diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/filter.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 9730e7fe4770..5b3427aaeca5 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -664,14 +664,37 @@ static void sk_release_orig_filter(struct sk_filter *fp) * sk_filter_release_rcu - Release a socket filter by rcu_head * @rcu: rcu_head that contains the sk_filter to free */ -void sk_filter_release_rcu(struct rcu_head *rcu) +static void sk_filter_release_rcu(struct rcu_head *rcu) { struct sk_filter *fp = container_of(rcu, struct sk_filter, rcu); sk_release_orig_filter(fp); bpf_jit_free(fp); } -EXPORT_SYMBOL(sk_filter_release_rcu); + +/** + * sk_filter_release - release a socket filter + * @fp: filter to remove + * + * Remove a filter from a socket and release its resources. + */ +static void sk_filter_release(struct sk_filter *fp) +{ + if (atomic_dec_and_test(&fp->refcnt)) + call_rcu(&fp->rcu, sk_filter_release_rcu); +} + +void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp) +{ + atomic_sub(sk_filter_size(fp->len), &sk->sk_omem_alloc); + sk_filter_release(fp); +} + +void sk_filter_charge(struct sock *sk, struct sk_filter *fp) +{ + atomic_inc(&fp->refcnt); + atomic_add(sk_filter_size(fp->len), &sk->sk_omem_alloc); +} static int __sk_prepare_filter(struct sk_filter *fp) { |