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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
75da2163 | 4 | * Copyright (c) 2001-2007, 2012-2017, Ericsson AB |
c5fa7b3c | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
07f6c4bc | 37 | #include <linux/rhashtable.h> |
174cd4b1 IM |
38 | #include <linux/sched/signal.h> |
39 | ||
b97bf3fd | 40 | #include "core.h" |
e2dafe87 | 41 | #include "name_table.h" |
78acb1f9 | 42 | #include "node.h" |
e2dafe87 | 43 | #include "link.h" |
c637c103 | 44 | #include "name_distr.h" |
2e84c60b | 45 | #include "socket.h" |
a6bf70f7 | 46 | #include "bcast.h" |
49cc66ea | 47 | #include "netlink.h" |
75da2163 | 48 | #include "group.h" |
b4b9771b | 49 | #include "trace.h" |
2cf8aa19 | 50 | |
67879274 | 51 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
0d5fcebf | 52 | #define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc | 53 | #define TIPC_FWD_MSG 1 |
07f6c4bc YX |
54 | #define TIPC_MAX_PORT 0xffffffff |
55 | #define TIPC_MIN_PORT 1 | |
e9f8b101 | 56 | #define TIPC_ACK_RATE 4 /* ACK at 1/4 of of rcv window size */ |
301bae56 | 57 | |
0c288c86 PB |
58 | enum { |
59 | TIPC_LISTEN = TCP_LISTEN, | |
8ea642ee | 60 | TIPC_ESTABLISHED = TCP_ESTABLISHED, |
438adcaf | 61 | TIPC_OPEN = TCP_CLOSE, |
9fd4b070 | 62 | TIPC_DISCONNECTING = TCP_CLOSE_WAIT, |
99a20889 | 63 | TIPC_CONNECTING = TCP_SYN_SENT, |
0c288c86 PB |
64 | }; |
65 | ||
31c82a2d JM |
66 | struct sockaddr_pair { |
67 | struct sockaddr_tipc sock; | |
68 | struct sockaddr_tipc member; | |
69 | }; | |
70 | ||
301bae56 JPM |
71 | /** |
72 | * struct tipc_sock - TIPC socket structure | |
73 | * @sk: socket - interacts with 'port' and with user via the socket API | |
301bae56 JPM |
74 | * @conn_type: TIPC type used when connection was established |
75 | * @conn_instance: TIPC instance used when connection was established | |
76 | * @published: non-zero if port has one or more associated names | |
77 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
c0bceb97 | 78 | * @maxnagle: maximum size of msg which can be subject to nagle |
07f6c4bc | 79 | * @portid: unique port identity in TIPC socket hash table |
301bae56 | 80 | * @phdr: preformatted message header used when sending messages |
365ad353 | 81 | * #cong_links: list of congested links |
301bae56 | 82 | * @publications: list of publications for port |
365ad353 | 83 | * @blocking_link: address of the congested link we are currently sleeping on |
301bae56 | 84 | * @pub_count: total # of publications port has made during its lifetime |
301bae56 JPM |
85 | * @conn_timeout: the time we can wait for an unresponded setup request |
86 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
365ad353 | 87 | * @cong_link_cnt: number of congested links |
75da2163 | 88 | * @snt_unacked: # messages sent by socket, and not yet acked by peer |
301bae56 | 89 | * @rcv_unacked: # messages read by user, but not yet acked back to peer |
aeda16b6 | 90 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc | 91 | * @node: hash table node |
01fd12bb | 92 | * @mc_method: cookie for use between socket and broadcast layer |
07f6c4bc | 93 | * @rcu: rcu struct for tipc_sock |
301bae56 JPM |
94 | */ |
95 | struct tipc_sock { | |
96 | struct sock sk; | |
301bae56 JPM |
97 | u32 conn_type; |
98 | u32 conn_instance; | |
99 | int published; | |
100 | u32 max_pkt; | |
c0bceb97 | 101 | u32 maxnagle; |
07f6c4bc | 102 | u32 portid; |
301bae56 | 103 | struct tipc_msg phdr; |
365ad353 | 104 | struct list_head cong_links; |
301bae56 JPM |
105 | struct list_head publications; |
106 | u32 pub_count; | |
301bae56 | 107 | atomic_t dupl_rcvcnt; |
67879274 | 108 | u16 conn_timeout; |
8ea642ee | 109 | bool probe_unacked; |
365ad353 | 110 | u16 cong_link_cnt; |
10724cc7 JPM |
111 | u16 snt_unacked; |
112 | u16 snd_win; | |
60020e18 | 113 | u16 peer_caps; |
10724cc7 JPM |
114 | u16 rcv_unacked; |
115 | u16 rcv_win; | |
aeda16b6 | 116 | struct sockaddr_tipc peer; |
07f6c4bc | 117 | struct rhash_head node; |
01fd12bb | 118 | struct tipc_mc_method mc_method; |
07f6c4bc | 119 | struct rcu_head rcu; |
75da2163 | 120 | struct tipc_group *group; |
c0bceb97 JM |
121 | u32 oneway; |
122 | u16 snd_backlog; | |
123 | bool expect_ack; | |
124 | bool nodelay; | |
60c25306 | 125 | bool group_is_open; |
301bae56 | 126 | }; |
b97bf3fd | 127 | |
64ac5f59 | 128 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 129 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 130 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 131 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c | 132 | static int tipc_release(struct socket *sock); |
cdfbabfb DH |
133 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
134 | bool kern); | |
31b102bb | 135 | static void tipc_sk_timeout(struct timer_list *t); |
301bae56 | 136 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 137 | struct tipc_name_seq const *seq); |
301bae56 | 138 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 139 | struct tipc_name_seq const *seq); |
75da2163 | 140 | static int tipc_sk_leave(struct tipc_sock *tsk); |
e05b31f4 | 141 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
142 | static int tipc_sk_insert(struct tipc_sock *tsk); |
143 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
365ad353 | 144 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz); |
39a0295f | 145 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); |
c0bceb97 | 146 | static void tipc_sk_push_backlog(struct tipc_sock *tsk); |
b97bf3fd | 147 | |
bca65eae FW |
148 | static const struct proto_ops packet_ops; |
149 | static const struct proto_ops stream_ops; | |
150 | static const struct proto_ops msg_ops; | |
b97bf3fd | 151 | static struct proto tipc_proto; |
6cca7289 HX |
152 | static const struct rhashtable_params tsk_rht_params; |
153 | ||
c5898636 JPM |
154 | static u32 tsk_own_node(struct tipc_sock *tsk) |
155 | { | |
156 | return msg_prevnode(&tsk->phdr); | |
157 | } | |
158 | ||
301bae56 | 159 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 160 | { |
301bae56 | 161 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
162 | } |
163 | ||
301bae56 | 164 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 165 | { |
301bae56 | 166 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
167 | } |
168 | ||
301bae56 | 169 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 170 | { |
301bae56 | 171 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
172 | } |
173 | ||
301bae56 | 174 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 175 | { |
301bae56 | 176 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
177 | } |
178 | ||
301bae56 | 179 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 180 | { |
301bae56 | 181 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
182 | } |
183 | ||
301bae56 | 184 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 185 | { |
301bae56 | 186 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
187 | } |
188 | ||
301bae56 | 189 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 190 | { |
301bae56 | 191 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
192 | } |
193 | ||
301bae56 | 194 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
195 | { |
196 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
197 | return -EINVAL; | |
301bae56 | 198 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
199 | return 0; |
200 | } | |
8826cde6 | 201 | |
301bae56 JPM |
202 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
203 | { | |
204 | return container_of(sk, struct tipc_sock, sk); | |
205 | } | |
206 | ||
10724cc7 | 207 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 208 | { |
6998cc6e | 209 | return tsk->snt_unacked > tsk->snd_win; |
10724cc7 JPM |
210 | } |
211 | ||
b7d42635 JM |
212 | static u16 tsk_blocks(int len) |
213 | { | |
214 | return ((len / FLOWCTL_BLK_SZ) + 1); | |
215 | } | |
216 | ||
10724cc7 JPM |
217 | /* tsk_blocks(): translate a buffer size in bytes to number of |
218 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
219 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
220 | */ | |
221 | static u16 tsk_adv_blocks(int len) | |
222 | { | |
223 | return len / FLOWCTL_BLK_SZ / 4; | |
224 | } | |
225 | ||
226 | /* tsk_inc(): increment counter for sent or received data | |
227 | * - If block based flow control is not supported by peer we | |
228 | * fall back to message based ditto, incrementing the counter | |
229 | */ | |
230 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
231 | { | |
232 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
233 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
234 | return 1; | |
301bae56 JPM |
235 | } |
236 | ||
c0bceb97 JM |
237 | /* tsk_set_nagle - enable/disable nagle property by manipulating maxnagle |
238 | */ | |
239 | static void tsk_set_nagle(struct tipc_sock *tsk) | |
240 | { | |
241 | struct sock *sk = &tsk->sk; | |
242 | ||
243 | tsk->maxnagle = 0; | |
244 | if (sk->sk_type != SOCK_STREAM) | |
245 | return; | |
246 | if (tsk->nodelay) | |
247 | return; | |
248 | if (!(tsk->peer_caps & TIPC_NAGLE)) | |
249 | return; | |
250 | /* Limit node local buffer size to avoid receive queue overflow */ | |
251 | if (tsk->max_pkt == MAX_MSG_SIZE) | |
252 | tsk->maxnagle = 1500; | |
253 | else | |
254 | tsk->maxnagle = tsk->max_pkt; | |
255 | } | |
256 | ||
0c3141e9 | 257 | /** |
2e84c60b | 258 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
259 | * |
260 | * Caller must hold socket lock | |
b97bf3fd | 261 | */ |
2e84c60b | 262 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 263 | { |
01e661eb | 264 | trace_tipc_sk_advance_rx(sk, NULL, TIPC_DUMP_SK_RCVQ, " "); |
5f6d9123 | 265 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
266 | } |
267 | ||
bcd3ffd4 JPM |
268 | /* tipc_sk_respond() : send response message back to sender |
269 | */ | |
270 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
271 | { | |
272 | u32 selector; | |
273 | u32 dnode; | |
274 | u32 onode = tipc_own_addr(sock_net(sk)); | |
275 | ||
276 | if (!tipc_msg_reverse(onode, &skb, err)) | |
277 | return; | |
278 | ||
01e661eb | 279 | trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_NONE, "@sk_respond!"); |
bcd3ffd4 JPM |
280 | dnode = msg_destnode(buf_msg(skb)); |
281 | selector = msg_origport(buf_msg(skb)); | |
282 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
283 | } | |
284 | ||
b97bf3fd | 285 | /** |
2e84c60b | 286 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
287 | * |
288 | * Caller must hold socket lock | |
b97bf3fd | 289 | */ |
49afb806 | 290 | static void tsk_rej_rx_queue(struct sock *sk, int error) |
b97bf3fd | 291 | { |
a6ca1094 | 292 | struct sk_buff *skb; |
0c3141e9 | 293 | |
bcd3ffd4 | 294 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
49afb806 | 295 | tipc_sk_respond(sk, skb, error); |
b97bf3fd PL |
296 | } |
297 | ||
d6fb7e9c PB |
298 | static bool tipc_sk_connected(struct sock *sk) |
299 | { | |
f40acbaf | 300 | return sk->sk_state == TIPC_ESTABLISHED; |
d6fb7e9c PB |
301 | } |
302 | ||
c752023a PB |
303 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
304 | * @sk: socket | |
305 | * | |
306 | * Returns true if connection less, false otherwise | |
307 | */ | |
308 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
309 | { | |
310 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
311 | } | |
312 | ||
2e84c60b | 313 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
314 | * |
315 | * Handles cases where the node's network address has changed from | |
316 | * the default of <0.0.0> to its configured setting. | |
317 | */ | |
2e84c60b | 318 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 319 | { |
d6fb7e9c | 320 | struct sock *sk = &tsk->sk; |
23fd3eac | 321 | u32 self = tipc_own_addr(sock_net(sk)); |
301bae56 | 322 | u32 peer_port = tsk_peer_port(tsk); |
23fd3eac | 323 | u32 orig_node, peer_node; |
0fc87aae | 324 | |
d6fb7e9c | 325 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
326 | return false; |
327 | ||
328 | if (unlikely(msg_origport(msg) != peer_port)) | |
329 | return false; | |
330 | ||
331 | orig_node = msg_orignode(msg); | |
301bae56 | 332 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
333 | |
334 | if (likely(orig_node == peer_node)) | |
335 | return true; | |
336 | ||
23fd3eac | 337 | if (!orig_node && peer_node == self) |
0fc87aae JPM |
338 | return true; |
339 | ||
23fd3eac | 340 | if (!peer_node && orig_node == self) |
0fc87aae JPM |
341 | return true; |
342 | ||
343 | return false; | |
344 | } | |
345 | ||
0c288c86 PB |
346 | /* tipc_set_sk_state - set the sk_state of the socket |
347 | * @sk: socket | |
348 | * | |
349 | * Caller must hold socket lock | |
350 | * | |
351 | * Returns 0 on success, errno otherwise | |
352 | */ | |
353 | static int tipc_set_sk_state(struct sock *sk, int state) | |
354 | { | |
438adcaf | 355 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
356 | int res = -EINVAL; |
357 | ||
358 | switch (state) { | |
438adcaf PB |
359 | case TIPC_OPEN: |
360 | res = 0; | |
361 | break; | |
0c288c86 | 362 | case TIPC_LISTEN: |
99a20889 | 363 | case TIPC_CONNECTING: |
438adcaf | 364 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
365 | res = 0; |
366 | break; | |
8ea642ee | 367 | case TIPC_ESTABLISHED: |
99a20889 | 368 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 369 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
370 | res = 0; |
371 | break; | |
9fd4b070 | 372 | case TIPC_DISCONNECTING: |
99a20889 | 373 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
374 | oldsk_state == TIPC_ESTABLISHED) |
375 | res = 0; | |
376 | break; | |
0c288c86 PB |
377 | } |
378 | ||
379 | if (!res) | |
380 | sk->sk_state = state; | |
381 | ||
382 | return res; | |
383 | } | |
384 | ||
8c44e1af JPM |
385 | static int tipc_sk_sock_err(struct socket *sock, long *timeout) |
386 | { | |
387 | struct sock *sk = sock->sk; | |
388 | int err = sock_error(sk); | |
389 | int typ = sock->type; | |
390 | ||
391 | if (err) | |
392 | return err; | |
393 | if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { | |
394 | if (sk->sk_state == TIPC_DISCONNECTING) | |
395 | return -EPIPE; | |
396 | else if (!tipc_sk_connected(sk)) | |
397 | return -ENOTCONN; | |
398 | } | |
399 | if (!*timeout) | |
400 | return -EAGAIN; | |
401 | if (signal_pending(current)) | |
402 | return sock_intr_errno(*timeout); | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
844cf763 JPM |
407 | #define tipc_wait_for_cond(sock_, timeo_, condition_) \ |
408 | ({ \ | |
bfd07f3d | 409 | DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ |
844cf763 JPM |
410 | struct sock *sk_; \ |
411 | int rc_; \ | |
412 | \ | |
413 | while ((rc_ = !(condition_))) { \ | |
bfd07f3d TN |
414 | /* coupled with smp_wmb() in tipc_sk_proto_rcv() */ \ |
415 | smp_rmb(); \ | |
844cf763 JPM |
416 | sk_ = (sock_)->sk; \ |
417 | rc_ = tipc_sk_sock_err((sock_), timeo_); \ | |
418 | if (rc_) \ | |
419 | break; \ | |
223b7329 | 420 | add_wait_queue(sk_sleep(sk_), &wait_); \ |
844cf763 JPM |
421 | release_sock(sk_); \ |
422 | *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \ | |
423 | sched_annotate_sleep(); \ | |
424 | lock_sock(sk_); \ | |
425 | remove_wait_queue(sk_sleep(sk_), &wait_); \ | |
426 | } \ | |
427 | rc_; \ | |
8c44e1af JPM |
428 | }) |
429 | ||
b97bf3fd | 430 | /** |
c5fa7b3c | 431 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 432 | * @net: network namespace (must be default network) |
b97bf3fd PL |
433 | * @sock: pre-allocated socket structure |
434 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 435 | * @kern: caused by kernel or by userspace? |
c4307285 | 436 | * |
0c3141e9 AS |
437 | * This routine creates additional data structures used by the TIPC socket, |
438 | * initializes them, and links them together. | |
b97bf3fd PL |
439 | * |
440 | * Returns 0 on success, errno otherwise | |
441 | */ | |
58ed9442 JPM |
442 | static int tipc_sk_create(struct net *net, struct socket *sock, |
443 | int protocol, int kern) | |
b97bf3fd | 444 | { |
0c3141e9 | 445 | const struct proto_ops *ops; |
b97bf3fd | 446 | struct sock *sk; |
58ed9442 | 447 | struct tipc_sock *tsk; |
5b8fa7ce | 448 | struct tipc_msg *msg; |
0c3141e9 AS |
449 | |
450 | /* Validate arguments */ | |
b97bf3fd PL |
451 | if (unlikely(protocol != 0)) |
452 | return -EPROTONOSUPPORT; | |
453 | ||
b97bf3fd PL |
454 | switch (sock->type) { |
455 | case SOCK_STREAM: | |
0c3141e9 | 456 | ops = &stream_ops; |
b97bf3fd PL |
457 | break; |
458 | case SOCK_SEQPACKET: | |
0c3141e9 | 459 | ops = &packet_ops; |
b97bf3fd PL |
460 | break; |
461 | case SOCK_DGRAM: | |
b97bf3fd | 462 | case SOCK_RDM: |
0c3141e9 | 463 | ops = &msg_ops; |
b97bf3fd | 464 | break; |
49978651 | 465 | default: |
49978651 | 466 | return -EPROTOTYPE; |
b97bf3fd PL |
467 | } |
468 | ||
0c3141e9 | 469 | /* Allocate socket's protocol area */ |
11aa9c28 | 470 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 471 | if (sk == NULL) |
b97bf3fd | 472 | return -ENOMEM; |
b97bf3fd | 473 | |
58ed9442 | 474 | tsk = tipc_sk(sk); |
301bae56 | 475 | tsk->max_pkt = MAX_PKT_DEFAULT; |
c0bceb97 | 476 | tsk->maxnagle = 0; |
301bae56 | 477 | INIT_LIST_HEAD(&tsk->publications); |
365ad353 | 478 | INIT_LIST_HEAD(&tsk->cong_links); |
301bae56 | 479 | msg = &tsk->phdr; |
b97bf3fd | 480 | |
0c3141e9 | 481 | /* Finish initializing socket data structures */ |
0c3141e9 | 482 | sock->ops = ops; |
0c3141e9 | 483 | sock_init_data(sock, sk); |
438adcaf | 484 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 485 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 486 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
487 | return -EINVAL; |
488 | } | |
40f9f439 HX |
489 | |
490 | /* Ensure tsk is visible before we read own_addr. */ | |
491 | smp_mb(); | |
492 | ||
23fd3eac JM |
493 | tipc_msg_init(tipc_own_addr(net), msg, TIPC_LOW_IMPORTANCE, |
494 | TIPC_NAMED_MSG, NAMED_H_SIZE, 0); | |
40f9f439 | 495 | |
07f6c4bc | 496 | msg_set_origport(msg, tsk->portid); |
31b102bb | 497 | timer_setup(&sk->sk_timer, tipc_sk_timeout, 0); |
6f00089c | 498 | sk->sk_shutdown = 0; |
64ac5f59 | 499 | sk->sk_backlog_rcv = tipc_sk_backlog_rcv; |
cc79dd1b | 500 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
501 | sk->sk_data_ready = tipc_data_ready; |
502 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 503 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc | 504 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
1b22bcad | 505 | tsk->group_is_open = true; |
4f4482dc | 506 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 507 | |
10724cc7 JPM |
508 | /* Start out with safe limits until we receive an advertised window */ |
509 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
510 | tsk->rcv_win = tsk->snd_win; | |
511 | ||
c752023a | 512 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 513 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 514 | if (sock->type == SOCK_DGRAM) |
301bae56 | 515 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 516 | } |
2948a1fc | 517 | __skb_queue_head_init(&tsk->mc_method.deferredq); |
01e661eb | 518 | trace_tipc_sk_create(sk, NULL, TIPC_DUMP_NONE, " "); |
b97bf3fd PL |
519 | return 0; |
520 | } | |
521 | ||
07f6c4bc YX |
522 | static void tipc_sk_callback(struct rcu_head *head) |
523 | { | |
524 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
525 | ||
526 | sock_put(&tsk->sk); | |
527 | } | |
528 | ||
6f00089c PB |
529 | /* Caller should hold socket lock for the socket. */ |
530 | static void __tipc_shutdown(struct socket *sock, int error) | |
531 | { | |
532 | struct sock *sk = sock->sk; | |
533 | struct tipc_sock *tsk = tipc_sk(sk); | |
534 | struct net *net = sock_net(sk); | |
12db3c80 | 535 | long timeout = msecs_to_jiffies(CONN_TIMEOUT_DEFAULT); |
6f00089c PB |
536 | u32 dnode = tsk_peer_node(tsk); |
537 | struct sk_buff *skb; | |
538 | ||
365ad353 JPM |
539 | /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */ |
540 | tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && | |
541 | !tsk_conn_cong(tsk))); | |
542 | ||
d34910e1 TN |
543 | /* Push out delayed messages if in Nagle mode */ |
544 | tipc_sk_push_backlog(tsk); | |
545 | /* Remove pending SYN */ | |
546 | __skb_queue_purge(&sk->sk_write_queue); | |
67879274 | 547 | |
49afb806 TL |
548 | /* Remove partially received buffer if any */ |
549 | skb = skb_peek(&sk->sk_receive_queue); | |
550 | if (skb && TIPC_SKB_CB(skb)->bytes_read) { | |
551 | __skb_unlink(skb, &sk->sk_receive_queue); | |
552 | kfree_skb(skb); | |
6f00089c | 553 | } |
693c5649 | 554 | |
49afb806 TL |
555 | /* Reject all unreceived messages if connectionless */ |
556 | if (tipc_sk_type_connectionless(sk)) { | |
557 | tsk_rej_rx_queue(sk, error); | |
693c5649 | 558 | return; |
49afb806 | 559 | } |
693c5649 | 560 | |
49afb806 TL |
561 | switch (sk->sk_state) { |
562 | case TIPC_CONNECTING: | |
563 | case TIPC_ESTABLISHED: | |
564 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
565 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
566 | /* Send a FIN+/- to its peer */ | |
567 | skb = __skb_dequeue(&sk->sk_receive_queue); | |
568 | if (skb) { | |
569 | __skb_queue_purge(&sk->sk_receive_queue); | |
570 | tipc_sk_respond(sk, skb, error); | |
571 | break; | |
572 | } | |
6f00089c PB |
573 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
574 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
575 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
576 | tsk->portid, error); | |
577 | if (skb) | |
578 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
49afb806 TL |
579 | break; |
580 | case TIPC_LISTEN: | |
581 | /* Reject all SYN messages */ | |
582 | tsk_rej_rx_queue(sk, error); | |
583 | break; | |
584 | default: | |
585 | __skb_queue_purge(&sk->sk_receive_queue); | |
586 | break; | |
6f00089c PB |
587 | } |
588 | } | |
589 | ||
b97bf3fd | 590 | /** |
247f0f3c | 591 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
592 | * @sock: socket to destroy |
593 | * | |
594 | * This routine cleans up any messages that are still queued on the socket. | |
595 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
596 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
597 | * and any others are discarded. (If the first message on a STREAM socket | |
598 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 599 | * |
b97bf3fd PL |
600 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
601 | * are returned or discarded according to the "destination droppable" setting | |
602 | * specified for the message by the sender. | |
603 | * | |
604 | * Returns 0 on success, errno otherwise | |
605 | */ | |
247f0f3c | 606 | static int tipc_release(struct socket *sock) |
b97bf3fd | 607 | { |
b97bf3fd | 608 | struct sock *sk = sock->sk; |
58ed9442 | 609 | struct tipc_sock *tsk; |
b97bf3fd | 610 | |
0c3141e9 AS |
611 | /* |
612 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
613 | * releases a pre-allocated child socket that was never used) | |
614 | */ | |
0c3141e9 | 615 | if (sk == NULL) |
b97bf3fd | 616 | return 0; |
c4307285 | 617 | |
58ed9442 | 618 | tsk = tipc_sk(sk); |
0c3141e9 AS |
619 | lock_sock(sk); |
620 | ||
01e661eb | 621 | trace_tipc_sk_release(sk, NULL, TIPC_DUMP_ALL, " "); |
6f00089c PB |
622 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
623 | sk->sk_shutdown = SHUTDOWN_MASK; | |
75da2163 | 624 | tipc_sk_leave(tsk); |
301bae56 | 625 | tipc_sk_withdraw(tsk, 0, NULL); |
c55c8eda | 626 | __skb_queue_purge(&tsk->mc_method.deferredq); |
1ea23a21 | 627 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 628 | tipc_sk_remove(tsk); |
b97bf3fd | 629 | |
0a3b8b2b | 630 | sock_orphan(sk); |
0c3141e9 | 631 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 632 | release_sock(sk); |
a80ae530 | 633 | tipc_dest_list_purge(&tsk->cong_links); |
365ad353 | 634 | tsk->cong_link_cnt = 0; |
07f6c4bc | 635 | call_rcu(&tsk->rcu, tipc_sk_callback); |
0c3141e9 | 636 | sock->sk = NULL; |
b97bf3fd | 637 | |
065d7e39 | 638 | return 0; |
b97bf3fd PL |
639 | } |
640 | ||
641 | /** | |
247f0f3c | 642 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
643 | * @sock: socket structure |
644 | * @uaddr: socket address describing name(s) and desired operation | |
645 | * @uaddr_len: size of socket address data structure | |
c4307285 | 646 | * |
b97bf3fd PL |
647 | * Name and name sequence binding is indicated using a positive scope value; |
648 | * a negative scope value unbinds the specified name. Specifying no name | |
649 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 650 | * |
b97bf3fd | 651 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
652 | * |
653 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
654 | * access any non-constant socket information. | |
b97bf3fd | 655 | */ |
247f0f3c YX |
656 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
657 | int uaddr_len) | |
b97bf3fd | 658 | { |
84602761 | 659 | struct sock *sk = sock->sk; |
b97bf3fd | 660 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 661 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 662 | int res = -EINVAL; |
b97bf3fd | 663 | |
84602761 YX |
664 | lock_sock(sk); |
665 | if (unlikely(!uaddr_len)) { | |
301bae56 | 666 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
667 | goto exit; |
668 | } | |
75da2163 JM |
669 | if (tsk->group) { |
670 | res = -EACCES; | |
671 | goto exit; | |
672 | } | |
84602761 YX |
673 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
674 | res = -EINVAL; | |
675 | goto exit; | |
676 | } | |
677 | if (addr->family != AF_TIPC) { | |
678 | res = -EAFNOSUPPORT; | |
679 | goto exit; | |
680 | } | |
b97bf3fd | 681 | |
b97bf3fd PL |
682 | if (addr->addrtype == TIPC_ADDR_NAME) |
683 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
684 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
685 | res = -EAFNOSUPPORT; | |
686 | goto exit; | |
687 | } | |
c4307285 | 688 | |
13a2e898 | 689 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 690 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
691 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
692 | res = -EACCES; | |
693 | goto exit; | |
694 | } | |
c422f1bd | 695 | |
928df188 | 696 | res = (addr->scope >= 0) ? |
301bae56 JPM |
697 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
698 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
699 | exit: |
700 | release_sock(sk); | |
701 | return res; | |
b97bf3fd PL |
702 | } |
703 | ||
c4307285 | 704 | /** |
247f0f3c | 705 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
706 | * @sock: socket structure |
707 | * @uaddr: area for returned socket address | |
708 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 709 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 710 | * |
b97bf3fd | 711 | * Returns 0 on success, errno otherwise |
0c3141e9 | 712 | * |
2da59918 AS |
713 | * NOTE: This routine doesn't need to take the socket lock since it only |
714 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 715 | * a completely predictable manner). |
b97bf3fd | 716 | */ |
247f0f3c | 717 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
9b2c45d4 | 718 | int peer) |
b97bf3fd | 719 | { |
b97bf3fd | 720 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
721 | struct sock *sk = sock->sk; |
722 | struct tipc_sock *tsk = tipc_sk(sk); | |
b97bf3fd | 723 | |
88f8a5e3 | 724 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 725 | if (peer) { |
f40acbaf | 726 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 727 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 728 | return -ENOTCONN; |
301bae56 JPM |
729 | addr->addr.id.ref = tsk_peer_port(tsk); |
730 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 731 | } else { |
07f6c4bc | 732 | addr->addr.id.ref = tsk->portid; |
23fd3eac | 733 | addr->addr.id.node = tipc_own_addr(sock_net(sk)); |
0c3141e9 | 734 | } |
b97bf3fd | 735 | |
b97bf3fd PL |
736 | addr->addrtype = TIPC_ADDR_ID; |
737 | addr->family = AF_TIPC; | |
738 | addr->scope = 0; | |
b97bf3fd PL |
739 | addr->addr.name.domain = 0; |
740 | ||
9b2c45d4 | 741 | return sizeof(*addr); |
b97bf3fd PL |
742 | } |
743 | ||
744 | /** | |
a11e1d43 | 745 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
746 | * @file: file structure associated with the socket |
747 | * @sock: socket for which to calculate the poll bits | |
a11e1d43 | 748 | * @wait: ??? |
b97bf3fd | 749 | * |
9b674e82 AS |
750 | * Returns pollmask value |
751 | * | |
752 | * COMMENTARY: | |
753 | * It appears that the usual socket locking mechanisms are not useful here | |
754 | * since the pollmask info is potentially out-of-date the moment this routine | |
755 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
756 | * to handle any preventable race conditions, so TIPC will do the same ... | |
757 | * | |
f662c070 AS |
758 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
759 | * imply that the operation will succeed, merely that it should be performed | |
760 | * and will not block. | |
b97bf3fd | 761 | */ |
a11e1d43 LT |
762 | static __poll_t tipc_poll(struct file *file, struct socket *sock, |
763 | poll_table *wait) | |
b97bf3fd | 764 | { |
9b674e82 | 765 | struct sock *sk = sock->sk; |
58ed9442 | 766 | struct tipc_sock *tsk = tipc_sk(sk); |
ade994f4 | 767 | __poll_t revents = 0; |
9b674e82 | 768 | |
89ab066d | 769 | sock_poll_wait(file, sock, wait); |
01e661eb | 770 | trace_tipc_sk_poll(sk, NULL, TIPC_DUMP_ALL, " "); |
a11e1d43 | 771 | |
6f00089c | 772 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
a9a08845 | 773 | revents |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM; |
6f00089c | 774 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
a9a08845 | 775 | revents |= EPOLLHUP; |
6f00089c | 776 | |
f40acbaf PB |
777 | switch (sk->sk_state) { |
778 | case TIPC_ESTABLISHED: | |
365ad353 | 779 | if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk)) |
a9a08845 | 780 | revents |= EPOLLOUT; |
f79e3365 | 781 | /* fall through */ |
f40acbaf | 782 | case TIPC_LISTEN: |
ff946833 | 783 | case TIPC_CONNECTING: |
3ef7cf57 | 784 | if (!skb_queue_empty_lockless(&sk->sk_receive_queue)) |
a9a08845 | 785 | revents |= EPOLLIN | EPOLLRDNORM; |
f40acbaf PB |
786 | break; |
787 | case TIPC_OPEN: | |
60c25306 | 788 | if (tsk->group_is_open && !tsk->cong_link_cnt) |
a9a08845 | 789 | revents |= EPOLLOUT; |
ae236fb2 JM |
790 | if (!tipc_sk_type_connectionless(sk)) |
791 | break; | |
3ef7cf57 | 792 | if (skb_queue_empty_lockless(&sk->sk_receive_queue)) |
ae236fb2 | 793 | break; |
a9a08845 | 794 | revents |= EPOLLIN | EPOLLRDNORM; |
f40acbaf PB |
795 | break; |
796 | case TIPC_DISCONNECTING: | |
a9a08845 | 797 | revents = EPOLLIN | EPOLLRDNORM | EPOLLHUP; |
f40acbaf | 798 | break; |
f662c070 | 799 | } |
ae236fb2 | 800 | return revents; |
b97bf3fd PL |
801 | } |
802 | ||
0abd8ff2 JPM |
803 | /** |
804 | * tipc_sendmcast - send multicast message | |
805 | * @sock: socket structure | |
806 | * @seq: destination address | |
562640f3 | 807 | * @msg: message to send |
365ad353 JPM |
808 | * @dlen: length of data to send |
809 | * @timeout: timeout to wait for wakeup | |
0abd8ff2 JPM |
810 | * |
811 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
812 | * Returns the number of bytes sent on success, or errno | |
813 | */ | |
814 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
365ad353 | 815 | struct msghdr *msg, size_t dlen, long timeout) |
0abd8ff2 JPM |
816 | { |
817 | struct sock *sk = sock->sk; | |
c5898636 | 818 | struct tipc_sock *tsk = tipc_sk(sk); |
365ad353 | 819 | struct tipc_msg *hdr = &tsk->phdr; |
f2f9800d | 820 | struct net *net = sock_net(sk); |
365ad353 | 821 | int mtu = tipc_bcast_get_mtu(net); |
01fd12bb | 822 | struct tipc_mc_method *method = &tsk->mc_method; |
365ad353 | 823 | struct sk_buff_head pkts; |
a853e4c6 | 824 | struct tipc_nlist dsts; |
0abd8ff2 JPM |
825 | int rc; |
826 | ||
75da2163 JM |
827 | if (tsk->group) |
828 | return -EACCES; | |
829 | ||
a853e4c6 | 830 | /* Block or return if any destination link is congested */ |
365ad353 JPM |
831 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); |
832 | if (unlikely(rc)) | |
833 | return rc; | |
f214fc40 | 834 | |
a853e4c6 JPM |
835 | /* Lookup destination nodes */ |
836 | tipc_nlist_init(&dsts, tipc_own_addr(net)); | |
837 | tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower, | |
e9a03445 | 838 | seq->upper, &dsts); |
a853e4c6 JPM |
839 | if (!dsts.local && !dsts.remote) |
840 | return -EHOSTUNREACH; | |
841 | ||
842 | /* Build message header */ | |
365ad353 | 843 | msg_set_type(hdr, TIPC_MCAST_MSG); |
a853e4c6 | 844 | msg_set_hdr_sz(hdr, MCAST_H_SIZE); |
365ad353 JPM |
845 | msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); |
846 | msg_set_destport(hdr, 0); | |
847 | msg_set_destnode(hdr, 0); | |
848 | msg_set_nametype(hdr, seq->type); | |
849 | msg_set_namelower(hdr, seq->lower); | |
850 | msg_set_nameupper(hdr, seq->upper); | |
365ad353 | 851 | |
a853e4c6 | 852 | /* Build message as chain of buffers */ |
e654f9f5 | 853 | __skb_queue_head_init(&pkts); |
365ad353 | 854 | rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); |
0abd8ff2 | 855 | |
a853e4c6 | 856 | /* Send message if build was successful */ |
01e661eb TL |
857 | if (unlikely(rc == dlen)) { |
858 | trace_tipc_sk_sendmcast(sk, skb_peek(&pkts), | |
859 | TIPC_DUMP_SK_SNDQ, " "); | |
01fd12bb | 860 | rc = tipc_mcast_xmit(net, &pkts, method, &dsts, |
a853e4c6 | 861 | &tsk->cong_link_cnt); |
01e661eb | 862 | } |
a853e4c6 JPM |
863 | |
864 | tipc_nlist_purge(&dsts); | |
365ad353 JPM |
865 | |
866 | return rc ? rc : dlen; | |
0abd8ff2 JPM |
867 | } |
868 | ||
27bd9ec0 JM |
869 | /** |
870 | * tipc_send_group_msg - send a message to a member in the group | |
871 | * @net: network namespace | |
872 | * @m: message to send | |
873 | * @mb: group member | |
874 | * @dnode: destination node | |
875 | * @dport: destination port | |
876 | * @dlen: total length of message data | |
877 | */ | |
878 | static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk, | |
879 | struct msghdr *m, struct tipc_member *mb, | |
880 | u32 dnode, u32 dport, int dlen) | |
881 | { | |
b87a5ea3 | 882 | u16 bc_snd_nxt = tipc_group_bc_snd_nxt(tsk->group); |
2f487712 | 883 | struct tipc_mc_method *method = &tsk->mc_method; |
27bd9ec0 JM |
884 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); |
885 | struct tipc_msg *hdr = &tsk->phdr; | |
886 | struct sk_buff_head pkts; | |
887 | int mtu, rc; | |
888 | ||
889 | /* Complete message header */ | |
890 | msg_set_type(hdr, TIPC_GRP_UCAST_MSG); | |
891 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); | |
892 | msg_set_destport(hdr, dport); | |
893 | msg_set_destnode(hdr, dnode); | |
b87a5ea3 | 894 | msg_set_grp_bc_seqno(hdr, bc_snd_nxt); |
27bd9ec0 JM |
895 | |
896 | /* Build message as chain of buffers */ | |
e654f9f5 | 897 | __skb_queue_head_init(&pkts); |
f73b1281 | 898 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid, false); |
27bd9ec0 JM |
899 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
900 | if (unlikely(rc != dlen)) | |
901 | return rc; | |
902 | ||
903 | /* Send message */ | |
904 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
905 | if (unlikely(rc == -ELINKCONG)) { | |
906 | tipc_dest_push(&tsk->cong_links, dnode, 0); | |
907 | tsk->cong_link_cnt++; | |
908 | } | |
909 | ||
2f487712 | 910 | /* Update send window */ |
27bd9ec0 JM |
911 | tipc_group_update_member(mb, blks); |
912 | ||
2f487712 JM |
913 | /* A broadcast sent within next EXPIRE period must follow same path */ |
914 | method->rcast = true; | |
915 | method->mandatory = true; | |
27bd9ec0 JM |
916 | return dlen; |
917 | } | |
918 | ||
919 | /** | |
920 | * tipc_send_group_unicast - send message to a member in the group | |
921 | * @sock: socket structure | |
922 | * @m: message to send | |
923 | * @dlen: total length of message data | |
924 | * @timeout: timeout to wait for wakeup | |
925 | * | |
926 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
927 | * Returns the number of bytes sent on success, or errno | |
928 | */ | |
929 | static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m, | |
930 | int dlen, long timeout) | |
931 | { | |
932 | struct sock *sk = sock->sk; | |
933 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
934 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
935 | struct tipc_sock *tsk = tipc_sk(sk); | |
27bd9ec0 JM |
936 | struct net *net = sock_net(sk); |
937 | struct tipc_member *mb = NULL; | |
938 | u32 node, port; | |
939 | int rc; | |
940 | ||
941 | node = dest->addr.id.node; | |
942 | port = dest->addr.id.ref; | |
943 | if (!port && !node) | |
944 | return -EHOSTUNREACH; | |
945 | ||
946 | /* Block or return if destination link or member is congested */ | |
947 | rc = tipc_wait_for_cond(sock, &timeout, | |
948 | !tipc_dest_find(&tsk->cong_links, node, 0) && | |
143ece65 CW |
949 | tsk->group && |
950 | !tipc_group_cong(tsk->group, node, port, blks, | |
951 | &mb)); | |
27bd9ec0 JM |
952 | if (unlikely(rc)) |
953 | return rc; | |
954 | ||
955 | if (unlikely(!mb)) | |
956 | return -EHOSTUNREACH; | |
957 | ||
958 | rc = tipc_send_group_msg(net, tsk, m, mb, node, port, dlen); | |
959 | ||
960 | return rc ? rc : dlen; | |
961 | } | |
962 | ||
ee106d7f JM |
963 | /** |
964 | * tipc_send_group_anycast - send message to any member with given identity | |
965 | * @sock: socket structure | |
966 | * @m: message to send | |
967 | * @dlen: total length of message data | |
968 | * @timeout: timeout to wait for wakeup | |
969 | * | |
970 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
971 | * Returns the number of bytes sent on success, or errno | |
972 | */ | |
973 | static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m, | |
974 | int dlen, long timeout) | |
975 | { | |
976 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
977 | struct sock *sk = sock->sk; | |
978 | struct tipc_sock *tsk = tipc_sk(sk); | |
979 | struct list_head *cong_links = &tsk->cong_links; | |
980 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
232d07b7 | 981 | struct tipc_msg *hdr = &tsk->phdr; |
ee106d7f JM |
982 | struct tipc_member *first = NULL; |
983 | struct tipc_member *mbr = NULL; | |
984 | struct net *net = sock_net(sk); | |
985 | u32 node, port, exclude; | |
ee106d7f | 986 | struct list_head dsts; |
232d07b7 | 987 | u32 type, inst, scope; |
ee106d7f JM |
988 | int lookups = 0; |
989 | int dstcnt, rc; | |
990 | bool cong; | |
991 | ||
992 | INIT_LIST_HEAD(&dsts); | |
993 | ||
232d07b7 | 994 | type = msg_nametype(hdr); |
ee106d7f | 995 | inst = dest->addr.name.name.instance; |
232d07b7 | 996 | scope = msg_lookup_scope(hdr); |
ee106d7f JM |
997 | |
998 | while (++lookups < 4) { | |
143ece65 CW |
999 | exclude = tipc_group_exclude(tsk->group); |
1000 | ||
ee106d7f JM |
1001 | first = NULL; |
1002 | ||
1003 | /* Look for a non-congested destination member, if any */ | |
1004 | while (1) { | |
232d07b7 | 1005 | if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts, |
ee106d7f JM |
1006 | &dstcnt, exclude, false)) |
1007 | return -EHOSTUNREACH; | |
1008 | tipc_dest_pop(&dsts, &node, &port); | |
143ece65 CW |
1009 | cong = tipc_group_cong(tsk->group, node, port, blks, |
1010 | &mbr); | |
ee106d7f JM |
1011 | if (!cong) |
1012 | break; | |
1013 | if (mbr == first) | |
1014 | break; | |
1015 | if (!first) | |
1016 | first = mbr; | |
1017 | } | |
1018 | ||
1019 | /* Start over if destination was not in member list */ | |
1020 | if (unlikely(!mbr)) | |
1021 | continue; | |
1022 | ||
1023 | if (likely(!cong && !tipc_dest_find(cong_links, node, 0))) | |
1024 | break; | |
1025 | ||
1026 | /* Block or return if destination link or member is congested */ | |
1027 | rc = tipc_wait_for_cond(sock, &timeout, | |
1028 | !tipc_dest_find(cong_links, node, 0) && | |
143ece65 CW |
1029 | tsk->group && |
1030 | !tipc_group_cong(tsk->group, node, port, | |
ee106d7f JM |
1031 | blks, &mbr)); |
1032 | if (unlikely(rc)) | |
1033 | return rc; | |
1034 | ||
1035 | /* Send, unless destination disappeared while waiting */ | |
1036 | if (likely(mbr)) | |
1037 | break; | |
1038 | } | |
1039 | ||
1040 | if (unlikely(lookups >= 4)) | |
1041 | return -EHOSTUNREACH; | |
1042 | ||
1043 | rc = tipc_send_group_msg(net, tsk, m, mbr, node, port, dlen); | |
1044 | ||
1045 | return rc ? rc : dlen; | |
1046 | } | |
1047 | ||
75da2163 JM |
1048 | /** |
1049 | * tipc_send_group_bcast - send message to all members in communication group | |
1050 | * @sk: socket structure | |
1051 | * @m: message to send | |
1052 | * @dlen: total length of message data | |
1053 | * @timeout: timeout to wait for wakeup | |
1054 | * | |
1055 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
1056 | * Returns the number of bytes sent on success, or errno | |
1057 | */ | |
1058 | static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m, | |
1059 | int dlen, long timeout) | |
1060 | { | |
5b8dddb6 | 1061 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
75da2163 JM |
1062 | struct sock *sk = sock->sk; |
1063 | struct net *net = sock_net(sk); | |
1064 | struct tipc_sock *tsk = tipc_sk(sk); | |
3c6306d4 | 1065 | struct tipc_nlist *dsts; |
75da2163 | 1066 | struct tipc_mc_method *method = &tsk->mc_method; |
2f487712 | 1067 | bool ack = method->mandatory && method->rcast; |
b7d42635 | 1068 | int blks = tsk_blocks(MCAST_H_SIZE + dlen); |
75da2163 JM |
1069 | struct tipc_msg *hdr = &tsk->phdr; |
1070 | int mtu = tipc_bcast_get_mtu(net); | |
1071 | struct sk_buff_head pkts; | |
1072 | int rc = -EHOSTUNREACH; | |
1073 | ||
b7d42635 | 1074 | /* Block or return if any destination link or member is congested */ |
143ece65 CW |
1075 | rc = tipc_wait_for_cond(sock, &timeout, |
1076 | !tsk->cong_link_cnt && tsk->group && | |
1077 | !tipc_group_bc_cong(tsk->group, blks)); | |
75da2163 JM |
1078 | if (unlikely(rc)) |
1079 | return rc; | |
1080 | ||
3c6306d4 CW |
1081 | dsts = tipc_group_dests(tsk->group); |
1082 | if (!dsts->local && !dsts->remote) | |
1083 | return -EHOSTUNREACH; | |
1084 | ||
75da2163 | 1085 | /* Complete message header */ |
5b8dddb6 JM |
1086 | if (dest) { |
1087 | msg_set_type(hdr, TIPC_GRP_MCAST_MSG); | |
1088 | msg_set_nameinst(hdr, dest->addr.name.name.instance); | |
1089 | } else { | |
1090 | msg_set_type(hdr, TIPC_GRP_BCAST_MSG); | |
1091 | msg_set_nameinst(hdr, 0); | |
1092 | } | |
b7d42635 | 1093 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); |
75da2163 JM |
1094 | msg_set_destport(hdr, 0); |
1095 | msg_set_destnode(hdr, 0); | |
143ece65 | 1096 | msg_set_grp_bc_seqno(hdr, tipc_group_bc_snd_nxt(tsk->group)); |
75da2163 | 1097 | |
2f487712 JM |
1098 | /* Avoid getting stuck with repeated forced replicasts */ |
1099 | msg_set_grp_bc_ack_req(hdr, ack); | |
1100 | ||
75da2163 | 1101 | /* Build message as chain of buffers */ |
e654f9f5 | 1102 | __skb_queue_head_init(&pkts); |
75da2163 JM |
1103 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
1104 | if (unlikely(rc != dlen)) | |
1105 | return rc; | |
1106 | ||
1107 | /* Send message */ | |
2f487712 | 1108 | rc = tipc_mcast_xmit(net, &pkts, method, dsts, &tsk->cong_link_cnt); |
75da2163 JM |
1109 | if (unlikely(rc)) |
1110 | return rc; | |
1111 | ||
b7d42635 | 1112 | /* Update broadcast sequence number and send windows */ |
2f487712 JM |
1113 | tipc_group_update_bc_members(tsk->group, blks, ack); |
1114 | ||
1115 | /* Broadcast link is now free to choose method for next broadcast */ | |
1116 | method->mandatory = false; | |
1117 | method->expires = jiffies; | |
1118 | ||
75da2163 JM |
1119 | return dlen; |
1120 | } | |
1121 | ||
5b8dddb6 JM |
1122 | /** |
1123 | * tipc_send_group_mcast - send message to all members with given identity | |
1124 | * @sock: socket structure | |
1125 | * @m: message to send | |
1126 | * @dlen: total length of message data | |
1127 | * @timeout: timeout to wait for wakeup | |
1128 | * | |
1129 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
1130 | * Returns the number of bytes sent on success, or errno | |
1131 | */ | |
1132 | static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m, | |
1133 | int dlen, long timeout) | |
1134 | { | |
1135 | struct sock *sk = sock->sk; | |
1136 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
5b8dddb6 JM |
1137 | struct tipc_sock *tsk = tipc_sk(sk); |
1138 | struct tipc_group *grp = tsk->group; | |
232d07b7 | 1139 | struct tipc_msg *hdr = &tsk->phdr; |
5b8dddb6 | 1140 | struct net *net = sock_net(sk); |
232d07b7 | 1141 | u32 type, inst, scope, exclude; |
5b8dddb6 | 1142 | struct list_head dsts; |
232d07b7 | 1143 | u32 dstcnt; |
5b8dddb6 JM |
1144 | |
1145 | INIT_LIST_HEAD(&dsts); | |
1146 | ||
232d07b7 JM |
1147 | type = msg_nametype(hdr); |
1148 | inst = dest->addr.name.name.instance; | |
1149 | scope = msg_lookup_scope(hdr); | |
5b8dddb6 | 1150 | exclude = tipc_group_exclude(grp); |
232d07b7 JM |
1151 | |
1152 | if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts, | |
1153 | &dstcnt, exclude, true)) | |
5b8dddb6 JM |
1154 | return -EHOSTUNREACH; |
1155 | ||
1156 | if (dstcnt == 1) { | |
1157 | tipc_dest_pop(&dsts, &dest->addr.id.node, &dest->addr.id.ref); | |
1158 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
1159 | } | |
1160 | ||
1161 | tipc_dest_list_purge(&dsts); | |
1162 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
1163 | } | |
1164 | ||
cb1b7280 JPM |
1165 | /** |
1166 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
1167 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
1168 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
1169 | * | |
1170 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 1171 | */ |
cb1b7280 JPM |
1172 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
1173 | struct sk_buff_head *inputq) | |
078bec82 | 1174 | { |
75da2163 | 1175 | u32 self = tipc_own_addr(net); |
232d07b7 | 1176 | u32 type, lower, upper, scope; |
cb1b7280 | 1177 | struct sk_buff *skb, *_skb; |
b053fcc4 | 1178 | u32 portid, onode; |
232d07b7 | 1179 | struct sk_buff_head tmpq; |
75da2163 | 1180 | struct list_head dports; |
232d07b7 JM |
1181 | struct tipc_msg *hdr; |
1182 | int user, mtyp, hlen; | |
1183 | bool exact; | |
3c724acd | 1184 | |
cb1b7280 | 1185 | __skb_queue_head_init(&tmpq); |
4d8642d8 | 1186 | INIT_LIST_HEAD(&dports); |
078bec82 | 1187 | |
cb1b7280 JPM |
1188 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
1189 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
232d07b7 JM |
1190 | hdr = buf_msg(skb); |
1191 | user = msg_user(hdr); | |
1192 | mtyp = msg_type(hdr); | |
1193 | hlen = skb_headroom(skb) + msg_hdr_sz(hdr); | |
232d07b7 JM |
1194 | onode = msg_orignode(hdr); |
1195 | type = msg_nametype(hdr); | |
1196 | ||
2f487712 JM |
1197 | if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) { |
1198 | spin_lock_bh(&inputq->lock); | |
1199 | if (skb_peek(arrvq) == skb) { | |
1200 | __skb_dequeue(arrvq); | |
1201 | __skb_queue_tail(inputq, skb); | |
1202 | } | |
c545a945 | 1203 | kfree_skb(skb); |
2f487712 JM |
1204 | spin_unlock_bh(&inputq->lock); |
1205 | continue; | |
1206 | } | |
232d07b7 JM |
1207 | |
1208 | /* Group messages require exact scope match */ | |
1209 | if (msg_in_group(hdr)) { | |
1210 | lower = 0; | |
1211 | upper = ~0; | |
1212 | scope = msg_lookup_scope(hdr); | |
1213 | exact = true; | |
1214 | } else { | |
1215 | /* TIPC_NODE_SCOPE means "any scope" in this context */ | |
1216 | if (onode == self) | |
1217 | scope = TIPC_NODE_SCOPE; | |
1218 | else | |
1219 | scope = TIPC_CLUSTER_SCOPE; | |
1220 | exact = false; | |
1221 | lower = msg_namelower(hdr); | |
1222 | upper = msg_nameupper(hdr); | |
75da2163 | 1223 | } |
232d07b7 JM |
1224 | |
1225 | /* Create destination port list: */ | |
1226 | tipc_nametbl_mc_lookup(net, type, lower, upper, | |
1227 | scope, exact, &dports); | |
1228 | ||
1229 | /* Clone message per destination */ | |
a80ae530 | 1230 | while (tipc_dest_pop(&dports, NULL, &portid)) { |
232d07b7 | 1231 | _skb = __pskb_copy(skb, hlen, GFP_ATOMIC); |
cb1b7280 JPM |
1232 | if (_skb) { |
1233 | msg_set_destport(buf_msg(_skb), portid); | |
1234 | __skb_queue_tail(&tmpq, _skb); | |
1235 | continue; | |
1236 | } | |
1237 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 1238 | } |
cb1b7280 JPM |
1239 | /* Append to inputq if not already done by other thread */ |
1240 | spin_lock_bh(&inputq->lock); | |
1241 | if (skb_peek(arrvq) == skb) { | |
1242 | skb_queue_splice_tail_init(&tmpq, inputq); | |
1243 | kfree_skb(__skb_dequeue(arrvq)); | |
1244 | } | |
1245 | spin_unlock_bh(&inputq->lock); | |
1246 | __skb_queue_purge(&tmpq); | |
1247 | kfree_skb(skb); | |
078bec82 | 1248 | } |
cb1b7280 | 1249 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
1250 | } |
1251 | ||
c0bceb97 JM |
1252 | /* tipc_sk_push_backlog(): send accumulated buffers in socket write queue |
1253 | * when socket is in Nagle mode | |
1254 | */ | |
1255 | static void tipc_sk_push_backlog(struct tipc_sock *tsk) | |
1256 | { | |
1257 | struct sk_buff_head *txq = &tsk->sk.sk_write_queue; | |
1258 | struct net *net = sock_net(&tsk->sk); | |
1259 | u32 dnode = tsk_peer_node(tsk); | |
d34910e1 | 1260 | struct sk_buff *skb = skb_peek(txq); |
c0bceb97 JM |
1261 | int rc; |
1262 | ||
d34910e1 TN |
1263 | if (!skb || tsk->cong_link_cnt) |
1264 | return; | |
1265 | ||
1266 | /* Do not send SYN again after congestion */ | |
1267 | if (msg_is_syn(buf_msg(skb))) | |
c0bceb97 JM |
1268 | return; |
1269 | ||
1270 | tsk->snt_unacked += tsk->snd_backlog; | |
1271 | tsk->snd_backlog = 0; | |
1272 | tsk->expect_ack = true; | |
1273 | rc = tipc_node_xmit(net, txq, dnode, tsk->portid); | |
1274 | if (rc == -ELINKCONG) | |
1275 | tsk->cong_link_cnt = 1; | |
1276 | } | |
1277 | ||
ac0074ee | 1278 | /** |
64ac5f59 | 1279 | * tipc_sk_conn_proto_rcv - receive a connection mng protocol message |
ac0074ee | 1280 | * @tsk: receiving socket |
bcd3ffd4 | 1281 | * @skb: pointer to message buffer. |
ac0074ee | 1282 | */ |
64ac5f59 | 1283 | static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
e7eb0582 | 1284 | struct sk_buff_head *inputq, |
64ac5f59 | 1285 | struct sk_buff_head *xmitq) |
ac0074ee | 1286 | { |
bcd3ffd4 | 1287 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
1288 | u32 onode = tsk_own_node(tsk); |
1289 | struct sock *sk = &tsk->sk; | |
bcd3ffd4 | 1290 | int mtyp = msg_type(hdr); |
c0bceb97 | 1291 | bool was_cong; |
bcd3ffd4 | 1292 | |
ac0074ee | 1293 | /* Ignore if connection cannot be validated: */ |
01e661eb TL |
1294 | if (!tsk_peer_msg(tsk, hdr)) { |
1295 | trace_tipc_sk_drop_msg(sk, skb, TIPC_DUMP_NONE, "@proto_rcv!"); | |
ac0074ee | 1296 | goto exit; |
01e661eb | 1297 | } |
ac0074ee | 1298 | |
c1be7756 PB |
1299 | if (unlikely(msg_errcode(hdr))) { |
1300 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1301 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
1302 | tsk_peer_port(tsk)); | |
1303 | sk->sk_state_change(sk); | |
e7eb0582 PB |
1304 | |
1305 | /* State change is ignored if socket already awake, | |
1306 | * - convert msg to abort msg and add to inqueue | |
1307 | */ | |
1308 | msg_set_user(hdr, TIPC_CRITICAL_IMPORTANCE); | |
1309 | msg_set_type(hdr, TIPC_CONN_MSG); | |
1310 | msg_set_size(hdr, BASIC_H_SIZE); | |
1311 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); | |
1312 | __skb_queue_tail(inputq, skb); | |
1313 | return; | |
c1be7756 PB |
1314 | } |
1315 | ||
8ea642ee | 1316 | tsk->probe_unacked = false; |
ac0074ee | 1317 | |
bcd3ffd4 JPM |
1318 | if (mtyp == CONN_PROBE) { |
1319 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
1320 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
1321 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
1322 | return; |
1323 | } else if (mtyp == CONN_ACK) { | |
c0bceb97 JM |
1324 | was_cong = tsk_conn_cong(tsk); |
1325 | tsk->expect_ack = false; | |
1326 | tipc_sk_push_backlog(tsk); | |
10724cc7 JPM |
1327 | tsk->snt_unacked -= msg_conn_ack(hdr); |
1328 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
1329 | tsk->snd_win = msg_adv_win(hdr); | |
c0bceb97 | 1330 | if (was_cong && !tsk_conn_cong(tsk)) |
bcd3ffd4 JPM |
1331 | sk->sk_write_space(sk); |
1332 | } else if (mtyp != CONN_PROBE_REPLY) { | |
1333 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 1334 | } |
ac0074ee | 1335 | exit: |
bcd3ffd4 | 1336 | kfree_skb(skb); |
ac0074ee JPM |
1337 | } |
1338 | ||
b97bf3fd | 1339 | /** |
247f0f3c | 1340 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
1341 | * @sock: socket structure |
1342 | * @m: message to send | |
e2dafe87 | 1343 | * @dsz: amount of user data to be sent |
c4307285 | 1344 | * |
b97bf3fd | 1345 | * Message must have an destination specified explicitly. |
c4307285 | 1346 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
1347 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
1348 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 1349 | * |
b97bf3fd PL |
1350 | * Returns the number of bytes sent on success, or errno otherwise |
1351 | */ | |
1b784140 | 1352 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 1353 | struct msghdr *m, size_t dsz) |
39a0295f YX |
1354 | { |
1355 | struct sock *sk = sock->sk; | |
1356 | int ret; | |
1357 | ||
1358 | lock_sock(sk); | |
1359 | ret = __tipc_sendmsg(sock, m, dsz); | |
1360 | release_sock(sk); | |
1361 | ||
1362 | return ret; | |
1363 | } | |
1364 | ||
365ad353 | 1365 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1366 | { |
0c3141e9 | 1367 | struct sock *sk = sock->sk; |
f2f9800d | 1368 | struct net *net = sock_net(sk); |
365ad353 JPM |
1369 | struct tipc_sock *tsk = tipc_sk(sk); |
1370 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
1371 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); | |
1372 | struct list_head *clinks = &tsk->cong_links; | |
1373 | bool syn = !tipc_sk_type_connectionless(sk); | |
75da2163 | 1374 | struct tipc_group *grp = tsk->group; |
365ad353 | 1375 | struct tipc_msg *hdr = &tsk->phdr; |
f2f8036e | 1376 | struct tipc_name_seq *seq; |
365ad353 | 1377 | struct sk_buff_head pkts; |
abc9b4e0 TL |
1378 | u32 dport = 0, dnode = 0; |
1379 | u32 type = 0, inst = 0; | |
365ad353 | 1380 | int mtu, rc; |
b97bf3fd | 1381 | |
365ad353 | 1382 | if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE)) |
c29c3f70 | 1383 | return -EMSGSIZE; |
365ad353 | 1384 | |
27bd9ec0 JM |
1385 | if (likely(dest)) { |
1386 | if (unlikely(m->msg_namelen < sizeof(*dest))) | |
1387 | return -EINVAL; | |
1388 | if (unlikely(dest->family != AF_TIPC)) | |
1389 | return -EINVAL; | |
1390 | } | |
1391 | ||
1392 | if (grp) { | |
1393 | if (!dest) | |
1394 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
ee106d7f JM |
1395 | if (dest->addrtype == TIPC_ADDR_NAME) |
1396 | return tipc_send_group_anycast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1397 | if (dest->addrtype == TIPC_ADDR_ID) |
1398 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
5b8dddb6 JM |
1399 | if (dest->addrtype == TIPC_ADDR_MCAST) |
1400 | return tipc_send_group_mcast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1401 | return -EINVAL; |
1402 | } | |
75da2163 | 1403 | |
f2f8036e | 1404 | if (unlikely(!dest)) { |
365ad353 | 1405 | dest = &tsk->peer; |
0e632089 | 1406 | if (!syn && dest->family != AF_TIPC) |
f2f8036e | 1407 | return -EDESTADDRREQ; |
f2f8036e | 1408 | } |
365ad353 | 1409 | |
365ad353 | 1410 | if (unlikely(syn)) { |
0c288c86 | 1411 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 1412 | return -EPIPE; |
438adcaf | 1413 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
1414 | return -EISCONN; |
1415 | if (tsk->published) | |
1416 | return -EOPNOTSUPP; | |
3388007b | 1417 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
1418 | tsk->conn_type = dest->addr.name.name.type; |
1419 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 1420 | } |
25b9221b | 1421 | msg_set_syn(hdr, 1); |
b97bf3fd | 1422 | } |
e2dafe87 | 1423 | |
365ad353 JPM |
1424 | seq = &dest->addr.nameseq; |
1425 | if (dest->addrtype == TIPC_ADDR_MCAST) | |
1426 | return tipc_sendmcast(sock, seq, m, dlen, timeout); | |
e2dafe87 | 1427 | |
365ad353 JPM |
1428 | if (dest->addrtype == TIPC_ADDR_NAME) { |
1429 | type = dest->addr.name.name.type; | |
1430 | inst = dest->addr.name.name.instance; | |
928df188 | 1431 | dnode = dest->addr.name.domain; |
4ac1c8d0 | 1432 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
39a0295f YX |
1433 | if (unlikely(!dport && !dnode)) |
1434 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
1435 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
1436 | dnode = dest->addr.id.node; | |
335b929b JM |
1437 | } else { |
1438 | return -EINVAL; | |
e2dafe87 JPM |
1439 | } |
1440 | ||
365ad353 | 1441 | /* Block or return if destination link is congested */ |
a80ae530 JM |
1442 | rc = tipc_wait_for_cond(sock, &timeout, |
1443 | !tipc_dest_find(clinks, dnode, 0)); | |
365ad353 JPM |
1444 | if (unlikely(rc)) |
1445 | return rc; | |
1446 | ||
abc9b4e0 TL |
1447 | if (dest->addrtype == TIPC_ADDR_NAME) { |
1448 | msg_set_type(hdr, TIPC_NAMED_MSG); | |
1449 | msg_set_hdr_sz(hdr, NAMED_H_SIZE); | |
1450 | msg_set_nametype(hdr, type); | |
1451 | msg_set_nameinst(hdr, inst); | |
1452 | msg_set_lookup_scope(hdr, tipc_node2scope(dnode)); | |
1453 | msg_set_destnode(hdr, dnode); | |
1454 | msg_set_destport(hdr, dport); | |
1455 | } else { /* TIPC_ADDR_ID */ | |
1456 | msg_set_type(hdr, TIPC_DIRECT_MSG); | |
1457 | msg_set_lookup_scope(hdr, 0); | |
1458 | msg_set_destnode(hdr, dnode); | |
1459 | msg_set_destport(hdr, dest->addr.id.ref); | |
1460 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); | |
1461 | } | |
1462 | ||
e654f9f5 | 1463 | __skb_queue_head_init(&pkts); |
8b1e5b0a | 1464 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid, true); |
365ad353 JPM |
1465 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
1466 | if (unlikely(rc != dlen)) | |
39a0295f | 1467 | return rc; |
2fe97a57 TN |
1468 | if (unlikely(syn && !tipc_msg_skb_clone(&pkts, &sk->sk_write_queue))) { |
1469 | __skb_queue_purge(&pkts); | |
67879274 | 1470 | return -ENOMEM; |
2fe97a57 | 1471 | } |
e2dafe87 | 1472 | |
01e661eb | 1473 | trace_tipc_sk_sendmsg(sk, skb_peek(&pkts), TIPC_DUMP_SK_SNDQ, " "); |
365ad353 JPM |
1474 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); |
1475 | if (unlikely(rc == -ELINKCONG)) { | |
a80ae530 | 1476 | tipc_dest_push(clinks, dnode, 0); |
365ad353 JPM |
1477 | tsk->cong_link_cnt++; |
1478 | rc = 0; | |
1479 | } | |
e2dafe87 | 1480 | |
365ad353 JPM |
1481 | if (unlikely(syn && !rc)) |
1482 | tipc_set_sk_state(sk, TIPC_CONNECTING); | |
1483 | ||
1484 | return rc ? rc : dlen; | |
b97bf3fd PL |
1485 | } |
1486 | ||
c4307285 | 1487 | /** |
365ad353 | 1488 | * tipc_sendstream - send stream-oriented data |
b97bf3fd | 1489 | * @sock: socket structure |
4ccfe5e0 JPM |
1490 | * @m: data to send |
1491 | * @dsz: total length of data to be transmitted | |
c4307285 | 1492 | * |
4ccfe5e0 | 1493 | * Used for SOCK_STREAM data. |
c4307285 | 1494 | * |
4ccfe5e0 JPM |
1495 | * Returns the number of bytes sent on success (or partial success), |
1496 | * or errno if no data sent | |
b97bf3fd | 1497 | */ |
365ad353 | 1498 | static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1499 | { |
1500 | struct sock *sk = sock->sk; | |
1501 | int ret; | |
1502 | ||
1503 | lock_sock(sk); | |
365ad353 | 1504 | ret = __tipc_sendstream(sock, m, dsz); |
39a0295f YX |
1505 | release_sock(sk); |
1506 | ||
1507 | return ret; | |
1508 | } | |
1509 | ||
365ad353 | 1510 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1511 | { |
0c3141e9 | 1512 | struct sock *sk = sock->sk; |
342dfc30 | 1513 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
365ad353 | 1514 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
c0bceb97 | 1515 | struct sk_buff_head *txq = &sk->sk_write_queue; |
365ad353 JPM |
1516 | struct tipc_sock *tsk = tipc_sk(sk); |
1517 | struct tipc_msg *hdr = &tsk->phdr; | |
1518 | struct net *net = sock_net(sk); | |
365ad353 | 1519 | u32 dnode = tsk_peer_node(tsk); |
c0bceb97 JM |
1520 | int maxnagle = tsk->maxnagle; |
1521 | int maxpkt = tsk->max_pkt; | |
365ad353 | 1522 | int send, sent = 0; |
c0bceb97 | 1523 | int blocks, rc = 0; |
7cf87fa2 | 1524 | |
365ad353 JPM |
1525 | if (unlikely(dlen > INT_MAX)) |
1526 | return -EMSGSIZE; | |
4ccfe5e0 | 1527 | |
365ad353 JPM |
1528 | /* Handle implicit connection setup */ |
1529 | if (unlikely(dest)) { | |
1530 | rc = __tipc_sendmsg(sock, m, dlen); | |
92ef12b3 PB |
1531 | if (dlen && dlen == rc) { |
1532 | tsk->peer_caps = tipc_node_get_capabilities(net, dnode); | |
365ad353 | 1533 | tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); |
92ef12b3 | 1534 | } |
39a0295f | 1535 | return rc; |
365ad353 | 1536 | } |
f214fc40 | 1537 | |
c4307285 | 1538 | do { |
365ad353 JPM |
1539 | rc = tipc_wait_for_cond(sock, &timeout, |
1540 | (!tsk->cong_link_cnt && | |
8c44e1af JPM |
1541 | !tsk_conn_cong(tsk) && |
1542 | tipc_sk_connected(sk))); | |
365ad353 JPM |
1543 | if (unlikely(rc)) |
1544 | break; | |
365ad353 | 1545 | send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE); |
c0bceb97 JM |
1546 | blocks = tsk->snd_backlog; |
1547 | if (tsk->oneway++ >= 4 && send <= maxnagle) { | |
1548 | rc = tipc_msg_append(hdr, m, send, maxnagle, txq); | |
1549 | if (unlikely(rc < 0)) | |
1550 | break; | |
1551 | blocks += rc; | |
1552 | if (blocks <= 64 && tsk->expect_ack) { | |
1553 | tsk->snd_backlog = blocks; | |
1554 | sent += send; | |
1555 | break; | |
1556 | } | |
1557 | tsk->expect_ack = true; | |
1558 | } else { | |
1559 | rc = tipc_msg_build(hdr, m, sent, send, maxpkt, txq); | |
1560 | if (unlikely(rc != send)) | |
1561 | break; | |
1562 | blocks += tsk_inc(tsk, send + MIN_H_SIZE); | |
1563 | } | |
1564 | trace_tipc_sk_sendstream(sk, skb_peek(txq), | |
01e661eb | 1565 | TIPC_DUMP_SK_SNDQ, " "); |
c0bceb97 | 1566 | rc = tipc_node_xmit(net, txq, dnode, tsk->portid); |
365ad353 JPM |
1567 | if (unlikely(rc == -ELINKCONG)) { |
1568 | tsk->cong_link_cnt = 1; | |
1569 | rc = 0; | |
1570 | } | |
1571 | if (likely(!rc)) { | |
c0bceb97 JM |
1572 | tsk->snt_unacked += blocks; |
1573 | tsk->snd_backlog = 0; | |
365ad353 JPM |
1574 | sent += send; |
1575 | } | |
1576 | } while (sent < dlen && !rc); | |
39a0295f | 1577 | |
3364d61c | 1578 | return sent ? sent : rc; |
b97bf3fd PL |
1579 | } |
1580 | ||
c4307285 | 1581 | /** |
4ccfe5e0 | 1582 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1583 | * @sock: socket structure |
4ccfe5e0 JPM |
1584 | * @m: message to send |
1585 | * @dsz: length of data to be transmitted | |
c4307285 | 1586 | * |
4ccfe5e0 | 1587 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1588 | * |
4ccfe5e0 | 1589 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1590 | */ |
1b784140 | 1591 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1592 | { |
4ccfe5e0 JPM |
1593 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1594 | return -EMSGSIZE; | |
b97bf3fd | 1595 | |
365ad353 | 1596 | return tipc_sendstream(sock, m, dsz); |
b97bf3fd PL |
1597 | } |
1598 | ||
dadebc00 | 1599 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1600 | */ |
301bae56 | 1601 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1602 | u32 peer_node) |
b97bf3fd | 1603 | { |
3721e9c7 YX |
1604 | struct sock *sk = &tsk->sk; |
1605 | struct net *net = sock_net(sk); | |
301bae56 | 1606 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1607 | |
25b9221b | 1608 | msg_set_syn(msg, 0); |
dadebc00 JPM |
1609 | msg_set_destnode(msg, peer_node); |
1610 | msg_set_destport(msg, peer_port); | |
1611 | msg_set_type(msg, TIPC_CONN_MSG); | |
1612 | msg_set_lookup_scope(msg, 0); | |
1613 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1614 | |
0d5fcebf | 1615 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
8ea642ee | 1616 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d | 1617 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
f73b1281 | 1618 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid, true); |
60020e18 | 1619 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
c0bceb97 | 1620 | tsk_set_nagle(tsk); |
67879274 | 1621 | __skb_queue_purge(&sk->sk_write_queue); |
10724cc7 JPM |
1622 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1623 | return; | |
1624 | ||
1625 | /* Fall back to message based flow control */ | |
1626 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1627 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1628 | } |
1629 | ||
1630 | /** | |
31c82a2d | 1631 | * tipc_sk_set_orig_addr - capture sender's address for received message |
b97bf3fd | 1632 | * @m: descriptor for message info |
31c82a2d | 1633 | * @hdr: received message header |
c4307285 | 1634 | * |
b97bf3fd PL |
1635 | * Note: Address is not captured if not requested by receiver. |
1636 | */ | |
31c82a2d | 1637 | static void tipc_sk_set_orig_addr(struct msghdr *m, struct sk_buff *skb) |
b97bf3fd | 1638 | { |
31c82a2d JM |
1639 | DECLARE_SOCKADDR(struct sockaddr_pair *, srcaddr, m->msg_name); |
1640 | struct tipc_msg *hdr = buf_msg(skb); | |
1641 | ||
1642 | if (!srcaddr) | |
1643 | return; | |
1644 | ||
1645 | srcaddr->sock.family = AF_TIPC; | |
1646 | srcaddr->sock.addrtype = TIPC_ADDR_ID; | |
09c8b971 | 1647 | srcaddr->sock.scope = 0; |
31c82a2d JM |
1648 | srcaddr->sock.addr.id.ref = msg_origport(hdr); |
1649 | srcaddr->sock.addr.id.node = msg_orignode(hdr); | |
1650 | srcaddr->sock.addr.name.domain = 0; | |
31c82a2d JM |
1651 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1652 | ||
1653 | if (!msg_in_group(hdr)) | |
1654 | return; | |
1655 | ||
1656 | /* Group message users may also want to know sending member's id */ | |
1657 | srcaddr->member.family = AF_TIPC; | |
1658 | srcaddr->member.addrtype = TIPC_ADDR_NAME; | |
09c8b971 | 1659 | srcaddr->member.scope = 0; |
31c82a2d JM |
1660 | srcaddr->member.addr.name.name.type = msg_nametype(hdr); |
1661 | srcaddr->member.addr.name.name.instance = TIPC_SKB_CB(skb)->orig_member; | |
1662 | srcaddr->member.addr.name.domain = 0; | |
1663 | m->msg_namelen = sizeof(*srcaddr); | |
b97bf3fd PL |
1664 | } |
1665 | ||
1666 | /** | |
301bae56 | 1667 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd | 1668 | * @m: descriptor for message info |
1c1274a5 | 1669 | * @skb: received message buffer |
301bae56 | 1670 | * @tsk: TIPC port associated with message |
c4307285 | 1671 | * |
b97bf3fd | 1672 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1673 | * |
b97bf3fd PL |
1674 | * Returns 0 if successful, otherwise errno |
1675 | */ | |
1c1274a5 | 1676 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct sk_buff *skb, |
301bae56 | 1677 | struct tipc_sock *tsk) |
b97bf3fd | 1678 | { |
1c1274a5 | 1679 | struct tipc_msg *msg; |
b97bf3fd PL |
1680 | u32 anc_data[3]; |
1681 | u32 err; | |
1682 | u32 dest_type; | |
3546c750 | 1683 | int has_name; |
b97bf3fd PL |
1684 | int res; |
1685 | ||
1686 | if (likely(m->msg_controllen == 0)) | |
1687 | return 0; | |
1c1274a5 | 1688 | msg = buf_msg(skb); |
b97bf3fd PL |
1689 | |
1690 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1691 | err = msg ? msg_errcode(msg) : 0; |
1692 | if (unlikely(err)) { | |
1693 | anc_data[0] = err; | |
1694 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1695 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1696 | if (res) | |
b97bf3fd | 1697 | return res; |
2db9983a | 1698 | if (anc_data[1]) { |
1c1274a5 JM |
1699 | if (skb_linearize(skb)) |
1700 | return -ENOMEM; | |
1701 | msg = buf_msg(skb); | |
2db9983a AS |
1702 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], |
1703 | msg_data(msg)); | |
1704 | if (res) | |
1705 | return res; | |
1706 | } | |
b97bf3fd PL |
1707 | } |
1708 | ||
1709 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1710 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1711 | switch (dest_type) { | |
1712 | case TIPC_NAMED_MSG: | |
3546c750 | 1713 | has_name = 1; |
b97bf3fd PL |
1714 | anc_data[0] = msg_nametype(msg); |
1715 | anc_data[1] = msg_namelower(msg); | |
1716 | anc_data[2] = msg_namelower(msg); | |
1717 | break; | |
1718 | case TIPC_MCAST_MSG: | |
3546c750 | 1719 | has_name = 1; |
b97bf3fd PL |
1720 | anc_data[0] = msg_nametype(msg); |
1721 | anc_data[1] = msg_namelower(msg); | |
1722 | anc_data[2] = msg_nameupper(msg); | |
1723 | break; | |
1724 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1725 | has_name = (tsk->conn_type != 0); |
1726 | anc_data[0] = tsk->conn_type; | |
1727 | anc_data[1] = tsk->conn_instance; | |
1728 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1729 | break; |
1730 | default: | |
3546c750 | 1731 | has_name = 0; |
b97bf3fd | 1732 | } |
2db9983a AS |
1733 | if (has_name) { |
1734 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1735 | if (res) | |
1736 | return res; | |
1737 | } | |
b97bf3fd PL |
1738 | |
1739 | return 0; | |
1740 | } | |
1741 | ||
c7268589 | 1742 | static struct sk_buff *tipc_sk_build_ack(struct tipc_sock *tsk) |
739f5e4e | 1743 | { |
d6fb7e9c | 1744 | struct sock *sk = &tsk->sk; |
a6ca1094 | 1745 | struct sk_buff *skb = NULL; |
739f5e4e | 1746 | struct tipc_msg *msg; |
301bae56 JPM |
1747 | u32 peer_port = tsk_peer_port(tsk); |
1748 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1749 | |
d6fb7e9c | 1750 | if (!tipc_sk_connected(sk)) |
c7268589 | 1751 | return NULL; |
c5898636 JPM |
1752 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1753 | dnode, tsk_own_node(tsk), peer_port, | |
1754 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1755 | if (!skb) |
c7268589 | 1756 | return NULL; |
a6ca1094 | 1757 | msg = buf_msg(skb); |
10724cc7 JPM |
1758 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1759 | tsk->rcv_unacked = 0; | |
1760 | ||
1761 | /* Adjust to and advertize the correct window limit */ | |
1762 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1763 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1764 | msg_set_adv_win(msg, tsk->rcv_win); | |
1765 | } | |
c7268589 TL |
1766 | return skb; |
1767 | } | |
1768 | ||
1769 | static void tipc_sk_send_ack(struct tipc_sock *tsk) | |
1770 | { | |
1771 | struct sk_buff *skb; | |
1772 | ||
1773 | skb = tipc_sk_build_ack(tsk); | |
1774 | if (!skb) | |
1775 | return; | |
1776 | ||
1777 | tipc_node_xmit_skb(sock_net(&tsk->sk), skb, tsk_peer_node(tsk), | |
1778 | msg_link_selector(buf_msg(skb))); | |
739f5e4e JPM |
1779 | } |
1780 | ||
85d3fc94 | 1781 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1782 | { |
1783 | struct sock *sk = sock->sk; | |
48766a58 | 1784 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
85d3fc94 | 1785 | long timeo = *timeop; |
4e0df495 PB |
1786 | int err = sock_error(sk); |
1787 | ||
1788 | if (err) | |
1789 | return err; | |
9bbb4ecc YX |
1790 | |
1791 | for (;;) { | |
fe8e4649 | 1792 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1793 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1794 | err = -ENOTCONN; |
1795 | break; | |
1796 | } | |
48766a58 | 1797 | add_wait_queue(sk_sleep(sk), &wait); |
9bbb4ecc | 1798 | release_sock(sk); |
48766a58 TN |
1799 | timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); |
1800 | sched_annotate_sleep(); | |
9bbb4ecc | 1801 | lock_sock(sk); |
48766a58 | 1802 | remove_wait_queue(sk_sleep(sk), &wait); |
9bbb4ecc YX |
1803 | } |
1804 | err = 0; | |
1805 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1806 | break; | |
9bbb4ecc YX |
1807 | err = -EAGAIN; |
1808 | if (!timeo) | |
1809 | break; | |
143fe22f EH |
1810 | err = sock_intr_errno(timeo); |
1811 | if (signal_pending(current)) | |
1812 | break; | |
4e0df495 PB |
1813 | |
1814 | err = sock_error(sk); | |
1815 | if (err) | |
1816 | break; | |
9bbb4ecc | 1817 | } |
85d3fc94 | 1818 | *timeop = timeo; |
9bbb4ecc YX |
1819 | return err; |
1820 | } | |
1821 | ||
c4307285 | 1822 | /** |
247f0f3c | 1823 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd | 1824 | * @m: descriptor for message info |
e9f8b101 | 1825 | * @buflen: length of user buffer area |
b97bf3fd | 1826 | * @flags: receive flags |
c4307285 | 1827 | * |
b97bf3fd PL |
1828 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1829 | * If the complete message doesn't fit in user area, truncate it. | |
1830 | * | |
1831 | * Returns size of returned message data, errno otherwise | |
1832 | */ | |
e9f8b101 JPM |
1833 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, |
1834 | size_t buflen, int flags) | |
b97bf3fd | 1835 | { |
0c3141e9 | 1836 | struct sock *sk = sock->sk; |
e9f8b101 | 1837 | bool connected = !tipc_sk_type_connectionless(sk); |
ae236fb2 | 1838 | struct tipc_sock *tsk = tipc_sk(sk); |
e9f8b101 | 1839 | int rc, err, hlen, dlen, copy; |
b7d42635 | 1840 | struct sk_buff_head xmitq; |
ae236fb2 JM |
1841 | struct tipc_msg *hdr; |
1842 | struct sk_buff *skb; | |
1843 | bool grp_evt; | |
e9f8b101 | 1844 | long timeout; |
b97bf3fd | 1845 | |
0c3141e9 | 1846 | /* Catch invalid receive requests */ |
e9f8b101 | 1847 | if (unlikely(!buflen)) |
b97bf3fd PL |
1848 | return -EINVAL; |
1849 | ||
0c3141e9 | 1850 | lock_sock(sk); |
e9f8b101 JPM |
1851 | if (unlikely(connected && sk->sk_state == TIPC_OPEN)) { |
1852 | rc = -ENOTCONN; | |
b97bf3fd PL |
1853 | goto exit; |
1854 | } | |
e9f8b101 | 1855 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1856 | |
b7d42635 | 1857 | /* Step rcv queue to first msg with data or error; wait if necessary */ |
e9f8b101 | 1858 | do { |
e9f8b101 JPM |
1859 | rc = tipc_wait_for_rcvmsg(sock, &timeout); |
1860 | if (unlikely(rc)) | |
1861 | goto exit; | |
1862 | skb = skb_peek(&sk->sk_receive_queue); | |
1863 | hdr = buf_msg(skb); | |
1864 | dlen = msg_data_sz(hdr); | |
1865 | hlen = msg_hdr_sz(hdr); | |
1866 | err = msg_errcode(hdr); | |
ae236fb2 | 1867 | grp_evt = msg_is_grp_evt(hdr); |
e9f8b101 JPM |
1868 | if (likely(dlen || err)) |
1869 | break; | |
2e84c60b | 1870 | tsk_advance_rx_queue(sk); |
e9f8b101 | 1871 | } while (1); |
b97bf3fd | 1872 | |
e9f8b101 | 1873 | /* Collect msg meta data, including error code and rejected data */ |
31c82a2d | 1874 | tipc_sk_set_orig_addr(m, skb); |
1c1274a5 | 1875 | rc = tipc_sk_anc_data_recv(m, skb, tsk); |
e9f8b101 | 1876 | if (unlikely(rc)) |
b97bf3fd | 1877 | goto exit; |
1c1274a5 | 1878 | hdr = buf_msg(skb); |
b97bf3fd | 1879 | |
e9f8b101 JPM |
1880 | /* Capture data if non-error msg, otherwise just set return value */ |
1881 | if (likely(!err)) { | |
1882 | copy = min_t(int, dlen, buflen); | |
1883 | if (unlikely(copy != dlen)) | |
b97bf3fd | 1884 | m->msg_flags |= MSG_TRUNC; |
e9f8b101 | 1885 | rc = skb_copy_datagram_msg(skb, hlen, m, copy); |
b97bf3fd | 1886 | } else { |
e9f8b101 JPM |
1887 | copy = 0; |
1888 | rc = 0; | |
1889 | if (err != TIPC_CONN_SHUTDOWN && connected && !m->msg_control) | |
1890 | rc = -ECONNRESET; | |
b97bf3fd | 1891 | } |
e9f8b101 JPM |
1892 | if (unlikely(rc)) |
1893 | goto exit; | |
b97bf3fd | 1894 | |
ae236fb2 JM |
1895 | /* Mark message as group event if applicable */ |
1896 | if (unlikely(grp_evt)) { | |
1897 | if (msg_grp_evt(hdr) == TIPC_WITHDRAWN) | |
1898 | m->msg_flags |= MSG_EOR; | |
1899 | m->msg_flags |= MSG_OOB; | |
1900 | copy = 0; | |
1901 | } | |
1902 | ||
e9f8b101 | 1903 | /* Caption of data or error code/rejected data was successful */ |
10724cc7 JPM |
1904 | if (unlikely(flags & MSG_PEEK)) |
1905 | goto exit; | |
1906 | ||
b7d42635 JM |
1907 | /* Send group flow control advertisement when applicable */ |
1908 | if (tsk->group && msg_in_group(hdr) && !grp_evt) { | |
e654f9f5 | 1909 | __skb_queue_head_init(&xmitq); |
b7d42635 JM |
1910 | tipc_group_update_rcv_win(tsk->group, tsk_blocks(hlen + dlen), |
1911 | msg_orignode(hdr), msg_origport(hdr), | |
1912 | &xmitq); | |
1913 | tipc_node_distr_xmit(sock_net(sk), &xmitq); | |
1914 | } | |
1915 | ||
10724cc7 | 1916 | tsk_advance_rx_queue(sk); |
ae236fb2 | 1917 | |
e9f8b101 JPM |
1918 | if (likely(!connected)) |
1919 | goto exit; | |
1920 | ||
b7d42635 | 1921 | /* Send connection flow control advertisement when applicable */ |
e9f8b101 JPM |
1922 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); |
1923 | if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE) | |
1924 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1925 | exit: |
0c3141e9 | 1926 | release_sock(sk); |
e9f8b101 | 1927 | return rc ? rc : copy; |
b97bf3fd PL |
1928 | } |
1929 | ||
c4307285 | 1930 | /** |
ec8a09fb | 1931 | * tipc_recvstream - receive stream-oriented data |
b97bf3fd | 1932 | * @m: descriptor for message info |
ec8a09fb | 1933 | * @buflen: total size of user buffer area |
b97bf3fd | 1934 | * @flags: receive flags |
c4307285 YH |
1935 | * |
1936 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1937 | * will optionally wait for more; never truncates data. |
1938 | * | |
1939 | * Returns size of returned message data, errno otherwise | |
1940 | */ | |
ec8a09fb JPM |
1941 | static int tipc_recvstream(struct socket *sock, struct msghdr *m, |
1942 | size_t buflen, int flags) | |
b97bf3fd | 1943 | { |
0c3141e9 | 1944 | struct sock *sk = sock->sk; |
58ed9442 | 1945 | struct tipc_sock *tsk = tipc_sk(sk); |
ec8a09fb JPM |
1946 | struct sk_buff *skb; |
1947 | struct tipc_msg *hdr; | |
1948 | struct tipc_skb_cb *skb_cb; | |
1949 | bool peek = flags & MSG_PEEK; | |
1950 | int offset, required, copy, copied = 0; | |
1951 | int hlen, dlen, err, rc; | |
1952 | long timeout; | |
b97bf3fd | 1953 | |
0c3141e9 | 1954 | /* Catch invalid receive attempts */ |
ec8a09fb | 1955 | if (unlikely(!buflen)) |
b97bf3fd PL |
1956 | return -EINVAL; |
1957 | ||
0c3141e9 | 1958 | lock_sock(sk); |
b97bf3fd | 1959 | |
438adcaf | 1960 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
ec8a09fb | 1961 | rc = -ENOTCONN; |
9bbb4ecc | 1962 | goto exit; |
b97bf3fd | 1963 | } |
ec8a09fb JPM |
1964 | required = sock_rcvlowat(sk, flags & MSG_WAITALL, buflen); |
1965 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
b97bf3fd | 1966 | |
ec8a09fb JPM |
1967 | do { |
1968 | /* Look at first msg in receive queue; wait if necessary */ | |
1969 | rc = tipc_wait_for_rcvmsg(sock, &timeout); | |
1970 | if (unlikely(rc)) | |
1971 | break; | |
1972 | skb = skb_peek(&sk->sk_receive_queue); | |
1973 | skb_cb = TIPC_SKB_CB(skb); | |
1974 | hdr = buf_msg(skb); | |
1975 | dlen = msg_data_sz(hdr); | |
1976 | hlen = msg_hdr_sz(hdr); | |
1977 | err = msg_errcode(hdr); | |
0232fd0a | 1978 | |
ec8a09fb JPM |
1979 | /* Discard any empty non-errored (SYN-) message */ |
1980 | if (unlikely(!dlen && !err)) { | |
1981 | tsk_advance_rx_queue(sk); | |
1982 | continue; | |
1983 | } | |
0232fd0a | 1984 | |
ec8a09fb JPM |
1985 | /* Collect msg meta data, incl. error code and rejected data */ |
1986 | if (!copied) { | |
31c82a2d | 1987 | tipc_sk_set_orig_addr(m, skb); |
1c1274a5 | 1988 | rc = tipc_sk_anc_data_recv(m, skb, tsk); |
ec8a09fb JPM |
1989 | if (rc) |
1990 | break; | |
1c1274a5 | 1991 | hdr = buf_msg(skb); |
ec8a09fb | 1992 | } |
b97bf3fd | 1993 | |
ec8a09fb JPM |
1994 | /* Copy data if msg ok, otherwise return error/partial data */ |
1995 | if (likely(!err)) { | |
1996 | offset = skb_cb->bytes_read; | |
1997 | copy = min_t(int, dlen - offset, buflen - copied); | |
1998 | rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy); | |
1999 | if (unlikely(rc)) | |
2000 | break; | |
2001 | copied += copy; | |
2002 | offset += copy; | |
2003 | if (unlikely(offset < dlen)) { | |
2004 | if (!peek) | |
2005 | skb_cb->bytes_read = offset; | |
2006 | break; | |
2007 | } | |
2008 | } else { | |
2009 | rc = 0; | |
2010 | if ((err != TIPC_CONN_SHUTDOWN) && !m->msg_control) | |
2011 | rc = -ECONNRESET; | |
2012 | if (copied || rc) | |
2013 | break; | |
b97bf3fd | 2014 | } |
b97bf3fd | 2015 | |
ec8a09fb JPM |
2016 | if (unlikely(peek)) |
2017 | break; | |
b97bf3fd | 2018 | |
ec8a09fb | 2019 | tsk_advance_rx_queue(sk); |
10724cc7 | 2020 | |
ec8a09fb JPM |
2021 | /* Send connection flow control advertisement when applicable */ |
2022 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); | |
c7268589 | 2023 | if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE) |
ec8a09fb | 2024 | tipc_sk_send_ack(tsk); |
b97bf3fd | 2025 | |
ec8a09fb JPM |
2026 | /* Exit if all requested data or FIN/error received */ |
2027 | if (copied == buflen || err) | |
2028 | break; | |
b97bf3fd | 2029 | |
ec8a09fb | 2030 | } while (!skb_queue_empty(&sk->sk_receive_queue) || copied < required); |
b97bf3fd | 2031 | exit: |
0c3141e9 | 2032 | release_sock(sk); |
ec8a09fb | 2033 | return copied ? copied : rc; |
b97bf3fd PL |
2034 | } |
2035 | ||
f288bef4 YX |
2036 | /** |
2037 | * tipc_write_space - wake up thread if port congestion is released | |
2038 | * @sk: socket | |
2039 | */ | |
2040 | static void tipc_write_space(struct sock *sk) | |
2041 | { | |
2042 | struct socket_wq *wq; | |
2043 | ||
2044 | rcu_read_lock(); | |
2045 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 2046 | if (skwq_has_sleeper(wq)) |
a9a08845 LT |
2047 | wake_up_interruptible_sync_poll(&wq->wait, EPOLLOUT | |
2048 | EPOLLWRNORM | EPOLLWRBAND); | |
f288bef4 YX |
2049 | rcu_read_unlock(); |
2050 | } | |
2051 | ||
2052 | /** | |
2053 | * tipc_data_ready - wake up threads to indicate messages have been received | |
2054 | * @sk: socket | |
2055 | * @len: the length of messages | |
2056 | */ | |
676d2369 | 2057 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
2058 | { |
2059 | struct socket_wq *wq; | |
2060 | ||
2061 | rcu_read_lock(); | |
2062 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 2063 | if (skwq_has_sleeper(wq)) |
a9a08845 LT |
2064 | wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN | |
2065 | EPOLLRDNORM | EPOLLRDBAND); | |
f288bef4 YX |
2066 | rcu_read_unlock(); |
2067 | } | |
2068 | ||
f4195d1e YX |
2069 | static void tipc_sock_destruct(struct sock *sk) |
2070 | { | |
2071 | __skb_queue_purge(&sk->sk_receive_queue); | |
2072 | } | |
2073 | ||
64ac5f59 JM |
2074 | static void tipc_sk_proto_rcv(struct sock *sk, |
2075 | struct sk_buff_head *inputq, | |
2076 | struct sk_buff_head *xmitq) | |
2077 | { | |
2078 | struct sk_buff *skb = __skb_dequeue(inputq); | |
2079 | struct tipc_sock *tsk = tipc_sk(sk); | |
2080 | struct tipc_msg *hdr = buf_msg(skb); | |
75da2163 | 2081 | struct tipc_group *grp = tsk->group; |
b7d42635 | 2082 | bool wakeup = false; |
64ac5f59 JM |
2083 | |
2084 | switch (msg_user(hdr)) { | |
2085 | case CONN_MANAGER: | |
e7eb0582 | 2086 | tipc_sk_conn_proto_rcv(tsk, skb, inputq, xmitq); |
64ac5f59 JM |
2087 | return; |
2088 | case SOCK_WAKEUP: | |
a80ae530 | 2089 | tipc_dest_del(&tsk->cong_links, msg_orignode(hdr), 0); |
bfd07f3d TN |
2090 | /* coupled with smp_rmb() in tipc_wait_for_cond() */ |
2091 | smp_wmb(); | |
64ac5f59 | 2092 | tsk->cong_link_cnt--; |
b7d42635 | 2093 | wakeup = true; |
c0bceb97 | 2094 | tipc_sk_push_backlog(tsk); |
64ac5f59 | 2095 | break; |
75da2163 | 2096 | case GROUP_PROTOCOL: |
b7d42635 | 2097 | tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq); |
75da2163 | 2098 | break; |
64ac5f59 | 2099 | case TOP_SRV: |
b7d42635 | 2100 | tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf, |
7ad32bcb | 2101 | hdr, inputq, xmitq); |
64ac5f59 JM |
2102 | break; |
2103 | default: | |
2104 | break; | |
2105 | } | |
2106 | ||
b7d42635 JM |
2107 | if (wakeup) |
2108 | sk->sk_write_space(sk); | |
2109 | ||
64ac5f59 JM |
2110 | kfree_skb(skb); |
2111 | } | |
2112 | ||
7e6c131e | 2113 | /** |
39fdc9c7 | 2114 | * tipc_sk_filter_connect - check incoming message for a connection-based socket |
58ed9442 | 2115 | * @tsk: TIPC socket |
39fdc9c7 | 2116 | * @skb: pointer to message buffer. |
c7268589 | 2117 | * @xmitq: for Nagle ACK if any |
39fdc9c7 | 2118 | * Returns true if message should be added to receive queue, false otherwise |
7e6c131e | 2119 | */ |
c7268589 TL |
2120 | static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb, |
2121 | struct sk_buff_head *xmitq) | |
7e6c131e | 2122 | { |
58ed9442 | 2123 | struct sock *sk = &tsk->sk; |
f2f9800d | 2124 | struct net *net = sock_net(sk); |
cda3696d | 2125 | struct tipc_msg *hdr = buf_msg(skb); |
39fdc9c7 JM |
2126 | bool con_msg = msg_connected(hdr); |
2127 | u32 pport = tsk_peer_port(tsk); | |
2128 | u32 pnode = tsk_peer_node(tsk); | |
2129 | u32 oport = msg_origport(hdr); | |
2130 | u32 onode = msg_orignode(hdr); | |
2131 | int err = msg_errcode(hdr); | |
67879274 | 2132 | unsigned long delay; |
7e6c131e | 2133 | |
cda3696d JPM |
2134 | if (unlikely(msg_mcast(hdr))) |
2135 | return false; | |
c0bceb97 | 2136 | tsk->oneway = 0; |
7e6c131e | 2137 | |
99a20889 PB |
2138 | switch (sk->sk_state) { |
2139 | case TIPC_CONNECTING: | |
39fdc9c7 JM |
2140 | /* Setup ACK */ |
2141 | if (likely(con_msg)) { | |
2142 | if (err) | |
2143 | break; | |
2144 | tipc_sk_finish_conn(tsk, oport, onode); | |
2145 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
2146 | /* ACK+ message with data is added to receive queue */ | |
2147 | if (msg_data_sz(hdr)) | |
2148 | return true; | |
2149 | /* Empty ACK-, - wake up sleeping connect() and drop */ | |
ff946833 | 2150 | sk->sk_state_change(sk); |
39fdc9c7 JM |
2151 | msg_set_dest_droppable(hdr, 1); |
2152 | return false; | |
584d24b3 | 2153 | } |
39fdc9c7 JM |
2154 | /* Ignore connectionless message if not from listening socket */ |
2155 | if (oport != pport || onode != pnode) | |
2156 | return false; | |
584d24b3 | 2157 | |
67879274 TN |
2158 | /* Rejected SYN */ |
2159 | if (err != TIPC_ERR_OVERLOAD) | |
2160 | break; | |
2161 | ||
2162 | /* Prepare for new setup attempt if we have a SYN clone */ | |
2163 | if (skb_queue_empty(&sk->sk_write_queue)) | |
2164 | break; | |
2165 | get_random_bytes(&delay, 2); | |
2166 | delay %= (tsk->conn_timeout / 4); | |
2167 | delay = msecs_to_jiffies(delay + 100); | |
2168 | sk_reset_timer(sk, &sk->sk_timer, jiffies + delay); | |
2169 | return false; | |
438adcaf | 2170 | case TIPC_OPEN: |
9fd4b070 | 2171 | case TIPC_DISCONNECTING: |
39fdc9c7 | 2172 | return false; |
438adcaf | 2173 | case TIPC_LISTEN: |
7e6c131e | 2174 | /* Accept only SYN message */ |
25b9221b JM |
2175 | if (!msg_is_syn(hdr) && |
2176 | tipc_node_get_capabilities(net, onode) & TIPC_SYN_BIT) | |
2177 | return false; | |
39fdc9c7 | 2178 | if (!con_msg && !err) |
cda3696d | 2179 | return true; |
39fdc9c7 | 2180 | return false; |
f40acbaf | 2181 | case TIPC_ESTABLISHED: |
c0bceb97 JM |
2182 | if (!skb_queue_empty(&sk->sk_write_queue)) |
2183 | tipc_sk_push_backlog(tsk); | |
f40acbaf | 2184 | /* Accept only connection-based messages sent by peer */ |
c7268589 TL |
2185 | if (likely(con_msg && !err && pport == oport && |
2186 | pnode == onode)) { | |
2187 | if (msg_ack_required(hdr)) { | |
2188 | struct sk_buff *skb; | |
2189 | ||
2190 | skb = tipc_sk_build_ack(tsk); | |
2191 | if (skb) | |
2192 | __skb_queue_tail(xmitq, skb); | |
2193 | } | |
39fdc9c7 | 2194 | return true; |
c7268589 | 2195 | } |
39fdc9c7 | 2196 | if (!tsk_peer_msg(tsk, hdr)) |
f40acbaf | 2197 | return false; |
39fdc9c7 JM |
2198 | if (!err) |
2199 | return true; | |
2200 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2201 | tipc_node_remove_conn(net, pnode, tsk->portid); | |
2202 | sk->sk_state_change(sk); | |
f40acbaf | 2203 | return true; |
7e6c131e | 2204 | default: |
438adcaf | 2205 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 2206 | } |
39fdc9c7 JM |
2207 | /* Abort connection setup attempt */ |
2208 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2209 | sk->sk_err = ECONNREFUSED; | |
2210 | sk->sk_state_change(sk); | |
2211 | return true; | |
7e6c131e YX |
2212 | } |
2213 | ||
aba79f33 YX |
2214 | /** |
2215 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
2216 | * @sk: socket | |
10724cc7 | 2217 | * @skb: message |
aba79f33 | 2218 | * |
10724cc7 JPM |
2219 | * For connection oriented messages, irrespective of importance, |
2220 | * default queue limit is 2 MB. | |
aba79f33 | 2221 | * |
10724cc7 JPM |
2222 | * For connectionless messages, queue limits are based on message |
2223 | * importance as follows: | |
aba79f33 | 2224 | * |
10724cc7 JPM |
2225 | * TIPC_LOW_IMPORTANCE (2 MB) |
2226 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
2227 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
2228 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
2229 | * |
2230 | * Returns overload limit according to corresponding message importance | |
2231 | */ | |
10724cc7 | 2232 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 2233 | { |
10724cc7 JPM |
2234 | struct tipc_sock *tsk = tipc_sk(sk); |
2235 | struct tipc_msg *hdr = buf_msg(skb); | |
2236 | ||
b7d42635 | 2237 | if (unlikely(msg_in_group(hdr))) |
8265792b | 2238 | return READ_ONCE(sk->sk_rcvbuf); |
b7d42635 | 2239 | |
10724cc7 | 2240 | if (unlikely(!msg_connected(hdr))) |
8265792b | 2241 | return READ_ONCE(sk->sk_rcvbuf) << msg_importance(hdr); |
aba79f33 | 2242 | |
10724cc7 | 2243 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
8265792b | 2244 | return READ_ONCE(sk->sk_rcvbuf); |
0cee6bbe | 2245 | |
10724cc7 | 2246 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
2247 | } |
2248 | ||
c4307285 | 2249 | /** |
64ac5f59 | 2250 | * tipc_sk_filter_rcv - validate incoming message |
0c3141e9 | 2251 | * @sk: socket |
cda3696d | 2252 | * @skb: pointer to message. |
c4307285 | 2253 | * |
0c3141e9 AS |
2254 | * Enqueues message on receive queue if acceptable; optionally handles |
2255 | * disconnect indication for a connected socket. | |
2256 | * | |
1186adf7 | 2257 | * Called with socket lock already taken |
c4307285 | 2258 | * |
b97bf3fd | 2259 | */ |
64ac5f59 JM |
2260 | static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb, |
2261 | struct sk_buff_head *xmitq) | |
b97bf3fd | 2262 | { |
64ac5f59 | 2263 | bool sk_conn = !tipc_sk_type_connectionless(sk); |
58ed9442 | 2264 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2265 | struct tipc_group *grp = tsk->group; |
cda3696d | 2266 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
2267 | struct net *net = sock_net(sk); |
2268 | struct sk_buff_head inputq; | |
77d5ad40 | 2269 | int mtyp = msg_type(hdr); |
64ac5f59 | 2270 | int limit, err = TIPC_OK; |
ec8a2e56 | 2271 | |
01e661eb | 2272 | trace_tipc_sk_filter_rcv(sk, skb, TIPC_DUMP_ALL, " "); |
64ac5f59 JM |
2273 | TIPC_SKB_CB(skb)->bytes_read = 0; |
2274 | __skb_queue_head_init(&inputq); | |
2275 | __skb_queue_tail(&inputq, skb); | |
50100a5e | 2276 | |
64ac5f59 JM |
2277 | if (unlikely(!msg_isdata(hdr))) |
2278 | tipc_sk_proto_rcv(sk, &inputq, xmitq); | |
0c3141e9 | 2279 | |
75da2163 JM |
2280 | if (unlikely(grp)) |
2281 | tipc_group_filter_msg(grp, &inputq, xmitq); | |
2282 | ||
77d5ad40 | 2283 | if (unlikely(!grp) && mtyp == TIPC_MCAST_MSG) |
08e046c8 | 2284 | tipc_mcast_filter_msg(net, &tsk->mc_method.deferredq, &inputq); |
c55c8eda | 2285 | |
64ac5f59 JM |
2286 | /* Validate and add to receive buffer if there is space */ |
2287 | while ((skb = __skb_dequeue(&inputq))) { | |
2288 | hdr = buf_msg(skb); | |
2289 | limit = rcvbuf_limit(sk, skb); | |
c7268589 | 2290 | if ((sk_conn && !tipc_sk_filter_connect(tsk, skb, xmitq)) || |
75da2163 JM |
2291 | (!sk_conn && msg_connected(hdr)) || |
2292 | (!grp && msg_in_group(hdr))) | |
cda3696d | 2293 | err = TIPC_ERR_NO_PORT; |
872619d8 | 2294 | else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) { |
01e661eb TL |
2295 | trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL, |
2296 | "err_overload2!"); | |
872619d8 | 2297 | atomic_inc(&sk->sk_drops); |
64ac5f59 | 2298 | err = TIPC_ERR_OVERLOAD; |
872619d8 | 2299 | } |
b97bf3fd | 2300 | |
64ac5f59 | 2301 | if (unlikely(err)) { |
01e661eb TL |
2302 | if (tipc_msg_reverse(tipc_own_addr(net), &skb, err)) { |
2303 | trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_NONE, | |
2304 | "@filter_rcv!"); | |
2305 | __skb_queue_tail(xmitq, skb); | |
2306 | } | |
64ac5f59 JM |
2307 | err = TIPC_OK; |
2308 | continue; | |
2309 | } | |
2310 | __skb_queue_tail(&sk->sk_receive_queue, skb); | |
2311 | skb_set_owner_r(skb, sk); | |
01e661eb TL |
2312 | trace_tipc_sk_overlimit2(sk, skb, TIPC_DUMP_ALL, |
2313 | "rcvq >90% allocated!"); | |
64ac5f59 | 2314 | sk->sk_data_ready(sk); |
cda3696d | 2315 | } |
0c3141e9 | 2316 | } |
b97bf3fd | 2317 | |
0c3141e9 | 2318 | /** |
64ac5f59 | 2319 | * tipc_sk_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 2320 | * @sk: socket |
a6ca1094 | 2321 | * @skb: message |
0c3141e9 | 2322 | * |
e3a77561 | 2323 | * Caller must hold socket lock |
0c3141e9 | 2324 | */ |
64ac5f59 | 2325 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 2326 | { |
64ac5f59 | 2327 | unsigned int before = sk_rmem_alloc_get(sk); |
f1d048f2 | 2328 | struct sk_buff_head xmitq; |
64ac5f59 | 2329 | unsigned int added; |
0c3141e9 | 2330 | |
f1d048f2 JPM |
2331 | __skb_queue_head_init(&xmitq); |
2332 | ||
64ac5f59 JM |
2333 | tipc_sk_filter_rcv(sk, skb, &xmitq); |
2334 | added = sk_rmem_alloc_get(sk) - before; | |
2335 | atomic_add(added, &tipc_sk(sk)->dupl_rcvcnt); | |
f1d048f2 | 2336 | |
64ac5f59 | 2337 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2338 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
0c3141e9 AS |
2339 | return 0; |
2340 | } | |
2341 | ||
d570d864 | 2342 | /** |
c637c103 JPM |
2343 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
2344 | * inputq and try adding them to socket or backlog queue | |
2345 | * @inputq: list of incoming buffers with potentially different destinations | |
2346 | * @sk: socket where the buffers should be enqueued | |
2347 | * @dport: port number for the socket | |
d570d864 JPM |
2348 | * |
2349 | * Caller must hold socket lock | |
d570d864 | 2350 | */ |
cda3696d | 2351 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 2352 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 2353 | { |
f1d048f2 JPM |
2354 | unsigned long time_limit = jiffies + 2; |
2355 | struct sk_buff *skb; | |
d570d864 JPM |
2356 | unsigned int lim; |
2357 | atomic_t *dcnt; | |
f1d048f2 | 2358 | u32 onode; |
c637c103 JPM |
2359 | |
2360 | while (skb_queue_len(inputq)) { | |
51a00daf | 2361 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
2362 | return; |
2363 | ||
c637c103 JPM |
2364 | skb = tipc_skb_dequeue(inputq, dport); |
2365 | if (unlikely(!skb)) | |
cda3696d JPM |
2366 | return; |
2367 | ||
2368 | /* Add message directly to receive queue if possible */ | |
c637c103 | 2369 | if (!sock_owned_by_user(sk)) { |
64ac5f59 | 2370 | tipc_sk_filter_rcv(sk, skb, xmitq); |
cda3696d | 2371 | continue; |
c637c103 | 2372 | } |
cda3696d JPM |
2373 | |
2374 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 2375 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 2376 | if (!sk->sk_backlog.len) |
c637c103 JPM |
2377 | atomic_set(dcnt, 0); |
2378 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
01e661eb TL |
2379 | if (likely(!sk_add_backlog(sk, skb, lim))) { |
2380 | trace_tipc_sk_overlimit1(sk, skb, TIPC_DUMP_ALL, | |
2381 | "bklg & rcvq >90% allocated!"); | |
c637c103 | 2382 | continue; |
01e661eb | 2383 | } |
cda3696d | 2384 | |
01e661eb | 2385 | trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL, "err_overload!"); |
cda3696d | 2386 | /* Overload => reject message back to sender */ |
f1d048f2 | 2387 | onode = tipc_own_addr(sock_net(sk)); |
872619d8 | 2388 | atomic_inc(&sk->sk_drops); |
01e661eb TL |
2389 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) { |
2390 | trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_ALL, | |
2391 | "@sk_enqueue!"); | |
f1d048f2 | 2392 | __skb_queue_tail(xmitq, skb); |
01e661eb | 2393 | } |
cda3696d | 2394 | break; |
c637c103 | 2395 | } |
d570d864 JPM |
2396 | } |
2397 | ||
0c3141e9 | 2398 | /** |
c637c103 JPM |
2399 | * tipc_sk_rcv - handle a chain of incoming buffers |
2400 | * @inputq: buffer list containing the buffers | |
2401 | * Consumes all buffers in list until inputq is empty | |
2402 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 2403 | */ |
cda3696d | 2404 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 2405 | { |
f1d048f2 | 2406 | struct sk_buff_head xmitq; |
c637c103 | 2407 | u32 dnode, dport = 0; |
9871b27f | 2408 | int err; |
9816f061 | 2409 | struct tipc_sock *tsk; |
9816f061 | 2410 | struct sock *sk; |
cda3696d | 2411 | struct sk_buff *skb; |
9816f061 | 2412 | |
f1d048f2 | 2413 | __skb_queue_head_init(&xmitq); |
c637c103 | 2414 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
2415 | dport = tipc_skb_peek_port(inputq, dport); |
2416 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 2417 | |
c637c103 JPM |
2418 | if (likely(tsk)) { |
2419 | sk = &tsk->sk; | |
2420 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 2421 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 2422 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 2423 | } |
f1d048f2 | 2424 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2425 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
c637c103 | 2426 | sock_put(sk); |
c637c103 | 2427 | continue; |
c637c103 | 2428 | } |
cda3696d JPM |
2429 | /* No destination socket => dequeue skb if still there */ |
2430 | skb = tipc_skb_dequeue(inputq, dport); | |
2431 | if (!skb) | |
2432 | return; | |
2433 | ||
2434 | /* Try secondary lookup if unresolved named message */ | |
2435 | err = TIPC_ERR_NO_PORT; | |
2436 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
2437 | goto xmit; | |
2438 | ||
2439 | /* Prepare for message rejection */ | |
2440 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 2441 | continue; |
01e661eb TL |
2442 | |
2443 | trace_tipc_sk_rej_msg(NULL, skb, TIPC_DUMP_NONE, "@sk_rcv!"); | |
e3a77561 | 2444 | xmit: |
cda3696d | 2445 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 2446 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 2447 | } |
b97bf3fd PL |
2448 | } |
2449 | ||
78eb3a53 YX |
2450 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
2451 | { | |
d9dc8b0f | 2452 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 2453 | struct sock *sk = sock->sk; |
78eb3a53 YX |
2454 | int done; |
2455 | ||
2456 | do { | |
2457 | int err = sock_error(sk); | |
2458 | if (err) | |
2459 | return err; | |
2460 | if (!*timeo_p) | |
2461 | return -ETIMEDOUT; | |
2462 | if (signal_pending(current)) | |
2463 | return sock_intr_errno(*timeo_p); | |
5391a877 TL |
2464 | if (sk->sk_state == TIPC_DISCONNECTING) |
2465 | break; | |
78eb3a53 | 2466 | |
d9dc8b0f | 2467 | add_wait_queue(sk_sleep(sk), &wait); |
9546a0b7 TL |
2468 | done = sk_wait_event(sk, timeo_p, tipc_sk_connected(sk), |
2469 | &wait); | |
d9dc8b0f | 2470 | remove_wait_queue(sk_sleep(sk), &wait); |
78eb3a53 YX |
2471 | } while (!done); |
2472 | return 0; | |
2473 | } | |
2474 | ||
ea239314 EH |
2475 | static bool tipc_sockaddr_is_sane(struct sockaddr_tipc *addr) |
2476 | { | |
2477 | if (addr->family != AF_TIPC) | |
2478 | return false; | |
2479 | if (addr->addrtype == TIPC_SERVICE_RANGE) | |
2480 | return (addr->addr.nameseq.lower <= addr->addr.nameseq.upper); | |
2481 | return (addr->addrtype == TIPC_SERVICE_ADDR || | |
2482 | addr->addrtype == TIPC_SOCKET_ADDR); | |
2483 | } | |
2484 | ||
b97bf3fd | 2485 | /** |
247f0f3c | 2486 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
2487 | * @sock: socket structure |
2488 | * @dest: socket address for destination port | |
2489 | * @destlen: size of socket address data structure | |
0c3141e9 | 2490 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
2491 | * |
2492 | * Returns 0 on success, errno otherwise | |
2493 | */ | |
247f0f3c YX |
2494 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
2495 | int destlen, int flags) | |
b97bf3fd | 2496 | { |
0c3141e9 | 2497 | struct sock *sk = sock->sk; |
f2f8036e | 2498 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
2499 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
2500 | struct msghdr m = {NULL,}; | |
f2f8036e | 2501 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 2502 | int previous; |
f2f8036e | 2503 | int res = 0; |
b89741a0 | 2504 | |
23998835 JM |
2505 | if (destlen != sizeof(struct sockaddr_tipc)) |
2506 | return -EINVAL; | |
2507 | ||
0c3141e9 AS |
2508 | lock_sock(sk); |
2509 | ||
75da2163 JM |
2510 | if (tsk->group) { |
2511 | res = -EINVAL; | |
2512 | goto exit; | |
2513 | } | |
2514 | ||
23998835 JM |
2515 | if (dst->family == AF_UNSPEC) { |
2516 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); | |
2517 | if (!tipc_sk_type_connectionless(sk)) | |
610600c8 | 2518 | res = -EINVAL; |
0c3141e9 AS |
2519 | goto exit; |
2520 | } | |
ea239314 | 2521 | if (!tipc_sockaddr_is_sane(dst)) { |
0c3141e9 | 2522 | res = -EINVAL; |
23998835 | 2523 | goto exit; |
ea239314 | 2524 | } |
23998835 JM |
2525 | /* DGRAM/RDM connect(), just save the destaddr */ |
2526 | if (tipc_sk_type_connectionless(sk)) { | |
2527 | memcpy(&tsk->peer, dest, destlen); | |
0c3141e9 | 2528 | goto exit; |
ea239314 EH |
2529 | } else if (dst->addrtype == TIPC_SERVICE_RANGE) { |
2530 | res = -EINVAL; | |
2531 | goto exit; | |
0c3141e9 AS |
2532 | } |
2533 | ||
99a20889 | 2534 | previous = sk->sk_state; |
438adcaf PB |
2535 | |
2536 | switch (sk->sk_state) { | |
2537 | case TIPC_OPEN: | |
584d24b3 YX |
2538 | /* Send a 'SYN-' to destination */ |
2539 | m.msg_name = dest; | |
2540 | m.msg_namelen = destlen; | |
2541 | ||
2542 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
2543 | * indicate send_msg() is never blocked. | |
2544 | */ | |
2545 | if (!timeout) | |
2546 | m.msg_flags = MSG_DONTWAIT; | |
2547 | ||
39a0295f | 2548 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
2549 | if ((res < 0) && (res != -EWOULDBLOCK)) |
2550 | goto exit; | |
2551 | ||
99a20889 | 2552 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
2553 | * difference is that return value in non-blocking |
2554 | * case is EINPROGRESS, rather than EALREADY. | |
2555 | */ | |
2556 | res = -EINPROGRESS; | |
f79e3365 | 2557 | /* fall through */ |
99a20889 PB |
2558 | case TIPC_CONNECTING: |
2559 | if (!timeout) { | |
2560 | if (previous == TIPC_CONNECTING) | |
2561 | res = -EALREADY; | |
78eb3a53 | 2562 | goto exit; |
99a20889 | 2563 | } |
78eb3a53 YX |
2564 | timeout = msecs_to_jiffies(timeout); |
2565 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
2566 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
2567 | break; |
2568 | case TIPC_ESTABLISHED: | |
584d24b3 | 2569 | res = -EISCONN; |
f40acbaf PB |
2570 | break; |
2571 | default: | |
584d24b3 | 2572 | res = -EINVAL; |
f40acbaf | 2573 | } |
99a20889 | 2574 | |
0c3141e9 AS |
2575 | exit: |
2576 | release_sock(sk); | |
b89741a0 | 2577 | return res; |
b97bf3fd PL |
2578 | } |
2579 | ||
c4307285 | 2580 | /** |
247f0f3c | 2581 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
2582 | * @sock: socket structure |
2583 | * @len: (unused) | |
c4307285 | 2584 | * |
b97bf3fd PL |
2585 | * Returns 0 on success, errno otherwise |
2586 | */ | |
247f0f3c | 2587 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 2588 | { |
0c3141e9 AS |
2589 | struct sock *sk = sock->sk; |
2590 | int res; | |
2591 | ||
2592 | lock_sock(sk); | |
0c288c86 | 2593 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 2594 | release_sock(sk); |
0c288c86 | 2595 | |
0c3141e9 | 2596 | return res; |
b97bf3fd PL |
2597 | } |
2598 | ||
6398e23c YX |
2599 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2600 | { | |
2601 | struct sock *sk = sock->sk; | |
2602 | DEFINE_WAIT(wait); | |
2603 | int err; | |
2604 | ||
2605 | /* True wake-one mechanism for incoming connections: only | |
2606 | * one process gets woken up, not the 'whole herd'. | |
2607 | * Since we do not 'race & poll' for established sockets | |
2608 | * anymore, the common case will execute the loop only once. | |
2609 | */ | |
2610 | for (;;) { | |
2611 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2612 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2613 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2614 | release_sock(sk); |
2615 | timeo = schedule_timeout(timeo); | |
2616 | lock_sock(sk); | |
2617 | } | |
2618 | err = 0; | |
2619 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2620 | break; | |
6398e23c YX |
2621 | err = -EAGAIN; |
2622 | if (!timeo) | |
2623 | break; | |
143fe22f EH |
2624 | err = sock_intr_errno(timeo); |
2625 | if (signal_pending(current)) | |
2626 | break; | |
6398e23c YX |
2627 | } |
2628 | finish_wait(sk_sleep(sk), &wait); | |
2629 | return err; | |
2630 | } | |
2631 | ||
c4307285 | 2632 | /** |
247f0f3c | 2633 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2634 | * @sock: listening socket |
2635 | * @newsock: new socket that is to be connected | |
2636 | * @flags: file-related flags associated with socket | |
c4307285 | 2637 | * |
b97bf3fd PL |
2638 | * Returns 0 on success, errno otherwise |
2639 | */ | |
cdfbabfb DH |
2640 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
2641 | bool kern) | |
b97bf3fd | 2642 | { |
0fef8f20 | 2643 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2644 | struct sk_buff *buf; |
301bae56 | 2645 | struct tipc_sock *new_tsock; |
0fef8f20 | 2646 | struct tipc_msg *msg; |
6398e23c | 2647 | long timeo; |
0c3141e9 | 2648 | int res; |
b97bf3fd | 2649 | |
0c3141e9 | 2650 | lock_sock(sk); |
b97bf3fd | 2651 | |
0c288c86 | 2652 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2653 | res = -EINVAL; |
b97bf3fd PL |
2654 | goto exit; |
2655 | } | |
6398e23c YX |
2656 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2657 | res = tipc_wait_for_accept(sock, timeo); | |
2658 | if (res) | |
2659 | goto exit; | |
0c3141e9 AS |
2660 | |
2661 | buf = skb_peek(&sk->sk_receive_queue); | |
2662 | ||
cdfbabfb | 2663 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern); |
0fef8f20 PG |
2664 | if (res) |
2665 | goto exit; | |
fdd75ea8 | 2666 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2667 | |
0fef8f20 | 2668 | new_sk = new_sock->sk; |
301bae56 | 2669 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2670 | msg = buf_msg(buf); |
b97bf3fd | 2671 | |
0fef8f20 PG |
2672 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2673 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2674 | ||
2675 | /* | |
2676 | * Reject any stray messages received by new socket | |
2677 | * before the socket lock was taken (very, very unlikely) | |
2678 | */ | |
49afb806 | 2679 | tsk_rej_rx_queue(new_sk, TIPC_ERR_NO_PORT); |
0fef8f20 PG |
2680 | |
2681 | /* Connect new socket to it's peer */ | |
301bae56 | 2682 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2683 | |
301bae56 | 2684 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2685 | if (msg_named(msg)) { |
301bae56 JPM |
2686 | new_tsock->conn_type = msg_nametype(msg); |
2687 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2688 | } |
0fef8f20 PG |
2689 | |
2690 | /* | |
2691 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2692 | * Respond to 'SYN+' by queuing it on new socket. | |
2693 | */ | |
2694 | if (!msg_data_sz(msg)) { | |
2695 | struct msghdr m = {NULL,}; | |
2696 | ||
2e84c60b | 2697 | tsk_advance_rx_queue(sk); |
365ad353 | 2698 | __tipc_sendstream(new_sock, &m, 0); |
0fef8f20 PG |
2699 | } else { |
2700 | __skb_dequeue(&sk->sk_receive_queue); | |
2701 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2702 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2703 | } |
2704 | release_sock(new_sk); | |
b97bf3fd | 2705 | exit: |
0c3141e9 | 2706 | release_sock(sk); |
b97bf3fd PL |
2707 | return res; |
2708 | } | |
2709 | ||
2710 | /** | |
247f0f3c | 2711 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2712 | * @sock: socket structure |
e247a8f5 | 2713 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2714 | * |
2715 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2716 | * |
b97bf3fd PL |
2717 | * Returns 0 on success, errno otherwise |
2718 | */ | |
247f0f3c | 2719 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2720 | { |
0c3141e9 | 2721 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2722 | int res; |
2723 | ||
e247a8f5 AS |
2724 | if (how != SHUT_RDWR) |
2725 | return -EINVAL; | |
b97bf3fd | 2726 | |
0c3141e9 | 2727 | lock_sock(sk); |
b97bf3fd | 2728 | |
01e661eb | 2729 | trace_tipc_sk_shutdown(sk, NULL, TIPC_DUMP_ALL, " "); |
6f00089c PB |
2730 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2731 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2732 | |
6f00089c | 2733 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2734 | /* Discard any unreceived messages */ |
57467e56 | 2735 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2736 | |
2737 | /* Wake up anyone sleeping in poll */ | |
2738 | sk->sk_state_change(sk); | |
b97bf3fd | 2739 | res = 0; |
6f00089c | 2740 | } else { |
b97bf3fd PL |
2741 | res = -ENOTCONN; |
2742 | } | |
2743 | ||
0c3141e9 | 2744 | release_sock(sk); |
b97bf3fd PL |
2745 | return res; |
2746 | } | |
2747 | ||
afe8792f JM |
2748 | static void tipc_sk_check_probing_state(struct sock *sk, |
2749 | struct sk_buff_head *list) | |
2750 | { | |
2751 | struct tipc_sock *tsk = tipc_sk(sk); | |
2752 | u32 pnode = tsk_peer_node(tsk); | |
2753 | u32 pport = tsk_peer_port(tsk); | |
2754 | u32 self = tsk_own_node(tsk); | |
2755 | u32 oport = tsk->portid; | |
2756 | struct sk_buff *skb; | |
2757 | ||
2758 | if (tsk->probe_unacked) { | |
2759 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2760 | sk->sk_err = ECONNABORTED; | |
2761 | tipc_node_remove_conn(sock_net(sk), pnode, pport); | |
2762 | sk->sk_state_change(sk); | |
2763 | return; | |
2764 | } | |
2765 | /* Prepare new probe */ | |
2766 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0, | |
2767 | pnode, self, pport, oport, TIPC_OK); | |
2768 | if (skb) | |
2769 | __skb_queue_tail(list, skb); | |
2770 | tsk->probe_unacked = true; | |
2771 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); | |
2772 | } | |
2773 | ||
67879274 TN |
2774 | static void tipc_sk_retry_connect(struct sock *sk, struct sk_buff_head *list) |
2775 | { | |
2776 | struct tipc_sock *tsk = tipc_sk(sk); | |
2777 | ||
2778 | /* Try again later if dest link is congested */ | |
2779 | if (tsk->cong_link_cnt) { | |
2780 | sk_reset_timer(sk, &sk->sk_timer, msecs_to_jiffies(100)); | |
2781 | return; | |
2782 | } | |
2783 | /* Prepare SYN for retransmit */ | |
2784 | tipc_msg_skb_clone(&sk->sk_write_queue, list); | |
2785 | } | |
2786 | ||
31b102bb | 2787 | static void tipc_sk_timeout(struct timer_list *t) |
57289015 | 2788 | { |
31b102bb KC |
2789 | struct sock *sk = from_timer(sk, t, sk_timer); |
2790 | struct tipc_sock *tsk = tipc_sk(sk); | |
afe8792f JM |
2791 | u32 pnode = tsk_peer_node(tsk); |
2792 | struct sk_buff_head list; | |
67879274 | 2793 | int rc = 0; |
57289015 | 2794 | |
e654f9f5 | 2795 | __skb_queue_head_init(&list); |
6c9808ce | 2796 | bh_lock_sock(sk); |
0d5fcebf JM |
2797 | |
2798 | /* Try again later if socket is busy */ | |
2799 | if (sock_owned_by_user(sk)) { | |
2800 | sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20); | |
afe8792f | 2801 | bh_unlock_sock(sk); |
91a4a3eb | 2802 | sock_put(sk); |
afe8792f | 2803 | return; |
57289015 | 2804 | } |
57289015 | 2805 | |
afe8792f JM |
2806 | if (sk->sk_state == TIPC_ESTABLISHED) |
2807 | tipc_sk_check_probing_state(sk, &list); | |
67879274 TN |
2808 | else if (sk->sk_state == TIPC_CONNECTING) |
2809 | tipc_sk_retry_connect(sk, &list); | |
afe8792f | 2810 | |
57289015 | 2811 | bh_unlock_sock(sk); |
afe8792f JM |
2812 | |
2813 | if (!skb_queue_empty(&list)) | |
67879274 | 2814 | rc = tipc_node_xmit(sock_net(sk), &list, pnode, tsk->portid); |
afe8792f | 2815 | |
67879274 TN |
2816 | /* SYN messages may cause link congestion */ |
2817 | if (rc == -ELINKCONG) { | |
2818 | tipc_dest_push(&tsk->cong_links, pnode, 0); | |
2819 | tsk->cong_link_cnt = 1; | |
2820 | } | |
07f6c4bc | 2821 | sock_put(sk); |
57289015 JPM |
2822 | } |
2823 | ||
301bae56 | 2824 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2825 | struct tipc_name_seq const *seq) |
2826 | { | |
d6fb7e9c PB |
2827 | struct sock *sk = &tsk->sk; |
2828 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2829 | struct publication *publ; |
2830 | u32 key; | |
2831 | ||
928df188 JM |
2832 | if (scope != TIPC_NODE_SCOPE) |
2833 | scope = TIPC_CLUSTER_SCOPE; | |
2834 | ||
d6fb7e9c | 2835 | if (tipc_sk_connected(sk)) |
0fc87aae | 2836 | return -EINVAL; |
07f6c4bc YX |
2837 | key = tsk->portid + tsk->pub_count + 1; |
2838 | if (key == tsk->portid) | |
0fc87aae JPM |
2839 | return -EADDRINUSE; |
2840 | ||
f2f9800d | 2841 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2842 | scope, tsk->portid, key); |
0fc87aae JPM |
2843 | if (unlikely(!publ)) |
2844 | return -EINVAL; | |
2845 | ||
e50e73e1 | 2846 | list_add(&publ->binding_sock, &tsk->publications); |
301bae56 JPM |
2847 | tsk->pub_count++; |
2848 | tsk->published = 1; | |
0fc87aae JPM |
2849 | return 0; |
2850 | } | |
2851 | ||
301bae56 | 2852 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2853 | struct tipc_name_seq const *seq) |
2854 | { | |
f2f9800d | 2855 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2856 | struct publication *publ; |
2857 | struct publication *safe; | |
2858 | int rc = -EINVAL; | |
2859 | ||
928df188 JM |
2860 | if (scope != TIPC_NODE_SCOPE) |
2861 | scope = TIPC_CLUSTER_SCOPE; | |
2862 | ||
e50e73e1 | 2863 | list_for_each_entry_safe(publ, safe, &tsk->publications, binding_sock) { |
0fc87aae JPM |
2864 | if (seq) { |
2865 | if (publ->scope != scope) | |
2866 | continue; | |
2867 | if (publ->type != seq->type) | |
2868 | continue; | |
2869 | if (publ->lower != seq->lower) | |
2870 | continue; | |
2871 | if (publ->upper != seq->upper) | |
2872 | break; | |
f2f9800d | 2873 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
37922ea4 | 2874 | publ->upper, publ->key); |
0fc87aae JPM |
2875 | rc = 0; |
2876 | break; | |
2877 | } | |
f2f9800d | 2878 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
37922ea4 | 2879 | publ->upper, publ->key); |
0fc87aae JPM |
2880 | rc = 0; |
2881 | } | |
301bae56 JPM |
2882 | if (list_empty(&tsk->publications)) |
2883 | tsk->published = 0; | |
0fc87aae JPM |
2884 | return rc; |
2885 | } | |
2886 | ||
5a9ee0be JPM |
2887 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2888 | * when we go from standalone to network mode. | |
2889 | */ | |
e05b31f4 | 2890 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2891 | { |
e05b31f4 | 2892 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
40f9f439 | 2893 | struct rhashtable_iter iter; |
07f6c4bc | 2894 | struct tipc_sock *tsk; |
5a9ee0be | 2895 | struct tipc_msg *msg; |
5a9ee0be | 2896 | |
40f9f439 HX |
2897 | rhashtable_walk_enter(&tn->sk_rht, &iter); |
2898 | ||
2899 | do { | |
97a6ec4a | 2900 | rhashtable_walk_start(&iter); |
40f9f439 HX |
2901 | |
2902 | while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) { | |
15ef70e2 CW |
2903 | sock_hold(&tsk->sk); |
2904 | rhashtable_walk_stop(&iter); | |
2905 | lock_sock(&tsk->sk); | |
07f6c4bc | 2906 | msg = &tsk->phdr; |
23fd3eac JM |
2907 | msg_set_prevnode(msg, tipc_own_addr(net)); |
2908 | msg_set_orignode(msg, tipc_own_addr(net)); | |
15ef70e2 CW |
2909 | release_sock(&tsk->sk); |
2910 | rhashtable_walk_start(&iter); | |
2911 | sock_put(&tsk->sk); | |
07f6c4bc | 2912 | } |
97a6ec4a | 2913 | |
40f9f439 HX |
2914 | rhashtable_walk_stop(&iter); |
2915 | } while (tsk == ERR_PTR(-EAGAIN)); | |
bd583fe3 CW |
2916 | |
2917 | rhashtable_walk_exit(&iter); | |
5a9ee0be JPM |
2918 | } |
2919 | ||
e05b31f4 | 2920 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2921 | { |
e05b31f4 | 2922 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2923 | struct tipc_sock *tsk; |
808d90f9 | 2924 | |
07f6c4bc | 2925 | rcu_read_lock(); |
ab818362 | 2926 | tsk = rhashtable_lookup(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2927 | if (tsk) |
2928 | sock_hold(&tsk->sk); | |
2929 | rcu_read_unlock(); | |
808d90f9 | 2930 | |
07f6c4bc | 2931 | return tsk; |
808d90f9 JPM |
2932 | } |
2933 | ||
07f6c4bc | 2934 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2935 | { |
e05b31f4 YX |
2936 | struct sock *sk = &tsk->sk; |
2937 | struct net *net = sock_net(sk); | |
2938 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2939 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2940 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2941 | |
07f6c4bc YX |
2942 | while (remaining--) { |
2943 | portid++; | |
2944 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2945 | portid = TIPC_MIN_PORT; | |
2946 | tsk->portid = portid; | |
2947 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2948 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2949 | tsk_rht_params)) | |
07f6c4bc YX |
2950 | return 0; |
2951 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2952 | } |
2953 | ||
07f6c4bc | 2954 | return -1; |
808d90f9 JPM |
2955 | } |
2956 | ||
07f6c4bc | 2957 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2958 | { |
07f6c4bc | 2959 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2960 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2961 | |
6cca7289 | 2962 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
41c6d650 | 2963 | WARN_ON(refcount_read(&sk->sk_refcnt) == 1); |
07f6c4bc | 2964 | __sock_put(sk); |
808d90f9 | 2965 | } |
808d90f9 JPM |
2966 | } |
2967 | ||
6cca7289 HX |
2968 | static const struct rhashtable_params tsk_rht_params = { |
2969 | .nelem_hint = 192, | |
2970 | .head_offset = offsetof(struct tipc_sock, node), | |
2971 | .key_offset = offsetof(struct tipc_sock, portid), | |
2972 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2973 | .max_size = 1048576, |
2974 | .min_size = 256, | |
b5e2c150 | 2975 | .automatic_shrinking = true, |
6cca7289 HX |
2976 | }; |
2977 | ||
e05b31f4 | 2978 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2979 | { |
e05b31f4 | 2980 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2981 | |
2982 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2983 | } |
2984 | ||
e05b31f4 | 2985 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2986 | { |
e05b31f4 YX |
2987 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2988 | ||
07f6c4bc YX |
2989 | /* Wait for socket readers to complete */ |
2990 | synchronize_net(); | |
808d90f9 | 2991 | |
e05b31f4 | 2992 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2993 | } |
2994 | ||
75da2163 JM |
2995 | static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq) |
2996 | { | |
2997 | struct net *net = sock_net(&tsk->sk); | |
75da2163 JM |
2998 | struct tipc_group *grp = tsk->group; |
2999 | struct tipc_msg *hdr = &tsk->phdr; | |
3000 | struct tipc_name_seq seq; | |
3001 | int rc; | |
3002 | ||
3003 | if (mreq->type < TIPC_RESERVED_TYPES) | |
3004 | return -EACCES; | |
232d07b7 JM |
3005 | if (mreq->scope > TIPC_NODE_SCOPE) |
3006 | return -EINVAL; | |
75da2163 JM |
3007 | if (grp) |
3008 | return -EACCES; | |
60c25306 | 3009 | grp = tipc_group_create(net, tsk->portid, mreq, &tsk->group_is_open); |
75da2163 JM |
3010 | if (!grp) |
3011 | return -ENOMEM; | |
3012 | tsk->group = grp; | |
3013 | msg_set_lookup_scope(hdr, mreq->scope); | |
3014 | msg_set_nametype(hdr, mreq->type); | |
3015 | msg_set_dest_droppable(hdr, true); | |
3016 | seq.type = mreq->type; | |
3017 | seq.lower = mreq->instance; | |
3018 | seq.upper = seq.lower; | |
232d07b7 | 3019 | tipc_nametbl_build_group(net, grp, mreq->type, mreq->scope); |
75da2163 | 3020 | rc = tipc_sk_publish(tsk, mreq->scope, &seq); |
e233df01 | 3021 | if (rc) { |
75da2163 | 3022 | tipc_group_delete(net, grp); |
e233df01 | 3023 | tsk->group = NULL; |
febafc84 | 3024 | return rc; |
e233df01 | 3025 | } |
d12d2e12 | 3026 | /* Eliminate any risk that a broadcast overtakes sent JOINs */ |
399574d4 JM |
3027 | tsk->mc_method.rcast = true; |
3028 | tsk->mc_method.mandatory = true; | |
d12d2e12 | 3029 | tipc_group_join(net, grp, &tsk->sk.sk_rcvbuf); |
75da2163 JM |
3030 | return rc; |
3031 | } | |
3032 | ||
3033 | static int tipc_sk_leave(struct tipc_sock *tsk) | |
3034 | { | |
3035 | struct net *net = sock_net(&tsk->sk); | |
3036 | struct tipc_group *grp = tsk->group; | |
3037 | struct tipc_name_seq seq; | |
3038 | int scope; | |
3039 | ||
3040 | if (!grp) | |
3041 | return -EINVAL; | |
3042 | tipc_group_self(grp, &seq, &scope); | |
3043 | tipc_group_delete(net, grp); | |
3044 | tsk->group = NULL; | |
3045 | tipc_sk_withdraw(tsk, scope, &seq); | |
3046 | return 0; | |
3047 | } | |
3048 | ||
b97bf3fd | 3049 | /** |
247f0f3c | 3050 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
3051 | * @sock: socket structure |
3052 | * @lvl: option level | |
3053 | * @opt: option identifier | |
3054 | * @ov: pointer to new option value | |
3055 | * @ol: length of option value | |
c4307285 YH |
3056 | * |
3057 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 3058 | * (to ease compatibility). |
c4307285 | 3059 | * |
b97bf3fd PL |
3060 | * Returns 0 on success, errno otherwise |
3061 | */ | |
247f0f3c YX |
3062 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
3063 | char __user *ov, unsigned int ol) | |
b97bf3fd | 3064 | { |
0c3141e9 | 3065 | struct sock *sk = sock->sk; |
58ed9442 | 3066 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 3067 | struct tipc_group_req mreq; |
01fd12bb | 3068 | u32 value = 0; |
a08ef476 | 3069 | int res = 0; |
b97bf3fd | 3070 | |
c4307285 YH |
3071 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
3072 | return 0; | |
b97bf3fd PL |
3073 | if (lvl != SOL_TIPC) |
3074 | return -ENOPROTOOPT; | |
01fd12bb JPM |
3075 | |
3076 | switch (opt) { | |
3077 | case TIPC_IMPORTANCE: | |
3078 | case TIPC_SRC_DROPPABLE: | |
3079 | case TIPC_DEST_DROPPABLE: | |
3080 | case TIPC_CONN_TIMEOUT: | |
c0bceb97 | 3081 | case TIPC_NODELAY: |
01fd12bb JPM |
3082 | if (ol < sizeof(value)) |
3083 | return -EINVAL; | |
75da2163 JM |
3084 | if (get_user(value, (u32 __user *)ov)) |
3085 | return -EFAULT; | |
3086 | break; | |
3087 | case TIPC_GROUP_JOIN: | |
3088 | if (ol < sizeof(mreq)) | |
3089 | return -EINVAL; | |
3090 | if (copy_from_user(&mreq, ov, sizeof(mreq))) | |
3091 | return -EFAULT; | |
01fd12bb JPM |
3092 | break; |
3093 | default: | |
3094 | if (ov || ol) | |
3095 | return -EINVAL; | |
3096 | } | |
b97bf3fd | 3097 | |
0c3141e9 | 3098 | lock_sock(sk); |
c4307285 | 3099 | |
b97bf3fd PL |
3100 | switch (opt) { |
3101 | case TIPC_IMPORTANCE: | |
301bae56 | 3102 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
3103 | break; |
3104 | case TIPC_SRC_DROPPABLE: | |
3105 | if (sock->type != SOCK_STREAM) | |
301bae56 | 3106 | tsk_set_unreliable(tsk, value); |
c4307285 | 3107 | else |
b97bf3fd PL |
3108 | res = -ENOPROTOOPT; |
3109 | break; | |
3110 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 3111 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
3112 | break; |
3113 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 3114 | tipc_sk(sk)->conn_timeout = value; |
b97bf3fd | 3115 | break; |
01fd12bb JPM |
3116 | case TIPC_MCAST_BROADCAST: |
3117 | tsk->mc_method.rcast = false; | |
3118 | tsk->mc_method.mandatory = true; | |
3119 | break; | |
3120 | case TIPC_MCAST_REPLICAST: | |
3121 | tsk->mc_method.rcast = true; | |
3122 | tsk->mc_method.mandatory = true; | |
3123 | break; | |
75da2163 JM |
3124 | case TIPC_GROUP_JOIN: |
3125 | res = tipc_sk_join(tsk, &mreq); | |
3126 | break; | |
3127 | case TIPC_GROUP_LEAVE: | |
3128 | res = tipc_sk_leave(tsk); | |
3129 | break; | |
c0bceb97 JM |
3130 | case TIPC_NODELAY: |
3131 | tsk->nodelay = !!value; | |
3132 | tsk_set_nagle(tsk); | |
3133 | break; | |
b97bf3fd PL |
3134 | default: |
3135 | res = -EINVAL; | |
3136 | } | |
3137 | ||
0c3141e9 AS |
3138 | release_sock(sk); |
3139 | ||
b97bf3fd PL |
3140 | return res; |
3141 | } | |
3142 | ||
3143 | /** | |
247f0f3c | 3144 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
3145 | * @sock: socket structure |
3146 | * @lvl: option level | |
3147 | * @opt: option identifier | |
3148 | * @ov: receptacle for option value | |
3149 | * @ol: receptacle for length of option value | |
c4307285 YH |
3150 | * |
3151 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 3152 | * (to ease compatibility). |
c4307285 | 3153 | * |
b97bf3fd PL |
3154 | * Returns 0 on success, errno otherwise |
3155 | */ | |
247f0f3c YX |
3156 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
3157 | char __user *ov, int __user *ol) | |
b97bf3fd | 3158 | { |
0c3141e9 | 3159 | struct sock *sk = sock->sk; |
58ed9442 | 3160 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 JM |
3161 | struct tipc_name_seq seq; |
3162 | int len, scope; | |
b97bf3fd | 3163 | u32 value; |
c4307285 | 3164 | int res; |
b97bf3fd | 3165 | |
c4307285 YH |
3166 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
3167 | return put_user(0, ol); | |
b97bf3fd PL |
3168 | if (lvl != SOL_TIPC) |
3169 | return -ENOPROTOOPT; | |
2db9983a AS |
3170 | res = get_user(len, ol); |
3171 | if (res) | |
c4307285 | 3172 | return res; |
b97bf3fd | 3173 | |
0c3141e9 | 3174 | lock_sock(sk); |
b97bf3fd PL |
3175 | |
3176 | switch (opt) { | |
3177 | case TIPC_IMPORTANCE: | |
301bae56 | 3178 | value = tsk_importance(tsk); |
b97bf3fd PL |
3179 | break; |
3180 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 3181 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
3182 | break; |
3183 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 3184 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
3185 | break; |
3186 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 3187 | value = tsk->conn_timeout; |
0c3141e9 | 3188 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 3189 | break; |
0e65967e | 3190 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 3191 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 3192 | break; |
0e65967e | 3193 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 3194 | value = skb_queue_len(&sk->sk_receive_queue); |
3195 | break; | |
42e5425a TN |
3196 | case TIPC_SOCK_RECVQ_USED: |
3197 | value = sk_rmem_alloc_get(sk); | |
3198 | break; | |
75da2163 JM |
3199 | case TIPC_GROUP_JOIN: |
3200 | seq.type = 0; | |
3201 | if (tsk->group) | |
3202 | tipc_group_self(tsk->group, &seq, &scope); | |
3203 | value = seq.type; | |
3204 | break; | |
b97bf3fd PL |
3205 | default: |
3206 | res = -EINVAL; | |
3207 | } | |
3208 | ||
0c3141e9 AS |
3209 | release_sock(sk); |
3210 | ||
25860c3b PG |
3211 | if (res) |
3212 | return res; /* "get" failed */ | |
b97bf3fd | 3213 | |
25860c3b PG |
3214 | if (len < sizeof(value)) |
3215 | return -EINVAL; | |
3216 | ||
3217 | if (copy_to_user(ov, &value, sizeof(value))) | |
3218 | return -EFAULT; | |
3219 | ||
3220 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
3221 | } |
3222 | ||
f2f9800d | 3223 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 3224 | { |
3e5cf362 JM |
3225 | struct net *net = sock_net(sock->sk); |
3226 | struct tipc_sioc_nodeid_req nr = {0}; | |
78acb1f9 EH |
3227 | struct tipc_sioc_ln_req lnr; |
3228 | void __user *argp = (void __user *)arg; | |
3229 | ||
3230 | switch (cmd) { | |
3231 | case SIOCGETLINKNAME: | |
3232 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
3233 | return -EFAULT; | |
3e5cf362 | 3234 | if (!tipc_node_get_linkname(net, |
f2f9800d | 3235 | lnr.bearer_id & 0xffff, lnr.peer, |
78acb1f9 EH |
3236 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
3237 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
3238 | return -EFAULT; | |
3239 | return 0; | |
3240 | } | |
3241 | return -EADDRNOTAVAIL; | |
3e5cf362 JM |
3242 | case SIOCGETNODEID: |
3243 | if (copy_from_user(&nr, argp, sizeof(nr))) | |
3244 | return -EFAULT; | |
3245 | if (!tipc_node_get_id(net, nr.peer, nr.node_id)) | |
3246 | return -EADDRNOTAVAIL; | |
3247 | if (copy_to_user(argp, &nr, sizeof(nr))) | |
3248 | return -EFAULT; | |
3249 | return 0; | |
78acb1f9 EH |
3250 | default: |
3251 | return -ENOIOCTLCMD; | |
3252 | } | |
3253 | } | |
3254 | ||
70b03759 EH |
3255 | static int tipc_socketpair(struct socket *sock1, struct socket *sock2) |
3256 | { | |
3257 | struct tipc_sock *tsk2 = tipc_sk(sock2->sk); | |
3258 | struct tipc_sock *tsk1 = tipc_sk(sock1->sk); | |
66bc1e8d EH |
3259 | u32 onode = tipc_own_addr(sock_net(sock1->sk)); |
3260 | ||
3261 | tsk1->peer.family = AF_TIPC; | |
3262 | tsk1->peer.addrtype = TIPC_ADDR_ID; | |
3263 | tsk1->peer.scope = TIPC_NODE_SCOPE; | |
3264 | tsk1->peer.addr.id.ref = tsk2->portid; | |
3265 | tsk1->peer.addr.id.node = onode; | |
3266 | tsk2->peer.family = AF_TIPC; | |
3267 | tsk2->peer.addrtype = TIPC_ADDR_ID; | |
3268 | tsk2->peer.scope = TIPC_NODE_SCOPE; | |
3269 | tsk2->peer.addr.id.ref = tsk1->portid; | |
3270 | tsk2->peer.addr.id.node = onode; | |
3271 | ||
3272 | tipc_sk_finish_conn(tsk1, tsk2->portid, onode); | |
3273 | tipc_sk_finish_conn(tsk2, tsk1->portid, onode); | |
70b03759 EH |
3274 | return 0; |
3275 | } | |
3276 | ||
ae86b9e3 BH |
3277 | /* Protocol switches for the various types of TIPC sockets */ |
3278 | ||
bca65eae | 3279 | static const struct proto_ops msg_ops = { |
0e65967e | 3280 | .owner = THIS_MODULE, |
b97bf3fd | 3281 | .family = AF_TIPC, |
247f0f3c YX |
3282 | .release = tipc_release, |
3283 | .bind = tipc_bind, | |
3284 | .connect = tipc_connect, | |
66bc1e8d | 3285 | .socketpair = tipc_socketpair, |
245f3d34 | 3286 | .accept = sock_no_accept, |
247f0f3c | 3287 | .getname = tipc_getname, |
a11e1d43 | 3288 | .poll = tipc_poll, |
78acb1f9 | 3289 | .ioctl = tipc_ioctl, |
245f3d34 | 3290 | .listen = sock_no_listen, |
247f0f3c YX |
3291 | .shutdown = tipc_shutdown, |
3292 | .setsockopt = tipc_setsockopt, | |
3293 | .getsockopt = tipc_getsockopt, | |
3294 | .sendmsg = tipc_sendmsg, | |
3295 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3296 | .mmap = sock_no_mmap, |
3297 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3298 | }; |
3299 | ||
bca65eae | 3300 | static const struct proto_ops packet_ops = { |
0e65967e | 3301 | .owner = THIS_MODULE, |
b97bf3fd | 3302 | .family = AF_TIPC, |
247f0f3c YX |
3303 | .release = tipc_release, |
3304 | .bind = tipc_bind, | |
3305 | .connect = tipc_connect, | |
70b03759 | 3306 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3307 | .accept = tipc_accept, |
3308 | .getname = tipc_getname, | |
a11e1d43 | 3309 | .poll = tipc_poll, |
78acb1f9 | 3310 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3311 | .listen = tipc_listen, |
3312 | .shutdown = tipc_shutdown, | |
3313 | .setsockopt = tipc_setsockopt, | |
3314 | .getsockopt = tipc_getsockopt, | |
3315 | .sendmsg = tipc_send_packet, | |
3316 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3317 | .mmap = sock_no_mmap, |
3318 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3319 | }; |
3320 | ||
bca65eae | 3321 | static const struct proto_ops stream_ops = { |
0e65967e | 3322 | .owner = THIS_MODULE, |
b97bf3fd | 3323 | .family = AF_TIPC, |
247f0f3c YX |
3324 | .release = tipc_release, |
3325 | .bind = tipc_bind, | |
3326 | .connect = tipc_connect, | |
70b03759 | 3327 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3328 | .accept = tipc_accept, |
3329 | .getname = tipc_getname, | |
a11e1d43 | 3330 | .poll = tipc_poll, |
78acb1f9 | 3331 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3332 | .listen = tipc_listen, |
3333 | .shutdown = tipc_shutdown, | |
3334 | .setsockopt = tipc_setsockopt, | |
3335 | .getsockopt = tipc_getsockopt, | |
365ad353 | 3336 | .sendmsg = tipc_sendstream, |
ec8a09fb | 3337 | .recvmsg = tipc_recvstream, |
8238745a YH |
3338 | .mmap = sock_no_mmap, |
3339 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3340 | }; |
3341 | ||
bca65eae | 3342 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 3343 | .owner = THIS_MODULE, |
b97bf3fd | 3344 | .family = AF_TIPC, |
c5fa7b3c | 3345 | .create = tipc_sk_create |
b97bf3fd PL |
3346 | }; |
3347 | ||
3348 | static struct proto tipc_proto = { | |
3349 | .name = "TIPC", | |
3350 | .owner = THIS_MODULE, | |
cc79dd1b YX |
3351 | .obj_size = sizeof(struct tipc_sock), |
3352 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
3353 | }; |
3354 | ||
3355 | /** | |
4323add6 | 3356 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 3357 | * |
b97bf3fd PL |
3358 | * Returns 0 on success, errno otherwise |
3359 | */ | |
4323add6 | 3360 | int tipc_socket_init(void) |
b97bf3fd PL |
3361 | { |
3362 | int res; | |
3363 | ||
c4307285 | 3364 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 3365 | if (res) { |
2cf8aa19 | 3366 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
3367 | goto out; |
3368 | } | |
3369 | ||
3370 | res = sock_register(&tipc_family_ops); | |
3371 | if (res) { | |
2cf8aa19 | 3372 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
3373 | proto_unregister(&tipc_proto); |
3374 | goto out; | |
3375 | } | |
b97bf3fd PL |
3376 | out: |
3377 | return res; | |
3378 | } | |
3379 | ||
3380 | /** | |
4323add6 | 3381 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 3382 | */ |
4323add6 | 3383 | void tipc_socket_stop(void) |
b97bf3fd | 3384 | { |
b97bf3fd PL |
3385 | sock_unregister(tipc_family_ops.family); |
3386 | proto_unregister(&tipc_proto); | |
3387 | } | |
34b78a12 RA |
3388 | |
3389 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 3390 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
3391 | { |
3392 | u32 peer_node; | |
3393 | u32 peer_port; | |
3394 | struct nlattr *nest; | |
3395 | ||
3396 | peer_node = tsk_peer_node(tsk); | |
3397 | peer_port = tsk_peer_port(tsk); | |
3398 | ||
ae0be8de | 3399 | nest = nla_nest_start_noflag(skb, TIPC_NLA_SOCK_CON); |
517ccc2a KL |
3400 | if (!nest) |
3401 | return -EMSGSIZE; | |
34b78a12 RA |
3402 | |
3403 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
3404 | goto msg_full; | |
3405 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
3406 | goto msg_full; | |
3407 | ||
3408 | if (tsk->conn_type != 0) { | |
3409 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
3410 | goto msg_full; | |
3411 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
3412 | goto msg_full; | |
3413 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
3414 | goto msg_full; | |
3415 | } | |
3416 | nla_nest_end(skb, nest); | |
3417 | ||
3418 | return 0; | |
3419 | ||
3420 | msg_full: | |
3421 | nla_nest_cancel(skb, nest); | |
3422 | ||
3423 | return -EMSGSIZE; | |
3424 | } | |
3425 | ||
dfde331e GM |
3426 | static int __tipc_nl_add_sk_info(struct sk_buff *skb, struct tipc_sock |
3427 | *tsk) | |
3428 | { | |
3429 | struct net *net = sock_net(skb->sk); | |
dfde331e GM |
3430 | struct sock *sk = &tsk->sk; |
3431 | ||
3432 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid) || | |
23fd3eac | 3433 | nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tipc_own_addr(net))) |
dfde331e GM |
3434 | return -EMSGSIZE; |
3435 | ||
3436 | if (tipc_sk_connected(sk)) { | |
3437 | if (__tipc_nl_add_sk_con(skb, tsk)) | |
3438 | return -EMSGSIZE; | |
3439 | } else if (!list_empty(&tsk->publications)) { | |
3440 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
3441 | return -EMSGSIZE; | |
3442 | } | |
3443 | return 0; | |
3444 | } | |
3445 | ||
34b78a12 | 3446 | /* Caller should hold socket lock for the passed tipc socket. */ |
d8182804 RA |
3447 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
3448 | struct tipc_sock *tsk) | |
34b78a12 | 3449 | { |
34b78a12 | 3450 | struct nlattr *attrs; |
dfde331e | 3451 | void *hdr; |
34b78a12 RA |
3452 | |
3453 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3454 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
3455 | if (!hdr) |
3456 | goto msg_cancel; | |
3457 | ||
ae0be8de | 3458 | attrs = nla_nest_start_noflag(skb, TIPC_NLA_SOCK); |
34b78a12 RA |
3459 | if (!attrs) |
3460 | goto genlmsg_cancel; | |
dfde331e GM |
3461 | |
3462 | if (__tipc_nl_add_sk_info(skb, tsk)) | |
34b78a12 RA |
3463 | goto attr_msg_cancel; |
3464 | ||
34b78a12 RA |
3465 | nla_nest_end(skb, attrs); |
3466 | genlmsg_end(skb, hdr); | |
3467 | ||
3468 | return 0; | |
3469 | ||
3470 | attr_msg_cancel: | |
3471 | nla_nest_cancel(skb, attrs); | |
3472 | genlmsg_cancel: | |
3473 | genlmsg_cancel(skb, hdr); | |
3474 | msg_cancel: | |
3475 | return -EMSGSIZE; | |
3476 | } | |
3477 | ||
c30b70de GM |
3478 | int tipc_nl_sk_walk(struct sk_buff *skb, struct netlink_callback *cb, |
3479 | int (*skb_handler)(struct sk_buff *skb, | |
3480 | struct netlink_callback *cb, | |
3481 | struct tipc_sock *tsk)) | |
34b78a12 | 3482 | { |
8f5c5fcf | 3483 | struct rhashtable_iter *iter = (void *)cb->args[4]; |
dfde331e GM |
3484 | struct tipc_sock *tsk; |
3485 | int err; | |
34b78a12 | 3486 | |
9a07efa9 CW |
3487 | rhashtable_walk_start(iter); |
3488 | while ((tsk = rhashtable_walk_next(iter)) != NULL) { | |
3489 | if (IS_ERR(tsk)) { | |
3490 | err = PTR_ERR(tsk); | |
3491 | if (err == -EAGAIN) { | |
3492 | err = 0; | |
d6e164e3 RA |
3493 | continue; |
3494 | } | |
9a07efa9 CW |
3495 | break; |
3496 | } | |
d6e164e3 | 3497 | |
9a07efa9 CW |
3498 | sock_hold(&tsk->sk); |
3499 | rhashtable_walk_stop(iter); | |
3500 | lock_sock(&tsk->sk); | |
3501 | err = skb_handler(skb, cb, tsk); | |
3502 | if (err) { | |
3503 | release_sock(&tsk->sk); | |
3504 | sock_put(&tsk->sk); | |
3505 | goto out; | |
07f6c4bc | 3506 | } |
9a07efa9 CW |
3507 | release_sock(&tsk->sk); |
3508 | rhashtable_walk_start(iter); | |
3509 | sock_put(&tsk->sk); | |
34b78a12 | 3510 | } |
9a07efa9 | 3511 | rhashtable_walk_stop(iter); |
d6e164e3 | 3512 | out: |
34b78a12 RA |
3513 | return skb->len; |
3514 | } | |
c30b70de GM |
3515 | EXPORT_SYMBOL(tipc_nl_sk_walk); |
3516 | ||
9a07efa9 CW |
3517 | int tipc_dump_start(struct netlink_callback *cb) |
3518 | { | |
8f5c5fcf CW |
3519 | return __tipc_dump_start(cb, sock_net(cb->skb->sk)); |
3520 | } | |
3521 | EXPORT_SYMBOL(tipc_dump_start); | |
3522 | ||
3523 | int __tipc_dump_start(struct netlink_callback *cb, struct net *net) | |
3524 | { | |
3525 | /* tipc_nl_name_table_dump() uses cb->args[0...3]. */ | |
3526 | struct rhashtable_iter *iter = (void *)cb->args[4]; | |
9a07efa9 CW |
3527 | struct tipc_net *tn = tipc_net(net); |
3528 | ||
3529 | if (!iter) { | |
3530 | iter = kmalloc(sizeof(*iter), GFP_KERNEL); | |
3531 | if (!iter) | |
3532 | return -ENOMEM; | |
3533 | ||
8f5c5fcf | 3534 | cb->args[4] = (long)iter; |
9a07efa9 CW |
3535 | } |
3536 | ||
3537 | rhashtable_walk_enter(&tn->sk_rht, iter); | |
3538 | return 0; | |
3539 | } | |
9a07efa9 CW |
3540 | |
3541 | int tipc_dump_done(struct netlink_callback *cb) | |
3542 | { | |
8f5c5fcf | 3543 | struct rhashtable_iter *hti = (void *)cb->args[4]; |
9a07efa9 CW |
3544 | |
3545 | rhashtable_walk_exit(hti); | |
3546 | kfree(hti); | |
3547 | return 0; | |
3548 | } | |
3549 | EXPORT_SYMBOL(tipc_dump_done); | |
3550 | ||
e41f0548 CW |
3551 | int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct netlink_callback *cb, |
3552 | struct tipc_sock *tsk, u32 sk_filter_state, | |
c30b70de GM |
3553 | u64 (*tipc_diag_gen_cookie)(struct sock *sk)) |
3554 | { | |
3555 | struct sock *sk = &tsk->sk; | |
3556 | struct nlattr *attrs; | |
3557 | struct nlattr *stat; | |
3558 | ||
3559 | /*filter response w.r.t sk_state*/ | |
3560 | if (!(sk_filter_state & (1 << sk->sk_state))) | |
3561 | return 0; | |
3562 | ||
ae0be8de | 3563 | attrs = nla_nest_start_noflag(skb, TIPC_NLA_SOCK); |
c30b70de GM |
3564 | if (!attrs) |
3565 | goto msg_cancel; | |
3566 | ||
3567 | if (__tipc_nl_add_sk_info(skb, tsk)) | |
3568 | goto attr_msg_cancel; | |
3569 | ||
3570 | if (nla_put_u32(skb, TIPC_NLA_SOCK_TYPE, (u32)sk->sk_type) || | |
3571 | nla_put_u32(skb, TIPC_NLA_SOCK_TIPC_STATE, (u32)sk->sk_state) || | |
3572 | nla_put_u32(skb, TIPC_NLA_SOCK_INO, sock_i_ino(sk)) || | |
3573 | nla_put_u32(skb, TIPC_NLA_SOCK_UID, | |
e41f0548 | 3574 | from_kuid_munged(sk_user_ns(NETLINK_CB(cb->skb).sk), |
4b2e6877 | 3575 | sock_i_uid(sk))) || |
c30b70de GM |
3576 | nla_put_u64_64bit(skb, TIPC_NLA_SOCK_COOKIE, |
3577 | tipc_diag_gen_cookie(sk), | |
3578 | TIPC_NLA_SOCK_PAD)) | |
3579 | goto attr_msg_cancel; | |
3580 | ||
ae0be8de | 3581 | stat = nla_nest_start_noflag(skb, TIPC_NLA_SOCK_STAT); |
c30b70de GM |
3582 | if (!stat) |
3583 | goto attr_msg_cancel; | |
3584 | ||
3585 | if (nla_put_u32(skb, TIPC_NLA_SOCK_STAT_RCVQ, | |
3586 | skb_queue_len(&sk->sk_receive_queue)) || | |
3587 | nla_put_u32(skb, TIPC_NLA_SOCK_STAT_SENDQ, | |
872619d8 GM |
3588 | skb_queue_len(&sk->sk_write_queue)) || |
3589 | nla_put_u32(skb, TIPC_NLA_SOCK_STAT_DROP, | |
3590 | atomic_read(&sk->sk_drops))) | |
c30b70de GM |
3591 | goto stat_msg_cancel; |
3592 | ||
3593 | if (tsk->cong_link_cnt && | |
3594 | nla_put_flag(skb, TIPC_NLA_SOCK_STAT_LINK_CONG)) | |
3595 | goto stat_msg_cancel; | |
3596 | ||
3597 | if (tsk_conn_cong(tsk) && | |
3598 | nla_put_flag(skb, TIPC_NLA_SOCK_STAT_CONN_CONG)) | |
3599 | goto stat_msg_cancel; | |
3600 | ||
3601 | nla_nest_end(skb, stat); | |
a1be5a20 GM |
3602 | |
3603 | if (tsk->group) | |
3604 | if (tipc_group_fill_sock_diag(tsk->group, skb)) | |
3605 | goto stat_msg_cancel; | |
3606 | ||
c30b70de GM |
3607 | nla_nest_end(skb, attrs); |
3608 | ||
3609 | return 0; | |
3610 | ||
3611 | stat_msg_cancel: | |
3612 | nla_nest_cancel(skb, stat); | |
3613 | attr_msg_cancel: | |
3614 | nla_nest_cancel(skb, attrs); | |
3615 | msg_cancel: | |
3616 | return -EMSGSIZE; | |
3617 | } | |
3618 | EXPORT_SYMBOL(tipc_sk_fill_sock_diag); | |
1a1a143d | 3619 | |
dfde331e GM |
3620 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) |
3621 | { | |
c30b70de | 3622 | return tipc_nl_sk_walk(skb, cb, __tipc_nl_add_sk); |
dfde331e GM |
3623 | } |
3624 | ||
1a1a143d | 3625 | /* Caller should hold socket lock for the passed tipc socket. */ |
d8182804 RA |
3626 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
3627 | struct netlink_callback *cb, | |
3628 | struct publication *publ) | |
1a1a143d RA |
3629 | { |
3630 | void *hdr; | |
3631 | struct nlattr *attrs; | |
3632 | ||
3633 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3634 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
3635 | if (!hdr) |
3636 | goto msg_cancel; | |
3637 | ||
ae0be8de | 3638 | attrs = nla_nest_start_noflag(skb, TIPC_NLA_PUBL); |
1a1a143d RA |
3639 | if (!attrs) |
3640 | goto genlmsg_cancel; | |
3641 | ||
3642 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
3643 | goto attr_msg_cancel; | |
3644 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
3645 | goto attr_msg_cancel; | |
3646 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
3647 | goto attr_msg_cancel; | |
3648 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
3649 | goto attr_msg_cancel; | |
3650 | ||
3651 | nla_nest_end(skb, attrs); | |
3652 | genlmsg_end(skb, hdr); | |
3653 | ||
3654 | return 0; | |
3655 | ||
3656 | attr_msg_cancel: | |
3657 | nla_nest_cancel(skb, attrs); | |
3658 | genlmsg_cancel: | |
3659 | genlmsg_cancel(skb, hdr); | |
3660 | msg_cancel: | |
3661 | return -EMSGSIZE; | |
3662 | } | |
3663 | ||
3664 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3665 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
3666 | struct netlink_callback *cb, | |
3667 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
3668 | { |
3669 | int err; | |
3670 | struct publication *p; | |
3671 | ||
3672 | if (*last_publ) { | |
e50e73e1 | 3673 | list_for_each_entry(p, &tsk->publications, binding_sock) { |
1a1a143d RA |
3674 | if (p->key == *last_publ) |
3675 | break; | |
3676 | } | |
3677 | if (p->key != *last_publ) { | |
3678 | /* We never set seq or call nl_dump_check_consistent() | |
3679 | * this means that setting prev_seq here will cause the | |
3680 | * consistence check to fail in the netlink callback | |
3681 | * handler. Resulting in the last NLMSG_DONE message | |
3682 | * having the NLM_F_DUMP_INTR flag set. | |
3683 | */ | |
3684 | cb->prev_seq = 1; | |
3685 | *last_publ = 0; | |
3686 | return -EPIPE; | |
3687 | } | |
3688 | } else { | |
3689 | p = list_first_entry(&tsk->publications, struct publication, | |
e50e73e1 | 3690 | binding_sock); |
1a1a143d RA |
3691 | } |
3692 | ||
e50e73e1 | 3693 | list_for_each_entry_from(p, &tsk->publications, binding_sock) { |
1a1a143d RA |
3694 | err = __tipc_nl_add_sk_publ(skb, cb, p); |
3695 | if (err) { | |
3696 | *last_publ = p->key; | |
3697 | return err; | |
3698 | } | |
3699 | } | |
3700 | *last_publ = 0; | |
3701 | ||
3702 | return 0; | |
3703 | } | |
3704 | ||
3705 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3706 | { | |
3707 | int err; | |
07f6c4bc | 3708 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
3709 | u32 last_publ = cb->args[1]; |
3710 | u32 done = cb->args[2]; | |
e05b31f4 | 3711 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
3712 | struct tipc_sock *tsk; |
3713 | ||
07f6c4bc | 3714 | if (!tsk_portid) { |
057af707 | 3715 | struct nlattr **attrs = genl_dumpit_info(cb)->attrs; |
1a1a143d RA |
3716 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; |
3717 | ||
45e093ae RA |
3718 | if (!attrs[TIPC_NLA_SOCK]) |
3719 | return -EINVAL; | |
3720 | ||
8cb08174 JB |
3721 | err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX, |
3722 | attrs[TIPC_NLA_SOCK], | |
3723 | tipc_nl_sock_policy, NULL); | |
1a1a143d RA |
3724 | if (err) |
3725 | return err; | |
3726 | ||
3727 | if (!sock[TIPC_NLA_SOCK_REF]) | |
3728 | return -EINVAL; | |
3729 | ||
07f6c4bc | 3730 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
3731 | } |
3732 | ||
3733 | if (done) | |
3734 | return 0; | |
3735 | ||
e05b31f4 | 3736 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
3737 | if (!tsk) |
3738 | return -EINVAL; | |
3739 | ||
3740 | lock_sock(&tsk->sk); | |
3741 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
3742 | if (!err) | |
3743 | done = 1; | |
3744 | release_sock(&tsk->sk); | |
07f6c4bc | 3745 | sock_put(&tsk->sk); |
1a1a143d | 3746 | |
07f6c4bc | 3747 | cb->args[0] = tsk_portid; |
1a1a143d RA |
3748 | cb->args[1] = last_publ; |
3749 | cb->args[2] = done; | |
3750 | ||
3751 | return skb->len; | |
3752 | } | |
b4b9771b | 3753 | |
01e661eb TL |
3754 | /** |
3755 | * tipc_sk_filtering - check if a socket should be traced | |
3756 | * @sk: the socket to be examined | |
3757 | * @sysctl_tipc_sk_filter[]: the socket tuple for filtering, | |
3758 | * (portid, sock type, name type, name lower, name upper) | |
3759 | * | |
3760 | * Returns true if the socket meets the socket tuple data | |
3761 | * (value 0 = 'any') or when there is no tuple set (all = 0), | |
3762 | * otherwise false | |
3763 | */ | |
3764 | bool tipc_sk_filtering(struct sock *sk) | |
3765 | { | |
3766 | struct tipc_sock *tsk; | |
3767 | struct publication *p; | |
3768 | u32 _port, _sktype, _type, _lower, _upper; | |
3769 | u32 type = 0, lower = 0, upper = 0; | |
3770 | ||
3771 | if (!sk) | |
3772 | return true; | |
3773 | ||
3774 | tsk = tipc_sk(sk); | |
3775 | ||
3776 | _port = sysctl_tipc_sk_filter[0]; | |
3777 | _sktype = sysctl_tipc_sk_filter[1]; | |
3778 | _type = sysctl_tipc_sk_filter[2]; | |
3779 | _lower = sysctl_tipc_sk_filter[3]; | |
3780 | _upper = sysctl_tipc_sk_filter[4]; | |
3781 | ||
3782 | if (!_port && !_sktype && !_type && !_lower && !_upper) | |
3783 | return true; | |
3784 | ||
3785 | if (_port) | |
3786 | return (_port == tsk->portid); | |
3787 | ||
3788 | if (_sktype && _sktype != sk->sk_type) | |
3789 | return false; | |
3790 | ||
3791 | if (tsk->published) { | |
3792 | p = list_first_entry_or_null(&tsk->publications, | |
3793 | struct publication, binding_sock); | |
3794 | if (p) { | |
3795 | type = p->type; | |
3796 | lower = p->lower; | |
3797 | upper = p->upper; | |
3798 | } | |
3799 | } | |
3800 | ||
3801 | if (!tipc_sk_type_connectionless(sk)) { | |
3802 | type = tsk->conn_type; | |
3803 | lower = tsk->conn_instance; | |
3804 | upper = tsk->conn_instance; | |
3805 | } | |
3806 | ||
3807 | if ((_type && _type != type) || (_lower && _lower != lower) || | |
3808 | (_upper && _upper != upper)) | |
3809 | return false; | |
3810 | ||
3811 | return true; | |
3812 | } | |
3813 | ||
b4b9771b TL |
3814 | u32 tipc_sock_get_portid(struct sock *sk) |
3815 | { | |
3816 | return (sk) ? (tipc_sk(sk))->portid : 0; | |
3817 | } | |
3818 | ||
01e661eb TL |
3819 | /** |
3820 | * tipc_sk_overlimit1 - check if socket rx queue is about to be overloaded, | |
3821 | * both the rcv and backlog queues are considered | |
3822 | * @sk: tipc sk to be checked | |
3823 | * @skb: tipc msg to be checked | |
3824 | * | |
3825 | * Returns true if the socket rx queue allocation is > 90%, otherwise false | |
3826 | */ | |
3827 | ||
3828 | bool tipc_sk_overlimit1(struct sock *sk, struct sk_buff *skb) | |
3829 | { | |
3830 | atomic_t *dcnt = &tipc_sk(sk)->dupl_rcvcnt; | |
3831 | unsigned int lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
3832 | unsigned int qsize = sk->sk_backlog.len + sk_rmem_alloc_get(sk); | |
3833 | ||
3834 | return (qsize > lim * 90 / 100); | |
3835 | } | |
3836 | ||
3837 | /** | |
3838 | * tipc_sk_overlimit2 - check if socket rx queue is about to be overloaded, | |
3839 | * only the rcv queue is considered | |
3840 | * @sk: tipc sk to be checked | |
3841 | * @skb: tipc msg to be checked | |
3842 | * | |
3843 | * Returns true if the socket rx queue allocation is > 90%, otherwise false | |
3844 | */ | |
3845 | ||
3846 | bool tipc_sk_overlimit2(struct sock *sk, struct sk_buff *skb) | |
3847 | { | |
3848 | unsigned int lim = rcvbuf_limit(sk, skb); | |
3849 | unsigned int qsize = sk_rmem_alloc_get(sk); | |
3850 | ||
3851 | return (qsize > lim * 90 / 100); | |
3852 | } | |
3853 | ||
b4b9771b TL |
3854 | /** |
3855 | * tipc_sk_dump - dump TIPC socket | |
3856 | * @sk: tipc sk to be dumped | |
3857 | * @dqueues: bitmask to decide if any socket queue to be dumped? | |
3858 | * - TIPC_DUMP_NONE: don't dump socket queues | |
3859 | * - TIPC_DUMP_SK_SNDQ: dump socket send queue | |
3860 | * - TIPC_DUMP_SK_RCVQ: dump socket rcv queue | |
3861 | * - TIPC_DUMP_SK_BKLGQ: dump socket backlog queue | |
3862 | * - TIPC_DUMP_ALL: dump all the socket queues above | |
3863 | * @buf: returned buffer of dump data in format | |
3864 | */ | |
3865 | int tipc_sk_dump(struct sock *sk, u16 dqueues, char *buf) | |
3866 | { | |
3867 | int i = 0; | |
3868 | size_t sz = (dqueues) ? SK_LMAX : SK_LMIN; | |
3869 | struct tipc_sock *tsk; | |
3870 | struct publication *p; | |
3871 | bool tsk_connected; | |
3872 | ||
3873 | if (!sk) { | |
3874 | i += scnprintf(buf, sz, "sk data: (null)\n"); | |
3875 | return i; | |
3876 | } | |
3877 | ||
3878 | tsk = tipc_sk(sk); | |
3879 | tsk_connected = !tipc_sk_type_connectionless(sk); | |
3880 | ||
3881 | i += scnprintf(buf, sz, "sk data: %u", sk->sk_type); | |
3882 | i += scnprintf(buf + i, sz - i, " %d", sk->sk_state); | |
3883 | i += scnprintf(buf + i, sz - i, " %x", tsk_own_node(tsk)); | |
3884 | i += scnprintf(buf + i, sz - i, " %u", tsk->portid); | |
3885 | i += scnprintf(buf + i, sz - i, " | %u", tsk_connected); | |
3886 | if (tsk_connected) { | |
3887 | i += scnprintf(buf + i, sz - i, " %x", tsk_peer_node(tsk)); | |
3888 | i += scnprintf(buf + i, sz - i, " %u", tsk_peer_port(tsk)); | |
3889 | i += scnprintf(buf + i, sz - i, " %u", tsk->conn_type); | |
3890 | i += scnprintf(buf + i, sz - i, " %u", tsk->conn_instance); | |
3891 | } | |
3892 | i += scnprintf(buf + i, sz - i, " | %u", tsk->published); | |
3893 | if (tsk->published) { | |
3894 | p = list_first_entry_or_null(&tsk->publications, | |
3895 | struct publication, binding_sock); | |
3896 | i += scnprintf(buf + i, sz - i, " %u", (p) ? p->type : 0); | |
3897 | i += scnprintf(buf + i, sz - i, " %u", (p) ? p->lower : 0); | |
3898 | i += scnprintf(buf + i, sz - i, " %u", (p) ? p->upper : 0); | |
3899 | } | |
3900 | i += scnprintf(buf + i, sz - i, " | %u", tsk->snd_win); | |
3901 | i += scnprintf(buf + i, sz - i, " %u", tsk->rcv_win); | |
3902 | i += scnprintf(buf + i, sz - i, " %u", tsk->max_pkt); | |
3903 | i += scnprintf(buf + i, sz - i, " %x", tsk->peer_caps); | |
3904 | i += scnprintf(buf + i, sz - i, " %u", tsk->cong_link_cnt); | |
3905 | i += scnprintf(buf + i, sz - i, " %u", tsk->snt_unacked); | |
3906 | i += scnprintf(buf + i, sz - i, " %u", tsk->rcv_unacked); | |
3907 | i += scnprintf(buf + i, sz - i, " %u", atomic_read(&tsk->dupl_rcvcnt)); | |
3908 | i += scnprintf(buf + i, sz - i, " %u", sk->sk_shutdown); | |
3909 | i += scnprintf(buf + i, sz - i, " | %d", sk_wmem_alloc_get(sk)); | |
3910 | i += scnprintf(buf + i, sz - i, " %d", sk->sk_sndbuf); | |
3911 | i += scnprintf(buf + i, sz - i, " | %d", sk_rmem_alloc_get(sk)); | |
3912 | i += scnprintf(buf + i, sz - i, " %d", sk->sk_rcvbuf); | |
70c26558 | 3913 | i += scnprintf(buf + i, sz - i, " | %d\n", READ_ONCE(sk->sk_backlog.len)); |
b4b9771b TL |
3914 | |
3915 | if (dqueues & TIPC_DUMP_SK_SNDQ) { | |
3916 | i += scnprintf(buf + i, sz - i, "sk_write_queue: "); | |
3917 | i += tipc_list_dump(&sk->sk_write_queue, false, buf + i); | |
3918 | } | |
3919 | ||
3920 | if (dqueues & TIPC_DUMP_SK_RCVQ) { | |
3921 | i += scnprintf(buf + i, sz - i, "sk_receive_queue: "); | |
3922 | i += tipc_list_dump(&sk->sk_receive_queue, false, buf + i); | |
3923 | } | |
3924 | ||
3925 | if (dqueues & TIPC_DUMP_SK_BKLGQ) { | |
3926 | i += scnprintf(buf + i, sz - i, "sk_backlog:\n head "); | |
3927 | i += tipc_skb_dump(sk->sk_backlog.head, false, buf + i); | |
3928 | if (sk->sk_backlog.tail != sk->sk_backlog.head) { | |
3929 | i += scnprintf(buf + i, sz - i, " tail "); | |
3930 | i += tipc_skb_dump(sk->sk_backlog.tail, false, | |
3931 | buf + i); | |
3932 | } | |
3933 | } | |
3934 | ||
3935 | return i; | |
3936 | } |