^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * net/tipc/socket.c: TIPC socket API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2001-2007, 2012-2017, Ericsson AB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2004-2008, 2010-2013, Wind River Systems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * modification, are permitted provided that the following conditions are met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * 1. Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * notice, this list of conditions and the following disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * 2. Redistributions in binary form must reproduce the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * notice, this list of conditions and the following disclaimer in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * documentation and/or other materials provided with the distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * 3. Neither the names of the copyright holders nor the names of its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * contributors may be used to endorse or promote products derived from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * this software without specific prior written permission.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Alternatively, this software may be distributed under the terms of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * GNU General Public License ("GPL") version 2 as published by the Free
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * POSSIBILITY OF SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/rhashtable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include "core.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include "name_table.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include "node.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include "link.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include "name_distr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include "socket.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include "bcast.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include "netlink.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include "group.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include "trace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define NAGLE_START_INIT 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define NAGLE_START_MAX 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define TIPC_MAX_PORT 0xffffffff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define TIPC_MIN_PORT 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define TIPC_ACK_RATE 4 /* ACK at 1/4 of rcv window size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) TIPC_LISTEN = TCP_LISTEN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) TIPC_ESTABLISHED = TCP_ESTABLISHED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) TIPC_OPEN = TCP_CLOSE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) TIPC_DISCONNECTING = TCP_CLOSE_WAIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) TIPC_CONNECTING = TCP_SYN_SENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct sockaddr_pair {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct sockaddr_tipc sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct sockaddr_tipc member;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * struct tipc_sock - TIPC socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * @sk: socket - interacts with 'port' and with user via the socket API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * @conn_type: TIPC type used when connection was established
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * @conn_instance: TIPC instance used when connection was established
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * @published: non-zero if port has one or more associated names
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * @max_pkt: maximum packet size "hint" used when building messages sent by port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * @maxnagle: maximum size of msg which can be subject to nagle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * @portid: unique port identity in TIPC socket hash table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * @phdr: preformatted message header used when sending messages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * #cong_links: list of congested links
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * @publications: list of publications for port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * @blocking_link: address of the congested link we are currently sleeping on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * @pub_count: total # of publications port has made during its lifetime
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * @conn_timeout: the time we can wait for an unresponded setup request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * @cong_link_cnt: number of congested links
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * @snt_unacked: # messages sent by socket, and not yet acked by peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * @rcv_unacked: # messages read by user, but not yet acked back to peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * @peer: 'connected' peer for dgram/rdm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * @node: hash table node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * @mc_method: cookie for use between socket and broadcast layer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * @rcu: rcu struct for tipc_sock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct tipc_sock {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct sock sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) u32 conn_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) u32 conn_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int published;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) u32 max_pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) u32 maxnagle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) u32 portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct tipc_msg phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct list_head cong_links;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct list_head publications;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) u32 pub_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) atomic_t dupl_rcvcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) u16 conn_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) bool probe_unacked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) u16 cong_link_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) u16 snt_unacked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) u16 snd_win;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) u16 peer_caps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) u16 rcv_unacked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) u16 rcv_win;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct sockaddr_tipc peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct rhash_head node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct tipc_mc_method mc_method;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct rcu_head rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct tipc_group *group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) u32 oneway;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) u32 nagle_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) u16 snd_backlog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) u16 msg_acc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) u16 pkt_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) bool expect_ack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) bool nodelay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) bool group_is_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static void tipc_data_ready(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static void tipc_write_space(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static void tipc_sock_destruct(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static int tipc_release(struct socket *sock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) bool kern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static void tipc_sk_timeout(struct timer_list *t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct tipc_name_seq const *seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct tipc_name_seq const *seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static int tipc_sk_leave(struct tipc_sock *tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static int tipc_sk_insert(struct tipc_sock *tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static void tipc_sk_remove(struct tipc_sock *tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static int tipc_wait_for_connect(struct socket *sock, long *timeo_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static const struct proto_ops packet_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static const struct proto_ops stream_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static const struct proto_ops msg_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static struct proto tipc_proto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static const struct rhashtable_params tsk_rht_params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static u32 tsk_own_node(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return msg_prevnode(&tsk->phdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static u32 tsk_peer_node(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return msg_destnode(&tsk->phdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static u32 tsk_peer_port(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return msg_destport(&tsk->phdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static bool tsk_unreliable(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) return msg_src_droppable(&tsk->phdr) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static bool tsk_unreturnable(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return msg_dest_droppable(&tsk->phdr) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static int tsk_importance(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return msg_importance(&tsk->phdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static struct tipc_sock *tipc_sk(const struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return container_of(sk, struct tipc_sock, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int tsk_set_importance(struct sock *sk, int imp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (imp > TIPC_CRITICAL_IMPORTANCE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) msg_set_importance(&tipc_sk(sk)->phdr, (u32)imp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static bool tsk_conn_cong(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return tsk->snt_unacked > tsk->snd_win;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) static u16 tsk_blocks(int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) return ((len / FLOWCTL_BLK_SZ) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /* tsk_blocks(): translate a buffer size in bytes to number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * advertisable blocks, taking into account the ratio truesize(len)/len
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) static u16 tsk_adv_blocks(int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) return len / FLOWCTL_BLK_SZ / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* tsk_inc(): increment counter for sent or received data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * - If block based flow control is not supported by peer we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * fall back to message based ditto, incrementing the counter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) static u16 tsk_inc(struct tipc_sock *tsk, int msglen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) return ((msglen / FLOWCTL_BLK_SZ) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /* tsk_set_nagle - enable/disable nagle property by manipulating maxnagle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static void tsk_set_nagle(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) tsk->maxnagle = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (sk->sk_type != SOCK_STREAM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (tsk->nodelay)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (!(tsk->peer_caps & TIPC_NAGLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /* Limit node local buffer size to avoid receive queue overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (tsk->max_pkt == MAX_MSG_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) tsk->maxnagle = 1500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) tsk->maxnagle = tsk->max_pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * tsk_advance_rx_queue - discard first buffer in socket receive queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * Caller must hold socket lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static void tsk_advance_rx_queue(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) trace_tipc_sk_advance_rx(sk, NULL, TIPC_DUMP_SK_RCVQ, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) kfree_skb(__skb_dequeue(&sk->sk_receive_queue));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) /* tipc_sk_respond() : send response message back to sender
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) u32 selector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) u32 dnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) u32 onode = tipc_own_addr(sock_net(sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (!tipc_msg_reverse(onode, &skb, err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_NONE, "@sk_respond!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) dnode = msg_destnode(buf_msg(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) selector = msg_origport(buf_msg(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) * tsk_rej_rx_queue - reject all buffers in socket receive queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * Caller must hold socket lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static void tsk_rej_rx_queue(struct sock *sk, int error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) while ((skb = __skb_dequeue(&sk->sk_receive_queue)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) tipc_sk_respond(sk, skb, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static bool tipc_sk_connected(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return sk->sk_state == TIPC_ESTABLISHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* tipc_sk_type_connectionless - check if the socket is datagram socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * @sk: socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * Returns true if connection less, false otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) static bool tipc_sk_type_connectionless(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* tsk_peer_msg - verify if message was sent by connected port's peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * Handles cases where the node's network address has changed from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * the default of <0.0.0> to its configured setting.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) u32 self = tipc_own_addr(sock_net(sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) u32 peer_port = tsk_peer_port(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) u32 orig_node, peer_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) if (unlikely(!tipc_sk_connected(sk)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (unlikely(msg_origport(msg) != peer_port))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) orig_node = msg_orignode(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) peer_node = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (likely(orig_node == peer_node))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (!orig_node && peer_node == self)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (!peer_node && orig_node == self)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) /* tipc_set_sk_state - set the sk_state of the socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * @sk: socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) * Caller must hold socket lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) static int tipc_set_sk_state(struct sock *sk, int state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) int oldsk_state = sk->sk_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) int res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) switch (state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) case TIPC_OPEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) case TIPC_LISTEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) case TIPC_CONNECTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (oldsk_state == TIPC_OPEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) case TIPC_ESTABLISHED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (oldsk_state == TIPC_CONNECTING ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) oldsk_state == TIPC_OPEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) case TIPC_DISCONNECTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (oldsk_state == TIPC_CONNECTING ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) oldsk_state == TIPC_ESTABLISHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (!res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) sk->sk_state = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static int tipc_sk_sock_err(struct socket *sock, long *timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int err = sock_error(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) int typ = sock->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (sk->sk_state == TIPC_DISCONNECTING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return -EPIPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) else if (!tipc_sk_connected(sk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (!*timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (signal_pending(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return sock_intr_errno(*timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) #define tipc_wait_for_cond(sock_, timeo_, condition_) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) ({ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) DEFINE_WAIT_FUNC(wait_, woken_wake_function); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) struct sock *sk_; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) int rc_; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) while ((rc_ = !(condition_))) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) /* coupled with smp_wmb() in tipc_sk_proto_rcv() */ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) smp_rmb(); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) sk_ = (sock_)->sk; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) rc_ = tipc_sk_sock_err((sock_), timeo_); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (rc_) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) break; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) add_wait_queue(sk_sleep(sk_), &wait_); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) release_sock(sk_); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) sched_annotate_sleep(); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) lock_sock(sk_); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) remove_wait_queue(sk_sleep(sk_), &wait_); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) rc_; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) * tipc_sk_create - create a TIPC socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) * @net: network namespace (must be default network)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) * @sock: pre-allocated socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) * @protocol: protocol indicator (must be 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) * @kern: caused by kernel or by userspace?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) * This routine creates additional data structures used by the TIPC socket,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) * initializes them, and links them together.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) static int tipc_sk_create(struct net *net, struct socket *sock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) int protocol, int kern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) const struct proto_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) struct tipc_sock *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct tipc_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) /* Validate arguments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (unlikely(protocol != 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) return -EPROTONOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) switch (sock->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) case SOCK_STREAM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) ops = &stream_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) case SOCK_SEQPACKET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) ops = &packet_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) case SOCK_DGRAM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) case SOCK_RDM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) ops = &msg_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return -EPROTOTYPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) /* Allocate socket's protocol area */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (sk == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) tsk->max_pkt = MAX_PKT_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) tsk->maxnagle = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) tsk->nagle_start = NAGLE_START_INIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) INIT_LIST_HEAD(&tsk->publications);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) INIT_LIST_HEAD(&tsk->cong_links);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) msg = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) /* Finish initializing socket data structures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) sock->ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) sock_init_data(sock, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) tipc_set_sk_state(sk, TIPC_OPEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (tipc_sk_insert(tsk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) pr_warn("Socket create failed; port number exhausted\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) /* Ensure tsk is visible before we read own_addr. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) smp_mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) tipc_msg_init(tipc_own_addr(net), msg, TIPC_LOW_IMPORTANCE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) TIPC_NAMED_MSG, NAMED_H_SIZE, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) msg_set_origport(msg, tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) timer_setup(&sk->sk_timer, tipc_sk_timeout, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) sk->sk_shutdown = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) sk->sk_backlog_rcv = tipc_sk_backlog_rcv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) sk->sk_rcvbuf = sysctl_tipc_rmem[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) sk->sk_data_ready = tipc_data_ready;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) sk->sk_write_space = tipc_write_space;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) sk->sk_destruct = tipc_sock_destruct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) tsk->conn_timeout = CONN_TIMEOUT_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) tsk->group_is_open = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) atomic_set(&tsk->dupl_rcvcnt, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) /* Start out with safe limits until we receive an advertised window */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) tsk->rcv_win = tsk->snd_win;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (tipc_sk_type_connectionless(sk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) tsk_set_unreturnable(tsk, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) if (sock->type == SOCK_DGRAM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) tsk_set_unreliable(tsk, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) __skb_queue_head_init(&tsk->mc_method.deferredq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) trace_tipc_sk_create(sk, NULL, TIPC_DUMP_NONE, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) static void tipc_sk_callback(struct rcu_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) sock_put(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) /* Caller should hold socket lock for the socket. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) static void __tipc_shutdown(struct socket *sock, int error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) long timeout = msecs_to_jiffies(CONN_TIMEOUT_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) u32 dnode = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) !tsk_conn_cong(tsk)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) /* Push out delayed messages if in Nagle mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) tipc_sk_push_backlog(tsk, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) /* Remove pending SYN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) __skb_queue_purge(&sk->sk_write_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) /* Remove partially received buffer if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) skb = skb_peek(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) if (skb && TIPC_SKB_CB(skb)->bytes_read) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) __skb_unlink(skb, &sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* Reject all unreceived messages if connectionless */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) if (tipc_sk_type_connectionless(sk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) tsk_rej_rx_queue(sk, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) switch (sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) case TIPC_CONNECTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) case TIPC_ESTABLISHED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) tipc_set_sk_state(sk, TIPC_DISCONNECTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) tipc_node_remove_conn(net, dnode, tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) /* Send a FIN+/- to its peer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) skb = __skb_dequeue(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) __skb_queue_purge(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) tipc_sk_respond(sk, skb, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) tsk_own_node(tsk), tsk_peer_port(tsk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) tsk->portid, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) if (skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) tipc_node_xmit_skb(net, skb, dnode, tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) case TIPC_LISTEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) /* Reject all SYN messages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) tsk_rej_rx_queue(sk, error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) __skb_queue_purge(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) * tipc_release - destroy a TIPC socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) * @sock: socket to destroy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) * This routine cleans up any messages that are still queued on the socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) * For DGRAM and RDM socket types, all queued messages are rejected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) * For SEQPACKET and STREAM socket types, the first message is rejected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) * and any others are discarded. (If the first message on a STREAM socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) * is partially-read, it is discarded and the next one is rejected instead.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) * NOTE: Rejected messages are not necessarily returned to the sender! They
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) * are returned or discarded according to the "destination droppable" setting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) * specified for the message by the sender.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) static int tipc_release(struct socket *sock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) struct tipc_sock *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) * Exit if socket isn't fully initialized (occurs when a failed accept()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * releases a pre-allocated child socket that was never used)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) if (sk == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) trace_tipc_sk_release(sk, NULL, TIPC_DUMP_ALL, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) __tipc_shutdown(sock, TIPC_ERR_NO_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) sk->sk_shutdown = SHUTDOWN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) tipc_sk_leave(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) tipc_sk_withdraw(tsk, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) __skb_queue_purge(&tsk->mc_method.deferredq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) sk_stop_timer(sk, &sk->sk_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) tipc_sk_remove(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) sock_orphan(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) /* Reject any messages that accumulated in backlog queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) tipc_dest_list_purge(&tsk->cong_links);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) tsk->cong_link_cnt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) call_rcu(&tsk->rcu, tipc_sk_callback);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) sock->sk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * tipc_bind - associate or disassocate TIPC name(s) with a socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) * @uaddr: socket address describing name(s) and desired operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) * @uaddr_len: size of socket address data structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) * Name and name sequence binding is indicated using a positive scope value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) * a negative scope value unbinds the specified name. Specifying no name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) * (i.e. a socket address length of 0) unbinds all names from the socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) * NOTE: This routine doesn't need to take the socket lock since it doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) * access any non-constant socket information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) static int tipc_bind(struct socket *sock, struct sockaddr *uaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) int uaddr_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) int res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (unlikely(!uaddr_len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) res = tipc_sk_withdraw(tsk, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) if (tsk->group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) res = -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (uaddr_len < sizeof(struct sockaddr_tipc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) if (addr->family != AF_TIPC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) res = -EAFNOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) if (addr->addrtype == TIPC_ADDR_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) addr->addr.nameseq.upper = addr->addr.nameseq.lower;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) else if (addr->addrtype != TIPC_ADDR_NAMESEQ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) res = -EAFNOSUPPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) (addr->addr.nameseq.type != TIPC_TOP_SRV) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) (addr->addr.nameseq.type != TIPC_CFG_SRV)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) res = -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) res = (addr->scope >= 0) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) * tipc_getname - get port ID of socket or peer socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) * @uaddr: area for returned socket address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) * NOTE: This routine doesn't need to take the socket lock since it only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) * accesses socket information that is unchanging (or which changes in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) * a completely predictable manner).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) static int tipc_getname(struct socket *sock, struct sockaddr *uaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) int peer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) memset(addr, 0, sizeof(*addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) if (peer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) if ((!tipc_sk_connected(sk)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) return -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) addr->addr.id.ref = tsk_peer_port(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) addr->addr.id.node = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) addr->addr.id.ref = tsk->portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) addr->addr.id.node = tipc_own_addr(sock_net(sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) addr->addrtype = TIPC_ADDR_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) addr->family = AF_TIPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) addr->scope = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) addr->addr.name.domain = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) return sizeof(*addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) * tipc_poll - read and possibly block on pollmask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) * @file: file structure associated with the socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) * @sock: socket for which to calculate the poll bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) * @wait: ???
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) * Returns pollmask value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) * COMMENTARY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) * It appears that the usual socket locking mechanisms are not useful here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) * since the pollmask info is potentially out-of-date the moment this routine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) * exits. TCP and other protocols seem to rely on higher level poll routines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) * to handle any preventable race conditions, so TIPC will do the same ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) * IMPORTANT: The fact that a read or write operation is indicated does NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) * imply that the operation will succeed, merely that it should be performed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) * and will not block.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) static __poll_t tipc_poll(struct file *file, struct socket *sock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) __poll_t revents = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) sock_poll_wait(file, sock, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) trace_tipc_sk_poll(sk, NULL, TIPC_DUMP_ALL, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) if (sk->sk_shutdown & RCV_SHUTDOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) revents |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) if (sk->sk_shutdown == SHUTDOWN_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) revents |= EPOLLHUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) switch (sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) case TIPC_ESTABLISHED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) revents |= EPOLLOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) case TIPC_LISTEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) case TIPC_CONNECTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) revents |= EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) case TIPC_OPEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) if (tsk->group_is_open && !tsk->cong_link_cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) revents |= EPOLLOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) if (!tipc_sk_type_connectionless(sk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) if (skb_queue_empty_lockless(&sk->sk_receive_queue))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) revents |= EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) case TIPC_DISCONNECTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) revents = EPOLLIN | EPOLLRDNORM | EPOLLHUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) return revents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) * tipc_sendmcast - send multicast message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) * @seq: destination address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) * @msg: message to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) * @dlen: length of data to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) * @timeout: timeout to wait for wakeup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) * Called from function tipc_sendmsg(), which has done all sanity checks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) * Returns the number of bytes sent on success, or errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) struct msghdr *msg, size_t dlen, long timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) struct tipc_msg *hdr = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) int mtu = tipc_bcast_get_mtu(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) struct tipc_mc_method *method = &tsk->mc_method;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) struct sk_buff_head pkts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) struct tipc_nlist dsts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) if (tsk->group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) /* Block or return if any destination link is congested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) /* Lookup destination nodes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) tipc_nlist_init(&dsts, tipc_own_addr(net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) seq->upper, &dsts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) if (!dsts.local && !dsts.remote)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) return -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) /* Build message header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) msg_set_type(hdr, TIPC_MCAST_MSG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) msg_set_hdr_sz(hdr, MCAST_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) msg_set_destport(hdr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) msg_set_destnode(hdr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) msg_set_nametype(hdr, seq->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) msg_set_namelower(hdr, seq->lower);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) msg_set_nameupper(hdr, seq->upper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) /* Build message as chain of buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) __skb_queue_head_init(&pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) /* Send message if build was successful */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) if (unlikely(rc == dlen)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) trace_tipc_sk_sendmcast(sk, skb_peek(&pkts),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) TIPC_DUMP_SK_SNDQ, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) rc = tipc_mcast_xmit(net, &pkts, method, &dsts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) &tsk->cong_link_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) tipc_nlist_purge(&dsts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) return rc ? rc : dlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) * tipc_send_group_msg - send a message to a member in the group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) * @net: network namespace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) * @m: message to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) * @mb: group member
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) * @dnode: destination node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) * @dport: destination port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) * @dlen: total length of message data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) struct msghdr *m, struct tipc_member *mb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) u32 dnode, u32 dport, int dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) u16 bc_snd_nxt = tipc_group_bc_snd_nxt(tsk->group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) struct tipc_mc_method *method = &tsk->mc_method;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) int blks = tsk_blocks(GROUP_H_SIZE + dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) struct tipc_msg *hdr = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) struct sk_buff_head pkts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) int mtu, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) /* Complete message header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) msg_set_type(hdr, TIPC_GRP_UCAST_MSG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) msg_set_hdr_sz(hdr, GROUP_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) msg_set_destport(hdr, dport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) msg_set_destnode(hdr, dnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) msg_set_grp_bc_seqno(hdr, bc_snd_nxt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) /* Build message as chain of buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) __skb_queue_head_init(&pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) mtu = tipc_node_get_mtu(net, dnode, tsk->portid, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) if (unlikely(rc != dlen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) /* Send message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) if (unlikely(rc == -ELINKCONG)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) tipc_dest_push(&tsk->cong_links, dnode, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) tsk->cong_link_cnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) /* Update send window */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) tipc_group_update_member(mb, blks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) /* A broadcast sent within next EXPIRE period must follow same path */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) method->rcast = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) method->mandatory = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) return dlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) * tipc_send_group_unicast - send message to a member in the group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) * @m: message to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) * @dlen: total length of message data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) * @timeout: timeout to wait for wakeup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) * Called from function tipc_sendmsg(), which has done all sanity checks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) * Returns the number of bytes sent on success, or errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) int dlen, long timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) int blks = tsk_blocks(GROUP_H_SIZE + dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) struct tipc_member *mb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) u32 node, port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) node = dest->addr.id.node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) port = dest->addr.id.ref;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) if (!port && !node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) return -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) /* Block or return if destination link or member is congested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) rc = tipc_wait_for_cond(sock, &timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) !tipc_dest_find(&tsk->cong_links, node, 0) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) tsk->group &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) !tipc_group_cong(tsk->group, node, port, blks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) &mb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) if (unlikely(!mb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) return -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) rc = tipc_send_group_msg(net, tsk, m, mb, node, port, dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) return rc ? rc : dlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) * tipc_send_group_anycast - send message to any member with given identity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) * @m: message to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) * @dlen: total length of message data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) * @timeout: timeout to wait for wakeup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) * Called from function tipc_sendmsg(), which has done all sanity checks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) * Returns the number of bytes sent on success, or errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) int dlen, long timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) struct list_head *cong_links = &tsk->cong_links;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) int blks = tsk_blocks(GROUP_H_SIZE + dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) struct tipc_msg *hdr = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) struct tipc_member *first = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) struct tipc_member *mbr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) u32 node, port, exclude;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) struct list_head dsts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) u32 type, inst, scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) int lookups = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) int dstcnt, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) bool cong;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) INIT_LIST_HEAD(&dsts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) type = msg_nametype(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) inst = dest->addr.name.name.instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) scope = msg_lookup_scope(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) while (++lookups < 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) exclude = tipc_group_exclude(tsk->group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) first = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) /* Look for a non-congested destination member, if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) &dstcnt, exclude, false))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) return -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) tipc_dest_pop(&dsts, &node, &port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) cong = tipc_group_cong(tsk->group, node, port, blks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) &mbr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) if (!cong)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) if (mbr == first)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) if (!first)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) first = mbr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) /* Start over if destination was not in member list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) if (unlikely(!mbr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) if (likely(!cong && !tipc_dest_find(cong_links, node, 0)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) /* Block or return if destination link or member is congested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) rc = tipc_wait_for_cond(sock, &timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) !tipc_dest_find(cong_links, node, 0) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) tsk->group &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) !tipc_group_cong(tsk->group, node, port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) blks, &mbr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) /* Send, unless destination disappeared while waiting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) if (likely(mbr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) if (unlikely(lookups >= 4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) return -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) rc = tipc_send_group_msg(net, tsk, m, mbr, node, port, dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) return rc ? rc : dlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) * tipc_send_group_bcast - send message to all members in communication group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) * @m: message to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) * @dlen: total length of message data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) * @timeout: timeout to wait for wakeup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) * Called from function tipc_sendmsg(), which has done all sanity checks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) * Returns the number of bytes sent on success, or errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) int dlen, long timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) struct tipc_nlist *dsts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) struct tipc_mc_method *method = &tsk->mc_method;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) bool ack = method->mandatory && method->rcast;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) int blks = tsk_blocks(MCAST_H_SIZE + dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) struct tipc_msg *hdr = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) int mtu = tipc_bcast_get_mtu(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) struct sk_buff_head pkts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) int rc = -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) /* Block or return if any destination link or member is congested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) rc = tipc_wait_for_cond(sock, &timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) !tsk->cong_link_cnt && tsk->group &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) !tipc_group_bc_cong(tsk->group, blks));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) dsts = tipc_group_dests(tsk->group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) if (!dsts->local && !dsts->remote)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) return -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) /* Complete message header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) if (dest) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) msg_set_type(hdr, TIPC_GRP_MCAST_MSG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) msg_set_nameinst(hdr, dest->addr.name.name.instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) msg_set_type(hdr, TIPC_GRP_BCAST_MSG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) msg_set_nameinst(hdr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) msg_set_hdr_sz(hdr, GROUP_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) msg_set_destport(hdr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) msg_set_destnode(hdr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) msg_set_grp_bc_seqno(hdr, tipc_group_bc_snd_nxt(tsk->group));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) /* Avoid getting stuck with repeated forced replicasts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) msg_set_grp_bc_ack_req(hdr, ack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) /* Build message as chain of buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) __skb_queue_head_init(&pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) if (unlikely(rc != dlen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) /* Send message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) rc = tipc_mcast_xmit(net, &pkts, method, dsts, &tsk->cong_link_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) /* Update broadcast sequence number and send windows */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) tipc_group_update_bc_members(tsk->group, blks, ack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) /* Broadcast link is now free to choose method for next broadcast */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) method->mandatory = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) method->expires = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) return dlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) * tipc_send_group_mcast - send message to all members with given identity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) * @m: message to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) * @dlen: total length of message data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) * @timeout: timeout to wait for wakeup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) * Called from function tipc_sendmsg(), which has done all sanity checks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) * Returns the number of bytes sent on success, or errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) int dlen, long timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) struct tipc_group *grp = tsk->group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) struct tipc_msg *hdr = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) u32 type, inst, scope, exclude;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) struct list_head dsts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) u32 dstcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) INIT_LIST_HEAD(&dsts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) type = msg_nametype(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) inst = dest->addr.name.name.instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) scope = msg_lookup_scope(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) exclude = tipc_group_exclude(grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) &dstcnt, exclude, true))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) return -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) if (dstcnt == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) tipc_dest_pop(&dsts, &dest->addr.id.node, &dest->addr.id.ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) return tipc_send_group_unicast(sock, m, dlen, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) tipc_dest_list_purge(&dsts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) return tipc_send_group_bcast(sock, m, dlen, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) * @arrvq: queue with arriving messages, to be cloned after destination lookup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) * @inputq: queue with cloned messages, delivered to socket after dest lookup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) * Multi-threaded: parallel calls with reference to same queues may occur
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) struct sk_buff_head *inputq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) u32 self = tipc_own_addr(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) u32 type, lower, upper, scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) struct sk_buff *skb, *_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) u32 portid, onode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) struct sk_buff_head tmpq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) struct list_head dports;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) struct tipc_msg *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) int user, mtyp, hlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) bool exact;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) __skb_queue_head_init(&tmpq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) INIT_LIST_HEAD(&dports);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) skb = tipc_skb_peek(arrvq, &inputq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) user = msg_user(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) mtyp = msg_type(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) hlen = skb_headroom(skb) + msg_hdr_sz(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) onode = msg_orignode(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) type = msg_nametype(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) spin_lock_bh(&inputq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) if (skb_peek(arrvq) == skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) __skb_dequeue(arrvq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) __skb_queue_tail(inputq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) spin_unlock_bh(&inputq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) /* Group messages require exact scope match */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) if (msg_in_group(hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) lower = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) upper = ~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) scope = msg_lookup_scope(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) exact = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) /* TIPC_NODE_SCOPE means "any scope" in this context */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) if (onode == self)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) scope = TIPC_NODE_SCOPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) scope = TIPC_CLUSTER_SCOPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) exact = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) lower = msg_namelower(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) upper = msg_nameupper(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) /* Create destination port list: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) tipc_nametbl_mc_lookup(net, type, lower, upper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) scope, exact, &dports);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) /* Clone message per destination */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) while (tipc_dest_pop(&dports, NULL, &portid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) _skb = __pskb_copy(skb, hlen, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) if (_skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) msg_set_destport(buf_msg(_skb), portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) __skb_queue_tail(&tmpq, _skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) pr_warn("Failed to clone mcast rcv buffer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) /* Append to inputq if not already done by other thread */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) spin_lock_bh(&inputq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) if (skb_peek(arrvq) == skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) skb_queue_splice_tail_init(&tmpq, inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) /* Decrease the skb's refcnt as increasing in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) * function tipc_skb_peek
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) kfree_skb(__skb_dequeue(arrvq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) spin_unlock_bh(&inputq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) __skb_queue_purge(&tmpq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) tipc_sk_rcv(net, inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) /* tipc_sk_push_backlog(): send accumulated buffers in socket write queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) * when socket is in Nagle mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) static void tipc_sk_push_backlog(struct tipc_sock *tsk, bool nagle_ack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) struct sk_buff_head *txq = &tsk->sk.sk_write_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) struct sk_buff *skb = skb_peek_tail(txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) struct net *net = sock_net(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) u32 dnode = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) if (nagle_ack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) tsk->pkt_cnt += skb_queue_len(txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) if (!tsk->pkt_cnt || tsk->msg_acc / tsk->pkt_cnt < 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) tsk->oneway = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) if (tsk->nagle_start < NAGLE_START_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) tsk->nagle_start *= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) tsk->expect_ack = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) pr_debug("tsk %10u: bad nagle %u -> %u, next start %u!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) tsk->portid, tsk->msg_acc, tsk->pkt_cnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) tsk->nagle_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) tsk->nagle_start = NAGLE_START_INIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) if (skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) msg_set_ack_required(buf_msg(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) tsk->expect_ack = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) tsk->expect_ack = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) tsk->msg_acc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) tsk->pkt_cnt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) if (!skb || tsk->cong_link_cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) /* Do not send SYN again after congestion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) if (msg_is_syn(buf_msg(skb)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) if (tsk->msg_acc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) tsk->pkt_cnt += skb_queue_len(txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) tsk->snt_unacked += tsk->snd_backlog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) tsk->snd_backlog = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) rc = tipc_node_xmit(net, txq, dnode, tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) if (rc == -ELINKCONG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) tsk->cong_link_cnt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) * tipc_sk_conn_proto_rcv - receive a connection mng protocol message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) * @tsk: receiving socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) * @skb: pointer to message buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) struct sk_buff_head *inputq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) struct sk_buff_head *xmitq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) struct tipc_msg *hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) u32 onode = tsk_own_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) int mtyp = msg_type(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) bool was_cong;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) /* Ignore if connection cannot be validated: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) if (!tsk_peer_msg(tsk, hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) trace_tipc_sk_drop_msg(sk, skb, TIPC_DUMP_NONE, "@proto_rcv!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) if (unlikely(msg_errcode(hdr))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) tipc_set_sk_state(sk, TIPC_DISCONNECTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) tsk_peer_port(tsk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) /* State change is ignored if socket already awake,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) * - convert msg to abort msg and add to inqueue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) msg_set_user(hdr, TIPC_CRITICAL_IMPORTANCE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) msg_set_type(hdr, TIPC_CONN_MSG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) msg_set_size(hdr, BASIC_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) msg_set_hdr_sz(hdr, BASIC_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) __skb_queue_tail(inputq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) tsk->probe_unacked = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) if (mtyp == CONN_PROBE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) msg_set_type(hdr, CONN_PROBE_REPLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) if (tipc_msg_reverse(onode, &skb, TIPC_OK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) __skb_queue_tail(xmitq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) } else if (mtyp == CONN_ACK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) was_cong = tsk_conn_cong(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) tipc_sk_push_backlog(tsk, msg_nagle_ack(hdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) tsk->snt_unacked -= msg_conn_ack(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) tsk->snd_win = msg_adv_win(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) if (was_cong && !tsk_conn_cong(tsk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) sk->sk_write_space(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) } else if (mtyp != CONN_PROBE_REPLY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) pr_warn("Received unknown CONN_PROTO msg\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) * tipc_sendmsg - send message in connectionless manner
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) * @m: message to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) * @dsz: amount of user data to be sent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) * Message must have an destination specified explicitly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) * Used for SOCK_RDM and SOCK_DGRAM messages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) * (Note: 'SYN+' is prohibited on SOCK_STREAM.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) * Returns the number of bytes sent on success, or errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) static int tipc_sendmsg(struct socket *sock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) struct msghdr *m, size_t dsz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) ret = __tipc_sendmsg(sock, m, dsz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) struct list_head *clinks = &tsk->cong_links;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) bool syn = !tipc_sk_type_connectionless(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) struct tipc_group *grp = tsk->group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) struct tipc_msg *hdr = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) struct tipc_name_seq *seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) struct sk_buff_head pkts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) u32 dport = 0, dnode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) u32 type = 0, inst = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) int mtu, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) if (likely(dest)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) if (unlikely(m->msg_namelen < sizeof(*dest)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) if (unlikely(dest->family != AF_TIPC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) if (grp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) if (!dest)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) return tipc_send_group_bcast(sock, m, dlen, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) if (dest->addrtype == TIPC_ADDR_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) return tipc_send_group_anycast(sock, m, dlen, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) if (dest->addrtype == TIPC_ADDR_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) return tipc_send_group_unicast(sock, m, dlen, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) if (dest->addrtype == TIPC_ADDR_MCAST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) return tipc_send_group_mcast(sock, m, dlen, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) if (unlikely(!dest)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) dest = &tsk->peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) if (!syn && dest->family != AF_TIPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) return -EDESTADDRREQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) if (unlikely(syn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) if (sk->sk_state == TIPC_LISTEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) return -EPIPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) if (sk->sk_state != TIPC_OPEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) return -EISCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) if (tsk->published)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) if (dest->addrtype == TIPC_ADDR_NAME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) tsk->conn_type = dest->addr.name.name.type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) tsk->conn_instance = dest->addr.name.name.instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) msg_set_syn(hdr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) seq = &dest->addr.nameseq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) if (dest->addrtype == TIPC_ADDR_MCAST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) return tipc_sendmcast(sock, seq, m, dlen, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) if (dest->addrtype == TIPC_ADDR_NAME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) type = dest->addr.name.name.type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) inst = dest->addr.name.name.instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) dnode = dest->addr.name.domain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) dport = tipc_nametbl_translate(net, type, inst, &dnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) if (unlikely(!dport && !dnode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) return -EHOSTUNREACH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) } else if (dest->addrtype == TIPC_ADDR_ID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) dnode = dest->addr.id.node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) /* Block or return if destination link is congested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) rc = tipc_wait_for_cond(sock, &timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) !tipc_dest_find(clinks, dnode, 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) if (dest->addrtype == TIPC_ADDR_NAME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) msg_set_type(hdr, TIPC_NAMED_MSG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) msg_set_hdr_sz(hdr, NAMED_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) msg_set_nametype(hdr, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) msg_set_nameinst(hdr, inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) msg_set_lookup_scope(hdr, tipc_node2scope(dnode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) msg_set_destnode(hdr, dnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) msg_set_destport(hdr, dport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) } else { /* TIPC_ADDR_ID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) msg_set_type(hdr, TIPC_DIRECT_MSG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) msg_set_lookup_scope(hdr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) msg_set_destnode(hdr, dnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) msg_set_destport(hdr, dest->addr.id.ref);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) msg_set_hdr_sz(hdr, BASIC_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) __skb_queue_head_init(&pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) mtu = tipc_node_get_mtu(net, dnode, tsk->portid, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) if (unlikely(rc != dlen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) if (unlikely(syn && !tipc_msg_skb_clone(&pkts, &sk->sk_write_queue))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) __skb_queue_purge(&pkts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) trace_tipc_sk_sendmsg(sk, skb_peek(&pkts), TIPC_DUMP_SK_SNDQ, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) if (unlikely(rc == -ELINKCONG)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) tipc_dest_push(clinks, dnode, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) tsk->cong_link_cnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) if (unlikely(syn && !rc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) tipc_set_sk_state(sk, TIPC_CONNECTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) if (dlen && timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) timeout = msecs_to_jiffies(timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) tipc_wait_for_connect(sock, &timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) return rc ? rc : dlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) * tipc_sendstream - send stream-oriented data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) * @m: data to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) * @dsz: total length of data to be transmitted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) * Used for SOCK_STREAM data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) * Returns the number of bytes sent on success (or partial success),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) * or errno if no data sent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) ret = __tipc_sendstream(sock, m, dsz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) struct sk_buff_head *txq = &sk->sk_write_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) struct tipc_msg *hdr = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) u32 dnode = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) int maxnagle = tsk->maxnagle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) int maxpkt = tsk->max_pkt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) int send, sent = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) int blocks, rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) if (unlikely(dlen > INT_MAX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) /* Handle implicit connection setup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) if (unlikely(dest && sk->sk_state == TIPC_OPEN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) rc = __tipc_sendmsg(sock, m, dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) if (dlen && dlen == rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) tsk->peer_caps = tipc_node_get_capabilities(net, dnode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) rc = tipc_wait_for_cond(sock, &timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) (!tsk->cong_link_cnt &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) !tsk_conn_cong(tsk) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) tipc_sk_connected(sk)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) blocks = tsk->snd_backlog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) if (tsk->oneway++ >= tsk->nagle_start && maxnagle &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) send <= maxnagle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) rc = tipc_msg_append(hdr, m, send, maxnagle, txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) if (unlikely(rc < 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) blocks += rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) tsk->msg_acc++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) if (blocks <= 64 && tsk->expect_ack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) tsk->snd_backlog = blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) sent += send;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) } else if (blocks > 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) tsk->pkt_cnt += skb_queue_len(txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) skb = skb_peek_tail(txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) if (skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) msg_set_ack_required(buf_msg(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) tsk->expect_ack = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) tsk->expect_ack = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) tsk->msg_acc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) tsk->pkt_cnt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) rc = tipc_msg_build(hdr, m, sent, send, maxpkt, txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) if (unlikely(rc != send))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) blocks += tsk_inc(tsk, send + MIN_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) trace_tipc_sk_sendstream(sk, skb_peek(txq),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) TIPC_DUMP_SK_SNDQ, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) rc = tipc_node_xmit(net, txq, dnode, tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) if (unlikely(rc == -ELINKCONG)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) tsk->cong_link_cnt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) if (likely(!rc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) tsk->snt_unacked += blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) tsk->snd_backlog = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) sent += send;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) } while (sent < dlen && !rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) return sent ? sent : rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) * tipc_send_packet - send a connection-oriented message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) * @m: message to send
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) * @dsz: length of data to be transmitted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) * Used for SOCK_SEQPACKET messages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) * Returns the number of bytes sent on success, or errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) if (dsz > TIPC_MAX_USER_MSG_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) return tipc_sendstream(sock, m, dsz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) /* tipc_sk_finish_conn - complete the setup of a connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) u32 peer_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) struct tipc_msg *msg = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) msg_set_syn(msg, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) msg_set_destnode(msg, peer_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) msg_set_destport(msg, peer_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) msg_set_type(msg, TIPC_CONN_MSG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) msg_set_lookup_scope(msg, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) msg_set_hdr_sz(msg, SHORT_H_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) tipc_set_sk_state(sk, TIPC_ESTABLISHED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) tipc_node_add_conn(net, peer_node, tsk->portid, peer_port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) tsk->peer_caps = tipc_node_get_capabilities(net, peer_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) tsk_set_nagle(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) __skb_queue_purge(&sk->sk_write_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) /* Fall back to message based flow control */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) tsk->rcv_win = FLOWCTL_MSG_WIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) tsk->snd_win = FLOWCTL_MSG_WIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) * tipc_sk_set_orig_addr - capture sender's address for received message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) * @m: descriptor for message info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) * @skb: received message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) * Note: Address is not captured if not requested by receiver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) static void tipc_sk_set_orig_addr(struct msghdr *m, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) DECLARE_SOCKADDR(struct sockaddr_pair *, srcaddr, m->msg_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) struct tipc_msg *hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) if (!srcaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) srcaddr->sock.family = AF_TIPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) srcaddr->sock.addrtype = TIPC_ADDR_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) srcaddr->sock.scope = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) srcaddr->sock.addr.id.ref = msg_origport(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) srcaddr->sock.addr.id.node = msg_orignode(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) srcaddr->sock.addr.name.domain = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) m->msg_namelen = sizeof(struct sockaddr_tipc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) if (!msg_in_group(hdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) /* Group message users may also want to know sending member's id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) srcaddr->member.family = AF_TIPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) srcaddr->member.addrtype = TIPC_ADDR_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) srcaddr->member.scope = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) srcaddr->member.addr.name.name.type = msg_nametype(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) srcaddr->member.addr.name.name.instance = TIPC_SKB_CB(skb)->orig_member;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) srcaddr->member.addr.name.domain = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) m->msg_namelen = sizeof(*srcaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) * tipc_sk_anc_data_recv - optionally capture ancillary data for received message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) * @m: descriptor for message info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) * @skb: received message buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) * @tsk: TIPC port associated with message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) * Note: Ancillary data is not captured if not requested by receiver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) * Returns 0 if successful, otherwise errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) static int tipc_sk_anc_data_recv(struct msghdr *m, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) struct tipc_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) u32 anc_data[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) u32 err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) u32 dest_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) int has_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) if (likely(m->msg_controllen == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) msg = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) /* Optionally capture errored message object(s) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) err = msg ? msg_errcode(msg) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) anc_data[0] = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) anc_data[1] = msg_data_sz(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) if (anc_data[1]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) if (skb_linearize(skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) msg = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) msg_data(msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) /* Optionally capture message destination object */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) switch (dest_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) case TIPC_NAMED_MSG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) has_name = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) anc_data[0] = msg_nametype(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) anc_data[1] = msg_namelower(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) anc_data[2] = msg_namelower(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) case TIPC_MCAST_MSG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) has_name = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) anc_data[0] = msg_nametype(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) anc_data[1] = msg_namelower(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) anc_data[2] = msg_nameupper(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) case TIPC_CONN_MSG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) has_name = (tsk->conn_type != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) anc_data[0] = tsk->conn_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) anc_data[1] = tsk->conn_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) anc_data[2] = tsk->conn_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) has_name = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) if (has_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) static struct sk_buff *tipc_sk_build_ack(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) struct sk_buff *skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) struct tipc_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) u32 peer_port = tsk_peer_port(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) u32 dnode = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) if (!tipc_sk_connected(sk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) dnode, tsk_own_node(tsk), peer_port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) tsk->portid, TIPC_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) msg = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) msg_set_conn_ack(msg, tsk->rcv_unacked);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) tsk->rcv_unacked = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) /* Adjust to and advertize the correct window limit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) msg_set_adv_win(msg, tsk->rcv_win);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) return skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) static void tipc_sk_send_ack(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) skb = tipc_sk_build_ack(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) tipc_node_xmit_skb(sock_net(&tsk->sk), skb, tsk_peer_node(tsk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) msg_link_selector(buf_msg(skb)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) DEFINE_WAIT_FUNC(wait, woken_wake_function);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) long timeo = *timeop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) int err = sock_error(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) if (sk->sk_shutdown & RCV_SHUTDOWN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) err = -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) add_wait_queue(sk_sleep(sk), &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) sched_annotate_sleep();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) remove_wait_queue(sk_sleep(sk), &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) if (!skb_queue_empty(&sk->sk_receive_queue))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) err = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) if (!timeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) err = sock_intr_errno(timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) if (signal_pending(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) err = sock_error(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) *timeop = timeo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) * tipc_recvmsg - receive packet-oriented message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) * @m: descriptor for message info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) * @buflen: length of user buffer area
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) * @flags: receive flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) * If the complete message doesn't fit in user area, truncate it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) * Returns size of returned message data, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) static int tipc_recvmsg(struct socket *sock, struct msghdr *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) size_t buflen, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) bool connected = !tipc_sk_type_connectionless(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) int rc, err, hlen, dlen, copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) struct tipc_skb_cb *skb_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) struct sk_buff_head xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) struct tipc_msg *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) bool grp_evt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) /* Catch invalid receive requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) if (unlikely(!buflen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) if (unlikely(connected && sk->sk_state == TIPC_OPEN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) rc = -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) /* Step rcv queue to first msg with data or error; wait if necessary */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) rc = tipc_wait_for_rcvmsg(sock, &timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) skb = skb_peek(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) skb_cb = TIPC_SKB_CB(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) dlen = msg_data_sz(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) hlen = msg_hdr_sz(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) err = msg_errcode(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) grp_evt = msg_is_grp_evt(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) if (likely(dlen || err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) tsk_advance_rx_queue(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) } while (1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) /* Collect msg meta data, including error code and rejected data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) tipc_sk_set_orig_addr(m, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) rc = tipc_sk_anc_data_recv(m, skb, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) /* Capture data if non-error msg, otherwise just set return value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) if (likely(!err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) int offset = skb_cb->bytes_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) copy = min_t(int, dlen - offset, buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) if (unlikely(offset + copy < dlen)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) if (flags & MSG_EOR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) if (!(flags & MSG_PEEK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) skb_cb->bytes_read = offset + copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) m->msg_flags |= MSG_TRUNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) skb_cb->bytes_read = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) if (flags & MSG_EOR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) m->msg_flags |= MSG_EOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) skb_cb->bytes_read = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) copy = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) if (err != TIPC_CONN_SHUTDOWN && connected && !m->msg_control) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) rc = -ECONNRESET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) /* Mark message as group event if applicable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) if (unlikely(grp_evt)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) if (msg_grp_evt(hdr) == TIPC_WITHDRAWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) m->msg_flags |= MSG_EOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) m->msg_flags |= MSG_OOB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) copy = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) /* Caption of data or error code/rejected data was successful */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) if (unlikely(flags & MSG_PEEK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) /* Send group flow control advertisement when applicable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) if (tsk->group && msg_in_group(hdr) && !grp_evt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) __skb_queue_head_init(&xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) tipc_group_update_rcv_win(tsk->group, tsk_blocks(hlen + dlen),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) msg_orignode(hdr), msg_origport(hdr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) tipc_node_distr_xmit(sock_net(sk), &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) if (skb_cb->bytes_read)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) tsk_advance_rx_queue(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) if (likely(!connected))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) /* Send connection flow control advertisement when applicable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) tipc_sk_send_ack(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) return rc ? rc : copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) * tipc_recvstream - receive stream-oriented data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) * @m: descriptor for message info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) * @buflen: total size of user buffer area
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) * @flags: receive flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) * Used for SOCK_STREAM messages only. If not enough data is available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) * will optionally wait for more; never truncates data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) * Returns size of returned message data, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) static int tipc_recvstream(struct socket *sock, struct msghdr *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) size_t buflen, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) struct tipc_msg *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) struct tipc_skb_cb *skb_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) bool peek = flags & MSG_PEEK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) int offset, required, copy, copied = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) int hlen, dlen, err, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) /* Catch invalid receive attempts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) if (unlikely(!buflen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) if (unlikely(sk->sk_state == TIPC_OPEN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) rc = -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) required = sock_rcvlowat(sk, flags & MSG_WAITALL, buflen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) /* Look at first msg in receive queue; wait if necessary */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) rc = tipc_wait_for_rcvmsg(sock, &timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) skb = skb_peek(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) skb_cb = TIPC_SKB_CB(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) dlen = msg_data_sz(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) hlen = msg_hdr_sz(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) err = msg_errcode(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) /* Discard any empty non-errored (SYN-) message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) if (unlikely(!dlen && !err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) tsk_advance_rx_queue(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) /* Collect msg meta data, incl. error code and rejected data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) if (!copied) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) tipc_sk_set_orig_addr(m, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) rc = tipc_sk_anc_data_recv(m, skb, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) /* Copy data if msg ok, otherwise return error/partial data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) if (likely(!err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) offset = skb_cb->bytes_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) copy = min_t(int, dlen - offset, buflen - copied);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) if (unlikely(rc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) copied += copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) offset += copy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) if (unlikely(offset < dlen)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) if (!peek)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) skb_cb->bytes_read = offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) if ((err != TIPC_CONN_SHUTDOWN) && !m->msg_control)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) rc = -ECONNRESET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) if (copied || rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) if (unlikely(peek))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) tsk_advance_rx_queue(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) /* Send connection flow control advertisement when applicable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) tipc_sk_send_ack(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) /* Exit if all requested data or FIN/error received */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) if (copied == buflen || err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) } while (!skb_queue_empty(&sk->sk_receive_queue) || copied < required);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) return copied ? copied : rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) * tipc_write_space - wake up thread if port congestion is released
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) * @sk: socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) static void tipc_write_space(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) struct socket_wq *wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) wq = rcu_dereference(sk->sk_wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) if (skwq_has_sleeper(wq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) wake_up_interruptible_sync_poll(&wq->wait, EPOLLOUT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) EPOLLWRNORM | EPOLLWRBAND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) * tipc_data_ready - wake up threads to indicate messages have been received
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) * @sk: socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) static void tipc_data_ready(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) struct socket_wq *wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) wq = rcu_dereference(sk->sk_wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) if (skwq_has_sleeper(wq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) EPOLLRDNORM | EPOLLRDBAND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) static void tipc_sock_destruct(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) __skb_queue_purge(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) static void tipc_sk_proto_rcv(struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) struct sk_buff_head *inputq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) struct sk_buff_head *xmitq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) struct sk_buff *skb = __skb_dequeue(inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) struct tipc_msg *hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) struct tipc_group *grp = tsk->group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) bool wakeup = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) switch (msg_user(hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) case CONN_MANAGER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) tipc_sk_conn_proto_rcv(tsk, skb, inputq, xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) case SOCK_WAKEUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) tipc_dest_del(&tsk->cong_links, msg_orignode(hdr), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) /* coupled with smp_rmb() in tipc_wait_for_cond() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) tsk->cong_link_cnt--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162) wakeup = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) tipc_sk_push_backlog(tsk, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) case GROUP_PROTOCOL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166) tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) case TOP_SRV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) hdr, inputq, xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) if (wakeup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) sk->sk_write_space(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) * tipc_sk_filter_connect - check incoming message for a connection-based socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184) * @tsk: TIPC socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) * @skb: pointer to message buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) * @xmitq: for Nagle ACK if any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187) * Returns true if message should be added to receive queue, false otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189) static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) struct sk_buff_head *xmitq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) struct tipc_msg *hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195) bool con_msg = msg_connected(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) u32 pport = tsk_peer_port(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197) u32 pnode = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) u32 oport = msg_origport(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) u32 onode = msg_orignode(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) int err = msg_errcode(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) unsigned long delay;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) if (unlikely(msg_mcast(hdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205) tsk->oneway = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207) switch (sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208) case TIPC_CONNECTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) /* Setup ACK */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) if (likely(con_msg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213) tipc_sk_finish_conn(tsk, oport, onode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214) msg_set_importance(&tsk->phdr, msg_importance(hdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215) /* ACK+ message with data is added to receive queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216) if (msg_data_sz(hdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218) /* Empty ACK-, - wake up sleeping connect() and drop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219) sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220) msg_set_dest_droppable(hdr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223) /* Ignore connectionless message if not from listening socket */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) if (oport != pport || onode != pnode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227) /* Rejected SYN */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) if (err != TIPC_ERR_OVERLOAD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231) /* Prepare for new setup attempt if we have a SYN clone */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232) if (skb_queue_empty(&sk->sk_write_queue))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234) get_random_bytes(&delay, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235) delay %= (tsk->conn_timeout / 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) delay = msecs_to_jiffies(delay + 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) sk_reset_timer(sk, &sk->sk_timer, jiffies + delay);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239) case TIPC_OPEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240) case TIPC_DISCONNECTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) case TIPC_LISTEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243) /* Accept only SYN message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244) if (!msg_is_syn(hdr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245) tipc_node_get_capabilities(net, onode) & TIPC_SYN_BIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247) if (!con_msg && !err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250) case TIPC_ESTABLISHED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251) if (!skb_queue_empty(&sk->sk_write_queue))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252) tipc_sk_push_backlog(tsk, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253) /* Accept only connection-based messages sent by peer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254) if (likely(con_msg && !err && pport == oport &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255) pnode == onode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256) if (msg_ack_required(hdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) skb = tipc_sk_build_ack(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260) if (skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261) msg_set_nagle_ack(buf_msg(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262) __skb_queue_tail(xmitq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) if (!tsk_peer_msg(tsk, hdr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271) tipc_set_sk_state(sk, TIPC_DISCONNECTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272) tipc_node_remove_conn(net, pnode, tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273) sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276) pr_err("Unknown sk_state %u\n", sk->sk_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278) /* Abort connection setup attempt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279) tipc_set_sk_state(sk, TIPC_DISCONNECTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) sk->sk_err = ECONNREFUSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281) sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286) * rcvbuf_limit - get proper overload limit of socket receive queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) * @sk: socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288) * @skb: message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) * For connection oriented messages, irrespective of importance,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291) * default queue limit is 2 MB.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293) * For connectionless messages, queue limits are based on message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) * importance as follows:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) * TIPC_LOW_IMPORTANCE (2 MB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297) * TIPC_MEDIUM_IMPORTANCE (4 MB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298) * TIPC_HIGH_IMPORTANCE (8 MB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299) * TIPC_CRITICAL_IMPORTANCE (16 MB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301) * Returns overload limit according to corresponding message importance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303) static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) struct tipc_msg *hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308) if (unlikely(msg_in_group(hdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309) return READ_ONCE(sk->sk_rcvbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311) if (unlikely(!msg_connected(hdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312) return READ_ONCE(sk->sk_rcvbuf) << msg_importance(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2314) if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2315) return READ_ONCE(sk->sk_rcvbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2317) return FLOWCTL_MSG_LIM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2320) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2321) * tipc_sk_filter_rcv - validate incoming message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2322) * @sk: socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2323) * @skb: pointer to message.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2324) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2325) * Enqueues message on receive queue if acceptable; optionally handles
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2326) * disconnect indication for a connected socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2327) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2328) * Called with socket lock already taken
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2329) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2330) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2331) static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2332) struct sk_buff_head *xmitq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2333) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2334) bool sk_conn = !tipc_sk_type_connectionless(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2335) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2336) struct tipc_group *grp = tsk->group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2337) struct tipc_msg *hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2338) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2339) struct sk_buff_head inputq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2340) int mtyp = msg_type(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2341) int limit, err = TIPC_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2343) trace_tipc_sk_filter_rcv(sk, skb, TIPC_DUMP_ALL, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2344) TIPC_SKB_CB(skb)->bytes_read = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2345) __skb_queue_head_init(&inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2346) __skb_queue_tail(&inputq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2348) if (unlikely(!msg_isdata(hdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2349) tipc_sk_proto_rcv(sk, &inputq, xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2351) if (unlikely(grp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2352) tipc_group_filter_msg(grp, &inputq, xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2354) if (unlikely(!grp) && mtyp == TIPC_MCAST_MSG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2355) tipc_mcast_filter_msg(net, &tsk->mc_method.deferredq, &inputq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2357) /* Validate and add to receive buffer if there is space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2358) while ((skb = __skb_dequeue(&inputq))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2359) hdr = buf_msg(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2360) limit = rcvbuf_limit(sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2361) if ((sk_conn && !tipc_sk_filter_connect(tsk, skb, xmitq)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2362) (!sk_conn && msg_connected(hdr)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2363) (!grp && msg_in_group(hdr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2364) err = TIPC_ERR_NO_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2365) else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2366) trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2367) "err_overload2!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2368) atomic_inc(&sk->sk_drops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2369) err = TIPC_ERR_OVERLOAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2372) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2373) if (tipc_msg_reverse(tipc_own_addr(net), &skb, err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2374) trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_NONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2375) "@filter_rcv!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2376) __skb_queue_tail(xmitq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2378) err = TIPC_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2379) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2381) __skb_queue_tail(&sk->sk_receive_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2382) skb_set_owner_r(skb, sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2383) trace_tipc_sk_overlimit2(sk, skb, TIPC_DUMP_ALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2384) "rcvq >90% allocated!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2385) sk->sk_data_ready(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2387) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2389) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2390) * tipc_sk_backlog_rcv - handle incoming message from backlog queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2391) * @sk: socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2392) * @skb: message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2393) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2394) * Caller must hold socket lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2395) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2396) static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2398) unsigned int before = sk_rmem_alloc_get(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2399) struct sk_buff_head xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2400) unsigned int added;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2402) __skb_queue_head_init(&xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2404) tipc_sk_filter_rcv(sk, skb, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2405) added = sk_rmem_alloc_get(sk) - before;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2406) atomic_add(added, &tipc_sk(sk)->dupl_rcvcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2408) /* Send pending response/rejected messages, if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2409) tipc_node_distr_xmit(sock_net(sk), &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2410) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2413) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2414) * tipc_sk_enqueue - extract all buffers with destination 'dport' from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2415) * inputq and try adding them to socket or backlog queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2416) * @inputq: list of incoming buffers with potentially different destinations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2417) * @sk: socket where the buffers should be enqueued
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2418) * @dport: port number for the socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2419) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2420) * Caller must hold socket lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2421) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2422) static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2423) u32 dport, struct sk_buff_head *xmitq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2424) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2425) unsigned long time_limit = jiffies + usecs_to_jiffies(20000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2426) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2427) unsigned int lim;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2428) atomic_t *dcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2429) u32 onode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2431) while (skb_queue_len(inputq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2432) if (unlikely(time_after_eq(jiffies, time_limit)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2433) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2435) skb = tipc_skb_dequeue(inputq, dport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2436) if (unlikely(!skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2437) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2439) /* Add message directly to receive queue if possible */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2440) if (!sock_owned_by_user(sk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2441) tipc_sk_filter_rcv(sk, skb, xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2442) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2445) /* Try backlog, compensating for double-counted bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2446) dcnt = &tipc_sk(sk)->dupl_rcvcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2447) if (!sk->sk_backlog.len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2448) atomic_set(dcnt, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2449) lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2450) if (likely(!sk_add_backlog(sk, skb, lim))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2451) trace_tipc_sk_overlimit1(sk, skb, TIPC_DUMP_ALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2452) "bklg & rcvq >90% allocated!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2453) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2456) trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL, "err_overload!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2457) /* Overload => reject message back to sender */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2458) onode = tipc_own_addr(sock_net(sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2459) atomic_inc(&sk->sk_drops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2460) if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2461) trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_ALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2462) "@sk_enqueue!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2463) __skb_queue_tail(xmitq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2465) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2467) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2469) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2470) * tipc_sk_rcv - handle a chain of incoming buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2471) * @inputq: buffer list containing the buffers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2472) * Consumes all buffers in list until inputq is empty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2473) * Note: may be called in multiple threads referring to the same queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2474) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2475) void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2476) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2477) struct sk_buff_head xmitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2478) u32 dnode, dport = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2479) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2480) struct tipc_sock *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2481) struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2482) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2484) __skb_queue_head_init(&xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2485) while (skb_queue_len(inputq)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2486) dport = tipc_skb_peek_port(inputq, dport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2487) tsk = tipc_sk_lookup(net, dport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2489) if (likely(tsk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2490) sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2491) if (likely(spin_trylock_bh(&sk->sk_lock.slock))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2492) tipc_sk_enqueue(inputq, sk, dport, &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2493) spin_unlock_bh(&sk->sk_lock.slock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2495) /* Send pending response/rejected messages, if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2496) tipc_node_distr_xmit(sock_net(sk), &xmitq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2497) sock_put(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2498) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2500) /* No destination socket => dequeue skb if still there */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2501) skb = tipc_skb_dequeue(inputq, dport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2502) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2503) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2505) /* Try secondary lookup if unresolved named message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2506) err = TIPC_ERR_NO_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2507) if (tipc_msg_lookup_dest(net, skb, &err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2508) goto xmit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2510) /* Prepare for message rejection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2511) if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2512) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2514) trace_tipc_sk_rej_msg(NULL, skb, TIPC_DUMP_NONE, "@sk_rcv!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2515) xmit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2516) dnode = msg_destnode(buf_msg(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2517) tipc_node_xmit_skb(net, skb, dnode, dport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2521) static int tipc_wait_for_connect(struct socket *sock, long *timeo_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2522) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2523) DEFINE_WAIT_FUNC(wait, woken_wake_function);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2524) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2525) int done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2527) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2528) int err = sock_error(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2529) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2530) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2531) if (!*timeo_p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2532) return -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2533) if (signal_pending(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2534) return sock_intr_errno(*timeo_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2535) if (sk->sk_state == TIPC_DISCONNECTING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2536) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2538) add_wait_queue(sk_sleep(sk), &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2539) done = sk_wait_event(sk, timeo_p, tipc_sk_connected(sk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2540) &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2541) remove_wait_queue(sk_sleep(sk), &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2542) } while (!done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2543) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2546) static bool tipc_sockaddr_is_sane(struct sockaddr_tipc *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2547) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2548) if (addr->family != AF_TIPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2549) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2550) if (addr->addrtype == TIPC_SERVICE_RANGE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2551) return (addr->addr.nameseq.lower <= addr->addr.nameseq.upper);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2552) return (addr->addrtype == TIPC_SERVICE_ADDR ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2553) addr->addrtype == TIPC_SOCKET_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2556) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2557) * tipc_connect - establish a connection to another TIPC port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2558) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2559) * @dest: socket address for destination port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2560) * @destlen: size of socket address data structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2561) * @flags: file-related flags associated with socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2562) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2563) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2564) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2565) static int tipc_connect(struct socket *sock, struct sockaddr *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2566) int destlen, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2567) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2568) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2569) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2570) struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2571) struct msghdr m = {NULL,};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2572) long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2573) int previous;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2574) int res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2576) if (destlen != sizeof(struct sockaddr_tipc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2577) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2579) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2581) if (tsk->group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2582) res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2583) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2584) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2586) if (dst->family == AF_UNSPEC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2587) memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2588) if (!tipc_sk_type_connectionless(sk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2589) res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2590) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2592) if (!tipc_sockaddr_is_sane(dst)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2593) res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2594) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2595) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2596) /* DGRAM/RDM connect(), just save the destaddr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2597) if (tipc_sk_type_connectionless(sk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2598) memcpy(&tsk->peer, dest, destlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2599) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2600) } else if (dst->addrtype == TIPC_SERVICE_RANGE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2601) res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2602) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2603) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2605) previous = sk->sk_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2607) switch (sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2608) case TIPC_OPEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2609) /* Send a 'SYN-' to destination */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2610) m.msg_name = dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2611) m.msg_namelen = destlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2613) /* If connect is in non-blocking case, set MSG_DONTWAIT to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2614) * indicate send_msg() is never blocked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2615) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2616) if (!timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2617) m.msg_flags = MSG_DONTWAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2619) res = __tipc_sendmsg(sock, &m, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2620) if ((res < 0) && (res != -EWOULDBLOCK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2621) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2623) /* Just entered TIPC_CONNECTING state; the only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2624) * difference is that return value in non-blocking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2625) * case is EINPROGRESS, rather than EALREADY.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2626) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2627) res = -EINPROGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2628) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2629) case TIPC_CONNECTING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2630) if (!timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2631) if (previous == TIPC_CONNECTING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2632) res = -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2633) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2635) timeout = msecs_to_jiffies(timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2636) /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2637) res = tipc_wait_for_connect(sock, &timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2638) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2639) case TIPC_ESTABLISHED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2640) res = -EISCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2641) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2642) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2643) res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2644) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2646) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2647) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2648) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2651) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2652) * tipc_listen - allow socket to listen for incoming connections
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2653) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2654) * @len: (unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2655) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2656) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2657) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2658) static int tipc_listen(struct socket *sock, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2659) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2660) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2661) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2663) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2664) res = tipc_set_sk_state(sk, TIPC_LISTEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2665) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2667) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2668) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2670) static int tipc_wait_for_accept(struct socket *sock, long timeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2671) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2672) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2673) DEFINE_WAIT_FUNC(wait, woken_wake_function);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2674) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2676) /* True wake-one mechanism for incoming connections: only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2677) * one process gets woken up, not the 'whole herd'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2678) * Since we do not 'race & poll' for established sockets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2679) * anymore, the common case will execute the loop only once.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2680) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2681) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2682) if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2683) add_wait_queue(sk_sleep(sk), &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2684) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2685) timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2686) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2687) remove_wait_queue(sk_sleep(sk), &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2689) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2690) if (!skb_queue_empty(&sk->sk_receive_queue))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2691) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2692) err = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2693) if (!timeo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2694) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2695) err = sock_intr_errno(timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2696) if (signal_pending(current))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2697) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2699) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2702) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2703) * tipc_accept - wait for connection request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2704) * @sock: listening socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2705) * @new_sock: new socket that is to be connected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2706) * @flags: file-related flags associated with socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2707) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2708) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2709) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2710) static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2711) bool kern)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2712) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2713) struct sock *new_sk, *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2714) struct tipc_sock *new_tsock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2715) struct msghdr m = {NULL,};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2716) struct tipc_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2717) struct sk_buff *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2718) long timeo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2719) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2721) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2722)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2723) if (sk->sk_state != TIPC_LISTEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2724) res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2725) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2726) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2727) timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2728) res = tipc_wait_for_accept(sock, timeo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2729) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2730) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2732) buf = skb_peek(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2734) res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2735) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2736) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2737) security_sk_clone(sock->sk, new_sock->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2739) new_sk = new_sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2740) new_tsock = tipc_sk(new_sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2741) msg = buf_msg(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2743) /* we lock on new_sk; but lockdep sees the lock on sk */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2744) lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2746) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2747) * Reject any stray messages received by new socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2748) * before the socket lock was taken (very, very unlikely)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2749) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2750) tsk_rej_rx_queue(new_sk, TIPC_ERR_NO_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2752) /* Connect new socket to it's peer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2753) tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2755) tsk_set_importance(new_sk, msg_importance(msg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2756) if (msg_named(msg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2757) new_tsock->conn_type = msg_nametype(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2758) new_tsock->conn_instance = msg_nameinst(msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2759) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2761) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2762) * Respond to 'SYN-' by discarding it & returning 'ACK'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2763) * Respond to 'SYN+' by queuing it on new socket & returning 'ACK'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2764) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2765) if (!msg_data_sz(msg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2766) tsk_advance_rx_queue(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2767) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2768) __skb_dequeue(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2769) __skb_queue_head(&new_sk->sk_receive_queue, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2770) skb_set_owner_r(buf, new_sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2771) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2772) __tipc_sendstream(new_sock, &m, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2773) release_sock(new_sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2774) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2775) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2776) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2777) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2779) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2780) * tipc_shutdown - shutdown socket connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2781) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2782) * @how: direction to close (must be SHUT_RDWR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2783) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2784) * Terminates connection (if necessary), then purges socket's receive queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2785) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2786) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2787) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2788) static int tipc_shutdown(struct socket *sock, int how)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2789) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2790) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2791) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2793) if (how != SHUT_RDWR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2794) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2796) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2798) trace_tipc_sk_shutdown(sk, NULL, TIPC_DUMP_ALL, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2799) __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2800) sk->sk_shutdown = SHUTDOWN_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2802) if (sk->sk_state == TIPC_DISCONNECTING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2803) /* Discard any unreceived messages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2804) __skb_queue_purge(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2806) res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2807) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2808) res = -ENOTCONN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2809) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2810) /* Wake up anyone sleeping in poll. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2811) sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2813) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2814) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2815) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2817) static void tipc_sk_check_probing_state(struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2818) struct sk_buff_head *list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2819) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2820) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2821) u32 pnode = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2822) u32 pport = tsk_peer_port(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2823) u32 self = tsk_own_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2824) u32 oport = tsk->portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2825) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2827) if (tsk->probe_unacked) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2828) tipc_set_sk_state(sk, TIPC_DISCONNECTING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2829) sk->sk_err = ECONNABORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2830) tipc_node_remove_conn(sock_net(sk), pnode, pport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2831) sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2832) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2834) /* Prepare new probe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2835) skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2836) pnode, self, pport, oport, TIPC_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2837) if (skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2838) __skb_queue_tail(list, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2839) tsk->probe_unacked = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2840) sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2841) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2843) static void tipc_sk_retry_connect(struct sock *sk, struct sk_buff_head *list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2844) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2845) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2847) /* Try again later if dest link is congested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2848) if (tsk->cong_link_cnt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2849) sk_reset_timer(sk, &sk->sk_timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2850) jiffies + msecs_to_jiffies(100));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2851) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2852) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2853) /* Prepare SYN for retransmit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2854) tipc_msg_skb_clone(&sk->sk_write_queue, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2855) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2857) static void tipc_sk_timeout(struct timer_list *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2858) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2859) struct sock *sk = from_timer(sk, t, sk_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2860) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2861) u32 pnode = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2862) struct sk_buff_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2863) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2864)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2865) __skb_queue_head_init(&list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2866) bh_lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2868) /* Try again later if socket is busy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2869) if (sock_owned_by_user(sk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2870) sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2871) bh_unlock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2872) sock_put(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2873) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2874) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2876) if (sk->sk_state == TIPC_ESTABLISHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2877) tipc_sk_check_probing_state(sk, &list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2878) else if (sk->sk_state == TIPC_CONNECTING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2879) tipc_sk_retry_connect(sk, &list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2881) bh_unlock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2883) if (!skb_queue_empty(&list))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2884) rc = tipc_node_xmit(sock_net(sk), &list, pnode, tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2886) /* SYN messages may cause link congestion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2887) if (rc == -ELINKCONG) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2888) tipc_dest_push(&tsk->cong_links, pnode, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2889) tsk->cong_link_cnt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2890) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2891) sock_put(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2892) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2894) static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2895) struct tipc_name_seq const *seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2896) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2897) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2898) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2899) struct publication *publ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2900) u32 key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2902) if (scope != TIPC_NODE_SCOPE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2903) scope = TIPC_CLUSTER_SCOPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2905) if (tipc_sk_connected(sk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2906) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2907) key = tsk->portid + tsk->pub_count + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2908) if (key == tsk->portid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2909) return -EADDRINUSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2911) publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2912) scope, tsk->portid, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2913) if (unlikely(!publ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2914) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2916) list_add(&publ->binding_sock, &tsk->publications);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2917) tsk->pub_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2918) tsk->published = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2919) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2920) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2922) static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2923) struct tipc_name_seq const *seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2924) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2925) struct net *net = sock_net(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2926) struct publication *publ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2927) struct publication *safe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2928) int rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2930) if (scope != TIPC_NODE_SCOPE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2931) scope = TIPC_CLUSTER_SCOPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2933) list_for_each_entry_safe(publ, safe, &tsk->publications, binding_sock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2934) if (seq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2935) if (publ->scope != scope)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2936) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2937) if (publ->type != seq->type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2938) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2939) if (publ->lower != seq->lower)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2940) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2941) if (publ->upper != seq->upper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2942) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2943) tipc_nametbl_withdraw(net, publ->type, publ->lower,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2944) publ->upper, publ->key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2945) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2946) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2947) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2948) tipc_nametbl_withdraw(net, publ->type, publ->lower,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2949) publ->upper, publ->key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2950) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2951) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2952) if (list_empty(&tsk->publications))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2953) tsk->published = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2954) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2955) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2957) /* tipc_sk_reinit: set non-zero address in all existing sockets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2958) * when we go from standalone to network mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2959) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2960) void tipc_sk_reinit(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2961) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2962) struct tipc_net *tn = net_generic(net, tipc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2963) struct rhashtable_iter iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2964) struct tipc_sock *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2965) struct tipc_msg *msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2967) rhashtable_walk_enter(&tn->sk_rht, &iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2969) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2970) rhashtable_walk_start(&iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2972) while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2973) sock_hold(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2974) rhashtable_walk_stop(&iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2975) lock_sock(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2976) msg = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2977) msg_set_prevnode(msg, tipc_own_addr(net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2978) msg_set_orignode(msg, tipc_own_addr(net));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2979) release_sock(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2980) rhashtable_walk_start(&iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2981) sock_put(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2982) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2984) rhashtable_walk_stop(&iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2985) } while (tsk == ERR_PTR(-EAGAIN));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2987) rhashtable_walk_exit(&iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2988) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2990) static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2991) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2992) struct tipc_net *tn = net_generic(net, tipc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2993) struct tipc_sock *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2995) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2996) tsk = rhashtable_lookup(&tn->sk_rht, &portid, tsk_rht_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2997) if (tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2998) sock_hold(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2999) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3001) return tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3002) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3004) static int tipc_sk_insert(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3005) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3006) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3007) struct net *net = sock_net(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3008) struct tipc_net *tn = net_generic(net, tipc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3009) u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3010) u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3012) while (remaining--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3013) portid++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3014) if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3015) portid = TIPC_MIN_PORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3016) tsk->portid = portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3017) sock_hold(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3018) if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3019) tsk_rht_params))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3020) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3021) sock_put(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3022) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3024) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3025) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3027) static void tipc_sk_remove(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3028) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3029) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3030) struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3032) if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3033) WARN_ON(refcount_read(&sk->sk_refcnt) == 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3034) __sock_put(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3035) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3036) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3037)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3038) static const struct rhashtable_params tsk_rht_params = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3039) .nelem_hint = 192,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3040) .head_offset = offsetof(struct tipc_sock, node),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3041) .key_offset = offsetof(struct tipc_sock, portid),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3042) .key_len = sizeof(u32), /* portid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3043) .max_size = 1048576,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3044) .min_size = 256,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3045) .automatic_shrinking = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3046) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3048) int tipc_sk_rht_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3049) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3050) struct tipc_net *tn = net_generic(net, tipc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3051)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3052) return rhashtable_init(&tn->sk_rht, &tsk_rht_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3053) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3055) void tipc_sk_rht_destroy(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3056) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3057) struct tipc_net *tn = net_generic(net, tipc_net_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3059) /* Wait for socket readers to complete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3060) synchronize_net();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3061)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3062) rhashtable_destroy(&tn->sk_rht);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3063) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3065) static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3066) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3067) struct net *net = sock_net(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3068) struct tipc_group *grp = tsk->group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3069) struct tipc_msg *hdr = &tsk->phdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3070) struct tipc_name_seq seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3071) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3072)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3073) if (mreq->type < TIPC_RESERVED_TYPES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3074) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3075) if (mreq->scope > TIPC_NODE_SCOPE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3076) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3077) if (grp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3078) return -EACCES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3079) grp = tipc_group_create(net, tsk->portid, mreq, &tsk->group_is_open);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3080) if (!grp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3081) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3082) tsk->group = grp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3083) msg_set_lookup_scope(hdr, mreq->scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3084) msg_set_nametype(hdr, mreq->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3085) msg_set_dest_droppable(hdr, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3086) seq.type = mreq->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3087) seq.lower = mreq->instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3088) seq.upper = seq.lower;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3089) tipc_nametbl_build_group(net, grp, mreq->type, mreq->scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3090) rc = tipc_sk_publish(tsk, mreq->scope, &seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3091) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3092) tipc_group_delete(net, grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3093) tsk->group = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3094) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3095) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3096) /* Eliminate any risk that a broadcast overtakes sent JOINs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3097) tsk->mc_method.rcast = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3098) tsk->mc_method.mandatory = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3099) tipc_group_join(net, grp, &tsk->sk.sk_rcvbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3100) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3103) static int tipc_sk_leave(struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3105) struct net *net = sock_net(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3106) struct tipc_group *grp = tsk->group;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3107) struct tipc_name_seq seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3108) int scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3110) if (!grp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3111) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3112) tipc_group_self(grp, &seq, &scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3113) tipc_group_delete(net, grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3114) tsk->group = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3115) tipc_sk_withdraw(tsk, scope, &seq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3116) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3119) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3120) * tipc_setsockopt - set socket option
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3121) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3122) * @lvl: option level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3123) * @opt: option identifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3124) * @ov: pointer to new option value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3125) * @ol: length of option value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3126) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3127) * For stream sockets only, accepts and ignores all IPPROTO_TCP options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3128) * (to ease compatibility).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3129) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3130) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3131) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3132) static int tipc_setsockopt(struct socket *sock, int lvl, int opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3133) sockptr_t ov, unsigned int ol)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3135) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3136) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3137) struct tipc_group_req mreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3138) u32 value = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3139) int res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3141) if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3142) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3143) if (lvl != SOL_TIPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3144) return -ENOPROTOOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3146) switch (opt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3147) case TIPC_IMPORTANCE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3148) case TIPC_SRC_DROPPABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3149) case TIPC_DEST_DROPPABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3150) case TIPC_CONN_TIMEOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3151) case TIPC_NODELAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3152) if (ol < sizeof(value))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3153) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3154) if (copy_from_sockptr(&value, ov, sizeof(u32)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3155) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3156) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3157) case TIPC_GROUP_JOIN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3158) if (ol < sizeof(mreq))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3159) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3160) if (copy_from_sockptr(&mreq, ov, sizeof(mreq)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3161) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3162) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3163) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3164) if (!sockptr_is_null(ov) || ol)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3165) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3168) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3170) switch (opt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3171) case TIPC_IMPORTANCE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3172) res = tsk_set_importance(sk, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3173) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3174) case TIPC_SRC_DROPPABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3175) if (sock->type != SOCK_STREAM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3176) tsk_set_unreliable(tsk, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3177) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3178) res = -ENOPROTOOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3179) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3180) case TIPC_DEST_DROPPABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3181) tsk_set_unreturnable(tsk, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3182) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3183) case TIPC_CONN_TIMEOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3184) tipc_sk(sk)->conn_timeout = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3185) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3186) case TIPC_MCAST_BROADCAST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3187) tsk->mc_method.rcast = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3188) tsk->mc_method.mandatory = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3189) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3190) case TIPC_MCAST_REPLICAST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3191) tsk->mc_method.rcast = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3192) tsk->mc_method.mandatory = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3193) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3194) case TIPC_GROUP_JOIN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3195) res = tipc_sk_join(tsk, &mreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3196) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3197) case TIPC_GROUP_LEAVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3198) res = tipc_sk_leave(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3199) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3200) case TIPC_NODELAY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3201) tsk->nodelay = !!value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3202) tsk_set_nagle(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3203) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3204) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3205) res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3208) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3210) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3213) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3214) * tipc_getsockopt - get socket option
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3215) * @sock: socket structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3216) * @lvl: option level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3217) * @opt: option identifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3218) * @ov: receptacle for option value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3219) * @ol: receptacle for length of option value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3220) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3221) * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3222) * (to ease compatibility).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3223) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3224) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3225) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3226) static int tipc_getsockopt(struct socket *sock, int lvl, int opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3227) char __user *ov, int __user *ol)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3229) struct sock *sk = sock->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3230) struct tipc_sock *tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3231) struct tipc_name_seq seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3232) int len, scope;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3233) u32 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3234) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3236) if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3237) return put_user(0, ol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3238) if (lvl != SOL_TIPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3239) return -ENOPROTOOPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3240) res = get_user(len, ol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3241) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3242) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3244) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3246) switch (opt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3247) case TIPC_IMPORTANCE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3248) value = tsk_importance(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3249) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3250) case TIPC_SRC_DROPPABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3251) value = tsk_unreliable(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3252) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3253) case TIPC_DEST_DROPPABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3254) value = tsk_unreturnable(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3255) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3256) case TIPC_CONN_TIMEOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3257) value = tsk->conn_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3258) /* no need to set "res", since already 0 at this point */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3259) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3260) case TIPC_NODE_RECVQ_DEPTH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3261) value = 0; /* was tipc_queue_size, now obsolete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3262) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3263) case TIPC_SOCK_RECVQ_DEPTH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3264) value = skb_queue_len(&sk->sk_receive_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3265) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3266) case TIPC_SOCK_RECVQ_USED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3267) value = sk_rmem_alloc_get(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3268) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3269) case TIPC_GROUP_JOIN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3270) seq.type = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3271) if (tsk->group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3272) tipc_group_self(tsk->group, &seq, &scope);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3273) value = seq.type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3274) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3275) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3276) res = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3279) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3281) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3282) return res; /* "get" failed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3284) if (len < sizeof(value))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3285) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3287) if (copy_to_user(ov, &value, sizeof(value)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3288) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3290) return put_user(sizeof(value), ol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3293) static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3295) struct net *net = sock_net(sock->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3296) struct tipc_sioc_nodeid_req nr = {0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3297) struct tipc_sioc_ln_req lnr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3298) void __user *argp = (void __user *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3300) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3301) case SIOCGETLINKNAME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3302) if (copy_from_user(&lnr, argp, sizeof(lnr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3303) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3304) if (!tipc_node_get_linkname(net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3305) lnr.bearer_id & 0xffff, lnr.peer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3306) lnr.linkname, TIPC_MAX_LINK_NAME)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3307) if (copy_to_user(argp, &lnr, sizeof(lnr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3308) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3309) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3311) return -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3312) case SIOCGETNODEID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3313) if (copy_from_user(&nr, argp, sizeof(nr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3314) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3315) if (!tipc_node_get_id(net, nr.peer, nr.node_id))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3316) return -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3317) if (copy_to_user(argp, &nr, sizeof(nr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3318) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3319) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3320) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3321) return -ENOIOCTLCMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3325) static int tipc_socketpair(struct socket *sock1, struct socket *sock2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3326) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3327) struct tipc_sock *tsk2 = tipc_sk(sock2->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3328) struct tipc_sock *tsk1 = tipc_sk(sock1->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3329) u32 onode = tipc_own_addr(sock_net(sock1->sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3331) tsk1->peer.family = AF_TIPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3332) tsk1->peer.addrtype = TIPC_ADDR_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3333) tsk1->peer.scope = TIPC_NODE_SCOPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3334) tsk1->peer.addr.id.ref = tsk2->portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3335) tsk1->peer.addr.id.node = onode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3336) tsk2->peer.family = AF_TIPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3337) tsk2->peer.addrtype = TIPC_ADDR_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3338) tsk2->peer.scope = TIPC_NODE_SCOPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3339) tsk2->peer.addr.id.ref = tsk1->portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3340) tsk2->peer.addr.id.node = onode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3342) tipc_sk_finish_conn(tsk1, tsk2->portid, onode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3343) tipc_sk_finish_conn(tsk2, tsk1->portid, onode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3344) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3347) /* Protocol switches for the various types of TIPC sockets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3349) static const struct proto_ops msg_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3350) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3351) .family = AF_TIPC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3352) .release = tipc_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3353) .bind = tipc_bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3354) .connect = tipc_connect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3355) .socketpair = tipc_socketpair,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3356) .accept = sock_no_accept,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3357) .getname = tipc_getname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3358) .poll = tipc_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3359) .ioctl = tipc_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3360) .listen = sock_no_listen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3361) .shutdown = tipc_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3362) .setsockopt = tipc_setsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3363) .getsockopt = tipc_getsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3364) .sendmsg = tipc_sendmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3365) .recvmsg = tipc_recvmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3366) .mmap = sock_no_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3367) .sendpage = sock_no_sendpage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3368) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3370) static const struct proto_ops packet_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3371) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3372) .family = AF_TIPC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3373) .release = tipc_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3374) .bind = tipc_bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3375) .connect = tipc_connect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3376) .socketpair = tipc_socketpair,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3377) .accept = tipc_accept,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3378) .getname = tipc_getname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3379) .poll = tipc_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3380) .ioctl = tipc_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3381) .listen = tipc_listen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3382) .shutdown = tipc_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3383) .setsockopt = tipc_setsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3384) .getsockopt = tipc_getsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3385) .sendmsg = tipc_send_packet,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3386) .recvmsg = tipc_recvmsg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3387) .mmap = sock_no_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3388) .sendpage = sock_no_sendpage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3389) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3391) static const struct proto_ops stream_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3392) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3393) .family = AF_TIPC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3394) .release = tipc_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3395) .bind = tipc_bind,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3396) .connect = tipc_connect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3397) .socketpair = tipc_socketpair,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3398) .accept = tipc_accept,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3399) .getname = tipc_getname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3400) .poll = tipc_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3401) .ioctl = tipc_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3402) .listen = tipc_listen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3403) .shutdown = tipc_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3404) .setsockopt = tipc_setsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3405) .getsockopt = tipc_getsockopt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3406) .sendmsg = tipc_sendstream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3407) .recvmsg = tipc_recvstream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3408) .mmap = sock_no_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3409) .sendpage = sock_no_sendpage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3410) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3412) static const struct net_proto_family tipc_family_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3413) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3414) .family = AF_TIPC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3415) .create = tipc_sk_create
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3416) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3418) static struct proto tipc_proto = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3419) .name = "TIPC",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3420) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3421) .obj_size = sizeof(struct tipc_sock),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3422) .sysctl_rmem = sysctl_tipc_rmem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3423) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3425) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3426) * tipc_socket_init - initialize TIPC socket interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3427) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3428) * Returns 0 on success, errno otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3429) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3430) int tipc_socket_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3431) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3432) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3434) res = proto_register(&tipc_proto, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3435) if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3436) pr_err("Failed to register TIPC protocol type\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3437) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3440) res = sock_register(&tipc_family_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3441) if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3442) pr_err("Failed to register TIPC socket type\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3443) proto_unregister(&tipc_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3444) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3446) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3447) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3450) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3451) * tipc_socket_stop - stop TIPC socket interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3452) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3453) void tipc_socket_stop(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3454) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3455) sock_unregister(tipc_family_ops.family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3456) proto_unregister(&tipc_proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3459) /* Caller should hold socket lock for the passed tipc socket. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3460) static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3461) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3462) u32 peer_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3463) u32 peer_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3464) struct nlattr *nest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3466) peer_node = tsk_peer_node(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3467) peer_port = tsk_peer_port(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3469) nest = nla_nest_start_noflag(skb, TIPC_NLA_SOCK_CON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3470) if (!nest)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3471) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3473) if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3474) goto msg_full;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3475) if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3476) goto msg_full;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3478) if (tsk->conn_type != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3479) if (nla_put_flag(skb, TIPC_NLA_CON_FLAG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3480) goto msg_full;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3481) if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3482) goto msg_full;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3483) if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3484) goto msg_full;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3486) nla_nest_end(skb, nest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3488) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3490) msg_full:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3491) nla_nest_cancel(skb, nest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3493) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3496) static int __tipc_nl_add_sk_info(struct sk_buff *skb, struct tipc_sock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3497) *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3499) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3500) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3502) if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3503) nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tipc_own_addr(net)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3504) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3506) if (tipc_sk_connected(sk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3507) if (__tipc_nl_add_sk_con(skb, tsk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3508) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3509) } else if (!list_empty(&tsk->publications)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3510) if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3511) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3512) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3513) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3514) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3516) /* Caller should hold socket lock for the passed tipc socket. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3517) static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3518) struct tipc_sock *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3519) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3520) struct nlattr *attrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3521) void *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3523) hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3524) &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3525) if (!hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3526) goto msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3528) attrs = nla_nest_start_noflag(skb, TIPC_NLA_SOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3529) if (!attrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3530) goto genlmsg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3532) if (__tipc_nl_add_sk_info(skb, tsk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3533) goto attr_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3535) nla_nest_end(skb, attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3536) genlmsg_end(skb, hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3538) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3540) attr_msg_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3541) nla_nest_cancel(skb, attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3542) genlmsg_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3543) genlmsg_cancel(skb, hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3544) msg_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3545) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3548) int tipc_nl_sk_walk(struct sk_buff *skb, struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3549) int (*skb_handler)(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3550) struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3551) struct tipc_sock *tsk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3552) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3553) struct rhashtable_iter *iter = (void *)cb->args[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3554) struct tipc_sock *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3555) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3557) rhashtable_walk_start(iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3558) while ((tsk = rhashtable_walk_next(iter)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3559) if (IS_ERR(tsk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3560) err = PTR_ERR(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3561) if (err == -EAGAIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3562) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3563) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3565) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3566) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3568) sock_hold(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3569) rhashtable_walk_stop(iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3570) lock_sock(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3571) err = skb_handler(skb, cb, tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3572) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3573) release_sock(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3574) sock_put(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3575) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3576) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3577) release_sock(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3578) rhashtable_walk_start(iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3579) sock_put(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3580) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3581) rhashtable_walk_stop(iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3582) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3583) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3584) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3585) EXPORT_SYMBOL(tipc_nl_sk_walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3587) int tipc_dump_start(struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3588) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3589) return __tipc_dump_start(cb, sock_net(cb->skb->sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3591) EXPORT_SYMBOL(tipc_dump_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3593) int __tipc_dump_start(struct netlink_callback *cb, struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3594) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3595) /* tipc_nl_name_table_dump() uses cb->args[0...3]. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3596) struct rhashtable_iter *iter = (void *)cb->args[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3597) struct tipc_net *tn = tipc_net(net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3599) if (!iter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3600) iter = kmalloc(sizeof(*iter), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3601) if (!iter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3602) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3604) cb->args[4] = (long)iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3607) rhashtable_walk_enter(&tn->sk_rht, iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3608) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3611) int tipc_dump_done(struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3612) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3613) struct rhashtable_iter *hti = (void *)cb->args[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3615) rhashtable_walk_exit(hti);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3616) kfree(hti);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3617) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3619) EXPORT_SYMBOL(tipc_dump_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3621) int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3622) struct tipc_sock *tsk, u32 sk_filter_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3623) u64 (*tipc_diag_gen_cookie)(struct sock *sk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3624) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3625) struct sock *sk = &tsk->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3626) struct nlattr *attrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3627) struct nlattr *stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3629) /*filter response w.r.t sk_state*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3630) if (!(sk_filter_state & (1 << sk->sk_state)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3631) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3633) attrs = nla_nest_start_noflag(skb, TIPC_NLA_SOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3634) if (!attrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3635) goto msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3637) if (__tipc_nl_add_sk_info(skb, tsk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3638) goto attr_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3640) if (nla_put_u32(skb, TIPC_NLA_SOCK_TYPE, (u32)sk->sk_type) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3641) nla_put_u32(skb, TIPC_NLA_SOCK_TIPC_STATE, (u32)sk->sk_state) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3642) nla_put_u32(skb, TIPC_NLA_SOCK_INO, sock_i_ino(sk)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3643) nla_put_u32(skb, TIPC_NLA_SOCK_UID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3644) from_kuid_munged(sk_user_ns(NETLINK_CB(cb->skb).sk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3645) sock_i_uid(sk))) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3646) nla_put_u64_64bit(skb, TIPC_NLA_SOCK_COOKIE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3647) tipc_diag_gen_cookie(sk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3648) TIPC_NLA_SOCK_PAD))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3649) goto attr_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3651) stat = nla_nest_start_noflag(skb, TIPC_NLA_SOCK_STAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3652) if (!stat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3653) goto attr_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3655) if (nla_put_u32(skb, TIPC_NLA_SOCK_STAT_RCVQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3656) skb_queue_len(&sk->sk_receive_queue)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3657) nla_put_u32(skb, TIPC_NLA_SOCK_STAT_SENDQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3658) skb_queue_len(&sk->sk_write_queue)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3659) nla_put_u32(skb, TIPC_NLA_SOCK_STAT_DROP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3660) atomic_read(&sk->sk_drops)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3661) goto stat_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3663) if (tsk->cong_link_cnt &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3664) nla_put_flag(skb, TIPC_NLA_SOCK_STAT_LINK_CONG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3665) goto stat_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3667) if (tsk_conn_cong(tsk) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3668) nla_put_flag(skb, TIPC_NLA_SOCK_STAT_CONN_CONG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3669) goto stat_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3671) nla_nest_end(skb, stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3673) if (tsk->group)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3674) if (tipc_group_fill_sock_diag(tsk->group, skb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3675) goto stat_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3677) nla_nest_end(skb, attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3679) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3681) stat_msg_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3682) nla_nest_cancel(skb, stat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3683) attr_msg_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3684) nla_nest_cancel(skb, attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3685) msg_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3686) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3688) EXPORT_SYMBOL(tipc_sk_fill_sock_diag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3690) int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3691) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3692) return tipc_nl_sk_walk(skb, cb, __tipc_nl_add_sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3695) /* Caller should hold socket lock for the passed tipc socket. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3696) static int __tipc_nl_add_sk_publ(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3697) struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3698) struct publication *publ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3699) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3700) void *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3701) struct nlattr *attrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3703) hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3704) &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3705) if (!hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3706) goto msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3708) attrs = nla_nest_start_noflag(skb, TIPC_NLA_PUBL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3709) if (!attrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3710) goto genlmsg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3712) if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3713) goto attr_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3714) if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3715) goto attr_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3716) if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3717) goto attr_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3718) if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3719) goto attr_msg_cancel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3721) nla_nest_end(skb, attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3722) genlmsg_end(skb, hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3724) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3726) attr_msg_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3727) nla_nest_cancel(skb, attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3728) genlmsg_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3729) genlmsg_cancel(skb, hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3730) msg_cancel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3731) return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3732) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3734) /* Caller should hold socket lock for the passed tipc socket. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3735) static int __tipc_nl_list_sk_publ(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3736) struct netlink_callback *cb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3737) struct tipc_sock *tsk, u32 *last_publ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3738) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3739) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3740) struct publication *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3742) if (*last_publ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3743) list_for_each_entry(p, &tsk->publications, binding_sock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3744) if (p->key == *last_publ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3745) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3746) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3747) if (list_entry_is_head(p, &tsk->publications, binding_sock)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3748) /* We never set seq or call nl_dump_check_consistent()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3749) * this means that setting prev_seq here will cause the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3750) * consistence check to fail in the netlink callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3751) * handler. Resulting in the last NLMSG_DONE message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3752) * having the NLM_F_DUMP_INTR flag set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3753) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3754) cb->prev_seq = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3755) *last_publ = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3756) return -EPIPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3757) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3758) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3759) p = list_first_entry(&tsk->publications, struct publication,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3760) binding_sock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3761) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3763) list_for_each_entry_from(p, &tsk->publications, binding_sock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3764) err = __tipc_nl_add_sk_publ(skb, cb, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3765) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3766) *last_publ = p->key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3767) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3769) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3770) *last_publ = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3772) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3773) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3775) int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3776) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3777) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3778) u32 tsk_portid = cb->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3779) u32 last_publ = cb->args[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3780) u32 done = cb->args[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3781) struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3782) struct tipc_sock *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3784) if (!tsk_portid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3785) struct nlattr **attrs = genl_dumpit_info(cb)->attrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3786) struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3788) if (!attrs[TIPC_NLA_SOCK])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3789) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3791) err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3792) attrs[TIPC_NLA_SOCK],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3793) tipc_nl_sock_policy, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3794) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3795) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3797) if (!sock[TIPC_NLA_SOCK_REF])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3798) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3800) tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3801) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3803) if (done)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3804) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3806) tsk = tipc_sk_lookup(net, tsk_portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3807) if (!tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3808) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3810) lock_sock(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3811) err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3812) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3813) done = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3814) release_sock(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3815) sock_put(&tsk->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3817) cb->args[0] = tsk_portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3818) cb->args[1] = last_publ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3819) cb->args[2] = done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3821) return skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3822) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3824) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3825) * tipc_sk_filtering - check if a socket should be traced
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3826) * @sk: the socket to be examined
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3827) * @sysctl_tipc_sk_filter[]: the socket tuple for filtering,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3828) * (portid, sock type, name type, name lower, name upper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3829) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3830) * Returns true if the socket meets the socket tuple data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3831) * (value 0 = 'any') or when there is no tuple set (all = 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3832) * otherwise false
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3833) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3834) bool tipc_sk_filtering(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3835) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3836) struct tipc_sock *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3837) struct publication *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3838) u32 _port, _sktype, _type, _lower, _upper;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3839) u32 type = 0, lower = 0, upper = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3841) if (!sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3842) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3844) tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3846) _port = sysctl_tipc_sk_filter[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3847) _sktype = sysctl_tipc_sk_filter[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3848) _type = sysctl_tipc_sk_filter[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3849) _lower = sysctl_tipc_sk_filter[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3850) _upper = sysctl_tipc_sk_filter[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3852) if (!_port && !_sktype && !_type && !_lower && !_upper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3853) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3855) if (_port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3856) return (_port == tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3858) if (_sktype && _sktype != sk->sk_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3859) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3861) if (tsk->published) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3862) p = list_first_entry_or_null(&tsk->publications,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3863) struct publication, binding_sock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3864) if (p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3865) type = p->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3866) lower = p->lower;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3867) upper = p->upper;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3868) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3871) if (!tipc_sk_type_connectionless(sk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3872) type = tsk->conn_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3873) lower = tsk->conn_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3874) upper = tsk->conn_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3875) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3877) if ((_type && _type != type) || (_lower && _lower != lower) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3878) (_upper && _upper != upper))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3879) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3881) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3882) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3884) u32 tipc_sock_get_portid(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3885) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3886) return (sk) ? (tipc_sk(sk))->portid : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3889) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3890) * tipc_sk_overlimit1 - check if socket rx queue is about to be overloaded,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3891) * both the rcv and backlog queues are considered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3892) * @sk: tipc sk to be checked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3893) * @skb: tipc msg to be checked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3894) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3895) * Returns true if the socket rx queue allocation is > 90%, otherwise false
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3896) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3898) bool tipc_sk_overlimit1(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3899) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3900) atomic_t *dcnt = &tipc_sk(sk)->dupl_rcvcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3901) unsigned int lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3902) unsigned int qsize = sk->sk_backlog.len + sk_rmem_alloc_get(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3903)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3904) return (qsize > lim * 90 / 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3905) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3907) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3908) * tipc_sk_overlimit2 - check if socket rx queue is about to be overloaded,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3909) * only the rcv queue is considered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3910) * @sk: tipc sk to be checked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3911) * @skb: tipc msg to be checked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3912) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3913) * Returns true if the socket rx queue allocation is > 90%, otherwise false
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3914) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3916) bool tipc_sk_overlimit2(struct sock *sk, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3917) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3918) unsigned int lim = rcvbuf_limit(sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3919) unsigned int qsize = sk_rmem_alloc_get(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3921) return (qsize > lim * 90 / 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3924) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3925) * tipc_sk_dump - dump TIPC socket
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3926) * @sk: tipc sk to be dumped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3927) * @dqueues: bitmask to decide if any socket queue to be dumped?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3928) * - TIPC_DUMP_NONE: don't dump socket queues
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3929) * - TIPC_DUMP_SK_SNDQ: dump socket send queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3930) * - TIPC_DUMP_SK_RCVQ: dump socket rcv queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3931) * - TIPC_DUMP_SK_BKLGQ: dump socket backlog queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3932) * - TIPC_DUMP_ALL: dump all the socket queues above
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3933) * @buf: returned buffer of dump data in format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3934) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3935) int tipc_sk_dump(struct sock *sk, u16 dqueues, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3936) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3937) int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3938) size_t sz = (dqueues) ? SK_LMAX : SK_LMIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3939) struct tipc_sock *tsk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3940) struct publication *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3941) bool tsk_connected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3943) if (!sk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3944) i += scnprintf(buf, sz, "sk data: (null)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3945) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3946) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3948) tsk = tipc_sk(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3949) tsk_connected = !tipc_sk_type_connectionless(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3951) i += scnprintf(buf, sz, "sk data: %u", sk->sk_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3952) i += scnprintf(buf + i, sz - i, " %d", sk->sk_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3953) i += scnprintf(buf + i, sz - i, " %x", tsk_own_node(tsk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3954) i += scnprintf(buf + i, sz - i, " %u", tsk->portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3955) i += scnprintf(buf + i, sz - i, " | %u", tsk_connected);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3956) if (tsk_connected) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3957) i += scnprintf(buf + i, sz - i, " %x", tsk_peer_node(tsk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3958) i += scnprintf(buf + i, sz - i, " %u", tsk_peer_port(tsk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3959) i += scnprintf(buf + i, sz - i, " %u", tsk->conn_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3960) i += scnprintf(buf + i, sz - i, " %u", tsk->conn_instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3961) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3962) i += scnprintf(buf + i, sz - i, " | %u", tsk->published);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3963) if (tsk->published) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3964) p = list_first_entry_or_null(&tsk->publications,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3965) struct publication, binding_sock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3966) i += scnprintf(buf + i, sz - i, " %u", (p) ? p->type : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3967) i += scnprintf(buf + i, sz - i, " %u", (p) ? p->lower : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3968) i += scnprintf(buf + i, sz - i, " %u", (p) ? p->upper : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3969) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3970) i += scnprintf(buf + i, sz - i, " | %u", tsk->snd_win);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3971) i += scnprintf(buf + i, sz - i, " %u", tsk->rcv_win);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3972) i += scnprintf(buf + i, sz - i, " %u", tsk->max_pkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3973) i += scnprintf(buf + i, sz - i, " %x", tsk->peer_caps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3974) i += scnprintf(buf + i, sz - i, " %u", tsk->cong_link_cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3975) i += scnprintf(buf + i, sz - i, " %u", tsk->snt_unacked);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3976) i += scnprintf(buf + i, sz - i, " %u", tsk->rcv_unacked);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3977) i += scnprintf(buf + i, sz - i, " %u", atomic_read(&tsk->dupl_rcvcnt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3978) i += scnprintf(buf + i, sz - i, " %u", sk->sk_shutdown);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3979) i += scnprintf(buf + i, sz - i, " | %d", sk_wmem_alloc_get(sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3980) i += scnprintf(buf + i, sz - i, " %d", sk->sk_sndbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3981) i += scnprintf(buf + i, sz - i, " | %d", sk_rmem_alloc_get(sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3982) i += scnprintf(buf + i, sz - i, " %d", sk->sk_rcvbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3983) i += scnprintf(buf + i, sz - i, " | %d\n", READ_ONCE(sk->sk_backlog.len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3985) if (dqueues & TIPC_DUMP_SK_SNDQ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3986) i += scnprintf(buf + i, sz - i, "sk_write_queue: ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3987) i += tipc_list_dump(&sk->sk_write_queue, false, buf + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3988) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3990) if (dqueues & TIPC_DUMP_SK_RCVQ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3991) i += scnprintf(buf + i, sz - i, "sk_receive_queue: ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3992) i += tipc_list_dump(&sk->sk_receive_queue, false, buf + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3993) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3995) if (dqueues & TIPC_DUMP_SK_BKLGQ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3996) i += scnprintf(buf + i, sz - i, "sk_backlog:\n head ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3997) i += tipc_skb_dump(sk->sk_backlog.head, false, buf + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3998) if (sk->sk_backlog.tail != sk->sk_backlog.head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3999) i += scnprintf(buf + i, sz - i, " tail ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4000) i += tipc_skb_dump(sk->sk_backlog.tail, false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4001) buf + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4002) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4003) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4005) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4006) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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