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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 | 18 | #include "dir.h" |
a070a91c | 19 | #include "midcomms.h" |
e7fd4179 DT |
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 | { | |
e7fd4179 DT |
200 | if (in) |
201 | kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE); | |
202 | else | |
203 | kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE); | |
204 | ||
075f0177 | 205 | log_rinfo(ls, "%s the lockspace group...", in ? "joining" : "leaving"); |
8b0e7b2c DT |
206 | |
207 | /* dlm_controld will see the uevent, do the necessary group management | |
208 | and then write to sysfs to wake us */ | |
209 | ||
f084a4f4 RL |
210 | wait_event(ls->ls_uevent_wait, |
211 | test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags)); | |
8b0e7b2c | 212 | |
f084a4f4 | 213 | log_rinfo(ls, "group event done %d", ls->ls_uevent_result); |
e7fd4179 | 214 | |
f084a4f4 | 215 | return ls->ls_uevent_result; |
e7fd4179 DT |
216 | } |
217 | ||
56d5f362 | 218 | static int dlm_uevent(const struct kobject *kobj, struct kobj_uevent_env *env) |
b4a5d4bc | 219 | { |
56d5f362 | 220 | const struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); |
b4a5d4bc SW |
221 | |
222 | add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name); | |
223 | return 0; | |
224 | } | |
225 | ||
417f7c59 | 226 | static const struct kset_uevent_ops dlm_uevent_ops = { |
b4a5d4bc SW |
227 | .uevent = dlm_uevent, |
228 | }; | |
e7fd4179 | 229 | |
30727174 | 230 | int __init dlm_lockspace_init(void) |
e7fd4179 | 231 | { |
e7fd4179 | 232 | ls_count = 0; |
90135925 | 233 | mutex_init(&ls_lock); |
e7fd4179 DT |
234 | INIT_LIST_HEAD(&lslist); |
235 | spin_lock_init(&lslist_lock); | |
236 | ||
b4a5d4bc | 237 | dlm_kset = kset_create_and_add("dlm", &dlm_uevent_ops, kernel_kobj); |
d405936b | 238 | if (!dlm_kset) { |
8e24eea7 | 239 | printk(KERN_WARNING "%s: can not create kset\n", __func__); |
d405936b GKH |
240 | return -ENOMEM; |
241 | } | |
242 | return 0; | |
e7fd4179 DT |
243 | } |
244 | ||
245 | void dlm_lockspace_exit(void) | |
246 | { | |
d405936b | 247 | kset_unregister(dlm_kset); |
e7fd4179 DT |
248 | } |
249 | ||
c1dcf65f DT |
250 | static struct dlm_ls *find_ls_to_scan(void) |
251 | { | |
252 | struct dlm_ls *ls; | |
253 | ||
254 | spin_lock(&lslist_lock); | |
255 | list_for_each_entry(ls, &lslist, ls_list) { | |
256 | if (time_after_eq(jiffies, ls->ls_scan_time + | |
257 | dlm_config.ci_scan_secs * HZ)) { | |
258 | spin_unlock(&lslist_lock); | |
259 | return ls; | |
260 | } | |
261 | } | |
262 | spin_unlock(&lslist_lock); | |
263 | return NULL; | |
264 | } | |
265 | ||
e7fd4179 DT |
266 | static int dlm_scand(void *data) |
267 | { | |
268 | struct dlm_ls *ls; | |
269 | ||
270 | while (!kthread_should_stop()) { | |
c1dcf65f DT |
271 | ls = find_ls_to_scan(); |
272 | if (ls) { | |
85e86edf | 273 | if (dlm_lock_recovery_try(ls)) { |
c1dcf65f | 274 | ls->ls_scan_time = jiffies; |
85e86edf DT |
275 | dlm_scan_rsbs(ls); |
276 | dlm_unlock_recovery(ls); | |
c1dcf65f DT |
277 | } else { |
278 | ls->ls_scan_time += HZ; | |
85e86edf | 279 | } |
c6ff669b | 280 | continue; |
85e86edf | 281 | } |
c6ff669b | 282 | schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ); |
e7fd4179 DT |
283 | } |
284 | return 0; | |
285 | } | |
286 | ||
287 | static int dlm_scand_start(void) | |
288 | { | |
289 | struct task_struct *p; | |
290 | int error = 0; | |
291 | ||
292 | p = kthread_run(dlm_scand, NULL, "dlm_scand"); | |
293 | if (IS_ERR(p)) | |
294 | error = PTR_ERR(p); | |
295 | else | |
296 | scand_task = p; | |
297 | return error; | |
298 | } | |
299 | ||
300 | static void dlm_scand_stop(void) | |
301 | { | |
302 | kthread_stop(scand_task); | |
303 | } | |
304 | ||
e7fd4179 DT |
305 | struct dlm_ls *dlm_find_lockspace_global(uint32_t id) |
306 | { | |
307 | struct dlm_ls *ls; | |
308 | ||
309 | spin_lock(&lslist_lock); | |
310 | ||
311 | list_for_each_entry(ls, &lslist, ls_list) { | |
312 | if (ls->ls_global_id == id) { | |
3cb5977c | 313 | atomic_inc(&ls->ls_count); |
e7fd4179 DT |
314 | goto out; |
315 | } | |
316 | } | |
317 | ls = NULL; | |
318 | out: | |
319 | spin_unlock(&lslist_lock); | |
320 | return ls; | |
321 | } | |
322 | ||
597d0cae | 323 | struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace) |
e7fd4179 | 324 | { |
597d0cae | 325 | struct dlm_ls *ls; |
e7fd4179 DT |
326 | |
327 | spin_lock(&lslist_lock); | |
597d0cae DT |
328 | list_for_each_entry(ls, &lslist, ls_list) { |
329 | if (ls->ls_local_handle == lockspace) { | |
3cb5977c | 330 | atomic_inc(&ls->ls_count); |
597d0cae DT |
331 | goto out; |
332 | } | |
333 | } | |
334 | ls = NULL; | |
335 | out: | |
336 | spin_unlock(&lslist_lock); | |
337 | return ls; | |
338 | } | |
339 | ||
340 | struct dlm_ls *dlm_find_lockspace_device(int minor) | |
341 | { | |
342 | struct dlm_ls *ls; | |
343 | ||
344 | spin_lock(&lslist_lock); | |
345 | list_for_each_entry(ls, &lslist, ls_list) { | |
346 | if (ls->ls_device.minor == minor) { | |
3cb5977c | 347 | atomic_inc(&ls->ls_count); |
597d0cae DT |
348 | goto out; |
349 | } | |
350 | } | |
351 | ls = NULL; | |
352 | out: | |
e7fd4179 DT |
353 | spin_unlock(&lslist_lock); |
354 | return ls; | |
355 | } | |
356 | ||
357 | void dlm_put_lockspace(struct dlm_ls *ls) | |
358 | { | |
3cb5977c AA |
359 | if (atomic_dec_and_test(&ls->ls_count)) |
360 | wake_up(&ls->ls_count_wait); | |
e7fd4179 DT |
361 | } |
362 | ||
363 | static void remove_lockspace(struct dlm_ls *ls) | |
364 | { | |
3cb5977c AA |
365 | retry: |
366 | wait_event(ls->ls_count_wait, atomic_read(&ls->ls_count) == 0); | |
367 | ||
368 | spin_lock(&lslist_lock); | |
369 | if (atomic_read(&ls->ls_count) != 0) { | |
e7fd4179 | 370 | spin_unlock(&lslist_lock); |
3cb5977c | 371 | goto retry; |
e7fd4179 | 372 | } |
3cb5977c AA |
373 | |
374 | WARN_ON(ls->ls_create_count != 0); | |
375 | list_del(&ls->ls_list); | |
376 | spin_unlock(&lslist_lock); | |
e7fd4179 DT |
377 | } |
378 | ||
379 | static int threads_start(void) | |
380 | { | |
381 | int error; | |
382 | ||
aad633dc AA |
383 | /* Thread for sending/receiving messages for all lockspace's */ |
384 | error = dlm_midcomms_start(); | |
e7fd4179 | 385 | if (error) { |
aad633dc | 386 | log_print("cannot start dlm midcomms %d", error); |
23e8e1aa | 387 | goto fail; |
e7fd4179 DT |
388 | } |
389 | ||
aad633dc | 390 | error = dlm_scand_start(); |
e7fd4179 | 391 | if (error) { |
aad633dc AA |
392 | log_print("cannot start dlm_scand thread %d", error); |
393 | goto midcomms_fail; | |
e7fd4179 DT |
394 | } |
395 | ||
396 | return 0; | |
397 | ||
aad633dc AA |
398 | midcomms_fail: |
399 | dlm_midcomms_stop(); | |
e7fd4179 DT |
400 | fail: |
401 | return error; | |
402 | } | |
403 | ||
60f98d18 DT |
404 | static int new_lockspace(const char *name, const char *cluster, |
405 | uint32_t flags, int lvblen, | |
406 | const struct dlm_lockspace_ops *ops, void *ops_arg, | |
407 | int *ops_result, dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
408 | { |
409 | struct dlm_ls *ls; | |
0f8e0d9a | 410 | int i, size, error; |
79d72b54 | 411 | int do_unreg = 0; |
60f98d18 | 412 | int namelen = strlen(name); |
e7fd4179 | 413 | |
3f0806d2 | 414 | if (namelen > DLM_LOCKSPACE_LEN || namelen == 0) |
e7fd4179 DT |
415 | return -EINVAL; |
416 | ||
b5c9d37c | 417 | if (lvblen % 8) |
e7fd4179 DT |
418 | return -EINVAL; |
419 | ||
420 | if (!try_module_get(THIS_MODULE)) | |
421 | return -EINVAL; | |
422 | ||
dc68c7ed | 423 | if (!dlm_user_daemon_available()) { |
60f98d18 DT |
424 | log_print("dlm user daemon not available"); |
425 | error = -EUNATCH; | |
426 | goto out; | |
427 | } | |
428 | ||
429 | if (ops && ops_result) { | |
430 | if (!dlm_config.ci_recover_callbacks) | |
431 | *ops_result = -EOPNOTSUPP; | |
432 | else | |
433 | *ops_result = 0; | |
434 | } | |
435 | ||
3b0e761b ZL |
436 | if (!cluster) |
437 | log_print("dlm cluster name '%s' is being used without an application provided cluster name", | |
438 | dlm_config.ci_cluster_name); | |
439 | ||
60f98d18 DT |
440 | if (dlm_config.ci_recover_callbacks && cluster && |
441 | strncmp(cluster, dlm_config.ci_cluster_name, DLM_LOCKSPACE_LEN)) { | |
8e174374 GH |
442 | log_print("dlm cluster name '%s' does not match " |
443 | "the application cluster name '%s'", | |
60f98d18 DT |
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 | |
d96d0f96 | 474 | ls = kzalloc(sizeof(*ls), 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 | 479 | ls->ls_lvblen = lvblen; |
3cb5977c AA |
480 | atomic_set(&ls->ls_count, 0); |
481 | init_waitqueue_head(&ls->ls_count_wait); | |
e7fd4179 | 482 | ls->ls_flags = 0; |
c1dcf65f | 483 | ls->ls_scan_time = jiffies; |
e7fd4179 | 484 | |
60f98d18 DT |
485 | if (ops && dlm_config.ci_recover_callbacks) { |
486 | ls->ls_ops = ops; | |
487 | ls->ls_ops_arg = ops_arg; | |
488 | } | |
489 | ||
6b0afc0c AA |
490 | /* ls_exflags are forced to match among nodes, and we don't |
491 | * need to require all nodes to have some flags set | |
492 | */ | |
493 | ls->ls_exflags = (flags & ~(DLM_LSFL_FS | DLM_LSFL_NEWEXCL)); | |
fad59c13 | 494 | |
d921a23f | 495 | size = READ_ONCE(dlm_config.ci_rsbtbl_size); |
e7fd4179 DT |
496 | ls->ls_rsbtbl_size = size; |
497 | ||
42bc47b3 | 498 | ls->ls_rsbtbl = vmalloc(array_size(size, sizeof(struct dlm_rsbtable))); |
e7fd4179 DT |
499 | if (!ls->ls_rsbtbl) |
500 | goto out_lsfree; | |
501 | for (i = 0; i < size; i++) { | |
9beb3bf5 BP |
502 | ls->ls_rsbtbl[i].keep.rb_node = NULL; |
503 | ls->ls_rsbtbl[i].toss.rb_node = NULL; | |
c7be761a | 504 | spin_lock_init(&ls->ls_rsbtbl[i].lock); |
e7fd4179 DT |
505 | } |
506 | ||
05c32f47 DT |
507 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) { |
508 | ls->ls_remove_names[i] = kzalloc(DLM_RESNAME_MAXLEN+1, | |
509 | GFP_KERNEL); | |
510 | if (!ls->ls_remove_names[i]) | |
511 | goto out_rsbtbl; | |
512 | } | |
513 | ||
3d6aa675 DT |
514 | idr_init(&ls->ls_lkbidr); |
515 | spin_lock_init(&ls->ls_lkbidr_spin); | |
e7fd4179 | 516 | |
e7fd4179 | 517 | INIT_LIST_HEAD(&ls->ls_waiters); |
90135925 | 518 | mutex_init(&ls->ls_waiters_mutex); |
ef0c2bb0 DT |
519 | INIT_LIST_HEAD(&ls->ls_orphans); |
520 | mutex_init(&ls->ls_orphans_mutex); | |
e7fd4179 | 521 | |
3881ac04 DT |
522 | INIT_LIST_HEAD(&ls->ls_new_rsb); |
523 | spin_lock_init(&ls->ls_new_rsb_spin); | |
524 | ||
e7fd4179 DT |
525 | INIT_LIST_HEAD(&ls->ls_nodes); |
526 | INIT_LIST_HEAD(&ls->ls_nodes_gone); | |
527 | ls->ls_num_nodes = 0; | |
528 | ls->ls_low_nodeid = 0; | |
529 | ls->ls_total_weight = 0; | |
530 | ls->ls_node_array = NULL; | |
531 | ||
a7e7ffac AA |
532 | memset(&ls->ls_local_rsb, 0, sizeof(struct dlm_rsb)); |
533 | ls->ls_local_rsb.res_ls = ls; | |
e7fd4179 | 534 | |
5de6319b DT |
535 | ls->ls_debug_rsb_dentry = NULL; |
536 | ls->ls_debug_waiters_dentry = NULL; | |
e7fd4179 DT |
537 | |
538 | init_waitqueue_head(&ls->ls_uevent_wait); | |
539 | ls->ls_uevent_result = 0; | |
682bb91b AA |
540 | init_completion(&ls->ls_recovery_done); |
541 | ls->ls_recovery_result = -1; | |
e7fd4179 | 542 | |
a4c0352b | 543 | spin_lock_init(&ls->ls_cb_lock); |
23e8e1aa DT |
544 | INIT_LIST_HEAD(&ls->ls_cb_delay); |
545 | ||
e7fd4179 | 546 | ls->ls_recoverd_task = NULL; |
90135925 | 547 | mutex_init(&ls->ls_recoverd_active); |
e7fd4179 | 548 | spin_lock_init(&ls->ls_recover_lock); |
98f176fb DT |
549 | spin_lock_init(&ls->ls_rcom_spin); |
550 | get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t)); | |
e7fd4179 | 551 | ls->ls_recover_status = 0; |
317dd6ba | 552 | ls->ls_recover_seq = get_random_u64(); |
e7fd4179 DT |
553 | ls->ls_recover_args = NULL; |
554 | init_rwsem(&ls->ls_in_recovery); | |
c36258b5 | 555 | init_rwsem(&ls->ls_recv_active); |
e7fd4179 | 556 | INIT_LIST_HEAD(&ls->ls_requestqueue); |
164d88ab AA |
557 | atomic_set(&ls->ls_requestqueue_cnt, 0); |
558 | init_waitqueue_head(&ls->ls_requestqueue_wait); | |
90135925 | 559 | mutex_init(&ls->ls_requestqueue_mutex); |
296d9d1e | 560 | spin_lock_init(&ls->ls_clear_proc_locks); |
e7fd4179 | 561 | |
489d8e55 AA |
562 | /* Due backwards compatibility with 3.1 we need to use maximum |
563 | * possible dlm message size to be sure the message will fit and | |
564 | * not having out of bounds issues. However on sending side 3.2 | |
565 | * might send less. | |
566 | */ | |
d10a0b88 | 567 | ls->ls_recover_buf = kmalloc(DLM_MAX_SOCKET_BUFSIZE, GFP_NOFS); |
e7fd4179 | 568 | if (!ls->ls_recover_buf) |
05c32f47 | 569 | goto out_lkbidr; |
e7fd4179 | 570 | |
757a4271 DT |
571 | ls->ls_slot = 0; |
572 | ls->ls_num_slots = 0; | |
573 | ls->ls_slots_size = 0; | |
574 | ls->ls_slots = NULL; | |
575 | ||
e7fd4179 DT |
576 | INIT_LIST_HEAD(&ls->ls_recover_list); |
577 | spin_lock_init(&ls->ls_recover_list_lock); | |
1d7c484e DT |
578 | idr_init(&ls->ls_recover_idr); |
579 | spin_lock_init(&ls->ls_recover_idr_lock); | |
e7fd4179 | 580 | ls->ls_recover_list_count = 0; |
597d0cae | 581 | ls->ls_local_handle = ls; |
e7fd4179 DT |
582 | init_waitqueue_head(&ls->ls_wait_general); |
583 | INIT_LIST_HEAD(&ls->ls_root_list); | |
584 | init_rwsem(&ls->ls_root_sem); | |
585 | ||
5f88f1ea | 586 | spin_lock(&lslist_lock); |
0f8e0d9a | 587 | ls->ls_create_count = 1; |
5f88f1ea DT |
588 | list_add(&ls->ls_list, &lslist); |
589 | spin_unlock(&lslist_lock); | |
590 | ||
23e8e1aa DT |
591 | if (flags & DLM_LSFL_FS) { |
592 | error = dlm_callback_start(ls); | |
593 | if (error) { | |
594 | log_error(ls, "can't start dlm_callback %d", error); | |
595 | goto out_delist; | |
596 | } | |
597 | } | |
598 | ||
475f230c DT |
599 | init_waitqueue_head(&ls->ls_recover_lock_wait); |
600 | ||
601 | /* | |
602 | * Once started, dlm_recoverd first looks for ls in lslist, then | |
603 | * initializes ls_in_recovery as locked in "down" mode. We need | |
604 | * to wait for the wakeup from dlm_recoverd because in_recovery | |
605 | * has to start out in down mode. | |
606 | */ | |
607 | ||
e7fd4179 DT |
608 | error = dlm_recoverd_start(ls); |
609 | if (error) { | |
610 | log_error(ls, "can't start dlm_recoverd %d", error); | |
23e8e1aa | 611 | goto out_callback; |
e7fd4179 DT |
612 | } |
613 | ||
475f230c DT |
614 | wait_event(ls->ls_recover_lock_wait, |
615 | test_bit(LSFL_RECOVER_LOCK, &ls->ls_flags)); | |
616 | ||
0ffddafc WH |
617 | /* let kobject handle freeing of ls if there's an error */ |
618 | do_unreg = 1; | |
619 | ||
901195ed GKH |
620 | ls->ls_kobj.kset = dlm_kset; |
621 | error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL, | |
622 | "%s", ls->ls_name); | |
e7fd4179 | 623 | if (error) |
23e8e1aa | 624 | goto out_recoverd; |
901195ed | 625 | kobject_uevent(&ls->ls_kobj, KOBJ_ADD); |
79d72b54 | 626 | |
8b0e7b2c DT |
627 | /* This uevent triggers dlm_controld in userspace to add us to the |
628 | group of nodes that are members of this lockspace (managed by the | |
629 | cluster infrastructure.) Once it's done that, it tells us who the | |
630 | current lockspace members are (via configfs) and then tells the | |
631 | lockspace to start running (via sysfs) in dlm_ls_start(). */ | |
632 | ||
e7fd4179 DT |
633 | error = do_uevent(ls, 1); |
634 | if (error) | |
23e8e1aa | 635 | goto out_recoverd; |
79d72b54 | 636 | |
682bb91b AA |
637 | /* wait until recovery is successful or failed */ |
638 | wait_for_completion(&ls->ls_recovery_done); | |
639 | error = ls->ls_recovery_result; | |
8b0e7b2c DT |
640 | if (error) |
641 | goto out_members; | |
642 | ||
79d72b54 DT |
643 | dlm_create_debug_file(ls); |
644 | ||
075f0177 | 645 | log_rinfo(ls, "join complete"); |
e7fd4179 DT |
646 | *lockspace = ls; |
647 | return 0; | |
648 | ||
8b0e7b2c DT |
649 | out_members: |
650 | do_uevent(ls, 0); | |
651 | dlm_clear_members(ls); | |
652 | kfree(ls->ls_node_array); | |
23e8e1aa | 653 | out_recoverd: |
5f88f1ea | 654 | dlm_recoverd_stop(ls); |
23e8e1aa DT |
655 | out_callback: |
656 | dlm_callback_stop(ls); | |
79d72b54 | 657 | out_delist: |
e7fd4179 DT |
658 | spin_lock(&lslist_lock); |
659 | list_del(&ls->ls_list); | |
660 | spin_unlock(&lslist_lock); | |
1d7c484e | 661 | idr_destroy(&ls->ls_recover_idr); |
e7fd4179 | 662 | kfree(ls->ls_recover_buf); |
05c32f47 | 663 | out_lkbidr: |
3d6aa675 | 664 | idr_destroy(&ls->ls_lkbidr); |
b982896c | 665 | out_rsbtbl: |
3456880f TM |
666 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) |
667 | kfree(ls->ls_remove_names[i]); | |
c282af49 | 668 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 669 | out_lsfree: |
79d72b54 | 670 | if (do_unreg) |
197b12d6 | 671 | kobject_put(&ls->ls_kobj); |
79d72b54 DT |
672 | else |
673 | kfree(ls); | |
e7fd4179 DT |
674 | out: |
675 | module_put(THIS_MODULE); | |
676 | return error; | |
677 | } | |
678 | ||
12cda13c AA |
679 | static int __dlm_new_lockspace(const char *name, const char *cluster, |
680 | uint32_t flags, int lvblen, | |
681 | const struct dlm_lockspace_ops *ops, | |
682 | void *ops_arg, int *ops_result, | |
683 | dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
684 | { |
685 | int error = 0; | |
686 | ||
90135925 | 687 | mutex_lock(&ls_lock); |
e7fd4179 DT |
688 | if (!ls_count) |
689 | error = threads_start(); | |
690 | if (error) | |
691 | goto out; | |
692 | ||
60f98d18 DT |
693 | error = new_lockspace(name, cluster, flags, lvblen, ops, ops_arg, |
694 | ops_result, lockspace); | |
e7fd4179 DT |
695 | if (!error) |
696 | ls_count++; | |
8511a272 DT |
697 | if (error > 0) |
698 | error = 0; | |
9d232469 AA |
699 | if (!ls_count) { |
700 | dlm_scand_stop(); | |
a070a91c | 701 | dlm_midcomms_shutdown(); |
8b0188b0 | 702 | dlm_midcomms_stop(); |
9d232469 | 703 | } |
e7fd4179 | 704 | out: |
90135925 | 705 | mutex_unlock(&ls_lock); |
e7fd4179 DT |
706 | return error; |
707 | } | |
708 | ||
12cda13c AA |
709 | int dlm_new_lockspace(const char *name, const char *cluster, uint32_t flags, |
710 | int lvblen, const struct dlm_lockspace_ops *ops, | |
711 | void *ops_arg, int *ops_result, | |
712 | dlm_lockspace_t **lockspace) | |
713 | { | |
714 | return __dlm_new_lockspace(name, cluster, flags | DLM_LSFL_FS, lvblen, | |
715 | ops, ops_arg, ops_result, lockspace); | |
716 | } | |
717 | ||
718 | int dlm_new_user_lockspace(const char *name, const char *cluster, | |
719 | uint32_t flags, int lvblen, | |
720 | const struct dlm_lockspace_ops *ops, | |
721 | void *ops_arg, int *ops_result, | |
722 | dlm_lockspace_t **lockspace) | |
723 | { | |
724 | return __dlm_new_lockspace(name, cluster, flags, lvblen, ops, | |
725 | ops_arg, ops_result, lockspace); | |
726 | } | |
727 | ||
3d6aa675 | 728 | static int lkb_idr_is_local(int id, void *p, void *data) |
e7fd4179 | 729 | { |
3d6aa675 DT |
730 | struct dlm_lkb *lkb = p; |
731 | ||
a97f4a66 | 732 | return lkb->lkb_nodeid == 0 && lkb->lkb_grmode != DLM_LOCK_IV; |
3d6aa675 DT |
733 | } |
734 | ||
735 | static int lkb_idr_is_any(int id, void *p, void *data) | |
736 | { | |
737 | return 1; | |
738 | } | |
739 | ||
740 | static int lkb_idr_free(int id, void *p, void *data) | |
741 | { | |
742 | struct dlm_lkb *lkb = p; | |
743 | ||
e1af8728 | 744 | if (lkb->lkb_lvbptr && test_bit(DLM_IFL_MSTCPY_BIT, &lkb->lkb_iflags)) |
3d6aa675 DT |
745 | dlm_free_lvb(lkb->lkb_lvbptr); |
746 | ||
747 | dlm_free_lkb(lkb); | |
748 | return 0; | |
749 | } | |
750 | ||
751 | /* NOTE: We check the lkbidr here rather than the resource table. | |
752 | This is because there may be LKBs queued as ASTs that have been unlinked | |
753 | from their RSBs and are pending deletion once the AST has been delivered */ | |
754 | ||
755 | static int lockspace_busy(struct dlm_ls *ls, int force) | |
756 | { | |
757 | int rv; | |
758 | ||
759 | spin_lock(&ls->ls_lkbidr_spin); | |
760 | if (force == 0) { | |
761 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls); | |
762 | } else if (force == 1) { | |
763 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_local, ls); | |
764 | } else { | |
765 | rv = 0; | |
e7fd4179 | 766 | } |
3d6aa675 DT |
767 | spin_unlock(&ls->ls_lkbidr_spin); |
768 | return rv; | |
e7fd4179 DT |
769 | } |
770 | ||
771 | static int release_lockspace(struct dlm_ls *ls, int force) | |
772 | { | |
e7fd4179 | 773 | struct dlm_rsb *rsb; |
9beb3bf5 | 774 | struct rb_node *n; |
0f8e0d9a DT |
775 | int i, busy, rv; |
776 | ||
3d6aa675 | 777 | busy = lockspace_busy(ls, force); |
0f8e0d9a DT |
778 | |
779 | spin_lock(&lslist_lock); | |
780 | if (ls->ls_create_count == 1) { | |
3d6aa675 | 781 | if (busy) { |
0f8e0d9a | 782 | rv = -EBUSY; |
3d6aa675 | 783 | } else { |
0f8e0d9a DT |
784 | /* remove_lockspace takes ls off lslist */ |
785 | ls->ls_create_count = 0; | |
786 | rv = 0; | |
787 | } | |
788 | } else if (ls->ls_create_count > 1) { | |
789 | rv = --ls->ls_create_count; | |
790 | } else { | |
791 | rv = -EINVAL; | |
792 | } | |
793 | spin_unlock(&lslist_lock); | |
794 | ||
795 | if (rv) { | |
796 | log_debug(ls, "release_lockspace no remove %d", rv); | |
797 | return rv; | |
798 | } | |
e7fd4179 | 799 | |
b8b750e0 AA |
800 | if (ls_count == 1) |
801 | dlm_midcomms_version_wait(); | |
802 | ||
0f8e0d9a | 803 | dlm_device_deregister(ls); |
e7fd4179 | 804 | |
dc68c7ed | 805 | if (force < 3 && dlm_user_daemon_available()) |
e7fd4179 DT |
806 | do_uevent(ls, 0); |
807 | ||
808 | dlm_recoverd_stop(ls); | |
809 | ||
9d232469 AA |
810 | if (ls_count == 1) { |
811 | dlm_scand_stop(); | |
ecd95673 | 812 | dlm_clear_members(ls); |
a070a91c | 813 | dlm_midcomms_shutdown(); |
9d232469 AA |
814 | } |
815 | ||
23e8e1aa DT |
816 | dlm_callback_stop(ls); |
817 | ||
e7fd4179 DT |
818 | remove_lockspace(ls); |
819 | ||
820 | dlm_delete_debug_file(ls); | |
821 | ||
8fc6ed9a | 822 | idr_destroy(&ls->ls_recover_idr); |
e7fd4179 DT |
823 | kfree(ls->ls_recover_buf); |
824 | ||
e7fd4179 | 825 | /* |
3d6aa675 | 826 | * Free all lkb's in idr |
e7fd4179 DT |
827 | */ |
828 | ||
3d6aa675 | 829 | idr_for_each(&ls->ls_lkbidr, lkb_idr_free, ls); |
3d6aa675 | 830 | idr_destroy(&ls->ls_lkbidr); |
e7fd4179 | 831 | |
e7fd4179 DT |
832 | /* |
833 | * Free all rsb's on rsbtbl[] lists | |
834 | */ | |
835 | ||
836 | for (i = 0; i < ls->ls_rsbtbl_size; i++) { | |
9beb3bf5 BP |
837 | while ((n = rb_first(&ls->ls_rsbtbl[i].keep))) { |
838 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
839 | rb_erase(n, &ls->ls_rsbtbl[i].keep); | |
52bda2b5 | 840 | dlm_free_rsb(rsb); |
e7fd4179 DT |
841 | } |
842 | ||
9beb3bf5 BP |
843 | while ((n = rb_first(&ls->ls_rsbtbl[i].toss))) { |
844 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
845 | rb_erase(n, &ls->ls_rsbtbl[i].toss); | |
52bda2b5 | 846 | dlm_free_rsb(rsb); |
e7fd4179 DT |
847 | } |
848 | } | |
849 | ||
c282af49 | 850 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 851 | |
05c32f47 DT |
852 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) |
853 | kfree(ls->ls_remove_names[i]); | |
854 | ||
3881ac04 DT |
855 | while (!list_empty(&ls->ls_new_rsb)) { |
856 | rsb = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb, | |
857 | res_hashchain); | |
858 | list_del(&rsb->res_hashchain); | |
859 | dlm_free_rsb(rsb); | |
860 | } | |
861 | ||
e7fd4179 DT |
862 | /* |
863 | * Free structures on any other lists | |
864 | */ | |
865 | ||
2896ee37 | 866 | dlm_purge_requestqueue(ls); |
e7fd4179 | 867 | kfree(ls->ls_recover_args); |
e7fd4179 DT |
868 | dlm_clear_members(ls); |
869 | dlm_clear_members_gone(ls); | |
870 | kfree(ls->ls_node_array); | |
075f0177 | 871 | log_rinfo(ls, "release_lockspace final free"); |
197b12d6 | 872 | kobject_put(&ls->ls_kobj); |
79d72b54 | 873 | /* The ls structure will be freed when the kobject is done with */ |
e7fd4179 | 874 | |
e7fd4179 DT |
875 | module_put(THIS_MODULE); |
876 | return 0; | |
877 | } | |
878 | ||
879 | /* | |
880 | * Called when a system has released all its locks and is not going to use the | |
881 | * lockspace any longer. We free everything we're managing for this lockspace. | |
882 | * Remaining nodes will go through the recovery process as if we'd died. The | |
883 | * lockspace must continue to function as usual, participating in recoveries, | |
884 | * until this returns. | |
885 | * | |
886 | * Force has 4 possible values: | |
bb6866a5 | 887 | * 0 - don't destroy lockspace if it has any LKBs |
e7fd4179 DT |
888 | * 1 - destroy lockspace if it has remote LKBs but not if it has local LKBs |
889 | * 2 - destroy lockspace regardless of LKBs | |
890 | * 3 - destroy lockspace as part of a forced shutdown | |
891 | */ | |
892 | ||
893 | int dlm_release_lockspace(void *lockspace, int force) | |
894 | { | |
895 | struct dlm_ls *ls; | |
0f8e0d9a | 896 | int error; |
e7fd4179 DT |
897 | |
898 | ls = dlm_find_lockspace_local(lockspace); | |
899 | if (!ls) | |
900 | return -EINVAL; | |
901 | dlm_put_lockspace(ls); | |
0f8e0d9a DT |
902 | |
903 | mutex_lock(&ls_lock); | |
904 | error = release_lockspace(ls, force); | |
905 | if (!error) | |
906 | ls_count--; | |
278afcbf | 907 | if (!ls_count) |
8b0188b0 | 908 | dlm_midcomms_stop(); |
0f8e0d9a DT |
909 | mutex_unlock(&ls_lock); |
910 | ||
911 | return error; | |
e7fd4179 DT |
912 | } |
913 | ||
dc68c7ed DT |
914 | void dlm_stop_lockspaces(void) |
915 | { | |
916 | struct dlm_ls *ls; | |
696b3d84 | 917 | int count; |
dc68c7ed DT |
918 | |
919 | restart: | |
696b3d84 | 920 | count = 0; |
dc68c7ed DT |
921 | spin_lock(&lslist_lock); |
922 | list_for_each_entry(ls, &lslist, ls_list) { | |
696b3d84 DT |
923 | if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) { |
924 | count++; | |
dc68c7ed | 925 | continue; |
696b3d84 | 926 | } |
dc68c7ed DT |
927 | spin_unlock(&lslist_lock); |
928 | log_error(ls, "no userland control daemon, stopping lockspace"); | |
929 | dlm_ls_stop(ls); | |
930 | goto restart; | |
931 | } | |
932 | spin_unlock(&lslist_lock); | |
696b3d84 DT |
933 | |
934 | if (count) | |
935 | log_print("dlm user daemon left %d lockspaces", count); | |
dc68c7ed DT |
936 | } |
937 | ||
2c3fa6ae AA |
938 | void dlm_stop_lockspaces_check(void) |
939 | { | |
940 | struct dlm_ls *ls; | |
941 | ||
942 | spin_lock(&lslist_lock); | |
943 | list_for_each_entry(ls, &lslist, ls_list) { | |
944 | if (WARN_ON(!rwsem_is_locked(&ls->ls_in_recovery) || | |
945 | !dlm_locking_stopped(ls))) | |
946 | break; | |
947 | } | |
948 | spin_unlock(&lslist_lock); | |
949 | } |