| /* 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 <rxrpc/packet.h> |
| |
| #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 */ |
| __be16 service_id; /* service ID of local/remote service */ |
| }; |
| |
| #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) |
| |
| /* |
| * 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 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_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 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 */ |
| 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 if_mtu; /* interface MTU for this peer */ |
| unsigned mtu; /* network MTU for this peer */ |
| unsigned 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 rtt_point; /* next entry at which to insert */ |
| unsigned 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 */ |
| time_t 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 */ |
| __be16 service_id; /* service ID */ |
| 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_blkcipher *cipher; /* encryption handle */ |
| struct rxrpc_crypt csum_iv; /* packet checksum base */ |
| unsigned long events; |
| #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ |
| time_t put_time; /* time at which to reap */ |
| rwlock_t lock; /* access lock */ |
| spinlock_t state_lock; /* state-change lock */ |
| atomic_t usage; |
| u32 real_conn_id; /* connection ID (host-endian) */ |
| 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; |
| int error; /* error code for local abort */ |
| int debug_id; /* debug ID for printks */ |
| unsigned 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 */ |
| |
| /* the following are all in net order */ |
| __be32 epoch; /* epoch of this connection */ |
| __be32 cid; /* connection ID */ |
| __be16 service_id; /* service ID */ |
| 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 */ |
| }; |
| |
| /* |
| * 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; |
| #define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */ |
| #define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */ |
| #define RXRPC_CALL_RCVD_LAST 2 /* all packets received */ |
| #define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */ |
| #define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */ |
| #define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */ |
| #define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */ |
| #define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */ |
| #define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */ |
| unsigned long events; |
| #define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */ |
| #define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */ |
| #define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */ |
| #define RXRPC_CALL_RCVD_ERROR 3 /* network error received */ |
| #define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */ |
| #define RXRPC_CALL_ACK 5 /* need to generate ACK */ |
| #define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */ |
| #define RXRPC_CALL_ABORT 7 /* need to generate abort */ |
| #define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */ |
| #define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */ |
| #define RXRPC_CALL_RESEND 10 /* Tx resend required */ |
| #define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */ |
| #define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */ |
| #define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */ |
| #define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */ |
| #define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */ |
| #define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */ |
| |
| spinlock_t lock; |
| rwlock_t state_lock; /* lock for state transition */ |
| atomic_t usage; |
| atomic_t sequence; /* Tx data packet sequence counter */ |
| u32 abort_code; /* local/remote abort code */ |
| enum { /* current state of call */ |
| 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 */ |
| } state; |
| 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_net_t ackr_prev_seq; /* previous sequence number received */ |
| u8 ackr_reason; /* reason to ACK */ |
| __be32 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]; |
| |
| /* the following should all be in net order */ |
| __be32 cid; /* connection ID + channel index */ |
| __be32 call_id; /* call ID on connection */ |
| }; |
| |
| /* |
| * 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->abort_code = abort_code; |
| call->state = RXRPC_CALL_LOCALLY_ABORTED; |
| set_bit(RXRPC_CALL_ABORT, &call->events); |
| } |
| write_unlock_bh(&call->state_lock); |
| } |
| |
| /* |
| * af_rxrpc.c |
| */ |
| extern atomic_t rxrpc_n_skbs; |
| extern __be32 rxrpc_epoch; |
| extern atomic_t rxrpc_debug_id; |
| extern struct workqueue_struct *rxrpc_workqueue; |
| |
| /* |
| * ar-accept.c |
| */ |
| extern void rxrpc_accept_incoming_calls(struct work_struct *); |
| extern struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, |
| unsigned long); |
| extern int rxrpc_reject_call(struct rxrpc_sock *); |
| |
| /* |
| * ar-ack.c |
| */ |
| extern void __rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); |
| extern void rxrpc_propose_ACK(struct rxrpc_call *, u8, __be32, bool); |
| extern void rxrpc_process_call(struct work_struct *); |
| |
| /* |
| * ar-call.c |
| */ |
| extern struct kmem_cache *rxrpc_call_jar; |
| extern struct list_head rxrpc_calls; |
| extern rwlock_t rxrpc_call_lock; |
| |
| extern struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *, |
| struct rxrpc_transport *, |
| struct rxrpc_conn_bundle *, |
| unsigned long, int, gfp_t); |
| extern struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, |
| struct rxrpc_connection *, |
| struct rxrpc_header *, gfp_t); |
| extern struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *, |
| unsigned long); |
| extern void rxrpc_release_call(struct rxrpc_call *); |
| extern void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
| extern void __rxrpc_put_call(struct rxrpc_call *); |
| extern void __exit rxrpc_destroy_all_calls(void); |
| |
| /* |
| * ar-connection.c |
| */ |
| extern struct list_head rxrpc_connections; |
| extern rwlock_t rxrpc_connection_lock; |
| |
| extern struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *, |
| struct rxrpc_transport *, |
| struct key *, |
| __be16, gfp_t); |
| extern void rxrpc_put_bundle(struct rxrpc_transport *, |
| struct rxrpc_conn_bundle *); |
| extern int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *, |
| struct rxrpc_conn_bundle *, struct rxrpc_call *, |
| gfp_t); |
| extern void rxrpc_put_connection(struct rxrpc_connection *); |
| extern void __exit rxrpc_destroy_all_connections(void); |
| extern struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *, |
| struct rxrpc_header *); |
| extern struct rxrpc_connection * |
| rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *, |
| gfp_t); |
| |
| /* |
| * ar-connevent.c |
| */ |
| extern void rxrpc_process_connection(struct work_struct *); |
| extern void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); |
| extern void rxrpc_reject_packets(struct work_struct *); |
| |
| /* |
| * ar-error.c |
| */ |
| extern void rxrpc_UDP_error_report(struct sock *); |
| extern void rxrpc_UDP_error_handler(struct work_struct *); |
| |
| /* |
| * ar-input.c |
| */ |
| extern unsigned long rxrpc_ack_timeout; |
| extern const char *rxrpc_pkts[]; |
| |
| extern void rxrpc_data_ready(struct sock *, int); |
| extern int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, |
| bool); |
| extern void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); |
| |
| /* |
| * ar-local.c |
| */ |
| extern rwlock_t rxrpc_local_lock; |
| extern struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *); |
| extern void rxrpc_put_local(struct rxrpc_local *); |
| extern 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; |
| |
| extern int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); |
| extern int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); |
| extern int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, |
| time_t, u32); |
| |
| /* |
| * ar-output.c |
| */ |
| extern int rxrpc_resend_timeout; |
| |
| extern int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *); |
| extern int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *, |
| struct rxrpc_transport *, struct msghdr *, |
| size_t); |
| extern int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *, |
| struct msghdr *, size_t); |
| |
| /* |
| * ar-peer.c |
| */ |
| extern struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t); |
| extern void rxrpc_put_peer(struct rxrpc_peer *); |
| extern struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *, |
| __be32, __be16); |
| extern 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 |
| */ |
| extern void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); |
| extern int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *, |
| size_t, int); |
| |
| /* |
| * ar-security.c |
| */ |
| extern int rxrpc_register_security(struct rxrpc_security *); |
| extern void rxrpc_unregister_security(struct rxrpc_security *); |
| extern int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
| extern int rxrpc_init_server_conn_security(struct rxrpc_connection *); |
| extern int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *, |
| size_t, void *); |
| extern int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *, |
| u32 *); |
| extern void rxrpc_clear_conn_security(struct rxrpc_connection *); |
| |
| /* |
| * ar-skbuff.c |
| */ |
| extern void rxrpc_packet_destructor(struct sk_buff *); |
| |
| /* |
| * ar-transport.c |
| */ |
| extern struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *, |
| struct rxrpc_peer *, |
| gfp_t); |
| extern void rxrpc_put_transport(struct rxrpc_transport *); |
| extern void __exit rxrpc_destroy_all_transports(void); |
| extern struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *, |
| struct rxrpc_peer *); |
| |
| /* |
| * debug tracing |
| */ |
| extern unsigned 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) |
