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