Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
45025bce | 2 | /* RxRPC virtual connection handler, common bits. |
17926a79 | 3 | * |
45025bce | 4 | * Copyright (C) 2007, 2016 Red Hat, Inc. All Rights Reserved. |
17926a79 | 5 | * Written by David Howells (dhowells@redhat.com) |
17926a79 DH |
6 | */ |
7 | ||
9b6d5398 JP |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
9 | ||
17926a79 | 10 | #include <linux/module.h> |
5a0e3ad6 | 11 | #include <linux/slab.h> |
17926a79 DH |
12 | #include <linux/net.h> |
13 | #include <linux/skbuff.h> | |
17926a79 DH |
14 | #include "ar-internal.h" |
15 | ||
5873c083 DH |
16 | /* |
17 | * Time till a connection expires after last use (in seconds). | |
18 | */ | |
f859ab61 DH |
19 | unsigned int __read_mostly rxrpc_connection_expiry = 10 * 60; |
20 | unsigned int __read_mostly rxrpc_closed_conn_expiry = 10; | |
5873c083 | 21 | |
3cec055c DH |
22 | static void rxrpc_clean_up_connection(struct work_struct *work); |
23 | static void rxrpc_set_service_reap_timer(struct rxrpc_net *rxnet, | |
24 | unsigned long reap_at); | |
45025bce | 25 | |
f2cce89a DH |
26 | void rxrpc_poke_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why) |
27 | { | |
28 | struct rxrpc_local *local = conn->local; | |
29 | bool busy; | |
30 | ||
31 | if (WARN_ON_ONCE(!local)) | |
32 | return; | |
33 | ||
34 | spin_lock_bh(&local->lock); | |
35 | busy = !list_empty(&conn->attend_link); | |
36 | if (!busy) { | |
37 | rxrpc_get_connection(conn, why); | |
38 | list_add_tail(&conn->attend_link, &local->conn_attend_q); | |
39 | } | |
40 | spin_unlock_bh(&local->lock); | |
41 | rxrpc_wake_up_io_thread(local); | |
42 | } | |
43 | ||
3136ef49 DH |
44 | static void rxrpc_connection_timer(struct timer_list *timer) |
45 | { | |
46 | struct rxrpc_connection *conn = | |
47 | container_of(timer, struct rxrpc_connection, timer); | |
48 | ||
f2cce89a | 49 | rxrpc_poke_conn(conn, rxrpc_conn_get_poke_timer); |
3136ef49 DH |
50 | } |
51 | ||
17926a79 DH |
52 | /* |
53 | * allocate a new connection | |
54 | */ | |
3cec055c DH |
55 | struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *rxnet, |
56 | gfp_t gfp) | |
17926a79 DH |
57 | { |
58 | struct rxrpc_connection *conn; | |
59 | ||
60 | _enter(""); | |
61 | ||
62 | conn = kzalloc(sizeof(struct rxrpc_connection), gfp); | |
63 | if (conn) { | |
45025bce | 64 | INIT_LIST_HEAD(&conn->cache_link); |
3136ef49 | 65 | timer_setup(&conn->timer, &rxrpc_connection_timer, 0); |
3cec055c DH |
66 | INIT_WORK(&conn->processor, rxrpc_process_connection); |
67 | INIT_WORK(&conn->destructor, rxrpc_clean_up_connection); | |
4d028b2c | 68 | INIT_LIST_HEAD(&conn->proc_link); |
999b69f8 | 69 | INIT_LIST_HEAD(&conn->link); |
9d35d880 | 70 | mutex_init(&conn->security_lock); |
49489bb0 | 71 | mutex_init(&conn->tx_data_alloc_lock); |
17926a79 | 72 | skb_queue_head_init(&conn->rx_queue); |
3cec055c | 73 | conn->rxnet = rxnet; |
e0e4d82f | 74 | conn->security = &rxrpc_no_security; |
17926a79 | 75 | spin_lock_init(&conn->state_lock); |
17926a79 | 76 | conn->debug_id = atomic_inc_return(&rxrpc_debug_id); |
f51b4480 | 77 | conn->idle_timestamp = jiffies; |
17926a79 DH |
78 | } |
79 | ||
16c61add | 80 | _leave(" = %p{%d}", conn, conn ? conn->debug_id : 0); |
17926a79 DH |
81 | return conn; |
82 | } | |
83 | ||
17926a79 | 84 | /* |
8496af50 DH |
85 | * Look up a connection in the cache by protocol parameters. |
86 | * | |
87 | * If successful, a pointer to the connection is returned, but no ref is taken. | |
88 | * NULL is returned if there is no match. | |
89 | * | |
0099dc58 DH |
90 | * When searching for a service call, if we find a peer but no connection, we |
91 | * return that through *_peer in case we need to create a new service call. | |
92 | * | |
8496af50 | 93 | * The caller must be holding the RCU read lock. |
17926a79 | 94 | */ |
5e6ef4f1 DH |
95 | struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *local, |
96 | struct sockaddr_rxrpc *srx, | |
97 | struct sk_buff *skb) | |
17926a79 DH |
98 | { |
99 | struct rxrpc_connection *conn; | |
42886ffe | 100 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
1291e9d1 | 101 | struct rxrpc_peer *peer; |
17926a79 | 102 | |
8496af50 | 103 | _enter(",%x", sp->hdr.cid & RXRPC_CIDMASK); |
17926a79 | 104 | |
f06cb291 DH |
105 | /* Look up client connections by connection ID alone as their |
106 | * IDs are unique for this machine. | |
5e6ef4f1 | 107 | */ |
f06cb291 | 108 | conn = idr_find(&local->conn_ids, sp->hdr.cid >> RXRPC_CIDSHIFT); |
5e6ef4f1 DH |
109 | if (!conn || refcount_read(&conn->ref) == 0) { |
110 | _debug("no conn"); | |
111 | goto not_found; | |
112 | } | |
8496af50 | 113 | |
5e6ef4f1 DH |
114 | if (conn->proto.epoch != sp->hdr.epoch || |
115 | conn->local != local) | |
116 | goto not_found; | |
117 | ||
118 | peer = conn->peer; | |
119 | switch (srx->transport.family) { | |
120 | case AF_INET: | |
121 | if (peer->srx.transport.sin.sin_port != | |
8953285d | 122 | srx->transport.sin.sin_port) |
1291e9d1 | 123 | goto not_found; |
5e6ef4f1 | 124 | break; |
d1912747 | 125 | #ifdef CONFIG_AF_RXRPC_IPV6 |
5e6ef4f1 DH |
126 | case AF_INET6: |
127 | if (peer->srx.transport.sin6.sin6_port != | |
8953285d | 128 | srx->transport.sin6.sin6_port) |
5e6ef4f1 DH |
129 | goto not_found; |
130 | break; | |
d1912747 | 131 | #endif |
5e6ef4f1 DH |
132 | default: |
133 | BUG(); | |
17926a79 DH |
134 | } |
135 | ||
5e6ef4f1 DH |
136 | _leave(" = %p", conn); |
137 | return conn; | |
138 | ||
1291e9d1 | 139 | not_found: |
17926a79 DH |
140 | _leave(" = NULL"); |
141 | return NULL; | |
17926a79 DH |
142 | } |
143 | ||
999b69f8 DH |
144 | /* |
145 | * Disconnect a call and clear any channel it occupies when that call | |
a1399f8b DH |
146 | * terminates. The caller must hold the channel_lock and must release the |
147 | * call's ref on the connection. | |
999b69f8 | 148 | */ |
45025bce DH |
149 | void __rxrpc_disconnect_call(struct rxrpc_connection *conn, |
150 | struct rxrpc_call *call) | |
999b69f8 | 151 | { |
01a90a45 DH |
152 | struct rxrpc_channel *chan = |
153 | &conn->channels[call->cid & RXRPC_CHANNELMASK]; | |
999b69f8 | 154 | |
01a90a45 | 155 | _enter("%d,%x", conn->debug_id, call->cid); |
999b69f8 | 156 | |
9d35d880 | 157 | if (chan->call == call) { |
a1399f8b DH |
158 | /* Save the result of the call so that we can repeat it if necessary |
159 | * through the channel, whilst disposing of the actual call record. | |
160 | */ | |
b1d9f7fd | 161 | trace_rxrpc_disconnect_call(call); |
17e9e23b DH |
162 | switch (call->completion) { |
163 | case RXRPC_CALL_SUCCEEDED: | |
5d7edbc9 | 164 | chan->last_seq = call->rx_highest_seq; |
18bfeba5 | 165 | chan->last_type = RXRPC_PACKET_TYPE_ACK; |
17e9e23b DH |
166 | break; |
167 | case RXRPC_CALL_LOCALLY_ABORTED: | |
168 | chan->last_abort = call->abort_code; | |
169 | chan->last_type = RXRPC_PACKET_TYPE_ABORT; | |
170 | break; | |
171 | default: | |
de696c47 | 172 | chan->last_abort = RX_CALL_DEAD; |
17e9e23b DH |
173 | chan->last_type = RXRPC_PACKET_TYPE_ABORT; |
174 | break; | |
18bfeba5 | 175 | } |
17e9e23b | 176 | |
a1399f8b DH |
177 | chan->last_call = chan->call_id; |
178 | chan->call_id = chan->call_counter; | |
9d35d880 | 179 | chan->call = NULL; |
999b69f8 | 180 | } |
e653cfe4 | 181 | |
a1399f8b DH |
182 | _leave(""); |
183 | } | |
184 | ||
185 | /* | |
186 | * Disconnect a call and clear any channel it occupies when that call | |
187 | * terminates. | |
188 | */ | |
189 | void rxrpc_disconnect_call(struct rxrpc_call *call) | |
190 | { | |
191 | struct rxrpc_connection *conn = call->conn; | |
192 | ||
5040011d DH |
193 | set_bit(RXRPC_CALL_DISCONNECTED, &call->flags); |
194 | rxrpc_see_call(call, rxrpc_call_see_disconnected); | |
195 | ||
1fc4fa2a | 196 | call->peer->cong_ssthresh = call->cong_ssthresh; |
f7aec129 | 197 | |
65550098 | 198 | if (!hlist_unhashed(&call->error_link)) { |
29fb4ec3 DH |
199 | spin_lock(&call->peer->lock); |
200 | hlist_del_init(&call->error_link); | |
201 | spin_unlock(&call->peer->lock); | |
65550098 | 202 | } |
248f219c | 203 | |
5040011d | 204 | if (rxrpc_is_client_call(call)) { |
1bab27af | 205 | rxrpc_disconnect_client_call(call->bundle, call); |
5040011d | 206 | } else { |
5040011d | 207 | __rxrpc_disconnect_call(conn, call); |
5040011d DH |
208 | conn->idle_timestamp = jiffies; |
209 | if (atomic_dec_and_test(&conn->active)) | |
210 | rxrpc_set_service_reap_timer(conn->rxnet, | |
61e4a866 | 211 | jiffies + rxrpc_connection_expiry * HZ); |
5040011d | 212 | } |
e653cfe4 | 213 | |
5040011d | 214 | rxrpc_put_call(call, rxrpc_call_put_io_thread); |
45025bce DH |
215 | } |
216 | ||
17926a79 | 217 | /* |
363deeab DH |
218 | * Queue a connection's work processor, getting a ref to pass to the work |
219 | * queue. | |
17926a79 | 220 | */ |
3cec055c | 221 | void rxrpc_queue_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why) |
17926a79 | 222 | { |
3cec055c DH |
223 | if (atomic_read(&conn->active) >= 0 && |
224 | rxrpc_queue_work(&conn->processor)) | |
225 | rxrpc_see_connection(conn, why); | |
363deeab DH |
226 | } |
227 | ||
228 | /* | |
229 | * Note the re-emergence of a connection. | |
230 | */ | |
7fa25105 DH |
231 | void rxrpc_see_connection(struct rxrpc_connection *conn, |
232 | enum rxrpc_conn_trace why) | |
363deeab | 233 | { |
363deeab | 234 | if (conn) { |
7fa25105 | 235 | int r = refcount_read(&conn->ref); |
363deeab | 236 | |
7fa25105 | 237 | trace_rxrpc_conn(conn->debug_id, r, why); |
363deeab DH |
238 | } |
239 | } | |
240 | ||
241 | /* | |
242 | * Get a ref on a connection. | |
243 | */ | |
7fa25105 DH |
244 | struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *conn, |
245 | enum rxrpc_conn_trace why) | |
363deeab | 246 | { |
a0575429 | 247 | int r; |
363deeab | 248 | |
a0575429 | 249 | __refcount_inc(&conn->ref, &r); |
7fa25105 | 250 | trace_rxrpc_conn(conn->debug_id, r + 1, why); |
245500d8 | 251 | return conn; |
363deeab DH |
252 | } |
253 | ||
254 | /* | |
255 | * Try to get a ref on a connection. | |
256 | */ | |
257 | struct rxrpc_connection * | |
7fa25105 DH |
258 | rxrpc_get_connection_maybe(struct rxrpc_connection *conn, |
259 | enum rxrpc_conn_trace why) | |
363deeab | 260 | { |
a0575429 | 261 | int r; |
363deeab DH |
262 | |
263 | if (conn) { | |
a0575429 | 264 | if (__refcount_inc_not_zero(&conn->ref, &r)) |
7fa25105 | 265 | trace_rxrpc_conn(conn->debug_id, r + 1, why); |
363deeab DH |
266 | else |
267 | conn = NULL; | |
268 | } | |
269 | return conn; | |
270 | } | |
271 | ||
3d18cbb7 DH |
272 | /* |
273 | * Set the service connection reap timer. | |
274 | */ | |
275 | static void rxrpc_set_service_reap_timer(struct rxrpc_net *rxnet, | |
276 | unsigned long reap_at) | |
277 | { | |
278 | if (rxnet->live) | |
279 | timer_reduce(&rxnet->service_conn_reap_timer, reap_at); | |
280 | } | |
281 | ||
17926a79 DH |
282 | /* |
283 | * destroy a virtual connection | |
284 | */ | |
3cec055c | 285 | static void rxrpc_rcu_free_connection(struct rcu_head *rcu) |
17926a79 | 286 | { |
dee46364 DH |
287 | struct rxrpc_connection *conn = |
288 | container_of(rcu, struct rxrpc_connection, rcu); | |
3cec055c | 289 | struct rxrpc_net *rxnet = conn->rxnet; |
dee46364 | 290 | |
a0575429 | 291 | _enter("{%d,u=%d}", conn->debug_id, refcount_read(&conn->ref)); |
17926a79 | 292 | |
7fa25105 DH |
293 | trace_rxrpc_conn(conn->debug_id, refcount_read(&conn->ref), |
294 | rxrpc_conn_free); | |
3cec055c | 295 | kfree(conn); |
7fa25105 | 296 | |
3cec055c DH |
297 | if (atomic_dec_and_test(&rxnet->nr_conns)) |
298 | wake_up_var(&rxnet->nr_conns); | |
299 | } | |
300 | ||
301 | /* | |
302 | * Clean up a dead connection. | |
303 | */ | |
304 | static void rxrpc_clean_up_connection(struct work_struct *work) | |
305 | { | |
306 | struct rxrpc_connection *conn = | |
307 | container_of(work, struct rxrpc_connection, destructor); | |
308 | struct rxrpc_net *rxnet = conn->rxnet; | |
309 | ||
9d35d880 DH |
310 | ASSERT(!conn->channels[0].call && |
311 | !conn->channels[1].call && | |
312 | !conn->channels[2].call && | |
313 | !conn->channels[3].call); | |
3cec055c | 314 | ASSERT(list_empty(&conn->cache_link)); |
17926a79 | 315 | |
3136ef49 | 316 | del_timer_sync(&conn->timer); |
3cec055c DH |
317 | cancel_work_sync(&conn->processor); /* Processing may restart the timer */ |
318 | del_timer_sync(&conn->timer); | |
319 | ||
320 | write_lock(&rxnet->conn_lock); | |
321 | list_del_init(&conn->proc_link); | |
322 | write_unlock(&rxnet->conn_lock); | |
323 | ||
17926a79 DH |
324 | rxrpc_purge_queue(&conn->rx_queue); |
325 | ||
3cec055c DH |
326 | rxrpc_kill_client_conn(conn); |
327 | ||
e0e4d82f | 328 | conn->security->clear(conn); |
2cc80086 | 329 | key_put(conn->key); |
fa3492ab | 330 | rxrpc_put_bundle(conn->bundle, rxrpc_bundle_put_conn); |
47c810a7 | 331 | rxrpc_put_peer(conn->peer, rxrpc_peer_put_conn); |
0fde882f | 332 | rxrpc_put_local(conn->local, rxrpc_local_put_kill_conn); |
e0e4d82f | 333 | |
3cec055c DH |
334 | /* Drain the Rx queue. Note that even though we've unpublished, an |
335 | * incoming packet could still be being added to our Rx queue, so we | |
336 | * will need to drain it again in the RCU cleanup handler. | |
337 | */ | |
338 | rxrpc_purge_queue(&conn->rx_queue); | |
339 | ||
49489bb0 DH |
340 | if (conn->tx_data_alloc.va) |
341 | __page_frag_cache_drain(virt_to_page(conn->tx_data_alloc.va), | |
342 | conn->tx_data_alloc.pagecnt_bias); | |
3cec055c DH |
343 | call_rcu(&conn->rcu, rxrpc_rcu_free_connection); |
344 | } | |
345 | ||
346 | /* | |
347 | * Drop a ref on a connection. | |
348 | */ | |
349 | void rxrpc_put_connection(struct rxrpc_connection *conn, | |
350 | enum rxrpc_conn_trace why) | |
351 | { | |
352 | unsigned int debug_id; | |
353 | bool dead; | |
354 | int r; | |
355 | ||
356 | if (!conn) | |
357 | return; | |
358 | ||
359 | debug_id = conn->debug_id; | |
360 | dead = __refcount_dec_and_test(&conn->ref, &r); | |
361 | trace_rxrpc_conn(debug_id, r - 1, why); | |
362 | if (dead) { | |
363 | del_timer(&conn->timer); | |
364 | cancel_work(&conn->processor); | |
365 | ||
366 | if (in_softirq() || work_busy(&conn->processor) || | |
367 | timer_pending(&conn->timer)) | |
368 | /* Can't use the rxrpc workqueue as we need to cancel/flush | |
369 | * something that may be running/waiting there. | |
370 | */ | |
371 | schedule_work(&conn->destructor); | |
372 | else | |
373 | rxrpc_clean_up_connection(&conn->destructor); | |
374 | } | |
17926a79 DH |
375 | } |
376 | ||
377 | /* | |
45025bce | 378 | * reap dead service connections |
17926a79 | 379 | */ |
2baec2c3 | 380 | void rxrpc_service_connection_reaper(struct work_struct *work) |
17926a79 DH |
381 | { |
382 | struct rxrpc_connection *conn, *_p; | |
2baec2c3 | 383 | struct rxrpc_net *rxnet = |
3d18cbb7 | 384 | container_of(work, struct rxrpc_net, service_conn_reaper); |
f859ab61 | 385 | unsigned long expire_at, earliest, idle_timestamp, now; |
3cec055c | 386 | int active; |
17926a79 DH |
387 | |
388 | LIST_HEAD(graveyard); | |
389 | ||
390 | _enter(""); | |
391 | ||
f51b4480 | 392 | now = jiffies; |
f859ab61 | 393 | earliest = now + MAX_JIFFY_OFFSET; |
17926a79 | 394 | |
2baec2c3 DH |
395 | write_lock(&rxnet->conn_lock); |
396 | list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) { | |
3cec055c DH |
397 | ASSERTCMP(atomic_read(&conn->active), >=, 0); |
398 | if (likely(atomic_read(&conn->active) > 0)) | |
17926a79 | 399 | continue; |
00e90712 DH |
400 | if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) |
401 | continue; | |
17926a79 | 402 | |
2cc80086 | 403 | if (rxnet->live && !conn->local->dead) { |
f859ab61 DH |
404 | idle_timestamp = READ_ONCE(conn->idle_timestamp); |
405 | expire_at = idle_timestamp + rxrpc_connection_expiry * HZ; | |
2cc80086 | 406 | if (conn->local->service_closed) |
f859ab61 DH |
407 | expire_at = idle_timestamp + rxrpc_closed_conn_expiry * HZ; |
408 | ||
3cec055c DH |
409 | _debug("reap CONN %d { a=%d,t=%ld }", |
410 | conn->debug_id, atomic_read(&conn->active), | |
f859ab61 DH |
411 | (long)expire_at - (long)now); |
412 | ||
413 | if (time_before(now, expire_at)) { | |
414 | if (time_before(expire_at, earliest)) | |
415 | earliest = expire_at; | |
416 | continue; | |
417 | } | |
17926a79 | 418 | } |
001c1122 | 419 | |
3cec055c DH |
420 | /* The activity count sits at 0 whilst the conn is unused on |
421 | * the list; we reduce that to -1 to make the conn unavailable. | |
001c1122 | 422 | */ |
3cec055c DH |
423 | active = 0; |
424 | if (!atomic_try_cmpxchg(&conn->active, &active, -1)) | |
001c1122 | 425 | continue; |
7fa25105 | 426 | rxrpc_see_connection(conn, rxrpc_conn_see_reap_service); |
001c1122 DH |
427 | |
428 | if (rxrpc_conn_is_client(conn)) | |
45025bce | 429 | BUG(); |
001c1122 DH |
430 | else |
431 | rxrpc_unpublish_service_conn(conn); | |
432 | ||
433 | list_move_tail(&conn->link, &graveyard); | |
17926a79 | 434 | } |
2baec2c3 | 435 | write_unlock(&rxnet->conn_lock); |
17926a79 | 436 | |
f859ab61 DH |
437 | if (earliest != now + MAX_JIFFY_OFFSET) { |
438 | _debug("reschedule reaper %ld", (long)earliest - (long)now); | |
f51b4480 | 439 | ASSERT(time_after(earliest, now)); |
3d7682af | 440 | rxrpc_set_service_reap_timer(rxnet, earliest); |
17926a79 DH |
441 | } |
442 | ||
17926a79 DH |
443 | while (!list_empty(&graveyard)) { |
444 | conn = list_entry(graveyard.next, struct rxrpc_connection, | |
445 | link); | |
446 | list_del_init(&conn->link); | |
447 | ||
3cec055c DH |
448 | ASSERTCMP(atomic_read(&conn->active), ==, -1); |
449 | rxrpc_put_connection(conn, rxrpc_conn_put_service_reaped); | |
17926a79 DH |
450 | } |
451 | ||
452 | _leave(""); | |
453 | } | |
454 | ||
455 | /* | |
45025bce DH |
456 | * preemptively destroy all the service connection records rather than |
457 | * waiting for them to time out | |
17926a79 | 458 | */ |
2baec2c3 | 459 | void rxrpc_destroy_all_connections(struct rxrpc_net *rxnet) |
17926a79 | 460 | { |
dee46364 DH |
461 | struct rxrpc_connection *conn, *_p; |
462 | bool leak = false; | |
463 | ||
17926a79 DH |
464 | _enter(""); |
465 | ||
31f5f9a1 | 466 | atomic_dec(&rxnet->nr_conns); |
45025bce | 467 | |
3d18cbb7 DH |
468 | del_timer_sync(&rxnet->service_conn_reap_timer); |
469 | rxrpc_queue_work(&rxnet->service_conn_reaper); | |
dee46364 DH |
470 | flush_workqueue(rxrpc_workqueue); |
471 | ||
2baec2c3 DH |
472 | write_lock(&rxnet->conn_lock); |
473 | list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) { | |
dee46364 | 474 | pr_err("AF_RXRPC: Leaked conn %p {%d}\n", |
a0575429 | 475 | conn, refcount_read(&conn->ref)); |
dee46364 DH |
476 | leak = true; |
477 | } | |
2baec2c3 | 478 | write_unlock(&rxnet->conn_lock); |
dee46364 DH |
479 | BUG_ON(leak); |
480 | ||
2baec2c3 | 481 | ASSERT(list_empty(&rxnet->conn_proc_list)); |
17926a79 | 482 | |
31f5f9a1 DH |
483 | /* We need to wait for the connections to be destroyed by RCU as they |
484 | * pin things that we still need to get rid of. | |
485 | */ | |
5bb053be | 486 | wait_var_event(&rxnet->nr_conns, !atomic_read(&rxnet->nr_conns)); |
17926a79 DH |
487 | _leave(""); |
488 | } |