source: MondoRescue/branches/3.2/mindi-busybox/networking/tc.c@ 3232

Last change on this file since 3232 was 3232, checked in by Bruno Cornec, 10 years ago
  • Update mindi-busybox to 1.21.1
  • Property svn:eol-style set to native
File size: 15.4 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
4 *
5 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
6 *
7 * Bernhard Reutner-Fischer adjusted for busybox
8 */
9
10//usage:#define tc_trivial_usage
11/* //usage: "[OPTIONS] OBJECT CMD [dev STRING]" */
12//usage: "OBJECT CMD [dev STRING]"
13//usage:#define tc_full_usage "\n\n"
14//usage: "OBJECT: {qdisc|class|filter}\n"
15//usage: "CMD: {add|del|change|replace|show}\n"
16//usage: "\n"
17//usage: "qdisc [ handle QHANDLE ] [ root |"IF_FEATURE_TC_INGRESS(" ingress |")" parent CLASSID ]\n"
18/* //usage: "[ estimator INTERVAL TIME_CONSTANT ]\n" */
19//usage: " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"
20//usage: " QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }\n"
21//usage: "qdisc show [ dev STRING ]"IF_FEATURE_TC_INGRESS(" [ingress]")"\n"
22//usage: "class [ classid CLASSID ] [ root | parent CLASSID ]\n"
23//usage: " [ [ QDISC_KIND ] [ help | OPTIONS ] ]\n"
24//usage: "class show [ dev STRING ] [ root | parent CLASSID ]\n"
25//usage: "filter [ pref PRIO ] [ protocol PROTO ]\n"
26/* //usage: "\t[ estimator INTERVAL TIME_CONSTANT ]\n" */
27//usage: " [ root | classid CLASSID ] [ handle FILTERID ]\n"
28//usage: " [ [ FILTER_TYPE ] [ help | OPTIONS ] ]\n"
29//usage: "filter show [ dev STRING ] [ root | parent CLASSID ]"
30
31#include "libbb.h"
32
33#include "libiproute/utils.h"
34#include "libiproute/ip_common.h"
35#include "libiproute/rt_names.h"
36#include <linux/pkt_sched.h> /* for the TC_H_* macros */
37
38#define parse_rtattr_nested(tb, max, rta) \
39 (parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
40
41/* nullifies tb on error */
42#define __parse_rtattr_nested_compat(tb, max, rta, len) \
43 ({if ((RTA_PAYLOAD(rta) >= len) && \
44 (RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr))) { \
45 rta = RTA_DATA(rta) + RTA_ALIGN(len); \
46 parse_rtattr_nested(tb, max, rta); \
47 } else \
48 memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); \
49 })
50
51#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
52 ({data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
53 __parse_rtattr_nested_compat(tb, max, rta, len); })
54
55#define show_details (0) /* not implemented. Does anyone need it? */
56#define use_iec (0) /* not currently documented in the upstream manpage */
57
58
59struct globals {
60 int filter_ifindex;
61 uint32_t filter_qdisc;
62 uint32_t filter_parent;
63 uint32_t filter_prio;
64 uint32_t filter_proto;
65} FIX_ALIASING;
66#define G (*(struct globals*)&bb_common_bufsiz1)
67struct BUG_G_too_big {
68 char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
69};
70#define filter_ifindex (G.filter_ifindex)
71#define filter_qdisc (G.filter_qdisc)
72#define filter_parent (G.filter_parent)
73#define filter_prio (G.filter_prio)
74#define filter_proto (G.filter_proto)
75#define INIT_G() do { } while (0)
76
77/* Allocates a buffer containing the name of a class id.
78 * The caller must free the returned memory. */
79static char* print_tc_classid(uint32_t cid)
80{
81#if 0 /* IMPOSSIBLE */
82 if (cid == TC_H_ROOT)
83 return xasprintf("root");
84 else
85#endif
86 if (cid == TC_H_UNSPEC)
87 return xasprintf("none");
88 else if (TC_H_MAJ(cid) == 0)
89 return xasprintf(":%x", TC_H_MIN(cid));
90 else if (TC_H_MIN(cid) == 0)
91 return xasprintf("%x:", TC_H_MAJ(cid)>>16);
92 else
93 return xasprintf("%x:%x", TC_H_MAJ(cid)>>16, TC_H_MIN(cid));
94}
95
96/* Get a qdisc handle. Return 0 on success, !0 otherwise. */
97static int get_qdisc_handle(uint32_t *h, const char *str) {
98 uint32_t maj;
99 char *p;
100
101 maj = TC_H_UNSPEC;
102 if (!strcmp(str, "none"))
103 goto ok;
104 maj = strtoul(str, &p, 16);
105 if (p == str)
106 return 1;
107 maj <<= 16;
108 if (*p != ':' && *p != '\0')
109 return 1;
110 ok:
111 *h = maj;
112 return 0;
113}
114
115/* Get class ID. Return 0 on success, !0 otherwise. */
116static int get_tc_classid(uint32_t *h, const char *str) {
117 uint32_t maj, min;
118 char *p;
119
120 maj = TC_H_ROOT;
121 if (!strcmp(str, "root"))
122 goto ok;
123 maj = TC_H_UNSPEC;
124 if (!strcmp(str, "none"))
125 goto ok;
126 maj = strtoul(str, &p, 16);
127 if (p == str) {
128 if (*p != ':')
129 return 1;
130 maj = 0;
131 }
132 if (*p == ':') {
133 if (maj >= (1<<16))
134 return 1;
135 maj <<= 16;
136 str = p + 1;
137 min = strtoul(str, &p, 16);
138//FIXME: check for "" too?
139 if (*p != '\0' || min >= (1<<16))
140 return 1;
141 maj |= min;
142 } else if (*p != 0)
143 return 1;
144 ok:
145 *h = maj;
146 return 0;
147}
148
149static void print_rate(char *buf, int len, uint32_t rate)
150{
151 double tmp = (double)rate*8;
152
153 if (use_iec) {
154 if (tmp >= 1000.0*1024.0*1024.0)
155 snprintf(buf, len, "%.0fMibit", tmp/1024.0*1024.0);
156 else if (tmp >= 1000.0*1024)
157 snprintf(buf, len, "%.0fKibit", tmp/1024);
158 else
159 snprintf(buf, len, "%.0fbit", tmp);
160 } else {
161 if (tmp >= 1000.0*1000000.0)
162 snprintf(buf, len, "%.0fMbit", tmp/1000000.0);
163 else if (tmp >= 1000.0 * 1000.0)
164 snprintf(buf, len, "%.0fKbit", tmp/1000.0);
165 else
166 snprintf(buf, len, "%.0fbit", tmp);
167 }
168}
169
170/* This is "pfifo_fast". */
171static int prio_parse_opt(int argc, char **argv, struct nlmsghdr *n)
172{
173 return 0;
174}
175static int prio_print_opt(struct rtattr *opt)
176{
177 int i;
178 struct tc_prio_qopt *qopt;
179 struct rtattr *tb[TCA_PRIO_MAX+1];
180
181 if (opt == NULL)
182 return 0;
183 parse_rtattr_nested_compat(tb, TCA_PRIO_MAX, opt, qopt, sizeof(*qopt));
184 if (tb == NULL)
185 return 0;
186 printf("bands %u priomap ", qopt->bands);
187 for (i=0; i<=TC_PRIO_MAX; i++)
188 printf(" %d", qopt->priomap[i]);
189
190 if (tb[TCA_PRIO_MQ])
191 printf(" multiqueue: o%s ",
192 *(unsigned char *)RTA_DATA(tb[TCA_PRIO_MQ]) ? "n" : "ff");
193
194 return 0;
195}
196
197/* Class Based Queue */
198static int cbq_parse_opt(int argc, char **argv, struct nlmsghdr *n)
199{
200 return 0;
201}
202static int cbq_print_opt(struct rtattr *opt)
203{
204 struct rtattr *tb[TCA_CBQ_MAX+1];
205 struct tc_ratespec *r = NULL;
206 struct tc_cbq_lssopt *lss = NULL;
207 struct tc_cbq_wrropt *wrr = NULL;
208 struct tc_cbq_fopt *fopt = NULL;
209 struct tc_cbq_ovl *ovl = NULL;
210 const char *const error = "CBQ: too short %s opt";
211 char buf[64];
212
213 if (opt == NULL)
214 goto done;
215 parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);
216
217 if (tb[TCA_CBQ_RATE]) {
218 if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
219 bb_error_msg(error, "rate");
220 else
221 r = RTA_DATA(tb[TCA_CBQ_RATE]);
222 }
223 if (tb[TCA_CBQ_LSSOPT]) {
224 if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
225 bb_error_msg(error, "lss");
226 else
227 lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
228 }
229 if (tb[TCA_CBQ_WRROPT]) {
230 if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
231 bb_error_msg(error, "wrr");
232 else
233 wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
234 }
235 if (tb[TCA_CBQ_FOPT]) {
236 if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
237 bb_error_msg(error, "fopt");
238 else
239 fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
240 }
241 if (tb[TCA_CBQ_OVL_STRATEGY]) {
242 if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
243 bb_error_msg("CBQ: too short overlimit strategy %u/%u",
244 (unsigned) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
245 (unsigned) sizeof(*ovl));
246 else
247 ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
248 }
249
250 if (r) {
251 print_rate(buf, sizeof(buf), r->rate);
252 printf("rate %s ", buf);
253 if (show_details) {
254 printf("cell %ub ", 1<<r->cell_log);
255 if (r->mpu)
256 printf("mpu %ub ", r->mpu);
257 if (r->overhead)
258 printf("overhead %ub ", r->overhead);
259 }
260 }
261 if (lss && lss->flags) {
262 bool comma = false;
263 bb_putchar('(');
264 if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
265 printf("bounded");
266 comma = true;
267 }
268 if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
269 if (comma)
270 bb_putchar(',');
271 printf("isolated");
272 }
273 printf(") ");
274 }
275 if (wrr) {
276 if (wrr->priority != TC_CBQ_MAXPRIO)
277 printf("prio %u", wrr->priority);
278 else
279 printf("prio no-transmit");
280 if (show_details) {
281 printf("/%u ", wrr->cpriority);
282 if (wrr->weight != 1) {
283 print_rate(buf, sizeof(buf), wrr->weight);
284 printf("weight %s ", buf);
285 }
286 if (wrr->allot)
287 printf("allot %ub ", wrr->allot);
288 }
289 }
290 done:
291 return 0;
292}
293
294static int print_qdisc(const struct sockaddr_nl *who UNUSED_PARAM,
295 struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
296{
297 struct tcmsg *msg = NLMSG_DATA(hdr);
298 int len = hdr->nlmsg_len;
299 struct rtattr * tb[TCA_MAX+1];
300 char *name;
301
302 if (hdr->nlmsg_type != RTM_NEWQDISC && hdr->nlmsg_type != RTM_DELQDISC) {
303 /* bb_error_msg("not a qdisc"); */
304 return 0; /* ??? mimic upstream; should perhaps return -1 */
305 }
306 len -= NLMSG_LENGTH(sizeof(*msg));
307 if (len < 0) {
308 /* bb_error_msg("wrong len %d", len); */
309 return -1;
310 }
311 /* not the desired interface? */
312 if (filter_ifindex && filter_ifindex != msg->tcm_ifindex)
313 return 0;
314 memset (tb, 0, sizeof(tb));
315 parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
316 if (tb[TCA_KIND] == NULL) {
317 /* bb_error_msg("%s: NULL kind", "qdisc"); */
318 return -1;
319 }
320 if (hdr->nlmsg_type == RTM_DELQDISC)
321 printf("deleted ");
322 name = (char*)RTA_DATA(tb[TCA_KIND]);
323 printf("qdisc %s %x: ", name, msg->tcm_handle>>16);
324 if (filter_ifindex == 0)
325 printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
326 if (msg->tcm_parent == TC_H_ROOT)
327 printf("root ");
328 else if (msg->tcm_parent) {
329 char *classid = print_tc_classid(msg->tcm_parent);
330 printf("parent %s ", classid);
331 if (ENABLE_FEATURE_CLEAN_UP)
332 free(classid);
333 }
334 if (msg->tcm_info != 1)
335 printf("refcnt %d ", msg->tcm_info);
336 if (tb[TCA_OPTIONS]) {
337 static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
338 int qqq = index_in_strings(_q_, name);
339 if (qqq == 0) { /* pfifo_fast aka prio */
340 prio_print_opt(tb[TCA_OPTIONS]);
341 } else if (qqq == 1) { /* class based queuing */
342 cbq_print_opt(tb[TCA_OPTIONS]);
343 } else
344 bb_error_msg("unknown %s", name);
345 }
346 bb_putchar('\n');
347 return 0;
348}
349
350static int print_class(const struct sockaddr_nl *who UNUSED_PARAM,
351 struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
352{
353 struct tcmsg *msg = NLMSG_DATA(hdr);
354 int len = hdr->nlmsg_len;
355 struct rtattr * tb[TCA_MAX+1];
356 char *name, *classid;
357
358 /*XXX Eventually factor out common code */
359
360 if (hdr->nlmsg_type != RTM_NEWTCLASS && hdr->nlmsg_type != RTM_DELTCLASS) {
361 /* bb_error_msg("not a class"); */
362 return 0; /* ??? mimic upstream; should perhaps return -1 */
363 }
364 len -= NLMSG_LENGTH(sizeof(*msg));
365 if (len < 0) {
366 /* bb_error_msg("wrong len %d", len); */
367 return -1;
368 }
369 /* not the desired interface? */
370 if (filter_qdisc && TC_H_MAJ(msg->tcm_handle^filter_qdisc))
371 return 0;
372 memset (tb, 0, sizeof(tb));
373 parse_rtattr(tb, TCA_MAX, TCA_RTA(msg), len);
374 if (tb[TCA_KIND] == NULL) {
375 /* bb_error_msg("%s: NULL kind", "class"); */
376 return -1;
377 }
378 if (hdr->nlmsg_type == RTM_DELTCLASS)
379 printf("deleted ");
380
381 name = (char*)RTA_DATA(tb[TCA_KIND]);
382 classid = !msg->tcm_handle ? NULL : print_tc_classid(
383 filter_qdisc ? TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
384 printf ("class %s %s", name, classid);
385 if (ENABLE_FEATURE_CLEAN_UP)
386 free(classid);
387
388 if (filter_ifindex == 0)
389 printf("dev %s ", ll_index_to_name(msg->tcm_ifindex));
390 if (msg->tcm_parent == TC_H_ROOT)
391 printf("root ");
392 else if (msg->tcm_parent) {
393 classid = print_tc_classid(filter_qdisc ?
394 TC_H_MIN(msg->tcm_parent) : msg->tcm_parent);
395 printf("parent %s ", classid);
396 if (ENABLE_FEATURE_CLEAN_UP)
397 free(classid);
398 }
399 if (msg->tcm_info)
400 printf("leaf %x ", msg->tcm_info >> 16);
401 /* Do that get_qdisc_kind(RTA_DATA(tb[TCA_KIND])). */
402 if (tb[TCA_OPTIONS]) {
403 static const char _q_[] ALIGN1 = "pfifo_fast\0""cbq\0";
404 int qqq = index_in_strings(_q_, name);
405 if (qqq == 0) { /* pfifo_fast aka prio */
406 /* nothing. */ /*prio_print_opt(tb[TCA_OPTIONS]);*/
407 } else if (qqq == 1) { /* class based queuing */
408 /* cbq_print_copt() is identical to cbq_print_opt(). */
409 cbq_print_opt(tb[TCA_OPTIONS]);
410 } else
411 bb_error_msg("unknown %s", name);
412 }
413 bb_putchar('\n');
414
415 return 0;
416}
417
418static int print_filter(const struct sockaddr_nl *who UNUSED_PARAM,
419 struct nlmsghdr *hdr, void *arg UNUSED_PARAM)
420{
421 struct tcmsg *msg = NLMSG_DATA(hdr);
422 int len = hdr->nlmsg_len;
423 struct rtattr * tb[TCA_MAX+1];
424 return 0;
425}
426
427int tc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
428int tc_main(int argc UNUSED_PARAM, char **argv)
429{
430 static const char objects[] ALIGN1 =
431 "qdisc\0""class\0""filter\0"
432 ;
433 enum { OBJ_qdisc = 0, OBJ_class, OBJ_filter };
434 static const char commands[] ALIGN1 =
435 "add\0""delete\0""change\0"
436 "link\0" /* only qdisc */
437 "replace\0"
438 "show\0""list\0"
439 ;
440 static const char args[] ALIGN1 =
441 "dev\0" /* qdisc, class, filter */
442 "root\0" /* class, filter */
443 "parent\0" /* class, filter */
444 "qdisc\0" /* class */
445 "handle\0" /* change: qdisc, class(classid) list: filter */
446 "classid\0" /* change: for class use "handle" */
447 "preference\0""priority\0""protocol\0" /* filter */
448 ;
449 enum { CMD_add = 0, CMD_del, CMD_change, CMD_link, CMD_replace, CMD_show };
450 enum { ARG_dev = 0, ARG_root, ARG_parent, ARG_qdisc,
451 ARG_handle, ARG_classid, ARG_pref, ARG_prio, ARG_proto};
452 struct rtnl_handle rth;
453 struct tcmsg msg;
454 int ret, obj, cmd, arg;
455 char *dev = NULL;
456
457 INIT_G();
458
459 if (!*++argv)
460 bb_show_usage();
461 xrtnl_open(&rth);
462 ret = EXIT_SUCCESS;
463
464 obj = index_in_substrings(objects, *argv++);
465
466 if (obj < OBJ_qdisc)
467 bb_show_usage();
468 if (!*argv)
469 cmd = CMD_show; /* list is the default */
470 else {
471 cmd = index_in_substrings(commands, *argv);
472 if (cmd < 0)
473 bb_error_msg_and_die(bb_msg_invalid_arg, *argv, applet_name);
474 argv++;
475 }
476 memset(&msg, 0, sizeof(msg));
477 msg.tcm_family = AF_UNSPEC;
478 ll_init_map(&rth);
479 while (*argv) {
480 arg = index_in_substrings(args, *argv);
481 if (arg == ARG_dev) {
482 NEXT_ARG();
483 if (dev)
484 duparg2("dev", *argv);
485 dev = *argv++;
486 msg.tcm_ifindex = xll_name_to_index(dev);
487 if (cmd >= CMD_show)
488 filter_ifindex = msg.tcm_ifindex;
489 } else
490 if ((arg == ARG_qdisc && obj == OBJ_class && cmd >= CMD_show)
491 || (arg == ARG_handle && obj == OBJ_qdisc && cmd == CMD_change)
492 ) {
493 NEXT_ARG();
494 /* We don't care about duparg2("qdisc handle",*argv) for now */
495 if (get_qdisc_handle(&filter_qdisc, *argv))
496 invarg(*argv, "qdisc");
497 } else
498 if (obj != OBJ_qdisc
499 && (arg == ARG_root
500 || arg == ARG_parent
501 || (obj == OBJ_filter && arg >= ARG_pref)
502 )
503 ) {
504 /* nothing */
505 } else {
506 invarg(*argv, "command");
507 }
508 NEXT_ARG();
509 if (arg == ARG_root) {
510 if (msg.tcm_parent)
511 duparg("parent", *argv);
512 msg.tcm_parent = TC_H_ROOT;
513 if (obj == OBJ_filter)
514 filter_parent = TC_H_ROOT;
515 } else if (arg == ARG_parent) {
516 uint32_t handle;
517 if (msg.tcm_parent)
518 duparg(*argv, "parent");
519 if (get_tc_classid(&handle, *argv))
520 invarg(*argv, "parent");
521 msg.tcm_parent = handle;
522 if (obj == OBJ_filter)
523 filter_parent = handle;
524 } else if (arg == ARG_handle) { /* filter::list */
525 if (msg.tcm_handle)
526 duparg(*argv, "handle");
527 /* reject LONG_MIN || LONG_MAX */
528 /* TODO: for fw
529 slash = strchr(handle, '/');
530 if (slash != NULL)
531 *slash = '\0';
532 */
533 msg.tcm_handle = get_u32(*argv, "handle");
534 /* if (slash) {if (get_u32(uint32_t &mask, slash+1, NULL)) inv mask; addattr32(n, MAX_MSG, TCA_FW_MASK, mask); */
535 } else if (arg == ARG_classid && obj == OBJ_class && cmd == CMD_change){
536 } else if (arg == ARG_pref || arg == ARG_prio) { /* filter::list */
537 if (filter_prio)
538 duparg(*argv, "priority");
539 filter_prio = get_u32(*argv, "priority");
540 } else if (arg == ARG_proto) { /* filter::list */
541 uint16_t tmp;
542 if (filter_proto)
543 duparg(*argv, "protocol");
544 if (ll_proto_a2n(&tmp, *argv))
545 invarg(*argv, "protocol");
546 filter_proto = tmp;
547 }
548 }
549 if (cmd >= CMD_show) { /* show or list */
550 if (obj == OBJ_filter)
551 msg.tcm_info = TC_H_MAKE(filter_prio<<16, filter_proto);
552 if (rtnl_dump_request(&rth, obj == OBJ_qdisc ? RTM_GETQDISC :
553 obj == OBJ_class ? RTM_GETTCLASS : RTM_GETTFILTER,
554 &msg, sizeof(msg)) < 0)
555 bb_simple_perror_msg_and_die("can't send dump request");
556
557 xrtnl_dump_filter(&rth, obj == OBJ_qdisc ? print_qdisc :
558 obj == OBJ_class ? print_class : print_filter,
559 NULL);
560 }
561 if (ENABLE_FEATURE_CLEAN_UP) {
562 rtnl_close(&rth);
563 }
564 return ret;
565}
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