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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> | |
6714d8e8 | 31 | #include <linux/highmem.h> |
6714d8e8 KH |
32 | #include <linux/init.h> |
33 | #include <linux/sysctl.h> | |
34 | #include <linux/random.h> | |
35 | #include <linux/blkdev.h> | |
36 | #include <linux/socket.h> | |
37 | #include <linux/inet.h> | |
38 | #include <linux/spinlock.h> | |
39 | ||
40 | ||
41 | #include "cluster/heartbeat.h" | |
42 | #include "cluster/nodemanager.h" | |
43 | #include "cluster/tcp.h" | |
44 | ||
45 | #include "dlmapi.h" | |
46 | #include "dlmcommon.h" | |
47 | ||
48 | #include "dlmconvert.h" | |
49 | ||
50 | #define MLOG_MASK_PREFIX ML_DLM | |
51 | #include "cluster/masklog.h" | |
52 | ||
53 | /* NOTE: __dlmconvert_master is the only function in here that | |
54 | * needs a spinlock held on entry (res->spinlock) and it is the | |
55 | * only one that holds a lock on exit (res->spinlock). | |
56 | * All other functions in here need no locks and drop all of | |
57 | * the locks that they acquire. */ | |
58 | static enum dlm_status __dlmconvert_master(struct dlm_ctxt *dlm, | |
59 | struct dlm_lock_resource *res, | |
60 | struct dlm_lock *lock, int flags, | |
61 | int type, int *call_ast, | |
62 | int *kick_thread); | |
63 | static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm, | |
64 | struct dlm_lock_resource *res, | |
65 | struct dlm_lock *lock, int flags, int type); | |
66 | ||
67 | /* | |
68 | * this is only called directly by dlmlock(), and only when the | |
69 | * local node is the owner of the lockres | |
70 | * locking: | |
71 | * caller needs: none | |
72 | * taken: takes and drops res->spinlock | |
73 | * held on exit: none | |
74 | * returns: see __dlmconvert_master | |
75 | */ | |
76 | enum dlm_status dlmconvert_master(struct dlm_ctxt *dlm, | |
77 | struct dlm_lock_resource *res, | |
78 | struct dlm_lock *lock, int flags, int type) | |
79 | { | |
80 | int call_ast = 0, kick_thread = 0; | |
81 | enum dlm_status status; | |
82 | ||
83 | spin_lock(&res->spinlock); | |
84 | /* we are not in a network handler, this is fine */ | |
85 | __dlm_wait_on_lockres(res); | |
86 | __dlm_lockres_reserve_ast(res); | |
87 | res->state |= DLM_LOCK_RES_IN_PROGRESS; | |
88 | ||
89 | status = __dlmconvert_master(dlm, res, lock, flags, type, | |
90 | &call_ast, &kick_thread); | |
91 | ||
92 | res->state &= ~DLM_LOCK_RES_IN_PROGRESS; | |
93 | spin_unlock(&res->spinlock); | |
94 | wake_up(&res->wq); | |
95 | if (status != DLM_NORMAL && status != DLM_NOTQUEUED) | |
96 | dlm_error(status); | |
97 | ||
98 | /* either queue the ast or release it */ | |
99 | if (call_ast) | |
100 | dlm_queue_ast(dlm, lock); | |
101 | else | |
102 | dlm_lockres_release_ast(dlm, res); | |
103 | ||
104 | if (kick_thread) | |
105 | dlm_kick_thread(dlm, res); | |
106 | ||
107 | return status; | |
108 | } | |
109 | ||
110 | /* performs lock conversion at the lockres master site | |
111 | * locking: | |
112 | * caller needs: res->spinlock | |
113 | * taken: takes and drops lock->spinlock | |
114 | * held on exit: res->spinlock | |
115 | * returns: DLM_NORMAL, DLM_NOTQUEUED, DLM_DENIED | |
116 | * call_ast: whether ast should be called for this lock | |
117 | * kick_thread: whether dlm_kick_thread should be called | |
118 | */ | |
119 | static enum dlm_status __dlmconvert_master(struct dlm_ctxt *dlm, | |
120 | struct dlm_lock_resource *res, | |
121 | struct dlm_lock *lock, int flags, | |
122 | int type, int *call_ast, | |
123 | int *kick_thread) | |
124 | { | |
125 | enum dlm_status status = DLM_NORMAL; | |
126 | struct list_head *iter; | |
127 | struct dlm_lock *tmplock=NULL; | |
128 | ||
129 | assert_spin_locked(&res->spinlock); | |
130 | ||
131 | mlog_entry("type=%d, convert_type=%d, new convert_type=%d\n", | |
132 | lock->ml.type, lock->ml.convert_type, type); | |
133 | ||
134 | spin_lock(&lock->spinlock); | |
135 | ||
136 | /* already converting? */ | |
137 | if (lock->ml.convert_type != LKM_IVMODE) { | |
138 | mlog(ML_ERROR, "attempted to convert a lock with a lock " | |
139 | "conversion pending\n"); | |
140 | status = DLM_DENIED; | |
141 | goto unlock_exit; | |
142 | } | |
143 | ||
144 | /* must be on grant queue to convert */ | |
145 | if (!dlm_lock_on_list(&res->granted, lock)) { | |
146 | mlog(ML_ERROR, "attempted to convert a lock not on grant " | |
147 | "queue\n"); | |
148 | status = DLM_DENIED; | |
149 | goto unlock_exit; | |
150 | } | |
151 | ||
152 | if (flags & LKM_VALBLK) { | |
153 | switch (lock->ml.type) { | |
154 | case LKM_EXMODE: | |
155 | /* EX + LKM_VALBLK + convert == set lvb */ | |
156 | mlog(0, "will set lvb: converting %s->%s\n", | |
157 | dlm_lock_mode_name(lock->ml.type), | |
158 | dlm_lock_mode_name(type)); | |
159 | lock->lksb->flags |= DLM_LKSB_PUT_LVB; | |
160 | break; | |
161 | case LKM_PRMODE: | |
162 | case LKM_NLMODE: | |
163 | /* refetch if new level is not NL */ | |
164 | if (type > LKM_NLMODE) { | |
165 | mlog(0, "will fetch new value into " | |
166 | "lvb: converting %s->%s\n", | |
167 | dlm_lock_mode_name(lock->ml.type), | |
168 | dlm_lock_mode_name(type)); | |
169 | lock->lksb->flags |= DLM_LKSB_GET_LVB; | |
170 | } else { | |
171 | mlog(0, "will NOT fetch new value " | |
172 | "into lvb: converting %s->%s\n", | |
173 | dlm_lock_mode_name(lock->ml.type), | |
174 | dlm_lock_mode_name(type)); | |
175 | flags &= ~(LKM_VALBLK); | |
176 | } | |
177 | break; | |
178 | } | |
179 | } | |
180 | ||
181 | ||
182 | /* in-place downconvert? */ | |
183 | if (type <= lock->ml.type) | |
184 | goto grant; | |
185 | ||
186 | /* upconvert from here on */ | |
187 | status = DLM_NORMAL; | |
188 | list_for_each(iter, &res->granted) { | |
189 | tmplock = list_entry(iter, struct dlm_lock, list); | |
190 | if (tmplock == lock) | |
191 | continue; | |
192 | if (!dlm_lock_compatible(tmplock->ml.type, type)) | |
193 | goto switch_queues; | |
194 | } | |
195 | ||
196 | list_for_each(iter, &res->converting) { | |
197 | tmplock = list_entry(iter, struct dlm_lock, list); | |
198 | if (!dlm_lock_compatible(tmplock->ml.type, type)) | |
199 | goto switch_queues; | |
200 | /* existing conversion requests take precedence */ | |
201 | if (!dlm_lock_compatible(tmplock->ml.convert_type, type)) | |
202 | goto switch_queues; | |
203 | } | |
204 | ||
205 | /* fall thru to grant */ | |
206 | ||
207 | grant: | |
208 | mlog(0, "res %.*s, granting %s lock\n", res->lockname.len, | |
209 | res->lockname.name, dlm_lock_mode_name(type)); | |
210 | /* immediately grant the new lock type */ | |
211 | lock->lksb->status = DLM_NORMAL; | |
212 | if (lock->ml.node == dlm->node_num) | |
213 | mlog(0, "doing in-place convert for nonlocal lock\n"); | |
214 | lock->ml.type = type; | |
c0a8520c MF |
215 | if (lock->lksb->flags & DLM_LKSB_PUT_LVB) |
216 | memcpy(res->lvb, lock->lksb->lvb, DLM_LVB_LEN); | |
217 | ||
6714d8e8 KH |
218 | status = DLM_NORMAL; |
219 | *call_ast = 1; | |
220 | goto unlock_exit; | |
221 | ||
222 | switch_queues: | |
223 | if (flags & LKM_NOQUEUE) { | |
224 | mlog(0, "failed to convert NOQUEUE lock %.*s from " | |
225 | "%d to %d...\n", res->lockname.len, res->lockname.name, | |
226 | lock->ml.type, type); | |
227 | status = DLM_NOTQUEUED; | |
228 | goto unlock_exit; | |
229 | } | |
230 | mlog(0, "res %.*s, queueing...\n", res->lockname.len, | |
231 | res->lockname.name); | |
232 | ||
233 | lock->ml.convert_type = type; | |
234 | /* do not alter lock refcount. switching lists. */ | |
f116629d | 235 | list_move_tail(&lock->list, &res->converting); |
6714d8e8 KH |
236 | |
237 | unlock_exit: | |
238 | spin_unlock(&lock->spinlock); | |
239 | if (status == DLM_DENIED) { | |
240 | __dlm_print_one_lock_resource(res); | |
241 | } | |
242 | if (status == DLM_NORMAL) | |
243 | *kick_thread = 1; | |
244 | return status; | |
245 | } | |
246 | ||
247 | void dlm_revert_pending_convert(struct dlm_lock_resource *res, | |
248 | struct dlm_lock *lock) | |
249 | { | |
250 | /* do not alter lock refcount. switching lists. */ | |
f116629d | 251 | list_move_tail(&lock->list, &res->granted); |
6714d8e8 KH |
252 | lock->ml.convert_type = LKM_IVMODE; |
253 | lock->lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB); | |
254 | } | |
255 | ||
256 | /* messages the master site to do lock conversion | |
257 | * locking: | |
258 | * caller needs: none | |
259 | * taken: takes and drops res->spinlock, uses DLM_LOCK_RES_IN_PROGRESS | |
260 | * held on exit: none | |
261 | * returns: DLM_NORMAL, DLM_RECOVERING, status from remote node | |
262 | */ | |
263 | enum dlm_status dlmconvert_remote(struct dlm_ctxt *dlm, | |
264 | struct dlm_lock_resource *res, | |
265 | struct dlm_lock *lock, int flags, int type) | |
266 | { | |
267 | enum dlm_status status; | |
268 | ||
269 | mlog(0, "type=%d, convert_type=%d, busy=%d\n", lock->ml.type, | |
270 | lock->ml.convert_type, res->state & DLM_LOCK_RES_IN_PROGRESS); | |
271 | ||
272 | spin_lock(&res->spinlock); | |
273 | if (res->state & DLM_LOCK_RES_RECOVERING) { | |
274 | mlog(0, "bailing out early since res is RECOVERING " | |
275 | "on secondary queue\n"); | |
276 | /* __dlm_print_one_lock_resource(res); */ | |
277 | status = DLM_RECOVERING; | |
278 | goto bail; | |
279 | } | |
280 | /* will exit this call with spinlock held */ | |
281 | __dlm_wait_on_lockres(res); | |
282 | ||
283 | if (lock->ml.convert_type != LKM_IVMODE) { | |
284 | __dlm_print_one_lock_resource(res); | |
285 | mlog(ML_ERROR, "converting a remote lock that is already " | |
29004858 | 286 | "converting! (cookie=%u:%llu, conv=%d)\n", |
74aa2585 KH |
287 | dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), |
288 | dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), | |
29004858 | 289 | lock->ml.convert_type); |
6714d8e8 KH |
290 | status = DLM_DENIED; |
291 | goto bail; | |
292 | } | |
293 | res->state |= DLM_LOCK_RES_IN_PROGRESS; | |
294 | /* move lock to local convert queue */ | |
295 | /* do not alter lock refcount. switching lists. */ | |
f116629d | 296 | list_move_tail(&lock->list, &res->converting); |
6714d8e8 KH |
297 | lock->convert_pending = 1; |
298 | lock->ml.convert_type = type; | |
299 | ||
300 | if (flags & LKM_VALBLK) { | |
301 | if (lock->ml.type == LKM_EXMODE) { | |
302 | flags |= LKM_PUT_LVB; | |
303 | lock->lksb->flags |= DLM_LKSB_PUT_LVB; | |
304 | } else { | |
305 | if (lock->ml.convert_type == LKM_NLMODE) | |
306 | flags &= ~LKM_VALBLK; | |
307 | else { | |
308 | flags |= LKM_GET_LVB; | |
309 | lock->lksb->flags |= DLM_LKSB_GET_LVB; | |
310 | } | |
311 | } | |
312 | } | |
313 | spin_unlock(&res->spinlock); | |
314 | ||
315 | /* no locks held here. | |
316 | * need to wait for a reply as to whether it got queued or not. */ | |
317 | status = dlm_send_remote_convert_request(dlm, res, lock, flags, type); | |
318 | ||
319 | spin_lock(&res->spinlock); | |
320 | res->state &= ~DLM_LOCK_RES_IN_PROGRESS; | |
321 | lock->convert_pending = 0; | |
322 | /* if it failed, move it back to granted queue */ | |
323 | if (status != DLM_NORMAL) { | |
324 | if (status != DLM_NOTQUEUED) | |
325 | dlm_error(status); | |
326 | dlm_revert_pending_convert(res, lock); | |
327 | } | |
328 | bail: | |
329 | spin_unlock(&res->spinlock); | |
330 | ||
331 | /* TODO: should this be a wake_one? */ | |
332 | /* wake up any IN_PROGRESS waiters */ | |
333 | wake_up(&res->wq); | |
334 | ||
335 | return status; | |
336 | } | |
337 | ||
338 | /* sends DLM_CONVERT_LOCK_MSG to master site | |
339 | * locking: | |
340 | * caller needs: none | |
341 | * taken: none | |
342 | * held on exit: none | |
343 | * returns: DLM_NOLOCKMGR, status from remote node | |
344 | */ | |
345 | static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm, | |
346 | struct dlm_lock_resource *res, | |
347 | struct dlm_lock *lock, int flags, int type) | |
348 | { | |
349 | struct dlm_convert_lock convert; | |
350 | int tmpret; | |
351 | enum dlm_status ret; | |
352 | int status = 0; | |
353 | struct kvec vec[2]; | |
354 | size_t veclen = 1; | |
355 | ||
356 | mlog_entry("%.*s\n", res->lockname.len, res->lockname.name); | |
357 | ||
358 | memset(&convert, 0, sizeof(struct dlm_convert_lock)); | |
359 | convert.node_idx = dlm->node_num; | |
360 | convert.requested_type = type; | |
361 | convert.cookie = lock->ml.cookie; | |
362 | convert.namelen = res->lockname.len; | |
363 | convert.flags = cpu_to_be32(flags); | |
364 | memcpy(convert.name, res->lockname.name, convert.namelen); | |
365 | ||
366 | vec[0].iov_len = sizeof(struct dlm_convert_lock); | |
367 | vec[0].iov_base = &convert; | |
368 | ||
369 | if (flags & LKM_PUT_LVB) { | |
370 | /* extra data to send if we are updating lvb */ | |
371 | vec[1].iov_len = DLM_LVB_LEN; | |
372 | vec[1].iov_base = lock->lksb->lvb; | |
373 | veclen++; | |
374 | } | |
375 | ||
376 | tmpret = o2net_send_message_vec(DLM_CONVERT_LOCK_MSG, dlm->key, | |
377 | vec, veclen, res->owner, &status); | |
378 | if (tmpret >= 0) { | |
379 | // successfully sent and received | |
380 | ret = status; // this is already a dlm_status | |
381 | if (ret == DLM_RECOVERING) { | |
382 | mlog(0, "node %u returned DLM_RECOVERING from convert " | |
383 | "message!\n", res->owner); | |
384 | } else if (ret == DLM_MIGRATING) { | |
385 | mlog(0, "node %u returned DLM_MIGRATING from convert " | |
386 | "message!\n", res->owner); | |
387 | } else if (ret == DLM_FORWARD) { | |
388 | mlog(0, "node %u returned DLM_FORWARD from convert " | |
389 | "message!\n", res->owner); | |
390 | } else if (ret != DLM_NORMAL && ret != DLM_NOTQUEUED) | |
391 | dlm_error(ret); | |
392 | } else { | |
a5196ec5 WW |
393 | mlog(ML_ERROR, "Error %d when sending message %u (key 0x%x) to " |
394 | "node %u\n", tmpret, DLM_CONVERT_LOCK_MSG, dlm->key, | |
395 | res->owner); | |
6714d8e8 | 396 | if (dlm_is_host_down(tmpret)) { |
44465a7d KH |
397 | /* instead of logging the same network error over |
398 | * and over, sleep here and wait for the heartbeat | |
399 | * to notice the node is dead. times out after 5s. */ | |
2bd63216 | 400 | dlm_wait_for_node_death(dlm, res->owner, |
44465a7d | 401 | DLM_NODE_DEATH_WAIT_MAX); |
6714d8e8 KH |
402 | ret = DLM_RECOVERING; |
403 | mlog(0, "node %u died so returning DLM_RECOVERING " | |
404 | "from convert message!\n", res->owner); | |
405 | } else { | |
406 | ret = dlm_err_to_dlm_status(tmpret); | |
407 | } | |
408 | } | |
409 | ||
410 | return ret; | |
411 | } | |
412 | ||
413 | /* handler for DLM_CONVERT_LOCK_MSG on master site | |
414 | * locking: | |
415 | * caller needs: none | |
416 | * taken: takes and drop res->spinlock | |
417 | * held on exit: none | |
418 | * returns: DLM_NORMAL, DLM_IVLOCKID, DLM_BADARGS, | |
419 | * status from __dlmconvert_master | |
420 | */ | |
d74c9803 KH |
421 | int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data, |
422 | void **ret_data) | |
6714d8e8 KH |
423 | { |
424 | struct dlm_ctxt *dlm = data; | |
425 | struct dlm_convert_lock *cnv = (struct dlm_convert_lock *)msg->buf; | |
426 | struct dlm_lock_resource *res = NULL; | |
427 | struct list_head *iter; | |
428 | struct dlm_lock *lock = NULL; | |
429 | struct dlm_lockstatus *lksb; | |
430 | enum dlm_status status = DLM_NORMAL; | |
431 | u32 flags; | |
a6fa3640 | 432 | int call_ast = 0, kick_thread = 0, ast_reserved = 0, wake = 0; |
6714d8e8 KH |
433 | |
434 | if (!dlm_grab(dlm)) { | |
435 | dlm_error(DLM_REJECTED); | |
436 | return DLM_REJECTED; | |
437 | } | |
438 | ||
439 | mlog_bug_on_msg(!dlm_domain_fully_joined(dlm), | |
440 | "Domain %s not fully joined!\n", dlm->name); | |
441 | ||
442 | if (cnv->namelen > DLM_LOCKID_NAME_MAX) { | |
443 | status = DLM_IVBUFLEN; | |
444 | dlm_error(status); | |
445 | goto leave; | |
446 | } | |
447 | ||
448 | flags = be32_to_cpu(cnv->flags); | |
449 | ||
450 | if ((flags & (LKM_PUT_LVB|LKM_GET_LVB)) == | |
451 | (LKM_PUT_LVB|LKM_GET_LVB)) { | |
452 | mlog(ML_ERROR, "both PUT and GET lvb specified\n"); | |
453 | status = DLM_BADARGS; | |
454 | goto leave; | |
455 | } | |
456 | ||
457 | mlog(0, "lvb: %s\n", flags & LKM_PUT_LVB ? "put lvb" : | |
458 | (flags & LKM_GET_LVB ? "get lvb" : "none")); | |
459 | ||
460 | status = DLM_IVLOCKID; | |
461 | res = dlm_lookup_lockres(dlm, cnv->name, cnv->namelen); | |
462 | if (!res) { | |
463 | dlm_error(status); | |
464 | goto leave; | |
465 | } | |
466 | ||
467 | spin_lock(&res->spinlock); | |
b220532a KH |
468 | status = __dlm_lockres_state_to_status(res); |
469 | if (status != DLM_NORMAL) { | |
470 | spin_unlock(&res->spinlock); | |
471 | dlm_error(status); | |
472 | goto leave; | |
473 | } | |
6714d8e8 KH |
474 | list_for_each(iter, &res->granted) { |
475 | lock = list_entry(iter, struct dlm_lock, list); | |
476 | if (lock->ml.cookie == cnv->cookie && | |
477 | lock->ml.node == cnv->node_idx) { | |
478 | dlm_lock_get(lock); | |
479 | break; | |
480 | } | |
481 | lock = NULL; | |
482 | } | |
483 | spin_unlock(&res->spinlock); | |
484 | if (!lock) { | |
485 | status = DLM_IVLOCKID; | |
90aaaf1c KH |
486 | mlog(ML_ERROR, "did not find lock to convert on grant queue! " |
487 | "cookie=%u:%llu\n", | |
74aa2585 KH |
488 | dlm_get_lock_cookie_node(be64_to_cpu(cnv->cookie)), |
489 | dlm_get_lock_cookie_seq(be64_to_cpu(cnv->cookie))); | |
2af37ce8 | 490 | dlm_print_one_lock_resource(res); |
6714d8e8 KH |
491 | goto leave; |
492 | } | |
493 | ||
494 | /* found the lock */ | |
495 | lksb = lock->lksb; | |
496 | ||
497 | /* see if caller needed to get/put lvb */ | |
498 | if (flags & LKM_PUT_LVB) { | |
499 | BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB)); | |
500 | lksb->flags |= DLM_LKSB_PUT_LVB; | |
501 | memcpy(&lksb->lvb[0], &cnv->lvb[0], DLM_LVB_LEN); | |
502 | } else if (flags & LKM_GET_LVB) { | |
503 | BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB)); | |
504 | lksb->flags |= DLM_LKSB_GET_LVB; | |
505 | } | |
506 | ||
507 | spin_lock(&res->spinlock); | |
508 | status = __dlm_lockres_state_to_status(res); | |
509 | if (status == DLM_NORMAL) { | |
510 | __dlm_lockres_reserve_ast(res); | |
e2b5e450 | 511 | ast_reserved = 1; |
6714d8e8 KH |
512 | res->state |= DLM_LOCK_RES_IN_PROGRESS; |
513 | status = __dlmconvert_master(dlm, res, lock, flags, | |
514 | cnv->requested_type, | |
515 | &call_ast, &kick_thread); | |
516 | res->state &= ~DLM_LOCK_RES_IN_PROGRESS; | |
a6fa3640 | 517 | wake = 1; |
6714d8e8 KH |
518 | } |
519 | spin_unlock(&res->spinlock); | |
a6fa3640 KH |
520 | if (wake) |
521 | wake_up(&res->wq); | |
6714d8e8 KH |
522 | |
523 | if (status != DLM_NORMAL) { | |
524 | if (status != DLM_NOTQUEUED) | |
525 | dlm_error(status); | |
526 | lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB); | |
527 | } | |
528 | ||
529 | leave: | |
90aaaf1c | 530 | if (lock) |
6714d8e8 KH |
531 | dlm_lock_put(lock); |
532 | ||
e2b5e450 | 533 | /* either queue the ast or release it, if reserved */ |
6714d8e8 KH |
534 | if (call_ast) |
535 | dlm_queue_ast(dlm, lock); | |
e2b5e450 | 536 | else if (ast_reserved) |
6714d8e8 KH |
537 | dlm_lockres_release_ast(dlm, res); |
538 | ||
539 | if (kick_thread) | |
540 | dlm_kick_thread(dlm, res); | |
541 | ||
542 | if (res) | |
543 | dlm_lockres_put(res); | |
544 | ||
545 | dlm_put(dlm); | |
546 | ||
547 | return status; | |
548 | } |