bpf: btf: Add BPF_BTF_LOAD command
authorMartin KaFai Lau <kafai@fb.com>
Wed, 18 Apr 2018 22:56:01 +0000 (15:56 -0700)
committerDaniel Borkmann <daniel@iogearbox.net>
Thu, 19 Apr 2018 19:46:25 +0000 (21:46 +0200)
commitf56a653c1fd13a197076dec4461c656fd2adec73
treed6ccb94ff2fa8c17a385e4ca29ec6e4b446829a4
parentb00b8daec828dd59af7d1f7a42acd6e5867f80c6
bpf: btf: Add BPF_BTF_LOAD command

This patch adds a BPF_BTF_LOAD command which
1) loads and verifies the BTF (implemented in earlier patches)
2) returns a BTF fd to userspace.  In the next patch, the
   BTF fd can be specified during BPF_MAP_CREATE.

It currently limits to CAP_SYS_ADMIN.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
include/linux/btf.h
include/uapi/linux/bpf.h
kernel/bpf/btf.c
kernel/bpf/syscall.c