Struct MapFdInfo 

pub struct MapFdInfo {
    pub map_type: MapType,
    pub key_size: u32,
    pub value_size: u32,
    pub max_entries: u32,
    pub map_flags: Option<u32>,
    pub map_extra: Option<u64>,
    pub memlock: Option<u64>,
    pub map_id: Option<u32>,
    pub frozen: Option<bool>,
    pub owner_prog_type: Option<ProgramType>,
    pub owner_jited: Option<bool>,
}

Information about a BPF map obtained from /proc/self/fdinfo.

This provides information not available through MapInfo, such as memlock (memory usage) and frozen status.

The fields correspond to those printed by bpf_map_show_fdinfo in the kernel source. See also bpftool’s get_fdinfo for the matching userspace parsing logic.

Fields

map_type: MapType

The map type.

key_size: u32

The size of the map’s keys in bytes.

value_size: u32

The size of the map’s values in bytes.

max_entries: u32

The maximum number of entries in the map.

map_flags: Option<u32>

The map flags.

map_extra: Option<u64>

Extra map-specific data.

memlock: Option<u64>

The amount of memory locked by the map in bytes.

map_id: Option<u32>

The map’s ID.

frozen: Option<bool>

Whether the map is frozen.

owner_prog_type: Option<ProgramType>

The type of the owner program (only for prog_array maps).

owner_jited: Option<bool>

Whether the owner program is JIT-compiled (only for prog_array maps).

Implementations

impl MapFdInfo

pub fn from_fd(fd: BorrowedFd<'_>) -> Result<Self>

Create a MapFdInfo by reading /proc/self/fdinfo for the given fd.

Trait Implementations

impl Clone for MapFdInfo

fn clone(&self) -> MapFdInfo

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MapFdInfo

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

Formats the value using the given formatter.