libnl  3.7.0
qdisc.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * Copyright (c) 2003-2011 Thomas Graf <tgraf@suug.ch>
4  */
5 
6 /**
7  * @ingroup tc
8  * @defgroup qdisc Queueing Disciplines
9  * @{
10  */
11 
12 #include <netlink-private/netlink.h>
13 #include <netlink-private/tc.h>
14 #include <netlink/netlink.h>
15 #include <netlink/utils.h>
16 #include <netlink/route/link.h>
17 #include <netlink-private/route/tc-api.h>
18 #include <netlink/route/qdisc.h>
19 #include <netlink/route/class.h>
20 #include <netlink/route/classifier.h>
21 
22 static struct nl_cache_ops rtnl_qdisc_ops;
23 static struct nl_object_ops qdisc_obj_ops;
24 
25 static int qdisc_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who,
26  struct nlmsghdr *n, struct nl_parser_param *pp)
27 {
28  struct rtnl_qdisc *qdisc;
29  int err;
30 
31  if (!(qdisc = rtnl_qdisc_alloc()))
32  return -NLE_NOMEM;
33 
34  if ((err = rtnl_tc_msg_parse(n, TC_CAST(qdisc))) < 0)
35  goto errout;
36 
37  err = pp->pp_cb(OBJ_CAST(qdisc), pp);
38 errout:
39  rtnl_qdisc_put(qdisc);
40 
41  return err;
42 }
43 
44 static int qdisc_request_update(struct nl_cache *c, struct nl_sock *sk)
45 {
46  struct tcmsg tchdr = {
47  .tcm_family = AF_UNSPEC,
48  .tcm_ifindex = c->c_iarg1,
49  };
50 
51  return nl_send_simple(sk, RTM_GETQDISC, NLM_F_DUMP, &tchdr,
52  sizeof(tchdr));
53 }
54 
55 /**
56  * @name Allocation/Freeing
57  * @{
58  */
59 
60 struct rtnl_qdisc *rtnl_qdisc_alloc(void)
61 {
62  struct rtnl_tc *tc;
63 
64  tc = TC_CAST(nl_object_alloc(&qdisc_obj_ops));
65  if (tc)
66  tc->tc_type = RTNL_TC_TYPE_QDISC;
67 
68  return (struct rtnl_qdisc *) tc;
69 }
70 
71 void rtnl_qdisc_put(struct rtnl_qdisc *qdisc)
72 {
73  nl_object_put((struct nl_object *) qdisc);
74 }
75 
76 /** @} */
77 
78 /**
79  * @name Addition / Modification / Deletion
80  * @{
81  */
82 
83 static int build_qdisc_msg(struct rtnl_qdisc *qdisc, int type, int flags,
84  struct nl_msg **result)
85 {
86  if (!(qdisc->ce_mask & TCA_ATTR_IFINDEX)) {
87  APPBUG("ifindex must be specified");
88  return -NLE_MISSING_ATTR;
89  }
90 
91  return rtnl_tc_msg_build(TC_CAST(qdisc), type, flags, result);
92 }
93 
94 /**
95  * Build a netlink message requesting the addition of a qdisc
96  * @arg qdisc Qdisc to add
97  * @arg flags Additional netlink message flags
98  * @arg result Pointer to store resulting netlink message
99  *
100  * The behaviour of this function is identical to rtnl_qdisc_add() with
101  * the exception that it will not send the message but return it int the
102  * provided return pointer instead.
103  *
104  * @see rtnl_qdisc_add()
105  *
106  * @return 0 on success or a negative error code.
107  */
108 int rtnl_qdisc_build_add_request(struct rtnl_qdisc *qdisc, int flags,
109  struct nl_msg **result)
110 {
111  if (!(qdisc->ce_mask & (TCA_ATTR_HANDLE | TCA_ATTR_PARENT))) {
112  APPBUG("handle or parent must be specified");
113  return -NLE_MISSING_ATTR;
114  }
115 
116  return build_qdisc_msg(qdisc, RTM_NEWQDISC, flags, result);
117 }
118 
119 /**
120  * Add qdisc
121  * @arg sk Netlink socket
122  * @arg qdisc Qdisc to add
123  * @arg flags Additional netlink message flags
124  *
125  * Builds a \c RTM_NEWQDISC netlink message requesting the addition
126  * of a new qdisc and sends the message to the kernel. The configuration
127  * of the qdisc is derived from the attributes of the specified qdisc.
128  *
129  * The following flags may be specified:
130  * - \c NLM_F_CREATE: Create qdisc if it does not exist, otherwise
131  * -NLE_OBJ_NOTFOUND is returned.
132  * - \c NLM_F_REPLACE: If another qdisc is already attached to the
133  * parent, replace it even if the handles mismatch.
134  * - \c NLM_F_EXCL: Return -NLE_EXISTS if a qdisc with matching
135  * handle exists already.
136  *
137  * Existing qdiscs with matching handles will be updated, unless the
138  * flag \c NLM_F_EXCL is specified. If their handles do not match, the
139  * error -NLE_EXISTS is returned unless the flag \c NLM_F_REPLACE is
140  * specified in which case the existing qdisc is replaced with the new
141  * one. If no matching qdisc exists, it will be created if the flag
142  * \c NLM_F_CREATE is set, otherwise the error -NLE_OBJ_NOTFOUND is
143  * returned.
144  *
145  * After sending, the function will wait for the ACK or an eventual
146  * error message to be received and will therefore block until the
147  * operation has been completed.
148  *
149  * @note Disabling auto-ack (nl_socket_disable_auto_ack()) will cause
150  * this function to return immediately after sending. In this case,
151  * it is the responsibility of the caller to handle any error
152  * messages returned.
153  *
154  * @return 0 on success or a negative error code.
155  */
156 int rtnl_qdisc_add(struct nl_sock *sk, struct rtnl_qdisc *qdisc, int flags)
157 {
158  struct nl_msg *msg;
159  int err;
160 
161  if ((err = rtnl_qdisc_build_add_request(qdisc, flags, &msg)) < 0)
162  return err;
163 
164  return nl_send_sync(sk, msg);
165 }
166 
167 /**
168  * Build netlink message requesting the update of a qdisc
169  * @arg qdisc Qdisc to update
170  * @arg new Qdisc with updated attributes
171  * @arg flags Additional netlink message flags
172  * @arg result Pointer to store resulting netlink message
173  *
174  * The behaviour of this function is identical to rtnl_qdisc_update() with
175  * the exception that it will not send the message but return it in the
176  * provided return pointer instead.
177  *
178  * @see rtnl_qdisc_update()
179  *
180  * @return 0 on success or a negative error code.
181  */
182 int rtnl_qdisc_build_update_request(struct rtnl_qdisc *qdisc,
183  struct rtnl_qdisc *new, int flags,
184  struct nl_msg **result)
185 {
186  if (flags & (NLM_F_CREATE | NLM_F_EXCL)) {
187  APPBUG("NLM_F_CREATE and NLM_F_EXCL may not be used here, "
188  "use rtnl_qdisc_add()");
189  return -NLE_INVAL;
190  }
191 
192  if (!(qdisc->ce_mask & TCA_ATTR_IFINDEX)) {
193  APPBUG("ifindex must be specified");
194  return -NLE_MISSING_ATTR;
195  }
196 
197  if (!(qdisc->ce_mask & (TCA_ATTR_HANDLE | TCA_ATTR_PARENT))) {
198  APPBUG("handle or parent must be specified");
199  return -NLE_MISSING_ATTR;
200  }
201 
202  rtnl_tc_set_ifindex(TC_CAST(new), qdisc->q_ifindex);
203 
204  if (qdisc->ce_mask & TCA_ATTR_HANDLE)
205  rtnl_tc_set_handle(TC_CAST(new), qdisc->q_handle);
206 
207  if (qdisc->ce_mask & TCA_ATTR_PARENT)
208  rtnl_tc_set_parent(TC_CAST(new), qdisc->q_parent);
209 
210  return build_qdisc_msg(new, RTM_NEWQDISC, flags, result);
211 }
212 
213 /**
214  * Update qdisc
215  * @arg sk Netlink socket
216  * @arg qdisc Qdisc to update
217  * @arg new Qdisc with updated attributes
218  * @arg flags Additional netlink message flags
219  *
220  * Builds a \c RTM_NEWQDISC netlink message requesting the update
221  * of an existing qdisc and sends the message to the kernel.
222  *
223  * This function is a varation of rtnl_qdisc_add() to update qdiscs
224  * if the qdisc to be updated is available as qdisc object. The
225  * behaviour is identical to the one of rtnl_qdisc_add except that
226  * before constructing the message, it copies the \c ifindex,
227  * \c handle, and \c parent from the original \p qdisc to the \p new
228  * qdisc.
229  *
230  * After sending, the function will wait for the ACK or an eventual
231  * error message to be received and will therefore block until the
232  * operation has been completed.
233  *
234  * @note Disabling auto-ack (nl_socket_disable_auto_ack()) will cause
235  * this function to return immediately after sending. In this case,
236  * it is the responsibility of the caller to handle any error
237  * messages returned.
238  *
239  * @return 0 on success or a negative error code.
240  */
241 int rtnl_qdisc_update(struct nl_sock *sk, struct rtnl_qdisc *qdisc,
242  struct rtnl_qdisc *new, int flags)
243 {
244  struct nl_msg *msg;
245  int err;
246 
247  err = rtnl_qdisc_build_update_request(qdisc, new, flags, &msg);
248  if (err < 0)
249  return err;
250 
251  return nl_send_sync(sk, msg);
252 }
253 
254 /**
255  * Build netlink message requesting the deletion of a qdisc
256  * @arg qdisc Qdisc to delete
257  * @arg result Pointer to store resulting netlink message
258  *
259  * The behaviour of this function is identical to rtnl_qdisc_delete() with
260  * the exception that it will not send the message but return it in the
261  * provided return pointer instead.
262  *
263  * @see rtnl_qdisc_delete()
264  *
265  * @return 0 on success or a negative error code.
266  */
267 int rtnl_qdisc_build_delete_request(struct rtnl_qdisc *qdisc,
268  struct nl_msg **result)
269 {
270  struct nl_msg *msg;
271  struct tcmsg tchdr;
272  uint32_t required = TCA_ATTR_IFINDEX | TCA_ATTR_PARENT;
273 
274  if ((qdisc->ce_mask & required) != required) {
275  APPBUG("ifindex and parent must be specified");
276  return -NLE_MISSING_ATTR;
277  }
278 
279  if (!(msg = nlmsg_alloc_simple(RTM_DELQDISC, 0)))
280  return -NLE_NOMEM;
281 
282  memset(&tchdr, 0, sizeof(tchdr));
283 
284  tchdr.tcm_family = AF_UNSPEC;
285  tchdr.tcm_ifindex = qdisc->q_ifindex;
286  tchdr.tcm_parent = qdisc->q_parent;
287 
288  if (qdisc->ce_mask & TCA_ATTR_HANDLE)
289  tchdr.tcm_handle = qdisc->q_handle;
290 
291  if (nlmsg_append(msg, &tchdr, sizeof(tchdr), NLMSG_ALIGNTO) < 0)
292  goto nla_put_failure;
293 
294  if (qdisc->ce_mask & TCA_ATTR_KIND)
295  NLA_PUT_STRING(msg, TCA_KIND, qdisc->q_kind);
296 
297  *result = msg;
298  return 0;
299 
300 nla_put_failure:
301  nlmsg_free(msg);
302  return -NLE_MSGSIZE;
303 }
304 
305 /**
306  * Delete qdisc
307  * @arg sk Netlink socket
308  * @arg qdisc Qdisc to add
309  *
310  * Builds a \c RTM_NEWQDISC netlink message requesting the deletion
311  * of a qdisc and sends the message to the kernel.
312  *
313  * The message is constructed out of the following attributes:
314  * - \c ifindex and \c parent
315  * - \c handle (optional, must match if provided)
316  * - \c kind (optional, must match if provided)
317  *
318  * All other qdisc attributes including all qdisc type specific
319  * attributes are ignored.
320  *
321  * After sending, the function will wait for the ACK or an eventual
322  * error message to be received and will therefore block until the
323  * operation has been completed.
324  *
325  * @note It is not possible to delete default qdiscs.
326  *
327  * @note Disabling auto-ack (nl_socket_disable_auto_ack()) will cause
328  * this function to return immediately after sending. In this case,
329  * it is the responsibility of the caller to handle any error
330  * messages returned.
331  *
332  * @return 0 on success or a negative error code.
333  */
334 int rtnl_qdisc_delete(struct nl_sock *sk, struct rtnl_qdisc *qdisc)
335 {
336  struct nl_msg *msg;
337  int err;
338 
339  if ((err = rtnl_qdisc_build_delete_request(qdisc, &msg)) < 0)
340  return err;
341 
342  return nl_send_sync(sk, msg);
343 }
344 
345 /** @} */
346 
347 /**
348  * @name Cache Related Functions
349  * @{
350  */
351 
352 /**
353  * Allocate a cache and fill it with all configured qdiscs
354  * @arg sk Netlink socket
355  * @arg result Pointer to store the created cache
356  *
357  * Allocates a new qdisc cache and fills it with a list of all configured
358  * qdiscs on all network devices. Release the cache with nl_cache_free().
359  *
360  * @return 0 on success or a negative error code.
361  */
362 int rtnl_qdisc_alloc_cache(struct nl_sock *sk, struct nl_cache **result)
363 {
364  return nl_cache_alloc_and_fill(&rtnl_qdisc_ops, sk, result);
365 }
366 
367 /**
368  * Search qdisc by interface index and parent
369  * @arg cache Qdisc cache
370  * @arg ifindex Interface index
371  * @arg parent Handle of parent qdisc
372  *
373  * Searches a qdisc cache previously allocated with rtnl_qdisc_alloc_cache()
374  * and searches for a qdisc matching the interface index and parent qdisc.
375  *
376  * The reference counter is incremented before returning the qdisc, therefore
377  * the reference must be given back with rtnl_qdisc_put() after usage.
378  *
379  * @return pointer to qdisc inside the cache or NULL if no match was found.
380  */
381 struct rtnl_qdisc *rtnl_qdisc_get_by_parent(struct nl_cache *cache,
382  int ifindex, uint32_t parent)
383 {
384  struct rtnl_qdisc *q;
385 
386  if (cache->c_ops != &rtnl_qdisc_ops)
387  return NULL;
388 
389  nl_list_for_each_entry(q, &cache->c_items, ce_list) {
390  if (q->q_parent == parent && q->q_ifindex == ifindex) {
391  nl_object_get((struct nl_object *) q);
392  return q;
393  }
394  }
395 
396  return NULL;
397 }
398 
399 /**
400  * Search qdisc by kind
401  * @arg cache Qdisc cache
402  * @arg ifindex Interface index
403  * @arg kind Qdisc kind (tbf, htb, cbq, etc)
404  *
405  * Searches a qdisc cache previously allocated with rtnl_qdisc_alloc_cache()
406  * and searches for a qdisc matching the interface index and kind.
407  *
408  * The reference counter is incremented before returning the qdisc, therefore
409  * the reference must be given back with rtnl_qdisc_put() after usage.
410  *
411  * @return pointer to qdisc inside the cache or NULL if no match was found.
412  */
413 struct rtnl_qdisc *rtnl_qdisc_get_by_kind(struct nl_cache *cache,
414  int ifindex, char *kind)
415 {
416  struct rtnl_qdisc *q;
417 
418  if (cache->c_ops != &rtnl_qdisc_ops)
419  return NULL;
420 
421  nl_list_for_each_entry(q, &cache->c_items, ce_list) {
422  if ((q->q_ifindex == ifindex) && (!strcmp(q->q_kind, kind))) {
423  nl_object_get((struct nl_object *) q);
424  return q;
425  }
426  }
427 
428  return NULL;
429 }
430 
431 /**
432  * Search qdisc by interface index and handle
433  * @arg cache Qdisc cache
434  * @arg ifindex Interface index
435  * @arg handle Handle
436  *
437  * Searches a qdisc cache previously allocated with rtnl_qdisc_alloc_cache()
438  * and searches for a qdisc matching the interface index and handle.
439  *
440  * The reference counter is incremented before returning the qdisc, therefore
441  * the reference must be given back with rtnl_qdisc_put() after usage.
442  *
443  * @return Qdisc or NULL if no match was found.
444  */
445 struct rtnl_qdisc *rtnl_qdisc_get(struct nl_cache *cache, int ifindex,
446  uint32_t handle)
447 {
448  struct rtnl_qdisc *q;
449 
450  if (cache->c_ops != &rtnl_qdisc_ops)
451  return NULL;
452 
453  nl_list_for_each_entry(q, &cache->c_items, ce_list) {
454  if (q->q_handle == handle && q->q_ifindex == ifindex) {
455  nl_object_get((struct nl_object *) q);
456  return q;
457  }
458  }
459 
460  return NULL;
461 }
462 
463 /** @} */
464 
465 /**
466  * @name Deprecated Functions
467  * @{
468  */
469 
470 /**
471  * Call a callback for each child class of a qdisc (deprecated)
472  *
473  * @deprecated Use of this function is deprecated, it does not allow
474  * to handle the out of memory situation that can occur.
475  */
476 void rtnl_qdisc_foreach_child(struct rtnl_qdisc *qdisc, struct nl_cache *cache,
477  void (*cb)(struct nl_object *, void *), void *arg)
478 {
479  struct rtnl_class *filter;
480 
481  filter = rtnl_class_alloc();
482  if (!filter)
483  return;
484 
485  rtnl_tc_set_parent(TC_CAST(filter), qdisc->q_handle);
486  rtnl_tc_set_ifindex(TC_CAST(filter), qdisc->q_ifindex);
487  rtnl_tc_set_kind(TC_CAST(filter), qdisc->q_kind);
488 
489  nl_cache_foreach_filter(cache, OBJ_CAST(filter), cb, arg);
490 
491  rtnl_class_put(filter);
492 }
493 
494 /**
495  * Call a callback for each filter attached to the qdisc (deprecated)
496  *
497  * @deprecated Use of this function is deprecated, it does not allow
498  * to handle the out of memory situation that can occur.
499  */
500 void rtnl_qdisc_foreach_cls(struct rtnl_qdisc *qdisc, struct nl_cache *cache,
501  void (*cb)(struct nl_object *, void *), void *arg)
502 {
503  struct rtnl_cls *filter;
504 
505  if (!(filter = rtnl_cls_alloc()))
506  return;
507 
508  rtnl_tc_set_ifindex(TC_CAST(filter), qdisc->q_ifindex);
509  rtnl_tc_set_parent(TC_CAST(filter), qdisc->q_parent);
510 
511  nl_cache_foreach_filter(cache, OBJ_CAST(filter), cb, arg);
512  rtnl_cls_put(filter);
513 }
514 
515 /**
516  * Build a netlink message requesting the update of a qdisc
517  *
518  * @deprecated Use of this function is deprecated in favour of
519  * rtnl_qdisc_build_update_request() due to the missing
520  * possibility of specifying additional flags.
521  */
522 int rtnl_qdisc_build_change_request(struct rtnl_qdisc *qdisc,
523  struct rtnl_qdisc *new,
524  struct nl_msg **result)
525 {
526  return rtnl_qdisc_build_update_request(qdisc, new, NLM_F_REPLACE,
527  result);
528 }
529 
530 /**
531  * Change attributes of a qdisc
532  *
533  * @deprecated Use of this function is deprecated in favour of
534  * rtnl_qdisc_update() due to the missing possibility of
535  * specifying additional flags.
536  */
537 int rtnl_qdisc_change(struct nl_sock *sk, struct rtnl_qdisc *qdisc,
538  struct rtnl_qdisc *new)
539 {
540  return rtnl_qdisc_update(sk, qdisc, new, NLM_F_REPLACE);
541 }
542 
543 /** @} */
544 
545 static void qdisc_dump_details(struct rtnl_tc *tc, struct nl_dump_params *p)
546 {
547  struct rtnl_qdisc *qdisc = (struct rtnl_qdisc *) tc;
548 
549  nl_dump(p, "refcnt %u", qdisc->q_info);
550 }
551 
552 static struct rtnl_tc_type_ops qdisc_ops = {
553  .tt_type = RTNL_TC_TYPE_QDISC,
554  .tt_dump_prefix = "qdisc",
555  .tt_dump = {
556  [NL_DUMP_DETAILS] = qdisc_dump_details,
557  },
558 };
559 
560 static struct nl_cache_ops rtnl_qdisc_ops = {
561  .co_name = "route/qdisc",
562  .co_hdrsize = sizeof(struct tcmsg),
563  .co_msgtypes = {
564  { RTM_NEWQDISC, NL_ACT_NEW, "new" },
565  { RTM_DELQDISC, NL_ACT_DEL, "del" },
566  { RTM_GETQDISC, NL_ACT_GET, "get" },
567  END_OF_MSGTYPES_LIST,
568  },
569  .co_protocol = NETLINK_ROUTE,
570  .co_groups = tc_groups,
571  .co_request_update = qdisc_request_update,
572  .co_msg_parser = qdisc_msg_parser,
573  .co_obj_ops = &qdisc_obj_ops,
574 };
575 
576 static struct nl_object_ops qdisc_obj_ops = {
577  .oo_name = "route/qdisc",
578  .oo_size = sizeof(struct rtnl_qdisc),
579  .oo_free_data = rtnl_tc_free_data,
580  .oo_clone = rtnl_tc_clone,
581  .oo_dump = {
582  [NL_DUMP_LINE] = rtnl_tc_dump_line,
583  [NL_DUMP_DETAILS] = rtnl_tc_dump_details,
584  [NL_DUMP_STATS] = rtnl_tc_dump_stats,
585  },
586  .oo_compare = rtnl_tc_compare,
587  .oo_id_attrs = (TCA_ATTR_IFINDEX | TCA_ATTR_HANDLE),
588 };
589 
590 static void __init qdisc_init(void)
591 {
592  rtnl_tc_type_register(&qdisc_ops);
593  nl_cache_mngt_register(&rtnl_qdisc_ops);
594 }
595 
596 static void __exit qdisc_exit(void)
597 {
598  nl_cache_mngt_unregister(&rtnl_qdisc_ops);
599  rtnl_tc_type_unregister(&qdisc_ops);
600 }
601 
602 /** @} */
#define NLA_PUT_STRING(msg, attrtype, value)
Add string attribute to netlink message.
Definition: attr.h:257
int nl_cache_mngt_unregister(struct nl_cache_ops *ops)
Unregister a set of cache operations.
Definition: cache_mngt.c:281
int nl_cache_mngt_register(struct nl_cache_ops *ops)
Register a set of cache operations.
Definition: cache_mngt.c:246
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:1294
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:228
struct nl_msg * nlmsg_alloc_simple(int nlmsgtype, int flags)
Allocate a new netlink message.
Definition: msg.c:341
void nlmsg_free(struct nl_msg *msg)
Release a reference from an netlink message.
Definition: msg.c:558
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:442
void nl_object_put(struct nl_object *obj)
Release a reference from an object.
Definition: object.c:214
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:48
void nl_object_get(struct nl_object *obj)
Acquire a reference on a object.
Definition: object.c:203
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:362
int rtnl_qdisc_delete(struct nl_sock *sk, struct rtnl_qdisc *qdisc)
Delete qdisc.
Definition: qdisc.c:334
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:522
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:267
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:445
struct rtnl_qdisc * rtnl_qdisc_get_by_kind(struct nl_cache *cache, int ifindex, char *kind)
Search qdisc by kind.
Definition: qdisc.c:413
int rtnl_qdisc_change(struct nl_sock *sk, struct rtnl_qdisc *qdisc, struct rtnl_qdisc *new)
Change attributes of a qdisc.
Definition: qdisc.c:537
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:500
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:381
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:108
int rtnl_qdisc_update(struct nl_sock *sk, struct rtnl_qdisc *qdisc, struct rtnl_qdisc *new, int flags)
Update qdisc.
Definition: qdisc.c:241
int rtnl_qdisc_add(struct nl_sock *sk, struct rtnl_qdisc *qdisc, int flags)
Add qdisc.
Definition: qdisc.c:156
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:476
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:182
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:542
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:574
int rtnl_tc_set_kind(struct rtnl_tc *tc, const char *kind)
Define the type of traffic control object.
Definition: tc.c:523
void rtnl_tc_set_ifindex(struct rtnl_tc *tc, int ifindex)
Set interface index of traffic control object.
Definition: tc.c:272
#define TC_CAST(ptr)
Macro to cast qdisc/class/classifier to tc object.
Definition: tc.h:50
void rtnl_tc_set_handle(struct rtnl_tc *tc, uint32_t id)
Set identifier of traffic control object.
Definition: tc.c:480
void rtnl_tc_set_parent(struct rtnl_tc *tc, uint32_t parent)
Set the parent identifier of a traffic control object.
Definition: tc.c:501
void nl_dump(struct nl_dump_params *params, const char *fmt,...)
Dump a formatted character string.
Definition: utils.c:955
@ NL_DUMP_STATS
Dump all attributes including statistics.
Definition: types.h:18
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:16
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:17
Dumping parameters.
Definition: types.h:28