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Diffstat (limited to 'net/tipc/link.h')
| -rw-r--r-- | net/tipc/link.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/net/tipc/link.h b/net/tipc/link.h new file mode 100644 index 000000000..d80f5649b --- /dev/null +++ b/net/tipc/link.h @@ -0,0 +1,158 @@ +/* + * 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 |