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1 | /* |
2 | * Fair Queue Codel | |
3 | * | |
4 | * Copyright (C) 2012 Eric Dumazet <edumazet@google.com> | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions, and the following disclaimer, | |
11 | * without modification. | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * 3. The names of the authors may not be used to endorse or promote products | |
16 | * derived from this software without specific prior written permission. | |
17 | * | |
18 | * Alternatively, provided that this notice is retained in full, this | |
19 | * software may be distributed under the terms of the GNU General | |
20 | * Public License ("GPL") version 2, in which case the provisions of the | |
21 | * GPL apply INSTEAD OF those given above. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
24 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
25 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
26 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
27 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
28 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
29 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
30 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
31 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
32 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
33 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH | |
34 | * DAMAGE. | |
35 | * | |
36 | */ | |
37 | ||
38 | #include <stdio.h> | |
39 | #include <stdlib.h> | |
40 | #include <unistd.h> | |
41 | #include <syslog.h> | |
42 | #include <fcntl.h> | |
43 | #include <sys/socket.h> | |
44 | #include <netinet/in.h> | |
45 | #include <arpa/inet.h> | |
46 | #include <string.h> | |
47 | ||
48 | #include "utils.h" | |
49 | #include "tc_util.h" | |
50 | ||
51 | static void explain(void) | |
52 | { | |
53 | fprintf(stderr, "Usage: ... fq_codel [ limit PACKETS ] [ flows NUMBER ]\n"); | |
54 | fprintf(stderr, " [ target TIME] [ interval TIME ]\n"); | |
55 | fprintf(stderr, " [ quantum BYTES ] [ [no]ecn ]\n"); | |
56 | } | |
57 | ||
58 | static int fq_codel_parse_opt(struct qdisc_util *qu, int argc, char **argv, | |
59 | struct nlmsghdr *n) | |
60 | { | |
61 | unsigned limit = 0; | |
62 | unsigned flows = 0; | |
63 | unsigned target = 0; | |
64 | unsigned interval = 0; | |
65 | unsigned quantum = 0; | |
66 | int ecn = -1; | |
67 | struct rtattr *tail; | |
68 | ||
69 | while (argc > 0) { | |
70 | if (strcmp(*argv, "limit") == 0) { | |
71 | NEXT_ARG(); | |
72 | if (get_unsigned(&limit, *argv, 0)) { | |
73 | fprintf(stderr, "Illegal \"limit\"\n"); | |
74 | return -1; | |
75 | } | |
76 | } else if (strcmp(*argv, "flows") == 0) { | |
77 | NEXT_ARG(); | |
78 | if (get_unsigned(&flows, *argv, 0)) { | |
79 | fprintf(stderr, "Illegal \"flows\"\n"); | |
80 | return -1; | |
81 | } | |
82 | } else if (strcmp(*argv, "quantum") == 0) { | |
83 | NEXT_ARG(); | |
84 | if (get_unsigned(&quantum, *argv, 0)) { | |
85 | fprintf(stderr, "Illegal \"quantum\"\n"); | |
86 | return -1; | |
87 | } | |
88 | } else if (strcmp(*argv, "target") == 0) { | |
89 | NEXT_ARG(); | |
90 | if (get_time(&target, *argv)) { | |
91 | fprintf(stderr, "Illegal \"target\"\n"); | |
92 | return -1; | |
93 | } | |
94 | } else if (strcmp(*argv, "interval") == 0) { | |
95 | NEXT_ARG(); | |
96 | if (get_time(&interval, *argv)) { | |
97 | fprintf(stderr, "Illegal \"interval\"\n"); | |
98 | return -1; | |
99 | } | |
100 | } else if (strcmp(*argv, "ecn") == 0) { | |
101 | ecn = 1; | |
102 | } else if (strcmp(*argv, "noecn") == 0) { | |
103 | ecn = 0; | |
104 | } else if (strcmp(*argv, "help") == 0) { | |
105 | explain(); | |
106 | return -1; | |
107 | } else { | |
108 | fprintf(stderr, "What is \"%s\"?\n", *argv); | |
109 | explain(); | |
110 | return -1; | |
111 | } | |
112 | argc--; argv++; | |
113 | } | |
114 | ||
115 | tail = NLMSG_TAIL(n); | |
116 | addattr_l(n, 1024, TCA_OPTIONS, NULL, 0); | |
117 | if (limit) | |
118 | addattr_l(n, 1024, TCA_FQ_CODEL_LIMIT, &limit, sizeof(limit)); | |
119 | if (flows) | |
120 | addattr_l(n, 1024, TCA_FQ_CODEL_FLOWS, &flows, sizeof(flows)); | |
121 | if (quantum) | |
122 | addattr_l(n, 1024, TCA_FQ_CODEL_QUANTUM, &quantum, sizeof(quantum)); | |
123 | if (interval) | |
124 | addattr_l(n, 1024, TCA_FQ_CODEL_INTERVAL, &interval, sizeof(interval)); | |
125 | if (target) | |
126 | addattr_l(n, 1024, TCA_FQ_CODEL_TARGET, &target, sizeof(target)); | |
127 | if (ecn != -1) | |
128 | addattr_l(n, 1024, TCA_FQ_CODEL_ECN, &ecn, sizeof(ecn)); | |
129 | tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail; | |
130 | return 0; | |
131 | } | |
132 | ||
133 | static int fq_codel_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt) | |
134 | { | |
135 | struct rtattr *tb[TCA_FQ_CODEL_MAX + 1]; | |
136 | unsigned limit; | |
137 | unsigned flows; | |
138 | unsigned interval; | |
139 | unsigned target; | |
140 | unsigned ecn; | |
141 | unsigned quantum; | |
142 | SPRINT_BUF(b1); | |
143 | ||
144 | if (opt == NULL) | |
145 | return 0; | |
146 | ||
147 | parse_rtattr_nested(tb, TCA_FQ_CODEL_MAX, opt); | |
148 | ||
149 | if (tb[TCA_FQ_CODEL_LIMIT] && | |
150 | RTA_PAYLOAD(tb[TCA_FQ_CODEL_LIMIT]) >= sizeof(__u32)) { | |
151 | limit = rta_getattr_u32(tb[TCA_FQ_CODEL_LIMIT]); | |
152 | fprintf(f, "limit %up ", limit); | |
153 | } | |
154 | if (tb[TCA_FQ_CODEL_FLOWS] && | |
155 | RTA_PAYLOAD(tb[TCA_FQ_CODEL_FLOWS]) >= sizeof(__u32)) { | |
156 | flows = rta_getattr_u32(tb[TCA_FQ_CODEL_FLOWS]); | |
157 | fprintf(f, "flows %u ", flows); | |
158 | } | |
159 | if (tb[TCA_FQ_CODEL_QUANTUM] && | |
160 | RTA_PAYLOAD(tb[TCA_FQ_CODEL_QUANTUM]) >= sizeof(__u32)) { | |
161 | quantum = rta_getattr_u32(tb[TCA_FQ_CODEL_QUANTUM]); | |
162 | fprintf(f, "quantum %u ", quantum); | |
163 | } | |
164 | if (tb[TCA_FQ_CODEL_TARGET] && | |
165 | RTA_PAYLOAD(tb[TCA_FQ_CODEL_TARGET]) >= sizeof(__u32)) { | |
166 | target = rta_getattr_u32(tb[TCA_FQ_CODEL_TARGET]); | |
167 | fprintf(f, "target %s ", sprint_time(target, b1)); | |
168 | } | |
169 | if (tb[TCA_FQ_CODEL_INTERVAL] && | |
170 | RTA_PAYLOAD(tb[TCA_FQ_CODEL_INTERVAL]) >= sizeof(__u32)) { | |
171 | interval = rta_getattr_u32(tb[TCA_FQ_CODEL_INTERVAL]); | |
172 | fprintf(f, "interval %s ", sprint_time(interval, b1)); | |
173 | } | |
174 | if (tb[TCA_FQ_CODEL_ECN] && | |
175 | RTA_PAYLOAD(tb[TCA_FQ_CODEL_ECN]) >= sizeof(__u32)) { | |
176 | ecn = rta_getattr_u32(tb[TCA_FQ_CODEL_ECN]); | |
177 | if (ecn) | |
178 | fprintf(f, "ecn "); | |
179 | } | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | static int fq_codel_print_xstats(struct qdisc_util *qu, FILE *f, | |
185 | struct rtattr *xstats) | |
186 | { | |
187 | struct tc_fq_codel_xstats *st; | |
188 | SPRINT_BUF(b1); | |
189 | ||
190 | if (xstats == NULL) | |
191 | return 0; | |
192 | ||
193 | if (RTA_PAYLOAD(xstats) < sizeof(*st)) | |
194 | return -1; | |
195 | ||
196 | st = RTA_DATA(xstats); | |
197 | if (st->type == TCA_FQ_CODEL_XSTATS_QDISC) { | |
198 | fprintf(f, " maxpacket %u drop_overlimit %u new_flow_count %u ecn_mark %u", | |
199 | st->qdisc_stats.maxpacket, | |
200 | st->qdisc_stats.drop_overlimit, | |
201 | st->qdisc_stats.new_flow_count, | |
202 | st->qdisc_stats.ecn_mark); | |
203 | fprintf(f, "\n new_flows_len %u old_flows_len %u", | |
204 | st->qdisc_stats.new_flows_len, | |
205 | st->qdisc_stats.old_flows_len); | |
206 | } | |
207 | if (st->type == TCA_FQ_CODEL_XSTATS_CLASS) { | |
208 | fprintf(f, " deficit %d count %u lastcount %u ldelay %s", | |
209 | st->class_stats.deficit, | |
210 | st->class_stats.count, | |
211 | st->class_stats.lastcount, | |
212 | sprint_time(st->class_stats.ldelay, b1)); | |
213 | if (st->class_stats.dropping) { | |
214 | fprintf(f, " dropping"); | |
215 | if (st->class_stats.drop_next < 0) | |
216 | fprintf(f, " drop_next -%s", | |
217 | sprint_time(-st->class_stats.drop_next, b1)); | |
218 | else | |
219 | fprintf(f, " drop_next %s", | |
220 | sprint_time(st->class_stats.drop_next, b1)); | |
221 | } | |
222 | } | |
223 | return 0; | |
224 | ||
225 | } | |
226 | ||
227 | struct qdisc_util fq_codel_qdisc_util = { | |
228 | .id = "fq_codel", | |
229 | .parse_qopt = fq_codel_parse_opt, | |
230 | .print_qopt = fq_codel_print_opt, | |
231 | .print_xstats = fq_codel_print_xstats, | |
232 | }; |