выполнить команду на расширенной карте или программе BPF (perform a command on an extended BPF map or program)
Возвращаемое значение (Return value)
For a successful call, the return value depends on the operation:
BPF_MAP_CREATE
The new file descriptor associated with the eBPF map.
BPF_PROG_LOAD
The new file descriptor associated with the eBPF program.
All other commands
Zero.
On error, -1 is returned, and errno is set to indicate the error.
