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Commit | Line | Data |
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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 | |
45025bce DH |
22 | static void rxrpc_destroy_connection(struct rcu_head *); |
23 | ||
3136ef49 DH |
24 | static void rxrpc_connection_timer(struct timer_list *timer) |
25 | { | |
26 | struct rxrpc_connection *conn = | |
27 | container_of(timer, struct rxrpc_connection, timer); | |
28 | ||
29 | rxrpc_queue_conn(conn); | |
30 | } | |
31 | ||
17926a79 DH |
32 | /* |
33 | * allocate a new connection | |
34 | */ | |
c6d2b8d7 | 35 | struct rxrpc_connection *rxrpc_alloc_connection(gfp_t gfp) |
17926a79 DH |
36 | { |
37 | struct rxrpc_connection *conn; | |
38 | ||
39 | _enter(""); | |
40 | ||
41 | conn = kzalloc(sizeof(struct rxrpc_connection), gfp); | |
42 | if (conn) { | |
45025bce | 43 | INIT_LIST_HEAD(&conn->cache_link); |
3136ef49 | 44 | timer_setup(&conn->timer, &rxrpc_connection_timer, 0); |
17926a79 | 45 | INIT_WORK(&conn->processor, &rxrpc_process_connection); |
4d028b2c | 46 | INIT_LIST_HEAD(&conn->proc_link); |
999b69f8 | 47 | INIT_LIST_HEAD(&conn->link); |
17926a79 | 48 | skb_queue_head_init(&conn->rx_queue); |
e0e4d82f | 49 | conn->security = &rxrpc_no_security; |
17926a79 | 50 | spin_lock_init(&conn->state_lock); |
17926a79 | 51 | conn->debug_id = atomic_inc_return(&rxrpc_debug_id); |
f51b4480 | 52 | conn->idle_timestamp = jiffies; |
17926a79 DH |
53 | } |
54 | ||
16c61add | 55 | _leave(" = %p{%d}", conn, conn ? conn->debug_id : 0); |
17926a79 DH |
56 | return conn; |
57 | } | |
58 | ||
17926a79 | 59 | /* |
8496af50 DH |
60 | * Look up a connection in the cache by protocol parameters. |
61 | * | |
62 | * If successful, a pointer to the connection is returned, but no ref is taken. | |
63 | * NULL is returned if there is no match. | |
64 | * | |
0099dc58 DH |
65 | * When searching for a service call, if we find a peer but no connection, we |
66 | * return that through *_peer in case we need to create a new service call. | |
67 | * | |
8496af50 | 68 | * The caller must be holding the RCU read lock. |
17926a79 | 69 | */ |
8496af50 | 70 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *local, |
0099dc58 DH |
71 | struct sk_buff *skb, |
72 | struct rxrpc_peer **_peer) | |
17926a79 DH |
73 | { |
74 | struct rxrpc_connection *conn; | |
1291e9d1 | 75 | struct rxrpc_conn_proto k; |
42886ffe | 76 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
1291e9d1 DH |
77 | struct sockaddr_rxrpc srx; |
78 | struct rxrpc_peer *peer; | |
17926a79 | 79 | |
8496af50 | 80 | _enter(",%x", sp->hdr.cid & RXRPC_CIDMASK); |
17926a79 | 81 | |
5a790b73 | 82 | if (rxrpc_extract_addr_from_skb(&srx, skb) < 0) |
1291e9d1 | 83 | goto not_found; |
17926a79 | 84 | |
46894a13 DH |
85 | if (srx.transport.family != local->srx.transport.family && |
86 | (srx.transport.family == AF_INET && | |
87 | local->srx.transport.family != AF_INET6)) { | |
1291e9d1 DH |
88 | pr_warn_ratelimited("AF_RXRPC: Protocol mismatch %u not %u\n", |
89 | srx.transport.family, | |
90 | local->srx.transport.family); | |
91 | goto not_found; | |
92 | } | |
93 | ||
94 | k.epoch = sp->hdr.epoch; | |
95 | k.cid = sp->hdr.cid & RXRPC_CIDMASK; | |
17926a79 | 96 | |
dc71db34 | 97 | if (rxrpc_to_server(sp)) { |
1291e9d1 DH |
98 | /* We need to look up service connections by the full protocol |
99 | * parameter set. We look up the peer first as an intermediate | |
100 | * step and then the connection from the peer's tree. | |
101 | */ | |
102 | peer = rxrpc_lookup_peer_rcu(local, &srx); | |
103 | if (!peer) | |
104 | goto not_found; | |
0099dc58 | 105 | *_peer = peer; |
8496af50 | 106 | conn = rxrpc_find_service_conn_rcu(peer, skb); |
a0575429 | 107 | if (!conn || refcount_read(&conn->ref) == 0) |
8496af50 DH |
108 | goto not_found; |
109 | _leave(" = %p", conn); | |
110 | return conn; | |
4a3388c8 | 111 | } else { |
8496af50 DH |
112 | /* Look up client connections by connection ID alone as their |
113 | * IDs are unique for this machine. | |
114 | */ | |
1291e9d1 | 115 | conn = idr_find(&rxrpc_client_conn_ids, |
8496af50 | 116 | sp->hdr.cid >> RXRPC_CIDSHIFT); |
a0575429 | 117 | if (!conn || refcount_read(&conn->ref) == 0) { |
8496af50 DH |
118 | _debug("no conn"); |
119 | goto not_found; | |
120 | } | |
121 | ||
122 | if (conn->proto.epoch != k.epoch || | |
1291e9d1 DH |
123 | conn->params.local != local) |
124 | goto not_found; | |
125 | ||
126 | peer = conn->params.peer; | |
127 | switch (srx.transport.family) { | |
128 | case AF_INET: | |
129 | if (peer->srx.transport.sin.sin_port != | |
130 | srx.transport.sin.sin_port || | |
131 | peer->srx.transport.sin.sin_addr.s_addr != | |
132 | srx.transport.sin.sin_addr.s_addr) | |
133 | goto not_found; | |
134 | break; | |
d1912747 | 135 | #ifdef CONFIG_AF_RXRPC_IPV6 |
75b54cb5 DH |
136 | case AF_INET6: |
137 | if (peer->srx.transport.sin6.sin6_port != | |
138 | srx.transport.sin6.sin6_port || | |
139 | memcmp(&peer->srx.transport.sin6.sin6_addr, | |
140 | &srx.transport.sin6.sin6_addr, | |
141 | sizeof(struct in6_addr)) != 0) | |
142 | goto not_found; | |
143 | break; | |
d1912747 | 144 | #endif |
1291e9d1 DH |
145 | default: |
146 | BUG(); | |
147 | } | |
148 | ||
1291e9d1 DH |
149 | _leave(" = %p", conn); |
150 | return conn; | |
17926a79 DH |
151 | } |
152 | ||
1291e9d1 | 153 | not_found: |
17926a79 DH |
154 | _leave(" = NULL"); |
155 | return NULL; | |
17926a79 DH |
156 | } |
157 | ||
999b69f8 DH |
158 | /* |
159 | * Disconnect a call and clear any channel it occupies when that call | |
a1399f8b DH |
160 | * terminates. The caller must hold the channel_lock and must release the |
161 | * call's ref on the connection. | |
999b69f8 | 162 | */ |
45025bce DH |
163 | void __rxrpc_disconnect_call(struct rxrpc_connection *conn, |
164 | struct rxrpc_call *call) | |
999b69f8 | 165 | { |
01a90a45 DH |
166 | struct rxrpc_channel *chan = |
167 | &conn->channels[call->cid & RXRPC_CHANNELMASK]; | |
999b69f8 | 168 | |
01a90a45 | 169 | _enter("%d,%x", conn->debug_id, call->cid); |
999b69f8 | 170 | |
a1399f8b DH |
171 | if (rcu_access_pointer(chan->call) == call) { |
172 | /* Save the result of the call so that we can repeat it if necessary | |
173 | * through the channel, whilst disposing of the actual call record. | |
174 | */ | |
b1d9f7fd | 175 | trace_rxrpc_disconnect_call(call); |
17e9e23b DH |
176 | switch (call->completion) { |
177 | case RXRPC_CALL_SUCCEEDED: | |
248f219c | 178 | chan->last_seq = call->rx_hard_ack; |
18bfeba5 | 179 | chan->last_type = RXRPC_PACKET_TYPE_ACK; |
17e9e23b DH |
180 | break; |
181 | case RXRPC_CALL_LOCALLY_ABORTED: | |
182 | chan->last_abort = call->abort_code; | |
183 | chan->last_type = RXRPC_PACKET_TYPE_ABORT; | |
184 | break; | |
185 | default: | |
de696c47 | 186 | chan->last_abort = RX_CALL_DEAD; |
17e9e23b DH |
187 | chan->last_type = RXRPC_PACKET_TYPE_ABORT; |
188 | break; | |
18bfeba5 | 189 | } |
17e9e23b | 190 | |
18bfeba5 | 191 | /* Sync with rxrpc_conn_retransmit(). */ |
a1399f8b DH |
192 | smp_wmb(); |
193 | chan->last_call = chan->call_id; | |
194 | chan->call_id = chan->call_counter; | |
e653cfe4 | 195 | |
a1399f8b | 196 | rcu_assign_pointer(chan->call, NULL); |
999b69f8 | 197 | } |
e653cfe4 | 198 | |
a1399f8b DH |
199 | _leave(""); |
200 | } | |
201 | ||
202 | /* | |
203 | * Disconnect a call and clear any channel it occupies when that call | |
204 | * terminates. | |
205 | */ | |
206 | void rxrpc_disconnect_call(struct rxrpc_call *call) | |
207 | { | |
208 | struct rxrpc_connection *conn = call->conn; | |
209 | ||
f7aec129 DH |
210 | call->peer->cong_cwnd = call->cong_cwnd; |
211 | ||
65550098 DH |
212 | if (!hlist_unhashed(&call->error_link)) { |
213 | spin_lock_bh(&call->peer->lock); | |
214 | hlist_del_rcu(&call->error_link); | |
215 | spin_unlock_bh(&call->peer->lock); | |
216 | } | |
248f219c | 217 | |
45025bce | 218 | if (rxrpc_is_client_call(call)) |
245500d8 | 219 | return rxrpc_disconnect_client_call(conn->bundle, call); |
45025bce | 220 | |
245500d8 | 221 | spin_lock(&conn->bundle->channel_lock); |
45025bce | 222 | __rxrpc_disconnect_call(conn, call); |
245500d8 | 223 | spin_unlock(&conn->bundle->channel_lock); |
e653cfe4 | 224 | |
b39a934e | 225 | set_bit(RXRPC_CALL_DISCONNECTED, &call->flags); |
f51b4480 | 226 | conn->idle_timestamp = jiffies; |
999b69f8 DH |
227 | } |
228 | ||
45025bce DH |
229 | /* |
230 | * Kill off a connection. | |
231 | */ | |
232 | void rxrpc_kill_connection(struct rxrpc_connection *conn) | |
233 | { | |
2baec2c3 DH |
234 | struct rxrpc_net *rxnet = conn->params.local->rxnet; |
235 | ||
45025bce DH |
236 | ASSERT(!rcu_access_pointer(conn->channels[0].call) && |
237 | !rcu_access_pointer(conn->channels[1].call) && | |
238 | !rcu_access_pointer(conn->channels[2].call) && | |
239 | !rcu_access_pointer(conn->channels[3].call)); | |
240 | ASSERT(list_empty(&conn->cache_link)); | |
241 | ||
2baec2c3 | 242 | write_lock(&rxnet->conn_lock); |
45025bce | 243 | list_del_init(&conn->proc_link); |
2baec2c3 | 244 | write_unlock(&rxnet->conn_lock); |
45025bce DH |
245 | |
246 | /* Drain the Rx queue. Note that even though we've unpublished, an | |
247 | * incoming packet could still be being added to our Rx queue, so we | |
248 | * will need to drain it again in the RCU cleanup handler. | |
249 | */ | |
250 | rxrpc_purge_queue(&conn->rx_queue); | |
251 | ||
252 | /* Leave final destruction to RCU. The connection processor work item | |
253 | * must carry a ref on the connection to prevent us getting here whilst | |
254 | * it is queued or running. | |
255 | */ | |
256 | call_rcu(&conn->rcu, rxrpc_destroy_connection); | |
257 | } | |
258 | ||
17926a79 | 259 | /* |
363deeab DH |
260 | * Queue a connection's work processor, getting a ref to pass to the work |
261 | * queue. | |
17926a79 | 262 | */ |
363deeab | 263 | bool rxrpc_queue_conn(struct rxrpc_connection *conn) |
17926a79 | 264 | { |
363deeab | 265 | const void *here = __builtin_return_address(0); |
a0575429 DH |
266 | int r; |
267 | ||
268 | if (!__refcount_inc_not_zero(&conn->ref, &r)) | |
363deeab DH |
269 | return false; |
270 | if (rxrpc_queue_work(&conn->processor)) | |
a0575429 | 271 | trace_rxrpc_conn(conn->debug_id, rxrpc_conn_queued, r + 1, here); |
363deeab DH |
272 | else |
273 | rxrpc_put_connection(conn); | |
274 | return true; | |
275 | } | |
276 | ||
277 | /* | |
278 | * Note the re-emergence of a connection. | |
279 | */ | |
280 | void rxrpc_see_connection(struct rxrpc_connection *conn) | |
281 | { | |
282 | const void *here = __builtin_return_address(0); | |
283 | if (conn) { | |
a0575429 | 284 | int n = refcount_read(&conn->ref); |
363deeab | 285 | |
4c1295dc | 286 | trace_rxrpc_conn(conn->debug_id, rxrpc_conn_seen, n, here); |
363deeab DH |
287 | } |
288 | } | |
289 | ||
290 | /* | |
291 | * Get a ref on a connection. | |
292 | */ | |
245500d8 | 293 | struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *conn) |
363deeab DH |
294 | { |
295 | const void *here = __builtin_return_address(0); | |
a0575429 | 296 | int r; |
363deeab | 297 | |
a0575429 DH |
298 | __refcount_inc(&conn->ref, &r); |
299 | trace_rxrpc_conn(conn->debug_id, rxrpc_conn_got, r, here); | |
245500d8 | 300 | return conn; |
363deeab DH |
301 | } |
302 | ||
303 | /* | |
304 | * Try to get a ref on a connection. | |
305 | */ | |
306 | struct rxrpc_connection * | |
307 | rxrpc_get_connection_maybe(struct rxrpc_connection *conn) | |
308 | { | |
309 | const void *here = __builtin_return_address(0); | |
a0575429 | 310 | int r; |
363deeab DH |
311 | |
312 | if (conn) { | |
a0575429 DH |
313 | if (__refcount_inc_not_zero(&conn->ref, &r)) |
314 | trace_rxrpc_conn(conn->debug_id, rxrpc_conn_got, r + 1, here); | |
363deeab DH |
315 | else |
316 | conn = NULL; | |
317 | } | |
318 | return conn; | |
319 | } | |
320 | ||
3d18cbb7 DH |
321 | /* |
322 | * Set the service connection reap timer. | |
323 | */ | |
324 | static void rxrpc_set_service_reap_timer(struct rxrpc_net *rxnet, | |
325 | unsigned long reap_at) | |
326 | { | |
327 | if (rxnet->live) | |
328 | timer_reduce(&rxnet->service_conn_reap_timer, reap_at); | |
329 | } | |
330 | ||
363deeab DH |
331 | /* |
332 | * Release a service connection | |
333 | */ | |
334 | void rxrpc_put_service_conn(struct rxrpc_connection *conn) | |
335 | { | |
336 | const void *here = __builtin_return_address(0); | |
4c1295dc | 337 | unsigned int debug_id = conn->debug_id; |
a0575429 | 338 | int r; |
363deeab | 339 | |
a0575429 DH |
340 | __refcount_dec(&conn->ref, &r); |
341 | trace_rxrpc_conn(debug_id, rxrpc_conn_put_service, r - 1, here); | |
342 | if (r - 1 == 1) | |
3d18cbb7 DH |
343 | rxrpc_set_service_reap_timer(conn->params.local->rxnet, |
344 | jiffies + rxrpc_connection_expiry); | |
17926a79 DH |
345 | } |
346 | ||
347 | /* | |
348 | * destroy a virtual connection | |
349 | */ | |
dee46364 | 350 | static void rxrpc_destroy_connection(struct rcu_head *rcu) |
17926a79 | 351 | { |
dee46364 DH |
352 | struct rxrpc_connection *conn = |
353 | container_of(rcu, struct rxrpc_connection, rcu); | |
354 | ||
a0575429 | 355 | _enter("{%d,u=%d}", conn->debug_id, refcount_read(&conn->ref)); |
17926a79 | 356 | |
a0575429 | 357 | ASSERTCMP(refcount_read(&conn->ref), ==, 0); |
17926a79 DH |
358 | |
359 | _net("DESTROY CONN %d", conn->debug_id); | |
360 | ||
3136ef49 | 361 | del_timer_sync(&conn->timer); |
17926a79 DH |
362 | rxrpc_purge_queue(&conn->rx_queue); |
363 | ||
e0e4d82f | 364 | conn->security->clear(conn); |
19ffa01c | 365 | key_put(conn->params.key); |
245500d8 | 366 | rxrpc_put_bundle(conn->bundle); |
aa390bbe | 367 | rxrpc_put_peer(conn->params.peer); |
31f5f9a1 DH |
368 | |
369 | if (atomic_dec_and_test(&conn->params.local->rxnet->nr_conns)) | |
5bb053be | 370 | wake_up_var(&conn->params.local->rxnet->nr_conns); |
aa390bbe | 371 | rxrpc_put_local(conn->params.local); |
e0e4d82f | 372 | |
17926a79 DH |
373 | kfree(conn); |
374 | _leave(""); | |
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; |
17926a79 DH |
386 | |
387 | LIST_HEAD(graveyard); | |
388 | ||
389 | _enter(""); | |
390 | ||
f51b4480 | 391 | now = jiffies; |
f859ab61 | 392 | earliest = now + MAX_JIFFY_OFFSET; |
17926a79 | 393 | |
2baec2c3 DH |
394 | write_lock(&rxnet->conn_lock); |
395 | list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) { | |
a0575429 DH |
396 | ASSERTCMP(refcount_read(&conn->ref), >, 0); |
397 | if (likely(refcount_read(&conn->ref) > 1)) | |
17926a79 | 398 | continue; |
00e90712 DH |
399 | if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) |
400 | continue; | |
17926a79 | 401 | |
d12040b6 | 402 | if (rxnet->live && !conn->params.local->dead) { |
f859ab61 DH |
403 | idle_timestamp = READ_ONCE(conn->idle_timestamp); |
404 | expire_at = idle_timestamp + rxrpc_connection_expiry * HZ; | |
405 | if (conn->params.local->service_closed) | |
406 | expire_at = idle_timestamp + rxrpc_closed_conn_expiry * HZ; | |
407 | ||
408 | _debug("reap CONN %d { u=%d,t=%ld }", | |
a0575429 | 409 | conn->debug_id, refcount_read(&conn->ref), |
f859ab61 DH |
410 | (long)expire_at - (long)now); |
411 | ||
412 | if (time_before(now, expire_at)) { | |
413 | if (time_before(expire_at, earliest)) | |
414 | earliest = expire_at; | |
415 | continue; | |
416 | } | |
17926a79 | 417 | } |
001c1122 DH |
418 | |
419 | /* The usage count sits at 1 whilst the object is unused on the | |
420 | * list; we reduce that to 0 to make the object unavailable. | |
421 | */ | |
a0575429 | 422 | if (!refcount_dec_if_one(&conn->ref)) |
001c1122 | 423 | continue; |
4c1295dc | 424 | trace_rxrpc_conn(conn->debug_id, rxrpc_conn_reap_service, 0, NULL); |
001c1122 DH |
425 | |
426 | if (rxrpc_conn_is_client(conn)) | |
45025bce | 427 | BUG(); |
001c1122 DH |
428 | else |
429 | rxrpc_unpublish_service_conn(conn); | |
430 | ||
431 | list_move_tail(&conn->link, &graveyard); | |
17926a79 | 432 | } |
2baec2c3 | 433 | write_unlock(&rxnet->conn_lock); |
17926a79 | 434 | |
f859ab61 DH |
435 | if (earliest != now + MAX_JIFFY_OFFSET) { |
436 | _debug("reschedule reaper %ld", (long)earliest - (long)now); | |
f51b4480 | 437 | ASSERT(time_after(earliest, now)); |
3d7682af | 438 | rxrpc_set_service_reap_timer(rxnet, earliest); |
17926a79 DH |
439 | } |
440 | ||
17926a79 DH |
441 | while (!list_empty(&graveyard)) { |
442 | conn = list_entry(graveyard.next, struct rxrpc_connection, | |
443 | link); | |
444 | list_del_init(&conn->link); | |
445 | ||
a0575429 | 446 | ASSERTCMP(refcount_read(&conn->ref), ==, 0); |
45025bce | 447 | rxrpc_kill_connection(conn); |
17926a79 DH |
448 | } |
449 | ||
450 | _leave(""); | |
451 | } | |
452 | ||
453 | /* | |
45025bce DH |
454 | * preemptively destroy all the service connection records rather than |
455 | * waiting for them to time out | |
17926a79 | 456 | */ |
2baec2c3 | 457 | void rxrpc_destroy_all_connections(struct rxrpc_net *rxnet) |
17926a79 | 458 | { |
dee46364 DH |
459 | struct rxrpc_connection *conn, *_p; |
460 | bool leak = false; | |
461 | ||
17926a79 DH |
462 | _enter(""); |
463 | ||
31f5f9a1 | 464 | atomic_dec(&rxnet->nr_conns); |
2baec2c3 | 465 | rxrpc_destroy_all_client_connections(rxnet); |
45025bce | 466 | |
3d18cbb7 DH |
467 | del_timer_sync(&rxnet->service_conn_reap_timer); |
468 | rxrpc_queue_work(&rxnet->service_conn_reaper); | |
dee46364 DH |
469 | flush_workqueue(rxrpc_workqueue); |
470 | ||
2baec2c3 DH |
471 | write_lock(&rxnet->conn_lock); |
472 | list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) { | |
dee46364 | 473 | pr_err("AF_RXRPC: Leaked conn %p {%d}\n", |
a0575429 | 474 | conn, refcount_read(&conn->ref)); |
dee46364 DH |
475 | leak = true; |
476 | } | |
2baec2c3 | 477 | write_unlock(&rxnet->conn_lock); |
dee46364 DH |
478 | BUG_ON(leak); |
479 | ||
2baec2c3 | 480 | ASSERT(list_empty(&rxnet->conn_proc_list)); |
17926a79 | 481 | |
31f5f9a1 DH |
482 | /* We need to wait for the connections to be destroyed by RCU as they |
483 | * pin things that we still need to get rid of. | |
484 | */ | |
5bb053be | 485 | wait_var_event(&rxnet->nr_conns, !atomic_read(&rxnet->nr_conns)); |
17926a79 DH |
486 | _leave(""); |
487 | } |