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| author |   Pavel Emelyanov <xemul@openvz.org> | 2007-10-17 21:21:51 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2007-10-17 21:21:51 -0700 |
| commit | 309dd5fc872448e35634d510049642312ebc170d (patch) | |
| tree | 5284d7b48980482ecba06b760ac16d9f94e66ea9 | |
| parent | [NET]: Introduce the sk_detach_filter() call (diff) | |
| download | linux-dev-309dd5fc872448e35634d510049642312ebc170d.tar.xz linux-dev-309dd5fc872448e35634d510049642312ebc170d.zip | |
[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: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/sock.h | 12 | ||||
| -rw-r--r-- | net/core/filter.c | 4 | ||||
| -rw-r--r-- | net/core/sock.c | 2 |
3 files changed, 11 insertions, 7 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 453c79d0915b..b9cfe125c9e6 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -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) diff --git a/net/core/filter.c b/net/core/filter.c index fd607581ab50..2be1830d3c35 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -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(); diff --git a/net/core/sock.c b/net/core/sock.c index 07101381b8b7..d292b4113d6e 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -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); } |