Commit | Line | Data |
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e7fd4179 DT |
1 | /****************************************************************************** |
2 | ******************************************************************************* | |
3 | ** | |
4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
0f8e0d9a | 5 | ** Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
e7fd4179 DT |
6 | ** |
7 | ** This copyrighted material is made available to anyone wishing to use, | |
8 | ** modify, copy, or redistribute it subject to the terms and conditions | |
9 | ** of the GNU General Public License v.2. | |
10 | ** | |
11 | ******************************************************************************* | |
12 | ******************************************************************************/ | |
13 | ||
14 | #include "dlm_internal.h" | |
15 | #include "lockspace.h" | |
16 | #include "member.h" | |
17 | #include "recoverd.h" | |
e7fd4179 DT |
18 | #include "dir.h" |
19 | #include "lowcomms.h" | |
20 | #include "config.h" | |
21 | #include "memory.h" | |
22 | #include "lock.h" | |
c56b39cd | 23 | #include "recover.h" |
2896ee37 | 24 | #include "requestqueue.h" |
0f8e0d9a | 25 | #include "user.h" |
23e8e1aa | 26 | #include "ast.h" |
e7fd4179 | 27 | |
e7fd4179 | 28 | static int ls_count; |
90135925 | 29 | static struct mutex ls_lock; |
e7fd4179 DT |
30 | static struct list_head lslist; |
31 | static spinlock_t lslist_lock; | |
32 | static struct task_struct * scand_task; | |
33 | ||
34 | ||
35 | static ssize_t dlm_control_store(struct dlm_ls *ls, const char *buf, size_t len) | |
36 | { | |
37 | ssize_t ret = len; | |
38 | int n = simple_strtol(buf, NULL, 0); | |
39 | ||
e2de7f56 PC |
40 | ls = dlm_find_lockspace_local(ls->ls_local_handle); |
41 | if (!ls) | |
42 | return -EINVAL; | |
43 | ||
e7fd4179 DT |
44 | switch (n) { |
45 | case 0: | |
46 | dlm_ls_stop(ls); | |
47 | break; | |
48 | case 1: | |
49 | dlm_ls_start(ls); | |
50 | break; | |
51 | default: | |
52 | ret = -EINVAL; | |
53 | } | |
e2de7f56 | 54 | dlm_put_lockspace(ls); |
e7fd4179 DT |
55 | return ret; |
56 | } | |
57 | ||
58 | static ssize_t dlm_event_store(struct dlm_ls *ls, const char *buf, size_t len) | |
59 | { | |
60 | ls->ls_uevent_result = simple_strtol(buf, NULL, 0); | |
61 | set_bit(LSFL_UEVENT_WAIT, &ls->ls_flags); | |
62 | wake_up(&ls->ls_uevent_wait); | |
63 | return len; | |
64 | } | |
65 | ||
66 | static ssize_t dlm_id_show(struct dlm_ls *ls, char *buf) | |
67 | { | |
a1d144c7 | 68 | return snprintf(buf, PAGE_SIZE, "%u\n", ls->ls_global_id); |
e7fd4179 DT |
69 | } |
70 | ||
71 | static ssize_t dlm_id_store(struct dlm_ls *ls, const char *buf, size_t len) | |
72 | { | |
73 | ls->ls_global_id = simple_strtoul(buf, NULL, 0); | |
74 | return len; | |
75 | } | |
76 | ||
c56b39cd DT |
77 | static ssize_t dlm_recover_status_show(struct dlm_ls *ls, char *buf) |
78 | { | |
79 | uint32_t status = dlm_recover_status(ls); | |
a1d144c7 | 80 | return snprintf(buf, PAGE_SIZE, "%x\n", status); |
c56b39cd DT |
81 | } |
82 | ||
faa0f267 DT |
83 | static ssize_t dlm_recover_nodeid_show(struct dlm_ls *ls, char *buf) |
84 | { | |
a1d144c7 | 85 | return snprintf(buf, PAGE_SIZE, "%d\n", ls->ls_recover_nodeid); |
faa0f267 DT |
86 | } |
87 | ||
e7fd4179 DT |
88 | struct dlm_attr { |
89 | struct attribute attr; | |
90 | ssize_t (*show)(struct dlm_ls *, char *); | |
91 | ssize_t (*store)(struct dlm_ls *, const char *, size_t); | |
92 | }; | |
93 | ||
94 | static struct dlm_attr dlm_attr_control = { | |
95 | .attr = {.name = "control", .mode = S_IWUSR}, | |
96 | .store = dlm_control_store | |
97 | }; | |
98 | ||
99 | static struct dlm_attr dlm_attr_event = { | |
100 | .attr = {.name = "event_done", .mode = S_IWUSR}, | |
101 | .store = dlm_event_store | |
102 | }; | |
103 | ||
104 | static struct dlm_attr dlm_attr_id = { | |
105 | .attr = {.name = "id", .mode = S_IRUGO | S_IWUSR}, | |
106 | .show = dlm_id_show, | |
107 | .store = dlm_id_store | |
108 | }; | |
109 | ||
c56b39cd DT |
110 | static struct dlm_attr dlm_attr_recover_status = { |
111 | .attr = {.name = "recover_status", .mode = S_IRUGO}, | |
112 | .show = dlm_recover_status_show | |
113 | }; | |
114 | ||
faa0f267 DT |
115 | static struct dlm_attr dlm_attr_recover_nodeid = { |
116 | .attr = {.name = "recover_nodeid", .mode = S_IRUGO}, | |
117 | .show = dlm_recover_nodeid_show | |
118 | }; | |
119 | ||
e7fd4179 DT |
120 | static struct attribute *dlm_attrs[] = { |
121 | &dlm_attr_control.attr, | |
122 | &dlm_attr_event.attr, | |
123 | &dlm_attr_id.attr, | |
c56b39cd | 124 | &dlm_attr_recover_status.attr, |
faa0f267 | 125 | &dlm_attr_recover_nodeid.attr, |
e7fd4179 DT |
126 | NULL, |
127 | }; | |
128 | ||
129 | static ssize_t dlm_attr_show(struct kobject *kobj, struct attribute *attr, | |
130 | char *buf) | |
131 | { | |
132 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
133 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
134 | return a->show ? a->show(ls, buf) : 0; | |
135 | } | |
136 | ||
137 | static ssize_t dlm_attr_store(struct kobject *kobj, struct attribute *attr, | |
138 | const char *buf, size_t len) | |
139 | { | |
140 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
141 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
142 | return a->store ? a->store(ls, buf, len) : len; | |
143 | } | |
144 | ||
ba542e3b PC |
145 | static void lockspace_kobj_release(struct kobject *k) |
146 | { | |
147 | struct dlm_ls *ls = container_of(k, struct dlm_ls, ls_kobj); | |
148 | kfree(ls); | |
149 | } | |
150 | ||
52cf25d0 | 151 | static const struct sysfs_ops dlm_attr_ops = { |
e7fd4179 DT |
152 | .show = dlm_attr_show, |
153 | .store = dlm_attr_store, | |
154 | }; | |
155 | ||
156 | static struct kobj_type dlm_ktype = { | |
157 | .default_attrs = dlm_attrs, | |
158 | .sysfs_ops = &dlm_attr_ops, | |
ba542e3b | 159 | .release = lockspace_kobj_release, |
e7fd4179 DT |
160 | }; |
161 | ||
d405936b | 162 | static struct kset *dlm_kset; |
e7fd4179 | 163 | |
e7fd4179 DT |
164 | static int do_uevent(struct dlm_ls *ls, int in) |
165 | { | |
166 | int error; | |
167 | ||
168 | if (in) | |
169 | kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE); | |
170 | else | |
171 | kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE); | |
172 | ||
8b0e7b2c DT |
173 | log_debug(ls, "%s the lockspace group...", in ? "joining" : "leaving"); |
174 | ||
175 | /* dlm_controld will see the uevent, do the necessary group management | |
176 | and then write to sysfs to wake us */ | |
177 | ||
e7fd4179 DT |
178 | error = wait_event_interruptible(ls->ls_uevent_wait, |
179 | test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags)); | |
8b0e7b2c DT |
180 | |
181 | log_debug(ls, "group event done %d %d", error, ls->ls_uevent_result); | |
182 | ||
e7fd4179 DT |
183 | if (error) |
184 | goto out; | |
185 | ||
186 | error = ls->ls_uevent_result; | |
187 | out: | |
8b0e7b2c DT |
188 | if (error) |
189 | log_error(ls, "group %s failed %d %d", in ? "join" : "leave", | |
190 | error, ls->ls_uevent_result); | |
e7fd4179 DT |
191 | return error; |
192 | } | |
193 | ||
b4a5d4bc SW |
194 | static int dlm_uevent(struct kset *kset, struct kobject *kobj, |
195 | struct kobj_uevent_env *env) | |
196 | { | |
197 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
198 | ||
199 | add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name); | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static struct kset_uevent_ops dlm_uevent_ops = { | |
204 | .uevent = dlm_uevent, | |
205 | }; | |
e7fd4179 | 206 | |
30727174 | 207 | int __init dlm_lockspace_init(void) |
e7fd4179 | 208 | { |
e7fd4179 | 209 | ls_count = 0; |
90135925 | 210 | mutex_init(&ls_lock); |
e7fd4179 DT |
211 | INIT_LIST_HEAD(&lslist); |
212 | spin_lock_init(&lslist_lock); | |
213 | ||
b4a5d4bc | 214 | dlm_kset = kset_create_and_add("dlm", &dlm_uevent_ops, kernel_kobj); |
d405936b | 215 | if (!dlm_kset) { |
8e24eea7 | 216 | printk(KERN_WARNING "%s: can not create kset\n", __func__); |
d405936b GKH |
217 | return -ENOMEM; |
218 | } | |
219 | return 0; | |
e7fd4179 DT |
220 | } |
221 | ||
222 | void dlm_lockspace_exit(void) | |
223 | { | |
d405936b | 224 | kset_unregister(dlm_kset); |
e7fd4179 DT |
225 | } |
226 | ||
c1dcf65f DT |
227 | static struct dlm_ls *find_ls_to_scan(void) |
228 | { | |
229 | struct dlm_ls *ls; | |
230 | ||
231 | spin_lock(&lslist_lock); | |
232 | list_for_each_entry(ls, &lslist, ls_list) { | |
233 | if (time_after_eq(jiffies, ls->ls_scan_time + | |
234 | dlm_config.ci_scan_secs * HZ)) { | |
235 | spin_unlock(&lslist_lock); | |
236 | return ls; | |
237 | } | |
238 | } | |
239 | spin_unlock(&lslist_lock); | |
240 | return NULL; | |
241 | } | |
242 | ||
e7fd4179 DT |
243 | static int dlm_scand(void *data) |
244 | { | |
245 | struct dlm_ls *ls; | |
246 | ||
247 | while (!kthread_should_stop()) { | |
c1dcf65f DT |
248 | ls = find_ls_to_scan(); |
249 | if (ls) { | |
85e86edf | 250 | if (dlm_lock_recovery_try(ls)) { |
c1dcf65f | 251 | ls->ls_scan_time = jiffies; |
85e86edf | 252 | dlm_scan_rsbs(ls); |
3ae1acf9 | 253 | dlm_scan_timeout(ls); |
c6ff669b | 254 | dlm_scan_waiters(ls); |
85e86edf | 255 | dlm_unlock_recovery(ls); |
c1dcf65f DT |
256 | } else { |
257 | ls->ls_scan_time += HZ; | |
85e86edf | 258 | } |
c6ff669b | 259 | continue; |
85e86edf | 260 | } |
c6ff669b | 261 | schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ); |
e7fd4179 DT |
262 | } |
263 | return 0; | |
264 | } | |
265 | ||
266 | static int dlm_scand_start(void) | |
267 | { | |
268 | struct task_struct *p; | |
269 | int error = 0; | |
270 | ||
271 | p = kthread_run(dlm_scand, NULL, "dlm_scand"); | |
272 | if (IS_ERR(p)) | |
273 | error = PTR_ERR(p); | |
274 | else | |
275 | scand_task = p; | |
276 | return error; | |
277 | } | |
278 | ||
279 | static void dlm_scand_stop(void) | |
280 | { | |
281 | kthread_stop(scand_task); | |
282 | } | |
283 | ||
e7fd4179 DT |
284 | struct dlm_ls *dlm_find_lockspace_global(uint32_t id) |
285 | { | |
286 | struct dlm_ls *ls; | |
287 | ||
288 | spin_lock(&lslist_lock); | |
289 | ||
290 | list_for_each_entry(ls, &lslist, ls_list) { | |
291 | if (ls->ls_global_id == id) { | |
292 | ls->ls_count++; | |
293 | goto out; | |
294 | } | |
295 | } | |
296 | ls = NULL; | |
297 | out: | |
298 | spin_unlock(&lslist_lock); | |
299 | return ls; | |
300 | } | |
301 | ||
597d0cae | 302 | struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace) |
e7fd4179 | 303 | { |
597d0cae | 304 | struct dlm_ls *ls; |
e7fd4179 DT |
305 | |
306 | spin_lock(&lslist_lock); | |
597d0cae DT |
307 | list_for_each_entry(ls, &lslist, ls_list) { |
308 | if (ls->ls_local_handle == lockspace) { | |
309 | ls->ls_count++; | |
310 | goto out; | |
311 | } | |
312 | } | |
313 | ls = NULL; | |
314 | out: | |
315 | spin_unlock(&lslist_lock); | |
316 | return ls; | |
317 | } | |
318 | ||
319 | struct dlm_ls *dlm_find_lockspace_device(int minor) | |
320 | { | |
321 | struct dlm_ls *ls; | |
322 | ||
323 | spin_lock(&lslist_lock); | |
324 | list_for_each_entry(ls, &lslist, ls_list) { | |
325 | if (ls->ls_device.minor == minor) { | |
326 | ls->ls_count++; | |
327 | goto out; | |
328 | } | |
329 | } | |
330 | ls = NULL; | |
331 | out: | |
e7fd4179 DT |
332 | spin_unlock(&lslist_lock); |
333 | return ls; | |
334 | } | |
335 | ||
336 | void dlm_put_lockspace(struct dlm_ls *ls) | |
337 | { | |
338 | spin_lock(&lslist_lock); | |
339 | ls->ls_count--; | |
340 | spin_unlock(&lslist_lock); | |
341 | } | |
342 | ||
343 | static void remove_lockspace(struct dlm_ls *ls) | |
344 | { | |
345 | for (;;) { | |
346 | spin_lock(&lslist_lock); | |
347 | if (ls->ls_count == 0) { | |
0f8e0d9a | 348 | WARN_ON(ls->ls_create_count != 0); |
e7fd4179 DT |
349 | list_del(&ls->ls_list); |
350 | spin_unlock(&lslist_lock); | |
351 | return; | |
352 | } | |
353 | spin_unlock(&lslist_lock); | |
354 | ssleep(1); | |
355 | } | |
356 | } | |
357 | ||
358 | static int threads_start(void) | |
359 | { | |
360 | int error; | |
361 | ||
e7fd4179 DT |
362 | error = dlm_scand_start(); |
363 | if (error) { | |
364 | log_print("cannot start dlm_scand thread %d", error); | |
23e8e1aa | 365 | goto fail; |
e7fd4179 DT |
366 | } |
367 | ||
368 | /* Thread for sending/receiving messages for all lockspace's */ | |
369 | error = dlm_lowcomms_start(); | |
370 | if (error) { | |
371 | log_print("cannot start dlm lowcomms %d", error); | |
372 | goto scand_fail; | |
373 | } | |
374 | ||
375 | return 0; | |
376 | ||
377 | scand_fail: | |
378 | dlm_scand_stop(); | |
e7fd4179 DT |
379 | fail: |
380 | return error; | |
381 | } | |
382 | ||
383 | static void threads_stop(void) | |
384 | { | |
385 | dlm_scand_stop(); | |
386 | dlm_lowcomms_stop(); | |
e7fd4179 DT |
387 | } |
388 | ||
08ce4c91 | 389 | static int new_lockspace(const char *name, int namelen, void **lockspace, |
e7fd4179 DT |
390 | uint32_t flags, int lvblen) |
391 | { | |
392 | struct dlm_ls *ls; | |
0f8e0d9a | 393 | int i, size, error; |
79d72b54 | 394 | int do_unreg = 0; |
e7fd4179 DT |
395 | |
396 | if (namelen > DLM_LOCKSPACE_LEN) | |
397 | return -EINVAL; | |
398 | ||
399 | if (!lvblen || (lvblen % 8)) | |
400 | return -EINVAL; | |
401 | ||
402 | if (!try_module_get(THIS_MODULE)) | |
403 | return -EINVAL; | |
404 | ||
dc68c7ed DT |
405 | if (!dlm_user_daemon_available()) { |
406 | module_put(THIS_MODULE); | |
407 | return -EUNATCH; | |
408 | } | |
409 | ||
0f8e0d9a DT |
410 | error = 0; |
411 | ||
412 | spin_lock(&lslist_lock); | |
413 | list_for_each_entry(ls, &lslist, ls_list) { | |
414 | WARN_ON(ls->ls_create_count <= 0); | |
415 | if (ls->ls_namelen != namelen) | |
416 | continue; | |
417 | if (memcmp(ls->ls_name, name, namelen)) | |
418 | continue; | |
419 | if (flags & DLM_LSFL_NEWEXCL) { | |
420 | error = -EEXIST; | |
421 | break; | |
422 | } | |
423 | ls->ls_create_count++; | |
8511a272 DT |
424 | *lockspace = ls; |
425 | error = 1; | |
0f8e0d9a | 426 | break; |
e7fd4179 | 427 | } |
0f8e0d9a DT |
428 | spin_unlock(&lslist_lock); |
429 | ||
0f8e0d9a | 430 | if (error) |
8511a272 | 431 | goto out; |
0f8e0d9a DT |
432 | |
433 | error = -ENOMEM; | |
e7fd4179 | 434 | |
573c24c4 | 435 | ls = kzalloc(sizeof(struct dlm_ls) + namelen, GFP_NOFS); |
e7fd4179 DT |
436 | if (!ls) |
437 | goto out; | |
e7fd4179 DT |
438 | memcpy(ls->ls_name, name, namelen); |
439 | ls->ls_namelen = namelen; | |
e7fd4179 DT |
440 | ls->ls_lvblen = lvblen; |
441 | ls->ls_count = 0; | |
442 | ls->ls_flags = 0; | |
c1dcf65f | 443 | ls->ls_scan_time = jiffies; |
e7fd4179 | 444 | |
3ae1acf9 DT |
445 | if (flags & DLM_LSFL_TIMEWARN) |
446 | set_bit(LSFL_TIMEWARN, &ls->ls_flags); | |
3ae1acf9 | 447 | |
fad59c13 | 448 | /* ls_exflags are forced to match among nodes, and we don't |
0f8e0d9a DT |
449 | need to require all nodes to have some flags set */ |
450 | ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS | | |
451 | DLM_LSFL_NEWEXCL)); | |
fad59c13 | 452 | |
68c817a1 | 453 | size = dlm_config.ci_rsbtbl_size; |
e7fd4179 DT |
454 | ls->ls_rsbtbl_size = size; |
455 | ||
c282af49 | 456 | ls->ls_rsbtbl = vmalloc(sizeof(struct dlm_rsbtable) * size); |
e7fd4179 DT |
457 | if (!ls->ls_rsbtbl) |
458 | goto out_lsfree; | |
459 | for (i = 0; i < size; i++) { | |
9beb3bf5 BP |
460 | ls->ls_rsbtbl[i].keep.rb_node = NULL; |
461 | ls->ls_rsbtbl[i].toss.rb_node = NULL; | |
c7be761a | 462 | spin_lock_init(&ls->ls_rsbtbl[i].lock); |
e7fd4179 DT |
463 | } |
464 | ||
3d6aa675 DT |
465 | idr_init(&ls->ls_lkbidr); |
466 | spin_lock_init(&ls->ls_lkbidr_spin); | |
e7fd4179 | 467 | |
68c817a1 | 468 | size = dlm_config.ci_dirtbl_size; |
e7fd4179 DT |
469 | ls->ls_dirtbl_size = size; |
470 | ||
c282af49 | 471 | ls->ls_dirtbl = vmalloc(sizeof(struct dlm_dirtable) * size); |
e7fd4179 DT |
472 | if (!ls->ls_dirtbl) |
473 | goto out_lkbfree; | |
474 | for (i = 0; i < size; i++) { | |
475 | INIT_LIST_HEAD(&ls->ls_dirtbl[i].list); | |
305a47b1 | 476 | spin_lock_init(&ls->ls_dirtbl[i].lock); |
e7fd4179 DT |
477 | } |
478 | ||
479 | INIT_LIST_HEAD(&ls->ls_waiters); | |
90135925 | 480 | mutex_init(&ls->ls_waiters_mutex); |
ef0c2bb0 DT |
481 | INIT_LIST_HEAD(&ls->ls_orphans); |
482 | mutex_init(&ls->ls_orphans_mutex); | |
3ae1acf9 DT |
483 | INIT_LIST_HEAD(&ls->ls_timeout); |
484 | mutex_init(&ls->ls_timeout_mutex); | |
e7fd4179 | 485 | |
3881ac04 DT |
486 | INIT_LIST_HEAD(&ls->ls_new_rsb); |
487 | spin_lock_init(&ls->ls_new_rsb_spin); | |
488 | ||
e7fd4179 DT |
489 | INIT_LIST_HEAD(&ls->ls_nodes); |
490 | INIT_LIST_HEAD(&ls->ls_nodes_gone); | |
491 | ls->ls_num_nodes = 0; | |
492 | ls->ls_low_nodeid = 0; | |
493 | ls->ls_total_weight = 0; | |
494 | ls->ls_node_array = NULL; | |
495 | ||
496 | memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb)); | |
497 | ls->ls_stub_rsb.res_ls = ls; | |
498 | ||
5de6319b DT |
499 | ls->ls_debug_rsb_dentry = NULL; |
500 | ls->ls_debug_waiters_dentry = NULL; | |
e7fd4179 DT |
501 | |
502 | init_waitqueue_head(&ls->ls_uevent_wait); | |
503 | ls->ls_uevent_result = 0; | |
8b0e7b2c DT |
504 | init_completion(&ls->ls_members_done); |
505 | ls->ls_members_result = -1; | |
e7fd4179 | 506 | |
23e8e1aa DT |
507 | mutex_init(&ls->ls_cb_mutex); |
508 | INIT_LIST_HEAD(&ls->ls_cb_delay); | |
509 | ||
e7fd4179 | 510 | ls->ls_recoverd_task = NULL; |
90135925 | 511 | mutex_init(&ls->ls_recoverd_active); |
e7fd4179 | 512 | spin_lock_init(&ls->ls_recover_lock); |
98f176fb DT |
513 | spin_lock_init(&ls->ls_rcom_spin); |
514 | get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t)); | |
e7fd4179 DT |
515 | ls->ls_recover_status = 0; |
516 | ls->ls_recover_seq = 0; | |
517 | ls->ls_recover_args = NULL; | |
518 | init_rwsem(&ls->ls_in_recovery); | |
c36258b5 | 519 | init_rwsem(&ls->ls_recv_active); |
e7fd4179 | 520 | INIT_LIST_HEAD(&ls->ls_requestqueue); |
90135925 | 521 | mutex_init(&ls->ls_requestqueue_mutex); |
597d0cae | 522 | mutex_init(&ls->ls_clear_proc_locks); |
e7fd4179 | 523 | |
573c24c4 | 524 | ls->ls_recover_buf = kmalloc(dlm_config.ci_buffer_size, GFP_NOFS); |
e7fd4179 DT |
525 | if (!ls->ls_recover_buf) |
526 | goto out_dirfree; | |
527 | ||
757a4271 DT |
528 | ls->ls_slot = 0; |
529 | ls->ls_num_slots = 0; | |
530 | ls->ls_slots_size = 0; | |
531 | ls->ls_slots = NULL; | |
532 | ||
e7fd4179 DT |
533 | INIT_LIST_HEAD(&ls->ls_recover_list); |
534 | spin_lock_init(&ls->ls_recover_list_lock); | |
535 | ls->ls_recover_list_count = 0; | |
597d0cae | 536 | ls->ls_local_handle = ls; |
e7fd4179 DT |
537 | init_waitqueue_head(&ls->ls_wait_general); |
538 | INIT_LIST_HEAD(&ls->ls_root_list); | |
539 | init_rwsem(&ls->ls_root_sem); | |
540 | ||
541 | down_write(&ls->ls_in_recovery); | |
542 | ||
5f88f1ea | 543 | spin_lock(&lslist_lock); |
0f8e0d9a | 544 | ls->ls_create_count = 1; |
5f88f1ea DT |
545 | list_add(&ls->ls_list, &lslist); |
546 | spin_unlock(&lslist_lock); | |
547 | ||
23e8e1aa DT |
548 | if (flags & DLM_LSFL_FS) { |
549 | error = dlm_callback_start(ls); | |
550 | if (error) { | |
551 | log_error(ls, "can't start dlm_callback %d", error); | |
552 | goto out_delist; | |
553 | } | |
554 | } | |
555 | ||
5f88f1ea | 556 | /* needs to find ls in lslist */ |
e7fd4179 DT |
557 | error = dlm_recoverd_start(ls); |
558 | if (error) { | |
559 | log_error(ls, "can't start dlm_recoverd %d", error); | |
23e8e1aa | 560 | goto out_callback; |
e7fd4179 DT |
561 | } |
562 | ||
901195ed GKH |
563 | ls->ls_kobj.kset = dlm_kset; |
564 | error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL, | |
565 | "%s", ls->ls_name); | |
e7fd4179 | 566 | if (error) |
23e8e1aa | 567 | goto out_recoverd; |
901195ed | 568 | kobject_uevent(&ls->ls_kobj, KOBJ_ADD); |
79d72b54 DT |
569 | |
570 | /* let kobject handle freeing of ls if there's an error */ | |
571 | do_unreg = 1; | |
e7fd4179 | 572 | |
8b0e7b2c DT |
573 | /* This uevent triggers dlm_controld in userspace to add us to the |
574 | group of nodes that are members of this lockspace (managed by the | |
575 | cluster infrastructure.) Once it's done that, it tells us who the | |
576 | current lockspace members are (via configfs) and then tells the | |
577 | lockspace to start running (via sysfs) in dlm_ls_start(). */ | |
578 | ||
e7fd4179 DT |
579 | error = do_uevent(ls, 1); |
580 | if (error) | |
23e8e1aa | 581 | goto out_recoverd; |
79d72b54 | 582 | |
8b0e7b2c DT |
583 | wait_for_completion(&ls->ls_members_done); |
584 | error = ls->ls_members_result; | |
585 | if (error) | |
586 | goto out_members; | |
587 | ||
79d72b54 DT |
588 | dlm_create_debug_file(ls); |
589 | ||
590 | log_debug(ls, "join complete"); | |
e7fd4179 DT |
591 | *lockspace = ls; |
592 | return 0; | |
593 | ||
8b0e7b2c DT |
594 | out_members: |
595 | do_uevent(ls, 0); | |
596 | dlm_clear_members(ls); | |
597 | kfree(ls->ls_node_array); | |
23e8e1aa | 598 | out_recoverd: |
5f88f1ea | 599 | dlm_recoverd_stop(ls); |
23e8e1aa DT |
600 | out_callback: |
601 | dlm_callback_stop(ls); | |
79d72b54 | 602 | out_delist: |
e7fd4179 DT |
603 | spin_lock(&lslist_lock); |
604 | list_del(&ls->ls_list); | |
605 | spin_unlock(&lslist_lock); | |
e7fd4179 DT |
606 | kfree(ls->ls_recover_buf); |
607 | out_dirfree: | |
c282af49 | 608 | vfree(ls->ls_dirtbl); |
e7fd4179 | 609 | out_lkbfree: |
3d6aa675 | 610 | idr_destroy(&ls->ls_lkbidr); |
c282af49 | 611 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 612 | out_lsfree: |
79d72b54 | 613 | if (do_unreg) |
197b12d6 | 614 | kobject_put(&ls->ls_kobj); |
79d72b54 DT |
615 | else |
616 | kfree(ls); | |
e7fd4179 DT |
617 | out: |
618 | module_put(THIS_MODULE); | |
619 | return error; | |
620 | } | |
621 | ||
08ce4c91 | 622 | int dlm_new_lockspace(const char *name, int namelen, void **lockspace, |
e7fd4179 DT |
623 | uint32_t flags, int lvblen) |
624 | { | |
625 | int error = 0; | |
626 | ||
90135925 | 627 | mutex_lock(&ls_lock); |
e7fd4179 DT |
628 | if (!ls_count) |
629 | error = threads_start(); | |
630 | if (error) | |
631 | goto out; | |
632 | ||
633 | error = new_lockspace(name, namelen, lockspace, flags, lvblen); | |
634 | if (!error) | |
635 | ls_count++; | |
8511a272 DT |
636 | if (error > 0) |
637 | error = 0; | |
638 | if (!ls_count) | |
8b0e7b2c | 639 | threads_stop(); |
e7fd4179 | 640 | out: |
90135925 | 641 | mutex_unlock(&ls_lock); |
e7fd4179 DT |
642 | return error; |
643 | } | |
644 | ||
3d6aa675 | 645 | static int lkb_idr_is_local(int id, void *p, void *data) |
e7fd4179 | 646 | { |
3d6aa675 DT |
647 | struct dlm_lkb *lkb = p; |
648 | ||
649 | if (!lkb->lkb_nodeid) | |
650 | return 1; | |
651 | return 0; | |
652 | } | |
653 | ||
654 | static int lkb_idr_is_any(int id, void *p, void *data) | |
655 | { | |
656 | return 1; | |
657 | } | |
658 | ||
659 | static int lkb_idr_free(int id, void *p, void *data) | |
660 | { | |
661 | struct dlm_lkb *lkb = p; | |
662 | ||
3d6aa675 DT |
663 | if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY) |
664 | dlm_free_lvb(lkb->lkb_lvbptr); | |
665 | ||
666 | dlm_free_lkb(lkb); | |
667 | return 0; | |
668 | } | |
669 | ||
670 | /* NOTE: We check the lkbidr here rather than the resource table. | |
671 | This is because there may be LKBs queued as ASTs that have been unlinked | |
672 | from their RSBs and are pending deletion once the AST has been delivered */ | |
673 | ||
674 | static int lockspace_busy(struct dlm_ls *ls, int force) | |
675 | { | |
676 | int rv; | |
677 | ||
678 | spin_lock(&ls->ls_lkbidr_spin); | |
679 | if (force == 0) { | |
680 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_any, ls); | |
681 | } else if (force == 1) { | |
682 | rv = idr_for_each(&ls->ls_lkbidr, lkb_idr_is_local, ls); | |
683 | } else { | |
684 | rv = 0; | |
e7fd4179 | 685 | } |
3d6aa675 DT |
686 | spin_unlock(&ls->ls_lkbidr_spin); |
687 | return rv; | |
e7fd4179 DT |
688 | } |
689 | ||
690 | static int release_lockspace(struct dlm_ls *ls, int force) | |
691 | { | |
e7fd4179 | 692 | struct dlm_rsb *rsb; |
9beb3bf5 | 693 | struct rb_node *n; |
0f8e0d9a DT |
694 | int i, busy, rv; |
695 | ||
3d6aa675 | 696 | busy = lockspace_busy(ls, force); |
0f8e0d9a DT |
697 | |
698 | spin_lock(&lslist_lock); | |
699 | if (ls->ls_create_count == 1) { | |
3d6aa675 | 700 | if (busy) { |
0f8e0d9a | 701 | rv = -EBUSY; |
3d6aa675 | 702 | } else { |
0f8e0d9a DT |
703 | /* remove_lockspace takes ls off lslist */ |
704 | ls->ls_create_count = 0; | |
705 | rv = 0; | |
706 | } | |
707 | } else if (ls->ls_create_count > 1) { | |
708 | rv = --ls->ls_create_count; | |
709 | } else { | |
710 | rv = -EINVAL; | |
711 | } | |
712 | spin_unlock(&lslist_lock); | |
713 | ||
714 | if (rv) { | |
715 | log_debug(ls, "release_lockspace no remove %d", rv); | |
716 | return rv; | |
717 | } | |
e7fd4179 | 718 | |
0f8e0d9a | 719 | dlm_device_deregister(ls); |
e7fd4179 | 720 | |
dc68c7ed | 721 | if (force < 3 && dlm_user_daemon_available()) |
e7fd4179 DT |
722 | do_uevent(ls, 0); |
723 | ||
724 | dlm_recoverd_stop(ls); | |
725 | ||
23e8e1aa DT |
726 | dlm_callback_stop(ls); |
727 | ||
e7fd4179 DT |
728 | remove_lockspace(ls); |
729 | ||
730 | dlm_delete_debug_file(ls); | |
731 | ||
e7fd4179 DT |
732 | kfree(ls->ls_recover_buf); |
733 | ||
734 | /* | |
735 | * Free direntry structs. | |
736 | */ | |
737 | ||
738 | dlm_dir_clear(ls); | |
c282af49 | 739 | vfree(ls->ls_dirtbl); |
e7fd4179 DT |
740 | |
741 | /* | |
3d6aa675 | 742 | * Free all lkb's in idr |
e7fd4179 DT |
743 | */ |
744 | ||
3d6aa675 DT |
745 | idr_for_each(&ls->ls_lkbidr, lkb_idr_free, ls); |
746 | idr_remove_all(&ls->ls_lkbidr); | |
747 | idr_destroy(&ls->ls_lkbidr); | |
e7fd4179 | 748 | |
e7fd4179 DT |
749 | /* |
750 | * Free all rsb's on rsbtbl[] lists | |
751 | */ | |
752 | ||
753 | for (i = 0; i < ls->ls_rsbtbl_size; i++) { | |
9beb3bf5 BP |
754 | while ((n = rb_first(&ls->ls_rsbtbl[i].keep))) { |
755 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
756 | rb_erase(n, &ls->ls_rsbtbl[i].keep); | |
52bda2b5 | 757 | dlm_free_rsb(rsb); |
e7fd4179 DT |
758 | } |
759 | ||
9beb3bf5 BP |
760 | while ((n = rb_first(&ls->ls_rsbtbl[i].toss))) { |
761 | rsb = rb_entry(n, struct dlm_rsb, res_hashnode); | |
762 | rb_erase(n, &ls->ls_rsbtbl[i].toss); | |
52bda2b5 | 763 | dlm_free_rsb(rsb); |
e7fd4179 DT |
764 | } |
765 | } | |
766 | ||
c282af49 | 767 | vfree(ls->ls_rsbtbl); |
e7fd4179 | 768 | |
3881ac04 DT |
769 | while (!list_empty(&ls->ls_new_rsb)) { |
770 | rsb = list_first_entry(&ls->ls_new_rsb, struct dlm_rsb, | |
771 | res_hashchain); | |
772 | list_del(&rsb->res_hashchain); | |
773 | dlm_free_rsb(rsb); | |
774 | } | |
775 | ||
e7fd4179 DT |
776 | /* |
777 | * Free structures on any other lists | |
778 | */ | |
779 | ||
2896ee37 | 780 | dlm_purge_requestqueue(ls); |
e7fd4179 DT |
781 | kfree(ls->ls_recover_args); |
782 | dlm_clear_free_entries(ls); | |
783 | dlm_clear_members(ls); | |
784 | dlm_clear_members_gone(ls); | |
785 | kfree(ls->ls_node_array); | |
0f8e0d9a | 786 | log_debug(ls, "release_lockspace final free"); |
197b12d6 | 787 | kobject_put(&ls->ls_kobj); |
79d72b54 | 788 | /* The ls structure will be freed when the kobject is done with */ |
e7fd4179 | 789 | |
e7fd4179 DT |
790 | module_put(THIS_MODULE); |
791 | return 0; | |
792 | } | |
793 | ||
794 | /* | |
795 | * Called when a system has released all its locks and is not going to use the | |
796 | * lockspace any longer. We free everything we're managing for this lockspace. | |
797 | * Remaining nodes will go through the recovery process as if we'd died. The | |
798 | * lockspace must continue to function as usual, participating in recoveries, | |
799 | * until this returns. | |
800 | * | |
801 | * Force has 4 possible values: | |
802 | * 0 - don't destroy locksapce if it has any LKBs | |
803 | * 1 - destroy lockspace if it has remote LKBs but not if it has local LKBs | |
804 | * 2 - destroy lockspace regardless of LKBs | |
805 | * 3 - destroy lockspace as part of a forced shutdown | |
806 | */ | |
807 | ||
808 | int dlm_release_lockspace(void *lockspace, int force) | |
809 | { | |
810 | struct dlm_ls *ls; | |
0f8e0d9a | 811 | int error; |
e7fd4179 DT |
812 | |
813 | ls = dlm_find_lockspace_local(lockspace); | |
814 | if (!ls) | |
815 | return -EINVAL; | |
816 | dlm_put_lockspace(ls); | |
0f8e0d9a DT |
817 | |
818 | mutex_lock(&ls_lock); | |
819 | error = release_lockspace(ls, force); | |
820 | if (!error) | |
821 | ls_count--; | |
278afcbf | 822 | if (!ls_count) |
0f8e0d9a DT |
823 | threads_stop(); |
824 | mutex_unlock(&ls_lock); | |
825 | ||
826 | return error; | |
e7fd4179 DT |
827 | } |
828 | ||
dc68c7ed DT |
829 | void dlm_stop_lockspaces(void) |
830 | { | |
831 | struct dlm_ls *ls; | |
832 | ||
833 | restart: | |
834 | spin_lock(&lslist_lock); | |
835 | list_for_each_entry(ls, &lslist, ls_list) { | |
836 | if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) | |
837 | continue; | |
838 | spin_unlock(&lslist_lock); | |
839 | log_error(ls, "no userland control daemon, stopping lockspace"); | |
840 | dlm_ls_stop(ls); | |
841 | goto restart; | |
842 | } | |
843 | spin_unlock(&lslist_lock); | |
844 | } | |
845 |