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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
51b9a31c | 4 | * Copyright (c) 2001-2007, 2012-2016, 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> |
b97bf3fd | 38 | #include "core.h" |
e2dafe87 | 39 | #include "name_table.h" |
78acb1f9 | 40 | #include "node.h" |
e2dafe87 | 41 | #include "link.h" |
c637c103 | 42 | #include "name_distr.h" |
2e84c60b | 43 | #include "socket.h" |
a6bf70f7 | 44 | #include "bcast.h" |
49cc66ea | 45 | #include "netlink.h" |
2cf8aa19 | 46 | |
07f6c4bc | 47 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
2f55c437 | 48 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc | 49 | #define TIPC_FWD_MSG 1 |
07f6c4bc YX |
50 | #define TIPC_MAX_PORT 0xffffffff |
51 | #define TIPC_MIN_PORT 1 | |
301bae56 | 52 | |
0c288c86 PB |
53 | enum { |
54 | TIPC_LISTEN = TCP_LISTEN, | |
8ea642ee | 55 | TIPC_ESTABLISHED = TCP_ESTABLISHED, |
438adcaf | 56 | TIPC_OPEN = TCP_CLOSE, |
9fd4b070 | 57 | TIPC_DISCONNECTING = TCP_CLOSE_WAIT, |
99a20889 | 58 | TIPC_CONNECTING = TCP_SYN_SENT, |
0c288c86 PB |
59 | }; |
60 | ||
301bae56 JPM |
61 | /** |
62 | * struct tipc_sock - TIPC socket structure | |
63 | * @sk: socket - interacts with 'port' and with user via the socket API | |
301bae56 JPM |
64 | * @conn_type: TIPC type used when connection was established |
65 | * @conn_instance: TIPC instance used when connection was established | |
66 | * @published: non-zero if port has one or more associated names | |
67 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 68 | * @portid: unique port identity in TIPC socket hash table |
301bae56 | 69 | * @phdr: preformatted message header used when sending messages |
365ad353 | 70 | * #cong_links: list of congested links |
301bae56 | 71 | * @publications: list of publications for port |
365ad353 | 72 | * @blocking_link: address of the congested link we are currently sleeping on |
301bae56 JPM |
73 | * @pub_count: total # of publications port has made during its lifetime |
74 | * @probing_state: | |
301bae56 JPM |
75 | * @conn_timeout: the time we can wait for an unresponded setup request |
76 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
365ad353 | 77 | * @cong_link_cnt: number of congested links |
301bae56 JPM |
78 | * @sent_unacked: # messages sent by socket, and not yet acked by peer |
79 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
aeda16b6 | 80 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc YX |
81 | * @node: hash table node |
82 | * @rcu: rcu struct for tipc_sock | |
301bae56 JPM |
83 | */ |
84 | struct tipc_sock { | |
85 | struct sock sk; | |
301bae56 JPM |
86 | u32 conn_type; |
87 | u32 conn_instance; | |
88 | int published; | |
89 | u32 max_pkt; | |
07f6c4bc | 90 | u32 portid; |
301bae56 | 91 | struct tipc_msg phdr; |
365ad353 | 92 | struct list_head cong_links; |
301bae56 JPM |
93 | struct list_head publications; |
94 | u32 pub_count; | |
301bae56 JPM |
95 | uint conn_timeout; |
96 | atomic_t dupl_rcvcnt; | |
8ea642ee | 97 | bool probe_unacked; |
365ad353 | 98 | u16 cong_link_cnt; |
10724cc7 JPM |
99 | u16 snt_unacked; |
100 | u16 snd_win; | |
60020e18 | 101 | u16 peer_caps; |
10724cc7 JPM |
102 | u16 rcv_unacked; |
103 | u16 rcv_win; | |
aeda16b6 | 104 | struct sockaddr_tipc peer; |
07f6c4bc YX |
105 | struct rhash_head node; |
106 | struct rcu_head rcu; | |
301bae56 | 107 | }; |
b97bf3fd | 108 | |
4f4482dc | 109 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 110 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 111 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 112 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c YX |
113 | static int tipc_release(struct socket *sock); |
114 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
f2f2a96a | 115 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 116 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 117 | struct tipc_name_seq const *seq); |
301bae56 | 118 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 119 | struct tipc_name_seq const *seq); |
e05b31f4 | 120 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
121 | static int tipc_sk_insert(struct tipc_sock *tsk); |
122 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
365ad353 | 123 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz); |
39a0295f | 124 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); |
b97bf3fd | 125 | |
bca65eae FW |
126 | static const struct proto_ops packet_ops; |
127 | static const struct proto_ops stream_ops; | |
128 | static const struct proto_ops msg_ops; | |
b97bf3fd | 129 | static struct proto tipc_proto; |
6cca7289 HX |
130 | static const struct rhashtable_params tsk_rht_params; |
131 | ||
c5898636 JPM |
132 | static u32 tsk_own_node(struct tipc_sock *tsk) |
133 | { | |
134 | return msg_prevnode(&tsk->phdr); | |
135 | } | |
136 | ||
301bae56 | 137 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 138 | { |
301bae56 | 139 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
140 | } |
141 | ||
301bae56 | 142 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 143 | { |
301bae56 | 144 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
145 | } |
146 | ||
301bae56 | 147 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 148 | { |
301bae56 | 149 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
150 | } |
151 | ||
301bae56 | 152 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 153 | { |
301bae56 | 154 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
155 | } |
156 | ||
301bae56 | 157 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 158 | { |
301bae56 | 159 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
160 | } |
161 | ||
301bae56 | 162 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 163 | { |
301bae56 | 164 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
165 | } |
166 | ||
301bae56 | 167 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 168 | { |
301bae56 | 169 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
170 | } |
171 | ||
301bae56 | 172 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
173 | { |
174 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
175 | return -EINVAL; | |
301bae56 | 176 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
177 | return 0; |
178 | } | |
8826cde6 | 179 | |
301bae56 JPM |
180 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
181 | { | |
182 | return container_of(sk, struct tipc_sock, sk); | |
183 | } | |
184 | ||
10724cc7 | 185 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 186 | { |
6998cc6e | 187 | return tsk->snt_unacked > tsk->snd_win; |
10724cc7 JPM |
188 | } |
189 | ||
190 | /* tsk_blocks(): translate a buffer size in bytes to number of | |
191 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
192 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
193 | */ | |
194 | static u16 tsk_adv_blocks(int len) | |
195 | { | |
196 | return len / FLOWCTL_BLK_SZ / 4; | |
197 | } | |
198 | ||
199 | /* tsk_inc(): increment counter for sent or received data | |
200 | * - If block based flow control is not supported by peer we | |
201 | * fall back to message based ditto, incrementing the counter | |
202 | */ | |
203 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
204 | { | |
205 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
206 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
207 | return 1; | |
301bae56 JPM |
208 | } |
209 | ||
0c3141e9 | 210 | /** |
2e84c60b | 211 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
212 | * |
213 | * Caller must hold socket lock | |
b97bf3fd | 214 | */ |
2e84c60b | 215 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 216 | { |
5f6d9123 | 217 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
218 | } |
219 | ||
bcd3ffd4 JPM |
220 | /* tipc_sk_respond() : send response message back to sender |
221 | */ | |
222 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
223 | { | |
224 | u32 selector; | |
225 | u32 dnode; | |
226 | u32 onode = tipc_own_addr(sock_net(sk)); | |
227 | ||
228 | if (!tipc_msg_reverse(onode, &skb, err)) | |
229 | return; | |
230 | ||
231 | dnode = msg_destnode(buf_msg(skb)); | |
232 | selector = msg_origport(buf_msg(skb)); | |
233 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
234 | } | |
235 | ||
b97bf3fd | 236 | /** |
2e84c60b | 237 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
238 | * |
239 | * Caller must hold socket lock | |
b97bf3fd | 240 | */ |
2e84c60b | 241 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 242 | { |
a6ca1094 | 243 | struct sk_buff *skb; |
0c3141e9 | 244 | |
bcd3ffd4 JPM |
245 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
246 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
247 | } |
248 | ||
d6fb7e9c PB |
249 | static bool tipc_sk_connected(struct sock *sk) |
250 | { | |
f40acbaf | 251 | return sk->sk_state == TIPC_ESTABLISHED; |
d6fb7e9c PB |
252 | } |
253 | ||
c752023a PB |
254 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
255 | * @sk: socket | |
256 | * | |
257 | * Returns true if connection less, false otherwise | |
258 | */ | |
259 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
260 | { | |
261 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
262 | } | |
263 | ||
2e84c60b | 264 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
265 | * |
266 | * Handles cases where the node's network address has changed from | |
267 | * the default of <0.0.0> to its configured setting. | |
268 | */ | |
2e84c60b | 269 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 270 | { |
d6fb7e9c PB |
271 | struct sock *sk = &tsk->sk; |
272 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); | |
301bae56 | 273 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
274 | u32 orig_node; |
275 | u32 peer_node; | |
276 | ||
d6fb7e9c | 277 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
278 | return false; |
279 | ||
280 | if (unlikely(msg_origport(msg) != peer_port)) | |
281 | return false; | |
282 | ||
283 | orig_node = msg_orignode(msg); | |
301bae56 | 284 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
285 | |
286 | if (likely(orig_node == peer_node)) | |
287 | return true; | |
288 | ||
34747539 | 289 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
290 | return true; |
291 | ||
34747539 | 292 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
293 | return true; |
294 | ||
295 | return false; | |
296 | } | |
297 | ||
0c288c86 PB |
298 | /* tipc_set_sk_state - set the sk_state of the socket |
299 | * @sk: socket | |
300 | * | |
301 | * Caller must hold socket lock | |
302 | * | |
303 | * Returns 0 on success, errno otherwise | |
304 | */ | |
305 | static int tipc_set_sk_state(struct sock *sk, int state) | |
306 | { | |
438adcaf | 307 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
308 | int res = -EINVAL; |
309 | ||
310 | switch (state) { | |
438adcaf PB |
311 | case TIPC_OPEN: |
312 | res = 0; | |
313 | break; | |
0c288c86 | 314 | case TIPC_LISTEN: |
99a20889 | 315 | case TIPC_CONNECTING: |
438adcaf | 316 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
317 | res = 0; |
318 | break; | |
8ea642ee | 319 | case TIPC_ESTABLISHED: |
99a20889 | 320 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 321 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
322 | res = 0; |
323 | break; | |
9fd4b070 | 324 | case TIPC_DISCONNECTING: |
99a20889 | 325 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
326 | oldsk_state == TIPC_ESTABLISHED) |
327 | res = 0; | |
328 | break; | |
0c288c86 PB |
329 | } |
330 | ||
331 | if (!res) | |
332 | sk->sk_state = state; | |
333 | ||
334 | return res; | |
335 | } | |
336 | ||
8c44e1af JPM |
337 | static int tipc_sk_sock_err(struct socket *sock, long *timeout) |
338 | { | |
339 | struct sock *sk = sock->sk; | |
340 | int err = sock_error(sk); | |
341 | int typ = sock->type; | |
342 | ||
343 | if (err) | |
344 | return err; | |
345 | if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { | |
346 | if (sk->sk_state == TIPC_DISCONNECTING) | |
347 | return -EPIPE; | |
348 | else if (!tipc_sk_connected(sk)) | |
349 | return -ENOTCONN; | |
350 | } | |
351 | if (!*timeout) | |
352 | return -EAGAIN; | |
353 | if (signal_pending(current)) | |
354 | return sock_intr_errno(*timeout); | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | #define tipc_wait_for_cond(sock_, timeout_, condition_) \ | |
360 | ({ \ | |
361 | int rc_ = 0; \ | |
362 | int done_ = 0; \ | |
363 | \ | |
364 | while (!(condition_) && !done_) { \ | |
365 | struct sock *sk_ = sock->sk; \ | |
366 | DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ | |
367 | \ | |
368 | rc_ = tipc_sk_sock_err(sock_, timeout_); \ | |
369 | if (rc_) \ | |
370 | break; \ | |
371 | prepare_to_wait(sk_sleep(sk_), &wait_, \ | |
372 | TASK_INTERRUPTIBLE); \ | |
373 | done_ = sk_wait_event(sk_, timeout_, \ | |
374 | (condition_), &wait_); \ | |
375 | remove_wait_queue(sk_sleep(sk_), &wait_); \ | |
376 | } \ | |
377 | rc_; \ | |
378 | }) | |
379 | ||
b97bf3fd | 380 | /** |
c5fa7b3c | 381 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 382 | * @net: network namespace (must be default network) |
b97bf3fd PL |
383 | * @sock: pre-allocated socket structure |
384 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 385 | * @kern: caused by kernel or by userspace? |
c4307285 | 386 | * |
0c3141e9 AS |
387 | * This routine creates additional data structures used by the TIPC socket, |
388 | * initializes them, and links them together. | |
b97bf3fd PL |
389 | * |
390 | * Returns 0 on success, errno otherwise | |
391 | */ | |
58ed9442 JPM |
392 | static int tipc_sk_create(struct net *net, struct socket *sock, |
393 | int protocol, int kern) | |
b97bf3fd | 394 | { |
c5898636 | 395 | struct tipc_net *tn; |
0c3141e9 | 396 | const struct proto_ops *ops; |
b97bf3fd | 397 | struct sock *sk; |
58ed9442 | 398 | struct tipc_sock *tsk; |
5b8fa7ce | 399 | struct tipc_msg *msg; |
0c3141e9 AS |
400 | |
401 | /* Validate arguments */ | |
b97bf3fd PL |
402 | if (unlikely(protocol != 0)) |
403 | return -EPROTONOSUPPORT; | |
404 | ||
b97bf3fd PL |
405 | switch (sock->type) { |
406 | case SOCK_STREAM: | |
0c3141e9 | 407 | ops = &stream_ops; |
b97bf3fd PL |
408 | break; |
409 | case SOCK_SEQPACKET: | |
0c3141e9 | 410 | ops = &packet_ops; |
b97bf3fd PL |
411 | break; |
412 | case SOCK_DGRAM: | |
b97bf3fd | 413 | case SOCK_RDM: |
0c3141e9 | 414 | ops = &msg_ops; |
b97bf3fd | 415 | break; |
49978651 | 416 | default: |
49978651 | 417 | return -EPROTOTYPE; |
b97bf3fd PL |
418 | } |
419 | ||
0c3141e9 | 420 | /* Allocate socket's protocol area */ |
11aa9c28 | 421 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 422 | if (sk == NULL) |
b97bf3fd | 423 | return -ENOMEM; |
b97bf3fd | 424 | |
58ed9442 | 425 | tsk = tipc_sk(sk); |
301bae56 | 426 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 | 427 | INIT_LIST_HEAD(&tsk->publications); |
365ad353 | 428 | INIT_LIST_HEAD(&tsk->cong_links); |
301bae56 | 429 | msg = &tsk->phdr; |
c5898636 JPM |
430 | tn = net_generic(sock_net(sk), tipc_net_id); |
431 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 432 | NAMED_H_SIZE, 0); |
b97bf3fd | 433 | |
0c3141e9 | 434 | /* Finish initializing socket data structures */ |
0c3141e9 | 435 | sock->ops = ops; |
0c3141e9 | 436 | sock_init_data(sock, sk); |
438adcaf | 437 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 438 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 439 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
440 | return -EINVAL; |
441 | } | |
442 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 443 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
6f00089c | 444 | sk->sk_shutdown = 0; |
4f4482dc | 445 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 446 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
447 | sk->sk_data_ready = tipc_data_ready; |
448 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 449 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc JPM |
450 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
451 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
7ef43eba | 452 | |
10724cc7 JPM |
453 | /* Start out with safe limits until we receive an advertised window */ |
454 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
455 | tsk->rcv_win = tsk->snd_win; | |
456 | ||
c752023a | 457 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 458 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 459 | if (sock->type == SOCK_DGRAM) |
301bae56 | 460 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 461 | } |
438adcaf | 462 | |
b97bf3fd PL |
463 | return 0; |
464 | } | |
465 | ||
07f6c4bc YX |
466 | static void tipc_sk_callback(struct rcu_head *head) |
467 | { | |
468 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
469 | ||
470 | sock_put(&tsk->sk); | |
471 | } | |
472 | ||
6f00089c PB |
473 | /* Caller should hold socket lock for the socket. */ |
474 | static void __tipc_shutdown(struct socket *sock, int error) | |
475 | { | |
476 | struct sock *sk = sock->sk; | |
477 | struct tipc_sock *tsk = tipc_sk(sk); | |
478 | struct net *net = sock_net(sk); | |
365ad353 | 479 | long timeout = CONN_TIMEOUT_DEFAULT; |
6f00089c PB |
480 | u32 dnode = tsk_peer_node(tsk); |
481 | struct sk_buff *skb; | |
482 | ||
365ad353 JPM |
483 | /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */ |
484 | tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt && | |
485 | !tsk_conn_cong(tsk))); | |
486 | ||
6f00089c PB |
487 | /* Reject all unreceived messages, except on an active connection |
488 | * (which disconnects locally & sends a 'FIN+' to peer). | |
489 | */ | |
490 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
491 | if (TIPC_SKB_CB(skb)->bytes_read) { | |
492 | kfree_skb(skb); | |
693c5649 | 493 | continue; |
6f00089c | 494 | } |
693c5649 JPM |
495 | if (!tipc_sk_type_connectionless(sk) && |
496 | sk->sk_state != TIPC_DISCONNECTING) { | |
497 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
498 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
499 | } | |
500 | tipc_sk_respond(sk, skb, error); | |
6f00089c | 501 | } |
693c5649 JPM |
502 | |
503 | if (tipc_sk_type_connectionless(sk)) | |
504 | return; | |
505 | ||
6f00089c PB |
506 | if (sk->sk_state != TIPC_DISCONNECTING) { |
507 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
508 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
509 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
510 | tsk->portid, error); | |
511 | if (skb) | |
512 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
693c5649 JPM |
513 | tipc_node_remove_conn(net, dnode, tsk->portid); |
514 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
6f00089c PB |
515 | } |
516 | } | |
517 | ||
b97bf3fd | 518 | /** |
247f0f3c | 519 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
520 | * @sock: socket to destroy |
521 | * | |
522 | * This routine cleans up any messages that are still queued on the socket. | |
523 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
524 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
525 | * and any others are discarded. (If the first message on a STREAM socket | |
526 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 527 | * |
b97bf3fd PL |
528 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
529 | * are returned or discarded according to the "destination droppable" setting | |
530 | * specified for the message by the sender. | |
531 | * | |
532 | * Returns 0 on success, errno otherwise | |
533 | */ | |
247f0f3c | 534 | static int tipc_release(struct socket *sock) |
b97bf3fd | 535 | { |
b97bf3fd | 536 | struct sock *sk = sock->sk; |
58ed9442 | 537 | struct tipc_sock *tsk; |
b97bf3fd | 538 | |
0c3141e9 AS |
539 | /* |
540 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
541 | * releases a pre-allocated child socket that was never used) | |
542 | */ | |
0c3141e9 | 543 | if (sk == NULL) |
b97bf3fd | 544 | return 0; |
c4307285 | 545 | |
58ed9442 | 546 | tsk = tipc_sk(sk); |
0c3141e9 AS |
547 | lock_sock(sk); |
548 | ||
6f00089c PB |
549 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
550 | sk->sk_shutdown = SHUTDOWN_MASK; | |
301bae56 | 551 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 552 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 553 | tipc_sk_remove(tsk); |
b97bf3fd | 554 | |
0c3141e9 | 555 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 556 | release_sock(sk); |
365ad353 JPM |
557 | u32_list_purge(&tsk->cong_links); |
558 | tsk->cong_link_cnt = 0; | |
07f6c4bc | 559 | call_rcu(&tsk->rcu, tipc_sk_callback); |
0c3141e9 | 560 | sock->sk = NULL; |
b97bf3fd | 561 | |
065d7e39 | 562 | return 0; |
b97bf3fd PL |
563 | } |
564 | ||
565 | /** | |
247f0f3c | 566 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
567 | * @sock: socket structure |
568 | * @uaddr: socket address describing name(s) and desired operation | |
569 | * @uaddr_len: size of socket address data structure | |
c4307285 | 570 | * |
b97bf3fd PL |
571 | * Name and name sequence binding is indicated using a positive scope value; |
572 | * a negative scope value unbinds the specified name. Specifying no name | |
573 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 574 | * |
b97bf3fd | 575 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
576 | * |
577 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
578 | * access any non-constant socket information. | |
b97bf3fd | 579 | */ |
247f0f3c YX |
580 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
581 | int uaddr_len) | |
b97bf3fd | 582 | { |
84602761 | 583 | struct sock *sk = sock->sk; |
b97bf3fd | 584 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 585 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 586 | int res = -EINVAL; |
b97bf3fd | 587 | |
84602761 YX |
588 | lock_sock(sk); |
589 | if (unlikely(!uaddr_len)) { | |
301bae56 | 590 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
591 | goto exit; |
592 | } | |
c4307285 | 593 | |
84602761 YX |
594 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
595 | res = -EINVAL; | |
596 | goto exit; | |
597 | } | |
598 | if (addr->family != AF_TIPC) { | |
599 | res = -EAFNOSUPPORT; | |
600 | goto exit; | |
601 | } | |
b97bf3fd | 602 | |
b97bf3fd PL |
603 | if (addr->addrtype == TIPC_ADDR_NAME) |
604 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
605 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
606 | res = -EAFNOSUPPORT; | |
607 | goto exit; | |
608 | } | |
c4307285 | 609 | |
13a2e898 | 610 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 611 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
612 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
613 | res = -EACCES; | |
614 | goto exit; | |
615 | } | |
c422f1bd | 616 | |
84602761 | 617 | res = (addr->scope > 0) ? |
301bae56 JPM |
618 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
619 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
620 | exit: |
621 | release_sock(sk); | |
622 | return res; | |
b97bf3fd PL |
623 | } |
624 | ||
c4307285 | 625 | /** |
247f0f3c | 626 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
627 | * @sock: socket structure |
628 | * @uaddr: area for returned socket address | |
629 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 630 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 631 | * |
b97bf3fd | 632 | * Returns 0 on success, errno otherwise |
0c3141e9 | 633 | * |
2da59918 AS |
634 | * NOTE: This routine doesn't need to take the socket lock since it only |
635 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 636 | * a completely predictable manner). |
b97bf3fd | 637 | */ |
247f0f3c YX |
638 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
639 | int *uaddr_len, int peer) | |
b97bf3fd | 640 | { |
b97bf3fd | 641 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
642 | struct sock *sk = sock->sk; |
643 | struct tipc_sock *tsk = tipc_sk(sk); | |
34747539 | 644 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 645 | |
88f8a5e3 | 646 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 647 | if (peer) { |
f40acbaf | 648 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 649 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 650 | return -ENOTCONN; |
301bae56 JPM |
651 | addr->addr.id.ref = tsk_peer_port(tsk); |
652 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 653 | } else { |
07f6c4bc | 654 | addr->addr.id.ref = tsk->portid; |
34747539 | 655 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 656 | } |
b97bf3fd PL |
657 | |
658 | *uaddr_len = sizeof(*addr); | |
659 | addr->addrtype = TIPC_ADDR_ID; | |
660 | addr->family = AF_TIPC; | |
661 | addr->scope = 0; | |
b97bf3fd PL |
662 | addr->addr.name.domain = 0; |
663 | ||
0c3141e9 | 664 | return 0; |
b97bf3fd PL |
665 | } |
666 | ||
667 | /** | |
247f0f3c | 668 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
669 | * @file: file structure associated with the socket |
670 | * @sock: socket for which to calculate the poll bits | |
671 | * @wait: ??? | |
672 | * | |
9b674e82 AS |
673 | * Returns pollmask value |
674 | * | |
675 | * COMMENTARY: | |
676 | * It appears that the usual socket locking mechanisms are not useful here | |
677 | * since the pollmask info is potentially out-of-date the moment this routine | |
678 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
679 | * to handle any preventable race conditions, so TIPC will do the same ... | |
680 | * | |
f662c070 AS |
681 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
682 | * imply that the operation will succeed, merely that it should be performed | |
683 | * and will not block. | |
b97bf3fd | 684 | */ |
247f0f3c YX |
685 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
686 | poll_table *wait) | |
b97bf3fd | 687 | { |
9b674e82 | 688 | struct sock *sk = sock->sk; |
58ed9442 | 689 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 690 | u32 mask = 0; |
9b674e82 | 691 | |
f288bef4 | 692 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 693 | |
6f00089c PB |
694 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
695 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; | |
696 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
697 | mask |= POLLHUP; | |
698 | ||
f40acbaf PB |
699 | switch (sk->sk_state) { |
700 | case TIPC_ESTABLISHED: | |
365ad353 | 701 | if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk)) |
f662c070 | 702 | mask |= POLLOUT; |
f40acbaf PB |
703 | /* fall thru' */ |
704 | case TIPC_LISTEN: | |
705 | case TIPC_CONNECTING: | |
f662c070 AS |
706 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
707 | mask |= (POLLIN | POLLRDNORM); | |
f40acbaf PB |
708 | break; |
709 | case TIPC_OPEN: | |
365ad353 | 710 | if (!tsk->cong_link_cnt) |
f40acbaf PB |
711 | mask |= POLLOUT; |
712 | if (tipc_sk_type_connectionless(sk) && | |
713 | (!skb_queue_empty(&sk->sk_receive_queue))) | |
714 | mask |= (POLLIN | POLLRDNORM); | |
715 | break; | |
716 | case TIPC_DISCONNECTING: | |
717 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
718 | break; | |
f662c070 | 719 | } |
9b674e82 AS |
720 | |
721 | return mask; | |
b97bf3fd PL |
722 | } |
723 | ||
0abd8ff2 JPM |
724 | /** |
725 | * tipc_sendmcast - send multicast message | |
726 | * @sock: socket structure | |
727 | * @seq: destination address | |
562640f3 | 728 | * @msg: message to send |
365ad353 JPM |
729 | * @dlen: length of data to send |
730 | * @timeout: timeout to wait for wakeup | |
0abd8ff2 JPM |
731 | * |
732 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
733 | * Returns the number of bytes sent on success, or errno | |
734 | */ | |
735 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
365ad353 | 736 | struct msghdr *msg, size_t dlen, long timeout) |
0abd8ff2 JPM |
737 | { |
738 | struct sock *sk = sock->sk; | |
c5898636 | 739 | struct tipc_sock *tsk = tipc_sk(sk); |
365ad353 | 740 | struct tipc_msg *hdr = &tsk->phdr; |
f2f9800d | 741 | struct net *net = sock_net(sk); |
365ad353 JPM |
742 | int mtu = tipc_bcast_get_mtu(net); |
743 | struct sk_buff_head pkts; | |
0abd8ff2 JPM |
744 | int rc; |
745 | ||
365ad353 JPM |
746 | rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt); |
747 | if (unlikely(rc)) | |
748 | return rc; | |
f214fc40 | 749 | |
365ad353 JPM |
750 | msg_set_type(hdr, TIPC_MCAST_MSG); |
751 | msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE); | |
752 | msg_set_destport(hdr, 0); | |
753 | msg_set_destnode(hdr, 0); | |
754 | msg_set_nametype(hdr, seq->type); | |
755 | msg_set_namelower(hdr, seq->lower); | |
756 | msg_set_nameupper(hdr, seq->upper); | |
757 | msg_set_hdr_sz(hdr, MCAST_H_SIZE); | |
758 | ||
759 | skb_queue_head_init(&pkts); | |
760 | rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts); | |
761 | if (unlikely(rc != dlen)) | |
0abd8ff2 JPM |
762 | return rc; |
763 | ||
365ad353 JPM |
764 | rc = tipc_bcast_xmit(net, &pkts); |
765 | if (unlikely(rc == -ELINKCONG)) { | |
766 | tsk->cong_link_cnt = 1; | |
767 | rc = 0; | |
768 | } | |
769 | ||
770 | return rc ? rc : dlen; | |
0abd8ff2 JPM |
771 | } |
772 | ||
cb1b7280 JPM |
773 | /** |
774 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
775 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
776 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
777 | * | |
778 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 779 | */ |
cb1b7280 JPM |
780 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
781 | struct sk_buff_head *inputq) | |
078bec82 | 782 | { |
cb1b7280 | 783 | struct tipc_msg *msg; |
4d8642d8 | 784 | struct list_head dports; |
3c724acd | 785 | u32 portid; |
078bec82 | 786 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
787 | struct sk_buff_head tmpq; |
788 | uint hsz; | |
789 | struct sk_buff *skb, *_skb; | |
3c724acd | 790 | |
cb1b7280 | 791 | __skb_queue_head_init(&tmpq); |
4d8642d8 | 792 | INIT_LIST_HEAD(&dports); |
078bec82 | 793 | |
cb1b7280 JPM |
794 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
795 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
796 | msg = buf_msg(skb); | |
797 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
798 | ||
799 | if (in_own_node(net, msg_orignode(msg))) | |
800 | scope = TIPC_NODE_SCOPE; | |
801 | ||
802 | /* Create destination port list and message clones: */ | |
803 | tipc_nametbl_mc_translate(net, | |
804 | msg_nametype(msg), msg_namelower(msg), | |
805 | msg_nameupper(msg), scope, &dports); | |
4d8642d8 JPM |
806 | portid = u32_pop(&dports); |
807 | for (; portid; portid = u32_pop(&dports)) { | |
cb1b7280 JPM |
808 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); |
809 | if (_skb) { | |
810 | msg_set_destport(buf_msg(_skb), portid); | |
811 | __skb_queue_tail(&tmpq, _skb); | |
812 | continue; | |
813 | } | |
814 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 815 | } |
cb1b7280 JPM |
816 | /* Append to inputq if not already done by other thread */ |
817 | spin_lock_bh(&inputq->lock); | |
818 | if (skb_peek(arrvq) == skb) { | |
819 | skb_queue_splice_tail_init(&tmpq, inputq); | |
820 | kfree_skb(__skb_dequeue(arrvq)); | |
821 | } | |
822 | spin_unlock_bh(&inputq->lock); | |
823 | __skb_queue_purge(&tmpq); | |
824 | kfree_skb(skb); | |
078bec82 | 825 | } |
cb1b7280 | 826 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
827 | } |
828 | ||
ac0074ee JPM |
829 | /** |
830 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
831 | * @tsk: receiving socket | |
bcd3ffd4 | 832 | * @skb: pointer to message buffer. |
ac0074ee | 833 | */ |
f1d048f2 JPM |
834 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
835 | struct sk_buff_head *xmitq) | |
ac0074ee | 836 | { |
bcd3ffd4 | 837 | struct sock *sk = &tsk->sk; |
f1d048f2 | 838 | u32 onode = tsk_own_node(tsk); |
bcd3ffd4 JPM |
839 | struct tipc_msg *hdr = buf_msg(skb); |
840 | int mtyp = msg_type(hdr); | |
10724cc7 | 841 | bool conn_cong; |
bcd3ffd4 | 842 | |
ac0074ee | 843 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 844 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
845 | goto exit; |
846 | ||
8ea642ee | 847 | tsk->probe_unacked = false; |
ac0074ee | 848 | |
bcd3ffd4 JPM |
849 | if (mtyp == CONN_PROBE) { |
850 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
851 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
852 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
853 | return; |
854 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 855 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
856 | tsk->snt_unacked -= msg_conn_ack(hdr); |
857 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
858 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 859 | if (conn_cong) |
bcd3ffd4 JPM |
860 | sk->sk_write_space(sk); |
861 | } else if (mtyp != CONN_PROBE_REPLY) { | |
862 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 863 | } |
ac0074ee | 864 | exit: |
bcd3ffd4 | 865 | kfree_skb(skb); |
ac0074ee JPM |
866 | } |
867 | ||
b97bf3fd | 868 | /** |
247f0f3c | 869 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
870 | * @sock: socket structure |
871 | * @m: message to send | |
e2dafe87 | 872 | * @dsz: amount of user data to be sent |
c4307285 | 873 | * |
b97bf3fd | 874 | * Message must have an destination specified explicitly. |
c4307285 | 875 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
876 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
877 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 878 | * |
b97bf3fd PL |
879 | * Returns the number of bytes sent on success, or errno otherwise |
880 | */ | |
1b784140 | 881 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 882 | struct msghdr *m, size_t dsz) |
39a0295f YX |
883 | { |
884 | struct sock *sk = sock->sk; | |
885 | int ret; | |
886 | ||
887 | lock_sock(sk); | |
888 | ret = __tipc_sendmsg(sock, m, dsz); | |
889 | release_sock(sk); | |
890 | ||
891 | return ret; | |
892 | } | |
893 | ||
365ad353 | 894 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 895 | { |
0c3141e9 | 896 | struct sock *sk = sock->sk; |
f2f9800d | 897 | struct net *net = sock_net(sk); |
365ad353 JPM |
898 | struct tipc_sock *tsk = tipc_sk(sk); |
899 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); | |
900 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); | |
901 | struct list_head *clinks = &tsk->cong_links; | |
902 | bool syn = !tipc_sk_type_connectionless(sk); | |
903 | struct tipc_msg *hdr = &tsk->phdr; | |
f2f8036e | 904 | struct tipc_name_seq *seq; |
365ad353 JPM |
905 | struct sk_buff_head pkts; |
906 | u32 type, inst, domain; | |
907 | u32 dnode, dport; | |
908 | int mtu, rc; | |
b97bf3fd | 909 | |
365ad353 | 910 | if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE)) |
c29c3f70 | 911 | return -EMSGSIZE; |
365ad353 | 912 | |
f2f8036e | 913 | if (unlikely(!dest)) { |
365ad353 JPM |
914 | dest = &tsk->peer; |
915 | if (!syn || dest->family != AF_TIPC) | |
f2f8036e | 916 | return -EDESTADDRREQ; |
f2f8036e | 917 | } |
365ad353 JPM |
918 | |
919 | if (unlikely(m->msg_namelen < sizeof(*dest))) | |
920 | return -EINVAL; | |
921 | ||
922 | if (unlikely(dest->family != AF_TIPC)) | |
923 | return -EINVAL; | |
924 | ||
925 | if (unlikely(syn)) { | |
0c288c86 | 926 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 927 | return -EPIPE; |
438adcaf | 928 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
929 | return -EISCONN; |
930 | if (tsk->published) | |
931 | return -EOPNOTSUPP; | |
3388007b | 932 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
933 | tsk->conn_type = dest->addr.name.name.type; |
934 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 935 | } |
b97bf3fd | 936 | } |
e2dafe87 | 937 | |
365ad353 JPM |
938 | seq = &dest->addr.nameseq; |
939 | if (dest->addrtype == TIPC_ADDR_MCAST) | |
940 | return tipc_sendmcast(sock, seq, m, dlen, timeout); | |
e2dafe87 | 941 | |
365ad353 JPM |
942 | if (dest->addrtype == TIPC_ADDR_NAME) { |
943 | type = dest->addr.name.name.type; | |
944 | inst = dest->addr.name.name.instance; | |
945 | domain = dest->addr.name.domain; | |
e2dafe87 | 946 | dnode = domain; |
365ad353 JPM |
947 | msg_set_type(hdr, TIPC_NAMED_MSG); |
948 | msg_set_hdr_sz(hdr, NAMED_H_SIZE); | |
949 | msg_set_nametype(hdr, type); | |
950 | msg_set_nameinst(hdr, inst); | |
951 | msg_set_lookup_scope(hdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 952 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
365ad353 JPM |
953 | msg_set_destnode(hdr, dnode); |
954 | msg_set_destport(hdr, dport); | |
39a0295f YX |
955 | if (unlikely(!dport && !dnode)) |
956 | return -EHOSTUNREACH; | |
365ad353 | 957 | |
e2dafe87 JPM |
958 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
959 | dnode = dest->addr.id.node; | |
365ad353 JPM |
960 | msg_set_type(hdr, TIPC_DIRECT_MSG); |
961 | msg_set_lookup_scope(hdr, 0); | |
962 | msg_set_destnode(hdr, dnode); | |
963 | msg_set_destport(hdr, dest->addr.id.ref); | |
964 | msg_set_hdr_sz(hdr, BASIC_H_SIZE); | |
e2dafe87 JPM |
965 | } |
966 | ||
365ad353 JPM |
967 | /* Block or return if destination link is congested */ |
968 | rc = tipc_wait_for_cond(sock, &timeout, !u32_find(clinks, dnode)); | |
969 | if (unlikely(rc)) | |
970 | return rc; | |
971 | ||
972 | skb_queue_head_init(&pkts); | |
f2f9800d | 973 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
365ad353 JPM |
974 | rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts); |
975 | if (unlikely(rc != dlen)) | |
39a0295f | 976 | return rc; |
e2dafe87 | 977 | |
365ad353 JPM |
978 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); |
979 | if (unlikely(rc == -ELINKCONG)) { | |
980 | u32_push(clinks, dnode); | |
981 | tsk->cong_link_cnt++; | |
982 | rc = 0; | |
983 | } | |
e2dafe87 | 984 | |
365ad353 JPM |
985 | if (unlikely(syn && !rc)) |
986 | tipc_set_sk_state(sk, TIPC_CONNECTING); | |
987 | ||
988 | return rc ? rc : dlen; | |
b97bf3fd PL |
989 | } |
990 | ||
c4307285 | 991 | /** |
365ad353 | 992 | * tipc_sendstream - send stream-oriented data |
b97bf3fd | 993 | * @sock: socket structure |
4ccfe5e0 JPM |
994 | * @m: data to send |
995 | * @dsz: total length of data to be transmitted | |
c4307285 | 996 | * |
4ccfe5e0 | 997 | * Used for SOCK_STREAM data. |
c4307285 | 998 | * |
4ccfe5e0 JPM |
999 | * Returns the number of bytes sent on success (or partial success), |
1000 | * or errno if no data sent | |
b97bf3fd | 1001 | */ |
365ad353 | 1002 | static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1003 | { |
1004 | struct sock *sk = sock->sk; | |
1005 | int ret; | |
1006 | ||
1007 | lock_sock(sk); | |
365ad353 | 1008 | ret = __tipc_sendstream(sock, m, dsz); |
39a0295f YX |
1009 | release_sock(sk); |
1010 | ||
1011 | return ret; | |
1012 | } | |
1013 | ||
365ad353 | 1014 | static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen) |
b97bf3fd | 1015 | { |
0c3141e9 | 1016 | struct sock *sk = sock->sk; |
342dfc30 | 1017 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
365ad353 JPM |
1018 | long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
1019 | struct tipc_sock *tsk = tipc_sk(sk); | |
1020 | struct tipc_msg *hdr = &tsk->phdr; | |
1021 | struct net *net = sock_net(sk); | |
1022 | struct sk_buff_head pkts; | |
1023 | u32 dnode = tsk_peer_node(tsk); | |
1024 | int send, sent = 0; | |
1025 | int rc = 0; | |
1d835874 | 1026 | |
365ad353 | 1027 | skb_queue_head_init(&pkts); |
7cf87fa2 | 1028 | |
365ad353 JPM |
1029 | if (unlikely(dlen > INT_MAX)) |
1030 | return -EMSGSIZE; | |
4ccfe5e0 | 1031 | |
365ad353 JPM |
1032 | /* Handle implicit connection setup */ |
1033 | if (unlikely(dest)) { | |
1034 | rc = __tipc_sendmsg(sock, m, dlen); | |
1035 | if (dlen && (dlen == rc)) | |
1036 | tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr)); | |
39a0295f | 1037 | return rc; |
365ad353 | 1038 | } |
f214fc40 | 1039 | |
c4307285 | 1040 | do { |
365ad353 JPM |
1041 | rc = tipc_wait_for_cond(sock, &timeout, |
1042 | (!tsk->cong_link_cnt && | |
8c44e1af JPM |
1043 | !tsk_conn_cong(tsk) && |
1044 | tipc_sk_connected(sk))); | |
365ad353 JPM |
1045 | if (unlikely(rc)) |
1046 | break; | |
1047 | ||
1048 | send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE); | |
1049 | rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts); | |
1050 | if (unlikely(rc != send)) | |
1051 | break; | |
1052 | ||
1053 | rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid); | |
1054 | if (unlikely(rc == -ELINKCONG)) { | |
1055 | tsk->cong_link_cnt = 1; | |
1056 | rc = 0; | |
1057 | } | |
1058 | if (likely(!rc)) { | |
1059 | tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE); | |
1060 | sent += send; | |
1061 | } | |
1062 | } while (sent < dlen && !rc); | |
39a0295f | 1063 | |
365ad353 | 1064 | return rc ? rc : sent; |
b97bf3fd PL |
1065 | } |
1066 | ||
c4307285 | 1067 | /** |
4ccfe5e0 | 1068 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1069 | * @sock: socket structure |
4ccfe5e0 JPM |
1070 | * @m: message to send |
1071 | * @dsz: length of data to be transmitted | |
c4307285 | 1072 | * |
4ccfe5e0 | 1073 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1074 | * |
4ccfe5e0 | 1075 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1076 | */ |
1b784140 | 1077 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1078 | { |
4ccfe5e0 JPM |
1079 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1080 | return -EMSGSIZE; | |
b97bf3fd | 1081 | |
365ad353 | 1082 | return tipc_sendstream(sock, m, dsz); |
b97bf3fd PL |
1083 | } |
1084 | ||
dadebc00 | 1085 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1086 | */ |
301bae56 | 1087 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1088 | u32 peer_node) |
b97bf3fd | 1089 | { |
3721e9c7 YX |
1090 | struct sock *sk = &tsk->sk; |
1091 | struct net *net = sock_net(sk); | |
301bae56 | 1092 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1093 | |
dadebc00 JPM |
1094 | msg_set_destnode(msg, peer_node); |
1095 | msg_set_destport(msg, peer_port); | |
1096 | msg_set_type(msg, TIPC_CONN_MSG); | |
1097 | msg_set_lookup_scope(msg, 0); | |
1098 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1099 | |
360aab6b | 1100 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
8ea642ee | 1101 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d YX |
1102 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1103 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1104 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1105 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1106 | return; | |
1107 | ||
1108 | /* Fall back to message based flow control */ | |
1109 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1110 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1111 | } |
1112 | ||
1113 | /** | |
1114 | * set_orig_addr - capture sender's address for received message | |
1115 | * @m: descriptor for message info | |
1116 | * @msg: received message header | |
c4307285 | 1117 | * |
b97bf3fd PL |
1118 | * Note: Address is not captured if not requested by receiver. |
1119 | */ | |
05790c64 | 1120 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1121 | { |
342dfc30 | 1122 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1123 | |
c4307285 | 1124 | if (addr) { |
b97bf3fd PL |
1125 | addr->family = AF_TIPC; |
1126 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1127 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1128 | addr->addr.id.ref = msg_origport(msg); |
1129 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1130 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1131 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1132 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1133 | } | |
1134 | } | |
1135 | ||
1136 | /** | |
301bae56 | 1137 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1138 | * @m: descriptor for message info |
1139 | * @msg: received message header | |
301bae56 | 1140 | * @tsk: TIPC port associated with message |
c4307285 | 1141 | * |
b97bf3fd | 1142 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1143 | * |
b97bf3fd PL |
1144 | * Returns 0 if successful, otherwise errno |
1145 | */ | |
301bae56 JPM |
1146 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1147 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1148 | { |
1149 | u32 anc_data[3]; | |
1150 | u32 err; | |
1151 | u32 dest_type; | |
3546c750 | 1152 | int has_name; |
b97bf3fd PL |
1153 | int res; |
1154 | ||
1155 | if (likely(m->msg_controllen == 0)) | |
1156 | return 0; | |
1157 | ||
1158 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1159 | err = msg ? msg_errcode(msg) : 0; |
1160 | if (unlikely(err)) { | |
1161 | anc_data[0] = err; | |
1162 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1163 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1164 | if (res) | |
b97bf3fd | 1165 | return res; |
2db9983a AS |
1166 | if (anc_data[1]) { |
1167 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1168 | msg_data(msg)); | |
1169 | if (res) | |
1170 | return res; | |
1171 | } | |
b97bf3fd PL |
1172 | } |
1173 | ||
1174 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1175 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1176 | switch (dest_type) { | |
1177 | case TIPC_NAMED_MSG: | |
3546c750 | 1178 | has_name = 1; |
b97bf3fd PL |
1179 | anc_data[0] = msg_nametype(msg); |
1180 | anc_data[1] = msg_namelower(msg); | |
1181 | anc_data[2] = msg_namelower(msg); | |
1182 | break; | |
1183 | case TIPC_MCAST_MSG: | |
3546c750 | 1184 | has_name = 1; |
b97bf3fd PL |
1185 | anc_data[0] = msg_nametype(msg); |
1186 | anc_data[1] = msg_namelower(msg); | |
1187 | anc_data[2] = msg_nameupper(msg); | |
1188 | break; | |
1189 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1190 | has_name = (tsk->conn_type != 0); |
1191 | anc_data[0] = tsk->conn_type; | |
1192 | anc_data[1] = tsk->conn_instance; | |
1193 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1194 | break; |
1195 | default: | |
3546c750 | 1196 | has_name = 0; |
b97bf3fd | 1197 | } |
2db9983a AS |
1198 | if (has_name) { |
1199 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1200 | if (res) | |
1201 | return res; | |
1202 | } | |
b97bf3fd PL |
1203 | |
1204 | return 0; | |
1205 | } | |
1206 | ||
10724cc7 | 1207 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1208 | { |
d6fb7e9c PB |
1209 | struct sock *sk = &tsk->sk; |
1210 | struct net *net = sock_net(sk); | |
a6ca1094 | 1211 | struct sk_buff *skb = NULL; |
739f5e4e | 1212 | struct tipc_msg *msg; |
301bae56 JPM |
1213 | u32 peer_port = tsk_peer_port(tsk); |
1214 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1215 | |
d6fb7e9c | 1216 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1217 | return; |
c5898636 JPM |
1218 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1219 | dnode, tsk_own_node(tsk), peer_port, | |
1220 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1221 | if (!skb) |
739f5e4e | 1222 | return; |
a6ca1094 | 1223 | msg = buf_msg(skb); |
10724cc7 JPM |
1224 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1225 | tsk->rcv_unacked = 0; | |
1226 | ||
1227 | /* Adjust to and advertize the correct window limit */ | |
1228 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1229 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1230 | msg_set_adv_win(msg, tsk->rcv_win); | |
1231 | } | |
af9b028e | 1232 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1233 | } |
1234 | ||
85d3fc94 | 1235 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1236 | { |
1237 | struct sock *sk = sock->sk; | |
1238 | DEFINE_WAIT(wait); | |
85d3fc94 | 1239 | long timeo = *timeop; |
9bbb4ecc YX |
1240 | int err; |
1241 | ||
1242 | for (;;) { | |
1243 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1244 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1245 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1246 | err = -ENOTCONN; |
1247 | break; | |
1248 | } | |
1249 | release_sock(sk); | |
1250 | timeo = schedule_timeout(timeo); | |
1251 | lock_sock(sk); | |
1252 | } | |
1253 | err = 0; | |
1254 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1255 | break; | |
9bbb4ecc YX |
1256 | err = -EAGAIN; |
1257 | if (!timeo) | |
1258 | break; | |
143fe22f EH |
1259 | err = sock_intr_errno(timeo); |
1260 | if (signal_pending(current)) | |
1261 | break; | |
9bbb4ecc YX |
1262 | } |
1263 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1264 | *timeop = timeo; |
9bbb4ecc YX |
1265 | return err; |
1266 | } | |
1267 | ||
c4307285 | 1268 | /** |
247f0f3c | 1269 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1270 | * @m: descriptor for message info |
1271 | * @buf_len: total size of user buffer area | |
1272 | * @flags: receive flags | |
c4307285 | 1273 | * |
b97bf3fd PL |
1274 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1275 | * If the complete message doesn't fit in user area, truncate it. | |
1276 | * | |
1277 | * Returns size of returned message data, errno otherwise | |
1278 | */ | |
1b784140 YX |
1279 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1280 | int flags) | |
b97bf3fd | 1281 | { |
0c3141e9 | 1282 | struct sock *sk = sock->sk; |
58ed9442 | 1283 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1284 | struct sk_buff *buf; |
1285 | struct tipc_msg *msg; | |
c752023a | 1286 | bool is_connectionless = tipc_sk_type_connectionless(sk); |
9bbb4ecc | 1287 | long timeo; |
b97bf3fd PL |
1288 | unsigned int sz; |
1289 | u32 err; | |
10724cc7 | 1290 | int res, hlen; |
b97bf3fd | 1291 | |
0c3141e9 | 1292 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1293 | if (unlikely(!buf_len)) |
1294 | return -EINVAL; | |
1295 | ||
0c3141e9 | 1296 | lock_sock(sk); |
b97bf3fd | 1297 | |
438adcaf | 1298 | if (!is_connectionless && unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1299 | res = -ENOTCONN; |
b97bf3fd PL |
1300 | goto exit; |
1301 | } | |
1302 | ||
9bbb4ecc | 1303 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1304 | restart: |
b97bf3fd | 1305 | |
0c3141e9 | 1306 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1307 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1308 | if (res) |
1309 | goto exit; | |
b97bf3fd | 1310 | |
0c3141e9 | 1311 | /* Look at first message in receive queue */ |
0c3141e9 | 1312 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1313 | msg = buf_msg(buf); |
1314 | sz = msg_data_sz(msg); | |
10724cc7 | 1315 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1316 | err = msg_errcode(msg); |
1317 | ||
b97bf3fd | 1318 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1319 | if ((!sz) && (!err)) { |
2e84c60b | 1320 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1321 | goto restart; |
1322 | } | |
1323 | ||
1324 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1325 | set_orig_addr(m, msg); |
1326 | ||
1327 | /* Capture ancillary data (optional) */ | |
301bae56 | 1328 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1329 | if (res) |
b97bf3fd PL |
1330 | goto exit; |
1331 | ||
1332 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1333 | if (!err) { |
1334 | if (unlikely(buf_len < sz)) { | |
1335 | sz = buf_len; | |
1336 | m->msg_flags |= MSG_TRUNC; | |
1337 | } | |
10724cc7 | 1338 | res = skb_copy_datagram_msg(buf, hlen, m, sz); |
0232fd0a | 1339 | if (res) |
b97bf3fd | 1340 | goto exit; |
b97bf3fd PL |
1341 | res = sz; |
1342 | } else { | |
c752023a PB |
1343 | if (is_connectionless || err == TIPC_CONN_SHUTDOWN || |
1344 | m->msg_control) | |
b97bf3fd PL |
1345 | res = 0; |
1346 | else | |
1347 | res = -ECONNRESET; | |
1348 | } | |
1349 | ||
10724cc7 JPM |
1350 | if (unlikely(flags & MSG_PEEK)) |
1351 | goto exit; | |
1352 | ||
c752023a | 1353 | if (likely(!is_connectionless)) { |
10724cc7 JPM |
1354 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); |
1355 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1356 | tipc_sk_send_ack(tsk); | |
c4307285 | 1357 | } |
10724cc7 | 1358 | tsk_advance_rx_queue(sk); |
b97bf3fd | 1359 | exit: |
0c3141e9 | 1360 | release_sock(sk); |
b97bf3fd PL |
1361 | return res; |
1362 | } | |
1363 | ||
c4307285 | 1364 | /** |
247f0f3c | 1365 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1366 | * @m: descriptor for message info |
1367 | * @buf_len: total size of user buffer area | |
1368 | * @flags: receive flags | |
c4307285 YH |
1369 | * |
1370 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1371 | * will optionally wait for more; never truncates data. |
1372 | * | |
1373 | * Returns size of returned message data, errno otherwise | |
1374 | */ | |
1b784140 YX |
1375 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1376 | size_t buf_len, int flags) | |
b97bf3fd | 1377 | { |
0c3141e9 | 1378 | struct sock *sk = sock->sk; |
58ed9442 | 1379 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1380 | struct sk_buff *buf; |
1381 | struct tipc_msg *msg; | |
9bbb4ecc | 1382 | long timeo; |
b97bf3fd | 1383 | unsigned int sz; |
ba8aebe9 | 1384 | int target; |
b97bf3fd | 1385 | int sz_copied = 0; |
b97bf3fd | 1386 | u32 err; |
10724cc7 | 1387 | int res = 0, hlen; |
b97bf3fd | 1388 | |
0c3141e9 | 1389 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1390 | if (unlikely(!buf_len)) |
1391 | return -EINVAL; | |
1392 | ||
0c3141e9 | 1393 | lock_sock(sk); |
b97bf3fd | 1394 | |
438adcaf | 1395 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1396 | res = -ENOTCONN; |
b97bf3fd PL |
1397 | goto exit; |
1398 | } | |
1399 | ||
3720d40b | 1400 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1401 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1402 | |
617d3c7a | 1403 | restart: |
0c3141e9 | 1404 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1405 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1406 | if (res) |
1407 | goto exit; | |
b97bf3fd | 1408 | |
0c3141e9 | 1409 | /* Look at first message in receive queue */ |
0c3141e9 | 1410 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1411 | msg = buf_msg(buf); |
1412 | sz = msg_data_sz(msg); | |
10724cc7 | 1413 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1414 | err = msg_errcode(msg); |
1415 | ||
1416 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1417 | if ((!sz) && (!err)) { |
2e84c60b | 1418 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1419 | goto restart; |
1420 | } | |
1421 | ||
1422 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1423 | if (sz_copied == 0) { |
1424 | set_orig_addr(m, msg); | |
301bae56 | 1425 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1426 | if (res) |
b97bf3fd PL |
1427 | goto exit; |
1428 | } | |
1429 | ||
1430 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1431 | if (!err) { |
ba8aebe9 PB |
1432 | u32 offset = TIPC_SKB_CB(buf)->bytes_read; |
1433 | u32 needed; | |
1434 | int sz_to_copy; | |
b97bf3fd | 1435 | |
0232fd0a | 1436 | sz -= offset; |
b97bf3fd | 1437 | needed = (buf_len - sz_copied); |
ba8aebe9 | 1438 | sz_to_copy = min(sz, needed); |
0232fd0a | 1439 | |
10724cc7 | 1440 | res = skb_copy_datagram_msg(buf, hlen + offset, m, sz_to_copy); |
0232fd0a | 1441 | if (res) |
b97bf3fd | 1442 | goto exit; |
0232fd0a | 1443 | |
b97bf3fd PL |
1444 | sz_copied += sz_to_copy; |
1445 | ||
1446 | if (sz_to_copy < sz) { | |
1447 | if (!(flags & MSG_PEEK)) | |
ba8aebe9 PB |
1448 | TIPC_SKB_CB(buf)->bytes_read = |
1449 | offset + sz_to_copy; | |
b97bf3fd PL |
1450 | goto exit; |
1451 | } | |
b97bf3fd PL |
1452 | } else { |
1453 | if (sz_copied != 0) | |
1454 | goto exit; /* can't add error msg to valid data */ | |
1455 | ||
1456 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1457 | res = 0; | |
1458 | else | |
1459 | res = -ECONNRESET; | |
1460 | } | |
1461 | ||
10724cc7 JPM |
1462 | if (unlikely(flags & MSG_PEEK)) |
1463 | goto exit; | |
1464 | ||
1465 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); | |
1466 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1467 | tipc_sk_send_ack(tsk); | |
1468 | tsk_advance_rx_queue(sk); | |
b97bf3fd PL |
1469 | |
1470 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1471 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1472 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1473 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 | 1474 | (!err)) /* and haven't reached a FIN */ |
b97bf3fd PL |
1475 | goto restart; |
1476 | ||
1477 | exit: | |
0c3141e9 | 1478 | release_sock(sk); |
a3b0a5a9 | 1479 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1480 | } |
1481 | ||
f288bef4 YX |
1482 | /** |
1483 | * tipc_write_space - wake up thread if port congestion is released | |
1484 | * @sk: socket | |
1485 | */ | |
1486 | static void tipc_write_space(struct sock *sk) | |
1487 | { | |
1488 | struct socket_wq *wq; | |
1489 | ||
1490 | rcu_read_lock(); | |
1491 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1492 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1493 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1494 | POLLWRNORM | POLLWRBAND); | |
1495 | rcu_read_unlock(); | |
1496 | } | |
1497 | ||
1498 | /** | |
1499 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1500 | * @sk: socket | |
1501 | * @len: the length of messages | |
1502 | */ | |
676d2369 | 1503 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1504 | { |
1505 | struct socket_wq *wq; | |
1506 | ||
1507 | rcu_read_lock(); | |
1508 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1509 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1510 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1511 | POLLRDNORM | POLLRDBAND); | |
1512 | rcu_read_unlock(); | |
1513 | } | |
1514 | ||
f4195d1e YX |
1515 | static void tipc_sock_destruct(struct sock *sk) |
1516 | { | |
1517 | __skb_queue_purge(&sk->sk_receive_queue); | |
1518 | } | |
1519 | ||
7e6c131e YX |
1520 | /** |
1521 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1522 | * @tsk: TIPC socket |
1186adf7 | 1523 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1524 | * |
cda3696d | 1525 | * Returns true if everything ok, false otherwise |
7e6c131e | 1526 | */ |
cda3696d | 1527 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1528 | { |
58ed9442 | 1529 | struct sock *sk = &tsk->sk; |
f2f9800d | 1530 | struct net *net = sock_net(sk); |
cda3696d | 1531 | struct tipc_msg *hdr = buf_msg(skb); |
7e6c131e | 1532 | |
cda3696d JPM |
1533 | if (unlikely(msg_mcast(hdr))) |
1534 | return false; | |
7e6c131e | 1535 | |
99a20889 PB |
1536 | switch (sk->sk_state) { |
1537 | case TIPC_CONNECTING: | |
cda3696d JPM |
1538 | /* Accept only ACK or NACK message */ |
1539 | if (unlikely(!msg_connected(hdr))) | |
1540 | return false; | |
dadebc00 | 1541 | |
cda3696d | 1542 | if (unlikely(msg_errcode(hdr))) { |
9fd4b070 | 1543 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2c8d8518 | 1544 | sk->sk_err = ECONNREFUSED; |
cda3696d | 1545 | return true; |
584d24b3 YX |
1546 | } |
1547 | ||
cda3696d | 1548 | if (unlikely(!msg_isdata(hdr))) { |
9fd4b070 | 1549 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
dadebc00 | 1550 | sk->sk_err = EINVAL; |
cda3696d | 1551 | return true; |
584d24b3 YX |
1552 | } |
1553 | ||
cda3696d JPM |
1554 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1555 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 | 1556 | |
cda3696d JPM |
1557 | /* If 'ACK+' message, add to socket receive queue */ |
1558 | if (msg_data_sz(hdr)) | |
1559 | return true; | |
1560 | ||
1561 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
1562 | if (waitqueue_active(sk_sleep(sk))) | |
1563 | wake_up_interruptible(sk_sleep(sk)); | |
1564 | ||
1565 | /* 'ACK-' message is neither accepted nor rejected: */ | |
1566 | msg_set_dest_droppable(hdr, 1); | |
1567 | return false; | |
cda3696d | 1568 | |
438adcaf | 1569 | case TIPC_OPEN: |
9fd4b070 | 1570 | case TIPC_DISCONNECTING: |
438adcaf PB |
1571 | break; |
1572 | case TIPC_LISTEN: | |
7e6c131e | 1573 | /* Accept only SYN message */ |
cda3696d JPM |
1574 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
1575 | return true; | |
7e6c131e | 1576 | break; |
f40acbaf PB |
1577 | case TIPC_ESTABLISHED: |
1578 | /* Accept only connection-based messages sent by peer */ | |
1579 | if (unlikely(!tsk_peer_msg(tsk, hdr))) | |
1580 | return false; | |
1581 | ||
1582 | if (unlikely(msg_errcode(hdr))) { | |
1583 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1584 | /* Let timer expire on it's own */ | |
1585 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
1586 | tsk->portid); | |
1587 | sk->sk_state_change(sk); | |
1588 | } | |
1589 | return true; | |
7e6c131e | 1590 | default: |
438adcaf | 1591 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 1592 | } |
438adcaf | 1593 | |
cda3696d | 1594 | return false; |
7e6c131e YX |
1595 | } |
1596 | ||
aba79f33 YX |
1597 | /** |
1598 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1599 | * @sk: socket | |
10724cc7 | 1600 | * @skb: message |
aba79f33 | 1601 | * |
10724cc7 JPM |
1602 | * For connection oriented messages, irrespective of importance, |
1603 | * default queue limit is 2 MB. | |
aba79f33 | 1604 | * |
10724cc7 JPM |
1605 | * For connectionless messages, queue limits are based on message |
1606 | * importance as follows: | |
aba79f33 | 1607 | * |
10724cc7 JPM |
1608 | * TIPC_LOW_IMPORTANCE (2 MB) |
1609 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
1610 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
1611 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
1612 | * |
1613 | * Returns overload limit according to corresponding message importance | |
1614 | */ | |
10724cc7 | 1615 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 1616 | { |
10724cc7 JPM |
1617 | struct tipc_sock *tsk = tipc_sk(sk); |
1618 | struct tipc_msg *hdr = buf_msg(skb); | |
1619 | ||
1620 | if (unlikely(!msg_connected(hdr))) | |
1621 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 1622 | |
10724cc7 JPM |
1623 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
1624 | return sk->sk_rcvbuf; | |
0cee6bbe | 1625 | |
10724cc7 | 1626 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
1627 | } |
1628 | ||
c4307285 | 1629 | /** |
0c3141e9 AS |
1630 | * filter_rcv - validate incoming message |
1631 | * @sk: socket | |
cda3696d | 1632 | * @skb: pointer to message. |
c4307285 | 1633 | * |
0c3141e9 AS |
1634 | * Enqueues message on receive queue if acceptable; optionally handles |
1635 | * disconnect indication for a connected socket. | |
1636 | * | |
1186adf7 | 1637 | * Called with socket lock already taken |
c4307285 | 1638 | * |
cda3696d | 1639 | * Returns true if message was added to socket receive queue, otherwise false |
b97bf3fd | 1640 | */ |
f1d048f2 JPM |
1641 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb, |
1642 | struct sk_buff_head *xmitq) | |
b97bf3fd | 1643 | { |
58ed9442 | 1644 | struct tipc_sock *tsk = tipc_sk(sk); |
cda3696d JPM |
1645 | struct tipc_msg *hdr = buf_msg(skb); |
1646 | unsigned int limit = rcvbuf_limit(sk, skb); | |
1647 | int err = TIPC_OK; | |
1648 | int usr = msg_user(hdr); | |
365ad353 | 1649 | u32 onode; |
b97bf3fd | 1650 | |
cda3696d | 1651 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
f1d048f2 | 1652 | tipc_sk_proto_rcv(tsk, skb, xmitq); |
cda3696d | 1653 | return false; |
1186adf7 | 1654 | } |
ec8a2e56 | 1655 | |
cda3696d | 1656 | if (unlikely(usr == SOCK_WAKEUP)) { |
365ad353 | 1657 | onode = msg_orignode(hdr); |
cda3696d | 1658 | kfree_skb(skb); |
365ad353 JPM |
1659 | u32_del(&tsk->cong_links, onode); |
1660 | tsk->cong_link_cnt--; | |
50100a5e | 1661 | sk->sk_write_space(sk); |
cda3696d | 1662 | return false; |
50100a5e JPM |
1663 | } |
1664 | ||
cda3696d JPM |
1665 | /* Drop if illegal message type */ |
1666 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { | |
1667 | kfree_skb(skb); | |
1668 | return false; | |
1669 | } | |
0c3141e9 | 1670 | |
cda3696d | 1671 | /* Reject if wrong message type for current socket state */ |
c752023a | 1672 | if (tipc_sk_type_connectionless(sk)) { |
cda3696d JPM |
1673 | if (msg_connected(hdr)) { |
1674 | err = TIPC_ERR_NO_PORT; | |
1675 | goto reject; | |
1676 | } | |
1677 | } else if (unlikely(!filter_connect(tsk, skb))) { | |
1678 | err = TIPC_ERR_NO_PORT; | |
1679 | goto reject; | |
b97bf3fd PL |
1680 | } |
1681 | ||
1682 | /* Reject message if there isn't room to queue it */ | |
cda3696d JPM |
1683 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
1684 | err = TIPC_ERR_OVERLOAD; | |
1685 | goto reject; | |
1686 | } | |
b97bf3fd | 1687 | |
aba79f33 | 1688 | /* Enqueue message */ |
ba8aebe9 | 1689 | TIPC_SKB_CB(skb)->bytes_read = 0; |
cda3696d JPM |
1690 | __skb_queue_tail(&sk->sk_receive_queue, skb); |
1691 | skb_set_owner_r(skb, sk); | |
0c3141e9 | 1692 | |
676d2369 | 1693 | sk->sk_data_ready(sk); |
cda3696d JPM |
1694 | return true; |
1695 | ||
1696 | reject: | |
f1d048f2 JPM |
1697 | if (tipc_msg_reverse(tsk_own_node(tsk), &skb, err)) |
1698 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1699 | return false; |
0c3141e9 | 1700 | } |
b97bf3fd | 1701 | |
0c3141e9 | 1702 | /** |
4f4482dc | 1703 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1704 | * @sk: socket |
a6ca1094 | 1705 | * @skb: message |
0c3141e9 | 1706 | * |
e3a77561 | 1707 | * Caller must hold socket lock |
0c3141e9 AS |
1708 | * |
1709 | * Returns 0 | |
1710 | */ | |
a6ca1094 | 1711 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1712 | { |
cda3696d | 1713 | unsigned int truesize = skb->truesize; |
f1d048f2 JPM |
1714 | struct sk_buff_head xmitq; |
1715 | u32 dnode, selector; | |
0c3141e9 | 1716 | |
f1d048f2 JPM |
1717 | __skb_queue_head_init(&xmitq); |
1718 | ||
1719 | if (likely(filter_rcv(sk, skb, &xmitq))) { | |
cda3696d | 1720 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); |
f1d048f2 JPM |
1721 | return 0; |
1722 | } | |
1723 | ||
1724 | if (skb_queue_empty(&xmitq)) | |
1725 | return 0; | |
1726 | ||
1727 | /* Send response/rejected message */ | |
1728 | skb = __skb_dequeue(&xmitq); | |
1729 | dnode = msg_destnode(buf_msg(skb)); | |
1730 | selector = msg_origport(buf_msg(skb)); | |
1731 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
0c3141e9 AS |
1732 | return 0; |
1733 | } | |
1734 | ||
d570d864 | 1735 | /** |
c637c103 JPM |
1736 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1737 | * inputq and try adding them to socket or backlog queue | |
1738 | * @inputq: list of incoming buffers with potentially different destinations | |
1739 | * @sk: socket where the buffers should be enqueued | |
1740 | * @dport: port number for the socket | |
d570d864 JPM |
1741 | * |
1742 | * Caller must hold socket lock | |
d570d864 | 1743 | */ |
cda3696d | 1744 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 1745 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 1746 | { |
f1d048f2 JPM |
1747 | unsigned long time_limit = jiffies + 2; |
1748 | struct sk_buff *skb; | |
d570d864 JPM |
1749 | unsigned int lim; |
1750 | atomic_t *dcnt; | |
f1d048f2 | 1751 | u32 onode; |
c637c103 JPM |
1752 | |
1753 | while (skb_queue_len(inputq)) { | |
51a00daf | 1754 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
1755 | return; |
1756 | ||
c637c103 JPM |
1757 | skb = tipc_skb_dequeue(inputq, dport); |
1758 | if (unlikely(!skb)) | |
cda3696d JPM |
1759 | return; |
1760 | ||
1761 | /* Add message directly to receive queue if possible */ | |
c637c103 | 1762 | if (!sock_owned_by_user(sk)) { |
f1d048f2 | 1763 | filter_rcv(sk, skb, xmitq); |
cda3696d | 1764 | continue; |
c637c103 | 1765 | } |
cda3696d JPM |
1766 | |
1767 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 1768 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 1769 | if (!sk->sk_backlog.len) |
c637c103 JPM |
1770 | atomic_set(dcnt, 0); |
1771 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1772 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1773 | continue; | |
cda3696d JPM |
1774 | |
1775 | /* Overload => reject message back to sender */ | |
f1d048f2 JPM |
1776 | onode = tipc_own_addr(sock_net(sk)); |
1777 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) | |
1778 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1779 | break; |
c637c103 | 1780 | } |
d570d864 JPM |
1781 | } |
1782 | ||
0c3141e9 | 1783 | /** |
c637c103 JPM |
1784 | * tipc_sk_rcv - handle a chain of incoming buffers |
1785 | * @inputq: buffer list containing the buffers | |
1786 | * Consumes all buffers in list until inputq is empty | |
1787 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 1788 | */ |
cda3696d | 1789 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1790 | { |
f1d048f2 | 1791 | struct sk_buff_head xmitq; |
c637c103 | 1792 | u32 dnode, dport = 0; |
9871b27f | 1793 | int err; |
9816f061 | 1794 | struct tipc_sock *tsk; |
9816f061 | 1795 | struct sock *sk; |
cda3696d | 1796 | struct sk_buff *skb; |
9816f061 | 1797 | |
f1d048f2 | 1798 | __skb_queue_head_init(&xmitq); |
c637c103 | 1799 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
1800 | dport = tipc_skb_peek_port(inputq, dport); |
1801 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 1802 | |
c637c103 JPM |
1803 | if (likely(tsk)) { |
1804 | sk = &tsk->sk; | |
1805 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 1806 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 1807 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 1808 | } |
f1d048f2 JPM |
1809 | /* Send pending response/rejected messages, if any */ |
1810 | while ((skb = __skb_dequeue(&xmitq))) { | |
1811 | dnode = msg_destnode(buf_msg(skb)); | |
1812 | tipc_node_xmit_skb(net, skb, dnode, dport); | |
1813 | } | |
c637c103 | 1814 | sock_put(sk); |
c637c103 | 1815 | continue; |
c637c103 | 1816 | } |
cda3696d JPM |
1817 | |
1818 | /* No destination socket => dequeue skb if still there */ | |
1819 | skb = tipc_skb_dequeue(inputq, dport); | |
1820 | if (!skb) | |
1821 | return; | |
1822 | ||
1823 | /* Try secondary lookup if unresolved named message */ | |
1824 | err = TIPC_ERR_NO_PORT; | |
1825 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
1826 | goto xmit; | |
1827 | ||
1828 | /* Prepare for message rejection */ | |
1829 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 1830 | continue; |
e3a77561 | 1831 | xmit: |
cda3696d | 1832 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 1833 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 1834 | } |
b97bf3fd PL |
1835 | } |
1836 | ||
78eb3a53 YX |
1837 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1838 | { | |
d9dc8b0f | 1839 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 1840 | struct sock *sk = sock->sk; |
78eb3a53 YX |
1841 | int done; |
1842 | ||
1843 | do { | |
1844 | int err = sock_error(sk); | |
1845 | if (err) | |
1846 | return err; | |
1847 | if (!*timeo_p) | |
1848 | return -ETIMEDOUT; | |
1849 | if (signal_pending(current)) | |
1850 | return sock_intr_errno(*timeo_p); | |
1851 | ||
d9dc8b0f | 1852 | add_wait_queue(sk_sleep(sk), &wait); |
99a20889 | 1853 | done = sk_wait_event(sk, timeo_p, |
d9dc8b0f WC |
1854 | sk->sk_state != TIPC_CONNECTING, &wait); |
1855 | remove_wait_queue(sk_sleep(sk), &wait); | |
78eb3a53 YX |
1856 | } while (!done); |
1857 | return 0; | |
1858 | } | |
1859 | ||
b97bf3fd | 1860 | /** |
247f0f3c | 1861 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1862 | * @sock: socket structure |
1863 | * @dest: socket address for destination port | |
1864 | * @destlen: size of socket address data structure | |
0c3141e9 | 1865 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1866 | * |
1867 | * Returns 0 on success, errno otherwise | |
1868 | */ | |
247f0f3c YX |
1869 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1870 | int destlen, int flags) | |
b97bf3fd | 1871 | { |
0c3141e9 | 1872 | struct sock *sk = sock->sk; |
f2f8036e | 1873 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1874 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1875 | struct msghdr m = {NULL,}; | |
f2f8036e | 1876 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 1877 | int previous; |
f2f8036e | 1878 | int res = 0; |
b89741a0 | 1879 | |
0c3141e9 AS |
1880 | lock_sock(sk); |
1881 | ||
f2f8036e | 1882 | /* DGRAM/RDM connect(), just save the destaddr */ |
c752023a | 1883 | if (tipc_sk_type_connectionless(sk)) { |
f2f8036e | 1884 | if (dst->family == AF_UNSPEC) { |
aeda16b6 | 1885 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); |
610600c8 SL |
1886 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1887 | res = -EINVAL; | |
f2f8036e | 1888 | } else { |
aeda16b6 | 1889 | memcpy(&tsk->peer, dest, destlen); |
f2f8036e | 1890 | } |
0c3141e9 AS |
1891 | goto exit; |
1892 | } | |
b89741a0 | 1893 | |
b89741a0 AS |
1894 | /* |
1895 | * Reject connection attempt using multicast address | |
1896 | * | |
1897 | * Note: send_msg() validates the rest of the address fields, | |
1898 | * so there's no need to do it here | |
1899 | */ | |
0c3141e9 AS |
1900 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1901 | res = -EINVAL; | |
1902 | goto exit; | |
1903 | } | |
1904 | ||
99a20889 | 1905 | previous = sk->sk_state; |
438adcaf PB |
1906 | |
1907 | switch (sk->sk_state) { | |
1908 | case TIPC_OPEN: | |
584d24b3 YX |
1909 | /* Send a 'SYN-' to destination */ |
1910 | m.msg_name = dest; | |
1911 | m.msg_namelen = destlen; | |
1912 | ||
1913 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1914 | * indicate send_msg() is never blocked. | |
1915 | */ | |
1916 | if (!timeout) | |
1917 | m.msg_flags = MSG_DONTWAIT; | |
1918 | ||
39a0295f | 1919 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1920 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1921 | goto exit; | |
1922 | ||
99a20889 | 1923 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
1924 | * difference is that return value in non-blocking |
1925 | * case is EINPROGRESS, rather than EALREADY. | |
1926 | */ | |
1927 | res = -EINPROGRESS; | |
99a20889 PB |
1928 | /* fall thru' */ |
1929 | case TIPC_CONNECTING: | |
1930 | if (!timeout) { | |
1931 | if (previous == TIPC_CONNECTING) | |
1932 | res = -EALREADY; | |
78eb3a53 | 1933 | goto exit; |
99a20889 | 1934 | } |
78eb3a53 YX |
1935 | timeout = msecs_to_jiffies(timeout); |
1936 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1937 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
1938 | break; |
1939 | case TIPC_ESTABLISHED: | |
584d24b3 | 1940 | res = -EISCONN; |
f40acbaf PB |
1941 | break; |
1942 | default: | |
584d24b3 | 1943 | res = -EINVAL; |
f40acbaf | 1944 | } |
99a20889 | 1945 | |
0c3141e9 AS |
1946 | exit: |
1947 | release_sock(sk); | |
b89741a0 | 1948 | return res; |
b97bf3fd PL |
1949 | } |
1950 | ||
c4307285 | 1951 | /** |
247f0f3c | 1952 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1953 | * @sock: socket structure |
1954 | * @len: (unused) | |
c4307285 | 1955 | * |
b97bf3fd PL |
1956 | * Returns 0 on success, errno otherwise |
1957 | */ | |
247f0f3c | 1958 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1959 | { |
0c3141e9 AS |
1960 | struct sock *sk = sock->sk; |
1961 | int res; | |
1962 | ||
1963 | lock_sock(sk); | |
0c288c86 | 1964 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 1965 | release_sock(sk); |
0c288c86 | 1966 | |
0c3141e9 | 1967 | return res; |
b97bf3fd PL |
1968 | } |
1969 | ||
6398e23c YX |
1970 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1971 | { | |
1972 | struct sock *sk = sock->sk; | |
1973 | DEFINE_WAIT(wait); | |
1974 | int err; | |
1975 | ||
1976 | /* True wake-one mechanism for incoming connections: only | |
1977 | * one process gets woken up, not the 'whole herd'. | |
1978 | * Since we do not 'race & poll' for established sockets | |
1979 | * anymore, the common case will execute the loop only once. | |
1980 | */ | |
1981 | for (;;) { | |
1982 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1983 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1984 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1985 | release_sock(sk); |
1986 | timeo = schedule_timeout(timeo); | |
1987 | lock_sock(sk); | |
1988 | } | |
1989 | err = 0; | |
1990 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1991 | break; | |
6398e23c YX |
1992 | err = -EAGAIN; |
1993 | if (!timeo) | |
1994 | break; | |
143fe22f EH |
1995 | err = sock_intr_errno(timeo); |
1996 | if (signal_pending(current)) | |
1997 | break; | |
6398e23c YX |
1998 | } |
1999 | finish_wait(sk_sleep(sk), &wait); | |
2000 | return err; | |
2001 | } | |
2002 | ||
c4307285 | 2003 | /** |
247f0f3c | 2004 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2005 | * @sock: listening socket |
2006 | * @newsock: new socket that is to be connected | |
2007 | * @flags: file-related flags associated with socket | |
c4307285 | 2008 | * |
b97bf3fd PL |
2009 | * Returns 0 on success, errno otherwise |
2010 | */ | |
247f0f3c | 2011 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 2012 | { |
0fef8f20 | 2013 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2014 | struct sk_buff *buf; |
301bae56 | 2015 | struct tipc_sock *new_tsock; |
0fef8f20 | 2016 | struct tipc_msg *msg; |
6398e23c | 2017 | long timeo; |
0c3141e9 | 2018 | int res; |
b97bf3fd | 2019 | |
0c3141e9 | 2020 | lock_sock(sk); |
b97bf3fd | 2021 | |
0c288c86 | 2022 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2023 | res = -EINVAL; |
b97bf3fd PL |
2024 | goto exit; |
2025 | } | |
6398e23c YX |
2026 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2027 | res = tipc_wait_for_accept(sock, timeo); | |
2028 | if (res) | |
2029 | goto exit; | |
0c3141e9 AS |
2030 | |
2031 | buf = skb_peek(&sk->sk_receive_queue); | |
2032 | ||
cb5da847 | 2033 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 0); |
0fef8f20 PG |
2034 | if (res) |
2035 | goto exit; | |
fdd75ea8 | 2036 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2037 | |
0fef8f20 | 2038 | new_sk = new_sock->sk; |
301bae56 | 2039 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2040 | msg = buf_msg(buf); |
b97bf3fd | 2041 | |
0fef8f20 PG |
2042 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2043 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2044 | ||
2045 | /* | |
2046 | * Reject any stray messages received by new socket | |
2047 | * before the socket lock was taken (very, very unlikely) | |
2048 | */ | |
2e84c60b | 2049 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2050 | |
2051 | /* Connect new socket to it's peer */ | |
301bae56 | 2052 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2053 | |
301bae56 | 2054 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2055 | if (msg_named(msg)) { |
301bae56 JPM |
2056 | new_tsock->conn_type = msg_nametype(msg); |
2057 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2058 | } |
0fef8f20 PG |
2059 | |
2060 | /* | |
2061 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2062 | * Respond to 'SYN+' by queuing it on new socket. | |
2063 | */ | |
2064 | if (!msg_data_sz(msg)) { | |
2065 | struct msghdr m = {NULL,}; | |
2066 | ||
2e84c60b | 2067 | tsk_advance_rx_queue(sk); |
365ad353 | 2068 | __tipc_sendstream(new_sock, &m, 0); |
0fef8f20 PG |
2069 | } else { |
2070 | __skb_dequeue(&sk->sk_receive_queue); | |
2071 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2072 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2073 | } |
2074 | release_sock(new_sk); | |
b97bf3fd | 2075 | exit: |
0c3141e9 | 2076 | release_sock(sk); |
b97bf3fd PL |
2077 | return res; |
2078 | } | |
2079 | ||
2080 | /** | |
247f0f3c | 2081 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2082 | * @sock: socket structure |
e247a8f5 | 2083 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2084 | * |
2085 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2086 | * |
b97bf3fd PL |
2087 | * Returns 0 on success, errno otherwise |
2088 | */ | |
247f0f3c | 2089 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2090 | { |
0c3141e9 | 2091 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2092 | int res; |
2093 | ||
e247a8f5 AS |
2094 | if (how != SHUT_RDWR) |
2095 | return -EINVAL; | |
b97bf3fd | 2096 | |
0c3141e9 | 2097 | lock_sock(sk); |
b97bf3fd | 2098 | |
6f00089c PB |
2099 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2100 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2101 | |
6f00089c | 2102 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2103 | /* Discard any unreceived messages */ |
57467e56 | 2104 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2105 | |
2106 | /* Wake up anyone sleeping in poll */ | |
2107 | sk->sk_state_change(sk); | |
b97bf3fd | 2108 | res = 0; |
6f00089c | 2109 | } else { |
b97bf3fd PL |
2110 | res = -ENOTCONN; |
2111 | } | |
2112 | ||
0c3141e9 | 2113 | release_sock(sk); |
b97bf3fd PL |
2114 | return res; |
2115 | } | |
2116 | ||
f2f2a96a | 2117 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2118 | { |
f2f2a96a YX |
2119 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2120 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2121 | struct sk_buff *skb = NULL; |
57289015 | 2122 | u32 peer_port, peer_node; |
c5898636 | 2123 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2124 | |
6c9808ce | 2125 | bh_lock_sock(sk); |
d6fb7e9c | 2126 | if (!tipc_sk_connected(sk)) { |
6c9808ce JPM |
2127 | bh_unlock_sock(sk); |
2128 | goto exit; | |
57289015 | 2129 | } |
301bae56 JPM |
2130 | peer_port = tsk_peer_port(tsk); |
2131 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2132 | |
8ea642ee | 2133 | if (tsk->probe_unacked) { |
b3be5e3e | 2134 | if (!sock_owned_by_user(sk)) { |
9fd4b070 | 2135 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
b3be5e3e EH |
2136 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), |
2137 | tsk_peer_port(tsk)); | |
2138 | sk->sk_state_change(sk); | |
2139 | } else { | |
2140 | /* Try again later */ | |
2141 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2142 | } | |
2143 | ||
360aab6b PB |
2144 | bh_unlock_sock(sk); |
2145 | goto exit; | |
57289015 | 2146 | } |
360aab6b PB |
2147 | |
2148 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, | |
2149 | INT_H_SIZE, 0, peer_node, own_node, | |
2150 | peer_port, tsk->portid, TIPC_OK); | |
8ea642ee | 2151 | tsk->probe_unacked = true; |
360aab6b | 2152 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
57289015 | 2153 | bh_unlock_sock(sk); |
a6ca1094 | 2154 | if (skb) |
af9b028e | 2155 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2156 | exit: |
07f6c4bc | 2157 | sock_put(sk); |
57289015 JPM |
2158 | } |
2159 | ||
301bae56 | 2160 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2161 | struct tipc_name_seq const *seq) |
2162 | { | |
d6fb7e9c PB |
2163 | struct sock *sk = &tsk->sk; |
2164 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2165 | struct publication *publ; |
2166 | u32 key; | |
2167 | ||
d6fb7e9c | 2168 | if (tipc_sk_connected(sk)) |
0fc87aae | 2169 | return -EINVAL; |
07f6c4bc YX |
2170 | key = tsk->portid + tsk->pub_count + 1; |
2171 | if (key == tsk->portid) | |
0fc87aae JPM |
2172 | return -EADDRINUSE; |
2173 | ||
f2f9800d | 2174 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2175 | scope, tsk->portid, key); |
0fc87aae JPM |
2176 | if (unlikely(!publ)) |
2177 | return -EINVAL; | |
2178 | ||
301bae56 JPM |
2179 | list_add(&publ->pport_list, &tsk->publications); |
2180 | tsk->pub_count++; | |
2181 | tsk->published = 1; | |
0fc87aae JPM |
2182 | return 0; |
2183 | } | |
2184 | ||
301bae56 | 2185 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2186 | struct tipc_name_seq const *seq) |
2187 | { | |
f2f9800d | 2188 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2189 | struct publication *publ; |
2190 | struct publication *safe; | |
2191 | int rc = -EINVAL; | |
2192 | ||
301bae56 | 2193 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2194 | if (seq) { |
2195 | if (publ->scope != scope) | |
2196 | continue; | |
2197 | if (publ->type != seq->type) | |
2198 | continue; | |
2199 | if (publ->lower != seq->lower) | |
2200 | continue; | |
2201 | if (publ->upper != seq->upper) | |
2202 | break; | |
f2f9800d | 2203 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2204 | publ->ref, publ->key); |
2205 | rc = 0; | |
2206 | break; | |
2207 | } | |
f2f9800d | 2208 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2209 | publ->ref, publ->key); |
2210 | rc = 0; | |
2211 | } | |
301bae56 JPM |
2212 | if (list_empty(&tsk->publications)) |
2213 | tsk->published = 0; | |
0fc87aae JPM |
2214 | return rc; |
2215 | } | |
2216 | ||
5a9ee0be JPM |
2217 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2218 | * when we go from standalone to network mode. | |
2219 | */ | |
e05b31f4 | 2220 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2221 | { |
e05b31f4 | 2222 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2223 | const struct bucket_table *tbl; |
2224 | struct rhash_head *pos; | |
2225 | struct tipc_sock *tsk; | |
5a9ee0be | 2226 | struct tipc_msg *msg; |
07f6c4bc | 2227 | int i; |
5a9ee0be | 2228 | |
07f6c4bc | 2229 | rcu_read_lock(); |
e05b31f4 | 2230 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2231 | for (i = 0; i < tbl->size; i++) { |
2232 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2233 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2234 | msg = &tsk->phdr; | |
34747539 YX |
2235 | msg_set_prevnode(msg, tn->own_addr); |
2236 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2237 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2238 | } | |
5a9ee0be | 2239 | } |
07f6c4bc | 2240 | rcu_read_unlock(); |
5a9ee0be JPM |
2241 | } |
2242 | ||
e05b31f4 | 2243 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2244 | { |
e05b31f4 | 2245 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2246 | struct tipc_sock *tsk; |
808d90f9 | 2247 | |
07f6c4bc | 2248 | rcu_read_lock(); |
6cca7289 | 2249 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2250 | if (tsk) |
2251 | sock_hold(&tsk->sk); | |
2252 | rcu_read_unlock(); | |
808d90f9 | 2253 | |
07f6c4bc | 2254 | return tsk; |
808d90f9 JPM |
2255 | } |
2256 | ||
07f6c4bc | 2257 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2258 | { |
e05b31f4 YX |
2259 | struct sock *sk = &tsk->sk; |
2260 | struct net *net = sock_net(sk); | |
2261 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2262 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2263 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2264 | |
07f6c4bc YX |
2265 | while (remaining--) { |
2266 | portid++; | |
2267 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2268 | portid = TIPC_MIN_PORT; | |
2269 | tsk->portid = portid; | |
2270 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2271 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2272 | tsk_rht_params)) | |
07f6c4bc YX |
2273 | return 0; |
2274 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2275 | } |
2276 | ||
07f6c4bc | 2277 | return -1; |
808d90f9 JPM |
2278 | } |
2279 | ||
07f6c4bc | 2280 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2281 | { |
07f6c4bc | 2282 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2283 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2284 | |
6cca7289 | 2285 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2286 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2287 | __sock_put(sk); | |
808d90f9 | 2288 | } |
808d90f9 JPM |
2289 | } |
2290 | ||
6cca7289 HX |
2291 | static const struct rhashtable_params tsk_rht_params = { |
2292 | .nelem_hint = 192, | |
2293 | .head_offset = offsetof(struct tipc_sock, node), | |
2294 | .key_offset = offsetof(struct tipc_sock, portid), | |
2295 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2296 | .max_size = 1048576, |
2297 | .min_size = 256, | |
b5e2c150 | 2298 | .automatic_shrinking = true, |
6cca7289 HX |
2299 | }; |
2300 | ||
e05b31f4 | 2301 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2302 | { |
e05b31f4 | 2303 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2304 | |
2305 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2306 | } |
2307 | ||
e05b31f4 | 2308 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2309 | { |
e05b31f4 YX |
2310 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2311 | ||
07f6c4bc YX |
2312 | /* Wait for socket readers to complete */ |
2313 | synchronize_net(); | |
808d90f9 | 2314 | |
e05b31f4 | 2315 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2316 | } |
2317 | ||
b97bf3fd | 2318 | /** |
247f0f3c | 2319 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2320 | * @sock: socket structure |
2321 | * @lvl: option level | |
2322 | * @opt: option identifier | |
2323 | * @ov: pointer to new option value | |
2324 | * @ol: length of option value | |
c4307285 YH |
2325 | * |
2326 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2327 | * (to ease compatibility). |
c4307285 | 2328 | * |
b97bf3fd PL |
2329 | * Returns 0 on success, errno otherwise |
2330 | */ | |
247f0f3c YX |
2331 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2332 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2333 | { |
0c3141e9 | 2334 | struct sock *sk = sock->sk; |
58ed9442 | 2335 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2336 | u32 value; |
2337 | int res; | |
2338 | ||
c4307285 YH |
2339 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2340 | return 0; | |
b97bf3fd PL |
2341 | if (lvl != SOL_TIPC) |
2342 | return -ENOPROTOOPT; | |
2343 | if (ol < sizeof(value)) | |
2344 | return -EINVAL; | |
2db9983a AS |
2345 | res = get_user(value, (u32 __user *)ov); |
2346 | if (res) | |
b97bf3fd PL |
2347 | return res; |
2348 | ||
0c3141e9 | 2349 | lock_sock(sk); |
c4307285 | 2350 | |
b97bf3fd PL |
2351 | switch (opt) { |
2352 | case TIPC_IMPORTANCE: | |
301bae56 | 2353 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2354 | break; |
2355 | case TIPC_SRC_DROPPABLE: | |
2356 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2357 | tsk_set_unreliable(tsk, value); |
c4307285 | 2358 | else |
b97bf3fd PL |
2359 | res = -ENOPROTOOPT; |
2360 | break; | |
2361 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2362 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2363 | break; |
2364 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2365 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2366 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2367 | break; |
2368 | default: | |
2369 | res = -EINVAL; | |
2370 | } | |
2371 | ||
0c3141e9 AS |
2372 | release_sock(sk); |
2373 | ||
b97bf3fd PL |
2374 | return res; |
2375 | } | |
2376 | ||
2377 | /** | |
247f0f3c | 2378 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2379 | * @sock: socket structure |
2380 | * @lvl: option level | |
2381 | * @opt: option identifier | |
2382 | * @ov: receptacle for option value | |
2383 | * @ol: receptacle for length of option value | |
c4307285 YH |
2384 | * |
2385 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2386 | * (to ease compatibility). |
c4307285 | 2387 | * |
b97bf3fd PL |
2388 | * Returns 0 on success, errno otherwise |
2389 | */ | |
247f0f3c YX |
2390 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2391 | char __user *ov, int __user *ol) | |
b97bf3fd | 2392 | { |
0c3141e9 | 2393 | struct sock *sk = sock->sk; |
58ed9442 | 2394 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2395 | int len; |
b97bf3fd | 2396 | u32 value; |
c4307285 | 2397 | int res; |
b97bf3fd | 2398 | |
c4307285 YH |
2399 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2400 | return put_user(0, ol); | |
b97bf3fd PL |
2401 | if (lvl != SOL_TIPC) |
2402 | return -ENOPROTOOPT; | |
2db9983a AS |
2403 | res = get_user(len, ol); |
2404 | if (res) | |
c4307285 | 2405 | return res; |
b97bf3fd | 2406 | |
0c3141e9 | 2407 | lock_sock(sk); |
b97bf3fd PL |
2408 | |
2409 | switch (opt) { | |
2410 | case TIPC_IMPORTANCE: | |
301bae56 | 2411 | value = tsk_importance(tsk); |
b97bf3fd PL |
2412 | break; |
2413 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2414 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2415 | break; |
2416 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2417 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2418 | break; |
2419 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2420 | value = tsk->conn_timeout; |
0c3141e9 | 2421 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2422 | break; |
0e65967e | 2423 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2424 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2425 | break; |
0e65967e | 2426 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2427 | value = skb_queue_len(&sk->sk_receive_queue); |
2428 | break; | |
b97bf3fd PL |
2429 | default: |
2430 | res = -EINVAL; | |
2431 | } | |
2432 | ||
0c3141e9 AS |
2433 | release_sock(sk); |
2434 | ||
25860c3b PG |
2435 | if (res) |
2436 | return res; /* "get" failed */ | |
b97bf3fd | 2437 | |
25860c3b PG |
2438 | if (len < sizeof(value)) |
2439 | return -EINVAL; | |
2440 | ||
2441 | if (copy_to_user(ov, &value, sizeof(value))) | |
2442 | return -EFAULT; | |
2443 | ||
2444 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2445 | } |
2446 | ||
f2f9800d | 2447 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2448 | { |
f2f9800d | 2449 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2450 | struct tipc_sioc_ln_req lnr; |
2451 | void __user *argp = (void __user *)arg; | |
2452 | ||
2453 | switch (cmd) { | |
2454 | case SIOCGETLINKNAME: | |
2455 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2456 | return -EFAULT; | |
f2f9800d YX |
2457 | if (!tipc_node_get_linkname(sock_net(sk), |
2458 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2459 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2460 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2461 | return -EFAULT; | |
2462 | return 0; | |
2463 | } | |
2464 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2465 | default: |
2466 | return -ENOIOCTLCMD; | |
2467 | } | |
2468 | } | |
2469 | ||
ae86b9e3 BH |
2470 | /* Protocol switches for the various types of TIPC sockets */ |
2471 | ||
bca65eae | 2472 | static const struct proto_ops msg_ops = { |
0e65967e | 2473 | .owner = THIS_MODULE, |
b97bf3fd | 2474 | .family = AF_TIPC, |
247f0f3c YX |
2475 | .release = tipc_release, |
2476 | .bind = tipc_bind, | |
2477 | .connect = tipc_connect, | |
5eee6a6d | 2478 | .socketpair = sock_no_socketpair, |
245f3d34 | 2479 | .accept = sock_no_accept, |
247f0f3c YX |
2480 | .getname = tipc_getname, |
2481 | .poll = tipc_poll, | |
78acb1f9 | 2482 | .ioctl = tipc_ioctl, |
245f3d34 | 2483 | .listen = sock_no_listen, |
247f0f3c YX |
2484 | .shutdown = tipc_shutdown, |
2485 | .setsockopt = tipc_setsockopt, | |
2486 | .getsockopt = tipc_getsockopt, | |
2487 | .sendmsg = tipc_sendmsg, | |
2488 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2489 | .mmap = sock_no_mmap, |
2490 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2491 | }; |
2492 | ||
bca65eae | 2493 | static const struct proto_ops packet_ops = { |
0e65967e | 2494 | .owner = THIS_MODULE, |
b97bf3fd | 2495 | .family = AF_TIPC, |
247f0f3c YX |
2496 | .release = tipc_release, |
2497 | .bind = tipc_bind, | |
2498 | .connect = tipc_connect, | |
5eee6a6d | 2499 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2500 | .accept = tipc_accept, |
2501 | .getname = tipc_getname, | |
2502 | .poll = tipc_poll, | |
78acb1f9 | 2503 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2504 | .listen = tipc_listen, |
2505 | .shutdown = tipc_shutdown, | |
2506 | .setsockopt = tipc_setsockopt, | |
2507 | .getsockopt = tipc_getsockopt, | |
2508 | .sendmsg = tipc_send_packet, | |
2509 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2510 | .mmap = sock_no_mmap, |
2511 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2512 | }; |
2513 | ||
bca65eae | 2514 | static const struct proto_ops stream_ops = { |
0e65967e | 2515 | .owner = THIS_MODULE, |
b97bf3fd | 2516 | .family = AF_TIPC, |
247f0f3c YX |
2517 | .release = tipc_release, |
2518 | .bind = tipc_bind, | |
2519 | .connect = tipc_connect, | |
5eee6a6d | 2520 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2521 | .accept = tipc_accept, |
2522 | .getname = tipc_getname, | |
2523 | .poll = tipc_poll, | |
78acb1f9 | 2524 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2525 | .listen = tipc_listen, |
2526 | .shutdown = tipc_shutdown, | |
2527 | .setsockopt = tipc_setsockopt, | |
2528 | .getsockopt = tipc_getsockopt, | |
365ad353 | 2529 | .sendmsg = tipc_sendstream, |
247f0f3c | 2530 | .recvmsg = tipc_recv_stream, |
8238745a YH |
2531 | .mmap = sock_no_mmap, |
2532 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2533 | }; |
2534 | ||
bca65eae | 2535 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2536 | .owner = THIS_MODULE, |
b97bf3fd | 2537 | .family = AF_TIPC, |
c5fa7b3c | 2538 | .create = tipc_sk_create |
b97bf3fd PL |
2539 | }; |
2540 | ||
2541 | static struct proto tipc_proto = { | |
2542 | .name = "TIPC", | |
2543 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2544 | .obj_size = sizeof(struct tipc_sock), |
2545 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2546 | }; |
2547 | ||
2548 | /** | |
4323add6 | 2549 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2550 | * |
b97bf3fd PL |
2551 | * Returns 0 on success, errno otherwise |
2552 | */ | |
4323add6 | 2553 | int tipc_socket_init(void) |
b97bf3fd PL |
2554 | { |
2555 | int res; | |
2556 | ||
c4307285 | 2557 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2558 | if (res) { |
2cf8aa19 | 2559 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2560 | goto out; |
2561 | } | |
2562 | ||
2563 | res = sock_register(&tipc_family_ops); | |
2564 | if (res) { | |
2cf8aa19 | 2565 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2566 | proto_unregister(&tipc_proto); |
2567 | goto out; | |
2568 | } | |
b97bf3fd PL |
2569 | out: |
2570 | return res; | |
2571 | } | |
2572 | ||
2573 | /** | |
4323add6 | 2574 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2575 | */ |
4323add6 | 2576 | void tipc_socket_stop(void) |
b97bf3fd | 2577 | { |
b97bf3fd PL |
2578 | sock_unregister(tipc_family_ops.family); |
2579 | proto_unregister(&tipc_proto); | |
2580 | } | |
34b78a12 RA |
2581 | |
2582 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2583 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2584 | { |
2585 | u32 peer_node; | |
2586 | u32 peer_port; | |
2587 | struct nlattr *nest; | |
2588 | ||
2589 | peer_node = tsk_peer_node(tsk); | |
2590 | peer_port = tsk_peer_port(tsk); | |
2591 | ||
2592 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2593 | ||
2594 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2595 | goto msg_full; | |
2596 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2597 | goto msg_full; | |
2598 | ||
2599 | if (tsk->conn_type != 0) { | |
2600 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2601 | goto msg_full; | |
2602 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2603 | goto msg_full; | |
2604 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2605 | goto msg_full; | |
2606 | } | |
2607 | nla_nest_end(skb, nest); | |
2608 | ||
2609 | return 0; | |
2610 | ||
2611 | msg_full: | |
2612 | nla_nest_cancel(skb, nest); | |
2613 | ||
2614 | return -EMSGSIZE; | |
2615 | } | |
2616 | ||
2617 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2618 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2619 | struct tipc_sock *tsk) | |
34b78a12 RA |
2620 | { |
2621 | int err; | |
2622 | void *hdr; | |
2623 | struct nlattr *attrs; | |
34747539 YX |
2624 | struct net *net = sock_net(skb->sk); |
2625 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6fb7e9c | 2626 | struct sock *sk = &tsk->sk; |
34b78a12 RA |
2627 | |
2628 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2629 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2630 | if (!hdr) |
2631 | goto msg_cancel; | |
2632 | ||
2633 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2634 | if (!attrs) | |
2635 | goto genlmsg_cancel; | |
07f6c4bc | 2636 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2637 | goto attr_msg_cancel; |
34747539 | 2638 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2639 | goto attr_msg_cancel; |
2640 | ||
d6fb7e9c | 2641 | if (tipc_sk_connected(sk)) { |
34b78a12 RA |
2642 | err = __tipc_nl_add_sk_con(skb, tsk); |
2643 | if (err) | |
2644 | goto attr_msg_cancel; | |
2645 | } else if (!list_empty(&tsk->publications)) { | |
2646 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2647 | goto attr_msg_cancel; | |
2648 | } | |
2649 | nla_nest_end(skb, attrs); | |
2650 | genlmsg_end(skb, hdr); | |
2651 | ||
2652 | return 0; | |
2653 | ||
2654 | attr_msg_cancel: | |
2655 | nla_nest_cancel(skb, attrs); | |
2656 | genlmsg_cancel: | |
2657 | genlmsg_cancel(skb, hdr); | |
2658 | msg_cancel: | |
2659 | return -EMSGSIZE; | |
2660 | } | |
2661 | ||
2662 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2663 | { | |
2664 | int err; | |
2665 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2666 | const struct bucket_table *tbl; |
2667 | struct rhash_head *pos; | |
e05b31f4 YX |
2668 | struct net *net = sock_net(skb->sk); |
2669 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2670 | u32 tbl_id = cb->args[0]; |
2671 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2672 | |
07f6c4bc | 2673 | rcu_read_lock(); |
e05b31f4 | 2674 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2675 | for (; tbl_id < tbl->size; tbl_id++) { |
2676 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2677 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2678 | if (prev_portid && prev_portid != tsk->portid) { |
2679 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2680 | continue; | |
2681 | } | |
2682 | ||
07f6c4bc | 2683 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2684 | if (err) { |
2685 | prev_portid = tsk->portid; | |
2686 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2687 | goto out; | |
2688 | } | |
2689 | prev_portid = 0; | |
07f6c4bc | 2690 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2691 | } |
34b78a12 | 2692 | } |
d6e164e3 | 2693 | out: |
07f6c4bc | 2694 | rcu_read_unlock(); |
d6e164e3 RA |
2695 | cb->args[0] = tbl_id; |
2696 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2697 | |
2698 | return skb->len; | |
2699 | } | |
1a1a143d RA |
2700 | |
2701 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2702 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2703 | struct netlink_callback *cb, | |
2704 | struct publication *publ) | |
1a1a143d RA |
2705 | { |
2706 | void *hdr; | |
2707 | struct nlattr *attrs; | |
2708 | ||
2709 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2710 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2711 | if (!hdr) |
2712 | goto msg_cancel; | |
2713 | ||
2714 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2715 | if (!attrs) | |
2716 | goto genlmsg_cancel; | |
2717 | ||
2718 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2719 | goto attr_msg_cancel; | |
2720 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2721 | goto attr_msg_cancel; | |
2722 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2723 | goto attr_msg_cancel; | |
2724 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2725 | goto attr_msg_cancel; | |
2726 | ||
2727 | nla_nest_end(skb, attrs); | |
2728 | genlmsg_end(skb, hdr); | |
2729 | ||
2730 | return 0; | |
2731 | ||
2732 | attr_msg_cancel: | |
2733 | nla_nest_cancel(skb, attrs); | |
2734 | genlmsg_cancel: | |
2735 | genlmsg_cancel(skb, hdr); | |
2736 | msg_cancel: | |
2737 | return -EMSGSIZE; | |
2738 | } | |
2739 | ||
2740 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2741 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2742 | struct netlink_callback *cb, | |
2743 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2744 | { |
2745 | int err; | |
2746 | struct publication *p; | |
2747 | ||
2748 | if (*last_publ) { | |
2749 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2750 | if (p->key == *last_publ) | |
2751 | break; | |
2752 | } | |
2753 | if (p->key != *last_publ) { | |
2754 | /* We never set seq or call nl_dump_check_consistent() | |
2755 | * this means that setting prev_seq here will cause the | |
2756 | * consistence check to fail in the netlink callback | |
2757 | * handler. Resulting in the last NLMSG_DONE message | |
2758 | * having the NLM_F_DUMP_INTR flag set. | |
2759 | */ | |
2760 | cb->prev_seq = 1; | |
2761 | *last_publ = 0; | |
2762 | return -EPIPE; | |
2763 | } | |
2764 | } else { | |
2765 | p = list_first_entry(&tsk->publications, struct publication, | |
2766 | pport_list); | |
2767 | } | |
2768 | ||
2769 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2770 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2771 | if (err) { | |
2772 | *last_publ = p->key; | |
2773 | return err; | |
2774 | } | |
2775 | } | |
2776 | *last_publ = 0; | |
2777 | ||
2778 | return 0; | |
2779 | } | |
2780 | ||
2781 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2782 | { | |
2783 | int err; | |
07f6c4bc | 2784 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2785 | u32 last_publ = cb->args[1]; |
2786 | u32 done = cb->args[2]; | |
e05b31f4 | 2787 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2788 | struct tipc_sock *tsk; |
2789 | ||
07f6c4bc | 2790 | if (!tsk_portid) { |
1a1a143d RA |
2791 | struct nlattr **attrs; |
2792 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2793 | ||
2794 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2795 | if (err) | |
2796 | return err; | |
2797 | ||
45e093ae RA |
2798 | if (!attrs[TIPC_NLA_SOCK]) |
2799 | return -EINVAL; | |
2800 | ||
1a1a143d RA |
2801 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
2802 | attrs[TIPC_NLA_SOCK], | |
2803 | tipc_nl_sock_policy); | |
2804 | if (err) | |
2805 | return err; | |
2806 | ||
2807 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2808 | return -EINVAL; | |
2809 | ||
07f6c4bc | 2810 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2811 | } |
2812 | ||
2813 | if (done) | |
2814 | return 0; | |
2815 | ||
e05b31f4 | 2816 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2817 | if (!tsk) |
2818 | return -EINVAL; | |
2819 | ||
2820 | lock_sock(&tsk->sk); | |
2821 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2822 | if (!err) | |
2823 | done = 1; | |
2824 | release_sock(&tsk->sk); | |
07f6c4bc | 2825 | sock_put(&tsk->sk); |
1a1a143d | 2826 | |
07f6c4bc | 2827 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2828 | cb->args[1] = last_publ; |
2829 | cb->args[2] = done; | |
2830 | ||
2831 | return skb->len; | |
2832 | } |