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
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
37 #include <linux/rhashtable.h>
38 #include <linux/sched/signal.h>
41 #include "name_table.h"
44 #include "name_distr.h"
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 u32 self
= tipc_own_addr(sock_net(sk
));
293 u32 peer_port
= tsk_peer_port(tsk
);
294 u32 orig_node
, peer_node
;
296 if (unlikely(!tipc_sk_connected(sk
)))
299 if (unlikely(msg_origport(msg
) != peer_port
))
302 orig_node
= msg_orignode(msg
);
303 peer_node
= tsk_peer_node(tsk
);
305 if (likely(orig_node
== peer_node
))
308 if (!orig_node
&& peer_node
== self
)
311 if (!peer_node
&& orig_node
== self
)
317 /* tipc_set_sk_state - set the sk_state of the socket
320 * Caller must hold socket lock
322 * Returns 0 on success, errno otherwise
324 static int tipc_set_sk_state(struct sock
*sk
, int state
)
326 int oldsk_state
= sk
->sk_state
;
334 case TIPC_CONNECTING
:
335 if (oldsk_state
== TIPC_OPEN
)
338 case TIPC_ESTABLISHED
:
339 if (oldsk_state
== TIPC_CONNECTING
||
340 oldsk_state
== TIPC_OPEN
)
343 case TIPC_DISCONNECTING
:
344 if (oldsk_state
== TIPC_CONNECTING
||
345 oldsk_state
== TIPC_ESTABLISHED
)
351 sk
->sk_state
= state
;
356 static int tipc_sk_sock_err(struct socket
*sock
, long *timeout
)
358 struct sock
*sk
= sock
->sk
;
359 int err
= sock_error(sk
);
360 int typ
= sock
->type
;
364 if (typ
== SOCK_STREAM
|| typ
== SOCK_SEQPACKET
) {
365 if (sk
->sk_state
== TIPC_DISCONNECTING
)
367 else if (!tipc_sk_connected(sk
))
372 if (signal_pending(current
))
373 return sock_intr_errno(*timeout
);
378 #define tipc_wait_for_cond(sock_, timeo_, condition_) \
383 while ((rc_ = !(condition_))) { \
384 DEFINE_WAIT_FUNC(wait_, woken_wake_function); \
386 rc_ = tipc_sk_sock_err((sock_), timeo_); \
389 prepare_to_wait(sk_sleep(sk_), &wait_, TASK_INTERRUPTIBLE); \
391 *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \
392 sched_annotate_sleep(); \
394 remove_wait_queue(sk_sleep(sk_), &wait_); \
400 * tipc_sk_create - create a TIPC socket
401 * @net: network namespace (must be default network)
402 * @sock: pre-allocated socket structure
403 * @protocol: protocol indicator (must be 0)
404 * @kern: caused by kernel or by userspace?
406 * This routine creates additional data structures used by the TIPC socket,
407 * initializes them, and links them together.
409 * Returns 0 on success, errno otherwise
411 static int tipc_sk_create(struct net
*net
, struct socket
*sock
,
412 int protocol
, int kern
)
415 const struct proto_ops
*ops
;
417 struct tipc_sock
*tsk
;
418 struct tipc_msg
*msg
;
420 /* Validate arguments */
421 if (unlikely(protocol
!= 0))
422 return -EPROTONOSUPPORT
;
424 switch (sock
->type
) {
439 /* Allocate socket's protocol area */
440 sk
= sk_alloc(net
, AF_TIPC
, GFP_KERNEL
, &tipc_proto
, kern
);
445 tsk
->max_pkt
= MAX_PKT_DEFAULT
;
446 INIT_LIST_HEAD(&tsk
->publications
);
447 INIT_LIST_HEAD(&tsk
->cong_links
);
449 tn
= net_generic(sock_net(sk
), tipc_net_id
);
451 /* Finish initializing socket data structures */
453 sock_init_data(sock
, sk
);
454 tipc_set_sk_state(sk
, TIPC_OPEN
);
455 if (tipc_sk_insert(tsk
)) {
456 pr_warn("Socket create failed; port number exhausted\n");
460 /* Ensure tsk is visible before we read own_addr. */
463 tipc_msg_init(tipc_own_addr(net
), msg
, TIPC_LOW_IMPORTANCE
,
464 TIPC_NAMED_MSG
, NAMED_H_SIZE
, 0);
466 msg_set_origport(msg
, tsk
->portid
);
467 timer_setup(&sk
->sk_timer
, tipc_sk_timeout
, 0);
469 sk
->sk_backlog_rcv
= tipc_sk_backlog_rcv
;
470 sk
->sk_rcvbuf
= sysctl_tipc_rmem
[1];
471 sk
->sk_data_ready
= tipc_data_ready
;
472 sk
->sk_write_space
= tipc_write_space
;
473 sk
->sk_destruct
= tipc_sock_destruct
;
474 tsk
->conn_timeout
= CONN_TIMEOUT_DEFAULT
;
475 tsk
->group_is_open
= true;
476 atomic_set(&tsk
->dupl_rcvcnt
, 0);
478 /* Start out with safe limits until we receive an advertised window */
479 tsk
->snd_win
= tsk_adv_blocks(RCVBUF_MIN
);
480 tsk
->rcv_win
= tsk
->snd_win
;
482 if (tipc_sk_type_connectionless(sk
)) {
483 tsk_set_unreturnable(tsk
, true);
484 if (sock
->type
== SOCK_DGRAM
)
485 tsk_set_unreliable(tsk
, true);
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
,
670 struct sockaddr_tipc
*addr
= (struct sockaddr_tipc
*)uaddr
;
671 struct sock
*sk
= sock
->sk
;
672 struct tipc_sock
*tsk
= tipc_sk(sk
);
674 memset(addr
, 0, sizeof(*addr
));
676 if ((!tipc_sk_connected(sk
)) &&
677 ((peer
!= 2) || (sk
->sk_state
!= TIPC_DISCONNECTING
)))
679 addr
->addr
.id
.ref
= tsk_peer_port(tsk
);
680 addr
->addr
.id
.node
= tsk_peer_node(tsk
);
682 addr
->addr
.id
.ref
= tsk
->portid
;
683 addr
->addr
.id
.node
= tipc_own_addr(sock_net(sk
));
686 addr
->addrtype
= TIPC_ADDR_ID
;
687 addr
->family
= AF_TIPC
;
689 addr
->addr
.name
.domain
= 0;
691 return sizeof(*addr
);
695 * tipc_poll - read and possibly block on pollmask
696 * @file: file structure associated with the socket
697 * @sock: socket for which to calculate the poll bits
700 * Returns pollmask value
703 * It appears that the usual socket locking mechanisms are not useful here
704 * since the pollmask info is potentially out-of-date the moment this routine
705 * exits. TCP and other protocols seem to rely on higher level poll routines
706 * to handle any preventable race conditions, so TIPC will do the same ...
708 * IMPORTANT: The fact that a read or write operation is indicated does NOT
709 * imply that the operation will succeed, merely that it should be performed
710 * and will not block.
712 static __poll_t
tipc_poll(struct file
*file
, struct socket
*sock
,
715 struct sock
*sk
= sock
->sk
;
716 struct tipc_sock
*tsk
= tipc_sk(sk
);
717 __poll_t revents
= 0;
719 sock_poll_wait(file
, sk_sleep(sk
), wait
);
721 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
722 revents
|= EPOLLRDHUP
| EPOLLIN
| EPOLLRDNORM
;
723 if (sk
->sk_shutdown
== SHUTDOWN_MASK
)
726 switch (sk
->sk_state
) {
727 case TIPC_ESTABLISHED
:
728 case TIPC_CONNECTING
:
729 if (!tsk
->cong_link_cnt
&& !tsk_conn_cong(tsk
))
733 if (!skb_queue_empty(&sk
->sk_receive_queue
))
734 revents
|= EPOLLIN
| EPOLLRDNORM
;
737 if (tsk
->group_is_open
&& !tsk
->cong_link_cnt
)
739 if (!tipc_sk_type_connectionless(sk
))
741 if (skb_queue_empty(&sk
->sk_receive_queue
))
743 revents
|= EPOLLIN
| EPOLLRDNORM
;
745 case TIPC_DISCONNECTING
:
746 revents
= EPOLLIN
| EPOLLRDNORM
| EPOLLHUP
;
753 * tipc_sendmcast - send multicast message
754 * @sock: socket structure
755 * @seq: destination address
756 * @msg: message to send
757 * @dlen: length of data to send
758 * @timeout: timeout to wait for wakeup
760 * Called from function tipc_sendmsg(), which has done all sanity checks
761 * Returns the number of bytes sent on success, or errno
763 static int tipc_sendmcast(struct socket
*sock
, struct tipc_name_seq
*seq
,
764 struct msghdr
*msg
, size_t dlen
, long timeout
)
766 struct sock
*sk
= sock
->sk
;
767 struct tipc_sock
*tsk
= tipc_sk(sk
);
768 struct tipc_msg
*hdr
= &tsk
->phdr
;
769 struct net
*net
= sock_net(sk
);
770 int mtu
= tipc_bcast_get_mtu(net
);
771 struct tipc_mc_method
*method
= &tsk
->mc_method
;
772 struct sk_buff_head pkts
;
773 struct tipc_nlist dsts
;
779 /* Block or return if any destination link is congested */
780 rc
= tipc_wait_for_cond(sock
, &timeout
, !tsk
->cong_link_cnt
);
784 /* Lookup destination nodes */
785 tipc_nlist_init(&dsts
, tipc_own_addr(net
));
786 tipc_nametbl_lookup_dst_nodes(net
, seq
->type
, seq
->lower
,
788 if (!dsts
.local
&& !dsts
.remote
)
789 return -EHOSTUNREACH
;
791 /* Build message header */
792 msg_set_type(hdr
, TIPC_MCAST_MSG
);
793 msg_set_hdr_sz(hdr
, MCAST_H_SIZE
);
794 msg_set_lookup_scope(hdr
, TIPC_CLUSTER_SCOPE
);
795 msg_set_destport(hdr
, 0);
796 msg_set_destnode(hdr
, 0);
797 msg_set_nametype(hdr
, seq
->type
);
798 msg_set_namelower(hdr
, seq
->lower
);
799 msg_set_nameupper(hdr
, seq
->upper
);
801 /* Build message as chain of buffers */
802 skb_queue_head_init(&pkts
);
803 rc
= tipc_msg_build(hdr
, msg
, 0, dlen
, mtu
, &pkts
);
805 /* Send message if build was successful */
806 if (unlikely(rc
== dlen
))
807 rc
= tipc_mcast_xmit(net
, &pkts
, method
, &dsts
,
808 &tsk
->cong_link_cnt
);
810 tipc_nlist_purge(&dsts
);
812 return rc
? rc
: dlen
;
816 * tipc_send_group_msg - send a message to a member in the group
817 * @net: network namespace
818 * @m: message to send
820 * @dnode: destination node
821 * @dport: destination port
822 * @dlen: total length of message data
824 static int tipc_send_group_msg(struct net
*net
, struct tipc_sock
*tsk
,
825 struct msghdr
*m
, struct tipc_member
*mb
,
826 u32 dnode
, u32 dport
, int dlen
)
828 u16 bc_snd_nxt
= tipc_group_bc_snd_nxt(tsk
->group
);
829 struct tipc_mc_method
*method
= &tsk
->mc_method
;
830 int blks
= tsk_blocks(GROUP_H_SIZE
+ dlen
);
831 struct tipc_msg
*hdr
= &tsk
->phdr
;
832 struct sk_buff_head pkts
;
835 /* Complete message header */
836 msg_set_type(hdr
, TIPC_GRP_UCAST_MSG
);
837 msg_set_hdr_sz(hdr
, GROUP_H_SIZE
);
838 msg_set_destport(hdr
, dport
);
839 msg_set_destnode(hdr
, dnode
);
840 msg_set_grp_bc_seqno(hdr
, bc_snd_nxt
);
842 /* Build message as chain of buffers */
843 skb_queue_head_init(&pkts
);
844 mtu
= tipc_node_get_mtu(net
, dnode
, tsk
->portid
);
845 rc
= tipc_msg_build(hdr
, m
, 0, dlen
, mtu
, &pkts
);
846 if (unlikely(rc
!= dlen
))
850 rc
= tipc_node_xmit(net
, &pkts
, dnode
, tsk
->portid
);
851 if (unlikely(rc
== -ELINKCONG
)) {
852 tipc_dest_push(&tsk
->cong_links
, dnode
, 0);
853 tsk
->cong_link_cnt
++;
856 /* Update send window */
857 tipc_group_update_member(mb
, blks
);
859 /* A broadcast sent within next EXPIRE period must follow same path */
860 method
->rcast
= true;
861 method
->mandatory
= true;
866 * tipc_send_group_unicast - send message to a member in the group
867 * @sock: socket structure
868 * @m: message to send
869 * @dlen: total length of message data
870 * @timeout: timeout to wait for wakeup
872 * Called from function tipc_sendmsg(), which has done all sanity checks
873 * Returns the number of bytes sent on success, or errno
875 static int tipc_send_group_unicast(struct socket
*sock
, struct msghdr
*m
,
876 int dlen
, long timeout
)
878 struct sock
*sk
= sock
->sk
;
879 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
880 int blks
= tsk_blocks(GROUP_H_SIZE
+ dlen
);
881 struct tipc_sock
*tsk
= tipc_sk(sk
);
882 struct tipc_group
*grp
= tsk
->group
;
883 struct net
*net
= sock_net(sk
);
884 struct tipc_member
*mb
= NULL
;
888 node
= dest
->addr
.id
.node
;
889 port
= dest
->addr
.id
.ref
;
891 return -EHOSTUNREACH
;
893 /* Block or return if destination link or member is congested */
894 rc
= tipc_wait_for_cond(sock
, &timeout
,
895 !tipc_dest_find(&tsk
->cong_links
, node
, 0) &&
896 !tipc_group_cong(grp
, node
, port
, blks
, &mb
));
901 return -EHOSTUNREACH
;
903 rc
= tipc_send_group_msg(net
, tsk
, m
, mb
, node
, port
, dlen
);
905 return rc
? rc
: dlen
;
909 * tipc_send_group_anycast - send message to any member with given identity
910 * @sock: socket structure
911 * @m: message to send
912 * @dlen: total length of message data
913 * @timeout: timeout to wait for wakeup
915 * Called from function tipc_sendmsg(), which has done all sanity checks
916 * Returns the number of bytes sent on success, or errno
918 static int tipc_send_group_anycast(struct socket
*sock
, struct msghdr
*m
,
919 int dlen
, long timeout
)
921 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
922 struct sock
*sk
= sock
->sk
;
923 struct tipc_sock
*tsk
= tipc_sk(sk
);
924 struct list_head
*cong_links
= &tsk
->cong_links
;
925 int blks
= tsk_blocks(GROUP_H_SIZE
+ dlen
);
926 struct tipc_group
*grp
= tsk
->group
;
927 struct tipc_msg
*hdr
= &tsk
->phdr
;
928 struct tipc_member
*first
= NULL
;
929 struct tipc_member
*mbr
= NULL
;
930 struct net
*net
= sock_net(sk
);
931 u32 node
, port
, exclude
;
932 struct list_head dsts
;
933 u32 type
, inst
, scope
;
938 INIT_LIST_HEAD(&dsts
);
940 type
= msg_nametype(hdr
);
941 inst
= dest
->addr
.name
.name
.instance
;
942 scope
= msg_lookup_scope(hdr
);
943 exclude
= tipc_group_exclude(grp
);
945 while (++lookups
< 4) {
948 /* Look for a non-congested destination member, if any */
950 if (!tipc_nametbl_lookup(net
, type
, inst
, scope
, &dsts
,
951 &dstcnt
, exclude
, false))
952 return -EHOSTUNREACH
;
953 tipc_dest_pop(&dsts
, &node
, &port
);
954 cong
= tipc_group_cong(grp
, node
, port
, blks
, &mbr
);
963 /* Start over if destination was not in member list */
967 if (likely(!cong
&& !tipc_dest_find(cong_links
, node
, 0)))
970 /* Block or return if destination link or member is congested */
971 rc
= tipc_wait_for_cond(sock
, &timeout
,
972 !tipc_dest_find(cong_links
, node
, 0) &&
973 !tipc_group_cong(grp
, node
, port
,
978 /* Send, unless destination disappeared while waiting */
983 if (unlikely(lookups
>= 4))
984 return -EHOSTUNREACH
;
986 rc
= tipc_send_group_msg(net
, tsk
, m
, mbr
, node
, port
, dlen
);
988 return rc
? rc
: dlen
;
992 * tipc_send_group_bcast - send message to all members in communication group
993 * @sk: socket structure
994 * @m: message to send
995 * @dlen: total length of message data
996 * @timeout: timeout to wait for wakeup
998 * Called from function tipc_sendmsg(), which has done all sanity checks
999 * Returns the number of bytes sent on success, or errno
1001 static int tipc_send_group_bcast(struct socket
*sock
, struct msghdr
*m
,
1002 int dlen
, long timeout
)
1004 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
1005 struct sock
*sk
= sock
->sk
;
1006 struct net
*net
= sock_net(sk
);
1007 struct tipc_sock
*tsk
= tipc_sk(sk
);
1008 struct tipc_group
*grp
= tsk
->group
;
1009 struct tipc_nlist
*dsts
= tipc_group_dests(grp
);
1010 struct tipc_mc_method
*method
= &tsk
->mc_method
;
1011 bool ack
= method
->mandatory
&& method
->rcast
;
1012 int blks
= tsk_blocks(MCAST_H_SIZE
+ dlen
);
1013 struct tipc_msg
*hdr
= &tsk
->phdr
;
1014 int mtu
= tipc_bcast_get_mtu(net
);
1015 struct sk_buff_head pkts
;
1016 int rc
= -EHOSTUNREACH
;
1018 if (!dsts
->local
&& !dsts
->remote
)
1019 return -EHOSTUNREACH
;
1021 /* Block or return if any destination link or member is congested */
1022 rc
= tipc_wait_for_cond(sock
, &timeout
, !tsk
->cong_link_cnt
&&
1023 !tipc_group_bc_cong(grp
, blks
));
1027 /* Complete message header */
1029 msg_set_type(hdr
, TIPC_GRP_MCAST_MSG
);
1030 msg_set_nameinst(hdr
, dest
->addr
.name
.name
.instance
);
1032 msg_set_type(hdr
, TIPC_GRP_BCAST_MSG
);
1033 msg_set_nameinst(hdr
, 0);
1035 msg_set_hdr_sz(hdr
, GROUP_H_SIZE
);
1036 msg_set_destport(hdr
, 0);
1037 msg_set_destnode(hdr
, 0);
1038 msg_set_grp_bc_seqno(hdr
, tipc_group_bc_snd_nxt(grp
));
1040 /* Avoid getting stuck with repeated forced replicasts */
1041 msg_set_grp_bc_ack_req(hdr
, ack
);
1043 /* Build message as chain of buffers */
1044 skb_queue_head_init(&pkts
);
1045 rc
= tipc_msg_build(hdr
, m
, 0, dlen
, mtu
, &pkts
);
1046 if (unlikely(rc
!= dlen
))
1050 rc
= tipc_mcast_xmit(net
, &pkts
, method
, dsts
, &tsk
->cong_link_cnt
);
1054 /* Update broadcast sequence number and send windows */
1055 tipc_group_update_bc_members(tsk
->group
, blks
, ack
);
1057 /* Broadcast link is now free to choose method for next broadcast */
1058 method
->mandatory
= false;
1059 method
->expires
= jiffies
;
1065 * tipc_send_group_mcast - send message to all members with given identity
1066 * @sock: socket structure
1067 * @m: message to send
1068 * @dlen: total length of message data
1069 * @timeout: timeout to wait for wakeup
1071 * Called from function tipc_sendmsg(), which has done all sanity checks
1072 * Returns the number of bytes sent on success, or errno
1074 static int tipc_send_group_mcast(struct socket
*sock
, struct msghdr
*m
,
1075 int dlen
, long timeout
)
1077 struct sock
*sk
= sock
->sk
;
1078 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
1079 struct tipc_sock
*tsk
= tipc_sk(sk
);
1080 struct tipc_group
*grp
= tsk
->group
;
1081 struct tipc_msg
*hdr
= &tsk
->phdr
;
1082 struct net
*net
= sock_net(sk
);
1083 u32 type
, inst
, scope
, exclude
;
1084 struct list_head dsts
;
1087 INIT_LIST_HEAD(&dsts
);
1089 type
= msg_nametype(hdr
);
1090 inst
= dest
->addr
.name
.name
.instance
;
1091 scope
= msg_lookup_scope(hdr
);
1092 exclude
= tipc_group_exclude(grp
);
1094 if (!tipc_nametbl_lookup(net
, type
, inst
, scope
, &dsts
,
1095 &dstcnt
, exclude
, true))
1096 return -EHOSTUNREACH
;
1099 tipc_dest_pop(&dsts
, &dest
->addr
.id
.node
, &dest
->addr
.id
.ref
);
1100 return tipc_send_group_unicast(sock
, m
, dlen
, timeout
);
1103 tipc_dest_list_purge(&dsts
);
1104 return tipc_send_group_bcast(sock
, m
, dlen
, timeout
);
1108 * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets
1109 * @arrvq: queue with arriving messages, to be cloned after destination lookup
1110 * @inputq: queue with cloned messages, delivered to socket after dest lookup
1112 * Multi-threaded: parallel calls with reference to same queues may occur
1114 void tipc_sk_mcast_rcv(struct net
*net
, struct sk_buff_head
*arrvq
,
1115 struct sk_buff_head
*inputq
)
1117 u32 self
= tipc_own_addr(net
);
1118 u32 type
, lower
, upper
, scope
;
1119 struct sk_buff
*skb
, *_skb
;
1120 u32 portid
, oport
, onode
;
1121 struct sk_buff_head tmpq
;
1122 struct list_head dports
;
1123 struct tipc_msg
*hdr
;
1124 int user
, mtyp
, hlen
;
1127 __skb_queue_head_init(&tmpq
);
1128 INIT_LIST_HEAD(&dports
);
1130 skb
= tipc_skb_peek(arrvq
, &inputq
->lock
);
1131 for (; skb
; skb
= tipc_skb_peek(arrvq
, &inputq
->lock
)) {
1133 user
= msg_user(hdr
);
1134 mtyp
= msg_type(hdr
);
1135 hlen
= skb_headroom(skb
) + msg_hdr_sz(hdr
);
1136 oport
= msg_origport(hdr
);
1137 onode
= msg_orignode(hdr
);
1138 type
= msg_nametype(hdr
);
1140 if (mtyp
== TIPC_GRP_UCAST_MSG
|| user
== GROUP_PROTOCOL
) {
1141 spin_lock_bh(&inputq
->lock
);
1142 if (skb_peek(arrvq
) == skb
) {
1143 __skb_dequeue(arrvq
);
1144 __skb_queue_tail(inputq
, skb
);
1147 spin_unlock_bh(&inputq
->lock
);
1151 /* Group messages require exact scope match */
1152 if (msg_in_group(hdr
)) {
1155 scope
= msg_lookup_scope(hdr
);
1158 /* TIPC_NODE_SCOPE means "any scope" in this context */
1160 scope
= TIPC_NODE_SCOPE
;
1162 scope
= TIPC_CLUSTER_SCOPE
;
1164 lower
= msg_namelower(hdr
);
1165 upper
= msg_nameupper(hdr
);
1168 /* Create destination port list: */
1169 tipc_nametbl_mc_lookup(net
, type
, lower
, upper
,
1170 scope
, exact
, &dports
);
1172 /* Clone message per destination */
1173 while (tipc_dest_pop(&dports
, NULL
, &portid
)) {
1174 _skb
= __pskb_copy(skb
, hlen
, GFP_ATOMIC
);
1176 msg_set_destport(buf_msg(_skb
), portid
);
1177 __skb_queue_tail(&tmpq
, _skb
);
1180 pr_warn("Failed to clone mcast rcv buffer\n");
1182 /* Append to inputq if not already done by other thread */
1183 spin_lock_bh(&inputq
->lock
);
1184 if (skb_peek(arrvq
) == skb
) {
1185 skb_queue_splice_tail_init(&tmpq
, inputq
);
1186 kfree_skb(__skb_dequeue(arrvq
));
1188 spin_unlock_bh(&inputq
->lock
);
1189 __skb_queue_purge(&tmpq
);
1192 tipc_sk_rcv(net
, inputq
);
1196 * tipc_sk_conn_proto_rcv - receive a connection mng protocol message
1197 * @tsk: receiving socket
1198 * @skb: pointer to message buffer.
1200 static void tipc_sk_conn_proto_rcv(struct tipc_sock
*tsk
, struct sk_buff
*skb
,
1201 struct sk_buff_head
*xmitq
)
1203 struct tipc_msg
*hdr
= buf_msg(skb
);
1204 u32 onode
= tsk_own_node(tsk
);
1205 struct sock
*sk
= &tsk
->sk
;
1206 int mtyp
= msg_type(hdr
);
1209 /* Ignore if connection cannot be validated: */
1210 if (!tsk_peer_msg(tsk
, hdr
))
1213 if (unlikely(msg_errcode(hdr
))) {
1214 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
1215 tipc_node_remove_conn(sock_net(sk
), tsk_peer_node(tsk
),
1216 tsk_peer_port(tsk
));
1217 sk
->sk_state_change(sk
);
1221 tsk
->probe_unacked
= false;
1223 if (mtyp
== CONN_PROBE
) {
1224 msg_set_type(hdr
, CONN_PROBE_REPLY
);
1225 if (tipc_msg_reverse(onode
, &skb
, TIPC_OK
))
1226 __skb_queue_tail(xmitq
, skb
);
1228 } else if (mtyp
== CONN_ACK
) {
1229 conn_cong
= tsk_conn_cong(tsk
);
1230 tsk
->snt_unacked
-= msg_conn_ack(hdr
);
1231 if (tsk
->peer_caps
& TIPC_BLOCK_FLOWCTL
)
1232 tsk
->snd_win
= msg_adv_win(hdr
);
1234 sk
->sk_write_space(sk
);
1235 } else if (mtyp
!= CONN_PROBE_REPLY
) {
1236 pr_warn("Received unknown CONN_PROTO msg\n");
1243 * tipc_sendmsg - send message in connectionless manner
1244 * @sock: socket structure
1245 * @m: message to send
1246 * @dsz: amount of user data to be sent
1248 * Message must have an destination specified explicitly.
1249 * Used for SOCK_RDM and SOCK_DGRAM messages,
1250 * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
1251 * (Note: 'SYN+' is prohibited on SOCK_STREAM.)
1253 * Returns the number of bytes sent on success, or errno otherwise
1255 static int tipc_sendmsg(struct socket
*sock
,
1256 struct msghdr
*m
, size_t dsz
)
1258 struct sock
*sk
= sock
->sk
;
1262 ret
= __tipc_sendmsg(sock
, m
, dsz
);
1268 static int __tipc_sendmsg(struct socket
*sock
, struct msghdr
*m
, size_t dlen
)
1270 struct sock
*sk
= sock
->sk
;
1271 struct net
*net
= sock_net(sk
);
1272 struct tipc_sock
*tsk
= tipc_sk(sk
);
1273 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
1274 long timeout
= sock_sndtimeo(sk
, m
->msg_flags
& MSG_DONTWAIT
);
1275 struct list_head
*clinks
= &tsk
->cong_links
;
1276 bool syn
= !tipc_sk_type_connectionless(sk
);
1277 struct tipc_group
*grp
= tsk
->group
;
1278 struct tipc_msg
*hdr
= &tsk
->phdr
;
1279 struct tipc_name_seq
*seq
;
1280 struct sk_buff_head pkts
;
1285 if (unlikely(dlen
> TIPC_MAX_USER_MSG_SIZE
))
1289 if (unlikely(m
->msg_namelen
< sizeof(*dest
)))
1291 if (unlikely(dest
->family
!= AF_TIPC
))
1297 return tipc_send_group_bcast(sock
, m
, dlen
, timeout
);
1298 if (dest
->addrtype
== TIPC_ADDR_NAME
)
1299 return tipc_send_group_anycast(sock
, m
, dlen
, timeout
);
1300 if (dest
->addrtype
== TIPC_ADDR_ID
)
1301 return tipc_send_group_unicast(sock
, m
, dlen
, timeout
);
1302 if (dest
->addrtype
== TIPC_ADDR_MCAST
)
1303 return tipc_send_group_mcast(sock
, m
, dlen
, timeout
);
1307 if (unlikely(!dest
)) {
1309 if (!syn
|| dest
->family
!= AF_TIPC
)
1310 return -EDESTADDRREQ
;
1313 if (unlikely(syn
)) {
1314 if (sk
->sk_state
== TIPC_LISTEN
)
1316 if (sk
->sk_state
!= TIPC_OPEN
)
1320 if (dest
->addrtype
== TIPC_ADDR_NAME
) {
1321 tsk
->conn_type
= dest
->addr
.name
.name
.type
;
1322 tsk
->conn_instance
= dest
->addr
.name
.name
.instance
;
1326 seq
= &dest
->addr
.nameseq
;
1327 if (dest
->addrtype
== TIPC_ADDR_MCAST
)
1328 return tipc_sendmcast(sock
, seq
, m
, dlen
, timeout
);
1330 if (dest
->addrtype
== TIPC_ADDR_NAME
) {
1331 type
= dest
->addr
.name
.name
.type
;
1332 inst
= dest
->addr
.name
.name
.instance
;
1333 dnode
= dest
->addr
.name
.domain
;
1334 msg_set_type(hdr
, TIPC_NAMED_MSG
);
1335 msg_set_hdr_sz(hdr
, NAMED_H_SIZE
);
1336 msg_set_nametype(hdr
, type
);
1337 msg_set_nameinst(hdr
, inst
);
1338 msg_set_lookup_scope(hdr
, tipc_node2scope(dnode
));
1339 dport
= tipc_nametbl_translate(net
, type
, inst
, &dnode
);
1340 msg_set_destnode(hdr
, dnode
);
1341 msg_set_destport(hdr
, dport
);
1342 if (unlikely(!dport
&& !dnode
))
1343 return -EHOSTUNREACH
;
1344 } else if (dest
->addrtype
== TIPC_ADDR_ID
) {
1345 dnode
= dest
->addr
.id
.node
;
1346 msg_set_type(hdr
, TIPC_DIRECT_MSG
);
1347 msg_set_lookup_scope(hdr
, 0);
1348 msg_set_destnode(hdr
, dnode
);
1349 msg_set_destport(hdr
, dest
->addr
.id
.ref
);
1350 msg_set_hdr_sz(hdr
, BASIC_H_SIZE
);
1353 /* Block or return if destination link is congested */
1354 rc
= tipc_wait_for_cond(sock
, &timeout
,
1355 !tipc_dest_find(clinks
, dnode
, 0));
1359 skb_queue_head_init(&pkts
);
1360 mtu
= tipc_node_get_mtu(net
, dnode
, tsk
->portid
);
1361 rc
= tipc_msg_build(hdr
, m
, 0, dlen
, mtu
, &pkts
);
1362 if (unlikely(rc
!= dlen
))
1365 rc
= tipc_node_xmit(net
, &pkts
, dnode
, tsk
->portid
);
1366 if (unlikely(rc
== -ELINKCONG
)) {
1367 tipc_dest_push(clinks
, dnode
, 0);
1368 tsk
->cong_link_cnt
++;
1372 if (unlikely(syn
&& !rc
))
1373 tipc_set_sk_state(sk
, TIPC_CONNECTING
);
1375 return rc
? rc
: dlen
;
1379 * tipc_sendstream - send stream-oriented data
1380 * @sock: socket structure
1382 * @dsz: total length of data to be transmitted
1384 * Used for SOCK_STREAM data.
1386 * Returns the number of bytes sent on success (or partial success),
1387 * or errno if no data sent
1389 static int tipc_sendstream(struct socket
*sock
, struct msghdr
*m
, size_t dsz
)
1391 struct sock
*sk
= sock
->sk
;
1395 ret
= __tipc_sendstream(sock
, m
, dsz
);
1401 static int __tipc_sendstream(struct socket
*sock
, struct msghdr
*m
, size_t dlen
)
1403 struct sock
*sk
= sock
->sk
;
1404 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
1405 long timeout
= sock_sndtimeo(sk
, m
->msg_flags
& MSG_DONTWAIT
);
1406 struct tipc_sock
*tsk
= tipc_sk(sk
);
1407 struct tipc_msg
*hdr
= &tsk
->phdr
;
1408 struct net
*net
= sock_net(sk
);
1409 struct sk_buff_head pkts
;
1410 u32 dnode
= tsk_peer_node(tsk
);
1414 skb_queue_head_init(&pkts
);
1416 if (unlikely(dlen
> INT_MAX
))
1419 /* Handle implicit connection setup */
1420 if (unlikely(dest
)) {
1421 rc
= __tipc_sendmsg(sock
, m
, dlen
);
1422 if (dlen
&& (dlen
== rc
))
1423 tsk
->snt_unacked
= tsk_inc(tsk
, dlen
+ msg_hdr_sz(hdr
));
1428 rc
= tipc_wait_for_cond(sock
, &timeout
,
1429 (!tsk
->cong_link_cnt
&&
1430 !tsk_conn_cong(tsk
) &&
1431 tipc_sk_connected(sk
)));
1435 send
= min_t(size_t, dlen
- sent
, TIPC_MAX_USER_MSG_SIZE
);
1436 rc
= tipc_msg_build(hdr
, m
, sent
, send
, tsk
->max_pkt
, &pkts
);
1437 if (unlikely(rc
!= send
))
1440 rc
= tipc_node_xmit(net
, &pkts
, dnode
, tsk
->portid
);
1441 if (unlikely(rc
== -ELINKCONG
)) {
1442 tsk
->cong_link_cnt
= 1;
1446 tsk
->snt_unacked
+= tsk_inc(tsk
, send
+ MIN_H_SIZE
);
1449 } while (sent
< dlen
&& !rc
);
1451 return sent
? sent
: rc
;
1455 * tipc_send_packet - send a connection-oriented message
1456 * @sock: socket structure
1457 * @m: message to send
1458 * @dsz: length of data to be transmitted
1460 * Used for SOCK_SEQPACKET messages.
1462 * Returns the number of bytes sent on success, or errno otherwise
1464 static int tipc_send_packet(struct socket
*sock
, struct msghdr
*m
, size_t dsz
)
1466 if (dsz
> TIPC_MAX_USER_MSG_SIZE
)
1469 return tipc_sendstream(sock
, m
, dsz
);
1472 /* tipc_sk_finish_conn - complete the setup of a connection
1474 static void tipc_sk_finish_conn(struct tipc_sock
*tsk
, u32 peer_port
,
1477 struct sock
*sk
= &tsk
->sk
;
1478 struct net
*net
= sock_net(sk
);
1479 struct tipc_msg
*msg
= &tsk
->phdr
;
1481 msg_set_destnode(msg
, peer_node
);
1482 msg_set_destport(msg
, peer_port
);
1483 msg_set_type(msg
, TIPC_CONN_MSG
);
1484 msg_set_lookup_scope(msg
, 0);
1485 msg_set_hdr_sz(msg
, SHORT_H_SIZE
);
1487 sk_reset_timer(sk
, &sk
->sk_timer
, jiffies
+ CONN_PROBING_INTV
);
1488 tipc_set_sk_state(sk
, TIPC_ESTABLISHED
);
1489 tipc_node_add_conn(net
, peer_node
, tsk
->portid
, peer_port
);
1490 tsk
->max_pkt
= tipc_node_get_mtu(net
, peer_node
, tsk
->portid
);
1491 tsk
->peer_caps
= tipc_node_get_capabilities(net
, peer_node
);
1492 if (tsk
->peer_caps
& TIPC_BLOCK_FLOWCTL
)
1495 /* Fall back to message based flow control */
1496 tsk
->rcv_win
= FLOWCTL_MSG_WIN
;
1497 tsk
->snd_win
= FLOWCTL_MSG_WIN
;
1501 * tipc_sk_set_orig_addr - capture sender's address for received message
1502 * @m: descriptor for message info
1503 * @hdr: received message header
1505 * Note: Address is not captured if not requested by receiver.
1507 static void tipc_sk_set_orig_addr(struct msghdr
*m
, struct sk_buff
*skb
)
1509 DECLARE_SOCKADDR(struct sockaddr_pair
*, srcaddr
, m
->msg_name
);
1510 struct tipc_msg
*hdr
= buf_msg(skb
);
1515 srcaddr
->sock
.family
= AF_TIPC
;
1516 srcaddr
->sock
.addrtype
= TIPC_ADDR_ID
;
1517 srcaddr
->sock
.addr
.id
.ref
= msg_origport(hdr
);
1518 srcaddr
->sock
.addr
.id
.node
= msg_orignode(hdr
);
1519 srcaddr
->sock
.addr
.name
.domain
= 0;
1520 srcaddr
->sock
.scope
= 0;
1521 m
->msg_namelen
= sizeof(struct sockaddr_tipc
);
1523 if (!msg_in_group(hdr
))
1526 /* Group message users may also want to know sending member's id */
1527 srcaddr
->member
.family
= AF_TIPC
;
1528 srcaddr
->member
.addrtype
= TIPC_ADDR_NAME
;
1529 srcaddr
->member
.addr
.name
.name
.type
= msg_nametype(hdr
);
1530 srcaddr
->member
.addr
.name
.name
.instance
= TIPC_SKB_CB(skb
)->orig_member
;
1531 srcaddr
->member
.addr
.name
.domain
= 0;
1532 m
->msg_namelen
= sizeof(*srcaddr
);
1536 * tipc_sk_anc_data_recv - optionally capture ancillary data for received message
1537 * @m: descriptor for message info
1538 * @msg: received message header
1539 * @tsk: TIPC port associated with message
1541 * Note: Ancillary data is not captured if not requested by receiver.
1543 * Returns 0 if successful, otherwise errno
1545 static int tipc_sk_anc_data_recv(struct msghdr
*m
, struct tipc_msg
*msg
,
1546 struct tipc_sock
*tsk
)
1554 if (likely(m
->msg_controllen
== 0))
1557 /* Optionally capture errored message object(s) */
1558 err
= msg
? msg_errcode(msg
) : 0;
1559 if (unlikely(err
)) {
1561 anc_data
[1] = msg_data_sz(msg
);
1562 res
= put_cmsg(m
, SOL_TIPC
, TIPC_ERRINFO
, 8, anc_data
);
1566 res
= put_cmsg(m
, SOL_TIPC
, TIPC_RETDATA
, anc_data
[1],
1573 /* Optionally capture message destination object */
1574 dest_type
= msg
? msg_type(msg
) : TIPC_DIRECT_MSG
;
1575 switch (dest_type
) {
1576 case TIPC_NAMED_MSG
:
1578 anc_data
[0] = msg_nametype(msg
);
1579 anc_data
[1] = msg_namelower(msg
);
1580 anc_data
[2] = msg_namelower(msg
);
1582 case TIPC_MCAST_MSG
:
1584 anc_data
[0] = msg_nametype(msg
);
1585 anc_data
[1] = msg_namelower(msg
);
1586 anc_data
[2] = msg_nameupper(msg
);
1589 has_name
= (tsk
->conn_type
!= 0);
1590 anc_data
[0] = tsk
->conn_type
;
1591 anc_data
[1] = tsk
->conn_instance
;
1592 anc_data
[2] = tsk
->conn_instance
;
1598 res
= put_cmsg(m
, SOL_TIPC
, TIPC_DESTNAME
, 12, anc_data
);
1606 static void tipc_sk_send_ack(struct tipc_sock
*tsk
)
1608 struct sock
*sk
= &tsk
->sk
;
1609 struct net
*net
= sock_net(sk
);
1610 struct sk_buff
*skb
= NULL
;
1611 struct tipc_msg
*msg
;
1612 u32 peer_port
= tsk_peer_port(tsk
);
1613 u32 dnode
= tsk_peer_node(tsk
);
1615 if (!tipc_sk_connected(sk
))
1617 skb
= tipc_msg_create(CONN_MANAGER
, CONN_ACK
, INT_H_SIZE
, 0,
1618 dnode
, tsk_own_node(tsk
), peer_port
,
1619 tsk
->portid
, TIPC_OK
);
1623 msg_set_conn_ack(msg
, tsk
->rcv_unacked
);
1624 tsk
->rcv_unacked
= 0;
1626 /* Adjust to and advertize the correct window limit */
1627 if (tsk
->peer_caps
& TIPC_BLOCK_FLOWCTL
) {
1628 tsk
->rcv_win
= tsk_adv_blocks(tsk
->sk
.sk_rcvbuf
);
1629 msg_set_adv_win(msg
, tsk
->rcv_win
);
1631 tipc_node_xmit_skb(net
, skb
, dnode
, msg_link_selector(msg
));
1634 static int tipc_wait_for_rcvmsg(struct socket
*sock
, long *timeop
)
1636 struct sock
*sk
= sock
->sk
;
1638 long timeo
= *timeop
;
1639 int err
= sock_error(sk
);
1645 prepare_to_wait(sk_sleep(sk
), &wait
, TASK_INTERRUPTIBLE
);
1646 if (timeo
&& skb_queue_empty(&sk
->sk_receive_queue
)) {
1647 if (sk
->sk_shutdown
& RCV_SHUTDOWN
) {
1652 timeo
= schedule_timeout(timeo
);
1656 if (!skb_queue_empty(&sk
->sk_receive_queue
))
1661 err
= sock_intr_errno(timeo
);
1662 if (signal_pending(current
))
1665 err
= sock_error(sk
);
1669 finish_wait(sk_sleep(sk
), &wait
);
1675 * tipc_recvmsg - receive packet-oriented message
1676 * @m: descriptor for message info
1677 * @buflen: length of user buffer area
1678 * @flags: receive flags
1680 * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages.
1681 * If the complete message doesn't fit in user area, truncate it.
1683 * Returns size of returned message data, errno otherwise
1685 static int tipc_recvmsg(struct socket
*sock
, struct msghdr
*m
,
1686 size_t buflen
, int flags
)
1688 struct sock
*sk
= sock
->sk
;
1689 bool connected
= !tipc_sk_type_connectionless(sk
);
1690 struct tipc_sock
*tsk
= tipc_sk(sk
);
1691 int rc
, err
, hlen
, dlen
, copy
;
1692 struct sk_buff_head xmitq
;
1693 struct tipc_msg
*hdr
;
1694 struct sk_buff
*skb
;
1698 /* Catch invalid receive requests */
1699 if (unlikely(!buflen
))
1703 if (unlikely(connected
&& sk
->sk_state
== TIPC_OPEN
)) {
1707 timeout
= sock_rcvtimeo(sk
, flags
& MSG_DONTWAIT
);
1709 /* Step rcv queue to first msg with data or error; wait if necessary */
1711 rc
= tipc_wait_for_rcvmsg(sock
, &timeout
);
1714 skb
= skb_peek(&sk
->sk_receive_queue
);
1716 dlen
= msg_data_sz(hdr
);
1717 hlen
= msg_hdr_sz(hdr
);
1718 err
= msg_errcode(hdr
);
1719 grp_evt
= msg_is_grp_evt(hdr
);
1720 if (likely(dlen
|| err
))
1722 tsk_advance_rx_queue(sk
);
1725 /* Collect msg meta data, including error code and rejected data */
1726 tipc_sk_set_orig_addr(m
, skb
);
1727 rc
= tipc_sk_anc_data_recv(m
, hdr
, tsk
);
1731 /* Capture data if non-error msg, otherwise just set return value */
1733 copy
= min_t(int, dlen
, buflen
);
1734 if (unlikely(copy
!= dlen
))
1735 m
->msg_flags
|= MSG_TRUNC
;
1736 rc
= skb_copy_datagram_msg(skb
, hlen
, m
, copy
);
1740 if (err
!= TIPC_CONN_SHUTDOWN
&& connected
&& !m
->msg_control
)
1746 /* Mark message as group event if applicable */
1747 if (unlikely(grp_evt
)) {
1748 if (msg_grp_evt(hdr
) == TIPC_WITHDRAWN
)
1749 m
->msg_flags
|= MSG_EOR
;
1750 m
->msg_flags
|= MSG_OOB
;
1754 /* Caption of data or error code/rejected data was successful */
1755 if (unlikely(flags
& MSG_PEEK
))
1758 /* Send group flow control advertisement when applicable */
1759 if (tsk
->group
&& msg_in_group(hdr
) && !grp_evt
) {
1760 skb_queue_head_init(&xmitq
);
1761 tipc_group_update_rcv_win(tsk
->group
, tsk_blocks(hlen
+ dlen
),
1762 msg_orignode(hdr
), msg_origport(hdr
),
1764 tipc_node_distr_xmit(sock_net(sk
), &xmitq
);
1767 tsk_advance_rx_queue(sk
);
1769 if (likely(!connected
))
1772 /* Send connection flow control advertisement when applicable */
1773 tsk
->rcv_unacked
+= tsk_inc(tsk
, hlen
+ dlen
);
1774 if (tsk
->rcv_unacked
>= tsk
->rcv_win
/ TIPC_ACK_RATE
)
1775 tipc_sk_send_ack(tsk
);
1778 return rc
? rc
: copy
;
1782 * tipc_recvstream - receive stream-oriented data
1783 * @m: descriptor for message info
1784 * @buflen: total size of user buffer area
1785 * @flags: receive flags
1787 * Used for SOCK_STREAM messages only. If not enough data is available
1788 * will optionally wait for more; never truncates data.
1790 * Returns size of returned message data, errno otherwise
1792 static int tipc_recvstream(struct socket
*sock
, struct msghdr
*m
,
1793 size_t buflen
, int flags
)
1795 struct sock
*sk
= sock
->sk
;
1796 struct tipc_sock
*tsk
= tipc_sk(sk
);
1797 struct sk_buff
*skb
;
1798 struct tipc_msg
*hdr
;
1799 struct tipc_skb_cb
*skb_cb
;
1800 bool peek
= flags
& MSG_PEEK
;
1801 int offset
, required
, copy
, copied
= 0;
1802 int hlen
, dlen
, err
, rc
;
1805 /* Catch invalid receive attempts */
1806 if (unlikely(!buflen
))
1811 if (unlikely(sk
->sk_state
== TIPC_OPEN
)) {
1815 required
= sock_rcvlowat(sk
, flags
& MSG_WAITALL
, buflen
);
1816 timeout
= sock_rcvtimeo(sk
, flags
& MSG_DONTWAIT
);
1819 /* Look at first msg in receive queue; wait if necessary */
1820 rc
= tipc_wait_for_rcvmsg(sock
, &timeout
);
1823 skb
= skb_peek(&sk
->sk_receive_queue
);
1824 skb_cb
= TIPC_SKB_CB(skb
);
1826 dlen
= msg_data_sz(hdr
);
1827 hlen
= msg_hdr_sz(hdr
);
1828 err
= msg_errcode(hdr
);
1830 /* Discard any empty non-errored (SYN-) message */
1831 if (unlikely(!dlen
&& !err
)) {
1832 tsk_advance_rx_queue(sk
);
1836 /* Collect msg meta data, incl. error code and rejected data */
1838 tipc_sk_set_orig_addr(m
, skb
);
1839 rc
= tipc_sk_anc_data_recv(m
, hdr
, tsk
);
1844 /* Copy data if msg ok, otherwise return error/partial data */
1846 offset
= skb_cb
->bytes_read
;
1847 copy
= min_t(int, dlen
- offset
, buflen
- copied
);
1848 rc
= skb_copy_datagram_msg(skb
, hlen
+ offset
, m
, copy
);
1853 if (unlikely(offset
< dlen
)) {
1855 skb_cb
->bytes_read
= offset
;
1860 if ((err
!= TIPC_CONN_SHUTDOWN
) && !m
->msg_control
)
1869 tsk_advance_rx_queue(sk
);
1871 /* Send connection flow control advertisement when applicable */
1872 tsk
->rcv_unacked
+= tsk_inc(tsk
, hlen
+ dlen
);
1873 if (unlikely(tsk
->rcv_unacked
>= tsk
->rcv_win
/ TIPC_ACK_RATE
))
1874 tipc_sk_send_ack(tsk
);
1876 /* Exit if all requested data or FIN/error received */
1877 if (copied
== buflen
|| err
)
1880 } while (!skb_queue_empty(&sk
->sk_receive_queue
) || copied
< required
);
1883 return copied
? copied
: rc
;
1887 * tipc_write_space - wake up thread if port congestion is released
1890 static void tipc_write_space(struct sock
*sk
)
1892 struct socket_wq
*wq
;
1895 wq
= rcu_dereference(sk
->sk_wq
);
1896 if (skwq_has_sleeper(wq
))
1897 wake_up_interruptible_sync_poll(&wq
->wait
, EPOLLOUT
|
1898 EPOLLWRNORM
| EPOLLWRBAND
);
1903 * tipc_data_ready - wake up threads to indicate messages have been received
1905 * @len: the length of messages
1907 static void tipc_data_ready(struct sock
*sk
)
1909 struct socket_wq
*wq
;
1912 wq
= rcu_dereference(sk
->sk_wq
);
1913 if (skwq_has_sleeper(wq
))
1914 wake_up_interruptible_sync_poll(&wq
->wait
, EPOLLIN
|
1915 EPOLLRDNORM
| EPOLLRDBAND
);
1919 static void tipc_sock_destruct(struct sock
*sk
)
1921 __skb_queue_purge(&sk
->sk_receive_queue
);
1924 static void tipc_sk_proto_rcv(struct sock
*sk
,
1925 struct sk_buff_head
*inputq
,
1926 struct sk_buff_head
*xmitq
)
1928 struct sk_buff
*skb
= __skb_dequeue(inputq
);
1929 struct tipc_sock
*tsk
= tipc_sk(sk
);
1930 struct tipc_msg
*hdr
= buf_msg(skb
);
1931 struct tipc_group
*grp
= tsk
->group
;
1932 bool wakeup
= false;
1934 switch (msg_user(hdr
)) {
1936 tipc_sk_conn_proto_rcv(tsk
, skb
, xmitq
);
1939 tipc_dest_del(&tsk
->cong_links
, msg_orignode(hdr
), 0);
1940 tsk
->cong_link_cnt
--;
1943 case GROUP_PROTOCOL
:
1944 tipc_group_proto_rcv(grp
, &wakeup
, hdr
, inputq
, xmitq
);
1947 tipc_group_member_evt(tsk
->group
, &wakeup
, &sk
->sk_rcvbuf
,
1948 hdr
, inputq
, xmitq
);
1955 sk
->sk_write_space(sk
);
1961 * tipc_filter_connect - Handle incoming message for a connection-based socket
1963 * @skb: pointer to message buffer. Set to NULL if buffer is consumed
1965 * Returns true if everything ok, false otherwise
1967 static bool tipc_sk_filter_connect(struct tipc_sock
*tsk
, struct sk_buff
*skb
)
1969 struct sock
*sk
= &tsk
->sk
;
1970 struct net
*net
= sock_net(sk
);
1971 struct tipc_msg
*hdr
= buf_msg(skb
);
1972 u32 pport
= msg_origport(hdr
);
1973 u32 pnode
= msg_orignode(hdr
);
1975 if (unlikely(msg_mcast(hdr
)))
1978 switch (sk
->sk_state
) {
1979 case TIPC_CONNECTING
:
1980 /* Accept only ACK or NACK message */
1981 if (unlikely(!msg_connected(hdr
))) {
1982 if (pport
!= tsk_peer_port(tsk
) ||
1983 pnode
!= tsk_peer_node(tsk
))
1986 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
1987 sk
->sk_err
= ECONNREFUSED
;
1988 sk
->sk_state_change(sk
);
1992 if (unlikely(msg_errcode(hdr
))) {
1993 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
1994 sk
->sk_err
= ECONNREFUSED
;
1995 sk
->sk_state_change(sk
);
1999 if (unlikely(!msg_isdata(hdr
))) {
2000 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
2001 sk
->sk_err
= EINVAL
;
2002 sk
->sk_state_change(sk
);
2006 tipc_sk_finish_conn(tsk
, msg_origport(hdr
), msg_orignode(hdr
));
2007 msg_set_importance(&tsk
->phdr
, msg_importance(hdr
));
2009 /* If 'ACK+' message, add to socket receive queue */
2010 if (msg_data_sz(hdr
))
2013 /* If empty 'ACK-' message, wake up sleeping connect() */
2014 sk
->sk_data_ready(sk
);
2016 /* 'ACK-' message is neither accepted nor rejected: */
2017 msg_set_dest_droppable(hdr
, 1);
2021 case TIPC_DISCONNECTING
:
2024 /* Accept only SYN message */
2025 if (!msg_connected(hdr
) && !(msg_errcode(hdr
)))
2028 case TIPC_ESTABLISHED
:
2029 /* Accept only connection-based messages sent by peer */
2030 if (unlikely(!tsk_peer_msg(tsk
, hdr
)))
2033 if (unlikely(msg_errcode(hdr
))) {
2034 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
2035 /* Let timer expire on it's own */
2036 tipc_node_remove_conn(net
, tsk_peer_node(tsk
),
2038 sk
->sk_state_change(sk
);
2042 pr_err("Unknown sk_state %u\n", sk
->sk_state
);
2049 * rcvbuf_limit - get proper overload limit of socket receive queue
2053 * For connection oriented messages, irrespective of importance,
2054 * default queue limit is 2 MB.
2056 * For connectionless messages, queue limits are based on message
2057 * importance as follows:
2059 * TIPC_LOW_IMPORTANCE (2 MB)
2060 * TIPC_MEDIUM_IMPORTANCE (4 MB)
2061 * TIPC_HIGH_IMPORTANCE (8 MB)
2062 * TIPC_CRITICAL_IMPORTANCE (16 MB)
2064 * Returns overload limit according to corresponding message importance
2066 static unsigned int rcvbuf_limit(struct sock
*sk
, struct sk_buff
*skb
)
2068 struct tipc_sock
*tsk
= tipc_sk(sk
);
2069 struct tipc_msg
*hdr
= buf_msg(skb
);
2071 if (unlikely(msg_in_group(hdr
)))
2072 return sk
->sk_rcvbuf
;
2074 if (unlikely(!msg_connected(hdr
)))
2075 return sk
->sk_rcvbuf
<< msg_importance(hdr
);
2077 if (likely(tsk
->peer_caps
& TIPC_BLOCK_FLOWCTL
))
2078 return sk
->sk_rcvbuf
;
2080 return FLOWCTL_MSG_LIM
;
2084 * tipc_sk_filter_rcv - validate incoming message
2086 * @skb: pointer to message.
2088 * Enqueues message on receive queue if acceptable; optionally handles
2089 * disconnect indication for a connected socket.
2091 * Called with socket lock already taken
2094 static void tipc_sk_filter_rcv(struct sock
*sk
, struct sk_buff
*skb
,
2095 struct sk_buff_head
*xmitq
)
2097 bool sk_conn
= !tipc_sk_type_connectionless(sk
);
2098 struct tipc_sock
*tsk
= tipc_sk(sk
);
2099 struct tipc_group
*grp
= tsk
->group
;
2100 struct tipc_msg
*hdr
= buf_msg(skb
);
2101 struct net
*net
= sock_net(sk
);
2102 struct sk_buff_head inputq
;
2103 int limit
, err
= TIPC_OK
;
2105 TIPC_SKB_CB(skb
)->bytes_read
= 0;
2106 __skb_queue_head_init(&inputq
);
2107 __skb_queue_tail(&inputq
, skb
);
2109 if (unlikely(!msg_isdata(hdr
)))
2110 tipc_sk_proto_rcv(sk
, &inputq
, xmitq
);
2113 tipc_group_filter_msg(grp
, &inputq
, xmitq
);
2115 /* Validate and add to receive buffer if there is space */
2116 while ((skb
= __skb_dequeue(&inputq
))) {
2118 limit
= rcvbuf_limit(sk
, skb
);
2119 if ((sk_conn
&& !tipc_sk_filter_connect(tsk
, skb
)) ||
2120 (!sk_conn
&& msg_connected(hdr
)) ||
2121 (!grp
&& msg_in_group(hdr
)))
2122 err
= TIPC_ERR_NO_PORT
;
2123 else if (sk_rmem_alloc_get(sk
) + skb
->truesize
>= limit
) {
2124 atomic_inc(&sk
->sk_drops
);
2125 err
= TIPC_ERR_OVERLOAD
;
2128 if (unlikely(err
)) {
2129 tipc_skb_reject(net
, err
, skb
, xmitq
);
2133 __skb_queue_tail(&sk
->sk_receive_queue
, skb
);
2134 skb_set_owner_r(skb
, sk
);
2135 sk
->sk_data_ready(sk
);
2140 * tipc_sk_backlog_rcv - handle incoming message from backlog queue
2144 * Caller must hold socket lock
2146 static int tipc_sk_backlog_rcv(struct sock
*sk
, struct sk_buff
*skb
)
2148 unsigned int before
= sk_rmem_alloc_get(sk
);
2149 struct sk_buff_head xmitq
;
2152 __skb_queue_head_init(&xmitq
);
2154 tipc_sk_filter_rcv(sk
, skb
, &xmitq
);
2155 added
= sk_rmem_alloc_get(sk
) - before
;
2156 atomic_add(added
, &tipc_sk(sk
)->dupl_rcvcnt
);
2158 /* Send pending response/rejected messages, if any */
2159 tipc_node_distr_xmit(sock_net(sk
), &xmitq
);
2164 * tipc_sk_enqueue - extract all buffers with destination 'dport' from
2165 * inputq and try adding them to socket or backlog queue
2166 * @inputq: list of incoming buffers with potentially different destinations
2167 * @sk: socket where the buffers should be enqueued
2168 * @dport: port number for the socket
2170 * Caller must hold socket lock
2172 static void tipc_sk_enqueue(struct sk_buff_head
*inputq
, struct sock
*sk
,
2173 u32 dport
, struct sk_buff_head
*xmitq
)
2175 unsigned long time_limit
= jiffies
+ 2;
2176 struct sk_buff
*skb
;
2181 while (skb_queue_len(inputq
)) {
2182 if (unlikely(time_after_eq(jiffies
, time_limit
)))
2185 skb
= tipc_skb_dequeue(inputq
, dport
);
2189 /* Add message directly to receive queue if possible */
2190 if (!sock_owned_by_user(sk
)) {
2191 tipc_sk_filter_rcv(sk
, skb
, xmitq
);
2195 /* Try backlog, compensating for double-counted bytes */
2196 dcnt
= &tipc_sk(sk
)->dupl_rcvcnt
;
2197 if (!sk
->sk_backlog
.len
)
2198 atomic_set(dcnt
, 0);
2199 lim
= rcvbuf_limit(sk
, skb
) + atomic_read(dcnt
);
2200 if (likely(!sk_add_backlog(sk
, skb
, lim
)))
2203 /* Overload => reject message back to sender */
2204 onode
= tipc_own_addr(sock_net(sk
));
2205 atomic_inc(&sk
->sk_drops
);
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 (scope
!= TIPC_NODE_SCOPE
)
2596 scope
= TIPC_CLUSTER_SCOPE
;
2598 if (tipc_sk_connected(sk
))
2600 key
= tsk
->portid
+ tsk
->pub_count
+ 1;
2601 if (key
== tsk
->portid
)
2604 publ
= tipc_nametbl_publish(net
, seq
->type
, seq
->lower
, seq
->upper
,
2605 scope
, tsk
->portid
, key
);
2606 if (unlikely(!publ
))
2609 list_add(&publ
->binding_sock
, &tsk
->publications
);
2615 static int tipc_sk_withdraw(struct tipc_sock
*tsk
, uint scope
,
2616 struct tipc_name_seq
const *seq
)
2618 struct net
*net
= sock_net(&tsk
->sk
);
2619 struct publication
*publ
;
2620 struct publication
*safe
;
2623 if (scope
!= TIPC_NODE_SCOPE
)
2624 scope
= TIPC_CLUSTER_SCOPE
;
2626 list_for_each_entry_safe(publ
, safe
, &tsk
->publications
, binding_sock
) {
2628 if (publ
->scope
!= scope
)
2630 if (publ
->type
!= seq
->type
)
2632 if (publ
->lower
!= seq
->lower
)
2634 if (publ
->upper
!= seq
->upper
)
2636 tipc_nametbl_withdraw(net
, publ
->type
, publ
->lower
,
2637 publ
->port
, publ
->key
);
2641 tipc_nametbl_withdraw(net
, publ
->type
, publ
->lower
,
2642 publ
->port
, publ
->key
);
2645 if (list_empty(&tsk
->publications
))
2650 /* tipc_sk_reinit: set non-zero address in all existing sockets
2651 * when we go from standalone to network mode.
2653 void tipc_sk_reinit(struct net
*net
)
2655 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2656 struct rhashtable_iter iter
;
2657 struct tipc_sock
*tsk
;
2658 struct tipc_msg
*msg
;
2660 rhashtable_walk_enter(&tn
->sk_rht
, &iter
);
2663 rhashtable_walk_start(&iter
);
2665 while ((tsk
= rhashtable_walk_next(&iter
)) && !IS_ERR(tsk
)) {
2666 spin_lock_bh(&tsk
->sk
.sk_lock
.slock
);
2668 msg_set_prevnode(msg
, tipc_own_addr(net
));
2669 msg_set_orignode(msg
, tipc_own_addr(net
));
2670 spin_unlock_bh(&tsk
->sk
.sk_lock
.slock
);
2673 rhashtable_walk_stop(&iter
);
2674 } while (tsk
== ERR_PTR(-EAGAIN
));
2677 static struct tipc_sock
*tipc_sk_lookup(struct net
*net
, u32 portid
)
2679 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2680 struct tipc_sock
*tsk
;
2683 tsk
= rhashtable_lookup_fast(&tn
->sk_rht
, &portid
, tsk_rht_params
);
2685 sock_hold(&tsk
->sk
);
2691 static int tipc_sk_insert(struct tipc_sock
*tsk
)
2693 struct sock
*sk
= &tsk
->sk
;
2694 struct net
*net
= sock_net(sk
);
2695 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2696 u32 remaining
= (TIPC_MAX_PORT
- TIPC_MIN_PORT
) + 1;
2697 u32 portid
= prandom_u32() % remaining
+ TIPC_MIN_PORT
;
2699 while (remaining
--) {
2701 if ((portid
< TIPC_MIN_PORT
) || (portid
> TIPC_MAX_PORT
))
2702 portid
= TIPC_MIN_PORT
;
2703 tsk
->portid
= portid
;
2704 sock_hold(&tsk
->sk
);
2705 if (!rhashtable_lookup_insert_fast(&tn
->sk_rht
, &tsk
->node
,
2714 static void tipc_sk_remove(struct tipc_sock
*tsk
)
2716 struct sock
*sk
= &tsk
->sk
;
2717 struct tipc_net
*tn
= net_generic(sock_net(sk
), tipc_net_id
);
2719 if (!rhashtable_remove_fast(&tn
->sk_rht
, &tsk
->node
, tsk_rht_params
)) {
2720 WARN_ON(refcount_read(&sk
->sk_refcnt
) == 1);
2725 static const struct rhashtable_params tsk_rht_params
= {
2727 .head_offset
= offsetof(struct tipc_sock
, node
),
2728 .key_offset
= offsetof(struct tipc_sock
, portid
),
2729 .key_len
= sizeof(u32
), /* portid */
2730 .max_size
= 1048576,
2732 .automatic_shrinking
= true,
2735 int tipc_sk_rht_init(struct net
*net
)
2737 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2739 return rhashtable_init(&tn
->sk_rht
, &tsk_rht_params
);
2742 void tipc_sk_rht_destroy(struct net
*net
)
2744 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2746 /* Wait for socket readers to complete */
2749 rhashtable_destroy(&tn
->sk_rht
);
2752 static int tipc_sk_join(struct tipc_sock
*tsk
, struct tipc_group_req
*mreq
)
2754 struct net
*net
= sock_net(&tsk
->sk
);
2755 struct tipc_group
*grp
= tsk
->group
;
2756 struct tipc_msg
*hdr
= &tsk
->phdr
;
2757 struct tipc_name_seq seq
;
2760 if (mreq
->type
< TIPC_RESERVED_TYPES
)
2762 if (mreq
->scope
> TIPC_NODE_SCOPE
)
2766 grp
= tipc_group_create(net
, tsk
->portid
, mreq
, &tsk
->group_is_open
);
2770 msg_set_lookup_scope(hdr
, mreq
->scope
);
2771 msg_set_nametype(hdr
, mreq
->type
);
2772 msg_set_dest_droppable(hdr
, true);
2773 seq
.type
= mreq
->type
;
2774 seq
.lower
= mreq
->instance
;
2775 seq
.upper
= seq
.lower
;
2776 tipc_nametbl_build_group(net
, grp
, mreq
->type
, mreq
->scope
);
2777 rc
= tipc_sk_publish(tsk
, mreq
->scope
, &seq
);
2779 tipc_group_delete(net
, grp
);
2783 /* Eliminate any risk that a broadcast overtakes sent JOINs */
2784 tsk
->mc_method
.rcast
= true;
2785 tsk
->mc_method
.mandatory
= true;
2786 tipc_group_join(net
, grp
, &tsk
->sk
.sk_rcvbuf
);
2790 static int tipc_sk_leave(struct tipc_sock
*tsk
)
2792 struct net
*net
= sock_net(&tsk
->sk
);
2793 struct tipc_group
*grp
= tsk
->group
;
2794 struct tipc_name_seq seq
;
2799 tipc_group_self(grp
, &seq
, &scope
);
2800 tipc_group_delete(net
, grp
);
2802 tipc_sk_withdraw(tsk
, scope
, &seq
);
2807 * tipc_setsockopt - set socket option
2808 * @sock: socket structure
2809 * @lvl: option level
2810 * @opt: option identifier
2811 * @ov: pointer to new option value
2812 * @ol: length of option value
2814 * For stream sockets only, accepts and ignores all IPPROTO_TCP options
2815 * (to ease compatibility).
2817 * Returns 0 on success, errno otherwise
2819 static int tipc_setsockopt(struct socket
*sock
, int lvl
, int opt
,
2820 char __user
*ov
, unsigned int ol
)
2822 struct sock
*sk
= sock
->sk
;
2823 struct tipc_sock
*tsk
= tipc_sk(sk
);
2824 struct tipc_group_req mreq
;
2828 if ((lvl
== IPPROTO_TCP
) && (sock
->type
== SOCK_STREAM
))
2830 if (lvl
!= SOL_TIPC
)
2831 return -ENOPROTOOPT
;
2834 case TIPC_IMPORTANCE
:
2835 case TIPC_SRC_DROPPABLE
:
2836 case TIPC_DEST_DROPPABLE
:
2837 case TIPC_CONN_TIMEOUT
:
2838 if (ol
< sizeof(value
))
2840 if (get_user(value
, (u32 __user
*)ov
))
2843 case TIPC_GROUP_JOIN
:
2844 if (ol
< sizeof(mreq
))
2846 if (copy_from_user(&mreq
, ov
, sizeof(mreq
)))
2857 case TIPC_IMPORTANCE
:
2858 res
= tsk_set_importance(tsk
, value
);
2860 case TIPC_SRC_DROPPABLE
:
2861 if (sock
->type
!= SOCK_STREAM
)
2862 tsk_set_unreliable(tsk
, value
);
2866 case TIPC_DEST_DROPPABLE
:
2867 tsk_set_unreturnable(tsk
, value
);
2869 case TIPC_CONN_TIMEOUT
:
2870 tipc_sk(sk
)->conn_timeout
= value
;
2872 case TIPC_MCAST_BROADCAST
:
2873 tsk
->mc_method
.rcast
= false;
2874 tsk
->mc_method
.mandatory
= true;
2876 case TIPC_MCAST_REPLICAST
:
2877 tsk
->mc_method
.rcast
= true;
2878 tsk
->mc_method
.mandatory
= true;
2880 case TIPC_GROUP_JOIN
:
2881 res
= tipc_sk_join(tsk
, &mreq
);
2883 case TIPC_GROUP_LEAVE
:
2884 res
= tipc_sk_leave(tsk
);
2896 * tipc_getsockopt - get socket option
2897 * @sock: socket structure
2898 * @lvl: option level
2899 * @opt: option identifier
2900 * @ov: receptacle for option value
2901 * @ol: receptacle for length of option value
2903 * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
2904 * (to ease compatibility).
2906 * Returns 0 on success, errno otherwise
2908 static int tipc_getsockopt(struct socket
*sock
, int lvl
, int opt
,
2909 char __user
*ov
, int __user
*ol
)
2911 struct sock
*sk
= sock
->sk
;
2912 struct tipc_sock
*tsk
= tipc_sk(sk
);
2913 struct tipc_name_seq seq
;
2918 if ((lvl
== IPPROTO_TCP
) && (sock
->type
== SOCK_STREAM
))
2919 return put_user(0, ol
);
2920 if (lvl
!= SOL_TIPC
)
2921 return -ENOPROTOOPT
;
2922 res
= get_user(len
, ol
);
2929 case TIPC_IMPORTANCE
:
2930 value
= tsk_importance(tsk
);
2932 case TIPC_SRC_DROPPABLE
:
2933 value
= tsk_unreliable(tsk
);
2935 case TIPC_DEST_DROPPABLE
:
2936 value
= tsk_unreturnable(tsk
);
2938 case TIPC_CONN_TIMEOUT
:
2939 value
= tsk
->conn_timeout
;
2940 /* no need to set "res", since already 0 at this point */
2942 case TIPC_NODE_RECVQ_DEPTH
:
2943 value
= 0; /* was tipc_queue_size, now obsolete */
2945 case TIPC_SOCK_RECVQ_DEPTH
:
2946 value
= skb_queue_len(&sk
->sk_receive_queue
);
2948 case TIPC_GROUP_JOIN
:
2951 tipc_group_self(tsk
->group
, &seq
, &scope
);
2961 return res
; /* "get" failed */
2963 if (len
< sizeof(value
))
2966 if (copy_to_user(ov
, &value
, sizeof(value
)))
2969 return put_user(sizeof(value
), ol
);
2972 static int tipc_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
2974 struct sock
*sk
= sock
->sk
;
2975 struct tipc_sioc_ln_req lnr
;
2976 void __user
*argp
= (void __user
*)arg
;
2979 case SIOCGETLINKNAME
:
2980 if (copy_from_user(&lnr
, argp
, sizeof(lnr
)))
2982 if (!tipc_node_get_linkname(sock_net(sk
),
2983 lnr
.bearer_id
& 0xffff, lnr
.peer
,
2984 lnr
.linkname
, TIPC_MAX_LINK_NAME
)) {
2985 if (copy_to_user(argp
, &lnr
, sizeof(lnr
)))
2989 return -EADDRNOTAVAIL
;
2991 return -ENOIOCTLCMD
;
2995 static int tipc_socketpair(struct socket
*sock1
, struct socket
*sock2
)
2997 struct tipc_sock
*tsk2
= tipc_sk(sock2
->sk
);
2998 struct tipc_sock
*tsk1
= tipc_sk(sock1
->sk
);
2999 u32 onode
= tipc_own_addr(sock_net(sock1
->sk
));
3001 tsk1
->peer
.family
= AF_TIPC
;
3002 tsk1
->peer
.addrtype
= TIPC_ADDR_ID
;
3003 tsk1
->peer
.scope
= TIPC_NODE_SCOPE
;
3004 tsk1
->peer
.addr
.id
.ref
= tsk2
->portid
;
3005 tsk1
->peer
.addr
.id
.node
= onode
;
3006 tsk2
->peer
.family
= AF_TIPC
;
3007 tsk2
->peer
.addrtype
= TIPC_ADDR_ID
;
3008 tsk2
->peer
.scope
= TIPC_NODE_SCOPE
;
3009 tsk2
->peer
.addr
.id
.ref
= tsk1
->portid
;
3010 tsk2
->peer
.addr
.id
.node
= onode
;
3012 tipc_sk_finish_conn(tsk1
, tsk2
->portid
, onode
);
3013 tipc_sk_finish_conn(tsk2
, tsk1
->portid
, onode
);
3017 /* Protocol switches for the various types of TIPC sockets */
3019 static const struct proto_ops msg_ops
= {
3020 .owner
= THIS_MODULE
,
3022 .release
= tipc_release
,
3024 .connect
= tipc_connect
,
3025 .socketpair
= tipc_socketpair
,
3026 .accept
= sock_no_accept
,
3027 .getname
= tipc_getname
,
3029 .ioctl
= tipc_ioctl
,
3030 .listen
= sock_no_listen
,
3031 .shutdown
= tipc_shutdown
,
3032 .setsockopt
= tipc_setsockopt
,
3033 .getsockopt
= tipc_getsockopt
,
3034 .sendmsg
= tipc_sendmsg
,
3035 .recvmsg
= tipc_recvmsg
,
3036 .mmap
= sock_no_mmap
,
3037 .sendpage
= sock_no_sendpage
3040 static const struct proto_ops packet_ops
= {
3041 .owner
= THIS_MODULE
,
3043 .release
= tipc_release
,
3045 .connect
= tipc_connect
,
3046 .socketpair
= tipc_socketpair
,
3047 .accept
= tipc_accept
,
3048 .getname
= tipc_getname
,
3050 .ioctl
= tipc_ioctl
,
3051 .listen
= tipc_listen
,
3052 .shutdown
= tipc_shutdown
,
3053 .setsockopt
= tipc_setsockopt
,
3054 .getsockopt
= tipc_getsockopt
,
3055 .sendmsg
= tipc_send_packet
,
3056 .recvmsg
= tipc_recvmsg
,
3057 .mmap
= sock_no_mmap
,
3058 .sendpage
= sock_no_sendpage
3061 static const struct proto_ops stream_ops
= {
3062 .owner
= THIS_MODULE
,
3064 .release
= tipc_release
,
3066 .connect
= tipc_connect
,
3067 .socketpair
= tipc_socketpair
,
3068 .accept
= tipc_accept
,
3069 .getname
= tipc_getname
,
3071 .ioctl
= tipc_ioctl
,
3072 .listen
= tipc_listen
,
3073 .shutdown
= tipc_shutdown
,
3074 .setsockopt
= tipc_setsockopt
,
3075 .getsockopt
= tipc_getsockopt
,
3076 .sendmsg
= tipc_sendstream
,
3077 .recvmsg
= tipc_recvstream
,
3078 .mmap
= sock_no_mmap
,
3079 .sendpage
= sock_no_sendpage
3082 static const struct net_proto_family tipc_family_ops
= {
3083 .owner
= THIS_MODULE
,
3085 .create
= tipc_sk_create
3088 static struct proto tipc_proto
= {
3090 .owner
= THIS_MODULE
,
3091 .obj_size
= sizeof(struct tipc_sock
),
3092 .sysctl_rmem
= sysctl_tipc_rmem
3096 * tipc_socket_init - initialize TIPC socket interface
3098 * Returns 0 on success, errno otherwise
3100 int tipc_socket_init(void)
3104 res
= proto_register(&tipc_proto
, 1);
3106 pr_err("Failed to register TIPC protocol type\n");
3110 res
= sock_register(&tipc_family_ops
);
3112 pr_err("Failed to register TIPC socket type\n");
3113 proto_unregister(&tipc_proto
);
3121 * tipc_socket_stop - stop TIPC socket interface
3123 void tipc_socket_stop(void)
3125 sock_unregister(tipc_family_ops
.family
);
3126 proto_unregister(&tipc_proto
);
3129 /* Caller should hold socket lock for the passed tipc socket. */
3130 static int __tipc_nl_add_sk_con(struct sk_buff
*skb
, struct tipc_sock
*tsk
)
3134 struct nlattr
*nest
;
3136 peer_node
= tsk_peer_node(tsk
);
3137 peer_port
= tsk_peer_port(tsk
);
3139 nest
= nla_nest_start(skb
, TIPC_NLA_SOCK_CON
);
3141 if (nla_put_u32(skb
, TIPC_NLA_CON_NODE
, peer_node
))
3143 if (nla_put_u32(skb
, TIPC_NLA_CON_SOCK
, peer_port
))
3146 if (tsk
->conn_type
!= 0) {
3147 if (nla_put_flag(skb
, TIPC_NLA_CON_FLAG
))
3149 if (nla_put_u32(skb
, TIPC_NLA_CON_TYPE
, tsk
->conn_type
))
3151 if (nla_put_u32(skb
, TIPC_NLA_CON_INST
, tsk
->conn_instance
))
3154 nla_nest_end(skb
, nest
);
3159 nla_nest_cancel(skb
, nest
);
3164 static int __tipc_nl_add_sk_info(struct sk_buff
*skb
, struct tipc_sock
3167 struct net
*net
= sock_net(skb
->sk
);
3168 struct sock
*sk
= &tsk
->sk
;
3170 if (nla_put_u32(skb
, TIPC_NLA_SOCK_REF
, tsk
->portid
) ||
3171 nla_put_u32(skb
, TIPC_NLA_SOCK_ADDR
, tipc_own_addr(net
)))
3174 if (tipc_sk_connected(sk
)) {
3175 if (__tipc_nl_add_sk_con(skb
, tsk
))
3177 } else if (!list_empty(&tsk
->publications
)) {
3178 if (nla_put_flag(skb
, TIPC_NLA_SOCK_HAS_PUBL
))
3184 /* Caller should hold socket lock for the passed tipc socket. */
3185 static int __tipc_nl_add_sk(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3186 struct tipc_sock
*tsk
)
3188 struct nlattr
*attrs
;
3191 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
3192 &tipc_genl_family
, NLM_F_MULTI
, TIPC_NL_SOCK_GET
);
3196 attrs
= nla_nest_start(skb
, TIPC_NLA_SOCK
);
3198 goto genlmsg_cancel
;
3200 if (__tipc_nl_add_sk_info(skb
, tsk
))
3201 goto attr_msg_cancel
;
3203 nla_nest_end(skb
, attrs
);
3204 genlmsg_end(skb
, hdr
);
3209 nla_nest_cancel(skb
, attrs
);
3211 genlmsg_cancel(skb
, hdr
);
3216 int tipc_nl_sk_walk(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3217 int (*skb_handler
)(struct sk_buff
*skb
,
3218 struct netlink_callback
*cb
,
3219 struct tipc_sock
*tsk
))
3221 struct net
*net
= sock_net(skb
->sk
);
3222 struct tipc_net
*tn
= tipc_net(net
);
3223 const struct bucket_table
*tbl
;
3224 u32 prev_portid
= cb
->args
[1];
3225 u32 tbl_id
= cb
->args
[0];
3226 struct rhash_head
*pos
;
3227 struct tipc_sock
*tsk
;
3231 tbl
= rht_dereference_rcu((&tn
->sk_rht
)->tbl
, &tn
->sk_rht
);
3232 for (; tbl_id
< tbl
->size
; tbl_id
++) {
3233 rht_for_each_entry_rcu(tsk
, pos
, tbl
, tbl_id
, node
) {
3234 spin_lock_bh(&tsk
->sk
.sk_lock
.slock
);
3235 if (prev_portid
&& prev_portid
!= tsk
->portid
) {
3236 spin_unlock_bh(&tsk
->sk
.sk_lock
.slock
);
3240 err
= skb_handler(skb
, cb
, tsk
);
3242 prev_portid
= tsk
->portid
;
3243 spin_unlock_bh(&tsk
->sk
.sk_lock
.slock
);
3248 spin_unlock_bh(&tsk
->sk
.sk_lock
.slock
);
3253 cb
->args
[0] = tbl_id
;
3254 cb
->args
[1] = prev_portid
;
3258 EXPORT_SYMBOL(tipc_nl_sk_walk
);
3260 int tipc_sk_fill_sock_diag(struct sk_buff
*skb
, struct tipc_sock
*tsk
,
3261 u32 sk_filter_state
,
3262 u64 (*tipc_diag_gen_cookie
)(struct sock
*sk
))
3264 struct sock
*sk
= &tsk
->sk
;
3265 struct nlattr
*attrs
;
3266 struct nlattr
*stat
;
3268 /*filter response w.r.t sk_state*/
3269 if (!(sk_filter_state
& (1 << sk
->sk_state
)))
3272 attrs
= nla_nest_start(skb
, TIPC_NLA_SOCK
);
3276 if (__tipc_nl_add_sk_info(skb
, tsk
))
3277 goto attr_msg_cancel
;
3279 if (nla_put_u32(skb
, TIPC_NLA_SOCK_TYPE
, (u32
)sk
->sk_type
) ||
3280 nla_put_u32(skb
, TIPC_NLA_SOCK_TIPC_STATE
, (u32
)sk
->sk_state
) ||
3281 nla_put_u32(skb
, TIPC_NLA_SOCK_INO
, sock_i_ino(sk
)) ||
3282 nla_put_u32(skb
, TIPC_NLA_SOCK_UID
,
3283 from_kuid_munged(sk_user_ns(sk
), sock_i_uid(sk
))) ||
3284 nla_put_u64_64bit(skb
, TIPC_NLA_SOCK_COOKIE
,
3285 tipc_diag_gen_cookie(sk
),
3287 goto attr_msg_cancel
;
3289 stat
= nla_nest_start(skb
, TIPC_NLA_SOCK_STAT
);
3291 goto attr_msg_cancel
;
3293 if (nla_put_u32(skb
, TIPC_NLA_SOCK_STAT_RCVQ
,
3294 skb_queue_len(&sk
->sk_receive_queue
)) ||
3295 nla_put_u32(skb
, TIPC_NLA_SOCK_STAT_SENDQ
,
3296 skb_queue_len(&sk
->sk_write_queue
)) ||
3297 nla_put_u32(skb
, TIPC_NLA_SOCK_STAT_DROP
,
3298 atomic_read(&sk
->sk_drops
)))
3299 goto stat_msg_cancel
;
3301 if (tsk
->cong_link_cnt
&&
3302 nla_put_flag(skb
, TIPC_NLA_SOCK_STAT_LINK_CONG
))
3303 goto stat_msg_cancel
;
3305 if (tsk_conn_cong(tsk
) &&
3306 nla_put_flag(skb
, TIPC_NLA_SOCK_STAT_CONN_CONG
))
3307 goto stat_msg_cancel
;
3309 nla_nest_end(skb
, stat
);
3310 nla_nest_end(skb
, attrs
);
3315 nla_nest_cancel(skb
, stat
);
3317 nla_nest_cancel(skb
, attrs
);
3321 EXPORT_SYMBOL(tipc_sk_fill_sock_diag
);
3323 int tipc_nl_sk_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3325 return tipc_nl_sk_walk(skb
, cb
, __tipc_nl_add_sk
);
3328 /* Caller should hold socket lock for the passed tipc socket. */
3329 static int __tipc_nl_add_sk_publ(struct sk_buff
*skb
,
3330 struct netlink_callback
*cb
,
3331 struct publication
*publ
)
3334 struct nlattr
*attrs
;
3336 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
3337 &tipc_genl_family
, NLM_F_MULTI
, TIPC_NL_PUBL_GET
);
3341 attrs
= nla_nest_start(skb
, TIPC_NLA_PUBL
);
3343 goto genlmsg_cancel
;
3345 if (nla_put_u32(skb
, TIPC_NLA_PUBL_KEY
, publ
->key
))
3346 goto attr_msg_cancel
;
3347 if (nla_put_u32(skb
, TIPC_NLA_PUBL_TYPE
, publ
->type
))
3348 goto attr_msg_cancel
;
3349 if (nla_put_u32(skb
, TIPC_NLA_PUBL_LOWER
, publ
->lower
))
3350 goto attr_msg_cancel
;
3351 if (nla_put_u32(skb
, TIPC_NLA_PUBL_UPPER
, publ
->upper
))
3352 goto attr_msg_cancel
;
3354 nla_nest_end(skb
, attrs
);
3355 genlmsg_end(skb
, hdr
);
3360 nla_nest_cancel(skb
, attrs
);
3362 genlmsg_cancel(skb
, hdr
);
3367 /* Caller should hold socket lock for the passed tipc socket. */
3368 static int __tipc_nl_list_sk_publ(struct sk_buff
*skb
,
3369 struct netlink_callback
*cb
,
3370 struct tipc_sock
*tsk
, u32
*last_publ
)
3373 struct publication
*p
;
3376 list_for_each_entry(p
, &tsk
->publications
, binding_sock
) {
3377 if (p
->key
== *last_publ
)
3380 if (p
->key
!= *last_publ
) {
3381 /* We never set seq or call nl_dump_check_consistent()
3382 * this means that setting prev_seq here will cause the
3383 * consistence check to fail in the netlink callback
3384 * handler. Resulting in the last NLMSG_DONE message
3385 * having the NLM_F_DUMP_INTR flag set.
3392 p
= list_first_entry(&tsk
->publications
, struct publication
,
3396 list_for_each_entry_from(p
, &tsk
->publications
, binding_sock
) {
3397 err
= __tipc_nl_add_sk_publ(skb
, cb
, p
);
3399 *last_publ
= p
->key
;
3408 int tipc_nl_publ_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3411 u32 tsk_portid
= cb
->args
[0];
3412 u32 last_publ
= cb
->args
[1];
3413 u32 done
= cb
->args
[2];
3414 struct net
*net
= sock_net(skb
->sk
);
3415 struct tipc_sock
*tsk
;
3418 struct nlattr
**attrs
;
3419 struct nlattr
*sock
[TIPC_NLA_SOCK_MAX
+ 1];
3421 err
= tipc_nlmsg_parse(cb
->nlh
, &attrs
);
3425 if (!attrs
[TIPC_NLA_SOCK
])
3428 err
= nla_parse_nested(sock
, TIPC_NLA_SOCK_MAX
,
3429 attrs
[TIPC_NLA_SOCK
],
3430 tipc_nl_sock_policy
, NULL
);
3434 if (!sock
[TIPC_NLA_SOCK_REF
])
3437 tsk_portid
= nla_get_u32(sock
[TIPC_NLA_SOCK_REF
]);
3443 tsk
= tipc_sk_lookup(net
, tsk_portid
);
3447 lock_sock(&tsk
->sk
);
3448 err
= __tipc_nl_list_sk_publ(skb
, cb
, tsk
, &last_publ
);
3451 release_sock(&tsk
->sk
);
3454 cb
->args
[0] = tsk_portid
;
3455 cb
->args
[1] = last_publ
;