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History

Billy McFall eef7346fb2 test: adjust test byte arrays for big endian Adding support for s390x (big endian architecture) and found that some of the unit tests have structures and files implemented as byte arrays. They are all coded as little endian and need a bug endian version to work properly. Signed-off-by: Billy McFall <22157057+Billy99@users.noreply.github.com>		4 weeks ago
..
src	test: adjust test byte arrays for big endian	4 weeks ago
CHANGELOG.md	chore(aya-ebpf): Rename bpf -> ebpf	7 months ago
Cargo.toml	Release aya-log-common v0.1.14, aya-log v0.2.0	7 months ago
README.md	feat(aya-log): Rename BpfLogger to EbpfLogger	7 months ago
release.toml	Re-organize into a single workspace	2 years ago

README.md

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::EbpfLogger;

env_logger::init();

// Will log using the default logger, which is TermLogger in this case
EbpfLogger::init(&mut bpf).unwrap();

eBPF code

use aya_log_ebpf::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)
}