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aba5acdf SH |
1 | /* |
2 | * tc_qdisc.c "tc qdisc". | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
9 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
10 | * J Hadi Salim: Extension to ingress | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
16 | #include <syslog.h> | |
17 | #include <fcntl.h> | |
18 | #include <sys/socket.h> | |
19 | #include <netinet/in.h> | |
20 | #include <arpa/inet.h> | |
21 | #include <string.h> | |
22 | #include <math.h> | |
23 | ||
24 | #include "utils.h" | |
25 | #include "tc_util.h" | |
26 | #include "tc_common.h" | |
27 | ||
28 | static void usage(void) __attribute__((noreturn)); | |
29 | ||
30 | static void usage(void) | |
31 | { | |
32 | fprintf(stderr, "Usage: tc qdisc [ add | del | replace | change | get ] dev STRING\n"); | |
33 | fprintf(stderr, " [ handle QHANDLE ] [ root | ingress | parent CLASSID ]\n"); | |
34 | fprintf(stderr, " [ estimator INTERVAL TIME_CONSTANT ]\n"); | |
35 | fprintf(stderr, " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"); | |
36 | fprintf(stderr, "\n"); | |
37 | fprintf(stderr, " tc qdisc show [ dev STRING ] [ingress]\n"); | |
38 | fprintf(stderr, "Where:\n"); | |
39 | fprintf(stderr, "QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n"); | |
40 | fprintf(stderr, "OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n"); | |
41 | exit(-1); | |
42 | } | |
43 | ||
44 | int tc_qdisc_modify(int cmd, unsigned flags, int argc, char **argv) | |
45 | { | |
46 | struct rtnl_handle rth; | |
aba5acdf SH |
47 | struct qdisc_util *q = NULL; |
48 | struct tc_estimator est; | |
49 | char d[16]; | |
50 | char k[16]; | |
f307c24e SH |
51 | struct { |
52 | struct nlmsghdr n; | |
53 | struct tcmsg t; | |
54 | char buf[TCA_BUF_MAX]; | |
55 | } req; | |
aba5acdf SH |
56 | |
57 | memset(&req, 0, sizeof(req)); | |
58 | memset(&est, 0, sizeof(est)); | |
59 | memset(&d, 0, sizeof(d)); | |
60 | memset(&k, 0, sizeof(k)); | |
61 | ||
62 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)); | |
63 | req.n.nlmsg_flags = NLM_F_REQUEST|flags; | |
64 | req.n.nlmsg_type = cmd; | |
65 | req.t.tcm_family = AF_UNSPEC; | |
66 | ||
67 | while (argc > 0) { | |
68 | if (strcmp(*argv, "dev") == 0) { | |
69 | NEXT_ARG(); | |
70 | if (d[0]) | |
71 | duparg("dev", *argv); | |
72 | strncpy(d, *argv, sizeof(d)-1); | |
73 | } else if (strcmp(*argv, "handle") == 0) { | |
74 | __u32 handle; | |
75 | if (req.t.tcm_handle) | |
76 | duparg("handle", *argv); | |
77 | NEXT_ARG(); | |
78 | if (get_qdisc_handle(&handle, *argv)) | |
79 | invarg(*argv, "invalid qdisc ID"); | |
80 | req.t.tcm_handle = handle; | |
81 | } else if (strcmp(*argv, "root") == 0) { | |
82 | if (req.t.tcm_parent) { | |
83 | fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); | |
84 | exit(-1); | |
85 | } | |
86 | req.t.tcm_parent = TC_H_ROOT; | |
87 | #ifdef TC_H_INGRESS | |
88 | } else if (strcmp(*argv, "ingress") == 0) { | |
89 | if (req.t.tcm_parent) { | |
90 | fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n"); | |
91 | exit(-1); | |
92 | } | |
93 | req.t.tcm_parent = TC_H_INGRESS; | |
94 | strncpy(k, "ingress", sizeof(k)-1); | |
95 | q = get_qdisc_kind(k); | |
96 | req.t.tcm_handle = 0xffff0000; | |
97 | ||
98 | argc--; argv++; | |
99 | break; | |
100 | #endif | |
101 | } else if (strcmp(*argv, "parent") == 0) { | |
102 | __u32 handle; | |
103 | NEXT_ARG(); | |
104 | if (req.t.tcm_parent) | |
105 | duparg("parent", *argv); | |
106 | if (get_tc_classid(&handle, *argv)) | |
107 | invarg(*argv, "invalid parent ID"); | |
108 | req.t.tcm_parent = handle; | |
109 | } else if (matches(*argv, "estimator") == 0) { | |
110 | if (parse_estimator(&argc, &argv, &est)) | |
111 | return -1; | |
112 | } else if (matches(*argv, "help") == 0) { | |
113 | usage(); | |
114 | } else { | |
115 | strncpy(k, *argv, sizeof(k)-1); | |
116 | ||
117 | q = get_qdisc_kind(k); | |
118 | argc--; argv++; | |
119 | break; | |
120 | } | |
121 | argc--; argv++; | |
122 | } | |
123 | ||
124 | if (k[0]) | |
125 | addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); | |
126 | if (est.ewma_log) | |
127 | addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); | |
128 | ||
129 | if (q) { | |
130 | if (q->parse_qopt(q, argc, argv, &req.n)) | |
131 | exit(1); | |
132 | } else { | |
133 | if (argc) { | |
134 | if (matches(*argv, "help") == 0) | |
135 | usage(); | |
136 | ||
137 | fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv); | |
138 | exit(-1); | |
139 | } | |
140 | } | |
141 | ||
142 | if (rtnl_open(&rth, 0) < 0) { | |
143 | fprintf(stderr, "Cannot open rtnetlink\n"); | |
2373fde9 | 144 | rtnl_close(&rth); |
aba5acdf SH |
145 | exit(1); |
146 | } | |
147 | ||
148 | if (d[0]) { | |
149 | int idx; | |
150 | ||
151 | ll_init_map(&rth); | |
152 | ||
153 | if ((idx = ll_name_to_index(d)) == 0) { | |
154 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
2373fde9 | 155 | rtnl_close(&rth); |
aba5acdf SH |
156 | exit(1); |
157 | } | |
158 | req.t.tcm_ifindex = idx; | |
159 | } | |
160 | ||
2373fde9 SH |
161 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) { |
162 | rtnl_close(&rth); | |
aba5acdf | 163 | exit(2); |
2373fde9 | 164 | } |
aba5acdf SH |
165 | |
166 | rtnl_close(&rth); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | void print_tcstats(FILE *fp, struct tc_stats *st) | |
171 | { | |
172 | SPRINT_BUF(b1); | |
173 | ||
2373fde9 | 174 | fprintf(fp, " Sent %llu bytes %u pkts (dropped %u, overlimits %u ) ", |
aba5acdf SH |
175 | (unsigned long long)st->bytes, st->packets, st->drops, st->overlimits); |
176 | if (st->bps || st->pps || st->qlen || st->backlog) { | |
177 | fprintf(fp, "\n "); | |
178 | if (st->bps || st->pps) { | |
179 | fprintf(fp, "rate "); | |
180 | if (st->bps) | |
181 | fprintf(fp, "%s ", sprint_rate(st->bps, b1)); | |
182 | if (st->pps) | |
183 | fprintf(fp, "%upps ", st->pps); | |
184 | } | |
185 | if (st->qlen || st->backlog) { | |
186 | fprintf(fp, "backlog "); | |
187 | if (st->backlog) | |
188 | fprintf(fp, "%s ", sprint_size(st->backlog, b1)); | |
189 | if (st->qlen) | |
190 | fprintf(fp, "%up ", st->qlen); | |
191 | } | |
192 | } | |
193 | } | |
194 | ||
195 | static int filter_ifindex; | |
196 | ||
197 | int print_qdisc(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) | |
198 | { | |
199 | FILE *fp = (FILE*)arg; | |
200 | struct tcmsg *t = NLMSG_DATA(n); | |
201 | int len = n->nlmsg_len; | |
202 | struct rtattr * tb[TCA_MAX+1]; | |
203 | struct qdisc_util *q; | |
204 | char abuf[256]; | |
205 | ||
206 | if (n->nlmsg_type != RTM_NEWQDISC && n->nlmsg_type != RTM_DELQDISC) { | |
207 | fprintf(stderr, "Not a qdisc\n"); | |
208 | return 0; | |
209 | } | |
210 | len -= NLMSG_LENGTH(sizeof(*t)); | |
211 | if (len < 0) { | |
212 | fprintf(stderr, "Wrong len %d\n", len); | |
213 | return -1; | |
214 | } | |
215 | ||
216 | if (filter_ifindex && filter_ifindex != t->tcm_ifindex) | |
217 | return 0; | |
218 | ||
219 | memset(tb, 0, sizeof(tb)); | |
220 | parse_rtattr(tb, TCA_MAX, TCA_RTA(t), len); | |
221 | ||
222 | if (tb[TCA_KIND] == NULL) { | |
2373fde9 | 223 | fprintf(stderr, "print_qdisc: NULL kind\n"); |
aba5acdf SH |
224 | return -1; |
225 | } | |
226 | ||
227 | if (n->nlmsg_type == RTM_DELQDISC) | |
228 | fprintf(fp, "deleted "); | |
229 | ||
230 | fprintf(fp, "qdisc %s %x: ", (char*)RTA_DATA(tb[TCA_KIND]), t->tcm_handle>>16); | |
231 | if (filter_ifindex == 0) | |
232 | fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex)); | |
233 | if (t->tcm_parent == TC_H_ROOT) | |
234 | fprintf(fp, "root "); | |
235 | else if (t->tcm_parent) { | |
236 | print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); | |
237 | fprintf(fp, "parent %s ", abuf); | |
238 | } | |
239 | if (t->tcm_info != 1) { | |
240 | fprintf(fp, "refcnt %d ", t->tcm_info); | |
241 | } | |
2373fde9 SH |
242 | /* pfifo_fast is generic enough to warrant the hardcoding --JHS */ |
243 | ||
244 | if (0 == strcmp("pfifo_fast", RTA_DATA(tb[TCA_KIND]))) | |
245 | q = get_qdisc_kind("prio"); | |
246 | else | |
247 | q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND])); | |
248 | ||
aba5acdf SH |
249 | if (tb[TCA_OPTIONS]) { |
250 | if (q) | |
251 | q->print_qopt(q, fp, tb[TCA_OPTIONS]); | |
252 | else | |
253 | fprintf(fp, "[cannot parse qdisc parameters]"); | |
254 | } | |
255 | fprintf(fp, "\n"); | |
256 | if (show_stats) { | |
257 | if (tb[TCA_STATS]) { | |
258 | if (RTA_PAYLOAD(tb[TCA_STATS]) < sizeof(struct tc_stats)) | |
259 | fprintf(fp, "statistics truncated"); | |
260 | else { | |
261 | struct tc_stats st; | |
262 | memcpy(&st, RTA_DATA(tb[TCA_STATS]), sizeof(st)); | |
263 | print_tcstats(fp, &st); | |
264 | fprintf(fp, "\n"); | |
265 | } | |
266 | } | |
267 | if (q && tb[TCA_XSTATS]) { | |
268 | q->print_xstats(q, fp, tb[TCA_XSTATS]); | |
269 | fprintf(fp, "\n"); | |
270 | } | |
271 | } | |
272 | fflush(fp); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | ||
277 | int tc_qdisc_list(int argc, char **argv) | |
278 | { | |
279 | struct tcmsg t; | |
280 | struct rtnl_handle rth; | |
281 | char d[16]; | |
282 | ||
283 | memset(&t, 0, sizeof(t)); | |
284 | t.tcm_family = AF_UNSPEC; | |
285 | memset(&d, 0, sizeof(d)); | |
286 | ||
287 | while (argc > 0) { | |
288 | if (strcmp(*argv, "dev") == 0) { | |
289 | NEXT_ARG(); | |
290 | strncpy(d, *argv, sizeof(d)-1); | |
291 | #ifdef TC_H_INGRESS | |
292 | } else if (strcmp(*argv, "ingress") == 0) { | |
293 | if (t.tcm_parent) { | |
294 | fprintf(stderr, "Duplicate parent ID\n"); | |
295 | usage(); | |
296 | } | |
297 | t.tcm_parent = TC_H_INGRESS; | |
298 | #endif | |
299 | } else if (matches(*argv, "help") == 0) { | |
300 | usage(); | |
301 | } else { | |
302 | fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv); | |
303 | return -1; | |
304 | } | |
305 | ||
306 | argc--; argv++; | |
307 | } | |
308 | ||
309 | if (rtnl_open(&rth, 0) < 0) { | |
310 | fprintf(stderr, "Cannot open rtnetlink\n"); | |
311 | exit(1); | |
312 | } | |
313 | ||
314 | ll_init_map(&rth); | |
315 | ||
316 | if (d[0]) { | |
317 | if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) { | |
318 | fprintf(stderr, "Cannot find device \"%s\"\n", d); | |
2373fde9 | 319 | rtnl_close(&rth); |
aba5acdf SH |
320 | exit(1); |
321 | } | |
322 | filter_ifindex = t.tcm_ifindex; | |
323 | } | |
324 | ||
325 | if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) { | |
326 | perror("Cannot send dump request"); | |
2373fde9 | 327 | rtnl_close(&rth); |
aba5acdf SH |
328 | exit(1); |
329 | } | |
330 | ||
331 | if (rtnl_dump_filter(&rth, print_qdisc, stdout, NULL, NULL) < 0) { | |
332 | fprintf(stderr, "Dump terminated\n"); | |
2373fde9 | 333 | rtnl_close(&rth); |
aba5acdf SH |
334 | exit(1); |
335 | } | |
336 | ||
337 | rtnl_close(&rth); | |
338 | return 0; | |
339 | } | |
340 | ||
341 | int do_qdisc(int argc, char **argv) | |
342 | { | |
343 | if (argc < 1) | |
344 | return tc_qdisc_list(0, NULL); | |
345 | if (matches(*argv, "add") == 0) | |
346 | return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); | |
347 | if (matches(*argv, "change") == 0) | |
348 | return tc_qdisc_modify(RTM_NEWQDISC, 0, argc-1, argv+1); | |
349 | if (matches(*argv, "replace") == 0) | |
350 | return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1); | |
351 | if (matches(*argv, "link") == 0) | |
352 | return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_REPLACE, argc-1, argv+1); | |
353 | if (matches(*argv, "delete") == 0) | |
354 | return tc_qdisc_modify(RTM_DELQDISC, 0, argc-1, argv+1); | |
355 | #if 0 | |
356 | if (matches(*argv, "get") == 0) | |
357 | return tc_qdisc_get(RTM_GETQDISC, 0, argc-1, argv+1); | |
358 | #endif | |
359 | if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 | |
360 | || matches(*argv, "lst") == 0) | |
361 | return tc_qdisc_list(argc-1, argv+1); | |
362 | if (matches(*argv, "help") == 0) | |
363 | usage(); | |
364 | fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv); | |
365 | return -1; | |
366 | } |