2 * net/tipc/socket.c: TIPC socket API
4 * Copyright (c) 2001-2007, Ericsson AB
5 * Copyright (c) 2004-2008, 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/module.h>
38 #include <linux/types.h>
39 #include <linux/net.h>
40 #include <linux/socket.h>
41 #include <linux/errno.h>
43 #include <linux/poll.h>
44 #include <linux/fcntl.h>
45 #include <linux/gfp.h>
46 #include <asm/string.h>
47 #include <asm/atomic.h>
50 #include <linux/tipc.h>
51 #include <linux/tipc_config.h>
52 #include <net/tipc/tipc_msg.h>
53 #include <net/tipc/tipc_port.h>
57 #define SS_LISTENING -1 /* socket is listening */
58 #define SS_READY -2 /* socket is connectionless */
60 #define OVERLOAD_LIMIT_BASE 5000
61 #define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
66 struct tipc_portid peer_name
;
69 #define tipc_sk(sk) ((struct tipc_sock *)(sk))
70 #define tipc_sk_port(sk) ((struct tipc_port *)(tipc_sk(sk)->p))
72 static int backlog_rcv(struct sock
*sk
, struct sk_buff
*skb
);
73 static u32
dispatch(struct tipc_port
*tport
, struct sk_buff
*buf
);
74 static void wakeupdispatch(struct tipc_port
*tport
);
76 static const struct proto_ops packet_ops
;
77 static const struct proto_ops stream_ops
;
78 static const struct proto_ops msg_ops
;
80 static struct proto tipc_proto
;
82 static int sockets_enabled
= 0;
84 static atomic_t tipc_queue_size
= ATOMIC_INIT(0);
87 * Revised TIPC socket locking policy:
89 * Most socket operations take the standard socket lock when they start
90 * and hold it until they finish (or until they need to sleep). Acquiring
91 * this lock grants the owner exclusive access to the fields of the socket
92 * data structures, with the exception of the backlog queue. A few socket
93 * operations can be done without taking the socket lock because they only
94 * read socket information that never changes during the life of the socket.
96 * Socket operations may acquire the lock for the associated TIPC port if they
97 * need to perform an operation on the port. If any routine needs to acquire
98 * both the socket lock and the port lock it must take the socket lock first
99 * to avoid the risk of deadlock.
101 * The dispatcher handling incoming messages cannot grab the socket lock in
102 * the standard fashion, since invoked it runs at the BH level and cannot block.
103 * Instead, it checks to see if the socket lock is currently owned by someone,
104 * and either handles the message itself or adds it to the socket's backlog
105 * queue; in the latter case the queued message is processed once the process
106 * owning the socket lock releases it.
108 * NOTE: Releasing the socket lock while an operation is sleeping overcomes
109 * the problem of a blocked socket operation preventing any other operations
110 * from occurring. However, applications must be careful if they have
111 * multiple threads trying to send (or receive) on the same socket, as these
112 * operations might interfere with each other. For example, doing a connect
113 * and a receive at the same time might allow the receive to consume the
114 * ACK message meant for the connect. While additional work could be done
115 * to try and overcome this, it doesn't seem to be worthwhile at the present.
117 * NOTE: Releasing the socket lock while an operation is sleeping also ensures
118 * that another operation that must be performed in a non-blocking manner is
119 * not delayed for very long because the lock has already been taken.
121 * NOTE: This code assumes that certain fields of a port/socket pair are
122 * constant over its lifetime; such fields can be examined without taking
123 * the socket lock and/or port lock, and do not need to be re-read even
124 * after resuming processing after waiting. These fields include:
126 * - pointer to socket sk structure (aka tipc_sock structure)
127 * - pointer to port structure
132 * advance_rx_queue - discard first buffer in socket receive queue
134 * Caller must hold socket lock
137 static void advance_rx_queue(struct sock
*sk
)
139 buf_discard(__skb_dequeue(&sk
->sk_receive_queue
));
140 atomic_dec(&tipc_queue_size
);
144 * discard_rx_queue - discard all buffers in socket receive queue
146 * Caller must hold socket lock
149 static void discard_rx_queue(struct sock
*sk
)
153 while ((buf
= __skb_dequeue(&sk
->sk_receive_queue
))) {
154 atomic_dec(&tipc_queue_size
);
160 * reject_rx_queue - reject all buffers in socket receive queue
162 * Caller must hold socket lock
165 static void reject_rx_queue(struct sock
*sk
)
169 while ((buf
= __skb_dequeue(&sk
->sk_receive_queue
))) {
170 tipc_reject_msg(buf
, TIPC_ERR_NO_PORT
);
171 atomic_dec(&tipc_queue_size
);
176 * tipc_create - create a TIPC socket
177 * @net: network namespace (must be default network)
178 * @sock: pre-allocated socket structure
179 * @protocol: protocol indicator (must be 0)
180 * @kern: caused by kernel or by userspace?
182 * This routine creates additional data structures used by the TIPC socket,
183 * initializes them, and links them together.
185 * Returns 0 on success, errno otherwise
188 static int tipc_create(struct net
*net
, struct socket
*sock
, int protocol
,
191 const struct proto_ops
*ops
;
194 struct tipc_port
*tp_ptr
;
196 /* Validate arguments */
198 if (!net_eq(net
, &init_net
))
199 return -EAFNOSUPPORT
;
201 if (unlikely(protocol
!= 0))
202 return -EPROTONOSUPPORT
;
204 switch (sock
->type
) {
207 state
= SS_UNCONNECTED
;
211 state
= SS_UNCONNECTED
;
222 /* Allocate socket's protocol area */
224 sk
= sk_alloc(net
, AF_TIPC
, GFP_KERNEL
, &tipc_proto
);
228 /* Allocate TIPC port for socket to use */
230 tp_ptr
= tipc_createport_raw(sk
, &dispatch
, &wakeupdispatch
,
231 TIPC_LOW_IMPORTANCE
);
232 if (unlikely(!tp_ptr
)) {
237 /* Finish initializing socket data structures */
242 sock_init_data(sock
, sk
);
243 sk
->sk_rcvtimeo
= msecs_to_jiffies(CONN_TIMEOUT_DEFAULT
);
244 sk
->sk_backlog_rcv
= backlog_rcv
;
245 tipc_sk(sk
)->p
= tp_ptr
;
247 spin_unlock_bh(tp_ptr
->lock
);
249 if (sock
->state
== SS_READY
) {
250 tipc_set_portunreturnable(tp_ptr
->ref
, 1);
251 if (sock
->type
== SOCK_DGRAM
)
252 tipc_set_portunreliable(tp_ptr
->ref
, 1);
255 atomic_inc(&tipc_user_count
);
260 * release - destroy a TIPC socket
261 * @sock: socket to destroy
263 * This routine cleans up any messages that are still queued on the socket.
264 * For DGRAM and RDM socket types, all queued messages are rejected.
265 * For SEQPACKET and STREAM socket types, the first message is rejected
266 * and any others are discarded. (If the first message on a STREAM socket
267 * is partially-read, it is discarded and the next one is rejected instead.)
269 * NOTE: Rejected messages are not necessarily returned to the sender! They
270 * are returned or discarded according to the "destination droppable" setting
271 * specified for the message by the sender.
273 * Returns 0 on success, errno otherwise
276 static int release(struct socket
*sock
)
278 struct sock
*sk
= sock
->sk
;
279 struct tipc_port
*tport
;
284 * Exit if socket isn't fully initialized (occurs when a failed accept()
285 * releases a pre-allocated child socket that was never used)
291 tport
= tipc_sk_port(sk
);
295 * Reject all unreceived messages, except on an active connection
296 * (which disconnects locally & sends a 'FIN+' to peer)
299 while (sock
->state
!= SS_DISCONNECTING
) {
300 buf
= __skb_dequeue(&sk
->sk_receive_queue
);
303 atomic_dec(&tipc_queue_size
);
304 if (TIPC_SKB_CB(buf
)->handle
!= msg_data(buf_msg(buf
)))
307 if ((sock
->state
== SS_CONNECTING
) ||
308 (sock
->state
== SS_CONNECTED
)) {
309 sock
->state
= SS_DISCONNECTING
;
310 tipc_disconnect(tport
->ref
);
312 tipc_reject_msg(buf
, TIPC_ERR_NO_PORT
);
317 * Delete TIPC port; this ensures no more messages are queued
318 * (also disconnects an active connection & sends a 'FIN-' to peer)
321 res
= tipc_deleteport(tport
->ref
);
323 /* Discard any remaining (connection-based) messages in receive queue */
325 discard_rx_queue(sk
);
327 /* Reject any messages that accumulated in backlog queue */
329 sock
->state
= SS_DISCONNECTING
;
335 atomic_dec(&tipc_user_count
);
340 * bind - associate or disassocate TIPC name(s) with a socket
341 * @sock: socket structure
342 * @uaddr: socket address describing name(s) and desired operation
343 * @uaddr_len: size of socket address data structure
345 * Name and name sequence binding is indicated using a positive scope value;
346 * a negative scope value unbinds the specified name. Specifying no name
347 * (i.e. a socket address length of 0) unbinds all names from the socket.
349 * Returns 0 on success, errno otherwise
351 * NOTE: This routine doesn't need to take the socket lock since it doesn't
352 * access any non-constant socket information.
355 static int bind(struct socket
*sock
, struct sockaddr
*uaddr
, int uaddr_len
)
357 struct sockaddr_tipc
*addr
= (struct sockaddr_tipc
*)uaddr
;
358 u32 portref
= tipc_sk_port(sock
->sk
)->ref
;
360 if (unlikely(!uaddr_len
))
361 return tipc_withdraw(portref
, 0, NULL
);
363 if (uaddr_len
< sizeof(struct sockaddr_tipc
))
365 if (addr
->family
!= AF_TIPC
)
366 return -EAFNOSUPPORT
;
368 if (addr
->addrtype
== TIPC_ADDR_NAME
)
369 addr
->addr
.nameseq
.upper
= addr
->addr
.nameseq
.lower
;
370 else if (addr
->addrtype
!= TIPC_ADDR_NAMESEQ
)
371 return -EAFNOSUPPORT
;
373 return (addr
->scope
> 0) ?
374 tipc_publish(portref
, addr
->scope
, &addr
->addr
.nameseq
) :
375 tipc_withdraw(portref
, -addr
->scope
, &addr
->addr
.nameseq
);
379 * get_name - get port ID of socket or peer socket
380 * @sock: socket structure
381 * @uaddr: area for returned socket address
382 * @uaddr_len: area for returned length of socket address
383 * @peer: 0 = own ID, 1 = current peer ID, 2 = current/former peer ID
385 * Returns 0 on success, errno otherwise
387 * NOTE: This routine doesn't need to take the socket lock since it only
388 * accesses socket information that is unchanging (or which changes in
389 * a completely predictable manner).
392 static int get_name(struct socket
*sock
, struct sockaddr
*uaddr
,
393 int *uaddr_len
, int peer
)
395 struct sockaddr_tipc
*addr
= (struct sockaddr_tipc
*)uaddr
;
396 struct tipc_sock
*tsock
= tipc_sk(sock
->sk
);
398 memset(addr
, 0, sizeof(*addr
));
400 if ((sock
->state
!= SS_CONNECTED
) &&
401 ((peer
!= 2) || (sock
->state
!= SS_DISCONNECTING
)))
403 addr
->addr
.id
.ref
= tsock
->peer_name
.ref
;
404 addr
->addr
.id
.node
= tsock
->peer_name
.node
;
406 tipc_ownidentity(tsock
->p
->ref
, &addr
->addr
.id
);
409 *uaddr_len
= sizeof(*addr
);
410 addr
->addrtype
= TIPC_ADDR_ID
;
411 addr
->family
= AF_TIPC
;
413 addr
->addr
.name
.domain
= 0;
419 * poll - read and possibly block on pollmask
420 * @file: file structure associated with the socket
421 * @sock: socket for which to calculate the poll bits
424 * Returns pollmask value
427 * It appears that the usual socket locking mechanisms are not useful here
428 * since the pollmask info is potentially out-of-date the moment this routine
429 * exits. TCP and other protocols seem to rely on higher level poll routines
430 * to handle any preventable race conditions, so TIPC will do the same ...
432 * TIPC sets the returned events as follows:
433 * a) POLLRDNORM and POLLIN are set if the socket's receive queue is non-empty
434 * or if a connection-oriented socket is does not have an active connection
435 * (i.e. a read operation will not block).
436 * b) POLLOUT is set except when a socket's connection has been terminated
437 * (i.e. a write operation will not block).
438 * c) POLLHUP is set when a socket's connection has been terminated.
440 * IMPORTANT: The fact that a read or write operation will not block does NOT
441 * imply that the operation will succeed!
444 static unsigned int poll(struct file
*file
, struct socket
*sock
,
447 struct sock
*sk
= sock
->sk
;
450 poll_wait(file
, sk_sleep(sk
), wait
);
452 if (!skb_queue_empty(&sk
->sk_receive_queue
) ||
453 (sock
->state
== SS_UNCONNECTED
) ||
454 (sock
->state
== SS_DISCONNECTING
))
455 mask
= (POLLRDNORM
| POLLIN
);
459 if (sock
->state
== SS_DISCONNECTING
)
468 * dest_name_check - verify user is permitted to send to specified port name
469 * @dest: destination address
470 * @m: descriptor for message to be sent
472 * Prevents restricted configuration commands from being issued by
473 * unauthorized users.
475 * Returns 0 if permission is granted, otherwise errno
478 static int dest_name_check(struct sockaddr_tipc
*dest
, struct msghdr
*m
)
480 struct tipc_cfg_msg_hdr hdr
;
482 if (likely(dest
->addr
.name
.name
.type
>= TIPC_RESERVED_TYPES
))
484 if (likely(dest
->addr
.name
.name
.type
== TIPC_TOP_SRV
))
486 if (likely(dest
->addr
.name
.name
.type
!= TIPC_CFG_SRV
))
489 if (copy_from_user(&hdr
, m
->msg_iov
[0].iov_base
, sizeof(hdr
)))
491 if ((ntohs(hdr
.tcm_type
) & 0xC000) && (!capable(CAP_NET_ADMIN
)))
498 * send_msg - send message in connectionless manner
499 * @iocb: if NULL, indicates that socket lock is already held
500 * @sock: socket structure
501 * @m: message to send
502 * @total_len: length of message
504 * Message must have an destination specified explicitly.
505 * Used for SOCK_RDM and SOCK_DGRAM messages,
506 * and for 'SYN' messages on SOCK_SEQPACKET and SOCK_STREAM connections.
507 * (Note: 'SYN+' is prohibited on SOCK_STREAM.)
509 * Returns the number of bytes sent on success, or errno otherwise
512 static int send_msg(struct kiocb
*iocb
, struct socket
*sock
,
513 struct msghdr
*m
, size_t total_len
)
515 struct sock
*sk
= sock
->sk
;
516 struct tipc_port
*tport
= tipc_sk_port(sk
);
517 struct sockaddr_tipc
*dest
= (struct sockaddr_tipc
*)m
->msg_name
;
522 return -EDESTADDRREQ
;
523 if (unlikely((m
->msg_namelen
< sizeof(*dest
)) ||
524 (dest
->family
!= AF_TIPC
)))
530 needs_conn
= (sock
->state
!= SS_READY
);
531 if (unlikely(needs_conn
)) {
532 if (sock
->state
== SS_LISTENING
) {
536 if (sock
->state
!= SS_UNCONNECTED
) {
540 if ((tport
->published
) ||
541 ((sock
->type
== SOCK_STREAM
) && (total_len
!= 0))) {
545 if (dest
->addrtype
== TIPC_ADDR_NAME
) {
546 tport
->conn_type
= dest
->addr
.name
.name
.type
;
547 tport
->conn_instance
= dest
->addr
.name
.name
.instance
;
550 /* Abort any pending connection attempts (very unlikely) */
556 if (dest
->addrtype
== TIPC_ADDR_NAME
) {
557 if ((res
= dest_name_check(dest
, m
)))
559 res
= tipc_send2name(tport
->ref
,
560 &dest
->addr
.name
.name
,
561 dest
->addr
.name
.domain
,
565 else if (dest
->addrtype
== TIPC_ADDR_ID
) {
566 res
= tipc_send2port(tport
->ref
,
571 else if (dest
->addrtype
== TIPC_ADDR_MCAST
) {
576 if ((res
= dest_name_check(dest
, m
)))
578 res
= tipc_multicast(tport
->ref
,
584 if (likely(res
!= -ELINKCONG
)) {
585 if (needs_conn
&& (res
>= 0)) {
586 sock
->state
= SS_CONNECTING
;
590 if (m
->msg_flags
& MSG_DONTWAIT
) {
595 res
= wait_event_interruptible(*sk_sleep(sk
),
609 * send_packet - send a connection-oriented message
610 * @iocb: if NULL, indicates that socket lock is already held
611 * @sock: socket structure
612 * @m: message to send
613 * @total_len: length of message
615 * Used for SOCK_SEQPACKET messages and SOCK_STREAM data.
617 * Returns the number of bytes sent on success, or errno otherwise
620 static int send_packet(struct kiocb
*iocb
, struct socket
*sock
,
621 struct msghdr
*m
, size_t total_len
)
623 struct sock
*sk
= sock
->sk
;
624 struct tipc_port
*tport
= tipc_sk_port(sk
);
625 struct sockaddr_tipc
*dest
= (struct sockaddr_tipc
*)m
->msg_name
;
628 /* Handle implied connection establishment */
631 return send_msg(iocb
, sock
, m
, total_len
);
637 if (unlikely(sock
->state
!= SS_CONNECTED
)) {
638 if (sock
->state
== SS_DISCONNECTING
)
645 res
= tipc_send(tport
->ref
, m
->msg_iovlen
, m
->msg_iov
);
646 if (likely(res
!= -ELINKCONG
)) {
649 if (m
->msg_flags
& MSG_DONTWAIT
) {
654 res
= wait_event_interruptible(*sk_sleep(sk
),
655 (!tport
->congested
|| !tport
->connected
));
667 * send_stream - send stream-oriented data
669 * @sock: socket structure
671 * @total_len: total length of data to be sent
673 * Used for SOCK_STREAM data.
675 * Returns the number of bytes sent on success (or partial success),
676 * or errno if no data sent
679 static int send_stream(struct kiocb
*iocb
, struct socket
*sock
,
680 struct msghdr
*m
, size_t total_len
)
682 struct sock
*sk
= sock
->sk
;
683 struct tipc_port
*tport
= tipc_sk_port(sk
);
684 struct msghdr my_msg
;
686 struct iovec
*curr_iov
;
688 char __user
*curr_start
;
697 /* Handle special cases where there is no connection */
699 if (unlikely(sock
->state
!= SS_CONNECTED
)) {
700 if (sock
->state
== SS_UNCONNECTED
) {
701 res
= send_packet(NULL
, sock
, m
, total_len
);
703 } else if (sock
->state
== SS_DISCONNECTING
) {
712 if (unlikely(m
->msg_name
)) {
718 * Send each iovec entry using one or more messages
720 * Note: This algorithm is good for the most likely case
721 * (i.e. one large iovec entry), but could be improved to pass sets
722 * of small iovec entries into send_packet().
725 curr_iov
= m
->msg_iov
;
726 curr_iovlen
= m
->msg_iovlen
;
727 my_msg
.msg_iov
= &my_iov
;
728 my_msg
.msg_iovlen
= 1;
729 my_msg
.msg_flags
= m
->msg_flags
;
730 my_msg
.msg_name
= NULL
;
733 hdr_size
= msg_hdr_sz(&tport
->phdr
);
735 while (curr_iovlen
--) {
736 curr_start
= curr_iov
->iov_base
;
737 curr_left
= curr_iov
->iov_len
;
740 bytes_to_send
= tport
->max_pkt
- hdr_size
;
741 if (bytes_to_send
> TIPC_MAX_USER_MSG_SIZE
)
742 bytes_to_send
= TIPC_MAX_USER_MSG_SIZE
;
743 if (curr_left
< bytes_to_send
)
744 bytes_to_send
= curr_left
;
745 my_iov
.iov_base
= curr_start
;
746 my_iov
.iov_len
= bytes_to_send
;
747 if ((res
= send_packet(NULL
, sock
, &my_msg
, 0)) < 0) {
752 curr_left
-= bytes_to_send
;
753 curr_start
+= bytes_to_send
;
754 bytes_sent
+= bytes_to_send
;
766 * auto_connect - complete connection setup to a remote port
767 * @sock: socket structure
768 * @msg: peer's response message
770 * Returns 0 on success, errno otherwise
773 static int auto_connect(struct socket
*sock
, struct tipc_msg
*msg
)
775 struct tipc_sock
*tsock
= tipc_sk(sock
->sk
);
777 if (msg_errcode(msg
)) {
778 sock
->state
= SS_DISCONNECTING
;
779 return -ECONNREFUSED
;
782 tsock
->peer_name
.ref
= msg_origport(msg
);
783 tsock
->peer_name
.node
= msg_orignode(msg
);
784 tipc_connect2port(tsock
->p
->ref
, &tsock
->peer_name
);
785 tipc_set_portimportance(tsock
->p
->ref
, msg_importance(msg
));
786 sock
->state
= SS_CONNECTED
;
791 * set_orig_addr - capture sender's address for received message
792 * @m: descriptor for message info
793 * @msg: received message header
795 * Note: Address is not captured if not requested by receiver.
798 static void set_orig_addr(struct msghdr
*m
, struct tipc_msg
*msg
)
800 struct sockaddr_tipc
*addr
= (struct sockaddr_tipc
*)m
->msg_name
;
803 addr
->family
= AF_TIPC
;
804 addr
->addrtype
= TIPC_ADDR_ID
;
805 addr
->addr
.id
.ref
= msg_origport(msg
);
806 addr
->addr
.id
.node
= msg_orignode(msg
);
807 addr
->addr
.name
.domain
= 0; /* could leave uninitialized */
808 addr
->scope
= 0; /* could leave uninitialized */
809 m
->msg_namelen
= sizeof(struct sockaddr_tipc
);
814 * anc_data_recv - optionally capture ancillary data for received message
815 * @m: descriptor for message info
816 * @msg: received message header
817 * @tport: TIPC port associated with message
819 * Note: Ancillary data is not captured if not requested by receiver.
821 * Returns 0 if successful, otherwise errno
824 static int anc_data_recv(struct msghdr
*m
, struct tipc_msg
*msg
,
825 struct tipc_port
*tport
)
833 if (likely(m
->msg_controllen
== 0))
836 /* Optionally capture errored message object(s) */
838 err
= msg
? msg_errcode(msg
) : 0;
841 anc_data
[1] = msg_data_sz(msg
);
842 if ((res
= put_cmsg(m
, SOL_TIPC
, TIPC_ERRINFO
, 8, anc_data
)))
845 (res
= put_cmsg(m
, SOL_TIPC
, TIPC_RETDATA
, anc_data
[1],
850 /* Optionally capture message destination object */
852 dest_type
= msg
? msg_type(msg
) : TIPC_DIRECT_MSG
;
856 anc_data
[0] = msg_nametype(msg
);
857 anc_data
[1] = msg_namelower(msg
);
858 anc_data
[2] = msg_namelower(msg
);
862 anc_data
[0] = msg_nametype(msg
);
863 anc_data
[1] = msg_namelower(msg
);
864 anc_data
[2] = msg_nameupper(msg
);
867 has_name
= (tport
->conn_type
!= 0);
868 anc_data
[0] = tport
->conn_type
;
869 anc_data
[1] = tport
->conn_instance
;
870 anc_data
[2] = tport
->conn_instance
;
876 (res
= put_cmsg(m
, SOL_TIPC
, TIPC_DESTNAME
, 12, anc_data
)))
883 * recv_msg - receive packet-oriented message
885 * @m: descriptor for message info
886 * @buf_len: total size of user buffer area
887 * @flags: receive flags
889 * Used for SOCK_DGRAM, SOCK_RDM, and SOCK_SEQPACKET messages.
890 * If the complete message doesn't fit in user area, truncate it.
892 * Returns size of returned message data, errno otherwise
895 static int recv_msg(struct kiocb
*iocb
, struct socket
*sock
,
896 struct msghdr
*m
, size_t buf_len
, int flags
)
898 struct sock
*sk
= sock
->sk
;
899 struct tipc_port
*tport
= tipc_sk_port(sk
);
901 struct tipc_msg
*msg
;
906 /* Catch invalid receive requests */
908 if (m
->msg_iovlen
!= 1)
909 return -EOPNOTSUPP
; /* Don't do multiple iovec entries yet */
911 if (unlikely(!buf_len
))
916 if (unlikely(sock
->state
== SS_UNCONNECTED
)) {
923 /* Look for a message in receive queue; wait if necessary */
925 while (skb_queue_empty(&sk
->sk_receive_queue
)) {
926 if (sock
->state
== SS_DISCONNECTING
) {
930 if (flags
& MSG_DONTWAIT
) {
935 res
= wait_event_interruptible(*sk_sleep(sk
),
936 (!skb_queue_empty(&sk
->sk_receive_queue
) ||
937 (sock
->state
== SS_DISCONNECTING
)));
943 /* Look at first message in receive queue */
945 buf
= skb_peek(&sk
->sk_receive_queue
);
947 sz
= msg_data_sz(msg
);
948 err
= msg_errcode(msg
);
950 /* Complete connection setup for an implied connect */
952 if (unlikely(sock
->state
== SS_CONNECTING
)) {
953 res
= auto_connect(sock
, msg
);
958 /* Discard an empty non-errored message & try again */
960 if ((!sz
) && (!err
)) {
961 advance_rx_queue(sk
);
965 /* Capture sender's address (optional) */
967 set_orig_addr(m
, msg
);
969 /* Capture ancillary data (optional) */
971 res
= anc_data_recv(m
, msg
, tport
);
975 /* Capture message data (if valid) & compute return value (always) */
978 if (unlikely(buf_len
< sz
)) {
980 m
->msg_flags
|= MSG_TRUNC
;
982 if (unlikely(copy_to_user(m
->msg_iov
->iov_base
, msg_data(msg
),
989 if ((sock
->state
== SS_READY
) ||
990 ((err
== TIPC_CONN_SHUTDOWN
) || m
->msg_control
))
996 /* Consume received message (optional) */
998 if (likely(!(flags
& MSG_PEEK
))) {
999 if ((sock
->state
!= SS_READY
) &&
1000 (++tport
->conn_unacked
>= TIPC_FLOW_CONTROL_WIN
))
1001 tipc_acknowledge(tport
->ref
, tport
->conn_unacked
);
1002 advance_rx_queue(sk
);
1010 * recv_stream - receive stream-oriented data
1012 * @m: descriptor for message info
1013 * @buf_len: total size of user buffer area
1014 * @flags: receive flags
1016 * Used for SOCK_STREAM messages only. If not enough data is available
1017 * will optionally wait for more; never truncates data.
1019 * Returns size of returned message data, errno otherwise
1022 static int recv_stream(struct kiocb
*iocb
, struct socket
*sock
,
1023 struct msghdr
*m
, size_t buf_len
, int flags
)
1025 struct sock
*sk
= sock
->sk
;
1026 struct tipc_port
*tport
= tipc_sk_port(sk
);
1027 struct sk_buff
*buf
;
1028 struct tipc_msg
*msg
;
1033 char __user
*crs
= m
->msg_iov
->iov_base
;
1034 unsigned char *buf_crs
;
1038 /* Catch invalid receive attempts */
1040 if (m
->msg_iovlen
!= 1)
1041 return -EOPNOTSUPP
; /* Don't do multiple iovec entries yet */
1043 if (unlikely(!buf_len
))
1048 if (unlikely((sock
->state
== SS_UNCONNECTED
) ||
1049 (sock
->state
== SS_CONNECTING
))) {
1056 /* Look for a message in receive queue; wait if necessary */
1058 while (skb_queue_empty(&sk
->sk_receive_queue
)) {
1059 if (sock
->state
== SS_DISCONNECTING
) {
1063 if (flags
& MSG_DONTWAIT
) {
1068 res
= wait_event_interruptible(*sk_sleep(sk
),
1069 (!skb_queue_empty(&sk
->sk_receive_queue
) ||
1070 (sock
->state
== SS_DISCONNECTING
)));
1076 /* Look at first message in receive queue */
1078 buf
= skb_peek(&sk
->sk_receive_queue
);
1080 sz
= msg_data_sz(msg
);
1081 err
= msg_errcode(msg
);
1083 /* Discard an empty non-errored message & try again */
1085 if ((!sz
) && (!err
)) {
1086 advance_rx_queue(sk
);
1090 /* Optionally capture sender's address & ancillary data of first msg */
1092 if (sz_copied
== 0) {
1093 set_orig_addr(m
, msg
);
1094 res
= anc_data_recv(m
, msg
, tport
);
1099 /* Capture message data (if valid) & compute return value (always) */
1102 buf_crs
= (unsigned char *)(TIPC_SKB_CB(buf
)->handle
);
1103 sz
= (unsigned char *)msg
+ msg_size(msg
) - buf_crs
;
1105 needed
= (buf_len
- sz_copied
);
1106 sz_to_copy
= (sz
<= needed
) ? sz
: needed
;
1107 if (unlikely(copy_to_user(crs
, buf_crs
, sz_to_copy
))) {
1111 sz_copied
+= sz_to_copy
;
1113 if (sz_to_copy
< sz
) {
1114 if (!(flags
& MSG_PEEK
))
1115 TIPC_SKB_CB(buf
)->handle
= buf_crs
+ sz_to_copy
;
1122 goto exit
; /* can't add error msg to valid data */
1124 if ((err
== TIPC_CONN_SHUTDOWN
) || m
->msg_control
)
1130 /* Consume received message (optional) */
1132 if (likely(!(flags
& MSG_PEEK
))) {
1133 if (unlikely(++tport
->conn_unacked
>= TIPC_FLOW_CONTROL_WIN
))
1134 tipc_acknowledge(tport
->ref
, tport
->conn_unacked
);
1135 advance_rx_queue(sk
);
1138 /* Loop around if more data is required */
1140 if ((sz_copied
< buf_len
) && /* didn't get all requested data */
1141 (!skb_queue_empty(&sk
->sk_receive_queue
) ||
1142 (flags
& MSG_WAITALL
)) && /* and more is ready or required */
1143 (!(flags
& MSG_PEEK
)) && /* and aren't just peeking at data */
1144 (!err
)) /* and haven't reached a FIN */
1149 return sz_copied
? sz_copied
: res
;
1153 * rx_queue_full - determine if receive queue can accept another message
1154 * @msg: message to be added to queue
1155 * @queue_size: current size of queue
1156 * @base: nominal maximum size of queue
1158 * Returns 1 if queue is unable to accept message, 0 otherwise
1161 static int rx_queue_full(struct tipc_msg
*msg
, u32 queue_size
, u32 base
)
1164 u32 imp
= msg_importance(msg
);
1166 if (imp
== TIPC_LOW_IMPORTANCE
)
1168 else if (imp
== TIPC_MEDIUM_IMPORTANCE
)
1169 threshold
= base
* 2;
1170 else if (imp
== TIPC_HIGH_IMPORTANCE
)
1171 threshold
= base
* 100;
1175 if (msg_connected(msg
))
1178 return (queue_size
>= threshold
);
1182 * filter_rcv - validate incoming message
1186 * Enqueues message on receive queue if acceptable; optionally handles
1187 * disconnect indication for a connected socket.
1189 * Called with socket lock already taken; port lock may also be taken.
1191 * Returns TIPC error status code (TIPC_OK if message is not to be rejected)
1194 static u32
filter_rcv(struct sock
*sk
, struct sk_buff
*buf
)
1196 struct socket
*sock
= sk
->sk_socket
;
1197 struct tipc_msg
*msg
= buf_msg(buf
);
1200 /* Reject message if it is wrong sort of message for socket */
1203 * WOULD IT BE BETTER TO JUST DISCARD THESE MESSAGES INSTEAD?
1204 * "NO PORT" ISN'T REALLY THE RIGHT ERROR CODE, AND THERE MAY
1205 * BE SECURITY IMPLICATIONS INHERENT IN REJECTING INVALID TRAFFIC
1208 if (sock
->state
== SS_READY
) {
1209 if (msg_connected(msg
)) {
1210 msg_dbg(msg
, "dispatch filter 1\n");
1211 return TIPC_ERR_NO_PORT
;
1214 if (msg_mcast(msg
)) {
1215 msg_dbg(msg
, "dispatch filter 2\n");
1216 return TIPC_ERR_NO_PORT
;
1218 if (sock
->state
== SS_CONNECTED
) {
1219 if (!msg_connected(msg
)) {
1220 msg_dbg(msg
, "dispatch filter 3\n");
1221 return TIPC_ERR_NO_PORT
;
1224 else if (sock
->state
== SS_CONNECTING
) {
1225 if (!msg_connected(msg
) && (msg_errcode(msg
) == 0)) {
1226 msg_dbg(msg
, "dispatch filter 4\n");
1227 return TIPC_ERR_NO_PORT
;
1230 else if (sock
->state
== SS_LISTENING
) {
1231 if (msg_connected(msg
) || msg_errcode(msg
)) {
1232 msg_dbg(msg
, "dispatch filter 5\n");
1233 return TIPC_ERR_NO_PORT
;
1236 else if (sock
->state
== SS_DISCONNECTING
) {
1237 msg_dbg(msg
, "dispatch filter 6\n");
1238 return TIPC_ERR_NO_PORT
;
1240 else /* (sock->state == SS_UNCONNECTED) */ {
1241 if (msg_connected(msg
) || msg_errcode(msg
)) {
1242 msg_dbg(msg
, "dispatch filter 7\n");
1243 return TIPC_ERR_NO_PORT
;
1248 /* Reject message if there isn't room to queue it */
1250 recv_q_len
= (u32
)atomic_read(&tipc_queue_size
);
1251 if (unlikely(recv_q_len
>= OVERLOAD_LIMIT_BASE
)) {
1252 if (rx_queue_full(msg
, recv_q_len
, OVERLOAD_LIMIT_BASE
))
1253 return TIPC_ERR_OVERLOAD
;
1255 recv_q_len
= skb_queue_len(&sk
->sk_receive_queue
);
1256 if (unlikely(recv_q_len
>= (OVERLOAD_LIMIT_BASE
/ 2))) {
1257 if (rx_queue_full(msg
, recv_q_len
, OVERLOAD_LIMIT_BASE
/ 2))
1258 return TIPC_ERR_OVERLOAD
;
1261 /* Enqueue message (finally!) */
1263 msg_dbg(msg
, "<DISP<: ");
1264 TIPC_SKB_CB(buf
)->handle
= msg_data(msg
);
1265 atomic_inc(&tipc_queue_size
);
1266 __skb_queue_tail(&sk
->sk_receive_queue
, buf
);
1268 /* Initiate connection termination for an incoming 'FIN' */
1270 if (unlikely(msg_errcode(msg
) && (sock
->state
== SS_CONNECTED
))) {
1271 sock
->state
= SS_DISCONNECTING
;
1272 tipc_disconnect_port(tipc_sk_port(sk
));
1275 if (waitqueue_active(sk_sleep(sk
)))
1276 wake_up_interruptible(sk_sleep(sk
));
1281 * backlog_rcv - handle incoming message from backlog queue
1285 * Caller must hold socket lock, but not port lock.
1290 static int backlog_rcv(struct sock
*sk
, struct sk_buff
*buf
)
1294 res
= filter_rcv(sk
, buf
);
1296 tipc_reject_msg(buf
, res
);
1301 * dispatch - handle incoming message
1302 * @tport: TIPC port that received message
1305 * Called with port lock already taken.
1307 * Returns TIPC error status code (TIPC_OK if message is not to be rejected)
1310 static u32
dispatch(struct tipc_port
*tport
, struct sk_buff
*buf
)
1312 struct sock
*sk
= (struct sock
*)tport
->usr_handle
;
1316 * Process message if socket is unlocked; otherwise add to backlog queue
1318 * This code is based on sk_receive_skb(), but must be distinct from it
1319 * since a TIPC-specific filter/reject mechanism is utilized
1323 if (!sock_owned_by_user(sk
)) {
1324 res
= filter_rcv(sk
, buf
);
1326 if (sk_add_backlog(sk
, buf
))
1327 res
= TIPC_ERR_OVERLOAD
;
1337 * wakeupdispatch - wake up port after congestion
1338 * @tport: port to wakeup
1340 * Called with port lock already taken.
1343 static void wakeupdispatch(struct tipc_port
*tport
)
1345 struct sock
*sk
= (struct sock
*)tport
->usr_handle
;
1347 if (waitqueue_active(sk_sleep(sk
)))
1348 wake_up_interruptible(sk_sleep(sk
));
1352 * connect - establish a connection to another TIPC port
1353 * @sock: socket structure
1354 * @dest: socket address for destination port
1355 * @destlen: size of socket address data structure
1356 * @flags: file-related flags associated with socket
1358 * Returns 0 on success, errno otherwise
1361 static int connect(struct socket
*sock
, struct sockaddr
*dest
, int destlen
,
1364 struct sock
*sk
= sock
->sk
;
1365 struct sockaddr_tipc
*dst
= (struct sockaddr_tipc
*)dest
;
1366 struct msghdr m
= {NULL
,};
1367 struct sk_buff
*buf
;
1368 struct tipc_msg
*msg
;
1373 /* For now, TIPC does not allow use of connect() with DGRAM/RDM types */
1375 if (sock
->state
== SS_READY
) {
1380 /* For now, TIPC does not support the non-blocking form of connect() */
1382 if (flags
& O_NONBLOCK
) {
1387 /* Issue Posix-compliant error code if socket is in the wrong state */
1389 if (sock
->state
== SS_LISTENING
) {
1393 if (sock
->state
== SS_CONNECTING
) {
1397 if (sock
->state
!= SS_UNCONNECTED
) {
1403 * Reject connection attempt using multicast address
1405 * Note: send_msg() validates the rest of the address fields,
1406 * so there's no need to do it here
1409 if (dst
->addrtype
== TIPC_ADDR_MCAST
) {
1414 /* Reject any messages already in receive queue (very unlikely) */
1416 reject_rx_queue(sk
);
1418 /* Send a 'SYN-' to destination */
1421 m
.msg_namelen
= destlen
;
1422 res
= send_msg(NULL
, sock
, &m
, 0);
1427 /* Wait until an 'ACK' or 'RST' arrives, or a timeout occurs */
1430 res
= wait_event_interruptible_timeout(*sk_sleep(sk
),
1431 (!skb_queue_empty(&sk
->sk_receive_queue
) ||
1432 (sock
->state
!= SS_CONNECTING
)),
1437 buf
= skb_peek(&sk
->sk_receive_queue
);
1440 res
= auto_connect(sock
, msg
);
1442 if (!msg_data_sz(msg
))
1443 advance_rx_queue(sk
);
1446 if (sock
->state
== SS_CONNECTED
) {
1449 res
= -ECONNREFUSED
;
1456 ; /* leave "res" unchanged */
1457 sock
->state
= SS_DISCONNECTING
;
1466 * listen - allow socket to listen for incoming connections
1467 * @sock: socket structure
1470 * Returns 0 on success, errno otherwise
1473 static int listen(struct socket
*sock
, int len
)
1475 struct sock
*sk
= sock
->sk
;
1480 if (sock
->state
== SS_READY
)
1482 else if (sock
->state
!= SS_UNCONNECTED
)
1485 sock
->state
= SS_LISTENING
;
1494 * accept - wait for connection request
1495 * @sock: listening socket
1496 * @newsock: new socket that is to be connected
1497 * @flags: file-related flags associated with socket
1499 * Returns 0 on success, errno otherwise
1502 static int accept(struct socket
*sock
, struct socket
*new_sock
, int flags
)
1504 struct sock
*sk
= sock
->sk
;
1505 struct sk_buff
*buf
;
1510 if (sock
->state
== SS_READY
) {
1514 if (sock
->state
!= SS_LISTENING
) {
1519 while (skb_queue_empty(&sk
->sk_receive_queue
)) {
1520 if (flags
& O_NONBLOCK
) {
1525 res
= wait_event_interruptible(*sk_sleep(sk
),
1526 (!skb_queue_empty(&sk
->sk_receive_queue
)));
1532 buf
= skb_peek(&sk
->sk_receive_queue
);
1534 res
= tipc_create(sock_net(sock
->sk
), new_sock
, 0, 0);
1536 struct sock
*new_sk
= new_sock
->sk
;
1537 struct tipc_sock
*new_tsock
= tipc_sk(new_sk
);
1538 struct tipc_port
*new_tport
= new_tsock
->p
;
1539 u32 new_ref
= new_tport
->ref
;
1540 struct tipc_msg
*msg
= buf_msg(buf
);
1545 * Reject any stray messages received by new socket
1546 * before the socket lock was taken (very, very unlikely)
1549 reject_rx_queue(new_sk
);
1551 /* Connect new socket to it's peer */
1553 new_tsock
->peer_name
.ref
= msg_origport(msg
);
1554 new_tsock
->peer_name
.node
= msg_orignode(msg
);
1555 tipc_connect2port(new_ref
, &new_tsock
->peer_name
);
1556 new_sock
->state
= SS_CONNECTED
;
1558 tipc_set_portimportance(new_ref
, msg_importance(msg
));
1559 if (msg_named(msg
)) {
1560 new_tport
->conn_type
= msg_nametype(msg
);
1561 new_tport
->conn_instance
= msg_nameinst(msg
);
1565 * Respond to 'SYN-' by discarding it & returning 'ACK'-.
1566 * Respond to 'SYN+' by queuing it on new socket.
1569 msg_dbg(msg
,"<ACC<: ");
1570 if (!msg_data_sz(msg
)) {
1571 struct msghdr m
= {NULL
,};
1573 advance_rx_queue(sk
);
1574 send_packet(NULL
, new_sock
, &m
, 0);
1576 __skb_dequeue(&sk
->sk_receive_queue
);
1577 __skb_queue_head(&new_sk
->sk_receive_queue
, buf
);
1579 release_sock(new_sk
);
1587 * shutdown - shutdown socket connection
1588 * @sock: socket structure
1589 * @how: direction to close (must be SHUT_RDWR)
1591 * Terminates connection (if necessary), then purges socket's receive queue.
1593 * Returns 0 on success, errno otherwise
1596 static int shutdown(struct socket
*sock
, int how
)
1598 struct sock
*sk
= sock
->sk
;
1599 struct tipc_port
*tport
= tipc_sk_port(sk
);
1600 struct sk_buff
*buf
;
1603 if (how
!= SHUT_RDWR
)
1608 switch (sock
->state
) {
1612 /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */
1614 buf
= __skb_dequeue(&sk
->sk_receive_queue
);
1616 atomic_dec(&tipc_queue_size
);
1617 if (TIPC_SKB_CB(buf
)->handle
!= msg_data(buf_msg(buf
))) {
1621 tipc_disconnect(tport
->ref
);
1622 tipc_reject_msg(buf
, TIPC_CONN_SHUTDOWN
);
1624 tipc_shutdown(tport
->ref
);
1627 sock
->state
= SS_DISCONNECTING
;
1631 case SS_DISCONNECTING
:
1633 /* Discard any unreceived messages; wake up sleeping tasks */
1635 discard_rx_queue(sk
);
1636 if (waitqueue_active(sk_sleep(sk
)))
1637 wake_up_interruptible(sk_sleep(sk
));
1650 * setsockopt - set socket option
1651 * @sock: socket structure
1652 * @lvl: option level
1653 * @opt: option identifier
1654 * @ov: pointer to new option value
1655 * @ol: length of option value
1657 * For stream sockets only, accepts and ignores all IPPROTO_TCP options
1658 * (to ease compatibility).
1660 * Returns 0 on success, errno otherwise
1663 static int setsockopt(struct socket
*sock
,
1664 int lvl
, int opt
, char __user
*ov
, unsigned int ol
)
1666 struct sock
*sk
= sock
->sk
;
1667 struct tipc_port
*tport
= tipc_sk_port(sk
);
1671 if ((lvl
== IPPROTO_TCP
) && (sock
->type
== SOCK_STREAM
))
1673 if (lvl
!= SOL_TIPC
)
1674 return -ENOPROTOOPT
;
1675 if (ol
< sizeof(value
))
1677 if ((res
= get_user(value
, (u32 __user
*)ov
)))
1683 case TIPC_IMPORTANCE
:
1684 res
= tipc_set_portimportance(tport
->ref
, value
);
1686 case TIPC_SRC_DROPPABLE
:
1687 if (sock
->type
!= SOCK_STREAM
)
1688 res
= tipc_set_portunreliable(tport
->ref
, value
);
1692 case TIPC_DEST_DROPPABLE
:
1693 res
= tipc_set_portunreturnable(tport
->ref
, value
);
1695 case TIPC_CONN_TIMEOUT
:
1696 sk
->sk_rcvtimeo
= msecs_to_jiffies(value
);
1697 /* no need to set "res", since already 0 at this point */
1709 * getsockopt - get socket option
1710 * @sock: socket structure
1711 * @lvl: option level
1712 * @opt: option identifier
1713 * @ov: receptacle for option value
1714 * @ol: receptacle for length of option value
1716 * For stream sockets only, returns 0 length result for all IPPROTO_TCP options
1717 * (to ease compatibility).
1719 * Returns 0 on success, errno otherwise
1722 static int getsockopt(struct socket
*sock
,
1723 int lvl
, int opt
, char __user
*ov
, int __user
*ol
)
1725 struct sock
*sk
= sock
->sk
;
1726 struct tipc_port
*tport
= tipc_sk_port(sk
);
1731 if ((lvl
== IPPROTO_TCP
) && (sock
->type
== SOCK_STREAM
))
1732 return put_user(0, ol
);
1733 if (lvl
!= SOL_TIPC
)
1734 return -ENOPROTOOPT
;
1735 if ((res
= get_user(len
, ol
)))
1741 case TIPC_IMPORTANCE
:
1742 res
= tipc_portimportance(tport
->ref
, &value
);
1744 case TIPC_SRC_DROPPABLE
:
1745 res
= tipc_portunreliable(tport
->ref
, &value
);
1747 case TIPC_DEST_DROPPABLE
:
1748 res
= tipc_portunreturnable(tport
->ref
, &value
);
1750 case TIPC_CONN_TIMEOUT
:
1751 value
= jiffies_to_msecs(sk
->sk_rcvtimeo
);
1752 /* no need to set "res", since already 0 at this point */
1754 case TIPC_NODE_RECVQ_DEPTH
:
1755 value
= (u32
)atomic_read(&tipc_queue_size
);
1757 case TIPC_SOCK_RECVQ_DEPTH
:
1758 value
= skb_queue_len(&sk
->sk_receive_queue
);
1769 else if (len
< sizeof(value
)) {
1772 else if (copy_to_user(ov
, &value
, sizeof(value
))) {
1776 res
= put_user(sizeof(value
), ol
);
1783 * Protocol switches for the various types of TIPC sockets
1786 static const struct proto_ops msg_ops
= {
1787 .owner
= THIS_MODULE
,
1792 .socketpair
= sock_no_socketpair
,
1794 .getname
= get_name
,
1796 .ioctl
= sock_no_ioctl
,
1798 .shutdown
= shutdown
,
1799 .setsockopt
= setsockopt
,
1800 .getsockopt
= getsockopt
,
1801 .sendmsg
= send_msg
,
1802 .recvmsg
= recv_msg
,
1803 .mmap
= sock_no_mmap
,
1804 .sendpage
= sock_no_sendpage
1807 static const struct proto_ops packet_ops
= {
1808 .owner
= THIS_MODULE
,
1813 .socketpair
= sock_no_socketpair
,
1815 .getname
= get_name
,
1817 .ioctl
= sock_no_ioctl
,
1819 .shutdown
= shutdown
,
1820 .setsockopt
= setsockopt
,
1821 .getsockopt
= getsockopt
,
1822 .sendmsg
= send_packet
,
1823 .recvmsg
= recv_msg
,
1824 .mmap
= sock_no_mmap
,
1825 .sendpage
= sock_no_sendpage
1828 static const struct proto_ops stream_ops
= {
1829 .owner
= THIS_MODULE
,
1834 .socketpair
= sock_no_socketpair
,
1836 .getname
= get_name
,
1838 .ioctl
= sock_no_ioctl
,
1840 .shutdown
= shutdown
,
1841 .setsockopt
= setsockopt
,
1842 .getsockopt
= getsockopt
,
1843 .sendmsg
= send_stream
,
1844 .recvmsg
= recv_stream
,
1845 .mmap
= sock_no_mmap
,
1846 .sendpage
= sock_no_sendpage
1849 static const struct net_proto_family tipc_family_ops
= {
1850 .owner
= THIS_MODULE
,
1852 .create
= tipc_create
1855 static struct proto tipc_proto
= {
1857 .owner
= THIS_MODULE
,
1858 .obj_size
= sizeof(struct tipc_sock
)
1862 * tipc_socket_init - initialize TIPC socket interface
1864 * Returns 0 on success, errno otherwise
1866 int tipc_socket_init(void)
1870 res
= proto_register(&tipc_proto
, 1);
1872 err("Failed to register TIPC protocol type\n");
1876 res
= sock_register(&tipc_family_ops
);
1878 err("Failed to register TIPC socket type\n");
1879 proto_unregister(&tipc_proto
);
1883 sockets_enabled
= 1;
1889 * tipc_socket_stop - stop TIPC socket interface
1892 void tipc_socket_stop(void)
1894 if (!sockets_enabled
)
1897 sockets_enabled
= 0;
1898 sock_unregister(tipc_family_ops
.family
);
1899 proto_unregister(&tipc_proto
);