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185d88f9 ED |
1 | /* |
2 | * Codel - The Controlled-Delay Active Queue Management algorithm | |
3 | * | |
4 | * Copyright (C) 2011-2012 Kathleen Nichols <nichols@pollere.com> | |
5 | * Copyright (C) 2011-2012 Van Jacobson <van@pollere.com> | |
6 | * Copyright (C) 2012 Michael D. Taht <dave.taht@bufferbloat.net> | |
df1c7d91 | 7 | * Copyright (C) 2012,2015 Eric Dumazet <edumazet@google.com> |
185d88f9 ED |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions, and the following disclaimer, | |
14 | * without modification. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * 3. The names of the authors may not be used to endorse or promote products | |
19 | * derived from this software without specific prior written permission. | |
20 | * | |
21 | * Alternatively, provided that this notice is retained in full, this | |
22 | * software may be distributed under the terms of the GNU General | |
23 | * Public License ("GPL") version 2, in which case the provisions of the | |
24 | * GPL apply INSTEAD OF those given above. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
27 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
28 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
29 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
30 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
31 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
32 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
33 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
34 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
35 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
36 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH | |
37 | * DAMAGE. | |
38 | * | |
39 | */ | |
40 | ||
41 | #include <stdio.h> | |
42 | #include <stdlib.h> | |
43 | #include <unistd.h> | |
185d88f9 ED |
44 | #include <fcntl.h> |
45 | #include <sys/socket.h> | |
46 | #include <netinet/in.h> | |
47 | #include <arpa/inet.h> | |
48 | #include <string.h> | |
49 | ||
50 | #include "utils.h" | |
51 | #include "tc_util.h" | |
52 | ||
53 | static void explain(void) | |
54 | { | |
8589eb4e MC |
55 | fprintf(stderr, |
56 | "Usage: ... codel [ limit PACKETS ] [ target TIME ]\n" | |
57 | " [ interval TIME ] [ ecn | noecn ]\n" | |
58 | " [ ce_threshold TIME ]\n"); | |
185d88f9 ED |
59 | } |
60 | ||
61 | static int codel_parse_opt(struct qdisc_util *qu, int argc, char **argv, | |
927e3cfb | 62 | struct nlmsghdr *n, const char *dev) |
185d88f9 | 63 | { |
32a121cb SH |
64 | unsigned int limit = 0; |
65 | unsigned int target = 0; | |
66 | unsigned int interval = 0; | |
67 | unsigned int ce_threshold = ~0U; | |
185d88f9 ED |
68 | int ecn = -1; |
69 | struct rtattr *tail; | |
70 | ||
71 | while (argc > 0) { | |
72 | if (strcmp(*argv, "limit") == 0) { | |
73 | NEXT_ARG(); | |
74 | if (get_unsigned(&limit, *argv, 0)) { | |
75 | fprintf(stderr, "Illegal \"limit\"\n"); | |
76 | return -1; | |
77 | } | |
78 | } else if (strcmp(*argv, "target") == 0) { | |
79 | NEXT_ARG(); | |
80 | if (get_time(&target, *argv)) { | |
81 | fprintf(stderr, "Illegal \"target\"\n"); | |
82 | return -1; | |
83 | } | |
df1c7d91 ED |
84 | } else if (strcmp(*argv, "ce_threshold") == 0) { |
85 | NEXT_ARG(); | |
86 | if (get_time(&ce_threshold, *argv)) { | |
87 | fprintf(stderr, "Illegal \"ce_threshold\"\n"); | |
88 | return -1; | |
89 | } | |
185d88f9 ED |
90 | } else if (strcmp(*argv, "interval") == 0) { |
91 | NEXT_ARG(); | |
92 | if (get_time(&interval, *argv)) { | |
93 | fprintf(stderr, "Illegal \"interval\"\n"); | |
94 | return -1; | |
95 | } | |
96 | } else if (strcmp(*argv, "ecn") == 0) { | |
97 | ecn = 1; | |
98 | } else if (strcmp(*argv, "noecn") == 0) { | |
99 | ecn = 0; | |
100 | } else if (strcmp(*argv, "help") == 0) { | |
101 | explain(); | |
102 | return -1; | |
103 | } else { | |
104 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
105 | explain(); | |
106 | return -1; | |
107 | } | |
108 | argc--; argv++; | |
109 | } | |
110 | ||
c14f9d92 | 111 | tail = addattr_nest(n, 1024, TCA_OPTIONS); |
185d88f9 ED |
112 | if (limit) |
113 | addattr_l(n, 1024, TCA_CODEL_LIMIT, &limit, sizeof(limit)); | |
114 | if (interval) | |
115 | addattr_l(n, 1024, TCA_CODEL_INTERVAL, &interval, sizeof(interval)); | |
116 | if (target) | |
117 | addattr_l(n, 1024, TCA_CODEL_TARGET, &target, sizeof(target)); | |
118 | if (ecn != -1) | |
119 | addattr_l(n, 1024, TCA_CODEL_ECN, &ecn, sizeof(ecn)); | |
df1c7d91 ED |
120 | if (ce_threshold != ~0U) |
121 | addattr_l(n, 1024, TCA_CODEL_CE_THRESHOLD, | |
122 | &ce_threshold, sizeof(ce_threshold)); | |
123 | ||
c14f9d92 | 124 | addattr_nest_end(n, tail); |
185d88f9 ED |
125 | return 0; |
126 | } | |
127 | ||
128 | static int codel_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
129 | { | |
130 | struct rtattr *tb[TCA_CODEL_MAX + 1]; | |
32a121cb SH |
131 | unsigned int limit; |
132 | unsigned int interval; | |
133 | unsigned int target; | |
134 | unsigned int ecn; | |
135 | unsigned int ce_threshold; | |
136 | ||
185d88f9 ED |
137 | SPRINT_BUF(b1); |
138 | ||
139 | if (opt == NULL) | |
140 | return 0; | |
141 | ||
142 | parse_rtattr_nested(tb, TCA_CODEL_MAX, opt); | |
143 | ||
144 | if (tb[TCA_CODEL_LIMIT] && | |
145 | RTA_PAYLOAD(tb[TCA_CODEL_LIMIT]) >= sizeof(__u32)) { | |
146 | limit = rta_getattr_u32(tb[TCA_CODEL_LIMIT]); | |
147 | fprintf(f, "limit %up ", limit); | |
148 | } | |
149 | if (tb[TCA_CODEL_TARGET] && | |
150 | RTA_PAYLOAD(tb[TCA_CODEL_TARGET]) >= sizeof(__u32)) { | |
151 | target = rta_getattr_u32(tb[TCA_CODEL_TARGET]); | |
152 | fprintf(f, "target %s ", sprint_time(target, b1)); | |
153 | } | |
df1c7d91 ED |
154 | if (tb[TCA_CODEL_CE_THRESHOLD] && |
155 | RTA_PAYLOAD(tb[TCA_CODEL_CE_THRESHOLD]) >= sizeof(__u32)) { | |
156 | ce_threshold = rta_getattr_u32(tb[TCA_CODEL_CE_THRESHOLD]); | |
157 | fprintf(f, "ce_threshold %s ", sprint_time(ce_threshold, b1)); | |
158 | } | |
185d88f9 ED |
159 | if (tb[TCA_CODEL_INTERVAL] && |
160 | RTA_PAYLOAD(tb[TCA_CODEL_INTERVAL]) >= sizeof(__u32)) { | |
161 | interval = rta_getattr_u32(tb[TCA_CODEL_INTERVAL]); | |
162 | fprintf(f, "interval %s ", sprint_time(interval, b1)); | |
163 | } | |
164 | if (tb[TCA_CODEL_ECN] && | |
165 | RTA_PAYLOAD(tb[TCA_CODEL_ECN]) >= sizeof(__u32)) { | |
166 | ecn = rta_getattr_u32(tb[TCA_CODEL_ECN]); | |
167 | if (ecn) | |
168 | fprintf(f, "ecn "); | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static int codel_print_xstats(struct qdisc_util *qu, FILE *f, | |
175 | struct rtattr *xstats) | |
176 | { | |
d17b136f | 177 | struct tc_codel_xstats _st = {}, *st; |
32a121cb | 178 | |
185d88f9 ED |
179 | SPRINT_BUF(b1); |
180 | ||
181 | if (xstats == NULL) | |
182 | return 0; | |
183 | ||
185d88f9 | 184 | st = RTA_DATA(xstats); |
df1c7d91 | 185 | if (RTA_PAYLOAD(xstats) < sizeof(*st)) { |
df1c7d91 ED |
186 | memcpy(&_st, st, RTA_PAYLOAD(xstats)); |
187 | st = &_st; | |
188 | } | |
189 | ||
185d88f9 ED |
190 | fprintf(f, " count %u lastcount %u ldelay %s", |
191 | st->count, st->lastcount, sprint_time(st->ldelay, b1)); | |
192 | if (st->dropping) | |
193 | fprintf(f, " dropping"); | |
194 | if (st->drop_next < 0) | |
195 | fprintf(f, " drop_next -%s", sprint_time(-st->drop_next, b1)); | |
196 | else | |
197 | fprintf(f, " drop_next %s", sprint_time(st->drop_next, b1)); | |
198 | fprintf(f, "\n maxpacket %u ecn_mark %u drop_overlimit %u", | |
199 | st->maxpacket, st->ecn_mark, st->drop_overlimit); | |
df1c7d91 ED |
200 | if (st->ce_mark) |
201 | fprintf(f, " ce_mark %u", st->ce_mark); | |
185d88f9 ED |
202 | return 0; |
203 | ||
204 | } | |
205 | ||
206 | struct qdisc_util codel_qdisc_util = { | |
207 | .id = "codel", | |
208 | .parse_qopt = codel_parse_opt, | |
209 | .print_qopt = codel_print_opt, | |
210 | .print_xstats = codel_print_xstats, | |
211 | }; |