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); \