diff options
Diffstat (limited to 'kernel/bpf/helpers.c')
| -rw-r--r-- | kernel/bpf/helpers.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index e2dbd9644e5c..57ff8a60222c 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -1917,6 +1917,20 @@ __bpf_kfunc void bpf_obj_drop_impl(void *p__alloc, void *meta__ign) __bpf_obj_drop_impl(p, meta ? meta->record : NULL); } +__bpf_kfunc void *bpf_refcount_acquire_impl(void *p__refcounted_kptr, void *meta__ign) +{ + struct btf_struct_meta *meta = meta__ign; + struct bpf_refcount *ref; + + /* Could just cast directly to refcount_t *, but need some code using + * bpf_refcount type so that it is emitted in vmlinux BTF + */ + ref = (struct bpf_refcount *)p__refcounted_kptr + meta->record->refcount_off; + + refcount_inc((refcount_t *)ref); + return (void *)p__refcounted_kptr; +} + static void __bpf_list_add(struct bpf_list_node *node, struct bpf_list_head *head, bool tail) { struct list_head *n = (void *)node, *h = (void *)head; @@ -2276,6 +2290,7 @@ BTF_ID_FLAGS(func, crash_kexec, KF_DESTRUCTIVE) #endif BTF_ID_FLAGS(func, bpf_obj_new_impl, KF_ACQUIRE | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_obj_drop_impl, KF_RELEASE) +BTF_ID_FLAGS(func, bpf_refcount_acquire_impl, KF_ACQUIRE) BTF_ID_FLAGS(func, bpf_list_push_front) BTF_ID_FLAGS(func, bpf_list_push_back) BTF_ID_FLAGS(func, bpf_list_pop_front, KF_ACQUIRE | KF_RET_NULL) |