cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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codel_qdisc.h (3001B)

      1#ifndef __NET_SCHED_CODEL_QDISC_H
      2#define __NET_SCHED_CODEL_QDISC_H
      3
      4/*
      5 * Codel - The Controlled-Delay Active Queue Management algorithm
      6 *
      7 *  Copyright (C) 2011-2012 Kathleen Nichols <nichols@pollere.com>
      8 *  Copyright (C) 2011-2012 Van Jacobson <van@pollere.net>
      9 *  Copyright (C) 2012 Michael D. Taht <dave.taht@bufferbloat.net>
     10 *  Copyright (C) 2012,2015 Eric Dumazet <edumazet@google.com>
     11 *
     12 * Redistribution and use in source and binary forms, with or without
     13 * modification, are permitted provided that the following conditions
     14 * are met:
     15 * 1. Redistributions of source code must retain the above copyright
     16 *    notice, this list of conditions, and the following disclaimer,
     17 *    without modification.
     18 * 2. Redistributions in binary form must reproduce the above copyright
     19 *    notice, this list of conditions and the following disclaimer in the
     20 *    documentation and/or other materials provided with the distribution.
     21 * 3. The names of the authors may not be used to endorse or promote products
     22 *    derived from this software without specific prior written permission.
     23 *
     24 * Alternatively, provided that this notice is retained in full, this
     25 * software may be distributed under the terms of the GNU General
     26 * Public License ("GPL") version 2, in which case the provisions of the
     27 * GPL apply INSTEAD OF those given above.
     28 *
     29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
     40 * DAMAGE.
     41 *
     42 */
     43
     44/* Controlling Queue Delay (CoDel) algorithm
     45 * =========================================
     46 * Source : Kathleen Nichols and Van Jacobson
     47 * http://queue.acm.org/detail.cfm?id=2209336
     48 *
     49 * Implemented on linux by Dave Taht and Eric Dumazet
     50 */
     51
     52#include <net/pkt_sched.h>
     53
     54/* Qdiscs using codel plugin must use codel_skb_cb in their own cb[] */
     55struct codel_skb_cb {
     56	codel_time_t enqueue_time;
     57	unsigned int mem_usage;
     58};
     59
     60static struct codel_skb_cb *get_codel_cb(const struct sk_buff *skb)
     61{
     62	qdisc_cb_private_validate(skb, sizeof(struct codel_skb_cb));
     63	return (struct codel_skb_cb *)qdisc_skb_cb(skb)->data;
     64}
     65
     66static codel_time_t codel_get_enqueue_time(const struct sk_buff *skb)
     67{
     68	return get_codel_cb(skb)->enqueue_time;
     69}
     70
     71static void codel_set_enqueue_time(struct sk_buff *skb)
     72{
     73	get_codel_cb(skb)->enqueue_time = codel_get_time();
     74}
     75
     76#endif