]>
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 | |
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); |
999b69f8 | 44 | spin_lock_init(&conn->channel_lock); |
45025bce | 45 | INIT_LIST_HEAD(&conn->waiting_calls); |
3136ef49 | 46 | timer_setup(&conn->timer, &rxrpc_connection_timer, 0); |
17926a79 | 47 | INIT_WORK(&conn->processor, &rxrpc_process_connection); |
4d028b2c | 48 | INIT_LIST_HEAD(&conn->proc_link); |
999b69f8 | 49 | INIT_LIST_HEAD(&conn->link); |
17926a79 | 50 | skb_queue_head_init(&conn->rx_queue); |
e0e4d82f | 51 | conn->security = &rxrpc_no_security; |
17926a79 | 52 | spin_lock_init(&conn->state_lock); |
17926a79 | 53 | conn->debug_id = atomic_inc_return(&rxrpc_debug_id); |
17926a79 | 54 | conn->size_align = 4; |
f51b4480 | 55 | conn->idle_timestamp = jiffies; |
17926a79 DH |
56 | } |
57 | ||
16c61add | 58 | _leave(" = %p{%d}", conn, conn ? conn->debug_id : 0); |
17926a79 DH |
59 | return conn; |
60 | } | |
61 | ||
17926a79 | 62 | /* |
8496af50 DH |
63 | * Look up a connection in the cache by protocol parameters. |
64 | * | |
65 | * If successful, a pointer to the connection is returned, but no ref is taken. | |
66 | * NULL is returned if there is no match. | |
67 | * | |
0099dc58 DH |
68 | * When searching for a service call, if we find a peer but no connection, we |
69 | * return that through *_peer in case we need to create a new service call. | |
70 | * | |
8496af50 | 71 | * The caller must be holding the RCU read lock. |
17926a79 | 72 | */ |
8496af50 | 73 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *local, |
0099dc58 DH |
74 | struct sk_buff *skb, |
75 | struct rxrpc_peer **_peer) | |
17926a79 DH |
76 | { |
77 | struct rxrpc_connection *conn; | |
1291e9d1 | 78 | struct rxrpc_conn_proto k; |
42886ffe | 79 | struct rxrpc_skb_priv *sp = rxrpc_skb(skb); |
1291e9d1 DH |
80 | struct sockaddr_rxrpc srx; |
81 | struct rxrpc_peer *peer; | |
17926a79 | 82 | |
8496af50 | 83 | _enter(",%x", sp->hdr.cid & RXRPC_CIDMASK); |
17926a79 | 84 | |
5a790b73 | 85 | if (rxrpc_extract_addr_from_skb(&srx, skb) < 0) |
1291e9d1 | 86 | goto not_found; |
17926a79 | 87 | |
46894a13 DH |
88 | if (srx.transport.family != local->srx.transport.family && |
89 | (srx.transport.family == AF_INET && | |
90 | local->srx.transport.family != AF_INET6)) { | |
1291e9d1 DH |
91 | pr_warn_ratelimited("AF_RXRPC: Protocol mismatch %u not %u\n", |
92 | srx.transport.family, | |
93 | local->srx.transport.family); | |
94 | goto not_found; | |
95 | } | |
96 | ||
97 | k.epoch = sp->hdr.epoch; | |
98 | k.cid = sp->hdr.cid & RXRPC_CIDMASK; | |
17926a79 | 99 | |
dc71db34 | 100 | if (rxrpc_to_server(sp)) { |
1291e9d1 DH |
101 | /* We need to look up service connections by the full protocol |
102 | * parameter set. We look up the peer first as an intermediate | |
103 | * step and then the connection from the peer's tree. | |
104 | */ | |
105 | peer = rxrpc_lookup_peer_rcu(local, &srx); | |
106 | if (!peer) | |
107 | goto not_found; | |
0099dc58 | 108 | *_peer = peer; |
8496af50 DH |
109 | conn = rxrpc_find_service_conn_rcu(peer, skb); |
110 | if (!conn || atomic_read(&conn->usage) == 0) | |
111 | goto not_found; | |
112 | _leave(" = %p", conn); | |
113 | return conn; | |
4a3388c8 | 114 | } else { |
8496af50 DH |
115 | /* Look up client connections by connection ID alone as their |
116 | * IDs are unique for this machine. | |
117 | */ | |
1291e9d1 | 118 | conn = idr_find(&rxrpc_client_conn_ids, |
8496af50 DH |
119 | sp->hdr.cid >> RXRPC_CIDSHIFT); |
120 | if (!conn || atomic_read(&conn->usage) == 0) { | |
121 | _debug("no conn"); | |
122 | goto not_found; | |
123 | } | |
124 | ||
125 | if (conn->proto.epoch != k.epoch || | |
1291e9d1 DH |
126 | conn->params.local != local) |
127 | goto not_found; | |
128 | ||
129 | peer = conn->params.peer; | |
130 | switch (srx.transport.family) { | |
131 | case AF_INET: | |
132 | if (peer->srx.transport.sin.sin_port != | |
133 | srx.transport.sin.sin_port || | |
134 | peer->srx.transport.sin.sin_addr.s_addr != | |
135 | srx.transport.sin.sin_addr.s_addr) | |
136 | goto not_found; | |
137 | break; | |
d1912747 | 138 | #ifdef CONFIG_AF_RXRPC_IPV6 |
75b54cb5 DH |
139 | case AF_INET6: |
140 | if (peer->srx.transport.sin6.sin6_port != | |
141 | srx.transport.sin6.sin6_port || | |
142 | memcmp(&peer->srx.transport.sin6.sin6_addr, | |
143 | &srx.transport.sin6.sin6_addr, | |
144 | sizeof(struct in6_addr)) != 0) | |
145 | goto not_found; | |
146 | break; | |
d1912747 | 147 | #endif |
1291e9d1 DH |
148 | default: |
149 | BUG(); | |
150 | } | |
151 | ||
1291e9d1 DH |
152 | _leave(" = %p", conn); |
153 | return conn; | |
17926a79 DH |
154 | } |
155 | ||
1291e9d1 | 156 | not_found: |
17926a79 DH |
157 | _leave(" = NULL"); |
158 | return NULL; | |
17926a79 DH |
159 | } |
160 | ||
999b69f8 DH |
161 | /* |
162 | * Disconnect a call and clear any channel it occupies when that call | |
a1399f8b DH |
163 | * terminates. The caller must hold the channel_lock and must release the |
164 | * call's ref on the connection. | |
999b69f8 | 165 | */ |
45025bce DH |
166 | void __rxrpc_disconnect_call(struct rxrpc_connection *conn, |
167 | struct rxrpc_call *call) | |
999b69f8 | 168 | { |
01a90a45 DH |
169 | struct rxrpc_channel *chan = |
170 | &conn->channels[call->cid & RXRPC_CHANNELMASK]; | |
999b69f8 | 171 | |
01a90a45 | 172 | _enter("%d,%x", conn->debug_id, call->cid); |
999b69f8 | 173 | |
a1399f8b DH |
174 | if (rcu_access_pointer(chan->call) == call) { |
175 | /* Save the result of the call so that we can repeat it if necessary | |
176 | * through the channel, whilst disposing of the actual call record. | |
177 | */ | |
b1d9f7fd | 178 | trace_rxrpc_disconnect_call(call); |
17e9e23b DH |
179 | switch (call->completion) { |
180 | case RXRPC_CALL_SUCCEEDED: | |
248f219c | 181 | chan->last_seq = call->rx_hard_ack; |
18bfeba5 | 182 | chan->last_type = RXRPC_PACKET_TYPE_ACK; |
17e9e23b DH |
183 | break; |
184 | case RXRPC_CALL_LOCALLY_ABORTED: | |
185 | chan->last_abort = call->abort_code; | |
186 | chan->last_type = RXRPC_PACKET_TYPE_ABORT; | |
187 | break; | |
188 | default: | |
189 | chan->last_abort = RX_USER_ABORT; | |
190 | chan->last_type = RXRPC_PACKET_TYPE_ABORT; | |
191 | break; | |
18bfeba5 | 192 | } |
17e9e23b | 193 | |
18bfeba5 | 194 | /* Sync with rxrpc_conn_retransmit(). */ |
a1399f8b DH |
195 | smp_wmb(); |
196 | chan->last_call = chan->call_id; | |
197 | chan->call_id = chan->call_counter; | |
e653cfe4 | 198 | |
a1399f8b | 199 | rcu_assign_pointer(chan->call, NULL); |
999b69f8 | 200 | } |
e653cfe4 | 201 | |
a1399f8b DH |
202 | _leave(""); |
203 | } | |
204 | ||
205 | /* | |
206 | * Disconnect a call and clear any channel it occupies when that call | |
207 | * terminates. | |
208 | */ | |
209 | void rxrpc_disconnect_call(struct rxrpc_call *call) | |
210 | { | |
211 | struct rxrpc_connection *conn = call->conn; | |
212 | ||
f7aec129 DH |
213 | call->peer->cong_cwnd = call->cong_cwnd; |
214 | ||
248f219c | 215 | spin_lock_bh(&conn->params.peer->lock); |
f3344303 | 216 | hlist_del_rcu(&call->error_link); |
248f219c DH |
217 | spin_unlock_bh(&conn->params.peer->lock); |
218 | ||
45025bce DH |
219 | if (rxrpc_is_client_call(call)) |
220 | return rxrpc_disconnect_client_call(call); | |
221 | ||
a1399f8b | 222 | spin_lock(&conn->channel_lock); |
45025bce | 223 | __rxrpc_disconnect_call(conn, call); |
e653cfe4 DH |
224 | spin_unlock(&conn->channel_lock); |
225 | ||
85527d31 | 226 | set_bit(RXRPC_CALL_DISCONNECTED, &call->flags); |
f51b4480 | 227 | conn->idle_timestamp = jiffies; |
999b69f8 DH |
228 | } |
229 | ||
45025bce DH |
230 | /* |
231 | * Kill off a connection. | |
232 | */ | |
233 | void rxrpc_kill_connection(struct rxrpc_connection *conn) | |
234 | { | |
2baec2c3 DH |
235 | struct rxrpc_net *rxnet = conn->params.local->rxnet; |
236 | ||
45025bce DH |
237 | ASSERT(!rcu_access_pointer(conn->channels[0].call) && |
238 | !rcu_access_pointer(conn->channels[1].call) && | |
239 | !rcu_access_pointer(conn->channels[2].call) && | |
240 | !rcu_access_pointer(conn->channels[3].call)); | |
241 | ASSERT(list_empty(&conn->cache_link)); | |
242 | ||
2baec2c3 | 243 | write_lock(&rxnet->conn_lock); |
45025bce | 244 | list_del_init(&conn->proc_link); |
2baec2c3 | 245 | write_unlock(&rxnet->conn_lock); |
45025bce DH |
246 | |
247 | /* Drain the Rx queue. Note that even though we've unpublished, an | |
248 | * incoming packet could still be being added to our Rx queue, so we | |
249 | * will need to drain it again in the RCU cleanup handler. | |
250 | */ | |
251 | rxrpc_purge_queue(&conn->rx_queue); | |
252 | ||
253 | /* Leave final destruction to RCU. The connection processor work item | |
254 | * must carry a ref on the connection to prevent us getting here whilst | |
255 | * it is queued or running. | |
256 | */ | |
257 | call_rcu(&conn->rcu, rxrpc_destroy_connection); | |
258 | } | |
259 | ||
17926a79 | 260 | /* |
363deeab DH |
261 | * Queue a connection's work processor, getting a ref to pass to the work |
262 | * queue. | |
17926a79 | 263 | */ |
363deeab | 264 | bool rxrpc_queue_conn(struct rxrpc_connection *conn) |
17926a79 | 265 | { |
363deeab | 266 | const void *here = __builtin_return_address(0); |
bfc18e38 | 267 | int n = atomic_fetch_add_unless(&conn->usage, 1, 0); |
363deeab DH |
268 | if (n == 0) |
269 | return false; | |
270 | if (rxrpc_queue_work(&conn->processor)) | |
4c1295dc | 271 | trace_rxrpc_conn(conn->debug_id, rxrpc_conn_queued, n + 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) { | |
284 | int n = atomic_read(&conn->usage); | |
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 | */ | |
293 | void rxrpc_get_connection(struct rxrpc_connection *conn) | |
294 | { | |
295 | const void *here = __builtin_return_address(0); | |
296 | int n = atomic_inc_return(&conn->usage); | |
297 | ||
4c1295dc | 298 | trace_rxrpc_conn(conn->debug_id, rxrpc_conn_got, n, here); |
363deeab DH |
299 | } |
300 | ||
301 | /* | |
302 | * Try to get a ref on a connection. | |
303 | */ | |
304 | struct rxrpc_connection * | |
305 | rxrpc_get_connection_maybe(struct rxrpc_connection *conn) | |
306 | { | |
307 | const void *here = __builtin_return_address(0); | |
308 | ||
309 | if (conn) { | |
bfc18e38 | 310 | int n = atomic_fetch_add_unless(&conn->usage, 1, 0); |
363deeab | 311 | if (n > 0) |
4c1295dc | 312 | trace_rxrpc_conn(conn->debug_id, rxrpc_conn_got, n + 1, here); |
363deeab DH |
313 | else |
314 | conn = NULL; | |
315 | } | |
316 | return conn; | |
317 | } | |
318 | ||
3d18cbb7 DH |
319 | /* |
320 | * Set the service connection reap timer. | |
321 | */ | |
322 | static void rxrpc_set_service_reap_timer(struct rxrpc_net *rxnet, | |
323 | unsigned long reap_at) | |
324 | { | |
325 | if (rxnet->live) | |
326 | timer_reduce(&rxnet->service_conn_reap_timer, reap_at); | |
327 | } | |
328 | ||
363deeab DH |
329 | /* |
330 | * Release a service connection | |
331 | */ | |
332 | void rxrpc_put_service_conn(struct rxrpc_connection *conn) | |
333 | { | |
334 | const void *here = __builtin_return_address(0); | |
4c1295dc | 335 | unsigned int debug_id = conn->debug_id; |
363deeab DH |
336 | int n; |
337 | ||
338 | n = atomic_dec_return(&conn->usage); | |
4c1295dc | 339 | trace_rxrpc_conn(debug_id, rxrpc_conn_put_service, n, here); |
363deeab | 340 | ASSERTCMP(n, >=, 0); |
3d18cbb7 DH |
341 | if (n == 1) |
342 | rxrpc_set_service_reap_timer(conn->params.local->rxnet, | |
343 | jiffies + rxrpc_connection_expiry); | |
17926a79 DH |
344 | } |
345 | ||
346 | /* | |
347 | * destroy a virtual connection | |
348 | */ | |
dee46364 | 349 | static void rxrpc_destroy_connection(struct rcu_head *rcu) |
17926a79 | 350 | { |
dee46364 DH |
351 | struct rxrpc_connection *conn = |
352 | container_of(rcu, struct rxrpc_connection, rcu); | |
353 | ||
354 | _enter("{%d,u=%d}", conn->debug_id, atomic_read(&conn->usage)); | |
17926a79 DH |
355 | |
356 | ASSERTCMP(atomic_read(&conn->usage), ==, 0); | |
357 | ||
358 | _net("DESTROY CONN %d", conn->debug_id); | |
359 | ||
3136ef49 | 360 | del_timer_sync(&conn->timer); |
17926a79 DH |
361 | rxrpc_purge_queue(&conn->rx_queue); |
362 | ||
e0e4d82f | 363 | conn->security->clear(conn); |
19ffa01c | 364 | key_put(conn->params.key); |
e0e4d82f | 365 | key_put(conn->server_key); |
aa390bbe | 366 | rxrpc_put_peer(conn->params.peer); |
31f5f9a1 DH |
367 | |
368 | if (atomic_dec_and_test(&conn->params.local->rxnet->nr_conns)) | |
5bb053be | 369 | wake_up_var(&conn->params.local->rxnet->nr_conns); |
aa390bbe | 370 | rxrpc_put_local(conn->params.local); |
e0e4d82f | 371 | |
17926a79 DH |
372 | kfree(conn); |
373 | _leave(""); | |
374 | } | |
375 | ||
376 | /* | |
45025bce | 377 | * reap dead service connections |
17926a79 | 378 | */ |
2baec2c3 | 379 | void rxrpc_service_connection_reaper(struct work_struct *work) |
17926a79 DH |
380 | { |
381 | struct rxrpc_connection *conn, *_p; | |
2baec2c3 | 382 | struct rxrpc_net *rxnet = |
3d18cbb7 | 383 | container_of(work, struct rxrpc_net, service_conn_reaper); |
f859ab61 | 384 | unsigned long expire_at, earliest, idle_timestamp, now; |
17926a79 DH |
385 | |
386 | LIST_HEAD(graveyard); | |
387 | ||
388 | _enter(""); | |
389 | ||
f51b4480 | 390 | now = jiffies; |
f859ab61 | 391 | earliest = now + MAX_JIFFY_OFFSET; |
17926a79 | 392 | |
2baec2c3 DH |
393 | write_lock(&rxnet->conn_lock); |
394 | list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) { | |
001c1122 DH |
395 | ASSERTCMP(atomic_read(&conn->usage), >, 0); |
396 | if (likely(atomic_read(&conn->usage) > 1)) | |
17926a79 | 397 | continue; |
00e90712 DH |
398 | if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) |
399 | continue; | |
17926a79 | 400 | |
d12040b6 | 401 | if (rxnet->live && !conn->params.local->dead) { |
f859ab61 DH |
402 | idle_timestamp = READ_ONCE(conn->idle_timestamp); |
403 | expire_at = idle_timestamp + rxrpc_connection_expiry * HZ; | |
404 | if (conn->params.local->service_closed) | |
405 | expire_at = idle_timestamp + rxrpc_closed_conn_expiry * HZ; | |
406 | ||
407 | _debug("reap CONN %d { u=%d,t=%ld }", | |
408 | conn->debug_id, atomic_read(&conn->usage), | |
409 | (long)expire_at - (long)now); | |
410 | ||
411 | if (time_before(now, expire_at)) { | |
412 | if (time_before(expire_at, earliest)) | |
413 | earliest = expire_at; | |
414 | continue; | |
415 | } | |
17926a79 | 416 | } |
001c1122 DH |
417 | |
418 | /* The usage count sits at 1 whilst the object is unused on the | |
419 | * list; we reduce that to 0 to make the object unavailable. | |
420 | */ | |
421 | if (atomic_cmpxchg(&conn->usage, 1, 0) != 1) | |
422 | continue; | |
4c1295dc | 423 | trace_rxrpc_conn(conn->debug_id, rxrpc_conn_reap_service, 0, NULL); |
001c1122 DH |
424 | |
425 | if (rxrpc_conn_is_client(conn)) | |
45025bce | 426 | BUG(); |
001c1122 DH |
427 | else |
428 | rxrpc_unpublish_service_conn(conn); | |
429 | ||
430 | list_move_tail(&conn->link, &graveyard); | |
17926a79 | 431 | } |
2baec2c3 | 432 | write_unlock(&rxnet->conn_lock); |
17926a79 | 433 | |
f859ab61 DH |
434 | if (earliest != now + MAX_JIFFY_OFFSET) { |
435 | _debug("reschedule reaper %ld", (long)earliest - (long)now); | |
f51b4480 | 436 | ASSERT(time_after(earliest, now)); |
3d7682af | 437 | rxrpc_set_service_reap_timer(rxnet, earliest); |
17926a79 DH |
438 | } |
439 | ||
17926a79 DH |
440 | while (!list_empty(&graveyard)) { |
441 | conn = list_entry(graveyard.next, struct rxrpc_connection, | |
442 | link); | |
443 | list_del_init(&conn->link); | |
444 | ||
445 | ASSERTCMP(atomic_read(&conn->usage), ==, 0); | |
45025bce | 446 | rxrpc_kill_connection(conn); |
17926a79 DH |
447 | } |
448 | ||
449 | _leave(""); | |
450 | } | |
451 | ||
452 | /* | |
45025bce DH |
453 | * preemptively destroy all the service connection records rather than |
454 | * waiting for them to time out | |
17926a79 | 455 | */ |
2baec2c3 | 456 | void rxrpc_destroy_all_connections(struct rxrpc_net *rxnet) |
17926a79 | 457 | { |
dee46364 DH |
458 | struct rxrpc_connection *conn, *_p; |
459 | bool leak = false; | |
460 | ||
17926a79 DH |
461 | _enter(""); |
462 | ||
31f5f9a1 | 463 | atomic_dec(&rxnet->nr_conns); |
2baec2c3 | 464 | rxrpc_destroy_all_client_connections(rxnet); |
45025bce | 465 | |
3d18cbb7 DH |
466 | del_timer_sync(&rxnet->service_conn_reap_timer); |
467 | rxrpc_queue_work(&rxnet->service_conn_reaper); | |
dee46364 DH |
468 | flush_workqueue(rxrpc_workqueue); |
469 | ||
2baec2c3 DH |
470 | write_lock(&rxnet->conn_lock); |
471 | list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) { | |
dee46364 DH |
472 | pr_err("AF_RXRPC: Leaked conn %p {%d}\n", |
473 | conn, atomic_read(&conn->usage)); | |
474 | leak = true; | |
475 | } | |
2baec2c3 | 476 | write_unlock(&rxnet->conn_lock); |
dee46364 DH |
477 | BUG_ON(leak); |
478 | ||
2baec2c3 | 479 | ASSERT(list_empty(&rxnet->conn_proc_list)); |
17926a79 | 480 | |
31f5f9a1 DH |
481 | /* We need to wait for the connections to be destroyed by RCU as they |
482 | * pin things that we still need to get rid of. | |
483 | */ | |
5bb053be | 484 | wait_var_event(&rxnet->nr_conns, !atomic_read(&rxnet->nr_conns)); |
17926a79 DH |
485 | _leave(""); |
486 | } |