/* 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 #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)) #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) #define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->processor) /* * sk_state for RxRPC sockets */ enum { RXRPC_UNCONNECTED = 0, RXRPC_CLIENT_BOUND, /* client local address bound */ RXRPC_CLIENT_CONNECTED, /* client is connected */ 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_interceptor_t interceptor; /* kernel service Rx interceptor function */ struct rxrpc_local *local; /* local endpoint */ struct rxrpc_transport *trans; /* transport handler */ struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */ struct rxrpc_connection *conn; /* exclusive virtual connection */ struct list_head 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_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */ rwlock_t call_lock; /* lock for calls */ u32 min_sec_level; /* minimum security level */ #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT struct sockaddr_rxrpc srx; /* local address */ sa_family_t proto; /* protocol created with */ }; #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) enum rxrpc_command { RXRPC_CMD_SEND_DATA, /* send data message */ RXRPC_CMD_SEND_ABORT, /* request abort generation */ RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ }; /* * RxRPC security module interface */ struct rxrpc_security { struct module *owner; /* providing module */ struct list_head link; /* link in master list */ const char *name; /* name of this service */ u8 security_index; /* security type provided */ /* initialise a connection's security */ int (*init_connection_security)(struct rxrpc_connection *); /* prime a connection's packet security */ void (*prime_packet_security)(struct rxrpc_connection *); /* impose security on a packet */ int (*secure_packet)(const struct rxrpc_call *, struct sk_buff *, size_t, void *); /* verify the security on a received packet */ int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *, u32 *); /* 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 definition * - matched by local port, address and protocol type */ struct rxrpc_local { struct socket *socket; /* my UDP socket */ struct work_struct destroyer; /* endpoint destroyer */ struct work_struct acceptor; /* incoming call processor */ struct work_struct rejecter; /* packet reject writer */ struct work_struct event_processor; /* endpoint event processor */ struct list_head services; /* services listening on this endpoint */ struct list_head link; /* link in endpoint list */ 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 */ spinlock_t lock; /* access lock */ rwlock_t services_lock; /* lock for services list */ atomic_t usage; int debug_id; /* debug ID for printks */ volatile char error_rcvd; /* T if received ICMP error outstanding */ struct sockaddr_rxrpc srx; /* local address */ }; /* * RxRPC remote transport endpoint definition * - matched by remote port, address and protocol type * - holds the connection ID counter for connections between the two endpoints */ struct rxrpc_peer { struct work_struct destroyer; /* peer destroyer */ struct list_head link; /* link in master peer list */ struct list_head error_targets; /* targets for net error distribution */ spinlock_t lock; /* access lock */ atomic_t usage; 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 net_error; /* network error distributed */ 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 */ }; /* * RxRPC point-to-point transport / connection manager definition * - handles a bundle of connections between two endpoints * - matched by { local, peer } */ struct rxrpc_transport { struct rxrpc_local *local; /* local transport endpoint */ struct rxrpc_peer *peer; /* remote transport endpoint */ struct work_struct error_handler; /* network error distributor */ struct rb_root bundles; /* client connection bundles on this transport */ struct rb_root client_conns; /* client connections on this transport */ struct rb_root server_conns; /* server connections on this transport */ struct list_head link; /* link in master session list */ struct sk_buff_head error_queue; /* error packets awaiting processing */ unsigned long put_time; /* time at which to reap */ spinlock_t client_lock; /* client connection allocation lock */ rwlock_t conn_lock; /* lock for active/dead connections */ atomic_t usage; int debug_id; /* debug ID for printks */ unsigned int conn_idcounter; /* connection ID counter (client) */ }; /* * RxRPC client connection bundle * - matched by { transport, service_id, key } */ struct rxrpc_conn_bundle { struct rb_node node; /* node in transport's lookup tree */ struct list_head unused_conns; /* unused connections in this bundle */ struct list_head avail_conns; /* available connections in this bundle */ struct list_head busy_conns; /* busy connections in this bundle */ struct key *key; /* security for this bundle */ wait_queue_head_t chanwait; /* wait for channel to become available */ atomic_t usage; int debug_id; /* debug ID for printks */ unsigned short num_conns; /* number of connections in this bundle */ u16 service_id; /* Service ID for this bundle */ u8 security_ix; /* security type */ }; /* * RxRPC connection definition * - matched by { transport, service_id, conn_id, direction, key } * - each connection can only handle four simultaneous calls */ struct rxrpc_connection { struct rxrpc_transport *trans; /* transport session */ struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */ struct work_struct processor; /* connection event processor */ struct rb_node node; /* node in transport's lookup tree */ struct list_head link; /* link in master connection list */ struct list_head bundle_link; /* link in bundle */ struct rb_root calls; /* calls on this connection */ struct sk_buff_head rx_queue; /* received conn-level packets */ struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */ struct rxrpc_security *security; /* applied security module */ struct key *key; /* security for this connection (client) */ struct key *server_key; /* security for this service */ struct crypto_skcipher *cipher; /* encryption handle */ struct rxrpc_crypt csum_iv; /* packet checksum base */ unsigned long events; #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ unsigned long put_time; /* time at which to reap */ rwlock_t lock; /* access lock */ spinlock_t state_lock; /* state-change lock */ atomic_t usage; enum { /* current state of connection */ RXRPC_CONN_UNUSED, /* - connection not yet attempted */ RXRPC_CONN_CLIENT, /* - client connection */ RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ RXRPC_CONN_SERVER, /* - server secured connection */ RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ } state; u32 local_abort; /* local abort code */ u32 remote_abort; /* remote abort code */ int error; /* local error incurred */ int debug_id; /* debug ID for printks */ unsigned int call_counter; /* call ID counter */ atomic_t serial; /* packet serial number counter */ atomic_t hi_serial; /* highest serial number received */ u8 avail_calls; /* number of calls available */ u8 size_align; /* data size alignment (for security) */ u8 header_size; /* rxrpc + security header size */ u8 security_size; /* security header size */ u32 security_level; /* security level negotiated */ u32 security_nonce; /* response re-use preventer */ u32 epoch; /* epoch of this connection */ u32 cid; /* connection ID */ u16 service_id; /* service ID for this connection */ u8 security_ix; /* security type */ u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ 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_PROC_BUSY, /* the processor is busy */ 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 */ }; /* * 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 */ RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ }; /* * The states that a call can be in. */ enum rxrpc_call_state { 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 completed */ 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_NETWORK_ERROR, /* - call terminated by network error */ RXRPC_CALL_DEAD, /* - call is dead */ NR__RXRPC_CALL_STATES }; /* * RxRPC call definition * - matched by { connection, call_id } */ struct rxrpc_call { struct rxrpc_connection *conn; /* connection carrying call */ struct rxrpc_sock *socket; /* socket responsible */ struct timer_list lifetimer; /* lifetime remaining on call */ struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ struct timer_list ack_timer; /* ACK generation timer */ struct timer_list resend_timer; /* Tx resend timer */ 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 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 rb_node conn_node; /* node in connection 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 */ 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 */ atomic_t usage; atomic_t sequence; /* Tx data packet sequence counter */ u32 local_abort; /* local abort code */ u32 remote_abort; /* remote abort code */ int error; /* local error incurred */ enum rxrpc_call_state state : 8; /* current state of call */ int debug_id; /* debug ID for printks */ u8 channel; /* connection channel occupied by this call */ /* 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 */ 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]; struct hlist_node hash_node; unsigned long hash_key; /* Full hash key */ u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */ struct rxrpc_local *local; /* Local endpoint. Used for hashing. */ sa_family_t proto; /* Frame protocol */ u32 call_id; /* call ID on connection */ u32 cid; /* connection ID plus channel index */ u32 epoch; /* epoch of this connection */ u16 service_id; /* service ID */ union { /* Peer IP address for hashing */ __be32 ipv4_addr; __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */ } peer_ip; }; /* * locally abort an RxRPC call */ static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) { write_lock_bh(&call->state_lock); if (call->state < RXRPC_CALL_COMPLETE) { call->local_abort = abort_code; call->state = RXRPC_CALL_LOCALLY_ABORTED; set_bit(RXRPC_CALL_EV_ABORT, &call->events); } write_unlock_bh(&call->state_lock); } /* * 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; /* * ar-accept.c */ void rxrpc_accept_incoming_calls(struct work_struct *); struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); int rxrpc_reject_call(struct rxrpc_sock *); /* * ar-ack.c */ void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); void rxrpc_process_call(struct work_struct *); /* * ar-call.c */ extern unsigned int rxrpc_max_call_lifetime; extern unsigned int rxrpc_dead_call_expiry; 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_hash(struct rxrpc_host_header *, void *, sa_family_t, const void *); struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, struct rxrpc_transport *, struct rxrpc_conn_bundle *, unsigned long, int, gfp_t); struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_connection *, struct rxrpc_host_header *, gfp_t); struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, unsigned long); void rxrpc_release_call(struct rxrpc_call *); void rxrpc_release_calls_on_socket(struct rxrpc_sock *); void __rxrpc_put_call(struct rxrpc_call *); void __exit rxrpc_destroy_all_calls(void); /* * ar-connection.c */ extern unsigned int rxrpc_connection_expiry; extern struct list_head rxrpc_connections; extern rwlock_t rxrpc_connection_lock; struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, struct rxrpc_transport *, struct key *, u16, gfp_t); void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *); int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, struct rxrpc_conn_bundle *, struct rxrpc_call *, gfp_t); void rxrpc_put_connection(struct rxrpc_connection *); void __exit rxrpc_destroy_all_connections(void); struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, struct rxrpc_host_header *); extern struct rxrpc_connection * rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_host_header *, gfp_t); /* * ar-connevent.c */ void rxrpc_process_connection(struct work_struct *); void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); void rxrpc_reject_packets(struct work_struct *); /* * ar-error.c */ void rxrpc_UDP_error_report(struct sock *); void rxrpc_UDP_error_handler(struct work_struct *); /* * ar-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 *); /* * ar-local.c */ extern rwlock_t rxrpc_local_lock; struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); void rxrpc_put_local(struct rxrpc_local *); void __exit rxrpc_destroy_all_locals(void); /* * ar-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); /* * ar-output.c */ extern unsigned int rxrpc_resend_timeout; int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); int rxrpc_client_sendmsg(struct rxrpc_sock *, struct rxrpc_transport *, struct msghdr *, size_t); int rxrpc_server_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); /* * ar-peer.c */ struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); void rxrpc_put_peer(struct rxrpc_peer *); struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, __be32, __be16); void __exit rxrpc_destroy_all_peers(void); /* * ar-proc.c */ extern const char *const rxrpc_call_states[]; extern const struct file_operations rxrpc_call_seq_fops; extern const struct file_operations rxrpc_connection_seq_fops; /* * ar-recvmsg.c */ void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); /* * ar-security.c */ int rxrpc_register_security(struct rxrpc_security *); void rxrpc_unregister_security(struct rxrpc_security *); int rxrpc_init_client_conn_security(struct rxrpc_connection *); int rxrpc_init_server_conn_security(struct rxrpc_connection *); int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, size_t, void *); int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, u32 *); void rxrpc_clear_conn_security(struct rxrpc_connection *); /* * ar-skbuff.c */ void rxrpc_packet_destructor(struct sk_buff *); /* * ar-transport.c */ extern unsigned int rxrpc_transport_expiry; struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, struct rxrpc_peer *, gfp_t); void rxrpc_put_transport(struct rxrpc_transport *); void __exit rxrpc_destroy_all_transports(void); struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, struct rxrpc_peer *); /* * misc.c */ 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 const char *const rxrpc_pkts[]; extern const s8 rxrpc_ack_priority[]; extern const char *rxrpc_acks(u8 reason); /* * 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 /* * 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))) { \ printk(KERN_ERR "\n"); \ printk(KERN_ERR "RxRPC: Assertion failed\n"); \ BUG(); \ } \ } while (0) #define ASSERTCMP(X, OP, Y) \ do { \ if (unlikely(!((X) OP (Y)))) { \ printk(KERN_ERR "\n"); \ printk(KERN_ERR "RxRPC: Assertion failed\n"); \ printk(KERN_ERR "%lu " #OP " %lu is false\n", \ (unsigned long)(X), (unsigned long)(Y)); \ printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ (unsigned long)(X), (unsigned long)(Y)); \ BUG(); \ } \ } while (0) #define ASSERTIF(C, X) \ do { \ if (unlikely((C) && !(X))) { \ printk(KERN_ERR "\n"); \ printk(KERN_ERR "RxRPC: Assertion failed\n"); \ BUG(); \ } \ } while (0) #define ASSERTIFCMP(C, X, OP, Y) \ do { \ if (unlikely((C) && !((X) OP (Y)))) { \ printk(KERN_ERR "\n"); \ printk(KERN_ERR "RxRPC: Assertion failed\n"); \ printk(KERN_ERR "%lu " #OP " %lu is false\n", \ (unsigned long)(X), (unsigned long)(Y)); \ printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ (unsigned long)(X), (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 */ /* * socket buffer accounting / leak finding */ static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) { //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); //atomic_inc(&rxrpc_n_skbs); } #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) { //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); //atomic_dec(&rxrpc_n_skbs); } #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) { if (skb) { CHECK_SLAB_OKAY(&skb->users); //_net("free skb %p %s [%d]", // skb, fn, atomic_read(&rxrpc_n_skbs)); //atomic_dec(&rxrpc_n_skbs); kfree_skb(skb); } } #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) static inline void rxrpc_purge_queue(struct sk_buff_head *list) { struct sk_buff *skb; while ((skb = skb_dequeue((list))) != NULL) rxrpc_free_skb(skb); } static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f) { CHECK_SLAB_OKAY(&local->usage); if (atomic_inc_return(&local->usage) == 1) printk("resurrected (%s)\n", f); } #define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__) #define rxrpc_get_call(CALL) \ do { \ CHECK_SLAB_OKAY(&(CALL)->usage); \ if (atomic_inc_return(&(CALL)->usage) == 1) \ BUG(); \ } while (0) #define rxrpc_put_call(CALL) \ do { \ __rxrpc_put_call(CALL); \ } while (0)