Commit 309dd5fc authored by Pavel Emelyanov's avatar Pavel Emelyanov Committed by David S. Miller

[NET]: Move the filter releasing into a separate call

This is done merely as a preparation for the fix.

The sk_filter_uncharge() unaccounts the filter memory and calls
the sk_filter_release(), which in turn decrements the refcount
anf frees the filter.

The latter function will be required separately.
Signed-off-by: default avatarPavel Emelyanov <xemul@openvz.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 55b33325
......@@ -922,14 +922,18 @@ static inline void sk_filter_rcu_free(struct rcu_head *rcu)
* Remove a filter from a socket and release its resources.
*/
static inline void sk_filter_release(struct sock *sk, struct sk_filter *fp)
static inline void sk_filter_release(struct sk_filter *fp)
{
if (atomic_dec_and_test(&fp->refcnt))
call_rcu_bh(&fp->rcu, sk_filter_rcu_free);
}
static inline void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp)
{
unsigned int size = sk_filter_len(fp);
atomic_sub(size, &sk->sk_omem_alloc);
if (atomic_dec_and_test(&fp->refcnt))
call_rcu_bh(&fp->rcu, sk_filter_rcu_free);
sk_filter_release(fp);
}
static inline void sk_filter_charge(struct sock *sk, struct sk_filter *fp)
......
......@@ -429,7 +429,7 @@ int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk)
}
if (fp)
sk_filter_release(sk, fp);
sk_filter_uncharge(sk, fp);
return err;
}
......@@ -442,7 +442,7 @@ int sk_detach_filter(struct sock *sk)
filter = rcu_dereference(sk->sk_filter);
if (filter) {
rcu_assign_pointer(sk->sk_filter, NULL);
sk_filter_release(sk, filter);
sk_filter_uncharge(sk, filter);
ret = 0;
}
rcu_read_unlock_bh();
......
......@@ -915,7 +915,7 @@ void sk_free(struct sock *sk)
filter = rcu_dereference(sk->sk_filter);
if (filter) {
sk_filter_release(sk, filter);
sk_filter_uncharge(sk, filter);
rcu_assign_pointer(sk->sk_filter, NULL);
}
......
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