/* AF_RXRPC internal definitions * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include #include #include #include #include #if 0 #define CHECK_SLAB_OKAY(X) \ BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ (POISON_FREE << 8 | POISON_FREE)) #else #define CHECK_SLAB_OKAY(X) do {} while (0) #endif #define FCRYPT_BSIZE 8 struct rxrpc_crypt { union { u8 x[FCRYPT_BSIZE]; __be32 n[2]; }; } __attribute__((aligned(8))); #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) #define rxrpc_queue_delayed_work(WS,D) \ queue_delayed_work(rxrpc_workqueue, (WS), (D)) struct rxrpc_connection; /* * Mark applied to socket buffers. */ enum rxrpc_skb_mark { RXRPC_SKB_MARK_DATA, /* data message */ RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ RXRPC_SKB_MARK_BUSY, /* server busy message */ RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */ RXRPC_SKB_MARK_NET_ERROR, /* network error message */ RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ RXRPC_SKB_MARK_NEW_CALL, /* local error message */ }; /* * sk_state for RxRPC sockets */ enum { RXRPC_UNBOUND = 0, RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ RXRPC_CLIENT_BOUND, /* client local address bound */ RXRPC_SERVER_BOUND, /* server local address bound */ RXRPC_SERVER_LISTENING, /* server listening for connections */ RXRPC_CLOSE, /* socket is being closed */ }; /* * RxRPC socket definition */ struct rxrpc_sock { /* WARNING: sk has to be the first member */ struct sock sk; rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ struct rxrpc_local *local; /* local endpoint */ struct hlist_node listen_link; /* link in the local endpoint's listen list */ struct list_head secureq; /* calls awaiting connection security clearance */ struct list_head acceptq; /* calls awaiting acceptance */ struct key *key; /* security for this socket */ struct key *securities; /* list of server security descriptors */ struct rb_root calls; /* outstanding calls on this socket */ unsigned long flags; #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ rwlock_t call_lock; /* lock for calls */ u32 min_sec_level; /* minimum security level */ #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT bool exclusive; /* Exclusive connection for a client socket */ sa_family_t family; /* Protocol family created with */ struct sockaddr_rxrpc srx; /* local address */ struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ }; #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) /* * CPU-byteorder normalised Rx packet header. */ struct rxrpc_host_header { u32 epoch; /* client boot timestamp */ u32 cid; /* connection and channel ID */ u32 callNumber; /* call ID (0 for connection-level packets) */ u32 seq; /* sequence number of pkt in call stream */ u32 serial; /* serial number of pkt sent to network */ u8 type; /* packet type */ u8 flags; /* packet flags */ u8 userStatus; /* app-layer defined status */ u8 securityIndex; /* security protocol ID */ union { u16 _rsvd; /* reserved */ u16 cksum; /* kerberos security checksum */ }; u16 serviceId; /* service ID */ } __packed; /* * RxRPC socket buffer private variables * - max 48 bytes (struct sk_buff::cb) */ struct rxrpc_skb_priv { struct rxrpc_call *call; /* call with which associated */ unsigned long resend_at; /* time in jiffies at which to resend */ union { unsigned int offset; /* offset into buffer of next read */ int remain; /* amount of space remaining for next write */ u32 error; /* network error code */ bool need_resend; /* T if needs resending */ }; struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ }; #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) /* * RxRPC security module interface */ struct rxrpc_security { const char *name; /* name of this service */ u8 security_index; /* security type provided */ /* Initialise a security service */ int (*init)(void); /* Clean up a security service */ void (*exit)(void); /* initialise a connection's security */ int (*init_connection_security)(struct rxrpc_connection *); /* prime a connection's packet security */ int (*prime_packet_security)(struct rxrpc_connection *); /* impose security on a packet */ int (*secure_packet)(struct rxrpc_call *, struct sk_buff *, size_t, void *); /* verify the security on a received packet */ int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, rxrpc_seq_t, u16); /* issue a challenge */ int (*issue_challenge)(struct rxrpc_connection *); /* respond to a challenge */ int (*respond_to_challenge)(struct rxrpc_connection *, struct sk_buff *, u32 *); /* verify a response */ int (*verify_response)(struct rxrpc_connection *, struct sk_buff *, u32 *); /* clear connection security */ void (*clear)(struct rxrpc_connection *); }; /* * RxRPC local transport endpoint description * - owned by a single AF_RXRPC socket * - pointed to by transport socket struct sk_user_data */ struct rxrpc_local { struct rcu_head rcu; atomic_t usage; struct list_head link; struct socket *socket; /* my UDP socket */ struct work_struct processor; struct hlist_head services; /* services listening on this endpoint */ struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ struct sk_buff_head reject_queue; /* packets awaiting rejection */ struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ struct rb_root client_conns; /* Client connections by socket params */ spinlock_t client_conns_lock; /* Lock for client_conns */ spinlock_t lock; /* access lock */ rwlock_t services_lock; /* lock for services list */ int debug_id; /* debug ID for printks */ bool dead; struct sockaddr_rxrpc srx; /* local address */ }; /* * RxRPC remote transport endpoint definition * - matched by local endpoint, remote port, address and protocol type */ struct rxrpc_peer { struct rcu_head rcu; /* This must be first */ atomic_t usage; unsigned long hash_key; struct hlist_node hash_link; struct rxrpc_local *local; struct hlist_head error_targets; /* targets for net error distribution */ struct work_struct error_distributor; struct rb_root service_conns; /* Service connections */ seqlock_t service_conn_lock; spinlock_t lock; /* access lock */ unsigned int if_mtu; /* interface MTU for this peer */ unsigned int mtu; /* network MTU for this peer */ unsigned int maxdata; /* data size (MTU - hdrsize) */ unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ int debug_id; /* debug ID for printks */ int error_report; /* Net (+0) or local (+1000000) to distribute */ #define RXRPC_LOCAL_ERROR_OFFSET 1000000 struct sockaddr_rxrpc srx; /* remote address */ /* calculated RTT cache */ #define RXRPC_RTT_CACHE_SIZE 32 suseconds_t rtt; /* current RTT estimate (in uS) */ unsigned int rtt_point; /* next entry at which to insert */ unsigned int rtt_usage; /* amount of cache actually used */ suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ }; /* * Keys for matching a connection. */ struct rxrpc_conn_proto { union { struct { u32 epoch; /* epoch of this connection */ u32 cid; /* connection ID */ }; u64 index_key; }; }; struct rxrpc_conn_parameters { struct rxrpc_local *local; /* Representation of local endpoint */ struct rxrpc_peer *peer; /* Remote endpoint */ struct key *key; /* Security details */ bool exclusive; /* T if conn is exclusive */ u16 service_id; /* Service ID for this connection */ u32 security_level; /* Security level selected */ }; /* * Bits in the connection flags. */ 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 */ }; /* * Events that can be raised upon a connection. */ enum rxrpc_conn_event { RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ }; /* * 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 { RXRPC_CONN_UNUSED, /* Connection not yet attempted */ RXRPC_CONN_CLIENT, /* Client connection */ RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ RXRPC_CONN_SERVICE, /* Service secured connection */ RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ RXRPC_CONN__NR_STATES }; /* * RxRPC connection definition * - matched by { local, peer, epoch, conn_id, direction } * - each connection can only handle four simultaneous calls */ struct rxrpc_connection { struct rxrpc_conn_proto proto; struct rxrpc_conn_parameters params; 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 */ u32 call_counter; /* Call ID counter */ u32 last_call; /* ID of last call */ u8 last_type; /* Type of last packet */ u16 last_service_id; union { u32 last_seq; u32 last_abort; }; } channels[RXRPC_MAXCALLS]; 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 */ struct key *server_key; /* security for this service */ struct crypto_skcipher *cipher; /* encryption handle */ struct rxrpc_crypt csum_iv; /* packet checksum base */ unsigned long flags; unsigned long events; unsigned long idle_timestamp; /* Time at which last became idle */ spinlock_t state_lock; /* state-change lock */ enum rxrpc_conn_cache_state cache_state; enum rxrpc_conn_proto_state state; /* current state of connection */ u32 local_abort; /* local abort code */ u32 remote_abort; /* remote abort code */ int debug_id; /* debug ID for printks */ atomic_t serial; /* packet serial number counter */ unsigned int hi_serial; /* highest serial number received */ u8 size_align; /* data size alignment (for security) */ u8 header_size; /* rxrpc + security header size */ u8 security_size; /* security header size */ u32 security_nonce; /* response re-use preventer */ u8 security_ix; /* security type */ u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ }; /* * Flags in call->flags. */ enum rxrpc_call_flag { RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ RXRPC_CALL_RCVD_LAST, /* all packets received */ RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ 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 */ RXRPC_CALL_RX_NO_MORE, /* Don't indicate MSG_MORE from recvmsg() */ }; /* * Events that can be raised on a call. */ enum rxrpc_call_event { RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ RXRPC_CALL_EV_ACK, /* need to generate ACK */ RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ RXRPC_CALL_EV_ABORT, /* need to generate abort */ RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ RXRPC_CALL_EV_RESEND, /* Tx resend required */ RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ }; /* * The states that a call can be in. */ enum rxrpc_call_state { RXRPC_CALL_UNINITIALISED, RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ RXRPC_CALL_COMPLETE, /* - call complete */ NR__RXRPC_CALL_STATES }; /* * Call completion condition (state == RXRPC_CALL_COMPLETE). */ enum rxrpc_call_completion { RXRPC_CALL_SUCCEEDED, /* - Normal termination */ RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ NR__RXRPC_CALL_COMPLETIONS }; /* * RxRPC call definition * - matched by { connection, call_id } */ struct rxrpc_call { struct rcu_head rcu; struct rxrpc_connection *conn; /* connection carrying call */ struct rxrpc_peer *peer; /* Peer record for remote address */ struct rxrpc_sock __rcu *socket; /* socket responsible */ struct timer_list lifetimer; /* lifetime remaining on call */ struct timer_list ack_timer; /* ACK generation timer */ struct timer_list resend_timer; /* Tx resend timer */ struct work_struct processor; /* packet processor and ACK generator */ rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ 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_head knlrecv_queue; /* Queue for kernel_recv [TODO: replace this] */ struct sk_buff *tx_pending; /* Tx socket buffer being filled */ 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 */ unsigned long flags; unsigned long events; spinlock_t lock; rwlock_t state_lock; /* lock for state transition */ u32 abort_code; /* Local/remote abort code */ int error; /* Local error incurred */ enum rxrpc_call_state state; /* current state of call */ enum rxrpc_call_completion completion; /* Call completion condition */ atomic_t usage; atomic_t skb_count; /* Outstanding packets on this call */ atomic_t sequence; /* Tx data packet sequence counter */ u16 service_id; /* service ID */ u8 security_ix; /* Security type */ u32 call_id; /* call ID on connection */ u32 cid; /* connection ID plus channel index */ int debug_id; /* debug ID for printks */ /* transmission-phase ACK management */ u8 acks_head; /* offset into window of first entry */ u8 acks_tail; /* offset into window of last entry */ u8 acks_winsz; /* size of un-ACK'd window */ u8 acks_unacked; /* lowest unacked packet in last ACK received */ int acks_latest; /* serial number of latest ACK received */ rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ unsigned long *acks_window; /* sent packet window * - elements are pointers with LSB set if ACK'd */ /* receive-phase ACK management */ rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ u8 ackr_reason; /* reason to ACK */ u16 ackr_skew; /* skew on packet being ACK'd */ rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ atomic_t ackr_not_idle; /* number of packets in Rx queue */ /* received packet records, 1 bit per record */ #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; }; enum rxrpc_call_trace { rxrpc_call_new_client, rxrpc_call_new_service, rxrpc_call_queued, rxrpc_call_queued_ref, rxrpc_call_seen, rxrpc_call_got, rxrpc_call_got_skb, rxrpc_call_got_userid, rxrpc_call_put, rxrpc_call_put_skb, rxrpc_call_put_userid, rxrpc_call_put_noqueue, rxrpc_call__nr_trace }; extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4]; #include /* * af_rxrpc.c */ extern atomic_t rxrpc_n_skbs; extern u32 rxrpc_epoch; extern atomic_t rxrpc_debug_id; extern struct workqueue_struct *rxrpc_workqueue; /* * call_accept.c */ void rxrpc_accept_incoming_calls(struct rxrpc_local *); struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, rxrpc_notify_rx_t); int rxrpc_reject_call(struct rxrpc_sock *); /* * call_event.c */ void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool); void rxrpc_process_call(struct work_struct *); /* * call_object.c */ extern const char *const rxrpc_call_states[]; extern const char *const rxrpc_call_completions[]; extern unsigned int rxrpc_max_call_lifetime; extern struct kmem_cache *rxrpc_call_jar; extern struct list_head rxrpc_calls; extern rwlock_t rxrpc_call_lock; struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, unsigned long, gfp_t); struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_connection *, struct sk_buff *); void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); void rxrpc_release_calls_on_socket(struct rxrpc_sock *); bool __rxrpc_queue_call(struct rxrpc_call *); bool rxrpc_queue_call(struct rxrpc_call *); void rxrpc_see_call(struct rxrpc_call *); void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); void rxrpc_get_call_for_skb(struct rxrpc_call *, struct sk_buff *); void rxrpc_put_call_for_skb(struct rxrpc_call *, struct sk_buff *); void __exit rxrpc_destroy_all_calls(void); static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) { return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); } static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) { return !rxrpc_is_service_call(call); } /* * Transition a call to the complete state. */ static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, enum rxrpc_call_completion compl, u32 abort_code, int error) { if (call->state < RXRPC_CALL_COMPLETE) { call->abort_code = abort_code; call->error = error; call->completion = compl, call->state = RXRPC_CALL_COMPLETE; return true; } return false; } static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, enum rxrpc_call_completion compl, u32 abort_code, int error) { bool ret; write_lock_bh(&call->state_lock); ret = __rxrpc_set_call_completion(call, compl, abort_code, error); write_unlock_bh(&call->state_lock); return ret; } /* * Record that a call successfully completed. */ static inline bool __rxrpc_call_completed(struct rxrpc_call *call) { return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); } static inline bool rxrpc_call_completed(struct rxrpc_call *call) { bool ret; write_lock_bh(&call->state_lock); ret = __rxrpc_call_completed(call); write_unlock_bh(&call->state_lock); return ret; } /* * Record that a call is locally aborted. */ static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, rxrpc_seq_t seq, u32 abort_code, int error) { trace_rxrpc_abort(why, call->cid, call->call_id, seq, abort_code, error); if (__rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, abort_code, error)) { set_bit(RXRPC_CALL_EV_ABORT, &call->events); return true; } return false; } static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, rxrpc_seq_t seq, u32 abort_code, int error) { bool ret; write_lock_bh(&call->state_lock); ret = __rxrpc_abort_call(why, call, seq, abort_code, error); write_unlock_bh(&call->state_lock); return ret; } /* * 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_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 */ void rxrpc_process_connection(struct work_struct *); void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); void rxrpc_reject_packets(struct rxrpc_local *); /* * conn_object.c */ 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_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); static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) { return conn->out_clientflag; } static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) { return !rxrpc_conn_is_client(conn); } static inline void rxrpc_get_connection(struct rxrpc_connection *conn) { atomic_inc(&conn->usage); } static inline struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) { return atomic_inc_not_zero(&conn->usage) ? conn : NULL; } static inline void rxrpc_put_connection(struct rxrpc_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); } } static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) { if (!rxrpc_get_connection_maybe(conn)) return false; if (!rxrpc_queue_work(&conn->processor)) rxrpc_put_connection(conn); return true; } /* * conn_service.c */ struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, struct sk_buff *); struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, struct sockaddr_rxrpc *, struct sk_buff *); void rxrpc_unpublish_service_conn(struct rxrpc_connection *); /* * input.c */ void rxrpc_data_ready(struct sock *); int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); /* * insecure.c */ extern const struct rxrpc_security rxrpc_no_security; /* * key.c */ extern struct key_type key_type_rxrpc; extern struct key_type key_type_rxrpc_s; int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, u32); /* * local_event.c */ extern void rxrpc_process_local_events(struct rxrpc_local *); /* * local_object.c */ struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); void __rxrpc_put_local(struct rxrpc_local *); void __exit rxrpc_destroy_all_locals(void); static inline void rxrpc_get_local(struct rxrpc_local *local) { atomic_inc(&local->usage); } static inline struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) { return atomic_inc_not_zero(&local->usage) ? local : NULL; } static inline void rxrpc_put_local(struct rxrpc_local *local) { if (local && atomic_dec_and_test(&local->usage)) __rxrpc_put_local(local); } static inline void rxrpc_queue_local(struct rxrpc_local *local) { rxrpc_queue_work(&local->processor); } /* * misc.c */ extern unsigned int rxrpc_max_backlog __read_mostly; extern unsigned int rxrpc_requested_ack_delay; extern unsigned int rxrpc_soft_ack_delay; extern unsigned int rxrpc_idle_ack_delay; extern unsigned int rxrpc_rx_window_size; extern unsigned int rxrpc_rx_mtu; extern unsigned int rxrpc_rx_jumbo_max; extern unsigned int rxrpc_resend_timeout; extern const char *const rxrpc_pkts[]; extern const s8 rxrpc_ack_priority[]; extern const char *rxrpc_acks(u8 reason); /* * output.c */ int rxrpc_send_call_packet(struct rxrpc_call *, u8); int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); /* * peer_event.c */ void rxrpc_error_report(struct sock *); void rxrpc_peer_error_distributor(struct work_struct *); /* * peer_object.c */ struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, const struct sockaddr_rxrpc *); struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, struct sockaddr_rxrpc *, gfp_t); struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) { atomic_inc(&peer->usage); return peer; } static inline struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) { return atomic_inc_not_zero(&peer->usage) ? peer : NULL; } extern void __rxrpc_put_peer(struct rxrpc_peer *peer); static inline void rxrpc_put_peer(struct rxrpc_peer *peer) { if (peer && atomic_dec_and_test(&peer->usage)) __rxrpc_put_peer(peer); } /* * proc.c */ extern const struct file_operations rxrpc_call_seq_fops; extern const struct file_operations rxrpc_connection_seq_fops; /* * recvmsg.c */ int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); /* * rxkad.c */ #ifdef CONFIG_RXKAD extern const struct rxrpc_security rxkad; #endif /* * security.c */ int __init rxrpc_init_security(void); void rxrpc_exit_security(void); int rxrpc_init_client_conn_security(struct rxrpc_connection *); int rxrpc_init_server_conn_security(struct rxrpc_connection *); /* * sendmsg.c */ int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); /* * skbuff.c */ void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); void rxrpc_packet_destructor(struct sk_buff *); void rxrpc_new_skb(struct sk_buff *); void rxrpc_see_skb(struct sk_buff *); void rxrpc_get_skb(struct sk_buff *); void rxrpc_free_skb(struct sk_buff *); void rxrpc_purge_queue(struct sk_buff_head *); /* * sysctl.c */ #ifdef CONFIG_SYSCTL extern int __init rxrpc_sysctl_init(void); extern void rxrpc_sysctl_exit(void); #else static inline int __init rxrpc_sysctl_init(void) { return 0; } static inline void rxrpc_sysctl_exit(void) {} #endif /* * utils.c */ int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); /* * debug tracing */ extern unsigned int rxrpc_debug; #define dbgprintk(FMT,...) \ printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) #if defined(__KDEBUG) #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) #define _net(FMT,...) knet(FMT,##__VA_ARGS__) #elif defined(CONFIG_AF_RXRPC_DEBUG) #define RXRPC_DEBUG_KENTER 0x01 #define RXRPC_DEBUG_KLEAVE 0x02 #define RXRPC_DEBUG_KDEBUG 0x04 #define RXRPC_DEBUG_KPROTO 0x08 #define RXRPC_DEBUG_KNET 0x10 #define _enter(FMT,...) \ do { \ if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ kenter(FMT,##__VA_ARGS__); \ } while (0) #define _leave(FMT,...) \ do { \ if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ kleave(FMT,##__VA_ARGS__); \ } while (0) #define _debug(FMT,...) \ do { \ if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ kdebug(FMT,##__VA_ARGS__); \ } while (0) #define _proto(FMT,...) \ do { \ if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ kproto(FMT,##__VA_ARGS__); \ } while (0) #define _net(FMT,...) \ do { \ if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ knet(FMT,##__VA_ARGS__); \ } while (0) #else #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) #endif /* * debug assertion checking */ #if 1 // defined(__KDEBUGALL) #define ASSERT(X) \ do { \ if (unlikely(!(X))) { \ pr_err("Assertion failed\n"); \ BUG(); \ } \ } while (0) #define ASSERTCMP(X, OP, Y) \ do { \ __typeof__(X) _x = (X); \ __typeof__(Y) _y = (__typeof__(X))(Y); \ if (unlikely(!(_x OP _y))) { \ pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ (unsigned long)_x, (unsigned long)_x, #OP, \ (unsigned long)_y, (unsigned long)_y); \ BUG(); \ } \ } while (0) #define ASSERTIF(C, X) \ do { \ if (unlikely((C) && !(X))) { \ pr_err("Assertion failed\n"); \ BUG(); \ } \ } while (0) #define ASSERTIFCMP(C, X, OP, Y) \ do { \ __typeof__(X) _x = (X); \ __typeof__(Y) _y = (__typeof__(X))(Y); \ if (unlikely((C) && !(_x OP _y))) { \ pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ (unsigned long)_x, (unsigned long)_x, #OP, \ (unsigned long)_y, (unsigned long)_y); \ BUG(); \ } \ } while (0) #else #define ASSERT(X) \ do { \ } while (0) #define ASSERTCMP(X, OP, Y) \ do { \ } while (0) #define ASSERTIF(C, X) \ do { \ } while (0) #define ASSERTIFCMP(C, X, OP, Y) \ do { \ } while (0) #endif /* __KDEBUGALL */