1 /* AF_RXRPC internal definitions
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #include <linux/atomic.h>
13 #include <linux/seqlock.h>
15 #include <net/af_rxrpc.h>
16 #include <rxrpc/packet.h>
19 #define CHECK_SLAB_OKAY(X) \
20 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
21 (POISON_FREE << 8 | POISON_FREE))
23 #define CHECK_SLAB_OKAY(X) do {} while (0)
26 #define FCRYPT_BSIZE 8
32 } __attribute__((aligned(8)));
34 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
35 #define rxrpc_queue_delayed_work(WS,D) \
36 queue_delayed_work(rxrpc_workqueue, (WS), (D))
38 #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor)
40 struct rxrpc_connection;
43 * sk_state for RxRPC sockets
47 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
48 RXRPC_CLIENT_BOUND, /* client local address bound */
49 RXRPC_SERVER_BOUND, /* server local address bound */
50 RXRPC_SERVER_LISTENING, /* server listening for connections */
51 RXRPC_CLOSE, /* socket is being closed */
55 * RxRPC socket definition
58 /* WARNING: sk has to be the first member */
60 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */
61 struct rxrpc_local *local; /* local endpoint */
62 struct list_head listen_link; /* link in the local endpoint's listen list */
63 struct list_head secureq; /* calls awaiting connection security clearance */
64 struct list_head acceptq; /* calls awaiting acceptance */
65 struct key *key; /* security for this socket */
66 struct key *securities; /* list of server security descriptors */
67 struct rb_root calls; /* outstanding calls on this socket */
69 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
70 rwlock_t call_lock; /* lock for calls */
71 u32 min_sec_level; /* minimum security level */
72 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
73 bool exclusive; /* Exclusive connection for a client socket */
74 sa_family_t family; /* Protocol family created with */
75 struct sockaddr_rxrpc srx; /* local address */
76 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
79 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
82 * CPU-byteorder normalised Rx packet header.
84 struct rxrpc_host_header {
85 u32 epoch; /* client boot timestamp */
86 u32 cid; /* connection and channel ID */
87 u32 callNumber; /* call ID (0 for connection-level packets) */
88 u32 seq; /* sequence number of pkt in call stream */
89 u32 serial; /* serial number of pkt sent to network */
90 u8 type; /* packet type */
91 u8 flags; /* packet flags */
92 u8 userStatus; /* app-layer defined status */
93 u8 securityIndex; /* security protocol ID */
95 u16 _rsvd; /* reserved */
96 u16 cksum; /* kerberos security checksum */
98 u16 serviceId; /* service ID */
102 * RxRPC socket buffer private variables
103 * - max 48 bytes (struct sk_buff::cb)
105 struct rxrpc_skb_priv {
106 struct rxrpc_call *call; /* call with which associated */
107 unsigned long resend_at; /* time in jiffies at which to resend */
109 unsigned int offset; /* offset into buffer of next read */
110 int remain; /* amount of space remaining for next write */
111 u32 error; /* network error code */
112 bool need_resend; /* T if needs resending */
115 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
118 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
121 RXRPC_CMD_SEND_DATA, /* send data message */
122 RXRPC_CMD_SEND_ABORT, /* request abort generation */
123 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
124 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
128 * RxRPC security module interface
130 struct rxrpc_security {
131 const char *name; /* name of this service */
132 u8 security_index; /* security type provided */
134 /* Initialise a security service */
137 /* Clean up a security service */
140 /* initialise a connection's security */
141 int (*init_connection_security)(struct rxrpc_connection *);
143 /* prime a connection's packet security */
144 int (*prime_packet_security)(struct rxrpc_connection *);
146 /* impose security on a packet */
147 int (*secure_packet)(struct rxrpc_call *,
152 /* verify the security on a received packet */
153 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *);
155 /* issue a challenge */
156 int (*issue_challenge)(struct rxrpc_connection *);
158 /* respond to a challenge */
159 int (*respond_to_challenge)(struct rxrpc_connection *,
163 /* verify a response */
164 int (*verify_response)(struct rxrpc_connection *,
168 /* clear connection security */
169 void (*clear)(struct rxrpc_connection *);
173 * RxRPC local transport endpoint description
174 * - owned by a single AF_RXRPC socket
175 * - pointed to by transport socket struct sk_user_data
180 struct list_head link;
181 struct socket *socket; /* my UDP socket */
182 struct work_struct processor;
183 struct list_head services; /* services listening on this endpoint */
184 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
185 struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */
186 struct sk_buff_head reject_queue; /* packets awaiting rejection */
187 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
188 struct rb_root client_conns; /* Client connections by socket params */
189 spinlock_t client_conns_lock; /* Lock for client_conns */
190 spinlock_t lock; /* access lock */
191 rwlock_t services_lock; /* lock for services list */
192 int debug_id; /* debug ID for printks */
194 struct sockaddr_rxrpc srx; /* local address */
198 * RxRPC remote transport endpoint definition
199 * - matched by local endpoint, remote port, address and protocol type
202 struct rcu_head rcu; /* This must be first */
204 unsigned long hash_key;
205 struct hlist_node hash_link;
206 struct rxrpc_local *local;
207 struct hlist_head error_targets; /* targets for net error distribution */
208 struct work_struct error_distributor;
209 struct rb_root service_conns; /* Service connections */
210 seqlock_t service_conn_lock;
211 spinlock_t lock; /* access lock */
212 unsigned int if_mtu; /* interface MTU for this peer */
213 unsigned int mtu; /* network MTU for this peer */
214 unsigned int maxdata; /* data size (MTU - hdrsize) */
215 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
216 int debug_id; /* debug ID for printks */
217 int error_report; /* Net (+0) or local (+1000000) to distribute */
218 #define RXRPC_LOCAL_ERROR_OFFSET 1000000
219 struct sockaddr_rxrpc srx; /* remote address */
221 /* calculated RTT cache */
222 #define RXRPC_RTT_CACHE_SIZE 32
223 suseconds_t rtt; /* current RTT estimate (in uS) */
224 unsigned int rtt_point; /* next entry at which to insert */
225 unsigned int rtt_usage; /* amount of cache actually used */
226 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
230 * Keys for matching a connection.
232 struct rxrpc_conn_proto {
235 u32 epoch; /* epoch of this connection */
236 u32 cid; /* connection ID */
242 struct rxrpc_conn_parameters {
243 struct rxrpc_local *local; /* Representation of local endpoint */
244 struct rxrpc_peer *peer; /* Remote endpoint */
245 struct key *key; /* Security details */
246 bool exclusive; /* T if conn is exclusive */
247 u16 service_id; /* Service ID for this connection */
248 u32 security_level; /* Security level selected */
252 * Bits in the connection flags.
254 enum rxrpc_conn_flag {
255 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
256 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
257 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
261 * Events that can be raised upon a connection.
263 enum rxrpc_conn_event {
264 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
268 * The connection protocol state.
270 enum rxrpc_conn_proto_state {
271 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
272 RXRPC_CONN_CLIENT, /* Client connection */
273 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
274 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
275 RXRPC_CONN_SERVICE, /* Service secured connection */
276 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
277 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
278 RXRPC_CONN_NETWORK_ERROR, /* Conn terminated by network error */
279 RXRPC_CONN__NR_STATES
283 * RxRPC connection definition
284 * - matched by { local, peer, epoch, conn_id, direction }
285 * - each connection can only handle four simultaneous calls
287 struct rxrpc_connection {
288 struct rxrpc_conn_proto proto;
289 struct rxrpc_conn_parameters params;
291 spinlock_t channel_lock;
293 struct rxrpc_channel {
294 struct rxrpc_call __rcu *call; /* Active call */
295 u32 call_id; /* ID of current call */
296 u32 call_counter; /* Call ID counter */
297 u32 last_call; /* ID of last call */
298 u8 last_type; /* Type of last packet */
304 } channels[RXRPC_MAXCALLS];
305 wait_queue_head_t channel_wq; /* queue to wait for channel to become available */
308 struct work_struct processor; /* connection event processor */
310 struct rb_node client_node; /* Node in local->client_conns */
311 struct rb_node service_node; /* Node in peer->service_conns */
313 struct list_head proc_link; /* link in procfs list */
314 struct list_head link; /* link in master connection list */
315 struct sk_buff_head rx_queue; /* received conn-level packets */
316 const struct rxrpc_security *security; /* applied security module */
317 struct key *server_key; /* security for this service */
318 struct crypto_skcipher *cipher; /* encryption handle */
319 struct rxrpc_crypt csum_iv; /* packet checksum base */
321 unsigned long events;
322 unsigned long idle_timestamp; /* Time at which last became idle */
323 spinlock_t state_lock; /* state-change lock */
325 enum rxrpc_conn_proto_state state : 8; /* current state of connection */
326 u32 local_abort; /* local abort code */
327 u32 remote_abort; /* remote abort code */
328 int error; /* local error incurred */
329 int debug_id; /* debug ID for printks */
330 atomic_t serial; /* packet serial number counter */
331 unsigned int hi_serial; /* highest serial number received */
332 atomic_t avail_chans; /* number of channels available */
333 u8 size_align; /* data size alignment (for security) */
334 u8 header_size; /* rxrpc + security header size */
335 u8 security_size; /* security header size */
336 u32 security_nonce; /* response re-use preventer */
337 u8 security_ix; /* security type */
338 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
342 * Flags in call->flags.
344 enum rxrpc_call_flag {
345 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
346 RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */
347 RXRPC_CALL_RCVD_LAST, /* all packets received */
348 RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */
349 RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */
350 RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */
351 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
352 RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */
353 RXRPC_CALL_IS_SERVICE, /* Call is service call */
357 * Events that can be raised on a call.
359 enum rxrpc_call_event {
360 RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */
361 RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */
362 RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */
363 RXRPC_CALL_EV_RCVD_ERROR, /* network error received */
364 RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */
365 RXRPC_CALL_EV_ACK, /* need to generate ACK */
366 RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */
367 RXRPC_CALL_EV_ABORT, /* need to generate abort */
368 RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */
369 RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */
370 RXRPC_CALL_EV_RESEND, /* Tx resend required */
371 RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */
372 RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */
373 RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */
374 RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */
375 RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */
376 RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */
380 * The states that a call can be in.
382 enum rxrpc_call_state {
383 RXRPC_CALL_UNINITIALISED,
384 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
385 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
386 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
387 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
388 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */
389 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
390 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
391 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
392 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
393 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
394 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
395 RXRPC_CALL_COMPLETE, /* - call completed */
396 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */
397 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
398 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
399 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
400 RXRPC_CALL_DEAD, /* - call is dead */
401 NR__RXRPC_CALL_STATES
405 * RxRPC call definition
406 * - matched by { connection, call_id }
410 struct rxrpc_connection *conn; /* connection carrying call */
411 struct rxrpc_peer *peer; /* Peer record for remote address */
412 struct rxrpc_sock *socket; /* socket responsible */
413 struct timer_list lifetimer; /* lifetime remaining on call */
414 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */
415 struct timer_list ack_timer; /* ACK generation timer */
416 struct timer_list resend_timer; /* Tx resend timer */
417 struct work_struct destroyer; /* call destroyer */
418 struct work_struct processor; /* packet processor and ACK generator */
419 struct list_head link; /* link in master call list */
420 struct hlist_node error_link; /* link in error distribution list */
421 struct list_head accept_link; /* calls awaiting acceptance */
422 struct rb_node sock_node; /* node in socket call tree */
423 struct sk_buff_head rx_queue; /* received packets */
424 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */
425 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
426 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */
427 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
428 unsigned long user_call_ID; /* user-defined call ID */
429 unsigned long creation_jif; /* time of call creation */
431 unsigned long events;
433 rwlock_t state_lock; /* lock for state transition */
435 atomic_t skb_count; /* Outstanding packets on this call */
436 atomic_t sequence; /* Tx data packet sequence counter */
437 u32 local_abort; /* local abort code */
438 u32 remote_abort; /* remote abort code */
439 int error_report; /* Network error (ICMP/local transport) */
440 int error; /* Local error incurred */
441 enum rxrpc_call_state state : 8; /* current state of call */
442 u16 service_id; /* service ID */
443 u32 call_id; /* call ID on connection */
444 u32 cid; /* connection ID plus channel index */
445 int debug_id; /* debug ID for printks */
447 /* transmission-phase ACK management */
448 u8 acks_head; /* offset into window of first entry */
449 u8 acks_tail; /* offset into window of last entry */
450 u8 acks_winsz; /* size of un-ACK'd window */
451 u8 acks_unacked; /* lowest unacked packet in last ACK received */
452 int acks_latest; /* serial number of latest ACK received */
453 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */
454 unsigned long *acks_window; /* sent packet window
455 * - elements are pointers with LSB set if ACK'd
458 /* receive-phase ACK management */
459 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */
460 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */
461 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */
462 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */
463 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */
464 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */
465 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
466 u8 ackr_reason; /* reason to ACK */
467 u16 ackr_skew; /* skew on packet being ACK'd */
468 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
469 atomic_t ackr_not_idle; /* number of packets in Rx queue */
471 /* received packet records, 1 bit per record */
472 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
473 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
477 * locally abort an RxRPC call
479 static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
481 write_lock_bh(&call->state_lock);
482 if (call->state < RXRPC_CALL_COMPLETE) {
483 call->local_abort = abort_code;
484 call->state = RXRPC_CALL_LOCALLY_ABORTED;
485 set_bit(RXRPC_CALL_EV_ABORT, &call->events);
487 write_unlock_bh(&call->state_lock);
490 #include <trace/events/rxrpc.h>
495 extern atomic_t rxrpc_n_skbs;
496 extern u32 rxrpc_epoch;
497 extern atomic_t rxrpc_debug_id;
498 extern struct workqueue_struct *rxrpc_workqueue;
503 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
504 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long);
505 int rxrpc_reject_call(struct rxrpc_sock *);
510 void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool);
511 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool);
512 void rxrpc_process_call(struct work_struct *);
517 extern unsigned int rxrpc_max_call_lifetime;
518 extern unsigned int rxrpc_dead_call_expiry;
519 extern struct kmem_cache *rxrpc_call_jar;
520 extern struct list_head rxrpc_calls;
521 extern rwlock_t rxrpc_call_lock;
523 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
524 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
525 struct rxrpc_conn_parameters *,
526 struct sockaddr_rxrpc *,
527 unsigned long, gfp_t);
528 struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
529 struct rxrpc_connection *,
531 void rxrpc_release_call(struct rxrpc_call *);
532 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
533 void __rxrpc_put_call(struct rxrpc_call *);
534 void __exit rxrpc_destroy_all_calls(void);
536 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
538 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
541 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
543 return !rxrpc_is_service_call(call);
549 extern struct idr rxrpc_client_conn_ids;
551 void rxrpc_destroy_client_conn_ids(void);
552 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
553 struct sockaddr_rxrpc *, gfp_t);
554 void rxrpc_unpublish_client_conn(struct rxrpc_connection *);
559 void rxrpc_process_connection(struct work_struct *);
560 void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
561 void rxrpc_reject_packets(struct rxrpc_local *);
566 extern unsigned int rxrpc_connection_expiry;
567 extern struct list_head rxrpc_connections;
568 extern struct list_head rxrpc_connection_proc_list;
569 extern rwlock_t rxrpc_connection_lock;
571 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
572 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
573 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
575 void __rxrpc_disconnect_call(struct rxrpc_call *);
576 void rxrpc_disconnect_call(struct rxrpc_call *);
577 void __rxrpc_put_connection(struct rxrpc_connection *);
578 void __exit rxrpc_destroy_all_connections(void);
580 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
582 return conn->out_clientflag;
585 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
587 return !rxrpc_conn_is_client(conn);
590 static inline void rxrpc_get_connection(struct rxrpc_connection *conn)
592 atomic_inc(&conn->usage);
596 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn)
598 return atomic_inc_not_zero(&conn->usage) ? conn : NULL;
601 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
603 if (conn && atomic_dec_return(&conn->usage) == 1)
604 __rxrpc_put_connection(conn);
608 static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn)
610 if (!rxrpc_get_connection_maybe(conn))
612 if (!rxrpc_queue_work(&conn->processor))
613 rxrpc_put_connection(conn);
620 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
622 struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *,
623 struct sockaddr_rxrpc *,
625 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
630 void rxrpc_data_ready(struct sock *);
631 int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool);
632 void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
637 extern const struct rxrpc_security rxrpc_no_security;
642 extern struct key_type key_type_rxrpc;
643 extern struct key_type key_type_rxrpc_s;
645 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
646 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
647 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
653 extern void rxrpc_process_local_events(struct rxrpc_local *);
658 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *);
659 void __rxrpc_put_local(struct rxrpc_local *);
660 void __exit rxrpc_destroy_all_locals(void);
662 static inline void rxrpc_get_local(struct rxrpc_local *local)
664 atomic_inc(&local->usage);
668 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
670 return atomic_inc_not_zero(&local->usage) ? local : NULL;
673 static inline void rxrpc_put_local(struct rxrpc_local *local)
675 if (local && atomic_dec_and_test(&local->usage))
676 __rxrpc_put_local(local);
679 static inline void rxrpc_queue_local(struct rxrpc_local *local)
681 rxrpc_queue_work(&local->processor);
687 extern unsigned int rxrpc_max_backlog __read_mostly;
688 extern unsigned int rxrpc_requested_ack_delay;
689 extern unsigned int rxrpc_soft_ack_delay;
690 extern unsigned int rxrpc_idle_ack_delay;
691 extern unsigned int rxrpc_rx_window_size;
692 extern unsigned int rxrpc_rx_mtu;
693 extern unsigned int rxrpc_rx_jumbo_max;
695 extern const char *const rxrpc_pkts[];
696 extern const s8 rxrpc_ack_priority[];
698 extern const char *rxrpc_acks(u8 reason);
703 extern unsigned int rxrpc_resend_timeout;
705 int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *);
706 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
711 void rxrpc_error_report(struct sock *);
712 void rxrpc_peer_error_distributor(struct work_struct *);
717 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
718 const struct sockaddr_rxrpc *);
719 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
720 struct sockaddr_rxrpc *, gfp_t);
721 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
723 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer)
725 atomic_inc(&peer->usage);
730 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
732 return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
735 extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
736 static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
738 if (peer && atomic_dec_and_test(&peer->usage))
739 __rxrpc_put_peer(peer);
745 extern const char *const rxrpc_call_states[];
746 extern const struct file_operations rxrpc_call_seq_fops;
747 extern const struct file_operations rxrpc_connection_seq_fops;
752 void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *);
753 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
759 extern const struct rxrpc_security rxkad;
765 int __init rxrpc_init_security(void);
766 void rxrpc_exit_security(void);
767 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
768 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
773 void rxrpc_packet_destructor(struct sk_buff *);
774 void rxrpc_new_skb(struct sk_buff *);
775 void rxrpc_see_skb(struct sk_buff *);
776 void rxrpc_get_skb(struct sk_buff *);
777 void rxrpc_free_skb(struct sk_buff *);
778 void rxrpc_purge_queue(struct sk_buff_head *);
784 extern int __init rxrpc_sysctl_init(void);
785 extern void rxrpc_sysctl_exit(void);
787 static inline int __init rxrpc_sysctl_init(void) { return 0; }
788 static inline void rxrpc_sysctl_exit(void) {}
794 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
799 extern unsigned int rxrpc_debug;
801 #define dbgprintk(FMT,...) \
802 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
804 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
805 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
806 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
807 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
808 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
811 #if defined(__KDEBUG)
812 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
813 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
814 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
815 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
816 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
818 #elif defined(CONFIG_AF_RXRPC_DEBUG)
819 #define RXRPC_DEBUG_KENTER 0x01
820 #define RXRPC_DEBUG_KLEAVE 0x02
821 #define RXRPC_DEBUG_KDEBUG 0x04
822 #define RXRPC_DEBUG_KPROTO 0x08
823 #define RXRPC_DEBUG_KNET 0x10
825 #define _enter(FMT,...) \
827 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
828 kenter(FMT,##__VA_ARGS__); \
831 #define _leave(FMT,...) \
833 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
834 kleave(FMT,##__VA_ARGS__); \
837 #define _debug(FMT,...) \
839 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
840 kdebug(FMT,##__VA_ARGS__); \
843 #define _proto(FMT,...) \
845 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
846 kproto(FMT,##__VA_ARGS__); \
849 #define _net(FMT,...) \
851 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
852 knet(FMT,##__VA_ARGS__); \
856 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
857 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
858 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
859 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
860 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
864 * debug assertion checking
866 #if 1 // defined(__KDEBUGALL)
870 if (unlikely(!(X))) { \
871 pr_err("Assertion failed\n"); \
876 #define ASSERTCMP(X, OP, Y) \
878 unsigned long _x = (unsigned long)(X); \
879 unsigned long _y = (unsigned long)(Y); \
880 if (unlikely(!(_x OP _y))) { \
881 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
882 _x, _x, #OP, _y, _y); \
887 #define ASSERTIF(C, X) \
889 if (unlikely((C) && !(X))) { \
890 pr_err("Assertion failed\n"); \
895 #define ASSERTIFCMP(C, X, OP, Y) \
897 unsigned long _x = (unsigned long)(X); \
898 unsigned long _y = (unsigned long)(Y); \
899 if (unlikely((C) && !(_x OP _y))) { \
900 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
901 _x, _x, #OP, _y, _y); \
912 #define ASSERTCMP(X, OP, Y) \
916 #define ASSERTIF(C, X) \
920 #define ASSERTIFCMP(C, X, OP, Y) \
924 #endif /* __KDEBUGALL */
927 #define rxrpc_get_call(CALL) \
929 CHECK_SLAB_OKAY(&(CALL)->usage); \
930 if (atomic_inc_return(&(CALL)->usage) == 1) \
934 #define rxrpc_put_call(CALL) \
936 __rxrpc_put_call(CALL); \