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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 |
301bae56 JPM |
70 | * @publications: list of publications for port |
71 | * @pub_count: total # of publications port has made during its lifetime | |
72 | * @probing_state: | |
301bae56 JPM |
73 | * @conn_timeout: the time we can wait for an unresponded setup request |
74 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
75 | * @link_cong: non-zero if owner must sleep because of link congestion | |
76 | * @sent_unacked: # messages sent by socket, and not yet acked by peer | |
77 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
aeda16b6 | 78 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc YX |
79 | * @node: hash table node |
80 | * @rcu: rcu struct for tipc_sock | |
301bae56 JPM |
81 | */ |
82 | struct tipc_sock { | |
83 | struct sock sk; | |
301bae56 JPM |
84 | u32 conn_type; |
85 | u32 conn_instance; | |
86 | int published; | |
87 | u32 max_pkt; | |
07f6c4bc | 88 | u32 portid; |
301bae56 JPM |
89 | struct tipc_msg phdr; |
90 | struct list_head sock_list; | |
91 | struct list_head publications; | |
92 | u32 pub_count; | |
301bae56 JPM |
93 | uint conn_timeout; |
94 | atomic_t dupl_rcvcnt; | |
8ea642ee | 95 | bool probe_unacked; |
301bae56 | 96 | bool link_cong; |
10724cc7 JPM |
97 | u16 snt_unacked; |
98 | u16 snd_win; | |
60020e18 | 99 | u16 peer_caps; |
10724cc7 JPM |
100 | u16 rcv_unacked; |
101 | u16 rcv_win; | |
aeda16b6 | 102 | struct sockaddr_tipc peer; |
07f6c4bc YX |
103 | struct rhash_head node; |
104 | struct rcu_head rcu; | |
301bae56 | 105 | }; |
b97bf3fd | 106 | |
4f4482dc | 107 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 108 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 109 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 110 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c YX |
111 | static int tipc_release(struct socket *sock); |
112 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
f2f2a96a | 113 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 114 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 115 | struct tipc_name_seq const *seq); |
301bae56 | 116 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 117 | struct tipc_name_seq const *seq); |
e05b31f4 | 118 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
119 | static int tipc_sk_insert(struct tipc_sock *tsk); |
120 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
39a0295f YX |
121 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, |
122 | size_t dsz); | |
123 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); | |
b97bf3fd | 124 | |
bca65eae FW |
125 | static const struct proto_ops packet_ops; |
126 | static const struct proto_ops stream_ops; | |
127 | static const struct proto_ops msg_ops; | |
b97bf3fd | 128 | static struct proto tipc_proto; |
6cca7289 HX |
129 | static const struct rhashtable_params tsk_rht_params; |
130 | ||
c5898636 JPM |
131 | static u32 tsk_own_node(struct tipc_sock *tsk) |
132 | { | |
133 | return msg_prevnode(&tsk->phdr); | |
134 | } | |
135 | ||
301bae56 | 136 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 137 | { |
301bae56 | 138 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
139 | } |
140 | ||
301bae56 | 141 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 142 | { |
301bae56 | 143 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
144 | } |
145 | ||
301bae56 | 146 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 147 | { |
301bae56 | 148 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
149 | } |
150 | ||
301bae56 | 151 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 152 | { |
301bae56 | 153 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
154 | } |
155 | ||
301bae56 | 156 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 157 | { |
301bae56 | 158 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
159 | } |
160 | ||
301bae56 | 161 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 162 | { |
301bae56 | 163 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
164 | } |
165 | ||
301bae56 | 166 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 167 | { |
301bae56 | 168 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
169 | } |
170 | ||
301bae56 | 171 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
172 | { |
173 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
174 | return -EINVAL; | |
301bae56 | 175 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
176 | return 0; |
177 | } | |
8826cde6 | 178 | |
301bae56 JPM |
179 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
180 | { | |
181 | return container_of(sk, struct tipc_sock, sk); | |
182 | } | |
183 | ||
10724cc7 | 184 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 185 | { |
6998cc6e | 186 | return tsk->snt_unacked > tsk->snd_win; |
10724cc7 JPM |
187 | } |
188 | ||
189 | /* tsk_blocks(): translate a buffer size in bytes to number of | |
190 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
191 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
192 | */ | |
193 | static u16 tsk_adv_blocks(int len) | |
194 | { | |
195 | return len / FLOWCTL_BLK_SZ / 4; | |
196 | } | |
197 | ||
198 | /* tsk_inc(): increment counter for sent or received data | |
199 | * - If block based flow control is not supported by peer we | |
200 | * fall back to message based ditto, incrementing the counter | |
201 | */ | |
202 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
203 | { | |
204 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
205 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
206 | return 1; | |
301bae56 JPM |
207 | } |
208 | ||
0c3141e9 | 209 | /** |
2e84c60b | 210 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
211 | * |
212 | * Caller must hold socket lock | |
b97bf3fd | 213 | */ |
2e84c60b | 214 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 215 | { |
5f6d9123 | 216 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
217 | } |
218 | ||
bcd3ffd4 JPM |
219 | /* tipc_sk_respond() : send response message back to sender |
220 | */ | |
221 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
222 | { | |
223 | u32 selector; | |
224 | u32 dnode; | |
225 | u32 onode = tipc_own_addr(sock_net(sk)); | |
226 | ||
227 | if (!tipc_msg_reverse(onode, &skb, err)) | |
228 | return; | |
229 | ||
230 | dnode = msg_destnode(buf_msg(skb)); | |
231 | selector = msg_origport(buf_msg(skb)); | |
232 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
233 | } | |
234 | ||
b97bf3fd | 235 | /** |
2e84c60b | 236 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
237 | * |
238 | * Caller must hold socket lock | |
b97bf3fd | 239 | */ |
2e84c60b | 240 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 241 | { |
a6ca1094 | 242 | struct sk_buff *skb; |
0c3141e9 | 243 | |
bcd3ffd4 JPM |
244 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
245 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
246 | } |
247 | ||
d6fb7e9c PB |
248 | static bool tipc_sk_connected(struct sock *sk) |
249 | { | |
f40acbaf | 250 | return sk->sk_state == TIPC_ESTABLISHED; |
d6fb7e9c PB |
251 | } |
252 | ||
c752023a PB |
253 | /* tipc_sk_type_connectionless - check if the socket is datagram socket |
254 | * @sk: socket | |
255 | * | |
256 | * Returns true if connection less, false otherwise | |
257 | */ | |
258 | static bool tipc_sk_type_connectionless(struct sock *sk) | |
259 | { | |
260 | return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM; | |
261 | } | |
262 | ||
2e84c60b | 263 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
264 | * |
265 | * Handles cases where the node's network address has changed from | |
266 | * the default of <0.0.0> to its configured setting. | |
267 | */ | |
2e84c60b | 268 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 269 | { |
d6fb7e9c PB |
270 | struct sock *sk = &tsk->sk; |
271 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); | |
301bae56 | 272 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
273 | u32 orig_node; |
274 | u32 peer_node; | |
275 | ||
d6fb7e9c | 276 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
277 | return false; |
278 | ||
279 | if (unlikely(msg_origport(msg) != peer_port)) | |
280 | return false; | |
281 | ||
282 | orig_node = msg_orignode(msg); | |
301bae56 | 283 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
284 | |
285 | if (likely(orig_node == peer_node)) | |
286 | return true; | |
287 | ||
34747539 | 288 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
289 | return true; |
290 | ||
34747539 | 291 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
292 | return true; |
293 | ||
294 | return false; | |
295 | } | |
296 | ||
0c288c86 PB |
297 | /* tipc_set_sk_state - set the sk_state of the socket |
298 | * @sk: socket | |
299 | * | |
300 | * Caller must hold socket lock | |
301 | * | |
302 | * Returns 0 on success, errno otherwise | |
303 | */ | |
304 | static int tipc_set_sk_state(struct sock *sk, int state) | |
305 | { | |
438adcaf | 306 | int oldsk_state = sk->sk_state; |
0c288c86 PB |
307 | int res = -EINVAL; |
308 | ||
309 | switch (state) { | |
438adcaf PB |
310 | case TIPC_OPEN: |
311 | res = 0; | |
312 | break; | |
0c288c86 | 313 | case TIPC_LISTEN: |
99a20889 | 314 | case TIPC_CONNECTING: |
438adcaf | 315 | if (oldsk_state == TIPC_OPEN) |
0c288c86 PB |
316 | res = 0; |
317 | break; | |
8ea642ee | 318 | case TIPC_ESTABLISHED: |
99a20889 | 319 | if (oldsk_state == TIPC_CONNECTING || |
438adcaf | 320 | oldsk_state == TIPC_OPEN) |
8ea642ee PB |
321 | res = 0; |
322 | break; | |
9fd4b070 | 323 | case TIPC_DISCONNECTING: |
99a20889 | 324 | if (oldsk_state == TIPC_CONNECTING || |
9fd4b070 PB |
325 | oldsk_state == TIPC_ESTABLISHED) |
326 | res = 0; | |
327 | break; | |
0c288c86 PB |
328 | } |
329 | ||
330 | if (!res) | |
331 | sk->sk_state = state; | |
332 | ||
333 | return res; | |
334 | } | |
335 | ||
8c44e1af JPM |
336 | static int tipc_sk_sock_err(struct socket *sock, long *timeout) |
337 | { | |
338 | struct sock *sk = sock->sk; | |
339 | int err = sock_error(sk); | |
340 | int typ = sock->type; | |
341 | ||
342 | if (err) | |
343 | return err; | |
344 | if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) { | |
345 | if (sk->sk_state == TIPC_DISCONNECTING) | |
346 | return -EPIPE; | |
347 | else if (!tipc_sk_connected(sk)) | |
348 | return -ENOTCONN; | |
349 | } | |
350 | if (!*timeout) | |
351 | return -EAGAIN; | |
352 | if (signal_pending(current)) | |
353 | return sock_intr_errno(*timeout); | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | #define tipc_wait_for_cond(sock_, timeout_, condition_) \ | |
359 | ({ \ | |
360 | int rc_ = 0; \ | |
361 | int done_ = 0; \ | |
362 | \ | |
363 | while (!(condition_) && !done_) { \ | |
364 | struct sock *sk_ = sock->sk; \ | |
365 | DEFINE_WAIT_FUNC(wait_, woken_wake_function); \ | |
366 | \ | |
367 | rc_ = tipc_sk_sock_err(sock_, timeout_); \ | |
368 | if (rc_) \ | |
369 | break; \ | |
370 | prepare_to_wait(sk_sleep(sk_), &wait_, \ | |
371 | TASK_INTERRUPTIBLE); \ | |
372 | done_ = sk_wait_event(sk_, timeout_, \ | |
373 | (condition_), &wait_); \ | |
374 | remove_wait_queue(sk_sleep(sk_), &wait_); \ | |
375 | } \ | |
376 | rc_; \ | |
377 | }) | |
378 | ||
b97bf3fd | 379 | /** |
c5fa7b3c | 380 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 381 | * @net: network namespace (must be default network) |
b97bf3fd PL |
382 | * @sock: pre-allocated socket structure |
383 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 384 | * @kern: caused by kernel or by userspace? |
c4307285 | 385 | * |
0c3141e9 AS |
386 | * This routine creates additional data structures used by the TIPC socket, |
387 | * initializes them, and links them together. | |
b97bf3fd PL |
388 | * |
389 | * Returns 0 on success, errno otherwise | |
390 | */ | |
58ed9442 JPM |
391 | static int tipc_sk_create(struct net *net, struct socket *sock, |
392 | int protocol, int kern) | |
b97bf3fd | 393 | { |
c5898636 | 394 | struct tipc_net *tn; |
0c3141e9 | 395 | const struct proto_ops *ops; |
b97bf3fd | 396 | struct sock *sk; |
58ed9442 | 397 | struct tipc_sock *tsk; |
5b8fa7ce | 398 | struct tipc_msg *msg; |
0c3141e9 AS |
399 | |
400 | /* Validate arguments */ | |
b97bf3fd PL |
401 | if (unlikely(protocol != 0)) |
402 | return -EPROTONOSUPPORT; | |
403 | ||
b97bf3fd PL |
404 | switch (sock->type) { |
405 | case SOCK_STREAM: | |
0c3141e9 | 406 | ops = &stream_ops; |
b97bf3fd PL |
407 | break; |
408 | case SOCK_SEQPACKET: | |
0c3141e9 | 409 | ops = &packet_ops; |
b97bf3fd PL |
410 | break; |
411 | case SOCK_DGRAM: | |
b97bf3fd | 412 | case SOCK_RDM: |
0c3141e9 | 413 | ops = &msg_ops; |
b97bf3fd | 414 | break; |
49978651 | 415 | default: |
49978651 | 416 | return -EPROTOTYPE; |
b97bf3fd PL |
417 | } |
418 | ||
0c3141e9 | 419 | /* Allocate socket's protocol area */ |
11aa9c28 | 420 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 421 | if (sk == NULL) |
b97bf3fd | 422 | return -ENOMEM; |
b97bf3fd | 423 | |
58ed9442 | 424 | tsk = tipc_sk(sk); |
301bae56 | 425 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
426 | INIT_LIST_HEAD(&tsk->publications); |
427 | msg = &tsk->phdr; | |
c5898636 JPM |
428 | tn = net_generic(sock_net(sk), tipc_net_id); |
429 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 430 | NAMED_H_SIZE, 0); |
b97bf3fd | 431 | |
0c3141e9 | 432 | /* Finish initializing socket data structures */ |
0c3141e9 | 433 | sock->ops = ops; |
0c3141e9 | 434 | sock_init_data(sock, sk); |
438adcaf | 435 | tipc_set_sk_state(sk, TIPC_OPEN); |
07f6c4bc | 436 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 437 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
438 | return -EINVAL; |
439 | } | |
440 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 441 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
6f00089c | 442 | sk->sk_shutdown = 0; |
4f4482dc | 443 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 444 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
445 | sk->sk_data_ready = tipc_data_ready; |
446 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 447 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc JPM |
448 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
449 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
7ef43eba | 450 | |
10724cc7 JPM |
451 | /* Start out with safe limits until we receive an advertised window */ |
452 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
453 | tsk->rcv_win = tsk->snd_win; | |
454 | ||
c752023a | 455 | if (tipc_sk_type_connectionless(sk)) { |
301bae56 | 456 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 457 | if (sock->type == SOCK_DGRAM) |
301bae56 | 458 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 459 | } |
438adcaf | 460 | |
b97bf3fd PL |
461 | return 0; |
462 | } | |
463 | ||
07f6c4bc YX |
464 | static void tipc_sk_callback(struct rcu_head *head) |
465 | { | |
466 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
467 | ||
468 | sock_put(&tsk->sk); | |
469 | } | |
470 | ||
6f00089c PB |
471 | /* Caller should hold socket lock for the socket. */ |
472 | static void __tipc_shutdown(struct socket *sock, int error) | |
473 | { | |
474 | struct sock *sk = sock->sk; | |
475 | struct tipc_sock *tsk = tipc_sk(sk); | |
476 | struct net *net = sock_net(sk); | |
477 | u32 dnode = tsk_peer_node(tsk); | |
478 | struct sk_buff *skb; | |
479 | ||
480 | /* Reject all unreceived messages, except on an active connection | |
481 | * (which disconnects locally & sends a 'FIN+' to peer). | |
482 | */ | |
483 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { | |
484 | if (TIPC_SKB_CB(skb)->bytes_read) { | |
485 | kfree_skb(skb); | |
693c5649 | 486 | continue; |
6f00089c | 487 | } |
693c5649 JPM |
488 | if (!tipc_sk_type_connectionless(sk) && |
489 | sk->sk_state != TIPC_DISCONNECTING) { | |
490 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
491 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
492 | } | |
493 | tipc_sk_respond(sk, skb, error); | |
6f00089c | 494 | } |
693c5649 JPM |
495 | |
496 | if (tipc_sk_type_connectionless(sk)) | |
497 | return; | |
498 | ||
6f00089c PB |
499 | if (sk->sk_state != TIPC_DISCONNECTING) { |
500 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
501 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, | |
502 | tsk_own_node(tsk), tsk_peer_port(tsk), | |
503 | tsk->portid, error); | |
504 | if (skb) | |
505 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
693c5649 JPM |
506 | tipc_node_remove_conn(net, dnode, tsk->portid); |
507 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
6f00089c PB |
508 | } |
509 | } | |
510 | ||
b97bf3fd | 511 | /** |
247f0f3c | 512 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
513 | * @sock: socket to destroy |
514 | * | |
515 | * This routine cleans up any messages that are still queued on the socket. | |
516 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
517 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
518 | * and any others are discarded. (If the first message on a STREAM socket | |
519 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 520 | * |
b97bf3fd PL |
521 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
522 | * are returned or discarded according to the "destination droppable" setting | |
523 | * specified for the message by the sender. | |
524 | * | |
525 | * Returns 0 on success, errno otherwise | |
526 | */ | |
247f0f3c | 527 | static int tipc_release(struct socket *sock) |
b97bf3fd | 528 | { |
b97bf3fd | 529 | struct sock *sk = sock->sk; |
58ed9442 | 530 | struct tipc_sock *tsk; |
b97bf3fd | 531 | |
0c3141e9 AS |
532 | /* |
533 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
534 | * releases a pre-allocated child socket that was never used) | |
535 | */ | |
0c3141e9 | 536 | if (sk == NULL) |
b97bf3fd | 537 | return 0; |
c4307285 | 538 | |
58ed9442 | 539 | tsk = tipc_sk(sk); |
0c3141e9 AS |
540 | lock_sock(sk); |
541 | ||
6f00089c PB |
542 | __tipc_shutdown(sock, TIPC_ERR_NO_PORT); |
543 | sk->sk_shutdown = SHUTDOWN_MASK; | |
301bae56 | 544 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 545 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 546 | tipc_sk_remove(tsk); |
b97bf3fd | 547 | |
0c3141e9 | 548 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 | 549 | release_sock(sk); |
07f6c4bc YX |
550 | |
551 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 552 | sock->sk = NULL; |
b97bf3fd | 553 | |
065d7e39 | 554 | return 0; |
b97bf3fd PL |
555 | } |
556 | ||
557 | /** | |
247f0f3c | 558 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
559 | * @sock: socket structure |
560 | * @uaddr: socket address describing name(s) and desired operation | |
561 | * @uaddr_len: size of socket address data structure | |
c4307285 | 562 | * |
b97bf3fd PL |
563 | * Name and name sequence binding is indicated using a positive scope value; |
564 | * a negative scope value unbinds the specified name. Specifying no name | |
565 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 566 | * |
b97bf3fd | 567 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
568 | * |
569 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
570 | * access any non-constant socket information. | |
b97bf3fd | 571 | */ |
247f0f3c YX |
572 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
573 | int uaddr_len) | |
b97bf3fd | 574 | { |
84602761 | 575 | struct sock *sk = sock->sk; |
b97bf3fd | 576 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 577 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 578 | int res = -EINVAL; |
b97bf3fd | 579 | |
84602761 YX |
580 | lock_sock(sk); |
581 | if (unlikely(!uaddr_len)) { | |
301bae56 | 582 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
583 | goto exit; |
584 | } | |
c4307285 | 585 | |
84602761 YX |
586 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
587 | res = -EINVAL; | |
588 | goto exit; | |
589 | } | |
590 | if (addr->family != AF_TIPC) { | |
591 | res = -EAFNOSUPPORT; | |
592 | goto exit; | |
593 | } | |
b97bf3fd | 594 | |
b97bf3fd PL |
595 | if (addr->addrtype == TIPC_ADDR_NAME) |
596 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
597 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
598 | res = -EAFNOSUPPORT; | |
599 | goto exit; | |
600 | } | |
c4307285 | 601 | |
13a2e898 | 602 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 603 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
604 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
605 | res = -EACCES; | |
606 | goto exit; | |
607 | } | |
c422f1bd | 608 | |
84602761 | 609 | res = (addr->scope > 0) ? |
301bae56 JPM |
610 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
611 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
612 | exit: |
613 | release_sock(sk); | |
614 | return res; | |
b97bf3fd PL |
615 | } |
616 | ||
c4307285 | 617 | /** |
247f0f3c | 618 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
619 | * @sock: socket structure |
620 | * @uaddr: area for returned socket address | |
621 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 622 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 623 | * |
b97bf3fd | 624 | * Returns 0 on success, errno otherwise |
0c3141e9 | 625 | * |
2da59918 AS |
626 | * NOTE: This routine doesn't need to take the socket lock since it only |
627 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 628 | * a completely predictable manner). |
b97bf3fd | 629 | */ |
247f0f3c YX |
630 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
631 | int *uaddr_len, int peer) | |
b97bf3fd | 632 | { |
b97bf3fd | 633 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
9fd4b070 PB |
634 | struct sock *sk = sock->sk; |
635 | struct tipc_sock *tsk = tipc_sk(sk); | |
34747539 | 636 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 637 | |
88f8a5e3 | 638 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 639 | if (peer) { |
f40acbaf | 640 | if ((!tipc_sk_connected(sk)) && |
9fd4b070 | 641 | ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING))) |
2da59918 | 642 | return -ENOTCONN; |
301bae56 JPM |
643 | addr->addr.id.ref = tsk_peer_port(tsk); |
644 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 645 | } else { |
07f6c4bc | 646 | addr->addr.id.ref = tsk->portid; |
34747539 | 647 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 648 | } |
b97bf3fd PL |
649 | |
650 | *uaddr_len = sizeof(*addr); | |
651 | addr->addrtype = TIPC_ADDR_ID; | |
652 | addr->family = AF_TIPC; | |
653 | addr->scope = 0; | |
b97bf3fd PL |
654 | addr->addr.name.domain = 0; |
655 | ||
0c3141e9 | 656 | return 0; |
b97bf3fd PL |
657 | } |
658 | ||
659 | /** | |
247f0f3c | 660 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
661 | * @file: file structure associated with the socket |
662 | * @sock: socket for which to calculate the poll bits | |
663 | * @wait: ??? | |
664 | * | |
9b674e82 AS |
665 | * Returns pollmask value |
666 | * | |
667 | * COMMENTARY: | |
668 | * It appears that the usual socket locking mechanisms are not useful here | |
669 | * since the pollmask info is potentially out-of-date the moment this routine | |
670 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
671 | * to handle any preventable race conditions, so TIPC will do the same ... | |
672 | * | |
f662c070 AS |
673 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
674 | * imply that the operation will succeed, merely that it should be performed | |
675 | * and will not block. | |
b97bf3fd | 676 | */ |
247f0f3c YX |
677 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
678 | poll_table *wait) | |
b97bf3fd | 679 | { |
9b674e82 | 680 | struct sock *sk = sock->sk; |
58ed9442 | 681 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 682 | u32 mask = 0; |
9b674e82 | 683 | |
f288bef4 | 684 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 685 | |
6f00089c PB |
686 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
687 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; | |
688 | if (sk->sk_shutdown == SHUTDOWN_MASK) | |
689 | mask |= POLLHUP; | |
690 | ||
f40acbaf PB |
691 | switch (sk->sk_state) { |
692 | case TIPC_ESTABLISHED: | |
301bae56 | 693 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 | 694 | mask |= POLLOUT; |
f40acbaf PB |
695 | /* fall thru' */ |
696 | case TIPC_LISTEN: | |
697 | case TIPC_CONNECTING: | |
f662c070 AS |
698 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
699 | mask |= (POLLIN | POLLRDNORM); | |
f40acbaf PB |
700 | break; |
701 | case TIPC_OPEN: | |
702 | if (!tsk->link_cong) | |
703 | mask |= POLLOUT; | |
704 | if (tipc_sk_type_connectionless(sk) && | |
705 | (!skb_queue_empty(&sk->sk_receive_queue))) | |
706 | mask |= (POLLIN | POLLRDNORM); | |
707 | break; | |
708 | case TIPC_DISCONNECTING: | |
709 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
710 | break; | |
f662c070 | 711 | } |
9b674e82 AS |
712 | |
713 | return mask; | |
b97bf3fd PL |
714 | } |
715 | ||
0abd8ff2 JPM |
716 | /** |
717 | * tipc_sendmcast - send multicast message | |
718 | * @sock: socket structure | |
719 | * @seq: destination address | |
562640f3 | 720 | * @msg: message to send |
0abd8ff2 JPM |
721 | * @dsz: total length of message data |
722 | * @timeo: timeout to wait for wakeup | |
723 | * | |
724 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
725 | * Returns the number of bytes sent on success, or errno | |
726 | */ | |
727 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 728 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
729 | { |
730 | struct sock *sk = sock->sk; | |
c5898636 | 731 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 732 | struct net *net = sock_net(sk); |
c5898636 | 733 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 734 | struct sk_buff_head pktchain; |
f25dcc76 | 735 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
736 | uint mtu; |
737 | int rc; | |
738 | ||
7cf87fa2 PB |
739 | if (!timeo && tsk->link_cong) |
740 | return -ELINKCONG; | |
741 | ||
0abd8ff2 JPM |
742 | msg_set_type(mhdr, TIPC_MCAST_MSG); |
743 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
744 | msg_set_destport(mhdr, 0); | |
745 | msg_set_destnode(mhdr, 0); | |
746 | msg_set_nametype(mhdr, seq->type); | |
747 | msg_set_namelower(mhdr, seq->lower); | |
748 | msg_set_nameupper(mhdr, seq->upper); | |
749 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
750 | ||
f214fc40 PB |
751 | skb_queue_head_init(&pktchain); |
752 | ||
0abd8ff2 | 753 | new_mtu: |
959e1781 | 754 | mtu = tipc_bcast_get_mtu(net); |
f214fc40 | 755 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &pktchain); |
0abd8ff2 JPM |
756 | if (unlikely(rc < 0)) |
757 | return rc; | |
758 | ||
759 | do { | |
f214fc40 | 760 | rc = tipc_bcast_xmit(net, &pktchain); |
22d85c79 JPM |
761 | if (likely(!rc)) |
762 | return dsz; | |
763 | ||
764 | if (rc == -ELINKCONG) { | |
765 | tsk->link_cong = 1; | |
8c44e1af | 766 | rc = tipc_wait_for_cond(sock, &timeo, !tsk->link_cong); |
22d85c79 JPM |
767 | if (!rc) |
768 | continue; | |
0abd8ff2 | 769 | } |
f214fc40 | 770 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
771 | if (rc == -EMSGSIZE) { |
772 | msg->msg_iter = save; | |
0abd8ff2 | 773 | goto new_mtu; |
f25dcc76 | 774 | } |
22d85c79 JPM |
775 | break; |
776 | } while (1); | |
0abd8ff2 JPM |
777 | return rc; |
778 | } | |
779 | ||
cb1b7280 JPM |
780 | /** |
781 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
782 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
783 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
784 | * | |
785 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 786 | */ |
cb1b7280 JPM |
787 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
788 | struct sk_buff_head *inputq) | |
078bec82 | 789 | { |
cb1b7280 | 790 | struct tipc_msg *msg; |
3c724acd | 791 | struct tipc_plist dports; |
3c724acd | 792 | u32 portid; |
078bec82 | 793 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
794 | struct sk_buff_head tmpq; |
795 | uint hsz; | |
796 | struct sk_buff *skb, *_skb; | |
3c724acd | 797 | |
cb1b7280 | 798 | __skb_queue_head_init(&tmpq); |
3c724acd | 799 | tipc_plist_init(&dports); |
078bec82 | 800 | |
cb1b7280 JPM |
801 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
802 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
803 | msg = buf_msg(skb); | |
804 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
805 | ||
806 | if (in_own_node(net, msg_orignode(msg))) | |
807 | scope = TIPC_NODE_SCOPE; | |
808 | ||
809 | /* Create destination port list and message clones: */ | |
810 | tipc_nametbl_mc_translate(net, | |
811 | msg_nametype(msg), msg_namelower(msg), | |
812 | msg_nameupper(msg), scope, &dports); | |
813 | portid = tipc_plist_pop(&dports); | |
814 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
815 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
816 | if (_skb) { | |
817 | msg_set_destport(buf_msg(_skb), portid); | |
818 | __skb_queue_tail(&tmpq, _skb); | |
819 | continue; | |
820 | } | |
821 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 822 | } |
cb1b7280 JPM |
823 | /* Append to inputq if not already done by other thread */ |
824 | spin_lock_bh(&inputq->lock); | |
825 | if (skb_peek(arrvq) == skb) { | |
826 | skb_queue_splice_tail_init(&tmpq, inputq); | |
827 | kfree_skb(__skb_dequeue(arrvq)); | |
828 | } | |
829 | spin_unlock_bh(&inputq->lock); | |
830 | __skb_queue_purge(&tmpq); | |
831 | kfree_skb(skb); | |
078bec82 | 832 | } |
cb1b7280 | 833 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
834 | } |
835 | ||
ac0074ee JPM |
836 | /** |
837 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
838 | * @tsk: receiving socket | |
bcd3ffd4 | 839 | * @skb: pointer to message buffer. |
ac0074ee | 840 | */ |
f1d048f2 JPM |
841 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
842 | struct sk_buff_head *xmitq) | |
ac0074ee | 843 | { |
bcd3ffd4 | 844 | struct sock *sk = &tsk->sk; |
f1d048f2 | 845 | u32 onode = tsk_own_node(tsk); |
bcd3ffd4 JPM |
846 | struct tipc_msg *hdr = buf_msg(skb); |
847 | int mtyp = msg_type(hdr); | |
10724cc7 | 848 | bool conn_cong; |
bcd3ffd4 | 849 | |
ac0074ee | 850 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 851 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
852 | goto exit; |
853 | ||
8ea642ee | 854 | tsk->probe_unacked = false; |
ac0074ee | 855 | |
bcd3ffd4 JPM |
856 | if (mtyp == CONN_PROBE) { |
857 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
858 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
859 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
860 | return; |
861 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 862 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
863 | tsk->snt_unacked -= msg_conn_ack(hdr); |
864 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
865 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 866 | if (conn_cong) |
bcd3ffd4 JPM |
867 | sk->sk_write_space(sk); |
868 | } else if (mtyp != CONN_PROBE_REPLY) { | |
869 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 870 | } |
ac0074ee | 871 | exit: |
bcd3ffd4 | 872 | kfree_skb(skb); |
ac0074ee JPM |
873 | } |
874 | ||
b97bf3fd | 875 | /** |
247f0f3c | 876 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
877 | * @sock: socket structure |
878 | * @m: message to send | |
e2dafe87 | 879 | * @dsz: amount of user data to be sent |
c4307285 | 880 | * |
b97bf3fd | 881 | * Message must have an destination specified explicitly. |
c4307285 | 882 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
883 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
884 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 885 | * |
b97bf3fd PL |
886 | * Returns the number of bytes sent on success, or errno otherwise |
887 | */ | |
1b784140 | 888 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 889 | struct msghdr *m, size_t dsz) |
39a0295f YX |
890 | { |
891 | struct sock *sk = sock->sk; | |
892 | int ret; | |
893 | ||
894 | lock_sock(sk); | |
895 | ret = __tipc_sendmsg(sock, m, dsz); | |
896 | release_sock(sk); | |
897 | ||
898 | return ret; | |
899 | } | |
900 | ||
901 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 902 | { |
e2dafe87 | 903 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 904 | struct sock *sk = sock->sk; |
58ed9442 | 905 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 906 | struct net *net = sock_net(sk); |
301bae56 | 907 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 908 | u32 dnode, dport; |
f214fc40 | 909 | struct sk_buff_head pktchain; |
c752023a | 910 | bool is_connectionless = tipc_sk_type_connectionless(sk); |
a6ca1094 | 911 | struct sk_buff *skb; |
f2f8036e | 912 | struct tipc_name_seq *seq; |
f25dcc76 | 913 | struct iov_iter save; |
e2dafe87 | 914 | u32 mtu; |
3f40504f | 915 | long timeo; |
88b17b6a | 916 | int rc; |
b97bf3fd | 917 | |
e2dafe87 | 918 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 919 | return -EMSGSIZE; |
f2f8036e | 920 | if (unlikely(!dest)) { |
c752023a | 921 | if (is_connectionless && tsk->peer.family == AF_TIPC) |
aeda16b6 | 922 | dest = &tsk->peer; |
f2f8036e EH |
923 | else |
924 | return -EDESTADDRREQ; | |
925 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || | |
926 | dest->family != AF_TIPC) { | |
927 | return -EINVAL; | |
928 | } | |
c752023a | 929 | if (!is_connectionless) { |
0c288c86 | 930 | if (sk->sk_state == TIPC_LISTEN) |
39a0295f | 931 | return -EPIPE; |
438adcaf | 932 | if (sk->sk_state != TIPC_OPEN) |
39a0295f YX |
933 | return -EISCONN; |
934 | if (tsk->published) | |
935 | return -EOPNOTSUPP; | |
3388007b | 936 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
937 | tsk->conn_type = dest->addr.name.name.type; |
938 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 939 | } |
b97bf3fd | 940 | } |
f2f8036e | 941 | seq = &dest->addr.nameseq; |
3f40504f | 942 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
943 | |
944 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 945 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
946 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
947 | u32 type = dest->addr.name.name.type; | |
948 | u32 inst = dest->addr.name.name.instance; | |
949 | u32 domain = dest->addr.name.domain; | |
950 | ||
951 | dnode = domain; | |
952 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
953 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
954 | msg_set_nametype(mhdr, type); | |
955 | msg_set_nameinst(mhdr, inst); | |
956 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 957 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
958 | msg_set_destnode(mhdr, dnode); |
959 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
960 | if (unlikely(!dport && !dnode)) |
961 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
962 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
963 | dnode = dest->addr.id.node; | |
964 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
965 | msg_set_lookup_scope(mhdr, 0); | |
966 | msg_set_destnode(mhdr, dnode); | |
967 | msg_set_destport(mhdr, dest->addr.id.ref); | |
968 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
969 | } | |
970 | ||
f214fc40 | 971 | skb_queue_head_init(&pktchain); |
f25dcc76 | 972 | save = m->msg_iter; |
e2dafe87 | 973 | new_mtu: |
f2f9800d | 974 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
f214fc40 | 975 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &pktchain); |
e2dafe87 | 976 | if (rc < 0) |
39a0295f | 977 | return rc; |
e2dafe87 JPM |
978 | |
979 | do { | |
f214fc40 | 980 | skb = skb_peek(&pktchain); |
a6ca1094 | 981 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
f214fc40 | 982 | rc = tipc_node_xmit(net, &pktchain, dnode, tsk->portid); |
22d85c79 | 983 | if (likely(!rc)) { |
c752023a | 984 | if (!is_connectionless) |
99a20889 | 985 | tipc_set_sk_state(sk, TIPC_CONNECTING); |
22d85c79 | 986 | return dsz; |
c4307285 | 987 | } |
22d85c79 JPM |
988 | if (rc == -ELINKCONG) { |
989 | tsk->link_cong = 1; | |
8c44e1af | 990 | rc = tipc_wait_for_cond(sock, &timeo, !tsk->link_cong); |
22d85c79 JPM |
991 | if (!rc) |
992 | continue; | |
993 | } | |
f214fc40 | 994 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
995 | if (rc == -EMSGSIZE) { |
996 | m->msg_iter = save; | |
e2dafe87 | 997 | goto new_mtu; |
f25dcc76 | 998 | } |
22d85c79 JPM |
999 | break; |
1000 | } while (1); | |
e2dafe87 JPM |
1001 | |
1002 | return rc; | |
b97bf3fd PL |
1003 | } |
1004 | ||
c4307285 | 1005 | /** |
4ccfe5e0 | 1006 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 1007 | * @sock: socket structure |
4ccfe5e0 JPM |
1008 | * @m: data to send |
1009 | * @dsz: total length of data to be transmitted | |
c4307285 | 1010 | * |
4ccfe5e0 | 1011 | * Used for SOCK_STREAM data. |
c4307285 | 1012 | * |
4ccfe5e0 JPM |
1013 | * Returns the number of bytes sent on success (or partial success), |
1014 | * or errno if no data sent | |
b97bf3fd | 1015 | */ |
1b784140 | 1016 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1017 | { |
1018 | struct sock *sk = sock->sk; | |
1019 | int ret; | |
1020 | ||
1021 | lock_sock(sk); | |
1022 | ret = __tipc_send_stream(sock, m, dsz); | |
1023 | release_sock(sk); | |
1024 | ||
1025 | return ret; | |
1026 | } | |
1027 | ||
1028 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1029 | { |
0c3141e9 | 1030 | struct sock *sk = sock->sk; |
f2f9800d | 1031 | struct net *net = sock_net(sk); |
58ed9442 | 1032 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1033 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 1034 | struct sk_buff_head pktchain; |
342dfc30 | 1035 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1036 | u32 portid = tsk->portid; |
4ccfe5e0 | 1037 | int rc = -EINVAL; |
391a6dd1 | 1038 | long timeo; |
4ccfe5e0 JPM |
1039 | u32 dnode; |
1040 | uint mtu, send, sent = 0; | |
f25dcc76 | 1041 | struct iov_iter save; |
10724cc7 | 1042 | int hlen = MIN_H_SIZE; |
b97bf3fd PL |
1043 | |
1044 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1045 | if (unlikely(dest)) { |
39a0295f | 1046 | rc = __tipc_sendmsg(sock, m, dsz); |
10724cc7 | 1047 | hlen = msg_hdr_sz(mhdr); |
4ccfe5e0 | 1048 | if (dsz && (dsz == rc)) |
10724cc7 | 1049 | tsk->snt_unacked = tsk_inc(tsk, dsz + hlen); |
4ccfe5e0 JPM |
1050 | return rc; |
1051 | } | |
1052 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1053 | return -EMSGSIZE; |
1054 | ||
f40acbaf | 1055 | if (unlikely(!tipc_sk_connected(sk))) { |
9fd4b070 | 1056 | if (sk->sk_state == TIPC_DISCONNECTING) |
39a0295f | 1057 | return -EPIPE; |
391a6dd1 | 1058 | else |
39a0295f | 1059 | return -ENOTCONN; |
391a6dd1 | 1060 | } |
1d835874 | 1061 | |
391a6dd1 | 1062 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
7cf87fa2 PB |
1063 | if (!timeo && tsk->link_cong) |
1064 | return -ELINKCONG; | |
1065 | ||
301bae56 | 1066 | dnode = tsk_peer_node(tsk); |
f214fc40 | 1067 | skb_queue_head_init(&pktchain); |
4ccfe5e0 JPM |
1068 | |
1069 | next: | |
f25dcc76 | 1070 | save = m->msg_iter; |
301bae56 | 1071 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1072 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
f214fc40 | 1073 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, &pktchain); |
4ccfe5e0 | 1074 | if (unlikely(rc < 0)) |
39a0295f | 1075 | return rc; |
f214fc40 | 1076 | |
c4307285 | 1077 | do { |
301bae56 | 1078 | if (likely(!tsk_conn_cong(tsk))) { |
f214fc40 | 1079 | rc = tipc_node_xmit(net, &pktchain, dnode, portid); |
4ccfe5e0 | 1080 | if (likely(!rc)) { |
10724cc7 | 1081 | tsk->snt_unacked += tsk_inc(tsk, send + hlen); |
4ccfe5e0 JPM |
1082 | sent += send; |
1083 | if (sent == dsz) | |
22d85c79 | 1084 | return dsz; |
4ccfe5e0 JPM |
1085 | goto next; |
1086 | } | |
1087 | if (rc == -EMSGSIZE) { | |
f214fc40 | 1088 | __skb_queue_purge(&pktchain); |
f2f9800d YX |
1089 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1090 | portid); | |
f25dcc76 | 1091 | m->msg_iter = save; |
4ccfe5e0 JPM |
1092 | goto next; |
1093 | } | |
1094 | if (rc != -ELINKCONG) | |
1095 | break; | |
22d85c79 | 1096 | |
50100a5e | 1097 | tsk->link_cong = 1; |
4ccfe5e0 | 1098 | } |
8c44e1af JPM |
1099 | rc = tipc_wait_for_cond(sock, &timeo, |
1100 | (!tsk->link_cong && | |
1101 | !tsk_conn_cong(tsk) && | |
1102 | tipc_sk_connected(sk))); | |
4ccfe5e0 | 1103 | } while (!rc); |
39a0295f | 1104 | |
f214fc40 | 1105 | __skb_queue_purge(&pktchain); |
4ccfe5e0 | 1106 | return sent ? sent : rc; |
b97bf3fd PL |
1107 | } |
1108 | ||
c4307285 | 1109 | /** |
4ccfe5e0 | 1110 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1111 | * @sock: socket structure |
4ccfe5e0 JPM |
1112 | * @m: message to send |
1113 | * @dsz: length of data to be transmitted | |
c4307285 | 1114 | * |
4ccfe5e0 | 1115 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1116 | * |
4ccfe5e0 | 1117 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1118 | */ |
1b784140 | 1119 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1120 | { |
4ccfe5e0 JPM |
1121 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1122 | return -EMSGSIZE; | |
b97bf3fd | 1123 | |
1b784140 | 1124 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1125 | } |
1126 | ||
dadebc00 | 1127 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1128 | */ |
301bae56 | 1129 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1130 | u32 peer_node) |
b97bf3fd | 1131 | { |
3721e9c7 YX |
1132 | struct sock *sk = &tsk->sk; |
1133 | struct net *net = sock_net(sk); | |
301bae56 | 1134 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1135 | |
dadebc00 JPM |
1136 | msg_set_destnode(msg, peer_node); |
1137 | msg_set_destport(msg, peer_port); | |
1138 | msg_set_type(msg, TIPC_CONN_MSG); | |
1139 | msg_set_lookup_scope(msg, 0); | |
1140 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1141 | |
360aab6b | 1142 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
8ea642ee | 1143 | tipc_set_sk_state(sk, TIPC_ESTABLISHED); |
f2f9800d YX |
1144 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1145 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1146 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1147 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1148 | return; | |
1149 | ||
1150 | /* Fall back to message based flow control */ | |
1151 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1152 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1153 | } |
1154 | ||
1155 | /** | |
1156 | * set_orig_addr - capture sender's address for received message | |
1157 | * @m: descriptor for message info | |
1158 | * @msg: received message header | |
c4307285 | 1159 | * |
b97bf3fd PL |
1160 | * Note: Address is not captured if not requested by receiver. |
1161 | */ | |
05790c64 | 1162 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1163 | { |
342dfc30 | 1164 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1165 | |
c4307285 | 1166 | if (addr) { |
b97bf3fd PL |
1167 | addr->family = AF_TIPC; |
1168 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1169 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1170 | addr->addr.id.ref = msg_origport(msg); |
1171 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1172 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1173 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1174 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1175 | } | |
1176 | } | |
1177 | ||
1178 | /** | |
301bae56 | 1179 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1180 | * @m: descriptor for message info |
1181 | * @msg: received message header | |
301bae56 | 1182 | * @tsk: TIPC port associated with message |
c4307285 | 1183 | * |
b97bf3fd | 1184 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1185 | * |
b97bf3fd PL |
1186 | * Returns 0 if successful, otherwise errno |
1187 | */ | |
301bae56 JPM |
1188 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1189 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1190 | { |
1191 | u32 anc_data[3]; | |
1192 | u32 err; | |
1193 | u32 dest_type; | |
3546c750 | 1194 | int has_name; |
b97bf3fd PL |
1195 | int res; |
1196 | ||
1197 | if (likely(m->msg_controllen == 0)) | |
1198 | return 0; | |
1199 | ||
1200 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1201 | err = msg ? msg_errcode(msg) : 0; |
1202 | if (unlikely(err)) { | |
1203 | anc_data[0] = err; | |
1204 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1205 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1206 | if (res) | |
b97bf3fd | 1207 | return res; |
2db9983a AS |
1208 | if (anc_data[1]) { |
1209 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1210 | msg_data(msg)); | |
1211 | if (res) | |
1212 | return res; | |
1213 | } | |
b97bf3fd PL |
1214 | } |
1215 | ||
1216 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1217 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1218 | switch (dest_type) { | |
1219 | case TIPC_NAMED_MSG: | |
3546c750 | 1220 | has_name = 1; |
b97bf3fd PL |
1221 | anc_data[0] = msg_nametype(msg); |
1222 | anc_data[1] = msg_namelower(msg); | |
1223 | anc_data[2] = msg_namelower(msg); | |
1224 | break; | |
1225 | case TIPC_MCAST_MSG: | |
3546c750 | 1226 | has_name = 1; |
b97bf3fd PL |
1227 | anc_data[0] = msg_nametype(msg); |
1228 | anc_data[1] = msg_namelower(msg); | |
1229 | anc_data[2] = msg_nameupper(msg); | |
1230 | break; | |
1231 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1232 | has_name = (tsk->conn_type != 0); |
1233 | anc_data[0] = tsk->conn_type; | |
1234 | anc_data[1] = tsk->conn_instance; | |
1235 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1236 | break; |
1237 | default: | |
3546c750 | 1238 | has_name = 0; |
b97bf3fd | 1239 | } |
2db9983a AS |
1240 | if (has_name) { |
1241 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1242 | if (res) | |
1243 | return res; | |
1244 | } | |
b97bf3fd PL |
1245 | |
1246 | return 0; | |
1247 | } | |
1248 | ||
10724cc7 | 1249 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1250 | { |
d6fb7e9c PB |
1251 | struct sock *sk = &tsk->sk; |
1252 | struct net *net = sock_net(sk); | |
a6ca1094 | 1253 | struct sk_buff *skb = NULL; |
739f5e4e | 1254 | struct tipc_msg *msg; |
301bae56 JPM |
1255 | u32 peer_port = tsk_peer_port(tsk); |
1256 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1257 | |
d6fb7e9c | 1258 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1259 | return; |
c5898636 JPM |
1260 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1261 | dnode, tsk_own_node(tsk), peer_port, | |
1262 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1263 | if (!skb) |
739f5e4e | 1264 | return; |
a6ca1094 | 1265 | msg = buf_msg(skb); |
10724cc7 JPM |
1266 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1267 | tsk->rcv_unacked = 0; | |
1268 | ||
1269 | /* Adjust to and advertize the correct window limit */ | |
1270 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1271 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1272 | msg_set_adv_win(msg, tsk->rcv_win); | |
1273 | } | |
af9b028e | 1274 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1275 | } |
1276 | ||
85d3fc94 | 1277 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1278 | { |
1279 | struct sock *sk = sock->sk; | |
1280 | DEFINE_WAIT(wait); | |
85d3fc94 | 1281 | long timeo = *timeop; |
9bbb4ecc YX |
1282 | int err; |
1283 | ||
1284 | for (;;) { | |
1285 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1286 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6f00089c | 1287 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9bbb4ecc YX |
1288 | err = -ENOTCONN; |
1289 | break; | |
1290 | } | |
1291 | release_sock(sk); | |
1292 | timeo = schedule_timeout(timeo); | |
1293 | lock_sock(sk); | |
1294 | } | |
1295 | err = 0; | |
1296 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1297 | break; | |
9bbb4ecc YX |
1298 | err = -EAGAIN; |
1299 | if (!timeo) | |
1300 | break; | |
143fe22f EH |
1301 | err = sock_intr_errno(timeo); |
1302 | if (signal_pending(current)) | |
1303 | break; | |
9bbb4ecc YX |
1304 | } |
1305 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1306 | *timeop = timeo; |
9bbb4ecc YX |
1307 | return err; |
1308 | } | |
1309 | ||
c4307285 | 1310 | /** |
247f0f3c | 1311 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1312 | * @m: descriptor for message info |
1313 | * @buf_len: total size of user buffer area | |
1314 | * @flags: receive flags | |
c4307285 | 1315 | * |
b97bf3fd PL |
1316 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1317 | * If the complete message doesn't fit in user area, truncate it. | |
1318 | * | |
1319 | * Returns size of returned message data, errno otherwise | |
1320 | */ | |
1b784140 YX |
1321 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1322 | int flags) | |
b97bf3fd | 1323 | { |
0c3141e9 | 1324 | struct sock *sk = sock->sk; |
58ed9442 | 1325 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1326 | struct sk_buff *buf; |
1327 | struct tipc_msg *msg; | |
c752023a | 1328 | bool is_connectionless = tipc_sk_type_connectionless(sk); |
9bbb4ecc | 1329 | long timeo; |
b97bf3fd PL |
1330 | unsigned int sz; |
1331 | u32 err; | |
10724cc7 | 1332 | int res, hlen; |
b97bf3fd | 1333 | |
0c3141e9 | 1334 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1335 | if (unlikely(!buf_len)) |
1336 | return -EINVAL; | |
1337 | ||
0c3141e9 | 1338 | lock_sock(sk); |
b97bf3fd | 1339 | |
438adcaf | 1340 | if (!is_connectionless && unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1341 | res = -ENOTCONN; |
b97bf3fd PL |
1342 | goto exit; |
1343 | } | |
1344 | ||
9bbb4ecc | 1345 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1346 | restart: |
b97bf3fd | 1347 | |
0c3141e9 | 1348 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1349 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1350 | if (res) |
1351 | goto exit; | |
b97bf3fd | 1352 | |
0c3141e9 | 1353 | /* Look at first message in receive queue */ |
0c3141e9 | 1354 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1355 | msg = buf_msg(buf); |
1356 | sz = msg_data_sz(msg); | |
10724cc7 | 1357 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1358 | err = msg_errcode(msg); |
1359 | ||
b97bf3fd | 1360 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1361 | if ((!sz) && (!err)) { |
2e84c60b | 1362 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1363 | goto restart; |
1364 | } | |
1365 | ||
1366 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1367 | set_orig_addr(m, msg); |
1368 | ||
1369 | /* Capture ancillary data (optional) */ | |
301bae56 | 1370 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1371 | if (res) |
b97bf3fd PL |
1372 | goto exit; |
1373 | ||
1374 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1375 | if (!err) { |
1376 | if (unlikely(buf_len < sz)) { | |
1377 | sz = buf_len; | |
1378 | m->msg_flags |= MSG_TRUNC; | |
1379 | } | |
10724cc7 | 1380 | res = skb_copy_datagram_msg(buf, hlen, m, sz); |
0232fd0a | 1381 | if (res) |
b97bf3fd | 1382 | goto exit; |
b97bf3fd PL |
1383 | res = sz; |
1384 | } else { | |
c752023a PB |
1385 | if (is_connectionless || err == TIPC_CONN_SHUTDOWN || |
1386 | m->msg_control) | |
b97bf3fd PL |
1387 | res = 0; |
1388 | else | |
1389 | res = -ECONNRESET; | |
1390 | } | |
1391 | ||
10724cc7 JPM |
1392 | if (unlikely(flags & MSG_PEEK)) |
1393 | goto exit; | |
1394 | ||
c752023a | 1395 | if (likely(!is_connectionless)) { |
10724cc7 JPM |
1396 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); |
1397 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1398 | tipc_sk_send_ack(tsk); | |
c4307285 | 1399 | } |
10724cc7 | 1400 | tsk_advance_rx_queue(sk); |
b97bf3fd | 1401 | exit: |
0c3141e9 | 1402 | release_sock(sk); |
b97bf3fd PL |
1403 | return res; |
1404 | } | |
1405 | ||
c4307285 | 1406 | /** |
247f0f3c | 1407 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1408 | * @m: descriptor for message info |
1409 | * @buf_len: total size of user buffer area | |
1410 | * @flags: receive flags | |
c4307285 YH |
1411 | * |
1412 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1413 | * will optionally wait for more; never truncates data. |
1414 | * | |
1415 | * Returns size of returned message data, errno otherwise | |
1416 | */ | |
1b784140 YX |
1417 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1418 | size_t buf_len, int flags) | |
b97bf3fd | 1419 | { |
0c3141e9 | 1420 | struct sock *sk = sock->sk; |
58ed9442 | 1421 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1422 | struct sk_buff *buf; |
1423 | struct tipc_msg *msg; | |
9bbb4ecc | 1424 | long timeo; |
b97bf3fd | 1425 | unsigned int sz; |
ba8aebe9 | 1426 | int target; |
b97bf3fd | 1427 | int sz_copied = 0; |
b97bf3fd | 1428 | u32 err; |
10724cc7 | 1429 | int res = 0, hlen; |
b97bf3fd | 1430 | |
0c3141e9 | 1431 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1432 | if (unlikely(!buf_len)) |
1433 | return -EINVAL; | |
1434 | ||
0c3141e9 | 1435 | lock_sock(sk); |
b97bf3fd | 1436 | |
438adcaf | 1437 | if (unlikely(sk->sk_state == TIPC_OPEN)) { |
0c3141e9 | 1438 | res = -ENOTCONN; |
b97bf3fd PL |
1439 | goto exit; |
1440 | } | |
1441 | ||
3720d40b | 1442 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1443 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1444 | |
617d3c7a | 1445 | restart: |
0c3141e9 | 1446 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1447 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1448 | if (res) |
1449 | goto exit; | |
b97bf3fd | 1450 | |
0c3141e9 | 1451 | /* Look at first message in receive queue */ |
0c3141e9 | 1452 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1453 | msg = buf_msg(buf); |
1454 | sz = msg_data_sz(msg); | |
10724cc7 | 1455 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1456 | err = msg_errcode(msg); |
1457 | ||
1458 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1459 | if ((!sz) && (!err)) { |
2e84c60b | 1460 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1461 | goto restart; |
1462 | } | |
1463 | ||
1464 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1465 | if (sz_copied == 0) { |
1466 | set_orig_addr(m, msg); | |
301bae56 | 1467 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1468 | if (res) |
b97bf3fd PL |
1469 | goto exit; |
1470 | } | |
1471 | ||
1472 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1473 | if (!err) { |
ba8aebe9 PB |
1474 | u32 offset = TIPC_SKB_CB(buf)->bytes_read; |
1475 | u32 needed; | |
1476 | int sz_to_copy; | |
b97bf3fd | 1477 | |
0232fd0a | 1478 | sz -= offset; |
b97bf3fd | 1479 | needed = (buf_len - sz_copied); |
ba8aebe9 | 1480 | sz_to_copy = min(sz, needed); |
0232fd0a | 1481 | |
10724cc7 | 1482 | res = skb_copy_datagram_msg(buf, hlen + offset, m, sz_to_copy); |
0232fd0a | 1483 | if (res) |
b97bf3fd | 1484 | goto exit; |
0232fd0a | 1485 | |
b97bf3fd PL |
1486 | sz_copied += sz_to_copy; |
1487 | ||
1488 | if (sz_to_copy < sz) { | |
1489 | if (!(flags & MSG_PEEK)) | |
ba8aebe9 PB |
1490 | TIPC_SKB_CB(buf)->bytes_read = |
1491 | offset + sz_to_copy; | |
b97bf3fd PL |
1492 | goto exit; |
1493 | } | |
b97bf3fd PL |
1494 | } else { |
1495 | if (sz_copied != 0) | |
1496 | goto exit; /* can't add error msg to valid data */ | |
1497 | ||
1498 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1499 | res = 0; | |
1500 | else | |
1501 | res = -ECONNRESET; | |
1502 | } | |
1503 | ||
10724cc7 JPM |
1504 | if (unlikely(flags & MSG_PEEK)) |
1505 | goto exit; | |
1506 | ||
1507 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); | |
1508 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1509 | tipc_sk_send_ack(tsk); | |
1510 | tsk_advance_rx_queue(sk); | |
b97bf3fd PL |
1511 | |
1512 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1513 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1514 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1515 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 | 1516 | (!err)) /* and haven't reached a FIN */ |
b97bf3fd PL |
1517 | goto restart; |
1518 | ||
1519 | exit: | |
0c3141e9 | 1520 | release_sock(sk); |
a3b0a5a9 | 1521 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1522 | } |
1523 | ||
f288bef4 YX |
1524 | /** |
1525 | * tipc_write_space - wake up thread if port congestion is released | |
1526 | * @sk: socket | |
1527 | */ | |
1528 | static void tipc_write_space(struct sock *sk) | |
1529 | { | |
1530 | struct socket_wq *wq; | |
1531 | ||
1532 | rcu_read_lock(); | |
1533 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1534 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1535 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1536 | POLLWRNORM | POLLWRBAND); | |
1537 | rcu_read_unlock(); | |
1538 | } | |
1539 | ||
1540 | /** | |
1541 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1542 | * @sk: socket | |
1543 | * @len: the length of messages | |
1544 | */ | |
676d2369 | 1545 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1546 | { |
1547 | struct socket_wq *wq; | |
1548 | ||
1549 | rcu_read_lock(); | |
1550 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1551 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1552 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1553 | POLLRDNORM | POLLRDBAND); | |
1554 | rcu_read_unlock(); | |
1555 | } | |
1556 | ||
f4195d1e YX |
1557 | static void tipc_sock_destruct(struct sock *sk) |
1558 | { | |
1559 | __skb_queue_purge(&sk->sk_receive_queue); | |
1560 | } | |
1561 | ||
7e6c131e YX |
1562 | /** |
1563 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1564 | * @tsk: TIPC socket |
1186adf7 | 1565 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1566 | * |
cda3696d | 1567 | * Returns true if everything ok, false otherwise |
7e6c131e | 1568 | */ |
cda3696d | 1569 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1570 | { |
58ed9442 | 1571 | struct sock *sk = &tsk->sk; |
f2f9800d | 1572 | struct net *net = sock_net(sk); |
cda3696d | 1573 | struct tipc_msg *hdr = buf_msg(skb); |
7e6c131e | 1574 | |
cda3696d JPM |
1575 | if (unlikely(msg_mcast(hdr))) |
1576 | return false; | |
7e6c131e | 1577 | |
99a20889 PB |
1578 | switch (sk->sk_state) { |
1579 | case TIPC_CONNECTING: | |
cda3696d JPM |
1580 | /* Accept only ACK or NACK message */ |
1581 | if (unlikely(!msg_connected(hdr))) | |
1582 | return false; | |
dadebc00 | 1583 | |
cda3696d | 1584 | if (unlikely(msg_errcode(hdr))) { |
9fd4b070 | 1585 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
2c8d8518 | 1586 | sk->sk_err = ECONNREFUSED; |
cda3696d | 1587 | return true; |
584d24b3 YX |
1588 | } |
1589 | ||
cda3696d | 1590 | if (unlikely(!msg_isdata(hdr))) { |
9fd4b070 | 1591 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
dadebc00 | 1592 | sk->sk_err = EINVAL; |
cda3696d | 1593 | return true; |
584d24b3 YX |
1594 | } |
1595 | ||
cda3696d JPM |
1596 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1597 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 | 1598 | |
cda3696d JPM |
1599 | /* If 'ACK+' message, add to socket receive queue */ |
1600 | if (msg_data_sz(hdr)) | |
1601 | return true; | |
1602 | ||
1603 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
1604 | if (waitqueue_active(sk_sleep(sk))) | |
1605 | wake_up_interruptible(sk_sleep(sk)); | |
1606 | ||
1607 | /* 'ACK-' message is neither accepted nor rejected: */ | |
1608 | msg_set_dest_droppable(hdr, 1); | |
1609 | return false; | |
cda3696d | 1610 | |
438adcaf | 1611 | case TIPC_OPEN: |
9fd4b070 | 1612 | case TIPC_DISCONNECTING: |
438adcaf PB |
1613 | break; |
1614 | case TIPC_LISTEN: | |
7e6c131e | 1615 | /* Accept only SYN message */ |
cda3696d JPM |
1616 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
1617 | return true; | |
7e6c131e | 1618 | break; |
f40acbaf PB |
1619 | case TIPC_ESTABLISHED: |
1620 | /* Accept only connection-based messages sent by peer */ | |
1621 | if (unlikely(!tsk_peer_msg(tsk, hdr))) | |
1622 | return false; | |
1623 | ||
1624 | if (unlikely(msg_errcode(hdr))) { | |
1625 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); | |
1626 | /* Let timer expire on it's own */ | |
1627 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
1628 | tsk->portid); | |
1629 | sk->sk_state_change(sk); | |
1630 | } | |
1631 | return true; | |
7e6c131e | 1632 | default: |
438adcaf | 1633 | pr_err("Unknown sk_state %u\n", sk->sk_state); |
7e6c131e | 1634 | } |
438adcaf | 1635 | |
cda3696d | 1636 | return false; |
7e6c131e YX |
1637 | } |
1638 | ||
aba79f33 YX |
1639 | /** |
1640 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1641 | * @sk: socket | |
10724cc7 | 1642 | * @skb: message |
aba79f33 | 1643 | * |
10724cc7 JPM |
1644 | * For connection oriented messages, irrespective of importance, |
1645 | * default queue limit is 2 MB. | |
aba79f33 | 1646 | * |
10724cc7 JPM |
1647 | * For connectionless messages, queue limits are based on message |
1648 | * importance as follows: | |
aba79f33 | 1649 | * |
10724cc7 JPM |
1650 | * TIPC_LOW_IMPORTANCE (2 MB) |
1651 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
1652 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
1653 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
1654 | * |
1655 | * Returns overload limit according to corresponding message importance | |
1656 | */ | |
10724cc7 | 1657 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 1658 | { |
10724cc7 JPM |
1659 | struct tipc_sock *tsk = tipc_sk(sk); |
1660 | struct tipc_msg *hdr = buf_msg(skb); | |
1661 | ||
1662 | if (unlikely(!msg_connected(hdr))) | |
1663 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 1664 | |
10724cc7 JPM |
1665 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
1666 | return sk->sk_rcvbuf; | |
0cee6bbe | 1667 | |
10724cc7 | 1668 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
1669 | } |
1670 | ||
c4307285 | 1671 | /** |
0c3141e9 AS |
1672 | * filter_rcv - validate incoming message |
1673 | * @sk: socket | |
cda3696d | 1674 | * @skb: pointer to message. |
c4307285 | 1675 | * |
0c3141e9 AS |
1676 | * Enqueues message on receive queue if acceptable; optionally handles |
1677 | * disconnect indication for a connected socket. | |
1678 | * | |
1186adf7 | 1679 | * Called with socket lock already taken |
c4307285 | 1680 | * |
cda3696d | 1681 | * Returns true if message was added to socket receive queue, otherwise false |
b97bf3fd | 1682 | */ |
f1d048f2 JPM |
1683 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb, |
1684 | struct sk_buff_head *xmitq) | |
b97bf3fd | 1685 | { |
58ed9442 | 1686 | struct tipc_sock *tsk = tipc_sk(sk); |
cda3696d JPM |
1687 | struct tipc_msg *hdr = buf_msg(skb); |
1688 | unsigned int limit = rcvbuf_limit(sk, skb); | |
1689 | int err = TIPC_OK; | |
1690 | int usr = msg_user(hdr); | |
b97bf3fd | 1691 | |
cda3696d | 1692 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
f1d048f2 | 1693 | tipc_sk_proto_rcv(tsk, skb, xmitq); |
cda3696d | 1694 | return false; |
1186adf7 | 1695 | } |
ec8a2e56 | 1696 | |
cda3696d JPM |
1697 | if (unlikely(usr == SOCK_WAKEUP)) { |
1698 | kfree_skb(skb); | |
50100a5e JPM |
1699 | tsk->link_cong = 0; |
1700 | sk->sk_write_space(sk); | |
cda3696d | 1701 | return false; |
50100a5e JPM |
1702 | } |
1703 | ||
cda3696d JPM |
1704 | /* Drop if illegal message type */ |
1705 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { | |
1706 | kfree_skb(skb); | |
1707 | return false; | |
1708 | } | |
0c3141e9 | 1709 | |
cda3696d | 1710 | /* Reject if wrong message type for current socket state */ |
c752023a | 1711 | if (tipc_sk_type_connectionless(sk)) { |
cda3696d JPM |
1712 | if (msg_connected(hdr)) { |
1713 | err = TIPC_ERR_NO_PORT; | |
1714 | goto reject; | |
1715 | } | |
1716 | } else if (unlikely(!filter_connect(tsk, skb))) { | |
1717 | err = TIPC_ERR_NO_PORT; | |
1718 | goto reject; | |
b97bf3fd PL |
1719 | } |
1720 | ||
1721 | /* Reject message if there isn't room to queue it */ | |
cda3696d JPM |
1722 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
1723 | err = TIPC_ERR_OVERLOAD; | |
1724 | goto reject; | |
1725 | } | |
b97bf3fd | 1726 | |
aba79f33 | 1727 | /* Enqueue message */ |
ba8aebe9 | 1728 | TIPC_SKB_CB(skb)->bytes_read = 0; |
cda3696d JPM |
1729 | __skb_queue_tail(&sk->sk_receive_queue, skb); |
1730 | skb_set_owner_r(skb, sk); | |
0c3141e9 | 1731 | |
676d2369 | 1732 | sk->sk_data_ready(sk); |
cda3696d JPM |
1733 | return true; |
1734 | ||
1735 | reject: | |
f1d048f2 JPM |
1736 | if (tipc_msg_reverse(tsk_own_node(tsk), &skb, err)) |
1737 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1738 | return false; |
0c3141e9 | 1739 | } |
b97bf3fd | 1740 | |
0c3141e9 | 1741 | /** |
4f4482dc | 1742 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1743 | * @sk: socket |
a6ca1094 | 1744 | * @skb: message |
0c3141e9 | 1745 | * |
e3a77561 | 1746 | * Caller must hold socket lock |
0c3141e9 AS |
1747 | * |
1748 | * Returns 0 | |
1749 | */ | |
a6ca1094 | 1750 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1751 | { |
cda3696d | 1752 | unsigned int truesize = skb->truesize; |
f1d048f2 JPM |
1753 | struct sk_buff_head xmitq; |
1754 | u32 dnode, selector; | |
0c3141e9 | 1755 | |
f1d048f2 JPM |
1756 | __skb_queue_head_init(&xmitq); |
1757 | ||
1758 | if (likely(filter_rcv(sk, skb, &xmitq))) { | |
cda3696d | 1759 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); |
f1d048f2 JPM |
1760 | return 0; |
1761 | } | |
1762 | ||
1763 | if (skb_queue_empty(&xmitq)) | |
1764 | return 0; | |
1765 | ||
1766 | /* Send response/rejected message */ | |
1767 | skb = __skb_dequeue(&xmitq); | |
1768 | dnode = msg_destnode(buf_msg(skb)); | |
1769 | selector = msg_origport(buf_msg(skb)); | |
1770 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
0c3141e9 AS |
1771 | return 0; |
1772 | } | |
1773 | ||
d570d864 | 1774 | /** |
c637c103 JPM |
1775 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1776 | * inputq and try adding them to socket or backlog queue | |
1777 | * @inputq: list of incoming buffers with potentially different destinations | |
1778 | * @sk: socket where the buffers should be enqueued | |
1779 | * @dport: port number for the socket | |
d570d864 JPM |
1780 | * |
1781 | * Caller must hold socket lock | |
d570d864 | 1782 | */ |
cda3696d | 1783 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 1784 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 1785 | { |
f1d048f2 JPM |
1786 | unsigned long time_limit = jiffies + 2; |
1787 | struct sk_buff *skb; | |
d570d864 JPM |
1788 | unsigned int lim; |
1789 | atomic_t *dcnt; | |
f1d048f2 | 1790 | u32 onode; |
c637c103 JPM |
1791 | |
1792 | while (skb_queue_len(inputq)) { | |
51a00daf | 1793 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
1794 | return; |
1795 | ||
c637c103 JPM |
1796 | skb = tipc_skb_dequeue(inputq, dport); |
1797 | if (unlikely(!skb)) | |
cda3696d JPM |
1798 | return; |
1799 | ||
1800 | /* Add message directly to receive queue if possible */ | |
c637c103 | 1801 | if (!sock_owned_by_user(sk)) { |
f1d048f2 | 1802 | filter_rcv(sk, skb, xmitq); |
cda3696d | 1803 | continue; |
c637c103 | 1804 | } |
cda3696d JPM |
1805 | |
1806 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 1807 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 1808 | if (!sk->sk_backlog.len) |
c637c103 JPM |
1809 | atomic_set(dcnt, 0); |
1810 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1811 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1812 | continue; | |
cda3696d JPM |
1813 | |
1814 | /* Overload => reject message back to sender */ | |
f1d048f2 JPM |
1815 | onode = tipc_own_addr(sock_net(sk)); |
1816 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) | |
1817 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1818 | break; |
c637c103 | 1819 | } |
d570d864 JPM |
1820 | } |
1821 | ||
0c3141e9 | 1822 | /** |
c637c103 JPM |
1823 | * tipc_sk_rcv - handle a chain of incoming buffers |
1824 | * @inputq: buffer list containing the buffers | |
1825 | * Consumes all buffers in list until inputq is empty | |
1826 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 1827 | */ |
cda3696d | 1828 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1829 | { |
f1d048f2 | 1830 | struct sk_buff_head xmitq; |
c637c103 | 1831 | u32 dnode, dport = 0; |
9871b27f | 1832 | int err; |
9816f061 | 1833 | struct tipc_sock *tsk; |
9816f061 | 1834 | struct sock *sk; |
cda3696d | 1835 | struct sk_buff *skb; |
9816f061 | 1836 | |
f1d048f2 | 1837 | __skb_queue_head_init(&xmitq); |
c637c103 | 1838 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
1839 | dport = tipc_skb_peek_port(inputq, dport); |
1840 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 1841 | |
c637c103 JPM |
1842 | if (likely(tsk)) { |
1843 | sk = &tsk->sk; | |
1844 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 1845 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 1846 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 1847 | } |
f1d048f2 JPM |
1848 | /* Send pending response/rejected messages, if any */ |
1849 | while ((skb = __skb_dequeue(&xmitq))) { | |
1850 | dnode = msg_destnode(buf_msg(skb)); | |
1851 | tipc_node_xmit_skb(net, skb, dnode, dport); | |
1852 | } | |
c637c103 | 1853 | sock_put(sk); |
c637c103 | 1854 | continue; |
c637c103 | 1855 | } |
cda3696d JPM |
1856 | |
1857 | /* No destination socket => dequeue skb if still there */ | |
1858 | skb = tipc_skb_dequeue(inputq, dport); | |
1859 | if (!skb) | |
1860 | return; | |
1861 | ||
1862 | /* Try secondary lookup if unresolved named message */ | |
1863 | err = TIPC_ERR_NO_PORT; | |
1864 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
1865 | goto xmit; | |
1866 | ||
1867 | /* Prepare for message rejection */ | |
1868 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 1869 | continue; |
e3a77561 | 1870 | xmit: |
cda3696d | 1871 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 1872 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 1873 | } |
b97bf3fd PL |
1874 | } |
1875 | ||
78eb3a53 YX |
1876 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1877 | { | |
d9dc8b0f | 1878 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
78eb3a53 | 1879 | struct sock *sk = sock->sk; |
78eb3a53 YX |
1880 | int done; |
1881 | ||
1882 | do { | |
1883 | int err = sock_error(sk); | |
1884 | if (err) | |
1885 | return err; | |
1886 | if (!*timeo_p) | |
1887 | return -ETIMEDOUT; | |
1888 | if (signal_pending(current)) | |
1889 | return sock_intr_errno(*timeo_p); | |
1890 | ||
d9dc8b0f | 1891 | add_wait_queue(sk_sleep(sk), &wait); |
99a20889 | 1892 | done = sk_wait_event(sk, timeo_p, |
d9dc8b0f WC |
1893 | sk->sk_state != TIPC_CONNECTING, &wait); |
1894 | remove_wait_queue(sk_sleep(sk), &wait); | |
78eb3a53 YX |
1895 | } while (!done); |
1896 | return 0; | |
1897 | } | |
1898 | ||
b97bf3fd | 1899 | /** |
247f0f3c | 1900 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1901 | * @sock: socket structure |
1902 | * @dest: socket address for destination port | |
1903 | * @destlen: size of socket address data structure | |
0c3141e9 | 1904 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1905 | * |
1906 | * Returns 0 on success, errno otherwise | |
1907 | */ | |
247f0f3c YX |
1908 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1909 | int destlen, int flags) | |
b97bf3fd | 1910 | { |
0c3141e9 | 1911 | struct sock *sk = sock->sk; |
f2f8036e | 1912 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1913 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1914 | struct msghdr m = {NULL,}; | |
f2f8036e | 1915 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
99a20889 | 1916 | int previous; |
f2f8036e | 1917 | int res = 0; |
b89741a0 | 1918 | |
0c3141e9 AS |
1919 | lock_sock(sk); |
1920 | ||
f2f8036e | 1921 | /* DGRAM/RDM connect(), just save the destaddr */ |
c752023a | 1922 | if (tipc_sk_type_connectionless(sk)) { |
f2f8036e | 1923 | if (dst->family == AF_UNSPEC) { |
aeda16b6 | 1924 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); |
610600c8 SL |
1925 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1926 | res = -EINVAL; | |
f2f8036e | 1927 | } else { |
aeda16b6 | 1928 | memcpy(&tsk->peer, dest, destlen); |
f2f8036e | 1929 | } |
0c3141e9 AS |
1930 | goto exit; |
1931 | } | |
b89741a0 | 1932 | |
b89741a0 AS |
1933 | /* |
1934 | * Reject connection attempt using multicast address | |
1935 | * | |
1936 | * Note: send_msg() validates the rest of the address fields, | |
1937 | * so there's no need to do it here | |
1938 | */ | |
0c3141e9 AS |
1939 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1940 | res = -EINVAL; | |
1941 | goto exit; | |
1942 | } | |
1943 | ||
99a20889 | 1944 | previous = sk->sk_state; |
438adcaf PB |
1945 | |
1946 | switch (sk->sk_state) { | |
1947 | case TIPC_OPEN: | |
584d24b3 YX |
1948 | /* Send a 'SYN-' to destination */ |
1949 | m.msg_name = dest; | |
1950 | m.msg_namelen = destlen; | |
1951 | ||
1952 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1953 | * indicate send_msg() is never blocked. | |
1954 | */ | |
1955 | if (!timeout) | |
1956 | m.msg_flags = MSG_DONTWAIT; | |
1957 | ||
39a0295f | 1958 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1959 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1960 | goto exit; | |
1961 | ||
99a20889 | 1962 | /* Just entered TIPC_CONNECTING state; the only |
584d24b3 YX |
1963 | * difference is that return value in non-blocking |
1964 | * case is EINPROGRESS, rather than EALREADY. | |
1965 | */ | |
1966 | res = -EINPROGRESS; | |
99a20889 PB |
1967 | /* fall thru' */ |
1968 | case TIPC_CONNECTING: | |
1969 | if (!timeout) { | |
1970 | if (previous == TIPC_CONNECTING) | |
1971 | res = -EALREADY; | |
78eb3a53 | 1972 | goto exit; |
99a20889 | 1973 | } |
78eb3a53 YX |
1974 | timeout = msecs_to_jiffies(timeout); |
1975 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1976 | res = tipc_wait_for_connect(sock, &timeout); | |
f40acbaf PB |
1977 | break; |
1978 | case TIPC_ESTABLISHED: | |
584d24b3 | 1979 | res = -EISCONN; |
f40acbaf PB |
1980 | break; |
1981 | default: | |
584d24b3 | 1982 | res = -EINVAL; |
f40acbaf | 1983 | } |
99a20889 | 1984 | |
0c3141e9 AS |
1985 | exit: |
1986 | release_sock(sk); | |
b89741a0 | 1987 | return res; |
b97bf3fd PL |
1988 | } |
1989 | ||
c4307285 | 1990 | /** |
247f0f3c | 1991 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1992 | * @sock: socket structure |
1993 | * @len: (unused) | |
c4307285 | 1994 | * |
b97bf3fd PL |
1995 | * Returns 0 on success, errno otherwise |
1996 | */ | |
247f0f3c | 1997 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1998 | { |
0c3141e9 AS |
1999 | struct sock *sk = sock->sk; |
2000 | int res; | |
2001 | ||
2002 | lock_sock(sk); | |
0c288c86 | 2003 | res = tipc_set_sk_state(sk, TIPC_LISTEN); |
0c3141e9 | 2004 | release_sock(sk); |
0c288c86 | 2005 | |
0c3141e9 | 2006 | return res; |
b97bf3fd PL |
2007 | } |
2008 | ||
6398e23c YX |
2009 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2010 | { | |
2011 | struct sock *sk = sock->sk; | |
2012 | DEFINE_WAIT(wait); | |
2013 | int err; | |
2014 | ||
2015 | /* True wake-one mechanism for incoming connections: only | |
2016 | * one process gets woken up, not the 'whole herd'. | |
2017 | * Since we do not 'race & poll' for established sockets | |
2018 | * anymore, the common case will execute the loop only once. | |
2019 | */ | |
2020 | for (;;) { | |
2021 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2022 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2023 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2024 | release_sock(sk); |
2025 | timeo = schedule_timeout(timeo); | |
2026 | lock_sock(sk); | |
2027 | } | |
2028 | err = 0; | |
2029 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2030 | break; | |
6398e23c YX |
2031 | err = -EAGAIN; |
2032 | if (!timeo) | |
2033 | break; | |
143fe22f EH |
2034 | err = sock_intr_errno(timeo); |
2035 | if (signal_pending(current)) | |
2036 | break; | |
6398e23c YX |
2037 | } |
2038 | finish_wait(sk_sleep(sk), &wait); | |
2039 | return err; | |
2040 | } | |
2041 | ||
c4307285 | 2042 | /** |
247f0f3c | 2043 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2044 | * @sock: listening socket |
2045 | * @newsock: new socket that is to be connected | |
2046 | * @flags: file-related flags associated with socket | |
c4307285 | 2047 | * |
b97bf3fd PL |
2048 | * Returns 0 on success, errno otherwise |
2049 | */ | |
247f0f3c | 2050 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 2051 | { |
0fef8f20 | 2052 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2053 | struct sk_buff *buf; |
301bae56 | 2054 | struct tipc_sock *new_tsock; |
0fef8f20 | 2055 | struct tipc_msg *msg; |
6398e23c | 2056 | long timeo; |
0c3141e9 | 2057 | int res; |
b97bf3fd | 2058 | |
0c3141e9 | 2059 | lock_sock(sk); |
b97bf3fd | 2060 | |
0c288c86 | 2061 | if (sk->sk_state != TIPC_LISTEN) { |
0c3141e9 | 2062 | res = -EINVAL; |
b97bf3fd PL |
2063 | goto exit; |
2064 | } | |
6398e23c YX |
2065 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2066 | res = tipc_wait_for_accept(sock, timeo); | |
2067 | if (res) | |
2068 | goto exit; | |
0c3141e9 AS |
2069 | |
2070 | buf = skb_peek(&sk->sk_receive_queue); | |
2071 | ||
cb5da847 | 2072 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 0); |
0fef8f20 PG |
2073 | if (res) |
2074 | goto exit; | |
fdd75ea8 | 2075 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2076 | |
0fef8f20 | 2077 | new_sk = new_sock->sk; |
301bae56 | 2078 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2079 | msg = buf_msg(buf); |
b97bf3fd | 2080 | |
0fef8f20 PG |
2081 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2082 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2083 | ||
2084 | /* | |
2085 | * Reject any stray messages received by new socket | |
2086 | * before the socket lock was taken (very, very unlikely) | |
2087 | */ | |
2e84c60b | 2088 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2089 | |
2090 | /* Connect new socket to it's peer */ | |
301bae56 | 2091 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 | 2092 | |
301bae56 | 2093 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2094 | if (msg_named(msg)) { |
301bae56 JPM |
2095 | new_tsock->conn_type = msg_nametype(msg); |
2096 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2097 | } |
0fef8f20 PG |
2098 | |
2099 | /* | |
2100 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2101 | * Respond to 'SYN+' by queuing it on new socket. | |
2102 | */ | |
2103 | if (!msg_data_sz(msg)) { | |
2104 | struct msghdr m = {NULL,}; | |
2105 | ||
2e84c60b | 2106 | tsk_advance_rx_queue(sk); |
39a0295f | 2107 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2108 | } else { |
2109 | __skb_dequeue(&sk->sk_receive_queue); | |
2110 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2111 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2112 | } |
2113 | release_sock(new_sk); | |
b97bf3fd | 2114 | exit: |
0c3141e9 | 2115 | release_sock(sk); |
b97bf3fd PL |
2116 | return res; |
2117 | } | |
2118 | ||
2119 | /** | |
247f0f3c | 2120 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2121 | * @sock: socket structure |
e247a8f5 | 2122 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2123 | * |
2124 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2125 | * |
b97bf3fd PL |
2126 | * Returns 0 on success, errno otherwise |
2127 | */ | |
247f0f3c | 2128 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2129 | { |
0c3141e9 | 2130 | struct sock *sk = sock->sk; |
b97bf3fd PL |
2131 | int res; |
2132 | ||
e247a8f5 AS |
2133 | if (how != SHUT_RDWR) |
2134 | return -EINVAL; | |
b97bf3fd | 2135 | |
0c3141e9 | 2136 | lock_sock(sk); |
b97bf3fd | 2137 | |
6f00089c PB |
2138 | __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN); |
2139 | sk->sk_shutdown = SEND_SHUTDOWN; | |
b97bf3fd | 2140 | |
6f00089c | 2141 | if (sk->sk_state == TIPC_DISCONNECTING) { |
75031151 | 2142 | /* Discard any unreceived messages */ |
57467e56 | 2143 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2144 | |
2145 | /* Wake up anyone sleeping in poll */ | |
2146 | sk->sk_state_change(sk); | |
b97bf3fd | 2147 | res = 0; |
6f00089c | 2148 | } else { |
b97bf3fd PL |
2149 | res = -ENOTCONN; |
2150 | } | |
2151 | ||
0c3141e9 | 2152 | release_sock(sk); |
b97bf3fd PL |
2153 | return res; |
2154 | } | |
2155 | ||
f2f2a96a | 2156 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2157 | { |
f2f2a96a YX |
2158 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2159 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2160 | struct sk_buff *skb = NULL; |
57289015 | 2161 | u32 peer_port, peer_node; |
c5898636 | 2162 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2163 | |
6c9808ce | 2164 | bh_lock_sock(sk); |
d6fb7e9c | 2165 | if (!tipc_sk_connected(sk)) { |
6c9808ce JPM |
2166 | bh_unlock_sock(sk); |
2167 | goto exit; | |
57289015 | 2168 | } |
301bae56 JPM |
2169 | peer_port = tsk_peer_port(tsk); |
2170 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2171 | |
8ea642ee | 2172 | if (tsk->probe_unacked) { |
b3be5e3e | 2173 | if (!sock_owned_by_user(sk)) { |
9fd4b070 | 2174 | tipc_set_sk_state(sk, TIPC_DISCONNECTING); |
b3be5e3e EH |
2175 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), |
2176 | tsk_peer_port(tsk)); | |
2177 | sk->sk_state_change(sk); | |
2178 | } else { | |
2179 | /* Try again later */ | |
2180 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2181 | } | |
2182 | ||
360aab6b PB |
2183 | bh_unlock_sock(sk); |
2184 | goto exit; | |
57289015 | 2185 | } |
360aab6b PB |
2186 | |
2187 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, | |
2188 | INT_H_SIZE, 0, peer_node, own_node, | |
2189 | peer_port, tsk->portid, TIPC_OK); | |
8ea642ee | 2190 | tsk->probe_unacked = true; |
360aab6b | 2191 | sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL); |
57289015 | 2192 | bh_unlock_sock(sk); |
a6ca1094 | 2193 | if (skb) |
af9b028e | 2194 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2195 | exit: |
07f6c4bc | 2196 | sock_put(sk); |
57289015 JPM |
2197 | } |
2198 | ||
301bae56 | 2199 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2200 | struct tipc_name_seq const *seq) |
2201 | { | |
d6fb7e9c PB |
2202 | struct sock *sk = &tsk->sk; |
2203 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2204 | struct publication *publ; |
2205 | u32 key; | |
2206 | ||
d6fb7e9c | 2207 | if (tipc_sk_connected(sk)) |
0fc87aae | 2208 | return -EINVAL; |
07f6c4bc YX |
2209 | key = tsk->portid + tsk->pub_count + 1; |
2210 | if (key == tsk->portid) | |
0fc87aae JPM |
2211 | return -EADDRINUSE; |
2212 | ||
f2f9800d | 2213 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2214 | scope, tsk->portid, key); |
0fc87aae JPM |
2215 | if (unlikely(!publ)) |
2216 | return -EINVAL; | |
2217 | ||
301bae56 JPM |
2218 | list_add(&publ->pport_list, &tsk->publications); |
2219 | tsk->pub_count++; | |
2220 | tsk->published = 1; | |
0fc87aae JPM |
2221 | return 0; |
2222 | } | |
2223 | ||
301bae56 | 2224 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2225 | struct tipc_name_seq const *seq) |
2226 | { | |
f2f9800d | 2227 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2228 | struct publication *publ; |
2229 | struct publication *safe; | |
2230 | int rc = -EINVAL; | |
2231 | ||
301bae56 | 2232 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2233 | if (seq) { |
2234 | if (publ->scope != scope) | |
2235 | continue; | |
2236 | if (publ->type != seq->type) | |
2237 | continue; | |
2238 | if (publ->lower != seq->lower) | |
2239 | continue; | |
2240 | if (publ->upper != seq->upper) | |
2241 | break; | |
f2f9800d | 2242 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2243 | publ->ref, publ->key); |
2244 | rc = 0; | |
2245 | break; | |
2246 | } | |
f2f9800d | 2247 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2248 | publ->ref, publ->key); |
2249 | rc = 0; | |
2250 | } | |
301bae56 JPM |
2251 | if (list_empty(&tsk->publications)) |
2252 | tsk->published = 0; | |
0fc87aae JPM |
2253 | return rc; |
2254 | } | |
2255 | ||
5a9ee0be JPM |
2256 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2257 | * when we go from standalone to network mode. | |
2258 | */ | |
e05b31f4 | 2259 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2260 | { |
e05b31f4 | 2261 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2262 | const struct bucket_table *tbl; |
2263 | struct rhash_head *pos; | |
2264 | struct tipc_sock *tsk; | |
5a9ee0be | 2265 | struct tipc_msg *msg; |
07f6c4bc | 2266 | int i; |
5a9ee0be | 2267 | |
07f6c4bc | 2268 | rcu_read_lock(); |
e05b31f4 | 2269 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2270 | for (i = 0; i < tbl->size; i++) { |
2271 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2272 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2273 | msg = &tsk->phdr; | |
34747539 YX |
2274 | msg_set_prevnode(msg, tn->own_addr); |
2275 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2276 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2277 | } | |
5a9ee0be | 2278 | } |
07f6c4bc | 2279 | rcu_read_unlock(); |
5a9ee0be JPM |
2280 | } |
2281 | ||
e05b31f4 | 2282 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2283 | { |
e05b31f4 | 2284 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2285 | struct tipc_sock *tsk; |
808d90f9 | 2286 | |
07f6c4bc | 2287 | rcu_read_lock(); |
6cca7289 | 2288 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2289 | if (tsk) |
2290 | sock_hold(&tsk->sk); | |
2291 | rcu_read_unlock(); | |
808d90f9 | 2292 | |
07f6c4bc | 2293 | return tsk; |
808d90f9 JPM |
2294 | } |
2295 | ||
07f6c4bc | 2296 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2297 | { |
e05b31f4 YX |
2298 | struct sock *sk = &tsk->sk; |
2299 | struct net *net = sock_net(sk); | |
2300 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2301 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2302 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2303 | |
07f6c4bc YX |
2304 | while (remaining--) { |
2305 | portid++; | |
2306 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2307 | portid = TIPC_MIN_PORT; | |
2308 | tsk->portid = portid; | |
2309 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2310 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2311 | tsk_rht_params)) | |
07f6c4bc YX |
2312 | return 0; |
2313 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2314 | } |
2315 | ||
07f6c4bc | 2316 | return -1; |
808d90f9 JPM |
2317 | } |
2318 | ||
07f6c4bc | 2319 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2320 | { |
07f6c4bc | 2321 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2322 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2323 | |
6cca7289 | 2324 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2325 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2326 | __sock_put(sk); | |
808d90f9 | 2327 | } |
808d90f9 JPM |
2328 | } |
2329 | ||
6cca7289 HX |
2330 | static const struct rhashtable_params tsk_rht_params = { |
2331 | .nelem_hint = 192, | |
2332 | .head_offset = offsetof(struct tipc_sock, node), | |
2333 | .key_offset = offsetof(struct tipc_sock, portid), | |
2334 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2335 | .max_size = 1048576, |
2336 | .min_size = 256, | |
b5e2c150 | 2337 | .automatic_shrinking = true, |
6cca7289 HX |
2338 | }; |
2339 | ||
e05b31f4 | 2340 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2341 | { |
e05b31f4 | 2342 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2343 | |
2344 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2345 | } |
2346 | ||
e05b31f4 | 2347 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2348 | { |
e05b31f4 YX |
2349 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2350 | ||
07f6c4bc YX |
2351 | /* Wait for socket readers to complete */ |
2352 | synchronize_net(); | |
808d90f9 | 2353 | |
e05b31f4 | 2354 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2355 | } |
2356 | ||
b97bf3fd | 2357 | /** |
247f0f3c | 2358 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2359 | * @sock: socket structure |
2360 | * @lvl: option level | |
2361 | * @opt: option identifier | |
2362 | * @ov: pointer to new option value | |
2363 | * @ol: length of option value | |
c4307285 YH |
2364 | * |
2365 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2366 | * (to ease compatibility). |
c4307285 | 2367 | * |
b97bf3fd PL |
2368 | * Returns 0 on success, errno otherwise |
2369 | */ | |
247f0f3c YX |
2370 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2371 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2372 | { |
0c3141e9 | 2373 | struct sock *sk = sock->sk; |
58ed9442 | 2374 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2375 | u32 value; |
2376 | int res; | |
2377 | ||
c4307285 YH |
2378 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2379 | return 0; | |
b97bf3fd PL |
2380 | if (lvl != SOL_TIPC) |
2381 | return -ENOPROTOOPT; | |
2382 | if (ol < sizeof(value)) | |
2383 | return -EINVAL; | |
2db9983a AS |
2384 | res = get_user(value, (u32 __user *)ov); |
2385 | if (res) | |
b97bf3fd PL |
2386 | return res; |
2387 | ||
0c3141e9 | 2388 | lock_sock(sk); |
c4307285 | 2389 | |
b97bf3fd PL |
2390 | switch (opt) { |
2391 | case TIPC_IMPORTANCE: | |
301bae56 | 2392 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2393 | break; |
2394 | case TIPC_SRC_DROPPABLE: | |
2395 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2396 | tsk_set_unreliable(tsk, value); |
c4307285 | 2397 | else |
b97bf3fd PL |
2398 | res = -ENOPROTOOPT; |
2399 | break; | |
2400 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2401 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2402 | break; |
2403 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2404 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2405 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2406 | break; |
2407 | default: | |
2408 | res = -EINVAL; | |
2409 | } | |
2410 | ||
0c3141e9 AS |
2411 | release_sock(sk); |
2412 | ||
b97bf3fd PL |
2413 | return res; |
2414 | } | |
2415 | ||
2416 | /** | |
247f0f3c | 2417 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2418 | * @sock: socket structure |
2419 | * @lvl: option level | |
2420 | * @opt: option identifier | |
2421 | * @ov: receptacle for option value | |
2422 | * @ol: receptacle for length of option value | |
c4307285 YH |
2423 | * |
2424 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2425 | * (to ease compatibility). |
c4307285 | 2426 | * |
b97bf3fd PL |
2427 | * Returns 0 on success, errno otherwise |
2428 | */ | |
247f0f3c YX |
2429 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2430 | char __user *ov, int __user *ol) | |
b97bf3fd | 2431 | { |
0c3141e9 | 2432 | struct sock *sk = sock->sk; |
58ed9442 | 2433 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2434 | int len; |
b97bf3fd | 2435 | u32 value; |
c4307285 | 2436 | int res; |
b97bf3fd | 2437 | |
c4307285 YH |
2438 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2439 | return put_user(0, ol); | |
b97bf3fd PL |
2440 | if (lvl != SOL_TIPC) |
2441 | return -ENOPROTOOPT; | |
2db9983a AS |
2442 | res = get_user(len, ol); |
2443 | if (res) | |
c4307285 | 2444 | return res; |
b97bf3fd | 2445 | |
0c3141e9 | 2446 | lock_sock(sk); |
b97bf3fd PL |
2447 | |
2448 | switch (opt) { | |
2449 | case TIPC_IMPORTANCE: | |
301bae56 | 2450 | value = tsk_importance(tsk); |
b97bf3fd PL |
2451 | break; |
2452 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2453 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2454 | break; |
2455 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2456 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2457 | break; |
2458 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2459 | value = tsk->conn_timeout; |
0c3141e9 | 2460 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2461 | break; |
0e65967e | 2462 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2463 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2464 | break; |
0e65967e | 2465 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2466 | value = skb_queue_len(&sk->sk_receive_queue); |
2467 | break; | |
b97bf3fd PL |
2468 | default: |
2469 | res = -EINVAL; | |
2470 | } | |
2471 | ||
0c3141e9 AS |
2472 | release_sock(sk); |
2473 | ||
25860c3b PG |
2474 | if (res) |
2475 | return res; /* "get" failed */ | |
b97bf3fd | 2476 | |
25860c3b PG |
2477 | if (len < sizeof(value)) |
2478 | return -EINVAL; | |
2479 | ||
2480 | if (copy_to_user(ov, &value, sizeof(value))) | |
2481 | return -EFAULT; | |
2482 | ||
2483 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2484 | } |
2485 | ||
f2f9800d | 2486 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2487 | { |
f2f9800d | 2488 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2489 | struct tipc_sioc_ln_req lnr; |
2490 | void __user *argp = (void __user *)arg; | |
2491 | ||
2492 | switch (cmd) { | |
2493 | case SIOCGETLINKNAME: | |
2494 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2495 | return -EFAULT; | |
f2f9800d YX |
2496 | if (!tipc_node_get_linkname(sock_net(sk), |
2497 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2498 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2499 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2500 | return -EFAULT; | |
2501 | return 0; | |
2502 | } | |
2503 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2504 | default: |
2505 | return -ENOIOCTLCMD; | |
2506 | } | |
2507 | } | |
2508 | ||
ae86b9e3 BH |
2509 | /* Protocol switches for the various types of TIPC sockets */ |
2510 | ||
bca65eae | 2511 | static const struct proto_ops msg_ops = { |
0e65967e | 2512 | .owner = THIS_MODULE, |
b97bf3fd | 2513 | .family = AF_TIPC, |
247f0f3c YX |
2514 | .release = tipc_release, |
2515 | .bind = tipc_bind, | |
2516 | .connect = tipc_connect, | |
5eee6a6d | 2517 | .socketpair = sock_no_socketpair, |
245f3d34 | 2518 | .accept = sock_no_accept, |
247f0f3c YX |
2519 | .getname = tipc_getname, |
2520 | .poll = tipc_poll, | |
78acb1f9 | 2521 | .ioctl = tipc_ioctl, |
245f3d34 | 2522 | .listen = sock_no_listen, |
247f0f3c YX |
2523 | .shutdown = tipc_shutdown, |
2524 | .setsockopt = tipc_setsockopt, | |
2525 | .getsockopt = tipc_getsockopt, | |
2526 | .sendmsg = tipc_sendmsg, | |
2527 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2528 | .mmap = sock_no_mmap, |
2529 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2530 | }; |
2531 | ||
bca65eae | 2532 | static const struct proto_ops packet_ops = { |
0e65967e | 2533 | .owner = THIS_MODULE, |
b97bf3fd | 2534 | .family = AF_TIPC, |
247f0f3c YX |
2535 | .release = tipc_release, |
2536 | .bind = tipc_bind, | |
2537 | .connect = tipc_connect, | |
5eee6a6d | 2538 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2539 | .accept = tipc_accept, |
2540 | .getname = tipc_getname, | |
2541 | .poll = tipc_poll, | |
78acb1f9 | 2542 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2543 | .listen = tipc_listen, |
2544 | .shutdown = tipc_shutdown, | |
2545 | .setsockopt = tipc_setsockopt, | |
2546 | .getsockopt = tipc_getsockopt, | |
2547 | .sendmsg = tipc_send_packet, | |
2548 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2549 | .mmap = sock_no_mmap, |
2550 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2551 | }; |
2552 | ||
bca65eae | 2553 | static const struct proto_ops stream_ops = { |
0e65967e | 2554 | .owner = THIS_MODULE, |
b97bf3fd | 2555 | .family = AF_TIPC, |
247f0f3c YX |
2556 | .release = tipc_release, |
2557 | .bind = tipc_bind, | |
2558 | .connect = tipc_connect, | |
5eee6a6d | 2559 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2560 | .accept = tipc_accept, |
2561 | .getname = tipc_getname, | |
2562 | .poll = tipc_poll, | |
78acb1f9 | 2563 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2564 | .listen = tipc_listen, |
2565 | .shutdown = tipc_shutdown, | |
2566 | .setsockopt = tipc_setsockopt, | |
2567 | .getsockopt = tipc_getsockopt, | |
2568 | .sendmsg = tipc_send_stream, | |
2569 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2570 | .mmap = sock_no_mmap, |
2571 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2572 | }; |
2573 | ||
bca65eae | 2574 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2575 | .owner = THIS_MODULE, |
b97bf3fd | 2576 | .family = AF_TIPC, |
c5fa7b3c | 2577 | .create = tipc_sk_create |
b97bf3fd PL |
2578 | }; |
2579 | ||
2580 | static struct proto tipc_proto = { | |
2581 | .name = "TIPC", | |
2582 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2583 | .obj_size = sizeof(struct tipc_sock), |
2584 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2585 | }; |
2586 | ||
2587 | /** | |
4323add6 | 2588 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2589 | * |
b97bf3fd PL |
2590 | * Returns 0 on success, errno otherwise |
2591 | */ | |
4323add6 | 2592 | int tipc_socket_init(void) |
b97bf3fd PL |
2593 | { |
2594 | int res; | |
2595 | ||
c4307285 | 2596 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2597 | if (res) { |
2cf8aa19 | 2598 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2599 | goto out; |
2600 | } | |
2601 | ||
2602 | res = sock_register(&tipc_family_ops); | |
2603 | if (res) { | |
2cf8aa19 | 2604 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2605 | proto_unregister(&tipc_proto); |
2606 | goto out; | |
2607 | } | |
b97bf3fd PL |
2608 | out: |
2609 | return res; | |
2610 | } | |
2611 | ||
2612 | /** | |
4323add6 | 2613 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2614 | */ |
4323add6 | 2615 | void tipc_socket_stop(void) |
b97bf3fd | 2616 | { |
b97bf3fd PL |
2617 | sock_unregister(tipc_family_ops.family); |
2618 | proto_unregister(&tipc_proto); | |
2619 | } | |
34b78a12 RA |
2620 | |
2621 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2622 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2623 | { |
2624 | u32 peer_node; | |
2625 | u32 peer_port; | |
2626 | struct nlattr *nest; | |
2627 | ||
2628 | peer_node = tsk_peer_node(tsk); | |
2629 | peer_port = tsk_peer_port(tsk); | |
2630 | ||
2631 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2632 | ||
2633 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2634 | goto msg_full; | |
2635 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2636 | goto msg_full; | |
2637 | ||
2638 | if (tsk->conn_type != 0) { | |
2639 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2640 | goto msg_full; | |
2641 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2642 | goto msg_full; | |
2643 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2644 | goto msg_full; | |
2645 | } | |
2646 | nla_nest_end(skb, nest); | |
2647 | ||
2648 | return 0; | |
2649 | ||
2650 | msg_full: | |
2651 | nla_nest_cancel(skb, nest); | |
2652 | ||
2653 | return -EMSGSIZE; | |
2654 | } | |
2655 | ||
2656 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2657 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2658 | struct tipc_sock *tsk) | |
34b78a12 RA |
2659 | { |
2660 | int err; | |
2661 | void *hdr; | |
2662 | struct nlattr *attrs; | |
34747539 YX |
2663 | struct net *net = sock_net(skb->sk); |
2664 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6fb7e9c | 2665 | struct sock *sk = &tsk->sk; |
34b78a12 RA |
2666 | |
2667 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2668 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2669 | if (!hdr) |
2670 | goto msg_cancel; | |
2671 | ||
2672 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2673 | if (!attrs) | |
2674 | goto genlmsg_cancel; | |
07f6c4bc | 2675 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2676 | goto attr_msg_cancel; |
34747539 | 2677 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2678 | goto attr_msg_cancel; |
2679 | ||
d6fb7e9c | 2680 | if (tipc_sk_connected(sk)) { |
34b78a12 RA |
2681 | err = __tipc_nl_add_sk_con(skb, tsk); |
2682 | if (err) | |
2683 | goto attr_msg_cancel; | |
2684 | } else if (!list_empty(&tsk->publications)) { | |
2685 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2686 | goto attr_msg_cancel; | |
2687 | } | |
2688 | nla_nest_end(skb, attrs); | |
2689 | genlmsg_end(skb, hdr); | |
2690 | ||
2691 | return 0; | |
2692 | ||
2693 | attr_msg_cancel: | |
2694 | nla_nest_cancel(skb, attrs); | |
2695 | genlmsg_cancel: | |
2696 | genlmsg_cancel(skb, hdr); | |
2697 | msg_cancel: | |
2698 | return -EMSGSIZE; | |
2699 | } | |
2700 | ||
2701 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2702 | { | |
2703 | int err; | |
2704 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2705 | const struct bucket_table *tbl; |
2706 | struct rhash_head *pos; | |
e05b31f4 YX |
2707 | struct net *net = sock_net(skb->sk); |
2708 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2709 | u32 tbl_id = cb->args[0]; |
2710 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2711 | |
07f6c4bc | 2712 | rcu_read_lock(); |
e05b31f4 | 2713 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2714 | for (; tbl_id < tbl->size; tbl_id++) { |
2715 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2716 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2717 | if (prev_portid && prev_portid != tsk->portid) { |
2718 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2719 | continue; | |
2720 | } | |
2721 | ||
07f6c4bc | 2722 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2723 | if (err) { |
2724 | prev_portid = tsk->portid; | |
2725 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2726 | goto out; | |
2727 | } | |
2728 | prev_portid = 0; | |
07f6c4bc | 2729 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2730 | } |
34b78a12 | 2731 | } |
d6e164e3 | 2732 | out: |
07f6c4bc | 2733 | rcu_read_unlock(); |
d6e164e3 RA |
2734 | cb->args[0] = tbl_id; |
2735 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2736 | |
2737 | return skb->len; | |
2738 | } | |
1a1a143d RA |
2739 | |
2740 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2741 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2742 | struct netlink_callback *cb, | |
2743 | struct publication *publ) | |
1a1a143d RA |
2744 | { |
2745 | void *hdr; | |
2746 | struct nlattr *attrs; | |
2747 | ||
2748 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2749 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2750 | if (!hdr) |
2751 | goto msg_cancel; | |
2752 | ||
2753 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2754 | if (!attrs) | |
2755 | goto genlmsg_cancel; | |
2756 | ||
2757 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2758 | goto attr_msg_cancel; | |
2759 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2760 | goto attr_msg_cancel; | |
2761 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2762 | goto attr_msg_cancel; | |
2763 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2764 | goto attr_msg_cancel; | |
2765 | ||
2766 | nla_nest_end(skb, attrs); | |
2767 | genlmsg_end(skb, hdr); | |
2768 | ||
2769 | return 0; | |
2770 | ||
2771 | attr_msg_cancel: | |
2772 | nla_nest_cancel(skb, attrs); | |
2773 | genlmsg_cancel: | |
2774 | genlmsg_cancel(skb, hdr); | |
2775 | msg_cancel: | |
2776 | return -EMSGSIZE; | |
2777 | } | |
2778 | ||
2779 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2780 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2781 | struct netlink_callback *cb, | |
2782 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2783 | { |
2784 | int err; | |
2785 | struct publication *p; | |
2786 | ||
2787 | if (*last_publ) { | |
2788 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2789 | if (p->key == *last_publ) | |
2790 | break; | |
2791 | } | |
2792 | if (p->key != *last_publ) { | |
2793 | /* We never set seq or call nl_dump_check_consistent() | |
2794 | * this means that setting prev_seq here will cause the | |
2795 | * consistence check to fail in the netlink callback | |
2796 | * handler. Resulting in the last NLMSG_DONE message | |
2797 | * having the NLM_F_DUMP_INTR flag set. | |
2798 | */ | |
2799 | cb->prev_seq = 1; | |
2800 | *last_publ = 0; | |
2801 | return -EPIPE; | |
2802 | } | |
2803 | } else { | |
2804 | p = list_first_entry(&tsk->publications, struct publication, | |
2805 | pport_list); | |
2806 | } | |
2807 | ||
2808 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2809 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2810 | if (err) { | |
2811 | *last_publ = p->key; | |
2812 | return err; | |
2813 | } | |
2814 | } | |
2815 | *last_publ = 0; | |
2816 | ||
2817 | return 0; | |
2818 | } | |
2819 | ||
2820 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2821 | { | |
2822 | int err; | |
07f6c4bc | 2823 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2824 | u32 last_publ = cb->args[1]; |
2825 | u32 done = cb->args[2]; | |
e05b31f4 | 2826 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2827 | struct tipc_sock *tsk; |
2828 | ||
07f6c4bc | 2829 | if (!tsk_portid) { |
1a1a143d RA |
2830 | struct nlattr **attrs; |
2831 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2832 | ||
2833 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2834 | if (err) | |
2835 | return err; | |
2836 | ||
45e093ae RA |
2837 | if (!attrs[TIPC_NLA_SOCK]) |
2838 | return -EINVAL; | |
2839 | ||
1a1a143d RA |
2840 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
2841 | attrs[TIPC_NLA_SOCK], | |
2842 | tipc_nl_sock_policy); | |
2843 | if (err) | |
2844 | return err; | |
2845 | ||
2846 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2847 | return -EINVAL; | |
2848 | ||
07f6c4bc | 2849 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2850 | } |
2851 | ||
2852 | if (done) | |
2853 | return 0; | |
2854 | ||
e05b31f4 | 2855 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2856 | if (!tsk) |
2857 | return -EINVAL; | |
2858 | ||
2859 | lock_sock(&tsk->sk); | |
2860 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2861 | if (!err) | |
2862 | done = 1; | |
2863 | release_sock(&tsk->sk); | |
07f6c4bc | 2864 | sock_put(&tsk->sk); |
1a1a143d | 2865 | |
07f6c4bc | 2866 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2867 | cb->args[1] = last_publ; |
2868 | cb->args[2] = done; | |
2869 | ||
2870 | return skb->len; | |
2871 | } |