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12#include <linux/atomic.h>
13#include <linux/seqlock.h>
14#include <net/net_namespace.h>
15#include <net/netns/generic.h>
16#include <net/sock.h>
17#include <net/af_rxrpc.h>
18#include "protocol.h"
19
20#if 0
21#define CHECK_SLAB_OKAY(X) \
22 BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
23 (POISON_FREE << 8 | POISON_FREE))
24#else
25#define CHECK_SLAB_OKAY(X) do {} while (0)
26#endif
27
28#define FCRYPT_BSIZE 8
29struct 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
40struct rxrpc_connection;
41
42
43
44
45enum rxrpc_skb_mark {
46 RXRPC_SKB_MARK_DATA,
47 RXRPC_SKB_MARK_FINAL_ACK,
48 RXRPC_SKB_MARK_BUSY,
49 RXRPC_SKB_MARK_REMOTE_ABORT,
50 RXRPC_SKB_MARK_LOCAL_ABORT,
51 RXRPC_SKB_MARK_NET_ERROR,
52 RXRPC_SKB_MARK_LOCAL_ERROR,
53 RXRPC_SKB_MARK_NEW_CALL,
54};
55
56
57
58
59enum {
60 RXRPC_UNBOUND = 0,
61 RXRPC_CLIENT_UNBOUND,
62 RXRPC_CLIENT_BOUND,
63 RXRPC_SERVER_BOUND,
64 RXRPC_SERVER_BOUND2,
65 RXRPC_SERVER_LISTENING,
66 RXRPC_SERVER_LISTEN_DISABLED,
67 RXRPC_CLOSE,
68};
69
70
71
72
73struct rxrpc_net {
74 struct proc_dir_entry *proc_net;
75 u32 epoch;
76 struct list_head calls;
77 rwlock_t call_lock;
78 atomic_t nr_calls;
79
80 atomic_t nr_conns;
81 struct list_head conn_proc_list;
82 struct list_head service_conns;
83 rwlock_t conn_lock;
84 struct work_struct service_conn_reaper;
85 struct timer_list service_conn_reap_timer;
86
87 unsigned int nr_client_conns;
88 unsigned int nr_active_client_conns;
89 bool kill_all_client_conns;
90 bool live;
91 spinlock_t client_conn_cache_lock;
92 spinlock_t client_conn_discard_lock;
93 struct list_head waiting_client_conns;
94 struct list_head active_client_conns;
95 struct list_head idle_client_conns;
96 struct work_struct client_conn_reaper;
97 struct timer_list client_conn_reap_timer;
98
99 struct list_head local_endpoints;
100 struct mutex local_mutex;
101
102 DECLARE_HASHTABLE (peer_hash, 10);
103 spinlock_t peer_hash_lock;
104
105#define RXRPC_KEEPALIVE_TIME 20
106 u8 peer_keepalive_cursor;
107 ktime_t peer_keepalive_base;
108 struct hlist_head peer_keepalive[RXRPC_KEEPALIVE_TIME + 1];
109 struct hlist_head peer_keepalive_new;
110 struct timer_list peer_keepalive_timer;
111 struct work_struct peer_keepalive_work;
112};
113
114
115
116
117
118
119
120
121
122struct rxrpc_backlog {
123 unsigned short peer_backlog_head;
124 unsigned short peer_backlog_tail;
125 unsigned short conn_backlog_head;
126 unsigned short conn_backlog_tail;
127 unsigned short call_backlog_head;
128 unsigned short call_backlog_tail;
129#define RXRPC_BACKLOG_MAX 32
130 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
131 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
132 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
133};
134
135
136
137
138struct rxrpc_sock {
139
140 struct sock sk;
141 rxrpc_notify_new_call_t notify_new_call;
142 rxrpc_discard_new_call_t discard_new_call;
143 struct rxrpc_local *local;
144 struct rxrpc_backlog *backlog;
145 spinlock_t incoming_lock;
146 struct list_head sock_calls;
147 struct list_head to_be_accepted;
148 struct list_head recvmsg_q;
149 rwlock_t recvmsg_lock;
150 struct key *key;
151 struct key *securities;
152 struct rb_root calls;
153 unsigned long flags;
154#define RXRPC_SOCK_CONNECTED 0
155 rwlock_t call_lock;
156 u32 min_sec_level;
157#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
158 bool exclusive;
159 u16 second_service;
160 struct {
161
162 u16 from;
163 u16 to;
164 } service_upgrade;
165 sa_family_t family;
166 struct sockaddr_rxrpc srx;
167 struct sockaddr_rxrpc connect_srx;
168};
169
170#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
171
172
173
174
175struct rxrpc_host_header {
176 u32 epoch;
177 u32 cid;
178 u32 callNumber;
179 u32 seq;
180 u32 serial;
181 u8 type;
182 u8 flags;
183 u8 userStatus;
184 u8 securityIndex;
185 union {
186 u16 _rsvd;
187 u16 cksum;
188 };
189 u16 serviceId;
190} __packed;
191
192
193
194
195
196struct rxrpc_skb_priv {
197 union {
198 u8 nr_jumbo;
199 };
200 union {
201 int remain;
202 };
203
204 struct rxrpc_host_header hdr;
205};
206
207#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
208
209
210
211
212struct rxrpc_security {
213 const char *name;
214 u8 security_index;
215
216
217 int (*init)(void);
218
219
220 void (*exit)(void);
221
222
223 int (*init_connection_security)(struct rxrpc_connection *);
224
225
226 int (*prime_packet_security)(struct rxrpc_connection *);
227
228
229 int (*secure_packet)(struct rxrpc_call *,
230 struct sk_buff *,
231 size_t,
232 void *);
233
234
235 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
236 unsigned int, unsigned int, rxrpc_seq_t, u16);
237
238
239 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
240 unsigned int *, unsigned int *);
241
242
243 int (*issue_challenge)(struct rxrpc_connection *);
244
245
246 int (*respond_to_challenge)(struct rxrpc_connection *,
247 struct sk_buff *,
248 u32 *);
249
250
251 int (*verify_response)(struct rxrpc_connection *,
252 struct sk_buff *,
253 u32 *);
254
255
256 void (*clear)(struct rxrpc_connection *);
257};
258
259
260
261
262
263
264struct rxrpc_local {
265 struct rcu_head rcu;
266 atomic_t usage;
267 struct rxrpc_net *rxnet;
268 struct list_head link;
269 struct socket *socket;
270 struct work_struct processor;
271 struct rxrpc_sock __rcu *service;
272 struct rw_semaphore defrag_sem;
273 struct sk_buff_head reject_queue;
274 struct sk_buff_head event_queue;
275 struct rb_root client_conns;
276 spinlock_t client_conns_lock;
277 spinlock_t lock;
278 rwlock_t services_lock;
279 int debug_id;
280 bool dead;
281 bool service_closed;
282 struct sockaddr_rxrpc srx;
283};
284
285
286
287
288
289struct rxrpc_peer {
290 struct rcu_head rcu;
291 atomic_t usage;
292 unsigned long hash_key;
293 struct hlist_node hash_link;
294 struct rxrpc_local *local;
295 struct hlist_head error_targets;
296 struct work_struct error_distributor;
297 struct rb_root service_conns;
298 struct hlist_node keepalive_link;
299 time64_t last_tx_at;
300 seqlock_t service_conn_lock;
301 spinlock_t lock;
302 unsigned int if_mtu;
303 unsigned int mtu;
304 unsigned int maxdata;
305 unsigned short hdrsize;
306 int debug_id;
307 int error_report;
308#define RXRPC_LOCAL_ERROR_OFFSET 1000000
309 struct sockaddr_rxrpc srx;
310
311
312#define RXRPC_RTT_CACHE_SIZE 32
313 ktime_t rtt_last_req;
314 u64 rtt;
315 u64 rtt_sum;
316 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE];
317 u8 rtt_cursor;
318 u8 rtt_usage;
319
320 u8 cong_cwnd;
321};
322
323
324
325
326struct rxrpc_conn_proto {
327 union {
328 struct {
329 u32 epoch;
330 u32 cid;
331 };
332 u64 index_key;
333 };
334};
335
336struct rxrpc_conn_parameters {
337 struct rxrpc_local *local;
338 struct rxrpc_peer *peer;
339 struct key *key;
340 bool exclusive;
341 bool upgrade;
342 u16 service_id;
343 u32 security_level;
344};
345
346
347
348
349enum rxrpc_conn_flag {
350 RXRPC_CONN_HAS_IDR,
351 RXRPC_CONN_IN_SERVICE_CONNS,
352 RXRPC_CONN_IN_CLIENT_CONNS,
353 RXRPC_CONN_EXPOSED,
354 RXRPC_CONN_DONT_REUSE,
355 RXRPC_CONN_COUNTED,
356 RXRPC_CONN_PROBING_FOR_UPGRADE,
357 RXRPC_CONN_FINAL_ACK_0,
358 RXRPC_CONN_FINAL_ACK_1,
359 RXRPC_CONN_FINAL_ACK_2,
360 RXRPC_CONN_FINAL_ACK_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
370
371enum rxrpc_conn_event {
372 RXRPC_CONN_EV_CHALLENGE,
373};
374
375
376
377
378enum rxrpc_conn_cache_state {
379 RXRPC_CONN_CLIENT_INACTIVE,
380 RXRPC_CONN_CLIENT_WAITING,
381 RXRPC_CONN_CLIENT_ACTIVE,
382 RXRPC_CONN_CLIENT_UPGRADE,
383 RXRPC_CONN_CLIENT_CULLED,
384 RXRPC_CONN_CLIENT_IDLE,
385 RXRPC_CONN__NR_CACHE_STATES
386};
387
388
389
390
391enum rxrpc_conn_proto_state {
392 RXRPC_CONN_UNUSED,
393 RXRPC_CONN_CLIENT,
394 RXRPC_CONN_SERVICE_PREALLOC,
395 RXRPC_CONN_SERVICE_UNSECURED,
396 RXRPC_CONN_SERVICE_CHALLENGING,
397 RXRPC_CONN_SERVICE,
398 RXRPC_CONN_REMOTELY_ABORTED,
399 RXRPC_CONN_LOCALLY_ABORTED,
400 RXRPC_CONN__NR_STATES
401};
402
403
404
405
406
407
408struct 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;
418#define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
419 struct list_head waiting_calls;
420 struct rxrpc_channel {
421 unsigned long final_ack_at;
422 struct rxrpc_call __rcu *call;
423 u32 call_id;
424 u32 call_counter;
425 u32 last_call;
426 u8 last_type;
427 union {
428 u32 last_seq;
429 u32 last_abort;
430 };
431 } channels[RXRPC_MAXCALLS];
432
433 struct timer_list timer;
434 struct work_struct processor;
435 union {
436 struct rb_node client_node;
437 struct rb_node service_node;
438 };
439 struct list_head proc_link;
440 struct list_head link;
441 struct sk_buff_head rx_queue;
442 const struct rxrpc_security *security;
443 struct key *server_key;
444 struct crypto_skcipher *cipher;
445 struct rxrpc_crypt csum_iv;
446 unsigned long flags;
447 unsigned long events;
448 unsigned long idle_timestamp;
449 spinlock_t state_lock;
450 enum rxrpc_conn_cache_state cache_state;
451 enum rxrpc_conn_proto_state state;
452 u32 local_abort;
453 u32 remote_abort;
454 int debug_id;
455 atomic_t serial;
456 unsigned int hi_serial;
457 u32 security_nonce;
458 u16 service_id;
459 u8 size_align;
460 u8 security_size;
461 u8 security_ix;
462 u8 out_clientflag;
463};
464
465
466
467
468enum rxrpc_call_flag {
469 RXRPC_CALL_RELEASED,
470 RXRPC_CALL_HAS_USERID,
471 RXRPC_CALL_IS_SERVICE,
472 RXRPC_CALL_EXPOSED,
473 RXRPC_CALL_RX_LAST,
474 RXRPC_CALL_TX_LAST,
475 RXRPC_CALL_TX_LASTQ,
476 RXRPC_CALL_SEND_PING,
477 RXRPC_CALL_PINGING,
478 RXRPC_CALL_RETRANS_TIMEOUT,
479 RXRPC_CALL_BEGAN_RX_TIMER,
480};
481
482
483
484
485enum rxrpc_call_event {
486 RXRPC_CALL_EV_ACK,
487 RXRPC_CALL_EV_ABORT,
488 RXRPC_CALL_EV_RESEND,
489 RXRPC_CALL_EV_PING,
490 RXRPC_CALL_EV_EXPIRED,
491 RXRPC_CALL_EV_ACK_LOST,
492};
493
494
495
496
497enum rxrpc_call_state {
498 RXRPC_CALL_UNINITIALISED,
499 RXRPC_CALL_CLIENT_AWAIT_CONN,
500 RXRPC_CALL_CLIENT_SEND_REQUEST,
501 RXRPC_CALL_CLIENT_AWAIT_REPLY,
502 RXRPC_CALL_CLIENT_RECV_REPLY,
503 RXRPC_CALL_SERVER_PREALLOC,
504 RXRPC_CALL_SERVER_SECURING,
505 RXRPC_CALL_SERVER_ACCEPTING,
506 RXRPC_CALL_SERVER_RECV_REQUEST,
507 RXRPC_CALL_SERVER_ACK_REQUEST,
508 RXRPC_CALL_SERVER_SEND_REPLY,
509 RXRPC_CALL_SERVER_AWAIT_ACK,
510 RXRPC_CALL_COMPLETE,
511 NR__RXRPC_CALL_STATES
512};
513
514
515
516
517enum rxrpc_congest_mode {
518 RXRPC_CALL_SLOW_START,
519 RXRPC_CALL_CONGEST_AVOIDANCE,
520 RXRPC_CALL_PACKET_LOSS,
521 RXRPC_CALL_FAST_RETRANSMIT,
522 NR__RXRPC_CONGEST_MODES
523};
524
525
526
527
528
529struct rxrpc_call {
530 struct rcu_head rcu;
531 struct rxrpc_connection *conn;
532 struct rxrpc_peer *peer;
533 struct rxrpc_sock __rcu *socket;
534 struct rxrpc_net *rxnet;
535 struct mutex user_mutex;
536 unsigned long ack_at;
537 unsigned long ack_lost_at;
538 unsigned long resend_at;
539 unsigned long ping_at;
540 unsigned long keepalive_at;
541 unsigned long expect_rx_by;
542 unsigned long expect_req_by;
543 unsigned long expect_term_by;
544 u32 next_rx_timo;
545 u32 next_req_timo;
546 struct timer_list timer;
547 struct work_struct processor;
548 rxrpc_notify_rx_t notify_rx;
549 struct list_head link;
550 struct list_head chan_wait_link;
551 struct hlist_node error_link;
552 struct list_head accept_link;
553 struct list_head recvmsg_link;
554 struct list_head sock_link;
555 struct rb_node sock_node;
556 struct sk_buff *tx_pending;
557 wait_queue_head_t waitq;
558 s64 tx_total_len;
559 __be32 crypto_buf[2];
560 unsigned long user_call_ID;
561 unsigned long flags;
562 unsigned long events;
563 spinlock_t lock;
564 spinlock_t notify_lock;
565 rwlock_t state_lock;
566 u32 abort_code;
567 int error;
568 enum rxrpc_call_state state;
569 enum rxrpc_call_completion completion;
570 atomic_t usage;
571 u16 service_id;
572 u8 security_ix;
573 u32 call_id;
574 u32 cid;
575 int debug_id;
576 unsigned short rx_pkt_offset;
577 unsigned short rx_pkt_len;
578
579
580
581
582
583
584
585
586
587
588#define RXRPC_RXTX_BUFF_SIZE 64
589#define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
590#define RXRPC_INIT_RX_WINDOW_SIZE 32
591 struct sk_buff **rxtx_buffer;
592 u8 *rxtx_annotations;
593#define RXRPC_TX_ANNO_ACK 0
594#define RXRPC_TX_ANNO_UNACK 1
595#define RXRPC_TX_ANNO_NAK 2
596#define RXRPC_TX_ANNO_RETRANS 3
597#define RXRPC_TX_ANNO_MASK 0x03
598#define RXRPC_TX_ANNO_LAST 0x04
599#define RXRPC_TX_ANNO_RESENT 0x08
600
601#define RXRPC_RX_ANNO_JUMBO 0x3f
602#define RXRPC_RX_ANNO_JLAST 0x40
603#define RXRPC_RX_ANNO_VERIFIED 0x80
604 rxrpc_seq_t tx_hard_ack;
605
606
607 rxrpc_seq_t tx_top;
608
609
610
611
612
613#define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
614 u8 cong_cwnd;
615 u8 cong_extra;
616 u8 cong_ssthresh;
617 enum rxrpc_congest_mode cong_mode:8;
618 u8 cong_dup_acks;
619 u8 cong_cumul_acks;
620 ktime_t cong_tstamp;
621
622 rxrpc_seq_t rx_hard_ack;
623
624
625 rxrpc_seq_t rx_top;
626 rxrpc_seq_t rx_expect_next;
627 u8 rx_winsize;
628 u8 tx_winsize;
629 bool tx_phase;
630 u8 nr_jumbo_bad;
631
632
633 u8 ackr_reason;
634 u16 ackr_skew;
635 rxrpc_serial_t ackr_serial;
636 rxrpc_seq_t ackr_prev_seq;
637 rxrpc_seq_t ackr_consumed;
638 rxrpc_seq_t ackr_seen;
639
640
641 rxrpc_serial_t ping_serial;
642 ktime_t ping_time;
643
644
645 ktime_t acks_latest_ts;
646 rxrpc_serial_t acks_latest;
647 rxrpc_seq_t acks_lowest_nak;
648 rxrpc_seq_t acks_lost_top;
649 rxrpc_serial_t acks_lost_ping;
650};
651
652
653
654
655struct rxrpc_ack_summary {
656 u8 ack_reason;
657 u8 nr_acks;
658 u8 nr_nacks;
659 u8 nr_new_acks;
660 u8 nr_new_nacks;
661 u8 nr_rot_new_acks;
662 bool new_low_nack;
663 bool retrans_timeo;
664 u8 flight_size;
665
666 enum rxrpc_congest_mode mode:8;
667 u8 cwnd;
668 u8 ssthresh;
669 u8 dup_acks;
670 u8 cumulative_acks;
671};
672
673
674
675
676enum rxrpc_command {
677 RXRPC_CMD_SEND_DATA,
678 RXRPC_CMD_SEND_ABORT,
679 RXRPC_CMD_ACCEPT,
680 RXRPC_CMD_REJECT_BUSY,
681};
682
683struct rxrpc_call_params {
684 s64 tx_total_len;
685 unsigned long user_call_ID;
686 struct {
687 u32 hard;
688 u32 idle;
689 u32 normal;
690 } timeouts;
691 u8 nr_timeouts;
692};
693
694struct rxrpc_send_params {
695 struct rxrpc_call_params call;
696 u32 abort_code;
697 enum rxrpc_command command : 8;
698 bool exclusive;
699 bool upgrade;
700};
701
702#include <trace/events/rxrpc.h>
703
704
705
706
707extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
708extern struct workqueue_struct *rxrpc_workqueue;
709
710
711
712
713int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
714void rxrpc_discard_prealloc(struct rxrpc_sock *);
715struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
716 struct rxrpc_connection *,
717 struct sk_buff *);
718void rxrpc_accept_incoming_calls(struct rxrpc_local *);
719struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
720 rxrpc_notify_rx_t);
721int rxrpc_reject_call(struct rxrpc_sock *);
722
723
724
725
726void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
727 enum rxrpc_propose_ack_trace);
728void rxrpc_process_call(struct work_struct *);
729
730static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
731 unsigned long expire_at,
732 unsigned long now,
733 enum rxrpc_timer_trace why)
734{
735 trace_rxrpc_timer(call, why, now);
736 timer_reduce(&call->timer, expire_at);
737}
738
739
740
741
742extern const char *const rxrpc_call_states[];
743extern const char *const rxrpc_call_completions[];
744extern unsigned int rxrpc_max_call_lifetime;
745extern struct kmem_cache *rxrpc_call_jar;
746
747struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
748struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
749struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
750 struct rxrpc_conn_parameters *,
751 struct sockaddr_rxrpc *,
752 struct rxrpc_call_params *, gfp_t,
753 unsigned int);
754int rxrpc_retry_client_call(struct rxrpc_sock *,
755 struct rxrpc_call *,
756 struct rxrpc_conn_parameters *,
757 struct sockaddr_rxrpc *,
758 gfp_t);
759void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
760 struct sk_buff *);
761void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
762int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *);
763void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
764bool __rxrpc_queue_call(struct rxrpc_call *);
765bool rxrpc_queue_call(struct rxrpc_call *);
766void rxrpc_see_call(struct rxrpc_call *);
767void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
768void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
769void rxrpc_cleanup_call(struct rxrpc_call *);
770void rxrpc_destroy_all_calls(struct rxrpc_net *);
771
772static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
773{
774 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
775}
776
777static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
778{
779 return !rxrpc_is_service_call(call);
780}
781
782
783
784
785static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
786 enum rxrpc_call_completion compl,
787 u32 abort_code,
788 int error)
789{
790 if (call->state < RXRPC_CALL_COMPLETE) {
791 call->abort_code = abort_code;
792 call->error = error;
793 call->completion = compl,
794 call->state = RXRPC_CALL_COMPLETE;
795 trace_rxrpc_call_complete(call);
796 wake_up(&call->waitq);
797 return true;
798 }
799 return false;
800}
801
802static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
803 enum rxrpc_call_completion compl,
804 u32 abort_code,
805 int error)
806{
807 bool ret;
808
809 write_lock_bh(&call->state_lock);
810 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
811 write_unlock_bh(&call->state_lock);
812 return ret;
813}
814
815
816
817
818static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
819{
820 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
821}
822
823static inline bool rxrpc_call_completed(struct rxrpc_call *call)
824{
825 bool ret;
826
827 write_lock_bh(&call->state_lock);
828 ret = __rxrpc_call_completed(call);
829 write_unlock_bh(&call->state_lock);
830 return ret;
831}
832
833
834
835
836static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
837 rxrpc_seq_t seq,
838 u32 abort_code, int error)
839{
840 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq,
841 abort_code, error);
842 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
843 abort_code, error);
844}
845
846static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
847 rxrpc_seq_t seq, u32 abort_code, int error)
848{
849 bool ret;
850
851 write_lock_bh(&call->state_lock);
852 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
853 write_unlock_bh(&call->state_lock);
854 return ret;
855}
856
857
858
859
860static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
861 struct sk_buff *skb,
862 const char *eproto_why,
863 const char *why,
864 u32 abort_code)
865{
866 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
867
868 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
869 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
870}
871
872#define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
873 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
874 (abort_why), (abort_code))
875
876
877
878
879extern unsigned int rxrpc_max_client_connections;
880extern unsigned int rxrpc_reap_client_connections;
881extern unsigned long rxrpc_conn_idle_client_expiry;
882extern unsigned long rxrpc_conn_idle_client_fast_expiry;
883extern struct idr rxrpc_client_conn_ids;
884
885void rxrpc_destroy_client_conn_ids(void);
886int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
887 struct sockaddr_rxrpc *, gfp_t);
888void rxrpc_expose_client_call(struct rxrpc_call *);
889void rxrpc_disconnect_client_call(struct rxrpc_call *);
890void rxrpc_put_client_conn(struct rxrpc_connection *);
891void rxrpc_discard_expired_client_conns(struct work_struct *);
892void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
893
894
895
896
897void rxrpc_process_connection(struct work_struct *);
898
899
900
901
902extern unsigned int rxrpc_connection_expiry;
903extern unsigned int rxrpc_closed_conn_expiry;
904
905struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
906struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
907 struct sk_buff *);
908void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
909void rxrpc_disconnect_call(struct rxrpc_call *);
910void rxrpc_kill_connection(struct rxrpc_connection *);
911bool rxrpc_queue_conn(struct rxrpc_connection *);
912void rxrpc_see_connection(struct rxrpc_connection *);
913void rxrpc_get_connection(struct rxrpc_connection *);
914struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
915void rxrpc_put_service_conn(struct rxrpc_connection *);
916void rxrpc_service_connection_reaper(struct work_struct *);
917void rxrpc_destroy_all_connections(struct rxrpc_net *);
918
919static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
920{
921 return conn->out_clientflag;
922}
923
924static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
925{
926 return !rxrpc_conn_is_client(conn);
927}
928
929static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
930{
931 if (!conn)
932 return;
933
934 if (rxrpc_conn_is_client(conn))
935 rxrpc_put_client_conn(conn);
936 else
937 rxrpc_put_service_conn(conn);
938}
939
940static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
941 unsigned long expire_at)
942{
943 timer_reduce(&conn->timer, expire_at);
944}
945
946
947
948
949struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
950 struct sk_buff *);
951struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
952void rxrpc_new_incoming_connection(struct rxrpc_sock *,
953 struct rxrpc_connection *, struct sk_buff *);
954void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
955
956
957
958
959void rxrpc_data_ready(struct sock *);
960
961
962
963
964extern const struct rxrpc_security rxrpc_no_security;
965
966
967
968
969extern struct key_type key_type_rxrpc;
970extern struct key_type key_type_rxrpc_s;
971
972int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
973int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
974int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
975 u32);
976
977
978
979
980extern void rxrpc_process_local_events(struct rxrpc_local *);
981
982
983
984
985struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
986struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
987struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
988void rxrpc_put_local(struct rxrpc_local *);
989void rxrpc_queue_local(struct rxrpc_local *);
990void rxrpc_destroy_all_locals(struct rxrpc_net *);
991
992
993
994
995extern unsigned int rxrpc_max_backlog __read_mostly;
996extern unsigned long rxrpc_requested_ack_delay;
997extern unsigned long rxrpc_soft_ack_delay;
998extern unsigned long rxrpc_idle_ack_delay;
999extern unsigned int rxrpc_rx_window_size;
1000extern unsigned int rxrpc_rx_mtu;
1001extern unsigned int rxrpc_rx_jumbo_max;
1002extern unsigned long rxrpc_resend_timeout;
1003
1004extern const s8 rxrpc_ack_priority[];
1005
1006
1007
1008
1009extern unsigned int rxrpc_net_id;
1010extern struct pernet_operations rxrpc_net_ops;
1011
1012static inline struct rxrpc_net *rxrpc_net(struct net *net)
1013{
1014 return net_generic(net, rxrpc_net_id);
1015}
1016
1017
1018
1019
1020int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
1021int rxrpc_send_abort_packet(struct rxrpc_call *);
1022int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
1023void rxrpc_reject_packets(struct rxrpc_local *);
1024void rxrpc_send_keepalive(struct rxrpc_peer *);
1025
1026
1027
1028
1029void rxrpc_error_report(struct sock *);
1030void rxrpc_peer_error_distributor(struct work_struct *);
1031void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1032 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1033void rxrpc_peer_keepalive_worker(struct work_struct *);
1034
1035
1036
1037
1038struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1039 const struct sockaddr_rxrpc *);
1040struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
1041 struct sockaddr_rxrpc *, gfp_t);
1042struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1043struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *,
1044 struct rxrpc_peer *);
1045void rxrpc_destroy_all_peers(struct rxrpc_net *);
1046struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
1047struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
1048void rxrpc_put_peer(struct rxrpc_peer *);
1049void __rxrpc_queue_peer_error(struct rxrpc_peer *);
1050
1051
1052
1053
1054extern const struct file_operations rxrpc_call_seq_fops;
1055extern const struct file_operations rxrpc_connection_seq_fops;
1056
1057
1058
1059
1060void rxrpc_notify_socket(struct rxrpc_call *);
1061int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1062
1063
1064
1065
1066#ifdef CONFIG_RXKAD
1067extern const struct rxrpc_security rxkad;
1068#endif
1069
1070
1071
1072
1073int __init rxrpc_init_security(void);
1074void rxrpc_exit_security(void);
1075int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1076int rxrpc_init_server_conn_security(struct rxrpc_connection *);
1077
1078
1079
1080
1081int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1082
1083
1084
1085
1086void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1087void rxrpc_packet_destructor(struct sk_buff *);
1088void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1089void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1090void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1091void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1092void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
1093void rxrpc_purge_queue(struct sk_buff_head *);
1094
1095
1096
1097
1098#ifdef CONFIG_SYSCTL
1099extern int __init rxrpc_sysctl_init(void);
1100extern void rxrpc_sysctl_exit(void);
1101#else
1102static inline int __init rxrpc_sysctl_init(void) { return 0; }
1103static inline void rxrpc_sysctl_exit(void) {}
1104#endif
1105
1106
1107
1108
1109int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *,
1110 struct sk_buff *);
1111
1112static inline bool before(u32 seq1, u32 seq2)
1113{
1114 return (s32)(seq1 - seq2) < 0;
1115}
1116static inline bool before_eq(u32 seq1, u32 seq2)
1117{
1118 return (s32)(seq1 - seq2) <= 0;
1119}
1120static inline bool after(u32 seq1, u32 seq2)
1121{
1122 return (s32)(seq1 - seq2) > 0;
1123}
1124static inline bool after_eq(u32 seq1, u32 seq2)
1125{
1126 return (s32)(seq1 - seq2) >= 0;
1127}
1128
1129
1130
1131
1132extern unsigned int rxrpc_debug;
1133
1134#define dbgprintk(FMT,...) \
1135 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1136
1137#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1138#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1139#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1140#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1141#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1142
1143
1144#if defined(__KDEBUG)
1145#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1146#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1147#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1148#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1149#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1150
1151#elif defined(CONFIG_AF_RXRPC_DEBUG)
1152#define RXRPC_DEBUG_KENTER 0x01
1153#define RXRPC_DEBUG_KLEAVE 0x02
1154#define RXRPC_DEBUG_KDEBUG 0x04
1155#define RXRPC_DEBUG_KPROTO 0x08
1156#define RXRPC_DEBUG_KNET 0x10
1157
1158#define _enter(FMT,...) \
1159do { \
1160 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1161 kenter(FMT,##__VA_ARGS__); \
1162} while (0)
1163
1164#define _leave(FMT,...) \
1165do { \
1166 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1167 kleave(FMT,##__VA_ARGS__); \
1168} while (0)
1169
1170#define _debug(FMT,...) \
1171do { \
1172 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1173 kdebug(FMT,##__VA_ARGS__); \
1174} while (0)
1175
1176#define _proto(FMT,...) \
1177do { \
1178 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1179 kproto(FMT,##__VA_ARGS__); \
1180} while (0)
1181
1182#define _net(FMT,...) \
1183do { \
1184 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1185 knet(FMT,##__VA_ARGS__); \
1186} while (0)
1187
1188#else
1189#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1190#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1191#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1192#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1193#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1194#endif
1195
1196
1197
1198
1199#if 1
1200
1201#define ASSERT(X) \
1202do { \
1203 if (unlikely(!(X))) { \
1204 pr_err("Assertion failed\n"); \
1205 BUG(); \
1206 } \
1207} while (0)
1208
1209#define ASSERTCMP(X, OP, Y) \
1210do { \
1211 __typeof__(X) _x = (X); \
1212 __typeof__(Y) _y = (__typeof__(X))(Y); \
1213 if (unlikely(!(_x OP _y))) { \
1214 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1215 (unsigned long)_x, (unsigned long)_x, #OP, \
1216 (unsigned long)_y, (unsigned long)_y); \
1217 BUG(); \
1218 } \
1219} while (0)
1220
1221#define ASSERTIF(C, X) \
1222do { \
1223 if (unlikely((C) && !(X))) { \
1224 pr_err("Assertion failed\n"); \
1225 BUG(); \
1226 } \
1227} while (0)
1228
1229#define ASSERTIFCMP(C, X, OP, Y) \
1230do { \
1231 __typeof__(X) _x = (X); \
1232 __typeof__(Y) _y = (__typeof__(X))(Y); \
1233 if (unlikely((C) && !(_x OP _y))) { \
1234 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1235 (unsigned long)_x, (unsigned long)_x, #OP, \
1236 (unsigned long)_y, (unsigned long)_y); \
1237 BUG(); \
1238 } \
1239} while (0)
1240
1241#else
1242
1243#define ASSERT(X) \
1244do { \
1245} while (0)
1246
1247#define ASSERTCMP(X, OP, Y) \
1248do { \
1249} while (0)
1250
1251#define ASSERTIF(C, X) \
1252do { \
1253} while (0)
1254
1255#define ASSERTIFCMP(C, X, OP, Y) \
1256do { \
1257} while (0)
1258
1259#endif
1260