/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Lutz Donnerhacke <lutz@donnerhacke.de>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR 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 AUTHOR 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 _NETGRAPH_QOS_H_
#define _NETGRAPH_QOS_H_
#include <sys/mbuf.h>
/* ABI cookie */
#define M_QOS_COOKIE 1571268051
#define MTAG_SIZE(X) ( sizeof(struct X) - sizeof(struct m_tag) )
/*
* Definition of types within this ABI:
* - Choose a type (16bit) by i.e. "echo $((1000+$(date +%s)%64536))"
* - Retry if the type is already in use
* - Define the structure for the type according to mbuf_tags(9)
* struct m_qos_foo {
* struct m_tag tag;
* ...
* };
* Preferred usage:
* struct m_qos_foo *p = (void *)m_tag_locate(m,
* M_QOS_COOKIE, M_QOS_FOO, ...);
* or
* p = (void *)m_tag_alloc(
* M_QOS_COOKIE, M_QOS_FOO, MTAG_SIZE(foo), ...);
m_tag_prepend(m, &p->tag);
*/
/* Color marking type */
#define M_QOS_COLOR 23568
/* Keep colors ordered semantically in order to allow use of "<=" or ">=" */
enum qos_color {
QOS_COLOR_GREEN,
QOS_COLOR_YELLOW,
QOS_COLOR_RED
};
struct m_qos_color {
struct m_tag tag;
enum qos_color color;
};
/*
* Priority class
*
* Processing per priority requires an overhead, which should
* be static (i.e. for alloctating queues) and small (for memory)
* So keep your chosen range limited.
*/
#define M_QOS_PRIORITY 28858
struct m_qos_priority {
struct m_tag tag;
uint8_t priority; /* 0 - lowest */
};
#endif /* _NETGRAPH_QOS_H_ */
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