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| author | Andrii Nakryiko <andrii@kernel.org> | 2024-01-05 03:09:05 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2024-01-24 01:40:21 +0300 |
| commit | 522bb2c1f82b12eb7befaae815d1d959b8e6bba2 (patch) | |
| tree | 7ff504f352fe6f75aa63f2c612504b0ffbe22483 /include/linux/bpf.h | |
| parent | 54c11ec4935a61af32bb03fc52e7172c97bd7203 (diff) | |
| download | linux-522bb2c1f82b12eb7befaae815d1d959b8e6bba2.tar.xz | |
bpf: support multiple tags per argument
Add ability to iterate multiple decl_tag types pointed to the same
function argument. Use this to support multiple __arg_xxx tags per
global subprog argument.
We leave btf_find_decl_tag_value() intact, but change its implementation
to use a new btf_find_next_decl_tag() which can be straightforwardly
used to find next BTF type ID of a matching btf_decl_tag type.
btf_prepare_func_args() is switched from btf_find_decl_tag_value() to
btf_find_next_decl_tag() to gain multiple tags per argument support.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20240105000909.2818934-5-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/linux/bpf.h')
| -rw-r--r-- | include/linux/bpf.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index e30100597d0a..377857b232c6 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -2472,6 +2472,8 @@ int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *pr struct btf *btf, const struct btf_type *t); const char *btf_find_decl_tag_value(const struct btf *btf, const struct btf_type *pt, int comp_idx, const char *tag_key); +int btf_find_next_decl_tag(const struct btf *btf, const struct btf_type *pt, + int comp_idx, const char *tag_key, int last_id); struct bpf_prog *bpf_prog_by_id(u32 id); struct bpf_link *bpf_link_by_id(u32 id); |