Struct aya::maps::hash_map::HashMap

source · [−]

pub struct HashMap<T: Deref<Target = Map>, K, V> { /* private fields */ }

Expand description

A hash map that can be shared between eBPF programs and user space.

Minimum kernel version

The minimum kernel version required to use this feature is 3.19.

Examples

use aya::maps::HashMap;
use std::convert::TryFrom;

let mut redirect_ports = HashMap::try_from(bpf.map_mut("REDIRECT_PORTS")?)?;

// redirect port 80 to 8080
redirect_ports.insert(80, 8080, 0);
// redirect port 443 to 8443
redirect_ports.insert(443, 8443, 0);

Implementations

impl<T: Deref<Target = Map>, K: Pod, V: Pod> HashMap<T, K, V>

pub fn get(&self, key: &K, flags: u64) -> Result<V, MapError>

Returns a copy of the value associated with the key.

pub fn iter(&self) -> MapIter<'_, K, V, Self>ⓘNotable traits for MapIter<'_, K, V, I>`impl<K: Pod, V, I: IterableMap<K, V>> Iterator for MapIter<'_, K, V, I> type Item = Result<(K, V), MapError>;`

An iterator visiting all key-value pairs in arbitrary order. The iterator item type is Result<(K, V), MapError>.

pub fn keys(&self) -> MapKeys<'_, K>ⓘNotable traits for MapKeys<'_, K>`impl<K: Pod> Iterator for MapKeys<'_, K> type Item = Result<K, MapError>;`

An iterator visiting all keys in arbitrary order. The iterator element type is Result<K, MapError>.

impl<T: DerefMut<Target = Map>, K: Pod, V: Pod> HashMap<T, K, V>

pub fn insert(&mut self, key: K, value: V, flags: u64) -> Result<(), MapError>

Inserts a key-value pair into the map.

pub fn remove(&mut self, key: &K) -> Result<(), MapError>

Removes a key from the map.

Trait Implementations

impl<T: Deref<Target = Map>, K: Pod, V: Pod> IterableMap<K, V> for HashMap<T, K, V>

fn map(&self) -> &Map

Get a generic map handle

fn get(&self, key: &K) -> Result<V, MapError>

Get the value for the provided key

impl<'a, K: Pod, V: Pod> TryFrom<&'a Map> for HashMap<&'a Map, K, V>

type Error = MapError

The type returned in the event of a conversion error.

fn try_from(a: &'a Map) -> Result<HashMap<&'a Map, K, V>, MapError>

Performs the conversion.

impl<'a, K: Pod, V: Pod> TryFrom<&'a mut Map> for HashMap<&'a mut Map, K, V>

type Error = MapError

The type returned in the event of a conversion error.

fn try_from(a: &'a mut Map) -> Result<HashMap<&'a mut Map, K, V>, MapError>

Performs the conversion.

impl<K: Pod, V: Pod> TryFrom<MapRef> for HashMap<MapRef, K, V>

type Error = MapError

The type returned in the event of a conversion error.

fn try_from(a: MapRef) -> Result<HashMap<MapRef, K, V>, MapError>

Performs the conversion.

impl<K: Pod, V: Pod> TryFrom<MapRefMut> for HashMap<MapRefMut, K, V>

type Error = MapError

The type returned in the event of a conversion error.

fn try_from(a: MapRefMut) -> Result<HashMap<MapRefMut, K, V>, MapError>

Performs the conversion.

Auto Trait Implementations

impl<T, K, V> RefUnwindSafe for HashMap<T, K, V> where
    K: RefUnwindSafe,
    T: RefUnwindSafe,
    V: RefUnwindSafe,

impl<T, K, V> Send for HashMap<T, K, V> where
    K: Send,
    T: Send,
    V: Send,

impl<T, K, V> Sync for HashMap<T, K, V> where
    K: Sync,
    T: Sync,
    V: Sync,

impl<T, K, V> Unpin for HashMap<T, K, V> where
    K: Unpin,
    T: Unpin,
    V: Unpin,

impl<T, K, V> UnwindSafe for HashMap<T, K, V> where
    K: UnwindSafe,
    T: UnwindSafe,
    V: UnwindSafe,

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.