~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/rds/connection.c

Version: ~ [ linux-5.9-rc5 ] ~ [ linux-5.8.10 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.66 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.146 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.198 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.236 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.236 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (c) 2006 Oracle.  All rights reserved.
  3  *
  4  * This software is available to you under a choice of one of two
  5  * licenses.  You may choose to be licensed under the terms of the GNU
  6  * General Public License (GPL) Version 2, available from the file
  7  * COPYING in the main directory of this source tree, or the
  8  * OpenIB.org BSD license below:
  9  *
 10  *     Redistribution and use in source and binary forms, with or
 11  *     without modification, are permitted provided that the following
 12  *     conditions are met:
 13  *
 14  *      - Redistributions of source code must retain the above
 15  *        copyright notice, this list of conditions and the following
 16  *        disclaimer.
 17  *
 18  *      - Redistributions in binary form must reproduce the above
 19  *        copyright notice, this list of conditions and the following
 20  *        disclaimer in the documentation and/or other materials
 21  *        provided with the distribution.
 22  *
 23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 30  * SOFTWARE.
 31  *
 32  */
 33 #include <linux/kernel.h>
 34 #include <linux/list.h>
 35 #include <linux/slab.h>
 36 #include <linux/export.h>
 37 #include <net/inet_hashtables.h>
 38 
 39 #include "rds.h"
 40 #include "loop.h"
 41 
 42 #define RDS_CONNECTION_HASH_BITS 12
 43 #define RDS_CONNECTION_HASH_ENTRIES (1 << RDS_CONNECTION_HASH_BITS)
 44 #define RDS_CONNECTION_HASH_MASK (RDS_CONNECTION_HASH_ENTRIES - 1)
 45 
 46 /* converting this to RCU is a chore for another day.. */
 47 static DEFINE_SPINLOCK(rds_conn_lock);
 48 static unsigned long rds_conn_count;
 49 static struct hlist_head rds_conn_hash[RDS_CONNECTION_HASH_ENTRIES];
 50 static struct kmem_cache *rds_conn_slab;
 51 
 52 static struct hlist_head *rds_conn_bucket(__be32 laddr, __be32 faddr)
 53 {
 54         static u32 rds_hash_secret __read_mostly;
 55 
 56         unsigned long hash;
 57 
 58         net_get_random_once(&rds_hash_secret, sizeof(rds_hash_secret));
 59 
 60         /* Pass NULL, don't need struct net for hash */
 61         hash = __inet_ehashfn(be32_to_cpu(laddr), 0,
 62                               be32_to_cpu(faddr), 0,
 63                               rds_hash_secret);
 64         return &rds_conn_hash[hash & RDS_CONNECTION_HASH_MASK];
 65 }
 66 
 67 #define rds_conn_info_set(var, test, suffix) do {               \
 68         if (test)                                               \
 69                 var |= RDS_INFO_CONNECTION_FLAG_##suffix;       \
 70 } while (0)
 71 
 72 /* rcu read lock must be held or the connection spinlock */
 73 static struct rds_connection *rds_conn_lookup(struct hlist_head *head,
 74                                               __be32 laddr, __be32 faddr,
 75                                               struct rds_transport *trans)
 76 {
 77         struct rds_connection *conn, *ret = NULL;
 78 
 79         hlist_for_each_entry_rcu(conn, head, c_hash_node) {
 80                 if (conn->c_faddr == faddr && conn->c_laddr == laddr &&
 81                                 conn->c_trans == trans) {
 82                         ret = conn;
 83                         break;
 84                 }
 85         }
 86         rdsdebug("returning conn %p for %pI4 -> %pI4\n", ret,
 87                  &laddr, &faddr);
 88         return ret;
 89 }
 90 
 91 /*
 92  * This is called by transports as they're bringing down a connection.
 93  * It clears partial message state so that the transport can start sending
 94  * and receiving over this connection again in the future.  It is up to
 95  * the transport to have serialized this call with its send and recv.
 96  */
 97 static void rds_conn_reset(struct rds_connection *conn)
 98 {
 99         rdsdebug("connection %pI4 to %pI4 reset\n",
100           &conn->c_laddr, &conn->c_faddr);
101 
102         rds_stats_inc(s_conn_reset);
103         rds_send_reset(conn);
104         conn->c_flags = 0;
105 
106         /* Do not clear next_rx_seq here, else we cannot distinguish
107          * retransmitted packets from new packets, and will hand all
108          * of them to the application. That is not consistent with the
109          * reliability guarantees of RDS. */
110 }
111 
112 /*
113  * There is only every one 'conn' for a given pair of addresses in the
114  * system at a time.  They contain messages to be retransmitted and so
115  * span the lifetime of the actual underlying transport connections.
116  *
117  * For now they are not garbage collected once they're created.  They
118  * are torn down as the module is removed, if ever.
119  */
120 static struct rds_connection *__rds_conn_create(__be32 laddr, __be32 faddr,
121                                        struct rds_transport *trans, gfp_t gfp,
122                                        int is_outgoing)
123 {
124         struct rds_connection *conn, *parent = NULL;
125         struct hlist_head *head = rds_conn_bucket(laddr, faddr);
126         struct rds_transport *loop_trans;
127         unsigned long flags;
128         int ret;
129 
130         rcu_read_lock();
131         conn = rds_conn_lookup(head, laddr, faddr, trans);
132         if (conn && conn->c_loopback && conn->c_trans != &rds_loop_transport &&
133             !is_outgoing) {
134                 /* This is a looped back IB connection, and we're
135                  * called by the code handling the incoming connect.
136                  * We need a second connection object into which we
137                  * can stick the other QP. */
138                 parent = conn;
139                 conn = parent->c_passive;
140         }
141         rcu_read_unlock();
142         if (conn)
143                 goto out;
144 
145         conn = kmem_cache_zalloc(rds_conn_slab, gfp);
146         if (!conn) {
147                 conn = ERR_PTR(-ENOMEM);
148                 goto out;
149         }
150 
151         INIT_HLIST_NODE(&conn->c_hash_node);
152         conn->c_laddr = laddr;
153         conn->c_faddr = faddr;
154         spin_lock_init(&conn->c_lock);
155         conn->c_next_tx_seq = 1;
156 
157         init_waitqueue_head(&conn->c_waitq);
158         INIT_LIST_HEAD(&conn->c_send_queue);
159         INIT_LIST_HEAD(&conn->c_retrans);
160 
161         ret = rds_cong_get_maps(conn);
162         if (ret) {
163                 kmem_cache_free(rds_conn_slab, conn);
164                 conn = ERR_PTR(ret);
165                 goto out;
166         }
167 
168         /*
169          * This is where a connection becomes loopback.  If *any* RDS sockets
170          * can bind to the destination address then we'd rather the messages
171          * flow through loopback rather than either transport.
172          */
173         loop_trans = rds_trans_get_preferred(faddr);
174         if (loop_trans) {
175                 rds_trans_put(loop_trans);
176                 conn->c_loopback = 1;
177                 if (is_outgoing && trans->t_prefer_loopback) {
178                         /* "outgoing" connection - and the transport
179                          * says it wants the connection handled by the
180                          * loopback transport. This is what TCP does.
181                          */
182                         trans = &rds_loop_transport;
183                 }
184         }
185 
186         if (trans == NULL) {
187                 kmem_cache_free(rds_conn_slab, conn);
188                 conn = ERR_PTR(-ENODEV);
189                 goto out;
190         }
191 
192         conn->c_trans = trans;
193 
194         ret = trans->conn_alloc(conn, gfp);
195         if (ret) {
196                 kmem_cache_free(rds_conn_slab, conn);
197                 conn = ERR_PTR(ret);
198                 goto out;
199         }
200 
201         atomic_set(&conn->c_state, RDS_CONN_DOWN);
202         conn->c_reconnect_jiffies = 0;
203         INIT_DELAYED_WORK(&conn->c_send_w, rds_send_worker);
204         INIT_DELAYED_WORK(&conn->c_recv_w, rds_recv_worker);
205         INIT_DELAYED_WORK(&conn->c_conn_w, rds_connect_worker);
206         INIT_WORK(&conn->c_down_w, rds_shutdown_worker);
207         mutex_init(&conn->c_cm_lock);
208         conn->c_flags = 0;
209 
210         rdsdebug("allocated conn %p for %pI4 -> %pI4 over %s %s\n",
211           conn, &laddr, &faddr,
212           trans->t_name ? trans->t_name : "[unknown]",
213           is_outgoing ? "(outgoing)" : "");
214 
215         /*
216          * Since we ran without holding the conn lock, someone could
217          * have created the same conn (either normal or passive) in the
218          * interim. We check while holding the lock. If we won, we complete
219          * init and return our conn. If we lost, we rollback and return the
220          * other one.
221          */
222         spin_lock_irqsave(&rds_conn_lock, flags);
223         if (parent) {
224                 /* Creating passive conn */
225                 if (parent->c_passive) {
226                         trans->conn_free(conn->c_transport_data);
227                         kmem_cache_free(rds_conn_slab, conn);
228                         conn = parent->c_passive;
229                 } else {
230                         parent->c_passive = conn;
231                         rds_cong_add_conn(conn);
232                         rds_conn_count++;
233                 }
234         } else {
235                 /* Creating normal conn */
236                 struct rds_connection *found;
237 
238                 found = rds_conn_lookup(head, laddr, faddr, trans);
239                 if (found) {
240                         trans->conn_free(conn->c_transport_data);
241                         kmem_cache_free(rds_conn_slab, conn);
242                         conn = found;
243                 } else {
244                         hlist_add_head_rcu(&conn->c_hash_node, head);
245                         rds_cong_add_conn(conn);
246                         rds_conn_count++;
247                 }
248         }
249         spin_unlock_irqrestore(&rds_conn_lock, flags);
250 
251 out:
252         return conn;
253 }
254 
255 struct rds_connection *rds_conn_create(__be32 laddr, __be32 faddr,
256                                        struct rds_transport *trans, gfp_t gfp)
257 {
258         return __rds_conn_create(laddr, faddr, trans, gfp, 0);
259 }
260 EXPORT_SYMBOL_GPL(rds_conn_create);
261 
262 struct rds_connection *rds_conn_create_outgoing(__be32 laddr, __be32 faddr,
263                                        struct rds_transport *trans, gfp_t gfp)
264 {
265         return __rds_conn_create(laddr, faddr, trans, gfp, 1);
266 }
267 EXPORT_SYMBOL_GPL(rds_conn_create_outgoing);
268 
269 void rds_conn_shutdown(struct rds_connection *conn)
270 {
271         /* shut it down unless it's down already */
272         if (!rds_conn_transition(conn, RDS_CONN_DOWN, RDS_CONN_DOWN)) {
273                 /*
274                  * Quiesce the connection mgmt handlers before we start tearing
275                  * things down. We don't hold the mutex for the entire
276                  * duration of the shutdown operation, else we may be
277                  * deadlocking with the CM handler. Instead, the CM event
278                  * handler is supposed to check for state DISCONNECTING
279                  */
280                 mutex_lock(&conn->c_cm_lock);
281                 if (!rds_conn_transition(conn, RDS_CONN_UP, RDS_CONN_DISCONNECTING)
282                  && !rds_conn_transition(conn, RDS_CONN_ERROR, RDS_CONN_DISCONNECTING)) {
283                         rds_conn_error(conn, "shutdown called in state %d\n",
284                                         atomic_read(&conn->c_state));
285                         mutex_unlock(&conn->c_cm_lock);
286                         return;
287                 }
288                 mutex_unlock(&conn->c_cm_lock);
289 
290                 wait_event(conn->c_waitq,
291                            !test_bit(RDS_IN_XMIT, &conn->c_flags));
292 
293                 conn->c_trans->conn_shutdown(conn);
294                 rds_conn_reset(conn);
295 
296                 if (!rds_conn_transition(conn, RDS_CONN_DISCONNECTING, RDS_CONN_DOWN)) {
297                         /* This can happen - eg when we're in the middle of tearing
298                          * down the connection, and someone unloads the rds module.
299                          * Quite reproduceable with loopback connections.
300                          * Mostly harmless.
301                          */
302                         rds_conn_error(conn,
303                                 "%s: failed to transition to state DOWN, "
304                                 "current state is %d\n",
305                                 __func__,
306                                 atomic_read(&conn->c_state));
307                         return;
308                 }
309         }
310 
311         /* Then reconnect if it's still live.
312          * The passive side of an IB loopback connection is never added
313          * to the conn hash, so we never trigger a reconnect on this
314          * conn - the reconnect is always triggered by the active peer. */
315         cancel_delayed_work_sync(&conn->c_conn_w);
316         rcu_read_lock();
317         if (!hlist_unhashed(&conn->c_hash_node)) {
318                 rcu_read_unlock();
319                 rds_queue_reconnect(conn);
320         } else {
321                 rcu_read_unlock();
322         }
323 }
324 
325 /*
326  * Stop and free a connection.
327  *
328  * This can only be used in very limited circumstances.  It assumes that once
329  * the conn has been shutdown that no one else is referencing the connection.
330  * We can only ensure this in the rmmod path in the current code.
331  */
332 void rds_conn_destroy(struct rds_connection *conn)
333 {
334         struct rds_message *rm, *rtmp;
335         unsigned long flags;
336 
337         rdsdebug("freeing conn %p for %pI4 -> "
338                  "%pI4\n", conn, &conn->c_laddr,
339                  &conn->c_faddr);
340 
341         /* Ensure conn will not be scheduled for reconnect */
342         spin_lock_irq(&rds_conn_lock);
343         hlist_del_init_rcu(&conn->c_hash_node);
344         spin_unlock_irq(&rds_conn_lock);
345         synchronize_rcu();
346 
347         /* shut the connection down */
348         rds_conn_drop(conn);
349         flush_work(&conn->c_down_w);
350 
351         /* make sure lingering queued work won't try to ref the conn */
352         cancel_delayed_work_sync(&conn->c_send_w);
353         cancel_delayed_work_sync(&conn->c_recv_w);
354 
355         /* tear down queued messages */
356         list_for_each_entry_safe(rm, rtmp,
357                                  &conn->c_send_queue,
358                                  m_conn_item) {
359                 list_del_init(&rm->m_conn_item);
360                 BUG_ON(!list_empty(&rm->m_sock_item));
361                 rds_message_put(rm);
362         }
363         if (conn->c_xmit_rm)
364                 rds_message_put(conn->c_xmit_rm);
365 
366         conn->c_trans->conn_free(conn->c_transport_data);
367 
368         /*
369          * The congestion maps aren't freed up here.  They're
370          * freed by rds_cong_exit() after all the connections
371          * have been freed.
372          */
373         rds_cong_remove_conn(conn);
374 
375         BUG_ON(!list_empty(&conn->c_retrans));
376         kmem_cache_free(rds_conn_slab, conn);
377 
378         spin_lock_irqsave(&rds_conn_lock, flags);
379         rds_conn_count--;
380         spin_unlock_irqrestore(&rds_conn_lock, flags);
381 }
382 EXPORT_SYMBOL_GPL(rds_conn_destroy);
383 
384 static void rds_conn_message_info(struct socket *sock, unsigned int len,
385                                   struct rds_info_iterator *iter,
386                                   struct rds_info_lengths *lens,
387                                   int want_send)
388 {
389         struct hlist_head *head;
390         struct list_head *list;
391         struct rds_connection *conn;
392         struct rds_message *rm;
393         unsigned int total = 0;
394         unsigned long flags;
395         size_t i;
396 
397         len /= sizeof(struct rds_info_message);
398 
399         rcu_read_lock();
400 
401         for (i = 0, head = rds_conn_hash; i < ARRAY_SIZE(rds_conn_hash);
402              i++, head++) {
403                 hlist_for_each_entry_rcu(conn, head, c_hash_node) {
404                         if (want_send)
405                                 list = &conn->c_send_queue;
406                         else
407                                 list = &conn->c_retrans;
408 
409                         spin_lock_irqsave(&conn->c_lock, flags);
410 
411                         /* XXX too lazy to maintain counts.. */
412                         list_for_each_entry(rm, list, m_conn_item) {
413                                 total++;
414                                 if (total <= len)
415                                         rds_inc_info_copy(&rm->m_inc, iter,
416                                                           conn->c_laddr,
417                                                           conn->c_faddr, 0);
418                         }
419 
420                         spin_unlock_irqrestore(&conn->c_lock, flags);
421                 }
422         }
423         rcu_read_unlock();
424 
425         lens->nr = total;
426         lens->each = sizeof(struct rds_info_message);
427 }
428 
429 static void rds_conn_message_info_send(struct socket *sock, unsigned int len,
430                                        struct rds_info_iterator *iter,
431                                        struct rds_info_lengths *lens)
432 {
433         rds_conn_message_info(sock, len, iter, lens, 1);
434 }
435 
436 static void rds_conn_message_info_retrans(struct socket *sock,
437                                           unsigned int len,
438                                           struct rds_info_iterator *iter,
439                                           struct rds_info_lengths *lens)
440 {
441         rds_conn_message_info(sock, len, iter, lens, 0);
442 }
443 
444 void rds_for_each_conn_info(struct socket *sock, unsigned int len,
445                           struct rds_info_iterator *iter,
446                           struct rds_info_lengths *lens,
447                           int (*visitor)(struct rds_connection *, void *),
448                           size_t item_len)
449 {
450         uint64_t buffer[(item_len + 7) / 8];
451         struct hlist_head *head;
452         struct rds_connection *conn;
453         size_t i;
454 
455         rcu_read_lock();
456 
457         lens->nr = 0;
458         lens->each = item_len;
459 
460         for (i = 0, head = rds_conn_hash; i < ARRAY_SIZE(rds_conn_hash);
461              i++, head++) {
462                 hlist_for_each_entry_rcu(conn, head, c_hash_node) {
463 
464                         /* XXX no c_lock usage.. */
465                         if (!visitor(conn, buffer))
466                                 continue;
467 
468                         /* We copy as much as we can fit in the buffer,
469                          * but we count all items so that the caller
470                          * can resize the buffer. */
471                         if (len >= item_len) {
472                                 rds_info_copy(iter, buffer, item_len);
473                                 len -= item_len;
474                         }
475                         lens->nr++;
476                 }
477         }
478         rcu_read_unlock();
479 }
480 EXPORT_SYMBOL_GPL(rds_for_each_conn_info);
481 
482 static int rds_conn_info_visitor(struct rds_connection *conn,
483                                   void *buffer)
484 {
485         struct rds_info_connection *cinfo = buffer;
486 
487         cinfo->next_tx_seq = conn->c_next_tx_seq;
488         cinfo->next_rx_seq = conn->c_next_rx_seq;
489         cinfo->laddr = conn->c_laddr;
490         cinfo->faddr = conn->c_faddr;
491         strncpy(cinfo->transport, conn->c_trans->t_name,
492                 sizeof(cinfo->transport));
493         cinfo->flags = 0;
494 
495         rds_conn_info_set(cinfo->flags, test_bit(RDS_IN_XMIT, &conn->c_flags),
496                           SENDING);
497         /* XXX Future: return the state rather than these funky bits */
498         rds_conn_info_set(cinfo->flags,
499                           atomic_read(&conn->c_state) == RDS_CONN_CONNECTING,
500                           CONNECTING);
501         rds_conn_info_set(cinfo->flags,
502                           atomic_read(&conn->c_state) == RDS_CONN_UP,
503                           CONNECTED);
504         return 1;
505 }
506 
507 static void rds_conn_info(struct socket *sock, unsigned int len,
508                           struct rds_info_iterator *iter,
509                           struct rds_info_lengths *lens)
510 {
511         rds_for_each_conn_info(sock, len, iter, lens,
512                                 rds_conn_info_visitor,
513                                 sizeof(struct rds_info_connection));
514 }
515 
516 int rds_conn_init(void)
517 {
518         rds_conn_slab = kmem_cache_create("rds_connection",
519                                           sizeof(struct rds_connection),
520                                           0, 0, NULL);
521         if (!rds_conn_slab)
522                 return -ENOMEM;
523 
524         rds_info_register_func(RDS_INFO_CONNECTIONS, rds_conn_info);
525         rds_info_register_func(RDS_INFO_SEND_MESSAGES,
526                                rds_conn_message_info_send);
527         rds_info_register_func(RDS_INFO_RETRANS_MESSAGES,
528                                rds_conn_message_info_retrans);
529 
530         return 0;
531 }
532 
533 void rds_conn_exit(void)
534 {
535         rds_loop_exit();
536 
537         WARN_ON(!hlist_empty(rds_conn_hash));
538 
539         kmem_cache_destroy(rds_conn_slab);
540 
541         rds_info_deregister_func(RDS_INFO_CONNECTIONS, rds_conn_info);
542         rds_info_deregister_func(RDS_INFO_SEND_MESSAGES,
543                                  rds_conn_message_info_send);
544         rds_info_deregister_func(RDS_INFO_RETRANS_MESSAGES,
545                                  rds_conn_message_info_retrans);
546 }
547 
548 /*
549  * Force a disconnect
550  */
551 void rds_conn_drop(struct rds_connection *conn)
552 {
553         atomic_set(&conn->c_state, RDS_CONN_ERROR);
554         queue_work(rds_wq, &conn->c_down_w);
555 }
556 EXPORT_SYMBOL_GPL(rds_conn_drop);
557 
558 /*
559  * If the connection is down, trigger a connect. We may have scheduled a
560  * delayed reconnect however - in this case we should not interfere.
561  */
562 void rds_conn_connect_if_down(struct rds_connection *conn)
563 {
564         if (rds_conn_state(conn) == RDS_CONN_DOWN &&
565             !test_and_set_bit(RDS_RECONNECT_PENDING, &conn->c_flags))
566                 queue_delayed_work(rds_wq, &conn->c_conn_w, 0);
567 }
568 EXPORT_SYMBOL_GPL(rds_conn_connect_if_down);
569 
570 /*
571  * An error occurred on the connection
572  */
573 void
574 __rds_conn_error(struct rds_connection *conn, const char *fmt, ...)
575 {
576         va_list ap;
577 
578         va_start(ap, fmt);
579         vprintk(fmt, ap);
580         va_end(ap);
581 
582         rds_conn_drop(conn);
583 }
584 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp