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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
79 struct list_head conn_proc_list;
80 struct list_head service_conns;
81 rwlock_t conn_lock;
82 struct work_struct service_conn_reaper;
83 struct timer_list service_conn_reap_timer;
84
85 unsigned int nr_client_conns;
86 unsigned int nr_active_client_conns;
87 bool kill_all_client_conns;
88 bool live;
89 spinlock_t client_conn_cache_lock;
90 spinlock_t client_conn_discard_lock;
91 struct list_head waiting_client_conns;
92 struct list_head active_client_conns;
93 struct list_head idle_client_conns;
94 struct work_struct client_conn_reaper;
95 struct timer_list client_conn_reap_timer;
96
97 struct list_head local_endpoints;
98 struct mutex local_mutex;
99
100 spinlock_t peer_hash_lock;
101 DECLARE_HASHTABLE (peer_hash, 10);
102};
103
104
105
106
107
108
109
110
111
112struct rxrpc_backlog {
113 unsigned short peer_backlog_head;
114 unsigned short peer_backlog_tail;
115 unsigned short conn_backlog_head;
116 unsigned short conn_backlog_tail;
117 unsigned short call_backlog_head;
118 unsigned short call_backlog_tail;
119#define RXRPC_BACKLOG_MAX 32
120 struct rxrpc_peer *peer_backlog[RXRPC_BACKLOG_MAX];
121 struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
122 struct rxrpc_call *call_backlog[RXRPC_BACKLOG_MAX];
123};
124
125
126
127
128struct rxrpc_sock {
129
130 struct sock sk;
131 rxrpc_notify_new_call_t notify_new_call;
132 rxrpc_discard_new_call_t discard_new_call;
133 struct rxrpc_local *local;
134 struct rxrpc_backlog *backlog;
135 spinlock_t incoming_lock;
136 struct list_head sock_calls;
137 struct list_head to_be_accepted;
138 struct list_head recvmsg_q;
139 rwlock_t recvmsg_lock;
140 struct key *key;
141 struct key *securities;
142 struct rb_root calls;
143 unsigned long flags;
144#define RXRPC_SOCK_CONNECTED 0
145 rwlock_t call_lock;
146 u32 min_sec_level;
147#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
148 bool exclusive;
149 u16 second_service;
150 struct {
151
152 u16 from;
153 u16 to;
154 } service_upgrade;
155 sa_family_t family;
156 struct sockaddr_rxrpc srx;
157 struct sockaddr_rxrpc connect_srx;
158};
159
160#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
161
162
163
164
165struct rxrpc_host_header {
166 u32 epoch;
167 u32 cid;
168 u32 callNumber;
169 u32 seq;
170 u32 serial;
171 u8 type;
172 u8 flags;
173 u8 userStatus;
174 u8 securityIndex;
175 union {
176 u16 _rsvd;
177 u16 cksum;
178 };
179 u16 serviceId;
180} __packed;
181
182
183
184
185
186struct rxrpc_skb_priv {
187 union {
188 u8 nr_jumbo;
189 };
190 union {
191 int remain;
192 };
193
194 struct rxrpc_host_header hdr;
195};
196
197#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
198
199
200
201
202struct rxrpc_security {
203 const char *name;
204 u8 security_index;
205
206
207 int (*init)(void);
208
209
210 void (*exit)(void);
211
212
213 int (*init_connection_security)(struct rxrpc_connection *);
214
215
216 int (*prime_packet_security)(struct rxrpc_connection *);
217
218
219 int (*secure_packet)(struct rxrpc_call *,
220 struct sk_buff *,
221 size_t,
222 void *);
223
224
225 int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
226 unsigned int, unsigned int, rxrpc_seq_t, u16);
227
228
229 void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
230 unsigned int *, unsigned int *);
231
232
233 int (*issue_challenge)(struct rxrpc_connection *);
234
235
236 int (*respond_to_challenge)(struct rxrpc_connection *,
237 struct sk_buff *,
238 u32 *);
239
240
241 int (*verify_response)(struct rxrpc_connection *,
242 struct sk_buff *,
243 u32 *);
244
245
246 void (*clear)(struct rxrpc_connection *);
247};
248
249
250
251
252
253
254struct rxrpc_local {
255 struct rcu_head rcu;
256 atomic_t usage;
257 struct rxrpc_net *rxnet;
258 struct list_head link;
259 struct socket *socket;
260 struct work_struct processor;
261 struct rxrpc_sock __rcu *service;
262 struct rw_semaphore defrag_sem;
263 struct sk_buff_head reject_queue;
264 struct sk_buff_head event_queue;
265 struct rb_root client_conns;
266 spinlock_t client_conns_lock;
267 spinlock_t lock;
268 rwlock_t services_lock;
269 int debug_id;
270 bool dead;
271 bool service_closed;
272 struct sockaddr_rxrpc srx;
273};
274
275
276
277
278
279struct rxrpc_peer {
280 struct rcu_head rcu;
281 atomic_t usage;
282 unsigned long hash_key;
283 struct hlist_node hash_link;
284 struct rxrpc_local *local;
285 struct hlist_head error_targets;
286 struct work_struct error_distributor;
287 struct rb_root service_conns;
288 seqlock_t service_conn_lock;
289 spinlock_t lock;
290 unsigned int if_mtu;
291 unsigned int mtu;
292 unsigned int maxdata;
293 unsigned short hdrsize;
294 int debug_id;
295 int error_report;
296#define RXRPC_LOCAL_ERROR_OFFSET 1000000
297 struct sockaddr_rxrpc srx;
298
299
300#define RXRPC_RTT_CACHE_SIZE 32
301 ktime_t rtt_last_req;
302 u64 rtt;
303 u64 rtt_sum;
304 u64 rtt_cache[RXRPC_RTT_CACHE_SIZE];
305 u8 rtt_cursor;
306 u8 rtt_usage;
307
308 u8 cong_cwnd;
309};
310
311
312
313
314struct rxrpc_conn_proto {
315 union {
316 struct {
317 u32 epoch;
318 u32 cid;
319 };
320 u64 index_key;
321 };
322};
323
324struct rxrpc_conn_parameters {
325 struct rxrpc_local *local;
326 struct rxrpc_peer *peer;
327 struct key *key;
328 bool exclusive;
329 bool upgrade;
330 u16 service_id;
331 u32 security_level;
332};
333
334
335
336
337enum rxrpc_conn_flag {
338 RXRPC_CONN_HAS_IDR,
339 RXRPC_CONN_IN_SERVICE_CONNS,
340 RXRPC_CONN_IN_CLIENT_CONNS,
341 RXRPC_CONN_EXPOSED,
342 RXRPC_CONN_DONT_REUSE,
343 RXRPC_CONN_COUNTED,
344 RXRPC_CONN_PROBING_FOR_UPGRADE,
345 RXRPC_CONN_FINAL_ACK_0,
346 RXRPC_CONN_FINAL_ACK_1,
347 RXRPC_CONN_FINAL_ACK_2,
348 RXRPC_CONN_FINAL_ACK_3,
349};
350
351#define RXRPC_CONN_FINAL_ACK_MASK ((1UL << RXRPC_CONN_FINAL_ACK_0) | \
352 (1UL << RXRPC_CONN_FINAL_ACK_1) | \
353 (1UL << RXRPC_CONN_FINAL_ACK_2) | \
354 (1UL << RXRPC_CONN_FINAL_ACK_3))
355
356
357
358
359enum rxrpc_conn_event {
360 RXRPC_CONN_EV_CHALLENGE,
361};
362
363
364
365
366enum rxrpc_conn_cache_state {
367 RXRPC_CONN_CLIENT_INACTIVE,
368 RXRPC_CONN_CLIENT_WAITING,
369 RXRPC_CONN_CLIENT_ACTIVE,
370 RXRPC_CONN_CLIENT_UPGRADE,
371 RXRPC_CONN_CLIENT_CULLED,
372 RXRPC_CONN_CLIENT_IDLE,
373 RXRPC_CONN__NR_CACHE_STATES
374};
375
376
377
378
379enum rxrpc_conn_proto_state {
380 RXRPC_CONN_UNUSED,
381 RXRPC_CONN_CLIENT,
382 RXRPC_CONN_SERVICE_PREALLOC,
383 RXRPC_CONN_SERVICE_UNSECURED,
384 RXRPC_CONN_SERVICE_CHALLENGING,
385 RXRPC_CONN_SERVICE,
386 RXRPC_CONN_REMOTELY_ABORTED,
387 RXRPC_CONN_LOCALLY_ABORTED,
388 RXRPC_CONN__NR_STATES
389};
390
391
392
393
394
395
396struct rxrpc_connection {
397 struct rxrpc_conn_proto proto;
398 struct rxrpc_conn_parameters params;
399
400 atomic_t usage;
401 struct rcu_head rcu;
402 struct list_head cache_link;
403
404 spinlock_t channel_lock;
405 unsigned char active_chans;
406#define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
407 struct list_head waiting_calls;
408 struct rxrpc_channel {
409 unsigned long final_ack_at;
410 struct rxrpc_call __rcu *call;
411 u32 call_id;
412 u32 call_counter;
413 u32 last_call;
414 u8 last_type;
415 union {
416 u32 last_seq;
417 u32 last_abort;
418 };
419 } channels[RXRPC_MAXCALLS];
420
421 struct timer_list timer;
422 struct work_struct processor;
423 union {
424 struct rb_node client_node;
425 struct rb_node service_node;
426 };
427 struct list_head proc_link;
428 struct list_head link;
429 struct sk_buff_head rx_queue;
430 const struct rxrpc_security *security;
431 struct key *server_key;
432 struct crypto_skcipher *cipher;
433 struct rxrpc_crypt csum_iv;
434 unsigned long flags;
435 unsigned long events;
436 unsigned long idle_timestamp;
437 spinlock_t state_lock;
438 enum rxrpc_conn_cache_state cache_state;
439 enum rxrpc_conn_proto_state state;
440 u32 local_abort;
441 u32 remote_abort;
442 int debug_id;
443 atomic_t serial;
444 unsigned int hi_serial;
445 u32 security_nonce;
446 u16 service_id;
447 u8 size_align;
448 u8 security_size;
449 u8 security_ix;
450 u8 out_clientflag;
451};
452
453
454
455
456enum rxrpc_call_flag {
457 RXRPC_CALL_RELEASED,
458 RXRPC_CALL_HAS_USERID,
459 RXRPC_CALL_IS_SERVICE,
460 RXRPC_CALL_EXPOSED,
461 RXRPC_CALL_RX_LAST,
462 RXRPC_CALL_TX_LAST,
463 RXRPC_CALL_TX_LASTQ,
464 RXRPC_CALL_SEND_PING,
465 RXRPC_CALL_PINGING,
466 RXRPC_CALL_RETRANS_TIMEOUT,
467};
468
469
470
471
472enum rxrpc_call_event {
473 RXRPC_CALL_EV_ACK,
474 RXRPC_CALL_EV_ABORT,
475 RXRPC_CALL_EV_RESEND,
476 RXRPC_CALL_EV_PING,
477 RXRPC_CALL_EV_EXPIRED,
478 RXRPC_CALL_EV_ACK_LOST,
479};
480
481
482
483
484enum rxrpc_call_state {
485 RXRPC_CALL_UNINITIALISED,
486 RXRPC_CALL_CLIENT_AWAIT_CONN,
487 RXRPC_CALL_CLIENT_SEND_REQUEST,
488 RXRPC_CALL_CLIENT_AWAIT_REPLY,
489 RXRPC_CALL_CLIENT_RECV_REPLY,
490 RXRPC_CALL_SERVER_PREALLOC,
491 RXRPC_CALL_SERVER_SECURING,
492 RXRPC_CALL_SERVER_ACCEPTING,
493 RXRPC_CALL_SERVER_RECV_REQUEST,
494 RXRPC_CALL_SERVER_ACK_REQUEST,
495 RXRPC_CALL_SERVER_SEND_REPLY,
496 RXRPC_CALL_SERVER_AWAIT_ACK,
497 RXRPC_CALL_COMPLETE,
498 NR__RXRPC_CALL_STATES
499};
500
501
502
503
504enum rxrpc_congest_mode {
505 RXRPC_CALL_SLOW_START,
506 RXRPC_CALL_CONGEST_AVOIDANCE,
507 RXRPC_CALL_PACKET_LOSS,
508 RXRPC_CALL_FAST_RETRANSMIT,
509 NR__RXRPC_CONGEST_MODES
510};
511
512
513
514
515
516struct rxrpc_call {
517 struct rcu_head rcu;
518 struct rxrpc_connection *conn;
519 struct rxrpc_peer *peer;
520 struct rxrpc_sock __rcu *socket;
521 struct mutex user_mutex;
522 unsigned long ack_at;
523 unsigned long ack_lost_at;
524 unsigned long resend_at;
525 unsigned long ping_at;
526 unsigned long keepalive_at;
527 unsigned long expect_rx_by;
528 unsigned long expect_req_by;
529 unsigned long expect_term_by;
530 u32 next_rx_timo;
531 u32 next_req_timo;
532 struct timer_list timer;
533 struct work_struct processor;
534 rxrpc_notify_rx_t notify_rx;
535 struct list_head link;
536 struct list_head chan_wait_link;
537 struct hlist_node error_link;
538 struct list_head accept_link;
539 struct list_head recvmsg_link;
540 struct list_head sock_link;
541 struct rb_node sock_node;
542 struct sk_buff *tx_pending;
543 wait_queue_head_t waitq;
544 s64 tx_total_len;
545 __be32 crypto_buf[2];
546 unsigned long user_call_ID;
547 unsigned long flags;
548 unsigned long events;
549 spinlock_t lock;
550 spinlock_t notify_lock;
551 rwlock_t state_lock;
552 u32 abort_code;
553 int error;
554 enum rxrpc_call_state state;
555 enum rxrpc_call_completion completion;
556 atomic_t usage;
557 u16 service_id;
558 u8 security_ix;
559 u32 call_id;
560 u32 cid;
561 int debug_id;
562 unsigned short rx_pkt_offset;
563 unsigned short rx_pkt_len;
564
565
566
567
568
569
570
571
572
573
574#define RXRPC_RXTX_BUFF_SIZE 64
575#define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1)
576#define RXRPC_INIT_RX_WINDOW_SIZE 32
577 struct sk_buff **rxtx_buffer;
578 u8 *rxtx_annotations;
579#define RXRPC_TX_ANNO_ACK 0
580#define RXRPC_TX_ANNO_UNACK 1
581#define RXRPC_TX_ANNO_NAK 2
582#define RXRPC_TX_ANNO_RETRANS 3
583#define RXRPC_TX_ANNO_MASK 0x03
584#define RXRPC_TX_ANNO_LAST 0x04
585#define RXRPC_TX_ANNO_RESENT 0x08
586
587#define RXRPC_RX_ANNO_JUMBO 0x3f
588#define RXRPC_RX_ANNO_JLAST 0x40
589#define RXRPC_RX_ANNO_VERIFIED 0x80
590 rxrpc_seq_t tx_hard_ack;
591
592
593 rxrpc_seq_t tx_top;
594
595
596
597
598
599#define RXRPC_TX_SMSS RXRPC_JUMBO_DATALEN
600 u8 cong_cwnd;
601 u8 cong_extra;
602 u8 cong_ssthresh;
603 enum rxrpc_congest_mode cong_mode:8;
604 u8 cong_dup_acks;
605 u8 cong_cumul_acks;
606 ktime_t cong_tstamp;
607
608 rxrpc_seq_t rx_hard_ack;
609
610
611 rxrpc_seq_t rx_top;
612 rxrpc_seq_t rx_expect_next;
613 u8 rx_winsize;
614 u8 tx_winsize;
615 bool tx_phase;
616 u8 nr_jumbo_bad;
617
618
619 u8 ackr_reason;
620 u16 ackr_skew;
621 rxrpc_serial_t ackr_serial;
622 rxrpc_seq_t ackr_prev_seq;
623 rxrpc_seq_t ackr_consumed;
624 rxrpc_seq_t ackr_seen;
625
626
627 rxrpc_serial_t ping_serial;
628 ktime_t ping_time;
629
630
631 ktime_t acks_latest_ts;
632 rxrpc_serial_t acks_latest;
633 rxrpc_seq_t acks_lowest_nak;
634 rxrpc_seq_t acks_lost_top;
635 rxrpc_serial_t acks_lost_ping;
636};
637
638
639
640
641struct rxrpc_ack_summary {
642 u8 ack_reason;
643 u8 nr_acks;
644 u8 nr_nacks;
645 u8 nr_new_acks;
646 u8 nr_new_nacks;
647 u8 nr_rot_new_acks;
648 bool new_low_nack;
649 bool retrans_timeo;
650 u8 flight_size;
651
652 enum rxrpc_congest_mode mode:8;
653 u8 cwnd;
654 u8 ssthresh;
655 u8 dup_acks;
656 u8 cumulative_acks;
657};
658
659
660
661
662enum rxrpc_command {
663 RXRPC_CMD_SEND_DATA,
664 RXRPC_CMD_SEND_ABORT,
665 RXRPC_CMD_ACCEPT,
666 RXRPC_CMD_REJECT_BUSY,
667};
668
669struct rxrpc_call_params {
670 s64 tx_total_len;
671 unsigned long user_call_ID;
672 struct {
673 u32 hard;
674 u32 idle;
675 u32 normal;
676 } timeouts;
677 u8 nr_timeouts;
678};
679
680struct rxrpc_send_params {
681 struct rxrpc_call_params call;
682 u32 abort_code;
683 enum rxrpc_command command : 8;
684 bool exclusive;
685 bool upgrade;
686};
687
688#include <trace/events/rxrpc.h>
689
690
691
692
693extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
694extern atomic_t rxrpc_debug_id;
695extern struct workqueue_struct *rxrpc_workqueue;
696
697
698
699
700int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
701void rxrpc_discard_prealloc(struct rxrpc_sock *);
702struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
703 struct rxrpc_connection *,
704 struct sk_buff *);
705void rxrpc_accept_incoming_calls(struct rxrpc_local *);
706struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
707 rxrpc_notify_rx_t);
708int rxrpc_reject_call(struct rxrpc_sock *);
709
710
711
712
713void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool,
714 enum rxrpc_propose_ack_trace);
715void rxrpc_process_call(struct work_struct *);
716
717static inline void rxrpc_reduce_call_timer(struct rxrpc_call *call,
718 unsigned long expire_at,
719 unsigned long now,
720 enum rxrpc_timer_trace why)
721{
722 trace_rxrpc_timer(call, why, now);
723 timer_reduce(&call->timer, expire_at);
724}
725
726
727
728
729extern const char *const rxrpc_call_states[];
730extern const char *const rxrpc_call_completions[];
731extern unsigned int rxrpc_max_call_lifetime;
732extern struct kmem_cache *rxrpc_call_jar;
733
734struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
735struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t);
736struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
737 struct rxrpc_conn_parameters *,
738 struct sockaddr_rxrpc *,
739 struct rxrpc_call_params *, gfp_t);
740int rxrpc_retry_client_call(struct rxrpc_sock *,
741 struct rxrpc_call *,
742 struct rxrpc_conn_parameters *,
743 struct sockaddr_rxrpc *,
744 gfp_t);
745void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
746 struct sk_buff *);
747void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
748int rxrpc_prepare_call_for_retry(struct rxrpc_sock *, struct rxrpc_call *);
749void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
750bool __rxrpc_queue_call(struct rxrpc_call *);
751bool rxrpc_queue_call(struct rxrpc_call *);
752void rxrpc_see_call(struct rxrpc_call *);
753void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
754void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
755void rxrpc_cleanup_call(struct rxrpc_call *);
756void rxrpc_destroy_all_calls(struct rxrpc_net *);
757
758static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
759{
760 return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
761}
762
763static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
764{
765 return !rxrpc_is_service_call(call);
766}
767
768
769
770
771static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
772 enum rxrpc_call_completion compl,
773 u32 abort_code,
774 int error)
775{
776 if (call->state < RXRPC_CALL_COMPLETE) {
777 call->abort_code = abort_code;
778 call->error = error;
779 call->completion = compl,
780 call->state = RXRPC_CALL_COMPLETE;
781 wake_up(&call->waitq);
782 return true;
783 }
784 return false;
785}
786
787static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
788 enum rxrpc_call_completion compl,
789 u32 abort_code,
790 int error)
791{
792 bool ret;
793
794 write_lock_bh(&call->state_lock);
795 ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
796 write_unlock_bh(&call->state_lock);
797 return ret;
798}
799
800
801
802
803static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
804{
805 return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
806}
807
808static inline bool rxrpc_call_completed(struct rxrpc_call *call)
809{
810 bool ret;
811
812 write_lock_bh(&call->state_lock);
813 ret = __rxrpc_call_completed(call);
814 write_unlock_bh(&call->state_lock);
815 return ret;
816}
817
818
819
820
821static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
822 rxrpc_seq_t seq,
823 u32 abort_code, int error)
824{
825 trace_rxrpc_abort(why, call->cid, call->call_id, seq,
826 abort_code, error);
827 return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
828 abort_code, error);
829}
830
831static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
832 rxrpc_seq_t seq, u32 abort_code, int error)
833{
834 bool ret;
835
836 write_lock_bh(&call->state_lock);
837 ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
838 write_unlock_bh(&call->state_lock);
839 return ret;
840}
841
842
843
844
845static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
846 struct sk_buff *skb,
847 const char *eproto_why,
848 const char *why,
849 u32 abort_code)
850{
851 struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
852
853 trace_rxrpc_rx_eproto(call, sp->hdr.serial, eproto_why);
854 return rxrpc_abort_call(why, call, sp->hdr.seq, abort_code, -EPROTO);
855}
856
857#define rxrpc_abort_eproto(call, skb, eproto_why, abort_why, abort_code) \
858 __rxrpc_abort_eproto((call), (skb), tracepoint_string(eproto_why), \
859 (abort_why), (abort_code))
860
861
862
863
864extern unsigned int rxrpc_max_client_connections;
865extern unsigned int rxrpc_reap_client_connections;
866extern unsigned long rxrpc_conn_idle_client_expiry;
867extern unsigned long rxrpc_conn_idle_client_fast_expiry;
868extern struct idr rxrpc_client_conn_ids;
869
870void rxrpc_destroy_client_conn_ids(void);
871int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
872 struct sockaddr_rxrpc *, gfp_t);
873void rxrpc_expose_client_call(struct rxrpc_call *);
874void rxrpc_disconnect_client_call(struct rxrpc_call *);
875void rxrpc_put_client_conn(struct rxrpc_connection *);
876void rxrpc_discard_expired_client_conns(struct work_struct *);
877void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
878
879
880
881
882void rxrpc_process_connection(struct work_struct *);
883
884
885
886
887extern unsigned int rxrpc_connection_expiry;
888extern unsigned int rxrpc_closed_conn_expiry;
889
890struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
891struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
892 struct sk_buff *);
893void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
894void rxrpc_disconnect_call(struct rxrpc_call *);
895void rxrpc_kill_connection(struct rxrpc_connection *);
896bool rxrpc_queue_conn(struct rxrpc_connection *);
897void rxrpc_see_connection(struct rxrpc_connection *);
898void rxrpc_get_connection(struct rxrpc_connection *);
899struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
900void rxrpc_put_service_conn(struct rxrpc_connection *);
901void rxrpc_service_connection_reaper(struct work_struct *);
902void rxrpc_destroy_all_connections(struct rxrpc_net *);
903
904static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
905{
906 return conn->out_clientflag;
907}
908
909static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
910{
911 return !rxrpc_conn_is_client(conn);
912}
913
914static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
915{
916 if (!conn)
917 return;
918
919 if (rxrpc_conn_is_client(conn))
920 rxrpc_put_client_conn(conn);
921 else
922 rxrpc_put_service_conn(conn);
923}
924
925static inline void rxrpc_reduce_conn_timer(struct rxrpc_connection *conn,
926 unsigned long expire_at)
927{
928 timer_reduce(&conn->timer, expire_at);
929}
930
931
932
933
934struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
935 struct sk_buff *);
936struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
937void rxrpc_new_incoming_connection(struct rxrpc_sock *,
938 struct rxrpc_connection *, struct sk_buff *);
939void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
940
941
942
943
944void rxrpc_data_ready(struct sock *);
945
946
947
948
949extern const struct rxrpc_security rxrpc_no_security;
950
951
952
953
954extern struct key_type key_type_rxrpc;
955extern struct key_type key_type_rxrpc_s;
956
957int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
958int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
959int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time64_t,
960 u32);
961
962
963
964
965extern void rxrpc_process_local_events(struct rxrpc_local *);
966
967
968
969
970struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
971void __rxrpc_put_local(struct rxrpc_local *);
972void rxrpc_destroy_all_locals(struct rxrpc_net *);
973
974static inline void rxrpc_get_local(struct rxrpc_local *local)
975{
976 atomic_inc(&local->usage);
977}
978
979static inline
980struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
981{
982 return atomic_inc_not_zero(&local->usage) ? local : NULL;
983}
984
985static inline void rxrpc_put_local(struct rxrpc_local *local)
986{
987 if (local && atomic_dec_and_test(&local->usage))
988 __rxrpc_put_local(local);
989}
990
991static inline void rxrpc_queue_local(struct rxrpc_local *local)
992{
993 rxrpc_queue_work(&local->processor);
994}
995
996
997
998
999extern unsigned int rxrpc_max_backlog __read_mostly;
1000extern unsigned long rxrpc_requested_ack_delay;
1001extern unsigned long rxrpc_soft_ack_delay;
1002extern unsigned long rxrpc_idle_ack_delay;
1003extern unsigned int rxrpc_rx_window_size;
1004extern unsigned int rxrpc_rx_mtu;
1005extern unsigned int rxrpc_rx_jumbo_max;
1006extern unsigned long rxrpc_resend_timeout;
1007
1008extern const s8 rxrpc_ack_priority[];
1009
1010
1011
1012
1013extern unsigned int rxrpc_net_id;
1014extern struct pernet_operations rxrpc_net_ops;
1015
1016static inline struct rxrpc_net *rxrpc_net(struct net *net)
1017{
1018 return net_generic(net, rxrpc_net_id);
1019}
1020
1021
1022
1023
1024int rxrpc_send_ack_packet(struct rxrpc_call *, bool, rxrpc_serial_t *);
1025int rxrpc_send_abort_packet(struct rxrpc_call *);
1026int rxrpc_send_data_packet(struct rxrpc_call *, struct sk_buff *, bool);
1027void rxrpc_reject_packets(struct rxrpc_local *);
1028
1029
1030
1031
1032void rxrpc_error_report(struct sock *);
1033void rxrpc_peer_error_distributor(struct work_struct *);
1034void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
1035 rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
1036
1037
1038
1039
1040struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
1041 const struct sockaddr_rxrpc *);
1042struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
1043 struct sockaddr_rxrpc *, gfp_t);
1044struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
1045struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *,
1046 struct rxrpc_peer *);
1047
1048static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer)
1049{
1050 atomic_inc(&peer->usage);
1051 return peer;
1052}
1053
1054static inline
1055struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
1056{
1057 return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
1058}
1059
1060extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
1061static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
1062{
1063 if (peer && atomic_dec_and_test(&peer->usage))
1064 __rxrpc_put_peer(peer);
1065}
1066
1067
1068
1069
1070extern const struct file_operations rxrpc_call_seq_fops;
1071extern const struct file_operations rxrpc_connection_seq_fops;
1072
1073
1074
1075
1076void rxrpc_notify_socket(struct rxrpc_call *);
1077int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
1078
1079
1080
1081
1082#ifdef CONFIG_RXKAD
1083extern const struct rxrpc_security rxkad;
1084#endif
1085
1086
1087
1088
1089int __init rxrpc_init_security(void);
1090void rxrpc_exit_security(void);
1091int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1092int rxrpc_init_server_conn_security(struct rxrpc_connection *);
1093
1094
1095
1096
1097int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1098
1099
1100
1101
1102void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1103void rxrpc_packet_destructor(struct sk_buff *);
1104void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1105void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1106void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1107void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1108void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
1109void rxrpc_purge_queue(struct sk_buff_head *);
1110
1111
1112
1113
1114#ifdef CONFIG_SYSCTL
1115extern int __init rxrpc_sysctl_init(void);
1116extern void rxrpc_sysctl_exit(void);
1117#else
1118static inline int __init rxrpc_sysctl_init(void) { return 0; }
1119static inline void rxrpc_sysctl_exit(void) {}
1120#endif
1121
1122
1123
1124
1125int rxrpc_extract_addr_from_skb(struct rxrpc_local *, struct sockaddr_rxrpc *,
1126 struct sk_buff *);
1127
1128static inline bool before(u32 seq1, u32 seq2)
1129{
1130 return (s32)(seq1 - seq2) < 0;
1131}
1132static inline bool before_eq(u32 seq1, u32 seq2)
1133{
1134 return (s32)(seq1 - seq2) <= 0;
1135}
1136static inline bool after(u32 seq1, u32 seq2)
1137{
1138 return (s32)(seq1 - seq2) > 0;
1139}
1140static inline bool after_eq(u32 seq1, u32 seq2)
1141{
1142 return (s32)(seq1 - seq2) >= 0;
1143}
1144
1145
1146
1147
1148extern unsigned int rxrpc_debug;
1149
1150#define dbgprintk(FMT,...) \
1151 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1152
1153#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1154#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1155#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1156#define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1157#define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1158
1159
1160#if defined(__KDEBUG)
1161#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1162#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1163#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1164#define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1165#define _net(FMT,...) knet(FMT,##__VA_ARGS__)
1166
1167#elif defined(CONFIG_AF_RXRPC_DEBUG)
1168#define RXRPC_DEBUG_KENTER 0x01
1169#define RXRPC_DEBUG_KLEAVE 0x02
1170#define RXRPC_DEBUG_KDEBUG 0x04
1171#define RXRPC_DEBUG_KPROTO 0x08
1172#define RXRPC_DEBUG_KNET 0x10
1173
1174#define _enter(FMT,...) \
1175do { \
1176 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1177 kenter(FMT,##__VA_ARGS__); \
1178} while (0)
1179
1180#define _leave(FMT,...) \
1181do { \
1182 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1183 kleave(FMT,##__VA_ARGS__); \
1184} while (0)
1185
1186#define _debug(FMT,...) \
1187do { \
1188 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1189 kdebug(FMT,##__VA_ARGS__); \
1190} while (0)
1191
1192#define _proto(FMT,...) \
1193do { \
1194 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1195 kproto(FMT,##__VA_ARGS__); \
1196} while (0)
1197
1198#define _net(FMT,...) \
1199do { \
1200 if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \
1201 knet(FMT,##__VA_ARGS__); \
1202} while (0)
1203
1204#else
1205#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1206#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1207#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1208#define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1209#define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__)
1210#endif
1211
1212
1213
1214
1215#if 1
1216
1217#define ASSERT(X) \
1218do { \
1219 if (unlikely(!(X))) { \
1220 pr_err("Assertion failed\n"); \
1221 BUG(); \
1222 } \
1223} while (0)
1224
1225#define ASSERTCMP(X, OP, Y) \
1226do { \
1227 __typeof__(X) _x = (X); \
1228 __typeof__(Y) _y = (__typeof__(X))(Y); \
1229 if (unlikely(!(_x OP _y))) { \
1230 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1231 (unsigned long)_x, (unsigned long)_x, #OP, \
1232 (unsigned long)_y, (unsigned long)_y); \
1233 BUG(); \
1234 } \
1235} while (0)
1236
1237#define ASSERTIF(C, X) \
1238do { \
1239 if (unlikely((C) && !(X))) { \
1240 pr_err("Assertion failed\n"); \
1241 BUG(); \
1242 } \
1243} while (0)
1244
1245#define ASSERTIFCMP(C, X, OP, Y) \
1246do { \
1247 __typeof__(X) _x = (X); \
1248 __typeof__(Y) _y = (__typeof__(X))(Y); \
1249 if (unlikely((C) && !(_x OP _y))) { \
1250 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1251 (unsigned long)_x, (unsigned long)_x, #OP, \
1252 (unsigned long)_y, (unsigned long)_y); \
1253 BUG(); \
1254 } \
1255} while (0)
1256
1257#else
1258
1259#define ASSERT(X) \
1260do { \
1261} while (0)
1262
1263#define ASSERTCMP(X, OP, Y) \
1264do { \
1265} while (0)
1266
1267#define ASSERTIF(C, X) \
1268do { \
1269} while (0)
1270
1271#define ASSERTIFCMP(C, X, OP, Y) \
1272do { \
1273} while (0)
1274
1275#endif
1276