Struct Map

pub struct Map {
    pub name: String,
    pub kind: u32,
    /* private fields */
}

A base BPF map data structure

It is a base data structure that contains a map definition and auxiliary data. It just hods data but it does not provide any useful API to users. See HashMap, LruHashMap, PerCpuHashMap, LruPerCpuHashMap, Array, PerCpuArray that wrap Map to provide API of BPF maps to userspace programs.

Fields

name: String

kind: u32

Implementations

impl Map

pub fn load(name: &str, code: &[u8]) -> Result<Map>

pub fn from_pin_file(file: impl AsRef<Path>) -> Result<Map>

Create Map from a file which represents pinned map

Example

use redbpf::{Array, Map};
let map = Map::from_pin_file("/sys/fs/bpf/persist_map").expect("error on creating map from file");
let array = Array::<u64>::new(&map).expect("error on creating array");

pub fn pin(&mut self, file: impl AsRef<Path>) -> Result<()>

Pin map to BPF FS

Example

use redbpf::Module;
use redbpf::load::Loader;
let mut loaded = Loader::load_file("file.elf").expect("error loading probe");
loaded.map_mut("persist_map").expect("map not found").pin("/sys/fs/bpf/persist_map").expect("error on pinning");

pub fn unpin(&mut self) -> Result<()>

Unpin map

Example

use redbpf::Module;
use redbpf::load::Loader;
let mut loaded = Loader::load_file("file.elf").expect("error loading probe");
let persist_map = loaded.map_mut("persist_map").expect("map not found");
persist_map.pin("/sys/fs/bpf/persist_map").expect("error on pinning");
// do some stuff...
persist_map.unpin().expect("error on unpinning");

Trait Implementations

impl Debug for Map

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for Map

fn drop(&mut self)

Executes the destructor for this type.