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-rw-r--r--net/rxrpc/ar-internal.h842
1 files changed, 842 insertions, 0 deletions
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
new file mode 100644
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--- /dev/null
+++ b/net/rxrpc/ar-internal.h
@@ -0,0 +1,842 @@
+/* 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
+
+extern atomic_t rxrpc_n_skbs;
+
+#define FCRYPT_BSIZE 8
+struct rxrpc_crypt {
+ union {
+ u8 x[FCRYPT_BSIZE];
+ u32 n[2];
+ };
+} __attribute__((aligned(8)));
+
+extern __be32 rxrpc_epoch; /* local epoch for detecting local-end reset */
+extern atomic_t rxrpc_debug_id; /* current debugging ID */
+
+/*
+ * 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;
+ 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_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_NET_ERROR, /* network error message */
+ RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */
+ RXRPC_SKB_MARK_NEW_CALL, /* local error message */
+};
+
+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 */
+ uint8_t 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 */
+ uint8_t acks_head; /* offset into window of first entry */
+ uint8_t acks_tail; /* offset into window of last entry */
+ uint8_t acks_winsz; /* size of un-ACK'd window */
+ uint8_t 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 */
+ uint8_t 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 */
+};
+
+/*
+ * RxRPC key for Kerberos (type-2 security)
+ */
+struct rxkad_key {
+ u16 security_index; /* RxRPC header security index */
+ u16 ticket_len; /* length of ticket[] */
+ u32 expiry; /* time at which expires */
+ u32 kvno; /* key version number */
+ u8 session_key[8]; /* DES session key */
+ u8 ticket[0]; /* the encrypted ticket */
+};
+
+struct rxrpc_key_payload {
+ struct rxkad_key k;
+};
+
+/*
+ * 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);
+}
+
+/*
+ * put a packet up for transport-level abort
+ */
+static inline
+void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb)
+{
+ CHECK_SLAB_OKAY(&local->usage);
+ if (!atomic_inc_not_zero(&local->usage)) {
+ printk("resurrected on reject\n");
+ BUG();
+ }
+ skb_queue_tail(&local->reject_queue, skb);
+ schedule_work(&local->rejecter);
+}
+
+/*
+ * ar-accept.c
+ */
+extern void rxrpc_accept_incoming_calls(struct work_struct *);
+extern int rxrpc_accept_call(struct rxrpc_sock *, unsigned long);
+
+/*
+ * ar-ack.c
+ */
+extern void __rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __be32, bool);
+extern void rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __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_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 *rxrpc_call_states[];
+extern struct file_operations rxrpc_call_seq_fops;
+extern struct file_operations rxrpc_connection_seq_fops;
+
+/*
+ * ar-recvmsg.c
+ */
+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("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__)
+
+/* make sure we maintain the format strings, even when debugging is disabled */
+static inline __attribute__((format(printf,1,2)))
+void _dbprintk(const char *fmt, ...)
+{
+}
+
+#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__)
+#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__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,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__)
+#define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__)
+#define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__)
+#define _proto(FMT,...) _dbprintk("### "FMT ,##__VA_ARGS__)
+#define _net(FMT,...) _dbprintk("@@@ "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__atomic_inc(atomic_t *v)
+{
+ CHECK_SLAB_OKAY(v);
+ atomic_inc(v);
+}
+
+#define atomic_inc(v) __rxrpc__atomic_inc((v))
+
+static inline void __rxrpc__atomic_dec(atomic_t *v)
+{
+ CHECK_SLAB_OKAY(v);
+ atomic_dec(v);
+}
+
+#define atomic_dec(v) __rxrpc__atomic_dec((v))
+
+static inline int __rxrpc__atomic_dec_and_test(atomic_t *v)
+{
+ CHECK_SLAB_OKAY(v);
+ return atomic_dec_and_test(v);
+}
+
+#define atomic_dec_and_test(v) __rxrpc__atomic_dec_and_test((v))
+
+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)

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