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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
75da2163 | 4 | * Copyright (c) 2001-2007, 2012-2017, Ericsson AB |
c5fa7b3c | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
07f6c4bc | 37 | #include <linux/rhashtable.h> |
174cd4b1 IM |
38 | #include <linux/sched/signal.h> |
39 | ||
b97bf3fd | 40 | #include "core.h" |
e2dafe87 | 41 | #include "name_table.h" |
78acb1f9 | 42 | #include "node.h" |
e2dafe87 | 43 | #include "link.h" |
c637c103 | 44 | #include "name_distr.h" |
2e84c60b | 45 | #include "socket.h" |
a6bf70f7 | 46 | #include "bcast.h" |
49cc66ea | 47 | #include "netlink.h" |
75da2163 | 48 | #include "group.h" |
2cf8aa19 | 49 | |
07f6c4bc | 50 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
0d5fcebf | 51 | #define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc | 52 | #define TIPC_FWD_MSG 1 |
07f6c4bc YX |
53 | #define TIPC_MAX_PORT 0xffffffff |
54 | #define TIPC_MIN_PORT 1 | |
e9f8b101 | 55 | #define TIPC_ACK_RATE 4 /* ACK at 1/4 of of rcv window size */ |
301bae56 | 56 | |
0c288c86 PB |
57 | enum { |
58 | TIPC_LISTEN = TCP_LISTEN, | |
8ea642ee | 59 | TIPC_ESTABLISHED = TCP_ESTABLISHED, |
438adcaf | 60 | TIPC_OPEN = TCP_CLOSE, |
9fd4b070 | 61 | TIPC_DISCONNECTING = TCP_CLOSE_WAIT, |
99a20889 | 62 | TIPC_CONNECTING = TCP_SYN_SENT, |
0c288c86 PB |
63 | }; |
64 | ||
31c82a2d JM |
65 | struct sockaddr_pair { |
66 | struct sockaddr_tipc sock; | |
67 | struct sockaddr_tipc member; | |
68 | }; | |
69 | ||
301bae56 JPM |
70 | /** |
71 | * struct tipc_sock - TIPC socket structure | |
72 | * @sk: socket - interacts with 'port' and with user via the socket API | |
301bae56 JPM |
73 | * @conn_type: TIPC type used when connection was established |
74 | * @conn_instance: TIPC instance used when connection was established | |
75 | * @published: non-zero if port has one or more associated names | |
76 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 77 | * @portid: unique port identity in TIPC socket hash table |
301bae56 | 78 | * @phdr: preformatted message header used when sending messages |
365ad353 | 79 | * #cong_links: list of congested links |
301bae56 | 80 | * @publications: list of publications for port |
365ad353 | 81 | * @blocking_link: address of the congested link we are currently sleeping on |
301bae56 JPM |
82 | * @pub_count: total # of publications port has made during its lifetime |
83 | * @probing_state: | |
301bae56 JPM |
84 | * @conn_timeout: the time we can wait for an unresponded setup request |
85 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
365ad353 | 86 | * @cong_link_cnt: number of congested links |
75da2163 | 87 | * @snt_unacked: # messages sent by socket, and not yet acked by peer |
301bae56 | 88 | * @rcv_unacked: # messages read by user, but not yet acked back to peer |
aeda16b6 | 89 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc | 90 | * @node: hash table node |
01fd12bb | 91 | * @mc_method: cookie for use between socket and broadcast layer |
07f6c4bc | 92 | * @rcu: rcu struct for tipc_sock |
301bae56 JPM |
93 | */ |
94 | struct tipc_sock { | |
95 | struct sock sk; | |
301bae56 JPM |
96 | u32 conn_type; |
97 | u32 conn_instance; | |
98 | int published; | |
99 | u32 max_pkt; | |
07f6c4bc | 100 | u32 portid; |
301bae56 | 101 | struct tipc_msg phdr; |
365ad353 | 102 | struct list_head cong_links; |
301bae56 JPM |
103 | struct list_head publications; |
104 | u32 pub_count; | |
301bae56 JPM |
105 | uint conn_timeout; |
106 | atomic_t dupl_rcvcnt; | |
8ea642ee | 107 | bool probe_unacked; |
365ad353 | 108 | u16 cong_link_cnt; |
10724cc7 JPM |
109 | u16 snt_unacked; |
110 | u16 snd_win; | |
60020e18 | 111 | u16 peer_caps; |
10724cc7 JPM |
112 | u16 rcv_unacked; |
113 | u16 rcv_win; | |
aeda16b6 | 114 | struct sockaddr_tipc peer; |
07f6c4bc | 115 | struct rhash_head node; |
01fd12bb | 116 | struct tipc_mc_method mc_method; |
07f6c4bc | 117 | struct rcu_head rcu; |
75da2163 | 118 | struct tipc_group *group; |
301bae56 | 119 | }; |
b97bf3fd | 120 | |
64ac5f59 | 121 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 122 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 123 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 124 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c | 125 | static int tipc_release(struct socket *sock); |
cdfbabfb DH |
126 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
127 | bool kern); | |
31b102bb | 128 | static void tipc_sk_timeout(struct timer_list *t); |
301bae56 | 129 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 130 | struct tipc_name_seq const *seq); |
301bae56 | 131 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 132 | struct tipc_name_seq const *seq); |
75da2163 | 133 | static int tipc_sk_leave(struct tipc_sock *tsk); |
e05b31f4 | 134 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
135 | static int tipc_sk_insert(struct tipc_sock *tsk); |
136 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
365ad353 | 137 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz); |
39a0295f | 138 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); |
b97bf3fd | 139 | |
bca65eae FW |
140 | static const struct proto_ops packet_ops; |
141 | static const struct proto_ops stream_ops; | |
142 | static const struct proto_ops msg_ops; | |
b97bf3fd | 143 | static struct proto tipc_proto; |
6cca7289 HX |
144 | static const struct rhashtable_params tsk_rht_params; |
145 | ||
c5898636 JPM |
146 | static u32 tsk_own_node(struct tipc_sock *tsk) |
147 | { | |
148 | return msg_prevnode(&tsk->phdr); | |
149 | } | |
150 | ||
301bae56 | 151 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 152 | { |
301bae56 | 153 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
154 | } |
155 | ||
301bae56 | 156 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 157 | { |
301bae56 | 158 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
159 | } |
160 | ||
301bae56 | 161 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 162 | { |
301bae56 | 163 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
164 | } |
165 | ||
301bae56 | 166 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 167 | { |
301bae56 | 168 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
169 | } |
170 | ||
301bae56 | 171 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 172 | { |
301bae56 | 173 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
174 | } |
175 | ||
301bae56 | 176 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 177 | { |
301bae56 | 178 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
179 | } |
180 | ||
301bae56 | 181 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 182 | { |
301bae56 | 183 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
184 | } |
185 | ||
301bae56 | 186 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
187 | { |
188 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
189 | return -EINVAL; | |
301bae56 | 190 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
191 | return 0; |
192 | } | |
8826cde6 | 193 | |
301bae56 JPM |
194 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
195 | { | |
196 | return container_of(sk, struct tipc_sock, sk); | |
197 | } | |
198 | ||
10724cc7 | 199 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 200 | { |
6998cc6e | 201 | return tsk->snt_unacked > tsk->snd_win; |
10724cc7 JPM |
202 | } |
203 | ||
b7d42635 JM |
204 | static u16 tsk_blocks(int len) |
205 | { | |
206 | return ((len / FLOWCTL_BLK_SZ) + 1); | |
207 | } | |
208 | ||
10724cc7 JPM |
209 | /* tsk_blocks(): translate a buffer size in bytes to number of |
210 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
211 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
212 | */ | |
213 | static u16 tsk_adv_blocks(int len) | |
214 | { | |
215 | return len / FLOWCTL_BLK_SZ / 4; | |
216 | } | |
217 | ||
218 | /* tsk_inc(): increment counter for sent or received data | |
219 | * - If block based flow control is not supported by peer we | |
220 | * fall back to message based ditto, incrementing the counter | |
221 | */ | |
222 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
223 | { | |
224 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
225 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
226 | return 1; | |
301bae56 JPM |
227 | } |
228 | ||
0c3141e9 | 229 | /** |
2e84c60b | 230 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
231 | * |
232 | * Caller must hold socket lock | |
b97bf3fd | 233 | */ |
2e84c60b | 234 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 235 | { |
5f6d9123 | 236 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
237 | } |
238 | ||
bcd3ffd4 JPM |
239 | /* tipc_sk_respond() : send response message back to sender |
240 | */ | |
241 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
242 | { | |
243 | u32 selector; | |
244 | u32 dnode; | |
245 | u32 onode = tipc_own_addr(sock_net(sk)); | |
246 | ||
247 | if (!tipc_msg_reverse(onode, &skb, err)) | |
248 | return; | |
249 | ||
250 | dnode = msg_destnode(buf_msg(skb)); | |
251 | selector = msg_origport(buf_msg(skb)); | |
252 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
253 | } | |
254 | ||
b97bf3fd | 255 | /** |
2e84c60b | 256 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
257 | * |
258 | * Caller must hold socket lock | |
b97bf3fd | 259 | */ |
2e84c60b | 260 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 261 | { |
a6ca1094 | 262 | struct sk_buff *skb; |
0c3141e9 | 263 | |
bcd3ffd4 JPM |
264 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
265 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
266 | } |
267 | ||
d6fb7e9c PB |
268 | static bool tipc_sk_connected(struct sock *sk) |
269 | { | |
f40acbaf | 270 | return sk->sk_state == TIPC_ESTABLISHED; |
d6fb7e9c PB |
271 | } |
272 | ||
c752023a PB |
273 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
274 | * @sk: socket | |
275 | * | |
276 | * Returns true if connection less, false otherwise | |
277 | */ | |
278 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
279 | { | |
280 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
281 | } | |
282 | ||
2e84c60b | 283 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
284 | * |
285 | * Handles cases where the node's network address has changed from | |
286 | * the default of <0.0.0> to its configured setting. | |
287 | */ | |
2e84c60b | 288 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 289 | { |
d6fb7e9c PB |
290 | struct sock *sk = &tsk->sk; |
291 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); | |
301bae56 | 292 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
293 | u32 orig_node; |
294 | u32 peer_node; | |
295 | ||
d6fb7e9c | 296 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
297 | return false; |
298 | ||
299 | if (unlikely(msg_origport(msg) != peer_port)) | |
300 | return false; | |
301 | ||
302 | orig_node = msg_orignode(msg); | |
301bae56 | 303 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
304 | |
305 | if (likely(orig_node == peer_node)) | |
306 | return true; | |
307 | ||
34747539 | 308 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
309 | return true; |
310 | ||
34747539 | 311 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
312 | return true; |
313 | ||
314 | return false; | |
315 | } | |
316 | ||
0c288c86 PB |
317 | /* tipc_set_sk_state - set the sk_state of the socket |
318 | * @sk: socket | |
319 | * | |
320 | * Caller must hold socket lock | |
321 | * | |
322 | * Returns 0 on success, errno otherwise | |
323 | */ | |
324 | static int tipc_set_sk_state(struct sock *sk, int state) | |
325 | { | |
438adcaf | 326 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
327 | int res = -EINVAL; |
328 | ||
329 | switch (state) { | |
438adcaf PB |
330 | case TIPC_OPEN: |
331 | res = 0; | |
332 | break; | |
0c288c86 | 333 | case TIPC_LISTEN: |
99a20889 | 334 | case TIPC_CONNECTING: |
438adcaf | 335 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
336 | res = 0; |
337 | break; | |
8ea642ee | 338 | case TIPC_ESTABLISHED: |
99a20889 | 339 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 340 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
341 | res = 0; |
342 | break; | |
9fd4b070 | 343 | case TIPC_DISCONNECTING: |
99a20889 | 344 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
345 | oldsk_state == TIPC_ESTABLISHED) |
346 | res = 0; | |
347 | break; | |
0c288c86 PB |
348 | } |
349 | ||
350 | if (!res) | |
351 | sk->sk_state = state; | |
352 | ||
353 | return res; | |
354 | } | |
355 | ||
8c44e1af JPM |
356 | static int tipc_sk_sock_err(struct socket *sock, long *timeout) |
357 | { | |
358 | struct sock *sk = sock->sk; | |
359 | int err = sock_error(sk); | |
360 | int typ = sock->type; | |
361 | ||
362 | if (err) | |
363 | return err; | |
364 | if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { | |
365 | if (sk->sk_state == TIPC_DISCONNECTING) | |
366 | return -EPIPE; | |
367 | else if (!tipc_sk_connected(sk)) | |
368 | return -ENOTCONN; | |
369 | } | |
370 | if (!*timeout) | |
371 | return -EAGAIN; | |
372 | if (signal_pending(current)) | |
373 | return sock_intr_errno(*timeout); | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
844cf763 JPM |
378 | #define tipc_wait_for_cond(sock_, timeo_, condition_) \ |
379 | ({ \ | |
380 | struct sock *sk_; \ | |
381 | int rc_; \ | |
382 | \ | |
383 | while ((rc_ = !(condition_))) { \ | |
384 | DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ | |
385 | sk_ = (sock_)->sk; \ | |
386 | rc_ = tipc_sk_sock_err((sock_), timeo_); \ | |
387 | if (rc_) \ | |
388 | break; \ | |
389 | prepare_to_wait(sk_sleep(sk_), &wait_, TASK_INTERRUPTIBLE); \ | |
390 | release_sock(sk_); \ | |
391 | *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \ | |
392 | sched_annotate_sleep(); \ | |
393 | lock_sock(sk_); \ | |
394 | remove_wait_queue(sk_sleep(sk_), &wait_); \ | |
395 | } \ | |
396 | rc_; \ | |
8c44e1af JPM |
397 | }) |
398 | ||
b97bf3fd | 399 | /** |
c5fa7b3c | 400 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 401 | * @net: network namespace (must be default network) |
b97bf3fd PL |
402 | * @sock: pre-allocated socket structure |
403 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 404 | * @kern: caused by kernel or by userspace? |
c4307285 | 405 | * |
0c3141e9 AS |
406 | * This routine creates additional data structures used by the TIPC socket, |
407 | * initializes them, and links them together. | |
b97bf3fd PL |
408 | * |
409 | * Returns 0 on success, errno otherwise | |
410 | */ | |
58ed9442 JPM |
411 | static int tipc_sk_create(struct net *net, struct socket *sock, |
412 | int protocol, int kern) | |
b97bf3fd | 413 | { |
c5898636 | 414 | struct tipc_net *tn; |
0c3141e9 | 415 | const struct proto_ops *ops; |
b97bf3fd | 416 | struct sock *sk; |
58ed9442 | 417 | struct tipc_sock *tsk; |
5b8fa7ce | 418 | struct tipc_msg *msg; |
0c3141e9 AS |
419 | |
420 | /* Validate arguments */ | |
b97bf3fd PL |
421 | if (unlikely(protocol != 0)) |
422 | return -EPROTONOSUPPORT; | |
423 | ||
b97bf3fd PL |
424 | switch (sock->type) { |
425 | case SOCK_STREAM: | |
0c3141e9 | 426 | ops = &stream_ops; |
b97bf3fd PL |
427 | break; |
428 | case SOCK_SEQPACKET: | |
0c3141e9 | 429 | ops = &packet_ops; |
b97bf3fd PL |
430 | break; |
431 | case SOCK_DGRAM: | |
b97bf3fd | 432 | case SOCK_RDM: |
0c3141e9 | 433 | ops = &msg_ops; |
b97bf3fd | 434 | break; |
49978651 | 435 | default: |
49978651 | 436 | return -EPROTOTYPE; |
b97bf3fd PL |
437 | } |
438 | ||
0c3141e9 | 439 | /* Allocate socket's protocol area */ |
11aa9c28 | 440 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 441 | if (sk == NULL) |
b97bf3fd | 442 | return -ENOMEM; |
b97bf3fd | 443 | |
58ed9442 | 444 | tsk = tipc_sk(sk); |
301bae56 | 445 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 | 446 | INIT_LIST_HEAD(&tsk->publications); |
365ad353 | 447 | INIT_LIST_HEAD(&tsk->cong_links); |
301bae56 | 448 | msg = &tsk->phdr; |
c5898636 | 449 | tn = net_generic(sock_net(sk), tipc_net_id); |
b97bf3fd | 450 | |
0c3141e9 | 451 | /* Finish initializing socket data structures */ |
0c3141e9 | 452 | sock->ops = ops; |
0c3141e9 | 453 | sock_init_data(sock, sk); |
438adcaf | 454 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 455 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 456 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
457 | return -EINVAL; |
458 | } | |
40f9f439 HX |
459 | |
460 | /* Ensure tsk is visible before we read own_addr. */ | |
461 | smp_mb(); | |
462 | ||
463 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
464 | NAMED_H_SIZE, 0); | |
465 | ||
07f6c4bc | 466 | msg_set_origport(msg, tsk->portid); |
31b102bb | 467 | timer_setup(&sk->sk_timer, tipc_sk_timeout, 0); |
6f00089c | 468 | sk->sk_shutdown = 0; |
64ac5f59 | 469 | sk->sk_backlog_rcv = tipc_sk_backlog_rcv; |
cc79dd1b | 470 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
471 | sk->sk_data_ready = tipc_data_ready; |
472 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 473 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc JPM |
474 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
475 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
7ef43eba | 476 | |
10724cc7 JPM |
477 | /* Start out with safe limits until we receive an advertised window */ |
478 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
479 | tsk->rcv_win = tsk->snd_win; | |
480 | ||
c752023a | 481 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 482 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 483 | if (sock->type == SOCK_DGRAM) |
301bae56 | 484 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 485 | } |
438adcaf | 486 | |
b97bf3fd PL |
487 | return 0; |
488 | } | |
489 | ||
07f6c4bc YX |
490 | static void tipc_sk_callback(struct rcu_head *head) |
491 | { | |
492 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
493 | ||
494 | sock_put(&tsk->sk); | |
495 | } | |
496 | ||
6f00089c PB |
497 | /* Caller should hold socket lock for the socket. */ |
498 | static void __tipc_shutdown(struct socket *sock, int error) | |
499 | { | |
500 | struct sock *sk = sock->sk; | |
501 | struct tipc_sock *tsk = tipc_sk(sk); | |
502 | struct net *net = sock_net(sk); | |
365ad353 | 503 | long timeout = CONN_TIMEOUT_DEFAULT; |
6f00089c PB |
504 | u32 dnode = tsk_peer_node(tsk); |
505 | struct sk_buff *skb; | |
506 | ||
365ad353 JPM |
507 | /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */ |
508 | tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && | |
509 | !tsk_conn_cong(tsk))); | |
510 | ||
6f00089c PB |
511 | /* Reject all unreceived messages, except on an active connection |
512 | * (which disconnects locally & sends a 'FIN+' to peer). | |
513 | */ | |
514 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
515 | if (TIPC_SKB_CB(skb)->bytes_read) { | |
516 | kfree_skb(skb); | |
693c5649 | 517 | continue; |
6f00089c | 518 | } |
693c5649 JPM |
519 | if (!tipc_sk_type_connectionless(sk) && |
520 | sk->sk_state != TIPC_DISCONNECTING) { | |
521 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
522 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
523 | } | |
524 | tipc_sk_respond(sk, skb, error); | |
6f00089c | 525 | } |
693c5649 JPM |
526 | |
527 | if (tipc_sk_type_connectionless(sk)) | |
528 | return; | |
529 | ||
6f00089c PB |
530 | if (sk->sk_state != TIPC_DISCONNECTING) { |
531 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
532 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
533 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
534 | tsk->portid, error); | |
535 | if (skb) | |
536 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
693c5649 JPM |
537 | tipc_node_remove_conn(net, dnode, tsk->portid); |
538 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
6f00089c PB |
539 | } |
540 | } | |
541 | ||
b97bf3fd | 542 | /** |
247f0f3c | 543 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
544 | * @sock: socket to destroy |
545 | * | |
546 | * This routine cleans up any messages that are still queued on the socket. | |
547 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
548 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
549 | * and any others are discarded. (If the first message on a STREAM socket | |
550 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 551 | * |
b97bf3fd PL |
552 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
553 | * are returned or discarded according to the "destination droppable" setting | |
554 | * specified for the message by the sender. | |
555 | * | |
556 | * Returns 0 on success, errno otherwise | |
557 | */ | |
247f0f3c | 558 | static int tipc_release(struct socket *sock) |
b97bf3fd | 559 | { |
b97bf3fd | 560 | struct sock *sk = sock->sk; |
58ed9442 | 561 | struct tipc_sock *tsk; |
b97bf3fd | 562 | |
0c3141e9 AS |
563 | /* |
564 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
565 | * releases a pre-allocated child socket that was never used) | |
566 | */ | |
0c3141e9 | 567 | if (sk == NULL) |
b97bf3fd | 568 | return 0; |
c4307285 | 569 | |
58ed9442 | 570 | tsk = tipc_sk(sk); |
0c3141e9 AS |
571 | lock_sock(sk); |
572 | ||
6f00089c PB |
573 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
574 | sk->sk_shutdown = SHUTDOWN_MASK; | |
75da2163 | 575 | tipc_sk_leave(tsk); |
301bae56 | 576 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 577 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 578 | tipc_sk_remove(tsk); |
b97bf3fd | 579 | |
0c3141e9 | 580 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 581 | release_sock(sk); |
a80ae530 | 582 | tipc_dest_list_purge(&tsk->cong_links); |
365ad353 | 583 | tsk->cong_link_cnt = 0; |
07f6c4bc | 584 | call_rcu(&tsk->rcu, tipc_sk_callback); |
0c3141e9 | 585 | sock->sk = NULL; |
b97bf3fd | 586 | |
065d7e39 | 587 | return 0; |
b97bf3fd PL |
588 | } |
589 | ||
590 | /** | |
247f0f3c | 591 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
592 | * @sock: socket structure |
593 | * @uaddr: socket address describing name(s) and desired operation | |
594 | * @uaddr_len: size of socket address data structure | |
c4307285 | 595 | * |
b97bf3fd PL |
596 | * Name and name sequence binding is indicated using a positive scope value; |
597 | * a negative scope value unbinds the specified name. Specifying no name | |
598 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 599 | * |
b97bf3fd | 600 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
601 | * |
602 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
603 | * access any non-constant socket information. | |
b97bf3fd | 604 | */ |
247f0f3c YX |
605 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
606 | int uaddr_len) | |
b97bf3fd | 607 | { |
84602761 | 608 | struct sock *sk = sock->sk; |
b97bf3fd | 609 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 610 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 611 | int res = -EINVAL; |
b97bf3fd | 612 | |
84602761 YX |
613 | lock_sock(sk); |
614 | if (unlikely(!uaddr_len)) { | |
301bae56 | 615 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
616 | goto exit; |
617 | } | |
75da2163 JM |
618 | if (tsk->group) { |
619 | res = -EACCES; | |
620 | goto exit; | |
621 | } | |
84602761 YX |
622 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
623 | res = -EINVAL; | |
624 | goto exit; | |
625 | } | |
626 | if (addr->family != AF_TIPC) { | |
627 | res = -EAFNOSUPPORT; | |
628 | goto exit; | |
629 | } | |
b97bf3fd | 630 | |
b97bf3fd PL |
631 | if (addr->addrtype == TIPC_ADDR_NAME) |
632 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
633 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
634 | res = -EAFNOSUPPORT; | |
635 | goto exit; | |
636 | } | |
c4307285 | 637 | |
13a2e898 | 638 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 639 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
640 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
641 | res = -EACCES; | |
642 | goto exit; | |
643 | } | |
c422f1bd | 644 | |
84602761 | 645 | res = (addr->scope > 0) ? |
301bae56 JPM |
646 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
647 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
648 | exit: |
649 | release_sock(sk); | |
650 | return res; | |
b97bf3fd PL |
651 | } |
652 | ||
c4307285 | 653 | /** |
247f0f3c | 654 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
655 | * @sock: socket structure |
656 | * @uaddr: area for returned socket address | |
657 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 658 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 659 | * |
b97bf3fd | 660 | * Returns 0 on success, errno otherwise |
0c3141e9 | 661 | * |
2da59918 AS |
662 | * NOTE: This routine doesn't need to take the socket lock since it only |
663 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 664 | * a completely predictable manner). |
b97bf3fd | 665 | */ |
247f0f3c YX |
666 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
667 | int *uaddr_len, int peer) | |
b97bf3fd | 668 | { |
b97bf3fd | 669 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
670 | struct sock *sk = sock->sk; |
671 | struct tipc_sock *tsk = tipc_sk(sk); | |
34747539 | 672 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 673 | |
88f8a5e3 | 674 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 675 | if (peer) { |
f40acbaf | 676 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 677 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 678 | return -ENOTCONN; |
301bae56 JPM |
679 | addr->addr.id.ref = tsk_peer_port(tsk); |
680 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 681 | } else { |
07f6c4bc | 682 | addr->addr.id.ref = tsk->portid; |
34747539 | 683 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 684 | } |
b97bf3fd PL |
685 | |
686 | *uaddr_len = sizeof(*addr); | |
687 | addr->addrtype = TIPC_ADDR_ID; | |
688 | addr->family = AF_TIPC; | |
689 | addr->scope = 0; | |
b97bf3fd PL |
690 | addr->addr.name.domain = 0; |
691 | ||
0c3141e9 | 692 | return 0; |
b97bf3fd PL |
693 | } |
694 | ||
695 | /** | |
247f0f3c | 696 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
697 | * @file: file structure associated with the socket |
698 | * @sock: socket for which to calculate the poll bits | |
699 | * @wait: ??? | |
700 | * | |
9b674e82 AS |
701 | * Returns pollmask value |
702 | * | |
703 | * COMMENTARY: | |
704 | * It appears that the usual socket locking mechanisms are not useful here | |
705 | * since the pollmask info is potentially out-of-date the moment this routine | |
706 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
707 | * to handle any preventable race conditions, so TIPC will do the same ... | |
708 | * | |
f662c070 AS |
709 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
710 | * imply that the operation will succeed, merely that it should be performed | |
711 | * and will not block. | |
b97bf3fd | 712 | */ |
ade994f4 | 713 | static __poll_t tipc_poll(struct file *file, struct socket *sock, |
247f0f3c | 714 | poll_table *wait) |
b97bf3fd | 715 | { |
9b674e82 | 716 | struct sock *sk = sock->sk; |
58ed9442 | 717 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 718 | struct tipc_group *grp = tsk->group; |
ade994f4 | 719 | __poll_t revents = 0; |
9b674e82 | 720 | |
f288bef4 | 721 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 722 | |
6f00089c | 723 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
ae236fb2 | 724 | revents |= POLLRDHUP | POLLIN | POLLRDNORM; |
6f00089c | 725 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
ae236fb2 | 726 | revents |= POLLHUP; |
6f00089c | 727 | |
f40acbaf PB |
728 | switch (sk->sk_state) { |
729 | case TIPC_ESTABLISHED: | |
517d7c79 | 730 | case TIPC_CONNECTING: |
365ad353 | 731 | if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk)) |
ae236fb2 | 732 | revents |= POLLOUT; |
f40acbaf PB |
733 | /* fall thru' */ |
734 | case TIPC_LISTEN: | |
cb4dc41e | 735 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
ae236fb2 | 736 | revents |= POLLIN | POLLRDNORM; |
f40acbaf PB |
737 | break; |
738 | case TIPC_OPEN: | |
75da2163 JM |
739 | if (!grp || tipc_group_size(grp)) |
740 | if (!tsk->cong_link_cnt) | |
ae236fb2 JM |
741 | revents |= POLLOUT; |
742 | if (!tipc_sk_type_connectionless(sk)) | |
743 | break; | |
cb4dc41e | 744 | if (skb_queue_empty(&sk->sk_receive_queue)) |
ae236fb2 JM |
745 | break; |
746 | revents |= POLLIN | POLLRDNORM; | |
f40acbaf PB |
747 | break; |
748 | case TIPC_DISCONNECTING: | |
ae236fb2 | 749 | revents = POLLIN | POLLRDNORM | POLLHUP; |
f40acbaf | 750 | break; |
f662c070 | 751 | } |
ae236fb2 | 752 | return revents; |
b97bf3fd PL |
753 | } |
754 | ||
0abd8ff2 JPM |
755 | /** |
756 | * tipc_sendmcast - send multicast message | |
757 | * @sock: socket structure | |
758 | * @seq: destination address | |
562640f3 | 759 | * @msg: message to send |
365ad353 JPM |
760 | * @dlen: length of data to send |
761 | * @timeout: timeout to wait for wakeup | |
0abd8ff2 JPM |
762 | * |
763 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
764 | * Returns the number of bytes sent on success, or errno | |
765 | */ | |
766 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
365ad353 | 767 | struct msghdr *msg, size_t dlen, long timeout) |
0abd8ff2 JPM |
768 | { |
769 | struct sock *sk = sock->sk; | |
c5898636 | 770 | struct tipc_sock *tsk = tipc_sk(sk); |
365ad353 | 771 | struct tipc_msg *hdr = &tsk->phdr; |
f2f9800d | 772 | struct net *net = sock_net(sk); |
365ad353 | 773 | int mtu = tipc_bcast_get_mtu(net); |
01fd12bb | 774 | struct tipc_mc_method *method = &tsk->mc_method; |
a853e4c6 | 775 | u32 domain = addr_domain(net, TIPC_CLUSTER_SCOPE); |
365ad353 | 776 | struct sk_buff_head pkts; |
a853e4c6 | 777 | struct tipc_nlist dsts; |
0abd8ff2 JPM |
778 | int rc; |
779 | ||
75da2163 JM |
780 | if (tsk->group) |
781 | return -EACCES; | |
782 | ||
a853e4c6 | 783 | /* Block or return if any destination link is congested */ |
365ad353 JPM |
784 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); |
785 | if (unlikely(rc)) | |
786 | return rc; | |
f214fc40 | 787 | |
a853e4c6 JPM |
788 | /* Lookup destination nodes */ |
789 | tipc_nlist_init(&dsts, tipc_own_addr(net)); | |
790 | tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower, | |
791 | seq->upper, domain, &dsts); | |
792 | if (!dsts.local && !dsts.remote) | |
793 | return -EHOSTUNREACH; | |
794 | ||
795 | /* Build message header */ | |
365ad353 | 796 | msg_set_type(hdr, TIPC_MCAST_MSG); |
a853e4c6 | 797 | msg_set_hdr_sz(hdr, MCAST_H_SIZE); |
365ad353 JPM |
798 | msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); |
799 | msg_set_destport(hdr, 0); | |
800 | msg_set_destnode(hdr, 0); | |
801 | msg_set_nametype(hdr, seq->type); | |
802 | msg_set_namelower(hdr, seq->lower); | |
803 | msg_set_nameupper(hdr, seq->upper); | |
365ad353 | 804 | |
a853e4c6 | 805 | /* Build message as chain of buffers */ |
365ad353 JPM |
806 | skb_queue_head_init(&pkts); |
807 | rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); | |
0abd8ff2 | 808 | |
a853e4c6 JPM |
809 | /* Send message if build was successful */ |
810 | if (unlikely(rc == dlen)) | |
01fd12bb | 811 | rc = tipc_mcast_xmit(net, &pkts, method, &dsts, |
a853e4c6 JPM |
812 | &tsk->cong_link_cnt); |
813 | ||
814 | tipc_nlist_purge(&dsts); | |
365ad353 JPM |
815 | |
816 | return rc ? rc : dlen; | |
0abd8ff2 JPM |
817 | } |
818 | ||
27bd9ec0 JM |
819 | /** |
820 | * tipc_send_group_msg - send a message to a member in the group | |
821 | * @net: network namespace | |
822 | * @m: message to send | |
823 | * @mb: group member | |
824 | * @dnode: destination node | |
825 | * @dport: destination port | |
826 | * @dlen: total length of message data | |
827 | */ | |
828 | static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk, | |
829 | struct msghdr *m, struct tipc_member *mb, | |
830 | u32 dnode, u32 dport, int dlen) | |
831 | { | |
b87a5ea3 | 832 | u16 bc_snd_nxt = tipc_group_bc_snd_nxt(tsk->group); |
2f487712 | 833 | struct tipc_mc_method *method = &tsk->mc_method; |
27bd9ec0 JM |
834 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); |
835 | struct tipc_msg *hdr = &tsk->phdr; | |
836 | struct sk_buff_head pkts; | |
837 | int mtu, rc; | |
838 | ||
839 | /* Complete message header */ | |
840 | msg_set_type(hdr, TIPC_GRP_UCAST_MSG); | |
841 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); | |
842 | msg_set_destport(hdr, dport); | |
843 | msg_set_destnode(hdr, dnode); | |
b87a5ea3 | 844 | msg_set_grp_bc_seqno(hdr, bc_snd_nxt); |
27bd9ec0 JM |
845 | |
846 | /* Build message as chain of buffers */ | |
847 | skb_queue_head_init(&pkts); | |
848 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); | |
849 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); | |
850 | if (unlikely(rc != dlen)) | |
851 | return rc; | |
852 | ||
853 | /* Send message */ | |
854 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
855 | if (unlikely(rc == -ELINKCONG)) { | |
856 | tipc_dest_push(&tsk->cong_links, dnode, 0); | |
857 | tsk->cong_link_cnt++; | |
858 | } | |
859 | ||
2f487712 | 860 | /* Update send window */ |
27bd9ec0 JM |
861 | tipc_group_update_member(mb, blks); |
862 | ||
2f487712 JM |
863 | /* A broadcast sent within next EXPIRE period must follow same path */ |
864 | method->rcast = true; | |
865 | method->mandatory = true; | |
27bd9ec0 JM |
866 | return dlen; |
867 | } | |
868 | ||
869 | /** | |
870 | * tipc_send_group_unicast - send message to a member in the group | |
871 | * @sock: socket structure | |
872 | * @m: message to send | |
873 | * @dlen: total length of message data | |
874 | * @timeout: timeout to wait for wakeup | |
875 | * | |
876 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
877 | * Returns the number of bytes sent on success, or errno | |
878 | */ | |
879 | static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m, | |
880 | int dlen, long timeout) | |
881 | { | |
882 | struct sock *sk = sock->sk; | |
883 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
884 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
885 | struct tipc_sock *tsk = tipc_sk(sk); | |
886 | struct tipc_group *grp = tsk->group; | |
887 | struct net *net = sock_net(sk); | |
888 | struct tipc_member *mb = NULL; | |
889 | u32 node, port; | |
890 | int rc; | |
891 | ||
892 | node = dest->addr.id.node; | |
893 | port = dest->addr.id.ref; | |
894 | if (!port && !node) | |
895 | return -EHOSTUNREACH; | |
896 | ||
897 | /* Block or return if destination link or member is congested */ | |
898 | rc = tipc_wait_for_cond(sock, &timeout, | |
899 | !tipc_dest_find(&tsk->cong_links, node, 0) && | |
900 | !tipc_group_cong(grp, node, port, blks, &mb)); | |
901 | if (unlikely(rc)) | |
902 | return rc; | |
903 | ||
904 | if (unlikely(!mb)) | |
905 | return -EHOSTUNREACH; | |
906 | ||
907 | rc = tipc_send_group_msg(net, tsk, m, mb, node, port, dlen); | |
908 | ||
909 | return rc ? rc : dlen; | |
910 | } | |
911 | ||
ee106d7f JM |
912 | /** |
913 | * tipc_send_group_anycast - send message to any member with given identity | |
914 | * @sock: socket structure | |
915 | * @m: message to send | |
916 | * @dlen: total length of message data | |
917 | * @timeout: timeout to wait for wakeup | |
918 | * | |
919 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
920 | * Returns the number of bytes sent on success, or errno | |
921 | */ | |
922 | static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m, | |
923 | int dlen, long timeout) | |
924 | { | |
925 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
926 | struct sock *sk = sock->sk; | |
927 | struct tipc_sock *tsk = tipc_sk(sk); | |
928 | struct list_head *cong_links = &tsk->cong_links; | |
929 | int blks = tsk_blocks(GROUP_H_SIZE + dlen); | |
930 | struct tipc_group *grp = tsk->group; | |
931 | struct tipc_member *first = NULL; | |
932 | struct tipc_member *mbr = NULL; | |
933 | struct net *net = sock_net(sk); | |
934 | u32 node, port, exclude; | |
935 | u32 type, inst, domain; | |
936 | struct list_head dsts; | |
937 | int lookups = 0; | |
938 | int dstcnt, rc; | |
939 | bool cong; | |
940 | ||
941 | INIT_LIST_HEAD(&dsts); | |
942 | ||
943 | type = dest->addr.name.name.type; | |
944 | inst = dest->addr.name.name.instance; | |
945 | domain = addr_domain(net, dest->scope); | |
946 | exclude = tipc_group_exclude(grp); | |
947 | ||
948 | while (++lookups < 4) { | |
949 | first = NULL; | |
950 | ||
951 | /* Look for a non-congested destination member, if any */ | |
952 | while (1) { | |
953 | if (!tipc_nametbl_lookup(net, type, inst, domain, &dsts, | |
954 | &dstcnt, exclude, false)) | |
955 | return -EHOSTUNREACH; | |
956 | tipc_dest_pop(&dsts, &node, &port); | |
957 | cong = tipc_group_cong(grp, node, port, blks, &mbr); | |
958 | if (!cong) | |
959 | break; | |
960 | if (mbr == first) | |
961 | break; | |
962 | if (!first) | |
963 | first = mbr; | |
964 | } | |
965 | ||
966 | /* Start over if destination was not in member list */ | |
967 | if (unlikely(!mbr)) | |
968 | continue; | |
969 | ||
970 | if (likely(!cong && !tipc_dest_find(cong_links, node, 0))) | |
971 | break; | |
972 | ||
973 | /* Block or return if destination link or member is congested */ | |
974 | rc = tipc_wait_for_cond(sock, &timeout, | |
975 | !tipc_dest_find(cong_links, node, 0) && | |
976 | !tipc_group_cong(grp, node, port, | |
977 | blks, &mbr)); | |
978 | if (unlikely(rc)) | |
979 | return rc; | |
980 | ||
981 | /* Send, unless destination disappeared while waiting */ | |
982 | if (likely(mbr)) | |
983 | break; | |
984 | } | |
985 | ||
986 | if (unlikely(lookups >= 4)) | |
987 | return -EHOSTUNREACH; | |
988 | ||
989 | rc = tipc_send_group_msg(net, tsk, m, mbr, node, port, dlen); | |
990 | ||
991 | return rc ? rc : dlen; | |
992 | } | |
993 | ||
75da2163 JM |
994 | /** |
995 | * tipc_send_group_bcast - send message to all members in communication group | |
996 | * @sk: socket structure | |
997 | * @m: message to send | |
998 | * @dlen: total length of message data | |
999 | * @timeout: timeout to wait for wakeup | |
1000 | * | |
1001 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
1002 | * Returns the number of bytes sent on success, or errno | |
1003 | */ | |
1004 | static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m, | |
1005 | int dlen, long timeout) | |
1006 | { | |
5b8dddb6 | 1007 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
75da2163 JM |
1008 | struct sock *sk = sock->sk; |
1009 | struct net *net = sock_net(sk); | |
1010 | struct tipc_sock *tsk = tipc_sk(sk); | |
1011 | struct tipc_group *grp = tsk->group; | |
1012 | struct tipc_nlist *dsts = tipc_group_dests(grp); | |
1013 | struct tipc_mc_method *method = &tsk->mc_method; | |
2f487712 | 1014 | bool ack = method->mandatory && method->rcast; |
b7d42635 | 1015 | int blks = tsk_blocks(MCAST_H_SIZE + dlen); |
75da2163 JM |
1016 | struct tipc_msg *hdr = &tsk->phdr; |
1017 | int mtu = tipc_bcast_get_mtu(net); | |
1018 | struct sk_buff_head pkts; | |
1019 | int rc = -EHOSTUNREACH; | |
1020 | ||
1021 | if (!dsts->local && !dsts->remote) | |
1022 | return -EHOSTUNREACH; | |
1023 | ||
b7d42635 JM |
1024 | /* Block or return if any destination link or member is congested */ |
1025 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt && | |
1026 | !tipc_group_bc_cong(grp, blks)); | |
75da2163 JM |
1027 | if (unlikely(rc)) |
1028 | return rc; | |
1029 | ||
1030 | /* Complete message header */ | |
5b8dddb6 JM |
1031 | if (dest) { |
1032 | msg_set_type(hdr, TIPC_GRP_MCAST_MSG); | |
1033 | msg_set_nameinst(hdr, dest->addr.name.name.instance); | |
1034 | } else { | |
1035 | msg_set_type(hdr, TIPC_GRP_BCAST_MSG); | |
1036 | msg_set_nameinst(hdr, 0); | |
1037 | } | |
b7d42635 | 1038 | msg_set_hdr_sz(hdr, GROUP_H_SIZE); |
75da2163 JM |
1039 | msg_set_destport(hdr, 0); |
1040 | msg_set_destnode(hdr, 0); | |
75da2163 JM |
1041 | msg_set_grp_bc_seqno(hdr, tipc_group_bc_snd_nxt(grp)); |
1042 | ||
2f487712 JM |
1043 | /* Avoid getting stuck with repeated forced replicasts */ |
1044 | msg_set_grp_bc_ack_req(hdr, ack); | |
1045 | ||
75da2163 JM |
1046 | /* Build message as chain of buffers */ |
1047 | skb_queue_head_init(&pkts); | |
1048 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); | |
1049 | if (unlikely(rc != dlen)) | |
1050 | return rc; | |
1051 | ||
1052 | /* Send message */ | |
2f487712 | 1053 | rc = tipc_mcast_xmit(net, &pkts, method, dsts, &tsk->cong_link_cnt); |
75da2163 JM |
1054 | if (unlikely(rc)) |
1055 | return rc; | |
1056 | ||
b7d42635 | 1057 | /* Update broadcast sequence number and send windows */ |
2f487712 JM |
1058 | tipc_group_update_bc_members(tsk->group, blks, ack); |
1059 | ||
1060 | /* Broadcast link is now free to choose method for next broadcast */ | |
1061 | method->mandatory = false; | |
1062 | method->expires = jiffies; | |
1063 | ||
75da2163 JM |
1064 | return dlen; |
1065 | } | |
1066 | ||
5b8dddb6 JM |
1067 | /** |
1068 | * tipc_send_group_mcast - send message to all members with given identity | |
1069 | * @sock: socket structure | |
1070 | * @m: message to send | |
1071 | * @dlen: total length of message data | |
1072 | * @timeout: timeout to wait for wakeup | |
1073 | * | |
1074 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
1075 | * Returns the number of bytes sent on success, or errno | |
1076 | */ | |
1077 | static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m, | |
1078 | int dlen, long timeout) | |
1079 | { | |
1080 | struct sock *sk = sock->sk; | |
1081 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
1082 | struct tipc_name_seq *seq = &dest->addr.nameseq; | |
1083 | struct tipc_sock *tsk = tipc_sk(sk); | |
1084 | struct tipc_group *grp = tsk->group; | |
1085 | struct net *net = sock_net(sk); | |
1086 | u32 domain, exclude, dstcnt; | |
1087 | struct list_head dsts; | |
1088 | ||
1089 | INIT_LIST_HEAD(&dsts); | |
1090 | ||
1091 | if (seq->lower != seq->upper) | |
1092 | return -ENOTSUPP; | |
1093 | ||
1094 | domain = addr_domain(net, dest->scope); | |
1095 | exclude = tipc_group_exclude(grp); | |
1096 | if (!tipc_nametbl_lookup(net, seq->type, seq->lower, domain, | |
1097 | &dsts, &dstcnt, exclude, true)) | |
1098 | return -EHOSTUNREACH; | |
1099 | ||
1100 | if (dstcnt == 1) { | |
1101 | tipc_dest_pop(&dsts, &dest->addr.id.node, &dest->addr.id.ref); | |
1102 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
1103 | } | |
1104 | ||
1105 | tipc_dest_list_purge(&dsts); | |
1106 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
1107 | } | |
1108 | ||
cb1b7280 JPM |
1109 | /** |
1110 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
1111 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
1112 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
1113 | * | |
1114 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 1115 | */ |
cb1b7280 JPM |
1116 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
1117 | struct sk_buff_head *inputq) | |
078bec82 | 1118 | { |
078bec82 | 1119 | u32 scope = TIPC_CLUSTER_SCOPE; |
75da2163 | 1120 | u32 self = tipc_own_addr(net); |
cb1b7280 | 1121 | struct sk_buff *skb, *_skb; |
75da2163 JM |
1122 | u32 lower = 0, upper = ~0; |
1123 | struct sk_buff_head tmpq; | |
1124 | u32 portid, oport, onode; | |
1125 | struct list_head dports; | |
1126 | struct tipc_msg *msg; | |
2f487712 | 1127 | int user, mtyp, hsz; |
3c724acd | 1128 | |
cb1b7280 | 1129 | __skb_queue_head_init(&tmpq); |
4d8642d8 | 1130 | INIT_LIST_HEAD(&dports); |
078bec82 | 1131 | |
cb1b7280 JPM |
1132 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
1133 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
1134 | msg = buf_msg(skb); | |
2f487712 JM |
1135 | user = msg_user(msg); |
1136 | mtyp = msg_type(msg); | |
1137 | if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) { | |
1138 | spin_lock_bh(&inputq->lock); | |
1139 | if (skb_peek(arrvq) == skb) { | |
1140 | __skb_dequeue(arrvq); | |
1141 | __skb_queue_tail(inputq, skb); | |
1142 | } | |
c545a945 | 1143 | kfree_skb(skb); |
2f487712 JM |
1144 | spin_unlock_bh(&inputq->lock); |
1145 | continue; | |
1146 | } | |
cb1b7280 | 1147 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); |
75da2163 JM |
1148 | oport = msg_origport(msg); |
1149 | onode = msg_orignode(msg); | |
1150 | if (onode == self) | |
cb1b7280 JPM |
1151 | scope = TIPC_NODE_SCOPE; |
1152 | ||
1153 | /* Create destination port list and message clones: */ | |
75da2163 JM |
1154 | if (!msg_in_group(msg)) { |
1155 | lower = msg_namelower(msg); | |
1156 | upper = msg_nameupper(msg); | |
1157 | } | |
1158 | tipc_nametbl_mc_translate(net, msg_nametype(msg), lower, upper, | |
1159 | scope, &dports); | |
a80ae530 | 1160 | while (tipc_dest_pop(&dports, NULL, &portid)) { |
cb1b7280 JPM |
1161 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); |
1162 | if (_skb) { | |
1163 | msg_set_destport(buf_msg(_skb), portid); | |
1164 | __skb_queue_tail(&tmpq, _skb); | |
1165 | continue; | |
1166 | } | |
1167 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 1168 | } |
cb1b7280 JPM |
1169 | /* Append to inputq if not already done by other thread */ |
1170 | spin_lock_bh(&inputq->lock); | |
1171 | if (skb_peek(arrvq) == skb) { | |
1172 | skb_queue_splice_tail_init(&tmpq, inputq); | |
1173 | kfree_skb(__skb_dequeue(arrvq)); | |
1174 | } | |
1175 | spin_unlock_bh(&inputq->lock); | |
1176 | __skb_queue_purge(&tmpq); | |
1177 | kfree_skb(skb); | |
078bec82 | 1178 | } |
cb1b7280 | 1179 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
1180 | } |
1181 | ||
ac0074ee | 1182 | /** |
64ac5f59 | 1183 | * tipc_sk_conn_proto_rcv - receive a connection mng protocol message |
ac0074ee | 1184 | * @tsk: receiving socket |
bcd3ffd4 | 1185 | * @skb: pointer to message buffer. |
ac0074ee | 1186 | */ |
64ac5f59 JM |
1187 | static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
1188 | struct sk_buff_head *xmitq) | |
ac0074ee | 1189 | { |
bcd3ffd4 | 1190 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
1191 | u32 onode = tsk_own_node(tsk); |
1192 | struct sock *sk = &tsk->sk; | |
bcd3ffd4 | 1193 | int mtyp = msg_type(hdr); |
10724cc7 | 1194 | bool conn_cong; |
bcd3ffd4 | 1195 | |
ac0074ee | 1196 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 1197 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
1198 | goto exit; |
1199 | ||
c1be7756 PB |
1200 | if (unlikely(msg_errcode(hdr))) { |
1201 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1202 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
1203 | tsk_peer_port(tsk)); | |
1204 | sk->sk_state_change(sk); | |
1205 | goto exit; | |
1206 | } | |
1207 | ||
8ea642ee | 1208 | tsk->probe_unacked = false; |
ac0074ee | 1209 | |
bcd3ffd4 JPM |
1210 | if (mtyp == CONN_PROBE) { |
1211 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
1212 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
1213 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
1214 | return; |
1215 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 1216 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
1217 | tsk->snt_unacked -= msg_conn_ack(hdr); |
1218 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
1219 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 1220 | if (conn_cong) |
bcd3ffd4 JPM |
1221 | sk->sk_write_space(sk); |
1222 | } else if (mtyp != CONN_PROBE_REPLY) { | |
1223 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 1224 | } |
ac0074ee | 1225 | exit: |
bcd3ffd4 | 1226 | kfree_skb(skb); |
ac0074ee JPM |
1227 | } |
1228 | ||
b97bf3fd | 1229 | /** |
247f0f3c | 1230 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
1231 | * @sock: socket structure |
1232 | * @m: message to send | |
e2dafe87 | 1233 | * @dsz: amount of user data to be sent |
c4307285 | 1234 | * |
b97bf3fd | 1235 | * Message must have an destination specified explicitly. |
c4307285 | 1236 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
1237 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
1238 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 1239 | * |
b97bf3fd PL |
1240 | * Returns the number of bytes sent on success, or errno otherwise |
1241 | */ | |
1b784140 | 1242 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 1243 | struct msghdr *m, size_t dsz) |
39a0295f YX |
1244 | { |
1245 | struct sock *sk = sock->sk; | |
1246 | int ret; | |
1247 | ||
1248 | lock_sock(sk); | |
1249 | ret = __tipc_sendmsg(sock, m, dsz); | |
1250 | release_sock(sk); | |
1251 | ||
1252 | return ret; | |
1253 | } | |
1254 | ||
365ad353 | 1255 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1256 | { |
0c3141e9 | 1257 | struct sock *sk = sock->sk; |
f2f9800d | 1258 | struct net *net = sock_net(sk); |
365ad353 JPM |
1259 | struct tipc_sock *tsk = tipc_sk(sk); |
1260 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
1261 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); | |
1262 | struct list_head *clinks = &tsk->cong_links; | |
1263 | bool syn = !tipc_sk_type_connectionless(sk); | |
75da2163 | 1264 | struct tipc_group *grp = tsk->group; |
365ad353 | 1265 | struct tipc_msg *hdr = &tsk->phdr; |
f2f8036e | 1266 | struct tipc_name_seq *seq; |
365ad353 JPM |
1267 | struct sk_buff_head pkts; |
1268 | u32 type, inst, domain; | |
1269 | u32 dnode, dport; | |
1270 | int mtu, rc; | |
b97bf3fd | 1271 | |
365ad353 | 1272 | if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE)) |
c29c3f70 | 1273 | return -EMSGSIZE; |
365ad353 | 1274 | |
27bd9ec0 JM |
1275 | if (likely(dest)) { |
1276 | if (unlikely(m->msg_namelen < sizeof(*dest))) | |
1277 | return -EINVAL; | |
1278 | if (unlikely(dest->family != AF_TIPC)) | |
1279 | return -EINVAL; | |
1280 | } | |
1281 | ||
1282 | if (grp) { | |
1283 | if (!dest) | |
1284 | return tipc_send_group_bcast(sock, m, dlen, timeout); | |
ee106d7f JM |
1285 | if (dest->addrtype == TIPC_ADDR_NAME) |
1286 | return tipc_send_group_anycast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1287 | if (dest->addrtype == TIPC_ADDR_ID) |
1288 | return tipc_send_group_unicast(sock, m, dlen, timeout); | |
5b8dddb6 JM |
1289 | if (dest->addrtype == TIPC_ADDR_MCAST) |
1290 | return tipc_send_group_mcast(sock, m, dlen, timeout); | |
27bd9ec0 JM |
1291 | return -EINVAL; |
1292 | } | |
75da2163 | 1293 | |
f2f8036e | 1294 | if (unlikely(!dest)) { |
365ad353 JPM |
1295 | dest = &tsk->peer; |
1296 | if (!syn || dest->family != AF_TIPC) | |
f2f8036e | 1297 | return -EDESTADDRREQ; |
f2f8036e | 1298 | } |
365ad353 | 1299 | |
365ad353 | 1300 | if (unlikely(syn)) { |
0c288c86 | 1301 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 1302 | return -EPIPE; |
438adcaf | 1303 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
1304 | return -EISCONN; |
1305 | if (tsk->published) | |
1306 | return -EOPNOTSUPP; | |
3388007b | 1307 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
1308 | tsk->conn_type = dest->addr.name.name.type; |
1309 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 1310 | } |
b97bf3fd | 1311 | } |
e2dafe87 | 1312 | |
365ad353 JPM |
1313 | seq = &dest->addr.nameseq; |
1314 | if (dest->addrtype == TIPC_ADDR_MCAST) | |
1315 | return tipc_sendmcast(sock, seq, m, dlen, timeout); | |
e2dafe87 | 1316 | |
365ad353 JPM |
1317 | if (dest->addrtype == TIPC_ADDR_NAME) { |
1318 | type = dest->addr.name.name.type; | |
1319 | inst = dest->addr.name.name.instance; | |
1320 | domain = dest->addr.name.domain; | |
e2dafe87 | 1321 | dnode = domain; |
365ad353 JPM |
1322 | msg_set_type(hdr, TIPC_NAMED_MSG); |
1323 | msg_set_hdr_sz(hdr, NAMED_H_SIZE); | |
1324 | msg_set_nametype(hdr, type); | |
1325 | msg_set_nameinst(hdr, inst); | |
1326 | msg_set_lookup_scope(hdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 1327 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
365ad353 JPM |
1328 | msg_set_destnode(hdr, dnode); |
1329 | msg_set_destport(hdr, dport); | |
39a0295f YX |
1330 | if (unlikely(!dport && !dnode)) |
1331 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
1332 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
1333 | dnode = dest->addr.id.node; | |
365ad353 JPM |
1334 | msg_set_type(hdr, TIPC_DIRECT_MSG); |
1335 | msg_set_lookup_scope(hdr, 0); | |
1336 | msg_set_destnode(hdr, dnode); | |
1337 | msg_set_destport(hdr, dest->addr.id.ref); | |
1338 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); | |
e2dafe87 JPM |
1339 | } |
1340 | ||
365ad353 | 1341 | /* Block or return if destination link is congested */ |
a80ae530 JM |
1342 | rc = tipc_wait_for_cond(sock, &timeout, |
1343 | !tipc_dest_find(clinks, dnode, 0)); | |
365ad353 JPM |
1344 | if (unlikely(rc)) |
1345 | return rc; | |
1346 | ||
1347 | skb_queue_head_init(&pkts); | |
f2f9800d | 1348 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
365ad353 JPM |
1349 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
1350 | if (unlikely(rc != dlen)) | |
39a0295f | 1351 | return rc; |
e2dafe87 | 1352 | |
365ad353 JPM |
1353 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); |
1354 | if (unlikely(rc == -ELINKCONG)) { | |
a80ae530 | 1355 | tipc_dest_push(clinks, dnode, 0); |
365ad353 JPM |
1356 | tsk->cong_link_cnt++; |
1357 | rc = 0; | |
1358 | } | |
e2dafe87 | 1359 | |
365ad353 JPM |
1360 | if (unlikely(syn && !rc)) |
1361 | tipc_set_sk_state(sk, TIPC_CONNECTING); | |
1362 | ||
1363 | return rc ? rc : dlen; | |
b97bf3fd PL |
1364 | } |
1365 | ||
c4307285 | 1366 | /** |
365ad353 | 1367 | * tipc_sendstream - send stream-oriented data |
b97bf3fd | 1368 | * @sock: socket structure |
4ccfe5e0 JPM |
1369 | * @m: data to send |
1370 | * @dsz: total length of data to be transmitted | |
c4307285 | 1371 | * |
4ccfe5e0 | 1372 | * Used for SOCK_STREAM data. |
c4307285 | 1373 | * |
4ccfe5e0 JPM |
1374 | * Returns the number of bytes sent on success (or partial success), |
1375 | * or errno if no data sent | |
b97bf3fd | 1376 | */ |
365ad353 | 1377 | static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1378 | { |
1379 | struct sock *sk = sock->sk; | |
1380 | int ret; | |
1381 | ||
1382 | lock_sock(sk); | |
365ad353 | 1383 | ret = __tipc_sendstream(sock, m, dsz); |
39a0295f YX |
1384 | release_sock(sk); |
1385 | ||
1386 | return ret; | |
1387 | } | |
1388 | ||
365ad353 | 1389 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1390 | { |
0c3141e9 | 1391 | struct sock *sk = sock->sk; |
342dfc30 | 1392 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
365ad353 JPM |
1393 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
1394 | struct tipc_sock *tsk = tipc_sk(sk); | |
1395 | struct tipc_msg *hdr = &tsk->phdr; | |
1396 | struct net *net = sock_net(sk); | |
1397 | struct sk_buff_head pkts; | |
1398 | u32 dnode = tsk_peer_node(tsk); | |
1399 | int send, sent = 0; | |
1400 | int rc = 0; | |
1d835874 | 1401 | |
365ad353 | 1402 | skb_queue_head_init(&pkts); |
7cf87fa2 | 1403 | |
365ad353 JPM |
1404 | if (unlikely(dlen > INT_MAX)) |
1405 | return -EMSGSIZE; | |
4ccfe5e0 | 1406 | |
365ad353 JPM |
1407 | /* Handle implicit connection setup */ |
1408 | if (unlikely(dest)) { | |
1409 | rc = __tipc_sendmsg(sock, m, dlen); | |
1410 | if (dlen && (dlen == rc)) | |
1411 | tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); | |
39a0295f | 1412 | return rc; |
365ad353 | 1413 | } |
f214fc40 | 1414 | |
c4307285 | 1415 | do { |
365ad353 JPM |
1416 | rc = tipc_wait_for_cond(sock, &timeout, |
1417 | (!tsk->cong_link_cnt && | |
8c44e1af JPM |
1418 | !tsk_conn_cong(tsk) && |
1419 | tipc_sk_connected(sk))); | |
365ad353 JPM |
1420 | if (unlikely(rc)) |
1421 | break; | |
1422 | ||
1423 | send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE); | |
1424 | rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts); | |
1425 | if (unlikely(rc != send)) | |
1426 | break; | |
1427 | ||
1428 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
1429 | if (unlikely(rc == -ELINKCONG)) { | |
1430 | tsk->cong_link_cnt = 1; | |
1431 | rc = 0; | |
1432 | } | |
1433 | if (likely(!rc)) { | |
1434 | tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE); | |
1435 | sent += send; | |
1436 | } | |
1437 | } while (sent < dlen && !rc); | |
39a0295f | 1438 | |
3364d61c | 1439 | return sent ? sent : rc; |
b97bf3fd PL |
1440 | } |
1441 | ||
c4307285 | 1442 | /** |
4ccfe5e0 | 1443 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1444 | * @sock: socket structure |
4ccfe5e0 JPM |
1445 | * @m: message to send |
1446 | * @dsz: length of data to be transmitted | |
c4307285 | 1447 | * |
4ccfe5e0 | 1448 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1449 | * |
4ccfe5e0 | 1450 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1451 | */ |
1b784140 | 1452 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1453 | { |
4ccfe5e0 JPM |
1454 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1455 | return -EMSGSIZE; | |
b97bf3fd | 1456 | |
365ad353 | 1457 | return tipc_sendstream(sock, m, dsz); |
b97bf3fd PL |
1458 | } |
1459 | ||
dadebc00 | 1460 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1461 | */ |
301bae56 | 1462 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1463 | u32 peer_node) |
b97bf3fd | 1464 | { |
3721e9c7 YX |
1465 | struct sock *sk = &tsk->sk; |
1466 | struct net *net = sock_net(sk); | |
301bae56 | 1467 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1468 | |
dadebc00 JPM |
1469 | msg_set_destnode(msg, peer_node); |
1470 | msg_set_destport(msg, peer_port); | |
1471 | msg_set_type(msg, TIPC_CONN_MSG); | |
1472 | msg_set_lookup_scope(msg, 0); | |
1473 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1474 | |
0d5fcebf | 1475 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
8ea642ee | 1476 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d YX |
1477 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1478 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1479 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1480 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1481 | return; | |
1482 | ||
1483 | /* Fall back to message based flow control */ | |
1484 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1485 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1486 | } |
1487 | ||
1488 | /** | |
31c82a2d | 1489 | * tipc_sk_set_orig_addr - capture sender's address for received message |
b97bf3fd | 1490 | * @m: descriptor for message info |
31c82a2d | 1491 | * @hdr: received message header |
c4307285 | 1492 | * |
b97bf3fd PL |
1493 | * Note: Address is not captured if not requested by receiver. |
1494 | */ | |
31c82a2d | 1495 | static void tipc_sk_set_orig_addr(struct msghdr *m, struct sk_buff *skb) |
b97bf3fd | 1496 | { |
31c82a2d JM |
1497 | DECLARE_SOCKADDR(struct sockaddr_pair *, srcaddr, m->msg_name); |
1498 | struct tipc_msg *hdr = buf_msg(skb); | |
1499 | ||
1500 | if (!srcaddr) | |
1501 | return; | |
1502 | ||
1503 | srcaddr->sock.family = AF_TIPC; | |
1504 | srcaddr->sock.addrtype = TIPC_ADDR_ID; | |
1505 | srcaddr->sock.addr.id.ref = msg_origport(hdr); | |
1506 | srcaddr->sock.addr.id.node = msg_orignode(hdr); | |
1507 | srcaddr->sock.addr.name.domain = 0; | |
1508 | srcaddr->sock.scope = 0; | |
1509 | m->msg_namelen = sizeof(struct sockaddr_tipc); | |
1510 | ||
1511 | if (!msg_in_group(hdr)) | |
1512 | return; | |
1513 | ||
1514 | /* Group message users may also want to know sending member's id */ | |
1515 | srcaddr->member.family = AF_TIPC; | |
1516 | srcaddr->member.addrtype = TIPC_ADDR_NAME; | |
1517 | srcaddr->member.addr.name.name.type = msg_nametype(hdr); | |
1518 | srcaddr->member.addr.name.name.instance = TIPC_SKB_CB(skb)->orig_member; | |
1519 | srcaddr->member.addr.name.domain = 0; | |
1520 | m->msg_namelen = sizeof(*srcaddr); | |
b97bf3fd PL |
1521 | } |
1522 | ||
1523 | /** | |
301bae56 | 1524 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1525 | * @m: descriptor for message info |
1526 | * @msg: received message header | |
301bae56 | 1527 | * @tsk: TIPC port associated with message |
c4307285 | 1528 | * |
b97bf3fd | 1529 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1530 | * |
b97bf3fd PL |
1531 | * Returns 0 if successful, otherwise errno |
1532 | */ | |
301bae56 JPM |
1533 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1534 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1535 | { |
1536 | u32 anc_data[3]; | |
1537 | u32 err; | |
1538 | u32 dest_type; | |
3546c750 | 1539 | int has_name; |
b97bf3fd PL |
1540 | int res; |
1541 | ||
1542 | if (likely(m->msg_controllen == 0)) | |
1543 | return 0; | |
1544 | ||
1545 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1546 | err = msg ? msg_errcode(msg) : 0; |
1547 | if (unlikely(err)) { | |
1548 | anc_data[0] = err; | |
1549 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1550 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1551 | if (res) | |
b97bf3fd | 1552 | return res; |
2db9983a AS |
1553 | if (anc_data[1]) { |
1554 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1555 | msg_data(msg)); | |
1556 | if (res) | |
1557 | return res; | |
1558 | } | |
b97bf3fd PL |
1559 | } |
1560 | ||
1561 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1562 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1563 | switch (dest_type) { | |
1564 | case TIPC_NAMED_MSG: | |
3546c750 | 1565 | has_name = 1; |
b97bf3fd PL |
1566 | anc_data[0] = msg_nametype(msg); |
1567 | anc_data[1] = msg_namelower(msg); | |
1568 | anc_data[2] = msg_namelower(msg); | |
1569 | break; | |
1570 | case TIPC_MCAST_MSG: | |
3546c750 | 1571 | has_name = 1; |
b97bf3fd PL |
1572 | anc_data[0] = msg_nametype(msg); |
1573 | anc_data[1] = msg_namelower(msg); | |
1574 | anc_data[2] = msg_nameupper(msg); | |
1575 | break; | |
1576 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1577 | has_name = (tsk->conn_type != 0); |
1578 | anc_data[0] = tsk->conn_type; | |
1579 | anc_data[1] = tsk->conn_instance; | |
1580 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1581 | break; |
1582 | default: | |
3546c750 | 1583 | has_name = 0; |
b97bf3fd | 1584 | } |
2db9983a AS |
1585 | if (has_name) { |
1586 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1587 | if (res) | |
1588 | return res; | |
1589 | } | |
b97bf3fd PL |
1590 | |
1591 | return 0; | |
1592 | } | |
1593 | ||
10724cc7 | 1594 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1595 | { |
d6fb7e9c PB |
1596 | struct sock *sk = &tsk->sk; |
1597 | struct net *net = sock_net(sk); | |
a6ca1094 | 1598 | struct sk_buff *skb = NULL; |
739f5e4e | 1599 | struct tipc_msg *msg; |
301bae56 JPM |
1600 | u32 peer_port = tsk_peer_port(tsk); |
1601 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1602 | |
d6fb7e9c | 1603 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1604 | return; |
c5898636 JPM |
1605 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1606 | dnode, tsk_own_node(tsk), peer_port, | |
1607 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1608 | if (!skb) |
739f5e4e | 1609 | return; |
a6ca1094 | 1610 | msg = buf_msg(skb); |
10724cc7 JPM |
1611 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1612 | tsk->rcv_unacked = 0; | |
1613 | ||
1614 | /* Adjust to and advertize the correct window limit */ | |
1615 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1616 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1617 | msg_set_adv_win(msg, tsk->rcv_win); | |
1618 | } | |
af9b028e | 1619 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1620 | } |
1621 | ||
85d3fc94 | 1622 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1623 | { |
1624 | struct sock *sk = sock->sk; | |
1625 | DEFINE_WAIT(wait); | |
85d3fc94 | 1626 | long timeo = *timeop; |
4e0df495 PB |
1627 | int err = sock_error(sk); |
1628 | ||
1629 | if (err) | |
1630 | return err; | |
9bbb4ecc YX |
1631 | |
1632 | for (;;) { | |
1633 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1634 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1635 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1636 | err = -ENOTCONN; |
1637 | break; | |
1638 | } | |
1639 | release_sock(sk); | |
1640 | timeo = schedule_timeout(timeo); | |
1641 | lock_sock(sk); | |
1642 | } | |
1643 | err = 0; | |
1644 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1645 | break; | |
9bbb4ecc YX |
1646 | err = -EAGAIN; |
1647 | if (!timeo) | |
1648 | break; | |
143fe22f EH |
1649 | err = sock_intr_errno(timeo); |
1650 | if (signal_pending(current)) | |
1651 | break; | |
4e0df495 PB |
1652 | |
1653 | err = sock_error(sk); | |
1654 | if (err) | |
1655 | break; | |
9bbb4ecc YX |
1656 | } |
1657 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1658 | *timeop = timeo; |
9bbb4ecc YX |
1659 | return err; |
1660 | } | |
1661 | ||
c4307285 | 1662 | /** |
247f0f3c | 1663 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd | 1664 | * @m: descriptor for message info |
e9f8b101 | 1665 | * @buflen: length of user buffer area |
b97bf3fd | 1666 | * @flags: receive flags |
c4307285 | 1667 | * |
b97bf3fd PL |
1668 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1669 | * If the complete message doesn't fit in user area, truncate it. | |
1670 | * | |
1671 | * Returns size of returned message data, errno otherwise | |
1672 | */ | |
e9f8b101 JPM |
1673 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, |
1674 | size_t buflen, int flags) | |
b97bf3fd | 1675 | { |
0c3141e9 | 1676 | struct sock *sk = sock->sk; |
e9f8b101 | 1677 | bool connected = !tipc_sk_type_connectionless(sk); |
ae236fb2 | 1678 | struct tipc_sock *tsk = tipc_sk(sk); |
e9f8b101 | 1679 | int rc, err, hlen, dlen, copy; |
b7d42635 | 1680 | struct sk_buff_head xmitq; |
ae236fb2 JM |
1681 | struct tipc_msg *hdr; |
1682 | struct sk_buff *skb; | |
1683 | bool grp_evt; | |
e9f8b101 | 1684 | long timeout; |
b97bf3fd | 1685 | |
0c3141e9 | 1686 | /* Catch invalid receive requests */ |
e9f8b101 | 1687 | if (unlikely(!buflen)) |
b97bf3fd PL |
1688 | return -EINVAL; |
1689 | ||
0c3141e9 | 1690 | lock_sock(sk); |
e9f8b101 JPM |
1691 | if (unlikely(connected && sk->sk_state == TIPC_OPEN)) { |
1692 | rc = -ENOTCONN; | |
b97bf3fd PL |
1693 | goto exit; |
1694 | } | |
e9f8b101 | 1695 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1696 | |
b7d42635 | 1697 | /* Step rcv queue to first msg with data or error; wait if necessary */ |
e9f8b101 | 1698 | do { |
e9f8b101 JPM |
1699 | rc = tipc_wait_for_rcvmsg(sock, &timeout); |
1700 | if (unlikely(rc)) | |
1701 | goto exit; | |
1702 | skb = skb_peek(&sk->sk_receive_queue); | |
1703 | hdr = buf_msg(skb); | |
1704 | dlen = msg_data_sz(hdr); | |
1705 | hlen = msg_hdr_sz(hdr); | |
1706 | err = msg_errcode(hdr); | |
ae236fb2 | 1707 | grp_evt = msg_is_grp_evt(hdr); |
e9f8b101 JPM |
1708 | if (likely(dlen || err)) |
1709 | break; | |
2e84c60b | 1710 | tsk_advance_rx_queue(sk); |
e9f8b101 | 1711 | } while (1); |
b97bf3fd | 1712 | |
e9f8b101 | 1713 | /* Collect msg meta data, including error code and rejected data */ |
31c82a2d | 1714 | tipc_sk_set_orig_addr(m, skb); |
e9f8b101 JPM |
1715 | rc = tipc_sk_anc_data_recv(m, hdr, tsk); |
1716 | if (unlikely(rc)) | |
b97bf3fd PL |
1717 | goto exit; |
1718 | ||
e9f8b101 JPM |
1719 | /* Capture data if non-error msg, otherwise just set return value */ |
1720 | if (likely(!err)) { | |
1721 | copy = min_t(int, dlen, buflen); | |
1722 | if (unlikely(copy != dlen)) | |
b97bf3fd | 1723 | m->msg_flags |= MSG_TRUNC; |
e9f8b101 | 1724 | rc = skb_copy_datagram_msg(skb, hlen, m, copy); |
b97bf3fd | 1725 | } else { |
e9f8b101 JPM |
1726 | copy = 0; |
1727 | rc = 0; | |
1728 | if (err != TIPC_CONN_SHUTDOWN && connected && !m->msg_control) | |
1729 | rc = -ECONNRESET; | |
b97bf3fd | 1730 | } |
e9f8b101 JPM |
1731 | if (unlikely(rc)) |
1732 | goto exit; | |
b97bf3fd | 1733 | |
ae236fb2 JM |
1734 | /* Mark message as group event if applicable */ |
1735 | if (unlikely(grp_evt)) { | |
1736 | if (msg_grp_evt(hdr) == TIPC_WITHDRAWN) | |
1737 | m->msg_flags |= MSG_EOR; | |
1738 | m->msg_flags |= MSG_OOB; | |
1739 | copy = 0; | |
1740 | } | |
1741 | ||
e9f8b101 | 1742 | /* Caption of data or error code/rejected data was successful */ |
10724cc7 JPM |
1743 | if (unlikely(flags & MSG_PEEK)) |
1744 | goto exit; | |
1745 | ||
b7d42635 JM |
1746 | /* Send group flow control advertisement when applicable */ |
1747 | if (tsk->group && msg_in_group(hdr) && !grp_evt) { | |
1748 | skb_queue_head_init(&xmitq); | |
1749 | tipc_group_update_rcv_win(tsk->group, tsk_blocks(hlen + dlen), | |
1750 | msg_orignode(hdr), msg_origport(hdr), | |
1751 | &xmitq); | |
1752 | tipc_node_distr_xmit(sock_net(sk), &xmitq); | |
1753 | } | |
1754 | ||
10724cc7 | 1755 | tsk_advance_rx_queue(sk); |
ae236fb2 | 1756 | |
e9f8b101 JPM |
1757 | if (likely(!connected)) |
1758 | goto exit; | |
1759 | ||
b7d42635 | 1760 | /* Send connection flow control advertisement when applicable */ |
e9f8b101 JPM |
1761 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); |
1762 | if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE) | |
1763 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1764 | exit: |
0c3141e9 | 1765 | release_sock(sk); |
e9f8b101 | 1766 | return rc ? rc : copy; |
b97bf3fd PL |
1767 | } |
1768 | ||
c4307285 | 1769 | /** |
ec8a09fb | 1770 | * tipc_recvstream - receive stream-oriented data |
b97bf3fd | 1771 | * @m: descriptor for message info |
ec8a09fb | 1772 | * @buflen: total size of user buffer area |
b97bf3fd | 1773 | * @flags: receive flags |
c4307285 YH |
1774 | * |
1775 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1776 | * will optionally wait for more; never truncates data. |
1777 | * | |
1778 | * Returns size of returned message data, errno otherwise | |
1779 | */ | |
ec8a09fb JPM |
1780 | static int tipc_recvstream(struct socket *sock, struct msghdr *m, |
1781 | size_t buflen, int flags) | |
b97bf3fd | 1782 | { |
0c3141e9 | 1783 | struct sock *sk = sock->sk; |
58ed9442 | 1784 | struct tipc_sock *tsk = tipc_sk(sk); |
ec8a09fb JPM |
1785 | struct sk_buff *skb; |
1786 | struct tipc_msg *hdr; | |
1787 | struct tipc_skb_cb *skb_cb; | |
1788 | bool peek = flags & MSG_PEEK; | |
1789 | int offset, required, copy, copied = 0; | |
1790 | int hlen, dlen, err, rc; | |
1791 | long timeout; | |
b97bf3fd | 1792 | |
0c3141e9 | 1793 | /* Catch invalid receive attempts */ |
ec8a09fb | 1794 | if (unlikely(!buflen)) |
b97bf3fd PL |
1795 | return -EINVAL; |
1796 | ||
0c3141e9 | 1797 | lock_sock(sk); |
b97bf3fd | 1798 | |
438adcaf | 1799 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
ec8a09fb | 1800 | rc = -ENOTCONN; |
9bbb4ecc | 1801 | goto exit; |
b97bf3fd | 1802 | } |
ec8a09fb JPM |
1803 | required = sock_rcvlowat(sk, flags & MSG_WAITALL, buflen); |
1804 | timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
b97bf3fd | 1805 | |
ec8a09fb JPM |
1806 | do { |
1807 | /* Look at first msg in receive queue; wait if necessary */ | |
1808 | rc = tipc_wait_for_rcvmsg(sock, &timeout); | |
1809 | if (unlikely(rc)) | |
1810 | break; | |
1811 | skb = skb_peek(&sk->sk_receive_queue); | |
1812 | skb_cb = TIPC_SKB_CB(skb); | |
1813 | hdr = buf_msg(skb); | |
1814 | dlen = msg_data_sz(hdr); | |
1815 | hlen = msg_hdr_sz(hdr); | |
1816 | err = msg_errcode(hdr); | |
0232fd0a | 1817 | |
ec8a09fb JPM |
1818 | /* Discard any empty non-errored (SYN-) message */ |
1819 | if (unlikely(!dlen && !err)) { | |
1820 | tsk_advance_rx_queue(sk); | |
1821 | continue; | |
1822 | } | |
0232fd0a | 1823 | |
ec8a09fb JPM |
1824 | /* Collect msg meta data, incl. error code and rejected data */ |
1825 | if (!copied) { | |
31c82a2d | 1826 | tipc_sk_set_orig_addr(m, skb); |
ec8a09fb JPM |
1827 | rc = tipc_sk_anc_data_recv(m, hdr, tsk); |
1828 | if (rc) | |
1829 | break; | |
1830 | } | |
b97bf3fd | 1831 | |
ec8a09fb JPM |
1832 | /* Copy data if msg ok, otherwise return error/partial data */ |
1833 | if (likely(!err)) { | |
1834 | offset = skb_cb->bytes_read; | |
1835 | copy = min_t(int, dlen - offset, buflen - copied); | |
1836 | rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy); | |
1837 | if (unlikely(rc)) | |
1838 | break; | |
1839 | copied += copy; | |
1840 | offset += copy; | |
1841 | if (unlikely(offset < dlen)) { | |
1842 | if (!peek) | |
1843 | skb_cb->bytes_read = offset; | |
1844 | break; | |
1845 | } | |
1846 | } else { | |
1847 | rc = 0; | |
1848 | if ((err != TIPC_CONN_SHUTDOWN) && !m->msg_control) | |
1849 | rc = -ECONNRESET; | |
1850 | if (copied || rc) | |
1851 | break; | |
b97bf3fd | 1852 | } |
b97bf3fd | 1853 | |
ec8a09fb JPM |
1854 | if (unlikely(peek)) |
1855 | break; | |
b97bf3fd | 1856 | |
ec8a09fb | 1857 | tsk_advance_rx_queue(sk); |
10724cc7 | 1858 | |
ec8a09fb JPM |
1859 | /* Send connection flow control advertisement when applicable */ |
1860 | tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen); | |
1861 | if (unlikely(tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE)) | |
1862 | tipc_sk_send_ack(tsk); | |
b97bf3fd | 1863 | |
ec8a09fb JPM |
1864 | /* Exit if all requested data or FIN/error received */ |
1865 | if (copied == buflen || err) | |
1866 | break; | |
b97bf3fd | 1867 | |
ec8a09fb | 1868 | } while (!skb_queue_empty(&sk->sk_receive_queue) || copied < required); |
b97bf3fd | 1869 | exit: |
0c3141e9 | 1870 | release_sock(sk); |
ec8a09fb | 1871 | return copied ? copied : rc; |
b97bf3fd PL |
1872 | } |
1873 | ||
f288bef4 YX |
1874 | /** |
1875 | * tipc_write_space - wake up thread if port congestion is released | |
1876 | * @sk: socket | |
1877 | */ | |
1878 | static void tipc_write_space(struct sock *sk) | |
1879 | { | |
1880 | struct socket_wq *wq; | |
1881 | ||
1882 | rcu_read_lock(); | |
1883 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1884 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1885 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1886 | POLLWRNORM | POLLWRBAND); | |
1887 | rcu_read_unlock(); | |
1888 | } | |
1889 | ||
1890 | /** | |
1891 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1892 | * @sk: socket | |
1893 | * @len: the length of messages | |
1894 | */ | |
676d2369 | 1895 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1896 | { |
1897 | struct socket_wq *wq; | |
1898 | ||
1899 | rcu_read_lock(); | |
1900 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1901 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1902 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1903 | POLLRDNORM | POLLRDBAND); | |
1904 | rcu_read_unlock(); | |
1905 | } | |
1906 | ||
f4195d1e YX |
1907 | static void tipc_sock_destruct(struct sock *sk) |
1908 | { | |
1909 | __skb_queue_purge(&sk->sk_receive_queue); | |
1910 | } | |
1911 | ||
64ac5f59 JM |
1912 | static void tipc_sk_proto_rcv(struct sock *sk, |
1913 | struct sk_buff_head *inputq, | |
1914 | struct sk_buff_head *xmitq) | |
1915 | { | |
1916 | struct sk_buff *skb = __skb_dequeue(inputq); | |
1917 | struct tipc_sock *tsk = tipc_sk(sk); | |
1918 | struct tipc_msg *hdr = buf_msg(skb); | |
75da2163 | 1919 | struct tipc_group *grp = tsk->group; |
b7d42635 | 1920 | bool wakeup = false; |
64ac5f59 JM |
1921 | |
1922 | switch (msg_user(hdr)) { | |
1923 | case CONN_MANAGER: | |
1924 | tipc_sk_conn_proto_rcv(tsk, skb, xmitq); | |
1925 | return; | |
1926 | case SOCK_WAKEUP: | |
a80ae530 | 1927 | tipc_dest_del(&tsk->cong_links, msg_orignode(hdr), 0); |
64ac5f59 | 1928 | tsk->cong_link_cnt--; |
b7d42635 | 1929 | wakeup = true; |
64ac5f59 | 1930 | break; |
75da2163 | 1931 | case GROUP_PROTOCOL: |
b7d42635 | 1932 | tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq); |
75da2163 | 1933 | break; |
64ac5f59 | 1934 | case TOP_SRV: |
b7d42635 JM |
1935 | tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf, |
1936 | skb, inputq, xmitq); | |
75da2163 | 1937 | skb = NULL; |
64ac5f59 JM |
1938 | break; |
1939 | default: | |
1940 | break; | |
1941 | } | |
1942 | ||
b7d42635 JM |
1943 | if (wakeup) |
1944 | sk->sk_write_space(sk); | |
1945 | ||
64ac5f59 JM |
1946 | kfree_skb(skb); |
1947 | } | |
1948 | ||
7e6c131e | 1949 | /** |
64ac5f59 | 1950 | * tipc_filter_connect - Handle incoming message for a connection-based socket |
58ed9442 | 1951 | * @tsk: TIPC socket |
1186adf7 | 1952 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1953 | * |
cda3696d | 1954 | * Returns true if everything ok, false otherwise |
7e6c131e | 1955 | */ |
64ac5f59 | 1956 | static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1957 | { |
58ed9442 | 1958 | struct sock *sk = &tsk->sk; |
f2f9800d | 1959 | struct net *net = sock_net(sk); |
cda3696d | 1960 | struct tipc_msg *hdr = buf_msg(skb); |
4e0df495 PB |
1961 | u32 pport = msg_origport(hdr); |
1962 | u32 pnode = msg_orignode(hdr); | |
7e6c131e | 1963 | |
cda3696d JPM |
1964 | if (unlikely(msg_mcast(hdr))) |
1965 | return false; | |
7e6c131e | 1966 | |
99a20889 PB |
1967 | switch (sk->sk_state) { |
1968 | case TIPC_CONNECTING: | |
cda3696d | 1969 | /* Accept only ACK or NACK message */ |
4e0df495 PB |
1970 | if (unlikely(!msg_connected(hdr))) { |
1971 | if (pport != tsk_peer_port(tsk) || | |
1972 | pnode != tsk_peer_node(tsk)) | |
1973 | return false; | |
1974 | ||
1975 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1976 | sk->sk_err = ECONNREFUSED; | |
1977 | sk->sk_state_change(sk); | |
1978 | return true; | |
1979 | } | |
dadebc00 | 1980 | |
cda3696d | 1981 | if (unlikely(msg_errcode(hdr))) { |
9fd4b070 | 1982 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2c8d8518 | 1983 | sk->sk_err = ECONNREFUSED; |
4e0df495 | 1984 | sk->sk_state_change(sk); |
cda3696d | 1985 | return true; |
584d24b3 YX |
1986 | } |
1987 | ||
cda3696d | 1988 | if (unlikely(!msg_isdata(hdr))) { |
9fd4b070 | 1989 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
dadebc00 | 1990 | sk->sk_err = EINVAL; |
4e0df495 | 1991 | sk->sk_state_change(sk); |
cda3696d | 1992 | return true; |
584d24b3 YX |
1993 | } |
1994 | ||
cda3696d JPM |
1995 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1996 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 | 1997 | |
cda3696d JPM |
1998 | /* If 'ACK+' message, add to socket receive queue */ |
1999 | if (msg_data_sz(hdr)) | |
2000 | return true; | |
2001 | ||
2002 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
42b531de | 2003 | sk->sk_data_ready(sk); |
cda3696d JPM |
2004 | |
2005 | /* 'ACK-' message is neither accepted nor rejected: */ | |
2006 | msg_set_dest_droppable(hdr, 1); | |
2007 | return false; | |
cda3696d | 2008 | |
438adcaf | 2009 | case TIPC_OPEN: |
9fd4b070 | 2010 | case TIPC_DISCONNECTING: |
438adcaf PB |
2011 | break; |
2012 | case TIPC_LISTEN: | |
7e6c131e | 2013 | /* Accept only SYN message */ |
cda3696d JPM |
2014 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
2015 | return true; | |
7e6c131e | 2016 | break; |
f40acbaf PB |
2017 | case TIPC_ESTABLISHED: |
2018 | /* Accept only connection-based messages sent by peer */ | |
2019 | if (unlikely(!tsk_peer_msg(tsk, hdr))) | |
2020 | return false; | |
2021 | ||
2022 | if (unlikely(msg_errcode(hdr))) { | |
2023 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
2024 | /* Let timer expire on it's own */ | |
2025 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
2026 | tsk->portid); | |
2027 | sk->sk_state_change(sk); | |
2028 | } | |
2029 | return true; | |
7e6c131e | 2030 | default: |
438adcaf | 2031 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 2032 | } |
438adcaf | 2033 | |
cda3696d | 2034 | return false; |
7e6c131e YX |
2035 | } |
2036 | ||
aba79f33 YX |
2037 | /** |
2038 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
2039 | * @sk: socket | |
10724cc7 | 2040 | * @skb: message |
aba79f33 | 2041 | * |
10724cc7 JPM |
2042 | * For connection oriented messages, irrespective of importance, |
2043 | * default queue limit is 2 MB. | |
aba79f33 | 2044 | * |
10724cc7 JPM |
2045 | * For connectionless messages, queue limits are based on message |
2046 | * importance as follows: | |
aba79f33 | 2047 | * |
10724cc7 JPM |
2048 | * TIPC_LOW_IMPORTANCE (2 MB) |
2049 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
2050 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
2051 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
2052 | * |
2053 | * Returns overload limit according to corresponding message importance | |
2054 | */ | |
10724cc7 | 2055 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 2056 | { |
10724cc7 JPM |
2057 | struct tipc_sock *tsk = tipc_sk(sk); |
2058 | struct tipc_msg *hdr = buf_msg(skb); | |
2059 | ||
b7d42635 JM |
2060 | if (unlikely(msg_in_group(hdr))) |
2061 | return sk->sk_rcvbuf; | |
2062 | ||
10724cc7 JPM |
2063 | if (unlikely(!msg_connected(hdr))) |
2064 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 2065 | |
10724cc7 JPM |
2066 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
2067 | return sk->sk_rcvbuf; | |
0cee6bbe | 2068 | |
10724cc7 | 2069 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
2070 | } |
2071 | ||
c4307285 | 2072 | /** |
64ac5f59 | 2073 | * tipc_sk_filter_rcv - validate incoming message |
0c3141e9 | 2074 | * @sk: socket |
cda3696d | 2075 | * @skb: pointer to message. |
c4307285 | 2076 | * |
0c3141e9 AS |
2077 | * Enqueues message on receive queue if acceptable; optionally handles |
2078 | * disconnect indication for a connected socket. | |
2079 | * | |
1186adf7 | 2080 | * Called with socket lock already taken |
c4307285 | 2081 | * |
b97bf3fd | 2082 | */ |
64ac5f59 JM |
2083 | static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb, |
2084 | struct sk_buff_head *xmitq) | |
b97bf3fd | 2085 | { |
64ac5f59 | 2086 | bool sk_conn = !tipc_sk_type_connectionless(sk); |
58ed9442 | 2087 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2088 | struct tipc_group *grp = tsk->group; |
cda3696d | 2089 | struct tipc_msg *hdr = buf_msg(skb); |
64ac5f59 JM |
2090 | struct net *net = sock_net(sk); |
2091 | struct sk_buff_head inputq; | |
2092 | int limit, err = TIPC_OK; | |
ec8a2e56 | 2093 | |
64ac5f59 JM |
2094 | TIPC_SKB_CB(skb)->bytes_read = 0; |
2095 | __skb_queue_head_init(&inputq); | |
2096 | __skb_queue_tail(&inputq, skb); | |
50100a5e | 2097 | |
64ac5f59 JM |
2098 | if (unlikely(!msg_isdata(hdr))) |
2099 | tipc_sk_proto_rcv(sk, &inputq, xmitq); | |
0c3141e9 | 2100 | |
75da2163 JM |
2101 | if (unlikely(grp)) |
2102 | tipc_group_filter_msg(grp, &inputq, xmitq); | |
2103 | ||
64ac5f59 JM |
2104 | /* Validate and add to receive buffer if there is space */ |
2105 | while ((skb = __skb_dequeue(&inputq))) { | |
2106 | hdr = buf_msg(skb); | |
2107 | limit = rcvbuf_limit(sk, skb); | |
2108 | if ((sk_conn && !tipc_sk_filter_connect(tsk, skb)) || | |
75da2163 JM |
2109 | (!sk_conn && msg_connected(hdr)) || |
2110 | (!grp && msg_in_group(hdr))) | |
cda3696d | 2111 | err = TIPC_ERR_NO_PORT; |
64ac5f59 JM |
2112 | else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) |
2113 | err = TIPC_ERR_OVERLOAD; | |
b97bf3fd | 2114 | |
64ac5f59 JM |
2115 | if (unlikely(err)) { |
2116 | tipc_skb_reject(net, err, skb, xmitq); | |
2117 | err = TIPC_OK; | |
2118 | continue; | |
2119 | } | |
2120 | __skb_queue_tail(&sk->sk_receive_queue, skb); | |
2121 | skb_set_owner_r(skb, sk); | |
2122 | sk->sk_data_ready(sk); | |
cda3696d | 2123 | } |
0c3141e9 | 2124 | } |
b97bf3fd | 2125 | |
0c3141e9 | 2126 | /** |
64ac5f59 | 2127 | * tipc_sk_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 2128 | * @sk: socket |
a6ca1094 | 2129 | * @skb: message |
0c3141e9 | 2130 | * |
e3a77561 | 2131 | * Caller must hold socket lock |
0c3141e9 | 2132 | */ |
64ac5f59 | 2133 | static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 2134 | { |
64ac5f59 | 2135 | unsigned int before = sk_rmem_alloc_get(sk); |
f1d048f2 | 2136 | struct sk_buff_head xmitq; |
64ac5f59 | 2137 | unsigned int added; |
0c3141e9 | 2138 | |
f1d048f2 JPM |
2139 | __skb_queue_head_init(&xmitq); |
2140 | ||
64ac5f59 JM |
2141 | tipc_sk_filter_rcv(sk, skb, &xmitq); |
2142 | added = sk_rmem_alloc_get(sk) - before; | |
2143 | atomic_add(added, &tipc_sk(sk)->dupl_rcvcnt); | |
f1d048f2 | 2144 | |
64ac5f59 | 2145 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2146 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
0c3141e9 AS |
2147 | return 0; |
2148 | } | |
2149 | ||
d570d864 | 2150 | /** |
c637c103 JPM |
2151 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
2152 | * inputq and try adding them to socket or backlog queue | |
2153 | * @inputq: list of incoming buffers with potentially different destinations | |
2154 | * @sk: socket where the buffers should be enqueued | |
2155 | * @dport: port number for the socket | |
d570d864 JPM |
2156 | * |
2157 | * Caller must hold socket lock | |
d570d864 | 2158 | */ |
cda3696d | 2159 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 2160 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 2161 | { |
f1d048f2 JPM |
2162 | unsigned long time_limit = jiffies + 2; |
2163 | struct sk_buff *skb; | |
d570d864 JPM |
2164 | unsigned int lim; |
2165 | atomic_t *dcnt; | |
f1d048f2 | 2166 | u32 onode; |
c637c103 JPM |
2167 | |
2168 | while (skb_queue_len(inputq)) { | |
51a00daf | 2169 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
2170 | return; |
2171 | ||
c637c103 JPM |
2172 | skb = tipc_skb_dequeue(inputq, dport); |
2173 | if (unlikely(!skb)) | |
cda3696d JPM |
2174 | return; |
2175 | ||
2176 | /* Add message directly to receive queue if possible */ | |
c637c103 | 2177 | if (!sock_owned_by_user(sk)) { |
64ac5f59 | 2178 | tipc_sk_filter_rcv(sk, skb, xmitq); |
cda3696d | 2179 | continue; |
c637c103 | 2180 | } |
cda3696d JPM |
2181 | |
2182 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 2183 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 2184 | if (!sk->sk_backlog.len) |
c637c103 JPM |
2185 | atomic_set(dcnt, 0); |
2186 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
2187 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
2188 | continue; | |
cda3696d JPM |
2189 | |
2190 | /* Overload => reject message back to sender */ | |
f1d048f2 JPM |
2191 | onode = tipc_own_addr(sock_net(sk)); |
2192 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) | |
2193 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 2194 | break; |
c637c103 | 2195 | } |
d570d864 JPM |
2196 | } |
2197 | ||
0c3141e9 | 2198 | /** |
c637c103 JPM |
2199 | * tipc_sk_rcv - handle a chain of incoming buffers |
2200 | * @inputq: buffer list containing the buffers | |
2201 | * Consumes all buffers in list until inputq is empty | |
2202 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 2203 | */ |
cda3696d | 2204 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 2205 | { |
f1d048f2 | 2206 | struct sk_buff_head xmitq; |
c637c103 | 2207 | u32 dnode, dport = 0; |
9871b27f | 2208 | int err; |
9816f061 | 2209 | struct tipc_sock *tsk; |
9816f061 | 2210 | struct sock *sk; |
cda3696d | 2211 | struct sk_buff *skb; |
9816f061 | 2212 | |
f1d048f2 | 2213 | __skb_queue_head_init(&xmitq); |
c637c103 | 2214 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
2215 | dport = tipc_skb_peek_port(inputq, dport); |
2216 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 2217 | |
c637c103 JPM |
2218 | if (likely(tsk)) { |
2219 | sk = &tsk->sk; | |
2220 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 2221 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 2222 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 2223 | } |
f1d048f2 | 2224 | /* Send pending response/rejected messages, if any */ |
f70d37b7 | 2225 | tipc_node_distr_xmit(sock_net(sk), &xmitq); |
c637c103 | 2226 | sock_put(sk); |
c637c103 | 2227 | continue; |
c637c103 | 2228 | } |
cda3696d JPM |
2229 | /* No destination socket => dequeue skb if still there */ |
2230 | skb = tipc_skb_dequeue(inputq, dport); | |
2231 | if (!skb) | |
2232 | return; | |
2233 | ||
2234 | /* Try secondary lookup if unresolved named message */ | |
2235 | err = TIPC_ERR_NO_PORT; | |
2236 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
2237 | goto xmit; | |
2238 | ||
2239 | /* Prepare for message rejection */ | |
2240 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 2241 | continue; |
e3a77561 | 2242 | xmit: |
cda3696d | 2243 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 2244 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 2245 | } |
b97bf3fd PL |
2246 | } |
2247 | ||
78eb3a53 YX |
2248 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
2249 | { | |
d9dc8b0f | 2250 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 2251 | struct sock *sk = sock->sk; |
78eb3a53 YX |
2252 | int done; |
2253 | ||
2254 | do { | |
2255 | int err = sock_error(sk); | |
2256 | if (err) | |
2257 | return err; | |
2258 | if (!*timeo_p) | |
2259 | return -ETIMEDOUT; | |
2260 | if (signal_pending(current)) | |
2261 | return sock_intr_errno(*timeo_p); | |
2262 | ||
d9dc8b0f | 2263 | add_wait_queue(sk_sleep(sk), &wait); |
99a20889 | 2264 | done = sk_wait_event(sk, timeo_p, |
d9dc8b0f WC |
2265 | sk->sk_state != TIPC_CONNECTING, &wait); |
2266 | remove_wait_queue(sk_sleep(sk), &wait); | |
78eb3a53 YX |
2267 | } while (!done); |
2268 | return 0; | |
2269 | } | |
2270 | ||
b97bf3fd | 2271 | /** |
247f0f3c | 2272 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
2273 | * @sock: socket structure |
2274 | * @dest: socket address for destination port | |
2275 | * @destlen: size of socket address data structure | |
0c3141e9 | 2276 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
2277 | * |
2278 | * Returns 0 on success, errno otherwise | |
2279 | */ | |
247f0f3c YX |
2280 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
2281 | int destlen, int flags) | |
b97bf3fd | 2282 | { |
0c3141e9 | 2283 | struct sock *sk = sock->sk; |
f2f8036e | 2284 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
2285 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
2286 | struct msghdr m = {NULL,}; | |
f2f8036e | 2287 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 2288 | int previous; |
f2f8036e | 2289 | int res = 0; |
b89741a0 | 2290 | |
23998835 JM |
2291 | if (destlen != sizeof(struct sockaddr_tipc)) |
2292 | return -EINVAL; | |
2293 | ||
0c3141e9 AS |
2294 | lock_sock(sk); |
2295 | ||
75da2163 JM |
2296 | if (tsk->group) { |
2297 | res = -EINVAL; | |
2298 | goto exit; | |
2299 | } | |
2300 | ||
23998835 JM |
2301 | if (dst->family == AF_UNSPEC) { |
2302 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); | |
2303 | if (!tipc_sk_type_connectionless(sk)) | |
610600c8 | 2304 | res = -EINVAL; |
0c3141e9 | 2305 | goto exit; |
23998835 JM |
2306 | } else if (dst->family != AF_TIPC) { |
2307 | res = -EINVAL; | |
0c3141e9 | 2308 | } |
23998835 | 2309 | if (dst->addrtype != TIPC_ADDR_ID && dst->addrtype != TIPC_ADDR_NAME) |
0c3141e9 | 2310 | res = -EINVAL; |
23998835 JM |
2311 | if (res) |
2312 | goto exit; | |
2313 | ||
2314 | /* DGRAM/RDM connect(), just save the destaddr */ | |
2315 | if (tipc_sk_type_connectionless(sk)) { | |
2316 | memcpy(&tsk->peer, dest, destlen); | |
0c3141e9 AS |
2317 | goto exit; |
2318 | } | |
2319 | ||
99a20889 | 2320 | previous = sk->sk_state; |
438adcaf PB |
2321 | |
2322 | switch (sk->sk_state) { | |
2323 | case TIPC_OPEN: | |
584d24b3 YX |
2324 | /* Send a 'SYN-' to destination */ |
2325 | m.msg_name = dest; | |
2326 | m.msg_namelen = destlen; | |
2327 | ||
2328 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
2329 | * indicate send_msg() is never blocked. | |
2330 | */ | |
2331 | if (!timeout) | |
2332 | m.msg_flags = MSG_DONTWAIT; | |
2333 | ||
39a0295f | 2334 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
2335 | if ((res < 0) && (res != -EWOULDBLOCK)) |
2336 | goto exit; | |
2337 | ||
99a20889 | 2338 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
2339 | * difference is that return value in non-blocking |
2340 | * case is EINPROGRESS, rather than EALREADY. | |
2341 | */ | |
2342 | res = -EINPROGRESS; | |
99a20889 PB |
2343 | /* fall thru' */ |
2344 | case TIPC_CONNECTING: | |
2345 | if (!timeout) { | |
2346 | if (previous == TIPC_CONNECTING) | |
2347 | res = -EALREADY; | |
78eb3a53 | 2348 | goto exit; |
99a20889 | 2349 | } |
78eb3a53 YX |
2350 | timeout = msecs_to_jiffies(timeout); |
2351 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
2352 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
2353 | break; |
2354 | case TIPC_ESTABLISHED: | |
584d24b3 | 2355 | res = -EISCONN; |
f40acbaf PB |
2356 | break; |
2357 | default: | |
584d24b3 | 2358 | res = -EINVAL; |
f40acbaf | 2359 | } |
99a20889 | 2360 | |
0c3141e9 AS |
2361 | exit: |
2362 | release_sock(sk); | |
b89741a0 | 2363 | return res; |
b97bf3fd PL |
2364 | } |
2365 | ||
c4307285 | 2366 | /** |
247f0f3c | 2367 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
2368 | * @sock: socket structure |
2369 | * @len: (unused) | |
c4307285 | 2370 | * |
b97bf3fd PL |
2371 | * Returns 0 on success, errno otherwise |
2372 | */ | |
247f0f3c | 2373 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 2374 | { |
0c3141e9 AS |
2375 | struct sock *sk = sock->sk; |
2376 | int res; | |
2377 | ||
2378 | lock_sock(sk); | |
0c288c86 | 2379 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 2380 | release_sock(sk); |
0c288c86 | 2381 | |
0c3141e9 | 2382 | return res; |
b97bf3fd PL |
2383 | } |
2384 | ||
6398e23c YX |
2385 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2386 | { | |
2387 | struct sock *sk = sock->sk; | |
2388 | DEFINE_WAIT(wait); | |
2389 | int err; | |
2390 | ||
2391 | /* True wake-one mechanism for incoming connections: only | |
2392 | * one process gets woken up, not the 'whole herd'. | |
2393 | * Since we do not 'race & poll' for established sockets | |
2394 | * anymore, the common case will execute the loop only once. | |
2395 | */ | |
2396 | for (;;) { | |
2397 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2398 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2399 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2400 | release_sock(sk); |
2401 | timeo = schedule_timeout(timeo); | |
2402 | lock_sock(sk); | |
2403 | } | |
2404 | err = 0; | |
2405 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2406 | break; | |
6398e23c YX |
2407 | err = -EAGAIN; |
2408 | if (!timeo) | |
2409 | break; | |
143fe22f EH |
2410 | err = sock_intr_errno(timeo); |
2411 | if (signal_pending(current)) | |
2412 | break; | |
6398e23c YX |
2413 | } |
2414 | finish_wait(sk_sleep(sk), &wait); | |
2415 | return err; | |
2416 | } | |
2417 | ||
c4307285 | 2418 | /** |
247f0f3c | 2419 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2420 | * @sock: listening socket |
2421 | * @newsock: new socket that is to be connected | |
2422 | * @flags: file-related flags associated with socket | |
c4307285 | 2423 | * |
b97bf3fd PL |
2424 | * Returns 0 on success, errno otherwise |
2425 | */ | |
cdfbabfb DH |
2426 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags, |
2427 | bool kern) | |
b97bf3fd | 2428 | { |
0fef8f20 | 2429 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2430 | struct sk_buff *buf; |
301bae56 | 2431 | struct tipc_sock *new_tsock; |
0fef8f20 | 2432 | struct tipc_msg *msg; |
6398e23c | 2433 | long timeo; |
0c3141e9 | 2434 | int res; |
b97bf3fd | 2435 | |
0c3141e9 | 2436 | lock_sock(sk); |
b97bf3fd | 2437 | |
0c288c86 | 2438 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2439 | res = -EINVAL; |
b97bf3fd PL |
2440 | goto exit; |
2441 | } | |
6398e23c YX |
2442 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2443 | res = tipc_wait_for_accept(sock, timeo); | |
2444 | if (res) | |
2445 | goto exit; | |
0c3141e9 AS |
2446 | |
2447 | buf = skb_peek(&sk->sk_receive_queue); | |
2448 | ||
cdfbabfb | 2449 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern); |
0fef8f20 PG |
2450 | if (res) |
2451 | goto exit; | |
fdd75ea8 | 2452 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2453 | |
0fef8f20 | 2454 | new_sk = new_sock->sk; |
301bae56 | 2455 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2456 | msg = buf_msg(buf); |
b97bf3fd | 2457 | |
0fef8f20 PG |
2458 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2459 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2460 | ||
2461 | /* | |
2462 | * Reject any stray messages received by new socket | |
2463 | * before the socket lock was taken (very, very unlikely) | |
2464 | */ | |
2e84c60b | 2465 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2466 | |
2467 | /* Connect new socket to it's peer */ | |
301bae56 | 2468 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2469 | |
301bae56 | 2470 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2471 | if (msg_named(msg)) { |
301bae56 JPM |
2472 | new_tsock->conn_type = msg_nametype(msg); |
2473 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2474 | } |
0fef8f20 PG |
2475 | |
2476 | /* | |
2477 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2478 | * Respond to 'SYN+' by queuing it on new socket. | |
2479 | */ | |
2480 | if (!msg_data_sz(msg)) { | |
2481 | struct msghdr m = {NULL,}; | |
2482 | ||
2e84c60b | 2483 | tsk_advance_rx_queue(sk); |
365ad353 | 2484 | __tipc_sendstream(new_sock, &m, 0); |
0fef8f20 PG |
2485 | } else { |
2486 | __skb_dequeue(&sk->sk_receive_queue); | |
2487 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2488 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2489 | } |
2490 | release_sock(new_sk); | |
b97bf3fd | 2491 | exit: |
0c3141e9 | 2492 | release_sock(sk); |
b97bf3fd PL |
2493 | return res; |
2494 | } | |
2495 | ||
2496 | /** | |
247f0f3c | 2497 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2498 | * @sock: socket structure |
e247a8f5 | 2499 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2500 | * |
2501 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2502 | * |
b97bf3fd PL |
2503 | * Returns 0 on success, errno otherwise |
2504 | */ | |
247f0f3c | 2505 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2506 | { |
0c3141e9 | 2507 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2508 | int res; |
2509 | ||
e247a8f5 AS |
2510 | if (how != SHUT_RDWR) |
2511 | return -EINVAL; | |
b97bf3fd | 2512 | |
0c3141e9 | 2513 | lock_sock(sk); |
b97bf3fd | 2514 | |
6f00089c PB |
2515 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2516 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2517 | |
6f00089c | 2518 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2519 | /* Discard any unreceived messages */ |
57467e56 | 2520 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2521 | |
2522 | /* Wake up anyone sleeping in poll */ | |
2523 | sk->sk_state_change(sk); | |
b97bf3fd | 2524 | res = 0; |
6f00089c | 2525 | } else { |
b97bf3fd PL |
2526 | res = -ENOTCONN; |
2527 | } | |
2528 | ||
0c3141e9 | 2529 | release_sock(sk); |
b97bf3fd PL |
2530 | return res; |
2531 | } | |
2532 | ||
31b102bb | 2533 | static void tipc_sk_timeout(struct timer_list *t) |
57289015 | 2534 | { |
31b102bb KC |
2535 | struct sock *sk = from_timer(sk, t, sk_timer); |
2536 | struct tipc_sock *tsk = tipc_sk(sk); | |
0d5fcebf JM |
2537 | u32 peer_port = tsk_peer_port(tsk); |
2538 | u32 peer_node = tsk_peer_node(tsk); | |
2539 | u32 own_node = tsk_own_node(tsk); | |
2540 | u32 own_port = tsk->portid; | |
0d5fcebf | 2541 | struct net *net = sock_net(sk); |
a6ca1094 | 2542 | struct sk_buff *skb = NULL; |
57289015 | 2543 | |
6c9808ce | 2544 | bh_lock_sock(sk); |
0d5fcebf JM |
2545 | if (!tipc_sk_connected(sk)) |
2546 | goto exit; | |
2547 | ||
2548 | /* Try again later if socket is busy */ | |
2549 | if (sock_owned_by_user(sk)) { | |
2550 | sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20); | |
6c9808ce | 2551 | goto exit; |
57289015 | 2552 | } |
57289015 | 2553 | |
8ea642ee | 2554 | if (tsk->probe_unacked) { |
0d5fcebf JM |
2555 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2556 | tipc_node_remove_conn(net, peer_node, peer_port); | |
2557 | sk->sk_state_change(sk); | |
360aab6b | 2558 | goto exit; |
57289015 | 2559 | } |
0d5fcebf JM |
2560 | /* Send new probe */ |
2561 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0, | |
2562 | peer_node, own_node, peer_port, own_port, | |
2563 | TIPC_OK); | |
8ea642ee | 2564 | tsk->probe_unacked = true; |
0d5fcebf JM |
2565 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV); |
2566 | exit: | |
57289015 | 2567 | bh_unlock_sock(sk); |
a6ca1094 | 2568 | if (skb) |
0d5fcebf | 2569 | tipc_node_xmit_skb(net, skb, peer_node, own_port); |
07f6c4bc | 2570 | sock_put(sk); |
57289015 JPM |
2571 | } |
2572 | ||
301bae56 | 2573 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2574 | struct tipc_name_seq const *seq) |
2575 | { | |
d6fb7e9c PB |
2576 | struct sock *sk = &tsk->sk; |
2577 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2578 | struct publication *publ; |
2579 | u32 key; | |
2580 | ||
d6fb7e9c | 2581 | if (tipc_sk_connected(sk)) |
0fc87aae | 2582 | return -EINVAL; |
07f6c4bc YX |
2583 | key = tsk->portid + tsk->pub_count + 1; |
2584 | if (key == tsk->portid) | |
0fc87aae JPM |
2585 | return -EADDRINUSE; |
2586 | ||
f2f9800d | 2587 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2588 | scope, tsk->portid, key); |
0fc87aae JPM |
2589 | if (unlikely(!publ)) |
2590 | return -EINVAL; | |
2591 | ||
301bae56 JPM |
2592 | list_add(&publ->pport_list, &tsk->publications); |
2593 | tsk->pub_count++; | |
2594 | tsk->published = 1; | |
0fc87aae JPM |
2595 | return 0; |
2596 | } | |
2597 | ||
301bae56 | 2598 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2599 | struct tipc_name_seq const *seq) |
2600 | { | |
f2f9800d | 2601 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2602 | struct publication *publ; |
2603 | struct publication *safe; | |
2604 | int rc = -EINVAL; | |
2605 | ||
301bae56 | 2606 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2607 | if (seq) { |
2608 | if (publ->scope != scope) | |
2609 | continue; | |
2610 | if (publ->type != seq->type) | |
2611 | continue; | |
2612 | if (publ->lower != seq->lower) | |
2613 | continue; | |
2614 | if (publ->upper != seq->upper) | |
2615 | break; | |
f2f9800d | 2616 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2617 | publ->ref, publ->key); |
2618 | rc = 0; | |
2619 | break; | |
2620 | } | |
f2f9800d | 2621 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2622 | publ->ref, publ->key); |
2623 | rc = 0; | |
2624 | } | |
301bae56 JPM |
2625 | if (list_empty(&tsk->publications)) |
2626 | tsk->published = 0; | |
0fc87aae JPM |
2627 | return rc; |
2628 | } | |
2629 | ||
5a9ee0be JPM |
2630 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2631 | * when we go from standalone to network mode. | |
2632 | */ | |
e05b31f4 | 2633 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2634 | { |
e05b31f4 | 2635 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
40f9f439 | 2636 | struct rhashtable_iter iter; |
07f6c4bc | 2637 | struct tipc_sock *tsk; |
5a9ee0be | 2638 | struct tipc_msg *msg; |
5a9ee0be | 2639 | |
40f9f439 HX |
2640 | rhashtable_walk_enter(&tn->sk_rht, &iter); |
2641 | ||
2642 | do { | |
2643 | tsk = ERR_PTR(rhashtable_walk_start(&iter)); | |
6c7e983b BP |
2644 | if (IS_ERR(tsk)) |
2645 | goto walk_stop; | |
40f9f439 HX |
2646 | |
2647 | while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) { | |
07f6c4bc YX |
2648 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
2649 | msg = &tsk->phdr; | |
34747539 YX |
2650 | msg_set_prevnode(msg, tn->own_addr); |
2651 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2652 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2653 | } | |
6c7e983b | 2654 | walk_stop: |
40f9f439 HX |
2655 | rhashtable_walk_stop(&iter); |
2656 | } while (tsk == ERR_PTR(-EAGAIN)); | |
5a9ee0be JPM |
2657 | } |
2658 | ||
e05b31f4 | 2659 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2660 | { |
e05b31f4 | 2661 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2662 | struct tipc_sock *tsk; |
808d90f9 | 2663 | |
07f6c4bc | 2664 | rcu_read_lock(); |
6cca7289 | 2665 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2666 | if (tsk) |
2667 | sock_hold(&tsk->sk); | |
2668 | rcu_read_unlock(); | |
808d90f9 | 2669 | |
07f6c4bc | 2670 | return tsk; |
808d90f9 JPM |
2671 | } |
2672 | ||
07f6c4bc | 2673 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2674 | { |
e05b31f4 YX |
2675 | struct sock *sk = &tsk->sk; |
2676 | struct net *net = sock_net(sk); | |
2677 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2678 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2679 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2680 | |
07f6c4bc YX |
2681 | while (remaining--) { |
2682 | portid++; | |
2683 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2684 | portid = TIPC_MIN_PORT; | |
2685 | tsk->portid = portid; | |
2686 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2687 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2688 | tsk_rht_params)) | |
07f6c4bc YX |
2689 | return 0; |
2690 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2691 | } |
2692 | ||
07f6c4bc | 2693 | return -1; |
808d90f9 JPM |
2694 | } |
2695 | ||
07f6c4bc | 2696 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2697 | { |
07f6c4bc | 2698 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2699 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2700 | |
6cca7289 | 2701 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
41c6d650 | 2702 | WARN_ON(refcount_read(&sk->sk_refcnt) == 1); |
07f6c4bc | 2703 | __sock_put(sk); |
808d90f9 | 2704 | } |
808d90f9 JPM |
2705 | } |
2706 | ||
6cca7289 HX |
2707 | static const struct rhashtable_params tsk_rht_params = { |
2708 | .nelem_hint = 192, | |
2709 | .head_offset = offsetof(struct tipc_sock, node), | |
2710 | .key_offset = offsetof(struct tipc_sock, portid), | |
2711 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2712 | .max_size = 1048576, |
2713 | .min_size = 256, | |
b5e2c150 | 2714 | .automatic_shrinking = true, |
6cca7289 HX |
2715 | }; |
2716 | ||
e05b31f4 | 2717 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2718 | { |
e05b31f4 | 2719 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2720 | |
2721 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2722 | } |
2723 | ||
e05b31f4 | 2724 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2725 | { |
e05b31f4 YX |
2726 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2727 | ||
07f6c4bc YX |
2728 | /* Wait for socket readers to complete */ |
2729 | synchronize_net(); | |
808d90f9 | 2730 | |
e05b31f4 | 2731 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2732 | } |
2733 | ||
75da2163 JM |
2734 | static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq) |
2735 | { | |
2736 | struct net *net = sock_net(&tsk->sk); | |
2737 | u32 domain = addr_domain(net, mreq->scope); | |
2738 | struct tipc_group *grp = tsk->group; | |
2739 | struct tipc_msg *hdr = &tsk->phdr; | |
2740 | struct tipc_name_seq seq; | |
2741 | int rc; | |
2742 | ||
2743 | if (mreq->type < TIPC_RESERVED_TYPES) | |
2744 | return -EACCES; | |
2745 | if (grp) | |
2746 | return -EACCES; | |
2747 | grp = tipc_group_create(net, tsk->portid, mreq); | |
2748 | if (!grp) | |
2749 | return -ENOMEM; | |
2750 | tsk->group = grp; | |
2751 | msg_set_lookup_scope(hdr, mreq->scope); | |
2752 | msg_set_nametype(hdr, mreq->type); | |
2753 | msg_set_dest_droppable(hdr, true); | |
2754 | seq.type = mreq->type; | |
2755 | seq.lower = mreq->instance; | |
2756 | seq.upper = seq.lower; | |
2757 | tipc_nametbl_build_group(net, grp, mreq->type, domain); | |
2758 | rc = tipc_sk_publish(tsk, mreq->scope, &seq); | |
e233df01 | 2759 | if (rc) { |
75da2163 | 2760 | tipc_group_delete(net, grp); |
e233df01 CW |
2761 | tsk->group = NULL; |
2762 | } | |
399574d4 JM |
2763 | |
2764 | /* Eliminate any risk that a broadcast overtakes the sent JOIN */ | |
2765 | tsk->mc_method.rcast = true; | |
2766 | tsk->mc_method.mandatory = true; | |
75da2163 JM |
2767 | return rc; |
2768 | } | |
2769 | ||
2770 | static int tipc_sk_leave(struct tipc_sock *tsk) | |
2771 | { | |
2772 | struct net *net = sock_net(&tsk->sk); | |
2773 | struct tipc_group *grp = tsk->group; | |
2774 | struct tipc_name_seq seq; | |
2775 | int scope; | |
2776 | ||
2777 | if (!grp) | |
2778 | return -EINVAL; | |
2779 | tipc_group_self(grp, &seq, &scope); | |
2780 | tipc_group_delete(net, grp); | |
2781 | tsk->group = NULL; | |
2782 | tipc_sk_withdraw(tsk, scope, &seq); | |
2783 | return 0; | |
2784 | } | |
2785 | ||
b97bf3fd | 2786 | /** |
247f0f3c | 2787 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2788 | * @sock: socket structure |
2789 | * @lvl: option level | |
2790 | * @opt: option identifier | |
2791 | * @ov: pointer to new option value | |
2792 | * @ol: length of option value | |
c4307285 YH |
2793 | * |
2794 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2795 | * (to ease compatibility). |
c4307285 | 2796 | * |
b97bf3fd PL |
2797 | * Returns 0 on success, errno otherwise |
2798 | */ | |
247f0f3c YX |
2799 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2800 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2801 | { |
0c3141e9 | 2802 | struct sock *sk = sock->sk; |
58ed9442 | 2803 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 | 2804 | struct tipc_group_req mreq; |
01fd12bb | 2805 | u32 value = 0; |
a08ef476 | 2806 | int res = 0; |
b97bf3fd | 2807 | |
c4307285 YH |
2808 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2809 | return 0; | |
b97bf3fd PL |
2810 | if (lvl != SOL_TIPC) |
2811 | return -ENOPROTOOPT; | |
01fd12bb JPM |
2812 | |
2813 | switch (opt) { | |
2814 | case TIPC_IMPORTANCE: | |
2815 | case TIPC_SRC_DROPPABLE: | |
2816 | case TIPC_DEST_DROPPABLE: | |
2817 | case TIPC_CONN_TIMEOUT: | |
2818 | if (ol < sizeof(value)) | |
2819 | return -EINVAL; | |
75da2163 JM |
2820 | if (get_user(value, (u32 __user *)ov)) |
2821 | return -EFAULT; | |
2822 | break; | |
2823 | case TIPC_GROUP_JOIN: | |
2824 | if (ol < sizeof(mreq)) | |
2825 | return -EINVAL; | |
2826 | if (copy_from_user(&mreq, ov, sizeof(mreq))) | |
2827 | return -EFAULT; | |
01fd12bb JPM |
2828 | break; |
2829 | default: | |
2830 | if (ov || ol) | |
2831 | return -EINVAL; | |
2832 | } | |
b97bf3fd | 2833 | |
0c3141e9 | 2834 | lock_sock(sk); |
c4307285 | 2835 | |
b97bf3fd PL |
2836 | switch (opt) { |
2837 | case TIPC_IMPORTANCE: | |
301bae56 | 2838 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2839 | break; |
2840 | case TIPC_SRC_DROPPABLE: | |
2841 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2842 | tsk_set_unreliable(tsk, value); |
c4307285 | 2843 | else |
b97bf3fd PL |
2844 | res = -ENOPROTOOPT; |
2845 | break; | |
2846 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2847 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2848 | break; |
2849 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2850 | tipc_sk(sk)->conn_timeout = value; |
b97bf3fd | 2851 | break; |
01fd12bb JPM |
2852 | case TIPC_MCAST_BROADCAST: |
2853 | tsk->mc_method.rcast = false; | |
2854 | tsk->mc_method.mandatory = true; | |
2855 | break; | |
2856 | case TIPC_MCAST_REPLICAST: | |
2857 | tsk->mc_method.rcast = true; | |
2858 | tsk->mc_method.mandatory = true; | |
2859 | break; | |
75da2163 JM |
2860 | case TIPC_GROUP_JOIN: |
2861 | res = tipc_sk_join(tsk, &mreq); | |
2862 | break; | |
2863 | case TIPC_GROUP_LEAVE: | |
2864 | res = tipc_sk_leave(tsk); | |
2865 | break; | |
b97bf3fd PL |
2866 | default: |
2867 | res = -EINVAL; | |
2868 | } | |
2869 | ||
0c3141e9 AS |
2870 | release_sock(sk); |
2871 | ||
b97bf3fd PL |
2872 | return res; |
2873 | } | |
2874 | ||
2875 | /** | |
247f0f3c | 2876 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2877 | * @sock: socket structure |
2878 | * @lvl: option level | |
2879 | * @opt: option identifier | |
2880 | * @ov: receptacle for option value | |
2881 | * @ol: receptacle for length of option value | |
c4307285 YH |
2882 | * |
2883 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2884 | * (to ease compatibility). |
c4307285 | 2885 | * |
b97bf3fd PL |
2886 | * Returns 0 on success, errno otherwise |
2887 | */ | |
247f0f3c YX |
2888 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2889 | char __user *ov, int __user *ol) | |
b97bf3fd | 2890 | { |
0c3141e9 | 2891 | struct sock *sk = sock->sk; |
58ed9442 | 2892 | struct tipc_sock *tsk = tipc_sk(sk); |
75da2163 JM |
2893 | struct tipc_name_seq seq; |
2894 | int len, scope; | |
b97bf3fd | 2895 | u32 value; |
c4307285 | 2896 | int res; |
b97bf3fd | 2897 | |
c4307285 YH |
2898 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2899 | return put_user(0, ol); | |
b97bf3fd PL |
2900 | if (lvl != SOL_TIPC) |
2901 | return -ENOPROTOOPT; | |
2db9983a AS |
2902 | res = get_user(len, ol); |
2903 | if (res) | |
c4307285 | 2904 | return res; |
b97bf3fd | 2905 | |
0c3141e9 | 2906 | lock_sock(sk); |
b97bf3fd PL |
2907 | |
2908 | switch (opt) { | |
2909 | case TIPC_IMPORTANCE: | |
301bae56 | 2910 | value = tsk_importance(tsk); |
b97bf3fd PL |
2911 | break; |
2912 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2913 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2914 | break; |
2915 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2916 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2917 | break; |
2918 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2919 | value = tsk->conn_timeout; |
0c3141e9 | 2920 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2921 | break; |
0e65967e | 2922 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2923 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2924 | break; |
0e65967e | 2925 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2926 | value = skb_queue_len(&sk->sk_receive_queue); |
2927 | break; | |
75da2163 JM |
2928 | case TIPC_GROUP_JOIN: |
2929 | seq.type = 0; | |
2930 | if (tsk->group) | |
2931 | tipc_group_self(tsk->group, &seq, &scope); | |
2932 | value = seq.type; | |
2933 | break; | |
b97bf3fd PL |
2934 | default: |
2935 | res = -EINVAL; | |
2936 | } | |
2937 | ||
0c3141e9 AS |
2938 | release_sock(sk); |
2939 | ||
25860c3b PG |
2940 | if (res) |
2941 | return res; /* "get" failed */ | |
b97bf3fd | 2942 | |
25860c3b PG |
2943 | if (len < sizeof(value)) |
2944 | return -EINVAL; | |
2945 | ||
2946 | if (copy_to_user(ov, &value, sizeof(value))) | |
2947 | return -EFAULT; | |
2948 | ||
2949 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2950 | } |
2951 | ||
f2f9800d | 2952 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2953 | { |
f2f9800d | 2954 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2955 | struct tipc_sioc_ln_req lnr; |
2956 | void __user *argp = (void __user *)arg; | |
2957 | ||
2958 | switch (cmd) { | |
2959 | case SIOCGETLINKNAME: | |
2960 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2961 | return -EFAULT; | |
f2f9800d YX |
2962 | if (!tipc_node_get_linkname(sock_net(sk), |
2963 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2964 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2965 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2966 | return -EFAULT; | |
2967 | return 0; | |
2968 | } | |
2969 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2970 | default: |
2971 | return -ENOIOCTLCMD; | |
2972 | } | |
2973 | } | |
2974 | ||
70b03759 EH |
2975 | static int tipc_socketpair(struct socket *sock1, struct socket *sock2) |
2976 | { | |
2977 | struct tipc_sock *tsk2 = tipc_sk(sock2->sk); | |
2978 | struct tipc_sock *tsk1 = tipc_sk(sock1->sk); | |
66bc1e8d EH |
2979 | u32 onode = tipc_own_addr(sock_net(sock1->sk)); |
2980 | ||
2981 | tsk1->peer.family = AF_TIPC; | |
2982 | tsk1->peer.addrtype = TIPC_ADDR_ID; | |
2983 | tsk1->peer.scope = TIPC_NODE_SCOPE; | |
2984 | tsk1->peer.addr.id.ref = tsk2->portid; | |
2985 | tsk1->peer.addr.id.node = onode; | |
2986 | tsk2->peer.family = AF_TIPC; | |
2987 | tsk2->peer.addrtype = TIPC_ADDR_ID; | |
2988 | tsk2->peer.scope = TIPC_NODE_SCOPE; | |
2989 | tsk2->peer.addr.id.ref = tsk1->portid; | |
2990 | tsk2->peer.addr.id.node = onode; | |
2991 | ||
2992 | tipc_sk_finish_conn(tsk1, tsk2->portid, onode); | |
2993 | tipc_sk_finish_conn(tsk2, tsk1->portid, onode); | |
70b03759 EH |
2994 | return 0; |
2995 | } | |
2996 | ||
ae86b9e3 BH |
2997 | /* Protocol switches for the various types of TIPC sockets */ |
2998 | ||
bca65eae | 2999 | static const struct proto_ops msg_ops = { |
0e65967e | 3000 | .owner = THIS_MODULE, |
b97bf3fd | 3001 | .family = AF_TIPC, |
247f0f3c YX |
3002 | .release = tipc_release, |
3003 | .bind = tipc_bind, | |
3004 | .connect = tipc_connect, | |
66bc1e8d | 3005 | .socketpair = tipc_socketpair, |
245f3d34 | 3006 | .accept = sock_no_accept, |
247f0f3c YX |
3007 | .getname = tipc_getname, |
3008 | .poll = tipc_poll, | |
78acb1f9 | 3009 | .ioctl = tipc_ioctl, |
245f3d34 | 3010 | .listen = sock_no_listen, |
247f0f3c YX |
3011 | .shutdown = tipc_shutdown, |
3012 | .setsockopt = tipc_setsockopt, | |
3013 | .getsockopt = tipc_getsockopt, | |
3014 | .sendmsg = tipc_sendmsg, | |
3015 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3016 | .mmap = sock_no_mmap, |
3017 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3018 | }; |
3019 | ||
bca65eae | 3020 | static const struct proto_ops packet_ops = { |
0e65967e | 3021 | .owner = THIS_MODULE, |
b97bf3fd | 3022 | .family = AF_TIPC, |
247f0f3c YX |
3023 | .release = tipc_release, |
3024 | .bind = tipc_bind, | |
3025 | .connect = tipc_connect, | |
70b03759 | 3026 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3027 | .accept = tipc_accept, |
3028 | .getname = tipc_getname, | |
3029 | .poll = tipc_poll, | |
78acb1f9 | 3030 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3031 | .listen = tipc_listen, |
3032 | .shutdown = tipc_shutdown, | |
3033 | .setsockopt = tipc_setsockopt, | |
3034 | .getsockopt = tipc_getsockopt, | |
3035 | .sendmsg = tipc_send_packet, | |
3036 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
3037 | .mmap = sock_no_mmap, |
3038 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3039 | }; |
3040 | ||
bca65eae | 3041 | static const struct proto_ops stream_ops = { |
0e65967e | 3042 | .owner = THIS_MODULE, |
b97bf3fd | 3043 | .family = AF_TIPC, |
247f0f3c YX |
3044 | .release = tipc_release, |
3045 | .bind = tipc_bind, | |
3046 | .connect = tipc_connect, | |
70b03759 | 3047 | .socketpair = tipc_socketpair, |
247f0f3c YX |
3048 | .accept = tipc_accept, |
3049 | .getname = tipc_getname, | |
3050 | .poll = tipc_poll, | |
78acb1f9 | 3051 | .ioctl = tipc_ioctl, |
247f0f3c YX |
3052 | .listen = tipc_listen, |
3053 | .shutdown = tipc_shutdown, | |
3054 | .setsockopt = tipc_setsockopt, | |
3055 | .getsockopt = tipc_getsockopt, | |
365ad353 | 3056 | .sendmsg = tipc_sendstream, |
ec8a09fb | 3057 | .recvmsg = tipc_recvstream, |
8238745a YH |
3058 | .mmap = sock_no_mmap, |
3059 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
3060 | }; |
3061 | ||
bca65eae | 3062 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 3063 | .owner = THIS_MODULE, |
b97bf3fd | 3064 | .family = AF_TIPC, |
c5fa7b3c | 3065 | .create = tipc_sk_create |
b97bf3fd PL |
3066 | }; |
3067 | ||
3068 | static struct proto tipc_proto = { | |
3069 | .name = "TIPC", | |
3070 | .owner = THIS_MODULE, | |
cc79dd1b YX |
3071 | .obj_size = sizeof(struct tipc_sock), |
3072 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
3073 | }; |
3074 | ||
3075 | /** | |
4323add6 | 3076 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 3077 | * |
b97bf3fd PL |
3078 | * Returns 0 on success, errno otherwise |
3079 | */ | |
4323add6 | 3080 | int tipc_socket_init(void) |
b97bf3fd PL |
3081 | { |
3082 | int res; | |
3083 | ||
c4307285 | 3084 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 3085 | if (res) { |
2cf8aa19 | 3086 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
3087 | goto out; |
3088 | } | |
3089 | ||
3090 | res = sock_register(&tipc_family_ops); | |
3091 | if (res) { | |
2cf8aa19 | 3092 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
3093 | proto_unregister(&tipc_proto); |
3094 | goto out; | |
3095 | } | |
b97bf3fd PL |
3096 | out: |
3097 | return res; | |
3098 | } | |
3099 | ||
3100 | /** | |
4323add6 | 3101 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 3102 | */ |
4323add6 | 3103 | void tipc_socket_stop(void) |
b97bf3fd | 3104 | { |
b97bf3fd PL |
3105 | sock_unregister(tipc_family_ops.family); |
3106 | proto_unregister(&tipc_proto); | |
3107 | } | |
34b78a12 RA |
3108 | |
3109 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 3110 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
3111 | { |
3112 | u32 peer_node; | |
3113 | u32 peer_port; | |
3114 | struct nlattr *nest; | |
3115 | ||
3116 | peer_node = tsk_peer_node(tsk); | |
3117 | peer_port = tsk_peer_port(tsk); | |
3118 | ||
3119 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
3120 | ||
3121 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
3122 | goto msg_full; | |
3123 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
3124 | goto msg_full; | |
3125 | ||
3126 | if (tsk->conn_type != 0) { | |
3127 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
3128 | goto msg_full; | |
3129 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
3130 | goto msg_full; | |
3131 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
3132 | goto msg_full; | |
3133 | } | |
3134 | nla_nest_end(skb, nest); | |
3135 | ||
3136 | return 0; | |
3137 | ||
3138 | msg_full: | |
3139 | nla_nest_cancel(skb, nest); | |
3140 | ||
3141 | return -EMSGSIZE; | |
3142 | } | |
3143 | ||
3144 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3145 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
3146 | struct tipc_sock *tsk) | |
34b78a12 RA |
3147 | { |
3148 | int err; | |
3149 | void *hdr; | |
3150 | struct nlattr *attrs; | |
34747539 YX |
3151 | struct net *net = sock_net(skb->sk); |
3152 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6fb7e9c | 3153 | struct sock *sk = &tsk->sk; |
34b78a12 RA |
3154 | |
3155 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3156 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
3157 | if (!hdr) |
3158 | goto msg_cancel; | |
3159 | ||
3160 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
3161 | if (!attrs) | |
3162 | goto genlmsg_cancel; | |
07f6c4bc | 3163 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 3164 | goto attr_msg_cancel; |
34747539 | 3165 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
3166 | goto attr_msg_cancel; |
3167 | ||
d6fb7e9c | 3168 | if (tipc_sk_connected(sk)) { |
34b78a12 RA |
3169 | err = __tipc_nl_add_sk_con(skb, tsk); |
3170 | if (err) | |
3171 | goto attr_msg_cancel; | |
3172 | } else if (!list_empty(&tsk->publications)) { | |
3173 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
3174 | goto attr_msg_cancel; | |
3175 | } | |
3176 | nla_nest_end(skb, attrs); | |
3177 | genlmsg_end(skb, hdr); | |
3178 | ||
3179 | return 0; | |
3180 | ||
3181 | attr_msg_cancel: | |
3182 | nla_nest_cancel(skb, attrs); | |
3183 | genlmsg_cancel: | |
3184 | genlmsg_cancel(skb, hdr); | |
3185 | msg_cancel: | |
3186 | return -EMSGSIZE; | |
3187 | } | |
3188 | ||
3189 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3190 | { | |
3191 | int err; | |
3192 | struct tipc_sock *tsk; | |
07f6c4bc YX |
3193 | const struct bucket_table *tbl; |
3194 | struct rhash_head *pos; | |
e05b31f4 YX |
3195 | struct net *net = sock_net(skb->sk); |
3196 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
3197 | u32 tbl_id = cb->args[0]; |
3198 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 3199 | |
07f6c4bc | 3200 | rcu_read_lock(); |
e05b31f4 | 3201 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
3202 | for (; tbl_id < tbl->size; tbl_id++) { |
3203 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 3204 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
3205 | if (prev_portid && prev_portid != tsk->portid) { |
3206 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
3207 | continue; | |
3208 | } | |
3209 | ||
07f6c4bc | 3210 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
3211 | if (err) { |
3212 | prev_portid = tsk->portid; | |
3213 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
3214 | goto out; | |
3215 | } | |
3216 | prev_portid = 0; | |
07f6c4bc | 3217 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 3218 | } |
34b78a12 | 3219 | } |
d6e164e3 | 3220 | out: |
07f6c4bc | 3221 | rcu_read_unlock(); |
d6e164e3 RA |
3222 | cb->args[0] = tbl_id; |
3223 | cb->args[1] = prev_portid; | |
34b78a12 RA |
3224 | |
3225 | return skb->len; | |
3226 | } | |
1a1a143d RA |
3227 | |
3228 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3229 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
3230 | struct netlink_callback *cb, | |
3231 | struct publication *publ) | |
1a1a143d RA |
3232 | { |
3233 | void *hdr; | |
3234 | struct nlattr *attrs; | |
3235 | ||
3236 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 3237 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
3238 | if (!hdr) |
3239 | goto msg_cancel; | |
3240 | ||
3241 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
3242 | if (!attrs) | |
3243 | goto genlmsg_cancel; | |
3244 | ||
3245 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
3246 | goto attr_msg_cancel; | |
3247 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
3248 | goto attr_msg_cancel; | |
3249 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
3250 | goto attr_msg_cancel; | |
3251 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
3252 | goto attr_msg_cancel; | |
3253 | ||
3254 | nla_nest_end(skb, attrs); | |
3255 | genlmsg_end(skb, hdr); | |
3256 | ||
3257 | return 0; | |
3258 | ||
3259 | attr_msg_cancel: | |
3260 | nla_nest_cancel(skb, attrs); | |
3261 | genlmsg_cancel: | |
3262 | genlmsg_cancel(skb, hdr); | |
3263 | msg_cancel: | |
3264 | return -EMSGSIZE; | |
3265 | } | |
3266 | ||
3267 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
3268 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
3269 | struct netlink_callback *cb, | |
3270 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
3271 | { |
3272 | int err; | |
3273 | struct publication *p; | |
3274 | ||
3275 | if (*last_publ) { | |
3276 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
3277 | if (p->key == *last_publ) | |
3278 | break; | |
3279 | } | |
3280 | if (p->key != *last_publ) { | |
3281 | /* We never set seq or call nl_dump_check_consistent() | |
3282 | * this means that setting prev_seq here will cause the | |
3283 | * consistence check to fail in the netlink callback | |
3284 | * handler. Resulting in the last NLMSG_DONE message | |
3285 | * having the NLM_F_DUMP_INTR flag set. | |
3286 | */ | |
3287 | cb->prev_seq = 1; | |
3288 | *last_publ = 0; | |
3289 | return -EPIPE; | |
3290 | } | |
3291 | } else { | |
3292 | p = list_first_entry(&tsk->publications, struct publication, | |
3293 | pport_list); | |
3294 | } | |
3295 | ||
3296 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
3297 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
3298 | if (err) { | |
3299 | *last_publ = p->key; | |
3300 | return err; | |
3301 | } | |
3302 | } | |
3303 | *last_publ = 0; | |
3304 | ||
3305 | return 0; | |
3306 | } | |
3307 | ||
3308 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3309 | { | |
3310 | int err; | |
07f6c4bc | 3311 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
3312 | u32 last_publ = cb->args[1]; |
3313 | u32 done = cb->args[2]; | |
e05b31f4 | 3314 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
3315 | struct tipc_sock *tsk; |
3316 | ||
07f6c4bc | 3317 | if (!tsk_portid) { |
1a1a143d RA |
3318 | struct nlattr **attrs; |
3319 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
3320 | ||
3321 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
3322 | if (err) | |
3323 | return err; | |
3324 | ||
45e093ae RA |
3325 | if (!attrs[TIPC_NLA_SOCK]) |
3326 | return -EINVAL; | |
3327 | ||
1a1a143d RA |
3328 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
3329 | attrs[TIPC_NLA_SOCK], | |
fceb6435 | 3330 | tipc_nl_sock_policy, NULL); |
1a1a143d RA |
3331 | if (err) |
3332 | return err; | |
3333 | ||
3334 | if (!sock[TIPC_NLA_SOCK_REF]) | |
3335 | return -EINVAL; | |
3336 | ||
07f6c4bc | 3337 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
3338 | } |
3339 | ||
3340 | if (done) | |
3341 | return 0; | |
3342 | ||
e05b31f4 | 3343 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
3344 | if (!tsk) |
3345 | return -EINVAL; | |
3346 | ||
3347 | lock_sock(&tsk->sk); | |
3348 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
3349 | if (!err) | |
3350 | done = 1; | |
3351 | release_sock(&tsk->sk); | |
07f6c4bc | 3352 | sock_put(&tsk->sk); |
1a1a143d | 3353 | |
07f6c4bc | 3354 | cb->args[0] = tsk_portid; |
1a1a143d RA |
3355 | cb->args[1] = last_publ; |
3356 | cb->args[2] = done; | |
3357 | ||
3358 | return skb->len; | |
3359 | } |