diff options
Diffstat (limited to 'net/l2tp/l2tp_core.h')
| -rw-r--r-- | net/l2tp/l2tp_core.h | 64 |
1 files changed, 33 insertions, 31 deletions
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h index cdb6e3327f74..9534e16965cc 100644 --- a/net/l2tp/l2tp_core.h +++ b/net/l2tp/l2tp_core.h @@ -76,6 +76,7 @@ struct l2tp_session_cfg { struct l2tp_session { int magic; /* should be * L2TP_SESSION_MAGIC */ + long dead; struct l2tp_tunnel *tunnel; /* back pointer to tunnel * context */ @@ -128,8 +129,6 @@ struct l2tp_session { int (*build_header)(struct l2tp_session *session, void *buf); void (*recv_skb)(struct l2tp_session *session, struct sk_buff *skb, int data_len); void (*session_close)(struct l2tp_session *session); - void (*ref)(struct l2tp_session *session); - void (*deref)(struct l2tp_session *session); #if IS_ENABLED(CONFIG_L2TP_DEBUGFS) void (*show)(struct seq_file *m, void *priv); #endif @@ -160,8 +159,15 @@ struct l2tp_tunnel_cfg { struct l2tp_tunnel { int magic; /* Should be L2TP_TUNNEL_MAGIC */ + + unsigned long dead; + struct rcu_head rcu; rwlock_t hlist_lock; /* protect session_hlist */ + bool acpt_newsess; /* Indicates whether this + * tunnel accepts new sessions. + * Protected by hlist_lock. + */ struct hlist_head session_hlist[L2TP_HASH_SIZE]; /* hashed list of sessions, * hashed by id */ @@ -197,7 +203,9 @@ struct l2tp_tunnel { }; struct l2tp_nl_cmd_ops { - int (*session_create)(struct net *net, u32 tunnel_id, u32 session_id, u32 peer_session_id, struct l2tp_session_cfg *cfg); + int (*session_create)(struct net *net, struct l2tp_tunnel *tunnel, + u32 session_id, u32 peer_session_id, + struct l2tp_session_cfg *cfg); int (*session_delete)(struct l2tp_session *session); }; @@ -231,14 +239,14 @@ out: return tunnel; } +struct l2tp_tunnel *l2tp_tunnel_get(const struct net *net, u32 tunnel_id); + struct l2tp_session *l2tp_session_get(const struct net *net, struct l2tp_tunnel *tunnel, - u32 session_id, bool do_ref); -struct l2tp_session *l2tp_session_get_nth(struct l2tp_tunnel *tunnel, int nth, - bool do_ref); + u32 session_id); +struct l2tp_session *l2tp_session_get_nth(struct l2tp_tunnel *tunnel, int nth); struct l2tp_session *l2tp_session_get_by_ifname(const struct net *net, - const char *ifname, - bool do_ref); + const char *ifname); struct l2tp_tunnel *l2tp_tunnel_find(const struct net *net, u32 tunnel_id); struct l2tp_tunnel *l2tp_tunnel_find_nth(const struct net *net, int nth); @@ -246,11 +254,14 @@ int l2tp_tunnel_create(struct net *net, int fd, int version, u32 tunnel_id, u32 peer_tunnel_id, struct l2tp_tunnel_cfg *cfg, struct l2tp_tunnel **tunnelp); void l2tp_tunnel_closeall(struct l2tp_tunnel *tunnel); -int l2tp_tunnel_delete(struct l2tp_tunnel *tunnel); +void l2tp_tunnel_delete(struct l2tp_tunnel *tunnel); 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); +int l2tp_session_register(struct l2tp_session *session, + struct l2tp_tunnel *tunnel); + void __l2tp_session_unhash(struct l2tp_session *session); int l2tp_session_delete(struct l2tp_session *session); void l2tp_session_free(struct l2tp_session *session); @@ -269,40 +280,31 @@ int l2tp_nl_register_ops(enum l2tp_pwtype pw_type, void l2tp_nl_unregister_ops(enum l2tp_pwtype pw_type); int l2tp_ioctl(struct sock *sk, int cmd, unsigned long arg); +static inline void l2tp_tunnel_inc_refcount(struct l2tp_tunnel *tunnel) +{ + refcount_inc(&tunnel->ref_count); +} + +static inline void l2tp_tunnel_dec_refcount(struct l2tp_tunnel *tunnel) +{ + if (refcount_dec_and_test(&tunnel->ref_count)) + kfree_rcu(tunnel, rcu); +} + /* Session reference counts. Incremented when code obtains a reference * to a session. */ -static inline void l2tp_session_inc_refcount_1(struct l2tp_session *session) +static inline void l2tp_session_inc_refcount(struct l2tp_session *session) { refcount_inc(&session->ref_count); } -static inline void l2tp_session_dec_refcount_1(struct l2tp_session *session) +static inline void l2tp_session_dec_refcount(struct l2tp_session *session) { if (refcount_dec_and_test(&session->ref_count)) l2tp_session_free(session); } -#ifdef L2TP_REFCNT_DEBUG -#define l2tp_session_inc_refcount(_s) \ -do { \ - pr_debug("l2tp_session_inc_refcount: %s:%d %s: cnt=%d\n", \ - __func__, __LINE__, (_s)->name, \ - refcount_read(&_s->ref_count)); \ - l2tp_session_inc_refcount_1(_s); \ -} while (0) -#define l2tp_session_dec_refcount(_s) \ -do { \ - pr_debug("l2tp_session_dec_refcount: %s:%d %s: cnt=%d\n", \ - __func__, __LINE__, (_s)->name, \ - refcount_read(&_s->ref_count)); \ - l2tp_session_dec_refcount_1(_s); \ -} while (0) -#else -#define l2tp_session_inc_refcount(s) l2tp_session_inc_refcount_1(s) -#define l2tp_session_dec_refcount(s) l2tp_session_dec_refcount_1(s) -#endif - #define l2tp_printk(ptr, type, func, fmt, ...) \ do { \ if (((ptr)->debug) & (type)) \ |