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ARM: dma-api: fix max_pfn off-by-one error in __dma_supported()
[linux/fpc-iii.git] / net / rxrpc / ar-internal.h
blob5e99df80e80a775b26e0de82eec5738454398abc
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* AF_RXRPC internal definitions
3 *
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #include <linux/atomic.h>
9 #include <linux/seqlock.h>
10 #include <net/net_namespace.h>
11 #include <net/netns/generic.h>
12 #include <net/sock.h>
13 #include <net/af_rxrpc.h>
14 #include "protocol.h"
15
16 #if 0
17 #define CHECK_SLAB_OKAY(X) \
18 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
19 (POISON_FREE << 8 | POISON_FREE))
20 #else
21 #define CHECK_SLAB_OKAY(X) do {} while (0)
22 #endif
23
24 #define FCRYPT_BSIZE 8
25 struct rxrpc_crypt {
26 union {
27 u8 x[FCRYPT_BSIZE];
28 __be32 n[2];
29 };
30 } __attribute__((aligned(8)));
31
32 #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS))
33 #define rxrpc_queue_delayed_work(WS,D) \
34 queue_delayed_work(rxrpc_workqueue, (WS), (D))
35
36 struct rxrpc_connection;
37
38 /*
39 * Mark applied to socket buffers in skb->mark. skb->priority is used
40 * to pass supplementary information.
41 */
42 enum rxrpc_skb_mark {
43 RXRPC_SKB_MARK_REJECT_BUSY, /* Reject with BUSY */
44 RXRPC_SKB_MARK_REJECT_ABORT, /* Reject with ABORT (code in skb->priority) */
45 };
46
47 /*
48 * sk_state for RxRPC sockets
49 */
50 enum {
51 RXRPC_UNBOUND = 0,
52 RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */
53 RXRPC_CLIENT_BOUND, /* client local address bound */
54 RXRPC_SERVER_BOUND, /* server local address bound */
55 RXRPC_SERVER_BOUND2, /* second server local address bound */
56 RXRPC_SERVER_LISTENING, /* server listening for connections */
57 RXRPC_SERVER_LISTEN_DISABLED, /* server listening disabled */
58 RXRPC_CLOSE, /* socket is being closed */
59 };
60
61 /*
62 * Per-network namespace data.
63 */
64 struct rxrpc_net {
65 struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
66 u32 epoch; /* Local epoch for detecting local-end reset */
67 struct list_head calls; /* List of calls active in this namespace */
68 rwlock_t call_lock; /* Lock for ->calls */
69 atomic_t nr_calls; /* Count of allocated calls */
70
71 atomic_t nr_conns;
72 struct list_head conn_proc_list; /* List of conns in this namespace for proc */
73 struct list_head service_conns; /* Service conns in this namespace */
74 rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
75 struct work_struct service_conn_reaper;
76 struct timer_list service_conn_reap_timer;
77
78 unsigned int nr_client_conns;
79 unsigned int nr_active_client_conns;
80 bool kill_all_client_conns;
81 bool live;
82 spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
83 spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
84 struct list_head waiting_client_conns;
85 struct list_head active_client_conns;
86 struct list_head idle_client_conns;
87 struct work_struct client_conn_reaper;
88 struct timer_list client_conn_reap_timer;
89
90 struct list_head local_endpoints;
91 struct mutex local_mutex; /* Lock for ->local_endpoints */
92
93 DECLARE_HASHTABLE (peer_hash, 10);
94 spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
95
96 #define RXRPC_KEEPALIVE_TIME 20 /* NAT keepalive time in seconds */
97 u8 peer_keepalive_cursor;
98 time64_t peer_keepalive_base;
99 struct list_head peer_keepalive[32];
100 struct list_head peer_keepalive_new;
101 struct timer_list peer_keepalive_timer;
102 struct work_struct peer_keepalive_work;
103 };
104
105 /*
106 * Service backlog preallocation.
107 *
108 * This contains circular buffers of preallocated peers, connections and calls
109 * for incoming service calls and their head and tail pointers. This allows
110 * calls to be set up in the data_ready handler, thereby avoiding the need to
111 * shuffle packets around so much.
112 */
113 struct rxrpc_backlog {
114 unsigned short peer_backlog_head;
115 unsigned short peer_backlog_tail;
116 unsigned short conn_backlog_head;
117 unsigned short conn_backlog_tail;
118 unsigned short call_backlog_head;
119 unsigned short call_backlog_tail;
120 #define RXRPC_BACKLOG_MAX 32
121 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
122 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
123 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
124 };
125
126 /*
127 * RxRPC socket definition
128 */
129 struct rxrpc_sock {
130 /* WARNING: sk has to be the first member */
131 struct sock sk;
132 rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
133 rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
134 struct rxrpc_local *local; /* local endpoint */
135 struct rxrpc_backlog *backlog; /* Preallocation for services */
136 spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */
137 struct list_head sock_calls; /* List of calls owned by this socket */
138 struct list_head to_be_accepted; /* calls awaiting acceptance */
139 struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */
140 rwlock_t recvmsg_lock; /* Lock for recvmsg_q */
141 struct key *key; /* security for this socket */
142 struct key *securities; /* list of server security descriptors */
143 struct rb_root calls; /* User ID -> call mapping */
144 unsigned long flags;
145 #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */
146 rwlock_t call_lock; /* lock for calls */
147 u32 min_sec_level; /* minimum security level */
148 #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
149 bool exclusive; /* Exclusive connection for a client socket */
150 u16 second_service; /* Additional service bound to the endpoint */
151 struct {
152 /* Service upgrade information */
153 u16 from; /* Service ID to upgrade (if not 0) */
154 u16 to; /* service ID to upgrade to */
155 } service_upgrade;
156 sa_family_t family; /* Protocol family created with */
157 struct sockaddr_rxrpc srx; /* Primary Service/local addresses */
158 struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */
159 };
160
161 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
162
163 /*
164 * CPU-byteorder normalised Rx packet header.
165 */
166 struct rxrpc_host_header {
167 u32 epoch; /* client boot timestamp */
168 u32 cid; /* connection and channel ID */
169 u32 callNumber; /* call ID (0 for connection-level packets) */
170 u32 seq; /* sequence number of pkt in call stream */
171 u32 serial; /* serial number of pkt sent to network */
172 u8 type; /* packet type */
173 u8 flags; /* packet flags */
174 u8 userStatus; /* app-layer defined status */
175 u8 securityIndex; /* security protocol ID */
176 union {
177 u16 _rsvd; /* reserved */
178 u16 cksum; /* kerberos security checksum */
179 };
180 u16 serviceId; /* service ID */
181 } __packed;
182
183 /*
184 * RxRPC socket buffer private variables
185 * - max 48 bytes (struct sk_buff::cb)
186 */
187 struct rxrpc_skb_priv {
188 atomic_t nr_ring_pins; /* Number of rxtx ring pins */
189 u8 nr_subpackets; /* Number of subpackets */
190 u8 rx_flags; /* Received packet flags */
191 #define RXRPC_SKB_INCL_LAST 0x01 /* - Includes last packet */
192 #define RXRPC_SKB_TX_BUFFER 0x02 /* - Is transmit buffer */
193 union {
194 int remain; /* amount of space remaining for next write */
195
196 /* List of requested ACKs on subpackets */
197 unsigned long rx_req_ack[(RXRPC_MAX_NR_JUMBO + BITS_PER_LONG - 1) /
198 BITS_PER_LONG];
199 };
200
201 struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */
202 };
203
204 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
205
206 /*
207 * RxRPC security module interface
208 */
209 struct rxrpc_security {
210 const char *name; /* name of this service */
211 u8 security_index; /* security type provided */
212 u32 no_key_abort; /* Abort code indicating no key */
213
214 /* Initialise a security service */
215 int (*init)(void);
216
217 /* Clean up a security service */
218 void (*exit)(void);
219
220 /* initialise a connection's security */
221 int (*init_connection_security)(struct rxrpc_connection *);
222
223 /* prime a connection's packet security */
224 int (*prime_packet_security)(struct rxrpc_connection *);
225
226 /* impose security on a packet */
227 int (*secure_packet)(struct rxrpc_call *,
228 struct sk_buff *,
229 size_t,
230 void *);
231
232 /* verify the security on a received packet */
233 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
234 unsigned int, unsigned int, rxrpc_seq_t, u16);
235
236 /* Free crypto request on a call */
237 void (*free_call_crypto)(struct rxrpc_call *);
238
239 /* Locate the data in a received packet that has been verified. */
240 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
241 unsigned int *, unsigned int *);
242
243 /* issue a challenge */
244 int (*issue_challenge)(struct rxrpc_connection *);
245
246 /* respond to a challenge */
247 int (*respond_to_challenge)(struct rxrpc_connection *,
248 struct sk_buff *,
249 u32 *);
250
251 /* verify a response */
252 int (*verify_response)(struct rxrpc_connection *,
253 struct sk_buff *,
254 u32 *);
255
256 /* clear connection security */
257 void (*clear)(struct rxrpc_connection *);
258 };
259
260 /*
261 * RxRPC local transport endpoint description
262 * - owned by a single AF_RXRPC socket
263 * - pointed to by transport socket struct sk_user_data
264 */
265 struct rxrpc_local {
266 struct rcu_head rcu;
267 atomic_t active_users; /* Number of users of the local endpoint */
268 atomic_t usage; /* Number of references to the structure */
269 struct rxrpc_net *rxnet; /* The network ns in which this resides */
270 struct list_head link;
271 struct socket *socket; /* my UDP socket */
272 struct work_struct processor;
273 struct rxrpc_sock __rcu *service; /* Service(s) listening on this endpoint */
274 struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */
275 struct sk_buff_head reject_queue; /* packets awaiting rejection */
276 struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */
277 struct rb_root client_conns; /* Client connections by socket params */
278 spinlock_t client_conns_lock; /* Lock for client_conns */
279 spinlock_t lock; /* access lock */
280 rwlock_t services_lock; /* lock for services list */
281 int debug_id; /* debug ID for printks */
282 bool dead;
283 bool service_closed; /* Service socket closed */
284 struct sockaddr_rxrpc srx; /* local address */
285 };
286
287 /*
288 * RxRPC remote transport endpoint definition
289 * - matched by local endpoint, remote port, address and protocol type
290 */
291 struct rxrpc_peer {
292 struct rcu_head rcu; /* This must be first */
293 atomic_t usage;
294 unsigned long hash_key;
295 struct hlist_node hash_link;
296 struct rxrpc_local *local;
297 struct hlist_head error_targets; /* targets for net error distribution */
298 struct rb_root service_conns; /* Service connections */
299 struct list_head keepalive_link; /* Link in net->peer_keepalive[] */
300 time64_t last_tx_at; /* Last time packet sent here */
301 seqlock_t service_conn_lock;
302 spinlock_t lock; /* access lock */
303 unsigned int if_mtu; /* interface MTU for this peer */
304 unsigned int mtu; /* network MTU for this peer */
305 unsigned int maxdata; /* data size (MTU - hdrsize) */
306 unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
307 int debug_id; /* debug ID for printks */
308 struct sockaddr_rxrpc srx; /* remote address */
309
310 /* calculated RTT cache */
311 #define RXRPC_RTT_CACHE_SIZE 32
312 spinlock_t rtt_input_lock; /* RTT lock for input routine */
313 ktime_t rtt_last_req; /* Time of last RTT request */
314 u64 rtt; /* Current RTT estimate (in nS) */
315 u64 rtt_sum; /* Sum of cache contents */
316 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* Determined RTT cache */
317 u8 rtt_cursor; /* next entry at which to insert */
318 u8 rtt_usage; /* amount of cache actually used */
319
320 u8 cong_cwnd; /* Congestion window size */
321 };
322
323 /*
324 * Keys for matching a connection.
325 */
326 struct rxrpc_conn_proto {
327 union {
328 struct {
329 u32 epoch; /* epoch of this connection */
330 u32 cid; /* connection ID */
331 };
332 u64 index_key;
333 };
334 };
335
336 struct rxrpc_conn_parameters {
337 struct rxrpc_local *local; /* Representation of local endpoint */
338 struct rxrpc_peer *peer; /* Remote endpoint */
339 struct key *key; /* Security details */
340 bool exclusive; /* T if conn is exclusive */
341 bool upgrade; /* T if service ID can be upgraded */
342 u16 service_id; /* Service ID for this connection */
343 u32 security_level; /* Security level selected */
344 };
345
346 /*
347 * Bits in the connection flags.
348 */
349 enum rxrpc_conn_flag {
350 RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */
351 RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */
352 RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */
353 RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */
354 RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */
355 RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */
356 RXRPC_CONN_PROBING_FOR_UPGRADE, /* Probing for service upgrade */
357 RXRPC_CONN_FINAL_ACK_0, /* Need final ACK for channel 0 */
358 RXRPC_CONN_FINAL_ACK_1, /* Need final ACK for channel 1 */
359 RXRPC_CONN_FINAL_ACK_2, /* Need final ACK for channel 2 */
360 RXRPC_CONN_FINAL_ACK_3, /* Need final ACK for channel 3 */
361 };
362
363 #define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
364 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
365 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
366 (1UL << RXRPC_CONN_FINAL_ACK_3))
367
368 /*
369 * Events that can be raised upon a connection.
370 */
371 enum rxrpc_conn_event {
372 RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */
373 };
374
375 /*
376 * The connection cache state.
377 */
378 enum rxrpc_conn_cache_state {
379 RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */
380 RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */
381 RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */
382 RXRPC_CONN_CLIENT_UPGRADE, /* Conn is on active list, probing for upgrade */
383 RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */
384 RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */
385 RXRPC_CONN__NR_CACHE_STATES
386 };
387
388 /*
389 * The connection protocol state.
390 */
391 enum rxrpc_conn_proto_state {
392 RXRPC_CONN_UNUSED, /* Connection not yet attempted */
393 RXRPC_CONN_CLIENT, /* Client connection */
394 RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */
395 RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */
396 RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
397 RXRPC_CONN_SERVICE, /* Service secured connection */
398 RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */
399 RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */
400 RXRPC_CONN__NR_STATES
401 };
402
403 /*
404 * RxRPC connection definition
405 * - matched by { local, peer, epoch, conn_id, direction }
406 * - each connection can only handle four simultaneous calls
407 */
408 struct rxrpc_connection {
409 struct rxrpc_conn_proto proto;
410 struct rxrpc_conn_parameters params;
411
412 atomic_t usage;
413 struct rcu_head rcu;
414 struct list_head cache_link;
415
416 spinlock_t channel_lock;
417 unsigned char active_chans; /* Mask of active channels */
418 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
419 struct list_head waiting_calls; /* Calls waiting for channels */
420 struct rxrpc_channel {
421 unsigned long final_ack_at; /* Time at which to issue final ACK */
422 struct rxrpc_call __rcu *call; /* Active call */
423 unsigned int call_debug_id; /* call->debug_id */
424 u32 call_id; /* ID of current call */
425 u32 call_counter; /* Call ID counter */
426 u32 last_call; /* ID of last call */
427 u8 last_type; /* Type of last packet */
428 union {
429 u32 last_seq;
430 u32 last_abort;
431 };
432 } channels[RXRPC_MAXCALLS];
433
434 struct timer_list timer; /* Conn event timer */
435 struct work_struct processor; /* connection event processor */
436 union {
437 struct rb_node client_node; /* Node in local->client_conns */
438 struct rb_node service_node; /* Node in peer->service_conns */
439 };
440 struct list_head proc_link; /* link in procfs list */
441 struct list_head link; /* link in master connection list */
442 struct sk_buff_head rx_queue; /* received conn-level packets */
443 const struct rxrpc_security *security; /* applied security module */
444 struct key *server_key; /* security for this service */
445 struct crypto_sync_skcipher *cipher; /* encryption handle */
446 struct rxrpc_crypt csum_iv; /* packet checksum base */
447 unsigned long flags;
448 unsigned long events;
449 unsigned long idle_timestamp; /* Time at which last became idle */
450 spinlock_t state_lock; /* state-change lock */
451 enum rxrpc_conn_cache_state cache_state;
452 enum rxrpc_conn_proto_state state; /* current state of connection */
453 u32 abort_code; /* Abort code of connection abort */
454 int debug_id; /* debug ID for printks */
455 atomic_t serial; /* packet serial number counter */
456 unsigned int hi_serial; /* highest serial number received */
457 u32 security_nonce; /* response re-use preventer */
458 u32 service_id; /* Service ID, possibly upgraded */
459 u8 size_align; /* data size alignment (for security) */
460 u8 security_size; /* security header size */
461 u8 security_ix; /* security type */
462 u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
463 short error; /* Local error code */
464 };
465
466 static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
467 {
468 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
469 }
470
471 static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
472 {
473 return !rxrpc_to_server(sp);
474 }
475
476 /*
477 * Flags in call->flags.
478 */
479 enum rxrpc_call_flag {
480 RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */
481 RXRPC_CALL_HAS_USERID, /* has a user ID attached */
482 RXRPC_CALL_IS_SERVICE, /* Call is service call */
483 RXRPC_CALL_EXPOSED, /* The call was exposed to the world */
484 RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */
485 RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */
486 RXRPC_CALL_SEND_PING, /* A ping will need to be sent */
487 RXRPC_CALL_PINGING, /* Ping in process */
488 RXRPC_CALL_RETRANS_TIMEOUT, /* Retransmission due to timeout occurred */
489 RXRPC_CALL_BEGAN_RX_TIMER, /* We began the expect_rx_by timer */
490 RXRPC_CALL_RX_HEARD, /* The peer responded at least once to this call */
491 RXRPC_CALL_RX_UNDERRUN, /* Got data underrun */
492 RXRPC_CALL_IS_INTR, /* The call is interruptible */
493 };
494
495 /*
496 * Events that can be raised on a call.
497 */
498 enum rxrpc_call_event {
499 RXRPC_CALL_EV_ACK, /* need to generate ACK */
500 RXRPC_CALL_EV_ABORT, /* need to generate abort */
501 RXRPC_CALL_EV_RESEND, /* Tx resend required */
502 RXRPC_CALL_EV_PING, /* Ping send required */
503 RXRPC_CALL_EV_EXPIRED, /* Expiry occurred */
504 RXRPC_CALL_EV_ACK_LOST, /* ACK may be lost, send ping */
505 };
506
507 /*
508 * The states that a call can be in.
509 */
510 enum rxrpc_call_state {
511 RXRPC_CALL_UNINITIALISED,
512 RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */
513 RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
514 RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */
515 RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */
516 RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */
517 RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */
518 RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */
519 RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
520 RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */
521 RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */
522 RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */
523 RXRPC_CALL_COMPLETE, /* - call complete */
524 NR__RXRPC_CALL_STATES
525 };
526
527 /*
528 * Call completion condition (state == RXRPC_CALL_COMPLETE).
529 */
530 enum rxrpc_call_completion {
531 RXRPC_CALL_SUCCEEDED, /* - Normal termination */
532 RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */
533 RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */
534 RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */
535 RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */
536 NR__RXRPC_CALL_COMPLETIONS
537 };
538
539 /*
540 * Call Tx congestion management modes.
541 */
542 enum rxrpc_congest_mode {
543 RXRPC_CALL_SLOW_START,
544 RXRPC_CALL_CONGEST_AVOIDANCE,
545 RXRPC_CALL_PACKET_LOSS,
546 RXRPC_CALL_FAST_RETRANSMIT,
547 NR__RXRPC_CONGEST_MODES
548 };
549
550 /*
551 * RxRPC call definition
552 * - matched by { connection, call_id }
553 */
554 struct rxrpc_call {
555 struct rcu_head rcu;
556 struct rxrpc_connection *conn; /* connection carrying call */
557 struct rxrpc_peer *peer; /* Peer record for remote address */
558 struct rxrpc_sock __rcu *socket; /* socket responsible */
559 struct rxrpc_net *rxnet; /* Network namespace to which call belongs */
560 const struct rxrpc_security *security; /* applied security module */
561 struct mutex user_mutex; /* User access mutex */
562 unsigned long ack_at; /* When deferred ACK needs to happen */
563 unsigned long ack_lost_at; /* When ACK is figured as lost */
564 unsigned long resend_at; /* When next resend needs to happen */
565 unsigned long ping_at; /* When next to send a ping */
566 unsigned long keepalive_at; /* When next to send a keepalive ping */
567 unsigned long expect_rx_by; /* When we expect to get a packet by */
568 unsigned long expect_req_by; /* When we expect to get a request DATA packet by */
569 unsigned long expect_term_by; /* When we expect call termination by */
570 u32 next_rx_timo; /* Timeout for next Rx packet (jif) */
571 u32 next_req_timo; /* Timeout for next Rx request packet (jif) */
572 struct skcipher_request *cipher_req; /* Packet cipher request buffer */
573 struct timer_list timer; /* Combined event timer */
574 struct work_struct processor; /* Event processor */
575 rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */
576 struct list_head link; /* link in master call list */
577 struct list_head chan_wait_link; /* Link in conn->waiting_calls */
578 struct hlist_node error_link; /* link in error distribution list */
579 struct list_head accept_link; /* Link in rx->acceptq */
580 struct list_head recvmsg_link; /* Link in rx->recvmsg_q */
581 struct list_head sock_link; /* Link in rx->sock_calls */
582 struct rb_node sock_node; /* Node in rx->calls */
583 struct sk_buff *tx_pending; /* Tx socket buffer being filled */
584 wait_queue_head_t waitq; /* Wait queue for channel or Tx */
585 s64 tx_total_len; /* Total length left to be transmitted (or -1) */
586 __be32 crypto_buf[2]; /* Temporary packet crypto buffer */
587 unsigned long user_call_ID; /* user-defined call ID */
588 unsigned long flags;
589 unsigned long events;
590 spinlock_t lock;
591 spinlock_t notify_lock; /* Kernel notification lock */
592 rwlock_t state_lock; /* lock for state transition */
593 u32 abort_code; /* Local/remote abort code */
594 int error; /* Local error incurred */
595 enum rxrpc_call_state state; /* current state of call */
596 enum rxrpc_call_completion completion; /* Call completion condition */
597 atomic_t usage;
598 u16 service_id; /* service ID */
599 u8 security_ix; /* Security type */
600 u32 call_id; /* call ID on connection */
601 u32 cid; /* connection ID plus channel index */
602 int debug_id; /* debug ID for printks */
603 unsigned short rx_pkt_offset; /* Current recvmsg packet offset */
604 unsigned short rx_pkt_len; /* Current recvmsg packet len */
605 bool rx_pkt_last; /* Current recvmsg packet is last */
606
607 /* Rx/Tx circular buffer, depending on phase.
608 *
609 * In the Rx phase, packets are annotated with 0 or the number of the
610 * segment of a jumbo packet each buffer refers to. There can be up to
611 * 47 segments in a maximum-size UDP packet.
612 *
613 * In the Tx phase, packets are annotated with which buffers have been
614 * acked.
615 */
616 #define RXRPC_RXTX_BUFF_SIZE 64
617 #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
618 #define RXRPC_INIT_RX_WINDOW_SIZE 63
619 struct sk_buff **rxtx_buffer;
620 u8 *rxtx_annotations;
621 #define RXRPC_TX_ANNO_ACK 0
622 #define RXRPC_TX_ANNO_UNACK 1
623 #define RXRPC_TX_ANNO_NAK 2
624 #define RXRPC_TX_ANNO_RETRANS 3
625 #define RXRPC_TX_ANNO_MASK 0x03
626 #define RXRPC_TX_ANNO_LAST 0x04
627 #define RXRPC_TX_ANNO_RESENT 0x08
628
629 #define RXRPC_RX_ANNO_SUBPACKET 0x3f /* Subpacket number in jumbogram */
630 #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */
631 rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but
632 * not hard-ACK'd packet follows this.
633 */
634 rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */
635 u16 tx_backoff; /* Delay to insert due to Tx failure */
636
637 /* TCP-style slow-start congestion control [RFC5681]. Since the SMSS
638 * is fixed, we keep these numbers in terms of segments (ie. DATA
639 * packets) rather than bytes.
640 */
641 #define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
642 u8 cong_cwnd; /* Congestion window size */
643 u8 cong_extra; /* Extra to send for congestion management */
644 u8 cong_ssthresh; /* Slow-start threshold */
645 enum rxrpc_congest_mode cong_mode:8; /* Congestion management mode */
646 u8 cong_dup_acks; /* Count of ACKs showing missing packets */
647 u8 cong_cumul_acks; /* Cumulative ACK count */
648 ktime_t cong_tstamp; /* Last time cwnd was changed */
649
650 rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not
651 * consumed packet follows this.
652 */
653 rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */
654 rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */
655 rxrpc_serial_t rx_serial; /* Highest serial received for this call */
656 u8 rx_winsize; /* Size of Rx window */
657 u8 tx_winsize; /* Maximum size of Tx window */
658 bool tx_phase; /* T if transmission phase, F if receive phase */
659 u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */
660
661 spinlock_t input_lock; /* Lock for packet input to this call */
662
663 /* receive-phase ACK management */
664 u8 ackr_reason; /* reason to ACK */
665 rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */
666 rxrpc_serial_t ackr_first_seq; /* first sequence number received */
667 rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */
668 rxrpc_seq_t ackr_consumed; /* Highest packet shown consumed */
669 rxrpc_seq_t ackr_seen; /* Highest packet shown seen */
670
671 /* ping management */
672 rxrpc_serial_t ping_serial; /* Last ping sent */
673 ktime_t ping_time; /* Time last ping sent */
674
675 /* transmission-phase ACK management */
676 ktime_t acks_latest_ts; /* Timestamp of latest ACK received */
677 rxrpc_serial_t acks_latest; /* serial number of latest ACK received */
678 rxrpc_seq_t acks_lowest_nak; /* Lowest NACK in the buffer (or ==tx_hard_ack) */
679 rxrpc_seq_t acks_lost_top; /* tx_top at the time lost-ack ping sent */
680 rxrpc_serial_t acks_lost_ping; /* Serial number of probe ACK */
681 };
682
683 /*
684 * Summary of a new ACK and the changes it made to the Tx buffer packet states.
685 */
686 struct rxrpc_ack_summary {
687 u8 ack_reason;
688 u8 nr_acks; /* Number of ACKs in packet */
689 u8 nr_nacks; /* Number of NACKs in packet */
690 u8 nr_new_acks; /* Number of new ACKs in packet */
691 u8 nr_new_nacks; /* Number of new NACKs in packet */
692 u8 nr_rot_new_acks; /* Number of rotated new ACKs */
693 bool new_low_nack; /* T if new low NACK found */
694 bool retrans_timeo; /* T if reTx due to timeout happened */
695 u8 flight_size; /* Number of unreceived transmissions */
696 /* Place to stash values for tracing */
697 enum rxrpc_congest_mode mode:8;
698 u8 cwnd;
699 u8 ssthresh;
700 u8 dup_acks;
701 u8 cumulative_acks;
702 };
703
704 /*
705 * sendmsg() cmsg-specified parameters.
706 */
707 enum rxrpc_command {
708 RXRPC_CMD_SEND_DATA, /* send data message */
709 RXRPC_CMD_SEND_ABORT, /* request abort generation */
710 RXRPC_CMD_ACCEPT, /* [server] accept incoming call */
711 RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */
712 };
713
714 struct rxrpc_call_params {
715 s64 tx_total_len; /* Total Tx data length (if send data) */
716 unsigned long user_call_ID; /* User's call ID */
717 struct {
718 u32 hard; /* Maximum lifetime (sec) */
719 u32 idle; /* Max time since last data packet (msec) */
720 u32 normal; /* Max time since last call packet (msec) */
721 } timeouts;
722 u8 nr_timeouts; /* Number of timeouts specified */
723 bool intr; /* The call is interruptible */
724 };
725
726 struct rxrpc_send_params {
727 struct rxrpc_call_params call;
728 u32 abort_code; /* Abort code to Tx (if abort) */
729 enum rxrpc_command command : 8; /* The command to implement */
730 bool exclusive; /* Shared or exclusive call */
731 bool upgrade; /* If the connection is upgradeable */
732 };
733
734 #include <trace/events/rxrpc.h>
735
736 /*
737 * af_rxrpc.c
738 */
739 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
740 extern struct workqueue_struct *rxrpc_workqueue;
741
742 /*
743 * call_accept.c
744 */
745 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
746 void rxrpc_discard_prealloc(struct rxrpc_sock *);
747 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
748 struct rxrpc_sock *,
749 struct sk_buff *);
750 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
751 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
752 rxrpc_notify_rx_t);
753 int rxrpc_reject_call(struct rxrpc_sock *);
754
755 /*
756 * call_event.c
757 */
758 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool, bool,
759 enum rxrpc_propose_ack_trace);
760 void rxrpc_process_call(struct work_struct *);
761
762 static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
763 unsigned long expire_at,
764 unsigned long now,
765 enum rxrpc_timer_trace why)
766 {
767 trace_rxrpc_timer(call, why, now);
768 timer_reduce(&call->timer, expire_at);
769 }
770
771 /*
772 * call_object.c
773 */
774 extern const char *const rxrpc_call_states[];
775 extern const char *const rxrpc_call_completions[];
776 extern unsigned int rxrpc_max_call_lifetime;
777 extern struct kmem_cache *rxrpc_call_jar;
778
779 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
780 struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
781 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
782 struct rxrpc_conn_parameters *,
783 struct sockaddr_rxrpc *,
784 struct rxrpc_call_params *, gfp_t,
785 unsigned int);
786 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
787 struct sk_buff *);
788 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
789 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
790 bool __rxrpc_queue_call(struct rxrpc_call *);
791 bool rxrpc_queue_call(struct rxrpc_call *);
792 void rxrpc_see_call(struct rxrpc_call *);
793 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
794 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
795 void rxrpc_cleanup_call(struct rxrpc_call *);
796 void rxrpc_destroy_all_calls(struct rxrpc_net *);
797
798 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
799 {
800 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
801 }
802
803 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
804 {
805 return !rxrpc_is_service_call(call);
806 }
807
808 /*
809 * Transition a call to the complete state.
810 */
811 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
812 enum rxrpc_call_completion compl,
813 u32 abort_code,
814 int error)
815 {
816 if (call->state < RXRPC_CALL_COMPLETE) {
817 call->abort_code = abort_code;
818 call->error = error;
819 call->completion = compl,
820 call->state = RXRPC_CALL_COMPLETE;
821 trace_rxrpc_call_complete(call);
822 wake_up(&call->waitq);
823 return true;
824 }
825 return false;
826 }
827
828 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
829 enum rxrpc_call_completion compl,
830 u32 abort_code,
831 int error)
832 {
833 bool ret;
834
835 write_lock_bh(&call->state_lock);
836 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
837 write_unlock_bh(&call->state_lock);
838 return ret;
839 }
840
841 /*
842 * Record that a call successfully completed.
843 */
844 static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
845 {
846 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
847 }
848
849 static inline bool rxrpc_call_completed(struct rxrpc_call *call)
850 {
851 bool ret;
852
853 write_lock_bh(&call->state_lock);
854 ret = __rxrpc_call_completed(call);
855 write_unlock_bh(&call->state_lock);
856 return ret;
857 }
858
859 /*
860 * Record that a call is locally aborted.
861 */
862 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
863 rxrpc_seq_t seq,
864 u32 abort_code, int error)
865 {
866 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq,
867 abort_code, error);
868 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
869 abort_code, error);
870 }
871
872 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
873 rxrpc_seq_t seq, u32 abort_code, int error)
874 {
875 bool ret;
876
877 write_lock_bh(&call->state_lock);
878 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
879 write_unlock_bh(&call->state_lock);
880 return ret;
881 }
882
883 /*
884 * Abort a call due to a protocol error.
885 */
886 static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
887 struct sk_buff *skb,
888 const char *eproto_why,
889 const char *why,
890 u32 abort_code)
891 {
892 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
893
894 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
895 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
896 }
897
898 #define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
899 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
900 (abort_why), (abort_code))
901
902 /*
903 * conn_client.c
904 */
905 extern unsigned int rxrpc_max_client_connections;
906 extern unsigned int rxrpc_reap_client_connections;
907 extern unsigned long rxrpc_conn_idle_client_expiry;
908 extern unsigned long rxrpc_conn_idle_client_fast_expiry;
909 extern struct idr rxrpc_client_conn_ids;
910
911 void rxrpc_destroy_client_conn_ids(void);
912 int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
913 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
914 gfp_t);
915 void rxrpc_expose_client_call(struct rxrpc_call *);
916 void rxrpc_disconnect_client_call(struct rxrpc_call *);
917 void rxrpc_put_client_conn(struct rxrpc_connection *);
918 void rxrpc_discard_expired_client_conns(struct work_struct *);
919 void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
920 void rxrpc_clean_up_local_conns(struct rxrpc_local *);
921
922 /*
923 * conn_event.c
924 */
925 void rxrpc_process_connection(struct work_struct *);
926
927 /*
928 * conn_object.c
929 */
930 extern unsigned int rxrpc_connection_expiry;
931 extern unsigned int rxrpc_closed_conn_expiry;
932
933 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
934 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
935 struct sk_buff *,
936 struct rxrpc_peer **);
937 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
938 void rxrpc_disconnect_call(struct rxrpc_call *);
939 void rxrpc_kill_connection(struct rxrpc_connection *);
940 bool rxrpc_queue_conn(struct rxrpc_connection *);
941 void rxrpc_see_connection(struct rxrpc_connection *);
942 void rxrpc_get_connection(struct rxrpc_connection *);
943 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
944 void rxrpc_put_service_conn(struct rxrpc_connection *);
945 void rxrpc_service_connection_reaper(struct work_struct *);
946 void rxrpc_destroy_all_connections(struct rxrpc_net *);
947
948 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
949 {
950 return conn->out_clientflag;
951 }
952
953 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
954 {
955 return !rxrpc_conn_is_client(conn);
956 }
957
958 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
959 {
960 if (!conn)
961 return;
962
963 if (rxrpc_conn_is_client(conn))
964 rxrpc_put_client_conn(conn);
965 else
966 rxrpc_put_service_conn(conn);
967 }
968
969 static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
970 unsigned long expire_at)
971 {
972 timer_reduce(&conn->timer, expire_at);
973 }
974
975 /*
976 * conn_service.c
977 */
978 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
979 struct sk_buff *);
980 struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
981 void rxrpc_new_incoming_connection(struct rxrpc_sock *, struct rxrpc_connection *,
982 const struct rxrpc_security *, struct key *,
983 struct sk_buff *);
984 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
985
986 /*
987 * input.c
988 */
989 int rxrpc_input_packet(struct sock *, struct sk_buff *);
990
991 /*
992 * insecure.c
993 */
994 extern const struct rxrpc_security rxrpc_no_security;
995
996 /*
997 * key.c
998 */
999 extern struct key_type key_type_rxrpc;
1000 extern struct key_type key_type_rxrpc_s;
1001
1002 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
1003 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
1004 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
1005 u32);
1006
1007 /*
1008 * local_event.c
1009 */
1010 extern void rxrpc_process_local_events(struct rxrpc_local *);
1011
1012 /*
1013 * local_object.c
1014 */
1015 struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
1016 struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
1017 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
1018 void rxrpc_put_local(struct rxrpc_local *);
1019 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *);
1020 void rxrpc_unuse_local(struct rxrpc_local *);
1021 void rxrpc_queue_local(struct rxrpc_local *);
1022 void rxrpc_destroy_all_locals(struct rxrpc_net *);
1023
1024 /*
1025 * misc.c
1026 */
1027 extern unsigned int rxrpc_max_backlog __read_mostly;
1028 extern unsigned long rxrpc_requested_ack_delay;
1029 extern unsigned long rxrpc_soft_ack_delay;
1030 extern unsigned long rxrpc_idle_ack_delay;
1031 extern unsigned int rxrpc_rx_window_size;
1032 extern unsigned int rxrpc_rx_mtu;
1033 extern unsigned int rxrpc_rx_jumbo_max;
1034 extern unsigned long rxrpc_resend_timeout;
1035
1036 extern const s8 rxrpc_ack_priority[];
1037
1038 /*
1039 * net_ns.c
1040 */
1041 extern unsigned int rxrpc_net_id;
1042 extern struct pernet_operations rxrpc_net_ops;
1043
1044 static inline struct rxrpc_net *rxrpc_net(struct net *net)
1045 {
1046 return net_generic(net, rxrpc_net_id);
1047 }
1048
1049 /*
1050 * output.c
1051 */
1052 int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
1053 int rxrpc_send_abort_packet(struct rxrpc_call *);
1054 int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
1055 void rxrpc_reject_packets(struct rxrpc_local *);
1056 void rxrpc_send_keepalive(struct rxrpc_peer *);
1057
1058 /*
1059 * peer_event.c
1060 */
1061 void rxrpc_error_report(struct sock *);
1062 void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1063 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1064 void rxrpc_peer_keepalive_worker(struct work_struct *);
1065
1066 /*
1067 * peer_object.c
1068 */
1069 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1070 const struct sockaddr_rxrpc *);
1071 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
1072 struct sockaddr_rxrpc *, gfp_t);
1073 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1074 void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
1075 struct rxrpc_peer *);
1076 void rxrpc_destroy_all_peers(struct rxrpc_net *);
1077 struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
1078 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
1079 void rxrpc_put_peer(struct rxrpc_peer *);
1080 void rxrpc_put_peer_locked(struct rxrpc_peer *);
1081
1082 /*
1083 * proc.c
1084 */
1085 extern const struct seq_operations rxrpc_call_seq_ops;
1086 extern const struct seq_operations rxrpc_connection_seq_ops;
1087 extern const struct seq_operations rxrpc_peer_seq_ops;
1088
1089 /*
1090 * recvmsg.c
1091 */
1092 void rxrpc_notify_socket(struct rxrpc_call *);
1093 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1094
1095 /*
1096 * rxkad.c
1097 */
1098 #ifdef CONFIG_RXKAD
1099 extern const struct rxrpc_security rxkad;
1100 #endif
1101
1102 /*
1103 * security.c
1104 */
1105 int __init rxrpc_init_security(void);
1106 void rxrpc_exit_security(void);
1107 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1108 bool rxrpc_look_up_server_security(struct rxrpc_local *, struct rxrpc_sock *,
1109 const struct rxrpc_security **, struct key **,
1110 struct sk_buff *);
1111
1112 /*
1113 * sendmsg.c
1114 */
1115 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1116
1117 /*
1118 * skbuff.c
1119 */
1120 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1121 void rxrpc_packet_destructor(struct sk_buff *);
1122 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1123 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1124 void rxrpc_eaten_skb(struct sk_buff *, enum rxrpc_skb_trace);
1125 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1126 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1127 void rxrpc_purge_queue(struct sk_buff_head *);
1128
1129 /*
1130 * sysctl.c
1131 */
1132 #ifdef CONFIG_SYSCTL
1133 extern int __init rxrpc_sysctl_init(void);
1134 extern void rxrpc_sysctl_exit(void);
1135 #else
1136 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1137 static inline void rxrpc_sysctl_exit(void) {}
1138 #endif
1139
1140 /*
1141 * utils.c
1142 */
1143 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1144
1145 static inline bool before(u32 seq1, u32 seq2)
1146 {
1147 return (s32)(seq1 - seq2) < 0;
1148 }
1149 static inline bool before_eq(u32 seq1, u32 seq2)
1150 {
1151 return (s32)(seq1 - seq2) <= 0;
1152 }
1153 static inline bool after(u32 seq1, u32 seq2)
1154 {
1155 return (s32)(seq1 - seq2) > 0;
1156 }
1157 static inline bool after_eq(u32 seq1, u32 seq2)
1158 {
1159 return (s32)(seq1 - seq2) >= 0;
1160 }
1161
1162 /*
1163 * debug tracing
1164 */
1165 extern unsigned int rxrpc_debug;
1166
1167 #define dbgprintk(FMT,...) \
1168 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1169
1170 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1171 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1172 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1173 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1174 #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1175
1176
1177 #if defined(__KDEBUG)
1178 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1179 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1180 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1181 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1182 #define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1183
1184 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1185 #define RXRPC_DEBUG_KENTER 0x01
1186 #define RXRPC_DEBUG_KLEAVE 0x02
1187 #define RXRPC_DEBUG_KDEBUG 0x04
1188 #define RXRPC_DEBUG_KPROTO 0x08
1189 #define RXRPC_DEBUG_KNET 0x10
1190
1191 #define _enter(FMT,...) \
1192 do { \
1193 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1194 kenter(FMT,##__VA_ARGS__); \
1195 } while (0)
1196
1197 #define _leave(FMT,...) \
1198 do { \
1199 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1200 kleave(FMT,##__VA_ARGS__); \
1201 } while (0)
1202
1203 #define _debug(FMT,...) \
1204 do { \
1205 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1206 kdebug(FMT,##__VA_ARGS__); \
1207 } while (0)
1208
1209 #define _proto(FMT,...) \
1210 do { \
1211 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1212 kproto(FMT,##__VA_ARGS__); \
1213 } while (0)
1214
1215 #define _net(FMT,...) \
1216 do { \
1217 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1218 knet(FMT,##__VA_ARGS__); \
1219 } while (0)
1220
1221 #else
1222 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1223 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1224 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1225 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1226 #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1227 #endif
1228
1229 /*
1230 * debug assertion checking
1231 */
1232 #if 1 // defined(__KDEBUGALL)
1233
1234 #define ASSERT(X) \
1235 do { \
1236 if (unlikely(!(X))) { \
1237 pr_err("Assertion failed\n"); \
1238 BUG(); \
1239 } \
1240 } while (0)
1241
1242 #define ASSERTCMP(X, OP, Y) \
1243 do { \
1244 __typeof__(X) _x = (X); \
1245 __typeof__(Y) _y = (__typeof__(X))(Y); \
1246 if (unlikely(!(_x OP _y))) { \
1247 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1248 (unsigned long)_x, (unsigned long)_x, #OP, \
1249 (unsigned long)_y, (unsigned long)_y); \
1250 BUG(); \
1251 } \
1252 } while (0)
1253
1254 #define ASSERTIF(C, X) \
1255 do { \
1256 if (unlikely((C) && !(X))) { \
1257 pr_err("Assertion failed\n"); \
1258 BUG(); \
1259 } \
1260 } while (0)
1261
1262 #define ASSERTIFCMP(C, X, OP, Y) \
1263 do { \
1264 __typeof__(X) _x = (X); \
1265 __typeof__(Y) _y = (__typeof__(X))(Y); \
1266 if (unlikely((C) && !(_x OP _y))) { \
1267 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1268 (unsigned long)_x, (unsigned long)_x, #OP, \
1269 (unsigned long)_y, (unsigned long)_y); \
1270 BUG(); \
1271 } \
1272 } while (0)
1273
1274 #else
1275
1276 #define ASSERT(X) \
1277 do { \
1278 } while (0)
1279
1280 #define ASSERTCMP(X, OP, Y) \
1281 do { \
1282 } while (0)
1283
1284 #define ASSERTIF(C, X) \
1285 do { \
1286 } while (0)
1287
1288 #define ASSERTIFCMP(C, X, OP, Y) \
1289 do { \
1290 } while (0)
1291
1292 #endif /* __KDEBUGALL */
Linux with added FPC-III support