bpftool-cgroup - tool for inspection and simple manipulation of eBPF progs

bpftoolcgroup { show | list } CGROUP [effective]
       bpftoolcgrouptree [CGROUP_ROOT] [effective]
       bpftoolcgroupattachCGROUPATTACH_TYPEPROG [ATTACH_FLAGS]
       bpftoolcgroupdetachCGROUPATTACH_TYPEPROGbpftoolcgrouphelpPROG := { idPROG_ID | pinnedFILE | tagPROG_TAG | namePROG_NAME }
       ATTACH_TYPE := { cgroup_inet_ingress | cgroup_inet_egress |
         cgroup_inet_sock_create | cgroup_sock_ops |
         cgroup_device | cgroup_inet4_bind | cgroup_inet6_bind |
         cgroup_inet4_post_bind | cgroup_inet6_post_bind |
         cgroup_inet4_connect | cgroup_inet6_connect |
         cgroup_unix_connect | cgroup_inet4_getpeername |
         cgroup_inet6_getpeername | cgroup_unix_getpeername |
         cgroup_inet4_getsockname | cgroup_inet6_getsockname |
         cgroup_unix_getsockname | cgroup_udp4_sendmsg |
         cgroup_udp6_sendmsg | cgroup_unix_sendmsg |
         cgroup_udp4_recvmsg | cgroup_udp6_recvmsg |
         cgroup_unix_recvmsg | cgroup_sysctl |
         cgroup_getsockopt | cgroup_setsockopt |
         cgroup_inet_sock_release }
       ATTACH_FLAGS := { multi | override }

bpftoolcgroup{show|list}CGROUP[effective]
              List all programs attached to the cgroup CGROUP.

              Output will start with program ID followed by attach type, attach flags and program name.

              If  effective  is  specified  retrieve  effective  programs  that will execute for events within a
              cgroup. This includes inherited along with attached ones.

       bpftoolcgrouptree[CGROUP_ROOT][effective]
              Iterate over all cgroups in CGROUP_ROOT and list all attached programs.   If  CGROUP_ROOT  is  not
              specified, bpftool uses cgroup v2 mountpoint.

              The  output  is similar to the output of cgroup show/list commands: it starts with absolute cgroup
              path, followed by program ID, attach type, attach flags and program name.

              If effective is specified retrieve effective programs  that  will  execute  for  events  within  a
              cgroup. This includes inherited along with attached ones.

       bpftoolcgroupattachCGROUPATTACH_TYPEPROG[ATTACH_FLAGS]
              Attach program PROG to the cgroup CGROUP with attach type ATTACH_TYPE and optional ATTACH_FLAGS.

              ATTACH_FLAGS  can  be  one  of: override if a sub-cgroup installs some bpf program, the program in
              this cgroup yields to sub-cgroup program; multi if a sub-cgroup installs some  bpf  program,  that
              cgroup program gets run in addition to the program in this cgroup.

              Only  one program is allowed to be attached to a cgroup with no attach flags or the override flag.
              Attaching another program will release old program and attach the new one.

              Multiple programs are allowed to be attached to a cgroup with multi.  They are  executed  in  FIFO
              order (those that were attached first, run first).

              Non-default ATTACH_FLAGS are supported by kernel version 4.14 and later.

              ATTACH_TYPE can be one of:

              • ingress ingress path of the inet socket (since 4.10)

              • egress egress path of the inet socket (since 4.10)

              • sock_create opening of an inet socket (since 4.10)

              • sock_ops various socket operations (since 4.12)

              • device device access (since 4.15)

              • bind4 call to bind(2) for an inet4 socket (since 4.17)

              • bind6 call to bind(2) for an inet6 socket (since 4.17)

              • post_bind4 return from bind(2) for an inet4 socket (since 4.17)

              • post_bind6 return from bind(2) for an inet6 socket (since 4.17)

              • connect4 call to connect(2) for an inet4 socket (since 4.17)

              • connect6 call to connect(2) for an inet6 socket (since 4.17)

              • connect_unix call to connect(2) for a unix socket (since 6.7)

              • sendmsg4 call to sendto(2), sendmsg(2), sendmmsg(2) for an unconnected udp4 socket (since 4.18)

              • sendmsg6 call to sendto(2), sendmsg(2), sendmmsg(2) for an unconnected udp6 socket (since 4.18)

              • sendmsg_unix  call  to  sendto(2), sendmsg(2), sendmmsg(2) for an unconnected unix socket (since
                6.7)

              • recvmsg4 call to recvfrom(2), recvmsg(2), recvmmsg(2) for an unconnected udp4 socket (since 5.2)

              • recvmsg6 call to recvfrom(2), recvmsg(2), recvmmsg(2) for an unconnected udp6 socket (since 5.2)

              • recvmsg_unix call to recvfrom(2), recvmsg(2), recvmmsg(2) for an unconnected unix socket  (since
                6.7)

              • sysctl sysctl access (since 5.2)

              • getsockopt call to getsockopt (since 5.3)

              • setsockopt call to setsockopt (since 5.3)

              • getpeername4 call to getpeername(2) for an inet4 socket (since 5.8)

              • getpeername6 call to getpeername(2) for an inet6 socket (since 5.8)

              • getpeername_unix call to getpeername(2) for a unix socket (since 6.7)

              • getsockname4 call to getsockname(2) for an inet4 socket (since 5.8)

              • getsockname6 call to getsockname(2) for an inet6 socket (since 5.8)

              • getsockname_unix call to getsockname(2) for a unix socket (since 6.7)

              • sock_release closing a userspace inet socket (since 5.9)

       bpftoolcgroupdetachCGROUPATTACH_TYPEPROG
              Detach PROG from the cgroup CGROUP and attach type ATTACH_TYPE.

       bpftoolproghelp
              Print short help message.

#mount-tbpfnone/sys/fs/bpf/#mkdir/sys/fs/cgroup/test.slice#bpftoolprogload./device_cgroup.o/sys/fs/bpf/prog#bpftoolcgroupattach/sys/fs/cgroup/test.slice/deviceid1allow_multi#bpftoolcgrouplist/sys/fs/cgroup/test.slice/

          ID       AttachType      AttachFlags     Name
          1        device          allow_multi     bpf_prog1

       #bpftoolcgroupdetach/sys/fs/cgroup/test.slice/deviceid1#bpftoolcgrouplist/sys/fs/cgroup/test.slice/

          ID       AttachType      AttachFlags     Name

       bpftool-cgroup - tool for inspection and simple manipulation of eBPF progs

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

       -V, --version
              Print  bpftool's  version number (similar to bpftoolversion), the number of the libbpf version in
              use, and optional features that were included when bpftool was compiled. Optional features include
              linking against LLVM or libbfd to provide the disassembler for JIT-ted programs (bpftoolprogdumpjited) and usage of BPF skeletons (some  features  like  bpftoolprogprofile  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.

       -f, --bpffs
              Show file names of pinned programs.

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

                                                                                               BPFTOOL-CGROUP(8)

bpftool [OPTIONS] cgroupCOMMANDOPTIONS := { { -j | --json } [{ -p | --pretty }] | { -d | --debug } | { -f | --bpffs } }

       COMMANDS := { show | list | tree | attach | detach | help }