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| author | Andrii Nakryiko <andrii@kernel.org> | 2021-11-11 08:17:57 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-11-12 03:44:26 +0300 |
| commit | a6ca71583137300f207343d5d950cb1c365ab911 (patch) | |
| tree | 14cd9598f4ff1d5a0c74c6a05d1764ea06a27445 /tools | |
| parent | 04f8cb6d6b6752ed14dbf91c616717fa30655ef6 (diff) | |
| download | linux-a6ca71583137300f207343d5d950cb1c365ab911.tar.xz | |
libbpf: Add ability to get/set per-program load flags
Add bpf_program__flags() API to retrieve prog_flags that will be (or
were) supplied to BPF_PROG_LOAD command.
Also add bpf_program__set_extra_flags() API to allow to set *extra*
flags, in addition to those determined by program's SEC() definition.
Such flags are logically OR'ed with libbpf-derived flags.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211111051758.92283-2-andrii@kernel.org
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 14 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 3 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 2 |
3 files changed, 19 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index d869ebee1e27..a823b5ed705b 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -8262,6 +8262,20 @@ void bpf_program__set_expected_attach_type(struct bpf_program *prog, prog->expected_attach_type = type; } +__u32 bpf_program__flags(const struct bpf_program *prog) +{ + return prog->prog_flags; +} + +int bpf_program__set_extra_flags(struct bpf_program *prog, __u32 extra_flags) +{ + if (prog->obj->loaded) + return libbpf_err(-EBUSY); + + prog->prog_flags |= extra_flags; + return 0; +} + #define SEC_DEF(sec_pfx, ptype, atype, flags, ...) { \ .sec = sec_pfx, \ .prog_type = BPF_PROG_TYPE_##ptype, \ diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 039058763173..f69512ae8505 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -493,6 +493,9 @@ LIBBPF_API void bpf_program__set_expected_attach_type(struct bpf_program *prog, enum bpf_attach_type type); +LIBBPF_API __u32 bpf_program__flags(const struct bpf_program *prog); +LIBBPF_API int bpf_program__set_extra_flags(struct bpf_program *prog, __u32 extra_flags); + LIBBPF_API int bpf_program__set_attach_target(struct bpf_program *prog, int attach_prog_fd, const char *attach_func_name); diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index b895861a13c0..256d5d4be951 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -397,8 +397,10 @@ LIBBPF_0.6.0 { bpf_object__prev_program; bpf_prog_load_deprecated; bpf_prog_load; + bpf_program__flags; bpf_program__insn_cnt; bpf_program__insns; + bpf_program__set_extra_flags; btf__add_btf; btf__add_decl_tag; btf__raw_data; |