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aba5acdf SH |
1 | /* |
2 | * tc_class.c "tc class". | |
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 | * | |
11 | */ | |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
aba5acdf SH |
16 | #include <fcntl.h> |
17 | #include <sys/socket.h> | |
18 | #include <netinet/in.h> | |
19 | #include <arpa/inet.h> | |
20 | #include <string.h> | |
21 | #include <math.h> | |
22 | ||
23 | #include "utils.h" | |
24 | #include "tc_util.h" | |
25 | #include "tc_common.h" | |
4952b459 | 26 | #include "list.h" |
d954b34a VK |
27 | |
28 | struct graph_node { | |
29 | struct hlist_node hlist; | |
30 | __u32 id; | |
31 | __u32 parent_id; | |
32 | struct graph_node *parent_node; | |
33 | struct graph_node *right_node; | |
34 | void *data; | |
35 | int data_len; | |
36 | int nodes_count; | |
37 | }; | |
38 | ||
39 | static struct hlist_head cls_list = {}; | |
40 | static struct hlist_head root_cls_list = {}; | |
aba5acdf | 41 | |
b611d516 | 42 | static void usage(void); |
aba5acdf SH |
43 | |
44 | static void usage(void) | |
45 | { | |
8589eb4e MC |
46 | fprintf(stderr, |
47 | "Usage: tc class [ add | del | change | replace | show ] dev STRING\n" | |
48 | " [ classid CLASSID ] [ root | parent CLASSID ]\n" | |
49 | " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n" | |
50 | "\n" | |
51 | " tc class show [ dev STRING ] [ root | parent CLASSID ]\n" | |
52 | "Where:\n" | |
53 | "QDISC_KIND := { prio | cbq | etc. }\n" | |
54 | "OPTIONS := ... try tc class add <desired QDISC_KIND> help\n"); | |
aba5acdf SH |
55 | } |
56 | ||
32a121cb | 57 | static int tc_class_modify(int cmd, unsigned int flags, int argc, char **argv) |
aba5acdf | 58 | { |
aba5acdf | 59 | struct { |
32a121cb SH |
60 | struct nlmsghdr n; |
61 | struct tcmsg t; | |
62 | char buf[4096]; | |
d17b136f PS |
63 | } req = { |
64 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
65 | .n.nlmsg_flags = NLM_F_REQUEST | flags, | |
66 | .n.nlmsg_type = cmd, | |
67 | .t.tcm_family = AF_UNSPEC, | |
68 | }; | |
aba5acdf | 69 | struct qdisc_util *q = NULL; |
d17b136f | 70 | struct tc_estimator est = {}; |
b317557f SH |
71 | char d[IFNAMSIZ] = {}; |
72 | char k[FILTER_NAMESZ] = {}; | |
aba5acdf SH |
73 | |
74 | while (argc > 0) { | |
75 | if (strcmp(*argv, "dev") == 0) { | |
76 | NEXT_ARG(); | |
77 | if (d[0]) | |
78 | duparg("dev", *argv); | |
79 | strncpy(d, *argv, sizeof(d)-1); | |
80 | } else if (strcmp(*argv, "classid") == 0) { | |
81 | __u32 handle; | |
32a121cb | 82 | |
aba5acdf SH |
83 | NEXT_ARG(); |
84 | if (req.t.tcm_handle) | |
85 | duparg("classid", *argv); | |
86 | if (get_tc_classid(&handle, *argv)) | |
f1675d61 | 87 | invarg("invalid class ID", *argv); |
aba5acdf | 88 | req.t.tcm_handle = handle; |
7e6b809c SH |
89 | } else if (strcmp(*argv, "handle") == 0) { |
90 | fprintf(stderr, "Error: try \"classid\" instead of \"handle\"\n"); | |
91 | return -1; | |
3d0b7439 | 92 | } else if (strcmp(*argv, "root") == 0) { |
aba5acdf SH |
93 | if (req.t.tcm_parent) { |
94 | fprintf(stderr, "Error: \"root\" is duplicate parent ID.\n"); | |
b611d516 | 95 | return -1; |
aba5acdf SH |
96 | } |
97 | req.t.tcm_parent = TC_H_ROOT; | |
98 | } else if (strcmp(*argv, "parent") == 0) { | |
99 | __u32 handle; | |
32a121cb | 100 | |
aba5acdf SH |
101 | NEXT_ARG(); |
102 | if (req.t.tcm_parent) | |
103 | duparg("parent", *argv); | |
104 | if (get_tc_classid(&handle, *argv)) | |
f1675d61 | 105 | invarg("invalid parent ID", *argv); |
aba5acdf SH |
106 | req.t.tcm_parent = handle; |
107 | } else if (matches(*argv, "estimator") == 0) { | |
108 | if (parse_estimator(&argc, &argv, &est)) | |
109 | return -1; | |
110 | } else if (matches(*argv, "help") == 0) { | |
111 | usage(); | |
112 | } else { | |
113 | strncpy(k, *argv, sizeof(k)-1); | |
114 | ||
115 | q = get_qdisc_kind(k); | |
116 | argc--; argv++; | |
117 | break; | |
118 | } | |
119 | argc--; argv++; | |
120 | } | |
121 | ||
122 | if (k[0]) | |
123 | addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); | |
124 | if (est.ewma_log) | |
125 | addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); | |
126 | ||
127 | if (q) { | |
128 | if (q->parse_copt == NULL) { | |
129 | fprintf(stderr, "Error: Qdisc \"%s\" is classless.\n", k); | |
b611d516 | 130 | return 1; |
aba5acdf | 131 | } |
927e3cfb | 132 | if (q->parse_copt(q, argc, argv, &req.n, d)) |
b611d516 | 133 | return 1; |
aba5acdf SH |
134 | } else { |
135 | if (argc) { | |
136 | if (matches(*argv, "help") == 0) | |
137 | usage(); | |
138 | fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc class help\".", *argv); | |
b611d516 | 139 | return -1; |
aba5acdf SH |
140 | } |
141 | } | |
142 | ||
aba5acdf | 143 | if (d[0]) { |
7901660a | 144 | ll_init_map(&rth); |
aba5acdf | 145 | |
fe99adbc SP |
146 | req.t.tcm_ifindex = ll_name_to_index(d); |
147 | if (!req.t.tcm_ifindex) | |
148 | return -nodev(d); | |
aba5acdf SH |
149 | } |
150 | ||
86bf43c7 | 151 | if (rtnl_talk(&rth, &req.n, NULL) < 0) |
b611d516 | 152 | return 2; |
aba5acdf | 153 | |
aba5acdf SH |
154 | return 0; |
155 | } | |
156 | ||
7e569d92 SH |
157 | static int filter_ifindex; |
158 | static __u32 filter_qdisc; | |
159 | static __u32 filter_classid; | |
aba5acdf | 160 | |
d954b34a VK |
161 | static void graph_node_add(__u32 parent_id, __u32 id, void *data, |
162 | int len) | |
163 | { | |
f89bb021 | 164 | struct graph_node *node = calloc(1, sizeof(struct graph_node)); |
d954b34a | 165 | |
d954b34a VK |
166 | node->id = id; |
167 | node->parent_id = parent_id; | |
168 | ||
169 | if (data && len) { | |
170 | node->data = malloc(len); | |
171 | node->data_len = len; | |
172 | memcpy(node->data, data, len); | |
173 | } | |
174 | ||
175 | if (parent_id == TC_H_ROOT) | |
176 | hlist_add_head(&node->hlist, &root_cls_list); | |
177 | else | |
178 | hlist_add_head(&node->hlist, &cls_list); | |
179 | } | |
180 | ||
181 | static void graph_indent(char *buf, struct graph_node *node, int is_newline, | |
182 | int add_spaces) | |
183 | { | |
184 | char spaces[100] = {0}; | |
185 | ||
186 | while (node && node->parent_node) { | |
187 | node->parent_node->right_node = node; | |
188 | node = node->parent_node; | |
189 | } | |
190 | while (node && node->right_node) { | |
191 | if (node->hlist.next) | |
192 | strcat(buf, "| "); | |
193 | else | |
194 | strcat(buf, " "); | |
195 | ||
196 | node = node->right_node; | |
197 | } | |
198 | ||
199 | if (is_newline) { | |
200 | if (node->hlist.next && node->nodes_count) | |
201 | strcat(buf, "| |"); | |
202 | else if (node->hlist.next) | |
203 | strcat(buf, "| "); | |
204 | else if (node->nodes_count) | |
205 | strcat(buf, " |"); | |
206 | else if (!node->hlist.next) | |
207 | strcat(buf, " "); | |
208 | } | |
209 | if (add_spaces > 0) { | |
210 | sprintf(spaces, "%-*s", add_spaces, ""); | |
211 | strcat(buf, spaces); | |
212 | } | |
213 | } | |
214 | ||
215 | static void graph_cls_show(FILE *fp, char *buf, struct hlist_head *root_list, | |
216 | int level) | |
217 | { | |
218 | struct hlist_node *n, *tmp_cls; | |
219 | char cls_id_str[256] = {}; | |
30a8842c | 220 | struct rtattr *tb[TCA_MAX + 1]; |
d954b34a | 221 | struct qdisc_util *q; |
b8a6088e | 222 | char str[300] = {}; |
d954b34a VK |
223 | |
224 | hlist_for_each_safe(n, tmp_cls, root_list) { | |
225 | struct hlist_node *c, *tmp_chld; | |
226 | struct hlist_head children = {}; | |
227 | struct graph_node *cls = container_of(n, struct graph_node, | |
228 | hlist); | |
229 | ||
230 | hlist_for_each_safe(c, tmp_chld, &cls_list) { | |
231 | struct graph_node *child = container_of(c, | |
232 | struct graph_node, hlist); | |
233 | ||
234 | if (cls->id == child->parent_id) { | |
235 | hlist_del(c); | |
236 | hlist_add_head(c, &children); | |
237 | cls->nodes_count++; | |
238 | child->parent_node = cls; | |
239 | } | |
240 | } | |
241 | ||
242 | graph_indent(buf, cls, 0, 0); | |
243 | ||
244 | print_tc_classid(cls_id_str, sizeof(cls_id_str), cls->id); | |
b8a6088e SH |
245 | snprintf(str, sizeof(str), |
246 | "+---(%s)", cls_id_str); | |
d954b34a VK |
247 | strcat(buf, str); |
248 | ||
eae5f4b5 LM |
249 | parse_rtattr_flags(tb, TCA_MAX, (struct rtattr *)cls->data, |
250 | cls->data_len, NLA_F_NESTED); | |
d954b34a VK |
251 | |
252 | if (tb[TCA_KIND] == NULL) { | |
253 | strcat(buf, " [unknown qdisc kind] "); | |
254 | } else { | |
255 | const char *kind = rta_getattr_str(tb[TCA_KIND]); | |
256 | ||
257 | sprintf(str, " %s ", kind); | |
258 | strcat(buf, str); | |
259 | fprintf(fp, "%s", buf); | |
260 | buf[0] = '\0'; | |
261 | ||
262 | q = get_qdisc_kind(kind); | |
263 | if (q && q->print_copt) { | |
264 | q->print_copt(q, fp, tb[TCA_OPTIONS]); | |
265 | } | |
266 | if (q && show_stats) { | |
267 | int cls_indent = strlen(q->id) - 2 + | |
268 | strlen(cls_id_str); | |
269 | struct rtattr *stats = NULL; | |
270 | ||
271 | graph_indent(buf, cls, 1, cls_indent); | |
272 | ||
273 | if (tb[TCA_STATS] || tb[TCA_STATS2]) { | |
274 | fprintf(fp, "\n"); | |
275 | print_tcstats_attr(fp, tb, buf, &stats); | |
276 | buf[0] = '\0'; | |
277 | } | |
278 | if (cls->hlist.next || cls->nodes_count) { | |
279 | strcat(buf, "\n"); | |
280 | graph_indent(buf, cls, 1, 0); | |
281 | } | |
282 | } | |
283 | } | |
284 | free(cls->data); | |
285 | fprintf(fp, "%s\n", buf); | |
286 | buf[0] = '\0'; | |
287 | ||
288 | graph_cls_show(fp, buf, &children, level + 1); | |
289 | if (!cls->hlist.next) { | |
290 | graph_indent(buf, cls, 0, 0); | |
291 | strcat(buf, "\n"); | |
292 | } | |
293 | ||
294 | fprintf(fp, "%s", buf); | |
295 | buf[0] = '\0'; | |
296 | free(cls); | |
297 | } | |
298 | } | |
299 | ||
cd554f2c | 300 | int print_class(struct nlmsghdr *n, void *arg) |
aba5acdf | 301 | { |
32a121cb | 302 | FILE *fp = (FILE *)arg; |
aba5acdf SH |
303 | struct tcmsg *t = NLMSG_DATA(n); |
304 | int len = n->nlmsg_len; | |
30a8842c | 305 | struct rtattr *tb[TCA_MAX + 1]; |
aba5acdf SH |
306 | struct qdisc_util *q; |
307 | char abuf[256]; | |
308 | ||
309 | if (n->nlmsg_type != RTM_NEWTCLASS && n->nlmsg_type != RTM_DELTCLASS) { | |
310 | fprintf(stderr, "Not a class\n"); | |
311 | return 0; | |
312 | } | |
313 | len -= NLMSG_LENGTH(sizeof(*t)); | |
314 | if (len < 0) { | |
315 | fprintf(stderr, "Wrong len %d\n", len); | |
316 | return -1; | |
317 | } | |
d954b34a VK |
318 | |
319 | if (show_graph) { | |
320 | graph_node_add(t->tcm_parent, t->tcm_handle, TCA_RTA(t), len); | |
321 | return 0; | |
322 | } | |
323 | ||
aba5acdf SH |
324 | if (filter_qdisc && TC_H_MAJ(t->tcm_handle^filter_qdisc)) |
325 | return 0; | |
326 | ||
f4a8b23d DF |
327 | if (filter_classid && t->tcm_handle != filter_classid) |
328 | return 0; | |
329 | ||
eae5f4b5 | 330 | parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED); |
aba5acdf SH |
331 | |
332 | if (tb[TCA_KIND] == NULL) { | |
2373fde9 | 333 | fprintf(stderr, "print_class: NULL kind\n"); |
aba5acdf SH |
334 | return -1; |
335 | } | |
336 | ||
337 | if (n->nlmsg_type == RTM_DELTCLASS) | |
338 | fprintf(fp, "deleted "); | |
339 | ||
340 | abuf[0] = 0; | |
341 | if (t->tcm_handle) { | |
342 | if (filter_qdisc) | |
343 | print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_handle)); | |
344 | else | |
345 | print_tc_classid(abuf, sizeof(abuf), t->tcm_handle); | |
346 | } | |
ff24746c | 347 | fprintf(fp, "class %s %s ", rta_getattr_str(tb[TCA_KIND]), abuf); |
aba5acdf SH |
348 | |
349 | if (filter_ifindex == 0) | |
350 | fprintf(fp, "dev %s ", ll_index_to_name(t->tcm_ifindex)); | |
351 | ||
352 | if (t->tcm_parent == TC_H_ROOT) | |
353 | fprintf(fp, "root "); | |
354 | else { | |
355 | if (filter_qdisc) | |
356 | print_tc_classid(abuf, sizeof(abuf), TC_H_MIN(t->tcm_parent)); | |
357 | else | |
358 | print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); | |
359 | fprintf(fp, "parent %s ", abuf); | |
360 | } | |
361 | if (t->tcm_info) | |
362 | fprintf(fp, "leaf %x: ", t->tcm_info>>16); | |
363 | q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND])); | |
364 | if (tb[TCA_OPTIONS]) { | |
365 | if (q && q->print_copt) | |
366 | q->print_copt(q, fp, tb[TCA_OPTIONS]); | |
367 | else | |
368 | fprintf(fp, "[cannot parse class parameters]"); | |
369 | } | |
370 | fprintf(fp, "\n"); | |
371 | if (show_stats) { | |
e5879dc6 | 372 | struct rtattr *xstats = NULL; |
ae665a52 | 373 | |
e5879dc6 | 374 | if (tb[TCA_STATS] || tb[TCA_STATS2]) { |
375 | print_tcstats_attr(fp, tb, " ", &xstats); | |
2c5474ad | 376 | fprintf(fp, "\n"); |
aba5acdf | 377 | } |
e5879dc6 | 378 | if (q && (xstats || tb[TCA_XSTATS]) && q->print_xstats) { |
379 | q->print_xstats(q, fp, xstats ? : tb[TCA_XSTATS]); | |
aba5acdf SH |
380 | fprintf(fp, "\n"); |
381 | } | |
382 | } | |
383 | fflush(fp); | |
384 | return 0; | |
385 | } | |
386 | ||
387 | ||
d1f28cf1 | 388 | static int tc_class_list(int argc, char **argv) |
aba5acdf | 389 | { |
d17b136f | 390 | struct tcmsg t = { .tcm_family = AF_UNSPEC }; |
b317557f | 391 | char d[IFNAMSIZ] = {}; |
d954b34a | 392 | char buf[1024] = {0}; |
aba5acdf | 393 | |
9bea14ff NK |
394 | filter_qdisc = 0; |
395 | filter_classid = 0; | |
396 | ||
aba5acdf SH |
397 | while (argc > 0) { |
398 | if (strcmp(*argv, "dev") == 0) { | |
399 | NEXT_ARG(); | |
400 | if (d[0]) | |
401 | duparg("dev", *argv); | |
402 | strncpy(d, *argv, sizeof(d)-1); | |
403 | } else if (strcmp(*argv, "qdisc") == 0) { | |
404 | NEXT_ARG(); | |
405 | if (filter_qdisc) | |
406 | duparg("qdisc", *argv); | |
407 | if (get_qdisc_handle(&filter_qdisc, *argv)) | |
f1675d61 | 408 | invarg("invalid qdisc ID", *argv); |
f4a8b23d DF |
409 | } else if (strcmp(*argv, "classid") == 0) { |
410 | NEXT_ARG(); | |
411 | if (filter_classid) | |
412 | duparg("classid", *argv); | |
413 | if (get_tc_classid(&filter_classid, *argv)) | |
f1675d61 | 414 | invarg("invalid class ID", *argv); |
aba5acdf SH |
415 | } else if (strcmp(*argv, "root") == 0) { |
416 | if (t.tcm_parent) { | |
417 | fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); | |
b611d516 | 418 | return -1; |
aba5acdf SH |
419 | } |
420 | t.tcm_parent = TC_H_ROOT; | |
421 | } else if (strcmp(*argv, "parent") == 0) { | |
422 | __u32 handle; | |
32a121cb | 423 | |
aba5acdf SH |
424 | if (t.tcm_parent) |
425 | duparg("parent", *argv); | |
426 | NEXT_ARG(); | |
427 | if (get_tc_classid(&handle, *argv)) | |
f1675d61 | 428 | invarg("invalid parent ID", *argv); |
aba5acdf SH |
429 | t.tcm_parent = handle; |
430 | } else if (matches(*argv, "help") == 0) { | |
431 | usage(); | |
432 | } else { | |
433 | fprintf(stderr, "What is \"%s\"? Try \"tc class help\".\n", *argv); | |
b611d516 | 434 | return -1; |
aba5acdf SH |
435 | } |
436 | ||
437 | argc--; argv++; | |
438 | } | |
439 | ||
3d0b7439 | 440 | ll_init_map(&rth); |
aba5acdf SH |
441 | |
442 | if (d[0]) { | |
fe99adbc SP |
443 | t.tcm_ifindex = ll_name_to_index(d); |
444 | if (!t.tcm_ifindex) | |
445 | return -nodev(d); | |
aba5acdf SH |
446 | filter_ifindex = t.tcm_ifindex; |
447 | } | |
448 | ||
3d0b7439 | 449 | if (rtnl_dump_request(&rth, RTM_GETTCLASS, &t, sizeof(t)) < 0) { |
aba5acdf | 450 | perror("Cannot send dump request"); |
b611d516 | 451 | return 1; |
aba5acdf SH |
452 | } |
453 | ||
3d0b7439 | 454 | if (rtnl_dump_filter(&rth, print_class, stdout) < 0) { |
aba5acdf | 455 | fprintf(stderr, "Dump terminated\n"); |
b611d516 | 456 | return 1; |
aba5acdf SH |
457 | } |
458 | ||
d954b34a VK |
459 | if (show_graph) |
460 | graph_cls_show(stdout, &buf[0], &root_cls_list, 0); | |
461 | ||
aba5acdf SH |
462 | return 0; |
463 | } | |
464 | ||
465 | int do_class(int argc, char **argv) | |
466 | { | |
467 | if (argc < 1) | |
468 | return tc_class_list(0, NULL); | |
469 | if (matches(*argv, "add") == 0) | |
470 | return tc_class_modify(RTM_NEWTCLASS, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); | |
471 | if (matches(*argv, "change") == 0) | |
472 | return tc_class_modify(RTM_NEWTCLASS, 0, argc-1, argv+1); | |
473 | if (matches(*argv, "replace") == 0) | |
474 | return tc_class_modify(RTM_NEWTCLASS, NLM_F_CREATE, argc-1, argv+1); | |
475 | if (matches(*argv, "delete") == 0) | |
476 | return tc_class_modify(RTM_DELTCLASS, 0, argc-1, argv+1); | |
477 | #if 0 | |
478 | if (matches(*argv, "get") == 0) | |
479 | return tc_class_get(RTM_GETTCLASS, 0, argc-1, argv+1); | |
480 | #endif | |
481 | if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 | |
482 | || matches(*argv, "lst") == 0) | |
483 | return tc_class_list(argc-1, argv+1); | |
e5d179d8 | 484 | if (matches(*argv, "help") == 0) { |
aba5acdf | 485 | usage(); |
e5d179d8 HT |
486 | return 0; |
487 | } | |
aba5acdf SH |
488 | fprintf(stderr, "Command \"%s\" is unknown, try \"tc class help\".\n", *argv); |
489 | return -1; | |
490 | } |