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 /** @} */
Dump object briefly on one line.
Definition: types.h:22
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
void nlmsg_free(struct nl_msg *msg)
Release a reference from an netlink message.
Definition: msg.c:565
int rtnl_tc_set_kind(struct rtnl_tc *tc, const char *kind)
Define the type of traffic control object.
Definition: tc.c:530
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
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
int nl_cache_mngt_unregister(struct nl_cache_ops *ops)
Unregister a set of cache operations.
Definition: cache_mngt.c:288
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
void nl_object_get(struct nl_object *obj)
Acquire a reference on a object.
Definition: object.c:205
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
int rtnl_qdisc_add(struct nl_sock *sk, struct rtnl_qdisc *qdisc, int flags)
Add qdisc.
Definition: qdisc.c:163
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
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
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
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
Dump all attributes but no statistics.
Definition: types.h:23
int nl_cache_mngt_register(struct nl_cache_ops *ops)
Register a set of cache operations.
Definition: cache_mngt.c:253
int rtnl_qdisc_update(struct nl_sock *sk, struct rtnl_qdisc *qdisc, struct rtnl_qdisc *new, int flags)
Update qdisc.
Definition: qdisc.c:248
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
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
void rtnl_tc_set_ifindex(struct rtnl_tc *tc, int ifindex)
Set interface index of traffic control object.
Definition: tc.c:279
#define TC_CAST(ptr)
Macro to cast qdisc/class/classifier to tc object.
Definition: tc.h:56
void rtnl_tc_set_handle(struct rtnl_tc *tc, uint32_t id)
Set identifier of traffic control object.
Definition: tc.c:487
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
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
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
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
void nl_object_put(struct nl_object *obj)
Release a reference from an object.
Definition: object.c:216
#define NLA_PUT_STRING(msg, attrtype, value)
Add string attribute to netlink message.
Definition: attr.h:263
struct nl_msg * nlmsg_alloc_simple(int nlmsgtype, int flags)
Allocate a new netlink message.
Definition: msg.c:348
Dumping parameters.
Definition: types.h:33
int rtnl_qdisc_delete(struct nl_sock *sk, struct rtnl_qdisc *qdisc)
Delete qdisc.
Definition: qdisc.c:341
void nl_dump(struct nl_dump_params *params, const char *fmt,...)
Dump a formatted character string.
Definition: utils.c:962
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
Dump all attributes including statistics.
Definition: types.h:24
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