From b85fab0e67b162014cd328cb4e2a8e8ae382cb8a Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Wed, 25 Apr 2018 19:41:06 +0200 Subject: [PATCH] bpf: Add gpl_compatible flag to struct bpf_prog_info Adding gpl_compatible flag to struct bpf_prog_info so it can be dumped via bpf_prog_get_info_by_fd and displayed via bpftool progs dump. Alexei noticed 4-byte hole in struct bpf_prog_info, so we put the u32 flags field in there, and we can keep adding bit fields in there without breaking user space. Signed-off-by: Jiri Olsa Signed-off-by: Daniel Borkmann --- include/uapi/linux/bpf.h | 1 + kernel/bpf/syscall.c | 1 + 2 files changed, 2 insertions(+) diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index e6679393b687..da8801860c7d 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -1060,6 +1060,7 @@ struct bpf_prog_info { __aligned_u64 map_ids; char name[BPF_OBJ_NAME_LEN]; __u32 ifindex; + __u32 gpl_compatible:1; __u64 netns_dev; __u64 netns_ino; } __attribute__((aligned(8))); diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index fe23dc5a3ec4..7bb4ff1c770a 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -1914,6 +1914,7 @@ static int bpf_prog_get_info_by_fd(struct bpf_prog *prog, info.load_time = prog->aux->load_time; info.created_by_uid = from_kuid_munged(current_user_ns(), prog->aux->user->uid); + info.gpl_compatible = prog->gpl_compatible; memcpy(info.tag, prog->tag, sizeof(prog->tag)); memcpy(info.name, prog->aux->name, sizeof(prog->aux->name));