00089c PB |
499 | /* Caller should hold socket lock for the socket. */ |
500 | static void __tipc_shutdown(struct socket *sock, int error) | |
501 | { | |
502 | struct sock *sk = sock->sk; | |
503 | struct tipc_sock *tsk = tipc_sk(sk); | |
504 | struct net *net = sock_net(sk); | |
365ad353 | 505 | long timeout = CONN_TIMEOUT_DEFAULT; |
6f00089c PB |
506 | u32 dnode = tsk_peer_node(tsk); |
507 | struct sk_buff *skb; | |
508 | ||
365ad353 JPM |
509 | /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */ |
510 | tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && | |
511 | !tsk_conn_cong(tsk))); | |
512 | ||
6f00089c PB |
513 | /* Reject all unreceived messages, except on an active connection |
514 | * (which disconnects locally & sends a 'FIN+' to peer). | |
515 | */ | |
516 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
517 | if (TIPC_SKB_CB(skb)->bytes_read) { | |
518 | kfree_skb(skb); | |
693c5649 | 519 | continue; |
6f00089c | 520 | } |
693c5649 JPM |
521 | if (!tipc_sk_type_connectionless(sk) && |
522 | sk->sk_state != TIPC_DISCONNECTING) { | |
523 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
524 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
525 | } | |
526 | tipc_sk_respond(sk, skb, error); | |
6f00089c | 527 | } |
693c5649 JPM |
528 | |
529 | if (tipc_sk_type_connectionless(sk)) | |
530 | return; | |
531 | ||
6f00089c PB |
532 | if (sk->sk_state != TIPC_DISCONNECTING) { |
533 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
534 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
535 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
536 | tsk->portid, error); | |
537 | if (skb) | |
538 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
693c5649 JPM |
539 | tipc_node_remove_conn(net, dnode, tsk->portid); |
540 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
6f00089c PB |
541 | } |
542 | } | |
543 | ||
b97bf3fd | 544 | /** |
247f0f3c | 545 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
546 | * @sock: socket to destroy |
547 | * | |
548 | * This routine cleans up any messages that are still queued on the socket. | |
549 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
550 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
551 | * and any others are discarded. (If the first message on a STREAM socket | |
552 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 553 | * |
b97bf3fd PL |
554 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
555 | * are returned or discarded according to the "destination droppable" setting | |
556 | * specified for the message by the sender. | |
557 | * | |
558 | * Returns 0 on success, errno otherwise | |
559 | */ | |
247f0f3c | 560 | static int tipc_release(struct socket *sock) |
b97bf3fd | 561 | { |
b97bf3fd | 562 | struct sock *sk = sock->sk; |
58ed9442 | 563 | struct tipc_sock *tsk; |
b97bf3fd | 564 | |
0c3141e9 AS |
565 | /* |
566 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
567 | * releases a pre-allocated child socket that was never used) | |
568 | */ | |
0c3141e9 | 569 | if (sk == NULL) |
b97bf3fd | 570 | return 0; |
c4307285 | 571 | |
58ed9442 | 572 | tsk = tipc_sk(sk); |
0c3141e9 AS |
573 | lock_sock(sk); |
574 | ||
6f00089c PB |
575 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
576 | sk->sk_shutdown = SHUTDOWN_MASK; | |
75da2163 | 577 | tipc_sk_leave(tsk); |
301bae56 | 578 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 579 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 580 | tipc_sk_remove(tsk); |
b97bf3fd | 581 | |
0c3141e9 | 582 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 583 | release_sock(sk); |
a80ae530 | 584 | tipc_dest_list_purge(&tsk->cong_links); |
365ad353 | 585 | tsk->cong_link_cnt = 0; |
07f6c4bc | 586 | call_rcu(&tsk->rcu, tipc_sk_callback); |
0c3141e9 | 587 | sock->sk = NULL; |
b97bf3fd | 588 | |
065d7e39 | 589 | return 0; |
b97bf3fd PL |
590 | } |
591 | ||
592 | /** | |
247f0f3c | 593 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
594 | * @sock: socket structure |
595 | * @uaddr: socket address describing name(s) and desired operation | |
596 | * @uaddr_len: size of socket address data structure | |
c4307285 | 597 | * |
b97bf3fd PL |
598 | * Name and name sequence binding is indicated using a positive scope value; |
599 | * a negative scope value unbinds the specified name. Specifying no name | |
600 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 601 | * |
b97bf3fd | 602 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
603 | * |
604 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
605 | * access any non-constant socket information. | |
b97bf3fd | 606 | */ |
247f0f3c YX |
607 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
608 | int uaddr_len) | |
b97bf3fd | 609 | { |
84602761 | 610 | struct sock *sk = sock->sk; |
b97bf3fd | 611 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 612 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 613 | int res = -EINVAL; |
b97bf3fd | 614 | |
84602761 YX |
615 | lock_sock(sk); |
616 | if (unlikely(!uaddr_len)) { | |
301bae56 | 617 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
618 | goto exit; |
619 | } | |
75da2163 JM |
620 | if (tsk->group) { |
621 | res = -EACCES; | |
622 | goto exit; | |
623 | } | |
84602761 YX |
624 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
625 | res = -EINVAL; | |
626 | goto exit; | |
627 | } | |
628 | if (addr->family != AF_TIPC) { | |
629 | res = -EAFNOSUPPORT; | |
630 | goto exit; | |
631 | } | |
b97bf3fd | 632 | |
b97bf3fd PL |
633 | if (addr->addrtype == TIPC_ADDR_NAME) |
634 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
635 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
636 | res = -EAFNOSUPPORT; | |
637 | goto exit; | |
638 | } | |
c4307285 | 639 | |
13a2e898 | 640 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 641 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
642 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
643 | res = -EACCES; | |
644 | goto exit; | |
645 | } | |
c422f1bd | 646 | |
928df188 | 647 | res = (addr->scope >= 0) ? |
301bae56 JPM |
648 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
649 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
650 | exit: |
651 | release_sock(sk); | |
652 | return res; | |
b97bf3fd PL |
653 | } |
654 | ||
c4307285 | 655 | /** |
247f0f3c | 656 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
657 | * @sock: socket structure |
658 | * @uaddr: area for returned socket address | |
659 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 660 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 661 | * |
b97bf3fd | 662 | * Returns 0 on success, errno otherwise |
0c3141e9 | 663 | * |
2da59918 AS |
664 | * NOTE: This routine doesn't need to take the socket lock since it only |
665 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 666 | * a completely predictable manner). |
b97bf3fd | 667 | */ |
247f0f3c | 668 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
9b2c45d4 | 669 | int peer) |
b97bf3fd | 670 | { |
b97bf3fd | 671 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
672 | struct sock *sk = sock->sk; |
673 | struct tipc_sock *tsk = tipc_sk(sk); | |
34747539 | 674 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 675 | |
88f8a5e3 | 676 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 677 | if (peer) { |
f40acbaf | 678 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 679 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 680 | return -ENOTCONN; |
301bae56 JPM |
681 | addr->addr.id.ref = tsk_peer_port(tsk); |
682 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 683 | } else { |
07f6c4bc | 684 | addr->addr.id.ref = tsk->portid; |
34747539 | 685 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 686 | } |
b97bf3fd | 687 | |
b97bf3fd PL |
688 | addr->addrtype = TIPC_ADDR_ID; |
689 | addr->family = AF_TIPC; | |
690 | addr->scope = 0; | |
b97bf3fd PL |
691 | addr->addr.name.domain = 0; |
692 | ||
9b2c45d4 | 693 | return sizeof(*addr); |
b97bf3fd PL |
694 | } |
695 | ||
696 | /** | |
247f0f3c | 697 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
698 | * @file: file structure associated with the socket |
699 | * @sock: socket for which to calculate the poll bits | |
700 | * @wait: ??? | |
701 | * | |
9b674e82 AS |
702 | * Returns pollmask value |
703 | * | |
704 | * COMMENTARY: | |
705 | * It appears that the usual socket locking mechanisms are not useful here | |
706 | * since the pollmask info is potentially out-of-date the moment this routine | |
707 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
708 | * to handle any preventable race conditions, so TIPC will do the same ... | |
709 | * | |
f662c070 AS |
710 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
711 | * imply that the operation will succeed, merely that it should be performed | |
712 | * and will not block. | |
b97bf3fd | 713 | */ |
ade994f4 | 714 | static __poll_t tipc_poll(struct file *file, struct socket *sock, |
247f0f3c | 715 | poll_table *wait) |
b97bf3fd | 716 | { |
9b674e82 | 717 | struct sock *sk = sock->sk; |
58ed9442 | 718 | struct tipc_sock *tsk = tipc_sk(sk); |
ade994f4 | 719 | __poll_t revents = 0; |
9b674e82 | 720 | |
f288bef4 | 721 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 722 | |
6f00089c | 723 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
a9a08845 | 724 | revents |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM; |
6f00089c | 725 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
a9a08845 | 726 | revents |= EPOLLHUP; |
6f00089c | 727 | |
f40acbaf PB |
728 | switch (sk->sk_state) { |
729 | case TIPC_ESTABLISHED: | |
517d7c79 | 730 | case TIPC_CONNECTING: |
365ad353 | 731 | if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk)) |
a9a08845 | 732 | revents |= EPOLLOUT; |
f40acbaf PB |
733 | /* fall thru' */ |
734 | case TIPC_LISTEN: | |
cb4dc41e | 735 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
a9a08845 | 736 | revents |= EPOLLIN | EPOLLRDNORM; |
f40acbaf PB |
737 | break; |
738 | case TIPC_OPEN: | |
60c25306 | 739 | if (tsk->group_is_open && !tsk->cong_link_cnt) |
a9a08845 | 740 | revents |= EPOLLOUT; |
ae236fb2 JM |
741 | if (!tipc_sk_type_connectionless(sk)) |
742 | break; | |
cb4dc41e | 743 | if (skb_queue_empty(&sk->sk_receive_queue)) |
ae236fb2 | 744 | break; |
a9a08845 | 745 | revents |= EPOLLIN | EPOLLRDNORM; |
f40acbaf PB |
746 | break; |
747 | case TIPC_DISCONNECTING: | |
a9a08845 | 748 | revents = EPOLLIN | EPOLLRDNORM | EPOLLHUP; |
f40acbaf | 749 | break; |
f662c070 | 750 | } |
ae236fb2 | 751 | return revents; |
b97bf3fd PL |
752 | } |
753 | ||
0abd8ff2 JPM |
754 | /** |
755 | * tipc_sendmcast - send multicast message | |
756 | * @sock: socket structure | |
757 | * @seq: destination address | |
562640f3 | 758 | * @msg: message to send |
365ad353 JPM |
759 | * @dlen: length of data to send |
760 | * @timeout: timeout to wait for wakeup | |
0abd8ff2 JPM |
761 | * |
762 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
763 | * Returns the number of bytes sent on success, or errno | |
764 | */ | |
765 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
365ad353 | 766 | struct msghdr *msg, size_t dlen, long timeout) |
0abd8ff2 JPM |
767 | { |
768 | struct sock *sk = sock->sk; | |
c5898636 | 769 | struct tipc_sock *tsk = tipc_sk(sk); |
365ad353 | 770 | struct tipc_msg *hdr = &tsk->phdr; |
f2f9800d | 771 | struct net *net = sock_net(sk); |
365ad353 | 772 | int mtu = tipc_bcast_get_mtu(net); |
01fd12bb | 773 | struct tipc_mc_method *method = &tsk->mc_method; |
365ad353 | 774 | struct sk_buff_head pkts; |
a853e4c6 | 775 | struct tipc_nlist dsts; |
0abd8ff2 JPM |
776 | int rc; |
777 | ||
75da2163 JM |
778 | if (tsk->group) |
779 | return -EACCES; | |
780 | ||
a853e4c6 | 781 | /* Block or return if any destination link is congested */ |
365ad353 JPM |
782 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); |
783 | if (unlikely(rc)) | |
784 | return rc; | |
f214fc40 | 785 | |
a853e4c6 JPM |
786 | /* Lookup destination nodes */ |
787 | tipc_nlist_init(&dsts, tipc_own_addr(net)); | |
788 | tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower, | |
e9a03445 | 789 | seq->upper, &dsts); |
a853e4c6 JPM |
790 | if (!dsts.local && !dsts.remote) |
791 | return -EHOSTUNREACH; | |
792 | ||
793 | /* Build message header */ | |
365ad353 | 794 | msg_set_type(hdr, TIPC_MCAST_MSG); |
a853e4c6 | 795 | msg_set_hdr_sz(hdr, MCAST_H_SIZE); |
365ad353 JPM |
796 | msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); |
797 | msg_set_destport(hdr, 0); | |
798 | msg_set_destnode(hdr, 0); | |
799 | msg_set_nametype(hdr, seq->type); | |
800 | msg_set_namelower(hdr, seq->lower); | |
801 | msg_set_nameupper(hdr, seq->upper); | |
365ad353 | 802 | |
a853e4c6 | 803 | /* Build message as chain of buffers */ |
365ad353 JPM |
804 | skb_queue_head_init(&pkts); |
805 | rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); | |
0abd8ff2 | 806 | |
a853e4c6 JPM |
807 | /* Send message if build was successful */ |
808 | if (unlikely(rc == dlen)) | |
01fd12bb | 809 | rc = tipc_mcast_xmit(net, &pkts, method, &dsts, |
a853e4c6 JPM |
810 | &tsk->cong_link_cnt); |
811 | ||
812 | tipc_nlist_purge(&dsts); | |
365ad353 JPM |
813 | |
814 | return rc ? rc : dlen; | |
0abd8ff2 JPM |
815 | } |
816 | ||
27bd9ec0 JM |
817 | /** |
818 | * tipc_send_group_msg - send a message to a member in the group | |
819 | * @net: network namespace | |
820 | * @m: message to send | |
821 | * @mb: group member | |
822 | * @dnode: destination node | |
823 | * @dport: destination port | |
824 | * @dlen: total length of message data | |
825 | */ | |
826 | static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk, | |
827 | struct msghdr *m, struct tipc_member *mb, | |
828 | u32 dnode, u32 dport, int dlen) | |
829 | { | |
b87a5ea3 | 830 | u16 bc_snd_nxt = tipc_group_bc_snd_nxt(tsk->group); |
2f487712 | 831 | struct tipc_mc_method *method = &tsk->mc_method; |
27bd9ec0 JM |
832 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); |
833 | struct tipc_msg *hdr = &tsk->phdr; | |
834 | struct sk_buff_head pkts; | |
835 | int mtu, rc; | |
836 | ||
837 | /* Complete message header */ | |
838 | msg_set_type(hdr, TIPC_GRP_UCAST_MSG); | |
839 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); | |
840 | msg_set_destport(hdr, dport); | |
841 | msg_set_destnode(hdr, dnode); | |
b87a5ea3 | 842 | msg_set_grp_bc_seqno(hdr, bc_snd_nxt); |
27bd9ec0 JM |
843 | |
844 | /* Build message as chain of buffers */ | |
845 | skb_queue_head_init(&pkts); | |
846 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); | |
847 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); | |
848 | if (unlikely(rc != dlen)) | |
849 | return rc; | |
850 | ||
851 | /* Send message */ | |
852 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
853 | if (unlikely(rc == -ELINKCONG)) { | |
854 | tipc_dest_push(&tsk->cong_links, dnode, 0); | |
855 | tsk->cong_link_cnt++; | |
856 | } | |
857 | ||
2f487712 | 858 | /* Update send window */ |
27bd9ec0 JM |
859 | tipc_group_update_member(mb, blks); |
860 | ||
2f487712 JM |
861 | /* A broadcast sent within next EXPIRE period must follow same path */ |
862 | method->rcast = true; | |
863 | method->mandatory = true; | |
27bd9ec0 JM |
864 | return dlen; |
865 | } | |
866 | ||
867 | /** | |
868 | * tipc_send_group_unicast - send message to a member in the group | |
869 | * @sock: socket structure | |
870 | * @m: message to send | |
871 | * @dlen: total length of message data | |
872 | * @timeout: timeout to wait for wakeup | |
873 | * | |
874 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
875 | * Returns the number of bytes sent on success, or errno | |
876 | */ | |
877 | static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m, | |
878 | int dlen, long timeout) | |
879 | { | |
880 | struct sock *sk = sock->sk; | |
881 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
882 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
883 | struct tipc_sock *tsk = tipc_sk(sk); | |
884 | struct tipc_group *grp = tsk->group; | |
885 | struct net *net = sock_net(sk); | |
886 | struct tipc_member *mb = NULL; | |
887 | u32 node, port; | |
888 | int rc; | |
889 | ||
890 | node = dest->addr.id.node; | |
891 | port = dest->addr.id.ref; | |
892 | if (!port && !node) | |
893 | return -EHOSTUNREACH; | |
894 | ||
895 | /* Block or return if destination link or member is congested */ | |
896 | rc = tipc_wait_for_cond(sock, &timeout, | |
897 | !tipc_dest_find(&tsk->cong_links, node, 0) && | |
898 | !tipc_group_cong(grp, node, port, blks, &mb)); | |
899 | if (unlikely(rc)) | |
900 | return rc; | |
901 | ||
902 | if (unlikely(!mb)) | |
903 | return -EHOSTUNREACH; | |
904 | ||
905 | rc = tipc_send_group_msg(net, tsk, m, mb, node, port, dlen); | |
906 | ||
907 | return rc ? rc : dlen; | |
908 | } | |
909 | ||
ee106d7f JM |
910 | /** |
911 | * tipc_send_group_anycast - send message to any member with given identity | |
912 | * @sock: socket structure | |
913 | * @m: message to send | |
914 | * @dlen: total length of message data | |
915 | * @timeout: timeout to wait for wakeup | |
916 | * | |
917 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
918 | * Returns the number of bytes sent on success, or errno | |
919 | */ | |
920 | static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m, | |
921 | int dlen, long timeout) | |
922 | { | |
923 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
924 | struct sock *sk = sock->sk; | |
925 | struct tipc_sock *tsk = tipc_sk(sk); | |
926 | struct list_head *cong_links = &tsk->cong_links; | |
927 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
928 | struct tipc_group *grp = tsk->group; | |
232d07b7 | 929 | struct tipc_msg *hdr = &tsk->phdr; |
ee106d7f JM |
930 | struct tipc_member *first = NULL; |
931 | struct tipc_member *mbr = NULL; | |
932 | struct net *net = sock_net(sk); | |
933 | u32 node, port, exclude; | |
ee106d7f | 934 | struct list_head dsts; |
232d07b7 | 935 | u32 type, inst, scope; |
ee106d7f JM |
936 | int lookups = 0; |
937 | int dstcnt, rc; | |
938 | bool cong; | |
939 | ||
940 | INIT_LIST_HEAD(&dsts); | |
941 | ||
232d07b7 | 942 | type = msg_nametype(hdr); |
ee106d7f | 943 | inst = dest->addr.name.name.instance; |
232d07b7 | 944 | scope = msg_lookup_scope(hdr); |
ee106d7f JM |
945 | exclude = tipc_group_exclude(grp); |
946 | ||
947 | while (++lookups < 4) { | |
948 | first = NULL; | |
949 | ||
950 | /* Look for a non-congested destination member, if any */ | |
951 | while (1) { | |
232d07b7 | 952 | if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts, |
ee106d7f JM |
953 | &dstcnt, exclude, false)) |
954 | return -EHOSTUNREACH; | |
955 | tipc_dest_pop(&dsts, &node, &port); | |
956 | cong = tipc_group_cong(grp, node, port, blks, &mbr); | |
957 | if (!cong) | |
958 | break; | |
959 | if (mbr == first) | |
960 | break; | |
961 | if (!first) | |
962 | first = mbr; | |
963 | } | |
964 | ||
965 | /* Start over if destination was not in member list */ | |
966 | if (unlikely(!mbr)) | |
967 | continue; | |
968 | ||
969 | if (likely(!cong && !tipc_dest_find(cong_links, node, 0))) | |
970 | break; | |
971 | ||
972 | /* Block or return if destination link or member is congested */ | |
973 | rc = tipc_wait_for_cond(sock, &timeout, | |
974 | !tipc_dest_find(cong_links, node, 0) && | |
975 | !tipc_group_cong(grp, node, port, | |
976 | blks, &mbr)); | |
977 | if (unlikely(rc)) | |
978 | return rc; | |
979 | ||
980 | /* Send, unless destination disappeared while waiting */ | |
981 | if (likely(mbr)) | |
982 | break; | |
983 | } | |
984 | ||
985 | if (unlikely(lookups >= 4)) | |
986 | return -EHOSTUNREACH; | |
987 | ||
988 | rc = tipc_send_group_msg(net, tsk, m, mbr, node, port, dlen); | |
989 | ||
990 | return rc ? rc : dlen; | |
991 | } | |
992 | ||
75da2163 JM |
993 | /** |
994 | * tipc_send_group_bcast - send message to all members in communication group | |
995 | * @sk: socket structure | |
996 | * @m: message to send | |
997 | * @dlen: total length of message data | |
998 | * @timeout: timeout to wait for wakeup | |
999 | * | |
1000 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
1001 | * Returns the number of bytes sent on success, or errno | |
1002 | */ | |
1003 | static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m, | |
1004 | int dlen, long timeout) | |
1005 | { | |
5b8dddb6 | 1006 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
75da2163 JM |
1007 | struct sock *sk = sock->sk; |
1008 | struct net *net = sock_net(sk); | |
1009 | struct tipc_sock *tsk = tipc_sk(sk); | |
1010 | struct tipc_group *grp = tsk->group; | |
1011 | struct tipc_nlist *dsts = tipc_group_dests(grp); | |
1012 | struct tipc_mc_method *method = &tsk->mc_method; | |
2f487712 | 1013 | bool ack = method->mandatory && method->rcast; |
b7d42635 | 1014 | int blks = tsk_blocks(MCAST_H_SIZE + dlen); |
75da2163 JM |
1015 | struct tipc_msg *hdr = &tsk->phdr; |
1016 | int mtu = tipc_bcast_get_mtu(net); | |
1017 | struct sk_buff_head pkts; | |
1018 | int rc = -EHOSTUNREACH; | |
1019 | ||
1020 | if (!dsts->local && !dsts->remote) | |
1021 | return -EHOSTUNREACH; | |
1022 | ||
b7d42635 JM |
1023 | /* Block or return if any destination link or member is congested */ |
1024 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt && | |
1025 | !tipc_group_bc_cong(grp, blks)); | |
75da2163 JM |
1026 | if (unlikely(rc)) |
1027 | return rc; | |
1028 | ||
1029 | /* Complete message header */ | |
5b8dddb6 JM |
1030 | if (dest) { |
1031 | msg_set_type(hdr, TIPC_GRP_MCAST_MSG); | |
1032 | msg_set_nameinst(hdr, dest->addr.name.name.instance); | |
1033 | } else { | |
1034 | msg_set_type(hdr, TIPC_GRP_BCAST_MSG); | |
1035 | msg_set_nameinst(hdr, 0); | |
1036 | } | |
b7d42635 | 1037 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); |
75da2163 JM |
1038 | msg_set_destport(hdr, 0); |
1039 | msg_set_destnode(hdr, 0); | |
75da2163 JM |
1040 | msg_set_grp_bc_seqno(hdr, tipc_group_bc_snd_nxt(grp)); |
1041 | ||
2f487712 JM |
1042 | /* Avoid getting stuck with repeated forced replicasts */ |
1043 | msg_set_grp_bc_ack_req(hdr, ack); | |
1044 | ||
75da2163 JM |
1045 | /* Build message as chain of buffers */ |
1046 | skb_queue_head_init(&pkts); | |
1047 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); | |
1048 | if (unlikely(rc != dlen)) | |
1049 | return rc; | |
1050 | ||
1051 | /* Send message */ | |
2f487712 | 1052 | rc = tipc_mcast_xmit(net, &pkts, method, dsts, &tsk->cong_link_cnt); |
75da2163 JM |
1053 | if (unlikely(rc)) |
1054 | return rc; | |
1055 | ||
b7d42635 | 1056 | /* Update broadcast sequence number and send windows */ |
2f487712 JM |
1057 | tipc_group_update_bc_members(tsk->group, blks, ack); |
1058 | ||
1059 | /* Broadcast link is now free to choose method for next broadcast */ | |
1060 | method->mandatory = false; | |
1061 | method->expires = jiffies; | |
1062 | ||
75da2163 JM |
1063 | return dlen; |
1064 | } | |
1065 | ||
5b8dddb6 JM |
1066 | /** |
1067 | * tipc_send_group_mcast - send message to all members with given identity | |
1068 | * @sock: socket structure | |
1069 | * @m: message to send | |
1070 | * @dlen: total length of message data | |
1071 | * @timeout: timeout to wait for wakeup | |
1072 | * | |
1073 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
1074 | * Returns the number of bytes sent on success, or errno | |
1075 | */ | |
1076 | static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m, | |
1077 | int dlen, long timeout) | |
1078 | { | |
1079 | struct sock *sk = sock->sk; | |
1080 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
5b8dddb6 JM |
1081 | struct tipc_sock *tsk = tipc_sk(sk); |
1082 | struct tipc_group *grp = tsk->group; | |
232d07b7 | 1083 | struct tipc_msg *hdr = &tsk->phdr; |
5b8dddb6 | 1084 | struct net *net = sock_net(sk); |
232d07b7 | 1085 | u32 type, inst, scope, exclude; |
5b8dddb6 | 1086 | struct list_head dsts; |
232d07b7 | 1087 | u32 dstcnt; |
5b8dddb6 JM |
1088 | |
1089 | INIT_LIST_HEAD(&dsts); | |
1090 | ||
232d07b7 JM |
1091 | type = msg_nametype(hdr); |
1092 | inst = dest->addr.name.name.instance; | |
1093 | scope = msg_lookup_scope(hdr); | |
5b8dddb6 | 1094 | exclude = tipc_group_exclude(grp); |
232d07b7 JM |
1095 | |
1096 | if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts, | |
1097 | &dstcnt, exclude, true)) | |
5b8dddb6 JM |
1098 | return -EHOSTUNREACH; |
1099 | ||
1100 | if (dstcnt == 1) { | |
1101 | tipc_dest_pop(&dsts, &dest->addr.id.node, &dest->addr.id.ref); | |
1102 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
1103 | } | |
1104 | ||
1105 | tipc_dest_list_purge(&dsts); | |
1106 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
1107 | } | |
1108 | ||
cb1b7280 JPM |
1109 | /** |
1110 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
1111 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
1112 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
1113 | * | |
1114 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 1115 | */ |
cb1b7280 JPM |
1116 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
1117 | struct sk_buff_head *inputq) | |
078bec82 | 1118 | { |
75da2163 | 1119 | u32 self = tipc_own_addr(net); |
232d07b7 | 1120 | u32 type, lower, upper, scope; |
cb1b7280 | 1121 | struct sk_buff *skb, *_skb; |
75da2163 | 1122 | u32 portid, oport, onode; |
232d07b7 | 1123 | struct sk_buff_head tmpq; |
75da2163 | 1124 | struct list_head dports; |
232d07b7 JM |
1125 | struct tipc_msg *hdr; |
1126 | int user, mtyp, hlen; | |
1127 | bool exact; | |
3c724acd | 1128 | |
cb1b7280 | 1129 | __skb_queue_head_init(&tmpq); |
4d8642d8 | 1130 | INIT_LIST_HEAD(&dports); |
078bec82 | 1131 | |
cb1b7280 JPM |
1132 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
1133 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
232d07b7 JM |
1134 | hdr = buf_msg(skb); |
1135 | user = msg_user(hdr); | |
1136 | mtyp = msg_type(hdr); | |
1137 | hlen = skb_headroom(skb) + msg_hdr_sz(hdr); | |
1138 | oport = msg_origport(hdr); | |
1139 | onode = msg_orignode(hdr); | |
1140 | type = msg_nametype(hdr); | |
1141 | ||
2f487712 JM |
1142 | if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) { |
1143 | spin_lock_bh(&inputq->lock); | |
1144 | if (skb_peek(arrvq) == skb) { | |
1145 | __skb_dequeue(arrvq); | |
1146 | __skb_queue_tail(inputq, skb); | |
1147 | } | |
c545a945 | 1148 | kfree_skb(skb); |
2f487712 JM |
1149 | spin_unlock_bh(&inputq->lock); |
1150 | continue; | |
1151 | } | |
232d07b7 JM |
1152 | |
1153 | /* Group messages require exact scope match */ | |
1154 | if (msg_in_group(hdr)) { | |
1155 | lower = 0; | |
1156 | upper = ~0; | |
1157 | scope = msg_lookup_scope(hdr); | |
1158 | exact = true; | |
1159 | } else { | |
1160 | /* TIPC_NODE_SCOPE means "any scope" in this context */ | |
1161 | if (onode == self) | |
1162 | scope = TIPC_NODE_SCOPE; | |
1163 | else | |
1164 | scope = TIPC_CLUSTER_SCOPE; | |
1165 | exact = false; | |
1166 | lower = msg_namelower(hdr); | |
1167 | upper = msg_nameupper(hdr); | |
75da2163 | 1168 | } |
232d07b7 JM |
1169 | |
1170 | /* Create destination port list: */ | |
1171 | tipc_nametbl_mc_lookup(net, type, lower, upper, | |
1172 | scope, exact, &dports); | |
1173 | ||
1174 | /* Clone message per destination */ | |
a80ae530 | 1175 | while (tipc_dest_pop(&dports, NULL, &portid)) { |
232d07b7 | 1176 | _skb = __pskb_copy(skb, hlen, GFP_ATOMIC); |
cb1b7280 JPM |
1177 | if (_skb) { |
1178 | msg_set_destport(buf_msg(_skb), portid); | |
1179 | __skb_queue_tail(&tmpq, _skb); | |
1180 | continue; | |
1181 | } | |
1182 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 1183 | } |
cb1b7280 JPM |
1184 | /* Append to inputq if not already done by other thread */ |
1185 | spin_lock_bh(&inputq->lock); | |
1186 | if (skb_peek(arrvq) == skb) { | |
1187 | skb_queue_splice_tail_init(&tmpq, inputq); | |
1188 | kfree_skb(__skb_dequeue(arrvq)); | |
1189 | } | |
1190 | spin_unlock_bh(&inputq->lock); | |
1191 | __skb_queue_purge(&tmpq); | |
1192 | kfree_skb(skb); | |
078bec82 | 1193 | } |
cb1b7280 | 1194 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
1195 | } |
1196 | ||
ac0074ee | 1197 | /** |
64ac5f59 | 1198 | * tipc_sk_conn_proto_rcv - receive a connection mng protocol message |
ac0074ee | 1199 | * @tsk: receiving socket |
bcd3ffd4 | 1200 | * @skb: pointer to message buffer. |
ac0074ee | 1201 | */ |
64ac5f59 JM |
1202 | static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
1203 | struct sk_buff_head *xmitq) | |
ac0074ee | 1204 | { |
bcd3ffd4 | 1205 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
1206 | u32 onode = tsk_own_node(tsk); |
1207 | struct sock *sk = &tsk->sk; | |
bcd3ffd4 | 1208 | int mtyp = msg_type(hdr); |
10724cc7 | 1209 | bool conn_cong; |
bcd3ffd4 | 1210 | |
ac0074ee | 1211 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 1212 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
1213 | goto exit; |
1214 | ||
c1be7756 PB |
1215 | if (unlikely(msg_errcode(hdr))) { |
1216 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1217 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
1218 | tsk_peer_port(tsk)); | |
1219 | sk->sk_state_change(sk); | |
1220 | goto exit; | |
1221 | } | |
1222 | ||
8ea642ee | 1223 | tsk->probe_unacked = false; |
ac0074ee | 1224 | |
bcd3ffd4 JPM |
1225 | if (mtyp == CONN_PROBE) { |
1226 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
1227 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
1228 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
1229 | return; |
1230 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 1231 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
1232 | tsk->snt_unacked -= msg_conn_ack(hdr); |
1233 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
1234 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 1235 | if (conn_cong) |
bcd3ffd4 JPM |
1236 | sk->sk_write_space(sk); |
1237 | } else if (mtyp != CONN_PROBE_REPLY) { | |
1238 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 1239 | } |
ac0074ee | 1240 | exit: |
bcd3ffd4 | 1241 | kfree_skb(skb); |
ac0074ee JPM |
1242 | } |
1243 | ||
b97bf3fd | 1244 | /** |
247f0f3c | 1245 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
1246 | * @sock: socket structure |
1247 | * @m: message to send | |
e2dafe87 | 1248 | * @dsz: amount of user data to be sent |
c4307285 | 1249 | * |
b97bf3fd | 1250 | * Message must have an destination specified explicitly. |
c4307285 | 1251 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
1252 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
1253 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 1254 | * |
b97bf3fd PL |
1255 | * Returns the number of bytes sent on success, or errno otherwise |
1256 | */ | |
1b784140 | 1257 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 1258 | struct msghdr *m, size_t dsz) |
39a0295f YX |
1259 | { |
1260 | struct sock *sk = sock->sk; | |
1261 | int ret; | |
1262 | ||
1263 | lock_sock(sk); | |
1264 | ret = __tipc_sendmsg(sock, m, dsz); | |
1265 | release_sock(sk); | |
1266 | ||
1267 | return ret; | |
1268 | } | |
1269 | ||
365ad353 | 1270 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1271 | { |
0c3141e9 | 1272 | struct sock *sk = sock->sk; |
f2f9800d | 1273 | struct net *net = sock_net(sk); |
365ad353 JPM |
1274 | struct tipc_sock *tsk = tipc_sk(sk); |
1275 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
1276 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); | |
1277 | struct list_head *clinks = &tsk->cong_links; | |
1278 | bool syn = !tipc_sk_type_connectionless(sk); | |
75da2163 | 1279 | struct tipc_group *grp = tsk->group; |
365ad353 | 1280 | struct tipc_msg *hdr = &tsk->phdr; |
f2f8036e | 1281 | struct tipc_name_seq *seq; |
365ad353 | 1282 | struct sk_buff_head pkts; |
365ad353 | 1283 | u32 dnode, dport; |
928df188 | 1284 | u32 type, inst; |
365ad353 | 1285 | int mtu, rc; |
b97bf3fd | 1286 | |
365ad353 | 1287 | if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE)) |
c29c3f70 | 1288 | return -EMSGSIZE; |
365ad353 | 1289 | |
27bd9ec0 JM |
1290 | if (likely(dest)) { |
1291 | if (unlikely(m->msg_namelen < sizeof(*dest))) | |
1292 | return -EINVAL; | |
1293 | if (unlikely(dest->family != AF_TIPC)) | |
1294 | return -EINVAL; | |
1295 | } | |
1296 | ||
1297 | if (grp) { | |
1298 | if (!dest) | |
1299 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
ee106d7f JM |
1300 | if (dest->addrtype == TIPC_ADDR_NAME) |
1301 | return tipc_send_group_anycast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1302 | if (dest->addrtype == TIPC_ADDR_ID) |
1303 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
5b8dddb6 JM |
1304 | if (dest->addrtype == TIPC_ADDR_MCAST) |
1305 | return tipc_send_group_mcast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1306 | return -EINVAL; |
1307 | } | |
75da2163 | 1308 | |
f2f8036e | 1309 | if (unlikely(!dest)) { |
365ad353 JPM |
1310 | dest = &tsk->peer; |
1311 | if (!syn || dest->family != AF_TIPC) | |
f2f8036e | 1312 | return -EDESTADDRREQ; |
f2f8036e | 1313 | } |
365ad353 | 1314 | |
365ad353 | 1315 | if (unlikely(syn)) { |
0c288c86 | 1316 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 1317 | return -EPIPE; |
438adcaf | 1318 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
1319 | return -EISCONN; |
1320 | if (tsk->published) | |
1321 | return -EOPNOTSUPP; | |
3388007b | 1322 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
1323 | tsk->conn_type = dest->addr.name.name.type; |
1324 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 1325 | } |
b97bf3fd | 1326 | } |
e2dafe87 | 1327 | |
365ad353 JPM |
1328 | seq = &dest->addr.nameseq; |
1329 | if (dest->addrtype == TIPC_ADDR_MCAST) | |
1330 | return tipc_sendmcast(sock, seq, m, dlen, timeout); | |
e2dafe87 | 1331 | |
365ad353 JPM |
1332 | if (dest->addrtype == TIPC_ADDR_NAME) { |
1333 | type = dest->addr.name.name.type; | |
1334 | inst = dest->addr.name.name.instance; | |
928df188 | 1335 | dnode = dest->addr.name.domain; |
365ad353 JPM |
1336 | msg_set_type(hdr, TIPC_NAMED_MSG); |
1337 | msg_set_hdr_sz(hdr, NAMED_H_SIZE); | |
1338 | msg_set_nametype(hdr, type); | |
1339 | msg_set_nameinst(hdr, inst); | |
928df188 | 1340 | msg_set_lookup_scope(hdr, tipc_node2scope(dnode)); |
4ac1c8d0 | 1341 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
365ad353 JPM |
1342 | msg_set_destnode(hdr, dnode); |
1343 | msg_set_destport(hdr, dport); | |
39a0295f YX |
1344 | if (unlikely(!dport && !dnode)) |
1345 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
1346 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
1347 | dnode = dest->addr.id.node; | |
365ad353 JPM |
1348 | msg_set_type(hdr, TIPC_DIRECT_MSG); |
1349 | msg_set_lookup_scope(hdr, 0); | |
1350 | msg_set_destnode(hdr, dnode); | |
1351 | msg_set_destport(hdr, dest->addr.id.ref); | |
1352 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); | |
e2dafe87 JPM |
1353 | } |
1354 | ||
365ad353 | 1355 | /* Block or return if destination link is congested */ |
a80ae530 JM |
1356 | rc = tipc_wait_for_cond(sock, &timeout, |
1357 | !tipc_dest_find(clinks, dnode, 0)); | |
365ad353 JPM |
1358 | if (unlikely(rc)) |
1359 | return rc; | |
1360 | ||
1361 | skb_queue_head_init(&pkts); | |
f2f9800d | 1362 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
365ad353 JPM |
1363 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
1364 | if (unlikely(rc != dlen)) | |
39a0295f | 1365 | return rc; |
e2dafe87 | 1366 | |
365ad353 JPM |
1367 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); |
1368 | if (unlikely(rc == -ELINKCONG)) { | |
a80ae530 | 1369 | tipc_dest_push(clinks, dnode, 0); |
365ad353 JPM |
1370 | tsk->cong_link_cnt++; |
1371 | rc = 0; | |
1372 | } | |
e2dafe87 | 1373 | |
365ad353 JPM |
1374 | if (unlikely(syn && !rc)) |
1375 | tipc_set_sk_state(sk, TIPC_CONNECTING); | |
1376 | ||
1377 | return rc ? rc : dlen; | |
b97bf3fd PL |
1378 | } |
1379 | ||
c4307285 | 1380 | /** |
365ad353 | 1381 | * tipc_sendstream - send stream-oriented data |
b97bf3fd | 1382 | * @sock: socket structure |
4ccfe5e0 JPM |
1383 | * @m: data to send |
1384 | * @dsz: total length of data to be transmitted | |
c4307285 | 1385 | * |
4ccfe5e0 | 1386 | * Used for SOCK_STREAM data. |
c4307285 | 1387 | * |
4ccfe5e0 JPM |
1388 | * Returns the number of bytes sent on success (or partial success), |
1389 | * or errno if no data sent | |
b97bf3fd | 1390 | */ |
365ad353 | 1391 | static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1392 | { |
1393 | struct sock *sk = sock->sk; | |
1394 | int ret; | |
1395 | ||
1396 | lock_sock(sk); | |
365ad353 | 1397 | ret = __tipc_sendstream(sock, m, dsz); |
39a0295f YX |
1398 | release_sock(sk); |
1399 | ||
1400 | return ret; | |
1401 | } | |
1402 | ||
365ad353 | 1403 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1404 | { |
0c3141e9 | 1405 | struct sock *sk = sock->sk; |
342dfc30 | 1406 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
365ad353 JPM |
1407 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
1408 | struct tipc_sock *tsk = tipc_sk(sk); | |
1409 | struct tipc_msg *hdr = &tsk->phdr; | |
1410 | struct net *net = sock_net(sk); | |
1411 | struct sk_buff_head pkts; | |
1412 | u32 dnode = tsk_peer_node(tsk); | |
1413 | int send, sent = 0; | |
1414 | int rc = 0; | |
1d835874 | 1415 | |
365ad353 | 1416 | skb_queue_head_init(&pkts); |
7cf87fa2 | 1417 | |
365ad353 JPM |
1418 | if (unlikely(dlen > INT_MAX)) |
1419 | return -EMSGSIZE; | |
4ccfe5e0 | 1420 | |
365ad353 JPM |
1421 | /* Handle implicit connection setup */ |
1422 | if (unlikely(dest)) { | |
1423 | rc = __tipc_sendmsg(sock, m, dlen); | |
1424 | if (dlen && (dlen == rc)) | |
1425 | tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); | |
39a0295f | 1426 | return rc; |
365ad353 | 1427 | } |
f214fc40 | 1428 | |
c4307285 | 1429 | do { |
365ad353 JPM |
1430 | rc = tipc_wait_for_cond(sock, &timeout, |
1431 | (!tsk->cong_link_cnt && | |
8c44e1af JPM |
1432 | !tsk_conn_cong(tsk) && |
1433 | tipc_sk_connected(sk))); | |
365ad353 JPM |
1434 | if (unlikely(rc)) |
1435 | break; | |
1436 | ||
1437 | send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE); | |
1438 | rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts); | |
1439 | if (unlikely(rc != send)) | |
1440 | break; | |
1441 | ||
1442 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
1443 | if (unlikely(rc == -ELINKCONG)) { | |
1444 | tsk->cong_link_cnt = 1; | |
1445 | rc = 0; | |
1446 | } | |
1447 | if (likely(!rc)) { | |
1448 | tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE); | |
1449 | sent += send; | |
1450 | } | |
1451 | } while (sent < dlen && !rc); | |
39a0295f | 1452 | |
3364d61c | 1453 | return sent ? sent : rc; |
b97bf3fd PL |
1454 | } |
1455 | ||
c4307285 | 1456 | /** |
4ccfe5e0 | 1457 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1458 | * @sock: socket structure |
4ccfe5e0 JPM |
1459 | * @m: message to send |
1460 | * @dsz: length of data to be transmitted | |
c4307285 | 1461 | * |
4ccfe5e0 | 1462 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1463 | * |
4ccfe5e0 | 1464 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1465 | */ |
1b784140 | 1466 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1467 | { |
4ccfe5e0 JPM |
1468 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1469 | return -EMSGSIZE; | |
b97bf3fd | 1470 | |
365ad353 | 1471 | return tipc_sendstream(sock, m, dsz); |
b97bf3fd PL |
1472 | } |
1473 | ||
dadebc00 | 1474 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1475 | */ |
301bae56 | 1476 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1477 | u32 peer_node) |
b97bf3fd | 1478 | { |
3721e9c7 YX |
1479 | struct sock *sk = &tsk->sk; |
1480 | struct net *net = sock_net(sk); | |
301bae56 | 1481 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1482 | |
dadebc00 JPM |
1483 | msg_set_destnode(msg, peer_node); |
1484 | msg_set_destport(msg, peer_port); | |
1485 | msg_set_type(msg, TIPC_CONN_MSG); | |
1486 | msg_set_lookup_scope(msg, 0); | |
1487 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1488 | |
0d5fcebf | 1489 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
8ea642ee | 1490 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d YX |
1491 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1492 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1493 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1494 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1495 | return; | |
1496 | ||
1497 | /* Fall back to message based flow control */ | |
1498 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1499 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1500 | } |
1501 | ||
1502 | /** | |
31c82a2d | 1503 | * tipc_sk_set_orig_addr - capture sender's address for received message |
b97bf3fd | 1504 | * @m: descriptor for message info |
31c82a2d | 1505 | * @hdr: received message header |
c4307285 | 1506 | * |
b97bf3fd PL |
1507 | * Note: Address is not captured if not requested by receiver. |
1508 | */ | |
31c82a2d | 1509 | static void tipc_sk_set_orig_addr(struct msghdr *m, struct sk_buff *skb) |
b97bf3fd | 1510 | { |
31c82a2d JM |
1511 | DECLARE_SOCKADDR(struct sockaddr_pair *, srcaddr, m->msg_name); |
1512 | struct tipc_msg *hdr = buf_msg(skb); | |
1513 | ||
1514 | if (!srcaddr) | |
1515 | return; | |
1516 | ||
1517 | srcaddr->sock.family = AF_TIPC; | |
1518 | srcaddr->sock.addrtype = TIPC_ADDR_ID; | |
1519 | srcaddr->sock.addr.id.ref = msg_origport(hdr); | |
1520 | srcaddr->sock.addr.id.node = msg_orignode(hdr); | |
1521 | srcaddr->sock.addr.name.domain = 0; | |
1522 | srcaddr->sock.scope = 0; | |
1523 | m->msg_namelen = sizeof(struct sockaddr_tipc); | |
1524 | ||
1525 | if (!msg_in_group(hdr)) | |
1526 | return; | |
1527 | ||
1528 | /* Group message users may also want to know sending member's id */ | |
1529 | srcaddr->member.family = AF_TIPC; | |
1530 | srcaddr->member.addrtype = TIPC_ADDR_NAME; | |
1531 | srcaddr->member.addr.name.name.type = msg_nametype(hdr); | |
1532 | srcaddr->member.addr.name.name.instance = TIPC_SKB_CB(skb)->orig_member; | |
1533 | srcaddr->member.addr.name.domain = 0; | |
1534 | m->msg_namelen = sizeof(*srcaddr); | |
b97bf3fd PL |
1535 | } |
1536 | ||
1537 | /** | |
301bae56 | 1538 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1539 | * @m: descriptor for message info |
1540 | * @msg: received message header | |
301bae56 | 1541 | * @tsk: TIPC port associated with message |
c4307285 | 1542 | * |
b97bf3fd | 1543 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1544 | * |
b97bf3fd PL |
1545 | * Returns 0 if successful, otherwise errno |
1546 | */ | |
301bae56 JPM |
1547 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1548 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1549 | { |
1550 | u32 anc_data[3]; | |
1551 | u32 err; | |
1552 | u32 dest_type; | |
3546c750 | 1553 | int has_name; |
b97bf3fd PL |
1554 | int res; |
1555 | ||
1556 | if (likely(m->msg_controllen == 0)) | |
1557 | return 0; | |
1558 | ||
1559 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1560 | err = msg ? msg_errcode(msg) : 0; |
1561 | if (unlikely(err)) { | |
1562 | anc_data[0] = err; | |
1563 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1564 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1565 | if (res) | |
b97bf3fd | 1566 | return res; |
2db9983a AS |
1567 | if (anc_data[1]) { |
1568 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1569 | msg_data(msg)); | |
1570 | if (res) | |
1571 | return res; | |
1572 | } | |
b97bf3fd PL |
1573 | } |
1574 | ||
1575 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1576 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1577 | switch (dest_type) { | |
1578 | case TIPC_NAMED_MSG: | |
3546c750 | 1579 | has_name = 1; |
b97bf3fd PL |
1580 | anc_data[0] = msg_nametype(msg); |
1581 | anc_data[1] = msg_namelower(msg); | |
1582 | anc_data[2] = msg_namelower(msg); | |
1583 | break; | |
1584 | case TIPC_MCAST_MSG: | |
3546c750 | 1585 | has_name = 1; |
b97bf3fd PL |
1586 | anc_data[0] = msg_nametype(msg); |
1587 | anc_data[1] = msg_namelower(msg); | |
1588 | anc_data[2] = msg_nameupper(msg); | |
1589 | break; | |
1590 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1591 | has_name = (tsk->conn_type != 0); |
1592 | anc_data[0] = tsk->conn_type; | |
1593 | anc_data[1] = tsk->conn_instance; | |
1594 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1595 | break; |
1596 | default: | |
3546c750 | 1597 | has_name = 0; |
b97bf3fd | 1598 | } |
2db9983a AS |
1599 | if (has_name) { |
1600 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1601 | if (res) | |
1602 | return res; | |
1603 | } | |
b97bf3fd PL |
1604 | |
1605 | return 0; | |
1606 | } | |
1607 | ||
10724cc7 | 1608 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1609 | { |
d6fb7e9c PB |
1610 | struct sock *sk = &tsk->sk; |
1611 | struct net *net = sock_net(sk); | |
a6ca1094 | 1612 | struct sk_buff *skb = NULL; |
739f5e4e | 1613 | struct tipc_msg *msg; |
301bae56 JPM |
1614 | u32 peer_port = tsk_peer_port(tsk); |
1615 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1616 | |
d6fb7e9c | 1617 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1618 | return; |
c5898636 JPM |
1619 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1620 | dnode, tsk_own_node(tsk), peer_port, | |
1621 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1622 | if (!skb) |
739f5e4e | 1623 | return; |
a6ca1094 | 1624 | msg = buf_msg(skb); |
10724cc7 JPM |
1625 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1626 | tsk->rcv_unacked = 0; | |
1627 | ||
1628 | /* Adjust to and advertize the correct window limit */ | |
1629 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1630 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1631 | msg_set_adv_win(msg, tsk->rcv_win); | |
1632 | } | |
af9b028e | 1633 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1634 | } |
1635 | ||
85d3fc94 | 1636 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1637 | { |
1638 | struct sock *sk = sock->sk; | |
1639 | DEFINE_WAIT(wait); | |
85d3fc94 | 1640 | long timeo = *timeop; |
4e0df495 PB |
1641 | int err = sock_error(sk); |
1642 | ||
1643 | if (err) | |
1644 | return err; | |
9bbb4ecc YX |
1645 | |
1646 | for (;;) { | |
1647 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1648 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1649 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1650 | err = -ENOTCONN; |
1651 | break; | |
1652 | } | |
1653 | release_sock(sk); | |
1654 | timeo = schedule_timeout(timeo); | |
1655 | lock_sock(sk); | |
1656 | } | |
1657 | err = 0; | |
1658 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1659 | break; | |
9bbb4ecc YX |
1660 | err = -EAGAIN; |
1661 | if (!timeo) | |
1662 | break; | |
143fe22f EH |
1663 | err = sock_intr_errno(timeo); |
1664 | if (signal_pending(current)) | |
1665 | break; | |
4e0df495 PB |
1666 | |
1667 | err = sock_error(sk); | |
1668 | if (err) | |
1669 | break; | |
9bbb4ecc YX |
1670 | } |
1671 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1672 | *timeop = timeo; |
9bbb4ecc YX |
1673 | return err; |
1674 | } | |
1675 | ||
c4307285 | 1676 | /** |
247f0f3c | 1677 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd | 1678 | * @m: descriptor for message info |
e9f8b101 | 1679 | * @buflen: length of user buffer area |
b97bf3fd | 1680 | * @flags: receive flags |
c4307285 | 1681 | * |
b97bf3fd PL |
1682 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1683 | * If the complete message doesn't fit in user area, truncate it. | |
1684 | * | |
1685 | * Returns size of returned message data, errno otherwise | |
1686 | */ | |
e9f8b101 JPM |
1687 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, |
1688 | size_t buflen, int flags) | |
b97bf3fd | 1689 | { |
0c3141e9 | 1690 | struct sock *sk = sock->sk; |
e9f8b101 | 1691 | bool connected = !tipc_sk_type_connectionless(sk); |
ae236fb2 | 1692 | struct tipc_sock *tsk = tipc_sk(sk); |
e9f8b101 | 1693 | int rc, err, hlen, dlen, copy; |
b7d42635 | 1694 | struct sk_buff_head xmitq; |
ae236fb2 JM |
1695 | struct tipc_msg *hdr; |
1696 | struct sk_buff *skb; | |
1697 | bool grp_evt; | |
e9f8b101 | 1698 | long timeout; |
b97bf3fd | 1699 | |
0c3141e9 | 1700 | /* Catch invalid receive requests */ |
e9f8b101 | 1701 | if (unlikely(!buflen)) |
b97bf3fd PL |
1702 | return -EINVAL; |
1703 | ||
0c3141e9 | 1704 | lock_sock(sk); |
e9f8b101 JPM |
1705 | if (unlikely(connected && sk->sk_state == TIPC_OPEN)) { |
1706 | rc = -ENOTCONN; | |
b97bf3fd PL |
1707 | goto exit; |
1708 | } | |
e9f8b101 | 1709 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1710 | |
b7d42635 | 1711 | /* Step rcv queue to first msg with data or error; wait if necessary */ |
e9f8b101 | 1712 | do { |
e9f8b101 JPM |
1713 | rc = tipc_wait_for_rcvmsg(sock, &timeout); |
1714 | if (unlikely(rc)) | |
1715 | goto exit; | |
1716 | skb = skb_peek(&sk->sk_receive_queue); | |
1717 | hdr = buf_msg(skb); | |
1718 | dlen = msg_data_sz(hdr); | |
1719 | hlen = msg_hdr_sz(hdr); | |
1720 | err = msg_errcode(hdr); | |
ae236fb2 | 1721 | grp_evt = msg_is_grp_evt(hdr); |
e9f8b101 JPM |
1722 | if (likely(dlen || err)) |
1723 | break; | |
2e84c60b | 1724 | tsk_advance_rx_queue(sk); |
e9f8b101 | 1725 | } while (1); |
b97bf3fd | 1726 | |
e9f8b101 | 1727 | /* Collect msg meta data, including error code and rejected data */ |
31c82a2d | 1728 | tipc_sk_set_orig_addr(m, skb); |
e9f8b101 JPM |
1729 | rc = tipc_sk_anc_data_recv(m, hdr, tsk); |
1730 | if (unlikely(rc)) | |
b97bf3fd PL |
1731 | goto exit; |
1732 | ||
e9f8b101 JPM |
1733 | /* Capture data if non-error msg, otherwise just set return value */ |
1734 | if (likely(!err)) { | |
1735 | copy = min_t(int, dlen, buflen); | |
1736 | if (unlikely(copy != dlen)) | |
b97bf3fd | 1737 | m->msg_flags |= MSG_TRUNC; |
e9f8b101 | 1738 | rc = skb_copy_datagram_msg(skb, hlen, m, copy); |
b97bf3fd | 1739 | } else { |
e9f8b101 JPM |
1740 | copy = 0; |
1741 | rc = 0; | |
1742 | if (err != TIPC_CONN_SHUTDOWN && connected && !m->msg_control) | |
1743 | rc = -ECONNRESET; | |
b97bf3fd | 1744 | } |
e9f8b101 JPM |
1745 | if (unlikely(rc)) |
1746 | goto exit; | |
b97bf3fd | 1747 | |
ae236fb2 JM |
1748 | /* Mark message as group event if applicable */ |
1749 | if (unlikely(grp_evt)) { | |
1750 | if (msg_grp_evt(hdr) == TIPC_WITHDRAWN) | |
1751 | m->msg_flags |= MSG_EOR; | |
1752 | m->msg_flags |= MSG_OOB; | |
1753 | copy = 0; | |
1754 | } | |
1755 | ||
e9f8b101 | 1756 | /* Caption of data or error code/rejected data was successful */ |
10724cc7 JPM |
1757 | if (unlikely(flags & MSG_PEEK)) |
1758 | goto exit; | |
1759 | ||
b7d42635 JM |
1760 | /* Send group flow control advertisement when applicable */ |
1761 | if (tsk->group && msg_in_group(hdr) && !grp_evt) { | |
1762 | skb_queue_head_init(&xmitq); | |
1763 | tipc_group_update_rcv_win(tsk->group, tsk_blocks(hlen + dlen), | |
1764 | msg_orignode(hdr), msg_origport(hdr), | |
1765 | &xmitq); | |
1766 | tipc_node_distr_xmit(sock_net(sk), &xmitq); | |
1767 | } | |
1768 | ||
10724cc7 | 1769 | tsk_advance_rx_queue(sk); |
ae236fb2 | 1770 | |
e9f8b101 JPM |
1771 | if (likely(!connected)) |
1772 | goto exit; | |
1773 | ||
b7d42635 | 1774 | /* Send connection flow control advertisement when applicable */ |
e9f8b101 JPM |
1775 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); |
1776 | if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE) | |
1777 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1778 | exit: |
0c3141e9 | 1779 | release_sock(sk); |
e9f8b101 | 1780 | return rc ? rc : copy; |
b97bf3fd PL |
1781 | } |
1782 | ||
c4307285 | 1783 | /** |
ec8a09fb | 1784 | * tipc_recvstream - receive stream-oriented data |
b97bf3fd | 1785 | * @m: descriptor for message info |
ec8a09fb | 1786 | * @buflen: total size of user buffer area |
b97bf3fd | 1787 | * @flags: receive flags |
c4307285 YH |
1788 | * |
1789 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1790 | * will optionally wait for more; never truncates data. |
1791 | * | |
1792 | * Returns size of returned message data, errno otherwise | |
1793 | */ | |
ec8a09fb JPM |
1794 | static int tipc_recvstream(struct socket *sock, struct msghdr *m, |
1795 | size_t buflen, int flags) | |
b97bf3fd | 1796 | { |
0c3141e9 | 1797 | struct sock *sk = sock->sk; |
58ed9442 | 1798 | struct tipc_sock *tsk = tipc_sk(sk); |
ec8a09fb JPM |
1799 | struct sk_buff *skb; |
1800 | struct tipc_msg *hdr; | |
1801 | struct tipc_skb_cb *skb_cb; | |
1802 | bool peek = flags & MSG_PEEK; | |
1803 | int offset, required, copy, copied = 0; | |
1804 | int hlen, dlen, err, rc; | |
1805 | long timeout; | |
b97bf3fd | 1806 | |
0c3141e9 | 1807 | /* Catch invalid receive attempts */ |
ec8a09fb | 1808 | if (unlikely(!buflen)) |
b97bf3fd PL |
1809 | return -EINVAL; |
1810 | ||
0c3141e9 | 1811 | lock_sock(sk); |
b97bf3fd | 1812 | |
438adcaf | 1813 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
ec8a09fb | 1814 | rc = -ENOTCONN; |
9bbb4ecc | 1815 | goto exit; |
b97bf3fd | 1816 | } |
ec8a09fb JPM |
1817 | required = sock_rcvlowat(sk, flags & MSG_WAITALL, buflen); |
1818 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
b97bf3fd | 1819 | |
ec8a09fb JPM |
1820 | do { |
1821 | /* Look at first msg in receive queue; wait if necessary */ | |
1822 | rc = tipc_wait_for_rcvmsg(sock, &timeout); | |
1823 | if (unlikely(rc)) | |
1824 | break; | |
1825 | skb = skb_peek(&sk->sk_receive_queue); | |
1826 | skb_cb = TIPC_SKB_CB(skb); | |
1827 | hdr = buf_msg(skb); | |
1828 | dlen = msg_data_sz(hdr); | |
1829 | hlen = msg_hdr_sz(hdr); | |
1830 | err = msg_errcode(hdr); | |
0232fd0a | 1831 | |
ec8a09fb JPM |
1832 | /* Discard any empty non-errored (SYN-) message */ |
1833 | if (unlikely(!dlen && !err)) { | |
1834 | tsk_advance_rx_queue(sk); | |
1835 | continue; | |
1836 | } | |
0232fd0a | 1837 | |
ec8a09fb JPM |
1838 | /* Collect msg meta data, incl. error code and rejected data */ |
1839 | if (!copied) { | |
31c82a2d | 1840 | tipc_sk_set_orig_addr(m, skb); |
ec8a09fb JPM |
1841 | rc = tipc_sk_anc_data_recv(m, hdr, tsk); |
1842 | if (rc) | |
1843 | break; | |
1844 | } | |
b97bf3fd | 1845 | |
ec8a09fb JPM |
1846 | /* Copy data if msg ok, otherwise return error/partial data */ |
1847 | if (likely(!err)) { | |
1848 | offset = skb_cb->bytes_read; | |
1849 | copy = min_t(int, dlen - offset, buflen - copied); | |
1850 | rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy); | |
1851 | if (unlikely(rc)) | |
1852 | break; | |
1853 | copied += copy; | |
1854 | offset += copy; | |
1855 | if (unlikely(offset < dlen)) { | |
1856 | if (!peek) | |
1857 | skb_cb->bytes_read = offset; | |
1858 | break; | |
1859 | } | |
1860 | } else { | |
1861 | rc = 0; | |
1862 | if ((err != TIPC_CONN_SHUTDOWN) && !m->msg_control) | |
1863 | rc = -ECONNRESET; | |
1864 | if (copied || rc) | |
1865 | break; | |
b97bf3fd | 1866 | } |
b97bf3fd | 1867 | |
ec8a09fb JPM |
1868 | if (unlikely(peek)) |
1869 | break; | |
b97bf3fd | 1870 | |
ec8a09fb | 1871 | tsk_advance_rx_queue(sk); |
10724cc7 | 1872 | |
ec8a09fb JPM |
1873 | /* Send connection flow control advertisement when applicable */ |
1874 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); | |
1875 | if (unlikely(tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE)) | |
1876 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1877 | |
ec8a09fb JPM |
1878 | /* Exit if all requested data or FIN/error received */ |
1879 | if (copied == buflen || err) | |
1880 | break; | |
b97bf3fd | 1881 | |
ec8a09fb | 1882 | } while (!skb_queue_empty(&sk->sk_receive_queue) || copied < required); |
b97bf3fd | 1883 | exit: |
0c3141e9 | 1884 | release_sock(sk); |
ec8a09fb | 1885 | return copied ? copied : rc; |
b97bf3fd PL |
1886 | } |
1887 | ||
f288bef4 YX |
1888 | /** |
1889 | * tipc_write_space - wake up thread if port congestion is released | |
1890 | * @sk: socket | |
1891 | */ | |
1892 | static void tipc_write_space(struct sock *sk) | |
1893 | { | |
1894 | struct socket_wq *wq; | |
1895 | ||
1896 | rcu_read_lock(); | |
1897 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1898 | if (skwq_has_sleeper(wq)) |
a9a08845 LT |
1899 | wake_up_interruptible_sync_poll(&wq->wait, EPOLLOUT | |
1900 | EPOLLWRNORM | EPOLLWRBAND); | |
f288bef4 YX |
1901 | rcu_read_unlock(); |
1902 | } | |
1903 | ||
1904 | /** | |
1905 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1906 | * @sk: socket | |
1907 | * @len: the length of messages | |
1908 | */ | |
676d2369 | 1909 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1910 | { |
1911 | struct socket_wq *wq; | |
1912 | ||
1913 | rcu_read_lock(); | |
1914 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1915 | if (skwq_has_sleeper(wq)) |
a9a08845 LT |
1916 | wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN | |
1917 | EPOLLRDNORM | EPOLLRDBAND); | |
f288bef4 YX |
1918 | rcu_read_unlock(); |
1919 | } | |
1920 | ||
f4195d1e YX |
1921 | static void tipc_sock_destruct(struct sock *sk) |
1922 | { | |
1923 | __skb_queue_purge(&sk->sk_receive_queue); | |
1924 | } | |
1925 | ||
64ac5f59 JM |
1926 | static void tipc_sk_proto_rcv(struct sock *sk, |
1927 | struct sk_buff_head *inputq, | |
1928 | struct sk_buff_head *xmitq) | |
1929 | { | |
1930 | struct sk_buff *skb = __skb_dequeue(inputq); | |
1931 | struct tipc_sock *tsk = tipc_sk(sk); | |
1932 | struct tipc_msg *hdr = buf_msg(skb); | |
75da2163 | 1933 | struct tipc_group *grp = tsk->group; |
b7d42635 | 1934 | bool wakeup = false; |
64ac5f59 JM |
1935 | |
1936 | switch (msg_user(hdr)) { | |
1937 | case CONN_MANAGER: | |
1938 | tipc_sk_conn_proto_rcv(tsk, skb, xmitq); | |
1939 | return; | |
1940 | case SOCK_WAKEUP: | |
a80ae530 | 1941 | tipc_dest_del(&tsk->cong_links, msg_orignode(hdr), 0); |
64ac5f59 | 1942 | tsk->cong_link_cnt--; |
b7d42635 | 1943 | wakeup = true; |
64ac5f59 | 1944 | break; |
75da2163 | 1945 | case GROUP_PROTOCOL: |
b7d42635 | 1946 | tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq); |
75da2163 | 1947 | break; |
64ac5f59 | 1948 | case TOP_SRV: |
b7d42635 | 1949 | tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf, |
7ad32bcb | 1950 | hdr, inputq, xmitq); |
64ac5f59 JM |
1951 | break; |
1952 | default: | |
1953 | break; | |
1954 | } | |
1955 | ||
b7d42635 JM |
1956 | if (wakeup) |
1957 | sk->sk_write_space(sk); | |
1958 | ||
64ac5f59 JM |
1959 | kfree_skb(skb); |
1960 | } | |
1961 | ||
7e6c131e | 1962 | /** |
64ac5f59 | 1963 | * tipc_filter_connect - Handle incoming message for a connection-based socket |
58ed9442 | 1964 | * @tsk: TIPC socket |
1186adf7 | 1965 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1966 | * |
cda3696d | 1967 | * Returns true if everything ok, false otherwise |
7e6c131e | 1968 | */ |
64ac5f59 | 1969 | static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1970 | { |
58ed9442 | 1971 | struct sock *sk = &tsk->sk; |
f2f9800d | 1972 | struct net *net = sock_net(sk); |
cda3696d | 1973 | struct tipc_msg *hdr = buf_msg(skb); |
4e0df495 PB |
1974 | u32 pport = msg_origport(hdr); |
1975 | u32 pnode = msg_orignode(hdr); | |
7e6c131e | 1976 | |
cda3696d JPM |
1977 | if (unlikely(msg_mcast(hdr))) |
1978 | return false; | |
7e6c131e | 1979 | |
99a20889 PB |
1980 | switch (sk->sk_state) { |
1981 | case TIPC_CONNECTING: | |
cda3696d | 1982 | /* Accept only ACK or NACK message */ |
4e0df495 PB |
1983 | if (unlikely(!msg_connected(hdr))) { |
1984 | if (pport != tsk_peer_port(tsk) || | |
1985 | pnode != tsk_peer_node(tsk)) | |
1986 | return false; | |
1987 | ||
1988 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1989 | sk->sk_err = ECONNREFUSED; | |
1990 | sk->sk_state_change(sk); | |
1991 | return true; | |
1992 | } | |
dadebc00 | 1993 | |
cda3696d | 1994 | if (unlikely(msg_errcode(hdr))) { |
9fd4b070 | 1995 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2c8d8518 | 1996 | sk->sk_err = ECONNREFUSED; |
4e0df495 | 1997 | sk->sk_state_change(sk); |
cda3696d | 1998 | return true; |
584d24b3 YX |
1999 | } |
2000 | ||
cda3696d | 2001 | if (unlikely(!msg_isdata(hdr))) { |
9fd4b070 | 2002 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
dadebc00 | 2003 | sk->sk_err = EINVAL; |
4e0df495 | 2004 | sk->sk_state_change(sk); |
cda3696d | 2005 | return true; |
584d24b3 YX |
2006 | } |
2007 | ||
cda3696d JPM |
2008 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
2009 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 | 2010 | |
cda3696d JPM |
2011 | /* If 'ACK+' message, add to socket receive queue */ |
2012 | if (msg_data_sz(hdr)) | |
2013 | return true; | |
2014 | ||
2015 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
42b531de | 2016 | sk->sk_data_ready(sk); |
cda3696d JPM |
2017 | |
2018 | /* 'ACK-' message is neither accepted nor rejected: */ | |
2019 | msg_set_dest_droppable(hdr, 1); | |
2020 | return false; | |
cda3696d | 2021 | |
438adcaf | 2022 | case TIPC_OPEN: |
9fd4b070 | 2023 | case TIPC_DISCONNECTING: |
438adcaf PB |
2024 | break; |
2025 | case TIPC_LISTEN: | |
7e6c131e | 2026 | /* Accept only SYN message */ |
cda3696d JPM |
2027 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
2028 | return true; | |
7e6c131e | 2029 | break; |
f40acbaf PB |
2030 | case TIPC_ESTABLISHED: |
2031 | /* Accept only connection-based messages sent by peer */ | |
2032 | if (unlikely(!tsk_peer_msg(tsk, hdr))) | |
2033 | return false; | |
2034 | ||
2035 | if (unlikely(msg_errcode(hdr))) { | |
2036 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2037 | /* Let timer expire on it's own */ | |
2038 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
2039 | tsk->portid); | |
2040 | sk->sk_state_change(sk); | |
2041 | } | |
2042 | return true; | |
7e6c131e | 2043 | default: |
438adcaf | 2044 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 2045 | } |
438adcaf | 2046 | |
cda3696d | 2047 | return false; |
7e6c131e YX |
2048 | } |
2049 | ||
aba79f33 YX |
2050 | /** |
2051 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
2052 | * @sk: socket | |
10724cc7 | 2053 | * @skb: message |
aba79f33 | 2054 | * |
10724cc7 JPM |
2055 | * For connection oriented messages, irrespective of importance, |
2056 | * default queue limit is 2 MB. | |
aba79f33 | 2057 | * |
10724cc7 JPM |
2058 | * For connectionless messages, queue limits are based on message |
2059 | * importance as follows: | |
aba79f33 | 2060 | * |
10724cc7 JPM |
2061 | * TIPC_LOW_IMPORTANCE (2 MB) |
2062 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
2063 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
2064 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
2065 | * |
2066 | * Returns overload limit according to corresponding message importance | |
2067 | */ | |
10724cc7 | 2068 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 2069 | { |
10724cc7 JPM |
2070 | struct tipc_sock *tsk = tipc_sk(sk); |
2071 | struct tipc_msg *hdr = buf_msg(skb); | |
2072 | ||
b7d42635 JM |
2073 | if (unlikely(msg_in_group(hdr))) |
2074 | return sk->sk_rcvbuf; | |
2075 | ||
10724cc7 JPM |
2076 | if (unlikely(!msg_connected(hdr))) |
2077 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 2078 | |
10724cc7 JPM |
2079 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
2080 | return sk->sk_rcvbuf; | |
0cee6bbe | 2081 | |
10724cc7 | 2082 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
2083 | } |
2084 | ||
c4307285 | 2085 | /** |
64ac5f59 | 2086 | * tipc_sk_filter_rcv - validate incoming message |
0c3141e9 | 2087 | * @sk: socket |
cda3696d | 2088 | * @skb: pointer to message. |
c4307285 | 2089 | * |
0c3141e9 AS |
2090 | * Enqueues message on receive queue if acceptable; optionally handles |
2091 | * disconnect indication for a connected socket. | |
2092 | * | |
1186adf7 | 2093 | * Called with socket lock already taken |
c4307285 | 2094 | * |
b97bf3fd | 2095 | */ |
64ac5f59 JM |
2096 | static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb, |
2097 | struct sk_buff_head *xmitq) | |
b97bf3fd | 2098 | { |
64ac5f59 | 2099 | bool sk_conn = !tipc_sk_type_connectionless(sk); |
58ed9442 | 2100 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2101 | struct tipc_group *grp = tsk->group; |
cda3696d | 2102 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
2103 | struct net *net = sock_net(sk); |
2104 | struct sk_buff_head inputq; | |
2105 | int limit, err = TIPC_OK; | |
ec8a2e56 | 2106 | |
64ac5f59 JM |
2107 | TIPC_SKB_CB(skb)->bytes_read = 0; |
2108 | __skb_queue_head_init(&inputq); | |
2109 | __skb_queue_tail(&inputq, skb); | |
50100a5e | 2110 | |
64ac5f59 JM |
2111 | if (unlikely(!msg_isdata(hdr))) |
2112 | tipc_sk_proto_rcv(sk, &inputq, xmitq); | |
0c3141e9 | 2113 | |
75da2163 JM |
2114 | if (unlikely(grp)) |
2115 | tipc_group_filter_msg(grp, &inputq, xmitq); | |
2116 | ||
64ac5f59 JM |
2117 | /* Validate and add to receive buffer if there is space */ |
2118 | while ((skb = __skb_dequeue(&inputq))) { | |
2119 | hdr = buf_msg(skb); | |
2120 | limit = rcvbuf_limit(sk, skb); | |
2121 | if ((sk_conn && !tipc_sk_filter_connect(tsk, skb)) || | |
75da2163 JM |
2122 | (!sk_conn && msg_connected(hdr)) || |
2123 | (!grp && msg_in_group(hdr))) | |
cda3696d | 2124 | err = TIPC_ERR_NO_PORT; |
64ac5f59 JM |
2125 | else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) |
2126 | err = TIPC_ERR_OVERLOAD; | |
b97bf3fd | 2127 | |
64ac5f59 JM |
2128 | if (unlikely(err)) { |
2129 | tipc_skb_reject(net, err, skb, xmitq); | |
2130 | err = TIPC_OK; | |
2131 | continue; | |
2132 | } | |
2133 | __skb_queue_tail(&sk->sk_receive_queue, skb); | |
2134 | skb_set_owner_r(skb, sk); | |
2135 | sk->sk_data_ready(sk); | |
cda3696d | 2136 | } |
0c3141e9 | 2137 | } |
b97bf3fd | 2138 | |
0c3141e9 | 2139 | /** |
64ac5f59 | 2140 | * tipc_sk_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 2141 | * @sk: socket |
a6ca1094 | 2142 | * @skb: message |
0c3141e9 | 2143 | * |
e3a77561 | 2144 | * Caller must hold socket lock |
0c3141e9 | 2145 | */ |
64ac5f59 | 2146 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 2147 | { |
64ac5f59 | 2148 | unsigned int before = sk_rmem_alloc_get(sk); |
f1d048f2 | 2149 | struct sk_buff_head xmitq; |
64ac5f59 | 2150 | unsigned int added; |
0c3141e9 | 2151 | |
f1d048f2 JPM |
2152 | __skb_queue_head_init(&xmitq); |
2153 | ||
64ac5f59 JM |
2154 | tipc_sk_filter_rcv(sk, skb, &xmitq); |
2155 | added = sk_rmem_alloc_get(sk) - before; | |
2156 | atomic_add(added, &tipc_sk(sk)->dupl_rcvcnt); | |
f1d048f2 | 2157 | |
64ac5f59 | 2158 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2159 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
0c3141e9 AS |
2160 | return 0; |
2161 | } | |
2162 | ||
d570d864 | 2163 | /** |
c637c103 JPM |
2164 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
2165 | * inputq and try adding them to socket or backlog queue | |
2166 | * @inputq: list of incoming buffers with potentially different destinations | |
2167 | * @sk: socket where the buffers should be enqueued | |
2168 | * @dport: port number for the socket | |
d570d864 JPM |
2169 | * |
2170 | * Caller must hold socket lock | |
d570d864 | 2171 | */ |
cda3696d | 2172 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 2173 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 2174 | { |
f1d048f2 JPM |
2175 | unsigned long time_limit = jiffies + 2; |
2176 | struct sk_buff *skb; | |
d570d864 JPM |
2177 | unsigned int lim; |
2178 | atomic_t *dcnt; | |
f1d048f2 | 2179 | u32 onode; |
c637c103 JPM |
2180 | |
2181 | while (skb_queue_len(inputq)) { | |
51a00daf | 2182 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
2183 | return; |
2184 | ||
c637c103 JPM |
2185 | skb = tipc_skb_dequeue(inputq, dport); |
2186 | if (unlikely(!skb)) | |
cda3696d JPM |
2187 | return; |
2188 | ||
2189 | /* Add message directly to receive queue if possible */ | |
c637c103 | 2190 | if (!sock_owned_by_user(sk)) { |
64ac5f59 | 2191 | tipc_sk_filter_rcv(sk, skb, xmitq); |
cda3696d | 2192 | continue; |
c637c103 | 2193 | } |
cda3696d JPM |
2194 | |
2195 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 2196 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 2197 | if (!sk->sk_backlog.len) |
c637c103 JPM |
2198 | atomic_set(dcnt, 0); |
2199 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
2200 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
2201 | continue; | |
cda3696d JPM |
2202 | |
2203 | /* Overload => reject message back to sender */ | |
f1d048f2 JPM |
2204 | onode = tipc_own_addr(sock_net(sk)); |
2205 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) | |
2206 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 2207 | break; |
c637c103 | 2208 | } |
d570d864 JPM |
2209 | } |
2210 | ||
0c3141e9 | 2211 | /** |
c637c103 JPM |
2212 | * tipc_sk_rcv - handle a chain of incoming buffers |
2213 | * @inputq: buffer list containing the buffers | |
2214 | * Consumes all buffers in list until inputq is empty | |
2215 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 2216 | */ |
cda3696d | 2217 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 2218 | { |
f1d048f2 | 2219 | struct sk_buff_head xmitq; |
c637c103 | 2220 | u32 dnode, dport = 0; |
9871b27f | 2221 | int err; |
9816f061 | 2222 | struct tipc_sock *tsk; |
9816f061 | 2223 | struct sock *sk; |
cda3696d | 2224 | struct sk_buff *skb; |
9816f061 | 2225 | |
f1d048f2 | 2226 | __skb_queue_head_init(&xmitq); |
c637c103 | 2227 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
2228 | dport = tipc_skb_peek_port(inputq, dport); |
2229 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 2230 | |
c637c103 JPM |
2231 | if (likely(tsk)) { |
2232 | sk = &tsk->sk; | |
2233 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 2234 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 2235 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 2236 | } |
f1d048f2 | 2237 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2238 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
c637c103 | 2239 | sock_put(sk); |
c637c103 | 2240 | continue; |
c637c103 | 2241 | } |
cda3696d JPM |
2242 | /* No destination socket => dequeue skb if still there */ |
2243 | skb = tipc_skb_dequeue(inputq, dport); | |
2244 | if (!skb) | |
2245 | return; | |
2246 | ||
2247 | /* Try secondary lookup if unresolved named message */ | |
2248 | err = TIPC_ERR_NO_PORT; | |
2249 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
2250 | goto xmit; | |
2251 | ||
2252 | /* Prepare for message rejection */ | |
2253 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 2254 | continue; |
e3a77561 | 2255 | xmit: |
cda3696d | 2256 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 2257 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 2258 | } |
b97bf3fd PL |
2259 | } |
2260 | ||
78eb3a53 YX |
2261 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
2262 | { | |
d9dc8b0f | 2263 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 2264 | struct sock *sk = sock->sk; |
78eb3a53 YX |
2265 | int done; |
2266 | ||
2267 | do { | |
2268 | int err = sock_error(sk); | |
2269 | if (err) | |
2270 | return err; | |
2271 | if (!*timeo_p) | |
2272 | return -ETIMEDOUT; | |
2273 | if (signal_pending(current)) | |
2274 | return sock_intr_errno(*timeo_p); | |
2275 | ||
d9dc8b0f | 2276 | add_wait_queue(sk_sleep(sk), &wait); |
99a20889 | 2277 | done = sk_wait_event(sk, timeo_p, |
d9dc8b0f WC |
2278 | sk->sk_state != TIPC_CONNECTING, &wait); |
2279 | remove_wait_queue(sk_sleep(sk), &wait); | |
78eb3a53 YX |
2280 | } while (!done); |
2281 | return 0; | |
2282 | } | |
2283 | ||
b97bf3fd | 2284 | /** |
247f0f3c | 2285 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
2286 | * @sock: socket structure |
2287 | * @dest: socket address for destination port | |
2288 | * @destlen: size of socket address data structure | |
0c3141e9 | 2289 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
2290 | * |
2291 | * Returns 0 on success, errno otherwise | |
2292 | */ | |
247f0f3c YX |
2293 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
2294 | int destlen, int flags) | |
b97bf3fd | 2295 | { |
0c3141e9 | 2296 | struct sock *sk = sock->sk; |
f2f8036e | 2297 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
2298 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
2299 | struct msghdr m = {NULL,}; | |
f2f8036e | 2300 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 2301 | int previous; |
f2f8036e | 2302 | int res = 0; |
b89741a0 | 2303 | |
23998835 JM |
2304 | if (destlen != sizeof(struct sockaddr_tipc)) |
2305 | return -EINVAL; | |
2306 | ||
0c3141e9 AS |
2307 | lock_sock(sk); |
2308 | ||
75da2163 JM |
2309 | if (tsk->group) { |
2310 | res = -EINVAL; | |
2311 | goto exit; | |
2312 | } | |
2313 | ||
23998835 JM |
2314 | if (dst->family == AF_UNSPEC) { |
2315 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); | |
2316 | if (!tipc_sk_type_connectionless(sk)) | |
610600c8 | 2317 | res = -EINVAL; |
0c3141e9 | 2318 | goto exit; |
23998835 JM |
2319 | } else if (dst->family != AF_TIPC) { |
2320 | res = -EINVAL; | |
0c3141e9 | 2321 | } |
23998835 | 2322 | if (dst->addrtype != TIPC_ADDR_ID && dst->addrtype != TIPC_ADDR_NAME) |
0c3141e9 | 2323 | res = -EINVAL; |
23998835 JM |
2324 | if (res) |
2325 | goto exit; | |
2326 | ||
2327 | /* DGRAM/RDM connect(), just save the destaddr */ | |
2328 | if (tipc_sk_type_connectionless(sk)) { | |
2329 | memcpy(&tsk->peer, dest, destlen); | |
0c3141e9 AS |
2330 | goto exit; |
2331 | } | |
2332 | ||
99a20889 | 2333 | previous = sk->sk_state; |
438adcaf PB |
2334 | |
2335 | switch (sk->sk_state) { | |
2336 | case TIPC_OPEN: | |
584d24b3 YX |
2337 | /* Send a 'SYN-' to destination */ |
2338 | m.msg_name = dest; | |
2339 | m.msg_namelen = destlen; | |
2340 | ||
2341 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
2342 | * indicate send_msg() is never blocked. | |
2343 | */ | |
2344 | if (!timeout) | |
2345 | m.msg_flags = MSG_DONTWAIT; | |
2346 | ||
39a0295f | 2347 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
2348 | if ((res < 0) && (res != -EWOULDBLOCK)) |
2349 | goto exit; | |
2350 | ||
99a20889 | 2351 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
2352 | * difference is that return value in non-blocking |
2353 | * case is EINPROGRESS, rather than EALREADY. | |
2354 | */ | |
2355 | res = -EINPROGRESS; | |
99a20889 PB |
2356 | /* fall thru' */ |
2357 | case TIPC_CONNECTING: | |
2358 | if (!timeout) { | |
2359 | if (previous == TIPC_CONNECTING) | |
2360 | res = -EALREADY; | |
78eb3a53 | 2361 | goto exit; |
99a20889 | 2362 | } |
78eb3a53 YX |
2363 | timeout = msecs_to_jiffies(timeout); |
2364 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
2365 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
2366 | break; |
2367 | case TIPC_ESTABLISHED: | |
584d24b3 | 2368 | res = -EISCONN; |
f40acbaf PB |
2369 | break; |
2370 | default: | |
584d24b3 | 2371 | res = -EINVAL; |
f40acbaf | 2372 | } |
99a20889 | 2373 | |
0c3141e9 AS |
2374 | exit: |
2375 | release_sock(sk); | |
b89741a0 | 2376 | return res; |
b97bf3fd PL |
2377 | } |
2378 | ||
c4307285 | 2379 | /** |
247f0f3c | 2380 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
2381 | * @sock: socket structure |
2382 | * @len: (unused) | |
c4307285 | 2383 | * |
b97bf3fd PL |
2384 | * Returns 0 on success, errno otherwise |
2385 | */ | |
247f0f3c | 2386 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 2387 | { |
0c3141e9 AS |
2388 | struct sock *sk = sock->sk; |
2389 | int res; | |
2390 | ||
2391 | lock_sock(sk); | |
0c288c86 | 2392 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 2393 | release_sock(sk); |
0c288c86 | 2394 | |
0c3141e9 | 2395 | return res; |
b97bf3fd PL |
2396 | } |
2397 | ||
6398e23c YX |
2398 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2399 | { | |
2400 | struct sock *sk = sock->sk; | |
2401 | DEFINE_WAIT(wait); | |
2402 | int err; | |
2403 | ||
2404 | /* True wake-one mechanism for incoming connections: only | |
2405 | * one process gets woken up, not the 'whole herd'. | |
2406 | * Since we do not 'race & poll' for established sockets | |
2407 | * anymore, the common case will execute the loop only once. | |
2408 | */ | |
2409 | for (;;) { | |
2410 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2411 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2412 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2413 | release_sock(sk); |
2414 | timeo = schedule_timeout(timeo); | |
2415 | lock_sock(sk); | |
2416 | } | |
2417 | err = 0; | |
2418 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2419 | break; | |
6398e23c YX |
2420 | err = -EAGAIN; |
2421 | if (!timeo) | |
2422 | break; | |
143fe22f EH |
2423 | err = sock_intr_errno(timeo); |
2424 | if (signal_pending(current)) | |
2425 | break; | |
6398e23c YX |
2426 | } |
2427 | finish_wait(sk_sleep(sk), &wait); | |
2428 | return err; | |
2429 | } | |
2430 | ||
c4307285 | 2431 | /** |
247f0f3c | 2432 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2433 | * @sock: listening socket |
2434 | * @newsock: new socket that is to be connected | |
2435 | * @flags: file-related flags associated with socket | |
c4307285 | 2436 | * |
b97bf3fd PL |
2437 | * Returns 0 on success, errno otherwise |
2438 | */ | |
cdfbabfb DH |
2439 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
2440 | bool kern) | |
b97bf3fd | 2441 | { |
0fef8f20 | 2442 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2443 | struct sk_buff *buf; |
301bae56 | 2444 | struct tipc_sock *new_tsock; |
0fef8f20 | 2445 | struct tipc_msg *msg; |
6398e23c | 2446 | long timeo; |
0c3141e9 | 2447 | int res; |
b97bf3fd | 2448 | |
0c3141e9 | 2449 | lock_sock(sk); |
b97bf3fd | 2450 | |
0c288c86 | 2451 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2452 | res = -EINVAL; |
b97bf3fd PL |
2453 | goto exit; |
2454 | } | |
6398e23c YX |
2455 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2456 | res = tipc_wait_for_accept(sock, timeo); | |
2457 | if (res) | |
2458 | goto exit; | |
0c3141e9 AS |
2459 | |
2460 | buf = skb_peek(&sk->sk_receive_queue); | |
2461 | ||
cdfbabfb | 2462 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern); |
0fef8f20 PG |
2463 | if (res) |
2464 | goto exit; | |
fdd75ea8 | 2465 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2466 | |
0fef8f20 | 2467 | new_sk = new_sock->sk; |
301bae56 | 2468 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2469 | msg = buf_msg(buf); |
b97bf3fd | 2470 | |
0fef8f20 PG |
2471 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2472 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2473 | ||
2474 | /* | |
2475 | * Reject any stray messages received by new socket | |
2476 | * before the socket lock was taken (very, very unlikely) | |
2477 | */ | |
2e84c60b | 2478 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2479 | |
2480 | /* Connect new socket to it's peer */ | |
301bae56 | 2481 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2482 | |
301bae56 | 2483 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2484 | if (msg_named(msg)) { |
301bae56 JPM |
2485 | new_tsock->conn_type = msg_nametype(msg); |
2486 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2487 | } |
0fef8f20 PG |
2488 | |
2489 | /* | |
2490 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2491 | * Respond to 'SYN+' by queuing it on new socket. | |
2492 | */ | |
2493 | if (!msg_data_sz(msg)) { | |
2494 | struct msghdr m = {NULL,}; | |
2495 | ||
2e84c60b | 2496 | tsk_advance_rx_queue(sk); |
365ad353 | 2497 | __tipc_sendstream(new_sock, &m, 0); |
0fef8f20 PG |
2498 | } else { |
2499 | __skb_dequeue(&sk->sk_receive_queue); | |
2500 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2501 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2502 | } |
2503 | release_sock(new_sk); | |
b97bf3fd | 2504 | exit: |
0c3141e9 | 2505 | release_sock(sk); |
b97bf3fd PL |
2506 | return res; |
2507 | } | |
2508 | ||
2509 | /** | |
247f0f3c | 2510 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2511 | * @sock: socket structure |
e247a8f5 | 2512 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2513 | * |
2514 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2515 | * |
b97bf3fd PL |
2516 | * Returns 0 on success, errno otherwise |
2517 | */ | |
247f0f3c | 2518 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2519 | { |
0c3141e9 | 2520 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2521 | int res; |
2522 | ||
e247a8f5 AS |
2523 | if (how != SHUT_RDWR) |
2524 | return -EINVAL; | |
b97bf3fd | 2525 | |
0c3141e9 | 2526 | lock_sock(sk); |
b97bf3fd | 2527 | |
6f00089c PB |
2528 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2529 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2530 | |
6f00089c | 2531 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2532 | /* Discard any unreceived messages */ |
57467e56 | 2533 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2534 | |
2535 | /* Wake up anyone sleeping in poll */ | |
2536 | sk->sk_state_change(sk); | |
b97bf3fd | 2537 | res = 0; |
6f00089c | 2538 | } else { |
b97bf3fd PL |
2539 | res = -ENOTCONN; |
2540 | } | |
2541 | ||
0c3141e9 | 2542 | release_sock(sk); |
b97bf3fd PL |
2543 | return res; |
2544 | } | |
2545 | ||
31b102bb | 2546 | static void tipc_sk_timeout(struct timer_list *t) |
57289015 | 2547 | { |
31b102bb KC |
2548 | struct sock *sk = from_timer(sk, t, sk_timer); |
2549 | struct tipc_sock *tsk = tipc_sk(sk); | |
0d5fcebf JM |
2550 | u32 peer_port = tsk_peer_port(tsk); |
2551 | u32 peer_node = tsk_peer_node(tsk); | |
2552 | u32 own_node = tsk_own_node(tsk); | |
2553 | u32 own_port = tsk->portid; | |
0d5fcebf | 2554 | struct net *net = sock_net(sk); |
a6ca1094 | 2555 | struct sk_buff *skb = NULL; |
57289015 | 2556 | |
6c9808ce | 2557 | bh_lock_sock(sk); |
0d5fcebf JM |
2558 | if (!tipc_sk_connected(sk)) |
2559 | goto exit; | |
2560 | ||
2561 | /* Try again later if socket is busy */ | |
2562 | if (sock_owned_by_user(sk)) { | |
2563 | sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20); | |
6c9808ce | 2564 | goto exit; |
57289015 | 2565 | } |
57289015 | 2566 | |
8ea642ee | 2567 | if (tsk->probe_unacked) { |
0d5fcebf JM |
2568 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2569 | tipc_node_remove_conn(net, peer_node, peer_port); | |
2570 | sk->sk_state_change(sk); | |
360aab6b | 2571 | goto exit; |
57289015 | 2572 | } |
0d5fcebf JM |
2573 | /* Send new probe */ |
2574 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0, | |
2575 | peer_node, own_node, peer_port, own_port, | |
2576 | TIPC_OK); | |
8ea642ee | 2577 | tsk->probe_unacked = true; |
0d5fcebf JM |
2578 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
2579 | exit: | |
57289015 | 2580 | bh_unlock_sock(sk); |
a6ca1094 | 2581 | if (skb) |
0d5fcebf | 2582 | tipc_node_xmit_skb(net, skb, peer_node, own_port); |
07f6c4bc | 2583 | sock_put(sk); |
57289015 JPM |
2584 | } |
2585 | ||
301bae56 | 2586 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2587 | struct tipc_name_seq const *seq) |
2588 | { | |
d6fb7e9c PB |
2589 | struct sock *sk = &tsk->sk; |
2590 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2591 | struct publication *publ; |
2592 | u32 key; | |
2593 | ||
928df188 JM |
2594 | if (scope != TIPC_NODE_SCOPE) |
2595 | scope = TIPC_CLUSTER_SCOPE; | |
2596 | ||
d6fb7e9c | 2597 | if (tipc_sk_connected(sk)) |
0fc87aae | 2598 | return -EINVAL; |
07f6c4bc YX |
2599 | key = tsk->portid + tsk->pub_count + 1; |
2600 | if (key == tsk->portid) | |
0fc87aae JPM |
2601 | return -EADDRINUSE; |
2602 | ||
f2f9800d | 2603 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2604 | scope, tsk->portid, key); |
0fc87aae JPM |
2605 | if (unlikely(!publ)) |
2606 | return -EINVAL; | |
2607 | ||
e50e73e1 | 2608 | list_add(&publ->binding_sock, &tsk->publications); |
301bae56 JPM |
2609 | tsk->pub_count++; |
2610 | tsk->published = 1; | |
0fc87aae JPM |
2611 | return 0; |
2612 | } | |
2613 | ||
301bae56 | 2614 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2615 | struct tipc_name_seq const *seq) |
2616 | { | |
f2f9800d | 2617 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2618 | struct publication *publ; |
2619 | struct publication *safe; | |
2620 | int rc = -EINVAL; | |
2621 | ||
928df188 JM |
2622 | if (scope != TIPC_NODE_SCOPE) |
2623 | scope = TIPC_CLUSTER_SCOPE; | |
2624 | ||
e50e73e1 | 2625 | list_for_each_entry_safe(publ, safe, &tsk->publications, binding_sock) { |
0fc87aae JPM |
2626 | if (seq) { |
2627 | if (publ->scope != scope) | |
2628 | continue; | |
2629 | if (publ->type != seq->type) | |
2630 | continue; | |
2631 | if (publ->lower != seq->lower) | |
2632 | continue; | |
2633 | if (publ->upper != seq->upper) | |
2634 | break; | |
f2f9800d | 2635 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
e50e73e1 | 2636 | publ->port, publ->key); |
0fc87aae JPM |
2637 | rc = 0; |
2638 | break; | |
2639 | } | |
f2f9800d | 2640 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
e50e73e1 | 2641 | publ->port, publ->key); |
0fc87aae JPM |
2642 | rc = 0; |
2643 | } | |
301bae56 JPM |
2644 | if (list_empty(&tsk->publications)) |
2645 | tsk->published = 0; | |
0fc87aae JPM |
2646 | return rc; |
2647 | } | |
2648 | ||
5a9ee0be JPM |
2649 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2650 | * when we go from standalone to network mode. | |
2651 | */ | |
e05b31f4 | 2652 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2653 | { |
e05b31f4 | 2654 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
40f9f439 | 2655 | struct rhashtable_iter iter; |
07f6c4bc | 2656 | struct tipc_sock *tsk; |
5a9ee0be | 2657 | struct tipc_msg *msg; |
5a9ee0be | 2658 | |
40f9f439 HX |
2659 | rhashtable_walk_enter(&tn->sk_rht, &iter); |
2660 | ||
2661 | do { | |
97a6ec4a | 2662 | rhashtable_walk_start(&iter); |
40f9f439 HX |
2663 | |
2664 | while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) { | |
07f6c4bc YX |
2665 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
2666 | msg = &tsk->phdr; | |
34747539 YX |
2667 | msg_set_prevnode(msg, tn->own_addr); |
2668 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2669 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2670 | } | |
97a6ec4a | 2671 | |
40f9f439 HX |
2672 | rhashtable_walk_stop(&iter); |
2673 | } while (tsk == ERR_PTR(-EAGAIN)); | |
5a9ee0be JPM |
2674 | } |
2675 | ||
e05b31f4 | 2676 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2677 | { |
e05b31f4 | 2678 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2679 | struct tipc_sock *tsk; |
808d90f9 | 2680 | |
07f6c4bc | 2681 | rcu_read_lock(); |
6cca7289 | 2682 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2683 | if (tsk) |
2684 | sock_hold(&tsk->sk); | |
2685 | rcu_read_unlock(); | |
808d90f9 | 2686 | |
07f6c4bc | 2687 | return tsk; |
808d90f9 JPM |
2688 | } |
2689 | ||
07f6c4bc | 2690 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2691 | { |
e05b31f4 YX |
2692 | struct sock *sk = &tsk->sk; |
2693 | struct net *net = sock_net(sk); | |
2694 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2695 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2696 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2697 | |
07f6c4bc YX |
2698 | while (remaining--) { |
2699 | portid++; | |
2700 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2701 | portid = TIPC_MIN_PORT; | |
2702 | tsk->portid = portid; | |
2703 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2704 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2705 | tsk_rht_params)) | |
07f6c4bc YX |
2706 | return 0; |
2707 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2708 | } |
2709 | ||
07f6c4bc | 2710 | return -1; |
808d90f9 JPM |
2711 | } |
2712 | ||
07f6c4bc | 2713 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2714 | { |
07f6c4bc | 2715 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2716 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2717 | |
6cca7289 | 2718 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
41c6d650 | 2719 | WARN_ON(refcount_read(&sk->sk_refcnt) == 1); |
07f6c4bc | 2720 | __sock_put(sk); |
808d90f9 | 2721 | } |
808d90f9 JPM |
2722 | } |
2723 | ||
6cca7289 HX |
2724 | static const struct rhashtable_params tsk_rht_params = { |
2725 | .nelem_hint = 192, | |
2726 | .head_offset = offsetof(struct tipc_sock, node), | |
2727 | .key_offset = offsetof(struct tipc_sock, portid), | |
2728 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2729 | .max_size = 1048576, |
2730 | .min_size = 256, | |
b5e2c150 | 2731 | .automatic_shrinking = true, |
6cca7289 HX |
2732 | }; |
2733 | ||
e05b31f4 | 2734 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2735 | { |
e05b31f4 | 2736 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2737 | |
2738 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2739 | } |
2740 | ||
e05b31f4 | 2741 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2742 | { |
e05b31f4 YX |
2743 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2744 | ||
07f6c4bc YX |
2745 | /* Wait for socket readers to complete */ |
2746 | synchronize_net(); | |
808d90f9 | 2747 | |
e05b31f4 | 2748 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2749 | } |
2750 | ||
75da2163 JM |
2751 | static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq) |
2752 | { | |
2753 | struct net *net = sock_net(&tsk->sk); | |
75da2163 JM |
2754 | struct tipc_group *grp = tsk->group; |
2755 | struct tipc_msg *hdr = &tsk->phdr; | |
2756 | struct tipc_name_seq seq; | |
2757 | int rc; | |
2758 | ||
2759 | if (mreq->type < TIPC_RESERVED_TYPES) | |
2760 | return -EACCES; | |
232d07b7 JM |
2761 | if (mreq->scope > TIPC_NODE_SCOPE) |
2762 | return -EINVAL; | |
75da2163 JM |
2763 | if (grp) |
2764 | return -EACCES; | |
60c25306 | 2765 | grp = tipc_group_create(net, tsk->portid, mreq, &tsk->group_is_open); |
75da2163 JM |
2766 | if (!grp) |
2767 | return -ENOMEM; | |
2768 | tsk->group = grp; | |
2769 | msg_set_lookup_scope(hdr, mreq->scope); | |
2770 | msg_set_nametype(hdr, mreq->type); | |
2771 | msg_set_dest_droppable(hdr, true); | |
2772 | seq.type = mreq->type; | |
2773 | seq.lower = mreq->instance; | |
2774 | seq.upper = seq.lower; | |
232d07b7 | 2775 | tipc_nametbl_build_group(net, grp, mreq->type, mreq->scope); |
75da2163 | 2776 | rc = tipc_sk_publish(tsk, mreq->scope, &seq); |
e233df01 | 2777 | if (rc) { |
75da2163 | 2778 | tipc_group_delete(net, grp); |
e233df01 | 2779 | tsk->group = NULL; |
febafc84 | 2780 | return rc; |
e233df01 | 2781 | } |
d12d2e12 | 2782 | /* Eliminate any risk that a broadcast overtakes sent JOINs */ |
399574d4 JM |
2783 | tsk->mc_method.rcast = true; |
2784 | tsk->mc_method.mandatory = true; | |
d12d2e12 | 2785 | tipc_group_join(net, grp, &tsk->sk.sk_rcvbuf); |
75da2163 JM |
2786 | return rc; |
2787 | } | |
2788 | ||
2789 | static int tipc_sk_leave(struct tipc_sock *tsk) | |
2790 | { | |
2791 | struct net *net = sock_net(&tsk->sk); | |
2792 | struct tipc_group *grp = tsk->group; | |
2793 | struct tipc_name_seq seq; | |
2794 | int scope; | |
2795 | ||
2796 | if (!grp) | |
2797 | return -EINVAL; | |
2798 | tipc_group_self(grp, &seq, &scope); | |
2799 | tipc_group_delete(net, grp); | |
2800 | tsk->group = NULL; | |
2801 | tipc_sk_withdraw(tsk, scope, &seq); | |
2802 | return 0; | |
2803 | } | |
2804 | ||
b97bf3fd | 2805 | /** |
247f0f3c | 2806 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2807 | * @sock: socket structure |
2808 | * @lvl: option level | |
2809 | * @opt: option identifier | |
2810 | * @ov: pointer to new option value | |
2811 | * @ol: length of option value | |
c4307285 YH |
2812 | * |
2813 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2814 | * (to ease compatibility). |
c4307285 | 2815 | * |
b97bf3fd PL |
2816 | * Returns 0 on success, errno otherwise |
2817 | */ | |
247f0f3c YX |
2818 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2819 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2820 | { |
0c3141e9 | 2821 | struct sock *sk = sock->sk; |
58ed9442 | 2822 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2823 | struct tipc_group_req mreq; |
01fd12bb | 2824 | u32 value = 0; |
a08ef476 | 2825 | int res = 0; |
b97bf3fd | 2826 | |
c4307285 YH |
2827 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2828 | return 0; | |
b97bf3fd PL |
2829 | if (lvl != SOL_TIPC) |
2830 | return -ENOPROTOOPT; | |
01fd12bb JPM |
2831 | |
2832 | switch (opt) { | |
2833 | case TIPC_IMPORTANCE: | |
2834 | case TIPC_SRC_DROPPABLE: | |
2835 | case TIPC_DEST_DROPPABLE: | |
2836 | case TIPC_CONN_TIMEOUT: | |
2837 | if (ol < sizeof(value)) | |
2838 | return -EINVAL; | |
75da2163 JM |
2839 | if (get_user(value, (u32 __user *)ov)) |
2840 | return -EFAULT; | |
2841 | break; | |
2842 | case TIPC_GROUP_JOIN: | |
2843 | if (ol < sizeof(mreq)) | |
2844 | return -EINVAL; | |
2845 | if (copy_from_user(&mreq, ov, sizeof(mreq))) | |
2846 | return -EFAULT; | |
01fd12bb JPM |
2847 | break; |
2848 | default: | |
2849 | if (ov || ol) | |
2850 | return -EINVAL; | |
2851 | } | |
b97bf3fd | 2852 | |
0c3141e9 | 2853 | lock_sock(sk); |
c4307285 | 2854 | |
b97bf3fd PL |
2855 | switch (opt) { |
2856 | case TIPC_IMPORTANCE: | |
301bae56 | 2857 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2858 | break; |
2859 | case TIPC_SRC_DROPPABLE: | |
2860 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2861 | tsk_set_unreliable(tsk, value); |
c4307285 | 2862 | else |
b97bf3fd PL |
2863 | res = -ENOPROTOOPT; |
2864 | break; | |
2865 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2866 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2867 | break; |
2868 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2869 | tipc_sk(sk)->conn_timeout = value; |
b97bf3fd | 2870 | break; |
01fd12bb JPM |
2871 | case TIPC_MCAST_BROADCAST: |
2872 | tsk->mc_method.rcast = false; | |
2873 | tsk->mc_method.mandatory = true; | |
2874 | break; | |
2875 | case TIPC_MCAST_REPLICAST: | |
2876 | tsk->mc_method.rcast = true; | |
2877 | tsk->mc_method.mandatory = true; | |
2878 | break; | |
75da2163 JM |
2879 | case TIPC_GROUP_JOIN: |
2880 | res = tipc_sk_join(tsk, &mreq); | |
2881 | break; | |
2882 | case TIPC_GROUP_LEAVE: | |
2883 | res = tipc_sk_leave(tsk); | |
2884 | break; | |
b97bf3fd PL |
2885 | default: |
2886 | res = -EINVAL; | |
2887 | } | |
2888 | ||
0c3141e9 AS |
2889 | release_sock(sk); |
2890 | ||
b97bf3fd PL |
2891 | return res; |
2892 | } | |
2893 | ||
2894 | /** | |
247f0f3c | 2895 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2896 | * @sock: socket structure |
2897 | * @lvl: option level | |
2898 | * @opt: option identifier | |
2899 | * @ov: receptacle for option value | |
2900 | * @ol: receptacle for length of option value | |
c4307285 YH |
2901 | * |
2902 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2903 | * (to ease compatibility). |
c4307285 | 2904 | * |
b97bf3fd PL |
2905 | * Returns 0 on success, errno otherwise |
2906 | */ | |
247f0f3c YX |
2907 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2908 | char __user *ov, int __user *ol) | |
b97bf3fd | 2909 | { |
0c3141e9 | 2910 | struct sock *sk = sock->sk; |
58ed9442 | 2911 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 JM |
2912 | struct tipc_name_seq seq; |
2913 | int len, scope; | |
b97bf3fd | 2914 | u32 value; |
c4307285 | 2915 | int res; |
b97bf3fd | 2916 | |
c4307285 YH |
2917 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2918 | return put_user(0, ol); | |
b97bf3fd PL |
2919 | if (lvl != SOL_TIPC) |
2920 | return -ENOPROTOOPT; | |
2db9983a AS |
2921 | res = get_user(len, ol); |
2922 | if (res) | |
c4307285 | 2923 | return res; |
b97bf3fd | 2924 | |
0c3141e9 | 2925 | lock_sock(sk); |
b97bf3fd PL |
2926 | |
2927 | switch (opt) { | |
2928 | case TIPC_IMPORTANCE: | |
301bae56 | 2929 | value = tsk_importance(tsk); |
b97bf3fd PL |
2930 | break; |
2931 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2932 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2933 | break; |
2934 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2935 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2936 | break; |
2937 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2938 | value = tsk->conn_timeout; |
0c3141e9 | 2939 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2940 | break; |
0e65967e | 2941 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2942 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2943 | break; |
0e65967e | 2944 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2945 | value = skb_queue_len(&sk->sk_receive_queue); |
2946 | break; | |
75da2163 JM |
2947 | case TIPC_GROUP_JOIN: |
2948 | seq.type = 0; | |
2949 | if (tsk->group) | |
2950 | tipc_group_self(tsk->group, &seq, &scope); | |
2951 | value = seq.type; | |
2952 | break; | |
b97bf3fd PL |
2953 | default: |
2954 | res = -EINVAL; | |
2955 | } | |
2956 | ||
0c3141e9 AS |
2957 | release_sock(sk); |
2958 | ||
25860c3b PG |
2959 | if (res) |
2960 | return res; /* "get" failed */ | |
b97bf3fd | 2961 | |
25860c3b PG |
2962 | if (len < sizeof(value)) |
2963 | return -EINVAL; | |
2964 | ||
2965 | if (copy_to_user(ov, &value, sizeof(value))) | |
2966 | return -EFAULT; | |
2967 | ||
2968 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2969 | } |
2970 | ||
f2f9800d | 2971 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2972 | { |
f2f9800d | 2973 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2974 | struct tipc_sioc_ln_req lnr; |
2975 | void __user *argp = (void __user *)arg; | |
2976 | ||
2977 | switch (cmd) { | |
2978 | case SIOCGETLINKNAME: | |
2979 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2980 | return -EFAULT; | |
f2f9800d YX |
2981 | if (!tipc_node_get_linkname(sock_net(sk), |
2982 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2983 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2984 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2985 | return -EFAULT; | |
2986 | return 0; | |
2987 | } | |
2988 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2989 | default: |
2990 | return -ENOIOCTLCMD; | |
2991 | } | |
2992 | } | |
2993 | ||
70b03759 EH |
2994 | static int tipc_socketpair(struct socket *sock1, struct socket *sock2) |
2995 | { | |
2996 | struct tipc_sock *tsk2 = tipc_sk(sock2->sk); | |
2997 | struct tipc_sock *tsk1 = tipc_sk(sock1->sk); | |
66bc1e8d EH |
2998 | u32 onode = tipc_own_addr(sock_net(sock1->sk)); |
2999 | ||
3000 | tsk1->peer.family = AF_TIPC; | |
3001 | tsk1->peer.addrtype = TIPC_ADDR_ID; | |
3002 | tsk1->peer.scope = TIPC_NODE_SCOPE; | |
3003 | tsk1->peer.addr.id.ref = tsk2->portid; | |
3004 | tsk1->peer.addr.id.node = onode; | |
3005 | tsk2->peer.family = AF_TIPC; | |
3006 | tsk2->peer.addrtype = TIPC_ADDR_ID; | |
3007 | tsk2->peer.scope = TIPC_NODE_SCOPE; | |
3008 | tsk2->peer.addr.id.ref = tsk1->portid; | |
3009 | tsk2->peer.addr.id.node = onode; | |
3010 | ||
3011 | tipc_sk_finish_conn(tsk1, tsk2->portid, onode); | |
3012 | tipc_sk_finish_conn(tsk2, tsk1->portid, onode); | |
70b03759 EH |
3013 | return 0; |
3014 | } | |
3015 | ||
ae86b9e3 BH |
3016 | /* Protocol switches for the various types of TIPC sockets */ |
3017 | ||
bca65eae | 3018 | static const struct proto_ops msg_ops = { |
0e65967e | 3019 | .owner = THIS_MODULE, |
b97bf3fd | 3020 | .family = AF_TIPC, |
247f0f3c YX |
3021 | .release = tipc_release, |
3022 | .bind = tipc_bind, | |
3023 | .connect = tipc_connect, | |
66bc1e8d | 3024 | .socketpair = tipc_socketpair, |
245f3d34 | 3025 | .accept = sock_no_accept, |
247f0f3c YX |
3026 | .getname = tipc_getname, |
3027 | .poll = tipc_poll, | |
78acb1f9 | 3028 | .ioctl = tipc_ioctl, |
245f3d34 | 3029 | .listen = sock_no_listen, |
247f0f3c YX |
3030 | .shutdown = tipc_shutdown, |
3031 | .setsockopt = tipc_setsockopt, | |
3032 | .getsockopt = tipc_getsockopt, | |
3033 | .sendmsg = tipc_sendmsg, | |
3034 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3035 | .mmap = sock_no_mmap, |
3036 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3037 | }; |
3038 | ||
bca65eae | 3039 | static const struct proto_ops packet_ops = { |
0e65967e | 3040 | .owner = THIS_MODULE, |
b97bf3fd | 3041 | .family = AF_TIPC, |
247f0f3c YX |
3042 | .release = tipc_release, |
3043 | .bind = tipc_bind, | |
3044 | .connect = tipc_connect, | |
70b03759 | 3045 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3046 | .accept = tipc_accept, |
3047 | .getname = tipc_getname, | |
3048 | .poll = tipc_poll, | |
78acb1f9 | 3049 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3050 | .listen = tipc_listen, |
3051 | .shutdown = tipc_shutdown, | |
3052 | .setsockopt = tipc_setsockopt, | |
3053 | .getsockopt = tipc_getsockopt, | |
3054 | .sendmsg = tipc_send_packet, | |
3055 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3056 | .mmap = sock_no_mmap, |
3057 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3058 | }; |
3059 | ||
bca65eae | 3060 | static const struct proto_ops stream_ops = { |
0e65967e | 3061 | .owner = THIS_MODULE, |
b97bf3fd | 3062 | .family = AF_TIPC, |
247f0f3c YX |
3063 | .release = tipc_release, |
3064 | .bind = tipc_bind, | |
3065 | .connect = tipc_connect, | |
70b03759 | 3066 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3067 | .accept = tipc_accept, |
3068 | .getname = tipc_getname, | |
3069 | .poll = tipc_poll, | |
78acb1f9 | 3070 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3071 | .listen = tipc_listen, |
3072 | .shutdown = tipc_shutdown, | |
3073 | .setsockopt = tipc_setsockopt, | |
3074 | .getsockopt = tipc_getsockopt, | |
365ad353 | 3075 | .sendmsg = tipc_sendstream, |
ec8a09fb | 3076 | .recvmsg = tipc_recvstream, |
8238745a YH |
3077 | .mmap = sock_no_mmap, |
3078 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3079 | }; |
3080 | ||
bca65eae | 3081 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 3082 | .owner = THIS_MODULE, |
b97bf3fd | 3083 | .family = AF_TIPC, |
c5fa7b3c | 3084 | .create = tipc_sk_create |
b97bf3fd PL |
3085 | }; |
3086 | ||
3087 | static struct proto tipc_proto = { | |
3088 | .name = "TIPC", | |
3089 | .owner = THIS_MODULE, | |
cc79dd1b YX |
3090 | .obj_size = sizeof(struct tipc_sock), |
3091 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
3092 | }; |
3093 | ||
3094 | /** | |
4323add6 | 3095 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 3096 | * |
b97bf3fd PL |
3097 | * Returns 0 on success, errno otherwise |
3098 | */ | |
4323add6 | 3099 | int tipc_socket_init(void) |
b97bf3fd PL |
3100 | { |
3101 | int res; | |
3102 | ||
c4307285 | 3103 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 3104 | if (res) { |
2cf8aa19 | 3105 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
3106 | goto out; |
3107 | } | |
3108 | ||
3109 | res = sock_register(&tipc_family_ops); | |
3110 | if (res) { | |
2cf8aa19 | 3111 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
3112 | proto_unregister(&tipc_proto); |
3113 | goto out; | |
3114 | } | |
b97bf3fd PL |
3115 | out: |
3116 | return res; | |
3117 | } | |
3118 | ||
3119 | /** | |
4323add6 | 3120 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 3121 | */ |
4323add6 | 3122 | void tipc_socket_stop(void) |
b97bf3fd | 3123 | { |
b97bf3fd PL |
3124 | sock_unregister(tipc_family_ops.family); |
3125 | proto_unregister(&tipc_proto); | |
3126 | } | |
34b78a12 RA |
3127 | |
3128 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 3129 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
3130 | { |
3131 | u32 peer_node; | |
3132 | u32 peer_port; | |
3133 | struct nlattr *nest; | |
3134 | ||
3135 | peer_node = tsk_peer_node(tsk); | |
3136 | peer_port = tsk_peer_port(tsk); | |
3137 | ||
3138 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
3139 | ||
3140 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
3141 | goto msg_full; | |
3142 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
3143 | goto msg_full; | |
3144 | ||
3145 | if (tsk->conn_type != 0) { | |
3146 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
3147 | goto msg_full; | |
3148 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
3149 | goto msg_full; | |
3150 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
3151 | goto msg_full; | |
3152 | } | |
3153 | nla_nest_end(skb, nest); | |
3154 | ||
3155 | return 0; | |
3156 | ||
3157 | msg_full: | |
3158 | nla_nest_cancel(skb, nest); | |
3159 | ||
3160 | return -EMSGSIZE; | |
3161 | } | |
3162 | ||
3163 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3164 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
3165 | struct tipc_sock *tsk) | |
34b78a12 RA |
3166 | { |
3167 | int err; | |
3168 | void *hdr; | |
3169 | struct nlattr *attrs; | |
34747539 YX |
3170 | struct net *net = sock_net(skb->sk); |
3171 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6fb7e9c | 3172 | struct sock *sk = &tsk->sk; |
34b78a12 RA |
3173 | |
3174 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3175 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
3176 | if (!hdr) |
3177 | goto msg_cancel; | |
3178 | ||
3179 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
3180 | if (!attrs) | |
3181 | goto genlmsg_cancel; | |
07f6c4bc | 3182 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 3183 | goto attr_msg_cancel; |
34747539 | 3184 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
3185 | goto attr_msg_cancel; |
3186 | ||
d6fb7e9c | 3187 | if (tipc_sk_connected(sk)) { |
34b78a12 RA |
3188 | err = __tipc_nl_add_sk_con(skb, tsk); |
3189 | if (err) | |
3190 | goto attr_msg_cancel; | |
3191 | } else if (!list_empty(&tsk->publications)) { | |
3192 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
3193 | goto attr_msg_cancel; | |
3194 | } | |
3195 | nla_nest_end(skb, attrs); | |
3196 | genlmsg_end(skb, hdr); | |
3197 | ||
3198 | return 0; | |
3199 | ||
3200 | attr_msg_cancel: | |
3201 | nla_nest_cancel(skb, attrs); | |
3202 | genlmsg_cancel: | |
3203 | genlmsg_cancel(skb, hdr); | |
3204 | msg_cancel: | |
3205 | return -EMSGSIZE; | |
3206 | } | |
3207 | ||
3208 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3209 | { | |
3210 | int err; | |
3211 | struct tipc_sock *tsk; | |
07f6c4bc YX |
3212 | const struct bucket_table *tbl; |
3213 | struct rhash_head *pos; | |
e05b31f4 YX |
3214 | struct net *net = sock_net(skb->sk); |
3215 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
3216 | u32 tbl_id = cb->args[0]; |
3217 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 3218 | |
07f6c4bc | 3219 | rcu_read_lock(); |
e05b31f4 | 3220 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
3221 | for (; tbl_id < tbl->size; tbl_id++) { |
3222 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 3223 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
3224 | if (prev_portid && prev_portid != tsk->portid) { |
3225 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
3226 | continue; | |
3227 | } | |
3228 | ||
07f6c4bc | 3229 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
3230 | if (err) { |
3231 | prev_portid = tsk->portid; | |
3232 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
3233 | goto out; | |
3234 | } | |
3235 | prev_portid = 0; | |
07f6c4bc | 3236 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 3237 | } |
34b78a12 | 3238 | } |
d6e164e3 | 3239 | out: |
07f6c4bc | 3240 | rcu_read_unlock(); |
d6e164e3 RA |
3241 | cb->args[0] = tbl_id; |
3242 | cb->args[1] = prev_portid; | |
34b78a12 RA |
3243 | |
3244 | return skb->len; | |
3245 | } | |
1a1a143d RA |
3246 | |
3247 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3248 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
3249 | struct netlink_callback *cb, | |
3250 | struct publication *publ) | |
1a1a143d RA |
3251 | { |
3252 | void *hdr; | |
3253 | struct nlattr *attrs; | |
3254 | ||
3255 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3256 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
3257 | if (!hdr) |
3258 | goto msg_cancel; | |
3259 | ||
3260 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
3261 | if (!attrs) | |
3262 | goto genlmsg_cancel; | |
3263 | ||
3264 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
3265 | goto attr_msg_cancel; | |
3266 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
3267 | goto attr_msg_cancel; | |
3268 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
3269 | goto attr_msg_cancel; | |
3270 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
3271 | goto attr_msg_cancel; | |
3272 | ||
3273 | nla_nest_end(skb, attrs); | |
3274 | genlmsg_end(skb, hdr); | |
3275 | ||
3276 | return 0; | |
3277 | ||
3278 | attr_msg_cancel: | |
3279 | nla_nest_cancel(skb, attrs); | |
3280 | genlmsg_cancel: | |
3281 | genlmsg_cancel(skb, hdr); | |
3282 | msg_cancel: | |
3283 | return -EMSGSIZE; | |
3284 | } | |
3285 | ||
3286 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3287 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
3288 | struct netlink_callback *cb, | |
3289 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
3290 | { |
3291 | int err; | |
3292 | struct publication *p; | |
3293 | ||
3294 | if (*last_publ) { | |
e50e73e1 | 3295 | list_for_each_entry(p, &tsk->publications, binding_sock) { |
1a1a143d RA |
3296 | if (p->key == *last_publ) |
3297 | break; | |
3298 | } | |
3299 | if (p->key != *last_publ) { | |
3300 | /* We never set seq or call nl_dump_check_consistent() | |
3301 | * this means that setting prev_seq here will cause the | |
3302 | * consistence check to fail in the netlink callback | |
3303 | * handler. Resulting in the last NLMSG_DONE message | |
3304 | * having the NLM_F_DUMP_INTR flag set. | |
3305 | */ | |
3306 | cb->prev_seq = 1; | |
3307 | *last_publ = 0; | |
3308 | return -EPIPE; | |
3309 | } | |
3310 | } else { | |
3311 | p = list_first_entry(&tsk->publications, struct publication, | |
e50e73e1 | 3312 | binding_sock); |
1a1a143d RA |
3313 | } |
3314 | ||
e50e73e1 | 3315 | list_for_each_entry_from(p, &tsk->publications, binding_sock) { |
1a1a143d RA |
3316 | err = __tipc_nl_add_sk_publ(skb, cb, p); |
3317 | if (err) { | |
3318 | *last_publ = p->key; | |
3319 | return err; | |
3320 | } | |
3321 | } | |
3322 | *last_publ = 0; | |
3323 | ||
3324 | return 0; | |
3325 | } | |
3326 | ||
3327 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3328 | { | |
3329 | int err; | |
07f6c4bc | 3330 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
3331 | u32 last_publ = cb->args[1]; |
3332 | u32 done = cb->args[2]; | |
e05b31f4 | 3333 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
3334 | struct tipc_sock *tsk; |
3335 | ||
07f6c4bc | 3336 | if (!tsk_portid) { |
1a1a143d RA |
3337 | struct nlattr **attrs; |
3338 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
3339 | ||
3340 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
3341 | if (err) | |
3342 | return err; | |
3343 | ||
45e093ae RA |
3344 | if (!attrs[TIPC_NLA_SOCK]) |
3345 | return -EINVAL; | |
3346 | ||
1a1a143d RA |
3347 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
3348 | attrs[TIPC_NLA_SOCK], | |
fceb6435 | 3349 | tipc_nl_sock_policy, NULL); |
1a1a143d RA |
3350 | if (err) |
3351 | return err; | |
3352 | ||
3353 | if (!sock[TIPC_NLA_SOCK_REF]) | |
3354 | return -EINVAL; | |
3355 | ||
07f6c4bc | 3356 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
3357 | } |
3358 | ||
3359 | if (done) | |
3360 | return 0; | |
3361 | ||
e05b31f4 | 3362 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
3363 | if (!tsk) |
3364 | return -EINVAL; | |
3365 | ||
3366 | lock_sock(&tsk->sk); | |
3367 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
3368 | if (!err) | |
3369 | done = 1; | |
3370 | release_sock(&tsk->sk); | |
07f6c4bc | 3371 | sock_put(&tsk->sk); |
1a1a143d | 3372 | |
07f6c4bc | 3373 | cb->args[0] = tsk_portid; |
1a1a143d RA |
3374 | cb->args[1] = last_publ; |
3375 | cb->args[2] = done; | |
3376 | ||
3377 | return skb->len; | |
3378 | } |