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"
51 #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
52 #define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */
53 #define TIPC_FWD_MSG 1
54 #define TIPC_MAX_PORT 0xffffffff
55 #define TIPC_MIN_PORT 1
56 #define TIPC_ACK_RATE 4 /* ACK at 1/4 of of rcv window size */
59 TIPC_LISTEN
= TCP_LISTEN
,
60 TIPC_ESTABLISHED
= TCP_ESTABLISHED
,
61 TIPC_OPEN
= TCP_CLOSE
,
62 TIPC_DISCONNECTING
= TCP_CLOSE_WAIT
,
63 TIPC_CONNECTING
= TCP_SYN_SENT
,
66 struct sockaddr_pair
{
67 struct sockaddr_tipc sock
;
68 struct sockaddr_tipc member
;
72 * struct tipc_sock - TIPC socket structure
73 * @sk: socket - interacts with 'port' and with user via the socket API
74 * @conn_type: TIPC type used when connection was established
75 * @conn_instance: TIPC instance used when connection was established
76 * @published: non-zero if port has one or more associated names
77 * @max_pkt: maximum packet size "hint" used when building messages sent by port
78 * @portid: unique port identity in TIPC socket hash table
79 * @phdr: preformatted message header used when sending messages
80 * #cong_links: list of congested links
81 * @publications: list of publications for port
82 * @blocking_link: address of the congested link we are currently sleeping on
83 * @pub_count: total # of publications port has made during its lifetime
84 * @conn_timeout: the time we can wait for an unresponded setup request
85 * @dupl_rcvcnt: number of bytes counted twice, in both backlog and rcv queue
86 * @cong_link_cnt: number of congested links
87 * @snt_unacked: # messages sent by socket, and not yet acked by peer
88 * @rcv_unacked: # messages read by user, but not yet acked back to peer
89 * @peer: 'connected' peer for dgram/rdm
90 * @node: hash table node
91 * @mc_method: cookie for use between socket and broadcast layer
92 * @rcu: rcu struct for tipc_sock
101 struct tipc_msg phdr
;
102 struct list_head cong_links
;
103 struct list_head publications
;
105 atomic_t dupl_rcvcnt
;
114 struct sockaddr_tipc peer
;
115 struct rhash_head node
;
116 struct tipc_mc_method mc_method
;
118 struct tipc_group
*group
;
122 static int tipc_sk_backlog_rcv(struct sock
*sk
, struct sk_buff
*skb
);
123 static void tipc_data_ready(struct sock
*sk
);
124 static void tipc_write_space(struct sock
*sk
);
125 static void tipc_sock_destruct(struct sock
*sk
);
126 static int tipc_release(struct socket
*sock
);
127 static int tipc_accept(struct socket
*sock
, struct socket
*new_sock
, int flags
,
129 static void tipc_sk_timeout(struct timer_list
*t
);
130 static int tipc_sk_publish(struct tipc_sock
*tsk
, uint scope
,
131 struct tipc_name_seq
const *seq
);
132 static int tipc_sk_withdraw(struct tipc_sock
*tsk
, uint scope
,
133 struct tipc_name_seq
const *seq
);
134 static int tipc_sk_leave(struct tipc_sock
*tsk
);
135 static struct tipc_sock
*tipc_sk_lookup(struct net
*net
, u32 portid
);
136 static int tipc_sk_insert(struct tipc_sock
*tsk
);
137 static void tipc_sk_remove(struct tipc_sock
*tsk
);
138 static int __tipc_sendstream(struct socket
*sock
, struct msghdr
*m
, size_t dsz
);
139 static int __tipc_sendmsg(struct socket
*sock
, struct msghdr
*m
, size_t dsz
);
141 static const struct proto_ops packet_ops
;
142 static const struct proto_ops stream_ops
;
143 static const struct proto_ops msg_ops
;
144 static struct proto tipc_proto
;
145 static const struct rhashtable_params tsk_rht_params
;
147 static u32
tsk_own_node(struct tipc_sock
*tsk
)
149 return msg_prevnode(&tsk
->phdr
);
152 static u32
tsk_peer_node(struct tipc_sock
*tsk
)
154 return msg_destnode(&tsk
->phdr
);
157 static u32
tsk_peer_port(struct tipc_sock
*tsk
)
159 return msg_destport(&tsk
->phdr
);
162 static bool tsk_unreliable(struct tipc_sock
*tsk
)
164 return msg_src_droppable(&tsk
->phdr
) != 0;
167 static void tsk_set_unreliable(struct tipc_sock
*tsk
, bool unreliable
)
169 msg_set_src_droppable(&tsk
->phdr
, unreliable
? 1 : 0);
172 static bool tsk_unreturnable(struct tipc_sock
*tsk
)
174 return msg_dest_droppable(&tsk
->phdr
) != 0;
177 static void tsk_set_unreturnable(struct tipc_sock
*tsk
, bool unreturnable
)
179 msg_set_dest_droppable(&tsk
->phdr
, unreturnable
? 1 : 0);
182 static int tsk_importance(struct tipc_sock
*tsk
)
184 return msg_importance(&tsk
->phdr
);
187 static int tsk_set_importance(struct tipc_sock
*tsk
, int imp
)
189 if (imp
> TIPC_CRITICAL_IMPORTANCE
)
191 msg_set_importance(&tsk
->phdr
, (u32
)imp
);
195 static struct tipc_sock
*tipc_sk(const struct sock
*sk
)
197 return container_of(sk
, struct tipc_sock
, sk
);
200 static bool tsk_conn_cong(struct tipc_sock
*tsk
)
202 return tsk
->snt_unacked
> tsk
->snd_win
;
205 static u16
tsk_blocks(int len
)
207 return ((len
/ FLOWCTL_BLK_SZ
) + 1);
210 /* tsk_blocks(): translate a buffer size in bytes to number of
211 * advertisable blocks, taking into account the ratio truesize(len)/len
212 * We can trust that this ratio is always < 4 for len >= FLOWCTL_BLK_SZ
214 static u16
tsk_adv_blocks(int len
)
216 return len
/ FLOWCTL_BLK_SZ
/ 4;
219 /* tsk_inc(): increment counter for sent or received data
220 * - If block based flow control is not supported by peer we
221 * fall back to message based ditto, incrementing the counter
223 static u16
tsk_inc(struct tipc_sock
*tsk
, int msglen
)
225 if (likely(tsk
->peer_caps
& TIPC_BLOCK_FLOWCTL
))
226 return ((msglen
/ FLOWCTL_BLK_SZ
) + 1);
231 * tsk_advance_rx_queue - discard first buffer in socket receive queue
233 * Caller must hold socket lock
235 static void tsk_advance_rx_queue(struct sock
*sk
)
237 trace_tipc_sk_advance_rx(sk
, NULL
, TIPC_DUMP_SK_RCVQ
, " ");
238 kfree_skb(__skb_dequeue(&sk
->sk_receive_queue
));
241 /* tipc_sk_respond() : send response message back to sender
243 static void tipc_sk_respond(struct sock
*sk
, struct sk_buff
*skb
, int err
)
247 u32 onode
= tipc_own_addr(sock_net(sk
));
249 if (!tipc_msg_reverse(onode
, &skb
, err
))
252 trace_tipc_sk_rej_msg(sk
, skb
, TIPC_DUMP_NONE
, "@sk_respond!");
253 dnode
= msg_destnode(buf_msg(skb
));
254 selector
= msg_origport(buf_msg(skb
));
255 tipc_node_xmit_skb(sock_net(sk
), skb
, dnode
, selector
);
259 * tsk_rej_rx_queue - reject all buffers in socket receive queue
261 * Caller must hold socket lock
263 static void tsk_rej_rx_queue(struct sock
*sk
)
267 while ((skb
= __skb_dequeue(&sk
->sk_receive_queue
)))
268 tipc_sk_respond(sk
, skb
, TIPC_ERR_NO_PORT
);
271 static bool tipc_sk_connected(struct sock
*sk
)
273 return sk
->sk_state
== TIPC_ESTABLISHED
;
276 /* tipc_sk_type_connectionless - check if the socket is datagram socket
279 * Returns true if connection less, false otherwise
281 static bool tipc_sk_type_connectionless(struct sock
*sk
)
283 return sk
->sk_type
== SOCK_RDM
|| sk
->sk_type
== SOCK_DGRAM
;
286 /* tsk_peer_msg - verify if message was sent by connected port's peer
288 * Handles cases where the node's network address has changed from
289 * the default of <0.0.0> to its configured setting.
291 static bool tsk_peer_msg(struct tipc_sock
*tsk
, struct tipc_msg
*msg
)
293 struct sock
*sk
= &tsk
->sk
;
294 u32 self
= tipc_own_addr(sock_net(sk
));
295 u32 peer_port
= tsk_peer_port(tsk
);
296 u32 orig_node
, peer_node
;
298 if (unlikely(!tipc_sk_connected(sk
)))
301 if (unlikely(msg_origport(msg
) != peer_port
))
304 orig_node
= msg_orignode(msg
);
305 peer_node
= tsk_peer_node(tsk
);
307 if (likely(orig_node
== peer_node
))
310 if (!orig_node
&& peer_node
== self
)
313 if (!peer_node
&& orig_node
== self
)
319 /* tipc_set_sk_state - set the sk_state of the socket
322 * Caller must hold socket lock
324 * Returns 0 on success, errno otherwise
326 static int tipc_set_sk_state(struct sock
*sk
, int state
)
328 int oldsk_state
= sk
->sk_state
;
336 case TIPC_CONNECTING
:
337 if (oldsk_state
== TIPC_OPEN
)
340 case TIPC_ESTABLISHED
:
341 if (oldsk_state
== TIPC_CONNECTING
||
342 oldsk_state
== TIPC_OPEN
)
345 case TIPC_DISCONNECTING
:
346 if (oldsk_state
== TIPC_CONNECTING
||
347 oldsk_state
== TIPC_ESTABLISHED
)
353 sk
->sk_state
= state
;
358 static int tipc_sk_sock_err(struct socket
*sock
, long *timeout
)
360 struct sock
*sk
= sock
->sk
;
361 int err
= sock_error(sk
);
362 int typ
= sock
->type
;
366 if (typ
== SOCK_STREAM
|| typ
== SOCK_SEQPACKET
) {
367 if (sk
->sk_state
== TIPC_DISCONNECTING
)
369 else if (!tipc_sk_connected(sk
))
374 if (signal_pending(current
))
375 return sock_intr_errno(*timeout
);
380 #define tipc_wait_for_cond(sock_, timeo_, condition_) \
382 DEFINE_WAIT_FUNC(wait_, woken_wake_function); \
386 while ((rc_ = !(condition_))) { \
387 /* coupled with smp_wmb() in tipc_sk_proto_rcv() */ \
390 rc_ = tipc_sk_sock_err((sock_), timeo_); \
393 add_wait_queue(sk_sleep(sk_), &wait_); \
395 *(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \
396 sched_annotate_sleep(); \
398 remove_wait_queue(sk_sleep(sk_), &wait_); \
404 * tipc_sk_create - create a TIPC socket
405 * @net: network namespace (must be default network)
406 * @sock: pre-allocated socket structure
407 * @protocol: protocol indicator (must be 0)
408 * @kern: caused by kernel or by userspace?
410 * This routine creates additional data structures used by the TIPC socket,
411 * initializes them, and links them together.
413 * Returns 0 on success, errno otherwise
415 static int tipc_sk_create(struct net
*net
, struct socket
*sock
,
416 int protocol
, int kern
)
418 const struct proto_ops
*ops
;
420 struct tipc_sock
*tsk
;
421 struct tipc_msg
*msg
;
423 /* Validate arguments */
424 if (unlikely(protocol
!= 0))
425 return -EPROTONOSUPPORT
;
427 switch (sock
->type
) {
442 /* Allocate socket's protocol area */
443 sk
= sk_alloc(net
, AF_TIPC
, GFP_KERNEL
, &tipc_proto
, kern
);
448 tsk
->max_pkt
= MAX_PKT_DEFAULT
;
449 INIT_LIST_HEAD(&tsk
->publications
);
450 INIT_LIST_HEAD(&tsk
->cong_links
);
453 /* Finish initializing socket data structures */
455 sock_init_data(sock
, sk
);
456 tipc_set_sk_state(sk
, TIPC_OPEN
);
457 if (tipc_sk_insert(tsk
)) {
458 pr_warn("Socket create failed; port number exhausted\n");
462 /* Ensure tsk is visible before we read own_addr. */
465 tipc_msg_init(tipc_own_addr(net
), msg
, TIPC_LOW_IMPORTANCE
,
466 TIPC_NAMED_MSG
, NAMED_H_SIZE
, 0);
468 msg_set_origport(msg
, tsk
->portid
);
469 timer_setup(&sk
->sk_timer
, tipc_sk_timeout
, 0);
471 sk
->sk_backlog_rcv
= tipc_sk_backlog_rcv
;
472 sk
->sk_rcvbuf
= sysctl_tipc_rmem
[1];
473 sk
->sk_data_ready
= tipc_data_ready
;
474 sk
->sk_write_space
= tipc_write_space
;
475 sk
->sk_destruct
= tipc_sock_destruct
;
476 tsk
->conn_timeout
= CONN_TIMEOUT_DEFAULT
;
477 tsk
->group_is_open
= true;
478 atomic_set(&tsk
->dupl_rcvcnt
, 0);
480 /* Start out with safe limits until we receive an advertised window */
481 tsk
->snd_win
= tsk_adv_blocks(RCVBUF_MIN
);
482 tsk
->rcv_win
= tsk
->snd_win
;
484 if (tipc_sk_type_connectionless(sk
)) {
485 tsk_set_unreturnable(tsk
, true);
486 if (sock
->type
== SOCK_DGRAM
)
487 tsk_set_unreliable(tsk
, true);
489 __skb_queue_head_init(&tsk
->mc_method
.deferredq
);
490 trace_tipc_sk_create(sk
, NULL
, TIPC_DUMP_NONE
, " ");
494 static void tipc_sk_callback(struct rcu_head
*head
)
496 struct tipc_sock
*tsk
= container_of(head
, struct tipc_sock
, rcu
);
501 /* Caller should hold socket lock for the socket. */
502 static void __tipc_shutdown(struct socket
*sock
, int error
)
504 struct sock
*sk
= sock
->sk
;
505 struct tipc_sock
*tsk
= tipc_sk(sk
);
506 struct net
*net
= sock_net(sk
);
507 long timeout
= CONN_TIMEOUT_DEFAULT
;
508 u32 dnode
= tsk_peer_node(tsk
);
511 /* Avoid that hi-prio shutdown msgs bypass msgs in link wakeup queue */
512 tipc_wait_for_cond(sock
, &timeout
, (!tsk
->cong_link_cnt
&&
513 !tsk_conn_cong(tsk
)));
515 /* Remove any pending SYN message */
516 __skb_queue_purge(&sk
->sk_write_queue
);
518 /* Reject all unreceived messages, except on an active connection
519 * (which disconnects locally & sends a 'FIN+' to peer).
521 while ((skb
= __skb_dequeue(&sk
->sk_receive_queue
)) != NULL
) {
522 if (TIPC_SKB_CB(skb
)->bytes_read
) {
526 if (!tipc_sk_type_connectionless(sk
) &&
527 sk
->sk_state
!= TIPC_DISCONNECTING
) {
528 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
529 tipc_node_remove_conn(net
, dnode
, tsk
->portid
);
531 tipc_sk_respond(sk
, skb
, error
);
534 if (tipc_sk_type_connectionless(sk
))
537 if (sk
->sk_state
!= TIPC_DISCONNECTING
) {
538 skb
= tipc_msg_create(TIPC_CRITICAL_IMPORTANCE
,
539 TIPC_CONN_MSG
, SHORT_H_SIZE
, 0, dnode
,
540 tsk_own_node(tsk
), tsk_peer_port(tsk
),
543 tipc_node_xmit_skb(net
, skb
, dnode
, tsk
->portid
);
544 tipc_node_remove_conn(net
, dnode
, tsk
->portid
);
545 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
550 * tipc_release - destroy a TIPC socket
551 * @sock: socket to destroy
553 * This routine cleans up any messages that are still queued on the socket.
554 * For DGRAM and RDM socket types, all queued messages are rejected.
555 * For SEQPACKET and STREAM socket types, the first message is rejected
556 * and any others are discarded. (If the first message on a STREAM socket
557 * is partially-read, it is discarded and the next one is rejected instead.)
559 * NOTE: Rejected messages are not necessarily returned to the sender! They
560 * are returned or discarded according to the "destination droppable" setting
561 * specified for the message by the sender.
563 * Returns 0 on success, errno otherwise
565 static int tipc_release(struct socket
*sock
)
567 struct sock
*sk
= sock
->sk
;
568 struct tipc_sock
*tsk
;
571 * Exit if socket isn't fully initialized (occurs when a failed accept()
572 * releases a pre-allocated child socket that was never used)
580 trace_tipc_sk_release(sk
, NULL
, TIPC_DUMP_ALL
, " ");
581 __tipc_shutdown(sock
, TIPC_ERR_NO_PORT
);
582 sk
->sk_shutdown
= SHUTDOWN_MASK
;
584 tipc_sk_withdraw(tsk
, 0, NULL
);
585 __skb_queue_purge(&tsk
->mc_method
.deferredq
);
586 sk_stop_timer(sk
, &sk
->sk_timer
);
590 /* Reject any messages that accumulated in backlog queue */
592 tipc_dest_list_purge(&tsk
->cong_links
);
593 tsk
->cong_link_cnt
= 0;
594 call_rcu(&tsk
->rcu
, tipc_sk_callback
);
601 * tipc_bind - associate or disassocate TIPC name(s) with a socket
602 * @sock: socket structure
603 * @uaddr: socket address describing name(s) and desired operation
604 * @uaddr_len: size of socket address data structure
606 * Name and name sequence binding is indicated using a positive scope value;
607 * a negative scope value unbinds the specified name. Specifying no name
608 * (i.e. a socket address length of 0) unbinds all names from the socket.
610 * Returns 0 on success, errno otherwise
612 * NOTE: This routine doesn't need to take the socket lock since it doesn't
613 * access any non-constant socket information.
615 static int tipc_bind(struct socket
*sock
, struct sockaddr
*uaddr
,
618 struct sock
*sk
= sock
->sk
;
619 struct sockaddr_tipc
*addr
= (struct sockaddr_tipc
*)uaddr
;
620 struct tipc_sock
*tsk
= tipc_sk(sk
);
624 if (unlikely(!uaddr_len
)) {
625 res
= tipc_sk_withdraw(tsk
, 0, NULL
);
632 if (uaddr_len
< sizeof(struct sockaddr_tipc
)) {
636 if (addr
->family
!= AF_TIPC
) {
641 if (addr
->addrtype
== TIPC_ADDR_NAME
)
642 addr
->addr
.nameseq
.upper
= addr
->addr
.nameseq
.lower
;
643 else if (addr
->addrtype
!= TIPC_ADDR_NAMESEQ
) {
648 if ((addr
->addr
.nameseq
.type
< TIPC_RESERVED_TYPES
) &&
649 (addr
->addr
.nameseq
.type
!= TIPC_TOP_SRV
) &&
650 (addr
->addr
.nameseq
.type
!= TIPC_CFG_SRV
)) {
655 res
= (addr
->scope
>= 0) ?
656 tipc_sk_publish(tsk
, addr
->scope
, &addr
->addr
.nameseq
) :
657 tipc_sk_withdraw(tsk
, -addr
->scope
, &addr
->addr
.nameseq
);
664 * tipc_getname - get port ID of socket or peer socket
665 * @sock: socket structure
666 * @uaddr: area for returned socket address
667 * @uaddr_len: area for returned length of socket address
668 * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID
670 * Returns 0 on success, errno otherwise
672 * NOTE: This routine doesn't need to take the socket lock since it only
673 * accesses socket information that is unchanging (or which changes in
674 * a completely predictable manner).
676 static int tipc_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
679 struct sockaddr_tipc
*addr
= (struct sockaddr_tipc
*)uaddr
;
680 struct sock
*sk
= sock
->sk
;
681 struct tipc_sock
*tsk
= tipc_sk(sk
);
683 memset(addr
, 0, sizeof(*addr
));
685 if ((!tipc_sk_connected(sk
)) &&
686 ((peer
!= 2) || (sk
->sk_state
!= TIPC_DISCONNECTING
)))
688 addr
->addr
.id
.ref
= tsk_peer_port(tsk
);
689 addr
->addr
.id
.node
= tsk_peer_node(tsk
);
691 addr
->addr
.id
.ref
= tsk
->portid
;
692 addr
->addr
.id
.node
= tipc_own_addr(sock_net(sk
));
695 addr
->addrtype
= TIPC_ADDR_ID
;
696 addr
->family
= AF_TIPC
;
698 addr
->addr
.name
.domain
= 0;
700 return sizeof(*addr
);
704 * tipc_poll - read and possibly block on pollmask
705 * @file: file structure associated with the socket
706 * @sock: socket for which to calculate the poll bits
709 * Returns pollmask value
712 * It appears that the usual socket locking mechanisms are not useful here
713 * since the pollmask info is potentially out-of-date the moment this routine
714 * exits. TCP and other protocols seem to rely on higher level poll routines
715 * to handle any preventable race conditions, so TIPC will do the same ...
717 * IMPORTANT: The fact that a read or write operation is indicated does NOT
718 * imply that the operation will succeed, merely that it should be performed
719 * and will not block.
721 static __poll_t
tipc_poll(struct file
*file
, struct socket
*sock
,
724 struct sock
*sk
= sock
->sk
;
725 struct tipc_sock
*tsk
= tipc_sk(sk
);
726 __poll_t revents
= 0;
728 sock_poll_wait(file
, sock
, wait
);
729 trace_tipc_sk_poll(sk
, NULL
, TIPC_DUMP_ALL
, " ");
731 if (sk
->sk_shutdown
& RCV_SHUTDOWN
)
732 revents
|= EPOLLRDHUP
| EPOLLIN
| EPOLLRDNORM
;
733 if (sk
->sk_shutdown
== SHUTDOWN_MASK
)
736 switch (sk
->sk_state
) {
737 case TIPC_ESTABLISHED
:
738 if (!tsk
->cong_link_cnt
&& !tsk_conn_cong(tsk
))
742 case TIPC_CONNECTING
:
743 if (!skb_queue_empty(&sk
->sk_receive_queue
))
744 revents
|= EPOLLIN
| EPOLLRDNORM
;
747 if (tsk
->group_is_open
&& !tsk
->cong_link_cnt
)
749 if (!tipc_sk_type_connectionless(sk
))
751 if (skb_queue_empty(&sk
->sk_receive_queue
))
753 revents
|= EPOLLIN
| EPOLLRDNORM
;
755 case TIPC_DISCONNECTING
:
756 revents
= EPOLLIN
| EPOLLRDNORM
| EPOLLHUP
;
763 * tipc_sendmcast - send multicast message
764 * @sock: socket structure
765 * @seq: destination address
766 * @msg: message to send
767 * @dlen: length of data to send
768 * @timeout: timeout to wait for wakeup
770 * Called from function tipc_sendmsg(), which has done all sanity checks
771 * Returns the number of bytes sent on success, or errno
773 static int tipc_sendmcast(struct socket
*sock
, struct tipc_name_seq
*seq
,
774 struct msghdr
*msg
, size_t dlen
, long timeout
)
776 struct sock
*sk
= sock
->sk
;
777 struct tipc_sock
*tsk
= tipc_sk(sk
);
778 struct tipc_msg
*hdr
= &tsk
->phdr
;
779 struct net
*net
= sock_net(sk
);
780 int mtu
= tipc_bcast_get_mtu(net
);
781 struct tipc_mc_method
*method
= &tsk
->mc_method
;
782 struct sk_buff_head pkts
;
783 struct tipc_nlist dsts
;
789 /* Block or return if any destination link is congested */
790 rc
= tipc_wait_for_cond(sock
, &timeout
, !tsk
->cong_link_cnt
);
794 /* Lookup destination nodes */
795 tipc_nlist_init(&dsts
, tipc_own_addr(net
));
796 tipc_nametbl_lookup_dst_nodes(net
, seq
->type
, seq
->lower
,
798 if (!dsts
.local
&& !dsts
.remote
)
799 return -EHOSTUNREACH
;
801 /* Build message header */
802 msg_set_type(hdr
, TIPC_MCAST_MSG
);
803 msg_set_hdr_sz(hdr
, MCAST_H_SIZE
);
804 msg_set_lookup_scope(hdr
, TIPC_CLUSTER_SCOPE
);
805 msg_set_destport(hdr
, 0);
806 msg_set_destnode(hdr
, 0);
807 msg_set_nametype(hdr
, seq
->type
);
808 msg_set_namelower(hdr
, seq
->lower
);
809 msg_set_nameupper(hdr
, seq
->upper
);
811 /* Build message as chain of buffers */
812 __skb_queue_head_init(&pkts
);
813 rc
= tipc_msg_build(hdr
, msg
, 0, dlen
, mtu
, &pkts
);
815 /* Send message if build was successful */
816 if (unlikely(rc
== dlen
)) {
817 trace_tipc_sk_sendmcast(sk
, skb_peek(&pkts
),
818 TIPC_DUMP_SK_SNDQ
, " ");
819 rc
= tipc_mcast_xmit(net
, &pkts
, method
, &dsts
,
820 &tsk
->cong_link_cnt
);
823 tipc_nlist_purge(&dsts
);
825 return rc
? rc
: dlen
;
829 * tipc_send_group_msg - send a message to a member in the group
830 * @net: network namespace
831 * @m: message to send
833 * @dnode: destination node
834 * @dport: destination port
835 * @dlen: total length of message data
837 static int tipc_send_group_msg(struct net
*net
, struct tipc_sock
*tsk
,
838 struct msghdr
*m
, struct tipc_member
*mb
,
839 u32 dnode
, u32 dport
, int dlen
)
841 u16 bc_snd_nxt
= tipc_group_bc_snd_nxt(tsk
->group
);
842 struct tipc_mc_method
*method
= &tsk
->mc_method
;
843 int blks
= tsk_blocks(GROUP_H_SIZE
+ dlen
);
844 struct tipc_msg
*hdr
= &tsk
->phdr
;
845 struct sk_buff_head pkts
;
848 /* Complete message header */
849 msg_set_type(hdr
, TIPC_GRP_UCAST_MSG
);
850 msg_set_hdr_sz(hdr
, GROUP_H_SIZE
);
851 msg_set_destport(hdr
, dport
);
852 msg_set_destnode(hdr
, dnode
);
853 msg_set_grp_bc_seqno(hdr
, bc_snd_nxt
);
855 /* Build message as chain of buffers */
856 __skb_queue_head_init(&pkts
);
857 mtu
= tipc_node_get_mtu(net
, dnode
, tsk
->portid
);
858 rc
= tipc_msg_build(hdr
, m
, 0, dlen
, mtu
, &pkts
);
859 if (unlikely(rc
!= dlen
))
863 rc
= tipc_node_xmit(net
, &pkts
, dnode
, tsk
->portid
);
864 if (unlikely(rc
== -ELINKCONG
)) {
865 tipc_dest_push(&tsk
->cong_links
, dnode
, 0);
866 tsk
->cong_link_cnt
++;
869 /* Update send window */
870 tipc_group_update_member(mb
, blks
);
872 /* A broadcast sent within next EXPIRE period must follow same path */
873 method
->rcast
= true;
874 method
->mandatory
= true;
879 * tipc_send_group_unicast - send message to a member in the group
880 * @sock: socket structure
881 * @m: message to send
882 * @dlen: total length of message data
883 * @timeout: timeout to wait for wakeup
885 * Called from function tipc_sendmsg(), which has done all sanity checks
886 * Returns the number of bytes sent on success, or errno
888 static int tipc_send_group_unicast(struct socket
*sock
, struct msghdr
*m
,
889 int dlen
, long timeout
)
891 struct sock
*sk
= sock
->sk
;
892 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
893 int blks
= tsk_blocks(GROUP_H_SIZE
+ dlen
);
894 struct tipc_sock
*tsk
= tipc_sk(sk
);
895 struct net
*net
= sock_net(sk
);
896 struct tipc_member
*mb
= NULL
;
900 node
= dest
->addr
.id
.node
;
901 port
= dest
->addr
.id
.ref
;
903 return -EHOSTUNREACH
;
905 /* Block or return if destination link or member is congested */
906 rc
= tipc_wait_for_cond(sock
, &timeout
,
907 !tipc_dest_find(&tsk
->cong_links
, node
, 0) &&
909 !tipc_group_cong(tsk
->group
, node
, port
, blks
,
915 return -EHOSTUNREACH
;
917 rc
= tipc_send_group_msg(net
, tsk
, m
, mb
, node
, port
, dlen
);
919 return rc
? rc
: dlen
;
923 * tipc_send_group_anycast - send message to any member with given identity
924 * @sock: socket structure
925 * @m: message to send
926 * @dlen: total length of message data
927 * @timeout: timeout to wait for wakeup
929 * Called from function tipc_sendmsg(), which has done all sanity checks
930 * Returns the number of bytes sent on success, or errno
932 static int tipc_send_group_anycast(struct socket
*sock
, struct msghdr
*m
,
933 int dlen
, long timeout
)
935 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
936 struct sock
*sk
= sock
->sk
;
937 struct tipc_sock
*tsk
= tipc_sk(sk
);
938 struct list_head
*cong_links
= &tsk
->cong_links
;
939 int blks
= tsk_blocks(GROUP_H_SIZE
+ dlen
);
940 struct tipc_msg
*hdr
= &tsk
->phdr
;
941 struct tipc_member
*first
= NULL
;
942 struct tipc_member
*mbr
= NULL
;
943 struct net
*net
= sock_net(sk
);
944 u32 node
, port
, exclude
;
945 struct list_head dsts
;
946 u32 type
, inst
, scope
;
951 INIT_LIST_HEAD(&dsts
);
953 type
= msg_nametype(hdr
);
954 inst
= dest
->addr
.name
.name
.instance
;
955 scope
= msg_lookup_scope(hdr
);
957 while (++lookups
< 4) {
958 exclude
= tipc_group_exclude(tsk
->group
);
962 /* Look for a non-congested destination member, if any */
964 if (!tipc_nametbl_lookup(net
, type
, inst
, scope
, &dsts
,
965 &dstcnt
, exclude
, false))
966 return -EHOSTUNREACH
;
967 tipc_dest_pop(&dsts
, &node
, &port
);
968 cong
= tipc_group_cong(tsk
->group
, node
, port
, blks
,
978 /* Start over if destination was not in member list */
982 if (likely(!cong
&& !tipc_dest_find(cong_links
, node
, 0)))
985 /* Block or return if destination link or member is congested */
986 rc
= tipc_wait_for_cond(sock
, &timeout
,
987 !tipc_dest_find(cong_links
, node
, 0) &&
989 !tipc_group_cong(tsk
->group
, node
, port
,
994 /* Send, unless destination disappeared while waiting */
999 if (unlikely(lookups
>= 4))
1000 return -EHOSTUNREACH
;
1002 rc
= tipc_send_group_msg(net
, tsk
, m
, mbr
, node
, port
, dlen
);
1004 return rc
? rc
: dlen
;
1008 * tipc_send_group_bcast - send message to all members in communication group
1009 * @sk: socket structure
1010 * @m: message to send
1011 * @dlen: total length of message data
1012 * @timeout: timeout to wait for wakeup
1014 * Called from function tipc_sendmsg(), which has done all sanity checks
1015 * Returns the number of bytes sent on success, or errno
1017 static int tipc_send_group_bcast(struct socket
*sock
, struct msghdr
*m
,
1018 int dlen
, long timeout
)
1020 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
1021 struct sock
*sk
= sock
->sk
;
1022 struct net
*net
= sock_net(sk
);
1023 struct tipc_sock
*tsk
= tipc_sk(sk
);
1024 struct tipc_nlist
*dsts
;
1025 struct tipc_mc_method
*method
= &tsk
->mc_method
;
1026 bool ack
= method
->mandatory
&& method
->rcast
;
1027 int blks
= tsk_blocks(MCAST_H_SIZE
+ dlen
);
1028 struct tipc_msg
*hdr
= &tsk
->phdr
;
1029 int mtu
= tipc_bcast_get_mtu(net
);
1030 struct sk_buff_head pkts
;
1031 int rc
= -EHOSTUNREACH
;
1033 /* Block or return if any destination link or member is congested */
1034 rc
= tipc_wait_for_cond(sock
, &timeout
,
1035 !tsk
->cong_link_cnt
&& tsk
->group
&&
1036 !tipc_group_bc_cong(tsk
->group
, blks
));
1040 dsts
= tipc_group_dests(tsk
->group
);
1041 if (!dsts
->local
&& !dsts
->remote
)
1042 return -EHOSTUNREACH
;
1044 /* Complete message header */
1046 msg_set_type(hdr
, TIPC_GRP_MCAST_MSG
);
1047 msg_set_nameinst(hdr
, dest
->addr
.name
.name
.instance
);
1049 msg_set_type(hdr
, TIPC_GRP_BCAST_MSG
);
1050 msg_set_nameinst(hdr
, 0);
1052 msg_set_hdr_sz(hdr
, GROUP_H_SIZE
);
1053 msg_set_destport(hdr
, 0);
1054 msg_set_destnode(hdr
, 0);
1055 msg_set_grp_bc_seqno(hdr
, tipc_group_bc_snd_nxt(tsk
->group
));
1057 /* Avoid getting stuck with repeated forced replicasts */
1058 msg_set_grp_bc_ack_req(hdr
, ack
);
1060 /* Build message as chain of buffers */
1061 __skb_queue_head_init(&pkts
);
1062 rc
= tipc_msg_build(hdr
, m
, 0, dlen
, mtu
, &pkts
);
1063 if (unlikely(rc
!= dlen
))
1067 rc
= tipc_mcast_xmit(net
, &pkts
, method
, dsts
, &tsk
->cong_link_cnt
);
1071 /* Update broadcast sequence number and send windows */
1072 tipc_group_update_bc_members(tsk
->group
, blks
, ack
);
1074 /* Broadcast link is now free to choose method for next broadcast */
1075 method
->mandatory
= false;
1076 method
->expires
= jiffies
;
1082 * tipc_send_group_mcast - send message to all members with given identity
1083 * @sock: socket structure
1084 * @m: message to send
1085 * @dlen: total length of message data
1086 * @timeout: timeout to wait for wakeup
1088 * Called from function tipc_sendmsg(), which has done all sanity checks
1089 * Returns the number of bytes sent on success, or errno
1091 static int tipc_send_group_mcast(struct socket
*sock
, struct msghdr
*m
,
1092 int dlen
, long timeout
)
1094 struct sock
*sk
= sock
->sk
;
1095 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
1096 struct tipc_sock
*tsk
= tipc_sk(sk
);
1097 struct tipc_group
*grp
= tsk
->group
;
1098 struct tipc_msg
*hdr
= &tsk
->phdr
;
1099 struct net
*net
= sock_net(sk
);
1100 u32 type
, inst
, scope
, exclude
;
1101 struct list_head dsts
;
1104 INIT_LIST_HEAD(&dsts
);
1106 type
= msg_nametype(hdr
);
1107 inst
= dest
->addr
.name
.name
.instance
;
1108 scope
= msg_lookup_scope(hdr
);
1109 exclude
= tipc_group_exclude(grp
);
1111 if (!tipc_nametbl_lookup(net
, type
, inst
, scope
, &dsts
,
1112 &dstcnt
, exclude
, true))
1113 return -EHOSTUNREACH
;
1116 tipc_dest_pop(&dsts
, &dest
->addr
.id
.node
, &dest
->addr
.id
.ref
);
1117 return tipc_send_group_unicast(sock
, m
, dlen
, timeout
);
1120 tipc_dest_list_purge(&dsts
);
1121 return tipc_send_group_bcast(sock
, m
, dlen
, timeout
);
1125 * tipc_sk_mcast_rcv - Deliver multicast messages to all destination sockets
1126 * @arrvq: queue with arriving messages, to be cloned after destination lookup
1127 * @inputq: queue with cloned messages, delivered to socket after dest lookup
1129 * Multi-threaded: parallel calls with reference to same queues may occur
1131 void tipc_sk_mcast_rcv(struct net
*net
, struct sk_buff_head
*arrvq
,
1132 struct sk_buff_head
*inputq
)
1134 u32 self
= tipc_own_addr(net
);
1135 u32 type
, lower
, upper
, scope
;
1136 struct sk_buff
*skb
, *_skb
;
1138 struct sk_buff_head tmpq
;
1139 struct list_head dports
;
1140 struct tipc_msg
*hdr
;
1141 int user
, mtyp
, hlen
;
1144 __skb_queue_head_init(&tmpq
);
1145 INIT_LIST_HEAD(&dports
);
1147 skb
= tipc_skb_peek(arrvq
, &inputq
->lock
);
1148 for (; skb
; skb
= tipc_skb_peek(arrvq
, &inputq
->lock
)) {
1150 user
= msg_user(hdr
);
1151 mtyp
= msg_type(hdr
);
1152 hlen
= skb_headroom(skb
) + msg_hdr_sz(hdr
);
1153 onode
= msg_orignode(hdr
);
1154 type
= msg_nametype(hdr
);
1156 if (mtyp
== TIPC_GRP_UCAST_MSG
|| user
== GROUP_PROTOCOL
) {
1157 spin_lock_bh(&inputq
->lock
);
1158 if (skb_peek(arrvq
) == skb
) {
1159 __skb_dequeue(arrvq
);
1160 __skb_queue_tail(inputq
, skb
);
1163 spin_unlock_bh(&inputq
->lock
);
1167 /* Group messages require exact scope match */
1168 if (msg_in_group(hdr
)) {
1171 scope
= msg_lookup_scope(hdr
);
1174 /* TIPC_NODE_SCOPE means "any scope" in this context */
1176 scope
= TIPC_NODE_SCOPE
;
1178 scope
= TIPC_CLUSTER_SCOPE
;
1180 lower
= msg_namelower(hdr
);
1181 upper
= msg_nameupper(hdr
);
1184 /* Create destination port list: */
1185 tipc_nametbl_mc_lookup(net
, type
, lower
, upper
,
1186 scope
, exact
, &dports
);
1188 /* Clone message per destination */
1189 while (tipc_dest_pop(&dports
, NULL
, &portid
)) {
1190 _skb
= __pskb_copy(skb
, hlen
, GFP_ATOMIC
);
1192 msg_set_destport(buf_msg(_skb
), portid
);
1193 __skb_queue_tail(&tmpq
, _skb
);
1196 pr_warn("Failed to clone mcast rcv buffer\n");
1198 /* Append to inputq if not already done by other thread */
1199 spin_lock_bh(&inputq
->lock
);
1200 if (skb_peek(arrvq
) == skb
) {
1201 skb_queue_splice_tail_init(&tmpq
, inputq
);
1202 kfree_skb(__skb_dequeue(arrvq
));
1204 spin_unlock_bh(&inputq
->lock
);
1205 __skb_queue_purge(&tmpq
);
1208 tipc_sk_rcv(net
, inputq
);
1212 * tipc_sk_conn_proto_rcv - receive a connection mng protocol message
1213 * @tsk: receiving socket
1214 * @skb: pointer to message buffer.
1216 static void tipc_sk_conn_proto_rcv(struct tipc_sock
*tsk
, struct sk_buff
*skb
,
1217 struct sk_buff_head
*inputq
,
1218 struct sk_buff_head
*xmitq
)
1220 struct tipc_msg
*hdr
= buf_msg(skb
);
1221 u32 onode
= tsk_own_node(tsk
);
1222 struct sock
*sk
= &tsk
->sk
;
1223 int mtyp
= msg_type(hdr
);
1226 /* Ignore if connection cannot be validated: */
1227 if (!tsk_peer_msg(tsk
, hdr
)) {
1228 trace_tipc_sk_drop_msg(sk
, skb
, TIPC_DUMP_NONE
, "@proto_rcv!");
1232 if (unlikely(msg_errcode(hdr
))) {
1233 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
1234 tipc_node_remove_conn(sock_net(sk
), tsk_peer_node(tsk
),
1235 tsk_peer_port(tsk
));
1236 sk
->sk_state_change(sk
);
1238 /* State change is ignored if socket already awake,
1239 * - convert msg to abort msg and add to inqueue
1241 msg_set_user(hdr
, TIPC_CRITICAL_IMPORTANCE
);
1242 msg_set_type(hdr
, TIPC_CONN_MSG
);
1243 msg_set_size(hdr
, BASIC_H_SIZE
);
1244 msg_set_hdr_sz(hdr
, BASIC_H_SIZE
);
1245 __skb_queue_tail(inputq
, skb
);
1249 tsk
->probe_unacked
= false;
1251 if (mtyp
== CONN_PROBE
) {
1252 msg_set_type(hdr
, CONN_PROBE_REPLY
);
1253 if (tipc_msg_reverse(onode
, &skb
, TIPC_OK
))
1254 __skb_queue_tail(xmitq
, skb
);
1256 } else if (mtyp
== CONN_ACK
) {
1257 conn_cong
= tsk_conn_cong(tsk
);
1258 tsk
->snt_unacked
-= msg_conn_ack(hdr
);
1259 if (tsk
->peer_caps
& TIPC_BLOCK_FLOWCTL
)
1260 tsk
->snd_win
= msg_adv_win(hdr
);
1262 sk
->sk_write_space(sk
);
1263 } else if (mtyp
!= CONN_PROBE_REPLY
) {
1264 pr_warn("Received unknown CONN_PROTO msg\n");
1271 * tipc_sendmsg - send message in connectionless manner
1272 * @sock: socket structure
1273 * @m: message to send
1274 * @dsz: amount of user data to be sent
1276 * Message must have an destination specified explicitly.
1277 * Used for SOCK_RDM and SOCK_DGRAM messages,
1278 * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
1279 * (Note: 'SYN+' is prohibited on SOCK_STREAM.)
1281 * Returns the number of bytes sent on success, or errno otherwise
1283 static int tipc_sendmsg(struct socket
*sock
,
1284 struct msghdr
*m
, size_t dsz
)
1286 struct sock
*sk
= sock
->sk
;
1290 ret
= __tipc_sendmsg(sock
, m
, dsz
);
1296 static int __tipc_sendmsg(struct socket
*sock
, struct msghdr
*m
, size_t dlen
)
1298 struct sock
*sk
= sock
->sk
;
1299 struct net
*net
= sock_net(sk
);
1300 struct tipc_sock
*tsk
= tipc_sk(sk
);
1301 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
1302 long timeout
= sock_sndtimeo(sk
, m
->msg_flags
& MSG_DONTWAIT
);
1303 struct list_head
*clinks
= &tsk
->cong_links
;
1304 bool syn
= !tipc_sk_type_connectionless(sk
);
1305 struct tipc_group
*grp
= tsk
->group
;
1306 struct tipc_msg
*hdr
= &tsk
->phdr
;
1307 struct tipc_name_seq
*seq
;
1308 struct sk_buff_head pkts
;
1309 u32 dport
, dnode
= 0;
1313 if (unlikely(dlen
> TIPC_MAX_USER_MSG_SIZE
))
1317 if (unlikely(m
->msg_namelen
< sizeof(*dest
)))
1319 if (unlikely(dest
->family
!= AF_TIPC
))
1325 return tipc_send_group_bcast(sock
, m
, dlen
, timeout
);
1326 if (dest
->addrtype
== TIPC_ADDR_NAME
)
1327 return tipc_send_group_anycast(sock
, m
, dlen
, timeout
);
1328 if (dest
->addrtype
== TIPC_ADDR_ID
)
1329 return tipc_send_group_unicast(sock
, m
, dlen
, timeout
);
1330 if (dest
->addrtype
== TIPC_ADDR_MCAST
)
1331 return tipc_send_group_mcast(sock
, m
, dlen
, timeout
);
1335 if (unlikely(!dest
)) {
1337 if (!syn
&& dest
->family
!= AF_TIPC
)
1338 return -EDESTADDRREQ
;
1341 if (unlikely(syn
)) {
1342 if (sk
->sk_state
== TIPC_LISTEN
)
1344 if (sk
->sk_state
!= TIPC_OPEN
)
1348 if (dest
->addrtype
== TIPC_ADDR_NAME
) {
1349 tsk
->conn_type
= dest
->addr
.name
.name
.type
;
1350 tsk
->conn_instance
= dest
->addr
.name
.name
.instance
;
1352 msg_set_syn(hdr
, 1);
1355 seq
= &dest
->addr
.nameseq
;
1356 if (dest
->addrtype
== TIPC_ADDR_MCAST
)
1357 return tipc_sendmcast(sock
, seq
, m
, dlen
, timeout
);
1359 if (dest
->addrtype
== TIPC_ADDR_NAME
) {
1360 type
= dest
->addr
.name
.name
.type
;
1361 inst
= dest
->addr
.name
.name
.instance
;
1362 dnode
= dest
->addr
.name
.domain
;
1363 msg_set_type(hdr
, TIPC_NAMED_MSG
);
1364 msg_set_hdr_sz(hdr
, NAMED_H_SIZE
);
1365 msg_set_nametype(hdr
, type
);
1366 msg_set_nameinst(hdr
, inst
);
1367 msg_set_lookup_scope(hdr
, tipc_node2scope(dnode
));
1368 dport
= tipc_nametbl_translate(net
, type
, inst
, &dnode
);
1369 msg_set_destnode(hdr
, dnode
);
1370 msg_set_destport(hdr
, dport
);
1371 if (unlikely(!dport
&& !dnode
))
1372 return -EHOSTUNREACH
;
1373 } else if (dest
->addrtype
== TIPC_ADDR_ID
) {
1374 dnode
= dest
->addr
.id
.node
;
1375 msg_set_type(hdr
, TIPC_DIRECT_MSG
);
1376 msg_set_lookup_scope(hdr
, 0);
1377 msg_set_destnode(hdr
, dnode
);
1378 msg_set_destport(hdr
, dest
->addr
.id
.ref
);
1379 msg_set_hdr_sz(hdr
, BASIC_H_SIZE
);
1384 /* Block or return if destination link is congested */
1385 rc
= tipc_wait_for_cond(sock
, &timeout
,
1386 !tipc_dest_find(clinks
, dnode
, 0));
1390 __skb_queue_head_init(&pkts
);
1391 mtu
= tipc_node_get_mtu(net
, dnode
, tsk
->portid
);
1392 rc
= tipc_msg_build(hdr
, m
, 0, dlen
, mtu
, &pkts
);
1393 if (unlikely(rc
!= dlen
))
1395 if (unlikely(syn
&& !tipc_msg_skb_clone(&pkts
, &sk
->sk_write_queue
)))
1398 trace_tipc_sk_sendmsg(sk
, skb_peek(&pkts
), TIPC_DUMP_SK_SNDQ
, " ");
1399 rc
= tipc_node_xmit(net
, &pkts
, dnode
, tsk
->portid
);
1400 if (unlikely(rc
== -ELINKCONG
)) {
1401 tipc_dest_push(clinks
, dnode
, 0);
1402 tsk
->cong_link_cnt
++;
1406 if (unlikely(syn
&& !rc
))
1407 tipc_set_sk_state(sk
, TIPC_CONNECTING
);
1409 return rc
? rc
: dlen
;
1413 * tipc_sendstream - send stream-oriented data
1414 * @sock: socket structure
1416 * @dsz: total length of data to be transmitted
1418 * Used for SOCK_STREAM data.
1420 * Returns the number of bytes sent on success (or partial success),
1421 * or errno if no data sent
1423 static int tipc_sendstream(struct socket
*sock
, struct msghdr
*m
, size_t dsz
)
1425 struct sock
*sk
= sock
->sk
;
1429 ret
= __tipc_sendstream(sock
, m
, dsz
);
1435 static int __tipc_sendstream(struct socket
*sock
, struct msghdr
*m
, size_t dlen
)
1437 struct sock
*sk
= sock
->sk
;
1438 DECLARE_SOCKADDR(struct sockaddr_tipc
*, dest
, m
->msg_name
);
1439 long timeout
= sock_sndtimeo(sk
, m
->msg_flags
& MSG_DONTWAIT
);
1440 struct tipc_sock
*tsk
= tipc_sk(sk
);
1441 struct tipc_msg
*hdr
= &tsk
->phdr
;
1442 struct net
*net
= sock_net(sk
);
1443 struct sk_buff_head pkts
;
1444 u32 dnode
= tsk_peer_node(tsk
);
1448 __skb_queue_head_init(&pkts
);
1450 if (unlikely(dlen
> INT_MAX
))
1453 /* Handle implicit connection setup */
1454 if (unlikely(dest
)) {
1455 rc
= __tipc_sendmsg(sock
, m
, dlen
);
1456 if (dlen
&& dlen
== rc
) {
1457 tsk
->peer_caps
= tipc_node_get_capabilities(net
, dnode
);
1458 tsk
->snt_unacked
= tsk_inc(tsk
, dlen
+ msg_hdr_sz(hdr
));
1464 rc
= tipc_wait_for_cond(sock
, &timeout
,
1465 (!tsk
->cong_link_cnt
&&
1466 !tsk_conn_cong(tsk
) &&
1467 tipc_sk_connected(sk
)));
1471 send
= min_t(size_t, dlen
- sent
, TIPC_MAX_USER_MSG_SIZE
);
1472 rc
= tipc_msg_build(hdr
, m
, sent
, send
, tsk
->max_pkt
, &pkts
);
1473 if (unlikely(rc
!= send
))
1476 trace_tipc_sk_sendstream(sk
, skb_peek(&pkts
),
1477 TIPC_DUMP_SK_SNDQ
, " ");
1478 rc
= tipc_node_xmit(net
, &pkts
, dnode
, tsk
->portid
);
1479 if (unlikely(rc
== -ELINKCONG
)) {
1480 tsk
->cong_link_cnt
= 1;
1484 tsk
->snt_unacked
+= tsk_inc(tsk
, send
+ MIN_H_SIZE
);
1487 } while (sent
< dlen
&& !rc
);
1489 return sent
? sent
: rc
;
1493 * tipc_send_packet - send a connection-oriented message
1494 * @sock: socket structure
1495 * @m: message to send
1496 * @dsz: length of data to be transmitted
1498 * Used for SOCK_SEQPACKET messages.
1500 * Returns the number of bytes sent on success, or errno otherwise
1502 static int tipc_send_packet(struct socket
*sock
, struct msghdr
*m
, size_t dsz
)
1504 if (dsz
> TIPC_MAX_USER_MSG_SIZE
)
1507 return tipc_sendstream(sock
, m
, dsz
);
1510 /* tipc_sk_finish_conn - complete the setup of a connection
1512 static void tipc_sk_finish_conn(struct tipc_sock
*tsk
, u32 peer_port
,
1515 struct sock
*sk
= &tsk
->sk
;
1516 struct net
*net
= sock_net(sk
);
1517 struct tipc_msg
*msg
= &tsk
->phdr
;
1519 msg_set_syn(msg
, 0);
1520 msg_set_destnode(msg
, peer_node
);
1521 msg_set_destport(msg
, peer_port
);
1522 msg_set_type(msg
, TIPC_CONN_MSG
);
1523 msg_set_lookup_scope(msg
, 0);
1524 msg_set_hdr_sz(msg
, SHORT_H_SIZE
);
1526 sk_reset_timer(sk
, &sk
->sk_timer
, jiffies
+ CONN_PROBING_INTV
);
1527 tipc_set_sk_state(sk
, TIPC_ESTABLISHED
);
1528 tipc_node_add_conn(net
, peer_node
, tsk
->portid
, peer_port
);
1529 tsk
->max_pkt
= tipc_node_get_mtu(net
, peer_node
, tsk
->portid
);
1530 tsk
->peer_caps
= tipc_node_get_capabilities(net
, peer_node
);
1531 __skb_queue_purge(&sk
->sk_write_queue
);
1532 if (tsk
->peer_caps
& TIPC_BLOCK_FLOWCTL
)
1535 /* Fall back to message based flow control */
1536 tsk
->rcv_win
= FLOWCTL_MSG_WIN
;
1537 tsk
->snd_win
= FLOWCTL_MSG_WIN
;
1541 * tipc_sk_set_orig_addr - capture sender's address for received message
1542 * @m: descriptor for message info
1543 * @hdr: received message header
1545 * Note: Address is not captured if not requested by receiver.
1547 static void tipc_sk_set_orig_addr(struct msghdr
*m
, struct sk_buff
*skb
)
1549 DECLARE_SOCKADDR(struct sockaddr_pair
*, srcaddr
, m
->msg_name
);
1550 struct tipc_msg
*hdr
= buf_msg(skb
);
1555 srcaddr
->sock
.family
= AF_TIPC
;
1556 srcaddr
->sock
.addrtype
= TIPC_ADDR_ID
;
1557 srcaddr
->sock
.scope
= 0;
1558 srcaddr
->sock
.addr
.id
.ref
= msg_origport(hdr
);
1559 srcaddr
->sock
.addr
.id
.node
= msg_orignode(hdr
);
1560 srcaddr
->sock
.addr
.name
.domain
= 0;
1561 m
->msg_namelen
= sizeof(struct sockaddr_tipc
);
1563 if (!msg_in_group(hdr
))
1566 /* Group message users may also want to know sending member's id */
1567 srcaddr
->member
.family
= AF_TIPC
;
1568 srcaddr
->member
.addrtype
= TIPC_ADDR_NAME
;
1569 srcaddr
->member
.scope
= 0;
1570 srcaddr
->member
.addr
.name
.name
.type
= msg_nametype(hdr
);
1571 srcaddr
->member
.addr
.name
.name
.instance
= TIPC_SKB_CB(skb
)->orig_member
;
1572 srcaddr
->member
.addr
.name
.domain
= 0;
1573 m
->msg_namelen
= sizeof(*srcaddr
);
1577 * tipc_sk_anc_data_recv - optionally capture ancillary data for received message
1578 * @m: descriptor for message info
1579 * @skb: received message buffer
1580 * @tsk: TIPC port associated with message
1582 * Note: Ancillary data is not captured if not requested by receiver.
1584 * Returns 0 if successful, otherwise errno
1586 static int tipc_sk_anc_data_recv(struct msghdr
*m
, struct sk_buff
*skb
,
1587 struct tipc_sock
*tsk
)
1589 struct tipc_msg
*msg
;
1596 if (likely(m
->msg_controllen
== 0))
1600 /* Optionally capture errored message object(s) */
1601 err
= msg
? msg_errcode(msg
) : 0;
1602 if (unlikely(err
)) {
1604 anc_data
[1] = msg_data_sz(msg
);
1605 res
= put_cmsg(m
, SOL_TIPC
, TIPC_ERRINFO
, 8, anc_data
);
1609 if (skb_linearize(skb
))
1612 res
= put_cmsg(m
, SOL_TIPC
, TIPC_RETDATA
, anc_data
[1],
1619 /* Optionally capture message destination object */
1620 dest_type
= msg
? msg_type(msg
) : TIPC_DIRECT_MSG
;
1621 switch (dest_type
) {
1622 case TIPC_NAMED_MSG
:
1624 anc_data
[0] = msg_nametype(msg
);
1625 anc_data
[1] = msg_namelower(msg
);
1626 anc_data
[2] = msg_namelower(msg
);
1628 case TIPC_MCAST_MSG
:
1630 anc_data
[0] = msg_nametype(msg
);
1631 anc_data
[1] = msg_namelower(msg
);
1632 anc_data
[2] = msg_nameupper(msg
);
1635 has_name
= (tsk
->conn_type
!= 0);
1636 anc_data
[0] = tsk
->conn_type
;
1637 anc_data
[1] = tsk
->conn_instance
;
1638 anc_data
[2] = tsk
->conn_instance
;
1644 res
= put_cmsg(m
, SOL_TIPC
, TIPC_DESTNAME
, 12, anc_data
);
1652 static void tipc_sk_send_ack(struct tipc_sock
*tsk
)
1654 struct sock
*sk
= &tsk
->sk
;
1655 struct net
*net
= sock_net(sk
);
1656 struct sk_buff
*skb
= NULL
;
1657 struct tipc_msg
*msg
;
1658 u32 peer_port
= tsk_peer_port(tsk
);
1659 u32 dnode
= tsk_peer_node(tsk
);
1661 if (!tipc_sk_connected(sk
))
1663 skb
= tipc_msg_create(CONN_MANAGER
, CONN_ACK
, INT_H_SIZE
, 0,
1664 dnode
, tsk_own_node(tsk
), peer_port
,
1665 tsk
->portid
, TIPC_OK
);
1669 msg_set_conn_ack(msg
, tsk
->rcv_unacked
);
1670 tsk
->rcv_unacked
= 0;
1672 /* Adjust to and advertize the correct window limit */
1673 if (tsk
->peer_caps
& TIPC_BLOCK_FLOWCTL
) {
1674 tsk
->rcv_win
= tsk_adv_blocks(tsk
->sk
.sk_rcvbuf
);
1675 msg_set_adv_win(msg
, tsk
->rcv_win
);
1677 tipc_node_xmit_skb(net
, skb
, dnode
, msg_link_selector(msg
));
1680 static int tipc_wait_for_rcvmsg(struct socket
*sock
, long *timeop
)
1682 struct sock
*sk
= sock
->sk
;
1683 DEFINE_WAIT_FUNC(wait
, woken_wake_function
);
1684 long timeo
= *timeop
;
1685 int err
= sock_error(sk
);
1691 if (timeo
&& skb_queue_empty(&sk
->sk_receive_queue
)) {
1692 if (sk
->sk_shutdown
& RCV_SHUTDOWN
) {
1696 add_wait_queue(sk_sleep(sk
), &wait
);
1698 timeo
= wait_woken(&wait
, TASK_INTERRUPTIBLE
, timeo
);
1699 sched_annotate_sleep();
1701 remove_wait_queue(sk_sleep(sk
), &wait
);
1704 if (!skb_queue_empty(&sk
->sk_receive_queue
))
1709 err
= sock_intr_errno(timeo
);
1710 if (signal_pending(current
))
1713 err
= sock_error(sk
);
1722 * tipc_recvmsg - receive packet-oriented message
1723 * @m: descriptor for message info
1724 * @buflen: length of user buffer area
1725 * @flags: receive flags
1727 * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages.
1728 * If the complete message doesn't fit in user area, truncate it.
1730 * Returns size of returned message data, errno otherwise
1732 static int tipc_recvmsg(struct socket
*sock
, struct msghdr
*m
,
1733 size_t buflen
, int flags
)
1735 struct sock
*sk
= sock
->sk
;
1736 bool connected
= !tipc_sk_type_connectionless(sk
);
1737 struct tipc_sock
*tsk
= tipc_sk(sk
);
1738 int rc
, err
, hlen
, dlen
, copy
;
1739 struct sk_buff_head xmitq
;
1740 struct tipc_msg
*hdr
;
1741 struct sk_buff
*skb
;
1745 /* Catch invalid receive requests */
1746 if (unlikely(!buflen
))
1750 if (unlikely(connected
&& sk
->sk_state
== TIPC_OPEN
)) {
1754 timeout
= sock_rcvtimeo(sk
, flags
& MSG_DONTWAIT
);
1756 /* Step rcv queue to first msg with data or error; wait if necessary */
1758 rc
= tipc_wait_for_rcvmsg(sock
, &timeout
);
1761 skb
= skb_peek(&sk
->sk_receive_queue
);
1763 dlen
= msg_data_sz(hdr
);
1764 hlen
= msg_hdr_sz(hdr
);
1765 err
= msg_errcode(hdr
);
1766 grp_evt
= msg_is_grp_evt(hdr
);
1767 if (likely(dlen
|| err
))
1769 tsk_advance_rx_queue(sk
);
1772 /* Collect msg meta data, including error code and rejected data */
1773 tipc_sk_set_orig_addr(m
, skb
);
1774 rc
= tipc_sk_anc_data_recv(m
, skb
, tsk
);
1779 /* Capture data if non-error msg, otherwise just set return value */
1781 copy
= min_t(int, dlen
, buflen
);
1782 if (unlikely(copy
!= dlen
))
1783 m
->msg_flags
|= MSG_TRUNC
;
1784 rc
= skb_copy_datagram_msg(skb
, hlen
, m
, copy
);
1788 if (err
!= TIPC_CONN_SHUTDOWN
&& connected
&& !m
->msg_control
)
1794 /* Mark message as group event if applicable */
1795 if (unlikely(grp_evt
)) {
1796 if (msg_grp_evt(hdr
) == TIPC_WITHDRAWN
)
1797 m
->msg_flags
|= MSG_EOR
;
1798 m
->msg_flags
|= MSG_OOB
;
1802 /* Caption of data or error code/rejected data was successful */
1803 if (unlikely(flags
& MSG_PEEK
))
1806 /* Send group flow control advertisement when applicable */
1807 if (tsk
->group
&& msg_in_group(hdr
) && !grp_evt
) {
1808 __skb_queue_head_init(&xmitq
);
1809 tipc_group_update_rcv_win(tsk
->group
, tsk_blocks(hlen
+ dlen
),
1810 msg_orignode(hdr
), msg_origport(hdr
),
1812 tipc_node_distr_xmit(sock_net(sk
), &xmitq
);
1815 tsk_advance_rx_queue(sk
);
1817 if (likely(!connected
))
1820 /* Send connection flow control advertisement when applicable */
1821 tsk
->rcv_unacked
+= tsk_inc(tsk
, hlen
+ dlen
);
1822 if (tsk
->rcv_unacked
>= tsk
->rcv_win
/ TIPC_ACK_RATE
)
1823 tipc_sk_send_ack(tsk
);
1826 return rc
? rc
: copy
;
1830 * tipc_recvstream - receive stream-oriented data
1831 * @m: descriptor for message info
1832 * @buflen: total size of user buffer area
1833 * @flags: receive flags
1835 * Used for SOCK_STREAM messages only. If not enough data is available
1836 * will optionally wait for more; never truncates data.
1838 * Returns size of returned message data, errno otherwise
1840 static int tipc_recvstream(struct socket
*sock
, struct msghdr
*m
,
1841 size_t buflen
, int flags
)
1843 struct sock
*sk
= sock
->sk
;
1844 struct tipc_sock
*tsk
= tipc_sk(sk
);
1845 struct sk_buff
*skb
;
1846 struct tipc_msg
*hdr
;
1847 struct tipc_skb_cb
*skb_cb
;
1848 bool peek
= flags
& MSG_PEEK
;
1849 int offset
, required
, copy
, copied
= 0;
1850 int hlen
, dlen
, err
, rc
;
1853 /* Catch invalid receive attempts */
1854 if (unlikely(!buflen
))
1859 if (unlikely(sk
->sk_state
== TIPC_OPEN
)) {
1863 required
= sock_rcvlowat(sk
, flags
& MSG_WAITALL
, buflen
);
1864 timeout
= sock_rcvtimeo(sk
, flags
& MSG_DONTWAIT
);
1867 /* Look at first msg in receive queue; wait if necessary */
1868 rc
= tipc_wait_for_rcvmsg(sock
, &timeout
);
1871 skb
= skb_peek(&sk
->sk_receive_queue
);
1872 skb_cb
= TIPC_SKB_CB(skb
);
1874 dlen
= msg_data_sz(hdr
);
1875 hlen
= msg_hdr_sz(hdr
);
1876 err
= msg_errcode(hdr
);
1878 /* Discard any empty non-errored (SYN-) message */
1879 if (unlikely(!dlen
&& !err
)) {
1880 tsk_advance_rx_queue(sk
);
1884 /* Collect msg meta data, incl. error code and rejected data */
1886 tipc_sk_set_orig_addr(m
, skb
);
1887 rc
= tipc_sk_anc_data_recv(m
, skb
, tsk
);
1893 /* Copy data if msg ok, otherwise return error/partial data */
1895 offset
= skb_cb
->bytes_read
;
1896 copy
= min_t(int, dlen
- offset
, buflen
- copied
);
1897 rc
= skb_copy_datagram_msg(skb
, hlen
+ offset
, m
, copy
);
1902 if (unlikely(offset
< dlen
)) {
1904 skb_cb
->bytes_read
= offset
;
1909 if ((err
!= TIPC_CONN_SHUTDOWN
) && !m
->msg_control
)
1918 tsk_advance_rx_queue(sk
);
1920 /* Send connection flow control advertisement when applicable */
1921 tsk
->rcv_unacked
+= tsk_inc(tsk
, hlen
+ dlen
);
1922 if (unlikely(tsk
->rcv_unacked
>= tsk
->rcv_win
/ TIPC_ACK_RATE
))
1923 tipc_sk_send_ack(tsk
);
1925 /* Exit if all requested data or FIN/error received */
1926 if (copied
== buflen
|| err
)
1929 } while (!skb_queue_empty(&sk
->sk_receive_queue
) || copied
< required
);
1932 return copied
? copied
: rc
;
1936 * tipc_write_space - wake up thread if port congestion is released
1939 static void tipc_write_space(struct sock
*sk
)
1941 struct socket_wq
*wq
;
1944 wq
= rcu_dereference(sk
->sk_wq
);
1945 if (skwq_has_sleeper(wq
))
1946 wake_up_interruptible_sync_poll(&wq
->wait
, EPOLLOUT
|
1947 EPOLLWRNORM
| EPOLLWRBAND
);
1952 * tipc_data_ready - wake up threads to indicate messages have been received
1954 * @len: the length of messages
1956 static void tipc_data_ready(struct sock
*sk
)
1958 struct socket_wq
*wq
;
1961 wq
= rcu_dereference(sk
->sk_wq
);
1962 if (skwq_has_sleeper(wq
))
1963 wake_up_interruptible_sync_poll(&wq
->wait
, EPOLLIN
|
1964 EPOLLRDNORM
| EPOLLRDBAND
);
1968 static void tipc_sock_destruct(struct sock
*sk
)
1970 __skb_queue_purge(&sk
->sk_receive_queue
);
1973 static void tipc_sk_proto_rcv(struct sock
*sk
,
1974 struct sk_buff_head
*inputq
,
1975 struct sk_buff_head
*xmitq
)
1977 struct sk_buff
*skb
= __skb_dequeue(inputq
);
1978 struct tipc_sock
*tsk
= tipc_sk(sk
);
1979 struct tipc_msg
*hdr
= buf_msg(skb
);
1980 struct tipc_group
*grp
= tsk
->group
;
1981 bool wakeup
= false;
1983 switch (msg_user(hdr
)) {
1985 tipc_sk_conn_proto_rcv(tsk
, skb
, inputq
, xmitq
);
1988 tipc_dest_del(&tsk
->cong_links
, msg_orignode(hdr
), 0);
1989 /* coupled with smp_rmb() in tipc_wait_for_cond() */
1991 tsk
->cong_link_cnt
--;
1994 case GROUP_PROTOCOL
:
1995 tipc_group_proto_rcv(grp
, &wakeup
, hdr
, inputq
, xmitq
);
1998 tipc_group_member_evt(tsk
->group
, &wakeup
, &sk
->sk_rcvbuf
,
1999 hdr
, inputq
, xmitq
);
2006 sk
->sk_write_space(sk
);
2012 * tipc_sk_filter_connect - check incoming message for a connection-based socket
2014 * @skb: pointer to message buffer.
2015 * Returns true if message should be added to receive queue, false otherwise
2017 static bool tipc_sk_filter_connect(struct tipc_sock
*tsk
, struct sk_buff
*skb
)
2019 struct sock
*sk
= &tsk
->sk
;
2020 struct net
*net
= sock_net(sk
);
2021 struct tipc_msg
*hdr
= buf_msg(skb
);
2022 bool con_msg
= msg_connected(hdr
);
2023 u32 pport
= tsk_peer_port(tsk
);
2024 u32 pnode
= tsk_peer_node(tsk
);
2025 u32 oport
= msg_origport(hdr
);
2026 u32 onode
= msg_orignode(hdr
);
2027 int err
= msg_errcode(hdr
);
2028 unsigned long delay
;
2030 if (unlikely(msg_mcast(hdr
)))
2033 switch (sk
->sk_state
) {
2034 case TIPC_CONNECTING
:
2036 if (likely(con_msg
)) {
2039 tipc_sk_finish_conn(tsk
, oport
, onode
);
2040 msg_set_importance(&tsk
->phdr
, msg_importance(hdr
));
2041 /* ACK+ message with data is added to receive queue */
2042 if (msg_data_sz(hdr
))
2044 /* Empty ACK-, - wake up sleeping connect() and drop */
2045 sk
->sk_state_change(sk
);
2046 msg_set_dest_droppable(hdr
, 1);
2049 /* Ignore connectionless message if not from listening socket */
2050 if (oport
!= pport
|| onode
!= pnode
)
2054 if (err
!= TIPC_ERR_OVERLOAD
)
2057 /* Prepare for new setup attempt if we have a SYN clone */
2058 if (skb_queue_empty(&sk
->sk_write_queue
))
2060 get_random_bytes(&delay
, 2);
2061 delay
%= (tsk
->conn_timeout
/ 4);
2062 delay
= msecs_to_jiffies(delay
+ 100);
2063 sk_reset_timer(sk
, &sk
->sk_timer
, jiffies
+ delay
);
2066 case TIPC_DISCONNECTING
:
2069 /* Accept only SYN message */
2070 if (!msg_is_syn(hdr
) &&
2071 tipc_node_get_capabilities(net
, onode
) & TIPC_SYN_BIT
)
2073 if (!con_msg
&& !err
)
2076 case TIPC_ESTABLISHED
:
2077 /* Accept only connection-based messages sent by peer */
2078 if (likely(con_msg
&& !err
&& pport
== oport
&& pnode
== onode
))
2080 if (!tsk_peer_msg(tsk
, hdr
))
2084 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
2085 tipc_node_remove_conn(net
, pnode
, tsk
->portid
);
2086 sk
->sk_state_change(sk
);
2089 pr_err("Unknown sk_state %u\n", sk
->sk_state
);
2091 /* Abort connection setup attempt */
2092 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
2093 sk
->sk_err
= ECONNREFUSED
;
2094 sk
->sk_state_change(sk
);
2099 * rcvbuf_limit - get proper overload limit of socket receive queue
2103 * For connection oriented messages, irrespective of importance,
2104 * default queue limit is 2 MB.
2106 * For connectionless messages, queue limits are based on message
2107 * importance as follows:
2109 * TIPC_LOW_IMPORTANCE (2 MB)
2110 * TIPC_MEDIUM_IMPORTANCE (4 MB)
2111 * TIPC_HIGH_IMPORTANCE (8 MB)
2112 * TIPC_CRITICAL_IMPORTANCE (16 MB)
2114 * Returns overload limit according to corresponding message importance
2116 static unsigned int rcvbuf_limit(struct sock
*sk
, struct sk_buff
*skb
)
2118 struct tipc_sock
*tsk
= tipc_sk(sk
);
2119 struct tipc_msg
*hdr
= buf_msg(skb
);
2121 if (unlikely(msg_in_group(hdr
)))
2122 return sk
->sk_rcvbuf
;
2124 if (unlikely(!msg_connected(hdr
)))
2125 return sk
->sk_rcvbuf
<< msg_importance(hdr
);
2127 if (likely(tsk
->peer_caps
& TIPC_BLOCK_FLOWCTL
))
2128 return sk
->sk_rcvbuf
;
2130 return FLOWCTL_MSG_LIM
;
2134 * tipc_sk_filter_rcv - validate incoming message
2136 * @skb: pointer to message.
2138 * Enqueues message on receive queue if acceptable; optionally handles
2139 * disconnect indication for a connected socket.
2141 * Called with socket lock already taken
2144 static void tipc_sk_filter_rcv(struct sock
*sk
, struct sk_buff
*skb
,
2145 struct sk_buff_head
*xmitq
)
2147 bool sk_conn
= !tipc_sk_type_connectionless(sk
);
2148 struct tipc_sock
*tsk
= tipc_sk(sk
);
2149 struct tipc_group
*grp
= tsk
->group
;
2150 struct tipc_msg
*hdr
= buf_msg(skb
);
2151 struct net
*net
= sock_net(sk
);
2152 struct sk_buff_head inputq
;
2153 int mtyp
= msg_type(hdr
);
2154 int limit
, err
= TIPC_OK
;
2156 trace_tipc_sk_filter_rcv(sk
, skb
, TIPC_DUMP_ALL
, " ");
2157 TIPC_SKB_CB(skb
)->bytes_read
= 0;
2158 __skb_queue_head_init(&inputq
);
2159 __skb_queue_tail(&inputq
, skb
);
2161 if (unlikely(!msg_isdata(hdr
)))
2162 tipc_sk_proto_rcv(sk
, &inputq
, xmitq
);
2165 tipc_group_filter_msg(grp
, &inputq
, xmitq
);
2167 if (unlikely(!grp
) && mtyp
== TIPC_MCAST_MSG
)
2168 tipc_mcast_filter_msg(net
, &tsk
->mc_method
.deferredq
, &inputq
);
2170 /* Validate and add to receive buffer if there is space */
2171 while ((skb
= __skb_dequeue(&inputq
))) {
2173 limit
= rcvbuf_limit(sk
, skb
);
2174 if ((sk_conn
&& !tipc_sk_filter_connect(tsk
, skb
)) ||
2175 (!sk_conn
&& msg_connected(hdr
)) ||
2176 (!grp
&& msg_in_group(hdr
)))
2177 err
= TIPC_ERR_NO_PORT
;
2178 else if (sk_rmem_alloc_get(sk
) + skb
->truesize
>= limit
) {
2179 trace_tipc_sk_dump(sk
, skb
, TIPC_DUMP_ALL
,
2181 atomic_inc(&sk
->sk_drops
);
2182 err
= TIPC_ERR_OVERLOAD
;
2185 if (unlikely(err
)) {
2186 if (tipc_msg_reverse(tipc_own_addr(net
), &skb
, err
)) {
2187 trace_tipc_sk_rej_msg(sk
, skb
, TIPC_DUMP_NONE
,
2189 __skb_queue_tail(xmitq
, skb
);
2194 __skb_queue_tail(&sk
->sk_receive_queue
, skb
);
2195 skb_set_owner_r(skb
, sk
);
2196 trace_tipc_sk_overlimit2(sk
, skb
, TIPC_DUMP_ALL
,
2197 "rcvq >90% allocated!");
2198 sk
->sk_data_ready(sk
);
2203 * tipc_sk_backlog_rcv - handle incoming message from backlog queue
2207 * Caller must hold socket lock
2209 static int tipc_sk_backlog_rcv(struct sock
*sk
, struct sk_buff
*skb
)
2211 unsigned int before
= sk_rmem_alloc_get(sk
);
2212 struct sk_buff_head xmitq
;
2215 __skb_queue_head_init(&xmitq
);
2217 tipc_sk_filter_rcv(sk
, skb
, &xmitq
);
2218 added
= sk_rmem_alloc_get(sk
) - before
;
2219 atomic_add(added
, &tipc_sk(sk
)->dupl_rcvcnt
);
2221 /* Send pending response/rejected messages, if any */
2222 tipc_node_distr_xmit(sock_net(sk
), &xmitq
);
2227 * tipc_sk_enqueue - extract all buffers with destination 'dport' from
2228 * inputq and try adding them to socket or backlog queue
2229 * @inputq: list of incoming buffers with potentially different destinations
2230 * @sk: socket where the buffers should be enqueued
2231 * @dport: port number for the socket
2233 * Caller must hold socket lock
2235 static void tipc_sk_enqueue(struct sk_buff_head
*inputq
, struct sock
*sk
,
2236 u32 dport
, struct sk_buff_head
*xmitq
)
2238 unsigned long time_limit
= jiffies
+ 2;
2239 struct sk_buff
*skb
;
2244 while (skb_queue_len(inputq
)) {
2245 if (unlikely(time_after_eq(jiffies
, time_limit
)))
2248 skb
= tipc_skb_dequeue(inputq
, dport
);
2252 /* Add message directly to receive queue if possible */
2253 if (!sock_owned_by_user(sk
)) {
2254 tipc_sk_filter_rcv(sk
, skb
, xmitq
);
2258 /* Try backlog, compensating for double-counted bytes */
2259 dcnt
= &tipc_sk(sk
)->dupl_rcvcnt
;
2260 if (!sk
->sk_backlog
.len
)
2261 atomic_set(dcnt
, 0);
2262 lim
= rcvbuf_limit(sk
, skb
) + atomic_read(dcnt
);
2263 if (likely(!sk_add_backlog(sk
, skb
, lim
))) {
2264 trace_tipc_sk_overlimit1(sk
, skb
, TIPC_DUMP_ALL
,
2265 "bklg & rcvq >90% allocated!");
2269 trace_tipc_sk_dump(sk
, skb
, TIPC_DUMP_ALL
, "err_overload!");
2270 /* Overload => reject message back to sender */
2271 onode
= tipc_own_addr(sock_net(sk
));
2272 atomic_inc(&sk
->sk_drops
);
2273 if (tipc_msg_reverse(onode
, &skb
, TIPC_ERR_OVERLOAD
)) {
2274 trace_tipc_sk_rej_msg(sk
, skb
, TIPC_DUMP_ALL
,
2276 __skb_queue_tail(xmitq
, skb
);
2283 * tipc_sk_rcv - handle a chain of incoming buffers
2284 * @inputq: buffer list containing the buffers
2285 * Consumes all buffers in list until inputq is empty
2286 * Note: may be called in multiple threads referring to the same queue
2288 void tipc_sk_rcv(struct net
*net
, struct sk_buff_head
*inputq
)
2290 struct sk_buff_head xmitq
;
2291 u32 dnode
, dport
= 0;
2293 struct tipc_sock
*tsk
;
2295 struct sk_buff
*skb
;
2297 __skb_queue_head_init(&xmitq
);
2298 while (skb_queue_len(inputq
)) {
2299 dport
= tipc_skb_peek_port(inputq
, dport
);
2300 tsk
= tipc_sk_lookup(net
, dport
);
2304 if (likely(spin_trylock_bh(&sk
->sk_lock
.slock
))) {
2305 tipc_sk_enqueue(inputq
, sk
, dport
, &xmitq
);
2306 spin_unlock_bh(&sk
->sk_lock
.slock
);
2308 /* Send pending response/rejected messages, if any */
2309 tipc_node_distr_xmit(sock_net(sk
), &xmitq
);
2313 /* No destination socket => dequeue skb if still there */
2314 skb
= tipc_skb_dequeue(inputq
, dport
);
2318 /* Try secondary lookup if unresolved named message */
2319 err
= TIPC_ERR_NO_PORT
;
2320 if (tipc_msg_lookup_dest(net
, skb
, &err
))
2323 /* Prepare for message rejection */
2324 if (!tipc_msg_reverse(tipc_own_addr(net
), &skb
, err
))
2327 trace_tipc_sk_rej_msg(NULL
, skb
, TIPC_DUMP_NONE
, "@sk_rcv!");
2329 dnode
= msg_destnode(buf_msg(skb
));
2330 tipc_node_xmit_skb(net
, skb
, dnode
, dport
);
2334 static int tipc_wait_for_connect(struct socket
*sock
, long *timeo_p
)
2336 DEFINE_WAIT_FUNC(wait
, woken_wake_function
);
2337 struct sock
*sk
= sock
->sk
;
2341 int err
= sock_error(sk
);
2346 if (signal_pending(current
))
2347 return sock_intr_errno(*timeo_p
);
2349 add_wait_queue(sk_sleep(sk
), &wait
);
2350 done
= sk_wait_event(sk
, timeo_p
,
2351 sk
->sk_state
!= TIPC_CONNECTING
, &wait
);
2352 remove_wait_queue(sk_sleep(sk
), &wait
);
2357 static bool tipc_sockaddr_is_sane(struct sockaddr_tipc
*addr
)
2359 if (addr
->family
!= AF_TIPC
)
2361 if (addr
->addrtype
== TIPC_SERVICE_RANGE
)
2362 return (addr
->addr
.nameseq
.lower
<= addr
->addr
.nameseq
.upper
);
2363 return (addr
->addrtype
== TIPC_SERVICE_ADDR
||
2364 addr
->addrtype
== TIPC_SOCKET_ADDR
);
2368 * tipc_connect - establish a connection to another TIPC port
2369 * @sock: socket structure
2370 * @dest: socket address for destination port
2371 * @destlen: size of socket address data structure
2372 * @flags: file-related flags associated with socket
2374 * Returns 0 on success, errno otherwise
2376 static int tipc_connect(struct socket
*sock
, struct sockaddr
*dest
,
2377 int destlen
, int flags
)
2379 struct sock
*sk
= sock
->sk
;
2380 struct tipc_sock
*tsk
= tipc_sk(sk
);
2381 struct sockaddr_tipc
*dst
= (struct sockaddr_tipc
*)dest
;
2382 struct msghdr m
= {NULL
,};
2383 long timeout
= (flags
& O_NONBLOCK
) ? 0 : tsk
->conn_timeout
;
2387 if (destlen
!= sizeof(struct sockaddr_tipc
))
2397 if (dst
->family
== AF_UNSPEC
) {
2398 memset(&tsk
->peer
, 0, sizeof(struct sockaddr_tipc
));
2399 if (!tipc_sk_type_connectionless(sk
))
2403 if (!tipc_sockaddr_is_sane(dst
)) {
2407 /* DGRAM/RDM connect(), just save the destaddr */
2408 if (tipc_sk_type_connectionless(sk
)) {
2409 memcpy(&tsk
->peer
, dest
, destlen
);
2411 } else if (dst
->addrtype
== TIPC_SERVICE_RANGE
) {
2416 previous
= sk
->sk_state
;
2418 switch (sk
->sk_state
) {
2420 /* Send a 'SYN-' to destination */
2422 m
.msg_namelen
= destlen
;
2424 /* If connect is in non-blocking case, set MSG_DONTWAIT to
2425 * indicate send_msg() is never blocked.
2428 m
.msg_flags
= MSG_DONTWAIT
;
2430 res
= __tipc_sendmsg(sock
, &m
, 0);
2431 if ((res
< 0) && (res
!= -EWOULDBLOCK
))
2434 /* Just entered TIPC_CONNECTING state; the only
2435 * difference is that return value in non-blocking
2436 * case is EINPROGRESS, rather than EALREADY.
2440 case TIPC_CONNECTING
:
2442 if (previous
== TIPC_CONNECTING
)
2446 timeout
= msecs_to_jiffies(timeout
);
2447 /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
2448 res
= tipc_wait_for_connect(sock
, &timeout
);
2450 case TIPC_ESTABLISHED
:
2463 * tipc_listen - allow socket to listen for incoming connections
2464 * @sock: socket structure
2467 * Returns 0 on success, errno otherwise
2469 static int tipc_listen(struct socket
*sock
, int len
)
2471 struct sock
*sk
= sock
->sk
;
2475 res
= tipc_set_sk_state(sk
, TIPC_LISTEN
);
2481 static int tipc_wait_for_accept(struct socket
*sock
, long timeo
)
2483 struct sock
*sk
= sock
->sk
;
2487 /* True wake-one mechanism for incoming connections: only
2488 * one process gets woken up, not the 'whole herd'.
2489 * Since we do not 'race & poll' for established sockets
2490 * anymore, the common case will execute the loop only once.
2493 prepare_to_wait_exclusive(sk_sleep(sk
), &wait
,
2494 TASK_INTERRUPTIBLE
);
2495 if (timeo
&& skb_queue_empty(&sk
->sk_receive_queue
)) {
2497 timeo
= schedule_timeout(timeo
);
2501 if (!skb_queue_empty(&sk
->sk_receive_queue
))
2506 err
= sock_intr_errno(timeo
);
2507 if (signal_pending(current
))
2510 finish_wait(sk_sleep(sk
), &wait
);
2515 * tipc_accept - wait for connection request
2516 * @sock: listening socket
2517 * @newsock: new socket that is to be connected
2518 * @flags: file-related flags associated with socket
2520 * Returns 0 on success, errno otherwise
2522 static int tipc_accept(struct socket
*sock
, struct socket
*new_sock
, int flags
,
2525 struct sock
*new_sk
, *sk
= sock
->sk
;
2526 struct sk_buff
*buf
;
2527 struct tipc_sock
*new_tsock
;
2528 struct tipc_msg
*msg
;
2534 if (sk
->sk_state
!= TIPC_LISTEN
) {
2538 timeo
= sock_rcvtimeo(sk
, flags
& O_NONBLOCK
);
2539 res
= tipc_wait_for_accept(sock
, timeo
);
2543 buf
= skb_peek(&sk
->sk_receive_queue
);
2545 res
= tipc_sk_create(sock_net(sock
->sk
), new_sock
, 0, kern
);
2548 security_sk_clone(sock
->sk
, new_sock
->sk
);
2550 new_sk
= new_sock
->sk
;
2551 new_tsock
= tipc_sk(new_sk
);
2554 /* we lock on new_sk; but lockdep sees the lock on sk */
2555 lock_sock_nested(new_sk
, SINGLE_DEPTH_NESTING
);
2558 * Reject any stray messages received by new socket
2559 * before the socket lock was taken (very, very unlikely)
2561 tsk_rej_rx_queue(new_sk
);
2563 /* Connect new socket to it's peer */
2564 tipc_sk_finish_conn(new_tsock
, msg_origport(msg
), msg_orignode(msg
));
2566 tsk_set_importance(new_tsock
, msg_importance(msg
));
2567 if (msg_named(msg
)) {
2568 new_tsock
->conn_type
= msg_nametype(msg
);
2569 new_tsock
->conn_instance
= msg_nameinst(msg
);
2573 * Respond to 'SYN-' by discarding it & returning 'ACK'-.
2574 * Respond to 'SYN+' by queuing it on new socket.
2576 if (!msg_data_sz(msg
)) {
2577 struct msghdr m
= {NULL
,};
2579 tsk_advance_rx_queue(sk
);
2580 __tipc_sendstream(new_sock
, &m
, 0);
2582 __skb_dequeue(&sk
->sk_receive_queue
);
2583 __skb_queue_head(&new_sk
->sk_receive_queue
, buf
);
2584 skb_set_owner_r(buf
, new_sk
);
2586 release_sock(new_sk
);
2593 * tipc_shutdown - shutdown socket connection
2594 * @sock: socket structure
2595 * @how: direction to close (must be SHUT_RDWR)
2597 * Terminates connection (if necessary), then purges socket's receive queue.
2599 * Returns 0 on success, errno otherwise
2601 static int tipc_shutdown(struct socket
*sock
, int how
)
2603 struct sock
*sk
= sock
->sk
;
2606 if (how
!= SHUT_RDWR
)
2611 trace_tipc_sk_shutdown(sk
, NULL
, TIPC_DUMP_ALL
, " ");
2612 __tipc_shutdown(sock
, TIPC_CONN_SHUTDOWN
);
2613 sk
->sk_shutdown
= SEND_SHUTDOWN
;
2615 if (sk
->sk_state
== TIPC_DISCONNECTING
) {
2616 /* Discard any unreceived messages */
2617 __skb_queue_purge(&sk
->sk_receive_queue
);
2619 /* Wake up anyone sleeping in poll */
2620 sk
->sk_state_change(sk
);
2630 static void tipc_sk_check_probing_state(struct sock
*sk
,
2631 struct sk_buff_head
*list
)
2633 struct tipc_sock
*tsk
= tipc_sk(sk
);
2634 u32 pnode
= tsk_peer_node(tsk
);
2635 u32 pport
= tsk_peer_port(tsk
);
2636 u32 self
= tsk_own_node(tsk
);
2637 u32 oport
= tsk
->portid
;
2638 struct sk_buff
*skb
;
2640 if (tsk
->probe_unacked
) {
2641 tipc_set_sk_state(sk
, TIPC_DISCONNECTING
);
2642 sk
->sk_err
= ECONNABORTED
;
2643 tipc_node_remove_conn(sock_net(sk
), pnode
, pport
);
2644 sk
->sk_state_change(sk
);
2647 /* Prepare new probe */
2648 skb
= tipc_msg_create(CONN_MANAGER
, CONN_PROBE
, INT_H_SIZE
, 0,
2649 pnode
, self
, pport
, oport
, TIPC_OK
);
2651 __skb_queue_tail(list
, skb
);
2652 tsk
->probe_unacked
= true;
2653 sk_reset_timer(sk
, &sk
->sk_timer
, jiffies
+ CONN_PROBING_INTV
);
2656 static void tipc_sk_retry_connect(struct sock
*sk
, struct sk_buff_head
*list
)
2658 struct tipc_sock
*tsk
= tipc_sk(sk
);
2660 /* Try again later if dest link is congested */
2661 if (tsk
->cong_link_cnt
) {
2662 sk_reset_timer(sk
, &sk
->sk_timer
, msecs_to_jiffies(100));
2665 /* Prepare SYN for retransmit */
2666 tipc_msg_skb_clone(&sk
->sk_write_queue
, list
);
2669 static void tipc_sk_timeout(struct timer_list
*t
)
2671 struct sock
*sk
= from_timer(sk
, t
, sk_timer
);
2672 struct tipc_sock
*tsk
= tipc_sk(sk
);
2673 u32 pnode
= tsk_peer_node(tsk
);
2674 struct sk_buff_head list
;
2677 __skb_queue_head_init(&list
);
2680 /* Try again later if socket is busy */
2681 if (sock_owned_by_user(sk
)) {
2682 sk_reset_timer(sk
, &sk
->sk_timer
, jiffies
+ HZ
/ 20);
2687 if (sk
->sk_state
== TIPC_ESTABLISHED
)
2688 tipc_sk_check_probing_state(sk
, &list
);
2689 else if (sk
->sk_state
== TIPC_CONNECTING
)
2690 tipc_sk_retry_connect(sk
, &list
);
2694 if (!skb_queue_empty(&list
))
2695 rc
= tipc_node_xmit(sock_net(sk
), &list
, pnode
, tsk
->portid
);
2697 /* SYN messages may cause link congestion */
2698 if (rc
== -ELINKCONG
) {
2699 tipc_dest_push(&tsk
->cong_links
, pnode
, 0);
2700 tsk
->cong_link_cnt
= 1;
2705 static int tipc_sk_publish(struct tipc_sock
*tsk
, uint scope
,
2706 struct tipc_name_seq
const *seq
)
2708 struct sock
*sk
= &tsk
->sk
;
2709 struct net
*net
= sock_net(sk
);
2710 struct publication
*publ
;
2713 if (scope
!= TIPC_NODE_SCOPE
)
2714 scope
= TIPC_CLUSTER_SCOPE
;
2716 if (tipc_sk_connected(sk
))
2718 key
= tsk
->portid
+ tsk
->pub_count
+ 1;
2719 if (key
== tsk
->portid
)
2722 publ
= tipc_nametbl_publish(net
, seq
->type
, seq
->lower
, seq
->upper
,
2723 scope
, tsk
->portid
, key
);
2724 if (unlikely(!publ
))
2727 list_add(&publ
->binding_sock
, &tsk
->publications
);
2733 static int tipc_sk_withdraw(struct tipc_sock
*tsk
, uint scope
,
2734 struct tipc_name_seq
const *seq
)
2736 struct net
*net
= sock_net(&tsk
->sk
);
2737 struct publication
*publ
;
2738 struct publication
*safe
;
2741 if (scope
!= TIPC_NODE_SCOPE
)
2742 scope
= TIPC_CLUSTER_SCOPE
;
2744 list_for_each_entry_safe(publ
, safe
, &tsk
->publications
, binding_sock
) {
2746 if (publ
->scope
!= scope
)
2748 if (publ
->type
!= seq
->type
)
2750 if (publ
->lower
!= seq
->lower
)
2752 if (publ
->upper
!= seq
->upper
)
2754 tipc_nametbl_withdraw(net
, publ
->type
, publ
->lower
,
2755 publ
->upper
, publ
->key
);
2759 tipc_nametbl_withdraw(net
, publ
->type
, publ
->lower
,
2760 publ
->upper
, publ
->key
);
2763 if (list_empty(&tsk
->publications
))
2768 /* tipc_sk_reinit: set non-zero address in all existing sockets
2769 * when we go from standalone to network mode.
2771 void tipc_sk_reinit(struct net
*net
)
2773 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2774 struct rhashtable_iter iter
;
2775 struct tipc_sock
*tsk
;
2776 struct tipc_msg
*msg
;
2778 rhashtable_walk_enter(&tn
->sk_rht
, &iter
);
2781 rhashtable_walk_start(&iter
);
2783 while ((tsk
= rhashtable_walk_next(&iter
)) && !IS_ERR(tsk
)) {
2784 sock_hold(&tsk
->sk
);
2785 rhashtable_walk_stop(&iter
);
2786 lock_sock(&tsk
->sk
);
2788 msg_set_prevnode(msg
, tipc_own_addr(net
));
2789 msg_set_orignode(msg
, tipc_own_addr(net
));
2790 release_sock(&tsk
->sk
);
2791 rhashtable_walk_start(&iter
);
2795 rhashtable_walk_stop(&iter
);
2796 } while (tsk
== ERR_PTR(-EAGAIN
));
2798 rhashtable_walk_exit(&iter
);
2801 static struct tipc_sock
*tipc_sk_lookup(struct net
*net
, u32 portid
)
2803 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2804 struct tipc_sock
*tsk
;
2807 tsk
= rhashtable_lookup_fast(&tn
->sk_rht
, &portid
, tsk_rht_params
);
2809 sock_hold(&tsk
->sk
);
2815 static int tipc_sk_insert(struct tipc_sock
*tsk
)
2817 struct sock
*sk
= &tsk
->sk
;
2818 struct net
*net
= sock_net(sk
);
2819 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2820 u32 remaining
= (TIPC_MAX_PORT
- TIPC_MIN_PORT
) + 1;
2821 u32 portid
= prandom_u32() % remaining
+ TIPC_MIN_PORT
;
2823 while (remaining
--) {
2825 if ((portid
< TIPC_MIN_PORT
) || (portid
> TIPC_MAX_PORT
))
2826 portid
= TIPC_MIN_PORT
;
2827 tsk
->portid
= portid
;
2828 sock_hold(&tsk
->sk
);
2829 if (!rhashtable_lookup_insert_fast(&tn
->sk_rht
, &tsk
->node
,
2838 static void tipc_sk_remove(struct tipc_sock
*tsk
)
2840 struct sock
*sk
= &tsk
->sk
;
2841 struct tipc_net
*tn
= net_generic(sock_net(sk
), tipc_net_id
);
2843 if (!rhashtable_remove_fast(&tn
->sk_rht
, &tsk
->node
, tsk_rht_params
)) {
2844 WARN_ON(refcount_read(&sk
->sk_refcnt
) == 1);
2849 static const struct rhashtable_params tsk_rht_params
= {
2851 .head_offset
= offsetof(struct tipc_sock
, node
),
2852 .key_offset
= offsetof(struct tipc_sock
, portid
),
2853 .key_len
= sizeof(u32
), /* portid */
2854 .max_size
= 1048576,
2856 .automatic_shrinking
= true,
2859 int tipc_sk_rht_init(struct net
*net
)
2861 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2863 return rhashtable_init(&tn
->sk_rht
, &tsk_rht_params
);
2866 void tipc_sk_rht_destroy(struct net
*net
)
2868 struct tipc_net
*tn
= net_generic(net
, tipc_net_id
);
2870 /* Wait for socket readers to complete */
2873 rhashtable_destroy(&tn
->sk_rht
);
2876 static int tipc_sk_join(struct tipc_sock
*tsk
, struct tipc_group_req
*mreq
)
2878 struct net
*net
= sock_net(&tsk
->sk
);
2879 struct tipc_group
*grp
= tsk
->group
;
2880 struct tipc_msg
*hdr
= &tsk
->phdr
;
2881 struct tipc_name_seq seq
;
2884 if (mreq
->type
< TIPC_RESERVED_TYPES
)
2886 if (mreq
->scope
> TIPC_NODE_SCOPE
)
2890 grp
= tipc_group_create(net
, tsk
->portid
, mreq
, &tsk
->group_is_open
);
2894 msg_set_lookup_scope(hdr
, mreq
->scope
);
2895 msg_set_nametype(hdr
, mreq
->type
);
2896 msg_set_dest_droppable(hdr
, true);
2897 seq
.type
= mreq
->type
;
2898 seq
.lower
= mreq
->instance
;
2899 seq
.upper
= seq
.lower
;
2900 tipc_nametbl_build_group(net
, grp
, mreq
->type
, mreq
->scope
);
2901 rc
= tipc_sk_publish(tsk
, mreq
->scope
, &seq
);
2903 tipc_group_delete(net
, grp
);
2907 /* Eliminate any risk that a broadcast overtakes sent JOINs */
2908 tsk
->mc_method
.rcast
= true;
2909 tsk
->mc_method
.mandatory
= true;
2910 tipc_group_join(net
, grp
, &tsk
->sk
.sk_rcvbuf
);
2914 static int tipc_sk_leave(struct tipc_sock
*tsk
)
2916 struct net
*net
= sock_net(&tsk
->sk
);
2917 struct tipc_group
*grp
= tsk
->group
;
2918 struct tipc_name_seq seq
;
2923 tipc_group_self(grp
, &seq
, &scope
);
2924 tipc_group_delete(net
, grp
);
2926 tipc_sk_withdraw(tsk
, scope
, &seq
);
2931 * tipc_setsockopt - set socket option
2932 * @sock: socket structure
2933 * @lvl: option level
2934 * @opt: option identifier
2935 * @ov: pointer to new option value
2936 * @ol: length of option value
2938 * For stream sockets only, accepts and ignores all IPPROTO_TCP options
2939 * (to ease compatibility).
2941 * Returns 0 on success, errno otherwise
2943 static int tipc_setsockopt(struct socket
*sock
, int lvl
, int opt
,
2944 char __user
*ov
, unsigned int ol
)
2946 struct sock
*sk
= sock
->sk
;
2947 struct tipc_sock
*tsk
= tipc_sk(sk
);
2948 struct tipc_group_req mreq
;
2952 if ((lvl
== IPPROTO_TCP
) && (sock
->type
== SOCK_STREAM
))
2954 if (lvl
!= SOL_TIPC
)
2955 return -ENOPROTOOPT
;
2958 case TIPC_IMPORTANCE
:
2959 case TIPC_SRC_DROPPABLE
:
2960 case TIPC_DEST_DROPPABLE
:
2961 case TIPC_CONN_TIMEOUT
:
2962 if (ol
< sizeof(value
))
2964 if (get_user(value
, (u32 __user
*)ov
))
2967 case TIPC_GROUP_JOIN
:
2968 if (ol
< sizeof(mreq
))
2970 if (copy_from_user(&mreq
, ov
, sizeof(mreq
)))
2981 case TIPC_IMPORTANCE
:
2982 res
= tsk_set_importance(tsk
, value
);
2984 case TIPC_SRC_DROPPABLE
:
2985 if (sock
->type
!= SOCK_STREAM
)
2986 tsk_set_unreliable(tsk
, value
);
2990 case TIPC_DEST_DROPPABLE
:
2991 tsk_set_unreturnable(tsk
, value
);
2993 case TIPC_CONN_TIMEOUT
:
2994 tipc_sk(sk
)->conn_timeout
= value
;
2996 case TIPC_MCAST_BROADCAST
:
2997 tsk
->mc_method
.rcast
= false;
2998 tsk
->mc_method
.mandatory
= true;
3000 case TIPC_MCAST_REPLICAST
:
3001 tsk
->mc_method
.rcast
= true;
3002 tsk
->mc_method
.mandatory
= true;
3004 case TIPC_GROUP_JOIN
:
3005 res
= tipc_sk_join(tsk
, &mreq
);
3007 case TIPC_GROUP_LEAVE
:
3008 res
= tipc_sk_leave(tsk
);
3020 * tipc_getsockopt - get socket option
3021 * @sock: socket structure
3022 * @lvl: option level
3023 * @opt: option identifier
3024 * @ov: receptacle for option value
3025 * @ol: receptacle for length of option value
3027 * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
3028 * (to ease compatibility).
3030 * Returns 0 on success, errno otherwise
3032 static int tipc_getsockopt(struct socket
*sock
, int lvl
, int opt
,
3033 char __user
*ov
, int __user
*ol
)
3035 struct sock
*sk
= sock
->sk
;
3036 struct tipc_sock
*tsk
= tipc_sk(sk
);
3037 struct tipc_name_seq seq
;
3042 if ((lvl
== IPPROTO_TCP
) && (sock
->type
== SOCK_STREAM
))
3043 return put_user(0, ol
);
3044 if (lvl
!= SOL_TIPC
)
3045 return -ENOPROTOOPT
;
3046 res
= get_user(len
, ol
);
3053 case TIPC_IMPORTANCE
:
3054 value
= tsk_importance(tsk
);
3056 case TIPC_SRC_DROPPABLE
:
3057 value
= tsk_unreliable(tsk
);
3059 case TIPC_DEST_DROPPABLE
:
3060 value
= tsk_unreturnable(tsk
);
3062 case TIPC_CONN_TIMEOUT
:
3063 value
= tsk
->conn_timeout
;
3064 /* no need to set "res", since already 0 at this point */
3066 case TIPC_NODE_RECVQ_DEPTH
:
3067 value
= 0; /* was tipc_queue_size, now obsolete */
3069 case TIPC_SOCK_RECVQ_DEPTH
:
3070 value
= skb_queue_len(&sk
->sk_receive_queue
);
3072 case TIPC_SOCK_RECVQ_USED
:
3073 value
= sk_rmem_alloc_get(sk
);
3075 case TIPC_GROUP_JOIN
:
3078 tipc_group_self(tsk
->group
, &seq
, &scope
);
3088 return res
; /* "get" failed */
3090 if (len
< sizeof(value
))
3093 if (copy_to_user(ov
, &value
, sizeof(value
)))
3096 return put_user(sizeof(value
), ol
);
3099 static int tipc_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
3101 struct net
*net
= sock_net(sock
->sk
);
3102 struct tipc_sioc_nodeid_req nr
= {0};
3103 struct tipc_sioc_ln_req lnr
;
3104 void __user
*argp
= (void __user
*)arg
;
3107 case SIOCGETLINKNAME
:
3108 if (copy_from_user(&lnr
, argp
, sizeof(lnr
)))
3110 if (!tipc_node_get_linkname(net
,
3111 lnr
.bearer_id
& 0xffff, lnr
.peer
,
3112 lnr
.linkname
, TIPC_MAX_LINK_NAME
)) {
3113 if (copy_to_user(argp
, &lnr
, sizeof(lnr
)))
3117 return -EADDRNOTAVAIL
;
3119 if (copy_from_user(&nr
, argp
, sizeof(nr
)))
3121 if (!tipc_node_get_id(net
, nr
.peer
, nr
.node_id
))
3122 return -EADDRNOTAVAIL
;
3123 if (copy_to_user(argp
, &nr
, sizeof(nr
)))
3127 return -ENOIOCTLCMD
;
3131 static int tipc_socketpair(struct socket
*sock1
, struct socket
*sock2
)
3133 struct tipc_sock
*tsk2
= tipc_sk(sock2
->sk
);
3134 struct tipc_sock
*tsk1
= tipc_sk(sock1
->sk
);
3135 u32 onode
= tipc_own_addr(sock_net(sock1
->sk
));
3137 tsk1
->peer
.family
= AF_TIPC
;
3138 tsk1
->peer
.addrtype
= TIPC_ADDR_ID
;
3139 tsk1
->peer
.scope
= TIPC_NODE_SCOPE
;
3140 tsk1
->peer
.addr
.id
.ref
= tsk2
->portid
;
3141 tsk1
->peer
.addr
.id
.node
= onode
;
3142 tsk2
->peer
.family
= AF_TIPC
;
3143 tsk2
->peer
.addrtype
= TIPC_ADDR_ID
;
3144 tsk2
->peer
.scope
= TIPC_NODE_SCOPE
;
3145 tsk2
->peer
.addr
.id
.ref
= tsk1
->portid
;
3146 tsk2
->peer
.addr
.id
.node
= onode
;
3148 tipc_sk_finish_conn(tsk1
, tsk2
->portid
, onode
);
3149 tipc_sk_finish_conn(tsk2
, tsk1
->portid
, onode
);
3153 /* Protocol switches for the various types of TIPC sockets */
3155 static const struct proto_ops msg_ops
= {
3156 .owner
= THIS_MODULE
,
3158 .release
= tipc_release
,
3160 .connect
= tipc_connect
,
3161 .socketpair
= tipc_socketpair
,
3162 .accept
= sock_no_accept
,
3163 .getname
= tipc_getname
,
3165 .ioctl
= tipc_ioctl
,
3166 .listen
= sock_no_listen
,
3167 .shutdown
= tipc_shutdown
,
3168 .setsockopt
= tipc_setsockopt
,
3169 .getsockopt
= tipc_getsockopt
,
3170 .sendmsg
= tipc_sendmsg
,
3171 .recvmsg
= tipc_recvmsg
,
3172 .mmap
= sock_no_mmap
,
3173 .sendpage
= sock_no_sendpage
3176 static const struct proto_ops packet_ops
= {
3177 .owner
= THIS_MODULE
,
3179 .release
= tipc_release
,
3181 .connect
= tipc_connect
,
3182 .socketpair
= tipc_socketpair
,
3183 .accept
= tipc_accept
,
3184 .getname
= tipc_getname
,
3186 .ioctl
= tipc_ioctl
,
3187 .listen
= tipc_listen
,
3188 .shutdown
= tipc_shutdown
,
3189 .setsockopt
= tipc_setsockopt
,
3190 .getsockopt
= tipc_getsockopt
,
3191 .sendmsg
= tipc_send_packet
,
3192 .recvmsg
= tipc_recvmsg
,
3193 .mmap
= sock_no_mmap
,
3194 .sendpage
= sock_no_sendpage
3197 static const struct proto_ops stream_ops
= {
3198 .owner
= THIS_MODULE
,
3200 .release
= tipc_release
,
3202 .connect
= tipc_connect
,
3203 .socketpair
= tipc_socketpair
,
3204 .accept
= tipc_accept
,
3205 .getname
= tipc_getname
,
3207 .ioctl
= tipc_ioctl
,
3208 .listen
= tipc_listen
,
3209 .shutdown
= tipc_shutdown
,
3210 .setsockopt
= tipc_setsockopt
,
3211 .getsockopt
= tipc_getsockopt
,
3212 .sendmsg
= tipc_sendstream
,
3213 .recvmsg
= tipc_recvstream
,
3214 .mmap
= sock_no_mmap
,
3215 .sendpage
= sock_no_sendpage
3218 static const struct net_proto_family tipc_family_ops
= {
3219 .owner
= THIS_MODULE
,
3221 .create
= tipc_sk_create
3224 static struct proto tipc_proto
= {
3226 .owner
= THIS_MODULE
,
3227 .obj_size
= sizeof(struct tipc_sock
),
3228 .sysctl_rmem
= sysctl_tipc_rmem
3232 * tipc_socket_init - initialize TIPC socket interface
3234 * Returns 0 on success, errno otherwise
3236 int tipc_socket_init(void)
3240 res
= proto_register(&tipc_proto
, 1);
3242 pr_err("Failed to register TIPC protocol type\n");
3246 res
= sock_register(&tipc_family_ops
);
3248 pr_err("Failed to register TIPC socket type\n");
3249 proto_unregister(&tipc_proto
);
3257 * tipc_socket_stop - stop TIPC socket interface
3259 void tipc_socket_stop(void)
3261 sock_unregister(tipc_family_ops
.family
);
3262 proto_unregister(&tipc_proto
);
3265 /* Caller should hold socket lock for the passed tipc socket. */
3266 static int __tipc_nl_add_sk_con(struct sk_buff
*skb
, struct tipc_sock
*tsk
)
3270 struct nlattr
*nest
;
3272 peer_node
= tsk_peer_node(tsk
);
3273 peer_port
= tsk_peer_port(tsk
);
3275 nest
= nla_nest_start_noflag(skb
, TIPC_NLA_SOCK_CON
);
3279 if (nla_put_u32(skb
, TIPC_NLA_CON_NODE
, peer_node
))
3281 if (nla_put_u32(skb
, TIPC_NLA_CON_SOCK
, peer_port
))
3284 if (tsk
->conn_type
!= 0) {
3285 if (nla_put_flag(skb
, TIPC_NLA_CON_FLAG
))
3287 if (nla_put_u32(skb
, TIPC_NLA_CON_TYPE
, tsk
->conn_type
))
3289 if (nla_put_u32(skb
, TIPC_NLA_CON_INST
, tsk
->conn_instance
))
3292 nla_nest_end(skb
, nest
);
3297 nla_nest_cancel(skb
, nest
);
3302 static int __tipc_nl_add_sk_info(struct sk_buff
*skb
, struct tipc_sock
3305 struct net
*net
= sock_net(skb
->sk
);
3306 struct sock
*sk
= &tsk
->sk
;
3308 if (nla_put_u32(skb
, TIPC_NLA_SOCK_REF
, tsk
->portid
) ||
3309 nla_put_u32(skb
, TIPC_NLA_SOCK_ADDR
, tipc_own_addr(net
)))
3312 if (tipc_sk_connected(sk
)) {
3313 if (__tipc_nl_add_sk_con(skb
, tsk
))
3315 } else if (!list_empty(&tsk
->publications
)) {
3316 if (nla_put_flag(skb
, TIPC_NLA_SOCK_HAS_PUBL
))
3322 /* Caller should hold socket lock for the passed tipc socket. */
3323 static int __tipc_nl_add_sk(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3324 struct tipc_sock
*tsk
)
3326 struct nlattr
*attrs
;
3329 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
3330 &tipc_genl_family
, NLM_F_MULTI
, TIPC_NL_SOCK_GET
);
3334 attrs
= nla_nest_start_noflag(skb
, TIPC_NLA_SOCK
);
3336 goto genlmsg_cancel
;
3338 if (__tipc_nl_add_sk_info(skb
, tsk
))
3339 goto attr_msg_cancel
;
3341 nla_nest_end(skb
, attrs
);
3342 genlmsg_end(skb
, hdr
);
3347 nla_nest_cancel(skb
, attrs
);
3349 genlmsg_cancel(skb
, hdr
);
3354 int tipc_nl_sk_walk(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3355 int (*skb_handler
)(struct sk_buff
*skb
,
3356 struct netlink_callback
*cb
,
3357 struct tipc_sock
*tsk
))
3359 struct rhashtable_iter
*iter
= (void *)cb
->args
[4];
3360 struct tipc_sock
*tsk
;
3363 rhashtable_walk_start(iter
);
3364 while ((tsk
= rhashtable_walk_next(iter
)) != NULL
) {
3367 if (err
== -EAGAIN
) {
3374 sock_hold(&tsk
->sk
);
3375 rhashtable_walk_stop(iter
);
3376 lock_sock(&tsk
->sk
);
3377 err
= skb_handler(skb
, cb
, tsk
);
3379 release_sock(&tsk
->sk
);
3383 release_sock(&tsk
->sk
);
3384 rhashtable_walk_start(iter
);
3387 rhashtable_walk_stop(iter
);
3391 EXPORT_SYMBOL(tipc_nl_sk_walk
);
3393 int tipc_dump_start(struct netlink_callback
*cb
)
3395 return __tipc_dump_start(cb
, sock_net(cb
->skb
->sk
));
3397 EXPORT_SYMBOL(tipc_dump_start
);
3399 int __tipc_dump_start(struct netlink_callback
*cb
, struct net
*net
)
3401 /* tipc_nl_name_table_dump() uses cb->args[0...3]. */
3402 struct rhashtable_iter
*iter
= (void *)cb
->args
[4];
3403 struct tipc_net
*tn
= tipc_net(net
);
3406 iter
= kmalloc(sizeof(*iter
), GFP_KERNEL
);
3410 cb
->args
[4] = (long)iter
;
3413 rhashtable_walk_enter(&tn
->sk_rht
, iter
);
3417 int tipc_dump_done(struct netlink_callback
*cb
)
3419 struct rhashtable_iter
*hti
= (void *)cb
->args
[4];
3421 rhashtable_walk_exit(hti
);
3425 EXPORT_SYMBOL(tipc_dump_done
);
3427 int tipc_sk_fill_sock_diag(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3428 struct tipc_sock
*tsk
, u32 sk_filter_state
,
3429 u64 (*tipc_diag_gen_cookie
)(struct sock
*sk
))
3431 struct sock
*sk
= &tsk
->sk
;
3432 struct nlattr
*attrs
;
3433 struct nlattr
*stat
;
3435 /*filter response w.r.t sk_state*/
3436 if (!(sk_filter_state
& (1 << sk
->sk_state
)))
3439 attrs
= nla_nest_start_noflag(skb
, TIPC_NLA_SOCK
);
3443 if (__tipc_nl_add_sk_info(skb
, tsk
))
3444 goto attr_msg_cancel
;
3446 if (nla_put_u32(skb
, TIPC_NLA_SOCK_TYPE
, (u32
)sk
->sk_type
) ||
3447 nla_put_u32(skb
, TIPC_NLA_SOCK_TIPC_STATE
, (u32
)sk
->sk_state
) ||
3448 nla_put_u32(skb
, TIPC_NLA_SOCK_INO
, sock_i_ino(sk
)) ||
3449 nla_put_u32(skb
, TIPC_NLA_SOCK_UID
,
3450 from_kuid_munged(sk_user_ns(NETLINK_CB(cb
->skb
).sk
),
3452 nla_put_u64_64bit(skb
, TIPC_NLA_SOCK_COOKIE
,
3453 tipc_diag_gen_cookie(sk
),
3455 goto attr_msg_cancel
;
3457 stat
= nla_nest_start_noflag(skb
, TIPC_NLA_SOCK_STAT
);
3459 goto attr_msg_cancel
;
3461 if (nla_put_u32(skb
, TIPC_NLA_SOCK_STAT_RCVQ
,
3462 skb_queue_len(&sk
->sk_receive_queue
)) ||
3463 nla_put_u32(skb
, TIPC_NLA_SOCK_STAT_SENDQ
,
3464 skb_queue_len(&sk
->sk_write_queue
)) ||
3465 nla_put_u32(skb
, TIPC_NLA_SOCK_STAT_DROP
,
3466 atomic_read(&sk
->sk_drops
)))
3467 goto stat_msg_cancel
;
3469 if (tsk
->cong_link_cnt
&&
3470 nla_put_flag(skb
, TIPC_NLA_SOCK_STAT_LINK_CONG
))
3471 goto stat_msg_cancel
;
3473 if (tsk_conn_cong(tsk
) &&
3474 nla_put_flag(skb
, TIPC_NLA_SOCK_STAT_CONN_CONG
))
3475 goto stat_msg_cancel
;
3477 nla_nest_end(skb
, stat
);
3480 if (tipc_group_fill_sock_diag(tsk
->group
, skb
))
3481 goto stat_msg_cancel
;
3483 nla_nest_end(skb
, attrs
);
3488 nla_nest_cancel(skb
, stat
);
3490 nla_nest_cancel(skb
, attrs
);
3494 EXPORT_SYMBOL(tipc_sk_fill_sock_diag
);
3496 int tipc_nl_sk_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3498 return tipc_nl_sk_walk(skb
, cb
, __tipc_nl_add_sk
);
3501 /* Caller should hold socket lock for the passed tipc socket. */
3502 static int __tipc_nl_add_sk_publ(struct sk_buff
*skb
,
3503 struct netlink_callback
*cb
,
3504 struct publication
*publ
)
3507 struct nlattr
*attrs
;
3509 hdr
= genlmsg_put(skb
, NETLINK_CB(cb
->skb
).portid
, cb
->nlh
->nlmsg_seq
,
3510 &tipc_genl_family
, NLM_F_MULTI
, TIPC_NL_PUBL_GET
);
3514 attrs
= nla_nest_start_noflag(skb
, TIPC_NLA_PUBL
);
3516 goto genlmsg_cancel
;
3518 if (nla_put_u32(skb
, TIPC_NLA_PUBL_KEY
, publ
->key
))
3519 goto attr_msg_cancel
;
3520 if (nla_put_u32(skb
, TIPC_NLA_PUBL_TYPE
, publ
->type
))
3521 goto attr_msg_cancel
;
3522 if (nla_put_u32(skb
, TIPC_NLA_PUBL_LOWER
, publ
->lower
))
3523 goto attr_msg_cancel
;
3524 if (nla_put_u32(skb
, TIPC_NLA_PUBL_UPPER
, publ
->upper
))
3525 goto attr_msg_cancel
;
3527 nla_nest_end(skb
, attrs
);
3528 genlmsg_end(skb
, hdr
);
3533 nla_nest_cancel(skb
, attrs
);
3535 genlmsg_cancel(skb
, hdr
);
3540 /* Caller should hold socket lock for the passed tipc socket. */
3541 static int __tipc_nl_list_sk_publ(struct sk_buff
*skb
,
3542 struct netlink_callback
*cb
,
3543 struct tipc_sock
*tsk
, u32
*last_publ
)
3546 struct publication
*p
;
3549 list_for_each_entry(p
, &tsk
->publications
, binding_sock
) {
3550 if (p
->key
== *last_publ
)
3553 if (p
->key
!= *last_publ
) {
3554 /* We never set seq or call nl_dump_check_consistent()
3555 * this means that setting prev_seq here will cause the
3556 * consistence check to fail in the netlink callback
3557 * handler. Resulting in the last NLMSG_DONE message
3558 * having the NLM_F_DUMP_INTR flag set.
3565 p
= list_first_entry(&tsk
->publications
, struct publication
,
3569 list_for_each_entry_from(p
, &tsk
->publications
, binding_sock
) {
3570 err
= __tipc_nl_add_sk_publ(skb
, cb
, p
);
3572 *last_publ
= p
->key
;
3581 int tipc_nl_publ_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3584 u32 tsk_portid
= cb
->args
[0];
3585 u32 last_publ
= cb
->args
[1];
3586 u32 done
= cb
->args
[2];
3587 struct net
*net
= sock_net(skb
->sk
);
3588 struct tipc_sock
*tsk
;
3591 struct nlattr
**attrs
;
3592 struct nlattr
*sock
[TIPC_NLA_SOCK_MAX
+ 1];
3594 err
= tipc_nlmsg_parse(cb
->nlh
, &attrs
);
3598 if (!attrs
[TIPC_NLA_SOCK
])
3601 err
= nla_parse_nested_deprecated(sock
, TIPC_NLA_SOCK_MAX
,
3602 attrs
[TIPC_NLA_SOCK
],
3603 tipc_nl_sock_policy
, NULL
);
3607 if (!sock
[TIPC_NLA_SOCK_REF
])
3610 tsk_portid
= nla_get_u32(sock
[TIPC_NLA_SOCK_REF
]);
3616 tsk
= tipc_sk_lookup(net
, tsk_portid
);
3620 lock_sock(&tsk
->sk
);
3621 err
= __tipc_nl_list_sk_publ(skb
, cb
, tsk
, &last_publ
);
3624 release_sock(&tsk
->sk
);
3627 cb
->args
[0] = tsk_portid
;
3628 cb
->args
[1] = last_publ
;
3635 * tipc_sk_filtering - check if a socket should be traced
3636 * @sk: the socket to be examined
3637 * @sysctl_tipc_sk_filter[]: the socket tuple for filtering,
3638 * (portid, sock type, name type, name lower, name upper)
3640 * Returns true if the socket meets the socket tuple data
3641 * (value 0 = 'any') or when there is no tuple set (all = 0),
3644 bool tipc_sk_filtering(struct sock
*sk
)
3646 struct tipc_sock
*tsk
;
3647 struct publication
*p
;
3648 u32 _port
, _sktype
, _type
, _lower
, _upper
;
3649 u32 type
= 0, lower
= 0, upper
= 0;
3656 _port
= sysctl_tipc_sk_filter
[0];
3657 _sktype
= sysctl_tipc_sk_filter
[1];
3658 _type
= sysctl_tipc_sk_filter
[2];
3659 _lower
= sysctl_tipc_sk_filter
[3];
3660 _upper
= sysctl_tipc_sk_filter
[4];
3662 if (!_port
&& !_sktype
&& !_type
&& !_lower
&& !_upper
)
3666 return (_port
== tsk
->portid
);
3668 if (_sktype
&& _sktype
!= sk
->sk_type
)
3671 if (tsk
->published
) {
3672 p
= list_first_entry_or_null(&tsk
->publications
,
3673 struct publication
, binding_sock
);
3681 if (!tipc_sk_type_connectionless(sk
)) {
3682 type
= tsk
->conn_type
;
3683 lower
= tsk
->conn_instance
;
3684 upper
= tsk
->conn_instance
;
3687 if ((_type
&& _type
!= type
) || (_lower
&& _lower
!= lower
) ||
3688 (_upper
&& _upper
!= upper
))
3694 u32
tipc_sock_get_portid(struct sock
*sk
)
3696 return (sk
) ? (tipc_sk(sk
))->portid
: 0;
3700 * tipc_sk_overlimit1 - check if socket rx queue is about to be overloaded,
3701 * both the rcv and backlog queues are considered
3702 * @sk: tipc sk to be checked
3703 * @skb: tipc msg to be checked
3705 * Returns true if the socket rx queue allocation is > 90%, otherwise false
3708 bool tipc_sk_overlimit1(struct sock
*sk
, struct sk_buff
*skb
)
3710 atomic_t
*dcnt
= &tipc_sk(sk
)->dupl_rcvcnt
;
3711 unsigned int lim
= rcvbuf_limit(sk
, skb
) + atomic_read(dcnt
);
3712 unsigned int qsize
= sk
->sk_backlog
.len
+ sk_rmem_alloc_get(sk
);
3714 return (qsize
> lim
* 90 / 100);
3718 * tipc_sk_overlimit2 - check if socket rx queue is about to be overloaded,
3719 * only the rcv queue is considered
3720 * @sk: tipc sk to be checked
3721 * @skb: tipc msg to be checked
3723 * Returns true if the socket rx queue allocation is > 90%, otherwise false
3726 bool tipc_sk_overlimit2(struct sock
*sk
, struct sk_buff
*skb
)
3728 unsigned int lim
= rcvbuf_limit(sk
, skb
);
3729 unsigned int qsize
= sk_rmem_alloc_get(sk
);
3731 return (qsize
> lim
* 90 / 100);
3735 * tipc_sk_dump - dump TIPC socket
3736 * @sk: tipc sk to be dumped
3737 * @dqueues: bitmask to decide if any socket queue to be dumped?
3738 * - TIPC_DUMP_NONE: don't dump socket queues
3739 * - TIPC_DUMP_SK_SNDQ: dump socket send queue
3740 * - TIPC_DUMP_SK_RCVQ: dump socket rcv queue
3741 * - TIPC_DUMP_SK_BKLGQ: dump socket backlog queue
3742 * - TIPC_DUMP_ALL: dump all the socket queues above
3743 * @buf: returned buffer of dump data in format
3745 int tipc_sk_dump(struct sock
*sk
, u16 dqueues
, char *buf
)
3748 size_t sz
= (dqueues
) ? SK_LMAX
: SK_LMIN
;
3749 struct tipc_sock
*tsk
;
3750 struct publication
*p
;
3754 i
+= scnprintf(buf
, sz
, "sk data: (null)\n");
3759 tsk_connected
= !tipc_sk_type_connectionless(sk
);
3761 i
+= scnprintf(buf
, sz
, "sk data: %u", sk
->sk_type
);
3762 i
+= scnprintf(buf
+ i
, sz
- i
, " %d", sk
->sk_state
);
3763 i
+= scnprintf(buf
+ i
, sz
- i
, " %x", tsk_own_node(tsk
));
3764 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", tsk
->portid
);
3765 i
+= scnprintf(buf
+ i
, sz
- i
, " | %u", tsk_connected
);
3766 if (tsk_connected
) {
3767 i
+= scnprintf(buf
+ i
, sz
- i
, " %x", tsk_peer_node(tsk
));
3768 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", tsk_peer_port(tsk
));
3769 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", tsk
->conn_type
);
3770 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", tsk
->conn_instance
);
3772 i
+= scnprintf(buf
+ i
, sz
- i
, " | %u", tsk
->published
);
3773 if (tsk
->published
) {
3774 p
= list_first_entry_or_null(&tsk
->publications
,
3775 struct publication
, binding_sock
);
3776 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", (p
) ? p
->type
: 0);
3777 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", (p
) ? p
->lower
: 0);
3778 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", (p
) ? p
->upper
: 0);
3780 i
+= scnprintf(buf
+ i
, sz
- i
, " | %u", tsk
->snd_win
);
3781 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", tsk
->rcv_win
);
3782 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", tsk
->max_pkt
);
3783 i
+= scnprintf(buf
+ i
, sz
- i
, " %x", tsk
->peer_caps
);
3784 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", tsk
->cong_link_cnt
);
3785 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", tsk
->snt_unacked
);
3786 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", tsk
->rcv_unacked
);
3787 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", atomic_read(&tsk
->dupl_rcvcnt
));
3788 i
+= scnprintf(buf
+ i
, sz
- i
, " %u", sk
->sk_shutdown
);
3789 i
+= scnprintf(buf
+ i
, sz
- i
, " | %d", sk_wmem_alloc_get(sk
));
3790 i
+= scnprintf(buf
+ i
, sz
- i
, " %d", sk
->sk_sndbuf
);
3791 i
+= scnprintf(buf
+ i
, sz
- i
, " | %d", sk_rmem_alloc_get(sk
));
3792 i
+= scnprintf(buf
+ i
, sz
- i
, " %d", sk
->sk_rcvbuf
);
3793 i
+= scnprintf(buf
+ i
, sz
- i
, " | %d\n", sk
->sk_backlog
.len
);
3795 if (dqueues
& TIPC_DUMP_SK_SNDQ
) {
3796 i
+= scnprintf(buf
+ i
, sz
- i
, "sk_write_queue: ");
3797 i
+= tipc_list_dump(&sk
->sk_write_queue
, false, buf
+ i
);
3800 if (dqueues
& TIPC_DUMP_SK_RCVQ
) {
3801 i
+= scnprintf(buf
+ i
, sz
- i
, "sk_receive_queue: ");
3802 i
+= tipc_list_dump(&sk
->sk_receive_queue
, false, buf
+ i
);
3805 if (dqueues
& TIPC_DUMP_SK_BKLGQ
) {
3806 i
+= scnprintf(buf
+ i
, sz
- i
, "sk_backlog:\n head ");
3807 i
+= tipc_skb_dump(sk
->sk_backlog
.head
, false, buf
+ i
);
3808 if (sk
->sk_backlog
.tail
!= sk
->sk_backlog
.head
) {
3809 i
+= scnprintf(buf
+ i
, sz
- i
, " tail ");
3810 i
+= tipc_skb_dump(sk
->sk_backlog
.tail
, false,