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bpf: Make btf_get_module_btf() and btf_relocate_id() non-static

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Drop the static qualifier and add prototypes to <linux/btf.h> so the
tracing core can look up module BTF and translate ids stored by
resolve_btfids (which are local to a module's split BTF) into the
runtime ids used by the kernel.

Used by the upcoming events/<sys>/<event>/btf_ids tracefs interface.

Link: https://patch.msgid.link/20260518-generic_tracepoint-v2-1-b755a5cf67bb@meta.com
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Mykyta Yatsenko
2026-05-18 08:23:15 -07:00
committed by Steven Rostedt
parent f5098b6bae
commit f8c9b3051d
2 changed files with 4 additions and 2 deletions
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2
include/linux/btf.h
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@@ -235,6 +235,8 @@ int btf_check_and_fixup_fields(const struct btf *btf, struct btf_record *rec);
bool btf_type_is_void(const struct btf_type *t);
s32 btf_find_by_name_kind(const struct btf *btf, const char *name, u8 kind);
s32 bpf_find_btf_id(const char *name, u32 kind, struct btf **btf_p);
struct btf *btf_get_module_btf(const struct module *module);
__u32 btf_relocate_id(const struct btf *btf, __u32 id);
const struct btf_type *btf_type_skip_modifiers(const struct btf *btf,
u32 id, u32 *res_id);
const struct btf_type *btf_type_resolve_ptr(const struct btf *btf,

4
kernel/bpf/btf.c
View File

@@ -6467,7 +6467,7 @@ struct btf *btf_parse_vmlinux(void)
* split BTF ids will need to be mapped to actual base/split ids for
* BTF now that it has been relocated.
*/
static __u32 btf_relocate_id(const struct btf *btf, __u32 id)
__u32 btf_relocate_id(const struct btf *btf, __u32 id)
{
if (!btf->base_btf || !btf->base_id_map)
return id;
@@ -8630,7 +8630,7 @@ struct module *btf_try_get_module(const struct btf *btf)
/* Returns struct btf corresponding to the struct module.
* This function can return NULL or ERR_PTR.
*/
static struct btf *btf_get_module_btf(const struct module *module)
struct btf *btf_get_module_btf(const struct module *module)
{
#ifdef CONFIG_DEBUG_INFO_BTF_MODULES
struct btf_module *btf_mod, *tmp;