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bnxt_en: Expand bnxt_check_rings() to check all resources.
[linux-2.6/btrfs-unstable.git] / net / rxrpc / ar-internal.h
blob416688381eb7d4d1a6fc71d826f0f2e35eda3b31
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/net_namespace.h>
15 #include <net/netns/generic.h>
16 #include <net/sock.h>
17 #include <net/af_rxrpc.h>
18 #include "protocol.h"
19
20 #if 0
21 #define CHECK_SLAB_OKAY(X) \
22 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
23 (POISON_FREE << 8 | POISON_FREE))
24 #else
25 #define CHECK_SLAB_OKAY(X) do {} while (0)
26 #endif
27
28 #define FCRYPT_BSIZE 8
29 struct rxrpc_crypt {
30 union {
31 u8 x[FCRYPT_BSIZE];
32 __be32 n[2];
33 };
34 } __attribute__((aligned(8)));
35
36 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
37 #define rxrpc_queue_delayed_work(WS,D) \
38 queue_delayed_work(rxrpc_workqueue, (WS), (D))
39
40 struct rxrpc_connection;
41
42 /*
43 * Mark applied to socket buffers.
44 */
45 enum rxrpc_skb_mark {
46 RXRPC_SKB_MARK_DATA, /* data message */
47 RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */
48 RXRPC_SKB_MARK_BUSY, /* server busy message */
49 RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */
50 RXRPC_SKB_MARK_LOCAL_ABORT, /* local abort message */
51 RXRPC_SKB_MARK_NET_ERROR, /* network error message */
52 RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */
53 RXRPC_SKB_MARK_NEW_CALL, /* local error message */
54 };
55
56 /*
57 * sk_state for RxRPC sockets
58 */
59 enum {
60 RXRPC_UNBOUND = 0,
61 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
62 RXRPC_CLIENT_BOUND, /* client local address bound */
63 RXRPC_SERVER_BOUND, /* server local address bound */
64 RXRPC_SERVER_BOUND2, /* second server local address bound */
65 RXRPC_SERVER_LISTENING, /* server listening for connections */
66 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
67 RXRPC_CLOSE, /* socket is being closed */
68 };
69
70 /*
71 * Per-network namespace data.
72 */
73 struct rxrpc_net {
74 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
75 u32 epoch; /* Local epoch for detecting local-end reset */
76 struct list_head calls; /* List of calls active in this namespace */
77 rwlock_t call_lock; /* Lock for ->calls */
78
79 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
80 struct list_head service_conns; /* Service conns in this namespace */
81 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
82 struct work_struct service_conn_reaper;
83 struct timer_list service_conn_reap_timer;
84
85 unsigned int nr_client_conns;
86 unsigned int nr_active_client_conns;
87 bool kill_all_client_conns;
88 bool live;
89 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
90 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
91 struct list_head waiting_client_conns;
92 struct list_head active_client_conns;
93 struct list_head idle_client_conns;
94 struct work_struct client_conn_reaper;
95 struct timer_list client_conn_reap_timer;
96
97 struct list_head local_endpoints;
98 struct mutex local_mutex; /* Lock for ->local_endpoints */
99
100 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
101 DECLARE_HASHTABLE (peer_hash, 10);
102 };
103
104 /*
105 * Service backlog preallocation.
106 *
107 * This contains circular buffers of preallocated peers, connections and calls
108 * for incoming service calls and their head and tail pointers. This allows
109 * calls to be set up in the data_ready handler, thereby avoiding the need to
110 * shuffle packets around so much.
111 */
112 struct rxrpc_backlog {
113 unsigned short peer_backlog_head;
114 unsigned short peer_backlog_tail;
115 unsigned short conn_backlog_head;
116 unsigned short conn_backlog_tail;
117 unsigned short call_backlog_head;
118 unsigned short call_backlog_tail;
119 #define RXRPC_BACKLOG_MAX 32
120 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
121 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
122 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
123 };
124
125 /*
126 * RxRPC socket definition
127 */
128 struct rxrpc_sock {
129 /* WARNING: sk has to be the first member */
130 struct sock sk;
131 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
132 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
133 struct rxrpc_local *local; /* local endpoint */
134 struct rxrpc_backlog *backlog; /* Preallocation for services */
135 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
136 struct list_head sock_calls; /* List of calls owned by this socket */
137 struct list_head to_be_accepted; /* calls awaiting acceptance */
138 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
139 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
140 struct key *key; /* security for this socket */
141 struct key *securities; /* list of server security descriptors */
142 struct rb_root calls; /* User ID -> call mapping */
143 unsigned long flags;
144 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
145 rwlock_t call_lock; /* lock for calls */
146 u32 min_sec_level; /* minimum security level */
147 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
148 bool exclusive; /* Exclusive connection for a client socket */
149 u16 second_service; /* Additional service bound to the endpoint */
150 struct {
151 /* Service upgrade information */
152 u16 from; /* Service ID to upgrade (if not 0) */
153 u16 to; /* service ID to upgrade to */
154 } service_upgrade;
155 sa_family_t family; /* Protocol family created with */
156 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
157 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
158 };
159
160 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
161
162 /*
163 * CPU-byteorder normalised Rx packet header.
164 */
165 struct rxrpc_host_header {
166 u32 epoch; /* client boot timestamp */
167 u32 cid; /* connection and channel ID */
168 u32 callNumber; /* call ID (0 for connection-level packets) */
169 u32 seq; /* sequence number of pkt in call stream */
170 u32 serial; /* serial number of pkt sent to network */
171 u8 type; /* packet type */
172 u8 flags; /* packet flags */
173 u8 userStatus; /* app-layer defined status */
174 u8 securityIndex; /* security protocol ID */
175 union {
176 u16 _rsvd; /* reserved */
177 u16 cksum; /* kerberos security checksum */
178 };
179 u16 serviceId; /* service ID */
180 } __packed;
181
182 /*
183 * RxRPC socket buffer private variables
184 * - max 48 bytes (struct sk_buff::cb)
185 */
186 struct rxrpc_skb_priv {
187 union {
188 u8 nr_jumbo; /* Number of jumbo subpackets */
189 };
190 union {
191 int remain; /* amount of space remaining for next write */
192 };
193
194 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
195 };
196
197 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
198
199 /*
200 * RxRPC security module interface
201 */
202 struct rxrpc_security {
203 const char *name; /* name of this service */
204 u8 security_index; /* security type provided */
205
206 /* Initialise a security service */
207 int (*init)(void);
208
209 /* Clean up a security service */
210 void (*exit)(void);
211
212 /* initialise a connection's security */
213 int (*init_connection_security)(struct rxrpc_connection *);
214
215 /* prime a connection's packet security */
216 int (*prime_packet_security)(struct rxrpc_connection *);
217
218 /* impose security on a packet */
219 int (*secure_packet)(struct rxrpc_call *,
220 struct sk_buff *,
221 size_t,
222 void *);
223
224 /* verify the security on a received packet */
225 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
226 unsigned int, unsigned int, rxrpc_seq_t, u16);
227
228 /* Locate the data in a received packet that has been verified. */
229 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
230 unsigned int *, unsigned int *);
231
232 /* issue a challenge */
233 int (*issue_challenge)(struct rxrpc_connection *);
234
235 /* respond to a challenge */
236 int (*respond_to_challenge)(struct rxrpc_connection *,
237 struct sk_buff *,
238 u32 *);
239
240 /* verify a response */
241 int (*verify_response)(struct rxrpc_connection *,
242 struct sk_buff *,
243 u32 *);
244
245 /* clear connection security */
246 void (*clear)(struct rxrpc_connection *);
247 };
248
249 /*
250 * RxRPC local transport endpoint description
251 * - owned by a single AF_RXRPC socket
252 * - pointed to by transport socket struct sk_user_data
253 */
254 struct rxrpc_local {
255 struct rcu_head rcu;
256 atomic_t usage;
257 struct rxrpc_net *rxnet; /* The network ns in which this resides */
258 struct list_head link;
259 struct socket *socket; /* my UDP socket */
260 struct work_struct processor;
261 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
262 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
263 struct sk_buff_head reject_queue; /* packets awaiting rejection */
264 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
265 struct rb_root client_conns; /* Client connections by socket params */
266 spinlock_t client_conns_lock; /* Lock for client_conns */
267 spinlock_t lock; /* access lock */
268 rwlock_t services_lock; /* lock for services list */
269 int debug_id; /* debug ID for printks */
270 bool dead;
271 bool service_closed; /* Service socket closed */
272 struct sockaddr_rxrpc srx; /* local address */
273 };
274
275 /*
276 * RxRPC remote transport endpoint definition
277 * - matched by local endpoint, remote port, address and protocol type
278 */
279 struct rxrpc_peer {
280 struct rcu_head rcu; /* This must be first */
281 atomic_t usage;
282 unsigned long hash_key;
283 struct hlist_node hash_link;
284 struct rxrpc_local *local;
285 struct hlist_head error_targets; /* targets for net error distribution */
286 struct work_struct error_distributor;
287 struct rb_root service_conns; /* Service connections */
288 seqlock_t service_conn_lock;
289 spinlock_t lock; /* access lock */
290 unsigned int if_mtu; /* interface MTU for this peer */
291 unsigned int mtu; /* network MTU for this peer */
292 unsigned int maxdata; /* data size (MTU - hdrsize) */
293 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
294 int debug_id; /* debug ID for printks */
295 int error_report; /* Net (+0) or local (+1000000) to distribute */
296 #define RXRPC_LOCAL_ERROR_OFFSET 1000000
297 struct sockaddr_rxrpc srx; /* remote address */
298
299 /* calculated RTT cache */
300 #define RXRPC_RTT_CACHE_SIZE 32
301 ktime_t rtt_last_req; /* Time of last RTT request */
302 u64 rtt; /* Current RTT estimate (in nS) */
303 u64 rtt_sum; /* Sum of cache contents */
304 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
305 u8 rtt_cursor; /* next entry at which to insert */
306 u8 rtt_usage; /* amount of cache actually used */
307
308 u8 cong_cwnd; /* Congestion window size */
309 };
310
311 /*
312 * Keys for matching a connection.
313 */
314 struct rxrpc_conn_proto {
315 union {
316 struct {
317 u32 epoch; /* epoch of this connection */
318 u32 cid; /* connection ID */
319 };
320 u64 index_key;
321 };
322 };
323
324 struct rxrpc_conn_parameters {
325 struct rxrpc_local *local; /* Representation of local endpoint */
326 struct rxrpc_peer *peer; /* Remote endpoint */
327 struct key *key; /* Security details */
328 bool exclusive; /* T if conn is exclusive */
329 bool upgrade; /* T if service ID can be upgraded */
330 u16 service_id; /* Service ID for this connection */
331 u32 security_level; /* Security level selected */
332 };
333
334 /*
335 * Bits in the connection flags.
336 */
337 enum rxrpc_conn_flag {
338 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
339 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
340 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
341 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */
342 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
343 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
344 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
345 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
346 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
347 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
348 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
349 };
350
351 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
352 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
353 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
354 (1UL << RXRPC_CONN_FINAL_ACK_3))
355
356 /*
357 * Events that can be raised upon a connection.
358 */
359 enum rxrpc_conn_event {
360 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
361 };
362
363 /*
364 * The connection cache state.
365 */
366 enum rxrpc_conn_cache_state {
367 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */
368 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */
369 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
370 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */
371 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
372 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
373 RXRPC_CONN__NR_CACHE_STATES
374 };
375
376 /*
377 * The connection protocol state.
378 */
379 enum rxrpc_conn_proto_state {
380 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
381 RXRPC_CONN_CLIENT, /* Client connection */
382 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
383 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
384 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
385 RXRPC_CONN_SERVICE, /* Service secured connection */
386 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
387 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
388 RXRPC_CONN__NR_STATES
389 };
390
391 /*
392 * RxRPC connection definition
393 * - matched by { local, peer, epoch, conn_id, direction }
394 * - each connection can only handle four simultaneous calls
395 */
396 struct rxrpc_connection {
397 struct rxrpc_conn_proto proto;
398 struct rxrpc_conn_parameters params;
399
400 atomic_t usage;
401 struct rcu_head rcu;
402 struct list_head cache_link;
403
404 spinlock_t channel_lock;
405 unsigned char active_chans; /* Mask of active channels */
406 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
407 struct list_head waiting_calls; /* Calls waiting for channels */
408 struct rxrpc_channel {
409 unsigned long final_ack_at; /* Time at which to issue final ACK */
410 struct rxrpc_call __rcu *call; /* Active call */
411 u32 call_id; /* ID of current call */
412 u32 call_counter; /* Call ID counter */
413 u32 last_call; /* ID of last call */
414 u8 last_type; /* Type of last packet */
415 union {
416 u32 last_seq;
417 u32 last_abort;
418 };
419 } channels[RXRPC_MAXCALLS];
420
421 struct timer_list timer; /* Conn event timer */
422 struct work_struct processor; /* connection event processor */
423 union {
424 struct rb_node client_node; /* Node in local->client_conns */
425 struct rb_node service_node; /* Node in peer->service_conns */
426 };
427 struct list_head proc_link; /* link in procfs list */
428 struct list_head link; /* link in master connection list */
429 struct sk_buff_head rx_queue; /* received conn-level packets */
430 const struct rxrpc_security *security; /* applied security module */
431 struct key *server_key; /* security for this service */
432 struct crypto_skcipher *cipher; /* encryption handle */
433 struct rxrpc_crypt csum_iv; /* packet checksum base */
434 unsigned long flags;
435 unsigned long events;
436 unsigned long idle_timestamp; /* Time at which last became idle */
437 spinlock_t state_lock; /* state-change lock */
438 enum rxrpc_conn_cache_state cache_state;
439 enum rxrpc_conn_proto_state state; /* current state of connection */
440 u32 local_abort; /* local abort code */
441 u32 remote_abort; /* remote abort code */
442 int debug_id; /* debug ID for printks */
443 atomic_t serial; /* packet serial number counter */
444 unsigned int hi_serial; /* highest serial number received */
445 u32 security_nonce; /* response re-use preventer */
446 u16 service_id; /* Service ID, possibly upgraded */
447 u8 size_align; /* data size alignment (for security) */
448 u8 security_size; /* security header size */
449 u8 security_ix; /* security type */
450 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
451 };
452
453 /*
454 * Flags in call->flags.
455 */
456 enum rxrpc_call_flag {
457 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
458 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
459 RXRPC_CALL_IS_SERVICE, /* Call is service call */
460 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
461 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
462 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
463 RXRPC_CALL_TX_LASTQ, /* Last packet has been queued */
464 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
465 RXRPC_CALL_PINGING, /* Ping in process */
466 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
467 };
468
469 /*
470 * Events that can be raised on a call.
471 */
472 enum rxrpc_call_event {
473 RXRPC_CALL_EV_ACK, /* need to generate ACK */
474 RXRPC_CALL_EV_ABORT, /* need to generate abort */
475 RXRPC_CALL_EV_RESEND, /* Tx resend required */
476 RXRPC_CALL_EV_PING, /* Ping send required */
477 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
478 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
479 };
480
481 /*
482 * The states that a call can be in.
483 */
484 enum rxrpc_call_state {
485 RXRPC_CALL_UNINITIALISED,
486 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
487 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
488 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
489 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
490 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
491 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
492 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
493 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
494 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
495 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
496 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
497 RXRPC_CALL_COMPLETE, /* - call complete */
498 NR__RXRPC_CALL_STATES
499 };
500
501 /*
502 * Call Tx congestion management modes.
503 */
504 enum rxrpc_congest_mode {
505 RXRPC_CALL_SLOW_START,
506 RXRPC_CALL_CONGEST_AVOIDANCE,
507 RXRPC_CALL_PACKET_LOSS,
508 RXRPC_CALL_FAST_RETRANSMIT,
509 NR__RXRPC_CONGEST_MODES
510 };
511
512 /*
513 * RxRPC call definition
514 * - matched by { connection, call_id }
515 */
516 struct rxrpc_call {
517 struct rcu_head rcu;
518 struct rxrpc_connection *conn; /* connection carrying call */
519 struct rxrpc_peer *peer; /* Peer record for remote address */
520 struct rxrpc_sock __rcu *socket; /* socket responsible */
521 struct mutex user_mutex; /* User access mutex */
522 unsigned long ack_at; /* When deferred ACK needs to happen */
523 unsigned long ack_lost_at; /* When ACK is figured as lost */
524 unsigned long resend_at; /* When next resend needs to happen */
525 unsigned long ping_at; /* When next to send a ping */
526 unsigned long keepalive_at; /* When next to send a keepalive ping */
527 unsigned long expect_rx_by; /* When we expect to get a packet by */
528 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
529 unsigned long expect_term_by; /* When we expect call termination by */
530 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
531 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
532 struct timer_list timer; /* Combined event timer */
533 struct work_struct processor; /* Event processor */
534 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
535 struct list_head link; /* link in master call list */
536 struct list_head chan_wait_link; /* Link in conn->waiting_calls */
537 struct hlist_node error_link; /* link in error distribution list */
538 struct list_head accept_link; /* Link in rx->acceptq */
539 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
540 struct list_head sock_link; /* Link in rx->sock_calls */
541 struct rb_node sock_node; /* Node in rx->calls */
542 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
543 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
544 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
545 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
546 unsigned long user_call_ID; /* user-defined call ID */
547 unsigned long flags;
548 unsigned long events;
549 spinlock_t lock;
550 spinlock_t notify_lock; /* Kernel notification lock */
551 rwlock_t state_lock; /* lock for state transition */
552 u32 abort_code; /* Local/remote abort code */
553 int error; /* Local error incurred */
554 enum rxrpc_call_state state; /* current state of call */
555 enum rxrpc_call_completion completion; /* Call completion condition */
556 atomic_t usage;
557 u16 service_id; /* service ID */
558 u8 security_ix; /* Security type */
559 u32 call_id; /* call ID on connection */
560 u32 cid; /* connection ID plus channel index */
561 int debug_id; /* debug ID for printks */
562 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
563 unsigned short rx_pkt_len; /* Current recvmsg packet len */
564
565 /* Rx/Tx circular buffer, depending on phase.
566 *
567 * In the Rx phase, packets are annotated with 0 or the number of the
568 * segment of a jumbo packet each buffer refers to. There can be up to
569 * 47 segments in a maximum-size UDP packet.
570 *
571 * In the Tx phase, packets are annotated with which buffers have been
572 * acked.
573 */
574 #define RXRPC_RXTX_BUFF_SIZE 64
575 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
576 #define RXRPC_INIT_RX_WINDOW_SIZE 32
577 struct sk_buff **rxtx_buffer;
578 u8 *rxtx_annotations;
579 #define RXRPC_TX_ANNO_ACK 0
580 #define RXRPC_TX_ANNO_UNACK 1
581 #define RXRPC_TX_ANNO_NAK 2
582 #define RXRPC_TX_ANNO_RETRANS 3
583 #define RXRPC_TX_ANNO_MASK 0x03
584 #define RXRPC_TX_ANNO_LAST 0x04
585 #define RXRPC_TX_ANNO_RESENT 0x08
586
587 #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */
588 #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */
589 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
590 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
591 * not hard-ACK'd packet follows this.
592 */
593 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
594
595 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
596 * is fixed, we keep these numbers in terms of segments (ie. DATA
597 * packets) rather than bytes.
598 */
599 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
600 u8 cong_cwnd; /* Congestion window size */
601 u8 cong_extra; /* Extra to send for congestion management */
602 u8 cong_ssthresh; /* Slow-start threshold */
603 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
604 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
605 u8 cong_cumul_acks; /* Cumulative ACK count */
606 ktime_t cong_tstamp; /* Last time cwnd was changed */
607
608 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
609 * consumed packet follows this.
610 */
611 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
612 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
613 u8 rx_winsize; /* Size of Rx window */
614 u8 tx_winsize; /* Maximum size of Tx window */
615 bool tx_phase; /* T if transmission phase, F if receive phase */
616 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
617
618 /* receive-phase ACK management */
619 u8 ackr_reason; /* reason to ACK */
620 u16 ackr_skew; /* skew on packet being ACK'd */
621 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
622 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
623 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
624 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
625
626 /* ping management */
627 rxrpc_serial_t ping_serial; /* Last ping sent */
628 ktime_t ping_time; /* Time last ping sent */
629
630 /* transmission-phase ACK management */
631 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
632 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
633 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
634 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
635 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
636 };
637
638 /*
639 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
640 */
641 struct rxrpc_ack_summary {
642 u8 ack_reason;
643 u8 nr_acks; /* Number of ACKs in packet */
644 u8 nr_nacks; /* Number of NACKs in packet */
645 u8 nr_new_acks; /* Number of new ACKs in packet */
646 u8 nr_new_nacks; /* Number of new NACKs in packet */
647 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
648 bool new_low_nack; /* T if new low NACK found */
649 bool retrans_timeo; /* T if reTx due to timeout happened */
650 u8 flight_size; /* Number of unreceived transmissions */
651 /* Place to stash values for tracing */
652 enum rxrpc_congest_mode mode:8;
653 u8 cwnd;
654 u8 ssthresh;
655 u8 dup_acks;
656 u8 cumulative_acks;
657 };
658
659 /*
660 * sendmsg() cmsg-specified parameters.
661 */
662 enum rxrpc_command {
663 RXRPC_CMD_SEND_DATA, /* send data message */
664 RXRPC_CMD_SEND_ABORT, /* request abort generation */
665 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
666 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
667 };
668
669 struct rxrpc_call_params {
670 s64 tx_total_len; /* Total Tx data length (if send data) */
671 unsigned long user_call_ID; /* User's call ID */
672 struct {
673 u32 hard; /* Maximum lifetime (sec) */
674 u32 idle; /* Max time since last data packet (msec) */
675 u32 normal; /* Max time since last call packet (msec) */
676 } timeouts;
677 u8 nr_timeouts; /* Number of timeouts specified */
678 };
679
680 struct rxrpc_send_params {
681 struct rxrpc_call_params call;
682 u32 abort_code; /* Abort code to Tx (if abort) */
683 enum rxrpc_command command : 8; /* The command to implement */
684 bool exclusive; /* Shared or exclusive call */
685 bool upgrade; /* If the connection is upgradeable */
686 };
687
688 #include <trace/events/rxrpc.h>
689
690 /*
691 * af_rxrpc.c
692 */
693 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
694 extern atomic_t rxrpc_debug_id;
695 extern struct workqueue_struct *rxrpc_workqueue;
696
697 /*
698 * call_accept.c
699 */
700 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
701 void rxrpc_discard_prealloc(struct rxrpc_sock *);
702 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
703 struct rxrpc_connection *,
704 struct sk_buff *);
705 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
706 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
707 rxrpc_notify_rx_t);
708 int rxrpc_reject_call(struct rxrpc_sock *);
709
710 /*
711 * call_event.c
712 */
713 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
714 enum rxrpc_propose_ack_trace);
715 void rxrpc_process_call(struct work_struct *);
716
717 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
718 unsigned long expire_at,
719 unsigned long now,
720 enum rxrpc_timer_trace why)
721 {
722 trace_rxrpc_timer(call, why, now);
723 timer_reduce(&call->timer, expire_at);
724 }
725
726 /*
727 * call_object.c
728 */
729 extern const char *const rxrpc_call_states[];
730 extern const char *const rxrpc_call_completions[];
731 extern unsigned int rxrpc_max_call_lifetime;
732 extern struct kmem_cache *rxrpc_call_jar;
733
734 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
735 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t);
736 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
737 struct rxrpc_conn_parameters *,
738 struct sockaddr_rxrpc *,
739 struct rxrpc_call_params *, gfp_t);
740 int rxrpc_retry_client_call(struct rxrpc_sock *,
741 struct rxrpc_call *,
742 struct rxrpc_conn_parameters *,
743 struct sockaddr_rxrpc *,
744 gfp_t);
745 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
746 struct sk_buff *);
747 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
748 int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *);
749 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
750 bool __rxrpc_queue_call(struct rxrpc_call *);
751 bool rxrpc_queue_call(struct rxrpc_call *);
752 void rxrpc_see_call(struct rxrpc_call *);
753 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
754 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
755 void rxrpc_cleanup_call(struct rxrpc_call *);
756 void rxrpc_destroy_all_calls(struct rxrpc_net *);
757
758 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
759 {
760 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
761 }
762
763 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
764 {
765 return !rxrpc_is_service_call(call);
766 }
767
768 /*
769 * Transition a call to the complete state.
770 */
771 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
772 enum rxrpc_call_completion compl,
773 u32 abort_code,
774 int error)
775 {
776 if (call->state < RXRPC_CALL_COMPLETE) {
777 call->abort_code = abort_code;
778 call->error = error;
779 call->completion = compl,
780 call->state = RXRPC_CALL_COMPLETE;
781 wake_up(&call->waitq);
782 return true;
783 }
784 return false;
785 }
786
787 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
788 enum rxrpc_call_completion compl,
789 u32 abort_code,
790 int error)
791 {
792 bool ret;
793
794 write_lock_bh(&call->state_lock);
795 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
796 write_unlock_bh(&call->state_lock);
797 return ret;
798 }
799
800 /*
801 * Record that a call successfully completed.
802 */
803 static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
804 {
805 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
806 }
807
808 static inline bool rxrpc_call_completed(struct rxrpc_call *call)
809 {
810 bool ret;
811
812 write_lock_bh(&call->state_lock);
813 ret = __rxrpc_call_completed(call);
814 write_unlock_bh(&call->state_lock);
815 return ret;
816 }
817
818 /*
819 * Record that a call is locally aborted.
820 */
821 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
822 rxrpc_seq_t seq,
823 u32 abort_code, int error)
824 {
825 trace_rxrpc_abort(why, call->cid, call->call_id, seq,
826 abort_code, error);
827 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
828 abort_code, error);
829 }
830
831 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
832 rxrpc_seq_t seq, u32 abort_code, int error)
833 {
834 bool ret;
835
836 write_lock_bh(&call->state_lock);
837 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
838 write_unlock_bh(&call->state_lock);
839 return ret;
840 }
841
842 /*
843 * Abort a call due to a protocol error.
844 */
845 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
846 struct sk_buff *skb,
847 const char *eproto_why,
848 const char *why,
849 u32 abort_code)
850 {
851 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
852
853 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
854 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
855 }
856
857 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
858 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
859 (abort_why), (abort_code))
860
861 /*
862 * conn_client.c
863 */
864 extern unsigned int rxrpc_max_client_connections;
865 extern unsigned int rxrpc_reap_client_connections;
866 extern unsigned long rxrpc_conn_idle_client_expiry;
867 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
868 extern struct idr rxrpc_client_conn_ids;
869
870 void rxrpc_destroy_client_conn_ids(void);
871 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
872 struct sockaddr_rxrpc *, gfp_t);
873 void rxrpc_expose_client_call(struct rxrpc_call *);
874 void rxrpc_disconnect_client_call(struct rxrpc_call *);
875 void rxrpc_put_client_conn(struct rxrpc_connection *);
876 void rxrpc_discard_expired_client_conns(struct work_struct *);
877 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
878
879 /*
880 * conn_event.c
881 */
882 void rxrpc_process_connection(struct work_struct *);
883
884 /*
885 * conn_object.c
886 */
887 extern unsigned int rxrpc_connection_expiry;
888 extern unsigned int rxrpc_closed_conn_expiry;
889
890 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
891 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
892 struct sk_buff *);
893 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
894 void rxrpc_disconnect_call(struct rxrpc_call *);
895 void rxrpc_kill_connection(struct rxrpc_connection *);
896 bool rxrpc_queue_conn(struct rxrpc_connection *);
897 void rxrpc_see_connection(struct rxrpc_connection *);
898 void rxrpc_get_connection(struct rxrpc_connection *);
899 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
900 void rxrpc_put_service_conn(struct rxrpc_connection *);
901 void rxrpc_service_connection_reaper(struct work_struct *);
902 void rxrpc_destroy_all_connections(struct rxrpc_net *);
903
904 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
905 {
906 return conn->out_clientflag;
907 }
908
909 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
910 {
911 return !rxrpc_conn_is_client(conn);
912 }
913
914 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
915 {
916 if (!conn)
917 return;
918
919 if (rxrpc_conn_is_client(conn))
920 rxrpc_put_client_conn(conn);
921 else
922 rxrpc_put_service_conn(conn);
923 }
924
925 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
926 unsigned long expire_at)
927 {
928 timer_reduce(&conn->timer, expire_at);
929 }
930
931 /*
932 * conn_service.c
933 */
934 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
935 struct sk_buff *);
936 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
937 void rxrpc_new_incoming_connection(struct rxrpc_sock *,
938 struct rxrpc_connection *, struct sk_buff *);
939 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
940
941 /*
942 * input.c
943 */
944 void rxrpc_data_ready(struct sock *);
945
946 /*
947 * insecure.c
948 */
949 extern const struct rxrpc_security rxrpc_no_security;
950
951 /*
952 * key.c
953 */
954 extern struct key_type key_type_rxrpc;
955 extern struct key_type key_type_rxrpc_s;
956
957 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
958 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
959 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
960 u32);
961
962 /*
963 * local_event.c
964 */
965 extern void rxrpc_process_local_events(struct rxrpc_local *);
966
967 /*
968 * local_object.c
969 */
970 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
971 void __rxrpc_put_local(struct rxrpc_local *);
972 void rxrpc_destroy_all_locals(struct rxrpc_net *);
973
974 static inline void rxrpc_get_local(struct rxrpc_local *local)
975 {
976 atomic_inc(&local->usage);
977 }
978
979 static inline
980 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
981 {
982 return atomic_inc_not_zero(&local->usage) ? local : NULL;
983 }
984
985 static inline void rxrpc_put_local(struct rxrpc_local *local)
986 {
987 if (local && atomic_dec_and_test(&local->usage))
988 __rxrpc_put_local(local);
989 }
990
991 static inline void rxrpc_queue_local(struct rxrpc_local *local)
992 {
993 rxrpc_queue_work(&local->processor);
994 }
995
996 /*
997 * misc.c
998 */
999 extern unsigned int rxrpc_max_backlog __read_mostly;
1000 extern unsigned long rxrpc_requested_ack_delay;
1001 extern unsigned long rxrpc_soft_ack_delay;
1002 extern unsigned long rxrpc_idle_ack_delay;
1003 extern unsigned int rxrpc_rx_window_size;
1004 extern unsigned int rxrpc_rx_mtu;
1005 extern unsigned int rxrpc_rx_jumbo_max;
1006 extern unsigned long rxrpc_resend_timeout;
1007
1008 extern const s8 rxrpc_ack_priority[];
1009
1010 /*
1011 * net_ns.c
1012 */
1013 extern unsigned int rxrpc_net_id;
1014 extern struct pernet_operations rxrpc_net_ops;
1015
1016 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1017 {
1018 return net_generic(net, rxrpc_net_id);
1019 }
1020
1021 /*
1022 * output.c
1023 */
1024 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
1025 int rxrpc_send_abort_packet(struct rxrpc_call *);
1026 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
1027 void rxrpc_reject_packets(struct rxrpc_local *);
1028
1029 /*
1030 * peer_event.c
1031 */
1032 void rxrpc_error_report(struct sock *);
1033 void rxrpc_peer_error_distributor(struct work_struct *);
1034 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1035 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1036
1037 /*
1038 * peer_object.c
1039 */
1040 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1041 const struct sockaddr_rxrpc *);
1042 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
1043 struct sockaddr_rxrpc *, gfp_t);
1044 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1045 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *,
1046 struct rxrpc_peer *);
1047
1048 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer)
1049 {
1050 atomic_inc(&peer->usage);
1051 return peer;
1052 }
1053
1054 static inline
1055 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
1056 {
1057 return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
1058 }
1059
1060 extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
1061 static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
1062 {
1063 if (peer && atomic_dec_and_test(&peer->usage))
1064 __rxrpc_put_peer(peer);
1065 }
1066
1067 /*
1068 * proc.c
1069 */
1070 extern const struct file_operations rxrpc_call_seq_fops;
1071 extern const struct file_operations rxrpc_connection_seq_fops;
1072
1073 /*
1074 * recvmsg.c
1075 */
1076 void rxrpc_notify_socket(struct rxrpc_call *);
1077 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1078
1079 /*
1080 * rxkad.c
1081 */
1082 #ifdef CONFIG_RXKAD
1083 extern const struct rxrpc_security rxkad;
1084 #endif
1085
1086 /*
1087 * security.c
1088 */
1089 int __init rxrpc_init_security(void);
1090 void rxrpc_exit_security(void);
1091 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1092 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
1093
1094 /*
1095 * sendmsg.c
1096 */
1097 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1098
1099 /*
1100 * skbuff.c
1101 */
1102 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1103 void rxrpc_packet_destructor(struct sk_buff *);
1104 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1105 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1106 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1107 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1108 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
1109 void rxrpc_purge_queue(struct sk_buff_head *);
1110
1111 /*
1112 * sysctl.c
1113 */
1114 #ifdef CONFIG_SYSCTL
1115 extern int __init rxrpc_sysctl_init(void);
1116 extern void rxrpc_sysctl_exit(void);
1117 #else
1118 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1119 static inline void rxrpc_sysctl_exit(void) {}
1120 #endif
1121
1122 /*
1123 * utils.c
1124 */
1125 int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *,
1126 struct sk_buff *);
1127
1128 static inline bool before(u32 seq1, u32 seq2)
1129 {
1130 return (s32)(seq1 - seq2) < 0;
1131 }
1132 static inline bool before_eq(u32 seq1, u32 seq2)
1133 {
1134 return (s32)(seq1 - seq2) <= 0;
1135 }
1136 static inline bool after(u32 seq1, u32 seq2)
1137 {
1138 return (s32)(seq1 - seq2) > 0;
1139 }
1140 static inline bool after_eq(u32 seq1, u32 seq2)
1141 {
1142 return (s32)(seq1 - seq2) >= 0;
1143 }
1144
1145 /*
1146 * debug tracing
1147 */
1148 extern unsigned int rxrpc_debug;
1149
1150 #define dbgprintk(FMT,...) \
1151 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1152
1153 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1154 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1155 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1156 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1157 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1158
1159
1160 #if defined(__KDEBUG)
1161 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1162 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1163 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1164 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1165 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1166
1167 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1168 #define RXRPC_DEBUG_KENTER 0x01
1169 #define RXRPC_DEBUG_KLEAVE 0x02
1170 #define RXRPC_DEBUG_KDEBUG 0x04
1171 #define RXRPC_DEBUG_KPROTO 0x08
1172 #define RXRPC_DEBUG_KNET 0x10
1173
1174 #define _enter(FMT,...) \
1175 do { \
1176 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1177 kenter(FMT,##__VA_ARGS__); \
1178 } while (0)
1179
1180 #define _leave(FMT,...) \
1181 do { \
1182 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1183 kleave(FMT,##__VA_ARGS__); \
1184 } while (0)
1185
1186 #define _debug(FMT,...) \
1187 do { \
1188 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1189 kdebug(FMT,##__VA_ARGS__); \
1190 } while (0)
1191
1192 #define _proto(FMT,...) \
1193 do { \
1194 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1195 kproto(FMT,##__VA_ARGS__); \
1196 } while (0)
1197
1198 #define _net(FMT,...) \
1199 do { \
1200 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1201 knet(FMT,##__VA_ARGS__); \
1202 } while (0)
1203
1204 #else
1205 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1206 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1207 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1208 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1209 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1210 #endif
1211
1212 /*
1213 * debug assertion checking
1214 */
1215 #if 1 // defined(__KDEBUGALL)
1216
1217 #define ASSERT(X) \
1218 do { \
1219 if (unlikely(!(X))) { \
1220 pr_err("Assertion failed\n"); \
1221 BUG(); \
1222 } \
1223 } while (0)
1224
1225 #define ASSERTCMP(X, OP, Y) \
1226 do { \
1227 __typeof__(X) _x = (X); \
1228 __typeof__(Y) _y = (__typeof__(X))(Y); \
1229 if (unlikely(!(_x OP _y))) { \
1230 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1231 (unsigned long)_x, (unsigned long)_x, #OP, \
1232 (unsigned long)_y, (unsigned long)_y); \
1233 BUG(); \
1234 } \
1235 } while (0)
1236
1237 #define ASSERTIF(C, X) \
1238 do { \
1239 if (unlikely((C) && !(X))) { \
1240 pr_err("Assertion failed\n"); \
1241 BUG(); \
1242 } \
1243 } while (0)
1244
1245 #define ASSERTIFCMP(C, X, OP, Y) \
1246 do { \
1247 __typeof__(X) _x = (X); \
1248 __typeof__(Y) _y = (__typeof__(X))(Y); \
1249 if (unlikely((C) && !(_x OP _y))) { \
1250 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1251 (unsigned long)_x, (unsigned long)_x, #OP, \
1252 (unsigned long)_y, (unsigned long)_y); \
1253 BUG(); \
1254 } \
1255 } while (0)
1256
1257 #else
1258
1259 #define ASSERT(X) \
1260 do { \
1261 } while (0)
1262
1263 #define ASSERTCMP(X, OP, Y) \
1264 do { \
1265 } while (0)
1266
1267 #define ASSERTIF(C, X) \
1268 do { \
1269 } while (0)
1270
1271 #define ASSERTIFCMP(C, X, OP, Y) \
1272 do { \
1273 } while (0)
1274
1275 #endif /* __KDEBUGALL */
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