1 /* RxRPC virtual connection handler
3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <linux/net.h>
17 #include <linux/skbuff.h>
18 #include <linux/crypto.h>
20 #include <net/af_rxrpc.h>
21 #include "ar-internal.h"
24 * Time till a connection expires after last use (in seconds).
26 unsigned int rxrpc_connection_expiry
= 10 * 60;
28 static void rxrpc_connection_reaper(struct work_struct
*work
);
30 LIST_HEAD(rxrpc_connections
);
31 DEFINE_RWLOCK(rxrpc_connection_lock
);
32 static DECLARE_DELAYED_WORK(rxrpc_connection_reap
, rxrpc_connection_reaper
);
35 * allocate a new client connection bundle
37 static struct rxrpc_conn_bundle
*rxrpc_alloc_bundle(gfp_t gfp
)
39 struct rxrpc_conn_bundle
*bundle
;
43 bundle
= kzalloc(sizeof(struct rxrpc_conn_bundle
), gfp
);
45 INIT_LIST_HEAD(&bundle
->unused_conns
);
46 INIT_LIST_HEAD(&bundle
->avail_conns
);
47 INIT_LIST_HEAD(&bundle
->busy_conns
);
48 init_waitqueue_head(&bundle
->chanwait
);
49 atomic_set(&bundle
->usage
, 1);
52 _leave(" = %p", bundle
);
57 * compare bundle parameters with what we're looking for
58 * - return -ve, 0 or +ve
61 int rxrpc_cmp_bundle(const struct rxrpc_conn_bundle
*bundle
,
62 struct key
*key
, u16 service_id
)
64 return (bundle
->service_id
- service_id
) ?:
65 ((unsigned long)bundle
->key
- (unsigned long)key
);
69 * get bundle of client connections that a client socket can make use of
71 struct rxrpc_conn_bundle
*rxrpc_get_bundle(struct rxrpc_sock
*rx
,
72 struct rxrpc_transport
*trans
,
77 struct rxrpc_conn_bundle
*bundle
, *candidate
;
78 struct rb_node
*p
, *parent
, **pp
;
80 _enter("%p{%x},%x,%hx,",
81 rx
, key_serial(key
), trans
->debug_id
, service_id
);
83 /* search the extant bundles first for one that matches the specified
85 spin_lock(&trans
->client_lock
);
87 p
= trans
->bundles
.rb_node
;
89 bundle
= rb_entry(p
, struct rxrpc_conn_bundle
, node
);
91 if (rxrpc_cmp_bundle(bundle
, key
, service_id
) < 0)
93 else if (rxrpc_cmp_bundle(bundle
, key
, service_id
) > 0)
96 goto found_extant_bundle
;
99 spin_unlock(&trans
->client_lock
);
101 /* not yet present - create a candidate for a new record and then
103 candidate
= rxrpc_alloc_bundle(gfp
);
105 _leave(" = -ENOMEM");
106 return ERR_PTR(-ENOMEM
);
109 candidate
->key
= key_get(key
);
110 candidate
->service_id
= service_id
;
112 spin_lock(&trans
->client_lock
);
114 pp
= &trans
->bundles
.rb_node
;
118 bundle
= rb_entry(parent
, struct rxrpc_conn_bundle
, node
);
120 if (rxrpc_cmp_bundle(bundle
, key
, service_id
) < 0)
121 pp
= &(*pp
)->rb_left
;
122 else if (rxrpc_cmp_bundle(bundle
, key
, service_id
) > 0)
123 pp
= &(*pp
)->rb_right
;
125 goto found_extant_second
;
128 /* second search also failed; add the new bundle */
132 rb_link_node(&bundle
->node
, parent
, pp
);
133 rb_insert_color(&bundle
->node
, &trans
->bundles
);
134 spin_unlock(&trans
->client_lock
);
135 _net("BUNDLE new on trans %d", trans
->debug_id
);
136 _leave(" = %p [new]", bundle
);
139 /* we found the bundle in the list immediately */
141 atomic_inc(&bundle
->usage
);
142 spin_unlock(&trans
->client_lock
);
143 _net("BUNDLE old on trans %d", trans
->debug_id
);
144 _leave(" = %p [extant %d]", bundle
, atomic_read(&bundle
->usage
));
147 /* we found the bundle on the second time through the list */
149 atomic_inc(&bundle
->usage
);
150 spin_unlock(&trans
->client_lock
);
152 _net("BUNDLE old2 on trans %d", trans
->debug_id
);
153 _leave(" = %p [second %d]", bundle
, atomic_read(&bundle
->usage
));
160 void rxrpc_put_bundle(struct rxrpc_transport
*trans
,
161 struct rxrpc_conn_bundle
*bundle
)
163 _enter("%p,%p{%d}",trans
, bundle
, atomic_read(&bundle
->usage
));
165 if (atomic_dec_and_lock(&bundle
->usage
, &trans
->client_lock
)) {
166 _debug("Destroy bundle");
167 rb_erase(&bundle
->node
, &trans
->bundles
);
168 spin_unlock(&trans
->client_lock
);
169 ASSERT(list_empty(&bundle
->unused_conns
));
170 ASSERT(list_empty(&bundle
->avail_conns
));
171 ASSERT(list_empty(&bundle
->busy_conns
));
172 ASSERTCMP(bundle
->num_conns
, ==, 0);
173 key_put(bundle
->key
);
181 * allocate a new connection
183 static struct rxrpc_connection
*rxrpc_alloc_connection(gfp_t gfp
)
185 struct rxrpc_connection
*conn
;
189 conn
= kzalloc(sizeof(struct rxrpc_connection
), gfp
);
191 INIT_WORK(&conn
->processor
, &rxrpc_process_connection
);
192 INIT_LIST_HEAD(&conn
->bundle_link
);
193 conn
->calls
= RB_ROOT
;
194 skb_queue_head_init(&conn
->rx_queue
);
195 conn
->security
= &rxrpc_no_security
;
196 rwlock_init(&conn
->lock
);
197 spin_lock_init(&conn
->state_lock
);
198 atomic_set(&conn
->usage
, 1);
199 conn
->debug_id
= atomic_inc_return(&rxrpc_debug_id
);
200 conn
->avail_calls
= RXRPC_MAXCALLS
;
201 conn
->size_align
= 4;
202 conn
->header_size
= sizeof(struct rxrpc_wire_header
);
205 _leave(" = %p{%d}", conn
, conn
? conn
->debug_id
: 0);
210 * assign a connection ID to a connection and add it to the transport's
211 * connection lookup tree
212 * - called with transport client lock held
214 static void rxrpc_assign_connection_id(struct rxrpc_connection
*conn
)
216 struct rxrpc_connection
*xconn
;
217 struct rb_node
*parent
, **p
;
225 write_lock_bh(&conn
->trans
->conn_lock
);
227 conn
->trans
->conn_idcounter
+= RXRPC_CID_INC
;
228 if (conn
->trans
->conn_idcounter
< RXRPC_CID_INC
)
229 conn
->trans
->conn_idcounter
= RXRPC_CID_INC
;
230 cid
= conn
->trans
->conn_idcounter
;
234 p
= &conn
->trans
->client_conns
.rb_node
;
238 xconn
= rb_entry(parent
, struct rxrpc_connection
, node
);
240 if (epoch
< xconn
->epoch
)
242 else if (epoch
> xconn
->epoch
)
244 else if (cid
< xconn
->cid
)
246 else if (cid
> xconn
->cid
)
252 /* we've found a suitable hole - arrange for this connection to occupy
254 rb_link_node(&conn
->node
, parent
, p
);
255 rb_insert_color(&conn
->node
, &conn
->trans
->client_conns
);
258 write_unlock_bh(&conn
->trans
->conn_lock
);
259 _leave(" [CID %x]", cid
);
262 /* we found a connection with the proposed ID - walk the tree from that
263 * point looking for the next unused ID */
266 cid
+= RXRPC_CID_INC
;
267 if (cid
< RXRPC_CID_INC
) {
269 conn
->trans
->conn_idcounter
= cid
;
270 goto attempt_insertion
;
273 parent
= rb_next(parent
);
275 goto attempt_insertion
;
277 xconn
= rb_entry(parent
, struct rxrpc_connection
, node
);
278 if (epoch
< xconn
->epoch
||
280 goto attempt_insertion
;
285 * add a call to a connection's call-by-ID tree
287 static void rxrpc_add_call_ID_to_conn(struct rxrpc_connection
*conn
,
288 struct rxrpc_call
*call
)
290 struct rxrpc_call
*xcall
;
291 struct rb_node
*parent
, **p
;
294 write_lock_bh(&conn
->lock
);
296 call_id
= call
->call_id
;
297 p
= &conn
->calls
.rb_node
;
301 xcall
= rb_entry(parent
, struct rxrpc_call
, conn_node
);
303 if (call_id
< xcall
->call_id
)
305 else if (call_id
> xcall
->call_id
)
311 rb_link_node(&call
->conn_node
, parent
, p
);
312 rb_insert_color(&call
->conn_node
, &conn
->calls
);
314 write_unlock_bh(&conn
->lock
);
318 * connect a call on an exclusive connection
320 static int rxrpc_connect_exclusive(struct rxrpc_sock
*rx
,
321 struct rxrpc_transport
*trans
,
323 struct rxrpc_call
*call
,
326 struct rxrpc_connection
*conn
;
333 /* not yet present - create a candidate for a new connection
334 * and then redo the check */
335 conn
= rxrpc_alloc_connection(gfp
);
337 _leave(" = -ENOMEM");
343 conn
->service_id
= service_id
;
344 conn
->epoch
= rxrpc_epoch
;
345 conn
->in_clientflag
= 0;
346 conn
->out_clientflag
= RXRPC_CLIENT_INITIATED
;
348 conn
->state
= RXRPC_CONN_CLIENT
;
349 conn
->avail_calls
= RXRPC_MAXCALLS
- 1;
350 conn
->security_level
= rx
->min_sec_level
;
351 conn
->key
= key_get(rx
->key
);
353 ret
= rxrpc_init_client_conn_security(conn
);
357 _leave(" = %d [key]", ret
);
361 write_lock_bh(&rxrpc_connection_lock
);
362 list_add_tail(&conn
->link
, &rxrpc_connections
);
363 write_unlock_bh(&rxrpc_connection_lock
);
365 spin_lock(&trans
->client_lock
);
366 atomic_inc(&trans
->usage
);
368 _net("CONNECT EXCL new %d on TRANS %d",
369 conn
->debug_id
, conn
->trans
->debug_id
);
371 rxrpc_assign_connection_id(conn
);
374 spin_lock(&trans
->client_lock
);
377 /* we've got a connection with a free channel and we can now attach the
379 * - we're holding the transport's client lock
380 * - we're holding a reference on the connection
382 for (chan
= 0; chan
< RXRPC_MAXCALLS
; chan
++)
383 if (!conn
->channels
[chan
])
385 goto no_free_channels
;
388 atomic_inc(&conn
->usage
);
389 conn
->channels
[chan
] = call
;
391 call
->channel
= chan
;
392 call
->cid
= conn
->cid
| chan
;
393 call
->call_id
= ++conn
->call_counter
;
395 _net("CONNECT client on conn %d chan %d as call %x",
396 conn
->debug_id
, chan
, call
->call_id
);
398 spin_unlock(&trans
->client_lock
);
400 rxrpc_add_call_ID_to_conn(conn
, call
);
405 spin_unlock(&trans
->client_lock
);
411 * find a connection for a call
412 * - called in process context with IRQs enabled
414 int rxrpc_connect_call(struct rxrpc_sock
*rx
,
415 struct rxrpc_transport
*trans
,
416 struct rxrpc_conn_bundle
*bundle
,
417 struct rxrpc_call
*call
,
420 struct rxrpc_connection
*conn
, *candidate
;
423 DECLARE_WAITQUEUE(myself
, current
);
425 _enter("%p,%lx,", rx
, call
->user_call_ID
);
427 if (test_bit(RXRPC_SOCK_EXCLUSIVE_CONN
, &rx
->flags
))
428 return rxrpc_connect_exclusive(rx
, trans
, bundle
->service_id
,
431 spin_lock(&trans
->client_lock
);
433 /* see if the bundle has a call slot available */
434 if (!list_empty(&bundle
->avail_conns
)) {
436 conn
= list_entry(bundle
->avail_conns
.next
,
437 struct rxrpc_connection
,
439 if (conn
->state
>= RXRPC_CONN_REMOTELY_ABORTED
) {
440 list_del_init(&conn
->bundle_link
);
444 if (--conn
->avail_calls
== 0)
445 list_move(&conn
->bundle_link
,
446 &bundle
->busy_conns
);
447 ASSERTCMP(conn
->avail_calls
, <, RXRPC_MAXCALLS
);
448 ASSERT(conn
->channels
[0] == NULL
||
449 conn
->channels
[1] == NULL
||
450 conn
->channels
[2] == NULL
||
451 conn
->channels
[3] == NULL
);
452 atomic_inc(&conn
->usage
);
456 if (!list_empty(&bundle
->unused_conns
)) {
458 conn
= list_entry(bundle
->unused_conns
.next
,
459 struct rxrpc_connection
,
461 if (conn
->state
>= RXRPC_CONN_REMOTELY_ABORTED
) {
462 list_del_init(&conn
->bundle_link
);
466 ASSERTCMP(conn
->avail_calls
, ==, RXRPC_MAXCALLS
);
467 conn
->avail_calls
= RXRPC_MAXCALLS
- 1;
468 ASSERT(conn
->channels
[0] == NULL
&&
469 conn
->channels
[1] == NULL
&&
470 conn
->channels
[2] == NULL
&&
471 conn
->channels
[3] == NULL
);
472 atomic_inc(&conn
->usage
);
473 list_move(&conn
->bundle_link
, &bundle
->avail_conns
);
477 /* need to allocate a new connection */
478 _debug("get new conn [%d]", bundle
->num_conns
);
480 spin_unlock(&trans
->client_lock
);
482 if (signal_pending(current
))
485 if (bundle
->num_conns
>= 20) {
486 _debug("too many conns");
488 if (!gfpflags_allow_blocking(gfp
)) {
489 _leave(" = -EAGAIN");
493 add_wait_queue(&bundle
->chanwait
, &myself
);
495 set_current_state(TASK_INTERRUPTIBLE
);
496 if (bundle
->num_conns
< 20 ||
497 !list_empty(&bundle
->unused_conns
) ||
498 !list_empty(&bundle
->avail_conns
))
500 if (signal_pending(current
))
501 goto interrupted_dequeue
;
504 remove_wait_queue(&bundle
->chanwait
, &myself
);
505 __set_current_state(TASK_RUNNING
);
506 spin_lock(&trans
->client_lock
);
510 /* not yet present - create a candidate for a new connection and then
512 candidate
= rxrpc_alloc_connection(gfp
);
514 _leave(" = -ENOMEM");
518 candidate
->trans
= trans
;
519 candidate
->bundle
= bundle
;
520 candidate
->service_id
= bundle
->service_id
;
521 candidate
->epoch
= rxrpc_epoch
;
522 candidate
->in_clientflag
= 0;
523 candidate
->out_clientflag
= RXRPC_CLIENT_INITIATED
;
525 candidate
->state
= RXRPC_CONN_CLIENT
;
526 candidate
->avail_calls
= RXRPC_MAXCALLS
;
527 candidate
->security_level
= rx
->min_sec_level
;
528 candidate
->key
= key_get(bundle
->key
);
530 ret
= rxrpc_init_client_conn_security(candidate
);
532 key_put(candidate
->key
);
534 _leave(" = %d [key]", ret
);
538 write_lock_bh(&rxrpc_connection_lock
);
539 list_add_tail(&candidate
->link
, &rxrpc_connections
);
540 write_unlock_bh(&rxrpc_connection_lock
);
542 spin_lock(&trans
->client_lock
);
544 list_add(&candidate
->bundle_link
, &bundle
->unused_conns
);
546 atomic_inc(&bundle
->usage
);
547 atomic_inc(&trans
->usage
);
549 _net("CONNECT new %d on TRANS %d",
550 candidate
->debug_id
, candidate
->trans
->debug_id
);
552 rxrpc_assign_connection_id(candidate
);
553 candidate
->security
->prime_packet_security(candidate
);
555 /* leave the candidate lurking in zombie mode attached to the
556 * bundle until we're ready for it */
557 rxrpc_put_connection(candidate
);
561 /* we've got a connection with a free channel and we can now attach the
563 * - we're holding the transport's client lock
564 * - we're holding a reference on the connection
565 * - we're holding a reference on the bundle
567 for (chan
= 0; chan
< RXRPC_MAXCALLS
; chan
++)
568 if (!conn
->channels
[chan
])
570 ASSERT(conn
->channels
[0] == NULL
||
571 conn
->channels
[1] == NULL
||
572 conn
->channels
[2] == NULL
||
573 conn
->channels
[3] == NULL
);
577 conn
->channels
[chan
] = call
;
579 call
->channel
= chan
;
580 call
->cid
= conn
->cid
| chan
;
581 call
->call_id
= ++conn
->call_counter
;
583 _net("CONNECT client on conn %d chan %d as call %x",
584 conn
->debug_id
, chan
, call
->call_id
);
586 ASSERTCMP(conn
->avail_calls
, <, RXRPC_MAXCALLS
);
587 spin_unlock(&trans
->client_lock
);
589 rxrpc_add_call_ID_to_conn(conn
, call
);
595 remove_wait_queue(&bundle
->chanwait
, &myself
);
596 __set_current_state(TASK_RUNNING
);
598 _leave(" = -ERESTARTSYS");
603 * get a record of an incoming connection
605 struct rxrpc_connection
*
606 rxrpc_incoming_connection(struct rxrpc_transport
*trans
,
607 struct rxrpc_host_header
*hdr
)
609 struct rxrpc_connection
*conn
, *candidate
= NULL
;
610 struct rb_node
*p
, **pp
;
611 const char *new = "old";
617 ASSERT(hdr
->flags
& RXRPC_CLIENT_INITIATED
);
620 cid
= hdr
->cid
& RXRPC_CIDMASK
;
622 /* search the connection list first */
623 read_lock_bh(&trans
->conn_lock
);
625 p
= trans
->server_conns
.rb_node
;
627 conn
= rb_entry(p
, struct rxrpc_connection
, node
);
629 _debug("maybe %x", conn
->cid
);
631 if (epoch
< conn
->epoch
)
633 else if (epoch
> conn
->epoch
)
635 else if (cid
< conn
->cid
)
637 else if (cid
> conn
->cid
)
640 goto found_extant_connection
;
642 read_unlock_bh(&trans
->conn_lock
);
644 /* not yet present - create a candidate for a new record and then
646 candidate
= rxrpc_alloc_connection(GFP_NOIO
);
648 _leave(" = -ENOMEM");
649 return ERR_PTR(-ENOMEM
);
652 candidate
->trans
= trans
;
653 candidate
->epoch
= hdr
->epoch
;
654 candidate
->cid
= hdr
->cid
& RXRPC_CIDMASK
;
655 candidate
->service_id
= hdr
->serviceId
;
656 candidate
->security_ix
= hdr
->securityIndex
;
657 candidate
->in_clientflag
= RXRPC_CLIENT_INITIATED
;
658 candidate
->out_clientflag
= 0;
659 candidate
->state
= RXRPC_CONN_SERVER
;
660 if (candidate
->service_id
)
661 candidate
->state
= RXRPC_CONN_SERVER_UNSECURED
;
663 write_lock_bh(&trans
->conn_lock
);
665 pp
= &trans
->server_conns
.rb_node
;
669 conn
= rb_entry(p
, struct rxrpc_connection
, node
);
671 if (epoch
< conn
->epoch
)
672 pp
= &(*pp
)->rb_left
;
673 else if (epoch
> conn
->epoch
)
674 pp
= &(*pp
)->rb_right
;
675 else if (cid
< conn
->cid
)
676 pp
= &(*pp
)->rb_left
;
677 else if (cid
> conn
->cid
)
678 pp
= &(*pp
)->rb_right
;
680 goto found_extant_second
;
683 /* we can now add the new candidate to the list */
686 rb_link_node(&conn
->node
, p
, pp
);
687 rb_insert_color(&conn
->node
, &trans
->server_conns
);
688 atomic_inc(&conn
->trans
->usage
);
690 write_unlock_bh(&trans
->conn_lock
);
692 write_lock_bh(&rxrpc_connection_lock
);
693 list_add_tail(&conn
->link
, &rxrpc_connections
);
694 write_unlock_bh(&rxrpc_connection_lock
);
699 _net("CONNECTION %s %d {%x}", new, conn
->debug_id
, conn
->cid
);
701 _leave(" = %p {u=%d}", conn
, atomic_read(&conn
->usage
));
704 /* we found the connection in the list immediately */
705 found_extant_connection
:
706 if (hdr
->securityIndex
!= conn
->security_ix
) {
707 read_unlock_bh(&trans
->conn_lock
);
708 goto security_mismatch
;
710 atomic_inc(&conn
->usage
);
711 read_unlock_bh(&trans
->conn_lock
);
714 /* we found the connection on the second time through the list */
716 if (hdr
->securityIndex
!= conn
->security_ix
) {
717 write_unlock_bh(&trans
->conn_lock
);
718 goto security_mismatch
;
720 atomic_inc(&conn
->usage
);
721 write_unlock_bh(&trans
->conn_lock
);
727 _leave(" = -EKEYREJECTED");
728 return ERR_PTR(-EKEYREJECTED
);
732 * find a connection based on transport and RxRPC connection ID for an incoming
735 struct rxrpc_connection
*rxrpc_find_connection(struct rxrpc_transport
*trans
,
736 struct rxrpc_host_header
*hdr
)
738 struct rxrpc_connection
*conn
;
742 _enter(",{%x,%x}", hdr
->cid
, hdr
->flags
);
744 read_lock_bh(&trans
->conn_lock
);
746 cid
= hdr
->cid
& RXRPC_CIDMASK
;
749 if (hdr
->flags
& RXRPC_CLIENT_INITIATED
)
750 p
= trans
->server_conns
.rb_node
;
752 p
= trans
->client_conns
.rb_node
;
755 conn
= rb_entry(p
, struct rxrpc_connection
, node
);
757 _debug("maybe %x", conn
->cid
);
759 if (epoch
< conn
->epoch
)
761 else if (epoch
> conn
->epoch
)
763 else if (cid
< conn
->cid
)
765 else if (cid
> conn
->cid
)
771 read_unlock_bh(&trans
->conn_lock
);
776 atomic_inc(&conn
->usage
);
777 read_unlock_bh(&trans
->conn_lock
);
778 _leave(" = %p", conn
);
783 * release a virtual connection
785 void rxrpc_put_connection(struct rxrpc_connection
*conn
)
787 _enter("%p{u=%d,d=%d}",
788 conn
, atomic_read(&conn
->usage
), conn
->debug_id
);
790 ASSERTCMP(atomic_read(&conn
->usage
), >, 0);
792 conn
->put_time
= ktime_get_seconds();
793 if (atomic_dec_and_test(&conn
->usage
)) {
795 rxrpc_queue_delayed_work(&rxrpc_connection_reap
, 0);
802 * destroy a virtual connection
804 static void rxrpc_destroy_connection(struct rxrpc_connection
*conn
)
806 _enter("%p{%d}", conn
, atomic_read(&conn
->usage
));
808 ASSERTCMP(atomic_read(&conn
->usage
), ==, 0);
810 _net("DESTROY CONN %d", conn
->debug_id
);
813 rxrpc_put_bundle(conn
->trans
, conn
->bundle
);
815 ASSERT(RB_EMPTY_ROOT(&conn
->calls
));
816 rxrpc_purge_queue(&conn
->rx_queue
);
818 conn
->security
->clear(conn
);
820 key_put(conn
->server_key
);
822 rxrpc_put_transport(conn
->trans
);
828 * reap dead connections
830 static void rxrpc_connection_reaper(struct work_struct
*work
)
832 struct rxrpc_connection
*conn
, *_p
;
833 unsigned long now
, earliest
, reap_time
;
835 LIST_HEAD(graveyard
);
839 now
= ktime_get_seconds();
840 earliest
= ULONG_MAX
;
842 write_lock_bh(&rxrpc_connection_lock
);
843 list_for_each_entry_safe(conn
, _p
, &rxrpc_connections
, link
) {
844 _debug("reap CONN %d { u=%d,t=%ld }",
845 conn
->debug_id
, atomic_read(&conn
->usage
),
846 (long) now
- (long) conn
->put_time
);
848 if (likely(atomic_read(&conn
->usage
) > 0))
851 spin_lock(&conn
->trans
->client_lock
);
852 write_lock(&conn
->trans
->conn_lock
);
853 reap_time
= conn
->put_time
+ rxrpc_connection_expiry
;
855 if (atomic_read(&conn
->usage
) > 0) {
857 } else if (reap_time
<= now
) {
858 list_move_tail(&conn
->link
, &graveyard
);
859 if (conn
->out_clientflag
)
860 rb_erase(&conn
->node
,
861 &conn
->trans
->client_conns
);
863 rb_erase(&conn
->node
,
864 &conn
->trans
->server_conns
);
866 list_del_init(&conn
->bundle_link
);
867 conn
->bundle
->num_conns
--;
870 } else if (reap_time
< earliest
) {
871 earliest
= reap_time
;
874 write_unlock(&conn
->trans
->conn_lock
);
875 spin_unlock(&conn
->trans
->client_lock
);
877 write_unlock_bh(&rxrpc_connection_lock
);
879 if (earliest
!= ULONG_MAX
) {
880 _debug("reschedule reaper %ld", (long) earliest
- now
);
881 ASSERTCMP(earliest
, >, now
);
882 rxrpc_queue_delayed_work(&rxrpc_connection_reap
,
883 (earliest
- now
) * HZ
);
886 /* then destroy all those pulled out */
887 while (!list_empty(&graveyard
)) {
888 conn
= list_entry(graveyard
.next
, struct rxrpc_connection
,
890 list_del_init(&conn
->link
);
892 ASSERTCMP(atomic_read(&conn
->usage
), ==, 0);
893 rxrpc_destroy_connection(conn
);
900 * preemptively destroy all the connection records rather than waiting for them
903 void __exit
rxrpc_destroy_all_connections(void)
907 rxrpc_connection_expiry
= 0;
908 cancel_delayed_work(&rxrpc_connection_reap
);
909 rxrpc_queue_delayed_work(&rxrpc_connection_reap
, 0);