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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" |
2cf8aa19 | 45 | |
07f6c4bc YX |
46 | #define SS_LISTENING -1 /* socket is listening */ |
47 | #define SS_READY -2 /* socket is connectionless */ | |
b97bf3fd | 48 | |
07f6c4bc | 49 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
2f55c437 | 50 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
07f6c4bc YX |
51 | #define TIPC_FWD_MSG 1 |
52 | #define TIPC_CONN_OK 0 | |
53 | #define TIPC_CONN_PROBING 1 | |
54 | #define TIPC_MAX_PORT 0xffffffff | |
55 | #define TIPC_MIN_PORT 1 | |
301bae56 JPM |
56 | |
57 | /** | |
58 | * struct tipc_sock - TIPC socket structure | |
59 | * @sk: socket - interacts with 'port' and with user via the socket API | |
60 | * @connected: non-zero if port is currently connected to a peer port | |
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 JPM |
66 | * @phdr: preformatted message header used when sending messages |
67 | * @port_list: adjacent ports in TIPC's global list of ports | |
68 | * @publications: list of publications for port | |
69 | * @pub_count: total # of publications port has made during its lifetime | |
70 | * @probing_state: | |
2f55c437 | 71 | * @probing_intv: |
301bae56 JPM |
72 | * @conn_timeout: the time we can wait for an unresponded setup request |
73 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue | |
74 | * @link_cong: non-zero if owner must sleep because of link congestion | |
75 | * @sent_unacked: # messages sent by socket, and not yet acked by peer | |
76 | * @rcv_unacked: # messages read by user, but not yet acked back to peer | |
f2f8036e | 77 | * @remote: 'connected' peer for dgram/rdm |
07f6c4bc YX |
78 | * @node: hash table node |
79 | * @rcu: rcu struct for tipc_sock | |
301bae56 JPM |
80 | */ |
81 | struct tipc_sock { | |
82 | struct sock sk; | |
83 | int connected; | |
84 | u32 conn_type; | |
85 | u32 conn_instance; | |
86 | int published; | |
87 | u32 max_pkt; | |
07f6c4bc | 88 | u32 portid; |
301bae56 JPM |
89 | struct tipc_msg phdr; |
90 | struct list_head sock_list; | |
91 | struct list_head publications; | |
92 | u32 pub_count; | |
93 | u32 probing_state; | |
2f55c437 | 94 | unsigned long probing_intv; |
301bae56 JPM |
95 | uint conn_timeout; |
96 | atomic_t dupl_rcvcnt; | |
97 | bool link_cong; | |
98 | uint sent_unacked; | |
99 | uint rcv_unacked; | |
f2f8036e | 100 | struct sockaddr_tipc remote; |
07f6c4bc YX |
101 | struct rhash_head node; |
102 | struct rcu_head rcu; | |
301bae56 | 103 | }; |
b97bf3fd | 104 | |
4f4482dc | 105 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
676d2369 | 106 | static void tipc_data_ready(struct sock *sk); |
f288bef4 | 107 | static void tipc_write_space(struct sock *sk); |
247f0f3c YX |
108 | static int tipc_release(struct socket *sock); |
109 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 110 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
f2f2a96a | 111 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 112 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 113 | struct tipc_name_seq const *seq); |
301bae56 | 114 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 115 | struct tipc_name_seq const *seq); |
e05b31f4 | 116 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
117 | static int tipc_sk_insert(struct tipc_sock *tsk); |
118 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
39a0295f YX |
119 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, |
120 | size_t dsz); | |
121 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); | |
b97bf3fd | 122 | |
bca65eae FW |
123 | static const struct proto_ops packet_ops; |
124 | static const struct proto_ops stream_ops; | |
125 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
126 | static struct proto tipc_proto; |
127 | ||
1a1a143d RA |
128 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
129 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, | |
130 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, | |
131 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, | |
132 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, | |
133 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } | |
134 | }; | |
135 | ||
6cca7289 HX |
136 | static const struct rhashtable_params tsk_rht_params; |
137 | ||
c4307285 | 138 | /* |
0c3141e9 AS |
139 | * Revised TIPC socket locking policy: |
140 | * | |
141 | * Most socket operations take the standard socket lock when they start | |
142 | * and hold it until they finish (or until they need to sleep). Acquiring | |
143 | * this lock grants the owner exclusive access to the fields of the socket | |
144 | * data structures, with the exception of the backlog queue. A few socket | |
145 | * operations can be done without taking the socket lock because they only | |
146 | * read socket information that never changes during the life of the socket. | |
147 | * | |
148 | * Socket operations may acquire the lock for the associated TIPC port if they | |
149 | * need to perform an operation on the port. If any routine needs to acquire | |
150 | * both the socket lock and the port lock it must take the socket lock first | |
151 | * to avoid the risk of deadlock. | |
152 | * | |
153 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
154 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
155 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
156 | * and either handles the message itself or adds it to the socket's backlog | |
157 | * queue; in the latter case the queued message is processed once the process | |
158 | * owning the socket lock releases it. | |
159 | * | |
160 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
161 | * the problem of a blocked socket operation preventing any other operations | |
162 | * from occurring. However, applications must be careful if they have | |
163 | * multiple threads trying to send (or receive) on the same socket, as these | |
164 | * operations might interfere with each other. For example, doing a connect | |
165 | * and a receive at the same time might allow the receive to consume the | |
166 | * ACK message meant for the connect. While additional work could be done | |
167 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
168 | * | |
169 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
170 | * that another operation that must be performed in a non-blocking manner is | |
171 | * not delayed for very long because the lock has already been taken. | |
172 | * | |
173 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
174 | * constant over its lifetime; such fields can be examined without taking | |
175 | * the socket lock and/or port lock, and do not need to be re-read even | |
176 | * after resuming processing after waiting. These fields include: | |
177 | * - socket type | |
178 | * - pointer to socket sk structure (aka tipc_sock structure) | |
179 | * - pointer to port structure | |
180 | * - port reference | |
181 | */ | |
182 | ||
c5898636 JPM |
183 | static u32 tsk_own_node(struct tipc_sock *tsk) |
184 | { | |
185 | return msg_prevnode(&tsk->phdr); | |
186 | } | |
187 | ||
301bae56 | 188 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 189 | { |
301bae56 | 190 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
191 | } |
192 | ||
301bae56 | 193 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 194 | { |
301bae56 | 195 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
196 | } |
197 | ||
301bae56 | 198 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 199 | { |
301bae56 | 200 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
201 | } |
202 | ||
301bae56 | 203 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 204 | { |
301bae56 | 205 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
206 | } |
207 | ||
301bae56 | 208 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 209 | { |
301bae56 | 210 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
211 | } |
212 | ||
301bae56 | 213 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 214 | { |
301bae56 | 215 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
216 | } |
217 | ||
301bae56 | 218 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 219 | { |
301bae56 | 220 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
221 | } |
222 | ||
301bae56 | 223 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
224 | { |
225 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
226 | return -EINVAL; | |
301bae56 | 227 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
228 | return 0; |
229 | } | |
8826cde6 | 230 | |
301bae56 JPM |
231 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
232 | { | |
233 | return container_of(sk, struct tipc_sock, sk); | |
234 | } | |
235 | ||
236 | static int tsk_conn_cong(struct tipc_sock *tsk) | |
237 | { | |
238 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; | |
239 | } | |
240 | ||
0c3141e9 | 241 | /** |
2e84c60b | 242 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
243 | * |
244 | * Caller must hold socket lock | |
b97bf3fd | 245 | */ |
2e84c60b | 246 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 247 | { |
5f6d9123 | 248 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
249 | } |
250 | ||
bcd3ffd4 JPM |
251 | /* tipc_sk_respond() : send response message back to sender |
252 | */ | |
253 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
254 | { | |
255 | u32 selector; | |
256 | u32 dnode; | |
257 | u32 onode = tipc_own_addr(sock_net(sk)); | |
258 | ||
259 | if (!tipc_msg_reverse(onode, &skb, err)) | |
260 | return; | |
261 | ||
262 | dnode = msg_destnode(buf_msg(skb)); | |
263 | selector = msg_origport(buf_msg(skb)); | |
264 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
265 | } | |
266 | ||
b97bf3fd | 267 | /** |
2e84c60b | 268 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
269 | * |
270 | * Caller must hold socket lock | |
b97bf3fd | 271 | */ |
2e84c60b | 272 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 273 | { |
a6ca1094 | 274 | struct sk_buff *skb; |
0c3141e9 | 275 | |
bcd3ffd4 JPM |
276 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
277 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
278 | } |
279 | ||
2e84c60b | 280 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
281 | * |
282 | * Handles cases where the node's network address has changed from | |
283 | * the default of <0.0.0> to its configured setting. | |
284 | */ | |
2e84c60b | 285 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 286 | { |
34747539 | 287 | struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id); |
301bae56 | 288 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
289 | u32 orig_node; |
290 | u32 peer_node; | |
291 | ||
301bae56 | 292 | if (unlikely(!tsk->connected)) |
0fc87aae JPM |
293 | return false; |
294 | ||
295 | if (unlikely(msg_origport(msg) != peer_port)) | |
296 | return false; | |
297 | ||
298 | orig_node = msg_orignode(msg); | |
301bae56 | 299 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
300 | |
301 | if (likely(orig_node == peer_node)) | |
302 | return true; | |
303 | ||
34747539 | 304 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
305 | return true; |
306 | ||
34747539 | 307 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
308 | return true; |
309 | ||
310 | return false; | |
311 | } | |
312 | ||
b97bf3fd | 313 | /** |
c5fa7b3c | 314 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 315 | * @net: network namespace (must be default network) |
b97bf3fd PL |
316 | * @sock: pre-allocated socket structure |
317 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 318 | * @kern: caused by kernel or by userspace? |
c4307285 | 319 | * |
0c3141e9 AS |
320 | * This routine creates additional data structures used by the TIPC socket, |
321 | * initializes them, and links them together. | |
b97bf3fd PL |
322 | * |
323 | * Returns 0 on success, errno otherwise | |
324 | */ | |
58ed9442 JPM |
325 | static int tipc_sk_create(struct net *net, struct socket *sock, |
326 | int protocol, int kern) | |
b97bf3fd | 327 | { |
c5898636 | 328 | struct tipc_net *tn; |
0c3141e9 AS |
329 | const struct proto_ops *ops; |
330 | socket_state state; | |
b97bf3fd | 331 | struct sock *sk; |
58ed9442 | 332 | struct tipc_sock *tsk; |
5b8fa7ce | 333 | struct tipc_msg *msg; |
0c3141e9 AS |
334 | |
335 | /* Validate arguments */ | |
b97bf3fd PL |
336 | if (unlikely(protocol != 0)) |
337 | return -EPROTONOSUPPORT; | |
338 | ||
b97bf3fd PL |
339 | switch (sock->type) { |
340 | case SOCK_STREAM: | |
0c3141e9 AS |
341 | ops = &stream_ops; |
342 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
343 | break; |
344 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
345 | ops = &packet_ops; |
346 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
347 | break; |
348 | case SOCK_DGRAM: | |
b97bf3fd | 349 | case SOCK_RDM: |
0c3141e9 AS |
350 | ops = &msg_ops; |
351 | state = SS_READY; | |
b97bf3fd | 352 | break; |
49978651 | 353 | default: |
49978651 | 354 | return -EPROTOTYPE; |
b97bf3fd PL |
355 | } |
356 | ||
0c3141e9 | 357 | /* Allocate socket's protocol area */ |
11aa9c28 | 358 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 359 | if (sk == NULL) |
b97bf3fd | 360 | return -ENOMEM; |
b97bf3fd | 361 | |
58ed9442 | 362 | tsk = tipc_sk(sk); |
301bae56 | 363 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
364 | INIT_LIST_HEAD(&tsk->publications); |
365 | msg = &tsk->phdr; | |
c5898636 JPM |
366 | tn = net_generic(sock_net(sk), tipc_net_id); |
367 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 368 | NAMED_H_SIZE, 0); |
b97bf3fd | 369 | |
0c3141e9 | 370 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
371 | sock->ops = ops; |
372 | sock->state = state; | |
0c3141e9 | 373 | sock_init_data(sock, sk); |
07f6c4bc YX |
374 | if (tipc_sk_insert(tsk)) { |
375 | pr_warn("Socket create failed; port numbrer exhausted\n"); | |
376 | return -EINVAL; | |
377 | } | |
378 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 379 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
4f4482dc | 380 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 381 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
382 | sk->sk_data_ready = tipc_data_ready; |
383 | sk->sk_write_space = tipc_write_space; | |
4f4482dc | 384 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 385 | tsk->sent_unacked = 0; |
4f4482dc | 386 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 387 | |
0c3141e9 | 388 | if (sock->state == SS_READY) { |
301bae56 | 389 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 390 | if (sock->type == SOCK_DGRAM) |
301bae56 | 391 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 392 | } |
b97bf3fd PL |
393 | return 0; |
394 | } | |
395 | ||
07f6c4bc YX |
396 | static void tipc_sk_callback(struct rcu_head *head) |
397 | { | |
398 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
399 | ||
400 | sock_put(&tsk->sk); | |
401 | } | |
402 | ||
b97bf3fd | 403 | /** |
247f0f3c | 404 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
405 | * @sock: socket to destroy |
406 | * | |
407 | * This routine cleans up any messages that are still queued on the socket. | |
408 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
409 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
410 | * and any others are discarded. (If the first message on a STREAM socket | |
411 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 412 | * |
b97bf3fd PL |
413 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
414 | * are returned or discarded according to the "destination droppable" setting | |
415 | * specified for the message by the sender. | |
416 | * | |
417 | * Returns 0 on success, errno otherwise | |
418 | */ | |
247f0f3c | 419 | static int tipc_release(struct socket *sock) |
b97bf3fd | 420 | { |
b97bf3fd | 421 | struct sock *sk = sock->sk; |
357c4774 | 422 | struct net *net; |
58ed9442 | 423 | struct tipc_sock *tsk; |
a6ca1094 | 424 | struct sk_buff *skb; |
1ea23a21 | 425 | u32 dnode; |
b97bf3fd | 426 | |
0c3141e9 AS |
427 | /* |
428 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
429 | * releases a pre-allocated child socket that was never used) | |
430 | */ | |
0c3141e9 | 431 | if (sk == NULL) |
b97bf3fd | 432 | return 0; |
c4307285 | 433 | |
357c4774 | 434 | net = sock_net(sk); |
58ed9442 | 435 | tsk = tipc_sk(sk); |
0c3141e9 AS |
436 | lock_sock(sk); |
437 | ||
438 | /* | |
439 | * Reject all unreceived messages, except on an active connection | |
440 | * (which disconnects locally & sends a 'FIN+' to peer) | |
441 | */ | |
301bae56 | 442 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 443 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
444 | skb = __skb_dequeue(&sk->sk_receive_queue); |
445 | if (skb == NULL) | |
b97bf3fd | 446 | break; |
a6ca1094 YX |
447 | if (TIPC_SKB_CB(skb)->handle != NULL) |
448 | kfree_skb(skb); | |
0c3141e9 AS |
449 | else { |
450 | if ((sock->state == SS_CONNECTING) || | |
451 | (sock->state == SS_CONNECTED)) { | |
452 | sock->state = SS_DISCONNECTING; | |
301bae56 | 453 | tsk->connected = 0; |
f2f9800d | 454 | tipc_node_remove_conn(net, dnode, tsk->portid); |
0c3141e9 | 455 | } |
bcd3ffd4 | 456 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); |
0c3141e9 | 457 | } |
b97bf3fd PL |
458 | } |
459 | ||
301bae56 | 460 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 461 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 462 | tipc_sk_remove(tsk); |
301bae56 | 463 | if (tsk->connected) { |
c5898636 | 464 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 465 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
c5898636 | 466 | tsk_own_node(tsk), tsk_peer_port(tsk), |
07f6c4bc | 467 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 468 | if (skb) |
af9b028e | 469 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); |
f2f9800d | 470 | tipc_node_remove_conn(net, dnode, tsk->portid); |
5b8fa7ce | 471 | } |
b97bf3fd | 472 | |
0c3141e9 | 473 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 474 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 475 | |
0c3141e9 | 476 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
477 | sock->state = SS_DISCONNECTING; |
478 | release_sock(sk); | |
07f6c4bc YX |
479 | |
480 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 481 | sock->sk = NULL; |
b97bf3fd | 482 | |
065d7e39 | 483 | return 0; |
b97bf3fd PL |
484 | } |
485 | ||
486 | /** | |
247f0f3c | 487 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
488 | * @sock: socket structure |
489 | * @uaddr: socket address describing name(s) and desired operation | |
490 | * @uaddr_len: size of socket address data structure | |
c4307285 | 491 | * |
b97bf3fd PL |
492 | * Name and name sequence binding is indicated using a positive scope value; |
493 | * a negative scope value unbinds the specified name. Specifying no name | |
494 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 495 | * |
b97bf3fd | 496 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
497 | * |
498 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
499 | * access any non-constant socket information. | |
b97bf3fd | 500 | */ |
247f0f3c YX |
501 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
502 | int uaddr_len) | |
b97bf3fd | 503 | { |
84602761 | 504 | struct sock *sk = sock->sk; |
b97bf3fd | 505 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 506 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 507 | int res = -EINVAL; |
b97bf3fd | 508 | |
84602761 YX |
509 | lock_sock(sk); |
510 | if (unlikely(!uaddr_len)) { | |
301bae56 | 511 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
512 | goto exit; |
513 | } | |
c4307285 | 514 | |
84602761 YX |
515 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
516 | res = -EINVAL; | |
517 | goto exit; | |
518 | } | |
519 | if (addr->family != AF_TIPC) { | |
520 | res = -EAFNOSUPPORT; | |
521 | goto exit; | |
522 | } | |
b97bf3fd | 523 | |
b97bf3fd PL |
524 | if (addr->addrtype == TIPC_ADDR_NAME) |
525 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
526 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
527 | res = -EAFNOSUPPORT; | |
528 | goto exit; | |
529 | } | |
c4307285 | 530 | |
13a2e898 | 531 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 532 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
533 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
534 | res = -EACCES; | |
535 | goto exit; | |
536 | } | |
c422f1bd | 537 | |
84602761 | 538 | res = (addr->scope > 0) ? |
301bae56 JPM |
539 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
540 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
541 | exit: |
542 | release_sock(sk); | |
543 | return res; | |
b97bf3fd PL |
544 | } |
545 | ||
c4307285 | 546 | /** |
247f0f3c | 547 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
548 | * @sock: socket structure |
549 | * @uaddr: area for returned socket address | |
550 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 551 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 552 | * |
b97bf3fd | 553 | * Returns 0 on success, errno otherwise |
0c3141e9 | 554 | * |
2da59918 AS |
555 | * NOTE: This routine doesn't need to take the socket lock since it only |
556 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 557 | * a completely predictable manner). |
b97bf3fd | 558 | */ |
247f0f3c YX |
559 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
560 | int *uaddr_len, int peer) | |
b97bf3fd | 561 | { |
b97bf3fd | 562 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 563 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
34747539 | 564 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 565 | |
88f8a5e3 | 566 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 567 | if (peer) { |
2da59918 AS |
568 | if ((sock->state != SS_CONNECTED) && |
569 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
570 | return -ENOTCONN; | |
301bae56 JPM |
571 | addr->addr.id.ref = tsk_peer_port(tsk); |
572 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 573 | } else { |
07f6c4bc | 574 | addr->addr.id.ref = tsk->portid; |
34747539 | 575 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 576 | } |
b97bf3fd PL |
577 | |
578 | *uaddr_len = sizeof(*addr); | |
579 | addr->addrtype = TIPC_ADDR_ID; | |
580 | addr->family = AF_TIPC; | |
581 | addr->scope = 0; | |
b97bf3fd PL |
582 | addr->addr.name.domain = 0; |
583 | ||
0c3141e9 | 584 | return 0; |
b97bf3fd PL |
585 | } |
586 | ||
587 | /** | |
247f0f3c | 588 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
589 | * @file: file structure associated with the socket |
590 | * @sock: socket for which to calculate the poll bits | |
591 | * @wait: ??? | |
592 | * | |
9b674e82 AS |
593 | * Returns pollmask value |
594 | * | |
595 | * COMMENTARY: | |
596 | * It appears that the usual socket locking mechanisms are not useful here | |
597 | * since the pollmask info is potentially out-of-date the moment this routine | |
598 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
599 | * to handle any preventable race conditions, so TIPC will do the same ... | |
600 | * | |
601 | * TIPC sets the returned events as follows: | |
f662c070 AS |
602 | * |
603 | * socket state flags set | |
604 | * ------------ --------- | |
605 | * unconnected no read flags | |
c4fc298a | 606 | * POLLOUT if port is not congested |
f662c070 AS |
607 | * |
608 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
609 | * no write flags | |
610 | * | |
611 | * connected POLLIN/POLLRDNORM if data in rx queue | |
612 | * POLLOUT if port is not congested | |
613 | * | |
614 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
615 | * no write flags | |
616 | * | |
617 | * listening POLLIN if SYN in rx queue | |
618 | * no write flags | |
619 | * | |
620 | * ready POLLIN/POLLRDNORM if data in rx queue | |
621 | * [connectionless] POLLOUT (since port cannot be congested) | |
622 | * | |
623 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
624 | * imply that the operation will succeed, merely that it should be performed | |
625 | * and will not block. | |
b97bf3fd | 626 | */ |
247f0f3c YX |
627 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
628 | poll_table *wait) | |
b97bf3fd | 629 | { |
9b674e82 | 630 | struct sock *sk = sock->sk; |
58ed9442 | 631 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 632 | u32 mask = 0; |
9b674e82 | 633 | |
f288bef4 | 634 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 635 | |
f662c070 | 636 | switch ((int)sock->state) { |
c4fc298a | 637 | case SS_UNCONNECTED: |
60120526 | 638 | if (!tsk->link_cong) |
c4fc298a EH |
639 | mask |= POLLOUT; |
640 | break; | |
f662c070 AS |
641 | case SS_READY: |
642 | case SS_CONNECTED: | |
301bae56 | 643 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
644 | mask |= POLLOUT; |
645 | /* fall thru' */ | |
646 | case SS_CONNECTING: | |
647 | case SS_LISTENING: | |
648 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
649 | mask |= (POLLIN | POLLRDNORM); | |
650 | break; | |
651 | case SS_DISCONNECTING: | |
652 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
653 | break; | |
654 | } | |
9b674e82 AS |
655 | |
656 | return mask; | |
b97bf3fd PL |
657 | } |
658 | ||
0abd8ff2 JPM |
659 | /** |
660 | * tipc_sendmcast - send multicast message | |
661 | * @sock: socket structure | |
662 | * @seq: destination address | |
562640f3 | 663 | * @msg: message to send |
0abd8ff2 JPM |
664 | * @dsz: total length of message data |
665 | * @timeo: timeout to wait for wakeup | |
666 | * | |
667 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
668 | * Returns the number of bytes sent on success, or errno | |
669 | */ | |
670 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 671 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
672 | { |
673 | struct sock *sk = sock->sk; | |
c5898636 | 674 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 675 | struct net *net = sock_net(sk); |
c5898636 | 676 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 677 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
f25dcc76 | 678 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
679 | uint mtu; |
680 | int rc; | |
681 | ||
682 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
683 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
684 | msg_set_destport(mhdr, 0); | |
685 | msg_set_destnode(mhdr, 0); | |
686 | msg_set_nametype(mhdr, seq->type); | |
687 | msg_set_namelower(mhdr, seq->lower); | |
688 | msg_set_nameupper(mhdr, seq->upper); | |
689 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
690 | ||
691 | new_mtu: | |
959e1781 | 692 | mtu = tipc_bcast_get_mtu(net); |
94153e36 | 693 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, pktchain); |
0abd8ff2 JPM |
694 | if (unlikely(rc < 0)) |
695 | return rc; | |
696 | ||
697 | do { | |
6beb19a6 | 698 | rc = tipc_bcast_xmit(net, pktchain); |
22d85c79 JPM |
699 | if (likely(!rc)) |
700 | return dsz; | |
701 | ||
702 | if (rc == -ELINKCONG) { | |
703 | tsk->link_cong = 1; | |
704 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
705 | if (!rc) | |
706 | continue; | |
0abd8ff2 | 707 | } |
22d85c79 | 708 | __skb_queue_purge(pktchain); |
f25dcc76 AV |
709 | if (rc == -EMSGSIZE) { |
710 | msg->msg_iter = save; | |
0abd8ff2 | 711 | goto new_mtu; |
f25dcc76 | 712 | } |
22d85c79 JPM |
713 | break; |
714 | } while (1); | |
0abd8ff2 JPM |
715 | return rc; |
716 | } | |
717 | ||
cb1b7280 JPM |
718 | /** |
719 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
720 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
721 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
722 | * | |
723 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 724 | */ |
cb1b7280 JPM |
725 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
726 | struct sk_buff_head *inputq) | |
078bec82 | 727 | { |
cb1b7280 | 728 | struct tipc_msg *msg; |
3c724acd | 729 | struct tipc_plist dports; |
3c724acd | 730 | u32 portid; |
078bec82 | 731 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
732 | struct sk_buff_head tmpq; |
733 | uint hsz; | |
734 | struct sk_buff *skb, *_skb; | |
3c724acd | 735 | |
cb1b7280 | 736 | __skb_queue_head_init(&tmpq); |
3c724acd | 737 | tipc_plist_init(&dports); |
078bec82 | 738 | |
cb1b7280 JPM |
739 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
740 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
741 | msg = buf_msg(skb); | |
742 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
743 | ||
744 | if (in_own_node(net, msg_orignode(msg))) | |
745 | scope = TIPC_NODE_SCOPE; | |
746 | ||
747 | /* Create destination port list and message clones: */ | |
748 | tipc_nametbl_mc_translate(net, | |
749 | msg_nametype(msg), msg_namelower(msg), | |
750 | msg_nameupper(msg), scope, &dports); | |
751 | portid = tipc_plist_pop(&dports); | |
752 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
753 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
754 | if (_skb) { | |
755 | msg_set_destport(buf_msg(_skb), portid); | |
756 | __skb_queue_tail(&tmpq, _skb); | |
757 | continue; | |
758 | } | |
759 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 760 | } |
cb1b7280 JPM |
761 | /* Append to inputq if not already done by other thread */ |
762 | spin_lock_bh(&inputq->lock); | |
763 | if (skb_peek(arrvq) == skb) { | |
764 | skb_queue_splice_tail_init(&tmpq, inputq); | |
765 | kfree_skb(__skb_dequeue(arrvq)); | |
766 | } | |
767 | spin_unlock_bh(&inputq->lock); | |
768 | __skb_queue_purge(&tmpq); | |
769 | kfree_skb(skb); | |
078bec82 | 770 | } |
cb1b7280 | 771 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
772 | } |
773 | ||
ac0074ee JPM |
774 | /** |
775 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
776 | * @tsk: receiving socket | |
bcd3ffd4 | 777 | * @skb: pointer to message buffer. |
ac0074ee | 778 | */ |
bcd3ffd4 | 779 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb) |
ac0074ee | 780 | { |
bcd3ffd4 JPM |
781 | struct sock *sk = &tsk->sk; |
782 | struct tipc_msg *hdr = buf_msg(skb); | |
783 | int mtyp = msg_type(hdr); | |
60120526 | 784 | int conn_cong; |
bcd3ffd4 | 785 | |
ac0074ee | 786 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 787 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
788 | goto exit; |
789 | ||
301bae56 | 790 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee | 791 | |
bcd3ffd4 JPM |
792 | if (mtyp == CONN_PROBE) { |
793 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
794 | tipc_sk_respond(sk, skb, TIPC_OK); | |
795 | return; | |
796 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 797 | conn_cong = tsk_conn_cong(tsk); |
bcd3ffd4 | 798 | tsk->sent_unacked -= msg_msgcnt(hdr); |
60120526 | 799 | if (conn_cong) |
bcd3ffd4 JPM |
800 | sk->sk_write_space(sk); |
801 | } else if (mtyp != CONN_PROBE_REPLY) { | |
802 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 803 | } |
ac0074ee | 804 | exit: |
bcd3ffd4 | 805 | kfree_skb(skb); |
ac0074ee JPM |
806 | } |
807 | ||
3f40504f YX |
808 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
809 | { | |
810 | struct sock *sk = sock->sk; | |
58ed9442 | 811 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
812 | DEFINE_WAIT(wait); |
813 | int done; | |
814 | ||
815 | do { | |
816 | int err = sock_error(sk); | |
817 | if (err) | |
818 | return err; | |
819 | if (sock->state == SS_DISCONNECTING) | |
820 | return -EPIPE; | |
821 | if (!*timeo_p) | |
822 | return -EAGAIN; | |
823 | if (signal_pending(current)) | |
824 | return sock_intr_errno(*timeo_p); | |
825 | ||
826 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 827 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
828 | finish_wait(sk_sleep(sk), &wait); |
829 | } while (!done); | |
830 | return 0; | |
831 | } | |
832 | ||
b97bf3fd | 833 | /** |
247f0f3c | 834 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
835 | * @sock: socket structure |
836 | * @m: message to send | |
e2dafe87 | 837 | * @dsz: amount of user data to be sent |
c4307285 | 838 | * |
b97bf3fd | 839 | * Message must have an destination specified explicitly. |
c4307285 | 840 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
841 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
842 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 843 | * |
b97bf3fd PL |
844 | * Returns the number of bytes sent on success, or errno otherwise |
845 | */ | |
1b784140 | 846 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 847 | struct msghdr *m, size_t dsz) |
39a0295f YX |
848 | { |
849 | struct sock *sk = sock->sk; | |
850 | int ret; | |
851 | ||
852 | lock_sock(sk); | |
853 | ret = __tipc_sendmsg(sock, m, dsz); | |
854 | release_sock(sk); | |
855 | ||
856 | return ret; | |
857 | } | |
858 | ||
859 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 860 | { |
e2dafe87 | 861 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 862 | struct sock *sk = sock->sk; |
58ed9442 | 863 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 864 | struct net *net = sock_net(sk); |
301bae56 | 865 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 866 | u32 dnode, dport; |
94153e36 | 867 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
a6ca1094 | 868 | struct sk_buff *skb; |
f2f8036e | 869 | struct tipc_name_seq *seq; |
f25dcc76 | 870 | struct iov_iter save; |
e2dafe87 | 871 | u32 mtu; |
3f40504f | 872 | long timeo; |
88b17b6a | 873 | int rc; |
b97bf3fd | 874 | |
e2dafe87 | 875 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 876 | return -EMSGSIZE; |
f2f8036e EH |
877 | if (unlikely(!dest)) { |
878 | if (tsk->connected && sock->state == SS_READY) | |
879 | dest = &tsk->remote; | |
880 | else | |
881 | return -EDESTADDRREQ; | |
882 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || | |
883 | dest->family != AF_TIPC) { | |
884 | return -EINVAL; | |
885 | } | |
e2dafe87 | 886 | if (unlikely(sock->state != SS_READY)) { |
39a0295f YX |
887 | if (sock->state == SS_LISTENING) |
888 | return -EPIPE; | |
889 | if (sock->state != SS_UNCONNECTED) | |
890 | return -EISCONN; | |
891 | if (tsk->published) | |
892 | return -EOPNOTSUPP; | |
3388007b | 893 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
894 | tsk->conn_type = dest->addr.name.name.type; |
895 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 896 | } |
b97bf3fd | 897 | } |
f2f8036e | 898 | seq = &dest->addr.nameseq; |
3f40504f | 899 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
900 | |
901 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 902 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
903 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
904 | u32 type = dest->addr.name.name.type; | |
905 | u32 inst = dest->addr.name.name.instance; | |
906 | u32 domain = dest->addr.name.domain; | |
907 | ||
908 | dnode = domain; | |
909 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
910 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
911 | msg_set_nametype(mhdr, type); | |
912 | msg_set_nameinst(mhdr, inst); | |
913 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 914 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
915 | msg_set_destnode(mhdr, dnode); |
916 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
917 | if (unlikely(!dport && !dnode)) |
918 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
919 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
920 | dnode = dest->addr.id.node; | |
921 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
922 | msg_set_lookup_scope(mhdr, 0); | |
923 | msg_set_destnode(mhdr, dnode); | |
924 | msg_set_destport(mhdr, dest->addr.id.ref); | |
925 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
926 | } | |
927 | ||
f25dcc76 | 928 | save = m->msg_iter; |
e2dafe87 | 929 | new_mtu: |
f2f9800d | 930 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
94153e36 | 931 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, pktchain); |
e2dafe87 | 932 | if (rc < 0) |
39a0295f | 933 | return rc; |
e2dafe87 JPM |
934 | |
935 | do { | |
94153e36 | 936 | skb = skb_peek(pktchain); |
a6ca1094 | 937 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
af9b028e | 938 | rc = tipc_node_xmit(net, pktchain, dnode, tsk->portid); |
22d85c79 | 939 | if (likely(!rc)) { |
e2dafe87 | 940 | if (sock->state != SS_READY) |
0c3141e9 | 941 | sock->state = SS_CONNECTING; |
22d85c79 | 942 | return dsz; |
c4307285 | 943 | } |
22d85c79 JPM |
944 | if (rc == -ELINKCONG) { |
945 | tsk->link_cong = 1; | |
946 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
947 | if (!rc) | |
948 | continue; | |
949 | } | |
950 | __skb_queue_purge(pktchain); | |
f25dcc76 AV |
951 | if (rc == -EMSGSIZE) { |
952 | m->msg_iter = save; | |
e2dafe87 | 953 | goto new_mtu; |
f25dcc76 | 954 | } |
22d85c79 JPM |
955 | break; |
956 | } while (1); | |
e2dafe87 JPM |
957 | |
958 | return rc; | |
b97bf3fd PL |
959 | } |
960 | ||
391a6dd1 YX |
961 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
962 | { | |
963 | struct sock *sk = sock->sk; | |
58ed9442 | 964 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
965 | DEFINE_WAIT(wait); |
966 | int done; | |
967 | ||
968 | do { | |
969 | int err = sock_error(sk); | |
970 | if (err) | |
971 | return err; | |
972 | if (sock->state == SS_DISCONNECTING) | |
973 | return -EPIPE; | |
974 | else if (sock->state != SS_CONNECTED) | |
975 | return -ENOTCONN; | |
976 | if (!*timeo_p) | |
977 | return -EAGAIN; | |
978 | if (signal_pending(current)) | |
979 | return sock_intr_errno(*timeo_p); | |
980 | ||
981 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
982 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 983 | (!tsk->link_cong && |
301bae56 JPM |
984 | !tsk_conn_cong(tsk)) || |
985 | !tsk->connected); | |
391a6dd1 YX |
986 | finish_wait(sk_sleep(sk), &wait); |
987 | } while (!done); | |
988 | return 0; | |
989 | } | |
990 | ||
c4307285 | 991 | /** |
4ccfe5e0 | 992 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 993 | * @sock: socket structure |
4ccfe5e0 JPM |
994 | * @m: data to send |
995 | * @dsz: total length of data to be transmitted | |
c4307285 | 996 | * |
4ccfe5e0 | 997 | * Used for SOCK_STREAM data. |
c4307285 | 998 | * |
4ccfe5e0 JPM |
999 | * Returns the number of bytes sent on success (or partial success), |
1000 | * or errno if no data sent | |
b97bf3fd | 1001 | */ |
1b784140 | 1002 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1003 | { |
1004 | struct sock *sk = sock->sk; | |
1005 | int ret; | |
1006 | ||
1007 | lock_sock(sk); | |
1008 | ret = __tipc_send_stream(sock, m, dsz); | |
1009 | release_sock(sk); | |
1010 | ||
1011 | return ret; | |
1012 | } | |
1013 | ||
1014 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1015 | { |
0c3141e9 | 1016 | struct sock *sk = sock->sk; |
f2f9800d | 1017 | struct net *net = sock_net(sk); |
58ed9442 | 1018 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1019 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 1020 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
342dfc30 | 1021 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1022 | u32 portid = tsk->portid; |
4ccfe5e0 | 1023 | int rc = -EINVAL; |
391a6dd1 | 1024 | long timeo; |
4ccfe5e0 JPM |
1025 | u32 dnode; |
1026 | uint mtu, send, sent = 0; | |
f25dcc76 | 1027 | struct iov_iter save; |
b97bf3fd PL |
1028 | |
1029 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1030 | if (unlikely(dest)) { |
39a0295f | 1031 | rc = __tipc_sendmsg(sock, m, dsz); |
4ccfe5e0 | 1032 | if (dsz && (dsz == rc)) |
60120526 | 1033 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
1034 | return rc; |
1035 | } | |
1036 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1037 | return -EMSGSIZE; |
1038 | ||
391a6dd1 YX |
1039 | if (unlikely(sock->state != SS_CONNECTED)) { |
1040 | if (sock->state == SS_DISCONNECTING) | |
39a0295f | 1041 | return -EPIPE; |
391a6dd1 | 1042 | else |
39a0295f | 1043 | return -ENOTCONN; |
391a6dd1 | 1044 | } |
1d835874 | 1045 | |
391a6dd1 | 1046 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
301bae56 | 1047 | dnode = tsk_peer_node(tsk); |
4ccfe5e0 JPM |
1048 | |
1049 | next: | |
f25dcc76 | 1050 | save = m->msg_iter; |
301bae56 | 1051 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1052 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
94153e36 | 1053 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, pktchain); |
4ccfe5e0 | 1054 | if (unlikely(rc < 0)) |
39a0295f | 1055 | return rc; |
c4307285 | 1056 | do { |
301bae56 | 1057 | if (likely(!tsk_conn_cong(tsk))) { |
af9b028e | 1058 | rc = tipc_node_xmit(net, pktchain, dnode, portid); |
4ccfe5e0 | 1059 | if (likely(!rc)) { |
60120526 | 1060 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1061 | sent += send; |
1062 | if (sent == dsz) | |
22d85c79 | 1063 | return dsz; |
4ccfe5e0 JPM |
1064 | goto next; |
1065 | } | |
1066 | if (rc == -EMSGSIZE) { | |
22d85c79 | 1067 | __skb_queue_purge(pktchain); |
f2f9800d YX |
1068 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1069 | portid); | |
f25dcc76 | 1070 | m->msg_iter = save; |
4ccfe5e0 JPM |
1071 | goto next; |
1072 | } | |
1073 | if (rc != -ELINKCONG) | |
1074 | break; | |
22d85c79 | 1075 | |
50100a5e | 1076 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1077 | } |
1078 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
1079 | } while (!rc); | |
39a0295f | 1080 | |
22d85c79 | 1081 | __skb_queue_purge(pktchain); |
4ccfe5e0 | 1082 | return sent ? sent : rc; |
b97bf3fd PL |
1083 | } |
1084 | ||
c4307285 | 1085 | /** |
4ccfe5e0 | 1086 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1087 | * @sock: socket structure |
4ccfe5e0 JPM |
1088 | * @m: message to send |
1089 | * @dsz: length of data to be transmitted | |
c4307285 | 1090 | * |
4ccfe5e0 | 1091 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1092 | * |
4ccfe5e0 | 1093 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1094 | */ |
1b784140 | 1095 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1096 | { |
4ccfe5e0 JPM |
1097 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1098 | return -EMSGSIZE; | |
b97bf3fd | 1099 | |
1b784140 | 1100 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1101 | } |
1102 | ||
dadebc00 | 1103 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1104 | */ |
301bae56 | 1105 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1106 | u32 peer_node) |
b97bf3fd | 1107 | { |
3721e9c7 YX |
1108 | struct sock *sk = &tsk->sk; |
1109 | struct net *net = sock_net(sk); | |
301bae56 | 1110 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1111 | |
dadebc00 JPM |
1112 | msg_set_destnode(msg, peer_node); |
1113 | msg_set_destport(msg, peer_port); | |
1114 | msg_set_type(msg, TIPC_CONN_MSG); | |
1115 | msg_set_lookup_scope(msg, 0); | |
1116 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1117 | |
2f55c437 | 1118 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 JPM |
1119 | tsk->probing_state = TIPC_CONN_OK; |
1120 | tsk->connected = 1; | |
3721e9c7 | 1121 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
f2f9800d YX |
1122 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1123 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
b97bf3fd PL |
1124 | } |
1125 | ||
1126 | /** | |
1127 | * set_orig_addr - capture sender's address for received message | |
1128 | * @m: descriptor for message info | |
1129 | * @msg: received message header | |
c4307285 | 1130 | * |
b97bf3fd PL |
1131 | * Note: Address is not captured if not requested by receiver. |
1132 | */ | |
05790c64 | 1133 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1134 | { |
342dfc30 | 1135 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1136 | |
c4307285 | 1137 | if (addr) { |
b97bf3fd PL |
1138 | addr->family = AF_TIPC; |
1139 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1140 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1141 | addr->addr.id.ref = msg_origport(msg); |
1142 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1143 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1144 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1145 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1146 | } | |
1147 | } | |
1148 | ||
1149 | /** | |
301bae56 | 1150 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1151 | * @m: descriptor for message info |
1152 | * @msg: received message header | |
301bae56 | 1153 | * @tsk: TIPC port associated with message |
c4307285 | 1154 | * |
b97bf3fd | 1155 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1156 | * |
b97bf3fd PL |
1157 | * Returns 0 if successful, otherwise errno |
1158 | */ | |
301bae56 JPM |
1159 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1160 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1161 | { |
1162 | u32 anc_data[3]; | |
1163 | u32 err; | |
1164 | u32 dest_type; | |
3546c750 | 1165 | int has_name; |
b97bf3fd PL |
1166 | int res; |
1167 | ||
1168 | if (likely(m->msg_controllen == 0)) | |
1169 | return 0; | |
1170 | ||
1171 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1172 | err = msg ? msg_errcode(msg) : 0; |
1173 | if (unlikely(err)) { | |
1174 | anc_data[0] = err; | |
1175 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1176 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1177 | if (res) | |
b97bf3fd | 1178 | return res; |
2db9983a AS |
1179 | if (anc_data[1]) { |
1180 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1181 | msg_data(msg)); | |
1182 | if (res) | |
1183 | return res; | |
1184 | } | |
b97bf3fd PL |
1185 | } |
1186 | ||
1187 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1188 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1189 | switch (dest_type) { | |
1190 | case TIPC_NAMED_MSG: | |
3546c750 | 1191 | has_name = 1; |
b97bf3fd PL |
1192 | anc_data[0] = msg_nametype(msg); |
1193 | anc_data[1] = msg_namelower(msg); | |
1194 | anc_data[2] = msg_namelower(msg); | |
1195 | break; | |
1196 | case TIPC_MCAST_MSG: | |
3546c750 | 1197 | has_name = 1; |
b97bf3fd PL |
1198 | anc_data[0] = msg_nametype(msg); |
1199 | anc_data[1] = msg_namelower(msg); | |
1200 | anc_data[2] = msg_nameupper(msg); | |
1201 | break; | |
1202 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1203 | has_name = (tsk->conn_type != 0); |
1204 | anc_data[0] = tsk->conn_type; | |
1205 | anc_data[1] = tsk->conn_instance; | |
1206 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1207 | break; |
1208 | default: | |
3546c750 | 1209 | has_name = 0; |
b97bf3fd | 1210 | } |
2db9983a AS |
1211 | if (has_name) { |
1212 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1213 | if (res) | |
1214 | return res; | |
1215 | } | |
b97bf3fd PL |
1216 | |
1217 | return 0; | |
1218 | } | |
1219 | ||
301bae56 | 1220 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
739f5e4e | 1221 | { |
f2f9800d | 1222 | struct net *net = sock_net(&tsk->sk); |
a6ca1094 | 1223 | struct sk_buff *skb = NULL; |
739f5e4e | 1224 | struct tipc_msg *msg; |
301bae56 JPM |
1225 | u32 peer_port = tsk_peer_port(tsk); |
1226 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1227 | |
301bae56 | 1228 | if (!tsk->connected) |
739f5e4e | 1229 | return; |
c5898636 JPM |
1230 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1231 | dnode, tsk_own_node(tsk), peer_port, | |
1232 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1233 | if (!skb) |
739f5e4e | 1234 | return; |
a6ca1094 | 1235 | msg = buf_msg(skb); |
739f5e4e | 1236 | msg_set_msgcnt(msg, ack); |
af9b028e | 1237 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1238 | } |
1239 | ||
85d3fc94 | 1240 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1241 | { |
1242 | struct sock *sk = sock->sk; | |
1243 | DEFINE_WAIT(wait); | |
85d3fc94 | 1244 | long timeo = *timeop; |
9bbb4ecc YX |
1245 | int err; |
1246 | ||
1247 | for (;;) { | |
1248 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1249 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1250 | if (sock->state == SS_DISCONNECTING) { |
1251 | err = -ENOTCONN; | |
1252 | break; | |
1253 | } | |
1254 | release_sock(sk); | |
1255 | timeo = schedule_timeout(timeo); | |
1256 | lock_sock(sk); | |
1257 | } | |
1258 | err = 0; | |
1259 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1260 | break; | |
9bbb4ecc YX |
1261 | err = -EAGAIN; |
1262 | if (!timeo) | |
1263 | break; | |
143fe22f EH |
1264 | err = sock_intr_errno(timeo); |
1265 | if (signal_pending(current)) | |
1266 | break; | |
9bbb4ecc YX |
1267 | } |
1268 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1269 | *timeop = timeo; |
9bbb4ecc YX |
1270 | return err; |
1271 | } | |
1272 | ||
c4307285 | 1273 | /** |
247f0f3c | 1274 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1275 | * @m: descriptor for message info |
1276 | * @buf_len: total size of user buffer area | |
1277 | * @flags: receive flags | |
c4307285 | 1278 | * |
b97bf3fd PL |
1279 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1280 | * If the complete message doesn't fit in user area, truncate it. | |
1281 | * | |
1282 | * Returns size of returned message data, errno otherwise | |
1283 | */ | |
1b784140 YX |
1284 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1285 | int flags) | |
b97bf3fd | 1286 | { |
0c3141e9 | 1287 | struct sock *sk = sock->sk; |
58ed9442 | 1288 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1289 | struct sk_buff *buf; |
1290 | struct tipc_msg *msg; | |
9bbb4ecc | 1291 | long timeo; |
b97bf3fd PL |
1292 | unsigned int sz; |
1293 | u32 err; | |
1294 | int res; | |
1295 | ||
0c3141e9 | 1296 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1297 | if (unlikely(!buf_len)) |
1298 | return -EINVAL; | |
1299 | ||
0c3141e9 | 1300 | lock_sock(sk); |
b97bf3fd | 1301 | |
0c3141e9 AS |
1302 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1303 | res = -ENOTCONN; | |
b97bf3fd PL |
1304 | goto exit; |
1305 | } | |
1306 | ||
9bbb4ecc | 1307 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1308 | restart: |
b97bf3fd | 1309 | |
0c3141e9 | 1310 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1311 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1312 | if (res) |
1313 | goto exit; | |
b97bf3fd | 1314 | |
0c3141e9 | 1315 | /* Look at first message in receive queue */ |
0c3141e9 | 1316 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1317 | msg = buf_msg(buf); |
1318 | sz = msg_data_sz(msg); | |
1319 | err = msg_errcode(msg); | |
1320 | ||
b97bf3fd | 1321 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1322 | if ((!sz) && (!err)) { |
2e84c60b | 1323 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1324 | goto restart; |
1325 | } | |
1326 | ||
1327 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1328 | set_orig_addr(m, msg); |
1329 | ||
1330 | /* Capture ancillary data (optional) */ | |
301bae56 | 1331 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1332 | if (res) |
b97bf3fd PL |
1333 | goto exit; |
1334 | ||
1335 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1336 | if (!err) { |
1337 | if (unlikely(buf_len < sz)) { | |
1338 | sz = buf_len; | |
1339 | m->msg_flags |= MSG_TRUNC; | |
1340 | } | |
51f3d02b | 1341 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
0232fd0a | 1342 | if (res) |
b97bf3fd | 1343 | goto exit; |
b97bf3fd PL |
1344 | res = sz; |
1345 | } else { | |
1346 | if ((sock->state == SS_READY) || | |
1347 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1348 | res = 0; | |
1349 | else | |
1350 | res = -ECONNRESET; | |
1351 | } | |
1352 | ||
1353 | /* Consume received message (optional) */ | |
b97bf3fd | 1354 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1355 | if ((sock->state != SS_READY) && |
60120526 | 1356 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1357 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1358 | tsk->rcv_unacked = 0; |
1359 | } | |
2e84c60b | 1360 | tsk_advance_rx_queue(sk); |
c4307285 | 1361 | } |
b97bf3fd | 1362 | exit: |
0c3141e9 | 1363 | release_sock(sk); |
b97bf3fd PL |
1364 | return res; |
1365 | } | |
1366 | ||
c4307285 | 1367 | /** |
247f0f3c | 1368 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1369 | * @m: descriptor for message info |
1370 | * @buf_len: total size of user buffer area | |
1371 | * @flags: receive flags | |
c4307285 YH |
1372 | * |
1373 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1374 | * will optionally wait for more; never truncates data. |
1375 | * | |
1376 | * Returns size of returned message data, errno otherwise | |
1377 | */ | |
1b784140 YX |
1378 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1379 | size_t buf_len, int flags) | |
b97bf3fd | 1380 | { |
0c3141e9 | 1381 | struct sock *sk = sock->sk; |
58ed9442 | 1382 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1383 | struct sk_buff *buf; |
1384 | struct tipc_msg *msg; | |
9bbb4ecc | 1385 | long timeo; |
b97bf3fd | 1386 | unsigned int sz; |
3720d40b | 1387 | int sz_to_copy, target, needed; |
b97bf3fd | 1388 | int sz_copied = 0; |
b97bf3fd | 1389 | u32 err; |
0c3141e9 | 1390 | int res = 0; |
b97bf3fd | 1391 | |
0c3141e9 | 1392 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1393 | if (unlikely(!buf_len)) |
1394 | return -EINVAL; | |
1395 | ||
0c3141e9 | 1396 | lock_sock(sk); |
b97bf3fd | 1397 | |
9bbb4ecc | 1398 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1399 | res = -ENOTCONN; |
b97bf3fd PL |
1400 | goto exit; |
1401 | } | |
1402 | ||
3720d40b | 1403 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1404 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1405 | |
617d3c7a | 1406 | restart: |
0c3141e9 | 1407 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1408 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1409 | if (res) |
1410 | goto exit; | |
b97bf3fd | 1411 | |
0c3141e9 | 1412 | /* Look at first message in receive queue */ |
0c3141e9 | 1413 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1414 | msg = buf_msg(buf); |
1415 | sz = msg_data_sz(msg); | |
1416 | err = msg_errcode(msg); | |
1417 | ||
1418 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1419 | if ((!sz) && (!err)) { |
2e84c60b | 1420 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1421 | goto restart; |
1422 | } | |
1423 | ||
1424 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1425 | if (sz_copied == 0) { |
1426 | set_orig_addr(m, msg); | |
301bae56 | 1427 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1428 | if (res) |
b97bf3fd PL |
1429 | goto exit; |
1430 | } | |
1431 | ||
1432 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1433 | if (!err) { |
0232fd0a | 1434 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1435 | |
0232fd0a | 1436 | sz -= offset; |
b97bf3fd PL |
1437 | needed = (buf_len - sz_copied); |
1438 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a | 1439 | |
51f3d02b DM |
1440 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
1441 | m, sz_to_copy); | |
0232fd0a | 1442 | if (res) |
b97bf3fd | 1443 | goto exit; |
0232fd0a | 1444 | |
b97bf3fd PL |
1445 | sz_copied += sz_to_copy; |
1446 | ||
1447 | if (sz_to_copy < sz) { | |
1448 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1449 | TIPC_SKB_CB(buf)->handle = |
1450 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1451 | goto exit; |
1452 | } | |
b97bf3fd PL |
1453 | } else { |
1454 | if (sz_copied != 0) | |
1455 | goto exit; /* can't add error msg to valid data */ | |
1456 | ||
1457 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1458 | res = 0; | |
1459 | else | |
1460 | res = -ECONNRESET; | |
1461 | } | |
1462 | ||
1463 | /* Consume received message (optional) */ | |
b97bf3fd | 1464 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1465 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1466 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1467 | tsk->rcv_unacked = 0; |
1468 | } | |
2e84c60b | 1469 | tsk_advance_rx_queue(sk); |
c4307285 | 1470 | } |
b97bf3fd PL |
1471 | |
1472 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1473 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1474 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1475 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1476 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1477 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1478 | goto restart; |
1479 | ||
1480 | exit: | |
0c3141e9 | 1481 | release_sock(sk); |
a3b0a5a9 | 1482 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1483 | } |
1484 | ||
f288bef4 YX |
1485 | /** |
1486 | * tipc_write_space - wake up thread if port congestion is released | |
1487 | * @sk: socket | |
1488 | */ | |
1489 | static void tipc_write_space(struct sock *sk) | |
1490 | { | |
1491 | struct socket_wq *wq; | |
1492 | ||
1493 | rcu_read_lock(); | |
1494 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1495 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1496 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1497 | POLLWRNORM | POLLWRBAND); | |
1498 | rcu_read_unlock(); | |
1499 | } | |
1500 | ||
1501 | /** | |
1502 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1503 | * @sk: socket | |
1504 | * @len: the length of messages | |
1505 | */ | |
676d2369 | 1506 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1507 | { |
1508 | struct socket_wq *wq; | |
1509 | ||
1510 | rcu_read_lock(); | |
1511 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1512 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1513 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1514 | POLLRDNORM | POLLRDBAND); | |
1515 | rcu_read_unlock(); | |
1516 | } | |
1517 | ||
7e6c131e YX |
1518 | /** |
1519 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1520 | * @tsk: TIPC socket |
1186adf7 | 1521 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1522 | * |
cda3696d | 1523 | * Returns true if everything ok, false otherwise |
7e6c131e | 1524 | */ |
cda3696d | 1525 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1526 | { |
58ed9442 | 1527 | struct sock *sk = &tsk->sk; |
f2f9800d | 1528 | struct net *net = sock_net(sk); |
8826cde6 | 1529 | struct socket *sock = sk->sk_socket; |
cda3696d | 1530 | struct tipc_msg *hdr = buf_msg(skb); |
7e6c131e | 1531 | |
cda3696d JPM |
1532 | if (unlikely(msg_mcast(hdr))) |
1533 | return false; | |
7e6c131e YX |
1534 | |
1535 | switch ((int)sock->state) { | |
1536 | case SS_CONNECTED: | |
cda3696d | 1537 | |
7e6c131e | 1538 | /* Accept only connection-based messages sent by peer */ |
cda3696d JPM |
1539 | if (unlikely(!tsk_peer_msg(tsk, hdr))) |
1540 | return false; | |
1541 | ||
1542 | if (unlikely(msg_errcode(hdr))) { | |
1543 | sock->state = SS_DISCONNECTING; | |
1544 | tsk->connected = 0; | |
1545 | /* Let timer expire on it's own */ | |
1546 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
1547 | tsk->portid); | |
7e6c131e | 1548 | } |
cda3696d JPM |
1549 | return true; |
1550 | ||
7e6c131e | 1551 | case SS_CONNECTING: |
dadebc00 | 1552 | |
cda3696d JPM |
1553 | /* Accept only ACK or NACK message */ |
1554 | if (unlikely(!msg_connected(hdr))) | |
1555 | return false; | |
dadebc00 | 1556 | |
cda3696d | 1557 | if (unlikely(msg_errcode(hdr))) { |
584d24b3 | 1558 | sock->state = SS_DISCONNECTING; |
2c8d8518 | 1559 | sk->sk_err = ECONNREFUSED; |
cda3696d | 1560 | return true; |
584d24b3 YX |
1561 | } |
1562 | ||
cda3696d | 1563 | if (unlikely(!msg_isdata(hdr))) { |
584d24b3 | 1564 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1565 | sk->sk_err = EINVAL; |
cda3696d | 1566 | return true; |
584d24b3 YX |
1567 | } |
1568 | ||
cda3696d JPM |
1569 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1570 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 JPM |
1571 | sock->state = SS_CONNECTED; |
1572 | ||
cda3696d JPM |
1573 | /* If 'ACK+' message, add to socket receive queue */ |
1574 | if (msg_data_sz(hdr)) | |
1575 | return true; | |
1576 | ||
1577 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
1578 | if (waitqueue_active(sk_sleep(sk))) | |
1579 | wake_up_interruptible(sk_sleep(sk)); | |
1580 | ||
1581 | /* 'ACK-' message is neither accepted nor rejected: */ | |
1582 | msg_set_dest_droppable(hdr, 1); | |
1583 | return false; | |
1584 | ||
7e6c131e YX |
1585 | case SS_LISTENING: |
1586 | case SS_UNCONNECTED: | |
cda3696d | 1587 | |
7e6c131e | 1588 | /* Accept only SYN message */ |
cda3696d JPM |
1589 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
1590 | return true; | |
7e6c131e YX |
1591 | break; |
1592 | case SS_DISCONNECTING: | |
1593 | break; | |
1594 | default: | |
1595 | pr_err("Unknown socket state %u\n", sock->state); | |
1596 | } | |
cda3696d | 1597 | return false; |
7e6c131e YX |
1598 | } |
1599 | ||
aba79f33 YX |
1600 | /** |
1601 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1602 | * @sk: socket | |
1603 | * @buf: message | |
1604 | * | |
1605 | * For all connection oriented messages, irrespective of importance, | |
1606 | * the default overload value (i.e. 67MB) is set as limit. | |
1607 | * | |
1608 | * For all connectionless messages, by default new queue limits are | |
1609 | * as belows: | |
1610 | * | |
cc79dd1b YX |
1611 | * TIPC_LOW_IMPORTANCE (4 MB) |
1612 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1613 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1614 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1615 | * |
1616 | * Returns overload limit according to corresponding message importance | |
1617 | */ | |
1618 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1619 | { | |
1620 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1621 | |
1622 | if (msg_connected(msg)) | |
0cee6bbe | 1623 | return sysctl_tipc_rmem[2]; |
1624 | ||
1625 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1626 | msg_importance(msg); | |
aba79f33 YX |
1627 | } |
1628 | ||
c4307285 | 1629 | /** |
0c3141e9 AS |
1630 | * filter_rcv - validate incoming message |
1631 | * @sk: socket | |
cda3696d | 1632 | * @skb: pointer to message. |
c4307285 | 1633 | * |
0c3141e9 AS |
1634 | * Enqueues message on receive queue if acceptable; optionally handles |
1635 | * disconnect indication for a connected socket. | |
1636 | * | |
1186adf7 | 1637 | * Called with socket lock already taken |
c4307285 | 1638 | * |
cda3696d | 1639 | * Returns true if message was added to socket receive queue, otherwise false |
b97bf3fd | 1640 | */ |
cda3696d | 1641 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb) |
b97bf3fd | 1642 | { |
0c3141e9 | 1643 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1644 | struct tipc_sock *tsk = tipc_sk(sk); |
cda3696d JPM |
1645 | struct tipc_msg *hdr = buf_msg(skb); |
1646 | unsigned int limit = rcvbuf_limit(sk, skb); | |
1647 | int err = TIPC_OK; | |
1648 | int usr = msg_user(hdr); | |
b97bf3fd | 1649 | |
cda3696d JPM |
1650 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
1651 | tipc_sk_proto_rcv(tsk, skb); | |
1652 | return false; | |
1186adf7 | 1653 | } |
ec8a2e56 | 1654 | |
cda3696d JPM |
1655 | if (unlikely(usr == SOCK_WAKEUP)) { |
1656 | kfree_skb(skb); | |
50100a5e JPM |
1657 | tsk->link_cong = 0; |
1658 | sk->sk_write_space(sk); | |
cda3696d | 1659 | return false; |
50100a5e JPM |
1660 | } |
1661 | ||
cda3696d JPM |
1662 | /* Drop if illegal message type */ |
1663 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { | |
1664 | kfree_skb(skb); | |
1665 | return false; | |
1666 | } | |
0c3141e9 | 1667 | |
cda3696d JPM |
1668 | /* Reject if wrong message type for current socket state */ |
1669 | if (unlikely(sock->state == SS_READY)) { | |
1670 | if (msg_connected(hdr)) { | |
1671 | err = TIPC_ERR_NO_PORT; | |
1672 | goto reject; | |
1673 | } | |
1674 | } else if (unlikely(!filter_connect(tsk, skb))) { | |
1675 | err = TIPC_ERR_NO_PORT; | |
1676 | goto reject; | |
b97bf3fd PL |
1677 | } |
1678 | ||
1679 | /* Reject message if there isn't room to queue it */ | |
cda3696d JPM |
1680 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
1681 | err = TIPC_ERR_OVERLOAD; | |
1682 | goto reject; | |
1683 | } | |
b97bf3fd | 1684 | |
aba79f33 | 1685 | /* Enqueue message */ |
cda3696d JPM |
1686 | TIPC_SKB_CB(skb)->handle = NULL; |
1687 | __skb_queue_tail(&sk->sk_receive_queue, skb); | |
1688 | skb_set_owner_r(skb, sk); | |
0c3141e9 | 1689 | |
676d2369 | 1690 | sk->sk_data_ready(sk); |
cda3696d JPM |
1691 | return true; |
1692 | ||
1693 | reject: | |
1694 | tipc_sk_respond(sk, skb, err); | |
1695 | return false; | |
0c3141e9 | 1696 | } |
b97bf3fd | 1697 | |
0c3141e9 | 1698 | /** |
4f4482dc | 1699 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1700 | * @sk: socket |
a6ca1094 | 1701 | * @skb: message |
0c3141e9 | 1702 | * |
e3a77561 | 1703 | * Caller must hold socket lock |
0c3141e9 AS |
1704 | * |
1705 | * Returns 0 | |
1706 | */ | |
a6ca1094 | 1707 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1708 | { |
cda3696d | 1709 | unsigned int truesize = skb->truesize; |
0c3141e9 | 1710 | |
cda3696d JPM |
1711 | if (likely(filter_rcv(sk, skb))) |
1712 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); | |
0c3141e9 AS |
1713 | return 0; |
1714 | } | |
1715 | ||
d570d864 | 1716 | /** |
c637c103 JPM |
1717 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1718 | * inputq and try adding them to socket or backlog queue | |
1719 | * @inputq: list of incoming buffers with potentially different destinations | |
1720 | * @sk: socket where the buffers should be enqueued | |
1721 | * @dport: port number for the socket | |
d570d864 JPM |
1722 | * |
1723 | * Caller must hold socket lock | |
d570d864 | 1724 | */ |
cda3696d JPM |
1725 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
1726 | u32 dport) | |
d570d864 JPM |
1727 | { |
1728 | unsigned int lim; | |
1729 | atomic_t *dcnt; | |
c637c103 JPM |
1730 | struct sk_buff *skb; |
1731 | unsigned long time_limit = jiffies + 2; | |
1732 | ||
1733 | while (skb_queue_len(inputq)) { | |
51a00daf | 1734 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
1735 | return; |
1736 | ||
c637c103 JPM |
1737 | skb = tipc_skb_dequeue(inputq, dport); |
1738 | if (unlikely(!skb)) | |
cda3696d JPM |
1739 | return; |
1740 | ||
1741 | /* Add message directly to receive queue if possible */ | |
c637c103 | 1742 | if (!sock_owned_by_user(sk)) { |
cda3696d JPM |
1743 | filter_rcv(sk, skb); |
1744 | continue; | |
c637c103 | 1745 | } |
cda3696d JPM |
1746 | |
1747 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 JPM |
1748 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
1749 | if (sk->sk_backlog.len) | |
1750 | atomic_set(dcnt, 0); | |
1751 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1752 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1753 | continue; | |
cda3696d JPM |
1754 | |
1755 | /* Overload => reject message back to sender */ | |
1756 | tipc_sk_respond(sk, skb, TIPC_ERR_OVERLOAD); | |
1757 | break; | |
c637c103 | 1758 | } |
d570d864 JPM |
1759 | } |
1760 | ||
0c3141e9 | 1761 | /** |
c637c103 JPM |
1762 | * tipc_sk_rcv - handle a chain of incoming buffers |
1763 | * @inputq: buffer list containing the buffers | |
1764 | * Consumes all buffers in list until inputq is empty | |
1765 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 1766 | */ |
cda3696d | 1767 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1768 | { |
c637c103 | 1769 | u32 dnode, dport = 0; |
9871b27f | 1770 | int err; |
9816f061 | 1771 | struct tipc_sock *tsk; |
9816f061 | 1772 | struct sock *sk; |
cda3696d | 1773 | struct sk_buff *skb; |
9816f061 | 1774 | |
c637c103 | 1775 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
1776 | dport = tipc_skb_peek_port(inputq, dport); |
1777 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 1778 | |
c637c103 JPM |
1779 | if (likely(tsk)) { |
1780 | sk = &tsk->sk; | |
1781 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
cda3696d | 1782 | tipc_sk_enqueue(inputq, sk, dport); |
c637c103 | 1783 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 JPM |
1784 | } |
1785 | sock_put(sk); | |
c637c103 | 1786 | continue; |
c637c103 | 1787 | } |
cda3696d JPM |
1788 | |
1789 | /* No destination socket => dequeue skb if still there */ | |
1790 | skb = tipc_skb_dequeue(inputq, dport); | |
1791 | if (!skb) | |
1792 | return; | |
1793 | ||
1794 | /* Try secondary lookup if unresolved named message */ | |
1795 | err = TIPC_ERR_NO_PORT; | |
1796 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
1797 | goto xmit; | |
1798 | ||
1799 | /* Prepare for message rejection */ | |
1800 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 1801 | continue; |
e3a77561 | 1802 | xmit: |
cda3696d | 1803 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 1804 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 1805 | } |
b97bf3fd PL |
1806 | } |
1807 | ||
78eb3a53 YX |
1808 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1809 | { | |
1810 | struct sock *sk = sock->sk; | |
1811 | DEFINE_WAIT(wait); | |
1812 | int done; | |
1813 | ||
1814 | do { | |
1815 | int err = sock_error(sk); | |
1816 | if (err) | |
1817 | return err; | |
1818 | if (!*timeo_p) | |
1819 | return -ETIMEDOUT; | |
1820 | if (signal_pending(current)) | |
1821 | return sock_intr_errno(*timeo_p); | |
1822 | ||
1823 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1824 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1825 | finish_wait(sk_sleep(sk), &wait); | |
1826 | } while (!done); | |
1827 | return 0; | |
1828 | } | |
1829 | ||
b97bf3fd | 1830 | /** |
247f0f3c | 1831 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1832 | * @sock: socket structure |
1833 | * @dest: socket address for destination port | |
1834 | * @destlen: size of socket address data structure | |
0c3141e9 | 1835 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1836 | * |
1837 | * Returns 0 on success, errno otherwise | |
1838 | */ | |
247f0f3c YX |
1839 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1840 | int destlen, int flags) | |
b97bf3fd | 1841 | { |
0c3141e9 | 1842 | struct sock *sk = sock->sk; |
f2f8036e | 1843 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1844 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1845 | struct msghdr m = {NULL,}; | |
f2f8036e | 1846 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
78eb3a53 | 1847 | socket_state previous; |
f2f8036e | 1848 | int res = 0; |
b89741a0 | 1849 | |
0c3141e9 AS |
1850 | lock_sock(sk); |
1851 | ||
f2f8036e | 1852 | /* DGRAM/RDM connect(), just save the destaddr */ |
0c3141e9 | 1853 | if (sock->state == SS_READY) { |
f2f8036e EH |
1854 | if (dst->family == AF_UNSPEC) { |
1855 | memset(&tsk->remote, 0, sizeof(struct sockaddr_tipc)); | |
1856 | tsk->connected = 0; | |
610600c8 SL |
1857 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1858 | res = -EINVAL; | |
f2f8036e EH |
1859 | } else { |
1860 | memcpy(&tsk->remote, dest, destlen); | |
1861 | tsk->connected = 1; | |
1862 | } | |
0c3141e9 AS |
1863 | goto exit; |
1864 | } | |
b89741a0 | 1865 | |
b89741a0 AS |
1866 | /* |
1867 | * Reject connection attempt using multicast address | |
1868 | * | |
1869 | * Note: send_msg() validates the rest of the address fields, | |
1870 | * so there's no need to do it here | |
1871 | */ | |
0c3141e9 AS |
1872 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1873 | res = -EINVAL; | |
1874 | goto exit; | |
1875 | } | |
1876 | ||
78eb3a53 | 1877 | previous = sock->state; |
584d24b3 YX |
1878 | switch (sock->state) { |
1879 | case SS_UNCONNECTED: | |
1880 | /* Send a 'SYN-' to destination */ | |
1881 | m.msg_name = dest; | |
1882 | m.msg_namelen = destlen; | |
1883 | ||
1884 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1885 | * indicate send_msg() is never blocked. | |
1886 | */ | |
1887 | if (!timeout) | |
1888 | m.msg_flags = MSG_DONTWAIT; | |
1889 | ||
39a0295f | 1890 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1891 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1892 | goto exit; | |
1893 | ||
1894 | /* Just entered SS_CONNECTING state; the only | |
1895 | * difference is that return value in non-blocking | |
1896 | * case is EINPROGRESS, rather than EALREADY. | |
1897 | */ | |
1898 | res = -EINPROGRESS; | |
584d24b3 | 1899 | case SS_CONNECTING: |
78eb3a53 YX |
1900 | if (previous == SS_CONNECTING) |
1901 | res = -EALREADY; | |
1902 | if (!timeout) | |
1903 | goto exit; | |
1904 | timeout = msecs_to_jiffies(timeout); | |
1905 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1906 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1907 | break; |
1908 | case SS_CONNECTED: | |
1909 | res = -EISCONN; | |
1910 | break; | |
1911 | default: | |
1912 | res = -EINVAL; | |
78eb3a53 | 1913 | break; |
b89741a0 | 1914 | } |
0c3141e9 AS |
1915 | exit: |
1916 | release_sock(sk); | |
b89741a0 | 1917 | return res; |
b97bf3fd PL |
1918 | } |
1919 | ||
c4307285 | 1920 | /** |
247f0f3c | 1921 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1922 | * @sock: socket structure |
1923 | * @len: (unused) | |
c4307285 | 1924 | * |
b97bf3fd PL |
1925 | * Returns 0 on success, errno otherwise |
1926 | */ | |
247f0f3c | 1927 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1928 | { |
0c3141e9 AS |
1929 | struct sock *sk = sock->sk; |
1930 | int res; | |
1931 | ||
1932 | lock_sock(sk); | |
b97bf3fd | 1933 | |
245f3d34 | 1934 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1935 | res = -EINVAL; |
1936 | else { | |
1937 | sock->state = SS_LISTENING; | |
1938 | res = 0; | |
1939 | } | |
1940 | ||
1941 | release_sock(sk); | |
1942 | return res; | |
b97bf3fd PL |
1943 | } |
1944 | ||
6398e23c YX |
1945 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1946 | { | |
1947 | struct sock *sk = sock->sk; | |
1948 | DEFINE_WAIT(wait); | |
1949 | int err; | |
1950 | ||
1951 | /* True wake-one mechanism for incoming connections: only | |
1952 | * one process gets woken up, not the 'whole herd'. | |
1953 | * Since we do not 'race & poll' for established sockets | |
1954 | * anymore, the common case will execute the loop only once. | |
1955 | */ | |
1956 | for (;;) { | |
1957 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1958 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1959 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1960 | release_sock(sk); |
1961 | timeo = schedule_timeout(timeo); | |
1962 | lock_sock(sk); | |
1963 | } | |
1964 | err = 0; | |
1965 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1966 | break; | |
1967 | err = -EINVAL; | |
1968 | if (sock->state != SS_LISTENING) | |
1969 | break; | |
6398e23c YX |
1970 | err = -EAGAIN; |
1971 | if (!timeo) | |
1972 | break; | |
143fe22f EH |
1973 | err = sock_intr_errno(timeo); |
1974 | if (signal_pending(current)) | |
1975 | break; | |
6398e23c YX |
1976 | } |
1977 | finish_wait(sk_sleep(sk), &wait); | |
1978 | return err; | |
1979 | } | |
1980 | ||
c4307285 | 1981 | /** |
247f0f3c | 1982 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1983 | * @sock: listening socket |
1984 | * @newsock: new socket that is to be connected | |
1985 | * @flags: file-related flags associated with socket | |
c4307285 | 1986 | * |
b97bf3fd PL |
1987 | * Returns 0 on success, errno otherwise |
1988 | */ | |
247f0f3c | 1989 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1990 | { |
0fef8f20 | 1991 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1992 | struct sk_buff *buf; |
301bae56 | 1993 | struct tipc_sock *new_tsock; |
0fef8f20 | 1994 | struct tipc_msg *msg; |
6398e23c | 1995 | long timeo; |
0c3141e9 | 1996 | int res; |
b97bf3fd | 1997 | |
0c3141e9 | 1998 | lock_sock(sk); |
b97bf3fd | 1999 | |
0c3141e9 AS |
2000 | if (sock->state != SS_LISTENING) { |
2001 | res = -EINVAL; | |
b97bf3fd PL |
2002 | goto exit; |
2003 | } | |
6398e23c YX |
2004 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2005 | res = tipc_wait_for_accept(sock, timeo); | |
2006 | if (res) | |
2007 | goto exit; | |
0c3141e9 AS |
2008 | |
2009 | buf = skb_peek(&sk->sk_receive_queue); | |
2010 | ||
c5fa7b3c | 2011 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
2012 | if (res) |
2013 | goto exit; | |
fdd75ea8 | 2014 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2015 | |
0fef8f20 | 2016 | new_sk = new_sock->sk; |
301bae56 | 2017 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2018 | msg = buf_msg(buf); |
b97bf3fd | 2019 | |
0fef8f20 PG |
2020 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2021 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2022 | ||
2023 | /* | |
2024 | * Reject any stray messages received by new socket | |
2025 | * before the socket lock was taken (very, very unlikely) | |
2026 | */ | |
2e84c60b | 2027 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2028 | |
2029 | /* Connect new socket to it's peer */ | |
301bae56 | 2030 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2031 | new_sock->state = SS_CONNECTED; |
2032 | ||
301bae56 | 2033 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2034 | if (msg_named(msg)) { |
301bae56 JPM |
2035 | new_tsock->conn_type = msg_nametype(msg); |
2036 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2037 | } |
0fef8f20 PG |
2038 | |
2039 | /* | |
2040 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2041 | * Respond to 'SYN+' by queuing it on new socket. | |
2042 | */ | |
2043 | if (!msg_data_sz(msg)) { | |
2044 | struct msghdr m = {NULL,}; | |
2045 | ||
2e84c60b | 2046 | tsk_advance_rx_queue(sk); |
39a0295f | 2047 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2048 | } else { |
2049 | __skb_dequeue(&sk->sk_receive_queue); | |
2050 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2051 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2052 | } |
2053 | release_sock(new_sk); | |
b97bf3fd | 2054 | exit: |
0c3141e9 | 2055 | release_sock(sk); |
b97bf3fd PL |
2056 | return res; |
2057 | } | |
2058 | ||
2059 | /** | |
247f0f3c | 2060 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2061 | * @sock: socket structure |
e247a8f5 | 2062 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2063 | * |
2064 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2065 | * |
b97bf3fd PL |
2066 | * Returns 0 on success, errno otherwise |
2067 | */ | |
247f0f3c | 2068 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2069 | { |
0c3141e9 | 2070 | struct sock *sk = sock->sk; |
f2f9800d | 2071 | struct net *net = sock_net(sk); |
58ed9442 | 2072 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2073 | struct sk_buff *skb; |
cda3696d JPM |
2074 | u32 dnode = tsk_peer_node(tsk); |
2075 | u32 dport = tsk_peer_port(tsk); | |
2076 | u32 onode = tipc_own_addr(net); | |
2077 | u32 oport = tsk->portid; | |
b97bf3fd PL |
2078 | int res; |
2079 | ||
e247a8f5 AS |
2080 | if (how != SHUT_RDWR) |
2081 | return -EINVAL; | |
b97bf3fd | 2082 | |
0c3141e9 | 2083 | lock_sock(sk); |
b97bf3fd PL |
2084 | |
2085 | switch (sock->state) { | |
0c3141e9 | 2086 | case SS_CONNECTING: |
b97bf3fd PL |
2087 | case SS_CONNECTED: |
2088 | ||
b97bf3fd | 2089 | restart: |
bcd3ffd4 JPM |
2090 | dnode = tsk_peer_node(tsk); |
2091 | ||
617d3c7a | 2092 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2093 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2094 | if (skb) { | |
2095 | if (TIPC_SKB_CB(skb)->handle != NULL) { | |
2096 | kfree_skb(skb); | |
b97bf3fd PL |
2097 | goto restart; |
2098 | } | |
bcd3ffd4 | 2099 | tipc_sk_respond(sk, skb, TIPC_CONN_SHUTDOWN); |
0c3141e9 | 2100 | } else { |
c5898636 | 2101 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
80e44c22 | 2102 | TIPC_CONN_MSG, SHORT_H_SIZE, |
cda3696d JPM |
2103 | 0, dnode, onode, dport, oport, |
2104 | TIPC_CONN_SHUTDOWN); | |
af9b028e | 2105 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); |
b97bf3fd | 2106 | } |
301bae56 | 2107 | tsk->connected = 0; |
0c3141e9 | 2108 | sock->state = SS_DISCONNECTING; |
f2f9800d | 2109 | tipc_node_remove_conn(net, dnode, tsk->portid); |
b97bf3fd PL |
2110 | /* fall through */ |
2111 | ||
2112 | case SS_DISCONNECTING: | |
2113 | ||
75031151 | 2114 | /* Discard any unreceived messages */ |
57467e56 | 2115 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2116 | |
2117 | /* Wake up anyone sleeping in poll */ | |
2118 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2119 | res = 0; |
2120 | break; | |
2121 | ||
2122 | default: | |
2123 | res = -ENOTCONN; | |
2124 | } | |
2125 | ||
0c3141e9 | 2126 | release_sock(sk); |
b97bf3fd PL |
2127 | return res; |
2128 | } | |
2129 | ||
f2f2a96a | 2130 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2131 | { |
f2f2a96a YX |
2132 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2133 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2134 | struct sk_buff *skb = NULL; |
57289015 | 2135 | u32 peer_port, peer_node; |
c5898636 | 2136 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2137 | |
6c9808ce | 2138 | bh_lock_sock(sk); |
301bae56 | 2139 | if (!tsk->connected) { |
6c9808ce JPM |
2140 | bh_unlock_sock(sk); |
2141 | goto exit; | |
57289015 | 2142 | } |
301bae56 JPM |
2143 | peer_port = tsk_peer_port(tsk); |
2144 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2145 | |
301bae56 | 2146 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
b3be5e3e EH |
2147 | if (!sock_owned_by_user(sk)) { |
2148 | sk->sk_socket->state = SS_DISCONNECTING; | |
2149 | tsk->connected = 0; | |
2150 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
2151 | tsk_peer_port(tsk)); | |
2152 | sk->sk_state_change(sk); | |
2153 | } else { | |
2154 | /* Try again later */ | |
2155 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2156 | } | |
2157 | ||
57289015 | 2158 | } else { |
c5898636 JPM |
2159 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
2160 | INT_H_SIZE, 0, peer_node, own_node, | |
f2f2a96a | 2161 | peer_port, tsk->portid, TIPC_OK); |
301bae56 | 2162 | tsk->probing_state = TIPC_CONN_PROBING; |
3721e9c7 | 2163 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2164 | } |
2165 | bh_unlock_sock(sk); | |
a6ca1094 | 2166 | if (skb) |
af9b028e | 2167 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2168 | exit: |
07f6c4bc | 2169 | sock_put(sk); |
57289015 JPM |
2170 | } |
2171 | ||
301bae56 | 2172 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2173 | struct tipc_name_seq const *seq) |
2174 | { | |
f2f9800d | 2175 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2176 | struct publication *publ; |
2177 | u32 key; | |
2178 | ||
301bae56 | 2179 | if (tsk->connected) |
0fc87aae | 2180 | return -EINVAL; |
07f6c4bc YX |
2181 | key = tsk->portid + tsk->pub_count + 1; |
2182 | if (key == tsk->portid) | |
0fc87aae JPM |
2183 | return -EADDRINUSE; |
2184 | ||
f2f9800d | 2185 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2186 | scope, tsk->portid, key); |
0fc87aae JPM |
2187 | if (unlikely(!publ)) |
2188 | return -EINVAL; | |
2189 | ||
301bae56 JPM |
2190 | list_add(&publ->pport_list, &tsk->publications); |
2191 | tsk->pub_count++; | |
2192 | tsk->published = 1; | |
0fc87aae JPM |
2193 | return 0; |
2194 | } | |
2195 | ||
301bae56 | 2196 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2197 | struct tipc_name_seq const *seq) |
2198 | { | |
f2f9800d | 2199 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2200 | struct publication *publ; |
2201 | struct publication *safe; | |
2202 | int rc = -EINVAL; | |
2203 | ||
301bae56 | 2204 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2205 | if (seq) { |
2206 | if (publ->scope != scope) | |
2207 | continue; | |
2208 | if (publ->type != seq->type) | |
2209 | continue; | |
2210 | if (publ->lower != seq->lower) | |
2211 | continue; | |
2212 | if (publ->upper != seq->upper) | |
2213 | break; | |
f2f9800d | 2214 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2215 | publ->ref, publ->key); |
2216 | rc = 0; | |
2217 | break; | |
2218 | } | |
f2f9800d | 2219 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2220 | publ->ref, publ->key); |
2221 | rc = 0; | |
2222 | } | |
301bae56 JPM |
2223 | if (list_empty(&tsk->publications)) |
2224 | tsk->published = 0; | |
0fc87aae JPM |
2225 | return rc; |
2226 | } | |
2227 | ||
5a9ee0be JPM |
2228 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2229 | * when we go from standalone to network mode. | |
2230 | */ | |
e05b31f4 | 2231 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2232 | { |
e05b31f4 | 2233 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2234 | const struct bucket_table *tbl; |
2235 | struct rhash_head *pos; | |
2236 | struct tipc_sock *tsk; | |
5a9ee0be | 2237 | struct tipc_msg *msg; |
07f6c4bc | 2238 | int i; |
5a9ee0be | 2239 | |
07f6c4bc | 2240 | rcu_read_lock(); |
e05b31f4 | 2241 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2242 | for (i = 0; i < tbl->size; i++) { |
2243 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2244 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2245 | msg = &tsk->phdr; | |
34747539 YX |
2246 | msg_set_prevnode(msg, tn->own_addr); |
2247 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2248 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2249 | } | |
5a9ee0be | 2250 | } |
07f6c4bc | 2251 | rcu_read_unlock(); |
5a9ee0be JPM |
2252 | } |
2253 | ||
e05b31f4 | 2254 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2255 | { |
e05b31f4 | 2256 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2257 | struct tipc_sock *tsk; |
808d90f9 | 2258 | |
07f6c4bc | 2259 | rcu_read_lock(); |
6cca7289 | 2260 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2261 | if (tsk) |
2262 | sock_hold(&tsk->sk); | |
2263 | rcu_read_unlock(); | |
808d90f9 | 2264 | |
07f6c4bc | 2265 | return tsk; |
808d90f9 JPM |
2266 | } |
2267 | ||
07f6c4bc | 2268 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2269 | { |
e05b31f4 YX |
2270 | struct sock *sk = &tsk->sk; |
2271 | struct net *net = sock_net(sk); | |
2272 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2273 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2274 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2275 | |
07f6c4bc YX |
2276 | while (remaining--) { |
2277 | portid++; | |
2278 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2279 | portid = TIPC_MIN_PORT; | |
2280 | tsk->portid = portid; | |
2281 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2282 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2283 | tsk_rht_params)) | |
07f6c4bc YX |
2284 | return 0; |
2285 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2286 | } |
2287 | ||
07f6c4bc | 2288 | return -1; |
808d90f9 JPM |
2289 | } |
2290 | ||
07f6c4bc | 2291 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2292 | { |
07f6c4bc | 2293 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2294 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2295 | |
6cca7289 | 2296 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2297 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2298 | __sock_put(sk); | |
808d90f9 | 2299 | } |
808d90f9 JPM |
2300 | } |
2301 | ||
6cca7289 HX |
2302 | static const struct rhashtable_params tsk_rht_params = { |
2303 | .nelem_hint = 192, | |
2304 | .head_offset = offsetof(struct tipc_sock, node), | |
2305 | .key_offset = offsetof(struct tipc_sock, portid), | |
2306 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2307 | .max_size = 1048576, |
2308 | .min_size = 256, | |
b5e2c150 | 2309 | .automatic_shrinking = true, |
6cca7289 HX |
2310 | }; |
2311 | ||
e05b31f4 | 2312 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2313 | { |
e05b31f4 | 2314 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2315 | |
2316 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2317 | } |
2318 | ||
e05b31f4 | 2319 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2320 | { |
e05b31f4 YX |
2321 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2322 | ||
07f6c4bc YX |
2323 | /* Wait for socket readers to complete */ |
2324 | synchronize_net(); | |
808d90f9 | 2325 | |
e05b31f4 | 2326 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2327 | } |
2328 | ||
b97bf3fd | 2329 | /** |
247f0f3c | 2330 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2331 | * @sock: socket structure |
2332 | * @lvl: option level | |
2333 | * @opt: option identifier | |
2334 | * @ov: pointer to new option value | |
2335 | * @ol: length of option value | |
c4307285 YH |
2336 | * |
2337 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2338 | * (to ease compatibility). |
c4307285 | 2339 | * |
b97bf3fd PL |
2340 | * Returns 0 on success, errno otherwise |
2341 | */ | |
247f0f3c YX |
2342 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2343 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2344 | { |
0c3141e9 | 2345 | struct sock *sk = sock->sk; |
58ed9442 | 2346 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2347 | u32 value; |
2348 | int res; | |
2349 | ||
c4307285 YH |
2350 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2351 | return 0; | |
b97bf3fd PL |
2352 | if (lvl != SOL_TIPC) |
2353 | return -ENOPROTOOPT; | |
2354 | if (ol < sizeof(value)) | |
2355 | return -EINVAL; | |
2db9983a AS |
2356 | res = get_user(value, (u32 __user *)ov); |
2357 | if (res) | |
b97bf3fd PL |
2358 | return res; |
2359 | ||
0c3141e9 | 2360 | lock_sock(sk); |
c4307285 | 2361 | |
b97bf3fd PL |
2362 | switch (opt) { |
2363 | case TIPC_IMPORTANCE: | |
301bae56 | 2364 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2365 | break; |
2366 | case TIPC_SRC_DROPPABLE: | |
2367 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2368 | tsk_set_unreliable(tsk, value); |
c4307285 | 2369 | else |
b97bf3fd PL |
2370 | res = -ENOPROTOOPT; |
2371 | break; | |
2372 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2373 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2374 | break; |
2375 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2376 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2377 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2378 | break; |
2379 | default: | |
2380 | res = -EINVAL; | |
2381 | } | |
2382 | ||
0c3141e9 AS |
2383 | release_sock(sk); |
2384 | ||
b97bf3fd PL |
2385 | return res; |
2386 | } | |
2387 | ||
2388 | /** | |
247f0f3c | 2389 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2390 | * @sock: socket structure |
2391 | * @lvl: option level | |
2392 | * @opt: option identifier | |
2393 | * @ov: receptacle for option value | |
2394 | * @ol: receptacle for length of option value | |
c4307285 YH |
2395 | * |
2396 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2397 | * (to ease compatibility). |
c4307285 | 2398 | * |
b97bf3fd PL |
2399 | * Returns 0 on success, errno otherwise |
2400 | */ | |
247f0f3c YX |
2401 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2402 | char __user *ov, int __user *ol) | |
b97bf3fd | 2403 | { |
0c3141e9 | 2404 | struct sock *sk = sock->sk; |
58ed9442 | 2405 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2406 | int len; |
b97bf3fd | 2407 | u32 value; |
c4307285 | 2408 | int res; |
b97bf3fd | 2409 | |
c4307285 YH |
2410 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2411 | return put_user(0, ol); | |
b97bf3fd PL |
2412 | if (lvl != SOL_TIPC) |
2413 | return -ENOPROTOOPT; | |
2db9983a AS |
2414 | res = get_user(len, ol); |
2415 | if (res) | |
c4307285 | 2416 | return res; |
b97bf3fd | 2417 | |
0c3141e9 | 2418 | lock_sock(sk); |
b97bf3fd PL |
2419 | |
2420 | switch (opt) { | |
2421 | case TIPC_IMPORTANCE: | |
301bae56 | 2422 | value = tsk_importance(tsk); |
b97bf3fd PL |
2423 | break; |
2424 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2425 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2426 | break; |
2427 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2428 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2429 | break; |
2430 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2431 | value = tsk->conn_timeout; |
0c3141e9 | 2432 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2433 | break; |
0e65967e | 2434 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2435 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2436 | break; |
0e65967e | 2437 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2438 | value = skb_queue_len(&sk->sk_receive_queue); |
2439 | break; | |
b97bf3fd PL |
2440 | default: |
2441 | res = -EINVAL; | |
2442 | } | |
2443 | ||
0c3141e9 AS |
2444 | release_sock(sk); |
2445 | ||
25860c3b PG |
2446 | if (res) |
2447 | return res; /* "get" failed */ | |
b97bf3fd | 2448 | |
25860c3b PG |
2449 | if (len < sizeof(value)) |
2450 | return -EINVAL; | |
2451 | ||
2452 | if (copy_to_user(ov, &value, sizeof(value))) | |
2453 | return -EFAULT; | |
2454 | ||
2455 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2456 | } |
2457 | ||
f2f9800d | 2458 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2459 | { |
f2f9800d | 2460 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2461 | struct tipc_sioc_ln_req lnr; |
2462 | void __user *argp = (void __user *)arg; | |
2463 | ||
2464 | switch (cmd) { | |
2465 | case SIOCGETLINKNAME: | |
2466 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2467 | return -EFAULT; | |
f2f9800d YX |
2468 | if (!tipc_node_get_linkname(sock_net(sk), |
2469 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2470 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2471 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2472 | return -EFAULT; | |
2473 | return 0; | |
2474 | } | |
2475 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2476 | default: |
2477 | return -ENOIOCTLCMD; | |
2478 | } | |
2479 | } | |
2480 | ||
ae86b9e3 BH |
2481 | /* Protocol switches for the various types of TIPC sockets */ |
2482 | ||
bca65eae | 2483 | static const struct proto_ops msg_ops = { |
0e65967e | 2484 | .owner = THIS_MODULE, |
b97bf3fd | 2485 | .family = AF_TIPC, |
247f0f3c YX |
2486 | .release = tipc_release, |
2487 | .bind = tipc_bind, | |
2488 | .connect = tipc_connect, | |
5eee6a6d | 2489 | .socketpair = sock_no_socketpair, |
245f3d34 | 2490 | .accept = sock_no_accept, |
247f0f3c YX |
2491 | .getname = tipc_getname, |
2492 | .poll = tipc_poll, | |
78acb1f9 | 2493 | .ioctl = tipc_ioctl, |
245f3d34 | 2494 | .listen = sock_no_listen, |
247f0f3c YX |
2495 | .shutdown = tipc_shutdown, |
2496 | .setsockopt = tipc_setsockopt, | |
2497 | .getsockopt = tipc_getsockopt, | |
2498 | .sendmsg = tipc_sendmsg, | |
2499 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2500 | .mmap = sock_no_mmap, |
2501 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2502 | }; |
2503 | ||
bca65eae | 2504 | static const struct proto_ops packet_ops = { |
0e65967e | 2505 | .owner = THIS_MODULE, |
b97bf3fd | 2506 | .family = AF_TIPC, |
247f0f3c YX |
2507 | .release = tipc_release, |
2508 | .bind = tipc_bind, | |
2509 | .connect = tipc_connect, | |
5eee6a6d | 2510 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2511 | .accept = tipc_accept, |
2512 | .getname = tipc_getname, | |
2513 | .poll = tipc_poll, | |
78acb1f9 | 2514 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2515 | .listen = tipc_listen, |
2516 | .shutdown = tipc_shutdown, | |
2517 | .setsockopt = tipc_setsockopt, | |
2518 | .getsockopt = tipc_getsockopt, | |
2519 | .sendmsg = tipc_send_packet, | |
2520 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2521 | .mmap = sock_no_mmap, |
2522 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2523 | }; |
2524 | ||
bca65eae | 2525 | static const struct proto_ops stream_ops = { |
0e65967e | 2526 | .owner = THIS_MODULE, |
b97bf3fd | 2527 | .family = AF_TIPC, |
247f0f3c YX |
2528 | .release = tipc_release, |
2529 | .bind = tipc_bind, | |
2530 | .connect = tipc_connect, | |
5eee6a6d | 2531 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2532 | .accept = tipc_accept, |
2533 | .getname = tipc_getname, | |
2534 | .poll = tipc_poll, | |
78acb1f9 | 2535 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2536 | .listen = tipc_listen, |
2537 | .shutdown = tipc_shutdown, | |
2538 | .setsockopt = tipc_setsockopt, | |
2539 | .getsockopt = tipc_getsockopt, | |
2540 | .sendmsg = tipc_send_stream, | |
2541 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2542 | .mmap = sock_no_mmap, |
2543 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2544 | }; |
2545 | ||
bca65eae | 2546 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2547 | .owner = THIS_MODULE, |
b97bf3fd | 2548 | .family = AF_TIPC, |
c5fa7b3c | 2549 | .create = tipc_sk_create |
b97bf3fd PL |
2550 | }; |
2551 | ||
2552 | static struct proto tipc_proto = { | |
2553 | .name = "TIPC", | |
2554 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2555 | .obj_size = sizeof(struct tipc_sock), |
2556 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2557 | }; |
2558 | ||
2559 | /** | |
4323add6 | 2560 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2561 | * |
b97bf3fd PL |
2562 | * Returns 0 on success, errno otherwise |
2563 | */ | |
4323add6 | 2564 | int tipc_socket_init(void) |
b97bf3fd PL |
2565 | { |
2566 | int res; | |
2567 | ||
c4307285 | 2568 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2569 | if (res) { |
2cf8aa19 | 2570 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2571 | goto out; |
2572 | } | |
2573 | ||
2574 | res = sock_register(&tipc_family_ops); | |
2575 | if (res) { | |
2cf8aa19 | 2576 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2577 | proto_unregister(&tipc_proto); |
2578 | goto out; | |
2579 | } | |
b97bf3fd PL |
2580 | out: |
2581 | return res; | |
2582 | } | |
2583 | ||
2584 | /** | |
4323add6 | 2585 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2586 | */ |
4323add6 | 2587 | void tipc_socket_stop(void) |
b97bf3fd | 2588 | { |
b97bf3fd PL |
2589 | sock_unregister(tipc_family_ops.family); |
2590 | proto_unregister(&tipc_proto); | |
2591 | } | |
34b78a12 RA |
2592 | |
2593 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2594 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2595 | { |
2596 | u32 peer_node; | |
2597 | u32 peer_port; | |
2598 | struct nlattr *nest; | |
2599 | ||
2600 | peer_node = tsk_peer_node(tsk); | |
2601 | peer_port = tsk_peer_port(tsk); | |
2602 | ||
2603 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2604 | ||
2605 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2606 | goto msg_full; | |
2607 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2608 | goto msg_full; | |
2609 | ||
2610 | if (tsk->conn_type != 0) { | |
2611 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2612 | goto msg_full; | |
2613 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2614 | goto msg_full; | |
2615 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2616 | goto msg_full; | |
2617 | } | |
2618 | nla_nest_end(skb, nest); | |
2619 | ||
2620 | return 0; | |
2621 | ||
2622 | msg_full: | |
2623 | nla_nest_cancel(skb, nest); | |
2624 | ||
2625 | return -EMSGSIZE; | |
2626 | } | |
2627 | ||
2628 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2629 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2630 | struct tipc_sock *tsk) | |
34b78a12 RA |
2631 | { |
2632 | int err; | |
2633 | void *hdr; | |
2634 | struct nlattr *attrs; | |
34747539 YX |
2635 | struct net *net = sock_net(skb->sk); |
2636 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
34b78a12 RA |
2637 | |
2638 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2639 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2640 | if (!hdr) |
2641 | goto msg_cancel; | |
2642 | ||
2643 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2644 | if (!attrs) | |
2645 | goto genlmsg_cancel; | |
07f6c4bc | 2646 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2647 | goto attr_msg_cancel; |
34747539 | 2648 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2649 | goto attr_msg_cancel; |
2650 | ||
2651 | if (tsk->connected) { | |
2652 | err = __tipc_nl_add_sk_con(skb, tsk); | |
2653 | if (err) | |
2654 | goto attr_msg_cancel; | |
2655 | } else if (!list_empty(&tsk->publications)) { | |
2656 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2657 | goto attr_msg_cancel; | |
2658 | } | |
2659 | nla_nest_end(skb, attrs); | |
2660 | genlmsg_end(skb, hdr); | |
2661 | ||
2662 | return 0; | |
2663 | ||
2664 | attr_msg_cancel: | |
2665 | nla_nest_cancel(skb, attrs); | |
2666 | genlmsg_cancel: | |
2667 | genlmsg_cancel(skb, hdr); | |
2668 | msg_cancel: | |
2669 | return -EMSGSIZE; | |
2670 | } | |
2671 | ||
2672 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2673 | { | |
2674 | int err; | |
2675 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2676 | const struct bucket_table *tbl; |
2677 | struct rhash_head *pos; | |
e05b31f4 YX |
2678 | struct net *net = sock_net(skb->sk); |
2679 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2680 | u32 tbl_id = cb->args[0]; |
2681 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2682 | |
07f6c4bc | 2683 | rcu_read_lock(); |
e05b31f4 | 2684 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2685 | for (; tbl_id < tbl->size; tbl_id++) { |
2686 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2687 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2688 | if (prev_portid && prev_portid != tsk->portid) { |
2689 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2690 | continue; | |
2691 | } | |
2692 | ||
07f6c4bc | 2693 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2694 | if (err) { |
2695 | prev_portid = tsk->portid; | |
2696 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2697 | goto out; | |
2698 | } | |
2699 | prev_portid = 0; | |
07f6c4bc | 2700 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2701 | } |
34b78a12 | 2702 | } |
d6e164e3 | 2703 | out: |
07f6c4bc | 2704 | rcu_read_unlock(); |
d6e164e3 RA |
2705 | cb->args[0] = tbl_id; |
2706 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2707 | |
2708 | return skb->len; | |
2709 | } | |
1a1a143d RA |
2710 | |
2711 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2712 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2713 | struct netlink_callback *cb, | |
2714 | struct publication *publ) | |
1a1a143d RA |
2715 | { |
2716 | void *hdr; | |
2717 | struct nlattr *attrs; | |
2718 | ||
2719 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2720 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2721 | if (!hdr) |
2722 | goto msg_cancel; | |
2723 | ||
2724 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2725 | if (!attrs) | |
2726 | goto genlmsg_cancel; | |
2727 | ||
2728 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2729 | goto attr_msg_cancel; | |
2730 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2731 | goto attr_msg_cancel; | |
2732 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2733 | goto attr_msg_cancel; | |
2734 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2735 | goto attr_msg_cancel; | |
2736 | ||
2737 | nla_nest_end(skb, attrs); | |
2738 | genlmsg_end(skb, hdr); | |
2739 | ||
2740 | return 0; | |
2741 | ||
2742 | attr_msg_cancel: | |
2743 | nla_nest_cancel(skb, attrs); | |
2744 | genlmsg_cancel: | |
2745 | genlmsg_cancel(skb, hdr); | |
2746 | msg_cancel: | |
2747 | return -EMSGSIZE; | |
2748 | } | |
2749 | ||
2750 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2751 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2752 | struct netlink_callback *cb, | |
2753 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2754 | { |
2755 | int err; | |
2756 | struct publication *p; | |
2757 | ||
2758 | if (*last_publ) { | |
2759 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2760 | if (p->key == *last_publ) | |
2761 | break; | |
2762 | } | |
2763 | if (p->key != *last_publ) { | |
2764 | /* We never set seq or call nl_dump_check_consistent() | |
2765 | * this means that setting prev_seq here will cause the | |
2766 | * consistence check to fail in the netlink callback | |
2767 | * handler. Resulting in the last NLMSG_DONE message | |
2768 | * having the NLM_F_DUMP_INTR flag set. | |
2769 | */ | |
2770 | cb->prev_seq = 1; | |
2771 | *last_publ = 0; | |
2772 | return -EPIPE; | |
2773 | } | |
2774 | } else { | |
2775 | p = list_first_entry(&tsk->publications, struct publication, | |
2776 | pport_list); | |
2777 | } | |
2778 | ||
2779 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2780 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2781 | if (err) { | |
2782 | *last_publ = p->key; | |
2783 | return err; | |
2784 | } | |
2785 | } | |
2786 | *last_publ = 0; | |
2787 | ||
2788 | return 0; | |
2789 | } | |
2790 | ||
2791 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2792 | { | |
2793 | int err; | |
07f6c4bc | 2794 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2795 | u32 last_publ = cb->args[1]; |
2796 | u32 done = cb->args[2]; | |
e05b31f4 | 2797 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2798 | struct tipc_sock *tsk; |
2799 | ||
07f6c4bc | 2800 | if (!tsk_portid) { |
1a1a143d RA |
2801 | struct nlattr **attrs; |
2802 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2803 | ||
2804 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2805 | if (err) | |
2806 | return err; | |
2807 | ||
2808 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, | |
2809 | attrs[TIPC_NLA_SOCK], | |
2810 | tipc_nl_sock_policy); | |
2811 | if (err) | |
2812 | return err; | |
2813 | ||
2814 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2815 | return -EINVAL; | |
2816 | ||
07f6c4bc | 2817 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2818 | } |
2819 | ||
2820 | if (done) | |
2821 | return 0; | |
2822 | ||
e05b31f4 | 2823 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2824 | if (!tsk) |
2825 | return -EINVAL; | |
2826 | ||
2827 | lock_sock(&tsk->sk); | |
2828 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2829 | if (!err) | |
2830 | done = 1; | |
2831 | release_sock(&tsk->sk); | |
07f6c4bc | 2832 | sock_put(&tsk->sk); |
1a1a143d | 2833 | |
07f6c4bc | 2834 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2835 | cb->args[1] = last_publ; |
2836 | cb->args[2] = done; | |
2837 | ||
2838 | return skb->len; | |
2839 | } |