Commit | Line | Data |
---|---|---|
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); |
f4195d1e | 108 | static void tipc_sock_destruct(struct sock *sk); |
247f0f3c YX |
109 | static int tipc_release(struct socket *sock); |
110 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 111 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
f2f2a96a | 112 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 113 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 114 | struct tipc_name_seq const *seq); |
301bae56 | 115 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 116 | struct tipc_name_seq const *seq); |
e05b31f4 | 117 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
118 | static int tipc_sk_insert(struct tipc_sock *tsk); |
119 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
39a0295f YX |
120 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, |
121 | size_t dsz); | |
122 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); | |
b97bf3fd | 123 | |
bca65eae FW |
124 | static const struct proto_ops packet_ops; |
125 | static const struct proto_ops stream_ops; | |
126 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
127 | static struct proto tipc_proto; |
128 | ||
1a1a143d RA |
129 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
130 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, | |
131 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, | |
132 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, | |
133 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, | |
134 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } | |
135 | }; | |
136 | ||
6cca7289 HX |
137 | static const struct rhashtable_params tsk_rht_params; |
138 | ||
c4307285 | 139 | /* |
0c3141e9 AS |
140 | * Revised TIPC socket locking policy: |
141 | * | |
142 | * Most socket operations take the standard socket lock when they start | |
143 | * and hold it until they finish (or until they need to sleep). Acquiring | |
144 | * this lock grants the owner exclusive access to the fields of the socket | |
145 | * data structures, with the exception of the backlog queue. A few socket | |
146 | * operations can be done without taking the socket lock because they only | |
147 | * read socket information that never changes during the life of the socket. | |
148 | * | |
149 | * Socket operations may acquire the lock for the associated TIPC port if they | |
150 | * need to perform an operation on the port. If any routine needs to acquire | |
151 | * both the socket lock and the port lock it must take the socket lock first | |
152 | * to avoid the risk of deadlock. | |
153 | * | |
154 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
155 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
156 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
157 | * and either handles the message itself or adds it to the socket's backlog | |
158 | * queue; in the latter case the queued message is processed once the process | |
159 | * owning the socket lock releases it. | |
160 | * | |
161 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
162 | * the problem of a blocked socket operation preventing any other operations | |
163 | * from occurring. However, applications must be careful if they have | |
164 | * multiple threads trying to send (or receive) on the same socket, as these | |
165 | * operations might interfere with each other. For example, doing a connect | |
166 | * and a receive at the same time might allow the receive to consume the | |
167 | * ACK message meant for the connect. While additional work could be done | |
168 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
169 | * | |
170 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
171 | * that another operation that must be performed in a non-blocking manner is | |
172 | * not delayed for very long because the lock has already been taken. | |
173 | * | |
174 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
175 | * constant over its lifetime; such fields can be examined without taking | |
176 | * the socket lock and/or port lock, and do not need to be re-read even | |
177 | * after resuming processing after waiting. These fields include: | |
178 | * - socket type | |
179 | * - pointer to socket sk structure (aka tipc_sock structure) | |
180 | * - pointer to port structure | |
181 | * - port reference | |
182 | */ | |
183 | ||
c5898636 JPM |
184 | static u32 tsk_own_node(struct tipc_sock *tsk) |
185 | { | |
186 | return msg_prevnode(&tsk->phdr); | |
187 | } | |
188 | ||
301bae56 | 189 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 190 | { |
301bae56 | 191 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
192 | } |
193 | ||
301bae56 | 194 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 195 | { |
301bae56 | 196 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
197 | } |
198 | ||
301bae56 | 199 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 200 | { |
301bae56 | 201 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
202 | } |
203 | ||
301bae56 | 204 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 205 | { |
301bae56 | 206 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
207 | } |
208 | ||
301bae56 | 209 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 210 | { |
301bae56 | 211 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
212 | } |
213 | ||
301bae56 | 214 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 215 | { |
301bae56 | 216 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
217 | } |
218 | ||
301bae56 | 219 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 220 | { |
301bae56 | 221 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
222 | } |
223 | ||
301bae56 | 224 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
225 | { |
226 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
227 | return -EINVAL; | |
301bae56 | 228 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
229 | return 0; |
230 | } | |
8826cde6 | 231 | |
301bae56 JPM |
232 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
233 | { | |
234 | return container_of(sk, struct tipc_sock, sk); | |
235 | } | |
236 | ||
237 | static int tsk_conn_cong(struct tipc_sock *tsk) | |
238 | { | |
239 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; | |
240 | } | |
241 | ||
0c3141e9 | 242 | /** |
2e84c60b | 243 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
244 | * |
245 | * Caller must hold socket lock | |
b97bf3fd | 246 | */ |
2e84c60b | 247 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 248 | { |
5f6d9123 | 249 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
250 | } |
251 | ||
bcd3ffd4 JPM |
252 | /* tipc_sk_respond() : send response message back to sender |
253 | */ | |
254 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) | |
255 | { | |
256 | u32 selector; | |
257 | u32 dnode; | |
258 | u32 onode = tipc_own_addr(sock_net(sk)); | |
259 | ||
260 | if (!tipc_msg_reverse(onode, &skb, err)) | |
261 | return; | |
262 | ||
263 | dnode = msg_destnode(buf_msg(skb)); | |
264 | selector = msg_origport(buf_msg(skb)); | |
265 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); | |
266 | } | |
267 | ||
b97bf3fd | 268 | /** |
2e84c60b | 269 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
270 | * |
271 | * Caller must hold socket lock | |
b97bf3fd | 272 | */ |
2e84c60b | 273 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 274 | { |
a6ca1094 | 275 | struct sk_buff *skb; |
0c3141e9 | 276 | |
bcd3ffd4 JPM |
277 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
278 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); | |
b97bf3fd PL |
279 | } |
280 | ||
2e84c60b | 281 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
282 | * |
283 | * Handles cases where the node's network address has changed from | |
284 | * the default of <0.0.0> to its configured setting. | |
285 | */ | |
2e84c60b | 286 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 287 | { |
34747539 | 288 | struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id); |
301bae56 | 289 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
290 | u32 orig_node; |
291 | u32 peer_node; | |
292 | ||
301bae56 | 293 | if (unlikely(!tsk->connected)) |
0fc87aae JPM |
294 | return false; |
295 | ||
296 | if (unlikely(msg_origport(msg) != peer_port)) | |
297 | return false; | |
298 | ||
299 | orig_node = msg_orignode(msg); | |
301bae56 | 300 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
301 | |
302 | if (likely(orig_node == peer_node)) | |
303 | return true; | |
304 | ||
34747539 | 305 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
306 | return true; |
307 | ||
34747539 | 308 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
309 | return true; |
310 | ||
311 | return false; | |
312 | } | |
313 | ||
b97bf3fd | 314 | /** |
c5fa7b3c | 315 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 316 | * @net: network namespace (must be default network) |
b97bf3fd PL |
317 | * @sock: pre-allocated socket structure |
318 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 319 | * @kern: caused by kernel or by userspace? |
c4307285 | 320 | * |
0c3141e9 AS |
321 | * This routine creates additional data structures used by the TIPC socket, |
322 | * initializes them, and links them together. | |
b97bf3fd PL |
323 | * |
324 | * Returns 0 on success, errno otherwise | |
325 | */ | |
58ed9442 JPM |
326 | static int tipc_sk_create(struct net *net, struct socket *sock, |
327 | int protocol, int kern) | |
b97bf3fd | 328 | { |
c5898636 | 329 | struct tipc_net *tn; |
0c3141e9 AS |
330 | const struct proto_ops *ops; |
331 | socket_state state; | |
b97bf3fd | 332 | struct sock *sk; |
58ed9442 | 333 | struct tipc_sock *tsk; |
5b8fa7ce | 334 | struct tipc_msg *msg; |
0c3141e9 AS |
335 | |
336 | /* Validate arguments */ | |
b97bf3fd PL |
337 | if (unlikely(protocol != 0)) |
338 | return -EPROTONOSUPPORT; | |
339 | ||
b97bf3fd PL |
340 | switch (sock->type) { |
341 | case SOCK_STREAM: | |
0c3141e9 AS |
342 | ops = &stream_ops; |
343 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
344 | break; |
345 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
346 | ops = &packet_ops; |
347 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
348 | break; |
349 | case SOCK_DGRAM: | |
b97bf3fd | 350 | case SOCK_RDM: |
0c3141e9 AS |
351 | ops = &msg_ops; |
352 | state = SS_READY; | |
b97bf3fd | 353 | break; |
49978651 | 354 | default: |
49978651 | 355 | return -EPROTOTYPE; |
b97bf3fd PL |
356 | } |
357 | ||
0c3141e9 | 358 | /* Allocate socket's protocol area */ |
11aa9c28 | 359 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 360 | if (sk == NULL) |
b97bf3fd | 361 | return -ENOMEM; |
b97bf3fd | 362 | |
58ed9442 | 363 | tsk = tipc_sk(sk); |
301bae56 | 364 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
365 | INIT_LIST_HEAD(&tsk->publications); |
366 | msg = &tsk->phdr; | |
c5898636 JPM |
367 | tn = net_generic(sock_net(sk), tipc_net_id); |
368 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 369 | NAMED_H_SIZE, 0); |
b97bf3fd | 370 | |
0c3141e9 | 371 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
372 | sock->ops = ops; |
373 | sock->state = state; | |
0c3141e9 | 374 | sock_init_data(sock, sk); |
07f6c4bc YX |
375 | if (tipc_sk_insert(tsk)) { |
376 | pr_warn("Socket create failed; port numbrer exhausted\n"); | |
377 | return -EINVAL; | |
378 | } | |
379 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 380 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
4f4482dc | 381 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 382 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
383 | sk->sk_data_ready = tipc_data_ready; |
384 | sk->sk_write_space = tipc_write_space; | |
f4195d1e | 385 | sk->sk_destruct = tipc_sock_destruct; |
4f4482dc | 386 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 387 | tsk->sent_unacked = 0; |
4f4482dc | 388 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 389 | |
0c3141e9 | 390 | if (sock->state == SS_READY) { |
301bae56 | 391 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 392 | if (sock->type == SOCK_DGRAM) |
301bae56 | 393 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 394 | } |
b97bf3fd PL |
395 | return 0; |
396 | } | |
397 | ||
07f6c4bc YX |
398 | static void tipc_sk_callback(struct rcu_head *head) |
399 | { | |
400 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
401 | ||
402 | sock_put(&tsk->sk); | |
403 | } | |
404 | ||
b97bf3fd | 405 | /** |
247f0f3c | 406 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
407 | * @sock: socket to destroy |
408 | * | |
409 | * This routine cleans up any messages that are still queued on the socket. | |
410 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
411 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
412 | * and any others are discarded. (If the first message on a STREAM socket | |
413 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 414 | * |
b97bf3fd PL |
415 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
416 | * are returned or discarded according to the "destination droppable" setting | |
417 | * specified for the message by the sender. | |
418 | * | |
419 | * Returns 0 on success, errno otherwise | |
420 | */ | |
247f0f3c | 421 | static int tipc_release(struct socket *sock) |
b97bf3fd | 422 | { |
b97bf3fd | 423 | struct sock *sk = sock->sk; |
357c4774 | 424 | struct net *net; |
58ed9442 | 425 | struct tipc_sock *tsk; |
a6ca1094 | 426 | struct sk_buff *skb; |
1ea23a21 | 427 | u32 dnode; |
b97bf3fd | 428 | |
0c3141e9 AS |
429 | /* |
430 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
431 | * releases a pre-allocated child socket that was never used) | |
432 | */ | |
0c3141e9 | 433 | if (sk == NULL) |
b97bf3fd | 434 | return 0; |
c4307285 | 435 | |
357c4774 | 436 | net = sock_net(sk); |
58ed9442 | 437 | tsk = tipc_sk(sk); |
0c3141e9 AS |
438 | lock_sock(sk); |
439 | ||
440 | /* | |
441 | * Reject all unreceived messages, except on an active connection | |
442 | * (which disconnects locally & sends a 'FIN+' to peer) | |
443 | */ | |
301bae56 | 444 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 445 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
446 | skb = __skb_dequeue(&sk->sk_receive_queue); |
447 | if (skb == NULL) | |
b97bf3fd | 448 | break; |
a6ca1094 YX |
449 | if (TIPC_SKB_CB(skb)->handle != NULL) |
450 | kfree_skb(skb); | |
0c3141e9 AS |
451 | else { |
452 | if ((sock->state == SS_CONNECTING) || | |
453 | (sock->state == SS_CONNECTED)) { | |
454 | sock->state = SS_DISCONNECTING; | |
301bae56 | 455 | tsk->connected = 0; |
f2f9800d | 456 | tipc_node_remove_conn(net, dnode, tsk->portid); |
0c3141e9 | 457 | } |
bcd3ffd4 | 458 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); |
0c3141e9 | 459 | } |
b97bf3fd PL |
460 | } |
461 | ||
301bae56 | 462 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 463 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 464 | tipc_sk_remove(tsk); |
301bae56 | 465 | if (tsk->connected) { |
c5898636 | 466 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 467 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
c5898636 | 468 | tsk_own_node(tsk), tsk_peer_port(tsk), |
07f6c4bc | 469 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 470 | if (skb) |
af9b028e | 471 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); |
f2f9800d | 472 | tipc_node_remove_conn(net, dnode, tsk->portid); |
5b8fa7ce | 473 | } |
b97bf3fd | 474 | |
0c3141e9 | 475 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
476 | sock->state = SS_DISCONNECTING; |
477 | release_sock(sk); | |
07f6c4bc YX |
478 | |
479 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 480 | sock->sk = NULL; |
b97bf3fd | 481 | |
065d7e39 | 482 | return 0; |
b97bf3fd PL |
483 | } |
484 | ||
485 | /** | |
247f0f3c | 486 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
487 | * @sock: socket structure |
488 | * @uaddr: socket address describing name(s) and desired operation | |
489 | * @uaddr_len: size of socket address data structure | |
c4307285 | 490 | * |
b97bf3fd PL |
491 | * Name and name sequence binding is indicated using a positive scope value; |
492 | * a negative scope value unbinds the specified name. Specifying no name | |
493 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 494 | * |
b97bf3fd | 495 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
496 | * |
497 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
498 | * access any non-constant socket information. | |
b97bf3fd | 499 | */ |
247f0f3c YX |
500 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
501 | int uaddr_len) | |
b97bf3fd | 502 | { |
84602761 | 503 | struct sock *sk = sock->sk; |
b97bf3fd | 504 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 505 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 506 | int res = -EINVAL; |
b97bf3fd | 507 | |
84602761 YX |
508 | lock_sock(sk); |
509 | if (unlikely(!uaddr_len)) { | |
301bae56 | 510 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
511 | goto exit; |
512 | } | |
c4307285 | 513 | |
84602761 YX |
514 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
515 | res = -EINVAL; | |
516 | goto exit; | |
517 | } | |
518 | if (addr->family != AF_TIPC) { | |
519 | res = -EAFNOSUPPORT; | |
520 | goto exit; | |
521 | } | |
b97bf3fd | 522 | |
b97bf3fd PL |
523 | if (addr->addrtype == TIPC_ADDR_NAME) |
524 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
525 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
526 | res = -EAFNOSUPPORT; | |
527 | goto exit; | |
528 | } | |
c4307285 | 529 | |
13a2e898 | 530 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 531 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
532 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
533 | res = -EACCES; | |
534 | goto exit; | |
535 | } | |
c422f1bd | 536 | |
84602761 | 537 | res = (addr->scope > 0) ? |
301bae56 JPM |
538 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
539 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
540 | exit: |
541 | release_sock(sk); | |
542 | return res; | |
b97bf3fd PL |
543 | } |
544 | ||
c4307285 | 545 | /** |
247f0f3c | 546 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
547 | * @sock: socket structure |
548 | * @uaddr: area for returned socket address | |
549 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 550 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 551 | * |
b97bf3fd | 552 | * Returns 0 on success, errno otherwise |
0c3141e9 | 553 | * |
2da59918 AS |
554 | * NOTE: This routine doesn't need to take the socket lock since it only |
555 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 556 | * a completely predictable manner). |
b97bf3fd | 557 | */ |
247f0f3c YX |
558 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
559 | int *uaddr_len, int peer) | |
b97bf3fd | 560 | { |
b97bf3fd | 561 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 562 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
34747539 | 563 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 564 | |
88f8a5e3 | 565 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 566 | if (peer) { |
2da59918 AS |
567 | if ((sock->state != SS_CONNECTED) && |
568 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
569 | return -ENOTCONN; | |
301bae56 JPM |
570 | addr->addr.id.ref = tsk_peer_port(tsk); |
571 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 572 | } else { |
07f6c4bc | 573 | addr->addr.id.ref = tsk->portid; |
34747539 | 574 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 575 | } |
b97bf3fd PL |
576 | |
577 | *uaddr_len = sizeof(*addr); | |
578 | addr->addrtype = TIPC_ADDR_ID; | |
579 | addr->family = AF_TIPC; | |
580 | addr->scope = 0; | |
b97bf3fd PL |
581 | addr->addr.name.domain = 0; |
582 | ||
0c3141e9 | 583 | return 0; |
b97bf3fd PL |
584 | } |
585 | ||
586 | /** | |
247f0f3c | 587 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
588 | * @file: file structure associated with the socket |
589 | * @sock: socket for which to calculate the poll bits | |
590 | * @wait: ??? | |
591 | * | |
9b674e82 AS |
592 | * Returns pollmask value |
593 | * | |
594 | * COMMENTARY: | |
595 | * It appears that the usual socket locking mechanisms are not useful here | |
596 | * since the pollmask info is potentially out-of-date the moment this routine | |
597 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
598 | * to handle any preventable race conditions, so TIPC will do the same ... | |
599 | * | |
600 | * TIPC sets the returned events as follows: | |
f662c070 AS |
601 | * |
602 | * socket state flags set | |
603 | * ------------ --------- | |
604 | * unconnected no read flags | |
c4fc298a | 605 | * POLLOUT if port is not congested |
f662c070 AS |
606 | * |
607 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
608 | * no write flags | |
609 | * | |
610 | * connected POLLIN/POLLRDNORM if data in rx queue | |
611 | * POLLOUT if port is not congested | |
612 | * | |
613 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
614 | * no write flags | |
615 | * | |
616 | * listening POLLIN if SYN in rx queue | |
617 | * no write flags | |
618 | * | |
619 | * ready POLLIN/POLLRDNORM if data in rx queue | |
620 | * [connectionless] POLLOUT (since port cannot be congested) | |
621 | * | |
622 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
623 | * imply that the operation will succeed, merely that it should be performed | |
624 | * and will not block. | |
b97bf3fd | 625 | */ |
247f0f3c YX |
626 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
627 | poll_table *wait) | |
b97bf3fd | 628 | { |
9b674e82 | 629 | struct sock *sk = sock->sk; |
58ed9442 | 630 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 631 | u32 mask = 0; |
9b674e82 | 632 | |
f288bef4 | 633 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 634 | |
f662c070 | 635 | switch ((int)sock->state) { |
c4fc298a | 636 | case SS_UNCONNECTED: |
60120526 | 637 | if (!tsk->link_cong) |
c4fc298a EH |
638 | mask |= POLLOUT; |
639 | break; | |
f662c070 AS |
640 | case SS_READY: |
641 | case SS_CONNECTED: | |
301bae56 | 642 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
643 | mask |= POLLOUT; |
644 | /* fall thru' */ | |
645 | case SS_CONNECTING: | |
646 | case SS_LISTENING: | |
647 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
648 | mask |= (POLLIN | POLLRDNORM); | |
649 | break; | |
650 | case SS_DISCONNECTING: | |
651 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
652 | break; | |
653 | } | |
9b674e82 AS |
654 | |
655 | return mask; | |
b97bf3fd PL |
656 | } |
657 | ||
0abd8ff2 JPM |
658 | /** |
659 | * tipc_sendmcast - send multicast message | |
660 | * @sock: socket structure | |
661 | * @seq: destination address | |
562640f3 | 662 | * @msg: message to send |
0abd8ff2 JPM |
663 | * @dsz: total length of message data |
664 | * @timeo: timeout to wait for wakeup | |
665 | * | |
666 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
667 | * Returns the number of bytes sent on success, or errno | |
668 | */ | |
669 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 670 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
671 | { |
672 | struct sock *sk = sock->sk; | |
c5898636 | 673 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 674 | struct net *net = sock_net(sk); |
c5898636 | 675 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 676 | struct sk_buff_head pktchain; |
f25dcc76 | 677 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
678 | uint mtu; |
679 | int rc; | |
680 | ||
681 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
682 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
683 | msg_set_destport(mhdr, 0); | |
684 | msg_set_destnode(mhdr, 0); | |
685 | msg_set_nametype(mhdr, seq->type); | |
686 | msg_set_namelower(mhdr, seq->lower); | |
687 | msg_set_nameupper(mhdr, seq->upper); | |
688 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
689 | ||
f214fc40 PB |
690 | skb_queue_head_init(&pktchain); |
691 | ||
0abd8ff2 | 692 | new_mtu: |
959e1781 | 693 | mtu = tipc_bcast_get_mtu(net); |
f214fc40 | 694 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &pktchain); |
0abd8ff2 JPM |
695 | if (unlikely(rc < 0)) |
696 | return rc; | |
697 | ||
698 | do { | |
f214fc40 | 699 | rc = tipc_bcast_xmit(net, &pktchain); |
22d85c79 JPM |
700 | if (likely(!rc)) |
701 | return dsz; | |
702 | ||
703 | if (rc == -ELINKCONG) { | |
704 | tsk->link_cong = 1; | |
705 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
706 | if (!rc) | |
707 | continue; | |
0abd8ff2 | 708 | } |
f214fc40 | 709 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
710 | if (rc == -EMSGSIZE) { |
711 | msg->msg_iter = save; | |
0abd8ff2 | 712 | goto new_mtu; |
f25dcc76 | 713 | } |
22d85c79 JPM |
714 | break; |
715 | } while (1); | |
0abd8ff2 JPM |
716 | return rc; |
717 | } | |
718 | ||
cb1b7280 JPM |
719 | /** |
720 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
721 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
722 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
723 | * | |
724 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 725 | */ |
cb1b7280 JPM |
726 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
727 | struct sk_buff_head *inputq) | |
078bec82 | 728 | { |
cb1b7280 | 729 | struct tipc_msg *msg; |
3c724acd | 730 | struct tipc_plist dports; |
3c724acd | 731 | u32 portid; |
078bec82 | 732 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
733 | struct sk_buff_head tmpq; |
734 | uint hsz; | |
735 | struct sk_buff *skb, *_skb; | |
3c724acd | 736 | |
cb1b7280 | 737 | __skb_queue_head_init(&tmpq); |
3c724acd | 738 | tipc_plist_init(&dports); |
078bec82 | 739 | |
cb1b7280 JPM |
740 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
741 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
742 | msg = buf_msg(skb); | |
743 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
744 | ||
745 | if (in_own_node(net, msg_orignode(msg))) | |
746 | scope = TIPC_NODE_SCOPE; | |
747 | ||
748 | /* Create destination port list and message clones: */ | |
749 | tipc_nametbl_mc_translate(net, | |
750 | msg_nametype(msg), msg_namelower(msg), | |
751 | msg_nameupper(msg), scope, &dports); | |
752 | portid = tipc_plist_pop(&dports); | |
753 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
754 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
755 | if (_skb) { | |
756 | msg_set_destport(buf_msg(_skb), portid); | |
757 | __skb_queue_tail(&tmpq, _skb); | |
758 | continue; | |
759 | } | |
760 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 761 | } |
cb1b7280 JPM |
762 | /* Append to inputq if not already done by other thread */ |
763 | spin_lock_bh(&inputq->lock); | |
764 | if (skb_peek(arrvq) == skb) { | |
765 | skb_queue_splice_tail_init(&tmpq, inputq); | |
766 | kfree_skb(__skb_dequeue(arrvq)); | |
767 | } | |
768 | spin_unlock_bh(&inputq->lock); | |
769 | __skb_queue_purge(&tmpq); | |
770 | kfree_skb(skb); | |
078bec82 | 771 | } |
cb1b7280 | 772 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
773 | } |
774 | ||
ac0074ee JPM |
775 | /** |
776 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
777 | * @tsk: receiving socket | |
bcd3ffd4 | 778 | * @skb: pointer to message buffer. |
ac0074ee | 779 | */ |
bcd3ffd4 | 780 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb) |
ac0074ee | 781 | { |
bcd3ffd4 JPM |
782 | struct sock *sk = &tsk->sk; |
783 | struct tipc_msg *hdr = buf_msg(skb); | |
784 | int mtyp = msg_type(hdr); | |
60120526 | 785 | int conn_cong; |
bcd3ffd4 | 786 | |
ac0074ee | 787 | /* Ignore if connection cannot be validated: */ |
bcd3ffd4 | 788 | if (!tsk_peer_msg(tsk, hdr)) |
ac0074ee JPM |
789 | goto exit; |
790 | ||
301bae56 | 791 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee | 792 | |
bcd3ffd4 JPM |
793 | if (mtyp == CONN_PROBE) { |
794 | msg_set_type(hdr, CONN_PROBE_REPLY); | |
795 | tipc_sk_respond(sk, skb, TIPC_OK); | |
796 | return; | |
797 | } else if (mtyp == CONN_ACK) { | |
301bae56 | 798 | conn_cong = tsk_conn_cong(tsk); |
bcd3ffd4 | 799 | tsk->sent_unacked -= msg_msgcnt(hdr); |
60120526 | 800 | if (conn_cong) |
bcd3ffd4 JPM |
801 | sk->sk_write_space(sk); |
802 | } else if (mtyp != CONN_PROBE_REPLY) { | |
803 | pr_warn("Received unknown CONN_PROTO msg\n"); | |
ac0074ee | 804 | } |
ac0074ee | 805 | exit: |
bcd3ffd4 | 806 | kfree_skb(skb); |
ac0074ee JPM |
807 | } |
808 | ||
3f40504f YX |
809 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
810 | { | |
811 | struct sock *sk = sock->sk; | |
58ed9442 | 812 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
813 | DEFINE_WAIT(wait); |
814 | int done; | |
815 | ||
816 | do { | |
817 | int err = sock_error(sk); | |
818 | if (err) | |
819 | return err; | |
820 | if (sock->state == SS_DISCONNECTING) | |
821 | return -EPIPE; | |
822 | if (!*timeo_p) | |
823 | return -EAGAIN; | |
824 | if (signal_pending(current)) | |
825 | return sock_intr_errno(*timeo_p); | |
826 | ||
827 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 828 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
829 | finish_wait(sk_sleep(sk), &wait); |
830 | } while (!done); | |
831 | return 0; | |
832 | } | |
833 | ||
b97bf3fd | 834 | /** |
247f0f3c | 835 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
836 | * @sock: socket structure |
837 | * @m: message to send | |
e2dafe87 | 838 | * @dsz: amount of user data to be sent |
c4307285 | 839 | * |
b97bf3fd | 840 | * Message must have an destination specified explicitly. |
c4307285 | 841 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
842 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
843 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 844 | * |
b97bf3fd PL |
845 | * Returns the number of bytes sent on success, or errno otherwise |
846 | */ | |
1b784140 | 847 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 848 | struct msghdr *m, size_t dsz) |
39a0295f YX |
849 | { |
850 | struct sock *sk = sock->sk; | |
851 | int ret; | |
852 | ||
853 | lock_sock(sk); | |
854 | ret = __tipc_sendmsg(sock, m, dsz); | |
855 | release_sock(sk); | |
856 | ||
857 | return ret; | |
858 | } | |
859 | ||
860 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 861 | { |
e2dafe87 | 862 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 863 | struct sock *sk = sock->sk; |
58ed9442 | 864 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 865 | struct net *net = sock_net(sk); |
301bae56 | 866 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 867 | u32 dnode, dport; |
f214fc40 | 868 | struct sk_buff_head pktchain; |
a6ca1094 | 869 | struct sk_buff *skb; |
f2f8036e | 870 | struct tipc_name_seq *seq; |
f25dcc76 | 871 | struct iov_iter save; |
e2dafe87 | 872 | u32 mtu; |
3f40504f | 873 | long timeo; |
88b17b6a | 874 | int rc; |
b97bf3fd | 875 | |
e2dafe87 | 876 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 877 | return -EMSGSIZE; |
f2f8036e EH |
878 | if (unlikely(!dest)) { |
879 | if (tsk->connected && sock->state == SS_READY) | |
880 | dest = &tsk->remote; | |
881 | else | |
882 | return -EDESTADDRREQ; | |
883 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || | |
884 | dest->family != AF_TIPC) { | |
885 | return -EINVAL; | |
886 | } | |
e2dafe87 | 887 | if (unlikely(sock->state != SS_READY)) { |
39a0295f YX |
888 | if (sock->state == SS_LISTENING) |
889 | return -EPIPE; | |
890 | if (sock->state != SS_UNCONNECTED) | |
891 | return -EISCONN; | |
892 | if (tsk->published) | |
893 | return -EOPNOTSUPP; | |
3388007b | 894 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
895 | tsk->conn_type = dest->addr.name.name.type; |
896 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 897 | } |
b97bf3fd | 898 | } |
f2f8036e | 899 | seq = &dest->addr.nameseq; |
3f40504f | 900 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
901 | |
902 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 903 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
904 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
905 | u32 type = dest->addr.name.name.type; | |
906 | u32 inst = dest->addr.name.name.instance; | |
907 | u32 domain = dest->addr.name.domain; | |
908 | ||
909 | dnode = domain; | |
910 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
911 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
912 | msg_set_nametype(mhdr, type); | |
913 | msg_set_nameinst(mhdr, inst); | |
914 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 915 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
916 | msg_set_destnode(mhdr, dnode); |
917 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
918 | if (unlikely(!dport && !dnode)) |
919 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
920 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
921 | dnode = dest->addr.id.node; | |
922 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
923 | msg_set_lookup_scope(mhdr, 0); | |
924 | msg_set_destnode(mhdr, dnode); | |
925 | msg_set_destport(mhdr, dest->addr.id.ref); | |
926 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
927 | } | |
928 | ||
f214fc40 | 929 | skb_queue_head_init(&pktchain); |
f25dcc76 | 930 | save = m->msg_iter; |
e2dafe87 | 931 | new_mtu: |
f2f9800d | 932 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
f214fc40 | 933 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &pktchain); |
e2dafe87 | 934 | if (rc < 0) |
39a0295f | 935 | return rc; |
e2dafe87 JPM |
936 | |
937 | do { | |
f214fc40 | 938 | skb = skb_peek(&pktchain); |
a6ca1094 | 939 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
f214fc40 | 940 | rc = tipc_node_xmit(net, &pktchain, dnode, tsk->portid); |
22d85c79 | 941 | if (likely(!rc)) { |
e2dafe87 | 942 | if (sock->state != SS_READY) |
0c3141e9 | 943 | sock->state = SS_CONNECTING; |
22d85c79 | 944 | return dsz; |
c4307285 | 945 | } |
22d85c79 JPM |
946 | if (rc == -ELINKCONG) { |
947 | tsk->link_cong = 1; | |
948 | rc = tipc_wait_for_sndmsg(sock, &timeo); | |
949 | if (!rc) | |
950 | continue; | |
951 | } | |
f214fc40 | 952 | __skb_queue_purge(&pktchain); |
f25dcc76 AV |
953 | if (rc == -EMSGSIZE) { |
954 | m->msg_iter = save; | |
e2dafe87 | 955 | goto new_mtu; |
f25dcc76 | 956 | } |
22d85c79 JPM |
957 | break; |
958 | } while (1); | |
e2dafe87 JPM |
959 | |
960 | return rc; | |
b97bf3fd PL |
961 | } |
962 | ||
391a6dd1 YX |
963 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
964 | { | |
965 | struct sock *sk = sock->sk; | |
58ed9442 | 966 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
967 | DEFINE_WAIT(wait); |
968 | int done; | |
969 | ||
970 | do { | |
971 | int err = sock_error(sk); | |
972 | if (err) | |
973 | return err; | |
974 | if (sock->state == SS_DISCONNECTING) | |
975 | return -EPIPE; | |
976 | else if (sock->state != SS_CONNECTED) | |
977 | return -ENOTCONN; | |
978 | if (!*timeo_p) | |
979 | return -EAGAIN; | |
980 | if (signal_pending(current)) | |
981 | return sock_intr_errno(*timeo_p); | |
982 | ||
983 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
984 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 985 | (!tsk->link_cong && |
301bae56 JPM |
986 | !tsk_conn_cong(tsk)) || |
987 | !tsk->connected); | |
391a6dd1 YX |
988 | finish_wait(sk_sleep(sk), &wait); |
989 | } while (!done); | |
990 | return 0; | |
991 | } | |
992 | ||
c4307285 | 993 | /** |
4ccfe5e0 | 994 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 995 | * @sock: socket structure |
4ccfe5e0 JPM |
996 | * @m: data to send |
997 | * @dsz: total length of data to be transmitted | |
c4307285 | 998 | * |
4ccfe5e0 | 999 | * Used for SOCK_STREAM data. |
c4307285 | 1000 | * |
4ccfe5e0 JPM |
1001 | * Returns the number of bytes sent on success (or partial success), |
1002 | * or errno if no data sent | |
b97bf3fd | 1003 | */ |
1b784140 | 1004 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
1005 | { |
1006 | struct sock *sk = sock->sk; | |
1007 | int ret; | |
1008 | ||
1009 | lock_sock(sk); | |
1010 | ret = __tipc_send_stream(sock, m, dsz); | |
1011 | release_sock(sk); | |
1012 | ||
1013 | return ret; | |
1014 | } | |
1015 | ||
1016 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1017 | { |
0c3141e9 | 1018 | struct sock *sk = sock->sk; |
f2f9800d | 1019 | struct net *net = sock_net(sk); |
58ed9442 | 1020 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1021 | struct tipc_msg *mhdr = &tsk->phdr; |
f214fc40 | 1022 | struct sk_buff_head pktchain; |
342dfc30 | 1023 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1024 | u32 portid = tsk->portid; |
4ccfe5e0 | 1025 | int rc = -EINVAL; |
391a6dd1 | 1026 | long timeo; |
4ccfe5e0 JPM |
1027 | u32 dnode; |
1028 | uint mtu, send, sent = 0; | |
f25dcc76 | 1029 | struct iov_iter save; |
b97bf3fd PL |
1030 | |
1031 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1032 | if (unlikely(dest)) { |
39a0295f | 1033 | rc = __tipc_sendmsg(sock, m, dsz); |
4ccfe5e0 | 1034 | if (dsz && (dsz == rc)) |
60120526 | 1035 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
1036 | return rc; |
1037 | } | |
1038 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1039 | return -EMSGSIZE; |
1040 | ||
391a6dd1 YX |
1041 | if (unlikely(sock->state != SS_CONNECTED)) { |
1042 | if (sock->state == SS_DISCONNECTING) | |
39a0295f | 1043 | return -EPIPE; |
391a6dd1 | 1044 | else |
39a0295f | 1045 | return -ENOTCONN; |
391a6dd1 | 1046 | } |
1d835874 | 1047 | |
391a6dd1 | 1048 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
301bae56 | 1049 | dnode = tsk_peer_node(tsk); |
f214fc40 | 1050 | skb_queue_head_init(&pktchain); |
4ccfe5e0 JPM |
1051 | |
1052 | next: | |
f25dcc76 | 1053 | save = m->msg_iter; |
301bae56 | 1054 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1055 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
f214fc40 | 1056 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, &pktchain); |
4ccfe5e0 | 1057 | if (unlikely(rc < 0)) |
39a0295f | 1058 | return rc; |
f214fc40 | 1059 | |
c4307285 | 1060 | do { |
301bae56 | 1061 | if (likely(!tsk_conn_cong(tsk))) { |
f214fc40 | 1062 | rc = tipc_node_xmit(net, &pktchain, dnode, portid); |
4ccfe5e0 | 1063 | if (likely(!rc)) { |
60120526 | 1064 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1065 | sent += send; |
1066 | if (sent == dsz) | |
22d85c79 | 1067 | return dsz; |
4ccfe5e0 JPM |
1068 | goto next; |
1069 | } | |
1070 | if (rc == -EMSGSIZE) { | |
f214fc40 | 1071 | __skb_queue_purge(&pktchain); |
f2f9800d YX |
1072 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1073 | portid); | |
f25dcc76 | 1074 | m->msg_iter = save; |
4ccfe5e0 JPM |
1075 | goto next; |
1076 | } | |
1077 | if (rc != -ELINKCONG) | |
1078 | break; | |
22d85c79 | 1079 | |
50100a5e | 1080 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1081 | } |
1082 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
1083 | } while (!rc); | |
39a0295f | 1084 | |
f214fc40 | 1085 | __skb_queue_purge(&pktchain); |
4ccfe5e0 | 1086 | return sent ? sent : rc; |
b97bf3fd PL |
1087 | } |
1088 | ||
c4307285 | 1089 | /** |
4ccfe5e0 | 1090 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1091 | * @sock: socket structure |
4ccfe5e0 JPM |
1092 | * @m: message to send |
1093 | * @dsz: length of data to be transmitted | |
c4307285 | 1094 | * |
4ccfe5e0 | 1095 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1096 | * |
4ccfe5e0 | 1097 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1098 | */ |
1b784140 | 1099 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1100 | { |
4ccfe5e0 JPM |
1101 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1102 | return -EMSGSIZE; | |
b97bf3fd | 1103 | |
1b784140 | 1104 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1105 | } |
1106 | ||
dadebc00 | 1107 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1108 | */ |
301bae56 | 1109 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1110 | u32 peer_node) |
b97bf3fd | 1111 | { |
3721e9c7 YX |
1112 | struct sock *sk = &tsk->sk; |
1113 | struct net *net = sock_net(sk); | |
301bae56 | 1114 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1115 | |
dadebc00 JPM |
1116 | msg_set_destnode(msg, peer_node); |
1117 | msg_set_destport(msg, peer_port); | |
1118 | msg_set_type(msg, TIPC_CONN_MSG); | |
1119 | msg_set_lookup_scope(msg, 0); | |
1120 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1121 | |
2f55c437 | 1122 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 JPM |
1123 | tsk->probing_state = TIPC_CONN_OK; |
1124 | tsk->connected = 1; | |
3721e9c7 | 1125 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
f2f9800d YX |
1126 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1127 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
b97bf3fd PL |
1128 | } |
1129 | ||
1130 | /** | |
1131 | * set_orig_addr - capture sender's address for received message | |
1132 | * @m: descriptor for message info | |
1133 | * @msg: received message header | |
c4307285 | 1134 | * |
b97bf3fd PL |
1135 | * Note: Address is not captured if not requested by receiver. |
1136 | */ | |
05790c64 | 1137 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1138 | { |
342dfc30 | 1139 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1140 | |
c4307285 | 1141 | if (addr) { |
b97bf3fd PL |
1142 | addr->family = AF_TIPC; |
1143 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1144 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1145 | addr->addr.id.ref = msg_origport(msg); |
1146 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1147 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1148 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1149 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1150 | } | |
1151 | } | |
1152 | ||
1153 | /** | |
301bae56 | 1154 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1155 | * @m: descriptor for message info |
1156 | * @msg: received message header | |
301bae56 | 1157 | * @tsk: TIPC port associated with message |
c4307285 | 1158 | * |
b97bf3fd | 1159 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1160 | * |
b97bf3fd PL |
1161 | * Returns 0 if successful, otherwise errno |
1162 | */ | |
301bae56 JPM |
1163 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1164 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1165 | { |
1166 | u32 anc_data[3]; | |
1167 | u32 err; | |
1168 | u32 dest_type; | |
3546c750 | 1169 | int has_name; |
b97bf3fd PL |
1170 | int res; |
1171 | ||
1172 | if (likely(m->msg_controllen == 0)) | |
1173 | return 0; | |
1174 | ||
1175 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1176 | err = msg ? msg_errcode(msg) : 0; |
1177 | if (unlikely(err)) { | |
1178 | anc_data[0] = err; | |
1179 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1180 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1181 | if (res) | |
b97bf3fd | 1182 | return res; |
2db9983a AS |
1183 | if (anc_data[1]) { |
1184 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1185 | msg_data(msg)); | |
1186 | if (res) | |
1187 | return res; | |
1188 | } | |
b97bf3fd PL |
1189 | } |
1190 | ||
1191 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1192 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1193 | switch (dest_type) { | |
1194 | case TIPC_NAMED_MSG: | |
3546c750 | 1195 | has_name = 1; |
b97bf3fd PL |
1196 | anc_data[0] = msg_nametype(msg); |
1197 | anc_data[1] = msg_namelower(msg); | |
1198 | anc_data[2] = msg_namelower(msg); | |
1199 | break; | |
1200 | case TIPC_MCAST_MSG: | |
3546c750 | 1201 | has_name = 1; |
b97bf3fd PL |
1202 | anc_data[0] = msg_nametype(msg); |
1203 | anc_data[1] = msg_namelower(msg); | |
1204 | anc_data[2] = msg_nameupper(msg); | |
1205 | break; | |
1206 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1207 | has_name = (tsk->conn_type != 0); |
1208 | anc_data[0] = tsk->conn_type; | |
1209 | anc_data[1] = tsk->conn_instance; | |
1210 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1211 | break; |
1212 | default: | |
3546c750 | 1213 | has_name = 0; |
b97bf3fd | 1214 | } |
2db9983a AS |
1215 | if (has_name) { |
1216 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1217 | if (res) | |
1218 | return res; | |
1219 | } | |
b97bf3fd PL |
1220 | |
1221 | return 0; | |
1222 | } | |
1223 | ||
301bae56 | 1224 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
739f5e4e | 1225 | { |
f2f9800d | 1226 | struct net *net = sock_net(&tsk->sk); |
a6ca1094 | 1227 | struct sk_buff *skb = NULL; |
739f5e4e | 1228 | struct tipc_msg *msg; |
301bae56 JPM |
1229 | u32 peer_port = tsk_peer_port(tsk); |
1230 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1231 | |
301bae56 | 1232 | if (!tsk->connected) |
739f5e4e | 1233 | return; |
c5898636 JPM |
1234 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1235 | dnode, tsk_own_node(tsk), peer_port, | |
1236 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1237 | if (!skb) |
739f5e4e | 1238 | return; |
a6ca1094 | 1239 | msg = buf_msg(skb); |
739f5e4e | 1240 | msg_set_msgcnt(msg, ack); |
af9b028e | 1241 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1242 | } |
1243 | ||
85d3fc94 | 1244 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1245 | { |
1246 | struct sock *sk = sock->sk; | |
1247 | DEFINE_WAIT(wait); | |
85d3fc94 | 1248 | long timeo = *timeop; |
9bbb4ecc YX |
1249 | int err; |
1250 | ||
1251 | for (;;) { | |
1252 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1253 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1254 | if (sock->state == SS_DISCONNECTING) { |
1255 | err = -ENOTCONN; | |
1256 | break; | |
1257 | } | |
1258 | release_sock(sk); | |
1259 | timeo = schedule_timeout(timeo); | |
1260 | lock_sock(sk); | |
1261 | } | |
1262 | err = 0; | |
1263 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1264 | break; | |
9bbb4ecc YX |
1265 | err = -EAGAIN; |
1266 | if (!timeo) | |
1267 | break; | |
143fe22f EH |
1268 | err = sock_intr_errno(timeo); |
1269 | if (signal_pending(current)) | |
1270 | break; | |
9bbb4ecc YX |
1271 | } |
1272 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1273 | *timeop = timeo; |
9bbb4ecc YX |
1274 | return err; |
1275 | } | |
1276 | ||
c4307285 | 1277 | /** |
247f0f3c | 1278 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1279 | * @m: descriptor for message info |
1280 | * @buf_len: total size of user buffer area | |
1281 | * @flags: receive flags | |
c4307285 | 1282 | * |
b97bf3fd PL |
1283 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1284 | * If the complete message doesn't fit in user area, truncate it. | |
1285 | * | |
1286 | * Returns size of returned message data, errno otherwise | |
1287 | */ | |
1b784140 YX |
1288 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1289 | int flags) | |
b97bf3fd | 1290 | { |
0c3141e9 | 1291 | struct sock *sk = sock->sk; |
58ed9442 | 1292 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1293 | struct sk_buff *buf; |
1294 | struct tipc_msg *msg; | |
9bbb4ecc | 1295 | long timeo; |
b97bf3fd PL |
1296 | unsigned int sz; |
1297 | u32 err; | |
1298 | int res; | |
1299 | ||
0c3141e9 | 1300 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1301 | if (unlikely(!buf_len)) |
1302 | return -EINVAL; | |
1303 | ||
0c3141e9 | 1304 | lock_sock(sk); |
b97bf3fd | 1305 | |
0c3141e9 AS |
1306 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1307 | res = -ENOTCONN; | |
b97bf3fd PL |
1308 | goto exit; |
1309 | } | |
1310 | ||
9bbb4ecc | 1311 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1312 | restart: |
b97bf3fd | 1313 | |
0c3141e9 | 1314 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1315 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1316 | if (res) |
1317 | goto exit; | |
b97bf3fd | 1318 | |
0c3141e9 | 1319 | /* Look at first message in receive queue */ |
0c3141e9 | 1320 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1321 | msg = buf_msg(buf); |
1322 | sz = msg_data_sz(msg); | |
1323 | err = msg_errcode(msg); | |
1324 | ||
b97bf3fd | 1325 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1326 | if ((!sz) && (!err)) { |
2e84c60b | 1327 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1328 | goto restart; |
1329 | } | |
1330 | ||
1331 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1332 | set_orig_addr(m, msg); |
1333 | ||
1334 | /* Capture ancillary data (optional) */ | |
301bae56 | 1335 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1336 | if (res) |
b97bf3fd PL |
1337 | goto exit; |
1338 | ||
1339 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1340 | if (!err) { |
1341 | if (unlikely(buf_len < sz)) { | |
1342 | sz = buf_len; | |
1343 | m->msg_flags |= MSG_TRUNC; | |
1344 | } | |
51f3d02b | 1345 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
0232fd0a | 1346 | if (res) |
b97bf3fd | 1347 | goto exit; |
b97bf3fd PL |
1348 | res = sz; |
1349 | } else { | |
1350 | if ((sock->state == SS_READY) || | |
1351 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1352 | res = 0; | |
1353 | else | |
1354 | res = -ECONNRESET; | |
1355 | } | |
1356 | ||
1357 | /* Consume received message (optional) */ | |
b97bf3fd | 1358 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1359 | if ((sock->state != SS_READY) && |
60120526 | 1360 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1361 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1362 | tsk->rcv_unacked = 0; |
1363 | } | |
2e84c60b | 1364 | tsk_advance_rx_queue(sk); |
c4307285 | 1365 | } |
b97bf3fd | 1366 | exit: |
0c3141e9 | 1367 | release_sock(sk); |
b97bf3fd PL |
1368 | return res; |
1369 | } | |
1370 | ||
c4307285 | 1371 | /** |
247f0f3c | 1372 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1373 | * @m: descriptor for message info |
1374 | * @buf_len: total size of user buffer area | |
1375 | * @flags: receive flags | |
c4307285 YH |
1376 | * |
1377 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1378 | * will optionally wait for more; never truncates data. |
1379 | * | |
1380 | * Returns size of returned message data, errno otherwise | |
1381 | */ | |
1b784140 YX |
1382 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1383 | size_t buf_len, int flags) | |
b97bf3fd | 1384 | { |
0c3141e9 | 1385 | struct sock *sk = sock->sk; |
58ed9442 | 1386 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1387 | struct sk_buff *buf; |
1388 | struct tipc_msg *msg; | |
9bbb4ecc | 1389 | long timeo; |
b97bf3fd | 1390 | unsigned int sz; |
3720d40b | 1391 | int sz_to_copy, target, needed; |
b97bf3fd | 1392 | int sz_copied = 0; |
b97bf3fd | 1393 | u32 err; |
0c3141e9 | 1394 | int res = 0; |
b97bf3fd | 1395 | |
0c3141e9 | 1396 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1397 | if (unlikely(!buf_len)) |
1398 | return -EINVAL; | |
1399 | ||
0c3141e9 | 1400 | lock_sock(sk); |
b97bf3fd | 1401 | |
9bbb4ecc | 1402 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1403 | res = -ENOTCONN; |
b97bf3fd PL |
1404 | goto exit; |
1405 | } | |
1406 | ||
3720d40b | 1407 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1408 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1409 | |
617d3c7a | 1410 | restart: |
0c3141e9 | 1411 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1412 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1413 | if (res) |
1414 | goto exit; | |
b97bf3fd | 1415 | |
0c3141e9 | 1416 | /* Look at first message in receive queue */ |
0c3141e9 | 1417 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1418 | msg = buf_msg(buf); |
1419 | sz = msg_data_sz(msg); | |
1420 | err = msg_errcode(msg); | |
1421 | ||
1422 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1423 | if ((!sz) && (!err)) { |
2e84c60b | 1424 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1425 | goto restart; |
1426 | } | |
1427 | ||
1428 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1429 | if (sz_copied == 0) { |
1430 | set_orig_addr(m, msg); | |
301bae56 | 1431 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1432 | if (res) |
b97bf3fd PL |
1433 | goto exit; |
1434 | } | |
1435 | ||
1436 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1437 | if (!err) { |
0232fd0a | 1438 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1439 | |
0232fd0a | 1440 | sz -= offset; |
b97bf3fd PL |
1441 | needed = (buf_len - sz_copied); |
1442 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a | 1443 | |
51f3d02b DM |
1444 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
1445 | m, sz_to_copy); | |
0232fd0a | 1446 | if (res) |
b97bf3fd | 1447 | goto exit; |
0232fd0a | 1448 | |
b97bf3fd PL |
1449 | sz_copied += sz_to_copy; |
1450 | ||
1451 | if (sz_to_copy < sz) { | |
1452 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1453 | TIPC_SKB_CB(buf)->handle = |
1454 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1455 | goto exit; |
1456 | } | |
b97bf3fd PL |
1457 | } else { |
1458 | if (sz_copied != 0) | |
1459 | goto exit; /* can't add error msg to valid data */ | |
1460 | ||
1461 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1462 | res = 0; | |
1463 | else | |
1464 | res = -ECONNRESET; | |
1465 | } | |
1466 | ||
1467 | /* Consume received message (optional) */ | |
b97bf3fd | 1468 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1469 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1470 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1471 | tsk->rcv_unacked = 0; |
1472 | } | |
2e84c60b | 1473 | tsk_advance_rx_queue(sk); |
c4307285 | 1474 | } |
b97bf3fd PL |
1475 | |
1476 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1477 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1478 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1479 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1480 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1481 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1482 | goto restart; |
1483 | ||
1484 | exit: | |
0c3141e9 | 1485 | release_sock(sk); |
a3b0a5a9 | 1486 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1487 | } |
1488 | ||
f288bef4 YX |
1489 | /** |
1490 | * tipc_write_space - wake up thread if port congestion is released | |
1491 | * @sk: socket | |
1492 | */ | |
1493 | static void tipc_write_space(struct sock *sk) | |
1494 | { | |
1495 | struct socket_wq *wq; | |
1496 | ||
1497 | rcu_read_lock(); | |
1498 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1499 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1500 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
1501 | POLLWRNORM | POLLWRBAND); | |
1502 | rcu_read_unlock(); | |
1503 | } | |
1504 | ||
1505 | /** | |
1506 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1507 | * @sk: socket | |
1508 | * @len: the length of messages | |
1509 | */ | |
676d2369 | 1510 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1511 | { |
1512 | struct socket_wq *wq; | |
1513 | ||
1514 | rcu_read_lock(); | |
1515 | wq = rcu_dereference(sk->sk_wq); | |
1ce0bf50 | 1516 | if (skwq_has_sleeper(wq)) |
f288bef4 YX |
1517 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
1518 | POLLRDNORM | POLLRDBAND); | |
1519 | rcu_read_unlock(); | |
1520 | } | |
1521 | ||
f4195d1e YX |
1522 | static void tipc_sock_destruct(struct sock *sk) |
1523 | { | |
1524 | __skb_queue_purge(&sk->sk_receive_queue); | |
1525 | } | |
1526 | ||
7e6c131e YX |
1527 | /** |
1528 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1529 | * @tsk: TIPC socket |
1186adf7 | 1530 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1531 | * |
cda3696d | 1532 | * Returns true if everything ok, false otherwise |
7e6c131e | 1533 | */ |
cda3696d | 1534 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
7e6c131e | 1535 | { |
58ed9442 | 1536 | struct sock *sk = &tsk->sk; |
f2f9800d | 1537 | struct net *net = sock_net(sk); |
8826cde6 | 1538 | struct socket *sock = sk->sk_socket; |
cda3696d | 1539 | struct tipc_msg *hdr = buf_msg(skb); |
7e6c131e | 1540 | |
cda3696d JPM |
1541 | if (unlikely(msg_mcast(hdr))) |
1542 | return false; | |
7e6c131e YX |
1543 | |
1544 | switch ((int)sock->state) { | |
1545 | case SS_CONNECTED: | |
cda3696d | 1546 | |
7e6c131e | 1547 | /* Accept only connection-based messages sent by peer */ |
cda3696d JPM |
1548 | if (unlikely(!tsk_peer_msg(tsk, hdr))) |
1549 | return false; | |
1550 | ||
1551 | if (unlikely(msg_errcode(hdr))) { | |
1552 | sock->state = SS_DISCONNECTING; | |
1553 | tsk->connected = 0; | |
1554 | /* Let timer expire on it's own */ | |
1555 | tipc_node_remove_conn(net, tsk_peer_node(tsk), | |
1556 | tsk->portid); | |
7e6c131e | 1557 | } |
cda3696d JPM |
1558 | return true; |
1559 | ||
7e6c131e | 1560 | case SS_CONNECTING: |
dadebc00 | 1561 | |
cda3696d JPM |
1562 | /* Accept only ACK or NACK message */ |
1563 | if (unlikely(!msg_connected(hdr))) | |
1564 | return false; | |
dadebc00 | 1565 | |
cda3696d | 1566 | if (unlikely(msg_errcode(hdr))) { |
584d24b3 | 1567 | sock->state = SS_DISCONNECTING; |
2c8d8518 | 1568 | sk->sk_err = ECONNREFUSED; |
cda3696d | 1569 | return true; |
584d24b3 YX |
1570 | } |
1571 | ||
cda3696d | 1572 | if (unlikely(!msg_isdata(hdr))) { |
584d24b3 | 1573 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1574 | sk->sk_err = EINVAL; |
cda3696d | 1575 | return true; |
584d24b3 YX |
1576 | } |
1577 | ||
cda3696d JPM |
1578 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
1579 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); | |
dadebc00 JPM |
1580 | sock->state = SS_CONNECTED; |
1581 | ||
cda3696d JPM |
1582 | /* If 'ACK+' message, add to socket receive queue */ |
1583 | if (msg_data_sz(hdr)) | |
1584 | return true; | |
1585 | ||
1586 | /* If empty 'ACK-' message, wake up sleeping connect() */ | |
1587 | if (waitqueue_active(sk_sleep(sk))) | |
1588 | wake_up_interruptible(sk_sleep(sk)); | |
1589 | ||
1590 | /* 'ACK-' message is neither accepted nor rejected: */ | |
1591 | msg_set_dest_droppable(hdr, 1); | |
1592 | return false; | |
1593 | ||
7e6c131e YX |
1594 | case SS_LISTENING: |
1595 | case SS_UNCONNECTED: | |
cda3696d | 1596 | |
7e6c131e | 1597 | /* Accept only SYN message */ |
cda3696d JPM |
1598 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
1599 | return true; | |
7e6c131e YX |
1600 | break; |
1601 | case SS_DISCONNECTING: | |
1602 | break; | |
1603 | default: | |
1604 | pr_err("Unknown socket state %u\n", sock->state); | |
1605 | } | |
cda3696d | 1606 | return false; |
7e6c131e YX |
1607 | } |
1608 | ||
aba79f33 YX |
1609 | /** |
1610 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1611 | * @sk: socket | |
1612 | * @buf: message | |
1613 | * | |
1614 | * For all connection oriented messages, irrespective of importance, | |
1615 | * the default overload value (i.e. 67MB) is set as limit. | |
1616 | * | |
1617 | * For all connectionless messages, by default new queue limits are | |
1618 | * as belows: | |
1619 | * | |
cc79dd1b YX |
1620 | * TIPC_LOW_IMPORTANCE (4 MB) |
1621 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1622 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1623 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1624 | * |
1625 | * Returns overload limit according to corresponding message importance | |
1626 | */ | |
1627 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1628 | { | |
1629 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1630 | |
1631 | if (msg_connected(msg)) | |
0cee6bbe | 1632 | return sysctl_tipc_rmem[2]; |
1633 | ||
1634 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1635 | msg_importance(msg); | |
aba79f33 YX |
1636 | } |
1637 | ||
c4307285 | 1638 | /** |
0c3141e9 AS |
1639 | * filter_rcv - validate incoming message |
1640 | * @sk: socket | |
cda3696d | 1641 | * @skb: pointer to message. |
c4307285 | 1642 | * |
0c3141e9 AS |
1643 | * Enqueues message on receive queue if acceptable; optionally handles |
1644 | * disconnect indication for a connected socket. | |
1645 | * | |
1186adf7 | 1646 | * Called with socket lock already taken |
c4307285 | 1647 | * |
cda3696d | 1648 | * Returns true if message was added to socket receive queue, otherwise false |
b97bf3fd | 1649 | */ |
cda3696d | 1650 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb) |
b97bf3fd | 1651 | { |
0c3141e9 | 1652 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1653 | struct tipc_sock *tsk = tipc_sk(sk); |
cda3696d JPM |
1654 | struct tipc_msg *hdr = buf_msg(skb); |
1655 | unsigned int limit = rcvbuf_limit(sk, skb); | |
1656 | int err = TIPC_OK; | |
1657 | int usr = msg_user(hdr); | |
b97bf3fd | 1658 | |
cda3696d JPM |
1659 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
1660 | tipc_sk_proto_rcv(tsk, skb); | |
1661 | return false; | |
1186adf7 | 1662 | } |
ec8a2e56 | 1663 | |
cda3696d JPM |
1664 | if (unlikely(usr == SOCK_WAKEUP)) { |
1665 | kfree_skb(skb); | |
50100a5e JPM |
1666 | tsk->link_cong = 0; |
1667 | sk->sk_write_space(sk); | |
cda3696d | 1668 | return false; |
50100a5e JPM |
1669 | } |
1670 | ||
cda3696d JPM |
1671 | /* Drop if illegal message type */ |
1672 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { | |
1673 | kfree_skb(skb); | |
1674 | return false; | |
1675 | } | |
0c3141e9 | 1676 | |
cda3696d JPM |
1677 | /* Reject if wrong message type for current socket state */ |
1678 | if (unlikely(sock->state == SS_READY)) { | |
1679 | if (msg_connected(hdr)) { | |
1680 | err = TIPC_ERR_NO_PORT; | |
1681 | goto reject; | |
1682 | } | |
1683 | } else if (unlikely(!filter_connect(tsk, skb))) { | |
1684 | err = TIPC_ERR_NO_PORT; | |
1685 | goto reject; | |
b97bf3fd PL |
1686 | } |
1687 | ||
1688 | /* Reject message if there isn't room to queue it */ | |
cda3696d JPM |
1689 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
1690 | err = TIPC_ERR_OVERLOAD; | |
1691 | goto reject; | |
1692 | } | |
b97bf3fd | 1693 | |
aba79f33 | 1694 | /* Enqueue message */ |
cda3696d JPM |
1695 | TIPC_SKB_CB(skb)->handle = NULL; |
1696 | __skb_queue_tail(&sk->sk_receive_queue, skb); | |
1697 | skb_set_owner_r(skb, sk); | |
0c3141e9 | 1698 | |
676d2369 | 1699 | sk->sk_data_ready(sk); |
cda3696d JPM |
1700 | return true; |
1701 | ||
1702 | reject: | |
1703 | tipc_sk_respond(sk, skb, err); | |
1704 | return false; | |
0c3141e9 | 1705 | } |
b97bf3fd | 1706 | |
0c3141e9 | 1707 | /** |
4f4482dc | 1708 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1709 | * @sk: socket |
a6ca1094 | 1710 | * @skb: message |
0c3141e9 | 1711 | * |
e3a77561 | 1712 | * Caller must hold socket lock |
0c3141e9 AS |
1713 | * |
1714 | * Returns 0 | |
1715 | */ | |
a6ca1094 | 1716 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1717 | { |
cda3696d | 1718 | unsigned int truesize = skb->truesize; |
0c3141e9 | 1719 | |
cda3696d JPM |
1720 | if (likely(filter_rcv(sk, skb))) |
1721 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); | |
0c3141e9 AS |
1722 | return 0; |
1723 | } | |
1724 | ||
d570d864 | 1725 | /** |
c637c103 JPM |
1726 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1727 | * inputq and try adding them to socket or backlog queue | |
1728 | * @inputq: list of incoming buffers with potentially different destinations | |
1729 | * @sk: socket where the buffers should be enqueued | |
1730 | * @dport: port number for the socket | |
d570d864 JPM |
1731 | * |
1732 | * Caller must hold socket lock | |
d570d864 | 1733 | */ |
cda3696d JPM |
1734 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
1735 | u32 dport) | |
d570d864 JPM |
1736 | { |
1737 | unsigned int lim; | |
1738 | atomic_t *dcnt; | |
c637c103 JPM |
1739 | struct sk_buff *skb; |
1740 | unsigned long time_limit = jiffies + 2; | |
1741 | ||
1742 | while (skb_queue_len(inputq)) { | |
51a00daf | 1743 | if (unlikely(time_after_eq(jiffies, time_limit))) |
cda3696d JPM |
1744 | return; |
1745 | ||
c637c103 JPM |
1746 | skb = tipc_skb_dequeue(inputq, dport); |
1747 | if (unlikely(!skb)) | |
cda3696d JPM |
1748 | return; |
1749 | ||
1750 | /* Add message directly to receive queue if possible */ | |
c637c103 | 1751 | if (!sock_owned_by_user(sk)) { |
cda3696d JPM |
1752 | filter_rcv(sk, skb); |
1753 | continue; | |
c637c103 | 1754 | } |
cda3696d JPM |
1755 | |
1756 | /* Try backlog, compensating for double-counted bytes */ | |
c637c103 JPM |
1757 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
1758 | if (sk->sk_backlog.len) | |
1759 | atomic_set(dcnt, 0); | |
1760 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1761 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1762 | continue; | |
cda3696d JPM |
1763 | |
1764 | /* Overload => reject message back to sender */ | |
1765 | tipc_sk_respond(sk, skb, TIPC_ERR_OVERLOAD); | |
1766 | break; | |
c637c103 | 1767 | } |
d570d864 JPM |
1768 | } |
1769 | ||
0c3141e9 | 1770 | /** |
c637c103 JPM |
1771 | * tipc_sk_rcv - handle a chain of incoming buffers |
1772 | * @inputq: buffer list containing the buffers | |
1773 | * Consumes all buffers in list until inputq is empty | |
1774 | * Note: may be called in multiple threads referring to the same queue | |
0c3141e9 | 1775 | */ |
cda3696d | 1776 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1777 | { |
c637c103 | 1778 | u32 dnode, dport = 0; |
9871b27f | 1779 | int err; |
9816f061 | 1780 | struct tipc_sock *tsk; |
9816f061 | 1781 | struct sock *sk; |
cda3696d | 1782 | struct sk_buff *skb; |
9816f061 | 1783 | |
c637c103 | 1784 | while (skb_queue_len(inputq)) { |
c637c103 JPM |
1785 | dport = tipc_skb_peek_port(inputq, dport); |
1786 | tsk = tipc_sk_lookup(net, dport); | |
cda3696d | 1787 | |
c637c103 JPM |
1788 | if (likely(tsk)) { |
1789 | sk = &tsk->sk; | |
1790 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
cda3696d | 1791 | tipc_sk_enqueue(inputq, sk, dport); |
c637c103 | 1792 | spin_unlock_bh(&sk->sk_lock.slock); |
c637c103 JPM |
1793 | } |
1794 | sock_put(sk); | |
c637c103 | 1795 | continue; |
c637c103 | 1796 | } |
cda3696d JPM |
1797 | |
1798 | /* No destination socket => dequeue skb if still there */ | |
1799 | skb = tipc_skb_dequeue(inputq, dport); | |
1800 | if (!skb) | |
1801 | return; | |
1802 | ||
1803 | /* Try secondary lookup if unresolved named message */ | |
1804 | err = TIPC_ERR_NO_PORT; | |
1805 | if (tipc_msg_lookup_dest(net, skb, &err)) | |
1806 | goto xmit; | |
1807 | ||
1808 | /* Prepare for message rejection */ | |
1809 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) | |
c637c103 | 1810 | continue; |
e3a77561 | 1811 | xmit: |
cda3696d | 1812 | dnode = msg_destnode(buf_msg(skb)); |
af9b028e | 1813 | tipc_node_xmit_skb(net, skb, dnode, dport); |
c637c103 | 1814 | } |
b97bf3fd PL |
1815 | } |
1816 | ||
78eb3a53 YX |
1817 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1818 | { | |
1819 | struct sock *sk = sock->sk; | |
1820 | DEFINE_WAIT(wait); | |
1821 | int done; | |
1822 | ||
1823 | do { | |
1824 | int err = sock_error(sk); | |
1825 | if (err) | |
1826 | return err; | |
1827 | if (!*timeo_p) | |
1828 | return -ETIMEDOUT; | |
1829 | if (signal_pending(current)) | |
1830 | return sock_intr_errno(*timeo_p); | |
1831 | ||
1832 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1833 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1834 | finish_wait(sk_sleep(sk), &wait); | |
1835 | } while (!done); | |
1836 | return 0; | |
1837 | } | |
1838 | ||
b97bf3fd | 1839 | /** |
247f0f3c | 1840 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1841 | * @sock: socket structure |
1842 | * @dest: socket address for destination port | |
1843 | * @destlen: size of socket address data structure | |
0c3141e9 | 1844 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1845 | * |
1846 | * Returns 0 on success, errno otherwise | |
1847 | */ | |
247f0f3c YX |
1848 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1849 | int destlen, int flags) | |
b97bf3fd | 1850 | { |
0c3141e9 | 1851 | struct sock *sk = sock->sk; |
f2f8036e | 1852 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1853 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1854 | struct msghdr m = {NULL,}; | |
f2f8036e | 1855 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
78eb3a53 | 1856 | socket_state previous; |
f2f8036e | 1857 | int res = 0; |
b89741a0 | 1858 | |
0c3141e9 AS |
1859 | lock_sock(sk); |
1860 | ||
f2f8036e | 1861 | /* DGRAM/RDM connect(), just save the destaddr */ |
0c3141e9 | 1862 | if (sock->state == SS_READY) { |
f2f8036e EH |
1863 | if (dst->family == AF_UNSPEC) { |
1864 | memset(&tsk->remote, 0, sizeof(struct sockaddr_tipc)); | |
1865 | tsk->connected = 0; | |
610600c8 SL |
1866 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1867 | res = -EINVAL; | |
f2f8036e EH |
1868 | } else { |
1869 | memcpy(&tsk->remote, dest, destlen); | |
1870 | tsk->connected = 1; | |
1871 | } | |
0c3141e9 AS |
1872 | goto exit; |
1873 | } | |
b89741a0 | 1874 | |
b89741a0 AS |
1875 | /* |
1876 | * Reject connection attempt using multicast address | |
1877 | * | |
1878 | * Note: send_msg() validates the rest of the address fields, | |
1879 | * so there's no need to do it here | |
1880 | */ | |
0c3141e9 AS |
1881 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1882 | res = -EINVAL; | |
1883 | goto exit; | |
1884 | } | |
1885 | ||
78eb3a53 | 1886 | previous = sock->state; |
584d24b3 YX |
1887 | switch (sock->state) { |
1888 | case SS_UNCONNECTED: | |
1889 | /* Send a 'SYN-' to destination */ | |
1890 | m.msg_name = dest; | |
1891 | m.msg_namelen = destlen; | |
1892 | ||
1893 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1894 | * indicate send_msg() is never blocked. | |
1895 | */ | |
1896 | if (!timeout) | |
1897 | m.msg_flags = MSG_DONTWAIT; | |
1898 | ||
39a0295f | 1899 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1900 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1901 | goto exit; | |
1902 | ||
1903 | /* Just entered SS_CONNECTING state; the only | |
1904 | * difference is that return value in non-blocking | |
1905 | * case is EINPROGRESS, rather than EALREADY. | |
1906 | */ | |
1907 | res = -EINPROGRESS; | |
584d24b3 | 1908 | case SS_CONNECTING: |
78eb3a53 YX |
1909 | if (previous == SS_CONNECTING) |
1910 | res = -EALREADY; | |
1911 | if (!timeout) | |
1912 | goto exit; | |
1913 | timeout = msecs_to_jiffies(timeout); | |
1914 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1915 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1916 | break; |
1917 | case SS_CONNECTED: | |
1918 | res = -EISCONN; | |
1919 | break; | |
1920 | default: | |
1921 | res = -EINVAL; | |
78eb3a53 | 1922 | break; |
b89741a0 | 1923 | } |
0c3141e9 AS |
1924 | exit: |
1925 | release_sock(sk); | |
b89741a0 | 1926 | return res; |
b97bf3fd PL |
1927 | } |
1928 | ||
c4307285 | 1929 | /** |
247f0f3c | 1930 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1931 | * @sock: socket structure |
1932 | * @len: (unused) | |
c4307285 | 1933 | * |
b97bf3fd PL |
1934 | * Returns 0 on success, errno otherwise |
1935 | */ | |
247f0f3c | 1936 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1937 | { |
0c3141e9 AS |
1938 | struct sock *sk = sock->sk; |
1939 | int res; | |
1940 | ||
1941 | lock_sock(sk); | |
b97bf3fd | 1942 | |
245f3d34 | 1943 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1944 | res = -EINVAL; |
1945 | else { | |
1946 | sock->state = SS_LISTENING; | |
1947 | res = 0; | |
1948 | } | |
1949 | ||
1950 | release_sock(sk); | |
1951 | return res; | |
b97bf3fd PL |
1952 | } |
1953 | ||
6398e23c YX |
1954 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1955 | { | |
1956 | struct sock *sk = sock->sk; | |
1957 | DEFINE_WAIT(wait); | |
1958 | int err; | |
1959 | ||
1960 | /* True wake-one mechanism for incoming connections: only | |
1961 | * one process gets woken up, not the 'whole herd'. | |
1962 | * Since we do not 'race & poll' for established sockets | |
1963 | * anymore, the common case will execute the loop only once. | |
1964 | */ | |
1965 | for (;;) { | |
1966 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1967 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1968 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1969 | release_sock(sk); |
1970 | timeo = schedule_timeout(timeo); | |
1971 | lock_sock(sk); | |
1972 | } | |
1973 | err = 0; | |
1974 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1975 | break; | |
1976 | err = -EINVAL; | |
1977 | if (sock->state != SS_LISTENING) | |
1978 | break; | |
6398e23c YX |
1979 | err = -EAGAIN; |
1980 | if (!timeo) | |
1981 | break; | |
143fe22f EH |
1982 | err = sock_intr_errno(timeo); |
1983 | if (signal_pending(current)) | |
1984 | break; | |
6398e23c YX |
1985 | } |
1986 | finish_wait(sk_sleep(sk), &wait); | |
1987 | return err; | |
1988 | } | |
1989 | ||
c4307285 | 1990 | /** |
247f0f3c | 1991 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1992 | * @sock: listening socket |
1993 | * @newsock: new socket that is to be connected | |
1994 | * @flags: file-related flags associated with socket | |
c4307285 | 1995 | * |
b97bf3fd PL |
1996 | * Returns 0 on success, errno otherwise |
1997 | */ | |
247f0f3c | 1998 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1999 | { |
0fef8f20 | 2000 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 2001 | struct sk_buff *buf; |
301bae56 | 2002 | struct tipc_sock *new_tsock; |
0fef8f20 | 2003 | struct tipc_msg *msg; |
6398e23c | 2004 | long timeo; |
0c3141e9 | 2005 | int res; |
b97bf3fd | 2006 | |
0c3141e9 | 2007 | lock_sock(sk); |
b97bf3fd | 2008 | |
0c3141e9 AS |
2009 | if (sock->state != SS_LISTENING) { |
2010 | res = -EINVAL; | |
b97bf3fd PL |
2011 | goto exit; |
2012 | } | |
6398e23c YX |
2013 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2014 | res = tipc_wait_for_accept(sock, timeo); | |
2015 | if (res) | |
2016 | goto exit; | |
0c3141e9 AS |
2017 | |
2018 | buf = skb_peek(&sk->sk_receive_queue); | |
2019 | ||
c5fa7b3c | 2020 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
2021 | if (res) |
2022 | goto exit; | |
fdd75ea8 | 2023 | security_sk_clone(sock->sk, new_sock->sk); |
b97bf3fd | 2024 | |
0fef8f20 | 2025 | new_sk = new_sock->sk; |
301bae56 | 2026 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2027 | msg = buf_msg(buf); |
b97bf3fd | 2028 | |
0fef8f20 PG |
2029 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2030 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2031 | ||
2032 | /* | |
2033 | * Reject any stray messages received by new socket | |
2034 | * before the socket lock was taken (very, very unlikely) | |
2035 | */ | |
2e84c60b | 2036 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2037 | |
2038 | /* Connect new socket to it's peer */ | |
301bae56 | 2039 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2040 | new_sock->state = SS_CONNECTED; |
2041 | ||
301bae56 | 2042 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2043 | if (msg_named(msg)) { |
301bae56 JPM |
2044 | new_tsock->conn_type = msg_nametype(msg); |
2045 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2046 | } |
0fef8f20 PG |
2047 | |
2048 | /* | |
2049 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2050 | * Respond to 'SYN+' by queuing it on new socket. | |
2051 | */ | |
2052 | if (!msg_data_sz(msg)) { | |
2053 | struct msghdr m = {NULL,}; | |
2054 | ||
2e84c60b | 2055 | tsk_advance_rx_queue(sk); |
39a0295f | 2056 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2057 | } else { |
2058 | __skb_dequeue(&sk->sk_receive_queue); | |
2059 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2060 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2061 | } |
2062 | release_sock(new_sk); | |
b97bf3fd | 2063 | exit: |
0c3141e9 | 2064 | release_sock(sk); |
b97bf3fd PL |
2065 | return res; |
2066 | } | |
2067 | ||
2068 | /** | |
247f0f3c | 2069 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2070 | * @sock: socket structure |
e247a8f5 | 2071 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2072 | * |
2073 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2074 | * |
b97bf3fd PL |
2075 | * Returns 0 on success, errno otherwise |
2076 | */ | |
247f0f3c | 2077 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2078 | { |
0c3141e9 | 2079 | struct sock *sk = sock->sk; |
f2f9800d | 2080 | struct net *net = sock_net(sk); |
58ed9442 | 2081 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2082 | struct sk_buff *skb; |
cda3696d JPM |
2083 | u32 dnode = tsk_peer_node(tsk); |
2084 | u32 dport = tsk_peer_port(tsk); | |
2085 | u32 onode = tipc_own_addr(net); | |
2086 | u32 oport = tsk->portid; | |
b97bf3fd PL |
2087 | int res; |
2088 | ||
e247a8f5 AS |
2089 | if (how != SHUT_RDWR) |
2090 | return -EINVAL; | |
b97bf3fd | 2091 | |
0c3141e9 | 2092 | lock_sock(sk); |
b97bf3fd PL |
2093 | |
2094 | switch (sock->state) { | |
0c3141e9 | 2095 | case SS_CONNECTING: |
b97bf3fd PL |
2096 | case SS_CONNECTED: |
2097 | ||
b97bf3fd | 2098 | restart: |
bcd3ffd4 JPM |
2099 | dnode = tsk_peer_node(tsk); |
2100 | ||
617d3c7a | 2101 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2102 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2103 | if (skb) { | |
2104 | if (TIPC_SKB_CB(skb)->handle != NULL) { | |
2105 | kfree_skb(skb); | |
b97bf3fd PL |
2106 | goto restart; |
2107 | } | |
bcd3ffd4 | 2108 | tipc_sk_respond(sk, skb, TIPC_CONN_SHUTDOWN); |
0c3141e9 | 2109 | } else { |
c5898636 | 2110 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
80e44c22 | 2111 | TIPC_CONN_MSG, SHORT_H_SIZE, |
cda3696d JPM |
2112 | 0, dnode, onode, dport, oport, |
2113 | TIPC_CONN_SHUTDOWN); | |
af9b028e | 2114 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); |
b97bf3fd | 2115 | } |
301bae56 | 2116 | tsk->connected = 0; |
0c3141e9 | 2117 | sock->state = SS_DISCONNECTING; |
f2f9800d | 2118 | tipc_node_remove_conn(net, dnode, tsk->portid); |
b97bf3fd PL |
2119 | /* fall through */ |
2120 | ||
2121 | case SS_DISCONNECTING: | |
2122 | ||
75031151 | 2123 | /* Discard any unreceived messages */ |
57467e56 | 2124 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2125 | |
2126 | /* Wake up anyone sleeping in poll */ | |
2127 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2128 | res = 0; |
2129 | break; | |
2130 | ||
2131 | default: | |
2132 | res = -ENOTCONN; | |
2133 | } | |
2134 | ||
0c3141e9 | 2135 | release_sock(sk); |
b97bf3fd PL |
2136 | return res; |
2137 | } | |
2138 | ||
f2f2a96a | 2139 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2140 | { |
f2f2a96a YX |
2141 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2142 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2143 | struct sk_buff *skb = NULL; |
57289015 | 2144 | u32 peer_port, peer_node; |
c5898636 | 2145 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2146 | |
6c9808ce | 2147 | bh_lock_sock(sk); |
301bae56 | 2148 | if (!tsk->connected) { |
6c9808ce JPM |
2149 | bh_unlock_sock(sk); |
2150 | goto exit; | |
57289015 | 2151 | } |
301bae56 JPM |
2152 | peer_port = tsk_peer_port(tsk); |
2153 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2154 | |
301bae56 | 2155 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
b3be5e3e EH |
2156 | if (!sock_owned_by_user(sk)) { |
2157 | sk->sk_socket->state = SS_DISCONNECTING; | |
2158 | tsk->connected = 0; | |
2159 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
2160 | tsk_peer_port(tsk)); | |
2161 | sk->sk_state_change(sk); | |
2162 | } else { | |
2163 | /* Try again later */ | |
2164 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2165 | } | |
2166 | ||
57289015 | 2167 | } else { |
c5898636 JPM |
2168 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
2169 | INT_H_SIZE, 0, peer_node, own_node, | |
f2f2a96a | 2170 | peer_port, tsk->portid, TIPC_OK); |
301bae56 | 2171 | tsk->probing_state = TIPC_CONN_PROBING; |
3721e9c7 | 2172 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2173 | } |
2174 | bh_unlock_sock(sk); | |
a6ca1094 | 2175 | if (skb) |
af9b028e | 2176 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2177 | exit: |
07f6c4bc | 2178 | sock_put(sk); |
57289015 JPM |
2179 | } |
2180 | ||
301bae56 | 2181 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2182 | struct tipc_name_seq const *seq) |
2183 | { | |
f2f9800d | 2184 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2185 | struct publication *publ; |
2186 | u32 key; | |
2187 | ||
301bae56 | 2188 | if (tsk->connected) |
0fc87aae | 2189 | return -EINVAL; |
07f6c4bc YX |
2190 | key = tsk->portid + tsk->pub_count + 1; |
2191 | if (key == tsk->portid) | |
0fc87aae JPM |
2192 | return -EADDRINUSE; |
2193 | ||
f2f9800d | 2194 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2195 | scope, tsk->portid, key); |
0fc87aae JPM |
2196 | if (unlikely(!publ)) |
2197 | return -EINVAL; | |
2198 | ||
301bae56 JPM |
2199 | list_add(&publ->pport_list, &tsk->publications); |
2200 | tsk->pub_count++; | |
2201 | tsk->published = 1; | |
0fc87aae JPM |
2202 | return 0; |
2203 | } | |
2204 | ||
301bae56 | 2205 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2206 | struct tipc_name_seq const *seq) |
2207 | { | |
f2f9800d | 2208 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2209 | struct publication *publ; |
2210 | struct publication *safe; | |
2211 | int rc = -EINVAL; | |
2212 | ||
301bae56 | 2213 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2214 | if (seq) { |
2215 | if (publ->scope != scope) | |
2216 | continue; | |
2217 | if (publ->type != seq->type) | |
2218 | continue; | |
2219 | if (publ->lower != seq->lower) | |
2220 | continue; | |
2221 | if (publ->upper != seq->upper) | |
2222 | break; | |
f2f9800d | 2223 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2224 | publ->ref, publ->key); |
2225 | rc = 0; | |
2226 | break; | |
2227 | } | |
f2f9800d | 2228 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2229 | publ->ref, publ->key); |
2230 | rc = 0; | |
2231 | } | |
301bae56 JPM |
2232 | if (list_empty(&tsk->publications)) |
2233 | tsk->published = 0; | |
0fc87aae JPM |
2234 | return rc; |
2235 | } | |
2236 | ||
5a9ee0be JPM |
2237 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2238 | * when we go from standalone to network mode. | |
2239 | */ | |
e05b31f4 | 2240 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2241 | { |
e05b31f4 | 2242 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2243 | const struct bucket_table *tbl; |
2244 | struct rhash_head *pos; | |
2245 | struct tipc_sock *tsk; | |
5a9ee0be | 2246 | struct tipc_msg *msg; |
07f6c4bc | 2247 | int i; |
5a9ee0be | 2248 | |
07f6c4bc | 2249 | rcu_read_lock(); |
e05b31f4 | 2250 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2251 | for (i = 0; i < tbl->size; i++) { |
2252 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2253 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2254 | msg = &tsk->phdr; | |
34747539 YX |
2255 | msg_set_prevnode(msg, tn->own_addr); |
2256 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2257 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2258 | } | |
5a9ee0be | 2259 | } |
07f6c4bc | 2260 | rcu_read_unlock(); |
5a9ee0be JPM |
2261 | } |
2262 | ||
e05b31f4 | 2263 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2264 | { |
e05b31f4 | 2265 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2266 | struct tipc_sock *tsk; |
808d90f9 | 2267 | |
07f6c4bc | 2268 | rcu_read_lock(); |
6cca7289 | 2269 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2270 | if (tsk) |
2271 | sock_hold(&tsk->sk); | |
2272 | rcu_read_unlock(); | |
808d90f9 | 2273 | |
07f6c4bc | 2274 | return tsk; |
808d90f9 JPM |
2275 | } |
2276 | ||
07f6c4bc | 2277 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2278 | { |
e05b31f4 YX |
2279 | struct sock *sk = &tsk->sk; |
2280 | struct net *net = sock_net(sk); | |
2281 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2282 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2283 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2284 | |
07f6c4bc YX |
2285 | while (remaining--) { |
2286 | portid++; | |
2287 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2288 | portid = TIPC_MIN_PORT; | |
2289 | tsk->portid = portid; | |
2290 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2291 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2292 | tsk_rht_params)) | |
07f6c4bc YX |
2293 | return 0; |
2294 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2295 | } |
2296 | ||
07f6c4bc | 2297 | return -1; |
808d90f9 JPM |
2298 | } |
2299 | ||
07f6c4bc | 2300 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2301 | { |
07f6c4bc | 2302 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2303 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2304 | |
6cca7289 | 2305 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2306 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2307 | __sock_put(sk); | |
808d90f9 | 2308 | } |
808d90f9 JPM |
2309 | } |
2310 | ||
6cca7289 HX |
2311 | static const struct rhashtable_params tsk_rht_params = { |
2312 | .nelem_hint = 192, | |
2313 | .head_offset = offsetof(struct tipc_sock, node), | |
2314 | .key_offset = offsetof(struct tipc_sock, portid), | |
2315 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2316 | .max_size = 1048576, |
2317 | .min_size = 256, | |
b5e2c150 | 2318 | .automatic_shrinking = true, |
6cca7289 HX |
2319 | }; |
2320 | ||
e05b31f4 | 2321 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2322 | { |
e05b31f4 | 2323 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2324 | |
2325 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2326 | } |
2327 | ||
e05b31f4 | 2328 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2329 | { |
e05b31f4 YX |
2330 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2331 | ||
07f6c4bc YX |
2332 | /* Wait for socket readers to complete */ |
2333 | synchronize_net(); | |
808d90f9 | 2334 | |
e05b31f4 | 2335 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2336 | } |
2337 | ||
b97bf3fd | 2338 | /** |
247f0f3c | 2339 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2340 | * @sock: socket structure |
2341 | * @lvl: option level | |
2342 | * @opt: option identifier | |
2343 | * @ov: pointer to new option value | |
2344 | * @ol: length of option value | |
c4307285 YH |
2345 | * |
2346 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2347 | * (to ease compatibility). |
c4307285 | 2348 | * |
b97bf3fd PL |
2349 | * Returns 0 on success, errno otherwise |
2350 | */ | |
247f0f3c YX |
2351 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2352 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2353 | { |
0c3141e9 | 2354 | struct sock *sk = sock->sk; |
58ed9442 | 2355 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2356 | u32 value; |
2357 | int res; | |
2358 | ||
c4307285 YH |
2359 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2360 | return 0; | |
b97bf3fd PL |
2361 | if (lvl != SOL_TIPC) |
2362 | return -ENOPROTOOPT; | |
2363 | if (ol < sizeof(value)) | |
2364 | return -EINVAL; | |
2db9983a AS |
2365 | res = get_user(value, (u32 __user *)ov); |
2366 | if (res) | |
b97bf3fd PL |
2367 | return res; |
2368 | ||
0c3141e9 | 2369 | lock_sock(sk); |
c4307285 | 2370 | |
b97bf3fd PL |
2371 | switch (opt) { |
2372 | case TIPC_IMPORTANCE: | |
301bae56 | 2373 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2374 | break; |
2375 | case TIPC_SRC_DROPPABLE: | |
2376 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2377 | tsk_set_unreliable(tsk, value); |
c4307285 | 2378 | else |
b97bf3fd PL |
2379 | res = -ENOPROTOOPT; |
2380 | break; | |
2381 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2382 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2383 | break; |
2384 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2385 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2386 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2387 | break; |
2388 | default: | |
2389 | res = -EINVAL; | |
2390 | } | |
2391 | ||
0c3141e9 AS |
2392 | release_sock(sk); |
2393 | ||
b97bf3fd PL |
2394 | return res; |
2395 | } | |
2396 | ||
2397 | /** | |
247f0f3c | 2398 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2399 | * @sock: socket structure |
2400 | * @lvl: option level | |
2401 | * @opt: option identifier | |
2402 | * @ov: receptacle for option value | |
2403 | * @ol: receptacle for length of option value | |
c4307285 YH |
2404 | * |
2405 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2406 | * (to ease compatibility). |
c4307285 | 2407 | * |
b97bf3fd PL |
2408 | * Returns 0 on success, errno otherwise |
2409 | */ | |
247f0f3c YX |
2410 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2411 | char __user *ov, int __user *ol) | |
b97bf3fd | 2412 | { |
0c3141e9 | 2413 | struct sock *sk = sock->sk; |
58ed9442 | 2414 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2415 | int len; |
b97bf3fd | 2416 | u32 value; |
c4307285 | 2417 | int res; |
b97bf3fd | 2418 | |
c4307285 YH |
2419 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2420 | return put_user(0, ol); | |
b97bf3fd PL |
2421 | if (lvl != SOL_TIPC) |
2422 | return -ENOPROTOOPT; | |
2db9983a AS |
2423 | res = get_user(len, ol); |
2424 | if (res) | |
c4307285 | 2425 | return res; |
b97bf3fd | 2426 | |
0c3141e9 | 2427 | lock_sock(sk); |
b97bf3fd PL |
2428 | |
2429 | switch (opt) { | |
2430 | case TIPC_IMPORTANCE: | |
301bae56 | 2431 | value = tsk_importance(tsk); |
b97bf3fd PL |
2432 | break; |
2433 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2434 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2435 | break; |
2436 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2437 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2438 | break; |
2439 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2440 | value = tsk->conn_timeout; |
0c3141e9 | 2441 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2442 | break; |
0e65967e | 2443 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2444 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2445 | break; |
0e65967e | 2446 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2447 | value = skb_queue_len(&sk->sk_receive_queue); |
2448 | break; | |
b97bf3fd PL |
2449 | default: |
2450 | res = -EINVAL; | |
2451 | } | |
2452 | ||
0c3141e9 AS |
2453 | release_sock(sk); |
2454 | ||
25860c3b PG |
2455 | if (res) |
2456 | return res; /* "get" failed */ | |
b97bf3fd | 2457 | |
25860c3b PG |
2458 | if (len < sizeof(value)) |
2459 | return -EINVAL; | |
2460 | ||
2461 | if (copy_to_user(ov, &value, sizeof(value))) | |
2462 | return -EFAULT; | |
2463 | ||
2464 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2465 | } |
2466 | ||
f2f9800d | 2467 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2468 | { |
f2f9800d | 2469 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2470 | struct tipc_sioc_ln_req lnr; |
2471 | void __user *argp = (void __user *)arg; | |
2472 | ||
2473 | switch (cmd) { | |
2474 | case SIOCGETLINKNAME: | |
2475 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2476 | return -EFAULT; | |
f2f9800d YX |
2477 | if (!tipc_node_get_linkname(sock_net(sk), |
2478 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2479 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2480 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2481 | return -EFAULT; | |
2482 | return 0; | |
2483 | } | |
2484 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2485 | default: |
2486 | return -ENOIOCTLCMD; | |
2487 | } | |
2488 | } | |
2489 | ||
ae86b9e3 BH |
2490 | /* Protocol switches for the various types of TIPC sockets */ |
2491 | ||
bca65eae | 2492 | static const struct proto_ops msg_ops = { |
0e65967e | 2493 | .owner = THIS_MODULE, |
b97bf3fd | 2494 | .family = AF_TIPC, |
247f0f3c YX |
2495 | .release = tipc_release, |
2496 | .bind = tipc_bind, | |
2497 | .connect = tipc_connect, | |
5eee6a6d | 2498 | .socketpair = sock_no_socketpair, |
245f3d34 | 2499 | .accept = sock_no_accept, |
247f0f3c YX |
2500 | .getname = tipc_getname, |
2501 | .poll = tipc_poll, | |
78acb1f9 | 2502 | .ioctl = tipc_ioctl, |
245f3d34 | 2503 | .listen = sock_no_listen, |
247f0f3c YX |
2504 | .shutdown = tipc_shutdown, |
2505 | .setsockopt = tipc_setsockopt, | |
2506 | .getsockopt = tipc_getsockopt, | |
2507 | .sendmsg = tipc_sendmsg, | |
2508 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2509 | .mmap = sock_no_mmap, |
2510 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2511 | }; |
2512 | ||
bca65eae | 2513 | static const struct proto_ops packet_ops = { |
0e65967e | 2514 | .owner = THIS_MODULE, |
b97bf3fd | 2515 | .family = AF_TIPC, |
247f0f3c YX |
2516 | .release = tipc_release, |
2517 | .bind = tipc_bind, | |
2518 | .connect = tipc_connect, | |
5eee6a6d | 2519 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2520 | .accept = tipc_accept, |
2521 | .getname = tipc_getname, | |
2522 | .poll = tipc_poll, | |
78acb1f9 | 2523 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2524 | .listen = tipc_listen, |
2525 | .shutdown = tipc_shutdown, | |
2526 | .setsockopt = tipc_setsockopt, | |
2527 | .getsockopt = tipc_getsockopt, | |
2528 | .sendmsg = tipc_send_packet, | |
2529 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2530 | .mmap = sock_no_mmap, |
2531 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2532 | }; |
2533 | ||
bca65eae | 2534 | static const struct proto_ops stream_ops = { |
0e65967e | 2535 | .owner = THIS_MODULE, |
b97bf3fd | 2536 | .family = AF_TIPC, |
247f0f3c YX |
2537 | .release = tipc_release, |
2538 | .bind = tipc_bind, | |
2539 | .connect = tipc_connect, | |
5eee6a6d | 2540 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2541 | .accept = tipc_accept, |
2542 | .getname = tipc_getname, | |
2543 | .poll = tipc_poll, | |
78acb1f9 | 2544 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2545 | .listen = tipc_listen, |
2546 | .shutdown = tipc_shutdown, | |
2547 | .setsockopt = tipc_setsockopt, | |
2548 | .getsockopt = tipc_getsockopt, | |
2549 | .sendmsg = tipc_send_stream, | |
2550 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2551 | .mmap = sock_no_mmap, |
2552 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2553 | }; |
2554 | ||
bca65eae | 2555 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2556 | .owner = THIS_MODULE, |
b97bf3fd | 2557 | .family = AF_TIPC, |
c5fa7b3c | 2558 | .create = tipc_sk_create |
b97bf3fd PL |
2559 | }; |
2560 | ||
2561 | static struct proto tipc_proto = { | |
2562 | .name = "TIPC", | |
2563 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2564 | .obj_size = sizeof(struct tipc_sock), |
2565 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2566 | }; |
2567 | ||
2568 | /** | |
4323add6 | 2569 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2570 | * |
b97bf3fd PL |
2571 | * Returns 0 on success, errno otherwise |
2572 | */ | |
4323add6 | 2573 | int tipc_socket_init(void) |
b97bf3fd PL |
2574 | { |
2575 | int res; | |
2576 | ||
c4307285 | 2577 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2578 | if (res) { |
2cf8aa19 | 2579 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2580 | goto out; |
2581 | } | |
2582 | ||
2583 | res = sock_register(&tipc_family_ops); | |
2584 | if (res) { | |
2cf8aa19 | 2585 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2586 | proto_unregister(&tipc_proto); |
2587 | goto out; | |
2588 | } | |
b97bf3fd PL |
2589 | out: |
2590 | return res; | |
2591 | } | |
2592 | ||
2593 | /** | |
4323add6 | 2594 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2595 | */ |
4323add6 | 2596 | void tipc_socket_stop(void) |
b97bf3fd | 2597 | { |
b97bf3fd PL |
2598 | sock_unregister(tipc_family_ops.family); |
2599 | proto_unregister(&tipc_proto); | |
2600 | } | |
34b78a12 RA |
2601 | |
2602 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2603 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2604 | { |
2605 | u32 peer_node; | |
2606 | u32 peer_port; | |
2607 | struct nlattr *nest; | |
2608 | ||
2609 | peer_node = tsk_peer_node(tsk); | |
2610 | peer_port = tsk_peer_port(tsk); | |
2611 | ||
2612 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2613 | ||
2614 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2615 | goto msg_full; | |
2616 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2617 | goto msg_full; | |
2618 | ||
2619 | if (tsk->conn_type != 0) { | |
2620 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2621 | goto msg_full; | |
2622 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2623 | goto msg_full; | |
2624 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2625 | goto msg_full; | |
2626 | } | |
2627 | nla_nest_end(skb, nest); | |
2628 | ||
2629 | return 0; | |
2630 | ||
2631 | msg_full: | |
2632 | nla_nest_cancel(skb, nest); | |
2633 | ||
2634 | return -EMSGSIZE; | |
2635 | } | |
2636 | ||
2637 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2638 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2639 | struct tipc_sock *tsk) | |
34b78a12 RA |
2640 | { |
2641 | int err; | |
2642 | void *hdr; | |
2643 | struct nlattr *attrs; | |
34747539 YX |
2644 | struct net *net = sock_net(skb->sk); |
2645 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
34b78a12 RA |
2646 | |
2647 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2648 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2649 | if (!hdr) |
2650 | goto msg_cancel; | |
2651 | ||
2652 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2653 | if (!attrs) | |
2654 | goto genlmsg_cancel; | |
07f6c4bc | 2655 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2656 | goto attr_msg_cancel; |
34747539 | 2657 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2658 | goto attr_msg_cancel; |
2659 | ||
2660 | if (tsk->connected) { | |
2661 | err = __tipc_nl_add_sk_con(skb, tsk); | |
2662 | if (err) | |
2663 | goto attr_msg_cancel; | |
2664 | } else if (!list_empty(&tsk->publications)) { | |
2665 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2666 | goto attr_msg_cancel; | |
2667 | } | |
2668 | nla_nest_end(skb, attrs); | |
2669 | genlmsg_end(skb, hdr); | |
2670 | ||
2671 | return 0; | |
2672 | ||
2673 | attr_msg_cancel: | |
2674 | nla_nest_cancel(skb, attrs); | |
2675 | genlmsg_cancel: | |
2676 | genlmsg_cancel(skb, hdr); | |
2677 | msg_cancel: | |
2678 | return -EMSGSIZE; | |
2679 | } | |
2680 | ||
2681 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2682 | { | |
2683 | int err; | |
2684 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2685 | const struct bucket_table *tbl; |
2686 | struct rhash_head *pos; | |
e05b31f4 YX |
2687 | struct net *net = sock_net(skb->sk); |
2688 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2689 | u32 tbl_id = cb->args[0]; |
2690 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2691 | |
07f6c4bc | 2692 | rcu_read_lock(); |
e05b31f4 | 2693 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2694 | for (; tbl_id < tbl->size; tbl_id++) { |
2695 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2696 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2697 | if (prev_portid && prev_portid != tsk->portid) { |
2698 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2699 | continue; | |
2700 | } | |
2701 | ||
07f6c4bc | 2702 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2703 | if (err) { |
2704 | prev_portid = tsk->portid; | |
2705 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2706 | goto out; | |
2707 | } | |
2708 | prev_portid = 0; | |
07f6c4bc | 2709 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2710 | } |
34b78a12 | 2711 | } |
d6e164e3 | 2712 | out: |
07f6c4bc | 2713 | rcu_read_unlock(); |
d6e164e3 RA |
2714 | cb->args[0] = tbl_id; |
2715 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2716 | |
2717 | return skb->len; | |
2718 | } | |
1a1a143d RA |
2719 | |
2720 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2721 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2722 | struct netlink_callback *cb, | |
2723 | struct publication *publ) | |
1a1a143d RA |
2724 | { |
2725 | void *hdr; | |
2726 | struct nlattr *attrs; | |
2727 | ||
2728 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2729 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2730 | if (!hdr) |
2731 | goto msg_cancel; | |
2732 | ||
2733 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2734 | if (!attrs) | |
2735 | goto genlmsg_cancel; | |
2736 | ||
2737 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2738 | goto attr_msg_cancel; | |
2739 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2740 | goto attr_msg_cancel; | |
2741 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2742 | goto attr_msg_cancel; | |
2743 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2744 | goto attr_msg_cancel; | |
2745 | ||
2746 | nla_nest_end(skb, attrs); | |
2747 | genlmsg_end(skb, hdr); | |
2748 | ||
2749 | return 0; | |
2750 | ||
2751 | attr_msg_cancel: | |
2752 | nla_nest_cancel(skb, attrs); | |
2753 | genlmsg_cancel: | |
2754 | genlmsg_cancel(skb, hdr); | |
2755 | msg_cancel: | |
2756 | return -EMSGSIZE; | |
2757 | } | |
2758 | ||
2759 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2760 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2761 | struct netlink_callback *cb, | |
2762 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2763 | { |
2764 | int err; | |
2765 | struct publication *p; | |
2766 | ||
2767 | if (*last_publ) { | |
2768 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2769 | if (p->key == *last_publ) | |
2770 | break; | |
2771 | } | |
2772 | if (p->key != *last_publ) { | |
2773 | /* We never set seq or call nl_dump_check_consistent() | |
2774 | * this means that setting prev_seq here will cause the | |
2775 | * consistence check to fail in the netlink callback | |
2776 | * handler. Resulting in the last NLMSG_DONE message | |
2777 | * having the NLM_F_DUMP_INTR flag set. | |
2778 | */ | |
2779 | cb->prev_seq = 1; | |
2780 | *last_publ = 0; | |
2781 | return -EPIPE; | |
2782 | } | |
2783 | } else { | |
2784 | p = list_first_entry(&tsk->publications, struct publication, | |
2785 | pport_list); | |
2786 | } | |
2787 | ||
2788 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2789 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2790 | if (err) { | |
2791 | *last_publ = p->key; | |
2792 | return err; | |
2793 | } | |
2794 | } | |
2795 | *last_publ = 0; | |
2796 | ||
2797 | return 0; | |
2798 | } | |
2799 | ||
2800 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2801 | { | |
2802 | int err; | |
07f6c4bc | 2803 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2804 | u32 last_publ = cb->args[1]; |
2805 | u32 done = cb->args[2]; | |
e05b31f4 | 2806 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2807 | struct tipc_sock *tsk; |
2808 | ||
07f6c4bc | 2809 | if (!tsk_portid) { |
1a1a143d RA |
2810 | struct nlattr **attrs; |
2811 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2812 | ||
2813 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2814 | if (err) | |
2815 | return err; | |
2816 | ||
2817 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, | |
2818 | attrs[TIPC_NLA_SOCK], | |
2819 | tipc_nl_sock_policy); | |
2820 | if (err) | |
2821 | return err; | |
2822 | ||
2823 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2824 | return -EINVAL; | |
2825 | ||
07f6c4bc | 2826 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2827 | } |
2828 | ||
2829 | if (done) | |
2830 | return 0; | |
2831 | ||
e05b31f4 | 2832 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2833 | if (!tsk) |
2834 | return -EINVAL; | |
2835 | ||
2836 | lock_sock(&tsk->sk); | |
2837 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2838 | if (!err) | |
2839 | done = 1; | |
2840 | release_sock(&tsk->sk); | |
07f6c4bc | 2841 | sock_put(&tsk->sk); |
1a1a143d | 2842 | |
07f6c4bc | 2843 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2844 | cb->args[1] = last_publ; |
2845 | cb->args[2] = done; | |
2846 | ||
2847 | return skb->len; | |
2848 | } |