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