NAME

       bpftool-struct_ops - tool to register/unregister/introspect BPF struct_ops

SYNOPSIS

          bpftool [OPTIONS] struct_ops COMMAND

          OPTIONS := { { -j | --json } [{ -p | --pretty }] | { -d | --debug } | { -l | --legacy }
          }

          COMMANDS := { show | list | dump | register | unregister | help }

STRUCT_OPS COMMANDS

       bpftool struct_ops { show | list } [STRUCT_OPS_MAP]
       bpftool struct_ops dump [STRUCT_OPS_MAP]
       bpftool struct_ops register OBJ
       bpftool struct_ops unregister STRUCT_OPS_MAP
       bpftool struct_ops help

       STRUCT_OPS_MAP := { id STRUCT_OPS_MAP_ID | name STRUCT_OPS_MAP_NAME }
       OBJ := /a/file/of/bpf_struct_ops.o

DESCRIPTION

          bpftool struct_ops { show | list } [STRUCT_OPS_MAP]
                 Show brief information about the struct_ops in the system.  If STRUCT_OPS_MAP is
                 specified,  it  shows  information only for the given struct_ops.  Otherwise, it
                 lists all struct_ops currently existing in the system.

                 Output will start with struct_ops map ID, followed  by  its  map  name  and  its
                 struct_ops's kernel type.

          bpftool struct_ops dump [STRUCT_OPS_MAP]
                 Dump  details information about the struct_ops in the system.  If STRUCT_OPS_MAP
                 is specified, it dumps information only for the given struct_ops.  Otherwise, it
                 dumps all struct_ops currently existing in the system.

          bpftool struct_ops register OBJ
                 Register  bpf  struct_ops  from  OBJ.   All  struct_ops  under  the  ELF section
                 ".struct_ops" will be registered to its kernel subsystem.

          bpftool struct_ops unregister STRUCT_OPS_MAP
                 Unregister the STRUCT_OPS_MAP from the kernel subsystem.

          bpftool struct_ops help
                 Print short help message.

OPTIONS

          -h, --help
                 Print short help message (similar to bpftool help).

          -V, --version
                 Print bpftool's version number (similar to bpftool version), the number  of  the
                 libbpf version in use, 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.

          -l, --legacy
                 Use  legacy  libbpf  mode  which  has  more relaxed BPF program requirements. By
                 default, bpftool has more  strict  requirements  about  section  names,  changes
                 pinning logic and doesn't support some of the older non-BTF map declarations.

                 See https://github.com/libbpf/libbpf/wiki/Libbpf:-the-road-to-v1.0 for details.

EXAMPLES

       # bpftool struct_ops show

          100: dctcp           tcp_congestion_ops
          105: cubic           tcp_congestion_ops

       # bpftool struct_ops unregister id 105

          Unregistered tcp_congestion_ops cubic id 105

       # bpftool struct_ops register bpf_cubic.o

          Registered tcp_congestion_ops cubic id 110

SEE ALSO

          bpf(2),      bpf-helpers(7),     bpftool(8),     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)