diff options
Diffstat (limited to 'net/l2tp/l2tp_core.c')
| -rw-r--r-- | net/l2tp/l2tp_core.c | 53 |
1 files changed, 40 insertions, 13 deletions
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c index 1712af1c7b3..c64ce0a0bb0 100644 --- a/net/l2tp/l2tp_core.c +++ b/net/l2tp/l2tp_core.c @@ -111,6 +111,10 @@ struct l2tp_net { spinlock_t l2tp_session_hlist_lock; }; +static void l2tp_session_set_header_len(struct l2tp_session *session, int version); +static void l2tp_tunnel_free(struct l2tp_tunnel *tunnel); +static void l2tp_tunnel_closeall(struct l2tp_tunnel *tunnel); + static inline struct l2tp_net *l2tp_pernet(struct net *net) { BUG_ON(!net); @@ -118,6 +122,34 @@ static inline struct l2tp_net *l2tp_pernet(struct net *net) return net_generic(net, l2tp_net_id); } + +/* Tunnel reference counts. Incremented per session that is added to + * the tunnel. + */ +static inline void l2tp_tunnel_inc_refcount_1(struct l2tp_tunnel *tunnel) +{ + atomic_inc(&tunnel->ref_count); +} + +static inline void l2tp_tunnel_dec_refcount_1(struct l2tp_tunnel *tunnel) +{ + if (atomic_dec_and_test(&tunnel->ref_count)) + l2tp_tunnel_free(tunnel); +} +#ifdef L2TP_REFCNT_DEBUG +#define l2tp_tunnel_inc_refcount(_t) do { \ + printk(KERN_DEBUG "l2tp_tunnel_inc_refcount: %s:%d %s: cnt=%d\n", __func__, __LINE__, (_t)->name, atomic_read(&_t->ref_count)); \ + l2tp_tunnel_inc_refcount_1(_t); \ + } while (0) +#define l2tp_tunnel_dec_refcount(_t) do { \ + printk(KERN_DEBUG "l2tp_tunnel_dec_refcount: %s:%d %s: cnt=%d\n", __func__, __LINE__, (_t)->name, atomic_read(&_t->ref_count)); \ + l2tp_tunnel_dec_refcount_1(_t); \ + } while (0) +#else +#define l2tp_tunnel_inc_refcount(t) l2tp_tunnel_inc_refcount_1(t) +#define l2tp_tunnel_dec_refcount(t) l2tp_tunnel_dec_refcount_1(t) +#endif + /* Session hash global list for L2TPv3. * The session_id SHOULD be random according to RFC3931, but several * L2TP implementations use incrementing session_ids. So we do a real @@ -699,8 +731,8 @@ EXPORT_SYMBOL(l2tp_recv_common); * Returns 1 if the packet was not a good data packet and could not be * forwarded. All such packets are passed up to userspace to deal with. */ -int l2tp_udp_recv_core(struct l2tp_tunnel *tunnel, struct sk_buff *skb, - int (*payload_hook)(struct sk_buff *skb)) +static int l2tp_udp_recv_core(struct l2tp_tunnel *tunnel, struct sk_buff *skb, + int (*payload_hook)(struct sk_buff *skb)) { struct l2tp_session *session = NULL; unsigned char *ptr, *optr; @@ -812,7 +844,6 @@ error: return 1; } -EXPORT_SYMBOL_GPL(l2tp_udp_recv_core); /* UDP encapsulation receive handler. See net/ipv4/udp.c. * Return codes: @@ -922,7 +953,8 @@ static int l2tp_build_l2tpv3_header(struct l2tp_session *session, void *buf) return bufp - optr; } -int l2tp_xmit_core(struct l2tp_session *session, struct sk_buff *skb, size_t data_len) +static int l2tp_xmit_core(struct l2tp_session *session, struct sk_buff *skb, + size_t data_len) { struct l2tp_tunnel *tunnel = session->tunnel; unsigned int len = skb->len; @@ -970,7 +1002,6 @@ int l2tp_xmit_core(struct l2tp_session *session, struct sk_buff *skb, size_t dat return 0; } -EXPORT_SYMBOL_GPL(l2tp_xmit_core); /* Automatically called when the skb is freed. */ @@ -1089,7 +1120,7 @@ EXPORT_SYMBOL_GPL(l2tp_xmit_skb); * The tunnel context is deleted only when all session sockets have been * closed. */ -void l2tp_tunnel_destruct(struct sock *sk) +static void l2tp_tunnel_destruct(struct sock *sk) { struct l2tp_tunnel *tunnel; @@ -1128,11 +1159,10 @@ void l2tp_tunnel_destruct(struct sock *sk) end: return; } -EXPORT_SYMBOL(l2tp_tunnel_destruct); /* When the tunnel is closed, all the attached sessions need to go too. */ -void l2tp_tunnel_closeall(struct l2tp_tunnel *tunnel) +static void l2tp_tunnel_closeall(struct l2tp_tunnel *tunnel) { int hash; struct hlist_node *walk; @@ -1193,12 +1223,11 @@ again: } write_unlock_bh(&tunnel->hlist_lock); } -EXPORT_SYMBOL_GPL(l2tp_tunnel_closeall); /* Really kill the tunnel. * Come here only when all sessions have been cleared from the tunnel. */ -void l2tp_tunnel_free(struct l2tp_tunnel *tunnel) +static void l2tp_tunnel_free(struct l2tp_tunnel *tunnel) { struct l2tp_net *pn = l2tp_pernet(tunnel->l2tp_net); @@ -1217,7 +1246,6 @@ void l2tp_tunnel_free(struct l2tp_tunnel *tunnel) atomic_dec(&l2tp_tunnel_count); kfree(tunnel); } -EXPORT_SYMBOL_GPL(l2tp_tunnel_free); /* Create a socket for the tunnel, if one isn't set up by * userspace. This is used for static tunnels where there is no @@ -1512,7 +1540,7 @@ EXPORT_SYMBOL_GPL(l2tp_session_delete); /* We come here whenever a session's send_seq, cookie_len or * l2specific_len parameters are set. */ -void l2tp_session_set_header_len(struct l2tp_session *session, int version) +static void l2tp_session_set_header_len(struct l2tp_session *session, int version) { if (version == L2TP_HDR_VER_2) { session->hdr_len = 6; @@ -1525,7 +1553,6 @@ void l2tp_session_set_header_len(struct l2tp_session *session, int version) } } -EXPORT_SYMBOL_GPL(l2tp_session_set_header_len); struct l2tp_session *l2tp_session_create(int priv_size, struct l2tp_tunnel *tunnel, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg) { |