2 * net/tipc/socket.c: TIPC socket API
4 * Copyright (c) 2001-2007, 2012-2016, 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
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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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"
49 #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
50 #define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */
51 #define TIPC_FWD_MSG 1
52 #define TIPC_MAX_PORT 0xffffffff
53 #define TIPC_MIN_PORT 1
56 TIPC_LISTEN = TCP_LISTEN,
57 TIPC_ESTABLISHED = TCP_ESTABLISHED,
58 TIPC_OPEN = TCP_CLOSE,
59 TIPC_DISCONNECTING = TCP_CLOSE_WAIT,
60 TIPC_CONNECTING = TCP_SYN_SENT,
64 * struct tipc_sock - TIPC socket structure
65 * @sk: socket - interacts with 'port' and with user via the socket API
66 * @conn_type: TIPC type used when connection was established
67 * @conn_instance: TIPC instance used when connection was established
68 * @published: non-zero if port has one or more associated names
69 * @max_pkt: maximum packet size "hint" used when building messages sent by port
70 * @portid: unique port identity in TIPC socket hash table
71 * @phdr: preformatted message header used when sending messages
72 * #cong_links: list of congested links
73 * @publications: list of publications for port
74 * @blocking_link: address of the congested link we are currently sleeping on
75 * @pub_count: total # of publications port has made during its lifetime
77 * @conn_timeout: the time we can wait for an unresponded setup request
78 * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue
79 * @cong_link_cnt: number of congested links
80 * @sent_unacked: # messages sent by socket, and not yet acked by peer
81 * @rcv_unacked: # messages read by user, but not yet acked back to peer
82 * @peer: 'connected' peer for dgram/rdm
83 * @node: hash table node
84 * @mc_method: cookie for use between socket and broadcast layer
85 * @rcu: rcu struct for tipc_sock
95 struct list_head cong_links;
96 struct list_head publications;
107 struct sockaddr_tipc peer;
108 struct rhash_head node;
109 struct tipc_mc_method mc_method;
113 static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb);
114 static void tipc_data_ready(struct sock *sk);
115 static void tipc_write_space(struct sock *sk);
116 static void tipc_sock_destruct(struct sock *sk);
117 static int tipc_release(struct socket *sock);
118 static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags);
119 static void tipc_sk_timeout(unsigned long data);
120 static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
121 struct tipc_name_seq const *seq);
122 static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
123 struct tipc_name_seq const *seq);
124 static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid);
125 static int tipc_sk_insert(struct tipc_sock *tsk);
126 static void tipc_sk_remove(struct tipc_sock *tsk);
127 static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz);
128 static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dsz);
130 static const struct proto_ops packet_ops;
131 static const struct proto_ops stream_ops;
132 static const struct proto_ops msg_ops;
133 static struct proto tipc_proto;
134 static const struct rhashtable_params tsk_rht_params;
136 static u32 tsk_own_node(struct tipc_sock *tsk)
138 return msg_prevnode(&tsk->phdr);
141 static u32 tsk_peer_node(struct tipc_sock *tsk)
143 return msg_destnode(&tsk->phdr);
146 static u32 tsk_peer_port(struct tipc_sock *tsk)
148 return msg_destport(&tsk->phdr);
151 static bool tsk_unreliable(struct tipc_sock *tsk)
153 return msg_src_droppable(&tsk->phdr) != 0;
156 static void tsk_set_unreliable(struct tipc_sock *tsk, bool unreliable)
158 msg_set_src_droppable(&tsk->phdr, unreliable ? 1 : 0);
161 static bool tsk_unreturnable(struct tipc_sock *tsk)
163 return msg_dest_droppable(&tsk->phdr) != 0;
166 static void tsk_set_unreturnable(struct tipc_sock *tsk, bool unreturnable)
168 msg_set_dest_droppable(&tsk->phdr, unreturnable ? 1 : 0);
171 static int tsk_importance(struct tipc_sock *tsk)
173 return msg_importance(&tsk->phdr);
176 static int tsk_set_importance(struct tipc_sock *tsk, int imp)
178 if (imp > TIPC_CRITICAL_IMPORTANCE)
180 msg_set_importance(&tsk->phdr, (u32)imp);
184 static struct tipc_sock *tipc_sk(const struct sock *sk)
186 return container_of(sk, struct tipc_sock, sk);
189 static bool tsk_conn_cong(struct tipc_sock *tsk)
191 return tsk->snt_unacked > tsk->snd_win;
194 /* tsk_blocks(): translate a buffer size in bytes to number of
195 * advertisable blocks, taking into account the ratio truesize(len)/len
196 * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ
198 static u16 tsk_adv_blocks(int len)
200 return len / FLOWCTL_BLK_SZ / 4;
203 /* tsk_inc(): increment counter for sent or received data
204 * - If block based flow control is not supported by peer we
205 * fall back to message based ditto, incrementing the counter
207 static u16 tsk_inc(struct tipc_sock *tsk, int msglen)
209 if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL))
210 return ((msglen / FLOWCTL_BLK_SZ) + 1);
215 * tsk_advance_rx_queue - discard first buffer in socket receive queue
217 * Caller must hold socket lock
219 static void tsk_advance_rx_queue(struct sock *sk)
221 kfree_skb(__skb_dequeue(&sk->sk_receive_queue));
224 /* tipc_sk_respond() : send response message back to sender
226 static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err)
230 u32 onode = tipc_own_addr(sock_net(sk));
232 if (!tipc_msg_reverse(onode, &skb, err))
235 dnode = msg_destnode(buf_msg(skb));
236 selector = msg_origport(buf_msg(skb));
237 tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector);
241 * tsk_rej_rx_queue - reject all buffers in socket receive queue
243 * Caller must hold socket lock
245 static void tsk_rej_rx_queue(struct sock *sk)
249 while ((skb = __skb_dequeue(&sk->sk_receive_queue)))
250 tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT);
253 static bool tipc_sk_connected(struct sock *sk)
255 return sk->sk_state == TIPC_ESTABLISHED;
258 /* tipc_sk_type_connectionless - check if the socket is datagram socket
261 * Returns true if connection less, false otherwise
263 static bool tipc_sk_type_connectionless(struct sock *sk)
265 return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM;
268 /* tsk_peer_msg - verify if message was sent by connected port's peer
270 * Handles cases where the node's network address has changed from
271 * the default of <0.0.0> to its configured setting.
273 static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg)
275 struct sock *sk = &tsk->sk;
276 struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id);
277 u32 peer_port = tsk_peer_port(tsk);
281 if (unlikely(!tipc_sk_connected(sk)))
284 if (unlikely(msg_origport(msg) != peer_port))
287 orig_node = msg_orignode(msg);
288 peer_node = tsk_peer_node(tsk);
290 if (likely(orig_node == peer_node))
293 if (!orig_node && (peer_node == tn->own_addr))
296 if (!peer_node && (orig_node == tn->own_addr))
302 /* tipc_set_sk_state - set the sk_state of the socket
305 * Caller must hold socket lock
307 * Returns 0 on success, errno otherwise
309 static int tipc_set_sk_state(struct sock *sk, int state)
311 int oldsk_state = sk->sk_state;
319 case TIPC_CONNECTING:
320 if (oldsk_state == TIPC_OPEN)
323 case TIPC_ESTABLISHED:
324 if (oldsk_state == TIPC_CONNECTING ||
325 oldsk_state == TIPC_OPEN)
328 case TIPC_DISCONNECTING:
329 if (oldsk_state == TIPC_CONNECTING ||
330 oldsk_state == TIPC_ESTABLISHED)
336 sk->sk_state = state;
341 static int tipc_sk_sock_err(struct socket *sock, long *timeout)
343 struct sock *sk = sock->sk;
344 int err = sock_error(sk);
345 int typ = sock->type;
349 if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) {
350 if (sk->sk_state == TIPC_DISCONNECTING)
352 else if (!tipc_sk_connected(sk))
357 if (signal_pending(current))
358 return sock_intr_errno(*timeout);
363 #define tipc_wait_for_cond(sock_, timeout_, condition_) \
368 while (!(condition_) && !done_) { \
369 struct sock *sk_ = sock->sk; \
370 DEFINE_WAIT_FUNC(wait_, woken_wake_function); \
372 rc_ = tipc_sk_sock_err(sock_, timeout_); \
375 prepare_to_wait(sk_sleep(sk_), &wait_, \
376 TASK_INTERRUPTIBLE); \
377 done_ = sk_wait_event(sk_, timeout_, \
378 (condition_), &wait_); \
379 remove_wait_queue(sk_sleep(sk_), &wait_); \
385 * tipc_sk_create - create a TIPC socket
386 * @net: network namespace (must be default network)
387 * @sock: pre-allocated socket structure
388 * @protocol: protocol indicator (must be 0)
389 * @kern: caused by kernel or by userspace?
391 * This routine creates additional data structures used by the TIPC socket,
392 * initializes them, and links them together.
394 * Returns 0 on success, errno otherwise
396 static int tipc_sk_create(struct net *net, struct socket *sock,
397 int protocol, int kern)
400 const struct proto_ops *ops;
402 struct tipc_sock *tsk;
403 struct tipc_msg *msg;
405 /* Validate arguments */
406 if (unlikely(protocol != 0))
407 return -EPROTONOSUPPORT;
409 switch (sock->type) {
424 /* Allocate socket's protocol area */
425 sk = sk_alloc(net, AF_TIPC, GFP_KERNEL, &tipc_proto, kern);
430 tsk->max_pkt = MAX_PKT_DEFAULT;
431 INIT_LIST_HEAD(&tsk->publications);
432 INIT_LIST_HEAD(&tsk->cong_links);
434 tn = net_generic(sock_net(sk), tipc_net_id);
436 /* Finish initializing socket data structures */
438 sock_init_data(sock, sk);
439 tipc_set_sk_state(sk, TIPC_OPEN);
440 if (tipc_sk_insert(tsk)) {
441 pr_warn("Socket create failed; port number exhausted\n");
445 /* Ensure tsk is visible before we read own_addr. */
448 tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG,
451 msg_set_origport(msg, tsk->portid);
452 setup_timer(&sk->sk_timer, tipc_sk_timeout, (unsigned long)tsk);
454 sk->sk_backlog_rcv = tipc_backlog_rcv;
455 sk->sk_rcvbuf = sysctl_tipc_rmem[1];
456 sk->sk_data_ready = tipc_data_ready;
457 sk->sk_write_space = tipc_write_space;
458 sk->sk_destruct = tipc_sock_destruct;
459 tsk->conn_timeout = CONN_TIMEOUT_DEFAULT;
460 atomic_set(&tsk->dupl_rcvcnt, 0);
462 /* Start out with safe limits until we receive an advertised window */
463 tsk->snd_win = tsk_adv_blocks(RCVBUF_MIN);
464 tsk->rcv_win = tsk->snd_win;
466 if (tipc_sk_type_connectionless(sk)) {
467 tsk_set_unreturnable(tsk, true);
468 if (sock->type == SOCK_DGRAM)
469 tsk_set_unreliable(tsk, true);
475 static void tipc_sk_callback(struct rcu_head *head)
477 struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu);
482 /* Caller should hold socket lock for the socket. */
483 static void __tipc_shutdown(struct socket *sock, int error)
485 struct sock *sk = sock->sk;
486 struct tipc_sock *tsk = tipc_sk(sk);
487 struct net *net = sock_net(sk);
488 long timeout = CONN_TIMEOUT_DEFAULT;
489 u32 dnode = tsk_peer_node(tsk);
492 /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */
493 tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt &&
494 !tsk_conn_cong(tsk)));
496 /* Reject all unreceived messages, except on an active connection
497 * (which disconnects locally & sends a 'FIN+' to peer).
499 while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) {
500 if (TIPC_SKB_CB(skb)->bytes_read) {
504 if (!tipc_sk_type_connectionless(sk) &&
505 sk->sk_state != TIPC_DISCONNECTING) {
506 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
507 tipc_node_remove_conn(net, dnode, tsk->portid);
509 tipc_sk_respond(sk, skb, error);
512 if (tipc_sk_type_connectionless(sk))
515 if (sk->sk_state != TIPC_DISCONNECTING) {
516 skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
517 TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode,
518 tsk_own_node(tsk), tsk_peer_port(tsk),
521 tipc_node_xmit_skb(net, skb, dnode, tsk->portid);
522 tipc_node_remove_conn(net, dnode, tsk->portid);
523 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
528 * tipc_release - destroy a TIPC socket
529 * @sock: socket to destroy
531 * This routine cleans up any messages that are still queued on the socket.
532 * For DGRAM and RDM socket types, all queued messages are rejected.
533 * For SEQPACKET and STREAM socket types, the first message is rejected
534 * and any others are discarded. (If the first message on a STREAM socket
535 * is partially-read, it is discarded and the next one is rejected instead.)
537 * NOTE: Rejected messages are not necessarily returned to the sender! They
538 * are returned or discarded according to the "destination droppable" setting
539 * specified for the message by the sender.
541 * Returns 0 on success, errno otherwise
543 static int tipc_release(struct socket *sock)
545 struct sock *sk = sock->sk;
546 struct tipc_sock *tsk;
549 * Exit if socket isn't fully initialized (occurs when a failed accept()
550 * releases a pre-allocated child socket that was never used)
558 __tipc_shutdown(sock, TIPC_ERR_NO_PORT);
559 sk->sk_shutdown = SHUTDOWN_MASK;
560 tipc_sk_withdraw(tsk, 0, NULL);
561 sk_stop_timer(sk, &sk->sk_timer);
564 /* Reject any messages that accumulated in backlog queue */
566 u32_list_purge(&tsk->cong_links);
567 tsk->cong_link_cnt = 0;
568 call_rcu(&tsk->rcu, tipc_sk_callback);
575 * tipc_bind - associate or disassocate TIPC name(s) with a socket
576 * @sock: socket structure
577 * @uaddr: socket address describing name(s) and desired operation
578 * @uaddr_len: size of socket address data structure
580 * Name and name sequence binding is indicated using a positive scope value;
581 * a negative scope value unbinds the specified name. Specifying no name
582 * (i.e. a socket address length of 0) unbinds all names from the socket.
584 * Returns 0 on success, errno otherwise
586 * NOTE: This routine doesn't need to take the socket lock since it doesn't
587 * access any non-constant socket information.
589 static int tipc_bind(struct socket *sock, struct sockaddr *uaddr,
592 struct sock *sk = sock->sk;
593 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
594 struct tipc_sock *tsk = tipc_sk(sk);
598 if (unlikely(!uaddr_len)) {
599 res = tipc_sk_withdraw(tsk, 0, NULL);
603 if (uaddr_len < sizeof(struct sockaddr_tipc)) {
607 if (addr->family != AF_TIPC) {
612 if (addr->addrtype == TIPC_ADDR_NAME)
613 addr->addr.nameseq.upper = addr->addr.nameseq.lower;
614 else if (addr->addrtype != TIPC_ADDR_NAMESEQ) {
619 if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) &&
620 (addr->addr.nameseq.type != TIPC_TOP_SRV) &&
621 (addr->addr.nameseq.type != TIPC_CFG_SRV)) {
626 res = (addr->scope > 0) ?
627 tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) :
628 tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq);
635 * tipc_getname - get port ID of socket or peer socket
636 * @sock: socket structure
637 * @uaddr: area for returned socket address
638 * @uaddr_len: area for returned length of socket address
639 * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID
641 * Returns 0 on success, errno otherwise
643 * NOTE: This routine doesn't need to take the socket lock since it only
644 * accesses socket information that is unchanging (or which changes in
645 * a completely predictable manner).
647 static int tipc_getname(struct socket *sock, struct sockaddr *uaddr,
648 int *uaddr_len, int peer)
650 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
651 struct sock *sk = sock->sk;
652 struct tipc_sock *tsk = tipc_sk(sk);
653 struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id);
655 memset(addr, 0, sizeof(*addr));
657 if ((!tipc_sk_connected(sk)) &&
658 ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING)))
660 addr->addr.id.ref = tsk_peer_port(tsk);
661 addr->addr.id.node = tsk_peer_node(tsk);
663 addr->addr.id.ref = tsk->portid;
664 addr->addr.id.node = tn->own_addr;
667 *uaddr_len = sizeof(*addr);
668 addr->addrtype = TIPC_ADDR_ID;
669 addr->family = AF_TIPC;
671 addr->addr.name.domain = 0;
677 * tipc_poll - read and possibly block on pollmask
678 * @file: file structure associated with the socket
679 * @sock: socket for which to calculate the poll bits
682 * Returns pollmask value
685 * It appears that the usual socket locking mechanisms are not useful here
686 * since the pollmask info is potentially out-of-date the moment this routine
687 * exits. TCP and other protocols seem to rely on higher level poll routines
688 * to handle any preventable race conditions, so TIPC will do the same ...
690 * IMPORTANT: The fact that a read or write operation is indicated does NOT
691 * imply that the operation will succeed, merely that it should be performed
692 * and will not block.
694 static unsigned int tipc_poll(struct file *file, struct socket *sock,
697 struct sock *sk = sock->sk;
698 struct tipc_sock *tsk = tipc_sk(sk);
701 sock_poll_wait(file, sk_sleep(sk), wait);
703 if (sk->sk_shutdown & RCV_SHUTDOWN)
704 mask |= POLLRDHUP | POLLIN | POLLRDNORM;
705 if (sk->sk_shutdown == SHUTDOWN_MASK)
708 switch (sk->sk_state) {
709 case TIPC_ESTABLISHED:
710 if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk))
714 case TIPC_CONNECTING:
715 if (!skb_queue_empty(&sk->sk_receive_queue))
716 mask |= (POLLIN | POLLRDNORM);
719 if (!tsk->cong_link_cnt)
721 if (tipc_sk_type_connectionless(sk) &&
722 (!skb_queue_empty(&sk->sk_receive_queue)))
723 mask |= (POLLIN | POLLRDNORM);
725 case TIPC_DISCONNECTING:
726 mask = (POLLIN | POLLRDNORM | POLLHUP);
734 * tipc_sendmcast - send multicast message
735 * @sock: socket structure
736 * @seq: destination address
737 * @msg: message to send
738 * @dlen: length of data to send
739 * @timeout: timeout to wait for wakeup
741 * Called from function tipc_sendmsg(), which has done all sanity checks
742 * Returns the number of bytes sent on success, or errno
744 static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
745 struct msghdr *msg, size_t dlen, long timeout)
747 struct sock *sk = sock->sk;
748 struct tipc_sock *tsk = tipc_sk(sk);
749 struct tipc_msg *hdr = &tsk->phdr;
750 struct net *net = sock_net(sk);
751 int mtu = tipc_bcast_get_mtu(net);
752 struct tipc_mc_method *method = &tsk->mc_method;
753 u32 domain = addr_domain(net, TIPC_CLUSTER_SCOPE);
754 struct sk_buff_head pkts;
755 struct tipc_nlist dsts;
758 /* Block or return if any destination link is congested */
759 rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt);
763 /* Lookup destination nodes */
764 tipc_nlist_init(&dsts, tipc_own_addr(net));
765 tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower,
766 seq->upper, domain, &dsts);
767 if (!dsts.local && !dsts.remote)
768 return -EHOSTUNREACH;
770 /* Build message header */
771 msg_set_type(hdr, TIPC_MCAST_MSG);
772 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
773 msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE);
774 msg_set_destport(hdr, 0);
775 msg_set_destnode(hdr, 0);
776 msg_set_nametype(hdr, seq->type);
777 msg_set_namelower(hdr, seq->lower);
778 msg_set_nameupper(hdr, seq->upper);
780 /* Build message as chain of buffers */
781 skb_queue_head_init(&pkts);
782 rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts);
784 /* Send message if build was successful */
785 if (unlikely(rc == dlen))
786 rc = tipc_mcast_xmit(net, &pkts, method, &dsts,
787 &tsk->cong_link_cnt);
789 tipc_nlist_purge(&dsts);
791 return rc ? rc : dlen;
795 * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets
796 * @arrvq: queue with arriving messages, to be cloned after destination lookup
797 * @inputq: queue with cloned messages, delivered to socket after dest lookup
799 * Multi-threaded: parallel calls with reference to same queues may occur
801 void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
802 struct sk_buff_head *inputq)
804 struct tipc_msg *msg;
805 struct list_head dports;
807 u32 scope = TIPC_CLUSTER_SCOPE;
808 struct sk_buff_head tmpq;
810 struct sk_buff *skb, *_skb;
812 __skb_queue_head_init(&tmpq);
813 INIT_LIST_HEAD(&dports);
815 skb = tipc_skb_peek(arrvq, &inputq->lock);
816 for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) {
818 hsz = skb_headroom(skb) + msg_hdr_sz(msg);
820 if (in_own_node(net, msg_orignode(msg)))
821 scope = TIPC_NODE_SCOPE;
823 /* Create destination port list and message clones: */
824 tipc_nametbl_mc_translate(net,
825 msg_nametype(msg), msg_namelower(msg),
826 msg_nameupper(msg), scope, &dports);
827 portid = u32_pop(&dports);
828 for (; portid; portid = u32_pop(&dports)) {
829 _skb = __pskb_copy(skb, hsz, GFP_ATOMIC);
831 msg_set_destport(buf_msg(_skb), portid);
832 __skb_queue_tail(&tmpq, _skb);
835 pr_warn("Failed to clone mcast rcv buffer\n");
837 /* Append to inputq if not already done by other thread */
838 spin_lock_bh(&inputq->lock);
839 if (skb_peek(arrvq) == skb) {
840 skb_queue_splice_tail_init(&tmpq, inputq);
841 kfree_skb(__skb_dequeue(arrvq));
843 spin_unlock_bh(&inputq->lock);
844 __skb_queue_purge(&tmpq);
847 tipc_sk_rcv(net, inputq);
851 * tipc_sk_proto_rcv - receive a connection mng protocol message
852 * @tsk: receiving socket
853 * @skb: pointer to message buffer.
855 static void tipc_sk_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,
856 struct sk_buff_head *xmitq)
858 struct sock *sk = &tsk->sk;
859 u32 onode = tsk_own_node(tsk);
860 struct tipc_msg *hdr = buf_msg(skb);
861 int mtyp = msg_type(hdr);
864 /* Ignore if connection cannot be validated: */
865 if (!tsk_peer_msg(tsk, hdr))
868 tsk->probe_unacked = false;
870 if (mtyp == CONN_PROBE) {
871 msg_set_type(hdr, CONN_PROBE_REPLY);
872 if (tipc_msg_reverse(onode, &skb, TIPC_OK))
873 __skb_queue_tail(xmitq, skb);
875 } else if (mtyp == CONN_ACK) {
876 conn_cong = tsk_conn_cong(tsk);
877 tsk->snt_unacked -= msg_conn_ack(hdr);
878 if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
879 tsk->snd_win = msg_adv_win(hdr);
881 sk->sk_write_space(sk);
882 } else if (mtyp != CONN_PROBE_REPLY) {
883 pr_warn("Received unknown CONN_PROTO msg\n");
890 * tipc_sendmsg - send message in connectionless manner
891 * @sock: socket structure
892 * @m: message to send
893 * @dsz: amount of user data to be sent
895 * Message must have an destination specified explicitly.
896 * Used for SOCK_RDM and SOCK_DGRAM messages,
897 * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
898 * (Note: 'SYN+' is prohibited on SOCK_STREAM.)
900 * Returns the number of bytes sent on success, or errno otherwise
902 static int tipc_sendmsg(struct socket *sock,
903 struct msghdr *m, size_t dsz)
905 struct sock *sk = sock->sk;
909 ret = __tipc_sendmsg(sock, m, dsz);
915 static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)
917 struct sock *sk = sock->sk;
918 struct net *net = sock_net(sk);
919 struct tipc_sock *tsk = tipc_sk(sk);
920 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
921 long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
922 struct list_head *clinks = &tsk->cong_links;
923 bool syn = !tipc_sk_type_connectionless(sk);
924 struct tipc_msg *hdr = &tsk->phdr;
925 struct tipc_name_seq *seq;
926 struct sk_buff_head pkts;
927 u32 type, inst, domain;
931 if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE))
934 if (unlikely(!dest)) {
936 if (!syn || dest->family != AF_TIPC)
937 return -EDESTADDRREQ;
940 if (unlikely(m->msg_namelen < sizeof(*dest)))
943 if (unlikely(dest->family != AF_TIPC))
947 if (sk->sk_state == TIPC_LISTEN)
949 if (sk->sk_state != TIPC_OPEN)
953 if (dest->addrtype == TIPC_ADDR_NAME) {
954 tsk->conn_type = dest->addr.name.name.type;
955 tsk->conn_instance = dest->addr.name.name.instance;
959 seq = &dest->addr.nameseq;
960 if (dest->addrtype == TIPC_ADDR_MCAST)
961 return tipc_sendmcast(sock, seq, m, dlen, timeout);
963 if (dest->addrtype == TIPC_ADDR_NAME) {
964 type = dest->addr.name.name.type;
965 inst = dest->addr.name.name.instance;
966 domain = dest->addr.name.domain;
968 msg_set_type(hdr, TIPC_NAMED_MSG);
969 msg_set_hdr_sz(hdr, NAMED_H_SIZE);
970 msg_set_nametype(hdr, type);
971 msg_set_nameinst(hdr, inst);
972 msg_set_lookup_scope(hdr, tipc_addr_scope(domain));
973 dport = tipc_nametbl_translate(net, type, inst, &dnode);
974 msg_set_destnode(hdr, dnode);
975 msg_set_destport(hdr, dport);
976 if (unlikely(!dport && !dnode))
977 return -EHOSTUNREACH;
979 } else if (dest->addrtype == TIPC_ADDR_ID) {
980 dnode = dest->addr.id.node;
981 msg_set_type(hdr, TIPC_DIRECT_MSG);
982 msg_set_lookup_scope(hdr, 0);
983 msg_set_destnode(hdr, dnode);
984 msg_set_destport(hdr, dest->addr.id.ref);
985 msg_set_hdr_sz(hdr, BASIC_H_SIZE);
988 /* Block or return if destination link is congested */
989 rc = tipc_wait_for_cond(sock, &timeout, !u32_find(clinks, dnode));
993 skb_queue_head_init(&pkts);
994 mtu = tipc_node_get_mtu(net, dnode, tsk->portid);
995 rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
996 if (unlikely(rc != dlen))
999 rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
1000 if (unlikely(rc == -ELINKCONG)) {
1001 u32_push(clinks, dnode);
1002 tsk->cong_link_cnt++;
1006 if (unlikely(syn && !rc))
1007 tipc_set_sk_state(sk, TIPC_CONNECTING);
1009 return rc ? rc : dlen;
1013 * tipc_sendstream - send stream-oriented data
1014 * @sock: socket structure
1016 * @dsz: total length of data to be transmitted
1018 * Used for SOCK_STREAM data.
1020 * Returns the number of bytes sent on success (or partial success),
1021 * or errno if no data sent
1023 static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz)
1025 struct sock *sk = sock->sk;
1029 ret = __tipc_sendstream(sock, m, dsz);
1035 static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)
1037 struct sock *sk = sock->sk;
1038 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
1039 long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
1040 struct tipc_sock *tsk = tipc_sk(sk);
1041 struct tipc_msg *hdr = &tsk->phdr;
1042 struct net *net = sock_net(sk);
1043 struct sk_buff_head pkts;
1044 u32 dnode = tsk_peer_node(tsk);
1048 skb_queue_head_init(&pkts);
1050 if (unlikely(dlen > INT_MAX))
1053 /* Handle implicit connection setup */
1054 if (unlikely(dest)) {
1055 rc = __tipc_sendmsg(sock, m, dlen);
1056 if (dlen && (dlen == rc))
1057 tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr));
1062 rc = tipc_wait_for_cond(sock, &timeout,
1063 (!tsk->cong_link_cnt &&
1064 !tsk_conn_cong(tsk) &&
1065 tipc_sk_connected(sk)));
1069 send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE);
1070 rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts);
1071 if (unlikely(rc != send))
1074 rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
1075 if (unlikely(rc == -ELINKCONG)) {
1076 tsk->cong_link_cnt = 1;
1080 tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE);
1083 } while (sent < dlen && !rc);
1085 return rc ? rc : sent;
1089 * tipc_send_packet - send a connection-oriented message
1090 * @sock: socket structure
1091 * @m: message to send
1092 * @dsz: length of data to be transmitted
1094 * Used for SOCK_SEQPACKET messages.
1096 * Returns the number of bytes sent on success, or errno otherwise
1098 static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz)
1100 if (dsz > TIPC_MAX_USER_MSG_SIZE)
1103 return tipc_sendstream(sock, m, dsz);
1106 /* tipc_sk_finish_conn - complete the setup of a connection
1108 static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port,
1111 struct sock *sk = &tsk->sk;
1112 struct net *net = sock_net(sk);
1113 struct tipc_msg *msg = &tsk->phdr;
1115 msg_set_destnode(msg, peer_node);
1116 msg_set_destport(msg, peer_port);
1117 msg_set_type(msg, TIPC_CONN_MSG);
1118 msg_set_lookup_scope(msg, 0);
1119 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1121 sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL);
1122 tipc_set_sk_state(sk, TIPC_ESTABLISHED);
1123 tipc_node_add_conn(net, peer_node, tsk->portid, peer_port);
1124 tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid);
1125 tsk->peer_caps = tipc_node_get_capabilities(net, peer_node);
1126 if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
1129 /* Fall back to message based flow control */
1130 tsk->rcv_win = FLOWCTL_MSG_WIN;
1131 tsk->snd_win = FLOWCTL_MSG_WIN;
1135 * set_orig_addr - capture sender's address for received message
1136 * @m: descriptor for message info
1137 * @msg: received message header
1139 * Note: Address is not captured if not requested by receiver.
1141 static void set_orig_addr(struct msghdr *m, struct tipc_msg *msg)
1143 DECLARE_SOCKADDR(struct sockaddr_tipc *, addr, m->msg_name);
1146 addr->family = AF_TIPC;
1147 addr->addrtype = TIPC_ADDR_ID;
1148 memset(&addr->addr, 0, sizeof(addr->addr));
1149 addr->addr.id.ref = msg_origport(msg);
1150 addr->addr.id.node = msg_orignode(msg);
1151 addr->addr.name.domain = 0; /* could leave uninitialized */
1152 addr->scope = 0; /* could leave uninitialized */
1153 m->msg_namelen = sizeof(struct sockaddr_tipc);
1158 * tipc_sk_anc_data_recv - optionally capture ancillary data for received message
1159 * @m: descriptor for message info
1160 * @msg: received message header
1161 * @tsk: TIPC port associated with message
1163 * Note: Ancillary data is not captured if not requested by receiver.
1165 * Returns 0 if successful, otherwise errno
1167 static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
1168 struct tipc_sock *tsk)
1176 if (likely(m->msg_controllen == 0))
1179 /* Optionally capture errored message object(s) */
1180 err = msg ? msg_errcode(msg) : 0;
1181 if (unlikely(err)) {
1183 anc_data[1] = msg_data_sz(msg);
1184 res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data);
1188 res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1],
1195 /* Optionally capture message destination object */
1196 dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG;
1197 switch (dest_type) {
1198 case TIPC_NAMED_MSG:
1200 anc_data[0] = msg_nametype(msg);
1201 anc_data[1] = msg_namelower(msg);
1202 anc_data[2] = msg_namelower(msg);
1204 case TIPC_MCAST_MSG:
1206 anc_data[0] = msg_nametype(msg);
1207 anc_data[1] = msg_namelower(msg);
1208 anc_data[2] = msg_nameupper(msg);
1211 has_name = (tsk->conn_type != 0);
1212 anc_data[0] = tsk->conn_type;
1213 anc_data[1] = tsk->conn_instance;
1214 anc_data[2] = tsk->conn_instance;
1220 res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data);
1228 static void tipc_sk_send_ack(struct tipc_sock *tsk)
1230 struct sock *sk = &tsk->sk;
1231 struct net *net = sock_net(sk);
1232 struct sk_buff *skb = NULL;
1233 struct tipc_msg *msg;
1234 u32 peer_port = tsk_peer_port(tsk);
1235 u32 dnode = tsk_peer_node(tsk);
1237 if (!tipc_sk_connected(sk))
1239 skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0,
1240 dnode, tsk_own_node(tsk), peer_port,
1241 tsk->portid, TIPC_OK);
1245 msg_set_conn_ack(msg, tsk->rcv_unacked);
1246 tsk->rcv_unacked = 0;
1248 /* Adjust to and advertize the correct window limit */
1249 if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) {
1250 tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf);
1251 msg_set_adv_win(msg, tsk->rcv_win);
1253 tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg));
1256 static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop)
1258 struct sock *sk = sock->sk;
1260 long timeo = *timeop;
1264 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1265 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
1266 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1271 timeo = schedule_timeout(timeo);
1275 if (!skb_queue_empty(&sk->sk_receive_queue))
1280 err = sock_intr_errno(timeo);
1281 if (signal_pending(current))
1284 finish_wait(sk_sleep(sk), &wait);
1290 * tipc_recvmsg - receive packet-oriented message
1291 * @m: descriptor for message info
1292 * @buf_len: total size of user buffer area
1293 * @flags: receive flags
1295 * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages.
1296 * If the complete message doesn't fit in user area, truncate it.
1298 * Returns size of returned message data, errno otherwise
1300 static int tipc_recvmsg(struct socket *sock, struct msghdr *m, size_t buf_len,
1303 struct sock *sk = sock->sk;
1304 struct tipc_sock *tsk = tipc_sk(sk);
1305 struct sk_buff *buf;
1306 struct tipc_msg *msg;
1307 bool is_connectionless = tipc_sk_type_connectionless(sk);
1313 /* Catch invalid receive requests */
1314 if (unlikely(!buf_len))
1319 if (!is_connectionless && unlikely(sk->sk_state == TIPC_OPEN)) {
1324 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
1327 /* Look for a message in receive queue; wait if necessary */
1328 res = tipc_wait_for_rcvmsg(sock, &timeo);
1332 /* Look at first message in receive queue */
1333 buf = skb_peek(&sk->sk_receive_queue);
1335 sz = msg_data_sz(msg);
1336 hlen = msg_hdr_sz(msg);
1337 err = msg_errcode(msg);
1339 /* Discard an empty non-errored message & try again */
1340 if ((!sz) && (!err)) {
1341 tsk_advance_rx_queue(sk);
1345 /* Capture sender's address (optional) */
1346 set_orig_addr(m, msg);
1348 /* Capture ancillary data (optional) */
1349 res = tipc_sk_anc_data_recv(m, msg, tsk);
1353 /* Capture message data (if valid) & compute return value (always) */
1355 if (unlikely(buf_len < sz)) {
1357 m->msg_flags |= MSG_TRUNC;
1359 res = skb_copy_datagram_msg(buf, hlen, m, sz);
1364 if (is_connectionless || err == TIPC_CONN_SHUTDOWN ||
1371 if (unlikely(flags & MSG_PEEK))
1374 if (likely(!is_connectionless)) {
1375 tsk->rcv_unacked += tsk_inc(tsk, hlen + sz);
1376 if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4)))
1377 tipc_sk_send_ack(tsk);
1379 tsk_advance_rx_queue(sk);
1386 * tipc_recv_stream - receive stream-oriented data
1387 * @m: descriptor for message info
1388 * @buf_len: total size of user buffer area
1389 * @flags: receive flags
1391 * Used for SOCK_STREAM messages only. If not enough data is available
1392 * will optionally wait for more; never truncates data.
1394 * Returns size of returned message data, errno otherwise
1396 static int tipc_recv_stream(struct socket *sock, struct msghdr *m,
1397 size_t buf_len, int flags)
1399 struct sock *sk = sock->sk;
1400 struct tipc_sock *tsk = tipc_sk(sk);
1401 struct sk_buff *buf;
1402 struct tipc_msg *msg;
1410 /* Catch invalid receive attempts */
1411 if (unlikely(!buf_len))
1416 if (unlikely(sk->sk_state == TIPC_OPEN)) {
1421 target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
1422 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
1425 /* Look for a message in receive queue; wait if necessary */
1426 res = tipc_wait_for_rcvmsg(sock, &timeo);
1430 /* Look at first message in receive queue */
1431 buf = skb_peek(&sk->sk_receive_queue);
1433 sz = msg_data_sz(msg);
1434 hlen = msg_hdr_sz(msg);
1435 err = msg_errcode(msg);
1437 /* Discard an empty non-errored message & try again */
1438 if ((!sz) && (!err)) {
1439 tsk_advance_rx_queue(sk);
1443 /* Optionally capture sender's address & ancillary data of first msg */
1444 if (sz_copied == 0) {
1445 set_orig_addr(m, msg);
1446 res = tipc_sk_anc_data_recv(m, msg, tsk);
1451 /* Capture message data (if valid) & compute return value (always) */
1453 u32 offset = TIPC_SKB_CB(buf)->bytes_read;
1458 needed = (buf_len - sz_copied);
1459 sz_to_copy = min(sz, needed);
1461 res = skb_copy_datagram_msg(buf, hlen + offset, m, sz_to_copy);
1465 sz_copied += sz_to_copy;
1467 if (sz_to_copy < sz) {
1468 if (!(flags & MSG_PEEK))
1469 TIPC_SKB_CB(buf)->bytes_read =
1470 offset + sz_to_copy;
1475 goto exit; /* can't add error msg to valid data */
1477 if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)
1483 if (unlikely(flags & MSG_PEEK))
1486 tsk->rcv_unacked += tsk_inc(tsk, hlen + sz);
1487 if (unlikely(tsk->rcv_unacked >= (tsk->rcv_win / 4)))
1488 tipc_sk_send_ack(tsk);
1489 tsk_advance_rx_queue(sk);
1491 /* Loop around if more data is required */
1492 if ((sz_copied < buf_len) && /* didn't get all requested data */
1493 (!skb_queue_empty(&sk->sk_receive_queue) ||
1494 (sz_copied < target)) && /* and more is ready or required */
1495 (!err)) /* and haven't reached a FIN */
1500 return sz_copied ? sz_copied : res;
1504 * tipc_write_space - wake up thread if port congestion is released
1507 static void tipc_write_space(struct sock *sk)
1509 struct socket_wq *wq;
1512 wq = rcu_dereference(sk->sk_wq);
1513 if (skwq_has_sleeper(wq))
1514 wake_up_interruptible_sync_poll(&wq->wait, POLLOUT |
1515 POLLWRNORM | POLLWRBAND);
1520 * tipc_data_ready - wake up threads to indicate messages have been received
1522 * @len: the length of messages
1524 static void tipc_data_ready(struct sock *sk)
1526 struct socket_wq *wq;
1529 wq = rcu_dereference(sk->sk_wq);
1530 if (skwq_has_sleeper(wq))
1531 wake_up_interruptible_sync_poll(&wq->wait, POLLIN |
1532 POLLRDNORM | POLLRDBAND);
1536 static void tipc_sock_destruct(struct sock *sk)
1538 __skb_queue_purge(&sk->sk_receive_queue);
1542 * filter_connect - Handle all incoming messages for a connection-based socket
1544 * @skb: pointer to message buffer. Set to NULL if buffer is consumed
1546 * Returns true if everything ok, false otherwise
1548 static bool filter_connect(struct tipc_sock *tsk, struct sk_buff *skb)
1550 struct sock *sk = &tsk->sk;
1551 struct net *net = sock_net(sk);
1552 struct tipc_msg *hdr = buf_msg(skb);
1554 if (unlikely(msg_mcast(hdr)))
1557 switch (sk->sk_state) {
1558 case TIPC_CONNECTING:
1559 /* Accept only ACK or NACK message */
1560 if (unlikely(!msg_connected(hdr)))
1563 if (unlikely(msg_errcode(hdr))) {
1564 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
1565 sk->sk_err = ECONNREFUSED;
1569 if (unlikely(!msg_isdata(hdr))) {
1570 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
1571 sk->sk_err = EINVAL;
1575 tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr));
1576 msg_set_importance(&tsk->phdr, msg_importance(hdr));
1578 /* If 'ACK+' message, add to socket receive queue */
1579 if (msg_data_sz(hdr))
1582 /* If empty 'ACK-' message, wake up sleeping connect() */
1583 if (waitqueue_active(sk_sleep(sk)))
1584 wake_up_interruptible(sk_sleep(sk));
1586 /* 'ACK-' message is neither accepted nor rejected: */
1587 msg_set_dest_droppable(hdr, 1);
1591 case TIPC_DISCONNECTING:
1594 /* Accept only SYN message */
1595 if (!msg_connected(hdr) && !(msg_errcode(hdr)))
1598 case TIPC_ESTABLISHED:
1599 /* Accept only connection-based messages sent by peer */
1600 if (unlikely(!tsk_peer_msg(tsk, hdr)))
1603 if (unlikely(msg_errcode(hdr))) {
1604 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
1605 /* Let timer expire on it's own */
1606 tipc_node_remove_conn(net, tsk_peer_node(tsk),
1608 sk->sk_state_change(sk);
1612 pr_err("Unknown sk_state %u\n", sk->sk_state);
1619 * rcvbuf_limit - get proper overload limit of socket receive queue
1623 * For connection oriented messages, irrespective of importance,
1624 * default queue limit is 2 MB.
1626 * For connectionless messages, queue limits are based on message
1627 * importance as follows:
1629 * TIPC_LOW_IMPORTANCE (2 MB)
1630 * TIPC_MEDIUM_IMPORTANCE (4 MB)
1631 * TIPC_HIGH_IMPORTANCE (8 MB)
1632 * TIPC_CRITICAL_IMPORTANCE (16 MB)
1634 * Returns overload limit according to corresponding message importance
1636 static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb)
1638 struct tipc_sock *tsk = tipc_sk(sk);
1639 struct tipc_msg *hdr = buf_msg(skb);
1641 if (unlikely(!msg_connected(hdr)))
1642 return sk->sk_rcvbuf << msg_importance(hdr);
1644 if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL))
1645 return sk->sk_rcvbuf;
1647 return FLOWCTL_MSG_LIM;
1651 * filter_rcv - validate incoming message
1653 * @skb: pointer to message.
1655 * Enqueues message on receive queue if acceptable; optionally handles
1656 * disconnect indication for a connected socket.
1658 * Called with socket lock already taken
1660 * Returns true if message was added to socket receive queue, otherwise false
1662 static bool filter_rcv(struct sock *sk, struct sk_buff *skb,
1663 struct sk_buff_head *xmitq)
1665 struct tipc_sock *tsk = tipc_sk(sk);
1666 struct tipc_msg *hdr = buf_msg(skb);
1667 unsigned int limit = rcvbuf_limit(sk, skb);
1669 int usr = msg_user(hdr);
1672 if (unlikely(msg_user(hdr) == CONN_MANAGER)) {
1673 tipc_sk_proto_rcv(tsk, skb, xmitq);
1677 if (unlikely(usr == SOCK_WAKEUP)) {
1678 onode = msg_orignode(hdr);
1680 u32_del(&tsk->cong_links, onode);
1681 tsk->cong_link_cnt--;
1682 sk->sk_write_space(sk);
1686 /* Drop if illegal message type */
1687 if (unlikely(msg_type(hdr) > TIPC_DIRECT_MSG)) {
1692 /* Reject if wrong message type for current socket state */
1693 if (tipc_sk_type_connectionless(sk)) {
1694 if (msg_connected(hdr)) {
1695 err = TIPC_ERR_NO_PORT;
1698 } else if (unlikely(!filter_connect(tsk, skb))) {
1699 err = TIPC_ERR_NO_PORT;
1703 /* Reject message if there isn't room to queue it */
1704 if (unlikely(sk_rmem_alloc_get(sk) + skb->truesize >= limit)) {
1705 err = TIPC_ERR_OVERLOAD;
1709 /* Enqueue message */
1710 TIPC_SKB_CB(skb)->bytes_read = 0;
1711 __skb_queue_tail(&sk->sk_receive_queue, skb);
1712 skb_set_owner_r(skb, sk);
1714 sk->sk_data_ready(sk);
1718 if (tipc_msg_reverse(tsk_own_node(tsk), &skb, err))
1719 __skb_queue_tail(xmitq, skb);
1724 * tipc_backlog_rcv - handle incoming message from backlog queue
1728 * Caller must hold socket lock
1732 static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb)
1734 unsigned int truesize = skb->truesize;
1735 struct sk_buff_head xmitq;
1736 u32 dnode, selector;
1738 __skb_queue_head_init(&xmitq);
1740 if (likely(filter_rcv(sk, skb, &xmitq))) {
1741 atomic_add(truesize, &tipc_sk(sk)->dupl_rcvcnt);
1745 if (skb_queue_empty(&xmitq))
1748 /* Send response/rejected message */
1749 skb = __skb_dequeue(&xmitq);
1750 dnode = msg_destnode(buf_msg(skb));
1751 selector = msg_origport(buf_msg(skb));
1752 tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector);
1757 * tipc_sk_enqueue - extract all buffers with destination 'dport' from
1758 * inputq and try adding them to socket or backlog queue
1759 * @inputq: list of incoming buffers with potentially different destinations
1760 * @sk: socket where the buffers should be enqueued
1761 * @dport: port number for the socket
1763 * Caller must hold socket lock
1765 static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,
1766 u32 dport, struct sk_buff_head *xmitq)
1768 unsigned long time_limit = jiffies + 2;
1769 struct sk_buff *skb;
1774 while (skb_queue_len(inputq)) {
1775 if (unlikely(time_after_eq(jiffies, time_limit)))
1778 skb = tipc_skb_dequeue(inputq, dport);
1782 /* Add message directly to receive queue if possible */
1783 if (!sock_owned_by_user(sk)) {
1784 filter_rcv(sk, skb, xmitq);
1788 /* Try backlog, compensating for double-counted bytes */
1789 dcnt = &tipc_sk(sk)->dupl_rcvcnt;
1790 if (!sk->sk_backlog.len)
1791 atomic_set(dcnt, 0);
1792 lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt);
1793 if (likely(!sk_add_backlog(sk, skb, lim)))
1796 /* Overload => reject message back to sender */
1797 onode = tipc_own_addr(sock_net(sk));
1798 if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD))
1799 __skb_queue_tail(xmitq, skb);
1805 * tipc_sk_rcv - handle a chain of incoming buffers
1806 * @inputq: buffer list containing the buffers
1807 * Consumes all buffers in list until inputq is empty
1808 * Note: may be called in multiple threads referring to the same queue
1810 void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)
1812 struct sk_buff_head xmitq;
1813 u32 dnode, dport = 0;
1815 struct tipc_sock *tsk;
1817 struct sk_buff *skb;
1819 __skb_queue_head_init(&xmitq);
1820 while (skb_queue_len(inputq)) {
1821 dport = tipc_skb_peek_port(inputq, dport);
1822 tsk = tipc_sk_lookup(net, dport);
1826 if (likely(spin_trylock_bh(&sk->sk_lock.slock))) {
1827 tipc_sk_enqueue(inputq, sk, dport, &xmitq);
1828 spin_unlock_bh(&sk->sk_lock.slock);
1830 /* Send pending response/rejected messages, if any */
1831 while ((skb = __skb_dequeue(&xmitq))) {
1832 dnode = msg_destnode(buf_msg(skb));
1833 tipc_node_xmit_skb(net, skb, dnode, dport);
1839 /* No destination socket => dequeue skb if still there */
1840 skb = tipc_skb_dequeue(inputq, dport);
1844 /* Try secondary lookup if unresolved named message */
1845 err = TIPC_ERR_NO_PORT;
1846 if (tipc_msg_lookup_dest(net, skb, &err))
1849 /* Prepare for message rejection */
1850 if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err))
1853 dnode = msg_destnode(buf_msg(skb));
1854 tipc_node_xmit_skb(net, skb, dnode, dport);
1858 static int tipc_wait_for_connect(struct socket *sock, long *timeo_p)
1860 DEFINE_WAIT_FUNC(wait, woken_wake_function);
1861 struct sock *sk = sock->sk;
1865 int err = sock_error(sk);
1870 if (signal_pending(current))
1871 return sock_intr_errno(*timeo_p);
1873 add_wait_queue(sk_sleep(sk), &wait);
1874 done = sk_wait_event(sk, timeo_p,
1875 sk->sk_state != TIPC_CONNECTING, &wait);
1876 remove_wait_queue(sk_sleep(sk), &wait);
1882 * tipc_connect - establish a connection to another TIPC port
1883 * @sock: socket structure
1884 * @dest: socket address for destination port
1885 * @destlen: size of socket address data structure
1886 * @flags: file-related flags associated with socket
1888 * Returns 0 on success, errno otherwise
1890 static int tipc_connect(struct socket *sock, struct sockaddr *dest,
1891 int destlen, int flags)
1893 struct sock *sk = sock->sk;
1894 struct tipc_sock *tsk = tipc_sk(sk);
1895 struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest;
1896 struct msghdr m = {NULL,};
1897 long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout;
1903 /* DGRAM/RDM connect(), just save the destaddr */
1904 if (tipc_sk_type_connectionless(sk)) {
1905 if (dst->family == AF_UNSPEC) {
1906 memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc));
1907 } else if (destlen != sizeof(struct sockaddr_tipc)) {
1910 memcpy(&tsk->peer, dest, destlen);
1916 * Reject connection attempt using multicast address
1918 * Note: send_msg() validates the rest of the address fields,
1919 * so there's no need to do it here
1921 if (dst->addrtype == TIPC_ADDR_MCAST) {
1926 previous = sk->sk_state;
1928 switch (sk->sk_state) {
1930 /* Send a 'SYN-' to destination */
1932 m.msg_namelen = destlen;
1934 /* If connect is in non-blocking case, set MSG_DONTWAIT to
1935 * indicate send_msg() is never blocked.
1938 m.msg_flags = MSG_DONTWAIT;
1940 res = __tipc_sendmsg(sock, &m, 0);
1941 if ((res < 0) && (res != -EWOULDBLOCK))
1944 /* Just entered TIPC_CONNECTING state; the only
1945 * difference is that return value in non-blocking
1946 * case is EINPROGRESS, rather than EALREADY.
1950 case TIPC_CONNECTING:
1952 if (previous == TIPC_CONNECTING)
1956 timeout = msecs_to_jiffies(timeout);
1957 /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
1958 res = tipc_wait_for_connect(sock, &timeout);
1960 case TIPC_ESTABLISHED:
1973 * tipc_listen - allow socket to listen for incoming connections
1974 * @sock: socket structure
1977 * Returns 0 on success, errno otherwise
1979 static int tipc_listen(struct socket *sock, int len)
1981 struct sock *sk = sock->sk;
1985 res = tipc_set_sk_state(sk, TIPC_LISTEN);
1991 static int tipc_wait_for_accept(struct socket *sock, long timeo)
1993 struct sock *sk = sock->sk;
1997 /* True wake-one mechanism for incoming connections: only
1998 * one process gets woken up, not the 'whole herd'.
1999 * Since we do not 'race & poll' for established sockets
2000 * anymore, the common case will execute the loop only once.
2003 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
2004 TASK_INTERRUPTIBLE);
2005 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
2007 timeo = schedule_timeout(timeo);
2011 if (!skb_queue_empty(&sk->sk_receive_queue))
2016 err = sock_intr_errno(timeo);
2017 if (signal_pending(current))
2020 finish_wait(sk_sleep(sk), &wait);
2025 * tipc_accept - wait for connection request
2026 * @sock: listening socket
2027 * @newsock: new socket that is to be connected
2028 * @flags: file-related flags associated with socket
2030 * Returns 0 on success, errno otherwise
2032 static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags)
2034 struct sock *new_sk, *sk = sock->sk;
2035 struct sk_buff *buf;
2036 struct tipc_sock *new_tsock;
2037 struct tipc_msg *msg;
2043 if (sk->sk_state != TIPC_LISTEN) {
2047 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
2048 res = tipc_wait_for_accept(sock, timeo);
2052 buf = skb_peek(&sk->sk_receive_queue);
2054 res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, 0);
2057 security_sk_clone(sock->sk, new_sock->sk);
2059 new_sk = new_sock->sk;
2060 new_tsock = tipc_sk(new_sk);
2063 /* we lock on new_sk; but lockdep sees the lock on sk */
2064 lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING);
2067 * Reject any stray messages received by new socket
2068 * before the socket lock was taken (very, very unlikely)
2070 tsk_rej_rx_queue(new_sk);
2072 /* Connect new socket to it's peer */
2073 tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg));
2075 tsk_set_importance(new_tsock, msg_importance(msg));
2076 if (msg_named(msg)) {
2077 new_tsock->conn_type = msg_nametype(msg);
2078 new_tsock->conn_instance = msg_nameinst(msg);
2082 * Respond to 'SYN-' by discarding it & returning 'ACK'-.
2083 * Respond to 'SYN+' by queuing it on new socket.
2085 if (!msg_data_sz(msg)) {
2086 struct msghdr m = {NULL,};
2088 tsk_advance_rx_queue(sk);
2089 __tipc_sendstream(new_sock, &m, 0);
2091 __skb_dequeue(&sk->sk_receive_queue);
2092 __skb_queue_head(&new_sk->sk_receive_queue, buf);
2093 skb_set_owner_r(buf, new_sk);
2095 release_sock(new_sk);
2102 * tipc_shutdown - shutdown socket connection
2103 * @sock: socket structure
2104 * @how: direction to close (must be SHUT_RDWR)
2106 * Terminates connection (if necessary), then purges socket's receive queue.
2108 * Returns 0 on success, errno otherwise
2110 static int tipc_shutdown(struct socket *sock, int how)
2112 struct sock *sk = sock->sk;
2115 if (how != SHUT_RDWR)
2120 __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN);
2121 sk->sk_shutdown = SEND_SHUTDOWN;
2123 if (sk->sk_state == TIPC_DISCONNECTING) {
2124 /* Discard any unreceived messages */
2125 __skb_queue_purge(&sk->sk_receive_queue);
2127 /* Wake up anyone sleeping in poll */
2128 sk->sk_state_change(sk);
2138 static void tipc_sk_timeout(unsigned long data)
2140 struct tipc_sock *tsk = (struct tipc_sock *)data;
2141 struct sock *sk = &tsk->sk;
2142 struct sk_buff *skb = NULL;
2143 u32 peer_port, peer_node;
2144 u32 own_node = tsk_own_node(tsk);
2147 if (!tipc_sk_connected(sk)) {
2151 peer_port = tsk_peer_port(tsk);
2152 peer_node = tsk_peer_node(tsk);
2154 if (tsk->probe_unacked) {
2155 if (!sock_owned_by_user(sk)) {
2156 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
2157 tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk),
2158 tsk_peer_port(tsk));
2159 sk->sk_state_change(sk);
2161 /* Try again later */
2162 sk_reset_timer(sk, &sk->sk_timer, (HZ / 20));
2169 skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE,
2170 INT_H_SIZE, 0, peer_node, own_node,
2171 peer_port, tsk->portid, TIPC_OK);
2172 tsk->probe_unacked = true;
2173 sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL);
2176 tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid);
2181 static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
2182 struct tipc_name_seq const *seq)
2184 struct sock *sk = &tsk->sk;
2185 struct net *net = sock_net(sk);
2186 struct publication *publ;
2189 if (tipc_sk_connected(sk))
2191 key = tsk->portid + tsk->pub_count + 1;
2192 if (key == tsk->portid)
2195 publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper,
2196 scope, tsk->portid, key);
2197 if (unlikely(!publ))
2200 list_add(&publ->pport_list, &tsk->publications);
2206 static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
2207 struct tipc_name_seq const *seq)
2209 struct net *net = sock_net(&tsk->sk);
2210 struct publication *publ;
2211 struct publication *safe;
2214 list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) {
2216 if (publ->scope != scope)
2218 if (publ->type != seq->type)
2220 if (publ->lower != seq->lower)
2222 if (publ->upper != seq->upper)
2224 tipc_nametbl_withdraw(net, publ->type, publ->lower,
2225 publ->ref, publ->key);
2229 tipc_nametbl_withdraw(net, publ->type, publ->lower,
2230 publ->ref, publ->key);
2233 if (list_empty(&tsk->publications))
2238 /* tipc_sk_reinit: set non-zero address in all existing sockets
2239 * when we go from standalone to network mode.
2241 void tipc_sk_reinit(struct net *net)
2243 struct tipc_net *tn = net_generic(net, tipc_net_id);
2244 struct rhashtable_iter iter;
2245 struct tipc_sock *tsk;
2246 struct tipc_msg *msg;
2248 rhashtable_walk_enter(&tn->sk_rht, &iter);
2251 tsk = ERR_PTR(rhashtable_walk_start(&iter));
2255 while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) {
2256 spin_lock_bh(&tsk->sk.sk_lock.slock);
2258 msg_set_prevnode(msg, tn->own_addr);
2259 msg_set_orignode(msg, tn->own_addr);
2260 spin_unlock_bh(&tsk->sk.sk_lock.slock);
2263 rhashtable_walk_stop(&iter);
2264 } while (tsk == ERR_PTR(-EAGAIN));
2267 static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid)
2269 struct tipc_net *tn = net_generic(net, tipc_net_id);
2270 struct tipc_sock *tsk;
2273 tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params);
2275 sock_hold(&tsk->sk);
2281 static int tipc_sk_insert(struct tipc_sock *tsk)
2283 struct sock *sk = &tsk->sk;
2284 struct net *net = sock_net(sk);
2285 struct tipc_net *tn = net_generic(net, tipc_net_id);
2286 u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1;
2287 u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT;
2289 while (remaining--) {
2291 if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT))
2292 portid = TIPC_MIN_PORT;
2293 tsk->portid = portid;
2294 sock_hold(&tsk->sk);
2295 if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node,
2304 static void tipc_sk_remove(struct tipc_sock *tsk)
2306 struct sock *sk = &tsk->sk;
2307 struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id);
2309 if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) {
2310 WARN_ON(atomic_read(&sk->sk_refcnt) == 1);
2315 static const struct rhashtable_params tsk_rht_params = {
2317 .head_offset = offsetof(struct tipc_sock, node),
2318 .key_offset = offsetof(struct tipc_sock, portid),
2319 .key_len = sizeof(u32), /* portid */
2320 .max_size = 1048576,
2322 .automatic_shrinking = true,
2325 int tipc_sk_rht_init(struct net *net)
2327 struct tipc_net *tn = net_generic(net, tipc_net_id);
2329 return rhashtable_init(&tn->sk_rht, &tsk_rht_params);
2332 void tipc_sk_rht_destroy(struct net *net)
2334 struct tipc_net *tn = net_generic(net, tipc_net_id);
2336 /* Wait for socket readers to complete */
2339 rhashtable_destroy(&tn->sk_rht);
2343 * tipc_setsockopt - set socket option
2344 * @sock: socket structure
2345 * @lvl: option level
2346 * @opt: option identifier
2347 * @ov: pointer to new option value
2348 * @ol: length of option value
2350 * For stream sockets only, accepts and ignores all IPPROTO_TCP options
2351 * (to ease compatibility).
2353 * Returns 0 on success, errno otherwise
2355 static int tipc_setsockopt(struct socket *sock, int lvl, int opt,
2356 char __user *ov, unsigned int ol)
2358 struct sock *sk = sock->sk;
2359 struct tipc_sock *tsk = tipc_sk(sk);
2363 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
2365 if (lvl != SOL_TIPC)
2366 return -ENOPROTOOPT;
2369 case TIPC_IMPORTANCE:
2370 case TIPC_SRC_DROPPABLE:
2371 case TIPC_DEST_DROPPABLE:
2372 case TIPC_CONN_TIMEOUT:
2373 if (ol < sizeof(value))
2375 res = get_user(value, (u32 __user *)ov);
2387 case TIPC_IMPORTANCE:
2388 res = tsk_set_importance(tsk, value);
2390 case TIPC_SRC_DROPPABLE:
2391 if (sock->type != SOCK_STREAM)
2392 tsk_set_unreliable(tsk, value);
2396 case TIPC_DEST_DROPPABLE:
2397 tsk_set_unreturnable(tsk, value);
2399 case TIPC_CONN_TIMEOUT:
2400 tipc_sk(sk)->conn_timeout = value;
2402 case TIPC_MCAST_BROADCAST:
2403 tsk->mc_method.rcast = false;
2404 tsk->mc_method.mandatory = true;
2406 case TIPC_MCAST_REPLICAST:
2407 tsk->mc_method.rcast = true;
2408 tsk->mc_method.mandatory = true;
2420 * tipc_getsockopt - get socket option
2421 * @sock: socket structure
2422 * @lvl: option level
2423 * @opt: option identifier
2424 * @ov: receptacle for option value
2425 * @ol: receptacle for length of option value
2427 * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
2428 * (to ease compatibility).
2430 * Returns 0 on success, errno otherwise
2432 static int tipc_getsockopt(struct socket *sock, int lvl, int opt,
2433 char __user *ov, int __user *ol)
2435 struct sock *sk = sock->sk;
2436 struct tipc_sock *tsk = tipc_sk(sk);
2441 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
2442 return put_user(0, ol);
2443 if (lvl != SOL_TIPC)
2444 return -ENOPROTOOPT;
2445 res = get_user(len, ol);
2452 case TIPC_IMPORTANCE:
2453 value = tsk_importance(tsk);
2455 case TIPC_SRC_DROPPABLE:
2456 value = tsk_unreliable(tsk);
2458 case TIPC_DEST_DROPPABLE:
2459 value = tsk_unreturnable(tsk);
2461 case TIPC_CONN_TIMEOUT:
2462 value = tsk->conn_timeout;
2463 /* no need to set "res", since already 0 at this point */
2465 case TIPC_NODE_RECVQ_DEPTH:
2466 value = 0; /* was tipc_queue_size, now obsolete */
2468 case TIPC_SOCK_RECVQ_DEPTH:
2469 value = skb_queue_len(&sk->sk_receive_queue);
2478 return res; /* "get" failed */
2480 if (len < sizeof(value))
2483 if (copy_to_user(ov, &value, sizeof(value)))
2486 return put_user(sizeof(value), ol);
2489 static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
2491 struct sock *sk = sock->sk;
2492 struct tipc_sioc_ln_req lnr;
2493 void __user *argp = (void __user *)arg;
2496 case SIOCGETLINKNAME:
2497 if (copy_from_user(&lnr, argp, sizeof(lnr)))
2499 if (!tipc_node_get_linkname(sock_net(sk),
2500 lnr.bearer_id & 0xffff, lnr.peer,
2501 lnr.linkname, TIPC_MAX_LINK_NAME)) {
2502 if (copy_to_user(argp, &lnr, sizeof(lnr)))
2506 return -EADDRNOTAVAIL;
2508 return -ENOIOCTLCMD;
2512 /* Protocol switches for the various types of TIPC sockets */
2514 static const struct proto_ops msg_ops = {
2515 .owner = THIS_MODULE,
2517 .release = tipc_release,
2519 .connect = tipc_connect,
2520 .socketpair = sock_no_socketpair,
2521 .accept = sock_no_accept,
2522 .getname = tipc_getname,
2524 .ioctl = tipc_ioctl,
2525 .listen = sock_no_listen,
2526 .shutdown = tipc_shutdown,
2527 .setsockopt = tipc_setsockopt,
2528 .getsockopt = tipc_getsockopt,
2529 .sendmsg = tipc_sendmsg,
2530 .recvmsg = tipc_recvmsg,
2531 .mmap = sock_no_mmap,
2532 .sendpage = sock_no_sendpage
2535 static const struct proto_ops packet_ops = {
2536 .owner = THIS_MODULE,
2538 .release = tipc_release,
2540 .connect = tipc_connect,
2541 .socketpair = sock_no_socketpair,
2542 .accept = tipc_accept,
2543 .getname = tipc_getname,
2545 .ioctl = tipc_ioctl,
2546 .listen = tipc_listen,
2547 .shutdown = tipc_shutdown,
2548 .setsockopt = tipc_setsockopt,
2549 .getsockopt = tipc_getsockopt,
2550 .sendmsg = tipc_send_packet,
2551 .recvmsg = tipc_recvmsg,
2552 .mmap = sock_no_mmap,
2553 .sendpage = sock_no_sendpage
2556 static const struct proto_ops stream_ops = {
2557 .owner = THIS_MODULE,
2559 .release = tipc_release,
2561 .connect = tipc_connect,
2562 .socketpair = sock_no_socketpair,
2563 .accept = tipc_accept,
2564 .getname = tipc_getname,
2566 .ioctl = tipc_ioctl,
2567 .listen = tipc_listen,
2568 .shutdown = tipc_shutdown,
2569 .setsockopt = tipc_setsockopt,
2570 .getsockopt = tipc_getsockopt,
2571 .sendmsg = tipc_sendstream,
2572 .recvmsg = tipc_recv_stream,
2573 .mmap = sock_no_mmap,
2574 .sendpage = sock_no_sendpage
2577 static const struct net_proto_family tipc_family_ops = {
2578 .owner = THIS_MODULE,
2580 .create = tipc_sk_create
2583 static struct proto tipc_proto = {
2585 .owner = THIS_MODULE,
2586 .obj_size = sizeof(struct tipc_sock),
2587 .sysctl_rmem = sysctl_tipc_rmem
2591 * tipc_socket_init - initialize TIPC socket interface
2593 * Returns 0 on success, errno otherwise
2595 int tipc_socket_init(void)
2599 res = proto_register(&tipc_proto, 1);
2601 pr_err("Failed to register TIPC protocol type\n");
2605 res = sock_register(&tipc_family_ops);
2607 pr_err("Failed to register TIPC socket type\n");
2608 proto_unregister(&tipc_proto);
2616 * tipc_socket_stop - stop TIPC socket interface
2618 void tipc_socket_stop(void)
2620 sock_unregister(tipc_family_ops.family);
2621 proto_unregister(&tipc_proto);
2624 /* Caller should hold socket lock for the passed tipc socket. */
2625 static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk)
2629 struct nlattr *nest;
2631 peer_node = tsk_peer_node(tsk);
2632 peer_port = tsk_peer_port(tsk);
2634 nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON);
2636 if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node))
2638 if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port))
2641 if (tsk->conn_type != 0) {
2642 if (nla_put_flag(skb, TIPC_NLA_CON_FLAG))
2644 if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type))
2646 if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance))
2649 nla_nest_end(skb, nest);
2654 nla_nest_cancel(skb, nest);
2659 /* Caller should hold socket lock for the passed tipc socket. */
2660 static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb,
2661 struct tipc_sock *tsk)
2665 struct nlattr *attrs;
2666 struct net *net = sock_net(skb->sk);
2667 struct tipc_net *tn = net_generic(net, tipc_net_id);
2668 struct sock *sk = &tsk->sk;
2670 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2671 &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET);
2675 attrs = nla_nest_start(skb, TIPC_NLA_SOCK);
2677 goto genlmsg_cancel;
2678 if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid))
2679 goto attr_msg_cancel;
2680 if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr))
2681 goto attr_msg_cancel;
2683 if (tipc_sk_connected(sk)) {
2684 err = __tipc_nl_add_sk_con(skb, tsk);
2686 goto attr_msg_cancel;
2687 } else if (!list_empty(&tsk->publications)) {
2688 if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL))
2689 goto attr_msg_cancel;
2691 nla_nest_end(skb, attrs);
2692 genlmsg_end(skb, hdr);
2697 nla_nest_cancel(skb, attrs);
2699 genlmsg_cancel(skb, hdr);
2704 int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb)
2707 struct tipc_sock *tsk;
2708 const struct bucket_table *tbl;
2709 struct rhash_head *pos;
2710 struct net *net = sock_net(skb->sk);
2711 struct tipc_net *tn = net_generic(net, tipc_net_id);
2712 u32 tbl_id = cb->args[0];
2713 u32 prev_portid = cb->args[1];
2716 tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht);
2717 for (; tbl_id < tbl->size; tbl_id++) {
2718 rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) {
2719 spin_lock_bh(&tsk->sk.sk_lock.slock);
2720 if (prev_portid && prev_portid != tsk->portid) {
2721 spin_unlock_bh(&tsk->sk.sk_lock.slock);
2725 err = __tipc_nl_add_sk(skb, cb, tsk);
2727 prev_portid = tsk->portid;
2728 spin_unlock_bh(&tsk->sk.sk_lock.slock);
2732 spin_unlock_bh(&tsk->sk.sk_lock.slock);
2737 cb->args[0] = tbl_id;
2738 cb->args[1] = prev_portid;
2743 /* Caller should hold socket lock for the passed tipc socket. */
2744 static int __tipc_nl_add_sk_publ(struct sk_buff *skb,
2745 struct netlink_callback *cb,
2746 struct publication *publ)
2749 struct nlattr *attrs;
2751 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2752 &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET);
2756 attrs = nla_nest_start(skb, TIPC_NLA_PUBL);
2758 goto genlmsg_cancel;
2760 if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key))
2761 goto attr_msg_cancel;
2762 if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type))
2763 goto attr_msg_cancel;
2764 if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower))
2765 goto attr_msg_cancel;
2766 if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper))
2767 goto attr_msg_cancel;
2769 nla_nest_end(skb, attrs);
2770 genlmsg_end(skb, hdr);
2775 nla_nest_cancel(skb, attrs);
2777 genlmsg_cancel(skb, hdr);
2782 /* Caller should hold socket lock for the passed tipc socket. */
2783 static int __tipc_nl_list_sk_publ(struct sk_buff *skb,
2784 struct netlink_callback *cb,
2785 struct tipc_sock *tsk, u32 *last_publ)
2788 struct publication *p;
2791 list_for_each_entry(p, &tsk->publications, pport_list) {
2792 if (p->key == *last_publ)
2795 if (p->key != *last_publ) {
2796 /* We never set seq or call nl_dump_check_consistent()
2797 * this means that setting prev_seq here will cause the
2798 * consistence check to fail in the netlink callback
2799 * handler. Resulting in the last NLMSG_DONE message
2800 * having the NLM_F_DUMP_INTR flag set.
2807 p = list_first_entry(&tsk->publications, struct publication,
2811 list_for_each_entry_from(p, &tsk->publications, pport_list) {
2812 err = __tipc_nl_add_sk_publ(skb, cb, p);
2814 *last_publ = p->key;
2823 int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb)
2826 u32 tsk_portid = cb->args[0];
2827 u32 last_publ = cb->args[1];
2828 u32 done = cb->args[2];
2829 struct net *net = sock_net(skb->sk);
2830 struct tipc_sock *tsk;
2833 struct nlattr **attrs;
2834 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
2836 err = tipc_nlmsg_parse(cb->nlh, &attrs);
2840 if (!attrs[TIPC_NLA_SOCK])
2843 err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX,
2844 attrs[TIPC_NLA_SOCK],
2845 tipc_nl_sock_policy);
2849 if (!sock[TIPC_NLA_SOCK_REF])
2852 tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
2858 tsk = tipc_sk_lookup(net, tsk_portid);
2862 lock_sock(&tsk->sk);
2863 err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ);
2866 release_sock(&tsk->sk);
2869 cb->args[0] = tsk_portid;
2870 cb->args[1] = last_publ;