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2522fe45 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e7fd4179 DT |
2 | /****************************************************************************** |
3 | ******************************************************************************* | |
4 | ** | |
5 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
60f98d18 | 6 | ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. |
e7fd4179 | 7 | ** |
e7fd4179 DT |
8 | ** |
9 | ******************************************************************************* | |
10 | ******************************************************************************/ | |
11 | ||
7963b8a5 PG |
12 | #include <linux/module.h> |
13 | ||
e7fd4179 DT |
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; | |
6edb5687 FF |
38 | int n; |
39 | int rc = kstrtoint(buf, 0, &n); | |
e7fd4179 | 40 | |
6edb5687 FF |
41 | if (rc) |
42 | return rc; | |
e2de7f56 PC |
43 | ls = dlm_find_lockspace_local(ls->ls_local_handle); |
44 | if (!ls) | |
45 | return -EINVAL; | |
46 | ||
e7fd4179 DT |
47 | switch (n) { |
48 | case 0: | |
49 | dlm_ls_stop(ls); | |
50 | break; | |
51 | case 1: | |
52 | dlm_ls_start(ls); | |
53 | break; | |
54 | default: | |
55 | ret = -EINVAL; | |
56 | } | |
e2de7f56 | 57 | dlm_put_lockspace(ls); |
e7fd4179 DT |
58 | return ret; |
59 | } | |
60 | ||
61 | static ssize_t dlm_event_store(struct dlm_ls *ls, const char *buf, size_t len) | |
62 | { | |
6edb5687 FF |
63 | int rc = kstrtoint(buf, 0, &ls->ls_uevent_result); |
64 | ||
65 | if (rc) | |
66 | return rc; | |
e7fd4179 DT |
67 | set_bit(LSFL_UEVENT_WAIT, &ls->ls_flags); |
68 | wake_up(&ls->ls_uevent_wait); | |
69 | return len; | |
70 | } | |
71 | ||
72 | static ssize_t dlm_id_show(struct dlm_ls *ls, char *buf) | |
73 | { | |
a1d144c7 | 74 | return snprintf(buf, PAGE_SIZE, "%u\n", ls->ls_global_id); |
e7fd4179 DT |
75 | } |
76 | ||
77 | static ssize_t dlm_id_store(struct dlm_ls *ls, const char *buf, size_t len) | |
78 | { | |
6edb5687 FF |
79 | int rc = kstrtouint(buf, 0, &ls->ls_global_id); |
80 | ||
81 | if (rc) | |
82 | return rc; | |
e7fd4179 DT |
83 | return len; |
84 | } | |
85 | ||
4875647a DT |
86 | static ssize_t dlm_nodir_show(struct dlm_ls *ls, char *buf) |
87 | { | |
88 | return snprintf(buf, PAGE_SIZE, "%u\n", dlm_no_directory(ls)); | |
89 | } | |
90 | ||
91 | static ssize_t dlm_nodir_store(struct dlm_ls *ls, const char *buf, size_t len) | |
92 | { | |
6edb5687 FF |
93 | int val; |
94 | int rc = kstrtoint(buf, 0, &val); | |
95 | ||
96 | if (rc) | |
97 | return rc; | |
4875647a DT |
98 | if (val == 1) |
99 | set_bit(LSFL_NODIR, &ls->ls_flags); | |
100 | return len; | |
101 | } | |
102 | ||
c56b39cd DT |
103 | static ssize_t dlm_recover_status_show(struct dlm_ls *ls, char *buf) |
104 | { | |
105 | uint32_t status = dlm_recover_status(ls); | |
a1d144c7 | 106 | return snprintf(buf, PAGE_SIZE, "%x\n", status); |
c56b39cd DT |
107 | } |
108 | ||
faa0f267 DT |
109 | static ssize_t dlm_recover_nodeid_show(struct dlm_ls *ls, char *buf) |
110 | { | |
a1d144c7 | 111 | return snprintf(buf, PAGE_SIZE, "%d\n", ls->ls_recover_nodeid); |
faa0f267 DT |
112 | } |
113 | ||
e7fd4179 DT |
114 | struct dlm_attr { |
115 | struct attribute attr; | |
116 | ssize_t (*show)(struct dlm_ls *, char *); | |
117 | ssize_t (*store)(struct dlm_ls *, const char *, size_t); | |
118 | }; | |
119 | ||
120 | static struct dlm_attr dlm_attr_control = { | |
121 | .attr = {.name = "control", .mode = S_IWUSR}, | |
122 | .store = dlm_control_store | |
123 | }; | |
124 | ||
125 | static struct dlm_attr dlm_attr_event = { | |
126 | .attr = {.name = "event_done", .mode = S_IWUSR}, | |
127 | .store = dlm_event_store | |
128 | }; | |
129 | ||
130 | static struct dlm_attr dlm_attr_id = { | |
131 | .attr = {.name = "id", .mode = S_IRUGO | S_IWUSR}, | |
132 | .show = dlm_id_show, | |
133 | .store = dlm_id_store | |
134 | }; | |
135 | ||
4875647a DT |
136 | static struct dlm_attr dlm_attr_nodir = { |
137 | .attr = {.name = "nodir", .mode = S_IRUGO | S_IWUSR}, | |
138 | .show = dlm_nodir_show, | |
139 | .store = dlm_nodir_store | |
140 | }; | |
141 | ||
c56b39cd DT |
142 | static struct dlm_attr dlm_attr_recover_status = { |
143 | .attr = {.name = "recover_status", .mode = S_IRUGO}, | |
144 | .show = dlm_recover_status_show | |
145 | }; | |
146 | ||
faa0f267 DT |
147 | static struct dlm_attr dlm_attr_recover_nodeid = { |
148 | .attr = {.name = "recover_nodeid", .mode = S_IRUGO}, | |
149 | .show = dlm_recover_nodeid_show | |
150 | }; | |
151 | ||
e7fd4179 DT |
152 | static struct attribute *dlm_attrs[] = { |
153 | &dlm_attr_control.attr, | |
154 | &dlm_attr_event.attr, | |
155 | &dlm_attr_id.attr, | |
4875647a | 156 | &dlm_attr_nodir.attr, |
c56b39cd | 157 | &dlm_attr_recover_status.attr, |
faa0f267 | 158 | &dlm_attr_recover_nodeid.attr, |
e7fd4179 DT |
159 | NULL, |
160 | }; | |
c9c5b5e1 | 161 | ATTRIBUTE_GROUPS(dlm); |
e7fd4179 DT |
162 | |
163 | static ssize_t dlm_attr_show(struct kobject *kobj, struct attribute *attr, | |
164 | char *buf) | |
165 | { | |
166 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
167 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
168 | return a->show ? a->show(ls, buf) : 0; | |
169 | } | |
170 | ||
171 | static ssize_t dlm_attr_store(struct kobject *kobj, struct attribute *attr, | |
172 | const char *buf, size_t len) | |
173 | { | |
174 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
175 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
176 | return a->store ? a->store(ls, buf, len) : len; | |
177 | } | |
178 | ||
ba542e3b PC |
179 | static void lockspace_kobj_release(struct kobject *k) |
180 | { | |
181 | struct dlm_ls *ls = container_of(k, struct dlm_ls, ls_kobj); | |
182 | kfree(ls); | |
183 | } | |
184 | ||
52cf25d0 | 185 | static const struct sysfs_ops dlm_attr_ops = { |
e7fd4179 DT |
186 | .show = dlm_attr_show, |
187 | .store = dlm_attr_store, | |
188 | }; | |
189 | ||
190 | static struct kobj_type dlm_ktype = { | |
c9c5b5e1 | 191 | .default_groups = dlm_groups, |
e7fd4179 | 192 | .sysfs_ops = &dlm_attr_ops, |
ba542e3b | 193 | .release = lockspace_kobj_release, |
e7fd4179 DT |
194 | }; |
195 | ||
d405936b | 196 | static struct kset *dlm_kset; |
e7fd4179 | 197 | |
e7fd4179 DT |
198 | static int do_uevent(struct dlm_ls *ls, int in) |
199 | { | |
200 | int error; | |
201 | ||
202 | if (in) | |
203 | kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE); | |
204 | else | |
205 | kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE); | |
206 | ||
075f0177 | 207 | log_rinfo(ls, "%s the lockspace group...", in ? "joining" : "leaving"); |
8b0e7b2c DT |
208 | |
209 | /* dlm_controld will see the uevent, do the necessary group management | |
210 | and then write to sysfs to wake us */ | |
211 | ||
e7fd4179 DT |
212 | error = wait_event_interruptible(ls->ls_uevent_wait, |
213 | test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags)); | |
8b0e7b2c | 214 | |
075f0177 | 215 | log_rinfo(ls, "group event done %d %d", error, ls->ls_uevent_result); |
8b0e7b2c | 216 | |
e7fd4179 DT |
217 | if (error) |
218 | goto out; | |
219 | ||
220 | error = ls->ls_uevent_result; | |
221 | out: | |
8b0e7b2c DT |
222 | if (error) |
223 | log_error(ls, "group %s failed %d %d", in ? "join" : "leave", | |
224 | error, ls->ls_uevent_result); | |
e7fd4179 DT |
225 | return error; |
226 | } | |
227 | ||
b4a5d4bc SW |
228 | static int dlm_uevent(struct kset *kset, struct kobject *kobj, |
229 | struct kobj_uevent_env *env) | |
230 | { | |
231 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
232 | ||
233 | add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name); | |
234 | return 0; | |
235 | } | |
236 | ||
417f7c59 | 237 | static const struct kset_uevent_ops dlm_uevent_ops = { |
b4a5d4bc SW |
238 | .uevent = dlm_uevent, |
239 | }; | |
e7fd4179 | 240 | |
30727174 | 241 | int __init dlm_lockspace_init(void) |
e7fd4179 | 242 | { |
e7fd4179 | 243 | ls_count = 0; |
90135925 | 244 | mutex_init(&ls_lock); |
e7fd4179 DT |
245 | INIT_LIST_HEAD(&lslist); |
246 | spin_lock_init(&lslist_lock); | |
247 | ||
b4a5d4bc | 248 | dlm_kset = kset_create_and_add("dlm", &dlm_uevent_ops, kernel_kobj); |
d405936b | 249 | if (!dlm_kset) { |
8e24eea7 | 250 | printk(KERN_WARNING "%s: can not create kset\n", __func__); |
d405936b GKH |
251 | return -ENOMEM; |
252 | } | |
253 | return 0; | |
e7fd4179 DT |
254 | } |
255 | ||
256 | void dlm_lockspace_exit(void) | |
257 | { | |
d405936b | 258 | kset_unregister(dlm_kset); |
e7fd4179 DT |
259 | } |
260 | ||
c1dcf65f DT |
261 | static struct dlm_ls *find_ls_to_scan(void) |
262 | { | |
263 | struct dlm_ls *ls; | |
264 | ||
265 | spin_lock(&lslist_lock); | |
266 | list_for_each_entry(ls, &lslist, ls_list) { | |
267 | if (time_after_eq(jiffies, ls->ls_scan_time + | |
268 | dlm_config.ci_scan_secs * HZ)) { | |
269 | spin_unlock(&lslist_lock); | |
270 | return ls; | |
271 | } | |
272 | } | |
273 | spin_unlock(&lslist_lock); | |
274 | return NULL; | |
275 | } | |
276 | ||
e7fd4179 DT |
277 | static int dlm_scand(void *data) |
278 | { | |
279 | struct dlm_ls *ls; | |
280 | ||
281 | while (!kthread_should_stop()) { | |
c1dcf65f DT |
282 | ls = find_ls_to_scan(); |
283 | if (ls) { | |
85e86edf | 284 | if (dlm_lock_recovery_try(ls)) { |
c1dcf65f | 285 | ls->ls_scan_time = jiffies; |
85e86edf | 286 | dlm_scan_rsbs(ls); |
3ae1acf9 | 287 | dlm_scan_timeout(ls); |
c6ff669b | 288 | dlm_scan_waiters(ls); |
85e86edf | 289 | dlm_unlock_recovery(ls); |
c1dcf65f DT |
290 | } else { |
291 | ls->ls_scan_time += HZ; | |
85e86edf | 292 | } |
c6ff669b | 293 | continue; |
85e86edf | 294 | } |
c6ff669b | 295 | schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ); |
e7fd4179 DT |
296 | } |
297 | return 0; | |
298 | } | |
299 | ||
300 | static int dlm_scand_start(void) | |
301 | { | |
302 | struct task_struct *p; | |
303 | int error = 0; | |
304 | ||
305 | p = kthread_run(dlm_scand, NULL, "dlm_scand"); | |
306 | if (IS_ERR(p)) | |
307 | error = PTR_ERR(p); | |
308 | else | |
309 | scand_task = p; | |
310 | return error; | |
311 | } | |
312 | ||
313 | static void dlm_scand_stop(void) | |
314 | { | |
315 | kthread_stop(scand_task); | |
316 | } | |
317 | ||
e7fd4179 DT |
318 | struct dlm_ls *dlm_find_lockspace_global(uint32_t id) |
319 | { | |
320 | struct dlm_ls *ls; | |
321 | ||
322 | spin_lock(&lslist_lock); | |
323 | ||
324 | list_for_each_entry(ls, &lslist, ls_list) { | |
325 | if (ls->ls_global_id == id) { | |
326 | ls->ls_count++; | |
327 | goto out; | |
328 | } | |
329 | } | |
330 | ls = NULL; | |
331 | out: | |
332 | spin_unlock(&lslist_lock); | |
333 | return ls; | |
334 | } | |
335 | ||
597d0cae | 336 | struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace) |
e7fd4179 | 337 | { |
597d0cae | 338 | struct dlm_ls *ls; |
e7fd4179 DT |
339 | |
340 | spin_lock(&lslist_lock); | |
597d0cae DT |
341 | list_for_each_entry(ls, &lslist, ls_list) { |
342 | if (ls->ls_local_handle == lockspace) { | |
343 | ls->ls_count++; | |
344 | goto out; | |
345 | } | |
346 | } | |
347 | ls = NULL; | |
348 | out: | |
349 | spin_unlock(&lslist_lock); | |
350 | return ls; | |
351 | } | |
352 | ||
353 | struct dlm_ls *dlm_find_lockspace_device(int minor) | |
354 | { | |
355 | struct dlm_ls *ls; | |
356 | ||
357 | spin_lock(&lslist_lock); | |
358 | list_for_each_entry(ls, &lslist, ls_list) { | |
359 | if (ls->ls_device.minor == minor) { | |
360 | ls->ls_count++; | |
361 | goto out; | |
362 | } | |
363 | } | |
364 | ls = NULL; | |
365 | out: | |
e7fd4179 DT |
366 | spin_unlock(&lslist_lock); |
367 | return ls; | |
368 | } | |
369 | ||
370 | void dlm_put_lockspace(struct dlm_ls *ls) | |
371 | { | |
372 | spin_lock(&lslist_lock); | |
373 | ls->ls_count--; | |
374 | spin_unlock(&lslist_lock); | |
375 | } | |
376 | ||
377 | static void remove_lockspace(struct dlm_ls *ls) | |
378 | { | |
379 | for (;;) { | |
380 | spin_lock(&lslist_lock); | |
381 | if (ls->ls_count == 0) { | |
0f8e0d9a | 382 | WARN_ON(ls->ls_create_count != 0); |
e7fd4179 DT |
383 | list_del(&ls->ls_list); |
384 | spin_unlock(&lslist_lock); | |
385 | return; | |
386 | } | |
387 | spin_unlock(&lslist_lock); | |
388 | ssleep(1); | |
389 | } | |
390 | } | |
391 | ||
392 | static int threads_start(void) | |
393 | { | |
394 | int error; | |
395 | ||
e7fd4179 DT |
396 | error = dlm_scand_start(); |
397 | if (error) { | |
398 | log_print("cannot start dlm_scand thread %d", error); | |
23e8e1aa | 399 | goto fail; |
e7fd4179 DT |
400 | } |
401 | ||
402 | /* Thread for sending/receiving messages for all lockspace's */ | |
403 | error = dlm_lowcomms_start(); | |
404 | if (error) { | |
405 | log_print("cannot start dlm lowcomms %d", error); | |
406 | goto scand_fail; | |
407 | } | |
408 | ||
409 | return 0; | |
410 | ||
411 | scand_fail: | |
412 | dlm_scand_stop(); | |
e7fd4179 DT |
413 | fail: |
414 | return error; | |
415 | } | |
416 | ||
417 | static void threads_stop(void) | |
418 | { | |
419 | dlm_scand_stop(); | |
420 | dlm_lowcomms_stop(); | |
e7fd4179 DT |
421 | } |
422 | ||
60f98d18 DT |
423 | static int new_lockspace(const char *name, const char *cluster, |
424 | uint32_t flags, int lvblen, | |
425 | const struct dlm_lockspace_ops *ops, void *ops_arg, | |
426 | int *ops_result, dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
427 | { |
428 | struct dlm_ls *ls; | |
0f8e0d9a | 429 | int i, size, error; |
79d72b54 | 430 | int do_unreg = 0; |
60f98d18 | 431 | int namelen = strlen(name); |
e7fd4179 | 432 | |
3f0806d2 | 433 | if (namelen > DLM_LOCKSPACE_LEN || namelen == 0) |
e7fd4179 DT |
434 | return -EINVAL; |
435 | ||
436 | if (!lvblen || (lvblen % 8)) | |
437 | return -EINVAL; | |
438 | ||
439 | if (!try_module_get(THIS_MODULE)) | |
440 | return -EINVAL; | |
441 | ||
dc68c7ed | 442 | if (!dlm_user_daemon_available()) { |
60f98d18 DT |
443 | log_print("dlm user daemon not available"); |
444 | error = -EUNATCH; | |
445 | goto out; | |
446 | } | |
447 | ||
448 | if (ops && ops_result) { | |
449 | if (!dlm_config.ci_recover_callbacks) | |
450 | *ops_result = -EOPNOTSUPP; | |
451 | else | |
452 | *ops_result = 0; | |
453 | } | |
454 | ||
3b0e761b ZL |
455 | if (!cluster) |
456 | log_print("dlm cluster name '%s' is being used without an application provided cluster name", | |
457 | dlm_config.ci_cluster_name); | |
458 | ||
60f98d18 DT |
459 | if (dlm_config.ci_recover_callbacks && cluster && |
460 | strncmp(cluster, dlm_config.ci_cluster_name, DLM_LOCKSPACE_LEN)) { | |
8e174374 GH |
461 | log_print("dlm cluster name '%s' does not match " |
462 | "the application cluster name '%s'", | |
60f98d18 DT |
463 | dlm_config.ci_cluster_name, cluster); |
464 | error = -EBADR; | |
465 | goto out; | |
dc68c7ed DT |
466 | } |
467 | ||
0f8e0d9a DT |
468 | error = 0; |
469 | ||
470 | spin_lock(&lslist_lock); | |
471 | list_for_each_entry(ls, &lslist, ls_list) { | |
472 | WARN_ON(ls->ls_create_count <= 0); | |
473 | if (ls->ls_namelen != namelen) | |
474 | continue; | |
475 | if (memcmp(ls->ls_name, name, namelen)) | |
476 | continue; | |
477 | if (flags & DLM_LSFL_NEWEXCL) { | |
478 | error = -EEXIST; | |
479 | break; | |
480 | } | |
481 | ls->ls_create_count++; | |
8511a272 DT |
482 | *lockspace = ls; |
483 | error = 1; | |
0f8e0d9a | 484 | break; |
e7fd4179 | 485 | } |
0f8e0d9a DT |
486 | spin_unlock(&lslist_lock); |
487 | ||
0f8e0d9a | 488 | if (error) |
8511a272 | 489 | goto out; |
0f8e0d9a DT |
490 | |
491 | error = -ENOMEM; | |
e7fd4179 | 492 | |
573c24c4 | 493 | ls = kzalloc(sizeof(struct dlm_ls) + namelen, GFP_NOFS); |
e7fd4179 DT |
494 | if (!ls) |
495 | goto out; | |
e7fd4179 DT |
496 | memcpy(ls->ls_name, name, namelen); |
497 | ls->ls_namelen = namelen; | |
e7fd4179 DT |
498 | ls->ls_lvblen = lvblen; |
499 | ls->ls_count = 0; | |
500 | ls->ls_flags = 0; | |
c1dcf65f | 501 | ls->ls_scan_time = jiffies; |
e7fd4179 | 502 | |
60f98d18 DT |
503 | if (ops && dlm_config.ci_recover_callbacks) { |
504 | ls->ls_ops = ops; | |
505 | ls->ls_ops_arg = ops_arg; | |
506 | } | |
507 | ||
3ae1acf9 DT |
508 | if (flags & DLM_LSFL_TIMEWARN) |
509 | set_bit(LSFL_TIMEWARN, &ls->ls_flags); | |
3ae1acf9 | 510 | |
fad59c13 | 511 | /* ls_exflags are forced to match among nodes, and we don't |
0f8e0d9a DT |
512 | need to require all nodes to have some flags set */ |
513 | ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS | | |
514 | DLM_LSFL_NEWEXCL)); | |
fad59c13 | 515 | |
68c817a1 | 516 | size = dlm_config.ci_rsbtbl_size; |
e7fd4179 DT |
517 | ls->ls_rsbtbl_size = size; |
518 | ||
42bc47b3 | 519 | ls->ls_rsbtbl = vmalloc(array_size(size, sizeof(struct dlm_rsbtable))); |
e7fd4179 DT |
520 | if (!ls->ls_rsbtbl) |
521 | goto out_lsfree; | |
522 | for (i = 0; i < size; i++) { | |
9beb3bf5 BP |
523 | ls->ls_rsbtbl[i].keep.rb_node = NULL; |
524 | ls->ls_rsbtbl[i].toss.rb_node = NULL; | |
c7be761a | 525 | spin_lock_init(&ls->ls_rsbtbl[i].lock); |
e7fd4179 DT |
526 | } |
527 | ||
05c32f47 DT |
528 | spin_lock_init(&ls->ls_remove_spin); |
529 | ||
530 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) { | |
531 | ls->ls_remove_names[i] = kzalloc(DLM_RESNAME_MAXLEN+1, | |
532 | GFP_KERNEL); | |
533 | if (!ls->ls_remove_names[i]) | |
534 | goto out_rsbtbl; | |
535 | } | |
536 | ||
3d6aa675 DT |
537 | idr_init(&ls->ls_lkbidr); |
538 | spin_lock_init(&ls->ls_lkbidr_spin); | |
e7fd4179 | 539 | |
e7fd4179 | 540 | INIT_LIST_HEAD(&ls->ls_waiters); |
90135925 | 541 | mutex_init(&ls->ls_waiters_mutex); |
ef0c2bb0 DT |
542 | INIT_LIST_HEAD(&ls->ls_orphans); |
543 | mutex_init(&ls->ls_orphans_mutex); | |
3ae1acf9 DT |
544 | INIT_LIST_HEAD(&ls->ls_timeout); |
545 | mutex_init(&ls->ls_timeout_mutex); | |
e7fd4179 | 546 | |
3881ac04 DT |
547 | INIT_LIST_HEAD(&ls->ls_new_rsb); |
548 | spin_lock_init(&ls->ls_new_rsb_spin); | |
549 | ||
e7fd4179 DT |
550 | INIT_LIST_HEAD(&ls->ls_nodes); |
551 | INIT_LIST_HEAD(&ls->ls_nodes_gone); | |
552 | ls->ls_num_nodes = 0; | |
553 | ls->ls_low_nodeid = 0; | |
554 | ls->ls_total_weight = 0; | |
555 | ls->ls_node_array = NULL; | |
556 | ||
557 | memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb)); | |
558 | ls->ls_stub_rsb.res_ls = ls; | |
559 | ||
5de6319b DT |
560 | ls->ls_debug_rsb_dentry = NULL; |
561 | ls->ls_debug_waiters_dentry = NULL; | |
e7fd4179 DT |
562 | |
563 | init_waitqueue_head(&ls->ls_uevent_wait); | |
564 | ls->ls_uevent_result = 0; | |
8b0e7b2c DT |
565 | init_completion(&ls->ls_members_done); |
566 | ls->ls_members_result = -1; | |
e7fd4179 | 567 | |
23e8e1aa DT |
568 | mutex_init(&ls->ls_cb_mutex); |
569 | INIT_LIST_HEAD(&ls->ls_cb_delay); | |
570 | ||
e7fd4179 | 571 | ls->ls_recoverd_task = NULL; |
90135925 | 572 | mutex_init(&ls->ls_recoverd_active); |
e7fd4179 | 573 | spin_lock_init(&ls->ls_recover_lock); |
98f176fb DT |
574 | spin_lock_init(&ls->ls_rcom_spin); |
575 | get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t)); | |
e7fd4179 DT |
576 | ls->ls_recover_status = 0; |
577 | ls->ls_recover_seq = 0; | |
578 | ls->ls_recover_args = NULL; | |
579 | init_rwsem(&ls->ls_in_recovery); | |
c36258b5 | 580 | init_rwsem(&ls->ls_recv_active); |
e7fd4179 | 581 | INIT_LIST_HEAD(&ls->ls_requestqueue); |
90135925 | 582 | mutex_init(&ls->ls_requestqueue_mutex); |
597d0cae | 583 | mutex_init(&ls->ls_clear_proc_locks); |
e7fd4179 | 584 | |
573c24c4 | 585 | ls->ls_recover_buf = kmalloc(dlm_config.ci_buffer_size, GFP_NOFS); |
e7fd4179 | 586 | if (!ls->ls_recover_buf) |
05c32f47 | 587 | goto out_lkbidr; |
e7fd4179 | 588 | |
757a4271 DT |
589 | ls->ls_slot = 0; |
590 | ls->ls_num_slots = 0; | |
591 | ls->ls_slots_size = 0; | |
592 | ls->ls_slots = NULL; | |
593 | ||
e7fd4179 DT |
594 | INIT_LIST_HEAD(&ls->ls_recover_list); |
595 | spin_lock_init(&ls->ls_recover_list_lock); | |
1d7c484e DT |
596 | idr_init(&ls->ls_recover_idr); |
597 | spin_lock_init(&ls->ls_recover_idr_lock); | |
e7fd4179 | 598 | ls->ls_recover_list_count = 0; |
597d0cae | 599 | ls->ls_local_handle = ls; |
e7fd4179 DT |
600 | init_waitqueue_head(&ls->ls_wait_general); |
601 | INIT_LIST_HEAD(&ls->ls_root_list); | |
602 | init_rwsem(&ls->ls_root_sem); | |
603 | ||
5f88f1ea | 604 | spin_lock(&lslist_lock); |
0f8e0d9a | 605 | ls->ls_create_count = 1; |
5f88f1ea DT |
606 | list_add(&ls->ls_list, &lslist); |
607 | spin_unlock(&lslist_lock); | |
608 | ||
23e8e1aa DT |
609 | if (flags & DLM_LSFL_FS) { |
610 | error = dlm_callback_start(ls); | |
611 | if (error) { | |
612 | log_error(ls, "can't start dlm_callback %d", error); | |
613 | goto out_delist; | |
614 | } | |
615 | } | |
616 | ||
475f230c DT |
617 | init_waitqueue_head(&ls->ls_recover_lock_wait); |
618 | ||
619 | /* | |
620 | * Once started, dlm_recoverd first looks for ls in lslist, then | |
621 | * initializes ls_in_recovery as locked in "down" mode. We need | |
622 | * to wait for the wakeup from dlm_recoverd because in_recovery | |
623 | * has to start out in down mode. | |
624 | */ | |
625 | ||
e7fd4179 DT |
626 | error = dlm_recoverd_start(ls); |
627 | if (error) { | |
628 | log_error(ls, "can't start dlm_recoverd %d", error); | |
23e8e1aa | 629 | goto out_callback; |
e7fd4179 DT |
630 | } |
631 | ||
475f230c DT |
632 | wait_event(ls->ls_recover_lock_wait, |
633 | test_bit(LSFL_RECOVER_LOCK, &ls->ls_flags)); | |
634 | ||
901195ed GKH |
635 | ls->ls_kobj.kset = dlm_kset; |
636 | error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL, | |
637 | "%s", ls->ls_name); | |
e7fd4179 | 638 | if (error) |
23e8e1aa | 639 | goto out_recoverd; |
901195ed | 640 | kobject_uevent(&ls->ls_kobj, KOBJ_ADD); |
79d72b54 DT |
641 | |
642 | /* let kobject handle freeing of ls if there's an error */ | |
643 | do_unreg = 1; | |
e7fd4179 | 644 | |
8b0e7b2c DT |
645 | /* This uevent triggers dlm_controld in userspace to add us to the |
646 | group of nodes that are members of this lockspace (managed by the | |
647 | cluster infrastructure.) Once it's done that, it tells us who the | |
648 | current lockspace members are (via configfs) and then tells the | |
649 | lockspace to start running (via sysfs) in dlm_ls_start(). */ | |
650 | ||
e7fd4179 DT |
651 | error = do_uevent(ls, 1); |
652 | if (error) | |
23e8e1aa | 653 | goto out_recoverd; |
79d72b54 | 654 | |
8b0e7b2c DT |
655 | wait_for_completion(&ls->ls_members_done); |
656 | error = ls->ls_members_result; | |
657 | if (error) | |
658 | goto out_members; | |
659 | ||
79d72b54 DT |
660 | dlm_create_debug_file(ls); |
661 | ||
075f0177 | 662 | log_rinfo(ls, "join complete"); |
e7fd4179 DT |
663 | *lockspace = ls; |
664 | return 0; | |
665 | ||
8b0e7b2c DT |
666 | out_members: |
667 | do_uevent(ls, 0); | |
668 | dlm_clear_members(ls); | |
669 | kfree(ls->ls_node_array); | |
23e8e1aa | 670 | out_recoverd: |
5f88f1ea | 671 | dlm_recoverd_stop(ls); |
23e8e1aa DT |
672 | out_callback: |
673 | dlm_callback_stop(ls); | |
79d72b54 | 674 | out_delist: |
e7fd4179 DT |
675 | spin_lock(&lslist_lock); |
676 | list_del(&ls->ls_list); | |
677 | spin_unlock(&lslist_lock); | |
1d7c484e | 678 | idr_destroy(&ls->ls_recover_idr); |
e7fd4179 | 679 | kfree(ls->ls_recover_buf); |
05c32f47 | 680 | out_lkbidr: |
3d6aa675 | 681 | idr_destroy(&ls->ls_lkbidr); |
b982896c | 682 | out_rsbtbl: |
3456880f TM |
683 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) |
684 | kfree(ls->ls_remove_names[i]); | |
c282af49 | 685 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 686 | out_lsfree: |
79d72b54 | 687 | if (do_unreg) |
197b12d6 | 688 | kobject_put(&ls->ls_kobj); |
79d72b54 DT |
689 | else |
690 | kfree(ls); | |
e7fd4179 DT |
691 | out: |
692 | module_put(THIS_MODULE); | |
693 | return error; | |
694 | } | |
695 | ||
60f98d18 DT |
696 | int dlm_new_lockspace(const char *name, const char *cluster, |
697 | uint32_t flags, int lvblen, | |
698 | const struct dlm_lockspace_ops *ops, void *ops_arg, | |
699 | int *ops_result, dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
700 | { |
701 | int error = 0; | |
702 | ||
90135925 | 703 | mutex_lock(&ls_lock); |
e7fd4179 DT |
704 | if (!ls_count) |
705 | error = threads_start(); | |
706 | if (error) | |
707 | goto out; | |
708 | ||
60f98d18 DT |
709 | error = new_lockspace(name, cluster, flags, lvblen, ops, ops_arg, |
710 | ops_result, lockspace); | |
e7fd4179 DT |
711 | if (!error) |
712 | ls_count++; | |
8511a272 DT |
713 | if (error > 0) |
714 | error = 0; | |
715 | if (!ls_count) | |
8b0e7b2c | 716 | threads_stop(); |
e7fd4179 | 717 | out: |
90135925 | 718 | mutex_unlock(&ls_lock); |
e7fd4179 DT |
719 | return error; |
720 | } | |
721 | ||
3d6aa675 | 722 | static int lkb_idr_is_local(int id, void *p, void *data) |
e7fd4179 | 723 | { |
3d6aa675 DT |
724 | struct dlm_lkb *lkb = p; |
725 | ||
a97f4a66 | 726 | return lkb->lkb_nodeid == 0 && lkb->lkb_grmode != DLM_LOCK_IV; |
3d6aa675 DT |
727 | } |
728 | ||
729 | static int lkb_idr_is_any(int id, void *p, void *data) | |
730 | { | |
731 | return 1; | |
732 | } | |
733 | ||
734 | static int lkb_idr_free(int id, void *p, void *data) | |
735 | { | |
736 | struct dlm_lkb *lkb = p; | |
737 | ||
3d6aa675 DT |
738 | if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY) |
739 | dlm_free_lvb(lkb->lkb_lvbptr); | |
740 | ||
741 | dlm_free_lkb(lkb); | |
742 | return 0; | |
743 | } | |
744 | ||
745 | /* NOTE: We check the lkbidr here rather than the resource table. | |
746 | This is because there may be LKBs queued as ASTs that have been unlinked | |
747 | from their RSBs and are pending deletion once the AST has been delivered */ | |
748 | ||
749 | static int lockspace_busy(struct dlm_ls *ls, int force) | |
750 | { | |
751 | int rv; | |
752 | ||
753 | spin_lock(&ls->ls_lkbidr_spin); | |
754 | if (force == 0) { | |
755 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls); | |
756 | } else if (force == 1) { | |
757 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_local, ls); | |
758 | } else { | |
759 | rv = 0; | |
e7fd4179 | 760 | } |
3d6aa675 DT |
761 | spin_unlock(&ls->ls_lkbidr_spin); |
762 | return rv; | |
e7fd4179 DT |
763 | } |
764 | ||
765 | static int release_lockspace(struct dlm_ls *ls, int force) | |
766 | { | |
e7fd4179 | 767 | struct dlm_rsb *rsb; |
9beb3bf5 | 768 | struct rb_node *n; |
0f8e0d9a DT |
769 | int i, busy, rv; |
770 | ||
3d6aa675 | 771 | busy = lockspace_busy(ls, force); |
0f8e0d9a DT |
772 | |
773 | spin_lock(&lslist_lock); | |
774 | if (ls->ls_create_count == 1) { | |
3d6aa675 | 775 | if (busy) { |
0f8e0d9a | 776 | rv = -EBUSY; |
3d6aa675 | 777 | } else { |
0f8e0d9a DT |
778 | /* remove_lockspace takes ls off lslist */ |
779 | ls->ls_create_count = 0; | |
780 | rv = 0; | |
781 | } | |
782 | } else if (ls->ls_create_count > 1) { | |
783 | rv = --ls->ls_create_count; | |
784 | } else { | |
785 | rv = -EINVAL; | |
786 | } | |
787 | spin_unlock(&lslist_lock); | |
788 | ||
789 | if (rv) { | |
790 | log_debug(ls, "release_lockspace no remove %d", rv); | |
791 | return rv; | |
792 | } | |
e7fd4179 | 793 | |
0f8e0d9a | 794 | dlm_device_deregister(ls); |
e7fd4179 | 795 | |
dc68c7ed | 796 | if (force < 3 && dlm_user_daemon_available()) |
e7fd4179 DT |
797 | do_uevent(ls, 0); |
798 | ||
799 | dlm_recoverd_stop(ls); | |
800 | ||
23e8e1aa DT |
801 | dlm_callback_stop(ls); |
802 | ||
e7fd4179 DT |
803 | remove_lockspace(ls); |
804 | ||
805 | dlm_delete_debug_file(ls); | |
806 | ||
8fc6ed9a | 807 | idr_destroy(&ls->ls_recover_idr); |
e7fd4179 DT |
808 | kfree(ls->ls_recover_buf); |
809 | ||
e7fd4179 | 810 | /* |
3d6aa675 | 811 | * Free all lkb's in idr |
e7fd4179 DT |
812 | */ |
813 | ||
3d6aa675 | 814 | idr_for_each(&ls->ls_lkbidr, lkb_idr_free, ls); |
3d6aa675 | 815 | idr_destroy(&ls->ls_lkbidr); |
e7fd4179 | 816 | |
e7fd4179 DT |
817 | /* |
818 | * Free all rsb's on rsbtbl[] lists | |
819 | */ | |
820 | ||
821 | for (i = 0; i < ls->ls_rsbtbl_size; i++) { | |
9beb3bf5 BP |
822 | while ((n = rb_first(&ls->ls_rsbtbl[i].keep))) { |
823 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
824 | rb_erase(n, &ls->ls_rsbtbl[i].keep); | |
52bda2b5 | 825 | dlm_free_rsb(rsb); |
e7fd4179 DT |
826 | } |
827 | ||
9beb3bf5 BP |
828 | while ((n = rb_first(&ls->ls_rsbtbl[i].toss))) { |
829 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
830 | rb_erase(n, &ls->ls_rsbtbl[i].toss); | |
52bda2b5 | 831 | dlm_free_rsb(rsb); |
e7fd4179 DT |
832 | } |
833 | } | |
834 | ||
c282af49 | 835 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 836 | |
05c32f47 DT |
837 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) |
838 | kfree(ls->ls_remove_names[i]); | |
839 | ||
3881ac04 DT |
840 | while (!list_empty(&ls->ls_new_rsb)) { |
841 | rsb = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb, | |
842 | res_hashchain); | |
843 | list_del(&rsb->res_hashchain); | |
844 | dlm_free_rsb(rsb); | |
845 | } | |
846 | ||
e7fd4179 DT |
847 | /* |
848 | * Free structures on any other lists | |
849 | */ | |
850 | ||
2896ee37 | 851 | dlm_purge_requestqueue(ls); |
e7fd4179 | 852 | kfree(ls->ls_recover_args); |
e7fd4179 DT |
853 | dlm_clear_members(ls); |
854 | dlm_clear_members_gone(ls); | |
855 | kfree(ls->ls_node_array); | |
075f0177 | 856 | log_rinfo(ls, "release_lockspace final free"); |
197b12d6 | 857 | kobject_put(&ls->ls_kobj); |
79d72b54 | 858 | /* The ls structure will be freed when the kobject is done with */ |
e7fd4179 | 859 | |
e7fd4179 DT |
860 | module_put(THIS_MODULE); |
861 | return 0; | |
862 | } | |
863 | ||
864 | /* | |
865 | * Called when a system has released all its locks and is not going to use the | |
866 | * lockspace any longer. We free everything we're managing for this lockspace. | |
867 | * Remaining nodes will go through the recovery process as if we'd died. The | |
868 | * lockspace must continue to function as usual, participating in recoveries, | |
869 | * until this returns. | |
870 | * | |
871 | * Force has 4 possible values: | |
872 | * 0 - don't destroy locksapce if it has any LKBs | |
873 | * 1 - destroy lockspace if it has remote LKBs but not if it has local LKBs | |
874 | * 2 - destroy lockspace regardless of LKBs | |
875 | * 3 - destroy lockspace as part of a forced shutdown | |
876 | */ | |
877 | ||
878 | int dlm_release_lockspace(void *lockspace, int force) | |
879 | { | |
880 | struct dlm_ls *ls; | |
0f8e0d9a | 881 | int error; |
e7fd4179 DT |
882 | |
883 | ls = dlm_find_lockspace_local(lockspace); | |
884 | if (!ls) | |
885 | return -EINVAL; | |
886 | dlm_put_lockspace(ls); | |
0f8e0d9a DT |
887 | |
888 | mutex_lock(&ls_lock); | |
889 | error = release_lockspace(ls, force); | |
890 | if (!error) | |
891 | ls_count--; | |
278afcbf | 892 | if (!ls_count) |
0f8e0d9a DT |
893 | threads_stop(); |
894 | mutex_unlock(&ls_lock); | |
895 | ||
896 | return error; | |
e7fd4179 DT |
897 | } |
898 | ||
dc68c7ed DT |
899 | void dlm_stop_lockspaces(void) |
900 | { | |
901 | struct dlm_ls *ls; | |
696b3d84 | 902 | int count; |
dc68c7ed DT |
903 | |
904 | restart: | |
696b3d84 | 905 | count = 0; |
dc68c7ed DT |
906 | spin_lock(&lslist_lock); |
907 | list_for_each_entry(ls, &lslist, ls_list) { | |
696b3d84 DT |
908 | if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) { |
909 | count++; | |
dc68c7ed | 910 | continue; |
696b3d84 | 911 | } |
dc68c7ed DT |
912 | spin_unlock(&lslist_lock); |
913 | log_error(ls, "no userland control daemon, stopping lockspace"); | |
914 | dlm_ls_stop(ls); | |
915 | goto restart; | |
916 | } | |
917 | spin_unlock(&lslist_lock); | |
696b3d84 DT |
918 | |
919 | if (count) | |
920 | log_print("dlm user daemon left %d lockspaces", count); | |
dc68c7ed DT |
921 | } |
922 |