2022-06-10 09:58 UTC-0700 ~ Stanislav Fomichev <sdf@xxxxxxxxxx>
> $ bpftool --nomount prog loadall $KDIR/tools/testing/selftests/bpf/lsm_cgroup.o /sys/fs/bpf/x
> $ bpftool cgroup attach /sys/fs/cgroup lsm_cgroup pinned /sys/fs/bpf/x/socket_alloc
> $ bpftool cgroup attach /sys/fs/cgroup lsm_cgroup pinned /sys/fs/bpf/x/socket_bind
> $ bpftool cgroup attach /sys/fs/cgroup lsm_cgroup pinned /sys/fs/bpf/x/socket_clone
> $ bpftool cgroup attach /sys/fs/cgroup lsm_cgroup pinned /sys/fs/bpf/x/socket_post_create
> $ bpftool cgroup tree
> CgroupPath
> ID AttachType AttachFlags Name
> /sys/fs/cgroup
> 6 lsm_cgroup socket_post_create bpf_lsm_socket_post_create
> 8 lsm_cgroup socket_bind bpf_lsm_socket_bind
> 10 lsm_cgroup socket_alloc bpf_lsm_sk_alloc_security
> 11 lsm_cgroup socket_clone bpf_lsm_inet_csk_clone
>
> $ bpftool cgroup detach /sys/fs/cgroup lsm_cgroup pinned /sys/fs/bpf/x/socket_post_create
> $ bpftool cgroup tree
> CgroupPath
> ID AttachType AttachFlags Name
> /sys/fs/cgroup
> 8 lsm_cgroup socket_bind bpf_lsm_socket_bind
> 10 lsm_cgroup socket_alloc bpf_lsm_sk_alloc_security
> 11 lsm_cgroup socket_clone bpf_lsm_inet_csk_clone
>
> Signed-off-by: Stanislav Fomichev <sdf@xxxxxxxxxx>
The changes for bpftool look good to me, thanks!
Reviewed-by: Quentin Monnet <quentin@xxxxxxxxxxxxx>
> ---
> tools/bpf/bpftool/cgroup.c | 80 +++++++++++++++++++++++++++-----------
> 1 file changed, 58 insertions(+), 22 deletions(-)
>
> diff --git a/tools/bpf/bpftool/cgroup.c b/tools/bpf/bpftool/cgroup.c
> index 42421fe47a58..6e55f583a62f 100644
> --- a/tools/bpf/bpftool/cgroup.c
> +++ b/tools/bpf/bpftool/cgroup.c
> @@ -542,5 +577,6 @@ static const struct cmd cmds[] = {
>
> int do_cgroup(int argc, char **argv)
> {
> + btf_vmlinux = libbpf_find_kernel_btf();
> return cmd_select(cmds, argc, argv, do_help);
> }
This is not required for all "bpftool cgroup" operations (attach/detach
don't need it I think), but should be inexpensive, right?
Quentin
