Commit | Line | Data |
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e7fd4179 DT |
1 | /****************************************************************************** |
2 | ******************************************************************************* | |
3 | ** | |
4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
60f98d18 | 5 | ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. |
e7fd4179 DT |
6 | ** |
7 | ** This copyrighted material is made available to anyone wishing to use, | |
8 | ** modify, copy, or redistribute it subject to the terms and conditions | |
9 | ** of the GNU General Public License v.2. | |
10 | ** | |
11 | ******************************************************************************* | |
12 | ******************************************************************************/ | |
13 | ||
14 | #include "dlm_internal.h" | |
15 | #include "lockspace.h" | |
16 | #include "member.h" | |
17 | #include "recoverd.h" | |
e7fd4179 DT |
18 | #include "dir.h" |
19 | #include "lowcomms.h" | |
20 | #include "config.h" | |
21 | #include "memory.h" | |
22 | #include "lock.h" | |
c56b39cd | 23 | #include "recover.h" |
2896ee37 | 24 | #include "requestqueue.h" |
0f8e0d9a | 25 | #include "user.h" |
23e8e1aa | 26 | #include "ast.h" |
e7fd4179 | 27 | |
e7fd4179 | 28 | static int ls_count; |
90135925 | 29 | static struct mutex ls_lock; |
e7fd4179 DT |
30 | static struct list_head lslist; |
31 | static spinlock_t lslist_lock; | |
32 | static struct task_struct * scand_task; | |
33 | ||
34 | ||
35 | static ssize_t dlm_control_store(struct dlm_ls *ls, const char *buf, size_t len) | |
36 | { | |
37 | ssize_t ret = len; | |
38 | int n = simple_strtol(buf, NULL, 0); | |
39 | ||
e2de7f56 PC |
40 | ls = dlm_find_lockspace_local(ls->ls_local_handle); |
41 | if (!ls) | |
42 | return -EINVAL; | |
43 | ||
e7fd4179 DT |
44 | switch (n) { |
45 | case 0: | |
46 | dlm_ls_stop(ls); | |
47 | break; | |
48 | case 1: | |
49 | dlm_ls_start(ls); | |
50 | break; | |
51 | default: | |
52 | ret = -EINVAL; | |
53 | } | |
e2de7f56 | 54 | dlm_put_lockspace(ls); |
e7fd4179 DT |
55 | return ret; |
56 | } | |
57 | ||
58 | static ssize_t dlm_event_store(struct dlm_ls *ls, const char *buf, size_t len) | |
59 | { | |
60 | ls->ls_uevent_result = simple_strtol(buf, NULL, 0); | |
61 | set_bit(LSFL_UEVENT_WAIT, &ls->ls_flags); | |
62 | wake_up(&ls->ls_uevent_wait); | |
63 | return len; | |
64 | } | |
65 | ||
66 | static ssize_t dlm_id_show(struct dlm_ls *ls, char *buf) | |
67 | { | |
a1d144c7 | 68 | return snprintf(buf, PAGE_SIZE, "%u\n", ls->ls_global_id); |
e7fd4179 DT |
69 | } |
70 | ||
71 | static ssize_t dlm_id_store(struct dlm_ls *ls, const char *buf, size_t len) | |
72 | { | |
73 | ls->ls_global_id = simple_strtoul(buf, NULL, 0); | |
74 | return len; | |
75 | } | |
76 | ||
4875647a DT |
77 | static ssize_t dlm_nodir_show(struct dlm_ls *ls, char *buf) |
78 | { | |
79 | return snprintf(buf, PAGE_SIZE, "%u\n", dlm_no_directory(ls)); | |
80 | } | |
81 | ||
82 | static ssize_t dlm_nodir_store(struct dlm_ls *ls, const char *buf, size_t len) | |
83 | { | |
84 | int val = simple_strtoul(buf, NULL, 0); | |
85 | if (val == 1) | |
86 | set_bit(LSFL_NODIR, &ls->ls_flags); | |
87 | return len; | |
88 | } | |
89 | ||
c56b39cd DT |
90 | static ssize_t dlm_recover_status_show(struct dlm_ls *ls, char *buf) |
91 | { | |
92 | uint32_t status = dlm_recover_status(ls); | |
a1d144c7 | 93 | return snprintf(buf, PAGE_SIZE, "%x\n", status); |
c56b39cd DT |
94 | } |
95 | ||
faa0f267 DT |
96 | static ssize_t dlm_recover_nodeid_show(struct dlm_ls *ls, char *buf) |
97 | { | |
a1d144c7 | 98 | return snprintf(buf, PAGE_SIZE, "%d\n", ls->ls_recover_nodeid); |
faa0f267 DT |
99 | } |
100 | ||
e7fd4179 DT |
101 | struct dlm_attr { |
102 | struct attribute attr; | |
103 | ssize_t (*show)(struct dlm_ls *, char *); | |
104 | ssize_t (*store)(struct dlm_ls *, const char *, size_t); | |
105 | }; | |
106 | ||
107 | static struct dlm_attr dlm_attr_control = { | |
108 | .attr = {.name = "control", .mode = S_IWUSR}, | |
109 | .store = dlm_control_store | |
110 | }; | |
111 | ||
112 | static struct dlm_attr dlm_attr_event = { | |
113 | .attr = {.name = "event_done", .mode = S_IWUSR}, | |
114 | .store = dlm_event_store | |
115 | }; | |
116 | ||
117 | static struct dlm_attr dlm_attr_id = { | |
118 | .attr = {.name = "id", .mode = S_IRUGO | S_IWUSR}, | |
119 | .show = dlm_id_show, | |
120 | .store = dlm_id_store | |
121 | }; | |
122 | ||
4875647a DT |
123 | static struct dlm_attr dlm_attr_nodir = { |
124 | .attr = {.name = "nodir", .mode = S_IRUGO | S_IWUSR}, | |
125 | .show = dlm_nodir_show, | |
126 | .store = dlm_nodir_store | |
127 | }; | |
128 | ||
c56b39cd DT |
129 | static struct dlm_attr dlm_attr_recover_status = { |
130 | .attr = {.name = "recover_status", .mode = S_IRUGO}, | |
131 | .show = dlm_recover_status_show | |
132 | }; | |
133 | ||
faa0f267 DT |
134 | static struct dlm_attr dlm_attr_recover_nodeid = { |
135 | .attr = {.name = "recover_nodeid", .mode = S_IRUGO}, | |
136 | .show = dlm_recover_nodeid_show | |
137 | }; | |
138 | ||
e7fd4179 DT |
139 | static struct attribute *dlm_attrs[] = { |
140 | &dlm_attr_control.attr, | |
141 | &dlm_attr_event.attr, | |
142 | &dlm_attr_id.attr, | |
4875647a | 143 | &dlm_attr_nodir.attr, |
c56b39cd | 144 | &dlm_attr_recover_status.attr, |
faa0f267 | 145 | &dlm_attr_recover_nodeid.attr, |
e7fd4179 DT |
146 | NULL, |
147 | }; | |
148 | ||
149 | static ssize_t dlm_attr_show(struct kobject *kobj, struct attribute *attr, | |
150 | char *buf) | |
151 | { | |
152 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
153 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
154 | return a->show ? a->show(ls, buf) : 0; | |
155 | } | |
156 | ||
157 | static ssize_t dlm_attr_store(struct kobject *kobj, struct attribute *attr, | |
158 | const char *buf, size_t len) | |
159 | { | |
160 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
161 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
162 | return a->store ? a->store(ls, buf, len) : len; | |
163 | } | |
164 | ||
ba542e3b PC |
165 | static void lockspace_kobj_release(struct kobject *k) |
166 | { | |
167 | struct dlm_ls *ls = container_of(k, struct dlm_ls, ls_kobj); | |
168 | kfree(ls); | |
169 | } | |
170 | ||
52cf25d0 | 171 | static const struct sysfs_ops dlm_attr_ops = { |
e7fd4179 DT |
172 | .show = dlm_attr_show, |
173 | .store = dlm_attr_store, | |
174 | }; | |
175 | ||
176 | static struct kobj_type dlm_ktype = { | |
177 | .default_attrs = dlm_attrs, | |
178 | .sysfs_ops = &dlm_attr_ops, | |
ba542e3b | 179 | .release = lockspace_kobj_release, |
e7fd4179 DT |
180 | }; |
181 | ||
d405936b | 182 | static struct kset *dlm_kset; |
e7fd4179 | 183 | |
e7fd4179 DT |
184 | static int do_uevent(struct dlm_ls *ls, int in) |
185 | { | |
186 | int error; | |
187 | ||
188 | if (in) | |
189 | kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE); | |
190 | else | |
191 | kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE); | |
192 | ||
8b0e7b2c DT |
193 | log_debug(ls, "%s the lockspace group...", in ? "joining" : "leaving"); |
194 | ||
195 | /* dlm_controld will see the uevent, do the necessary group management | |
196 | and then write to sysfs to wake us */ | |
197 | ||
e7fd4179 DT |
198 | error = wait_event_interruptible(ls->ls_uevent_wait, |
199 | test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags)); | |
8b0e7b2c DT |
200 | |
201 | log_debug(ls, "group event done %d %d", error, ls->ls_uevent_result); | |
202 | ||
e7fd4179 DT |
203 | if (error) |
204 | goto out; | |
205 | ||
206 | error = ls->ls_uevent_result; | |
207 | out: | |
8b0e7b2c DT |
208 | if (error) |
209 | log_error(ls, "group %s failed %d %d", in ? "join" : "leave", | |
210 | error, ls->ls_uevent_result); | |
e7fd4179 DT |
211 | return error; |
212 | } | |
213 | ||
b4a5d4bc SW |
214 | static int dlm_uevent(struct kset *kset, struct kobject *kobj, |
215 | struct kobj_uevent_env *env) | |
216 | { | |
217 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
218 | ||
219 | add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name); | |
220 | return 0; | |
221 | } | |
222 | ||
223 | static struct kset_uevent_ops dlm_uevent_ops = { | |
224 | .uevent = dlm_uevent, | |
225 | }; | |
e7fd4179 | 226 | |
30727174 | 227 | int __init dlm_lockspace_init(void) |
e7fd4179 | 228 | { |
e7fd4179 | 229 | ls_count = 0; |
90135925 | 230 | mutex_init(&ls_lock); |
e7fd4179 DT |
231 | INIT_LIST_HEAD(&lslist); |
232 | spin_lock_init(&lslist_lock); | |
233 | ||
b4a5d4bc | 234 | dlm_kset = kset_create_and_add("dlm", &dlm_uevent_ops, kernel_kobj); |
d405936b | 235 | if (!dlm_kset) { |
8e24eea7 | 236 | printk(KERN_WARNING "%s: can not create kset\n", __func__); |
d405936b GKH |
237 | return -ENOMEM; |
238 | } | |
239 | return 0; | |
e7fd4179 DT |
240 | } |
241 | ||
242 | void dlm_lockspace_exit(void) | |
243 | { | |
d405936b | 244 | kset_unregister(dlm_kset); |
e7fd4179 DT |
245 | } |
246 | ||
c1dcf65f DT |
247 | static struct dlm_ls *find_ls_to_scan(void) |
248 | { | |
249 | struct dlm_ls *ls; | |
250 | ||
251 | spin_lock(&lslist_lock); | |
252 | list_for_each_entry(ls, &lslist, ls_list) { | |
253 | if (time_after_eq(jiffies, ls->ls_scan_time + | |
254 | dlm_config.ci_scan_secs * HZ)) { | |
255 | spin_unlock(&lslist_lock); | |
256 | return ls; | |
257 | } | |
258 | } | |
259 | spin_unlock(&lslist_lock); | |
260 | return NULL; | |
261 | } | |
262 | ||
e7fd4179 DT |
263 | static int dlm_scand(void *data) |
264 | { | |
265 | struct dlm_ls *ls; | |
266 | ||
267 | while (!kthread_should_stop()) { | |
c1dcf65f DT |
268 | ls = find_ls_to_scan(); |
269 | if (ls) { | |
85e86edf | 270 | if (dlm_lock_recovery_try(ls)) { |
c1dcf65f | 271 | ls->ls_scan_time = jiffies; |
85e86edf | 272 | dlm_scan_rsbs(ls); |
3ae1acf9 | 273 | dlm_scan_timeout(ls); |
c6ff669b | 274 | dlm_scan_waiters(ls); |
85e86edf | 275 | dlm_unlock_recovery(ls); |
c1dcf65f DT |
276 | } else { |
277 | ls->ls_scan_time += HZ; | |
85e86edf | 278 | } |
c6ff669b | 279 | continue; |
85e86edf | 280 | } |
c6ff669b | 281 | schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ); |
e7fd4179 DT |
282 | } |
283 | return 0; | |
284 | } | |
285 | ||
286 | static int dlm_scand_start(void) | |
287 | { | |
288 | struct task_struct *p; | |
289 | int error = 0; | |
290 | ||
291 | p = kthread_run(dlm_scand, NULL, "dlm_scand"); | |
292 | if (IS_ERR(p)) | |
293 | error = PTR_ERR(p); | |
294 | else | |
295 | scand_task = p; | |
296 | return error; | |
297 | } | |
298 | ||
299 | static void dlm_scand_stop(void) | |
300 | { | |
301 | kthread_stop(scand_task); | |
302 | } | |
303 | ||
e7fd4179 DT |
304 | struct dlm_ls *dlm_find_lockspace_global(uint32_t id) |
305 | { | |
306 | struct dlm_ls *ls; | |
307 | ||
308 | spin_lock(&lslist_lock); | |
309 | ||
310 | list_for_each_entry(ls, &lslist, ls_list) { | |
311 | if (ls->ls_global_id == id) { | |
312 | ls->ls_count++; | |
313 | goto out; | |
314 | } | |
315 | } | |
316 | ls = NULL; | |
317 | out: | |
318 | spin_unlock(&lslist_lock); | |
319 | return ls; | |
320 | } | |
321 | ||
597d0cae | 322 | struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace) |
e7fd4179 | 323 | { |
597d0cae | 324 | struct dlm_ls *ls; |
e7fd4179 DT |
325 | |
326 | spin_lock(&lslist_lock); | |
597d0cae DT |
327 | list_for_each_entry(ls, &lslist, ls_list) { |
328 | if (ls->ls_local_handle == lockspace) { | |
329 | ls->ls_count++; | |
330 | goto out; | |
331 | } | |
332 | } | |
333 | ls = NULL; | |
334 | out: | |
335 | spin_unlock(&lslist_lock); | |
336 | return ls; | |
337 | } | |
338 | ||
339 | struct dlm_ls *dlm_find_lockspace_device(int minor) | |
340 | { | |
341 | struct dlm_ls *ls; | |
342 | ||
343 | spin_lock(&lslist_lock); | |
344 | list_for_each_entry(ls, &lslist, ls_list) { | |
345 | if (ls->ls_device.minor == minor) { | |
346 | ls->ls_count++; | |
347 | goto out; | |
348 | } | |
349 | } | |
350 | ls = NULL; | |
351 | out: | |
e7fd4179 DT |
352 | spin_unlock(&lslist_lock); |
353 | return ls; | |
354 | } | |
355 | ||
356 | void dlm_put_lockspace(struct dlm_ls *ls) | |
357 | { | |
358 | spin_lock(&lslist_lock); | |
359 | ls->ls_count--; | |
360 | spin_unlock(&lslist_lock); | |
361 | } | |
362 | ||
363 | static void remove_lockspace(struct dlm_ls *ls) | |
364 | { | |
365 | for (;;) { | |
366 | spin_lock(&lslist_lock); | |
367 | if (ls->ls_count == 0) { | |
0f8e0d9a | 368 | WARN_ON(ls->ls_create_count != 0); |
e7fd4179 DT |
369 | list_del(&ls->ls_list); |
370 | spin_unlock(&lslist_lock); | |
371 | return; | |
372 | } | |
373 | spin_unlock(&lslist_lock); | |
374 | ssleep(1); | |
375 | } | |
376 | } | |
377 | ||
378 | static int threads_start(void) | |
379 | { | |
380 | int error; | |
381 | ||
e7fd4179 DT |
382 | error = dlm_scand_start(); |
383 | if (error) { | |
384 | log_print("cannot start dlm_scand thread %d", error); | |
23e8e1aa | 385 | goto fail; |
e7fd4179 DT |
386 | } |
387 | ||
388 | /* Thread for sending/receiving messages for all lockspace's */ | |
389 | error = dlm_lowcomms_start(); | |
390 | if (error) { | |
391 | log_print("cannot start dlm lowcomms %d", error); | |
392 | goto scand_fail; | |
393 | } | |
394 | ||
395 | return 0; | |
396 | ||
397 | scand_fail: | |
398 | dlm_scand_stop(); | |
e7fd4179 DT |
399 | fail: |
400 | return error; | |
401 | } | |
402 | ||
403 | static void threads_stop(void) | |
404 | { | |
405 | dlm_scand_stop(); | |
406 | dlm_lowcomms_stop(); | |
e7fd4179 DT |
407 | } |
408 | ||
60f98d18 DT |
409 | static int new_lockspace(const char *name, const char *cluster, |
410 | uint32_t flags, int lvblen, | |
411 | const struct dlm_lockspace_ops *ops, void *ops_arg, | |
412 | int *ops_result, dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
413 | { |
414 | struct dlm_ls *ls; | |
0f8e0d9a | 415 | int i, size, error; |
79d72b54 | 416 | int do_unreg = 0; |
60f98d18 | 417 | int namelen = strlen(name); |
e7fd4179 DT |
418 | |
419 | if (namelen > DLM_LOCKSPACE_LEN) | |
420 | return -EINVAL; | |
421 | ||
422 | if (!lvblen || (lvblen % 8)) | |
423 | return -EINVAL; | |
424 | ||
425 | if (!try_module_get(THIS_MODULE)) | |
426 | return -EINVAL; | |
427 | ||
dc68c7ed | 428 | if (!dlm_user_daemon_available()) { |
60f98d18 DT |
429 | log_print("dlm user daemon not available"); |
430 | error = -EUNATCH; | |
431 | goto out; | |
432 | } | |
433 | ||
434 | if (ops && ops_result) { | |
435 | if (!dlm_config.ci_recover_callbacks) | |
436 | *ops_result = -EOPNOTSUPP; | |
437 | else | |
438 | *ops_result = 0; | |
439 | } | |
440 | ||
441 | if (dlm_config.ci_recover_callbacks && cluster && | |
442 | strncmp(cluster, dlm_config.ci_cluster_name, DLM_LOCKSPACE_LEN)) { | |
443 | log_print("dlm cluster name %s mismatch %s", | |
444 | dlm_config.ci_cluster_name, cluster); | |
445 | error = -EBADR; | |
446 | goto out; | |
dc68c7ed DT |
447 | } |
448 | ||
0f8e0d9a DT |
449 | error = 0; |
450 | ||
451 | spin_lock(&lslist_lock); | |
452 | list_for_each_entry(ls, &lslist, ls_list) { | |
453 | WARN_ON(ls->ls_create_count <= 0); | |
454 | if (ls->ls_namelen != namelen) | |
455 | continue; | |
456 | if (memcmp(ls->ls_name, name, namelen)) | |
457 | continue; | |
458 | if (flags & DLM_LSFL_NEWEXCL) { | |
459 | error = -EEXIST; | |
460 | break; | |
461 | } | |
462 | ls->ls_create_count++; | |
8511a272 DT |
463 | *lockspace = ls; |
464 | error = 1; | |
0f8e0d9a | 465 | break; |
e7fd4179 | 466 | } |
0f8e0d9a DT |
467 | spin_unlock(&lslist_lock); |
468 | ||
0f8e0d9a | 469 | if (error) |
8511a272 | 470 | goto out; |
0f8e0d9a DT |
471 | |
472 | error = -ENOMEM; | |
e7fd4179 | 473 | |
573c24c4 | 474 | ls = kzalloc(sizeof(struct dlm_ls) + namelen, GFP_NOFS); |
e7fd4179 DT |
475 | if (!ls) |
476 | goto out; | |
e7fd4179 DT |
477 | memcpy(ls->ls_name, name, namelen); |
478 | ls->ls_namelen = namelen; | |
e7fd4179 DT |
479 | ls->ls_lvblen = lvblen; |
480 | ls->ls_count = 0; | |
481 | ls->ls_flags = 0; | |
c1dcf65f | 482 | ls->ls_scan_time = jiffies; |
e7fd4179 | 483 | |
60f98d18 DT |
484 | if (ops && dlm_config.ci_recover_callbacks) { |
485 | ls->ls_ops = ops; | |
486 | ls->ls_ops_arg = ops_arg; | |
487 | } | |
488 | ||
3ae1acf9 DT |
489 | if (flags & DLM_LSFL_TIMEWARN) |
490 | set_bit(LSFL_TIMEWARN, &ls->ls_flags); | |
3ae1acf9 | 491 | |
fad59c13 | 492 | /* ls_exflags are forced to match among nodes, and we don't |
0f8e0d9a DT |
493 | need to require all nodes to have some flags set */ |
494 | ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS | | |
495 | DLM_LSFL_NEWEXCL)); | |
fad59c13 | 496 | |
68c817a1 | 497 | size = dlm_config.ci_rsbtbl_size; |
e7fd4179 DT |
498 | ls->ls_rsbtbl_size = size; |
499 | ||
c282af49 | 500 | ls->ls_rsbtbl = vmalloc(sizeof(struct dlm_rsbtable) * size); |
e7fd4179 DT |
501 | if (!ls->ls_rsbtbl) |
502 | goto out_lsfree; | |
503 | for (i = 0; i < size; i++) { | |
9beb3bf5 BP |
504 | ls->ls_rsbtbl[i].keep.rb_node = NULL; |
505 | ls->ls_rsbtbl[i].toss.rb_node = NULL; | |
c7be761a | 506 | spin_lock_init(&ls->ls_rsbtbl[i].lock); |
e7fd4179 DT |
507 | } |
508 | ||
3d6aa675 DT |
509 | idr_init(&ls->ls_lkbidr); |
510 | spin_lock_init(&ls->ls_lkbidr_spin); | |
e7fd4179 | 511 | |
68c817a1 | 512 | size = dlm_config.ci_dirtbl_size; |
e7fd4179 DT |
513 | ls->ls_dirtbl_size = size; |
514 | ||
c282af49 | 515 | ls->ls_dirtbl = vmalloc(sizeof(struct dlm_dirtable) * size); |
e7fd4179 DT |
516 | if (!ls->ls_dirtbl) |
517 | goto out_lkbfree; | |
518 | for (i = 0; i < size; i++) { | |
519 | INIT_LIST_HEAD(&ls->ls_dirtbl[i].list); | |
305a47b1 | 520 | spin_lock_init(&ls->ls_dirtbl[i].lock); |
e7fd4179 DT |
521 | } |
522 | ||
523 | INIT_LIST_HEAD(&ls->ls_waiters); | |
90135925 | 524 | mutex_init(&ls->ls_waiters_mutex); |
ef0c2bb0 DT |
525 | INIT_LIST_HEAD(&ls->ls_orphans); |
526 | mutex_init(&ls->ls_orphans_mutex); | |
3ae1acf9 DT |
527 | INIT_LIST_HEAD(&ls->ls_timeout); |
528 | mutex_init(&ls->ls_timeout_mutex); | |
e7fd4179 | 529 | |
3881ac04 DT |
530 | INIT_LIST_HEAD(&ls->ls_new_rsb); |
531 | spin_lock_init(&ls->ls_new_rsb_spin); | |
532 | ||
e7fd4179 DT |
533 | INIT_LIST_HEAD(&ls->ls_nodes); |
534 | INIT_LIST_HEAD(&ls->ls_nodes_gone); | |
535 | ls->ls_num_nodes = 0; | |
536 | ls->ls_low_nodeid = 0; | |
537 | ls->ls_total_weight = 0; | |
538 | ls->ls_node_array = NULL; | |
539 | ||
540 | memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb)); | |
541 | ls->ls_stub_rsb.res_ls = ls; | |
542 | ||
5de6319b DT |
543 | ls->ls_debug_rsb_dentry = NULL; |
544 | ls->ls_debug_waiters_dentry = NULL; | |
e7fd4179 DT |
545 | |
546 | init_waitqueue_head(&ls->ls_uevent_wait); | |
547 | ls->ls_uevent_result = 0; | |
8b0e7b2c DT |
548 | init_completion(&ls->ls_members_done); |
549 | ls->ls_members_result = -1; | |
e7fd4179 | 550 | |
23e8e1aa DT |
551 | mutex_init(&ls->ls_cb_mutex); |
552 | INIT_LIST_HEAD(&ls->ls_cb_delay); | |
553 | ||
e7fd4179 | 554 | ls->ls_recoverd_task = NULL; |
90135925 | 555 | mutex_init(&ls->ls_recoverd_active); |
e7fd4179 | 556 | spin_lock_init(&ls->ls_recover_lock); |
98f176fb DT |
557 | spin_lock_init(&ls->ls_rcom_spin); |
558 | get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t)); | |
e7fd4179 DT |
559 | ls->ls_recover_status = 0; |
560 | ls->ls_recover_seq = 0; | |
561 | ls->ls_recover_args = NULL; | |
562 | init_rwsem(&ls->ls_in_recovery); | |
c36258b5 | 563 | init_rwsem(&ls->ls_recv_active); |
e7fd4179 | 564 | INIT_LIST_HEAD(&ls->ls_requestqueue); |
90135925 | 565 | mutex_init(&ls->ls_requestqueue_mutex); |
597d0cae | 566 | mutex_init(&ls->ls_clear_proc_locks); |
e7fd4179 | 567 | |
573c24c4 | 568 | ls->ls_recover_buf = kmalloc(dlm_config.ci_buffer_size, GFP_NOFS); |
e7fd4179 DT |
569 | if (!ls->ls_recover_buf) |
570 | goto out_dirfree; | |
571 | ||
757a4271 DT |
572 | ls->ls_slot = 0; |
573 | ls->ls_num_slots = 0; | |
574 | ls->ls_slots_size = 0; | |
575 | ls->ls_slots = NULL; | |
576 | ||
e7fd4179 DT |
577 | INIT_LIST_HEAD(&ls->ls_recover_list); |
578 | spin_lock_init(&ls->ls_recover_list_lock); | |
579 | ls->ls_recover_list_count = 0; | |
597d0cae | 580 | ls->ls_local_handle = ls; |
e7fd4179 DT |
581 | init_waitqueue_head(&ls->ls_wait_general); |
582 | INIT_LIST_HEAD(&ls->ls_root_list); | |
583 | init_rwsem(&ls->ls_root_sem); | |
584 | ||
585 | down_write(&ls->ls_in_recovery); | |
586 | ||
5f88f1ea | 587 | spin_lock(&lslist_lock); |
0f8e0d9a | 588 | ls->ls_create_count = 1; |
5f88f1ea DT |
589 | list_add(&ls->ls_list, &lslist); |
590 | spin_unlock(&lslist_lock); | |
591 | ||
23e8e1aa DT |
592 | if (flags & DLM_LSFL_FS) { |
593 | error = dlm_callback_start(ls); | |
594 | if (error) { | |
595 | log_error(ls, "can't start dlm_callback %d", error); | |
596 | goto out_delist; | |
597 | } | |
598 | } | |
599 | ||
5f88f1ea | 600 | /* needs to find ls in lslist */ |
e7fd4179 DT |
601 | error = dlm_recoverd_start(ls); |
602 | if (error) { | |
603 | log_error(ls, "can't start dlm_recoverd %d", error); | |
23e8e1aa | 604 | goto out_callback; |
e7fd4179 DT |
605 | } |
606 | ||
901195ed GKH |
607 | ls->ls_kobj.kset = dlm_kset; |
608 | error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL, | |
609 | "%s", ls->ls_name); | |
e7fd4179 | 610 | if (error) |
23e8e1aa | 611 | goto out_recoverd; |
901195ed | 612 | kobject_uevent(&ls->ls_kobj, KOBJ_ADD); |
79d72b54 DT |
613 | |
614 | /* let kobject handle freeing of ls if there's an error */ | |
615 | do_unreg = 1; | |
e7fd4179 | 616 | |
8b0e7b2c DT |
617 | /* This uevent triggers dlm_controld in userspace to add us to the |
618 | group of nodes that are members of this lockspace (managed by the | |
619 | cluster infrastructure.) Once it's done that, it tells us who the | |
620 | current lockspace members are (via configfs) and then tells the | |
621 | lockspace to start running (via sysfs) in dlm_ls_start(). */ | |
622 | ||
e7fd4179 DT |
623 | error = do_uevent(ls, 1); |
624 | if (error) | |
23e8e1aa | 625 | goto out_recoverd; |
79d72b54 | 626 | |
8b0e7b2c DT |
627 | wait_for_completion(&ls->ls_members_done); |
628 | error = ls->ls_members_result; | |
629 | if (error) | |
630 | goto out_members; | |
631 | ||
79d72b54 DT |
632 | dlm_create_debug_file(ls); |
633 | ||
634 | log_debug(ls, "join complete"); | |
e7fd4179 DT |
635 | *lockspace = ls; |
636 | return 0; | |
637 | ||
8b0e7b2c DT |
638 | out_members: |
639 | do_uevent(ls, 0); | |
640 | dlm_clear_members(ls); | |
641 | kfree(ls->ls_node_array); | |
23e8e1aa | 642 | out_recoverd: |
5f88f1ea | 643 | dlm_recoverd_stop(ls); |
23e8e1aa DT |
644 | out_callback: |
645 | dlm_callback_stop(ls); | |
79d72b54 | 646 | out_delist: |
e7fd4179 DT |
647 | spin_lock(&lslist_lock); |
648 | list_del(&ls->ls_list); | |
649 | spin_unlock(&lslist_lock); | |
e7fd4179 DT |
650 | kfree(ls->ls_recover_buf); |
651 | out_dirfree: | |
c282af49 | 652 | vfree(ls->ls_dirtbl); |
e7fd4179 | 653 | out_lkbfree: |
3d6aa675 | 654 | idr_destroy(&ls->ls_lkbidr); |
c282af49 | 655 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 656 | out_lsfree: |
79d72b54 | 657 | if (do_unreg) |
197b12d6 | 658 | kobject_put(&ls->ls_kobj); |
79d72b54 DT |
659 | else |
660 | kfree(ls); | |
e7fd4179 DT |
661 | out: |
662 | module_put(THIS_MODULE); | |
663 | return error; | |
664 | } | |
665 | ||
60f98d18 DT |
666 | int dlm_new_lockspace(const char *name, const char *cluster, |
667 | uint32_t flags, int lvblen, | |
668 | const struct dlm_lockspace_ops *ops, void *ops_arg, | |
669 | int *ops_result, dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
670 | { |
671 | int error = 0; | |
672 | ||
90135925 | 673 | mutex_lock(&ls_lock); |
e7fd4179 DT |
674 | if (!ls_count) |
675 | error = threads_start(); | |
676 | if (error) | |
677 | goto out; | |
678 | ||
60f98d18 DT |
679 | error = new_lockspace(name, cluster, flags, lvblen, ops, ops_arg, |
680 | ops_result, lockspace); | |
e7fd4179 DT |
681 | if (!error) |
682 | ls_count++; | |
8511a272 DT |
683 | if (error > 0) |
684 | error = 0; | |
685 | if (!ls_count) | |
8b0e7b2c | 686 | threads_stop(); |
e7fd4179 | 687 | out: |
90135925 | 688 | mutex_unlock(&ls_lock); |
e7fd4179 DT |
689 | return error; |
690 | } | |
691 | ||
3d6aa675 | 692 | static int lkb_idr_is_local(int id, void *p, void *data) |
e7fd4179 | 693 | { |
3d6aa675 DT |
694 | struct dlm_lkb *lkb = p; |
695 | ||
696 | if (!lkb->lkb_nodeid) | |
697 | return 1; | |
698 | return 0; | |
699 | } | |
700 | ||
701 | static int lkb_idr_is_any(int id, void *p, void *data) | |
702 | { | |
703 | return 1; | |
704 | } | |
705 | ||
706 | static int lkb_idr_free(int id, void *p, void *data) | |
707 | { | |
708 | struct dlm_lkb *lkb = p; | |
709 | ||
3d6aa675 DT |
710 | if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY) |
711 | dlm_free_lvb(lkb->lkb_lvbptr); | |
712 | ||
713 | dlm_free_lkb(lkb); | |
714 | return 0; | |
715 | } | |
716 | ||
717 | /* NOTE: We check the lkbidr here rather than the resource table. | |
718 | This is because there may be LKBs queued as ASTs that have been unlinked | |
719 | from their RSBs and are pending deletion once the AST has been delivered */ | |
720 | ||
721 | static int lockspace_busy(struct dlm_ls *ls, int force) | |
722 | { | |
723 | int rv; | |
724 | ||
725 | spin_lock(&ls->ls_lkbidr_spin); | |
726 | if (force == 0) { | |
727 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls); | |
728 | } else if (force == 1) { | |
729 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_local, ls); | |
730 | } else { | |
731 | rv = 0; | |
e7fd4179 | 732 | } |
3d6aa675 DT |
733 | spin_unlock(&ls->ls_lkbidr_spin); |
734 | return rv; | |
e7fd4179 DT |
735 | } |
736 | ||
737 | static int release_lockspace(struct dlm_ls *ls, int force) | |
738 | { | |
e7fd4179 | 739 | struct dlm_rsb *rsb; |
9beb3bf5 | 740 | struct rb_node *n; |
0f8e0d9a DT |
741 | int i, busy, rv; |
742 | ||
3d6aa675 | 743 | busy = lockspace_busy(ls, force); |
0f8e0d9a DT |
744 | |
745 | spin_lock(&lslist_lock); | |
746 | if (ls->ls_create_count == 1) { | |
3d6aa675 | 747 | if (busy) { |
0f8e0d9a | 748 | rv = -EBUSY; |
3d6aa675 | 749 | } else { |
0f8e0d9a DT |
750 | /* remove_lockspace takes ls off lslist */ |
751 | ls->ls_create_count = 0; | |
752 | rv = 0; | |
753 | } | |
754 | } else if (ls->ls_create_count > 1) { | |
755 | rv = --ls->ls_create_count; | |
756 | } else { | |
757 | rv = -EINVAL; | |
758 | } | |
759 | spin_unlock(&lslist_lock); | |
760 | ||
761 | if (rv) { | |
762 | log_debug(ls, "release_lockspace no remove %d", rv); | |
763 | return rv; | |
764 | } | |
e7fd4179 | 765 | |
0f8e0d9a | 766 | dlm_device_deregister(ls); |
e7fd4179 | 767 | |
dc68c7ed | 768 | if (force < 3 && dlm_user_daemon_available()) |
e7fd4179 DT |
769 | do_uevent(ls, 0); |
770 | ||
771 | dlm_recoverd_stop(ls); | |
772 | ||
23e8e1aa DT |
773 | dlm_callback_stop(ls); |
774 | ||
e7fd4179 DT |
775 | remove_lockspace(ls); |
776 | ||
777 | dlm_delete_debug_file(ls); | |
778 | ||
e7fd4179 DT |
779 | kfree(ls->ls_recover_buf); |
780 | ||
781 | /* | |
782 | * Free direntry structs. | |
783 | */ | |
784 | ||
785 | dlm_dir_clear(ls); | |
c282af49 | 786 | vfree(ls->ls_dirtbl); |
e7fd4179 DT |
787 | |
788 | /* | |
3d6aa675 | 789 | * Free all lkb's in idr |
e7fd4179 DT |
790 | */ |
791 | ||
3d6aa675 DT |
792 | idr_for_each(&ls->ls_lkbidr, lkb_idr_free, ls); |
793 | idr_remove_all(&ls->ls_lkbidr); | |
794 | idr_destroy(&ls->ls_lkbidr); | |
e7fd4179 | 795 | |
e7fd4179 DT |
796 | /* |
797 | * Free all rsb's on rsbtbl[] lists | |
798 | */ | |
799 | ||
800 | for (i = 0; i < ls->ls_rsbtbl_size; i++) { | |
9beb3bf5 BP |
801 | while ((n = rb_first(&ls->ls_rsbtbl[i].keep))) { |
802 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
803 | rb_erase(n, &ls->ls_rsbtbl[i].keep); | |
52bda2b5 | 804 | dlm_free_rsb(rsb); |
e7fd4179 DT |
805 | } |
806 | ||
9beb3bf5 BP |
807 | while ((n = rb_first(&ls->ls_rsbtbl[i].toss))) { |
808 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
809 | rb_erase(n, &ls->ls_rsbtbl[i].toss); | |
52bda2b5 | 810 | dlm_free_rsb(rsb); |
e7fd4179 DT |
811 | } |
812 | } | |
813 | ||
c282af49 | 814 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 815 | |
3881ac04 DT |
816 | while (!list_empty(&ls->ls_new_rsb)) { |
817 | rsb = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb, | |
818 | res_hashchain); | |
819 | list_del(&rsb->res_hashchain); | |
820 | dlm_free_rsb(rsb); | |
821 | } | |
822 | ||
e7fd4179 DT |
823 | /* |
824 | * Free structures on any other lists | |
825 | */ | |
826 | ||
2896ee37 | 827 | dlm_purge_requestqueue(ls); |
e7fd4179 DT |
828 | kfree(ls->ls_recover_args); |
829 | dlm_clear_free_entries(ls); | |
830 | dlm_clear_members(ls); | |
831 | dlm_clear_members_gone(ls); | |
832 | kfree(ls->ls_node_array); | |
0f8e0d9a | 833 | log_debug(ls, "release_lockspace final free"); |
197b12d6 | 834 | kobject_put(&ls->ls_kobj); |
79d72b54 | 835 | /* The ls structure will be freed when the kobject is done with */ |
e7fd4179 | 836 | |
e7fd4179 DT |
837 | module_put(THIS_MODULE); |
838 | return 0; | |
839 | } | |
840 | ||
841 | /* | |
842 | * Called when a system has released all its locks and is not going to use the | |
843 | * lockspace any longer. We free everything we're managing for this lockspace. | |
844 | * Remaining nodes will go through the recovery process as if we'd died. The | |
845 | * lockspace must continue to function as usual, participating in recoveries, | |
846 | * until this returns. | |
847 | * | |
848 | * Force has 4 possible values: | |
849 | * 0 - don't destroy locksapce if it has any LKBs | |
850 | * 1 - destroy lockspace if it has remote LKBs but not if it has local LKBs | |
851 | * 2 - destroy lockspace regardless of LKBs | |
852 | * 3 - destroy lockspace as part of a forced shutdown | |
853 | */ | |
854 | ||
855 | int dlm_release_lockspace(void *lockspace, int force) | |
856 | { | |
857 | struct dlm_ls *ls; | |
0f8e0d9a | 858 | int error; |
e7fd4179 DT |
859 | |
860 | ls = dlm_find_lockspace_local(lockspace); | |
861 | if (!ls) | |
862 | return -EINVAL; | |
863 | dlm_put_lockspace(ls); | |
0f8e0d9a DT |
864 | |
865 | mutex_lock(&ls_lock); | |
866 | error = release_lockspace(ls, force); | |
867 | if (!error) | |
868 | ls_count--; | |
278afcbf | 869 | if (!ls_count) |
0f8e0d9a DT |
870 | threads_stop(); |
871 | mutex_unlock(&ls_lock); | |
872 | ||
873 | return error; | |
e7fd4179 DT |
874 | } |
875 | ||
dc68c7ed DT |
876 | void dlm_stop_lockspaces(void) |
877 | { | |
878 | struct dlm_ls *ls; | |
879 | ||
880 | restart: | |
881 | spin_lock(&lslist_lock); | |
882 | list_for_each_entry(ls, &lslist, ls_list) { | |
883 | if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) | |
884 | continue; | |
885 | spin_unlock(&lslist_lock); | |
886 | log_error(ls, "no userland control daemon, stopping lockspace"); | |
887 | dlm_ls_stop(ls); | |
888 | goto restart; | |
889 | } | |
890 | spin_unlock(&lslist_lock); | |
891 | } | |
892 |