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8fa7732f5d
Vectored writes are more efficient with a higher quantum. Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/* BGP I/O.
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* Implements packet I/O in a pthread.
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* Copyright (C) 2017 Cumulus Networks
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* Quentin Young
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#ifndef _FRR_BGP_IO_H
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#define _FRR_BGP_IO_H
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#define BGP_WRITE_PACKET_MAX 64U
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#define BGP_READ_PACKET_MAX 10U
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#include "bgpd/bgpd.h"
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#include "frr_pthread.h"
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/**
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* Start function for write thread.
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*
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* @param arg - unused
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*/
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extern void *bgp_io_start(void *arg);
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/**
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* Start function for write thread.
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*
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* Uninitializes all resources and stops the thread.
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*
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* @param result - where to store data result, unused
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*/
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extern int bgp_io_stop(void **result, struct frr_pthread *fpt);
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/**
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* Turns on packet writing for a peer.
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*
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* After this function is called, any packets placed on peer->obuf will be
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* written to peer->fd until no more packets remain.
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*
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* Additionally, it becomes unsafe to perform socket actions on peer->fd.
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*
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* @param peer - peer to register
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*/
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extern void bgp_writes_on(struct peer *peer);
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/**
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* Turns off packet writing for a peer.
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*
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* After this function returns, packets placed on peer->obuf will not be
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* written to peer->fd by the I/O thread.
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*
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* After this function returns it becomes safe to perform socket actions on
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* peer->fd.
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*
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* @param peer - peer to deregister
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* @param flush - as described
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*/
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extern void bgp_writes_off(struct peer *peer);
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/**
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* Turns on packet reading for a peer.
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*
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* After this function is called, any packets received on peer->fd will be read
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* and copied into the FIFO queue peer->ibuf.
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*
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* Additionally, it becomes unsafe to perform socket actions on peer->fd.
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*
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* Whenever one or more packets are placed onto peer->ibuf, a task of type
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* THREAD_EVENT will be placed on the main thread whose handler is
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*
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* bgp_packet.c:bgp_process_packet()
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*
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* @param peer - peer to register
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*/
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extern void bgp_reads_on(struct peer *peer);
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/**
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* Turns off packet reading for a peer.
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*
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* After this function is called, any packets received on peer->fd will not be
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* read by the I/O thread.
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*
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* After this function returns it becomes safe to perform socket actions on
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* peer->fd.
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*
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* @param peer - peer to deregister
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*/
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extern void bgp_reads_off(struct peer *peer);
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#endif /* _FRR_BGP_IO_H */
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