| /* | |
| * 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 */ | |
| /* 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_STATE = (1 << 2) | |
| }; | |
| /* Starting value for maximum packet size negotiation on unicast links | |
| * (unless bearer MTU is less) | |
| */ | |
| #define MAX_PKT_DEFAULT 1500 | |
| bool tipc_link_create(struct net *net, char *if_name, int bearer_id, | |
| int tolerance, char net_plane, u32 mtu, int priority, | |
| u32 min_win, u32 max_win, u32 session, u32 ownnode, | |
| u32 peer, u8 *peer_id, 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, u8 *peer_id, | |
| int mtu, u32 min_win, u32 max_win, 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_create_dummy_tnl_msg(struct tipc_link *tnl, | |
| struct sk_buff_head *xmitq); | |
| void tipc_link_failover_prepare(struct tipc_link *l, struct tipc_link *tnl, | |
| 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); | |
| 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); | |
| void tipc_link_reset_stats(struct tipc_link *l); | |
| int tipc_link_xmit(struct tipc_link *link, struct sk_buff_head *list, | |
| struct sk_buff_head *xmitq); | |
| struct sk_buff_head *tipc_link_inputq(struct tipc_link *l); | |
| u16 tipc_link_rcv_nxt(struct tipc_link *l); | |
| u16 tipc_link_acked(struct tipc_link *l); | |
| u32 tipc_link_id(struct tipc_link *l); | |
| char *tipc_link_name(struct tipc_link *l); | |
| u32 tipc_link_state(struct tipc_link *l); | |
| char tipc_link_plane(struct tipc_link *l); | |
| int tipc_link_prio(struct tipc_link *l); | |
| int tipc_link_min_win(struct tipc_link *l); | |
| int tipc_link_max_win(struct tipc_link *l); | |
| void tipc_link_update_caps(struct tipc_link *l, u16 capabilities); | |
| bool tipc_link_validate_msg(struct tipc_link *l, struct tipc_msg *hdr); | |
| unsigned long tipc_link_tolerance(struct tipc_link *l); | |
| void tipc_link_set_tolerance(struct tipc_link *l, u32 tol, | |
| struct sk_buff_head *xmitq); | |
| void tipc_link_set_prio(struct tipc_link *l, u32 prio, | |
| struct sk_buff_head *xmitq); | |
| void tipc_link_set_abort_limit(struct tipc_link *l, u32 limit); | |
| void tipc_link_set_queue_limits(struct tipc_link *l, u32 min_win, u32 max_win); | |
| int __tipc_nl_add_link(struct net *net, struct tipc_nl_msg *msg, | |
| struct tipc_link *link, int nlflags); | |
| 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_state_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); | |
| int tipc_link_mss(struct tipc_link *l); | |
| u16 tipc_get_gap_ack_blks(struct tipc_gap_ack_blks **ga, struct tipc_link *l, | |
| struct tipc_msg *hdr, bool uc); | |
| int tipc_link_bc_ack_rcv(struct tipc_link *l, u16 acked, u16 gap, | |
| struct tipc_gap_ack_blks *ga, | |
| struct sk_buff_head *xmitq, | |
| struct sk_buff_head *retrq); | |
| void tipc_link_bc_init_rcv(struct tipc_link *l, struct tipc_msg *hdr); | |
| int 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); | |
| bool tipc_link_too_silent(struct tipc_link *l); | |
| struct net *tipc_link_net(struct tipc_link *l); | |
| #endif |