]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - net/rxrpc/ar-internal.h
projects / mirror_ubuntu-zesty-kernel.git / blob
? search:


d38dffd7808536a510a523ad5d3d3032abc4c178
[mirror_ubuntu-zesty-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_PINGING, /* Ping in process */
402 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
403 };
404
405 /*
406 * Events that can be raised on a call.
407 */
408 enum rxrpc_call_event {
409 RXRPC_CALL_EV_ACK, /* need to generate ACK */
410 RXRPC_CALL_EV_ABORT, /* need to generate abort */
411 RXRPC_CALL_EV_TIMER, /* Timer expired */
412 RXRPC_CALL_EV_RESEND, /* Tx resend required */
413 };
414
415 /*
416 * The states that a call can be in.
417 */
418 enum rxrpc_call_state {
419 RXRPC_CALL_UNINITIALISED,
420 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
421 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
422 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
423 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
424 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
425 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
426 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
427 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
428 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
429 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
430 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
431 RXRPC_CALL_COMPLETE, /* - call complete */
432 NR__RXRPC_CALL_STATES
433 };
434
435 /*
436 * Call completion condition (state == RXRPC_CALL_COMPLETE).
437 */
438 enum rxrpc_call_completion {
439 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
440 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
441 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
442 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
443 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
444 NR__RXRPC_CALL_COMPLETIONS
445 };
446
447 /*
448 * Call Tx congestion management modes.
449 */
450 enum rxrpc_congest_mode {
451 RXRPC_CALL_SLOW_START,
452 RXRPC_CALL_CONGEST_AVOIDANCE,
453 RXRPC_CALL_PACKET_LOSS,
454 RXRPC_CALL_FAST_RETRANSMIT,
455 NR__RXRPC_CONGEST_MODES
456 };
457
458 /*
459 * RxRPC call definition
460 * - matched by { connection, call_id }
461 */
462 struct rxrpc_call {
463 struct rcu_head rcu;
464 struct rxrpc_connection *conn; /* connection carrying call */
465 struct rxrpc_peer *peer; /* Peer record for remote address */
466 struct rxrpc_sock __rcu *socket; /* socket responsible */
467 ktime_t ack_at; /* When deferred ACK needs to happen */
468 ktime_t resend_at; /* When next resend needs to happen */
469 ktime_t expire_at; /* When the call times out */
470 struct timer_list timer; /* Combined event timer */
471 struct work_struct processor; /* Event processor */
472 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
473 struct list_head link; /* link in master call list */
474 struct list_head chan_wait_link; /* Link in conn->waiting_calls */
475 struct hlist_node error_link; /* link in error distribution list */
476 struct list_head accept_link; /* Link in rx->acceptq */
477 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
478 struct list_head sock_link; /* Link in rx->sock_calls */
479 struct rb_node sock_node; /* Node in rx->calls */
480 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
481 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
482 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
483 unsigned long user_call_ID; /* user-defined call ID */
484 unsigned long flags;
485 unsigned long events;
486 spinlock_t lock;
487 rwlock_t state_lock; /* lock for state transition */
488 u32 abort_code; /* Local/remote abort code */
489 int error; /* Local error incurred */
490 enum rxrpc_call_state state; /* current state of call */
491 enum rxrpc_call_completion completion; /* Call completion condition */
492 atomic_t usage;
493 u16 service_id; /* service ID */
494 u8 security_ix; /* Security type */
495 u32 call_id; /* call ID on connection */
496 u32 cid; /* connection ID plus channel index */
497 int debug_id; /* debug ID for printks */
498 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
499 unsigned short rx_pkt_len; /* Current recvmsg packet len */
500
501 /* Rx/Tx circular buffer, depending on phase.
502 *
503 * In the Rx phase, packets are annotated with 0 or the number of the
504 * segment of a jumbo packet each buffer refers to. There can be up to
505 * 47 segments in a maximum-size UDP packet.
506 *
507 * In the Tx phase, packets are annotated with which buffers have been
508 * acked.
509 */
510 #define RXRPC_RXTX_BUFF_SIZE 64
511 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
512 #define RXRPC_INIT_RX_WINDOW_SIZE 32
513 struct sk_buff **rxtx_buffer;
514 u8 *rxtx_annotations;
515 #define RXRPC_TX_ANNO_ACK 0
516 #define RXRPC_TX_ANNO_UNACK 1
517 #define RXRPC_TX_ANNO_NAK 2
518 #define RXRPC_TX_ANNO_RETRANS 3
519 #define RXRPC_TX_ANNO_MASK 0x03
520 #define RXRPC_TX_ANNO_LAST 0x04
521 #define RXRPC_TX_ANNO_RESENT 0x08
522
523 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */
524 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */
525 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
526 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
527 * not hard-ACK'd packet follows this.
528 */
529 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
530
531 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
532 * is fixed, we keep these numbers in terms of segments (ie. DATA
533 * packets) rather than bytes.
534 */
535 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
536 u8 cong_cwnd; /* Congestion window size */
537 u8 cong_extra; /* Extra to send for congestion management */
538 u8 cong_ssthresh; /* Slow-start threshold */
539 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
540 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
541 u8 cong_cumul_acks; /* Cumulative ACK count */
542 ktime_t cong_tstamp; /* Last time cwnd was changed */
543
544 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
545 * consumed packet follows this.
546 */
547 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
548 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
549 u8 rx_winsize; /* Size of Rx window */
550 u8 tx_winsize; /* Maximum size of Tx window */
551 bool tx_phase; /* T if transmission phase, F if receive phase */
552 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
553
554 /* receive-phase ACK management */
555 u8 ackr_reason; /* reason to ACK */
556 u16 ackr_skew; /* skew on packet being ACK'd */
557 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
558 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
559 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
560 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
561 rxrpc_serial_t ackr_ping; /* Last ping sent */
562 ktime_t ackr_ping_time; /* Time last ping sent */
563
564 /* transmission-phase ACK management */
565 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
566 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
567 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
568 };
569
570 /*
571 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
572 */
573 struct rxrpc_ack_summary {
574 u8 ack_reason;
575 u8 nr_acks; /* Number of ACKs in packet */
576 u8 nr_nacks; /* Number of NACKs in packet */
577 u8 nr_new_acks; /* Number of new ACKs in packet */
578 u8 nr_new_nacks; /* Number of new NACKs in packet */
579 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
580 bool new_low_nack; /* T if new low NACK found */
581 bool retrans_timeo; /* T if reTx due to timeout happened */
582 u8 flight_size; /* Number of unreceived transmissions */
583 /* Place to stash values for tracing */
584 enum rxrpc_congest_mode mode:8;
585 u8 cwnd;
586 u8 ssthresh;
587 u8 dup_acks;
588 u8 cumulative_acks;
589 };
590
591 enum rxrpc_skb_trace {
592 rxrpc_skb_rx_cleaned,
593 rxrpc_skb_rx_freed,
594 rxrpc_skb_rx_got,
595 rxrpc_skb_rx_lost,
596 rxrpc_skb_rx_received,
597 rxrpc_skb_rx_rotated,
598 rxrpc_skb_rx_purged,
599 rxrpc_skb_rx_seen,
600 rxrpc_skb_tx_cleaned,
601 rxrpc_skb_tx_freed,
602 rxrpc_skb_tx_got,
603 rxrpc_skb_tx_new,
604 rxrpc_skb_tx_rotated,
605 rxrpc_skb_tx_seen,
606 rxrpc_skb__nr_trace
607 };
608
609 extern const char rxrpc_skb_traces[rxrpc_skb__nr_trace][7];
610
611 enum rxrpc_conn_trace {
612 rxrpc_conn_new_client,
613 rxrpc_conn_new_service,
614 rxrpc_conn_queued,
615 rxrpc_conn_seen,
616 rxrpc_conn_got,
617 rxrpc_conn_put_client,
618 rxrpc_conn_put_service,
619 rxrpc_conn__nr_trace
620 };
621
622 extern const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4];
623
624 enum rxrpc_client_trace {
625 rxrpc_client_activate_chans,
626 rxrpc_client_alloc,
627 rxrpc_client_chan_activate,
628 rxrpc_client_chan_disconnect,
629 rxrpc_client_chan_pass,
630 rxrpc_client_chan_unstarted,
631 rxrpc_client_cleanup,
632 rxrpc_client_count,
633 rxrpc_client_discard,
634 rxrpc_client_duplicate,
635 rxrpc_client_exposed,
636 rxrpc_client_replace,
637 rxrpc_client_to_active,
638 rxrpc_client_to_culled,
639 rxrpc_client_to_idle,
640 rxrpc_client_to_inactive,
641 rxrpc_client_to_waiting,
642 rxrpc_client_uncount,
643 rxrpc_client__nr_trace
644 };
645
646 extern const char rxrpc_client_traces[rxrpc_client__nr_trace][7];
647 extern const char rxrpc_conn_cache_states[RXRPC_CONN__NR_CACHE_STATES][5];
648
649 enum rxrpc_call_trace {
650 rxrpc_call_new_client,
651 rxrpc_call_new_service,
652 rxrpc_call_queued,
653 rxrpc_call_queued_ref,
654 rxrpc_call_seen,
655 rxrpc_call_connected,
656 rxrpc_call_release,
657 rxrpc_call_got,
658 rxrpc_call_got_userid,
659 rxrpc_call_got_kernel,
660 rxrpc_call_put,
661 rxrpc_call_put_userid,
662 rxrpc_call_put_kernel,
663 rxrpc_call_put_noqueue,
664 rxrpc_call_error,
665 rxrpc_call__nr_trace
666 };
667
668 extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4];
669
670 enum rxrpc_transmit_trace {
671 rxrpc_transmit_wait,
672 rxrpc_transmit_queue,
673 rxrpc_transmit_queue_last,
674 rxrpc_transmit_rotate,
675 rxrpc_transmit_rotate_last,
676 rxrpc_transmit_await_reply,
677 rxrpc_transmit_end,
678 rxrpc_transmit__nr_trace
679 };
680
681 extern const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4];
682
683 enum rxrpc_receive_trace {
684 rxrpc_receive_incoming,
685 rxrpc_receive_queue,
686 rxrpc_receive_queue_last,
687 rxrpc_receive_front,
688 rxrpc_receive_rotate,
689 rxrpc_receive_end,
690 rxrpc_receive__nr_trace
691 };
692
693 extern const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4];
694
695 enum rxrpc_recvmsg_trace {
696 rxrpc_recvmsg_enter,
697 rxrpc_recvmsg_wait,
698 rxrpc_recvmsg_dequeue,
699 rxrpc_recvmsg_hole,
700 rxrpc_recvmsg_next,
701 rxrpc_recvmsg_cont,
702 rxrpc_recvmsg_full,
703 rxrpc_recvmsg_data_return,
704 rxrpc_recvmsg_terminal,
705 rxrpc_recvmsg_to_be_accepted,
706 rxrpc_recvmsg_return,
707 rxrpc_recvmsg__nr_trace
708 };
709
710 extern const char rxrpc_recvmsg_traces[rxrpc_recvmsg__nr_trace][5];
711
712 enum rxrpc_rtt_tx_trace {
713 rxrpc_rtt_tx_ping,
714 rxrpc_rtt_tx_data,
715 rxrpc_rtt_tx__nr_trace
716 };
717
718 extern const char rxrpc_rtt_tx_traces[rxrpc_rtt_tx__nr_trace][5];
719
720 enum rxrpc_rtt_rx_trace {
721 rxrpc_rtt_rx_ping_response,
722 rxrpc_rtt_rx_requested_ack,
723 rxrpc_rtt_rx__nr_trace
724 };
725
726 extern const char rxrpc_rtt_rx_traces[rxrpc_rtt_rx__nr_trace][5];
727
728 enum rxrpc_timer_trace {
729 rxrpc_timer_begin,
730 rxrpc_timer_init_for_reply,
731 rxrpc_timer_expired,
732 rxrpc_timer_set_for_ack,
733 rxrpc_timer_set_for_resend,
734 rxrpc_timer_set_for_send,
735 rxrpc_timer__nr_trace
736 };
737
738 extern const char rxrpc_timer_traces[rxrpc_timer__nr_trace][8];
739
740 enum rxrpc_propose_ack_trace {
741 rxrpc_propose_ack_client_tx_end,
742 rxrpc_propose_ack_input_data,
743 rxrpc_propose_ack_ping_for_lost_ack,
744 rxrpc_propose_ack_ping_for_lost_reply,
745 rxrpc_propose_ack_ping_for_params,
746 rxrpc_propose_ack_respond_to_ack,
747 rxrpc_propose_ack_respond_to_ping,
748 rxrpc_propose_ack_retry_tx,
749 rxrpc_propose_ack_rotate_rx,
750 rxrpc_propose_ack_terminal_ack,
751 rxrpc_propose_ack__nr_trace
752 };
753
754 enum rxrpc_propose_ack_outcome {
755 rxrpc_propose_ack_use,
756 rxrpc_propose_ack_update,
757 rxrpc_propose_ack_subsume,
758 rxrpc_propose_ack__nr_outcomes
759 };
760
761 extern const char rxrpc_propose_ack_traces[rxrpc_propose_ack__nr_trace][8];
762 extern const char *const rxrpc_propose_ack_outcomes[rxrpc_propose_ack__nr_outcomes];
763
764 enum rxrpc_congest_change {
765 rxrpc_cong_begin_retransmission,
766 rxrpc_cong_cleared_nacks,
767 rxrpc_cong_new_low_nack,
768 rxrpc_cong_no_change,
769 rxrpc_cong_progress,
770 rxrpc_cong_retransmit_again,
771 rxrpc_cong_rtt_window_end,
772 rxrpc_cong_saw_nack,
773 rxrpc_congest__nr_change
774 };
775
776 extern const char rxrpc_congest_modes[NR__RXRPC_CONGEST_MODES][10];
777 extern const char rxrpc_congest_changes[rxrpc_congest__nr_change][9];
778
779 extern const char *const rxrpc_pkts[];
780 extern const char const rxrpc_ack_names[RXRPC_ACK__INVALID + 1][4];
781
782 #include <trace/events/rxrpc.h>
783
784 /*
785 * af_rxrpc.c
786 */
787 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
788 extern u32 rxrpc_epoch;
789 extern atomic_t rxrpc_debug_id;
790 extern struct workqueue_struct *rxrpc_workqueue;
791
792 /*
793 * call_accept.c
794 */
795 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
796 void rxrpc_discard_prealloc(struct rxrpc_sock *);
797 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
798 struct rxrpc_connection *,
799 struct sk_buff *);
800 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
801 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
802 rxrpc_notify_rx_t);
803 int rxrpc_reject_call(struct rxrpc_sock *);
804
805 /*
806 * call_event.c
807 */
808 void rxrpc_set_timer(struct rxrpc_call *, enum rxrpc_timer_trace, ktime_t);
809 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
810 enum rxrpc_propose_ack_trace);
811 void rxrpc_process_call(struct work_struct *);
812
813 /*
814 * call_object.c
815 */
816 extern const char *const rxrpc_call_states[];
817 extern const char *const rxrpc_call_completions[];
818 extern unsigned int rxrpc_max_call_lifetime;
819 extern struct kmem_cache *rxrpc_call_jar;
820 extern struct list_head rxrpc_calls;
821 extern rwlock_t rxrpc_call_lock;
822
823 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
824 struct rxrpc_call *rxrpc_alloc_call(gfp_t);
825 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
826 struct rxrpc_conn_parameters *,
827 struct sockaddr_rxrpc *,
828 unsigned long, gfp_t);
829 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
830 struct sk_buff *);
831 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
832 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
833 bool __rxrpc_queue_call(struct rxrpc_call *);
834 bool rxrpc_queue_call(struct rxrpc_call *);
835 void rxrpc_see_call(struct rxrpc_call *);
836 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
837 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
838 void rxrpc_cleanup_call(struct rxrpc_call *);
839 void __exit rxrpc_destroy_all_calls(void);
840
841 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
842 {
843 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
844 }
845
846 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
847 {
848 return !rxrpc_is_service_call(call);
849 }
850
851 /*
852 * Transition a call to the complete state.
853 */
854 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
855 enum rxrpc_call_completion compl,
856 u32 abort_code,
857 int error)
858 {
859 if (call->state < RXRPC_CALL_COMPLETE) {
860 call->abort_code = abort_code;
861 call->error = error;
862 call->completion = compl,
863 call->state = RXRPC_CALL_COMPLETE;
864 wake_up(&call->waitq);
865 return true;
866 }
867 return false;
868 }
869
870 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
871 enum rxrpc_call_completion compl,
872 u32 abort_code,
873 int error)
874 {
875 bool ret;
876
877 write_lock_bh(&call->state_lock);
878 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
879 write_unlock_bh(&call->state_lock);
880 return ret;
881 }
882
883 /*
884 * Record that a call successfully completed.
885 */
886 static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
887 {
888 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
889 }
890
891 static inline bool rxrpc_call_completed(struct rxrpc_call *call)
892 {
893 bool ret;
894
895 write_lock_bh(&call->state_lock);
896 ret = __rxrpc_call_completed(call);
897 write_unlock_bh(&call->state_lock);
898 return ret;
899 }
900
901 /*
902 * Record that a call is locally aborted.
903 */
904 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
905 rxrpc_seq_t seq,
906 u32 abort_code, int error)
907 {
908 trace_rxrpc_abort(why, call->cid, call->call_id, seq,
909 abort_code, error);
910 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
911 abort_code, error);
912 }
913
914 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
915 rxrpc_seq_t seq, u32 abort_code, int error)
916 {
917 bool ret;
918
919 write_lock_bh(&call->state_lock);
920 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
921 write_unlock_bh(&call->state_lock);
922 return ret;
923 }
924
925 /*
926 * conn_client.c
927 */
928 extern unsigned int rxrpc_max_client_connections;
929 extern unsigned int rxrpc_reap_client_connections;
930 extern unsigned int rxrpc_conn_idle_client_expiry;
931 extern unsigned int rxrpc_conn_idle_client_fast_expiry;
932 extern struct idr rxrpc_client_conn_ids;
933
934 void rxrpc_destroy_client_conn_ids(void);
935 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
936 struct sockaddr_rxrpc *, gfp_t);
937 void rxrpc_expose_client_call(struct rxrpc_call *);
938 void rxrpc_disconnect_client_call(struct rxrpc_call *);
939 void rxrpc_put_client_conn(struct rxrpc_connection *);
940 void __exit rxrpc_destroy_all_client_connections(void);
941
942 /*
943 * conn_event.c
944 */
945 void rxrpc_process_connection(struct work_struct *);
946
947 /*
948 * conn_object.c
949 */
950 extern unsigned int rxrpc_connection_expiry;
951 extern struct list_head rxrpc_connections;
952 extern struct list_head rxrpc_connection_proc_list;
953 extern rwlock_t rxrpc_connection_lock;
954
955 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
956 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
957 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
958 struct sk_buff *);
959 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
960 void rxrpc_disconnect_call(struct rxrpc_call *);
961 void rxrpc_kill_connection(struct rxrpc_connection *);
962 bool rxrpc_queue_conn(struct rxrpc_connection *);
963 void rxrpc_see_connection(struct rxrpc_connection *);
964 void rxrpc_get_connection(struct rxrpc_connection *);
965 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
966 void rxrpc_put_service_conn(struct rxrpc_connection *);
967 void __exit rxrpc_destroy_all_connections(void);
968
969 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
970 {
971 return conn->out_clientflag;
972 }
973
974 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
975 {
976 return !rxrpc_conn_is_client(conn);
977 }
978
979 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
980 {
981 if (!conn)
982 return;
983
984 if (rxrpc_conn_is_client(conn))
985 rxrpc_put_client_conn(conn);
986 else
987 rxrpc_put_service_conn(conn);
988 }
989
990 /*
991 * conn_service.c
992 */
993 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
994 struct sk_buff *);
995 struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t);
996 void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *);
997 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
998
999 /*
1000 * input.c
1001 */
1002 void rxrpc_data_ready(struct sock *);
1003
1004 /*
1005 * insecure.c
1006 */
1007 extern const struct rxrpc_security rxrpc_no_security;
1008
1009 /*
1010 * key.c
1011 */
1012 extern struct key_type key_type_rxrpc;
1013 extern struct key_type key_type_rxrpc_s;
1014
1015 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
1016 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
1017 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
1018 u32);
1019
1020 /*
1021 * local_event.c
1022 */
1023 extern void rxrpc_process_local_events(struct rxrpc_local *);
1024
1025 /*
1026 * local_object.c
1027 */
1028 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *);
1029 void __rxrpc_put_local(struct rxrpc_local *);
1030 void __exit rxrpc_destroy_all_locals(void);
1031
1032 static inline void rxrpc_get_local(struct rxrpc_local *local)
1033 {
1034 atomic_inc(&local->usage);
1035 }
1036
1037 static inline
1038 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
1039 {
1040 return atomic_inc_not_zero(&local->usage) ? local : NULL;
1041 }
1042
1043 static inline void rxrpc_put_local(struct rxrpc_local *local)
1044 {
1045 if (local && atomic_dec_and_test(&local->usage))
1046 __rxrpc_put_local(local);
1047 }
1048
1049 static inline void rxrpc_queue_local(struct rxrpc_local *local)
1050 {
1051 rxrpc_queue_work(&local->processor);
1052 }
1053
1054 /*
1055 * misc.c
1056 */
1057 extern unsigned int rxrpc_max_backlog __read_mostly;
1058 extern unsigned int rxrpc_requested_ack_delay;
1059 extern unsigned int rxrpc_soft_ack_delay;
1060 extern unsigned int rxrpc_idle_ack_delay;
1061 extern unsigned int rxrpc_rx_window_size;
1062 extern unsigned int rxrpc_rx_mtu;
1063 extern unsigned int rxrpc_rx_jumbo_max;
1064 extern unsigned int rxrpc_resend_timeout;
1065
1066 extern const s8 rxrpc_ack_priority[];
1067
1068 /*
1069 * output.c
1070 */
1071 int rxrpc_send_call_packet(struct rxrpc_call *, u8);
1072 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
1073 void rxrpc_reject_packets(struct rxrpc_local *);
1074
1075 /*
1076 * peer_event.c
1077 */
1078 void rxrpc_error_report(struct sock *);
1079 void rxrpc_peer_error_distributor(struct work_struct *);
1080 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1081 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1082
1083 /*
1084 * peer_object.c
1085 */
1086 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1087 const struct sockaddr_rxrpc *);
1088 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
1089 struct sockaddr_rxrpc *, gfp_t);
1090 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1091 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *,
1092 struct rxrpc_peer *);
1093
1094 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer)
1095 {
1096 atomic_inc(&peer->usage);
1097 return peer;
1098 }
1099
1100 static inline
1101 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
1102 {
1103 return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
1104 }
1105
1106 extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
1107 static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
1108 {
1109 if (peer && atomic_dec_and_test(&peer->usage))
1110 __rxrpc_put_peer(peer);
1111 }
1112
1113 /*
1114 * proc.c
1115 */
1116 extern const struct file_operations rxrpc_call_seq_fops;
1117 extern const struct file_operations rxrpc_connection_seq_fops;
1118
1119 /*
1120 * recvmsg.c
1121 */
1122 void rxrpc_notify_socket(struct rxrpc_call *);
1123 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1124
1125 /*
1126 * rxkad.c
1127 */
1128 #ifdef CONFIG_RXKAD
1129 extern const struct rxrpc_security rxkad;
1130 #endif
1131
1132 /*
1133 * security.c
1134 */
1135 int __init rxrpc_init_security(void);
1136 void rxrpc_exit_security(void);
1137 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1138 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
1139
1140 /*
1141 * sendmsg.c
1142 */
1143 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1144
1145 /*
1146 * skbuff.c
1147 */
1148 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1149 void rxrpc_packet_destructor(struct sk_buff *);
1150 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1151 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1152 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1153 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1154 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
1155 void rxrpc_purge_queue(struct sk_buff_head *);
1156
1157 /*
1158 * sysctl.c
1159 */
1160 #ifdef CONFIG_SYSCTL
1161 extern int __init rxrpc_sysctl_init(void);
1162 extern void rxrpc_sysctl_exit(void);
1163 #else
1164 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1165 static inline void rxrpc_sysctl_exit(void) {}
1166 #endif
1167
1168 /*
1169 * utils.c
1170 */
1171 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1172
1173 static inline bool before(u32 seq1, u32 seq2)
1174 {
1175 return (s32)(seq1 - seq2) < 0;
1176 }
1177 static inline bool before_eq(u32 seq1, u32 seq2)
1178 {
1179 return (s32)(seq1 - seq2) <= 0;
1180 }
1181 static inline bool after(u32 seq1, u32 seq2)
1182 {
1183 return (s32)(seq1 - seq2) > 0;
1184 }
1185 static inline bool after_eq(u32 seq1, u32 seq2)
1186 {
1187 return (s32)(seq1 - seq2) >= 0;
1188 }
1189
1190 /*
1191 * debug tracing
1192 */
1193 extern unsigned int rxrpc_debug;
1194
1195 #define dbgprintk(FMT,...) \
1196 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1197
1198 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1199 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1200 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1201 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1202 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1203
1204
1205 #if defined(__KDEBUG)
1206 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1207 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1208 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1209 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1210 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1211
1212 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1213 #define RXRPC_DEBUG_KENTER 0x01
1214 #define RXRPC_DEBUG_KLEAVE 0x02
1215 #define RXRPC_DEBUG_KDEBUG 0x04
1216 #define RXRPC_DEBUG_KPROTO 0x08
1217 #define RXRPC_DEBUG_KNET 0x10
1218
1219 #define _enter(FMT,...) \
1220 do { \
1221 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1222 kenter(FMT,##__VA_ARGS__); \
1223 } while (0)
1224
1225 #define _leave(FMT,...) \
1226 do { \
1227 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1228 kleave(FMT,##__VA_ARGS__); \
1229 } while (0)
1230
1231 #define _debug(FMT,...) \
1232 do { \
1233 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1234 kdebug(FMT,##__VA_ARGS__); \
1235 } while (0)
1236
1237 #define _proto(FMT,...) \
1238 do { \
1239 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1240 kproto(FMT,##__VA_ARGS__); \
1241 } while (0)
1242
1243 #define _net(FMT,...) \
1244 do { \
1245 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1246 knet(FMT,##__VA_ARGS__); \
1247 } while (0)
1248
1249 #else
1250 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1251 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1252 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1253 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1254 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1255 #endif
1256
1257 /*
1258 * debug assertion checking
1259 */
1260 #if 1 // defined(__KDEBUGALL)
1261
1262 #define ASSERT(X) \
1263 do { \
1264 if (unlikely(!(X))) { \
1265 pr_err("Assertion failed\n"); \
1266 BUG(); \
1267 } \
1268 } while (0)
1269
1270 #define ASSERTCMP(X, OP, Y) \
1271 do { \
1272 __typeof__(X) _x = (X); \
1273 __typeof__(Y) _y = (__typeof__(X))(Y); \
1274 if (unlikely(!(_x OP _y))) { \
1275 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1276 (unsigned long)_x, (unsigned long)_x, #OP, \
1277 (unsigned long)_y, (unsigned long)_y); \
1278 BUG(); \
1279 } \
1280 } while (0)
1281
1282 #define ASSERTIF(C, X) \
1283 do { \
1284 if (unlikely((C) && !(X))) { \
1285 pr_err("Assertion failed\n"); \
1286 BUG(); \
1287 } \
1288 } while (0)
1289
1290 #define ASSERTIFCMP(C, X, OP, Y) \
1291 do { \
1292 __typeof__(X) _x = (X); \
1293 __typeof__(Y) _y = (__typeof__(X))(Y); \
1294 if (unlikely((C) && !(_x OP _y))) { \
1295 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1296 (unsigned long)_x, (unsigned long)_x, #OP, \
1297 (unsigned long)_y, (unsigned long)_y); \
1298 BUG(); \
1299 } \
1300 } while (0)
1301
1302 #else
1303
1304 #define ASSERT(X) \
1305 do { \
1306 } while (0)
1307
1308 #define ASSERTCMP(X, OP, Y) \
1309 do { \
1310 } while (0)
1311
1312 #define ASSERTIF(C, X) \
1313 do { \
1314 } while (0)
1315
1316 #define ASSERTIFCMP(C, X, OP, Y) \
1317 do { \
1318 } while (0)
1319
1320 #endif /* __KDEBUGALL */
ubuntu-zesty-kernel mirror