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 | 291 | struct sock *sk = &tsk->sk; |
23fd3eac | 292 | u32 self = tipc_own_addr(sock_net(sk)); |
301bae56 | 293 | u32 peer_port = tsk_peer_port(tsk); |
23fd3eac | 294 | u32 orig_node, peer_node; |
0fc87aae | 295 | |
d6fb7e9c | 296 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
297 | return false; |
298 | ||
299 | if (unlikely(msg_origport(msg) != peer_port)) | |
300 | return false; | |
301 | ||
302 | orig_node = msg_orignode(msg); | |
301bae56 | 303 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
304 | |
305 | if (likely(orig_node == peer_node)) | |
306 | return true; | |
307 | ||
23fd3eac | 308 | if (!orig_node && peer_node == self) |
0fc87aae JPM |
309 | return true; |
310 | ||
23fd3eac | 311 | if (!peer_node && orig_node == self) |
0fc87aae JPM |
312 | return true; |
313 | ||
314 | return false; | |
315 | } | |
316 | ||
0c288c86 PB |
317 | /* tipc_set_sk_state - set the sk_state of the socket |
318 | * @sk: socket | |
319 | * | |
320 | * Caller must hold socket lock | |
321 | * | |
322 | * Returns 0 on success, errno otherwise | |
323 | */ | |
324 | static int tipc_set_sk_state(struct sock *sk, int state) | |
325 | { | |
438adcaf | 326 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
327 | int res = -EINVAL; |
328 | ||
329 | switch (state) { | |
438adcaf PB |
330 | case TIPC_OPEN: |
331 | res = 0; | |
332 | break; | |
0c288c86 | 333 | case TIPC_LISTEN: |
99a20889 | 334 | case TIPC_CONNECTING: |
438adcaf | 335 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
336 | res = 0; |
337 | break; | |
8ea642ee | 338 | case TIPC_ESTABLISHED: |
99a20889 | 339 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 340 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
341 | res = 0; |
342 | break; | |
9fd4b070 | 343 | case TIPC_DISCONNECTING: |
99a20889 | 344 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
345 | oldsk_state == TIPC_ESTABLISHED) |
346 | res = 0; | |
347 | break; | |
0c288c86 PB |
348 | } |
349 | ||
350 | if (!res) | |
351 | sk->sk_state = state; | |
352 | ||
353 | return res; | |
354 | } | |
355 | ||
8c44e1af JPM |
356 | static int tipc_sk_sock_err(struct socket *sock, long *timeout) |
357 | { | |
358 | struct sock *sk = sock->sk; | |
359 | int err = sock_error(sk); | |
360 | int typ = sock->type; | |
361 | ||
362 | if (err) | |
363 | return err; | |
364 | if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { | |
365 | if (sk->sk_state == TIPC_DISCONNECTING) | |
366 | return -EPIPE; | |
367 | else if (!tipc_sk_connected(sk)) | |
368 | return -ENOTCONN; | |
369 | } | |
370 | if (!*timeout) | |
371 | return -EAGAIN; | |
372 | if (signal_pending(current)) | |
373 | return sock_intr_errno(*timeout); | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
844cf763 JPM |
378 | #define tipc_wait_for_cond(sock_, timeo_, condition_) \ |
379 | ({ \ | |
380 | struct sock *sk_; \ | |
381 | int rc_; \ | |
382 | \ | |
383 | while ((rc_ = !(condition_))) { \ | |
384 | DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ | |
385 | sk_ = (sock_)->sk; \ | |
386 | rc_ = tipc_sk_sock_err((sock_), timeo_); \ | |
387 | if (rc_) \ | |
388 | break; \ | |
389 | prepare_to_wait(sk_sleep(sk_), &wait_, TASK_INTERRUPTIBLE); \ | |
390 | release_sock(sk_); \ | |
391 | *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \ | |
392 | sched_annotate_sleep(); \ | |
393 | lock_sock(sk_); \ | |
394 | remove_wait_queue(sk_sleep(sk_), &wait_); \ | |
395 | } \ | |
396 | rc_; \ | |
8c44e1af JPM |
397 | }) |
398 | ||
b97bf3fd | 399 | /** |
c5fa7b3c | 400 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 401 | * @net: network namespace (must be default network) |
b97bf3fd PL |
402 | * @sock: pre-allocated socket structure |
403 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 404 | * @kern: caused by kernel or by userspace? |
c4307285 | 405 | * |
0c3141e9 AS |
406 | * This routine creates additional data structures used by the TIPC socket, |
407 | * initializes them, and links them together. | |
b97bf3fd PL |
408 | * |
409 | * Returns 0 on success, errno otherwise | |
410 | */ | |
58ed9442 JPM |
411 | static int tipc_sk_create(struct net *net, struct socket *sock, |
412 | int protocol, int kern) | |
b97bf3fd | 413 | { |
c5898636 | 414 | struct tipc_net *tn; |
0c3141e9 | 415 | const struct proto_ops *ops; |
b97bf3fd | 416 | struct sock *sk; |
58ed9442 | 417 | struct tipc_sock *tsk; |
5b8fa7ce | 418 | struct tipc_msg *msg; |
0c3141e9 AS |
419 | |
420 | /* Validate arguments */ | |
b97bf3fd PL |
421 | if (unlikely(protocol != 0)) |
422 | return -EPROTONOSUPPORT; | |
423 | ||
b97bf3fd PL |
424 | switch (sock->type) { |
425 | case SOCK_STREAM: | |
0c3141e9 | 426 | ops = &stream_ops; |
b97bf3fd PL |
427 | break; |
428 | case SOCK_SEQPACKET: | |
0c3141e9 | 429 | ops = &packet_ops; |
b97bf3fd PL |
430 | break; |
431 | case SOCK_DGRAM: | |
b97bf3fd | 432 | case SOCK_RDM: |
0c3141e9 | 433 | ops = &msg_ops; |
b97bf3fd | 434 | break; |
49978651 | 435 | default: |
49978651 | 436 | return -EPROTOTYPE; |
b97bf3fd PL |
437 | } |
438 | ||
0c3141e9 | 439 | /* Allocate socket's protocol area */ |
11aa9c28 | 440 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 441 | if (sk == NULL) |
b97bf3fd | 442 | return -ENOMEM; |
b97bf3fd | 443 | |
58ed9442 | 444 | tsk = tipc_sk(sk); |
301bae56 | 445 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 | 446 | INIT_LIST_HEAD(&tsk->publications); |
365ad353 | 447 | INIT_LIST_HEAD(&tsk->cong_links); |
301bae56 | 448 | msg = &tsk->phdr; |
c5898636 | 449 | tn = net_generic(sock_net(sk), tipc_net_id); |
b97bf3fd | 450 | |
0c3141e9 | 451 | /* Finish initializing socket data structures */ |
0c3141e9 | 452 | sock->ops = ops; |
0c3141e9 | 453 | sock_init_data(sock, sk); |
438adcaf | 454 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 455 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 456 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
457 | return -EINVAL; |
458 | } | |
40f9f439 HX |
459 | |
460 | /* Ensure tsk is visible before we read own_addr. */ | |
461 | smp_mb(); | |
462 | ||
23fd3eac JM |
463 | tipc_msg_init(tipc_own_addr(net), msg, TIPC_LOW_IMPORTANCE, |
464 | TIPC_NAMED_MSG, NAMED_H_SIZE, 0); | |
40f9f439 | 465 | |
07f6c4bc | 466 | msg_set_origport(msg, tsk->portid); |
31b102bb | 467 | timer_setup(&sk->sk_timer, tipc_sk_timeout, 0); |
6f00089c | 468 | sk->sk_shutdown = 0; |
64ac5f59 | 469 | sk->sk_backlog_rcv = tipc_sk_backlog_rcv; |
cc79dd1b | 470 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
471 | sk->sk_data_ready = tipc_data_ready; |
472 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 473 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc | 474 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
1b22bcad | 475 | tsk->group_is_open = true; |
4f4482dc | 476 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 477 | |
10724cc7 JPM |
478 | /* Start out with safe limits until we receive an advertised window */ |
479 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
480 | tsk->rcv_win = tsk->snd_win; | |
481 | ||
c752023a | 482 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 483 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 484 | if (sock->type == SOCK_DGRAM) |
301bae56 | 485 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 486 | } |
438adcaf | 487 | |
b97bf3fd PL |
488 | return 0; |
489 | } | |
490 | ||
07f6c4bc YX |
491 | static void tipc_sk_callback(struct rcu_head *head) |
492 | { | |
493 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
494 | ||
495 | sock_put(&tsk->sk); | |
496 | } | |
497 | ||
6f00089c PB |
498 | /* Caller should hold socket lock for the socket. */ |
499 | static void __tipc_shutdown(struct socket *sock, int error) | |
500 | { | |
501 | struct sock *sk = sock->sk; | |
502 | struct tipc_sock *tsk = tipc_sk(sk); | |
503 | struct net *net = sock_net(sk); | |
365ad353 | 504 | long timeout = CONN_TIMEOUT_DEFAULT; |
6f00089c PB |
505 | u32 dnode = tsk_peer_node(tsk); |
506 | struct sk_buff *skb; | |
507 | ||
365ad353 JPM |
508 | /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */ |
509 | tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && | |
510 | !tsk_conn_cong(tsk))); | |
511 | ||
6f00089c PB |
512 | /* Reject all unreceived messages, except on an active connection |
513 | * (which disconnects locally & sends a 'FIN+' to peer). | |
514 | */ | |
515 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
516 | if (TIPC_SKB_CB(skb)->bytes_read) { | |
517 | kfree_skb(skb); | |
693c5649 | 518 | continue; |
6f00089c | 519 | } |
693c5649 JPM |
520 | if (!tipc_sk_type_connectionless(sk) && |
521 | sk->sk_state != TIPC_DISCONNECTING) { | |
522 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
523 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
524 | } | |
525 | tipc_sk_respond(sk, skb, error); | |
6f00089c | 526 | } |
693c5649 JPM |
527 | |
528 | if (tipc_sk_type_connectionless(sk)) | |
529 | return; | |
530 | ||
6f00089c PB |
531 | if (sk->sk_state != TIPC_DISCONNECTING) { |
532 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
533 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
534 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
535 | tsk->portid, error); | |
536 | if (skb) | |
537 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
693c5649 JPM |
538 | tipc_node_remove_conn(net, dnode, tsk->portid); |
539 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
6f00089c PB |
540 | } |
541 | } | |
542 | ||
b97bf3fd | 543 | /** |
247f0f3c | 544 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
545 | * @sock: socket to destroy |
546 | * | |
547 | * This routine cleans up any messages that are still queued on the socket. | |
548 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
549 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
550 | * and any others are discarded. (If the first message on a STREAM socket | |
551 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 552 | * |
b97bf3fd PL |
553 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
554 | * are returned or discarded according to the "destination droppable" setting | |
555 | * specified for the message by the sender. | |
556 | * | |
557 | * Returns 0 on success, errno otherwise | |
558 | */ | |
247f0f3c | 559 | static int tipc_release(struct socket *sock) |
b97bf3fd | 560 | { |
b97bf3fd | 561 | struct sock *sk = sock->sk; |
58ed9442 | 562 | struct tipc_sock *tsk; |
b97bf3fd | 563 | |
0c3141e9 AS |
564 | /* |
565 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
566 | * releases a pre-allocated child socket that was never used) | |
567 | */ | |
0c3141e9 | 568 | if (sk == NULL) |
b97bf3fd | 569 | return 0; |
c4307285 | 570 | |
58ed9442 | 571 | tsk = tipc_sk(sk); |
0c3141e9 AS |
572 | lock_sock(sk); |
573 | ||
6f00089c PB |
574 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
575 | sk->sk_shutdown = SHUTDOWN_MASK; | |
75da2163 | 576 | tipc_sk_leave(tsk); |
301bae56 | 577 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 578 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 579 | tipc_sk_remove(tsk); |
b97bf3fd | 580 | |
0c3141e9 | 581 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 582 | release_sock(sk); |
a80ae530 | 583 | tipc_dest_list_purge(&tsk->cong_links); |
365ad353 | 584 | tsk->cong_link_cnt = 0; |
07f6c4bc | 585 | call_rcu(&tsk->rcu, tipc_sk_callback); |
0c3141e9 | 586 | sock->sk = NULL; |
b97bf3fd | 587 | |
065d7e39 | 588 | return 0; |
b97bf3fd PL |
589 | } |
590 | ||
591 | /** | |
247f0f3c | 592 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
593 | * @sock: socket structure |
594 | * @uaddr: socket address describing name(s) and desired operation | |
595 | * @uaddr_len: size of socket address data structure | |
c4307285 | 596 | * |
b97bf3fd PL |
597 | * Name and name sequence binding is indicated using a positive scope value; |
598 | * a negative scope value unbinds the specified name. Specifying no name | |
599 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 600 | * |
b97bf3fd | 601 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
602 | * |
603 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
604 | * access any non-constant socket information. | |
b97bf3fd | 605 | */ |
247f0f3c YX |
606 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
607 | int uaddr_len) | |
b97bf3fd | 608 | { |
84602761 | 609 | struct sock *sk = sock->sk; |
b97bf3fd | 610 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 611 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 612 | int res = -EINVAL; |
b97bf3fd | 613 | |
84602761 YX |
614 | lock_sock(sk); |
615 | if (unlikely(!uaddr_len)) { | |
301bae56 | 616 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
617 | goto exit; |
618 | } | |
75da2163 JM |
619 | if (tsk->group) { |
620 | res = -EACCES; | |
621 | goto exit; | |
622 | } | |
84602761 YX |
623 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
624 | res = -EINVAL; | |
625 | goto exit; | |
626 | } | |
627 | if (addr->family != AF_TIPC) { | |
628 | res = -EAFNOSUPPORT; | |
629 | goto exit; | |
630 | } | |
b97bf3fd | 631 | |
b97bf3fd PL |
632 | if (addr->addrtype == TIPC_ADDR_NAME) |
633 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
634 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
635 | res = -EAFNOSUPPORT; | |
636 | goto exit; | |
637 | } | |
c4307285 | 638 | |
13a2e898 | 639 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 640 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
641 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
642 | res = -EACCES; | |
643 | goto exit; | |
644 | } | |
c422f1bd | 645 | |
928df188 | 646 | res = (addr->scope >= 0) ? |
301bae56 JPM |
647 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
648 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
649 | exit: |
650 | release_sock(sk); | |
651 | return res; | |
b97bf3fd PL |
652 | } |
653 | ||
c4307285 | 654 | /** |
247f0f3c | 655 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
656 | * @sock: socket structure |
657 | * @uaddr: area for returned socket address | |
658 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 659 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 660 | * |
b97bf3fd | 661 | * Returns 0 on success, errno otherwise |
0c3141e9 | 662 | * |
2da59918 AS |
663 | * NOTE: This routine doesn't need to take the socket lock since it only |
664 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 665 | * a completely predictable manner). |
b97bf3fd | 666 | */ |
247f0f3c | 667 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
9b2c45d4 | 668 | int peer) |
b97bf3fd | 669 | { |
b97bf3fd | 670 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
671 | struct sock *sk = sock->sk; |
672 | struct tipc_sock *tsk = tipc_sk(sk); | |
b97bf3fd | 673 | |
88f8a5e3 | 674 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 675 | if (peer) { |
f40acbaf | 676 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 677 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 678 | return -ENOTCONN; |
301bae56 JPM |
679 | addr->addr.id.ref = tsk_peer_port(tsk); |
680 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 681 | } else { |
07f6c4bc | 682 | addr->addr.id.ref = tsk->portid; |
23fd3eac | 683 | addr->addr.id.node = tipc_own_addr(sock_net(sk)); |
0c3141e9 | 684 | } |
b97bf3fd | 685 | |
b97bf3fd PL |
686 | addr->addrtype = TIPC_ADDR_ID; |
687 | addr->family = AF_TIPC; | |
688 | addr->scope = 0; | |
b97bf3fd PL |
689 | addr->addr.name.domain = 0; |
690 | ||
9b2c45d4 | 691 | return sizeof(*addr); |
b97bf3fd PL |
692 | } |
693 | ||
694 | /** | |
247f0f3c | 695 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
696 | * @file: file structure associated with the socket |
697 | * @sock: socket for which to calculate the poll bits | |
698 | * @wait: ??? | |
699 | * | |
9b674e82 AS |
700 | * Returns pollmask value |
701 | * | |
702 | * COMMENTARY: | |
703 | * It appears that the usual socket locking mechanisms are not useful here | |
704 | * since the pollmask info is potentially out-of-date the moment this routine | |
705 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
706 | * to handle any preventable race conditions, so TIPC will do the same ... | |
707 | * | |
f662c070 AS |
708 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
709 | * imply that the operation will succeed, merely that it should be performed | |
710 | * and will not block. | |
b97bf3fd | 711 | */ |
ade994f4 | 712 | static __poll_t tipc_poll(struct file *file, struct socket *sock, |
247f0f3c | 713 | poll_table *wait) |
b97bf3fd | 714 | { |
9b674e82 | 715 | struct sock *sk = sock->sk; |
58ed9442 | 716 | struct tipc_sock *tsk = tipc_sk(sk); |
ade994f4 | 717 | __poll_t revents = 0; |
9b674e82 | 718 | |
f288bef4 | 719 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 720 | |
6f00089c | 721 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
a9a08845 | 722 | revents |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM; |
6f00089c | 723 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
a9a08845 | 724 | revents |= EPOLLHUP; |
6f00089c | 725 | |
f40acbaf PB |
726 | switch (sk->sk_state) { |
727 | case TIPC_ESTABLISHED: | |
517d7c79 | 728 | case TIPC_CONNECTING: |
365ad353 | 729 | if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk)) |
a9a08845 | 730 | revents |= EPOLLOUT; |
f40acbaf PB |
731 | /* fall thru' */ |
732 | case TIPC_LISTEN: | |
cb4dc41e | 733 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
a9a08845 | 734 | revents |= EPOLLIN | EPOLLRDNORM; |
f40acbaf PB |
735 | break; |
736 | case TIPC_OPEN: | |
60c25306 | 737 | if (tsk->group_is_open && !tsk->cong_link_cnt) |
a9a08845 | 738 | revents |= EPOLLOUT; |
ae236fb2 JM |
739 | if (!tipc_sk_type_connectionless(sk)) |
740 | break; | |
cb4dc41e | 741 | if (skb_queue_empty(&sk->sk_receive_queue)) |
ae236fb2 | 742 | break; |
a9a08845 | 743 | revents |= EPOLLIN | EPOLLRDNORM; |
f40acbaf PB |
744 | break; |
745 | case TIPC_DISCONNECTING: | |
a9a08845 | 746 | revents = EPOLLIN | EPOLLRDNORM | EPOLLHUP; |
f40acbaf | 747 | break; |
f662c070 | 748 | } |
ae236fb2 | 749 | return revents; |
b97bf3fd PL |
750 | } |
751 | ||
0abd8ff2 JPM |
752 | /** |
753 | * tipc_sendmcast - send multicast message | |
754 | * @sock: socket structure | |
755 | * @seq: destination address | |
562640f3 | 756 | * @msg: message to send |
365ad353 JPM |
757 | * @dlen: length of data to send |
758 | * @timeout: timeout to wait for wakeup | |
0abd8ff2 JPM |
759 | * |
760 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
761 | * Returns the number of bytes sent on success, or errno | |
762 | */ | |
763 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
365ad353 | 764 | struct msghdr *msg, size_t dlen, long timeout) |
0abd8ff2 JPM |
765 | { |
766 | struct sock *sk = sock->sk; | |
c5898636 | 767 | struct tipc_sock *tsk = tipc_sk(sk); |
365ad353 | 768 | struct tipc_msg *hdr = &tsk->phdr; |
f2f9800d | 769 | struct net *net = sock_net(sk); |
365ad353 | 770 | int mtu = tipc_bcast_get_mtu(net); |
01fd12bb | 771 | struct tipc_mc_method *method = &tsk->mc_method; |
365ad353 | 772 | struct sk_buff_head pkts; |
a853e4c6 | 773 | struct tipc_nlist dsts; |
0abd8ff2 JPM |
774 | int rc; |
775 | ||
75da2163 JM |
776 | if (tsk->group) |
777 | return -EACCES; | |
778 | ||
a853e4c6 | 779 | /* Block or return if any destination link is congested */ |
365ad353 JPM |
780 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); |
781 | if (unlikely(rc)) | |
782 | return rc; | |
f214fc40 | 783 | |
a853e4c6 JPM |
784 | /* Lookup destination nodes */ |
785 | tipc_nlist_init(&dsts, tipc_own_addr(net)); | |
786 | tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower, | |
e9a03445 | 787 | seq->upper, &dsts); |
a853e4c6 JPM |
788 | if (!dsts.local && !dsts.remote) |
789 | return -EHOSTUNREACH; | |
790 | ||
791 | /* Build message header */ | |
365ad353 | 792 | msg_set_type(hdr, TIPC_MCAST_MSG); |
a853e4c6 | 793 | msg_set_hdr_sz(hdr, MCAST_H_SIZE); |
365ad353 JPM |
794 | msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); |
795 | msg_set_destport(hdr, 0); | |
796 | msg_set_destnode(hdr, 0); | |
797 | msg_set_nametype(hdr, seq->type); | |
798 | msg_set_namelower(hdr, seq->lower); | |
799 | msg_set_nameupper(hdr, seq->upper); | |
365ad353 | 800 | |
a853e4c6 | 801 | /* Build message as chain of buffers */ |
365ad353 JPM |
802 | skb_queue_head_init(&pkts); |
803 | rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); | |
0abd8ff2 | 804 | |
a853e4c6 JPM |
805 | /* Send message if build was successful */ |
806 | if (unlikely(rc == dlen)) | |
01fd12bb | 807 | rc = tipc_mcast_xmit(net, &pkts, method, &dsts, |
a853e4c6 JPM |
808 | &tsk->cong_link_cnt); |
809 | ||
810 | tipc_nlist_purge(&dsts); | |
365ad353 JPM |
811 | |
812 | return rc ? rc : dlen; | |
0abd8ff2 JPM |
813 | } |
814 | ||
27bd9ec0 JM |
815 | /** |
816 | * tipc_send_group_msg - send a message to a member in the group | |
817 | * @net: network namespace | |
818 | * @m: message to send | |
819 | * @mb: group member | |
820 | * @dnode: destination node | |
821 | * @dport: destination port | |
822 | * @dlen: total length of message data | |
823 | */ | |
824 | static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk, | |
825 | struct msghdr *m, struct tipc_member *mb, | |
826 | u32 dnode, u32 dport, int dlen) | |
827 | { | |
b87a5ea3 | 828 | u16 bc_snd_nxt = tipc_group_bc_snd_nxt(tsk->group); |
2f487712 | 829 | struct tipc_mc_method *method = &tsk->mc_method; |
27bd9ec0 JM |
830 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); |
831 | struct tipc_msg *hdr = &tsk->phdr; | |
832 | struct sk_buff_head pkts; | |
833 | int mtu, rc; | |
834 | ||
835 | /* Complete message header */ | |
836 | msg_set_type(hdr, TIPC_GRP_UCAST_MSG); | |
837 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); | |
838 | msg_set_destport(hdr, dport); | |
839 | msg_set_destnode(hdr, dnode); | |
b87a5ea3 | 840 | msg_set_grp_bc_seqno(hdr, bc_snd_nxt); |
27bd9ec0 JM |
841 | |
842 | /* Build message as chain of buffers */ | |
843 | skb_queue_head_init(&pkts); | |
844 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); | |
845 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); | |
846 | if (unlikely(rc != dlen)) | |
847 | return rc; | |
848 | ||
849 | /* Send message */ | |
850 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
851 | if (unlikely(rc == -ELINKCONG)) { | |
852 | tipc_dest_push(&tsk->cong_links, dnode, 0); | |
853 | tsk->cong_link_cnt++; | |
854 | } | |
855 | ||
2f487712 | 856 | /* Update send window */ |
27bd9ec0 JM |
857 | tipc_group_update_member(mb, blks); |
858 | ||
2f487712 JM |
859 | /* A broadcast sent within next EXPIRE period must follow same path */ |
860 | method->rcast = true; | |
861 | method->mandatory = true; | |
27bd9ec0 JM |
862 | return dlen; |
863 | } | |
864 | ||
865 | /** | |
866 | * tipc_send_group_unicast - send message to a member in the group | |
867 | * @sock: socket structure | |
868 | * @m: message to send | |
869 | * @dlen: total length of message data | |
870 | * @timeout: timeout to wait for wakeup | |
871 | * | |
872 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
873 | * Returns the number of bytes sent on success, or errno | |
874 | */ | |
875 | static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m, | |
876 | int dlen, long timeout) | |
877 | { | |
878 | struct sock *sk = sock->sk; | |
879 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
880 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
881 | struct tipc_sock *tsk = tipc_sk(sk); | |
882 | struct tipc_group *grp = tsk->group; | |
883 | struct net *net = sock_net(sk); | |
884 | struct tipc_member *mb = NULL; | |
885 | u32 node, port; | |
886 | int rc; | |
887 | ||
888 | node = dest->addr.id.node; | |
889 | port = dest->addr.id.ref; | |
890 | if (!port && !node) | |
891 | return -EHOSTUNREACH; | |
892 | ||
893 | /* Block or return if destination link or member is congested */ | |
894 | rc = tipc_wait_for_cond(sock, &timeout, | |
895 | !tipc_dest_find(&tsk->cong_links, node, 0) && | |
896 | !tipc_group_cong(grp, node, port, blks, &mb)); | |
897 | if (unlikely(rc)) | |
898 | return rc; | |
899 | ||
900 | if (unlikely(!mb)) | |
901 | return -EHOSTUNREACH; | |
902 | ||
903 | rc = tipc_send_group_msg(net, tsk, m, mb, node, port, dlen); | |
904 | ||
905 | return rc ? rc : dlen; | |
906 | } | |
907 | ||
ee106d7f JM |
908 | /** |
909 | * tipc_send_group_anycast - send message to any member with given identity | |
910 | * @sock: socket structure | |
911 | * @m: message to send | |
912 | * @dlen: total length of message data | |
913 | * @timeout: timeout to wait for wakeup | |
914 | * | |
915 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
916 | * Returns the number of bytes sent on success, or errno | |
917 | */ | |
918 | static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m, | |
919 | int dlen, long timeout) | |
920 | { | |
921 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
922 | struct sock *sk = sock->sk; | |
923 | struct tipc_sock *tsk = tipc_sk(sk); | |
924 | struct list_head *cong_links = &tsk->cong_links; | |
925 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
926 | struct tipc_group *grp = tsk->group; | |
232d07b7 | 927 | struct tipc_msg *hdr = &tsk->phdr; |
ee106d7f JM |
928 | struct tipc_member *first = NULL; |
929 | struct tipc_member *mbr = NULL; | |
930 | struct net *net = sock_net(sk); | |
931 | u32 node, port, exclude; | |
ee106d7f | 932 | struct list_head dsts; |
232d07b7 | 933 | u32 type, inst, scope; |
ee106d7f JM |
934 | int lookups = 0; |
935 | int dstcnt, rc; | |
936 | bool cong; | |
937 | ||
938 | INIT_LIST_HEAD(&dsts); | |
939 | ||
232d07b7 | 940 | type = msg_nametype(hdr); |
ee106d7f | 941 | inst = dest->addr.name.name.instance; |
232d07b7 | 942 | scope = msg_lookup_scope(hdr); |
ee106d7f JM |
943 | exclude = tipc_group_exclude(grp); |
944 | ||
945 | while (++lookups < 4) { | |
946 | first = NULL; | |
947 | ||
948 | /* Look for a non-congested destination member, if any */ | |
949 | while (1) { | |
232d07b7 | 950 | if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts, |
ee106d7f JM |
951 | &dstcnt, exclude, false)) |
952 | return -EHOSTUNREACH; | |
953 | tipc_dest_pop(&dsts, &node, &port); | |
954 | cong = tipc_group_cong(grp, node, port, blks, &mbr); | |
955 | if (!cong) | |
956 | break; | |
957 | if (mbr == first) | |
958 | break; | |
959 | if (!first) | |
960 | first = mbr; | |
961 | } | |
962 | ||
963 | /* Start over if destination was not in member list */ | |
964 | if (unlikely(!mbr)) | |
965 | continue; | |
966 | ||
967 | if (likely(!cong && !tipc_dest_find(cong_links, node, 0))) | |
968 | break; | |
969 | ||
970 | /* Block or return if destination link or member is congested */ | |
971 | rc = tipc_wait_for_cond(sock, &timeout, | |
972 | !tipc_dest_find(cong_links, node, 0) && | |
973 | !tipc_group_cong(grp, node, port, | |
974 | blks, &mbr)); | |
975 | if (unlikely(rc)) | |
976 | return rc; | |
977 | ||
978 | /* Send, unless destination disappeared while waiting */ | |
979 | if (likely(mbr)) | |
980 | break; | |
981 | } | |
982 | ||
983 | if (unlikely(lookups >= 4)) | |
984 | return -EHOSTUNREACH; | |
985 | ||
986 | rc = tipc_send_group_msg(net, tsk, m, mbr, node, port, dlen); | |
987 | ||
988 | return rc ? rc : dlen; | |
989 | } | |
990 | ||
75da2163 JM |
991 | /** |
992 | * tipc_send_group_bcast - send message to all members in communication group | |
993 | * @sk: socket structure | |
994 | * @m: message to send | |
995 | * @dlen: total length of message data | |
996 | * @timeout: timeout to wait for wakeup | |
997 | * | |
998 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
999 | * Returns the number of bytes sent on success, or errno | |
1000 | */ | |
1001 | static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m, | |
1002 | int dlen, long timeout) | |
1003 | { | |
5b8dddb6 | 1004 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
75da2163 JM |
1005 | struct sock *sk = sock->sk; |
1006 | struct net *net = sock_net(sk); | |
1007 | struct tipc_sock *tsk = tipc_sk(sk); | |
1008 | struct tipc_group *grp = tsk->group; | |
1009 | struct tipc_nlist *dsts = tipc_group_dests(grp); | |
1010 | struct tipc_mc_method *method = &tsk->mc_method; | |
2f487712 | 1011 | bool ack = method->mandatory && method->rcast; |
b7d42635 | 1012 | int blks = tsk_blocks(MCAST_H_SIZE + dlen); |
75da2163 JM |
1013 | struct tipc_msg *hdr = &tsk->phdr; |
1014 | int mtu = tipc_bcast_get_mtu(net); | |
1015 | struct sk_buff_head pkts; | |
1016 | int rc = -EHOSTUNREACH; | |
1017 | ||
1018 | if (!dsts->local && !dsts->remote) | |
1019 | return -EHOSTUNREACH; | |
1020 | ||
b7d42635 JM |
1021 | /* Block or return if any destination link or member is congested */ |
1022 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt && | |
1023 | !tipc_group_bc_cong(grp, blks)); | |
75da2163 JM |
1024 | if (unlikely(rc)) |
1025 | return rc; | |
1026 | ||
1027 | /* Complete message header */ | |
5b8dddb6 JM |
1028 | if (dest) { |
1029 | msg_set_type(hdr, TIPC_GRP_MCAST_MSG); | |
1030 | msg_set_nameinst(hdr, dest->addr.name.name.instance); | |
1031 | } else { | |
1032 | msg_set_type(hdr, TIPC_GRP_BCAST_MSG); | |
1033 | msg_set_nameinst(hdr, 0); | |
1034 | } | |
b7d42635 | 1035 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); |
75da2163 JM |
1036 | msg_set_destport(hdr, 0); |
1037 | msg_set_destnode(hdr, 0); | |
75da2163 JM |
1038 | msg_set_grp_bc_seqno(hdr, tipc_group_bc_snd_nxt(grp)); |
1039 | ||
2f487712 JM |
1040 | /* Avoid getting stuck with repeated forced replicasts */ |
1041 | msg_set_grp_bc_ack_req(hdr, ack); | |
1042 | ||
75da2163 JM |
1043 | /* Build message as chain of buffers */ |
1044 | skb_queue_head_init(&pkts); | |
1045 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); | |
1046 | if (unlikely(rc != dlen)) | |
1047 | return rc; | |
1048 | ||
1049 | /* Send message */ | |
2f487712 | 1050 | rc = tipc_mcast_xmit(net, &pkts, method, dsts, &tsk->cong_link_cnt); |
75da2163 JM |
1051 | if (unlikely(rc)) |
1052 | return rc; | |
1053 | ||
b7d42635 | 1054 | /* Update broadcast sequence number and send windows */ |
2f487712 JM |
1055 | tipc_group_update_bc_members(tsk->group, blks, ack); |
1056 | ||
1057 | /* Broadcast link is now free to choose method for next broadcast */ | |
1058 | method->mandatory = false; | |
1059 | method->expires = jiffies; | |
1060 | ||
75da2163 JM |
1061 | return dlen; |
1062 | } | |
1063 | ||
5b8dddb6 JM |
1064 | /** |
1065 | * tipc_send_group_mcast - send message to all members with given identity | |
1066 | * @sock: socket structure | |
1067 | * @m: message to send | |
1068 | * @dlen: total length of message data | |
1069 | * @timeout: timeout to wait for wakeup | |
1070 | * | |
1071 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
1072 | * Returns the number of bytes sent on success, or errno | |
1073 | */ | |
1074 | static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m, | |
1075 | int dlen, long timeout) | |
1076 | { | |
1077 | struct sock *sk = sock->sk; | |
1078 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
5b8dddb6 JM |
1079 | struct tipc_sock *tsk = tipc_sk(sk); |
1080 | struct tipc_group *grp = tsk->group; | |
232d07b7 | 1081 | struct tipc_msg *hdr = &tsk->phdr; |
5b8dddb6 | 1082 | struct net *net = sock_net(sk); |
232d07b7 | 1083 | u32 type, inst, scope, exclude; |
5b8dddb6 | 1084 | struct list_head dsts; |
232d07b7 | 1085 | u32 dstcnt; |
5b8dddb6 JM |
1086 | |
1087 | INIT_LIST_HEAD(&dsts); | |
1088 | ||
232d07b7 JM |
1089 | type = msg_nametype(hdr); |
1090 | inst = dest->addr.name.name.instance; | |
1091 | scope = msg_lookup_scope(hdr); | |
5b8dddb6 | 1092 | exclude = tipc_group_exclude(grp); |
232d07b7 JM |
1093 | |
1094 | if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts, | |
1095 | &dstcnt, exclude, true)) | |
5b8dddb6 JM |
1096 | return -EHOSTUNREACH; |
1097 | ||
1098 | if (dstcnt == 1) { | |
1099 | tipc_dest_pop(&dsts, &dest->addr.id.node, &dest->addr.id.ref); | |
1100 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
1101 | } | |
1102 | ||
1103 | tipc_dest_list_purge(&dsts); | |
1104 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
1105 | } | |
1106 | ||
cb1b7280 JPM |
1107 | /** |
1108 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
1109 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
1110 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
1111 | * | |
1112 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 1113 | */ |
cb1b7280 JPM |
1114 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
1115 | struct sk_buff_head *inputq) | |
078bec82 | 1116 | { |
75da2163 | 1117 | u32 self = tipc_own_addr(net); |
232d07b7 | 1118 | u32 type, lower, upper, scope; |
cb1b7280 | 1119 | struct sk_buff *skb, *_skb; |
75da2163 | 1120 | u32 portid, oport, onode; |
232d07b7 | 1121 | struct sk_buff_head tmpq; |
75da2163 | 1122 | struct list_head dports; |
232d07b7 JM |
1123 | struct tipc_msg *hdr; |
1124 | int user, mtyp, hlen; | |
1125 | bool exact; | |
3c724acd | 1126 | |
cb1b7280 | 1127 | __skb_queue_head_init(&tmpq); |
4d8642d8 | 1128 | INIT_LIST_HEAD(&dports); |
078bec82 | 1129 | |
cb1b7280 JPM |
1130 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
1131 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
232d07b7 JM |
1132 | hdr = buf_msg(skb); |
1133 | user = msg_user(hdr); | |
1134 | mtyp = msg_type(hdr); | |
1135 | hlen = skb_headroom(skb) + msg_hdr_sz(hdr); | |
1136 | oport = msg_origport(hdr); | |
1137 | onode = msg_orignode(hdr); | |
1138 | type = msg_nametype(hdr); | |
1139 | ||
2f487712 JM |
1140 | if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) { |
1141 | spin_lock_bh(&inputq->lock); | |
1142 | if (skb_peek(arrvq) == skb) { | |
1143 | __skb_dequeue(arrvq); | |
1144 | __skb_queue_tail(inputq, skb); | |
1145 | } | |
c545a945 | 1146 | kfree_skb(skb); |
2f487712 JM |
1147 | spin_unlock_bh(&inputq->lock); |
1148 | continue; | |
1149 | } | |
232d07b7 JM |
1150 | |
1151 | /* Group messages require exact scope match */ | |
1152 | if (msg_in_group(hdr)) { | |
1153 | lower = 0; | |
1154 | upper = ~0; | |
1155 | scope = msg_lookup_scope(hdr); | |
1156 | exact = true; | |
1157 | } else { | |
1158 | /* TIPC_NODE_SCOPE means "any scope" in this context */ | |
1159 | if (onode == self) | |
1160 | scope = TIPC_NODE_SCOPE; | |
1161 | else | |
1162 | scope = TIPC_CLUSTER_SCOPE; | |
1163 | exact = false; | |
1164 | lower = msg_namelower(hdr); | |
1165 | upper = msg_nameupper(hdr); | |
75da2163 | 1166 | } |
232d07b7 JM |
1167 | |
1168 | /* Create destination port list: */ | |
1169 | tipc_nametbl_mc_lookup(net, type, lower, upper, | |
1170 | scope, exact, &dports); | |
1171 | ||
1172 | /* Clone message per destination */ | |
a80ae530 | 1173 | while (tipc_dest_pop(&dports, NULL, &portid)) { |
232d07b7 | 1174 | _skb = __pskb_copy(skb, hlen, GFP_ATOMIC); |
cb1b7280 JPM |
1175 | if (_skb) { |
1176 | msg_set_destport(buf_msg(_skb), portid); | |
1177 | __skb_queue_tail(&tmpq, _skb); | |
1178 | continue; | |
1179 | } | |
1180 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 1181 | } |
cb1b7280 JPM |
1182 | /* Append to inputq if not already done by other thread */ |
1183 | spin_lock_bh(&inputq->lock); | |
1184 | if (skb_peek(arrvq) == skb) { | |
1185 | skb_queue_splice_tail_init(&tmpq, inputq); | |
1186 | kfree_skb(__skb_dequeue(arrvq)); | |
1187 | } | |
1188 | spin_unlock_bh(&inputq->lock); | |
1189 | __skb_queue_purge(&tmpq); | |
1190 | kfree_skb(skb); | |
078bec82 | 1191 | } |
cb1b7280 | 1192 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
1193 | } |
1194 | ||
ac0074ee | 1195 | /** |
64ac5f59 | 1196 | * tipc_sk_conn_proto_rcv - receive a connection mng protocol message |
ac0074ee | 1197 | * @tsk: receiving socket |
bcd3ffd4 | 1198 | * @skb: pointer to message buffer. |
ac0074ee | 1199 | */ |
64ac5f59 JM |
1200 | static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
1201 | struct sk_buff_head *xmitq) | |
ac0074ee | 1202 | { |
bcd3ffd4 | 1203 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
1204 | u32 onode = tsk_own_node(tsk); |
1205 | struct sock *sk = &tsk->sk; | |
bcd3ffd4 | 1206 | int mtyp = msg_type(hdr); |
10724cc7 | 1207 | bool conn_cong; |
bcd3ffd4 | 1208 | |
ac0074ee | 1209 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 1210 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
1211 | goto exit; |
1212 | ||
c1be7756 PB |
1213 | if (unlikely(msg_errcode(hdr))) { |
1214 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1215 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
1216 | tsk_peer_port(tsk)); | |
1217 | sk->sk_state_change(sk); | |
1218 | goto exit; | |
1219 | } | |
1220 | ||
8ea642ee | 1221 | tsk->probe_unacked = false; |
ac0074ee | 1222 | |
bcd3ffd4 JPM |
1223 | if (mtyp == CONN_PROBE) { |
1224 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
1225 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
1226 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
1227 | return; |
1228 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 1229 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
1230 | tsk->snt_unacked -= msg_conn_ack(hdr); |
1231 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
1232 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 1233 | if (conn_cong) |
bcd3ffd4 JPM |
1234 | sk->sk_write_space(sk); |
1235 | } else if (mtyp != CONN_PROBE_REPLY) { | |
1236 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 1237 | } |
ac0074ee | 1238 | exit: |
bcd3ffd4 | 1239 | kfree_skb(skb); |
ac0074ee JPM |
1240 | } |
1241 | ||
b97bf3fd | 1242 | /** |
247f0f3c | 1243 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
1244 | * @sock: socket structure |
1245 | * @m: message to send | |
e2dafe87 | 1246 | * @dsz: amount of user data to be sent |
c4307285 | 1247 | * |
b97bf3fd | 1248 | * Message must have an destination specified explicitly. |
c4307285 | 1249 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
1250 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
1251 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 1252 | * |
b97bf3fd PL |
1253 | * Returns the number of bytes sent on success, or errno otherwise |
1254 | */ | |
1b784140 | 1255 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 1256 | struct msghdr *m, size_t dsz) |
39a0295f YX |
1257 | { |
1258 | struct sock *sk = sock->sk; | |
1259 | int ret; | |
1260 | ||
1261 | lock_sock(sk); | |
1262 | ret = __tipc_sendmsg(sock, m, dsz); | |
1263 | release_sock(sk); | |
1264 | ||
1265 | return ret; | |
1266 | } | |
1267 | ||
365ad353 | 1268 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1269 | { |
0c3141e9 | 1270 | struct sock *sk = sock->sk; |
f2f9800d | 1271 | struct net *net = sock_net(sk); |
365ad353 JPM |
1272 | struct tipc_sock *tsk = tipc_sk(sk); |
1273 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
1274 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); | |
1275 | struct list_head *clinks = &tsk->cong_links; | |
1276 | bool syn = !tipc_sk_type_connectionless(sk); | |
75da2163 | 1277 | struct tipc_group *grp = tsk->group; |
365ad353 | 1278 | struct tipc_msg *hdr = &tsk->phdr; |
f2f8036e | 1279 | struct tipc_name_seq *seq; |
365ad353 | 1280 | struct sk_buff_head pkts; |
365ad353 | 1281 | u32 dnode, dport; |
928df188 | 1282 | u32 type, inst; |
365ad353 | 1283 | int mtu, rc; |
b97bf3fd | 1284 | |
365ad353 | 1285 | if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE)) |
c29c3f70 | 1286 | return -EMSGSIZE; |
365ad353 | 1287 | |
27bd9ec0 JM |
1288 | if (likely(dest)) { |
1289 | if (unlikely(m->msg_namelen < sizeof(*dest))) | |
1290 | return -EINVAL; | |
1291 | if (unlikely(dest->family != AF_TIPC)) | |
1292 | return -EINVAL; | |
1293 | } | |
1294 | ||
1295 | if (grp) { | |
1296 | if (!dest) | |
1297 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
ee106d7f JM |
1298 | if (dest->addrtype == TIPC_ADDR_NAME) |
1299 | return tipc_send_group_anycast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1300 | if (dest->addrtype == TIPC_ADDR_ID) |
1301 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
5b8dddb6 JM |
1302 | if (dest->addrtype == TIPC_ADDR_MCAST) |
1303 | return tipc_send_group_mcast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1304 | return -EINVAL; |
1305 | } | |
75da2163 | 1306 | |
f2f8036e | 1307 | if (unlikely(!dest)) { |
365ad353 JPM |
1308 | dest = &tsk->peer; |
1309 | if (!syn || dest->family != AF_TIPC) | |
f2f8036e | 1310 | return -EDESTADDRREQ; |
f2f8036e | 1311 | } |
365ad353 | 1312 | |
365ad353 | 1313 | if (unlikely(syn)) { |
0c288c86 | 1314 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 1315 | return -EPIPE; |
438adcaf | 1316 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
1317 | return -EISCONN; |
1318 | if (tsk->published) | |
1319 | return -EOPNOTSUPP; | |
3388007b | 1320 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
1321 | tsk->conn_type = dest->addr.name.name.type; |
1322 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 1323 | } |
b97bf3fd | 1324 | } |
e2dafe87 | 1325 | |
365ad353 JPM |
1326 | seq = &dest->addr.nameseq; |
1327 | if (dest->addrtype == TIPC_ADDR_MCAST) | |
1328 | return tipc_sendmcast(sock, seq, m, dlen, timeout); | |
e2dafe87 | 1329 | |
365ad353 JPM |
1330 | if (dest->addrtype == TIPC_ADDR_NAME) { |
1331 | type = dest->addr.name.name.type; | |
1332 | inst = dest->addr.name.name.instance; | |
928df188 | 1333 | dnode = dest->addr.name.domain; |
365ad353 JPM |
1334 | msg_set_type(hdr, TIPC_NAMED_MSG); |
1335 | msg_set_hdr_sz(hdr, NAMED_H_SIZE); | |
1336 | msg_set_nametype(hdr, type); | |
1337 | msg_set_nameinst(hdr, inst); | |
928df188 | 1338 | msg_set_lookup_scope(hdr, tipc_node2scope(dnode)); |
4ac1c8d0 | 1339 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
365ad353 JPM |
1340 | msg_set_destnode(hdr, dnode); |
1341 | msg_set_destport(hdr, dport); | |
39a0295f YX |
1342 | if (unlikely(!dport && !dnode)) |
1343 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
1344 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
1345 | dnode = dest->addr.id.node; | |
365ad353 JPM |
1346 | msg_set_type(hdr, TIPC_DIRECT_MSG); |
1347 | msg_set_lookup_scope(hdr, 0); | |
1348 | msg_set_destnode(hdr, dnode); | |
1349 | msg_set_destport(hdr, dest->addr.id.ref); | |
1350 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); | |
e2dafe87 JPM |
1351 | } |
1352 | ||
365ad353 | 1353 | /* Block or return if destination link is congested */ |
a80ae530 JM |
1354 | rc = tipc_wait_for_cond(sock, &timeout, |
1355 | !tipc_dest_find(clinks, dnode, 0)); | |
365ad353 JPM |
1356 | if (unlikely(rc)) |
1357 | return rc; | |
1358 | ||
1359 | skb_queue_head_init(&pkts); | |
f2f9800d | 1360 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
365ad353 JPM |
1361 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
1362 | if (unlikely(rc != dlen)) | |
39a0295f | 1363 | return rc; |
e2dafe87 | 1364 | |
365ad353 JPM |
1365 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); |
1366 | if (unlikely(rc == -ELINKCONG)) { | |
a80ae530 | 1367 | tipc_dest_push(clinks, dnode, 0); |
365ad353 JPM |
1368 | tsk->cong_link_cnt++; |
1369 | rc = 0; | |
1370 | } | |
e2dafe87 | 1371 | |
365ad353 JPM |
1372 | if (unlikely(syn && !rc)) |
1373 | tipc_set_sk_state(sk, TIPC_CONNECTING); | |
1374 | ||
1375 | return rc ? rc : dlen; | |
b97bf3fd PL |
1376 | } |
1377 | ||
c4307285 | 1378 | /** |
365ad353 | 1379 | * tipc_sendstream - send stream-oriented data |
b97bf3fd | 1380 | * @sock: socket structure |
4ccfe5e0 JPM |
1381 | * @m: data to send |
1382 | * @dsz: total length of data to be transmitted | |
c4307285 | 1383 | * |
4ccfe5e0 | 1384 | * Used for SOCK_STREAM data. |
c4307285 | 1385 | * |
4ccfe5e0 JPM |
1386 | * Returns the number of bytes sent on success (or partial success), |
1387 | * or errno if no data sent | |
b97bf3fd | 1388 | */ |
365ad353 | 1389 | static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1390 | { |
1391 | struct sock *sk = sock->sk; | |
1392 | int ret; | |
1393 | ||
1394 | lock_sock(sk); | |
365ad353 | 1395 | ret = __tipc_sendstream(sock, m, dsz); |
39a0295f YX |
1396 | release_sock(sk); |
1397 | ||
1398 | return ret; | |
1399 | } | |
1400 | ||
365ad353 | 1401 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1402 | { |
0c3141e9 | 1403 | struct sock *sk = sock->sk; |
342dfc30 | 1404 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
365ad353 JPM |
1405 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
1406 | struct tipc_sock *tsk = tipc_sk(sk); | |
1407 | struct tipc_msg *hdr = &tsk->phdr; | |
1408 | struct net *net = sock_net(sk); | |
1409 | struct sk_buff_head pkts; | |
1410 | u32 dnode = tsk_peer_node(tsk); | |
1411 | int send, sent = 0; | |
1412 | int rc = 0; | |
1d835874 | 1413 | |
365ad353 | 1414 | skb_queue_head_init(&pkts); |
7cf87fa2 | 1415 | |
365ad353 JPM |
1416 | if (unlikely(dlen > INT_MAX)) |
1417 | return -EMSGSIZE; | |
4ccfe5e0 | 1418 | |
365ad353 JPM |
1419 | /* Handle implicit connection setup */ |
1420 | if (unlikely(dest)) { | |
1421 | rc = __tipc_sendmsg(sock, m, dlen); | |
1422 | if (dlen && (dlen == rc)) | |
1423 | tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); | |
39a0295f | 1424 | return rc; |
365ad353 | 1425 | } |
f214fc40 | 1426 | |
c4307285 | 1427 | do { |
365ad353 JPM |
1428 | rc = tipc_wait_for_cond(sock, &timeout, |
1429 | (!tsk->cong_link_cnt && | |
8c44e1af JPM |
1430 | !tsk_conn_cong(tsk) && |
1431 | tipc_sk_connected(sk))); | |
365ad353 JPM |
1432 | if (unlikely(rc)) |
1433 | break; | |
1434 | ||
1435 | send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE); | |
1436 | rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts); | |
1437 | if (unlikely(rc != send)) | |
1438 | break; | |
1439 | ||
1440 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
1441 | if (unlikely(rc == -ELINKCONG)) { | |
1442 | tsk->cong_link_cnt = 1; | |
1443 | rc = 0; | |
1444 | } | |
1445 | if (likely(!rc)) { | |
1446 | tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE); | |
1447 | sent += send; | |
1448 | } | |
1449 | } while (sent < dlen && !rc); | |
39a0295f | 1450 | |
3364d61c | 1451 | return sent ? sent : rc; |
b97bf3fd PL |
1452 | } |
1453 | ||
c4307285 | 1454 | /** |
4ccfe5e0 | 1455 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1456 | * @sock: socket structure |
4ccfe5e0 JPM |
1457 | * @m: message to send |
1458 | * @dsz: length of data to be transmitted | |
c4307285 | 1459 | * |
4ccfe5e0 | 1460 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1461 | * |
4ccfe5e0 | 1462 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1463 | */ |
1b784140 | 1464 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1465 | { |
4ccfe5e0 JPM |
1466 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1467 | return -EMSGSIZE; | |
b97bf3fd | 1468 | |
365ad353 | 1469 | return tipc_sendstream(sock, m, dsz); |
b97bf3fd PL |
1470 | } |
1471 | ||
dadebc00 | 1472 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1473 | */ |
301bae56 | 1474 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1475 | u32 peer_node) |
b97bf3fd | 1476 | { |
3721e9c7 YX |
1477 | struct sock *sk = &tsk->sk; |
1478 | struct net *net = sock_net(sk); | |
301bae56 | 1479 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1480 | |
dadebc00 JPM |
1481 | msg_set_destnode(msg, peer_node); |
1482 | msg_set_destport(msg, peer_port); | |
1483 | msg_set_type(msg, TIPC_CONN_MSG); | |
1484 | msg_set_lookup_scope(msg, 0); | |
1485 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1486 | |
0d5fcebf | 1487 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
8ea642ee | 1488 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d YX |
1489 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1490 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1491 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1492 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1493 | return; | |
1494 | ||
1495 | /* Fall back to message based flow control */ | |
1496 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1497 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1498 | } |
1499 | ||
1500 | /** | |
31c82a2d | 1501 | * tipc_sk_set_orig_addr - capture sender's address for received message |
b97bf3fd | 1502 | * @m: descriptor for message info |
31c82a2d | 1503 | * @hdr: received message header |
c4307285 | 1504 | * |
b97bf3fd PL |
1505 | * Note: Address is not captured if not requested by receiver. |
1506 | */ | |
31c82a2d | 1507 | static void tipc_sk_set_orig_addr(struct msghdr *m, struct sk_buff *skb) |
b97bf3fd | 1508 | { |
31c82a2d JM |
1509 | DECLARE_SOCKADDR(struct sockaddr_pair *, srcaddr, m->msg_name); |
1510 | struct tipc_msg *hdr = buf_msg(skb); | |
1511 | ||
1512 | if (!srcaddr) | |
1513 | return; | |
1514 | ||
1515 | srcaddr->sock.family = AF_TIPC; | |
1516 | srcaddr->sock.addrtype = TIPC_ADDR_ID; | |
1517 | srcaddr->sock.addr.id.ref = msg_origport(hdr); | |
1518 | srcaddr->sock.addr.id.node = msg_orignode(hdr); | |
1519 | srcaddr->sock.addr.name.domain = 0; | |
1520 | srcaddr->sock.scope = 0; | |
1521 | m->msg_namelen = sizeof(struct sockaddr_tipc); | |
1522 | ||
1523 | if (!msg_in_group(hdr)) | |
1524 | return; | |
1525 | ||
1526 | /* Group message users may also want to know sending member's id */ | |
1527 | srcaddr->member.family = AF_TIPC; | |
1528 | srcaddr->member.addrtype = TIPC_ADDR_NAME; | |
1529 | srcaddr->member.addr.name.name.type = msg_nametype(hdr); | |
1530 | srcaddr->member.addr.name.name.instance = TIPC_SKB_CB(skb)->orig_member; | |
1531 | srcaddr->member.addr.name.domain = 0; | |
1532 | m->msg_namelen = sizeof(*srcaddr); | |
b97bf3fd PL |
1533 | } |
1534 | ||
1535 | /** | |
301bae56 | 1536 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1537 | * @m: descriptor for message info |
1538 | * @msg: received message header | |
301bae56 | 1539 | * @tsk: TIPC port associated with message |
c4307285 | 1540 | * |
b97bf3fd | 1541 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1542 | * |
b97bf3fd PL |
1543 | * Returns 0 if successful, otherwise errno |
1544 | */ | |
301bae56 JPM |
1545 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1546 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1547 | { |
1548 | u32 anc_data[3]; | |
1549 | u32 err; | |
1550 | u32 dest_type; | |
3546c750 | 1551 | int has_name; |
b97bf3fd PL |
1552 | int res; |
1553 | ||
1554 | if (likely(m->msg_controllen == 0)) | |
1555 | return 0; | |
1556 | ||
1557 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1558 | err = msg ? msg_errcode(msg) : 0; |
1559 | if (unlikely(err)) { | |
1560 | anc_data[0] = err; | |
1561 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1562 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1563 | if (res) | |
b97bf3fd | 1564 | return res; |
2db9983a AS |
1565 | if (anc_data[1]) { |
1566 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1567 | msg_data(msg)); | |
1568 | if (res) | |
1569 | return res; | |
1570 | } | |
b97bf3fd PL |
1571 | } |
1572 | ||
1573 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1574 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1575 | switch (dest_type) { | |
1576 | case TIPC_NAMED_MSG: | |
3546c750 | 1577 | has_name = 1; |
b97bf3fd PL |
1578 | anc_data[0] = msg_nametype(msg); |
1579 | anc_data[1] = msg_namelower(msg); | |
1580 | anc_data[2] = msg_namelower(msg); | |
1581 | break; | |
1582 | case TIPC_MCAST_MSG: | |
3546c750 | 1583 | has_name = 1; |
b97bf3fd PL |
1584 | anc_data[0] = msg_nametype(msg); |
1585 | anc_data[1] = msg_namelower(msg); | |
1586 | anc_data[2] = msg_nameupper(msg); | |
1587 | break; | |
1588 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1589 | has_name = (tsk->conn_type != 0); |
1590 | anc_data[0] = tsk->conn_type; | |
1591 | anc_data[1] = tsk->conn_instance; | |
1592 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1593 | break; |
1594 | default: | |
3546c750 | 1595 | has_name = 0; |
b97bf3fd | 1596 | } |
2db9983a AS |
1597 | if (has_name) { |
1598 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1599 | if (res) | |
1600 | return res; | |
1601 | } | |
b97bf3fd PL |
1602 | |
1603 | return 0; | |
1604 | } | |
1605 | ||
10724cc7 | 1606 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1607 | { |
d6fb7e9c PB |
1608 | struct sock *sk = &tsk->sk; |
1609 | struct net *net = sock_net(sk); | |
a6ca1094 | 1610 | struct sk_buff *skb = NULL; |
739f5e4e | 1611 | struct tipc_msg *msg; |
301bae56 JPM |
1612 | u32 peer_port = tsk_peer_port(tsk); |
1613 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1614 | |
d6fb7e9c | 1615 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1616 | return; |
c5898636 JPM |
1617 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1618 | dnode, tsk_own_node(tsk), peer_port, | |
1619 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1620 | if (!skb) |
739f5e4e | 1621 | return; |
a6ca1094 | 1622 | msg = buf_msg(skb); |
10724cc7 JPM |
1623 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1624 | tsk->rcv_unacked = 0; | |
1625 | ||
1626 | /* Adjust to and advertize the correct window limit */ | |
1627 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1628 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1629 | msg_set_adv_win(msg, tsk->rcv_win); | |
1630 | } | |
af9b028e | 1631 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1632 | } |
1633 | ||
85d3fc94 | 1634 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1635 | { |
1636 | struct sock *sk = sock->sk; | |
1637 | DEFINE_WAIT(wait); | |
85d3fc94 | 1638 | long timeo = *timeop; |
4e0df495 PB |
1639 | int err = sock_error(sk); |
1640 | ||
1641 | if (err) | |
1642 | return err; | |
9bbb4ecc YX |
1643 | |
1644 | for (;;) { | |
1645 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1646 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1647 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1648 | err = -ENOTCONN; |
1649 | break; | |
1650 | } | |
1651 | release_sock(sk); | |
1652 | timeo = schedule_timeout(timeo); | |
1653 | lock_sock(sk); | |
1654 | } | |
1655 | err = 0; | |
1656 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1657 | break; | |
9bbb4ecc YX |
1658 | err = -EAGAIN; |
1659 | if (!timeo) | |
1660 | break; | |
143fe22f EH |
1661 | err = sock_intr_errno(timeo); |
1662 | if (signal_pending(current)) | |
1663 | break; | |
4e0df495 PB |
1664 | |
1665 | err = sock_error(sk); | |
1666 | if (err) | |
1667 | break; | |
9bbb4ecc YX |
1668 | } |
1669 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1670 | *timeop = timeo; |
9bbb4ecc YX |
1671 | return err; |
1672 | } | |
1673 | ||
c4307285 | 1674 | /** |
247f0f3c | 1675 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd | 1676 | * @m: descriptor for message info |
e9f8b101 | 1677 | * @buflen: length of user buffer area |
b97bf3fd | 1678 | * @flags: receive flags |
c4307285 | 1679 | * |
b97bf3fd PL |
1680 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1681 | * If the complete message doesn't fit in user area, truncate it. | |
1682 | * | |
1683 | * Returns size of returned message data, errno otherwise | |
1684 | */ | |
e9f8b101 JPM |
1685 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, |
1686 | size_t buflen, int flags) | |
b97bf3fd | 1687 | { |
0c3141e9 | 1688 | struct sock *sk = sock->sk; |
e9f8b101 | 1689 | bool connected = !tipc_sk_type_connectionless(sk); |
ae236fb2 | 1690 | struct tipc_sock *tsk = tipc_sk(sk); |
e9f8b101 | 1691 | int rc, err, hlen, dlen, copy; |
b7d42635 | 1692 | struct sk_buff_head xmitq; |
ae236fb2 JM |
1693 | struct tipc_msg *hdr; |
1694 | struct sk_buff *skb; | |
1695 | bool grp_evt; | |
e9f8b101 | 1696 | long timeout; |
b97bf3fd | 1697 | |
0c3141e9 | 1698 | /* Catch invalid receive requests */ |
e9f8b101 | 1699 | if (unlikely(!buflen)) |
b97bf3fd PL |
1700 | return -EINVAL; |
1701 | ||
0c3141e9 | 1702 | lock_sock(sk); |
e9f8b101 JPM |
1703 | if (unlikely(connected && sk->sk_state == TIPC_OPEN)) { |
1704 | rc = -ENOTCONN; | |
b97bf3fd PL |
1705 | goto exit; |
1706 | } | |
e9f8b101 | 1707 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1708 | |
b7d42635 | 1709 | /* Step rcv queue to first msg with data or error; wait if necessary */ |
e9f8b101 | 1710 | do { |
e9f8b101 JPM |
1711 | rc = tipc_wait_for_rcvmsg(sock, &timeout); |
1712 | if (unlikely(rc)) | |
1713 | goto exit; | |
1714 | skb = skb_peek(&sk->sk_receive_queue); | |
1715 | hdr = buf_msg(skb); | |
1716 | dlen = msg_data_sz(hdr); | |
1717 | hlen = msg_hdr_sz(hdr); | |
1718 | err = msg_errcode(hdr); | |
ae236fb2 | 1719 | grp_evt = msg_is_grp_evt(hdr); |
e9f8b101 JPM |
1720 | if (likely(dlen || err)) |
1721 | break; | |
2e84c60b | 1722 | tsk_advance_rx_queue(sk); |
e9f8b101 | 1723 | } while (1); |
b97bf3fd | 1724 | |
e9f8b101 | 1725 | /* Collect msg meta data, including error code and rejected data */ |
31c82a2d | 1726 | tipc_sk_set_orig_addr(m, skb); |
e9f8b101 JPM |
1727 | rc = tipc_sk_anc_data_recv(m, hdr, tsk); |
1728 | if (unlikely(rc)) | |
b97bf3fd PL |
1729 | goto exit; |
1730 | ||
e9f8b101 JPM |
1731 | /* Capture data if non-error msg, otherwise just set return value */ |
1732 | if (likely(!err)) { | |
1733 | copy = min_t(int, dlen, buflen); | |
1734 | if (unlikely(copy != dlen)) | |
b97bf3fd | 1735 | m->msg_flags |= MSG_TRUNC; |
e9f8b101 | 1736 | rc = skb_copy_datagram_msg(skb, hlen, m, copy); |
b97bf3fd | 1737 | } else { |
e9f8b101 JPM |
1738 | copy = 0; |
1739 | rc = 0; | |
1740 | if (err != TIPC_CONN_SHUTDOWN && connected && !m->msg_control) | |
1741 | rc = -ECONNRESET; | |
b97bf3fd | 1742 | } |
e9f8b101 JPM |
1743 | if (unlikely(rc)) |
1744 | goto exit; | |
b97bf3fd | 1745 | |
ae236fb2 JM |
1746 | /* Mark message as group event if applicable */ |
1747 | if (unlikely(grp_evt)) { | |
1748 | if (msg_grp_evt(hdr) == TIPC_WITHDRAWN) | |
1749 | m->msg_flags |= MSG_EOR; | |
1750 | m->msg_flags |= MSG_OOB; | |
1751 | copy = 0; | |
1752 | } | |
1753 | ||
e9f8b101 | 1754 | /* Caption of data or error code/rejected data was successful */ |
10724cc7 JPM |
1755 | if (unlikely(flags & MSG_PEEK)) |
1756 | goto exit; | |
1757 | ||
b7d42635 JM |
1758 | /* Send group flow control advertisement when applicable */ |
1759 | if (tsk->group && msg_in_group(hdr) && !grp_evt) { | |
1760 | skb_queue_head_init(&xmitq); | |
1761 | tipc_group_update_rcv_win(tsk->group, tsk_blocks(hlen + dlen), | |
1762 | msg_orignode(hdr), msg_origport(hdr), | |
1763 | &xmitq); | |
1764 | tipc_node_distr_xmit(sock_net(sk), &xmitq); | |
1765 | } | |
1766 | ||
10724cc7 | 1767 | tsk_advance_rx_queue(sk); |
ae236fb2 | 1768 | |
e9f8b101 JPM |
1769 | if (likely(!connected)) |
1770 | goto exit; | |
1771 | ||
b7d42635 | 1772 | /* Send connection flow control advertisement when applicable */ |
e9f8b101 JPM |
1773 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); |
1774 | if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE) | |
1775 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1776 | exit: |
0c3141e9 | 1777 | release_sock(sk); |
e9f8b101 | 1778 | return rc ? rc : copy; |
b97bf3fd PL |
1779 | } |
1780 | ||
c4307285 | 1781 | /** |
ec8a09fb | 1782 | * tipc_recvstream - receive stream-oriented data |
b97bf3fd | 1783 | * @m: descriptor for message info |
ec8a09fb | 1784 | * @buflen: total size of user buffer area |
b97bf3fd | 1785 | * @flags: receive flags |
c4307285 YH |
1786 | * |
1787 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1788 | * will optionally wait for more; never truncates data. |
1789 | * | |
1790 | * Returns size of returned message data, errno otherwise | |
1791 | */ | |
ec8a09fb JPM |
1792 | static int tipc_recvstream(struct socket *sock, struct msghdr *m, |
1793 | size_t buflen, int flags) | |
b97bf3fd | 1794 | { |
0c3141e9 | 1795 | struct sock *sk = sock->sk; |
58ed9442 | 1796 | struct tipc_sock *tsk = tipc_sk(sk); |
ec8a09fb JPM |
1797 | struct sk_buff *skb; |
1798 | struct tipc_msg *hdr; | |
1799 | struct tipc_skb_cb *skb_cb; | |
1800 | bool peek = flags & MSG_PEEK; | |
1801 | int offset, required, copy, copied = 0; | |
1802 | int hlen, dlen, err, rc; | |
1803 | long timeout; | |
b97bf3fd | 1804 | |
0c3141e9 | 1805 | /* Catch invalid receive attempts */ |
ec8a09fb | 1806 | if (unlikely(!buflen)) |
b97bf3fd PL |
1807 | return -EINVAL; |
1808 | ||
0c3141e9 | 1809 | lock_sock(sk); |
b97bf3fd | 1810 | |
438adcaf | 1811 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
ec8a09fb | 1812 | rc = -ENOTCONN; |
9bbb4ecc | 1813 | goto exit; |
b97bf3fd | 1814 | } |
ec8a09fb JPM |
1815 | required = sock_rcvlowat(sk, flags & MSG_WAITALL, buflen); |
1816 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
b97bf3fd | 1817 | |
ec8a09fb JPM |
1818 | do { |
1819 | /* Look at first msg in receive queue; wait if necessary */ | |
1820 | rc = tipc_wait_for_rcvmsg(sock, &timeout); | |
1821 | if (unlikely(rc)) | |
1822 | break; | |
1823 | skb = skb_peek(&sk->sk_receive_queue); | |
1824 | skb_cb = TIPC_SKB_CB(skb); | |
1825 | hdr = buf_msg(skb); | |
1826 | dlen = msg_data_sz(hdr); | |
1827 | hlen = msg_hdr_sz(hdr); | |
1828 | err = msg_errcode(hdr); | |
0232fd0a | 1829 | |
ec8a09fb JPM |
1830 | /* Discard any empty non-errored (SYN-) message */ |
1831 | if (unlikely(!dlen && !err)) { | |
1832 | tsk_advance_rx_queue(sk); | |
1833 | continue; | |
1834 | } | |
0232fd0a | 1835 | |
ec8a09fb JPM |
1836 | /* Collect msg meta data, incl. error code and rejected data */ |
1837 | if (!copied) { | |
31c82a2d | 1838 | tipc_sk_set_orig_addr(m, skb); |
ec8a09fb JPM |
1839 | rc = tipc_sk_anc_data_recv(m, hdr, tsk); |
1840 | if (rc) | |
1841 | break; | |
1842 | } | |
b97bf3fd | 1843 | |
ec8a09fb JPM |
1844 | /* Copy data if msg ok, otherwise return error/partial data */ |
1845 | if (likely(!err)) { | |
1846 | offset = skb_cb->bytes_read; | |
1847 | copy = min_t(int, dlen - offset, buflen - copied); | |
1848 | rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy); | |
1849 | if (unlikely(rc)) | |
1850 | break; | |
1851 | copied += copy; | |
1852 | offset += copy; | |
1853 | if (unlikely(offset < dlen)) { | |
1854 | if (!peek) | |
1855 | skb_cb->bytes_read = offset; | |
1856 | break; | |
1857 | } | |
1858 | } else { | |
1859 | rc = 0; | |
1860 | if ((err != TIPC_CONN_SHUTDOWN) && !m->msg_control) | |
1861 | rc = -ECONNRESET; | |
1862 | if (copied || rc) | |
1863 | break; | |
b97bf3fd | 1864 | } |
b97bf3fd | 1865 | |
ec8a09fb JPM |
1866 | if (unlikely(peek)) |
1867 | break; | |
b97bf3fd | 1868 | |
ec8a09fb | 1869 | tsk_advance_rx_queue(sk); |
10724cc7 | 1870 | |
ec8a09fb JPM |
1871 | /* Send connection flow control advertisement when applicable */ |
1872 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); | |
1873 | if (unlikely(tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE)) | |
1874 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1875 | |
ec8a09fb JPM |
1876 | /* Exit if all requested data or FIN/error received */ |
1877 | if (copied == buflen || err) | |
1878 | break; | |
b97bf3fd | 1879 | |
ec8a09fb | 1880 | } while (!skb_queue_empty(&sk->sk_receive_queue) || copied < required); |
b97bf3fd | 1881 | exit: |
0c3141e9 | 1882 | release_sock(sk); |
ec8a09fb | 1883 | return copied ? copied : rc; |
b97bf3fd PL |
1884 | } |
1885 | ||
f288bef4 YX |
1886 | /** |
1887 | * tipc_write_space - wake up thread if port congestion is released | |
1888 | * @sk: socket | |
1889 | */ | |
1890 | static void tipc_write_space(struct sock *sk) | |
1891 | { | |
1892 | struct socket_wq *wq; | |
1893 | ||
1894 | rcu_read_lock(); | |
1895 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1896 | if (skwq_has_sleeper(wq)) |
a9a08845 LT |
1897 | wake_up_interruptible_sync_poll(&wq->wait, EPOLLOUT | |
1898 | EPOLLWRNORM | EPOLLWRBAND); | |
f288bef4 YX |
1899 | rcu_read_unlock(); |
1900 | } | |
1901 | ||
1902 | /** | |
1903 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1904 | * @sk: socket | |
1905 | * @len: the length of messages | |
1906 | */ | |
676d2369 | 1907 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1908 | { |
1909 | struct socket_wq *wq; | |
1910 | ||
1911 | rcu_read_lock(); | |
1912 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1913 | if (skwq_has_sleeper(wq)) |
a9a08845 LT |
1914 | wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN | |
1915 | EPOLLRDNORM | EPOLLRDBAND); | |
f288bef4 YX |
1916 | rcu_read_unlock(); |
1917 | } | |
1918 | ||
f4195d1e YX |
1919 | static void tipc_sock_destruct(struct sock *sk) |
1920 | { | |
1921 | __skb_queue_purge(&sk->sk_receive_queue); | |
1922 | } | |
1923 | ||
64ac5f59 JM |
1924 | static void tipc_sk_proto_rcv(struct sock *sk, |
1925 | struct sk_buff_head *inputq, | |
1926 | struct sk_buff_head *xmitq) | |
1927 | { | |
1928 | struct sk_buff *skb = __skb_dequeue(inputq); | |
1929 | struct tipc_sock *tsk = tipc_sk(sk); | |
1930 | struct tipc_msg *hdr = buf_msg(skb); | |
75da2163 | 1931 | struct tipc_group *grp = tsk->group; |
b7d42635 | 1932 | bool wakeup = false; |
64ac5f59 JM |
1933 | |
1934 | switch (msg_user(hdr)) { | |
1935 | case CONN_MANAGER: | |
1936 | tipc_sk_conn_proto_rcv(tsk, skb, xmitq); | |
1937 | return; | |
1938 | case SOCK_WAKEUP: | |
a80ae530 | 1939 | tipc_dest_del(&tsk->cong_links, msg_orignode(hdr), 0); |
64ac5f59 | 1940 | tsk->cong_link_cnt--; |
b7d42635 | 1941 | wakeup = true; |
64ac5f59 | 1942 | break; |
75da2163 | 1943 | case GROUP_PROTOCOL: |
b7d42635 | 1944 | tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq); |
75da2163 | 1945 | break; |
64ac5f59 | 1946 | case TOP_SRV: |
b7d42635 | 1947 | tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf, |
7ad32bcb | 1948 | hdr, inputq, xmitq); |
64ac5f59 JM |
1949 | break; |
1950 | default: | |
1951 | break; | |
1952 | } | |
1953 | ||
b7d42635 JM |
1954 | if (wakeup) |
1955 | sk->sk_write_space(sk); | |
1956 | ||
64ac5f59 JM |
1957 | kfree_skb(skb); |
1958 | } | |
1959 | ||
7e6c131e | 1960 | /** |
64ac5f59 | 1961 | * tipc_filter_connect - Handle incoming message for a connection-based socket |
58ed9442 | 1962 | * @tsk: TIPC socket |
1186adf7 | 1963 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1964 | * |
cda3696d | 1965 | * Returns true if everything ok, false otherwise |
7e6c131e | 1966 | */ |
64ac5f59 | 1967 | static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1968 | { |
58ed9442 | 1969 | struct sock *sk = &tsk->sk; |
f2f9800d | 1970 | struct net *net = sock_net(sk); |
cda3696d | 1971 | struct tipc_msg *hdr = buf_msg(skb); |
4e0df495 PB |
1972 | u32 pport = msg_origport(hdr); |
1973 | u32 pnode = msg_orignode(hdr); | |
7e6c131e | 1974 | |
cda3696d JPM |
1975 | if (unlikely(msg_mcast(hdr))) |
1976 | return false; | |
7e6c131e | 1977 | |
99a20889 PB |
1978 | switch (sk->sk_state) { |
1979 | case TIPC_CONNECTING: | |
cda3696d | 1980 | /* Accept only ACK or NACK message */ |
4e0df495 PB |
1981 | if (unlikely(!msg_connected(hdr))) { |
1982 | if (pport != tsk_peer_port(tsk) || | |
1983 | pnode != tsk_peer_node(tsk)) | |
1984 | return false; | |
1985 | ||
1986 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1987 | sk->sk_err = ECONNREFUSED; | |
1988 | sk->sk_state_change(sk); | |
1989 | return true; | |
1990 | } | |
dadebc00 | 1991 | |
cda3696d | 1992 | if (unlikely(msg_errcode(hdr))) { |
9fd4b070 | 1993 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2c8d8518 | 1994 | sk->sk_err = ECONNREFUSED; |
4e0df495 | 1995 | sk->sk_state_change(sk); |
cda3696d | 1996 | return true; |
584d24b3 YX |
1997 | } |
1998 | ||
cda3696d | 1999 | if (unlikely(!msg_isdata(hdr))) { |
9fd4b070 | 2000 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
dadebc00 | 2001 | sk->sk_err = EINVAL; |
4e0df495 | 2002 | sk->sk_state_change(sk); |
cda3696d | 2003 | return true; |
584d24b3 YX |
2004 | } |
2005 | ||
cda3696d JPM |
2006 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
2007 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 | 2008 | |
cda3696d JPM |
2009 | /* If 'ACK+' message, add to socket receive queue */ |
2010 | if (msg_data_sz(hdr)) | |
2011 | return true; | |
2012 | ||
2013 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
42b531de | 2014 | sk->sk_data_ready(sk); |
cda3696d JPM |
2015 | |
2016 | /* 'ACK-' message is neither accepted nor rejected: */ | |
2017 | msg_set_dest_droppable(hdr, 1); | |
2018 | return false; | |
cda3696d | 2019 | |
438adcaf | 2020 | case TIPC_OPEN: |
9fd4b070 | 2021 | case TIPC_DISCONNECTING: |
438adcaf PB |
2022 | break; |
2023 | case TIPC_LISTEN: | |
7e6c131e | 2024 | /* Accept only SYN message */ |
cda3696d JPM |
2025 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
2026 | return true; | |
7e6c131e | 2027 | break; |
f40acbaf PB |
2028 | case TIPC_ESTABLISHED: |
2029 | /* Accept only connection-based messages sent by peer */ | |
2030 | if (unlikely(!tsk_peer_msg(tsk, hdr))) | |
2031 | return false; | |
2032 | ||
2033 | if (unlikely(msg_errcode(hdr))) { | |
2034 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2035 | /* Let timer expire on it's own */ | |
2036 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
2037 | tsk->portid); | |
2038 | sk->sk_state_change(sk); | |
2039 | } | |
2040 | return true; | |
7e6c131e | 2041 | default: |
438adcaf | 2042 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 2043 | } |
438adcaf | 2044 | |
cda3696d | 2045 | return false; |
7e6c131e YX |
2046 | } |
2047 | ||
aba79f33 YX |
2048 | /** |
2049 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
2050 | * @sk: socket | |
10724cc7 | 2051 | * @skb: message |
aba79f33 | 2052 | * |
10724cc7 JPM |
2053 | * For connection oriented messages, irrespective of importance, |
2054 | * default queue limit is 2 MB. | |
aba79f33 | 2055 | * |
10724cc7 JPM |
2056 | * For connectionless messages, queue limits are based on message |
2057 | * importance as follows: | |
aba79f33 | 2058 | * |
10724cc7 JPM |
2059 | * TIPC_LOW_IMPORTANCE (2 MB) |
2060 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
2061 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
2062 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
2063 | * |
2064 | * Returns overload limit according to corresponding message importance | |
2065 | */ | |
10724cc7 | 2066 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 2067 | { |
10724cc7 JPM |
2068 | struct tipc_sock *tsk = tipc_sk(sk); |
2069 | struct tipc_msg *hdr = buf_msg(skb); | |
2070 | ||
b7d42635 JM |
2071 | if (unlikely(msg_in_group(hdr))) |
2072 | return sk->sk_rcvbuf; | |
2073 | ||
10724cc7 JPM |
2074 | if (unlikely(!msg_connected(hdr))) |
2075 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 2076 | |
10724cc7 JPM |
2077 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
2078 | return sk->sk_rcvbuf; | |
0cee6bbe | 2079 | |
10724cc7 | 2080 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
2081 | } |
2082 | ||
c4307285 | 2083 | /** |
64ac5f59 | 2084 | * tipc_sk_filter_rcv - validate incoming message |
0c3141e9 | 2085 | * @sk: socket |
cda3696d | 2086 | * @skb: pointer to message. |
c4307285 | 2087 | * |
0c3141e9 AS |
2088 | * Enqueues message on receive queue if acceptable; optionally handles |
2089 | * disconnect indication for a connected socket. | |
2090 | * | |
1186adf7 | 2091 | * Called with socket lock already taken |
c4307285 | 2092 | * |
b97bf3fd | 2093 | */ |
64ac5f59 JM |
2094 | static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb, |
2095 | struct sk_buff_head *xmitq) | |
b97bf3fd | 2096 | { |
64ac5f59 | 2097 | bool sk_conn = !tipc_sk_type_connectionless(sk); |
58ed9442 | 2098 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2099 | struct tipc_group *grp = tsk->group; |
cda3696d | 2100 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
2101 | struct net *net = sock_net(sk); |
2102 | struct sk_buff_head inputq; | |
2103 | int limit, err = TIPC_OK; | |
ec8a2e56 | 2104 | |
64ac5f59 JM |
2105 | TIPC_SKB_CB(skb)->bytes_read = 0; |
2106 | __skb_queue_head_init(&inputq); | |
2107 | __skb_queue_tail(&inputq, skb); | |
50100a5e | 2108 | |
64ac5f59 JM |
2109 | if (unlikely(!msg_isdata(hdr))) |
2110 | tipc_sk_proto_rcv(sk, &inputq, xmitq); | |
0c3141e9 | 2111 | |
75da2163 JM |
2112 | if (unlikely(grp)) |
2113 | tipc_group_filter_msg(grp, &inputq, xmitq); | |
2114 | ||
64ac5f59 JM |
2115 | /* Validate and add to receive buffer if there is space */ |
2116 | while ((skb = __skb_dequeue(&inputq))) { | |
2117 | hdr = buf_msg(skb); | |
2118 | limit = rcvbuf_limit(sk, skb); | |
2119 | if ((sk_conn && !tipc_sk_filter_connect(tsk, skb)) || | |
75da2163 JM |
2120 | (!sk_conn && msg_connected(hdr)) || |
2121 | (!grp && msg_in_group(hdr))) | |
cda3696d | 2122 | err = TIPC_ERR_NO_PORT; |
872619d8 GM |
2123 | else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) { |
2124 | atomic_inc(&sk->sk_drops); | |
64ac5f59 | 2125 | err = TIPC_ERR_OVERLOAD; |
872619d8 | 2126 | } |
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 | 2204 | onode = tipc_own_addr(sock_net(sk)); |
872619d8 | 2205 | atomic_inc(&sk->sk_drops); |
f1d048f2 JPM |
2206 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) |
2207 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 2208 | break; |
c637c103 | 2209 | } |
d570d864 JPM |
2210 | } |
2211 | ||
0c3141e9 | 2212 | /** |
c637c103 JPM |
2213 | * tipc_sk_rcv - handle a chain of incoming buffers |
2214 | * @inputq: buffer list containing the buffers | |
2215 | * Consumes all buffers in list until inputq is empty | |
2216 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 2217 | */ |
cda3696d | 2218 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 2219 | { |
f1d048f2 | 2220 | struct sk_buff_head xmitq; |
c637c103 | 2221 | u32 dnode, dport = 0; |
9871b27f | 2222 | int err; |
9816f061 | 2223 | struct tipc_sock *tsk; |
9816f061 | 2224 | struct sock *sk; |
cda3696d | 2225 | struct sk_buff *skb; |
9816f061 | 2226 | |
f1d048f2 | 2227 | __skb_queue_head_init(&xmitq); |
c637c103 | 2228 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
2229 | dport = tipc_skb_peek_port(inputq, dport); |
2230 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 2231 | |
c637c103 JPM |
2232 | if (likely(tsk)) { |
2233 | sk = &tsk->sk; | |
2234 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 2235 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 2236 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 2237 | } |
f1d048f2 | 2238 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2239 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
c637c103 | 2240 | sock_put(sk); |
c637c103 | 2241 | continue; |
c637c103 | 2242 | } |
cda3696d JPM |
2243 | /* No destination socket => dequeue skb if still there */ |
2244 | skb = tipc_skb_dequeue(inputq, dport); | |
2245 | if (!skb) | |
2246 | return; | |
2247 | ||
2248 | /* Try secondary lookup if unresolved named message */ | |
2249 | err = TIPC_ERR_NO_PORT; | |
2250 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
2251 | goto xmit; | |
2252 | ||
2253 | /* Prepare for message rejection */ | |
2254 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 2255 | continue; |
e3a77561 | 2256 | xmit: |
cda3696d | 2257 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 2258 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 2259 | } |
b97bf3fd PL |
2260 | } |
2261 | ||
78eb3a53 YX |
2262 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
2263 | { | |
d9dc8b0f | 2264 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 2265 | struct sock *sk = sock->sk; |
78eb3a53 YX |
2266 | int done; |
2267 | ||
2268 | do { | |
2269 | int err = sock_error(sk); | |
2270 | if (err) | |
2271 | return err; | |
2272 | if (!*timeo_p) | |
2273 | return -ETIMEDOUT; | |
2274 | if (signal_pending(current)) | |
2275 | return sock_intr_errno(*timeo_p); | |
2276 | ||
d9dc8b0f | 2277 | add_wait_queue(sk_sleep(sk), &wait); |
99a20889 | 2278 | done = sk_wait_event(sk, timeo_p, |
d9dc8b0f WC |
2279 | sk->sk_state != TIPC_CONNECTING, &wait); |
2280 | remove_wait_queue(sk_sleep(sk), &wait); | |
78eb3a53 YX |
2281 | } while (!done); |
2282 | return 0; | |
2283 | } | |
2284 | ||
b97bf3fd | 2285 | /** |
247f0f3c | 2286 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
2287 | * @sock: socket structure |
2288 | * @dest: socket address for destination port | |
2289 | * @destlen: size of socket address data structure | |
0c3141e9 | 2290 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
2291 | * |
2292 | * Returns 0 on success, errno otherwise | |
2293 | */ | |
247f0f3c YX |
2294 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
2295 | int destlen, int flags) | |
b97bf3fd | 2296 | { |
0c3141e9 | 2297 | struct sock *sk = sock->sk; |
f2f8036e | 2298 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
2299 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
2300 | struct msghdr m = {NULL,}; | |
f2f8036e | 2301 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 2302 | int previous; |
f2f8036e | 2303 | int res = 0; |
b89741a0 | 2304 | |
23998835 JM |
2305 | if (destlen != sizeof(struct sockaddr_tipc)) |
2306 | return -EINVAL; | |
2307 | ||
0c3141e9 AS |
2308 | lock_sock(sk); |
2309 | ||
75da2163 JM |
2310 | if (tsk->group) { |
2311 | res = -EINVAL; | |
2312 | goto exit; | |
2313 | } | |
2314 | ||
23998835 JM |
2315 | if (dst->family == AF_UNSPEC) { |
2316 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); | |
2317 | if (!tipc_sk_type_connectionless(sk)) | |
610600c8 | 2318 | res = -EINVAL; |
0c3141e9 | 2319 | goto exit; |
23998835 JM |
2320 | } else if (dst->family != AF_TIPC) { |
2321 | res = -EINVAL; | |
0c3141e9 | 2322 | } |
23998835 | 2323 | if (dst->addrtype != TIPC_ADDR_ID && dst->addrtype != TIPC_ADDR_NAME) |
0c3141e9 | 2324 | res = -EINVAL; |
23998835 JM |
2325 | if (res) |
2326 | goto exit; | |
2327 | ||
2328 | /* DGRAM/RDM connect(), just save the destaddr */ | |
2329 | if (tipc_sk_type_connectionless(sk)) { | |
2330 | memcpy(&tsk->peer, dest, destlen); | |
0c3141e9 AS |
2331 | goto exit; |
2332 | } | |
2333 | ||
99a20889 | 2334 | previous = sk->sk_state; |
438adcaf PB |
2335 | |
2336 | switch (sk->sk_state) { | |
2337 | case TIPC_OPEN: | |
584d24b3 YX |
2338 | /* Send a 'SYN-' to destination */ |
2339 | m.msg_name = dest; | |
2340 | m.msg_namelen = destlen; | |
2341 | ||
2342 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
2343 | * indicate send_msg() is never blocked. | |
2344 | */ | |
2345 | if (!timeout) | |
2346 | m.msg_flags = MSG_DONTWAIT; | |
2347 | ||
39a0295f | 2348 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
2349 | if ((res < 0) && (res != -EWOULDBLOCK)) |
2350 | goto exit; | |
2351 | ||
99a20889 | 2352 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
2353 | * difference is that return value in non-blocking |
2354 | * case is EINPROGRESS, rather than EALREADY. | |
2355 | */ | |
2356 | res = -EINPROGRESS; | |
99a20889 PB |
2357 | /* fall thru' */ |
2358 | case TIPC_CONNECTING: | |
2359 | if (!timeout) { | |
2360 | if (previous == TIPC_CONNECTING) | |
2361 | res = -EALREADY; | |
78eb3a53 | 2362 | goto exit; |
99a20889 | 2363 | } |
78eb3a53 YX |
2364 | timeout = msecs_to_jiffies(timeout); |
2365 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
2366 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
2367 | break; |
2368 | case TIPC_ESTABLISHED: | |
584d24b3 | 2369 | res = -EISCONN; |
f40acbaf PB |
2370 | break; |
2371 | default: | |
584d24b3 | 2372 | res = -EINVAL; |
f40acbaf | 2373 | } |
99a20889 | 2374 | |
0c3141e9 AS |
2375 | exit: |
2376 | release_sock(sk); | |
b89741a0 | 2377 | return res; |
b97bf3fd PL |
2378 | } |
2379 | ||
c4307285 | 2380 | /** |
247f0f3c | 2381 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
2382 | * @sock: socket structure |
2383 | * @len: (unused) | |
c4307285 | 2384 | * |
b97bf3fd PL |
2385 | * Returns 0 on success, errno otherwise |
2386 | */ | |
247f0f3c | 2387 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 2388 | { |
0c3141e9 AS |
2389 | struct sock *sk = sock->sk; |
2390 | int res; | |
2391 | ||
2392 | lock_sock(sk); | |
0c288c86 | 2393 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 2394 | release_sock(sk); |
0c288c86 | 2395 | |
0c3141e9 | 2396 | return res; |
b97bf3fd PL |
2397 | } |
2398 | ||
6398e23c YX |
2399 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2400 | { | |
2401 | struct sock *sk = sock->sk; | |
2402 | DEFINE_WAIT(wait); | |
2403 | int err; | |
2404 | ||
2405 | /* True wake-one mechanism for incoming connections: only | |
2406 | * one process gets woken up, not the 'whole herd'. | |
2407 | * Since we do not 'race & poll' for established sockets | |
2408 | * anymore, the common case will execute the loop only once. | |
2409 | */ | |
2410 | for (;;) { | |
2411 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2412 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2413 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2414 | release_sock(sk); |
2415 | timeo = schedule_timeout(timeo); | |
2416 | lock_sock(sk); | |
2417 | } | |
2418 | err = 0; | |
2419 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2420 | break; | |
6398e23c YX |
2421 | err = -EAGAIN; |
2422 | if (!timeo) | |
2423 | break; | |
143fe22f EH |
2424 | err = sock_intr_errno(timeo); |
2425 | if (signal_pending(current)) | |
2426 | break; | |
6398e23c YX |
2427 | } |
2428 | finish_wait(sk_sleep(sk), &wait); | |
2429 | return err; | |
2430 | } | |
2431 | ||
c4307285 | 2432 | /** |
247f0f3c | 2433 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2434 | * @sock: listening socket |
2435 | * @newsock: new socket that is to be connected | |
2436 | * @flags: file-related flags associated with socket | |
c4307285 | 2437 | * |
b97bf3fd PL |
2438 | * Returns 0 on success, errno otherwise |
2439 | */ | |
cdfbabfb DH |
2440 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
2441 | bool kern) | |
b97bf3fd | 2442 | { |
0fef8f20 | 2443 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2444 | struct sk_buff *buf; |
301bae56 | 2445 | struct tipc_sock *new_tsock; |
0fef8f20 | 2446 | struct tipc_msg *msg; |
6398e23c | 2447 | long timeo; |
0c3141e9 | 2448 | int res; |
b97bf3fd | 2449 | |
0c3141e9 | 2450 | lock_sock(sk); |
b97bf3fd | 2451 | |
0c288c86 | 2452 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2453 | res = -EINVAL; |
b97bf3fd PL |
2454 | goto exit; |
2455 | } | |
6398e23c YX |
2456 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2457 | res = tipc_wait_for_accept(sock, timeo); | |
2458 | if (res) | |
2459 | goto exit; | |
0c3141e9 AS |
2460 | |
2461 | buf = skb_peek(&sk->sk_receive_queue); | |
2462 | ||
cdfbabfb | 2463 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern); |
0fef8f20 PG |
2464 | if (res) |
2465 | goto exit; | |
fdd75ea8 | 2466 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2467 | |
0fef8f20 | 2468 | new_sk = new_sock->sk; |
301bae56 | 2469 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2470 | msg = buf_msg(buf); |
b97bf3fd | 2471 | |
0fef8f20 PG |
2472 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2473 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2474 | ||
2475 | /* | |
2476 | * Reject any stray messages received by new socket | |
2477 | * before the socket lock was taken (very, very unlikely) | |
2478 | */ | |
2e84c60b | 2479 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2480 | |
2481 | /* Connect new socket to it's peer */ | |
301bae56 | 2482 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2483 | |
301bae56 | 2484 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2485 | if (msg_named(msg)) { |
301bae56 JPM |
2486 | new_tsock->conn_type = msg_nametype(msg); |
2487 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2488 | } |
0fef8f20 PG |
2489 | |
2490 | /* | |
2491 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2492 | * Respond to 'SYN+' by queuing it on new socket. | |
2493 | */ | |
2494 | if (!msg_data_sz(msg)) { | |
2495 | struct msghdr m = {NULL,}; | |
2496 | ||
2e84c60b | 2497 | tsk_advance_rx_queue(sk); |
365ad353 | 2498 | __tipc_sendstream(new_sock, &m, 0); |
0fef8f20 PG |
2499 | } else { |
2500 | __skb_dequeue(&sk->sk_receive_queue); | |
2501 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2502 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2503 | } |
2504 | release_sock(new_sk); | |
b97bf3fd | 2505 | exit: |
0c3141e9 | 2506 | release_sock(sk); |
b97bf3fd PL |
2507 | return res; |
2508 | } | |
2509 | ||
2510 | /** | |
247f0f3c | 2511 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2512 | * @sock: socket structure |
e247a8f5 | 2513 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2514 | * |
2515 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2516 | * |
b97bf3fd PL |
2517 | * Returns 0 on success, errno otherwise |
2518 | */ | |
247f0f3c | 2519 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2520 | { |
0c3141e9 | 2521 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2522 | int res; |
2523 | ||
e247a8f5 AS |
2524 | if (how != SHUT_RDWR) |
2525 | return -EINVAL; | |
b97bf3fd | 2526 | |
0c3141e9 | 2527 | lock_sock(sk); |
b97bf3fd | 2528 | |
6f00089c PB |
2529 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2530 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2531 | |
6f00089c | 2532 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2533 | /* Discard any unreceived messages */ |
57467e56 | 2534 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2535 | |
2536 | /* Wake up anyone sleeping in poll */ | |
2537 | sk->sk_state_change(sk); | |
b97bf3fd | 2538 | res = 0; |
6f00089c | 2539 | } else { |
b97bf3fd PL |
2540 | res = -ENOTCONN; |
2541 | } | |
2542 | ||
0c3141e9 | 2543 | release_sock(sk); |
b97bf3fd PL |
2544 | return res; |
2545 | } | |
2546 | ||
31b102bb | 2547 | static void tipc_sk_timeout(struct timer_list *t) |
57289015 | 2548 | { |
31b102bb KC |
2549 | struct sock *sk = from_timer(sk, t, sk_timer); |
2550 | struct tipc_sock *tsk = tipc_sk(sk); | |
0d5fcebf JM |
2551 | u32 peer_port = tsk_peer_port(tsk); |
2552 | u32 peer_node = tsk_peer_node(tsk); | |
2553 | u32 own_node = tsk_own_node(tsk); | |
2554 | u32 own_port = tsk->portid; | |
0d5fcebf | 2555 | struct net *net = sock_net(sk); |
a6ca1094 | 2556 | struct sk_buff *skb = NULL; |
57289015 | 2557 | |
6c9808ce | 2558 | bh_lock_sock(sk); |
0d5fcebf JM |
2559 | if (!tipc_sk_connected(sk)) |
2560 | goto exit; | |
2561 | ||
2562 | /* Try again later if socket is busy */ | |
2563 | if (sock_owned_by_user(sk)) { | |
2564 | sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20); | |
6c9808ce | 2565 | goto exit; |
57289015 | 2566 | } |
57289015 | 2567 | |
8ea642ee | 2568 | if (tsk->probe_unacked) { |
0d5fcebf JM |
2569 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2570 | tipc_node_remove_conn(net, peer_node, peer_port); | |
2571 | sk->sk_state_change(sk); | |
360aab6b | 2572 | goto exit; |
57289015 | 2573 | } |
0d5fcebf JM |
2574 | /* Send new probe */ |
2575 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0, | |
2576 | peer_node, own_node, peer_port, own_port, | |
2577 | TIPC_OK); | |
8ea642ee | 2578 | tsk->probe_unacked = true; |
0d5fcebf JM |
2579 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
2580 | exit: | |
57289015 | 2581 | bh_unlock_sock(sk); |
a6ca1094 | 2582 | if (skb) |
0d5fcebf | 2583 | tipc_node_xmit_skb(net, skb, peer_node, own_port); |
07f6c4bc | 2584 | sock_put(sk); |
57289015 JPM |
2585 | } |
2586 | ||
301bae56 | 2587 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2588 | struct tipc_name_seq const *seq) |
2589 | { | |
d6fb7e9c PB |
2590 | struct sock *sk = &tsk->sk; |
2591 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2592 | struct publication *publ; |
2593 | u32 key; | |
2594 | ||
928df188 JM |
2595 | if (scope != TIPC_NODE_SCOPE) |
2596 | scope = TIPC_CLUSTER_SCOPE; | |
2597 | ||
d6fb7e9c | 2598 | if (tipc_sk_connected(sk)) |
0fc87aae | 2599 | return -EINVAL; |
07f6c4bc YX |
2600 | key = tsk->portid + tsk->pub_count + 1; |
2601 | if (key == tsk->portid) | |
0fc87aae JPM |
2602 | return -EADDRINUSE; |
2603 | ||
f2f9800d | 2604 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2605 | scope, tsk->portid, key); |
0fc87aae JPM |
2606 | if (unlikely(!publ)) |
2607 | return -EINVAL; | |
2608 | ||
e50e73e1 | 2609 | list_add(&publ->binding_sock, &tsk->publications); |
301bae56 JPM |
2610 | tsk->pub_count++; |
2611 | tsk->published = 1; | |
0fc87aae JPM |
2612 | return 0; |
2613 | } | |
2614 | ||
301bae56 | 2615 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2616 | struct tipc_name_seq const *seq) |
2617 | { | |
f2f9800d | 2618 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2619 | struct publication *publ; |
2620 | struct publication *safe; | |
2621 | int rc = -EINVAL; | |
2622 | ||
928df188 JM |
2623 | if (scope != TIPC_NODE_SCOPE) |
2624 | scope = TIPC_CLUSTER_SCOPE; | |
2625 | ||
e50e73e1 | 2626 | list_for_each_entry_safe(publ, safe, &tsk->publications, binding_sock) { |
0fc87aae JPM |
2627 | if (seq) { |
2628 | if (publ->scope != scope) | |
2629 | continue; | |
2630 | if (publ->type != seq->type) | |
2631 | continue; | |
2632 | if (publ->lower != seq->lower) | |
2633 | continue; | |
2634 | if (publ->upper != seq->upper) | |
2635 | break; | |
f2f9800d | 2636 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
e50e73e1 | 2637 | publ->port, publ->key); |
0fc87aae JPM |
2638 | rc = 0; |
2639 | break; | |
2640 | } | |
f2f9800d | 2641 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
e50e73e1 | 2642 | publ->port, publ->key); |
0fc87aae JPM |
2643 | rc = 0; |
2644 | } | |
301bae56 JPM |
2645 | if (list_empty(&tsk->publications)) |
2646 | tsk->published = 0; | |
0fc87aae JPM |
2647 | return rc; |
2648 | } | |
2649 | ||
5a9ee0be JPM |
2650 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2651 | * when we go from standalone to network mode. | |
2652 | */ | |
e05b31f4 | 2653 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2654 | { |
e05b31f4 | 2655 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
40f9f439 | 2656 | struct rhashtable_iter iter; |
07f6c4bc | 2657 | struct tipc_sock *tsk; |
5a9ee0be | 2658 | struct tipc_msg *msg; |
5a9ee0be | 2659 | |
40f9f439 HX |
2660 | rhashtable_walk_enter(&tn->sk_rht, &iter); |
2661 | ||
2662 | do { | |
97a6ec4a | 2663 | rhashtable_walk_start(&iter); |
40f9f439 HX |
2664 | |
2665 | while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) { | |
07f6c4bc YX |
2666 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
2667 | msg = &tsk->phdr; | |
23fd3eac JM |
2668 | msg_set_prevnode(msg, tipc_own_addr(net)); |
2669 | msg_set_orignode(msg, tipc_own_addr(net)); | |
07f6c4bc YX |
2670 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2671 | } | |
97a6ec4a | 2672 | |
40f9f439 HX |
2673 | rhashtable_walk_stop(&iter); |
2674 | } while (tsk == ERR_PTR(-EAGAIN)); | |
5a9ee0be JPM |
2675 | } |
2676 | ||
e05b31f4 | 2677 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2678 | { |
e05b31f4 | 2679 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2680 | struct tipc_sock *tsk; |
808d90f9 | 2681 | |
07f6c4bc | 2682 | rcu_read_lock(); |
6cca7289 | 2683 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2684 | if (tsk) |
2685 | sock_hold(&tsk->sk); | |
2686 | rcu_read_unlock(); | |
808d90f9 | 2687 | |
07f6c4bc | 2688 | return tsk; |
808d90f9 JPM |
2689 | } |
2690 | ||
07f6c4bc | 2691 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2692 | { |
e05b31f4 YX |
2693 | struct sock *sk = &tsk->sk; |
2694 | struct net *net = sock_net(sk); | |
2695 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2696 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2697 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2698 | |
07f6c4bc YX |
2699 | while (remaining--) { |
2700 | portid++; | |
2701 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2702 | portid = TIPC_MIN_PORT; | |
2703 | tsk->portid = portid; | |
2704 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2705 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2706 | tsk_rht_params)) | |
07f6c4bc YX |
2707 | return 0; |
2708 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2709 | } |
2710 | ||
07f6c4bc | 2711 | return -1; |
808d90f9 JPM |
2712 | } |
2713 | ||
07f6c4bc | 2714 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2715 | { |
07f6c4bc | 2716 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2717 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2718 | |
6cca7289 | 2719 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
41c6d650 | 2720 | WARN_ON(refcount_read(&sk->sk_refcnt) == 1); |
07f6c4bc | 2721 | __sock_put(sk); |
808d90f9 | 2722 | } |
808d90f9 JPM |
2723 | } |
2724 | ||
6cca7289 HX |
2725 | static const struct rhashtable_params tsk_rht_params = { |
2726 | .nelem_hint = 192, | |
2727 | .head_offset = offsetof(struct tipc_sock, node), | |
2728 | .key_offset = offsetof(struct tipc_sock, portid), | |
2729 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2730 | .max_size = 1048576, |
2731 | .min_size = 256, | |
b5e2c150 | 2732 | .automatic_shrinking = true, |
6cca7289 HX |
2733 | }; |
2734 | ||
e05b31f4 | 2735 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2736 | { |
e05b31f4 | 2737 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2738 | |
2739 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2740 | } |
2741 | ||
e05b31f4 | 2742 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2743 | { |
e05b31f4 YX |
2744 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2745 | ||
07f6c4bc YX |
2746 | /* Wait for socket readers to complete */ |
2747 | synchronize_net(); | |
808d90f9 | 2748 | |
e05b31f4 | 2749 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2750 | } |
2751 | ||
75da2163 JM |
2752 | static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq) |
2753 | { | |
2754 | struct net *net = sock_net(&tsk->sk); | |
75da2163 JM |
2755 | struct tipc_group *grp = tsk->group; |
2756 | struct tipc_msg *hdr = &tsk->phdr; | |
2757 | struct tipc_name_seq seq; | |
2758 | int rc; | |
2759 | ||
2760 | if (mreq->type < TIPC_RESERVED_TYPES) | |
2761 | return -EACCES; | |
232d07b7 JM |
2762 | if (mreq->scope > TIPC_NODE_SCOPE) |
2763 | return -EINVAL; | |
75da2163 JM |
2764 | if (grp) |
2765 | return -EACCES; | |
60c25306 | 2766 | grp = tipc_group_create(net, tsk->portid, mreq, &tsk->group_is_open); |
75da2163 JM |
2767 | if (!grp) |
2768 | return -ENOMEM; | |
2769 | tsk->group = grp; | |
2770 | msg_set_lookup_scope(hdr, mreq->scope); | |
2771 | msg_set_nametype(hdr, mreq->type); | |
2772 | msg_set_dest_droppable(hdr, true); | |
2773 | seq.type = mreq->type; | |
2774 | seq.lower = mreq->instance; | |
2775 | seq.upper = seq.lower; | |
232d07b7 | 2776 | tipc_nametbl_build_group(net, grp, mreq->type, mreq->scope); |
75da2163 | 2777 | rc = tipc_sk_publish(tsk, mreq->scope, &seq); |
e233df01 | 2778 | if (rc) { |
75da2163 | 2779 | tipc_group_delete(net, grp); |
e233df01 | 2780 | tsk->group = NULL; |
febafc84 | 2781 | return rc; |
e233df01 | 2782 | } |
d12d2e12 | 2783 | /* Eliminate any risk that a broadcast overtakes sent JOINs */ |
399574d4 JM |
2784 | tsk->mc_method.rcast = true; |
2785 | tsk->mc_method.mandatory = true; | |
d12d2e12 | 2786 | tipc_group_join(net, grp, &tsk->sk.sk_rcvbuf); |
75da2163 JM |
2787 | return rc; |
2788 | } | |
2789 | ||
2790 | static int tipc_sk_leave(struct tipc_sock *tsk) | |
2791 | { | |
2792 | struct net *net = sock_net(&tsk->sk); | |
2793 | struct tipc_group *grp = tsk->group; | |
2794 | struct tipc_name_seq seq; | |
2795 | int scope; | |
2796 | ||
2797 | if (!grp) | |
2798 | return -EINVAL; | |
2799 | tipc_group_self(grp, &seq, &scope); | |
2800 | tipc_group_delete(net, grp); | |
2801 | tsk->group = NULL; | |
2802 | tipc_sk_withdraw(tsk, scope, &seq); | |
2803 | return 0; | |
2804 | } | |
2805 | ||
b97bf3fd | 2806 | /** |
247f0f3c | 2807 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2808 | * @sock: socket structure |
2809 | * @lvl: option level | |
2810 | * @opt: option identifier | |
2811 | * @ov: pointer to new option value | |
2812 | * @ol: length of option value | |
c4307285 YH |
2813 | * |
2814 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2815 | * (to ease compatibility). |
c4307285 | 2816 | * |
b97bf3fd PL |
2817 | * Returns 0 on success, errno otherwise |
2818 | */ | |
247f0f3c YX |
2819 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2820 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2821 | { |
0c3141e9 | 2822 | struct sock *sk = sock->sk; |
58ed9442 | 2823 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2824 | struct tipc_group_req mreq; |
01fd12bb | 2825 | u32 value = 0; |
a08ef476 | 2826 | int res = 0; |
b97bf3fd | 2827 | |
c4307285 YH |
2828 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2829 | return 0; | |
b97bf3fd PL |
2830 | if (lvl != SOL_TIPC) |
2831 | return -ENOPROTOOPT; | |
01fd12bb JPM |
2832 | |
2833 | switch (opt) { | |
2834 | case TIPC_IMPORTANCE: | |
2835 | case TIPC_SRC_DROPPABLE: | |
2836 | case TIPC_DEST_DROPPABLE: | |
2837 | case TIPC_CONN_TIMEOUT: | |
2838 | if (ol < sizeof(value)) | |
2839 | return -EINVAL; | |
75da2163 JM |
2840 | if (get_user(value, (u32 __user *)ov)) |
2841 | return -EFAULT; | |
2842 | break; | |
2843 | case TIPC_GROUP_JOIN: | |
2844 | if (ol < sizeof(mreq)) | |
2845 | return -EINVAL; | |
2846 | if (copy_from_user(&mreq, ov, sizeof(mreq))) | |
2847 | return -EFAULT; | |
01fd12bb JPM |
2848 | break; |
2849 | default: | |
2850 | if (ov || ol) | |
2851 | return -EINVAL; | |
2852 | } | |
b97bf3fd | 2853 | |
0c3141e9 | 2854 | lock_sock(sk); |
c4307285 | 2855 | |
b97bf3fd PL |
2856 | switch (opt) { |
2857 | case TIPC_IMPORTANCE: | |
301bae56 | 2858 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2859 | break; |
2860 | case TIPC_SRC_DROPPABLE: | |
2861 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2862 | tsk_set_unreliable(tsk, value); |
c4307285 | 2863 | else |
b97bf3fd PL |
2864 | res = -ENOPROTOOPT; |
2865 | break; | |
2866 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2867 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2868 | break; |
2869 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2870 | tipc_sk(sk)->conn_timeout = value; |
b97bf3fd | 2871 | break; |
01fd12bb JPM |
2872 | case TIPC_MCAST_BROADCAST: |
2873 | tsk->mc_method.rcast = false; | |
2874 | tsk->mc_method.mandatory = true; | |
2875 | break; | |
2876 | case TIPC_MCAST_REPLICAST: | |
2877 | tsk->mc_method.rcast = true; | |
2878 | tsk->mc_method.mandatory = true; | |
2879 | break; | |
75da2163 JM |
2880 | case TIPC_GROUP_JOIN: |
2881 | res = tipc_sk_join(tsk, &mreq); | |
2882 | break; | |
2883 | case TIPC_GROUP_LEAVE: | |
2884 | res = tipc_sk_leave(tsk); | |
2885 | break; | |
b97bf3fd PL |
2886 | default: |
2887 | res = -EINVAL; | |
2888 | } | |
2889 | ||
0c3141e9 AS |
2890 | release_sock(sk); |
2891 | ||
b97bf3fd PL |
2892 | return res; |
2893 | } | |
2894 | ||
2895 | /** | |
247f0f3c | 2896 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2897 | * @sock: socket structure |
2898 | * @lvl: option level | |
2899 | * @opt: option identifier | |
2900 | * @ov: receptacle for option value | |
2901 | * @ol: receptacle for length of option value | |
c4307285 YH |
2902 | * |
2903 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2904 | * (to ease compatibility). |
c4307285 | 2905 | * |
b97bf3fd PL |
2906 | * Returns 0 on success, errno otherwise |
2907 | */ | |
247f0f3c YX |
2908 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2909 | char __user *ov, int __user *ol) | |
b97bf3fd | 2910 | { |
0c3141e9 | 2911 | struct sock *sk = sock->sk; |
58ed9442 | 2912 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 JM |
2913 | struct tipc_name_seq seq; |
2914 | int len, scope; | |
b97bf3fd | 2915 | u32 value; |
c4307285 | 2916 | int res; |
b97bf3fd | 2917 | |
c4307285 YH |
2918 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2919 | return put_user(0, ol); | |
b97bf3fd PL |
2920 | if (lvl != SOL_TIPC) |
2921 | return -ENOPROTOOPT; | |
2db9983a AS |
2922 | res = get_user(len, ol); |
2923 | if (res) | |
c4307285 | 2924 | return res; |
b97bf3fd | 2925 | |
0c3141e9 | 2926 | lock_sock(sk); |
b97bf3fd PL |
2927 | |
2928 | switch (opt) { | |
2929 | case TIPC_IMPORTANCE: | |
301bae56 | 2930 | value = tsk_importance(tsk); |
b97bf3fd PL |
2931 | break; |
2932 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2933 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2934 | break; |
2935 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2936 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2937 | break; |
2938 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2939 | value = tsk->conn_timeout; |
0c3141e9 | 2940 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2941 | break; |
0e65967e | 2942 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2943 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2944 | break; |
0e65967e | 2945 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2946 | value = skb_queue_len(&sk->sk_receive_queue); |
2947 | break; | |
75da2163 JM |
2948 | case TIPC_GROUP_JOIN: |
2949 | seq.type = 0; | |
2950 | if (tsk->group) | |
2951 | tipc_group_self(tsk->group, &seq, &scope); | |
2952 | value = seq.type; | |
2953 | break; | |
b97bf3fd PL |
2954 | default: |
2955 | res = -EINVAL; | |
2956 | } | |
2957 | ||
0c3141e9 AS |
2958 | release_sock(sk); |
2959 | ||
25860c3b PG |
2960 | if (res) |
2961 | return res; /* "get" failed */ | |
b97bf3fd | 2962 | |
25860c3b PG |
2963 | if (len < sizeof(value)) |
2964 | return -EINVAL; | |
2965 | ||
2966 | if (copy_to_user(ov, &value, sizeof(value))) | |
2967 | return -EFAULT; | |
2968 | ||
2969 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2970 | } |
2971 | ||
f2f9800d | 2972 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2973 | { |
f2f9800d | 2974 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2975 | struct tipc_sioc_ln_req lnr; |
2976 | void __user *argp = (void __user *)arg; | |
2977 | ||
2978 | switch (cmd) { | |
2979 | case SIOCGETLINKNAME: | |
2980 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2981 | return -EFAULT; | |
f2f9800d YX |
2982 | if (!tipc_node_get_linkname(sock_net(sk), |
2983 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2984 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2985 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2986 | return -EFAULT; | |
2987 | return 0; | |
2988 | } | |
2989 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2990 | default: |
2991 | return -ENOIOCTLCMD; | |
2992 | } | |
2993 | } | |
2994 | ||
70b03759 EH |
2995 | static int tipc_socketpair(struct socket *sock1, struct socket *sock2) |
2996 | { | |
2997 | struct tipc_sock *tsk2 = tipc_sk(sock2->sk); | |
2998 | struct tipc_sock *tsk1 = tipc_sk(sock1->sk); | |
66bc1e8d EH |
2999 | u32 onode = tipc_own_addr(sock_net(sock1->sk)); |
3000 | ||
3001 | tsk1->peer.family = AF_TIPC; | |
3002 | tsk1->peer.addrtype = TIPC_ADDR_ID; | |
3003 | tsk1->peer.scope = TIPC_NODE_SCOPE; | |
3004 | tsk1->peer.addr.id.ref = tsk2->portid; | |
3005 | tsk1->peer.addr.id.node = onode; | |
3006 | tsk2->peer.family = AF_TIPC; | |
3007 | tsk2->peer.addrtype = TIPC_ADDR_ID; | |
3008 | tsk2->peer.scope = TIPC_NODE_SCOPE; | |
3009 | tsk2->peer.addr.id.ref = tsk1->portid; | |
3010 | tsk2->peer.addr.id.node = onode; | |
3011 | ||
3012 | tipc_sk_finish_conn(tsk1, tsk2->portid, onode); | |
3013 | tipc_sk_finish_conn(tsk2, tsk1->portid, onode); | |
70b03759 EH |
3014 | return 0; |
3015 | } | |
3016 | ||
ae86b9e3 BH |
3017 | /* Protocol switches for the various types of TIPC sockets */ |
3018 | ||
bca65eae | 3019 | static const struct proto_ops msg_ops = { |
0e65967e | 3020 | .owner = THIS_MODULE, |
b97bf3fd | 3021 | .family = AF_TIPC, |
247f0f3c YX |
3022 | .release = tipc_release, |
3023 | .bind = tipc_bind, | |
3024 | .connect = tipc_connect, | |
66bc1e8d | 3025 | .socketpair = tipc_socketpair, |
245f3d34 | 3026 | .accept = sock_no_accept, |
247f0f3c YX |
3027 | .getname = tipc_getname, |
3028 | .poll = tipc_poll, | |
78acb1f9 | 3029 | .ioctl = tipc_ioctl, |
245f3d34 | 3030 | .listen = sock_no_listen, |
247f0f3c YX |
3031 | .shutdown = tipc_shutdown, |
3032 | .setsockopt = tipc_setsockopt, | |
3033 | .getsockopt = tipc_getsockopt, | |
3034 | .sendmsg = tipc_sendmsg, | |
3035 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3036 | .mmap = sock_no_mmap, |
3037 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3038 | }; |
3039 | ||
bca65eae | 3040 | static const struct proto_ops packet_ops = { |
0e65967e | 3041 | .owner = THIS_MODULE, |
b97bf3fd | 3042 | .family = AF_TIPC, |
247f0f3c YX |
3043 | .release = tipc_release, |
3044 | .bind = tipc_bind, | |
3045 | .connect = tipc_connect, | |
70b03759 | 3046 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3047 | .accept = tipc_accept, |
3048 | .getname = tipc_getname, | |
3049 | .poll = tipc_poll, | |
78acb1f9 | 3050 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3051 | .listen = tipc_listen, |
3052 | .shutdown = tipc_shutdown, | |
3053 | .setsockopt = tipc_setsockopt, | |
3054 | .getsockopt = tipc_getsockopt, | |
3055 | .sendmsg = tipc_send_packet, | |
3056 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3057 | .mmap = sock_no_mmap, |
3058 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3059 | }; |
3060 | ||
bca65eae | 3061 | static const struct proto_ops stream_ops = { |
0e65967e | 3062 | .owner = THIS_MODULE, |
b97bf3fd | 3063 | .family = AF_TIPC, |
247f0f3c YX |
3064 | .release = tipc_release, |
3065 | .bind = tipc_bind, | |
3066 | .connect = tipc_connect, | |
70b03759 | 3067 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3068 | .accept = tipc_accept, |
3069 | .getname = tipc_getname, | |
3070 | .poll = tipc_poll, | |
78acb1f9 | 3071 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3072 | .listen = tipc_listen, |
3073 | .shutdown = tipc_shutdown, | |
3074 | .setsockopt = tipc_setsockopt, | |
3075 | .getsockopt = tipc_getsockopt, | |
365ad353 | 3076 | .sendmsg = tipc_sendstream, |
ec8a09fb | 3077 | .recvmsg = tipc_recvstream, |
8238745a YH |
3078 | .mmap = sock_no_mmap, |
3079 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3080 | }; |
3081 | ||
bca65eae | 3082 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 3083 | .owner = THIS_MODULE, |
b97bf3fd | 3084 | .family = AF_TIPC, |
c5fa7b3c | 3085 | .create = tipc_sk_create |
b97bf3fd PL |
3086 | }; |
3087 | ||
3088 | static struct proto tipc_proto = { | |
3089 | .name = "TIPC", | |
3090 | .owner = THIS_MODULE, | |
cc79dd1b YX |
3091 | .obj_size = sizeof(struct tipc_sock), |
3092 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
3093 | }; |
3094 | ||
3095 | /** | |
4323add6 | 3096 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 3097 | * |
b97bf3fd PL |
3098 | * Returns 0 on success, errno otherwise |
3099 | */ | |
4323add6 | 3100 | int tipc_socket_init(void) |
b97bf3fd PL |
3101 | { |
3102 | int res; | |
3103 | ||
c4307285 | 3104 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 3105 | if (res) { |
2cf8aa19 | 3106 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
3107 | goto out; |
3108 | } | |
3109 | ||
3110 | res = sock_register(&tipc_family_ops); | |
3111 | if (res) { | |
2cf8aa19 | 3112 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
3113 | proto_unregister(&tipc_proto); |
3114 | goto out; | |
3115 | } | |
b97bf3fd PL |
3116 | out: |
3117 | return res; | |
3118 | } | |
3119 | ||
3120 | /** | |
4323add6 | 3121 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 3122 | */ |
4323add6 | 3123 | void tipc_socket_stop(void) |
b97bf3fd | 3124 | { |
b97bf3fd PL |
3125 | sock_unregister(tipc_family_ops.family); |
3126 | proto_unregister(&tipc_proto); | |
3127 | } | |
34b78a12 RA |
3128 | |
3129 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 3130 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
3131 | { |
3132 | u32 peer_node; | |
3133 | u32 peer_port; | |
3134 | struct nlattr *nest; | |
3135 | ||
3136 | peer_node = tsk_peer_node(tsk); | |
3137 | peer_port = tsk_peer_port(tsk); | |
3138 | ||
3139 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
3140 | ||
3141 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
3142 | goto msg_full; | |
3143 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
3144 | goto msg_full; | |
3145 | ||
3146 | if (tsk->conn_type != 0) { | |
3147 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
3148 | goto msg_full; | |
3149 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
3150 | goto msg_full; | |
3151 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
3152 | goto msg_full; | |
3153 | } | |
3154 | nla_nest_end(skb, nest); | |
3155 | ||
3156 | return 0; | |
3157 | ||
3158 | msg_full: | |
3159 | nla_nest_cancel(skb, nest); | |
3160 | ||
3161 | return -EMSGSIZE; | |
3162 | } | |
3163 | ||
dfde331e GM |
3164 | static int __tipc_nl_add_sk_info(struct sk_buff *skb, struct tipc_sock |
3165 | *tsk) | |
3166 | { | |
3167 | struct net *net = sock_net(skb->sk); | |
dfde331e GM |
3168 | struct sock *sk = &tsk->sk; |
3169 | ||
3170 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid) || | |
23fd3eac | 3171 | nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tipc_own_addr(net))) |
dfde331e GM |
3172 | return -EMSGSIZE; |
3173 | ||
3174 | if (tipc_sk_connected(sk)) { | |
3175 | if (__tipc_nl_add_sk_con(skb, tsk)) | |
3176 | return -EMSGSIZE; | |
3177 | } else if (!list_empty(&tsk->publications)) { | |
3178 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
3179 | return -EMSGSIZE; | |
3180 | } | |
3181 | return 0; | |
3182 | } | |
3183 | ||
34b78a12 | 3184 | /* Caller should hold socket lock for the passed tipc socket. */ |
d8182804 RA |
3185 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
3186 | struct tipc_sock *tsk) | |
34b78a12 | 3187 | { |
34b78a12 | 3188 | struct nlattr *attrs; |
dfde331e | 3189 | void *hdr; |
34b78a12 RA |
3190 | |
3191 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3192 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
3193 | if (!hdr) |
3194 | goto msg_cancel; | |
3195 | ||
3196 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
3197 | if (!attrs) | |
3198 | goto genlmsg_cancel; | |
dfde331e GM |
3199 | |
3200 | if (__tipc_nl_add_sk_info(skb, tsk)) | |
34b78a12 RA |
3201 | goto attr_msg_cancel; |
3202 | ||
34b78a12 RA |
3203 | nla_nest_end(skb, attrs); |
3204 | genlmsg_end(skb, hdr); | |
3205 | ||
3206 | return 0; | |
3207 | ||
3208 | attr_msg_cancel: | |
3209 | nla_nest_cancel(skb, attrs); | |
3210 | genlmsg_cancel: | |
3211 | genlmsg_cancel(skb, hdr); | |
3212 | msg_cancel: | |
3213 | return -EMSGSIZE; | |
3214 | } | |
3215 | ||
c30b70de GM |
3216 | int tipc_nl_sk_walk(struct sk_buff *skb, struct netlink_callback *cb, |
3217 | int (*skb_handler)(struct sk_buff *skb, | |
3218 | struct netlink_callback *cb, | |
3219 | struct tipc_sock *tsk)) | |
34b78a12 | 3220 | { |
e05b31f4 | 3221 | struct net *net = sock_net(skb->sk); |
dfde331e GM |
3222 | struct tipc_net *tn = tipc_net(net); |
3223 | const struct bucket_table *tbl; | |
d6e164e3 | 3224 | u32 prev_portid = cb->args[1]; |
dfde331e GM |
3225 | u32 tbl_id = cb->args[0]; |
3226 | struct rhash_head *pos; | |
3227 | struct tipc_sock *tsk; | |
3228 | int err; | |
34b78a12 | 3229 | |
07f6c4bc | 3230 | rcu_read_lock(); |
e05b31f4 | 3231 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
3232 | for (; tbl_id < tbl->size; tbl_id++) { |
3233 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 3234 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
3235 | if (prev_portid && prev_portid != tsk->portid) { |
3236 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
3237 | continue; | |
3238 | } | |
3239 | ||
dfde331e | 3240 | err = skb_handler(skb, cb, tsk); |
d6e164e3 RA |
3241 | if (err) { |
3242 | prev_portid = tsk->portid; | |
3243 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
3244 | goto out; | |
3245 | } | |
dfde331e | 3246 | |
d6e164e3 | 3247 | prev_portid = 0; |
07f6c4bc | 3248 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 3249 | } |
34b78a12 | 3250 | } |
d6e164e3 | 3251 | out: |
07f6c4bc | 3252 | rcu_read_unlock(); |
d6e164e3 RA |
3253 | cb->args[0] = tbl_id; |
3254 | cb->args[1] = prev_portid; | |
34b78a12 RA |
3255 | |
3256 | return skb->len; | |
3257 | } | |
c30b70de GM |
3258 | EXPORT_SYMBOL(tipc_nl_sk_walk); |
3259 | ||
3260 | int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct tipc_sock *tsk, | |
3261 | u32 sk_filter_state, | |
3262 | u64 (*tipc_diag_gen_cookie)(struct sock *sk)) | |
3263 | { | |
3264 | struct sock *sk = &tsk->sk; | |
3265 | struct nlattr *attrs; | |
3266 | struct nlattr *stat; | |
3267 | ||
3268 | /*filter response w.r.t sk_state*/ | |
3269 | if (!(sk_filter_state & (1 << sk->sk_state))) | |
3270 | return 0; | |
3271 | ||
3272 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
3273 | if (!attrs) | |
3274 | goto msg_cancel; | |
3275 | ||
3276 | if (__tipc_nl_add_sk_info(skb, tsk)) | |
3277 | goto attr_msg_cancel; | |
3278 | ||
3279 | if (nla_put_u32(skb, TIPC_NLA_SOCK_TYPE, (u32)sk->sk_type) || | |
3280 | nla_put_u32(skb, TIPC_NLA_SOCK_TIPC_STATE, (u32)sk->sk_state) || | |
3281 | nla_put_u32(skb, TIPC_NLA_SOCK_INO, sock_i_ino(sk)) || | |
3282 | nla_put_u32(skb, TIPC_NLA_SOCK_UID, | |
3283 | from_kuid_munged(sk_user_ns(sk), sock_i_uid(sk))) || | |
3284 | nla_put_u64_64bit(skb, TIPC_NLA_SOCK_COOKIE, | |
3285 | tipc_diag_gen_cookie(sk), | |
3286 | TIPC_NLA_SOCK_PAD)) | |
3287 | goto attr_msg_cancel; | |
3288 | ||
3289 | stat = nla_nest_start(skb, TIPC_NLA_SOCK_STAT); | |
3290 | if (!stat) | |
3291 | goto attr_msg_cancel; | |
3292 | ||
3293 | if (nla_put_u32(skb, TIPC_NLA_SOCK_STAT_RCVQ, | |
3294 | skb_queue_len(&sk->sk_receive_queue)) || | |
3295 | nla_put_u32(skb, TIPC_NLA_SOCK_STAT_SENDQ, | |
872619d8 GM |
3296 | skb_queue_len(&sk->sk_write_queue)) || |
3297 | nla_put_u32(skb, TIPC_NLA_SOCK_STAT_DROP, | |
3298 | atomic_read(&sk->sk_drops))) | |
c30b70de GM |
3299 | goto stat_msg_cancel; |
3300 | ||
3301 | if (tsk->cong_link_cnt && | |
3302 | nla_put_flag(skb, TIPC_NLA_SOCK_STAT_LINK_CONG)) | |
3303 | goto stat_msg_cancel; | |
3304 | ||
3305 | if (tsk_conn_cong(tsk) && | |
3306 | nla_put_flag(skb, TIPC_NLA_SOCK_STAT_CONN_CONG)) | |
3307 | goto stat_msg_cancel; | |
3308 | ||
3309 | nla_nest_end(skb, stat); | |
3310 | nla_nest_end(skb, attrs); | |
3311 | ||
3312 | return 0; | |
3313 | ||
3314 | stat_msg_cancel: | |
3315 | nla_nest_cancel(skb, stat); | |
3316 | attr_msg_cancel: | |
3317 | nla_nest_cancel(skb, attrs); | |
3318 | msg_cancel: | |
3319 | return -EMSGSIZE; | |
3320 | } | |
3321 | EXPORT_SYMBOL(tipc_sk_fill_sock_diag); | |
1a1a143d | 3322 | |
dfde331e GM |
3323 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) |
3324 | { | |
c30b70de | 3325 | return tipc_nl_sk_walk(skb, cb, __tipc_nl_add_sk); |
dfde331e GM |
3326 | } |
3327 | ||
1a1a143d | 3328 | /* Caller should hold socket lock for the passed tipc socket. */ |
d8182804 RA |
3329 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
3330 | struct netlink_callback *cb, | |
3331 | struct publication *publ) | |
1a1a143d RA |
3332 | { |
3333 | void *hdr; | |
3334 | struct nlattr *attrs; | |
3335 | ||
3336 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3337 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
3338 | if (!hdr) |
3339 | goto msg_cancel; | |
3340 | ||
3341 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
3342 | if (!attrs) | |
3343 | goto genlmsg_cancel; | |
3344 | ||
3345 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
3346 | goto attr_msg_cancel; | |
3347 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
3348 | goto attr_msg_cancel; | |
3349 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
3350 | goto attr_msg_cancel; | |
3351 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
3352 | goto attr_msg_cancel; | |
3353 | ||
3354 | nla_nest_end(skb, attrs); | |
3355 | genlmsg_end(skb, hdr); | |
3356 | ||
3357 | return 0; | |
3358 | ||
3359 | attr_msg_cancel: | |
3360 | nla_nest_cancel(skb, attrs); | |
3361 | genlmsg_cancel: | |
3362 | genlmsg_cancel(skb, hdr); | |
3363 | msg_cancel: | |
3364 | return -EMSGSIZE; | |
3365 | } | |
3366 | ||
3367 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3368 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
3369 | struct netlink_callback *cb, | |
3370 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
3371 | { |
3372 | int err; | |
3373 | struct publication *p; | |
3374 | ||
3375 | if (*last_publ) { | |
e50e73e1 | 3376 | list_for_each_entry(p, &tsk->publications, binding_sock) { |
1a1a143d RA |
3377 | if (p->key == *last_publ) |
3378 | break; | |
3379 | } | |
3380 | if (p->key != *last_publ) { | |
3381 | /* We never set seq or call nl_dump_check_consistent() | |
3382 | * this means that setting prev_seq here will cause the | |
3383 | * consistence check to fail in the netlink callback | |
3384 | * handler. Resulting in the last NLMSG_DONE message | |
3385 | * having the NLM_F_DUMP_INTR flag set. | |
3386 | */ | |
3387 | cb->prev_seq = 1; | |
3388 | *last_publ = 0; | |
3389 | return -EPIPE; | |
3390 | } | |
3391 | } else { | |
3392 | p = list_first_entry(&tsk->publications, struct publication, | |
e50e73e1 | 3393 | binding_sock); |
1a1a143d RA |
3394 | } |
3395 | ||
e50e73e1 | 3396 | list_for_each_entry_from(p, &tsk->publications, binding_sock) { |
1a1a143d RA |
3397 | err = __tipc_nl_add_sk_publ(skb, cb, p); |
3398 | if (err) { | |
3399 | *last_publ = p->key; | |
3400 | return err; | |
3401 | } | |
3402 | } | |
3403 | *last_publ = 0; | |
3404 | ||
3405 | return 0; | |
3406 | } | |
3407 | ||
3408 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3409 | { | |
3410 | int err; | |
07f6c4bc | 3411 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
3412 | u32 last_publ = cb->args[1]; |
3413 | u32 done = cb->args[2]; | |
e05b31f4 | 3414 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
3415 | struct tipc_sock *tsk; |
3416 | ||
07f6c4bc | 3417 | if (!tsk_portid) { |
1a1a143d RA |
3418 | struct nlattr **attrs; |
3419 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
3420 | ||
3421 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
3422 | if (err) | |
3423 | return err; | |
3424 | ||
45e093ae RA |
3425 | if (!attrs[TIPC_NLA_SOCK]) |
3426 | return -EINVAL; | |
3427 | ||
1a1a143d RA |
3428 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
3429 | attrs[TIPC_NLA_SOCK], | |
fceb6435 | 3430 | tipc_nl_sock_policy, NULL); |
1a1a143d RA |
3431 | if (err) |
3432 | return err; | |
3433 | ||
3434 | if (!sock[TIPC_NLA_SOCK_REF]) | |
3435 | return -EINVAL; | |
3436 | ||
07f6c4bc | 3437 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
3438 | } |
3439 | ||
3440 | if (done) | |
3441 | return 0; | |
3442 | ||
e05b31f4 | 3443 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
3444 | if (!tsk) |
3445 | return -EINVAL; | |
3446 | ||
3447 | lock_sock(&tsk->sk); | |
3448 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
3449 | if (!err) | |
3450 | done = 1; | |
3451 | release_sock(&tsk->sk); | |
07f6c4bc | 3452 | sock_put(&tsk->sk); |
1a1a143d | 3453 | |
07f6c4bc | 3454 | cb->args[0] = tsk_portid; |
1a1a143d RA |
3455 | cb->args[1] = last_publ; |
3456 | cb->args[2] = done; | |
3457 | ||
3458 | return skb->len; | |
3459 | } |