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2 * net/tipc/msg.h: Include file for TIPC message header routines
4 * Copyright (c) 2000-2007, 2014-2017 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
68 #define TIPC_GRP_MEMBER_EVT 4
69 #define TIPC_GRP_BCAST_MSG 5
70 #define TIPC_GRP_MCAST_MSG 6
71 #define TIPC_GRP_UCAST_MSG 7
74 * Internal message users
76 #define BCAST_PROTOCOL 5
78 #define LINK_PROTOCOL 7
79 #define CONN_MANAGER 8
80 #define GROUP_PROTOCOL 9
81 #define TUNNEL_PROTOCOL 10
82 #define NAME_DISTRIBUTOR 11
83 #define MSG_FRAGMENTER 12
84 #define LINK_CONFIG 13
86 #define SOCK_WAKEUP 14 /* pseudo user */
87 #define TOP_SRV 15 /* pseudo user */
90 * Message header sizes
92 #define SHORT_H_SIZE 24 /* In-cluster basic payload message */
93 #define BASIC_H_SIZE 32 /* Basic payload message */
94 #define NAMED_H_SIZE 40 /* Named payload message */
95 #define MCAST_H_SIZE 44 /* Multicast payload message */
96 #define GROUP_H_SIZE 44 /* Group payload message */
97 #define INT_H_SIZE 40 /* Internal messages */
98 #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
99 #define MAX_H_SIZE 60 /* Largest possible TIPC header size */
101 #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
102 #define TIPC_MEDIA_INFO_OFFSET 5
104 extern const int one_page_mtu
;
109 struct sk_buff
*tail
;
110 unsigned long nxt_retr
;
111 unsigned long retr_stamp
;
118 #ifdef CONFIG_TIPC_CRYPTO
120 struct tipc_crypto
*rx
;
121 struct tipc_aead
*last
;
123 } tx_clone_ctx __packed
;
129 #ifdef CONFIG_TIPC_CRYPTO
132 #define SKB_PROBING 1
133 #define SKB_GRACING 2
135 u8 tx_clone_deferred
:1;
141 #ifdef CONFIG_TIPC_CRYPTO
146 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
152 /* struct tipc_gap_ack - TIPC Gap ACK block
153 * @ack: seqno of the last consecutive packet in link deferdq
154 * @gap: number of gap packets since the last ack
157 * link deferdq: 1 2 3 4 10 11 13 14 15 20
158 * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0>
160 struct tipc_gap_ack
{
165 /* struct tipc_gap_ack_blks
166 * @len: actual length of the record
167 * @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast
169 * @start_index: starting index for "valid" broadcast Gap ACK blocks
170 * @bgack_cnt: number of Gap ACK blocks for broadcast in the record
171 * @gacks: array of Gap ACK blocks
174 * +-------------+-------------+-------------+-------------+
175 * | bgack_cnt | ugack_cnt | len |
176 * +-------------+-------------+-------------+-------------+ -
178 * +-------------+-------------+-------------+-------------+ > bc gacks
180 * +-------------+-------------+-------------+-------------+ -
182 * +-------------+-------------+-------------+-------------+ > uc gacks
184 * +-------------+-------------+-------------+-------------+ -
186 struct tipc_gap_ack_blks
{
193 struct tipc_gap_ack gacks
[];
196 #define MAX_GAP_ACK_BLKS 128
197 #define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \
198 sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS)
200 static inline struct tipc_msg
*buf_msg(struct sk_buff
*skb
)
202 return (struct tipc_msg
*)skb
->data
;
205 static inline u32
msg_word(struct tipc_msg
*m
, u32 pos
)
207 return ntohl(m
->hdr
[pos
]);
210 static inline void msg_set_word(struct tipc_msg
*m
, u32 w
, u32 val
)
212 m
->hdr
[w
] = htonl(val
);
215 static inline u32
msg_bits(struct tipc_msg
*m
, u32 w
, u32 pos
, u32 mask
)
217 return (msg_word(m
, w
) >> pos
) & mask
;
220 static inline void msg_set_bits(struct tipc_msg
*m
, u32 w
,
221 u32 pos
, u32 mask
, u32 val
)
223 val
= (val
& mask
) << pos
;
225 m
->hdr
[w
] &= ~htonl(mask
);
226 m
->hdr
[w
] |= htonl(val
);
229 static inline void msg_swap_words(struct tipc_msg
*msg
, u32 a
, u32 b
)
231 u32 temp
= msg
->hdr
[a
];
233 msg
->hdr
[a
] = msg
->hdr
[b
];
240 static inline u32
msg_version(struct tipc_msg
*m
)
242 return msg_bits(m
, 0, 29, 7);
245 static inline void msg_set_version(struct tipc_msg
*m
)
247 msg_set_bits(m
, 0, 29, 7, TIPC_VERSION
);
250 static inline u32
msg_user(struct tipc_msg
*m
)
252 return msg_bits(m
, 0, 25, 0xf);
255 static inline u32
msg_isdata(struct tipc_msg
*m
)
257 return msg_user(m
) <= TIPC_CRITICAL_IMPORTANCE
;
260 static inline void msg_set_user(struct tipc_msg
*m
, u32 n
)
262 msg_set_bits(m
, 0, 25, 0xf, n
);
265 static inline u32
msg_hdr_sz(struct tipc_msg
*m
)
267 return msg_bits(m
, 0, 21, 0xf) << 2;
270 static inline void msg_set_hdr_sz(struct tipc_msg
*m
, u32 n
)
272 msg_set_bits(m
, 0, 21, 0xf, n
>>2);
275 static inline u32
msg_size(struct tipc_msg
*m
)
277 return msg_bits(m
, 0, 0, 0x1ffff);
280 static inline u32
msg_blocks(struct tipc_msg
*m
)
282 return (msg_size(m
) / 1024) + 1;
285 static inline u32
msg_data_sz(struct tipc_msg
*m
)
287 return msg_size(m
) - msg_hdr_sz(m
);
290 static inline int msg_non_seq(struct tipc_msg
*m
)
292 return msg_bits(m
, 0, 20, 1);
295 static inline void msg_set_non_seq(struct tipc_msg
*m
, u32 n
)
297 msg_set_bits(m
, 0, 20, 1, n
);
300 static inline int msg_is_syn(struct tipc_msg
*m
)
302 return msg_bits(m
, 0, 17, 1);
305 static inline void msg_set_syn(struct tipc_msg
*m
, u32 d
)
307 msg_set_bits(m
, 0, 17, 1, d
);
310 static inline int msg_dest_droppable(struct tipc_msg
*m
)
312 return msg_bits(m
, 0, 19, 1);
315 static inline void msg_set_dest_droppable(struct tipc_msg
*m
, u32 d
)
317 msg_set_bits(m
, 0, 19, 1, d
);
320 static inline int msg_is_keepalive(struct tipc_msg
*m
)
322 return msg_bits(m
, 0, 19, 1);
325 static inline void msg_set_is_keepalive(struct tipc_msg
*m
, u32 d
)
327 msg_set_bits(m
, 0, 19, 1, d
);
330 static inline int msg_src_droppable(struct tipc_msg
*m
)
332 return msg_bits(m
, 0, 18, 1);
335 static inline void msg_set_src_droppable(struct tipc_msg
*m
, u32 d
)
337 msg_set_bits(m
, 0, 18, 1, d
);
340 static inline int msg_ack_required(struct tipc_msg
*m
)
342 return msg_bits(m
, 0, 18, 1);
345 static inline void msg_set_ack_required(struct tipc_msg
*m
)
347 msg_set_bits(m
, 0, 18, 1, 1);
350 static inline int msg_nagle_ack(struct tipc_msg
*m
)
352 return msg_bits(m
, 0, 18, 1);
355 static inline void msg_set_nagle_ack(struct tipc_msg
*m
)
357 msg_set_bits(m
, 0, 18, 1, 1);
360 static inline bool msg_is_rcast(struct tipc_msg
*m
)
362 return msg_bits(m
, 0, 18, 0x1);
365 static inline void msg_set_is_rcast(struct tipc_msg
*m
, bool d
)
367 msg_set_bits(m
, 0, 18, 0x1, d
);
370 static inline void msg_set_size(struct tipc_msg
*m
, u32 sz
)
372 m
->hdr
[0] = htonl((msg_word(m
, 0) & ~0x1ffff) | sz
);
375 static inline unchar
*msg_data(struct tipc_msg
*m
)
377 return ((unchar
*)m
) + msg_hdr_sz(m
);
380 static inline struct tipc_msg
*msg_inner_hdr(struct tipc_msg
*m
)
382 return (struct tipc_msg
*)msg_data(m
);
388 static inline u32
msg_type(struct tipc_msg
*m
)
390 return msg_bits(m
, 1, 29, 0x7);
393 static inline void msg_set_type(struct tipc_msg
*m
, u32 n
)
395 msg_set_bits(m
, 1, 29, 0x7, n
);
398 static inline int msg_in_group(struct tipc_msg
*m
)
400 int mtyp
= msg_type(m
);
402 return mtyp
>= TIPC_GRP_MEMBER_EVT
&& mtyp
<= TIPC_GRP_UCAST_MSG
;
405 static inline bool msg_is_grp_evt(struct tipc_msg
*m
)
407 return msg_type(m
) == TIPC_GRP_MEMBER_EVT
;
410 static inline u32
msg_named(struct tipc_msg
*m
)
412 return msg_type(m
) == TIPC_NAMED_MSG
;
415 static inline u32
msg_mcast(struct tipc_msg
*m
)
417 int mtyp
= msg_type(m
);
419 return ((mtyp
== TIPC_MCAST_MSG
) || (mtyp
== TIPC_GRP_BCAST_MSG
) ||
420 (mtyp
== TIPC_GRP_MCAST_MSG
));
423 static inline u32
msg_connected(struct tipc_msg
*m
)
425 return msg_type(m
) == TIPC_CONN_MSG
;
428 static inline u32
msg_direct(struct tipc_msg
*m
)
430 return msg_type(m
) == TIPC_DIRECT_MSG
;
433 static inline u32
msg_errcode(struct tipc_msg
*m
)
435 return msg_bits(m
, 1, 25, 0xf);
438 static inline void msg_set_errcode(struct tipc_msg
*m
, u32 err
)
440 msg_set_bits(m
, 1, 25, 0xf, err
);
443 static inline void msg_set_bulk(struct tipc_msg
*m
)
445 msg_set_bits(m
, 1, 28, 0x1, 1);
448 static inline u32
msg_is_bulk(struct tipc_msg
*m
)
450 return msg_bits(m
, 1, 28, 0x1);
453 static inline void msg_set_last_bulk(struct tipc_msg
*m
)
455 msg_set_bits(m
, 1, 27, 0x1, 1);
458 static inline u32
msg_is_last_bulk(struct tipc_msg
*m
)
460 return msg_bits(m
, 1, 27, 0x1);
463 static inline void msg_set_non_legacy(struct tipc_msg
*m
)
465 msg_set_bits(m
, 1, 26, 0x1, 1);
468 static inline u32
msg_is_legacy(struct tipc_msg
*m
)
470 return !msg_bits(m
, 1, 26, 0x1);
473 static inline u32
msg_reroute_cnt(struct tipc_msg
*m
)
475 return msg_bits(m
, 1, 21, 0xf);
478 static inline void msg_incr_reroute_cnt(struct tipc_msg
*m
)
480 msg_set_bits(m
, 1, 21, 0xf, msg_reroute_cnt(m
) + 1);
483 static inline void msg_reset_reroute_cnt(struct tipc_msg
*m
)
485 msg_set_bits(m
, 1, 21, 0xf, 0);
488 static inline u32
msg_lookup_scope(struct tipc_msg
*m
)
490 return msg_bits(m
, 1, 19, 0x3);
493 static inline void msg_set_lookup_scope(struct tipc_msg
*m
, u32 n
)
495 msg_set_bits(m
, 1, 19, 0x3, n
);
498 static inline u16
msg_bcast_ack(struct tipc_msg
*m
)
500 return msg_bits(m
, 1, 0, 0xffff);
503 static inline void msg_set_bcast_ack(struct tipc_msg
*m
, u16 n
)
505 msg_set_bits(m
, 1, 0, 0xffff, n
);
508 /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
509 * link peer session number
511 static inline bool msg_dest_session_valid(struct tipc_msg
*m
)
513 return msg_bits(m
, 1, 16, 0x1);
516 static inline void msg_set_dest_session_valid(struct tipc_msg
*m
, bool valid
)
518 msg_set_bits(m
, 1, 16, 0x1, valid
);
521 static inline u16
msg_dest_session(struct tipc_msg
*m
)
523 return msg_bits(m
, 1, 0, 0xffff);
526 static inline void msg_set_dest_session(struct tipc_msg
*m
, u16 n
)
528 msg_set_bits(m
, 1, 0, 0xffff, n
);
534 static inline u16
msg_ack(struct tipc_msg
*m
)
536 return msg_bits(m
, 2, 16, 0xffff);
539 static inline void msg_set_ack(struct tipc_msg
*m
, u16 n
)
541 msg_set_bits(m
, 2, 16, 0xffff, n
);
544 static inline u16
msg_seqno(struct tipc_msg
*m
)
546 return msg_bits(m
, 2, 0, 0xffff);
549 static inline void msg_set_seqno(struct tipc_msg
*m
, u16 n
)
551 msg_set_bits(m
, 2, 0, 0xffff, n
);
557 static inline u32
msg_importance(struct tipc_msg
*m
)
559 int usr
= msg_user(m
);
561 if (likely((usr
<= TIPC_CRITICAL_IMPORTANCE
) && !msg_errcode(m
)))
563 if ((usr
== MSG_FRAGMENTER
) || (usr
== MSG_BUNDLER
))
564 return msg_bits(m
, 9, 0, 0x7);
565 return TIPC_SYSTEM_IMPORTANCE
;
568 static inline void msg_set_importance(struct tipc_msg
*m
, u32 i
)
570 int usr
= msg_user(m
);
572 if (likely((usr
== MSG_FRAGMENTER
) || (usr
== MSG_BUNDLER
)))
573 msg_set_bits(m
, 9, 0, 0x7, i
);
574 else if (i
< TIPC_SYSTEM_IMPORTANCE
)
577 pr_warn("Trying to set illegal importance in message\n");
580 static inline u32
msg_prevnode(struct tipc_msg
*m
)
582 return msg_word(m
, 3);
585 static inline void msg_set_prevnode(struct tipc_msg
*m
, u32 a
)
587 msg_set_word(m
, 3, a
);
590 static inline u32
msg_origport(struct tipc_msg
*m
)
592 if (msg_user(m
) == MSG_FRAGMENTER
)
593 m
= msg_inner_hdr(m
);
594 return msg_word(m
, 4);
597 static inline void msg_set_origport(struct tipc_msg
*m
, u32 p
)
599 msg_set_word(m
, 4, p
);
602 static inline u16
msg_named_seqno(struct tipc_msg
*m
)
604 return msg_bits(m
, 4, 0, 0xffff);
607 static inline void msg_set_named_seqno(struct tipc_msg
*m
, u16 n
)
609 msg_set_bits(m
, 4, 0, 0xffff, n
);
612 static inline u32
msg_destport(struct tipc_msg
*m
)
614 return msg_word(m
, 5);
617 static inline void msg_set_destport(struct tipc_msg
*m
, u32 p
)
619 msg_set_word(m
, 5, p
);
622 static inline u32
msg_mc_netid(struct tipc_msg
*m
)
624 return msg_word(m
, 5);
627 static inline void msg_set_mc_netid(struct tipc_msg
*m
, u32 p
)
629 msg_set_word(m
, 5, p
);
632 static inline int msg_short(struct tipc_msg
*m
)
634 return msg_hdr_sz(m
) == SHORT_H_SIZE
;
637 static inline u32
msg_orignode(struct tipc_msg
*m
)
639 if (likely(msg_short(m
)))
640 return msg_prevnode(m
);
641 return msg_word(m
, 6);
644 static inline void msg_set_orignode(struct tipc_msg
*m
, u32 a
)
646 msg_set_word(m
, 6, a
);
649 static inline u32
msg_destnode(struct tipc_msg
*m
)
651 return msg_word(m
, 7);
654 static inline void msg_set_destnode(struct tipc_msg
*m
, u32 a
)
656 msg_set_word(m
, 7, a
);
659 static inline u32
msg_nametype(struct tipc_msg
*m
)
661 return msg_word(m
, 8);
664 static inline void msg_set_nametype(struct tipc_msg
*m
, u32 n
)
666 msg_set_word(m
, 8, n
);
669 static inline u32
msg_nameinst(struct tipc_msg
*m
)
671 return msg_word(m
, 9);
674 static inline u32
msg_namelower(struct tipc_msg
*m
)
676 return msg_nameinst(m
);
679 static inline void msg_set_namelower(struct tipc_msg
*m
, u32 n
)
681 msg_set_word(m
, 9, n
);
684 static inline void msg_set_nameinst(struct tipc_msg
*m
, u32 n
)
686 msg_set_namelower(m
, n
);
689 static inline u32
msg_nameupper(struct tipc_msg
*m
)
691 return msg_word(m
, 10);
694 static inline void msg_set_nameupper(struct tipc_msg
*m
, u32 n
)
696 msg_set_word(m
, 10, n
);
700 * Constants and routines used to read and write TIPC internal message headers
704 * Connection management protocol message types
707 #define CONN_PROBE_REPLY 1
711 * Name distributor message types
713 #define PUBLICATION 0
717 * Segmentation message types
719 #define FIRST_FRAGMENT 0
721 #define LAST_FRAGMENT 2
724 * Link management protocol message types
728 #define ACTIVATE_MSG 2
731 * Changeover tunnel message types
734 #define FAILOVER_MSG 1
737 * Config protocol message types
739 #define DSC_REQ_MSG 0
740 #define DSC_RESP_MSG 1
741 #define DSC_TRIAL_MSG 2
742 #define DSC_TRIAL_FAIL_MSG 3
745 * Group protocol message types
747 #define GRP_JOIN_MSG 0
748 #define GRP_LEAVE_MSG 1
749 #define GRP_ADV_MSG 2
750 #define GRP_ACK_MSG 3
751 #define GRP_RECLAIM_MSG 4
752 #define GRP_REMIT_MSG 5
754 /* Crypto message types */
755 #define KEY_DISTR_MSG 0
760 static inline u32
msg_seq_gap(struct tipc_msg
*m
)
762 return msg_bits(m
, 1, 16, 0x1fff);
765 static inline void msg_set_seq_gap(struct tipc_msg
*m
, u32 n
)
767 msg_set_bits(m
, 1, 16, 0x1fff, n
);
770 static inline u32
msg_node_sig(struct tipc_msg
*m
)
772 return msg_bits(m
, 1, 0, 0xffff);
775 static inline void msg_set_node_sig(struct tipc_msg
*m
, u32 n
)
777 msg_set_bits(m
, 1, 0, 0xffff, n
);
780 static inline u32
msg_node_capabilities(struct tipc_msg
*m
)
782 return msg_bits(m
, 1, 15, 0x1fff);
785 static inline void msg_set_node_capabilities(struct tipc_msg
*m
, u32 n
)
787 msg_set_bits(m
, 1, 15, 0x1fff, n
);
793 static inline u32
msg_dest_domain(struct tipc_msg
*m
)
795 return msg_word(m
, 2);
798 static inline void msg_set_dest_domain(struct tipc_msg
*m
, u32 n
)
800 msg_set_word(m
, 2, n
);
803 static inline u32
msg_bcgap_after(struct tipc_msg
*m
)
805 return msg_bits(m
, 2, 16, 0xffff);
808 static inline void msg_set_bcgap_after(struct tipc_msg
*m
, u32 n
)
810 msg_set_bits(m
, 2, 16, 0xffff, n
);
813 static inline u32
msg_bcgap_to(struct tipc_msg
*m
)
815 return msg_bits(m
, 2, 0, 0xffff);
818 static inline void msg_set_bcgap_to(struct tipc_msg
*m
, u32 n
)
820 msg_set_bits(m
, 2, 0, 0xffff, n
);
826 static inline u32
msg_last_bcast(struct tipc_msg
*m
)
828 return msg_bits(m
, 4, 16, 0xffff);
831 static inline u32
msg_bc_snd_nxt(struct tipc_msg
*m
)
833 return msg_last_bcast(m
) + 1;
836 static inline void msg_set_last_bcast(struct tipc_msg
*m
, u32 n
)
838 msg_set_bits(m
, 4, 16, 0xffff, n
);
841 static inline u32
msg_nof_fragms(struct tipc_msg
*m
)
843 return msg_bits(m
, 4, 0, 0xffff);
846 static inline void msg_set_nof_fragms(struct tipc_msg
*m
, u32 n
)
848 msg_set_bits(m
, 4, 0, 0xffff, n
);
851 static inline u32
msg_fragm_no(struct tipc_msg
*m
)
853 return msg_bits(m
, 4, 16, 0xffff);
856 static inline void msg_set_fragm_no(struct tipc_msg
*m
, u32 n
)
858 msg_set_bits(m
, 4, 16, 0xffff, n
);
861 static inline u16
msg_next_sent(struct tipc_msg
*m
)
863 return msg_bits(m
, 4, 0, 0xffff);
866 static inline void msg_set_next_sent(struct tipc_msg
*m
, u16 n
)
868 msg_set_bits(m
, 4, 0, 0xffff, n
);
871 static inline void msg_set_long_msgno(struct tipc_msg
*m
, u32 n
)
873 msg_set_bits(m
, 4, 0, 0xffff, n
);
876 static inline u32
msg_bc_netid(struct tipc_msg
*m
)
878 return msg_word(m
, 4);
881 static inline void msg_set_bc_netid(struct tipc_msg
*m
, u32 id
)
883 msg_set_word(m
, 4, id
);
886 static inline u32
msg_link_selector(struct tipc_msg
*m
)
888 if (msg_user(m
) == MSG_FRAGMENTER
)
889 m
= (void *)msg_data(m
);
890 return msg_bits(m
, 4, 0, 1);
896 static inline u16
msg_session(struct tipc_msg
*m
)
898 return msg_bits(m
, 5, 16, 0xffff);
901 static inline void msg_set_session(struct tipc_msg
*m
, u16 n
)
903 msg_set_bits(m
, 5, 16, 0xffff, n
);
906 static inline u32
msg_probe(struct tipc_msg
*m
)
908 return msg_bits(m
, 5, 0, 1);
911 static inline void msg_set_probe(struct tipc_msg
*m
, u32 val
)
913 msg_set_bits(m
, 5, 0, 1, val
);
916 static inline char msg_net_plane(struct tipc_msg
*m
)
918 return msg_bits(m
, 5, 1, 7) + 'A';
921 static inline void msg_set_net_plane(struct tipc_msg
*m
, char n
)
923 msg_set_bits(m
, 5, 1, 7, (n
- 'A'));
926 static inline u32
msg_linkprio(struct tipc_msg
*m
)
928 return msg_bits(m
, 5, 4, 0x1f);
931 static inline void msg_set_linkprio(struct tipc_msg
*m
, u32 n
)
933 msg_set_bits(m
, 5, 4, 0x1f, n
);
936 static inline u32
msg_bearer_id(struct tipc_msg
*m
)
938 return msg_bits(m
, 5, 9, 0x7);
941 static inline void msg_set_bearer_id(struct tipc_msg
*m
, u32 n
)
943 msg_set_bits(m
, 5, 9, 0x7, n
);
946 static inline u32
msg_redundant_link(struct tipc_msg
*m
)
948 return msg_bits(m
, 5, 12, 0x1);
951 static inline void msg_set_redundant_link(struct tipc_msg
*m
, u32 r
)
953 msg_set_bits(m
, 5, 12, 0x1, r
);
956 static inline u32
msg_peer_stopping(struct tipc_msg
*m
)
958 return msg_bits(m
, 5, 13, 0x1);
961 static inline void msg_set_peer_stopping(struct tipc_msg
*m
, u32 s
)
963 msg_set_bits(m
, 5, 13, 0x1, s
);
966 static inline bool msg_bc_ack_invalid(struct tipc_msg
*m
)
968 switch (msg_user(m
)) {
970 case NAME_DISTRIBUTOR
:
972 return msg_bits(m
, 5, 14, 0x1);
978 static inline void msg_set_bc_ack_invalid(struct tipc_msg
*m
, bool invalid
)
980 msg_set_bits(m
, 5, 14, 0x1, invalid
);
983 static inline char *msg_media_addr(struct tipc_msg
*m
)
985 return (char *)&m
->hdr
[TIPC_MEDIA_INFO_OFFSET
];
988 static inline u32
msg_bc_gap(struct tipc_msg
*m
)
990 return msg_bits(m
, 8, 0, 0x3ff);
993 static inline void msg_set_bc_gap(struct tipc_msg
*m
, u32 n
)
995 msg_set_bits(m
, 8, 0, 0x3ff, n
);
1001 static inline u16
msg_msgcnt(struct tipc_msg
*m
)
1003 return msg_bits(m
, 9, 16, 0xffff);
1006 static inline void msg_set_msgcnt(struct tipc_msg
*m
, u16 n
)
1008 msg_set_bits(m
, 9, 16, 0xffff, n
);
1011 static inline u16
msg_syncpt(struct tipc_msg
*m
)
1013 return msg_bits(m
, 9, 16, 0xffff);
1016 static inline void msg_set_syncpt(struct tipc_msg
*m
, u16 n
)
1018 msg_set_bits(m
, 9, 16, 0xffff, n
);
1021 static inline u32
msg_conn_ack(struct tipc_msg
*m
)
1023 return msg_bits(m
, 9, 16, 0xffff);
1026 static inline void msg_set_conn_ack(struct tipc_msg
*m
, u32 n
)
1028 msg_set_bits(m
, 9, 16, 0xffff, n
);
1031 static inline u16
msg_adv_win(struct tipc_msg
*m
)
1033 return msg_bits(m
, 9, 0, 0xffff);
1036 static inline void msg_set_adv_win(struct tipc_msg
*m
, u16 n
)
1038 msg_set_bits(m
, 9, 0, 0xffff, n
);
1041 static inline u32
msg_max_pkt(struct tipc_msg
*m
)
1043 return msg_bits(m
, 9, 16, 0xffff) * 4;
1046 static inline void msg_set_max_pkt(struct tipc_msg
*m
, u32 n
)
1048 msg_set_bits(m
, 9, 16, 0xffff, (n
/ 4));
1051 static inline u32
msg_link_tolerance(struct tipc_msg
*m
)
1053 return msg_bits(m
, 9, 0, 0xffff);
1056 static inline void msg_set_link_tolerance(struct tipc_msg
*m
, u32 n
)
1058 msg_set_bits(m
, 9, 0, 0xffff, n
);
1061 static inline u16
msg_grp_bc_syncpt(struct tipc_msg
*m
)
1063 return msg_bits(m
, 9, 16, 0xffff);
1066 static inline void msg_set_grp_bc_syncpt(struct tipc_msg
*m
, u16 n
)
1068 msg_set_bits(m
, 9, 16, 0xffff, n
);
1071 static inline u16
msg_grp_bc_acked(struct tipc_msg
*m
)
1073 return msg_bits(m
, 9, 16, 0xffff);
1076 static inline void msg_set_grp_bc_acked(struct tipc_msg
*m
, u16 n
)
1078 msg_set_bits(m
, 9, 16, 0xffff, n
);
1081 static inline u16
msg_grp_remitted(struct tipc_msg
*m
)
1083 return msg_bits(m
, 9, 16, 0xffff);
1086 static inline void msg_set_grp_remitted(struct tipc_msg
*m
, u16 n
)
1088 msg_set_bits(m
, 9, 16, 0xffff, n
);
1093 static inline u16
msg_grp_evt(struct tipc_msg
*m
)
1095 return msg_bits(m
, 10, 0, 0x3);
1098 static inline void msg_set_grp_evt(struct tipc_msg
*m
, int n
)
1100 msg_set_bits(m
, 10, 0, 0x3, n
);
1103 static inline u16
msg_grp_bc_ack_req(struct tipc_msg
*m
)
1105 return msg_bits(m
, 10, 0, 0x1);
1108 static inline void msg_set_grp_bc_ack_req(struct tipc_msg
*m
, bool n
)
1110 msg_set_bits(m
, 10, 0, 0x1, n
);
1113 static inline u16
msg_grp_bc_seqno(struct tipc_msg
*m
)
1115 return msg_bits(m
, 10, 16, 0xffff);
1118 static inline void msg_set_grp_bc_seqno(struct tipc_msg
*m
, u32 n
)
1120 msg_set_bits(m
, 10, 16, 0xffff, n
);
1123 static inline bool msg_peer_link_is_up(struct tipc_msg
*m
)
1125 if (likely(msg_user(m
) != LINK_PROTOCOL
))
1127 if (msg_type(m
) == STATE_MSG
)
1132 static inline bool msg_peer_node_is_up(struct tipc_msg
*m
)
1134 if (msg_peer_link_is_up(m
))
1136 return msg_redundant_link(m
);
1139 static inline bool msg_is_reset(struct tipc_msg
*hdr
)
1141 return (msg_user(hdr
) == LINK_PROTOCOL
) && (msg_type(hdr
) == RESET_MSG
);
1146 static inline void msg_set_peer_net_hash(struct tipc_msg
*m
, u32 n
)
1148 msg_set_word(m
, 13, n
);
1151 static inline u32
msg_peer_net_hash(struct tipc_msg
*m
)
1153 return msg_word(m
, 13);
1158 static inline u32
msg_sugg_node_addr(struct tipc_msg
*m
)
1160 return msg_word(m
, 14);
1163 static inline void msg_set_sugg_node_addr(struct tipc_msg
*m
, u32 n
)
1165 msg_set_word(m
, 14, n
);
1168 static inline void msg_set_node_id(struct tipc_msg
*hdr
, u8
*id
)
1170 memcpy(msg_data(hdr
), id
, 16);
1173 static inline u8
*msg_node_id(struct tipc_msg
*hdr
)
1175 return (u8
*)msg_data(hdr
);
1178 struct sk_buff
*tipc_buf_acquire(u32 size
, gfp_t gfp
);
1179 bool tipc_msg_validate(struct sk_buff
**_skb
);
1180 bool tipc_msg_reverse(u32 own_addr
, struct sk_buff
**skb
, int err
);
1181 void tipc_skb_reject(struct net
*net
, int err
, struct sk_buff
*skb
,
1182 struct sk_buff_head
*xmitq
);
1183 void tipc_msg_init(u32 own_addr
, struct tipc_msg
*m
, u32 user
, u32 type
,
1184 u32 hsize
, u32 destnode
);
1185 struct sk_buff
*tipc_msg_create(uint user
, uint type
, uint hdr_sz
,
1186 uint data_sz
, u32 dnode
, u32 onode
,
1187 u32 dport
, u32 oport
, int errcode
);
1188 int tipc_buf_append(struct sk_buff
**headbuf
, struct sk_buff
**buf
);
1189 bool tipc_msg_try_bundle(struct sk_buff
*tskb
, struct sk_buff
**skb
, u32 mss
,
1190 u32 dnode
, bool *new_bundle
);
1191 bool tipc_msg_extract(struct sk_buff
*skb
, struct sk_buff
**iskb
, int *pos
);
1192 int tipc_msg_fragment(struct sk_buff
*skb
, const struct tipc_msg
*hdr
,
1193 int pktmax
, struct sk_buff_head
*frags
);
1194 int tipc_msg_build(struct tipc_msg
*mhdr
, struct msghdr
*m
,
1195 int offset
, int dsz
, int mtu
, struct sk_buff_head
*list
);
1196 int tipc_msg_append(struct tipc_msg
*hdr
, struct msghdr
*m
, int dlen
,
1197 int mss
, struct sk_buff_head
*txq
);
1198 bool tipc_msg_lookup_dest(struct net
*net
, struct sk_buff
*skb
, int *err
);
1199 bool tipc_msg_assemble(struct sk_buff_head
*list
);
1200 bool tipc_msg_reassemble(struct sk_buff_head
*list
, struct sk_buff_head
*rcvq
);
1201 bool tipc_msg_pskb_copy(u32 dst
, struct sk_buff_head
*msg
,
1202 struct sk_buff_head
*cpy
);
1203 bool __tipc_skb_queue_sorted(struct sk_buff_head
*list
, u16 seqno
,
1204 struct sk_buff
*skb
);
1205 bool tipc_msg_skb_clone(struct sk_buff_head
*msg
, struct sk_buff_head
*cpy
);
1207 static inline u16
buf_seqno(struct sk_buff
*skb
)
1209 return msg_seqno(buf_msg(skb
));
1212 static inline int buf_roundup_len(struct sk_buff
*skb
)
1214 return (skb
->len
/ 1024 + 1) * 1024;
1217 /* tipc_skb_peek(): peek and reserve first buffer in list
1218 * @list: list to be peeked in
1219 * Returns pointer to first buffer in list, if any
1221 static inline struct sk_buff
*tipc_skb_peek(struct sk_buff_head
*list
,
1224 struct sk_buff
*skb
;
1227 skb
= skb_peek(list
);
1230 spin_unlock_bh(lock
);
1234 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
1235 * up to and including 'filter'.
1236 * Note: ignoring previously tried destinations minimizes the risk of
1237 * contention on the socket lock
1238 * @list: list to be peeked in
1239 * @filter: last destination to be ignored from search
1240 * Returns a destination port number, of applicable.
1242 static inline u32
tipc_skb_peek_port(struct sk_buff_head
*list
, u32 filter
)
1244 struct sk_buff
*skb
;
1248 spin_lock_bh(&list
->lock
);
1249 skb_queue_walk(list
, skb
) {
1250 dport
= msg_destport(buf_msg(skb
));
1251 if (!filter
|| skb_queue_is_last(list
, skb
))
1253 if (dport
== filter
)
1258 spin_unlock_bh(&list
->lock
);
1262 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1263 * @list: list to be unlinked from
1264 * @dport: selection criteria for buffer to unlink
1266 static inline struct sk_buff
*tipc_skb_dequeue(struct sk_buff_head
*list
,
1269 struct sk_buff
*_skb
, *tmp
, *skb
= NULL
;
1271 spin_lock_bh(&list
->lock
);
1272 skb_queue_walk_safe(list
, _skb
, tmp
) {
1273 if (msg_destport(buf_msg(_skb
)) == dport
) {
1274 __skb_unlink(_skb
, list
);
1279 spin_unlock_bh(&list
->lock
);
1283 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1284 * @list: the new list to append. Not lock protected
1285 * @head: target list. Lock protected.
1287 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head
*list
,
1288 struct sk_buff_head
*head
)
1290 spin_lock_bh(&head
->lock
);
1291 skb_queue_splice_tail(list
, head
);
1292 spin_unlock_bh(&head
->lock
);
1295 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1296 * @list: the new list to add. Lock protected. Will be reinitialized
1297 * @head: target list. Lock protected.
1299 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head
*list
,
1300 struct sk_buff_head
*head
)
1302 struct sk_buff_head tmp
;
1304 __skb_queue_head_init(&tmp
);
1306 spin_lock_bh(&list
->lock
);
1307 skb_queue_splice_tail_init(list
, &tmp
);
1308 spin_unlock_bh(&list
->lock
);
1309 tipc_skb_queue_splice_tail(&tmp
, head
);
1312 /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno
1313 * @list: list to be dequeued from
1314 * @seqno: seqno of the expected msg
1316 * returns skb dequeued from the list if its seqno is less than or equal to
1317 * the expected one, otherwise the skb is still hold
1319 * Note: must be used with appropriate locks held only
1321 static inline struct sk_buff
*__tipc_skb_dequeue(struct sk_buff_head
*list
,
1324 struct sk_buff
*skb
= skb_peek(list
);
1326 if (skb
&& less_eq(buf_seqno(skb
), seqno
)) {
1327 __skb_unlink(skb
, list
);