blob: 3a7567f690f35458f0fe58e0cc1254a4ec8033fa [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
Jon Paul Maloy02c00c22014-06-09 11:08:18 -05002 * net/tipc/socket.c: TIPC socket API
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Jon Paul Maloy3c724ac2015-02-05 08:36:43 -05004 * Copyright (c) 2001-2007, 2012-2015, Ericsson AB
Ying Xuec5fa7b32013-06-17 10:54:39 -04005 * Copyright (c) 2004-2008, 2010-2013, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 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.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * 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
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
Ying Xue07f6c4b2015-01-07 13:41:58 +080037#include <linux/rhashtable.h>
Per Lidenb97bf3f2006-01-02 19:04:38 +010038#include "core.h"
Jon Paul Maloye2dafe82014-06-25 20:41:37 -050039#include "name_table.h"
Erik Hugne78acb1f2014-04-24 16:26:47 +020040#include "node.h"
Jon Paul Maloye2dafe82014-06-25 20:41:37 -050041#include "link.h"
Jon Paul Maloyc637c102015-02-05 08:36:41 -050042#include "name_distr.h"
Jon Paul Maloy2e84c602014-08-22 18:09:18 -040043#include "socket.h"
Jon Paul Maloya6bf70f2015-05-14 10:46:13 -040044#include "bcast.h"
Erik Hugne2cf8aa12012-06-29 00:16:37 -040045
Ying Xue07f6c4b2015-01-07 13:41:58 +080046#define SS_LISTENING -1 /* socket is listening */
47#define SS_READY -2 /* socket is connectionless */
Per Lidenb97bf3f2006-01-02 19:04:38 +010048
Ying Xue07f6c4b2015-01-07 13:41:58 +080049#define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
Ying Xue2f55c432015-01-09 15:27:00 +080050#define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */
Ying Xue07f6c4b2015-01-07 13:41:58 +080051#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
Jon Paul Maloy301bae52014-08-22 18:09:20 -040056
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
Ying Xue07f6c4b2015-01-07 13:41:58 +080065 * @portid: unique port identity in TIPC socket hash table
Jon Paul Maloy301bae52014-08-22 18:09:20 -040066 * @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:
Ying Xue2f55c432015-01-09 15:27:00 +080071 * @probing_intv:
Jon Paul Maloy301bae52014-08-22 18:09:20 -040072 * @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
Erik Hugnef2f80362015-03-19 09:02:19 +010077 * @remote: 'connected' peer for dgram/rdm
Ying Xue07f6c4b2015-01-07 13:41:58 +080078 * @node: hash table node
79 * @rcu: rcu struct for tipc_sock
Jon Paul Maloy301bae52014-08-22 18:09:20 -040080 */
81struct tipc_sock {
82 struct sock sk;
83 int connected;
84 u32 conn_type;
85 u32 conn_instance;
86 int published;
87 u32 max_pkt;
Ying Xue07f6c4b2015-01-07 13:41:58 +080088 u32 portid;
Jon Paul Maloy301bae52014-08-22 18:09:20 -040089 struct tipc_msg phdr;
90 struct list_head sock_list;
91 struct list_head publications;
92 u32 pub_count;
93 u32 probing_state;
Ying Xue2f55c432015-01-09 15:27:00 +080094 unsigned long probing_intv;
Jon Paul Maloy301bae52014-08-22 18:09:20 -040095 uint conn_timeout;
96 atomic_t dupl_rcvcnt;
97 bool link_cong;
98 uint sent_unacked;
99 uint rcv_unacked;
Erik Hugnef2f80362015-03-19 09:02:19 +0100100 struct sockaddr_tipc remote;
Ying Xue07f6c4b2015-01-07 13:41:58 +0800101 struct rhash_head node;
102 struct rcu_head rcu;
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400103};
Per Lidenb97bf3f2006-01-02 19:04:38 +0100104
Jon Paul Maloy4f4482d2014-05-14 05:39:09 -0400105static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb);
David S. Miller676d2362014-04-11 16:15:36 -0400106static void tipc_data_ready(struct sock *sk);
Ying Xuef288bef2012-08-21 11:16:57 +0800107static void tipc_write_space(struct sock *sk);
Ying Xue247f0f32014-02-18 16:06:46 +0800108static int tipc_release(struct socket *sock);
109static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags);
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400110static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p);
Ying Xuef2f2a962015-01-09 15:27:02 +0800111static void tipc_sk_timeout(unsigned long data);
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400112static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -0400113 struct tipc_name_seq const *seq);
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400114static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -0400115 struct tipc_name_seq const *seq);
Ying Xuee05b31f2015-01-09 15:27:08 +0800116static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid);
Ying Xue07f6c4b2015-01-07 13:41:58 +0800117static int tipc_sk_insert(struct tipc_sock *tsk);
118static void tipc_sk_remove(struct tipc_sock *tsk);
Ying Xue39a02952015-03-02 15:37:47 +0800119static int __tipc_send_stream(struct socket *sock, struct msghdr *m,
120 size_t dsz);
121static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100122
Florian Westphalbca65ea2008-02-07 18:18:01 -0800123static const struct proto_ops packet_ops;
124static const struct proto_ops stream_ops;
125static const struct proto_ops msg_ops;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100126static struct proto tipc_proto;
127
Richard Alpe1a1a1432014-11-20 10:29:11 +0100128static 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
Herbert Xu6cca72892015-03-20 21:57:05 +1100136static const struct rhashtable_params tsk_rht_params;
137
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900138/*
Allan Stephens0c3141e2008-04-15 00:22:02 -0700139 * 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
Per Lidenb97bf3f2006-01-02 19:04:38 +0100181 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100182
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500183static u32 tsk_own_node(struct tipc_sock *tsk)
184{
185 return msg_prevnode(&tsk->phdr);
186}
187
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400188static u32 tsk_peer_node(struct tipc_sock *tsk)
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400189{
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400190 return msg_destnode(&tsk->phdr);
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400191}
192
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400193static u32 tsk_peer_port(struct tipc_sock *tsk)
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400194{
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400195 return msg_destport(&tsk->phdr);
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400196}
197
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400198static bool tsk_unreliable(struct tipc_sock *tsk)
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400199{
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400200 return msg_src_droppable(&tsk->phdr) != 0;
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400201}
202
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400203static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable)
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400204{
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400205 msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0);
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400206}
207
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400208static bool tsk_unreturnable(struct tipc_sock *tsk)
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400209{
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400210 return msg_dest_droppable(&tsk->phdr) != 0;
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400211}
212
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400213static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable)
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400214{
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400215 msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0);
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400216}
217
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400218static int tsk_importance(struct tipc_sock *tsk)
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400219{
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400220 return msg_importance(&tsk->phdr);
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400221}
222
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400223static int tsk_set_importance(struct tipc_sock *tsk, int imp)
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400224{
225 if (imp > TIPC_CRITICAL_IMPORTANCE)
226 return -EINVAL;
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400227 msg_set_importance(&tsk->phdr, (u32)imp);
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400228 return 0;
229}
Jon Paul Maloy8826cde2014-03-12 11:31:09 -0400230
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400231static struct tipc_sock *tipc_sk(const struct sock *sk)
232{
233 return container_of(sk, struct tipc_sock, sk);
234}
235
236static int tsk_conn_cong(struct tipc_sock *tsk)
237{
238 return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN;
239}
240
Per Lidenb97bf3f2006-01-02 19:04:38 +0100241/**
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400242 * tsk_advance_rx_queue - discard first buffer in socket receive queue
Allan Stephens0c3141e2008-04-15 00:22:02 -0700243 *
244 * Caller must hold socket lock
Per Lidenb97bf3f2006-01-02 19:04:38 +0100245 */
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400246static void tsk_advance_rx_queue(struct sock *sk)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100247{
Allan Stephens5f6d9122011-11-04 13:24:29 -0400248 kfree_skb(__skb_dequeue(&sk->sk_receive_queue));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100249}
250
251/**
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400252 * tsk_rej_rx_queue - reject all buffers in socket receive queue
Allan Stephens0c3141e2008-04-15 00:22:02 -0700253 *
254 * Caller must hold socket lock
255 */
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400256static void tsk_rej_rx_queue(struct sock *sk)
Allan Stephens0c3141e2008-04-15 00:22:02 -0700257{
Ying Xuea6ca1092014-11-26 11:41:55 +0800258 struct sk_buff *skb;
Jon Paul Maloy8db1bae2014-06-25 20:41:35 -0500259 u32 dnode;
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500260 u32 own_node = tsk_own_node(tipc_sk(sk));
Allan Stephens0c3141e2008-04-15 00:22:02 -0700261
Ying Xuea6ca1092014-11-26 11:41:55 +0800262 while ((skb = __skb_dequeue(&sk->sk_receive_queue))) {
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500263 if (tipc_msg_reverse(own_node, skb, &dnode, TIPC_ERR_NO_PORT))
264 tipc_link_xmit_skb(sock_net(sk), skb, dnode, 0);
Jon Paul Maloy8db1bae2014-06-25 20:41:35 -0500265 }
Allan Stephens0c3141e2008-04-15 00:22:02 -0700266}
267
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400268/* tsk_peer_msg - verify if message was sent by connected port's peer
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -0400269 *
270 * Handles cases where the node's network address has changed from
271 * the default of <0.0.0> to its configured setting.
272 */
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400273static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg)
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -0400274{
Ying Xue34747532015-01-09 15:27:10 +0800275 struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id);
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400276 u32 peer_port = tsk_peer_port(tsk);
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -0400277 u32 orig_node;
278 u32 peer_node;
279
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400280 if (unlikely(!tsk->connected))
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -0400281 return false;
282
283 if (unlikely(msg_origport(msg) != peer_port))
284 return false;
285
286 orig_node = msg_orignode(msg);
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400287 peer_node = tsk_peer_node(tsk);
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -0400288
289 if (likely(orig_node == peer_node))
290 return true;
291
Ying Xue34747532015-01-09 15:27:10 +0800292 if (!orig_node && (peer_node == tn->own_addr))
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -0400293 return true;
294
Ying Xue34747532015-01-09 15:27:10 +0800295 if (!peer_node && (orig_node == tn->own_addr))
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -0400296 return true;
297
298 return false;
299}
300
Allan Stephens0c3141e2008-04-15 00:22:02 -0700301/**
Ying Xuec5fa7b32013-06-17 10:54:39 -0400302 * tipc_sk_create - create a TIPC socket
Allan Stephens0c3141e2008-04-15 00:22:02 -0700303 * @net: network namespace (must be default network)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100304 * @sock: pre-allocated socket structure
305 * @protocol: protocol indicator (must be 0)
Eric Paris3f378b62009-11-05 22:18:14 -0800306 * @kern: caused by kernel or by userspace?
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900307 *
Allan Stephens0c3141e2008-04-15 00:22:02 -0700308 * This routine creates additional data structures used by the TIPC socket,
309 * initializes them, and links them together.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100310 *
311 * Returns 0 on success, errno otherwise
312 */
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400313static int tipc_sk_create(struct net *net, struct socket *sock,
314 int protocol, int kern)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100315{
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500316 struct tipc_net *tn;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700317 const struct proto_ops *ops;
318 socket_state state;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100319 struct sock *sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400320 struct tipc_sock *tsk;
Jon Paul Maloy5b8fa7c2014-08-22 18:09:13 -0400321 struct tipc_msg *msg;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700322
323 /* Validate arguments */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100324 if (unlikely(protocol != 0))
325 return -EPROTONOSUPPORT;
326
Per Lidenb97bf3f2006-01-02 19:04:38 +0100327 switch (sock->type) {
328 case SOCK_STREAM:
Allan Stephens0c3141e2008-04-15 00:22:02 -0700329 ops = &stream_ops;
330 state = SS_UNCONNECTED;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100331 break;
332 case SOCK_SEQPACKET:
Allan Stephens0c3141e2008-04-15 00:22:02 -0700333 ops = &packet_ops;
334 state = SS_UNCONNECTED;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100335 break;
336 case SOCK_DGRAM:
Per Lidenb97bf3f2006-01-02 19:04:38 +0100337 case SOCK_RDM:
Allan Stephens0c3141e2008-04-15 00:22:02 -0700338 ops = &msg_ops;
339 state = SS_READY;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100340 break;
Allan Stephens49978652006-06-25 23:47:18 -0700341 default:
Allan Stephens49978652006-06-25 23:47:18 -0700342 return -EPROTOTYPE;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100343 }
344
Allan Stephens0c3141e2008-04-15 00:22:02 -0700345 /* Allocate socket's protocol area */
Eric W. Biederman11aa9c22015-05-08 21:09:13 -0500346 sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700347 if (sk == NULL)
348 return -ENOMEM;
349
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400350 tsk = tipc_sk(sk);
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400351 tsk->max_pkt = MAX_PKT_DEFAULT;
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400352 INIT_LIST_HEAD(&tsk->publications);
353 msg = &tsk->phdr;
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500354 tn = net_generic(sock_net(sk), tipc_net_id);
355 tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG,
Jon Paul Maloy5b8fa7c2014-08-22 18:09:13 -0400356 NAMED_H_SIZE, 0);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100357
Allan Stephens0c3141e2008-04-15 00:22:02 -0700358 /* Finish initializing socket data structures */
Allan Stephens0c3141e2008-04-15 00:22:02 -0700359 sock->ops = ops;
360 sock->state = state;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100361 sock_init_data(sock, sk);
Ying Xue07f6c4b2015-01-07 13:41:58 +0800362 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);
Ying Xue3721e9c2015-01-13 17:07:48 +0800367 setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk);
Jon Paul Maloy4f4482d2014-05-14 05:39:09 -0400368 sk->sk_backlog_rcv = tipc_backlog_rcv;
Ying Xuecc79dd12013-06-17 10:54:37 -0400369 sk->sk_rcvbuf = sysctl_tipc_rmem[1];
Ying Xuef288bef2012-08-21 11:16:57 +0800370 sk->sk_data_ready = tipc_data_ready;
371 sk->sk_write_space = tipc_write_space;
Jon Paul Maloy4f4482d2014-05-14 05:39:09 -0400372 tsk->conn_timeout = CONN_TIMEOUT_DEFAULT;
Jon Paul Maloy60120522014-06-25 20:41:42 -0500373 tsk->sent_unacked = 0;
Jon Paul Maloy4f4482d2014-05-14 05:39:09 -0400374 atomic_set(&tsk->dupl_rcvcnt, 0);
Allan Stephens7ef43eb2008-05-12 15:42:28 -0700375
Allan Stephens0c3141e2008-04-15 00:22:02 -0700376 if (sock->state == SS_READY) {
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400377 tsk_set_unreturnable(tsk, true);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700378 if (sock->type == SOCK_DGRAM)
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400379 tsk_set_unreliable(tsk, true);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700380 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100381 return 0;
382}
383
Ying Xue07f6c4b2015-01-07 13:41:58 +0800384static 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
Ying Xuec5fa7b32013-06-17 10:54:39 -0400391/**
Ying Xue247f0f32014-02-18 16:06:46 +0800392 * tipc_release - destroy a TIPC socket
Per Lidenb97bf3f2006-01-02 19:04:38 +0100393 * @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.)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900400 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100401 * 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 */
Ying Xue247f0f32014-02-18 16:06:46 +0800407static int tipc_release(struct socket *sock)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100408{
Per Lidenb97bf3f2006-01-02 19:04:38 +0100409 struct sock *sk = sock->sk;
Sasha Levin357c4772015-01-13 12:46:41 -0500410 struct net *net;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400411 struct tipc_sock *tsk;
Ying Xuea6ca1092014-11-26 11:41:55 +0800412 struct sk_buff *skb;
Ying Xue1ea23a22015-05-28 13:19:22 +0800413 u32 dnode;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100414
Allan Stephens0c3141e2008-04-15 00:22:02 -0700415 /*
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 */
Allan Stephens0c3141e2008-04-15 00:22:02 -0700419 if (sk == NULL)
420 return 0;
421
Sasha Levin357c4772015-01-13 12:46:41 -0500422 net = sock_net(sk);
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400423 tsk = tipc_sk(sk);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700424 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 */
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400430 dnode = tsk_peer_node(tsk);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100431 while (sock->state != SS_DISCONNECTING) {
Ying Xuea6ca1092014-11-26 11:41:55 +0800432 skb = __skb_dequeue(&sk->sk_receive_queue);
433 if (skb == NULL)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100434 break;
Ying Xuea6ca1092014-11-26 11:41:55 +0800435 if (TIPC_SKB_CB(skb)->handle != NULL)
436 kfree_skb(skb);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700437 else {
438 if ((sock->state == SS_CONNECTING) ||
439 (sock->state == SS_CONNECTED)) {
440 sock->state = SS_DISCONNECTING;
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400441 tsk->connected = 0;
Ying Xuef2f98002015-01-09 15:27:05 +0800442 tipc_node_remove_conn(net, dnode, tsk->portid);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700443 }
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500444 if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode,
Ying Xue34747532015-01-09 15:27:10 +0800445 TIPC_ERR_NO_PORT))
Ying Xuef2f98002015-01-09 15:27:05 +0800446 tipc_link_xmit_skb(net, skb, dnode, 0);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700447 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100448 }
449
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400450 tipc_sk_withdraw(tsk, 0, NULL);
Ying Xue1ea23a22015-05-28 13:19:22 +0800451 sk_stop_timer(sk, &sk->sk_timer);
Ying Xue07f6c4b2015-01-07 13:41:58 +0800452 tipc_sk_remove(tsk);
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400453 if (tsk->connected) {
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500454 skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
Ying Xue34747532015-01-09 15:27:10 +0800455 TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode,
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500456 tsk_own_node(tsk), tsk_peer_port(tsk),
Ying Xue07f6c4b2015-01-07 13:41:58 +0800457 tsk->portid, TIPC_ERR_NO_PORT);
Ying Xuea6ca1092014-11-26 11:41:55 +0800458 if (skb)
Ying Xuef2f98002015-01-09 15:27:05 +0800459 tipc_link_xmit_skb(net, skb, dnode, tsk->portid);
460 tipc_node_remove_conn(net, dnode, tsk->portid);
Jon Paul Maloy5b8fa7c2014-08-22 18:09:13 -0400461 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100462
Allan Stephens0c3141e2008-04-15 00:22:02 -0700463 /* Discard any remaining (connection-based) messages in receive queue */
Ying Xue57467e52013-01-20 23:30:08 +0100464 __skb_queue_purge(&sk->sk_receive_queue);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100465
Allan Stephens0c3141e2008-04-15 00:22:02 -0700466 /* Reject any messages that accumulated in backlog queue */
Allan Stephens0c3141e2008-04-15 00:22:02 -0700467 sock->state = SS_DISCONNECTING;
468 release_sock(sk);
Ying Xue07f6c4b2015-01-07 13:41:58 +0800469
470 call_rcu(&tsk->rcu, tipc_sk_callback);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700471 sock->sk = NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100472
Geert Uytterhoeven065d7e32014-04-06 15:56:14 +0200473 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100474}
475
476/**
Ying Xue247f0f32014-02-18 16:06:46 +0800477 * tipc_bind - associate or disassocate TIPC name(s) with a socket
Per Lidenb97bf3f2006-01-02 19:04:38 +0100478 * @sock: socket structure
479 * @uaddr: socket address describing name(s) and desired operation
480 * @uaddr_len: size of socket address data structure
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900481 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100482 * 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.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900485 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100486 * Returns 0 on success, errno otherwise
Allan Stephens0c3141e2008-04-15 00:22:02 -0700487 *
488 * NOTE: This routine doesn't need to take the socket lock since it doesn't
489 * access any non-constant socket information.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100490 */
Ying Xue247f0f32014-02-18 16:06:46 +0800491static int tipc_bind(struct socket *sock, struct sockaddr *uaddr,
492 int uaddr_len)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100493{
Ying Xue84602762013-12-27 10:18:28 +0800494 struct sock *sk = sock->sk;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100495 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400496 struct tipc_sock *tsk = tipc_sk(sk);
Ying Xue84602762013-12-27 10:18:28 +0800497 int res = -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100498
Ying Xue84602762013-12-27 10:18:28 +0800499 lock_sock(sk);
500 if (unlikely(!uaddr_len)) {
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400501 res = tipc_sk_withdraw(tsk, 0, NULL);
Ying Xue84602762013-12-27 10:18:28 +0800502 goto exit;
503 }
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900504
Ying Xue84602762013-12-27 10:18:28 +0800505 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 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100513
Per Lidenb97bf3f2006-01-02 19:04:38 +0100514 if (addr->addrtype == TIPC_ADDR_NAME)
515 addr->addr.nameseq.upper = addr->addr.nameseq.lower;
Ying Xue84602762013-12-27 10:18:28 +0800516 else if (addr->addrtype != TIPC_ADDR_NAMESEQ) {
517 res = -EAFNOSUPPORT;
518 goto exit;
519 }
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900520
Ying Xue13a2e892013-06-17 10:54:40 -0400521 if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) &&
Ying Xue7d0ab172013-06-17 10:54:41 -0400522 (addr->addr.nameseq.type != TIPC_TOP_SRV) &&
Ying Xue84602762013-12-27 10:18:28 +0800523 (addr->addr.nameseq.type != TIPC_CFG_SRV)) {
524 res = -EACCES;
525 goto exit;
526 }
Allan Stephensc422f1b2011-11-02 15:49:40 -0400527
Ying Xue84602762013-12-27 10:18:28 +0800528 res = (addr->scope > 0) ?
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400529 tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) :
530 tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq);
Ying Xue84602762013-12-27 10:18:28 +0800531exit:
532 release_sock(sk);
533 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100534}
535
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900536/**
Ying Xue247f0f32014-02-18 16:06:46 +0800537 * tipc_getname - get port ID of socket or peer socket
Per Lidenb97bf3f2006-01-02 19:04:38 +0100538 * @sock: socket structure
539 * @uaddr: area for returned socket address
540 * @uaddr_len: area for returned length of socket address
Allan Stephens2da59912008-07-14 22:43:32 -0700541 * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900542 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100543 * Returns 0 on success, errno otherwise
Allan Stephens0c3141e2008-04-15 00:22:02 -0700544 *
Allan Stephens2da59912008-07-14 22:43:32 -0700545 * 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
Allan Stephens0e659672010-12-31 18:59:32 +0000547 * a completely predictable manner).
Per Lidenb97bf3f2006-01-02 19:04:38 +0100548 */
Ying Xue247f0f32014-02-18 16:06:46 +0800549static int tipc_getname(struct socket *sock, struct sockaddr *uaddr,
550 int *uaddr_len, int peer)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100551{
Per Lidenb97bf3f2006-01-02 19:04:38 +0100552 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400553 struct tipc_sock *tsk = tipc_sk(sock->sk);
Ying Xue34747532015-01-09 15:27:10 +0800554 struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100555
Kulikov Vasiliy88f8a5e2010-10-31 07:10:32 +0000556 memset(addr, 0, sizeof(*addr));
Allan Stephens0c3141e2008-04-15 00:22:02 -0700557 if (peer) {
Allan Stephens2da59912008-07-14 22:43:32 -0700558 if ((sock->state != SS_CONNECTED) &&
559 ((peer != 2) || (sock->state != SS_DISCONNECTING)))
560 return -ENOTCONN;
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400561 addr->addr.id.ref = tsk_peer_port(tsk);
562 addr->addr.id.node = tsk_peer_node(tsk);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700563 } else {
Ying Xue07f6c4b2015-01-07 13:41:58 +0800564 addr->addr.id.ref = tsk->portid;
Ying Xue34747532015-01-09 15:27:10 +0800565 addr->addr.id.node = tn->own_addr;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700566 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100567
568 *uaddr_len = sizeof(*addr);
569 addr->addrtype = TIPC_ADDR_ID;
570 addr->family = AF_TIPC;
571 addr->scope = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100572 addr->addr.name.domain = 0;
573
Allan Stephens0c3141e2008-04-15 00:22:02 -0700574 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100575}
576
577/**
Ying Xue247f0f32014-02-18 16:06:46 +0800578 * tipc_poll - read and possibly block on pollmask
Per Lidenb97bf3f2006-01-02 19:04:38 +0100579 * @file: file structure associated with the socket
580 * @sock: socket for which to calculate the poll bits
581 * @wait: ???
582 *
Allan Stephens9b674e82008-03-26 16:48:21 -0700583 * 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:
Allan Stephens9b674e82008-03-26 16:48:21 -0700592 *
Allan Stephensf662c072010-08-17 11:00:06 +0000593 * socket state flags set
594 * ------------ ---------
595 * unconnected no read flags
Erik Hugnec4fc2982012-10-16 16:47:06 +0200596 * POLLOUT if port is not congested
Allan Stephensf662c072010-08-17 11:00:06 +0000597 *
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.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100616 */
Ying Xue247f0f32014-02-18 16:06:46 +0800617static unsigned int tipc_poll(struct file *file, struct socket *sock,
618 poll_table *wait)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100619{
Allan Stephens9b674e82008-03-26 16:48:21 -0700620 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400621 struct tipc_sock *tsk = tipc_sk(sk);
Allan Stephensf662c072010-08-17 11:00:06 +0000622 u32 mask = 0;
Allan Stephens9b674e82008-03-26 16:48:21 -0700623
Ying Xuef288bef2012-08-21 11:16:57 +0800624 sock_poll_wait(file, sk_sleep(sk), wait);
Allan Stephens9b674e82008-03-26 16:48:21 -0700625
Allan Stephensf662c072010-08-17 11:00:06 +0000626 switch ((int)sock->state) {
Erik Hugnec4fc2982012-10-16 16:47:06 +0200627 case SS_UNCONNECTED:
Jon Paul Maloy60120522014-06-25 20:41:42 -0500628 if (!tsk->link_cong)
Erik Hugnec4fc2982012-10-16 16:47:06 +0200629 mask |= POLLOUT;
630 break;
Allan Stephensf662c072010-08-17 11:00:06 +0000631 case SS_READY:
632 case SS_CONNECTED:
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400633 if (!tsk->link_cong && !tsk_conn_cong(tsk))
Allan Stephensf662c072010-08-17 11:00:06 +0000634 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 }
Allan Stephens9b674e82008-03-26 16:48:21 -0700645
646 return mask;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100647}
648
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400649/**
650 * tipc_sendmcast - send multicast message
651 * @sock: socket structure
652 * @seq: destination address
Al Viro562640f2014-11-15 01:13:43 -0500653 * @msg: message to send
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400654 * @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 */
660static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
Al Viro562640f2014-11-15 01:13:43 -0500661 struct msghdr *msg, size_t dsz, long timeo)
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400662{
663 struct sock *sk = sock->sk;
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500664 struct tipc_sock *tsk = tipc_sk(sk);
Ying Xuef2f98002015-01-09 15:27:05 +0800665 struct net *net = sock_net(sk);
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500666 struct tipc_msg *mhdr = &tsk->phdr;
Jon Paul Maloy94153e32015-02-05 08:36:40 -0500667 struct sk_buff_head *pktchain = &sk->sk_write_queue;
Al Virof25dcc72014-11-28 15:52:29 -0500668 struct iov_iter save = msg->msg_iter;
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400669 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
681new_mtu:
682 mtu = tipc_bclink_get_mtu();
Jon Paul Maloy94153e32015-02-05 08:36:40 -0500683 rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, pktchain);
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400684 if (unlikely(rc < 0))
685 return rc;
686
687 do {
Jon Paul Maloy94153e32015-02-05 08:36:40 -0500688 rc = tipc_bclink_xmit(net, pktchain);
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400689 if (likely(rc >= 0)) {
690 rc = dsz;
691 break;
692 }
Al Virof25dcc72014-11-28 15:52:29 -0500693 if (rc == -EMSGSIZE) {
694 msg->msg_iter = save;
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400695 goto new_mtu;
Al Virof25dcc72014-11-28 15:52:29 -0500696 }
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400697 if (rc != -ELINKCONG)
698 break;
Jon Paul Maloy50100a52014-08-22 18:09:07 -0400699 tipc_sk(sk)->link_cong = 1;
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400700 rc = tipc_wait_for_sndmsg(sock, &timeo);
701 if (rc)
Jon Paul Maloy94153e32015-02-05 08:36:40 -0500702 __skb_queue_purge(pktchain);
Jon Paul Maloy0abd8ff2014-07-16 20:41:01 -0400703 } while (!rc);
704 return rc;
705}
706
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500707/**
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
Jon Paul Maloy078bec82014-07-16 20:41:00 -0400713 */
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500714void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
715 struct sk_buff_head *inputq)
Jon Paul Maloy078bec82014-07-16 20:41:00 -0400716{
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500717 struct tipc_msg *msg;
Jon Paul Maloy3c724ac2015-02-05 08:36:43 -0500718 struct tipc_plist dports;
Jon Paul Maloy3c724ac2015-02-05 08:36:43 -0500719 u32 portid;
Jon Paul Maloy078bec82014-07-16 20:41:00 -0400720 u32 scope = TIPC_CLUSTER_SCOPE;
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500721 struct sk_buff_head tmpq;
722 uint hsz;
723 struct sk_buff *skb, *_skb;
Jon Paul Maloy3c724ac2015-02-05 08:36:43 -0500724
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500725 __skb_queue_head_init(&tmpq);
Jon Paul Maloy3c724ac2015-02-05 08:36:43 -0500726 tipc_plist_init(&dports);
Jon Paul Maloy078bec82014-07-16 20:41:00 -0400727
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500728 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);
Jon Paul Maloy078bec82014-07-16 20:41:00 -0400732
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500733 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");
Jon Paul Maloy078bec82014-07-16 20:41:00 -0400749 }
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500750 /* 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);
Jon Paul Maloy078bec82014-07-16 20:41:00 -0400759 }
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500760 tipc_sk_rcv(net, inputq);
Jon Paul Maloy078bec82014-07-16 20:41:00 -0400761}
762
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900763/**
Jon Paul Maloyac0074e2014-06-25 20:41:41 -0500764 * tipc_sk_proto_rcv - receive a connection mng protocol message
765 * @tsk: receiving socket
Jon Paul Maloy1186adf2015-02-05 08:36:37 -0500766 * @skb: pointer to message buffer. Set to NULL if buffer is consumed.
Jon Paul Maloyac0074e2014-06-25 20:41:41 -0500767 */
Jon Paul Maloy1186adf2015-02-05 08:36:37 -0500768static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff **skb)
Jon Paul Maloyac0074e2014-06-25 20:41:41 -0500769{
Jon Paul Maloy1186adf2015-02-05 08:36:37 -0500770 struct tipc_msg *msg = buf_msg(*skb);
Jon Paul Maloy60120522014-06-25 20:41:42 -0500771 int conn_cong;
Jon Paul Maloy1186adf2015-02-05 08:36:37 -0500772 u32 dnode;
773 u32 own_node = tsk_own_node(tsk);
Jon Paul Maloyac0074e2014-06-25 20:41:41 -0500774 /* Ignore if connection cannot be validated: */
Jon Paul Maloy2e84c602014-08-22 18:09:18 -0400775 if (!tsk_peer_msg(tsk, msg))
Jon Paul Maloyac0074e2014-06-25 20:41:41 -0500776 goto exit;
777
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400778 tsk->probing_state = TIPC_CONN_OK;
Jon Paul Maloyac0074e2014-06-25 20:41:41 -0500779
780 if (msg_type(msg) == CONN_ACK) {
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400781 conn_cong = tsk_conn_cong(tsk);
Jon Paul Maloy60120522014-06-25 20:41:42 -0500782 tsk->sent_unacked -= msg_msgcnt(msg);
783 if (conn_cong)
Jon Paul Maloy50100a52014-08-22 18:09:07 -0400784 tsk->sk.sk_write_space(&tsk->sk);
Jon Paul Maloyac0074e2014-06-25 20:41:41 -0500785 } else if (msg_type(msg) == CONN_PROBE) {
Jon Paul Maloy1186adf2015-02-05 08:36:37 -0500786 if (tipc_msg_reverse(own_node, *skb, &dnode, TIPC_OK)) {
787 msg_set_type(msg, CONN_PROBE_REPLY);
788 return;
789 }
Jon Paul Maloyac0074e2014-06-25 20:41:41 -0500790 }
791 /* Do nothing if msg_type() == CONN_PROBE_REPLY */
792exit:
Jon Paul Maloy1186adf2015-02-05 08:36:37 -0500793 kfree_skb(*skb);
794 *skb = NULL;
Jon Paul Maloyac0074e2014-06-25 20:41:41 -0500795}
796
Ying Xue3f405042014-01-17 09:50:05 +0800797static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p)
798{
799 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400800 struct tipc_sock *tsk = tipc_sk(sk);
Ying Xue3f405042014-01-17 09:50:05 +0800801 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);
Jon Paul Maloy60120522014-06-25 20:41:42 -0500816 done = sk_wait_event(sk, timeo_p, !tsk->link_cong);
Ying Xue3f405042014-01-17 09:50:05 +0800817 finish_wait(sk_sleep(sk), &wait);
818 } while (!done);
819 return 0;
820}
821
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500822/**
Ying Xue247f0f32014-02-18 16:06:46 +0800823 * tipc_sendmsg - send message in connectionless manner
Per Lidenb97bf3f2006-01-02 19:04:38 +0100824 * @sock: socket structure
825 * @m: message to send
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500826 * @dsz: amount of user data to be sent
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900827 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100828 * Message must have an destination specified explicitly.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900829 * Used for SOCK_RDM and SOCK_DGRAM messages,
Per Lidenb97bf3f2006-01-02 19:04:38 +0100830 * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
831 * (Note: 'SYN+' is prohibited on SOCK_STREAM.)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900832 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100833 * Returns the number of bytes sent on success, or errno otherwise
834 */
Ying Xue1b784142015-03-02 15:37:48 +0800835static int tipc_sendmsg(struct socket *sock,
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500836 struct msghdr *m, size_t dsz)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100837{
Ying Xue39a02952015-03-02 15:37:47 +0800838 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
848static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz)
849{
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500850 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
Allan Stephens0c3141e2008-04-15 00:22:02 -0700851 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400852 struct tipc_sock *tsk = tipc_sk(sk);
Ying Xuef2f98002015-01-09 15:27:05 +0800853 struct net *net = sock_net(sk);
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400854 struct tipc_msg *mhdr = &tsk->phdr;
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500855 u32 dnode, dport;
Jon Paul Maloy94153e32015-02-05 08:36:40 -0500856 struct sk_buff_head *pktchain = &sk->sk_write_queue;
Ying Xuea6ca1092014-11-26 11:41:55 +0800857 struct sk_buff *skb;
Erik Hugnef2f80362015-03-19 09:02:19 +0100858 struct tipc_name_seq *seq;
Al Virof25dcc72014-11-28 15:52:29 -0500859 struct iov_iter save;
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500860 u32 mtu;
Ying Xue3f405042014-01-17 09:50:05 +0800861 long timeo;
Erik Hugne88b17b62014-12-03 14:44:44 +0100862 int rc;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100863
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500864 if (dsz > TIPC_MAX_USER_MSG_SIZE)
Allan Stephensc29c3f72010-04-20 17:58:24 -0400865 return -EMSGSIZE;
Erik Hugnef2f80362015-03-19 09:02:19 +0100866 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 }
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500875 if (unlikely(sock->state != SS_READY)) {
Ying Xue39a02952015-03-02 15:37:47 +0800876 if (sock->state == SS_LISTENING)
877 return -EPIPE;
878 if (sock->state != SS_UNCONNECTED)
879 return -EISCONN;
880 if (tsk->published)
881 return -EOPNOTSUPP;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700882 if (dest->addrtype == TIPC_ADDR_NAME) {
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400883 tsk->conn_type = dest->addr.name.name.type;
884 tsk->conn_instance = dest->addr.name.name.instance;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700885 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100886 }
Erik Hugnef2f80362015-03-19 09:02:19 +0100887 seq = &dest->addr.nameseq;
Ying Xue3f405042014-01-17 09:50:05 +0800888 timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500889
890 if (dest->addrtype == TIPC_ADDR_MCAST) {
Ying Xue39a02952015-03-02 15:37:47 +0800891 return tipc_sendmcast(sock, seq, m, dsz, timeo);
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500892 } 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));
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800903 dport = tipc_nametbl_translate(net, type, inst, &dnode);
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500904 msg_set_destnode(mhdr, dnode);
905 msg_set_destport(mhdr, dport);
Ying Xue39a02952015-03-02 15:37:47 +0800906 if (unlikely(!dport && !dnode))
907 return -EHOSTUNREACH;
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500908 } 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
Al Virof25dcc72014-11-28 15:52:29 -0500917 save = m->msg_iter;
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500918new_mtu:
Ying Xuef2f98002015-01-09 15:27:05 +0800919 mtu = tipc_node_get_mtu(net, dnode, tsk->portid);
Jon Paul Maloy94153e32015-02-05 08:36:40 -0500920 rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, pktchain);
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500921 if (rc < 0)
Ying Xue39a02952015-03-02 15:37:47 +0800922 return rc;
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500923
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900924 do {
Jon Paul Maloy94153e32015-02-05 08:36:40 -0500925 skb = skb_peek(pktchain);
Ying Xuea6ca1092014-11-26 11:41:55 +0800926 TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong;
Jon Paul Maloy94153e32015-02-05 08:36:40 -0500927 rc = tipc_link_xmit(net, pktchain, dnode, tsk->portid);
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500928 if (likely(rc >= 0)) {
929 if (sock->state != SS_READY)
Allan Stephens0c3141e2008-04-15 00:22:02 -0700930 sock->state = SS_CONNECTING;
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500931 rc = dsz;
Allan Stephens0c3141e2008-04-15 00:22:02 -0700932 break;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900933 }
Al Virof25dcc72014-11-28 15:52:29 -0500934 if (rc == -EMSGSIZE) {
935 m->msg_iter = save;
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500936 goto new_mtu;
Al Virof25dcc72014-11-28 15:52:29 -0500937 }
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500938 if (rc != -ELINKCONG)
Allan Stephens0c3141e2008-04-15 00:22:02 -0700939 break;
Jon Paul Maloy50100a52014-08-22 18:09:07 -0400940 tsk->link_cong = 1;
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500941 rc = tipc_wait_for_sndmsg(sock, &timeo);
Erik Hugne70452dc2014-07-06 20:38:50 -0400942 if (rc)
Jon Paul Maloy94153e32015-02-05 08:36:40 -0500943 __skb_queue_purge(pktchain);
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500944 } while (!rc);
Jon Paul Maloye2dafe82014-06-25 20:41:37 -0500945
946 return rc;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100947}
948
Ying Xue391a6dd2014-01-17 09:50:06 +0800949static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p)
950{
951 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -0400952 struct tipc_sock *tsk = tipc_sk(sk);
Ying Xue391a6dd2014-01-17 09:50:06 +0800953 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,
Jon Paul Maloy60120522014-06-25 20:41:42 -0500971 (!tsk->link_cong &&
Jon Paul Maloy301bae52014-08-22 18:09:20 -0400972 !tsk_conn_cong(tsk)) ||
973 !tsk->connected);
Ying Xue391a6dd2014-01-17 09:50:06 +0800974 finish_wait(sk_sleep(sk), &wait);
975 } while (!done);
976 return 0;
977}
978
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900979/**
Ying Xue247f0f32014-02-18 16:06:46 +0800980 * tipc_send_stream - send stream-oriented data
Per Lidenb97bf3f2006-01-02 19:04:38 +0100981 * @sock: socket structure
982 * @m: data to send
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -0500983 * @dsz: total length of data to be transmitted
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900984 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100985 * Used for SOCK_STREAM data.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900986 *
987 * Returns the number of bytes sent on success (or partial success),
Allan Stephens1303e8f2006-06-25 23:46:50 -0700988 * or errno if no data sent
Per Lidenb97bf3f2006-01-02 19:04:38 +0100989 */
Ying Xue1b784142015-03-02 15:37:48 +0800990static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100991{
Allan Stephens0c3141e2008-04-15 00:22:02 -0700992 struct sock *sk = sock->sk;
Ying Xue39a02952015-03-02 15:37:47 +0800993 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
1002static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz)
1003{
1004 struct sock *sk = sock->sk;
Ying Xuef2f98002015-01-09 15:27:05 +08001005 struct net *net = sock_net(sk);
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001006 struct tipc_sock *tsk = tipc_sk(sk);
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001007 struct tipc_msg *mhdr = &tsk->phdr;
Jon Paul Maloy94153e32015-02-05 08:36:40 -05001008 struct sk_buff_head *pktchain = &sk->sk_write_queue;
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001009 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
Ying Xue07f6c4b2015-01-07 13:41:58 +08001010 u32 portid = tsk->portid;
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001011 int rc = -EINVAL;
1012 long timeo;
1013 u32 dnode;
1014 uint mtu, send, sent = 0;
Al Virof25dcc72014-11-28 15:52:29 -05001015 struct iov_iter save;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001016
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001017 /* Handle implied connection establishment */
1018 if (unlikely(dest)) {
Ying Xue39a02952015-03-02 15:37:47 +08001019 rc = __tipc_sendmsg(sock, m, dsz);
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001020 if (dsz && (dsz == rc))
Jon Paul Maloy60120522014-06-25 20:41:42 -05001021 tsk->sent_unacked = 1;
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001022 return rc;
1023 }
1024 if (dsz > (uint)INT_MAX)
1025 return -EMSGSIZE;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001026
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001027 if (unlikely(sock->state != SS_CONNECTED)) {
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001028 if (sock->state == SS_DISCONNECTING)
Ying Xue39a02952015-03-02 15:37:47 +08001029 return -EPIPE;
wangweidongb0555972013-12-27 10:09:39 +08001030 else
Ying Xue39a02952015-03-02 15:37:47 +08001031 return -ENOTCONN;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001032 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001033
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001034 timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001035 dnode = tsk_peer_node(tsk);
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001036
1037next:
Al Virof25dcc72014-11-28 15:52:29 -05001038 save = m->msg_iter;
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001039 mtu = tsk->max_pkt;
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001040 send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE);
Jon Paul Maloy94153e32015-02-05 08:36:40 -05001041 rc = tipc_msg_build(mhdr, m, sent, send, mtu, pktchain);
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001042 if (unlikely(rc < 0))
Ying Xue39a02952015-03-02 15:37:47 +08001043 return rc;
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001044 do {
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001045 if (likely(!tsk_conn_cong(tsk))) {
Jon Paul Maloy94153e32015-02-05 08:36:40 -05001046 rc = tipc_link_xmit(net, pktchain, dnode, portid);
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001047 if (likely(!rc)) {
Jon Paul Maloy60120522014-06-25 20:41:42 -05001048 tsk->sent_unacked++;
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001049 sent += send;
1050 if (sent == dsz)
1051 break;
1052 goto next;
Allan Stephens1303e8f2006-06-25 23:46:50 -07001053 }
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001054 if (rc == -EMSGSIZE) {
Ying Xuef2f98002015-01-09 15:27:05 +08001055 tsk->max_pkt = tipc_node_get_mtu(net, dnode,
1056 portid);
Al Virof25dcc72014-11-28 15:52:29 -05001057 m->msg_iter = save;
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001058 goto next;
1059 }
1060 if (rc != -ELINKCONG)
1061 break;
Jon Paul Maloy50100a52014-08-22 18:09:07 -04001062 tsk->link_cong = 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001063 }
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001064 rc = tipc_wait_for_sndpkt(sock, &timeo);
Erik Hugne70452dc2014-07-06 20:38:50 -04001065 if (rc)
Jon Paul Maloy94153e32015-02-05 08:36:40 -05001066 __skb_queue_purge(pktchain);
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001067 } while (!rc);
Ying Xue39a02952015-03-02 15:37:47 +08001068
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001069 return sent ? sent : rc;
1070}
1071
1072/**
1073 * tipc_send_packet - send a connection-oriented message
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001074 * @sock: socket structure
1075 * @m: message to send
1076 * @dsz: length of data to be transmitted
1077 *
1078 * Used for SOCK_SEQPACKET messages.
1079 *
1080 * Returns the number of bytes sent on success, or errno otherwise
1081 */
Ying Xue1b784142015-03-02 15:37:48 +08001082static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz)
Jon Paul Maloy4ccfe5e2014-06-25 20:41:38 -05001083{
1084 if (dsz > TIPC_MAX_USER_MSG_SIZE)
1085 return -EMSGSIZE;
1086
Ying Xue1b784142015-03-02 15:37:48 +08001087 return tipc_send_stream(sock, m, dsz);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001088}
1089
Jon Paul Maloydadebc02014-08-22 18:09:11 -04001090/* tipc_sk_finish_conn - complete the setup of a connection
Per Lidenb97bf3f2006-01-02 19:04:38 +01001091 */
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001092static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port,
Jon Paul Maloydadebc02014-08-22 18:09:11 -04001093 u32 peer_node)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001094{
Ying Xue3721e9c2015-01-13 17:07:48 +08001095 struct sock *sk = &tsk->sk;
1096 struct net *net = sock_net(sk);
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001097 struct tipc_msg *msg = &tsk->phdr;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001098
Jon Paul Maloydadebc02014-08-22 18:09:11 -04001099 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);
Jon Paul Maloyf9fef182014-03-12 11:31:08 -04001104
Ying Xue2f55c432015-01-09 15:27:00 +08001105 tsk->probing_intv = CONN_PROBING_INTERVAL;
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001106 tsk->probing_state = TIPC_CONN_OK;
1107 tsk->connected = 1;
Ying Xue3721e9c2015-01-13 17:07:48 +08001108 sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv);
Ying Xuef2f98002015-01-09 15:27:05 +08001109 tipc_node_add_conn(net, peer_node, tsk->portid, peer_port);
1110 tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001111}
1112
1113/**
1114 * set_orig_addr - capture sender's address for received message
1115 * @m: descriptor for message info
1116 * @msg: received message header
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001117 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001118 * Note: Address is not captured if not requested by receiver.
1119 */
Sam Ravnborg05790c62006-03-20 22:37:04 -08001120static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001121{
Steffen Hurrle342dfc32014-01-17 22:53:15 +01001122 DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001123
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001124 if (addr) {
Per Lidenb97bf3f2006-01-02 19:04:38 +01001125 addr->family = AF_TIPC;
1126 addr->addrtype = TIPC_ADDR_ID;
Mathias Krause60085c32013-04-07 01:52:00 +00001127 memset(&addr->addr, 0, sizeof(addr->addr));
Per Lidenb97bf3f2006-01-02 19:04:38 +01001128 addr->addr.id.ref = msg_origport(msg);
1129 addr->addr.id.node = msg_orignode(msg);
Allan Stephens0e659672010-12-31 18:59:32 +00001130 addr->addr.name.domain = 0; /* could leave uninitialized */
1131 addr->scope = 0; /* could leave uninitialized */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001132 m->msg_namelen = sizeof(struct sockaddr_tipc);
1133 }
1134}
1135
1136/**
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001137 * tipc_sk_anc_data_recv - optionally capture ancillary data for received message
Per Lidenb97bf3f2006-01-02 19:04:38 +01001138 * @m: descriptor for message info
1139 * @msg: received message header
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001140 * @tsk: TIPC port associated with message
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001141 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001142 * Note: Ancillary data is not captured if not requested by receiver.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001143 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001144 * Returns 0 if successful, otherwise errno
1145 */
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001146static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
1147 struct tipc_sock *tsk)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001148{
1149 u32 anc_data[3];
1150 u32 err;
1151 u32 dest_type;
Allan Stephens3546c752006-06-25 23:45:24 -07001152 int has_name;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001153 int res;
1154
1155 if (likely(m->msg_controllen == 0))
1156 return 0;
1157
1158 /* Optionally capture errored message object(s) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001159 err = msg ? msg_errcode(msg) : 0;
1160 if (unlikely(err)) {
1161 anc_data[0] = err;
1162 anc_data[1] = msg_data_sz(msg);
Allan Stephens2db99832010-12-31 18:59:33 +00001163 res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data);
1164 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001165 return res;
Allan Stephens2db99832010-12-31 18:59:33 +00001166 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 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001172 }
1173
1174 /* Optionally capture message destination object */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001175 dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG;
1176 switch (dest_type) {
1177 case TIPC_NAMED_MSG:
Allan Stephens3546c752006-06-25 23:45:24 -07001178 has_name = 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001179 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:
Allan Stephens3546c752006-06-25 23:45:24 -07001184 has_name = 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001185 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:
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001190 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;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001194 break;
1195 default:
Allan Stephens3546c752006-06-25 23:45:24 -07001196 has_name = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001197 }
Allan Stephens2db99832010-12-31 18:59:33 +00001198 if (has_name) {
1199 res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data);
1200 if (res)
1201 return res;
1202 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001203
1204 return 0;
1205}
1206
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001207static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack)
Jon Paul Maloy739f5e42014-08-22 18:09:12 -04001208{
Ying Xuef2f98002015-01-09 15:27:05 +08001209 struct net *net = sock_net(&tsk->sk);
Ying Xuea6ca1092014-11-26 11:41:55 +08001210 struct sk_buff *skb = NULL;
Jon Paul Maloy739f5e42014-08-22 18:09:12 -04001211 struct tipc_msg *msg;
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001212 u32 peer_port = tsk_peer_port(tsk);
1213 u32 dnode = tsk_peer_node(tsk);
Jon Paul Maloy739f5e42014-08-22 18:09:12 -04001214
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001215 if (!tsk->connected)
Jon Paul Maloy739f5e42014-08-22 18:09:12 -04001216 return;
Jon Paul Maloyc5898632015-02-05 08:36:36 -05001217 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);
Ying Xuea6ca1092014-11-26 11:41:55 +08001220 if (!skb)
Jon Paul Maloy739f5e42014-08-22 18:09:12 -04001221 return;
Ying Xuea6ca1092014-11-26 11:41:55 +08001222 msg = buf_msg(skb);
Jon Paul Maloy739f5e42014-08-22 18:09:12 -04001223 msg_set_msgcnt(msg, ack);
Ying Xuef2f98002015-01-09 15:27:05 +08001224 tipc_link_xmit_skb(net, skb, dnode, msg_link_selector(msg));
Jon Paul Maloy739f5e42014-08-22 18:09:12 -04001225}
1226
Arnaldo Carvalho de Melo85d3fc92014-05-23 15:55:12 -04001227static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop)
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001228{
1229 struct sock *sk = sock->sk;
1230 DEFINE_WAIT(wait);
Arnaldo Carvalho de Melo85d3fc92014-05-23 15:55:12 -04001231 long timeo = *timeop;
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001232 int err;
1233
1234 for (;;) {
1235 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
Ying Xuefe8e4642014-03-06 14:40:18 +01001236 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001237 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;
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001248 err = -EAGAIN;
1249 if (!timeo)
1250 break;
Erik Hugne143fe222015-03-09 10:43:42 +01001251 err = sock_intr_errno(timeo);
1252 if (signal_pending(current))
1253 break;
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001254 }
1255 finish_wait(sk_sleep(sk), &wait);
Arnaldo Carvalho de Melo85d3fc92014-05-23 15:55:12 -04001256 *timeop = timeo;
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001257 return err;
1258}
1259
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001260/**
Ying Xue247f0f32014-02-18 16:06:46 +08001261 * tipc_recvmsg - receive packet-oriented message
Per Lidenb97bf3f2006-01-02 19:04:38 +01001262 * @m: descriptor for message info
1263 * @buf_len: total size of user buffer area
1264 * @flags: receive flags
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001265 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001266 * 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 */
Ying Xue1b784142015-03-02 15:37:48 +08001271static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len,
1272 int flags)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001273{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001274 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001275 struct tipc_sock *tsk = tipc_sk(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001276 struct sk_buff *buf;
1277 struct tipc_msg *msg;
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001278 long timeo;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001279 unsigned int sz;
1280 u32 err;
1281 int res;
1282
Allan Stephens0c3141e2008-04-15 00:22:02 -07001283 /* Catch invalid receive requests */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001284 if (unlikely(!buf_len))
1285 return -EINVAL;
1286
Allan Stephens0c3141e2008-04-15 00:22:02 -07001287 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001288
Allan Stephens0c3141e2008-04-15 00:22:02 -07001289 if (unlikely(sock->state == SS_UNCONNECTED)) {
Per Lidenb97bf3f2006-01-02 19:04:38 +01001290 res = -ENOTCONN;
1291 goto exit;
1292 }
1293
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001294 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001295restart:
Per Lidenb97bf3f2006-01-02 19:04:38 +01001296
Allan Stephens0c3141e2008-04-15 00:22:02 -07001297 /* Look for a message in receive queue; wait if necessary */
Arnaldo Carvalho de Melo85d3fc92014-05-23 15:55:12 -04001298 res = tipc_wait_for_rcvmsg(sock, &timeo);
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001299 if (res)
1300 goto exit;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001301
1302 /* Look at first message in receive queue */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001303 buf = skb_peek(&sk->sk_receive_queue);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001304 msg = buf_msg(buf);
1305 sz = msg_data_sz(msg);
1306 err = msg_errcode(msg);
1307
Per Lidenb97bf3f2006-01-02 19:04:38 +01001308 /* Discard an empty non-errored message & try again */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001309 if ((!sz) && (!err)) {
Jon Paul Maloy2e84c602014-08-22 18:09:18 -04001310 tsk_advance_rx_queue(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001311 goto restart;
1312 }
1313
1314 /* Capture sender's address (optional) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001315 set_orig_addr(m, msg);
1316
1317 /* Capture ancillary data (optional) */
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001318 res = tipc_sk_anc_data_recv(m, msg, tsk);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001319 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001320 goto exit;
1321
1322 /* Capture message data (if valid) & compute return value (always) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001323 if (!err) {
1324 if (unlikely(buf_len < sz)) {
1325 sz = buf_len;
1326 m->msg_flags |= MSG_TRUNC;
1327 }
David S. Miller51f3d022014-11-05 16:46:40 -05001328 res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz);
Allan Stephens0232fd02011-02-21 09:45:40 -05001329 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001330 goto exit;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001331 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) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001341 if (likely(!(flags & MSG_PEEK))) {
Allan Stephens99009802008-04-15 00:06:12 -07001342 if ((sock->state != SS_READY) &&
Jon Paul Maloy60120522014-06-25 20:41:42 -05001343 (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) {
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001344 tipc_sk_send_ack(tsk, tsk->rcv_unacked);
Jon Paul Maloy60120522014-06-25 20:41:42 -05001345 tsk->rcv_unacked = 0;
1346 }
Jon Paul Maloy2e84c602014-08-22 18:09:18 -04001347 tsk_advance_rx_queue(sk);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001348 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001349exit:
Allan Stephens0c3141e2008-04-15 00:22:02 -07001350 release_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001351 return res;
1352}
1353
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001354/**
Ying Xue247f0f32014-02-18 16:06:46 +08001355 * tipc_recv_stream - receive stream-oriented data
Per Lidenb97bf3f2006-01-02 19:04:38 +01001356 * @m: descriptor for message info
1357 * @buf_len: total size of user buffer area
1358 * @flags: receive flags
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001359 *
1360 * Used for SOCK_STREAM messages only. If not enough data is available
Per Lidenb97bf3f2006-01-02 19:04:38 +01001361 * will optionally wait for more; never truncates data.
1362 *
1363 * Returns size of returned message data, errno otherwise
1364 */
Ying Xue1b784142015-03-02 15:37:48 +08001365static int tipc_recv_stream(struct socket *sock, struct msghdr *m,
1366 size_t buf_len, int flags)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001367{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001368 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001369 struct tipc_sock *tsk = tipc_sk(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001370 struct sk_buff *buf;
1371 struct tipc_msg *msg;
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001372 long timeo;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001373 unsigned int sz;
Florian Westphal3720d402010-08-17 11:00:04 +00001374 int sz_to_copy, target, needed;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001375 int sz_copied = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001376 u32 err;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001377 int res = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001378
1379 /* Catch invalid receive attempts */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001380 if (unlikely(!buf_len))
1381 return -EINVAL;
1382
Allan Stephens0c3141e2008-04-15 00:22:02 -07001383 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001384
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001385 if (unlikely(sock->state == SS_UNCONNECTED)) {
Per Lidenb97bf3f2006-01-02 19:04:38 +01001386 res = -ENOTCONN;
1387 goto exit;
1388 }
1389
Florian Westphal3720d402010-08-17 11:00:04 +00001390 target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001391 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
Paul Gortmaker617d3c72012-04-30 15:29:02 -04001392
Allan Stephens0c3141e2008-04-15 00:22:02 -07001393restart:
Allan Stephens0c3141e2008-04-15 00:22:02 -07001394 /* Look for a message in receive queue; wait if necessary */
Arnaldo Carvalho de Melo85d3fc92014-05-23 15:55:12 -04001395 res = tipc_wait_for_rcvmsg(sock, &timeo);
Ying Xue9bbb4ecc2014-01-17 09:50:07 +08001396 if (res)
1397 goto exit;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001398
1399 /* Look at first message in receive queue */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001400 buf = skb_peek(&sk->sk_receive_queue);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001401 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 */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001406 if ((!sz) && (!err)) {
Jon Paul Maloy2e84c602014-08-22 18:09:18 -04001407 tsk_advance_rx_queue(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001408 goto restart;
1409 }
1410
1411 /* Optionally capture sender's address & ancillary data of first msg */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001412 if (sz_copied == 0) {
1413 set_orig_addr(m, msg);
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001414 res = tipc_sk_anc_data_recv(m, msg, tsk);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001415 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001416 goto exit;
1417 }
1418
1419 /* Capture message data (if valid) & compute return value (always) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001420 if (!err) {
Allan Stephens0232fd02011-02-21 09:45:40 -05001421 u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001422
Allan Stephens0232fd02011-02-21 09:45:40 -05001423 sz -= offset;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001424 needed = (buf_len - sz_copied);
1425 sz_to_copy = (sz <= needed) ? sz : needed;
Allan Stephens0232fd02011-02-21 09:45:40 -05001426
David S. Miller51f3d022014-11-05 16:46:40 -05001427 res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset,
1428 m, sz_to_copy);
Allan Stephens0232fd02011-02-21 09:45:40 -05001429 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001430 goto exit;
Allan Stephens0232fd02011-02-21 09:45:40 -05001431
Per Lidenb97bf3f2006-01-02 19:04:38 +01001432 sz_copied += sz_to_copy;
1433
1434 if (sz_to_copy < sz) {
1435 if (!(flags & MSG_PEEK))
Allan Stephens0232fd02011-02-21 09:45:40 -05001436 TIPC_SKB_CB(buf)->handle =
1437 (void *)(unsigned long)(offset + sz_to_copy);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001438 goto exit;
1439 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001440 } 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) */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001451 if (likely(!(flags & MSG_PEEK))) {
Jon Paul Maloy60120522014-06-25 20:41:42 -05001452 if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) {
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001453 tipc_sk_send_ack(tsk, tsk->rcv_unacked);
Jon Paul Maloy60120522014-06-25 20:41:42 -05001454 tsk->rcv_unacked = 0;
1455 }
Jon Paul Maloy2e84c602014-08-22 18:09:18 -04001456 tsk_advance_rx_queue(sk);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001457 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001458
1459 /* Loop around if more data is required */
Joe Perchesf64f9e72009-11-29 16:55:45 -08001460 if ((sz_copied < buf_len) && /* didn't get all requested data */
1461 (!skb_queue_empty(&sk->sk_receive_queue) ||
Florian Westphal3720d402010-08-17 11:00:04 +00001462 (sz_copied < target)) && /* and more is ready or required */
Joe Perchesf64f9e72009-11-29 16:55:45 -08001463 (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */
1464 (!err)) /* and haven't reached a FIN */
Per Lidenb97bf3f2006-01-02 19:04:38 +01001465 goto restart;
1466
1467exit:
Allan Stephens0c3141e2008-04-15 00:22:02 -07001468 release_sock(sk);
Allan Stephensa3b0a5a2006-06-25 23:48:22 -07001469 return sz_copied ? sz_copied : res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001470}
1471
1472/**
Ying Xuef288bef2012-08-21 11:16:57 +08001473 * tipc_write_space - wake up thread if port congestion is released
1474 * @sk: socket
1475 */
1476static 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 */
David S. Miller676d2362014-04-11 16:15:36 -04001493static void tipc_data_ready(struct sock *sk)
Ying Xuef288bef2012-08-21 11:16:57 +08001494{
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
1505/**
Ying Xue7e6c1312012-11-29 18:39:14 -05001506 * filter_connect - Handle all incoming messages for a connection-based socket
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001507 * @tsk: TIPC socket
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001508 * @skb: pointer to message buffer. Set to NULL if buffer is consumed
Ying Xue7e6c1312012-11-29 18:39:14 -05001509 *
stephen hemmingerb2ad5e52014-10-29 22:58:51 -07001510 * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise
Ying Xue7e6c1312012-11-29 18:39:14 -05001511 */
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001512static int filter_connect(struct tipc_sock *tsk, struct sk_buff **skb)
Ying Xue7e6c1312012-11-29 18:39:14 -05001513{
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001514 struct sock *sk = &tsk->sk;
Ying Xuef2f98002015-01-09 15:27:05 +08001515 struct net *net = sock_net(sk);
Jon Paul Maloy8826cde2014-03-12 11:31:09 -04001516 struct socket *sock = sk->sk_socket;
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001517 struct tipc_msg *msg = buf_msg(*skb);
Jon Paul Maloye4de5fa2014-06-25 20:41:31 -05001518 int retval = -TIPC_ERR_NO_PORT;
Ying Xue7e6c1312012-11-29 18:39:14 -05001519
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 */
Jon Paul Maloy2e84c602014-08-22 18:09:18 -04001526 if (tsk_peer_msg(tsk, msg)) {
Ying Xue7e6c1312012-11-29 18:39:14 -05001527 if (unlikely(msg_errcode(msg))) {
1528 sock->state = SS_DISCONNECTING;
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001529 tsk->connected = 0;
Jon Paul Maloydadebc02014-08-22 18:09:11 -04001530 /* let timer expire on it's own */
Ying Xuef2f98002015-01-09 15:27:05 +08001531 tipc_node_remove_conn(net, tsk_peer_node(tsk),
Ying Xue07f6c4b2015-01-07 13:41:58 +08001532 tsk->portid);
Ying Xue7e6c1312012-11-29 18:39:14 -05001533 }
1534 retval = TIPC_OK;
1535 }
1536 break;
1537 case SS_CONNECTING:
1538 /* Accept only ACK or NACK message */
Jon Paul Maloydadebc02014-08-22 18:09:11 -04001539
1540 if (unlikely(!msg_connected(msg)))
1541 break;
1542
Ying Xue584d24b2012-11-29 18:51:19 -05001543 if (unlikely(msg_errcode(msg))) {
1544 sock->state = SS_DISCONNECTING;
Erik Hugne2c8d8512013-08-28 09:29:58 +02001545 sk->sk_err = ECONNREFUSED;
Ying Xue7e6c1312012-11-29 18:39:14 -05001546 retval = TIPC_OK;
Ying Xue584d24b2012-11-29 18:51:19 -05001547 break;
1548 }
1549
Jon Paul Maloydadebc02014-08-22 18:09:11 -04001550 if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) {
Ying Xue584d24b2012-11-29 18:51:19 -05001551 sock->state = SS_DISCONNECTING;
Jon Paul Maloydadebc02014-08-22 18:09:11 -04001552 sk->sk_err = EINVAL;
Ying Xue584d24b2012-11-29 18:51:19 -05001553 retval = TIPC_OK;
1554 break;
1555 }
1556
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001557 tipc_sk_finish_conn(tsk, msg_origport(msg), msg_orignode(msg));
1558 msg_set_importance(&tsk->phdr, msg_importance(msg));
Jon Paul Maloydadebc02014-08-22 18:09:11 -04001559 sock->state = SS_CONNECTED;
1560
Ying Xue584d24b2012-11-29 18:51:19 -05001561 /* 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) {
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001567 kfree_skb(*skb);
1568 *skb = NULL;
Ying Xue584d24b2012-11-29 18:51:19 -05001569 if (waitqueue_active(sk_sleep(sk)))
1570 wake_up_interruptible(sk_sleep(sk));
1571 }
1572 retval = TIPC_OK;
Ying Xue7e6c1312012-11-29 18:39:14 -05001573 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
1588/**
Ying Xueaba79f32013-01-20 23:30:09 +01001589 * 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 *
Ying Xuecc79dd12013-06-17 10:54:37 -04001599 * TIPC_LOW_IMPORTANCE (4 MB)
1600 * TIPC_MEDIUM_IMPORTANCE (8 MB)
1601 * TIPC_HIGH_IMPORTANCE (16 MB)
1602 * TIPC_CRITICAL_IMPORTANCE (32 MB)
Ying Xueaba79f32013-01-20 23:30:09 +01001603 *
1604 * Returns overload limit according to corresponding message importance
1605 */
1606static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf)
1607{
1608 struct tipc_msg *msg = buf_msg(buf);
Ying Xueaba79f32013-01-20 23:30:09 +01001609
1610 if (msg_connected(msg))
wangweidong0cee6bb2013-12-12 09:36:39 +08001611 return sysctl_tipc_rmem[2];
1612
1613 return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE <<
1614 msg_importance(msg);
Ying Xueaba79f32013-01-20 23:30:09 +01001615}
1616
1617/**
Allan Stephens0c3141e2008-04-15 00:22:02 -07001618 * filter_rcv - validate incoming message
1619 * @sk: socket
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001620 * @skb: pointer to message. Set to NULL if buffer is consumed.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001621 *
Allan Stephens0c3141e2008-04-15 00:22:02 -07001622 * Enqueues message on receive queue if acceptable; optionally handles
1623 * disconnect indication for a connected socket.
1624 *
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001625 * Called with socket lock already taken
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001626 *
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001627 * Returns 0 (TIPC_OK) if message was ok, -TIPC error code if rejected
Per Lidenb97bf3f2006-01-02 19:04:38 +01001628 */
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001629static int filter_rcv(struct sock *sk, struct sk_buff **skb)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001630{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001631 struct socket *sock = sk->sk_socket;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04001632 struct tipc_sock *tsk = tipc_sk(sk);
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001633 struct tipc_msg *msg = buf_msg(*skb);
1634 unsigned int limit = rcvbuf_limit(sk, *skb);
Jon Paul Maloye4de5fa2014-06-25 20:41:31 -05001635 int rc = TIPC_OK;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001636
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001637 if (unlikely(msg_user(msg) == CONN_MANAGER)) {
1638 tipc_sk_proto_rcv(tsk, skb);
1639 return TIPC_OK;
1640 }
Jon Paul Maloyec8a2e52014-06-25 20:41:40 -05001641
Jon Paul Maloy50100a52014-08-22 18:09:07 -04001642 if (unlikely(msg_user(msg) == SOCK_WAKEUP)) {
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001643 kfree_skb(*skb);
Jon Paul Maloy50100a52014-08-22 18:09:07 -04001644 tsk->link_cong = 0;
1645 sk->sk_write_space(sk);
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001646 *skb = NULL;
Jon Paul Maloy50100a52014-08-22 18:09:07 -04001647 return TIPC_OK;
1648 }
1649
Per Lidenb97bf3f2006-01-02 19:04:38 +01001650 /* Reject message if it is wrong sort of message for socket */
Allan Stephensaad58542012-04-26 18:13:08 -04001651 if (msg_type(msg) > TIPC_DIRECT_MSG)
Jon Paul Maloye4de5fa2014-06-25 20:41:31 -05001652 return -TIPC_ERR_NO_PORT;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001653
Per Lidenb97bf3f2006-01-02 19:04:38 +01001654 if (sock->state == SS_READY) {
Allan Stephensb29f1422010-12-31 18:59:25 +00001655 if (msg_connected(msg))
Jon Paul Maloye4de5fa2014-06-25 20:41:31 -05001656 return -TIPC_ERR_NO_PORT;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001657 } else {
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001658 rc = filter_connect(tsk, skb);
1659 if (rc != TIPC_OK || !*skb)
Jon Paul Maloye4de5fa2014-06-25 20:41:31 -05001660 return rc;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001661 }
1662
1663 /* Reject message if there isn't room to queue it */
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001664 if (sk_rmem_alloc_get(sk) + (*skb)->truesize >= limit)
Jon Paul Maloye4de5fa2014-06-25 20:41:31 -05001665 return -TIPC_ERR_OVERLOAD;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001666
Ying Xueaba79f32013-01-20 23:30:09 +01001667 /* Enqueue message */
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001668 TIPC_SKB_CB(*skb)->handle = NULL;
1669 __skb_queue_tail(&sk->sk_receive_queue, *skb);
1670 skb_set_owner_r(*skb, sk);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001671
David S. Miller676d2362014-04-11 16:15:36 -04001672 sk->sk_data_ready(sk);
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001673 *skb = NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001674 return TIPC_OK;
1675}
1676
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001677/**
Jon Paul Maloy4f4482d2014-05-14 05:39:09 -04001678 * tipc_backlog_rcv - handle incoming message from backlog queue
Allan Stephens0c3141e2008-04-15 00:22:02 -07001679 * @sk: socket
Ying Xuea6ca1092014-11-26 11:41:55 +08001680 * @skb: message
Allan Stephens0c3141e2008-04-15 00:22:02 -07001681 *
Jon Paul Maloye3a77562015-02-05 08:36:39 -05001682 * Caller must hold socket lock
Allan Stephens0c3141e2008-04-15 00:22:02 -07001683 *
1684 * Returns 0
1685 */
Ying Xuea6ca1092014-11-26 11:41:55 +08001686static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb)
Allan Stephens0c3141e2008-04-15 00:22:02 -07001687{
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001688 int err;
1689 atomic_t *dcnt;
1690 u32 dnode;
Jon Paul Maloy4f4482d2014-05-14 05:39:09 -04001691 struct tipc_sock *tsk = tipc_sk(sk);
Ying Xue34747532015-01-09 15:27:10 +08001692 struct net *net = sock_net(sk);
Ying Xuea6ca1092014-11-26 11:41:55 +08001693 uint truesize = skb->truesize;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001694
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001695 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);
Jon Paul Maloyac0074e2014-06-25 20:41:41 -05001700 return 0;
1701 }
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001702 if (!err || tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, -err))
1703 tipc_link_xmit_skb(net, skb, dnode, tsk->portid);
Allan Stephens0c3141e2008-04-15 00:22:02 -07001704 return 0;
1705}
1706
1707/**
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001708 * 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
Jon Paul Maloyd570d862015-02-05 08:36:38 -05001714 *
1715 * Caller must hold socket lock
1716 *
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001717 * Returns TIPC_OK if all buffers enqueued, otherwise -TIPC_ERR_OVERLOAD
1718 * or -TIPC_ERR_NO_PORT
Jon Paul Maloyd570d862015-02-05 08:36:38 -05001719 */
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001720static int tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,
1721 u32 dport, struct sk_buff **_skb)
Jon Paul Maloyd570d862015-02-05 08:36:38 -05001722{
1723 unsigned int lim;
1724 atomic_t *dcnt;
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001725 int err;
1726 struct sk_buff *skb;
1727 unsigned long time_limit = jiffies + 2;
Jon Paul Maloyd570d862015-02-05 08:36:38 -05001728
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001729 while (skb_queue_len(inputq)) {
Jon Paul Maloy51a00da2015-02-08 11:10:50 -05001730 if (unlikely(time_after_eq(jiffies, time_limit)))
1731 return TIPC_OK;
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001732 skb = tipc_skb_dequeue(inputq, dport);
1733 if (unlikely(!skb))
1734 return TIPC_OK;
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001735 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;
Jon Paul Maloyd570d862015-02-05 08:36:38 -05001749 return -TIPC_ERR_OVERLOAD;
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001750 }
Jon Paul Maloyd570d862015-02-05 08:36:38 -05001751 return TIPC_OK;
1752}
1753
1754/**
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001755 * 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
Allan Stephens0c3141e2008-04-15 00:22:02 -07001761 */
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001762int tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)
Allan Stephens0c3141e2008-04-15 00:22:02 -07001763{
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001764 u32 dnode, dport = 0;
Erik Hugne9871b272015-04-23 09:37:39 -04001765 int err;
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001766 struct sk_buff *skb;
Jon Paul Maloy9816f062014-05-14 05:39:15 -04001767 struct tipc_sock *tsk;
Jon Paul Maloyc5898632015-02-05 08:36:36 -05001768 struct tipc_net *tn;
Jon Paul Maloy9816f062014-05-14 05:39:15 -04001769 struct sock *sk;
Jon Paul Maloy9816f062014-05-14 05:39:15 -04001770
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001771 while (skb_queue_len(inputq)) {
Erik Hugne9871b272015-04-23 09:37:39 -04001772 err = -TIPC_ERR_NO_PORT;
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001773 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;
Jon Paul Maloye3a77562015-02-05 08:36:39 -05001798xmit:
Jon Paul Maloyc637c102015-02-05 08:36:41 -05001799 tipc_link_xmit_skb(net, skb, dnode, dport);
1800 }
Jon Paul Maloy1186adf2015-02-05 08:36:37 -05001801 return err ? -EHOSTUNREACH : 0;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001802}
1803
Ying Xue78eb3a52014-01-17 09:50:03 +08001804static 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
Per Lidenb97bf3f2006-01-02 19:04:38 +01001826/**
Ying Xue247f0f32014-02-18 16:06:46 +08001827 * tipc_connect - establish a connection to another TIPC port
Per Lidenb97bf3f2006-01-02 19:04:38 +01001828 * @sock: socket structure
1829 * @dest: socket address for destination port
1830 * @destlen: size of socket address data structure
Allan Stephens0c3141e2008-04-15 00:22:02 -07001831 * @flags: file-related flags associated with socket
Per Lidenb97bf3f2006-01-02 19:04:38 +01001832 *
1833 * Returns 0 on success, errno otherwise
1834 */
Ying Xue247f0f32014-02-18 16:06:46 +08001835static int tipc_connect(struct socket *sock, struct sockaddr *dest,
1836 int destlen, int flags)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001837{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001838 struct sock *sk = sock->sk;
Erik Hugnef2f80362015-03-19 09:02:19 +01001839 struct tipc_sock *tsk = tipc_sk(sk);
Allan Stephensb89741a2008-04-15 00:20:37 -07001840 struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest;
1841 struct msghdr m = {NULL,};
Erik Hugnef2f80362015-03-19 09:02:19 +01001842 long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout;
Ying Xue78eb3a52014-01-17 09:50:03 +08001843 socket_state previous;
Erik Hugnef2f80362015-03-19 09:02:19 +01001844 int res = 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001845
Allan Stephens0c3141e2008-04-15 00:22:02 -07001846 lock_sock(sk);
1847
Erik Hugnef2f80362015-03-19 09:02:19 +01001848 /* DGRAM/RDM connect(), just save the destaddr */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001849 if (sock->state == SS_READY) {
Erik Hugnef2f80362015-03-19 09:02:19 +01001850 if (dst->family == AF_UNSPEC) {
1851 memset(&tsk->remote, 0, sizeof(struct sockaddr_tipc));
1852 tsk->connected = 0;
Sasha Levin610600c2015-03-23 15:30:00 -04001853 } else if (destlen != sizeof(struct sockaddr_tipc)) {
1854 res = -EINVAL;
Erik Hugnef2f80362015-03-19 09:02:19 +01001855 } else {
1856 memcpy(&tsk->remote, dest, destlen);
1857 tsk->connected = 1;
1858 }
Allan Stephens0c3141e2008-04-15 00:22:02 -07001859 goto exit;
1860 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01001861
Allan Stephensb89741a2008-04-15 00:20:37 -07001862 /*
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 */
Allan Stephens0c3141e2008-04-15 00:22:02 -07001868 if (dst->addrtype == TIPC_ADDR_MCAST) {
1869 res = -EINVAL;
1870 goto exit;
1871 }
1872
Ying Xue78eb3a52014-01-17 09:50:03 +08001873 previous = sock->state;
Ying Xue584d24b2012-11-29 18:51:19 -05001874 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
Ying Xue39a02952015-03-02 15:37:47 +08001886 res = __tipc_sendmsg(sock, &m, 0);
Ying Xue584d24b2012-11-29 18:51:19 -05001887 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;
Ying Xue584d24b2012-11-29 18:51:19 -05001895 case SS_CONNECTING:
Ying Xue78eb3a52014-01-17 09:50:03 +08001896 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);
Ying Xue584d24b2012-11-29 18:51:19 -05001903 break;
1904 case SS_CONNECTED:
1905 res = -EISCONN;
1906 break;
1907 default:
1908 res = -EINVAL;
Ying Xue78eb3a52014-01-17 09:50:03 +08001909 break;
Allan Stephensb89741a2008-04-15 00:20:37 -07001910 }
Allan Stephens0c3141e2008-04-15 00:22:02 -07001911exit:
1912 release_sock(sk);
Allan Stephensb89741a2008-04-15 00:20:37 -07001913 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001914}
1915
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001916/**
Ying Xue247f0f32014-02-18 16:06:46 +08001917 * tipc_listen - allow socket to listen for incoming connections
Per Lidenb97bf3f2006-01-02 19:04:38 +01001918 * @sock: socket structure
1919 * @len: (unused)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001920 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001921 * Returns 0 on success, errno otherwise
1922 */
Ying Xue247f0f32014-02-18 16:06:46 +08001923static int tipc_listen(struct socket *sock, int len)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001924{
Allan Stephens0c3141e2008-04-15 00:22:02 -07001925 struct sock *sk = sock->sk;
1926 int res;
1927
1928 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01001929
Ying Xue245f3d32011-07-06 06:01:13 -04001930 if (sock->state != SS_UNCONNECTED)
Allan Stephens0c3141e2008-04-15 00:22:02 -07001931 res = -EINVAL;
1932 else {
1933 sock->state = SS_LISTENING;
1934 res = 0;
1935 }
1936
1937 release_sock(sk);
1938 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001939}
1940
Ying Xue6398e232014-01-17 09:50:04 +08001941static 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);
Ying Xuefe8e4642014-03-06 14:40:18 +01001955 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
Ying Xue6398e232014-01-17 09:50:04 +08001956 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;
Ying Xue6398e232014-01-17 09:50:04 +08001966 err = -EAGAIN;
1967 if (!timeo)
1968 break;
Erik Hugne143fe222015-03-09 10:43:42 +01001969 err = sock_intr_errno(timeo);
1970 if (signal_pending(current))
1971 break;
Ying Xue6398e232014-01-17 09:50:04 +08001972 }
1973 finish_wait(sk_sleep(sk), &wait);
1974 return err;
1975}
1976
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001977/**
Ying Xue247f0f32014-02-18 16:06:46 +08001978 * tipc_accept - wait for connection request
Per Lidenb97bf3f2006-01-02 19:04:38 +01001979 * @sock: listening socket
1980 * @newsock: new socket that is to be connected
1981 * @flags: file-related flags associated with socket
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001982 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01001983 * Returns 0 on success, errno otherwise
1984 */
Ying Xue247f0f32014-02-18 16:06:46 +08001985static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags)
Per Lidenb97bf3f2006-01-02 19:04:38 +01001986{
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001987 struct sock *new_sk, *sk = sock->sk;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001988 struct sk_buff *buf;
Jon Paul Maloy301bae52014-08-22 18:09:20 -04001989 struct tipc_sock *new_tsock;
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05001990 struct tipc_msg *msg;
Ying Xue6398e232014-01-17 09:50:04 +08001991 long timeo;
Allan Stephens0c3141e2008-04-15 00:22:02 -07001992 int res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01001993
Allan Stephens0c3141e2008-04-15 00:22:02 -07001994 lock_sock(sk);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09001995
Allan Stephens0c3141e2008-04-15 00:22:02 -07001996 if (sock->state != SS_LISTENING) {
1997 res = -EINVAL;
1998 goto exit;
1999 }
Ying Xue6398e232014-01-17 09:50:04 +08002000 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
2001 res = tipc_wait_for_accept(sock, timeo);
2002 if (res)
2003 goto exit;
Allan Stephens0c3141e2008-04-15 00:22:02 -07002004
2005 buf = skb_peek(&sk->sk_receive_queue);
2006
Ying Xuec5fa7b32013-06-17 10:54:39 -04002007 res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1);
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002008 if (res)
2009 goto exit;
Stephen Smalleyfdd75ea2015-07-07 09:43:45 -04002010 security_sk_clone(sock->sk, new_sock->sk);
Allan Stephens0c3141e2008-04-15 00:22:02 -07002011
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002012 new_sk = new_sock->sk;
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002013 new_tsock = tipc_sk(new_sk);
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002014 msg = buf_msg(buf);
Allan Stephens0c3141e2008-04-15 00:22:02 -07002015
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002016 /* we lock on new_sk; but lockdep sees the lock on sk */
2017 lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING);
Allan Stephens0c3141e2008-04-15 00:22:02 -07002018
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002019 /*
2020 * Reject any stray messages received by new socket
2021 * before the socket lock was taken (very, very unlikely)
2022 */
Jon Paul Maloy2e84c602014-08-22 18:09:18 -04002023 tsk_rej_rx_queue(new_sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002024
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002025 /* Connect new socket to it's peer */
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002026 tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg));
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002027 new_sock->state = SS_CONNECTED;
Per Lidenb97bf3f2006-01-02 19:04:38 +01002028
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002029 tsk_set_importance(new_tsock, msg_importance(msg));
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002030 if (msg_named(msg)) {
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002031 new_tsock->conn_type = msg_nametype(msg);
2032 new_tsock->conn_instance = msg_nameinst(msg);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002033 }
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002034
2035 /*
2036 * Respond to 'SYN-' by discarding it & returning 'ACK'-.
2037 * Respond to 'SYN+' by queuing it on new socket.
2038 */
2039 if (!msg_data_sz(msg)) {
2040 struct msghdr m = {NULL,};
2041
Jon Paul Maloy2e84c602014-08-22 18:09:18 -04002042 tsk_advance_rx_queue(sk);
Ying Xue39a02952015-03-02 15:37:47 +08002043 __tipc_send_stream(new_sock, &m, 0);
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002044 } else {
2045 __skb_dequeue(&sk->sk_receive_queue);
2046 __skb_queue_head(&new_sk->sk_receive_queue, buf);
Ying Xueaba79f32013-01-20 23:30:09 +01002047 skb_set_owner_r(buf, new_sk);
Paul Gortmaker0fef8f22012-12-04 11:01:55 -05002048 }
2049 release_sock(new_sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002050exit:
Allan Stephens0c3141e2008-04-15 00:22:02 -07002051 release_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002052 return res;
2053}
2054
2055/**
Ying Xue247f0f32014-02-18 16:06:46 +08002056 * tipc_shutdown - shutdown socket connection
Per Lidenb97bf3f2006-01-02 19:04:38 +01002057 * @sock: socket structure
Allan Stephense247a8f2008-03-06 15:05:38 -08002058 * @how: direction to close (must be SHUT_RDWR)
Per Lidenb97bf3f2006-01-02 19:04:38 +01002059 *
2060 * Terminates connection (if necessary), then purges socket's receive queue.
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002061 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01002062 * Returns 0 on success, errno otherwise
2063 */
Ying Xue247f0f32014-02-18 16:06:46 +08002064static int tipc_shutdown(struct socket *sock, int how)
Per Lidenb97bf3f2006-01-02 19:04:38 +01002065{
Allan Stephens0c3141e2008-04-15 00:22:02 -07002066 struct sock *sk = sock->sk;
Ying Xuef2f98002015-01-09 15:27:05 +08002067 struct net *net = sock_net(sk);
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04002068 struct tipc_sock *tsk = tipc_sk(sk);
Ying Xuea6ca1092014-11-26 11:41:55 +08002069 struct sk_buff *skb;
Jon Paul Maloy80e44c22014-08-22 18:09:10 -04002070 u32 dnode;
Per Lidenb97bf3f2006-01-02 19:04:38 +01002071 int res;
2072
Allan Stephense247a8f2008-03-06 15:05:38 -08002073 if (how != SHUT_RDWR)
2074 return -EINVAL;
Per Lidenb97bf3f2006-01-02 19:04:38 +01002075
Allan Stephens0c3141e2008-04-15 00:22:02 -07002076 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002077
2078 switch (sock->state) {
Allan Stephens0c3141e2008-04-15 00:22:02 -07002079 case SS_CONNECTING:
Per Lidenb97bf3f2006-01-02 19:04:38 +01002080 case SS_CONNECTED:
2081
Per Lidenb97bf3f2006-01-02 19:04:38 +01002082restart:
Paul Gortmaker617d3c72012-04-30 15:29:02 -04002083 /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */
Ying Xuea6ca1092014-11-26 11:41:55 +08002084 skb = __skb_dequeue(&sk->sk_receive_queue);
2085 if (skb) {
2086 if (TIPC_SKB_CB(skb)->handle != NULL) {
2087 kfree_skb(skb);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002088 goto restart;
2089 }
Jon Paul Maloyc5898632015-02-05 08:36:36 -05002090 if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode,
Ying Xue34747532015-01-09 15:27:10 +08002091 TIPC_CONN_SHUTDOWN))
Ying Xuef2f98002015-01-09 15:27:05 +08002092 tipc_link_xmit_skb(net, skb, dnode,
2093 tsk->portid);
Allan Stephens0c3141e2008-04-15 00:22:02 -07002094 } else {
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002095 dnode = tsk_peer_node(tsk);
Jon Paul Maloyc5898632015-02-05 08:36:36 -05002096
2097 skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
Jon Paul Maloy80e44c22014-08-22 18:09:10 -04002098 TIPC_CONN_MSG, SHORT_H_SIZE,
Jon Paul Maloyc5898632015-02-05 08:36:36 -05002099 0, dnode, tsk_own_node(tsk),
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002100 tsk_peer_port(tsk),
Ying Xue07f6c4b2015-01-07 13:41:58 +08002101 tsk->portid, TIPC_CONN_SHUTDOWN);
Ying Xuef2f98002015-01-09 15:27:05 +08002102 tipc_link_xmit_skb(net, skb, dnode, tsk->portid);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002103 }
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002104 tsk->connected = 0;
Allan Stephens0c3141e2008-04-15 00:22:02 -07002105 sock->state = SS_DISCONNECTING;
Ying Xuef2f98002015-01-09 15:27:05 +08002106 tipc_node_remove_conn(net, dnode, tsk->portid);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002107 /* fall through */
2108
2109 case SS_DISCONNECTING:
2110
Ying Xue75031152012-10-29 09:38:15 -04002111 /* Discard any unreceived messages */
Ying Xue57467e52013-01-20 23:30:08 +01002112 __skb_queue_purge(&sk->sk_receive_queue);
Ying Xue75031152012-10-29 09:38:15 -04002113
2114 /* Wake up anyone sleeping in poll */
2115 sk->sk_state_change(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002116 res = 0;
2117 break;
2118
2119 default:
2120 res = -ENOTCONN;
2121 }
2122
Allan Stephens0c3141e2008-04-15 00:22:02 -07002123 release_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002124 return res;
2125}
2126
Ying Xuef2f2a962015-01-09 15:27:02 +08002127static void tipc_sk_timeout(unsigned long data)
Jon Paul Maloy57289012014-08-22 18:09:09 -04002128{
Ying Xuef2f2a962015-01-09 15:27:02 +08002129 struct tipc_sock *tsk = (struct tipc_sock *)data;
2130 struct sock *sk = &tsk->sk;
Ying Xuea6ca1092014-11-26 11:41:55 +08002131 struct sk_buff *skb = NULL;
Jon Paul Maloy57289012014-08-22 18:09:09 -04002132 u32 peer_port, peer_node;
Jon Paul Maloyc5898632015-02-05 08:36:36 -05002133 u32 own_node = tsk_own_node(tsk);
Jon Paul Maloy57289012014-08-22 18:09:09 -04002134
Jon Paul Maloy57289012014-08-22 18:09:09 -04002135 bh_lock_sock(sk);
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002136 if (!tsk->connected) {
Jon Paul Maloy6c9808c2014-08-22 18:09:16 -04002137 bh_unlock_sock(sk);
2138 goto exit;
2139 }
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002140 peer_port = tsk_peer_port(tsk);
2141 peer_node = tsk_peer_node(tsk);
Jon Paul Maloy57289012014-08-22 18:09:09 -04002142
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002143 if (tsk->probing_state == TIPC_CONN_PROBING) {
Erik Hugneb3be5e32015-06-09 17:27:12 +02002144 if (!sock_owned_by_user(sk)) {
2145 sk->sk_socket->state = SS_DISCONNECTING;
2146 tsk->connected = 0;
2147 tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk),
2148 tsk_peer_port(tsk));
2149 sk->sk_state_change(sk);
2150 } else {
2151 /* Try again later */
2152 sk_reset_timer(sk, &sk->sk_timer, (HZ / 20));
2153 }
2154
Jon Paul Maloy57289012014-08-22 18:09:09 -04002155 } else {
Jon Paul Maloyc5898632015-02-05 08:36:36 -05002156 skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE,
2157 INT_H_SIZE, 0, peer_node, own_node,
Ying Xuef2f2a962015-01-09 15:27:02 +08002158 peer_port, tsk->portid, TIPC_OK);
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002159 tsk->probing_state = TIPC_CONN_PROBING;
Ying Xue3721e9c2015-01-13 17:07:48 +08002160 sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv);
Jon Paul Maloy57289012014-08-22 18:09:09 -04002161 }
2162 bh_unlock_sock(sk);
Ying Xuea6ca1092014-11-26 11:41:55 +08002163 if (skb)
Ying Xuef2f98002015-01-09 15:27:05 +08002164 tipc_link_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid);
Jon Paul Maloy6c9808c2014-08-22 18:09:16 -04002165exit:
Ying Xue07f6c4b2015-01-07 13:41:58 +08002166 sock_put(sk);
Jon Paul Maloy57289012014-08-22 18:09:09 -04002167}
2168
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002169static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002170 struct tipc_name_seq const *seq)
2171{
Ying Xuef2f98002015-01-09 15:27:05 +08002172 struct net *net = sock_net(&tsk->sk);
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002173 struct publication *publ;
2174 u32 key;
2175
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002176 if (tsk->connected)
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002177 return -EINVAL;
Ying Xue07f6c4b2015-01-07 13:41:58 +08002178 key = tsk->portid + tsk->pub_count + 1;
2179 if (key == tsk->portid)
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002180 return -EADDRINUSE;
2181
Ying Xuef2f98002015-01-09 15:27:05 +08002182 publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper,
Ying Xue07f6c4b2015-01-07 13:41:58 +08002183 scope, tsk->portid, key);
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002184 if (unlikely(!publ))
2185 return -EINVAL;
2186
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002187 list_add(&publ->pport_list, &tsk->publications);
2188 tsk->pub_count++;
2189 tsk->published = 1;
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002190 return 0;
2191}
2192
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002193static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002194 struct tipc_name_seq const *seq)
2195{
Ying Xuef2f98002015-01-09 15:27:05 +08002196 struct net *net = sock_net(&tsk->sk);
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002197 struct publication *publ;
2198 struct publication *safe;
2199 int rc = -EINVAL;
2200
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002201 list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) {
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002202 if (seq) {
2203 if (publ->scope != scope)
2204 continue;
2205 if (publ->type != seq->type)
2206 continue;
2207 if (publ->lower != seq->lower)
2208 continue;
2209 if (publ->upper != seq->upper)
2210 break;
Ying Xuef2f98002015-01-09 15:27:05 +08002211 tipc_nametbl_withdraw(net, publ->type, publ->lower,
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002212 publ->ref, publ->key);
2213 rc = 0;
2214 break;
2215 }
Ying Xuef2f98002015-01-09 15:27:05 +08002216 tipc_nametbl_withdraw(net, publ->type, publ->lower,
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002217 publ->ref, publ->key);
2218 rc = 0;
2219 }
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002220 if (list_empty(&tsk->publications))
2221 tsk->published = 0;
Jon Paul Maloy0fc87aa2014-08-22 18:09:17 -04002222 return rc;
2223}
2224
Jon Paul Maloy5a9ee0be2014-08-22 18:09:14 -04002225/* tipc_sk_reinit: set non-zero address in all existing sockets
2226 * when we go from standalone to network mode.
2227 */
Ying Xuee05b31f2015-01-09 15:27:08 +08002228void tipc_sk_reinit(struct net *net)
Jon Paul Maloy5a9ee0be2014-08-22 18:09:14 -04002229{
Ying Xuee05b31f2015-01-09 15:27:08 +08002230 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue07f6c4b2015-01-07 13:41:58 +08002231 const struct bucket_table *tbl;
2232 struct rhash_head *pos;
2233 struct tipc_sock *tsk;
Jon Paul Maloy5a9ee0be2014-08-22 18:09:14 -04002234 struct tipc_msg *msg;
Ying Xue07f6c4b2015-01-07 13:41:58 +08002235 int i;
Jon Paul Maloy5a9ee0be2014-08-22 18:09:14 -04002236
Ying Xue07f6c4b2015-01-07 13:41:58 +08002237 rcu_read_lock();
Ying Xuee05b31f2015-01-09 15:27:08 +08002238 tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht);
Ying Xue07f6c4b2015-01-07 13:41:58 +08002239 for (i = 0; i < tbl->size; i++) {
2240 rht_for_each_entry_rcu(tsk, pos, tbl, i, node) {
2241 spin_lock_bh(&tsk->sk.sk_lock.slock);
2242 msg = &tsk->phdr;
Ying Xue34747532015-01-09 15:27:10 +08002243 msg_set_prevnode(msg, tn->own_addr);
2244 msg_set_orignode(msg, tn->own_addr);
Ying Xue07f6c4b2015-01-07 13:41:58 +08002245 spin_unlock_bh(&tsk->sk.sk_lock.slock);
2246 }
2247 }
2248 rcu_read_unlock();
2249}
2250
Ying Xuee05b31f2015-01-09 15:27:08 +08002251static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid)
Ying Xue07f6c4b2015-01-07 13:41:58 +08002252{
Ying Xuee05b31f2015-01-09 15:27:08 +08002253 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue07f6c4b2015-01-07 13:41:58 +08002254 struct tipc_sock *tsk;
2255
2256 rcu_read_lock();
Herbert Xu6cca72892015-03-20 21:57:05 +11002257 tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params);
Ying Xue07f6c4b2015-01-07 13:41:58 +08002258 if (tsk)
2259 sock_hold(&tsk->sk);
2260 rcu_read_unlock();
2261
2262 return tsk;
2263}
2264
2265static int tipc_sk_insert(struct tipc_sock *tsk)
2266{
Ying Xuee05b31f2015-01-09 15:27:08 +08002267 struct sock *sk = &tsk->sk;
2268 struct net *net = sock_net(sk);
2269 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xue07f6c4b2015-01-07 13:41:58 +08002270 u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1;
2271 u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT;
2272
2273 while (remaining--) {
2274 portid++;
2275 if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT))
2276 portid = TIPC_MIN_PORT;
2277 tsk->portid = portid;
2278 sock_hold(&tsk->sk);
Herbert Xu6cca72892015-03-20 21:57:05 +11002279 if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node,
2280 tsk_rht_params))
Ying Xue07f6c4b2015-01-07 13:41:58 +08002281 return 0;
2282 sock_put(&tsk->sk);
2283 }
2284
2285 return -1;
2286}
2287
2288static void tipc_sk_remove(struct tipc_sock *tsk)
2289{
2290 struct sock *sk = &tsk->sk;
Ying Xuee05b31f2015-01-09 15:27:08 +08002291 struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id);
Ying Xue07f6c4b2015-01-07 13:41:58 +08002292
Herbert Xu6cca72892015-03-20 21:57:05 +11002293 if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) {
Ying Xue07f6c4b2015-01-07 13:41:58 +08002294 WARN_ON(atomic_read(&sk->sk_refcnt) == 1);
2295 __sock_put(sk);
Jon Paul Maloy5a9ee0be2014-08-22 18:09:14 -04002296 }
2297}
2298
Herbert Xu6cca72892015-03-20 21:57:05 +11002299static const struct rhashtable_params tsk_rht_params = {
2300 .nelem_hint = 192,
2301 .head_offset = offsetof(struct tipc_sock, node),
2302 .key_offset = offsetof(struct tipc_sock, portid),
2303 .key_len = sizeof(u32), /* portid */
Herbert Xu6cca72892015-03-20 21:57:05 +11002304 .max_size = 1048576,
2305 .min_size = 256,
Thomas Grafb5e2c152015-03-24 20:42:19 +00002306 .automatic_shrinking = true,
Herbert Xu6cca72892015-03-20 21:57:05 +11002307};
2308
Ying Xuee05b31f2015-01-09 15:27:08 +08002309int tipc_sk_rht_init(struct net *net)
Jon Paul Maloy808d90f2014-08-22 18:09:19 -04002310{
Ying Xuee05b31f2015-01-09 15:27:08 +08002311 struct tipc_net *tn = net_generic(net, tipc_net_id);
Jon Paul Maloy808d90f2014-08-22 18:09:19 -04002312
Herbert Xu6cca72892015-03-20 21:57:05 +11002313 return rhashtable_init(&tn->sk_rht, &tsk_rht_params);
Jon Paul Maloy808d90f2014-08-22 18:09:19 -04002314}
2315
Ying Xuee05b31f2015-01-09 15:27:08 +08002316void tipc_sk_rht_destroy(struct net *net)
Jon Paul Maloy808d90f2014-08-22 18:09:19 -04002317{
Ying Xuee05b31f2015-01-09 15:27:08 +08002318 struct tipc_net *tn = net_generic(net, tipc_net_id);
2319
Ying Xue07f6c4b2015-01-07 13:41:58 +08002320 /* Wait for socket readers to complete */
2321 synchronize_net();
Jon Paul Maloy808d90f2014-08-22 18:09:19 -04002322
Ying Xuee05b31f2015-01-09 15:27:08 +08002323 rhashtable_destroy(&tn->sk_rht);
Jon Paul Maloy808d90f2014-08-22 18:09:19 -04002324}
2325
2326/**
Ying Xue247f0f32014-02-18 16:06:46 +08002327 * tipc_setsockopt - set socket option
Per Lidenb97bf3f2006-01-02 19:04:38 +01002328 * @sock: socket structure
2329 * @lvl: option level
2330 * @opt: option identifier
2331 * @ov: pointer to new option value
2332 * @ol: length of option value
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002333 *
2334 * For stream sockets only, accepts and ignores all IPPROTO_TCP options
Per Lidenb97bf3f2006-01-02 19:04:38 +01002335 * (to ease compatibility).
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002336 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01002337 * Returns 0 on success, errno otherwise
2338 */
Ying Xue247f0f32014-02-18 16:06:46 +08002339static int tipc_setsockopt(struct socket *sock, int lvl, int opt,
2340 char __user *ov, unsigned int ol)
Per Lidenb97bf3f2006-01-02 19:04:38 +01002341{
Allan Stephens0c3141e2008-04-15 00:22:02 -07002342 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04002343 struct tipc_sock *tsk = tipc_sk(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002344 u32 value;
2345 int res;
2346
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002347 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
2348 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +01002349 if (lvl != SOL_TIPC)
2350 return -ENOPROTOOPT;
2351 if (ol < sizeof(value))
2352 return -EINVAL;
Allan Stephens2db99832010-12-31 18:59:33 +00002353 res = get_user(value, (u32 __user *)ov);
2354 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +01002355 return res;
2356
Allan Stephens0c3141e2008-04-15 00:22:02 -07002357 lock_sock(sk);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002358
Per Lidenb97bf3f2006-01-02 19:04:38 +01002359 switch (opt) {
2360 case TIPC_IMPORTANCE:
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002361 res = tsk_set_importance(tsk, value);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002362 break;
2363 case TIPC_SRC_DROPPABLE:
2364 if (sock->type != SOCK_STREAM)
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002365 tsk_set_unreliable(tsk, value);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002366 else
Per Lidenb97bf3f2006-01-02 19:04:38 +01002367 res = -ENOPROTOOPT;
2368 break;
2369 case TIPC_DEST_DROPPABLE:
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002370 tsk_set_unreturnable(tsk, value);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002371 break;
2372 case TIPC_CONN_TIMEOUT:
Allan Stephensa0f40f02011-05-26 13:44:34 -04002373 tipc_sk(sk)->conn_timeout = value;
Allan Stephens0c3141e2008-04-15 00:22:02 -07002374 /* no need to set "res", since already 0 at this point */
Per Lidenb97bf3f2006-01-02 19:04:38 +01002375 break;
2376 default:
2377 res = -EINVAL;
2378 }
2379
Allan Stephens0c3141e2008-04-15 00:22:02 -07002380 release_sock(sk);
2381
Per Lidenb97bf3f2006-01-02 19:04:38 +01002382 return res;
2383}
2384
2385/**
Ying Xue247f0f32014-02-18 16:06:46 +08002386 * tipc_getsockopt - get socket option
Per Lidenb97bf3f2006-01-02 19:04:38 +01002387 * @sock: socket structure
2388 * @lvl: option level
2389 * @opt: option identifier
2390 * @ov: receptacle for option value
2391 * @ol: receptacle for length of option value
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002392 *
2393 * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
Per Lidenb97bf3f2006-01-02 19:04:38 +01002394 * (to ease compatibility).
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002395 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01002396 * Returns 0 on success, errno otherwise
2397 */
Ying Xue247f0f32014-02-18 16:06:46 +08002398static int tipc_getsockopt(struct socket *sock, int lvl, int opt,
2399 char __user *ov, int __user *ol)
Per Lidenb97bf3f2006-01-02 19:04:38 +01002400{
Allan Stephens0c3141e2008-04-15 00:22:02 -07002401 struct sock *sk = sock->sk;
Jon Paul Maloy58ed9442014-03-12 11:31:12 -04002402 struct tipc_sock *tsk = tipc_sk(sk);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002403 int len;
Per Lidenb97bf3f2006-01-02 19:04:38 +01002404 u32 value;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002405 int res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01002406
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002407 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
2408 return put_user(0, ol);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002409 if (lvl != SOL_TIPC)
2410 return -ENOPROTOOPT;
Allan Stephens2db99832010-12-31 18:59:33 +00002411 res = get_user(len, ol);
2412 if (res)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002413 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +01002414
Allan Stephens0c3141e2008-04-15 00:22:02 -07002415 lock_sock(sk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002416
2417 switch (opt) {
2418 case TIPC_IMPORTANCE:
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002419 value = tsk_importance(tsk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002420 break;
2421 case TIPC_SRC_DROPPABLE:
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002422 value = tsk_unreliable(tsk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002423 break;
2424 case TIPC_DEST_DROPPABLE:
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002425 value = tsk_unreturnable(tsk);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002426 break;
2427 case TIPC_CONN_TIMEOUT:
Jon Paul Maloy301bae52014-08-22 18:09:20 -04002428 value = tsk->conn_timeout;
Allan Stephens0c3141e2008-04-15 00:22:02 -07002429 /* no need to set "res", since already 0 at this point */
Per Lidenb97bf3f2006-01-02 19:04:38 +01002430 break;
Allan Stephens0e659672010-12-31 18:59:32 +00002431 case TIPC_NODE_RECVQ_DEPTH:
Ying Xue9da3d472012-11-27 06:15:27 -05002432 value = 0; /* was tipc_queue_size, now obsolete */
oscar.medina@motorola.com66506132009-06-30 03:25:39 +00002433 break;
Allan Stephens0e659672010-12-31 18:59:32 +00002434 case TIPC_SOCK_RECVQ_DEPTH:
oscar.medina@motorola.com66506132009-06-30 03:25:39 +00002435 value = skb_queue_len(&sk->sk_receive_queue);
2436 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +01002437 default:
2438 res = -EINVAL;
2439 }
2440
Allan Stephens0c3141e2008-04-15 00:22:02 -07002441 release_sock(sk);
2442
Paul Gortmaker25860c32010-12-31 18:59:31 +00002443 if (res)
2444 return res; /* "get" failed */
Per Lidenb97bf3f2006-01-02 19:04:38 +01002445
Paul Gortmaker25860c32010-12-31 18:59:31 +00002446 if (len < sizeof(value))
2447 return -EINVAL;
2448
2449 if (copy_to_user(ov, &value, sizeof(value)))
2450 return -EFAULT;
2451
2452 return put_user(sizeof(value), ol);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002453}
2454
Ying Xuef2f98002015-01-09 15:27:05 +08002455static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
Erik Hugne78acb1f2014-04-24 16:26:47 +02002456{
Ying Xuef2f98002015-01-09 15:27:05 +08002457 struct sock *sk = sock->sk;
Erik Hugne78acb1f2014-04-24 16:26:47 +02002458 struct tipc_sioc_ln_req lnr;
2459 void __user *argp = (void __user *)arg;
2460
2461 switch (cmd) {
2462 case SIOCGETLINKNAME:
2463 if (copy_from_user(&lnr, argp, sizeof(lnr)))
2464 return -EFAULT;
Ying Xuef2f98002015-01-09 15:27:05 +08002465 if (!tipc_node_get_linkname(sock_net(sk),
2466 lnr.bearer_id & 0xffff, lnr.peer,
Erik Hugne78acb1f2014-04-24 16:26:47 +02002467 lnr.linkname, TIPC_MAX_LINK_NAME)) {
2468 if (copy_to_user(argp, &lnr, sizeof(lnr)))
2469 return -EFAULT;
2470 return 0;
2471 }
2472 return -EADDRNOTAVAIL;
Erik Hugne78acb1f2014-04-24 16:26:47 +02002473 default:
2474 return -ENOIOCTLCMD;
2475 }
2476}
2477
Ben Hutchingsae86b9e2012-07-10 10:55:35 +00002478/* Protocol switches for the various types of TIPC sockets */
2479
Florian Westphalbca65ea2008-02-07 18:18:01 -08002480static const struct proto_ops msg_ops = {
Allan Stephens0e659672010-12-31 18:59:32 +00002481 .owner = THIS_MODULE,
Per Lidenb97bf3f2006-01-02 19:04:38 +01002482 .family = AF_TIPC,
Ying Xue247f0f32014-02-18 16:06:46 +08002483 .release = tipc_release,
2484 .bind = tipc_bind,
2485 .connect = tipc_connect,
Allan Stephens5eee6a62007-06-10 17:24:55 -07002486 .socketpair = sock_no_socketpair,
Ying Xue245f3d32011-07-06 06:01:13 -04002487 .accept = sock_no_accept,
Ying Xue247f0f32014-02-18 16:06:46 +08002488 .getname = tipc_getname,
2489 .poll = tipc_poll,
Erik Hugne78acb1f2014-04-24 16:26:47 +02002490 .ioctl = tipc_ioctl,
Ying Xue245f3d32011-07-06 06:01:13 -04002491 .listen = sock_no_listen,
Ying Xue247f0f32014-02-18 16:06:46 +08002492 .shutdown = tipc_shutdown,
2493 .setsockopt = tipc_setsockopt,
2494 .getsockopt = tipc_getsockopt,
2495 .sendmsg = tipc_sendmsg,
2496 .recvmsg = tipc_recvmsg,
YOSHIFUJI Hideaki82387452007-07-19 10:44:56 +09002497 .mmap = sock_no_mmap,
2498 .sendpage = sock_no_sendpage
Per Lidenb97bf3f2006-01-02 19:04:38 +01002499};
2500
Florian Westphalbca65ea2008-02-07 18:18:01 -08002501static const struct proto_ops packet_ops = {
Allan Stephens0e659672010-12-31 18:59:32 +00002502 .owner = THIS_MODULE,
Per Lidenb97bf3f2006-01-02 19:04:38 +01002503 .family = AF_TIPC,
Ying Xue247f0f32014-02-18 16:06:46 +08002504 .release = tipc_release,
2505 .bind = tipc_bind,
2506 .connect = tipc_connect,
Allan Stephens5eee6a62007-06-10 17:24:55 -07002507 .socketpair = sock_no_socketpair,
Ying Xue247f0f32014-02-18 16:06:46 +08002508 .accept = tipc_accept,
2509 .getname = tipc_getname,
2510 .poll = tipc_poll,
Erik Hugne78acb1f2014-04-24 16:26:47 +02002511 .ioctl = tipc_ioctl,
Ying Xue247f0f32014-02-18 16:06:46 +08002512 .listen = tipc_listen,
2513 .shutdown = tipc_shutdown,
2514 .setsockopt = tipc_setsockopt,
2515 .getsockopt = tipc_getsockopt,
2516 .sendmsg = tipc_send_packet,
2517 .recvmsg = tipc_recvmsg,
YOSHIFUJI Hideaki82387452007-07-19 10:44:56 +09002518 .mmap = sock_no_mmap,
2519 .sendpage = sock_no_sendpage
Per Lidenb97bf3f2006-01-02 19:04:38 +01002520};
2521
Florian Westphalbca65ea2008-02-07 18:18:01 -08002522static const struct proto_ops stream_ops = {
Allan Stephens0e659672010-12-31 18:59:32 +00002523 .owner = THIS_MODULE,
Per Lidenb97bf3f2006-01-02 19:04:38 +01002524 .family = AF_TIPC,
Ying Xue247f0f32014-02-18 16:06:46 +08002525 .release = tipc_release,
2526 .bind = tipc_bind,
2527 .connect = tipc_connect,
Allan Stephens5eee6a62007-06-10 17:24:55 -07002528 .socketpair = sock_no_socketpair,
Ying Xue247f0f32014-02-18 16:06:46 +08002529 .accept = tipc_accept,
2530 .getname = tipc_getname,
2531 .poll = tipc_poll,
Erik Hugne78acb1f2014-04-24 16:26:47 +02002532 .ioctl = tipc_ioctl,
Ying Xue247f0f32014-02-18 16:06:46 +08002533 .listen = tipc_listen,
2534 .shutdown = tipc_shutdown,
2535 .setsockopt = tipc_setsockopt,
2536 .getsockopt = tipc_getsockopt,
2537 .sendmsg = tipc_send_stream,
2538 .recvmsg = tipc_recv_stream,
YOSHIFUJI Hideaki82387452007-07-19 10:44:56 +09002539 .mmap = sock_no_mmap,
2540 .sendpage = sock_no_sendpage
Per Lidenb97bf3f2006-01-02 19:04:38 +01002541};
2542
Florian Westphalbca65ea2008-02-07 18:18:01 -08002543static const struct net_proto_family tipc_family_ops = {
Allan Stephens0e659672010-12-31 18:59:32 +00002544 .owner = THIS_MODULE,
Per Lidenb97bf3f2006-01-02 19:04:38 +01002545 .family = AF_TIPC,
Ying Xuec5fa7b32013-06-17 10:54:39 -04002546 .create = tipc_sk_create
Per Lidenb97bf3f2006-01-02 19:04:38 +01002547};
2548
2549static struct proto tipc_proto = {
2550 .name = "TIPC",
2551 .owner = THIS_MODULE,
Ying Xuecc79dd12013-06-17 10:54:37 -04002552 .obj_size = sizeof(struct tipc_sock),
2553 .sysctl_rmem = sysctl_tipc_rmem
Per Lidenb97bf3f2006-01-02 19:04:38 +01002554};
2555
2556/**
Per Liden4323add2006-01-18 00:38:21 +01002557 * tipc_socket_init - initialize TIPC socket interface
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002558 *
Per Lidenb97bf3f2006-01-02 19:04:38 +01002559 * Returns 0 on success, errno otherwise
2560 */
Per Liden4323add2006-01-18 00:38:21 +01002561int tipc_socket_init(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +01002562{
2563 int res;
2564
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09002565 res = proto_register(&tipc_proto, 1);
Per Lidenb97bf3f2006-01-02 19:04:38 +01002566 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -04002567 pr_err("Failed to register TIPC protocol type\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +01002568 goto out;
2569 }
2570
2571 res = sock_register(&tipc_family_ops);
2572 if (res) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -04002573 pr_err("Failed to register TIPC socket type\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +01002574 proto_unregister(&tipc_proto);
2575 goto out;
2576 }
Per Lidenb97bf3f2006-01-02 19:04:38 +01002577 out:
2578 return res;
2579}
2580
2581/**
Per Liden4323add2006-01-18 00:38:21 +01002582 * tipc_socket_stop - stop TIPC socket interface
Per Lidenb97bf3f2006-01-02 19:04:38 +01002583 */
Per Liden4323add2006-01-18 00:38:21 +01002584void tipc_socket_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +01002585{
Per Lidenb97bf3f2006-01-02 19:04:38 +01002586 sock_unregister(tipc_family_ops.family);
2587 proto_unregister(&tipc_proto);
2588}
Richard Alpe34b78a122014-11-20 10:29:10 +01002589
2590/* Caller should hold socket lock for the passed tipc socket. */
Richard Alped8182802014-11-24 11:10:29 +01002591static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk)
Richard Alpe34b78a122014-11-20 10:29:10 +01002592{
2593 u32 peer_node;
2594 u32 peer_port;
2595 struct nlattr *nest;
2596
2597 peer_node = tsk_peer_node(tsk);
2598 peer_port = tsk_peer_port(tsk);
2599
2600 nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON);
2601
2602 if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node))
2603 goto msg_full;
2604 if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port))
2605 goto msg_full;
2606
2607 if (tsk->conn_type != 0) {
2608 if (nla_put_flag(skb, TIPC_NLA_CON_FLAG))
2609 goto msg_full;
2610 if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type))
2611 goto msg_full;
2612 if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance))
2613 goto msg_full;
2614 }
2615 nla_nest_end(skb, nest);
2616
2617 return 0;
2618
2619msg_full:
2620 nla_nest_cancel(skb, nest);
2621
2622 return -EMSGSIZE;
2623}
2624
2625/* Caller should hold socket lock for the passed tipc socket. */
Richard Alped8182802014-11-24 11:10:29 +01002626static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb,
2627 struct tipc_sock *tsk)
Richard Alpe34b78a122014-11-20 10:29:10 +01002628{
2629 int err;
2630 void *hdr;
2631 struct nlattr *attrs;
Ying Xue34747532015-01-09 15:27:10 +08002632 struct net *net = sock_net(skb->sk);
2633 struct tipc_net *tn = net_generic(net, tipc_net_id);
Richard Alpe34b78a122014-11-20 10:29:10 +01002634
2635 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
Richard Alpebfb3e5d2015-02-09 09:50:03 +01002636 &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET);
Richard Alpe34b78a122014-11-20 10:29:10 +01002637 if (!hdr)
2638 goto msg_cancel;
2639
2640 attrs = nla_nest_start(skb, TIPC_NLA_SOCK);
2641 if (!attrs)
2642 goto genlmsg_cancel;
Ying Xue07f6c4b2015-01-07 13:41:58 +08002643 if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid))
Richard Alpe34b78a122014-11-20 10:29:10 +01002644 goto attr_msg_cancel;
Ying Xue34747532015-01-09 15:27:10 +08002645 if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr))
Richard Alpe34b78a122014-11-20 10:29:10 +01002646 goto attr_msg_cancel;
2647
2648 if (tsk->connected) {
2649 err = __tipc_nl_add_sk_con(skb, tsk);
2650 if (err)
2651 goto attr_msg_cancel;
2652 } else if (!list_empty(&tsk->publications)) {
2653 if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL))
2654 goto attr_msg_cancel;
2655 }
2656 nla_nest_end(skb, attrs);
2657 genlmsg_end(skb, hdr);
2658
2659 return 0;
2660
2661attr_msg_cancel:
2662 nla_nest_cancel(skb, attrs);
2663genlmsg_cancel:
2664 genlmsg_cancel(skb, hdr);
2665msg_cancel:
2666 return -EMSGSIZE;
2667}
2668
2669int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb)
2670{
2671 int err;
2672 struct tipc_sock *tsk;
Ying Xue07f6c4b2015-01-07 13:41:58 +08002673 const struct bucket_table *tbl;
2674 struct rhash_head *pos;
Ying Xuee05b31f2015-01-09 15:27:08 +08002675 struct net *net = sock_net(skb->sk);
2676 struct tipc_net *tn = net_generic(net, tipc_net_id);
Richard Alped6e164e2015-01-16 12:30:40 +01002677 u32 tbl_id = cb->args[0];
2678 u32 prev_portid = cb->args[1];
Richard Alpe34b78a122014-11-20 10:29:10 +01002679
Ying Xue07f6c4b2015-01-07 13:41:58 +08002680 rcu_read_lock();
Ying Xuee05b31f2015-01-09 15:27:08 +08002681 tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht);
Richard Alped6e164e2015-01-16 12:30:40 +01002682 for (; tbl_id < tbl->size; tbl_id++) {
2683 rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) {
Ying Xue07f6c4b2015-01-07 13:41:58 +08002684 spin_lock_bh(&tsk->sk.sk_lock.slock);
Richard Alped6e164e2015-01-16 12:30:40 +01002685 if (prev_portid && prev_portid != tsk->portid) {
2686 spin_unlock_bh(&tsk->sk.sk_lock.slock);
2687 continue;
2688 }
Richard Alpe34b78a122014-11-20 10:29:10 +01002689
Richard Alped6e164e2015-01-16 12:30:40 +01002690 err = __tipc_nl_add_sk(skb, cb, tsk);
2691 if (err) {
2692 prev_portid = tsk->portid;
2693 spin_unlock_bh(&tsk->sk.sk_lock.slock);
2694 goto out;
2695 }
2696 prev_portid = 0;
2697 spin_unlock_bh(&tsk->sk.sk_lock.slock);
Ying Xue07f6c4b2015-01-07 13:41:58 +08002698 }
Richard Alpe34b78a122014-11-20 10:29:10 +01002699 }
Richard Alped6e164e2015-01-16 12:30:40 +01002700out:
Ying Xue07f6c4b2015-01-07 13:41:58 +08002701 rcu_read_unlock();
Richard Alped6e164e2015-01-16 12:30:40 +01002702 cb->args[0] = tbl_id;
2703 cb->args[1] = prev_portid;
Richard Alpe34b78a122014-11-20 10:29:10 +01002704
2705 return skb->len;
2706}
Richard Alpe1a1a1432014-11-20 10:29:11 +01002707
2708/* Caller should hold socket lock for the passed tipc socket. */
Richard Alped8182802014-11-24 11:10:29 +01002709static int __tipc_nl_add_sk_publ(struct sk_buff *skb,
2710 struct netlink_callback *cb,
2711 struct publication *publ)
Richard Alpe1a1a1432014-11-20 10:29:11 +01002712{
2713 void *hdr;
2714 struct nlattr *attrs;
2715
2716 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
Richard Alpebfb3e5d2015-02-09 09:50:03 +01002717 &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET);
Richard Alpe1a1a1432014-11-20 10:29:11 +01002718 if (!hdr)
2719 goto msg_cancel;
2720
2721 attrs = nla_nest_start(skb, TIPC_NLA_PUBL);
2722 if (!attrs)
2723 goto genlmsg_cancel;
2724
2725 if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key))
2726 goto attr_msg_cancel;
2727 if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type))
2728 goto attr_msg_cancel;
2729 if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower))
2730 goto attr_msg_cancel;
2731 if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper))
2732 goto attr_msg_cancel;
2733
2734 nla_nest_end(skb, attrs);
2735 genlmsg_end(skb, hdr);
2736
2737 return 0;
2738
2739attr_msg_cancel:
2740 nla_nest_cancel(skb, attrs);
2741genlmsg_cancel:
2742 genlmsg_cancel(skb, hdr);
2743msg_cancel:
2744 return -EMSGSIZE;
2745}
2746
2747/* Caller should hold socket lock for the passed tipc socket. */
Richard Alped8182802014-11-24 11:10:29 +01002748static int __tipc_nl_list_sk_publ(struct sk_buff *skb,
2749 struct netlink_callback *cb,
2750 struct tipc_sock *tsk, u32 *last_publ)
Richard Alpe1a1a1432014-11-20 10:29:11 +01002751{
2752 int err;
2753 struct publication *p;
2754
2755 if (*last_publ) {
2756 list_for_each_entry(p, &tsk->publications, pport_list) {
2757 if (p->key == *last_publ)
2758 break;
2759 }
2760 if (p->key != *last_publ) {
2761 /* We never set seq or call nl_dump_check_consistent()
2762 * this means that setting prev_seq here will cause the
2763 * consistence check to fail in the netlink callback
2764 * handler. Resulting in the last NLMSG_DONE message
2765 * having the NLM_F_DUMP_INTR flag set.
2766 */
2767 cb->prev_seq = 1;
2768 *last_publ = 0;
2769 return -EPIPE;
2770 }
2771 } else {
2772 p = list_first_entry(&tsk->publications, struct publication,
2773 pport_list);
2774 }
2775
2776 list_for_each_entry_from(p, &tsk->publications, pport_list) {
2777 err = __tipc_nl_add_sk_publ(skb, cb, p);
2778 if (err) {
2779 *last_publ = p->key;
2780 return err;
2781 }
2782 }
2783 *last_publ = 0;
2784
2785 return 0;
2786}
2787
2788int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb)
2789{
2790 int err;
Ying Xue07f6c4b2015-01-07 13:41:58 +08002791 u32 tsk_portid = cb->args[0];
Richard Alpe1a1a1432014-11-20 10:29:11 +01002792 u32 last_publ = cb->args[1];
2793 u32 done = cb->args[2];
Ying Xuee05b31f2015-01-09 15:27:08 +08002794 struct net *net = sock_net(skb->sk);
Richard Alpe1a1a1432014-11-20 10:29:11 +01002795 struct tipc_sock *tsk;
2796
Ying Xue07f6c4b2015-01-07 13:41:58 +08002797 if (!tsk_portid) {
Richard Alpe1a1a1432014-11-20 10:29:11 +01002798 struct nlattr **attrs;
2799 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
2800
2801 err = tipc_nlmsg_parse(cb->nlh, &attrs);
2802 if (err)
2803 return err;
2804
2805 err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX,
2806 attrs[TIPC_NLA_SOCK],
2807 tipc_nl_sock_policy);
2808 if (err)
2809 return err;
2810
2811 if (!sock[TIPC_NLA_SOCK_REF])
2812 return -EINVAL;
2813
Ying Xue07f6c4b2015-01-07 13:41:58 +08002814 tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
Richard Alpe1a1a1432014-11-20 10:29:11 +01002815 }
2816
2817 if (done)
2818 return 0;
2819
Ying Xuee05b31f2015-01-09 15:27:08 +08002820 tsk = tipc_sk_lookup(net, tsk_portid);
Richard Alpe1a1a1432014-11-20 10:29:11 +01002821 if (!tsk)
2822 return -EINVAL;
2823
2824 lock_sock(&tsk->sk);
2825 err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ);
2826 if (!err)
2827 done = 1;
2828 release_sock(&tsk->sk);
Ying Xue07f6c4b2015-01-07 13:41:58 +08002829 sock_put(&tsk->sk);
Richard Alpe1a1a1432014-11-20 10:29:11 +01002830
Ying Xue07f6c4b2015-01-07 13:41:58 +08002831 cb->args[0] = tsk_portid;
Richard Alpe1a1a1432014-11-20 10:29:11 +01002832 cb->args[1] = last_publ;
2833 cb->args[2] = done;
2834
2835 return skb->len;
2836}