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34 lines
1016 B
Rust
34 lines
1016 B
Rust
mod cpu_map;
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mod dev_map;
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mod dev_map_hash;
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mod xsk_map;
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use core::cell::UnsafeCell;
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use aya_bpf_bindings::{
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bindings::{bpf_map_def, xdp_action::XDP_REDIRECT},
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helpers::bpf_redirect_map,
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};
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pub use cpu_map::CpuMap;
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pub use dev_map::DevMap;
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pub use dev_map_hash::DevMapHash;
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pub use xsk_map::XskMap;
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/// Wrapper aroung the `bpf_redirect_map` function.
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///
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/// # Return value
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///
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/// - `Ok(XDP_REDIRECT)` on success.
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/// - `Err(_)` of the lowest two bits of `flags` on failure.
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#[inline(always)]
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fn try_redirect_map(def: &UnsafeCell<bpf_map_def>, key: u32, flags: u64) -> Result<u32, u32> {
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// Return XDP_REDIRECT on success, or the value of the two lower bits of the flags argument on
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// error. Thus I have no idea why it returns a long (i64) instead of something saner, hence the
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// unsigned_abs.
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let ret = unsafe { bpf_redirect_map(def.get() as *mut _, key.into(), flags) };
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match ret.unsigned_abs() as u32 {
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XDP_REDIRECT => Ok(XDP_REDIRECT),
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ret => Err(ret),
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}
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}
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