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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
45
46enum rxrpc_skb_mark {
47 RXRPC_SKB_MARK_REJECT_BUSY,
48 RXRPC_SKB_MARK_REJECT_ABORT,
49};
50
51
52
53
54enum {
55 RXRPC_UNBOUND = 0,
56 RXRPC_CLIENT_UNBOUND,
57 RXRPC_CLIENT_BOUND,
58 RXRPC_SERVER_BOUND,
59 RXRPC_SERVER_BOUND2,
60 RXRPC_SERVER_LISTENING,
61 RXRPC_SERVER_LISTEN_DISABLED,
62 RXRPC_CLOSE,
63};
64
65
66
67
68struct rxrpc_net {
69 struct proc_dir_entry *proc_net;
70 u32 epoch;
71 struct list_head calls;
72 rwlock_t call_lock;
73 atomic_t nr_calls;
74
75 atomic_t nr_conns;
76 struct list_head conn_proc_list;
77 struct list_head service_conns;
78 rwlock_t conn_lock;
79 struct work_struct service_conn_reaper;
80 struct timer_list service_conn_reap_timer;
81
82 unsigned int nr_client_conns;
83 unsigned int nr_active_client_conns;
84 bool kill_all_client_conns;
85 bool live;
86 spinlock_t client_conn_cache_lock;
87 spinlock_t client_conn_discard_lock;
88 struct list_head waiting_client_conns;
89 struct list_head active_client_conns;
90 struct list_head idle_client_conns;
91 struct work_struct client_conn_reaper;
92 struct timer_list client_conn_reap_timer;
93
94 struct list_head local_endpoints;
95 struct mutex local_mutex;
96
97 DECLARE_HASHTABLE (peer_hash, 10);
98 spinlock_t peer_hash_lock;
99
100#define RXRPC_KEEPALIVE_TIME 20
101 u8 peer_keepalive_cursor;
102 time64_t peer_keepalive_base;
103 struct list_head peer_keepalive[32];
104 struct list_head peer_keepalive_new;
105 struct timer_list peer_keepalive_timer;
106 struct work_struct peer_keepalive_work;
107};
108
109
110
111
112
113
114
115
116
117struct rxrpc_backlog {
118 unsigned short peer_backlog_head;
119 unsigned short peer_backlog_tail;
120 unsigned short conn_backlog_head;
121 unsigned short conn_backlog_tail;
122 unsigned short call_backlog_head;
123 unsigned short call_backlog_tail;
124#define RXRPC_BACKLOG_MAX 32
125 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
126 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
127 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
128};
129
130
131
132
133struct rxrpc_sock {
134
135 struct sock sk;
136 rxrpc_notify_new_call_t notify_new_call;
137 rxrpc_discard_new_call_t discard_new_call;
138 struct rxrpc_local *local;
139 struct rxrpc_backlog *backlog;
140 spinlock_t incoming_lock;
141 struct list_head sock_calls;
142 struct list_head to_be_accepted;
143 struct list_head recvmsg_q;
144 rwlock_t recvmsg_lock;
145 struct key *key;
146 struct key *securities;
147 struct rb_root calls;
148 unsigned long flags;
149#define RXRPC_SOCK_CONNECTED 0
150 rwlock_t call_lock;
151 u32 min_sec_level;
152#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
153 bool exclusive;
154 u16 second_service;
155 struct {
156
157 u16 from;
158 u16 to;
159 } service_upgrade;
160 sa_family_t family;
161 struct sockaddr_rxrpc srx;
162 struct sockaddr_rxrpc connect_srx;
163};
164
165#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
166
167
168
169
170struct rxrpc_host_header {
171 u32 epoch;
172 u32 cid;
173 u32 callNumber;
174 u32 seq;
175 u32 serial;
176 u8 type;
177 u8 flags;
178 u8 userStatus;
179 u8 securityIndex;
180 union {
181 u16 _rsvd;
182 u16 cksum;
183 };
184 u16 serviceId;
185} __packed;
186
187
188
189
190
191struct rxrpc_skb_priv {
192 union {
193 u8 nr_jumbo;
194 };
195 union {
196 int remain;
197 };
198
199 struct rxrpc_host_header hdr;
200};
201
202#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
203
204
205
206
207struct rxrpc_security {
208 const char *name;
209 u8 security_index;
210
211
212 int (*init)(void);
213
214
215 void (*exit)(void);
216
217
218 int (*init_connection_security)(struct rxrpc_connection *);
219
220
221 int (*prime_packet_security)(struct rxrpc_connection *);
222
223
224 int (*secure_packet)(struct rxrpc_call *,
225 struct sk_buff *,
226 size_t,
227 void *);
228
229
230 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
231 unsigned int, unsigned int, rxrpc_seq_t, u16);
232
233
234 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
235 unsigned int *, unsigned int *);
236
237
238 int (*issue_challenge)(struct rxrpc_connection *);
239
240
241 int (*respond_to_challenge)(struct rxrpc_connection *,
242 struct sk_buff *,
243 u32 *);
244
245
246 int (*verify_response)(struct rxrpc_connection *,
247 struct sk_buff *,
248 u32 *);
249
250
251 void (*clear)(struct rxrpc_connection *);
252};
253
254
255
256
257
258
259struct rxrpc_local {
260 struct rcu_head rcu;
261 atomic_t usage;
262 struct rxrpc_net *rxnet;
263 struct list_head link;
264 struct socket *socket;
265 struct work_struct processor;
266 struct rxrpc_sock __rcu *service;
267 struct rw_semaphore defrag_sem;
268 struct sk_buff_head reject_queue;
269 struct sk_buff_head event_queue;
270 struct rb_root client_conns;
271 spinlock_t client_conns_lock;
272 spinlock_t lock;
273 rwlock_t services_lock;
274 int debug_id;
275 bool dead;
276 bool service_closed;
277 struct sockaddr_rxrpc srx;
278};
279
280
281
282
283
284struct rxrpc_peer {
285 struct rcu_head rcu;
286 atomic_t usage;
287 unsigned long hash_key;
288 struct hlist_node hash_link;
289 struct rxrpc_local *local;
290 struct hlist_head error_targets;
291 struct rb_root service_conns;
292 struct list_head keepalive_link;
293 time64_t last_tx_at;
294 seqlock_t service_conn_lock;
295 spinlock_t lock;
296 unsigned int if_mtu;
297 unsigned int mtu;
298 unsigned int maxdata;
299 unsigned short hdrsize;
300 int debug_id;
301 struct sockaddr_rxrpc srx;
302
303
304#define RXRPC_RTT_CACHE_SIZE 32
305 spinlock_t rtt_input_lock;
306 ktime_t rtt_last_req;
307 u64 rtt;
308 u64 rtt_sum;
309 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE];
310 u8 rtt_cursor;
311 u8 rtt_usage;
312
313 u8 cong_cwnd;
314};
315
316
317
318
319struct rxrpc_conn_proto {
320 union {
321 struct {
322 u32 epoch;
323 u32 cid;
324 };
325 u64 index_key;
326 };
327};
328
329struct rxrpc_conn_parameters {
330 struct rxrpc_local *local;
331 struct rxrpc_peer *peer;
332 struct key *key;
333 bool exclusive;
334 bool upgrade;
335 u16 service_id;
336 u32 security_level;
337};
338
339
340
341
342enum rxrpc_conn_flag {
343 RXRPC_CONN_HAS_IDR,
344 RXRPC_CONN_IN_SERVICE_CONNS,
345 RXRPC_CONN_IN_CLIENT_CONNS,
346 RXRPC_CONN_EXPOSED,
347 RXRPC_CONN_DONT_REUSE,
348 RXRPC_CONN_COUNTED,
349 RXRPC_CONN_PROBING_FOR_UPGRADE,
350 RXRPC_CONN_FINAL_ACK_0,
351 RXRPC_CONN_FINAL_ACK_1,
352 RXRPC_CONN_FINAL_ACK_2,
353 RXRPC_CONN_FINAL_ACK_3,
354};
355
356#define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
357 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
358 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
359 (1UL << RXRPC_CONN_FINAL_ACK_3))
360
361
362
363
364enum rxrpc_conn_event {
365 RXRPC_CONN_EV_CHALLENGE,
366};
367
368
369
370
371enum rxrpc_conn_cache_state {
372 RXRPC_CONN_CLIENT_INACTIVE,
373 RXRPC_CONN_CLIENT_WAITING,
374 RXRPC_CONN_CLIENT_ACTIVE,
375 RXRPC_CONN_CLIENT_UPGRADE,
376 RXRPC_CONN_CLIENT_CULLED,
377 RXRPC_CONN_CLIENT_IDLE,
378 RXRPC_CONN__NR_CACHE_STATES
379};
380
381
382
383
384enum rxrpc_conn_proto_state {
385 RXRPC_CONN_UNUSED,
386 RXRPC_CONN_CLIENT,
387 RXRPC_CONN_SERVICE_PREALLOC,
388 RXRPC_CONN_SERVICE_UNSECURED,
389 RXRPC_CONN_SERVICE_CHALLENGING,
390 RXRPC_CONN_SERVICE,
391 RXRPC_CONN_REMOTELY_ABORTED,
392 RXRPC_CONN_LOCALLY_ABORTED,
393 RXRPC_CONN__NR_STATES
394};
395
396
397
398
399
400
401struct rxrpc_connection {
402 struct rxrpc_conn_proto proto;
403 struct rxrpc_conn_parameters params;
404
405 atomic_t usage;
406 struct rcu_head rcu;
407 struct list_head cache_link;
408
409 spinlock_t channel_lock;
410 unsigned char active_chans;
411#define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
412 struct list_head waiting_calls;
413 struct rxrpc_channel {
414 unsigned long final_ack_at;
415 struct rxrpc_call __rcu *call;
416 unsigned int call_debug_id;
417 u32 call_id;
418 u32 call_counter;
419 u32 last_call;
420 u8 last_type;
421 union {
422 u32 last_seq;
423 u32 last_abort;
424 };
425 } channels[RXRPC_MAXCALLS];
426
427 struct timer_list timer;
428 struct work_struct processor;
429 union {
430 struct rb_node client_node;
431 struct rb_node service_node;
432 };
433 struct list_head proc_link;
434 struct list_head link;
435 struct sk_buff_head rx_queue;
436 const struct rxrpc_security *security;
437 struct key *server_key;
438 struct crypto_skcipher *cipher;
439 struct rxrpc_crypt csum_iv;
440 unsigned long flags;
441 unsigned long events;
442 unsigned long idle_timestamp;
443 spinlock_t state_lock;
444 enum rxrpc_conn_cache_state cache_state;
445 enum rxrpc_conn_proto_state state;
446 u32 abort_code;
447 int debug_id;
448 atomic_t serial;
449 unsigned int hi_serial;
450 u32 security_nonce;
451 u32 service_id;
452 u8 size_align;
453 u8 security_size;
454 u8 security_ix;
455 u8 out_clientflag;
456 short error;
457};
458
459static inline bool rxrpc_to_server(const struct rxrpc_skb_priv *sp)
460{
461 return sp->hdr.flags & RXRPC_CLIENT_INITIATED;
462}
463
464static inline bool rxrpc_to_client(const struct rxrpc_skb_priv *sp)
465{
466 return !rxrpc_to_server(sp);
467}
468
469
470
471
472enum rxrpc_call_flag {
473 RXRPC_CALL_RELEASED,
474 RXRPC_CALL_HAS_USERID,
475 RXRPC_CALL_IS_SERVICE,
476 RXRPC_CALL_EXPOSED,
477 RXRPC_CALL_RX_LAST,
478 RXRPC_CALL_TX_LAST,
479 RXRPC_CALL_TX_LASTQ,
480 RXRPC_CALL_SEND_PING,
481 RXRPC_CALL_PINGING,
482 RXRPC_CALL_RETRANS_TIMEOUT,
483 RXRPC_CALL_BEGAN_RX_TIMER,
484 RXRPC_CALL_RX_HEARD,
485 RXRPC_CALL_RX_UNDERRUN,
486};
487
488
489
490
491enum rxrpc_call_event {
492 RXRPC_CALL_EV_ACK,
493 RXRPC_CALL_EV_ABORT,
494 RXRPC_CALL_EV_RESEND,
495 RXRPC_CALL_EV_PING,
496 RXRPC_CALL_EV_EXPIRED,
497 RXRPC_CALL_EV_ACK_LOST,
498};
499
500
501
502
503enum rxrpc_call_state {
504 RXRPC_CALL_UNINITIALISED,
505 RXRPC_CALL_CLIENT_AWAIT_CONN,
506 RXRPC_CALL_CLIENT_SEND_REQUEST,
507 RXRPC_CALL_CLIENT_AWAIT_REPLY,
508 RXRPC_CALL_CLIENT_RECV_REPLY,
509 RXRPC_CALL_SERVER_PREALLOC,
510 RXRPC_CALL_SERVER_SECURING,
511 RXRPC_CALL_SERVER_ACCEPTING,
512 RXRPC_CALL_SERVER_RECV_REQUEST,
513 RXRPC_CALL_SERVER_ACK_REQUEST,
514 RXRPC_CALL_SERVER_SEND_REPLY,
515 RXRPC_CALL_SERVER_AWAIT_ACK,
516 RXRPC_CALL_COMPLETE,
517 NR__RXRPC_CALL_STATES
518};
519
520
521
522
523enum rxrpc_congest_mode {
524 RXRPC_CALL_SLOW_START,
525 RXRPC_CALL_CONGEST_AVOIDANCE,
526 RXRPC_CALL_PACKET_LOSS,
527 RXRPC_CALL_FAST_RETRANSMIT,
528 NR__RXRPC_CONGEST_MODES
529};
530
531
532
533
534
535struct rxrpc_call {
536 struct rcu_head rcu;
537 struct rxrpc_connection *conn;
538 struct rxrpc_peer *peer;
539 struct rxrpc_sock __rcu *socket;
540 struct rxrpc_net *rxnet;
541 struct mutex user_mutex;
542 unsigned long ack_at;
543 unsigned long ack_lost_at;
544 unsigned long resend_at;
545 unsigned long ping_at;
546 unsigned long keepalive_at;
547 unsigned long expect_rx_by;
548 unsigned long expect_req_by;
549 unsigned long expect_term_by;
550 u32 next_rx_timo;
551 u32 next_req_timo;
552 struct timer_list timer;
553 struct work_struct processor;
554 rxrpc_notify_rx_t notify_rx;
555 struct list_head link;
556 struct list_head chan_wait_link;
557 struct hlist_node error_link;
558 struct list_head accept_link;
559 struct list_head recvmsg_link;
560 struct list_head sock_link;
561 struct rb_node sock_node;
562 struct sk_buff *tx_pending;
563 wait_queue_head_t waitq;
564 s64 tx_total_len;
565 __be32 crypto_buf[2];
566 unsigned long user_call_ID;
567 unsigned long flags;
568 unsigned long events;
569 spinlock_t lock;
570 spinlock_t notify_lock;
571 rwlock_t state_lock;
572 u32 abort_code;
573 int error;
574 enum rxrpc_call_state state;
575 enum rxrpc_call_completion completion;
576 atomic_t usage;
577 u16 service_id;
578 u8 security_ix;
579 u32 call_id;
580 u32 cid;
581 int debug_id;
582 unsigned short rx_pkt_offset;
583 unsigned short rx_pkt_len;
584
585
586
587
588
589
590
591
592
593
594#define RXRPC_RXTX_BUFF_SIZE 64
595#define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
596#define RXRPC_INIT_RX_WINDOW_SIZE 63
597 struct sk_buff **rxtx_buffer;
598 u8 *rxtx_annotations;
599#define RXRPC_TX_ANNO_ACK 0
600#define RXRPC_TX_ANNO_UNACK 1
601#define RXRPC_TX_ANNO_NAK 2
602#define RXRPC_TX_ANNO_RETRANS 3
603#define RXRPC_TX_ANNO_MASK 0x03
604#define RXRPC_TX_ANNO_LAST 0x04
605#define RXRPC_TX_ANNO_RESENT 0x08
606
607#define RXRPC_RX_ANNO_JUMBO 0x3f
608#define RXRPC_RX_ANNO_JLAST 0x40
609#define RXRPC_RX_ANNO_VERIFIED 0x80
610 rxrpc_seq_t tx_hard_ack;
611
612
613 rxrpc_seq_t tx_top;
614
615
616
617
618
619#define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
620 u8 cong_cwnd;
621 u8 cong_extra;
622 u8 cong_ssthresh;
623 enum rxrpc_congest_mode cong_mode:8;
624 u8 cong_dup_acks;
625 u8 cong_cumul_acks;
626 ktime_t cong_tstamp;
627
628 rxrpc_seq_t rx_hard_ack;
629
630
631 rxrpc_seq_t rx_top;
632 rxrpc_seq_t rx_expect_next;
633 rxrpc_serial_t rx_serial;
634 u8 rx_winsize;
635 u8 tx_winsize;
636 bool tx_phase;
637 u8 nr_jumbo_bad;
638
639 spinlock_t input_lock;
640
641
642 u8 ackr_reason;
643 u16 ackr_skew;
644 rxrpc_serial_t ackr_serial;
645 rxrpc_seq_t ackr_prev_seq;
646 rxrpc_seq_t ackr_consumed;
647 rxrpc_seq_t ackr_seen;
648
649
650 rxrpc_serial_t ping_serial;
651 ktime_t ping_time;
652
653
654 ktime_t acks_latest_ts;
655 rxrpc_serial_t acks_latest;
656 rxrpc_seq_t acks_lowest_nak;
657 rxrpc_seq_t acks_lost_top;
658 rxrpc_serial_t acks_lost_ping;
659};
660
661
662
663
664struct rxrpc_ack_summary {
665 u8 ack_reason;
666 u8 nr_acks;
667 u8 nr_nacks;
668 u8 nr_new_acks;
669 u8 nr_new_nacks;
670 u8 nr_rot_new_acks;
671 bool new_low_nack;
672 bool retrans_timeo;
673 u8 flight_size;
674
675 enum rxrpc_congest_mode mode:8;
676 u8 cwnd;
677 u8 ssthresh;
678 u8 dup_acks;
679 u8 cumulative_acks;
680};
681
682
683
684
685enum rxrpc_command {
686 RXRPC_CMD_SEND_DATA,
687 RXRPC_CMD_SEND_ABORT,
688 RXRPC_CMD_ACCEPT,
689 RXRPC_CMD_REJECT_BUSY,
690};
691
692struct rxrpc_call_params {
693 s64 tx_total_len;
694 unsigned long user_call_ID;
695 struct {
696 u32 hard;
697 u32 idle;
698 u32 normal;
699 } timeouts;
700 u8 nr_timeouts;
701};
702
703struct rxrpc_send_params {
704 struct rxrpc_call_params call;
705 u32 abort_code;
706 enum rxrpc_command command : 8;
707 bool exclusive;
708 bool upgrade;
709};
710
711#include <trace/events/rxrpc.h>
712
713
714
715
716extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
717extern struct workqueue_struct *rxrpc_workqueue;
718
719
720
721
722int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
723void rxrpc_discard_prealloc(struct rxrpc_sock *);
724struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
725 struct rxrpc_sock *,
726 struct sk_buff *);
727void rxrpc_accept_incoming_calls(struct rxrpc_local *);
728struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
729 rxrpc_notify_rx_t);
730int rxrpc_reject_call(struct rxrpc_sock *);
731
732
733
734
735void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
736 enum rxrpc_propose_ack_trace);
737void rxrpc_process_call(struct work_struct *);
738
739static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
740 unsigned long expire_at,
741 unsigned long now,
742 enum rxrpc_timer_trace why)
743{
744 trace_rxrpc_timer(call, why, now);
745 timer_reduce(&call->timer, expire_at);
746}
747
748
749
750
751extern const char *const rxrpc_call_states[];
752extern const char *const rxrpc_call_completions[];
753extern unsigned int rxrpc_max_call_lifetime;
754extern struct kmem_cache *rxrpc_call_jar;
755
756struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
757struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
758struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
759 struct rxrpc_conn_parameters *,
760 struct sockaddr_rxrpc *,
761 struct rxrpc_call_params *, gfp_t,
762 unsigned int);
763int rxrpc_retry_client_call(struct rxrpc_sock *,
764 struct rxrpc_call *,
765 struct rxrpc_conn_parameters *,
766 struct sockaddr_rxrpc *,
767 gfp_t);
768void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
769 struct sk_buff *);
770void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
771int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *);
772void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
773bool __rxrpc_queue_call(struct rxrpc_call *);
774bool rxrpc_queue_call(struct rxrpc_call *);
775void rxrpc_see_call(struct rxrpc_call *);
776void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
777void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
778void rxrpc_cleanup_call(struct rxrpc_call *);
779void rxrpc_destroy_all_calls(struct rxrpc_net *);
780
781static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
782{
783 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
784}
785
786static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
787{
788 return !rxrpc_is_service_call(call);
789}
790
791
792
793
794static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
795 enum rxrpc_call_completion compl,
796 u32 abort_code,
797 int error)
798{
799 if (call->state < RXRPC_CALL_COMPLETE) {
800 call->abort_code = abort_code;
801 call->error = error;
802 call->completion = compl,
803 call->state = RXRPC_CALL_COMPLETE;
804 trace_rxrpc_call_complete(call);
805 wake_up(&call->waitq);
806 return true;
807 }
808 return false;
809}
810
811static 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 bool ret;
817
818 write_lock_bh(&call->state_lock);
819 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
820 write_unlock_bh(&call->state_lock);
821 return ret;
822}
823
824
825
826
827static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
828{
829 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
830}
831
832static inline bool rxrpc_call_completed(struct rxrpc_call *call)
833{
834 bool ret;
835
836 write_lock_bh(&call->state_lock);
837 ret = __rxrpc_call_completed(call);
838 write_unlock_bh(&call->state_lock);
839 return ret;
840}
841
842
843
844
845static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
846 rxrpc_seq_t seq,
847 u32 abort_code, int error)
848{
849 trace_rxrpc_abort(call->debug_id, why, call->cid, call->call_id, seq,
850 abort_code, error);
851 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
852 abort_code, error);
853}
854
855static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
856 rxrpc_seq_t seq, u32 abort_code, int error)
857{
858 bool ret;
859
860 write_lock_bh(&call->state_lock);
861 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
862 write_unlock_bh(&call->state_lock);
863 return ret;
864}
865
866
867
868
869static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
870 struct sk_buff *skb,
871 const char *eproto_why,
872 const char *why,
873 u32 abort_code)
874{
875 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
876
877 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
878 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
879}
880
881#define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
882 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
883 (abort_why), (abort_code))
884
885
886
887
888extern unsigned int rxrpc_max_client_connections;
889extern unsigned int rxrpc_reap_client_connections;
890extern unsigned long rxrpc_conn_idle_client_expiry;
891extern unsigned long rxrpc_conn_idle_client_fast_expiry;
892extern struct idr rxrpc_client_conn_ids;
893
894void rxrpc_destroy_client_conn_ids(void);
895int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_call *,
896 struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *,
897 gfp_t);
898void rxrpc_expose_client_call(struct rxrpc_call *);
899void rxrpc_disconnect_client_call(struct rxrpc_call *);
900void rxrpc_put_client_conn(struct rxrpc_connection *);
901void rxrpc_discard_expired_client_conns(struct work_struct *);
902void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
903
904
905
906
907void rxrpc_process_connection(struct work_struct *);
908
909
910
911
912extern unsigned int rxrpc_connection_expiry;
913extern unsigned int rxrpc_closed_conn_expiry;
914
915struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
916struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
917 struct sk_buff *,
918 struct rxrpc_peer **);
919void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
920void rxrpc_disconnect_call(struct rxrpc_call *);
921void rxrpc_kill_connection(struct rxrpc_connection *);
922bool rxrpc_queue_conn(struct rxrpc_connection *);
923void rxrpc_see_connection(struct rxrpc_connection *);
924void rxrpc_get_connection(struct rxrpc_connection *);
925struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
926void rxrpc_put_service_conn(struct rxrpc_connection *);
927void rxrpc_service_connection_reaper(struct work_struct *);
928void rxrpc_destroy_all_connections(struct rxrpc_net *);
929
930static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
931{
932 return conn->out_clientflag;
933}
934
935static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
936{
937 return !rxrpc_conn_is_client(conn);
938}
939
940static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
941{
942 if (!conn)
943 return;
944
945 if (rxrpc_conn_is_client(conn))
946 rxrpc_put_client_conn(conn);
947 else
948 rxrpc_put_service_conn(conn);
949}
950
951static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
952 unsigned long expire_at)
953{
954 timer_reduce(&conn->timer, expire_at);
955}
956
957
958
959
960struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
961 struct sk_buff *);
962struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
963void rxrpc_new_incoming_connection(struct rxrpc_sock *,
964 struct rxrpc_connection *, struct sk_buff *);
965void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
966
967
968
969
970int rxrpc_input_packet(struct sock *, struct sk_buff *);
971
972
973
974
975extern const struct rxrpc_security rxrpc_no_security;
976
977
978
979
980extern struct key_type key_type_rxrpc;
981extern struct key_type key_type_rxrpc_s;
982
983int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
984int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
985int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
986 u32);
987
988
989
990
991extern void rxrpc_process_local_events(struct rxrpc_local *);
992
993
994
995
996struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
997struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
998struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
999void rxrpc_put_local(struct rxrpc_local *);
1000void rxrpc_queue_local(struct rxrpc_local *);
1001void rxrpc_destroy_all_locals(struct rxrpc_net *);
1002
1003
1004
1005
1006extern unsigned int rxrpc_max_backlog __read_mostly;
1007extern unsigned long rxrpc_requested_ack_delay;
1008extern unsigned long rxrpc_soft_ack_delay;
1009extern unsigned long rxrpc_idle_ack_delay;
1010extern unsigned int rxrpc_rx_window_size;
1011extern unsigned int rxrpc_rx_mtu;
1012extern unsigned int rxrpc_rx_jumbo_max;
1013extern unsigned long rxrpc_resend_timeout;
1014
1015extern const s8 rxrpc_ack_priority[];
1016
1017
1018
1019
1020extern unsigned int rxrpc_net_id;
1021extern struct pernet_operations rxrpc_net_ops;
1022
1023static inline struct rxrpc_net *rxrpc_net(struct net *net)
1024{
1025 return net_generic(net, rxrpc_net_id);
1026}
1027
1028
1029
1030
1031int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
1032int rxrpc_send_abort_packet(struct rxrpc_call *);
1033int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
1034void rxrpc_reject_packets(struct rxrpc_local *);
1035void rxrpc_send_keepalive(struct rxrpc_peer *);
1036
1037
1038
1039
1040void rxrpc_error_report(struct sock *);
1041void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1042 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1043void rxrpc_peer_keepalive_worker(struct work_struct *);
1044
1045
1046
1047
1048struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1049 const struct sockaddr_rxrpc *);
1050struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_sock *, struct rxrpc_local *,
1051 struct sockaddr_rxrpc *, gfp_t);
1052struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1053void rxrpc_new_incoming_peer(struct rxrpc_sock *, struct rxrpc_local *,
1054 struct rxrpc_peer *);
1055void rxrpc_destroy_all_peers(struct rxrpc_net *);
1056struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *);
1057struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *);
1058void rxrpc_put_peer(struct rxrpc_peer *);
1059
1060
1061
1062
1063extern const struct seq_operations rxrpc_call_seq_ops;
1064extern const struct seq_operations rxrpc_connection_seq_ops;
1065
1066
1067
1068
1069void rxrpc_notify_socket(struct rxrpc_call *);
1070int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1071
1072
1073
1074
1075#ifdef CONFIG_RXKAD
1076extern const struct rxrpc_security rxkad;
1077#endif
1078
1079
1080
1081
1082int __init rxrpc_init_security(void);
1083void rxrpc_exit_security(void);
1084int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1085int rxrpc_init_server_conn_security(struct rxrpc_connection *);
1086
1087
1088
1089
1090int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1091
1092
1093
1094
1095void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1096void rxrpc_packet_destructor(struct sk_buff *);
1097void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1098void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1099void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1100void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1101void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
1102void rxrpc_purge_queue(struct sk_buff_head *);
1103
1104
1105
1106
1107#ifdef CONFIG_SYSCTL
1108extern int __init rxrpc_sysctl_init(void);
1109extern void rxrpc_sysctl_exit(void);
1110#else
1111static inline int __init rxrpc_sysctl_init(void) { return 0; }
1112static inline void rxrpc_sysctl_exit(void) {}
1113#endif
1114
1115
1116
1117
1118int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *,
1119 struct sk_buff *);
1120
1121static inline bool before(u32 seq1, u32 seq2)
1122{
1123 return (s32)(seq1 - seq2) < 0;
1124}
1125static inline bool before_eq(u32 seq1, u32 seq2)
1126{
1127 return (s32)(seq1 - seq2) <= 0;
1128}
1129static inline bool after(u32 seq1, u32 seq2)
1130{
1131 return (s32)(seq1 - seq2) > 0;
1132}
1133static inline bool after_eq(u32 seq1, u32 seq2)
1134{
1135 return (s32)(seq1 - seq2) >= 0;
1136}
1137
1138
1139
1140
1141extern unsigned int rxrpc_debug;
1142
1143#define dbgprintk(FMT,...) \
1144 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1145
1146#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1147#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1148#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1149#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1150#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1151
1152
1153#if defined(__KDEBUG)
1154#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1155#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1156#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1157#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1158#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1159
1160#elif defined(CONFIG_AF_RXRPC_DEBUG)
1161#define RXRPC_DEBUG_KENTER 0x01
1162#define RXRPC_DEBUG_KLEAVE 0x02
1163#define RXRPC_DEBUG_KDEBUG 0x04
1164#define RXRPC_DEBUG_KPROTO 0x08
1165#define RXRPC_DEBUG_KNET 0x10
1166
1167#define _enter(FMT,...) \
1168do { \
1169 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1170 kenter(FMT,##__VA_ARGS__); \
1171} while (0)
1172
1173#define _leave(FMT,...) \
1174do { \
1175 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1176 kleave(FMT,##__VA_ARGS__); \
1177} while (0)
1178
1179#define _debug(FMT,...) \
1180do { \
1181 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1182 kdebug(FMT,##__VA_ARGS__); \
1183} while (0)
1184
1185#define _proto(FMT,...) \
1186do { \
1187 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1188 kproto(FMT,##__VA_ARGS__); \
1189} while (0)
1190
1191#define _net(FMT,...) \
1192do { \
1193 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1194 knet(FMT,##__VA_ARGS__); \
1195} while (0)
1196
1197#else
1198#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1199#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1200#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1201#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1202#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1203#endif
1204
1205
1206
1207
1208#if 1
1209
1210#define ASSERT(X) \
1211do { \
1212 if (unlikely(!(X))) { \
1213 pr_err("Assertion failed\n"); \
1214 BUG(); \
1215 } \
1216} while (0)
1217
1218#define ASSERTCMP(X, OP, Y) \
1219do { \
1220 __typeof__(X) _x = (X); \
1221 __typeof__(Y) _y = (__typeof__(X))(Y); \
1222 if (unlikely(!(_x OP _y))) { \
1223 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1224 (unsigned long)_x, (unsigned long)_x, #OP, \
1225 (unsigned long)_y, (unsigned long)_y); \
1226 BUG(); \
1227 } \
1228} while (0)
1229
1230#define ASSERTIF(C, X) \
1231do { \
1232 if (unlikely((C) && !(X))) { \
1233 pr_err("Assertion failed\n"); \
1234 BUG(); \
1235 } \
1236} while (0)
1237
1238#define ASSERTIFCMP(C, X, OP, Y) \
1239do { \
1240 __typeof__(X) _x = (X); \
1241 __typeof__(Y) _y = (__typeof__(X))(Y); \
1242 if (unlikely((C) && !(_x OP _y))) { \
1243 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1244 (unsigned long)_x, (unsigned long)_x, #OP, \
1245 (unsigned long)_y, (unsigned long)_y); \
1246 BUG(); \
1247 } \
1248} while (0)
1249
1250#else
1251
1252#define ASSERT(X) \
1253do { \
1254} while (0)
1255
1256#define ASSERTCMP(X, OP, Y) \
1257do { \
1258} while (0)
1259
1260#define ASSERTIF(C, X) \
1261do { \
1262} while (0)
1263
1264#define ASSERTIFCMP(C, X, OP, Y) \
1265do { \
1266} while (0)
1267
1268#endif
1269