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| author |   Eduard Zingerman <eddyz87@gmail.com> | 2024-03-06 12:45:15 +0200 |
|---|---|---|
| committer |   Andrii Nakryiko <andrii@kernel.org> | 2024-03-06 15:18:15 -0800 |
| commit | a2a5172cf1eb39472bd2038079f65c6f676906a5 (patch) | |
| tree | 8fa10eaa502c527a8572b6c89958e9e06d1fd0e9 /tools/lib/bpf | |
| parent | Merge branch 'bpf-introduce-may_goto-and-cond_break' (diff) | |
| download | wireguard-linux-a2a5172cf1eb39472bd2038079f65c6f676906a5.tar.xz wireguard-linux-a2a5172cf1eb39472bd2038079f65c6f676906a5.zip | |
libbpf: Allow version suffixes (___smth) for struct_ops types
E.g. allow the following struct_ops definitions:
struct bpf_testmod_ops___v1 { int (*test)(void); };
struct bpf_testmod_ops___v2 { int (*test)(void); };
SEC(".struct_ops.link")
struct bpf_testmod_ops___v1 a = { .test = ... }
SEC(".struct_ops.link")
struct bpf_testmod_ops___v2 b = { .test = ... }
Where both bpf_testmod_ops__v1 and bpf_testmod_ops__v2 would be
resolved as 'struct bpf_testmod_ops' from kernel BTF.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: David Vernet <void@manifault.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240306104529.6453-2-eddyz87@gmail.com
Diffstat (limited to 'tools/lib/bpf')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 6c2979f1b471..e2a4c409980b 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -948,7 +948,7 @@ static int find_btf_by_prefix_kind(const struct btf *btf, const char *prefix, const char *name, __u32 kind); static int -find_struct_ops_kern_types(struct bpf_object *obj, const char *tname, +find_struct_ops_kern_types(struct bpf_object *obj, const char *tname_raw, struct module_btf **mod_btf, const struct btf_type **type, __u32 *type_id, const struct btf_type **vtype, __u32 *vtype_id, @@ -958,8 +958,12 @@ find_struct_ops_kern_types(struct bpf_object *obj, const char *tname, const struct btf_member *kern_data_member; struct btf *btf; __s32 kern_vtype_id, kern_type_id; + char tname[256]; __u32 i; + snprintf(tname, sizeof(tname), "%.*s", + (int)bpf_core_essential_name_len(tname_raw), tname_raw); + kern_type_id = find_ksym_btf_id(obj, tname, BTF_KIND_STRUCT, &btf, mod_btf); if (kern_type_id < 0) { |