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rxrpc: Fix loss of PING RESPONSE ACK production due to PING ACKs
[mirror_ubuntu-jammy-kernel.git] / net / rxrpc / ar-internal.h
1 /* AF_RXRPC internal definitions
2 *
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
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.
10 */
11
12 #include <linux/atomic.h>
13 #include <linux/seqlock.h>
14 #include <net/sock.h>
15 #include <net/af_rxrpc.h>
16 #include <rxrpc/packet.h>
17
18 #if 0
19 #define CHECK_SLAB_OKAY(X) \
20 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
21 (POISON_FREE << 8 | POISON_FREE))
22 #else
23 #define CHECK_SLAB_OKAY(X) do {} while (0)
24 #endif
25
26 #define FCRYPT_BSIZE 8
27 struct rxrpc_crypt {
28 union {
29 u8 x[FCRYPT_BSIZE];
30 __be32 n[2];
31 };
32 } __attribute__((aligned(8)));
33
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))
37
38 struct rxrpc_connection;
39
40 /*
41 * Mark applied to socket buffers.
42 */
43 enum rxrpc_skb_mark {
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 */
52 };
53
54 /*
55 * sk_state for RxRPC sockets
56 */
57 enum {
58 RXRPC_UNBOUND = 0,
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 */
64 };
65
66 /*
67 * Service backlog preallocation.
68 *
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.
73 */
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];
85 };
86
87 /*
88 * RxRPC socket definition
89 */
90 struct rxrpc_sock {
91 /* WARNING: sk has to be the first member */
92 struct sock sk;
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 rxrpc_backlog *backlog; /* Preallocation for services */
97 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
98 struct list_head sock_calls; /* List of calls owned by this socket */
99 struct list_head to_be_accepted; /* calls awaiting acceptance */
100 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
101 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
102 struct key *key; /* security for this socket */
103 struct key *securities; /* list of server security descriptors */
104 struct rb_root calls; /* User ID -> call mapping */
105 unsigned long flags;
106 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
107 rwlock_t call_lock; /* lock for calls */
108 u32 min_sec_level; /* minimum security level */
109 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
110 bool exclusive; /* Exclusive connection for a client socket */
111 sa_family_t family; /* Protocol family created with */
112 struct sockaddr_rxrpc srx; /* local address */
113 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
114 };
115
116 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
117
118 /*
119 * CPU-byteorder normalised Rx packet header.
120 */
121 struct rxrpc_host_header {
122 u32 epoch; /* client boot timestamp */
123 u32 cid; /* connection and channel ID */
124 u32 callNumber; /* call ID (0 for connection-level packets) */
125 u32 seq; /* sequence number of pkt in call stream */
126 u32 serial; /* serial number of pkt sent to network */
127 u8 type; /* packet type */
128 u8 flags; /* packet flags */
129 u8 userStatus; /* app-layer defined status */
130 u8 securityIndex; /* security protocol ID */
131 union {
132 u16 _rsvd; /* reserved */
133 u16 cksum; /* kerberos security checksum */
134 };
135 u16 serviceId; /* service ID */
136 } __packed;
137
138 /*
139 * RxRPC socket buffer private variables
140 * - max 48 bytes (struct sk_buff::cb)
141 */
142 struct rxrpc_skb_priv {
143 union {
144 u8 nr_jumbo; /* Number of jumbo subpackets */
145 };
146 union {
147 int remain; /* amount of space remaining for next write */
148 };
149
150 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
151 };
152
153 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
154
155 /*
156 * RxRPC security module interface
157 */
158 struct rxrpc_security {
159 const char *name; /* name of this service */
160 u8 security_index; /* security type provided */
161
162 /* Initialise a security service */
163 int (*init)(void);
164
165 /* Clean up a security service */
166 void (*exit)(void);
167
168 /* initialise a connection's security */
169 int (*init_connection_security)(struct rxrpc_connection *);
170
171 /* prime a connection's packet security */
172 int (*prime_packet_security)(struct rxrpc_connection *);
173
174 /* impose security on a packet */
175 int (*secure_packet)(struct rxrpc_call *,
176 struct sk_buff *,
177 size_t,
178 void *);
179
180 /* verify the security on a received packet */
181 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
182 unsigned int, unsigned int, rxrpc_seq_t, u16);
183
184 /* Locate the data in a received packet that has been verified. */
185 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
186 unsigned int *, unsigned int *);
187
188 /* issue a challenge */
189 int (*issue_challenge)(struct rxrpc_connection *);
190
191 /* respond to a challenge */
192 int (*respond_to_challenge)(struct rxrpc_connection *,
193 struct sk_buff *,
194 u32 *);
195
196 /* verify a response */
197 int (*verify_response)(struct rxrpc_connection *,
198 struct sk_buff *,
199 u32 *);
200
201 /* clear connection security */
202 void (*clear)(struct rxrpc_connection *);
203 };
204
205 /*
206 * RxRPC local transport endpoint description
207 * - owned by a single AF_RXRPC socket
208 * - pointed to by transport socket struct sk_user_data
209 */
210 struct rxrpc_local {
211 struct rcu_head rcu;
212 atomic_t usage;
213 struct list_head link;
214 struct socket *socket; /* my UDP socket */
215 struct work_struct processor;
216 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
217 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
218 struct sk_buff_head reject_queue; /* packets awaiting rejection */
219 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
220 struct rb_root client_conns; /* Client connections by socket params */
221 spinlock_t client_conns_lock; /* Lock for client_conns */
222 spinlock_t lock; /* access lock */
223 rwlock_t services_lock; /* lock for services list */
224 int debug_id; /* debug ID for printks */
225 bool dead;
226 struct sockaddr_rxrpc srx; /* local address */
227 };
228
229 /*
230 * RxRPC remote transport endpoint definition
231 * - matched by local endpoint, remote port, address and protocol type
232 */
233 struct rxrpc_peer {
234 struct rcu_head rcu; /* This must be first */
235 atomic_t usage;
236 unsigned long hash_key;
237 struct hlist_node hash_link;
238 struct rxrpc_local *local;
239 struct hlist_head error_targets; /* targets for net error distribution */
240 struct work_struct error_distributor;
241 struct rb_root service_conns; /* Service connections */
242 seqlock_t service_conn_lock;
243 spinlock_t lock; /* access lock */
244 unsigned int if_mtu; /* interface MTU for this peer */
245 unsigned int mtu; /* network MTU for this peer */
246 unsigned int maxdata; /* data size (MTU - hdrsize) */
247 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
248 int debug_id; /* debug ID for printks */
249 int error_report; /* Net (+0) or local (+1000000) to distribute */
250 #define RXRPC_LOCAL_ERROR_OFFSET 1000000
251 struct sockaddr_rxrpc srx; /* remote address */
252
253 /* calculated RTT cache */
254 #define RXRPC_RTT_CACHE_SIZE 32
255 ktime_t rtt_last_req; /* Time of last RTT request */
256 u64 rtt; /* Current RTT estimate (in nS) */
257 u64 rtt_sum; /* Sum of cache contents */
258 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
259 u8 rtt_cursor; /* next entry at which to insert */
260 u8 rtt_usage; /* amount of cache actually used */
261 };
262
263 /*
264 * Keys for matching a connection.
265 */
266 struct rxrpc_conn_proto {
267 union {
268 struct {
269 u32 epoch; /* epoch of this connection */
270 u32 cid; /* connection ID */
271 };
272 u64 index_key;
273 };
274 };
275
276 struct rxrpc_conn_parameters {
277 struct rxrpc_local *local; /* Representation of local endpoint */
278 struct rxrpc_peer *peer; /* Remote endpoint */
279 struct key *key; /* Security details */
280 bool exclusive; /* T if conn is exclusive */
281 u16 service_id; /* Service ID for this connection */
282 u32 security_level; /* Security level selected */
283 };
284
285 /*
286 * Bits in the connection flags.
287 */
288 enum rxrpc_conn_flag {
289 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
290 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
291 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
292 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */
293 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
294 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
295 };
296
297 /*
298 * Events that can be raised upon a connection.
299 */
300 enum rxrpc_conn_event {
301 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
302 };
303
304 /*
305 * The connection cache state.
306 */
307 enum rxrpc_conn_cache_state {
308 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */
309 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */
310 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
311 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
312 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
313 RXRPC_CONN__NR_CACHE_STATES
314 };
315
316 /*
317 * The connection protocol state.
318 */
319 enum rxrpc_conn_proto_state {
320 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
321 RXRPC_CONN_CLIENT, /* Client connection */
322 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
323 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
324 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
325 RXRPC_CONN_SERVICE, /* Service secured connection */
326 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
327 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
328 RXRPC_CONN__NR_STATES
329 };
330
331 /*
332 * RxRPC connection definition
333 * - matched by { local, peer, epoch, conn_id, direction }
334 * - each connection can only handle four simultaneous calls
335 */
336 struct rxrpc_connection {
337 struct rxrpc_conn_proto proto;
338 struct rxrpc_conn_parameters params;
339
340 atomic_t usage;
341 struct rcu_head rcu;
342 struct list_head cache_link;
343
344 spinlock_t channel_lock;
345 unsigned char active_chans; /* Mask of active channels */
346 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
347 struct list_head waiting_calls; /* Calls waiting for channels */
348 struct rxrpc_channel {
349 struct rxrpc_call __rcu *call; /* Active call */
350 u32 call_id; /* ID of current call */
351 u32 call_counter; /* Call ID counter */
352 u32 last_call; /* ID of last call */
353 u8 last_type; /* Type of last packet */
354 u16 last_service_id;
355 union {
356 u32 last_seq;
357 u32 last_abort;
358 };
359 } channels[RXRPC_MAXCALLS];
360
361 struct work_struct processor; /* connection event processor */
362 union {
363 struct rb_node client_node; /* Node in local->client_conns */
364 struct rb_node service_node; /* Node in peer->service_conns */
365 };
366 struct list_head proc_link; /* link in procfs list */
367 struct list_head link; /* link in master connection list */
368 struct sk_buff_head rx_queue; /* received conn-level packets */
369 const struct rxrpc_security *security; /* applied security module */
370 struct key *server_key; /* security for this service */
371 struct crypto_skcipher *cipher; /* encryption handle */
372 struct rxrpc_crypt csum_iv; /* packet checksum base */
373 unsigned long flags;
374 unsigned long events;
375 unsigned long idle_timestamp; /* Time at which last became idle */
376 spinlock_t state_lock; /* state-change lock */
377 enum rxrpc_conn_cache_state cache_state;
378 enum rxrpc_conn_proto_state state; /* current state of connection */
379 u32 local_abort; /* local abort code */
380 u32 remote_abort; /* remote abort code */
381 int debug_id; /* debug ID for printks */
382 atomic_t serial; /* packet serial number counter */
383 unsigned int hi_serial; /* highest serial number received */
384 u32 security_nonce; /* response re-use preventer */
385 u8 size_align; /* data size alignment (for security) */
386 u8 security_size; /* security header size */
387 u8 security_ix; /* security type */
388 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
389 };
390
391 /*
392 * Flags in call->flags.
393 */
394 enum rxrpc_call_flag {
395 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
396 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
397 RXRPC_CALL_IS_SERVICE, /* Call is service call */
398 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
399 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
400 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
401 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
402 RXRPC_CALL_PINGING, /* Ping in process */
403 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
404 };
405
406 /*
407 * Events that can be raised on a call.
408 */
409 enum rxrpc_call_event {
410 RXRPC_CALL_EV_ACK, /* need to generate ACK */
411 RXRPC_CALL_EV_ABORT, /* need to generate abort */
412 RXRPC_CALL_EV_TIMER, /* Timer expired */
413 RXRPC_CALL_EV_RESEND, /* Tx resend required */
414 RXRPC_CALL_EV_PING, /* Ping send required */
415 };
416
417 /*
418 * The states that a call can be in.
419 */
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
435 };
436
437 /*
438 * Call completion condition (state == RXRPC_CALL_COMPLETE).
439 */
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
447 };
448
449 /*
450 * Call Tx congestion management modes.
451 */
452 enum rxrpc_congest_mode {
453 RXRPC_CALL_SLOW_START,
454 RXRPC_CALL_CONGEST_AVOIDANCE,
455 RXRPC_CALL_PACKET_LOSS,
456 RXRPC_CALL_FAST_RETRANSMIT,
457 NR__RXRPC_CONGEST_MODES
458 };
459
460 /*
461 * RxRPC call definition
462 * - matched by { connection, call_id }
463 */
464 struct rxrpc_call {
465 struct rcu_head rcu;
466 struct rxrpc_connection *conn; /* connection carrying call */
467 struct rxrpc_peer *peer; /* Peer record for remote address */
468 struct rxrpc_sock __rcu *socket; /* socket responsible */
469 ktime_t ack_at; /* When deferred ACK needs to happen */
470 ktime_t resend_at; /* When next resend needs to happen */
471 ktime_t ping_at; /* When next to send a ping */
472 ktime_t expire_at; /* When the call times out */
473 struct timer_list timer; /* Combined event timer */
474 struct work_struct processor; /* Event processor */
475 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
476 struct list_head link; /* link in master call list */
477 struct list_head chan_wait_link; /* Link in conn->waiting_calls */
478 struct hlist_node error_link; /* link in error distribution list */
479 struct list_head accept_link; /* Link in rx->acceptq */
480 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
481 struct list_head sock_link; /* Link in rx->sock_calls */
482 struct rb_node sock_node; /* Node in rx->calls */
483 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
484 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
485 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
486 unsigned long user_call_ID; /* user-defined call ID */
487 unsigned long flags;
488 unsigned long events;
489 spinlock_t lock;
490 rwlock_t state_lock; /* lock for state transition */
491 u32 abort_code; /* Local/remote abort code */
492 int error; /* Local error incurred */
493 enum rxrpc_call_state state; /* current state of call */
494 enum rxrpc_call_completion completion; /* Call completion condition */
495 atomic_t usage;
496 u16 service_id; /* service ID */
497 u8 security_ix; /* Security type */
498 u32 call_id; /* call ID on connection */
499 u32 cid; /* connection ID plus channel index */
500 int debug_id; /* debug ID for printks */
501 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
502 unsigned short rx_pkt_len; /* Current recvmsg packet len */
503
504 /* Rx/Tx circular buffer, depending on phase.
505 *
506 * In the Rx phase, packets are annotated with 0 or the number of the
507 * segment of a jumbo packet each buffer refers to. There can be up to
508 * 47 segments in a maximum-size UDP packet.
509 *
510 * In the Tx phase, packets are annotated with which buffers have been
511 * acked.
512 */
513 #define RXRPC_RXTX_BUFF_SIZE 64
514 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
515 #define RXRPC_INIT_RX_WINDOW_SIZE 32
516 struct sk_buff **rxtx_buffer;
517 u8 *rxtx_annotations;
518 #define RXRPC_TX_ANNO_ACK 0
519 #define RXRPC_TX_ANNO_UNACK 1
520 #define RXRPC_TX_ANNO_NAK 2
521 #define RXRPC_TX_ANNO_RETRANS 3
522 #define RXRPC_TX_ANNO_MASK 0x03
523 #define RXRPC_TX_ANNO_LAST 0x04
524 #define RXRPC_TX_ANNO_RESENT 0x08
525
526 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */
527 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */
528 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
529 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
530 * not hard-ACK'd packet follows this.
531 */
532 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
533
534 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
535 * is fixed, we keep these numbers in terms of segments (ie. DATA
536 * packets) rather than bytes.
537 */
538 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
539 u8 cong_cwnd; /* Congestion window size */
540 u8 cong_extra; /* Extra to send for congestion management */
541 u8 cong_ssthresh; /* Slow-start threshold */
542 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
543 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
544 u8 cong_cumul_acks; /* Cumulative ACK count */
545 ktime_t cong_tstamp; /* Last time cwnd was changed */
546
547 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
548 * consumed packet follows this.
549 */
550 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
551 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
552 u8 rx_winsize; /* Size of Rx window */
553 u8 tx_winsize; /* Maximum size of Tx window */
554 bool tx_phase; /* T if transmission phase, F if receive phase */
555 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
556
557 /* receive-phase ACK management */
558 u8 ackr_reason; /* reason to ACK */
559 u16 ackr_skew; /* skew on packet being ACK'd */
560 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
561 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
562 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
563 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
564
565 /* ping management */
566 rxrpc_serial_t ping_serial; /* Last ping sent */
567 ktime_t ping_time; /* Time last ping sent */
568
569 /* transmission-phase ACK management */
570 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
571 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
572 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
573 };
574
575 /*
576 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
577 */
578 struct rxrpc_ack_summary {
579 u8 ack_reason;
580 u8 nr_acks; /* Number of ACKs in packet */
581 u8 nr_nacks; /* Number of NACKs in packet */
582 u8 nr_new_acks; /* Number of new ACKs in packet */
583 u8 nr_new_nacks; /* Number of new NACKs in packet */
584 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
585 bool new_low_nack; /* T if new low NACK found */
586 bool retrans_timeo; /* T if reTx due to timeout happened */
587 u8 flight_size; /* Number of unreceived transmissions */
588 /* Place to stash values for tracing */
589 enum rxrpc_congest_mode mode:8;
590 u8 cwnd;
591 u8 ssthresh;
592 u8 dup_acks;
593 u8 cumulative_acks;
594 };
595
596 enum rxrpc_skb_trace {
597 rxrpc_skb_rx_cleaned,
598 rxrpc_skb_rx_freed,
599 rxrpc_skb_rx_got,
600 rxrpc_skb_rx_lost,
601 rxrpc_skb_rx_received,
602 rxrpc_skb_rx_rotated,
603 rxrpc_skb_rx_purged,
604 rxrpc_skb_rx_seen,
605 rxrpc_skb_tx_cleaned,
606 rxrpc_skb_tx_freed,
607 rxrpc_skb_tx_got,
608 rxrpc_skb_tx_new,
609 rxrpc_skb_tx_rotated,
610 rxrpc_skb_tx_seen,
611 rxrpc_skb__nr_trace
612 };
613
614 extern const char rxrpc_skb_traces[rxrpc_skb__nr_trace][7];
615
616 enum rxrpc_conn_trace {
617 rxrpc_conn_new_client,
618 rxrpc_conn_new_service,
619 rxrpc_conn_queued,
620 rxrpc_conn_seen,
621 rxrpc_conn_got,
622 rxrpc_conn_put_client,
623 rxrpc_conn_put_service,
624 rxrpc_conn__nr_trace
625 };
626
627 extern const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4];
628
629 enum rxrpc_client_trace {
630 rxrpc_client_activate_chans,
631 rxrpc_client_alloc,
632 rxrpc_client_chan_activate,
633 rxrpc_client_chan_disconnect,
634 rxrpc_client_chan_pass,
635 rxrpc_client_chan_unstarted,
636 rxrpc_client_cleanup,
637 rxrpc_client_count,
638 rxrpc_client_discard,
639 rxrpc_client_duplicate,
640 rxrpc_client_exposed,
641 rxrpc_client_replace,
642 rxrpc_client_to_active,
643 rxrpc_client_to_culled,
644 rxrpc_client_to_idle,
645 rxrpc_client_to_inactive,
646 rxrpc_client_to_waiting,
647 rxrpc_client_uncount,
648 rxrpc_client__nr_trace
649 };
650
651 extern const char rxrpc_client_traces[rxrpc_client__nr_trace][7];
652 extern const char rxrpc_conn_cache_states[RXRPC_CONN__NR_CACHE_STATES][5];
653
654 enum rxrpc_call_trace {
655 rxrpc_call_new_client,
656 rxrpc_call_new_service,
657 rxrpc_call_queued,
658 rxrpc_call_queued_ref,
659 rxrpc_call_seen,
660 rxrpc_call_connected,
661 rxrpc_call_release,
662 rxrpc_call_got,
663 rxrpc_call_got_userid,
664 rxrpc_call_got_kernel,
665 rxrpc_call_put,
666 rxrpc_call_put_userid,
667 rxrpc_call_put_kernel,
668 rxrpc_call_put_noqueue,
669 rxrpc_call_error,
670 rxrpc_call__nr_trace
671 };
672
673 extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4];
674
675 enum rxrpc_transmit_trace {
676 rxrpc_transmit_wait,
677 rxrpc_transmit_queue,
678 rxrpc_transmit_queue_last,
679 rxrpc_transmit_rotate,
680 rxrpc_transmit_rotate_last,
681 rxrpc_transmit_await_reply,
682 rxrpc_transmit_end,
683 rxrpc_transmit__nr_trace
684 };
685
686 extern const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4];
687
688 enum rxrpc_receive_trace {
689 rxrpc_receive_incoming,
690 rxrpc_receive_queue,
691 rxrpc_receive_queue_last,
692 rxrpc_receive_front,
693 rxrpc_receive_rotate,
694 rxrpc_receive_end,
695 rxrpc_receive__nr_trace
696 };
697
698 extern const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4];
699
700 enum rxrpc_recvmsg_trace {
701 rxrpc_recvmsg_enter,
702 rxrpc_recvmsg_wait,
703 rxrpc_recvmsg_dequeue,
704 rxrpc_recvmsg_hole,
705 rxrpc_recvmsg_next,
706 rxrpc_recvmsg_cont,
707 rxrpc_recvmsg_full,
708 rxrpc_recvmsg_data_return,
709 rxrpc_recvmsg_terminal,
710 rxrpc_recvmsg_to_be_accepted,
711 rxrpc_recvmsg_return,
712 rxrpc_recvmsg__nr_trace
713 };
714
715 extern const char rxrpc_recvmsg_traces[rxrpc_recvmsg__nr_trace][5];
716
717 enum rxrpc_rtt_tx_trace {
718 rxrpc_rtt_tx_ping,
719 rxrpc_rtt_tx_data,
720 rxrpc_rtt_tx__nr_trace
721 };
722
723 extern const char rxrpc_rtt_tx_traces[rxrpc_rtt_tx__nr_trace][5];
724
725 enum rxrpc_rtt_rx_trace {
726 rxrpc_rtt_rx_ping_response,
727 rxrpc_rtt_rx_requested_ack,
728 rxrpc_rtt_rx__nr_trace
729 };
730
731 extern const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5];
732
733 enum rxrpc_timer_trace {
734 rxrpc_timer_begin,
735 rxrpc_timer_init_for_reply,
736 rxrpc_timer_expired,
737 rxrpc_timer_set_for_ack,
738 rxrpc_timer_set_for_ping,
739 rxrpc_timer_set_for_resend,
740 rxrpc_timer_set_for_send,
741 rxrpc_timer__nr_trace
742 };
743
744 extern const char rxrpc_timer_traces[rxrpc_timer__nr_trace][8];
745
746 enum rxrpc_propose_ack_trace {
747 rxrpc_propose_ack_client_tx_end,
748 rxrpc_propose_ack_input_data,
749 rxrpc_propose_ack_ping_for_lost_ack,
750 rxrpc_propose_ack_ping_for_lost_reply,
751 rxrpc_propose_ack_ping_for_params,
752 rxrpc_propose_ack_respond_to_ack,
753 rxrpc_propose_ack_respond_to_ping,
754 rxrpc_propose_ack_retry_tx,
755 rxrpc_propose_ack_rotate_rx,
756 rxrpc_propose_ack_terminal_ack,
757 rxrpc_propose_ack__nr_trace
758 };
759
760 enum rxrpc_propose_ack_outcome {
761 rxrpc_propose_ack_use,
762 rxrpc_propose_ack_update,
763 rxrpc_propose_ack_subsume,
764 rxrpc_propose_ack__nr_outcomes
765 };
766
767 extern const char rxrpc_propose_ack_traces[rxrpc_propose_ack__nr_trace][8];
768 extern const char *const rxrpc_propose_ack_outcomes[rxrpc_propose_ack__nr_outcomes];
769
770 enum rxrpc_congest_change {
771 rxrpc_cong_begin_retransmission,
772 rxrpc_cong_cleared_nacks,
773 rxrpc_cong_new_low_nack,
774 rxrpc_cong_no_change,
775 rxrpc_cong_progress,
776 rxrpc_cong_retransmit_again,
777 rxrpc_cong_rtt_window_end,
778 rxrpc_cong_saw_nack,
779 rxrpc_congest__nr_change
780 };
781
782 extern const char rxrpc_congest_modes[NR__RXRPC_CONGEST_MODES][10];
783 extern const char rxrpc_congest_changes[rxrpc_congest__nr_change][9];
784
785 extern const char *const rxrpc_pkts[];
786 extern const char rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4];
787
788 #include <trace/events/rxrpc.h>
789
790 /*
791 * af_rxrpc.c
792 */
793 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
794 extern u32 rxrpc_epoch;
795 extern atomic_t rxrpc_debug_id;
796 extern struct workqueue_struct *rxrpc_workqueue;
797
798 /*
799 * call_accept.c
800 */
801 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
802 void rxrpc_discard_prealloc(struct rxrpc_sock *);
803 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
804 struct rxrpc_connection *,
805 struct sk_buff *);
806 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
807 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
808 rxrpc_notify_rx_t);
809 int rxrpc_reject_call(struct rxrpc_sock *);
810
811 /*
812 * call_event.c
813 */
814 void rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
815 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
816 enum rxrpc_propose_ack_trace);
817 void rxrpc_process_call(struct work_struct *);
818
819 /*
820 * call_object.c
821 */
822 extern const char *const rxrpc_call_states[];
823 extern const char *const rxrpc_call_completions[];
824 extern unsigned int rxrpc_max_call_lifetime;
825 extern struct kmem_cache *rxrpc_call_jar;
826 extern struct list_head rxrpc_calls;
827 extern rwlock_t rxrpc_call_lock;
828
829 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
830 struct rxrpc_call *rxrpc_alloc_call(gfp_t);
831 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
832 struct rxrpc_conn_parameters *,
833 struct sockaddr_rxrpc *,
834 unsigned long, gfp_t);
835 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
836 struct sk_buff *);
837 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
838 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
839 bool __rxrpc_queue_call(struct rxrpc_call *);
840 bool rxrpc_queue_call(struct rxrpc_call *);
841 void rxrpc_see_call(struct rxrpc_call *);
842 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
843 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
844 void rxrpc_cleanup_call(struct rxrpc_call *);
845 void __exit rxrpc_destroy_all_calls(void);
846
847 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
848 {
849 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
850 }
851
852 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
853 {
854 return !rxrpc_is_service_call(call);
855 }
856
857 /*
858 * Transition a call to the complete state.
859 */
860 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
861 enum rxrpc_call_completion compl,
862 u32 abort_code,
863 int error)
864 {
865 if (call->state < RXRPC_CALL_COMPLETE) {
866 call->abort_code = abort_code;
867 call->error = error;
868 call->completion = compl,
869 call->state = RXRPC_CALL_COMPLETE;
870 wake_up(&call->waitq);
871 return true;
872 }
873 return false;
874 }
875
876 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
877 enum rxrpc_call_completion compl,
878 u32 abort_code,
879 int error)
880 {
881 bool ret;
882
883 write_lock_bh(&call->state_lock);
884 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
885 write_unlock_bh(&call->state_lock);
886 return ret;
887 }
888
889 /*
890 * Record that a call successfully completed.
891 */
892 static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
893 {
894 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
895 }
896
897 static inline bool rxrpc_call_completed(struct rxrpc_call *call)
898 {
899 bool ret;
900
901 write_lock_bh(&call->state_lock);
902 ret = __rxrpc_call_completed(call);
903 write_unlock_bh(&call->state_lock);
904 return ret;
905 }
906
907 /*
908 * Record that a call is locally aborted.
909 */
910 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
911 rxrpc_seq_t seq,
912 u32 abort_code, int error)
913 {
914 trace_rxrpc_abort(why, call->cid, call->call_id, seq,
915 abort_code, error);
916 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
917 abort_code, error);
918 }
919
920 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
921 rxrpc_seq_t seq, u32 abort_code, int error)
922 {
923 bool ret;
924
925 write_lock_bh(&call->state_lock);
926 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
927 write_unlock_bh(&call->state_lock);
928 return ret;
929 }
930
931 /*
932 * conn_client.c
933 */
934 extern unsigned int rxrpc_max_client_connections;
935 extern unsigned int rxrpc_reap_client_connections;
936 extern unsigned int rxrpc_conn_idle_client_expiry;
937 extern unsigned int rxrpc_conn_idle_client_fast_expiry;
938 extern struct idr rxrpc_client_conn_ids;
939
940 void rxrpc_destroy_client_conn_ids(void);
941 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
942 struct sockaddr_rxrpc *, gfp_t);
943 void rxrpc_expose_client_call(struct rxrpc_call *);
944 void rxrpc_disconnect_client_call(struct rxrpc_call *);
945 void rxrpc_put_client_conn(struct rxrpc_connection *);
946 void __exit rxrpc_destroy_all_client_connections(void);
947
948 /*
949 * conn_event.c
950 */
951 void rxrpc_process_connection(struct work_struct *);
952
953 /*
954 * conn_object.c
955 */
956 extern unsigned int rxrpc_connection_expiry;
957 extern struct list_head rxrpc_connections;
958 extern struct list_head rxrpc_connection_proc_list;
959 extern rwlock_t rxrpc_connection_lock;
960
961 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
962 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
963 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
964 struct sk_buff *);
965 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
966 void rxrpc_disconnect_call(struct rxrpc_call *);
967 void rxrpc_kill_connection(struct rxrpc_connection *);
968 bool rxrpc_queue_conn(struct rxrpc_connection *);
969 void rxrpc_see_connection(struct rxrpc_connection *);
970 void rxrpc_get_connection(struct rxrpc_connection *);
971 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
972 void rxrpc_put_service_conn(struct rxrpc_connection *);
973 void __exit rxrpc_destroy_all_connections(void);
974
975 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
976 {
977 return conn->out_clientflag;
978 }
979
980 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
981 {
982 return !rxrpc_conn_is_client(conn);
983 }
984
985 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
986 {
987 if (!conn)
988 return;
989
990 if (rxrpc_conn_is_client(conn))
991 rxrpc_put_client_conn(conn);
992 else
993 rxrpc_put_service_conn(conn);
994 }
995
996 /*
997 * conn_service.c
998 */
999 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
1000 struct sk_buff *);
1001 struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t);
1002 void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *);
1003 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
1004
1005 /*
1006 * input.c
1007 */
1008 void rxrpc_data_ready(struct sock *);
1009
1010 /*
1011 * insecure.c
1012 */
1013 extern const struct rxrpc_security rxrpc_no_security;
1014
1015 /*
1016 * key.c
1017 */
1018 extern struct key_type key_type_rxrpc;
1019 extern struct key_type key_type_rxrpc_s;
1020
1021 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
1022 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
1023 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
1024 u32);
1025
1026 /*
1027 * local_event.c
1028 */
1029 extern void rxrpc_process_local_events(struct rxrpc_local *);
1030
1031 /*
1032 * local_object.c
1033 */
1034 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *);
1035 void __rxrpc_put_local(struct rxrpc_local *);
1036 void __exit rxrpc_destroy_all_locals(void);
1037
1038 static inline void rxrpc_get_local(struct rxrpc_local *local)
1039 {
1040 atomic_inc(&local->usage);
1041 }
1042
1043 static inline
1044 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
1045 {
1046 return atomic_inc_not_zero(&local->usage) ? local : NULL;
1047 }
1048
1049 static inline void rxrpc_put_local(struct rxrpc_local *local)
1050 {
1051 if (local && atomic_dec_and_test(&local->usage))
1052 __rxrpc_put_local(local);
1053 }
1054
1055 static inline void rxrpc_queue_local(struct rxrpc_local *local)
1056 {
1057 rxrpc_queue_work(&local->processor);
1058 }
1059
1060 /*
1061 * misc.c
1062 */
1063 extern unsigned int rxrpc_max_backlog __read_mostly;
1064 extern unsigned int rxrpc_requested_ack_delay;
1065 extern unsigned int rxrpc_soft_ack_delay;
1066 extern unsigned int rxrpc_idle_ack_delay;
1067 extern unsigned int rxrpc_rx_window_size;
1068 extern unsigned int rxrpc_rx_mtu;
1069 extern unsigned int rxrpc_rx_jumbo_max;
1070 extern unsigned int rxrpc_resend_timeout;
1071
1072 extern const s8 rxrpc_ack_priority[];
1073
1074 /*
1075 * output.c
1076 */
1077 int rxrpc_send_ack_packet(struct rxrpc_call *, bool);
1078 int rxrpc_send_abort_packet(struct rxrpc_call *);
1079 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
1080 void rxrpc_reject_packets(struct rxrpc_local *);
1081
1082 /*
1083 * peer_event.c
1084 */
1085 void rxrpc_error_report(struct sock *);
1086 void rxrpc_peer_error_distributor(struct work_struct *);
1087 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1088 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1089
1090 /*
1091 * peer_object.c
1092 */
1093 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1094 const struct sockaddr_rxrpc *);
1095 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
1096 struct sockaddr_rxrpc *, gfp_t);
1097 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1098 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *,
1099 struct rxrpc_peer *);
1100
1101 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer)
1102 {
1103 atomic_inc(&peer->usage);
1104 return peer;
1105 }
1106
1107 static inline
1108 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
1109 {
1110 return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
1111 }
1112
1113 extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
1114 static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
1115 {
1116 if (peer && atomic_dec_and_test(&peer->usage))
1117 __rxrpc_put_peer(peer);
1118 }
1119
1120 /*
1121 * proc.c
1122 */
1123 extern const struct file_operations rxrpc_call_seq_fops;
1124 extern const struct file_operations rxrpc_connection_seq_fops;
1125
1126 /*
1127 * recvmsg.c
1128 */
1129 void rxrpc_notify_socket(struct rxrpc_call *);
1130 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1131
1132 /*
1133 * rxkad.c
1134 */
1135 #ifdef CONFIG_RXKAD
1136 extern const struct rxrpc_security rxkad;
1137 #endif
1138
1139 /*
1140 * security.c
1141 */
1142 int __init rxrpc_init_security(void);
1143 void rxrpc_exit_security(void);
1144 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1145 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
1146
1147 /*
1148 * sendmsg.c
1149 */
1150 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1151
1152 /*
1153 * skbuff.c
1154 */
1155 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1156 void rxrpc_packet_destructor(struct sk_buff *);
1157 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1158 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1159 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1160 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1161 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
1162 void rxrpc_purge_queue(struct sk_buff_head *);
1163
1164 /*
1165 * sysctl.c
1166 */
1167 #ifdef CONFIG_SYSCTL
1168 extern int __init rxrpc_sysctl_init(void);
1169 extern void rxrpc_sysctl_exit(void);
1170 #else
1171 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1172 static inline void rxrpc_sysctl_exit(void) {}
1173 #endif
1174
1175 /*
1176 * utils.c
1177 */
1178 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1179
1180 static inline bool before(u32 seq1, u32 seq2)
1181 {
1182 return (s32)(seq1 - seq2) < 0;
1183 }
1184 static inline bool before_eq(u32 seq1, u32 seq2)
1185 {
1186 return (s32)(seq1 - seq2) <= 0;
1187 }
1188 static inline bool after(u32 seq1, u32 seq2)
1189 {
1190 return (s32)(seq1 - seq2) > 0;
1191 }
1192 static inline bool after_eq(u32 seq1, u32 seq2)
1193 {
1194 return (s32)(seq1 - seq2) >= 0;
1195 }
1196
1197 /*
1198 * debug tracing
1199 */
1200 extern unsigned int rxrpc_debug;
1201
1202 #define dbgprintk(FMT,...) \
1203 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1204
1205 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1206 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1207 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1208 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1209 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1210
1211
1212 #if defined(__KDEBUG)
1213 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1214 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1215 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1216 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1217 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1218
1219 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1220 #define RXRPC_DEBUG_KENTER 0x01
1221 #define RXRPC_DEBUG_KLEAVE 0x02
1222 #define RXRPC_DEBUG_KDEBUG 0x04
1223 #define RXRPC_DEBUG_KPROTO 0x08
1224 #define RXRPC_DEBUG_KNET 0x10
1225
1226 #define _enter(FMT,...) \
1227 do { \
1228 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1229 kenter(FMT,##__VA_ARGS__); \
1230 } while (0)
1231
1232 #define _leave(FMT,...) \
1233 do { \
1234 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1235 kleave(FMT,##__VA_ARGS__); \
1236 } while (0)
1237
1238 #define _debug(FMT,...) \
1239 do { \
1240 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1241 kdebug(FMT,##__VA_ARGS__); \
1242 } while (0)
1243
1244 #define _proto(FMT,...) \
1245 do { \
1246 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1247 kproto(FMT,##__VA_ARGS__); \
1248 } while (0)
1249
1250 #define _net(FMT,...) \
1251 do { \
1252 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1253 knet(FMT,##__VA_ARGS__); \
1254 } while (0)
1255
1256 #else
1257 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1258 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1259 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1260 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1261 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1262 #endif
1263
1264 /*
1265 * debug assertion checking
1266 */
1267 #if 1 // defined(__KDEBUGALL)
1268
1269 #define ASSERT(X) \
1270 do { \
1271 if (unlikely(!(X))) { \
1272 pr_err("Assertion failed\n"); \
1273 BUG(); \
1274 } \
1275 } while (0)
1276
1277 #define ASSERTCMP(X, OP, Y) \
1278 do { \
1279 __typeof__(X) _x = (X); \
1280 __typeof__(Y) _y = (__typeof__(X))(Y); \
1281 if (unlikely(!(_x OP _y))) { \
1282 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1283 (unsigned long)_x, (unsigned long)_x, #OP, \
1284 (unsigned long)_y, (unsigned long)_y); \
1285 BUG(); \
1286 } \
1287 } while (0)
1288
1289 #define ASSERTIF(C, X) \
1290 do { \
1291 if (unlikely((C) && !(X))) { \
1292 pr_err("Assertion failed\n"); \
1293 BUG(); \
1294 } \
1295 } while (0)
1296
1297 #define ASSERTIFCMP(C, X, OP, Y) \
1298 do { \
1299 __typeof__(X) _x = (X); \
1300 __typeof__(Y) _y = (__typeof__(X))(Y); \
1301 if (unlikely((C) && !(_x OP _y))) { \
1302 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1303 (unsigned long)_x, (unsigned long)_x, #OP, \
1304 (unsigned long)_y, (unsigned long)_y); \
1305 BUG(); \
1306 } \
1307 } while (0)
1308
1309 #else
1310
1311 #define ASSERT(X) \
1312 do { \
1313 } while (0)
1314
1315 #define ASSERTCMP(X, OP, Y) \
1316 do { \
1317 } while (0)
1318
1319 #define ASSERTIF(C, X) \
1320 do { \
1321 } while (0)
1322
1323 #define ASSERTIFCMP(C, X, OP, Y) \
1324 do { \
1325 } while (0)
1326
1327 #endif /* __KDEBUGALL */
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