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
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"
50 #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
51 #define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */
52 #define TIPC_FWD_MSG 1
53 #define TIPC_MAX_PORT 0xffffffff
54 #define TIPC_MIN_PORT 1
55 #define TIPC_ACK_RATE 4 /* ACK at 1/4 of of rcv window size */
58 TIPC_LISTEN = TCP_LISTEN,
59 TIPC_ESTABLISHED = TCP_ESTABLISHED,
60 TIPC_OPEN = TCP_CLOSE,
61 TIPC_DISCONNECTING = TCP_CLOSE_WAIT,
62 TIPC_CONNECTING = TCP_SYN_SENT,
65 struct sockaddr_pair {
66 struct sockaddr_tipc sock;
67 struct sockaddr_tipc member;
71 * struct tipc_sock - TIPC socket structure
72 * @sk: socket - interacts with 'port' and with user via the socket API
73 * @conn_type: TIPC type used when connection was established
74 * @conn_instance: TIPC instance used when connection was established
75 * @published: non-zero if port has one or more associated names
76 * @max_pkt: maximum packet size "hint" used when building messages sent by port
77 * @portid: unique port identity in TIPC socket hash table
78 * @phdr: preformatted message header used when sending messages
79 * #cong_links: list of congested links
80 * @publications: list of publications for port
81 * @blocking_link: address of the congested link we are currently sleeping on
82 * @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;
106 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 kfree_skb(__skb_dequeue(&sk->sk_receive_queue));
240 /* tipc_sk_respond() : send response message back to sender
242 static void tipc_sk_respond(struct sock *sk, struct sk_buff *skb, int err)
246 u32 onode = tipc_own_addr(sock_net(sk));
248 if (!tipc_msg_reverse(onode, &skb, err))
251 dnode = msg_destnode(buf_msg(skb));
252 selector = msg_origport(buf_msg(skb));
253 tipc_node_xmit_skb(sock_net(sk), skb, dnode, selector);
257 * tsk_rej_rx_queue - reject all buffers in socket receive queue
259 * Caller must hold socket lock
261 static void tsk_rej_rx_queue(struct sock *sk)
265 while ((skb = __skb_dequeue(&sk->sk_receive_queue)))
266 tipc_sk_respond(sk, skb, TIPC_ERR_NO_PORT);
269 static bool tipc_sk_connected(struct sock *sk)
271 return sk->sk_state == TIPC_ESTABLISHED;
274 /* tipc_sk_type_connectionless - check if the socket is datagram socket
277 * Returns true if connection less, false otherwise
279 static bool tipc_sk_type_connectionless(struct sock *sk)
281 return sk->sk_type == SOCK_RDM || sk->sk_type == SOCK_DGRAM;
284 /* tsk_peer_msg - verify if message was sent by connected port's peer
286 * Handles cases where the node's network address has changed from
287 * the default of <0.0.0> to its configured setting.
289 static bool tsk_peer_msg(struct tipc_sock *tsk, struct tipc_msg *msg)
291 struct sock *sk = &tsk->sk;
292 struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id);
293 u32 peer_port = tsk_peer_port(tsk);
297 if (unlikely(!tipc_sk_connected(sk)))
300 if (unlikely(msg_origport(msg) != peer_port))
303 orig_node = msg_orignode(msg);
304 peer_node = tsk_peer_node(tsk);
306 if (likely(orig_node == peer_node))
309 if (!orig_node && (peer_node == tn->own_addr))
312 if (!peer_node && (orig_node == tn->own_addr))
318 /* tipc_set_sk_state - set the sk_state of the socket
321 * Caller must hold socket lock
323 * Returns 0 on success, errno otherwise
325 static int tipc_set_sk_state(struct sock *sk, int state)
327 int oldsk_state = sk->sk_state;
335 case TIPC_CONNECTING:
336 if (oldsk_state == TIPC_OPEN)
339 case TIPC_ESTABLISHED:
340 if (oldsk_state == TIPC_CONNECTING ||
341 oldsk_state == TIPC_OPEN)
344 case TIPC_DISCONNECTING:
345 if (oldsk_state == TIPC_CONNECTING ||
346 oldsk_state == TIPC_ESTABLISHED)
352 sk->sk_state = state;
357 static int tipc_sk_sock_err(struct socket *sock, long *timeout)
359 struct sock *sk = sock->sk;
360 int err = sock_error(sk);
361 int typ = sock->type;
365 if (typ == SOCK_STREAM || typ == SOCK_SEQPACKET) {
366 if (sk->sk_state == TIPC_DISCONNECTING)
368 else if (!tipc_sk_connected(sk))
373 if (signal_pending(current))
374 return sock_intr_errno(*timeout);
379 #define tipc_wait_for_cond(sock_, timeo_, condition_) \
384 while ((rc_ = !(condition_))) { \
385 DEFINE_WAIT_FUNC(wait_, woken_wake_function); \
387 rc_ = tipc_sk_sock_err((sock_), timeo_); \
390 prepare_to_wait(sk_sleep(sk_), &wait_, TASK_INTERRUPTIBLE); \
392 *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \
393 sched_annotate_sleep(); \
395 remove_wait_queue(sk_sleep(sk_), &wait_); \
401 * tipc_sk_create - create a TIPC socket
402 * @net: network namespace (must be default network)
403 * @sock: pre-allocated socket structure
404 * @protocol: protocol indicator (must be 0)
405 * @kern: caused by kernel or by userspace?
407 * This routine creates additional data structures used by the TIPC socket,
408 * initializes them, and links them together.
410 * Returns 0 on success, errno otherwise
412 static int tipc_sk_create(struct net *net, struct socket *sock,
413 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);
450 tn = net_generic(sock_net(sk), tipc_net_id);
452 /* Finish initializing socket data structures */
454 sock_init_data(sock, sk);
455 tipc_set_sk_state(sk, TIPC_OPEN);
456 if (tipc_sk_insert(tsk)) {
457 pr_warn("Socket create failed; port number exhausted\n");
461 /* Ensure tsk is visible before we read own_addr. */
464 tipc_msg_init(tn->own_addr, msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG,
467 msg_set_origport(msg, tsk->portid);
468 timer_setup(&sk->sk_timer, tipc_sk_timeout, 0);
470 sk->sk_backlog_rcv = tipc_sk_backlog_rcv;
471 sk->sk_rcvbuf = sysctl_tipc_rmem[1];
472 sk->sk_data_ready = tipc_data_ready;
473 sk->sk_write_space = tipc_write_space;
474 sk->sk_destruct = tipc_sock_destruct;
475 tsk->conn_timeout = CONN_TIMEOUT_DEFAULT;
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);
491 static void tipc_sk_callback(struct rcu_head *head)
493 struct tipc_sock *tsk = container_of(head, struct tipc_sock, rcu);
498 /* Caller should hold socket lock for the socket. */
499 static void __tipc_shutdown(struct socket *sock, int error)
501 struct sock *sk = sock->sk;
502 struct tipc_sock *tsk = tipc_sk(sk);
503 struct net *net = sock_net(sk);
504 long timeout = CONN_TIMEOUT_DEFAULT;
505 u32 dnode = tsk_peer_node(tsk);
508 /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */
509 tipc_wait_for_cond(sock, &timeout, (!tsk->cong_link_cnt &&
510 !tsk_conn_cong(tsk)));
512 /* Reject all unreceived messages, except on an active connection
513 * (which disconnects locally & sends a 'FIN+' to peer).
515 while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) {
516 if (TIPC_SKB_CB(skb)->bytes_read) {
520 if (!tipc_sk_type_connectionless(sk) &&
521 sk->sk_state != TIPC_DISCONNECTING) {
522 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
523 tipc_node_remove_conn(net, dnode, tsk->portid);
525 tipc_sk_respond(sk, skb, error);
528 if (tipc_sk_type_connectionless(sk))
531 if (sk->sk_state != TIPC_DISCONNECTING) {
532 skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
533 TIPC_CONN_MSG, SHORT_H_SIZE, 0, dnode,
534 tsk_own_node(tsk), tsk_peer_port(tsk),
537 tipc_node_xmit_skb(net, skb, dnode, tsk->portid);
538 tipc_node_remove_conn(net, dnode, tsk->portid);
539 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
544 * tipc_release - destroy a TIPC socket
545 * @sock: socket to destroy
547 * This routine cleans up any messages that are still queued on the socket.
548 * For DGRAM and RDM socket types, all queued messages are rejected.
549 * For SEQPACKET and STREAM socket types, the first message is rejected
550 * and any others are discarded. (If the first message on a STREAM socket
551 * is partially-read, it is discarded and the next one is rejected instead.)
553 * NOTE: Rejected messages are not necessarily returned to the sender! They
554 * are returned or discarded according to the "destination droppable" setting
555 * specified for the message by the sender.
557 * Returns 0 on success, errno otherwise
559 static int tipc_release(struct socket *sock)
561 struct sock *sk = sock->sk;
562 struct tipc_sock *tsk;
565 * Exit if socket isn't fully initialized (occurs when a failed accept()
566 * releases a pre-allocated child socket that was never used)
574 __tipc_shutdown(sock, TIPC_ERR_NO_PORT);
575 sk->sk_shutdown = SHUTDOWN_MASK;
577 tipc_sk_withdraw(tsk, 0, NULL);
578 sk_stop_timer(sk, &sk->sk_timer);
581 /* Reject any messages that accumulated in backlog queue */
583 tipc_dest_list_purge(&tsk->cong_links);
584 tsk->cong_link_cnt = 0;
585 call_rcu(&tsk->rcu, tipc_sk_callback);
592 * tipc_bind - associate or disassocate TIPC name(s) with a socket
593 * @sock: socket structure
594 * @uaddr: socket address describing name(s) and desired operation
595 * @uaddr_len: size of socket address data structure
597 * Name and name sequence binding is indicated using a positive scope value;
598 * a negative scope value unbinds the specified name. Specifying no name
599 * (i.e. a socket address length of 0) unbinds all names from the socket.
601 * Returns 0 on success, errno otherwise
603 * NOTE: This routine doesn't need to take the socket lock since it doesn't
604 * access any non-constant socket information.
606 static int tipc_bind(struct socket *sock, struct sockaddr *uaddr,
609 struct sock *sk = sock->sk;
610 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
611 struct tipc_sock *tsk = tipc_sk(sk);
615 if (unlikely(!uaddr_len)) {
616 res = tipc_sk_withdraw(tsk, 0, NULL);
623 if (uaddr_len < sizeof(struct sockaddr_tipc)) {
627 if (addr->family != AF_TIPC) {
632 if (addr->addrtype == TIPC_ADDR_NAME)
633 addr->addr.nameseq.upper = addr->addr.nameseq.lower;
634 else if (addr->addrtype != TIPC_ADDR_NAMESEQ) {
639 if ((addr->addr.nameseq.type < TIPC_RESERVED_TYPES) &&
640 (addr->addr.nameseq.type != TIPC_TOP_SRV) &&
641 (addr->addr.nameseq.type != TIPC_CFG_SRV)) {
646 res = (addr->scope > 0) ?
647 tipc_sk_publish(tsk, addr->scope, &addr->addr.nameseq) :
648 tipc_sk_withdraw(tsk, -addr->scope, &addr->addr.nameseq);
655 * tipc_getname - get port ID of socket or peer socket
656 * @sock: socket structure
657 * @uaddr: area for returned socket address
658 * @uaddr_len: area for returned length of socket address
659 * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID
661 * Returns 0 on success, errno otherwise
663 * NOTE: This routine doesn't need to take the socket lock since it only
664 * accesses socket information that is unchanging (or which changes in
665 * a completely predictable manner).
667 static int tipc_getname(struct socket *sock, struct sockaddr *uaddr,
668 int *uaddr_len, int peer)
670 struct sockaddr_tipc *addr = (struct sockaddr_tipc *)uaddr;
671 struct sock *sk = sock->sk;
672 struct tipc_sock *tsk = tipc_sk(sk);
673 struct tipc_net *tn = net_generic(sock_net(sock->sk), tipc_net_id);
675 memset(addr, 0, sizeof(*addr));
677 if ((!tipc_sk_connected(sk)) &&
678 ((peer != 2) || (sk->sk_state != TIPC_DISCONNECTING)))
680 addr->addr.id.ref = tsk_peer_port(tsk);
681 addr->addr.id.node = tsk_peer_node(tsk);
683 addr->addr.id.ref = tsk->portid;
684 addr->addr.id.node = tn->own_addr;
687 *uaddr_len = sizeof(*addr);
688 addr->addrtype = TIPC_ADDR_ID;
689 addr->family = AF_TIPC;
691 addr->addr.name.domain = 0;
697 * tipc_poll - read and possibly block on pollmask
698 * @file: file structure associated with the socket
699 * @sock: socket for which to calculate the poll bits
702 * Returns pollmask value
705 * It appears that the usual socket locking mechanisms are not useful here
706 * since the pollmask info is potentially out-of-date the moment this routine
707 * exits. TCP and other protocols seem to rely on higher level poll routines
708 * to handle any preventable race conditions, so TIPC will do the same ...
710 * IMPORTANT: The fact that a read or write operation is indicated does NOT
711 * imply that the operation will succeed, merely that it should be performed
712 * and will not block.
714 static __poll_t tipc_poll(struct file *file, struct socket *sock,
717 struct sock *sk = sock->sk;
718 struct tipc_sock *tsk = tipc_sk(sk);
719 __poll_t revents = 0;
721 sock_poll_wait(file, sk_sleep(sk), wait);
723 if (sk->sk_shutdown & RCV_SHUTDOWN)
724 revents |= POLLRDHUP | POLLIN | POLLRDNORM;
725 if (sk->sk_shutdown == SHUTDOWN_MASK)
728 switch (sk->sk_state) {
729 case TIPC_ESTABLISHED:
730 case TIPC_CONNECTING:
731 if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk))
735 if (!skb_queue_empty(&sk->sk_receive_queue))
736 revents |= POLLIN | POLLRDNORM;
739 if (tsk->group_is_open && !tsk->cong_link_cnt)
741 if (!tipc_sk_type_connectionless(sk))
743 if (skb_queue_empty(&sk->sk_receive_queue))
745 revents |= POLLIN | POLLRDNORM;
747 case TIPC_DISCONNECTING:
748 revents = POLLIN | POLLRDNORM | POLLHUP;
755 * tipc_sendmcast - send multicast message
756 * @sock: socket structure
757 * @seq: destination address
758 * @msg: message to send
759 * @dlen: length of data to send
760 * @timeout: timeout to wait for wakeup
762 * Called from function tipc_sendmsg(), which has done all sanity checks
763 * Returns the number of bytes sent on success, or errno
765 static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
766 struct msghdr *msg, size_t dlen, long timeout)
768 struct sock *sk = sock->sk;
769 struct tipc_sock *tsk = tipc_sk(sk);
770 struct tipc_msg *hdr = &tsk->phdr;
771 struct net *net = sock_net(sk);
772 int mtu = tipc_bcast_get_mtu(net);
773 struct tipc_mc_method *method = &tsk->mc_method;
774 struct sk_buff_head pkts;
775 struct tipc_nlist dsts;
781 /* Block or return if any destination link is congested */
782 rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt);
786 /* Lookup destination nodes */
787 tipc_nlist_init(&dsts, tipc_own_addr(net));
788 tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower,
790 if (!dsts.local && !dsts.remote)
791 return -EHOSTUNREACH;
793 /* Build message header */
794 msg_set_type(hdr, TIPC_MCAST_MSG);
795 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
796 msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE);
797 msg_set_destport(hdr, 0);
798 msg_set_destnode(hdr, 0);
799 msg_set_nametype(hdr, seq->type);
800 msg_set_namelower(hdr, seq->lower);
801 msg_set_nameupper(hdr, seq->upper);
803 /* Build message as chain of buffers */
804 skb_queue_head_init(&pkts);
805 rc = tipc_msg_build(hdr, msg, 0, dlen, mtu, &pkts);
807 /* Send message if build was successful */
808 if (unlikely(rc == dlen))
809 rc = tipc_mcast_xmit(net, &pkts, method, &dsts,
810 &tsk->cong_link_cnt);
812 tipc_nlist_purge(&dsts);
814 return rc ? rc : dlen;
818 * tipc_send_group_msg - send a message to a member in the group
819 * @net: network namespace
820 * @m: message to send
822 * @dnode: destination node
823 * @dport: destination port
824 * @dlen: total length of message data
826 static int tipc_send_group_msg(struct net *net, struct tipc_sock *tsk,
827 struct msghdr *m, struct tipc_member *mb,
828 u32 dnode, u32 dport, int dlen)
830 u16 bc_snd_nxt = tipc_group_bc_snd_nxt(tsk->group);
831 struct tipc_mc_method *method = &tsk->mc_method;
832 int blks = tsk_blocks(GROUP_H_SIZE + dlen);
833 struct tipc_msg *hdr = &tsk->phdr;
834 struct sk_buff_head pkts;
837 /* Complete message header */
838 msg_set_type(hdr, TIPC_GRP_UCAST_MSG);
839 msg_set_hdr_sz(hdr, GROUP_H_SIZE);
840 msg_set_destport(hdr, dport);
841 msg_set_destnode(hdr, dnode);
842 msg_set_grp_bc_seqno(hdr, bc_snd_nxt);
844 /* Build message as chain of buffers */
845 skb_queue_head_init(&pkts);
846 mtu = tipc_node_get_mtu(net, dnode, tsk->portid);
847 rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
848 if (unlikely(rc != dlen))
852 rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
853 if (unlikely(rc == -ELINKCONG)) {
854 tipc_dest_push(&tsk->cong_links, dnode, 0);
855 tsk->cong_link_cnt++;
858 /* Update send window */
859 tipc_group_update_member(mb, blks);
861 /* A broadcast sent within next EXPIRE period must follow same path */
862 method->rcast = true;
863 method->mandatory = true;
868 * tipc_send_group_unicast - send message to a member in the group
869 * @sock: socket structure
870 * @m: message to send
871 * @dlen: total length of message data
872 * @timeout: timeout to wait for wakeup
874 * Called from function tipc_sendmsg(), which has done all sanity checks
875 * Returns the number of bytes sent on success, or errno
877 static int tipc_send_group_unicast(struct socket *sock, struct msghdr *m,
878 int dlen, long timeout)
880 struct sock *sk = sock->sk;
881 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
882 int blks = tsk_blocks(GROUP_H_SIZE + dlen);
883 struct tipc_sock *tsk = tipc_sk(sk);
884 struct tipc_group *grp = tsk->group;
885 struct net *net = sock_net(sk);
886 struct tipc_member *mb = NULL;
890 node = dest->addr.id.node;
891 port = dest->addr.id.ref;
893 return -EHOSTUNREACH;
895 /* Block or return if destination link or member is congested */
896 rc = tipc_wait_for_cond(sock, &timeout,
897 !tipc_dest_find(&tsk->cong_links, node, 0) &&
898 !tipc_group_cong(grp, node, port, blks, &mb));
903 return -EHOSTUNREACH;
905 rc = tipc_send_group_msg(net, tsk, m, mb, node, port, dlen);
907 return rc ? rc : dlen;
911 * tipc_send_group_anycast - send message to any member with given identity
912 * @sock: socket structure
913 * @m: message to send
914 * @dlen: total length of message data
915 * @timeout: timeout to wait for wakeup
917 * Called from function tipc_sendmsg(), which has done all sanity checks
918 * Returns the number of bytes sent on success, or errno
920 static int tipc_send_group_anycast(struct socket *sock, struct msghdr *m,
921 int dlen, long timeout)
923 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
924 struct sock *sk = sock->sk;
925 struct tipc_sock *tsk = tipc_sk(sk);
926 struct list_head *cong_links = &tsk->cong_links;
927 int blks = tsk_blocks(GROUP_H_SIZE + dlen);
928 struct tipc_group *grp = tsk->group;
929 struct tipc_msg *hdr = &tsk->phdr;
930 struct tipc_member *first = NULL;
931 struct tipc_member *mbr = NULL;
932 struct net *net = sock_net(sk);
933 u32 node, port, exclude;
934 struct list_head dsts;
935 u32 type, inst, scope;
940 INIT_LIST_HEAD(&dsts);
942 type = msg_nametype(hdr);
943 inst = dest->addr.name.name.instance;
944 scope = msg_lookup_scope(hdr);
945 exclude = tipc_group_exclude(grp);
947 while (++lookups < 4) {
950 /* Look for a non-congested destination member, if any */
952 if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts,
953 &dstcnt, exclude, false))
954 return -EHOSTUNREACH;
955 tipc_dest_pop(&dsts, &node, &port);
956 cong = tipc_group_cong(grp, node, port, blks, &mbr);
965 /* Start over if destination was not in member list */
969 if (likely(!cong && !tipc_dest_find(cong_links, node, 0)))
972 /* Block or return if destination link or member is congested */
973 rc = tipc_wait_for_cond(sock, &timeout,
974 !tipc_dest_find(cong_links, node, 0) &&
975 !tipc_group_cong(grp, node, port,
980 /* Send, unless destination disappeared while waiting */
985 if (unlikely(lookups >= 4))
986 return -EHOSTUNREACH;
988 rc = tipc_send_group_msg(net, tsk, m, mbr, node, port, dlen);
990 return rc ? rc : dlen;
994 * tipc_send_group_bcast - send message to all members in communication group
995 * @sk: socket structure
996 * @m: message to send
997 * @dlen: total length of message data
998 * @timeout: timeout to wait for wakeup
1000 * Called from function tipc_sendmsg(), which has done all sanity checks
1001 * Returns the number of bytes sent on success, or errno
1003 static int tipc_send_group_bcast(struct socket *sock, struct msghdr *m,
1004 int dlen, long timeout)
1006 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
1007 struct sock *sk = sock->sk;
1008 struct net *net = sock_net(sk);
1009 struct tipc_sock *tsk = tipc_sk(sk);
1010 struct tipc_group *grp = tsk->group;
1011 struct tipc_nlist *dsts = tipc_group_dests(grp);
1012 struct tipc_mc_method *method = &tsk->mc_method;
1013 bool ack = method->mandatory && method->rcast;
1014 int blks = tsk_blocks(MCAST_H_SIZE + dlen);
1015 struct tipc_msg *hdr = &tsk->phdr;
1016 int mtu = tipc_bcast_get_mtu(net);
1017 struct sk_buff_head pkts;
1018 int rc = -EHOSTUNREACH;
1020 if (!dsts->local && !dsts->remote)
1021 return -EHOSTUNREACH;
1023 /* Block or return if any destination link or member is congested */
1024 rc = tipc_wait_for_cond(sock, &timeout, !tsk->cong_link_cnt &&
1025 !tipc_group_bc_cong(grp, blks));
1029 /* Complete message header */
1031 msg_set_type(hdr, TIPC_GRP_MCAST_MSG);
1032 msg_set_nameinst(hdr, dest->addr.name.name.instance);
1034 msg_set_type(hdr, TIPC_GRP_BCAST_MSG);
1035 msg_set_nameinst(hdr, 0);
1037 msg_set_hdr_sz(hdr, GROUP_H_SIZE);
1038 msg_set_destport(hdr, 0);
1039 msg_set_destnode(hdr, 0);
1040 msg_set_grp_bc_seqno(hdr, tipc_group_bc_snd_nxt(grp));
1042 /* Avoid getting stuck with repeated forced replicasts */
1043 msg_set_grp_bc_ack_req(hdr, ack);
1045 /* Build message as chain of buffers */
1046 skb_queue_head_init(&pkts);
1047 rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
1048 if (unlikely(rc != dlen))
1052 rc = tipc_mcast_xmit(net, &pkts, method, dsts, &tsk->cong_link_cnt);
1056 /* Update broadcast sequence number and send windows */
1057 tipc_group_update_bc_members(tsk->group, blks, ack);
1059 /* Broadcast link is now free to choose method for next broadcast */
1060 method->mandatory = false;
1061 method->expires = jiffies;
1067 * tipc_send_group_mcast - send message to all members with given identity
1068 * @sock: socket structure
1069 * @m: message to send
1070 * @dlen: total length of message data
1071 * @timeout: timeout to wait for wakeup
1073 * Called from function tipc_sendmsg(), which has done all sanity checks
1074 * Returns the number of bytes sent on success, or errno
1076 static int tipc_send_group_mcast(struct socket *sock, struct msghdr *m,
1077 int dlen, long timeout)
1079 struct sock *sk = sock->sk;
1080 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
1081 struct tipc_sock *tsk = tipc_sk(sk);
1082 struct tipc_group *grp = tsk->group;
1083 struct tipc_msg *hdr = &tsk->phdr;
1084 struct net *net = sock_net(sk);
1085 u32 type, inst, scope, exclude;
1086 struct list_head dsts;
1089 INIT_LIST_HEAD(&dsts);
1091 type = msg_nametype(hdr);
1092 inst = dest->addr.name.name.instance;
1093 scope = msg_lookup_scope(hdr);
1094 exclude = tipc_group_exclude(grp);
1096 if (!tipc_nametbl_lookup(net, type, inst, scope, &dsts,
1097 &dstcnt, exclude, true))
1098 return -EHOSTUNREACH;
1101 tipc_dest_pop(&dsts, &dest->addr.id.node, &dest->addr.id.ref);
1102 return tipc_send_group_unicast(sock, m, dlen, timeout);
1105 tipc_dest_list_purge(&dsts);
1106 return tipc_send_group_bcast(sock, m, dlen, timeout);
1110 * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets
1111 * @arrvq: queue with arriving messages, to be cloned after destination lookup
1112 * @inputq: queue with cloned messages, delivered to socket after dest lookup
1114 * Multi-threaded: parallel calls with reference to same queues may occur
1116 void tipc_sk_mcast_rcv(struct net *net, struct sk_buff_head *arrvq,
1117 struct sk_buff_head *inputq)
1119 u32 self = tipc_own_addr(net);
1120 u32 type, lower, upper, scope;
1121 struct sk_buff *skb, *_skb;
1122 u32 portid, oport, onode;
1123 struct sk_buff_head tmpq;
1124 struct list_head dports;
1125 struct tipc_msg *hdr;
1126 int user, mtyp, hlen;
1129 __skb_queue_head_init(&tmpq);
1130 INIT_LIST_HEAD(&dports);
1132 skb = tipc_skb_peek(arrvq, &inputq->lock);
1133 for (; skb; skb = tipc_skb_peek(arrvq, &inputq->lock)) {
1135 user = msg_user(hdr);
1136 mtyp = msg_type(hdr);
1137 hlen = skb_headroom(skb) + msg_hdr_sz(hdr);
1138 oport = msg_origport(hdr);
1139 onode = msg_orignode(hdr);
1140 type = msg_nametype(hdr);
1142 if (mtyp == TIPC_GRP_UCAST_MSG || user == GROUP_PROTOCOL) {
1143 spin_lock_bh(&inputq->lock);
1144 if (skb_peek(arrvq) == skb) {
1145 __skb_dequeue(arrvq);
1146 __skb_queue_tail(inputq, skb);
1149 spin_unlock_bh(&inputq->lock);
1153 /* Group messages require exact scope match */
1154 if (msg_in_group(hdr)) {
1157 scope = msg_lookup_scope(hdr);
1160 /* TIPC_NODE_SCOPE means "any scope" in this context */
1162 scope = TIPC_NODE_SCOPE;
1164 scope = TIPC_CLUSTER_SCOPE;
1166 lower = msg_namelower(hdr);
1167 upper = msg_nameupper(hdr);
1170 /* Create destination port list: */
1171 tipc_nametbl_mc_lookup(net, type, lower, upper,
1172 scope, exact, &dports);
1174 /* Clone message per destination */
1175 while (tipc_dest_pop(&dports, NULL, &portid)) {
1176 _skb = __pskb_copy(skb, hlen, GFP_ATOMIC);
1178 msg_set_destport(buf_msg(_skb), portid);
1179 __skb_queue_tail(&tmpq, _skb);
1182 pr_warn("Failed to clone mcast rcv buffer\n");
1184 /* Append to inputq if not already done by other thread */
1185 spin_lock_bh(&inputq->lock);
1186 if (skb_peek(arrvq) == skb) {
1187 skb_queue_splice_tail_init(&tmpq, inputq);
1188 kfree_skb(__skb_dequeue(arrvq));
1190 spin_unlock_bh(&inputq->lock);
1191 __skb_queue_purge(&tmpq);
1194 tipc_sk_rcv(net, inputq);
1198 * tipc_sk_conn_proto_rcv - receive a connection mng protocol message
1199 * @tsk: receiving socket
1200 * @skb: pointer to message buffer.
1202 static void tipc_sk_conn_proto_rcv(struct tipc_sock *tsk, struct sk_buff *skb,
1203 struct sk_buff_head *xmitq)
1205 struct tipc_msg *hdr = buf_msg(skb);
1206 u32 onode = tsk_own_node(tsk);
1207 struct sock *sk = &tsk->sk;
1208 int mtyp = msg_type(hdr);
1211 /* Ignore if connection cannot be validated: */
1212 if (!tsk_peer_msg(tsk, hdr))
1215 if (unlikely(msg_errcode(hdr))) {
1216 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
1217 tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk),
1218 tsk_peer_port(tsk));
1219 sk->sk_state_change(sk);
1223 tsk->probe_unacked = false;
1225 if (mtyp == CONN_PROBE) {
1226 msg_set_type(hdr, CONN_PROBE_REPLY);
1227 if (tipc_msg_reverse(onode, &skb, TIPC_OK))
1228 __skb_queue_tail(xmitq, skb);
1230 } else if (mtyp == CONN_ACK) {
1231 conn_cong = tsk_conn_cong(tsk);
1232 tsk->snt_unacked -= msg_conn_ack(hdr);
1233 if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
1234 tsk->snd_win = msg_adv_win(hdr);
1236 sk->sk_write_space(sk);
1237 } else if (mtyp != CONN_PROBE_REPLY) {
1238 pr_warn("Received unknown CONN_PROTO msg\n");
1245 * tipc_sendmsg - send message in connectionless manner
1246 * @sock: socket structure
1247 * @m: message to send
1248 * @dsz: amount of user data to be sent
1250 * Message must have an destination specified explicitly.
1251 * Used for SOCK_RDM and SOCK_DGRAM messages,
1252 * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
1253 * (Note: 'SYN+' is prohibited on SOCK_STREAM.)
1255 * Returns the number of bytes sent on success, or errno otherwise
1257 static int tipc_sendmsg(struct socket *sock,
1258 struct msghdr *m, size_t dsz)
1260 struct sock *sk = sock->sk;
1264 ret = __tipc_sendmsg(sock, m, dsz);
1270 static int __tipc_sendmsg(struct socket *sock, struct msghdr *m, size_t dlen)
1272 struct sock *sk = sock->sk;
1273 struct net *net = sock_net(sk);
1274 struct tipc_sock *tsk = tipc_sk(sk);
1275 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
1276 long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
1277 struct list_head *clinks = &tsk->cong_links;
1278 bool syn = !tipc_sk_type_connectionless(sk);
1279 struct tipc_group *grp = tsk->group;
1280 struct tipc_msg *hdr = &tsk->phdr;
1281 struct tipc_name_seq *seq;
1282 struct sk_buff_head pkts;
1283 u32 type, inst, domain;
1287 if (unlikely(dlen > TIPC_MAX_USER_MSG_SIZE))
1291 if (unlikely(m->msg_namelen < sizeof(*dest)))
1293 if (unlikely(dest->family != AF_TIPC))
1299 return tipc_send_group_bcast(sock, m, dlen, timeout);
1300 if (dest->addrtype == TIPC_ADDR_NAME)
1301 return tipc_send_group_anycast(sock, m, dlen, timeout);
1302 if (dest->addrtype == TIPC_ADDR_ID)
1303 return tipc_send_group_unicast(sock, m, dlen, timeout);
1304 if (dest->addrtype == TIPC_ADDR_MCAST)
1305 return tipc_send_group_mcast(sock, m, dlen, timeout);
1309 if (unlikely(!dest)) {
1311 if (!syn || dest->family != AF_TIPC)
1312 return -EDESTADDRREQ;
1315 if (unlikely(syn)) {
1316 if (sk->sk_state == TIPC_LISTEN)
1318 if (sk->sk_state != TIPC_OPEN)
1322 if (dest->addrtype == TIPC_ADDR_NAME) {
1323 tsk->conn_type = dest->addr.name.name.type;
1324 tsk->conn_instance = dest->addr.name.name.instance;
1328 seq = &dest->addr.nameseq;
1329 if (dest->addrtype == TIPC_ADDR_MCAST)
1330 return tipc_sendmcast(sock, seq, m, dlen, timeout);
1332 if (dest->addrtype == TIPC_ADDR_NAME) {
1333 type = dest->addr.name.name.type;
1334 inst = dest->addr.name.name.instance;
1335 domain = dest->addr.name.domain;
1337 msg_set_type(hdr, TIPC_NAMED_MSG);
1338 msg_set_hdr_sz(hdr, NAMED_H_SIZE);
1339 msg_set_nametype(hdr, type);
1340 msg_set_nameinst(hdr, inst);
1341 msg_set_lookup_scope(hdr, tipc_addr_scope(domain));
1342 dport = tipc_nametbl_translate(net, type, inst, &dnode);
1343 msg_set_destnode(hdr, dnode);
1344 msg_set_destport(hdr, dport);
1345 if (unlikely(!dport && !dnode))
1346 return -EHOSTUNREACH;
1347 } else if (dest->addrtype == TIPC_ADDR_ID) {
1348 dnode = dest->addr.id.node;
1349 msg_set_type(hdr, TIPC_DIRECT_MSG);
1350 msg_set_lookup_scope(hdr, 0);
1351 msg_set_destnode(hdr, dnode);
1352 msg_set_destport(hdr, dest->addr.id.ref);
1353 msg_set_hdr_sz(hdr, BASIC_H_SIZE);
1356 /* Block or return if destination link is congested */
1357 rc = tipc_wait_for_cond(sock, &timeout,
1358 !tipc_dest_find(clinks, dnode, 0));
1362 skb_queue_head_init(&pkts);
1363 mtu = tipc_node_get_mtu(net, dnode, tsk->portid);
1364 rc = tipc_msg_build(hdr, m, 0, dlen, mtu, &pkts);
1365 if (unlikely(rc != dlen))
1368 rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
1369 if (unlikely(rc == -ELINKCONG)) {
1370 tipc_dest_push(clinks, dnode, 0);
1371 tsk->cong_link_cnt++;
1375 if (unlikely(syn && !rc))
1376 tipc_set_sk_state(sk, TIPC_CONNECTING);
1378 return rc ? rc : dlen;
1382 * tipc_sendstream - send stream-oriented data
1383 * @sock: socket structure
1385 * @dsz: total length of data to be transmitted
1387 * Used for SOCK_STREAM data.
1389 * Returns the number of bytes sent on success (or partial success),
1390 * or errno if no data sent
1392 static int tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dsz)
1394 struct sock *sk = sock->sk;
1398 ret = __tipc_sendstream(sock, m, dsz);
1404 static int __tipc_sendstream(struct socket *sock, struct msghdr *m, size_t dlen)
1406 struct sock *sk = sock->sk;
1407 DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
1408 long timeout = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
1409 struct tipc_sock *tsk = tipc_sk(sk);
1410 struct tipc_msg *hdr = &tsk->phdr;
1411 struct net *net = sock_net(sk);
1412 struct sk_buff_head pkts;
1413 u32 dnode = tsk_peer_node(tsk);
1417 skb_queue_head_init(&pkts);
1419 if (unlikely(dlen > INT_MAX))
1422 /* Handle implicit connection setup */
1423 if (unlikely(dest)) {
1424 rc = __tipc_sendmsg(sock, m, dlen);
1425 if (dlen && (dlen == rc))
1426 tsk->snt_unacked = tsk_inc(tsk, dlen + msg_hdr_sz(hdr));
1431 rc = tipc_wait_for_cond(sock, &timeout,
1432 (!tsk->cong_link_cnt &&
1433 !tsk_conn_cong(tsk) &&
1434 tipc_sk_connected(sk)));
1438 send = min_t(size_t, dlen - sent, TIPC_MAX_USER_MSG_SIZE);
1439 rc = tipc_msg_build(hdr, m, sent, send, tsk->max_pkt, &pkts);
1440 if (unlikely(rc != send))
1443 rc = tipc_node_xmit(net, &pkts, dnode, tsk->portid);
1444 if (unlikely(rc == -ELINKCONG)) {
1445 tsk->cong_link_cnt = 1;
1449 tsk->snt_unacked += tsk_inc(tsk, send + MIN_H_SIZE);
1452 } while (sent < dlen && !rc);
1454 return sent ? sent : rc;
1458 * tipc_send_packet - send a connection-oriented message
1459 * @sock: socket structure
1460 * @m: message to send
1461 * @dsz: length of data to be transmitted
1463 * Used for SOCK_SEQPACKET messages.
1465 * Returns the number of bytes sent on success, or errno otherwise
1467 static int tipc_send_packet(struct socket *sock, struct msghdr *m, size_t dsz)
1469 if (dsz > TIPC_MAX_USER_MSG_SIZE)
1472 return tipc_sendstream(sock, m, dsz);
1475 /* tipc_sk_finish_conn - complete the setup of a connection
1477 static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port,
1480 struct sock *sk = &tsk->sk;
1481 struct net *net = sock_net(sk);
1482 struct tipc_msg *msg = &tsk->phdr;
1484 msg_set_destnode(msg, peer_node);
1485 msg_set_destport(msg, peer_port);
1486 msg_set_type(msg, TIPC_CONN_MSG);
1487 msg_set_lookup_scope(msg, 0);
1488 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1490 sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV);
1491 tipc_set_sk_state(sk, TIPC_ESTABLISHED);
1492 tipc_node_add_conn(net, peer_node, tsk->portid, peer_port);
1493 tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid);
1494 tsk->peer_caps = tipc_node_get_capabilities(net, peer_node);
1495 if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL)
1498 /* Fall back to message based flow control */
1499 tsk->rcv_win = FLOWCTL_MSG_WIN;
1500 tsk->snd_win = FLOWCTL_MSG_WIN;
1504 * tipc_sk_set_orig_addr - capture sender's address for received message
1505 * @m: descriptor for message info
1506 * @hdr: received message header
1508 * Note: Address is not captured if not requested by receiver.
1510 static void tipc_sk_set_orig_addr(struct msghdr *m, struct sk_buff *skb)
1512 DECLARE_SOCKADDR(struct sockaddr_pair *, srcaddr, m->msg_name);
1513 struct tipc_msg *hdr = buf_msg(skb);
1518 srcaddr->sock.family = AF_TIPC;
1519 srcaddr->sock.addrtype = TIPC_ADDR_ID;
1520 srcaddr->sock.addr.id.ref = msg_origport(hdr);
1521 srcaddr->sock.addr.id.node = msg_orignode(hdr);
1522 srcaddr->sock.addr.name.domain = 0;
1523 srcaddr->sock.scope = 0;
1524 m->msg_namelen = sizeof(struct sockaddr_tipc);
1526 if (!msg_in_group(hdr))
1529 /* Group message users may also want to know sending member's id */
1530 srcaddr->member.family = AF_TIPC;
1531 srcaddr->member.addrtype = TIPC_ADDR_NAME;
1532 srcaddr->member.addr.name.name.type = msg_nametype(hdr);
1533 srcaddr->member.addr.name.name.instance = TIPC_SKB_CB(skb)->orig_member;
1534 srcaddr->member.addr.name.domain = 0;
1535 m->msg_namelen = sizeof(*srcaddr);
1539 * tipc_sk_anc_data_recv - optionally capture ancillary data for received message
1540 * @m: descriptor for message info
1541 * @msg: received message header
1542 * @tsk: TIPC port associated with message
1544 * Note: Ancillary data is not captured if not requested by receiver.
1546 * Returns 0 if successful, otherwise errno
1548 static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
1549 struct tipc_sock *tsk)
1557 if (likely(m->msg_controllen == 0))
1560 /* Optionally capture errored message object(s) */
1561 err = msg ? msg_errcode(msg) : 0;
1562 if (unlikely(err)) {
1564 anc_data[1] = msg_data_sz(msg);
1565 res = put_cmsg(m, SOL_TIPC, TIPC_ERRINFO, 8, anc_data);
1569 res = put_cmsg(m, SOL_TIPC, TIPC_RETDATA, anc_data[1],
1576 /* Optionally capture message destination object */
1577 dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG;
1578 switch (dest_type) {
1579 case TIPC_NAMED_MSG:
1581 anc_data[0] = msg_nametype(msg);
1582 anc_data[1] = msg_namelower(msg);
1583 anc_data[2] = msg_namelower(msg);
1585 case TIPC_MCAST_MSG:
1587 anc_data[0] = msg_nametype(msg);
1588 anc_data[1] = msg_namelower(msg);
1589 anc_data[2] = msg_nameupper(msg);
1592 has_name = (tsk->conn_type != 0);
1593 anc_data[0] = tsk->conn_type;
1594 anc_data[1] = tsk->conn_instance;
1595 anc_data[2] = tsk->conn_instance;
1601 res = put_cmsg(m, SOL_TIPC, TIPC_DESTNAME, 12, anc_data);
1609 static void tipc_sk_send_ack(struct tipc_sock *tsk)
1611 struct sock *sk = &tsk->sk;
1612 struct net *net = sock_net(sk);
1613 struct sk_buff *skb = NULL;
1614 struct tipc_msg *msg;
1615 u32 peer_port = tsk_peer_port(tsk);
1616 u32 dnode = tsk_peer_node(tsk);
1618 if (!tipc_sk_connected(sk))
1620 skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0,
1621 dnode, tsk_own_node(tsk), peer_port,
1622 tsk->portid, TIPC_OK);
1626 msg_set_conn_ack(msg, tsk->rcv_unacked);
1627 tsk->rcv_unacked = 0;
1629 /* Adjust to and advertize the correct window limit */
1630 if (tsk->peer_caps & TIPC_BLOCK_FLOWCTL) {
1631 tsk->rcv_win = tsk_adv_blocks(tsk->sk.sk_rcvbuf);
1632 msg_set_adv_win(msg, tsk->rcv_win);
1634 tipc_node_xmit_skb(net, skb, dnode, msg_link_selector(msg));
1637 static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop)
1639 struct sock *sk = sock->sk;
1641 long timeo = *timeop;
1642 int err = sock_error(sk);
1648 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1649 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
1650 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1655 timeo = schedule_timeout(timeo);
1659 if (!skb_queue_empty(&sk->sk_receive_queue))
1664 err = sock_intr_errno(timeo);
1665 if (signal_pending(current))
1668 err = sock_error(sk);
1672 finish_wait(sk_sleep(sk), &wait);
1678 * tipc_recvmsg - receive packet-oriented message
1679 * @m: descriptor for message info
1680 * @buflen: length of user buffer area
1681 * @flags: receive flags
1683 * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages.
1684 * If the complete message doesn't fit in user area, truncate it.
1686 * Returns size of returned message data, errno otherwise
1688 static int tipc_recvmsg(struct socket *sock, struct msghdr *m,
1689 size_t buflen, int flags)
1691 struct sock *sk = sock->sk;
1692 bool connected = !tipc_sk_type_connectionless(sk);
1693 struct tipc_sock *tsk = tipc_sk(sk);
1694 int rc, err, hlen, dlen, copy;
1695 struct sk_buff_head xmitq;
1696 struct tipc_msg *hdr;
1697 struct sk_buff *skb;
1701 /* Catch invalid receive requests */
1702 if (unlikely(!buflen))
1706 if (unlikely(connected && sk->sk_state == TIPC_OPEN)) {
1710 timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
1712 /* Step rcv queue to first msg with data or error; wait if necessary */
1714 rc = tipc_wait_for_rcvmsg(sock, &timeout);
1717 skb = skb_peek(&sk->sk_receive_queue);
1719 dlen = msg_data_sz(hdr);
1720 hlen = msg_hdr_sz(hdr);
1721 err = msg_errcode(hdr);
1722 grp_evt = msg_is_grp_evt(hdr);
1723 if (likely(dlen || err))
1725 tsk_advance_rx_queue(sk);
1728 /* Collect msg meta data, including error code and rejected data */
1729 tipc_sk_set_orig_addr(m, skb);
1730 rc = tipc_sk_anc_data_recv(m, hdr, tsk);
1734 /* Capture data if non-error msg, otherwise just set return value */
1736 copy = min_t(int, dlen, buflen);
1737 if (unlikely(copy != dlen))
1738 m->msg_flags |= MSG_TRUNC;
1739 rc = skb_copy_datagram_msg(skb, hlen, m, copy);
1743 if (err != TIPC_CONN_SHUTDOWN && connected && !m->msg_control)
1749 /* Mark message as group event if applicable */
1750 if (unlikely(grp_evt)) {
1751 if (msg_grp_evt(hdr) == TIPC_WITHDRAWN)
1752 m->msg_flags |= MSG_EOR;
1753 m->msg_flags |= MSG_OOB;
1757 /* Caption of data or error code/rejected data was successful */
1758 if (unlikely(flags & MSG_PEEK))
1761 /* Send group flow control advertisement when applicable */
1762 if (tsk->group && msg_in_group(hdr) && !grp_evt) {
1763 skb_queue_head_init(&xmitq);
1764 tipc_group_update_rcv_win(tsk->group, tsk_blocks(hlen + dlen),
1765 msg_orignode(hdr), msg_origport(hdr),
1767 tipc_node_distr_xmit(sock_net(sk), &xmitq);
1770 tsk_advance_rx_queue(sk);
1772 if (likely(!connected))
1775 /* Send connection flow control advertisement when applicable */
1776 tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen);
1777 if (tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE)
1778 tipc_sk_send_ack(tsk);
1781 return rc ? rc : copy;
1785 * tipc_recvstream - receive stream-oriented data
1786 * @m: descriptor for message info
1787 * @buflen: total size of user buffer area
1788 * @flags: receive flags
1790 * Used for SOCK_STREAM messages only. If not enough data is available
1791 * will optionally wait for more; never truncates data.
1793 * Returns size of returned message data, errno otherwise
1795 static int tipc_recvstream(struct socket *sock, struct msghdr *m,
1796 size_t buflen, int flags)
1798 struct sock *sk = sock->sk;
1799 struct tipc_sock *tsk = tipc_sk(sk);
1800 struct sk_buff *skb;
1801 struct tipc_msg *hdr;
1802 struct tipc_skb_cb *skb_cb;
1803 bool peek = flags & MSG_PEEK;
1804 int offset, required, copy, copied = 0;
1805 int hlen, dlen, err, rc;
1808 /* Catch invalid receive attempts */
1809 if (unlikely(!buflen))
1814 if (unlikely(sk->sk_state == TIPC_OPEN)) {
1818 required = sock_rcvlowat(sk, flags & MSG_WAITALL, buflen);
1819 timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
1822 /* Look at first msg in receive queue; wait if necessary */
1823 rc = tipc_wait_for_rcvmsg(sock, &timeout);
1826 skb = skb_peek(&sk->sk_receive_queue);
1827 skb_cb = TIPC_SKB_CB(skb);
1829 dlen = msg_data_sz(hdr);
1830 hlen = msg_hdr_sz(hdr);
1831 err = msg_errcode(hdr);
1833 /* Discard any empty non-errored (SYN-) message */
1834 if (unlikely(!dlen && !err)) {
1835 tsk_advance_rx_queue(sk);
1839 /* Collect msg meta data, incl. error code and rejected data */
1841 tipc_sk_set_orig_addr(m, skb);
1842 rc = tipc_sk_anc_data_recv(m, hdr, tsk);
1847 /* Copy data if msg ok, otherwise return error/partial data */
1849 offset = skb_cb->bytes_read;
1850 copy = min_t(int, dlen - offset, buflen - copied);
1851 rc = skb_copy_datagram_msg(skb, hlen + offset, m, copy);
1856 if (unlikely(offset < dlen)) {
1858 skb_cb->bytes_read = offset;
1863 if ((err != TIPC_CONN_SHUTDOWN) && !m->msg_control)
1872 tsk_advance_rx_queue(sk);
1874 /* Send connection flow control advertisement when applicable */
1875 tsk->rcv_unacked += tsk_inc(tsk, hlen + dlen);
1876 if (unlikely(tsk->rcv_unacked >= tsk->rcv_win / TIPC_ACK_RATE))
1877 tipc_sk_send_ack(tsk);
1879 /* Exit if all requested data or FIN/error received */
1880 if (copied == buflen || err)
1883 } while (!skb_queue_empty(&sk->sk_receive_queue) || copied < required);
1886 return copied ? copied : rc;
1890 * tipc_write_space - wake up thread if port congestion is released
1893 static void tipc_write_space(struct sock *sk)
1895 struct socket_wq *wq;
1898 wq = rcu_dereference(sk->sk_wq);
1899 if (skwq_has_sleeper(wq))
1900 wake_up_interruptible_sync_poll(&wq->wait, POLLOUT |
1901 POLLWRNORM | POLLWRBAND);
1906 * tipc_data_ready - wake up threads to indicate messages have been received
1908 * @len: the length of messages
1910 static void tipc_data_ready(struct sock *sk)
1912 struct socket_wq *wq;
1915 wq = rcu_dereference(sk->sk_wq);
1916 if (skwq_has_sleeper(wq))
1917 wake_up_interruptible_sync_poll(&wq->wait, POLLIN |
1918 POLLRDNORM | POLLRDBAND);
1922 static void tipc_sock_destruct(struct sock *sk)
1924 __skb_queue_purge(&sk->sk_receive_queue);
1927 static void tipc_sk_proto_rcv(struct sock *sk,
1928 struct sk_buff_head *inputq,
1929 struct sk_buff_head *xmitq)
1931 struct sk_buff *skb = __skb_dequeue(inputq);
1932 struct tipc_sock *tsk = tipc_sk(sk);
1933 struct tipc_msg *hdr = buf_msg(skb);
1934 struct tipc_group *grp = tsk->group;
1935 bool wakeup = false;
1937 switch (msg_user(hdr)) {
1939 tipc_sk_conn_proto_rcv(tsk, skb, xmitq);
1942 tipc_dest_del(&tsk->cong_links, msg_orignode(hdr), 0);
1943 tsk->cong_link_cnt--;
1946 case GROUP_PROTOCOL:
1947 tipc_group_proto_rcv(grp, &wakeup, hdr, inputq, xmitq);
1950 tipc_group_member_evt(tsk->group, &wakeup, &sk->sk_rcvbuf,
1951 hdr, inputq, xmitq);
1958 sk->sk_write_space(sk);
1964 * tipc_filter_connect - Handle incoming message for a connection-based socket
1966 * @skb: pointer to message buffer. Set to NULL if buffer is consumed
1968 * Returns true if everything ok, false otherwise
1970 static bool tipc_sk_filter_connect(struct tipc_sock *tsk, struct sk_buff *skb)
1972 struct sock *sk = &tsk->sk;
1973 struct net *net = sock_net(sk);
1974 struct tipc_msg *hdr = buf_msg(skb);
1975 u32 pport = msg_origport(hdr);
1976 u32 pnode = msg_orignode(hdr);
1978 if (unlikely(msg_mcast(hdr)))
1981 switch (sk->sk_state) {
1982 case TIPC_CONNECTING:
1983 /* Accept only ACK or NACK message */
1984 if (unlikely(!msg_connected(hdr))) {
1985 if (pport != tsk_peer_port(tsk) ||
1986 pnode != tsk_peer_node(tsk))
1989 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
1990 sk->sk_err = ECONNREFUSED;
1991 sk->sk_state_change(sk);
1995 if (unlikely(msg_errcode(hdr))) {
1996 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
1997 sk->sk_err = ECONNREFUSED;
1998 sk->sk_state_change(sk);
2002 if (unlikely(!msg_isdata(hdr))) {
2003 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
2004 sk->sk_err = EINVAL;
2005 sk->sk_state_change(sk);
2009 tipc_sk_finish_conn(tsk, msg_origport(hdr), msg_orignode(hdr));
2010 msg_set_importance(&tsk->phdr, msg_importance(hdr));
2012 /* If 'ACK+' message, add to socket receive queue */
2013 if (msg_data_sz(hdr))
2016 /* If empty 'ACK-' message, wake up sleeping connect() */
2017 sk->sk_data_ready(sk);
2019 /* 'ACK-' message is neither accepted nor rejected: */
2020 msg_set_dest_droppable(hdr, 1);
2024 case TIPC_DISCONNECTING:
2027 /* Accept only SYN message */
2028 if (!msg_connected(hdr) && !(msg_errcode(hdr)))
2031 case TIPC_ESTABLISHED:
2032 /* Accept only connection-based messages sent by peer */
2033 if (unlikely(!tsk_peer_msg(tsk, hdr)))
2036 if (unlikely(msg_errcode(hdr))) {
2037 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
2038 /* Let timer expire on it's own */
2039 tipc_node_remove_conn(net, tsk_peer_node(tsk),
2041 sk->sk_state_change(sk);
2045 pr_err("Unknown sk_state %u\n", sk->sk_state);
2052 * rcvbuf_limit - get proper overload limit of socket receive queue
2056 * For connection oriented messages, irrespective of importance,
2057 * default queue limit is 2 MB.
2059 * For connectionless messages, queue limits are based on message
2060 * importance as follows:
2062 * TIPC_LOW_IMPORTANCE (2 MB)
2063 * TIPC_MEDIUM_IMPORTANCE (4 MB)
2064 * TIPC_HIGH_IMPORTANCE (8 MB)
2065 * TIPC_CRITICAL_IMPORTANCE (16 MB)
2067 * Returns overload limit according to corresponding message importance
2069 static unsigned int rcvbuf_limit(struct sock *sk, struct sk_buff *skb)
2071 struct tipc_sock *tsk = tipc_sk(sk);
2072 struct tipc_msg *hdr = buf_msg(skb);
2074 if (unlikely(msg_in_group(hdr)))
2075 return sk->sk_rcvbuf;
2077 if (unlikely(!msg_connected(hdr)))
2078 return sk->sk_rcvbuf << msg_importance(hdr);
2080 if (likely(tsk->peer_caps & TIPC_BLOCK_FLOWCTL))
2081 return sk->sk_rcvbuf;
2083 return FLOWCTL_MSG_LIM;
2087 * tipc_sk_filter_rcv - validate incoming message
2089 * @skb: pointer to message.
2091 * Enqueues message on receive queue if acceptable; optionally handles
2092 * disconnect indication for a connected socket.
2094 * Called with socket lock already taken
2097 static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,
2098 struct sk_buff_head *xmitq)
2100 bool sk_conn = !tipc_sk_type_connectionless(sk);
2101 struct tipc_sock *tsk = tipc_sk(sk);
2102 struct tipc_group *grp = tsk->group;
2103 struct tipc_msg *hdr = buf_msg(skb);
2104 struct net *net = sock_net(sk);
2105 struct sk_buff_head inputq;
2106 int limit, err = TIPC_OK;
2108 TIPC_SKB_CB(skb)->bytes_read = 0;
2109 __skb_queue_head_init(&inputq);
2110 __skb_queue_tail(&inputq, skb);
2112 if (unlikely(!msg_isdata(hdr)))
2113 tipc_sk_proto_rcv(sk, &inputq, xmitq);
2116 tipc_group_filter_msg(grp, &inputq, xmitq);
2118 /* Validate and add to receive buffer if there is space */
2119 while ((skb = __skb_dequeue(&inputq))) {
2121 limit = rcvbuf_limit(sk, skb);
2122 if ((sk_conn && !tipc_sk_filter_connect(tsk, skb)) ||
2123 (!sk_conn && msg_connected(hdr)) ||
2124 (!grp && msg_in_group(hdr)))
2125 err = TIPC_ERR_NO_PORT;
2126 else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit)
2127 err = TIPC_ERR_OVERLOAD;
2129 if (unlikely(err)) {
2130 tipc_skb_reject(net, err, skb, xmitq);
2134 __skb_queue_tail(&sk->sk_receive_queue, skb);
2135 skb_set_owner_r(skb, sk);
2136 sk->sk_data_ready(sk);
2141 * tipc_sk_backlog_rcv - handle incoming message from backlog queue
2145 * Caller must hold socket lock
2147 static int tipc_sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
2149 unsigned int before = sk_rmem_alloc_get(sk);
2150 struct sk_buff_head xmitq;
2153 __skb_queue_head_init(&xmitq);
2155 tipc_sk_filter_rcv(sk, skb, &xmitq);
2156 added = sk_rmem_alloc_get(sk) - before;
2157 atomic_add(added, &tipc_sk(sk)->dupl_rcvcnt);
2159 /* Send pending response/rejected messages, if any */
2160 tipc_node_distr_xmit(sock_net(sk), &xmitq);
2165 * tipc_sk_enqueue - extract all buffers with destination 'dport' from
2166 * inputq and try adding them to socket or backlog queue
2167 * @inputq: list of incoming buffers with potentially different destinations
2168 * @sk: socket where the buffers should be enqueued
2169 * @dport: port number for the socket
2171 * Caller must hold socket lock
2173 static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,
2174 u32 dport, struct sk_buff_head *xmitq)
2176 unsigned long time_limit = jiffies + 2;
2177 struct sk_buff *skb;
2182 while (skb_queue_len(inputq)) {
2183 if (unlikely(time_after_eq(jiffies, time_limit)))
2186 skb = tipc_skb_dequeue(inputq, dport);
2190 /* Add message directly to receive queue if possible */
2191 if (!sock_owned_by_user(sk)) {
2192 tipc_sk_filter_rcv(sk, skb, xmitq);
2196 /* Try backlog, compensating for double-counted bytes */
2197 dcnt = &tipc_sk(sk)->dupl_rcvcnt;
2198 if (!sk->sk_backlog.len)
2199 atomic_set(dcnt, 0);
2200 lim = rcvbuf_limit(sk, skb) + atomic_read(dcnt);
2201 if (likely(!sk_add_backlog(sk, skb, lim)))
2204 /* Overload => reject message back to sender */
2205 onode = tipc_own_addr(sock_net(sk));
2206 if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD))
2207 __skb_queue_tail(xmitq, skb);
2213 * tipc_sk_rcv - handle a chain of incoming buffers
2214 * @inputq: buffer list containing the buffers
2215 * Consumes all buffers in list until inputq is empty
2216 * Note: may be called in multiple threads referring to the same queue
2218 void tipc_sk_rcv(struct net *net, struct sk_buff_head *inputq)
2220 struct sk_buff_head xmitq;
2221 u32 dnode, dport = 0;
2223 struct tipc_sock *tsk;
2225 struct sk_buff *skb;
2227 __skb_queue_head_init(&xmitq);
2228 while (skb_queue_len(inputq)) {
2229 dport = tipc_skb_peek_port(inputq, dport);
2230 tsk = tipc_sk_lookup(net, dport);
2234 if (likely(spin_trylock_bh(&sk->sk_lock.slock))) {
2235 tipc_sk_enqueue(inputq, sk, dport, &xmitq);
2236 spin_unlock_bh(&sk->sk_lock.slock);
2238 /* Send pending response/rejected messages, if any */
2239 tipc_node_distr_xmit(sock_net(sk), &xmitq);
2243 /* No destination socket => dequeue skb if still there */
2244 skb = tipc_skb_dequeue(inputq, dport);
2248 /* Try secondary lookup if unresolved named message */
2249 err = TIPC_ERR_NO_PORT;
2250 if (tipc_msg_lookup_dest(net, skb, &err))
2253 /* Prepare for message rejection */
2254 if (!tipc_msg_reverse(tipc_own_addr(net), &skb, err))
2257 dnode = msg_destnode(buf_msg(skb));
2258 tipc_node_xmit_skb(net, skb, dnode, dport);
2262 static int tipc_wait_for_connect(struct socket *sock, long *timeo_p)
2264 DEFINE_WAIT_FUNC(wait, woken_wake_function);
2265 struct sock *sk = sock->sk;
2269 int err = sock_error(sk);
2274 if (signal_pending(current))
2275 return sock_intr_errno(*timeo_p);
2277 add_wait_queue(sk_sleep(sk), &wait);
2278 done = sk_wait_event(sk, timeo_p,
2279 sk->sk_state != TIPC_CONNECTING, &wait);
2280 remove_wait_queue(sk_sleep(sk), &wait);
2286 * tipc_connect - establish a connection to another TIPC port
2287 * @sock: socket structure
2288 * @dest: socket address for destination port
2289 * @destlen: size of socket address data structure
2290 * @flags: file-related flags associated with socket
2292 * Returns 0 on success, errno otherwise
2294 static int tipc_connect(struct socket *sock, struct sockaddr *dest,
2295 int destlen, int flags)
2297 struct sock *sk = sock->sk;
2298 struct tipc_sock *tsk = tipc_sk(sk);
2299 struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest;
2300 struct msghdr m = {NULL,};
2301 long timeout = (flags & O_NONBLOCK) ? 0 : tsk->conn_timeout;
2305 if (destlen != sizeof(struct sockaddr_tipc))
2315 if (dst->family == AF_UNSPEC) {
2316 memset(&tsk->peer, 0, sizeof(struct sockaddr_tipc));
2317 if (!tipc_sk_type_connectionless(sk))
2320 } else if (dst->family != AF_TIPC) {
2323 if (dst->addrtype != TIPC_ADDR_ID && dst->addrtype != TIPC_ADDR_NAME)
2328 /* DGRAM/RDM connect(), just save the destaddr */
2329 if (tipc_sk_type_connectionless(sk)) {
2330 memcpy(&tsk->peer, dest, destlen);
2334 previous = sk->sk_state;
2336 switch (sk->sk_state) {
2338 /* Send a 'SYN-' to destination */
2340 m.msg_namelen = destlen;
2342 /* If connect is in non-blocking case, set MSG_DONTWAIT to
2343 * indicate send_msg() is never blocked.
2346 m.msg_flags = MSG_DONTWAIT;
2348 res = __tipc_sendmsg(sock, &m, 0);
2349 if ((res < 0) && (res != -EWOULDBLOCK))
2352 /* Just entered TIPC_CONNECTING state; the only
2353 * difference is that return value in non-blocking
2354 * case is EINPROGRESS, rather than EALREADY.
2358 case TIPC_CONNECTING:
2360 if (previous == TIPC_CONNECTING)
2364 timeout = msecs_to_jiffies(timeout);
2365 /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
2366 res = tipc_wait_for_connect(sock, &timeout);
2368 case TIPC_ESTABLISHED:
2381 * tipc_listen - allow socket to listen for incoming connections
2382 * @sock: socket structure
2385 * Returns 0 on success, errno otherwise
2387 static int tipc_listen(struct socket *sock, int len)
2389 struct sock *sk = sock->sk;
2393 res = tipc_set_sk_state(sk, TIPC_LISTEN);
2399 static int tipc_wait_for_accept(struct socket *sock, long timeo)
2401 struct sock *sk = sock->sk;
2405 /* True wake-one mechanism for incoming connections: only
2406 * one process gets woken up, not the 'whole herd'.
2407 * Since we do not 'race & poll' for established sockets
2408 * anymore, the common case will execute the loop only once.
2411 prepare_to_wait_exclusive(sk_sleep(sk), &wait,
2412 TASK_INTERRUPTIBLE);
2413 if (timeo && skb_queue_empty(&sk->sk_receive_queue)) {
2415 timeo = schedule_timeout(timeo);
2419 if (!skb_queue_empty(&sk->sk_receive_queue))
2424 err = sock_intr_errno(timeo);
2425 if (signal_pending(current))
2428 finish_wait(sk_sleep(sk), &wait);
2433 * tipc_accept - wait for connection request
2434 * @sock: listening socket
2435 * @newsock: new socket that is to be connected
2436 * @flags: file-related flags associated with socket
2438 * Returns 0 on success, errno otherwise
2440 static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags,
2443 struct sock *new_sk, *sk = sock->sk;
2444 struct sk_buff *buf;
2445 struct tipc_sock *new_tsock;
2446 struct tipc_msg *msg;
2452 if (sk->sk_state != TIPC_LISTEN) {
2456 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
2457 res = tipc_wait_for_accept(sock, timeo);
2461 buf = skb_peek(&sk->sk_receive_queue);
2463 res = tipc_sk_create(sock_net(sock->sk), new_sock, 0, kern);
2466 security_sk_clone(sock->sk, new_sock->sk);
2468 new_sk = new_sock->sk;
2469 new_tsock = tipc_sk(new_sk);
2472 /* we lock on new_sk; but lockdep sees the lock on sk */
2473 lock_sock_nested(new_sk, SINGLE_DEPTH_NESTING);
2476 * Reject any stray messages received by new socket
2477 * before the socket lock was taken (very, very unlikely)
2479 tsk_rej_rx_queue(new_sk);
2481 /* Connect new socket to it's peer */
2482 tipc_sk_finish_conn(new_tsock, msg_origport(msg), msg_orignode(msg));
2484 tsk_set_importance(new_tsock, msg_importance(msg));
2485 if (msg_named(msg)) {
2486 new_tsock->conn_type = msg_nametype(msg);
2487 new_tsock->conn_instance = msg_nameinst(msg);
2491 * Respond to 'SYN-' by discarding it & returning 'ACK'-.
2492 * Respond to 'SYN+' by queuing it on new socket.
2494 if (!msg_data_sz(msg)) {
2495 struct msghdr m = {NULL,};
2497 tsk_advance_rx_queue(sk);
2498 __tipc_sendstream(new_sock, &m, 0);
2500 __skb_dequeue(&sk->sk_receive_queue);
2501 __skb_queue_head(&new_sk->sk_receive_queue, buf);
2502 skb_set_owner_r(buf, new_sk);
2504 release_sock(new_sk);
2511 * tipc_shutdown - shutdown socket connection
2512 * @sock: socket structure
2513 * @how: direction to close (must be SHUT_RDWR)
2515 * Terminates connection (if necessary), then purges socket's receive queue.
2517 * Returns 0 on success, errno otherwise
2519 static int tipc_shutdown(struct socket *sock, int how)
2521 struct sock *sk = sock->sk;
2524 if (how != SHUT_RDWR)
2529 __tipc_shutdown(sock, TIPC_CONN_SHUTDOWN);
2530 sk->sk_shutdown = SEND_SHUTDOWN;
2532 if (sk->sk_state == TIPC_DISCONNECTING) {
2533 /* Discard any unreceived messages */
2534 __skb_queue_purge(&sk->sk_receive_queue);
2536 /* Wake up anyone sleeping in poll */
2537 sk->sk_state_change(sk);
2547 static void tipc_sk_timeout(struct timer_list *t)
2549 struct sock *sk = from_timer(sk, t, sk_timer);
2550 struct tipc_sock *tsk = tipc_sk(sk);
2551 u32 peer_port = tsk_peer_port(tsk);
2552 u32 peer_node = tsk_peer_node(tsk);
2553 u32 own_node = tsk_own_node(tsk);
2554 u32 own_port = tsk->portid;
2555 struct net *net = sock_net(sk);
2556 struct sk_buff *skb = NULL;
2559 if (!tipc_sk_connected(sk))
2562 /* Try again later if socket is busy */
2563 if (sock_owned_by_user(sk)) {
2564 sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20);
2568 if (tsk->probe_unacked) {
2569 tipc_set_sk_state(sk, TIPC_DISCONNECTING);
2570 tipc_node_remove_conn(net, peer_node, peer_port);
2571 sk->sk_state_change(sk);
2574 /* Send new probe */
2575 skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0,
2576 peer_node, own_node, peer_port, own_port,
2578 tsk->probe_unacked = true;
2579 sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV);
2583 tipc_node_xmit_skb(net, skb, peer_node, own_port);
2587 static int tipc_sk_publish(struct tipc_sock *tsk, uint scope,
2588 struct tipc_name_seq const *seq)
2590 struct sock *sk = &tsk->sk;
2591 struct net *net = sock_net(sk);
2592 struct publication *publ;
2595 if (tipc_sk_connected(sk))
2597 key = tsk->portid + tsk->pub_count + 1;
2598 if (key == tsk->portid)
2601 publ = tipc_nametbl_publish(net, seq->type, seq->lower, seq->upper,
2602 scope, tsk->portid, key);
2603 if (unlikely(!publ))
2606 list_add(&publ->pport_list, &tsk->publications);
2612 static int tipc_sk_withdraw(struct tipc_sock *tsk, uint scope,
2613 struct tipc_name_seq const *seq)
2615 struct net *net = sock_net(&tsk->sk);
2616 struct publication *publ;
2617 struct publication *safe;
2620 list_for_each_entry_safe(publ, safe, &tsk->publications, pport_list) {
2622 if (publ->scope != scope)
2624 if (publ->type != seq->type)
2626 if (publ->lower != seq->lower)
2628 if (publ->upper != seq->upper)
2630 tipc_nametbl_withdraw(net, publ->type, publ->lower,
2631 publ->ref, publ->key);
2635 tipc_nametbl_withdraw(net, publ->type, publ->lower,
2636 publ->ref, publ->key);
2639 if (list_empty(&tsk->publications))
2644 /* tipc_sk_reinit: set non-zero address in all existing sockets
2645 * when we go from standalone to network mode.
2647 void tipc_sk_reinit(struct net *net)
2649 struct tipc_net *tn = net_generic(net, tipc_net_id);
2650 struct rhashtable_iter iter;
2651 struct tipc_sock *tsk;
2652 struct tipc_msg *msg;
2654 rhashtable_walk_enter(&tn->sk_rht, &iter);
2657 rhashtable_walk_start(&iter);
2659 while ((tsk = rhashtable_walk_next(&iter)) && !IS_ERR(tsk)) {
2660 spin_lock_bh(&tsk->sk.sk_lock.slock);
2662 msg_set_prevnode(msg, tn->own_addr);
2663 msg_set_orignode(msg, tn->own_addr);
2664 spin_unlock_bh(&tsk->sk.sk_lock.slock);
2667 rhashtable_walk_stop(&iter);
2668 } while (tsk == ERR_PTR(-EAGAIN));
2671 static struct tipc_sock *tipc_sk_lookup(struct net *net, u32 portid)
2673 struct tipc_net *tn = net_generic(net, tipc_net_id);
2674 struct tipc_sock *tsk;
2677 tsk = rhashtable_lookup_fast(&tn->sk_rht, &portid, tsk_rht_params);
2679 sock_hold(&tsk->sk);
2685 static int tipc_sk_insert(struct tipc_sock *tsk)
2687 struct sock *sk = &tsk->sk;
2688 struct net *net = sock_net(sk);
2689 struct tipc_net *tn = net_generic(net, tipc_net_id);
2690 u32 remaining = (TIPC_MAX_PORT - TIPC_MIN_PORT) + 1;
2691 u32 portid = prandom_u32() % remaining + TIPC_MIN_PORT;
2693 while (remaining--) {
2695 if ((portid < TIPC_MIN_PORT) || (portid > TIPC_MAX_PORT))
2696 portid = TIPC_MIN_PORT;
2697 tsk->portid = portid;
2698 sock_hold(&tsk->sk);
2699 if (!rhashtable_lookup_insert_fast(&tn->sk_rht, &tsk->node,
2708 static void tipc_sk_remove(struct tipc_sock *tsk)
2710 struct sock *sk = &tsk->sk;
2711 struct tipc_net *tn = net_generic(sock_net(sk), tipc_net_id);
2713 if (!rhashtable_remove_fast(&tn->sk_rht, &tsk->node, tsk_rht_params)) {
2714 WARN_ON(refcount_read(&sk->sk_refcnt) == 1);
2719 static const struct rhashtable_params tsk_rht_params = {
2721 .head_offset = offsetof(struct tipc_sock, node),
2722 .key_offset = offsetof(struct tipc_sock, portid),
2723 .key_len = sizeof(u32), /* portid */
2724 .max_size = 1048576,
2726 .automatic_shrinking = true,
2729 int tipc_sk_rht_init(struct net *net)
2731 struct tipc_net *tn = net_generic(net, tipc_net_id);
2733 return rhashtable_init(&tn->sk_rht, &tsk_rht_params);
2736 void tipc_sk_rht_destroy(struct net *net)
2738 struct tipc_net *tn = net_generic(net, tipc_net_id);
2740 /* Wait for socket readers to complete */
2743 rhashtable_destroy(&tn->sk_rht);
2746 static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq)
2748 struct net *net = sock_net(&tsk->sk);
2749 struct tipc_group *grp = tsk->group;
2750 struct tipc_msg *hdr = &tsk->phdr;
2751 struct tipc_name_seq seq;
2754 if (mreq->type < TIPC_RESERVED_TYPES)
2756 if (mreq->scope > TIPC_NODE_SCOPE)
2760 grp = tipc_group_create(net, tsk->portid, mreq, &tsk->group_is_open);
2764 msg_set_lookup_scope(hdr, mreq->scope);
2765 msg_set_nametype(hdr, mreq->type);
2766 msg_set_dest_droppable(hdr, true);
2767 seq.type = mreq->type;
2768 seq.lower = mreq->instance;
2769 seq.upper = seq.lower;
2770 tipc_nametbl_build_group(net, grp, mreq->type, mreq->scope);
2771 rc = tipc_sk_publish(tsk, mreq->scope, &seq);
2773 tipc_group_delete(net, grp);
2777 /* Eliminate any risk that a broadcast overtakes sent JOINs */
2778 tsk->mc_method.rcast = true;
2779 tsk->mc_method.mandatory = true;
2780 tipc_group_join(net, grp, &tsk->sk.sk_rcvbuf);
2784 static int tipc_sk_leave(struct tipc_sock *tsk)
2786 struct net *net = sock_net(&tsk->sk);
2787 struct tipc_group *grp = tsk->group;
2788 struct tipc_name_seq seq;
2793 tipc_group_self(grp, &seq, &scope);
2794 tipc_group_delete(net, grp);
2796 tipc_sk_withdraw(tsk, scope, &seq);
2801 * tipc_setsockopt - set socket option
2802 * @sock: socket structure
2803 * @lvl: option level
2804 * @opt: option identifier
2805 * @ov: pointer to new option value
2806 * @ol: length of option value
2808 * For stream sockets only, accepts and ignores all IPPROTO_TCP options
2809 * (to ease compatibility).
2811 * Returns 0 on success, errno otherwise
2813 static int tipc_setsockopt(struct socket *sock, int lvl, int opt,
2814 char __user *ov, unsigned int ol)
2816 struct sock *sk = sock->sk;
2817 struct tipc_sock *tsk = tipc_sk(sk);
2818 struct tipc_group_req mreq;
2822 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
2824 if (lvl != SOL_TIPC)
2825 return -ENOPROTOOPT;
2828 case TIPC_IMPORTANCE:
2829 case TIPC_SRC_DROPPABLE:
2830 case TIPC_DEST_DROPPABLE:
2831 case TIPC_CONN_TIMEOUT:
2832 if (ol < sizeof(value))
2834 if (get_user(value, (u32 __user *)ov))
2837 case TIPC_GROUP_JOIN:
2838 if (ol < sizeof(mreq))
2840 if (copy_from_user(&mreq, ov, sizeof(mreq)))
2851 case TIPC_IMPORTANCE:
2852 res = tsk_set_importance(tsk, value);
2854 case TIPC_SRC_DROPPABLE:
2855 if (sock->type != SOCK_STREAM)
2856 tsk_set_unreliable(tsk, value);
2860 case TIPC_DEST_DROPPABLE:
2861 tsk_set_unreturnable(tsk, value);
2863 case TIPC_CONN_TIMEOUT:
2864 tipc_sk(sk)->conn_timeout = value;
2866 case TIPC_MCAST_BROADCAST:
2867 tsk->mc_method.rcast = false;
2868 tsk->mc_method.mandatory = true;
2870 case TIPC_MCAST_REPLICAST:
2871 tsk->mc_method.rcast = true;
2872 tsk->mc_method.mandatory = true;
2874 case TIPC_GROUP_JOIN:
2875 res = tipc_sk_join(tsk, &mreq);
2877 case TIPC_GROUP_LEAVE:
2878 res = tipc_sk_leave(tsk);
2890 * tipc_getsockopt - get socket option
2891 * @sock: socket structure
2892 * @lvl: option level
2893 * @opt: option identifier
2894 * @ov: receptacle for option value
2895 * @ol: receptacle for length of option value
2897 * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
2898 * (to ease compatibility).
2900 * Returns 0 on success, errno otherwise
2902 static int tipc_getsockopt(struct socket *sock, int lvl, int opt,
2903 char __user *ov, int __user *ol)
2905 struct sock *sk = sock->sk;
2906 struct tipc_sock *tsk = tipc_sk(sk);
2907 struct tipc_name_seq seq;
2912 if ((lvl == IPPROTO_TCP) && (sock->type == SOCK_STREAM))
2913 return put_user(0, ol);
2914 if (lvl != SOL_TIPC)
2915 return -ENOPROTOOPT;
2916 res = get_user(len, ol);
2923 case TIPC_IMPORTANCE:
2924 value = tsk_importance(tsk);
2926 case TIPC_SRC_DROPPABLE:
2927 value = tsk_unreliable(tsk);
2929 case TIPC_DEST_DROPPABLE:
2930 value = tsk_unreturnable(tsk);
2932 case TIPC_CONN_TIMEOUT:
2933 value = tsk->conn_timeout;
2934 /* no need to set "res", since already 0 at this point */
2936 case TIPC_NODE_RECVQ_DEPTH:
2937 value = 0; /* was tipc_queue_size, now obsolete */
2939 case TIPC_SOCK_RECVQ_DEPTH:
2940 value = skb_queue_len(&sk->sk_receive_queue);
2942 case TIPC_GROUP_JOIN:
2945 tipc_group_self(tsk->group, &seq, &scope);
2955 return res; /* "get" failed */
2957 if (len < sizeof(value))
2960 if (copy_to_user(ov, &value, sizeof(value)))
2963 return put_user(sizeof(value), ol);
2966 static int tipc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
2968 struct sock *sk = sock->sk;
2969 struct tipc_sioc_ln_req lnr;
2970 void __user *argp = (void __user *)arg;
2973 case SIOCGETLINKNAME:
2974 if (copy_from_user(&lnr, argp, sizeof(lnr)))
2976 if (!tipc_node_get_linkname(sock_net(sk),
2977 lnr.bearer_id & 0xffff, lnr.peer,
2978 lnr.linkname, TIPC_MAX_LINK_NAME)) {
2979 if (copy_to_user(argp, &lnr, sizeof(lnr)))
2983 return -EADDRNOTAVAIL;
2985 return -ENOIOCTLCMD;
2989 static int tipc_socketpair(struct socket *sock1, struct socket *sock2)
2991 struct tipc_sock *tsk2 = tipc_sk(sock2->sk);
2992 struct tipc_sock *tsk1 = tipc_sk(sock1->sk);
2993 u32 onode = tipc_own_addr(sock_net(sock1->sk));
2995 tsk1->peer.family = AF_TIPC;
2996 tsk1->peer.addrtype = TIPC_ADDR_ID;
2997 tsk1->peer.scope = TIPC_NODE_SCOPE;
2998 tsk1->peer.addr.id.ref = tsk2->portid;
2999 tsk1->peer.addr.id.node = onode;
3000 tsk2->peer.family = AF_TIPC;
3001 tsk2->peer.addrtype = TIPC_ADDR_ID;
3002 tsk2->peer.scope = TIPC_NODE_SCOPE;
3003 tsk2->peer.addr.id.ref = tsk1->portid;
3004 tsk2->peer.addr.id.node = onode;
3006 tipc_sk_finish_conn(tsk1, tsk2->portid, onode);
3007 tipc_sk_finish_conn(tsk2, tsk1->portid, onode);
3011 /* Protocol switches for the various types of TIPC sockets */
3013 static const struct proto_ops msg_ops = {
3014 .owner = THIS_MODULE,
3016 .release = tipc_release,
3018 .connect = tipc_connect,
3019 .socketpair = tipc_socketpair,
3020 .accept = sock_no_accept,
3021 .getname = tipc_getname,
3023 .ioctl = tipc_ioctl,
3024 .listen = sock_no_listen,
3025 .shutdown = tipc_shutdown,
3026 .setsockopt = tipc_setsockopt,
3027 .getsockopt = tipc_getsockopt,
3028 .sendmsg = tipc_sendmsg,
3029 .recvmsg = tipc_recvmsg,
3030 .mmap = sock_no_mmap,
3031 .sendpage = sock_no_sendpage
3034 static const struct proto_ops packet_ops = {
3035 .owner = THIS_MODULE,
3037 .release = tipc_release,
3039 .connect = tipc_connect,
3040 .socketpair = tipc_socketpair,
3041 .accept = tipc_accept,
3042 .getname = tipc_getname,
3044 .ioctl = tipc_ioctl,
3045 .listen = tipc_listen,
3046 .shutdown = tipc_shutdown,
3047 .setsockopt = tipc_setsockopt,
3048 .getsockopt = tipc_getsockopt,
3049 .sendmsg = tipc_send_packet,
3050 .recvmsg = tipc_recvmsg,
3051 .mmap = sock_no_mmap,
3052 .sendpage = sock_no_sendpage
3055 static const struct proto_ops stream_ops = {
3056 .owner = THIS_MODULE,
3058 .release = tipc_release,
3060 .connect = tipc_connect,
3061 .socketpair = tipc_socketpair,
3062 .accept = tipc_accept,
3063 .getname = tipc_getname,
3065 .ioctl = tipc_ioctl,
3066 .listen = tipc_listen,
3067 .shutdown = tipc_shutdown,
3068 .setsockopt = tipc_setsockopt,
3069 .getsockopt = tipc_getsockopt,
3070 .sendmsg = tipc_sendstream,
3071 .recvmsg = tipc_recvstream,
3072 .mmap = sock_no_mmap,
3073 .sendpage = sock_no_sendpage
3076 static const struct net_proto_family tipc_family_ops = {
3077 .owner = THIS_MODULE,
3079 .create = tipc_sk_create
3082 static struct proto tipc_proto = {
3084 .owner = THIS_MODULE,
3085 .obj_size = sizeof(struct tipc_sock),
3086 .sysctl_rmem = sysctl_tipc_rmem
3090 * tipc_socket_init - initialize TIPC socket interface
3092 * Returns 0 on success, errno otherwise
3094 int tipc_socket_init(void)
3098 res = proto_register(&tipc_proto, 1);
3100 pr_err("Failed to register TIPC protocol type\n");
3104 res = sock_register(&tipc_family_ops);
3106 pr_err("Failed to register TIPC socket type\n");
3107 proto_unregister(&tipc_proto);
3115 * tipc_socket_stop - stop TIPC socket interface
3117 void tipc_socket_stop(void)
3119 sock_unregister(tipc_family_ops.family);
3120 proto_unregister(&tipc_proto);
3123 /* Caller should hold socket lock for the passed tipc socket. */
3124 static int __tipc_nl_add_sk_con(struct sk_buff *skb, struct tipc_sock *tsk)
3128 struct nlattr *nest;
3130 peer_node = tsk_peer_node(tsk);
3131 peer_port = tsk_peer_port(tsk);
3133 nest = nla_nest_start(skb, TIPC_NLA_SOCK_CON);
3135 if (nla_put_u32(skb, TIPC_NLA_CON_NODE, peer_node))
3137 if (nla_put_u32(skb, TIPC_NLA_CON_SOCK, peer_port))
3140 if (tsk->conn_type != 0) {
3141 if (nla_put_flag(skb, TIPC_NLA_CON_FLAG))
3143 if (nla_put_u32(skb, TIPC_NLA_CON_TYPE, tsk->conn_type))
3145 if (nla_put_u32(skb, TIPC_NLA_CON_INST, tsk->conn_instance))
3148 nla_nest_end(skb, nest);
3153 nla_nest_cancel(skb, nest);
3158 /* Caller should hold socket lock for the passed tipc socket. */
3159 static int __tipc_nl_add_sk(struct sk_buff *skb, struct netlink_callback *cb,
3160 struct tipc_sock *tsk)
3164 struct nlattr *attrs;
3165 struct net *net = sock_net(skb->sk);
3166 struct tipc_net *tn = net_generic(net, tipc_net_id);
3167 struct sock *sk = &tsk->sk;
3169 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3170 &tipc_genl_family, NLM_F_MULTI, TIPC_NL_SOCK_GET);
3174 attrs = nla_nest_start(skb, TIPC_NLA_SOCK);
3176 goto genlmsg_cancel;
3177 if (nla_put_u32(skb, TIPC_NLA_SOCK_REF, tsk->portid))
3178 goto attr_msg_cancel;
3179 if (nla_put_u32(skb, TIPC_NLA_SOCK_ADDR, tn->own_addr))
3180 goto attr_msg_cancel;
3182 if (tipc_sk_connected(sk)) {
3183 err = __tipc_nl_add_sk_con(skb, tsk);
3185 goto attr_msg_cancel;
3186 } else if (!list_empty(&tsk->publications)) {
3187 if (nla_put_flag(skb, TIPC_NLA_SOCK_HAS_PUBL))
3188 goto attr_msg_cancel;
3190 nla_nest_end(skb, attrs);
3191 genlmsg_end(skb, hdr);
3196 nla_nest_cancel(skb, attrs);
3198 genlmsg_cancel(skb, hdr);
3203 int tipc_nl_sk_dump(struct sk_buff *skb, struct netlink_callback *cb)
3206 struct tipc_sock *tsk;
3207 const struct bucket_table *tbl;
3208 struct rhash_head *pos;
3209 struct net *net = sock_net(skb->sk);
3210 struct tipc_net *tn = net_generic(net, tipc_net_id);
3211 u32 tbl_id = cb->args[0];
3212 u32 prev_portid = cb->args[1];
3215 tbl = rht_dereference_rcu((&tn->sk_rht)->tbl, &tn->sk_rht);
3216 for (; tbl_id < tbl->size; tbl_id++) {
3217 rht_for_each_entry_rcu(tsk, pos, tbl, tbl_id, node) {
3218 spin_lock_bh(&tsk->sk.sk_lock.slock);
3219 if (prev_portid && prev_portid != tsk->portid) {
3220 spin_unlock_bh(&tsk->sk.sk_lock.slock);
3224 err = __tipc_nl_add_sk(skb, cb, tsk);
3226 prev_portid = tsk->portid;
3227 spin_unlock_bh(&tsk->sk.sk_lock.slock);
3231 spin_unlock_bh(&tsk->sk.sk_lock.slock);
3236 cb->args[0] = tbl_id;
3237 cb->args[1] = prev_portid;
3242 /* Caller should hold socket lock for the passed tipc socket. */
3243 static int __tipc_nl_add_sk_publ(struct sk_buff *skb,
3244 struct netlink_callback *cb,
3245 struct publication *publ)
3248 struct nlattr *attrs;
3250 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3251 &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET);
3255 attrs = nla_nest_start(skb, TIPC_NLA_PUBL);
3257 goto genlmsg_cancel;
3259 if (nla_put_u32(skb, TIPC_NLA_PUBL_KEY, publ->key))
3260 goto attr_msg_cancel;
3261 if (nla_put_u32(skb, TIPC_NLA_PUBL_TYPE, publ->type))
3262 goto attr_msg_cancel;
3263 if (nla_put_u32(skb, TIPC_NLA_PUBL_LOWER, publ->lower))
3264 goto attr_msg_cancel;
3265 if (nla_put_u32(skb, TIPC_NLA_PUBL_UPPER, publ->upper))
3266 goto attr_msg_cancel;
3268 nla_nest_end(skb, attrs);
3269 genlmsg_end(skb, hdr);
3274 nla_nest_cancel(skb, attrs);
3276 genlmsg_cancel(skb, hdr);
3281 /* Caller should hold socket lock for the passed tipc socket. */
3282 static int __tipc_nl_list_sk_publ(struct sk_buff *skb,
3283 struct netlink_callback *cb,
3284 struct tipc_sock *tsk, u32 *last_publ)
3287 struct publication *p;
3290 list_for_each_entry(p, &tsk->publications, pport_list) {
3291 if (p->key == *last_publ)
3294 if (p->key != *last_publ) {
3295 /* We never set seq or call nl_dump_check_consistent()
3296 * this means that setting prev_seq here will cause the
3297 * consistence check to fail in the netlink callback
3298 * handler. Resulting in the last NLMSG_DONE message
3299 * having the NLM_F_DUMP_INTR flag set.
3306 p = list_first_entry(&tsk->publications, struct publication,
3310 list_for_each_entry_from(p, &tsk->publications, pport_list) {
3311 err = __tipc_nl_add_sk_publ(skb, cb, p);
3313 *last_publ = p->key;
3322 int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb)
3325 u32 tsk_portid = cb->args[0];
3326 u32 last_publ = cb->args[1];
3327 u32 done = cb->args[2];
3328 struct net *net = sock_net(skb->sk);
3329 struct tipc_sock *tsk;
3332 struct nlattr **attrs;
3333 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
3335 err = tipc_nlmsg_parse(cb->nlh, &attrs);
3339 if (!attrs[TIPC_NLA_SOCK])
3342 err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX,
3343 attrs[TIPC_NLA_SOCK],
3344 tipc_nl_sock_policy, NULL);
3348 if (!sock[TIPC_NLA_SOCK_REF])
3351 tsk_portid = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
3357 tsk = tipc_sk_lookup(net, tsk_portid);
3361 lock_sock(&tsk->sk);
3362 err = __tipc_nl_list_sk_publ(skb, cb, tsk, &last_publ);
3365 release_sock(&tsk->sk);
3368 cb->args[0] = tsk_portid;
3369 cb->args[1] = last_publ;