forked from Minki/linux
d12d2e12ce
When a socket is joining a group, we look up in the binding table to
find if there are already other members of the group present. This is
used for being able to return EAGAIN instead of EHOSTUNREACH if the
user proceeds directly to a send attempt.
However, the information in the binding table can be used to directly
set the created member in state MBR_PUBLISHED and send a JOIN message
to the peer, instead of waiting for a topology PUBLISH event to do this.
When there are many members in a group, the propagation time for such
events can be significant, and we can save time during the join
operation if we use the initial lookup result fully.
In this commit, we eliminate the member state MBR_DISCOVERED which has
been the result of the initial lookup, and do instead go directly to
MBR_PUBLISHED, which initiates the setup.
After this change, the tipc_member FSM looks as follows:
+-----------+
---->| PUBLISHED |-----------------------------------------------+
PUB- +-----------+ LEAVE/WITHRAW |
LISH |JOIN |
| +-------------------------------------------+ |
| | LEAVE/WITHDRAW | |
| | +------------+ | |
| | +----------->| PENDING |---------+ | |
| | |msg/maxactv +-+---+------+ LEAVE/ | | |
| | | | | WITHDRAW | | |
| | | +----------+ | | | |
| | | |revert/maxactv| | | |
| | | V V V V V
| +----------+ msg +------------+ +-----------+
+-->| JOINED |------>| ACTIVE |------>| LEAVING |--->
| +----------+ +--- -+------+ LEAVE/+-----------+DOWN
| A A | WITHDRAW A A A EVT
| | | |RECLAIM | | |
| | |REMIT V | | |
| | |== adv +------------+ | | |
| | +---------| RECLAIMING |--------+ | |
| | +-----+------+ LEAVE/ | |
| | |REMIT WITHDRAW | |
| | |< adv | |
| |msg/ V LEAVE/ | |
| |adv==ADV_IDLE+------------+ WITHDRAW | |
| +-------------| REMITTED |------------+ |
| +------------+ |
|PUBLISH |
JOIN +-----------+ LEAVE/WITHDRAW |
---->| JOINING |-----------------------------------------------+
+-----------+
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
76 lines
3.4 KiB
C
76 lines
3.4 KiB
C
/*
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* net/tipc/group.h: Include file for TIPC group unicast/multicast functions
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*
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* Copyright (c) 2017, Ericsson AB
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TIPC_GROUP_H
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#define _TIPC_GROUP_H
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#include "core.h"
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struct tipc_group;
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struct tipc_member;
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struct tipc_msg;
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struct tipc_group *tipc_group_create(struct net *net, u32 portid,
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struct tipc_group_req *mreq);
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void tipc_group_join(struct net *net, struct tipc_group *grp, int *sk_rcv_buf);
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void tipc_group_delete(struct net *net, struct tipc_group *grp);
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void tipc_group_add_member(struct tipc_group *grp, u32 node,
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u32 port, u32 instance);
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struct tipc_nlist *tipc_group_dests(struct tipc_group *grp);
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void tipc_group_self(struct tipc_group *grp, struct tipc_name_seq *seq,
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int *scope);
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u32 tipc_group_exclude(struct tipc_group *grp);
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void tipc_group_filter_msg(struct tipc_group *grp,
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struct sk_buff_head *inputq,
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struct sk_buff_head *xmitq);
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void tipc_group_member_evt(struct tipc_group *grp, bool *wakeup,
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int *sk_rcvbuf, struct tipc_msg *hdr,
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struct sk_buff_head *inputq,
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struct sk_buff_head *xmitq);
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void tipc_group_proto_rcv(struct tipc_group *grp, bool *wakeup,
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struct tipc_msg *hdr,
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struct sk_buff_head *inputq,
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struct sk_buff_head *xmitq);
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void tipc_group_update_bc_members(struct tipc_group *grp, int len, bool ack);
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bool tipc_group_cong(struct tipc_group *grp, u32 dnode, u32 dport,
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int len, struct tipc_member **m);
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bool tipc_group_bc_cong(struct tipc_group *grp, int len);
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void tipc_group_update_rcv_win(struct tipc_group *grp, int blks, u32 node,
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u32 port, struct sk_buff_head *xmitq);
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u16 tipc_group_bc_snd_nxt(struct tipc_group *grp);
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void tipc_group_update_member(struct tipc_member *m, int len);
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int tipc_group_size(struct tipc_group *grp);
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#endif
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