1 #ifndef __NET_SCHED_CODEL_QDISC_H 1 #ifndef __NET_SCHED_CODEL_QDISC_H
2 #define __NET_SCHED_CODEL_QDISC_H 2 #define __NET_SCHED_CODEL_QDISC_H
3 3
4 /* 4 /*
5 * Codel - The Controlled-Delay Active Queue M 5 * Codel - The Controlled-Delay Active Queue Management algorithm
6 * 6 *
7 * Copyright (C) 2011-2012 Kathleen Nichols < 7 * Copyright (C) 2011-2012 Kathleen Nichols <nichols@pollere.com>
8 * Copyright (C) 2011-2012 Van Jacobson <van@ 8 * Copyright (C) 2011-2012 Van Jacobson <van@pollere.net>
9 * Copyright (C) 2012 Michael D. Taht <dave.t 9 * Copyright (C) 2012 Michael D. Taht <dave.taht@bufferbloat.net>
10 * Copyright (C) 2012,2015 Eric Dumazet <edum 10 * Copyright (C) 2012,2015 Eric Dumazet <edumazet@google.com>
11 * 11 *
12 * Redistribution and use in source and binary 12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that t 13 * modification, are permitted provided that the following conditions
14 * are met: 14 * are met:
15 * 1. Redistributions of source code must reta 15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the 16 * notice, this list of conditions, and the following disclaimer,
17 * without modification. 17 * without modification.
18 * 2. Redistributions in binary form must repr 18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the 19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials pro 20 * documentation and/or other materials provided with the distribution.
21 * 3. The names of the authors may not be used 21 * 3. The names of the authors may not be used to endorse or promote products
22 * derived from this software without speci 22 * derived from this software without specific prior written permission.
23 * 23 *
24 * Alternatively, provided that this notice is 24 * Alternatively, provided that this notice is retained in full, this
25 * software may be distributed under the terms 25 * software may be distributed under the terms of the GNU General
26 * Public License ("GPL") version 2, in which 26 * Public License ("GPL") version 2, in which case the provisions of the
27 * GPL apply INSTEAD OF those given above. 27 * GPL apply INSTEAD OF those given above.
28 * 28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTI 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCH 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIR 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGE 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, S 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE PO 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
40 * DAMAGE. 40 * DAMAGE.
41 * 41 *
42 */ 42 */
43 43
44 /* Controlling Queue Delay (CoDel) algorithm 44 /* Controlling Queue Delay (CoDel) algorithm
45 * ========================================= 45 * =========================================
46 * Source : Kathleen Nichols and Van Jacobson 46 * Source : Kathleen Nichols and Van Jacobson
47 * http://queue.acm.org/detail.cfm?id=2209336 47 * http://queue.acm.org/detail.cfm?id=2209336
48 * 48 *
49 * Implemented on linux by Dave Taht and Eric 49 * Implemented on linux by Dave Taht and Eric Dumazet
50 */ 50 */
51 51
52 #include <net/codel.h> 52 #include <net/codel.h>
53 #include <net/pkt_sched.h> 53 #include <net/pkt_sched.h>
54 54
55 /* Qdiscs using codel plugin must use codel_sk 55 /* Qdiscs using codel plugin must use codel_skb_cb in their own cb[] */
56 struct codel_skb_cb { 56 struct codel_skb_cb {
57 codel_time_t enqueue_time; 57 codel_time_t enqueue_time;
58 unsigned int mem_usage; 58 unsigned int mem_usage;
59 }; 59 };
60 60
61 static struct codel_skb_cb *get_codel_cb(const 61 static struct codel_skb_cb *get_codel_cb(const struct sk_buff *skb)
62 { 62 {
63 qdisc_cb_private_validate(skb, sizeof( 63 qdisc_cb_private_validate(skb, sizeof(struct codel_skb_cb));
64 return (struct codel_skb_cb *)qdisc_sk 64 return (struct codel_skb_cb *)qdisc_skb_cb(skb)->data;
65 } 65 }
66 66
67 static codel_time_t codel_get_enqueue_time(con 67 static codel_time_t codel_get_enqueue_time(const struct sk_buff *skb)
68 { 68 {
69 return get_codel_cb(skb)->enqueue_time 69 return get_codel_cb(skb)->enqueue_time;
70 } 70 }
71 71
72 static void codel_set_enqueue_time(struct sk_b 72 static void codel_set_enqueue_time(struct sk_buff *skb)
73 { 73 {
74 get_codel_cb(skb)->enqueue_time = code 74 get_codel_cb(skb)->enqueue_time = codel_get_time();
75 } 75 }
76 76
77 #endif 77 #endif
78 78
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