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Commit | Line | Data |
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b97bf3fd | 1 | /* |
02c00c2a | 2 | * net/tipc/socket.c: TIPC socket API |
c4307285 | 3 | * |
3c724acd | 4 | * Copyright (c) 2001-2007, 2012-2015, 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 YX |
47 | #define SS_LISTENING -1 /* socket is listening */ |
48 | #define SS_READY -2 /* socket is connectionless */ | |
b97bf3fd | 49 | |
07f6c4bc | 50 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
2f55c437 | 51 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc YX |
52 | #define TIPC_FWD_MSG 1 |
53 | #define TIPC_CONN_OK 0 | |
54 | #define TIPC_CONN_PROBING 1 | |
55 | #define TIPC_MAX_PORT 0xffffffff | |
56 | #define TIPC_MIN_PORT 1 | |
301bae56 JPM |
57 | |
58 | /** | |
59 | * struct tipc_sock - TIPC socket structure | |
60 | * @sk: socket - interacts with 'port' and with user via the socket API | |
301bae56 JPM |
61 | * @conn_type: TIPC type used when connection was established |
62 | * @conn_instance: TIPC instance used when connection was established | |
63 | * @published: non-zero if port has one or more associated names | |
64 | * @max_pkt: maximum packet size "hint" used when building messages sent by port | |
07f6c4bc | 65 | * @portid: unique port identity in TIPC socket hash table |
301bae56 | 66 | * @phdr: preformatted message header used when sending messages |
301bae56 JPM |
67 | * @publications: list of publications for port |
68 | * @pub_count: total # of publications port has made during its lifetime | |
69 | * @probing_state: | |
2f55c437 | 70 | * @probing_intv: |
301bae56 JPM |
71 | * @conn_timeout: the time we can wait for an unresponded setup request |
72 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
73 | * @link_cong: non-zero if owner must sleep because of link congestion | |
74 | * @sent_unacked: # messages sent by socket, and not yet acked by peer | |
75 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
aeda16b6 | 76 | * @peer: 'connected' peer for dgram/rdm |
07f6c4bc YX |
77 | * @node: hash table node |
78 | * @rcu: rcu struct for tipc_sock | |
301bae56 JPM |
79 | */ |
80 | struct tipc_sock { | |
81 | struct sock sk; | |
301bae56 JPM |
82 | u32 conn_type; |
83 | u32 conn_instance; | |
84 | int published; | |
85 | u32 max_pkt; | |
07f6c4bc | 86 | u32 portid; |
301bae56 JPM |
87 | struct tipc_msg phdr; |
88 | struct list_head sock_list; | |
89 | struct list_head publications; | |
90 | u32 pub_count; | |
91 | u32 probing_state; | |
2f55c437 | 92 | unsigned long probing_intv; |
301bae56 JPM |
93 | uint conn_timeout; |
94 | atomic_t dupl_rcvcnt; | |
95 | bool link_cong; | |
10724cc7 JPM |
96 | u16 snt_unacked; |
97 | u16 snd_win; | |
60020e18 | 98 | u16 peer_caps; |
10724cc7 JPM |
99 | u16 rcv_unacked; |
100 | u16 rcv_win; | |
aeda16b6 | 101 | struct sockaddr_tipc peer; |
07f6c4bc YX |
102 | struct rhash_head node; |
103 | struct rcu_head rcu; | |
301bae56 | 104 | }; |
b97bf3fd | 105 | |
4f4482dc | 106 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 107 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 108 | static void tipc_write_space(struct sock *sk); |
f4195d1e | 109 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c YX |
110 | static int tipc_release(struct socket *sock); |
111 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 112 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
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 PL |
128 | static struct proto tipc_proto; |
129 | ||
6cca7289 HX |
130 | static const struct rhashtable_params tsk_rht_params; |
131 | ||
c4307285 | 132 | /* |
0c3141e9 AS |
133 | * Revised TIPC socket locking policy: |
134 | * | |
135 | * Most socket operations take the standard socket lock when they start | |
136 | * and hold it until they finish (or until they need to sleep). Acquiring | |
137 | * this lock grants the owner exclusive access to the fields of the socket | |
138 | * data structures, with the exception of the backlog queue. A few socket | |
139 | * operations can be done without taking the socket lock because they only | |
140 | * read socket information that never changes during the life of the socket. | |
141 | * | |
142 | * Socket operations may acquire the lock for the associated TIPC port if they | |
143 | * need to perform an operation on the port. If any routine needs to acquire | |
144 | * both the socket lock and the port lock it must take the socket lock first | |
145 | * to avoid the risk of deadlock. | |
146 | * | |
147 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
148 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
149 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
150 | * and either handles the message itself or adds it to the socket's backlog | |
151 | * queue; in the latter case the queued message is processed once the process | |
152 | * owning the socket lock releases it. | |
153 | * | |
154 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
155 | * the problem of a blocked socket operation preventing any other operations | |
156 | * from occurring. However, applications must be careful if they have | |
157 | * multiple threads trying to send (or receive) on the same socket, as these | |
158 | * operations might interfere with each other. For example, doing a connect | |
159 | * and a receive at the same time might allow the receive to consume the | |
160 | * ACK message meant for the connect. While additional work could be done | |
161 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
162 | * | |
163 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
164 | * that another operation that must be performed in a non-blocking manner is | |
165 | * not delayed for very long because the lock has already been taken. | |
166 | * | |
167 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
168 | * constant over its lifetime; such fields can be examined without taking | |
169 | * the socket lock and/or port lock, and do not need to be re-read even | |
170 | * after resuming processing after waiting. These fields include: | |
171 | * - socket type | |
172 | * - pointer to socket sk structure (aka tipc_sock structure) | |
173 | * - pointer to port structure | |
174 | * - port reference | |
175 | */ | |
176 | ||
c5898636 JPM |
177 | static u32 tsk_own_node(struct tipc_sock *tsk) |
178 | { | |
179 | return msg_prevnode(&tsk->phdr); | |
180 | } | |
181 | ||
301bae56 | 182 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 183 | { |
301bae56 | 184 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
185 | } |
186 | ||
301bae56 | 187 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 188 | { |
301bae56 | 189 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
190 | } |
191 | ||
301bae56 | 192 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 193 | { |
301bae56 | 194 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
195 | } |
196 | ||
301bae56 | 197 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 198 | { |
301bae56 | 199 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
200 | } |
201 | ||
301bae56 | 202 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 203 | { |
301bae56 | 204 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
205 | } |
206 | ||
301bae56 | 207 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 208 | { |
301bae56 | 209 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
210 | } |
211 | ||
301bae56 | 212 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 213 | { |
301bae56 | 214 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
215 | } |
216 | ||
301bae56 | 217 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
218 | { |
219 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
220 | return -EINVAL; | |
301bae56 | 221 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
222 | return 0; |
223 | } | |
8826cde6 | 224 | |
301bae56 JPM |
225 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
226 | { | |
227 | return container_of(sk, struct tipc_sock, sk); | |
228 | } | |
229 | ||
10724cc7 | 230 | static bool tsk_conn_cong(struct tipc_sock *tsk) |
301bae56 | 231 | { |
10724cc7 JPM |
232 | return tsk->snt_unacked >= tsk->snd_win; |
233 | } | |
234 | ||
235 | /* tsk_blocks(): translate a buffer size in bytes to number of | |
236 | * advertisable blocks, taking into account the ratio truesize(len)/len | |
237 | * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ | |
238 | */ | |
239 | static u16 tsk_adv_blocks(int len) | |
240 | { | |
241 | return len / FLOWCTL_BLK_SZ / 4; | |
242 | } | |
243 | ||
244 | /* tsk_inc(): increment counter for sent or received data | |
245 | * - If block based flow control is not supported by peer we | |
246 | * fall back to message based ditto, incrementing the counter | |
247 | */ | |
248 | static u16 tsk_inc(struct tipc_sock *tsk, int msglen) | |
249 | { | |
250 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) | |
251 | return ((msglen / FLOWCTL_BLK_SZ) + 1); | |
252 | return 1; | |
301bae56 JPM |
253 | } |
254 | ||
0c3141e9 | 255 | /** |
2e84c60b | 256 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
257 | * |
258 | * Caller must hold socket lock | |
b97bf3fd | 259 | */ |
2e84c60b | 260 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 261 | { |
5f6d9123 | 262 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
263 | } |
264 | ||
bcd3ffd4 JPM |
265 | /* tipc_sk_respond() : send response message back to sender |
266 | */ | |
267 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
268 | { | |
269 | u32 selector; | |
270 | u32 dnode; | |
271 | u32 onode = tipc_own_addr(sock_net(sk)); | |
272 | ||
273 | if (!tipc_msg_reverse(onode, &skb, err)) | |
274 | return; | |
275 | ||
276 | dnode = msg_destnode(buf_msg(skb)); | |
277 | selector = msg_origport(buf_msg(skb)); | |
278 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
279 | } | |
280 | ||
b97bf3fd | 281 | /** |
2e84c60b | 282 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
283 | * |
284 | * Caller must hold socket lock | |
b97bf3fd | 285 | */ |
2e84c60b | 286 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 287 | { |
a6ca1094 | 288 | struct sk_buff *skb; |
0c3141e9 | 289 | |
bcd3ffd4 JPM |
290 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
291 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
292 | } |
293 | ||
d6fb7e9c PB |
294 | static bool tipc_sk_connected(struct sock *sk) |
295 | { | |
296 | return sk->sk_socket->state == SS_CONNECTED; | |
297 | } | |
298 | ||
2e84c60b | 299 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
300 | * |
301 | * Handles cases where the node's network address has changed from | |
302 | * the default of <0.0.0> to its configured setting. | |
303 | */ | |
2e84c60b | 304 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 305 | { |
d6fb7e9c PB |
306 | struct sock *sk = &tsk->sk; |
307 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); | |
301bae56 | 308 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
309 | u32 orig_node; |
310 | u32 peer_node; | |
311 | ||
d6fb7e9c | 312 | if (unlikely(!tipc_sk_connected(sk))) |
0fc87aae JPM |
313 | return false; |
314 | ||
315 | if (unlikely(msg_origport(msg) != peer_port)) | |
316 | return false; | |
317 | ||
318 | orig_node = msg_orignode(msg); | |
301bae56 | 319 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
320 | |
321 | if (likely(orig_node == peer_node)) | |
322 | return true; | |
323 | ||
34747539 | 324 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
325 | return true; |
326 | ||
34747539 | 327 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
328 | return true; |
329 | ||
330 | return false; | |
331 | } | |
332 | ||
b97bf3fd | 333 | /** |
c5fa7b3c | 334 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 335 | * @net: network namespace (must be default network) |
b97bf3fd PL |
336 | * @sock: pre-allocated socket structure |
337 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 338 | * @kern: caused by kernel or by userspace? |
c4307285 | 339 | * |
0c3141e9 AS |
340 | * This routine creates additional data structures used by the TIPC socket, |
341 | * initializes them, and links them together. | |
b97bf3fd PL |
342 | * |
343 | * Returns 0 on success, errno otherwise | |
344 | */ | |
58ed9442 JPM |
345 | static int tipc_sk_create(struct net *net, struct socket *sock, |
346 | int protocol, int kern) | |
b97bf3fd | 347 | { |
c5898636 | 348 | struct tipc_net *tn; |
0c3141e9 AS |
349 | const struct proto_ops *ops; |
350 | socket_state state; | |
b97bf3fd | 351 | struct sock *sk; |
58ed9442 | 352 | struct tipc_sock *tsk; |
5b8fa7ce | 353 | struct tipc_msg *msg; |
0c3141e9 AS |
354 | |
355 | /* Validate arguments */ | |
b97bf3fd PL |
356 | if (unlikely(protocol != 0)) |
357 | return -EPROTONOSUPPORT; | |
358 | ||
b97bf3fd PL |
359 | switch (sock->type) { |
360 | case SOCK_STREAM: | |
0c3141e9 AS |
361 | ops = &stream_ops; |
362 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
363 | break; |
364 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
365 | ops = &packet_ops; |
366 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
367 | break; |
368 | case SOCK_DGRAM: | |
b97bf3fd | 369 | case SOCK_RDM: |
0c3141e9 AS |
370 | ops = &msg_ops; |
371 | state = SS_READY; | |
b97bf3fd | 372 | break; |
49978651 | 373 | default: |
49978651 | 374 | return -EPROTOTYPE; |
b97bf3fd PL |
375 | } |
376 | ||
0c3141e9 | 377 | /* Allocate socket's protocol area */ |
11aa9c28 | 378 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 379 | if (sk == NULL) |
b97bf3fd | 380 | return -ENOMEM; |
b97bf3fd | 381 | |
58ed9442 | 382 | tsk = tipc_sk(sk); |
301bae56 | 383 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
384 | INIT_LIST_HEAD(&tsk->publications); |
385 | msg = &tsk->phdr; | |
c5898636 JPM |
386 | tn = net_generic(sock_net(sk), tipc_net_id); |
387 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 388 | NAMED_H_SIZE, 0); |
b97bf3fd | 389 | |
0c3141e9 | 390 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
391 | sock->ops = ops; |
392 | sock->state = state; | |
0c3141e9 | 393 | sock_init_data(sock, sk); |
07f6c4bc | 394 | if (tipc_sk_insert(tsk)) { |
c19ca6cb | 395 | pr_warn("Socket create failed; port number exhausted\n"); |
07f6c4bc YX |
396 | return -EINVAL; |
397 | } | |
398 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 399 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
4f4482dc | 400 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 401 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
402 | sk->sk_data_ready = tipc_data_ready; |
403 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 404 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc JPM |
405 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
406 | atomic_set(&tsk->dupl_rcvcnt, 0); | |
7ef43eba | 407 | |
10724cc7 JPM |
408 | /* Start out with safe limits until we receive an advertised window */ |
409 | tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN); | |
410 | tsk->rcv_win = tsk->snd_win; | |
411 | ||
0c3141e9 | 412 | if (sock->state == SS_READY) { |
301bae56 | 413 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 414 | if (sock->type == SOCK_DGRAM) |
301bae56 | 415 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 416 | } |
b97bf3fd PL |
417 | return 0; |
418 | } | |
419 | ||
07f6c4bc YX |
420 | static void tipc_sk_callback(struct rcu_head *head) |
421 | { | |
422 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
423 | ||
424 | sock_put(&tsk->sk); | |
425 | } | |
426 | ||
b97bf3fd | 427 | /** |
247f0f3c | 428 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
429 | * @sock: socket to destroy |
430 | * | |
431 | * This routine cleans up any messages that are still queued on the socket. | |
432 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
433 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
434 | * and any others are discarded. (If the first message on a STREAM socket | |
435 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 436 | * |
b97bf3fd PL |
437 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
438 | * are returned or discarded according to the "destination droppable" setting | |
439 | * specified for the message by the sender. | |
440 | * | |
441 | * Returns 0 on success, errno otherwise | |
442 | */ | |
247f0f3c | 443 | static int tipc_release(struct socket *sock) |
b97bf3fd | 444 | { |
b97bf3fd | 445 | struct sock *sk = sock->sk; |
357c4774 | 446 | struct net *net; |
58ed9442 | 447 | struct tipc_sock *tsk; |
a6ca1094 | 448 | struct sk_buff *skb; |
1ea23a21 | 449 | u32 dnode; |
b97bf3fd | 450 | |
0c3141e9 AS |
451 | /* |
452 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
453 | * releases a pre-allocated child socket that was never used) | |
454 | */ | |
0c3141e9 | 455 | if (sk == NULL) |
b97bf3fd | 456 | return 0; |
c4307285 | 457 | |
357c4774 | 458 | net = sock_net(sk); |
58ed9442 | 459 | tsk = tipc_sk(sk); |
0c3141e9 AS |
460 | lock_sock(sk); |
461 | ||
462 | /* | |
463 | * Reject all unreceived messages, except on an active connection | |
464 | * (which disconnects locally & sends a 'FIN+' to peer) | |
465 | */ | |
301bae56 | 466 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 467 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
468 | skb = __skb_dequeue(&sk->sk_receive_queue); |
469 | if (skb == NULL) | |
b97bf3fd | 470 | break; |
ba8aebe9 | 471 | if (TIPC_SKB_CB(skb)->bytes_read) |
a6ca1094 | 472 | kfree_skb(skb); |
0c3141e9 AS |
473 | else { |
474 | if ((sock->state == SS_CONNECTING) || | |
475 | (sock->state == SS_CONNECTED)) { | |
476 | sock->state = SS_DISCONNECTING; | |
f2f9800d | 477 | tipc_node_remove_conn(net, dnode, tsk->portid); |
0c3141e9 | 478 | } |
bcd3ffd4 | 479 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); |
0c3141e9 | 480 | } |
b97bf3fd PL |
481 | } |
482 | ||
301bae56 | 483 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 484 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 485 | tipc_sk_remove(tsk); |
d6fb7e9c | 486 | if (tipc_sk_connected(sk)) { |
c5898636 | 487 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 488 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
c5898636 | 489 | tsk_own_node(tsk), tsk_peer_port(tsk), |
07f6c4bc | 490 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 491 | if (skb) |
af9b028e | 492 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); |
f2f9800d | 493 | tipc_node_remove_conn(net, dnode, tsk->portid); |
5b8fa7ce | 494 | } |
b97bf3fd | 495 | |
0c3141e9 | 496 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
497 | sock->state = SS_DISCONNECTING; |
498 | release_sock(sk); | |
07f6c4bc YX |
499 | |
500 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 501 | sock->sk = NULL; |
b97bf3fd | 502 | |
065d7e39 | 503 | return 0; |
b97bf3fd PL |
504 | } |
505 | ||
506 | /** | |
247f0f3c | 507 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
508 | * @sock: socket structure |
509 | * @uaddr: socket address describing name(s) and desired operation | |
510 | * @uaddr_len: size of socket address data structure | |
c4307285 | 511 | * |
b97bf3fd PL |
512 | * Name and name sequence binding is indicated using a positive scope value; |
513 | * a negative scope value unbinds the specified name. Specifying no name | |
514 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 515 | * |
b97bf3fd | 516 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
517 | * |
518 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
519 | * access any non-constant socket information. | |
b97bf3fd | 520 | */ |
247f0f3c YX |
521 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
522 | int uaddr_len) | |
b97bf3fd | 523 | { |
84602761 | 524 | struct sock *sk = sock->sk; |
b97bf3fd | 525 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 526 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 527 | int res = -EINVAL; |
b97bf3fd | 528 | |
84602761 YX |
529 | lock_sock(sk); |
530 | if (unlikely(!uaddr_len)) { | |
301bae56 | 531 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
532 | goto exit; |
533 | } | |
c4307285 | 534 | |
84602761 YX |
535 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
536 | res = -EINVAL; | |
537 | goto exit; | |
538 | } | |
539 | if (addr->family != AF_TIPC) { | |
540 | res = -EAFNOSUPPORT; | |
541 | goto exit; | |
542 | } | |
b97bf3fd | 543 | |
b97bf3fd PL |
544 | if (addr->addrtype == TIPC_ADDR_NAME) |
545 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
546 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
547 | res = -EAFNOSUPPORT; | |
548 | goto exit; | |
549 | } | |
c4307285 | 550 | |
13a2e898 | 551 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 552 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
553 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
554 | res = -EACCES; | |
555 | goto exit; | |
556 | } | |
c422f1bd | 557 | |
84602761 | 558 | res = (addr->scope > 0) ? |
301bae56 JPM |
559 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
560 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
561 | exit: |
562 | release_sock(sk); | |
563 | return res; | |
b97bf3fd PL |
564 | } |
565 | ||
c4307285 | 566 | /** |
247f0f3c | 567 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
568 | * @sock: socket structure |
569 | * @uaddr: area for returned socket address | |
570 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 571 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 572 | * |
b97bf3fd | 573 | * Returns 0 on success, errno otherwise |
0c3141e9 | 574 | * |
2da59918 AS |
575 | * NOTE: This routine doesn't need to take the socket lock since it only |
576 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 577 | * a completely predictable manner). |
b97bf3fd | 578 | */ |
247f0f3c YX |
579 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
580 | int *uaddr_len, int peer) | |
b97bf3fd | 581 | { |
b97bf3fd | 582 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 583 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
34747539 | 584 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 585 | |
88f8a5e3 | 586 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 587 | if (peer) { |
2da59918 AS |
588 | if ((sock->state != SS_CONNECTED) && |
589 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
590 | return -ENOTCONN; | |
301bae56 JPM |
591 | addr->addr.id.ref = tsk_peer_port(tsk); |
592 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 593 | } else { |
07f6c4bc | 594 | addr->addr.id.ref = tsk->portid; |
34747539 | 595 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 596 | } |
b97bf3fd PL |
597 | |
598 | *uaddr_len = sizeof(*addr); | |
599 | addr->addrtype = TIPC_ADDR_ID; | |
600 | addr->family = AF_TIPC; | |
601 | addr->scope = 0; | |
b97bf3fd PL |
602 | addr->addr.name.domain = 0; |
603 | ||
0c3141e9 | 604 | return 0; |
b97bf3fd PL |
605 | } |
606 | ||
607 | /** | |
247f0f3c | 608 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
609 | * @file: file structure associated with the socket |
610 | * @sock: socket for which to calculate the poll bits | |
611 | * @wait: ??? | |
612 | * | |
9b674e82 AS |
613 | * Returns pollmask value |
614 | * | |
615 | * COMMENTARY: | |
616 | * It appears that the usual socket locking mechanisms are not useful here | |
617 | * since the pollmask info is potentially out-of-date the moment this routine | |
618 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
619 | * to handle any preventable race conditions, so TIPC will do the same ... | |
620 | * | |
621 | * TIPC sets the returned events as follows: | |
f662c070 AS |
622 | * |
623 | * socket state flags set | |
624 | * ------------ --------- | |
625 | * unconnected no read flags | |
c4fc298a | 626 | * POLLOUT if port is not congested |
f662c070 AS |
627 | * |
628 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
629 | * no write flags | |
630 | * | |
631 | * connected POLLIN/POLLRDNORM if data in rx queue | |
632 | * POLLOUT if port is not congested | |
633 | * | |
634 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
635 | * no write flags | |
636 | * | |
637 | * listening POLLIN if SYN in rx queue | |
638 | * no write flags | |
639 | * | |
640 | * ready POLLIN/POLLRDNORM if data in rx queue | |
641 | * [connectionless] POLLOUT (since port cannot be congested) | |
642 | * | |
643 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
644 | * imply that the operation will succeed, merely that it should be performed | |
645 | * and will not block. | |
b97bf3fd | 646 | */ |
247f0f3c YX |
647 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
648 | poll_table *wait) | |
b97bf3fd | 649 | { |
9b674e82 | 650 | struct sock *sk = sock->sk; |
58ed9442 | 651 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 652 | u32 mask = 0; |
9b674e82 | 653 | |
f288bef4 | 654 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 655 | |
f662c070 | 656 | switch ((int)sock->state) { |
c4fc298a | 657 | case SS_UNCONNECTED: |
60120526 | 658 | if (!tsk->link_cong) |
c4fc298a EH |
659 | mask |= POLLOUT; |
660 | break; | |
f662c070 AS |
661 | case SS_READY: |
662 | case SS_CONNECTED: | |
301bae56 | 663 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
664 | mask |= POLLOUT; |
665 | /* fall thru' */ | |
666 | case SS_CONNECTING: | |
667 | case SS_LISTENING: | |
668 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
669 | mask |= (POLLIN | POLLRDNORM); | |
670 | break; | |
671 | case SS_DISCONNECTING: | |
672 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
673 | break; | |
674 | } | |
9b674e82 AS |
675 | |
676 | return mask; | |
b97bf3fd PL |
677 | } |
678 | ||
0abd8ff2 JPM |
679 | /** |
680 | * tipc_sendmcast - send multicast message | |
681 | * @sock: socket structure | |
682 | * @seq: destination address | |
562640f3 | 683 | * @msg: message to send |
0abd8ff2 JPM |
684 | * @dsz: total length of message data |
685 | * @timeo: timeout to wait for wakeup | |
686 | * | |
687 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
688 | * Returns the number of bytes sent on success, or errno | |
689 | */ | |
690 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 691 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
692 | { |
693 | struct sock *sk = sock->sk; | |
c5898636 | 694 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 695 | struct net *net = sock_net(sk); |
c5898636 | 696 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 697 | struct sk_buff_head pktchain; |
f25dcc76 | 698 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
699 | uint mtu; |
700 | int rc; | |
701 | ||
7cf87fa2 PB |
702 | if (!timeo && tsk->link_cong) |
703 | return -ELINKCONG; | |
704 | ||
0abd8ff2 JPM |
705 | msg_set_type(mhdr, TIPC_MCAST_MSG); |
706 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
707 | msg_set_destport(mhdr, 0); | |
708 | msg_set_destnode(mhdr, 0); | |
709 | msg_set_nametype(mhdr, seq->type); | |
710 | msg_set_namelower(mhdr, seq->lower); | |
711 | msg_set_nameupper(mhdr, seq->upper); | |
712 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
713 | ||
f214fc40 PB |
714 | skb_queue_head_init(&pktchain); |
715 | ||
0abd8ff2 | 716 | new_mtu: |
959e1781 | 717 | mtu = tipc_bcast_get_mtu(net); |
f214fc40 | 718 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &pktchain); |
0abd8ff2 JPM |
719 | if (unlikely(rc < 0)) |
720 | return rc; | |
721 | ||
722 | do { | |
f214fc40 | 723 | rc = tipc_bcast_xmit(net, &pktchain); |
22d85c79 JPM |
724 | if (likely(!rc)) |
725 | return dsz; | |
726 | ||
727 | if (rc == -ELINKCONG) { | |
728 | tsk->link_cong = 1; | |
729 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
730 | if (!rc) | |
731 | continue; | |
0abd8ff2 | 732 | } |
f214fc40 | 733 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
734 | if (rc == -EMSGSIZE) { |
735 | msg->msg_iter = save; | |
0abd8ff2 | 736 | goto new_mtu; |
f25dcc76 | 737 | } |
22d85c79 JPM |
738 | break; |
739 | } while (1); | |
0abd8ff2 JPM |
740 | return rc; |
741 | } | |
742 | ||
cb1b7280 JPM |
743 | /** |
744 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
745 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
746 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
747 | * | |
748 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 749 | */ |
cb1b7280 JPM |
750 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
751 | struct sk_buff_head *inputq) | |
078bec82 | 752 | { |
cb1b7280 | 753 | struct tipc_msg *msg; |
3c724acd | 754 | struct tipc_plist dports; |
3c724acd | 755 | u32 portid; |
078bec82 | 756 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
757 | struct sk_buff_head tmpq; |
758 | uint hsz; | |
759 | struct sk_buff *skb, *_skb; | |
3c724acd | 760 | |
cb1b7280 | 761 | __skb_queue_head_init(&tmpq); |
3c724acd | 762 | tipc_plist_init(&dports); |
078bec82 | 763 | |
cb1b7280 JPM |
764 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
765 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
766 | msg = buf_msg(skb); | |
767 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
768 | ||
769 | if (in_own_node(net, msg_orignode(msg))) | |
770 | scope = TIPC_NODE_SCOPE; | |
771 | ||
772 | /* Create destination port list and message clones: */ | |
773 | tipc_nametbl_mc_translate(net, | |
774 | msg_nametype(msg), msg_namelower(msg), | |
775 | msg_nameupper(msg), scope, &dports); | |
776 | portid = tipc_plist_pop(&dports); | |
777 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
778 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
779 | if (_skb) { | |
780 | msg_set_destport(buf_msg(_skb), portid); | |
781 | __skb_queue_tail(&tmpq, _skb); | |
782 | continue; | |
783 | } | |
784 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 785 | } |
cb1b7280 JPM |
786 | /* Append to inputq if not already done by other thread */ |
787 | spin_lock_bh(&inputq->lock); | |
788 | if (skb_peek(arrvq) == skb) { | |
789 | skb_queue_splice_tail_init(&tmpq, inputq); | |
790 | kfree_skb(__skb_dequeue(arrvq)); | |
791 | } | |
792 | spin_unlock_bh(&inputq->lock); | |
793 | __skb_queue_purge(&tmpq); | |
794 | kfree_skb(skb); | |
078bec82 | 795 | } |
cb1b7280 | 796 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
797 | } |
798 | ||
ac0074ee JPM |
799 | /** |
800 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
801 | * @tsk: receiving socket | |
bcd3ffd4 | 802 | * @skb: pointer to message buffer. |
ac0074ee | 803 | */ |
f1d048f2 JPM |
804 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb, |
805 | struct sk_buff_head *xmitq) | |
ac0074ee | 806 | { |
bcd3ffd4 | 807 | struct sock *sk = &tsk->sk; |
f1d048f2 | 808 | u32 onode = tsk_own_node(tsk); |
bcd3ffd4 JPM |
809 | struct tipc_msg *hdr = buf_msg(skb); |
810 | int mtyp = msg_type(hdr); | |
10724cc7 | 811 | bool conn_cong; |
bcd3ffd4 | 812 | |
ac0074ee | 813 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 814 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
815 | goto exit; |
816 | ||
301bae56 | 817 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee | 818 | |
bcd3ffd4 JPM |
819 | if (mtyp == CONN_PROBE) { |
820 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
f1d048f2 JPM |
821 | if (tipc_msg_reverse(onode, &skb, TIPC_OK)) |
822 | __skb_queue_tail(xmitq, skb); | |
bcd3ffd4 JPM |
823 | return; |
824 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 825 | conn_cong = tsk_conn_cong(tsk); |
10724cc7 JPM |
826 | tsk->snt_unacked -= msg_conn_ack(hdr); |
827 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) | |
828 | tsk->snd_win = msg_adv_win(hdr); | |
60120526 | 829 | if (conn_cong) |
bcd3ffd4 JPM |
830 | sk->sk_write_space(sk); |
831 | } else if (mtyp != CONN_PROBE_REPLY) { | |
832 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 833 | } |
ac0074ee | 834 | exit: |
bcd3ffd4 | 835 | kfree_skb(skb); |
ac0074ee JPM |
836 | } |
837 | ||
3f40504f YX |
838 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
839 | { | |
840 | struct sock *sk = sock->sk; | |
58ed9442 | 841 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
842 | DEFINE_WAIT(wait); |
843 | int done; | |
844 | ||
845 | do { | |
846 | int err = sock_error(sk); | |
847 | if (err) | |
848 | return err; | |
849 | if (sock->state == SS_DISCONNECTING) | |
850 | return -EPIPE; | |
851 | if (!*timeo_p) | |
852 | return -EAGAIN; | |
853 | if (signal_pending(current)) | |
854 | return sock_intr_errno(*timeo_p); | |
855 | ||
856 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 857 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
858 | finish_wait(sk_sleep(sk), &wait); |
859 | } while (!done); | |
860 | return 0; | |
861 | } | |
862 | ||
b97bf3fd | 863 | /** |
247f0f3c | 864 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
865 | * @sock: socket structure |
866 | * @m: message to send | |
e2dafe87 | 867 | * @dsz: amount of user data to be sent |
c4307285 | 868 | * |
b97bf3fd | 869 | * Message must have an destination specified explicitly. |
c4307285 | 870 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
871 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
872 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 873 | * |
b97bf3fd PL |
874 | * Returns the number of bytes sent on success, or errno otherwise |
875 | */ | |
1b784140 | 876 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 877 | struct msghdr *m, size_t dsz) |
39a0295f YX |
878 | { |
879 | struct sock *sk = sock->sk; | |
880 | int ret; | |
881 | ||
882 | lock_sock(sk); | |
883 | ret = __tipc_sendmsg(sock, m, dsz); | |
884 | release_sock(sk); | |
885 | ||
886 | return ret; | |
887 | } | |
888 | ||
889 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 890 | { |
e2dafe87 | 891 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 892 | struct sock *sk = sock->sk; |
58ed9442 | 893 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 894 | struct net *net = sock_net(sk); |
301bae56 | 895 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 896 | u32 dnode, dport; |
f214fc40 | 897 | struct sk_buff_head pktchain; |
a6ca1094 | 898 | struct sk_buff *skb; |
f2f8036e | 899 | struct tipc_name_seq *seq; |
f25dcc76 | 900 | struct iov_iter save; |
e2dafe87 | 901 | u32 mtu; |
3f40504f | 902 | long timeo; |
88b17b6a | 903 | int rc; |
b97bf3fd | 904 | |
e2dafe87 | 905 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 906 | return -EMSGSIZE; |
f2f8036e | 907 | if (unlikely(!dest)) { |
87227fe7 | 908 | if (sock->state == SS_READY && tsk->peer.family == AF_TIPC) |
aeda16b6 | 909 | dest = &tsk->peer; |
f2f8036e EH |
910 | else |
911 | return -EDESTADDRREQ; | |
912 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || | |
913 | dest->family != AF_TIPC) { | |
914 | return -EINVAL; | |
915 | } | |
e2dafe87 | 916 | if (unlikely(sock->state != SS_READY)) { |
39a0295f YX |
917 | if (sock->state == SS_LISTENING) |
918 | return -EPIPE; | |
919 | if (sock->state != SS_UNCONNECTED) | |
920 | return -EISCONN; | |
921 | if (tsk->published) | |
922 | return -EOPNOTSUPP; | |
3388007b | 923 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
924 | tsk->conn_type = dest->addr.name.name.type; |
925 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 926 | } |
b97bf3fd | 927 | } |
f2f8036e | 928 | seq = &dest->addr.nameseq; |
3f40504f | 929 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
930 | |
931 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 932 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
933 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
934 | u32 type = dest->addr.name.name.type; | |
935 | u32 inst = dest->addr.name.name.instance; | |
936 | u32 domain = dest->addr.name.domain; | |
937 | ||
938 | dnode = domain; | |
939 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
940 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
941 | msg_set_nametype(mhdr, type); | |
942 | msg_set_nameinst(mhdr, inst); | |
943 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 944 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
945 | msg_set_destnode(mhdr, dnode); |
946 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
947 | if (unlikely(!dport && !dnode)) |
948 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
949 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
950 | dnode = dest->addr.id.node; | |
951 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
952 | msg_set_lookup_scope(mhdr, 0); | |
953 | msg_set_destnode(mhdr, dnode); | |
954 | msg_set_destport(mhdr, dest->addr.id.ref); | |
955 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
956 | } | |
957 | ||
f214fc40 | 958 | skb_queue_head_init(&pktchain); |
f25dcc76 | 959 | save = m->msg_iter; |
e2dafe87 | 960 | new_mtu: |
f2f9800d | 961 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
f214fc40 | 962 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &pktchain); |
e2dafe87 | 963 | if (rc < 0) |
39a0295f | 964 | return rc; |
e2dafe87 JPM |
965 | |
966 | do { | |
f214fc40 | 967 | skb = skb_peek(&pktchain); |
a6ca1094 | 968 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
f214fc40 | 969 | rc = tipc_node_xmit(net, &pktchain, dnode, tsk->portid); |
22d85c79 | 970 | if (likely(!rc)) { |
e2dafe87 | 971 | if (sock->state != SS_READY) |
0c3141e9 | 972 | sock->state = SS_CONNECTING; |
22d85c79 | 973 | return dsz; |
c4307285 | 974 | } |
22d85c79 JPM |
975 | if (rc == -ELINKCONG) { |
976 | tsk->link_cong = 1; | |
977 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
978 | if (!rc) | |
979 | continue; | |
980 | } | |
f214fc40 | 981 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
982 | if (rc == -EMSGSIZE) { |
983 | m->msg_iter = save; | |
e2dafe87 | 984 | goto new_mtu; |
f25dcc76 | 985 | } |
22d85c79 JPM |
986 | break; |
987 | } while (1); | |
e2dafe87 JPM |
988 | |
989 | return rc; | |
b97bf3fd PL |
990 | } |
991 | ||
391a6dd1 YX |
992 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
993 | { | |
994 | struct sock *sk = sock->sk; | |
58ed9442 | 995 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
996 | DEFINE_WAIT(wait); |
997 | int done; | |
998 | ||
999 | do { | |
1000 | int err = sock_error(sk); | |
1001 | if (err) | |
1002 | return err; | |
1003 | if (sock->state == SS_DISCONNECTING) | |
1004 | return -EPIPE; | |
1005 | else if (sock->state != SS_CONNECTED) | |
1006 | return -ENOTCONN; | |
1007 | if (!*timeo_p) | |
1008 | return -EAGAIN; | |
1009 | if (signal_pending(current)) | |
1010 | return sock_intr_errno(*timeo_p); | |
1011 | ||
1012 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1013 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 1014 | (!tsk->link_cong && |
301bae56 | 1015 | !tsk_conn_cong(tsk)) || |
d6fb7e9c | 1016 | !tipc_sk_connected(sk)); |
391a6dd1 YX |
1017 | finish_wait(sk_sleep(sk), &wait); |
1018 | } while (!done); | |
1019 | return 0; | |
1020 | } | |
1021 | ||
c4307285 | 1022 | /** |
4ccfe5e0 | 1023 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 1024 | * @sock: socket structure |
4ccfe5e0 JPM |
1025 | * @m: data to send |
1026 | * @dsz: total length of data to be transmitted | |
c4307285 | 1027 | * |
4ccfe5e0 | 1028 | * Used for SOCK_STREAM data. |
c4307285 | 1029 | * |
4ccfe5e0 JPM |
1030 | * Returns the number of bytes sent on success (or partial success), |
1031 | * or errno if no data sent | |
b97bf3fd | 1032 | */ |
1b784140 | 1033 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1034 | { |
1035 | struct sock *sk = sock->sk; | |
1036 | int ret; | |
1037 | ||
1038 | lock_sock(sk); | |
1039 | ret = __tipc_send_stream(sock, m, dsz); | |
1040 | release_sock(sk); | |
1041 | ||
1042 | return ret; | |
1043 | } | |
1044 | ||
1045 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1046 | { |
0c3141e9 | 1047 | struct sock *sk = sock->sk; |
f2f9800d | 1048 | struct net *net = sock_net(sk); |
58ed9442 | 1049 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1050 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 1051 | struct sk_buff_head pktchain; |
342dfc30 | 1052 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1053 | u32 portid = tsk->portid; |
4ccfe5e0 | 1054 | int rc = -EINVAL; |
391a6dd1 | 1055 | long timeo; |
4ccfe5e0 JPM |
1056 | u32 dnode; |
1057 | uint mtu, send, sent = 0; | |
f25dcc76 | 1058 | struct iov_iter save; |
10724cc7 | 1059 | int hlen = MIN_H_SIZE; |
b97bf3fd PL |
1060 | |
1061 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1062 | if (unlikely(dest)) { |
39a0295f | 1063 | rc = __tipc_sendmsg(sock, m, dsz); |
10724cc7 | 1064 | hlen = msg_hdr_sz(mhdr); |
4ccfe5e0 | 1065 | if (dsz && (dsz == rc)) |
10724cc7 | 1066 | tsk->snt_unacked = tsk_inc(tsk, dsz + hlen); |
4ccfe5e0 JPM |
1067 | return rc; |
1068 | } | |
1069 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1070 | return -EMSGSIZE; |
1071 | ||
391a6dd1 YX |
1072 | if (unlikely(sock->state != SS_CONNECTED)) { |
1073 | if (sock->state == SS_DISCONNECTING) | |
39a0295f | 1074 | return -EPIPE; |
391a6dd1 | 1075 | else |
39a0295f | 1076 | return -ENOTCONN; |
391a6dd1 | 1077 | } |
1d835874 | 1078 | |
391a6dd1 | 1079 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
7cf87fa2 PB |
1080 | if (!timeo && tsk->link_cong) |
1081 | return -ELINKCONG; | |
1082 | ||
301bae56 | 1083 | dnode = tsk_peer_node(tsk); |
f214fc40 | 1084 | skb_queue_head_init(&pktchain); |
4ccfe5e0 JPM |
1085 | |
1086 | next: | |
f25dcc76 | 1087 | save = m->msg_iter; |
301bae56 | 1088 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1089 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
f214fc40 | 1090 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, &pktchain); |
4ccfe5e0 | 1091 | if (unlikely(rc < 0)) |
39a0295f | 1092 | return rc; |
f214fc40 | 1093 | |
c4307285 | 1094 | do { |
301bae56 | 1095 | if (likely(!tsk_conn_cong(tsk))) { |
f214fc40 | 1096 | rc = tipc_node_xmit(net, &pktchain, dnode, portid); |
4ccfe5e0 | 1097 | if (likely(!rc)) { |
10724cc7 | 1098 | tsk->snt_unacked += tsk_inc(tsk, send + hlen); |
4ccfe5e0 JPM |
1099 | sent += send; |
1100 | if (sent == dsz) | |
22d85c79 | 1101 | return dsz; |
4ccfe5e0 JPM |
1102 | goto next; |
1103 | } | |
1104 | if (rc == -EMSGSIZE) { | |
f214fc40 | 1105 | __skb_queue_purge(&pktchain); |
f2f9800d YX |
1106 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1107 | portid); | |
f25dcc76 | 1108 | m->msg_iter = save; |
4ccfe5e0 JPM |
1109 | goto next; |
1110 | } | |
1111 | if (rc != -ELINKCONG) | |
1112 | break; | |
22d85c79 | 1113 | |
50100a5e | 1114 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1115 | } |
1116 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
1117 | } while (!rc); | |
39a0295f | 1118 | |
f214fc40 | 1119 | __skb_queue_purge(&pktchain); |
4ccfe5e0 | 1120 | return sent ? sent : rc; |
b97bf3fd PL |
1121 | } |
1122 | ||
c4307285 | 1123 | /** |
4ccfe5e0 | 1124 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1125 | * @sock: socket structure |
4ccfe5e0 JPM |
1126 | * @m: message to send |
1127 | * @dsz: length of data to be transmitted | |
c4307285 | 1128 | * |
4ccfe5e0 | 1129 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1130 | * |
4ccfe5e0 | 1131 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1132 | */ |
1b784140 | 1133 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1134 | { |
4ccfe5e0 JPM |
1135 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1136 | return -EMSGSIZE; | |
b97bf3fd | 1137 | |
1b784140 | 1138 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1139 | } |
1140 | ||
dadebc00 | 1141 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1142 | */ |
301bae56 | 1143 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1144 | u32 peer_node) |
b97bf3fd | 1145 | { |
3721e9c7 YX |
1146 | struct sock *sk = &tsk->sk; |
1147 | struct net *net = sock_net(sk); | |
301bae56 | 1148 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1149 | |
dadebc00 JPM |
1150 | msg_set_destnode(msg, peer_node); |
1151 | msg_set_destport(msg, peer_port); | |
1152 | msg_set_type(msg, TIPC_CONN_MSG); | |
1153 | msg_set_lookup_scope(msg, 0); | |
1154 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1155 | |
2f55c437 | 1156 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 | 1157 | tsk->probing_state = TIPC_CONN_OK; |
3721e9c7 | 1158 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
f2f9800d YX |
1159 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1160 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
60020e18 | 1161 | tsk->peer_caps = tipc_node_get_capabilities(net, peer_node); |
10724cc7 JPM |
1162 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) |
1163 | return; | |
1164 | ||
1165 | /* Fall back to message based flow control */ | |
1166 | tsk->rcv_win = FLOWCTL_MSG_WIN; | |
1167 | tsk->snd_win = FLOWCTL_MSG_WIN; | |
b97bf3fd PL |
1168 | } |
1169 | ||
1170 | /** | |
1171 | * set_orig_addr - capture sender's address for received message | |
1172 | * @m: descriptor for message info | |
1173 | * @msg: received message header | |
c4307285 | 1174 | * |
b97bf3fd PL |
1175 | * Note: Address is not captured if not requested by receiver. |
1176 | */ | |
05790c64 | 1177 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1178 | { |
342dfc30 | 1179 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1180 | |
c4307285 | 1181 | if (addr) { |
b97bf3fd PL |
1182 | addr->family = AF_TIPC; |
1183 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1184 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1185 | addr->addr.id.ref = msg_origport(msg); |
1186 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1187 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1188 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1189 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1190 | } | |
1191 | } | |
1192 | ||
1193 | /** | |
301bae56 | 1194 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1195 | * @m: descriptor for message info |
1196 | * @msg: received message header | |
301bae56 | 1197 | * @tsk: TIPC port associated with message |
c4307285 | 1198 | * |
b97bf3fd | 1199 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1200 | * |
b97bf3fd PL |
1201 | * Returns 0 if successful, otherwise errno |
1202 | */ | |
301bae56 JPM |
1203 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1204 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1205 | { |
1206 | u32 anc_data[3]; | |
1207 | u32 err; | |
1208 | u32 dest_type; | |
3546c750 | 1209 | int has_name; |
b97bf3fd PL |
1210 | int res; |
1211 | ||
1212 | if (likely(m->msg_controllen == 0)) | |
1213 | return 0; | |
1214 | ||
1215 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1216 | err = msg ? msg_errcode(msg) : 0; |
1217 | if (unlikely(err)) { | |
1218 | anc_data[0] = err; | |
1219 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1220 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1221 | if (res) | |
b97bf3fd | 1222 | return res; |
2db9983a AS |
1223 | if (anc_data[1]) { |
1224 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1225 | msg_data(msg)); | |
1226 | if (res) | |
1227 | return res; | |
1228 | } | |
b97bf3fd PL |
1229 | } |
1230 | ||
1231 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1232 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1233 | switch (dest_type) { | |
1234 | case TIPC_NAMED_MSG: | |
3546c750 | 1235 | has_name = 1; |
b97bf3fd PL |
1236 | anc_data[0] = msg_nametype(msg); |
1237 | anc_data[1] = msg_namelower(msg); | |
1238 | anc_data[2] = msg_namelower(msg); | |
1239 | break; | |
1240 | case TIPC_MCAST_MSG: | |
3546c750 | 1241 | has_name = 1; |
b97bf3fd PL |
1242 | anc_data[0] = msg_nametype(msg); |
1243 | anc_data[1] = msg_namelower(msg); | |
1244 | anc_data[2] = msg_nameupper(msg); | |
1245 | break; | |
1246 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1247 | has_name = (tsk->conn_type != 0); |
1248 | anc_data[0] = tsk->conn_type; | |
1249 | anc_data[1] = tsk->conn_instance; | |
1250 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1251 | break; |
1252 | default: | |
3546c750 | 1253 | has_name = 0; |
b97bf3fd | 1254 | } |
2db9983a AS |
1255 | if (has_name) { |
1256 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1257 | if (res) | |
1258 | return res; | |
1259 | } | |
b97bf3fd PL |
1260 | |
1261 | return 0; | |
1262 | } | |
1263 | ||
10724cc7 | 1264 | static void tipc_sk_send_ack(struct tipc_sock *tsk) |
739f5e4e | 1265 | { |
d6fb7e9c PB |
1266 | struct sock *sk = &tsk->sk; |
1267 | struct net *net = sock_net(sk); | |
a6ca1094 | 1268 | struct sk_buff *skb = NULL; |
739f5e4e | 1269 | struct tipc_msg *msg; |
301bae56 JPM |
1270 | u32 peer_port = tsk_peer_port(tsk); |
1271 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1272 | |
d6fb7e9c | 1273 | if (!tipc_sk_connected(sk)) |
739f5e4e | 1274 | return; |
c5898636 JPM |
1275 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1276 | dnode, tsk_own_node(tsk), peer_port, | |
1277 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1278 | if (!skb) |
739f5e4e | 1279 | return; |
a6ca1094 | 1280 | msg = buf_msg(skb); |
10724cc7 JPM |
1281 | msg_set_conn_ack(msg, tsk->rcv_unacked); |
1282 | tsk->rcv_unacked = 0; | |
1283 | ||
1284 | /* Adjust to and advertize the correct window limit */ | |
1285 | if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) { | |
1286 | tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf); | |
1287 | msg_set_adv_win(msg, tsk->rcv_win); | |
1288 | } | |
af9b028e | 1289 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1290 | } |
1291 | ||
85d3fc94 | 1292 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1293 | { |
1294 | struct sock *sk = sock->sk; | |
1295 | DEFINE_WAIT(wait); | |
85d3fc94 | 1296 | long timeo = *timeop; |
9bbb4ecc YX |
1297 | int err; |
1298 | ||
1299 | for (;;) { | |
1300 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1301 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1302 | if (sock->state == SS_DISCONNECTING) { |
1303 | err = -ENOTCONN; | |
1304 | break; | |
1305 | } | |
1306 | release_sock(sk); | |
1307 | timeo = schedule_timeout(timeo); | |
1308 | lock_sock(sk); | |
1309 | } | |
1310 | err = 0; | |
1311 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1312 | break; | |
9bbb4ecc YX |
1313 | err = -EAGAIN; |
1314 | if (!timeo) | |
1315 | break; | |
143fe22f EH |
1316 | err = sock_intr_errno(timeo); |
1317 | if (signal_pending(current)) | |
1318 | break; | |
9bbb4ecc YX |
1319 | } |
1320 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1321 | *timeop = timeo; |
9bbb4ecc YX |
1322 | return err; |
1323 | } | |
1324 | ||
c4307285 | 1325 | /** |
247f0f3c | 1326 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1327 | * @m: descriptor for message info |
1328 | * @buf_len: total size of user buffer area | |
1329 | * @flags: receive flags | |
c4307285 | 1330 | * |
b97bf3fd PL |
1331 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1332 | * If the complete message doesn't fit in user area, truncate it. | |
1333 | * | |
1334 | * Returns size of returned message data, errno otherwise | |
1335 | */ | |
1b784140 YX |
1336 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1337 | int flags) | |
b97bf3fd | 1338 | { |
0c3141e9 | 1339 | struct sock *sk = sock->sk; |
58ed9442 | 1340 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1341 | struct sk_buff *buf; |
1342 | struct tipc_msg *msg; | |
9bbb4ecc | 1343 | long timeo; |
b97bf3fd PL |
1344 | unsigned int sz; |
1345 | u32 err; | |
10724cc7 | 1346 | int res, hlen; |
b97bf3fd | 1347 | |
0c3141e9 | 1348 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1349 | if (unlikely(!buf_len)) |
1350 | return -EINVAL; | |
1351 | ||
0c3141e9 | 1352 | lock_sock(sk); |
b97bf3fd | 1353 | |
0c3141e9 AS |
1354 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1355 | res = -ENOTCONN; | |
b97bf3fd PL |
1356 | goto exit; |
1357 | } | |
1358 | ||
9bbb4ecc | 1359 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1360 | restart: |
b97bf3fd | 1361 | |
0c3141e9 | 1362 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1363 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1364 | if (res) |
1365 | goto exit; | |
b97bf3fd | 1366 | |
0c3141e9 | 1367 | /* Look at first message in receive queue */ |
0c3141e9 | 1368 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1369 | msg = buf_msg(buf); |
1370 | sz = msg_data_sz(msg); | |
10724cc7 | 1371 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1372 | err = msg_errcode(msg); |
1373 | ||
b97bf3fd | 1374 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1375 | if ((!sz) && (!err)) { |
2e84c60b | 1376 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1377 | goto restart; |
1378 | } | |
1379 | ||
1380 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1381 | set_orig_addr(m, msg); |
1382 | ||
1383 | /* Capture ancillary data (optional) */ | |
301bae56 | 1384 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1385 | if (res) |
b97bf3fd PL |
1386 | goto exit; |
1387 | ||
1388 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1389 | if (!err) { |
1390 | if (unlikely(buf_len < sz)) { | |
1391 | sz = buf_len; | |
1392 | m->msg_flags |= MSG_TRUNC; | |
1393 | } | |
10724cc7 | 1394 | res = skb_copy_datagram_msg(buf, hlen, m, sz); |
0232fd0a | 1395 | if (res) |
b97bf3fd | 1396 | goto exit; |
b97bf3fd PL |
1397 | res = sz; |
1398 | } else { | |
1399 | if ((sock->state == SS_READY) || | |
1400 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1401 | res = 0; | |
1402 | else | |
1403 | res = -ECONNRESET; | |
1404 | } | |
1405 | ||
10724cc7 JPM |
1406 | if (unlikely(flags & MSG_PEEK)) |
1407 | goto exit; | |
1408 | ||
1409 | if (likely(sock->state != SS_READY)) { | |
1410 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); | |
1411 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1412 | tipc_sk_send_ack(tsk); | |
c4307285 | 1413 | } |
10724cc7 | 1414 | tsk_advance_rx_queue(sk); |
b97bf3fd | 1415 | exit: |
0c3141e9 | 1416 | release_sock(sk); |
b97bf3fd PL |
1417 | return res; |
1418 | } | |
1419 | ||
c4307285 | 1420 | /** |
247f0f3c | 1421 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1422 | * @m: descriptor for message info |
1423 | * @buf_len: total size of user buffer area | |
1424 | * @flags: receive flags | |
c4307285 YH |
1425 | * |
1426 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1427 | * will optionally wait for more; never truncates data. |
1428 | * | |
1429 | * Returns size of returned message data, errno otherwise | |
1430 | */ | |
1b784140 YX |
1431 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1432 | size_t buf_len, int flags) | |
b97bf3fd | 1433 | { |
0c3141e9 | 1434 | struct sock *sk = sock->sk; |
58ed9442 | 1435 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1436 | struct sk_buff *buf; |
1437 | struct tipc_msg *msg; | |
9bbb4ecc | 1438 | long timeo; |
b97bf3fd | 1439 | unsigned int sz; |
ba8aebe9 | 1440 | int target; |
b97bf3fd | 1441 | int sz_copied = 0; |
b97bf3fd | 1442 | u32 err; |
10724cc7 | 1443 | int res = 0, hlen; |
b97bf3fd | 1444 | |
0c3141e9 | 1445 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1446 | if (unlikely(!buf_len)) |
1447 | return -EINVAL; | |
1448 | ||
0c3141e9 | 1449 | lock_sock(sk); |
b97bf3fd | 1450 | |
9bbb4ecc | 1451 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1452 | res = -ENOTCONN; |
b97bf3fd PL |
1453 | goto exit; |
1454 | } | |
1455 | ||
3720d40b | 1456 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1457 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1458 | |
617d3c7a | 1459 | restart: |
0c3141e9 | 1460 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1461 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1462 | if (res) |
1463 | goto exit; | |
b97bf3fd | 1464 | |
0c3141e9 | 1465 | /* Look at first message in receive queue */ |
0c3141e9 | 1466 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1467 | msg = buf_msg(buf); |
1468 | sz = msg_data_sz(msg); | |
10724cc7 | 1469 | hlen = msg_hdr_sz(msg); |
b97bf3fd PL |
1470 | err = msg_errcode(msg); |
1471 | ||
1472 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1473 | if ((!sz) && (!err)) { |
2e84c60b | 1474 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1475 | goto restart; |
1476 | } | |
1477 | ||
1478 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1479 | if (sz_copied == 0) { |
1480 | set_orig_addr(m, msg); | |
301bae56 | 1481 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1482 | if (res) |
b97bf3fd PL |
1483 | goto exit; |
1484 | } | |
1485 | ||
1486 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1487 | if (!err) { |
ba8aebe9 PB |
1488 | u32 offset = TIPC_SKB_CB(buf)->bytes_read; |
1489 | u32 needed; | |
1490 | int sz_to_copy; | |
b97bf3fd | 1491 | |
0232fd0a | 1492 | sz -= offset; |
b97bf3fd | 1493 | needed = (buf_len - sz_copied); |
ba8aebe9 | 1494 | sz_to_copy = min(sz, needed); |
0232fd0a | 1495 | |
10724cc7 | 1496 | res = skb_copy_datagram_msg(buf, hlen + offset, m, sz_to_copy); |
0232fd0a | 1497 | if (res) |
b97bf3fd | 1498 | goto exit; |
0232fd0a | 1499 | |
b97bf3fd PL |
1500 | sz_copied += sz_to_copy; |
1501 | ||
1502 | if (sz_to_copy < sz) { | |
1503 | if (!(flags & MSG_PEEK)) | |
ba8aebe9 PB |
1504 | TIPC_SKB_CB(buf)->bytes_read = |
1505 | offset + sz_to_copy; | |
b97bf3fd PL |
1506 | goto exit; |
1507 | } | |
b97bf3fd PL |
1508 | } else { |
1509 | if (sz_copied != 0) | |
1510 | goto exit; /* can't add error msg to valid data */ | |
1511 | ||
1512 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1513 | res = 0; | |
1514 | else | |
1515 | res = -ECONNRESET; | |
1516 | } | |
1517 | ||
10724cc7 JPM |
1518 | if (unlikely(flags & MSG_PEEK)) |
1519 | goto exit; | |
1520 | ||
1521 | tsk->rcv_unacked += tsk_inc(tsk, hlen + sz); | |
1522 | if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4))) | |
1523 | tipc_sk_send_ack(tsk); | |
1524 | tsk_advance_rx_queue(sk); | |
b97bf3fd PL |
1525 | |
1526 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1527 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1528 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1529 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 | 1530 | (!err)) /* and haven't reached a FIN */ |
b97bf3fd PL |
1531 | goto restart; |
1532 | ||
1533 | exit: | |
0c3141e9 | 1534 | release_sock(sk); |
a3b0a5a9 | 1535 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1536 | } |
1537 | ||
f288bef4 YX |
1538 | /** |
1539 | * tipc_write_space - wake up thread if port congestion is released | |
1540 | * @sk: socket | |
1541 | */ | |
1542 | static void tipc_write_space(struct sock *sk) | |
1543 | { | |
1544 | struct socket_wq *wq; | |
1545 | ||
1546 | rcu_read_lock(); | |
1547 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1548 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1549 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1550 | POLLWRNORM | POLLWRBAND); | |
1551 | rcu_read_unlock(); | |
1552 | } | |
1553 | ||
1554 | /** | |
1555 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1556 | * @sk: socket | |
1557 | * @len: the length of messages | |
1558 | */ | |
676d2369 | 1559 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1560 | { |
1561 | struct socket_wq *wq; | |
1562 | ||
1563 | rcu_read_lock(); | |
1564 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1565 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1566 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1567 | POLLRDNORM | POLLRDBAND); | |
1568 | rcu_read_unlock(); | |
1569 | } | |
1570 | ||
f4195d1e YX |
1571 | static void tipc_sock_destruct(struct sock *sk) |
1572 | { | |
1573 | __skb_queue_purge(&sk->sk_receive_queue); | |
1574 | } | |
1575 | ||
7e6c131e YX |
1576 | /** |
1577 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1578 | * @tsk: TIPC socket |
1186adf7 | 1579 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1580 | * |
cda3696d | 1581 | * Returns true if everything ok, false otherwise |
7e6c131e | 1582 | */ |
cda3696d | 1583 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1584 | { |
58ed9442 | 1585 | struct sock *sk = &tsk->sk; |
f2f9800d | 1586 | struct net *net = sock_net(sk); |
8826cde6 | 1587 | struct socket *sock = sk->sk_socket; |
cda3696d | 1588 | struct tipc_msg *hdr = buf_msg(skb); |
7e6c131e | 1589 | |
cda3696d JPM |
1590 | if (unlikely(msg_mcast(hdr))) |
1591 | return false; | |
7e6c131e YX |
1592 | |
1593 | switch ((int)sock->state) { | |
1594 | case SS_CONNECTED: | |
cda3696d | 1595 | |
7e6c131e | 1596 | /* Accept only connection-based messages sent by peer */ |
cda3696d JPM |
1597 | if (unlikely(!tsk_peer_msg(tsk, hdr))) |
1598 | return false; | |
1599 | ||
1600 | if (unlikely(msg_errcode(hdr))) { | |
1601 | sock->state = SS_DISCONNECTING; | |
cda3696d JPM |
1602 | /* Let timer expire on it's own */ |
1603 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
1604 | tsk->portid); | |
4891d8fe | 1605 | sk->sk_state_change(sk); |
7e6c131e | 1606 | } |
cda3696d JPM |
1607 | return true; |
1608 | ||
7e6c131e | 1609 | case SS_CONNECTING: |
dadebc00 | 1610 | |
cda3696d JPM |
1611 | /* Accept only ACK or NACK message */ |
1612 | if (unlikely(!msg_connected(hdr))) | |
1613 | return false; | |
dadebc00 | 1614 | |
cda3696d | 1615 | if (unlikely(msg_errcode(hdr))) { |
584d24b3 | 1616 | sock->state = SS_DISCONNECTING; |
2c8d8518 | 1617 | sk->sk_err = ECONNREFUSED; |
cda3696d | 1618 | return true; |
584d24b3 YX |
1619 | } |
1620 | ||
cda3696d | 1621 | if (unlikely(!msg_isdata(hdr))) { |
584d24b3 | 1622 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1623 | sk->sk_err = EINVAL; |
cda3696d | 1624 | return true; |
584d24b3 YX |
1625 | } |
1626 | ||
cda3696d JPM |
1627 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1628 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 JPM |
1629 | sock->state = SS_CONNECTED; |
1630 | ||
cda3696d JPM |
1631 | /* If 'ACK+' message, add to socket receive queue */ |
1632 | if (msg_data_sz(hdr)) | |
1633 | return true; | |
1634 | ||
1635 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
1636 | if (waitqueue_active(sk_sleep(sk))) | |
1637 | wake_up_interruptible(sk_sleep(sk)); | |
1638 | ||
1639 | /* 'ACK-' message is neither accepted nor rejected: */ | |
1640 | msg_set_dest_droppable(hdr, 1); | |
1641 | return false; | |
1642 | ||
7e6c131e YX |
1643 | case SS_LISTENING: |
1644 | case SS_UNCONNECTED: | |
cda3696d | 1645 | |
7e6c131e | 1646 | /* Accept only SYN message */ |
cda3696d JPM |
1647 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
1648 | return true; | |
7e6c131e YX |
1649 | break; |
1650 | case SS_DISCONNECTING: | |
1651 | break; | |
1652 | default: | |
1653 | pr_err("Unknown socket state %u\n", sock->state); | |
1654 | } | |
cda3696d | 1655 | return false; |
7e6c131e YX |
1656 | } |
1657 | ||
aba79f33 YX |
1658 | /** |
1659 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1660 | * @sk: socket | |
10724cc7 | 1661 | * @skb: message |
aba79f33 | 1662 | * |
10724cc7 JPM |
1663 | * For connection oriented messages, irrespective of importance, |
1664 | * default queue limit is 2 MB. | |
aba79f33 | 1665 | * |
10724cc7 JPM |
1666 | * For connectionless messages, queue limits are based on message |
1667 | * importance as follows: | |
aba79f33 | 1668 | * |
10724cc7 JPM |
1669 | * TIPC_LOW_IMPORTANCE (2 MB) |
1670 | * TIPC_MEDIUM_IMPORTANCE (4 MB) | |
1671 | * TIPC_HIGH_IMPORTANCE (8 MB) | |
1672 | * TIPC_CRITICAL_IMPORTANCE (16 MB) | |
aba79f33 YX |
1673 | * |
1674 | * Returns overload limit according to corresponding message importance | |
1675 | */ | |
10724cc7 | 1676 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb) |
aba79f33 | 1677 | { |
10724cc7 JPM |
1678 | struct tipc_sock *tsk = tipc_sk(sk); |
1679 | struct tipc_msg *hdr = buf_msg(skb); | |
1680 | ||
1681 | if (unlikely(!msg_connected(hdr))) | |
1682 | return sk->sk_rcvbuf << msg_importance(hdr); | |
aba79f33 | 1683 | |
10724cc7 JPM |
1684 | if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL)) |
1685 | return sk->sk_rcvbuf; | |
0cee6bbe | 1686 | |
10724cc7 | 1687 | return FLOWCTL_MSG_LIM; |
aba79f33 YX |
1688 | } |
1689 | ||
c4307285 | 1690 | /** |
0c3141e9 AS |
1691 | * filter_rcv - validate incoming message |
1692 | * @sk: socket | |
cda3696d | 1693 | * @skb: pointer to message. |
c4307285 | 1694 | * |
0c3141e9 AS |
1695 | * Enqueues message on receive queue if acceptable; optionally handles |
1696 | * disconnect indication for a connected socket. | |
1697 | * | |
1186adf7 | 1698 | * Called with socket lock already taken |
c4307285 | 1699 | * |
cda3696d | 1700 | * Returns true if message was added to socket receive queue, otherwise false |
b97bf3fd | 1701 | */ |
f1d048f2 JPM |
1702 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb, |
1703 | struct sk_buff_head *xmitq) | |
b97bf3fd | 1704 | { |
0c3141e9 | 1705 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1706 | struct tipc_sock *tsk = tipc_sk(sk); |
cda3696d JPM |
1707 | struct tipc_msg *hdr = buf_msg(skb); |
1708 | unsigned int limit = rcvbuf_limit(sk, skb); | |
1709 | int err = TIPC_OK; | |
1710 | int usr = msg_user(hdr); | |
b97bf3fd | 1711 | |
cda3696d | 1712 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
f1d048f2 | 1713 | tipc_sk_proto_rcv(tsk, skb, xmitq); |
cda3696d | 1714 | return false; |
1186adf7 | 1715 | } |
ec8a2e56 | 1716 | |
cda3696d JPM |
1717 | if (unlikely(usr == SOCK_WAKEUP)) { |
1718 | kfree_skb(skb); | |
50100a5e JPM |
1719 | tsk->link_cong = 0; |
1720 | sk->sk_write_space(sk); | |
cda3696d | 1721 | return false; |
50100a5e JPM |
1722 | } |
1723 | ||
cda3696d JPM |
1724 | /* Drop if illegal message type */ |
1725 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { | |
1726 | kfree_skb(skb); | |
1727 | return false; | |
1728 | } | |
0c3141e9 | 1729 | |
cda3696d JPM |
1730 | /* Reject if wrong message type for current socket state */ |
1731 | if (unlikely(sock->state == SS_READY)) { | |
1732 | if (msg_connected(hdr)) { | |
1733 | err = TIPC_ERR_NO_PORT; | |
1734 | goto reject; | |
1735 | } | |
1736 | } else if (unlikely(!filter_connect(tsk, skb))) { | |
1737 | err = TIPC_ERR_NO_PORT; | |
1738 | goto reject; | |
b97bf3fd PL |
1739 | } |
1740 | ||
1741 | /* Reject message if there isn't room to queue it */ | |
cda3696d JPM |
1742 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
1743 | err = TIPC_ERR_OVERLOAD; | |
1744 | goto reject; | |
1745 | } | |
b97bf3fd | 1746 | |
aba79f33 | 1747 | /* Enqueue message */ |
ba8aebe9 | 1748 | TIPC_SKB_CB(skb)->bytes_read = 0; |
cda3696d JPM |
1749 | __skb_queue_tail(&sk->sk_receive_queue, skb); |
1750 | skb_set_owner_r(skb, sk); | |
0c3141e9 | 1751 | |
676d2369 | 1752 | sk->sk_data_ready(sk); |
cda3696d JPM |
1753 | return true; |
1754 | ||
1755 | reject: | |
f1d048f2 JPM |
1756 | if (tipc_msg_reverse(tsk_own_node(tsk), &skb, err)) |
1757 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1758 | return false; |
0c3141e9 | 1759 | } |
b97bf3fd | 1760 | |
0c3141e9 | 1761 | /** |
4f4482dc | 1762 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1763 | * @sk: socket |
a6ca1094 | 1764 | * @skb: message |
0c3141e9 | 1765 | * |
e3a77561 | 1766 | * Caller must hold socket lock |
0c3141e9 AS |
1767 | * |
1768 | * Returns 0 | |
1769 | */ | |
a6ca1094 | 1770 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1771 | { |
cda3696d | 1772 | unsigned int truesize = skb->truesize; |
f1d048f2 JPM |
1773 | struct sk_buff_head xmitq; |
1774 | u32 dnode, selector; | |
0c3141e9 | 1775 | |
f1d048f2 JPM |
1776 | __skb_queue_head_init(&xmitq); |
1777 | ||
1778 | if (likely(filter_rcv(sk, skb, &xmitq))) { | |
cda3696d | 1779 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); |
f1d048f2 JPM |
1780 | return 0; |
1781 | } | |
1782 | ||
1783 | if (skb_queue_empty(&xmitq)) | |
1784 | return 0; | |
1785 | ||
1786 | /* Send response/rejected message */ | |
1787 | skb = __skb_dequeue(&xmitq); | |
1788 | dnode = msg_destnode(buf_msg(skb)); | |
1789 | selector = msg_origport(buf_msg(skb)); | |
1790 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
0c3141e9 AS |
1791 | return 0; |
1792 | } | |
1793 | ||
d570d864 | 1794 | /** |
c637c103 JPM |
1795 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1796 | * inputq and try adding them to socket or backlog queue | |
1797 | * @inputq: list of incoming buffers with potentially different destinations | |
1798 | * @sk: socket where the buffers should be enqueued | |
1799 | * @dport: port number for the socket | |
d570d864 JPM |
1800 | * |
1801 | * Caller must hold socket lock | |
d570d864 | 1802 | */ |
cda3696d | 1803 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
f1d048f2 | 1804 | u32 dport, struct sk_buff_head *xmitq) |
d570d864 | 1805 | { |
f1d048f2 JPM |
1806 | unsigned long time_limit = jiffies + 2; |
1807 | struct sk_buff *skb; | |
d570d864 JPM |
1808 | unsigned int lim; |
1809 | atomic_t *dcnt; | |
f1d048f2 | 1810 | u32 onode; |
c637c103 JPM |
1811 | |
1812 | while (skb_queue_len(inputq)) { | |
51a00daf | 1813 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
1814 | return; |
1815 | ||
c637c103 JPM |
1816 | skb = tipc_skb_dequeue(inputq, dport); |
1817 | if (unlikely(!skb)) | |
cda3696d JPM |
1818 | return; |
1819 | ||
1820 | /* Add message directly to receive queue if possible */ | |
c637c103 | 1821 | if (!sock_owned_by_user(sk)) { |
f1d048f2 | 1822 | filter_rcv(sk, skb, xmitq); |
cda3696d | 1823 | continue; |
c637c103 | 1824 | } |
cda3696d JPM |
1825 | |
1826 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 | 1827 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
7c8bcfb1 | 1828 | if (!sk->sk_backlog.len) |
c637c103 JPM |
1829 | atomic_set(dcnt, 0); |
1830 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1831 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1832 | continue; | |
cda3696d JPM |
1833 | |
1834 | /* Overload => reject message back to sender */ | |
f1d048f2 JPM |
1835 | onode = tipc_own_addr(sock_net(sk)); |
1836 | if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) | |
1837 | __skb_queue_tail(xmitq, skb); | |
cda3696d | 1838 | break; |
c637c103 | 1839 | } |
d570d864 JPM |
1840 | } |
1841 | ||
0c3141e9 | 1842 | /** |
c637c103 JPM |
1843 | * tipc_sk_rcv - handle a chain of incoming buffers |
1844 | * @inputq: buffer list containing the buffers | |
1845 | * Consumes all buffers in list until inputq is empty | |
1846 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 1847 | */ |
cda3696d | 1848 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1849 | { |
f1d048f2 | 1850 | struct sk_buff_head xmitq; |
c637c103 | 1851 | u32 dnode, dport = 0; |
9871b27f | 1852 | int err; |
9816f061 | 1853 | struct tipc_sock *tsk; |
9816f061 | 1854 | struct sock *sk; |
cda3696d | 1855 | struct sk_buff *skb; |
9816f061 | 1856 | |
f1d048f2 | 1857 | __skb_queue_head_init(&xmitq); |
c637c103 | 1858 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
1859 | dport = tipc_skb_peek_port(inputq, dport); |
1860 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 1861 | |
c637c103 JPM |
1862 | if (likely(tsk)) { |
1863 | sk = &tsk->sk; | |
1864 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
f1d048f2 | 1865 | tipc_sk_enqueue(inputq, sk, dport, &xmitq); |
c637c103 | 1866 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 | 1867 | } |
f1d048f2 JPM |
1868 | /* Send pending response/rejected messages, if any */ |
1869 | while ((skb = __skb_dequeue(&xmitq))) { | |
1870 | dnode = msg_destnode(buf_msg(skb)); | |
1871 | tipc_node_xmit_skb(net, skb, dnode, dport); | |
1872 | } | |
c637c103 | 1873 | sock_put(sk); |
c637c103 | 1874 | continue; |
c637c103 | 1875 | } |
cda3696d JPM |
1876 | |
1877 | /* No destination socket => dequeue skb if still there */ | |
1878 | skb = tipc_skb_dequeue(inputq, dport); | |
1879 | if (!skb) | |
1880 | return; | |
1881 | ||
1882 | /* Try secondary lookup if unresolved named message */ | |
1883 | err = TIPC_ERR_NO_PORT; | |
1884 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
1885 | goto xmit; | |
1886 | ||
1887 | /* Prepare for message rejection */ | |
1888 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 1889 | continue; |
e3a77561 | 1890 | xmit: |
cda3696d | 1891 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 1892 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 1893 | } |
b97bf3fd PL |
1894 | } |
1895 | ||
78eb3a53 YX |
1896 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1897 | { | |
1898 | struct sock *sk = sock->sk; | |
1899 | DEFINE_WAIT(wait); | |
1900 | int done; | |
1901 | ||
1902 | do { | |
1903 | int err = sock_error(sk); | |
1904 | if (err) | |
1905 | return err; | |
1906 | if (!*timeo_p) | |
1907 | return -ETIMEDOUT; | |
1908 | if (signal_pending(current)) | |
1909 | return sock_intr_errno(*timeo_p); | |
1910 | ||
1911 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1912 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1913 | finish_wait(sk_sleep(sk), &wait); | |
1914 | } while (!done); | |
1915 | return 0; | |
1916 | } | |
1917 | ||
b97bf3fd | 1918 | /** |
247f0f3c | 1919 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1920 | * @sock: socket structure |
1921 | * @dest: socket address for destination port | |
1922 | * @destlen: size of socket address data structure | |
0c3141e9 | 1923 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1924 | * |
1925 | * Returns 0 on success, errno otherwise | |
1926 | */ | |
247f0f3c YX |
1927 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1928 | int destlen, int flags) | |
b97bf3fd | 1929 | { |
0c3141e9 | 1930 | struct sock *sk = sock->sk; |
f2f8036e | 1931 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1932 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1933 | struct msghdr m = {NULL,}; | |
f2f8036e | 1934 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
78eb3a53 | 1935 | socket_state previous; |
f2f8036e | 1936 | int res = 0; |
b89741a0 | 1937 | |
0c3141e9 AS |
1938 | lock_sock(sk); |
1939 | ||
f2f8036e | 1940 | /* DGRAM/RDM connect(), just save the destaddr */ |
0c3141e9 | 1941 | if (sock->state == SS_READY) { |
f2f8036e | 1942 | if (dst->family == AF_UNSPEC) { |
aeda16b6 | 1943 | memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc)); |
610600c8 SL |
1944 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1945 | res = -EINVAL; | |
f2f8036e | 1946 | } else { |
aeda16b6 | 1947 | memcpy(&tsk->peer, dest, destlen); |
f2f8036e | 1948 | } |
0c3141e9 AS |
1949 | goto exit; |
1950 | } | |
b89741a0 | 1951 | |
b89741a0 AS |
1952 | /* |
1953 | * Reject connection attempt using multicast address | |
1954 | * | |
1955 | * Note: send_msg() validates the rest of the address fields, | |
1956 | * so there's no need to do it here | |
1957 | */ | |
0c3141e9 AS |
1958 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1959 | res = -EINVAL; | |
1960 | goto exit; | |
1961 | } | |
1962 | ||
78eb3a53 | 1963 | previous = sock->state; |
584d24b3 YX |
1964 | switch (sock->state) { |
1965 | case SS_UNCONNECTED: | |
1966 | /* Send a 'SYN-' to destination */ | |
1967 | m.msg_name = dest; | |
1968 | m.msg_namelen = destlen; | |
1969 | ||
1970 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1971 | * indicate send_msg() is never blocked. | |
1972 | */ | |
1973 | if (!timeout) | |
1974 | m.msg_flags = MSG_DONTWAIT; | |
1975 | ||
39a0295f | 1976 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1977 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1978 | goto exit; | |
1979 | ||
1980 | /* Just entered SS_CONNECTING state; the only | |
1981 | * difference is that return value in non-blocking | |
1982 | * case is EINPROGRESS, rather than EALREADY. | |
1983 | */ | |
1984 | res = -EINPROGRESS; | |
584d24b3 | 1985 | case SS_CONNECTING: |
78eb3a53 YX |
1986 | if (previous == SS_CONNECTING) |
1987 | res = -EALREADY; | |
1988 | if (!timeout) | |
1989 | goto exit; | |
1990 | timeout = msecs_to_jiffies(timeout); | |
1991 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1992 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1993 | break; |
1994 | case SS_CONNECTED: | |
1995 | res = -EISCONN; | |
1996 | break; | |
1997 | default: | |
1998 | res = -EINVAL; | |
78eb3a53 | 1999 | break; |
b89741a0 | 2000 | } |
0c3141e9 AS |
2001 | exit: |
2002 | release_sock(sk); | |
b89741a0 | 2003 | return res; |
b97bf3fd PL |
2004 | } |
2005 | ||
c4307285 | 2006 | /** |
247f0f3c | 2007 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
2008 | * @sock: socket structure |
2009 | * @len: (unused) | |
c4307285 | 2010 | * |
b97bf3fd PL |
2011 | * Returns 0 on success, errno otherwise |
2012 | */ | |
247f0f3c | 2013 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 2014 | { |
0c3141e9 AS |
2015 | struct sock *sk = sock->sk; |
2016 | int res; | |
2017 | ||
2018 | lock_sock(sk); | |
b97bf3fd | 2019 | |
245f3d34 | 2020 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
2021 | res = -EINVAL; |
2022 | else { | |
2023 | sock->state = SS_LISTENING; | |
2024 | res = 0; | |
2025 | } | |
2026 | ||
2027 | release_sock(sk); | |
2028 | return res; | |
b97bf3fd PL |
2029 | } |
2030 | ||
6398e23c YX |
2031 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
2032 | { | |
2033 | struct sock *sk = sock->sk; | |
2034 | DEFINE_WAIT(wait); | |
2035 | int err; | |
2036 | ||
2037 | /* True wake-one mechanism for incoming connections: only | |
2038 | * one process gets woken up, not the 'whole herd'. | |
2039 | * Since we do not 'race & poll' for established sockets | |
2040 | * anymore, the common case will execute the loop only once. | |
2041 | */ | |
2042 | for (;;) { | |
2043 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
2044 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 2045 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
2046 | release_sock(sk); |
2047 | timeo = schedule_timeout(timeo); | |
2048 | lock_sock(sk); | |
2049 | } | |
2050 | err = 0; | |
2051 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
2052 | break; | |
2053 | err = -EINVAL; | |
2054 | if (sock->state != SS_LISTENING) | |
2055 | break; | |
6398e23c YX |
2056 | err = -EAGAIN; |
2057 | if (!timeo) | |
2058 | break; | |
143fe22f EH |
2059 | err = sock_intr_errno(timeo); |
2060 | if (signal_pending(current)) | |
2061 | break; | |
6398e23c YX |
2062 | } |
2063 | finish_wait(sk_sleep(sk), &wait); | |
2064 | return err; | |
2065 | } | |
2066 | ||
c4307285 | 2067 | /** |
247f0f3c | 2068 | * tipc_accept - wait for connection request |
b97bf3fd PL |
2069 | * @sock: listening socket |
2070 | * @newsock: new socket that is to be connected | |
2071 | * @flags: file-related flags associated with socket | |
c4307285 | 2072 | * |
b97bf3fd PL |
2073 | * Returns 0 on success, errno otherwise |
2074 | */ | |
247f0f3c | 2075 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 2076 | { |
0fef8f20 | 2077 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2078 | struct sk_buff *buf; |
301bae56 | 2079 | struct tipc_sock *new_tsock; |
0fef8f20 | 2080 | struct tipc_msg *msg; |
6398e23c | 2081 | long timeo; |
0c3141e9 | 2082 | int res; |
b97bf3fd | 2083 | |
0c3141e9 | 2084 | lock_sock(sk); |
b97bf3fd | 2085 | |
0c3141e9 AS |
2086 | if (sock->state != SS_LISTENING) { |
2087 | res = -EINVAL; | |
b97bf3fd PL |
2088 | goto exit; |
2089 | } | |
6398e23c YX |
2090 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2091 | res = tipc_wait_for_accept(sock, timeo); | |
2092 | if (res) | |
2093 | goto exit; | |
0c3141e9 AS |
2094 | |
2095 | buf = skb_peek(&sk->sk_receive_queue); | |
2096 | ||
cb5da847 | 2097 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 0); |
0fef8f20 PG |
2098 | if (res) |
2099 | goto exit; | |
fdd75ea8 | 2100 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2101 | |
0fef8f20 | 2102 | new_sk = new_sock->sk; |
301bae56 | 2103 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2104 | msg = buf_msg(buf); |
b97bf3fd | 2105 | |
0fef8f20 PG |
2106 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2107 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2108 | ||
2109 | /* | |
2110 | * Reject any stray messages received by new socket | |
2111 | * before the socket lock was taken (very, very unlikely) | |
2112 | */ | |
2e84c60b | 2113 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2114 | |
2115 | /* Connect new socket to it's peer */ | |
301bae56 | 2116 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2117 | new_sock->state = SS_CONNECTED; |
2118 | ||
301bae56 | 2119 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2120 | if (msg_named(msg)) { |
301bae56 JPM |
2121 | new_tsock->conn_type = msg_nametype(msg); |
2122 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2123 | } |
0fef8f20 PG |
2124 | |
2125 | /* | |
2126 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2127 | * Respond to 'SYN+' by queuing it on new socket. | |
2128 | */ | |
2129 | if (!msg_data_sz(msg)) { | |
2130 | struct msghdr m = {NULL,}; | |
2131 | ||
2e84c60b | 2132 | tsk_advance_rx_queue(sk); |
39a0295f | 2133 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2134 | } else { |
2135 | __skb_dequeue(&sk->sk_receive_queue); | |
2136 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2137 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2138 | } |
2139 | release_sock(new_sk); | |
b97bf3fd | 2140 | exit: |
0c3141e9 | 2141 | release_sock(sk); |
b97bf3fd PL |
2142 | return res; |
2143 | } | |
2144 | ||
2145 | /** | |
247f0f3c | 2146 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2147 | * @sock: socket structure |
e247a8f5 | 2148 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2149 | * |
2150 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2151 | * |
b97bf3fd PL |
2152 | * Returns 0 on success, errno otherwise |
2153 | */ | |
247f0f3c | 2154 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2155 | { |
0c3141e9 | 2156 | struct sock *sk = sock->sk; |
f2f9800d | 2157 | struct net *net = sock_net(sk); |
58ed9442 | 2158 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2159 | struct sk_buff *skb; |
cda3696d JPM |
2160 | u32 dnode = tsk_peer_node(tsk); |
2161 | u32 dport = tsk_peer_port(tsk); | |
2162 | u32 onode = tipc_own_addr(net); | |
2163 | u32 oport = tsk->portid; | |
b97bf3fd PL |
2164 | int res; |
2165 | ||
e247a8f5 AS |
2166 | if (how != SHUT_RDWR) |
2167 | return -EINVAL; | |
b97bf3fd | 2168 | |
0c3141e9 | 2169 | lock_sock(sk); |
b97bf3fd PL |
2170 | |
2171 | switch (sock->state) { | |
0c3141e9 | 2172 | case SS_CONNECTING: |
b97bf3fd PL |
2173 | case SS_CONNECTED: |
2174 | ||
b97bf3fd | 2175 | restart: |
bcd3ffd4 JPM |
2176 | dnode = tsk_peer_node(tsk); |
2177 | ||
617d3c7a | 2178 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2179 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2180 | if (skb) { | |
ba8aebe9 | 2181 | if (TIPC_SKB_CB(skb)->bytes_read) { |
a6ca1094 | 2182 | kfree_skb(skb); |
b97bf3fd PL |
2183 | goto restart; |
2184 | } | |
bcd3ffd4 | 2185 | tipc_sk_respond(sk, skb, TIPC_CONN_SHUTDOWN); |
0c3141e9 | 2186 | } else { |
c5898636 | 2187 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
80e44c22 | 2188 | TIPC_CONN_MSG, SHORT_H_SIZE, |
cda3696d JPM |
2189 | 0, dnode, onode, dport, oport, |
2190 | TIPC_CONN_SHUTDOWN); | |
d2fbdf76 VN |
2191 | if (skb) |
2192 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); | |
b97bf3fd | 2193 | } |
0c3141e9 | 2194 | sock->state = SS_DISCONNECTING; |
f2f9800d | 2195 | tipc_node_remove_conn(net, dnode, tsk->portid); |
b97bf3fd PL |
2196 | /* fall through */ |
2197 | ||
2198 | case SS_DISCONNECTING: | |
2199 | ||
75031151 | 2200 | /* Discard any unreceived messages */ |
57467e56 | 2201 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2202 | |
2203 | /* Wake up anyone sleeping in poll */ | |
2204 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2205 | res = 0; |
2206 | break; | |
2207 | ||
2208 | default: | |
2209 | res = -ENOTCONN; | |
2210 | } | |
2211 | ||
0c3141e9 | 2212 | release_sock(sk); |
b97bf3fd PL |
2213 | return res; |
2214 | } | |
2215 | ||
f2f2a96a | 2216 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2217 | { |
f2f2a96a YX |
2218 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2219 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2220 | struct sk_buff *skb = NULL; |
57289015 | 2221 | u32 peer_port, peer_node; |
c5898636 | 2222 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2223 | |
6c9808ce | 2224 | bh_lock_sock(sk); |
d6fb7e9c | 2225 | if (!tipc_sk_connected(sk)) { |
6c9808ce JPM |
2226 | bh_unlock_sock(sk); |
2227 | goto exit; | |
57289015 | 2228 | } |
301bae56 JPM |
2229 | peer_port = tsk_peer_port(tsk); |
2230 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2231 | |
301bae56 | 2232 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
b3be5e3e EH |
2233 | if (!sock_owned_by_user(sk)) { |
2234 | sk->sk_socket->state = SS_DISCONNECTING; | |
b3be5e3e EH |
2235 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), |
2236 | tsk_peer_port(tsk)); | |
2237 | sk->sk_state_change(sk); | |
2238 | } else { | |
2239 | /* Try again later */ | |
2240 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2241 | } | |
2242 | ||
57289015 | 2243 | } else { |
c5898636 JPM |
2244 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
2245 | INT_H_SIZE, 0, peer_node, own_node, | |
f2f2a96a | 2246 | peer_port, tsk->portid, TIPC_OK); |
301bae56 | 2247 | tsk->probing_state = TIPC_CONN_PROBING; |
3721e9c7 | 2248 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2249 | } |
2250 | bh_unlock_sock(sk); | |
a6ca1094 | 2251 | if (skb) |
af9b028e | 2252 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2253 | exit: |
07f6c4bc | 2254 | sock_put(sk); |
57289015 JPM |
2255 | } |
2256 | ||
301bae56 | 2257 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2258 | struct tipc_name_seq const *seq) |
2259 | { | |
d6fb7e9c PB |
2260 | struct sock *sk = &tsk->sk; |
2261 | struct net *net = sock_net(sk); | |
0fc87aae JPM |
2262 | struct publication *publ; |
2263 | u32 key; | |
2264 | ||
d6fb7e9c | 2265 | if (tipc_sk_connected(sk)) |
0fc87aae | 2266 | return -EINVAL; |
07f6c4bc YX |
2267 | key = tsk->portid + tsk->pub_count + 1; |
2268 | if (key == tsk->portid) | |
0fc87aae JPM |
2269 | return -EADDRINUSE; |
2270 | ||
f2f9800d | 2271 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2272 | scope, tsk->portid, key); |
0fc87aae JPM |
2273 | if (unlikely(!publ)) |
2274 | return -EINVAL; | |
2275 | ||
301bae56 JPM |
2276 | list_add(&publ->pport_list, &tsk->publications); |
2277 | tsk->pub_count++; | |
2278 | tsk->published = 1; | |
0fc87aae JPM |
2279 | return 0; |
2280 | } | |
2281 | ||
301bae56 | 2282 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2283 | struct tipc_name_seq const *seq) |
2284 | { | |
f2f9800d | 2285 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2286 | struct publication *publ; |
2287 | struct publication *safe; | |
2288 | int rc = -EINVAL; | |
2289 | ||
301bae56 | 2290 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2291 | if (seq) { |
2292 | if (publ->scope != scope) | |
2293 | continue; | |
2294 | if (publ->type != seq->type) | |
2295 | continue; | |
2296 | if (publ->lower != seq->lower) | |
2297 | continue; | |
2298 | if (publ->upper != seq->upper) | |
2299 | break; | |
f2f9800d | 2300 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2301 | publ->ref, publ->key); |
2302 | rc = 0; | |
2303 | break; | |
2304 | } | |
f2f9800d | 2305 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2306 | publ->ref, publ->key); |
2307 | rc = 0; | |
2308 | } | |
301bae56 JPM |
2309 | if (list_empty(&tsk->publications)) |
2310 | tsk->published = 0; | |
0fc87aae JPM |
2311 | return rc; |
2312 | } | |
2313 | ||
5a9ee0be JPM |
2314 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2315 | * when we go from standalone to network mode. | |
2316 | */ | |
e05b31f4 | 2317 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2318 | { |
e05b31f4 | 2319 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2320 | const struct bucket_table *tbl; |
2321 | struct rhash_head *pos; | |
2322 | struct tipc_sock *tsk; | |
5a9ee0be | 2323 | struct tipc_msg *msg; |
07f6c4bc | 2324 | int i; |
5a9ee0be | 2325 | |
07f6c4bc | 2326 | rcu_read_lock(); |
e05b31f4 | 2327 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2328 | for (i = 0; i < tbl->size; i++) { |
2329 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2330 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2331 | msg = &tsk->phdr; | |
34747539 YX |
2332 | msg_set_prevnode(msg, tn->own_addr); |
2333 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2334 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2335 | } | |
5a9ee0be | 2336 | } |
07f6c4bc | 2337 | rcu_read_unlock(); |
5a9ee0be JPM |
2338 | } |
2339 | ||
e05b31f4 | 2340 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2341 | { |
e05b31f4 | 2342 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2343 | struct tipc_sock *tsk; |
808d90f9 | 2344 | |
07f6c4bc | 2345 | rcu_read_lock(); |
6cca7289 | 2346 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2347 | if (tsk) |
2348 | sock_hold(&tsk->sk); | |
2349 | rcu_read_unlock(); | |
808d90f9 | 2350 | |
07f6c4bc | 2351 | return tsk; |
808d90f9 JPM |
2352 | } |
2353 | ||
07f6c4bc | 2354 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2355 | { |
e05b31f4 YX |
2356 | struct sock *sk = &tsk->sk; |
2357 | struct net *net = sock_net(sk); | |
2358 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2359 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2360 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2361 | |
07f6c4bc YX |
2362 | while (remaining--) { |
2363 | portid++; | |
2364 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2365 | portid = TIPC_MIN_PORT; | |
2366 | tsk->portid = portid; | |
2367 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2368 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2369 | tsk_rht_params)) | |
07f6c4bc YX |
2370 | return 0; |
2371 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2372 | } |
2373 | ||
07f6c4bc | 2374 | return -1; |
808d90f9 JPM |
2375 | } |
2376 | ||
07f6c4bc | 2377 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2378 | { |
07f6c4bc | 2379 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2380 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2381 | |
6cca7289 | 2382 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2383 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2384 | __sock_put(sk); | |
808d90f9 | 2385 | } |
808d90f9 JPM |
2386 | } |
2387 | ||
6cca7289 HX |
2388 | static const struct rhashtable_params tsk_rht_params = { |
2389 | .nelem_hint = 192, | |
2390 | .head_offset = offsetof(struct tipc_sock, node), | |
2391 | .key_offset = offsetof(struct tipc_sock, portid), | |
2392 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2393 | .max_size = 1048576, |
2394 | .min_size = 256, | |
b5e2c150 | 2395 | .automatic_shrinking = true, |
6cca7289 HX |
2396 | }; |
2397 | ||
e05b31f4 | 2398 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2399 | { |
e05b31f4 | 2400 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2401 | |
2402 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2403 | } |
2404 | ||
e05b31f4 | 2405 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2406 | { |
e05b31f4 YX |
2407 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2408 | ||
07f6c4bc YX |
2409 | /* Wait for socket readers to complete */ |
2410 | synchronize_net(); | |
808d90f9 | 2411 | |
e05b31f4 | 2412 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2413 | } |
2414 | ||
b97bf3fd | 2415 | /** |
247f0f3c | 2416 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2417 | * @sock: socket structure |
2418 | * @lvl: option level | |
2419 | * @opt: option identifier | |
2420 | * @ov: pointer to new option value | |
2421 | * @ol: length of option value | |
c4307285 YH |
2422 | * |
2423 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2424 | * (to ease compatibility). |
c4307285 | 2425 | * |
b97bf3fd PL |
2426 | * Returns 0 on success, errno otherwise |
2427 | */ | |
247f0f3c YX |
2428 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2429 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2430 | { |
0c3141e9 | 2431 | struct sock *sk = sock->sk; |
58ed9442 | 2432 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2433 | u32 value; |
2434 | int res; | |
2435 | ||
c4307285 YH |
2436 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2437 | return 0; | |
b97bf3fd PL |
2438 | if (lvl != SOL_TIPC) |
2439 | return -ENOPROTOOPT; | |
2440 | if (ol < sizeof(value)) | |
2441 | return -EINVAL; | |
2db9983a AS |
2442 | res = get_user(value, (u32 __user *)ov); |
2443 | if (res) | |
b97bf3fd PL |
2444 | return res; |
2445 | ||
0c3141e9 | 2446 | lock_sock(sk); |
c4307285 | 2447 | |
b97bf3fd PL |
2448 | switch (opt) { |
2449 | case TIPC_IMPORTANCE: | |
301bae56 | 2450 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2451 | break; |
2452 | case TIPC_SRC_DROPPABLE: | |
2453 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2454 | tsk_set_unreliable(tsk, value); |
c4307285 | 2455 | else |
b97bf3fd PL |
2456 | res = -ENOPROTOOPT; |
2457 | break; | |
2458 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2459 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2460 | break; |
2461 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2462 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2463 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2464 | break; |
2465 | default: | |
2466 | res = -EINVAL; | |
2467 | } | |
2468 | ||
0c3141e9 AS |
2469 | release_sock(sk); |
2470 | ||
b97bf3fd PL |
2471 | return res; |
2472 | } | |
2473 | ||
2474 | /** | |
247f0f3c | 2475 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2476 | * @sock: socket structure |
2477 | * @lvl: option level | |
2478 | * @opt: option identifier | |
2479 | * @ov: receptacle for option value | |
2480 | * @ol: receptacle for length of option value | |
c4307285 YH |
2481 | * |
2482 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2483 | * (to ease compatibility). |
c4307285 | 2484 | * |
b97bf3fd PL |
2485 | * Returns 0 on success, errno otherwise |
2486 | */ | |
247f0f3c YX |
2487 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2488 | char __user *ov, int __user *ol) | |
b97bf3fd | 2489 | { |
0c3141e9 | 2490 | struct sock *sk = sock->sk; |
58ed9442 | 2491 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2492 | int len; |
b97bf3fd | 2493 | u32 value; |
c4307285 | 2494 | int res; |
b97bf3fd | 2495 | |
c4307285 YH |
2496 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2497 | return put_user(0, ol); | |
b97bf3fd PL |
2498 | if (lvl != SOL_TIPC) |
2499 | return -ENOPROTOOPT; | |
2db9983a AS |
2500 | res = get_user(len, ol); |
2501 | if (res) | |
c4307285 | 2502 | return res; |
b97bf3fd | 2503 | |
0c3141e9 | 2504 | lock_sock(sk); |
b97bf3fd PL |
2505 | |
2506 | switch (opt) { | |
2507 | case TIPC_IMPORTANCE: | |
301bae56 | 2508 | value = tsk_importance(tsk); |
b97bf3fd PL |
2509 | break; |
2510 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2511 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2512 | break; |
2513 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2514 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2515 | break; |
2516 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2517 | value = tsk->conn_timeout; |
0c3141e9 | 2518 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2519 | break; |
0e65967e | 2520 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2521 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2522 | break; |
0e65967e | 2523 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2524 | value = skb_queue_len(&sk->sk_receive_queue); |
2525 | break; | |
b97bf3fd PL |
2526 | default: |
2527 | res = -EINVAL; | |
2528 | } | |
2529 | ||
0c3141e9 AS |
2530 | release_sock(sk); |
2531 | ||
25860c3b PG |
2532 | if (res) |
2533 | return res; /* "get" failed */ | |
b97bf3fd | 2534 | |
25860c3b PG |
2535 | if (len < sizeof(value)) |
2536 | return -EINVAL; | |
2537 | ||
2538 | if (copy_to_user(ov, &value, sizeof(value))) | |
2539 | return -EFAULT; | |
2540 | ||
2541 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2542 | } |
2543 | ||
f2f9800d | 2544 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2545 | { |
f2f9800d | 2546 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2547 | struct tipc_sioc_ln_req lnr; |
2548 | void __user *argp = (void __user *)arg; | |
2549 | ||
2550 | switch (cmd) { | |
2551 | case SIOCGETLINKNAME: | |
2552 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2553 | return -EFAULT; | |
f2f9800d YX |
2554 | if (!tipc_node_get_linkname(sock_net(sk), |
2555 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2556 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2557 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2558 | return -EFAULT; | |
2559 | return 0; | |
2560 | } | |
2561 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2562 | default: |
2563 | return -ENOIOCTLCMD; | |
2564 | } | |
2565 | } | |
2566 | ||
ae86b9e3 BH |
2567 | /* Protocol switches for the various types of TIPC sockets */ |
2568 | ||
bca65eae | 2569 | static const struct proto_ops msg_ops = { |
0e65967e | 2570 | .owner = THIS_MODULE, |
b97bf3fd | 2571 | .family = AF_TIPC, |
247f0f3c YX |
2572 | .release = tipc_release, |
2573 | .bind = tipc_bind, | |
2574 | .connect = tipc_connect, | |
5eee6a6d | 2575 | .socketpair = sock_no_socketpair, |
245f3d34 | 2576 | .accept = sock_no_accept, |
247f0f3c YX |
2577 | .getname = tipc_getname, |
2578 | .poll = tipc_poll, | |
78acb1f9 | 2579 | .ioctl = tipc_ioctl, |
245f3d34 | 2580 | .listen = sock_no_listen, |
247f0f3c YX |
2581 | .shutdown = tipc_shutdown, |
2582 | .setsockopt = tipc_setsockopt, | |
2583 | .getsockopt = tipc_getsockopt, | |
2584 | .sendmsg = tipc_sendmsg, | |
2585 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2586 | .mmap = sock_no_mmap, |
2587 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2588 | }; |
2589 | ||
bca65eae | 2590 | static const struct proto_ops packet_ops = { |
0e65967e | 2591 | .owner = THIS_MODULE, |
b97bf3fd | 2592 | .family = AF_TIPC, |
247f0f3c YX |
2593 | .release = tipc_release, |
2594 | .bind = tipc_bind, | |
2595 | .connect = tipc_connect, | |
5eee6a6d | 2596 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2597 | .accept = tipc_accept, |
2598 | .getname = tipc_getname, | |
2599 | .poll = tipc_poll, | |
78acb1f9 | 2600 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2601 | .listen = tipc_listen, |
2602 | .shutdown = tipc_shutdown, | |
2603 | .setsockopt = tipc_setsockopt, | |
2604 | .getsockopt = tipc_getsockopt, | |
2605 | .sendmsg = tipc_send_packet, | |
2606 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2607 | .mmap = sock_no_mmap, |
2608 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2609 | }; |
2610 | ||
bca65eae | 2611 | static const struct proto_ops stream_ops = { |
0e65967e | 2612 | .owner = THIS_MODULE, |
b97bf3fd | 2613 | .family = AF_TIPC, |
247f0f3c YX |
2614 | .release = tipc_release, |
2615 | .bind = tipc_bind, | |
2616 | .connect = tipc_connect, | |
5eee6a6d | 2617 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2618 | .accept = tipc_accept, |
2619 | .getname = tipc_getname, | |
2620 | .poll = tipc_poll, | |
78acb1f9 | 2621 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2622 | .listen = tipc_listen, |
2623 | .shutdown = tipc_shutdown, | |
2624 | .setsockopt = tipc_setsockopt, | |
2625 | .getsockopt = tipc_getsockopt, | |
2626 | .sendmsg = tipc_send_stream, | |
2627 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2628 | .mmap = sock_no_mmap, |
2629 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2630 | }; |
2631 | ||
bca65eae | 2632 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2633 | .owner = THIS_MODULE, |
b97bf3fd | 2634 | .family = AF_TIPC, |
c5fa7b3c | 2635 | .create = tipc_sk_create |
b97bf3fd PL |
2636 | }; |
2637 | ||
2638 | static struct proto tipc_proto = { | |
2639 | .name = "TIPC", | |
2640 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2641 | .obj_size = sizeof(struct tipc_sock), |
2642 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2643 | }; |
2644 | ||
2645 | /** | |
4323add6 | 2646 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2647 | * |
b97bf3fd PL |
2648 | * Returns 0 on success, errno otherwise |
2649 | */ | |
4323add6 | 2650 | int tipc_socket_init(void) |
b97bf3fd PL |
2651 | { |
2652 | int res; | |
2653 | ||
c4307285 | 2654 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2655 | if (res) { |
2cf8aa19 | 2656 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2657 | goto out; |
2658 | } | |
2659 | ||
2660 | res = sock_register(&tipc_family_ops); | |
2661 | if (res) { | |
2cf8aa19 | 2662 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2663 | proto_unregister(&tipc_proto); |
2664 | goto out; | |
2665 | } | |
b97bf3fd PL |
2666 | out: |
2667 | return res; | |
2668 | } | |
2669 | ||
2670 | /** | |
4323add6 | 2671 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2672 | */ |
4323add6 | 2673 | void tipc_socket_stop(void) |
b97bf3fd | 2674 | { |
b97bf3fd PL |
2675 | sock_unregister(tipc_family_ops.family); |
2676 | proto_unregister(&tipc_proto); | |
2677 | } | |
34b78a12 RA |
2678 | |
2679 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2680 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2681 | { |
2682 | u32 peer_node; | |
2683 | u32 peer_port; | |
2684 | struct nlattr *nest; | |
2685 | ||
2686 | peer_node = tsk_peer_node(tsk); | |
2687 | peer_port = tsk_peer_port(tsk); | |
2688 | ||
2689 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2690 | ||
2691 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2692 | goto msg_full; | |
2693 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2694 | goto msg_full; | |
2695 | ||
2696 | if (tsk->conn_type != 0) { | |
2697 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2698 | goto msg_full; | |
2699 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2700 | goto msg_full; | |
2701 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2702 | goto msg_full; | |
2703 | } | |
2704 | nla_nest_end(skb, nest); | |
2705 | ||
2706 | return 0; | |
2707 | ||
2708 | msg_full: | |
2709 | nla_nest_cancel(skb, nest); | |
2710 | ||
2711 | return -EMSGSIZE; | |
2712 | } | |
2713 | ||
2714 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2715 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2716 | struct tipc_sock *tsk) | |
34b78a12 RA |
2717 | { |
2718 | int err; | |
2719 | void *hdr; | |
2720 | struct nlattr *attrs; | |
34747539 YX |
2721 | struct net *net = sock_net(skb->sk); |
2722 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6fb7e9c | 2723 | struct sock *sk = &tsk->sk; |
34b78a12 RA |
2724 | |
2725 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2726 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2727 | if (!hdr) |
2728 | goto msg_cancel; | |
2729 | ||
2730 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2731 | if (!attrs) | |
2732 | goto genlmsg_cancel; | |
07f6c4bc | 2733 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2734 | goto attr_msg_cancel; |
34747539 | 2735 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2736 | goto attr_msg_cancel; |
2737 | ||
d6fb7e9c | 2738 | if (tipc_sk_connected(sk)) { |
34b78a12 RA |
2739 | err = __tipc_nl_add_sk_con(skb, tsk); |
2740 | if (err) | |
2741 | goto attr_msg_cancel; | |
2742 | } else if (!list_empty(&tsk->publications)) { | |
2743 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2744 | goto attr_msg_cancel; | |
2745 | } | |
2746 | nla_nest_end(skb, attrs); | |
2747 | genlmsg_end(skb, hdr); | |
2748 | ||
2749 | return 0; | |
2750 | ||
2751 | attr_msg_cancel: | |
2752 | nla_nest_cancel(skb, attrs); | |
2753 | genlmsg_cancel: | |
2754 | genlmsg_cancel(skb, hdr); | |
2755 | msg_cancel: | |
2756 | return -EMSGSIZE; | |
2757 | } | |
2758 | ||
2759 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2760 | { | |
2761 | int err; | |
2762 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2763 | const struct bucket_table *tbl; |
2764 | struct rhash_head *pos; | |
e05b31f4 YX |
2765 | struct net *net = sock_net(skb->sk); |
2766 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2767 | u32 tbl_id = cb->args[0]; |
2768 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2769 | |
07f6c4bc | 2770 | rcu_read_lock(); |
e05b31f4 | 2771 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2772 | for (; tbl_id < tbl->size; tbl_id++) { |
2773 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2774 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2775 | if (prev_portid && prev_portid != tsk->portid) { |
2776 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2777 | continue; | |
2778 | } | |
2779 | ||
07f6c4bc | 2780 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2781 | if (err) { |
2782 | prev_portid = tsk->portid; | |
2783 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2784 | goto out; | |
2785 | } | |
2786 | prev_portid = 0; | |
07f6c4bc | 2787 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2788 | } |
34b78a12 | 2789 | } |
d6e164e3 | 2790 | out: |
07f6c4bc | 2791 | rcu_read_unlock(); |
d6e164e3 RA |
2792 | cb->args[0] = tbl_id; |
2793 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2794 | |
2795 | return skb->len; | |
2796 | } | |
1a1a143d RA |
2797 | |
2798 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2799 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2800 | struct netlink_callback *cb, | |
2801 | struct publication *publ) | |
1a1a143d RA |
2802 | { |
2803 | void *hdr; | |
2804 | struct nlattr *attrs; | |
2805 | ||
2806 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2807 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2808 | if (!hdr) |
2809 | goto msg_cancel; | |
2810 | ||
2811 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2812 | if (!attrs) | |
2813 | goto genlmsg_cancel; | |
2814 | ||
2815 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2816 | goto attr_msg_cancel; | |
2817 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2818 | goto attr_msg_cancel; | |
2819 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2820 | goto attr_msg_cancel; | |
2821 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2822 | goto attr_msg_cancel; | |
2823 | ||
2824 | nla_nest_end(skb, attrs); | |
2825 | genlmsg_end(skb, hdr); | |
2826 | ||
2827 | return 0; | |
2828 | ||
2829 | attr_msg_cancel: | |
2830 | nla_nest_cancel(skb, attrs); | |
2831 | genlmsg_cancel: | |
2832 | genlmsg_cancel(skb, hdr); | |
2833 | msg_cancel: | |
2834 | return -EMSGSIZE; | |
2835 | } | |
2836 | ||
2837 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2838 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2839 | struct netlink_callback *cb, | |
2840 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2841 | { |
2842 | int err; | |
2843 | struct publication *p; | |
2844 | ||
2845 | if (*last_publ) { | |
2846 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2847 | if (p->key == *last_publ) | |
2848 | break; | |
2849 | } | |
2850 | if (p->key != *last_publ) { | |
2851 | /* We never set seq or call nl_dump_check_consistent() | |
2852 | * this means that setting prev_seq here will cause the | |
2853 | * consistence check to fail in the netlink callback | |
2854 | * handler. Resulting in the last NLMSG_DONE message | |
2855 | * having the NLM_F_DUMP_INTR flag set. | |
2856 | */ | |
2857 | cb->prev_seq = 1; | |
2858 | *last_publ = 0; | |
2859 | return -EPIPE; | |
2860 | } | |
2861 | } else { | |
2862 | p = list_first_entry(&tsk->publications, struct publication, | |
2863 | pport_list); | |
2864 | } | |
2865 | ||
2866 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2867 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2868 | if (err) { | |
2869 | *last_publ = p->key; | |
2870 | return err; | |
2871 | } | |
2872 | } | |
2873 | *last_publ = 0; | |
2874 | ||
2875 | return 0; | |
2876 | } | |
2877 | ||
2878 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2879 | { | |
2880 | int err; | |
07f6c4bc | 2881 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2882 | u32 last_publ = cb->args[1]; |
2883 | u32 done = cb->args[2]; | |
e05b31f4 | 2884 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2885 | struct tipc_sock *tsk; |
2886 | ||
07f6c4bc | 2887 | if (!tsk_portid) { |
1a1a143d RA |
2888 | struct nlattr **attrs; |
2889 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2890 | ||
2891 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2892 | if (err) | |
2893 | return err; | |
2894 | ||
45e093ae RA |
2895 | if (!attrs[TIPC_NLA_SOCK]) |
2896 | return -EINVAL; | |
2897 | ||
1a1a143d RA |
2898 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
2899 | attrs[TIPC_NLA_SOCK], | |
2900 | tipc_nl_sock_policy); | |
2901 | if (err) | |
2902 | return err; | |
2903 | ||
2904 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2905 | return -EINVAL; | |
2906 | ||
07f6c4bc | 2907 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2908 | } |
2909 | ||
2910 | if (done) | |
2911 | return 0; | |
2912 | ||
e05b31f4 | 2913 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2914 | if (!tsk) |
2915 | return -EINVAL; | |
2916 | ||
2917 | lock_sock(&tsk->sk); | |
2918 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2919 | if (!err) | |
2920 | done = 1; | |
2921 | release_sock(&tsk->sk); | |
07f6c4bc | 2922 | sock_put(&tsk->sk); |
1a1a143d | 2923 | |
07f6c4bc | 2924 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2925 | cb->args[1] = last_publ; |
2926 | cb->args[2] = done; | |
2927 | ||
2928 | return skb->len; | |
2929 | } |