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| author | Andrii Nakryiko <andrii@kernel.org> | 2020-10-08 02:10:21 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-10-08 03:50:27 +0200 |
| commit | 47f7cf6325f7d38e33d3dc38fa55bbe605f5b335 (patch) | |
| tree | 1a3bfa8612f31b91b57f683922639eb5acbf4018 /tools | |
| parent | libbpf: Fix compatibility problem in xsk_socket__create (diff) | |
| download | linux-47f7cf6325f7d38e33d3dc38fa55bbe605f5b335.tar.xz linux-47f7cf6325f7d38e33d3dc38fa55bbe605f5b335.zip | |
libbpf: Skip CO-RE relocations for not loaded BPF programs
Bypass CO-RE relocations step for BPF programs that are not going to be
loaded. This allows to have BPF programs compiled in and disabled dynamically
if kernel is not supposed to provide enough relocation information. In such
case, there won't be unnecessary warnings about failed relocations.
Fixes: d929758101fc ("libbpf: Support disabling auto-loading BPF programs")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201008001025.292064-2-andrii@kernel.org
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index faec389c4849..07d62771472f 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -5765,6 +5765,11 @@ bpf_object__relocate_core(struct bpf_object *obj, const char *targ_btf_path) err = -EINVAL; goto out; } + /* no need to apply CO-RE relocation if the program is + * not going to be loaded + */ + if (!prog->load) + continue; err = bpf_core_apply_relo(prog, rec, i, obj->btf, targ_btf, cand_cache); |