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