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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 | ||
7963b8a5 PG |
14 | #include <linux/module.h> |
15 | ||
e7fd4179 DT |
16 | #include "dlm_internal.h" |
17 | #include "lockspace.h" | |
18 | #include "member.h" | |
19 | #include "recoverd.h" | |
e7fd4179 DT |
20 | #include "dir.h" |
21 | #include "lowcomms.h" | |
22 | #include "config.h" | |
23 | #include "memory.h" | |
24 | #include "lock.h" | |
c56b39cd | 25 | #include "recover.h" |
2896ee37 | 26 | #include "requestqueue.h" |
0f8e0d9a | 27 | #include "user.h" |
23e8e1aa | 28 | #include "ast.h" |
e7fd4179 | 29 | |
e7fd4179 | 30 | static int ls_count; |
90135925 | 31 | static struct mutex ls_lock; |
e7fd4179 DT |
32 | static struct list_head lslist; |
33 | static spinlock_t lslist_lock; | |
34 | static struct task_struct * scand_task; | |
35 | ||
36 | ||
37 | static ssize_t dlm_control_store(struct dlm_ls *ls, const char *buf, size_t len) | |
38 | { | |
39 | ssize_t ret = len; | |
6edb5687 FF |
40 | int n; |
41 | int rc = kstrtoint(buf, 0, &n); | |
e7fd4179 | 42 | |
6edb5687 FF |
43 | if (rc) |
44 | return rc; | |
e2de7f56 PC |
45 | ls = dlm_find_lockspace_local(ls->ls_local_handle); |
46 | if (!ls) | |
47 | return -EINVAL; | |
48 | ||
e7fd4179 DT |
49 | switch (n) { |
50 | case 0: | |
51 | dlm_ls_stop(ls); | |
52 | break; | |
53 | case 1: | |
54 | dlm_ls_start(ls); | |
55 | break; | |
56 | default: | |
57 | ret = -EINVAL; | |
58 | } | |
e2de7f56 | 59 | dlm_put_lockspace(ls); |
e7fd4179 DT |
60 | return ret; |
61 | } | |
62 | ||
63 | static ssize_t dlm_event_store(struct dlm_ls *ls, const char *buf, size_t len) | |
64 | { | |
6edb5687 FF |
65 | int rc = kstrtoint(buf, 0, &ls->ls_uevent_result); |
66 | ||
67 | if (rc) | |
68 | return rc; | |
e7fd4179 DT |
69 | set_bit(LSFL_UEVENT_WAIT, &ls->ls_flags); |
70 | wake_up(&ls->ls_uevent_wait); | |
71 | return len; | |
72 | } | |
73 | ||
74 | static ssize_t dlm_id_show(struct dlm_ls *ls, char *buf) | |
75 | { | |
a1d144c7 | 76 | return snprintf(buf, PAGE_SIZE, "%u\n", ls->ls_global_id); |
e7fd4179 DT |
77 | } |
78 | ||
79 | static ssize_t dlm_id_store(struct dlm_ls *ls, const char *buf, size_t len) | |
80 | { | |
6edb5687 FF |
81 | int rc = kstrtouint(buf, 0, &ls->ls_global_id); |
82 | ||
83 | if (rc) | |
84 | return rc; | |
e7fd4179 DT |
85 | return len; |
86 | } | |
87 | ||
4875647a DT |
88 | static ssize_t dlm_nodir_show(struct dlm_ls *ls, char *buf) |
89 | { | |
90 | return snprintf(buf, PAGE_SIZE, "%u\n", dlm_no_directory(ls)); | |
91 | } | |
92 | ||
93 | static ssize_t dlm_nodir_store(struct dlm_ls *ls, const char *buf, size_t len) | |
94 | { | |
6edb5687 FF |
95 | int val; |
96 | int rc = kstrtoint(buf, 0, &val); | |
97 | ||
98 | if (rc) | |
99 | return rc; | |
4875647a DT |
100 | if (val == 1) |
101 | set_bit(LSFL_NODIR, &ls->ls_flags); | |
102 | return len; | |
103 | } | |
104 | ||
c56b39cd DT |
105 | static ssize_t dlm_recover_status_show(struct dlm_ls *ls, char *buf) |
106 | { | |
107 | uint32_t status = dlm_recover_status(ls); | |
a1d144c7 | 108 | return snprintf(buf, PAGE_SIZE, "%x\n", status); |
c56b39cd DT |
109 | } |
110 | ||
faa0f267 DT |
111 | static ssize_t dlm_recover_nodeid_show(struct dlm_ls *ls, char *buf) |
112 | { | |
a1d144c7 | 113 | return snprintf(buf, PAGE_SIZE, "%d\n", ls->ls_recover_nodeid); |
faa0f267 DT |
114 | } |
115 | ||
e7fd4179 DT |
116 | struct dlm_attr { |
117 | struct attribute attr; | |
118 | ssize_t (*show)(struct dlm_ls *, char *); | |
119 | ssize_t (*store)(struct dlm_ls *, const char *, size_t); | |
120 | }; | |
121 | ||
122 | static struct dlm_attr dlm_attr_control = { | |
123 | .attr = {.name = "control", .mode = S_IWUSR}, | |
124 | .store = dlm_control_store | |
125 | }; | |
126 | ||
127 | static struct dlm_attr dlm_attr_event = { | |
128 | .attr = {.name = "event_done", .mode = S_IWUSR}, | |
129 | .store = dlm_event_store | |
130 | }; | |
131 | ||
132 | static struct dlm_attr dlm_attr_id = { | |
133 | .attr = {.name = "id", .mode = S_IRUGO | S_IWUSR}, | |
134 | .show = dlm_id_show, | |
135 | .store = dlm_id_store | |
136 | }; | |
137 | ||
4875647a DT |
138 | static struct dlm_attr dlm_attr_nodir = { |
139 | .attr = {.name = "nodir", .mode = S_IRUGO | S_IWUSR}, | |
140 | .show = dlm_nodir_show, | |
141 | .store = dlm_nodir_store | |
142 | }; | |
143 | ||
c56b39cd DT |
144 | static struct dlm_attr dlm_attr_recover_status = { |
145 | .attr = {.name = "recover_status", .mode = S_IRUGO}, | |
146 | .show = dlm_recover_status_show | |
147 | }; | |
148 | ||
faa0f267 DT |
149 | static struct dlm_attr dlm_attr_recover_nodeid = { |
150 | .attr = {.name = "recover_nodeid", .mode = S_IRUGO}, | |
151 | .show = dlm_recover_nodeid_show | |
152 | }; | |
153 | ||
e7fd4179 DT |
154 | static struct attribute *dlm_attrs[] = { |
155 | &dlm_attr_control.attr, | |
156 | &dlm_attr_event.attr, | |
157 | &dlm_attr_id.attr, | |
4875647a | 158 | &dlm_attr_nodir.attr, |
c56b39cd | 159 | &dlm_attr_recover_status.attr, |
faa0f267 | 160 | &dlm_attr_recover_nodeid.attr, |
e7fd4179 DT |
161 | NULL, |
162 | }; | |
163 | ||
164 | static ssize_t dlm_attr_show(struct kobject *kobj, struct attribute *attr, | |
165 | char *buf) | |
166 | { | |
167 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
168 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
169 | return a->show ? a->show(ls, buf) : 0; | |
170 | } | |
171 | ||
172 | static ssize_t dlm_attr_store(struct kobject *kobj, struct attribute *attr, | |
173 | const char *buf, size_t len) | |
174 | { | |
175 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
176 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
177 | return a->store ? a->store(ls, buf, len) : len; | |
178 | } | |
179 | ||
ba542e3b PC |
180 | static void lockspace_kobj_release(struct kobject *k) |
181 | { | |
182 | struct dlm_ls *ls = container_of(k, struct dlm_ls, ls_kobj); | |
183 | kfree(ls); | |
184 | } | |
185 | ||
52cf25d0 | 186 | static const struct sysfs_ops dlm_attr_ops = { |
e7fd4179 DT |
187 | .show = dlm_attr_show, |
188 | .store = dlm_attr_store, | |
189 | }; | |
190 | ||
191 | static struct kobj_type dlm_ktype = { | |
192 | .default_attrs = dlm_attrs, | |
193 | .sysfs_ops = &dlm_attr_ops, | |
ba542e3b | 194 | .release = lockspace_kobj_release, |
e7fd4179 DT |
195 | }; |
196 | ||
d405936b | 197 | static struct kset *dlm_kset; |
e7fd4179 | 198 | |
e7fd4179 DT |
199 | static int do_uevent(struct dlm_ls *ls, int in) |
200 | { | |
201 | int error; | |
202 | ||
203 | if (in) | |
204 | kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE); | |
205 | else | |
206 | kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE); | |
207 | ||
075f0177 | 208 | log_rinfo(ls, "%s the lockspace group...", in ? "joining" : "leaving"); |
8b0e7b2c DT |
209 | |
210 | /* dlm_controld will see the uevent, do the necessary group management | |
211 | and then write to sysfs to wake us */ | |
212 | ||
e7fd4179 DT |
213 | error = wait_event_interruptible(ls->ls_uevent_wait, |
214 | test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags)); | |
8b0e7b2c | 215 | |
075f0177 | 216 | log_rinfo(ls, "group event done %d %d", error, ls->ls_uevent_result); |
8b0e7b2c | 217 | |
e7fd4179 DT |
218 | if (error) |
219 | goto out; | |
220 | ||
221 | error = ls->ls_uevent_result; | |
222 | out: | |
8b0e7b2c DT |
223 | if (error) |
224 | log_error(ls, "group %s failed %d %d", in ? "join" : "leave", | |
225 | error, ls->ls_uevent_result); | |
e7fd4179 DT |
226 | return error; |
227 | } | |
228 | ||
b4a5d4bc SW |
229 | static int dlm_uevent(struct kset *kset, struct kobject *kobj, |
230 | struct kobj_uevent_env *env) | |
231 | { | |
232 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
233 | ||
234 | add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name); | |
235 | return 0; | |
236 | } | |
237 | ||
417f7c59 | 238 | static const struct kset_uevent_ops dlm_uevent_ops = { |
b4a5d4bc SW |
239 | .uevent = dlm_uevent, |
240 | }; | |
e7fd4179 | 241 | |
30727174 | 242 | int __init dlm_lockspace_init(void) |
e7fd4179 | 243 | { |
e7fd4179 | 244 | ls_count = 0; |
90135925 | 245 | mutex_init(&ls_lock); |
e7fd4179 DT |
246 | INIT_LIST_HEAD(&lslist); |
247 | spin_lock_init(&lslist_lock); | |
248 | ||
b4a5d4bc | 249 | dlm_kset = kset_create_and_add("dlm", &dlm_uevent_ops, kernel_kobj); |
d405936b | 250 | if (!dlm_kset) { |
8e24eea7 | 251 | printk(KERN_WARNING "%s: can not create kset\n", __func__); |
d405936b GKH |
252 | return -ENOMEM; |
253 | } | |
254 | return 0; | |
e7fd4179 DT |
255 | } |
256 | ||
257 | void dlm_lockspace_exit(void) | |
258 | { | |
d405936b | 259 | kset_unregister(dlm_kset); |
e7fd4179 DT |
260 | } |
261 | ||
c1dcf65f DT |
262 | static struct dlm_ls *find_ls_to_scan(void) |
263 | { | |
264 | struct dlm_ls *ls; | |
265 | ||
266 | spin_lock(&lslist_lock); | |
267 | list_for_each_entry(ls, &lslist, ls_list) { | |
268 | if (time_after_eq(jiffies, ls->ls_scan_time + | |
269 | dlm_config.ci_scan_secs * HZ)) { | |
270 | spin_unlock(&lslist_lock); | |
271 | return ls; | |
272 | } | |
273 | } | |
274 | spin_unlock(&lslist_lock); | |
275 | return NULL; | |
276 | } | |
277 | ||
e7fd4179 DT |
278 | static int dlm_scand(void *data) |
279 | { | |
280 | struct dlm_ls *ls; | |
281 | ||
282 | while (!kthread_should_stop()) { | |
c1dcf65f DT |
283 | ls = find_ls_to_scan(); |
284 | if (ls) { | |
85e86edf | 285 | if (dlm_lock_recovery_try(ls)) { |
c1dcf65f | 286 | ls->ls_scan_time = jiffies; |
85e86edf | 287 | dlm_scan_rsbs(ls); |
3ae1acf9 | 288 | dlm_scan_timeout(ls); |
c6ff669b | 289 | dlm_scan_waiters(ls); |
85e86edf | 290 | dlm_unlock_recovery(ls); |
c1dcf65f DT |
291 | } else { |
292 | ls->ls_scan_time += HZ; | |
85e86edf | 293 | } |
c6ff669b | 294 | continue; |
85e86edf | 295 | } |
c6ff669b | 296 | schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ); |
e7fd4179 DT |
297 | } |
298 | return 0; | |
299 | } | |
300 | ||
301 | static int dlm_scand_start(void) | |
302 | { | |
303 | struct task_struct *p; | |
304 | int error = 0; | |
305 | ||
306 | p = kthread_run(dlm_scand, NULL, "dlm_scand"); | |
307 | if (IS_ERR(p)) | |
308 | error = PTR_ERR(p); | |
309 | else | |
310 | scand_task = p; | |
311 | return error; | |
312 | } | |
313 | ||
314 | static void dlm_scand_stop(void) | |
315 | { | |
316 | kthread_stop(scand_task); | |
317 | } | |
318 | ||
e7fd4179 DT |
319 | struct dlm_ls *dlm_find_lockspace_global(uint32_t id) |
320 | { | |
321 | struct dlm_ls *ls; | |
322 | ||
323 | spin_lock(&lslist_lock); | |
324 | ||
325 | list_for_each_entry(ls, &lslist, ls_list) { | |
326 | if (ls->ls_global_id == id) { | |
327 | ls->ls_count++; | |
328 | goto out; | |
329 | } | |
330 | } | |
331 | ls = NULL; | |
332 | out: | |
333 | spin_unlock(&lslist_lock); | |
334 | return ls; | |
335 | } | |
336 | ||
597d0cae | 337 | struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace) |
e7fd4179 | 338 | { |
597d0cae | 339 | struct dlm_ls *ls; |
e7fd4179 DT |
340 | |
341 | spin_lock(&lslist_lock); | |
597d0cae DT |
342 | list_for_each_entry(ls, &lslist, ls_list) { |
343 | if (ls->ls_local_handle == lockspace) { | |
344 | ls->ls_count++; | |
345 | goto out; | |
346 | } | |
347 | } | |
348 | ls = NULL; | |
349 | out: | |
350 | spin_unlock(&lslist_lock); | |
351 | return ls; | |
352 | } | |
353 | ||
354 | struct dlm_ls *dlm_find_lockspace_device(int minor) | |
355 | { | |
356 | struct dlm_ls *ls; | |
357 | ||
358 | spin_lock(&lslist_lock); | |
359 | list_for_each_entry(ls, &lslist, ls_list) { | |
360 | if (ls->ls_device.minor == minor) { | |
361 | ls->ls_count++; | |
362 | goto out; | |
363 | } | |
364 | } | |
365 | ls = NULL; | |
366 | out: | |
e7fd4179 DT |
367 | spin_unlock(&lslist_lock); |
368 | return ls; | |
369 | } | |
370 | ||
371 | void dlm_put_lockspace(struct dlm_ls *ls) | |
372 | { | |
373 | spin_lock(&lslist_lock); | |
374 | ls->ls_count--; | |
375 | spin_unlock(&lslist_lock); | |
376 | } | |
377 | ||
378 | static void remove_lockspace(struct dlm_ls *ls) | |
379 | { | |
380 | for (;;) { | |
381 | spin_lock(&lslist_lock); | |
382 | if (ls->ls_count == 0) { | |
0f8e0d9a | 383 | WARN_ON(ls->ls_create_count != 0); |
e7fd4179 DT |
384 | list_del(&ls->ls_list); |
385 | spin_unlock(&lslist_lock); | |
386 | return; | |
387 | } | |
388 | spin_unlock(&lslist_lock); | |
389 | ssleep(1); | |
390 | } | |
391 | } | |
392 | ||
393 | static int threads_start(void) | |
394 | { | |
395 | int error; | |
396 | ||
e7fd4179 DT |
397 | error = dlm_scand_start(); |
398 | if (error) { | |
399 | log_print("cannot start dlm_scand thread %d", error); | |
23e8e1aa | 400 | goto fail; |
e7fd4179 DT |
401 | } |
402 | ||
403 | /* Thread for sending/receiving messages for all lockspace's */ | |
404 | error = dlm_lowcomms_start(); | |
405 | if (error) { | |
406 | log_print("cannot start dlm lowcomms %d", error); | |
407 | goto scand_fail; | |
408 | } | |
409 | ||
410 | return 0; | |
411 | ||
412 | scand_fail: | |
413 | dlm_scand_stop(); | |
e7fd4179 DT |
414 | fail: |
415 | return error; | |
416 | } | |
417 | ||
418 | static void threads_stop(void) | |
419 | { | |
420 | dlm_scand_stop(); | |
421 | dlm_lowcomms_stop(); | |
e7fd4179 DT |
422 | } |
423 | ||
60f98d18 DT |
424 | static int new_lockspace(const char *name, const char *cluster, |
425 | uint32_t flags, int lvblen, | |
426 | const struct dlm_lockspace_ops *ops, void *ops_arg, | |
427 | int *ops_result, dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
428 | { |
429 | struct dlm_ls *ls; | |
0f8e0d9a | 430 | int i, size, error; |
79d72b54 | 431 | int do_unreg = 0; |
60f98d18 | 432 | int namelen = strlen(name); |
e7fd4179 | 433 | |
3f0806d2 | 434 | if (namelen > DLM_LOCKSPACE_LEN || namelen == 0) |
e7fd4179 DT |
435 | return -EINVAL; |
436 | ||
437 | if (!lvblen || (lvblen % 8)) | |
438 | return -EINVAL; | |
439 | ||
440 | if (!try_module_get(THIS_MODULE)) | |
441 | return -EINVAL; | |
442 | ||
dc68c7ed | 443 | if (!dlm_user_daemon_available()) { |
60f98d18 DT |
444 | log_print("dlm user daemon not available"); |
445 | error = -EUNATCH; | |
446 | goto out; | |
447 | } | |
448 | ||
449 | if (ops && ops_result) { | |
450 | if (!dlm_config.ci_recover_callbacks) | |
451 | *ops_result = -EOPNOTSUPP; | |
452 | else | |
453 | *ops_result = 0; | |
454 | } | |
455 | ||
3b0e761b ZL |
456 | if (!cluster) |
457 | log_print("dlm cluster name '%s' is being used without an application provided cluster name", | |
458 | dlm_config.ci_cluster_name); | |
459 | ||
60f98d18 DT |
460 | if (dlm_config.ci_recover_callbacks && cluster && |
461 | strncmp(cluster, dlm_config.ci_cluster_name, DLM_LOCKSPACE_LEN)) { | |
8e174374 GH |
462 | log_print("dlm cluster name '%s' does not match " |
463 | "the application cluster name '%s'", | |
60f98d18 DT |
464 | dlm_config.ci_cluster_name, cluster); |
465 | error = -EBADR; | |
466 | goto out; | |
dc68c7ed DT |
467 | } |
468 | ||
0f8e0d9a DT |
469 | error = 0; |
470 | ||
471 | spin_lock(&lslist_lock); | |
472 | list_for_each_entry(ls, &lslist, ls_list) { | |
473 | WARN_ON(ls->ls_create_count <= 0); | |
474 | if (ls->ls_namelen != namelen) | |
475 | continue; | |
476 | if (memcmp(ls->ls_name, name, namelen)) | |
477 | continue; | |
478 | if (flags & DLM_LSFL_NEWEXCL) { | |
479 | error = -EEXIST; | |
480 | break; | |
481 | } | |
482 | ls->ls_create_count++; | |
8511a272 DT |
483 | *lockspace = ls; |
484 | error = 1; | |
0f8e0d9a | 485 | break; |
e7fd4179 | 486 | } |
0f8e0d9a DT |
487 | spin_unlock(&lslist_lock); |
488 | ||
0f8e0d9a | 489 | if (error) |
8511a272 | 490 | goto out; |
0f8e0d9a DT |
491 | |
492 | error = -ENOMEM; | |
e7fd4179 | 493 | |
573c24c4 | 494 | ls = kzalloc(sizeof(struct dlm_ls) + namelen, GFP_NOFS); |
e7fd4179 DT |
495 | if (!ls) |
496 | goto out; | |
e7fd4179 DT |
497 | memcpy(ls->ls_name, name, namelen); |
498 | ls->ls_namelen = namelen; | |
e7fd4179 DT |
499 | ls->ls_lvblen = lvblen; |
500 | ls->ls_count = 0; | |
501 | ls->ls_flags = 0; | |
c1dcf65f | 502 | ls->ls_scan_time = jiffies; |
e7fd4179 | 503 | |
60f98d18 DT |
504 | if (ops && dlm_config.ci_recover_callbacks) { |
505 | ls->ls_ops = ops; | |
506 | ls->ls_ops_arg = ops_arg; | |
507 | } | |
508 | ||
3ae1acf9 DT |
509 | if (flags & DLM_LSFL_TIMEWARN) |
510 | set_bit(LSFL_TIMEWARN, &ls->ls_flags); | |
3ae1acf9 | 511 | |
fad59c13 | 512 | /* ls_exflags are forced to match among nodes, and we don't |
0f8e0d9a DT |
513 | need to require all nodes to have some flags set */ |
514 | ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS | | |
515 | DLM_LSFL_NEWEXCL)); | |
fad59c13 | 516 | |
68c817a1 | 517 | size = dlm_config.ci_rsbtbl_size; |
e7fd4179 DT |
518 | ls->ls_rsbtbl_size = size; |
519 | ||
42bc47b3 | 520 | ls->ls_rsbtbl = vmalloc(array_size(size, sizeof(struct dlm_rsbtable))); |
e7fd4179 DT |
521 | if (!ls->ls_rsbtbl) |
522 | goto out_lsfree; | |
523 | for (i = 0; i < size; i++) { | |
9beb3bf5 BP |
524 | ls->ls_rsbtbl[i].keep.rb_node = NULL; |
525 | ls->ls_rsbtbl[i].toss.rb_node = NULL; | |
c7be761a | 526 | spin_lock_init(&ls->ls_rsbtbl[i].lock); |
e7fd4179 DT |
527 | } |
528 | ||
05c32f47 DT |
529 | spin_lock_init(&ls->ls_remove_spin); |
530 | ||
531 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) { | |
532 | ls->ls_remove_names[i] = kzalloc(DLM_RESNAME_MAXLEN+1, | |
533 | GFP_KERNEL); | |
534 | if (!ls->ls_remove_names[i]) | |
535 | goto out_rsbtbl; | |
536 | } | |
537 | ||
3d6aa675 DT |
538 | idr_init(&ls->ls_lkbidr); |
539 | spin_lock_init(&ls->ls_lkbidr_spin); | |
e7fd4179 | 540 | |
e7fd4179 | 541 | INIT_LIST_HEAD(&ls->ls_waiters); |
90135925 | 542 | mutex_init(&ls->ls_waiters_mutex); |
ef0c2bb0 DT |
543 | INIT_LIST_HEAD(&ls->ls_orphans); |
544 | mutex_init(&ls->ls_orphans_mutex); | |
3ae1acf9 DT |
545 | INIT_LIST_HEAD(&ls->ls_timeout); |
546 | mutex_init(&ls->ls_timeout_mutex); | |
e7fd4179 | 547 | |
3881ac04 DT |
548 | INIT_LIST_HEAD(&ls->ls_new_rsb); |
549 | spin_lock_init(&ls->ls_new_rsb_spin); | |
550 | ||
e7fd4179 DT |
551 | INIT_LIST_HEAD(&ls->ls_nodes); |
552 | INIT_LIST_HEAD(&ls->ls_nodes_gone); | |
553 | ls->ls_num_nodes = 0; | |
554 | ls->ls_low_nodeid = 0; | |
555 | ls->ls_total_weight = 0; | |
556 | ls->ls_node_array = NULL; | |
557 | ||
558 | memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb)); | |
559 | ls->ls_stub_rsb.res_ls = ls; | |
560 | ||
5de6319b DT |
561 | ls->ls_debug_rsb_dentry = NULL; |
562 | ls->ls_debug_waiters_dentry = NULL; | |
e7fd4179 DT |
563 | |
564 | init_waitqueue_head(&ls->ls_uevent_wait); | |
565 | ls->ls_uevent_result = 0; | |
8b0e7b2c DT |
566 | init_completion(&ls->ls_members_done); |
567 | ls->ls_members_result = -1; | |
e7fd4179 | 568 | |
23e8e1aa DT |
569 | mutex_init(&ls->ls_cb_mutex); |
570 | INIT_LIST_HEAD(&ls->ls_cb_delay); | |
571 | ||
e7fd4179 | 572 | ls->ls_recoverd_task = NULL; |
90135925 | 573 | mutex_init(&ls->ls_recoverd_active); |
e7fd4179 | 574 | spin_lock_init(&ls->ls_recover_lock); |
98f176fb DT |
575 | spin_lock_init(&ls->ls_rcom_spin); |
576 | get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t)); | |
e7fd4179 DT |
577 | ls->ls_recover_status = 0; |
578 | ls->ls_recover_seq = 0; | |
579 | ls->ls_recover_args = NULL; | |
580 | init_rwsem(&ls->ls_in_recovery); | |
c36258b5 | 581 | init_rwsem(&ls->ls_recv_active); |
e7fd4179 | 582 | INIT_LIST_HEAD(&ls->ls_requestqueue); |
90135925 | 583 | mutex_init(&ls->ls_requestqueue_mutex); |
597d0cae | 584 | mutex_init(&ls->ls_clear_proc_locks); |
e7fd4179 | 585 | |
573c24c4 | 586 | ls->ls_recover_buf = kmalloc(dlm_config.ci_buffer_size, GFP_NOFS); |
e7fd4179 | 587 | if (!ls->ls_recover_buf) |
05c32f47 | 588 | goto out_lkbidr; |
e7fd4179 | 589 | |
757a4271 DT |
590 | ls->ls_slot = 0; |
591 | ls->ls_num_slots = 0; | |
592 | ls->ls_slots_size = 0; | |
593 | ls->ls_slots = NULL; | |
594 | ||
e7fd4179 DT |
595 | INIT_LIST_HEAD(&ls->ls_recover_list); |
596 | spin_lock_init(&ls->ls_recover_list_lock); | |
1d7c484e DT |
597 | idr_init(&ls->ls_recover_idr); |
598 | spin_lock_init(&ls->ls_recover_idr_lock); | |
e7fd4179 | 599 | ls->ls_recover_list_count = 0; |
597d0cae | 600 | ls->ls_local_handle = ls; |
e7fd4179 DT |
601 | init_waitqueue_head(&ls->ls_wait_general); |
602 | INIT_LIST_HEAD(&ls->ls_root_list); | |
603 | init_rwsem(&ls->ls_root_sem); | |
604 | ||
5f88f1ea | 605 | spin_lock(&lslist_lock); |
0f8e0d9a | 606 | ls->ls_create_count = 1; |
5f88f1ea DT |
607 | list_add(&ls->ls_list, &lslist); |
608 | spin_unlock(&lslist_lock); | |
609 | ||
23e8e1aa DT |
610 | if (flags & DLM_LSFL_FS) { |
611 | error = dlm_callback_start(ls); | |
612 | if (error) { | |
613 | log_error(ls, "can't start dlm_callback %d", error); | |
614 | goto out_delist; | |
615 | } | |
616 | } | |
617 | ||
475f230c DT |
618 | init_waitqueue_head(&ls->ls_recover_lock_wait); |
619 | ||
620 | /* | |
621 | * Once started, dlm_recoverd first looks for ls in lslist, then | |
622 | * initializes ls_in_recovery as locked in "down" mode. We need | |
623 | * to wait for the wakeup from dlm_recoverd because in_recovery | |
624 | * has to start out in down mode. | |
625 | */ | |
626 | ||
e7fd4179 DT |
627 | error = dlm_recoverd_start(ls); |
628 | if (error) { | |
629 | log_error(ls, "can't start dlm_recoverd %d", error); | |
23e8e1aa | 630 | goto out_callback; |
e7fd4179 DT |
631 | } |
632 | ||
475f230c DT |
633 | wait_event(ls->ls_recover_lock_wait, |
634 | test_bit(LSFL_RECOVER_LOCK, &ls->ls_flags)); | |
635 | ||
901195ed GKH |
636 | ls->ls_kobj.kset = dlm_kset; |
637 | error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL, | |
638 | "%s", ls->ls_name); | |
e7fd4179 | 639 | if (error) |
23e8e1aa | 640 | goto out_recoverd; |
901195ed | 641 | kobject_uevent(&ls->ls_kobj, KOBJ_ADD); |
79d72b54 DT |
642 | |
643 | /* let kobject handle freeing of ls if there's an error */ | |
644 | do_unreg = 1; | |
e7fd4179 | 645 | |
8b0e7b2c DT |
646 | /* This uevent triggers dlm_controld in userspace to add us to the |
647 | group of nodes that are members of this lockspace (managed by the | |
648 | cluster infrastructure.) Once it's done that, it tells us who the | |
649 | current lockspace members are (via configfs) and then tells the | |
650 | lockspace to start running (via sysfs) in dlm_ls_start(). */ | |
651 | ||
e7fd4179 DT |
652 | error = do_uevent(ls, 1); |
653 | if (error) | |
23e8e1aa | 654 | goto out_recoverd; |
79d72b54 | 655 | |
8b0e7b2c DT |
656 | wait_for_completion(&ls->ls_members_done); |
657 | error = ls->ls_members_result; | |
658 | if (error) | |
659 | goto out_members; | |
660 | ||
79d72b54 DT |
661 | dlm_create_debug_file(ls); |
662 | ||
075f0177 | 663 | log_rinfo(ls, "join complete"); |
e7fd4179 DT |
664 | *lockspace = ls; |
665 | return 0; | |
666 | ||
8b0e7b2c DT |
667 | out_members: |
668 | do_uevent(ls, 0); | |
669 | dlm_clear_members(ls); | |
670 | kfree(ls->ls_node_array); | |
23e8e1aa | 671 | out_recoverd: |
5f88f1ea | 672 | dlm_recoverd_stop(ls); |
23e8e1aa DT |
673 | out_callback: |
674 | dlm_callback_stop(ls); | |
79d72b54 | 675 | out_delist: |
e7fd4179 DT |
676 | spin_lock(&lslist_lock); |
677 | list_del(&ls->ls_list); | |
678 | spin_unlock(&lslist_lock); | |
1d7c484e | 679 | idr_destroy(&ls->ls_recover_idr); |
e7fd4179 | 680 | kfree(ls->ls_recover_buf); |
05c32f47 | 681 | out_lkbidr: |
3d6aa675 | 682 | idr_destroy(&ls->ls_lkbidr); |
b982896c | 683 | out_rsbtbl: |
3456880f TM |
684 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) |
685 | kfree(ls->ls_remove_names[i]); | |
c282af49 | 686 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 687 | out_lsfree: |
79d72b54 | 688 | if (do_unreg) |
197b12d6 | 689 | kobject_put(&ls->ls_kobj); |
79d72b54 DT |
690 | else |
691 | kfree(ls); | |
e7fd4179 DT |
692 | out: |
693 | module_put(THIS_MODULE); | |
694 | return error; | |
695 | } | |
696 | ||
60f98d18 DT |
697 | int dlm_new_lockspace(const char *name, const char *cluster, |
698 | uint32_t flags, int lvblen, | |
699 | const struct dlm_lockspace_ops *ops, void *ops_arg, | |
700 | int *ops_result, dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
701 | { |
702 | int error = 0; | |
703 | ||
90135925 | 704 | mutex_lock(&ls_lock); |
e7fd4179 DT |
705 | if (!ls_count) |
706 | error = threads_start(); | |
707 | if (error) | |
708 | goto out; | |
709 | ||
60f98d18 DT |
710 | error = new_lockspace(name, cluster, flags, lvblen, ops, ops_arg, |
711 | ops_result, lockspace); | |
e7fd4179 DT |
712 | if (!error) |
713 | ls_count++; | |
8511a272 DT |
714 | if (error > 0) |
715 | error = 0; | |
716 | if (!ls_count) | |
8b0e7b2c | 717 | threads_stop(); |
e7fd4179 | 718 | out: |
90135925 | 719 | mutex_unlock(&ls_lock); |
e7fd4179 DT |
720 | return error; |
721 | } | |
722 | ||
3d6aa675 | 723 | static int lkb_idr_is_local(int id, void *p, void *data) |
e7fd4179 | 724 | { |
3d6aa675 DT |
725 | struct dlm_lkb *lkb = p; |
726 | ||
a97f4a66 | 727 | return lkb->lkb_nodeid == 0 && lkb->lkb_grmode != DLM_LOCK_IV; |
3d6aa675 DT |
728 | } |
729 | ||
730 | static int lkb_idr_is_any(int id, void *p, void *data) | |
731 | { | |
732 | return 1; | |
733 | } | |
734 | ||
735 | static int lkb_idr_free(int id, void *p, void *data) | |
736 | { | |
737 | struct dlm_lkb *lkb = p; | |
738 | ||
3d6aa675 DT |
739 | if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY) |
740 | dlm_free_lvb(lkb->lkb_lvbptr); | |
741 | ||
742 | dlm_free_lkb(lkb); | |
743 | return 0; | |
744 | } | |
745 | ||
746 | /* NOTE: We check the lkbidr here rather than the resource table. | |
747 | This is because there may be LKBs queued as ASTs that have been unlinked | |
748 | from their RSBs and are pending deletion once the AST has been delivered */ | |
749 | ||
750 | static int lockspace_busy(struct dlm_ls *ls, int force) | |
751 | { | |
752 | int rv; | |
753 | ||
754 | spin_lock(&ls->ls_lkbidr_spin); | |
755 | if (force == 0) { | |
756 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls); | |
757 | } else if (force == 1) { | |
758 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_local, ls); | |
759 | } else { | |
760 | rv = 0; | |
e7fd4179 | 761 | } |
3d6aa675 DT |
762 | spin_unlock(&ls->ls_lkbidr_spin); |
763 | return rv; | |
e7fd4179 DT |
764 | } |
765 | ||
766 | static int release_lockspace(struct dlm_ls *ls, int force) | |
767 | { | |
e7fd4179 | 768 | struct dlm_rsb *rsb; |
9beb3bf5 | 769 | struct rb_node *n; |
0f8e0d9a DT |
770 | int i, busy, rv; |
771 | ||
3d6aa675 | 772 | busy = lockspace_busy(ls, force); |
0f8e0d9a DT |
773 | |
774 | spin_lock(&lslist_lock); | |
775 | if (ls->ls_create_count == 1) { | |
3d6aa675 | 776 | if (busy) { |
0f8e0d9a | 777 | rv = -EBUSY; |
3d6aa675 | 778 | } else { |
0f8e0d9a DT |
779 | /* remove_lockspace takes ls off lslist */ |
780 | ls->ls_create_count = 0; | |
781 | rv = 0; | |
782 | } | |
783 | } else if (ls->ls_create_count > 1) { | |
784 | rv = --ls->ls_create_count; | |
785 | } else { | |
786 | rv = -EINVAL; | |
787 | } | |
788 | spin_unlock(&lslist_lock); | |
789 | ||
790 | if (rv) { | |
791 | log_debug(ls, "release_lockspace no remove %d", rv); | |
792 | return rv; | |
793 | } | |
e7fd4179 | 794 | |
0f8e0d9a | 795 | dlm_device_deregister(ls); |
e7fd4179 | 796 | |
dc68c7ed | 797 | if (force < 3 && dlm_user_daemon_available()) |
e7fd4179 DT |
798 | do_uevent(ls, 0); |
799 | ||
800 | dlm_recoverd_stop(ls); | |
801 | ||
23e8e1aa DT |
802 | dlm_callback_stop(ls); |
803 | ||
e7fd4179 DT |
804 | remove_lockspace(ls); |
805 | ||
806 | dlm_delete_debug_file(ls); | |
807 | ||
8fc6ed9a | 808 | idr_destroy(&ls->ls_recover_idr); |
e7fd4179 DT |
809 | kfree(ls->ls_recover_buf); |
810 | ||
e7fd4179 | 811 | /* |
3d6aa675 | 812 | * Free all lkb's in idr |
e7fd4179 DT |
813 | */ |
814 | ||
3d6aa675 | 815 | idr_for_each(&ls->ls_lkbidr, lkb_idr_free, ls); |
3d6aa675 | 816 | idr_destroy(&ls->ls_lkbidr); |
e7fd4179 | 817 | |
e7fd4179 DT |
818 | /* |
819 | * Free all rsb's on rsbtbl[] lists | |
820 | */ | |
821 | ||
822 | for (i = 0; i < ls->ls_rsbtbl_size; i++) { | |
9beb3bf5 BP |
823 | while ((n = rb_first(&ls->ls_rsbtbl[i].keep))) { |
824 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
825 | rb_erase(n, &ls->ls_rsbtbl[i].keep); | |
52bda2b5 | 826 | dlm_free_rsb(rsb); |
e7fd4179 DT |
827 | } |
828 | ||
9beb3bf5 BP |
829 | while ((n = rb_first(&ls->ls_rsbtbl[i].toss))) { |
830 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
831 | rb_erase(n, &ls->ls_rsbtbl[i].toss); | |
52bda2b5 | 832 | dlm_free_rsb(rsb); |
e7fd4179 DT |
833 | } |
834 | } | |
835 | ||
c282af49 | 836 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 837 | |
05c32f47 DT |
838 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) |
839 | kfree(ls->ls_remove_names[i]); | |
840 | ||
3881ac04 DT |
841 | while (!list_empty(&ls->ls_new_rsb)) { |
842 | rsb = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb, | |
843 | res_hashchain); | |
844 | list_del(&rsb->res_hashchain); | |
845 | dlm_free_rsb(rsb); | |
846 | } | |
847 | ||
e7fd4179 DT |
848 | /* |
849 | * Free structures on any other lists | |
850 | */ | |
851 | ||
2896ee37 | 852 | dlm_purge_requestqueue(ls); |
e7fd4179 | 853 | kfree(ls->ls_recover_args); |
e7fd4179 DT |
854 | dlm_clear_members(ls); |
855 | dlm_clear_members_gone(ls); | |
856 | kfree(ls->ls_node_array); | |
075f0177 | 857 | log_rinfo(ls, "release_lockspace final free"); |
197b12d6 | 858 | kobject_put(&ls->ls_kobj); |
79d72b54 | 859 | /* The ls structure will be freed when the kobject is done with */ |
e7fd4179 | 860 | |
e7fd4179 DT |
861 | module_put(THIS_MODULE); |
862 | return 0; | |
863 | } | |
864 | ||
865 | /* | |
866 | * Called when a system has released all its locks and is not going to use the | |
867 | * lockspace any longer. We free everything we're managing for this lockspace. | |
868 | * Remaining nodes will go through the recovery process as if we'd died. The | |
869 | * lockspace must continue to function as usual, participating in recoveries, | |
870 | * until this returns. | |
871 | * | |
872 | * Force has 4 possible values: | |
873 | * 0 - don't destroy locksapce if it has any LKBs | |
874 | * 1 - destroy lockspace if it has remote LKBs but not if it has local LKBs | |
875 | * 2 - destroy lockspace regardless of LKBs | |
876 | * 3 - destroy lockspace as part of a forced shutdown | |
877 | */ | |
878 | ||
879 | int dlm_release_lockspace(void *lockspace, int force) | |
880 | { | |
881 | struct dlm_ls *ls; | |
0f8e0d9a | 882 | int error; |
e7fd4179 DT |
883 | |
884 | ls = dlm_find_lockspace_local(lockspace); | |
885 | if (!ls) | |
886 | return -EINVAL; | |
887 | dlm_put_lockspace(ls); | |
0f8e0d9a DT |
888 | |
889 | mutex_lock(&ls_lock); | |
890 | error = release_lockspace(ls, force); | |
891 | if (!error) | |
892 | ls_count--; | |
278afcbf | 893 | if (!ls_count) |
0f8e0d9a DT |
894 | threads_stop(); |
895 | mutex_unlock(&ls_lock); | |
896 | ||
897 | return error; | |
e7fd4179 DT |
898 | } |
899 | ||
dc68c7ed DT |
900 | void dlm_stop_lockspaces(void) |
901 | { | |
902 | struct dlm_ls *ls; | |
696b3d84 | 903 | int count; |
dc68c7ed DT |
904 | |
905 | restart: | |
696b3d84 | 906 | count = 0; |
dc68c7ed DT |
907 | spin_lock(&lslist_lock); |
908 | list_for_each_entry(ls, &lslist, ls_list) { | |
696b3d84 DT |
909 | if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) { |
910 | count++; | |
dc68c7ed | 911 | continue; |
696b3d84 | 912 | } |
dc68c7ed DT |
913 | spin_unlock(&lslist_lock); |
914 | log_error(ls, "no userland control daemon, stopping lockspace"); | |
915 | dlm_ls_stop(ls); | |
916 | goto restart; | |
917 | } | |
918 | spin_unlock(&lslist_lock); | |
696b3d84 DT |
919 | |
920 | if (count) | |
921 | log_print("dlm user daemon left %d lockspaces", count); | |
dc68c7ed DT |
922 | } |
923 |