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struct nl_cache* rtnl_cls_alloc_cache ( struct nl_handle *  handle,
int  ifindex,
uint32_t  parent 
) [read]

Build a classifier cache including all classifiers attached to the specified class/qdisc on eht specified interface.

  • handle netlink handle
  • ifindex interface index of the link the classes are attached to.
  • parent parent qdisc/class
Allocates a new cache, initializes it properly and updates it to include all classes attached to the specified interface.

The caller is responsible for destroying and freeing the cache after using it. (nl_cache_destroy_and_free())
The cache or NULL if an error has occured.

Definition at line 474 of file classifier.c.

References nl_cache_alloc_from_ops(), nl_cache_destroy_and_free(), and nl_cache_update().

      struct nl_cache * cache;
      cache = nl_cache_alloc_from_ops(&rtnl_cls_ops);
      if (cache == NULL)
            return NULL;

      cache->c_iarg1 = ifindex;
      cache->c_iarg2 = parent;
      if (nl_cache_update(handle, cache) < 0) {
            return NULL;

      return cache;

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