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>
14 #include <net/af_rxrpc.h>
15 #include <rxrpc/packet.h>
18 #define CHECK_SLAB_OKAY(X) \
19 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
20 (POISON_FREE << 8 | POISON_FREE))
22 #define CHECK_SLAB_OKAY(X) do {} while (0)
25 #define FCRYPT_BSIZE 8
31 } __attribute__((aligned(8)));
33 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
34 #define rxrpc_queue_delayed_work(WS,D) \
35 queue_delayed_work(rxrpc_workqueue, (WS), (D))
37 #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor)
38 #define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->processor)
41 * sk_state for RxRPC sockets
45 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
46 RXRPC_CLIENT_BOUND, /* client local address bound */
47 RXRPC_SERVER_BOUND, /* server local address bound */
48 RXRPC_SERVER_LISTENING, /* server listening for connections */
49 RXRPC_CLOSE, /* socket is being closed */
53 * RxRPC socket definition
56 /* WARNING: sk has to be the first member */
58 rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */
59 struct rxrpc_local *local; /* local endpoint */
60 struct rxrpc_connection *conn; /* exclusive virtual connection */
61 struct list_head listen_link; /* link in the local endpoint's listen list */
62 struct list_head secureq; /* calls awaiting connection security clearance */
63 struct list_head acceptq; /* calls awaiting acceptance */
64 struct key *key; /* security for this socket */
65 struct key *securities; /* list of server security descriptors */
66 struct rb_root calls; /* outstanding calls on this socket */
68 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
69 #define RXRPC_SOCK_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */
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 struct sockaddr_rxrpc srx; /* local address */
74 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
75 sa_family_t proto; /* protocol created with */
78 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
81 * CPU-byteorder normalised Rx packet header.
83 struct rxrpc_host_header {
84 u32 epoch; /* client boot timestamp */
85 u32 cid; /* connection and channel ID */
86 u32 callNumber; /* call ID (0 for connection-level packets) */
87 u32 seq; /* sequence number of pkt in call stream */
88 u32 serial; /* serial number of pkt sent to network */
89 u8 type; /* packet type */
90 u8 flags; /* packet flags */
91 u8 userStatus; /* app-layer defined status */
92 u8 securityIndex; /* security protocol ID */
94 u16 _rsvd; /* reserved */
95 u16 cksum; /* kerberos security checksum */
97 u16 serviceId; /* service ID */
101 * RxRPC socket buffer private variables
102 * - max 48 bytes (struct sk_buff::cb)
104 struct rxrpc_skb_priv {
105 struct rxrpc_call *call; /* call with which associated */
106 unsigned long resend_at; /* time in jiffies at which to resend */
108 unsigned int offset; /* offset into buffer of next read */
109 int remain; /* amount of space remaining for next write */
110 u32 error; /* network error code */
111 bool need_resend; /* T if needs resending */
114 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
117 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
120 RXRPC_CMD_SEND_DATA, /* send data message */
121 RXRPC_CMD_SEND_ABORT, /* request abort generation */
122 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
123 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
127 * RxRPC security module interface
129 struct rxrpc_security {
130 const char *name; /* name of this service */
131 u8 security_index; /* security type provided */
133 /* Initialise a security service */
136 /* Clean up a security service */
139 /* initialise a connection's security */
140 int (*init_connection_security)(struct rxrpc_connection *);
142 /* prime a connection's packet security */
143 void (*prime_packet_security)(struct rxrpc_connection *);
145 /* impose security on a packet */
146 int (*secure_packet)(const struct rxrpc_call *,
151 /* verify the security on a received packet */
152 int (*verify_packet)(const struct rxrpc_call *, struct sk_buff *,
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 mutex conn_lock; /* Client connection creation lock */
189 spinlock_t lock; /* access lock */
190 rwlock_t services_lock; /* lock for services list */
191 int debug_id; /* debug ID for printks */
193 struct sockaddr_rxrpc srx; /* local address */
197 * RxRPC remote transport endpoint definition
198 * - matched by local endpoint, remote port, address and protocol type
201 struct rcu_head rcu; /* This must be first */
203 unsigned long hash_key;
204 struct hlist_node hash_link;
205 struct rxrpc_local *local;
206 struct hlist_head error_targets; /* targets for net error distribution */
207 struct work_struct error_distributor;
208 spinlock_t lock; /* access lock */
209 unsigned int if_mtu; /* interface MTU for this peer */
210 unsigned int mtu; /* network MTU for this peer */
211 unsigned int maxdata; /* data size (MTU - hdrsize) */
212 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
213 int debug_id; /* debug ID for printks */
214 int error_report; /* Net (+0) or local (+1000000) to distribute */
215 #define RXRPC_LOCAL_ERROR_OFFSET 1000000
216 struct sockaddr_rxrpc srx; /* remote address */
218 /* calculated RTT cache */
219 #define RXRPC_RTT_CACHE_SIZE 32
220 suseconds_t rtt; /* current RTT estimate (in uS) */
221 unsigned int rtt_point; /* next entry at which to insert */
222 unsigned int rtt_usage; /* amount of cache actually used */
223 suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
227 * RxRPC point-to-point transport / connection manager definition
228 * - handles a bundle of connections between two endpoints
229 * - matched by { local, peer }
231 struct rxrpc_transport {
232 struct rxrpc_local *local; /* local transport endpoint */
233 struct rxrpc_peer *peer; /* remote transport endpoint */
234 struct rb_root bundles; /* client connection bundles on this transport */
235 struct rb_root client_conns; /* client connections on this transport */
236 struct rb_root server_conns; /* server connections on this transport */
237 struct list_head link; /* link in master session list */
238 unsigned long put_time; /* time at which to reap */
239 spinlock_t client_lock; /* client connection allocation lock */
240 rwlock_t conn_lock; /* lock for active/dead connections */
242 int debug_id; /* debug ID for printks */
243 unsigned int conn_idcounter; /* connection ID counter (client) */
247 * RxRPC client connection bundle
248 * - matched by { transport, service_id, key }
250 struct rxrpc_conn_bundle {
251 struct rb_node node; /* node in transport's lookup tree */
252 struct list_head unused_conns; /* unused connections in this bundle */
253 struct list_head avail_conns; /* available connections in this bundle */
254 struct list_head busy_conns; /* busy connections in this bundle */
255 struct key *key; /* security for this bundle */
256 wait_queue_head_t chanwait; /* wait for channel to become available */
258 int debug_id; /* debug ID for printks */
259 unsigned short num_conns; /* number of connections in this bundle */
260 u16 service_id; /* Service ID for this bundle */
261 u8 security_ix; /* security type */
265 * RxRPC connection definition
266 * - matched by { transport, service_id, conn_id, direction, key }
267 * - each connection can only handle four simultaneous calls
269 struct rxrpc_connection {
270 struct rxrpc_transport *trans; /* transport session */
271 struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */
272 struct work_struct processor; /* connection event processor */
273 struct rb_node node; /* node in transport's lookup tree */
274 struct list_head link; /* link in master connection list */
275 struct list_head bundle_link; /* link in bundle */
276 struct rb_root calls; /* calls on this connection */
277 struct sk_buff_head rx_queue; /* received conn-level packets */
278 struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */
279 const struct rxrpc_security *security; /* applied security module */
280 struct key *key; /* security for this connection (client) */
281 struct key *server_key; /* security for this service */
282 struct crypto_skcipher *cipher; /* encryption handle */
283 struct rxrpc_crypt csum_iv; /* packet checksum base */
284 unsigned long events;
285 #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */
286 unsigned long put_time; /* time at which to reap */
287 rwlock_t lock; /* access lock */
288 spinlock_t state_lock; /* state-change lock */
290 enum { /* current state of connection */
291 RXRPC_CONN_UNUSED, /* - connection not yet attempted */
292 RXRPC_CONN_CLIENT, /* - client connection */
293 RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */
294 RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */
295 RXRPC_CONN_SERVER, /* - server secured connection */
296 RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */
297 RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */
298 RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */
300 u32 local_abort; /* local abort code */
301 u32 remote_abort; /* remote abort code */
302 int error; /* local error incurred */
303 int debug_id; /* debug ID for printks */
304 unsigned int call_counter; /* call ID counter */
305 atomic_t serial; /* packet serial number counter */
306 atomic_t hi_serial; /* highest serial number received */
307 u8 avail_calls; /* number of calls available */
308 u8 size_align; /* data size alignment (for security) */
309 u8 header_size; /* rxrpc + security header size */
310 u8 security_size; /* security header size */
311 u32 security_level; /* security level negotiated */
312 u32 security_nonce; /* response re-use preventer */
313 u32 epoch; /* epoch of this connection */
314 u32 cid; /* connection ID */
315 u16 service_id; /* service ID for this connection */
316 u8 security_ix; /* security type */
317 u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */
318 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
322 * Flags in call->flags.
324 enum rxrpc_call_flag {
325 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
326 RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */
327 RXRPC_CALL_RCVD_LAST, /* all packets received */
328 RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */
329 RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */
330 RXRPC_CALL_PROC_BUSY, /* the processor is busy */
331 RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */
332 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
333 RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */
337 * Events that can be raised on a call.
339 enum rxrpc_call_event {
340 RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */
341 RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */
342 RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */
343 RXRPC_CALL_EV_RCVD_ERROR, /* network error received */
344 RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */
345 RXRPC_CALL_EV_ACK, /* need to generate ACK */
346 RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */
347 RXRPC_CALL_EV_ABORT, /* need to generate abort */
348 RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */
349 RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */
350 RXRPC_CALL_EV_RESEND, /* Tx resend required */
351 RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */
352 RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */
353 RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */
354 RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */
355 RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */
356 RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */
360 * The states that a call can be in.
362 enum rxrpc_call_state {
363 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
364 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
365 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
366 RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */
367 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
368 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
369 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
370 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
371 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
372 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
373 RXRPC_CALL_COMPLETE, /* - call completed */
374 RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */
375 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
376 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
377 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
378 RXRPC_CALL_DEAD, /* - call is dead */
379 NR__RXRPC_CALL_STATES
383 * RxRPC call definition
384 * - matched by { connection, call_id }
387 struct rxrpc_connection *conn; /* connection carrying call */
388 struct rxrpc_sock *socket; /* socket responsible */
389 struct timer_list lifetimer; /* lifetime remaining on call */
390 struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */
391 struct timer_list ack_timer; /* ACK generation timer */
392 struct timer_list resend_timer; /* Tx resend timer */
393 struct work_struct destroyer; /* call destroyer */
394 struct work_struct processor; /* packet processor and ACK generator */
395 struct list_head link; /* link in master call list */
396 struct hlist_node error_link; /* link in error distribution list */
397 struct list_head accept_link; /* calls awaiting acceptance */
398 struct rb_node sock_node; /* node in socket call tree */
399 struct rb_node conn_node; /* node in connection call tree */
400 struct sk_buff_head rx_queue; /* received packets */
401 struct sk_buff_head rx_oos_queue; /* packets received out of sequence */
402 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
403 wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */
404 unsigned long user_call_ID; /* user-defined call ID */
405 unsigned long creation_jif; /* time of call creation */
407 unsigned long events;
409 rwlock_t state_lock; /* lock for state transition */
411 atomic_t sequence; /* Tx data packet sequence counter */
412 u32 local_abort; /* local abort code */
413 u32 remote_abort; /* remote abort code */
414 int error_report; /* Network error (ICMP/local transport) */
415 int error; /* Local error incurred */
416 enum rxrpc_call_state state : 8; /* current state of call */
417 int debug_id; /* debug ID for printks */
418 u8 channel; /* connection channel occupied by this call */
420 /* transmission-phase ACK management */
421 u8 acks_head; /* offset into window of first entry */
422 u8 acks_tail; /* offset into window of last entry */
423 u8 acks_winsz; /* size of un-ACK'd window */
424 u8 acks_unacked; /* lowest unacked packet in last ACK received */
425 int acks_latest; /* serial number of latest ACK received */
426 rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */
427 unsigned long *acks_window; /* sent packet window
428 * - elements are pointers with LSB set if ACK'd
431 /* receive-phase ACK management */
432 rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */
433 rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */
434 rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */
435 rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */
436 rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */
437 rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */
438 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
439 u8 ackr_reason; /* reason to ACK */
440 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
441 atomic_t ackr_not_idle; /* number of packets in Rx queue */
443 /* received packet records, 1 bit per record */
444 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
445 unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
447 struct hlist_node hash_node;
448 unsigned long hash_key; /* Full hash key */
449 u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */
450 struct rxrpc_local *local; /* Local endpoint. Used for hashing. */
451 sa_family_t proto; /* Frame protocol */
452 u32 call_id; /* call ID on connection */
453 u32 cid; /* connection ID plus channel index */
454 u32 epoch; /* epoch of this connection */
455 u16 service_id; /* service ID */
456 union { /* Peer IP address for hashing */
458 __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */
463 * locally abort an RxRPC call
465 static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
467 write_lock_bh(&call->state_lock);
468 if (call->state < RXRPC_CALL_COMPLETE) {
469 call->local_abort = abort_code;
470 call->state = RXRPC_CALL_LOCALLY_ABORTED;
471 set_bit(RXRPC_CALL_EV_ABORT, &call->events);
473 write_unlock_bh(&call->state_lock);
479 extern atomic_t rxrpc_n_skbs;
480 extern u32 rxrpc_epoch;
481 extern atomic_t rxrpc_debug_id;
482 extern struct workqueue_struct *rxrpc_workqueue;
484 extern struct rxrpc_transport *rxrpc_name_to_transport(struct rxrpc_sock *,
491 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
492 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long);
493 int rxrpc_reject_call(struct rxrpc_sock *);
498 void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool);
499 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool);
500 void rxrpc_process_call(struct work_struct *);
505 extern unsigned int rxrpc_max_call_lifetime;
506 extern unsigned int rxrpc_dead_call_expiry;
507 extern struct kmem_cache *rxrpc_call_jar;
508 extern struct list_head rxrpc_calls;
509 extern rwlock_t rxrpc_call_lock;
511 struct rxrpc_call *rxrpc_find_call_hash(struct rxrpc_host_header *,
512 void *, sa_family_t, const void *);
513 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
514 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
515 struct rxrpc_transport *,
516 struct rxrpc_conn_bundle *,
517 unsigned long, gfp_t);
518 struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
519 struct rxrpc_connection *,
520 struct rxrpc_host_header *);
521 void rxrpc_release_call(struct rxrpc_call *);
522 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
523 void __rxrpc_put_call(struct rxrpc_call *);
524 void __exit rxrpc_destroy_all_calls(void);
529 void rxrpc_process_connection(struct work_struct *);
530 void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
531 void rxrpc_reject_packets(struct rxrpc_local *);
536 extern unsigned int rxrpc_connection_expiry;
537 extern struct list_head rxrpc_connections;
538 extern rwlock_t rxrpc_connection_lock;
540 struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *,
541 struct rxrpc_transport *,
542 struct key *, u16, gfp_t);
543 void rxrpc_put_bundle(struct rxrpc_transport *, struct rxrpc_conn_bundle *);
544 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *,
545 struct rxrpc_conn_bundle *, struct rxrpc_call *, gfp_t);
546 void rxrpc_put_connection(struct rxrpc_connection *);
547 void __exit rxrpc_destroy_all_connections(void);
548 struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *,
549 struct rxrpc_host_header *);
550 extern struct rxrpc_connection *
551 rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_host_header *);
556 void rxrpc_data_ready(struct sock *);
557 int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool);
558 void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
563 extern const struct rxrpc_security rxrpc_no_security;
568 extern struct key_type key_type_rxrpc;
569 extern struct key_type key_type_rxrpc_s;
571 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
572 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
573 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
579 extern void rxrpc_process_local_events(struct rxrpc_local *);
584 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *);
585 void __rxrpc_put_local(struct rxrpc_local *);
586 void __exit rxrpc_destroy_all_locals(void);
588 static inline void rxrpc_get_local(struct rxrpc_local *local)
590 atomic_inc(&local->usage);
594 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
596 return atomic_inc_not_zero(&local->usage) ? local : NULL;
599 static inline void rxrpc_put_local(struct rxrpc_local *local)
601 if (atomic_dec_and_test(&local->usage))
602 __rxrpc_put_local(local);
608 extern unsigned int rxrpc_max_backlog __read_mostly;
609 extern unsigned int rxrpc_requested_ack_delay;
610 extern unsigned int rxrpc_soft_ack_delay;
611 extern unsigned int rxrpc_idle_ack_delay;
612 extern unsigned int rxrpc_rx_window_size;
613 extern unsigned int rxrpc_rx_mtu;
614 extern unsigned int rxrpc_rx_jumbo_max;
616 extern const char *const rxrpc_pkts[];
617 extern const s8 rxrpc_ack_priority[];
619 extern const char *rxrpc_acks(u8 reason);
624 extern unsigned int rxrpc_resend_timeout;
626 int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *);
627 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
632 void rxrpc_error_report(struct sock *);
633 void rxrpc_peer_error_distributor(struct work_struct *);
638 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
639 const struct sockaddr_rxrpc *);
640 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
641 struct sockaddr_rxrpc *, gfp_t);
642 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
644 static inline void rxrpc_get_peer(struct rxrpc_peer *peer)
646 atomic_inc(&peer->usage);
650 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
652 return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
655 extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
656 static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
658 if (atomic_dec_and_test(&peer->usage))
659 __rxrpc_put_peer(peer);
665 extern const char *const rxrpc_call_states[];
666 extern const struct file_operations rxrpc_call_seq_fops;
667 extern const struct file_operations rxrpc_connection_seq_fops;
672 void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *);
673 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
679 extern const struct rxrpc_security rxkad;
685 int __init rxrpc_init_security(void);
686 void rxrpc_exit_security(void);
687 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
688 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
693 void rxrpc_packet_destructor(struct sk_buff *);
699 extern int __init rxrpc_sysctl_init(void);
700 extern void rxrpc_sysctl_exit(void);
702 static inline int __init rxrpc_sysctl_init(void) { return 0; }
703 static inline void rxrpc_sysctl_exit(void) {}
709 extern unsigned int rxrpc_transport_expiry;
711 struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *,
712 struct rxrpc_peer *, gfp_t);
713 void rxrpc_put_transport(struct rxrpc_transport *);
714 void __exit rxrpc_destroy_all_transports(void);
715 struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *,
716 struct rxrpc_peer *);
721 void rxrpc_get_addr_from_skb(struct rxrpc_local *, const struct sk_buff *,
722 struct sockaddr_rxrpc *);
727 extern unsigned int rxrpc_debug;
729 #define dbgprintk(FMT,...) \
730 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
732 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
733 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
734 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
735 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
736 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
739 #if defined(__KDEBUG)
740 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
741 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
742 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
743 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
744 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
746 #elif defined(CONFIG_AF_RXRPC_DEBUG)
747 #define RXRPC_DEBUG_KENTER 0x01
748 #define RXRPC_DEBUG_KLEAVE 0x02
749 #define RXRPC_DEBUG_KDEBUG 0x04
750 #define RXRPC_DEBUG_KPROTO 0x08
751 #define RXRPC_DEBUG_KNET 0x10
753 #define _enter(FMT,...) \
755 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
756 kenter(FMT,##__VA_ARGS__); \
759 #define _leave(FMT,...) \
761 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
762 kleave(FMT,##__VA_ARGS__); \
765 #define _debug(FMT,...) \
767 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
768 kdebug(FMT,##__VA_ARGS__); \
771 #define _proto(FMT,...) \
773 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
774 kproto(FMT,##__VA_ARGS__); \
777 #define _net(FMT,...) \
779 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
780 knet(FMT,##__VA_ARGS__); \
784 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
785 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
786 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
787 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
788 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
792 * debug assertion checking
794 #if 1 // defined(__KDEBUGALL)
798 if (unlikely(!(X))) { \
799 pr_err("Assertion failed\n"); \
804 #define ASSERTCMP(X, OP, Y) \
806 unsigned long _x = (unsigned long)(X); \
807 unsigned long _y = (unsigned long)(Y); \
808 if (unlikely(!(_x OP _y))) { \
809 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
810 _x, _x, #OP, _y, _y); \
815 #define ASSERTIF(C, X) \
817 if (unlikely((C) && !(X))) { \
818 pr_err("Assertion failed\n"); \
823 #define ASSERTIFCMP(C, X, OP, Y) \
825 unsigned long _x = (unsigned long)(X); \
826 unsigned long _y = (unsigned long)(Y); \
827 if (unlikely((C) && !(_x OP _y))) { \
828 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
829 _x, _x, #OP, _y, _y); \
840 #define ASSERTCMP(X, OP, Y) \
844 #define ASSERTIF(C, X) \
848 #define ASSERTIFCMP(C, X, OP, Y) \
852 #endif /* __KDEBUGALL */
855 * socket buffer accounting / leak finding
857 static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn)
859 //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
860 //atomic_inc(&rxrpc_n_skbs);
863 #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__)
865 static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn)
867 //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
868 //atomic_dec(&rxrpc_n_skbs);
871 #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__)
873 static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn)
876 CHECK_SLAB_OKAY(&skb->users);
877 //_net("free skb %p %s [%d]",
878 // skb, fn, atomic_read(&rxrpc_n_skbs));
879 //atomic_dec(&rxrpc_n_skbs);
884 #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__)
886 static inline void rxrpc_purge_queue(struct sk_buff_head *list)
889 while ((skb = skb_dequeue((list))) != NULL)
893 #define rxrpc_get_call(CALL) \
895 CHECK_SLAB_OKAY(&(CALL)->usage); \
896 if (atomic_inc_return(&(CALL)->usage) == 1) \
900 #define rxrpc_put_call(CALL) \
902 __rxrpc_put_call(CALL); \