libnl 3.5.0

qdisc.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3 * lib/route/qdisc.c Queueing Disciplines
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation version 2.1
8 * of the License.
9 *
10 * Copyright (c) 2003-2011 Thomas Graf <tgraf@suug.ch>
11 */
12
13 /**
14 * @ingroup tc
15 * @defgroup qdisc Queueing Disciplines
16 * @{
17 */
18
19 #include <netlink-private/netlink.h>
20 #include <netlink-private/tc.h>
21 #include <netlink/netlink.h>
22 #include <netlink/utils.h>
23 #include <netlink/route/link.h>
24 #include <netlink-private/route/tc-api.h>
25 #include <netlink/route/qdisc.h>
26 #include <netlink/route/class.h>
27 #include <netlink/route/classifier.h>
28
29 static struct nl_cache_ops rtnl_qdisc_ops;
30 static struct nl_object_ops qdisc_obj_ops;
31
32 static int qdisc_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who,
33 struct nlmsghdr *n, struct nl_parser_param *pp)
34 {
35 struct rtnl_qdisc *qdisc;
36 int err;
37
38 if (!(qdisc = rtnl_qdisc_alloc()))
39 return -NLE_NOMEM;
40
41 if ((err = rtnl_tc_msg_parse(n, TC_CAST(qdisc))) < 0)
42 goto errout;
43
44 err = pp->pp_cb(OBJ_CAST(qdisc), pp);
45 errout:
46 rtnl_qdisc_put(qdisc);
47
48 return err;
49 }
50
51 static int qdisc_request_update(struct nl_cache *c, struct nl_sock *sk)
52 {
53 struct tcmsg tchdr = {
54 .tcm_family = AF_UNSPEC,
55 .tcm_ifindex = c->c_iarg1,
56 };
57
58 return nl_send_simple(sk, RTM_GETQDISC, NLM_F_DUMP, &tchdr,
59 sizeof(tchdr));
60 }
61
62 /**
63 * @name Allocation/Freeing
64 * @{
65 */
66
67 struct rtnl_qdisc *rtnl_qdisc_alloc(void)
68 {
69 struct rtnl_tc *tc;
70
71 tc = TC_CAST(nl_object_alloc(&qdisc_obj_ops));
72 if (tc)
73 tc->tc_type = RTNL_TC_TYPE_QDISC;
74
75 return (struct rtnl_qdisc *) tc;
76 }
77
78 void rtnl_qdisc_put(struct rtnl_qdisc *qdisc)
79 {
80 nl_object_put((struct nl_object *) qdisc);
81 }
82
83 /** @} */
84
85 /**
86 * @name Addition / Modification / Deletion
87 * @{
88 */
89
90 static int build_qdisc_msg(struct rtnl_qdisc *qdisc, int type, int flags,
91 struct nl_msg **result)
92 {
93 if (!(qdisc->ce_mask & TCA_ATTR_IFINDEX)) {
94 APPBUG("ifindex must be specified");
95 return -NLE_MISSING_ATTR;
96 }
97
98 return rtnl_tc_msg_build(TC_CAST(qdisc), type, flags, result);
99 }
100
101 /**
102 * Build a netlink message requesting the addition of a qdisc
103 * @arg qdisc Qdisc to add
104 * @arg flags Additional netlink message flags
105 * @arg result Pointer to store resulting netlink message
106 *
107 * The behaviour of this function is identical to rtnl_qdisc_add() with
108 * the exception that it will not send the message but return it int the
109 * provided return pointer instead.
110 *
111 * @see rtnl_qdisc_add()
112 *
113 * @return 0 on success or a negative error code.
114 */
115 int rtnl_qdisc_build_add_request(struct rtnl_qdisc *qdisc, int flags,
116 struct nl_msg **result)
117 {
118 if (!(qdisc->ce_mask & (TCA_ATTR_HANDLE | TCA_ATTR_PARENT))) {
119 APPBUG("handle or parent must be specified");
120 return -NLE_MISSING_ATTR;
121 }
122
123 return build_qdisc_msg(qdisc, RTM_NEWQDISC, flags, result);
124 }
125
126 /**
127 * Add qdisc
128 * @arg sk Netlink socket
129 * @arg qdisc Qdisc to add
130 * @arg flags Additional netlink message flags
131 *
132 * Builds a \c RTM_NEWQDISC netlink message requesting the addition
133 * of a new qdisc and sends the message to the kernel. The configuration
134 * of the qdisc is derived from the attributes of the specified qdisc.
135 *
136 * The following flags may be specified:
137 * - \c NLM_F_CREATE: Create qdisc if it does not exist, otherwise
138 * -NLE_OBJ_NOTFOUND is returned.
139 * - \c NLM_F_REPLACE: If another qdisc is already attached to the
140 * parent, replace it even if the handles mismatch.
141 * - \c NLM_F_EXCL: Return -NLE_EXISTS if a qdisc with matching
142 * handle exists already.
143 *
144 * Existing qdiscs with matching handles will be updated, unless the
145 * flag \c NLM_F_EXCL is specified. If their handles do not match, the
146 * error -NLE_EXISTS is returned unless the flag \c NLM_F_REPLACE is
147 * specified in which case the existing qdisc is replaced with the new
148 * one. If no matching qdisc exists, it will be created if the flag
149 * \c NLM_F_CREATE is set, otherwise the error -NLE_OBJ_NOTFOUND is
150 * returned.
151 *
152 * After sending, the function will wait for the ACK or an eventual
153 * error message to be received and will therefore block until the
154 * operation has been completed.
155 *
156 * @note Disabling auto-ack (nl_socket_disable_auto_ack()) will cause
157 * this function to return immediately after sending. In this case,
158 * it is the responsibility of the caller to handle any error
159 * messages returned.
160 *
161 * @return 0 on success or a negative error code.
162 */
163 int rtnl_qdisc_add(struct nl_sock *sk, struct rtnl_qdisc *qdisc, int flags)
164 {
165 struct nl_msg *msg;
166 int err;
167
168 if ((err = rtnl_qdisc_build_add_request(qdisc, flags, &msg)) < 0)
169 return err;
170
171 return nl_send_sync(sk, msg);
172 }
173
174 /**
175 * Build netlink message requesting the update of a qdisc
176 * @arg qdisc Qdisc to update
177 * @arg new Qdisc with updated attributes
178 * @arg flags Additional netlink message flags
179 * @arg result Pointer to store resulting netlink message
180 *
181 * The behaviour of this function is identical to rtnl_qdisc_update() with
182 * the exception that it will not send the message but return it in the
183 * provided return pointer instead.
184 *
185 * @see rtnl_qdisc_update()
186 *
187 * @return 0 on success or a negative error code.
188 */
189 int rtnl_qdisc_build_update_request(struct rtnl_qdisc *qdisc,
190 struct rtnl_qdisc *new, int flags,
191 struct nl_msg **result)
192 {
193 if (flags & (NLM_F_CREATE | NLM_F_EXCL)) {
194 APPBUG("NLM_F_CREATE and NLM_F_EXCL may not be used here, "
195 "use rtnl_qdisc_add()");
196 return -NLE_INVAL;
197 }
198
199 if (!(qdisc->ce_mask & TCA_ATTR_IFINDEX)) {
200 APPBUG("ifindex must be specified");
201 return -NLE_MISSING_ATTR;
202 }
203
204 if (!(qdisc->ce_mask & (TCA_ATTR_HANDLE | TCA_ATTR_PARENT))) {
205 APPBUG("handle or parent must be specified");
206 return -NLE_MISSING_ATTR;
207 }
208
209 rtnl_tc_set_ifindex(TC_CAST(new), qdisc->q_ifindex);
210
211 if (qdisc->ce_mask & TCA_ATTR_HANDLE)
212 rtnl_tc_set_handle(TC_CAST(new), qdisc->q_handle);
213
214 if (qdisc->ce_mask & TCA_ATTR_PARENT)
215 rtnl_tc_set_parent(TC_CAST(new), qdisc->q_parent);
216
217 return build_qdisc_msg(new, RTM_NEWQDISC, flags, result);
218 }
219
220 /**
221 * Update qdisc
222 * @arg sk Netlink socket
223 * @arg qdisc Qdisc to update
224 * @arg new Qdisc with updated attributes
225 * @arg flags Additional netlink message flags
226 *
227 * Builds a \c RTM_NEWQDISC netlink message requesting the update
228 * of an existing qdisc and sends the message to the kernel.
229 *
230 * This function is a varation of rtnl_qdisc_add() to update qdiscs
231 * if the qdisc to be updated is available as qdisc object. The
232 * behaviour is identical to the one of rtnl_qdisc_add except that
233 * before constructing the message, it copies the \c ifindex,
234 * \c handle, and \c parent from the original \p qdisc to the \p new
235 * qdisc.
236 *
237 * After sending, the function will wait for the ACK or an eventual
238 * error message to be received and will therefore block until the
239 * operation has been completed.
240 *
241 * @note Disabling auto-ack (nl_socket_disable_auto_ack()) will cause
242 * this function to return immediately after sending. In this case,
243 * it is the responsibility of the caller to handle any error
244 * messages returned.
245 *
246 * @return 0 on success or a negative error code.
247 */
248 int rtnl_qdisc_update(struct nl_sock *sk, struct rtnl_qdisc *qdisc,
249 struct rtnl_qdisc *new, int flags)
250 {
251 struct nl_msg *msg;
252 int err;
253
254 err = rtnl_qdisc_build_update_request(qdisc, new, flags, &msg);
255 if (err < 0)
256 return err;
257
258 return nl_send_sync(sk, msg);
259 }
260
261 /**
262 * Build netlink message requesting the deletion of a qdisc
263 * @arg qdisc Qdisc to delete
264 * @arg result Pointer to store resulting netlink message
265 *
266 * The behaviour of this function is identical to rtnl_qdisc_delete() with
267 * the exception that it will not send the message but return it in the
268 * provided return pointer instead.
269 *
270 * @see rtnl_qdisc_delete()
271 *
272 * @return 0 on success or a negative error code.
273 */
274 int rtnl_qdisc_build_delete_request(struct rtnl_qdisc *qdisc,
275 struct nl_msg **result)
276 {
277 struct nl_msg *msg;
278 struct tcmsg tchdr;
279 uint32_t required = TCA_ATTR_IFINDEX | TCA_ATTR_PARENT;
280
281 if ((qdisc->ce_mask & required) != required) {
282 APPBUG("ifindex and parent must be specified");
283 return -NLE_MISSING_ATTR;
284 }
285
286 if (!(msg = nlmsg_alloc_simple(RTM_DELQDISC, 0)))
287 return -NLE_NOMEM;
288
289 memset(&tchdr, 0, sizeof(tchdr));
290
291 tchdr.tcm_family = AF_UNSPEC;
292 tchdr.tcm_ifindex = qdisc->q_ifindex;
293 tchdr.tcm_parent = qdisc->q_parent;
294
295 if (qdisc->ce_mask & TCA_ATTR_HANDLE)
296 tchdr.tcm_handle = qdisc->q_handle;
297
298 if (nlmsg_append(msg, &tchdr, sizeof(tchdr), NLMSG_ALIGNTO) < 0)
299 goto nla_put_failure;
300
301 if (qdisc->ce_mask & TCA_ATTR_KIND)
302 NLA_PUT_STRING(msg, TCA_KIND, qdisc->q_kind);
303
304 *result = msg;
305 return 0;
306
307 nla_put_failure:
308 nlmsg_free(msg);
309 return -NLE_MSGSIZE;
310 }
311
312 /**
313 * Delete qdisc
314 * @arg sk Netlink socket
315 * @arg qdisc Qdisc to add
316 *
317 * Builds a \c RTM_NEWQDISC netlink message requesting the deletion
318 * of a qdisc and sends the message to the kernel.
319 *
320 * The message is constructed out of the following attributes:
321 * - \c ifindex and \c parent
322 * - \c handle (optional, must match if provided)
323 * - \c kind (optional, must match if provided)
324 *
325 * All other qdisc attributes including all qdisc type specific
326 * attributes are ignored.
327 *
328 * After sending, the function will wait for the ACK or an eventual
329 * error message to be received and will therefore block until the
330 * operation has been completed.
331 *
332 * @note It is not possible to delete default qdiscs.
333 *
334 * @note Disabling auto-ack (nl_socket_disable_auto_ack()) will cause
335 * this function to return immediately after sending. In this case,
336 * it is the responsibility of the caller to handle any error
337 * messages returned.
338 *
339 * @return 0 on success or a negative error code.
340 */
341 int rtnl_qdisc_delete(struct nl_sock *sk, struct rtnl_qdisc *qdisc)
342 {
343 struct nl_msg *msg;
344 int err;
345
346 if ((err = rtnl_qdisc_build_delete_request(qdisc, &msg)) < 0)
347 return err;
348
349 return nl_send_sync(sk, msg);
350 }
351
352 /** @} */
353
354 /**
355 * @name Cache Related Functions
356 * @{
357 */
358
359 /**
360 * Allocate a cache and fill it with all configured qdiscs
361 * @arg sk Netlink socket
362 * @arg result Pointer to store the created cache
363 *
364 * Allocates a new qdisc cache and fills it with a list of all configured
365 * qdiscs on all network devices. Release the cache with nl_cache_free().
366 *
367 * @return 0 on success or a negative error code.
368 */
369 int rtnl_qdisc_alloc_cache(struct nl_sock *sk, struct nl_cache **result)
370 {
371 return nl_cache_alloc_and_fill(&rtnl_qdisc_ops, sk, result);
372 }
373
374 /**
375 * Search qdisc by interface index and parent
376 * @arg cache Qdisc cache
377 * @arg ifindex Interface index
378 * @arg parent Handle of parent qdisc
379 *
380 * Searches a qdisc cache previously allocated with rtnl_qdisc_alloc_cache()
381 * and searches for a qdisc matching the interface index and parent qdisc.
382 *
383 * The reference counter is incremented before returning the qdisc, therefore
384 * the reference must be given back with rtnl_qdisc_put() after usage.
385 *
386 * @return pointer to qdisc inside the cache or NULL if no match was found.
387 */
388 struct rtnl_qdisc *rtnl_qdisc_get_by_parent(struct nl_cache *cache,
389 int ifindex, uint32_t parent)
390 {
391 struct rtnl_qdisc *q;
392
393 if (cache->c_ops != &rtnl_qdisc_ops)
394 return NULL;
395
396 nl_list_for_each_entry(q, &cache->c_items, ce_list) {
397 if (q->q_parent == parent && q->q_ifindex == ifindex) {
398 nl_object_get((struct nl_object *) q);
399 return q;
400 }
401 }
402
403 return NULL;
404 }
405
406 /**
407 * Search qdisc by interface index and handle
408 * @arg cache Qdisc cache
409 * @arg ifindex Interface index
410 * @arg handle Handle
411 *
412 * Searches a qdisc cache previously allocated with rtnl_qdisc_alloc_cache()
413 * and searches for a qdisc matching the interface index and handle.
414 *
415 * The reference counter is incremented before returning the qdisc, therefore
416 * the reference must be given back with rtnl_qdisc_put() after usage.
417 *
418 * @return Qdisc or NULL if no match was found.
419 */
420 struct rtnl_qdisc *rtnl_qdisc_get(struct nl_cache *cache, int ifindex,
421 uint32_t handle)
422 {
423 struct rtnl_qdisc *q;
424
425 if (cache->c_ops != &rtnl_qdisc_ops)
426 return NULL;
427
428 nl_list_for_each_entry(q, &cache->c_items, ce_list) {
429 if (q->q_handle == handle && q->q_ifindex == ifindex) {
430 nl_object_get((struct nl_object *) q);
431 return q;
432 }
433 }
434
435 return NULL;
436 }
437
438 /** @} */
439
440 /**
441 * @name Deprecated Functions
442 * @{
443 */
444
445 /**
446 * Call a callback for each child class of a qdisc (deprecated)
447 *
448 * @deprecated Use of this function is deprecated, it does not allow
449 * to handle the out of memory situation that can occur.
450 */
451 void rtnl_qdisc_foreach_child(struct rtnl_qdisc *qdisc, struct nl_cache *cache,
452 void (*cb)(struct nl_object *, void *), void *arg)
453 {
454 struct rtnl_class *filter;
455
456 filter = rtnl_class_alloc();
457 if (!filter)
458 return;
459
460 rtnl_tc_set_parent(TC_CAST(filter), qdisc->q_handle);
461 rtnl_tc_set_ifindex(TC_CAST(filter), qdisc->q_ifindex);
462 rtnl_tc_set_kind(TC_CAST(filter), qdisc->q_kind);
463
464 nl_cache_foreach_filter(cache, OBJ_CAST(filter), cb, arg);
465
466 rtnl_class_put(filter);
467 }
468
469 /**
470 * Call a callback for each filter attached to the qdisc (deprecated)
471 *
472 * @deprecated Use of this function is deprecated, it does not allow
473 * to handle the out of memory situation that can occur.
474 */
475 void rtnl_qdisc_foreach_cls(struct rtnl_qdisc *qdisc, struct nl_cache *cache,
476 void (*cb)(struct nl_object *, void *), void *arg)
477 {
478 struct rtnl_cls *filter;
479
480 if (!(filter = rtnl_cls_alloc()))
481 return;
482
483 rtnl_tc_set_ifindex(TC_CAST(filter), qdisc->q_ifindex);
484 rtnl_tc_set_parent(TC_CAST(filter), qdisc->q_parent);
485
486 nl_cache_foreach_filter(cache, OBJ_CAST(filter), cb, arg);
487 rtnl_cls_put(filter);
488 }
489
490 /**
491 * Build a netlink message requesting the update of a qdisc
492 *
493 * @deprecated Use of this function is deprecated in favour of
494 * rtnl_qdisc_build_update_request() due to the missing
495 * possibility of specifying additional flags.
496 */
497 int rtnl_qdisc_build_change_request(struct rtnl_qdisc *qdisc,
498 struct rtnl_qdisc *new,
499 struct nl_msg **result)
500 {
501 return rtnl_qdisc_build_update_request(qdisc, new, NLM_F_REPLACE,
502 result);
503 }
504
505 /**
506 * Change attributes of a qdisc
507 *
508 * @deprecated Use of this function is deprecated in favour of
509 * rtnl_qdisc_update() due to the missing possibility of
510 * specifying additional flags.
511 */
512 int rtnl_qdisc_change(struct nl_sock *sk, struct rtnl_qdisc *qdisc,
513 struct rtnl_qdisc *new)
514 {
515 return rtnl_qdisc_update(sk, qdisc, new, NLM_F_REPLACE);
516 }
517
518 /** @} */
519
520 static void qdisc_dump_details(struct rtnl_tc *tc, struct nl_dump_params *p)
521 {
522 struct rtnl_qdisc *qdisc = (struct rtnl_qdisc *) tc;
523
524 nl_dump(p, "refcnt %u", qdisc->q_info);
525 }
526
527 static struct rtnl_tc_type_ops qdisc_ops = {
528 .tt_type = RTNL_TC_TYPE_QDISC,
529 .tt_dump_prefix = "qdisc",
530 .tt_dump = {
531 [NL_DUMP_DETAILS] = qdisc_dump_details,
532 },
533 };
534
535 static struct nl_cache_ops rtnl_qdisc_ops = {
536 .co_name = "route/qdisc",
537 .co_hdrsize = sizeof(struct tcmsg),
538 .co_msgtypes = {
539 { RTM_NEWQDISC, NL_ACT_NEW, "new" },
540 { RTM_DELQDISC, NL_ACT_DEL, "del" },
541 { RTM_GETQDISC, NL_ACT_GET, "get" },
542 END_OF_MSGTYPES_LIST,
543 },
544 .co_protocol = NETLINK_ROUTE,
545 .co_groups = tc_groups,
546 .co_request_update = qdisc_request_update,
547 .co_msg_parser = qdisc_msg_parser,
548 .co_obj_ops = &qdisc_obj_ops,
549 };
550
551 static struct nl_object_ops qdisc_obj_ops = {
552 .oo_name = "route/qdisc",
553 .oo_size = sizeof(struct rtnl_qdisc),
554 .oo_free_data = rtnl_tc_free_data,
555 .oo_clone = rtnl_tc_clone,
556 .oo_dump = {
557 [NL_DUMP_LINE] = rtnl_tc_dump_line,
558 [NL_DUMP_DETAILS] = rtnl_tc_dump_details,
559 [NL_DUMP_STATS] = rtnl_tc_dump_stats,
560 },
561 .oo_compare = rtnl_tc_compare,
562 .oo_id_attrs = (TCA_ATTR_IFINDEX | TCA_ATTR_HANDLE),
563 };
564
565 static void __init qdisc_init(void)
566 {
567 rtnl_tc_type_register(&qdisc_ops);
568 nl_cache_mngt_register(&rtnl_qdisc_ops);
569 }
570
571 static void __exit qdisc_exit(void)
572 {
573 nl_cache_mngt_unregister(&rtnl_qdisc_ops);
574 rtnl_tc_type_unregister(&qdisc_ops);
575 }
576
577 /** @} */
NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:22
rtnl_qdisc_get_by_parent
struct rtnl_qdisc * rtnl_qdisc_get_by_parent(struct nl_cache *cache, int ifindex, uint32_t parent)
Search qdisc by interface index and parent.
Definition: qdisc.c:388
nlmsg_free
void nlmsg_free(struct nl_msg *msg)
Release a reference from an netlink message.
Definition: msg.c:565
rtnl_tc_set_kind
int rtnl_tc_set_kind(struct rtnl_tc *tc, const char *kind)
Define the type of traffic control object.
Definition: tc.c:530
nl_object_alloc
struct nl_object * nl_object_alloc(struct nl_object_ops *ops)
Allocate a new object of kind specified by the operations handle.
Definition: object.c:55
rtnl_qdisc_foreach_cls
void rtnl_qdisc_foreach_cls(struct rtnl_qdisc *qdisc, struct nl_cache *cache, void(*cb)(struct nl_object *, void *), void *arg)
Call a callback for each filter attached to the qdisc (deprecated)
Definition: qdisc.c:475
nl_cache_mngt_unregister
int nl_cache_mngt_unregister(struct nl_cache_ops *ops)
Unregister a set of cache operations.
Definition: cache_mngt.c:288
rtnl_qdisc_change
int rtnl_qdisc_change(struct nl_sock *sk, struct rtnl_qdisc *qdisc, struct rtnl_qdisc *new)
Change attributes of a qdisc.
Definition: qdisc.c:512
nl_object_get
void nl_object_get(struct nl_object *obj)
Acquire a reference on a object.
Definition: object.c:205
nl_send_sync
int nl_send_sync(struct nl_sock *sk, struct nl_msg *msg)
Finalize and transmit Netlink message and wait for ACK or error message.
Definition: nl.c:549
rtnl_qdisc_add
int rtnl_qdisc_add(struct nl_sock *sk, struct rtnl_qdisc *qdisc, int flags)
Add qdisc.
Definition: qdisc.c:163
rtnl_tc_set_parent
void rtnl_tc_set_parent(struct rtnl_tc *tc, uint32_t parent)
Set the parent identifier of a traffic control object.
Definition: tc.c:508
rtnl_qdisc_alloc_cache
int rtnl_qdisc_alloc_cache(struct nl_sock *sk, struct nl_cache **result)
Allocate a cache and fill it with all configured qdiscs.
Definition: qdisc.c:369
nl_cache_foreach_filter
void nl_cache_foreach_filter(struct nl_cache *cache, struct nl_object *filter, void(*cb)(struct nl_object *, void *), void *arg)
Call a callback on each element of the cache (filtered).
Definition: cache.c:1283
rtnl_qdisc_build_add_request
int rtnl_qdisc_build_add_request(struct rtnl_qdisc *qdisc, int flags, struct nl_msg **result)
Build a netlink message requesting the addition of a qdisc.
Definition: qdisc.c:115
NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:23
nl_cache_mngt_register
int nl_cache_mngt_register(struct nl_cache_ops *ops)
Register a set of cache operations.
Definition: cache_mngt.c:253
rtnl_qdisc_update
int rtnl_qdisc_update(struct nl_sock *sk, struct rtnl_qdisc *qdisc, struct rtnl_qdisc *new, int flags)
Update qdisc.
Definition: qdisc.c:248
rtnl_qdisc_build_change_request
int rtnl_qdisc_build_change_request(struct rtnl_qdisc *qdisc, struct rtnl_qdisc *new, struct nl_msg **result)
Build a netlink message requesting the update of a qdisc.
Definition: qdisc.c:497
rtnl_qdisc_build_update_request
int rtnl_qdisc_build_update_request(struct rtnl_qdisc *qdisc, struct rtnl_qdisc *new, int flags, struct nl_msg **result)
Build netlink message requesting the update of a qdisc.
Definition: qdisc.c:189
rtnl_tc_set_ifindex
void rtnl_tc_set_ifindex(struct rtnl_tc *tc, int ifindex)
Set interface index of traffic control object.
Definition: tc.c:279
TC_CAST
#define TC_CAST(ptr)
Macro to cast qdisc/class/classifier to tc object.
Definition: tc.h:56
rtnl_tc_set_handle
void rtnl_tc_set_handle(struct rtnl_tc *tc, uint32_t id)
Set identifier of traffic control object.
Definition: tc.c:487
rtnl_qdisc_get
struct rtnl_qdisc * rtnl_qdisc_get(struct nl_cache *cache, int ifindex, uint32_t handle)
Search qdisc by interface index and handle.
Definition: qdisc.c:420
nl_send_simple
int nl_send_simple(struct nl_sock *sk, int type, int flags, void *buf, size_t size)
Construct and transmit a Netlink message.
Definition: nl.c:581
rtnl_qdisc_build_delete_request
int rtnl_qdisc_build_delete_request(struct rtnl_qdisc *qdisc, struct nl_msg **result)
Build netlink message requesting the deletion of a qdisc.
Definition: qdisc.c:274
nlmsg_append
int nlmsg_append(struct nl_msg *n, void *data, size_t len, int pad)
Append data to tail of a netlink message.
Definition: msg.c:449
nl_object_put
void nl_object_put(struct nl_object *obj)
Release a reference from an object.
Definition: object.c:216
NLA_PUT_STRING
#define NLA_PUT_STRING(msg, attrtype, value)
Add string attribute to netlink message.
Definition: attr.h:263
nlmsg_alloc_simple
struct nl_msg * nlmsg_alloc_simple(int nlmsgtype, int flags)
Allocate a new netlink message.
Definition: msg.c:348
nl_dump_params
Dumping parameters.
Definition: types.h:33
rtnl_qdisc_delete
int rtnl_qdisc_delete(struct nl_sock *sk, struct rtnl_qdisc *qdisc)
Delete qdisc.
Definition: qdisc.c:341
nl_dump
void nl_dump(struct nl_dump_params *params, const char *fmt,...)
Dump a formatted character string.
Definition: utils.c:962
rtnl_qdisc_foreach_child
void rtnl_qdisc_foreach_child(struct rtnl_qdisc *qdisc, struct nl_cache *cache, void(*cb)(struct nl_object *, void *), void *arg)
Call a callback for each child class of a qdisc (deprecated)
Definition: qdisc.c:451
NL_DUMP_STATS
Dump all attributes including statistics.
Definition: types.h:24
nl_cache_alloc_and_fill
int nl_cache_alloc_and_fill(struct nl_cache_ops *ops, struct nl_sock *sock, struct nl_cache **result)
Allocate new cache and fill it.
Definition: cache.c:234