mirror of https://gitee.com/openkylin/linux.git
74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
#ifndef __NET_SCHED_CODEL_QDISC_H
|
|
#define __NET_SCHED_CODEL_QDISC_H
|
|
|
|
/*
|
|
* Codel - The Controlled-Delay Active Queue Management algorithm
|
|
*
|
|
* Copyright (C) 2011-2012 Kathleen Nichols <nichols@pollere.com>
|
|
* Copyright (C) 2011-2012 Van Jacobson <van@pollere.net>
|
|
* Copyright (C) 2012 Michael D. Taht <dave.taht@bufferbloat.net>
|
|
* Copyright (C) 2012,2015 Eric Dumazet <edumazet@google.com>
|
|
*
|
|
* 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,
|
|
* without modification.
|
|
* 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. The names of the authors may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, provided that this notice is retained in full, this
|
|
* software may be distributed under the terms of the GNU General
|
|
* Public License ("GPL") version 2, in which case the provisions of the
|
|
* GPL apply INSTEAD OF those given above.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
/* Controlling Queue Delay (CoDel) algorithm
|
|
* =========================================
|
|
* Source : Kathleen Nichols and Van Jacobson
|
|
* http://queue.acm.org/detail.cfm?id=2209336
|
|
*
|
|
* Implemented on linux by Dave Taht and Eric Dumazet
|
|
*/
|
|
|
|
/* Qdiscs using codel plugin must use codel_skb_cb in their own cb[] */
|
|
struct codel_skb_cb {
|
|
codel_time_t enqueue_time;
|
|
};
|
|
|
|
static struct codel_skb_cb *get_codel_cb(const struct sk_buff *skb)
|
|
{
|
|
qdisc_cb_private_validate(skb, sizeof(struct codel_skb_cb));
|
|
return (struct codel_skb_cb *)qdisc_skb_cb(skb)->data;
|
|
}
|
|
|
|
static codel_time_t codel_get_enqueue_time(const struct sk_buff *skb)
|
|
{
|
|
return get_codel_cb(skb)->enqueue_time;
|
|
}
|
|
|
|
static void codel_set_enqueue_time(struct sk_buff *skb)
|
|
{
|
|
get_codel_cb(skb)->enqueue_time = codel_get_time();
|
|
}
|
|
|
|
#endif
|