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6714d8e8 KH |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * dlmconvert.c | |
5 | * | |
6 | * underlying calls for lock conversion | |
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> | |
6714d8e8 KH |
33 | #include <linux/init.h> |
34 | #include <linux/sysctl.h> | |
35 | #include <linux/random.h> | |
36 | #include <linux/blkdev.h> | |
37 | #include <linux/socket.h> | |
38 | #include <linux/inet.h> | |
39 | #include <linux/spinlock.h> | |
40 | ||
41 | ||
42 | #include "cluster/heartbeat.h" | |
43 | #include "cluster/nodemanager.h" | |
44 | #include "cluster/tcp.h" | |
45 | ||
46 | #include "dlmapi.h" | |
47 | #include "dlmcommon.h" | |
48 | ||
49 | #include "dlmconvert.h" | |
50 | ||
51 | #define MLOG_MASK_PREFIX ML_DLM | |
52 | #include "cluster/masklog.h" | |
53 | ||
54 | /* NOTE: __dlmconvert_master is the only function in here that | |
55 | * needs a spinlock held on entry (res->spinlock) and it is the | |
56 | * only one that holds a lock on exit (res->spinlock). | |
57 | * All other functions in here need no locks and drop all of | |
58 | * the locks that they acquire. */ | |
59 | static enum dlm_status __dlmconvert_master(struct dlm_ctxt *dlm, | |
60 | struct dlm_lock_resource *res, | |
61 | struct dlm_lock *lock, int flags, | |
62 | int type, int *call_ast, | |
63 | int *kick_thread); | |
64 | static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm, | |
65 | struct dlm_lock_resource *res, | |
66 | struct dlm_lock *lock, int flags, int type); | |
67 | ||
68 | /* | |
69 | * this is only called directly by dlmlock(), and only when the | |
70 | * local node is the owner of the lockres | |
71 | * locking: | |
72 | * caller needs: none | |
73 | * taken: takes and drops res->spinlock | |
74 | * held on exit: none | |
75 | * returns: see __dlmconvert_master | |
76 | */ | |
77 | enum dlm_status dlmconvert_master(struct dlm_ctxt *dlm, | |
78 | struct dlm_lock_resource *res, | |
79 | struct dlm_lock *lock, int flags, int type) | |
80 | { | |
81 | int call_ast = 0, kick_thread = 0; | |
82 | enum dlm_status status; | |
83 | ||
84 | spin_lock(&res->spinlock); | |
85 | /* we are not in a network handler, this is fine */ | |
86 | __dlm_wait_on_lockres(res); | |
87 | __dlm_lockres_reserve_ast(res); | |
88 | res->state |= DLM_LOCK_RES_IN_PROGRESS; | |
89 | ||
90 | status = __dlmconvert_master(dlm, res, lock, flags, type, | |
91 | &call_ast, &kick_thread); | |
92 | ||
93 | res->state &= ~DLM_LOCK_RES_IN_PROGRESS; | |
94 | spin_unlock(&res->spinlock); | |
95 | wake_up(&res->wq); | |
96 | if (status != DLM_NORMAL && status != DLM_NOTQUEUED) | |
97 | dlm_error(status); | |
98 | ||
99 | /* either queue the ast or release it */ | |
100 | if (call_ast) | |
101 | dlm_queue_ast(dlm, lock); | |
102 | else | |
103 | dlm_lockres_release_ast(dlm, res); | |
104 | ||
105 | if (kick_thread) | |
106 | dlm_kick_thread(dlm, res); | |
107 | ||
108 | return status; | |
109 | } | |
110 | ||
111 | /* performs lock conversion at the lockres master site | |
112 | * locking: | |
113 | * caller needs: res->spinlock | |
114 | * taken: takes and drops lock->spinlock | |
115 | * held on exit: res->spinlock | |
116 | * returns: DLM_NORMAL, DLM_NOTQUEUED, DLM_DENIED | |
117 | * call_ast: whether ast should be called for this lock | |
118 | * kick_thread: whether dlm_kick_thread should be called | |
119 | */ | |
120 | static enum dlm_status __dlmconvert_master(struct dlm_ctxt *dlm, | |
121 | struct dlm_lock_resource *res, | |
122 | struct dlm_lock *lock, int flags, | |
123 | int type, int *call_ast, | |
124 | int *kick_thread) | |
125 | { | |
126 | enum dlm_status status = DLM_NORMAL; | |
127 | struct list_head *iter; | |
128 | struct dlm_lock *tmplock=NULL; | |
129 | ||
130 | assert_spin_locked(&res->spinlock); | |
131 | ||
132 | mlog_entry("type=%d, convert_type=%d, new convert_type=%d\n", | |
133 | lock->ml.type, lock->ml.convert_type, type); | |
134 | ||
135 | spin_lock(&lock->spinlock); | |
136 | ||
137 | /* already converting? */ | |
138 | if (lock->ml.convert_type != LKM_IVMODE) { | |
139 | mlog(ML_ERROR, "attempted to convert a lock with a lock " | |
140 | "conversion pending\n"); | |
141 | status = DLM_DENIED; | |
142 | goto unlock_exit; | |
143 | } | |
144 | ||
145 | /* must be on grant queue to convert */ | |
146 | if (!dlm_lock_on_list(&res->granted, lock)) { | |
147 | mlog(ML_ERROR, "attempted to convert a lock not on grant " | |
148 | "queue\n"); | |
149 | status = DLM_DENIED; | |
150 | goto unlock_exit; | |
151 | } | |
152 | ||
153 | if (flags & LKM_VALBLK) { | |
154 | switch (lock->ml.type) { | |
155 | case LKM_EXMODE: | |
156 | /* EX + LKM_VALBLK + convert == set lvb */ | |
157 | mlog(0, "will set lvb: converting %s->%s\n", | |
158 | dlm_lock_mode_name(lock->ml.type), | |
159 | dlm_lock_mode_name(type)); | |
160 | lock->lksb->flags |= DLM_LKSB_PUT_LVB; | |
161 | break; | |
162 | case LKM_PRMODE: | |
163 | case LKM_NLMODE: | |
164 | /* refetch if new level is not NL */ | |
165 | if (type > LKM_NLMODE) { | |
166 | mlog(0, "will fetch new value into " | |
167 | "lvb: converting %s->%s\n", | |
168 | dlm_lock_mode_name(lock->ml.type), | |
169 | dlm_lock_mode_name(type)); | |
170 | lock->lksb->flags |= DLM_LKSB_GET_LVB; | |
171 | } else { | |
172 | mlog(0, "will NOT fetch new value " | |
173 | "into lvb: converting %s->%s\n", | |
174 | dlm_lock_mode_name(lock->ml.type), | |
175 | dlm_lock_mode_name(type)); | |
176 | flags &= ~(LKM_VALBLK); | |
177 | } | |
178 | break; | |
179 | } | |
180 | } | |
181 | ||
182 | ||
183 | /* in-place downconvert? */ | |
184 | if (type <= lock->ml.type) | |
185 | goto grant; | |
186 | ||
187 | /* upconvert from here on */ | |
188 | status = DLM_NORMAL; | |
189 | list_for_each(iter, &res->granted) { | |
190 | tmplock = list_entry(iter, struct dlm_lock, list); | |
191 | if (tmplock == lock) | |
192 | continue; | |
193 | if (!dlm_lock_compatible(tmplock->ml.type, type)) | |
194 | goto switch_queues; | |
195 | } | |
196 | ||
197 | list_for_each(iter, &res->converting) { | |
198 | tmplock = list_entry(iter, struct dlm_lock, list); | |
199 | if (!dlm_lock_compatible(tmplock->ml.type, type)) | |
200 | goto switch_queues; | |
201 | /* existing conversion requests take precedence */ | |
202 | if (!dlm_lock_compatible(tmplock->ml.convert_type, type)) | |
203 | goto switch_queues; | |
204 | } | |
205 | ||
206 | /* fall thru to grant */ | |
207 | ||
208 | grant: | |
209 | mlog(0, "res %.*s, granting %s lock\n", res->lockname.len, | |
210 | res->lockname.name, dlm_lock_mode_name(type)); | |
211 | /* immediately grant the new lock type */ | |
212 | lock->lksb->status = DLM_NORMAL; | |
213 | if (lock->ml.node == dlm->node_num) | |
214 | mlog(0, "doing in-place convert for nonlocal lock\n"); | |
215 | lock->ml.type = type; | |
c0a8520c MF |
216 | if (lock->lksb->flags & DLM_LKSB_PUT_LVB) |
217 | memcpy(res->lvb, lock->lksb->lvb, DLM_LVB_LEN); | |
218 | ||
6714d8e8 KH |
219 | status = DLM_NORMAL; |
220 | *call_ast = 1; | |
221 | goto unlock_exit; | |
222 | ||
223 | switch_queues: | |
224 | if (flags & LKM_NOQUEUE) { | |
225 | mlog(0, "failed to convert NOQUEUE lock %.*s from " | |
226 | "%d to %d...\n", res->lockname.len, res->lockname.name, | |
227 | lock->ml.type, type); | |
228 | status = DLM_NOTQUEUED; | |
229 | goto unlock_exit; | |
230 | } | |
231 | mlog(0, "res %.*s, queueing...\n", res->lockname.len, | |
232 | res->lockname.name); | |
233 | ||
234 | lock->ml.convert_type = type; | |
235 | /* do not alter lock refcount. switching lists. */ | |
f116629d | 236 | list_move_tail(&lock->list, &res->converting); |
6714d8e8 KH |
237 | |
238 | unlock_exit: | |
239 | spin_unlock(&lock->spinlock); | |
240 | if (status == DLM_DENIED) { | |
241 | __dlm_print_one_lock_resource(res); | |
242 | } | |
243 | if (status == DLM_NORMAL) | |
244 | *kick_thread = 1; | |
245 | return status; | |
246 | } | |
247 | ||
248 | void dlm_revert_pending_convert(struct dlm_lock_resource *res, | |
249 | struct dlm_lock *lock) | |
250 | { | |
251 | /* do not alter lock refcount. switching lists. */ | |
f116629d | 252 | list_move_tail(&lock->list, &res->granted); |
6714d8e8 KH |
253 | lock->ml.convert_type = LKM_IVMODE; |
254 | lock->lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB); | |
255 | } | |
256 | ||
257 | /* messages the master site to do lock conversion | |
258 | * locking: | |
259 | * caller needs: none | |
260 | * taken: takes and drops res->spinlock, uses DLM_LOCK_RES_IN_PROGRESS | |
261 | * held on exit: none | |
262 | * returns: DLM_NORMAL, DLM_RECOVERING, status from remote node | |
263 | */ | |
264 | enum dlm_status dlmconvert_remote(struct dlm_ctxt *dlm, | |
265 | struct dlm_lock_resource *res, | |
266 | struct dlm_lock *lock, int flags, int type) | |
267 | { | |
268 | enum dlm_status status; | |
269 | ||
270 | mlog(0, "type=%d, convert_type=%d, busy=%d\n", lock->ml.type, | |
271 | lock->ml.convert_type, res->state & DLM_LOCK_RES_IN_PROGRESS); | |
272 | ||
273 | spin_lock(&res->spinlock); | |
274 | if (res->state & DLM_LOCK_RES_RECOVERING) { | |
275 | mlog(0, "bailing out early since res is RECOVERING " | |
276 | "on secondary queue\n"); | |
277 | /* __dlm_print_one_lock_resource(res); */ | |
278 | status = DLM_RECOVERING; | |
279 | goto bail; | |
280 | } | |
281 | /* will exit this call with spinlock held */ | |
282 | __dlm_wait_on_lockres(res); | |
283 | ||
284 | if (lock->ml.convert_type != LKM_IVMODE) { | |
285 | __dlm_print_one_lock_resource(res); | |
286 | mlog(ML_ERROR, "converting a remote lock that is already " | |
29004858 | 287 | "converting! (cookie=%u:%llu, conv=%d)\n", |
74aa2585 KH |
288 | dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), |
289 | dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), | |
29004858 | 290 | lock->ml.convert_type); |
6714d8e8 KH |
291 | status = DLM_DENIED; |
292 | goto bail; | |
293 | } | |
294 | res->state |= DLM_LOCK_RES_IN_PROGRESS; | |
295 | /* move lock to local convert queue */ | |
296 | /* do not alter lock refcount. switching lists. */ | |
f116629d | 297 | list_move_tail(&lock->list, &res->converting); |
6714d8e8 KH |
298 | lock->convert_pending = 1; |
299 | lock->ml.convert_type = type; | |
300 | ||
301 | if (flags & LKM_VALBLK) { | |
302 | if (lock->ml.type == LKM_EXMODE) { | |
303 | flags |= LKM_PUT_LVB; | |
304 | lock->lksb->flags |= DLM_LKSB_PUT_LVB; | |
305 | } else { | |
306 | if (lock->ml.convert_type == LKM_NLMODE) | |
307 | flags &= ~LKM_VALBLK; | |
308 | else { | |
309 | flags |= LKM_GET_LVB; | |
310 | lock->lksb->flags |= DLM_LKSB_GET_LVB; | |
311 | } | |
312 | } | |
313 | } | |
314 | spin_unlock(&res->spinlock); | |
315 | ||
316 | /* no locks held here. | |
317 | * need to wait for a reply as to whether it got queued or not. */ | |
318 | status = dlm_send_remote_convert_request(dlm, res, lock, flags, type); | |
319 | ||
320 | spin_lock(&res->spinlock); | |
321 | res->state &= ~DLM_LOCK_RES_IN_PROGRESS; | |
322 | lock->convert_pending = 0; | |
323 | /* if it failed, move it back to granted queue */ | |
324 | if (status != DLM_NORMAL) { | |
325 | if (status != DLM_NOTQUEUED) | |
326 | dlm_error(status); | |
327 | dlm_revert_pending_convert(res, lock); | |
328 | } | |
329 | bail: | |
330 | spin_unlock(&res->spinlock); | |
331 | ||
332 | /* TODO: should this be a wake_one? */ | |
333 | /* wake up any IN_PROGRESS waiters */ | |
334 | wake_up(&res->wq); | |
335 | ||
336 | return status; | |
337 | } | |
338 | ||
339 | /* sends DLM_CONVERT_LOCK_MSG to master site | |
340 | * locking: | |
341 | * caller needs: none | |
342 | * taken: none | |
343 | * held on exit: none | |
344 | * returns: DLM_NOLOCKMGR, status from remote node | |
345 | */ | |
346 | static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm, | |
347 | struct dlm_lock_resource *res, | |
348 | struct dlm_lock *lock, int flags, int type) | |
349 | { | |
350 | struct dlm_convert_lock convert; | |
351 | int tmpret; | |
352 | enum dlm_status ret; | |
353 | int status = 0; | |
354 | struct kvec vec[2]; | |
355 | size_t veclen = 1; | |
356 | ||
357 | mlog_entry("%.*s\n", res->lockname.len, res->lockname.name); | |
358 | ||
359 | memset(&convert, 0, sizeof(struct dlm_convert_lock)); | |
360 | convert.node_idx = dlm->node_num; | |
361 | convert.requested_type = type; | |
362 | convert.cookie = lock->ml.cookie; | |
363 | convert.namelen = res->lockname.len; | |
364 | convert.flags = cpu_to_be32(flags); | |
365 | memcpy(convert.name, res->lockname.name, convert.namelen); | |
366 | ||
367 | vec[0].iov_len = sizeof(struct dlm_convert_lock); | |
368 | vec[0].iov_base = &convert; | |
369 | ||
370 | if (flags & LKM_PUT_LVB) { | |
371 | /* extra data to send if we are updating lvb */ | |
372 | vec[1].iov_len = DLM_LVB_LEN; | |
373 | vec[1].iov_base = lock->lksb->lvb; | |
374 | veclen++; | |
375 | } | |
376 | ||
377 | tmpret = o2net_send_message_vec(DLM_CONVERT_LOCK_MSG, dlm->key, | |
378 | vec, veclen, res->owner, &status); | |
379 | if (tmpret >= 0) { | |
380 | // successfully sent and received | |
381 | ret = status; // this is already a dlm_status | |
382 | if (ret == DLM_RECOVERING) { | |
383 | mlog(0, "node %u returned DLM_RECOVERING from convert " | |
384 | "message!\n", res->owner); | |
385 | } else if (ret == DLM_MIGRATING) { | |
386 | mlog(0, "node %u returned DLM_MIGRATING from convert " | |
387 | "message!\n", res->owner); | |
388 | } else if (ret == DLM_FORWARD) { | |
389 | mlog(0, "node %u returned DLM_FORWARD from convert " | |
390 | "message!\n", res->owner); | |
391 | } else if (ret != DLM_NORMAL && ret != DLM_NOTQUEUED) | |
392 | dlm_error(ret); | |
393 | } else { | |
394 | mlog_errno(tmpret); | |
395 | if (dlm_is_host_down(tmpret)) { | |
44465a7d KH |
396 | /* instead of logging the same network error over |
397 | * and over, sleep here and wait for the heartbeat | |
398 | * to notice the node is dead. times out after 5s. */ | |
2bd63216 | 399 | dlm_wait_for_node_death(dlm, res->owner, |
44465a7d | 400 | DLM_NODE_DEATH_WAIT_MAX); |
6714d8e8 KH |
401 | ret = DLM_RECOVERING; |
402 | mlog(0, "node %u died so returning DLM_RECOVERING " | |
403 | "from convert message!\n", res->owner); | |
404 | } else { | |
405 | ret = dlm_err_to_dlm_status(tmpret); | |
406 | } | |
407 | } | |
408 | ||
409 | return ret; | |
410 | } | |
411 | ||
412 | /* handler for DLM_CONVERT_LOCK_MSG on master site | |
413 | * locking: | |
414 | * caller needs: none | |
415 | * taken: takes and drop res->spinlock | |
416 | * held on exit: none | |
417 | * returns: DLM_NORMAL, DLM_IVLOCKID, DLM_BADARGS, | |
418 | * status from __dlmconvert_master | |
419 | */ | |
d74c9803 KH |
420 | int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data, |
421 | void **ret_data) | |
6714d8e8 KH |
422 | { |
423 | struct dlm_ctxt *dlm = data; | |
424 | struct dlm_convert_lock *cnv = (struct dlm_convert_lock *)msg->buf; | |
425 | struct dlm_lock_resource *res = NULL; | |
426 | struct list_head *iter; | |
427 | struct dlm_lock *lock = NULL; | |
428 | struct dlm_lockstatus *lksb; | |
429 | enum dlm_status status = DLM_NORMAL; | |
430 | u32 flags; | |
a6fa3640 | 431 | int call_ast = 0, kick_thread = 0, ast_reserved = 0, wake = 0; |
6714d8e8 KH |
432 | |
433 | if (!dlm_grab(dlm)) { | |
434 | dlm_error(DLM_REJECTED); | |
435 | return DLM_REJECTED; | |
436 | } | |
437 | ||
438 | mlog_bug_on_msg(!dlm_domain_fully_joined(dlm), | |
439 | "Domain %s not fully joined!\n", dlm->name); | |
440 | ||
441 | if (cnv->namelen > DLM_LOCKID_NAME_MAX) { | |
442 | status = DLM_IVBUFLEN; | |
443 | dlm_error(status); | |
444 | goto leave; | |
445 | } | |
446 | ||
447 | flags = be32_to_cpu(cnv->flags); | |
448 | ||
449 | if ((flags & (LKM_PUT_LVB|LKM_GET_LVB)) == | |
450 | (LKM_PUT_LVB|LKM_GET_LVB)) { | |
451 | mlog(ML_ERROR, "both PUT and GET lvb specified\n"); | |
452 | status = DLM_BADARGS; | |
453 | goto leave; | |
454 | } | |
455 | ||
456 | mlog(0, "lvb: %s\n", flags & LKM_PUT_LVB ? "put lvb" : | |
457 | (flags & LKM_GET_LVB ? "get lvb" : "none")); | |
458 | ||
459 | status = DLM_IVLOCKID; | |
460 | res = dlm_lookup_lockres(dlm, cnv->name, cnv->namelen); | |
461 | if (!res) { | |
462 | dlm_error(status); | |
463 | goto leave; | |
464 | } | |
465 | ||
466 | spin_lock(&res->spinlock); | |
b220532a KH |
467 | status = __dlm_lockres_state_to_status(res); |
468 | if (status != DLM_NORMAL) { | |
469 | spin_unlock(&res->spinlock); | |
470 | dlm_error(status); | |
471 | goto leave; | |
472 | } | |
6714d8e8 KH |
473 | list_for_each(iter, &res->granted) { |
474 | lock = list_entry(iter, struct dlm_lock, list); | |
475 | if (lock->ml.cookie == cnv->cookie && | |
476 | lock->ml.node == cnv->node_idx) { | |
477 | dlm_lock_get(lock); | |
478 | break; | |
479 | } | |
480 | lock = NULL; | |
481 | } | |
482 | spin_unlock(&res->spinlock); | |
483 | if (!lock) { | |
484 | status = DLM_IVLOCKID; | |
90aaaf1c KH |
485 | mlog(ML_ERROR, "did not find lock to convert on grant queue! " |
486 | "cookie=%u:%llu\n", | |
74aa2585 KH |
487 | dlm_get_lock_cookie_node(be64_to_cpu(cnv->cookie)), |
488 | dlm_get_lock_cookie_seq(be64_to_cpu(cnv->cookie))); | |
2af37ce8 | 489 | dlm_print_one_lock_resource(res); |
6714d8e8 KH |
490 | goto leave; |
491 | } | |
492 | ||
493 | /* found the lock */ | |
494 | lksb = lock->lksb; | |
495 | ||
496 | /* see if caller needed to get/put lvb */ | |
497 | if (flags & LKM_PUT_LVB) { | |
498 | BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB)); | |
499 | lksb->flags |= DLM_LKSB_PUT_LVB; | |
500 | memcpy(&lksb->lvb[0], &cnv->lvb[0], DLM_LVB_LEN); | |
501 | } else if (flags & LKM_GET_LVB) { | |
502 | BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB)); | |
503 | lksb->flags |= DLM_LKSB_GET_LVB; | |
504 | } | |
505 | ||
506 | spin_lock(&res->spinlock); | |
507 | status = __dlm_lockres_state_to_status(res); | |
508 | if (status == DLM_NORMAL) { | |
509 | __dlm_lockres_reserve_ast(res); | |
e2b5e450 | 510 | ast_reserved = 1; |
6714d8e8 KH |
511 | res->state |= DLM_LOCK_RES_IN_PROGRESS; |
512 | status = __dlmconvert_master(dlm, res, lock, flags, | |
513 | cnv->requested_type, | |
514 | &call_ast, &kick_thread); | |
515 | res->state &= ~DLM_LOCK_RES_IN_PROGRESS; | |
a6fa3640 | 516 | wake = 1; |
6714d8e8 KH |
517 | } |
518 | spin_unlock(&res->spinlock); | |
a6fa3640 KH |
519 | if (wake) |
520 | wake_up(&res->wq); | |
6714d8e8 KH |
521 | |
522 | if (status != DLM_NORMAL) { | |
523 | if (status != DLM_NOTQUEUED) | |
524 | dlm_error(status); | |
525 | lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB); | |
526 | } | |
527 | ||
528 | leave: | |
90aaaf1c | 529 | if (lock) |
6714d8e8 KH |
530 | dlm_lock_put(lock); |
531 | ||
e2b5e450 | 532 | /* either queue the ast or release it, if reserved */ |
6714d8e8 KH |
533 | if (call_ast) |
534 | dlm_queue_ast(dlm, lock); | |
e2b5e450 | 535 | else if (ast_reserved) |
6714d8e8 KH |
536 | dlm_lockres_release_ast(dlm, res); |
537 | ||
538 | if (kick_thread) | |
539 | dlm_kick_thread(dlm, res); | |
540 | ||
541 | if (res) | |
542 | dlm_lockres_put(res); | |
543 | ||
544 | dlm_put(dlm); | |
545 | ||
546 | return status; | |
547 | } |