1 unstable release
0.2.0 | Mar 1, 2024 |
---|
#84 in #bpf
570KB
12K
SLoC
aya-log - a logging library for eBPF programs
Overview
aya-log
is a logging library for eBPF programs written using aya. Think of
it as the log crate for eBPF.
Installation
User space
Add aya-log
to Cargo.toml
:
[dependencies]
aya-log = { git = "https://github.com/aya-rs/aya", branch = "main" }
eBPF side
Add aya-log-ebpf
to Cargo.toml
:
[dependencies]
aya-log-ebpf = { git = "https://github.com/aya-rs/aya", branch = "main" }
Example
Here's an example that uses aya-log
in conjunction with the env_logger crate
to log eBPF messages to the terminal.
User space code
use aya_log::BpfLogger;
env_logger::init();
// Will log using the default logger, which is TermLogger in this case
BpfLogger::init(&mut bpf).unwrap();
eBPF code
use aya_log_ebpf_nightly::info;
fn try_xdp_firewall(ctx: XdpContext) -> Result<u32, ()> {
if let Some(port) = tcp_dest_port(&ctx)? {
if block_port(port) {
info!(&ctx, "❌ blocked incoming connection on port: {}", port);
return Ok(XDP_DROP);
}
}
Ok(XDP_PASS)
}
Dependencies
~7–15MB
~187K SLoC