Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
Jon Paul Maloy | 02c00c2 | 2014-06-09 11:08:18 -0500 | [diff] [blame] | 2 | * net/tipc/socket.c: TIPC socket API |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Jon Paul Maloy | 3c724ac | 2015-02-05 08:36:43 -0500 | [diff] [blame] | 4 | * Copyright (c) 2001-2007, 2012-2015, Ericsson AB |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 5 | * Copyright (c) 2004-2008, 2010-2013, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 6 | * All rights reserved. |
| 7 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 8 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the names of the copyright holders nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 19 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 20 | * Alternatively, this software may be distributed under the terms of the |
| 21 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 22 | * Software Foundation. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 37 | #include <linux/rhashtable.h> |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 38 | #include "core.h" |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 39 | #include "name_table.h" |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 40 | #include "node.h" |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 41 | #include "link.h" |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 42 | #include "name_distr.h" |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 43 | #include "socket.h" |
Jon Paul Maloy | a6bf70f | 2015-05-14 10:46:13 -0400 | [diff] [blame] | 44 | #include "bcast.h" |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 45 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 46 | #define SS_LISTENING -1 /* socket is listening */ |
| 47 | #define SS_READY -2 /* socket is connectionless */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 48 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 49 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 50 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 51 | #define TIPC_FWD_MSG 1 |
| 52 | #define TIPC_CONN_OK 0 |
| 53 | #define TIPC_CONN_PROBING 1 |
| 54 | #define TIPC_MAX_PORT 0xffffffff |
| 55 | #define TIPC_MIN_PORT 1 |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 56 | |
| 57 | /** |
| 58 | * struct tipc_sock - TIPC socket structure |
| 59 | * @sk: socket - interacts with 'port' and with user via the socket API |
| 60 | * @connected: non-zero if port is currently connected to a peer port |
| 61 | * @conn_type: TIPC type used when connection was established |
| 62 | * @conn_instance: TIPC instance used when connection was established |
| 63 | * @published: non-zero if port has one or more associated names |
| 64 | * @max_pkt: maximum packet size "hint" used when building messages sent by port |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 65 | * @portid: unique port identity in TIPC socket hash table |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 66 | * @phdr: preformatted message header used when sending messages |
| 67 | * @port_list: adjacent ports in TIPC's global list of ports |
| 68 | * @publications: list of publications for port |
| 69 | * @pub_count: total # of publications port has made during its lifetime |
| 70 | * @probing_state: |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 71 | * @probing_intv: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 72 | * @conn_timeout: the time we can wait for an unresponded setup request |
| 73 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue |
| 74 | * @link_cong: non-zero if owner must sleep because of link congestion |
| 75 | * @sent_unacked: # messages sent by socket, and not yet acked by peer |
| 76 | * @rcv_unacked: # messages read by user, but not yet acked back to peer |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 77 | * @remote: 'connected' peer for dgram/rdm |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 78 | * @node: hash table node |
| 79 | * @rcu: rcu struct for tipc_sock |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 80 | */ |
| 81 | struct tipc_sock { |
| 82 | struct sock sk; |
| 83 | int connected; |
| 84 | u32 conn_type; |
| 85 | u32 conn_instance; |
| 86 | int published; |
| 87 | u32 max_pkt; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 88 | u32 portid; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 89 | struct tipc_msg phdr; |
| 90 | struct list_head sock_list; |
| 91 | struct list_head publications; |
| 92 | u32 pub_count; |
| 93 | u32 probing_state; |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 94 | unsigned long probing_intv; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 95 | uint conn_timeout; |
| 96 | atomic_t dupl_rcvcnt; |
| 97 | bool link_cong; |
| 98 | uint sent_unacked; |
| 99 | uint rcv_unacked; |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 100 | struct sockaddr_tipc remote; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 101 | struct rhash_head node; |
| 102 | struct rcu_head rcu; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 103 | }; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 104 | |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 105 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 106 | static void tipc_data_ready(struct sock *sk); |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 107 | static void tipc_write_space(struct sock *sk); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 108 | static int tipc_release(struct socket *sock); |
| 109 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 110 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 111 | static void tipc_sk_timeout(unsigned long data); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 112 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 113 | struct tipc_name_seq const *seq); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 114 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 115 | struct tipc_name_seq const *seq); |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 116 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 117 | static int tipc_sk_insert(struct tipc_sock *tsk); |
| 118 | static void tipc_sk_remove(struct tipc_sock *tsk); |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 119 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, |
| 120 | size_t dsz); |
| 121 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 122 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 123 | static const struct proto_ops packet_ops; |
| 124 | static const struct proto_ops stream_ops; |
| 125 | static const struct proto_ops msg_ops; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 126 | static struct proto tipc_proto; |
| 127 | |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 128 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
| 129 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, |
| 130 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, |
| 131 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, |
| 132 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, |
| 133 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } |
| 134 | }; |
| 135 | |
Herbert Xu | 6cca7289 | 2015-03-20 21:57:05 +1100 | [diff] [blame] | 136 | static const struct rhashtable_params tsk_rht_params; |
| 137 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 138 | /* |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 139 | * Revised TIPC socket locking policy: |
| 140 | * |
| 141 | * Most socket operations take the standard socket lock when they start |
| 142 | * and hold it until they finish (or until they need to sleep). Acquiring |
| 143 | * this lock grants the owner exclusive access to the fields of the socket |
| 144 | * data structures, with the exception of the backlog queue. A few socket |
| 145 | * operations can be done without taking the socket lock because they only |
| 146 | * read socket information that never changes during the life of the socket. |
| 147 | * |
| 148 | * Socket operations may acquire the lock for the associated TIPC port if they |
| 149 | * need to perform an operation on the port. If any routine needs to acquire |
| 150 | * both the socket lock and the port lock it must take the socket lock first |
| 151 | * to avoid the risk of deadlock. |
| 152 | * |
| 153 | * The dispatcher handling incoming messages cannot grab the socket lock in |
| 154 | * the standard fashion, since invoked it runs at the BH level and cannot block. |
| 155 | * Instead, it checks to see if the socket lock is currently owned by someone, |
| 156 | * and either handles the message itself or adds it to the socket's backlog |
| 157 | * queue; in the latter case the queued message is processed once the process |
| 158 | * owning the socket lock releases it. |
| 159 | * |
| 160 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes |
| 161 | * the problem of a blocked socket operation preventing any other operations |
| 162 | * from occurring. However, applications must be careful if they have |
| 163 | * multiple threads trying to send (or receive) on the same socket, as these |
| 164 | * operations might interfere with each other. For example, doing a connect |
| 165 | * and a receive at the same time might allow the receive to consume the |
| 166 | * ACK message meant for the connect. While additional work could be done |
| 167 | * to try and overcome this, it doesn't seem to be worthwhile at the present. |
| 168 | * |
| 169 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures |
| 170 | * that another operation that must be performed in a non-blocking manner is |
| 171 | * not delayed for very long because the lock has already been taken. |
| 172 | * |
| 173 | * NOTE: This code assumes that certain fields of a port/socket pair are |
| 174 | * constant over its lifetime; such fields can be examined without taking |
| 175 | * the socket lock and/or port lock, and do not need to be re-read even |
| 176 | * after resuming processing after waiting. These fields include: |
| 177 | * - socket type |
| 178 | * - pointer to socket sk structure (aka tipc_sock structure) |
| 179 | * - pointer to port structure |
| 180 | * - port reference |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 181 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 182 | |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 183 | static u32 tsk_own_node(struct tipc_sock *tsk) |
| 184 | { |
| 185 | return msg_prevnode(&tsk->phdr); |
| 186 | } |
| 187 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 188 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 189 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 190 | return msg_destnode(&tsk->phdr); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 191 | } |
| 192 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 193 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 194 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 195 | return msg_destport(&tsk->phdr); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 196 | } |
| 197 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 198 | static bool tsk_unreliable(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 199 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 200 | return msg_src_droppable(&tsk->phdr) != 0; |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 201 | } |
| 202 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 203 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 204 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 205 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 206 | } |
| 207 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 208 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 209 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 210 | return msg_dest_droppable(&tsk->phdr) != 0; |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 211 | } |
| 212 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 213 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 214 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 215 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 216 | } |
| 217 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 218 | static int tsk_importance(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 219 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 220 | return msg_importance(&tsk->phdr); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 221 | } |
| 222 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 223 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 224 | { |
| 225 | if (imp > TIPC_CRITICAL_IMPORTANCE) |
| 226 | return -EINVAL; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 227 | msg_set_importance(&tsk->phdr, (u32)imp); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 228 | return 0; |
| 229 | } |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 230 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 231 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
| 232 | { |
| 233 | return container_of(sk, struct tipc_sock, sk); |
| 234 | } |
| 235 | |
| 236 | static int tsk_conn_cong(struct tipc_sock *tsk) |
| 237 | { |
| 238 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; |
| 239 | } |
| 240 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 241 | /** |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 242 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 243 | * |
| 244 | * Caller must hold socket lock |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 245 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 246 | static void tsk_advance_rx_queue(struct sock *sk) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 247 | { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 248 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 249 | } |
| 250 | |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 251 | /* tipc_sk_respond() : send response message back to sender |
| 252 | */ |
| 253 | static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err) |
| 254 | { |
| 255 | u32 selector; |
| 256 | u32 dnode; |
| 257 | u32 onode = tipc_own_addr(sock_net(sk)); |
| 258 | |
| 259 | if (!tipc_msg_reverse(onode, &skb, err)) |
| 260 | return; |
| 261 | |
| 262 | dnode = msg_destnode(buf_msg(skb)); |
| 263 | selector = msg_origport(buf_msg(skb)); |
| 264 | tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector); |
| 265 | } |
| 266 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 267 | /** |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 268 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 269 | * |
| 270 | * Caller must hold socket lock |
| 271 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 272 | static void tsk_rej_rx_queue(struct sock *sk) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 273 | { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 274 | struct sk_buff *skb; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 275 | |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 276 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) |
| 277 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 278 | } |
| 279 | |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 280 | /* tsk_peer_msg - verify if message was sent by connected port's peer |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 281 | * |
| 282 | * Handles cases where the node's network address has changed from |
| 283 | * the default of <0.0.0> to its configured setting. |
| 284 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 285 | static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 286 | { |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 287 | struct tipc_net *tn = net_generic(sock_net(&tsk->sk), tipc_net_id); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 288 | u32 peer_port = tsk_peer_port(tsk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 289 | u32 orig_node; |
| 290 | u32 peer_node; |
| 291 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 292 | if (unlikely(!tsk->connected)) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 293 | return false; |
| 294 | |
| 295 | if (unlikely(msg_origport(msg) != peer_port)) |
| 296 | return false; |
| 297 | |
| 298 | orig_node = msg_orignode(msg); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 299 | peer_node = tsk_peer_node(tsk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 300 | |
| 301 | if (likely(orig_node == peer_node)) |
| 302 | return true; |
| 303 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 304 | if (!orig_node && (peer_node == tn->own_addr)) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 305 | return true; |
| 306 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 307 | if (!peer_node && (orig_node == tn->own_addr)) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 308 | return true; |
| 309 | |
| 310 | return false; |
| 311 | } |
| 312 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 313 | /** |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 314 | * tipc_sk_create - create a TIPC socket |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 315 | * @net: network namespace (must be default network) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 316 | * @sock: pre-allocated socket structure |
| 317 | * @protocol: protocol indicator (must be 0) |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 318 | * @kern: caused by kernel or by userspace? |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 319 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 320 | * This routine creates additional data structures used by the TIPC socket, |
| 321 | * initializes them, and links them together. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 322 | * |
| 323 | * Returns 0 on success, errno otherwise |
| 324 | */ |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 325 | static int tipc_sk_create(struct net *net, struct socket *sock, |
| 326 | int protocol, int kern) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 327 | { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 328 | struct tipc_net *tn; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 329 | const struct proto_ops *ops; |
| 330 | socket_state state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 331 | struct sock *sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 332 | struct tipc_sock *tsk; |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 333 | struct tipc_msg *msg; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 334 | |
| 335 | /* Validate arguments */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 336 | if (unlikely(protocol != 0)) |
| 337 | return -EPROTONOSUPPORT; |
| 338 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 339 | switch (sock->type) { |
| 340 | case SOCK_STREAM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 341 | ops = &stream_ops; |
| 342 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 343 | break; |
| 344 | case SOCK_SEQPACKET: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 345 | ops = &packet_ops; |
| 346 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 347 | break; |
| 348 | case SOCK_DGRAM: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 349 | case SOCK_RDM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 350 | ops = &msg_ops; |
| 351 | state = SS_READY; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 352 | break; |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 353 | default: |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 354 | return -EPROTOTYPE; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 355 | } |
| 356 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 357 | /* Allocate socket's protocol area */ |
Eric W. Biederman | 11aa9c2 | 2015-05-08 21:09:13 -0500 | [diff] [blame] | 358 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 359 | if (sk == NULL) |
| 360 | return -ENOMEM; |
| 361 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 362 | tsk = tipc_sk(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 363 | tsk->max_pkt = MAX_PKT_DEFAULT; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 364 | INIT_LIST_HEAD(&tsk->publications); |
| 365 | msg = &tsk->phdr; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 366 | tn = net_generic(sock_net(sk), tipc_net_id); |
| 367 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 368 | NAMED_H_SIZE, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 369 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 370 | /* Finish initializing socket data structures */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 371 | sock->ops = ops; |
| 372 | sock->state = state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 373 | sock_init_data(sock, sk); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 374 | if (tipc_sk_insert(tsk)) { |
| 375 | pr_warn("Socket create failed; port numbrer exhausted\n"); |
| 376 | return -EINVAL; |
| 377 | } |
| 378 | msg_set_origport(msg, tsk->portid); |
Ying Xue | 3721e9c | 2015-01-13 17:07:48 +0800 | [diff] [blame] | 379 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 380 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 381 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 382 | sk->sk_data_ready = tipc_data_ready; |
| 383 | sk->sk_write_space = tipc_write_space; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 384 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 385 | tsk->sent_unacked = 0; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 386 | atomic_set(&tsk->dupl_rcvcnt, 0); |
Allan Stephens | 7ef43eb | 2008-05-12 15:42:28 -0700 | [diff] [blame] | 387 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 388 | if (sock->state == SS_READY) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 389 | tsk_set_unreturnable(tsk, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 390 | if (sock->type == SOCK_DGRAM) |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 391 | tsk_set_unreliable(tsk, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 392 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 393 | return 0; |
| 394 | } |
| 395 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 396 | static void tipc_sk_callback(struct rcu_head *head) |
| 397 | { |
| 398 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); |
| 399 | |
| 400 | sock_put(&tsk->sk); |
| 401 | } |
| 402 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 403 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 404 | * tipc_release - destroy a TIPC socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 405 | * @sock: socket to destroy |
| 406 | * |
| 407 | * This routine cleans up any messages that are still queued on the socket. |
| 408 | * For DGRAM and RDM socket types, all queued messages are rejected. |
| 409 | * For SEQPACKET and STREAM socket types, the first message is rejected |
| 410 | * and any others are discarded. (If the first message on a STREAM socket |
| 411 | * is partially-read, it is discarded and the next one is rejected instead.) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 412 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 413 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
| 414 | * are returned or discarded according to the "destination droppable" setting |
| 415 | * specified for the message by the sender. |
| 416 | * |
| 417 | * Returns 0 on success, errno otherwise |
| 418 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 419 | static int tipc_release(struct socket *sock) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 420 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 421 | struct sock *sk = sock->sk; |
Sasha Levin | 357c477 | 2015-01-13 12:46:41 -0500 | [diff] [blame] | 422 | struct net *net; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 423 | struct tipc_sock *tsk; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 424 | struct sk_buff *skb; |
Ying Xue | 1ea23a2 | 2015-05-28 13:19:22 +0800 | [diff] [blame] | 425 | u32 dnode; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 426 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 427 | /* |
| 428 | * Exit if socket isn't fully initialized (occurs when a failed accept() |
| 429 | * releases a pre-allocated child socket that was never used) |
| 430 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 431 | if (sk == NULL) |
| 432 | return 0; |
| 433 | |
Sasha Levin | 357c477 | 2015-01-13 12:46:41 -0500 | [diff] [blame] | 434 | net = sock_net(sk); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 435 | tsk = tipc_sk(sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 436 | lock_sock(sk); |
| 437 | |
| 438 | /* |
| 439 | * Reject all unreceived messages, except on an active connection |
| 440 | * (which disconnects locally & sends a 'FIN+' to peer) |
| 441 | */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 442 | dnode = tsk_peer_node(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 443 | while (sock->state != SS_DISCONNECTING) { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 444 | skb = __skb_dequeue(&sk->sk_receive_queue); |
| 445 | if (skb == NULL) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 446 | break; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 447 | if (TIPC_SKB_CB(skb)->handle != NULL) |
| 448 | kfree_skb(skb); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 449 | else { |
| 450 | if ((sock->state == SS_CONNECTING) || |
| 451 | (sock->state == SS_CONNECTED)) { |
| 452 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 453 | tsk->connected = 0; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 454 | tipc_node_remove_conn(net, dnode, tsk->portid); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 455 | } |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 456 | tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 457 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 458 | } |
| 459 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 460 | tipc_sk_withdraw(tsk, 0, NULL); |
Ying Xue | 1ea23a2 | 2015-05-28 13:19:22 +0800 | [diff] [blame] | 461 | sk_stop_timer(sk, &sk->sk_timer); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 462 | tipc_sk_remove(tsk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 463 | if (tsk->connected) { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 464 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 465 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 466 | tsk_own_node(tsk), tsk_peer_port(tsk), |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 467 | tsk->portid, TIPC_ERR_NO_PORT); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 468 | if (skb) |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 469 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 470 | tipc_node_remove_conn(net, dnode, tsk->portid); |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 471 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 472 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 473 | /* Discard any remaining (connection-based) messages in receive queue */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 474 | __skb_queue_purge(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 475 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 476 | /* Reject any messages that accumulated in backlog queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 477 | sock->state = SS_DISCONNECTING; |
| 478 | release_sock(sk); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 479 | |
| 480 | call_rcu(&tsk->rcu, tipc_sk_callback); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 481 | sock->sk = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 482 | |
Geert Uytterhoeven | 065d7e3 | 2014-04-06 15:56:14 +0200 | [diff] [blame] | 483 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 487 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 488 | * @sock: socket structure |
| 489 | * @uaddr: socket address describing name(s) and desired operation |
| 490 | * @uaddr_len: size of socket address data structure |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 491 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 492 | * Name and name sequence binding is indicated using a positive scope value; |
| 493 | * a negative scope value unbinds the specified name. Specifying no name |
| 494 | * (i.e. a socket address length of 0) unbinds all names from the socket. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 495 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 496 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 497 | * |
| 498 | * NOTE: This routine doesn't need to take the socket lock since it doesn't |
| 499 | * access any non-constant socket information. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 500 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 501 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
| 502 | int uaddr_len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 503 | { |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 504 | struct sock *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 505 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 506 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 507 | int res = -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 508 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 509 | lock_sock(sk); |
| 510 | if (unlikely(!uaddr_len)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 511 | res = tipc_sk_withdraw(tsk, 0, NULL); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 512 | goto exit; |
| 513 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 514 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 515 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
| 516 | res = -EINVAL; |
| 517 | goto exit; |
| 518 | } |
| 519 | if (addr->family != AF_TIPC) { |
| 520 | res = -EAFNOSUPPORT; |
| 521 | goto exit; |
| 522 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 523 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 524 | if (addr->addrtype == TIPC_ADDR_NAME) |
| 525 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 526 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
| 527 | res = -EAFNOSUPPORT; |
| 528 | goto exit; |
| 529 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 530 | |
Ying Xue | 13a2e89 | 2013-06-17 10:54:40 -0400 | [diff] [blame] | 531 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
Ying Xue | 7d0ab17 | 2013-06-17 10:54:41 -0400 | [diff] [blame] | 532 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 533 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
| 534 | res = -EACCES; |
| 535 | goto exit; |
| 536 | } |
Allan Stephens | c422f1b | 2011-11-02 15:49:40 -0400 | [diff] [blame] | 537 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 538 | res = (addr->scope > 0) ? |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 539 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
| 540 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 541 | exit: |
| 542 | release_sock(sk); |
| 543 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 544 | } |
| 545 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 546 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 547 | * tipc_getname - get port ID of socket or peer socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 548 | * @sock: socket structure |
| 549 | * @uaddr: area for returned socket address |
| 550 | * @uaddr_len: area for returned length of socket address |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 551 | * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 552 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 553 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 554 | * |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 555 | * NOTE: This routine doesn't need to take the socket lock since it only |
| 556 | * accesses socket information that is unchanging (or which changes in |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 557 | * a completely predictable manner). |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 558 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 559 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
| 560 | int *uaddr_len, int peer) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 561 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 562 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 563 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 564 | struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 565 | |
Kulikov Vasiliy | 88f8a5e | 2010-10-31 07:10:32 +0000 | [diff] [blame] | 566 | memset(addr, 0, sizeof(*addr)); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 567 | if (peer) { |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 568 | if ((sock->state != SS_CONNECTED) && |
| 569 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) |
| 570 | return -ENOTCONN; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 571 | addr->addr.id.ref = tsk_peer_port(tsk); |
| 572 | addr->addr.id.node = tsk_peer_node(tsk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 573 | } else { |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 574 | addr->addr.id.ref = tsk->portid; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 575 | addr->addr.id.node = tn->own_addr; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 576 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 577 | |
| 578 | *uaddr_len = sizeof(*addr); |
| 579 | addr->addrtype = TIPC_ADDR_ID; |
| 580 | addr->family = AF_TIPC; |
| 581 | addr->scope = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 582 | addr->addr.name.domain = 0; |
| 583 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 584 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 588 | * tipc_poll - read and possibly block on pollmask |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 589 | * @file: file structure associated with the socket |
| 590 | * @sock: socket for which to calculate the poll bits |
| 591 | * @wait: ??? |
| 592 | * |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 593 | * Returns pollmask value |
| 594 | * |
| 595 | * COMMENTARY: |
| 596 | * It appears that the usual socket locking mechanisms are not useful here |
| 597 | * since the pollmask info is potentially out-of-date the moment this routine |
| 598 | * exits. TCP and other protocols seem to rely on higher level poll routines |
| 599 | * to handle any preventable race conditions, so TIPC will do the same ... |
| 600 | * |
| 601 | * TIPC sets the returned events as follows: |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 602 | * |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 603 | * socket state flags set |
| 604 | * ------------ --------- |
| 605 | * unconnected no read flags |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 606 | * POLLOUT if port is not congested |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 607 | * |
| 608 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue |
| 609 | * no write flags |
| 610 | * |
| 611 | * connected POLLIN/POLLRDNORM if data in rx queue |
| 612 | * POLLOUT if port is not congested |
| 613 | * |
| 614 | * disconnecting POLLIN/POLLRDNORM/POLLHUP |
| 615 | * no write flags |
| 616 | * |
| 617 | * listening POLLIN if SYN in rx queue |
| 618 | * no write flags |
| 619 | * |
| 620 | * ready POLLIN/POLLRDNORM if data in rx queue |
| 621 | * [connectionless] POLLOUT (since port cannot be congested) |
| 622 | * |
| 623 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
| 624 | * imply that the operation will succeed, merely that it should be performed |
| 625 | * and will not block. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 626 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 627 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
| 628 | poll_table *wait) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 629 | { |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 630 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 631 | struct tipc_sock *tsk = tipc_sk(sk); |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 632 | u32 mask = 0; |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 633 | |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 634 | sock_poll_wait(file, sk_sleep(sk), wait); |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 635 | |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 636 | switch ((int)sock->state) { |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 637 | case SS_UNCONNECTED: |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 638 | if (!tsk->link_cong) |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 639 | mask |= POLLOUT; |
| 640 | break; |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 641 | case SS_READY: |
| 642 | case SS_CONNECTED: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 643 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 644 | mask |= POLLOUT; |
| 645 | /* fall thru' */ |
| 646 | case SS_CONNECTING: |
| 647 | case SS_LISTENING: |
| 648 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 649 | mask |= (POLLIN | POLLRDNORM); |
| 650 | break; |
| 651 | case SS_DISCONNECTING: |
| 652 | mask = (POLLIN | POLLRDNORM | POLLHUP); |
| 653 | break; |
| 654 | } |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 655 | |
| 656 | return mask; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 657 | } |
| 658 | |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 659 | /** |
| 660 | * tipc_sendmcast - send multicast message |
| 661 | * @sock: socket structure |
| 662 | * @seq: destination address |
Al Viro | 562640f | 2014-11-15 01:13:43 -0500 | [diff] [blame] | 663 | * @msg: message to send |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 664 | * @dsz: total length of message data |
| 665 | * @timeo: timeout to wait for wakeup |
| 666 | * |
| 667 | * Called from function tipc_sendmsg(), which has done all sanity checks |
| 668 | * Returns the number of bytes sent on success, or errno |
| 669 | */ |
| 670 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, |
Al Viro | 562640f | 2014-11-15 01:13:43 -0500 | [diff] [blame] | 671 | struct msghdr *msg, size_t dsz, long timeo) |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 672 | { |
| 673 | struct sock *sk = sock->sk; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 674 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 675 | struct net *net = sock_net(sk); |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 676 | struct tipc_msg *mhdr = &tsk->phdr; |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 677 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 678 | struct iov_iter save = msg->msg_iter; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 679 | uint mtu; |
| 680 | int rc; |
| 681 | |
| 682 | msg_set_type(mhdr, TIPC_MCAST_MSG); |
| 683 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); |
| 684 | msg_set_destport(mhdr, 0); |
| 685 | msg_set_destnode(mhdr, 0); |
| 686 | msg_set_nametype(mhdr, seq->type); |
| 687 | msg_set_namelower(mhdr, seq->lower); |
| 688 | msg_set_nameupper(mhdr, seq->upper); |
| 689 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); |
| 690 | |
| 691 | new_mtu: |
Jon Paul Maloy | 959e178 | 2015-10-22 08:51:43 -0400 | [diff] [blame] | 692 | mtu = tipc_bcast_get_mtu(net); |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 693 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, pktchain); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 694 | if (unlikely(rc < 0)) |
| 695 | return rc; |
| 696 | |
| 697 | do { |
Jon Paul Maloy | 6beb19a | 2015-10-22 08:51:33 -0400 | [diff] [blame] | 698 | rc = tipc_bcast_xmit(net, pktchain); |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 699 | if (likely(!rc)) |
| 700 | return dsz; |
| 701 | |
| 702 | if (rc == -ELINKCONG) { |
| 703 | tsk->link_cong = 1; |
| 704 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
| 705 | if (!rc) |
| 706 | continue; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 707 | } |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 708 | __skb_queue_purge(pktchain); |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 709 | if (rc == -EMSGSIZE) { |
| 710 | msg->msg_iter = save; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 711 | goto new_mtu; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 712 | } |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 713 | break; |
| 714 | } while (1); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 715 | return rc; |
| 716 | } |
| 717 | |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 718 | /** |
| 719 | * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets |
| 720 | * @arrvq: queue with arriving messages, to be cloned after destination lookup |
| 721 | * @inputq: queue with cloned messages, delivered to socket after dest lookup |
| 722 | * |
| 723 | * Multi-threaded: parallel calls with reference to same queues may occur |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 724 | */ |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 725 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq, |
| 726 | struct sk_buff_head *inputq) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 727 | { |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 728 | struct tipc_msg *msg; |
Jon Paul Maloy | 3c724ac | 2015-02-05 08:36:43 -0500 | [diff] [blame] | 729 | struct tipc_plist dports; |
Jon Paul Maloy | 3c724ac | 2015-02-05 08:36:43 -0500 | [diff] [blame] | 730 | u32 portid; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 731 | u32 scope = TIPC_CLUSTER_SCOPE; |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 732 | struct sk_buff_head tmpq; |
| 733 | uint hsz; |
| 734 | struct sk_buff *skb, *_skb; |
Jon Paul Maloy | 3c724ac | 2015-02-05 08:36:43 -0500 | [diff] [blame] | 735 | |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 736 | __skb_queue_head_init(&tmpq); |
Jon Paul Maloy | 3c724ac | 2015-02-05 08:36:43 -0500 | [diff] [blame] | 737 | tipc_plist_init(&dports); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 738 | |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 739 | skb = tipc_skb_peek(arrvq, &inputq->lock); |
| 740 | for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) { |
| 741 | msg = buf_msg(skb); |
| 742 | hsz = skb_headroom(skb) + msg_hdr_sz(msg); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 743 | |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 744 | if (in_own_node(net, msg_orignode(msg))) |
| 745 | scope = TIPC_NODE_SCOPE; |
| 746 | |
| 747 | /* Create destination port list and message clones: */ |
| 748 | tipc_nametbl_mc_translate(net, |
| 749 | msg_nametype(msg), msg_namelower(msg), |
| 750 | msg_nameupper(msg), scope, &dports); |
| 751 | portid = tipc_plist_pop(&dports); |
| 752 | for (; portid; portid = tipc_plist_pop(&dports)) { |
| 753 | _skb = __pskb_copy(skb, hsz, GFP_ATOMIC); |
| 754 | if (_skb) { |
| 755 | msg_set_destport(buf_msg(_skb), portid); |
| 756 | __skb_queue_tail(&tmpq, _skb); |
| 757 | continue; |
| 758 | } |
| 759 | pr_warn("Failed to clone mcast rcv buffer\n"); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 760 | } |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 761 | /* Append to inputq if not already done by other thread */ |
| 762 | spin_lock_bh(&inputq->lock); |
| 763 | if (skb_peek(arrvq) == skb) { |
| 764 | skb_queue_splice_tail_init(&tmpq, inputq); |
| 765 | kfree_skb(__skb_dequeue(arrvq)); |
| 766 | } |
| 767 | spin_unlock_bh(&inputq->lock); |
| 768 | __skb_queue_purge(&tmpq); |
| 769 | kfree_skb(skb); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 770 | } |
Jon Paul Maloy | cb1b728 | 2015-02-05 08:36:44 -0500 | [diff] [blame] | 771 | tipc_sk_rcv(net, inputq); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 772 | } |
| 773 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 774 | /** |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 775 | * tipc_sk_proto_rcv - receive a connection mng protocol message |
| 776 | * @tsk: receiving socket |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 777 | * @skb: pointer to message buffer. |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 778 | */ |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 779 | static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb) |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 780 | { |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 781 | struct sock *sk = &tsk->sk; |
| 782 | struct tipc_msg *hdr = buf_msg(skb); |
| 783 | int mtyp = msg_type(hdr); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 784 | int conn_cong; |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 785 | |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 786 | /* Ignore if connection cannot be validated: */ |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 787 | if (!tsk_peer_msg(tsk, hdr)) |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 788 | goto exit; |
| 789 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 790 | tsk->probing_state = TIPC_CONN_OK; |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 791 | |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 792 | if (mtyp == CONN_PROBE) { |
| 793 | msg_set_type(hdr, CONN_PROBE_REPLY); |
| 794 | tipc_sk_respond(sk, skb, TIPC_OK); |
| 795 | return; |
| 796 | } else if (mtyp == CONN_ACK) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 797 | conn_cong = tsk_conn_cong(tsk); |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 798 | tsk->sent_unacked -= msg_msgcnt(hdr); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 799 | if (conn_cong) |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 800 | sk->sk_write_space(sk); |
| 801 | } else if (mtyp != CONN_PROBE_REPLY) { |
| 802 | pr_warn("Received unknown CONN_PROTO msg\n"); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 803 | } |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 804 | exit: |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 805 | kfree_skb(skb); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 806 | } |
| 807 | |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 808 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
| 809 | { |
| 810 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 811 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 812 | DEFINE_WAIT(wait); |
| 813 | int done; |
| 814 | |
| 815 | do { |
| 816 | int err = sock_error(sk); |
| 817 | if (err) |
| 818 | return err; |
| 819 | if (sock->state == SS_DISCONNECTING) |
| 820 | return -EPIPE; |
| 821 | if (!*timeo_p) |
| 822 | return -EAGAIN; |
| 823 | if (signal_pending(current)) |
| 824 | return sock_intr_errno(*timeo_p); |
| 825 | |
| 826 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 827 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 828 | finish_wait(sk_sleep(sk), &wait); |
| 829 | } while (!done); |
| 830 | return 0; |
| 831 | } |
| 832 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 833 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 834 | * tipc_sendmsg - send message in connectionless manner |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 835 | * @sock: socket structure |
| 836 | * @m: message to send |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 837 | * @dsz: amount of user data to be sent |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 838 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 839 | * Message must have an destination specified explicitly. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 840 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 841 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
| 842 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 843 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 844 | * Returns the number of bytes sent on success, or errno otherwise |
| 845 | */ |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 846 | static int tipc_sendmsg(struct socket *sock, |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 847 | struct msghdr *m, size_t dsz) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 848 | { |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 849 | struct sock *sk = sock->sk; |
| 850 | int ret; |
| 851 | |
| 852 | lock_sock(sk); |
| 853 | ret = __tipc_sendmsg(sock, m, dsz); |
| 854 | release_sock(sk); |
| 855 | |
| 856 | return ret; |
| 857 | } |
| 858 | |
| 859 | static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz) |
| 860 | { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 861 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 862 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 863 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 864 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 865 | struct tipc_msg *mhdr = &tsk->phdr; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 866 | u32 dnode, dport; |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 867 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 868 | struct sk_buff *skb; |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 869 | struct tipc_name_seq *seq; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 870 | struct iov_iter save; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 871 | u32 mtu; |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 872 | long timeo; |
Erik Hugne | 88b17b6 | 2014-12-03 14:44:44 +0100 | [diff] [blame] | 873 | int rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 874 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 875 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
Allan Stephens | c29c3f7 | 2010-04-20 17:58:24 -0400 | [diff] [blame] | 876 | return -EMSGSIZE; |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 877 | if (unlikely(!dest)) { |
| 878 | if (tsk->connected && sock->state == SS_READY) |
| 879 | dest = &tsk->remote; |
| 880 | else |
| 881 | return -EDESTADDRREQ; |
| 882 | } else if (unlikely(m->msg_namelen < sizeof(*dest)) || |
| 883 | dest->family != AF_TIPC) { |
| 884 | return -EINVAL; |
| 885 | } |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 886 | if (unlikely(sock->state != SS_READY)) { |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 887 | if (sock->state == SS_LISTENING) |
| 888 | return -EPIPE; |
| 889 | if (sock->state != SS_UNCONNECTED) |
| 890 | return -EISCONN; |
| 891 | if (tsk->published) |
| 892 | return -EOPNOTSUPP; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 893 | if (dest->addrtype == TIPC_ADDR_NAME) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 894 | tsk->conn_type = dest->addr.name.name.type; |
| 895 | tsk->conn_instance = dest->addr.name.name.instance; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 896 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 897 | } |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 898 | seq = &dest->addr.nameseq; |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 899 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 900 | |
| 901 | if (dest->addrtype == TIPC_ADDR_MCAST) { |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 902 | return tipc_sendmcast(sock, seq, m, dsz, timeo); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 903 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
| 904 | u32 type = dest->addr.name.name.type; |
| 905 | u32 inst = dest->addr.name.name.instance; |
| 906 | u32 domain = dest->addr.name.domain; |
| 907 | |
| 908 | dnode = domain; |
| 909 | msg_set_type(mhdr, TIPC_NAMED_MSG); |
| 910 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); |
| 911 | msg_set_nametype(mhdr, type); |
| 912 | msg_set_nameinst(mhdr, inst); |
| 913 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame] | 914 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 915 | msg_set_destnode(mhdr, dnode); |
| 916 | msg_set_destport(mhdr, dport); |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 917 | if (unlikely(!dport && !dnode)) |
| 918 | return -EHOSTUNREACH; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 919 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
| 920 | dnode = dest->addr.id.node; |
| 921 | msg_set_type(mhdr, TIPC_DIRECT_MSG); |
| 922 | msg_set_lookup_scope(mhdr, 0); |
| 923 | msg_set_destnode(mhdr, dnode); |
| 924 | msg_set_destport(mhdr, dest->addr.id.ref); |
| 925 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); |
| 926 | } |
| 927 | |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 928 | save = m->msg_iter; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 929 | new_mtu: |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 930 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 931 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, pktchain); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 932 | if (rc < 0) |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 933 | return rc; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 934 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 935 | do { |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 936 | skb = skb_peek(pktchain); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 937 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 938 | rc = tipc_node_xmit(net, pktchain, dnode, tsk->portid); |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 939 | if (likely(!rc)) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 940 | if (sock->state != SS_READY) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 941 | sock->state = SS_CONNECTING; |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 942 | return dsz; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 943 | } |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 944 | if (rc == -ELINKCONG) { |
| 945 | tsk->link_cong = 1; |
| 946 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
| 947 | if (!rc) |
| 948 | continue; |
| 949 | } |
| 950 | __skb_queue_purge(pktchain); |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 951 | if (rc == -EMSGSIZE) { |
| 952 | m->msg_iter = save; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 953 | goto new_mtu; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 954 | } |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 955 | break; |
| 956 | } while (1); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 957 | |
| 958 | return rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 959 | } |
| 960 | |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 961 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
| 962 | { |
| 963 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 964 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 965 | DEFINE_WAIT(wait); |
| 966 | int done; |
| 967 | |
| 968 | do { |
| 969 | int err = sock_error(sk); |
| 970 | if (err) |
| 971 | return err; |
| 972 | if (sock->state == SS_DISCONNECTING) |
| 973 | return -EPIPE; |
| 974 | else if (sock->state != SS_CONNECTED) |
| 975 | return -ENOTCONN; |
| 976 | if (!*timeo_p) |
| 977 | return -EAGAIN; |
| 978 | if (signal_pending(current)) |
| 979 | return sock_intr_errno(*timeo_p); |
| 980 | |
| 981 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
| 982 | done = sk_wait_event(sk, timeo_p, |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 983 | (!tsk->link_cong && |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 984 | !tsk_conn_cong(tsk)) || |
| 985 | !tsk->connected); |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 986 | finish_wait(sk_sleep(sk), &wait); |
| 987 | } while (!done); |
| 988 | return 0; |
| 989 | } |
| 990 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 991 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 992 | * tipc_send_stream - send stream-oriented data |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 993 | * @sock: socket structure |
| 994 | * @m: data to send |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 995 | * @dsz: total length of data to be transmitted |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 996 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 997 | * Used for SOCK_STREAM data. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 998 | * |
| 999 | * Returns the number of bytes sent on success (or partial success), |
Allan Stephens | 1303e8f | 2006-06-25 23:46:50 -0700 | [diff] [blame] | 1000 | * or errno if no data sent |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1001 | */ |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 1002 | static int tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1003 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1004 | struct sock *sk = sock->sk; |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 1005 | int ret; |
| 1006 | |
| 1007 | lock_sock(sk); |
| 1008 | ret = __tipc_send_stream(sock, m, dsz); |
| 1009 | release_sock(sk); |
| 1010 | |
| 1011 | return ret; |
| 1012 | } |
| 1013 | |
| 1014 | static int __tipc_send_stream(struct socket *sock, struct msghdr *m, size_t dsz) |
| 1015 | { |
| 1016 | struct sock *sk = sock->sk; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1017 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1018 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1019 | struct tipc_msg *mhdr = &tsk->phdr; |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 1020 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1021 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 1022 | u32 portid = tsk->portid; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1023 | int rc = -EINVAL; |
| 1024 | long timeo; |
| 1025 | u32 dnode; |
| 1026 | uint mtu, send, sent = 0; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 1027 | struct iov_iter save; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1028 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1029 | /* Handle implied connection establishment */ |
| 1030 | if (unlikely(dest)) { |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 1031 | rc = __tipc_sendmsg(sock, m, dsz); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1032 | if (dsz && (dsz == rc)) |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1033 | tsk->sent_unacked = 1; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1034 | return rc; |
| 1035 | } |
| 1036 | if (dsz > (uint)INT_MAX) |
| 1037 | return -EMSGSIZE; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1038 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1039 | if (unlikely(sock->state != SS_CONNECTED)) { |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1040 | if (sock->state == SS_DISCONNECTING) |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 1041 | return -EPIPE; |
wangweidong | b055597 | 2013-12-27 10:09:39 +0800 | [diff] [blame] | 1042 | else |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 1043 | return -ENOTCONN; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1044 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1045 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1046 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1047 | dnode = tsk_peer_node(tsk); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1048 | |
| 1049 | next: |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 1050 | save = m->msg_iter; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1051 | mtu = tsk->max_pkt; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1052 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 1053 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, pktchain); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1054 | if (unlikely(rc < 0)) |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 1055 | return rc; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1056 | do { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1057 | if (likely(!tsk_conn_cong(tsk))) { |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 1058 | rc = tipc_node_xmit(net, pktchain, dnode, portid); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1059 | if (likely(!rc)) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1060 | tsk->sent_unacked++; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1061 | sent += send; |
| 1062 | if (sent == dsz) |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 1063 | return dsz; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1064 | goto next; |
Allan Stephens | 1303e8f | 2006-06-25 23:46:50 -0700 | [diff] [blame] | 1065 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1066 | if (rc == -EMSGSIZE) { |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 1067 | __skb_queue_purge(pktchain); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1068 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
| 1069 | portid); |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 1070 | m->msg_iter = save; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1071 | goto next; |
| 1072 | } |
| 1073 | if (rc != -ELINKCONG) |
| 1074 | break; |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 1075 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1076 | tsk->link_cong = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1077 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1078 | rc = tipc_wait_for_sndpkt(sock, &timeo); |
| 1079 | } while (!rc); |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 1080 | |
Jon Paul Maloy | 22d85c7 | 2015-07-16 16:54:23 -0400 | [diff] [blame] | 1081 | __skb_queue_purge(pktchain); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1082 | return sent ? sent : rc; |
| 1083 | } |
| 1084 | |
| 1085 | /** |
| 1086 | * tipc_send_packet - send a connection-oriented message |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1087 | * @sock: socket structure |
| 1088 | * @m: message to send |
| 1089 | * @dsz: length of data to be transmitted |
| 1090 | * |
| 1091 | * Used for SOCK_SEQPACKET messages. |
| 1092 | * |
| 1093 | * Returns the number of bytes sent on success, or errno otherwise |
| 1094 | */ |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 1095 | static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz) |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1096 | { |
| 1097 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
| 1098 | return -EMSGSIZE; |
| 1099 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 1100 | return tipc_send_stream(sock, m, dsz); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1101 | } |
| 1102 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1103 | /* tipc_sk_finish_conn - complete the setup of a connection |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1104 | */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1105 | static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port, |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1106 | u32 peer_node) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1107 | { |
Ying Xue | 3721e9c | 2015-01-13 17:07:48 +0800 | [diff] [blame] | 1108 | struct sock *sk = &tsk->sk; |
| 1109 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1110 | struct tipc_msg *msg = &tsk->phdr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1111 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1112 | msg_set_destnode(msg, peer_node); |
| 1113 | msg_set_destport(msg, peer_port); |
| 1114 | msg_set_type(msg, TIPC_CONN_MSG); |
| 1115 | msg_set_lookup_scope(msg, 0); |
| 1116 | msg_set_hdr_sz(msg, SHORT_H_SIZE); |
Jon Paul Maloy | f9fef18 | 2014-03-12 11:31:08 -0400 | [diff] [blame] | 1117 | |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 1118 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1119 | tsk->probing_state = TIPC_CONN_OK; |
| 1120 | tsk->connected = 1; |
Ying Xue | 3721e9c | 2015-01-13 17:07:48 +0800 | [diff] [blame] | 1121 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1122 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
| 1123 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1124 | } |
| 1125 | |
| 1126 | /** |
| 1127 | * set_orig_addr - capture sender's address for received message |
| 1128 | * @m: descriptor for message info |
| 1129 | * @msg: received message header |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1130 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1131 | * Note: Address is not captured if not requested by receiver. |
| 1132 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 1133 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1134 | { |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 1135 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1136 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1137 | if (addr) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1138 | addr->family = AF_TIPC; |
| 1139 | addr->addrtype = TIPC_ADDR_ID; |
Mathias Krause | 60085c3 | 2013-04-07 01:52:00 +0000 | [diff] [blame] | 1140 | memset(&addr->addr, 0, sizeof(addr->addr)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1141 | addr->addr.id.ref = msg_origport(msg); |
| 1142 | addr->addr.id.node = msg_orignode(msg); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1143 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
| 1144 | addr->scope = 0; /* could leave uninitialized */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1145 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
| 1146 | } |
| 1147 | } |
| 1148 | |
| 1149 | /** |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1150 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1151 | * @m: descriptor for message info |
| 1152 | * @msg: received message header |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1153 | * @tsk: TIPC port associated with message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1154 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1155 | * Note: Ancillary data is not captured if not requested by receiver. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1156 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1157 | * Returns 0 if successful, otherwise errno |
| 1158 | */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1159 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
| 1160 | struct tipc_sock *tsk) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1161 | { |
| 1162 | u32 anc_data[3]; |
| 1163 | u32 err; |
| 1164 | u32 dest_type; |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1165 | int has_name; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1166 | int res; |
| 1167 | |
| 1168 | if (likely(m->msg_controllen == 0)) |
| 1169 | return 0; |
| 1170 | |
| 1171 | /* Optionally capture errored message object(s) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1172 | err = msg ? msg_errcode(msg) : 0; |
| 1173 | if (unlikely(err)) { |
| 1174 | anc_data[0] = err; |
| 1175 | anc_data[1] = msg_data_sz(msg); |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1176 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
| 1177 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1178 | return res; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1179 | if (anc_data[1]) { |
| 1180 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], |
| 1181 | msg_data(msg)); |
| 1182 | if (res) |
| 1183 | return res; |
| 1184 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1185 | } |
| 1186 | |
| 1187 | /* Optionally capture message destination object */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1188 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
| 1189 | switch (dest_type) { |
| 1190 | case TIPC_NAMED_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1191 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1192 | anc_data[0] = msg_nametype(msg); |
| 1193 | anc_data[1] = msg_namelower(msg); |
| 1194 | anc_data[2] = msg_namelower(msg); |
| 1195 | break; |
| 1196 | case TIPC_MCAST_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1197 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1198 | anc_data[0] = msg_nametype(msg); |
| 1199 | anc_data[1] = msg_namelower(msg); |
| 1200 | anc_data[2] = msg_nameupper(msg); |
| 1201 | break; |
| 1202 | case TIPC_CONN_MSG: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1203 | has_name = (tsk->conn_type != 0); |
| 1204 | anc_data[0] = tsk->conn_type; |
| 1205 | anc_data[1] = tsk->conn_instance; |
| 1206 | anc_data[2] = tsk->conn_instance; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1207 | break; |
| 1208 | default: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1209 | has_name = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1210 | } |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1211 | if (has_name) { |
| 1212 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); |
| 1213 | if (res) |
| 1214 | return res; |
| 1215 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1216 | |
| 1217 | return 0; |
| 1218 | } |
| 1219 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1220 | static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack) |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1221 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1222 | struct net *net = sock_net(&tsk->sk); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1223 | struct sk_buff *skb = NULL; |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1224 | struct tipc_msg *msg; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1225 | u32 peer_port = tsk_peer_port(tsk); |
| 1226 | u32 dnode = tsk_peer_node(tsk); |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1227 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1228 | if (!tsk->connected) |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1229 | return; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1230 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
| 1231 | dnode, tsk_own_node(tsk), peer_port, |
| 1232 | tsk->portid, TIPC_OK); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1233 | if (!skb) |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1234 | return; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1235 | msg = buf_msg(skb); |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1236 | msg_set_msgcnt(msg, ack); |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 1237 | tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1238 | } |
| 1239 | |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1240 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1241 | { |
| 1242 | struct sock *sk = sock->sk; |
| 1243 | DEFINE_WAIT(wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1244 | long timeo = *timeop; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1245 | int err; |
| 1246 | |
| 1247 | for (;;) { |
| 1248 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 1249 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1250 | if (sock->state == SS_DISCONNECTING) { |
| 1251 | err = -ENOTCONN; |
| 1252 | break; |
| 1253 | } |
| 1254 | release_sock(sk); |
| 1255 | timeo = schedule_timeout(timeo); |
| 1256 | lock_sock(sk); |
| 1257 | } |
| 1258 | err = 0; |
| 1259 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 1260 | break; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1261 | err = -EAGAIN; |
| 1262 | if (!timeo) |
| 1263 | break; |
Erik Hugne | 143fe22 | 2015-03-09 10:43:42 +0100 | [diff] [blame] | 1264 | err = sock_intr_errno(timeo); |
| 1265 | if (signal_pending(current)) |
| 1266 | break; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1267 | } |
| 1268 | finish_wait(sk_sleep(sk), &wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1269 | *timeop = timeo; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1270 | return err; |
| 1271 | } |
| 1272 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1273 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1274 | * tipc_recvmsg - receive packet-oriented message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1275 | * @m: descriptor for message info |
| 1276 | * @buf_len: total size of user buffer area |
| 1277 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1278 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1279 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
| 1280 | * If the complete message doesn't fit in user area, truncate it. |
| 1281 | * |
| 1282 | * Returns size of returned message data, errno otherwise |
| 1283 | */ |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 1284 | static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len, |
| 1285 | int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1286 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1287 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1288 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1289 | struct sk_buff *buf; |
| 1290 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1291 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1292 | unsigned int sz; |
| 1293 | u32 err; |
| 1294 | int res; |
| 1295 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1296 | /* Catch invalid receive requests */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1297 | if (unlikely(!buf_len)) |
| 1298 | return -EINVAL; |
| 1299 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1300 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1301 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1302 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1303 | res = -ENOTCONN; |
| 1304 | goto exit; |
| 1305 | } |
| 1306 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1307 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1308 | restart: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1309 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1310 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1311 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1312 | if (res) |
| 1313 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1314 | |
| 1315 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1316 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1317 | msg = buf_msg(buf); |
| 1318 | sz = msg_data_sz(msg); |
| 1319 | err = msg_errcode(msg); |
| 1320 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1321 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1322 | if ((!sz) && (!err)) { |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1323 | tsk_advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1324 | goto restart; |
| 1325 | } |
| 1326 | |
| 1327 | /* Capture sender's address (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1328 | set_orig_addr(m, msg); |
| 1329 | |
| 1330 | /* Capture ancillary data (optional) */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1331 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1332 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1333 | goto exit; |
| 1334 | |
| 1335 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1336 | if (!err) { |
| 1337 | if (unlikely(buf_len < sz)) { |
| 1338 | sz = buf_len; |
| 1339 | m->msg_flags |= MSG_TRUNC; |
| 1340 | } |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 1341 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1342 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1343 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1344 | res = sz; |
| 1345 | } else { |
| 1346 | if ((sock->state == SS_READY) || |
| 1347 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) |
| 1348 | res = 0; |
| 1349 | else |
| 1350 | res = -ECONNRESET; |
| 1351 | } |
| 1352 | |
| 1353 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1354 | if (likely(!(flags & MSG_PEEK))) { |
Allan Stephens | 9900980 | 2008-04-15 00:06:12 -0700 | [diff] [blame] | 1355 | if ((sock->state != SS_READY) && |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1356 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1357 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1358 | tsk->rcv_unacked = 0; |
| 1359 | } |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1360 | tsk_advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1361 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1362 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1363 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1364 | return res; |
| 1365 | } |
| 1366 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1367 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1368 | * tipc_recv_stream - receive stream-oriented data |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1369 | * @m: descriptor for message info |
| 1370 | * @buf_len: total size of user buffer area |
| 1371 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1372 | * |
| 1373 | * Used for SOCK_STREAM messages only. If not enough data is available |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1374 | * will optionally wait for more; never truncates data. |
| 1375 | * |
| 1376 | * Returns size of returned message data, errno otherwise |
| 1377 | */ |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 1378 | static int tipc_recv_stream(struct socket *sock, struct msghdr *m, |
| 1379 | size_t buf_len, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1380 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1381 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1382 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1383 | struct sk_buff *buf; |
| 1384 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1385 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1386 | unsigned int sz; |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1387 | int sz_to_copy, target, needed; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1388 | int sz_copied = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1389 | u32 err; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1390 | int res = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1391 | |
| 1392 | /* Catch invalid receive attempts */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1393 | if (unlikely(!buf_len)) |
| 1394 | return -EINVAL; |
| 1395 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1396 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1397 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1398 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1399 | res = -ENOTCONN; |
| 1400 | goto exit; |
| 1401 | } |
| 1402 | |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1403 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1404 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 1405 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1406 | restart: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1407 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1408 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1409 | if (res) |
| 1410 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1411 | |
| 1412 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1413 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1414 | msg = buf_msg(buf); |
| 1415 | sz = msg_data_sz(msg); |
| 1416 | err = msg_errcode(msg); |
| 1417 | |
| 1418 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1419 | if ((!sz) && (!err)) { |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1420 | tsk_advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1421 | goto restart; |
| 1422 | } |
| 1423 | |
| 1424 | /* Optionally capture sender's address & ancillary data of first msg */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1425 | if (sz_copied == 0) { |
| 1426 | set_orig_addr(m, msg); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1427 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1428 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1429 | goto exit; |
| 1430 | } |
| 1431 | |
| 1432 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1433 | if (!err) { |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1434 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1435 | |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1436 | sz -= offset; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1437 | needed = (buf_len - sz_copied); |
| 1438 | sz_to_copy = (sz <= needed) ? sz : needed; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1439 | |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 1440 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
| 1441 | m, sz_to_copy); |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1442 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1443 | goto exit; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1444 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1445 | sz_copied += sz_to_copy; |
| 1446 | |
| 1447 | if (sz_to_copy < sz) { |
| 1448 | if (!(flags & MSG_PEEK)) |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1449 | TIPC_SKB_CB(buf)->handle = |
| 1450 | (void *)(unsigned long)(offset + sz_to_copy); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1451 | goto exit; |
| 1452 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1453 | } else { |
| 1454 | if (sz_copied != 0) |
| 1455 | goto exit; /* can't add error msg to valid data */ |
| 1456 | |
| 1457 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) |
| 1458 | res = 0; |
| 1459 | else |
| 1460 | res = -ECONNRESET; |
| 1461 | } |
| 1462 | |
| 1463 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1464 | if (likely(!(flags & MSG_PEEK))) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1465 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1466 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1467 | tsk->rcv_unacked = 0; |
| 1468 | } |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1469 | tsk_advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1470 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1471 | |
| 1472 | /* Loop around if more data is required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1473 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
| 1474 | (!skb_queue_empty(&sk->sk_receive_queue) || |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1475 | (sz_copied < target)) && /* and more is ready or required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1476 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
| 1477 | (!err)) /* and haven't reached a FIN */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1478 | goto restart; |
| 1479 | |
| 1480 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1481 | release_sock(sk); |
Allan Stephens | a3b0a5a | 2006-06-25 23:48:22 -0700 | [diff] [blame] | 1482 | return sz_copied ? sz_copied : res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1483 | } |
| 1484 | |
| 1485 | /** |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1486 | * tipc_write_space - wake up thread if port congestion is released |
| 1487 | * @sk: socket |
| 1488 | */ |
| 1489 | static void tipc_write_space(struct sock *sk) |
| 1490 | { |
| 1491 | struct socket_wq *wq; |
| 1492 | |
| 1493 | rcu_read_lock(); |
| 1494 | wq = rcu_dereference(sk->sk_wq); |
| 1495 | if (wq_has_sleeper(wq)) |
| 1496 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
| 1497 | POLLWRNORM | POLLWRBAND); |
| 1498 | rcu_read_unlock(); |
| 1499 | } |
| 1500 | |
| 1501 | /** |
| 1502 | * tipc_data_ready - wake up threads to indicate messages have been received |
| 1503 | * @sk: socket |
| 1504 | * @len: the length of messages |
| 1505 | */ |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1506 | static void tipc_data_ready(struct sock *sk) |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1507 | { |
| 1508 | struct socket_wq *wq; |
| 1509 | |
| 1510 | rcu_read_lock(); |
| 1511 | wq = rcu_dereference(sk->sk_wq); |
| 1512 | if (wq_has_sleeper(wq)) |
| 1513 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
| 1514 | POLLRDNORM | POLLRDBAND); |
| 1515 | rcu_read_unlock(); |
| 1516 | } |
| 1517 | |
| 1518 | /** |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1519 | * filter_connect - Handle all incoming messages for a connection-based socket |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1520 | * @tsk: TIPC socket |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1521 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1522 | * |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1523 | * Returns true if everything ok, false otherwise |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1524 | */ |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1525 | static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb) |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1526 | { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1527 | struct sock *sk = &tsk->sk; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1528 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1529 | struct socket *sock = sk->sk_socket; |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1530 | struct tipc_msg *hdr = buf_msg(skb); |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1531 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1532 | if (unlikely(msg_mcast(hdr))) |
| 1533 | return false; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1534 | |
| 1535 | switch ((int)sock->state) { |
| 1536 | case SS_CONNECTED: |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1537 | |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1538 | /* Accept only connection-based messages sent by peer */ |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1539 | if (unlikely(!tsk_peer_msg(tsk, hdr))) |
| 1540 | return false; |
| 1541 | |
| 1542 | if (unlikely(msg_errcode(hdr))) { |
| 1543 | sock->state = SS_DISCONNECTING; |
| 1544 | tsk->connected = 0; |
| 1545 | /* Let timer expire on it's own */ |
| 1546 | tipc_node_remove_conn(net, tsk_peer_node(tsk), |
| 1547 | tsk->portid); |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1548 | } |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1549 | return true; |
| 1550 | |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1551 | case SS_CONNECTING: |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1552 | |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1553 | /* Accept only ACK or NACK message */ |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1554 | if (unlikely(!msg_connected(hdr))) |
| 1555 | return false; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1556 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1557 | if (unlikely(msg_errcode(hdr))) { |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1558 | sock->state = SS_DISCONNECTING; |
Erik Hugne | 2c8d851 | 2013-08-28 09:29:58 +0200 | [diff] [blame] | 1559 | sk->sk_err = ECONNREFUSED; |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1560 | return true; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1561 | } |
| 1562 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1563 | if (unlikely(!msg_isdata(hdr))) { |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1564 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1565 | sk->sk_err = EINVAL; |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1566 | return true; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1567 | } |
| 1568 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1569 | tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr)); |
| 1570 | msg_set_importance(&tsk->phdr, msg_importance(hdr)); |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1571 | sock->state = SS_CONNECTED; |
| 1572 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1573 | /* If 'ACK+' message, add to socket receive queue */ |
| 1574 | if (msg_data_sz(hdr)) |
| 1575 | return true; |
| 1576 | |
| 1577 | /* If empty 'ACK-' message, wake up sleeping connect() */ |
| 1578 | if (waitqueue_active(sk_sleep(sk))) |
| 1579 | wake_up_interruptible(sk_sleep(sk)); |
| 1580 | |
| 1581 | /* 'ACK-' message is neither accepted nor rejected: */ |
| 1582 | msg_set_dest_droppable(hdr, 1); |
| 1583 | return false; |
| 1584 | |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1585 | case SS_LISTENING: |
| 1586 | case SS_UNCONNECTED: |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1587 | |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1588 | /* Accept only SYN message */ |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1589 | if (!msg_connected(hdr) && !(msg_errcode(hdr))) |
| 1590 | return true; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1591 | break; |
| 1592 | case SS_DISCONNECTING: |
| 1593 | break; |
| 1594 | default: |
| 1595 | pr_err("Unknown socket state %u\n", sock->state); |
| 1596 | } |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1597 | return false; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1598 | } |
| 1599 | |
| 1600 | /** |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1601 | * rcvbuf_limit - get proper overload limit of socket receive queue |
| 1602 | * @sk: socket |
| 1603 | * @buf: message |
| 1604 | * |
| 1605 | * For all connection oriented messages, irrespective of importance, |
| 1606 | * the default overload value (i.e. 67MB) is set as limit. |
| 1607 | * |
| 1608 | * For all connectionless messages, by default new queue limits are |
| 1609 | * as belows: |
| 1610 | * |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 1611 | * TIPC_LOW_IMPORTANCE (4 MB) |
| 1612 | * TIPC_MEDIUM_IMPORTANCE (8 MB) |
| 1613 | * TIPC_HIGH_IMPORTANCE (16 MB) |
| 1614 | * TIPC_CRITICAL_IMPORTANCE (32 MB) |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1615 | * |
| 1616 | * Returns overload limit according to corresponding message importance |
| 1617 | */ |
| 1618 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) |
| 1619 | { |
| 1620 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1621 | |
| 1622 | if (msg_connected(msg)) |
wangweidong | 0cee6bb | 2013-12-12 09:36:39 +0800 | [diff] [blame] | 1623 | return sysctl_tipc_rmem[2]; |
| 1624 | |
| 1625 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << |
| 1626 | msg_importance(msg); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1627 | } |
| 1628 | |
| 1629 | /** |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1630 | * filter_rcv - validate incoming message |
| 1631 | * @sk: socket |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1632 | * @skb: pointer to message. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1633 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1634 | * Enqueues message on receive queue if acceptable; optionally handles |
| 1635 | * disconnect indication for a connected socket. |
| 1636 | * |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1637 | * Called with socket lock already taken |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1638 | * |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1639 | * Returns true if message was added to socket receive queue, otherwise false |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1640 | */ |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1641 | static bool filter_rcv(struct sock *sk, struct sk_buff *skb) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1642 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1643 | struct socket *sock = sk->sk_socket; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1644 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1645 | struct tipc_msg *hdr = buf_msg(skb); |
| 1646 | unsigned int limit = rcvbuf_limit(sk, skb); |
| 1647 | int err = TIPC_OK; |
| 1648 | int usr = msg_user(hdr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1649 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1650 | if (unlikely(msg_user(hdr) == CONN_MANAGER)) { |
| 1651 | tipc_sk_proto_rcv(tsk, skb); |
| 1652 | return false; |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1653 | } |
Jon Paul Maloy | ec8a2e5 | 2014-06-25 20:41:40 -0500 | [diff] [blame] | 1654 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1655 | if (unlikely(usr == SOCK_WAKEUP)) { |
| 1656 | kfree_skb(skb); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1657 | tsk->link_cong = 0; |
| 1658 | sk->sk_write_space(sk); |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1659 | return false; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1660 | } |
| 1661 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1662 | /* Drop if illegal message type */ |
| 1663 | if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) { |
| 1664 | kfree_skb(skb); |
| 1665 | return false; |
| 1666 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1667 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1668 | /* Reject if wrong message type for current socket state */ |
| 1669 | if (unlikely(sock->state == SS_READY)) { |
| 1670 | if (msg_connected(hdr)) { |
| 1671 | err = TIPC_ERR_NO_PORT; |
| 1672 | goto reject; |
| 1673 | } |
| 1674 | } else if (unlikely(!filter_connect(tsk, skb))) { |
| 1675 | err = TIPC_ERR_NO_PORT; |
| 1676 | goto reject; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1677 | } |
| 1678 | |
| 1679 | /* Reject message if there isn't room to queue it */ |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1680 | if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) { |
| 1681 | err = TIPC_ERR_OVERLOAD; |
| 1682 | goto reject; |
| 1683 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1684 | |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1685 | /* Enqueue message */ |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1686 | TIPC_SKB_CB(skb)->handle = NULL; |
| 1687 | __skb_queue_tail(&sk->sk_receive_queue, skb); |
| 1688 | skb_set_owner_r(skb, sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1689 | |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1690 | sk->sk_data_ready(sk); |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1691 | return true; |
| 1692 | |
| 1693 | reject: |
| 1694 | tipc_sk_respond(sk, skb, err); |
| 1695 | return false; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1696 | } |
| 1697 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1698 | /** |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1699 | * tipc_backlog_rcv - handle incoming message from backlog queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1700 | * @sk: socket |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1701 | * @skb: message |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1702 | * |
Jon Paul Maloy | e3a7756 | 2015-02-05 08:36:39 -0500 | [diff] [blame] | 1703 | * Caller must hold socket lock |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1704 | * |
| 1705 | * Returns 0 |
| 1706 | */ |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1707 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1708 | { |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1709 | unsigned int truesize = skb->truesize; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1710 | |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1711 | if (likely(filter_rcv(sk, skb))) |
| 1712 | atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1713 | return 0; |
| 1714 | } |
| 1715 | |
| 1716 | /** |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1717 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
| 1718 | * inputq and try adding them to socket or backlog queue |
| 1719 | * @inputq: list of incoming buffers with potentially different destinations |
| 1720 | * @sk: socket where the buffers should be enqueued |
| 1721 | * @dport: port number for the socket |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1722 | * |
| 1723 | * Caller must hold socket lock |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1724 | */ |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1725 | static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
| 1726 | u32 dport) |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1727 | { |
| 1728 | unsigned int lim; |
| 1729 | atomic_t *dcnt; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1730 | struct sk_buff *skb; |
| 1731 | unsigned long time_limit = jiffies + 2; |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1732 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1733 | while (skb_queue_len(inputq)) { |
Jon Paul Maloy | 51a00da | 2015-02-08 11:10:50 -0500 | [diff] [blame] | 1734 | if (unlikely(time_after_eq(jiffies, time_limit))) |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1735 | return; |
| 1736 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1737 | skb = tipc_skb_dequeue(inputq, dport); |
| 1738 | if (unlikely(!skb)) |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1739 | return; |
| 1740 | |
| 1741 | /* Add message directly to receive queue if possible */ |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1742 | if (!sock_owned_by_user(sk)) { |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1743 | filter_rcv(sk, skb); |
| 1744 | continue; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1745 | } |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1746 | |
| 1747 | /* Try backlog, compensating for double-counted bytes */ |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1748 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
| 1749 | if (sk->sk_backlog.len) |
| 1750 | atomic_set(dcnt, 0); |
| 1751 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); |
| 1752 | if (likely(!sk_add_backlog(sk, skb, lim))) |
| 1753 | continue; |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1754 | |
| 1755 | /* Overload => reject message back to sender */ |
| 1756 | tipc_sk_respond(sk, skb, TIPC_ERR_OVERLOAD); |
| 1757 | break; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1758 | } |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1759 | } |
| 1760 | |
| 1761 | /** |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1762 | * tipc_sk_rcv - handle a chain of incoming buffers |
| 1763 | * @inputq: buffer list containing the buffers |
| 1764 | * Consumes all buffers in list until inputq is empty |
| 1765 | * Note: may be called in multiple threads referring to the same queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1766 | */ |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1767 | void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1768 | { |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1769 | u32 dnode, dport = 0; |
Erik Hugne | 9871b27 | 2015-04-23 09:37:39 -0400 | [diff] [blame] | 1770 | int err; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1771 | struct tipc_sock *tsk; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1772 | struct sock *sk; |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1773 | struct sk_buff *skb; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1774 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1775 | while (skb_queue_len(inputq)) { |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1776 | dport = tipc_skb_peek_port(inputq, dport); |
| 1777 | tsk = tipc_sk_lookup(net, dport); |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1778 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1779 | if (likely(tsk)) { |
| 1780 | sk = &tsk->sk; |
| 1781 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1782 | tipc_sk_enqueue(inputq, sk, dport); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1783 | spin_unlock_bh(&sk->sk_lock.slock); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1784 | } |
| 1785 | sock_put(sk); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1786 | continue; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1787 | } |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1788 | |
| 1789 | /* No destination socket => dequeue skb if still there */ |
| 1790 | skb = tipc_skb_dequeue(inputq, dport); |
| 1791 | if (!skb) |
| 1792 | return; |
| 1793 | |
| 1794 | /* Try secondary lookup if unresolved named message */ |
| 1795 | err = TIPC_ERR_NO_PORT; |
| 1796 | if (tipc_msg_lookup_dest(net, skb, &err)) |
| 1797 | goto xmit; |
| 1798 | |
| 1799 | /* Prepare for message rejection */ |
| 1800 | if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err)) |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1801 | continue; |
Jon Paul Maloy | e3a7756 | 2015-02-05 08:36:39 -0500 | [diff] [blame] | 1802 | xmit: |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 1803 | dnode = msg_destnode(buf_msg(skb)); |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 1804 | tipc_node_xmit_skb(net, skb, dnode, dport); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1805 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1806 | } |
| 1807 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1808 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
| 1809 | { |
| 1810 | struct sock *sk = sock->sk; |
| 1811 | DEFINE_WAIT(wait); |
| 1812 | int done; |
| 1813 | |
| 1814 | do { |
| 1815 | int err = sock_error(sk); |
| 1816 | if (err) |
| 1817 | return err; |
| 1818 | if (!*timeo_p) |
| 1819 | return -ETIMEDOUT; |
| 1820 | if (signal_pending(current)) |
| 1821 | return sock_intr_errno(*timeo_p); |
| 1822 | |
| 1823 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
| 1824 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); |
| 1825 | finish_wait(sk_sleep(sk), &wait); |
| 1826 | } while (!done); |
| 1827 | return 0; |
| 1828 | } |
| 1829 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1830 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1831 | * tipc_connect - establish a connection to another TIPC port |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1832 | * @sock: socket structure |
| 1833 | * @dest: socket address for destination port |
| 1834 | * @destlen: size of socket address data structure |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1835 | * @flags: file-related flags associated with socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1836 | * |
| 1837 | * Returns 0 on success, errno otherwise |
| 1838 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1839 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
| 1840 | int destlen, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1841 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1842 | struct sock *sk = sock->sk; |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 1843 | struct tipc_sock *tsk = tipc_sk(sk); |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1844 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
| 1845 | struct msghdr m = {NULL,}; |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 1846 | long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1847 | socket_state previous; |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 1848 | int res = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1849 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1850 | lock_sock(sk); |
| 1851 | |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 1852 | /* DGRAM/RDM connect(), just save the destaddr */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1853 | if (sock->state == SS_READY) { |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 1854 | if (dst->family == AF_UNSPEC) { |
| 1855 | memset(&tsk->remote, 0, sizeof(struct sockaddr_tipc)); |
| 1856 | tsk->connected = 0; |
Sasha Levin | 610600c | 2015-03-23 15:30:00 -0400 | [diff] [blame] | 1857 | } else if (destlen != sizeof(struct sockaddr_tipc)) { |
| 1858 | res = -EINVAL; |
Erik Hugne | f2f8036 | 2015-03-19 09:02:19 +0100 | [diff] [blame] | 1859 | } else { |
| 1860 | memcpy(&tsk->remote, dest, destlen); |
| 1861 | tsk->connected = 1; |
| 1862 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1863 | goto exit; |
| 1864 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1865 | |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1866 | /* |
| 1867 | * Reject connection attempt using multicast address |
| 1868 | * |
| 1869 | * Note: send_msg() validates the rest of the address fields, |
| 1870 | * so there's no need to do it here |
| 1871 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1872 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
| 1873 | res = -EINVAL; |
| 1874 | goto exit; |
| 1875 | } |
| 1876 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1877 | previous = sock->state; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1878 | switch (sock->state) { |
| 1879 | case SS_UNCONNECTED: |
| 1880 | /* Send a 'SYN-' to destination */ |
| 1881 | m.msg_name = dest; |
| 1882 | m.msg_namelen = destlen; |
| 1883 | |
| 1884 | /* If connect is in non-blocking case, set MSG_DONTWAIT to |
| 1885 | * indicate send_msg() is never blocked. |
| 1886 | */ |
| 1887 | if (!timeout) |
| 1888 | m.msg_flags = MSG_DONTWAIT; |
| 1889 | |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 1890 | res = __tipc_sendmsg(sock, &m, 0); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1891 | if ((res < 0) && (res != -EWOULDBLOCK)) |
| 1892 | goto exit; |
| 1893 | |
| 1894 | /* Just entered SS_CONNECTING state; the only |
| 1895 | * difference is that return value in non-blocking |
| 1896 | * case is EINPROGRESS, rather than EALREADY. |
| 1897 | */ |
| 1898 | res = -EINPROGRESS; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1899 | case SS_CONNECTING: |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1900 | if (previous == SS_CONNECTING) |
| 1901 | res = -EALREADY; |
| 1902 | if (!timeout) |
| 1903 | goto exit; |
| 1904 | timeout = msecs_to_jiffies(timeout); |
| 1905 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ |
| 1906 | res = tipc_wait_for_connect(sock, &timeout); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1907 | break; |
| 1908 | case SS_CONNECTED: |
| 1909 | res = -EISCONN; |
| 1910 | break; |
| 1911 | default: |
| 1912 | res = -EINVAL; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1913 | break; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1914 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1915 | exit: |
| 1916 | release_sock(sk); |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1917 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1918 | } |
| 1919 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1920 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1921 | * tipc_listen - allow socket to listen for incoming connections |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1922 | * @sock: socket structure |
| 1923 | * @len: (unused) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1924 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1925 | * Returns 0 on success, errno otherwise |
| 1926 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1927 | static int tipc_listen(struct socket *sock, int len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1928 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1929 | struct sock *sk = sock->sk; |
| 1930 | int res; |
| 1931 | |
| 1932 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1933 | |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 1934 | if (sock->state != SS_UNCONNECTED) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1935 | res = -EINVAL; |
| 1936 | else { |
| 1937 | sock->state = SS_LISTENING; |
| 1938 | res = 0; |
| 1939 | } |
| 1940 | |
| 1941 | release_sock(sk); |
| 1942 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1943 | } |
| 1944 | |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1945 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
| 1946 | { |
| 1947 | struct sock *sk = sock->sk; |
| 1948 | DEFINE_WAIT(wait); |
| 1949 | int err; |
| 1950 | |
| 1951 | /* True wake-one mechanism for incoming connections: only |
| 1952 | * one process gets woken up, not the 'whole herd'. |
| 1953 | * Since we do not 'race & poll' for established sockets |
| 1954 | * anymore, the common case will execute the loop only once. |
| 1955 | */ |
| 1956 | for (;;) { |
| 1957 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, |
| 1958 | TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 1959 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1960 | release_sock(sk); |
| 1961 | timeo = schedule_timeout(timeo); |
| 1962 | lock_sock(sk); |
| 1963 | } |
| 1964 | err = 0; |
| 1965 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 1966 | break; |
| 1967 | err = -EINVAL; |
| 1968 | if (sock->state != SS_LISTENING) |
| 1969 | break; |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1970 | err = -EAGAIN; |
| 1971 | if (!timeo) |
| 1972 | break; |
Erik Hugne | 143fe22 | 2015-03-09 10:43:42 +0100 | [diff] [blame] | 1973 | err = sock_intr_errno(timeo); |
| 1974 | if (signal_pending(current)) |
| 1975 | break; |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1976 | } |
| 1977 | finish_wait(sk_sleep(sk), &wait); |
| 1978 | return err; |
| 1979 | } |
| 1980 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1981 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1982 | * tipc_accept - wait for connection request |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1983 | * @sock: listening socket |
| 1984 | * @newsock: new socket that is to be connected |
| 1985 | * @flags: file-related flags associated with socket |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1986 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1987 | * Returns 0 on success, errno otherwise |
| 1988 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1989 | static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1990 | { |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1991 | struct sock *new_sk, *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1992 | struct sk_buff *buf; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1993 | struct tipc_sock *new_tsock; |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1994 | struct tipc_msg *msg; |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1995 | long timeo; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1996 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1997 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1998 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1999 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2000 | if (sock->state != SS_LISTENING) { |
| 2001 | res = -EINVAL; |
| 2002 | goto exit; |
| 2003 | } |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 2004 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 2005 | res = tipc_wait_for_accept(sock, timeo); |
| 2006 | if (res) |
| 2007 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2008 | |
| 2009 | buf = skb_peek(&sk->sk_receive_queue); |
| 2010 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2011 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2012 | if (res) |
| 2013 | goto exit; |
Stephen Smalley | fdd75ea | 2015-07-07 09:43:45 -0400 | [diff] [blame] | 2014 | security_sk_clone(sock->sk, new_sock->sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2015 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2016 | new_sk = new_sock->sk; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2017 | new_tsock = tipc_sk(new_sk); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2018 | msg = buf_msg(buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2019 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2020 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
| 2021 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2022 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2023 | /* |
| 2024 | * Reject any stray messages received by new socket |
| 2025 | * before the socket lock was taken (very, very unlikely) |
| 2026 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 2027 | tsk_rej_rx_queue(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2028 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2029 | /* Connect new socket to it's peer */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2030 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2031 | new_sock->state = SS_CONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2032 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2033 | tsk_set_importance(new_tsock, msg_importance(msg)); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2034 | if (msg_named(msg)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2035 | new_tsock->conn_type = msg_nametype(msg); |
| 2036 | new_tsock->conn_instance = msg_nameinst(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2037 | } |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2038 | |
| 2039 | /* |
| 2040 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. |
| 2041 | * Respond to 'SYN+' by queuing it on new socket. |
| 2042 | */ |
| 2043 | if (!msg_data_sz(msg)) { |
| 2044 | struct msghdr m = {NULL,}; |
| 2045 | |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 2046 | tsk_advance_rx_queue(sk); |
Ying Xue | 39a0295 | 2015-03-02 15:37:47 +0800 | [diff] [blame] | 2047 | __tipc_send_stream(new_sock, &m, 0); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2048 | } else { |
| 2049 | __skb_dequeue(&sk->sk_receive_queue); |
| 2050 | __skb_queue_head(&new_sk->sk_receive_queue, buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 2051 | skb_set_owner_r(buf, new_sk); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2052 | } |
| 2053 | release_sock(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2054 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2055 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2056 | return res; |
| 2057 | } |
| 2058 | |
| 2059 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2060 | * tipc_shutdown - shutdown socket connection |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2061 | * @sock: socket structure |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 2062 | * @how: direction to close (must be SHUT_RDWR) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2063 | * |
| 2064 | * Terminates connection (if necessary), then purges socket's receive queue. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2065 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2066 | * Returns 0 on success, errno otherwise |
| 2067 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2068 | static int tipc_shutdown(struct socket *sock, int how) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2069 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2070 | struct sock *sk = sock->sk; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2071 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2072 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 2073 | struct sk_buff *skb; |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 2074 | u32 dnode = tsk_peer_node(tsk); |
| 2075 | u32 dport = tsk_peer_port(tsk); |
| 2076 | u32 onode = tipc_own_addr(net); |
| 2077 | u32 oport = tsk->portid; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2078 | int res; |
| 2079 | |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 2080 | if (how != SHUT_RDWR) |
| 2081 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2082 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2083 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2084 | |
| 2085 | switch (sock->state) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2086 | case SS_CONNECTING: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2087 | case SS_CONNECTED: |
| 2088 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2089 | restart: |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 2090 | dnode = tsk_peer_node(tsk); |
| 2091 | |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 2092 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 2093 | skb = __skb_dequeue(&sk->sk_receive_queue); |
| 2094 | if (skb) { |
| 2095 | if (TIPC_SKB_CB(skb)->handle != NULL) { |
| 2096 | kfree_skb(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2097 | goto restart; |
| 2098 | } |
Jon Paul Maloy | bcd3ffd | 2015-07-22 10:11:19 -0400 | [diff] [blame] | 2099 | tipc_sk_respond(sk, skb, TIPC_CONN_SHUTDOWN); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2100 | } else { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2101 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
Jon Paul Maloy | 80e44c2 | 2014-08-22 18:09:10 -0400 | [diff] [blame] | 2102 | TIPC_CONN_MSG, SHORT_H_SIZE, |
Jon Paul Maloy | cda3696 | 2015-07-22 10:11:20 -0400 | [diff] [blame] | 2103 | 0, dnode, onode, dport, oport, |
| 2104 | TIPC_CONN_SHUTDOWN); |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 2105 | tipc_node_xmit_skb(net, skb, dnode, tsk->portid); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2106 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2107 | tsk->connected = 0; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2108 | sock->state = SS_DISCONNECTING; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2109 | tipc_node_remove_conn(net, dnode, tsk->portid); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2110 | /* fall through */ |
| 2111 | |
| 2112 | case SS_DISCONNECTING: |
| 2113 | |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 2114 | /* Discard any unreceived messages */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 2115 | __skb_queue_purge(&sk->sk_receive_queue); |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 2116 | |
| 2117 | /* Wake up anyone sleeping in poll */ |
| 2118 | sk->sk_state_change(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2119 | res = 0; |
| 2120 | break; |
| 2121 | |
| 2122 | default: |
| 2123 | res = -ENOTCONN; |
| 2124 | } |
| 2125 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2126 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2127 | return res; |
| 2128 | } |
| 2129 | |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 2130 | static void tipc_sk_timeout(unsigned long data) |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2131 | { |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 2132 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
| 2133 | struct sock *sk = &tsk->sk; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 2134 | struct sk_buff *skb = NULL; |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2135 | u32 peer_port, peer_node; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2136 | u32 own_node = tsk_own_node(tsk); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2137 | |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2138 | bh_lock_sock(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2139 | if (!tsk->connected) { |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2140 | bh_unlock_sock(sk); |
| 2141 | goto exit; |
| 2142 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2143 | peer_port = tsk_peer_port(tsk); |
| 2144 | peer_node = tsk_peer_node(tsk); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2145 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2146 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
Erik Hugne | b3be5e3 | 2015-06-09 17:27:12 +0200 | [diff] [blame] | 2147 | if (!sock_owned_by_user(sk)) { |
| 2148 | sk->sk_socket->state = SS_DISCONNECTING; |
| 2149 | tsk->connected = 0; |
| 2150 | tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk), |
| 2151 | tsk_peer_port(tsk)); |
| 2152 | sk->sk_state_change(sk); |
| 2153 | } else { |
| 2154 | /* Try again later */ |
| 2155 | sk_reset_timer(sk, &sk->sk_timer, (HZ / 20)); |
| 2156 | } |
| 2157 | |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2158 | } else { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2159 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
| 2160 | INT_H_SIZE, 0, peer_node, own_node, |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 2161 | peer_port, tsk->portid, TIPC_OK); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2162 | tsk->probing_state = TIPC_CONN_PROBING; |
Ying Xue | 3721e9c | 2015-01-13 17:07:48 +0800 | [diff] [blame] | 2163 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2164 | } |
| 2165 | bh_unlock_sock(sk); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 2166 | if (skb) |
Jon Paul Maloy | af9b028 | 2015-07-16 16:54:24 -0400 | [diff] [blame] | 2167 | tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2168 | exit: |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2169 | sock_put(sk); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2170 | } |
| 2171 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2172 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2173 | struct tipc_name_seq const *seq) |
| 2174 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2175 | struct net *net = sock_net(&tsk->sk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2176 | struct publication *publ; |
| 2177 | u32 key; |
| 2178 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2179 | if (tsk->connected) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2180 | return -EINVAL; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2181 | key = tsk->portid + tsk->pub_count + 1; |
| 2182 | if (key == tsk->portid) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2183 | return -EADDRINUSE; |
| 2184 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2185 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2186 | scope, tsk->portid, key); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2187 | if (unlikely(!publ)) |
| 2188 | return -EINVAL; |
| 2189 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2190 | list_add(&publ->pport_list, &tsk->publications); |
| 2191 | tsk->pub_count++; |
| 2192 | tsk->published = 1; |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2193 | return 0; |
| 2194 | } |
| 2195 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2196 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2197 | struct tipc_name_seq const *seq) |
| 2198 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2199 | struct net *net = sock_net(&tsk->sk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2200 | struct publication *publ; |
| 2201 | struct publication *safe; |
| 2202 | int rc = -EINVAL; |
| 2203 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2204 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2205 | if (seq) { |
| 2206 | if (publ->scope != scope) |
| 2207 | continue; |
| 2208 | if (publ->type != seq->type) |
| 2209 | continue; |
| 2210 | if (publ->lower != seq->lower) |
| 2211 | continue; |
| 2212 | if (publ->upper != seq->upper) |
| 2213 | break; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2214 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2215 | publ->ref, publ->key); |
| 2216 | rc = 0; |
| 2217 | break; |
| 2218 | } |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2219 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2220 | publ->ref, publ->key); |
| 2221 | rc = 0; |
| 2222 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2223 | if (list_empty(&tsk->publications)) |
| 2224 | tsk->published = 0; |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2225 | return rc; |
| 2226 | } |
| 2227 | |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2228 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
| 2229 | * when we go from standalone to network mode. |
| 2230 | */ |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2231 | void tipc_sk_reinit(struct net *net) |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2232 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2233 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2234 | const struct bucket_table *tbl; |
| 2235 | struct rhash_head *pos; |
| 2236 | struct tipc_sock *tsk; |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2237 | struct tipc_msg *msg; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2238 | int i; |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2239 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2240 | rcu_read_lock(); |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2241 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2242 | for (i = 0; i < tbl->size; i++) { |
| 2243 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { |
| 2244 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
| 2245 | msg = &tsk->phdr; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2246 | msg_set_prevnode(msg, tn->own_addr); |
| 2247 | msg_set_orignode(msg, tn->own_addr); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2248 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
| 2249 | } |
| 2250 | } |
| 2251 | rcu_read_unlock(); |
| 2252 | } |
| 2253 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2254 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2255 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2256 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2257 | struct tipc_sock *tsk; |
| 2258 | |
| 2259 | rcu_read_lock(); |
Herbert Xu | 6cca7289 | 2015-03-20 21:57:05 +1100 | [diff] [blame] | 2260 | tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2261 | if (tsk) |
| 2262 | sock_hold(&tsk->sk); |
| 2263 | rcu_read_unlock(); |
| 2264 | |
| 2265 | return tsk; |
| 2266 | } |
| 2267 | |
| 2268 | static int tipc_sk_insert(struct tipc_sock *tsk) |
| 2269 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2270 | struct sock *sk = &tsk->sk; |
| 2271 | struct net *net = sock_net(sk); |
| 2272 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2273 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
| 2274 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; |
| 2275 | |
| 2276 | while (remaining--) { |
| 2277 | portid++; |
| 2278 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) |
| 2279 | portid = TIPC_MIN_PORT; |
| 2280 | tsk->portid = portid; |
| 2281 | sock_hold(&tsk->sk); |
Herbert Xu | 6cca7289 | 2015-03-20 21:57:05 +1100 | [diff] [blame] | 2282 | if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node, |
| 2283 | tsk_rht_params)) |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2284 | return 0; |
| 2285 | sock_put(&tsk->sk); |
| 2286 | } |
| 2287 | |
| 2288 | return -1; |
| 2289 | } |
| 2290 | |
| 2291 | static void tipc_sk_remove(struct tipc_sock *tsk) |
| 2292 | { |
| 2293 | struct sock *sk = &tsk->sk; |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2294 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2295 | |
Herbert Xu | 6cca7289 | 2015-03-20 21:57:05 +1100 | [diff] [blame] | 2296 | if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) { |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2297 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
| 2298 | __sock_put(sk); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2299 | } |
| 2300 | } |
| 2301 | |
Herbert Xu | 6cca7289 | 2015-03-20 21:57:05 +1100 | [diff] [blame] | 2302 | static const struct rhashtable_params tsk_rht_params = { |
| 2303 | .nelem_hint = 192, |
| 2304 | .head_offset = offsetof(struct tipc_sock, node), |
| 2305 | .key_offset = offsetof(struct tipc_sock, portid), |
| 2306 | .key_len = sizeof(u32), /* portid */ |
Herbert Xu | 6cca7289 | 2015-03-20 21:57:05 +1100 | [diff] [blame] | 2307 | .max_size = 1048576, |
| 2308 | .min_size = 256, |
Thomas Graf | b5e2c15 | 2015-03-24 20:42:19 +0000 | [diff] [blame] | 2309 | .automatic_shrinking = true, |
Herbert Xu | 6cca7289 | 2015-03-20 21:57:05 +1100 | [diff] [blame] | 2310 | }; |
| 2311 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2312 | int tipc_sk_rht_init(struct net *net) |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2313 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2314 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2315 | |
Herbert Xu | 6cca7289 | 2015-03-20 21:57:05 +1100 | [diff] [blame] | 2316 | return rhashtable_init(&tn->sk_rht, &tsk_rht_params); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2317 | } |
| 2318 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2319 | void tipc_sk_rht_destroy(struct net *net) |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2320 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2321 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 2322 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2323 | /* Wait for socket readers to complete */ |
| 2324 | synchronize_net(); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2325 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2326 | rhashtable_destroy(&tn->sk_rht); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2327 | } |
| 2328 | |
| 2329 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2330 | * tipc_setsockopt - set socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2331 | * @sock: socket structure |
| 2332 | * @lvl: option level |
| 2333 | * @opt: option identifier |
| 2334 | * @ov: pointer to new option value |
| 2335 | * @ol: length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2336 | * |
| 2337 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2338 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2339 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2340 | * Returns 0 on success, errno otherwise |
| 2341 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2342 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
| 2343 | char __user *ov, unsigned int ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2344 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2345 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2346 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2347 | u32 value; |
| 2348 | int res; |
| 2349 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2350 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 2351 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2352 | if (lvl != SOL_TIPC) |
| 2353 | return -ENOPROTOOPT; |
| 2354 | if (ol < sizeof(value)) |
| 2355 | return -EINVAL; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 2356 | res = get_user(value, (u32 __user *)ov); |
| 2357 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2358 | return res; |
| 2359 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2360 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2361 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2362 | switch (opt) { |
| 2363 | case TIPC_IMPORTANCE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2364 | res = tsk_set_importance(tsk, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2365 | break; |
| 2366 | case TIPC_SRC_DROPPABLE: |
| 2367 | if (sock->type != SOCK_STREAM) |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2368 | tsk_set_unreliable(tsk, value); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2369 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2370 | res = -ENOPROTOOPT; |
| 2371 | break; |
| 2372 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2373 | tsk_set_unreturnable(tsk, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2374 | break; |
| 2375 | case TIPC_CONN_TIMEOUT: |
Allan Stephens | a0f40f0 | 2011-05-26 13:44:34 -0400 | [diff] [blame] | 2376 | tipc_sk(sk)->conn_timeout = value; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2377 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2378 | break; |
| 2379 | default: |
| 2380 | res = -EINVAL; |
| 2381 | } |
| 2382 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2383 | release_sock(sk); |
| 2384 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2385 | return res; |
| 2386 | } |
| 2387 | |
| 2388 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2389 | * tipc_getsockopt - get socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2390 | * @sock: socket structure |
| 2391 | * @lvl: option level |
| 2392 | * @opt: option identifier |
| 2393 | * @ov: receptacle for option value |
| 2394 | * @ol: receptacle for length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2395 | * |
| 2396 | * For stream sockets only, returns 0 length result for all IPPROTO_TCP options |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2397 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2398 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2399 | * Returns 0 on success, errno otherwise |
| 2400 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2401 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
| 2402 | char __user *ov, int __user *ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2403 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2404 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2405 | struct tipc_sock *tsk = tipc_sk(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2406 | int len; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2407 | u32 value; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2408 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2409 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2410 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 2411 | return put_user(0, ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2412 | if (lvl != SOL_TIPC) |
| 2413 | return -ENOPROTOOPT; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 2414 | res = get_user(len, ol); |
| 2415 | if (res) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2416 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2417 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2418 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2419 | |
| 2420 | switch (opt) { |
| 2421 | case TIPC_IMPORTANCE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2422 | value = tsk_importance(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2423 | break; |
| 2424 | case TIPC_SRC_DROPPABLE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2425 | value = tsk_unreliable(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2426 | break; |
| 2427 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2428 | value = tsk_unreturnable(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2429 | break; |
| 2430 | case TIPC_CONN_TIMEOUT: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2431 | value = tsk->conn_timeout; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2432 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2433 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2434 | case TIPC_NODE_RECVQ_DEPTH: |
Ying Xue | 9da3d47 | 2012-11-27 06:15:27 -0500 | [diff] [blame] | 2435 | value = 0; /* was tipc_queue_size, now obsolete */ |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2436 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2437 | case TIPC_SOCK_RECVQ_DEPTH: |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2438 | value = skb_queue_len(&sk->sk_receive_queue); |
| 2439 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2440 | default: |
| 2441 | res = -EINVAL; |
| 2442 | } |
| 2443 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2444 | release_sock(sk); |
| 2445 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2446 | if (res) |
| 2447 | return res; /* "get" failed */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2448 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2449 | if (len < sizeof(value)) |
| 2450 | return -EINVAL; |
| 2451 | |
| 2452 | if (copy_to_user(ov, &value, sizeof(value))) |
| 2453 | return -EFAULT; |
| 2454 | |
| 2455 | return put_user(sizeof(value), ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2456 | } |
| 2457 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2458 | static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2459 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2460 | struct sock *sk = sock->sk; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2461 | struct tipc_sioc_ln_req lnr; |
| 2462 | void __user *argp = (void __user *)arg; |
| 2463 | |
| 2464 | switch (cmd) { |
| 2465 | case SIOCGETLINKNAME: |
| 2466 | if (copy_from_user(&lnr, argp, sizeof(lnr))) |
| 2467 | return -EFAULT; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2468 | if (!tipc_node_get_linkname(sock_net(sk), |
| 2469 | lnr.bearer_id & 0xffff, lnr.peer, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2470 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
| 2471 | if (copy_to_user(argp, &lnr, sizeof(lnr))) |
| 2472 | return -EFAULT; |
| 2473 | return 0; |
| 2474 | } |
| 2475 | return -EADDRNOTAVAIL; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2476 | default: |
| 2477 | return -ENOIOCTLCMD; |
| 2478 | } |
| 2479 | } |
| 2480 | |
Ben Hutchings | ae86b9e | 2012-07-10 10:55:35 +0000 | [diff] [blame] | 2481 | /* Protocol switches for the various types of TIPC sockets */ |
| 2482 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2483 | static const struct proto_ops msg_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2484 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2485 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2486 | .release = tipc_release, |
| 2487 | .bind = tipc_bind, |
| 2488 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2489 | .socketpair = sock_no_socketpair, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2490 | .accept = sock_no_accept, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2491 | .getname = tipc_getname, |
| 2492 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2493 | .ioctl = tipc_ioctl, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2494 | .listen = sock_no_listen, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2495 | .shutdown = tipc_shutdown, |
| 2496 | .setsockopt = tipc_setsockopt, |
| 2497 | .getsockopt = tipc_getsockopt, |
| 2498 | .sendmsg = tipc_sendmsg, |
| 2499 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2500 | .mmap = sock_no_mmap, |
| 2501 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2502 | }; |
| 2503 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2504 | static const struct proto_ops packet_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2505 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2506 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2507 | .release = tipc_release, |
| 2508 | .bind = tipc_bind, |
| 2509 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2510 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2511 | .accept = tipc_accept, |
| 2512 | .getname = tipc_getname, |
| 2513 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2514 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2515 | .listen = tipc_listen, |
| 2516 | .shutdown = tipc_shutdown, |
| 2517 | .setsockopt = tipc_setsockopt, |
| 2518 | .getsockopt = tipc_getsockopt, |
| 2519 | .sendmsg = tipc_send_packet, |
| 2520 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2521 | .mmap = sock_no_mmap, |
| 2522 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2523 | }; |
| 2524 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2525 | static const struct proto_ops stream_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2526 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2527 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2528 | .release = tipc_release, |
| 2529 | .bind = tipc_bind, |
| 2530 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2531 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2532 | .accept = tipc_accept, |
| 2533 | .getname = tipc_getname, |
| 2534 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2535 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2536 | .listen = tipc_listen, |
| 2537 | .shutdown = tipc_shutdown, |
| 2538 | .setsockopt = tipc_setsockopt, |
| 2539 | .getsockopt = tipc_getsockopt, |
| 2540 | .sendmsg = tipc_send_stream, |
| 2541 | .recvmsg = tipc_recv_stream, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2542 | .mmap = sock_no_mmap, |
| 2543 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2544 | }; |
| 2545 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2546 | static const struct net_proto_family tipc_family_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2547 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2548 | .family = AF_TIPC, |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2549 | .create = tipc_sk_create |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2550 | }; |
| 2551 | |
| 2552 | static struct proto tipc_proto = { |
| 2553 | .name = "TIPC", |
| 2554 | .owner = THIS_MODULE, |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 2555 | .obj_size = sizeof(struct tipc_sock), |
| 2556 | .sysctl_rmem = sysctl_tipc_rmem |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2557 | }; |
| 2558 | |
| 2559 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2560 | * tipc_socket_init - initialize TIPC socket interface |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2561 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2562 | * Returns 0 on success, errno otherwise |
| 2563 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2564 | int tipc_socket_init(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2565 | { |
| 2566 | int res; |
| 2567 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2568 | res = proto_register(&tipc_proto, 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2569 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2570 | pr_err("Failed to register TIPC protocol type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2571 | goto out; |
| 2572 | } |
| 2573 | |
| 2574 | res = sock_register(&tipc_family_ops); |
| 2575 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2576 | pr_err("Failed to register TIPC socket type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2577 | proto_unregister(&tipc_proto); |
| 2578 | goto out; |
| 2579 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2580 | out: |
| 2581 | return res; |
| 2582 | } |
| 2583 | |
| 2584 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2585 | * tipc_socket_stop - stop TIPC socket interface |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2586 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2587 | void tipc_socket_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2588 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2589 | sock_unregister(tipc_family_ops.family); |
| 2590 | proto_unregister(&tipc_proto); |
| 2591 | } |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2592 | |
| 2593 | /* Caller should hold socket lock for the passed tipc socket. */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 2594 | static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2595 | { |
| 2596 | u32 peer_node; |
| 2597 | u32 peer_port; |
| 2598 | struct nlattr *nest; |
| 2599 | |
| 2600 | peer_node = tsk_peer_node(tsk); |
| 2601 | peer_port = tsk_peer_port(tsk); |
| 2602 | |
| 2603 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); |
| 2604 | |
| 2605 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) |
| 2606 | goto msg_full; |
| 2607 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) |
| 2608 | goto msg_full; |
| 2609 | |
| 2610 | if (tsk->conn_type != 0) { |
| 2611 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) |
| 2612 | goto msg_full; |
| 2613 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) |
| 2614 | goto msg_full; |
| 2615 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) |
| 2616 | goto msg_full; |
| 2617 | } |
| 2618 | nla_nest_end(skb, nest); |
| 2619 | |
| 2620 | return 0; |
| 2621 | |
| 2622 | msg_full: |
| 2623 | nla_nest_cancel(skb, nest); |
| 2624 | |
| 2625 | return -EMSGSIZE; |
| 2626 | } |
| 2627 | |
| 2628 | /* Caller should hold socket lock for the passed tipc socket. */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 2629 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
| 2630 | struct tipc_sock *tsk) |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2631 | { |
| 2632 | int err; |
| 2633 | void *hdr; |
| 2634 | struct nlattr *attrs; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2635 | struct net *net = sock_net(skb->sk); |
| 2636 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2637 | |
| 2638 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
Richard Alpe | bfb3e5d | 2015-02-09 09:50:03 +0100 | [diff] [blame] | 2639 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2640 | if (!hdr) |
| 2641 | goto msg_cancel; |
| 2642 | |
| 2643 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); |
| 2644 | if (!attrs) |
| 2645 | goto genlmsg_cancel; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2646 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2647 | goto attr_msg_cancel; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2648 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2649 | goto attr_msg_cancel; |
| 2650 | |
| 2651 | if (tsk->connected) { |
| 2652 | err = __tipc_nl_add_sk_con(skb, tsk); |
| 2653 | if (err) |
| 2654 | goto attr_msg_cancel; |
| 2655 | } else if (!list_empty(&tsk->publications)) { |
| 2656 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) |
| 2657 | goto attr_msg_cancel; |
| 2658 | } |
| 2659 | nla_nest_end(skb, attrs); |
| 2660 | genlmsg_end(skb, hdr); |
| 2661 | |
| 2662 | return 0; |
| 2663 | |
| 2664 | attr_msg_cancel: |
| 2665 | nla_nest_cancel(skb, attrs); |
| 2666 | genlmsg_cancel: |
| 2667 | genlmsg_cancel(skb, hdr); |
| 2668 | msg_cancel: |
| 2669 | return -EMSGSIZE; |
| 2670 | } |
| 2671 | |
| 2672 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 2673 | { |
| 2674 | int err; |
| 2675 | struct tipc_sock *tsk; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2676 | const struct bucket_table *tbl; |
| 2677 | struct rhash_head *pos; |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2678 | struct net *net = sock_net(skb->sk); |
| 2679 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2680 | u32 tbl_id = cb->args[0]; |
| 2681 | u32 prev_portid = cb->args[1]; |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2682 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2683 | rcu_read_lock(); |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2684 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2685 | for (; tbl_id < tbl->size; tbl_id++) { |
| 2686 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2687 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2688 | if (prev_portid && prev_portid != tsk->portid) { |
| 2689 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
| 2690 | continue; |
| 2691 | } |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2692 | |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2693 | err = __tipc_nl_add_sk(skb, cb, tsk); |
| 2694 | if (err) { |
| 2695 | prev_portid = tsk->portid; |
| 2696 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
| 2697 | goto out; |
| 2698 | } |
| 2699 | prev_portid = 0; |
| 2700 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2701 | } |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2702 | } |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2703 | out: |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2704 | rcu_read_unlock(); |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2705 | cb->args[0] = tbl_id; |
| 2706 | cb->args[1] = prev_portid; |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2707 | |
| 2708 | return skb->len; |
| 2709 | } |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2710 | |
| 2711 | /* Caller should hold socket lock for the passed tipc socket. */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 2712 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
| 2713 | struct netlink_callback *cb, |
| 2714 | struct publication *publ) |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2715 | { |
| 2716 | void *hdr; |
| 2717 | struct nlattr *attrs; |
| 2718 | |
| 2719 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
Richard Alpe | bfb3e5d | 2015-02-09 09:50:03 +0100 | [diff] [blame] | 2720 | &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2721 | if (!hdr) |
| 2722 | goto msg_cancel; |
| 2723 | |
| 2724 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); |
| 2725 | if (!attrs) |
| 2726 | goto genlmsg_cancel; |
| 2727 | |
| 2728 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) |
| 2729 | goto attr_msg_cancel; |
| 2730 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) |
| 2731 | goto attr_msg_cancel; |
| 2732 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) |
| 2733 | goto attr_msg_cancel; |
| 2734 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) |
| 2735 | goto attr_msg_cancel; |
| 2736 | |
| 2737 | nla_nest_end(skb, attrs); |
| 2738 | genlmsg_end(skb, hdr); |
| 2739 | |
| 2740 | return 0; |
| 2741 | |
| 2742 | attr_msg_cancel: |
| 2743 | nla_nest_cancel(skb, attrs); |
| 2744 | genlmsg_cancel: |
| 2745 | genlmsg_cancel(skb, hdr); |
| 2746 | msg_cancel: |
| 2747 | return -EMSGSIZE; |
| 2748 | } |
| 2749 | |
| 2750 | /* Caller should hold socket lock for the passed tipc socket. */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 2751 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
| 2752 | struct netlink_callback *cb, |
| 2753 | struct tipc_sock *tsk, u32 *last_publ) |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2754 | { |
| 2755 | int err; |
| 2756 | struct publication *p; |
| 2757 | |
| 2758 | if (*last_publ) { |
| 2759 | list_for_each_entry(p, &tsk->publications, pport_list) { |
| 2760 | if (p->key == *last_publ) |
| 2761 | break; |
| 2762 | } |
| 2763 | if (p->key != *last_publ) { |
| 2764 | /* We never set seq or call nl_dump_check_consistent() |
| 2765 | * this means that setting prev_seq here will cause the |
| 2766 | * consistence check to fail in the netlink callback |
| 2767 | * handler. Resulting in the last NLMSG_DONE message |
| 2768 | * having the NLM_F_DUMP_INTR flag set. |
| 2769 | */ |
| 2770 | cb->prev_seq = 1; |
| 2771 | *last_publ = 0; |
| 2772 | return -EPIPE; |
| 2773 | } |
| 2774 | } else { |
| 2775 | p = list_first_entry(&tsk->publications, struct publication, |
| 2776 | pport_list); |
| 2777 | } |
| 2778 | |
| 2779 | list_for_each_entry_from(p, &tsk->publications, pport_list) { |
| 2780 | err = __tipc_nl_add_sk_publ(skb, cb, p); |
| 2781 | if (err) { |
| 2782 | *last_publ = p->key; |
| 2783 | return err; |
| 2784 | } |
| 2785 | } |
| 2786 | *last_publ = 0; |
| 2787 | |
| 2788 | return 0; |
| 2789 | } |
| 2790 | |
| 2791 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 2792 | { |
| 2793 | int err; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2794 | u32 tsk_portid = cb->args[0]; |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2795 | u32 last_publ = cb->args[1]; |
| 2796 | u32 done = cb->args[2]; |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2797 | struct net *net = sock_net(skb->sk); |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2798 | struct tipc_sock *tsk; |
| 2799 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2800 | if (!tsk_portid) { |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2801 | struct nlattr **attrs; |
| 2802 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; |
| 2803 | |
| 2804 | err = tipc_nlmsg_parse(cb->nlh, &attrs); |
| 2805 | if (err) |
| 2806 | return err; |
| 2807 | |
| 2808 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
| 2809 | attrs[TIPC_NLA_SOCK], |
| 2810 | tipc_nl_sock_policy); |
| 2811 | if (err) |
| 2812 | return err; |
| 2813 | |
| 2814 | if (!sock[TIPC_NLA_SOCK_REF]) |
| 2815 | return -EINVAL; |
| 2816 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2817 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2818 | } |
| 2819 | |
| 2820 | if (done) |
| 2821 | return 0; |
| 2822 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2823 | tsk = tipc_sk_lookup(net, tsk_portid); |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2824 | if (!tsk) |
| 2825 | return -EINVAL; |
| 2826 | |
| 2827 | lock_sock(&tsk->sk); |
| 2828 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); |
| 2829 | if (!err) |
| 2830 | done = 1; |
| 2831 | release_sock(&tsk->sk); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2832 | sock_put(&tsk->sk); |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2833 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2834 | cb->args[0] = tsk_portid; |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2835 | cb->args[1] = last_publ; |
| 2836 | cb->args[2] = done; |
| 2837 | |
| 2838 | return skb->len; |
| 2839 | } |