diff options
Diffstat (limited to 'net/rxrpc/ar-internal.h')
| -rw-r--r-- | net/rxrpc/ar-internal.h | 58 |
1 files changed, 48 insertions, 10 deletions
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index 5292bf0bce52..c761124961cc 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -255,6 +255,9 @@ enum rxrpc_conn_flag { RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ + RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ + RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ + RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ }; /* @@ -265,6 +268,17 @@ enum rxrpc_conn_event { }; /* + * The connection cache state. + */ +enum rxrpc_conn_cache_state { + RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ + RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ + RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ + RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ + RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ +}; + +/* * The connection protocol state. */ enum rxrpc_conn_proto_state { @@ -276,6 +290,7 @@ enum rxrpc_conn_proto_state { RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ RXRPC_CONN_NETWORK_ERROR, /* Conn terminated by network error */ + RXRPC_CONN_LOCAL_ERROR, /* Conn terminated by local error */ RXRPC_CONN__NR_STATES }; @@ -288,8 +303,14 @@ struct rxrpc_connection { struct rxrpc_conn_proto proto; struct rxrpc_conn_parameters params; - spinlock_t channel_lock; + atomic_t usage; + struct rcu_head rcu; + struct list_head cache_link; + spinlock_t channel_lock; + unsigned char active_chans; /* Mask of active channels */ +#define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) + struct list_head waiting_calls; /* Calls waiting for channels */ struct rxrpc_channel { struct rxrpc_call __rcu *call; /* Active call */ u32 call_id; /* ID of current call */ @@ -302,14 +323,13 @@ struct rxrpc_connection { u32 last_abort; }; } channels[RXRPC_MAXCALLS]; - wait_queue_head_t channel_wq; /* queue to wait for channel to become available */ - struct rcu_head rcu; struct work_struct processor; /* connection event processor */ union { struct rb_node client_node; /* Node in local->client_conns */ struct rb_node service_node; /* Node in peer->service_conns */ }; + struct list_head proc_link; /* link in procfs list */ struct list_head link; /* link in master connection list */ struct sk_buff_head rx_queue; /* received conn-level packets */ const struct rxrpc_security *security; /* applied security module */ @@ -320,7 +340,7 @@ struct rxrpc_connection { unsigned long events; unsigned long idle_timestamp; /* Time at which last became idle */ spinlock_t state_lock; /* state-change lock */ - atomic_t usage; + enum rxrpc_conn_cache_state cache_state : 8; enum rxrpc_conn_proto_state state : 8; /* current state of connection */ u32 local_abort; /* local abort code */ u32 remote_abort; /* remote abort code */ @@ -328,7 +348,6 @@ struct rxrpc_connection { int debug_id; /* debug ID for printks */ atomic_t serial; /* packet serial number counter */ unsigned int hi_serial; /* highest serial number received */ - atomic_t avail_chans; /* number of channels available */ u8 size_align; /* data size alignment (for security) */ u8 header_size; /* rxrpc + security header size */ u8 security_size; /* security header size */ @@ -350,6 +369,7 @@ enum rxrpc_call_flag { RXRPC_CALL_HAS_USERID, /* has a user ID attached */ RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ RXRPC_CALL_IS_SERVICE, /* Call is service call */ + RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ }; /* @@ -416,13 +436,14 @@ struct rxrpc_call { struct work_struct destroyer; /* call destroyer */ struct work_struct processor; /* packet processor and ACK generator */ struct list_head link; /* link in master call list */ + struct list_head chan_wait_link; /* Link in conn->waiting_calls */ struct hlist_node error_link; /* link in error distribution list */ struct list_head accept_link; /* calls awaiting acceptance */ struct rb_node sock_node; /* node in socket call tree */ struct sk_buff_head rx_queue; /* received packets */ struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ struct sk_buff *tx_pending; /* Tx socket buffer being filled */ - wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ + wait_queue_head_t waitq; /* Wait queue for channel or Tx */ __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ unsigned long user_call_ID; /* user-defined call ID */ unsigned long creation_jif; /* time of call creation */ @@ -545,12 +566,19 @@ static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) /* * conn_client.c */ +extern unsigned int rxrpc_max_client_connections; +extern unsigned int rxrpc_reap_client_connections; +extern unsigned int rxrpc_conn_idle_client_expiry; +extern unsigned int rxrpc_conn_idle_client_fast_expiry; extern struct idr rxrpc_client_conn_ids; void rxrpc_destroy_client_conn_ids(void); int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, gfp_t); -void rxrpc_unpublish_client_conn(struct rxrpc_connection *); +void rxrpc_expose_client_call(struct rxrpc_call *); +void rxrpc_disconnect_client_call(struct rxrpc_call *); +void rxrpc_put_client_conn(struct rxrpc_connection *); +void __exit rxrpc_destroy_all_client_connections(void); /* * conn_event.c @@ -564,14 +592,16 @@ void rxrpc_reject_packets(struct rxrpc_local *); */ extern unsigned int rxrpc_connection_expiry; extern struct list_head rxrpc_connections; +extern struct list_head rxrpc_connection_proc_list; extern rwlock_t rxrpc_connection_lock; int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, struct sk_buff *); -void __rxrpc_disconnect_call(struct rxrpc_call *); +void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); void rxrpc_disconnect_call(struct rxrpc_call *); +void rxrpc_kill_connection(struct rxrpc_connection *); void __rxrpc_put_connection(struct rxrpc_connection *); void __exit rxrpc_destroy_all_connections(void); @@ -598,8 +628,16 @@ struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *con static inline void rxrpc_put_connection(struct rxrpc_connection *conn) { - if (conn && atomic_dec_return(&conn->usage) == 1) - __rxrpc_put_connection(conn); + if (!conn) + return; + + if (rxrpc_conn_is_client(conn)) { + if (atomic_dec_and_test(&conn->usage)) + rxrpc_put_client_conn(conn); + } else { + if (atomic_dec_return(&conn->usage) == 1) + __rxrpc_put_connection(conn); + } } |