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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,100 +1,117 @@ | ||
| use anyhow::{bail, Result}; | ||
| use clap::{Arg, SubCommand}; | ||
| use std::os::unix::io::AsRawFd; | ||
| use std::path::Path; | ||
| use anyhow::Result; | ||
|
|
||
| use nix::fcntl::OFlag; | ||
| use nix::sys::stat::Mode; | ||
| #[cfg(feature = "cgroupsv2_devices")] | ||
| mod bpf { | ||
| use anyhow::{bail, Result}; | ||
| use clap::Arg; | ||
| use clap::Command; | ||
| use oci_spec::runtime::LinuxDeviceCgroup; | ||
| use std::os::unix::io::AsRawFd; | ||
| use std::path::Path; | ||
|
|
||
| use cgroups::v2::devices::bpf; | ||
| use cgroups::v2::devices::emulator; | ||
| use cgroups::v2::devices::program; | ||
| use oci_spec::*; | ||
| use nix::fcntl::OFlag; | ||
| use nix::sys::stat::Mode; | ||
|
|
||
| const LICENSE: &'static str = &"Apache"; | ||
| use libcgroups::v2::devices::bpf; | ||
| use libcgroups::v2::devices::emulator; | ||
| use libcgroups::v2::devices::program; | ||
|
|
||
| fn main() -> Result<()> { | ||
| env_logger::init(); | ||
| const LICENSE: &str = "Apache"; | ||
| fn cli() -> Command { | ||
| clap::Command::new("bpf") | ||
| .version("0.1") | ||
| .about("tools to test BPF program for cgroups v2 devices") | ||
| .arg(Arg::new("cgroup_dir").short('c').value_name("CGROUP_DIR")) | ||
| .subcommand( | ||
| Command::new("query").about("query list of BPF programs attached to cgroup dir"), | ||
| ) | ||
| .subcommand( | ||
| Command::new("detach") | ||
| .about("detach BPF program by id") | ||
| .arg( | ||
| Arg::new("id") | ||
| .value_name("PROG_ID") | ||
| .required(true) | ||
| .help("ID of BPF program returned by query command"), | ||
| ), | ||
| ) | ||
| .subcommand( | ||
| Command::new("attach") | ||
| .about("compile rules to BPF and attach to cgroup dir") | ||
| .arg( | ||
| Arg::new("input_file") | ||
| .value_name("INPUT_FILE") | ||
| .required(true) | ||
| .help("File contains Vec<LinuxDeviceCgroup> in json format"), | ||
| ), | ||
| ) | ||
| } | ||
|
|
||
| let matches = clap::App::new("bpf") | ||
| .version("0.1") | ||
| .about("tools to test BPF program for cgroups v2 devices") | ||
| .arg( | ||
| Arg::with_name("cgroup_dir") | ||
| .short("c") | ||
| .value_name("CGROUP_DIR"), | ||
| ) | ||
| .subcommand( | ||
| SubCommand::with_name("query") | ||
| .help("query list of BPF programs attached to cgroup dir"), | ||
| ) | ||
| .subcommand( | ||
| SubCommand::with_name("detach") | ||
| .help("detach BPF program by id") | ||
| .arg( | ||
| Arg::with_name("id") | ||
| .value_name("PROG_ID") | ||
| .required(true) | ||
| .help("ID of BPF program returned by query command"), | ||
| ), | ||
| ) | ||
| .subcommand( | ||
| SubCommand::with_name("attach") | ||
| .help("compile rules to BPF and attach to cgroup dir") | ||
| .arg( | ||
| Arg::with_name("input_file") | ||
| .value_name("INPUT_FILE") | ||
| .required(true) | ||
| .help("File contains Vec<LinuxDeviceCgroup> in json format"), | ||
| ), | ||
| ) | ||
| .get_matches_safe()?; | ||
| fn parse_cgroupv1_device_rules<P: AsRef<Path>>(path: P) -> Result<Vec<LinuxDeviceCgroup>> { | ||
| let content = std::fs::read_to_string(path)?; | ||
| let devices = serde_json::from_str(&content)?; | ||
| Ok(devices) | ||
| } | ||
|
|
||
| let cgroup_dir = matches.value_of("cgroup_dir").unwrap(); | ||
|
|
||
| let cgroup_fd = nix::dir::Dir::open( | ||
| cgroup_dir, | ||
| OFlag::O_RDONLY | OFlag::O_DIRECTORY, | ||
| Mode::from_bits(0o600).unwrap(), | ||
| )?; | ||
| pub fn run() -> Result<()> { | ||
| let matches = cli().get_matches(); | ||
| let cgroup_dir = matches.get_one::<String>("cgroup_dir").unwrap(); | ||
| let cgroup_fd = nix::dir::Dir::open( | ||
| cgroup_dir.as_str(), | ||
| OFlag::O_RDONLY | OFlag::O_DIRECTORY, | ||
| Mode::from_bits(0o600).unwrap(), | ||
| )?; | ||
| match matches.subcommand() { | ||
| Some(("query", _)) => { | ||
| let progs = bpf::prog::query(cgroup_fd.as_raw_fd())?; | ||
| for prog in &progs { | ||
| println!("prog: id={}, fd={}", prog.id, prog.fd); | ||
| } | ||
| } | ||
| Some(("detach", submatch)) => { | ||
| let prog_id = submatch.get_one::<String>("id").unwrap().parse::<u32>()?; | ||
| let progs = bpf::prog::query(cgroup_fd.as_raw_fd())?; | ||
| let prog = progs.iter().find(|v| v.id == prog_id); | ||
| if prog.is_none() { | ||
| bail!("can't get prog fd by prog id"); | ||
| } | ||
|
|
||
| match matches.subcommand() { | ||
| ("query", Some(_)) => { | ||
| let progs = bpf::prog_query(cgroup_fd.as_raw_fd())?; | ||
| for prog in &progs { | ||
| println!("prog: id={}, fd={}", prog.id, prog.fd); | ||
| bpf::prog::detach2(prog.unwrap().fd, cgroup_fd.as_raw_fd())?; | ||
| println!("detach ok"); | ||
| } | ||
| } | ||
| ("detach", Some(submatch)) => { | ||
| let prog_id = submatch.value_of("id").unwrap().parse::<u32>()?; | ||
| let progs = bpf::prog_query(cgroup_fd.as_raw_fd())?; | ||
| let prog = progs.iter().find(|v| v.id == prog_id); | ||
| if prog.is_none() { | ||
| bail!("can't get prog fd by prog id"); | ||
| Some(("attach", submatch)) => { | ||
| let input_file = submatch.get_one::<String>("input_file").unwrap(); | ||
| let rules = parse_cgroupv1_device_rules(input_file)?; | ||
| let mut emulator = emulator::Emulator::with_default_allow(false); | ||
| emulator.add_rules(&rules); | ||
| let prog = program::Program::from_rules(&emulator.rules, emulator.default_allow)?; | ||
| let prog_fd = bpf::prog::load(LICENSE, prog.bytecodes())?; | ||
| bpf::prog::attach(prog_fd, cgroup_fd.as_raw_fd())?; | ||
| println!("attach ok"); | ||
| } | ||
|
|
||
| bpf::prog_detach2(prog.unwrap().fd, cgroup_fd.as_raw_fd())?; | ||
| println!("detach ok"); | ||
| } | ||
| ("attach", Some(submatch)) => { | ||
| let input_file = submatch.value_of("input_file").unwrap(); | ||
| let rules = parse_cgroupv1_device_rules(&input_file)?; | ||
| let mut emulator = emulator::Emulator::with_default_allow(false); | ||
| emulator.add_rules(&rules)?; | ||
| let prog = program::Program::from_rules(&emulator.rules, emulator.default_allow)?; | ||
| let prog_fd = bpf::prog_load(LICENSE, prog.bytecodes())?; | ||
| bpf::prog_attach(prog_fd, cgroup_fd.as_raw_fd())?; | ||
| println!("attach ok"); | ||
| } | ||
| _ => unreachable!(), | ||
| }; | ||
| Ok(()) | ||
| } | ||
| } | ||
|
|
||
| (_, _) => {} | ||
| }; | ||
| #[cfg(not(feature = "cgroupsv2_devices"))] | ||
| mod bpf { | ||
| use anyhow::{bail, Result}; | ||
|
|
||
| Ok(()) | ||
| pub fn run() -> Result<()> { | ||
| if !cfg!(feature = "cgroupsv2_devices") { | ||
| bail!("cgroupsv2_devices feature is not enabled"); | ||
| } | ||
|
|
||
| unreachable!() | ||
| } | ||
| } | ||
|
|
||
| fn parse_cgroupv1_device_rules<P: AsRef<Path>>(path: P) -> Result<Vec<LinuxDeviceCgroup>> { | ||
| let content = std::fs::read_to_string(path)?; | ||
| let devices = serde_json::from_str(&content)?; | ||
| Ok(devices) | ||
| fn main() -> Result<()> { | ||
| env_logger::init(); | ||
| bpf::run()?; | ||
|
|
||
| Ok(()) | ||
| } |