2 * net/tipc/socket.c: TIPC socket API
4 * Copyright (c) 2001-2007, 2012-2017, Ericsson AB
5 * Copyright (c) 2004-2008, 2010-2013, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
37 #include <linux/rhashtable.h>
38 #include <linux/sched/signal.h>
41 #include "name_table.h"
44 #include "name_distr.h"
51 #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
52 #define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */
53 #define TIPC_FWD_MSG 1
54 #define TIPC_MAX_PORT 0xffffffff
55 #define TIPC_MIN_PORT 1
56 #define TIPC_ACK_RATE 4 /* ACK at 1/4 of of rcv window size */
59 TIPC_LISTEN = TCP_LISTEN,
60 TIPC_ESTABLISHED = TCP_ESTABLISHED,
61 TIPC_OPEN = TCP_CLOSE,
62 TIPC_DISCONNECTING = TCP_CLOSE_WAIT,
63 TIPC_CONNECTING = TCP_SYN_SENT,
66 struct sockaddr_pair {
67 struct sockaddr_tipc sock;
68 struct sockaddr_tipc member;
72 * struct tipc_sock - TIPC socket structure
73 * @sk: socket - interacts with 'port' and with user via the socket API
74 * @conn_type: TIPC type used when connection was established
75 * @conn_instance: TIPC instance used when connection was established
76 * @published: non-zero if port has one or more associated names
77 * @max_pkt: maximum packet size "hint" used when building messages sent by port
78 * @portid: unique port identity in TIPC socket hash table
79 * @phdr: preformatted message header used when sending messages
80 * #cong_links: list of congested links
81 * @publications: list of publications for port
82 * @blocking_link: address of the congested link we are currently sleeping on
83 * @pub_count: total # of publications port has made during its lifetime
84 * @conn_timeout: the time we can wait for an unresponded setup request
85 * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue
86 * @cong_link_cnt: number of congested links
87 * @snt_unacked: # messages sent by socket, and not yet acked by peer
88 * @rcv_unacked: # messages read by user, but not yet acked back to peer
89 * @peer: 'connected' peer for dgram/rdm
90 * @node: hash table node
91 * @mc_method: cookie for use between socket and broadcast layer
92 * @rcu: rcu struct for tipc_sock
101 struct tipc_msg phdr;
102 struct list_head cong_links;
103 struct list_head publications;
105 atomic_t dupl_rcvcnt;
114 struct sockaddr_tipc peer;
115 struct rhash_head node;
116 struct tipc_mc_method mc_method;
118 struct tipc_group *group;
122 static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb);
123 static void tipc_data_ready(struct sock *sk);
124 static void tipc_write_space(struct sock *sk);
125 static void tipc_sock_destruct(struct sock *sk);
126 static int tipc_release(struct socket *sock);
127 static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags,
129 static void tipc_sk_timeout(struct timer_list *t);
130 static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
131 struct tipc_name_seq const *seq);
132 static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
133 struct tipc_name_seq const *seq);
134 static int tipc_sk_leave(struct tipc_sock *tsk);
135 static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid);
136 static int tipc_sk_insert(struct tipc_sock *tsk);
137 static void tipc_sk_remove(struct tipc_sock *tsk);
138 static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz);
139 static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);
141 static const struct proto_ops packet_ops;
142 static const struct proto_ops stream_ops;
143 static const struct proto_ops msg_ops;
144 static struct proto tipc_proto;
145 static const struct rhashtable_params tsk_rht_params;
147 static u32 tsk_own_node(struct tipc_sock *tsk)
149 return msg_prevnode(&tsk->phdr);
152 static u32 tsk_peer_node(struct tipc_sock *tsk)
154 return msg_destnode(&tsk->phdr);
157 static u32 tsk_peer_port(struct tipc_sock *tsk)
159 return msg_destport(&tsk->phdr);
162 static bool tsk_unreliable(struct tipc_sock *tsk)
164 return msg_src_droppable(&tsk->phdr) != 0;
167 static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable)
169 msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0);
172 static bool tsk_unreturnable(struct tipc_sock *tsk)
174 return msg_dest_droppable(&tsk->phdr) != 0;
177 static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable)
179 msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0);
182 static int tsk_importance(struct tipc_sock *tsk)
184 return msg_importance(&tsk->phdr);
187 static int tsk_set_importance(struct tipc_sock *tsk, int imp)
189 if (imp > TIPC_CRITICAL_IMPORTANCE)
191 msg_set_importance(&tsk->phdr, (u32)imp);
195 static struct tipc_sock *tipc_sk(const struct sock *sk)
197 return container_of(sk, struct tipc_sock, sk);
200 static bool tsk_conn_cong(struct tipc_sock *tsk)
202 return tsk->snt_unacked > tsk->snd_win;
205 static u16 tsk_blocks(int len)
207 return ((len / FLOWCTL_BLK_SZ) + 1);
210 /* tsk_blocks(): translate a buffer size in bytes to number of
211 * advertisable blocks, taking into account the ratio truesize(len)/len
212 * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ
214 static u16 tsk_adv_blocks(int len)
216 return len / FLOWCTL_BLK_SZ / 4;
219 /* tsk_inc(): increment counter for sent or received data
220 * - If block based flow control is not supported by peer we
221 * fall back to message based ditto, incrementing the counter
223 static u16 tsk_inc(struct tipc_sock *tsk, int msglen)
225 if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL))
226 return ((msglen / FLOWCTL_BLK_SZ) + 1);
231 * tsk_advance_rx_queue - discard first buffer in socket receive queue
233 * Caller must hold socket lock
235 static void tsk_advance_rx_queue(struct sock *sk)
237 trace_tipc_sk_advance_rx(sk, NULL, TIPC_DUMP_SK_RCVQ, " ");
238 kfree_skb(__skb_dequeue(&sk->sk_receive_queue));
241 /* tipc_sk_respond() : send response message back to sender
243 static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err)
247 u32 onode = tipc_own_addr(sock_net(sk));
249 if (!tipc_msg_reverse(onode, &skb, err))
252 trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_NONE, "@sk_respond!");
253 dnode = msg_destnode(buf_msg(skb));
254 selector = msg_origport(buf_msg(skb));
255 tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector);
259 * tsk_rej_rx_queue - reject all buffers in socket receive queue
261 * Caller must hold socket lock
263 static void tsk_rej_rx_queue(struct sock *sk)
267 while ((skb = __skb_dequeue(&sk->sk_receive_queue)))
268 tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT);
271 static bool tipc_sk_connected(struct sock *sk)
273 return sk->sk_state == TIPC_ESTABLISHED;
276 /* tipc_sk_type_connectionless - check if the socket is datagram socket
279 * Returns true if connection less, false otherwise
281 static bool tipc_sk_type_connectionless(struct sock *sk)
283 return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM;
286 /* tsk_peer_msg - verify if message was sent by connected port's peer
288 * Handles cases where the node's network address has changed from
289 * the default of <0.0.0> to its configured setting.
291 static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg)
293 struct sock *sk = &tsk->sk;
294 u32 self = tipc_own_addr(sock_net(sk));
295 u32 peer_port = tsk_peer_port(tsk);
296 u32 orig_node, peer_node;
298 if (unlikely(!tipc_sk_connected(sk)))
301 if (unlikely(msg_origport(msg) != peer_port))
304 orig_node = msg_orignode(msg);
305 peer_node = tsk_peer_node(tsk);
307 if (likely(orig_node == peer_node))
310 if (!orig_node && peer_node == self)
313 if (!peer_node && orig_node == self)
319 /* tipc_set_sk_state - set the sk_state of the socket
322 * Caller must hold socket lock
324 * Returns 0 on success, errno otherwise
326 static int tipc_set_sk_state(struct sock *sk, int state)
328 int oldsk_state = sk->sk_state;
336 case TIPC_CONNECTING:
337 if (oldsk_state == TIPC_OPEN)
340 case TIPC_ESTABLISHED:
341 if (oldsk_state == TIPC_CONNECTING ||
342 oldsk_state == TIPC_OPEN)
345 case TIPC_DISCONNECTING:
346 if (oldsk_state == TIPC_CONNECTING ||
347 oldsk_state == TIPC_ESTABLISHED)
353 sk->sk_state = state;
358 static int tipc_sk_sock_err(struct socket *sock, long *timeout)
360 struct sock *sk = sock->sk;
361 int err = sock_error(sk);
362 int typ = sock->type;
366 if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) {
367 if (sk->sk_state == TIPC_DISCONNECTING)
369 else if (!tipc_sk_connected(sk))
374 if (signal_pending(current))
375 return sock_intr_errno(*timeout);
380 #define tipc_wait_for_cond(sock_, timeo_, condition_) \
385 while ((rc_ = !(condition_))) { \
386 DEFINE_WAIT_FUNC(wait_, woken_wake_function); \
388 rc_ = tipc_sk_sock_err((sock_), timeo_); \
391 add_wait_queue(sk_sleep(sk_), &wait_); \
393 *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \
394 sched_annotate_sleep(); \
396 remove_wait_queue(sk_sleep(sk_), &wait_); \
402 * tipc_sk_create - create a TIPC socket
403 * @net: network namespace (must be default network)
404 * @sock: pre-allocated socket structure
405 * @protocol: protocol indicator (must be 0)
406 * @kern: caused by kernel or by userspace?
408 * This routine creates additional data structures used by the TIPC socket,
409 * initializes them, and links them together.
411 * Returns 0 on success, errno otherwise
413 static int tipc_sk_create(struct net *net, struct socket *sock,
414 int protocol, int kern)
416 const struct proto_ops *ops;
418 struct tipc_sock *tsk;
419 struct tipc_msg *msg;
421 /* Validate arguments */
422 if (unlikely(protocol != 0))
423 return -EPROTONOSUPPORT;
425 switch (sock->type) {
440 /* Allocate socket's protocol area */
441 sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern);
446 tsk->max_pkt = MAX_PKT_DEFAULT;
447 INIT_LIST_HEAD(&tsk->publications);
448 INIT_LIST_HEAD(&tsk->cong_links);
451 /* Finish initializing socket data structures */
453 sock_init_data(sock, sk);
454 tipc_set_sk_state(sk, TIPC_OPEN);
455 if (tipc_sk_insert(tsk)) {
456 pr_warn("Socket create failed; port number exhausted\n");
460 /* Ensure tsk is visible before we read own_addr. */
463 tipc_msg_init(tipc_own_addr(net), msg, TIPC_LOW_IMPORTANCE,
464 TIPC_NAMED_MSG, NAMED_H_SIZE, 0);
466 msg_set_origport(msg, tsk->portid);
467 timer_setup(&sk->sk_timer, tipc_sk_timeout, 0);
469 sk->sk_backlog_rcv = tipc_sk_backlog_rcv;
470 sk->sk_rcvbuf = sysctl_tipc_rmem[1];
471 sk->sk_data_ready = tipc_data_ready;
472 sk->sk_write_space = tipc_write_space;
473 sk->sk_destruct = tipc_sock_destruct;
474 tsk->conn_timeout = CONN_TIMEOUT_DEFAULT;
475 tsk->group_is_open = true;
476 atomic_set(&tsk->dupl_rcvcnt, 0);
478 /* Start out with safe limits until we receive an advertised window */
479 tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN);
480 tsk->rcv_win = tsk->snd_win;
482 if (tipc_sk_type_connectionless(sk)) {
483 tsk_set_unreturnable(tsk, true);
484 if (sock->type == SOCK_DGRAM)
485 tsk_set_unreliable(tsk, true);
488 trace_tipc_sk_create(sk, NULL, TIPC_DUMP_NONE, " ");
492 static void tipc_sk_callback(struct rcu_head *head)
494 struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu);
499 /* Caller should hold socket lock for the socket. */
500 static void __tipc_shutdown(struct socket *sock, int error)
502 struct sock *sk = sock->sk;
503 struct tipc_sock *tsk = tipc_sk(sk);
504 struct net *net = sock_net(sk);
505 long timeout = CONN_TIMEOUT_DEFAULT;
506 u32 dnode = tsk_peer_node(tsk);
509 /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */
510 tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt &&
511 !tsk_conn_cong(tsk)));
513 /* Remove any pending SYN message */
514 __skb_queue_purge(&sk->sk_write_queue);
516 /* Reject all unreceived messages, except on an active connection
517 * (which disconnects locally & sends a 'FIN+' to peer).
519 while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) {
520 if (TIPC_SKB_CB(skb)->bytes_read) {
524 if (!tipc_sk_type_connectionless(sk) &&
525 sk->sk_state != TIPC_DISCONNECTING) {
526 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
527 tipc_node_remove_conn(net, dnode, tsk->portid);
529 tipc_sk_respond(sk, skb, error);
532 if (tipc_sk_type_connectionless(sk))
535 if (sk->sk_state != TIPC_DISCONNECTING) {
536 skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
537 TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode,
538 tsk_own_node(tsk), tsk_peer_port(tsk),
541 tipc_node_xmit_skb(net, skb, dnode, tsk->portid);
542 tipc_node_remove_conn(net, dnode, tsk->portid);
543 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
548 * tipc_release - destroy a TIPC socket
549 * @sock: socket to destroy
551 * This routine cleans up any messages that are still queued on the socket.
552 * For DGRAM and RDM socket types, all queued messages are rejected.
553 * For SEQPACKET and STREAM socket types, the first message is rejected
554 * and any others are discarded. (If the first message on a STREAM socket
555 * is partially-read, it is discarded and the next one is rejected instead.)
557 * NOTE: Rejected messages are not necessarily returned to the sender! They
558 * are returned or discarded according to the "destination droppable" setting
559 * specified for the message by the sender.
561 * Returns 0 on success, errno otherwise
563 static int tipc_release(struct socket *sock)
565 struct sock *sk = sock->sk;
566 struct tipc_sock *tsk;
569 * Exit if socket isn't fully initialized (occurs when a failed accept()
570 * releases a pre-allocated child socket that was never used)
578 trace_tipc_sk_release(sk, NULL, TIPC_DUMP_ALL, " ");
579 __tipc_shutdown(sock, TIPC_ERR_NO_PORT);
580 sk->sk_shutdown = SHUTDOWN_MASK;
582 tipc_sk_withdraw(tsk, 0, NULL);
583 sk_stop_timer(sk, &sk->sk_timer);
587 /* Reject any messages that accumulated in backlog queue */
589 tipc_dest_list_purge(&tsk->cong_links);
590 tsk->cong_link_cnt = 0;
591 call_rcu(&tsk->rcu, tipc_sk_callback);
598 * tipc_bind - associate or disassocate TIPC name(s) with a socket
599 * @sock: socket structure
600 * @uaddr: socket address describing name(s) and desired operation
601 * @uaddr_len: size of socket address data structure
603 * Name and name sequence binding is indicated using a positive scope value;
604 * a negative scope value unbinds the specified name. Specifying no name
605 * (i.e. a socket address length of 0) unbinds all names from the socket.
607 * Returns 0 on success, errno otherwise
609 * NOTE: This routine doesn't need to take the socket lock since it doesn't
610 * access any non-constant socket information.
612 static int tipc_bind(struct socket *sock, struct sockaddr *uaddr,
615 struct sock *sk = sock->sk;
616 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
617 struct tipc_sock *tsk = tipc_sk(sk);
621 if (unlikely(!uaddr_len)) {
622 res = tipc_sk_withdraw(tsk, 0, NULL);
629 if (uaddr_len < sizeof(struct sockaddr_tipc)) {
633 if (addr->family != AF_TIPC) {
638 if (addr->addrtype == TIPC_ADDR_NAME)
639 addr->addr.nameseq.upper = addr->addr.nameseq.lower;
640 else if (addr->addrtype != TIPC_ADDR_NAMESEQ) {
645 if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) &&
646 (addr->addr.nameseq.type != TIPC_TOP_SRV) &&
647 (addr->addr.nameseq.type != TIPC_CFG_SRV)) {
652 res = (addr->scope >= 0) ?
653 tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) :
654 tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq);
661 * tipc_getname - get port ID of socket or peer socket
662 * @sock: socket structure
663 * @uaddr: area for returned socket address
664 * @uaddr_len: area for returned length of socket address
665 * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID
667 * Returns 0 on success, errno otherwise
669 * NOTE: This routine doesn't need to take the socket lock since it only
670 * accesses socket information that is unchanging (or which changes in
671 * a completely predictable manner).
673 static int tipc_getname(struct socket *sock, struct sockaddr *uaddr,
676 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
677 struct sock *sk = sock->sk;
678 struct tipc_sock *tsk = tipc_sk(sk);
680 memset(addr, 0, sizeof(*addr));
682 if ((!tipc_sk_connected(sk)) &&
683 ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING)))
685 addr->addr.id.ref = tsk_peer_port(tsk);
686 addr->addr.id.node = tsk_peer_node(tsk);
688 addr->addr.id.ref = tsk->portid;
689 addr->addr.id.node = tipc_own_addr(sock_net(sk));
692 addr->addrtype = TIPC_ADDR_ID;
693 addr->family = AF_TIPC;
695 addr->addr.name.domain = 0;
697 return sizeof(*addr);
701 * tipc_poll - read and possibly block on pollmask
702 * @file: file structure associated with the socket
703 * @sock: socket for which to calculate the poll bits
706 * Returns pollmask value
709 * It appears that the usual socket locking mechanisms are not useful here
710 * since the pollmask info is potentially out-of-date the moment this routine
711 * exits. TCP and other protocols seem to rely on higher level poll routines
712 * to handle any preventable race conditions, so TIPC will do the same ...
714 * IMPORTANT: The fact that a read or write operation is indicated does NOT
715 * imply that the operation will succeed, merely that it should be performed
716 * and will not block.
718 static __poll_t tipc_poll(struct file *file, struct socket *sock,
721 struct sock *sk = sock->sk;
722 struct tipc_sock *tsk = tipc_sk(sk);
723 __poll_t revents = 0;
725 sock_poll_wait(file, sock, wait);
726 trace_tipc_sk_poll(sk, NULL, TIPC_DUMP_ALL, " ");
728 if (sk->sk_shutdown & RCV_SHUTDOWN)
729 revents |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
730 if (sk->sk_shutdown == SHUTDOWN_MASK)
733 switch (sk->sk_state) {
734 case TIPC_ESTABLISHED:
735 case TIPC_CONNECTING:
736 if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk))
740 if (!skb_queue_empty(&sk->sk_receive_queue))
741 revents |= EPOLLIN | EPOLLRDNORM;
744 if (tsk->group_is_open && !tsk->cong_link_cnt)
746 if (!tipc_sk_type_connectionless(sk))
748 if (skb_queue_empty(&sk->sk_receive_queue))
750 revents |= EPOLLIN | EPOLLRDNORM;
752 case TIPC_DISCONNECTING:
753 revents = EPOLLIN | EPOLLRDNORM | EPOLLHUP;
760 * tipc_sendmcast - send multicast message
761 * @sock: socket structure
762 * @seq: destination address
763 * @msg: message to send
764 * @dlen: length of data to send
765 * @timeout: timeout to wait for wakeup
767 * Called from function tipc_sendmsg(), which has done all sanity checks
768 * Returns the number of bytes sent on success, or errno
770 static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
771 struct msghdr *msg, size_t dlen, long timeout)
773 struct sock *sk = sock->sk;
774 struct tipc_sock *tsk = tipc_sk(sk);
775 struct tipc_msg *hdr = &tsk->phdr;
776 struct net *net = sock_net(sk);
777 int mtu = tipc_bcast_get_mtu(net);
778 struct tipc_mc_method *method = &tsk->mc_method;
779 struct sk_buff_head pkts;
780 struct tipc_nlist dsts;
786 /* Block or return if any destination link is congested */
787 rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt);
791 /* Lookup destination nodes */
792 tipc_nlist_init(&dsts, tipc_own_addr(net));
793 tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower,
795 if (!dsts.local && !dsts.remote)
796 return -EHOSTUNREACH;
798 /* Build message header */
799 msg_set_type(hdr, TIPC_MCAST_MSG);
800 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
801 msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE);
802 msg_set_destport(hdr, 0);
803 msg_set_destnode(hdr, 0);
804 msg_set_nametype(hdr, seq->type);
805 msg_set_namelower(hdr, seq->lower);
806 msg_set_nameupper(hdr, seq->upper);
808 /* Build message as chain of buffers */
809 skb_queue_head_init(&pkts);
810 rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts);
812 /* Send message if build was successful */
813 if (unlikely(rc == dlen)) {
814 trace_tipc_sk_sendmcast(sk, skb_peek(&pkts),
815 TIPC_DUMP_SK_SNDQ, " ");
816 rc = tipc_mcast_xmit(net, &pkts, method, &dsts,
817 &tsk->cong_link_cnt);
820 tipc_nlist_purge(&dsts);
822 return rc ? rc : dlen;
826 * tipc_send_group_msg - send a message to a member in the group
827 * @net: network namespace
828 * @m: message to send
830 * @dnode: destination node
831 * @dport: destination port
832 * @dlen: total length of message data
834 static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk,
835 struct msghdr *m, struct tipc_member *mb,
836 u32 dnode, u32 dport, int dlen)
838 u16 bc_snd_nxt = tipc_group_bc_snd_nxt(tsk->group);
839 struct tipc_mc_method *method = &tsk->mc_method;
840 int blks = tsk_blocks(GROUP_H_SIZE + dlen);
841 struct tipc_msg *hdr = &tsk->phdr;
842 struct sk_buff_head pkts;
845 /* Complete message header */
846 msg_set_type(hdr, TIPC_GRP_UCAST_MSG);
847 msg_set_hdr_sz(hdr, GROUP_H_SIZE);
848 msg_set_destport(hdr, dport);
849 msg_set_destnode(hdr, dnode);
850 msg_set_grp_bc_seqno(hdr, bc_snd_nxt);
852 /* Build message as chain of buffers */
853 skb_queue_head_init(&pkts);
854 mtu = tipc_node_get_mtu(net, dnode, tsk->portid);
855 rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
856 if (unlikely(rc != dlen))
860 rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
861 if (unlikely(rc == -ELINKCONG)) {
862 tipc_dest_push(&tsk->cong_links, dnode, 0);
863 tsk->cong_link_cnt++;
866 /* Update send window */
867 tipc_group_update_member(mb, blks);
869 /* A broadcast sent within next EXPIRE period must follow same path */
870 method->rcast = true;
871 method->mandatory = true;
876 * tipc_send_group_unicast - send message to a member in the group
877 * @sock: socket structure
878 * @m: message to send
879 * @dlen: total length of message data
880 * @timeout: timeout to wait for wakeup
882 * Called from function tipc_sendmsg(), which has done all sanity checks
883 * Returns the number of bytes sent on success, or errno
885 static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m,
886 int dlen, long timeout)
888 struct sock *sk = sock->sk;
889 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
890 int blks = tsk_blocks(GROUP_H_SIZE + dlen);
891 struct tipc_sock *tsk = tipc_sk(sk);
892 struct net *net = sock_net(sk);
893 struct tipc_member *mb = NULL;
897 node = dest->addr.id.node;
898 port = dest->addr.id.ref;
900 return -EHOSTUNREACH;
902 /* Block or return if destination link or member is congested */
903 rc = tipc_wait_for_cond(sock, &timeout,
904 !tipc_dest_find(&tsk->cong_links, node, 0) &&
906 !tipc_group_cong(tsk->group, node, port, blks,
912 return -EHOSTUNREACH;
914 rc = tipc_send_group_msg(net, tsk, m, mb, node, port, dlen);
916 return rc ? rc : dlen;
920 * tipc_send_group_anycast - send message to any member with given identity
921 * @sock: socket structure
922 * @m: message to send
923 * @dlen: total length of message data
924 * @timeout: timeout to wait for wakeup
926 * Called from function tipc_sendmsg(), which has done all sanity checks
927 * Returns the number of bytes sent on success, or errno
929 static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m,
930 int dlen, long timeout)
932 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
933 struct sock *sk = sock->sk;
934 struct tipc_sock *tsk = tipc_sk(sk);
935 struct list_head *cong_links = &tsk->cong_links;
936 int blks = tsk_blocks(GROUP_H_SIZE + dlen);
937 struct tipc_msg *hdr = &tsk->phdr;
938 struct tipc_member *first = NULL;
939 struct tipc_member *mbr = NULL;
940 struct net *net = sock_net(sk);
941 u32 node, port, exclude;
942 struct list_head dsts;
943 u32 type, inst, scope;
948 INIT_LIST_HEAD(&dsts);
950 type = msg_nametype(hdr);
951 inst = dest->addr.name.name.instance;
952 scope = msg_lookup_scope(hdr);
954 while (++lookups < 4) {
955 exclude = tipc_group_exclude(tsk->group);
959 /* Look for a non-congested destination member, if any */
961 if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts,
962 &dstcnt, exclude, false))
963 return -EHOSTUNREACH;
964 tipc_dest_pop(&dsts, &node, &port);
965 cong = tipc_group_cong(tsk->group, node, port, blks,
975 /* Start over if destination was not in member list */
979 if (likely(!cong && !tipc_dest_find(cong_links, node, 0)))
982 /* Block or return if destination link or member is congested */
983 rc = tipc_wait_for_cond(sock, &timeout,
984 !tipc_dest_find(cong_links, node, 0) &&
986 !tipc_group_cong(tsk->group, node, port,
991 /* Send, unless destination disappeared while waiting */
996 if (unlikely(lookups >= 4))
997 return -EHOSTUNREACH;
999 rc = tipc_send_group_msg(net, tsk, m, mbr, node, port, dlen);
1001 return rc ? rc : dlen;
1005 * tipc_send_group_bcast - send message to all members in communication group
1006 * @sk: socket structure
1007 * @m: message to send
1008 * @dlen: total length of message data
1009 * @timeout: timeout to wait for wakeup
1011 * Called from function tipc_sendmsg(), which has done all sanity checks
1012 * Returns the number of bytes sent on success, or errno
1014 static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m,
1015 int dlen, long timeout)
1017 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
1018 struct sock *sk = sock->sk;
1019 struct net *net = sock_net(sk);
1020 struct tipc_sock *tsk = tipc_sk(sk);
1021 struct tipc_nlist *dsts;
1022 struct tipc_mc_method *method = &tsk->mc_method;
1023 bool ack = method->mandatory && method->rcast;
1024 int blks = tsk_blocks(MCAST_H_SIZE + dlen);
1025 struct tipc_msg *hdr = &tsk->phdr;
1026 int mtu = tipc_bcast_get_mtu(net);
1027 struct sk_buff_head pkts;
1028 int rc = -EHOSTUNREACH;
1030 /* Block or return if any destination link or member is congested */
1031 rc = tipc_wait_for_cond(sock, &timeout,
1032 !tsk->cong_link_cnt && tsk->group &&
1033 !tipc_group_bc_cong(tsk->group, blks));
1037 dsts = tipc_group_dests(tsk->group);
1038 if (!dsts->local && !dsts->remote)
1039 return -EHOSTUNREACH;
1041 /* Complete message header */
1043 msg_set_type(hdr, TIPC_GRP_MCAST_MSG);
1044 msg_set_nameinst(hdr, dest->addr.name.name.instance);
1046 msg_set_type(hdr, TIPC_GRP_BCAST_MSG);
1047 msg_set_nameinst(hdr, 0);
1049 msg_set_hdr_sz(hdr, GROUP_H_SIZE);
1050 msg_set_destport(hdr, 0);
1051 msg_set_destnode(hdr, 0);
1052 msg_set_grp_bc_seqno(hdr, tipc_group_bc_snd_nxt(tsk->group));
1054 /* Avoid getting stuck with repeated forced replicasts */
1055 msg_set_grp_bc_ack_req(hdr, ack);
1057 /* Build message as chain of buffers */
1058 skb_queue_head_init(&pkts);
1059 rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
1060 if (unlikely(rc != dlen))
1064 rc = tipc_mcast_xmit(net, &pkts, method, dsts, &tsk->cong_link_cnt);
1068 /* Update broadcast sequence number and send windows */
1069 tipc_group_update_bc_members(tsk->group, blks, ack);
1071 /* Broadcast link is now free to choose method for next broadcast */
1072 method->mandatory = false;
1073 method->expires = jiffies;
1079 * tipc_send_group_mcast - send message to all members with given identity
1080 * @sock: socket structure
1081 * @m: message to send
1082 * @dlen: total length of message data
1083 * @timeout: timeout to wait for wakeup
1085 * Called from function tipc_sendmsg(), which has done all sanity checks
1086 * Returns the number of bytes sent on success, or errno
1088 static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m,
1089 int dlen, long timeout)
1091 struct sock *sk = sock->sk;
1092 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
1093 struct tipc_sock *tsk = tipc_sk(sk);
1094 struct tipc_group *grp = tsk->group;
1095 struct tipc_msg *hdr = &tsk->phdr;
1096 struct net *net = sock_net(sk);
1097 u32 type, inst, scope, exclude;
1098 struct list_head dsts;
1101 INIT_LIST_HEAD(&dsts);
1103 type = msg_nametype(hdr);
1104 inst = dest->addr.name.name.instance;
1105 scope = msg_lookup_scope(hdr);
1106 exclude = tipc_group_exclude(grp);
1108 if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts,
1109 &dstcnt, exclude, true))
1110 return -EHOSTUNREACH;
1113 tipc_dest_pop(&dsts, &dest->addr.id.node, &dest->addr.id.ref);
1114 return tipc_send_group_unicast(sock, m, dlen, timeout);
1117 tipc_dest_list_purge(&dsts);
1118 return tipc_send_group_bcast(sock, m, dlen, timeout);
1122 * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets
1123 * @arrvq: queue with arriving messages, to be cloned after destination lookup
1124 * @inputq: queue with cloned messages, delivered to socket after dest lookup
1126 * Multi-threaded: parallel calls with reference to same queues may occur
1128 void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
1129 struct sk_buff_head *inputq)
1131 u32 self = tipc_own_addr(net);
1132 u32 type, lower, upper, scope;
1133 struct sk_buff *skb, *_skb;
1135 struct sk_buff_head tmpq;
1136 struct list_head dports;
1137 struct tipc_msg *hdr;
1138 int user, mtyp, hlen;
1141 __skb_queue_head_init(&tmpq);
1142 INIT_LIST_HEAD(&dports);
1144 skb = tipc_skb_peek(arrvq, &inputq->lock);
1145 for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) {
1147 user = msg_user(hdr);
1148 mtyp = msg_type(hdr);
1149 hlen = skb_headroom(skb) + msg_hdr_sz(hdr);
1150 onode = msg_orignode(hdr);
1151 type = msg_nametype(hdr);
1153 if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) {
1154 spin_lock_bh(&inputq->lock);
1155 if (skb_peek(arrvq) == skb) {
1156 __skb_dequeue(arrvq);
1157 __skb_queue_tail(inputq, skb);
1160 spin_unlock_bh(&inputq->lock);
1164 /* Group messages require exact scope match */
1165 if (msg_in_group(hdr)) {
1168 scope = msg_lookup_scope(hdr);
1171 /* TIPC_NODE_SCOPE means "any scope" in this context */
1173 scope = TIPC_NODE_SCOPE;
1175 scope = TIPC_CLUSTER_SCOPE;
1177 lower = msg_namelower(hdr);
1178 upper = msg_nameupper(hdr);
1181 /* Create destination port list: */
1182 tipc_nametbl_mc_lookup(net, type, lower, upper,
1183 scope, exact, &dports);
1185 /* Clone message per destination */
1186 while (tipc_dest_pop(&dports, NULL, &portid)) {
1187 _skb = __pskb_copy(skb, hlen, GFP_ATOMIC);
1189 msg_set_destport(buf_msg(_skb), portid);
1190 __skb_queue_tail(&tmpq, _skb);
1193 pr_warn("Failed to clone mcast rcv buffer\n");
1195 /* Append to inputq if not already done by other thread */
1196 spin_lock_bh(&inputq->lock);
1197 if (skb_peek(arrvq) == skb) {
1198 skb_queue_splice_tail_init(&tmpq, inputq);
1199 kfree_skb(__skb_dequeue(arrvq));
1201 spin_unlock_bh(&inputq->lock);
1202 __skb_queue_purge(&tmpq);
1205 tipc_sk_rcv(net, inputq);
1209 * tipc_sk_conn_proto_rcv - receive a connection mng protocol message
1210 * @tsk: receiving socket
1211 * @skb: pointer to message buffer.
1213 static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,
1214 struct sk_buff_head *inputq,
1215 struct sk_buff_head *xmitq)
1217 struct tipc_msg *hdr = buf_msg(skb);
1218 u32 onode = tsk_own_node(tsk);
1219 struct sock *sk = &tsk->sk;
1220 int mtyp = msg_type(hdr);
1223 /* Ignore if connection cannot be validated: */
1224 if (!tsk_peer_msg(tsk, hdr)) {
1225 trace_tipc_sk_drop_msg(sk, skb, TIPC_DUMP_NONE, "@proto_rcv!");
1229 if (unlikely(msg_errcode(hdr))) {
1230 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
1231 tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk),
1232 tsk_peer_port(tsk));
1233 sk->sk_state_change(sk);
1235 /* State change is ignored if socket already awake,
1236 * - convert msg to abort msg and add to inqueue
1238 msg_set_user(hdr, TIPC_CRITICAL_IMPORTANCE);
1239 msg_set_type(hdr, TIPC_CONN_MSG);
1240 msg_set_size(hdr, BASIC_H_SIZE);
1241 msg_set_hdr_sz(hdr, BASIC_H_SIZE);
1242 __skb_queue_tail(inputq, skb);
1246 tsk->probe_unacked = false;
1248 if (mtyp == CONN_PROBE) {
1249 msg_set_type(hdr, CONN_PROBE_REPLY);
1250 if (tipc_msg_reverse(onode, &skb, TIPC_OK))
1251 __skb_queue_tail(xmitq, skb);
1253 } else if (mtyp == CONN_ACK) {
1254 conn_cong = tsk_conn_cong(tsk);
1255 tsk->snt_unacked -= msg_conn_ack(hdr);
1256 if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
1257 tsk->snd_win = msg_adv_win(hdr);
1259 sk->sk_write_space(sk);
1260 } else if (mtyp != CONN_PROBE_REPLY) {
1261 pr_warn("Received unknown CONN_PROTO msg\n");
1268 * tipc_sendmsg - send message in connectionless manner
1269 * @sock: socket structure
1270 * @m: message to send
1271 * @dsz: amount of user data to be sent
1273 * Message must have an destination specified explicitly.
1274 * Used for SOCK_RDM and SOCK_DGRAM messages,
1275 * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
1276 * (Note: 'SYN+' is prohibited on SOCK_STREAM.)
1278 * Returns the number of bytes sent on success, or errno otherwise
1280 static int tipc_sendmsg(struct socket *sock,
1281 struct msghdr *m, size_t dsz)
1283 struct sock *sk = sock->sk;
1287 ret = __tipc_sendmsg(sock, m, dsz);
1293 static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)
1295 struct sock *sk = sock->sk;
1296 struct net *net = sock_net(sk);
1297 struct tipc_sock *tsk = tipc_sk(sk);
1298 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
1299 long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
1300 struct list_head *clinks = &tsk->cong_links;
1301 bool syn = !tipc_sk_type_connectionless(sk);
1302 struct tipc_group *grp = tsk->group;
1303 struct tipc_msg *hdr = &tsk->phdr;
1304 struct tipc_name_seq *seq;
1305 struct sk_buff_head pkts;
1306 u32 dport, dnode = 0;
1310 if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE))
1314 if (unlikely(m->msg_namelen < sizeof(*dest)))
1316 if (unlikely(dest->family != AF_TIPC))
1322 return tipc_send_group_bcast(sock, m, dlen, timeout);
1323 if (dest->addrtype == TIPC_ADDR_NAME)
1324 return tipc_send_group_anycast(sock, m, dlen, timeout);
1325 if (dest->addrtype == TIPC_ADDR_ID)
1326 return tipc_send_group_unicast(sock, m, dlen, timeout);
1327 if (dest->addrtype == TIPC_ADDR_MCAST)
1328 return tipc_send_group_mcast(sock, m, dlen, timeout);
1332 if (unlikely(!dest)) {
1334 if (!syn || dest->family != AF_TIPC)
1335 return -EDESTADDRREQ;
1338 if (unlikely(syn)) {
1339 if (sk->sk_state == TIPC_LISTEN)
1341 if (sk->sk_state != TIPC_OPEN)
1345 if (dest->addrtype == TIPC_ADDR_NAME) {
1346 tsk->conn_type = dest->addr.name.name.type;
1347 tsk->conn_instance = dest->addr.name.name.instance;
1349 msg_set_syn(hdr, 1);
1352 seq = &dest->addr.nameseq;
1353 if (dest->addrtype == TIPC_ADDR_MCAST)
1354 return tipc_sendmcast(sock, seq, m, dlen, timeout);
1356 if (dest->addrtype == TIPC_ADDR_NAME) {
1357 type = dest->addr.name.name.type;
1358 inst = dest->addr.name.name.instance;
1359 dnode = dest->addr.name.domain;
1360 msg_set_type(hdr, TIPC_NAMED_MSG);
1361 msg_set_hdr_sz(hdr, NAMED_H_SIZE);
1362 msg_set_nametype(hdr, type);
1363 msg_set_nameinst(hdr, inst);
1364 msg_set_lookup_scope(hdr, tipc_node2scope(dnode));
1365 dport = tipc_nametbl_translate(net, type, inst, &dnode);
1366 msg_set_destnode(hdr, dnode);
1367 msg_set_destport(hdr, dport);
1368 if (unlikely(!dport && !dnode))
1369 return -EHOSTUNREACH;
1370 } else if (dest->addrtype == TIPC_ADDR_ID) {
1371 dnode = dest->addr.id.node;
1372 msg_set_type(hdr, TIPC_DIRECT_MSG);
1373 msg_set_lookup_scope(hdr, 0);
1374 msg_set_destnode(hdr, dnode);
1375 msg_set_destport(hdr, dest->addr.id.ref);
1376 msg_set_hdr_sz(hdr, BASIC_H_SIZE);
1381 /* Block or return if destination link is congested */
1382 rc = tipc_wait_for_cond(sock, &timeout,
1383 !tipc_dest_find(clinks, dnode, 0));
1387 skb_queue_head_init(&pkts);
1388 mtu = tipc_node_get_mtu(net, dnode, tsk->portid);
1389 rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
1390 if (unlikely(rc != dlen))
1392 if (unlikely(syn && !tipc_msg_skb_clone(&pkts, &sk->sk_write_queue)))
1395 trace_tipc_sk_sendmsg(sk, skb_peek(&pkts), TIPC_DUMP_SK_SNDQ, " ");
1396 rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
1397 if (unlikely(rc == -ELINKCONG)) {
1398 tipc_dest_push(clinks, dnode, 0);
1399 tsk->cong_link_cnt++;
1403 if (unlikely(syn && !rc))
1404 tipc_set_sk_state(sk, TIPC_CONNECTING);
1406 return rc ? rc : dlen;
1410 * tipc_sendstream - send stream-oriented data
1411 * @sock: socket structure
1413 * @dsz: total length of data to be transmitted
1415 * Used for SOCK_STREAM data.
1417 * Returns the number of bytes sent on success (or partial success),
1418 * or errno if no data sent
1420 static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz)
1422 struct sock *sk = sock->sk;
1426 ret = __tipc_sendstream(sock, m, dsz);
1432 static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)
1434 struct sock *sk = sock->sk;
1435 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
1436 long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
1437 struct tipc_sock *tsk = tipc_sk(sk);
1438 struct tipc_msg *hdr = &tsk->phdr;
1439 struct net *net = sock_net(sk);
1440 struct sk_buff_head pkts;
1441 u32 dnode = tsk_peer_node(tsk);
1445 skb_queue_head_init(&pkts);
1447 if (unlikely(dlen > INT_MAX))
1450 /* Handle implicit connection setup */
1451 if (unlikely(dest)) {
1452 rc = __tipc_sendmsg(sock, m, dlen);
1453 if (dlen && dlen == rc) {
1454 tsk->peer_caps = tipc_node_get_capabilities(net, dnode);
1455 tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr));
1461 rc = tipc_wait_for_cond(sock, &timeout,
1462 (!tsk->cong_link_cnt &&
1463 !tsk_conn_cong(tsk) &&
1464 tipc_sk_connected(sk)));
1468 send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE);
1469 rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts);
1470 if (unlikely(rc != send))
1473 trace_tipc_sk_sendstream(sk, skb_peek(&pkts),
1474 TIPC_DUMP_SK_SNDQ, " ");
1475 rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
1476 if (unlikely(rc == -ELINKCONG)) {
1477 tsk->cong_link_cnt = 1;
1481 tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE);
1484 } while (sent < dlen && !rc);
1486 return sent ? sent : rc;
1490 * tipc_send_packet - send a connection-oriented message
1491 * @sock: socket structure
1492 * @m: message to send
1493 * @dsz: length of data to be transmitted
1495 * Used for SOCK_SEQPACKET messages.
1497 * Returns the number of bytes sent on success, or errno otherwise
1499 static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz)
1501 if (dsz > TIPC_MAX_USER_MSG_SIZE)
1504 return tipc_sendstream(sock, m, dsz);
1507 /* tipc_sk_finish_conn - complete the setup of a connection
1509 static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port,
1512 struct sock *sk = &tsk->sk;
1513 struct net *net = sock_net(sk);
1514 struct tipc_msg *msg = &tsk->phdr;
1516 msg_set_syn(msg, 0);
1517 msg_set_destnode(msg, peer_node);
1518 msg_set_destport(msg, peer_port);
1519 msg_set_type(msg, TIPC_CONN_MSG);
1520 msg_set_lookup_scope(msg, 0);
1521 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1523 sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV);
1524 tipc_set_sk_state(sk, TIPC_ESTABLISHED);
1525 tipc_node_add_conn(net, peer_node, tsk->portid, peer_port);
1526 tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid);
1527 tsk->peer_caps = tipc_node_get_capabilities(net, peer_node);
1528 __skb_queue_purge(&sk->sk_write_queue);
1529 if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
1532 /* Fall back to message based flow control */
1533 tsk->rcv_win = FLOWCTL_MSG_WIN;
1534 tsk->snd_win = FLOWCTL_MSG_WIN;
1538 * tipc_sk_set_orig_addr - capture sender's address for received message
1539 * @m: descriptor for message info
1540 * @hdr: received message header
1542 * Note: Address is not captured if not requested by receiver.
1544 static void tipc_sk_set_orig_addr(struct msghdr *m, struct sk_buff *skb)
1546 DECLARE_SOCKADDR(struct sockaddr_pair *, srcaddr, m->msg_name);
1547 struct tipc_msg *hdr = buf_msg(skb);
1552 srcaddr->sock.family = AF_TIPC;
1553 srcaddr->sock.addrtype = TIPC_ADDR_ID;
1554 srcaddr->sock.scope = 0;
1555 srcaddr->sock.addr.id.ref = msg_origport(hdr);
1556 srcaddr->sock.addr.id.node = msg_orignode(hdr);
1557 srcaddr->sock.addr.name.domain = 0;
1558 m->msg_namelen = sizeof(struct sockaddr_tipc);
1560 if (!msg_in_group(hdr))
1563 /* Group message users may also want to know sending member's id */
1564 srcaddr->member.family = AF_TIPC;
1565 srcaddr->member.addrtype = TIPC_ADDR_NAME;
1566 srcaddr->member.scope = 0;
1567 srcaddr->member.addr.name.name.type = msg_nametype(hdr);
1568 srcaddr->member.addr.name.name.instance = TIPC_SKB_CB(skb)->orig_member;
1569 srcaddr->member.addr.name.domain = 0;
1570 m->msg_namelen = sizeof(*srcaddr);
1574 * tipc_sk_anc_data_recv - optionally capture ancillary data for received message
1575 * @m: descriptor for message info
1576 * @skb: received message buffer
1577 * @tsk: TIPC port associated with message
1579 * Note: Ancillary data is not captured if not requested by receiver.
1581 * Returns 0 if successful, otherwise errno
1583 static int tipc_sk_anc_data_recv(struct msghdr *m, struct sk_buff *skb,
1584 struct tipc_sock *tsk)
1586 struct tipc_msg *msg;
1593 if (likely(m->msg_controllen == 0))
1597 /* Optionally capture errored message object(s) */
1598 err = msg ? msg_errcode(msg) : 0;
1599 if (unlikely(err)) {
1601 anc_data[1] = msg_data_sz(msg);
1602 res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data);
1606 if (skb_linearize(skb))
1609 res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1],
1616 /* Optionally capture message destination object */
1617 dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG;
1618 switch (dest_type) {
1619 case TIPC_NAMED_MSG:
1621 anc_data[0] = msg_nametype(msg);
1622 anc_data[1] = msg_namelower(msg);
1623 anc_data[2] = msg_namelower(msg);
1625 case TIPC_MCAST_MSG:
1627 anc_data[0] = msg_nametype(msg);
1628 anc_data[1] = msg_namelower(msg);
1629 anc_data[2] = msg_nameupper(msg);
1632 has_name = (tsk->conn_type != 0);
1633 anc_data[0] = tsk->conn_type;
1634 anc_data[1] = tsk->conn_instance;
1635 anc_data[2] = tsk->conn_instance;
1641 res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data);
1649 static void tipc_sk_send_ack(struct tipc_sock *tsk)
1651 struct sock *sk = &tsk->sk;
1652 struct net *net = sock_net(sk);
1653 struct sk_buff *skb = NULL;
1654 struct tipc_msg *msg;
1655 u32 peer_port = tsk_peer_port(tsk);
1656 u32 dnode = tsk_peer_node(tsk);
1658 if (!tipc_sk_connected(sk))
1660 skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0,
1661 dnode, tsk_own_node(tsk), peer_port,
1662 tsk->portid, TIPC_OK);
1666 msg_set_conn_ack(msg, tsk->rcv_unacked);
1667 tsk->rcv_unacked = 0;
1669 /* Adjust to and advertize the correct window limit */
1670 if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) {
1671 tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf);
1672 msg_set_adv_win(msg, tsk->rcv_win);
1674 tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg));
1677 static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop)
1679 struct sock *sk = sock->sk;
1681 long timeo = *timeop;
1682 int err = sock_error(sk);
1688 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1689 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
1690 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1695 timeo = schedule_timeout(timeo);
1699 if (!skb_queue_empty(&sk->sk_receive_queue))
1704 err = sock_intr_errno(timeo);
1705 if (signal_pending(current))
1708 err = sock_error(sk);
1712 finish_wait(sk_sleep(sk), &wait);
1718 * tipc_recvmsg - receive packet-oriented message
1719 * @m: descriptor for message info
1720 * @buflen: length of user buffer area
1721 * @flags: receive flags
1723 * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages.
1724 * If the complete message doesn't fit in user area, truncate it.
1726 * Returns size of returned message data, errno otherwise
1728 static int tipc_recvmsg(struct socket *sock, struct msghdr *m,
1729 size_t buflen, int flags)
1731 struct sock *sk = sock->sk;
1732 bool connected = !tipc_sk_type_connectionless(sk);
1733 struct tipc_sock *tsk = tipc_sk(sk);
1734 int rc, err, hlen, dlen, copy;
1735 struct sk_buff_head xmitq;
1736 struct tipc_msg *hdr;
1737 struct sk_buff *skb;
1741 /* Catch invalid receive requests */
1742 if (unlikely(!buflen))
1746 if (unlikely(connected && sk->sk_state == TIPC_OPEN)) {
1750 timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
1752 /* Step rcv queue to first msg with data or error; wait if necessary */
1754 rc = tipc_wait_for_rcvmsg(sock, &timeout);
1757 skb = skb_peek(&sk->sk_receive_queue);
1759 dlen = msg_data_sz(hdr);
1760 hlen = msg_hdr_sz(hdr);
1761 err = msg_errcode(hdr);
1762 grp_evt = msg_is_grp_evt(hdr);
1763 if (likely(dlen || err))
1765 tsk_advance_rx_queue(sk);
1768 /* Collect msg meta data, including error code and rejected data */
1769 tipc_sk_set_orig_addr(m, skb);
1770 rc = tipc_sk_anc_data_recv(m, skb, tsk);
1775 /* Capture data if non-error msg, otherwise just set return value */
1777 copy = min_t(int, dlen, buflen);
1778 if (unlikely(copy != dlen))
1779 m->msg_flags |= MSG_TRUNC;
1780 rc = skb_copy_datagram_msg(skb, hlen, m, copy);
1784 if (err != TIPC_CONN_SHUTDOWN && connected && !m->msg_control)
1790 /* Mark message as group event if applicable */
1791 if (unlikely(grp_evt)) {
1792 if (msg_grp_evt(hdr) == TIPC_WITHDRAWN)
1793 m->msg_flags |= MSG_EOR;
1794 m->msg_flags |= MSG_OOB;
1798 /* Caption of data or error code/rejected data was successful */
1799 if (unlikely(flags & MSG_PEEK))
1802 /* Send group flow control advertisement when applicable */
1803 if (tsk->group && msg_in_group(hdr) && !grp_evt) {
1804 skb_queue_head_init(&xmitq);
1805 tipc_group_update_rcv_win(tsk->group, tsk_blocks(hlen + dlen),
1806 msg_orignode(hdr), msg_origport(hdr),
1808 tipc_node_distr_xmit(sock_net(sk), &xmitq);
1811 tsk_advance_rx_queue(sk);
1813 if (likely(!connected))
1816 /* Send connection flow control advertisement when applicable */
1817 tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen);
1818 if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE)
1819 tipc_sk_send_ack(tsk);
1822 return rc ? rc : copy;
1826 * tipc_recvstream - receive stream-oriented data
1827 * @m: descriptor for message info
1828 * @buflen: total size of user buffer area
1829 * @flags: receive flags
1831 * Used for SOCK_STREAM messages only. If not enough data is available
1832 * will optionally wait for more; never truncates data.
1834 * Returns size of returned message data, errno otherwise
1836 static int tipc_recvstream(struct socket *sock, struct msghdr *m,
1837 size_t buflen, int flags)
1839 struct sock *sk = sock->sk;
1840 struct tipc_sock *tsk = tipc_sk(sk);
1841 struct sk_buff *skb;
1842 struct tipc_msg *hdr;
1843 struct tipc_skb_cb *skb_cb;
1844 bool peek = flags & MSG_PEEK;
1845 int offset, required, copy, copied = 0;
1846 int hlen, dlen, err, rc;
1849 /* Catch invalid receive attempts */
1850 if (unlikely(!buflen))
1855 if (unlikely(sk->sk_state == TIPC_OPEN)) {
1859 required = sock_rcvlowat(sk, flags & MSG_WAITALL, buflen);
1860 timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
1863 /* Look at first msg in receive queue; wait if necessary */
1864 rc = tipc_wait_for_rcvmsg(sock, &timeout);
1867 skb = skb_peek(&sk->sk_receive_queue);
1868 skb_cb = TIPC_SKB_CB(skb);
1870 dlen = msg_data_sz(hdr);
1871 hlen = msg_hdr_sz(hdr);
1872 err = msg_errcode(hdr);
1874 /* Discard any empty non-errored (SYN-) message */
1875 if (unlikely(!dlen && !err)) {
1876 tsk_advance_rx_queue(sk);
1880 /* Collect msg meta data, incl. error code and rejected data */
1882 tipc_sk_set_orig_addr(m, skb);
1883 rc = tipc_sk_anc_data_recv(m, skb, tsk);
1889 /* Copy data if msg ok, otherwise return error/partial data */
1891 offset = skb_cb->bytes_read;
1892 copy = min_t(int, dlen - offset, buflen - copied);
1893 rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy);
1898 if (unlikely(offset < dlen)) {
1900 skb_cb->bytes_read = offset;
1905 if ((err != TIPC_CONN_SHUTDOWN) && !m->msg_control)
1914 tsk_advance_rx_queue(sk);
1916 /* Send connection flow control advertisement when applicable */
1917 tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen);
1918 if (unlikely(tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE))
1919 tipc_sk_send_ack(tsk);
1921 /* Exit if all requested data or FIN/error received */
1922 if (copied == buflen || err)
1925 } while (!skb_queue_empty(&sk->sk_receive_queue) || copied < required);
1928 return copied ? copied : rc;
1932 * tipc_write_space - wake up thread if port congestion is released
1935 static void tipc_write_space(struct sock *sk)
1937 struct socket_wq *wq;
1940 wq = rcu_dereference(sk->sk_wq);
1941 if (skwq_has_sleeper(wq))
1942 wake_up_interruptible_sync_poll(&wq->wait, EPOLLOUT |
1943 EPOLLWRNORM | EPOLLWRBAND);
1948 * tipc_data_ready - wake up threads to indicate messages have been received
1950 * @len: the length of messages
1952 static void tipc_data_ready(struct sock *sk)
1954 struct socket_wq *wq;
1957 wq = rcu_dereference(sk->sk_wq);
1958 if (skwq_has_sleeper(wq))
1959 wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN |
1960 EPOLLRDNORM | EPOLLRDBAND);
1964 static void tipc_sock_destruct(struct sock *sk)
1966 __skb_queue_purge(&sk->sk_receive_queue);
1969 static void tipc_sk_proto_rcv(struct sock *sk,
1970 struct sk_buff_head *inputq,
1971 struct sk_buff_head *xmitq)
1973 struct sk_buff *skb = __skb_dequeue(inputq);
1974 struct tipc_sock *tsk = tipc_sk(sk);
1975 struct tipc_msg *hdr = buf_msg(skb);
1976 struct tipc_group *grp = tsk->group;
1977 bool wakeup = false;
1979 switch (msg_user(hdr)) {
1981 tipc_sk_conn_proto_rcv(tsk, skb, inputq, xmitq);
1984 tipc_dest_del(&tsk->cong_links, msg_orignode(hdr), 0);
1985 tsk->cong_link_cnt--;
1988 case GROUP_PROTOCOL:
1989 tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq);
1992 tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf,
1993 hdr, inputq, xmitq);
2000 sk->sk_write_space(sk);
2006 * tipc_sk_filter_connect - check incoming message for a connection-based socket
2008 * @skb: pointer to message buffer.
2009 * Returns true if message should be added to receive queue, false otherwise
2011 static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb)
2013 struct sock *sk = &tsk->sk;
2014 struct net *net = sock_net(sk);
2015 struct tipc_msg *hdr = buf_msg(skb);
2016 bool con_msg = msg_connected(hdr);
2017 u32 pport = tsk_peer_port(tsk);
2018 u32 pnode = tsk_peer_node(tsk);
2019 u32 oport = msg_origport(hdr);
2020 u32 onode = msg_orignode(hdr);
2021 int err = msg_errcode(hdr);
2022 unsigned long delay;
2024 if (unlikely(msg_mcast(hdr)))
2027 switch (sk->sk_state) {
2028 case TIPC_CONNECTING:
2030 if (likely(con_msg)) {
2033 tipc_sk_finish_conn(tsk, oport, onode);
2034 msg_set_importance(&tsk->phdr, msg_importance(hdr));
2035 /* ACK+ message with data is added to receive queue */
2036 if (msg_data_sz(hdr))
2038 /* Empty ACK-, - wake up sleeping connect() and drop */
2039 sk->sk_data_ready(sk);
2040 msg_set_dest_droppable(hdr, 1);
2043 /* Ignore connectionless message if not from listening socket */
2044 if (oport != pport || onode != pnode)
2048 if (err != TIPC_ERR_OVERLOAD)
2051 /* Prepare for new setup attempt if we have a SYN clone */
2052 if (skb_queue_empty(&sk->sk_write_queue))
2054 get_random_bytes(&delay, 2);
2055 delay %= (tsk->conn_timeout / 4);
2056 delay = msecs_to_jiffies(delay + 100);
2057 sk_reset_timer(sk, &sk->sk_timer, jiffies + delay);
2060 case TIPC_DISCONNECTING:
2063 /* Accept only SYN message */
2064 if (!msg_is_syn(hdr) &&
2065 tipc_node_get_capabilities(net, onode) & TIPC_SYN_BIT)
2067 if (!con_msg && !err)
2070 case TIPC_ESTABLISHED:
2071 /* Accept only connection-based messages sent by peer */
2072 if (likely(con_msg && !err && pport == oport && pnode == onode))
2074 if (!tsk_peer_msg(tsk, hdr))
2078 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
2079 tipc_node_remove_conn(net, pnode, tsk->portid);
2080 sk->sk_state_change(sk);
2083 pr_err("Unknown sk_state %u\n", sk->sk_state);
2085 /* Abort connection setup attempt */
2086 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
2087 sk->sk_err = ECONNREFUSED;
2088 sk->sk_state_change(sk);
2093 * rcvbuf_limit - get proper overload limit of socket receive queue
2097 * For connection oriented messages, irrespective of importance,
2098 * default queue limit is 2 MB.
2100 * For connectionless messages, queue limits are based on message
2101 * importance as follows:
2103 * TIPC_LOW_IMPORTANCE (2 MB)
2104 * TIPC_MEDIUM_IMPORTANCE (4 MB)
2105 * TIPC_HIGH_IMPORTANCE (8 MB)
2106 * TIPC_CRITICAL_IMPORTANCE (16 MB)
2108 * Returns overload limit according to corresponding message importance
2110 static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb)
2112 struct tipc_sock *tsk = tipc_sk(sk);
2113 struct tipc_msg *hdr = buf_msg(skb);
2115 if (unlikely(msg_in_group(hdr)))
2116 return sk->sk_rcvbuf;
2118 if (unlikely(!msg_connected(hdr)))
2119 return sk->sk_rcvbuf << msg_importance(hdr);
2121 if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL))
2122 return sk->sk_rcvbuf;
2124 return FLOWCTL_MSG_LIM;
2128 * tipc_sk_filter_rcv - validate incoming message
2130 * @skb: pointer to message.
2132 * Enqueues message on receive queue if acceptable; optionally handles
2133 * disconnect indication for a connected socket.
2135 * Called with socket lock already taken
2138 static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,
2139 struct sk_buff_head *xmitq)
2141 bool sk_conn = !tipc_sk_type_connectionless(sk);
2142 struct tipc_sock *tsk = tipc_sk(sk);
2143 struct tipc_group *grp = tsk->group;
2144 struct tipc_msg *hdr = buf_msg(skb);
2145 struct net *net = sock_net(sk);
2146 struct sk_buff_head inputq;
2147 int limit, err = TIPC_OK;
2149 trace_tipc_sk_filter_rcv(sk, skb, TIPC_DUMP_ALL, " ");
2150 TIPC_SKB_CB(skb)->bytes_read = 0;
2151 __skb_queue_head_init(&inputq);
2152 __skb_queue_tail(&inputq, skb);
2154 if (unlikely(!msg_isdata(hdr)))
2155 tipc_sk_proto_rcv(sk, &inputq, xmitq);
2158 tipc_group_filter_msg(grp, &inputq, xmitq);
2160 /* Validate and add to receive buffer if there is space */
2161 while ((skb = __skb_dequeue(&inputq))) {
2163 limit = rcvbuf_limit(sk, skb);
2164 if ((sk_conn && !tipc_sk_filter_connect(tsk, skb)) ||
2165 (!sk_conn && msg_connected(hdr)) ||
2166 (!grp && msg_in_group(hdr)))
2167 err = TIPC_ERR_NO_PORT;
2168 else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) {
2169 trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL,
2171 atomic_inc(&sk->sk_drops);
2172 err = TIPC_ERR_OVERLOAD;
2175 if (unlikely(err)) {
2176 if (tipc_msg_reverse(tipc_own_addr(net), &skb, err)) {
2177 trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_NONE,
2179 __skb_queue_tail(xmitq, skb);
2184 __skb_queue_tail(&sk->sk_receive_queue, skb);
2185 skb_set_owner_r(skb, sk);
2186 trace_tipc_sk_overlimit2(sk, skb, TIPC_DUMP_ALL,
2187 "rcvq >90% allocated!");
2188 sk->sk_data_ready(sk);
2193 * tipc_sk_backlog_rcv - handle incoming message from backlog queue
2197 * Caller must hold socket lock
2199 static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
2201 unsigned int before = sk_rmem_alloc_get(sk);
2202 struct sk_buff_head xmitq;
2205 __skb_queue_head_init(&xmitq);
2207 tipc_sk_filter_rcv(sk, skb, &xmitq);
2208 added = sk_rmem_alloc_get(sk) - before;
2209 atomic_add(added, &tipc_sk(sk)->dupl_rcvcnt);
2211 /* Send pending response/rejected messages, if any */
2212 tipc_node_distr_xmit(sock_net(sk), &xmitq);
2217 * tipc_sk_enqueue - extract all buffers with destination 'dport' from
2218 * inputq and try adding them to socket or backlog queue
2219 * @inputq: list of incoming buffers with potentially different destinations
2220 * @sk: socket where the buffers should be enqueued
2221 * @dport: port number for the socket
2223 * Caller must hold socket lock
2225 static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,
2226 u32 dport, struct sk_buff_head *xmitq)
2228 unsigned long time_limit = jiffies + 2;
2229 struct sk_buff *skb;
2234 while (skb_queue_len(inputq)) {
2235 if (unlikely(time_after_eq(jiffies, time_limit)))
2238 skb = tipc_skb_dequeue(inputq, dport);
2242 /* Add message directly to receive queue if possible */
2243 if (!sock_owned_by_user(sk)) {
2244 tipc_sk_filter_rcv(sk, skb, xmitq);
2248 /* Try backlog, compensating for double-counted bytes */
2249 dcnt = &tipc_sk(sk)->dupl_rcvcnt;
2250 if (!sk->sk_backlog.len)
2251 atomic_set(dcnt, 0);
2252 lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt);
2253 if (likely(!sk_add_backlog(sk, skb, lim))) {
2254 trace_tipc_sk_overlimit1(sk, skb, TIPC_DUMP_ALL,
2255 "bklg & rcvq >90% allocated!");
2259 trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL, "err_overload!");
2260 /* Overload => reject message back to sender */
2261 onode = tipc_own_addr(sock_net(sk));
2262 atomic_inc(&sk->sk_drops);
2263 if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) {
2264 trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_ALL,
2266 __skb_queue_tail(xmitq, skb);
2273 * tipc_sk_rcv - handle a chain of incoming buffers
2274 * @inputq: buffer list containing the buffers
2275 * Consumes all buffers in list until inputq is empty
2276 * Note: may be called in multiple threads referring to the same queue
2278 void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)
2280 struct sk_buff_head xmitq;
2281 u32 dnode, dport = 0;
2283 struct tipc_sock *tsk;
2285 struct sk_buff *skb;
2287 __skb_queue_head_init(&xmitq);
2288 while (skb_queue_len(inputq)) {
2289 dport = tipc_skb_peek_port(inputq, dport);
2290 tsk = tipc_sk_lookup(net, dport);
2294 if (likely(spin_trylock_bh(&sk->sk_lock.slock))) {
2295 tipc_sk_enqueue(inputq, sk, dport, &xmitq);
2296 spin_unlock_bh(&sk->sk_lock.slock);
2298 /* Send pending response/rejected messages, if any */
2299 tipc_node_distr_xmit(sock_net(sk), &xmitq);
2303 /* No destination socket => dequeue skb if still there */
2304 skb = tipc_skb_dequeue(inputq, dport);
2308 /* Try secondary lookup if unresolved named message */
2309 err = TIPC_ERR_NO_PORT;
2310 if (tipc_msg_lookup_dest(net, skb, &err))
2313 /* Prepare for message rejection */
2314 if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err))
2317 trace_tipc_sk_rej_msg(NULL, skb, TIPC_DUMP_NONE, "@sk_rcv!");
2319 dnode = msg_destnode(buf_msg(skb));
2320 tipc_node_xmit_skb(net, skb, dnode, dport);
2324 static int tipc_wait_for_connect(struct socket *sock, long *timeo_p)
2326 DEFINE_WAIT_FUNC(wait, woken_wake_function);
2327 struct sock *sk = sock->sk;
2331 int err = sock_error(sk);
2336 if (signal_pending(current))
2337 return sock_intr_errno(*timeo_p);
2339 add_wait_queue(sk_sleep(sk), &wait);
2340 done = sk_wait_event(sk, timeo_p,
2341 sk->sk_state != TIPC_CONNECTING, &wait);
2342 remove_wait_queue(sk_sleep(sk), &wait);
2348 * tipc_connect - establish a connection to another TIPC port
2349 * @sock: socket structure
2350 * @dest: socket address for destination port
2351 * @destlen: size of socket address data structure
2352 * @flags: file-related flags associated with socket
2354 * Returns 0 on success, errno otherwise
2356 static int tipc_connect(struct socket *sock, struct sockaddr *dest,
2357 int destlen, int flags)
2359 struct sock *sk = sock->sk;
2360 struct tipc_sock *tsk = tipc_sk(sk);
2361 struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest;
2362 struct msghdr m = {NULL,};
2363 long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout;
2367 if (destlen != sizeof(struct sockaddr_tipc))
2377 if (dst->family == AF_UNSPEC) {
2378 memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc));
2379 if (!tipc_sk_type_connectionless(sk))
2382 } else if (dst->family != AF_TIPC) {
2385 if (dst->addrtype != TIPC_ADDR_ID && dst->addrtype != TIPC_ADDR_NAME)
2390 /* DGRAM/RDM connect(), just save the destaddr */
2391 if (tipc_sk_type_connectionless(sk)) {
2392 memcpy(&tsk->peer, dest, destlen);
2396 previous = sk->sk_state;
2398 switch (sk->sk_state) {
2400 /* Send a 'SYN-' to destination */
2402 m.msg_namelen = destlen;
2404 /* If connect is in non-blocking case, set MSG_DONTWAIT to
2405 * indicate send_msg() is never blocked.
2408 m.msg_flags = MSG_DONTWAIT;
2410 res = __tipc_sendmsg(sock, &m, 0);
2411 if ((res < 0) && (res != -EWOULDBLOCK))
2414 /* Just entered TIPC_CONNECTING state; the only
2415 * difference is that return value in non-blocking
2416 * case is EINPROGRESS, rather than EALREADY.
2420 case TIPC_CONNECTING:
2422 if (previous == TIPC_CONNECTING)
2426 timeout = msecs_to_jiffies(timeout);
2427 /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
2428 res = tipc_wait_for_connect(sock, &timeout);
2430 case TIPC_ESTABLISHED:
2443 * tipc_listen - allow socket to listen for incoming connections
2444 * @sock: socket structure
2447 * Returns 0 on success, errno otherwise
2449 static int tipc_listen(struct socket *sock, int len)
2451 struct sock *sk = sock->sk;
2455 res = tipc_set_sk_state(sk, TIPC_LISTEN);
2461 static int tipc_wait_for_accept(struct socket *sock, long timeo)
2463 struct sock *sk = sock->sk;
2467 /* True wake-one mechanism for incoming connections: only
2468 * one process gets woken up, not the 'whole herd'.
2469 * Since we do not 'race & poll' for established sockets
2470 * anymore, the common case will execute the loop only once.
2473 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
2474 TASK_INTERRUPTIBLE);
2475 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
2477 timeo = schedule_timeout(timeo);
2481 if (!skb_queue_empty(&sk->sk_receive_queue))
2486 err = sock_intr_errno(timeo);
2487 if (signal_pending(current))
2490 finish_wait(sk_sleep(sk), &wait);
2495 * tipc_accept - wait for connection request
2496 * @sock: listening socket
2497 * @newsock: new socket that is to be connected
2498 * @flags: file-related flags associated with socket
2500 * Returns 0 on success, errno otherwise
2502 static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags,
2505 struct sock *new_sk, *sk = sock->sk;
2506 struct sk_buff *buf;
2507 struct tipc_sock *new_tsock;
2508 struct tipc_msg *msg;
2514 if (sk->sk_state != TIPC_LISTEN) {
2518 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
2519 res = tipc_wait_for_accept(sock, timeo);
2523 buf = skb_peek(&sk->sk_receive_queue);
2525 res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern);
2528 security_sk_clone(sock->sk, new_sock->sk);
2530 new_sk = new_sock->sk;
2531 new_tsock = tipc_sk(new_sk);
2534 /* we lock on new_sk; but lockdep sees the lock on sk */
2535 lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING);
2538 * Reject any stray messages received by new socket
2539 * before the socket lock was taken (very, very unlikely)
2541 tsk_rej_rx_queue(new_sk);
2543 /* Connect new socket to it's peer */
2544 tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg));
2546 tsk_set_importance(new_tsock, msg_importance(msg));
2547 if (msg_named(msg)) {
2548 new_tsock->conn_type = msg_nametype(msg);
2549 new_tsock->conn_instance = msg_nameinst(msg);
2553 * Respond to 'SYN-' by discarding it & returning 'ACK'-.
2554 * Respond to 'SYN+' by queuing it on new socket.
2556 if (!msg_data_sz(msg)) {
2557 struct msghdr m = {NULL,};
2559 tsk_advance_rx_queue(sk);
2560 __tipc_sendstream(new_sock, &m, 0);
2562 __skb_dequeue(&sk->sk_receive_queue);
2563 __skb_queue_head(&new_sk->sk_receive_queue, buf);
2564 skb_set_owner_r(buf, new_sk);
2566 release_sock(new_sk);
2573 * tipc_shutdown - shutdown socket connection
2574 * @sock: socket structure
2575 * @how: direction to close (must be SHUT_RDWR)
2577 * Terminates connection (if necessary), then purges socket's receive queue.
2579 * Returns 0 on success, errno otherwise
2581 static int tipc_shutdown(struct socket *sock, int how)
2583 struct sock *sk = sock->sk;
2586 if (how != SHUT_RDWR)
2591 trace_tipc_sk_shutdown(sk, NULL, TIPC_DUMP_ALL, " ");
2592 __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN);
2593 sk->sk_shutdown = SEND_SHUTDOWN;
2595 if (sk->sk_state == TIPC_DISCONNECTING) {
2596 /* Discard any unreceived messages */
2597 __skb_queue_purge(&sk->sk_receive_queue);
2599 /* Wake up anyone sleeping in poll */
2600 sk->sk_state_change(sk);
2610 static void tipc_sk_check_probing_state(struct sock *sk,
2611 struct sk_buff_head *list)
2613 struct tipc_sock *tsk = tipc_sk(sk);
2614 u32 pnode = tsk_peer_node(tsk);
2615 u32 pport = tsk_peer_port(tsk);
2616 u32 self = tsk_own_node(tsk);
2617 u32 oport = tsk->portid;
2618 struct sk_buff *skb;
2620 if (tsk->probe_unacked) {
2621 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
2622 sk->sk_err = ECONNABORTED;
2623 tipc_node_remove_conn(sock_net(sk), pnode, pport);
2624 sk->sk_state_change(sk);
2627 /* Prepare new probe */
2628 skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0,
2629 pnode, self, pport, oport, TIPC_OK);
2631 __skb_queue_tail(list, skb);
2632 tsk->probe_unacked = true;
2633 sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV);
2636 static void tipc_sk_retry_connect(struct sock *sk, struct sk_buff_head *list)
2638 struct tipc_sock *tsk = tipc_sk(sk);
2640 /* Try again later if dest link is congested */
2641 if (tsk->cong_link_cnt) {
2642 sk_reset_timer(sk, &sk->sk_timer, msecs_to_jiffies(100));
2645 /* Prepare SYN for retransmit */
2646 tipc_msg_skb_clone(&sk->sk_write_queue, list);
2649 static void tipc_sk_timeout(struct timer_list *t)
2651 struct sock *sk = from_timer(sk, t, sk_timer);
2652 struct tipc_sock *tsk = tipc_sk(sk);
2653 u32 pnode = tsk_peer_node(tsk);
2654 struct sk_buff_head list;
2657 skb_queue_head_init(&list);
2660 /* Try again later if socket is busy */
2661 if (sock_owned_by_user(sk)) {
2662 sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20);
2667 if (sk->sk_state == TIPC_ESTABLISHED)
2668 tipc_sk_check_probing_state(sk, &list);
2669 else if (sk->sk_state == TIPC_CONNECTING)
2670 tipc_sk_retry_connect(sk, &list);
2674 if (!skb_queue_empty(&list))
2675 rc = tipc_node_xmit(sock_net(sk), &list, pnode, tsk->portid);
2677 /* SYN messages may cause link congestion */
2678 if (rc == -ELINKCONG) {
2679 tipc_dest_push(&tsk->cong_links, pnode, 0);
2680 tsk->cong_link_cnt = 1;
2685 static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
2686 struct tipc_name_seq const *seq)
2688 struct sock *sk = &tsk->sk;
2689 struct net *net = sock_net(sk);
2690 struct publication *publ;
2693 if (scope != TIPC_NODE_SCOPE)
2694 scope = TIPC_CLUSTER_SCOPE;
2696 if (tipc_sk_connected(sk))
2698 key = tsk->portid + tsk->pub_count + 1;
2699 if (key == tsk->portid)
2702 publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper,
2703 scope, tsk->portid, key);
2704 if (unlikely(!publ))
2707 list_add(&publ->binding_sock, &tsk->publications);
2713 static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
2714 struct tipc_name_seq const *seq)
2716 struct net *net = sock_net(&tsk->sk);
2717 struct publication *publ;
2718 struct publication *safe;
2721 if (scope != TIPC_NODE_SCOPE)
2722 scope = TIPC_CLUSTER_SCOPE;
2724 list_for_each_entry_safe(publ, safe, &tsk->publications, binding_sock) {
2726 if (publ->scope != scope)
2728 if (publ->type != seq->type)
2730 if (publ->lower != seq->lower)
2732 if (publ->upper != seq->upper)
2734 tipc_nametbl_withdraw(net, publ->type, publ->lower,
2735 publ->upper, publ->key);
2739 tipc_nametbl_withdraw(net, publ->type, publ->lower,
2740 publ->upper, publ->key);
2743 if (list_empty(&tsk->publications))
2748 /* tipc_sk_reinit: set non-zero address in all existing sockets
2749 * when we go from standalone to network mode.
2751 void tipc_sk_reinit(struct net *net)
2753 struct tipc_net *tn = net_generic(net, tipc_net_id);
2754 struct rhashtable_iter iter;
2755 struct tipc_sock *tsk;
2756 struct tipc_msg *msg;
2758 rhashtable_walk_enter(&tn->sk_rht, &iter);
2761 rhashtable_walk_start(&iter);
2763 while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) {
2764 sock_hold(&tsk->sk);
2765 rhashtable_walk_stop(&iter);
2766 lock_sock(&tsk->sk);
2768 msg_set_prevnode(msg, tipc_own_addr(net));
2769 msg_set_orignode(msg, tipc_own_addr(net));
2770 release_sock(&tsk->sk);
2771 rhashtable_walk_start(&iter);
2775 rhashtable_walk_stop(&iter);
2776 } while (tsk == ERR_PTR(-EAGAIN));
2778 rhashtable_walk_exit(&iter);
2781 static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid)
2783 struct tipc_net *tn = net_generic(net, tipc_net_id);
2784 struct tipc_sock *tsk;
2787 tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params);
2789 sock_hold(&tsk->sk);
2795 static int tipc_sk_insert(struct tipc_sock *tsk)
2797 struct sock *sk = &tsk->sk;
2798 struct net *net = sock_net(sk);
2799 struct tipc_net *tn = net_generic(net, tipc_net_id);
2800 u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1;
2801 u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT;
2803 while (remaining--) {
2805 if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT))
2806 portid = TIPC_MIN_PORT;
2807 tsk->portid = portid;
2808 sock_hold(&tsk->sk);
2809 if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node,
2818 static void tipc_sk_remove(struct tipc_sock *tsk)
2820 struct sock *sk = &tsk->sk;
2821 struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id);
2823 if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) {
2824 WARN_ON(refcount_read(&sk->sk_refcnt) == 1);
2829 static const struct rhashtable_params tsk_rht_params = {
2831 .head_offset = offsetof(struct tipc_sock, node),
2832 .key_offset = offsetof(struct tipc_sock, portid),
2833 .key_len = sizeof(u32), /* portid */
2834 .max_size = 1048576,
2836 .automatic_shrinking = true,
2839 int tipc_sk_rht_init(struct net *net)
2841 struct tipc_net *tn = net_generic(net, tipc_net_id);
2843 return rhashtable_init(&tn->sk_rht, &tsk_rht_params);
2846 void tipc_sk_rht_destroy(struct net *net)
2848 struct tipc_net *tn = net_generic(net, tipc_net_id);
2850 /* Wait for socket readers to complete */
2853 rhashtable_destroy(&tn->sk_rht);
2856 static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq)
2858 struct net *net = sock_net(&tsk->sk);
2859 struct tipc_group *grp = tsk->group;
2860 struct tipc_msg *hdr = &tsk->phdr;
2861 struct tipc_name_seq seq;
2864 if (mreq->type < TIPC_RESERVED_TYPES)
2866 if (mreq->scope > TIPC_NODE_SCOPE)
2870 grp = tipc_group_create(net, tsk->portid, mreq, &tsk->group_is_open);
2874 msg_set_lookup_scope(hdr, mreq->scope);
2875 msg_set_nametype(hdr, mreq->type);
2876 msg_set_dest_droppable(hdr, true);
2877 seq.type = mreq->type;
2878 seq.lower = mreq->instance;
2879 seq.upper = seq.lower;
2880 tipc_nametbl_build_group(net, grp, mreq->type, mreq->scope);
2881 rc = tipc_sk_publish(tsk, mreq->scope, &seq);
2883 tipc_group_delete(net, grp);
2887 /* Eliminate any risk that a broadcast overtakes sent JOINs */
2888 tsk->mc_method.rcast = true;
2889 tsk->mc_method.mandatory = true;
2890 tipc_group_join(net, grp, &tsk->sk.sk_rcvbuf);
2894 static int tipc_sk_leave(struct tipc_sock *tsk)
2896 struct net *net = sock_net(&tsk->sk);
2897 struct tipc_group *grp = tsk->group;
2898 struct tipc_name_seq seq;
2903 tipc_group_self(grp, &seq, &scope);
2904 tipc_group_delete(net, grp);
2906 tipc_sk_withdraw(tsk, scope, &seq);
2911 * tipc_setsockopt - set socket option
2912 * @sock: socket structure
2913 * @lvl: option level
2914 * @opt: option identifier
2915 * @ov: pointer to new option value
2916 * @ol: length of option value
2918 * For stream sockets only, accepts and ignores all IPPROTO_TCP options
2919 * (to ease compatibility).
2921 * Returns 0 on success, errno otherwise
2923 static int tipc_setsockopt(struct socket *sock, int lvl, int opt,
2924 char __user *ov, unsigned int ol)
2926 struct sock *sk = sock->sk;
2927 struct tipc_sock *tsk = tipc_sk(sk);
2928 struct tipc_group_req mreq;
2932 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
2934 if (lvl != SOL_TIPC)
2935 return -ENOPROTOOPT;
2938 case TIPC_IMPORTANCE:
2939 case TIPC_SRC_DROPPABLE:
2940 case TIPC_DEST_DROPPABLE:
2941 case TIPC_CONN_TIMEOUT:
2942 if (ol < sizeof(value))
2944 if (get_user(value, (u32 __user *)ov))
2947 case TIPC_GROUP_JOIN:
2948 if (ol < sizeof(mreq))
2950 if (copy_from_user(&mreq, ov, sizeof(mreq)))
2961 case TIPC_IMPORTANCE:
2962 res = tsk_set_importance(tsk, value);
2964 case TIPC_SRC_DROPPABLE:
2965 if (sock->type != SOCK_STREAM)
2966 tsk_set_unreliable(tsk, value);
2970 case TIPC_DEST_DROPPABLE:
2971 tsk_set_unreturnable(tsk, value);
2973 case TIPC_CONN_TIMEOUT:
2974 tipc_sk(sk)->conn_timeout = value;
2976 case TIPC_MCAST_BROADCAST:
2977 tsk->mc_method.rcast = false;
2978 tsk->mc_method.mandatory = true;
2980 case TIPC_MCAST_REPLICAST:
2981 tsk->mc_method.rcast = true;
2982 tsk->mc_method.mandatory = true;
2984 case TIPC_GROUP_JOIN:
2985 res = tipc_sk_join(tsk, &mreq);
2987 case TIPC_GROUP_LEAVE:
2988 res = tipc_sk_leave(tsk);
3000 * tipc_getsockopt - get socket option
3001 * @sock: socket structure
3002 * @lvl: option level
3003 * @opt: option identifier
3004 * @ov: receptacle for option value
3005 * @ol: receptacle for length of option value
3007 * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
3008 * (to ease compatibility).
3010 * Returns 0 on success, errno otherwise
3012 static int tipc_getsockopt(struct socket *sock, int lvl, int opt,
3013 char __user *ov, int __user *ol)
3015 struct sock *sk = sock->sk;
3016 struct tipc_sock *tsk = tipc_sk(sk);
3017 struct tipc_name_seq seq;
3022 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
3023 return put_user(0, ol);
3024 if (lvl != SOL_TIPC)
3025 return -ENOPROTOOPT;
3026 res = get_user(len, ol);
3033 case TIPC_IMPORTANCE:
3034 value = tsk_importance(tsk);
3036 case TIPC_SRC_DROPPABLE:
3037 value = tsk_unreliable(tsk);
3039 case TIPC_DEST_DROPPABLE:
3040 value = tsk_unreturnable(tsk);
3042 case TIPC_CONN_TIMEOUT:
3043 value = tsk->conn_timeout;
3044 /* no need to set "res", since already 0 at this point */
3046 case TIPC_NODE_RECVQ_DEPTH:
3047 value = 0; /* was tipc_queue_size, now obsolete */
3049 case TIPC_SOCK_RECVQ_DEPTH:
3050 value = skb_queue_len(&sk->sk_receive_queue);
3052 case TIPC_GROUP_JOIN:
3055 tipc_group_self(tsk->group, &seq, &scope);
3065 return res; /* "get" failed */
3067 if (len < sizeof(value))
3070 if (copy_to_user(ov, &value, sizeof(value)))
3073 return put_user(sizeof(value), ol);
3076 static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
3078 struct net *net = sock_net(sock->sk);
3079 struct tipc_sioc_nodeid_req nr = {0};
3080 struct tipc_sioc_ln_req lnr;
3081 void __user *argp = (void __user *)arg;
3084 case SIOCGETLINKNAME:
3085 if (copy_from_user(&lnr, argp, sizeof(lnr)))
3087 if (!tipc_node_get_linkname(net,
3088 lnr.bearer_id & 0xffff, lnr.peer,
3089 lnr.linkname, TIPC_MAX_LINK_NAME)) {
3090 if (copy_to_user(argp, &lnr, sizeof(lnr)))
3094 return -EADDRNOTAVAIL;
3096 if (copy_from_user(&nr, argp, sizeof(nr)))
3098 if (!tipc_node_get_id(net, nr.peer, nr.node_id))
3099 return -EADDRNOTAVAIL;
3100 if (copy_to_user(argp, &nr, sizeof(nr)))
3104 return -ENOIOCTLCMD;
3108 static int tipc_socketpair(struct socket *sock1, struct socket *sock2)
3110 struct tipc_sock *tsk2 = tipc_sk(sock2->sk);
3111 struct tipc_sock *tsk1 = tipc_sk(sock1->sk);
3112 u32 onode = tipc_own_addr(sock_net(sock1->sk));
3114 tsk1->peer.family = AF_TIPC;
3115 tsk1->peer.addrtype = TIPC_ADDR_ID;
3116 tsk1->peer.scope = TIPC_NODE_SCOPE;
3117 tsk1->peer.addr.id.ref = tsk2->portid;
3118 tsk1->peer.addr.id.node = onode;
3119 tsk2->peer.family = AF_TIPC;
3120 tsk2->peer.addrtype = TIPC_ADDR_ID;
3121 tsk2->peer.scope = TIPC_NODE_SCOPE;
3122 tsk2->peer.addr.id.ref = tsk1->portid;
3123 tsk2->peer.addr.id.node = onode;
3125 tipc_sk_finish_conn(tsk1, tsk2->portid, onode);
3126 tipc_sk_finish_conn(tsk2, tsk1->portid, onode);
3130 /* Protocol switches for the various types of TIPC sockets */
3132 static const struct proto_ops msg_ops = {
3133 .owner = THIS_MODULE,
3135 .release = tipc_release,
3137 .connect = tipc_connect,
3138 .socketpair = tipc_socketpair,
3139 .accept = sock_no_accept,
3140 .getname = tipc_getname,
3142 .ioctl = tipc_ioctl,
3143 .listen = sock_no_listen,
3144 .shutdown = tipc_shutdown,
3145 .setsockopt = tipc_setsockopt,
3146 .getsockopt = tipc_getsockopt,
3147 .sendmsg = tipc_sendmsg,
3148 .recvmsg = tipc_recvmsg,
3149 .mmap = sock_no_mmap,
3150 .sendpage = sock_no_sendpage
3153 static const struct proto_ops packet_ops = {
3154 .owner = THIS_MODULE,
3156 .release = tipc_release,
3158 .connect = tipc_connect,
3159 .socketpair = tipc_socketpair,
3160 .accept = tipc_accept,
3161 .getname = tipc_getname,
3163 .ioctl = tipc_ioctl,
3164 .listen = tipc_listen,
3165 .shutdown = tipc_shutdown,
3166 .setsockopt = tipc_setsockopt,
3167 .getsockopt = tipc_getsockopt,
3168 .sendmsg = tipc_send_packet,
3169 .recvmsg = tipc_recvmsg,
3170 .mmap = sock_no_mmap,
3171 .sendpage = sock_no_sendpage
3174 static const struct proto_ops stream_ops = {
3175 .owner = THIS_MODULE,
3177 .release = tipc_release,
3179 .connect = tipc_connect,
3180 .socketpair = tipc_socketpair,
3181 .accept = tipc_accept,
3182 .getname = tipc_getname,
3184 .ioctl = tipc_ioctl,
3185 .listen = tipc_listen,
3186 .shutdown = tipc_shutdown,
3187 .setsockopt = tipc_setsockopt,
3188 .getsockopt = tipc_getsockopt,
3189 .sendmsg = tipc_sendstream,
3190 .recvmsg = tipc_recvstream,
3191 .mmap = sock_no_mmap,
3192 .sendpage = sock_no_sendpage
3195 static const struct net_proto_family tipc_family_ops = {
3196 .owner = THIS_MODULE,
3198 .create = tipc_sk_create
3201 static struct proto tipc_proto = {
3203 .owner = THIS_MODULE,
3204 .obj_size = sizeof(struct tipc_sock),
3205 .sysctl_rmem = sysctl_tipc_rmem
3209 * tipc_socket_init - initialize TIPC socket interface
3211 * Returns 0 on success, errno otherwise
3213 int tipc_socket_init(void)
3217 res = proto_register(&tipc_proto, 1);
3219 pr_err("Failed to register TIPC protocol type\n");
3223 res = sock_register(&tipc_family_ops);
3225 pr_err("Failed to register TIPC socket type\n");
3226 proto_unregister(&tipc_proto);
3234 * tipc_socket_stop - stop TIPC socket interface
3236 void tipc_socket_stop(void)
3238 sock_unregister(tipc_family_ops.family);
3239 proto_unregister(&tipc_proto);
3242 /* Caller should hold socket lock for the passed tipc socket. */
3243 static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk)
3247 struct nlattr *nest;
3249 peer_node = tsk_peer_node(tsk);
3250 peer_port = tsk_peer_port(tsk);
3252 nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON);
3254 if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node))
3256 if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port))
3259 if (tsk->conn_type != 0) {
3260 if (nla_put_flag(skb, TIPC_NLA_CON_FLAG))
3262 if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type))
3264 if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance))
3267 nla_nest_end(skb, nest);
3272 nla_nest_cancel(skb, nest);
3277 static int __tipc_nl_add_sk_info(struct sk_buff *skb, struct tipc_sock
3280 struct net *net = sock_net(skb->sk);
3281 struct sock *sk = &tsk->sk;
3283 if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid) ||
3284 nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tipc_own_addr(net)))
3287 if (tipc_sk_connected(sk)) {
3288 if (__tipc_nl_add_sk_con(skb, tsk))
3290 } else if (!list_empty(&tsk->publications)) {
3291 if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL))
3297 /* Caller should hold socket lock for the passed tipc socket. */
3298 static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb,
3299 struct tipc_sock *tsk)
3301 struct nlattr *attrs;
3304 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3305 &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET);