1 #ifndef __NET_SCHED_CODEL_QDISC_H 1
2 #define __NET_SCHED_CODEL_QDISC_H
3
4 /*
5 * Codel - The Controlled-Delay Active Queue M
6 *
7 * Copyright (C) 2011-2012 Kathleen Nichols <
8 * Copyright (C) 2011-2012 Van Jacobson <van@
9 * Copyright (C) 2012 Michael D. Taht <dave.t
10 * Copyright (C) 2012,2015 Eric Dumazet <edum
11 *
12 * Redistribution and use in source and binary
13 * modification, are permitted provided that t
14 * are met:
15 * 1. Redistributions of source code must reta
16 * notice, this list of conditions, and the
17 * without modification.
18 * 2. Redistributions in binary form must repr
19 * notice, this list of conditions and the
20 * documentation and/or other materials pro
21 * 3. The names of the authors may not be used
22 * derived from this software without speci
23 *
24 * Alternatively, provided that this notice is
25 * software may be distributed under the terms
26 * Public License ("GPL") version 2, in which
27 * GPL apply INSTEAD OF those given above.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTI
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCH
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIR
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGE
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, S
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE PO
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
50 */
51
52 #include <net/codel.h>
53 #include <net/pkt_sched.h>
54
55 /* Qdiscs using codel plugin must use codel_sk
56 struct codel_skb_cb {
57 codel_time_t enqueue_time;
58 unsigned int mem_usage;
59 };
60
61 static struct codel_skb_cb *get_codel_cb(const
62 {
63 qdisc_cb_private_validate(skb, sizeof(
64 return (struct codel_skb_cb *)qdisc_sk
65 }
66
67 static codel_time_t codel_get_enqueue_time(con
68 {
69 return get_codel_cb(skb)->enqueue_time
70 }
71
72 static void codel_set_enqueue_time(struct sk_b
73 {
74 get_codel_cb(skb)->enqueue_time = code
75 }
76
77 #endif
78
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