mirror of https://github.com/aya-rs/aya
55 lines
1.6 KiB
Rust
55 lines
1.6 KiB
Rust
use core::{cell::UnsafeCell, mem};
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use crate::{
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bindings::{bpf_map_def, bpf_map_type::BPF_MAP_TYPE_CPUMAP},
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helpers::bpf_redirect_map,
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maps::PinningType,
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};
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#[repr(transparent)]
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pub struct CpuMap {
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def: UnsafeCell<bpf_map_def>,
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}
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unsafe impl Sync for CpuMap {}
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impl CpuMap {
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pub const fn with_max_entries(max_entries: u32, flags: u32) -> CpuMap {
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CpuMap {
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def: UnsafeCell::new(bpf_map_def {
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type_: BPF_MAP_TYPE_CPUMAP,
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key_size: mem::size_of::<u32>() as u32,
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value_size: mem::size_of::<u32>() as u32,
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max_entries,
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map_flags: flags,
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id: 0,
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pinning: PinningType::None as u32,
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}),
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}
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}
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pub const fn pinned(max_entries: u32, flags: u32) -> CpuMap {
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CpuMap {
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def: UnsafeCell::new(bpf_map_def {
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type_: BPF_MAP_TYPE_CPUMAP,
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key_size: mem::size_of::<u32>() as u32,
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value_size: mem::size_of::<u32>() as u32,
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max_entries,
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map_flags: flags,
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id: 0,
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pinning: PinningType::ByName as u32,
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}),
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}
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}
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#[inline(always)]
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pub fn redirect(&self, index: u32, flags: u64) -> u32 {
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unsafe {
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// Return XDP_REDIRECT on success, or the value of the two lower bits of the flags
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// argument on error. Thus I have no idea why it returns a long (i64) instead of
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// something saner, hence the unsigned_abs.
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bpf_redirect_map(self.def.get() as *mut _, index.into(), flags).unsigned_abs() as u32
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}
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}
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}
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