2 * net/tipc/msg.h: Include file for TIPC message header routines
4 * Copyright (c) 2000-2007, 2014-2015 Ericsson AB
5 * Copyright (c) 2005-2008, 2010-2011, 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.
40 #include <linux/tipc.h>
44 * Constants and routines used to read and write TIPC payload message headers
46 * Note: Some items are also used with TIPC internal message headers
48 #define TIPC_VERSION 2
52 * Payload message users are defined in TIPC's public API:
53 * - TIPC_LOW_IMPORTANCE
54 * - TIPC_MEDIUM_IMPORTANCE
55 * - TIPC_HIGH_IMPORTANCE
56 * - TIPC_CRITICAL_IMPORTANCE
58 #define TIPC_SYSTEM_IMPORTANCE 4
62 * Payload message types
64 #define TIPC_CONN_MSG 0
65 #define TIPC_MCAST_MSG 1
66 #define TIPC_NAMED_MSG 2
67 #define TIPC_DIRECT_MSG 3
70 * Internal message users
72 #define BCAST_PROTOCOL 5
74 #define LINK_PROTOCOL 7
75 #define CONN_MANAGER 8
76 #define TUNNEL_PROTOCOL 10
77 #define NAME_DISTRIBUTOR 11
78 #define MSG_FRAGMENTER 12
79 #define LINK_CONFIG 13
80 #define SOCK_WAKEUP 14 /* pseudo user */
83 * Message header sizes
85 #define SHORT_H_SIZE 24 /* In-cluster basic payload message */
86 #define BASIC_H_SIZE 32 /* Basic payload message */
87 #define NAMED_H_SIZE 40 /* Named payload message */
88 #define MCAST_H_SIZE 44 /* Multicast payload message */
89 #define INT_H_SIZE 40 /* Internal messages */
90 #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
91 #define MAX_H_SIZE 60 /* Largest possible TIPC header size */
93 #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
95 #define TIPC_MEDIA_INFO_OFFSET 5
98 * TIPC message buffer code
100 * TIPC message buffer headroom reserves space for the worst-case
101 * link-level device header (in case the message is sent off-node).
103 * Note: Headroom should be a multiple of 4 to ensure the TIPC header fields
104 * are word aligned for quicker access
106 #define BUF_HEADROOM (LL_MAX_HEADER + 48)
110 struct sk_buff
*tail
;
117 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
123 static inline struct tipc_msg
*buf_msg(struct sk_buff
*skb
)
125 return (struct tipc_msg
*)skb
->data
;
128 static inline u32
msg_word(struct tipc_msg
*m
, u32 pos
)
130 return ntohl(m
->hdr
[pos
]);
133 static inline void msg_set_word(struct tipc_msg
*m
, u32 w
, u32 val
)
135 m
->hdr
[w
] = htonl(val
);
138 static inline u32
msg_bits(struct tipc_msg
*m
, u32 w
, u32 pos
, u32 mask
)
140 return (msg_word(m
, w
) >> pos
) & mask
;
143 static inline void msg_set_bits(struct tipc_msg
*m
, u32 w
,
144 u32 pos
, u32 mask
, u32 val
)
146 val
= (val
& mask
) << pos
;
148 m
->hdr
[w
] &= ~htonl(mask
);
149 m
->hdr
[w
] |= htonl(val
);
152 static inline void msg_swap_words(struct tipc_msg
*msg
, u32 a
, u32 b
)
154 u32 temp
= msg
->hdr
[a
];
156 msg
->hdr
[a
] = msg
->hdr
[b
];
163 static inline u32
msg_version(struct tipc_msg
*m
)
165 return msg_bits(m
, 0, 29, 7);
168 static inline void msg_set_version(struct tipc_msg
*m
)
170 msg_set_bits(m
, 0, 29, 7, TIPC_VERSION
);
173 static inline u32
msg_user(struct tipc_msg
*m
)
175 return msg_bits(m
, 0, 25, 0xf);
178 static inline u32
msg_isdata(struct tipc_msg
*m
)
180 return msg_user(m
) <= TIPC_CRITICAL_IMPORTANCE
;
183 static inline void msg_set_user(struct tipc_msg
*m
, u32 n
)
185 msg_set_bits(m
, 0, 25, 0xf, n
);
188 static inline u32
msg_hdr_sz(struct tipc_msg
*m
)
190 return msg_bits(m
, 0, 21, 0xf) << 2;
193 static inline void msg_set_hdr_sz(struct tipc_msg
*m
, u32 n
)
195 msg_set_bits(m
, 0, 21, 0xf, n
>>2);
198 static inline u32
msg_size(struct tipc_msg
*m
)
200 return msg_bits(m
, 0, 0, 0x1ffff);
203 static inline u32
msg_data_sz(struct tipc_msg
*m
)
205 return msg_size(m
) - msg_hdr_sz(m
);
208 static inline int msg_non_seq(struct tipc_msg
*m
)
210 return msg_bits(m
, 0, 20, 1);
213 static inline void msg_set_non_seq(struct tipc_msg
*m
, u32 n
)
215 msg_set_bits(m
, 0, 20, 1, n
);
218 static inline int msg_dest_droppable(struct tipc_msg
*m
)
220 return msg_bits(m
, 0, 19, 1);
223 static inline void msg_set_dest_droppable(struct tipc_msg
*m
, u32 d
)
225 msg_set_bits(m
, 0, 19, 1, d
);
228 static inline int msg_src_droppable(struct tipc_msg
*m
)
230 return msg_bits(m
, 0, 18, 1);
233 static inline void msg_set_src_droppable(struct tipc_msg
*m
, u32 d
)
235 msg_set_bits(m
, 0, 18, 1, d
);
238 static inline void msg_set_size(struct tipc_msg
*m
, u32 sz
)
240 m
->hdr
[0] = htonl((msg_word(m
, 0) & ~0x1ffff) | sz
);
243 static inline unchar
*msg_data(struct tipc_msg
*m
)
245 return ((unchar
*)m
) + msg_hdr_sz(m
);
248 static inline struct tipc_msg
*msg_get_wrapped(struct tipc_msg
*m
)
250 return (struct tipc_msg
*)msg_data(m
);
256 static inline u32
msg_type(struct tipc_msg
*m
)
258 return msg_bits(m
, 1, 29, 0x7);
261 static inline void msg_set_type(struct tipc_msg
*m
, u32 n
)
263 msg_set_bits(m
, 1, 29, 0x7, n
);
266 static inline u32
msg_named(struct tipc_msg
*m
)
268 return msg_type(m
) == TIPC_NAMED_MSG
;
271 static inline u32
msg_mcast(struct tipc_msg
*m
)
273 return msg_type(m
) == TIPC_MCAST_MSG
;
276 static inline u32
msg_connected(struct tipc_msg
*m
)
278 return msg_type(m
) == TIPC_CONN_MSG
;
281 static inline u32
msg_errcode(struct tipc_msg
*m
)
283 return msg_bits(m
, 1, 25, 0xf);
286 static inline void msg_set_errcode(struct tipc_msg
*m
, u32 err
)
288 msg_set_bits(m
, 1, 25, 0xf, err
);
291 static inline u32
msg_reroute_cnt(struct tipc_msg
*m
)
293 return msg_bits(m
, 1, 21, 0xf);
296 static inline void msg_incr_reroute_cnt(struct tipc_msg
*m
)
298 msg_set_bits(m
, 1, 21, 0xf, msg_reroute_cnt(m
) + 1);
301 static inline void msg_reset_reroute_cnt(struct tipc_msg
*m
)
303 msg_set_bits(m
, 1, 21, 0xf, 0);
306 static inline u32
msg_lookup_scope(struct tipc_msg
*m
)
308 return msg_bits(m
, 1, 19, 0x3);
311 static inline void msg_set_lookup_scope(struct tipc_msg
*m
, u32 n
)
313 msg_set_bits(m
, 1, 19, 0x3, n
);
316 static inline u16
msg_bcast_ack(struct tipc_msg
*m
)
318 return msg_bits(m
, 1, 0, 0xffff);
321 static inline void msg_set_bcast_ack(struct tipc_msg
*m
, u16 n
)
323 msg_set_bits(m
, 1, 0, 0xffff, n
);
330 static inline u16
msg_ack(struct tipc_msg
*m
)
332 return msg_bits(m
, 2, 16, 0xffff);
335 static inline void msg_set_ack(struct tipc_msg
*m
, u16 n
)
337 msg_set_bits(m
, 2, 16, 0xffff, n
);
340 static inline u16
msg_seqno(struct tipc_msg
*m
)
342 return msg_bits(m
, 2, 0, 0xffff);
345 static inline void msg_set_seqno(struct tipc_msg
*m
, u16 n
)
347 msg_set_bits(m
, 2, 0, 0xffff, n
);
353 static inline u32
msg_importance(struct tipc_msg
*m
)
355 int usr
= msg_user(m
);
357 if (likely((usr
<= TIPC_CRITICAL_IMPORTANCE
) && !msg_errcode(m
)))
359 if ((usr
== MSG_FRAGMENTER
) || (usr
== MSG_BUNDLER
))
360 return msg_bits(m
, 9, 0, 0x7);
361 return TIPC_SYSTEM_IMPORTANCE
;
364 static inline void msg_set_importance(struct tipc_msg
*m
, u32 i
)
366 int usr
= msg_user(m
);
368 if (likely((usr
== MSG_FRAGMENTER
) || (usr
== MSG_BUNDLER
)))
369 msg_set_bits(m
, 9, 0, 0x7, i
);
370 else if (i
< TIPC_SYSTEM_IMPORTANCE
)
373 pr_warn("Trying to set illegal importance in message\n");
376 static inline u32
msg_prevnode(struct tipc_msg
*m
)
378 return msg_word(m
, 3);
381 static inline void msg_set_prevnode(struct tipc_msg
*m
, u32 a
)
383 msg_set_word(m
, 3, a
);
386 static inline u32
msg_origport(struct tipc_msg
*m
)
388 if (msg_user(m
) == MSG_FRAGMENTER
)
389 m
= msg_get_wrapped(m
);
390 return msg_word(m
, 4);
393 static inline void msg_set_origport(struct tipc_msg
*m
, u32 p
)
395 msg_set_word(m
, 4, p
);
398 static inline u32
msg_destport(struct tipc_msg
*m
)
400 return msg_word(m
, 5);
403 static inline void msg_set_destport(struct tipc_msg
*m
, u32 p
)
405 msg_set_word(m
, 5, p
);
408 static inline u32
msg_mc_netid(struct tipc_msg
*m
)
410 return msg_word(m
, 5);
413 static inline void msg_set_mc_netid(struct tipc_msg
*m
, u32 p
)
415 msg_set_word(m
, 5, p
);
418 static inline int msg_short(struct tipc_msg
*m
)
420 return msg_hdr_sz(m
) == SHORT_H_SIZE
;
423 static inline u32
msg_orignode(struct tipc_msg
*m
)
425 if (likely(msg_short(m
)))
426 return msg_prevnode(m
);
427 return msg_word(m
, 6);
430 static inline void msg_set_orignode(struct tipc_msg
*m
, u32 a
)
432 msg_set_word(m
, 6, a
);
435 static inline u32
msg_destnode(struct tipc_msg
*m
)
437 return msg_word(m
, 7);
440 static inline void msg_set_destnode(struct tipc_msg
*m
, u32 a
)
442 msg_set_word(m
, 7, a
);
445 static inline u32
msg_nametype(struct tipc_msg
*m
)
447 return msg_word(m
, 8);
450 static inline void msg_set_nametype(struct tipc_msg
*m
, u32 n
)
452 msg_set_word(m
, 8, n
);
455 static inline u32
msg_nameinst(struct tipc_msg
*m
)
457 return msg_word(m
, 9);
460 static inline u32
msg_namelower(struct tipc_msg
*m
)
462 return msg_nameinst(m
);
465 static inline void msg_set_namelower(struct tipc_msg
*m
, u32 n
)
467 msg_set_word(m
, 9, n
);
470 static inline void msg_set_nameinst(struct tipc_msg
*m
, u32 n
)
472 msg_set_namelower(m
, n
);
475 static inline u32
msg_nameupper(struct tipc_msg
*m
)
477 return msg_word(m
, 10);
480 static inline void msg_set_nameupper(struct tipc_msg
*m
, u32 n
)
482 msg_set_word(m
, 10, n
);
486 * Constants and routines used to read and write TIPC internal message headers
490 * Connection management protocol message types
493 #define CONN_PROBE_REPLY 1
497 * Name distributor message types
499 #define PUBLICATION 0
503 * Segmentation message types
505 #define FIRST_FRAGMENT 0
507 #define LAST_FRAGMENT 2
510 * Link management protocol message types
514 #define ACTIVATE_MSG 2
517 * Changeover tunnel message types
520 #define FAILOVER_MSG 1
523 * Config protocol message types
525 #define DSC_REQ_MSG 0
526 #define DSC_RESP_MSG 1
531 static inline u32
msg_seq_gap(struct tipc_msg
*m
)
533 return msg_bits(m
, 1, 16, 0x1fff);
536 static inline void msg_set_seq_gap(struct tipc_msg
*m
, u32 n
)
538 msg_set_bits(m
, 1, 16, 0x1fff, n
);
541 static inline u32
msg_node_sig(struct tipc_msg
*m
)
543 return msg_bits(m
, 1, 0, 0xffff);
546 static inline void msg_set_node_sig(struct tipc_msg
*m
, u32 n
)
548 msg_set_bits(m
, 1, 0, 0xffff, n
);
551 static inline u32
msg_node_capabilities(struct tipc_msg
*m
)
553 return msg_bits(m
, 1, 15, 0x1fff);
556 static inline void msg_set_node_capabilities(struct tipc_msg
*m
, u32 n
)
558 msg_set_bits(m
, 1, 15, 0x1fff, n
);
564 static inline u32
msg_dest_domain(struct tipc_msg
*m
)
566 return msg_word(m
, 2);
569 static inline void msg_set_dest_domain(struct tipc_msg
*m
, u32 n
)
571 msg_set_word(m
, 2, n
);
574 static inline u32
msg_bcgap_after(struct tipc_msg
*m
)
576 return msg_bits(m
, 2, 16, 0xffff);
579 static inline void msg_set_bcgap_after(struct tipc_msg
*m
, u32 n
)
581 msg_set_bits(m
, 2, 16, 0xffff, n
);
584 static inline u32
msg_bcgap_to(struct tipc_msg
*m
)
586 return msg_bits(m
, 2, 0, 0xffff);
589 static inline void msg_set_bcgap_to(struct tipc_msg
*m
, u32 n
)
591 msg_set_bits(m
, 2, 0, 0xffff, n
);
598 static inline u32
msg_last_bcast(struct tipc_msg
*m
)
600 return msg_bits(m
, 4, 16, 0xffff);
603 static inline void msg_set_last_bcast(struct tipc_msg
*m
, u32 n
)
605 msg_set_bits(m
, 4, 16, 0xffff, n
);
608 static inline void msg_set_fragm_no(struct tipc_msg
*m
, u32 n
)
610 msg_set_bits(m
, 4, 16, 0xffff, n
);
614 static inline u16
msg_next_sent(struct tipc_msg
*m
)
616 return msg_bits(m
, 4, 0, 0xffff);
619 static inline void msg_set_next_sent(struct tipc_msg
*m
, u16 n
)
621 msg_set_bits(m
, 4, 0, 0xffff, n
);
624 static inline void msg_set_long_msgno(struct tipc_msg
*m
, u32 n
)
626 msg_set_bits(m
, 4, 0, 0xffff, n
);
629 static inline u32
msg_bc_netid(struct tipc_msg
*m
)
631 return msg_word(m
, 4);
634 static inline void msg_set_bc_netid(struct tipc_msg
*m
, u32 id
)
636 msg_set_word(m
, 4, id
);
639 static inline u32
msg_link_selector(struct tipc_msg
*m
)
641 return msg_bits(m
, 4, 0, 1);
644 static inline void msg_set_link_selector(struct tipc_msg
*m
, u32 n
)
646 msg_set_bits(m
, 4, 0, 1, n
);
652 static inline u16
msg_session(struct tipc_msg
*m
)
654 return msg_bits(m
, 5, 16, 0xffff);
657 static inline void msg_set_session(struct tipc_msg
*m
, u16 n
)
659 msg_set_bits(m
, 5, 16, 0xffff, n
);
662 static inline u32
msg_probe(struct tipc_msg
*m
)
664 return msg_bits(m
, 5, 0, 1);
667 static inline void msg_set_probe(struct tipc_msg
*m
, u32 val
)
669 msg_set_bits(m
, 5, 0, 1, val
);
672 static inline char msg_net_plane(struct tipc_msg
*m
)
674 return msg_bits(m
, 5, 1, 7) + 'A';
677 static inline void msg_set_net_plane(struct tipc_msg
*m
, char n
)
679 msg_set_bits(m
, 5, 1, 7, (n
- 'A'));
682 static inline u32
msg_linkprio(struct tipc_msg
*m
)
684 return msg_bits(m
, 5, 4, 0x1f);
687 static inline void msg_set_linkprio(struct tipc_msg
*m
, u32 n
)
689 msg_set_bits(m
, 5, 4, 0x1f, n
);
692 static inline u32
msg_bearer_id(struct tipc_msg
*m
)
694 return msg_bits(m
, 5, 9, 0x7);
697 static inline void msg_set_bearer_id(struct tipc_msg
*m
, u32 n
)
699 msg_set_bits(m
, 5, 9, 0x7, n
);
702 static inline u32
msg_redundant_link(struct tipc_msg
*m
)
704 return msg_bits(m
, 5, 12, 0x1);
707 static inline void msg_set_redundant_link(struct tipc_msg
*m
, u32 r
)
709 msg_set_bits(m
, 5, 12, 0x1, r
);
712 static inline char *msg_media_addr(struct tipc_msg
*m
)
714 return (char *)&m
->hdr
[TIPC_MEDIA_INFO_OFFSET
];
720 static inline u16
msg_msgcnt(struct tipc_msg
*m
)
722 return msg_bits(m
, 9, 16, 0xffff);
725 static inline void msg_set_msgcnt(struct tipc_msg
*m
, u16 n
)
727 msg_set_bits(m
, 9, 16, 0xffff, n
);
730 static inline u32
msg_bcast_tag(struct tipc_msg
*m
)
732 return msg_bits(m
, 9, 16, 0xffff);
735 static inline void msg_set_bcast_tag(struct tipc_msg
*m
, u32 n
)
737 msg_set_bits(m
, 9, 16, 0xffff, n
);
740 static inline u32
msg_max_pkt(struct tipc_msg
*m
)
742 return msg_bits(m
, 9, 16, 0xffff) * 4;
745 static inline void msg_set_max_pkt(struct tipc_msg
*m
, u32 n
)
747 msg_set_bits(m
, 9, 16, 0xffff, (n
/ 4));
750 static inline u32
msg_link_tolerance(struct tipc_msg
*m
)
752 return msg_bits(m
, 9, 0, 0xffff);
755 static inline void msg_set_link_tolerance(struct tipc_msg
*m
, u32 n
)
757 msg_set_bits(m
, 9, 0, 0xffff, n
);
760 static inline bool msg_peer_link_is_up(struct tipc_msg
*m
)
762 if (likely(msg_user(m
) != LINK_PROTOCOL
))
764 if (msg_type(m
) == STATE_MSG
)
769 static inline bool msg_peer_node_is_up(struct tipc_msg
*m
)
771 if (msg_peer_link_is_up(m
))
773 return msg_redundant_link(m
);
776 struct sk_buff
*tipc_buf_acquire(u32 size
);
777 bool tipc_msg_validate(struct sk_buff
*skb
);
778 bool tipc_msg_reverse(u32 own_addr
, struct sk_buff
**skb
, int err
);
779 void tipc_msg_init(u32 own_addr
, struct tipc_msg
*m
, u32 user
, u32 type
,
780 u32 hsize
, u32 destnode
);
781 struct sk_buff
*tipc_msg_create(uint user
, uint type
, uint hdr_sz
,
782 uint data_sz
, u32 dnode
, u32 onode
,
783 u32 dport
, u32 oport
, int errcode
);
784 int tipc_buf_append(struct sk_buff
**headbuf
, struct sk_buff
**buf
);
785 bool tipc_msg_bundle(struct sk_buff
*skb
, struct tipc_msg
*msg
, u32 mtu
);
786 bool tipc_msg_make_bundle(struct sk_buff
**skb
, struct tipc_msg
*msg
,
788 bool tipc_msg_extract(struct sk_buff
*skb
, struct sk_buff
**iskb
, int *pos
);
789 int tipc_msg_build(struct tipc_msg
*mhdr
, struct msghdr
*m
,
790 int offset
, int dsz
, int mtu
, struct sk_buff_head
*list
);
791 bool tipc_msg_lookup_dest(struct net
*net
, struct sk_buff
*skb
, int *err
);
792 struct sk_buff
*tipc_msg_reassemble(struct sk_buff_head
*list
);
794 static inline u16
buf_seqno(struct sk_buff
*skb
)
796 return msg_seqno(buf_msg(skb
));
799 /* tipc_skb_peek(): peek and reserve first buffer in list
800 * @list: list to be peeked in
801 * Returns pointer to first buffer in list, if any
803 static inline struct sk_buff
*tipc_skb_peek(struct sk_buff_head
*list
,
809 skb
= skb_peek(list
);
812 spin_unlock_bh(lock
);
816 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
817 * up to and including 'filter'.
818 * Note: ignoring previously tried destinations minimizes the risk of
819 * contention on the socket lock
820 * @list: list to be peeked in
821 * @filter: last destination to be ignored from search
822 * Returns a destination port number, of applicable.
824 static inline u32
tipc_skb_peek_port(struct sk_buff_head
*list
, u32 filter
)
830 spin_lock_bh(&list
->lock
);
831 skb_queue_walk(list
, skb
) {
832 dport
= msg_destport(buf_msg(skb
));
833 if (!filter
|| skb_queue_is_last(list
, skb
))
840 spin_unlock_bh(&list
->lock
);
844 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
845 * @list: list to be unlinked from
846 * @dport: selection criteria for buffer to unlink
848 static inline struct sk_buff
*tipc_skb_dequeue(struct sk_buff_head
*list
,
851 struct sk_buff
*_skb
, *tmp
, *skb
= NULL
;
853 spin_lock_bh(&list
->lock
);
854 skb_queue_walk_safe(list
, _skb
, tmp
) {
855 if (msg_destport(buf_msg(_skb
)) == dport
) {
856 __skb_unlink(_skb
, list
);
861 spin_unlock_bh(&list
->lock
);
865 /* tipc_skb_queue_sorted(); sort pkt into list according to sequence number
866 * @list: list to be appended to
867 * @skb: buffer to add
868 * Returns true if queue should treated further, otherwise false
870 static inline bool __tipc_skb_queue_sorted(struct sk_buff_head
*list
,
873 struct sk_buff
*_skb
, *tmp
;
874 struct tipc_msg
*hdr
= buf_msg(skb
);
875 u16 seqno
= msg_seqno(hdr
);
877 if (skb_queue_empty(list
) || (msg_user(hdr
) == LINK_PROTOCOL
)) {
878 __skb_queue_head(list
, skb
);
881 if (likely(less(seqno
, buf_seqno(skb_peek(list
))))) {
882 __skb_queue_head(list
, skb
);
885 if (!more(seqno
, buf_seqno(skb_peek_tail(list
)))) {
886 skb_queue_walk_safe(list
, _skb
, tmp
) {
887 if (likely(less(seqno
, buf_seqno(_skb
)))) {
888 __skb_queue_before(list
, _skb
, skb
);
893 __skb_queue_tail(list
, skb
);
897 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
898 * @list: the new list to append. Not lock protected
899 * @head: target list. Lock protected.
901 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head
*list
,
902 struct sk_buff_head
*head
)
904 spin_lock_bh(&head
->lock
);
905 skb_queue_splice_tail(list
, head
);
906 spin_unlock_bh(&head
->lock
);
909 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
910 * @list: the new list to add. Lock protected. Will be reinitialized
911 * @head: target list. Lock protected.
913 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head
*list
,
914 struct sk_buff_head
*head
)
916 struct sk_buff_head tmp
;
918 __skb_queue_head_init(&tmp
);
920 spin_lock_bh(&list
->lock
);
921 skb_queue_splice_tail_init(list
, &tmp
);
922 spin_unlock_bh(&list
->lock
);
923 tipc_skb_queue_splice_tail(&tmp
, head
);
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