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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; | |
6714d8e8 KH |
126 | struct dlm_lock *tmplock=NULL; |
127 | ||
128 | assert_spin_locked(&res->spinlock); | |
129 | ||
ef6b689b TM |
130 | mlog(0, "type=%d, convert_type=%d, new convert_type=%d\n", |
131 | lock->ml.type, lock->ml.convert_type, type); | |
6714d8e8 KH |
132 | |
133 | spin_lock(&lock->spinlock); | |
134 | ||
135 | /* already converting? */ | |
136 | if (lock->ml.convert_type != LKM_IVMODE) { | |
137 | mlog(ML_ERROR, "attempted to convert a lock with a lock " | |
138 | "conversion pending\n"); | |
139 | status = DLM_DENIED; | |
140 | goto unlock_exit; | |
141 | } | |
142 | ||
143 | /* must be on grant queue to convert */ | |
144 | if (!dlm_lock_on_list(&res->granted, lock)) { | |
145 | mlog(ML_ERROR, "attempted to convert a lock not on grant " | |
146 | "queue\n"); | |
147 | status = DLM_DENIED; | |
148 | goto unlock_exit; | |
149 | } | |
150 | ||
151 | if (flags & LKM_VALBLK) { | |
152 | switch (lock->ml.type) { | |
153 | case LKM_EXMODE: | |
154 | /* EX + LKM_VALBLK + convert == set lvb */ | |
155 | mlog(0, "will set lvb: converting %s->%s\n", | |
156 | dlm_lock_mode_name(lock->ml.type), | |
157 | dlm_lock_mode_name(type)); | |
158 | lock->lksb->flags |= DLM_LKSB_PUT_LVB; | |
159 | break; | |
160 | case LKM_PRMODE: | |
161 | case LKM_NLMODE: | |
162 | /* refetch if new level is not NL */ | |
163 | if (type > LKM_NLMODE) { | |
164 | mlog(0, "will fetch new value into " | |
165 | "lvb: converting %s->%s\n", | |
166 | dlm_lock_mode_name(lock->ml.type), | |
167 | dlm_lock_mode_name(type)); | |
168 | lock->lksb->flags |= DLM_LKSB_GET_LVB; | |
169 | } else { | |
170 | mlog(0, "will NOT fetch new value " | |
171 | "into lvb: converting %s->%s\n", | |
172 | dlm_lock_mode_name(lock->ml.type), | |
173 | dlm_lock_mode_name(type)); | |
174 | flags &= ~(LKM_VALBLK); | |
175 | } | |
176 | break; | |
177 | } | |
178 | } | |
179 | ||
180 | ||
181 | /* in-place downconvert? */ | |
182 | if (type <= lock->ml.type) | |
183 | goto grant; | |
184 | ||
185 | /* upconvert from here on */ | |
186 | status = DLM_NORMAL; | |
df53cd3b | 187 | list_for_each_entry(tmplock, &res->granted, list) { |
6714d8e8 KH |
188 | if (tmplock == lock) |
189 | continue; | |
190 | if (!dlm_lock_compatible(tmplock->ml.type, type)) | |
191 | goto switch_queues; | |
192 | } | |
193 | ||
df53cd3b | 194 | list_for_each_entry(tmplock, &res->converting, list) { |
6714d8e8 KH |
195 | if (!dlm_lock_compatible(tmplock->ml.type, type)) |
196 | goto switch_queues; | |
197 | /* existing conversion requests take precedence */ | |
198 | if (!dlm_lock_compatible(tmplock->ml.convert_type, type)) | |
199 | goto switch_queues; | |
200 | } | |
201 | ||
202 | /* fall thru to grant */ | |
203 | ||
204 | grant: | |
205 | mlog(0, "res %.*s, granting %s lock\n", res->lockname.len, | |
206 | res->lockname.name, dlm_lock_mode_name(type)); | |
207 | /* immediately grant the new lock type */ | |
208 | lock->lksb->status = DLM_NORMAL; | |
209 | if (lock->ml.node == dlm->node_num) | |
210 | mlog(0, "doing in-place convert for nonlocal lock\n"); | |
211 | lock->ml.type = type; | |
c0a8520c MF |
212 | if (lock->lksb->flags & DLM_LKSB_PUT_LVB) |
213 | memcpy(res->lvb, lock->lksb->lvb, DLM_LVB_LEN); | |
214 | ||
e5054c9a | 215 | /* |
216 | * Move the lock to the tail because it may be the only lock which has | |
217 | * an invalid lvb. | |
218 | */ | |
219 | list_move_tail(&lock->list, &res->granted); | |
220 | ||
6714d8e8 KH |
221 | status = DLM_NORMAL; |
222 | *call_ast = 1; | |
223 | goto unlock_exit; | |
224 | ||
225 | switch_queues: | |
226 | if (flags & LKM_NOQUEUE) { | |
227 | mlog(0, "failed to convert NOQUEUE lock %.*s from " | |
228 | "%d to %d...\n", res->lockname.len, res->lockname.name, | |
229 | lock->ml.type, type); | |
230 | status = DLM_NOTQUEUED; | |
231 | goto unlock_exit; | |
232 | } | |
233 | mlog(0, "res %.*s, queueing...\n", res->lockname.len, | |
234 | res->lockname.name); | |
235 | ||
236 | lock->ml.convert_type = type; | |
237 | /* do not alter lock refcount. switching lists. */ | |
f116629d | 238 | list_move_tail(&lock->list, &res->converting); |
6714d8e8 KH |
239 | |
240 | unlock_exit: | |
241 | spin_unlock(&lock->spinlock); | |
242 | if (status == DLM_DENIED) { | |
243 | __dlm_print_one_lock_resource(res); | |
244 | } | |
245 | if (status == DLM_NORMAL) | |
246 | *kick_thread = 1; | |
247 | return status; | |
248 | } | |
249 | ||
250 | void dlm_revert_pending_convert(struct dlm_lock_resource *res, | |
251 | struct dlm_lock *lock) | |
252 | { | |
253 | /* do not alter lock refcount. switching lists. */ | |
f116629d | 254 | list_move_tail(&lock->list, &res->granted); |
6714d8e8 KH |
255 | lock->ml.convert_type = LKM_IVMODE; |
256 | lock->lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB); | |
257 | } | |
258 | ||
259 | /* messages the master site to do lock conversion | |
260 | * locking: | |
261 | * caller needs: none | |
262 | * taken: takes and drops res->spinlock, uses DLM_LOCK_RES_IN_PROGRESS | |
263 | * held on exit: none | |
264 | * returns: DLM_NORMAL, DLM_RECOVERING, status from remote node | |
265 | */ | |
266 | enum dlm_status dlmconvert_remote(struct dlm_ctxt *dlm, | |
267 | struct dlm_lock_resource *res, | |
268 | struct dlm_lock *lock, int flags, int type) | |
269 | { | |
270 | enum dlm_status status; | |
271 | ||
272 | mlog(0, "type=%d, convert_type=%d, busy=%d\n", lock->ml.type, | |
273 | lock->ml.convert_type, res->state & DLM_LOCK_RES_IN_PROGRESS); | |
274 | ||
275 | spin_lock(&res->spinlock); | |
276 | if (res->state & DLM_LOCK_RES_RECOVERING) { | |
277 | mlog(0, "bailing out early since res is RECOVERING " | |
278 | "on secondary queue\n"); | |
279 | /* __dlm_print_one_lock_resource(res); */ | |
280 | status = DLM_RECOVERING; | |
281 | goto bail; | |
282 | } | |
283 | /* will exit this call with spinlock held */ | |
284 | __dlm_wait_on_lockres(res); | |
285 | ||
286 | if (lock->ml.convert_type != LKM_IVMODE) { | |
287 | __dlm_print_one_lock_resource(res); | |
288 | mlog(ML_ERROR, "converting a remote lock that is already " | |
29004858 | 289 | "converting! (cookie=%u:%llu, conv=%d)\n", |
74aa2585 KH |
290 | dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), |
291 | dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), | |
29004858 | 292 | lock->ml.convert_type); |
6714d8e8 KH |
293 | status = DLM_DENIED; |
294 | goto bail; | |
295 | } | |
be12b299 JQ |
296 | |
297 | if (lock->ml.type == type && lock->ml.convert_type == LKM_IVMODE) { | |
298 | mlog(0, "last convert request returned DLM_RECOVERING, but " | |
299 | "owner has already queued and sent ast to me. res %.*s, " | |
300 | "(cookie=%u:%llu, type=%d, conv=%d)\n", | |
301 | res->lockname.len, res->lockname.name, | |
302 | dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), | |
303 | dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), | |
304 | lock->ml.type, lock->ml.convert_type); | |
305 | status = DLM_NORMAL; | |
306 | goto bail; | |
307 | } | |
308 | ||
6714d8e8 KH |
309 | res->state |= DLM_LOCK_RES_IN_PROGRESS; |
310 | /* move lock to local convert queue */ | |
311 | /* do not alter lock refcount. switching lists. */ | |
f116629d | 312 | list_move_tail(&lock->list, &res->converting); |
6714d8e8 KH |
313 | lock->convert_pending = 1; |
314 | lock->ml.convert_type = type; | |
315 | ||
316 | if (flags & LKM_VALBLK) { | |
317 | if (lock->ml.type == LKM_EXMODE) { | |
318 | flags |= LKM_PUT_LVB; | |
319 | lock->lksb->flags |= DLM_LKSB_PUT_LVB; | |
320 | } else { | |
321 | if (lock->ml.convert_type == LKM_NLMODE) | |
322 | flags &= ~LKM_VALBLK; | |
323 | else { | |
324 | flags |= LKM_GET_LVB; | |
325 | lock->lksb->flags |= DLM_LKSB_GET_LVB; | |
326 | } | |
327 | } | |
328 | } | |
329 | spin_unlock(&res->spinlock); | |
330 | ||
331 | /* no locks held here. | |
332 | * need to wait for a reply as to whether it got queued or not. */ | |
333 | status = dlm_send_remote_convert_request(dlm, res, lock, flags, type); | |
334 | ||
335 | spin_lock(&res->spinlock); | |
336 | res->state &= ~DLM_LOCK_RES_IN_PROGRESS; | |
ac7cf246 JQ |
337 | /* if it failed, move it back to granted queue. |
338 | * if master returns DLM_NORMAL and then down before sending ast, | |
339 | * it may have already been moved to granted queue, reset to | |
340 | * DLM_RECOVERING and retry convert */ | |
6714d8e8 KH |
341 | if (status != DLM_NORMAL) { |
342 | if (status != DLM_NOTQUEUED) | |
343 | dlm_error(status); | |
344 | dlm_revert_pending_convert(res, lock); | |
e6f0c6e6 JQ |
345 | } else if (!lock->convert_pending) { |
346 | mlog(0, "%s: res %.*s, owner died and lock has been moved back " | |
347 | "to granted list, retry convert.\n", | |
348 | dlm->name, res->lockname.len, res->lockname.name); | |
ac7cf246 | 349 | status = DLM_RECOVERING; |
6714d8e8 | 350 | } |
e6f0c6e6 JQ |
351 | |
352 | lock->convert_pending = 0; | |
6714d8e8 KH |
353 | bail: |
354 | spin_unlock(&res->spinlock); | |
355 | ||
356 | /* TODO: should this be a wake_one? */ | |
357 | /* wake up any IN_PROGRESS waiters */ | |
358 | wake_up(&res->wq); | |
359 | ||
360 | return status; | |
361 | } | |
362 | ||
363 | /* sends DLM_CONVERT_LOCK_MSG to master site | |
364 | * locking: | |
365 | * caller needs: none | |
366 | * taken: none | |
367 | * held on exit: none | |
368 | * returns: DLM_NOLOCKMGR, status from remote node | |
369 | */ | |
370 | static enum dlm_status dlm_send_remote_convert_request(struct dlm_ctxt *dlm, | |
371 | struct dlm_lock_resource *res, | |
372 | struct dlm_lock *lock, int flags, int type) | |
373 | { | |
374 | struct dlm_convert_lock convert; | |
375 | int tmpret; | |
376 | enum dlm_status ret; | |
377 | int status = 0; | |
378 | struct kvec vec[2]; | |
379 | size_t veclen = 1; | |
380 | ||
ef6b689b | 381 | mlog(0, "%.*s\n", res->lockname.len, res->lockname.name); |
6714d8e8 KH |
382 | |
383 | memset(&convert, 0, sizeof(struct dlm_convert_lock)); | |
384 | convert.node_idx = dlm->node_num; | |
385 | convert.requested_type = type; | |
386 | convert.cookie = lock->ml.cookie; | |
387 | convert.namelen = res->lockname.len; | |
388 | convert.flags = cpu_to_be32(flags); | |
389 | memcpy(convert.name, res->lockname.name, convert.namelen); | |
390 | ||
391 | vec[0].iov_len = sizeof(struct dlm_convert_lock); | |
392 | vec[0].iov_base = &convert; | |
393 | ||
394 | if (flags & LKM_PUT_LVB) { | |
395 | /* extra data to send if we are updating lvb */ | |
396 | vec[1].iov_len = DLM_LVB_LEN; | |
397 | vec[1].iov_base = lock->lksb->lvb; | |
398 | veclen++; | |
399 | } | |
400 | ||
401 | tmpret = o2net_send_message_vec(DLM_CONVERT_LOCK_MSG, dlm->key, | |
402 | vec, veclen, res->owner, &status); | |
403 | if (tmpret >= 0) { | |
404 | // successfully sent and received | |
405 | ret = status; // this is already a dlm_status | |
406 | if (ret == DLM_RECOVERING) { | |
407 | mlog(0, "node %u returned DLM_RECOVERING from convert " | |
408 | "message!\n", res->owner); | |
409 | } else if (ret == DLM_MIGRATING) { | |
410 | mlog(0, "node %u returned DLM_MIGRATING from convert " | |
411 | "message!\n", res->owner); | |
412 | } else if (ret == DLM_FORWARD) { | |
413 | mlog(0, "node %u returned DLM_FORWARD from convert " | |
414 | "message!\n", res->owner); | |
415 | } else if (ret != DLM_NORMAL && ret != DLM_NOTQUEUED) | |
416 | dlm_error(ret); | |
417 | } else { | |
a5196ec5 WW |
418 | mlog(ML_ERROR, "Error %d when sending message %u (key 0x%x) to " |
419 | "node %u\n", tmpret, DLM_CONVERT_LOCK_MSG, dlm->key, | |
420 | res->owner); | |
6714d8e8 | 421 | if (dlm_is_host_down(tmpret)) { |
44465a7d KH |
422 | /* instead of logging the same network error over |
423 | * and over, sleep here and wait for the heartbeat | |
424 | * to notice the node is dead. times out after 5s. */ | |
2bd63216 | 425 | dlm_wait_for_node_death(dlm, res->owner, |
44465a7d | 426 | DLM_NODE_DEATH_WAIT_MAX); |
6714d8e8 KH |
427 | ret = DLM_RECOVERING; |
428 | mlog(0, "node %u died so returning DLM_RECOVERING " | |
429 | "from convert message!\n", res->owner); | |
430 | } else { | |
431 | ret = dlm_err_to_dlm_status(tmpret); | |
432 | } | |
433 | } | |
434 | ||
435 | return ret; | |
436 | } | |
437 | ||
438 | /* handler for DLM_CONVERT_LOCK_MSG on master site | |
439 | * locking: | |
440 | * caller needs: none | |
441 | * taken: takes and drop res->spinlock | |
442 | * held on exit: none | |
443 | * returns: DLM_NORMAL, DLM_IVLOCKID, DLM_BADARGS, | |
444 | * status from __dlmconvert_master | |
445 | */ | |
d74c9803 KH |
446 | int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data, |
447 | void **ret_data) | |
6714d8e8 KH |
448 | { |
449 | struct dlm_ctxt *dlm = data; | |
450 | struct dlm_convert_lock *cnv = (struct dlm_convert_lock *)msg->buf; | |
451 | struct dlm_lock_resource *res = NULL; | |
6714d8e8 | 452 | struct dlm_lock *lock = NULL; |
df53cd3b | 453 | struct dlm_lock *tmp_lock; |
6714d8e8 KH |
454 | struct dlm_lockstatus *lksb; |
455 | enum dlm_status status = DLM_NORMAL; | |
456 | u32 flags; | |
a6fa3640 | 457 | int call_ast = 0, kick_thread = 0, ast_reserved = 0, wake = 0; |
6714d8e8 KH |
458 | |
459 | if (!dlm_grab(dlm)) { | |
460 | dlm_error(DLM_REJECTED); | |
461 | return DLM_REJECTED; | |
462 | } | |
463 | ||
464 | mlog_bug_on_msg(!dlm_domain_fully_joined(dlm), | |
465 | "Domain %s not fully joined!\n", dlm->name); | |
466 | ||
467 | if (cnv->namelen > DLM_LOCKID_NAME_MAX) { | |
468 | status = DLM_IVBUFLEN; | |
469 | dlm_error(status); | |
470 | goto leave; | |
471 | } | |
472 | ||
473 | flags = be32_to_cpu(cnv->flags); | |
474 | ||
475 | if ((flags & (LKM_PUT_LVB|LKM_GET_LVB)) == | |
476 | (LKM_PUT_LVB|LKM_GET_LVB)) { | |
477 | mlog(ML_ERROR, "both PUT and GET lvb specified\n"); | |
478 | status = DLM_BADARGS; | |
479 | goto leave; | |
480 | } | |
481 | ||
482 | mlog(0, "lvb: %s\n", flags & LKM_PUT_LVB ? "put lvb" : | |
483 | (flags & LKM_GET_LVB ? "get lvb" : "none")); | |
484 | ||
485 | status = DLM_IVLOCKID; | |
486 | res = dlm_lookup_lockres(dlm, cnv->name, cnv->namelen); | |
487 | if (!res) { | |
488 | dlm_error(status); | |
489 | goto leave; | |
490 | } | |
491 | ||
492 | spin_lock(&res->spinlock); | |
b220532a KH |
493 | status = __dlm_lockres_state_to_status(res); |
494 | if (status != DLM_NORMAL) { | |
495 | spin_unlock(&res->spinlock); | |
496 | dlm_error(status); | |
497 | goto leave; | |
498 | } | |
df53cd3b DF |
499 | list_for_each_entry(tmp_lock, &res->granted, list) { |
500 | if (tmp_lock->ml.cookie == cnv->cookie && | |
501 | tmp_lock->ml.node == cnv->node_idx) { | |
502 | lock = tmp_lock; | |
6714d8e8 KH |
503 | dlm_lock_get(lock); |
504 | break; | |
505 | } | |
6714d8e8 KH |
506 | } |
507 | spin_unlock(&res->spinlock); | |
508 | if (!lock) { | |
509 | status = DLM_IVLOCKID; | |
90aaaf1c KH |
510 | mlog(ML_ERROR, "did not find lock to convert on grant queue! " |
511 | "cookie=%u:%llu\n", | |
74aa2585 KH |
512 | dlm_get_lock_cookie_node(be64_to_cpu(cnv->cookie)), |
513 | dlm_get_lock_cookie_seq(be64_to_cpu(cnv->cookie))); | |
2af37ce8 | 514 | dlm_print_one_lock_resource(res); |
6714d8e8 KH |
515 | goto leave; |
516 | } | |
517 | ||
518 | /* found the lock */ | |
519 | lksb = lock->lksb; | |
520 | ||
521 | /* see if caller needed to get/put lvb */ | |
522 | if (flags & LKM_PUT_LVB) { | |
523 | BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB)); | |
524 | lksb->flags |= DLM_LKSB_PUT_LVB; | |
525 | memcpy(&lksb->lvb[0], &cnv->lvb[0], DLM_LVB_LEN); | |
526 | } else if (flags & LKM_GET_LVB) { | |
527 | BUG_ON(lksb->flags & (DLM_LKSB_PUT_LVB|DLM_LKSB_GET_LVB)); | |
528 | lksb->flags |= DLM_LKSB_GET_LVB; | |
529 | } | |
530 | ||
531 | spin_lock(&res->spinlock); | |
532 | status = __dlm_lockres_state_to_status(res); | |
533 | if (status == DLM_NORMAL) { | |
534 | __dlm_lockres_reserve_ast(res); | |
e2b5e450 | 535 | ast_reserved = 1; |
6714d8e8 KH |
536 | res->state |= DLM_LOCK_RES_IN_PROGRESS; |
537 | status = __dlmconvert_master(dlm, res, lock, flags, | |
538 | cnv->requested_type, | |
539 | &call_ast, &kick_thread); | |
540 | res->state &= ~DLM_LOCK_RES_IN_PROGRESS; | |
a6fa3640 | 541 | wake = 1; |
6714d8e8 KH |
542 | } |
543 | spin_unlock(&res->spinlock); | |
a6fa3640 KH |
544 | if (wake) |
545 | wake_up(&res->wq); | |
6714d8e8 KH |
546 | |
547 | if (status != DLM_NORMAL) { | |
548 | if (status != DLM_NOTQUEUED) | |
549 | dlm_error(status); | |
550 | lksb->flags &= ~(DLM_LKSB_GET_LVB|DLM_LKSB_PUT_LVB); | |
551 | } | |
552 | ||
553 | leave: | |
90aaaf1c | 554 | if (lock) |
6714d8e8 KH |
555 | dlm_lock_put(lock); |
556 | ||
e2b5e450 | 557 | /* either queue the ast or release it, if reserved */ |
6714d8e8 KH |
558 | if (call_ast) |
559 | dlm_queue_ast(dlm, lock); | |
e2b5e450 | 560 | else if (ast_reserved) |
6714d8e8 KH |
561 | dlm_lockres_release_ast(dlm, res); |
562 | ||
563 | if (kick_thread) | |
564 | dlm_kick_thread(dlm, res); | |
565 | ||
566 | if (res) | |
567 | dlm_lockres_put(res); | |
568 | ||
569 | dlm_put(dlm); | |
570 | ||
571 | return status; | |
572 | } |