Commit | Line | Data |
---|---|---|
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 "lowcomms.h" |
21 | #include "config.h" | |
22 | #include "memory.h" | |
23 | #include "lock.h" | |
c56b39cd | 24 | #include "recover.h" |
2896ee37 | 25 | #include "requestqueue.h" |
0f8e0d9a | 26 | #include "user.h" |
23e8e1aa | 27 | #include "ast.h" |
e7fd4179 | 28 | |
e7fd4179 | 29 | static int ls_count; |
90135925 | 30 | static struct mutex ls_lock; |
e7fd4179 DT |
31 | static struct list_head lslist; |
32 | static spinlock_t lslist_lock; | |
33 | static struct task_struct * scand_task; | |
34 | ||
35 | ||
36 | static ssize_t dlm_control_store(struct dlm_ls *ls, const char *buf, size_t len) | |
37 | { | |
38 | ssize_t ret = len; | |
6edb5687 FF |
39 | int n; |
40 | int rc = kstrtoint(buf, 0, &n); | |
e7fd4179 | 41 | |
6edb5687 FF |
42 | if (rc) |
43 | return rc; | |
e2de7f56 PC |
44 | ls = dlm_find_lockspace_local(ls->ls_local_handle); |
45 | if (!ls) | |
46 | return -EINVAL; | |
47 | ||
e7fd4179 DT |
48 | switch (n) { |
49 | case 0: | |
50 | dlm_ls_stop(ls); | |
51 | break; | |
52 | case 1: | |
53 | dlm_ls_start(ls); | |
54 | break; | |
55 | default: | |
56 | ret = -EINVAL; | |
57 | } | |
e2de7f56 | 58 | dlm_put_lockspace(ls); |
e7fd4179 DT |
59 | return ret; |
60 | } | |
61 | ||
62 | static ssize_t dlm_event_store(struct dlm_ls *ls, const char *buf, size_t len) | |
63 | { | |
6edb5687 FF |
64 | int rc = kstrtoint(buf, 0, &ls->ls_uevent_result); |
65 | ||
66 | if (rc) | |
67 | return rc; | |
e7fd4179 DT |
68 | set_bit(LSFL_UEVENT_WAIT, &ls->ls_flags); |
69 | wake_up(&ls->ls_uevent_wait); | |
70 | return len; | |
71 | } | |
72 | ||
73 | static ssize_t dlm_id_show(struct dlm_ls *ls, char *buf) | |
74 | { | |
a1d144c7 | 75 | return snprintf(buf, PAGE_SIZE, "%u\n", ls->ls_global_id); |
e7fd4179 DT |
76 | } |
77 | ||
78 | static ssize_t dlm_id_store(struct dlm_ls *ls, const char *buf, size_t len) | |
79 | { | |
6edb5687 FF |
80 | int rc = kstrtouint(buf, 0, &ls->ls_global_id); |
81 | ||
82 | if (rc) | |
83 | return rc; | |
e7fd4179 DT |
84 | return len; |
85 | } | |
86 | ||
4875647a DT |
87 | static ssize_t dlm_nodir_show(struct dlm_ls *ls, char *buf) |
88 | { | |
89 | return snprintf(buf, PAGE_SIZE, "%u\n", dlm_no_directory(ls)); | |
90 | } | |
91 | ||
92 | static ssize_t dlm_nodir_store(struct dlm_ls *ls, const char *buf, size_t len) | |
93 | { | |
6edb5687 FF |
94 | int val; |
95 | int rc = kstrtoint(buf, 0, &val); | |
96 | ||
97 | if (rc) | |
98 | return rc; | |
4875647a DT |
99 | if (val == 1) |
100 | set_bit(LSFL_NODIR, &ls->ls_flags); | |
101 | return len; | |
102 | } | |
103 | ||
c56b39cd DT |
104 | static ssize_t dlm_recover_status_show(struct dlm_ls *ls, char *buf) |
105 | { | |
106 | uint32_t status = dlm_recover_status(ls); | |
a1d144c7 | 107 | return snprintf(buf, PAGE_SIZE, "%x\n", status); |
c56b39cd DT |
108 | } |
109 | ||
faa0f267 DT |
110 | static ssize_t dlm_recover_nodeid_show(struct dlm_ls *ls, char *buf) |
111 | { | |
a1d144c7 | 112 | return snprintf(buf, PAGE_SIZE, "%d\n", ls->ls_recover_nodeid); |
faa0f267 DT |
113 | } |
114 | ||
e7fd4179 DT |
115 | struct dlm_attr { |
116 | struct attribute attr; | |
117 | ssize_t (*show)(struct dlm_ls *, char *); | |
118 | ssize_t (*store)(struct dlm_ls *, const char *, size_t); | |
119 | }; | |
120 | ||
121 | static struct dlm_attr dlm_attr_control = { | |
122 | .attr = {.name = "control", .mode = S_IWUSR}, | |
123 | .store = dlm_control_store | |
124 | }; | |
125 | ||
126 | static struct dlm_attr dlm_attr_event = { | |
127 | .attr = {.name = "event_done", .mode = S_IWUSR}, | |
128 | .store = dlm_event_store | |
129 | }; | |
130 | ||
131 | static struct dlm_attr dlm_attr_id = { | |
132 | .attr = {.name = "id", .mode = S_IRUGO | S_IWUSR}, | |
133 | .show = dlm_id_show, | |
134 | .store = dlm_id_store | |
135 | }; | |
136 | ||
4875647a DT |
137 | static struct dlm_attr dlm_attr_nodir = { |
138 | .attr = {.name = "nodir", .mode = S_IRUGO | S_IWUSR}, | |
139 | .show = dlm_nodir_show, | |
140 | .store = dlm_nodir_store | |
141 | }; | |
142 | ||
c56b39cd DT |
143 | static struct dlm_attr dlm_attr_recover_status = { |
144 | .attr = {.name = "recover_status", .mode = S_IRUGO}, | |
145 | .show = dlm_recover_status_show | |
146 | }; | |
147 | ||
faa0f267 DT |
148 | static struct dlm_attr dlm_attr_recover_nodeid = { |
149 | .attr = {.name = "recover_nodeid", .mode = S_IRUGO}, | |
150 | .show = dlm_recover_nodeid_show | |
151 | }; | |
152 | ||
e7fd4179 DT |
153 | static struct attribute *dlm_attrs[] = { |
154 | &dlm_attr_control.attr, | |
155 | &dlm_attr_event.attr, | |
156 | &dlm_attr_id.attr, | |
4875647a | 157 | &dlm_attr_nodir.attr, |
c56b39cd | 158 | &dlm_attr_recover_status.attr, |
faa0f267 | 159 | &dlm_attr_recover_nodeid.attr, |
e7fd4179 DT |
160 | NULL, |
161 | }; | |
c9c5b5e1 | 162 | ATTRIBUTE_GROUPS(dlm); |
e7fd4179 DT |
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 = { | |
c9c5b5e1 | 192 | .default_groups = dlm_groups, |
e7fd4179 | 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 | { | |
e7fd4179 DT |
201 | if (in) |
202 | kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE); | |
203 | else | |
204 | kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE); | |
205 | ||
075f0177 | 206 | log_rinfo(ls, "%s the lockspace group...", in ? "joining" : "leaving"); |
8b0e7b2c DT |
207 | |
208 | /* dlm_controld will see the uevent, do the necessary group management | |
209 | and then write to sysfs to wake us */ | |
210 | ||
f084a4f4 RL |
211 | wait_event(ls->ls_uevent_wait, |
212 | test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags)); | |
8b0e7b2c | 213 | |
f084a4f4 | 214 | log_rinfo(ls, "group event done %d", ls->ls_uevent_result); |
e7fd4179 | 215 | |
f084a4f4 | 216 | return ls->ls_uevent_result; |
e7fd4179 DT |
217 | } |
218 | ||
b4a5d4bc SW |
219 | static int dlm_uevent(struct kset *kset, struct kobject *kobj, |
220 | struct kobj_uevent_env *env) | |
221 | { | |
222 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
223 | ||
224 | add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name); | |
225 | return 0; | |
226 | } | |
227 | ||
417f7c59 | 228 | static const struct kset_uevent_ops dlm_uevent_ops = { |
b4a5d4bc SW |
229 | .uevent = dlm_uevent, |
230 | }; | |
e7fd4179 | 231 | |
30727174 | 232 | int __init dlm_lockspace_init(void) |
e7fd4179 | 233 | { |
e7fd4179 | 234 | ls_count = 0; |
90135925 | 235 | mutex_init(&ls_lock); |
e7fd4179 DT |
236 | INIT_LIST_HEAD(&lslist); |
237 | spin_lock_init(&lslist_lock); | |
238 | ||
b4a5d4bc | 239 | dlm_kset = kset_create_and_add("dlm", &dlm_uevent_ops, kernel_kobj); |
d405936b | 240 | if (!dlm_kset) { |
8e24eea7 | 241 | printk(KERN_WARNING "%s: can not create kset\n", __func__); |
d405936b GKH |
242 | return -ENOMEM; |
243 | } | |
244 | return 0; | |
e7fd4179 DT |
245 | } |
246 | ||
247 | void dlm_lockspace_exit(void) | |
248 | { | |
d405936b | 249 | kset_unregister(dlm_kset); |
e7fd4179 DT |
250 | } |
251 | ||
c1dcf65f DT |
252 | static struct dlm_ls *find_ls_to_scan(void) |
253 | { | |
254 | struct dlm_ls *ls; | |
255 | ||
256 | spin_lock(&lslist_lock); | |
257 | list_for_each_entry(ls, &lslist, ls_list) { | |
258 | if (time_after_eq(jiffies, ls->ls_scan_time + | |
259 | dlm_config.ci_scan_secs * HZ)) { | |
260 | spin_unlock(&lslist_lock); | |
261 | return ls; | |
262 | } | |
263 | } | |
264 | spin_unlock(&lslist_lock); | |
265 | return NULL; | |
266 | } | |
267 | ||
e7fd4179 DT |
268 | static int dlm_scand(void *data) |
269 | { | |
270 | struct dlm_ls *ls; | |
271 | ||
272 | while (!kthread_should_stop()) { | |
c1dcf65f DT |
273 | ls = find_ls_to_scan(); |
274 | if (ls) { | |
85e86edf | 275 | if (dlm_lock_recovery_try(ls)) { |
c1dcf65f | 276 | ls->ls_scan_time = jiffies; |
85e86edf | 277 | dlm_scan_rsbs(ls); |
3ae1acf9 | 278 | dlm_scan_timeout(ls); |
c6ff669b | 279 | dlm_scan_waiters(ls); |
85e86edf | 280 | dlm_unlock_recovery(ls); |
c1dcf65f DT |
281 | } else { |
282 | ls->ls_scan_time += HZ; | |
85e86edf | 283 | } |
c6ff669b | 284 | continue; |
85e86edf | 285 | } |
c6ff669b | 286 | schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ); |
e7fd4179 DT |
287 | } |
288 | return 0; | |
289 | } | |
290 | ||
291 | static int dlm_scand_start(void) | |
292 | { | |
293 | struct task_struct *p; | |
294 | int error = 0; | |
295 | ||
296 | p = kthread_run(dlm_scand, NULL, "dlm_scand"); | |
297 | if (IS_ERR(p)) | |
298 | error = PTR_ERR(p); | |
299 | else | |
300 | scand_task = p; | |
301 | return error; | |
302 | } | |
303 | ||
304 | static void dlm_scand_stop(void) | |
305 | { | |
306 | kthread_stop(scand_task); | |
307 | } | |
308 | ||
e7fd4179 DT |
309 | struct dlm_ls *dlm_find_lockspace_global(uint32_t id) |
310 | { | |
311 | struct dlm_ls *ls; | |
312 | ||
313 | spin_lock(&lslist_lock); | |
314 | ||
315 | list_for_each_entry(ls, &lslist, ls_list) { | |
316 | if (ls->ls_global_id == id) { | |
317 | ls->ls_count++; | |
318 | goto out; | |
319 | } | |
320 | } | |
321 | ls = NULL; | |
322 | out: | |
323 | spin_unlock(&lslist_lock); | |
324 | return ls; | |
325 | } | |
326 | ||
597d0cae | 327 | struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace) |
e7fd4179 | 328 | { |
597d0cae | 329 | struct dlm_ls *ls; |
e7fd4179 DT |
330 | |
331 | spin_lock(&lslist_lock); | |
597d0cae DT |
332 | list_for_each_entry(ls, &lslist, ls_list) { |
333 | if (ls->ls_local_handle == lockspace) { | |
334 | ls->ls_count++; | |
335 | goto out; | |
336 | } | |
337 | } | |
338 | ls = NULL; | |
339 | out: | |
340 | spin_unlock(&lslist_lock); | |
341 | return ls; | |
342 | } | |
343 | ||
344 | struct dlm_ls *dlm_find_lockspace_device(int minor) | |
345 | { | |
346 | struct dlm_ls *ls; | |
347 | ||
348 | spin_lock(&lslist_lock); | |
349 | list_for_each_entry(ls, &lslist, ls_list) { | |
350 | if (ls->ls_device.minor == minor) { | |
351 | ls->ls_count++; | |
352 | goto out; | |
353 | } | |
354 | } | |
355 | ls = NULL; | |
356 | out: | |
e7fd4179 DT |
357 | spin_unlock(&lslist_lock); |
358 | return ls; | |
359 | } | |
360 | ||
361 | void dlm_put_lockspace(struct dlm_ls *ls) | |
362 | { | |
363 | spin_lock(&lslist_lock); | |
364 | ls->ls_count--; | |
365 | spin_unlock(&lslist_lock); | |
366 | } | |
367 | ||
368 | static void remove_lockspace(struct dlm_ls *ls) | |
369 | { | |
370 | for (;;) { | |
371 | spin_lock(&lslist_lock); | |
372 | if (ls->ls_count == 0) { | |
0f8e0d9a | 373 | WARN_ON(ls->ls_create_count != 0); |
e7fd4179 DT |
374 | list_del(&ls->ls_list); |
375 | spin_unlock(&lslist_lock); | |
376 | return; | |
377 | } | |
378 | spin_unlock(&lslist_lock); | |
379 | ssleep(1); | |
380 | } | |
381 | } | |
382 | ||
383 | static int threads_start(void) | |
384 | { | |
385 | int error; | |
386 | ||
e7fd4179 DT |
387 | error = dlm_scand_start(); |
388 | if (error) { | |
389 | log_print("cannot start dlm_scand thread %d", error); | |
23e8e1aa | 390 | goto fail; |
e7fd4179 DT |
391 | } |
392 | ||
393 | /* Thread for sending/receiving messages for all lockspace's */ | |
a070a91c | 394 | error = dlm_midcomms_start(); |
e7fd4179 DT |
395 | if (error) { |
396 | log_print("cannot start dlm lowcomms %d", error); | |
397 | goto scand_fail; | |
398 | } | |
399 | ||
400 | return 0; | |
401 | ||
402 | scand_fail: | |
403 | dlm_scand_stop(); | |
e7fd4179 DT |
404 | fail: |
405 | return error; | |
406 | } | |
407 | ||
60f98d18 DT |
408 | static int new_lockspace(const char *name, const char *cluster, |
409 | uint32_t flags, int lvblen, | |
410 | const struct dlm_lockspace_ops *ops, void *ops_arg, | |
411 | int *ops_result, dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
412 | { |
413 | struct dlm_ls *ls; | |
0f8e0d9a | 414 | int i, size, error; |
79d72b54 | 415 | int do_unreg = 0; |
60f98d18 | 416 | int namelen = strlen(name); |
e7fd4179 | 417 | |
3f0806d2 | 418 | if (namelen > DLM_LOCKSPACE_LEN || namelen == 0) |
e7fd4179 DT |
419 | return -EINVAL; |
420 | ||
421 | if (!lvblen || (lvblen % 8)) | |
422 | return -EINVAL; | |
423 | ||
424 | if (!try_module_get(THIS_MODULE)) | |
425 | return -EINVAL; | |
426 | ||
dc68c7ed | 427 | if (!dlm_user_daemon_available()) { |
60f98d18 DT |
428 | log_print("dlm user daemon not available"); |
429 | error = -EUNATCH; | |
430 | goto out; | |
431 | } | |
432 | ||
433 | if (ops && ops_result) { | |
434 | if (!dlm_config.ci_recover_callbacks) | |
435 | *ops_result = -EOPNOTSUPP; | |
436 | else | |
437 | *ops_result = 0; | |
438 | } | |
439 | ||
3b0e761b ZL |
440 | if (!cluster) |
441 | log_print("dlm cluster name '%s' is being used without an application provided cluster name", | |
442 | dlm_config.ci_cluster_name); | |
443 | ||
60f98d18 DT |
444 | if (dlm_config.ci_recover_callbacks && cluster && |
445 | strncmp(cluster, dlm_config.ci_cluster_name, DLM_LOCKSPACE_LEN)) { | |
8e174374 GH |
446 | log_print("dlm cluster name '%s' does not match " |
447 | "the application cluster name '%s'", | |
60f98d18 DT |
448 | dlm_config.ci_cluster_name, cluster); |
449 | error = -EBADR; | |
450 | goto out; | |
dc68c7ed DT |
451 | } |
452 | ||
0f8e0d9a DT |
453 | error = 0; |
454 | ||
455 | spin_lock(&lslist_lock); | |
456 | list_for_each_entry(ls, &lslist, ls_list) { | |
457 | WARN_ON(ls->ls_create_count <= 0); | |
458 | if (ls->ls_namelen != namelen) | |
459 | continue; | |
460 | if (memcmp(ls->ls_name, name, namelen)) | |
461 | continue; | |
462 | if (flags & DLM_LSFL_NEWEXCL) { | |
463 | error = -EEXIST; | |
464 | break; | |
465 | } | |
466 | ls->ls_create_count++; | |
8511a272 DT |
467 | *lockspace = ls; |
468 | error = 1; | |
0f8e0d9a | 469 | break; |
e7fd4179 | 470 | } |
0f8e0d9a DT |
471 | spin_unlock(&lslist_lock); |
472 | ||
0f8e0d9a | 473 | if (error) |
8511a272 | 474 | goto out; |
0f8e0d9a DT |
475 | |
476 | error = -ENOMEM; | |
e7fd4179 | 477 | |
573c24c4 | 478 | ls = kzalloc(sizeof(struct dlm_ls) + namelen, GFP_NOFS); |
e7fd4179 DT |
479 | if (!ls) |
480 | goto out; | |
e7fd4179 DT |
481 | memcpy(ls->ls_name, name, namelen); |
482 | ls->ls_namelen = namelen; | |
e7fd4179 DT |
483 | ls->ls_lvblen = lvblen; |
484 | ls->ls_count = 0; | |
485 | ls->ls_flags = 0; | |
c1dcf65f | 486 | ls->ls_scan_time = jiffies; |
e7fd4179 | 487 | |
60f98d18 DT |
488 | if (ops && dlm_config.ci_recover_callbacks) { |
489 | ls->ls_ops = ops; | |
490 | ls->ls_ops_arg = ops_arg; | |
491 | } | |
492 | ||
3ae1acf9 DT |
493 | if (flags & DLM_LSFL_TIMEWARN) |
494 | set_bit(LSFL_TIMEWARN, &ls->ls_flags); | |
3ae1acf9 | 495 | |
fad59c13 | 496 | /* ls_exflags are forced to match among nodes, and we don't |
0f8e0d9a DT |
497 | need to require all nodes to have some flags set */ |
498 | ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS | | |
499 | DLM_LSFL_NEWEXCL)); | |
fad59c13 | 500 | |
d921a23f | 501 | size = READ_ONCE(dlm_config.ci_rsbtbl_size); |
e7fd4179 DT |
502 | ls->ls_rsbtbl_size = size; |
503 | ||
42bc47b3 | 504 | ls->ls_rsbtbl = vmalloc(array_size(size, sizeof(struct dlm_rsbtable))); |
e7fd4179 DT |
505 | if (!ls->ls_rsbtbl) |
506 | goto out_lsfree; | |
507 | for (i = 0; i < size; i++) { | |
9beb3bf5 BP |
508 | ls->ls_rsbtbl[i].keep.rb_node = NULL; |
509 | ls->ls_rsbtbl[i].toss.rb_node = NULL; | |
c7be761a | 510 | spin_lock_init(&ls->ls_rsbtbl[i].lock); |
e7fd4179 DT |
511 | } |
512 | ||
05c32f47 DT |
513 | spin_lock_init(&ls->ls_remove_spin); |
514 | ||
515 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) { | |
516 | ls->ls_remove_names[i] = kzalloc(DLM_RESNAME_MAXLEN+1, | |
517 | GFP_KERNEL); | |
518 | if (!ls->ls_remove_names[i]) | |
519 | goto out_rsbtbl; | |
520 | } | |
521 | ||
3d6aa675 DT |
522 | idr_init(&ls->ls_lkbidr); |
523 | spin_lock_init(&ls->ls_lkbidr_spin); | |
e7fd4179 | 524 | |
e7fd4179 | 525 | INIT_LIST_HEAD(&ls->ls_waiters); |
90135925 | 526 | mutex_init(&ls->ls_waiters_mutex); |
ef0c2bb0 DT |
527 | INIT_LIST_HEAD(&ls->ls_orphans); |
528 | mutex_init(&ls->ls_orphans_mutex); | |
3ae1acf9 DT |
529 | INIT_LIST_HEAD(&ls->ls_timeout); |
530 | mutex_init(&ls->ls_timeout_mutex); | |
e7fd4179 | 531 | |
3881ac04 DT |
532 | INIT_LIST_HEAD(&ls->ls_new_rsb); |
533 | spin_lock_init(&ls->ls_new_rsb_spin); | |
534 | ||
e7fd4179 DT |
535 | INIT_LIST_HEAD(&ls->ls_nodes); |
536 | INIT_LIST_HEAD(&ls->ls_nodes_gone); | |
537 | ls->ls_num_nodes = 0; | |
538 | ls->ls_low_nodeid = 0; | |
539 | ls->ls_total_weight = 0; | |
540 | ls->ls_node_array = NULL; | |
541 | ||
542 | memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb)); | |
543 | ls->ls_stub_rsb.res_ls = ls; | |
544 | ||
5de6319b DT |
545 | ls->ls_debug_rsb_dentry = NULL; |
546 | ls->ls_debug_waiters_dentry = NULL; | |
e7fd4179 DT |
547 | |
548 | init_waitqueue_head(&ls->ls_uevent_wait); | |
549 | ls->ls_uevent_result = 0; | |
8b0e7b2c DT |
550 | init_completion(&ls->ls_members_done); |
551 | ls->ls_members_result = -1; | |
e7fd4179 | 552 | |
23e8e1aa DT |
553 | mutex_init(&ls->ls_cb_mutex); |
554 | INIT_LIST_HEAD(&ls->ls_cb_delay); | |
555 | ||
e7fd4179 | 556 | ls->ls_recoverd_task = NULL; |
90135925 | 557 | mutex_init(&ls->ls_recoverd_active); |
e7fd4179 | 558 | spin_lock_init(&ls->ls_recover_lock); |
98f176fb DT |
559 | spin_lock_init(&ls->ls_rcom_spin); |
560 | get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t)); | |
e7fd4179 DT |
561 | ls->ls_recover_status = 0; |
562 | ls->ls_recover_seq = 0; | |
563 | ls->ls_recover_args = NULL; | |
564 | init_rwsem(&ls->ls_in_recovery); | |
c36258b5 | 565 | init_rwsem(&ls->ls_recv_active); |
e7fd4179 | 566 | INIT_LIST_HEAD(&ls->ls_requestqueue); |
90135925 | 567 | mutex_init(&ls->ls_requestqueue_mutex); |
597d0cae | 568 | mutex_init(&ls->ls_clear_proc_locks); |
e7fd4179 | 569 | |
489d8e55 AA |
570 | /* Due backwards compatibility with 3.1 we need to use maximum |
571 | * possible dlm message size to be sure the message will fit and | |
572 | * not having out of bounds issues. However on sending side 3.2 | |
573 | * might send less. | |
574 | */ | |
d10a0b88 | 575 | ls->ls_recover_buf = kmalloc(DLM_MAX_SOCKET_BUFSIZE, GFP_NOFS); |
e7fd4179 | 576 | if (!ls->ls_recover_buf) |
05c32f47 | 577 | goto out_lkbidr; |
e7fd4179 | 578 | |
757a4271 DT |
579 | ls->ls_slot = 0; |
580 | ls->ls_num_slots = 0; | |
581 | ls->ls_slots_size = 0; | |
582 | ls->ls_slots = NULL; | |
583 | ||
e7fd4179 DT |
584 | INIT_LIST_HEAD(&ls->ls_recover_list); |
585 | spin_lock_init(&ls->ls_recover_list_lock); | |
1d7c484e DT |
586 | idr_init(&ls->ls_recover_idr); |
587 | spin_lock_init(&ls->ls_recover_idr_lock); | |
e7fd4179 | 588 | ls->ls_recover_list_count = 0; |
597d0cae | 589 | ls->ls_local_handle = ls; |
e7fd4179 DT |
590 | init_waitqueue_head(&ls->ls_wait_general); |
591 | INIT_LIST_HEAD(&ls->ls_root_list); | |
592 | init_rwsem(&ls->ls_root_sem); | |
593 | ||
5f88f1ea | 594 | spin_lock(&lslist_lock); |
0f8e0d9a | 595 | ls->ls_create_count = 1; |
5f88f1ea DT |
596 | list_add(&ls->ls_list, &lslist); |
597 | spin_unlock(&lslist_lock); | |
598 | ||
23e8e1aa DT |
599 | if (flags & DLM_LSFL_FS) { |
600 | error = dlm_callback_start(ls); | |
601 | if (error) { | |
602 | log_error(ls, "can't start dlm_callback %d", error); | |
603 | goto out_delist; | |
604 | } | |
605 | } | |
606 | ||
475f230c DT |
607 | init_waitqueue_head(&ls->ls_recover_lock_wait); |
608 | ||
609 | /* | |
610 | * Once started, dlm_recoverd first looks for ls in lslist, then | |
611 | * initializes ls_in_recovery as locked in "down" mode. We need | |
612 | * to wait for the wakeup from dlm_recoverd because in_recovery | |
613 | * has to start out in down mode. | |
614 | */ | |
615 | ||
e7fd4179 DT |
616 | error = dlm_recoverd_start(ls); |
617 | if (error) { | |
618 | log_error(ls, "can't start dlm_recoverd %d", error); | |
23e8e1aa | 619 | goto out_callback; |
e7fd4179 DT |
620 | } |
621 | ||
475f230c DT |
622 | wait_event(ls->ls_recover_lock_wait, |
623 | test_bit(LSFL_RECOVER_LOCK, &ls->ls_flags)); | |
624 | ||
0ffddafc WH |
625 | /* let kobject handle freeing of ls if there's an error */ |
626 | do_unreg = 1; | |
627 | ||
901195ed GKH |
628 | ls->ls_kobj.kset = dlm_kset; |
629 | error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL, | |
630 | "%s", ls->ls_name); | |
e7fd4179 | 631 | if (error) |
23e8e1aa | 632 | goto out_recoverd; |
901195ed | 633 | kobject_uevent(&ls->ls_kobj, KOBJ_ADD); |
79d72b54 | 634 | |
8b0e7b2c DT |
635 | /* This uevent triggers dlm_controld in userspace to add us to the |
636 | group of nodes that are members of this lockspace (managed by the | |
637 | cluster infrastructure.) Once it's done that, it tells us who the | |
638 | current lockspace members are (via configfs) and then tells the | |
639 | lockspace to start running (via sysfs) in dlm_ls_start(). */ | |
640 | ||
e7fd4179 DT |
641 | error = do_uevent(ls, 1); |
642 | if (error) | |
23e8e1aa | 643 | goto out_recoverd; |
79d72b54 | 644 | |
8b0e7b2c DT |
645 | wait_for_completion(&ls->ls_members_done); |
646 | error = ls->ls_members_result; | |
647 | if (error) | |
648 | goto out_members; | |
649 | ||
79d72b54 DT |
650 | dlm_create_debug_file(ls); |
651 | ||
075f0177 | 652 | log_rinfo(ls, "join complete"); |
e7fd4179 DT |
653 | *lockspace = ls; |
654 | return 0; | |
655 | ||
8b0e7b2c DT |
656 | out_members: |
657 | do_uevent(ls, 0); | |
658 | dlm_clear_members(ls); | |
659 | kfree(ls->ls_node_array); | |
23e8e1aa | 660 | out_recoverd: |
5f88f1ea | 661 | dlm_recoverd_stop(ls); |
23e8e1aa DT |
662 | out_callback: |
663 | dlm_callback_stop(ls); | |
79d72b54 | 664 | out_delist: |
e7fd4179 DT |
665 | spin_lock(&lslist_lock); |
666 | list_del(&ls->ls_list); | |
667 | spin_unlock(&lslist_lock); | |
1d7c484e | 668 | idr_destroy(&ls->ls_recover_idr); |
e7fd4179 | 669 | kfree(ls->ls_recover_buf); |
05c32f47 | 670 | out_lkbidr: |
3d6aa675 | 671 | idr_destroy(&ls->ls_lkbidr); |
b982896c | 672 | out_rsbtbl: |
3456880f TM |
673 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) |
674 | kfree(ls->ls_remove_names[i]); | |
c282af49 | 675 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 676 | out_lsfree: |
79d72b54 | 677 | if (do_unreg) |
197b12d6 | 678 | kobject_put(&ls->ls_kobj); |
79d72b54 DT |
679 | else |
680 | kfree(ls); | |
e7fd4179 DT |
681 | out: |
682 | module_put(THIS_MODULE); | |
683 | return error; | |
684 | } | |
685 | ||
60f98d18 DT |
686 | int dlm_new_lockspace(const char *name, const char *cluster, |
687 | uint32_t flags, int lvblen, | |
688 | const struct dlm_lockspace_ops *ops, void *ops_arg, | |
689 | int *ops_result, dlm_lockspace_t **lockspace) | |
e7fd4179 DT |
690 | { |
691 | int error = 0; | |
692 | ||
90135925 | 693 | mutex_lock(&ls_lock); |
e7fd4179 DT |
694 | if (!ls_count) |
695 | error = threads_start(); | |
696 | if (error) | |
697 | goto out; | |
698 | ||
60f98d18 DT |
699 | error = new_lockspace(name, cluster, flags, lvblen, ops, ops_arg, |
700 | ops_result, lockspace); | |
e7fd4179 DT |
701 | if (!error) |
702 | ls_count++; | |
8511a272 DT |
703 | if (error > 0) |
704 | error = 0; | |
9d232469 AA |
705 | if (!ls_count) { |
706 | dlm_scand_stop(); | |
a070a91c | 707 | dlm_midcomms_shutdown(); |
9d232469 AA |
708 | dlm_lowcomms_stop(); |
709 | } | |
e7fd4179 | 710 | out: |
90135925 | 711 | mutex_unlock(&ls_lock); |
e7fd4179 DT |
712 | return error; |
713 | } | |
714 | ||
3d6aa675 | 715 | static int lkb_idr_is_local(int id, void *p, void *data) |
e7fd4179 | 716 | { |
3d6aa675 DT |
717 | struct dlm_lkb *lkb = p; |
718 | ||
a97f4a66 | 719 | return lkb->lkb_nodeid == 0 && lkb->lkb_grmode != DLM_LOCK_IV; |
3d6aa675 DT |
720 | } |
721 | ||
722 | static int lkb_idr_is_any(int id, void *p, void *data) | |
723 | { | |
724 | return 1; | |
725 | } | |
726 | ||
727 | static int lkb_idr_free(int id, void *p, void *data) | |
728 | { | |
729 | struct dlm_lkb *lkb = p; | |
730 | ||
3d6aa675 DT |
731 | if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY) |
732 | dlm_free_lvb(lkb->lkb_lvbptr); | |
733 | ||
734 | dlm_free_lkb(lkb); | |
735 | return 0; | |
736 | } | |
737 | ||
738 | /* NOTE: We check the lkbidr here rather than the resource table. | |
739 | This is because there may be LKBs queued as ASTs that have been unlinked | |
740 | from their RSBs and are pending deletion once the AST has been delivered */ | |
741 | ||
742 | static int lockspace_busy(struct dlm_ls *ls, int force) | |
743 | { | |
744 | int rv; | |
745 | ||
746 | spin_lock(&ls->ls_lkbidr_spin); | |
747 | if (force == 0) { | |
748 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls); | |
749 | } else if (force == 1) { | |
750 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_local, ls); | |
751 | } else { | |
752 | rv = 0; | |
e7fd4179 | 753 | } |
3d6aa675 DT |
754 | spin_unlock(&ls->ls_lkbidr_spin); |
755 | return rv; | |
e7fd4179 DT |
756 | } |
757 | ||
758 | static int release_lockspace(struct dlm_ls *ls, int force) | |
759 | { | |
e7fd4179 | 760 | struct dlm_rsb *rsb; |
9beb3bf5 | 761 | struct rb_node *n; |
0f8e0d9a DT |
762 | int i, busy, rv; |
763 | ||
3d6aa675 | 764 | busy = lockspace_busy(ls, force); |
0f8e0d9a DT |
765 | |
766 | spin_lock(&lslist_lock); | |
767 | if (ls->ls_create_count == 1) { | |
3d6aa675 | 768 | if (busy) { |
0f8e0d9a | 769 | rv = -EBUSY; |
3d6aa675 | 770 | } else { |
0f8e0d9a DT |
771 | /* remove_lockspace takes ls off lslist */ |
772 | ls->ls_create_count = 0; | |
773 | rv = 0; | |
774 | } | |
775 | } else if (ls->ls_create_count > 1) { | |
776 | rv = --ls->ls_create_count; | |
777 | } else { | |
778 | rv = -EINVAL; | |
779 | } | |
780 | spin_unlock(&lslist_lock); | |
781 | ||
782 | if (rv) { | |
783 | log_debug(ls, "release_lockspace no remove %d", rv); | |
784 | return rv; | |
785 | } | |
e7fd4179 | 786 | |
0f8e0d9a | 787 | dlm_device_deregister(ls); |
e7fd4179 | 788 | |
dc68c7ed | 789 | if (force < 3 && dlm_user_daemon_available()) |
e7fd4179 DT |
790 | do_uevent(ls, 0); |
791 | ||
792 | dlm_recoverd_stop(ls); | |
793 | ||
9d232469 AA |
794 | if (ls_count == 1) { |
795 | dlm_scand_stop(); | |
a070a91c | 796 | dlm_midcomms_shutdown(); |
9d232469 AA |
797 | } |
798 | ||
23e8e1aa DT |
799 | dlm_callback_stop(ls); |
800 | ||
e7fd4179 DT |
801 | remove_lockspace(ls); |
802 | ||
803 | dlm_delete_debug_file(ls); | |
804 | ||
8fc6ed9a | 805 | idr_destroy(&ls->ls_recover_idr); |
e7fd4179 DT |
806 | kfree(ls->ls_recover_buf); |
807 | ||
e7fd4179 | 808 | /* |
3d6aa675 | 809 | * Free all lkb's in idr |
e7fd4179 DT |
810 | */ |
811 | ||
3d6aa675 | 812 | idr_for_each(&ls->ls_lkbidr, lkb_idr_free, ls); |
3d6aa675 | 813 | idr_destroy(&ls->ls_lkbidr); |
e7fd4179 | 814 | |
e7fd4179 DT |
815 | /* |
816 | * Free all rsb's on rsbtbl[] lists | |
817 | */ | |
818 | ||
819 | for (i = 0; i < ls->ls_rsbtbl_size; i++) { | |
9beb3bf5 BP |
820 | while ((n = rb_first(&ls->ls_rsbtbl[i].keep))) { |
821 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
822 | rb_erase(n, &ls->ls_rsbtbl[i].keep); | |
52bda2b5 | 823 | dlm_free_rsb(rsb); |
e7fd4179 DT |
824 | } |
825 | ||
9beb3bf5 BP |
826 | while ((n = rb_first(&ls->ls_rsbtbl[i].toss))) { |
827 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
828 | rb_erase(n, &ls->ls_rsbtbl[i].toss); | |
52bda2b5 | 829 | dlm_free_rsb(rsb); |
e7fd4179 DT |
830 | } |
831 | } | |
832 | ||
c282af49 | 833 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 834 | |
05c32f47 DT |
835 | for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) |
836 | kfree(ls->ls_remove_names[i]); | |
837 | ||
3881ac04 DT |
838 | while (!list_empty(&ls->ls_new_rsb)) { |
839 | rsb = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb, | |
840 | res_hashchain); | |
841 | list_del(&rsb->res_hashchain); | |
842 | dlm_free_rsb(rsb); | |
843 | } | |
844 | ||
e7fd4179 DT |
845 | /* |
846 | * Free structures on any other lists | |
847 | */ | |
848 | ||
2896ee37 | 849 | dlm_purge_requestqueue(ls); |
e7fd4179 | 850 | kfree(ls->ls_recover_args); |
e7fd4179 DT |
851 | dlm_clear_members(ls); |
852 | dlm_clear_members_gone(ls); | |
853 | kfree(ls->ls_node_array); | |
075f0177 | 854 | log_rinfo(ls, "release_lockspace final free"); |
197b12d6 | 855 | kobject_put(&ls->ls_kobj); |
79d72b54 | 856 | /* The ls structure will be freed when the kobject is done with */ |
e7fd4179 | 857 | |
e7fd4179 DT |
858 | module_put(THIS_MODULE); |
859 | return 0; | |
860 | } | |
861 | ||
862 | /* | |
863 | * Called when a system has released all its locks and is not going to use the | |
864 | * lockspace any longer. We free everything we're managing for this lockspace. | |
865 | * Remaining nodes will go through the recovery process as if we'd died. The | |
866 | * lockspace must continue to function as usual, participating in recoveries, | |
867 | * until this returns. | |
868 | * | |
869 | * Force has 4 possible values: | |
870 | * 0 - don't destroy locksapce if it has any LKBs | |
871 | * 1 - destroy lockspace if it has remote LKBs but not if it has local LKBs | |
872 | * 2 - destroy lockspace regardless of LKBs | |
873 | * 3 - destroy lockspace as part of a forced shutdown | |
874 | */ | |
875 | ||
876 | int dlm_release_lockspace(void *lockspace, int force) | |
877 | { | |
878 | struct dlm_ls *ls; | |
0f8e0d9a | 879 | int error; |
e7fd4179 DT |
880 | |
881 | ls = dlm_find_lockspace_local(lockspace); | |
882 | if (!ls) | |
883 | return -EINVAL; | |
884 | dlm_put_lockspace(ls); | |
0f8e0d9a DT |
885 | |
886 | mutex_lock(&ls_lock); | |
887 | error = release_lockspace(ls, force); | |
888 | if (!error) | |
889 | ls_count--; | |
278afcbf | 890 | if (!ls_count) |
9d232469 | 891 | dlm_lowcomms_stop(); |
0f8e0d9a DT |
892 | mutex_unlock(&ls_lock); |
893 | ||
894 | return error; | |
e7fd4179 DT |
895 | } |
896 | ||
dc68c7ed DT |
897 | void dlm_stop_lockspaces(void) |
898 | { | |
899 | struct dlm_ls *ls; | |
696b3d84 | 900 | int count; |
dc68c7ed DT |
901 | |
902 | restart: | |
696b3d84 | 903 | count = 0; |
dc68c7ed DT |
904 | spin_lock(&lslist_lock); |
905 | list_for_each_entry(ls, &lslist, ls_list) { | |
696b3d84 DT |
906 | if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) { |
907 | count++; | |
dc68c7ed | 908 | continue; |
696b3d84 | 909 | } |
dc68c7ed DT |
910 | spin_unlock(&lslist_lock); |
911 | log_error(ls, "no userland control daemon, stopping lockspace"); | |
912 | dlm_ls_stop(ls); | |
913 | goto restart; | |
914 | } | |
915 | spin_unlock(&lslist_lock); | |
696b3d84 DT |
916 | |
917 | if (count) | |
918 | log_print("dlm user daemon left %d lockspaces", count); | |
dc68c7ed DT |
919 | } |
920 |