Struct redbpf::ProgramArray

pub struct ProgramArray<'a> { /* fields omitted */ }

Program array map.

An array of eBPF programs that can be used as a jump table.

To use this from eBPF code, see redbpf_probes::maps::ProgramArray.

Implementations

impl<'base> ProgramArray<'base>

pub fn new(base: &Map) -> Result<ProgramArray<'_>>

pub fn get(&self, index: u32) -> Result<RawFd>

Get the fd of the eBPF program at index.

pub fn set(&mut self, index: u32, fd: RawFd) -> Result<()>

Set the index entry to the given eBPF program fd.

To jump to a program from eBPF, see redbpf_probes::maps::ProgramArray::tail_call.

Example

pub const PROGRAM_PARSE_HTTP: u32 = 0;

use redbpf::{load::Loader, ProgramArray};
let mut loader = Loader::load_file("iotop.elf").expect("error loading probe");
let mut programs = ProgramArray::new(loader.map("program_map").unwrap()).unwrap();

programs.set(
    PROGRAM_PARSE_HTTP,
    loader.program("parse_http").unwrap().fd().unwrap(),
);