diff options
Diffstat (limited to 'include/net/sock.h')
| -rw-r--r-- | include/net/sock.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index e9b1dbab90d0..11b81551041e 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -491,6 +491,9 @@ extern int sk_wait_data(struct sock *sk, long *timeo); struct request_sock_ops; +/* Here is the right place to enable sock refcounting debugging */ +#define SOCK_REFCNT_DEBUG + /* Networking protocol blocks we attach to sockets. * socket layer -> transport layer interface * transport -> network interface is defined by struct inet_proto @@ -561,7 +564,9 @@ struct proto { char name[32]; struct list_head node; - +#ifdef SOCK_REFCNT_DEBUG + atomic_t socks; +#endif struct { int inuse; u8 __pad[SMP_CACHE_BYTES - sizeof(int)]; @@ -571,6 +576,31 @@ struct proto { extern int proto_register(struct proto *prot, int alloc_slab); extern void proto_unregister(struct proto *prot); +#ifdef SOCK_REFCNT_DEBUG +static inline void sk_refcnt_debug_inc(struct sock *sk) +{ + atomic_inc(&sk->sk_prot->socks); +} + +static inline void sk_refcnt_debug_dec(struct sock *sk) +{ + atomic_dec(&sk->sk_prot->socks); + printk(KERN_DEBUG "%s socket %p released, %d are still alive\n", + sk->sk_prot->name, sk, atomic_read(&sk->sk_prot->socks)); +} + +static inline void sk_refcnt_debug_release(const struct sock *sk) +{ + if (atomic_read(&sk->sk_refcnt) != 1) + printk(KERN_DEBUG "Destruction of the %s socket %p delayed, refcnt=%d\n", + sk->sk_prot->name, sk, atomic_read(&sk->sk_refcnt)); +} +#else /* SOCK_REFCNT_DEBUG */ +#define sk_refcnt_debug_inc(sk) do { } while (0) +#define sk_refcnt_debug_dec(sk) do { } while (0) +#define sk_refcnt_debug_release(sk) do { } while (0) +#endif /* SOCK_REFCNT_DEBUG */ + /* Called with local bh disabled */ static __inline__ void sock_prot_inc_use(struct proto *prot) { |