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); |
247f0f3c YX |
108 | static int tipc_release(struct socket *sock); |
109 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); | |
0abd8ff2 | 110 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
f2f2a96a | 111 | static void tipc_sk_timeout(unsigned long data); |
301bae56 | 112 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae | 113 | struct tipc_name_seq const *seq); |
301bae56 | 114 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae | 115 | struct tipc_name_seq const *seq); |
e05b31f4 | 116 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
07f6c4bc YX |
117 | static int tipc_sk_insert(struct tipc_sock *tsk); |
118 | static void tipc_sk_remove(struct tipc_sock *tsk); | |
39a0295f YX |
119 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, |
120 | size_t dsz); | |
121 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); | |
b97bf3fd | 122 | |
bca65eae FW |
123 | static const struct proto_ops packet_ops; |
124 | static const struct proto_ops stream_ops; | |
125 | static const struct proto_ops msg_ops; | |
b97bf3fd PL |
126 | static struct proto tipc_proto; |
127 | ||
1a1a143d RA |
128 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
129 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, | |
130 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, | |
131 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, | |
132 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, | |
133 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } | |
134 | }; | |
135 | ||
6cca7289 HX |
136 | static const struct rhashtable_params tsk_rht_params; |
137 | ||
c4307285 | 138 | /* |
0c3141e9 AS |
139 | * Revised TIPC socket locking policy: |
140 | * | |
141 | * Most socket operations take the standard socket lock when they start | |
142 | * and hold it until they finish (or until they need to sleep). Acquiring | |
143 | * this lock grants the owner exclusive access to the fields of the socket | |
144 | * data structures, with the exception of the backlog queue. A few socket | |
145 | * operations can be done without taking the socket lock because they only | |
146 | * read socket information that never changes during the life of the socket. | |
147 | * | |
148 | * Socket operations may acquire the lock for the associated TIPC port if they | |
149 | * need to perform an operation on the port. If any routine needs to acquire | |
150 | * both the socket lock and the port lock it must take the socket lock first | |
151 | * to avoid the risk of deadlock. | |
152 | * | |
153 | * The dispatcher handling incoming messages cannot grab the socket lock in | |
154 | * the standard fashion, since invoked it runs at the BH level and cannot block. | |
155 | * Instead, it checks to see if the socket lock is currently owned by someone, | |
156 | * and either handles the message itself or adds it to the socket's backlog | |
157 | * queue; in the latter case the queued message is processed once the process | |
158 | * owning the socket lock releases it. | |
159 | * | |
160 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes | |
161 | * the problem of a blocked socket operation preventing any other operations | |
162 | * from occurring. However, applications must be careful if they have | |
163 | * multiple threads trying to send (or receive) on the same socket, as these | |
164 | * operations might interfere with each other. For example, doing a connect | |
165 | * and a receive at the same time might allow the receive to consume the | |
166 | * ACK message meant for the connect. While additional work could be done | |
167 | * to try and overcome this, it doesn't seem to be worthwhile at the present. | |
168 | * | |
169 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures | |
170 | * that another operation that must be performed in a non-blocking manner is | |
171 | * not delayed for very long because the lock has already been taken. | |
172 | * | |
173 | * NOTE: This code assumes that certain fields of a port/socket pair are | |
174 | * constant over its lifetime; such fields can be examined without taking | |
175 | * the socket lock and/or port lock, and do not need to be re-read even | |
176 | * after resuming processing after waiting. These fields include: | |
177 | * - socket type | |
178 | * - pointer to socket sk structure (aka tipc_sock structure) | |
179 | * - pointer to port structure | |
180 | * - port reference | |
181 | */ | |
182 | ||
c5898636 JPM |
183 | static u32 tsk_own_node(struct tipc_sock *tsk) |
184 | { | |
185 | return msg_prevnode(&tsk->phdr); | |
186 | } | |
187 | ||
301bae56 | 188 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
2e84c60b | 189 | { |
301bae56 | 190 | return msg_destnode(&tsk->phdr); |
2e84c60b JPM |
191 | } |
192 | ||
301bae56 | 193 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
2e84c60b | 194 | { |
301bae56 | 195 | return msg_destport(&tsk->phdr); |
2e84c60b JPM |
196 | } |
197 | ||
301bae56 | 198 | static bool tsk_unreliable(struct tipc_sock *tsk) |
2e84c60b | 199 | { |
301bae56 | 200 | return msg_src_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
201 | } |
202 | ||
301bae56 | 203 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
2e84c60b | 204 | { |
301bae56 | 205 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
2e84c60b JPM |
206 | } |
207 | ||
301bae56 | 208 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
2e84c60b | 209 | { |
301bae56 | 210 | return msg_dest_droppable(&tsk->phdr) != 0; |
2e84c60b JPM |
211 | } |
212 | ||
301bae56 | 213 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
2e84c60b | 214 | { |
301bae56 | 215 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
2e84c60b JPM |
216 | } |
217 | ||
301bae56 | 218 | static int tsk_importance(struct tipc_sock *tsk) |
2e84c60b | 219 | { |
301bae56 | 220 | return msg_importance(&tsk->phdr); |
2e84c60b JPM |
221 | } |
222 | ||
301bae56 | 223 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
2e84c60b JPM |
224 | { |
225 | if (imp > TIPC_CRITICAL_IMPORTANCE) | |
226 | return -EINVAL; | |
301bae56 | 227 | msg_set_importance(&tsk->phdr, (u32)imp); |
2e84c60b JPM |
228 | return 0; |
229 | } | |
8826cde6 | 230 | |
301bae56 JPM |
231 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
232 | { | |
233 | return container_of(sk, struct tipc_sock, sk); | |
234 | } | |
235 | ||
236 | static int tsk_conn_cong(struct tipc_sock *tsk) | |
237 | { | |
238 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; | |
239 | } | |
240 | ||
0c3141e9 | 241 | /** |
2e84c60b | 242 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
0c3141e9 AS |
243 | * |
244 | * Caller must hold socket lock | |
b97bf3fd | 245 | */ |
2e84c60b | 246 | static void tsk_advance_rx_queue(struct sock *sk) |
b97bf3fd | 247 | { |
5f6d9123 | 248 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
b97bf3fd PL |
249 | } |
250 | ||
b97bf3fd | 251 | /** |
2e84c60b | 252 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
0c3141e9 AS |
253 | * |
254 | * Caller must hold socket lock | |
b97bf3fd | 255 | */ |
2e84c60b | 256 | static void tsk_rej_rx_queue(struct sock *sk) |
b97bf3fd | 257 | { |
a6ca1094 | 258 | struct sk_buff *skb; |
8db1bae3 | 259 | u32 dnode; |
c5898636 | 260 | u32 own_node = tsk_own_node(tipc_sk(sk)); |
0c3141e9 | 261 | |
a6ca1094 | 262 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) { |
c5898636 JPM |
263 | if (tipc_msg_reverse(own_node, skb, &dnode, TIPC_ERR_NO_PORT)) |
264 | tipc_link_xmit_skb(sock_net(sk), skb, dnode, 0); | |
8db1bae3 | 265 | } |
b97bf3fd PL |
266 | } |
267 | ||
2e84c60b | 268 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
0fc87aae JPM |
269 | * |
270 | * Handles cases where the node's network address has changed from | |
271 | * the default of <0.0.0> to its configured setting. | |
272 | */ | |
2e84c60b | 273 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
0fc87aae | 274 | { |
34747539 | 275 | struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id); |
301bae56 | 276 | u32 peer_port = tsk_peer_port(tsk); |
0fc87aae JPM |
277 | u32 orig_node; |
278 | u32 peer_node; | |
279 | ||
301bae56 | 280 | if (unlikely(!tsk->connected)) |
0fc87aae JPM |
281 | return false; |
282 | ||
283 | if (unlikely(msg_origport(msg) != peer_port)) | |
284 | return false; | |
285 | ||
286 | orig_node = msg_orignode(msg); | |
301bae56 | 287 | peer_node = tsk_peer_node(tsk); |
0fc87aae JPM |
288 | |
289 | if (likely(orig_node == peer_node)) | |
290 | return true; | |
291 | ||
34747539 | 292 | if (!orig_node && (peer_node == tn->own_addr)) |
0fc87aae JPM |
293 | return true; |
294 | ||
34747539 | 295 | if (!peer_node && (orig_node == tn->own_addr)) |
0fc87aae JPM |
296 | return true; |
297 | ||
298 | return false; | |
299 | } | |
300 | ||
b97bf3fd | 301 | /** |
c5fa7b3c | 302 | * tipc_sk_create - create a TIPC socket |
0c3141e9 | 303 | * @net: network namespace (must be default network) |
b97bf3fd PL |
304 | * @sock: pre-allocated socket structure |
305 | * @protocol: protocol indicator (must be 0) | |
3f378b68 | 306 | * @kern: caused by kernel or by userspace? |
c4307285 | 307 | * |
0c3141e9 AS |
308 | * This routine creates additional data structures used by the TIPC socket, |
309 | * initializes them, and links them together. | |
b97bf3fd PL |
310 | * |
311 | * Returns 0 on success, errno otherwise | |
312 | */ | |
58ed9442 JPM |
313 | static int tipc_sk_create(struct net *net, struct socket *sock, |
314 | int protocol, int kern) | |
b97bf3fd | 315 | { |
c5898636 | 316 | struct tipc_net *tn; |
0c3141e9 AS |
317 | const struct proto_ops *ops; |
318 | socket_state state; | |
b97bf3fd | 319 | struct sock *sk; |
58ed9442 | 320 | struct tipc_sock *tsk; |
5b8fa7ce | 321 | struct tipc_msg *msg; |
0c3141e9 AS |
322 | |
323 | /* Validate arguments */ | |
b97bf3fd PL |
324 | if (unlikely(protocol != 0)) |
325 | return -EPROTONOSUPPORT; | |
326 | ||
b97bf3fd PL |
327 | switch (sock->type) { |
328 | case SOCK_STREAM: | |
0c3141e9 AS |
329 | ops = &stream_ops; |
330 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
331 | break; |
332 | case SOCK_SEQPACKET: | |
0c3141e9 AS |
333 | ops = &packet_ops; |
334 | state = SS_UNCONNECTED; | |
b97bf3fd PL |
335 | break; |
336 | case SOCK_DGRAM: | |
b97bf3fd | 337 | case SOCK_RDM: |
0c3141e9 AS |
338 | ops = &msg_ops; |
339 | state = SS_READY; | |
b97bf3fd | 340 | break; |
49978651 | 341 | default: |
49978651 | 342 | return -EPROTOTYPE; |
b97bf3fd PL |
343 | } |
344 | ||
0c3141e9 | 345 | /* Allocate socket's protocol area */ |
11aa9c28 | 346 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
0c3141e9 | 347 | if (sk == NULL) |
b97bf3fd | 348 | return -ENOMEM; |
b97bf3fd | 349 | |
58ed9442 | 350 | tsk = tipc_sk(sk); |
301bae56 | 351 | tsk->max_pkt = MAX_PKT_DEFAULT; |
301bae56 JPM |
352 | INIT_LIST_HEAD(&tsk->publications); |
353 | msg = &tsk->phdr; | |
c5898636 JPM |
354 | tn = net_generic(sock_net(sk), tipc_net_id); |
355 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, | |
5b8fa7ce | 356 | NAMED_H_SIZE, 0); |
b97bf3fd | 357 | |
0c3141e9 | 358 | /* Finish initializing socket data structures */ |
0c3141e9 AS |
359 | sock->ops = ops; |
360 | sock->state = state; | |
0c3141e9 | 361 | sock_init_data(sock, sk); |
07f6c4bc YX |
362 | if (tipc_sk_insert(tsk)) { |
363 | pr_warn("Socket create failed; port numbrer exhausted\n"); | |
364 | return -EINVAL; | |
365 | } | |
366 | msg_set_origport(msg, tsk->portid); | |
3721e9c7 | 367 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
4f4482dc | 368 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
cc79dd1b | 369 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
f288bef4 YX |
370 | sk->sk_data_ready = tipc_data_ready; |
371 | sk->sk_write_space = tipc_write_space; | |
4f4482dc | 372 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
60120526 | 373 | tsk->sent_unacked = 0; |
4f4482dc | 374 | atomic_set(&tsk->dupl_rcvcnt, 0); |
7ef43eba | 375 | |
0c3141e9 | 376 | if (sock->state == SS_READY) { |
301bae56 | 377 | tsk_set_unreturnable(tsk, true); |
0c3141e9 | 378 | if (sock->type == SOCK_DGRAM) |
301bae56 | 379 | tsk_set_unreliable(tsk, true); |
0c3141e9 | 380 | } |
b97bf3fd PL |
381 | return 0; |
382 | } | |
383 | ||
07f6c4bc YX |
384 | static void tipc_sk_callback(struct rcu_head *head) |
385 | { | |
386 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); | |
387 | ||
388 | sock_put(&tsk->sk); | |
389 | } | |
390 | ||
b97bf3fd | 391 | /** |
247f0f3c | 392 | * tipc_release - destroy a TIPC socket |
b97bf3fd PL |
393 | * @sock: socket to destroy |
394 | * | |
395 | * This routine cleans up any messages that are still queued on the socket. | |
396 | * For DGRAM and RDM socket types, all queued messages are rejected. | |
397 | * For SEQPACKET and STREAM socket types, the first message is rejected | |
398 | * and any others are discarded. (If the first message on a STREAM socket | |
399 | * is partially-read, it is discarded and the next one is rejected instead.) | |
c4307285 | 400 | * |
b97bf3fd PL |
401 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
402 | * are returned or discarded according to the "destination droppable" setting | |
403 | * specified for the message by the sender. | |
404 | * | |
405 | * Returns 0 on success, errno otherwise | |
406 | */ | |
247f0f3c | 407 | static int tipc_release(struct socket *sock) |
b97bf3fd | 408 | { |
b97bf3fd | 409 | struct sock *sk = sock->sk; |
357c4774 | 410 | struct net *net; |
58ed9442 | 411 | struct tipc_sock *tsk; |
a6ca1094 | 412 | struct sk_buff *skb; |
1ea23a21 | 413 | u32 dnode; |
b97bf3fd | 414 | |
0c3141e9 AS |
415 | /* |
416 | * Exit if socket isn't fully initialized (occurs when a failed accept() | |
417 | * releases a pre-allocated child socket that was never used) | |
418 | */ | |
0c3141e9 | 419 | if (sk == NULL) |
b97bf3fd | 420 | return 0; |
c4307285 | 421 | |
357c4774 | 422 | net = sock_net(sk); |
58ed9442 | 423 | tsk = tipc_sk(sk); |
0c3141e9 AS |
424 | lock_sock(sk); |
425 | ||
426 | /* | |
427 | * Reject all unreceived messages, except on an active connection | |
428 | * (which disconnects locally & sends a 'FIN+' to peer) | |
429 | */ | |
301bae56 | 430 | dnode = tsk_peer_node(tsk); |
b97bf3fd | 431 | while (sock->state != SS_DISCONNECTING) { |
a6ca1094 YX |
432 | skb = __skb_dequeue(&sk->sk_receive_queue); |
433 | if (skb == NULL) | |
b97bf3fd | 434 | break; |
a6ca1094 YX |
435 | if (TIPC_SKB_CB(skb)->handle != NULL) |
436 | kfree_skb(skb); | |
0c3141e9 AS |
437 | else { |
438 | if ((sock->state == SS_CONNECTING) || | |
439 | (sock->state == SS_CONNECTED)) { | |
440 | sock->state = SS_DISCONNECTING; | |
301bae56 | 441 | tsk->connected = 0; |
f2f9800d | 442 | tipc_node_remove_conn(net, dnode, tsk->portid); |
0c3141e9 | 443 | } |
c5898636 | 444 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
34747539 | 445 | TIPC_ERR_NO_PORT)) |
f2f9800d | 446 | tipc_link_xmit_skb(net, skb, dnode, 0); |
0c3141e9 | 447 | } |
b97bf3fd PL |
448 | } |
449 | ||
301bae56 | 450 | tipc_sk_withdraw(tsk, 0, NULL); |
1ea23a21 | 451 | sk_stop_timer(sk, &sk->sk_timer); |
07f6c4bc | 452 | tipc_sk_remove(tsk); |
301bae56 | 453 | if (tsk->connected) { |
c5898636 | 454 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
34747539 | 455 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
c5898636 | 456 | tsk_own_node(tsk), tsk_peer_port(tsk), |
07f6c4bc | 457 | tsk->portid, TIPC_ERR_NO_PORT); |
a6ca1094 | 458 | if (skb) |
f2f9800d YX |
459 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
460 | tipc_node_remove_conn(net, dnode, tsk->portid); | |
5b8fa7ce | 461 | } |
b97bf3fd | 462 | |
0c3141e9 | 463 | /* Discard any remaining (connection-based) messages in receive queue */ |
57467e56 | 464 | __skb_queue_purge(&sk->sk_receive_queue); |
b97bf3fd | 465 | |
0c3141e9 | 466 | /* Reject any messages that accumulated in backlog queue */ |
0c3141e9 AS |
467 | sock->state = SS_DISCONNECTING; |
468 | release_sock(sk); | |
07f6c4bc YX |
469 | |
470 | call_rcu(&tsk->rcu, tipc_sk_callback); | |
0c3141e9 | 471 | sock->sk = NULL; |
b97bf3fd | 472 | |
065d7e39 | 473 | return 0; |
b97bf3fd PL |
474 | } |
475 | ||
476 | /** | |
247f0f3c | 477 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
b97bf3fd PL |
478 | * @sock: socket structure |
479 | * @uaddr: socket address describing name(s) and desired operation | |
480 | * @uaddr_len: size of socket address data structure | |
c4307285 | 481 | * |
b97bf3fd PL |
482 | * Name and name sequence binding is indicated using a positive scope value; |
483 | * a negative scope value unbinds the specified name. Specifying no name | |
484 | * (i.e. a socket address length of 0) unbinds all names from the socket. | |
c4307285 | 485 | * |
b97bf3fd | 486 | * Returns 0 on success, errno otherwise |
0c3141e9 AS |
487 | * |
488 | * NOTE: This routine doesn't need to take the socket lock since it doesn't | |
489 | * access any non-constant socket information. | |
b97bf3fd | 490 | */ |
247f0f3c YX |
491 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
492 | int uaddr_len) | |
b97bf3fd | 493 | { |
84602761 | 494 | struct sock *sk = sock->sk; |
b97bf3fd | 495 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 496 | struct tipc_sock *tsk = tipc_sk(sk); |
84602761 | 497 | int res = -EINVAL; |
b97bf3fd | 498 | |
84602761 YX |
499 | lock_sock(sk); |
500 | if (unlikely(!uaddr_len)) { | |
301bae56 | 501 | res = tipc_sk_withdraw(tsk, 0, NULL); |
84602761 YX |
502 | goto exit; |
503 | } | |
c4307285 | 504 | |
84602761 YX |
505 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
506 | res = -EINVAL; | |
507 | goto exit; | |
508 | } | |
509 | if (addr->family != AF_TIPC) { | |
510 | res = -EAFNOSUPPORT; | |
511 | goto exit; | |
512 | } | |
b97bf3fd | 513 | |
b97bf3fd PL |
514 | if (addr->addrtype == TIPC_ADDR_NAME) |
515 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; | |
84602761 YX |
516 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
517 | res = -EAFNOSUPPORT; | |
518 | goto exit; | |
519 | } | |
c4307285 | 520 | |
13a2e898 | 521 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
7d0ab17b | 522 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
84602761 YX |
523 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
524 | res = -EACCES; | |
525 | goto exit; | |
526 | } | |
c422f1bd | 527 | |
84602761 | 528 | res = (addr->scope > 0) ? |
301bae56 JPM |
529 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
530 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); | |
84602761 YX |
531 | exit: |
532 | release_sock(sk); | |
533 | return res; | |
b97bf3fd PL |
534 | } |
535 | ||
c4307285 | 536 | /** |
247f0f3c | 537 | * tipc_getname - get port ID of socket or peer socket |
b97bf3fd PL |
538 | * @sock: socket structure |
539 | * @uaddr: area for returned socket address | |
540 | * @uaddr_len: area for returned length of socket address | |
2da59918 | 541 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
c4307285 | 542 | * |
b97bf3fd | 543 | * Returns 0 on success, errno otherwise |
0c3141e9 | 544 | * |
2da59918 AS |
545 | * NOTE: This routine doesn't need to take the socket lock since it only |
546 | * accesses socket information that is unchanging (or which changes in | |
0e65967e | 547 | * a completely predictable manner). |
b97bf3fd | 548 | */ |
247f0f3c YX |
549 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
550 | int *uaddr_len, int peer) | |
b97bf3fd | 551 | { |
b97bf3fd | 552 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
58ed9442 | 553 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
34747539 | 554 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
b97bf3fd | 555 | |
88f8a5e3 | 556 | memset(addr, 0, sizeof(*addr)); |
0c3141e9 | 557 | if (peer) { |
2da59918 AS |
558 | if ((sock->state != SS_CONNECTED) && |
559 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) | |
560 | return -ENOTCONN; | |
301bae56 JPM |
561 | addr->addr.id.ref = tsk_peer_port(tsk); |
562 | addr->addr.id.node = tsk_peer_node(tsk); | |
0c3141e9 | 563 | } else { |
07f6c4bc | 564 | addr->addr.id.ref = tsk->portid; |
34747539 | 565 | addr->addr.id.node = tn->own_addr; |
0c3141e9 | 566 | } |
b97bf3fd PL |
567 | |
568 | *uaddr_len = sizeof(*addr); | |
569 | addr->addrtype = TIPC_ADDR_ID; | |
570 | addr->family = AF_TIPC; | |
571 | addr->scope = 0; | |
b97bf3fd PL |
572 | addr->addr.name.domain = 0; |
573 | ||
0c3141e9 | 574 | return 0; |
b97bf3fd PL |
575 | } |
576 | ||
577 | /** | |
247f0f3c | 578 | * tipc_poll - read and possibly block on pollmask |
b97bf3fd PL |
579 | * @file: file structure associated with the socket |
580 | * @sock: socket for which to calculate the poll bits | |
581 | * @wait: ??? | |
582 | * | |
9b674e82 AS |
583 | * Returns pollmask value |
584 | * | |
585 | * COMMENTARY: | |
586 | * It appears that the usual socket locking mechanisms are not useful here | |
587 | * since the pollmask info is potentially out-of-date the moment this routine | |
588 | * exits. TCP and other protocols seem to rely on higher level poll routines | |
589 | * to handle any preventable race conditions, so TIPC will do the same ... | |
590 | * | |
591 | * TIPC sets the returned events as follows: | |
f662c070 AS |
592 | * |
593 | * socket state flags set | |
594 | * ------------ --------- | |
595 | * unconnected no read flags | |
c4fc298a | 596 | * POLLOUT if port is not congested |
f662c070 AS |
597 | * |
598 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue | |
599 | * no write flags | |
600 | * | |
601 | * connected POLLIN/POLLRDNORM if data in rx queue | |
602 | * POLLOUT if port is not congested | |
603 | * | |
604 | * disconnecting POLLIN/POLLRDNORM/POLLHUP | |
605 | * no write flags | |
606 | * | |
607 | * listening POLLIN if SYN in rx queue | |
608 | * no write flags | |
609 | * | |
610 | * ready POLLIN/POLLRDNORM if data in rx queue | |
611 | * [connectionless] POLLOUT (since port cannot be congested) | |
612 | * | |
613 | * IMPORTANT: The fact that a read or write operation is indicated does NOT | |
614 | * imply that the operation will succeed, merely that it should be performed | |
615 | * and will not block. | |
b97bf3fd | 616 | */ |
247f0f3c YX |
617 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
618 | poll_table *wait) | |
b97bf3fd | 619 | { |
9b674e82 | 620 | struct sock *sk = sock->sk; |
58ed9442 | 621 | struct tipc_sock *tsk = tipc_sk(sk); |
f662c070 | 622 | u32 mask = 0; |
9b674e82 | 623 | |
f288bef4 | 624 | sock_poll_wait(file, sk_sleep(sk), wait); |
9b674e82 | 625 | |
f662c070 | 626 | switch ((int)sock->state) { |
c4fc298a | 627 | case SS_UNCONNECTED: |
60120526 | 628 | if (!tsk->link_cong) |
c4fc298a EH |
629 | mask |= POLLOUT; |
630 | break; | |
f662c070 AS |
631 | case SS_READY: |
632 | case SS_CONNECTED: | |
301bae56 | 633 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
f662c070 AS |
634 | mask |= POLLOUT; |
635 | /* fall thru' */ | |
636 | case SS_CONNECTING: | |
637 | case SS_LISTENING: | |
638 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
639 | mask |= (POLLIN | POLLRDNORM); | |
640 | break; | |
641 | case SS_DISCONNECTING: | |
642 | mask = (POLLIN | POLLRDNORM | POLLHUP); | |
643 | break; | |
644 | } | |
9b674e82 AS |
645 | |
646 | return mask; | |
b97bf3fd PL |
647 | } |
648 | ||
0abd8ff2 JPM |
649 | /** |
650 | * tipc_sendmcast - send multicast message | |
651 | * @sock: socket structure | |
652 | * @seq: destination address | |
562640f3 | 653 | * @msg: message to send |
0abd8ff2 JPM |
654 | * @dsz: total length of message data |
655 | * @timeo: timeout to wait for wakeup | |
656 | * | |
657 | * Called from function tipc_sendmsg(), which has done all sanity checks | |
658 | * Returns the number of bytes sent on success, or errno | |
659 | */ | |
660 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, | |
562640f3 | 661 | struct msghdr *msg, size_t dsz, long timeo) |
0abd8ff2 JPM |
662 | { |
663 | struct sock *sk = sock->sk; | |
c5898636 | 664 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 665 | struct net *net = sock_net(sk); |
c5898636 | 666 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 667 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
f25dcc76 | 668 | struct iov_iter save = msg->msg_iter; |
0abd8ff2 JPM |
669 | uint mtu; |
670 | int rc; | |
671 | ||
672 | msg_set_type(mhdr, TIPC_MCAST_MSG); | |
673 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); | |
674 | msg_set_destport(mhdr, 0); | |
675 | msg_set_destnode(mhdr, 0); | |
676 | msg_set_nametype(mhdr, seq->type); | |
677 | msg_set_namelower(mhdr, seq->lower); | |
678 | msg_set_nameupper(mhdr, seq->upper); | |
679 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); | |
680 | ||
681 | new_mtu: | |
682 | mtu = tipc_bclink_get_mtu(); | |
94153e36 | 683 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, pktchain); |
0abd8ff2 JPM |
684 | if (unlikely(rc < 0)) |
685 | return rc; | |
686 | ||
687 | do { | |
94153e36 | 688 | rc = tipc_bclink_xmit(net, pktchain); |
0abd8ff2 JPM |
689 | if (likely(rc >= 0)) { |
690 | rc = dsz; | |
691 | break; | |
692 | } | |
f25dcc76 AV |
693 | if (rc == -EMSGSIZE) { |
694 | msg->msg_iter = save; | |
0abd8ff2 | 695 | goto new_mtu; |
f25dcc76 | 696 | } |
0abd8ff2 JPM |
697 | if (rc != -ELINKCONG) |
698 | break; | |
50100a5e | 699 | tipc_sk(sk)->link_cong = 1; |
0abd8ff2 JPM |
700 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
701 | if (rc) | |
94153e36 | 702 | __skb_queue_purge(pktchain); |
0abd8ff2 JPM |
703 | } while (!rc); |
704 | return rc; | |
705 | } | |
706 | ||
cb1b7280 JPM |
707 | /** |
708 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets | |
709 | * @arrvq: queue with arriving messages, to be cloned after destination lookup | |
710 | * @inputq: queue with cloned messages, delivered to socket after dest lookup | |
711 | * | |
712 | * Multi-threaded: parallel calls with reference to same queues may occur | |
078bec82 | 713 | */ |
cb1b7280 JPM |
714 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
715 | struct sk_buff_head *inputq) | |
078bec82 | 716 | { |
cb1b7280 | 717 | struct tipc_msg *msg; |
3c724acd | 718 | struct tipc_plist dports; |
3c724acd | 719 | u32 portid; |
078bec82 | 720 | u32 scope = TIPC_CLUSTER_SCOPE; |
cb1b7280 JPM |
721 | struct sk_buff_head tmpq; |
722 | uint hsz; | |
723 | struct sk_buff *skb, *_skb; | |
3c724acd | 724 | |
cb1b7280 | 725 | __skb_queue_head_init(&tmpq); |
3c724acd | 726 | tipc_plist_init(&dports); |
078bec82 | 727 | |
cb1b7280 JPM |
728 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
729 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { | |
730 | msg = buf_msg(skb); | |
731 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); | |
732 | ||
733 | if (in_own_node(net, msg_orignode(msg))) | |
734 | scope = TIPC_NODE_SCOPE; | |
735 | ||
736 | /* Create destination port list and message clones: */ | |
737 | tipc_nametbl_mc_translate(net, | |
738 | msg_nametype(msg), msg_namelower(msg), | |
739 | msg_nameupper(msg), scope, &dports); | |
740 | portid = tipc_plist_pop(&dports); | |
741 | for (; portid; portid = tipc_plist_pop(&dports)) { | |
742 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); | |
743 | if (_skb) { | |
744 | msg_set_destport(buf_msg(_skb), portid); | |
745 | __skb_queue_tail(&tmpq, _skb); | |
746 | continue; | |
747 | } | |
748 | pr_warn("Failed to clone mcast rcv buffer\n"); | |
078bec82 | 749 | } |
cb1b7280 JPM |
750 | /* Append to inputq if not already done by other thread */ |
751 | spin_lock_bh(&inputq->lock); | |
752 | if (skb_peek(arrvq) == skb) { | |
753 | skb_queue_splice_tail_init(&tmpq, inputq); | |
754 | kfree_skb(__skb_dequeue(arrvq)); | |
755 | } | |
756 | spin_unlock_bh(&inputq->lock); | |
757 | __skb_queue_purge(&tmpq); | |
758 | kfree_skb(skb); | |
078bec82 | 759 | } |
cb1b7280 | 760 | tipc_sk_rcv(net, inputq); |
078bec82 JPM |
761 | } |
762 | ||
ac0074ee JPM |
763 | /** |
764 | * tipc_sk_proto_rcv - receive a connection mng protocol message | |
765 | * @tsk: receiving socket | |
1186adf7 | 766 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed. |
ac0074ee | 767 | */ |
1186adf7 | 768 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff **skb) |
ac0074ee | 769 | { |
1186adf7 | 770 | struct tipc_msg *msg = buf_msg(*skb); |
60120526 | 771 | int conn_cong; |
1186adf7 JPM |
772 | u32 dnode; |
773 | u32 own_node = tsk_own_node(tsk); | |
ac0074ee | 774 | /* Ignore if connection cannot be validated: */ |
2e84c60b | 775 | if (!tsk_peer_msg(tsk, msg)) |
ac0074ee JPM |
776 | goto exit; |
777 | ||
301bae56 | 778 | tsk->probing_state = TIPC_CONN_OK; |
ac0074ee JPM |
779 | |
780 | if (msg_type(msg) == CONN_ACK) { | |
301bae56 | 781 | conn_cong = tsk_conn_cong(tsk); |
60120526 JPM |
782 | tsk->sent_unacked -= msg_msgcnt(msg); |
783 | if (conn_cong) | |
50100a5e | 784 | tsk->sk.sk_write_space(&tsk->sk); |
ac0074ee | 785 | } else if (msg_type(msg) == CONN_PROBE) { |
1186adf7 JPM |
786 | if (tipc_msg_reverse(own_node, *skb, &dnode, TIPC_OK)) { |
787 | msg_set_type(msg, CONN_PROBE_REPLY); | |
788 | return; | |
789 | } | |
ac0074ee JPM |
790 | } |
791 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ | |
792 | exit: | |
1186adf7 JPM |
793 | kfree_skb(*skb); |
794 | *skb = NULL; | |
ac0074ee JPM |
795 | } |
796 | ||
3f40504f YX |
797 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
798 | { | |
799 | struct sock *sk = sock->sk; | |
58ed9442 | 800 | struct tipc_sock *tsk = tipc_sk(sk); |
3f40504f YX |
801 | DEFINE_WAIT(wait); |
802 | int done; | |
803 | ||
804 | do { | |
805 | int err = sock_error(sk); | |
806 | if (err) | |
807 | return err; | |
808 | if (sock->state == SS_DISCONNECTING) | |
809 | return -EPIPE; | |
810 | if (!*timeo_p) | |
811 | return -EAGAIN; | |
812 | if (signal_pending(current)) | |
813 | return sock_intr_errno(*timeo_p); | |
814 | ||
815 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
60120526 | 816 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
3f40504f YX |
817 | finish_wait(sk_sleep(sk), &wait); |
818 | } while (!done); | |
819 | return 0; | |
820 | } | |
821 | ||
b97bf3fd | 822 | /** |
247f0f3c | 823 | * tipc_sendmsg - send message in connectionless manner |
b97bf3fd PL |
824 | * @sock: socket structure |
825 | * @m: message to send | |
e2dafe87 | 826 | * @dsz: amount of user data to be sent |
c4307285 | 827 | * |
b97bf3fd | 828 | * Message must have an destination specified explicitly. |
c4307285 | 829 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
b97bf3fd PL |
830 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
831 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) | |
c4307285 | 832 | * |
b97bf3fd PL |
833 | * Returns the number of bytes sent on success, or errno otherwise |
834 | */ | |
1b784140 | 835 | static int tipc_sendmsg(struct socket *sock, |
e2dafe87 | 836 | struct msghdr *m, size_t dsz) |
39a0295f YX |
837 | { |
838 | struct sock *sk = sock->sk; | |
839 | int ret; | |
840 | ||
841 | lock_sock(sk); | |
842 | ret = __tipc_sendmsg(sock, m, dsz); | |
843 | release_sock(sk); | |
844 | ||
845 | return ret; | |
846 | } | |
847 | ||
848 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 849 | { |
e2dafe87 | 850 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
0c3141e9 | 851 | struct sock *sk = sock->sk; |
58ed9442 | 852 | struct tipc_sock *tsk = tipc_sk(sk); |
f2f9800d | 853 | struct net *net = sock_net(sk); |
301bae56 | 854 | struct tipc_msg *mhdr = &tsk->phdr; |
e2dafe87 | 855 | u32 dnode, dport; |
94153e36 | 856 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
a6ca1094 | 857 | struct sk_buff *skb; |
f2f8036e | 858 | struct tipc_name_seq *seq; |
f25dcc76 | 859 | struct iov_iter save; |
e2dafe87 | 860 | u32 mtu; |
3f40504f | 861 | long timeo; |
88b17b6a | 862 | int rc; |
b97bf3fd | 863 | |
e2dafe87 | 864 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
c29c3f70 | 865 | return -EMSGSIZE; |
f2f8036e EH |
866 | if (unlikely(!dest)) { |
867 | if (tsk->connected && sock->state == SS_READY) | |
868 | dest = &tsk->remote; | |
869 | else | |
870 | return -EDESTADDRREQ; | |
871 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || | |
872 | dest->family != AF_TIPC) { | |
873 | return -EINVAL; | |
874 | } | |
e2dafe87 | 875 | if (unlikely(sock->state != SS_READY)) { |
39a0295f YX |
876 | if (sock->state == SS_LISTENING) |
877 | return -EPIPE; | |
878 | if (sock->state != SS_UNCONNECTED) | |
879 | return -EISCONN; | |
880 | if (tsk->published) | |
881 | return -EOPNOTSUPP; | |
3388007b | 882 | if (dest->addrtype == TIPC_ADDR_NAME) { |
301bae56 JPM |
883 | tsk->conn_type = dest->addr.name.name.type; |
884 | tsk->conn_instance = dest->addr.name.name.instance; | |
3388007b | 885 | } |
b97bf3fd | 886 | } |
f2f8036e | 887 | seq = &dest->addr.nameseq; |
3f40504f | 888 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
e2dafe87 JPM |
889 | |
890 | if (dest->addrtype == TIPC_ADDR_MCAST) { | |
39a0295f | 891 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
e2dafe87 JPM |
892 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
893 | u32 type = dest->addr.name.name.type; | |
894 | u32 inst = dest->addr.name.name.instance; | |
895 | u32 domain = dest->addr.name.domain; | |
896 | ||
897 | dnode = domain; | |
898 | msg_set_type(mhdr, TIPC_NAMED_MSG); | |
899 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); | |
900 | msg_set_nametype(mhdr, type); | |
901 | msg_set_nameinst(mhdr, inst); | |
902 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); | |
4ac1c8d0 | 903 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
e2dafe87 JPM |
904 | msg_set_destnode(mhdr, dnode); |
905 | msg_set_destport(mhdr, dport); | |
39a0295f YX |
906 | if (unlikely(!dport && !dnode)) |
907 | return -EHOSTUNREACH; | |
e2dafe87 JPM |
908 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
909 | dnode = dest->addr.id.node; | |
910 | msg_set_type(mhdr, TIPC_DIRECT_MSG); | |
911 | msg_set_lookup_scope(mhdr, 0); | |
912 | msg_set_destnode(mhdr, dnode); | |
913 | msg_set_destport(mhdr, dest->addr.id.ref); | |
914 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); | |
915 | } | |
916 | ||
f25dcc76 | 917 | save = m->msg_iter; |
e2dafe87 | 918 | new_mtu: |
f2f9800d | 919 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
94153e36 | 920 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, pktchain); |
e2dafe87 | 921 | if (rc < 0) |
39a0295f | 922 | return rc; |
e2dafe87 JPM |
923 | |
924 | do { | |
94153e36 | 925 | skb = skb_peek(pktchain); |
a6ca1094 | 926 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
94153e36 | 927 | rc = tipc_link_xmit(net, pktchain, dnode, tsk->portid); |
e2dafe87 JPM |
928 | if (likely(rc >= 0)) { |
929 | if (sock->state != SS_READY) | |
0c3141e9 | 930 | sock->state = SS_CONNECTING; |
e2dafe87 | 931 | rc = dsz; |
0c3141e9 | 932 | break; |
c4307285 | 933 | } |
f25dcc76 AV |
934 | if (rc == -EMSGSIZE) { |
935 | m->msg_iter = save; | |
e2dafe87 | 936 | goto new_mtu; |
f25dcc76 | 937 | } |
e2dafe87 | 938 | if (rc != -ELINKCONG) |
0c3141e9 | 939 | break; |
50100a5e | 940 | tsk->link_cong = 1; |
e2dafe87 | 941 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
70452dcb | 942 | if (rc) |
94153e36 | 943 | __skb_queue_purge(pktchain); |
e2dafe87 | 944 | } while (!rc); |
e2dafe87 JPM |
945 | |
946 | return rc; | |
b97bf3fd PL |
947 | } |
948 | ||
391a6dd1 YX |
949 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
950 | { | |
951 | struct sock *sk = sock->sk; | |
58ed9442 | 952 | struct tipc_sock *tsk = tipc_sk(sk); |
391a6dd1 YX |
953 | DEFINE_WAIT(wait); |
954 | int done; | |
955 | ||
956 | do { | |
957 | int err = sock_error(sk); | |
958 | if (err) | |
959 | return err; | |
960 | if (sock->state == SS_DISCONNECTING) | |
961 | return -EPIPE; | |
962 | else if (sock->state != SS_CONNECTED) | |
963 | return -ENOTCONN; | |
964 | if (!*timeo_p) | |
965 | return -EAGAIN; | |
966 | if (signal_pending(current)) | |
967 | return sock_intr_errno(*timeo_p); | |
968 | ||
969 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
970 | done = sk_wait_event(sk, timeo_p, | |
60120526 | 971 | (!tsk->link_cong && |
301bae56 JPM |
972 | !tsk_conn_cong(tsk)) || |
973 | !tsk->connected); | |
391a6dd1 YX |
974 | finish_wait(sk_sleep(sk), &wait); |
975 | } while (!done); | |
976 | return 0; | |
977 | } | |
978 | ||
c4307285 | 979 | /** |
4ccfe5e0 | 980 | * tipc_send_stream - send stream-oriented data |
b97bf3fd | 981 | * @sock: socket structure |
4ccfe5e0 JPM |
982 | * @m: data to send |
983 | * @dsz: total length of data to be transmitted | |
c4307285 | 984 | * |
4ccfe5e0 | 985 | * Used for SOCK_STREAM data. |
c4307285 | 986 | * |
4ccfe5e0 JPM |
987 | * Returns the number of bytes sent on success (or partial success), |
988 | * or errno if no data sent | |
b97bf3fd | 989 | */ |
1b784140 | 990 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
39a0295f YX |
991 | { |
992 | struct sock *sk = sock->sk; | |
993 | int ret; | |
994 | ||
995 | lock_sock(sk); | |
996 | ret = __tipc_send_stream(sock, m, dsz); | |
997 | release_sock(sk); | |
998 | ||
999 | return ret; | |
1000 | } | |
1001 | ||
1002 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) | |
b97bf3fd | 1003 | { |
0c3141e9 | 1004 | struct sock *sk = sock->sk; |
f2f9800d | 1005 | struct net *net = sock_net(sk); |
58ed9442 | 1006 | struct tipc_sock *tsk = tipc_sk(sk); |
301bae56 | 1007 | struct tipc_msg *mhdr = &tsk->phdr; |
94153e36 | 1008 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
342dfc30 | 1009 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
07f6c4bc | 1010 | u32 portid = tsk->portid; |
4ccfe5e0 | 1011 | int rc = -EINVAL; |
391a6dd1 | 1012 | long timeo; |
4ccfe5e0 JPM |
1013 | u32 dnode; |
1014 | uint mtu, send, sent = 0; | |
f25dcc76 | 1015 | struct iov_iter save; |
b97bf3fd PL |
1016 | |
1017 | /* Handle implied connection establishment */ | |
4ccfe5e0 | 1018 | if (unlikely(dest)) { |
39a0295f | 1019 | rc = __tipc_sendmsg(sock, m, dsz); |
4ccfe5e0 | 1020 | if (dsz && (dsz == rc)) |
60120526 | 1021 | tsk->sent_unacked = 1; |
4ccfe5e0 JPM |
1022 | return rc; |
1023 | } | |
1024 | if (dsz > (uint)INT_MAX) | |
c29c3f70 AS |
1025 | return -EMSGSIZE; |
1026 | ||
391a6dd1 YX |
1027 | if (unlikely(sock->state != SS_CONNECTED)) { |
1028 | if (sock->state == SS_DISCONNECTING) | |
39a0295f | 1029 | return -EPIPE; |
391a6dd1 | 1030 | else |
39a0295f | 1031 | return -ENOTCONN; |
391a6dd1 | 1032 | } |
1d835874 | 1033 | |
391a6dd1 | 1034 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
301bae56 | 1035 | dnode = tsk_peer_node(tsk); |
4ccfe5e0 JPM |
1036 | |
1037 | next: | |
f25dcc76 | 1038 | save = m->msg_iter; |
301bae56 | 1039 | mtu = tsk->max_pkt; |
4ccfe5e0 | 1040 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
94153e36 | 1041 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, pktchain); |
4ccfe5e0 | 1042 | if (unlikely(rc < 0)) |
39a0295f | 1043 | return rc; |
c4307285 | 1044 | do { |
301bae56 | 1045 | if (likely(!tsk_conn_cong(tsk))) { |
94153e36 | 1046 | rc = tipc_link_xmit(net, pktchain, dnode, portid); |
4ccfe5e0 | 1047 | if (likely(!rc)) { |
60120526 | 1048 | tsk->sent_unacked++; |
4ccfe5e0 JPM |
1049 | sent += send; |
1050 | if (sent == dsz) | |
1051 | break; | |
1052 | goto next; | |
1053 | } | |
1054 | if (rc == -EMSGSIZE) { | |
f2f9800d YX |
1055 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
1056 | portid); | |
f25dcc76 | 1057 | m->msg_iter = save; |
4ccfe5e0 JPM |
1058 | goto next; |
1059 | } | |
1060 | if (rc != -ELINKCONG) | |
1061 | break; | |
50100a5e | 1062 | tsk->link_cong = 1; |
4ccfe5e0 JPM |
1063 | } |
1064 | rc = tipc_wait_for_sndpkt(sock, &timeo); | |
70452dcb | 1065 | if (rc) |
94153e36 | 1066 | __skb_queue_purge(pktchain); |
4ccfe5e0 | 1067 | } while (!rc); |
39a0295f | 1068 | |
4ccfe5e0 | 1069 | return sent ? sent : rc; |
b97bf3fd PL |
1070 | } |
1071 | ||
c4307285 | 1072 | /** |
4ccfe5e0 | 1073 | * tipc_send_packet - send a connection-oriented message |
b97bf3fd | 1074 | * @sock: socket structure |
4ccfe5e0 JPM |
1075 | * @m: message to send |
1076 | * @dsz: length of data to be transmitted | |
c4307285 | 1077 | * |
4ccfe5e0 | 1078 | * Used for SOCK_SEQPACKET messages. |
c4307285 | 1079 | * |
4ccfe5e0 | 1080 | * Returns the number of bytes sent on success, or errno otherwise |
b97bf3fd | 1081 | */ |
1b784140 | 1082 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
b97bf3fd | 1083 | { |
4ccfe5e0 JPM |
1084 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
1085 | return -EMSGSIZE; | |
b97bf3fd | 1086 | |
1b784140 | 1087 | return tipc_send_stream(sock, m, dsz); |
b97bf3fd PL |
1088 | } |
1089 | ||
dadebc00 | 1090 | /* tipc_sk_finish_conn - complete the setup of a connection |
b97bf3fd | 1091 | */ |
301bae56 | 1092 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
dadebc00 | 1093 | u32 peer_node) |
b97bf3fd | 1094 | { |
3721e9c7 YX |
1095 | struct sock *sk = &tsk->sk; |
1096 | struct net *net = sock_net(sk); | |
301bae56 | 1097 | struct tipc_msg *msg = &tsk->phdr; |
b97bf3fd | 1098 | |
dadebc00 JPM |
1099 | msg_set_destnode(msg, peer_node); |
1100 | msg_set_destport(msg, peer_port); | |
1101 | msg_set_type(msg, TIPC_CONN_MSG); | |
1102 | msg_set_lookup_scope(msg, 0); | |
1103 | msg_set_hdr_sz(msg, SHORT_H_SIZE); | |
584d24b3 | 1104 | |
2f55c437 | 1105 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
301bae56 JPM |
1106 | tsk->probing_state = TIPC_CONN_OK; |
1107 | tsk->connected = 1; | |
3721e9c7 | 1108 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
f2f9800d YX |
1109 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
1110 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); | |
b97bf3fd PL |
1111 | } |
1112 | ||
1113 | /** | |
1114 | * set_orig_addr - capture sender's address for received message | |
1115 | * @m: descriptor for message info | |
1116 | * @msg: received message header | |
c4307285 | 1117 | * |
b97bf3fd PL |
1118 | * Note: Address is not captured if not requested by receiver. |
1119 | */ | |
05790c64 | 1120 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
b97bf3fd | 1121 | { |
342dfc30 | 1122 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
b97bf3fd | 1123 | |
c4307285 | 1124 | if (addr) { |
b97bf3fd PL |
1125 | addr->family = AF_TIPC; |
1126 | addr->addrtype = TIPC_ADDR_ID; | |
60085c3d | 1127 | memset(&addr->addr, 0, sizeof(addr->addr)); |
b97bf3fd PL |
1128 | addr->addr.id.ref = msg_origport(msg); |
1129 | addr->addr.id.node = msg_orignode(msg); | |
0e65967e AS |
1130 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
1131 | addr->scope = 0; /* could leave uninitialized */ | |
b97bf3fd PL |
1132 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
1133 | } | |
1134 | } | |
1135 | ||
1136 | /** | |
301bae56 | 1137 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
b97bf3fd PL |
1138 | * @m: descriptor for message info |
1139 | * @msg: received message header | |
301bae56 | 1140 | * @tsk: TIPC port associated with message |
c4307285 | 1141 | * |
b97bf3fd | 1142 | * Note: Ancillary data is not captured if not requested by receiver. |
c4307285 | 1143 | * |
b97bf3fd PL |
1144 | * Returns 0 if successful, otherwise errno |
1145 | */ | |
301bae56 JPM |
1146 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
1147 | struct tipc_sock *tsk) | |
b97bf3fd PL |
1148 | { |
1149 | u32 anc_data[3]; | |
1150 | u32 err; | |
1151 | u32 dest_type; | |
3546c750 | 1152 | int has_name; |
b97bf3fd PL |
1153 | int res; |
1154 | ||
1155 | if (likely(m->msg_controllen == 0)) | |
1156 | return 0; | |
1157 | ||
1158 | /* Optionally capture errored message object(s) */ | |
b97bf3fd PL |
1159 | err = msg ? msg_errcode(msg) : 0; |
1160 | if (unlikely(err)) { | |
1161 | anc_data[0] = err; | |
1162 | anc_data[1] = msg_data_sz(msg); | |
2db9983a AS |
1163 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
1164 | if (res) | |
b97bf3fd | 1165 | return res; |
2db9983a AS |
1166 | if (anc_data[1]) { |
1167 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], | |
1168 | msg_data(msg)); | |
1169 | if (res) | |
1170 | return res; | |
1171 | } | |
b97bf3fd PL |
1172 | } |
1173 | ||
1174 | /* Optionally capture message destination object */ | |
b97bf3fd PL |
1175 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
1176 | switch (dest_type) { | |
1177 | case TIPC_NAMED_MSG: | |
3546c750 | 1178 | has_name = 1; |
b97bf3fd PL |
1179 | anc_data[0] = msg_nametype(msg); |
1180 | anc_data[1] = msg_namelower(msg); | |
1181 | anc_data[2] = msg_namelower(msg); | |
1182 | break; | |
1183 | case TIPC_MCAST_MSG: | |
3546c750 | 1184 | has_name = 1; |
b97bf3fd PL |
1185 | anc_data[0] = msg_nametype(msg); |
1186 | anc_data[1] = msg_namelower(msg); | |
1187 | anc_data[2] = msg_nameupper(msg); | |
1188 | break; | |
1189 | case TIPC_CONN_MSG: | |
301bae56 JPM |
1190 | has_name = (tsk->conn_type != 0); |
1191 | anc_data[0] = tsk->conn_type; | |
1192 | anc_data[1] = tsk->conn_instance; | |
1193 | anc_data[2] = tsk->conn_instance; | |
b97bf3fd PL |
1194 | break; |
1195 | default: | |
3546c750 | 1196 | has_name = 0; |
b97bf3fd | 1197 | } |
2db9983a AS |
1198 | if (has_name) { |
1199 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); | |
1200 | if (res) | |
1201 | return res; | |
1202 | } | |
b97bf3fd PL |
1203 | |
1204 | return 0; | |
1205 | } | |
1206 | ||
301bae56 | 1207 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
739f5e4e | 1208 | { |
f2f9800d | 1209 | struct net *net = sock_net(&tsk->sk); |
a6ca1094 | 1210 | struct sk_buff *skb = NULL; |
739f5e4e | 1211 | struct tipc_msg *msg; |
301bae56 JPM |
1212 | u32 peer_port = tsk_peer_port(tsk); |
1213 | u32 dnode = tsk_peer_node(tsk); | |
739f5e4e | 1214 | |
301bae56 | 1215 | if (!tsk->connected) |
739f5e4e | 1216 | return; |
c5898636 JPM |
1217 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
1218 | dnode, tsk_own_node(tsk), peer_port, | |
1219 | tsk->portid, TIPC_OK); | |
a6ca1094 | 1220 | if (!skb) |
739f5e4e | 1221 | return; |
a6ca1094 | 1222 | msg = buf_msg(skb); |
739f5e4e | 1223 | msg_set_msgcnt(msg, ack); |
f2f9800d | 1224 | tipc_link_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
739f5e4e JPM |
1225 | } |
1226 | ||
85d3fc94 | 1227 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
9bbb4ecc YX |
1228 | { |
1229 | struct sock *sk = sock->sk; | |
1230 | DEFINE_WAIT(wait); | |
85d3fc94 | 1231 | long timeo = *timeop; |
9bbb4ecc YX |
1232 | int err; |
1233 | ||
1234 | for (;;) { | |
1235 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
fe8e4649 | 1236 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
9bbb4ecc YX |
1237 | if (sock->state == SS_DISCONNECTING) { |
1238 | err = -ENOTCONN; | |
1239 | break; | |
1240 | } | |
1241 | release_sock(sk); | |
1242 | timeo = schedule_timeout(timeo); | |
1243 | lock_sock(sk); | |
1244 | } | |
1245 | err = 0; | |
1246 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1247 | break; | |
9bbb4ecc YX |
1248 | err = -EAGAIN; |
1249 | if (!timeo) | |
1250 | break; | |
143fe22f EH |
1251 | err = sock_intr_errno(timeo); |
1252 | if (signal_pending(current)) | |
1253 | break; | |
9bbb4ecc YX |
1254 | } |
1255 | finish_wait(sk_sleep(sk), &wait); | |
85d3fc94 | 1256 | *timeop = timeo; |
9bbb4ecc YX |
1257 | return err; |
1258 | } | |
1259 | ||
c4307285 | 1260 | /** |
247f0f3c | 1261 | * tipc_recvmsg - receive packet-oriented message |
b97bf3fd PL |
1262 | * @m: descriptor for message info |
1263 | * @buf_len: total size of user buffer area | |
1264 | * @flags: receive flags | |
c4307285 | 1265 | * |
b97bf3fd PL |
1266 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
1267 | * If the complete message doesn't fit in user area, truncate it. | |
1268 | * | |
1269 | * Returns size of returned message data, errno otherwise | |
1270 | */ | |
1b784140 YX |
1271 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
1272 | int flags) | |
b97bf3fd | 1273 | { |
0c3141e9 | 1274 | struct sock *sk = sock->sk; |
58ed9442 | 1275 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1276 | struct sk_buff *buf; |
1277 | struct tipc_msg *msg; | |
9bbb4ecc | 1278 | long timeo; |
b97bf3fd PL |
1279 | unsigned int sz; |
1280 | u32 err; | |
1281 | int res; | |
1282 | ||
0c3141e9 | 1283 | /* Catch invalid receive requests */ |
b97bf3fd PL |
1284 | if (unlikely(!buf_len)) |
1285 | return -EINVAL; | |
1286 | ||
0c3141e9 | 1287 | lock_sock(sk); |
b97bf3fd | 1288 | |
0c3141e9 AS |
1289 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
1290 | res = -ENOTCONN; | |
b97bf3fd PL |
1291 | goto exit; |
1292 | } | |
1293 | ||
9bbb4ecc | 1294 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
0c3141e9 | 1295 | restart: |
b97bf3fd | 1296 | |
0c3141e9 | 1297 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1298 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1299 | if (res) |
1300 | goto exit; | |
b97bf3fd | 1301 | |
0c3141e9 | 1302 | /* Look at first message in receive queue */ |
0c3141e9 | 1303 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1304 | msg = buf_msg(buf); |
1305 | sz = msg_data_sz(msg); | |
1306 | err = msg_errcode(msg); | |
1307 | ||
b97bf3fd | 1308 | /* Discard an empty non-errored message & try again */ |
b97bf3fd | 1309 | if ((!sz) && (!err)) { |
2e84c60b | 1310 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1311 | goto restart; |
1312 | } | |
1313 | ||
1314 | /* Capture sender's address (optional) */ | |
b97bf3fd PL |
1315 | set_orig_addr(m, msg); |
1316 | ||
1317 | /* Capture ancillary data (optional) */ | |
301bae56 | 1318 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1319 | if (res) |
b97bf3fd PL |
1320 | goto exit; |
1321 | ||
1322 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd PL |
1323 | if (!err) { |
1324 | if (unlikely(buf_len < sz)) { | |
1325 | sz = buf_len; | |
1326 | m->msg_flags |= MSG_TRUNC; | |
1327 | } | |
51f3d02b | 1328 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
0232fd0a | 1329 | if (res) |
b97bf3fd | 1330 | goto exit; |
b97bf3fd PL |
1331 | res = sz; |
1332 | } else { | |
1333 | if ((sock->state == SS_READY) || | |
1334 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) | |
1335 | res = 0; | |
1336 | else | |
1337 | res = -ECONNRESET; | |
1338 | } | |
1339 | ||
1340 | /* Consume received message (optional) */ | |
b97bf3fd | 1341 | if (likely(!(flags & MSG_PEEK))) { |
99009806 | 1342 | if ((sock->state != SS_READY) && |
60120526 | 1343 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1344 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1345 | tsk->rcv_unacked = 0; |
1346 | } | |
2e84c60b | 1347 | tsk_advance_rx_queue(sk); |
c4307285 | 1348 | } |
b97bf3fd | 1349 | exit: |
0c3141e9 | 1350 | release_sock(sk); |
b97bf3fd PL |
1351 | return res; |
1352 | } | |
1353 | ||
c4307285 | 1354 | /** |
247f0f3c | 1355 | * tipc_recv_stream - receive stream-oriented data |
b97bf3fd PL |
1356 | * @m: descriptor for message info |
1357 | * @buf_len: total size of user buffer area | |
1358 | * @flags: receive flags | |
c4307285 YH |
1359 | * |
1360 | * Used for SOCK_STREAM messages only. If not enough data is available | |
b97bf3fd PL |
1361 | * will optionally wait for more; never truncates data. |
1362 | * | |
1363 | * Returns size of returned message data, errno otherwise | |
1364 | */ | |
1b784140 YX |
1365 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
1366 | size_t buf_len, int flags) | |
b97bf3fd | 1367 | { |
0c3141e9 | 1368 | struct sock *sk = sock->sk; |
58ed9442 | 1369 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
1370 | struct sk_buff *buf; |
1371 | struct tipc_msg *msg; | |
9bbb4ecc | 1372 | long timeo; |
b97bf3fd | 1373 | unsigned int sz; |
3720d40b | 1374 | int sz_to_copy, target, needed; |
b97bf3fd | 1375 | int sz_copied = 0; |
b97bf3fd | 1376 | u32 err; |
0c3141e9 | 1377 | int res = 0; |
b97bf3fd | 1378 | |
0c3141e9 | 1379 | /* Catch invalid receive attempts */ |
b97bf3fd PL |
1380 | if (unlikely(!buf_len)) |
1381 | return -EINVAL; | |
1382 | ||
0c3141e9 | 1383 | lock_sock(sk); |
b97bf3fd | 1384 | |
9bbb4ecc | 1385 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
0c3141e9 | 1386 | res = -ENOTCONN; |
b97bf3fd PL |
1387 | goto exit; |
1388 | } | |
1389 | ||
3720d40b | 1390 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
9bbb4ecc | 1391 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
b97bf3fd | 1392 | |
617d3c7a | 1393 | restart: |
0c3141e9 | 1394 | /* Look for a message in receive queue; wait if necessary */ |
85d3fc94 | 1395 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
9bbb4ecc YX |
1396 | if (res) |
1397 | goto exit; | |
b97bf3fd | 1398 | |
0c3141e9 | 1399 | /* Look at first message in receive queue */ |
0c3141e9 | 1400 | buf = skb_peek(&sk->sk_receive_queue); |
b97bf3fd PL |
1401 | msg = buf_msg(buf); |
1402 | sz = msg_data_sz(msg); | |
1403 | err = msg_errcode(msg); | |
1404 | ||
1405 | /* Discard an empty non-errored message & try again */ | |
b97bf3fd | 1406 | if ((!sz) && (!err)) { |
2e84c60b | 1407 | tsk_advance_rx_queue(sk); |
b97bf3fd PL |
1408 | goto restart; |
1409 | } | |
1410 | ||
1411 | /* Optionally capture sender's address & ancillary data of first msg */ | |
b97bf3fd PL |
1412 | if (sz_copied == 0) { |
1413 | set_orig_addr(m, msg); | |
301bae56 | 1414 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
0c3141e9 | 1415 | if (res) |
b97bf3fd PL |
1416 | goto exit; |
1417 | } | |
1418 | ||
1419 | /* Capture message data (if valid) & compute return value (always) */ | |
b97bf3fd | 1420 | if (!err) { |
0232fd0a | 1421 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
b97bf3fd | 1422 | |
0232fd0a | 1423 | sz -= offset; |
b97bf3fd PL |
1424 | needed = (buf_len - sz_copied); |
1425 | sz_to_copy = (sz <= needed) ? sz : needed; | |
0232fd0a | 1426 | |
51f3d02b DM |
1427 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
1428 | m, sz_to_copy); | |
0232fd0a | 1429 | if (res) |
b97bf3fd | 1430 | goto exit; |
0232fd0a | 1431 | |
b97bf3fd PL |
1432 | sz_copied += sz_to_copy; |
1433 | ||
1434 | if (sz_to_copy < sz) { | |
1435 | if (!(flags & MSG_PEEK)) | |
0232fd0a AS |
1436 | TIPC_SKB_CB(buf)->handle = |
1437 | (void *)(unsigned long)(offset + sz_to_copy); | |
b97bf3fd PL |
1438 | goto exit; |
1439 | } | |
b97bf3fd PL |
1440 | } else { |
1441 | if (sz_copied != 0) | |
1442 | goto exit; /* can't add error msg to valid data */ | |
1443 | ||
1444 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) | |
1445 | res = 0; | |
1446 | else | |
1447 | res = -ECONNRESET; | |
1448 | } | |
1449 | ||
1450 | /* Consume received message (optional) */ | |
b97bf3fd | 1451 | if (likely(!(flags & MSG_PEEK))) { |
60120526 | 1452 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
301bae56 | 1453 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
60120526 JPM |
1454 | tsk->rcv_unacked = 0; |
1455 | } | |
2e84c60b | 1456 | tsk_advance_rx_queue(sk); |
c4307285 | 1457 | } |
b97bf3fd PL |
1458 | |
1459 | /* Loop around if more data is required */ | |
f64f9e71 JP |
1460 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
1461 | (!skb_queue_empty(&sk->sk_receive_queue) || | |
3720d40b | 1462 | (sz_copied < target)) && /* and more is ready or required */ |
f64f9e71 JP |
1463 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
1464 | (!err)) /* and haven't reached a FIN */ | |
b97bf3fd PL |
1465 | goto restart; |
1466 | ||
1467 | exit: | |
0c3141e9 | 1468 | release_sock(sk); |
a3b0a5a9 | 1469 | return sz_copied ? sz_copied : res; |
b97bf3fd PL |
1470 | } |
1471 | ||
f288bef4 YX |
1472 | /** |
1473 | * tipc_write_space - wake up thread if port congestion is released | |
1474 | * @sk: socket | |
1475 | */ | |
1476 | static void tipc_write_space(struct sock *sk) | |
1477 | { | |
1478 | struct socket_wq *wq; | |
1479 | ||
1480 | rcu_read_lock(); | |
1481 | wq = rcu_dereference(sk->sk_wq); | |
1482 | if (wq_has_sleeper(wq)) | |
1483 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
1484 | POLLWRNORM | POLLWRBAND); | |
1485 | rcu_read_unlock(); | |
1486 | } | |
1487 | ||
1488 | /** | |
1489 | * tipc_data_ready - wake up threads to indicate messages have been received | |
1490 | * @sk: socket | |
1491 | * @len: the length of messages | |
1492 | */ | |
676d2369 | 1493 | static void tipc_data_ready(struct sock *sk) |
f288bef4 YX |
1494 | { |
1495 | struct socket_wq *wq; | |
1496 | ||
1497 | rcu_read_lock(); | |
1498 | wq = rcu_dereference(sk->sk_wq); | |
1499 | if (wq_has_sleeper(wq)) | |
1500 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
1501 | POLLRDNORM | POLLRDBAND); | |
1502 | rcu_read_unlock(); | |
1503 | } | |
1504 | ||
7e6c131e YX |
1505 | /** |
1506 | * filter_connect - Handle all incoming messages for a connection-based socket | |
58ed9442 | 1507 | * @tsk: TIPC socket |
1186adf7 | 1508 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
7e6c131e | 1509 | * |
b2ad5e5f | 1510 | * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise |
7e6c131e | 1511 | */ |
1186adf7 | 1512 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **skb) |
7e6c131e | 1513 | { |
58ed9442 | 1514 | struct sock *sk = &tsk->sk; |
f2f9800d | 1515 | struct net *net = sock_net(sk); |
8826cde6 | 1516 | struct socket *sock = sk->sk_socket; |
1186adf7 | 1517 | struct tipc_msg *msg = buf_msg(*skb); |
e4de5fab | 1518 | int retval = -TIPC_ERR_NO_PORT; |
7e6c131e YX |
1519 | |
1520 | if (msg_mcast(msg)) | |
1521 | return retval; | |
1522 | ||
1523 | switch ((int)sock->state) { | |
1524 | case SS_CONNECTED: | |
1525 | /* Accept only connection-based messages sent by peer */ | |
2e84c60b | 1526 | if (tsk_peer_msg(tsk, msg)) { |
7e6c131e YX |
1527 | if (unlikely(msg_errcode(msg))) { |
1528 | sock->state = SS_DISCONNECTING; | |
301bae56 | 1529 | tsk->connected = 0; |
dadebc00 | 1530 | /* let timer expire on it's own */ |
f2f9800d | 1531 | tipc_node_remove_conn(net, tsk_peer_node(tsk), |
07f6c4bc | 1532 | tsk->portid); |
7e6c131e YX |
1533 | } |
1534 | retval = TIPC_OK; | |
1535 | } | |
1536 | break; | |
1537 | case SS_CONNECTING: | |
1538 | /* Accept only ACK or NACK message */ | |
dadebc00 JPM |
1539 | |
1540 | if (unlikely(!msg_connected(msg))) | |
1541 | break; | |
1542 | ||
584d24b3 YX |
1543 | if (unlikely(msg_errcode(msg))) { |
1544 | sock->state = SS_DISCONNECTING; | |
2c8d8518 | 1545 | sk->sk_err = ECONNREFUSED; |
584d24b3 YX |
1546 | retval = TIPC_OK; |
1547 | break; | |
1548 | } | |
1549 | ||
dadebc00 | 1550 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
584d24b3 | 1551 | sock->state = SS_DISCONNECTING; |
dadebc00 | 1552 | sk->sk_err = EINVAL; |
7e6c131e | 1553 | retval = TIPC_OK; |
584d24b3 YX |
1554 | break; |
1555 | } | |
1556 | ||
301bae56 JPM |
1557 | tipc_sk_finish_conn(tsk, msg_origport(msg), msg_orignode(msg)); |
1558 | msg_set_importance(&tsk->phdr, msg_importance(msg)); | |
dadebc00 JPM |
1559 | sock->state = SS_CONNECTED; |
1560 | ||
584d24b3 YX |
1561 | /* If an incoming message is an 'ACK-', it should be |
1562 | * discarded here because it doesn't contain useful | |
1563 | * data. In addition, we should try to wake up | |
1564 | * connect() routine if sleeping. | |
1565 | */ | |
1566 | if (msg_data_sz(msg) == 0) { | |
1186adf7 JPM |
1567 | kfree_skb(*skb); |
1568 | *skb = NULL; | |
584d24b3 YX |
1569 | if (waitqueue_active(sk_sleep(sk))) |
1570 | wake_up_interruptible(sk_sleep(sk)); | |
1571 | } | |
1572 | retval = TIPC_OK; | |
7e6c131e YX |
1573 | break; |
1574 | case SS_LISTENING: | |
1575 | case SS_UNCONNECTED: | |
1576 | /* Accept only SYN message */ | |
1577 | if (!msg_connected(msg) && !(msg_errcode(msg))) | |
1578 | retval = TIPC_OK; | |
1579 | break; | |
1580 | case SS_DISCONNECTING: | |
1581 | break; | |
1582 | default: | |
1583 | pr_err("Unknown socket state %u\n", sock->state); | |
1584 | } | |
1585 | return retval; | |
1586 | } | |
1587 | ||
aba79f33 YX |
1588 | /** |
1589 | * rcvbuf_limit - get proper overload limit of socket receive queue | |
1590 | * @sk: socket | |
1591 | * @buf: message | |
1592 | * | |
1593 | * For all connection oriented messages, irrespective of importance, | |
1594 | * the default overload value (i.e. 67MB) is set as limit. | |
1595 | * | |
1596 | * For all connectionless messages, by default new queue limits are | |
1597 | * as belows: | |
1598 | * | |
cc79dd1b YX |
1599 | * TIPC_LOW_IMPORTANCE (4 MB) |
1600 | * TIPC_MEDIUM_IMPORTANCE (8 MB) | |
1601 | * TIPC_HIGH_IMPORTANCE (16 MB) | |
1602 | * TIPC_CRITICAL_IMPORTANCE (32 MB) | |
aba79f33 YX |
1603 | * |
1604 | * Returns overload limit according to corresponding message importance | |
1605 | */ | |
1606 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) | |
1607 | { | |
1608 | struct tipc_msg *msg = buf_msg(buf); | |
aba79f33 YX |
1609 | |
1610 | if (msg_connected(msg)) | |
0cee6bbe | 1611 | return sysctl_tipc_rmem[2]; |
1612 | ||
1613 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << | |
1614 | msg_importance(msg); | |
aba79f33 YX |
1615 | } |
1616 | ||
c4307285 | 1617 | /** |
0c3141e9 AS |
1618 | * filter_rcv - validate incoming message |
1619 | * @sk: socket | |
1186adf7 | 1620 | * @skb: pointer to message. Set to NULL if buffer is consumed. |
c4307285 | 1621 | * |
0c3141e9 AS |
1622 | * Enqueues message on receive queue if acceptable; optionally handles |
1623 | * disconnect indication for a connected socket. | |
1624 | * | |
1186adf7 | 1625 | * Called with socket lock already taken |
c4307285 | 1626 | * |
1186adf7 | 1627 | * Returns 0 (TIPC_OK) if message was ok, -TIPC error code if rejected |
b97bf3fd | 1628 | */ |
1186adf7 | 1629 | static int filter_rcv(struct sock *sk, struct sk_buff **skb) |
b97bf3fd | 1630 | { |
0c3141e9 | 1631 | struct socket *sock = sk->sk_socket; |
58ed9442 | 1632 | struct tipc_sock *tsk = tipc_sk(sk); |
1186adf7 JPM |
1633 | struct tipc_msg *msg = buf_msg(*skb); |
1634 | unsigned int limit = rcvbuf_limit(sk, *skb); | |
e4de5fab | 1635 | int rc = TIPC_OK; |
b97bf3fd | 1636 | |
1186adf7 JPM |
1637 | if (unlikely(msg_user(msg) == CONN_MANAGER)) { |
1638 | tipc_sk_proto_rcv(tsk, skb); | |
1639 | return TIPC_OK; | |
1640 | } | |
ec8a2e56 | 1641 | |
50100a5e | 1642 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
1186adf7 | 1643 | kfree_skb(*skb); |
50100a5e JPM |
1644 | tsk->link_cong = 0; |
1645 | sk->sk_write_space(sk); | |
1186adf7 | 1646 | *skb = NULL; |
50100a5e JPM |
1647 | return TIPC_OK; |
1648 | } | |
1649 | ||
b97bf3fd | 1650 | /* Reject message if it is wrong sort of message for socket */ |
aad58547 | 1651 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
e4de5fab | 1652 | return -TIPC_ERR_NO_PORT; |
0c3141e9 | 1653 | |
b97bf3fd | 1654 | if (sock->state == SS_READY) { |
b29f1428 | 1655 | if (msg_connected(msg)) |
e4de5fab | 1656 | return -TIPC_ERR_NO_PORT; |
b97bf3fd | 1657 | } else { |
1186adf7 JPM |
1658 | rc = filter_connect(tsk, skb); |
1659 | if (rc != TIPC_OK || !*skb) | |
e4de5fab | 1660 | return rc; |
b97bf3fd PL |
1661 | } |
1662 | ||
1663 | /* Reject message if there isn't room to queue it */ | |
1186adf7 | 1664 | if (sk_rmem_alloc_get(sk) + (*skb)->truesize >= limit) |
e4de5fab | 1665 | return -TIPC_ERR_OVERLOAD; |
b97bf3fd | 1666 | |
aba79f33 | 1667 | /* Enqueue message */ |
1186adf7 JPM |
1668 | TIPC_SKB_CB(*skb)->handle = NULL; |
1669 | __skb_queue_tail(&sk->sk_receive_queue, *skb); | |
1670 | skb_set_owner_r(*skb, sk); | |
0c3141e9 | 1671 | |
676d2369 | 1672 | sk->sk_data_ready(sk); |
1186adf7 | 1673 | *skb = NULL; |
0c3141e9 AS |
1674 | return TIPC_OK; |
1675 | } | |
b97bf3fd | 1676 | |
0c3141e9 | 1677 | /** |
4f4482dc | 1678 | * tipc_backlog_rcv - handle incoming message from backlog queue |
0c3141e9 | 1679 | * @sk: socket |
a6ca1094 | 1680 | * @skb: message |
0c3141e9 | 1681 | * |
e3a77561 | 1682 | * Caller must hold socket lock |
0c3141e9 AS |
1683 | * |
1684 | * Returns 0 | |
1685 | */ | |
a6ca1094 | 1686 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
0c3141e9 | 1687 | { |
1186adf7 JPM |
1688 | int err; |
1689 | atomic_t *dcnt; | |
1690 | u32 dnode; | |
4f4482dc | 1691 | struct tipc_sock *tsk = tipc_sk(sk); |
34747539 | 1692 | struct net *net = sock_net(sk); |
a6ca1094 | 1693 | uint truesize = skb->truesize; |
0c3141e9 | 1694 | |
1186adf7 JPM |
1695 | err = filter_rcv(sk, &skb); |
1696 | if (likely(!skb)) { | |
1697 | dcnt = &tsk->dupl_rcvcnt; | |
1698 | if (atomic_read(dcnt) < TIPC_CONN_OVERLOAD_LIMIT) | |
1699 | atomic_add(truesize, dcnt); | |
ac0074ee JPM |
1700 | return 0; |
1701 | } | |
1186adf7 JPM |
1702 | if (!err || tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, -err)) |
1703 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); | |
0c3141e9 AS |
1704 | return 0; |
1705 | } | |
1706 | ||
d570d864 | 1707 | /** |
c637c103 JPM |
1708 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
1709 | * inputq and try adding them to socket or backlog queue | |
1710 | * @inputq: list of incoming buffers with potentially different destinations | |
1711 | * @sk: socket where the buffers should be enqueued | |
1712 | * @dport: port number for the socket | |
1713 | * @_skb: returned buffer to be forwarded or rejected, if applicable | |
d570d864 JPM |
1714 | * |
1715 | * Caller must hold socket lock | |
1716 | * | |
c637c103 JPM |
1717 | * Returns TIPC_OK if all buffers enqueued, otherwise -TIPC_ERR_OVERLOAD |
1718 | * or -TIPC_ERR_NO_PORT | |
d570d864 | 1719 | */ |
c637c103 JPM |
1720 | static int tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
1721 | u32 dport, struct sk_buff **_skb) | |
d570d864 JPM |
1722 | { |
1723 | unsigned int lim; | |
1724 | atomic_t *dcnt; | |
c637c103 JPM |
1725 | int err; |
1726 | struct sk_buff *skb; | |
1727 | unsigned long time_limit = jiffies + 2; | |
1728 | ||
1729 | while (skb_queue_len(inputq)) { | |
51a00daf JPM |
1730 | if (unlikely(time_after_eq(jiffies, time_limit))) |
1731 | return TIPC_OK; | |
c637c103 JPM |
1732 | skb = tipc_skb_dequeue(inputq, dport); |
1733 | if (unlikely(!skb)) | |
1734 | return TIPC_OK; | |
c637c103 JPM |
1735 | if (!sock_owned_by_user(sk)) { |
1736 | err = filter_rcv(sk, &skb); | |
1737 | if (likely(!skb)) | |
1738 | continue; | |
1739 | *_skb = skb; | |
1740 | return err; | |
1741 | } | |
1742 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; | |
1743 | if (sk->sk_backlog.len) | |
1744 | atomic_set(dcnt, 0); | |
1745 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); | |
1746 | if (likely(!sk_add_backlog(sk, skb, lim))) | |
1747 | continue; | |
1748 | *_skb = skb; | |
d570d864 | 1749 | return -TIPC_ERR_OVERLOAD; |
c637c103 | 1750 | } |
d570d864 JPM |
1751 | return TIPC_OK; |
1752 | } | |
1753 | ||
0c3141e9 | 1754 | /** |
c637c103 JPM |
1755 | * tipc_sk_rcv - handle a chain of incoming buffers |
1756 | * @inputq: buffer list containing the buffers | |
1757 | * Consumes all buffers in list until inputq is empty | |
1758 | * Note: may be called in multiple threads referring to the same queue | |
1759 | * Returns 0 if last buffer was accepted, otherwise -EHOSTUNREACH | |
1760 | * Only node local calls check the return value, sending single-buffer queues | |
0c3141e9 | 1761 | */ |
c637c103 | 1762 | int tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
0c3141e9 | 1763 | { |
c637c103 | 1764 | u32 dnode, dport = 0; |
9871b27f | 1765 | int err; |
c637c103 | 1766 | struct sk_buff *skb; |
9816f061 | 1767 | struct tipc_sock *tsk; |
c5898636 | 1768 | struct tipc_net *tn; |
9816f061 | 1769 | struct sock *sk; |
9816f061 | 1770 | |
c637c103 | 1771 | while (skb_queue_len(inputq)) { |
9871b27f | 1772 | err = -TIPC_ERR_NO_PORT; |
c637c103 JPM |
1773 | skb = NULL; |
1774 | dport = tipc_skb_peek_port(inputq, dport); | |
1775 | tsk = tipc_sk_lookup(net, dport); | |
1776 | if (likely(tsk)) { | |
1777 | sk = &tsk->sk; | |
1778 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { | |
1779 | err = tipc_sk_enqueue(inputq, sk, dport, &skb); | |
1780 | spin_unlock_bh(&sk->sk_lock.slock); | |
1781 | dport = 0; | |
1782 | } | |
1783 | sock_put(sk); | |
1784 | } else { | |
1785 | skb = tipc_skb_dequeue(inputq, dport); | |
1786 | } | |
1787 | if (likely(!skb)) | |
1788 | continue; | |
1789 | if (tipc_msg_lookup_dest(net, skb, &dnode, &err)) | |
1790 | goto xmit; | |
1791 | if (!err) { | |
1792 | dnode = msg_destnode(buf_msg(skb)); | |
1793 | goto xmit; | |
1794 | } | |
1795 | tn = net_generic(net, tipc_net_id); | |
1796 | if (!tipc_msg_reverse(tn->own_addr, skb, &dnode, -err)) | |
1797 | continue; | |
e3a77561 | 1798 | xmit: |
c637c103 JPM |
1799 | tipc_link_xmit_skb(net, skb, dnode, dport); |
1800 | } | |
1186adf7 | 1801 | return err ? -EHOSTUNREACH : 0; |
b97bf3fd PL |
1802 | } |
1803 | ||
78eb3a53 YX |
1804 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
1805 | { | |
1806 | struct sock *sk = sock->sk; | |
1807 | DEFINE_WAIT(wait); | |
1808 | int done; | |
1809 | ||
1810 | do { | |
1811 | int err = sock_error(sk); | |
1812 | if (err) | |
1813 | return err; | |
1814 | if (!*timeo_p) | |
1815 | return -ETIMEDOUT; | |
1816 | if (signal_pending(current)) | |
1817 | return sock_intr_errno(*timeo_p); | |
1818 | ||
1819 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
1820 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); | |
1821 | finish_wait(sk_sleep(sk), &wait); | |
1822 | } while (!done); | |
1823 | return 0; | |
1824 | } | |
1825 | ||
b97bf3fd | 1826 | /** |
247f0f3c | 1827 | * tipc_connect - establish a connection to another TIPC port |
b97bf3fd PL |
1828 | * @sock: socket structure |
1829 | * @dest: socket address for destination port | |
1830 | * @destlen: size of socket address data structure | |
0c3141e9 | 1831 | * @flags: file-related flags associated with socket |
b97bf3fd PL |
1832 | * |
1833 | * Returns 0 on success, errno otherwise | |
1834 | */ | |
247f0f3c YX |
1835 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
1836 | int destlen, int flags) | |
b97bf3fd | 1837 | { |
0c3141e9 | 1838 | struct sock *sk = sock->sk; |
f2f8036e | 1839 | struct tipc_sock *tsk = tipc_sk(sk); |
b89741a0 AS |
1840 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
1841 | struct msghdr m = {NULL,}; | |
f2f8036e | 1842 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
78eb3a53 | 1843 | socket_state previous; |
f2f8036e | 1844 | int res = 0; |
b89741a0 | 1845 | |
0c3141e9 AS |
1846 | lock_sock(sk); |
1847 | ||
f2f8036e | 1848 | /* DGRAM/RDM connect(), just save the destaddr */ |
0c3141e9 | 1849 | if (sock->state == SS_READY) { |
f2f8036e EH |
1850 | if (dst->family == AF_UNSPEC) { |
1851 | memset(&tsk->remote, 0, sizeof(struct sockaddr_tipc)); | |
1852 | tsk->connected = 0; | |
610600c8 SL |
1853 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
1854 | res = -EINVAL; | |
f2f8036e EH |
1855 | } else { |
1856 | memcpy(&tsk->remote, dest, destlen); | |
1857 | tsk->connected = 1; | |
1858 | } | |
0c3141e9 AS |
1859 | goto exit; |
1860 | } | |
b89741a0 | 1861 | |
b89741a0 AS |
1862 | /* |
1863 | * Reject connection attempt using multicast address | |
1864 | * | |
1865 | * Note: send_msg() validates the rest of the address fields, | |
1866 | * so there's no need to do it here | |
1867 | */ | |
0c3141e9 AS |
1868 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
1869 | res = -EINVAL; | |
1870 | goto exit; | |
1871 | } | |
1872 | ||
78eb3a53 | 1873 | previous = sock->state; |
584d24b3 YX |
1874 | switch (sock->state) { |
1875 | case SS_UNCONNECTED: | |
1876 | /* Send a 'SYN-' to destination */ | |
1877 | m.msg_name = dest; | |
1878 | m.msg_namelen = destlen; | |
1879 | ||
1880 | /* If connect is in non-blocking case, set MSG_DONTWAIT to | |
1881 | * indicate send_msg() is never blocked. | |
1882 | */ | |
1883 | if (!timeout) | |
1884 | m.msg_flags = MSG_DONTWAIT; | |
1885 | ||
39a0295f | 1886 | res = __tipc_sendmsg(sock, &m, 0); |
584d24b3 YX |
1887 | if ((res < 0) && (res != -EWOULDBLOCK)) |
1888 | goto exit; | |
1889 | ||
1890 | /* Just entered SS_CONNECTING state; the only | |
1891 | * difference is that return value in non-blocking | |
1892 | * case is EINPROGRESS, rather than EALREADY. | |
1893 | */ | |
1894 | res = -EINPROGRESS; | |
584d24b3 | 1895 | case SS_CONNECTING: |
78eb3a53 YX |
1896 | if (previous == SS_CONNECTING) |
1897 | res = -EALREADY; | |
1898 | if (!timeout) | |
1899 | goto exit; | |
1900 | timeout = msecs_to_jiffies(timeout); | |
1901 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ | |
1902 | res = tipc_wait_for_connect(sock, &timeout); | |
584d24b3 YX |
1903 | break; |
1904 | case SS_CONNECTED: | |
1905 | res = -EISCONN; | |
1906 | break; | |
1907 | default: | |
1908 | res = -EINVAL; | |
78eb3a53 | 1909 | break; |
b89741a0 | 1910 | } |
0c3141e9 AS |
1911 | exit: |
1912 | release_sock(sk); | |
b89741a0 | 1913 | return res; |
b97bf3fd PL |
1914 | } |
1915 | ||
c4307285 | 1916 | /** |
247f0f3c | 1917 | * tipc_listen - allow socket to listen for incoming connections |
b97bf3fd PL |
1918 | * @sock: socket structure |
1919 | * @len: (unused) | |
c4307285 | 1920 | * |
b97bf3fd PL |
1921 | * Returns 0 on success, errno otherwise |
1922 | */ | |
247f0f3c | 1923 | static int tipc_listen(struct socket *sock, int len) |
b97bf3fd | 1924 | { |
0c3141e9 AS |
1925 | struct sock *sk = sock->sk; |
1926 | int res; | |
1927 | ||
1928 | lock_sock(sk); | |
b97bf3fd | 1929 | |
245f3d34 | 1930 | if (sock->state != SS_UNCONNECTED) |
0c3141e9 AS |
1931 | res = -EINVAL; |
1932 | else { | |
1933 | sock->state = SS_LISTENING; | |
1934 | res = 0; | |
1935 | } | |
1936 | ||
1937 | release_sock(sk); | |
1938 | return res; | |
b97bf3fd PL |
1939 | } |
1940 | ||
6398e23c YX |
1941 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
1942 | { | |
1943 | struct sock *sk = sock->sk; | |
1944 | DEFINE_WAIT(wait); | |
1945 | int err; | |
1946 | ||
1947 | /* True wake-one mechanism for incoming connections: only | |
1948 | * one process gets woken up, not the 'whole herd'. | |
1949 | * Since we do not 'race & poll' for established sockets | |
1950 | * anymore, the common case will execute the loop only once. | |
1951 | */ | |
1952 | for (;;) { | |
1953 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, | |
1954 | TASK_INTERRUPTIBLE); | |
fe8e4649 | 1955 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
6398e23c YX |
1956 | release_sock(sk); |
1957 | timeo = schedule_timeout(timeo); | |
1958 | lock_sock(sk); | |
1959 | } | |
1960 | err = 0; | |
1961 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
1962 | break; | |
1963 | err = -EINVAL; | |
1964 | if (sock->state != SS_LISTENING) | |
1965 | break; | |
6398e23c YX |
1966 | err = -EAGAIN; |
1967 | if (!timeo) | |
1968 | break; | |
143fe22f EH |
1969 | err = sock_intr_errno(timeo); |
1970 | if (signal_pending(current)) | |
1971 | break; | |
6398e23c YX |
1972 | } |
1973 | finish_wait(sk_sleep(sk), &wait); | |
1974 | return err; | |
1975 | } | |
1976 | ||
c4307285 | 1977 | /** |
247f0f3c | 1978 | * tipc_accept - wait for connection request |
b97bf3fd PL |
1979 | * @sock: listening socket |
1980 | * @newsock: new socket that is to be connected | |
1981 | * @flags: file-related flags associated with socket | |
c4307285 | 1982 | * |
b97bf3fd PL |
1983 | * Returns 0 on success, errno otherwise |
1984 | */ | |
247f0f3c | 1985 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
b97bf3fd | 1986 | { |
0fef8f20 | 1987 | struct sock *new_sk, *sk = sock->sk; |
b97bf3fd | 1988 | struct sk_buff *buf; |
301bae56 | 1989 | struct tipc_sock *new_tsock; |
0fef8f20 | 1990 | struct tipc_msg *msg; |
6398e23c | 1991 | long timeo; |
0c3141e9 | 1992 | int res; |
b97bf3fd | 1993 | |
0c3141e9 | 1994 | lock_sock(sk); |
b97bf3fd | 1995 | |
0c3141e9 AS |
1996 | if (sock->state != SS_LISTENING) { |
1997 | res = -EINVAL; | |
b97bf3fd PL |
1998 | goto exit; |
1999 | } | |
6398e23c YX |
2000 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
2001 | res = tipc_wait_for_accept(sock, timeo); | |
2002 | if (res) | |
2003 | goto exit; | |
0c3141e9 AS |
2004 | |
2005 | buf = skb_peek(&sk->sk_receive_queue); | |
2006 | ||
c5fa7b3c | 2007 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
0fef8f20 PG |
2008 | if (res) |
2009 | goto exit; | |
b97bf3fd | 2010 | |
0fef8f20 | 2011 | new_sk = new_sock->sk; |
301bae56 | 2012 | new_tsock = tipc_sk(new_sk); |
0fef8f20 | 2013 | msg = buf_msg(buf); |
b97bf3fd | 2014 | |
0fef8f20 PG |
2015 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
2016 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); | |
2017 | ||
2018 | /* | |
2019 | * Reject any stray messages received by new socket | |
2020 | * before the socket lock was taken (very, very unlikely) | |
2021 | */ | |
2e84c60b | 2022 | tsk_rej_rx_queue(new_sk); |
0fef8f20 PG |
2023 | |
2024 | /* Connect new socket to it's peer */ | |
301bae56 | 2025 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
0fef8f20 PG |
2026 | new_sock->state = SS_CONNECTED; |
2027 | ||
301bae56 | 2028 | tsk_set_importance(new_tsock, msg_importance(msg)); |
0fef8f20 | 2029 | if (msg_named(msg)) { |
301bae56 JPM |
2030 | new_tsock->conn_type = msg_nametype(msg); |
2031 | new_tsock->conn_instance = msg_nameinst(msg); | |
b97bf3fd | 2032 | } |
0fef8f20 PG |
2033 | |
2034 | /* | |
2035 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. | |
2036 | * Respond to 'SYN+' by queuing it on new socket. | |
2037 | */ | |
2038 | if (!msg_data_sz(msg)) { | |
2039 | struct msghdr m = {NULL,}; | |
2040 | ||
2e84c60b | 2041 | tsk_advance_rx_queue(sk); |
39a0295f | 2042 | __tipc_send_stream(new_sock, &m, 0); |
0fef8f20 PG |
2043 | } else { |
2044 | __skb_dequeue(&sk->sk_receive_queue); | |
2045 | __skb_queue_head(&new_sk->sk_receive_queue, buf); | |
aba79f33 | 2046 | skb_set_owner_r(buf, new_sk); |
0fef8f20 PG |
2047 | } |
2048 | release_sock(new_sk); | |
b97bf3fd | 2049 | exit: |
0c3141e9 | 2050 | release_sock(sk); |
b97bf3fd PL |
2051 | return res; |
2052 | } | |
2053 | ||
2054 | /** | |
247f0f3c | 2055 | * tipc_shutdown - shutdown socket connection |
b97bf3fd | 2056 | * @sock: socket structure |
e247a8f5 | 2057 | * @how: direction to close (must be SHUT_RDWR) |
b97bf3fd PL |
2058 | * |
2059 | * Terminates connection (if necessary), then purges socket's receive queue. | |
c4307285 | 2060 | * |
b97bf3fd PL |
2061 | * Returns 0 on success, errno otherwise |
2062 | */ | |
247f0f3c | 2063 | static int tipc_shutdown(struct socket *sock, int how) |
b97bf3fd | 2064 | { |
0c3141e9 | 2065 | struct sock *sk = sock->sk; |
f2f9800d | 2066 | struct net *net = sock_net(sk); |
58ed9442 | 2067 | struct tipc_sock *tsk = tipc_sk(sk); |
a6ca1094 | 2068 | struct sk_buff *skb; |
80e44c22 | 2069 | u32 dnode; |
b97bf3fd PL |
2070 | int res; |
2071 | ||
e247a8f5 AS |
2072 | if (how != SHUT_RDWR) |
2073 | return -EINVAL; | |
b97bf3fd | 2074 | |
0c3141e9 | 2075 | lock_sock(sk); |
b97bf3fd PL |
2076 | |
2077 | switch (sock->state) { | |
0c3141e9 | 2078 | case SS_CONNECTING: |
b97bf3fd PL |
2079 | case SS_CONNECTED: |
2080 | ||
b97bf3fd | 2081 | restart: |
617d3c7a | 2082 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
a6ca1094 YX |
2083 | skb = __skb_dequeue(&sk->sk_receive_queue); |
2084 | if (skb) { | |
2085 | if (TIPC_SKB_CB(skb)->handle != NULL) { | |
2086 | kfree_skb(skb); | |
b97bf3fd PL |
2087 | goto restart; |
2088 | } | |
c5898636 | 2089 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
34747539 | 2090 | TIPC_CONN_SHUTDOWN)) |
f2f9800d YX |
2091 | tipc_link_xmit_skb(net, skb, dnode, |
2092 | tsk->portid); | |
0c3141e9 | 2093 | } else { |
301bae56 | 2094 | dnode = tsk_peer_node(tsk); |
c5898636 JPM |
2095 | |
2096 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, | |
80e44c22 | 2097 | TIPC_CONN_MSG, SHORT_H_SIZE, |
c5898636 | 2098 | 0, dnode, tsk_own_node(tsk), |
301bae56 | 2099 | tsk_peer_port(tsk), |
07f6c4bc | 2100 | tsk->portid, TIPC_CONN_SHUTDOWN); |
f2f9800d | 2101 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
b97bf3fd | 2102 | } |
301bae56 | 2103 | tsk->connected = 0; |
0c3141e9 | 2104 | sock->state = SS_DISCONNECTING; |
f2f9800d | 2105 | tipc_node_remove_conn(net, dnode, tsk->portid); |
b97bf3fd PL |
2106 | /* fall through */ |
2107 | ||
2108 | case SS_DISCONNECTING: | |
2109 | ||
75031151 | 2110 | /* Discard any unreceived messages */ |
57467e56 | 2111 | __skb_queue_purge(&sk->sk_receive_queue); |
75031151 YX |
2112 | |
2113 | /* Wake up anyone sleeping in poll */ | |
2114 | sk->sk_state_change(sk); | |
b97bf3fd PL |
2115 | res = 0; |
2116 | break; | |
2117 | ||
2118 | default: | |
2119 | res = -ENOTCONN; | |
2120 | } | |
2121 | ||
0c3141e9 | 2122 | release_sock(sk); |
b97bf3fd PL |
2123 | return res; |
2124 | } | |
2125 | ||
f2f2a96a | 2126 | static void tipc_sk_timeout(unsigned long data) |
57289015 | 2127 | { |
f2f2a96a YX |
2128 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
2129 | struct sock *sk = &tsk->sk; | |
a6ca1094 | 2130 | struct sk_buff *skb = NULL; |
57289015 | 2131 | u32 peer_port, peer_node; |
c5898636 | 2132 | u32 own_node = tsk_own_node(tsk); |
57289015 | 2133 | |
6c9808ce | 2134 | bh_lock_sock(sk); |
301bae56 | 2135 | if (!tsk->connected) { |
6c9808ce JPM |
2136 | bh_unlock_sock(sk); |
2137 | goto exit; | |
57289015 | 2138 | } |
301bae56 JPM |
2139 | peer_port = tsk_peer_port(tsk); |
2140 | peer_node = tsk_peer_node(tsk); | |
57289015 | 2141 | |
301bae56 | 2142 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
b3be5e3e EH |
2143 | if (!sock_owned_by_user(sk)) { |
2144 | sk->sk_socket->state = SS_DISCONNECTING; | |
2145 | tsk->connected = 0; | |
2146 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), | |
2147 | tsk_peer_port(tsk)); | |
2148 | sk->sk_state_change(sk); | |
2149 | } else { | |
2150 | /* Try again later */ | |
2151 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); | |
2152 | } | |
2153 | ||
57289015 | 2154 | } else { |
c5898636 JPM |
2155 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
2156 | INT_H_SIZE, 0, peer_node, own_node, | |
f2f2a96a | 2157 | peer_port, tsk->portid, TIPC_OK); |
301bae56 | 2158 | tsk->probing_state = TIPC_CONN_PROBING; |
3721e9c7 | 2159 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
57289015 JPM |
2160 | } |
2161 | bh_unlock_sock(sk); | |
a6ca1094 | 2162 | if (skb) |
f2f9800d | 2163 | tipc_link_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
6c9808ce | 2164 | exit: |
07f6c4bc | 2165 | sock_put(sk); |
57289015 JPM |
2166 | } |
2167 | ||
301bae56 | 2168 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2169 | struct tipc_name_seq const *seq) |
2170 | { | |
f2f9800d | 2171 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2172 | struct publication *publ; |
2173 | u32 key; | |
2174 | ||
301bae56 | 2175 | if (tsk->connected) |
0fc87aae | 2176 | return -EINVAL; |
07f6c4bc YX |
2177 | key = tsk->portid + tsk->pub_count + 1; |
2178 | if (key == tsk->portid) | |
0fc87aae JPM |
2179 | return -EADDRINUSE; |
2180 | ||
f2f9800d | 2181 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
07f6c4bc | 2182 | scope, tsk->portid, key); |
0fc87aae JPM |
2183 | if (unlikely(!publ)) |
2184 | return -EINVAL; | |
2185 | ||
301bae56 JPM |
2186 | list_add(&publ->pport_list, &tsk->publications); |
2187 | tsk->pub_count++; | |
2188 | tsk->published = 1; | |
0fc87aae JPM |
2189 | return 0; |
2190 | } | |
2191 | ||
301bae56 | 2192 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
0fc87aae JPM |
2193 | struct tipc_name_seq const *seq) |
2194 | { | |
f2f9800d | 2195 | struct net *net = sock_net(&tsk->sk); |
0fc87aae JPM |
2196 | struct publication *publ; |
2197 | struct publication *safe; | |
2198 | int rc = -EINVAL; | |
2199 | ||
301bae56 | 2200 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
0fc87aae JPM |
2201 | if (seq) { |
2202 | if (publ->scope != scope) | |
2203 | continue; | |
2204 | if (publ->type != seq->type) | |
2205 | continue; | |
2206 | if (publ->lower != seq->lower) | |
2207 | continue; | |
2208 | if (publ->upper != seq->upper) | |
2209 | break; | |
f2f9800d | 2210 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2211 | publ->ref, publ->key); |
2212 | rc = 0; | |
2213 | break; | |
2214 | } | |
f2f9800d | 2215 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
0fc87aae JPM |
2216 | publ->ref, publ->key); |
2217 | rc = 0; | |
2218 | } | |
301bae56 JPM |
2219 | if (list_empty(&tsk->publications)) |
2220 | tsk->published = 0; | |
0fc87aae JPM |
2221 | return rc; |
2222 | } | |
2223 | ||
5a9ee0be JPM |
2224 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
2225 | * when we go from standalone to network mode. | |
2226 | */ | |
e05b31f4 | 2227 | void tipc_sk_reinit(struct net *net) |
5a9ee0be | 2228 | { |
e05b31f4 | 2229 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc YX |
2230 | const struct bucket_table *tbl; |
2231 | struct rhash_head *pos; | |
2232 | struct tipc_sock *tsk; | |
5a9ee0be | 2233 | struct tipc_msg *msg; |
07f6c4bc | 2234 | int i; |
5a9ee0be | 2235 | |
07f6c4bc | 2236 | rcu_read_lock(); |
e05b31f4 | 2237 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
07f6c4bc YX |
2238 | for (i = 0; i < tbl->size; i++) { |
2239 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { | |
2240 | spin_lock_bh(&tsk->sk.sk_lock.slock); | |
2241 | msg = &tsk->phdr; | |
34747539 YX |
2242 | msg_set_prevnode(msg, tn->own_addr); |
2243 | msg_set_orignode(msg, tn->own_addr); | |
07f6c4bc YX |
2244 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
2245 | } | |
5a9ee0be | 2246 | } |
07f6c4bc | 2247 | rcu_read_unlock(); |
5a9ee0be JPM |
2248 | } |
2249 | ||
e05b31f4 | 2250 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
808d90f9 | 2251 | { |
e05b31f4 | 2252 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
07f6c4bc | 2253 | struct tipc_sock *tsk; |
808d90f9 | 2254 | |
07f6c4bc | 2255 | rcu_read_lock(); |
6cca7289 | 2256 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
07f6c4bc YX |
2257 | if (tsk) |
2258 | sock_hold(&tsk->sk); | |
2259 | rcu_read_unlock(); | |
808d90f9 | 2260 | |
07f6c4bc | 2261 | return tsk; |
808d90f9 JPM |
2262 | } |
2263 | ||
07f6c4bc | 2264 | static int tipc_sk_insert(struct tipc_sock *tsk) |
808d90f9 | 2265 | { |
e05b31f4 YX |
2266 | struct sock *sk = &tsk->sk; |
2267 | struct net *net = sock_net(sk); | |
2268 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
07f6c4bc YX |
2269 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
2270 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; | |
808d90f9 | 2271 | |
07f6c4bc YX |
2272 | while (remaining--) { |
2273 | portid++; | |
2274 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) | |
2275 | portid = TIPC_MIN_PORT; | |
2276 | tsk->portid = portid; | |
2277 | sock_hold(&tsk->sk); | |
6cca7289 HX |
2278 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
2279 | tsk_rht_params)) | |
07f6c4bc YX |
2280 | return 0; |
2281 | sock_put(&tsk->sk); | |
808d90f9 JPM |
2282 | } |
2283 | ||
07f6c4bc | 2284 | return -1; |
808d90f9 JPM |
2285 | } |
2286 | ||
07f6c4bc | 2287 | static void tipc_sk_remove(struct tipc_sock *tsk) |
808d90f9 | 2288 | { |
07f6c4bc | 2289 | struct sock *sk = &tsk->sk; |
e05b31f4 | 2290 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
808d90f9 | 2291 | |
6cca7289 | 2292 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
07f6c4bc YX |
2293 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
2294 | __sock_put(sk); | |
808d90f9 | 2295 | } |
808d90f9 JPM |
2296 | } |
2297 | ||
6cca7289 HX |
2298 | static const struct rhashtable_params tsk_rht_params = { |
2299 | .nelem_hint = 192, | |
2300 | .head_offset = offsetof(struct tipc_sock, node), | |
2301 | .key_offset = offsetof(struct tipc_sock, portid), | |
2302 | .key_len = sizeof(u32), /* portid */ | |
6cca7289 HX |
2303 | .max_size = 1048576, |
2304 | .min_size = 256, | |
b5e2c150 | 2305 | .automatic_shrinking = true, |
6cca7289 HX |
2306 | }; |
2307 | ||
e05b31f4 | 2308 | int tipc_sk_rht_init(struct net *net) |
808d90f9 | 2309 | { |
e05b31f4 | 2310 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
6cca7289 HX |
2311 | |
2312 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); | |
808d90f9 JPM |
2313 | } |
2314 | ||
e05b31f4 | 2315 | void tipc_sk_rht_destroy(struct net *net) |
808d90f9 | 2316 | { |
e05b31f4 YX |
2317 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
2318 | ||
07f6c4bc YX |
2319 | /* Wait for socket readers to complete */ |
2320 | synchronize_net(); | |
808d90f9 | 2321 | |
e05b31f4 | 2322 | rhashtable_destroy(&tn->sk_rht); |
808d90f9 JPM |
2323 | } |
2324 | ||
b97bf3fd | 2325 | /** |
247f0f3c | 2326 | * tipc_setsockopt - set socket option |
b97bf3fd PL |
2327 | * @sock: socket structure |
2328 | * @lvl: option level | |
2329 | * @opt: option identifier | |
2330 | * @ov: pointer to new option value | |
2331 | * @ol: length of option value | |
c4307285 YH |
2332 | * |
2333 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options | |
b97bf3fd | 2334 | * (to ease compatibility). |
c4307285 | 2335 | * |
b97bf3fd PL |
2336 | * Returns 0 on success, errno otherwise |
2337 | */ | |
247f0f3c YX |
2338 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
2339 | char __user *ov, unsigned int ol) | |
b97bf3fd | 2340 | { |
0c3141e9 | 2341 | struct sock *sk = sock->sk; |
58ed9442 | 2342 | struct tipc_sock *tsk = tipc_sk(sk); |
b97bf3fd PL |
2343 | u32 value; |
2344 | int res; | |
2345 | ||
c4307285 YH |
2346 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2347 | return 0; | |
b97bf3fd PL |
2348 | if (lvl != SOL_TIPC) |
2349 | return -ENOPROTOOPT; | |
2350 | if (ol < sizeof(value)) | |
2351 | return -EINVAL; | |
2db9983a AS |
2352 | res = get_user(value, (u32 __user *)ov); |
2353 | if (res) | |
b97bf3fd PL |
2354 | return res; |
2355 | ||
0c3141e9 | 2356 | lock_sock(sk); |
c4307285 | 2357 | |
b97bf3fd PL |
2358 | switch (opt) { |
2359 | case TIPC_IMPORTANCE: | |
301bae56 | 2360 | res = tsk_set_importance(tsk, value); |
b97bf3fd PL |
2361 | break; |
2362 | case TIPC_SRC_DROPPABLE: | |
2363 | if (sock->type != SOCK_STREAM) | |
301bae56 | 2364 | tsk_set_unreliable(tsk, value); |
c4307285 | 2365 | else |
b97bf3fd PL |
2366 | res = -ENOPROTOOPT; |
2367 | break; | |
2368 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2369 | tsk_set_unreturnable(tsk, value); |
b97bf3fd PL |
2370 | break; |
2371 | case TIPC_CONN_TIMEOUT: | |
a0f40f02 | 2372 | tipc_sk(sk)->conn_timeout = value; |
0c3141e9 | 2373 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd PL |
2374 | break; |
2375 | default: | |
2376 | res = -EINVAL; | |
2377 | } | |
2378 | ||
0c3141e9 AS |
2379 | release_sock(sk); |
2380 | ||
b97bf3fd PL |
2381 | return res; |
2382 | } | |
2383 | ||
2384 | /** | |
247f0f3c | 2385 | * tipc_getsockopt - get socket option |
b97bf3fd PL |
2386 | * @sock: socket structure |
2387 | * @lvl: option level | |
2388 | * @opt: option identifier | |
2389 | * @ov: receptacle for option value | |
2390 | * @ol: receptacle for length of option value | |
c4307285 YH |
2391 | * |
2392 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options | |
b97bf3fd | 2393 | * (to ease compatibility). |
c4307285 | 2394 | * |
b97bf3fd PL |
2395 | * Returns 0 on success, errno otherwise |
2396 | */ | |
247f0f3c YX |
2397 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
2398 | char __user *ov, int __user *ol) | |
b97bf3fd | 2399 | { |
0c3141e9 | 2400 | struct sock *sk = sock->sk; |
58ed9442 | 2401 | struct tipc_sock *tsk = tipc_sk(sk); |
c4307285 | 2402 | int len; |
b97bf3fd | 2403 | u32 value; |
c4307285 | 2404 | int res; |
b97bf3fd | 2405 | |
c4307285 YH |
2406 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
2407 | return put_user(0, ol); | |
b97bf3fd PL |
2408 | if (lvl != SOL_TIPC) |
2409 | return -ENOPROTOOPT; | |
2db9983a AS |
2410 | res = get_user(len, ol); |
2411 | if (res) | |
c4307285 | 2412 | return res; |
b97bf3fd | 2413 | |
0c3141e9 | 2414 | lock_sock(sk); |
b97bf3fd PL |
2415 | |
2416 | switch (opt) { | |
2417 | case TIPC_IMPORTANCE: | |
301bae56 | 2418 | value = tsk_importance(tsk); |
b97bf3fd PL |
2419 | break; |
2420 | case TIPC_SRC_DROPPABLE: | |
301bae56 | 2421 | value = tsk_unreliable(tsk); |
b97bf3fd PL |
2422 | break; |
2423 | case TIPC_DEST_DROPPABLE: | |
301bae56 | 2424 | value = tsk_unreturnable(tsk); |
b97bf3fd PL |
2425 | break; |
2426 | case TIPC_CONN_TIMEOUT: | |
301bae56 | 2427 | value = tsk->conn_timeout; |
0c3141e9 | 2428 | /* no need to set "res", since already 0 at this point */ |
b97bf3fd | 2429 | break; |
0e65967e | 2430 | case TIPC_NODE_RECVQ_DEPTH: |
9da3d475 | 2431 | value = 0; /* was tipc_queue_size, now obsolete */ |
6650613d | 2432 | break; |
0e65967e | 2433 | case TIPC_SOCK_RECVQ_DEPTH: |
6650613d | 2434 | value = skb_queue_len(&sk->sk_receive_queue); |
2435 | break; | |
b97bf3fd PL |
2436 | default: |
2437 | res = -EINVAL; | |
2438 | } | |
2439 | ||
0c3141e9 AS |
2440 | release_sock(sk); |
2441 | ||
25860c3b PG |
2442 | if (res) |
2443 | return res; /* "get" failed */ | |
b97bf3fd | 2444 | |
25860c3b PG |
2445 | if (len < sizeof(value)) |
2446 | return -EINVAL; | |
2447 | ||
2448 | if (copy_to_user(ov, &value, sizeof(value))) | |
2449 | return -EFAULT; | |
2450 | ||
2451 | return put_user(sizeof(value), ol); | |
b97bf3fd PL |
2452 | } |
2453 | ||
f2f9800d | 2454 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
78acb1f9 | 2455 | { |
f2f9800d | 2456 | struct sock *sk = sock->sk; |
78acb1f9 EH |
2457 | struct tipc_sioc_ln_req lnr; |
2458 | void __user *argp = (void __user *)arg; | |
2459 | ||
2460 | switch (cmd) { | |
2461 | case SIOCGETLINKNAME: | |
2462 | if (copy_from_user(&lnr, argp, sizeof(lnr))) | |
2463 | return -EFAULT; | |
f2f9800d YX |
2464 | if (!tipc_node_get_linkname(sock_net(sk), |
2465 | lnr.bearer_id & 0xffff, lnr.peer, | |
78acb1f9 EH |
2466 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
2467 | if (copy_to_user(argp, &lnr, sizeof(lnr))) | |
2468 | return -EFAULT; | |
2469 | return 0; | |
2470 | } | |
2471 | return -EADDRNOTAVAIL; | |
78acb1f9 EH |
2472 | default: |
2473 | return -ENOIOCTLCMD; | |
2474 | } | |
2475 | } | |
2476 | ||
ae86b9e3 BH |
2477 | /* Protocol switches for the various types of TIPC sockets */ |
2478 | ||
bca65eae | 2479 | static const struct proto_ops msg_ops = { |
0e65967e | 2480 | .owner = THIS_MODULE, |
b97bf3fd | 2481 | .family = AF_TIPC, |
247f0f3c YX |
2482 | .release = tipc_release, |
2483 | .bind = tipc_bind, | |
2484 | .connect = tipc_connect, | |
5eee6a6d | 2485 | .socketpair = sock_no_socketpair, |
245f3d34 | 2486 | .accept = sock_no_accept, |
247f0f3c YX |
2487 | .getname = tipc_getname, |
2488 | .poll = tipc_poll, | |
78acb1f9 | 2489 | .ioctl = tipc_ioctl, |
245f3d34 | 2490 | .listen = sock_no_listen, |
247f0f3c YX |
2491 | .shutdown = tipc_shutdown, |
2492 | .setsockopt = tipc_setsockopt, | |
2493 | .getsockopt = tipc_getsockopt, | |
2494 | .sendmsg = tipc_sendmsg, | |
2495 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2496 | .mmap = sock_no_mmap, |
2497 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2498 | }; |
2499 | ||
bca65eae | 2500 | static const struct proto_ops packet_ops = { |
0e65967e | 2501 | .owner = THIS_MODULE, |
b97bf3fd | 2502 | .family = AF_TIPC, |
247f0f3c YX |
2503 | .release = tipc_release, |
2504 | .bind = tipc_bind, | |
2505 | .connect = tipc_connect, | |
5eee6a6d | 2506 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2507 | .accept = tipc_accept, |
2508 | .getname = tipc_getname, | |
2509 | .poll = tipc_poll, | |
78acb1f9 | 2510 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2511 | .listen = tipc_listen, |
2512 | .shutdown = tipc_shutdown, | |
2513 | .setsockopt = tipc_setsockopt, | |
2514 | .getsockopt = tipc_getsockopt, | |
2515 | .sendmsg = tipc_send_packet, | |
2516 | .recvmsg = tipc_recvmsg, | |
8238745a YH |
2517 | .mmap = sock_no_mmap, |
2518 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2519 | }; |
2520 | ||
bca65eae | 2521 | static const struct proto_ops stream_ops = { |
0e65967e | 2522 | .owner = THIS_MODULE, |
b97bf3fd | 2523 | .family = AF_TIPC, |
247f0f3c YX |
2524 | .release = tipc_release, |
2525 | .bind = tipc_bind, | |
2526 | .connect = tipc_connect, | |
5eee6a6d | 2527 | .socketpair = sock_no_socketpair, |
247f0f3c YX |
2528 | .accept = tipc_accept, |
2529 | .getname = tipc_getname, | |
2530 | .poll = tipc_poll, | |
78acb1f9 | 2531 | .ioctl = tipc_ioctl, |
247f0f3c YX |
2532 | .listen = tipc_listen, |
2533 | .shutdown = tipc_shutdown, | |
2534 | .setsockopt = tipc_setsockopt, | |
2535 | .getsockopt = tipc_getsockopt, | |
2536 | .sendmsg = tipc_send_stream, | |
2537 | .recvmsg = tipc_recv_stream, | |
8238745a YH |
2538 | .mmap = sock_no_mmap, |
2539 | .sendpage = sock_no_sendpage | |
b97bf3fd PL |
2540 | }; |
2541 | ||
bca65eae | 2542 | static const struct net_proto_family tipc_family_ops = { |
0e65967e | 2543 | .owner = THIS_MODULE, |
b97bf3fd | 2544 | .family = AF_TIPC, |
c5fa7b3c | 2545 | .create = tipc_sk_create |
b97bf3fd PL |
2546 | }; |
2547 | ||
2548 | static struct proto tipc_proto = { | |
2549 | .name = "TIPC", | |
2550 | .owner = THIS_MODULE, | |
cc79dd1b YX |
2551 | .obj_size = sizeof(struct tipc_sock), |
2552 | .sysctl_rmem = sysctl_tipc_rmem | |
b97bf3fd PL |
2553 | }; |
2554 | ||
2555 | /** | |
4323add6 | 2556 | * tipc_socket_init - initialize TIPC socket interface |
c4307285 | 2557 | * |
b97bf3fd PL |
2558 | * Returns 0 on success, errno otherwise |
2559 | */ | |
4323add6 | 2560 | int tipc_socket_init(void) |
b97bf3fd PL |
2561 | { |
2562 | int res; | |
2563 | ||
c4307285 | 2564 | res = proto_register(&tipc_proto, 1); |
b97bf3fd | 2565 | if (res) { |
2cf8aa19 | 2566 | pr_err("Failed to register TIPC protocol type\n"); |
b97bf3fd PL |
2567 | goto out; |
2568 | } | |
2569 | ||
2570 | res = sock_register(&tipc_family_ops); | |
2571 | if (res) { | |
2cf8aa19 | 2572 | pr_err("Failed to register TIPC socket type\n"); |
b97bf3fd PL |
2573 | proto_unregister(&tipc_proto); |
2574 | goto out; | |
2575 | } | |
b97bf3fd PL |
2576 | out: |
2577 | return res; | |
2578 | } | |
2579 | ||
2580 | /** | |
4323add6 | 2581 | * tipc_socket_stop - stop TIPC socket interface |
b97bf3fd | 2582 | */ |
4323add6 | 2583 | void tipc_socket_stop(void) |
b97bf3fd | 2584 | { |
b97bf3fd PL |
2585 | sock_unregister(tipc_family_ops.family); |
2586 | proto_unregister(&tipc_proto); | |
2587 | } | |
34b78a12 RA |
2588 | |
2589 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 | 2590 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
34b78a12 RA |
2591 | { |
2592 | u32 peer_node; | |
2593 | u32 peer_port; | |
2594 | struct nlattr *nest; | |
2595 | ||
2596 | peer_node = tsk_peer_node(tsk); | |
2597 | peer_port = tsk_peer_port(tsk); | |
2598 | ||
2599 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); | |
2600 | ||
2601 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) | |
2602 | goto msg_full; | |
2603 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) | |
2604 | goto msg_full; | |
2605 | ||
2606 | if (tsk->conn_type != 0) { | |
2607 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) | |
2608 | goto msg_full; | |
2609 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) | |
2610 | goto msg_full; | |
2611 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) | |
2612 | goto msg_full; | |
2613 | } | |
2614 | nla_nest_end(skb, nest); | |
2615 | ||
2616 | return 0; | |
2617 | ||
2618 | msg_full: | |
2619 | nla_nest_cancel(skb, nest); | |
2620 | ||
2621 | return -EMSGSIZE; | |
2622 | } | |
2623 | ||
2624 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2625 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
2626 | struct tipc_sock *tsk) | |
34b78a12 RA |
2627 | { |
2628 | int err; | |
2629 | void *hdr; | |
2630 | struct nlattr *attrs; | |
34747539 YX |
2631 | struct net *net = sock_net(skb->sk); |
2632 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
34b78a12 RA |
2633 | |
2634 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2635 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
34b78a12 RA |
2636 | if (!hdr) |
2637 | goto msg_cancel; | |
2638 | ||
2639 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); | |
2640 | if (!attrs) | |
2641 | goto genlmsg_cancel; | |
07f6c4bc | 2642 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
34b78a12 | 2643 | goto attr_msg_cancel; |
34747539 | 2644 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
34b78a12 RA |
2645 | goto attr_msg_cancel; |
2646 | ||
2647 | if (tsk->connected) { | |
2648 | err = __tipc_nl_add_sk_con(skb, tsk); | |
2649 | if (err) | |
2650 | goto attr_msg_cancel; | |
2651 | } else if (!list_empty(&tsk->publications)) { | |
2652 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) | |
2653 | goto attr_msg_cancel; | |
2654 | } | |
2655 | nla_nest_end(skb, attrs); | |
2656 | genlmsg_end(skb, hdr); | |
2657 | ||
2658 | return 0; | |
2659 | ||
2660 | attr_msg_cancel: | |
2661 | nla_nest_cancel(skb, attrs); | |
2662 | genlmsg_cancel: | |
2663 | genlmsg_cancel(skb, hdr); | |
2664 | msg_cancel: | |
2665 | return -EMSGSIZE; | |
2666 | } | |
2667 | ||
2668 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2669 | { | |
2670 | int err; | |
2671 | struct tipc_sock *tsk; | |
07f6c4bc YX |
2672 | const struct bucket_table *tbl; |
2673 | struct rhash_head *pos; | |
e05b31f4 YX |
2674 | struct net *net = sock_net(skb->sk); |
2675 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
d6e164e3 RA |
2676 | u32 tbl_id = cb->args[0]; |
2677 | u32 prev_portid = cb->args[1]; | |
34b78a12 | 2678 | |
07f6c4bc | 2679 | rcu_read_lock(); |
e05b31f4 | 2680 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
d6e164e3 RA |
2681 | for (; tbl_id < tbl->size; tbl_id++) { |
2682 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { | |
07f6c4bc | 2683 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
d6e164e3 RA |
2684 | if (prev_portid && prev_portid != tsk->portid) { |
2685 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2686 | continue; | |
2687 | } | |
2688 | ||
07f6c4bc | 2689 | err = __tipc_nl_add_sk(skb, cb, tsk); |
d6e164e3 RA |
2690 | if (err) { |
2691 | prev_portid = tsk->portid; | |
2692 | spin_unlock_bh(&tsk->sk.sk_lock.slock); | |
2693 | goto out; | |
2694 | } | |
2695 | prev_portid = 0; | |
07f6c4bc | 2696 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
07f6c4bc | 2697 | } |
34b78a12 | 2698 | } |
d6e164e3 | 2699 | out: |
07f6c4bc | 2700 | rcu_read_unlock(); |
d6e164e3 RA |
2701 | cb->args[0] = tbl_id; |
2702 | cb->args[1] = prev_portid; | |
34b78a12 RA |
2703 | |
2704 | return skb->len; | |
2705 | } | |
1a1a143d RA |
2706 | |
2707 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2708 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
2709 | struct netlink_callback *cb, | |
2710 | struct publication *publ) | |
1a1a143d RA |
2711 | { |
2712 | void *hdr; | |
2713 | struct nlattr *attrs; | |
2714 | ||
2715 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, | |
bfb3e5dd | 2716 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
1a1a143d RA |
2717 | if (!hdr) |
2718 | goto msg_cancel; | |
2719 | ||
2720 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); | |
2721 | if (!attrs) | |
2722 | goto genlmsg_cancel; | |
2723 | ||
2724 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) | |
2725 | goto attr_msg_cancel; | |
2726 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) | |
2727 | goto attr_msg_cancel; | |
2728 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) | |
2729 | goto attr_msg_cancel; | |
2730 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) | |
2731 | goto attr_msg_cancel; | |
2732 | ||
2733 | nla_nest_end(skb, attrs); | |
2734 | genlmsg_end(skb, hdr); | |
2735 | ||
2736 | return 0; | |
2737 | ||
2738 | attr_msg_cancel: | |
2739 | nla_nest_cancel(skb, attrs); | |
2740 | genlmsg_cancel: | |
2741 | genlmsg_cancel(skb, hdr); | |
2742 | msg_cancel: | |
2743 | return -EMSGSIZE; | |
2744 | } | |
2745 | ||
2746 | /* Caller should hold socket lock for the passed tipc socket. */ | |
d8182804 RA |
2747 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
2748 | struct netlink_callback *cb, | |
2749 | struct tipc_sock *tsk, u32 *last_publ) | |
1a1a143d RA |
2750 | { |
2751 | int err; | |
2752 | struct publication *p; | |
2753 | ||
2754 | if (*last_publ) { | |
2755 | list_for_each_entry(p, &tsk->publications, pport_list) { | |
2756 | if (p->key == *last_publ) | |
2757 | break; | |
2758 | } | |
2759 | if (p->key != *last_publ) { | |
2760 | /* We never set seq or call nl_dump_check_consistent() | |
2761 | * this means that setting prev_seq here will cause the | |
2762 | * consistence check to fail in the netlink callback | |
2763 | * handler. Resulting in the last NLMSG_DONE message | |
2764 | * having the NLM_F_DUMP_INTR flag set. | |
2765 | */ | |
2766 | cb->prev_seq = 1; | |
2767 | *last_publ = 0; | |
2768 | return -EPIPE; | |
2769 | } | |
2770 | } else { | |
2771 | p = list_first_entry(&tsk->publications, struct publication, | |
2772 | pport_list); | |
2773 | } | |
2774 | ||
2775 | list_for_each_entry_from(p, &tsk->publications, pport_list) { | |
2776 | err = __tipc_nl_add_sk_publ(skb, cb, p); | |
2777 | if (err) { | |
2778 | *last_publ = p->key; | |
2779 | return err; | |
2780 | } | |
2781 | } | |
2782 | *last_publ = 0; | |
2783 | ||
2784 | return 0; | |
2785 | } | |
2786 | ||
2787 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
2788 | { | |
2789 | int err; | |
07f6c4bc | 2790 | u32 tsk_portid = cb->args[0]; |
1a1a143d RA |
2791 | u32 last_publ = cb->args[1]; |
2792 | u32 done = cb->args[2]; | |
e05b31f4 | 2793 | struct net *net = sock_net(skb->sk); |
1a1a143d RA |
2794 | struct tipc_sock *tsk; |
2795 | ||
07f6c4bc | 2796 | if (!tsk_portid) { |
1a1a143d RA |
2797 | struct nlattr **attrs; |
2798 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; | |
2799 | ||
2800 | err = tipc_nlmsg_parse(cb->nlh, &attrs); | |
2801 | if (err) | |
2802 | return err; | |
2803 | ||
2804 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, | |
2805 | attrs[TIPC_NLA_SOCK], | |
2806 | tipc_nl_sock_policy); | |
2807 | if (err) | |
2808 | return err; | |
2809 | ||
2810 | if (!sock[TIPC_NLA_SOCK_REF]) | |
2811 | return -EINVAL; | |
2812 | ||
07f6c4bc | 2813 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
1a1a143d RA |
2814 | } |
2815 | ||
2816 | if (done) | |
2817 | return 0; | |
2818 | ||
e05b31f4 | 2819 | tsk = tipc_sk_lookup(net, tsk_portid); |
1a1a143d RA |
2820 | if (!tsk) |
2821 | return -EINVAL; | |
2822 | ||
2823 | lock_sock(&tsk->sk); | |
2824 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); | |
2825 | if (!err) | |
2826 | done = 1; | |
2827 | release_sock(&tsk->sk); | |
07f6c4bc | 2828 | sock_put(&tsk->sk); |
1a1a143d | 2829 | |
07f6c4bc | 2830 | cb->args[0] = tsk_portid; |
1a1a143d RA |
2831 | cb->args[1] = last_publ; |
2832 | cb->args[2] = done; | |
2833 | ||
2834 | return skb->len; | |
2835 | } |