[linux-2.6-block.git] / net / tipc / link.h

/*
 * net/tipc/link.h: Include file for TIPC link code
 *
 * Copyright (c) 1995-2006, 2013-2014, Ericsson AB
 * Copyright (c) 2004-2005, 2010-2011, Wind River Systems
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _TIPC_LINK_H
#define _TIPC_LINK_H

#include <net/genetlink.h>
#include "msg.h"
#include "node.h"

/* TIPC-specific error codes
*/
#define ELINKCONG EAGAIN	/* link congestion <=> resource unavailable */

/* Out-of-range value for link sequence numbers
 */
#define INVALID_LINK_SEQ 0x10000

/* Link FSM events:
 */
enum {
	LINK_ESTABLISH_EVT       = 0xec1ab1e,
	LINK_PEER_RESET_EVT      = 0x9eed0e,
	LINK_FAILURE_EVT         = 0xfa110e,
	LINK_RESET_EVT           = 0x10ca1d0e,
	LINK_FAILOVER_BEGIN_EVT  = 0xfa110bee,
	LINK_FAILOVER_END_EVT    = 0xfa110ede,
	LINK_SYNCH_BEGIN_EVT     = 0xc1ccbee,
	LINK_SYNCH_END_EVT       = 0xc1ccede
};

/* Events returned from link at packet reception or at timeout
 */
enum {
	TIPC_LINK_UP_EVT       = 1,
	TIPC_LINK_DOWN_EVT     = (1 << 1),
	TIPC_LINK_SND_BC_ACK   = (1 << 2)
};

/* Starting value for maximum packet size negotiation on unicast links
 * (unless bearer MTU is less)
 */
#define MAX_PKT_DEFAULT 1500

struct tipc_stats {
	u32 sent_info;		/* used in counting # sent packets */
	u32 recv_info;		/* used in counting # recv'd packets */
	u32 sent_states;
	u32 recv_states;
	u32 sent_probes;
	u32 recv_probes;
	u32 sent_nacks;
	u32 recv_nacks;
	u32 sent_acks;
	u32 sent_bundled;
	u32 sent_bundles;
	u32 recv_bundled;
	u32 recv_bundles;
	u32 retransmitted;
	u32 sent_fragmented;
	u32 sent_fragments;
	u32 recv_fragmented;
	u32 recv_fragments;
	u32 link_congs;		/* # port sends blocked by congestion */
	u32 deferred_recv;
	u32 duplicates;
	u32 max_queue_sz;	/* send queue size high water mark */
	u32 accu_queue_sz;	/* used for send queue size profiling */
	u32 queue_sz_counts;	/* used for send queue size profiling */
	u32 msg_length_counts;	/* used for message length profiling */
	u32 msg_lengths_total;	/* used for message length profiling */
	u32 msg_length_profile[7]; /* used for msg. length profiling */
};

/**
 * struct tipc_link - TIPC link data structure
 * @addr: network address of link's peer node
 * @name: link name character string
 * @media_addr: media address to use when sending messages over link
 * @timer: link timer
 * @net: pointer to namespace struct
 * @refcnt: reference counter for permanent references (owner node & timer)
 * @peer_session: link session # being used by peer end of link
 * @peer_bearer_id: bearer id used by link's peer endpoint
 * @bearer_id: local bearer id used by link
 * @tolerance: minimum link continuity loss needed to reset link [in ms]
 * @keepalive_intv: link keepalive timer interval
 * @abort_limit: # of unacknowledged continuity probes needed to reset link
 * @state: current state of link FSM
 * @peer_caps: bitmap describing capabilities of peer node
 * @silent_intv_cnt: # of timer intervals without any reception from peer
 * @proto_msg: template for control messages generated by link
 * @pmsg: convenience pointer to "proto_msg" field
 * @priority: current link priority
 * @net_plane: current link network plane ('A' through 'H')
 * @backlog_limit: backlog queue congestion thresholds (indexed by importance)
 * @exp_msg_count: # of tunnelled messages expected during link changeover
 * @reset_rcv_checkpt: seq # of last acknowledged message at time of link reset
 * @mtu: current maximum packet size for this link
 * @advertised_mtu: advertised own mtu when link is being established
 * @transmitq: queue for sent, non-acked messages
 * @backlogq: queue for messages waiting to be sent
 * @snt_nxt: next sequence number to use for outbound messages
 * @last_retransmitted: sequence number of most recently retransmitted message
 * @stale_count: # of identical retransmit requests made by peer
 * @ackers: # of peers that needs to ack each packet before it can be released
 * @acked: # last packet acked by a certain peer. Used for broadcast.
 * @rcv_nxt: next sequence number to expect for inbound messages
 * @deferred_queue: deferred queue saved OOS b'cast message received from node
 * @unacked_window: # of inbound messages rx'd without ack'ing back to peer
 * @inputq: buffer queue for messages to be delivered upwards
 * @namedq: buffer queue for name table messages to be delivered upwards
 * @next_out: ptr to first unsent outbound message in queue
 * @wakeupq: linked list of wakeup msgs waiting for link congestion to abate
 * @long_msg_seq_no: next identifier to use for outbound fragmented messages
 * @reasm_buf: head of partially reassembled inbound message fragments
 * @bc_rcvr: marks that this is a broadcast receiver link
 * @stats: collects statistics regarding link activity
 */
struct tipc_link {
	u32 addr;
	char name[TIPC_MAX_LINK_NAME];
	struct tipc_media_addr *media_addr;
	struct net *net;

	/* Management and link supervision data */
	u32 peer_session;
	u32 peer_bearer_id;
	u32 bearer_id;
	u32 tolerance;
	unsigned long keepalive_intv;
	u32 abort_limit;
	u32 state;
	u16 peer_caps;
	bool active;
	u32 silent_intv_cnt;
	struct {
		unchar hdr[INT_H_SIZE];
		unchar body[TIPC_MAX_IF_NAME];
	} proto_msg;
	struct tipc_msg *pmsg;
	u32 priority;
	char net_plane;

	/* Failover/synch */
	u16 drop_point;
	struct sk_buff *failover_reasm_skb;

	/* Max packet negotiation */
	u16 mtu;
	u16 advertised_mtu;

	/* Sending */
	struct sk_buff_head transmq;
	struct sk_buff_head backlogq;
	struct {
		u16 len;
		u16 limit;
	} backlog[5];
	u16 snd_nxt;
	u16 last_retransm;
	u16 window;
	u32 stale_count;

	/* Reception */
	u16 rcv_nxt;
	u32 rcv_unacked;
	struct sk_buff_head deferdq;
	struct sk_buff_head *inputq;
	struct sk_buff_head *namedq;

	/* Congestion handling */
	struct sk_buff_head wakeupq;

	/* Fragmentation/reassembly */
	struct sk_buff *reasm_buf;

	/* Broadcast */
	u16 ackers;
	u16 acked;
	struct tipc_link *bc_rcvlink;
	struct tipc_link *bc_sndlink;
	int nack_state;
	bool bc_peer_is_up;

	/* Statistics */
	struct tipc_stats stats;
};

bool tipc_link_create(struct net *net, char *if_name, int bearer_id,
		      int tolerance, char net_plane, u32 mtu, int priority,
		      int window, u32 session, u32 ownnode, u32 peer,
		      u16 peer_caps,
		      struct tipc_link *bc_sndlink,
		      struct tipc_link *bc_rcvlink,
		      struct sk_buff_head *inputq,
		      struct sk_buff_head *namedq,
		      struct tipc_link **link);
bool tipc_link_bc_create(struct net *net, u32 ownnode, u32 peer,
			 int mtu, int window, u16 peer_caps,
			 struct sk_buff_head *inputq,
			 struct sk_buff_head *namedq,
			 struct tipc_link *bc_sndlink,
			 struct tipc_link **link);
void tipc_link_tnl_prepare(struct tipc_link *l, struct tipc_link *tnl,
			   int mtyp, struct sk_buff_head *xmitq);
void tipc_link_build_reset_msg(struct tipc_link *l, struct sk_buff_head *xmitq);
int tipc_link_fsm_evt(struct tipc_link *l, int evt);
void tipc_link_reset_fragments(struct tipc_link *l_ptr);
bool tipc_link_is_up(struct tipc_link *l);
bool tipc_link_peer_is_down(struct tipc_link *l);
bool tipc_link_is_reset(struct tipc_link *l);
bool tipc_link_is_establishing(struct tipc_link *l);
bool tipc_link_is_synching(struct tipc_link *l);
bool tipc_link_is_failingover(struct tipc_link *l);
bool tipc_link_is_blocked(struct tipc_link *l);
void tipc_link_set_active(struct tipc_link *l, bool active);
void tipc_link_reset(struct tipc_link *l_ptr);
int tipc_link_xmit(struct tipc_link *link,	struct sk_buff_head *list,
		   struct sk_buff_head *xmitq);
void tipc_link_set_queue_limits(struct tipc_link *l, u32 window);

int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]);
int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq);
int tipc_link_rcv(struct tipc_link *l, struct sk_buff *skb,
		  struct sk_buff_head *xmitq);
int tipc_link_build_ack_msg(struct tipc_link *l, struct sk_buff_head *xmitq);
void tipc_link_add_bc_peer(struct tipc_link *snd_l,
			   struct tipc_link *uc_l,
			   struct sk_buff_head *xmitq);
void tipc_link_remove_bc_peer(struct tipc_link *snd_l,
			      struct tipc_link *rcv_l,
			      struct sk_buff_head *xmitq);
int tipc_link_bc_peers(struct tipc_link *l);
void tipc_link_set_mtu(struct tipc_link *l, int mtu);
int tipc_link_mtu(struct tipc_link *l);
void tipc_link_bc_ack_rcv(struct tipc_link *l, u16 acked,
			  struct sk_buff_head *xmitq);
void tipc_link_build_bc_sync_msg(struct tipc_link *l,
				 struct sk_buff_head *xmitq);
void tipc_link_bc_init_rcv(struct tipc_link *l, struct tipc_msg *hdr);
void tipc_link_bc_sync_rcv(struct tipc_link *l,   struct tipc_msg *hdr,
			   struct sk_buff_head *xmitq);
int tipc_link_bc_nack_rcv(struct tipc_link *l, struct sk_buff *skb,
			  struct sk_buff_head *xmitq);
#endif
Commit	Line	Data
b97bf3fd PL	1	/*
b97bf3fd PL	2	* net/tipc/link.h: Include file for TIPC link code
c4307285	3	*
50100a5e	4	* Copyright (c) 1995-2006, 2013-2014, Ericsson AB
23dd4cce	5	* Copyright (c) 2004-2005, 2010-2011, Wind River Systems
b97bf3fd PL	6	* All rights reserved.
b97bf3fd PL	7	*
9ea1fd3c	8	* Redistribution and use in source and binary forms, with or without
b97bf3fd PL	9	* modification, are permitted provided that the following conditions are met:
b97bf3fd PL	10	*
9ea1fd3c PL	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.
b97bf3fd	19	*
9ea1fd3c PL	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.
	23	*
	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
b97bf3fd PL	34	* POSSIBILITY OF SUCH DAMAGE.
	35	*/
	36
	37	#ifndef _TIPC_LINK_H
	38	#define _TIPC_LINK_H
	39
0655f6a8	40	#include <net/genetlink.h>
b97bf3fd	41	#include "msg.h"
b97bf3fd PL	42	#include "node.h"
b97bf3fd PL	43
859fc7c0 YX	44	/* TIPC-specific error codes
	45	*/
	46	#define ELINKCONG EAGAIN /* link congestion <=> resource unavailable */
	47
135daee6	48	/* Out-of-range value for link sequence numbers
36559591	49	*/
36559591 AS	50	#define INVALID_LINK_SEQ 0x10000
36559591 AS	51
662921cd	52	/* Link FSM events:
135daee6	53	*/
d3504c34	54	enum {
662921cd JPM	55	LINK_ESTABLISH_EVT = 0xec1ab1e,
	56	LINK_PEER_RESET_EVT = 0x9eed0e,
	57	LINK_FAILURE_EVT = 0xfa110e,
	58	LINK_RESET_EVT = 0x10ca1d0e,
	59	LINK_FAILOVER_BEGIN_EVT = 0xfa110bee,
	60	LINK_FAILOVER_END_EVT = 0xfa110ede,
	61	LINK_SYNCH_BEGIN_EVT = 0xc1ccbee,
	62	LINK_SYNCH_END_EVT = 0xc1ccede
d3504c34	63	};
135daee6	64
d999297c	65	/* Events returned from link at packet reception or at timeout
6ab30f9c JPM	66	*/
	67	enum {
	68	TIPC_LINK_UP_EVT = 1,
52666986 JPM	69	TIPC_LINK_DOWN_EVT = (1 << 1),
52666986 JPM	70	TIPC_LINK_SND_BC_ACK = (1 << 2)
6ab30f9c JPM	71	};
6ab30f9c JPM	72
135daee6	73	/* Starting value for maximum packet size negotiation on unicast links
b97bf3fd PL	74	* (unless bearer MTU is less)
b97bf3fd PL	75	*/
b97bf3fd PL	76	#define MAX_PKT_DEFAULT 1500
b97bf3fd PL	77
7e9cab58 PG	78	struct tipc_stats {
	79	u32 sent_info; /* used in counting # sent packets */
	80	u32 recv_info; /* used in counting # recv'd packets */
	81	u32 sent_states;
	82	u32 recv_states;
	83	u32 sent_probes;
	84	u32 recv_probes;
	85	u32 sent_nacks;
	86	u32 recv_nacks;
	87	u32 sent_acks;
	88	u32 sent_bundled;
	89	u32 sent_bundles;
	90	u32 recv_bundled;
	91	u32 recv_bundles;
	92	u32 retransmitted;
	93	u32 sent_fragmented;
	94	u32 sent_fragments;
	95	u32 recv_fragmented;
	96	u32 recv_fragments;
	97	u32 link_congs; /* # port sends blocked by congestion */
7e9cab58 PG	98	u32 deferred_recv;
	99	u32 duplicates;
	100	u32 max_queue_sz; /* send queue size high water mark */
	101	u32 accu_queue_sz; /* used for send queue size profiling */
	102	u32 queue_sz_counts; /* used for send queue size profiling */
	103	u32 msg_length_counts; /* used for message length profiling */
	104	u32 msg_lengths_total; /* used for message length profiling */
	105	u32 msg_length_profile[7]; /* used for msg. length profiling */
	106	};
	107
b97bf3fd	108	/**
a18c4bc3	109	* struct tipc_link - TIPC link data structure
b97bf3fd PL	110	* @addr: network address of link's peer node
	111	* @name: link name character string
	112	* @media_addr: media address to use when sending messages over link
	113	* @timer: link timer
c72fa872	114	* @net: pointer to namespace struct
2d72d495	115	* @refcnt: reference counter for permanent references (owner node & timer)
b97bf3fd PL	116	* @peer_session: link session # being used by peer end of link
b97bf3fd PL	117	* @peer_bearer_id: bearer id used by link's peer endpoint
7a2f7d18	118	* @bearer_id: local bearer id used by link
c4307285	119	* @tolerance: minimum link continuity loss needed to reset link [in ms]
a97b9d3f	120	* @keepalive_intv: link keepalive timer interval
b97bf3fd PL	121	* @abort_limit: # of unacknowledged continuity probes needed to reset link
b97bf3fd PL	122	* @state: current state of link FSM
fd556f20	123	* @peer_caps: bitmap describing capabilities of peer node
a97b9d3f	124	* @silent_intv_cnt: # of timer intervals without any reception from peer
b97bf3fd PL	125	* @proto_msg: template for control messages generated by link
	126	* @pmsg: convenience pointer to "proto_msg" field
	127	* @priority: current link priority
7a2f7d18	128	* @net_plane: current link network plane ('A' through 'H')
1f66d161	129	* @backlog_limit: backlog queue congestion thresholds (indexed by importance)
b97bf3fd	130	* @exp_msg_count: # of tunnelled messages expected during link changeover
a97b9d3f	131	* @reset_rcv_checkpt: seq # of last acknowledged message at time of link reset
ed193ece JPM	132	* @mtu: current maximum packet size for this link
ed193ece JPM	133	* @advertised_mtu: advertised own mtu when link is being established
05dcc5aa JPM	134	* @transmitq: queue for sent, non-acked messages
05dcc5aa JPM	135	* @backlogq: queue for messages waiting to be sent
a97b9d3f	136	* @snt_nxt: next sequence number to use for outbound messages
b97bf3fd PL	137	* @last_retransmitted: sequence number of most recently retransmitted message
b97bf3fd PL	138	* @stale_count: # of identical retransmit requests made by peer
c1ab3f1d JPM	139	* @ackers: # of peers that needs to ack each packet before it can be released
c1ab3f1d JPM	140	* @acked: # last packet acked by a certain peer. Used for broadcast.
a97b9d3f	141	* @rcv_nxt: next sequence number to expect for inbound messages
bc6fecd4	142	* @deferred_queue: deferred queue saved OOS b'cast message received from node
b97bf3fd	143	* @unacked_window: # of inbound messages rx'd without ack'ing back to peer
c637c103 JPM	144	* @inputq: buffer queue for messages to be delivered upwards
c637c103 JPM	145	* @namedq: buffer queue for name table messages to be delivered upwards
b97bf3fd	146	* @next_out: ptr to first unsent outbound message in queue
c637c103	147	* @wakeupq: linked list of wakeup msgs waiting for link congestion to abate
b97bf3fd	148	* @long_msg_seq_no: next identifier to use for outbound fragmented messages
37e22164	149	* @reasm_buf: head of partially reassembled inbound message fragments
c1ab3f1d	150	* @bc_rcvr: marks that this is a broadcast receiver link
b97bf3fd	151	* @stats: collects statistics regarding link activity
b97bf3fd	152	*/
a18c4bc3	153	struct tipc_link {
b97bf3fd PL	154	u32 addr;
b97bf3fd PL	155	char name[TIPC_MAX_LINK_NAME];
440d8963	156	struct tipc_media_addr *media_addr;
c72fa872	157	struct net *net;
b97bf3fd PL	158
b97bf3fd PL	159	/* Management and link supervision data */
b97bf3fd PL	160	u32 peer_session;
b97bf3fd PL	161	u32 peer_bearer_id;
7a2f7d18	162	u32 bearer_id;
b97bf3fd	163	u32 tolerance;
a97b9d3f	164	unsigned long keepalive_intv;
b97bf3fd	165	u32 abort_limit;
662921cd	166	u32 state;
fd556f20	167	u16 peer_caps;
c72fa872	168	bool active;
a97b9d3f	169	u32 silent_intv_cnt;
b97bf3fd PL	170	struct {
	171	unchar hdr[INT_H_SIZE];
	172	unchar body[TIPC_MAX_IF_NAME];
	173	} proto_msg;
	174	struct tipc_msg *pmsg;
	175	u32 priority;
7a2f7d18	176	char net_plane;
b97bf3fd	177
6e498158	178	/* Failover/synch */
6e498158 JPM	179	u16 drop_point;
6e498158 JPM	180	struct sk_buff *failover_reasm_skb;
b97bf3fd	181
c4307285	182	/* Max packet negotiation */
ed193ece JPM	183	u16 mtu;
ed193ece JPM	184	u16 advertised_mtu;
b97bf3fd PL	185
b97bf3fd PL	186	/* Sending */
05dcc5aa JPM	187	struct sk_buff_head transmq;
05dcc5aa JPM	188	struct sk_buff_head backlogq;
1f66d161 JPM	189	struct {
	190	u16 len;
	191	u16 limit;
	192	} backlog[5];
a97b9d3f JPM	193	u16 snd_nxt;
a97b9d3f JPM	194	u16 last_retransm;
81204c49	195	u16 window;
c4307285	196	u32 stale_count;
b97bf3fd PL	197
b97bf3fd PL	198	/* Reception */
a97b9d3f	199	u16 rcv_nxt;
05dcc5aa JPM	200	u32 rcv_unacked;
05dcc5aa JPM	201	struct sk_buff_head deferdq;
d39bbd44 JPM	202	struct sk_buff_head *inputq;
d39bbd44 JPM	203	struct sk_buff_head *namedq;
b97bf3fd PL	204
b97bf3fd PL	205	/* Congestion handling */
c637c103	206	struct sk_buff_head wakeupq;
b97bf3fd	207
40ba3cdf	208	/* Fragmentation/reassembly */
37e22164	209	struct sk_buff *reasm_buf;
b97bf3fd	210
c1ab3f1d JPM	211	/* Broadcast */
	212	u16 ackers;
	213	u16 acked;
52666986 JPM	214	struct tipc_link *bc_rcvlink;
	215	struct tipc_link *bc_sndlink;
	216	int nack_state;
	217	bool bc_peer_is_up;
c1ab3f1d	218
c4307285	219	/* Statistics */
7e9cab58	220	struct tipc_stats stats;
b97bf3fd PL	221	};
b97bf3fd PL	222
c72fa872	223	bool tipc_link_create(struct net net, char if_name, int bearer_id,
0e05498e JPM	224	int tolerance, char net_plane, u32 mtu, int priority,
0e05498e JPM	225	int window, u32 session, u32 ownnode, u32 peer,
52666986	226	u16 peer_caps,
52666986 JPM	227	struct tipc_link *bc_sndlink,
	228	struct tipc_link *bc_rcvlink,
	229	struct sk_buff_head *inputq,
	230	struct sk_buff_head *namedq,
440d8963	231	struct tipc_link **link);
c72fa872	232	bool tipc_link_bc_create(struct net *net, u32 ownnode, u32 peer,
52666986 JPM	233	int mtu, int window, u16 peer_caps,
52666986 JPM	234	struct sk_buff_head *inputq,
32301906	235	struct sk_buff_head *namedq,
52666986	236	struct tipc_link *bc_sndlink,
32301906	237	struct tipc_link **link);
6e498158 JPM	238	void tipc_link_tnl_prepare(struct tipc_link l, struct tipc_link tnl,
6e498158 JPM	239	int mtyp, struct sk_buff_head *xmitq);
282b3a05	240	void tipc_link_build_reset_msg(struct tipc_link l, struct sk_buff_head xmitq);
662921cd	241	int tipc_link_fsm_evt(struct tipc_link *l, int evt);
a18c4bc3	242	void tipc_link_reset_fragments(struct tipc_link *l_ptr);
662921cd	243	bool tipc_link_is_up(struct tipc_link *l);
c8199300	244	bool tipc_link_peer_is_down(struct tipc_link *l);
662921cd	245	bool tipc_link_is_reset(struct tipc_link *l);
73f646ce	246	bool tipc_link_is_establishing(struct tipc_link *l);
662921cd JPM	247	bool tipc_link_is_synching(struct tipc_link *l);
	248	bool tipc_link_is_failingover(struct tipc_link *l);
	249	bool tipc_link_is_blocked(struct tipc_link *l);
c72fa872	250	void tipc_link_set_active(struct tipc_link *l, bool active);
a18c4bc3	251	void tipc_link_reset(struct tipc_link *l_ptr);
af9b028e JPM	252	int tipc_link_xmit(struct tipc_link link, struct sk_buff_head list,
af9b028e JPM	253	struct sk_buff_head *xmitq);
2af5ae37	254	void tipc_link_set_queue_limits(struct tipc_link *l, u32 window);
b97bf3fd	255
7be57fc6 RA	256	int tipc_nl_link_dump(struct sk_buff skb, struct netlink_callback cb);
7be57fc6 RA	257	int tipc_nl_link_get(struct sk_buff skb, struct genl_info info);
f96ce7a2	258	int tipc_nl_link_set(struct sk_buff skb, struct genl_info info);
ae36342b	259	int tipc_nl_link_reset_stats(struct sk_buff skb, struct genl_info info);
0655f6a8	260	int tipc_nl_parse_link_prop(struct nlattr prop, struct nlattr props[]);
333ef69e	261	int tipc_link_timeout(struct tipc_link l, struct sk_buff_head xmitq);
d999297c JPM	262	int tipc_link_rcv(struct tipc_link l, struct sk_buff skb,
d999297c JPM	263	struct sk_buff_head *xmitq);
52666986 JPM	264	int tipc_link_build_ack_msg(struct tipc_link l, struct sk_buff_head xmitq);
	265	void tipc_link_add_bc_peer(struct tipc_link *snd_l,
	266	struct tipc_link *uc_l,
	267	struct sk_buff_head *xmitq);
	268	void tipc_link_remove_bc_peer(struct tipc_link *snd_l,
	269	struct tipc_link *rcv_l,
	270	struct sk_buff_head *xmitq);
2f566124	271	int tipc_link_bc_peers(struct tipc_link *l);
959e1781 JPM	272	void tipc_link_set_mtu(struct tipc_link *l, int mtu);
959e1781 JPM	273	int tipc_link_mtu(struct tipc_link *l);
52666986 JPM	274	void tipc_link_bc_ack_rcv(struct tipc_link *l, u16 acked,
	275	struct sk_buff_head *xmitq);
	276	void tipc_link_build_bc_sync_msg(struct tipc_link *l,
	277	struct sk_buff_head *xmitq);
	278	void tipc_link_bc_init_rcv(struct tipc_link l, struct tipc_msg hdr);
	279	void tipc_link_bc_sync_rcv(struct tipc_link l, struct tipc_msg hdr,
	280	struct sk_buff_head *xmitq);
	281	int tipc_link_bc_nack_rcv(struct tipc_link l, struct sk_buff skb,
	282	struct sk_buff_head *xmitq);
b97bf3fd	283	#endif