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 struct rxrpc_connection
;
41 * Mark applied to socket buffers.
44 RXRPC_SKB_MARK_DATA
, /* data message */
45 RXRPC_SKB_MARK_FINAL_ACK
, /* final ACK received message */
46 RXRPC_SKB_MARK_BUSY
, /* server busy message */
47 RXRPC_SKB_MARK_REMOTE_ABORT
, /* remote abort message */
48 RXRPC_SKB_MARK_LOCAL_ABORT
, /* local abort message */
49 RXRPC_SKB_MARK_NET_ERROR
, /* network error message */
50 RXRPC_SKB_MARK_LOCAL_ERROR
, /* local error message */
51 RXRPC_SKB_MARK_NEW_CALL
, /* local error message */
55 * sk_state for RxRPC sockets
59 RXRPC_CLIENT_UNBOUND
, /* Unbound socket used as client */
60 RXRPC_CLIENT_BOUND
, /* client local address bound */
61 RXRPC_SERVER_BOUND
, /* server local address bound */
62 RXRPC_SERVER_LISTENING
, /* server listening for connections */
63 RXRPC_CLOSE
, /* socket is being closed */
67 * Service backlog preallocation.
69 * This contains circular buffers of preallocated peers, connections and calls
70 * for incoming service calls and their head and tail pointers. This allows
71 * calls to be set up in the data_ready handler, thereby avoiding the need to
72 * shuffle packets around so much.
74 struct rxrpc_backlog
{
75 unsigned short peer_backlog_head
;
76 unsigned short peer_backlog_tail
;
77 unsigned short conn_backlog_head
;
78 unsigned short conn_backlog_tail
;
79 unsigned short call_backlog_head
;
80 unsigned short call_backlog_tail
;
81 #define RXRPC_BACKLOG_MAX 32
82 struct rxrpc_peer
*peer_backlog
[RXRPC_BACKLOG_MAX
];
83 struct rxrpc_connection
*conn_backlog
[RXRPC_BACKLOG_MAX
];
84 struct rxrpc_call
*call_backlog
[RXRPC_BACKLOG_MAX
];
88 * RxRPC socket definition
91 /* WARNING: sk has to be the first member */
93 rxrpc_notify_new_call_t notify_new_call
; /* Func to notify of new call */
94 rxrpc_discard_new_call_t discard_new_call
; /* Func to discard a new call */
95 struct rxrpc_local
*local
; /* local endpoint */
96 struct hlist_node listen_link
; /* link in the local endpoint's listen list */
97 struct rxrpc_backlog
*backlog
; /* Preallocation for services */
98 spinlock_t incoming_lock
; /* Incoming call vs service shutdown lock */
99 struct list_head sock_calls
; /* List of calls owned by this socket */
100 struct list_head to_be_accepted
; /* calls awaiting acceptance */
101 struct list_head recvmsg_q
; /* Calls awaiting recvmsg's attention */
102 rwlock_t recvmsg_lock
; /* Lock for recvmsg_q */
103 struct key
*key
; /* security for this socket */
104 struct key
*securities
; /* list of server security descriptors */
105 struct rb_root calls
; /* User ID -> call mapping */
107 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
108 rwlock_t call_lock
; /* lock for calls */
109 u32 min_sec_level
; /* minimum security level */
110 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
111 bool exclusive
; /* Exclusive connection for a client socket */
112 sa_family_t family
; /* Protocol family created with */
113 struct sockaddr_rxrpc srx
; /* local address */
114 struct sockaddr_rxrpc connect_srx
; /* Default client address from connect() */
117 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
120 * CPU-byteorder normalised Rx packet header.
122 struct rxrpc_host_header
{
123 u32 epoch
; /* client boot timestamp */
124 u32 cid
; /* connection and channel ID */
125 u32 callNumber
; /* call ID (0 for connection-level packets) */
126 u32 seq
; /* sequence number of pkt in call stream */
127 u32 serial
; /* serial number of pkt sent to network */
128 u8 type
; /* packet type */
129 u8 flags
; /* packet flags */
130 u8 userStatus
; /* app-layer defined status */
131 u8 securityIndex
; /* security protocol ID */
133 u16 _rsvd
; /* reserved */
134 u16 cksum
; /* kerberos security checksum */
136 u16 serviceId
; /* service ID */
140 * RxRPC socket buffer private variables
141 * - max 48 bytes (struct sk_buff::cb)
143 struct rxrpc_skb_priv
{
145 unsigned long resend_at
; /* time in jiffies at which to resend */
147 u8 nr_jumbo
; /* Number of jumbo subpackets */
151 unsigned int offset
; /* offset into buffer of next read */
152 int remain
; /* amount of space remaining for next write */
153 u32 error
; /* network error code */
156 struct rxrpc_host_header hdr
; /* RxRPC packet header from this packet */
159 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
162 * RxRPC security module interface
164 struct rxrpc_security
{
165 const char *name
; /* name of this service */
166 u8 security_index
; /* security type provided */
168 /* Initialise a security service */
171 /* Clean up a security service */
174 /* initialise a connection's security */
175 int (*init_connection_security
)(struct rxrpc_connection
*);
177 /* prime a connection's packet security */
178 int (*prime_packet_security
)(struct rxrpc_connection
*);
180 /* impose security on a packet */
181 int (*secure_packet
)(struct rxrpc_call
*,
186 /* verify the security on a received packet */
187 int (*verify_packet
)(struct rxrpc_call
*, struct sk_buff
*,
188 unsigned int, unsigned int, rxrpc_seq_t
, u16
);
190 /* Locate the data in a received packet that has been verified. */
191 void (*locate_data
)(struct rxrpc_call
*, struct sk_buff
*,
192 unsigned int *, unsigned int *);
194 /* issue a challenge */
195 int (*issue_challenge
)(struct rxrpc_connection
*);
197 /* respond to a challenge */
198 int (*respond_to_challenge
)(struct rxrpc_connection
*,
202 /* verify a response */
203 int (*verify_response
)(struct rxrpc_connection
*,
207 /* clear connection security */
208 void (*clear
)(struct rxrpc_connection
*);
212 * RxRPC local transport endpoint description
213 * - owned by a single AF_RXRPC socket
214 * - pointed to by transport socket struct sk_user_data
219 struct list_head link
;
220 struct socket
*socket
; /* my UDP socket */
221 struct work_struct processor
;
222 struct hlist_head services
; /* services listening on this endpoint */
223 struct rw_semaphore defrag_sem
; /* control re-enablement of IP DF bit */
224 struct sk_buff_head reject_queue
; /* packets awaiting rejection */
225 struct sk_buff_head event_queue
; /* endpoint event packets awaiting processing */
226 struct rb_root client_conns
; /* Client connections by socket params */
227 spinlock_t client_conns_lock
; /* Lock for client_conns */
228 spinlock_t lock
; /* access lock */
229 rwlock_t services_lock
; /* lock for services list */
230 int debug_id
; /* debug ID for printks */
232 struct sockaddr_rxrpc srx
; /* local address */
236 * RxRPC remote transport endpoint definition
237 * - matched by local endpoint, remote port, address and protocol type
240 struct rcu_head rcu
; /* This must be first */
242 unsigned long hash_key
;
243 struct hlist_node hash_link
;
244 struct rxrpc_local
*local
;
245 struct hlist_head error_targets
; /* targets for net error distribution */
246 struct work_struct error_distributor
;
247 struct rb_root service_conns
; /* Service connections */
248 seqlock_t service_conn_lock
;
249 spinlock_t lock
; /* access lock */
250 unsigned int if_mtu
; /* interface MTU for this peer */
251 unsigned int mtu
; /* network MTU for this peer */
252 unsigned int maxdata
; /* data size (MTU - hdrsize) */
253 unsigned short hdrsize
; /* header size (IP + UDP + RxRPC) */
254 int debug_id
; /* debug ID for printks */
255 int error_report
; /* Net (+0) or local (+1000000) to distribute */
256 #define RXRPC_LOCAL_ERROR_OFFSET 1000000
257 struct sockaddr_rxrpc srx
; /* remote address */
259 /* calculated RTT cache */
260 #define RXRPC_RTT_CACHE_SIZE 32
261 suseconds_t rtt
; /* current RTT estimate (in uS) */
262 unsigned int rtt_point
; /* next entry at which to insert */
263 unsigned int rtt_usage
; /* amount of cache actually used */
264 suseconds_t rtt_cache
[RXRPC_RTT_CACHE_SIZE
]; /* calculated RTT cache */
268 * Keys for matching a connection.
270 struct rxrpc_conn_proto
{
273 u32 epoch
; /* epoch of this connection */
274 u32 cid
; /* connection ID */
280 struct rxrpc_conn_parameters
{
281 struct rxrpc_local
*local
; /* Representation of local endpoint */
282 struct rxrpc_peer
*peer
; /* Remote endpoint */
283 struct key
*key
; /* Security details */
284 bool exclusive
; /* T if conn is exclusive */
285 u16 service_id
; /* Service ID for this connection */
286 u32 security_level
; /* Security level selected */
290 * Bits in the connection flags.
292 enum rxrpc_conn_flag
{
293 RXRPC_CONN_HAS_IDR
, /* Has a client conn ID assigned */
294 RXRPC_CONN_IN_SERVICE_CONNS
, /* Conn is in peer->service_conns */
295 RXRPC_CONN_IN_CLIENT_CONNS
, /* Conn is in local->client_conns */
296 RXRPC_CONN_EXPOSED
, /* Conn has extra ref for exposure */
297 RXRPC_CONN_DONT_REUSE
, /* Don't reuse this connection */
298 RXRPC_CONN_COUNTED
, /* Counted by rxrpc_nr_client_conns */
302 * Events that can be raised upon a connection.
304 enum rxrpc_conn_event
{
305 RXRPC_CONN_EV_CHALLENGE
, /* Send challenge packet */
309 * The connection cache state.
311 enum rxrpc_conn_cache_state
{
312 RXRPC_CONN_CLIENT_INACTIVE
, /* Conn is not yet listed */
313 RXRPC_CONN_CLIENT_WAITING
, /* Conn is on wait list, waiting for capacity */
314 RXRPC_CONN_CLIENT_ACTIVE
, /* Conn is on active list, doing calls */
315 RXRPC_CONN_CLIENT_CULLED
, /* Conn is culled and delisted, doing calls */
316 RXRPC_CONN_CLIENT_IDLE
, /* Conn is on idle list, doing mostly nothing */
320 * The connection protocol state.
322 enum rxrpc_conn_proto_state
{
323 RXRPC_CONN_UNUSED
, /* Connection not yet attempted */
324 RXRPC_CONN_CLIENT
, /* Client connection */
325 RXRPC_CONN_SERVICE_PREALLOC
, /* Service connection preallocation */
326 RXRPC_CONN_SERVICE_UNSECURED
, /* Service unsecured connection */
327 RXRPC_CONN_SERVICE_CHALLENGING
, /* Service challenging for security */
328 RXRPC_CONN_SERVICE
, /* Service secured connection */
329 RXRPC_CONN_REMOTELY_ABORTED
, /* Conn aborted by peer */
330 RXRPC_CONN_LOCALLY_ABORTED
, /* Conn aborted locally */
331 RXRPC_CONN__NR_STATES
335 * RxRPC connection definition
336 * - matched by { local, peer, epoch, conn_id, direction }
337 * - each connection can only handle four simultaneous calls
339 struct rxrpc_connection
{
340 struct rxrpc_conn_proto proto
;
341 struct rxrpc_conn_parameters params
;
345 struct list_head cache_link
;
347 spinlock_t channel_lock
;
348 unsigned char active_chans
; /* Mask of active channels */
349 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
350 struct list_head waiting_calls
; /* Calls waiting for channels */
351 struct rxrpc_channel
{
352 struct rxrpc_call __rcu
*call
; /* Active call */
353 u32 call_id
; /* ID of current call */
354 u32 call_counter
; /* Call ID counter */
355 u32 last_call
; /* ID of last call */
356 u8 last_type
; /* Type of last packet */
362 } channels
[RXRPC_MAXCALLS
];
364 struct work_struct processor
; /* connection event processor */
366 struct rb_node client_node
; /* Node in local->client_conns */
367 struct rb_node service_node
; /* Node in peer->service_conns */
369 struct list_head proc_link
; /* link in procfs list */
370 struct list_head link
; /* link in master connection list */
371 struct sk_buff_head rx_queue
; /* received conn-level packets */
372 const struct rxrpc_security
*security
; /* applied security module */
373 struct key
*server_key
; /* security for this service */
374 struct crypto_skcipher
*cipher
; /* encryption handle */
375 struct rxrpc_crypt csum_iv
; /* packet checksum base */
377 unsigned long events
;
378 unsigned long idle_timestamp
; /* Time at which last became idle */
379 spinlock_t state_lock
; /* state-change lock */
380 enum rxrpc_conn_cache_state cache_state
;
381 enum rxrpc_conn_proto_state state
; /* current state of connection */
382 u32 local_abort
; /* local abort code */
383 u32 remote_abort
; /* remote abort code */
384 int debug_id
; /* debug ID for printks */
385 atomic_t serial
; /* packet serial number counter */
386 unsigned int hi_serial
; /* highest serial number received */
387 u8 size_align
; /* data size alignment (for security) */
388 u8 header_size
; /* rxrpc + security header size */
389 u8 security_size
; /* security header size */
390 u32 security_nonce
; /* response re-use preventer */
391 u8 security_ix
; /* security type */
392 u8 out_clientflag
; /* RXRPC_CLIENT_INITIATED if we are client */
396 * Flags in call->flags.
398 enum rxrpc_call_flag
{
399 RXRPC_CALL_RELEASED
, /* call has been released - no more message to userspace */
400 RXRPC_CALL_HAS_USERID
, /* has a user ID attached */
401 RXRPC_CALL_IS_SERVICE
, /* Call is service call */
402 RXRPC_CALL_EXPOSED
, /* The call was exposed to the world */
403 RXRPC_CALL_RX_LAST
, /* Received the last packet (at rxtx_top) */
404 RXRPC_CALL_TX_LAST
, /* Last packet in Tx buffer (at rxtx_top) */
408 * Events that can be raised on a call.
410 enum rxrpc_call_event
{
411 RXRPC_CALL_EV_ACK
, /* need to generate ACK */
412 RXRPC_CALL_EV_ABORT
, /* need to generate abort */
413 RXRPC_CALL_EV_TIMER
, /* Timer expired */
414 RXRPC_CALL_EV_RESEND
, /* Tx resend required */
418 * The states that a call can be in.
420 enum rxrpc_call_state
{
421 RXRPC_CALL_UNINITIALISED
,
422 RXRPC_CALL_CLIENT_AWAIT_CONN
, /* - client waiting for connection to become available */
423 RXRPC_CALL_CLIENT_SEND_REQUEST
, /* - client sending request phase */
424 RXRPC_CALL_CLIENT_AWAIT_REPLY
, /* - client awaiting reply */
425 RXRPC_CALL_CLIENT_RECV_REPLY
, /* - client receiving reply phase */
426 RXRPC_CALL_SERVER_PREALLOC
, /* - service preallocation */
427 RXRPC_CALL_SERVER_SECURING
, /* - server securing request connection */
428 RXRPC_CALL_SERVER_ACCEPTING
, /* - server accepting request */
429 RXRPC_CALL_SERVER_RECV_REQUEST
, /* - server receiving request */
430 RXRPC_CALL_SERVER_ACK_REQUEST
, /* - server pending ACK of request */
431 RXRPC_CALL_SERVER_SEND_REPLY
, /* - server sending reply */
432 RXRPC_CALL_SERVER_AWAIT_ACK
, /* - server awaiting final ACK */
433 RXRPC_CALL_COMPLETE
, /* - call complete */
434 NR__RXRPC_CALL_STATES
438 * Call completion condition (state == RXRPC_CALL_COMPLETE).
440 enum rxrpc_call_completion
{
441 RXRPC_CALL_SUCCEEDED
, /* - Normal termination */
442 RXRPC_CALL_REMOTELY_ABORTED
, /* - call aborted by peer */
443 RXRPC_CALL_LOCALLY_ABORTED
, /* - call aborted locally on error or close */
444 RXRPC_CALL_LOCAL_ERROR
, /* - call failed due to local error */
445 RXRPC_CALL_NETWORK_ERROR
, /* - call terminated by network error */
446 NR__RXRPC_CALL_COMPLETIONS
450 * RxRPC call definition
451 * - matched by { connection, call_id }
455 struct rxrpc_connection
*conn
; /* connection carrying call */
456 struct rxrpc_peer
*peer
; /* Peer record for remote address */
457 struct rxrpc_sock __rcu
*socket
; /* socket responsible */
458 unsigned long ack_at
; /* When deferred ACK needs to happen */
459 unsigned long resend_at
; /* When next resend needs to happen */
460 unsigned long expire_at
; /* When the call times out */
461 struct timer_list timer
; /* Combined event timer */
462 struct work_struct processor
; /* Event processor */
463 rxrpc_notify_rx_t notify_rx
; /* kernel service Rx notification function */
464 struct list_head link
; /* link in master call list */
465 struct list_head chan_wait_link
; /* Link in conn->waiting_calls */
466 struct hlist_node error_link
; /* link in error distribution list */
467 struct list_head accept_link
; /* Link in rx->acceptq */
468 struct list_head recvmsg_link
; /* Link in rx->recvmsg_q */
469 struct list_head sock_link
; /* Link in rx->sock_calls */
470 struct rb_node sock_node
; /* Node in rx->calls */
471 struct sk_buff
*tx_pending
; /* Tx socket buffer being filled */
472 wait_queue_head_t waitq
; /* Wait queue for channel or Tx */
473 __be32 crypto_buf
[2]; /* Temporary packet crypto buffer */
474 unsigned long user_call_ID
; /* user-defined call ID */
476 unsigned long events
;
478 rwlock_t state_lock
; /* lock for state transition */
479 u32 abort_code
; /* Local/remote abort code */
480 int error
; /* Local error incurred */
481 enum rxrpc_call_state state
; /* current state of call */
482 enum rxrpc_call_completion completion
; /* Call completion condition */
484 u16 service_id
; /* service ID */
485 u8 security_ix
; /* Security type */
486 u32 call_id
; /* call ID on connection */
487 u32 cid
; /* connection ID plus channel index */
488 int debug_id
; /* debug ID for printks */
490 /* Rx/Tx circular buffer, depending on phase.
492 * In the Rx phase, packets are annotated with 0 or the number of the
493 * segment of a jumbo packet each buffer refers to. There can be up to
494 * 47 segments in a maximum-size UDP packet.
496 * In the Tx phase, packets are annotated with which buffers have been
499 #define RXRPC_RXTX_BUFF_SIZE 64
500 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
501 struct sk_buff
**rxtx_buffer
;
502 u8
*rxtx_annotations
;
503 #define RXRPC_TX_ANNO_ACK 0
504 #define RXRPC_TX_ANNO_UNACK 1
505 #define RXRPC_TX_ANNO_NAK 2
506 #define RXRPC_TX_ANNO_RETRANS 3
507 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */
508 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */
509 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
510 rxrpc_seq_t tx_hard_ack
; /* Dead slot in buffer; the first transmitted but
511 * not hard-ACK'd packet follows this.
513 rxrpc_seq_t tx_top
; /* Highest Tx slot allocated. */
514 rxrpc_seq_t rx_hard_ack
; /* Dead slot in buffer; the first received but not
515 * consumed packet follows this.
517 rxrpc_seq_t rx_top
; /* Highest Rx slot allocated. */
518 rxrpc_seq_t rx_expect_next
; /* Expected next packet sequence number */
519 u8 rx_winsize
; /* Size of Rx window */
520 u8 tx_winsize
; /* Maximum size of Tx window */
521 u8 nr_jumbo_dup
; /* Number of jumbo duplicates */
523 /* receive-phase ACK management */
524 u8 ackr_reason
; /* reason to ACK */
525 u16 ackr_skew
; /* skew on packet being ACK'd */
526 rxrpc_serial_t ackr_serial
; /* serial of packet being ACK'd */
527 rxrpc_seq_t ackr_prev_seq
; /* previous sequence number received */
528 unsigned short rx_pkt_offset
; /* Current recvmsg packet offset */
529 unsigned short rx_pkt_len
; /* Current recvmsg packet len */
531 /* transmission-phase ACK management */
532 rxrpc_serial_t acks_latest
; /* serial number of latest ACK received */
535 enum rxrpc_call_trace
{
536 rxrpc_call_new_client
,
537 rxrpc_call_new_service
,
539 rxrpc_call_queued_ref
,
542 rxrpc_call_got_userid
,
544 rxrpc_call_put_userid
,
545 rxrpc_call_put_noqueue
,
549 extern const char rxrpc_call_traces
[rxrpc_call__nr_trace
][4];
551 #include <trace/events/rxrpc.h>
556 extern atomic_t rxrpc_n_skbs
;
557 extern u32 rxrpc_epoch
;
558 extern atomic_t rxrpc_debug_id
;
559 extern struct workqueue_struct
*rxrpc_workqueue
;
564 int rxrpc_service_prealloc(struct rxrpc_sock
*, gfp_t
);
565 void rxrpc_discard_prealloc(struct rxrpc_sock
*);
566 struct rxrpc_call
*rxrpc_new_incoming_call(struct rxrpc_local
*,
567 struct rxrpc_connection
*,
569 void rxrpc_accept_incoming_calls(struct rxrpc_local
*);
570 struct rxrpc_call
*rxrpc_accept_call(struct rxrpc_sock
*, unsigned long,
572 int rxrpc_reject_call(struct rxrpc_sock
*);
577 void rxrpc_propose_ACK(struct rxrpc_call
*, u8
, u16
, u32
, bool, bool);
578 void rxrpc_process_call(struct work_struct
*);
583 extern const char *const rxrpc_call_states
[];
584 extern const char *const rxrpc_call_completions
[];
585 extern unsigned int rxrpc_max_call_lifetime
;
586 extern struct kmem_cache
*rxrpc_call_jar
;
587 extern struct list_head rxrpc_calls
;
588 extern rwlock_t rxrpc_call_lock
;
590 struct rxrpc_call
*rxrpc_find_call_by_user_ID(struct rxrpc_sock
*, unsigned long);
591 struct rxrpc_call
*rxrpc_alloc_call(gfp_t
);
592 struct rxrpc_call
*rxrpc_new_client_call(struct rxrpc_sock
*,
593 struct rxrpc_conn_parameters
*,
594 struct sockaddr_rxrpc
*,
595 unsigned long, gfp_t
);
596 void rxrpc_incoming_call(struct rxrpc_sock
*, struct rxrpc_call
*,
598 void rxrpc_release_call(struct rxrpc_sock
*, struct rxrpc_call
*);
599 void rxrpc_release_calls_on_socket(struct rxrpc_sock
*);
600 bool __rxrpc_queue_call(struct rxrpc_call
*);
601 bool rxrpc_queue_call(struct rxrpc_call
*);
602 void rxrpc_see_call(struct rxrpc_call
*);
603 void rxrpc_get_call(struct rxrpc_call
*, enum rxrpc_call_trace
);
604 void rxrpc_put_call(struct rxrpc_call
*, enum rxrpc_call_trace
);
605 void rxrpc_cleanup_call(struct rxrpc_call
*);
606 void __exit
rxrpc_destroy_all_calls(void);
608 static inline bool rxrpc_is_service_call(const struct rxrpc_call
*call
)
610 return test_bit(RXRPC_CALL_IS_SERVICE
, &call
->flags
);
613 static inline bool rxrpc_is_client_call(const struct rxrpc_call
*call
)
615 return !rxrpc_is_service_call(call
);
619 * Transition a call to the complete state.
621 static inline bool __rxrpc_set_call_completion(struct rxrpc_call
*call
,
622 enum rxrpc_call_completion
compl,
626 if (call
->state
< RXRPC_CALL_COMPLETE
) {
627 call
->abort_code
= abort_code
;
629 call
->completion
= compl,
630 call
->state
= RXRPC_CALL_COMPLETE
;
636 static inline bool rxrpc_set_call_completion(struct rxrpc_call
*call
,
637 enum rxrpc_call_completion
compl,
643 write_lock_bh(&call
->state_lock
);
644 ret
= __rxrpc_set_call_completion(call
, compl, abort_code
, error
);
645 write_unlock_bh(&call
->state_lock
);
650 * Record that a call successfully completed.
652 static inline bool __rxrpc_call_completed(struct rxrpc_call
*call
)
654 return __rxrpc_set_call_completion(call
, RXRPC_CALL_SUCCEEDED
, 0, 0);
657 static inline bool rxrpc_call_completed(struct rxrpc_call
*call
)
661 write_lock_bh(&call
->state_lock
);
662 ret
= __rxrpc_call_completed(call
);
663 write_unlock_bh(&call
->state_lock
);
668 * Record that a call is locally aborted.
670 static inline bool __rxrpc_abort_call(const char *why
, struct rxrpc_call
*call
,
672 u32 abort_code
, int error
)
674 trace_rxrpc_abort(why
, call
->cid
, call
->call_id
, seq
,
676 return __rxrpc_set_call_completion(call
, RXRPC_CALL_LOCALLY_ABORTED
,
680 static inline bool rxrpc_abort_call(const char *why
, struct rxrpc_call
*call
,
681 rxrpc_seq_t seq
, u32 abort_code
, int error
)
685 write_lock_bh(&call
->state_lock
);
686 ret
= __rxrpc_abort_call(why
, call
, seq
, abort_code
, error
);
687 write_unlock_bh(&call
->state_lock
);
694 extern unsigned int rxrpc_max_client_connections
;
695 extern unsigned int rxrpc_reap_client_connections
;
696 extern unsigned int rxrpc_conn_idle_client_expiry
;
697 extern unsigned int rxrpc_conn_idle_client_fast_expiry
;
698 extern struct idr rxrpc_client_conn_ids
;
700 void rxrpc_destroy_client_conn_ids(void);
701 int rxrpc_connect_call(struct rxrpc_call
*, struct rxrpc_conn_parameters
*,
702 struct sockaddr_rxrpc
*, gfp_t
);
703 void rxrpc_expose_client_call(struct rxrpc_call
*);
704 void rxrpc_disconnect_client_call(struct rxrpc_call
*);
705 void rxrpc_put_client_conn(struct rxrpc_connection
*);
706 void __exit
rxrpc_destroy_all_client_connections(void);
711 void rxrpc_process_connection(struct work_struct
*);
716 extern unsigned int rxrpc_connection_expiry
;
717 extern struct list_head rxrpc_connections
;
718 extern struct list_head rxrpc_connection_proc_list
;
719 extern rwlock_t rxrpc_connection_lock
;
721 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc
*, struct sk_buff
*);
722 struct rxrpc_connection
*rxrpc_alloc_connection(gfp_t
);
723 struct rxrpc_connection
*rxrpc_find_connection_rcu(struct rxrpc_local
*,
725 void __rxrpc_disconnect_call(struct rxrpc_connection
*, struct rxrpc_call
*);
726 void rxrpc_disconnect_call(struct rxrpc_call
*);
727 void rxrpc_kill_connection(struct rxrpc_connection
*);
728 void __rxrpc_put_connection(struct rxrpc_connection
*);
729 void __exit
rxrpc_destroy_all_connections(void);
731 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection
*conn
)
733 return conn
->out_clientflag
;
736 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection
*conn
)
738 return !rxrpc_conn_is_client(conn
);
741 static inline void rxrpc_get_connection(struct rxrpc_connection
*conn
)
743 atomic_inc(&conn
->usage
);
747 struct rxrpc_connection
*rxrpc_get_connection_maybe(struct rxrpc_connection
*conn
)
749 return atomic_inc_not_zero(&conn
->usage
) ? conn
: NULL
;
752 static inline void rxrpc_put_connection(struct rxrpc_connection
*conn
)
757 if (rxrpc_conn_is_client(conn
)) {
758 if (atomic_dec_and_test(&conn
->usage
))
759 rxrpc_put_client_conn(conn
);
761 if (atomic_dec_return(&conn
->usage
) == 1)
762 __rxrpc_put_connection(conn
);
766 static inline bool rxrpc_queue_conn(struct rxrpc_connection
*conn
)
768 if (!rxrpc_get_connection_maybe(conn
))
770 if (!rxrpc_queue_work(&conn
->processor
))
771 rxrpc_put_connection(conn
);
778 struct rxrpc_connection
*rxrpc_find_service_conn_rcu(struct rxrpc_peer
*,
780 struct rxrpc_connection
*rxrpc_prealloc_service_connection(gfp_t
);
781 void rxrpc_new_incoming_connection(struct rxrpc_connection
*, struct sk_buff
*);
782 void rxrpc_unpublish_service_conn(struct rxrpc_connection
*);
787 void rxrpc_data_ready(struct sock
*);
792 extern const struct rxrpc_security rxrpc_no_security
;
797 extern struct key_type key_type_rxrpc
;
798 extern struct key_type key_type_rxrpc_s
;
800 int rxrpc_request_key(struct rxrpc_sock
*, char __user
*, int);
801 int rxrpc_server_keyring(struct rxrpc_sock
*, char __user
*, int);
802 int rxrpc_get_server_data_key(struct rxrpc_connection
*, const void *, time_t,
808 extern void rxrpc_process_local_events(struct rxrpc_local
*);
813 struct rxrpc_local
*rxrpc_lookup_local(const struct sockaddr_rxrpc
*);
814 void __rxrpc_put_local(struct rxrpc_local
*);
815 void __exit
rxrpc_destroy_all_locals(void);
817 static inline void rxrpc_get_local(struct rxrpc_local
*local
)
819 atomic_inc(&local
->usage
);
823 struct rxrpc_local
*rxrpc_get_local_maybe(struct rxrpc_local
*local
)
825 return atomic_inc_not_zero(&local
->usage
) ? local
: NULL
;
828 static inline void rxrpc_put_local(struct rxrpc_local
*local
)
830 if (local
&& atomic_dec_and_test(&local
->usage
))
831 __rxrpc_put_local(local
);
834 static inline void rxrpc_queue_local(struct rxrpc_local
*local
)
836 rxrpc_queue_work(&local
->processor
);
842 extern unsigned int rxrpc_max_backlog __read_mostly
;
843 extern unsigned int rxrpc_requested_ack_delay
;
844 extern unsigned int rxrpc_soft_ack_delay
;
845 extern unsigned int rxrpc_idle_ack_delay
;
846 extern unsigned int rxrpc_rx_window_size
;
847 extern unsigned int rxrpc_rx_mtu
;
848 extern unsigned int rxrpc_rx_jumbo_max
;
849 extern unsigned int rxrpc_resend_timeout
;
851 extern const char *const rxrpc_pkts
[];
852 extern const s8 rxrpc_ack_priority
[];
854 extern const char *rxrpc_acks(u8 reason
);
859 int rxrpc_send_call_packet(struct rxrpc_call
*, u8
);
860 int rxrpc_send_data_packet(struct rxrpc_connection
*, struct sk_buff
*);
861 void rxrpc_reject_packets(struct rxrpc_local
*);
866 void rxrpc_error_report(struct sock
*);
867 void rxrpc_peer_error_distributor(struct work_struct
*);
872 struct rxrpc_peer
*rxrpc_lookup_peer_rcu(struct rxrpc_local
*,
873 const struct sockaddr_rxrpc
*);
874 struct rxrpc_peer
*rxrpc_lookup_peer(struct rxrpc_local
*,
875 struct sockaddr_rxrpc
*, gfp_t
);
876 struct rxrpc_peer
*rxrpc_alloc_peer(struct rxrpc_local
*, gfp_t
);
877 struct rxrpc_peer
*rxrpc_lookup_incoming_peer(struct rxrpc_local
*,
878 struct rxrpc_peer
*);
880 static inline struct rxrpc_peer
*rxrpc_get_peer(struct rxrpc_peer
*peer
)
882 atomic_inc(&peer
->usage
);
887 struct rxrpc_peer
*rxrpc_get_peer_maybe(struct rxrpc_peer
*peer
)
889 return atomic_inc_not_zero(&peer
->usage
) ? peer
: NULL
;
892 extern void __rxrpc_put_peer(struct rxrpc_peer
*peer
);
893 static inline void rxrpc_put_peer(struct rxrpc_peer
*peer
)
895 if (peer
&& atomic_dec_and_test(&peer
->usage
))
896 __rxrpc_put_peer(peer
);
902 extern const struct file_operations rxrpc_call_seq_fops
;
903 extern const struct file_operations rxrpc_connection_seq_fops
;
908 void rxrpc_notify_socket(struct rxrpc_call
*);
909 int rxrpc_recvmsg(struct socket
*, struct msghdr
*, size_t, int);
915 extern const struct rxrpc_security rxkad
;
921 int __init
rxrpc_init_security(void);
922 void rxrpc_exit_security(void);
923 int rxrpc_init_client_conn_security(struct rxrpc_connection
*);
924 int rxrpc_init_server_conn_security(struct rxrpc_connection
*);
929 int rxrpc_do_sendmsg(struct rxrpc_sock
*, struct msghdr
*, size_t);
934 void rxrpc_kernel_data_consumed(struct rxrpc_call
*, struct sk_buff
*);
935 void rxrpc_packet_destructor(struct sk_buff
*);
936 void rxrpc_new_skb(struct sk_buff
*);
937 void rxrpc_see_skb(struct sk_buff
*);
938 void rxrpc_get_skb(struct sk_buff
*);
939 void rxrpc_free_skb(struct sk_buff
*);
940 void rxrpc_purge_queue(struct sk_buff_head
*);
946 extern int __init
rxrpc_sysctl_init(void);
947 extern void rxrpc_sysctl_exit(void);
949 static inline int __init
rxrpc_sysctl_init(void) { return 0; }
950 static inline void rxrpc_sysctl_exit(void) {}
956 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc
*, struct sk_buff
*);
958 static inline bool before(u32 seq1
, u32 seq2
)
960 return (s32
)(seq1
- seq2
) < 0;
962 static inline bool before_eq(u32 seq1
, u32 seq2
)
964 return (s32
)(seq1
- seq2
) <= 0;
966 static inline bool after(u32 seq1
, u32 seq2
)
968 return (s32
)(seq1
- seq2
) > 0;
970 static inline bool after_eq(u32 seq1
, u32 seq2
)
972 return (s32
)(seq1
- seq2
) >= 0;
978 extern unsigned int rxrpc_debug
;
980 #define dbgprintk(FMT,...) \
981 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
983 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
984 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
985 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
986 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
987 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
990 #if defined(__KDEBUG)
991 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
992 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
993 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
994 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
995 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
997 #elif defined(CONFIG_AF_RXRPC_DEBUG)
998 #define RXRPC_DEBUG_KENTER 0x01
999 #define RXRPC_DEBUG_KLEAVE 0x02
1000 #define RXRPC_DEBUG_KDEBUG 0x04
1001 #define RXRPC_DEBUG_KPROTO 0x08
1002 #define RXRPC_DEBUG_KNET 0x10
1004 #define _enter(FMT,...) \
1006 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1007 kenter(FMT,##__VA_ARGS__); \
1010 #define _leave(FMT,...) \
1012 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1013 kleave(FMT,##__VA_ARGS__); \
1016 #define _debug(FMT,...) \
1018 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1019 kdebug(FMT,##__VA_ARGS__); \
1022 #define _proto(FMT,...) \
1024 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1025 kproto(FMT,##__VA_ARGS__); \
1028 #define _net(FMT,...) \
1030 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1031 knet(FMT,##__VA_ARGS__); \
1035 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1036 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1037 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1038 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1039 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1043 * debug assertion checking
1045 #if 1 // defined(__KDEBUGALL)
1049 if (unlikely(!(X))) { \
1050 pr_err("Assertion failed\n"); \
1055 #define ASSERTCMP(X, OP, Y) \
1057 __typeof__(X) _x = (X); \
1058 __typeof__(Y) _y = (__typeof__(X))(Y); \
1059 if (unlikely(!(_x OP _y))) { \
1060 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1061 (unsigned long)_x, (unsigned long)_x, #OP, \
1062 (unsigned long)_y, (unsigned long)_y); \
1067 #define ASSERTIF(C, X) \
1069 if (unlikely((C) && !(X))) { \
1070 pr_err("Assertion failed\n"); \
1075 #define ASSERTIFCMP(C, X, OP, Y) \
1077 __typeof__(X) _x = (X); \
1078 __typeof__(Y) _y = (__typeof__(X))(Y); \
1079 if (unlikely((C) && !(_x OP _y))) { \
1080 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1081 (unsigned long)_x, (unsigned long)_x, #OP, \
1082 (unsigned long)_y, (unsigned long)_y); \
1093 #define ASSERTCMP(X, OP, Y) \
1097 #define ASSERTIF(C, X) \
1101 #define ASSERTIFCMP(C, X, OP, Y) \
1105 #endif /* __KDEBUGALL */