| #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 | |
| */ | |
| #include <net/codel.h> | |
| #include <net/pkt_sched.h> | |
| /* Qdiscs using codel plugin must use codel_skb_cb in their own cb[] */ | |
| struct codel_skb_cb { | |
| codel_time_t enqueue_time; | |
| unsigned int mem_usage; | |
| }; | |
| 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 |