bpftool
Tool for inspection and simple manipulation of eBPF programs and maps.
TLDR
List information about loaded eBPF programs
List eBPF program attachments in the kernel networking subsystem
List all active links
List all raw_tracepoint, tracepoint, kprobe attachments in the system
List BPF Type Format (BTF) data
List information about loaded maps
Probe a network device "eth0" for supported eBPF features
Run commands in batch mode from a file
SYNOPSIS
bpftool [OPTIONS] OBJECT { COMMAND | help }
bpftool batch file FILE
bpftool version
OBJECT := { map | program | cgroup | perf | net | feature }
OPTIONS := { { -V | --version } | { -h | --help } | { -j | --json } [{ -p | --pretty }] }
MAP-COMMANDS := { show | list | create | dump | update | lookup | getnext | delete | pin | event_pipe | help }
PROG-COMMANDS := { show | list | dump jited | dump xlated | pin | load | attach | detach | help }
CGROUP-COMMANDS := { show | list | attach | detach | help }
PERF-COMMANDS := { show | list | help }
NET-COMMANDS := { show | list | help }
FEATURE-COMMANDS := { probe | help }
DESCRIPTION
bpftool allows for inspection and simple modification of BPF objects on the system.
Note that format of the output of all tools is not guaranteed to be stable and should not be depended upon.
OPTIONS
- -h, --help
Print short help message (similar to bpftool help).
- -V, --version
Print version number (similar to bpftool version), and optional features that were included when bpftool was compiled. Optional features include linking against libbfd to provide the disassembler for JIT-ted programs (bpftool prog dump jited) and usage of BPF skeletons (some features like bpftool prog profile or showing pids associated to BPF objects may rely on it).
- -j, --json
Generate JSON output. For commands that cannot produce JSON, this option has no effect.
- -p, --pretty
Generate human-readable JSON output. Implies -j.
- -d, --debug
Print all logs available, even debug-level information. This includes logs from libbpf as well as from the verifier, when attempting to load programs.
- -m, --mapcompat
Allow loading maps with unknown map definitions.
- -n, --nomount
Do not automatically attempt to mount any virtual file system (such as tracefs or BPF virtual file system) when necessary.
SEE ALSO
bpf(2), bpf-helpers(7), bpftool-btf(8), bpftool-cgroup(8), bpftool-feature(8), bpftool-gen(8), bpftool-iter(8), bpftool-link(8), bpftool-map(8), bpftool-net(8), bpftool-perf(8), bpftool-prog(8), bpftool-struct_ops(8)
