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Libbpf userspace function bpf_map_get_next_key

0.0.1

Low level wrapper around the BPF_MAP_GET_NEXT_KEY syscall command.

Definition

int bpf_map_get_next_key(int fd, const void *key, void *next_key);

Parameters

  • fd: file descriptor of the map to get the next key from
  • key: pointer to memory containing bytes of the key used for lookup
  • next_key: pointer to memory in which the next key will be stored

Return

0, on success; negative error, otherwise

Usage

This function should only be used if you need precise control over the map element lookup process. In most cases the bpf_map__get_next_key function should be used instead.

Example

Docs could be improved

This part of the docs is incomplete, contributions are very welcome