@@ -148,6 +148,8 @@ u32 btf_obj_id(const struct btf *btf);
bool btf_is_kernel(const struct btf *btf);
bool btf_is_module(const struct btf *btf);
struct module *btf_try_get_module(const struct btf *btf);
+struct btf *btf_get_module_btf(const struct module *module);
+void btf_put_module_btf(struct btf *btf);
u32 btf_nr_types(const struct btf *btf);
bool btf_member_is_reg_int(const struct btf *btf, const struct btf_type *s,
const struct btf_member *m,
@@ -534,6 +534,7 @@ s32 btf_find_by_name_kind(const struct btf *btf, const char *name, u8 kind)
return -ENOENT;
}
+EXPORT_SYMBOL_GPL(btf_find_by_name_kind);
static s32 bpf_find_btf_id(const char *name, u32 kind, struct btf **btf_p)
{
@@ -1673,6 +1674,15 @@ void btf_put(struct btf *btf)
}
}
+void btf_put_module_btf(struct btf *btf)
+{
+ if (!btf_is_module(btf))
+ return;
+
+ btf_put(btf);
+}
+EXPORT_SYMBOL_GPL(btf_put_module_btf);
+
static int env_resolve_init(struct btf_verifier_env *env)
{
struct btf *btf = env->btf;
@@ -7051,7 +7061,7 @@ 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;
@@ -7080,6 +7090,7 @@ static struct btf *btf_get_module_btf(const struct module *module)
return btf;
}
+EXPORT_SYMBOL_GPL(btf_get_module_btf);
BPF_CALL_4(bpf_btf_find_by_name_kind, char *, name, int, name_sz, u32, kind, int, flags)
{
This allows modules to lookup their own module BTF info. These are get and set operations that bump the refcount. Thus, modules can use this to control the lifetime. Suggested-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> --- include/linux/btf.h | 2 ++ kernel/bpf/btf.c | 13 ++++++++++++- 2 files changed, 14 insertions(+), 1 deletion(-)