diff options
Diffstat (limited to 'tools/lib/bpf/bpf.c')
| -rw-r--r-- | tools/lib/bpf/bpf.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 70575a37aa14..d27e34133973 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -586,19 +586,31 @@ int bpf_link_create(int prog_fd, int target_fd, enum bpf_attach_type attach_type, const struct bpf_link_create_opts *opts) { + __u32 target_btf_id, iter_info_len; union bpf_attr attr; if (!OPTS_VALID(opts, bpf_link_create_opts)) return -EINVAL; + iter_info_len = OPTS_GET(opts, iter_info_len, 0); + target_btf_id = OPTS_GET(opts, target_btf_id, 0); + + if (iter_info_len && target_btf_id) + return -EINVAL; + memset(&attr, 0, sizeof(attr)); attr.link_create.prog_fd = prog_fd; attr.link_create.target_fd = target_fd; attr.link_create.attach_type = attach_type; attr.link_create.flags = OPTS_GET(opts, flags, 0); - attr.link_create.iter_info = - ptr_to_u64(OPTS_GET(opts, iter_info, (void *)0)); - attr.link_create.iter_info_len = OPTS_GET(opts, iter_info_len, 0); + + if (iter_info_len) { + attr.link_create.iter_info = + ptr_to_u64(OPTS_GET(opts, iter_info, (void *)0)); + attr.link_create.iter_info_len = iter_info_len; + } else if (target_btf_id) { + attr.link_create.target_btf_id = target_btf_id; + } return sys_bpf(BPF_LINK_CREATE, &attr, sizeof(attr)); } |