return -ENOENT;
}
+static s32 bpf_find_btf_id(const char *name, u32 kind, struct btf **btf_p)
+{
+ struct btf *btf;
+ s32 ret;
+ int id;
+
+ btf = bpf_get_btf_vmlinux();
+ if (IS_ERR(btf))
+ return PTR_ERR(btf);
+
+ ret = btf_find_by_name_kind(btf, name, kind);
+ /* ret is never zero, since btf_find_by_name_kind returns
+ * positive btf_id or negative error.
+ */
+ if (ret > 0) {
+ btf_get(btf);
+ *btf_p = btf;
+ return ret;
+ }
+
+ /* If name is not found in vmlinux's BTF then search in module's BTFs */
+ spin_lock_bh(&btf_idr_lock);
+ idr_for_each_entry(&btf_idr, btf, id) {
+ if (!btf_is_module(btf))
+ continue;
+ /* linear search could be slow hence unlock/lock
+ * the IDR to avoiding holding it for too long
+ */
+ btf_get(btf);
+ spin_unlock_bh(&btf_idr_lock);
+ ret = btf_find_by_name_kind(btf, name, kind);
+ if (ret > 0) {
+ *btf_p = btf;
+ return ret;
+ }
+ spin_lock_bh(&btf_idr_lock);
+ btf_put(btf);
+ }
+ spin_unlock_bh(&btf_idr_lock);
+ return ret;
+}
+
const struct btf_type *btf_type_skip_modifiers(const struct btf *btf,
u32 id, u32 *res_id)
{
BPF_CALL_4(bpf_btf_find_by_name_kind, char *, name, int, name_sz, u32, kind, int, flags)
{
- struct btf *btf;
+ struct btf *btf = NULL;
+ int btf_obj_fd = 0;
long ret;
if (flags)
if (name_sz <= 1 || name[name_sz - 1])
return -EINVAL;
- btf = bpf_get_btf_vmlinux();
- if (IS_ERR(btf))
- return PTR_ERR(btf);
-
- ret = btf_find_by_name_kind(btf, name, kind);
- /* ret is never zero, since btf_find_by_name_kind returns
- * positive btf_id or negative error.
- */
- if (ret < 0) {
- struct btf *mod_btf;
- int id;
-
- /* If name is not found in vmlinux's BTF then search in module's BTFs */
- spin_lock_bh(&btf_idr_lock);
- idr_for_each_entry(&btf_idr, mod_btf, id) {
- if (!btf_is_module(mod_btf))
- continue;
- /* linear search could be slow hence unlock/lock
- * the IDR to avoiding holding it for too long
- */
- btf_get(mod_btf);
- spin_unlock_bh(&btf_idr_lock);
- ret = btf_find_by_name_kind(mod_btf, name, kind);
- if (ret > 0) {
- int btf_obj_fd;
-
- btf_obj_fd = __btf_new_fd(mod_btf);
- if (btf_obj_fd < 0) {
- btf_put(mod_btf);
- return btf_obj_fd;
- }
- return ret | (((u64)btf_obj_fd) << 32);
- }
- spin_lock_bh(&btf_idr_lock);
- btf_put(mod_btf);
+ ret = bpf_find_btf_id(name, kind, &btf);
+ if (ret > 0 && btf_is_module(btf)) {
+ btf_obj_fd = __btf_new_fd(btf);
+ if (btf_obj_fd < 0) {
+ btf_put(btf);
+ return btf_obj_fd;
}
- spin_unlock_bh(&btf_idr_lock);
+ return ret | (((u64)btf_obj_fd) << 32);
}
+ if (ret > 0)
+ btf_put(btf);
return ret;
}