aya_ebpf/maps/perf/
perf_event_byte_array.rs

1use core::{cell::UnsafeCell, mem};
2
3use crate::{
4    bindings::{bpf_map_def, bpf_map_type::BPF_MAP_TYPE_PERF_EVENT_ARRAY, BPF_F_CURRENT_CPU},
5    helpers::bpf_perf_event_output,
6    maps::PinningType,
7    EbpfContext,
8};
9
10#[repr(transparent)]
11pub struct PerfEventByteArray {
12    def: UnsafeCell<bpf_map_def>,
13}
14
15unsafe impl Sync for PerfEventByteArray {}
16
17impl PerfEventByteArray {
18    pub const fn new(flags: u32) -> PerfEventByteArray {
19        PerfEventByteArray {
20            def: UnsafeCell::new(bpf_map_def {
21                type_: BPF_MAP_TYPE_PERF_EVENT_ARRAY,
22                key_size: mem::size_of::<u32>() as u32,
23                value_size: mem::size_of::<u32>() as u32,
24                max_entries: 0,
25                map_flags: flags,
26                id: 0,
27                pinning: PinningType::None as u32,
28            }),
29        }
30    }
31
32    pub const fn pinned(flags: u32) -> PerfEventByteArray {
33        PerfEventByteArray {
34            def: UnsafeCell::new(bpf_map_def {
35                type_: BPF_MAP_TYPE_PERF_EVENT_ARRAY,
36                key_size: mem::size_of::<u32>() as u32,
37                value_size: mem::size_of::<u32>() as u32,
38                max_entries: 0,
39                map_flags: flags,
40                id: 0,
41                pinning: PinningType::ByName as u32,
42            }),
43        }
44    }
45
46    pub fn output<C: EbpfContext>(&self, ctx: &C, data: &[u8], flags: u32) {
47        self.output_at_index(ctx, BPF_F_CURRENT_CPU as u32, data, flags)
48    }
49
50    pub fn output_at_index<C: EbpfContext>(&self, ctx: &C, index: u32, data: &[u8], flags: u32) {
51        let flags = u64::from(flags) << 32 | u64::from(index);
52        unsafe {
53            bpf_perf_event_output(
54                ctx.as_ptr(),
55                self.def.get() as *mut _,
56                flags,
57                data.as_ptr() as *mut _,
58                data.len() as u64,
59            );
60        }
61    }
62}
aya_ebpf/maps/perf/perf_event_byte_array.rs

aya_ebpf/maps/perf/
perf_event_byte_array.rs
