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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> | |
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> | |
839c8456 | 22 | #include <malloc.h> |
aba5acdf SH |
23 | |
24 | #include "utils.h" | |
25 | #include "tc_util.h" | |
26 | #include "tc_common.h" | |
27 | ||
11656f1b | 28 | static int usage(void) |
aba5acdf | 29 | { |
8589eb4e MC |
30 | fprintf(stderr, |
31 | "Usage: tc qdisc [ add | del | replace | change | show ] dev STRING\n" | |
32 | " [ handle QHANDLE ] [ root | ingress | clsact | parent CLASSID ]\n" | |
33 | " [ estimator INTERVAL TIME_CONSTANT ]\n" | |
34 | " [ stab [ help | STAB_OPTIONS] ]\n" | |
35 | " [ ingress_block BLOCK_INDEX ] [ egress_block BLOCK_INDEX ]\n" | |
36 | " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n" | |
37 | "\n" | |
d80a05b7 | 38 | " tc qdisc { show | list } [ dev STRING ] [ QDISC_ID ] [ invisible ]\n" |
8589eb4e MC |
39 | "Where:\n" |
40 | "QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n" | |
41 | "OPTIONS := ... try tc qdisc add <desired QDISC_KIND> help\n" | |
d80a05b7 AD |
42 | "STAB_OPTIONS := ... try tc qdisc add stab help\n" |
43 | "QDISC_ID := { root | ingress | handle QHANDLE | parent CLASSID }\n"); | |
11656f1b | 44 | return -1; |
aba5acdf SH |
45 | } |
46 | ||
32a121cb | 47 | static int tc_qdisc_modify(int cmd, unsigned int flags, int argc, char **argv) |
aba5acdf | 48 | { |
aba5acdf | 49 | struct qdisc_util *q = NULL; |
9579afb2 | 50 | struct tc_estimator est = {}; |
839c8456 JK |
51 | struct { |
52 | struct tc_sizespec szopts; | |
53 | __u16 *data; | |
d17b136f | 54 | } stab = {}; |
b317557f SH |
55 | char d[IFNAMSIZ] = {}; |
56 | char k[FILTER_NAMESZ] = {}; | |
f307c24e | 57 | struct { |
32a121cb SH |
58 | struct nlmsghdr n; |
59 | struct tcmsg t; | |
60 | char buf[TCA_BUF_MAX]; | |
d17b136f PS |
61 | } req = { |
62 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
63 | .n.nlmsg_flags = NLM_F_REQUEST | flags, | |
64 | .n.nlmsg_type = cmd, | |
65 | .t.tcm_family = AF_UNSPEC, | |
66 | }; | |
063463ef JP |
67 | __u32 ingress_block = 0; |
68 | __u32 egress_block = 0; | |
aba5acdf SH |
69 | |
70 | while (argc > 0) { | |
71 | if (strcmp(*argv, "dev") == 0) { | |
72 | NEXT_ARG(); | |
73 | if (d[0]) | |
74 | duparg("dev", *argv); | |
75 | strncpy(d, *argv, sizeof(d)-1); | |
76 | } else if (strcmp(*argv, "handle") == 0) { | |
77 | __u32 handle; | |
32a121cb | 78 | |
aba5acdf SH |
79 | if (req.t.tcm_handle) |
80 | duparg("handle", *argv); | |
81 | NEXT_ARG(); | |
82 | if (get_qdisc_handle(&handle, *argv)) | |
f1675d61 | 83 | invarg("invalid qdisc ID", *argv); |
aba5acdf SH |
84 | req.t.tcm_handle = handle; |
85 | } else if (strcmp(*argv, "root") == 0) { | |
86 | if (req.t.tcm_parent) { | |
87 | fprintf(stderr, "Error: \"root\" is duplicate parent ID\n"); | |
11656f1b | 88 | return -1; |
aba5acdf SH |
89 | } |
90 | req.t.tcm_parent = TC_H_ROOT; | |
8f9afdd5 DB |
91 | } else if (strcmp(*argv, "clsact") == 0) { |
92 | if (req.t.tcm_parent) { | |
93 | fprintf(stderr, "Error: \"clsact\" is a duplicate parent ID\n"); | |
94 | return -1; | |
95 | } | |
96 | req.t.tcm_parent = TC_H_CLSACT; | |
97 | strncpy(k, "clsact", sizeof(k) - 1); | |
98 | q = get_qdisc_kind(k); | |
99 | req.t.tcm_handle = TC_H_MAKE(TC_H_CLSACT, 0); | |
100 | NEXT_ARG_FWD(); | |
101 | break; | |
aba5acdf SH |
102 | } else if (strcmp(*argv, "ingress") == 0) { |
103 | if (req.t.tcm_parent) { | |
104 | fprintf(stderr, "Error: \"ingress\" is a duplicate parent ID\n"); | |
11656f1b | 105 | return -1; |
aba5acdf SH |
106 | } |
107 | req.t.tcm_parent = TC_H_INGRESS; | |
0d45c4b4 | 108 | strncpy(k, "ingress", sizeof(k) - 1); |
aba5acdf | 109 | q = get_qdisc_kind(k); |
0d45c4b4 DB |
110 | req.t.tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0); |
111 | NEXT_ARG_FWD(); | |
aba5acdf | 112 | break; |
aba5acdf SH |
113 | } else if (strcmp(*argv, "parent") == 0) { |
114 | __u32 handle; | |
32a121cb | 115 | |
aba5acdf SH |
116 | NEXT_ARG(); |
117 | if (req.t.tcm_parent) | |
118 | duparg("parent", *argv); | |
119 | if (get_tc_classid(&handle, *argv)) | |
f1675d61 | 120 | invarg("invalid parent ID", *argv); |
aba5acdf SH |
121 | req.t.tcm_parent = handle; |
122 | } else if (matches(*argv, "estimator") == 0) { | |
123 | if (parse_estimator(&argc, &argv, &est)) | |
124 | return -1; | |
839c8456 JK |
125 | } else if (matches(*argv, "stab") == 0) { |
126 | if (parse_size_table(&argc, &argv, &stab.szopts) < 0) | |
127 | return -1; | |
128 | continue; | |
063463ef JP |
129 | } else if (matches(*argv, "ingress_block") == 0) { |
130 | NEXT_ARG(); | |
131 | if (get_u32(&ingress_block, *argv, 0) || !ingress_block) | |
132 | invarg("invalid ingress block index value", *argv); | |
133 | } else if (matches(*argv, "egress_block") == 0) { | |
134 | NEXT_ARG(); | |
135 | if (get_u32(&egress_block, *argv, 0) || !egress_block) | |
136 | invarg("invalid egress block index value", *argv); | |
aba5acdf SH |
137 | } else if (matches(*argv, "help") == 0) { |
138 | usage(); | |
139 | } else { | |
140 | strncpy(k, *argv, sizeof(k)-1); | |
141 | ||
142 | q = get_qdisc_kind(k); | |
143 | argc--; argv++; | |
144 | break; | |
145 | } | |
146 | argc--; argv++; | |
147 | } | |
148 | ||
149 | if (k[0]) | |
150 | addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1); | |
151 | if (est.ewma_log) | |
152 | addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est)); | |
153 | ||
063463ef JP |
154 | if (ingress_block) |
155 | addattr32(&req.n, sizeof(req), | |
156 | TCA_INGRESS_BLOCK, ingress_block); | |
157 | if (egress_block) | |
158 | addattr32(&req.n, sizeof(req), | |
159 | TCA_EGRESS_BLOCK, egress_block); | |
160 | ||
0a502b21 SH |
161 | if (q) { |
162 | if (q->parse_qopt) { | |
927e3cfb | 163 | if (q->parse_qopt(q, argc, argv, &req.n, d)) |
e9e78b0d | 164 | return 1; |
0a502b21 SH |
165 | } else if (argc) { |
166 | fprintf(stderr, "qdisc '%s' does not support option parsing\n", k); | |
167 | return -1; | |
168 | } | |
169 | } else { | |
170 | if (argc) { | |
aba5acdf SH |
171 | if (matches(*argv, "help") == 0) |
172 | usage(); | |
173 | ||
174 | fprintf(stderr, "Garbage instead of arguments \"%s ...\". Try \"tc qdisc help\".\n", *argv); | |
11656f1b | 175 | return -1; |
aba5acdf SH |
176 | } |
177 | } | |
178 | ||
839c8456 JK |
179 | if (check_size_table_opts(&stab.szopts)) { |
180 | struct rtattr *tail; | |
181 | ||
182 | if (tc_calc_size_table(&stab.szopts, &stab.data) < 0) { | |
183 | fprintf(stderr, "failed to calculate size table.\n"); | |
184 | return -1; | |
185 | } | |
186 | ||
c14f9d92 | 187 | tail = addattr_nest(&req.n, sizeof(req), TCA_STAB); |
839c8456 JK |
188 | addattr_l(&req.n, sizeof(req), TCA_STAB_BASE, &stab.szopts, |
189 | sizeof(stab.szopts)); | |
190 | if (stab.data) | |
191 | addattr_l(&req.n, sizeof(req), TCA_STAB_DATA, stab.data, | |
192 | stab.szopts.tsize * sizeof(__u16)); | |
c14f9d92 | 193 | addattr_nest_end(&req.n, tail); |
839c8456 JK |
194 | if (stab.data) |
195 | free(stab.data); | |
196 | } | |
197 | ||
aba5acdf SH |
198 | if (d[0]) { |
199 | int idx; | |
200 | ||
3d0b7439 | 201 | ll_init_map(&rth); |
aba5acdf | 202 | |
b932e6f3 | 203 | idx = ll_name_to_index(d); |
fe99adbc SP |
204 | if (!idx) |
205 | return -nodev(d); | |
aba5acdf SH |
206 | req.t.tcm_ifindex = idx; |
207 | } | |
208 | ||
86bf43c7 | 209 | if (rtnl_talk(&rth, &req.n, NULL) < 0) |
11656f1b | 210 | return 2; |
aba5acdf | 211 | |
aba5acdf SH |
212 | return 0; |
213 | } | |
214 | ||
aba5acdf | 215 | static int filter_ifindex; |
d80a05b7 AD |
216 | static __u32 filter_parent; |
217 | static __u32 filter_handle; | |
aba5acdf | 218 | |
cd554f2c | 219 | int print_qdisc(struct nlmsghdr *n, void *arg) |
aba5acdf | 220 | { |
32a121cb | 221 | FILE *fp = (FILE *)arg; |
aba5acdf SH |
222 | struct tcmsg *t = NLMSG_DATA(n); |
223 | int len = n->nlmsg_len; | |
32a121cb | 224 | struct rtattr *tb[TCA_MAX+1]; |
aba5acdf SH |
225 | struct qdisc_util *q; |
226 | char abuf[256]; | |
227 | ||
228 | if (n->nlmsg_type != RTM_NEWQDISC && n->nlmsg_type != RTM_DELQDISC) { | |
229 | fprintf(stderr, "Not a qdisc\n"); | |
230 | return 0; | |
231 | } | |
232 | len -= NLMSG_LENGTH(sizeof(*t)); | |
233 | if (len < 0) { | |
234 | fprintf(stderr, "Wrong len %d\n", len); | |
235 | return -1; | |
236 | } | |
237 | ||
238 | if (filter_ifindex && filter_ifindex != t->tcm_ifindex) | |
239 | return 0; | |
240 | ||
d80a05b7 AD |
241 | if (filter_handle && filter_handle != t->tcm_handle) |
242 | return 0; | |
243 | ||
244 | if (filter_parent && filter_parent != t->tcm_parent) | |
245 | return 0; | |
246 | ||
eae5f4b5 | 247 | parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED); |
aba5acdf SH |
248 | |
249 | if (tb[TCA_KIND] == NULL) { | |
2373fde9 | 250 | fprintf(stderr, "print_qdisc: NULL kind\n"); |
aba5acdf SH |
251 | return -1; |
252 | } | |
253 | ||
c91d262f JP |
254 | open_json_object(NULL); |
255 | ||
aba5acdf | 256 | if (n->nlmsg_type == RTM_DELQDISC) |
c91d262f | 257 | print_bool(PRINT_ANY, "deleted", "deleted ", true); |
aba5acdf | 258 | |
274b63ae RM |
259 | if (n->nlmsg_type == RTM_NEWQDISC && |
260 | (n->nlmsg_flags & NLM_F_CREATE) && | |
261 | (n->nlmsg_flags & NLM_F_REPLACE)) | |
c91d262f | 262 | print_bool(PRINT_ANY, "replaced", "replaced ", true); |
274b63ae RM |
263 | |
264 | if (n->nlmsg_type == RTM_NEWQDISC && | |
265 | (n->nlmsg_flags & NLM_F_CREATE) && | |
266 | (n->nlmsg_flags & NLM_F_EXCL)) | |
c91d262f JP |
267 | print_bool(PRINT_ANY, "added", "added ", true); |
268 | ||
269 | print_string(PRINT_ANY, "kind", "qdisc %s", | |
270 | rta_getattr_str(tb[TCA_KIND])); | |
271 | sprintf(abuf, "%x:", t->tcm_handle >> 16); | |
272 | print_string(PRINT_ANY, "handle", " %s", abuf); | |
273 | if (show_raw) { | |
274 | sprintf(abuf, "[%08x]", t->tcm_handle); | |
275 | print_string(PRINT_FP, NULL, "%s", abuf); | |
276 | } | |
277 | print_string(PRINT_FP, NULL, " ", NULL); | |
d42e1444 | 278 | |
aba5acdf | 279 | if (filter_ifindex == 0) |
2d165c08 | 280 | print_devname(PRINT_ANY, t->tcm_ifindex); |
b932e6f3 | 281 | |
aba5acdf | 282 | if (t->tcm_parent == TC_H_ROOT) |
c91d262f | 283 | print_bool(PRINT_ANY, "root", "root ", true); |
aba5acdf SH |
284 | else if (t->tcm_parent) { |
285 | print_tc_classid(abuf, sizeof(abuf), t->tcm_parent); | |
c91d262f | 286 | print_string(PRINT_ANY, "parent", "parent %s ", abuf); |
aba5acdf | 287 | } |
b932e6f3 SH |
288 | |
289 | if (t->tcm_info != 1) | |
c91d262f | 290 | print_uint(PRINT_ANY, "refcnt", "refcnt %u ", t->tcm_info); |
ae665a52 | 291 | |
b97c6fa7 YM |
292 | if (tb[TCA_HW_OFFLOAD] && |
293 | (rta_getattr_u8(tb[TCA_HW_OFFLOAD]))) | |
294 | print_bool(PRINT_ANY, "offloaded", "offloaded ", true); | |
295 | ||
063463ef JP |
296 | if (tb[TCA_INGRESS_BLOCK] && |
297 | RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) { | |
298 | __u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]); | |
299 | ||
300 | if (block) | |
301 | print_uint(PRINT_ANY, "ingress_block", | |
302 | "ingress_block %u ", block); | |
303 | } | |
304 | ||
305 | if (tb[TCA_EGRESS_BLOCK] && | |
306 | RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) { | |
307 | __u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]); | |
308 | ||
309 | if (block) | |
310 | print_uint(PRINT_ANY, "egress_block", | |
311 | "egress_block %u ", block); | |
312 | } | |
313 | ||
b932e6f3 SH |
314 | /* pfifo_fast is generic enough to warrant the hardcoding --JHS */ |
315 | if (strcmp("pfifo_fast", RTA_DATA(tb[TCA_KIND])) == 0) | |
2373fde9 SH |
316 | q = get_qdisc_kind("prio"); |
317 | else | |
318 | q = get_qdisc_kind(RTA_DATA(tb[TCA_KIND])); | |
ae665a52 | 319 | |
c91d262f | 320 | open_json_object("options"); |
aba5acdf SH |
321 | if (tb[TCA_OPTIONS]) { |
322 | if (q) | |
323 | q->print_qopt(q, fp, tb[TCA_OPTIONS]); | |
324 | else | |
d5ddb441 | 325 | fprintf(stderr, "Cannot parse qdisc parameters\n"); |
aba5acdf | 326 | } |
c91d262f JP |
327 | close_json_object(); |
328 | ||
7b0d424a | 329 | print_nl(); |
b932e6f3 | 330 | |
839c8456 JK |
331 | if (show_details && tb[TCA_STAB]) { |
332 | print_size_table(fp, " ", tb[TCA_STAB]); | |
7b0d424a | 333 | print_nl(); |
839c8456 | 334 | } |
b932e6f3 | 335 | |
aba5acdf | 336 | if (show_stats) { |
e5879dc6 | 337 | struct rtattr *xstats = NULL; |
338 | ||
339 | if (tb[TCA_STATS] || tb[TCA_STATS2] || tb[TCA_XSTATS]) { | |
340 | print_tcstats_attr(fp, tb, " ", &xstats); | |
7b0d424a | 341 | print_nl(); |
aba5acdf | 342 | } |
649b0755 | 343 | |
e5879dc6 | 344 | if (q && xstats && q->print_xstats) { |
345 | q->print_xstats(q, fp, xstats); | |
7b0d424a | 346 | print_nl(); |
aba5acdf SH |
347 | } |
348 | } | |
c91d262f | 349 | close_json_object(); |
aba5acdf SH |
350 | fflush(fp); |
351 | return 0; | |
352 | } | |
353 | ||
d1f28cf1 | 354 | static int tc_qdisc_list(int argc, char **argv) |
aba5acdf | 355 | { |
d80a05b7 AD |
356 | struct { |
357 | struct nlmsghdr n; | |
358 | struct tcmsg t; | |
359 | char buf[256]; | |
360 | } req = { | |
361 | .n.nlmsg_type = RTM_GETQDISC, | |
362 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
363 | .t.tcm_family = AF_UNSPEC, | |
364 | }; | |
365 | ||
b317557f | 366 | char d[IFNAMSIZ] = {}; |
7c581a12 | 367 | bool dump_invisible = false; |
d80a05b7 | 368 | __u32 handle; |
ae665a52 | 369 | |
aba5acdf SH |
370 | while (argc > 0) { |
371 | if (strcmp(*argv, "dev") == 0) { | |
372 | NEXT_ARG(); | |
373 | strncpy(d, *argv, sizeof(d)-1); | |
d80a05b7 AD |
374 | } else if (strcmp(*argv, "root") == 0) { |
375 | if (filter_parent) | |
376 | invarg("parent is already specified", *argv); | |
377 | else if (filter_handle) | |
378 | invarg("handle is already specified", *argv); | |
379 | filter_parent = TC_H_ROOT; | |
32a121cb | 380 | } else if (strcmp(*argv, "ingress") == 0 || |
d80a05b7 AD |
381 | strcmp(*argv, "clsact") == 0) { |
382 | if (filter_parent) | |
383 | invarg("parent is already specified", *argv); | |
384 | else if (filter_handle) | |
385 | invarg("handle is already specified", *argv); | |
386 | filter_parent = TC_H_INGRESS; | |
387 | } else if (matches(*argv, "parent") == 0) { | |
388 | if (filter_parent) | |
389 | invarg("parent is already specified", *argv); | |
390 | else if (filter_handle) | |
391 | invarg("handle is already specified", *argv); | |
392 | NEXT_ARG(); | |
393 | if (get_tc_classid(&handle, *argv)) | |
394 | invarg("invalid parent ID", *argv); | |
395 | filter_parent = handle; | |
396 | } else if (matches(*argv, "handle") == 0) { | |
397 | if (filter_parent) | |
398 | invarg("parent is already specified", *argv); | |
399 | else if (filter_handle) | |
400 | invarg("handle is already specified", *argv); | |
401 | NEXT_ARG(); | |
402 | if (get_qdisc_handle(&handle, *argv)) | |
403 | invarg("invalid handle ID", *argv); | |
404 | filter_handle = handle; | |
aba5acdf SH |
405 | } else if (matches(*argv, "help") == 0) { |
406 | usage(); | |
7c581a12 JK |
407 | } else if (strcmp(*argv, "invisible") == 0) { |
408 | dump_invisible = true; | |
aba5acdf SH |
409 | } else { |
410 | fprintf(stderr, "What is \"%s\"? Try \"tc qdisc help\".\n", *argv); | |
411 | return -1; | |
412 | } | |
413 | ||
414 | argc--; argv++; | |
415 | } | |
416 | ||
3d0b7439 | 417 | ll_init_map(&rth); |
aba5acdf SH |
418 | |
419 | if (d[0]) { | |
d80a05b7 AD |
420 | req.t.tcm_ifindex = ll_name_to_index(d); |
421 | if (!req.t.tcm_ifindex) | |
fe99adbc | 422 | return -nodev(d); |
d80a05b7 | 423 | filter_ifindex = req.t.tcm_ifindex; |
aba5acdf SH |
424 | } |
425 | ||
7c581a12 | 426 | if (dump_invisible) { |
7c581a12 | 427 | addattr(&req.n, 256, TCA_DUMP_INVISIBLE); |
d80a05b7 | 428 | } |
7c581a12 | 429 | |
d80a05b7 AD |
430 | if (rtnl_dump_request_n(&rth, &req.n) < 0) { |
431 | perror("Cannot send request"); | |
11656f1b | 432 | return 1; |
aba5acdf SH |
433 | } |
434 | ||
c91d262f | 435 | new_json_obj(json); |
3d0b7439 | 436 | if (rtnl_dump_filter(&rth, print_qdisc, stdout) < 0) { |
aba5acdf | 437 | fprintf(stderr, "Dump terminated\n"); |
11656f1b | 438 | return 1; |
aba5acdf | 439 | } |
c91d262f | 440 | delete_json_obj(); |
aba5acdf | 441 | |
aba5acdf SH |
442 | return 0; |
443 | } | |
444 | ||
445 | int do_qdisc(int argc, char **argv) | |
446 | { | |
447 | if (argc < 1) | |
448 | return tc_qdisc_list(0, NULL); | |
449 | if (matches(*argv, "add") == 0) | |
450 | return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_EXCL|NLM_F_CREATE, argc-1, argv+1); | |
451 | if (matches(*argv, "change") == 0) | |
452 | return tc_qdisc_modify(RTM_NEWQDISC, 0, argc-1, argv+1); | |
453 | if (matches(*argv, "replace") == 0) | |
454 | return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1); | |
455 | if (matches(*argv, "link") == 0) | |
456 | return tc_qdisc_modify(RTM_NEWQDISC, NLM_F_REPLACE, argc-1, argv+1); | |
457 | if (matches(*argv, "delete") == 0) | |
458 | return tc_qdisc_modify(RTM_DELQDISC, 0, argc-1, argv+1); | |
aba5acdf SH |
459 | if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 |
460 | || matches(*argv, "lst") == 0) | |
461 | return tc_qdisc_list(argc-1, argv+1); | |
e5d179d8 | 462 | if (matches(*argv, "help") == 0) { |
aba5acdf | 463 | usage(); |
e5d179d8 | 464 | return 0; |
32a121cb | 465 | } |
aba5acdf SH |
466 | fprintf(stderr, "Command \"%s\" is unknown, try \"tc qdisc help\".\n", *argv); |
467 | return -1; | |
468 | } | |
d0bcedd5 JP |
469 | |
470 | struct tc_qdisc_block_exists_ctx { | |
471 | __u32 block_index; | |
472 | bool found; | |
473 | }; | |
474 | ||
cd554f2c | 475 | static int tc_qdisc_block_exists_cb(struct nlmsghdr *n, void *arg) |
d0bcedd5 JP |
476 | { |
477 | struct tc_qdisc_block_exists_ctx *ctx = arg; | |
478 | struct tcmsg *t = NLMSG_DATA(n); | |
479 | struct rtattr *tb[TCA_MAX+1]; | |
480 | int len = n->nlmsg_len; | |
af0e036c PM |
481 | struct qdisc_util *q; |
482 | const char *kind; | |
483 | int err; | |
d0bcedd5 JP |
484 | |
485 | if (n->nlmsg_type != RTM_NEWQDISC) | |
486 | return 0; | |
487 | ||
488 | len -= NLMSG_LENGTH(sizeof(*t)); | |
489 | if (len < 0) | |
490 | return -1; | |
491 | ||
eae5f4b5 | 492 | parse_rtattr_flags(tb, TCA_MAX, TCA_RTA(t), len, NLA_F_NESTED); |
d0bcedd5 JP |
493 | |
494 | if (tb[TCA_KIND] == NULL) | |
495 | return -1; | |
496 | ||
497 | if (tb[TCA_INGRESS_BLOCK] && | |
498 | RTA_PAYLOAD(tb[TCA_INGRESS_BLOCK]) >= sizeof(__u32)) { | |
499 | __u32 block = rta_getattr_u32(tb[TCA_INGRESS_BLOCK]); | |
500 | ||
501 | if (block == ctx->block_index) | |
502 | ctx->found = true; | |
503 | } | |
504 | ||
505 | if (tb[TCA_EGRESS_BLOCK] && | |
506 | RTA_PAYLOAD(tb[TCA_EGRESS_BLOCK]) >= sizeof(__u32)) { | |
507 | __u32 block = rta_getattr_u32(tb[TCA_EGRESS_BLOCK]); | |
508 | ||
509 | if (block == ctx->block_index) | |
510 | ctx->found = true; | |
511 | } | |
af0e036c PM |
512 | |
513 | kind = rta_getattr_str(tb[TCA_KIND]); | |
514 | q = get_qdisc_kind(kind); | |
515 | if (!q) | |
516 | return -1; | |
517 | if (q->has_block) { | |
518 | bool found = false; | |
519 | ||
520 | err = q->has_block(q, tb[TCA_OPTIONS], ctx->block_index, &found); | |
521 | if (err) | |
522 | return err; | |
523 | if (found) | |
524 | ctx->found = true; | |
525 | } | |
526 | ||
d0bcedd5 JP |
527 | return 0; |
528 | } | |
529 | ||
530 | bool tc_qdisc_block_exists(__u32 block_index) | |
531 | { | |
532 | struct tc_qdisc_block_exists_ctx ctx = { .block_index = block_index }; | |
533 | struct tcmsg t = { .tcm_family = AF_UNSPEC }; | |
534 | ||
535 | if (rtnl_dump_request(&rth, RTM_GETQDISC, &t, sizeof(t)) < 0) { | |
536 | perror("Cannot send dump request"); | |
537 | return false; | |
538 | } | |
539 | ||
540 | if (rtnl_dump_filter(&rth, tc_qdisc_block_exists_cb, &ctx) < 0) { | |
541 | perror("Dump terminated\n"); | |
542 | return false; | |
543 | } | |
544 | ||
545 | return ctx.found; | |
546 | } |