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 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 37 | #include "core.h" |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 38 | #include "name_table.h" |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 39 | #include "node.h" |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 40 | #include "link.h" |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 41 | #include <linux/export.h> |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 42 | #include "config.h" |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 43 | #include "socket.h" |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 44 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 45 | #define SS_LISTENING -1 /* socket is listening */ |
| 46 | #define SS_READY -2 /* socket is connectionless */ |
| 47 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 48 | #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */ |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 49 | #define CONN_PROBING_INTERVAL 3600000 /* [ms] => 1 h */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 50 | #define TIPC_FWD_MSG 1 |
| 51 | #define TIPC_CONN_OK 0 |
| 52 | #define TIPC_CONN_PROBING 1 |
| 53 | |
| 54 | /** |
| 55 | * struct tipc_sock - TIPC socket structure |
| 56 | * @sk: socket - interacts with 'port' and with user via the socket API |
| 57 | * @connected: non-zero if port is currently connected to a peer port |
| 58 | * @conn_type: TIPC type used when connection was established |
| 59 | * @conn_instance: TIPC instance used when connection was established |
| 60 | * @published: non-zero if port has one or more associated names |
| 61 | * @max_pkt: maximum packet size "hint" used when building messages sent by port |
| 62 | * @ref: unique reference to port in TIPC object registry |
| 63 | * @phdr: preformatted message header used when sending messages |
| 64 | * @port_list: adjacent ports in TIPC's global list of ports |
| 65 | * @publications: list of publications for port |
| 66 | * @pub_count: total # of publications port has made during its lifetime |
| 67 | * @probing_state: |
| 68 | * @probing_interval: |
| 69 | * @timer: |
| 70 | * @port: port - interacts with 'sk' and with the rest of the TIPC stack |
| 71 | * @peer_name: the peer of the connection, if any |
| 72 | * @conn_timeout: the time we can wait for an unresponded setup request |
| 73 | * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue |
| 74 | * @link_cong: non-zero if owner must sleep because of link congestion |
| 75 | * @sent_unacked: # messages sent by socket, and not yet acked by peer |
| 76 | * @rcv_unacked: # messages read by user, but not yet acked back to peer |
| 77 | */ |
| 78 | struct tipc_sock { |
| 79 | struct sock sk; |
| 80 | int connected; |
| 81 | u32 conn_type; |
| 82 | u32 conn_instance; |
| 83 | int published; |
| 84 | u32 max_pkt; |
| 85 | u32 ref; |
| 86 | struct tipc_msg phdr; |
| 87 | struct list_head sock_list; |
| 88 | struct list_head publications; |
| 89 | u32 pub_count; |
| 90 | u32 probing_state; |
| 91 | u32 probing_interval; |
| 92 | struct timer_list timer; |
| 93 | uint conn_timeout; |
| 94 | atomic_t dupl_rcvcnt; |
| 95 | bool link_cong; |
| 96 | uint sent_unacked; |
| 97 | uint rcv_unacked; |
| 98 | }; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 99 | |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 100 | 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] | 101 | static void tipc_data_ready(struct sock *sk); |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 102 | static void tipc_write_space(struct sock *sk); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 103 | static int tipc_release(struct socket *sock); |
| 104 | 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] | 105 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 106 | static void tipc_sk_timeout(unsigned long ref); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 107 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 108 | struct tipc_name_seq const *seq); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 109 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 110 | struct tipc_name_seq const *seq); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 111 | static u32 tipc_sk_ref_acquire(struct tipc_sock *tsk); |
| 112 | static void tipc_sk_ref_discard(u32 ref); |
| 113 | static struct tipc_sock *tipc_sk_get(u32 ref); |
| 114 | static struct tipc_sock *tipc_sk_get_next(u32 *ref); |
| 115 | static void tipc_sk_put(struct tipc_sock *tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 116 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 117 | static const struct proto_ops packet_ops; |
| 118 | static const struct proto_ops stream_ops; |
| 119 | static const struct proto_ops msg_ops; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 120 | |
| 121 | static struct proto tipc_proto; |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 122 | static struct proto tipc_proto_kern; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 123 | |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame^] | 124 | static const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { |
| 125 | [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, |
| 126 | [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, |
| 127 | [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, |
| 128 | [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, |
| 129 | [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } |
| 130 | }; |
| 131 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 132 | /* |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 133 | * Revised TIPC socket locking policy: |
| 134 | * |
| 135 | * Most socket operations take the standard socket lock when they start |
| 136 | * and hold it until they finish (or until they need to sleep). Acquiring |
| 137 | * this lock grants the owner exclusive access to the fields of the socket |
| 138 | * data structures, with the exception of the backlog queue. A few socket |
| 139 | * operations can be done without taking the socket lock because they only |
| 140 | * read socket information that never changes during the life of the socket. |
| 141 | * |
| 142 | * Socket operations may acquire the lock for the associated TIPC port if they |
| 143 | * need to perform an operation on the port. If any routine needs to acquire |
| 144 | * both the socket lock and the port lock it must take the socket lock first |
| 145 | * to avoid the risk of deadlock. |
| 146 | * |
| 147 | * The dispatcher handling incoming messages cannot grab the socket lock in |
| 148 | * the standard fashion, since invoked it runs at the BH level and cannot block. |
| 149 | * Instead, it checks to see if the socket lock is currently owned by someone, |
| 150 | * and either handles the message itself or adds it to the socket's backlog |
| 151 | * queue; in the latter case the queued message is processed once the process |
| 152 | * owning the socket lock releases it. |
| 153 | * |
| 154 | * NOTE: Releasing the socket lock while an operation is sleeping overcomes |
| 155 | * the problem of a blocked socket operation preventing any other operations |
| 156 | * from occurring. However, applications must be careful if they have |
| 157 | * multiple threads trying to send (or receive) on the same socket, as these |
| 158 | * operations might interfere with each other. For example, doing a connect |
| 159 | * and a receive at the same time might allow the receive to consume the |
| 160 | * ACK message meant for the connect. While additional work could be done |
| 161 | * to try and overcome this, it doesn't seem to be worthwhile at the present. |
| 162 | * |
| 163 | * NOTE: Releasing the socket lock while an operation is sleeping also ensures |
| 164 | * that another operation that must be performed in a non-blocking manner is |
| 165 | * not delayed for very long because the lock has already been taken. |
| 166 | * |
| 167 | * NOTE: This code assumes that certain fields of a port/socket pair are |
| 168 | * constant over its lifetime; such fields can be examined without taking |
| 169 | * the socket lock and/or port lock, and do not need to be re-read even |
| 170 | * after resuming processing after waiting. These fields include: |
| 171 | * - socket type |
| 172 | * - pointer to socket sk structure (aka tipc_sock structure) |
| 173 | * - pointer to port structure |
| 174 | * - port reference |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 175 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 176 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 177 | static u32 tsk_peer_node(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 178 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 179 | return msg_destnode(&tsk->phdr); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 180 | } |
| 181 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 182 | static u32 tsk_peer_port(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 183 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 184 | return msg_destport(&tsk->phdr); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 185 | } |
| 186 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 187 | static bool tsk_unreliable(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 188 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 189 | return msg_src_droppable(&tsk->phdr) != 0; |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 190 | } |
| 191 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 192 | static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 193 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 194 | msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 195 | } |
| 196 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 197 | static bool tsk_unreturnable(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 198 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 199 | return msg_dest_droppable(&tsk->phdr) != 0; |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 200 | } |
| 201 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 202 | static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 203 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 204 | msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 205 | } |
| 206 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 207 | static int tsk_importance(struct tipc_sock *tsk) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 208 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 209 | return msg_importance(&tsk->phdr); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 210 | } |
| 211 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 212 | static int tsk_set_importance(struct tipc_sock *tsk, int imp) |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 213 | { |
| 214 | if (imp > TIPC_CRITICAL_IMPORTANCE) |
| 215 | return -EINVAL; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 216 | msg_set_importance(&tsk->phdr, (u32)imp); |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 217 | return 0; |
| 218 | } |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 219 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 220 | static struct tipc_sock *tipc_sk(const struct sock *sk) |
| 221 | { |
| 222 | return container_of(sk, struct tipc_sock, sk); |
| 223 | } |
| 224 | |
| 225 | static int tsk_conn_cong(struct tipc_sock *tsk) |
| 226 | { |
| 227 | return tsk->sent_unacked >= TIPC_FLOWCTRL_WIN; |
| 228 | } |
| 229 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 230 | /** |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 231 | * tsk_advance_rx_queue - discard first buffer in socket receive queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 232 | * |
| 233 | * Caller must hold socket lock |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 234 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 235 | static void tsk_advance_rx_queue(struct sock *sk) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 236 | { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 237 | kfree_skb(__skb_dequeue(&sk->sk_receive_queue)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | /** |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 241 | * tsk_rej_rx_queue - reject all buffers in socket receive queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 242 | * |
| 243 | * Caller must hold socket lock |
| 244 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 245 | static void tsk_rej_rx_queue(struct sock *sk) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 246 | { |
| 247 | struct sk_buff *buf; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 248 | u32 dnode; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 249 | |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 250 | while ((buf = __skb_dequeue(&sk->sk_receive_queue))) { |
| 251 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 252 | tipc_link_xmit(buf, dnode, 0); |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 253 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 254 | } |
| 255 | |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 256 | /* 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] | 257 | * |
| 258 | * Handles cases where the node's network address has changed from |
| 259 | * the default of <0.0.0> to its configured setting. |
| 260 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 261 | 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] | 262 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 263 | u32 peer_port = tsk_peer_port(tsk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 264 | u32 orig_node; |
| 265 | u32 peer_node; |
| 266 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 267 | if (unlikely(!tsk->connected)) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 268 | return false; |
| 269 | |
| 270 | if (unlikely(msg_origport(msg) != peer_port)) |
| 271 | return false; |
| 272 | |
| 273 | orig_node = msg_orignode(msg); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 274 | peer_node = tsk_peer_node(tsk); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 275 | |
| 276 | if (likely(orig_node == peer_node)) |
| 277 | return true; |
| 278 | |
| 279 | if (!orig_node && (peer_node == tipc_own_addr)) |
| 280 | return true; |
| 281 | |
| 282 | if (!peer_node && (orig_node == tipc_own_addr)) |
| 283 | return true; |
| 284 | |
| 285 | return false; |
| 286 | } |
| 287 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 288 | /** |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 289 | * tipc_sk_create - create a TIPC socket |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 290 | * @net: network namespace (must be default network) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 291 | * @sock: pre-allocated socket structure |
| 292 | * @protocol: protocol indicator (must be 0) |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 293 | * @kern: caused by kernel or by userspace? |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 294 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 295 | * This routine creates additional data structures used by the TIPC socket, |
| 296 | * initializes them, and links them together. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 297 | * |
| 298 | * Returns 0 on success, errno otherwise |
| 299 | */ |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 300 | static int tipc_sk_create(struct net *net, struct socket *sock, |
| 301 | int protocol, int kern) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 302 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 303 | const struct proto_ops *ops; |
| 304 | socket_state state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 305 | struct sock *sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 306 | struct tipc_sock *tsk; |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 307 | struct tipc_msg *msg; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 308 | u32 ref; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 309 | |
| 310 | /* Validate arguments */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 311 | if (unlikely(protocol != 0)) |
| 312 | return -EPROTONOSUPPORT; |
| 313 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 314 | switch (sock->type) { |
| 315 | case SOCK_STREAM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 316 | ops = &stream_ops; |
| 317 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 318 | break; |
| 319 | case SOCK_SEQPACKET: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 320 | ops = &packet_ops; |
| 321 | state = SS_UNCONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 322 | break; |
| 323 | case SOCK_DGRAM: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 324 | case SOCK_RDM: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 325 | ops = &msg_ops; |
| 326 | state = SS_READY; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 327 | break; |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 328 | default: |
Allan Stephens | 4997865 | 2006-06-25 23:47:18 -0700 | [diff] [blame] | 329 | return -EPROTOTYPE; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 330 | } |
| 331 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 332 | /* Allocate socket's protocol area */ |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 333 | if (!kern) |
| 334 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto); |
| 335 | else |
| 336 | sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto_kern); |
| 337 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 338 | if (sk == NULL) |
| 339 | return -ENOMEM; |
| 340 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 341 | tsk = tipc_sk(sk); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 342 | ref = tipc_sk_ref_acquire(tsk); |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 343 | if (!ref) { |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 344 | pr_warn("Socket create failed; reference table exhausted\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 345 | return -ENOMEM; |
| 346 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 347 | tsk->max_pkt = MAX_PKT_DEFAULT; |
| 348 | tsk->ref = ref; |
| 349 | INIT_LIST_HEAD(&tsk->publications); |
| 350 | msg = &tsk->phdr; |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 351 | tipc_msg_init(msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, |
| 352 | NAMED_H_SIZE, 0); |
| 353 | msg_set_origport(msg, ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 354 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 355 | /* Finish initializing socket data structures */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 356 | sock->ops = ops; |
| 357 | sock->state = state; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 358 | sock_init_data(sock, sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 359 | k_init_timer(&tsk->timer, (Handler)tipc_sk_timeout, ref); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 360 | sk->sk_backlog_rcv = tipc_backlog_rcv; |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 361 | sk->sk_rcvbuf = sysctl_tipc_rmem[1]; |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 362 | sk->sk_data_ready = tipc_data_ready; |
| 363 | sk->sk_write_space = tipc_write_space; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 364 | tsk->conn_timeout = CONN_TIMEOUT_DEFAULT; |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 365 | tsk->sent_unacked = 0; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 366 | atomic_set(&tsk->dupl_rcvcnt, 0); |
Allan Stephens | 7ef43eb | 2008-05-12 15:42:28 -0700 | [diff] [blame] | 367 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 368 | if (sock->state == SS_READY) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 369 | tsk_set_unreturnable(tsk, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 370 | if (sock->type == SOCK_DGRAM) |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 371 | tsk_set_unreliable(tsk, true); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 372 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 373 | return 0; |
| 374 | } |
| 375 | |
| 376 | /** |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 377 | * tipc_sock_create_local - create TIPC socket from inside TIPC module |
| 378 | * @type: socket type - SOCK_RDM or SOCK_SEQPACKET |
| 379 | * |
| 380 | * We cannot use sock_creat_kern here because it bumps module user count. |
| 381 | * Since socket owner and creator is the same module we must make sure |
| 382 | * that module count remains zero for module local sockets, otherwise |
| 383 | * we cannot do rmmod. |
| 384 | * |
| 385 | * Returns 0 on success, errno otherwise |
| 386 | */ |
| 387 | int tipc_sock_create_local(int type, struct socket **res) |
| 388 | { |
| 389 | int rc; |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 390 | |
| 391 | rc = sock_create_lite(AF_TIPC, type, 0, res); |
| 392 | if (rc < 0) { |
| 393 | pr_err("Failed to create kernel socket\n"); |
| 394 | return rc; |
| 395 | } |
| 396 | tipc_sk_create(&init_net, *res, 0, 1); |
| 397 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 398 | return 0; |
| 399 | } |
| 400 | |
| 401 | /** |
| 402 | * tipc_sock_release_local - release socket created by tipc_sock_create_local |
| 403 | * @sock: the socket to be released. |
| 404 | * |
| 405 | * Module reference count is not incremented when such sockets are created, |
| 406 | * so we must keep it from being decremented when they are released. |
| 407 | */ |
| 408 | void tipc_sock_release_local(struct socket *sock) |
| 409 | { |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 410 | tipc_release(sock); |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 411 | sock->ops = NULL; |
| 412 | sock_release(sock); |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * tipc_sock_accept_local - accept a connection on a socket created |
| 417 | * with tipc_sock_create_local. Use this function to avoid that |
| 418 | * module reference count is inadvertently incremented. |
| 419 | * |
| 420 | * @sock: the accepting socket |
| 421 | * @newsock: reference to the new socket to be created |
| 422 | * @flags: socket flags |
| 423 | */ |
| 424 | |
| 425 | int tipc_sock_accept_local(struct socket *sock, struct socket **newsock, |
Paul Gortmaker | ae8509c | 2013-06-17 10:54:47 -0400 | [diff] [blame] | 426 | int flags) |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 427 | { |
| 428 | struct sock *sk = sock->sk; |
| 429 | int ret; |
| 430 | |
| 431 | ret = sock_create_lite(sk->sk_family, sk->sk_type, |
| 432 | sk->sk_protocol, newsock); |
| 433 | if (ret < 0) |
| 434 | return ret; |
| 435 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 436 | ret = tipc_accept(sock, *newsock, flags); |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 437 | if (ret < 0) { |
| 438 | sock_release(*newsock); |
| 439 | return ret; |
| 440 | } |
| 441 | (*newsock)->ops = sock->ops; |
| 442 | return ret; |
| 443 | } |
| 444 | |
| 445 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 446 | * tipc_release - destroy a TIPC socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 447 | * @sock: socket to destroy |
| 448 | * |
| 449 | * This routine cleans up any messages that are still queued on the socket. |
| 450 | * For DGRAM and RDM socket types, all queued messages are rejected. |
| 451 | * For SEQPACKET and STREAM socket types, the first message is rejected |
| 452 | * and any others are discarded. (If the first message on a STREAM socket |
| 453 | * 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] | 454 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 455 | * NOTE: Rejected messages are not necessarily returned to the sender! They |
| 456 | * are returned or discarded according to the "destination droppable" setting |
| 457 | * specified for the message by the sender. |
| 458 | * |
| 459 | * Returns 0 on success, errno otherwise |
| 460 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 461 | static int tipc_release(struct socket *sock) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 462 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 463 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 464 | struct tipc_sock *tsk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 465 | struct sk_buff *buf; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 466 | u32 dnode; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 467 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 468 | /* |
| 469 | * Exit if socket isn't fully initialized (occurs when a failed accept() |
| 470 | * releases a pre-allocated child socket that was never used) |
| 471 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 472 | if (sk == NULL) |
| 473 | return 0; |
| 474 | |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 475 | tsk = tipc_sk(sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 476 | lock_sock(sk); |
| 477 | |
| 478 | /* |
| 479 | * Reject all unreceived messages, except on an active connection |
| 480 | * (which disconnects locally & sends a 'FIN+' to peer) |
| 481 | */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 482 | dnode = tsk_peer_node(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 483 | while (sock->state != SS_DISCONNECTING) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 484 | buf = __skb_dequeue(&sk->sk_receive_queue); |
| 485 | if (buf == NULL) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 486 | break; |
Ying Xue | 4068243 | 2013-10-18 07:23:16 +0200 | [diff] [blame] | 487 | if (TIPC_SKB_CB(buf)->handle != NULL) |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 488 | kfree_skb(buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 489 | else { |
| 490 | if ((sock->state == SS_CONNECTING) || |
| 491 | (sock->state == SS_CONNECTED)) { |
| 492 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 493 | tsk->connected = 0; |
| 494 | tipc_node_remove_conn(dnode, tsk->ref); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 495 | } |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 496 | if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT)) |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 497 | tipc_link_xmit(buf, dnode, 0); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 498 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 499 | } |
| 500 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 501 | tipc_sk_withdraw(tsk, 0, NULL); |
| 502 | tipc_sk_ref_discard(tsk->ref); |
| 503 | k_cancel_timer(&tsk->timer); |
| 504 | if (tsk->connected) { |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 505 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, |
| 506 | SHORT_H_SIZE, 0, dnode, tipc_own_addr, |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 507 | tsk_peer_port(tsk), |
| 508 | tsk->ref, TIPC_ERR_NO_PORT); |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 509 | if (buf) |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 510 | tipc_link_xmit(buf, dnode, tsk->ref); |
| 511 | tipc_node_remove_conn(dnode, tsk->ref); |
Jon Paul Maloy | 5b8fa7c | 2014-08-22 18:09:13 -0400 | [diff] [blame] | 512 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 513 | k_term_timer(&tsk->timer); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 514 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 515 | /* Discard any remaining (connection-based) messages in receive queue */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 516 | __skb_queue_purge(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 517 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 518 | /* Reject any messages that accumulated in backlog queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 519 | sock->state = SS_DISCONNECTING; |
| 520 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 521 | sock_put(sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 522 | sock->sk = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 523 | |
Geert Uytterhoeven | 065d7e3 | 2014-04-06 15:56:14 +0200 | [diff] [blame] | 524 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 528 | * tipc_bind - associate or disassocate TIPC name(s) with a socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 529 | * @sock: socket structure |
| 530 | * @uaddr: socket address describing name(s) and desired operation |
| 531 | * @uaddr_len: size of socket address data structure |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 532 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 533 | * Name and name sequence binding is indicated using a positive scope value; |
| 534 | * a negative scope value unbinds the specified name. Specifying no name |
| 535 | * (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] | 536 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 537 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 538 | * |
| 539 | * NOTE: This routine doesn't need to take the socket lock since it doesn't |
| 540 | * access any non-constant socket information. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 541 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 542 | static int tipc_bind(struct socket *sock, struct sockaddr *uaddr, |
| 543 | int uaddr_len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 544 | { |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 545 | struct sock *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 546 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 547 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 548 | int res = -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 549 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 550 | lock_sock(sk); |
| 551 | if (unlikely(!uaddr_len)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 552 | res = tipc_sk_withdraw(tsk, 0, NULL); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 553 | goto exit; |
| 554 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 555 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 556 | if (uaddr_len < sizeof(struct sockaddr_tipc)) { |
| 557 | res = -EINVAL; |
| 558 | goto exit; |
| 559 | } |
| 560 | if (addr->family != AF_TIPC) { |
| 561 | res = -EAFNOSUPPORT; |
| 562 | goto exit; |
| 563 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 564 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 565 | if (addr->addrtype == TIPC_ADDR_NAME) |
| 566 | addr->addr.nameseq.upper = addr->addr.nameseq.lower; |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 567 | else if (addr->addrtype != TIPC_ADDR_NAMESEQ) { |
| 568 | res = -EAFNOSUPPORT; |
| 569 | goto exit; |
| 570 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 571 | |
Ying Xue | 13a2e89 | 2013-06-17 10:54:40 -0400 | [diff] [blame] | 572 | if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) && |
Ying Xue | 7d0ab17 | 2013-06-17 10:54:41 -0400 | [diff] [blame] | 573 | (addr->addr.nameseq.type != TIPC_TOP_SRV) && |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 574 | (addr->addr.nameseq.type != TIPC_CFG_SRV)) { |
| 575 | res = -EACCES; |
| 576 | goto exit; |
| 577 | } |
Allan Stephens | c422f1b | 2011-11-02 15:49:40 -0400 | [diff] [blame] | 578 | |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 579 | res = (addr->scope > 0) ? |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 580 | tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) : |
| 581 | tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq); |
Ying Xue | 8460276 | 2013-12-27 10:18:28 +0800 | [diff] [blame] | 582 | exit: |
| 583 | release_sock(sk); |
| 584 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 585 | } |
| 586 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 587 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 588 | * tipc_getname - get port ID of socket or peer socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 589 | * @sock: socket structure |
| 590 | * @uaddr: area for returned socket address |
| 591 | * @uaddr_len: area for returned length of socket address |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 592 | * @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] | 593 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 594 | * Returns 0 on success, errno otherwise |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 595 | * |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 596 | * NOTE: This routine doesn't need to take the socket lock since it only |
| 597 | * accesses socket information that is unchanging (or which changes in |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 598 | * a completely predictable manner). |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 599 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 600 | static int tipc_getname(struct socket *sock, struct sockaddr *uaddr, |
| 601 | int *uaddr_len, int peer) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 602 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 603 | struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 604 | struct tipc_sock *tsk = tipc_sk(sock->sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 605 | |
Kulikov Vasiliy | 88f8a5e | 2010-10-31 07:10:32 +0000 | [diff] [blame] | 606 | memset(addr, 0, sizeof(*addr)); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 607 | if (peer) { |
Allan Stephens | 2da5991 | 2008-07-14 22:43:32 -0700 | [diff] [blame] | 608 | if ((sock->state != SS_CONNECTED) && |
| 609 | ((peer != 2) || (sock->state != SS_DISCONNECTING))) |
| 610 | return -ENOTCONN; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 611 | addr->addr.id.ref = tsk_peer_port(tsk); |
| 612 | addr->addr.id.node = tsk_peer_node(tsk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 613 | } else { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 614 | addr->addr.id.ref = tsk->ref; |
Allan Stephens | b924dcf | 2010-11-30 12:01:03 +0000 | [diff] [blame] | 615 | addr->addr.id.node = tipc_own_addr; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 616 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 617 | |
| 618 | *uaddr_len = sizeof(*addr); |
| 619 | addr->addrtype = TIPC_ADDR_ID; |
| 620 | addr->family = AF_TIPC; |
| 621 | addr->scope = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 622 | addr->addr.name.domain = 0; |
| 623 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 624 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 625 | } |
| 626 | |
| 627 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 628 | * tipc_poll - read and possibly block on pollmask |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 629 | * @file: file structure associated with the socket |
| 630 | * @sock: socket for which to calculate the poll bits |
| 631 | * @wait: ??? |
| 632 | * |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 633 | * Returns pollmask value |
| 634 | * |
| 635 | * COMMENTARY: |
| 636 | * It appears that the usual socket locking mechanisms are not useful here |
| 637 | * since the pollmask info is potentially out-of-date the moment this routine |
| 638 | * exits. TCP and other protocols seem to rely on higher level poll routines |
| 639 | * to handle any preventable race conditions, so TIPC will do the same ... |
| 640 | * |
| 641 | * TIPC sets the returned events as follows: |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 642 | * |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 643 | * socket state flags set |
| 644 | * ------------ --------- |
| 645 | * unconnected no read flags |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 646 | * POLLOUT if port is not congested |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 647 | * |
| 648 | * connecting POLLIN/POLLRDNORM if ACK/NACK in rx queue |
| 649 | * no write flags |
| 650 | * |
| 651 | * connected POLLIN/POLLRDNORM if data in rx queue |
| 652 | * POLLOUT if port is not congested |
| 653 | * |
| 654 | * disconnecting POLLIN/POLLRDNORM/POLLHUP |
| 655 | * no write flags |
| 656 | * |
| 657 | * listening POLLIN if SYN in rx queue |
| 658 | * no write flags |
| 659 | * |
| 660 | * ready POLLIN/POLLRDNORM if data in rx queue |
| 661 | * [connectionless] POLLOUT (since port cannot be congested) |
| 662 | * |
| 663 | * IMPORTANT: The fact that a read or write operation is indicated does NOT |
| 664 | * imply that the operation will succeed, merely that it should be performed |
| 665 | * and will not block. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 666 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 667 | static unsigned int tipc_poll(struct file *file, struct socket *sock, |
| 668 | poll_table *wait) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 669 | { |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 670 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 671 | struct tipc_sock *tsk = tipc_sk(sk); |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 672 | u32 mask = 0; |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 673 | |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 674 | sock_poll_wait(file, sk_sleep(sk), wait); |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 675 | |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 676 | switch ((int)sock->state) { |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 677 | case SS_UNCONNECTED: |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 678 | if (!tsk->link_cong) |
Erik Hugne | c4fc298 | 2012-10-16 16:47:06 +0200 | [diff] [blame] | 679 | mask |= POLLOUT; |
| 680 | break; |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 681 | case SS_READY: |
| 682 | case SS_CONNECTED: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 683 | if (!tsk->link_cong && !tsk_conn_cong(tsk)) |
Allan Stephens | f662c07 | 2010-08-17 11:00:06 +0000 | [diff] [blame] | 684 | mask |= POLLOUT; |
| 685 | /* fall thru' */ |
| 686 | case SS_CONNECTING: |
| 687 | case SS_LISTENING: |
| 688 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 689 | mask |= (POLLIN | POLLRDNORM); |
| 690 | break; |
| 691 | case SS_DISCONNECTING: |
| 692 | mask = (POLLIN | POLLRDNORM | POLLHUP); |
| 693 | break; |
| 694 | } |
Allan Stephens | 9b674e8 | 2008-03-26 16:48:21 -0700 | [diff] [blame] | 695 | |
| 696 | return mask; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 697 | } |
| 698 | |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 699 | /** |
| 700 | * tipc_sendmcast - send multicast message |
| 701 | * @sock: socket structure |
| 702 | * @seq: destination address |
| 703 | * @iov: message data to send |
| 704 | * @dsz: total length of message data |
| 705 | * @timeo: timeout to wait for wakeup |
| 706 | * |
| 707 | * Called from function tipc_sendmsg(), which has done all sanity checks |
| 708 | * Returns the number of bytes sent on success, or errno |
| 709 | */ |
| 710 | static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq, |
| 711 | struct iovec *iov, size_t dsz, long timeo) |
| 712 | { |
| 713 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 714 | struct tipc_msg *mhdr = &tipc_sk(sk)->phdr; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 715 | struct sk_buff *buf; |
| 716 | uint mtu; |
| 717 | int rc; |
| 718 | |
| 719 | msg_set_type(mhdr, TIPC_MCAST_MSG); |
| 720 | msg_set_lookup_scope(mhdr, TIPC_CLUSTER_SCOPE); |
| 721 | msg_set_destport(mhdr, 0); |
| 722 | msg_set_destnode(mhdr, 0); |
| 723 | msg_set_nametype(mhdr, seq->type); |
| 724 | msg_set_namelower(mhdr, seq->lower); |
| 725 | msg_set_nameupper(mhdr, seq->upper); |
| 726 | msg_set_hdr_sz(mhdr, MCAST_H_SIZE); |
| 727 | |
| 728 | new_mtu: |
| 729 | mtu = tipc_bclink_get_mtu(); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 730 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 731 | if (unlikely(rc < 0)) |
| 732 | return rc; |
| 733 | |
| 734 | do { |
| 735 | rc = tipc_bclink_xmit(buf); |
| 736 | if (likely(rc >= 0)) { |
| 737 | rc = dsz; |
| 738 | break; |
| 739 | } |
| 740 | if (rc == -EMSGSIZE) |
| 741 | goto new_mtu; |
| 742 | if (rc != -ELINKCONG) |
| 743 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 744 | tipc_sk(sk)->link_cong = 1; |
Jon Paul Maloy | 0abd8ff | 2014-07-16 20:41:01 -0400 | [diff] [blame] | 745 | rc = tipc_wait_for_sndmsg(sock, &timeo); |
| 746 | if (rc) |
| 747 | kfree_skb_list(buf); |
| 748 | } while (!rc); |
| 749 | return rc; |
| 750 | } |
| 751 | |
Jon Paul Maloy | 078bec8 | 2014-07-16 20:41:00 -0400 | [diff] [blame] | 752 | /* tipc_sk_mcast_rcv - Deliver multicast message to all destination sockets |
| 753 | */ |
| 754 | void tipc_sk_mcast_rcv(struct sk_buff *buf) |
| 755 | { |
| 756 | struct tipc_msg *msg = buf_msg(buf); |
| 757 | struct tipc_port_list dports = {0, NULL, }; |
| 758 | struct tipc_port_list *item; |
| 759 | struct sk_buff *b; |
| 760 | uint i, last, dst = 0; |
| 761 | u32 scope = TIPC_CLUSTER_SCOPE; |
| 762 | |
| 763 | if (in_own_node(msg_orignode(msg))) |
| 764 | scope = TIPC_NODE_SCOPE; |
| 765 | |
| 766 | /* Create destination port list: */ |
| 767 | tipc_nametbl_mc_translate(msg_nametype(msg), |
| 768 | msg_namelower(msg), |
| 769 | msg_nameupper(msg), |
| 770 | scope, |
| 771 | &dports); |
| 772 | last = dports.count; |
| 773 | if (!last) { |
| 774 | kfree_skb(buf); |
| 775 | return; |
| 776 | } |
| 777 | |
| 778 | for (item = &dports; item; item = item->next) { |
| 779 | for (i = 0; i < PLSIZE && ++dst <= last; i++) { |
| 780 | b = (dst != last) ? skb_clone(buf, GFP_ATOMIC) : buf; |
| 781 | if (!b) { |
| 782 | pr_warn("Failed do clone mcast rcv buffer\n"); |
| 783 | continue; |
| 784 | } |
| 785 | msg_set_destport(msg, item->ports[i]); |
| 786 | tipc_sk_rcv(b); |
| 787 | } |
| 788 | } |
| 789 | tipc_port_list_free(&dports); |
| 790 | } |
| 791 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 792 | /** |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 793 | * tipc_sk_proto_rcv - receive a connection mng protocol message |
| 794 | * @tsk: receiving socket |
| 795 | * @dnode: node to send response message to, if any |
| 796 | * @buf: buffer containing protocol message |
| 797 | * Returns 0 (TIPC_OK) if message was consumed, 1 (TIPC_FWD_MSG) if |
| 798 | * (CONN_PROBE_REPLY) message should be forwarded. |
| 799 | */ |
Wei Yongjun | 52f50ce | 2014-07-20 13:14:28 +0800 | [diff] [blame] | 800 | static int tipc_sk_proto_rcv(struct tipc_sock *tsk, u32 *dnode, |
| 801 | struct sk_buff *buf) |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 802 | { |
| 803 | struct tipc_msg *msg = buf_msg(buf); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 804 | int conn_cong; |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 805 | |
| 806 | /* Ignore if connection cannot be validated: */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 807 | if (!tsk_peer_msg(tsk, msg)) |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 808 | goto exit; |
| 809 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 810 | tsk->probing_state = TIPC_CONN_OK; |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 811 | |
| 812 | if (msg_type(msg) == CONN_ACK) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 813 | conn_cong = tsk_conn_cong(tsk); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 814 | tsk->sent_unacked -= msg_msgcnt(msg); |
| 815 | if (conn_cong) |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 816 | tsk->sk.sk_write_space(&tsk->sk); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 817 | } else if (msg_type(msg) == CONN_PROBE) { |
| 818 | if (!tipc_msg_reverse(buf, dnode, TIPC_OK)) |
| 819 | return TIPC_OK; |
| 820 | msg_set_type(msg, CONN_PROBE_REPLY); |
| 821 | return TIPC_FWD_MSG; |
| 822 | } |
| 823 | /* Do nothing if msg_type() == CONN_PROBE_REPLY */ |
| 824 | exit: |
| 825 | kfree_skb(buf); |
| 826 | return TIPC_OK; |
| 827 | } |
| 828 | |
| 829 | /** |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 830 | * dest_name_check - verify user is permitted to send to specified port name |
| 831 | * @dest: destination address |
| 832 | * @m: descriptor for message to be sent |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 833 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 834 | * Prevents restricted configuration commands from being issued by |
| 835 | * unauthorized users. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 836 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 837 | * Returns 0 if permission is granted, otherwise errno |
| 838 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 839 | static int dest_name_check(struct sockaddr_tipc *dest, struct msghdr *m) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 840 | { |
| 841 | struct tipc_cfg_msg_hdr hdr; |
| 842 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 843 | if (unlikely(dest->addrtype == TIPC_ADDR_ID)) |
| 844 | return 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 845 | if (likely(dest->addr.name.name.type >= TIPC_RESERVED_TYPES)) |
| 846 | return 0; |
| 847 | if (likely(dest->addr.name.name.type == TIPC_TOP_SRV)) |
| 848 | return 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 849 | if (likely(dest->addr.name.name.type != TIPC_CFG_SRV)) |
| 850 | return -EACCES; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 851 | |
Allan Stephens | 3f8dd94 | 2011-01-18 13:09:29 -0500 | [diff] [blame] | 852 | if (!m->msg_iovlen || (m->msg_iov[0].iov_len < sizeof(hdr))) |
| 853 | return -EMSGSIZE; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 854 | if (copy_from_user(&hdr, m->msg_iov[0].iov_base, sizeof(hdr))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 855 | return -EFAULT; |
Allan Stephens | 70cb234 | 2006-06-25 23:41:47 -0700 | [diff] [blame] | 856 | if ((ntohs(hdr.tcm_type) & 0xC000) && (!capable(CAP_NET_ADMIN))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 857 | return -EACCES; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 858 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 859 | return 0; |
| 860 | } |
| 861 | |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 862 | static int tipc_wait_for_sndmsg(struct socket *sock, long *timeo_p) |
| 863 | { |
| 864 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 865 | struct tipc_sock *tsk = tipc_sk(sk); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 866 | DEFINE_WAIT(wait); |
| 867 | int done; |
| 868 | |
| 869 | do { |
| 870 | int err = sock_error(sk); |
| 871 | if (err) |
| 872 | return err; |
| 873 | if (sock->state == SS_DISCONNECTING) |
| 874 | return -EPIPE; |
| 875 | if (!*timeo_p) |
| 876 | return -EAGAIN; |
| 877 | if (signal_pending(current)) |
| 878 | return sock_intr_errno(*timeo_p); |
| 879 | |
| 880 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 881 | done = sk_wait_event(sk, timeo_p, !tsk->link_cong); |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 882 | finish_wait(sk_sleep(sk), &wait); |
| 883 | } while (!done); |
| 884 | return 0; |
| 885 | } |
| 886 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 887 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 888 | * tipc_sendmsg - send message in connectionless manner |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 889 | * @iocb: if NULL, indicates that socket lock is already held |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 890 | * @sock: socket structure |
| 891 | * @m: message to send |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 892 | * @dsz: amount of user data to be sent |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 893 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 894 | * Message must have an destination specified explicitly. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 895 | * Used for SOCK_RDM and SOCK_DGRAM messages, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 896 | * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections. |
| 897 | * (Note: 'SYN+' is prohibited on SOCK_STREAM.) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 898 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 899 | * Returns the number of bytes sent on success, or errno otherwise |
| 900 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 901 | static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock, |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 902 | struct msghdr *m, size_t dsz) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 903 | { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 904 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 905 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 906 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 907 | struct tipc_msg *mhdr = &tsk->phdr; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 908 | struct iovec *iov = m->msg_iov; |
| 909 | u32 dnode, dport; |
| 910 | struct sk_buff *buf; |
| 911 | struct tipc_name_seq *seq = &dest->addr.nameseq; |
| 912 | u32 mtu; |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 913 | long timeo; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 914 | int rc = -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 915 | |
| 916 | if (unlikely(!dest)) |
| 917 | return -EDESTADDRREQ; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 918 | |
Allan Stephens | 51f9cc1 | 2006-06-25 23:49:06 -0700 | [diff] [blame] | 919 | if (unlikely((m->msg_namelen < sizeof(*dest)) || |
| 920 | (dest->family != AF_TIPC))) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 921 | return -EINVAL; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 922 | |
| 923 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
Allan Stephens | c29c3f7 | 2010-04-20 17:58:24 -0400 | [diff] [blame] | 924 | return -EMSGSIZE; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 925 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 926 | if (iocb) |
| 927 | lock_sock(sk); |
| 928 | |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 929 | if (unlikely(sock->state != SS_READY)) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 930 | if (sock->state == SS_LISTENING) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 931 | rc = -EPIPE; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 932 | goto exit; |
Allan Stephens | 3388007 | 2006-06-25 23:44:57 -0700 | [diff] [blame] | 933 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 934 | if (sock->state != SS_UNCONNECTED) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 935 | rc = -EISCONN; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 936 | goto exit; |
| 937 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 938 | if (tsk->published) { |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 939 | rc = -EOPNOTSUPP; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 940 | goto exit; |
| 941 | } |
| 942 | if (dest->addrtype == TIPC_ADDR_NAME) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 943 | tsk->conn_type = dest->addr.name.name.type; |
| 944 | tsk->conn_instance = dest->addr.name.name.instance; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 945 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 946 | } |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 947 | rc = dest_name_check(dest, m); |
| 948 | if (rc) |
| 949 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 950 | |
Ying Xue | 3f40504 | 2014-01-17 09:50:05 +0800 | [diff] [blame] | 951 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 952 | |
| 953 | if (dest->addrtype == TIPC_ADDR_MCAST) { |
| 954 | rc = tipc_sendmcast(sock, seq, iov, dsz, timeo); |
| 955 | goto exit; |
| 956 | } else if (dest->addrtype == TIPC_ADDR_NAME) { |
| 957 | u32 type = dest->addr.name.name.type; |
| 958 | u32 inst = dest->addr.name.name.instance; |
| 959 | u32 domain = dest->addr.name.domain; |
| 960 | |
| 961 | dnode = domain; |
| 962 | msg_set_type(mhdr, TIPC_NAMED_MSG); |
| 963 | msg_set_hdr_sz(mhdr, NAMED_H_SIZE); |
| 964 | msg_set_nametype(mhdr, type); |
| 965 | msg_set_nameinst(mhdr, inst); |
| 966 | msg_set_lookup_scope(mhdr, tipc_addr_scope(domain)); |
| 967 | dport = tipc_nametbl_translate(type, inst, &dnode); |
| 968 | msg_set_destnode(mhdr, dnode); |
| 969 | msg_set_destport(mhdr, dport); |
| 970 | if (unlikely(!dport && !dnode)) { |
| 971 | rc = -EHOSTUNREACH; |
| 972 | goto exit; |
| 973 | } |
| 974 | } else if (dest->addrtype == TIPC_ADDR_ID) { |
| 975 | dnode = dest->addr.id.node; |
| 976 | msg_set_type(mhdr, TIPC_DIRECT_MSG); |
| 977 | msg_set_lookup_scope(mhdr, 0); |
| 978 | msg_set_destnode(mhdr, dnode); |
| 979 | msg_set_destport(mhdr, dest->addr.id.ref); |
| 980 | msg_set_hdr_sz(mhdr, BASIC_H_SIZE); |
| 981 | } |
| 982 | |
| 983 | new_mtu: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 984 | mtu = tipc_node_get_mtu(dnode, tsk->ref); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 985 | rc = tipc_msg_build(mhdr, iov, 0, dsz, mtu, &buf); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 986 | if (rc < 0) |
| 987 | goto exit; |
| 988 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 989 | do { |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 990 | TIPC_SKB_CB(buf)->wakeup_pending = tsk->link_cong; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 991 | rc = tipc_link_xmit(buf, dnode, tsk->ref); |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 992 | if (likely(rc >= 0)) { |
| 993 | if (sock->state != SS_READY) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 994 | sock->state = SS_CONNECTING; |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 995 | rc = dsz; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 996 | break; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 997 | } |
Jon Paul Maloy | e2dafe8 | 2014-06-25 20:41:37 -0500 | [diff] [blame] | 998 | if (rc == -EMSGSIZE) |
| 999 | goto new_mtu; |
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) |
| 1005 | kfree_skb_list(buf); |
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; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1060 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1061 | struct tipc_msg *mhdr = &tsk->phdr; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1062 | struct sk_buff *buf; |
| 1063 | DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1064 | u32 ref = tsk->ref; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1065 | int rc = -EINVAL; |
| 1066 | long timeo; |
| 1067 | u32 dnode; |
| 1068 | uint mtu, send, sent = 0; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1069 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1070 | /* Handle implied connection establishment */ |
| 1071 | if (unlikely(dest)) { |
| 1072 | rc = tipc_sendmsg(iocb, sock, m, dsz); |
| 1073 | if (dsz && (dsz == rc)) |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1074 | tsk->sent_unacked = 1; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1075 | return rc; |
| 1076 | } |
| 1077 | if (dsz > (uint)INT_MAX) |
| 1078 | return -EMSGSIZE; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1079 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1080 | if (iocb) |
| 1081 | lock_sock(sk); |
| 1082 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1083 | if (unlikely(sock->state != SS_CONNECTED)) { |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1084 | if (sock->state == SS_DISCONNECTING) |
| 1085 | rc = -EPIPE; |
wangweidong | b055597 | 2013-12-27 10:09:39 +0800 | [diff] [blame] | 1086 | else |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1087 | rc = -ENOTCONN; |
wangweidong | 3b8401f | 2013-12-12 09:36:40 +0800 | [diff] [blame] | 1088 | goto exit; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1089 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1090 | |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1091 | timeo = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1092 | dnode = tsk_peer_node(tsk); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1093 | |
| 1094 | next: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1095 | mtu = tsk->max_pkt; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1096 | send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE); |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1097 | rc = tipc_msg_build(mhdr, m->msg_iov, sent, send, mtu, &buf); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1098 | if (unlikely(rc < 0)) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1099 | goto exit; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1100 | do { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1101 | if (likely(!tsk_conn_cong(tsk))) { |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1102 | rc = tipc_link_xmit(buf, dnode, ref); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1103 | if (likely(!rc)) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1104 | tsk->sent_unacked++; |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1105 | sent += send; |
| 1106 | if (sent == dsz) |
| 1107 | break; |
| 1108 | goto next; |
Allan Stephens | 1303e8f | 2006-06-25 23:46:50 -0700 | [diff] [blame] | 1109 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1110 | if (rc == -EMSGSIZE) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1111 | tsk->max_pkt = tipc_node_get_mtu(dnode, ref); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1112 | goto next; |
| 1113 | } |
| 1114 | if (rc != -ELINKCONG) |
| 1115 | break; |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1116 | tsk->link_cong = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1117 | } |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1118 | rc = tipc_wait_for_sndpkt(sock, &timeo); |
Erik Hugne | 70452dc | 2014-07-06 20:38:50 -0400 | [diff] [blame] | 1119 | if (rc) |
| 1120 | kfree_skb_list(buf); |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1121 | } while (!rc); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1122 | exit: |
Jon Paul Maloy | 4ccfe5e | 2014-06-25 20:41:38 -0500 | [diff] [blame] | 1123 | if (iocb) |
| 1124 | release_sock(sk); |
| 1125 | return sent ? sent : rc; |
| 1126 | } |
| 1127 | |
| 1128 | /** |
| 1129 | * tipc_send_packet - send a connection-oriented message |
| 1130 | * @iocb: if NULL, indicates that socket lock is already held |
| 1131 | * @sock: socket structure |
| 1132 | * @m: message to send |
| 1133 | * @dsz: length of data to be transmitted |
| 1134 | * |
| 1135 | * Used for SOCK_SEQPACKET messages. |
| 1136 | * |
| 1137 | * Returns the number of bytes sent on success, or errno otherwise |
| 1138 | */ |
| 1139 | static int tipc_send_packet(struct kiocb *iocb, struct socket *sock, |
| 1140 | struct msghdr *m, size_t dsz) |
| 1141 | { |
| 1142 | if (dsz > TIPC_MAX_USER_MSG_SIZE) |
| 1143 | return -EMSGSIZE; |
| 1144 | |
| 1145 | return tipc_send_stream(iocb, sock, m, dsz); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1146 | } |
| 1147 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1148 | /* tipc_sk_finish_conn - complete the setup of a connection |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1149 | */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1150 | 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] | 1151 | u32 peer_node) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1152 | { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1153 | struct tipc_msg *msg = &tsk->phdr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1154 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1155 | msg_set_destnode(msg, peer_node); |
| 1156 | msg_set_destport(msg, peer_port); |
| 1157 | msg_set_type(msg, TIPC_CONN_MSG); |
| 1158 | msg_set_lookup_scope(msg, 0); |
| 1159 | msg_set_hdr_sz(msg, SHORT_H_SIZE); |
Jon Paul Maloy | f9fef18 | 2014-03-12 11:31:08 -0400 | [diff] [blame] | 1160 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1161 | tsk->probing_interval = CONN_PROBING_INTERVAL; |
| 1162 | tsk->probing_state = TIPC_CONN_OK; |
| 1163 | tsk->connected = 1; |
| 1164 | k_start_timer(&tsk->timer, tsk->probing_interval); |
| 1165 | tipc_node_add_conn(peer_node, tsk->ref, peer_port); |
| 1166 | tsk->max_pkt = tipc_node_get_mtu(peer_node, tsk->ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1167 | } |
| 1168 | |
| 1169 | /** |
| 1170 | * set_orig_addr - capture sender's address for received message |
| 1171 | * @m: descriptor for message info |
| 1172 | * @msg: received message header |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1173 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1174 | * Note: Address is not captured if not requested by receiver. |
| 1175 | */ |
Sam Ravnborg | 05790c6 | 2006-03-20 22:37:04 -0800 | [diff] [blame] | 1176 | static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1177 | { |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 1178 | DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1179 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1180 | if (addr) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1181 | addr->family = AF_TIPC; |
| 1182 | addr->addrtype = TIPC_ADDR_ID; |
Mathias Krause | 60085c3 | 2013-04-07 01:52:00 +0000 | [diff] [blame] | 1183 | memset(&addr->addr, 0, sizeof(addr->addr)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1184 | addr->addr.id.ref = msg_origport(msg); |
| 1185 | addr->addr.id.node = msg_orignode(msg); |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 1186 | addr->addr.name.domain = 0; /* could leave uninitialized */ |
| 1187 | addr->scope = 0; /* could leave uninitialized */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1188 | m->msg_namelen = sizeof(struct sockaddr_tipc); |
| 1189 | } |
| 1190 | } |
| 1191 | |
| 1192 | /** |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1193 | * tipc_sk_anc_data_recv - optionally capture ancillary data for received message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1194 | * @m: descriptor for message info |
| 1195 | * @msg: received message header |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1196 | * @tsk: TIPC port associated with message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1197 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1198 | * Note: Ancillary data is not captured if not requested by receiver. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1199 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1200 | * Returns 0 if successful, otherwise errno |
| 1201 | */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1202 | static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg, |
| 1203 | struct tipc_sock *tsk) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1204 | { |
| 1205 | u32 anc_data[3]; |
| 1206 | u32 err; |
| 1207 | u32 dest_type; |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1208 | int has_name; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1209 | int res; |
| 1210 | |
| 1211 | if (likely(m->msg_controllen == 0)) |
| 1212 | return 0; |
| 1213 | |
| 1214 | /* Optionally capture errored message object(s) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1215 | err = msg ? msg_errcode(msg) : 0; |
| 1216 | if (unlikely(err)) { |
| 1217 | anc_data[0] = err; |
| 1218 | anc_data[1] = msg_data_sz(msg); |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1219 | res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data); |
| 1220 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1221 | return res; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1222 | if (anc_data[1]) { |
| 1223 | res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1], |
| 1224 | msg_data(msg)); |
| 1225 | if (res) |
| 1226 | return res; |
| 1227 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1228 | } |
| 1229 | |
| 1230 | /* Optionally capture message destination object */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1231 | dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG; |
| 1232 | switch (dest_type) { |
| 1233 | case TIPC_NAMED_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1234 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1235 | anc_data[0] = msg_nametype(msg); |
| 1236 | anc_data[1] = msg_namelower(msg); |
| 1237 | anc_data[2] = msg_namelower(msg); |
| 1238 | break; |
| 1239 | case TIPC_MCAST_MSG: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1240 | has_name = 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1241 | anc_data[0] = msg_nametype(msg); |
| 1242 | anc_data[1] = msg_namelower(msg); |
| 1243 | anc_data[2] = msg_nameupper(msg); |
| 1244 | break; |
| 1245 | case TIPC_CONN_MSG: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1246 | has_name = (tsk->conn_type != 0); |
| 1247 | anc_data[0] = tsk->conn_type; |
| 1248 | anc_data[1] = tsk->conn_instance; |
| 1249 | anc_data[2] = tsk->conn_instance; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1250 | break; |
| 1251 | default: |
Allan Stephens | 3546c75 | 2006-06-25 23:45:24 -0700 | [diff] [blame] | 1252 | has_name = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1253 | } |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 1254 | if (has_name) { |
| 1255 | res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data); |
| 1256 | if (res) |
| 1257 | return res; |
| 1258 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1259 | |
| 1260 | return 0; |
| 1261 | } |
| 1262 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1263 | 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] | 1264 | { |
| 1265 | struct sk_buff *buf = NULL; |
| 1266 | struct tipc_msg *msg; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1267 | u32 peer_port = tsk_peer_port(tsk); |
| 1268 | u32 dnode = tsk_peer_node(tsk); |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1269 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1270 | if (!tsk->connected) |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1271 | return; |
| 1272 | buf = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode, |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1273 | tipc_own_addr, peer_port, tsk->ref, TIPC_OK); |
Jon Paul Maloy | 739f5e4 | 2014-08-22 18:09:12 -0400 | [diff] [blame] | 1274 | if (!buf) |
| 1275 | return; |
| 1276 | msg = buf_msg(buf); |
| 1277 | msg_set_msgcnt(msg, ack); |
| 1278 | tipc_link_xmit(buf, dnode, msg_link_selector(msg)); |
| 1279 | } |
| 1280 | |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1281 | static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop) |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1282 | { |
| 1283 | struct sock *sk = sock->sk; |
| 1284 | DEFINE_WAIT(wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1285 | long timeo = *timeop; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1286 | int err; |
| 1287 | |
| 1288 | for (;;) { |
| 1289 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 1290 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1291 | if (sock->state == SS_DISCONNECTING) { |
| 1292 | err = -ENOTCONN; |
| 1293 | break; |
| 1294 | } |
| 1295 | release_sock(sk); |
| 1296 | timeo = schedule_timeout(timeo); |
| 1297 | lock_sock(sk); |
| 1298 | } |
| 1299 | err = 0; |
| 1300 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 1301 | break; |
| 1302 | err = sock_intr_errno(timeo); |
| 1303 | if (signal_pending(current)) |
| 1304 | break; |
| 1305 | err = -EAGAIN; |
| 1306 | if (!timeo) |
| 1307 | break; |
| 1308 | } |
| 1309 | finish_wait(sk_sleep(sk), &wait); |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1310 | *timeop = timeo; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1311 | return err; |
| 1312 | } |
| 1313 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1314 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1315 | * tipc_recvmsg - receive packet-oriented message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1316 | * @iocb: (unused) |
| 1317 | * @m: descriptor for message info |
| 1318 | * @buf_len: total size of user buffer area |
| 1319 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1320 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1321 | * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages. |
| 1322 | * If the complete message doesn't fit in user area, truncate it. |
| 1323 | * |
| 1324 | * Returns size of returned message data, errno otherwise |
| 1325 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1326 | static int tipc_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 1327 | struct msghdr *m, size_t buf_len, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1328 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1329 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1330 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1331 | struct sk_buff *buf; |
| 1332 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1333 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1334 | unsigned int sz; |
| 1335 | u32 err; |
| 1336 | int res; |
| 1337 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1338 | /* Catch invalid receive requests */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1339 | if (unlikely(!buf_len)) |
| 1340 | return -EINVAL; |
| 1341 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1342 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1343 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1344 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1345 | res = -ENOTCONN; |
| 1346 | goto exit; |
| 1347 | } |
| 1348 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1349 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1350 | restart: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1351 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1352 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1353 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1354 | if (res) |
| 1355 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1356 | |
| 1357 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1358 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1359 | msg = buf_msg(buf); |
| 1360 | sz = msg_data_sz(msg); |
| 1361 | err = msg_errcode(msg); |
| 1362 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1363 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1364 | if ((!sz) && (!err)) { |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1365 | tsk_advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1366 | goto restart; |
| 1367 | } |
| 1368 | |
| 1369 | /* Capture sender's address (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1370 | set_orig_addr(m, msg); |
| 1371 | |
| 1372 | /* Capture ancillary data (optional) */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1373 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1374 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1375 | goto exit; |
| 1376 | |
| 1377 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1378 | if (!err) { |
| 1379 | if (unlikely(buf_len < sz)) { |
| 1380 | sz = buf_len; |
| 1381 | m->msg_flags |= MSG_TRUNC; |
| 1382 | } |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 1383 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg), m, sz); |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1384 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1385 | goto exit; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1386 | res = sz; |
| 1387 | } else { |
| 1388 | if ((sock->state == SS_READY) || |
| 1389 | ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)) |
| 1390 | res = 0; |
| 1391 | else |
| 1392 | res = -ECONNRESET; |
| 1393 | } |
| 1394 | |
| 1395 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1396 | if (likely(!(flags & MSG_PEEK))) { |
Allan Stephens | 9900980 | 2008-04-15 00:06:12 -0700 | [diff] [blame] | 1397 | if ((sock->state != SS_READY) && |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1398 | (++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1399 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1400 | tsk->rcv_unacked = 0; |
| 1401 | } |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1402 | tsk_advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1403 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1404 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1405 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1406 | return res; |
| 1407 | } |
| 1408 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1409 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1410 | * tipc_recv_stream - receive stream-oriented data |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1411 | * @iocb: (unused) |
| 1412 | * @m: descriptor for message info |
| 1413 | * @buf_len: total size of user buffer area |
| 1414 | * @flags: receive flags |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1415 | * |
| 1416 | * Used for SOCK_STREAM messages only. If not enough data is available |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1417 | * will optionally wait for more; never truncates data. |
| 1418 | * |
| 1419 | * Returns size of returned message data, errno otherwise |
| 1420 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1421 | static int tipc_recv_stream(struct kiocb *iocb, struct socket *sock, |
| 1422 | struct msghdr *m, size_t buf_len, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1423 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1424 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1425 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1426 | struct sk_buff *buf; |
| 1427 | struct tipc_msg *msg; |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1428 | long timeo; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1429 | unsigned int sz; |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1430 | int sz_to_copy, target, needed; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1431 | int sz_copied = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1432 | u32 err; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1433 | int res = 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1434 | |
| 1435 | /* Catch invalid receive attempts */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1436 | if (unlikely(!buf_len)) |
| 1437 | return -EINVAL; |
| 1438 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1439 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1440 | |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1441 | if (unlikely(sock->state == SS_UNCONNECTED)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1442 | res = -ENOTCONN; |
| 1443 | goto exit; |
| 1444 | } |
| 1445 | |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1446 | target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1447 | timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 1448 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1449 | restart: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1450 | /* Look for a message in receive queue; wait if necessary */ |
Arnaldo Carvalho de Melo | 85d3fc9 | 2014-05-23 15:55:12 -0400 | [diff] [blame] | 1451 | res = tipc_wait_for_rcvmsg(sock, &timeo); |
Ying Xue | 9bbb4ec | 2014-01-17 09:50:07 +0800 | [diff] [blame] | 1452 | if (res) |
| 1453 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1454 | |
| 1455 | /* Look at first message in receive queue */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1456 | buf = skb_peek(&sk->sk_receive_queue); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1457 | msg = buf_msg(buf); |
| 1458 | sz = msg_data_sz(msg); |
| 1459 | err = msg_errcode(msg); |
| 1460 | |
| 1461 | /* Discard an empty non-errored message & try again */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1462 | if ((!sz) && (!err)) { |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1463 | tsk_advance_rx_queue(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1464 | goto restart; |
| 1465 | } |
| 1466 | |
| 1467 | /* Optionally capture sender's address & ancillary data of first msg */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1468 | if (sz_copied == 0) { |
| 1469 | set_orig_addr(m, msg); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1470 | res = tipc_sk_anc_data_recv(m, msg, tsk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1471 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1472 | goto exit; |
| 1473 | } |
| 1474 | |
| 1475 | /* Capture message data (if valid) & compute return value (always) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1476 | if (!err) { |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1477 | u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1478 | |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1479 | sz -= offset; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1480 | needed = (buf_len - sz_copied); |
| 1481 | sz_to_copy = (sz <= needed) ? sz : needed; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1482 | |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 1483 | res = skb_copy_datagram_msg(buf, msg_hdr_sz(msg) + offset, |
| 1484 | m, sz_to_copy); |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1485 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1486 | goto exit; |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1487 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1488 | sz_copied += sz_to_copy; |
| 1489 | |
| 1490 | if (sz_to_copy < sz) { |
| 1491 | if (!(flags & MSG_PEEK)) |
Allan Stephens | 0232fd0 | 2011-02-21 09:45:40 -0500 | [diff] [blame] | 1492 | TIPC_SKB_CB(buf)->handle = |
| 1493 | (void *)(unsigned long)(offset + sz_to_copy); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1494 | goto exit; |
| 1495 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1496 | } else { |
| 1497 | if (sz_copied != 0) |
| 1498 | goto exit; /* can't add error msg to valid data */ |
| 1499 | |
| 1500 | if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control) |
| 1501 | res = 0; |
| 1502 | else |
| 1503 | res = -ECONNRESET; |
| 1504 | } |
| 1505 | |
| 1506 | /* Consume received message (optional) */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1507 | if (likely(!(flags & MSG_PEEK))) { |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1508 | if (unlikely(++tsk->rcv_unacked >= TIPC_CONNACK_INTV)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1509 | tipc_sk_send_ack(tsk, tsk->rcv_unacked); |
Jon Paul Maloy | 6012052 | 2014-06-25 20:41:42 -0500 | [diff] [blame] | 1510 | tsk->rcv_unacked = 0; |
| 1511 | } |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1512 | tsk_advance_rx_queue(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1513 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1514 | |
| 1515 | /* Loop around if more data is required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1516 | if ((sz_copied < buf_len) && /* didn't get all requested data */ |
| 1517 | (!skb_queue_empty(&sk->sk_receive_queue) || |
Florian Westphal | 3720d40 | 2010-08-17 11:00:04 +0000 | [diff] [blame] | 1518 | (sz_copied < target)) && /* and more is ready or required */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1519 | (!(flags & MSG_PEEK)) && /* and aren't just peeking at data */ |
| 1520 | (!err)) /* and haven't reached a FIN */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1521 | goto restart; |
| 1522 | |
| 1523 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1524 | release_sock(sk); |
Allan Stephens | a3b0a5a | 2006-06-25 23:48:22 -0700 | [diff] [blame] | 1525 | return sz_copied ? sz_copied : res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1526 | } |
| 1527 | |
| 1528 | /** |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1529 | * tipc_write_space - wake up thread if port congestion is released |
| 1530 | * @sk: socket |
| 1531 | */ |
| 1532 | static void tipc_write_space(struct sock *sk) |
| 1533 | { |
| 1534 | struct socket_wq *wq; |
| 1535 | |
| 1536 | rcu_read_lock(); |
| 1537 | wq = rcu_dereference(sk->sk_wq); |
| 1538 | if (wq_has_sleeper(wq)) |
| 1539 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | |
| 1540 | POLLWRNORM | POLLWRBAND); |
| 1541 | rcu_read_unlock(); |
| 1542 | } |
| 1543 | |
| 1544 | /** |
| 1545 | * tipc_data_ready - wake up threads to indicate messages have been received |
| 1546 | * @sk: socket |
| 1547 | * @len: the length of messages |
| 1548 | */ |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1549 | static void tipc_data_ready(struct sock *sk) |
Ying Xue | f288bef | 2012-08-21 11:16:57 +0800 | [diff] [blame] | 1550 | { |
| 1551 | struct socket_wq *wq; |
| 1552 | |
| 1553 | rcu_read_lock(); |
| 1554 | wq = rcu_dereference(sk->sk_wq); |
| 1555 | if (wq_has_sleeper(wq)) |
| 1556 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
| 1557 | POLLRDNORM | POLLRDBAND); |
| 1558 | rcu_read_unlock(); |
| 1559 | } |
| 1560 | |
| 1561 | /** |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1562 | * filter_connect - Handle all incoming messages for a connection-based socket |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1563 | * @tsk: TIPC socket |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1564 | * @msg: message |
| 1565 | * |
stephen hemminger | b2ad5e5 | 2014-10-29 22:58:51 -0700 | [diff] [blame] | 1566 | * Returns 0 (TIPC_OK) if everything ok, -TIPC_ERR_NO_PORT otherwise |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1567 | */ |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1568 | static int filter_connect(struct tipc_sock *tsk, struct sk_buff **buf) |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1569 | { |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1570 | struct sock *sk = &tsk->sk; |
Jon Paul Maloy | 8826cde | 2014-03-12 11:31:09 -0400 | [diff] [blame] | 1571 | struct socket *sock = sk->sk_socket; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1572 | struct tipc_msg *msg = buf_msg(*buf); |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1573 | int retval = -TIPC_ERR_NO_PORT; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1574 | |
| 1575 | if (msg_mcast(msg)) |
| 1576 | return retval; |
| 1577 | |
| 1578 | switch ((int)sock->state) { |
| 1579 | case SS_CONNECTED: |
| 1580 | /* Accept only connection-based messages sent by peer */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 1581 | if (tsk_peer_msg(tsk, msg)) { |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1582 | if (unlikely(msg_errcode(msg))) { |
| 1583 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1584 | tsk->connected = 0; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1585 | /* let timer expire on it's own */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1586 | tipc_node_remove_conn(tsk_peer_node(tsk), |
| 1587 | tsk->ref); |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1588 | } |
| 1589 | retval = TIPC_OK; |
| 1590 | } |
| 1591 | break; |
| 1592 | case SS_CONNECTING: |
| 1593 | /* Accept only ACK or NACK message */ |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1594 | |
| 1595 | if (unlikely(!msg_connected(msg))) |
| 1596 | break; |
| 1597 | |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1598 | if (unlikely(msg_errcode(msg))) { |
| 1599 | sock->state = SS_DISCONNECTING; |
Erik Hugne | 2c8d851 | 2013-08-28 09:29:58 +0200 | [diff] [blame] | 1600 | sk->sk_err = ECONNREFUSED; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1601 | retval = TIPC_OK; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1602 | break; |
| 1603 | } |
| 1604 | |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1605 | if (unlikely(msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)) { |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1606 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1607 | sk->sk_err = EINVAL; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1608 | retval = TIPC_OK; |
| 1609 | break; |
| 1610 | } |
| 1611 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1612 | tipc_sk_finish_conn(tsk, msg_origport(msg), msg_orignode(msg)); |
| 1613 | msg_set_importance(&tsk->phdr, msg_importance(msg)); |
Jon Paul Maloy | dadebc0 | 2014-08-22 18:09:11 -0400 | [diff] [blame] | 1614 | sock->state = SS_CONNECTED; |
| 1615 | |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1616 | /* If an incoming message is an 'ACK-', it should be |
| 1617 | * discarded here because it doesn't contain useful |
| 1618 | * data. In addition, we should try to wake up |
| 1619 | * connect() routine if sleeping. |
| 1620 | */ |
| 1621 | if (msg_data_sz(msg) == 0) { |
| 1622 | kfree_skb(*buf); |
| 1623 | *buf = NULL; |
| 1624 | if (waitqueue_active(sk_sleep(sk))) |
| 1625 | wake_up_interruptible(sk_sleep(sk)); |
| 1626 | } |
| 1627 | retval = TIPC_OK; |
Ying Xue | 7e6c131 | 2012-11-29 18:39:14 -0500 | [diff] [blame] | 1628 | break; |
| 1629 | case SS_LISTENING: |
| 1630 | case SS_UNCONNECTED: |
| 1631 | /* Accept only SYN message */ |
| 1632 | if (!msg_connected(msg) && !(msg_errcode(msg))) |
| 1633 | retval = TIPC_OK; |
| 1634 | break; |
| 1635 | case SS_DISCONNECTING: |
| 1636 | break; |
| 1637 | default: |
| 1638 | pr_err("Unknown socket state %u\n", sock->state); |
| 1639 | } |
| 1640 | return retval; |
| 1641 | } |
| 1642 | |
| 1643 | /** |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1644 | * rcvbuf_limit - get proper overload limit of socket receive queue |
| 1645 | * @sk: socket |
| 1646 | * @buf: message |
| 1647 | * |
| 1648 | * For all connection oriented messages, irrespective of importance, |
| 1649 | * the default overload value (i.e. 67MB) is set as limit. |
| 1650 | * |
| 1651 | * For all connectionless messages, by default new queue limits are |
| 1652 | * as belows: |
| 1653 | * |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 1654 | * TIPC_LOW_IMPORTANCE (4 MB) |
| 1655 | * TIPC_MEDIUM_IMPORTANCE (8 MB) |
| 1656 | * TIPC_HIGH_IMPORTANCE (16 MB) |
| 1657 | * TIPC_CRITICAL_IMPORTANCE (32 MB) |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1658 | * |
| 1659 | * Returns overload limit according to corresponding message importance |
| 1660 | */ |
| 1661 | static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *buf) |
| 1662 | { |
| 1663 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1664 | |
| 1665 | if (msg_connected(msg)) |
wangweidong | 0cee6bb | 2013-12-12 09:36:39 +0800 | [diff] [blame] | 1666 | return sysctl_tipc_rmem[2]; |
| 1667 | |
| 1668 | return sk->sk_rcvbuf >> TIPC_CRITICAL_IMPORTANCE << |
| 1669 | msg_importance(msg); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1670 | } |
| 1671 | |
| 1672 | /** |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1673 | * filter_rcv - validate incoming message |
| 1674 | * @sk: socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1675 | * @buf: message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1676 | * |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1677 | * Enqueues message on receive queue if acceptable; optionally handles |
| 1678 | * disconnect indication for a connected socket. |
| 1679 | * |
| 1680 | * Called with socket lock already taken; port lock may also be taken. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1681 | * |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1682 | * Returns 0 (TIPC_OK) if message was consumed, -TIPC error code if message |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1683 | * to be rejected, 1 (TIPC_FWD_MSG) if (CONN_MANAGER) message to be forwarded |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1684 | */ |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1685 | static int filter_rcv(struct sock *sk, struct sk_buff *buf) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1686 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1687 | struct socket *sock = sk->sk_socket; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 1688 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1689 | struct tipc_msg *msg = buf_msg(buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1690 | unsigned int limit = rcvbuf_limit(sk, buf); |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1691 | u32 onode; |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1692 | int rc = TIPC_OK; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1693 | |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1694 | if (unlikely(msg_user(msg) == CONN_MANAGER)) |
| 1695 | return tipc_sk_proto_rcv(tsk, &onode, buf); |
Jon Paul Maloy | ec8a2e5 | 2014-06-25 20:41:40 -0500 | [diff] [blame] | 1696 | |
Jon Paul Maloy | 50100a5 | 2014-08-22 18:09:07 -0400 | [diff] [blame] | 1697 | if (unlikely(msg_user(msg) == SOCK_WAKEUP)) { |
| 1698 | kfree_skb(buf); |
| 1699 | tsk->link_cong = 0; |
| 1700 | sk->sk_write_space(sk); |
| 1701 | return TIPC_OK; |
| 1702 | } |
| 1703 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1704 | /* Reject message if it is wrong sort of message for socket */ |
Allan Stephens | aad5854 | 2012-04-26 18:13:08 -0400 | [diff] [blame] | 1705 | if (msg_type(msg) > TIPC_DIRECT_MSG) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1706 | return -TIPC_ERR_NO_PORT; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1707 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1708 | if (sock->state == SS_READY) { |
Allan Stephens | b29f142 | 2010-12-31 18:59:25 +0000 | [diff] [blame] | 1709 | if (msg_connected(msg)) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1710 | return -TIPC_ERR_NO_PORT; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1711 | } else { |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1712 | rc = filter_connect(tsk, &buf); |
| 1713 | if (rc != TIPC_OK || buf == NULL) |
| 1714 | return rc; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1715 | } |
| 1716 | |
| 1717 | /* Reject message if there isn't room to queue it */ |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1718 | if (sk_rmem_alloc_get(sk) + buf->truesize >= limit) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1719 | return -TIPC_ERR_OVERLOAD; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1720 | |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1721 | /* Enqueue message */ |
Ying Xue | 4068243 | 2013-10-18 07:23:16 +0200 | [diff] [blame] | 1722 | TIPC_SKB_CB(buf)->handle = NULL; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1723 | __skb_queue_tail(&sk->sk_receive_queue, buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 1724 | skb_set_owner_r(buf, sk); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1725 | |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 1726 | sk->sk_data_ready(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1727 | return TIPC_OK; |
| 1728 | } |
| 1729 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1730 | /** |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1731 | * tipc_backlog_rcv - handle incoming message from backlog queue |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1732 | * @sk: socket |
| 1733 | * @buf: message |
| 1734 | * |
| 1735 | * Caller must hold socket lock, but not port lock. |
| 1736 | * |
| 1737 | * Returns 0 |
| 1738 | */ |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1739 | static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1740 | { |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1741 | int rc; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1742 | u32 onode; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1743 | struct tipc_sock *tsk = tipc_sk(sk); |
Jon Paul Maloy | 02c00c2 | 2014-06-09 11:08:18 -0500 | [diff] [blame] | 1744 | uint truesize = buf->truesize; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1745 | |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1746 | rc = filter_rcv(sk, buf); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1747 | |
Jon Paul Maloy | ac0074e | 2014-06-25 20:41:41 -0500 | [diff] [blame] | 1748 | if (likely(!rc)) { |
| 1749 | if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT) |
| 1750 | atomic_add(truesize, &tsk->dupl_rcvcnt); |
| 1751 | return 0; |
| 1752 | } |
| 1753 | |
| 1754 | if ((rc < 0) && !tipc_msg_reverse(buf, &onode, -rc)) |
| 1755 | return 0; |
| 1756 | |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1757 | tipc_link_xmit(buf, onode, 0); |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1758 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1759 | return 0; |
| 1760 | } |
| 1761 | |
| 1762 | /** |
Jon Paul Maloy | 24be34b | 2014-03-12 11:31:10 -0400 | [diff] [blame] | 1763 | * tipc_sk_rcv - handle incoming message |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1764 | * @buf: buffer containing arriving message |
| 1765 | * Consumes buffer |
| 1766 | * Returns 0 if success, or errno: -EHOSTUNREACH |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1767 | */ |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1768 | int tipc_sk_rcv(struct sk_buff *buf) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1769 | { |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1770 | struct tipc_sock *tsk; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1771 | struct sock *sk; |
| 1772 | u32 dport = msg_destport(buf_msg(buf)); |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1773 | int rc = TIPC_OK; |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1774 | uint limit; |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1775 | u32 dnode; |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1776 | |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1777 | /* Validate destination and message */ |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 1778 | tsk = tipc_sk_get(dport); |
Jon Paul Maloy | 9b50fd0 | 2014-08-22 18:09:15 -0400 | [diff] [blame] | 1779 | if (unlikely(!tsk)) { |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1780 | rc = tipc_msg_eval(buf, &dnode); |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1781 | goto exit; |
| 1782 | } |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1783 | sk = &tsk->sk; |
| 1784 | |
| 1785 | /* Queue message */ |
Ying Xue | 1a194c2 | 2014-10-20 14:46:35 +0800 | [diff] [blame] | 1786 | spin_lock_bh(&sk->sk_lock.slock); |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1787 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1788 | if (!sock_owned_by_user(sk)) { |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1789 | rc = filter_rcv(sk, buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1790 | } else { |
Jon Paul Maloy | 4f4482d | 2014-05-14 05:39:09 -0400 | [diff] [blame] | 1791 | if (sk->sk_backlog.len == 0) |
| 1792 | atomic_set(&tsk->dupl_rcvcnt, 0); |
| 1793 | limit = rcvbuf_limit(sk, buf) + atomic_read(&tsk->dupl_rcvcnt); |
| 1794 | if (sk_add_backlog(sk, buf, limit)) |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1795 | rc = -TIPC_ERR_OVERLOAD; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1796 | } |
Ying Xue | 1a194c2 | 2014-10-20 14:46:35 +0800 | [diff] [blame] | 1797 | spin_unlock_bh(&sk->sk_lock.slock); |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 1798 | tipc_sk_put(tsk); |
Jon Paul Maloy | e4de5fa | 2014-06-25 20:41:31 -0500 | [diff] [blame] | 1799 | if (likely(!rc)) |
Jon Paul Maloy | 9816f06 | 2014-05-14 05:39:15 -0400 | [diff] [blame] | 1800 | return 0; |
| 1801 | exit: |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1802 | if ((rc < 0) && !tipc_msg_reverse(buf, &dnode, -rc)) |
Jon Paul Maloy | 8db1bae | 2014-06-25 20:41:35 -0500 | [diff] [blame] | 1803 | return -EHOSTUNREACH; |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1804 | |
Jon Paul Maloy | 9fbfb8b | 2014-07-16 20:41:03 -0400 | [diff] [blame] | 1805 | tipc_link_xmit(buf, dnode, 0); |
Jon Paul Maloy | 5a37907 | 2014-06-25 20:41:36 -0500 | [diff] [blame] | 1806 | return (rc < 0) ? -EHOSTUNREACH : 0; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1807 | } |
| 1808 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1809 | static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) |
| 1810 | { |
| 1811 | struct sock *sk = sock->sk; |
| 1812 | DEFINE_WAIT(wait); |
| 1813 | int done; |
| 1814 | |
| 1815 | do { |
| 1816 | int err = sock_error(sk); |
| 1817 | if (err) |
| 1818 | return err; |
| 1819 | if (!*timeo_p) |
| 1820 | return -ETIMEDOUT; |
| 1821 | if (signal_pending(current)) |
| 1822 | return sock_intr_errno(*timeo_p); |
| 1823 | |
| 1824 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
| 1825 | done = sk_wait_event(sk, timeo_p, sock->state != SS_CONNECTING); |
| 1826 | finish_wait(sk_sleep(sk), &wait); |
| 1827 | } while (!done); |
| 1828 | return 0; |
| 1829 | } |
| 1830 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1831 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1832 | * tipc_connect - establish a connection to another TIPC port |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1833 | * @sock: socket structure |
| 1834 | * @dest: socket address for destination port |
| 1835 | * @destlen: size of socket address data structure |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1836 | * @flags: file-related flags associated with socket |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1837 | * |
| 1838 | * Returns 0 on success, errno otherwise |
| 1839 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1840 | static int tipc_connect(struct socket *sock, struct sockaddr *dest, |
| 1841 | int destlen, int flags) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1842 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1843 | struct sock *sk = sock->sk; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1844 | struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest; |
| 1845 | struct msghdr m = {NULL,}; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1846 | long timeout = (flags & O_NONBLOCK) ? 0 : tipc_sk(sk)->conn_timeout; |
| 1847 | socket_state previous; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1848 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1849 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1850 | lock_sock(sk); |
| 1851 | |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1852 | /* 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] | 1853 | if (sock->state == SS_READY) { |
| 1854 | res = -EOPNOTSUPP; |
| 1855 | goto exit; |
| 1856 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1857 | |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1858 | /* |
| 1859 | * Reject connection attempt using multicast address |
| 1860 | * |
| 1861 | * Note: send_msg() validates the rest of the address fields, |
| 1862 | * so there's no need to do it here |
| 1863 | */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1864 | if (dst->addrtype == TIPC_ADDR_MCAST) { |
| 1865 | res = -EINVAL; |
| 1866 | goto exit; |
| 1867 | } |
| 1868 | |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1869 | previous = sock->state; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1870 | switch (sock->state) { |
| 1871 | case SS_UNCONNECTED: |
| 1872 | /* Send a 'SYN-' to destination */ |
| 1873 | m.msg_name = dest; |
| 1874 | m.msg_namelen = destlen; |
| 1875 | |
| 1876 | /* If connect is in non-blocking case, set MSG_DONTWAIT to |
| 1877 | * indicate send_msg() is never blocked. |
| 1878 | */ |
| 1879 | if (!timeout) |
| 1880 | m.msg_flags = MSG_DONTWAIT; |
| 1881 | |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1882 | res = tipc_sendmsg(NULL, sock, &m, 0); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1883 | if ((res < 0) && (res != -EWOULDBLOCK)) |
| 1884 | goto exit; |
| 1885 | |
| 1886 | /* Just entered SS_CONNECTING state; the only |
| 1887 | * difference is that return value in non-blocking |
| 1888 | * case is EINPROGRESS, rather than EALREADY. |
| 1889 | */ |
| 1890 | res = -EINPROGRESS; |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1891 | case SS_CONNECTING: |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1892 | if (previous == SS_CONNECTING) |
| 1893 | res = -EALREADY; |
| 1894 | if (!timeout) |
| 1895 | goto exit; |
| 1896 | timeout = msecs_to_jiffies(timeout); |
| 1897 | /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */ |
| 1898 | res = tipc_wait_for_connect(sock, &timeout); |
Ying Xue | 584d24b | 2012-11-29 18:51:19 -0500 | [diff] [blame] | 1899 | break; |
| 1900 | case SS_CONNECTED: |
| 1901 | res = -EISCONN; |
| 1902 | break; |
| 1903 | default: |
| 1904 | res = -EINVAL; |
Ying Xue | 78eb3a5 | 2014-01-17 09:50:03 +0800 | [diff] [blame] | 1905 | break; |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1906 | } |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1907 | exit: |
| 1908 | release_sock(sk); |
Allan Stephens | b89741a | 2008-04-15 00:20:37 -0700 | [diff] [blame] | 1909 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1910 | } |
| 1911 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1912 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1913 | * tipc_listen - allow socket to listen for incoming connections |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1914 | * @sock: socket structure |
| 1915 | * @len: (unused) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1916 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1917 | * Returns 0 on success, errno otherwise |
| 1918 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1919 | static int tipc_listen(struct socket *sock, int len) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1920 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1921 | struct sock *sk = sock->sk; |
| 1922 | int res; |
| 1923 | |
| 1924 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1925 | |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 1926 | if (sock->state != SS_UNCONNECTED) |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1927 | res = -EINVAL; |
| 1928 | else { |
| 1929 | sock->state = SS_LISTENING; |
| 1930 | res = 0; |
| 1931 | } |
| 1932 | |
| 1933 | release_sock(sk); |
| 1934 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1935 | } |
| 1936 | |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1937 | static int tipc_wait_for_accept(struct socket *sock, long timeo) |
| 1938 | { |
| 1939 | struct sock *sk = sock->sk; |
| 1940 | DEFINE_WAIT(wait); |
| 1941 | int err; |
| 1942 | |
| 1943 | /* True wake-one mechanism for incoming connections: only |
| 1944 | * one process gets woken up, not the 'whole herd'. |
| 1945 | * Since we do not 'race & poll' for established sockets |
| 1946 | * anymore, the common case will execute the loop only once. |
| 1947 | */ |
| 1948 | for (;;) { |
| 1949 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, |
| 1950 | TASK_INTERRUPTIBLE); |
Ying Xue | fe8e464 | 2014-03-06 14:40:18 +0100 | [diff] [blame] | 1951 | if (timeo && skb_queue_empty(&sk->sk_receive_queue)) { |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1952 | release_sock(sk); |
| 1953 | timeo = schedule_timeout(timeo); |
| 1954 | lock_sock(sk); |
| 1955 | } |
| 1956 | err = 0; |
| 1957 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 1958 | break; |
| 1959 | err = -EINVAL; |
| 1960 | if (sock->state != SS_LISTENING) |
| 1961 | break; |
| 1962 | err = sock_intr_errno(timeo); |
| 1963 | if (signal_pending(current)) |
| 1964 | break; |
| 1965 | err = -EAGAIN; |
| 1966 | if (!timeo) |
| 1967 | break; |
| 1968 | } |
| 1969 | finish_wait(sk_sleep(sk), &wait); |
| 1970 | return err; |
| 1971 | } |
| 1972 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1973 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1974 | * tipc_accept - wait for connection request |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1975 | * @sock: listening socket |
| 1976 | * @newsock: new socket that is to be connected |
| 1977 | * @flags: file-related flags associated with socket |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1978 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1979 | * Returns 0 on success, errno otherwise |
| 1980 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 1981 | 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] | 1982 | { |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1983 | struct sock *new_sk, *sk = sock->sk; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1984 | struct sk_buff *buf; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 1985 | struct tipc_sock *new_tsock; |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 1986 | struct tipc_msg *msg; |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1987 | long timeo; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1988 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1989 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1990 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 1991 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 1992 | if (sock->state != SS_LISTENING) { |
| 1993 | res = -EINVAL; |
| 1994 | goto exit; |
| 1995 | } |
Ying Xue | 6398e23 | 2014-01-17 09:50:04 +0800 | [diff] [blame] | 1996 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 1997 | res = tipc_wait_for_accept(sock, timeo); |
| 1998 | if (res) |
| 1999 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2000 | |
| 2001 | buf = skb_peek(&sk->sk_receive_queue); |
| 2002 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2003 | res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 1); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2004 | if (res) |
| 2005 | goto exit; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2006 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2007 | new_sk = new_sock->sk; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2008 | new_tsock = tipc_sk(new_sk); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2009 | msg = buf_msg(buf); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2010 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2011 | /* we lock on new_sk; but lockdep sees the lock on sk */ |
| 2012 | lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2013 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2014 | /* |
| 2015 | * Reject any stray messages received by new socket |
| 2016 | * before the socket lock was taken (very, very unlikely) |
| 2017 | */ |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 2018 | tsk_rej_rx_queue(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2019 | |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2020 | /* Connect new socket to it's peer */ |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2021 | tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg)); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2022 | new_sock->state = SS_CONNECTED; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2023 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2024 | tsk_set_importance(new_tsock, msg_importance(msg)); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2025 | if (msg_named(msg)) { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2026 | new_tsock->conn_type = msg_nametype(msg); |
| 2027 | new_tsock->conn_instance = msg_nameinst(msg); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2028 | } |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2029 | |
| 2030 | /* |
| 2031 | * Respond to 'SYN-' by discarding it & returning 'ACK'-. |
| 2032 | * Respond to 'SYN+' by queuing it on new socket. |
| 2033 | */ |
| 2034 | if (!msg_data_sz(msg)) { |
| 2035 | struct msghdr m = {NULL,}; |
| 2036 | |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 2037 | tsk_advance_rx_queue(sk); |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2038 | tipc_send_packet(NULL, new_sock, &m, 0); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2039 | } else { |
| 2040 | __skb_dequeue(&sk->sk_receive_queue); |
| 2041 | __skb_queue_head(&new_sk->sk_receive_queue, buf); |
Ying Xue | aba79f3 | 2013-01-20 23:30:09 +0100 | [diff] [blame] | 2042 | skb_set_owner_r(buf, new_sk); |
Paul Gortmaker | 0fef8f2 | 2012-12-04 11:01:55 -0500 | [diff] [blame] | 2043 | } |
| 2044 | release_sock(new_sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2045 | exit: |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2046 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2047 | return res; |
| 2048 | } |
| 2049 | |
| 2050 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2051 | * tipc_shutdown - shutdown socket connection |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2052 | * @sock: socket structure |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 2053 | * @how: direction to close (must be SHUT_RDWR) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2054 | * |
| 2055 | * Terminates connection (if necessary), then purges socket's receive queue. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2056 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2057 | * Returns 0 on success, errno otherwise |
| 2058 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2059 | static int tipc_shutdown(struct socket *sock, int how) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2060 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2061 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2062 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2063 | struct sk_buff *buf; |
Jon Paul Maloy | 80e44c2 | 2014-08-22 18:09:10 -0400 | [diff] [blame] | 2064 | u32 dnode; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2065 | int res; |
| 2066 | |
Allan Stephens | e247a8f | 2008-03-06 15:05:38 -0800 | [diff] [blame] | 2067 | if (how != SHUT_RDWR) |
| 2068 | return -EINVAL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2069 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2070 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2071 | |
| 2072 | switch (sock->state) { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2073 | case SS_CONNECTING: |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2074 | case SS_CONNECTED: |
| 2075 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2076 | restart: |
Paul Gortmaker | 617d3c7 | 2012-04-30 15:29:02 -0400 | [diff] [blame] | 2077 | /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2078 | buf = __skb_dequeue(&sk->sk_receive_queue); |
| 2079 | if (buf) { |
Ying Xue | 4068243 | 2013-10-18 07:23:16 +0200 | [diff] [blame] | 2080 | if (TIPC_SKB_CB(buf)->handle != NULL) { |
Allan Stephens | 5f6d912 | 2011-11-04 13:24:29 -0400 | [diff] [blame] | 2081 | kfree_skb(buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2082 | goto restart; |
| 2083 | } |
Jon Paul Maloy | 80e44c2 | 2014-08-22 18:09:10 -0400 | [diff] [blame] | 2084 | if (tipc_msg_reverse(buf, &dnode, TIPC_CONN_SHUTDOWN)) |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2085 | tipc_link_xmit(buf, dnode, tsk->ref); |
| 2086 | tipc_node_remove_conn(dnode, tsk->ref); |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2087 | } else { |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2088 | dnode = tsk_peer_node(tsk); |
Jon Paul Maloy | 80e44c2 | 2014-08-22 18:09:10 -0400 | [diff] [blame] | 2089 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, |
| 2090 | TIPC_CONN_MSG, SHORT_H_SIZE, |
| 2091 | 0, dnode, tipc_own_addr, |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2092 | tsk_peer_port(tsk), |
| 2093 | tsk->ref, TIPC_CONN_SHUTDOWN); |
| 2094 | tipc_link_xmit(buf, dnode, tsk->ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2095 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2096 | tsk->connected = 0; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2097 | sock->state = SS_DISCONNECTING; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2098 | tipc_node_remove_conn(dnode, tsk->ref); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2099 | /* fall through */ |
| 2100 | |
| 2101 | case SS_DISCONNECTING: |
| 2102 | |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 2103 | /* Discard any unreceived messages */ |
Ying Xue | 57467e5 | 2013-01-20 23:30:08 +0100 | [diff] [blame] | 2104 | __skb_queue_purge(&sk->sk_receive_queue); |
Ying Xue | 7503115 | 2012-10-29 09:38:15 -0400 | [diff] [blame] | 2105 | |
| 2106 | /* Wake up anyone sleeping in poll */ |
| 2107 | sk->sk_state_change(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2108 | res = 0; |
| 2109 | break; |
| 2110 | |
| 2111 | default: |
| 2112 | res = -ENOTCONN; |
| 2113 | } |
| 2114 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2115 | release_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2116 | return res; |
| 2117 | } |
| 2118 | |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2119 | static void tipc_sk_timeout(unsigned long ref) |
| 2120 | { |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2121 | struct tipc_sock *tsk; |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2122 | struct sock *sk; |
| 2123 | struct sk_buff *buf = NULL; |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2124 | u32 peer_port, peer_node; |
| 2125 | |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2126 | tsk = tipc_sk_get(ref); |
Jon Paul Maloy | 9b50fd0 | 2014-08-22 18:09:15 -0400 | [diff] [blame] | 2127 | if (!tsk) |
Ying Xue | cc086fc | 2014-08-28 10:02:41 +0800 | [diff] [blame] | 2128 | return; |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2129 | |
Ying Xue | cc086fc | 2014-08-28 10:02:41 +0800 | [diff] [blame] | 2130 | sk = &tsk->sk; |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2131 | bh_lock_sock(sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2132 | if (!tsk->connected) { |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2133 | bh_unlock_sock(sk); |
| 2134 | goto exit; |
| 2135 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2136 | peer_port = tsk_peer_port(tsk); |
| 2137 | peer_node = tsk_peer_node(tsk); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2138 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2139 | if (tsk->probing_state == TIPC_CONN_PROBING) { |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2140 | /* Previous probe not answered -> self abort */ |
| 2141 | buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, |
| 2142 | SHORT_H_SIZE, 0, tipc_own_addr, |
| 2143 | peer_node, ref, peer_port, |
| 2144 | TIPC_ERR_NO_PORT); |
| 2145 | } else { |
| 2146 | buf = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, |
| 2147 | 0, peer_node, tipc_own_addr, |
| 2148 | peer_port, ref, TIPC_OK); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2149 | tsk->probing_state = TIPC_CONN_PROBING; |
| 2150 | k_start_timer(&tsk->timer, tsk->probing_interval); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2151 | } |
| 2152 | bh_unlock_sock(sk); |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2153 | if (buf) |
| 2154 | tipc_link_xmit(buf, peer_node, ref); |
| 2155 | exit: |
| 2156 | tipc_sk_put(tsk); |
Jon Paul Maloy | 5728901 | 2014-08-22 18:09:09 -0400 | [diff] [blame] | 2157 | } |
| 2158 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2159 | static int tipc_sk_publish(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2160 | struct tipc_name_seq const *seq) |
| 2161 | { |
| 2162 | struct publication *publ; |
| 2163 | u32 key; |
| 2164 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2165 | if (tsk->connected) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2166 | return -EINVAL; |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2167 | key = tsk->ref + tsk->pub_count + 1; |
| 2168 | if (key == tsk->ref) |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2169 | return -EADDRINUSE; |
| 2170 | |
| 2171 | publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper, |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2172 | scope, tsk->ref, key); |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2173 | if (unlikely(!publ)) |
| 2174 | return -EINVAL; |
| 2175 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2176 | list_add(&publ->pport_list, &tsk->publications); |
| 2177 | tsk->pub_count++; |
| 2178 | tsk->published = 1; |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2179 | return 0; |
| 2180 | } |
| 2181 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2182 | static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope, |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2183 | struct tipc_name_seq const *seq) |
| 2184 | { |
| 2185 | struct publication *publ; |
| 2186 | struct publication *safe; |
| 2187 | int rc = -EINVAL; |
| 2188 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2189 | list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) { |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2190 | if (seq) { |
| 2191 | if (publ->scope != scope) |
| 2192 | continue; |
| 2193 | if (publ->type != seq->type) |
| 2194 | continue; |
| 2195 | if (publ->lower != seq->lower) |
| 2196 | continue; |
| 2197 | if (publ->upper != seq->upper) |
| 2198 | break; |
| 2199 | tipc_nametbl_withdraw(publ->type, publ->lower, |
| 2200 | publ->ref, publ->key); |
| 2201 | rc = 0; |
| 2202 | break; |
| 2203 | } |
| 2204 | tipc_nametbl_withdraw(publ->type, publ->lower, |
| 2205 | publ->ref, publ->key); |
| 2206 | rc = 0; |
| 2207 | } |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2208 | if (list_empty(&tsk->publications)) |
| 2209 | tsk->published = 0; |
Jon Paul Maloy | 0fc87aa | 2014-08-22 18:09:17 -0400 | [diff] [blame] | 2210 | return rc; |
| 2211 | } |
| 2212 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2213 | static int tipc_sk_show(struct tipc_sock *tsk, char *buf, |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2214 | int len, int full_id) |
| 2215 | { |
| 2216 | struct publication *publ; |
| 2217 | int ret; |
| 2218 | |
| 2219 | if (full_id) |
| 2220 | ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:", |
| 2221 | tipc_zone(tipc_own_addr), |
| 2222 | tipc_cluster(tipc_own_addr), |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2223 | tipc_node(tipc_own_addr), tsk->ref); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2224 | else |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2225 | ret = tipc_snprintf(buf, len, "%-10u:", tsk->ref); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2226 | |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2227 | if (tsk->connected) { |
| 2228 | u32 dport = tsk_peer_port(tsk); |
| 2229 | u32 destnode = tsk_peer_node(tsk); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2230 | |
| 2231 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2232 | " connected to <%u.%u.%u:%u>", |
| 2233 | tipc_zone(destnode), |
| 2234 | tipc_cluster(destnode), |
| 2235 | tipc_node(destnode), dport); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2236 | if (tsk->conn_type != 0) |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2237 | ret += tipc_snprintf(buf + ret, len - ret, |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2238 | " via {%u,%u}", tsk->conn_type, |
| 2239 | tsk->conn_instance); |
| 2240 | } else if (tsk->published) { |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2241 | ret += tipc_snprintf(buf + ret, len - ret, " bound to"); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2242 | list_for_each_entry(publ, &tsk->publications, pport_list) { |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2243 | if (publ->lower == publ->upper) |
| 2244 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2245 | " {%u,%u}", publ->type, |
| 2246 | publ->lower); |
| 2247 | else |
| 2248 | ret += tipc_snprintf(buf + ret, len - ret, |
| 2249 | " {%u,%u,%u}", publ->type, |
| 2250 | publ->lower, publ->upper); |
| 2251 | } |
| 2252 | } |
| 2253 | ret += tipc_snprintf(buf + ret, len - ret, "\n"); |
| 2254 | return ret; |
| 2255 | } |
| 2256 | |
| 2257 | struct sk_buff *tipc_sk_socks_show(void) |
| 2258 | { |
| 2259 | struct sk_buff *buf; |
| 2260 | struct tlv_desc *rep_tlv; |
| 2261 | char *pb; |
| 2262 | int pb_len; |
| 2263 | struct tipc_sock *tsk; |
| 2264 | int str_len = 0; |
| 2265 | u32 ref = 0; |
| 2266 | |
| 2267 | buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); |
| 2268 | if (!buf) |
| 2269 | return NULL; |
| 2270 | rep_tlv = (struct tlv_desc *)buf->data; |
| 2271 | pb = TLV_DATA(rep_tlv); |
| 2272 | pb_len = ULTRA_STRING_MAX_LEN; |
| 2273 | |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2274 | tsk = tipc_sk_get_next(&ref); |
| 2275 | for (; tsk; tsk = tipc_sk_get_next(&ref)) { |
| 2276 | lock_sock(&tsk->sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2277 | str_len += tipc_sk_show(tsk, pb + str_len, |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2278 | pb_len - str_len, 0); |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2279 | release_sock(&tsk->sk); |
| 2280 | tipc_sk_put(tsk); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2281 | } |
| 2282 | str_len += 1; /* for "\0" */ |
| 2283 | skb_put(buf, TLV_SPACE(str_len)); |
| 2284 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); |
| 2285 | |
| 2286 | return buf; |
| 2287 | } |
| 2288 | |
| 2289 | /* tipc_sk_reinit: set non-zero address in all existing sockets |
| 2290 | * when we go from standalone to network mode. |
| 2291 | */ |
| 2292 | void tipc_sk_reinit(void) |
| 2293 | { |
| 2294 | struct tipc_msg *msg; |
| 2295 | u32 ref = 0; |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2296 | struct tipc_sock *tsk = tipc_sk_get_next(&ref); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2297 | |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2298 | for (; tsk; tsk = tipc_sk_get_next(&ref)) { |
| 2299 | lock_sock(&tsk->sk); |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2300 | msg = &tsk->phdr; |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2301 | msg_set_prevnode(msg, tipc_own_addr); |
| 2302 | msg_set_orignode(msg, tipc_own_addr); |
Jon Paul Maloy | 6c9808c | 2014-08-22 18:09:16 -0400 | [diff] [blame] | 2303 | release_sock(&tsk->sk); |
| 2304 | tipc_sk_put(tsk); |
Jon Paul Maloy | 5a9ee0be | 2014-08-22 18:09:14 -0400 | [diff] [blame] | 2305 | } |
| 2306 | } |
| 2307 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2308 | /** |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 2309 | * struct reference - TIPC socket reference entry |
| 2310 | * @tsk: pointer to socket associated with reference entry |
| 2311 | * @ref: reference value for socket (combines instance & array index info) |
| 2312 | */ |
| 2313 | struct reference { |
| 2314 | struct tipc_sock *tsk; |
| 2315 | u32 ref; |
| 2316 | }; |
| 2317 | |
| 2318 | /** |
| 2319 | * struct tipc_ref_table - table of TIPC socket reference entries |
| 2320 | * @entries: pointer to array of reference entries |
| 2321 | * @capacity: array index of first unusable entry |
| 2322 | * @init_point: array index of first uninitialized entry |
| 2323 | * @first_free: array index of first unused socket reference entry |
| 2324 | * @last_free: array index of last unused socket reference entry |
| 2325 | * @index_mask: bitmask for array index portion of reference values |
| 2326 | * @start_mask: initial value for instance value portion of reference values |
| 2327 | */ |
| 2328 | struct ref_table { |
| 2329 | struct reference *entries; |
| 2330 | u32 capacity; |
| 2331 | u32 init_point; |
| 2332 | u32 first_free; |
| 2333 | u32 last_free; |
| 2334 | u32 index_mask; |
| 2335 | u32 start_mask; |
| 2336 | }; |
| 2337 | |
| 2338 | /* Socket reference table consists of 2**N entries. |
| 2339 | * |
| 2340 | * State Socket ptr Reference |
| 2341 | * ----- ---------- --------- |
| 2342 | * In use non-NULL XXXX|own index |
| 2343 | * (XXXX changes each time entry is acquired) |
| 2344 | * Free NULL YYYY|next free index |
| 2345 | * (YYYY is one more than last used XXXX) |
| 2346 | * Uninitialized NULL 0 |
| 2347 | * |
| 2348 | * Entry 0 is not used; this allows index 0 to denote the end of the free list. |
| 2349 | * |
| 2350 | * Note that a reference value of 0 does not necessarily indicate that an |
| 2351 | * entry is uninitialized, since the last entry in the free list could also |
| 2352 | * have a reference value of 0 (although this is unlikely). |
| 2353 | */ |
| 2354 | |
| 2355 | static struct ref_table tipc_ref_table; |
| 2356 | |
| 2357 | static DEFINE_RWLOCK(ref_table_lock); |
| 2358 | |
| 2359 | /** |
| 2360 | * tipc_ref_table_init - create reference table for sockets |
| 2361 | */ |
| 2362 | int tipc_sk_ref_table_init(u32 req_sz, u32 start) |
| 2363 | { |
| 2364 | struct reference *table; |
| 2365 | u32 actual_sz; |
| 2366 | |
| 2367 | /* account for unused entry, then round up size to a power of 2 */ |
| 2368 | |
| 2369 | req_sz++; |
| 2370 | for (actual_sz = 16; actual_sz < req_sz; actual_sz <<= 1) { |
| 2371 | /* do nothing */ |
| 2372 | }; |
| 2373 | |
| 2374 | /* allocate table & mark all entries as uninitialized */ |
| 2375 | table = vzalloc(actual_sz * sizeof(struct reference)); |
| 2376 | if (table == NULL) |
| 2377 | return -ENOMEM; |
| 2378 | |
| 2379 | tipc_ref_table.entries = table; |
| 2380 | tipc_ref_table.capacity = req_sz; |
| 2381 | tipc_ref_table.init_point = 1; |
| 2382 | tipc_ref_table.first_free = 0; |
| 2383 | tipc_ref_table.last_free = 0; |
| 2384 | tipc_ref_table.index_mask = actual_sz - 1; |
| 2385 | tipc_ref_table.start_mask = start & ~tipc_ref_table.index_mask; |
| 2386 | |
| 2387 | return 0; |
| 2388 | } |
| 2389 | |
| 2390 | /** |
| 2391 | * tipc_ref_table_stop - destroy reference table for sockets |
| 2392 | */ |
| 2393 | void tipc_sk_ref_table_stop(void) |
| 2394 | { |
| 2395 | if (!tipc_ref_table.entries) |
| 2396 | return; |
| 2397 | vfree(tipc_ref_table.entries); |
| 2398 | tipc_ref_table.entries = NULL; |
| 2399 | } |
| 2400 | |
| 2401 | /* tipc_ref_acquire - create reference to a socket |
| 2402 | * |
| 2403 | * Register an socket pointer in the reference table. |
| 2404 | * Returns a unique reference value that is used from then on to retrieve the |
| 2405 | * socket pointer, or to determine if the socket has been deregistered. |
| 2406 | */ |
| 2407 | u32 tipc_sk_ref_acquire(struct tipc_sock *tsk) |
| 2408 | { |
| 2409 | u32 index; |
| 2410 | u32 index_mask; |
| 2411 | u32 next_plus_upper; |
| 2412 | u32 ref = 0; |
| 2413 | struct reference *entry; |
| 2414 | |
| 2415 | if (unlikely(!tsk)) { |
| 2416 | pr_err("Attempt to acquire ref. to non-existent obj\n"); |
| 2417 | return 0; |
| 2418 | } |
| 2419 | if (unlikely(!tipc_ref_table.entries)) { |
| 2420 | pr_err("Ref. table not found in acquisition attempt\n"); |
| 2421 | return 0; |
| 2422 | } |
| 2423 | |
| 2424 | /* Take a free entry, if available; otherwise initialize a new one */ |
| 2425 | write_lock_bh(&ref_table_lock); |
| 2426 | index = tipc_ref_table.first_free; |
| 2427 | entry = &tipc_ref_table.entries[index]; |
| 2428 | |
| 2429 | if (likely(index)) { |
| 2430 | index = tipc_ref_table.first_free; |
| 2431 | entry = &tipc_ref_table.entries[index]; |
| 2432 | index_mask = tipc_ref_table.index_mask; |
| 2433 | next_plus_upper = entry->ref; |
| 2434 | tipc_ref_table.first_free = next_plus_upper & index_mask; |
| 2435 | ref = (next_plus_upper & ~index_mask) + index; |
| 2436 | entry->tsk = tsk; |
| 2437 | } else if (tipc_ref_table.init_point < tipc_ref_table.capacity) { |
| 2438 | index = tipc_ref_table.init_point++; |
| 2439 | entry = &tipc_ref_table.entries[index]; |
| 2440 | ref = tipc_ref_table.start_mask + index; |
| 2441 | } |
| 2442 | |
| 2443 | if (ref) { |
| 2444 | entry->ref = ref; |
| 2445 | entry->tsk = tsk; |
| 2446 | } |
| 2447 | write_unlock_bh(&ref_table_lock); |
| 2448 | return ref; |
| 2449 | } |
| 2450 | |
| 2451 | /* tipc_sk_ref_discard - invalidate reference to an socket |
| 2452 | * |
| 2453 | * Disallow future references to an socket and free up the entry for re-use. |
| 2454 | */ |
| 2455 | void tipc_sk_ref_discard(u32 ref) |
| 2456 | { |
| 2457 | struct reference *entry; |
| 2458 | u32 index; |
| 2459 | u32 index_mask; |
| 2460 | |
| 2461 | if (unlikely(!tipc_ref_table.entries)) { |
| 2462 | pr_err("Ref. table not found during discard attempt\n"); |
| 2463 | return; |
| 2464 | } |
| 2465 | |
| 2466 | index_mask = tipc_ref_table.index_mask; |
| 2467 | index = ref & index_mask; |
| 2468 | entry = &tipc_ref_table.entries[index]; |
| 2469 | |
| 2470 | write_lock_bh(&ref_table_lock); |
| 2471 | |
| 2472 | if (unlikely(!entry->tsk)) { |
| 2473 | pr_err("Attempt to discard ref. to non-existent socket\n"); |
| 2474 | goto exit; |
| 2475 | } |
| 2476 | if (unlikely(entry->ref != ref)) { |
| 2477 | pr_err("Attempt to discard non-existent reference\n"); |
| 2478 | goto exit; |
| 2479 | } |
| 2480 | |
| 2481 | /* Mark entry as unused; increment instance part of entry's |
| 2482 | * reference to invalidate any subsequent references |
| 2483 | */ |
| 2484 | |
| 2485 | entry->tsk = NULL; |
| 2486 | entry->ref = (ref & ~index_mask) + (index_mask + 1); |
| 2487 | |
| 2488 | /* Append entry to free entry list */ |
| 2489 | if (unlikely(tipc_ref_table.first_free == 0)) |
| 2490 | tipc_ref_table.first_free = index; |
| 2491 | else |
| 2492 | tipc_ref_table.entries[tipc_ref_table.last_free].ref |= index; |
| 2493 | tipc_ref_table.last_free = index; |
| 2494 | exit: |
| 2495 | write_unlock_bh(&ref_table_lock); |
| 2496 | } |
| 2497 | |
| 2498 | /* tipc_sk_get - find referenced socket and return pointer to it |
| 2499 | */ |
| 2500 | struct tipc_sock *tipc_sk_get(u32 ref) |
| 2501 | { |
| 2502 | struct reference *entry; |
| 2503 | struct tipc_sock *tsk; |
| 2504 | |
| 2505 | if (unlikely(!tipc_ref_table.entries)) |
| 2506 | return NULL; |
| 2507 | read_lock_bh(&ref_table_lock); |
| 2508 | entry = &tipc_ref_table.entries[ref & tipc_ref_table.index_mask]; |
| 2509 | tsk = entry->tsk; |
| 2510 | if (likely(tsk && (entry->ref == ref))) |
| 2511 | sock_hold(&tsk->sk); |
| 2512 | else |
| 2513 | tsk = NULL; |
| 2514 | read_unlock_bh(&ref_table_lock); |
| 2515 | return tsk; |
| 2516 | } |
| 2517 | |
| 2518 | /* tipc_sk_get_next - lock & return next socket after referenced one |
| 2519 | */ |
| 2520 | struct tipc_sock *tipc_sk_get_next(u32 *ref) |
| 2521 | { |
| 2522 | struct reference *entry; |
| 2523 | struct tipc_sock *tsk = NULL; |
| 2524 | uint index = *ref & tipc_ref_table.index_mask; |
| 2525 | |
| 2526 | read_lock_bh(&ref_table_lock); |
| 2527 | while (++index < tipc_ref_table.capacity) { |
| 2528 | entry = &tipc_ref_table.entries[index]; |
| 2529 | if (!entry->tsk) |
| 2530 | continue; |
| 2531 | tsk = entry->tsk; |
| 2532 | sock_hold(&tsk->sk); |
| 2533 | *ref = entry->ref; |
| 2534 | break; |
| 2535 | } |
| 2536 | read_unlock_bh(&ref_table_lock); |
| 2537 | return tsk; |
| 2538 | } |
| 2539 | |
| 2540 | static void tipc_sk_put(struct tipc_sock *tsk) |
| 2541 | { |
| 2542 | sock_put(&tsk->sk); |
| 2543 | } |
| 2544 | |
| 2545 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2546 | * tipc_setsockopt - set socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2547 | * @sock: socket structure |
| 2548 | * @lvl: option level |
| 2549 | * @opt: option identifier |
| 2550 | * @ov: pointer to new option value |
| 2551 | * @ol: length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2552 | * |
| 2553 | * For stream sockets only, accepts and ignores all IPPROTO_TCP options |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2554 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2555 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2556 | * Returns 0 on success, errno otherwise |
| 2557 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2558 | static int tipc_setsockopt(struct socket *sock, int lvl, int opt, |
| 2559 | char __user *ov, unsigned int ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2560 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2561 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2562 | struct tipc_sock *tsk = tipc_sk(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2563 | u32 value; |
| 2564 | int res; |
| 2565 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2566 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 2567 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2568 | if (lvl != SOL_TIPC) |
| 2569 | return -ENOPROTOOPT; |
| 2570 | if (ol < sizeof(value)) |
| 2571 | return -EINVAL; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 2572 | res = get_user(value, (u32 __user *)ov); |
| 2573 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2574 | return res; |
| 2575 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2576 | lock_sock(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2577 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2578 | switch (opt) { |
| 2579 | case TIPC_IMPORTANCE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2580 | res = tsk_set_importance(tsk, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2581 | break; |
| 2582 | case TIPC_SRC_DROPPABLE: |
| 2583 | if (sock->type != SOCK_STREAM) |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2584 | tsk_set_unreliable(tsk, value); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2585 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2586 | res = -ENOPROTOOPT; |
| 2587 | break; |
| 2588 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2589 | tsk_set_unreturnable(tsk, value); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2590 | break; |
| 2591 | case TIPC_CONN_TIMEOUT: |
Allan Stephens | a0f40f0 | 2011-05-26 13:44:34 -0400 | [diff] [blame] | 2592 | tipc_sk(sk)->conn_timeout = value; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2593 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2594 | break; |
| 2595 | default: |
| 2596 | res = -EINVAL; |
| 2597 | } |
| 2598 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2599 | release_sock(sk); |
| 2600 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2601 | return res; |
| 2602 | } |
| 2603 | |
| 2604 | /** |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2605 | * tipc_getsockopt - get socket option |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2606 | * @sock: socket structure |
| 2607 | * @lvl: option level |
| 2608 | * @opt: option identifier |
| 2609 | * @ov: receptacle for option value |
| 2610 | * @ol: receptacle for length of option value |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2611 | * |
| 2612 | * 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] | 2613 | * (to ease compatibility). |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2614 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2615 | * Returns 0 on success, errno otherwise |
| 2616 | */ |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2617 | static int tipc_getsockopt(struct socket *sock, int lvl, int opt, |
| 2618 | char __user *ov, int __user *ol) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2619 | { |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2620 | struct sock *sk = sock->sk; |
Jon Paul Maloy | 58ed944 | 2014-03-12 11:31:12 -0400 | [diff] [blame] | 2621 | struct tipc_sock *tsk = tipc_sk(sk); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2622 | int len; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2623 | u32 value; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2624 | int res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2625 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2626 | if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM)) |
| 2627 | return put_user(0, ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2628 | if (lvl != SOL_TIPC) |
| 2629 | return -ENOPROTOOPT; |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 2630 | res = get_user(len, ol); |
| 2631 | if (res) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2632 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2633 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2634 | lock_sock(sk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2635 | |
| 2636 | switch (opt) { |
| 2637 | case TIPC_IMPORTANCE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2638 | value = tsk_importance(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2639 | break; |
| 2640 | case TIPC_SRC_DROPPABLE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2641 | value = tsk_unreliable(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2642 | break; |
| 2643 | case TIPC_DEST_DROPPABLE: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2644 | value = tsk_unreturnable(tsk); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2645 | break; |
| 2646 | case TIPC_CONN_TIMEOUT: |
Jon Paul Maloy | 301bae5 | 2014-08-22 18:09:20 -0400 | [diff] [blame] | 2647 | value = tsk->conn_timeout; |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2648 | /* no need to set "res", since already 0 at this point */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2649 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2650 | case TIPC_NODE_RECVQ_DEPTH: |
Ying Xue | 9da3d47 | 2012-11-27 06:15:27 -0500 | [diff] [blame] | 2651 | value = 0; /* was tipc_queue_size, now obsolete */ |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2652 | break; |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2653 | case TIPC_SOCK_RECVQ_DEPTH: |
oscar.medina@motorola.com | 6650613 | 2009-06-30 03:25:39 +0000 | [diff] [blame] | 2654 | value = skb_queue_len(&sk->sk_receive_queue); |
| 2655 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2656 | default: |
| 2657 | res = -EINVAL; |
| 2658 | } |
| 2659 | |
Allan Stephens | 0c3141e | 2008-04-15 00:22:02 -0700 | [diff] [blame] | 2660 | release_sock(sk); |
| 2661 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2662 | if (res) |
| 2663 | return res; /* "get" failed */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2664 | |
Paul Gortmaker | 25860c3 | 2010-12-31 18:59:31 +0000 | [diff] [blame] | 2665 | if (len < sizeof(value)) |
| 2666 | return -EINVAL; |
| 2667 | |
| 2668 | if (copy_to_user(ov, &value, sizeof(value))) |
| 2669 | return -EFAULT; |
| 2670 | |
| 2671 | return put_user(sizeof(value), ol); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2672 | } |
| 2673 | |
Wei Yongjun | 52f50ce | 2014-07-20 13:14:28 +0800 | [diff] [blame] | 2674 | static int tipc_ioctl(struct socket *sk, unsigned int cmd, unsigned long arg) |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2675 | { |
| 2676 | struct tipc_sioc_ln_req lnr; |
| 2677 | void __user *argp = (void __user *)arg; |
| 2678 | |
| 2679 | switch (cmd) { |
| 2680 | case SIOCGETLINKNAME: |
| 2681 | if (copy_from_user(&lnr, argp, sizeof(lnr))) |
| 2682 | return -EFAULT; |
Ying Xue | 7b8613e | 2014-10-20 14:44:25 +0800 | [diff] [blame] | 2683 | if (!tipc_node_get_linkname(lnr.bearer_id & 0xffff, lnr.peer, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2684 | lnr.linkname, TIPC_MAX_LINK_NAME)) { |
| 2685 | if (copy_to_user(argp, &lnr, sizeof(lnr))) |
| 2686 | return -EFAULT; |
| 2687 | return 0; |
| 2688 | } |
| 2689 | return -EADDRNOTAVAIL; |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2690 | default: |
| 2691 | return -ENOIOCTLCMD; |
| 2692 | } |
| 2693 | } |
| 2694 | |
Ben Hutchings | ae86b9e | 2012-07-10 10:55:35 +0000 | [diff] [blame] | 2695 | /* Protocol switches for the various types of TIPC sockets */ |
| 2696 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2697 | static const struct proto_ops msg_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2698 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2699 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2700 | .release = tipc_release, |
| 2701 | .bind = tipc_bind, |
| 2702 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2703 | .socketpair = sock_no_socketpair, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2704 | .accept = sock_no_accept, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2705 | .getname = tipc_getname, |
| 2706 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2707 | .ioctl = tipc_ioctl, |
Ying Xue | 245f3d3 | 2011-07-06 06:01:13 -0400 | [diff] [blame] | 2708 | .listen = sock_no_listen, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2709 | .shutdown = tipc_shutdown, |
| 2710 | .setsockopt = tipc_setsockopt, |
| 2711 | .getsockopt = tipc_getsockopt, |
| 2712 | .sendmsg = tipc_sendmsg, |
| 2713 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2714 | .mmap = sock_no_mmap, |
| 2715 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2716 | }; |
| 2717 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2718 | static const struct proto_ops packet_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2719 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2720 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2721 | .release = tipc_release, |
| 2722 | .bind = tipc_bind, |
| 2723 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2724 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2725 | .accept = tipc_accept, |
| 2726 | .getname = tipc_getname, |
| 2727 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2728 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2729 | .listen = tipc_listen, |
| 2730 | .shutdown = tipc_shutdown, |
| 2731 | .setsockopt = tipc_setsockopt, |
| 2732 | .getsockopt = tipc_getsockopt, |
| 2733 | .sendmsg = tipc_send_packet, |
| 2734 | .recvmsg = tipc_recvmsg, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2735 | .mmap = sock_no_mmap, |
| 2736 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2737 | }; |
| 2738 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2739 | static const struct proto_ops stream_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2740 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2741 | .family = AF_TIPC, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2742 | .release = tipc_release, |
| 2743 | .bind = tipc_bind, |
| 2744 | .connect = tipc_connect, |
Allan Stephens | 5eee6a6 | 2007-06-10 17:24:55 -0700 | [diff] [blame] | 2745 | .socketpair = sock_no_socketpair, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2746 | .accept = tipc_accept, |
| 2747 | .getname = tipc_getname, |
| 2748 | .poll = tipc_poll, |
Erik Hugne | 78acb1f | 2014-04-24 16:26:47 +0200 | [diff] [blame] | 2749 | .ioctl = tipc_ioctl, |
Ying Xue | 247f0f3 | 2014-02-18 16:06:46 +0800 | [diff] [blame] | 2750 | .listen = tipc_listen, |
| 2751 | .shutdown = tipc_shutdown, |
| 2752 | .setsockopt = tipc_setsockopt, |
| 2753 | .getsockopt = tipc_getsockopt, |
| 2754 | .sendmsg = tipc_send_stream, |
| 2755 | .recvmsg = tipc_recv_stream, |
YOSHIFUJI Hideaki | 8238745 | 2007-07-19 10:44:56 +0900 | [diff] [blame] | 2756 | .mmap = sock_no_mmap, |
| 2757 | .sendpage = sock_no_sendpage |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2758 | }; |
| 2759 | |
Florian Westphal | bca65ea | 2008-02-07 18:18:01 -0800 | [diff] [blame] | 2760 | static const struct net_proto_family tipc_family_ops = { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 2761 | .owner = THIS_MODULE, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2762 | .family = AF_TIPC, |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2763 | .create = tipc_sk_create |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2764 | }; |
| 2765 | |
| 2766 | static struct proto tipc_proto = { |
| 2767 | .name = "TIPC", |
| 2768 | .owner = THIS_MODULE, |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 2769 | .obj_size = sizeof(struct tipc_sock), |
| 2770 | .sysctl_rmem = sysctl_tipc_rmem |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2771 | }; |
| 2772 | |
Ying Xue | c5fa7b3 | 2013-06-17 10:54:39 -0400 | [diff] [blame] | 2773 | static struct proto tipc_proto_kern = { |
| 2774 | .name = "TIPC", |
| 2775 | .obj_size = sizeof(struct tipc_sock), |
| 2776 | .sysctl_rmem = sysctl_tipc_rmem |
| 2777 | }; |
| 2778 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2779 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2780 | * tipc_socket_init - initialize TIPC socket interface |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2781 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2782 | * Returns 0 on success, errno otherwise |
| 2783 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2784 | int tipc_socket_init(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2785 | { |
| 2786 | int res; |
| 2787 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 2788 | res = proto_register(&tipc_proto, 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2789 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2790 | pr_err("Failed to register TIPC protocol type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2791 | goto out; |
| 2792 | } |
| 2793 | |
| 2794 | res = sock_register(&tipc_family_ops); |
| 2795 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 2796 | pr_err("Failed to register TIPC socket type\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2797 | proto_unregister(&tipc_proto); |
| 2798 | goto out; |
| 2799 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2800 | out: |
| 2801 | return res; |
| 2802 | } |
| 2803 | |
| 2804 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2805 | * tipc_socket_stop - stop TIPC socket interface |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2806 | */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 2807 | void tipc_socket_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2808 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 2809 | sock_unregister(tipc_family_ops.family); |
| 2810 | proto_unregister(&tipc_proto); |
| 2811 | } |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 2812 | |
| 2813 | /* Caller should hold socket lock for the passed tipc socket. */ |
| 2814 | int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk) |
| 2815 | { |
| 2816 | u32 peer_node; |
| 2817 | u32 peer_port; |
| 2818 | struct nlattr *nest; |
| 2819 | |
| 2820 | peer_node = tsk_peer_node(tsk); |
| 2821 | peer_port = tsk_peer_port(tsk); |
| 2822 | |
| 2823 | nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON); |
| 2824 | |
| 2825 | if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node)) |
| 2826 | goto msg_full; |
| 2827 | if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port)) |
| 2828 | goto msg_full; |
| 2829 | |
| 2830 | if (tsk->conn_type != 0) { |
| 2831 | if (nla_put_flag(skb, TIPC_NLA_CON_FLAG)) |
| 2832 | goto msg_full; |
| 2833 | if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type)) |
| 2834 | goto msg_full; |
| 2835 | if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance)) |
| 2836 | goto msg_full; |
| 2837 | } |
| 2838 | nla_nest_end(skb, nest); |
| 2839 | |
| 2840 | return 0; |
| 2841 | |
| 2842 | msg_full: |
| 2843 | nla_nest_cancel(skb, nest); |
| 2844 | |
| 2845 | return -EMSGSIZE; |
| 2846 | } |
| 2847 | |
| 2848 | /* Caller should hold socket lock for the passed tipc socket. */ |
| 2849 | int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb, |
| 2850 | struct tipc_sock *tsk) |
| 2851 | { |
| 2852 | int err; |
| 2853 | void *hdr; |
| 2854 | struct nlattr *attrs; |
| 2855 | |
| 2856 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
| 2857 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_SOCK_GET); |
| 2858 | if (!hdr) |
| 2859 | goto msg_cancel; |
| 2860 | |
| 2861 | attrs = nla_nest_start(skb, TIPC_NLA_SOCK); |
| 2862 | if (!attrs) |
| 2863 | goto genlmsg_cancel; |
| 2864 | if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->ref)) |
| 2865 | goto attr_msg_cancel; |
| 2866 | if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tipc_own_addr)) |
| 2867 | goto attr_msg_cancel; |
| 2868 | |
| 2869 | if (tsk->connected) { |
| 2870 | err = __tipc_nl_add_sk_con(skb, tsk); |
| 2871 | if (err) |
| 2872 | goto attr_msg_cancel; |
| 2873 | } else if (!list_empty(&tsk->publications)) { |
| 2874 | if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL)) |
| 2875 | goto attr_msg_cancel; |
| 2876 | } |
| 2877 | nla_nest_end(skb, attrs); |
| 2878 | genlmsg_end(skb, hdr); |
| 2879 | |
| 2880 | return 0; |
| 2881 | |
| 2882 | attr_msg_cancel: |
| 2883 | nla_nest_cancel(skb, attrs); |
| 2884 | genlmsg_cancel: |
| 2885 | genlmsg_cancel(skb, hdr); |
| 2886 | msg_cancel: |
| 2887 | return -EMSGSIZE; |
| 2888 | } |
| 2889 | |
| 2890 | int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 2891 | { |
| 2892 | int err; |
| 2893 | struct tipc_sock *tsk; |
| 2894 | u32 prev_ref = cb->args[0]; |
| 2895 | u32 ref = prev_ref; |
| 2896 | |
| 2897 | tsk = tipc_sk_get_next(&ref); |
| 2898 | for (; tsk; tsk = tipc_sk_get_next(&ref)) { |
| 2899 | lock_sock(&tsk->sk); |
| 2900 | err = __tipc_nl_add_sk(skb, cb, tsk); |
| 2901 | release_sock(&tsk->sk); |
| 2902 | tipc_sk_put(tsk); |
| 2903 | if (err) |
| 2904 | break; |
| 2905 | |
| 2906 | prev_ref = ref; |
| 2907 | } |
| 2908 | |
| 2909 | cb->args[0] = prev_ref; |
| 2910 | |
| 2911 | return skb->len; |
| 2912 | } |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame^] | 2913 | |
| 2914 | /* Caller should hold socket lock for the passed tipc socket. */ |
| 2915 | int __tipc_nl_add_sk_publ(struct sk_buff *skb, struct netlink_callback *cb, |
| 2916 | struct publication *publ) |
| 2917 | { |
| 2918 | void *hdr; |
| 2919 | struct nlattr *attrs; |
| 2920 | |
| 2921 | hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
| 2922 | &tipc_genl_v2_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); |
| 2923 | if (!hdr) |
| 2924 | goto msg_cancel; |
| 2925 | |
| 2926 | attrs = nla_nest_start(skb, TIPC_NLA_PUBL); |
| 2927 | if (!attrs) |
| 2928 | goto genlmsg_cancel; |
| 2929 | |
| 2930 | if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key)) |
| 2931 | goto attr_msg_cancel; |
| 2932 | if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type)) |
| 2933 | goto attr_msg_cancel; |
| 2934 | if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower)) |
| 2935 | goto attr_msg_cancel; |
| 2936 | if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper)) |
| 2937 | goto attr_msg_cancel; |
| 2938 | |
| 2939 | nla_nest_end(skb, attrs); |
| 2940 | genlmsg_end(skb, hdr); |
| 2941 | |
| 2942 | return 0; |
| 2943 | |
| 2944 | attr_msg_cancel: |
| 2945 | nla_nest_cancel(skb, attrs); |
| 2946 | genlmsg_cancel: |
| 2947 | genlmsg_cancel(skb, hdr); |
| 2948 | msg_cancel: |
| 2949 | return -EMSGSIZE; |
| 2950 | } |
| 2951 | |
| 2952 | /* Caller should hold socket lock for the passed tipc socket. */ |
| 2953 | int __tipc_nl_list_sk_publ(struct sk_buff *skb, struct netlink_callback *cb, |
| 2954 | struct tipc_sock *tsk, u32 *last_publ) |
| 2955 | { |
| 2956 | int err; |
| 2957 | struct publication *p; |
| 2958 | |
| 2959 | if (*last_publ) { |
| 2960 | list_for_each_entry(p, &tsk->publications, pport_list) { |
| 2961 | if (p->key == *last_publ) |
| 2962 | break; |
| 2963 | } |
| 2964 | if (p->key != *last_publ) { |
| 2965 | /* We never set seq or call nl_dump_check_consistent() |
| 2966 | * this means that setting prev_seq here will cause the |
| 2967 | * consistence check to fail in the netlink callback |
| 2968 | * handler. Resulting in the last NLMSG_DONE message |
| 2969 | * having the NLM_F_DUMP_INTR flag set. |
| 2970 | */ |
| 2971 | cb->prev_seq = 1; |
| 2972 | *last_publ = 0; |
| 2973 | return -EPIPE; |
| 2974 | } |
| 2975 | } else { |
| 2976 | p = list_first_entry(&tsk->publications, struct publication, |
| 2977 | pport_list); |
| 2978 | } |
| 2979 | |
| 2980 | list_for_each_entry_from(p, &tsk->publications, pport_list) { |
| 2981 | err = __tipc_nl_add_sk_publ(skb, cb, p); |
| 2982 | if (err) { |
| 2983 | *last_publ = p->key; |
| 2984 | return err; |
| 2985 | } |
| 2986 | } |
| 2987 | *last_publ = 0; |
| 2988 | |
| 2989 | return 0; |
| 2990 | } |
| 2991 | |
| 2992 | int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 2993 | { |
| 2994 | int err; |
| 2995 | u32 tsk_ref = cb->args[0]; |
| 2996 | u32 last_publ = cb->args[1]; |
| 2997 | u32 done = cb->args[2]; |
| 2998 | struct tipc_sock *tsk; |
| 2999 | |
| 3000 | if (!tsk_ref) { |
| 3001 | struct nlattr **attrs; |
| 3002 | struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; |
| 3003 | |
| 3004 | err = tipc_nlmsg_parse(cb->nlh, &attrs); |
| 3005 | if (err) |
| 3006 | return err; |
| 3007 | |
| 3008 | err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, |
| 3009 | attrs[TIPC_NLA_SOCK], |
| 3010 | tipc_nl_sock_policy); |
| 3011 | if (err) |
| 3012 | return err; |
| 3013 | |
| 3014 | if (!sock[TIPC_NLA_SOCK_REF]) |
| 3015 | return -EINVAL; |
| 3016 | |
| 3017 | tsk_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); |
| 3018 | } |
| 3019 | |
| 3020 | if (done) |
| 3021 | return 0; |
| 3022 | |
| 3023 | tsk = tipc_sk_get(tsk_ref); |
| 3024 | if (!tsk) |
| 3025 | return -EINVAL; |
| 3026 | |
| 3027 | lock_sock(&tsk->sk); |
| 3028 | err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ); |
| 3029 | if (!err) |
| 3030 | done = 1; |
| 3031 | release_sock(&tsk->sk); |
| 3032 | tipc_sk_put(tsk); |
| 3033 | |
| 3034 | cb->args[0] = tsk_ref; |
| 3035 | cb->args[1] = last_publ; |
| 3036 | cb->args[2] = done; |
| 3037 | |
| 3038 | return skb->len; |
| 3039 | } |