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 | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 4 | * Copyright (c) 2001-2007, 2012-2014, 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> |
| 38 | #include <linux/jhash.h> |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "core.h" |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 40 | #include "name_table.h" |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 41 | #include "node.h" |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 42 | #include "link.h" |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 43 | #include "config.h" |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 44 | #include "name_distr.h" |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 45 | #include "socket.h" |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 46 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 47 | #define SS_LISTENING -1 /* socket is listening */ |
| 48 | #define SS_READY -2 /* socket is connectionless */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 49 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 50 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 51 | #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */ |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 52 | #define TIPC_FWD_MSG 1 |
| 53 | #define TIPC_CONN_OK 0 |
| 54 | #define TIPC_CONN_PROBING 1 |
| 55 | #define TIPC_MAX_PORT 0xffffffff |
| 56 | #define TIPC_MIN_PORT 1 |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 57 | |
| 58 | /** |
| 59 | * struct tipc_sock - TIPC socket structure |
| 60 | * @sk: socket - interacts with 'port' and with user via the socket API |
| 61 | * @connected: non-zero if port is currently connected to a peer port |
| 62 | * @conn_type: TIPC type used when connection was established |
| 63 | * @conn_instance: TIPC instance used when connection was established |
| 64 | * @published: non-zero if port has one or more associated names |
| 65 | * @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] | 66 | * @portid: unique port identity in TIPC socket hash table |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 67 | * @phdr: preformatted message header used when sending messages |
| 68 | * @port_list: adjacent ports in TIPC's global list of ports |
| 69 | * @publications: list of publications for port |
| 70 | * @pub_count: total # of publications port has made during its lifetime |
| 71 | * @probing_state: |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 72 | * @probing_intv: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 73 | * @conn_timeout: the time we can wait for an unresponded setup request |
| 74 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue |
| 75 | * @link_cong: non-zero if owner must sleep because of link congestion |
| 76 | * @sent_unacked: # messages sent by socket, and not yet acked by peer |
| 77 | * @rcv_unacked: # messages read by user, but not yet acked back to peer |
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; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 100 | struct rhash_head node; |
| 101 | struct rcu_head rcu; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 102 | }; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 103 | |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 104 | 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] | 105 | static void tipc_data_ready(struct sock *sk); |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 106 | static void tipc_write_space(struct sock *sk); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 107 | static int tipc_release(struct socket *sock); |
| 108 | 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] | 109 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 110 | static void tipc_sk_timeout(unsigned long data); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 111 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 112 | struct tipc_name_seq const *seq); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 113 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 114 | struct tipc_name_seq const *seq); |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 115 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 116 | static int tipc_sk_insert(struct tipc_sock *tsk); |
| 117 | static void tipc_sk_remove(struct tipc_sock *tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 118 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 119 | static const struct proto_ops packet_ops; |
| 120 | static const struct proto_ops stream_ops; |
| 121 | static const struct proto_ops msg_ops; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 122 | |
| 123 | static struct proto tipc_proto; |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 124 | static struct proto tipc_proto_kern; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 125 | |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 126 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
| 127 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, |
| 128 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, |
| 129 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, |
| 130 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, |
| 131 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } |
| 132 | }; |
| 133 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 134 | /* |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 135 | * Revised TIPC socket locking policy: |
| 136 | * |
| 137 | * Most socket operations take the standard socket lock when they start |
| 138 | * and hold it until they finish (or until they need to sleep). Acquiring |
| 139 | * this lock grants the owner exclusive access to the fields of the socket |
| 140 | * data structures, with the exception of the backlog queue. A few socket |
| 141 | * operations can be done without taking the socket lock because they only |
| 142 | * read socket information that never changes during the life of the socket. |
| 143 | * |
| 144 | * Socket operations may acquire the lock for the associated TIPC port if they |
| 145 | * need to perform an operation on the port. If any routine needs to acquire |
| 146 | * both the socket lock and the port lock it must take the socket lock first |
| 147 | * to avoid the risk of deadlock. |
| 148 | * |
| 149 | * The dispatcher handling incoming messages cannot grab the socket lock in |
| 150 | * the standard fashion, since invoked it runs at the BH level and cannot block. |
| 151 | * Instead, it checks to see if the socket lock is currently owned by someone, |
| 152 | * and either handles the message itself or adds it to the socket's backlog |
| 153 | * queue; in the latter case the queued message is processed once the process |
| 154 | * owning the socket lock releases it. |
| 155 | * |
| 156 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes |
| 157 | * the problem of a blocked socket operation preventing any other operations |
| 158 | * from occurring. However, applications must be careful if they have |
| 159 | * multiple threads trying to send (or receive) on the same socket, as these |
| 160 | * operations might interfere with each other. For example, doing a connect |
| 161 | * and a receive at the same time might allow the receive to consume the |
| 162 | * ACK message meant for the connect. While additional work could be done |
| 163 | * to try and overcome this, it doesn't seem to be worthwhile at the present. |
| 164 | * |
| 165 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures |
| 166 | * that another operation that must be performed in a non-blocking manner is |
| 167 | * not delayed for very long because the lock has already been taken. |
| 168 | * |
| 169 | * NOTE: This code assumes that certain fields of a port/socket pair are |
| 170 | * constant over its lifetime; such fields can be examined without taking |
| 171 | * the socket lock and/or port lock, and do not need to be re-read even |
| 172 | * after resuming processing after waiting. These fields include: |
| 173 | * - socket type |
| 174 | * - pointer to socket sk structure (aka tipc_sock structure) |
| 175 | * - pointer to port structure |
| 176 | * - port reference |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 177 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 178 | |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 179 | static u32 tsk_own_node(struct tipc_sock *tsk) |
| 180 | { |
| 181 | return msg_prevnode(&tsk->phdr); |
| 182 | } |
| 183 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 184 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 185 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 186 | return msg_destnode(&tsk->phdr); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 187 | } |
| 188 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 189 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 190 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 191 | return msg_destport(&tsk->phdr); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 192 | } |
| 193 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 194 | static bool tsk_unreliable(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 195 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 196 | return msg_src_droppable(&tsk->phdr) != 0; |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 197 | } |
| 198 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 199 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 200 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 201 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 202 | } |
| 203 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 204 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 205 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 206 | return msg_dest_droppable(&tsk->phdr) != 0; |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 207 | } |
| 208 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 209 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 210 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 211 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 212 | } |
| 213 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 214 | static int tsk_importance(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 215 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 216 | return msg_importance(&tsk->phdr); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 217 | } |
| 218 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 219 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 220 | { |
| 221 | if (imp > TIPC_CRITICAL_IMPORTANCE) |
| 222 | return -EINVAL; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 223 | msg_set_importance(&tsk->phdr, (u32)imp); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 224 | return 0; |
| 225 | } |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 226 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 227 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
| 228 | { |
| 229 | return container_of(sk, struct tipc_sock, sk); |
| 230 | } |
| 231 | |
| 232 | static int tsk_conn_cong(struct tipc_sock *tsk) |
| 233 | { |
| 234 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; |
| 235 | } |
| 236 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 237 | /** |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 238 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 239 | * |
| 240 | * Caller must hold socket lock |
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 | static void tsk_advance_rx_queue(struct sock *sk) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 243 | { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 244 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | /** |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 248 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 249 | * |
| 250 | * Caller must hold socket lock |
| 251 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 252 | static void tsk_rej_rx_queue(struct sock *sk) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 253 | { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 254 | struct sk_buff *skb; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 255 | u32 dnode; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 256 | u32 own_node = tsk_own_node(tipc_sk(sk)); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 257 | |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 258 | while ((skb = __skb_dequeue(&sk->sk_receive_queue))) { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 259 | if (tipc_msg_reverse(own_node, skb, &dnode, TIPC_ERR_NO_PORT)) |
| 260 | tipc_link_xmit_skb(sock_net(sk), skb, dnode, 0); |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 261 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 262 | } |
| 263 | |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 264 | /* 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] | 265 | * |
| 266 | * Handles cases where the node's network address has changed from |
| 267 | * the default of <0.0.0> to its configured setting. |
| 268 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 269 | 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] | 270 | { |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 271 | 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] | 272 | u32 peer_port = tsk_peer_port(tsk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 273 | u32 orig_node; |
| 274 | u32 peer_node; |
| 275 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 276 | if (unlikely(!tsk->connected)) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 277 | return false; |
| 278 | |
| 279 | if (unlikely(msg_origport(msg) != peer_port)) |
| 280 | return false; |
| 281 | |
| 282 | orig_node = msg_orignode(msg); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 283 | peer_node = tsk_peer_node(tsk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 284 | |
| 285 | if (likely(orig_node == peer_node)) |
| 286 | return true; |
| 287 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 288 | if (!orig_node && (peer_node == tn->own_addr)) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 289 | return true; |
| 290 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 291 | if (!peer_node && (orig_node == tn->own_addr)) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 292 | return true; |
| 293 | |
| 294 | return false; |
| 295 | } |
| 296 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 297 | /** |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 298 | * tipc_sk_create - create a TIPC socket |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 299 | * @net: network namespace (must be default network) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 300 | * @sock: pre-allocated socket structure |
| 301 | * @protocol: protocol indicator (must be 0) |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 302 | * @kern: caused by kernel or by userspace? |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 303 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 304 | * This routine creates additional data structures used by the TIPC socket, |
| 305 | * initializes them, and links them together. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 306 | * |
| 307 | * Returns 0 on success, errno otherwise |
| 308 | */ |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 309 | static int tipc_sk_create(struct net *net, struct socket *sock, |
| 310 | int protocol, int kern) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 311 | { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 312 | struct tipc_net *tn; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 313 | const struct proto_ops *ops; |
| 314 | socket_state state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 315 | struct sock *sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 316 | struct tipc_sock *tsk; |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 317 | struct tipc_msg *msg; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 318 | |
| 319 | /* Validate arguments */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 320 | if (unlikely(protocol != 0)) |
| 321 | return -EPROTONOSUPPORT; |
| 322 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 323 | switch (sock->type) { |
| 324 | case SOCK_STREAM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 325 | ops = &stream_ops; |
| 326 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 327 | break; |
| 328 | case SOCK_SEQPACKET: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 329 | ops = &packet_ops; |
| 330 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 331 | break; |
| 332 | case SOCK_DGRAM: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 333 | case SOCK_RDM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 334 | ops = &msg_ops; |
| 335 | state = SS_READY; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 336 | break; |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 337 | default: |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 338 | return -EPROTOTYPE; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 339 | } |
| 340 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 341 | /* Allocate socket's protocol area */ |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 342 | if (!kern) |
| 343 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); |
| 344 | else |
| 345 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); |
| 346 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 347 | if (sk == NULL) |
| 348 | return -ENOMEM; |
| 349 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 350 | tsk = tipc_sk(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 351 | tsk->max_pkt = MAX_PKT_DEFAULT; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 352 | INIT_LIST_HEAD(&tsk->publications); |
| 353 | msg = &tsk->phdr; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 354 | tn = net_generic(sock_net(sk), tipc_net_id); |
| 355 | tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 356 | NAMED_H_SIZE, 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 357 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 358 | /* Finish initializing socket data structures */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 359 | sock->ops = ops; |
| 360 | sock->state = state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 361 | sock_init_data(sock, sk); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 362 | if (tipc_sk_insert(tsk)) { |
| 363 | pr_warn("Socket create failed; port numbrer exhausted\n"); |
| 364 | return -EINVAL; |
| 365 | } |
| 366 | msg_set_origport(msg, tsk->portid); |
Ying Xue | 3721e9c | 2015-01-13 17:07:48 +0800 | [diff] [blame] | 367 | setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 368 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 369 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 370 | sk->sk_data_ready = tipc_data_ready; |
| 371 | sk->sk_write_space = tipc_write_space; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 372 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 373 | tsk->sent_unacked = 0; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 374 | atomic_set(&tsk->dupl_rcvcnt, 0); |
Allan Stephens | 7ef43eb | 2008-05-12 15:42:28 -0700 | [diff] [blame] | 375 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 376 | if (sock->state == SS_READY) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 377 | tsk_set_unreturnable(tsk, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 378 | if (sock->type == SOCK_DGRAM) |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 379 | tsk_set_unreliable(tsk, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 380 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | /** |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 385 | * tipc_sock_create_local - create TIPC socket from inside TIPC module |
| 386 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET |
| 387 | * |
| 388 | * We cannot use sock_creat_kern here because it bumps module user count. |
| 389 | * Since socket owner and creator is the same module we must make sure |
| 390 | * that module count remains zero for module local sockets, otherwise |
| 391 | * we cannot do rmmod. |
| 392 | * |
| 393 | * Returns 0 on success, errno otherwise |
| 394 | */ |
Ying Xue | a62fbcc | 2015-01-09 15:27:11 +0800 | [diff] [blame] | 395 | int tipc_sock_create_local(struct net *net, int type, struct socket **res) |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 396 | { |
| 397 | int rc; |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 398 | |
| 399 | rc = sock_create_lite(AF_TIPC, type, 0, res); |
| 400 | if (rc < 0) { |
| 401 | pr_err("Failed to create kernel socket\n"); |
| 402 | return rc; |
| 403 | } |
Ying Xue | a62fbcc | 2015-01-09 15:27:11 +0800 | [diff] [blame] | 404 | tipc_sk_create(net, *res, 0, 1); |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 405 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * tipc_sock_release_local - release socket created by tipc_sock_create_local |
| 411 | * @sock: the socket to be released. |
| 412 | * |
| 413 | * Module reference count is not incremented when such sockets are created, |
| 414 | * so we must keep it from being decremented when they are released. |
| 415 | */ |
| 416 | void tipc_sock_release_local(struct socket *sock) |
| 417 | { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 418 | tipc_release(sock); |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 419 | sock->ops = NULL; |
| 420 | sock_release(sock); |
| 421 | } |
| 422 | |
| 423 | /** |
| 424 | * tipc_sock_accept_local - accept a connection on a socket created |
| 425 | * with tipc_sock_create_local. Use this function to avoid that |
| 426 | * module reference count is inadvertently incremented. |
| 427 | * |
| 428 | * @sock: the accepting socket |
| 429 | * @newsock: reference to the new socket to be created |
| 430 | * @flags: socket flags |
| 431 | */ |
| 432 | |
| 433 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 434 | int flags) |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 435 | { |
| 436 | struct sock *sk = sock->sk; |
| 437 | int ret; |
| 438 | |
| 439 | ret = sock_create_lite(sk->sk_family, sk->sk_type, |
| 440 | sk->sk_protocol, newsock); |
| 441 | if (ret < 0) |
| 442 | return ret; |
| 443 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 444 | ret = tipc_accept(sock, *newsock, flags); |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 445 | if (ret < 0) { |
| 446 | sock_release(*newsock); |
| 447 | return ret; |
| 448 | } |
| 449 | (*newsock)->ops = sock->ops; |
| 450 | return ret; |
| 451 | } |
| 452 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 453 | static void tipc_sk_callback(struct rcu_head *head) |
| 454 | { |
| 455 | struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu); |
| 456 | |
| 457 | sock_put(&tsk->sk); |
| 458 | } |
| 459 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 460 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 461 | * tipc_release - destroy a TIPC socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 462 | * @sock: socket to destroy |
| 463 | * |
| 464 | * This routine cleans up any messages that are still queued on the socket. |
| 465 | * For DGRAM and RDM socket types, all queued messages are rejected. |
| 466 | * For SEQPACKET and STREAM socket types, the first message is rejected |
| 467 | * and any others are discarded. (If the first message on a STREAM socket |
| 468 | * 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] | 469 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 470 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
| 471 | * are returned or discarded according to the "destination droppable" setting |
| 472 | * specified for the message by the sender. |
| 473 | * |
| 474 | * Returns 0 on success, errno otherwise |
| 475 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 476 | static int tipc_release(struct socket *sock) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 477 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 478 | struct sock *sk = sock->sk; |
Sasha Levin | 357c477 | 2015-01-13 12:46:41 -0500 | [diff] [blame] | 479 | struct net *net; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 480 | struct tipc_sock *tsk; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 481 | struct sk_buff *skb; |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 482 | u32 dnode, probing_state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 483 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 484 | /* |
| 485 | * Exit if socket isn't fully initialized (occurs when a failed accept() |
| 486 | * releases a pre-allocated child socket that was never used) |
| 487 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 488 | if (sk == NULL) |
| 489 | return 0; |
| 490 | |
Sasha Levin | 357c477 | 2015-01-13 12:46:41 -0500 | [diff] [blame] | 491 | net = sock_net(sk); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 492 | tsk = tipc_sk(sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 493 | lock_sock(sk); |
| 494 | |
| 495 | /* |
| 496 | * Reject all unreceived messages, except on an active connection |
| 497 | * (which disconnects locally & sends a 'FIN+' to peer) |
| 498 | */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 499 | dnode = tsk_peer_node(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 500 | while (sock->state != SS_DISCONNECTING) { |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 501 | skb = __skb_dequeue(&sk->sk_receive_queue); |
| 502 | if (skb == NULL) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 503 | break; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 504 | if (TIPC_SKB_CB(skb)->handle != NULL) |
| 505 | kfree_skb(skb); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 506 | else { |
| 507 | if ((sock->state == SS_CONNECTING) || |
| 508 | (sock->state == SS_CONNECTED)) { |
| 509 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 510 | tsk->connected = 0; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 511 | tipc_node_remove_conn(net, dnode, tsk->portid); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 512 | } |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 513 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 514 | TIPC_ERR_NO_PORT)) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 515 | tipc_link_xmit_skb(net, skb, dnode, 0); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 516 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 517 | } |
| 518 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 519 | tipc_sk_withdraw(tsk, 0, NULL); |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 520 | probing_state = tsk->probing_state; |
Ying Xue | 3721e9c | 2015-01-13 17:07:48 +0800 | [diff] [blame] | 521 | if (del_timer_sync(&sk->sk_timer) && |
| 522 | probing_state != TIPC_CONN_PROBING) |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 523 | sock_put(sk); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 524 | tipc_sk_remove(tsk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 525 | if (tsk->connected) { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 526 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 527 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode, |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 528 | tsk_own_node(tsk), tsk_peer_port(tsk), |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 529 | tsk->portid, TIPC_ERR_NO_PORT); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 530 | if (skb) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 531 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
| 532 | tipc_node_remove_conn(net, dnode, tsk->portid); |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 533 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 534 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 535 | /* Discard any remaining (connection-based) messages in receive queue */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 536 | __skb_queue_purge(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 537 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 538 | /* Reject any messages that accumulated in backlog queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 539 | sock->state = SS_DISCONNECTING; |
| 540 | release_sock(sk); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 541 | |
| 542 | call_rcu(&tsk->rcu, tipc_sk_callback); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 543 | sock->sk = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 544 | |
Geert Uytterhoeven | 065d7e3 | 2014-04-06 15:56:14 +0200 | [diff] [blame] | 545 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 549 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 550 | * @sock: socket structure |
| 551 | * @uaddr: socket address describing name(s) and desired operation |
| 552 | * @uaddr_len: size of socket address data structure |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 553 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 554 | * Name and name sequence binding is indicated using a positive scope value; |
| 555 | * a negative scope value unbinds the specified name. Specifying no name |
| 556 | * (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] | 557 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 558 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 559 | * |
| 560 | * NOTE: This routine doesn't need to take the socket lock since it doesn't |
| 561 | * access any non-constant socket information. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 562 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 563 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
| 564 | int uaddr_len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 565 | { |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 566 | struct sock *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 567 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 568 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 569 | int res = -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 570 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 571 | lock_sock(sk); |
| 572 | if (unlikely(!uaddr_len)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 573 | res = tipc_sk_withdraw(tsk, 0, NULL); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 574 | goto exit; |
| 575 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 576 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 577 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
| 578 | res = -EINVAL; |
| 579 | goto exit; |
| 580 | } |
| 581 | if (addr->family != AF_TIPC) { |
| 582 | res = -EAFNOSUPPORT; |
| 583 | goto exit; |
| 584 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 585 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 586 | if (addr->addrtype == TIPC_ADDR_NAME) |
| 587 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 588 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
| 589 | res = -EAFNOSUPPORT; |
| 590 | goto exit; |
| 591 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 592 | |
Ying Xue | 13a2e89 | 2013-06-17 10:54:40 -0400 | [diff] [blame] | 593 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
Ying Xue | 7d0ab17 | 2013-06-17 10:54:41 -0400 | [diff] [blame] | 594 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 595 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
| 596 | res = -EACCES; |
| 597 | goto exit; |
| 598 | } |
Allan Stephens | c422f1b | 2011-11-02 15:49:40 -0400 | [diff] [blame] | 599 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 600 | res = (addr->scope > 0) ? |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 601 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
| 602 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 603 | exit: |
| 604 | release_sock(sk); |
| 605 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 606 | } |
| 607 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 608 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 609 | * tipc_getname - get port ID of socket or peer socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 610 | * @sock: socket structure |
| 611 | * @uaddr: area for returned socket address |
| 612 | * @uaddr_len: area for returned length of socket address |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 613 | * @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] | 614 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 615 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 616 | * |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 617 | * NOTE: This routine doesn't need to take the socket lock since it only |
| 618 | * accesses socket information that is unchanging (or which changes in |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 619 | * a completely predictable manner). |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 620 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 621 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
| 622 | int *uaddr_len, int peer) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 623 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 624 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 625 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 626 | 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] | 627 | |
Kulikov Vasiliy | 88f8a5e | 2010-10-31 07:10:32 +0000 | [diff] [blame] | 628 | memset(addr, 0, sizeof(*addr)); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 629 | if (peer) { |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 630 | if ((sock->state != SS_CONNECTED) && |
| 631 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) |
| 632 | return -ENOTCONN; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 633 | addr->addr.id.ref = tsk_peer_port(tsk); |
| 634 | addr->addr.id.node = tsk_peer_node(tsk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 635 | } else { |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 636 | addr->addr.id.ref = tsk->portid; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 637 | addr->addr.id.node = tn->own_addr; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 638 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 639 | |
| 640 | *uaddr_len = sizeof(*addr); |
| 641 | addr->addrtype = TIPC_ADDR_ID; |
| 642 | addr->family = AF_TIPC; |
| 643 | addr->scope = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 644 | addr->addr.name.domain = 0; |
| 645 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 646 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 650 | * tipc_poll - read and possibly block on pollmask |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 651 | * @file: file structure associated with the socket |
| 652 | * @sock: socket for which to calculate the poll bits |
| 653 | * @wait: ??? |
| 654 | * |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 655 | * Returns pollmask value |
| 656 | * |
| 657 | * COMMENTARY: |
| 658 | * It appears that the usual socket locking mechanisms are not useful here |
| 659 | * since the pollmask info is potentially out-of-date the moment this routine |
| 660 | * exits. TCP and other protocols seem to rely on higher level poll routines |
| 661 | * to handle any preventable race conditions, so TIPC will do the same ... |
| 662 | * |
| 663 | * TIPC sets the returned events as follows: |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 664 | * |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 665 | * socket state flags set |
| 666 | * ------------ --------- |
| 667 | * unconnected no read flags |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 668 | * POLLOUT if port is not congested |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 669 | * |
| 670 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue |
| 671 | * no write flags |
| 672 | * |
| 673 | * connected POLLIN/POLLRDNORM if data in rx queue |
| 674 | * POLLOUT if port is not congested |
| 675 | * |
| 676 | * disconnecting POLLIN/POLLRDNORM/POLLHUP |
| 677 | * no write flags |
| 678 | * |
| 679 | * listening POLLIN if SYN in rx queue |
| 680 | * no write flags |
| 681 | * |
| 682 | * ready POLLIN/POLLRDNORM if data in rx queue |
| 683 | * [connectionless] POLLOUT (since port cannot be congested) |
| 684 | * |
| 685 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
| 686 | * imply that the operation will succeed, merely that it should be performed |
| 687 | * and will not block. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 688 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 689 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
| 690 | poll_table *wait) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 691 | { |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 692 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 693 | struct tipc_sock *tsk = tipc_sk(sk); |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 694 | u32 mask = 0; |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 695 | |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 696 | sock_poll_wait(file, sk_sleep(sk), wait); |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 697 | |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 698 | switch ((int)sock->state) { |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 699 | case SS_UNCONNECTED: |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 700 | if (!tsk->link_cong) |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 701 | mask |= POLLOUT; |
| 702 | break; |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 703 | case SS_READY: |
| 704 | case SS_CONNECTED: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 705 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 706 | mask |= POLLOUT; |
| 707 | /* fall thru' */ |
| 708 | case SS_CONNECTING: |
| 709 | case SS_LISTENING: |
| 710 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 711 | mask |= (POLLIN | POLLRDNORM); |
| 712 | break; |
| 713 | case SS_DISCONNECTING: |
| 714 | mask = (POLLIN | POLLRDNORM | POLLHUP); |
| 715 | break; |
| 716 | } |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 717 | |
| 718 | return mask; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 719 | } |
| 720 | |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 721 | /** |
| 722 | * tipc_sendmcast - send multicast message |
| 723 | * @sock: socket structure |
| 724 | * @seq: destination address |
Al Viro | 562640f | 2014-11-15 01:13:43 -0500 | [diff] [blame] | 725 | * @msg: message to send |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 726 | * @dsz: total length of message data |
| 727 | * @timeo: timeout to wait for wakeup |
| 728 | * |
| 729 | * Called from function tipc_sendmsg(), which has done all sanity checks |
| 730 | * Returns the number of bytes sent on success, or errno |
| 731 | */ |
| 732 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, |
Al Viro | 562640f | 2014-11-15 01:13:43 -0500 | [diff] [blame] | 733 | struct msghdr *msg, size_t dsz, long timeo) |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 734 | { |
| 735 | struct sock *sk = sock->sk; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 736 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 737 | struct net *net = sock_net(sk); |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 738 | struct tipc_msg *mhdr = &tsk->phdr; |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 739 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 740 | struct iov_iter save = msg->msg_iter; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 741 | uint mtu; |
| 742 | int rc; |
| 743 | |
| 744 | msg_set_type(mhdr, TIPC_MCAST_MSG); |
| 745 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); |
| 746 | msg_set_destport(mhdr, 0); |
| 747 | msg_set_destnode(mhdr, 0); |
| 748 | msg_set_nametype(mhdr, seq->type); |
| 749 | msg_set_namelower(mhdr, seq->lower); |
| 750 | msg_set_nameupper(mhdr, seq->upper); |
| 751 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); |
| 752 | |
| 753 | new_mtu: |
| 754 | mtu = tipc_bclink_get_mtu(); |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 755 | rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, pktchain); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 756 | if (unlikely(rc < 0)) |
| 757 | return rc; |
| 758 | |
| 759 | do { |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 760 | rc = tipc_bclink_xmit(net, pktchain); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 761 | if (likely(rc >= 0)) { |
| 762 | rc = dsz; |
| 763 | break; |
| 764 | } |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 765 | if (rc == -EMSGSIZE) { |
| 766 | msg->msg_iter = save; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 767 | goto new_mtu; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 768 | } |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 769 | if (rc != -ELINKCONG) |
| 770 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 771 | tipc_sk(sk)->link_cong = 1; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 772 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
| 773 | if (rc) |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 774 | __skb_queue_purge(pktchain); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 775 | } while (!rc); |
| 776 | return rc; |
| 777 | } |
| 778 | |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 779 | /* tipc_sk_mcast_rcv - Deliver multicast message to all destination sockets |
| 780 | */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 781 | void tipc_sk_mcast_rcv(struct net *net, struct sk_buff *buf) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 782 | { |
| 783 | struct tipc_msg *msg = buf_msg(buf); |
| 784 | struct tipc_port_list dports = {0, NULL, }; |
| 785 | struct tipc_port_list *item; |
| 786 | struct sk_buff *b; |
| 787 | uint i, last, dst = 0; |
| 788 | u32 scope = TIPC_CLUSTER_SCOPE; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 789 | struct sk_buff_head msgs; |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 790 | |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 791 | if (in_own_node(net, msg_orignode(msg))) |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 792 | scope = TIPC_NODE_SCOPE; |
| 793 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 794 | if (unlikely(!msg_mcast(msg))) { |
| 795 | pr_warn("Received non-multicast msg in multicast\n"); |
| 796 | kfree_skb(buf); |
| 797 | goto exit; |
| 798 | } |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 799 | /* Create destination port list: */ |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame] | 800 | tipc_nametbl_mc_translate(net, msg_nametype(msg), msg_namelower(msg), |
| 801 | msg_nameupper(msg), scope, &dports); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 802 | last = dports.count; |
| 803 | if (!last) { |
| 804 | kfree_skb(buf); |
| 805 | return; |
| 806 | } |
| 807 | |
| 808 | for (item = &dports; item; item = item->next) { |
| 809 | for (i = 0; i < PLSIZE && ++dst <= last; i++) { |
| 810 | b = (dst != last) ? skb_clone(buf, GFP_ATOMIC) : buf; |
| 811 | if (!b) { |
| 812 | pr_warn("Failed do clone mcast rcv buffer\n"); |
| 813 | continue; |
| 814 | } |
| 815 | msg_set_destport(msg, item->ports[i]); |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 816 | skb_queue_head_init(&msgs); |
| 817 | skb_queue_tail(&msgs, b); |
| 818 | tipc_sk_rcv(net, &msgs); |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 819 | } |
| 820 | } |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 821 | exit: |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 822 | tipc_port_list_free(&dports); |
| 823 | } |
| 824 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 825 | /** |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 826 | * tipc_sk_proto_rcv - receive a connection mng protocol message |
| 827 | * @tsk: receiving socket |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 828 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed. |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 829 | */ |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 830 | 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] | 831 | { |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 832 | struct tipc_msg *msg = buf_msg(*skb); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 833 | int conn_cong; |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 834 | u32 dnode; |
| 835 | u32 own_node = tsk_own_node(tsk); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 836 | /* Ignore if connection cannot be validated: */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 837 | if (!tsk_peer_msg(tsk, msg)) |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 838 | goto exit; |
| 839 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 840 | tsk->probing_state = TIPC_CONN_OK; |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 841 | |
| 842 | if (msg_type(msg) == CONN_ACK) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 843 | conn_cong = tsk_conn_cong(tsk); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 844 | tsk->sent_unacked -= msg_msgcnt(msg); |
| 845 | if (conn_cong) |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 846 | tsk->sk.sk_write_space(&tsk->sk); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 847 | } else if (msg_type(msg) == CONN_PROBE) { |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 848 | if (tipc_msg_reverse(own_node, *skb, &dnode, TIPC_OK)) { |
| 849 | msg_set_type(msg, CONN_PROBE_REPLY); |
| 850 | return; |
| 851 | } |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 852 | } |
| 853 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ |
| 854 | exit: |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 855 | kfree_skb(*skb); |
| 856 | *skb = NULL; |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 857 | } |
| 858 | |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 859 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
| 860 | { |
| 861 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 862 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 863 | DEFINE_WAIT(wait); |
| 864 | int done; |
| 865 | |
| 866 | do { |
| 867 | int err = sock_error(sk); |
| 868 | if (err) |
| 869 | return err; |
| 870 | if (sock->state == SS_DISCONNECTING) |
| 871 | return -EPIPE; |
| 872 | if (!*timeo_p) |
| 873 | return -EAGAIN; |
| 874 | if (signal_pending(current)) |
| 875 | return sock_intr_errno(*timeo_p); |
| 876 | |
| 877 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 878 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 879 | finish_wait(sk_sleep(sk), &wait); |
| 880 | } while (!done); |
| 881 | return 0; |
| 882 | } |
| 883 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 884 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 885 | * tipc_sendmsg - send message in connectionless manner |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 886 | * @iocb: if NULL, indicates that socket lock is already held |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 887 | * @sock: socket structure |
| 888 | * @m: message to send |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 889 | * @dsz: amount of user data to be sent |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 890 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 891 | * Message must have an destination specified explicitly. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 892 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 893 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
| 894 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 895 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 896 | * Returns the number of bytes sent on success, or errno otherwise |
| 897 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 898 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 899 | struct msghdr *m, size_t dsz) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 900 | { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 901 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 902 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 903 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 904 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 905 | struct tipc_msg *mhdr = &tsk->phdr; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 906 | u32 dnode, dport; |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 907 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 908 | struct sk_buff *skb; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 909 | struct tipc_name_seq *seq = &dest->addr.nameseq; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 910 | struct iov_iter save; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 911 | u32 mtu; |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 912 | long timeo; |
Erik Hugne | 88b17b6 | 2014-12-03 14:44:44 +0100 | [diff] [blame] | 913 | int rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 914 | |
| 915 | if (unlikely(!dest)) |
| 916 | return -EDESTADDRREQ; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 917 | |
Allan Stephens | 51f9cc1 | 2006-06-25 23:49:06 -0700 | [diff] [blame] | 918 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
| 919 | (dest->family != AF_TIPC))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 920 | return -EINVAL; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 921 | |
| 922 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
Allan Stephens | c29c3f7 | 2010-04-20 17:58:24 -0400 | [diff] [blame] | 923 | return -EMSGSIZE; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 924 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 925 | if (iocb) |
| 926 | lock_sock(sk); |
| 927 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 928 | if (unlikely(sock->state != SS_READY)) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 929 | if (sock->state == SS_LISTENING) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 930 | rc = -EPIPE; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 931 | goto exit; |
Allan Stephens | 3388007 | 2006-06-25 23:44:57 -0700 | [diff] [blame] | 932 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 933 | if (sock->state != SS_UNCONNECTED) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 934 | rc = -EISCONN; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 935 | goto exit; |
| 936 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 937 | if (tsk->published) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 938 | rc = -EOPNOTSUPP; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 939 | goto exit; |
| 940 | } |
| 941 | if (dest->addrtype == TIPC_ADDR_NAME) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 942 | tsk->conn_type = dest->addr.name.name.type; |
| 943 | tsk->conn_instance = dest->addr.name.name.instance; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 944 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 945 | } |
| 946 | |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 947 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 948 | |
| 949 | if (dest->addrtype == TIPC_ADDR_MCAST) { |
Al Viro | 562640f | 2014-11-15 01:13:43 -0500 | [diff] [blame] | 950 | rc = tipc_sendmcast(sock, seq, m, dsz, timeo); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 951 | goto exit; |
| 952 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
| 953 | u32 type = dest->addr.name.name.type; |
| 954 | u32 inst = dest->addr.name.name.instance; |
| 955 | u32 domain = dest->addr.name.domain; |
| 956 | |
| 957 | dnode = domain; |
| 958 | msg_set_type(mhdr, TIPC_NAMED_MSG); |
| 959 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); |
| 960 | msg_set_nametype(mhdr, type); |
| 961 | msg_set_nameinst(mhdr, inst); |
| 962 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); |
Ying Xue | 4ac1c8d | 2015-01-09 15:27:09 +0800 | [diff] [blame] | 963 | dport = tipc_nametbl_translate(net, type, inst, &dnode); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 964 | msg_set_destnode(mhdr, dnode); |
| 965 | msg_set_destport(mhdr, dport); |
| 966 | if (unlikely(!dport && !dnode)) { |
| 967 | rc = -EHOSTUNREACH; |
| 968 | goto exit; |
| 969 | } |
| 970 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
| 971 | dnode = dest->addr.id.node; |
| 972 | msg_set_type(mhdr, TIPC_DIRECT_MSG); |
| 973 | msg_set_lookup_scope(mhdr, 0); |
| 974 | msg_set_destnode(mhdr, dnode); |
| 975 | msg_set_destport(mhdr, dest->addr.id.ref); |
| 976 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); |
| 977 | } |
| 978 | |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 979 | save = m->msg_iter; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 980 | new_mtu: |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 981 | mtu = tipc_node_get_mtu(net, dnode, tsk->portid); |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 982 | rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, pktchain); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 983 | if (rc < 0) |
| 984 | goto exit; |
| 985 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 986 | do { |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 987 | skb = skb_peek(pktchain); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 988 | TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong; |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 989 | rc = tipc_link_xmit(net, pktchain, dnode, tsk->portid); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 990 | if (likely(rc >= 0)) { |
| 991 | if (sock->state != SS_READY) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 992 | sock->state = SS_CONNECTING; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 993 | rc = dsz; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 994 | break; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 995 | } |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 996 | if (rc == -EMSGSIZE) { |
| 997 | m->msg_iter = save; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 998 | goto new_mtu; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 999 | } |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 1000 | if (rc != -ELINKCONG) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1001 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1002 | tsk->link_cong = 1; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 1003 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
Erik Hugne | 70452dc | 2014-07-06 20:38:50 -0400 | [diff] [blame] | 1004 | if (rc) |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 1005 | __skb_queue_purge(pktchain); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 1006 | } while (!rc); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1007 | exit: |
| 1008 | if (iocb) |
| 1009 | release_sock(sk); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 1010 | |
| 1011 | return rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1012 | } |
| 1013 | |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 1014 | static int tipc_wait_for_sndpkt(struct socket *sock, long *timeo_p) |
| 1015 | { |
| 1016 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1017 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 1018 | DEFINE_WAIT(wait); |
| 1019 | int done; |
| 1020 | |
| 1021 | do { |
| 1022 | int err = sock_error(sk); |
| 1023 | if (err) |
| 1024 | return err; |
| 1025 | if (sock->state == SS_DISCONNECTING) |
| 1026 | return -EPIPE; |
| 1027 | else if (sock->state != SS_CONNECTED) |
| 1028 | return -ENOTCONN; |
| 1029 | if (!*timeo_p) |
| 1030 | return -EAGAIN; |
| 1031 | if (signal_pending(current)) |
| 1032 | return sock_intr_errno(*timeo_p); |
| 1033 | |
| 1034 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
| 1035 | done = sk_wait_event(sk, timeo_p, |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1036 | (!tsk->link_cong && |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1037 | !tsk_conn_cong(tsk)) || |
| 1038 | !tsk->connected); |
Ying Xue | 391a6dd | 2014-01-17 09:50:06 +0800 | [diff] [blame] | 1039 | finish_wait(sk_sleep(sk), &wait); |
| 1040 | } while (!done); |
| 1041 | return 0; |
| 1042 | } |
| 1043 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1044 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1045 | * tipc_send_stream - send stream-oriented data |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1046 | * @iocb: (unused) |
| 1047 | * @sock: socket structure |
| 1048 | * @m: data to send |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1049 | * @dsz: total length of data to be transmitted |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1050 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1051 | * Used for SOCK_STREAM data. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1052 | * |
| 1053 | * Returns the number of bytes sent on success (or partial success), |
Allan Stephens | 1303e8f | 2006-06-25 23:46:50 -0700 | [diff] [blame] | 1054 | * or errno if no data sent |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1055 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1056 | static int tipc_send_stream(struct kiocb *iocb, struct socket *sock, |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1057 | struct msghdr *m, size_t dsz) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1058 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1059 | struct sock *sk = sock->sk; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1060 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1061 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1062 | struct tipc_msg *mhdr = &tsk->phdr; |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 1063 | struct sk_buff_head *pktchain = &sk->sk_write_queue; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1064 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 1065 | u32 portid = tsk->portid; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1066 | int rc = -EINVAL; |
| 1067 | long timeo; |
| 1068 | u32 dnode; |
| 1069 | uint mtu, send, sent = 0; |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 1070 | struct iov_iter save; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1071 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1072 | /* Handle implied connection establishment */ |
| 1073 | if (unlikely(dest)) { |
| 1074 | rc = tipc_sendmsg(iocb, sock, m, dsz); |
| 1075 | if (dsz && (dsz == rc)) |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1076 | tsk->sent_unacked = 1; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1077 | return rc; |
| 1078 | } |
| 1079 | if (dsz > (uint)INT_MAX) |
| 1080 | return -EMSGSIZE; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1081 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1082 | if (iocb) |
| 1083 | lock_sock(sk); |
| 1084 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1085 | if (unlikely(sock->state != SS_CONNECTED)) { |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1086 | if (sock->state == SS_DISCONNECTING) |
| 1087 | rc = -EPIPE; |
wangweidong | b055597 | 2013-12-27 10:09:39 +0800 | [diff] [blame] | 1088 | else |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1089 | rc = -ENOTCONN; |
wangweidong | 3b8401f | 2013-12-12 09:36:40 +0800 | [diff] [blame] | 1090 | goto exit; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1091 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1092 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1093 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1094 | dnode = tsk_peer_node(tsk); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1095 | |
| 1096 | next: |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 1097 | save = m->msg_iter; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1098 | mtu = tsk->max_pkt; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1099 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 1100 | rc = tipc_msg_build(mhdr, m, sent, send, mtu, pktchain); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1101 | if (unlikely(rc < 0)) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1102 | goto exit; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1103 | do { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1104 | if (likely(!tsk_conn_cong(tsk))) { |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 1105 | rc = tipc_link_xmit(net, pktchain, dnode, portid); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1106 | if (likely(!rc)) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1107 | tsk->sent_unacked++; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1108 | sent += send; |
| 1109 | if (sent == dsz) |
| 1110 | break; |
| 1111 | goto next; |
Allan Stephens | 1303e8f | 2006-06-25 23:46:50 -0700 | [diff] [blame] | 1112 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1113 | if (rc == -EMSGSIZE) { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1114 | tsk->max_pkt = tipc_node_get_mtu(net, dnode, |
| 1115 | portid); |
Al Viro | f25dcc7 | 2014-11-28 15:52:29 -0500 | [diff] [blame] | 1116 | m->msg_iter = save; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1117 | goto next; |
| 1118 | } |
| 1119 | if (rc != -ELINKCONG) |
| 1120 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1121 | tsk->link_cong = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1122 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1123 | rc = tipc_wait_for_sndpkt(sock, &timeo); |
Erik Hugne | 70452dc | 2014-07-06 20:38:50 -0400 | [diff] [blame] | 1124 | if (rc) |
Jon Paul Maloy | 94153e3 | 2015-02-05 08:36:40 -0500 | [diff] [blame] | 1125 | __skb_queue_purge(pktchain); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1126 | } while (!rc); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1127 | exit: |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1128 | if (iocb) |
| 1129 | release_sock(sk); |
| 1130 | return sent ? sent : rc; |
| 1131 | } |
| 1132 | |
| 1133 | /** |
| 1134 | * tipc_send_packet - send a connection-oriented message |
| 1135 | * @iocb: if NULL, indicates that socket lock is already held |
| 1136 | * @sock: socket structure |
| 1137 | * @m: message to send |
| 1138 | * @dsz: length of data to be transmitted |
| 1139 | * |
| 1140 | * Used for SOCK_SEQPACKET messages. |
| 1141 | * |
| 1142 | * Returns the number of bytes sent on success, or errno otherwise |
| 1143 | */ |
| 1144 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
| 1145 | struct msghdr *m, size_t dsz) |
| 1146 | { |
| 1147 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
| 1148 | return -EMSGSIZE; |
| 1149 | |
| 1150 | return tipc_send_stream(iocb, sock, m, dsz); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1151 | } |
| 1152 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1153 | /* tipc_sk_finish_conn - complete the setup of a connection |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1154 | */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1155 | 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] | 1156 | u32 peer_node) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1157 | { |
Ying Xue | 3721e9c | 2015-01-13 17:07:48 +0800 | [diff] [blame] | 1158 | struct sock *sk = &tsk->sk; |
| 1159 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1160 | struct tipc_msg *msg = &tsk->phdr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1161 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1162 | msg_set_destnode(msg, peer_node); |
| 1163 | msg_set_destport(msg, peer_port); |
| 1164 | msg_set_type(msg, TIPC_CONN_MSG); |
| 1165 | msg_set_lookup_scope(msg, 0); |
| 1166 | msg_set_hdr_sz(msg, SHORT_H_SIZE); |
Jon Paul Maloy | f9fef18 | 2014-03-12 11:31:08 -0400 | [diff] [blame] | 1167 | |
Ying Xue | 2f55c43 | 2015-01-09 15:27:00 +0800 | [diff] [blame] | 1168 | tsk->probing_intv = CONN_PROBING_INTERVAL; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1169 | tsk->probing_state = TIPC_CONN_OK; |
| 1170 | tsk->connected = 1; |
Ying Xue | 3721e9c | 2015-01-13 17:07:48 +0800 | [diff] [blame] | 1171 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1172 | tipc_node_add_conn(net, peer_node, tsk->portid, peer_port); |
| 1173 | tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1174 | } |
| 1175 | |
| 1176 | /** |
| 1177 | * set_orig_addr - capture sender's address for received message |
| 1178 | * @m: descriptor for message info |
| 1179 | * @msg: received message header |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1180 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1181 | * Note: Address is not captured if not requested by receiver. |
| 1182 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 1183 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1184 | { |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 1185 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1186 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1187 | if (addr) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1188 | addr->family = AF_TIPC; |
| 1189 | addr->addrtype = TIPC_ADDR_ID; |
Mathias Krause | 60085c3 | 2013-04-07 01:52:00 +0000 | [diff] [blame] | 1190 | memset(&addr->addr, 0, sizeof(addr->addr)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1191 | addr->addr.id.ref = msg_origport(msg); |
| 1192 | addr->addr.id.node = msg_orignode(msg); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1193 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
| 1194 | addr->scope = 0; /* could leave uninitialized */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1195 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
| 1196 | } |
| 1197 | } |
| 1198 | |
| 1199 | /** |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1200 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1201 | * @m: descriptor for message info |
| 1202 | * @msg: received message header |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1203 | * @tsk: TIPC port associated with message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1204 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1205 | * Note: Ancillary data is not captured if not requested by receiver. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1206 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1207 | * Returns 0 if successful, otherwise errno |
| 1208 | */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1209 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
| 1210 | struct tipc_sock *tsk) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1211 | { |
| 1212 | u32 anc_data[3]; |
| 1213 | u32 err; |
| 1214 | u32 dest_type; |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1215 | int has_name; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1216 | int res; |
| 1217 | |
| 1218 | if (likely(m->msg_controllen == 0)) |
| 1219 | return 0; |
| 1220 | |
| 1221 | /* Optionally capture errored message object(s) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1222 | err = msg ? msg_errcode(msg) : 0; |
| 1223 | if (unlikely(err)) { |
| 1224 | anc_data[0] = err; |
| 1225 | anc_data[1] = msg_data_sz(msg); |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1226 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
| 1227 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1228 | return res; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1229 | if (anc_data[1]) { |
| 1230 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], |
| 1231 | msg_data(msg)); |
| 1232 | if (res) |
| 1233 | return res; |
| 1234 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1235 | } |
| 1236 | |
| 1237 | /* Optionally capture message destination object */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1238 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
| 1239 | switch (dest_type) { |
| 1240 | case TIPC_NAMED_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1241 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1242 | anc_data[0] = msg_nametype(msg); |
| 1243 | anc_data[1] = msg_namelower(msg); |
| 1244 | anc_data[2] = msg_namelower(msg); |
| 1245 | break; |
| 1246 | case TIPC_MCAST_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1247 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1248 | anc_data[0] = msg_nametype(msg); |
| 1249 | anc_data[1] = msg_namelower(msg); |
| 1250 | anc_data[2] = msg_nameupper(msg); |
| 1251 | break; |
| 1252 | case TIPC_CONN_MSG: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1253 | has_name = (tsk->conn_type != 0); |
| 1254 | anc_data[0] = tsk->conn_type; |
| 1255 | anc_data[1] = tsk->conn_instance; |
| 1256 | anc_data[2] = tsk->conn_instance; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1257 | break; |
| 1258 | default: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1259 | has_name = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1260 | } |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1261 | if (has_name) { |
| 1262 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); |
| 1263 | if (res) |
| 1264 | return res; |
| 1265 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1266 | |
| 1267 | return 0; |
| 1268 | } |
| 1269 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1270 | 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] | 1271 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1272 | struct net *net = sock_net(&tsk->sk); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1273 | struct sk_buff *skb = NULL; |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1274 | struct tipc_msg *msg; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1275 | u32 peer_port = tsk_peer_port(tsk); |
| 1276 | u32 dnode = tsk_peer_node(tsk); |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1277 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1278 | if (!tsk->connected) |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1279 | return; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1280 | skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, |
| 1281 | dnode, tsk_own_node(tsk), peer_port, |
| 1282 | tsk->portid, TIPC_OK); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1283 | if (!skb) |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1284 | return; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1285 | msg = buf_msg(skb); |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1286 | msg_set_msgcnt(msg, ack); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1287 | tipc_link_xmit_skb(net, skb, dnode, msg_link_selector(msg)); |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1288 | } |
| 1289 | |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1290 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1291 | { |
| 1292 | struct sock *sk = sock->sk; |
| 1293 | DEFINE_WAIT(wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1294 | long timeo = *timeop; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1295 | int err; |
| 1296 | |
| 1297 | for (;;) { |
| 1298 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 1299 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1300 | if (sock->state == SS_DISCONNECTING) { |
| 1301 | err = -ENOTCONN; |
| 1302 | break; |
| 1303 | } |
| 1304 | release_sock(sk); |
| 1305 | timeo = schedule_timeout(timeo); |
| 1306 | lock_sock(sk); |
| 1307 | } |
| 1308 | err = 0; |
| 1309 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 1310 | break; |
| 1311 | err = sock_intr_errno(timeo); |
| 1312 | if (signal_pending(current)) |
| 1313 | break; |
| 1314 | err = -EAGAIN; |
| 1315 | if (!timeo) |
| 1316 | break; |
| 1317 | } |
| 1318 | finish_wait(sk_sleep(sk), &wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1319 | *timeop = timeo; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1320 | return err; |
| 1321 | } |
| 1322 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1323 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1324 | * tipc_recvmsg - receive packet-oriented message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1325 | * @iocb: (unused) |
| 1326 | * @m: descriptor for message info |
| 1327 | * @buf_len: total size of user buffer area |
| 1328 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1329 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1330 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
| 1331 | * If the complete message doesn't fit in user area, truncate it. |
| 1332 | * |
| 1333 | * Returns size of returned message data, errno otherwise |
| 1334 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1335 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 1336 | struct msghdr *m, size_t buf_len, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1337 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1338 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1339 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1340 | struct sk_buff *buf; |
| 1341 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1342 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1343 | unsigned int sz; |
| 1344 | u32 err; |
| 1345 | int res; |
| 1346 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1347 | /* Catch invalid receive requests */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1348 | if (unlikely(!buf_len)) |
| 1349 | return -EINVAL; |
| 1350 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1351 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1352 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1353 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1354 | res = -ENOTCONN; |
| 1355 | goto exit; |
| 1356 | } |
| 1357 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1358 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1359 | restart: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1360 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1361 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1362 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1363 | if (res) |
| 1364 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1365 | |
| 1366 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1367 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1368 | msg = buf_msg(buf); |
| 1369 | sz = msg_data_sz(msg); |
| 1370 | err = msg_errcode(msg); |
| 1371 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1372 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1373 | if ((!sz) && (!err)) { |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1374 | tsk_advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1375 | goto restart; |
| 1376 | } |
| 1377 | |
| 1378 | /* Capture sender's address (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1379 | set_orig_addr(m, msg); |
| 1380 | |
| 1381 | /* Capture ancillary data (optional) */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1382 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1383 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1384 | goto exit; |
| 1385 | |
| 1386 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1387 | if (!err) { |
| 1388 | if (unlikely(buf_len < sz)) { |
| 1389 | sz = buf_len; |
| 1390 | m->msg_flags |= MSG_TRUNC; |
| 1391 | } |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 1392 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1393 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1394 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1395 | res = sz; |
| 1396 | } else { |
| 1397 | if ((sock->state == SS_READY) || |
| 1398 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) |
| 1399 | res = 0; |
| 1400 | else |
| 1401 | res = -ECONNRESET; |
| 1402 | } |
| 1403 | |
| 1404 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1405 | if (likely(!(flags & MSG_PEEK))) { |
Allan Stephens | 9900980 | 2008-04-15 00:06:12 -0700 | [diff] [blame] | 1406 | if ((sock->state != SS_READY) && |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1407 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1408 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1409 | tsk->rcv_unacked = 0; |
| 1410 | } |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1411 | tsk_advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1412 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1413 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1414 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1415 | return res; |
| 1416 | } |
| 1417 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1418 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1419 | * tipc_recv_stream - receive stream-oriented data |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1420 | * @iocb: (unused) |
| 1421 | * @m: descriptor for message info |
| 1422 | * @buf_len: total size of user buffer area |
| 1423 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1424 | * |
| 1425 | * Used for SOCK_STREAM messages only. If not enough data is available |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1426 | * will optionally wait for more; never truncates data. |
| 1427 | * |
| 1428 | * Returns size of returned message data, errno otherwise |
| 1429 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1430 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
| 1431 | struct msghdr *m, size_t buf_len, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1432 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1433 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1434 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1435 | struct sk_buff *buf; |
| 1436 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1437 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1438 | unsigned int sz; |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1439 | int sz_to_copy, target, needed; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1440 | int sz_copied = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1441 | u32 err; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1442 | int res = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1443 | |
| 1444 | /* Catch invalid receive attempts */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1445 | if (unlikely(!buf_len)) |
| 1446 | return -EINVAL; |
| 1447 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1448 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1449 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1450 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1451 | res = -ENOTCONN; |
| 1452 | goto exit; |
| 1453 | } |
| 1454 | |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1455 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1456 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 1457 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1458 | restart: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1459 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1460 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1461 | if (res) |
| 1462 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1463 | |
| 1464 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1465 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1466 | msg = buf_msg(buf); |
| 1467 | sz = msg_data_sz(msg); |
| 1468 | err = msg_errcode(msg); |
| 1469 | |
| 1470 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1471 | if ((!sz) && (!err)) { |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1472 | tsk_advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1473 | goto restart; |
| 1474 | } |
| 1475 | |
| 1476 | /* Optionally capture sender's address & ancillary data of first msg */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1477 | if (sz_copied == 0) { |
| 1478 | set_orig_addr(m, msg); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1479 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1480 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1481 | goto exit; |
| 1482 | } |
| 1483 | |
| 1484 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1485 | if (!err) { |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1486 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1487 | |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1488 | sz -= offset; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1489 | needed = (buf_len - sz_copied); |
| 1490 | sz_to_copy = (sz <= needed) ? sz : needed; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1491 | |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 1492 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
| 1493 | m, sz_to_copy); |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1494 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1495 | goto exit; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1496 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1497 | sz_copied += sz_to_copy; |
| 1498 | |
| 1499 | if (sz_to_copy < sz) { |
| 1500 | if (!(flags & MSG_PEEK)) |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1501 | TIPC_SKB_CB(buf)->handle = |
| 1502 | (void *)(unsigned long)(offset + sz_to_copy); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1503 | goto exit; |
| 1504 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1505 | } else { |
| 1506 | if (sz_copied != 0) |
| 1507 | goto exit; /* can't add error msg to valid data */ |
| 1508 | |
| 1509 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) |
| 1510 | res = 0; |
| 1511 | else |
| 1512 | res = -ECONNRESET; |
| 1513 | } |
| 1514 | |
| 1515 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1516 | if (likely(!(flags & MSG_PEEK))) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1517 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1518 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1519 | tsk->rcv_unacked = 0; |
| 1520 | } |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1521 | tsk_advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1522 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1523 | |
| 1524 | /* Loop around if more data is required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1525 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
| 1526 | (!skb_queue_empty(&sk->sk_receive_queue) || |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1527 | (sz_copied < target)) && /* and more is ready or required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1528 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
| 1529 | (!err)) /* and haven't reached a FIN */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1530 | goto restart; |
| 1531 | |
| 1532 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1533 | release_sock(sk); |
Allan Stephens | a3b0a5a | 2006-06-25 23:48:22 -0700 | [diff] [blame] | 1534 | return sz_copied ? sz_copied : res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1535 | } |
| 1536 | |
| 1537 | /** |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1538 | * tipc_write_space - wake up thread if port congestion is released |
| 1539 | * @sk: socket |
| 1540 | */ |
| 1541 | static void tipc_write_space(struct sock *sk) |
| 1542 | { |
| 1543 | struct socket_wq *wq; |
| 1544 | |
| 1545 | rcu_read_lock(); |
| 1546 | wq = rcu_dereference(sk->sk_wq); |
| 1547 | if (wq_has_sleeper(wq)) |
| 1548 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
| 1549 | POLLWRNORM | POLLWRBAND); |
| 1550 | rcu_read_unlock(); |
| 1551 | } |
| 1552 | |
| 1553 | /** |
| 1554 | * tipc_data_ready - wake up threads to indicate messages have been received |
| 1555 | * @sk: socket |
| 1556 | * @len: the length of messages |
| 1557 | */ |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1558 | static void tipc_data_ready(struct sock *sk) |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1559 | { |
| 1560 | struct socket_wq *wq; |
| 1561 | |
| 1562 | rcu_read_lock(); |
| 1563 | wq = rcu_dereference(sk->sk_wq); |
| 1564 | if (wq_has_sleeper(wq)) |
| 1565 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
| 1566 | POLLRDNORM | POLLRDBAND); |
| 1567 | rcu_read_unlock(); |
| 1568 | } |
| 1569 | |
| 1570 | /** |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1571 | * filter_connect - Handle all incoming messages for a connection-based socket |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1572 | * @tsk: TIPC socket |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1573 | * @skb: pointer to message buffer. Set to NULL if buffer is consumed |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1574 | * |
stephen hemminger | b2ad5e5 | 2014-10-29 22:58:51 -0700 | [diff] [blame] | 1575 | * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1576 | */ |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1577 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **skb) |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1578 | { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1579 | struct sock *sk = &tsk->sk; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1580 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1581 | struct socket *sock = sk->sk_socket; |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1582 | struct tipc_msg *msg = buf_msg(*skb); |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1583 | int retval = -TIPC_ERR_NO_PORT; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1584 | |
| 1585 | if (msg_mcast(msg)) |
| 1586 | return retval; |
| 1587 | |
| 1588 | switch ((int)sock->state) { |
| 1589 | case SS_CONNECTED: |
| 1590 | /* Accept only connection-based messages sent by peer */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1591 | if (tsk_peer_msg(tsk, msg)) { |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1592 | if (unlikely(msg_errcode(msg))) { |
| 1593 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1594 | tsk->connected = 0; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1595 | /* let timer expire on it's own */ |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 1596 | tipc_node_remove_conn(net, tsk_peer_node(tsk), |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 1597 | tsk->portid); |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1598 | } |
| 1599 | retval = TIPC_OK; |
| 1600 | } |
| 1601 | break; |
| 1602 | case SS_CONNECTING: |
| 1603 | /* Accept only ACK or NACK message */ |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1604 | |
| 1605 | if (unlikely(!msg_connected(msg))) |
| 1606 | break; |
| 1607 | |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1608 | if (unlikely(msg_errcode(msg))) { |
| 1609 | sock->state = SS_DISCONNECTING; |
Erik Hugne | 2c8d851 | 2013-08-28 09:29:58 +0200 | [diff] [blame] | 1610 | sk->sk_err = ECONNREFUSED; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1611 | retval = TIPC_OK; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1612 | break; |
| 1613 | } |
| 1614 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1615 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1616 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1617 | sk->sk_err = EINVAL; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1618 | retval = TIPC_OK; |
| 1619 | break; |
| 1620 | } |
| 1621 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1622 | tipc_sk_finish_conn(tsk, msg_origport(msg), msg_orignode(msg)); |
| 1623 | msg_set_importance(&tsk->phdr, msg_importance(msg)); |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1624 | sock->state = SS_CONNECTED; |
| 1625 | |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1626 | /* If an incoming message is an 'ACK-', it should be |
| 1627 | * discarded here because it doesn't contain useful |
| 1628 | * data. In addition, we should try to wake up |
| 1629 | * connect() routine if sleeping. |
| 1630 | */ |
| 1631 | if (msg_data_sz(msg) == 0) { |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1632 | kfree_skb(*skb); |
| 1633 | *skb = NULL; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1634 | if (waitqueue_active(sk_sleep(sk))) |
| 1635 | wake_up_interruptible(sk_sleep(sk)); |
| 1636 | } |
| 1637 | retval = TIPC_OK; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1638 | break; |
| 1639 | case SS_LISTENING: |
| 1640 | case SS_UNCONNECTED: |
| 1641 | /* Accept only SYN message */ |
| 1642 | if (!msg_connected(msg) && !(msg_errcode(msg))) |
| 1643 | retval = TIPC_OK; |
| 1644 | break; |
| 1645 | case SS_DISCONNECTING: |
| 1646 | break; |
| 1647 | default: |
| 1648 | pr_err("Unknown socket state %u\n", sock->state); |
| 1649 | } |
| 1650 | return retval; |
| 1651 | } |
| 1652 | |
| 1653 | /** |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1654 | * rcvbuf_limit - get proper overload limit of socket receive queue |
| 1655 | * @sk: socket |
| 1656 | * @buf: message |
| 1657 | * |
| 1658 | * For all connection oriented messages, irrespective of importance, |
| 1659 | * the default overload value (i.e. 67MB) is set as limit. |
| 1660 | * |
| 1661 | * For all connectionless messages, by default new queue limits are |
| 1662 | * as belows: |
| 1663 | * |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 1664 | * TIPC_LOW_IMPORTANCE (4 MB) |
| 1665 | * TIPC_MEDIUM_IMPORTANCE (8 MB) |
| 1666 | * TIPC_HIGH_IMPORTANCE (16 MB) |
| 1667 | * TIPC_CRITICAL_IMPORTANCE (32 MB) |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1668 | * |
| 1669 | * Returns overload limit according to corresponding message importance |
| 1670 | */ |
| 1671 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) |
| 1672 | { |
| 1673 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1674 | |
| 1675 | if (msg_connected(msg)) |
wangweidong | 0cee6bb | 2013-12-12 09:36:39 +0800 | [diff] [blame] | 1676 | return sysctl_tipc_rmem[2]; |
| 1677 | |
| 1678 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << |
| 1679 | msg_importance(msg); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1680 | } |
| 1681 | |
| 1682 | /** |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1683 | * filter_rcv - validate incoming message |
| 1684 | * @sk: socket |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1685 | * @skb: pointer to message. Set to NULL if buffer is consumed. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1686 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1687 | * Enqueues message on receive queue if acceptable; optionally handles |
| 1688 | * disconnect indication for a connected socket. |
| 1689 | * |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1690 | * Called with socket lock already taken |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1691 | * |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1692 | * Returns 0 (TIPC_OK) if message was ok, -TIPC error code if rejected |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1693 | */ |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1694 | static int filter_rcv(struct sock *sk, struct sk_buff **skb) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1695 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1696 | struct socket *sock = sk->sk_socket; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1697 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1698 | struct tipc_msg *msg = buf_msg(*skb); |
| 1699 | unsigned int limit = rcvbuf_limit(sk, *skb); |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1700 | int rc = TIPC_OK; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1701 | |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1702 | if (unlikely(msg_user(msg) == CONN_MANAGER)) { |
| 1703 | tipc_sk_proto_rcv(tsk, skb); |
| 1704 | return TIPC_OK; |
| 1705 | } |
Jon Paul Maloy | ec8a2e5 | 2014-06-25 20:41:40 -0500 | [diff] [blame] | 1706 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1707 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1708 | kfree_skb(*skb); |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1709 | tsk->link_cong = 0; |
| 1710 | sk->sk_write_space(sk); |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1711 | *skb = NULL; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1712 | return TIPC_OK; |
| 1713 | } |
| 1714 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1715 | /* Reject message if it is wrong sort of message for socket */ |
Allan Stephens | aad5854 | 2012-04-26 18:13:08 -0400 | [diff] [blame] | 1716 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1717 | return -TIPC_ERR_NO_PORT; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1718 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1719 | if (sock->state == SS_READY) { |
Allan Stephens | b29f142 | 2010-12-31 18:59:25 +0000 | [diff] [blame] | 1720 | if (msg_connected(msg)) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1721 | return -TIPC_ERR_NO_PORT; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1722 | } else { |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1723 | rc = filter_connect(tsk, skb); |
| 1724 | if (rc != TIPC_OK || !*skb) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1725 | return rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1726 | } |
| 1727 | |
| 1728 | /* Reject message if there isn't room to queue it */ |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1729 | if (sk_rmem_alloc_get(sk) + (*skb)->truesize >= limit) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1730 | return -TIPC_ERR_OVERLOAD; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1731 | |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1732 | /* Enqueue message */ |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1733 | TIPC_SKB_CB(*skb)->handle = NULL; |
| 1734 | __skb_queue_tail(&sk->sk_receive_queue, *skb); |
| 1735 | skb_set_owner_r(*skb, sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1736 | |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1737 | sk->sk_data_ready(sk); |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1738 | *skb = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1739 | return TIPC_OK; |
| 1740 | } |
| 1741 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1742 | /** |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1743 | * tipc_backlog_rcv - handle incoming message from backlog queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1744 | * @sk: socket |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1745 | * @skb: message |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1746 | * |
Jon Paul Maloy | e3a7756 | 2015-02-05 08:36:39 -0500 | [diff] [blame] | 1747 | * Caller must hold socket lock |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1748 | * |
| 1749 | * Returns 0 |
| 1750 | */ |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1751 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1752 | { |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1753 | int err; |
| 1754 | atomic_t *dcnt; |
| 1755 | u32 dnode; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1756 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 1757 | struct net *net = sock_net(sk); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 1758 | uint truesize = skb->truesize; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1759 | |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1760 | err = filter_rcv(sk, &skb); |
| 1761 | if (likely(!skb)) { |
| 1762 | dcnt = &tsk->dupl_rcvcnt; |
| 1763 | if (atomic_read(dcnt) < TIPC_CONN_OVERLOAD_LIMIT) |
| 1764 | atomic_add(truesize, dcnt); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1765 | return 0; |
| 1766 | } |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1767 | if (!err || tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, -err)) |
| 1768 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1769 | return 0; |
| 1770 | } |
| 1771 | |
| 1772 | /** |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1773 | * tipc_sk_enqueue - extract all buffers with destination 'dport' from |
| 1774 | * inputq and try adding them to socket or backlog queue |
| 1775 | * @inputq: list of incoming buffers with potentially different destinations |
| 1776 | * @sk: socket where the buffers should be enqueued |
| 1777 | * @dport: port number for the socket |
| 1778 | * @_skb: returned buffer to be forwarded or rejected, if applicable |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1779 | * |
| 1780 | * Caller must hold socket lock |
| 1781 | * |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1782 | * Returns TIPC_OK if all buffers enqueued, otherwise -TIPC_ERR_OVERLOAD |
| 1783 | * or -TIPC_ERR_NO_PORT |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1784 | */ |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1785 | static int tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk, |
| 1786 | u32 dport, struct sk_buff **_skb) |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1787 | { |
| 1788 | unsigned int lim; |
| 1789 | atomic_t *dcnt; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1790 | int err; |
| 1791 | struct sk_buff *skb; |
| 1792 | unsigned long time_limit = jiffies + 2; |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1793 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1794 | while (skb_queue_len(inputq)) { |
| 1795 | skb = tipc_skb_dequeue(inputq, dport); |
| 1796 | if (unlikely(!skb)) |
| 1797 | return TIPC_OK; |
| 1798 | /* Return if softirq window exhausted */ |
| 1799 | if (unlikely(time_after_eq(jiffies, time_limit))) |
| 1800 | return TIPC_OK; |
| 1801 | if (!sock_owned_by_user(sk)) { |
| 1802 | err = filter_rcv(sk, &skb); |
| 1803 | if (likely(!skb)) |
| 1804 | continue; |
| 1805 | *_skb = skb; |
| 1806 | return err; |
| 1807 | } |
| 1808 | dcnt = &tipc_sk(sk)->dupl_rcvcnt; |
| 1809 | if (sk->sk_backlog.len) |
| 1810 | atomic_set(dcnt, 0); |
| 1811 | lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt); |
| 1812 | if (likely(!sk_add_backlog(sk, skb, lim))) |
| 1813 | continue; |
| 1814 | *_skb = skb; |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1815 | return -TIPC_ERR_OVERLOAD; |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1816 | } |
Jon Paul Maloy | d570d86 | 2015-02-05 08:36:38 -0500 | [diff] [blame] | 1817 | return TIPC_OK; |
| 1818 | } |
| 1819 | |
| 1820 | /** |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1821 | * tipc_sk_rcv - handle a chain of incoming buffers |
| 1822 | * @inputq: buffer list containing the buffers |
| 1823 | * Consumes all buffers in list until inputq is empty |
| 1824 | * Note: may be called in multiple threads referring to the same queue |
| 1825 | * Returns 0 if last buffer was accepted, otherwise -EHOSTUNREACH |
| 1826 | * Only node local calls check the return value, sending single-buffer queues |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1827 | */ |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1828 | int tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1829 | { |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1830 | u32 dnode, dport = 0; |
| 1831 | int err = -TIPC_ERR_NO_PORT; |
| 1832 | struct sk_buff *skb; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1833 | struct tipc_sock *tsk; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 1834 | struct tipc_net *tn; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1835 | struct sock *sk; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1836 | |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1837 | while (skb_queue_len(inputq)) { |
| 1838 | skb = NULL; |
| 1839 | dport = tipc_skb_peek_port(inputq, dport); |
| 1840 | tsk = tipc_sk_lookup(net, dport); |
| 1841 | if (likely(tsk)) { |
| 1842 | sk = &tsk->sk; |
| 1843 | if (likely(spin_trylock_bh(&sk->sk_lock.slock))) { |
| 1844 | err = tipc_sk_enqueue(inputq, sk, dport, &skb); |
| 1845 | spin_unlock_bh(&sk->sk_lock.slock); |
| 1846 | dport = 0; |
| 1847 | } |
| 1848 | sock_put(sk); |
| 1849 | } else { |
| 1850 | skb = tipc_skb_dequeue(inputq, dport); |
| 1851 | } |
| 1852 | if (likely(!skb)) |
| 1853 | continue; |
| 1854 | if (tipc_msg_lookup_dest(net, skb, &dnode, &err)) |
| 1855 | goto xmit; |
| 1856 | if (!err) { |
| 1857 | dnode = msg_destnode(buf_msg(skb)); |
| 1858 | goto xmit; |
| 1859 | } |
| 1860 | tn = net_generic(net, tipc_net_id); |
| 1861 | if (!tipc_msg_reverse(tn->own_addr, skb, &dnode, -err)) |
| 1862 | continue; |
Jon Paul Maloy | e3a7756 | 2015-02-05 08:36:39 -0500 | [diff] [blame] | 1863 | xmit: |
Jon Paul Maloy | c637c10 | 2015-02-05 08:36:41 -0500 | [diff] [blame] | 1864 | tipc_link_xmit_skb(net, skb, dnode, dport); |
| 1865 | } |
Jon Paul Maloy | 1186adf | 2015-02-05 08:36:37 -0500 | [diff] [blame] | 1866 | return err ? -EHOSTUNREACH : 0; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1867 | } |
| 1868 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1869 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
| 1870 | { |
| 1871 | struct sock *sk = sock->sk; |
| 1872 | DEFINE_WAIT(wait); |
| 1873 | int done; |
| 1874 | |
| 1875 | do { |
| 1876 | int err = sock_error(sk); |
| 1877 | if (err) |
| 1878 | return err; |
| 1879 | if (!*timeo_p) |
| 1880 | return -ETIMEDOUT; |
| 1881 | if (signal_pending(current)) |
| 1882 | return sock_intr_errno(*timeo_p); |
| 1883 | |
| 1884 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
| 1885 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); |
| 1886 | finish_wait(sk_sleep(sk), &wait); |
| 1887 | } while (!done); |
| 1888 | return 0; |
| 1889 | } |
| 1890 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1891 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1892 | * tipc_connect - establish a connection to another TIPC port |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1893 | * @sock: socket structure |
| 1894 | * @dest: socket address for destination port |
| 1895 | * @destlen: size of socket address data structure |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1896 | * @flags: file-related flags associated with socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1897 | * |
| 1898 | * Returns 0 on success, errno otherwise |
| 1899 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1900 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
| 1901 | int destlen, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1902 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1903 | struct sock *sk = sock->sk; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1904 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
| 1905 | struct msghdr m = {NULL,}; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1906 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
| 1907 | socket_state previous; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1908 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1909 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1910 | lock_sock(sk); |
| 1911 | |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1912 | /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1913 | if (sock->state == SS_READY) { |
| 1914 | res = -EOPNOTSUPP; |
| 1915 | goto exit; |
| 1916 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1917 | |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1918 | /* |
| 1919 | * Reject connection attempt using multicast address |
| 1920 | * |
| 1921 | * Note: send_msg() validates the rest of the address fields, |
| 1922 | * so there's no need to do it here |
| 1923 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1924 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
| 1925 | res = -EINVAL; |
| 1926 | goto exit; |
| 1927 | } |
| 1928 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1929 | previous = sock->state; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1930 | switch (sock->state) { |
| 1931 | case SS_UNCONNECTED: |
| 1932 | /* Send a 'SYN-' to destination */ |
| 1933 | m.msg_name = dest; |
| 1934 | m.msg_namelen = destlen; |
| 1935 | |
| 1936 | /* If connect is in non-blocking case, set MSG_DONTWAIT to |
| 1937 | * indicate send_msg() is never blocked. |
| 1938 | */ |
| 1939 | if (!timeout) |
| 1940 | m.msg_flags = MSG_DONTWAIT; |
| 1941 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1942 | res = tipc_sendmsg(NULL, sock, &m, 0); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1943 | if ((res < 0) && (res != -EWOULDBLOCK)) |
| 1944 | goto exit; |
| 1945 | |
| 1946 | /* Just entered SS_CONNECTING state; the only |
| 1947 | * difference is that return value in non-blocking |
| 1948 | * case is EINPROGRESS, rather than EALREADY. |
| 1949 | */ |
| 1950 | res = -EINPROGRESS; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1951 | case SS_CONNECTING: |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1952 | if (previous == SS_CONNECTING) |
| 1953 | res = -EALREADY; |
| 1954 | if (!timeout) |
| 1955 | goto exit; |
| 1956 | timeout = msecs_to_jiffies(timeout); |
| 1957 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ |
| 1958 | res = tipc_wait_for_connect(sock, &timeout); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1959 | break; |
| 1960 | case SS_CONNECTED: |
| 1961 | res = -EISCONN; |
| 1962 | break; |
| 1963 | default: |
| 1964 | res = -EINVAL; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1965 | break; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1966 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1967 | exit: |
| 1968 | release_sock(sk); |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1969 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1970 | } |
| 1971 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1972 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1973 | * tipc_listen - allow socket to listen for incoming connections |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1974 | * @sock: socket structure |
| 1975 | * @len: (unused) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1976 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1977 | * Returns 0 on success, errno otherwise |
| 1978 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1979 | static int tipc_listen(struct socket *sock, int len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1980 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1981 | struct sock *sk = sock->sk; |
| 1982 | int res; |
| 1983 | |
| 1984 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1985 | |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 1986 | if (sock->state != SS_UNCONNECTED) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1987 | res = -EINVAL; |
| 1988 | else { |
| 1989 | sock->state = SS_LISTENING; |
| 1990 | res = 0; |
| 1991 | } |
| 1992 | |
| 1993 | release_sock(sk); |
| 1994 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1995 | } |
| 1996 | |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1997 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
| 1998 | { |
| 1999 | struct sock *sk = sock->sk; |
| 2000 | DEFINE_WAIT(wait); |
| 2001 | int err; |
| 2002 | |
| 2003 | /* True wake-one mechanism for incoming connections: only |
| 2004 | * one process gets woken up, not the 'whole herd'. |
| 2005 | * Since we do not 'race & poll' for established sockets |
| 2006 | * anymore, the common case will execute the loop only once. |
| 2007 | */ |
| 2008 | for (;;) { |
| 2009 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, |
| 2010 | TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 2011 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 2012 | release_sock(sk); |
| 2013 | timeo = schedule_timeout(timeo); |
| 2014 | lock_sock(sk); |
| 2015 | } |
| 2016 | err = 0; |
| 2017 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 2018 | break; |
| 2019 | err = -EINVAL; |
| 2020 | if (sock->state != SS_LISTENING) |
| 2021 | break; |
| 2022 | err = sock_intr_errno(timeo); |
| 2023 | if (signal_pending(current)) |
| 2024 | break; |
| 2025 | err = -EAGAIN; |
| 2026 | if (!timeo) |
| 2027 | break; |
| 2028 | } |
| 2029 | finish_wait(sk_sleep(sk), &wait); |
| 2030 | return err; |
| 2031 | } |
| 2032 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2033 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2034 | * tipc_accept - wait for connection request |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2035 | * @sock: listening socket |
| 2036 | * @newsock: new socket that is to be connected |
| 2037 | * @flags: file-related flags associated with socket |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2038 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2039 | * Returns 0 on success, errno otherwise |
| 2040 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2041 | 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] | 2042 | { |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2043 | struct sock *new_sk, *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2044 | struct sk_buff *buf; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2045 | struct tipc_sock *new_tsock; |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2046 | struct tipc_msg *msg; |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 2047 | long timeo; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2048 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2049 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2050 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2051 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2052 | if (sock->state != SS_LISTENING) { |
| 2053 | res = -EINVAL; |
| 2054 | goto exit; |
| 2055 | } |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 2056 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 2057 | res = tipc_wait_for_accept(sock, timeo); |
| 2058 | if (res) |
| 2059 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2060 | |
| 2061 | buf = skb_peek(&sk->sk_receive_queue); |
| 2062 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2063 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2064 | if (res) |
| 2065 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2066 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2067 | new_sk = new_sock->sk; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2068 | new_tsock = tipc_sk(new_sk); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2069 | msg = buf_msg(buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2070 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2071 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
| 2072 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2073 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2074 | /* |
| 2075 | * Reject any stray messages received by new socket |
| 2076 | * before the socket lock was taken (very, very unlikely) |
| 2077 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 2078 | tsk_rej_rx_queue(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2079 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2080 | /* Connect new socket to it's peer */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2081 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2082 | new_sock->state = SS_CONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2083 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2084 | tsk_set_importance(new_tsock, msg_importance(msg)); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2085 | if (msg_named(msg)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2086 | new_tsock->conn_type = msg_nametype(msg); |
| 2087 | new_tsock->conn_instance = msg_nameinst(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2088 | } |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2089 | |
| 2090 | /* |
| 2091 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. |
| 2092 | * Respond to 'SYN+' by queuing it on new socket. |
| 2093 | */ |
| 2094 | if (!msg_data_sz(msg)) { |
| 2095 | struct msghdr m = {NULL,}; |
| 2096 | |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 2097 | tsk_advance_rx_queue(sk); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2098 | tipc_send_packet(NULL, new_sock, &m, 0); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2099 | } else { |
| 2100 | __skb_dequeue(&sk->sk_receive_queue); |
| 2101 | __skb_queue_head(&new_sk->sk_receive_queue, buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 2102 | skb_set_owner_r(buf, new_sk); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2103 | } |
| 2104 | release_sock(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2105 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2106 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2107 | return res; |
| 2108 | } |
| 2109 | |
| 2110 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2111 | * tipc_shutdown - shutdown socket connection |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2112 | * @sock: socket structure |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 2113 | * @how: direction to close (must be SHUT_RDWR) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2114 | * |
| 2115 | * Terminates connection (if necessary), then purges socket's receive queue. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2116 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2117 | * Returns 0 on success, errno otherwise |
| 2118 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2119 | static int tipc_shutdown(struct socket *sock, int how) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2120 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2121 | struct sock *sk = sock->sk; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2122 | struct net *net = sock_net(sk); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2123 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 2124 | struct sk_buff *skb; |
Jon Paul Maloy | 80e44c2 | 2014-08-22 18:09:10 -0400 | [diff] [blame] | 2125 | u32 dnode; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2126 | int res; |
| 2127 | |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 2128 | if (how != SHUT_RDWR) |
| 2129 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2130 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2131 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2132 | |
| 2133 | switch (sock->state) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2134 | case SS_CONNECTING: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2135 | case SS_CONNECTED: |
| 2136 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2137 | restart: |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 2138 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 2139 | skb = __skb_dequeue(&sk->sk_receive_queue); |
| 2140 | if (skb) { |
| 2141 | if (TIPC_SKB_CB(skb)->handle != NULL) { |
| 2142 | kfree_skb(skb); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2143 | goto restart; |
| 2144 | } |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2145 | if (tipc_msg_reverse(tsk_own_node(tsk), skb, &dnode, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2146 | TIPC_CONN_SHUTDOWN)) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2147 | tipc_link_xmit_skb(net, skb, dnode, |
| 2148 | tsk->portid); |
| 2149 | tipc_node_remove_conn(net, dnode, tsk->portid); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2150 | } else { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2151 | dnode = tsk_peer_node(tsk); |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2152 | |
| 2153 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
Jon Paul Maloy | 80e44c2 | 2014-08-22 18:09:10 -0400 | [diff] [blame] | 2154 | TIPC_CONN_MSG, SHORT_H_SIZE, |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2155 | 0, dnode, tsk_own_node(tsk), |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2156 | tsk_peer_port(tsk), |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2157 | tsk->portid, TIPC_CONN_SHUTDOWN); |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2158 | tipc_link_xmit_skb(net, skb, dnode, tsk->portid); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2159 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2160 | tsk->connected = 0; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2161 | sock->state = SS_DISCONNECTING; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2162 | tipc_node_remove_conn(net, dnode, tsk->portid); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2163 | /* fall through */ |
| 2164 | |
| 2165 | case SS_DISCONNECTING: |
| 2166 | |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 2167 | /* Discard any unreceived messages */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 2168 | __skb_queue_purge(&sk->sk_receive_queue); |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 2169 | |
| 2170 | /* Wake up anyone sleeping in poll */ |
| 2171 | sk->sk_state_change(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2172 | res = 0; |
| 2173 | break; |
| 2174 | |
| 2175 | default: |
| 2176 | res = -ENOTCONN; |
| 2177 | } |
| 2178 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2179 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2180 | return res; |
| 2181 | } |
| 2182 | |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 2183 | static void tipc_sk_timeout(unsigned long data) |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2184 | { |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 2185 | struct tipc_sock *tsk = (struct tipc_sock *)data; |
| 2186 | struct sock *sk = &tsk->sk; |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 2187 | struct sk_buff *skb = NULL; |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2188 | u32 peer_port, peer_node; |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2189 | u32 own_node = tsk_own_node(tsk); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2190 | |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2191 | bh_lock_sock(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2192 | if (!tsk->connected) { |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2193 | bh_unlock_sock(sk); |
| 2194 | goto exit; |
| 2195 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2196 | peer_port = tsk_peer_port(tsk); |
| 2197 | peer_node = tsk_peer_node(tsk); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2198 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2199 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2200 | /* Previous probe not answered -> self abort */ |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2201 | skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2202 | TIPC_CONN_MSG, SHORT_H_SIZE, 0, |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2203 | own_node, peer_node, tsk->portid, |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2204 | peer_port, TIPC_ERR_NO_PORT); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2205 | } else { |
Jon Paul Maloy | c589863 | 2015-02-05 08:36:36 -0500 | [diff] [blame] | 2206 | skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, |
| 2207 | INT_H_SIZE, 0, peer_node, own_node, |
Ying Xue | f2f2a96 | 2015-01-09 15:27:02 +0800 | [diff] [blame] | 2208 | peer_port, tsk->portid, TIPC_OK); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2209 | tsk->probing_state = TIPC_CONN_PROBING; |
Ying Xue | 3721e9c | 2015-01-13 17:07:48 +0800 | [diff] [blame] | 2210 | sk_reset_timer(sk, &sk->sk_timer, jiffies + tsk->probing_intv); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2211 | } |
| 2212 | bh_unlock_sock(sk); |
Ying Xue | a6ca109 | 2014-11-26 11:41:55 +0800 | [diff] [blame] | 2213 | if (skb) |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2214 | tipc_link_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid); |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2215 | exit: |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2216 | sock_put(sk); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2217 | } |
| 2218 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2219 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2220 | struct tipc_name_seq const *seq) |
| 2221 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2222 | struct net *net = sock_net(&tsk->sk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2223 | struct publication *publ; |
| 2224 | u32 key; |
| 2225 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2226 | if (tsk->connected) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2227 | return -EINVAL; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2228 | key = tsk->portid + tsk->pub_count + 1; |
| 2229 | if (key == tsk->portid) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2230 | return -EADDRINUSE; |
| 2231 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2232 | publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper, |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2233 | scope, tsk->portid, key); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2234 | if (unlikely(!publ)) |
| 2235 | return -EINVAL; |
| 2236 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2237 | list_add(&publ->pport_list, &tsk->publications); |
| 2238 | tsk->pub_count++; |
| 2239 | tsk->published = 1; |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2240 | return 0; |
| 2241 | } |
| 2242 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2243 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2244 | struct tipc_name_seq const *seq) |
| 2245 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2246 | struct net *net = sock_net(&tsk->sk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2247 | struct publication *publ; |
| 2248 | struct publication *safe; |
| 2249 | int rc = -EINVAL; |
| 2250 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2251 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2252 | if (seq) { |
| 2253 | if (publ->scope != scope) |
| 2254 | continue; |
| 2255 | if (publ->type != seq->type) |
| 2256 | continue; |
| 2257 | if (publ->lower != seq->lower) |
| 2258 | continue; |
| 2259 | if (publ->upper != seq->upper) |
| 2260 | break; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2261 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2262 | publ->ref, publ->key); |
| 2263 | rc = 0; |
| 2264 | break; |
| 2265 | } |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2266 | tipc_nametbl_withdraw(net, publ->type, publ->lower, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2267 | publ->ref, publ->key); |
| 2268 | rc = 0; |
| 2269 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2270 | if (list_empty(&tsk->publications)) |
| 2271 | tsk->published = 0; |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2272 | return rc; |
| 2273 | } |
| 2274 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2275 | static int tipc_sk_show(struct tipc_sock *tsk, char *buf, |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2276 | int len, int full_id) |
| 2277 | { |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2278 | struct net *net = sock_net(&tsk->sk); |
| 2279 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2280 | struct publication *publ; |
| 2281 | int ret; |
| 2282 | |
| 2283 | if (full_id) |
| 2284 | ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:", |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2285 | tipc_zone(tn->own_addr), |
| 2286 | tipc_cluster(tn->own_addr), |
| 2287 | tipc_node(tn->own_addr), tsk->portid); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2288 | else |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2289 | ret = tipc_snprintf(buf, len, "%-10u:", tsk->portid); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2290 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2291 | if (tsk->connected) { |
| 2292 | u32 dport = tsk_peer_port(tsk); |
| 2293 | u32 destnode = tsk_peer_node(tsk); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2294 | |
| 2295 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2296 | " connected to <%u.%u.%u:%u>", |
| 2297 | tipc_zone(destnode), |
| 2298 | tipc_cluster(destnode), |
| 2299 | tipc_node(destnode), dport); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2300 | if (tsk->conn_type != 0) |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2301 | ret += tipc_snprintf(buf + ret, len - ret, |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2302 | " via {%u,%u}", tsk->conn_type, |
| 2303 | tsk->conn_instance); |
| 2304 | } else if (tsk->published) { |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2305 | ret += tipc_snprintf(buf + ret, len - ret, " bound to"); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2306 | list_for_each_entry(publ, &tsk->publications, pport_list) { |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2307 | if (publ->lower == publ->upper) |
| 2308 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2309 | " {%u,%u}", publ->type, |
| 2310 | publ->lower); |
| 2311 | else |
| 2312 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2313 | " {%u,%u,%u}", publ->type, |
| 2314 | publ->lower, publ->upper); |
| 2315 | } |
| 2316 | } |
| 2317 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); |
| 2318 | return ret; |
| 2319 | } |
| 2320 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2321 | struct sk_buff *tipc_sk_socks_show(struct net *net) |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2322 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2323 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2324 | const struct bucket_table *tbl; |
| 2325 | struct rhash_head *pos; |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2326 | struct sk_buff *buf; |
| 2327 | struct tlv_desc *rep_tlv; |
| 2328 | char *pb; |
| 2329 | int pb_len; |
| 2330 | struct tipc_sock *tsk; |
| 2331 | int str_len = 0; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2332 | int i; |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2333 | |
| 2334 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); |
| 2335 | if (!buf) |
| 2336 | return NULL; |
| 2337 | rep_tlv = (struct tlv_desc *)buf->data; |
| 2338 | pb = TLV_DATA(rep_tlv); |
| 2339 | pb_len = ULTRA_STRING_MAX_LEN; |
| 2340 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2341 | rcu_read_lock(); |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2342 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2343 | for (i = 0; i < tbl->size; i++) { |
| 2344 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { |
| 2345 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
| 2346 | str_len += tipc_sk_show(tsk, pb + str_len, |
| 2347 | pb_len - str_len, 0); |
| 2348 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
| 2349 | } |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2350 | } |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2351 | rcu_read_unlock(); |
| 2352 | |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2353 | str_len += 1; /* for "\0" */ |
| 2354 | skb_put(buf, TLV_SPACE(str_len)); |
| 2355 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); |
| 2356 | |
| 2357 | return buf; |
| 2358 | } |
| 2359 | |
| 2360 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
| 2361 | * when we go from standalone to network mode. |
| 2362 | */ |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2363 | void tipc_sk_reinit(struct net *net) |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2364 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2365 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2366 | const struct bucket_table *tbl; |
| 2367 | struct rhash_head *pos; |
| 2368 | struct tipc_sock *tsk; |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2369 | struct tipc_msg *msg; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2370 | int i; |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2371 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2372 | rcu_read_lock(); |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2373 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2374 | for (i = 0; i < tbl->size; i++) { |
| 2375 | rht_for_each_entry_rcu(tsk, pos, tbl, i, node) { |
| 2376 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
| 2377 | msg = &tsk->phdr; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2378 | msg_set_prevnode(msg, tn->own_addr); |
| 2379 | msg_set_orignode(msg, tn->own_addr); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2380 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
| 2381 | } |
| 2382 | } |
| 2383 | rcu_read_unlock(); |
| 2384 | } |
| 2385 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2386 | static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid) |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2387 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2388 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2389 | struct tipc_sock *tsk; |
| 2390 | |
| 2391 | rcu_read_lock(); |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2392 | tsk = rhashtable_lookup(&tn->sk_rht, &portid); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2393 | if (tsk) |
| 2394 | sock_hold(&tsk->sk); |
| 2395 | rcu_read_unlock(); |
| 2396 | |
| 2397 | return tsk; |
| 2398 | } |
| 2399 | |
| 2400 | static int tipc_sk_insert(struct tipc_sock *tsk) |
| 2401 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2402 | struct sock *sk = &tsk->sk; |
| 2403 | struct net *net = sock_net(sk); |
| 2404 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2405 | u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1; |
| 2406 | u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT; |
| 2407 | |
| 2408 | while (remaining--) { |
| 2409 | portid++; |
| 2410 | if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT)) |
| 2411 | portid = TIPC_MIN_PORT; |
| 2412 | tsk->portid = portid; |
| 2413 | sock_hold(&tsk->sk); |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2414 | if (rhashtable_lookup_insert(&tn->sk_rht, &tsk->node)) |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2415 | return 0; |
| 2416 | sock_put(&tsk->sk); |
| 2417 | } |
| 2418 | |
| 2419 | return -1; |
| 2420 | } |
| 2421 | |
| 2422 | static void tipc_sk_remove(struct tipc_sock *tsk) |
| 2423 | { |
| 2424 | struct sock *sk = &tsk->sk; |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2425 | struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2426 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2427 | if (rhashtable_remove(&tn->sk_rht, &tsk->node)) { |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2428 | WARN_ON(atomic_read(&sk->sk_refcnt) == 1); |
| 2429 | __sock_put(sk); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2430 | } |
| 2431 | } |
| 2432 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2433 | int tipc_sk_rht_init(struct net *net) |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2434 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2435 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2436 | struct rhashtable_params rht_params = { |
| 2437 | .nelem_hint = 192, |
| 2438 | .head_offset = offsetof(struct tipc_sock, node), |
| 2439 | .key_offset = offsetof(struct tipc_sock, portid), |
| 2440 | .key_len = sizeof(u32), /* portid */ |
| 2441 | .hashfn = jhash, |
| 2442 | .max_shift = 20, /* 1M */ |
| 2443 | .min_shift = 8, /* 256 */ |
| 2444 | .grow_decision = rht_grow_above_75, |
| 2445 | .shrink_decision = rht_shrink_below_30, |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2446 | }; |
| 2447 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2448 | return rhashtable_init(&tn->sk_rht, &rht_params); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2449 | } |
| 2450 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2451 | void tipc_sk_rht_destroy(struct net *net) |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2452 | { |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2453 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
| 2454 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2455 | /* Wait for socket readers to complete */ |
| 2456 | synchronize_net(); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2457 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2458 | rhashtable_destroy(&tn->sk_rht); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2459 | } |
| 2460 | |
| 2461 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2462 | * tipc_setsockopt - set socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2463 | * @sock: socket structure |
| 2464 | * @lvl: option level |
| 2465 | * @opt: option identifier |
| 2466 | * @ov: pointer to new option value |
| 2467 | * @ol: length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2468 | * |
| 2469 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2470 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2471 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2472 | * Returns 0 on success, errno otherwise |
| 2473 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2474 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
| 2475 | char __user *ov, unsigned int ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2476 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2477 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2478 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2479 | u32 value; |
| 2480 | int res; |
| 2481 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2482 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 2483 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2484 | if (lvl != SOL_TIPC) |
| 2485 | return -ENOPROTOOPT; |
| 2486 | if (ol < sizeof(value)) |
| 2487 | return -EINVAL; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 2488 | res = get_user(value, (u32 __user *)ov); |
| 2489 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2490 | return res; |
| 2491 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2492 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2493 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2494 | switch (opt) { |
| 2495 | case TIPC_IMPORTANCE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2496 | res = tsk_set_importance(tsk, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2497 | break; |
| 2498 | case TIPC_SRC_DROPPABLE: |
| 2499 | if (sock->type != SOCK_STREAM) |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2500 | tsk_set_unreliable(tsk, value); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2501 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2502 | res = -ENOPROTOOPT; |
| 2503 | break; |
| 2504 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2505 | tsk_set_unreturnable(tsk, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2506 | break; |
| 2507 | case TIPC_CONN_TIMEOUT: |
Allan Stephens | a0f40f0 | 2011-05-26 13:44:34 -0400 | [diff] [blame] | 2508 | tipc_sk(sk)->conn_timeout = value; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2509 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2510 | break; |
| 2511 | default: |
| 2512 | res = -EINVAL; |
| 2513 | } |
| 2514 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2515 | release_sock(sk); |
| 2516 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2517 | return res; |
| 2518 | } |
| 2519 | |
| 2520 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2521 | * tipc_getsockopt - get socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2522 | * @sock: socket structure |
| 2523 | * @lvl: option level |
| 2524 | * @opt: option identifier |
| 2525 | * @ov: receptacle for option value |
| 2526 | * @ol: receptacle for length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2527 | * |
| 2528 | * 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] | 2529 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2530 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2531 | * Returns 0 on success, errno otherwise |
| 2532 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2533 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
| 2534 | char __user *ov, int __user *ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2535 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2536 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2537 | struct tipc_sock *tsk = tipc_sk(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2538 | int len; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2539 | u32 value; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2540 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2541 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2542 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 2543 | return put_user(0, ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2544 | if (lvl != SOL_TIPC) |
| 2545 | return -ENOPROTOOPT; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 2546 | res = get_user(len, ol); |
| 2547 | if (res) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2548 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2549 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2550 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2551 | |
| 2552 | switch (opt) { |
| 2553 | case TIPC_IMPORTANCE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2554 | value = tsk_importance(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2555 | break; |
| 2556 | case TIPC_SRC_DROPPABLE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2557 | value = tsk_unreliable(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2558 | break; |
| 2559 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2560 | value = tsk_unreturnable(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2561 | break; |
| 2562 | case TIPC_CONN_TIMEOUT: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2563 | value = tsk->conn_timeout; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2564 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2565 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2566 | case TIPC_NODE_RECVQ_DEPTH: |
Ying Xue | 9da3d47 | 2012-11-27 06:15:27 -0500 | [diff] [blame] | 2567 | value = 0; /* was tipc_queue_size, now obsolete */ |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2568 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2569 | case TIPC_SOCK_RECVQ_DEPTH: |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2570 | value = skb_queue_len(&sk->sk_receive_queue); |
| 2571 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2572 | default: |
| 2573 | res = -EINVAL; |
| 2574 | } |
| 2575 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2576 | release_sock(sk); |
| 2577 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2578 | if (res) |
| 2579 | return res; /* "get" failed */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2580 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2581 | if (len < sizeof(value)) |
| 2582 | return -EINVAL; |
| 2583 | |
| 2584 | if (copy_to_user(ov, &value, sizeof(value))) |
| 2585 | return -EFAULT; |
| 2586 | |
| 2587 | return put_user(sizeof(value), ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2588 | } |
| 2589 | |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2590 | 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] | 2591 | { |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2592 | struct sock *sk = sock->sk; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2593 | struct tipc_sioc_ln_req lnr; |
| 2594 | void __user *argp = (void __user *)arg; |
| 2595 | |
| 2596 | switch (cmd) { |
| 2597 | case SIOCGETLINKNAME: |
| 2598 | if (copy_from_user(&lnr, argp, sizeof(lnr))) |
| 2599 | return -EFAULT; |
Ying Xue | f2f9800 | 2015-01-09 15:27:05 +0800 | [diff] [blame] | 2600 | if (!tipc_node_get_linkname(sock_net(sk), |
| 2601 | lnr.bearer_id & 0xffff, lnr.peer, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2602 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
| 2603 | if (copy_to_user(argp, &lnr, sizeof(lnr))) |
| 2604 | return -EFAULT; |
| 2605 | return 0; |
| 2606 | } |
| 2607 | return -EADDRNOTAVAIL; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2608 | default: |
| 2609 | return -ENOIOCTLCMD; |
| 2610 | } |
| 2611 | } |
| 2612 | |
Ben Hutchings | ae86b9e | 2012-07-10 10:55:35 +0000 | [diff] [blame] | 2613 | /* Protocol switches for the various types of TIPC sockets */ |
| 2614 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2615 | static const struct proto_ops msg_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2616 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2617 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2618 | .release = tipc_release, |
| 2619 | .bind = tipc_bind, |
| 2620 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2621 | .socketpair = sock_no_socketpair, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2622 | .accept = sock_no_accept, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2623 | .getname = tipc_getname, |
| 2624 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2625 | .ioctl = tipc_ioctl, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2626 | .listen = sock_no_listen, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2627 | .shutdown = tipc_shutdown, |
| 2628 | .setsockopt = tipc_setsockopt, |
| 2629 | .getsockopt = tipc_getsockopt, |
| 2630 | .sendmsg = tipc_sendmsg, |
| 2631 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2632 | .mmap = sock_no_mmap, |
| 2633 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2634 | }; |
| 2635 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2636 | static const struct proto_ops packet_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2637 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2638 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2639 | .release = tipc_release, |
| 2640 | .bind = tipc_bind, |
| 2641 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2642 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2643 | .accept = tipc_accept, |
| 2644 | .getname = tipc_getname, |
| 2645 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2646 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2647 | .listen = tipc_listen, |
| 2648 | .shutdown = tipc_shutdown, |
| 2649 | .setsockopt = tipc_setsockopt, |
| 2650 | .getsockopt = tipc_getsockopt, |
| 2651 | .sendmsg = tipc_send_packet, |
| 2652 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2653 | .mmap = sock_no_mmap, |
| 2654 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2655 | }; |
| 2656 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2657 | static const struct proto_ops stream_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2658 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2659 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2660 | .release = tipc_release, |
| 2661 | .bind = tipc_bind, |
| 2662 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2663 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2664 | .accept = tipc_accept, |
| 2665 | .getname = tipc_getname, |
| 2666 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2667 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2668 | .listen = tipc_listen, |
| 2669 | .shutdown = tipc_shutdown, |
| 2670 | .setsockopt = tipc_setsockopt, |
| 2671 | .getsockopt = tipc_getsockopt, |
| 2672 | .sendmsg = tipc_send_stream, |
| 2673 | .recvmsg = tipc_recv_stream, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2674 | .mmap = sock_no_mmap, |
| 2675 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2676 | }; |
| 2677 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2678 | static const struct net_proto_family tipc_family_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2679 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2680 | .family = AF_TIPC, |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2681 | .create = tipc_sk_create |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2682 | }; |
| 2683 | |
| 2684 | static struct proto tipc_proto = { |
| 2685 | .name = "TIPC", |
| 2686 | .owner = THIS_MODULE, |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 2687 | .obj_size = sizeof(struct tipc_sock), |
| 2688 | .sysctl_rmem = sysctl_tipc_rmem |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2689 | }; |
| 2690 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2691 | static struct proto tipc_proto_kern = { |
| 2692 | .name = "TIPC", |
| 2693 | .obj_size = sizeof(struct tipc_sock), |
| 2694 | .sysctl_rmem = sysctl_tipc_rmem |
| 2695 | }; |
| 2696 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2697 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2698 | * tipc_socket_init - initialize TIPC socket interface |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2699 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2700 | * Returns 0 on success, errno otherwise |
| 2701 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2702 | int tipc_socket_init(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2703 | { |
| 2704 | int res; |
| 2705 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2706 | res = proto_register(&tipc_proto, 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2707 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2708 | pr_err("Failed to register TIPC protocol type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2709 | goto out; |
| 2710 | } |
| 2711 | |
| 2712 | res = sock_register(&tipc_family_ops); |
| 2713 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2714 | pr_err("Failed to register TIPC socket type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2715 | proto_unregister(&tipc_proto); |
| 2716 | goto out; |
| 2717 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2718 | out: |
| 2719 | return res; |
| 2720 | } |
| 2721 | |
| 2722 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2723 | * tipc_socket_stop - stop TIPC socket interface |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2724 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2725 | void tipc_socket_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2726 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2727 | sock_unregister(tipc_family_ops.family); |
| 2728 | proto_unregister(&tipc_proto); |
| 2729 | } |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2730 | |
| 2731 | /* Caller should hold socket lock for the passed tipc socket. */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 2732 | 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] | 2733 | { |
| 2734 | u32 peer_node; |
| 2735 | u32 peer_port; |
| 2736 | struct nlattr *nest; |
| 2737 | |
| 2738 | peer_node = tsk_peer_node(tsk); |
| 2739 | peer_port = tsk_peer_port(tsk); |
| 2740 | |
| 2741 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); |
| 2742 | |
| 2743 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) |
| 2744 | goto msg_full; |
| 2745 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) |
| 2746 | goto msg_full; |
| 2747 | |
| 2748 | if (tsk->conn_type != 0) { |
| 2749 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) |
| 2750 | goto msg_full; |
| 2751 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) |
| 2752 | goto msg_full; |
| 2753 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) |
| 2754 | goto msg_full; |
| 2755 | } |
| 2756 | nla_nest_end(skb, nest); |
| 2757 | |
| 2758 | return 0; |
| 2759 | |
| 2760 | msg_full: |
| 2761 | nla_nest_cancel(skb, nest); |
| 2762 | |
| 2763 | return -EMSGSIZE; |
| 2764 | } |
| 2765 | |
| 2766 | /* Caller should hold socket lock for the passed tipc socket. */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 2767 | static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
| 2768 | struct tipc_sock *tsk) |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2769 | { |
| 2770 | int err; |
| 2771 | void *hdr; |
| 2772 | struct nlattr *attrs; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2773 | struct net *net = sock_net(skb->sk); |
| 2774 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2775 | |
| 2776 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
| 2777 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
| 2778 | if (!hdr) |
| 2779 | goto msg_cancel; |
| 2780 | |
| 2781 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); |
| 2782 | if (!attrs) |
| 2783 | goto genlmsg_cancel; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2784 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid)) |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2785 | goto attr_msg_cancel; |
Ying Xue | 3474753 | 2015-01-09 15:27:10 +0800 | [diff] [blame] | 2786 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr)) |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2787 | goto attr_msg_cancel; |
| 2788 | |
| 2789 | if (tsk->connected) { |
| 2790 | err = __tipc_nl_add_sk_con(skb, tsk); |
| 2791 | if (err) |
| 2792 | goto attr_msg_cancel; |
| 2793 | } else if (!list_empty(&tsk->publications)) { |
| 2794 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) |
| 2795 | goto attr_msg_cancel; |
| 2796 | } |
| 2797 | nla_nest_end(skb, attrs); |
| 2798 | genlmsg_end(skb, hdr); |
| 2799 | |
| 2800 | return 0; |
| 2801 | |
| 2802 | attr_msg_cancel: |
| 2803 | nla_nest_cancel(skb, attrs); |
| 2804 | genlmsg_cancel: |
| 2805 | genlmsg_cancel(skb, hdr); |
| 2806 | msg_cancel: |
| 2807 | return -EMSGSIZE; |
| 2808 | } |
| 2809 | |
| 2810 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 2811 | { |
| 2812 | int err; |
| 2813 | struct tipc_sock *tsk; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2814 | const struct bucket_table *tbl; |
| 2815 | struct rhash_head *pos; |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2816 | struct net *net = sock_net(skb->sk); |
| 2817 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2818 | u32 tbl_id = cb->args[0]; |
| 2819 | u32 prev_portid = cb->args[1]; |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2820 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2821 | rcu_read_lock(); |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2822 | tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht); |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2823 | for (; tbl_id < tbl->size; tbl_id++) { |
| 2824 | rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) { |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2825 | spin_lock_bh(&tsk->sk.sk_lock.slock); |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2826 | if (prev_portid && prev_portid != tsk->portid) { |
| 2827 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
| 2828 | continue; |
| 2829 | } |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2830 | |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2831 | err = __tipc_nl_add_sk(skb, cb, tsk); |
| 2832 | if (err) { |
| 2833 | prev_portid = tsk->portid; |
| 2834 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
| 2835 | goto out; |
| 2836 | } |
| 2837 | prev_portid = 0; |
| 2838 | spin_unlock_bh(&tsk->sk.sk_lock.slock); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2839 | } |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2840 | } |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2841 | out: |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2842 | rcu_read_unlock(); |
Richard Alpe | d6e164e | 2015-01-16 12:30:40 +0100 | [diff] [blame] | 2843 | cb->args[0] = tbl_id; |
| 2844 | cb->args[1] = prev_portid; |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2845 | |
| 2846 | return skb->len; |
| 2847 | } |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2848 | |
| 2849 | /* Caller should hold socket lock for the passed tipc socket. */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 2850 | static int __tipc_nl_add_sk_publ(struct sk_buff *skb, |
| 2851 | struct netlink_callback *cb, |
| 2852 | struct publication *publ) |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2853 | { |
| 2854 | void *hdr; |
| 2855 | struct nlattr *attrs; |
| 2856 | |
| 2857 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
| 2858 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
| 2859 | if (!hdr) |
| 2860 | goto msg_cancel; |
| 2861 | |
| 2862 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); |
| 2863 | if (!attrs) |
| 2864 | goto genlmsg_cancel; |
| 2865 | |
| 2866 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) |
| 2867 | goto attr_msg_cancel; |
| 2868 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) |
| 2869 | goto attr_msg_cancel; |
| 2870 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) |
| 2871 | goto attr_msg_cancel; |
| 2872 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) |
| 2873 | goto attr_msg_cancel; |
| 2874 | |
| 2875 | nla_nest_end(skb, attrs); |
| 2876 | genlmsg_end(skb, hdr); |
| 2877 | |
| 2878 | return 0; |
| 2879 | |
| 2880 | attr_msg_cancel: |
| 2881 | nla_nest_cancel(skb, attrs); |
| 2882 | genlmsg_cancel: |
| 2883 | genlmsg_cancel(skb, hdr); |
| 2884 | msg_cancel: |
| 2885 | return -EMSGSIZE; |
| 2886 | } |
| 2887 | |
| 2888 | /* Caller should hold socket lock for the passed tipc socket. */ |
Richard Alpe | d818280 | 2014-11-24 11:10:29 +0100 | [diff] [blame] | 2889 | static int __tipc_nl_list_sk_publ(struct sk_buff *skb, |
| 2890 | struct netlink_callback *cb, |
| 2891 | struct tipc_sock *tsk, u32 *last_publ) |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2892 | { |
| 2893 | int err; |
| 2894 | struct publication *p; |
| 2895 | |
| 2896 | if (*last_publ) { |
| 2897 | list_for_each_entry(p, &tsk->publications, pport_list) { |
| 2898 | if (p->key == *last_publ) |
| 2899 | break; |
| 2900 | } |
| 2901 | if (p->key != *last_publ) { |
| 2902 | /* We never set seq or call nl_dump_check_consistent() |
| 2903 | * this means that setting prev_seq here will cause the |
| 2904 | * consistence check to fail in the netlink callback |
| 2905 | * handler. Resulting in the last NLMSG_DONE message |
| 2906 | * having the NLM_F_DUMP_INTR flag set. |
| 2907 | */ |
| 2908 | cb->prev_seq = 1; |
| 2909 | *last_publ = 0; |
| 2910 | return -EPIPE; |
| 2911 | } |
| 2912 | } else { |
| 2913 | p = list_first_entry(&tsk->publications, struct publication, |
| 2914 | pport_list); |
| 2915 | } |
| 2916 | |
| 2917 | list_for_each_entry_from(p, &tsk->publications, pport_list) { |
| 2918 | err = __tipc_nl_add_sk_publ(skb, cb, p); |
| 2919 | if (err) { |
| 2920 | *last_publ = p->key; |
| 2921 | return err; |
| 2922 | } |
| 2923 | } |
| 2924 | *last_publ = 0; |
| 2925 | |
| 2926 | return 0; |
| 2927 | } |
| 2928 | |
| 2929 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 2930 | { |
| 2931 | int err; |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2932 | u32 tsk_portid = cb->args[0]; |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2933 | u32 last_publ = cb->args[1]; |
| 2934 | u32 done = cb->args[2]; |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2935 | struct net *net = sock_net(skb->sk); |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2936 | struct tipc_sock *tsk; |
| 2937 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2938 | if (!tsk_portid) { |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2939 | struct nlattr **attrs; |
| 2940 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; |
| 2941 | |
| 2942 | err = tipc_nlmsg_parse(cb->nlh, &attrs); |
| 2943 | if (err) |
| 2944 | return err; |
| 2945 | |
| 2946 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
| 2947 | attrs[TIPC_NLA_SOCK], |
| 2948 | tipc_nl_sock_policy); |
| 2949 | if (err) |
| 2950 | return err; |
| 2951 | |
| 2952 | if (!sock[TIPC_NLA_SOCK_REF]) |
| 2953 | return -EINVAL; |
| 2954 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2955 | tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2956 | } |
| 2957 | |
| 2958 | if (done) |
| 2959 | return 0; |
| 2960 | |
Ying Xue | e05b31f | 2015-01-09 15:27:08 +0800 | [diff] [blame] | 2961 | tsk = tipc_sk_lookup(net, tsk_portid); |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2962 | if (!tsk) |
| 2963 | return -EINVAL; |
| 2964 | |
| 2965 | lock_sock(&tsk->sk); |
| 2966 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); |
| 2967 | if (!err) |
| 2968 | done = 1; |
| 2969 | release_sock(&tsk->sk); |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2970 | sock_put(&tsk->sk); |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2971 | |
Ying Xue | 07f6c4b | 2015-01-07 13:41:58 +0800 | [diff] [blame] | 2972 | cb->args[0] = tsk_portid; |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 2973 | cb->args[1] = last_publ; |
| 2974 | cb->args[2] = done; |
| 2975 | |
| 2976 | return skb->len; |
| 2977 | } |