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TOMOYO Linux Cross Reference
Linux/net/tipc/link.h

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  1 /*
  2  * net/tipc/link.h: Include file for TIPC link code
  3  *
  4  * Copyright (c) 1995-2006, 2013-2014, Ericsson AB
  5  * Copyright (c) 2004-2005, 2010-2011, Wind River Systems
  6  * All rights reserved.
  7  *
  8  * Redistribution and use in source and binary forms, with or without
  9  * modification, are permitted provided that the following conditions are met:
 10  *
 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.
 19  *
 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
 34  * POSSIBILITY OF SUCH DAMAGE.
 35  */
 36 
 37 #ifndef _TIPC_LINK_H
 38 #define _TIPC_LINK_H
 39 
 40 #include <net/genetlink.h>
 41 #include "msg.h"
 42 #include "node.h"
 43 
 44 /* TIPC-specific error codes
 45 */
 46 #define ELINKCONG EAGAIN        /* link congestion <=> resource unavailable */
 47 
 48 /* Link FSM events:
 49  */
 50 enum {
 51         LINK_ESTABLISH_EVT       = 0xec1ab1e,
 52         LINK_PEER_RESET_EVT      = 0x9eed0e,
 53         LINK_FAILURE_EVT         = 0xfa110e,
 54         LINK_RESET_EVT           = 0x10ca1d0e,
 55         LINK_FAILOVER_BEGIN_EVT  = 0xfa110bee,
 56         LINK_FAILOVER_END_EVT    = 0xfa110ede,
 57         LINK_SYNCH_BEGIN_EVT     = 0xc1ccbee,
 58         LINK_SYNCH_END_EVT       = 0xc1ccede
 59 };
 60 
 61 /* Events returned from link at packet reception or at timeout
 62  */
 63 enum {
 64         TIPC_LINK_UP_EVT       = 1,
 65         TIPC_LINK_DOWN_EVT     = (1 << 1),
 66         TIPC_LINK_SND_STATE    = (1 << 2)
 67 };
 68 
 69 /* Starting value for maximum packet size negotiation on unicast links
 70  * (unless bearer MTU is less)
 71  */
 72 #define MAX_PKT_DEFAULT 1500
 73 
 74 bool tipc_link_create(struct net *net, char *if_name, int bearer_id,
 75                       int tolerance, char net_plane, u32 mtu, int priority,
 76                       u32 min_win, u32 max_win, u32 session, u32 ownnode,
 77                       u32 peer, u8 *peer_id, u16 peer_caps,
 78                       struct tipc_link *bc_sndlink,
 79                       struct tipc_link *bc_rcvlink,
 80                       struct sk_buff_head *inputq,
 81                       struct sk_buff_head *namedq,
 82                       struct tipc_link **link);
 83 bool tipc_link_bc_create(struct net *net, u32 ownnode, u32 peer, u8 *peer_id,
 84                          int mtu, u32 min_win, u32 max_win, u16 peer_caps,
 85                          struct sk_buff_head *inputq,
 86                          struct sk_buff_head *namedq,
 87                          struct tipc_link *bc_sndlink,
 88                          struct tipc_link **link);
 89 void tipc_link_tnl_prepare(struct tipc_link *l, struct tipc_link *tnl,
 90                            int mtyp, struct sk_buff_head *xmitq);
 91 void tipc_link_create_dummy_tnl_msg(struct tipc_link *tnl,
 92                                     struct sk_buff_head *xmitq);
 93 void tipc_link_failover_prepare(struct tipc_link *l, struct tipc_link *tnl,
 94                                 struct sk_buff_head *xmitq);
 95 void tipc_link_build_reset_msg(struct tipc_link *l, struct sk_buff_head *xmitq);
 96 int tipc_link_fsm_evt(struct tipc_link *l, int evt);
 97 bool tipc_link_is_up(struct tipc_link *l);
 98 bool tipc_link_peer_is_down(struct tipc_link *l);
 99 bool tipc_link_is_reset(struct tipc_link *l);
100 bool tipc_link_is_establishing(struct tipc_link *l);
101 bool tipc_link_is_synching(struct tipc_link *l);
102 bool tipc_link_is_failingover(struct tipc_link *l);
103 bool tipc_link_is_blocked(struct tipc_link *l);
104 void tipc_link_set_active(struct tipc_link *l, bool active);
105 void tipc_link_reset(struct tipc_link *l);
106 void tipc_link_reset_stats(struct tipc_link *l);
107 int tipc_link_xmit(struct tipc_link *link, struct sk_buff_head *list,
108                    struct sk_buff_head *xmitq);
109 struct sk_buff_head *tipc_link_inputq(struct tipc_link *l);
110 u16 tipc_link_rcv_nxt(struct tipc_link *l);
111 u16 tipc_link_acked(struct tipc_link *l);
112 u32 tipc_link_id(struct tipc_link *l);
113 char *tipc_link_name(struct tipc_link *l);
114 u32 tipc_link_state(struct tipc_link *l);
115 char tipc_link_plane(struct tipc_link *l);
116 int tipc_link_prio(struct tipc_link *l);
117 int tipc_link_min_win(struct tipc_link *l);
118 int tipc_link_max_win(struct tipc_link *l);
119 void tipc_link_update_caps(struct tipc_link *l, u16 capabilities);
120 bool tipc_link_validate_msg(struct tipc_link *l, struct tipc_msg *hdr);
121 unsigned long tipc_link_tolerance(struct tipc_link *l);
122 void tipc_link_set_tolerance(struct tipc_link *l, u32 tol,
123                              struct sk_buff_head *xmitq);
124 void tipc_link_set_prio(struct tipc_link *l, u32 prio,
125                         struct sk_buff_head *xmitq);
126 void tipc_link_set_abort_limit(struct tipc_link *l, u32 limit);
127 void tipc_link_set_queue_limits(struct tipc_link *l, u32 min_win, u32 max_win);
128 int __tipc_nl_add_link(struct net *net, struct tipc_nl_msg *msg,
129                        struct tipc_link *link, int nlflags);
130 int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]);
131 int tipc_link_timeout(struct tipc_link *l, struct sk_buff_head *xmitq);
132 int tipc_link_rcv(struct tipc_link *l, struct sk_buff *skb,
133                   struct sk_buff_head *xmitq);
134 int tipc_link_build_state_msg(struct tipc_link *l, struct sk_buff_head *xmitq);
135 void tipc_link_add_bc_peer(struct tipc_link *snd_l,
136                            struct tipc_link *uc_l,
137                            struct sk_buff_head *xmitq);
138 void tipc_link_remove_bc_peer(struct tipc_link *snd_l,
139                               struct tipc_link *rcv_l,
140                               struct sk_buff_head *xmitq);
141 int tipc_link_bc_peers(struct tipc_link *l);
142 void tipc_link_set_mtu(struct tipc_link *l, int mtu);
143 int tipc_link_mtu(struct tipc_link *l);
144 int tipc_link_mss(struct tipc_link *l);
145 u16 tipc_get_gap_ack_blks(struct tipc_gap_ack_blks **ga, struct tipc_link *l,
146                           struct tipc_msg *hdr, bool uc);
147 int tipc_link_bc_ack_rcv(struct tipc_link *l, u16 acked, u16 gap,
148                          struct tipc_gap_ack_blks *ga,
149                          struct sk_buff_head *xmitq,
150                          struct sk_buff_head *retrq);
151 void tipc_link_bc_init_rcv(struct tipc_link *l, struct tipc_msg *hdr);
152 int tipc_link_bc_sync_rcv(struct tipc_link *l,   struct tipc_msg *hdr,
153                           struct sk_buff_head *xmitq);
154 int tipc_link_bc_nack_rcv(struct tipc_link *l, struct sk_buff *skb,
155                           struct sk_buff_head *xmitq);
156 bool tipc_link_too_silent(struct tipc_link *l);
157 struct net *tipc_link_net(struct tipc_link *l);
158 #endif
159 

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