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authorKurt Hackel <kurt.hackel@oracle.com>2005-12-15 17:31:23 -0500
committerJoel Becker <joel.becker@oracle.com>2006-01-03 14:45:47 -0500
commit6714d8e86bf443f6f7af50f9d432025649f091f5 (patch)
tree2c484bd1894a90cad7020869c7054f192d3bf34d /fs/ocfs2/dlm/dlmunlock.c
parent98211489d4147e41b11703e4245846d60b3acce4 (diff)
[PATCH] OCFS2: The Second Oracle Cluster Filesystem
A distributed lock manager built with the cluster file system use case in mind. The OCFS2 dlm exposes a VMS style API, though things have been simplified internally. The only lock levels implemented currently are NLMODE, PRMODE and EXMODE. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Diffstat (limited to 'fs/ocfs2/dlm/dlmunlock.c')
-rw-r--r--fs/ocfs2/dlm/dlmunlock.c672
1 files changed, 672 insertions, 0 deletions
diff --git a/fs/ocfs2/dlm/dlmunlock.c b/fs/ocfs2/dlm/dlmunlock.c
new file mode 100644
index 000000000000..cec2ce1cd318
--- /dev/null
+++ b/fs/ocfs2/dlm/dlmunlock.c
@@ -0,0 +1,672 @@
1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * dlmunlock.c
5 *
6 * underlying calls for unlocking locks
7 *
8 * Copyright (C) 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 *
25 */
26
27
28#include <linux/module.h>
29#include <linux/fs.h>
30#include <linux/types.h>
31#include <linux/slab.h>
32#include <linux/highmem.h>
33#include <linux/utsname.h>
34#include <linux/init.h>
35#include <linux/sysctl.h>
36#include <linux/random.h>
37#include <linux/blkdev.h>
38#include <linux/socket.h>
39#include <linux/inet.h>
40#include <linux/spinlock.h>
41#include <linux/delay.h>
42
43#include "cluster/heartbeat.h"
44#include "cluster/nodemanager.h"
45#include "cluster/tcp.h"
46
47#include "dlmapi.h"
48#include "dlmcommon.h"
49
50#define MLOG_MASK_PREFIX ML_DLM
51#include "cluster/masklog.h"
52
53#define DLM_UNLOCK_FREE_LOCK 0x00000001
54#define DLM_UNLOCK_CALL_AST 0x00000002
55#define DLM_UNLOCK_REMOVE_LOCK 0x00000004
56#define DLM_UNLOCK_REGRANT_LOCK 0x00000008
57#define DLM_UNLOCK_CLEAR_CONVERT_TYPE 0x00000010
58
59
60static enum dlm_status dlm_get_cancel_actions(struct dlm_ctxt *dlm,
61 struct dlm_lock_resource *res,
62 struct dlm_lock *lock,
63 struct dlm_lockstatus *lksb,
64 int *actions);
65static enum dlm_status dlm_get_unlock_actions(struct dlm_ctxt *dlm,
66 struct dlm_lock_resource *res,
67 struct dlm_lock *lock,
68 struct dlm_lockstatus *lksb,
69 int *actions);
70
71static enum dlm_status dlm_send_remote_unlock_request(struct dlm_ctxt *dlm,
72 struct dlm_lock_resource *res,
73 struct dlm_lock *lock,
74 struct dlm_lockstatus *lksb,
75 int flags,
76 u8 owner);
77
78
79/*
80 * according to the spec:
81 * http://opendlm.sourceforge.net/cvsmirror/opendlm/docs/dlmbook_final.pdf
82 *
83 * flags & LKM_CANCEL != 0: must be converting or blocked
84 * flags & LKM_CANCEL == 0: must be granted
85 *
86 * So to unlock a converting lock, you must first cancel the
87 * convert (passing LKM_CANCEL in flags), then call the unlock
88 * again (with no LKM_CANCEL in flags).
89 */
90
91
92/*
93 * locking:
94 * caller needs: none
95 * taken: res->spinlock and lock->spinlock taken and dropped
96 * held on exit: none
97 * returns: DLM_NORMAL, DLM_NOLOCKMGR, status from network
98 * all callers should have taken an extra ref on lock coming in
99 */
100static enum dlm_status dlmunlock_common(struct dlm_ctxt *dlm,
101 struct dlm_lock_resource *res,
102 struct dlm_lock *lock,
103 struct dlm_lockstatus *lksb,
104 int flags, int *call_ast,
105 int master_node)
106{
107 enum dlm_status status;
108 int actions = 0;
109 int in_use;
110 u8 owner;
111
112 mlog(0, "master_node = %d, valblk = %d\n", master_node,
113 flags & LKM_VALBLK);
114
115 if (master_node)
116 BUG_ON(res->owner != dlm->node_num);
117 else
118 BUG_ON(res->owner == dlm->node_num);
119
120 spin_lock(&dlm->spinlock);
121 /* We want to be sure that we're not freeing a lock
122 * that still has AST's pending... */
123 in_use = !list_empty(&lock->ast_list);
124 spin_unlock(&dlm->spinlock);
125 if (in_use) {
126 mlog(ML_ERROR, "lockres %.*s: Someone is calling dlmunlock "
127 "while waiting for an ast!", res->lockname.len,
128 res->lockname.name);
129 return DLM_BADPARAM;
130 }
131
132 spin_lock(&res->spinlock);
133 if (res->state & DLM_LOCK_RES_IN_PROGRESS) {
134 if (master_node) {
135 mlog(ML_ERROR, "lockres in progress!\n");
136 spin_unlock(&res->spinlock);
137 return DLM_FORWARD;
138 }
139 /* ok for this to sleep if not in a network handler */
140 __dlm_wait_on_lockres(res);
141 res->state |= DLM_LOCK_RES_IN_PROGRESS;
142 }
143 spin_lock(&lock->spinlock);
144
145 if (res->state & DLM_LOCK_RES_RECOVERING) {
146 status = DLM_RECOVERING;
147 goto leave;
148 }
149
150
151 /* see above for what the spec says about
152 * LKM_CANCEL and the lock queue state */
153 if (flags & LKM_CANCEL)
154 status = dlm_get_cancel_actions(dlm, res, lock, lksb, &actions);
155 else
156 status = dlm_get_unlock_actions(dlm, res, lock, lksb, &actions);
157
158 if (status != DLM_NORMAL)
159 goto leave;
160
161 /* By now this has been masked out of cancel requests. */
162 if (flags & LKM_VALBLK) {
163 /* make the final update to the lvb */
164 if (master_node)
165 memcpy(res->lvb, lksb->lvb, DLM_LVB_LEN);
166 else
167 flags |= LKM_PUT_LVB; /* let the send function
168 * handle it. */
169 }
170
171 if (!master_node) {
172 owner = res->owner;
173 /* drop locks and send message */
174 if (flags & LKM_CANCEL)
175 lock->cancel_pending = 1;
176 else
177 lock->unlock_pending = 1;
178 spin_unlock(&lock->spinlock);
179 spin_unlock(&res->spinlock);
180 status = dlm_send_remote_unlock_request(dlm, res, lock, lksb,
181 flags, owner);
182 spin_lock(&res->spinlock);
183 spin_lock(&lock->spinlock);
184 /* if the master told us the lock was already granted,
185 * let the ast handle all of these actions */
186 if (status == DLM_NORMAL &&
187 lksb->status == DLM_CANCELGRANT) {
188 actions &= ~(DLM_UNLOCK_REMOVE_LOCK|
189 DLM_UNLOCK_REGRANT_LOCK|
190 DLM_UNLOCK_CLEAR_CONVERT_TYPE);
191 }
192 if (flags & LKM_CANCEL)
193 lock->cancel_pending = 0;
194 else
195 lock->unlock_pending = 0;
196
197 }
198
199 /* get an extra ref on lock. if we are just switching
200 * lists here, we dont want the lock to go away. */
201 dlm_lock_get(lock);
202
203 if (actions & DLM_UNLOCK_REMOVE_LOCK) {
204 list_del_init(&lock->list);
205 dlm_lock_put(lock);
206 }
207 if (actions & DLM_UNLOCK_REGRANT_LOCK) {
208 dlm_lock_get(lock);
209 list_add_tail(&lock->list, &res->granted);
210 }
211 if (actions & DLM_UNLOCK_CLEAR_CONVERT_TYPE) {
212 mlog(0, "clearing convert_type at %smaster node\n",
213 master_node ? "" : "non-");
214 lock->ml.convert_type = LKM_IVMODE;
215 }
216
217 /* remove the extra ref on lock */
218 dlm_lock_put(lock);
219
220leave:
221 res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
222 if (!dlm_lock_on_list(&res->converting, lock))
223 BUG_ON(lock->ml.convert_type != LKM_IVMODE);
224 else
225 BUG_ON(lock->ml.convert_type == LKM_IVMODE);
226 spin_unlock(&lock->spinlock);
227 spin_unlock(&res->spinlock);
228 wake_up(&res->wq);
229
230 /* let the caller's final dlm_lock_put handle the actual kfree */
231 if (actions & DLM_UNLOCK_FREE_LOCK) {
232 /* this should always be coupled with list removal */
233 BUG_ON(!(actions & DLM_UNLOCK_REMOVE_LOCK));
234 mlog(0, "lock %"MLFu64" should be gone now! refs=%d\n",
235 lock->ml.cookie, atomic_read(&lock->lock_refs.refcount)-1);
236 dlm_lock_put(lock);
237 }
238 if (actions & DLM_UNLOCK_CALL_AST)
239 *call_ast = 1;
240
241 /* if cancel or unlock succeeded, lvb work is done */
242 if (status == DLM_NORMAL)
243 lksb->flags &= ~(DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB);
244
245 return status;
246}
247
248void dlm_commit_pending_unlock(struct dlm_lock_resource *res,
249 struct dlm_lock *lock)
250{
251 /* leave DLM_LKSB_PUT_LVB on the lksb so any final
252 * update of the lvb will be sent to the new master */
253 list_del_init(&lock->list);
254}
255
256void dlm_commit_pending_cancel(struct dlm_lock_resource *res,
257 struct dlm_lock *lock)
258{
259 list_del_init(&lock->list);
260 list_add_tail(&lock->list, &res->granted);
261 lock->ml.convert_type = LKM_IVMODE;
262}
263
264
265static inline enum dlm_status dlmunlock_master(struct dlm_ctxt *dlm,
266 struct dlm_lock_resource *res,
267 struct dlm_lock *lock,
268 struct dlm_lockstatus *lksb,
269 int flags,
270 int *call_ast)
271{
272 return dlmunlock_common(dlm, res, lock, lksb, flags, call_ast, 1);
273}
274
275static inline enum dlm_status dlmunlock_remote(struct dlm_ctxt *dlm,
276 struct dlm_lock_resource *res,
277 struct dlm_lock *lock,
278 struct dlm_lockstatus *lksb,
279 int flags, int *call_ast)
280{
281 return dlmunlock_common(dlm, res, lock, lksb, flags, call_ast, 0);
282}
283
284/*
285 * locking:
286 * caller needs: none
287 * taken: none
288 * held on exit: none
289 * returns: DLM_NORMAL, DLM_NOLOCKMGR, status from network
290 */
291static enum dlm_status dlm_send_remote_unlock_request(struct dlm_ctxt *dlm,
292 struct dlm_lock_resource *res,
293 struct dlm_lock *lock,
294 struct dlm_lockstatus *lksb,
295 int flags,
296 u8 owner)
297{
298 struct dlm_unlock_lock unlock;
299 int tmpret;
300 enum dlm_status ret;
301 int status = 0;
302 struct kvec vec[2];
303 size_t veclen = 1;
304
305 mlog_entry("%.*s\n", res->lockname.len, res->lockname.name);
306
307 memset(&unlock, 0, sizeof(unlock));
308 unlock.node_idx = dlm->node_num;
309 unlock.flags = cpu_to_be32(flags);
310 unlock.cookie = lock->ml.cookie;
311 unlock.namelen = res->lockname.len;
312 memcpy(unlock.name, res->lockname.name, unlock.namelen);
313
314 vec[0].iov_len = sizeof(struct dlm_unlock_lock);
315 vec[0].iov_base = &unlock;
316
317 if (flags & LKM_PUT_LVB) {
318 /* extra data to send if we are updating lvb */
319 vec[1].iov_len = DLM_LVB_LEN;
320 vec[1].iov_base = lock->lksb->lvb;
321 veclen++;
322 }
323
324 tmpret = o2net_send_message_vec(DLM_UNLOCK_LOCK_MSG, dlm->key,
325 vec, veclen, owner, &status);
326 if (tmpret >= 0) {
327 // successfully sent and received
328 if (status == DLM_CANCELGRANT)
329 ret = DLM_NORMAL;
330 else if (status == DLM_FORWARD) {
331 mlog(0, "master was in-progress. retry\n");
332 ret = DLM_FORWARD;
333 } else
334 ret = status;
335 lksb->status = status;
336 } else {
337 mlog_errno(tmpret);
338 if (dlm_is_host_down(tmpret)) {
339 /* NOTE: this seems strange, but it is what we want.
340 * when the master goes down during a cancel or
341 * unlock, the recovery code completes the operation
342 * as if the master had not died, then passes the
343 * updated state to the recovery master. this thread
344 * just needs to finish out the operation and call
345 * the unlockast. */
346 ret = DLM_NORMAL;
347 } else {
348 /* something bad. this will BUG in ocfs2 */
349 ret = dlm_err_to_dlm_status(tmpret);
350 }
351 lksb->status = ret;
352 }
353
354 return ret;
355}
356
357/*
358 * locking:
359 * caller needs: none
360 * taken: takes and drops res->spinlock
361 * held on exit: none
362 * returns: DLM_NORMAL, DLM_BADARGS, DLM_IVLOCKID,
363 * return value from dlmunlock_master
364 */
365int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data)
366{
367 struct dlm_ctxt *dlm = data;
368 struct dlm_unlock_lock *unlock = (struct dlm_unlock_lock *)msg->buf;
369 struct dlm_lock_resource *res = NULL;
370 struct list_head *iter;
371 struct dlm_lock *lock = NULL;
372 enum dlm_status status = DLM_NORMAL;
373 int found = 0, i;
374 struct dlm_lockstatus *lksb = NULL;
375 int ignore;
376 u32 flags;
377 struct list_head *queue;
378
379 flags = be32_to_cpu(unlock->flags);
380
381 if (flags & LKM_GET_LVB) {
382 mlog(ML_ERROR, "bad args! GET_LVB specified on unlock!\n");
383 return DLM_BADARGS;
384 }
385
386 if ((flags & (LKM_PUT_LVB|LKM_CANCEL)) == (LKM_PUT_LVB|LKM_CANCEL)) {
387 mlog(ML_ERROR, "bad args! cannot modify lvb on a CANCEL "
388 "request!\n");
389 return DLM_BADARGS;
390 }
391
392 if (unlock->namelen > DLM_LOCKID_NAME_MAX) {
393 mlog(ML_ERROR, "Invalid name length in unlock handler!\n");
394 return DLM_IVBUFLEN;
395 }
396
397 if (!dlm_grab(dlm))
398 return DLM_REJECTED;
399
400 mlog_bug_on_msg(!dlm_domain_fully_joined(dlm),
401 "Domain %s not fully joined!\n", dlm->name);
402
403 mlog(0, "lvb: %s\n", flags & LKM_PUT_LVB ? "put lvb" : "none");
404
405 res = dlm_lookup_lockres(dlm, unlock->name, unlock->namelen);
406 if (!res) {
407 /* We assume here that a no lock resource simply means
408 * it was migrated away and destroyed before the other
409 * node could detect it. */
410 mlog(0, "returning DLM_FORWARD -- res no longer exists\n");
411 status = DLM_FORWARD;
412 goto not_found;
413 }
414
415 queue=&res->granted;
416 found = 0;
417 spin_lock(&res->spinlock);
418 if (res->state & DLM_LOCK_RES_RECOVERING) {
419 spin_unlock(&res->spinlock);
420 mlog(0, "returning DLM_RECOVERING\n");
421 status = DLM_RECOVERING;
422 goto leave;
423 }
424
425 if (res->state & DLM_LOCK_RES_MIGRATING) {
426 spin_unlock(&res->spinlock);
427 mlog(0, "returning DLM_MIGRATING\n");
428 status = DLM_MIGRATING;
429 goto leave;
430 }
431
432 if (res->owner != dlm->node_num) {
433 spin_unlock(&res->spinlock);
434 mlog(0, "returning DLM_FORWARD -- not master\n");
435 status = DLM_FORWARD;
436 goto leave;
437 }
438
439 for (i=0; i<3; i++) {
440 list_for_each(iter, queue) {
441 lock = list_entry(iter, struct dlm_lock, list);
442 if (lock->ml.cookie == unlock->cookie &&
443 lock->ml.node == unlock->node_idx) {
444 dlm_lock_get(lock);
445 found = 1;
446 break;
447 }
448 }
449 if (found)
450 break;
451 /* scan granted -> converting -> blocked queues */
452 queue++;
453 }
454 spin_unlock(&res->spinlock);
455 if (!found) {
456 status = DLM_IVLOCKID;
457 goto not_found;
458 }
459
460 /* lock was found on queue */
461 lksb = lock->lksb;
462 /* unlockast only called on originating node */
463 if (flags & LKM_PUT_LVB) {
464 lksb->flags |= DLM_LKSB_PUT_LVB;
465 memcpy(&lksb->lvb[0], &unlock->lvb[0], DLM_LVB_LEN);
466 }
467
468 /* if this is in-progress, propagate the DLM_FORWARD
469 * all the way back out */
470 status = dlmunlock_master(dlm, res, lock, lksb, flags, &ignore);
471 if (status == DLM_FORWARD)
472 mlog(0, "lockres is in progress\n");
473
474 if (flags & LKM_PUT_LVB)
475 lksb->flags &= ~DLM_LKSB_PUT_LVB;
476
477 dlm_lockres_calc_usage(dlm, res);
478 dlm_kick_thread(dlm, res);
479
480not_found:
481 if (!found)
482 mlog(ML_ERROR, "failed to find lock to unlock! "
483 "cookie=%"MLFu64"\n",
484 unlock->cookie);
485 else {
486 /* send the lksb->status back to the other node */
487 status = lksb->status;
488 dlm_lock_put(lock);
489 }
490
491leave:
492 if (res)
493 dlm_lockres_put(res);
494
495 dlm_put(dlm);
496
497 return status;
498}
499
500
501static enum dlm_status dlm_get_cancel_actions(struct dlm_ctxt *dlm,
502 struct dlm_lock_resource *res,
503 struct dlm_lock *lock,
504 struct dlm_lockstatus *lksb,
505 int *actions)
506{
507 enum dlm_status status;
508
509 if (dlm_lock_on_list(&res->blocked, lock)) {
510 /* cancel this outright */
511 lksb->status = DLM_NORMAL;
512 status = DLM_NORMAL;
513 *actions = (DLM_UNLOCK_CALL_AST |
514 DLM_UNLOCK_REMOVE_LOCK);
515 } else if (dlm_lock_on_list(&res->converting, lock)) {
516 /* cancel the request, put back on granted */
517 lksb->status = DLM_NORMAL;
518 status = DLM_NORMAL;
519 *actions = (DLM_UNLOCK_CALL_AST |
520 DLM_UNLOCK_REMOVE_LOCK |
521 DLM_UNLOCK_REGRANT_LOCK |
522 DLM_UNLOCK_CLEAR_CONVERT_TYPE);
523 } else if (dlm_lock_on_list(&res->granted, lock)) {
524 /* too late, already granted. DLM_CANCELGRANT */
525 lksb->status = DLM_CANCELGRANT;
526 status = DLM_NORMAL;
527 *actions = DLM_UNLOCK_CALL_AST;
528 } else {
529 mlog(ML_ERROR, "lock to cancel is not on any list!\n");
530 lksb->status = DLM_IVLOCKID;
531 status = DLM_IVLOCKID;
532 *actions = 0;
533 }
534 return status;
535}
536
537static enum dlm_status dlm_get_unlock_actions(struct dlm_ctxt *dlm,
538 struct dlm_lock_resource *res,
539 struct dlm_lock *lock,
540 struct dlm_lockstatus *lksb,
541 int *actions)
542{
543 enum dlm_status status;
544
545 /* unlock request */
546 if (!dlm_lock_on_list(&res->granted, lock)) {
547 lksb->status = DLM_DENIED;
548 status = DLM_DENIED;
549 dlm_error(status);
550 *actions = 0;
551 } else {
552 /* unlock granted lock */
553 lksb->status = DLM_NORMAL;
554 status = DLM_NORMAL;
555 *actions = (DLM_UNLOCK_FREE_LOCK |
556 DLM_UNLOCK_CALL_AST |
557 DLM_UNLOCK_REMOVE_LOCK);
558 }
559 return status;
560}
561
562/* there seems to be no point in doing this async
563 * since (even for the remote case) there is really
564 * no work to queue up... so just do it and fire the
565 * unlockast by hand when done... */
566enum dlm_status dlmunlock(struct dlm_ctxt *dlm, struct dlm_lockstatus *lksb,
567 int flags, dlm_astunlockfunc_t *unlockast, void *data)
568{
569 enum dlm_status status;
570 struct dlm_lock_resource *res;
571 struct dlm_lock *lock = NULL;
572 int call_ast, is_master;
573
574 mlog_entry_void();
575
576 if (!lksb) {
577 dlm_error(DLM_BADARGS);
578 return DLM_BADARGS;
579 }
580
581 if (flags & ~(LKM_CANCEL | LKM_VALBLK | LKM_INVVALBLK)) {
582 dlm_error(DLM_BADPARAM);
583 return DLM_BADPARAM;
584 }
585
586 if ((flags & (LKM_VALBLK | LKM_CANCEL)) == (LKM_VALBLK | LKM_CANCEL)) {
587 mlog(0, "VALBLK given with CANCEL: ignoring VALBLK\n");
588 flags &= ~LKM_VALBLK;
589 }
590
591 if (!lksb->lockid || !lksb->lockid->lockres) {
592 dlm_error(DLM_BADPARAM);
593 return DLM_BADPARAM;
594 }
595
596 lock = lksb->lockid;
597 BUG_ON(!lock);
598 dlm_lock_get(lock);
599
600 res = lock->lockres;
601 BUG_ON(!res);
602 dlm_lockres_get(res);
603retry:
604 call_ast = 0;
605 /* need to retry up here because owner may have changed */
606 mlog(0, "lock=%p res=%p\n", lock, res);
607
608 spin_lock(&res->spinlock);
609 is_master = (res->owner == dlm->node_num);
610 spin_unlock(&res->spinlock);
611
612 if (is_master) {
613 status = dlmunlock_master(dlm, res, lock, lksb, flags,
614 &call_ast);
615 mlog(0, "done calling dlmunlock_master: returned %d, "
616 "call_ast is %d\n", status, call_ast);
617 } else {
618 status = dlmunlock_remote(dlm, res, lock, lksb, flags,
619 &call_ast);
620 mlog(0, "done calling dlmunlock_remote: returned %d, "
621 "call_ast is %d\n", status, call_ast);
622 }
623
624 if (status == DLM_RECOVERING ||
625 status == DLM_MIGRATING ||
626 status == DLM_FORWARD) {
627 /* We want to go away for a tiny bit to allow recovery
628 * / migration to complete on this resource. I don't
629 * know of any wait queue we could sleep on as this
630 * may be happening on another node. Perhaps the
631 * proper solution is to queue up requests on the
632 * other end? */
633
634 /* do we want to yield(); ?? */
635 msleep(50);
636
637 mlog(0, "retrying unlock due to pending recovery/"
638 "migration/in-progress\n");
639 goto retry;
640 }
641
642 if (call_ast) {
643 mlog(0, "calling unlockast(%p, %d)\n", data, lksb->status);
644 if (is_master) {
645 /* it is possible that there is one last bast
646 * pending. make sure it is flushed, then
647 * call the unlockast.
648 * not an issue if this is a mastered remotely,
649 * since this lock has been removed from the
650 * lockres queues and cannot be found. */
651 dlm_kick_thread(dlm, NULL);
652 wait_event(dlm->ast_wq,
653 dlm_lock_basts_flushed(dlm, lock));
654 }
655 (*unlockast)(data, lksb->status);
656 }
657
658 if (status == DLM_NORMAL) {
659 mlog(0, "kicking the thread\n");
660 dlm_kick_thread(dlm, res);
661 } else
662 dlm_error(status);
663
664 dlm_lockres_calc_usage(dlm, res);
665 dlm_lockres_put(res);
666 dlm_lock_put(lock);
667
668 mlog(0, "returning status=%d!\n", status);
669 return status;
670}
671EXPORT_SYMBOL_GPL(dlmunlock);
672
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-28 04:28:06 -0500