Libbpf userspace function bpf_map_get_fd_by_id
Low level wrapper around the BPF_MAP_GET_FD_BY_ID syscall command.
Definition
int bpf_map_get_fd_by_id(__u32 id);
Parameters
id: BPF map ID
Return
File descriptor of the BPF map with the given id, on success; negative error code, otherwise
Usage
This function returns the file descriptor of the BPF map with the given id. This causes the current process to hold a reference to the map, preventing the kernel from unloading it. The file descriptor should be closed with close when it is no longer needed.
Example
Docs could be improved
This part of the docs is incomplete, contributions are very welcome