Commit | Line | Data |
---|---|---|
e7fd4179 DT |
1 | /****************************************************************************** |
2 | ******************************************************************************* | |
3 | ** | |
4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
ef0c2bb0 | 5 | ** Copyright (C) 2004-2007 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" | |
18 | #include "ast.h" | |
19 | #include "dir.h" | |
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" |
e7fd4179 DT |
26 | |
27 | #ifdef CONFIG_DLM_DEBUG | |
28 | int dlm_create_debug_file(struct dlm_ls *ls); | |
29 | void dlm_delete_debug_file(struct dlm_ls *ls); | |
30 | #else | |
31 | static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; } | |
32 | static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } | |
33 | #endif | |
34 | ||
35 | static int ls_count; | |
90135925 | 36 | static struct mutex ls_lock; |
e7fd4179 DT |
37 | static struct list_head lslist; |
38 | static spinlock_t lslist_lock; | |
39 | static struct task_struct * scand_task; | |
40 | ||
41 | ||
42 | static ssize_t dlm_control_store(struct dlm_ls *ls, const char *buf, size_t len) | |
43 | { | |
44 | ssize_t ret = len; | |
45 | int n = simple_strtol(buf, NULL, 0); | |
46 | ||
e2de7f56 PC |
47 | ls = dlm_find_lockspace_local(ls->ls_local_handle); |
48 | if (!ls) | |
49 | return -EINVAL; | |
50 | ||
e7fd4179 DT |
51 | switch (n) { |
52 | case 0: | |
53 | dlm_ls_stop(ls); | |
54 | break; | |
55 | case 1: | |
56 | dlm_ls_start(ls); | |
57 | break; | |
58 | default: | |
59 | ret = -EINVAL; | |
60 | } | |
e2de7f56 | 61 | dlm_put_lockspace(ls); |
e7fd4179 DT |
62 | return ret; |
63 | } | |
64 | ||
65 | static ssize_t dlm_event_store(struct dlm_ls *ls, const char *buf, size_t len) | |
66 | { | |
67 | ls->ls_uevent_result = simple_strtol(buf, NULL, 0); | |
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 | { | |
80 | ls->ls_global_id = simple_strtoul(buf, NULL, 0); | |
81 | return len; | |
82 | } | |
83 | ||
c56b39cd DT |
84 | static ssize_t dlm_recover_status_show(struct dlm_ls *ls, char *buf) |
85 | { | |
86 | uint32_t status = dlm_recover_status(ls); | |
a1d144c7 | 87 | return snprintf(buf, PAGE_SIZE, "%x\n", status); |
c56b39cd DT |
88 | } |
89 | ||
faa0f267 DT |
90 | static ssize_t dlm_recover_nodeid_show(struct dlm_ls *ls, char *buf) |
91 | { | |
a1d144c7 | 92 | return snprintf(buf, PAGE_SIZE, "%d\n", ls->ls_recover_nodeid); |
faa0f267 DT |
93 | } |
94 | ||
e7fd4179 DT |
95 | struct dlm_attr { |
96 | struct attribute attr; | |
97 | ssize_t (*show)(struct dlm_ls *, char *); | |
98 | ssize_t (*store)(struct dlm_ls *, const char *, size_t); | |
99 | }; | |
100 | ||
101 | static struct dlm_attr dlm_attr_control = { | |
102 | .attr = {.name = "control", .mode = S_IWUSR}, | |
103 | .store = dlm_control_store | |
104 | }; | |
105 | ||
106 | static struct dlm_attr dlm_attr_event = { | |
107 | .attr = {.name = "event_done", .mode = S_IWUSR}, | |
108 | .store = dlm_event_store | |
109 | }; | |
110 | ||
111 | static struct dlm_attr dlm_attr_id = { | |
112 | .attr = {.name = "id", .mode = S_IRUGO | S_IWUSR}, | |
113 | .show = dlm_id_show, | |
114 | .store = dlm_id_store | |
115 | }; | |
116 | ||
c56b39cd DT |
117 | static struct dlm_attr dlm_attr_recover_status = { |
118 | .attr = {.name = "recover_status", .mode = S_IRUGO}, | |
119 | .show = dlm_recover_status_show | |
120 | }; | |
121 | ||
faa0f267 DT |
122 | static struct dlm_attr dlm_attr_recover_nodeid = { |
123 | .attr = {.name = "recover_nodeid", .mode = S_IRUGO}, | |
124 | .show = dlm_recover_nodeid_show | |
125 | }; | |
126 | ||
e7fd4179 DT |
127 | static struct attribute *dlm_attrs[] = { |
128 | &dlm_attr_control.attr, | |
129 | &dlm_attr_event.attr, | |
130 | &dlm_attr_id.attr, | |
c56b39cd | 131 | &dlm_attr_recover_status.attr, |
faa0f267 | 132 | &dlm_attr_recover_nodeid.attr, |
e7fd4179 DT |
133 | NULL, |
134 | }; | |
135 | ||
136 | static ssize_t dlm_attr_show(struct kobject *kobj, struct attribute *attr, | |
137 | char *buf) | |
138 | { | |
139 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
140 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
141 | return a->show ? a->show(ls, buf) : 0; | |
142 | } | |
143 | ||
144 | static ssize_t dlm_attr_store(struct kobject *kobj, struct attribute *attr, | |
145 | const char *buf, size_t len) | |
146 | { | |
147 | struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj); | |
148 | struct dlm_attr *a = container_of(attr, struct dlm_attr, attr); | |
149 | return a->store ? a->store(ls, buf, len) : len; | |
150 | } | |
151 | ||
ba542e3b PC |
152 | static void lockspace_kobj_release(struct kobject *k) |
153 | { | |
154 | struct dlm_ls *ls = container_of(k, struct dlm_ls, ls_kobj); | |
155 | kfree(ls); | |
156 | } | |
157 | ||
e7fd4179 DT |
158 | static struct sysfs_ops dlm_attr_ops = { |
159 | .show = dlm_attr_show, | |
160 | .store = dlm_attr_store, | |
161 | }; | |
162 | ||
163 | static struct kobj_type dlm_ktype = { | |
164 | .default_attrs = dlm_attrs, | |
165 | .sysfs_ops = &dlm_attr_ops, | |
ba542e3b | 166 | .release = lockspace_kobj_release, |
e7fd4179 DT |
167 | }; |
168 | ||
169 | static struct kset dlm_kset = { | |
e7fd4179 DT |
170 | .kobj = {.name = "dlm",}, |
171 | .ktype = &dlm_ktype, | |
172 | }; | |
173 | ||
174 | static int kobject_setup(struct dlm_ls *ls) | |
175 | { | |
176 | char lsname[DLM_LOCKSPACE_LEN]; | |
177 | int error; | |
178 | ||
179 | memset(lsname, 0, DLM_LOCKSPACE_LEN); | |
180 | snprintf(lsname, DLM_LOCKSPACE_LEN, "%s", ls->ls_name); | |
181 | ||
182 | error = kobject_set_name(&ls->ls_kobj, "%s", lsname); | |
183 | if (error) | |
184 | return error; | |
185 | ||
186 | ls->ls_kobj.kset = &dlm_kset; | |
187 | ls->ls_kobj.ktype = &dlm_ktype; | |
188 | return 0; | |
189 | } | |
190 | ||
191 | static int do_uevent(struct dlm_ls *ls, int in) | |
192 | { | |
193 | int error; | |
194 | ||
195 | if (in) | |
196 | kobject_uevent(&ls->ls_kobj, KOBJ_ONLINE); | |
197 | else | |
198 | kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE); | |
199 | ||
8b0e7b2c DT |
200 | log_debug(ls, "%s the lockspace group...", in ? "joining" : "leaving"); |
201 | ||
202 | /* dlm_controld will see the uevent, do the necessary group management | |
203 | and then write to sysfs to wake us */ | |
204 | ||
e7fd4179 DT |
205 | error = wait_event_interruptible(ls->ls_uevent_wait, |
206 | test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags)); | |
8b0e7b2c DT |
207 | |
208 | log_debug(ls, "group event done %d %d", error, ls->ls_uevent_result); | |
209 | ||
e7fd4179 DT |
210 | if (error) |
211 | goto out; | |
212 | ||
213 | error = ls->ls_uevent_result; | |
214 | out: | |
8b0e7b2c DT |
215 | if (error) |
216 | log_error(ls, "group %s failed %d %d", in ? "join" : "leave", | |
217 | error, ls->ls_uevent_result); | |
e7fd4179 DT |
218 | return error; |
219 | } | |
220 | ||
221 | ||
222 | int dlm_lockspace_init(void) | |
223 | { | |
224 | int error; | |
225 | ||
226 | ls_count = 0; | |
90135925 | 227 | mutex_init(&ls_lock); |
e7fd4179 DT |
228 | INIT_LIST_HEAD(&lslist); |
229 | spin_lock_init(&lslist_lock); | |
230 | ||
823bccfc | 231 | kobj_set_kset_s(&dlm_kset, kernel_subsys); |
e7fd4179 DT |
232 | error = kset_register(&dlm_kset); |
233 | if (error) | |
234 | printk("dlm_lockspace_init: cannot register kset %d\n", error); | |
235 | return error; | |
236 | } | |
237 | ||
238 | void dlm_lockspace_exit(void) | |
239 | { | |
240 | kset_unregister(&dlm_kset); | |
241 | } | |
242 | ||
243 | static int dlm_scand(void *data) | |
244 | { | |
245 | struct dlm_ls *ls; | |
246 | ||
247 | while (!kthread_should_stop()) { | |
85e86edf DT |
248 | list_for_each_entry(ls, &lslist, ls_list) { |
249 | if (dlm_lock_recovery_try(ls)) { | |
250 | dlm_scan_rsbs(ls); | |
3ae1acf9 | 251 | dlm_scan_timeout(ls); |
85e86edf DT |
252 | dlm_unlock_recovery(ls); |
253 | } | |
254 | } | |
68c817a1 | 255 | schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ); |
e7fd4179 DT |
256 | } |
257 | return 0; | |
258 | } | |
259 | ||
260 | static int dlm_scand_start(void) | |
261 | { | |
262 | struct task_struct *p; | |
263 | int error = 0; | |
264 | ||
265 | p = kthread_run(dlm_scand, NULL, "dlm_scand"); | |
266 | if (IS_ERR(p)) | |
267 | error = PTR_ERR(p); | |
268 | else | |
269 | scand_task = p; | |
270 | return error; | |
271 | } | |
272 | ||
273 | static void dlm_scand_stop(void) | |
274 | { | |
275 | kthread_stop(scand_task); | |
276 | } | |
277 | ||
278 | static struct dlm_ls *dlm_find_lockspace_name(char *name, int namelen) | |
279 | { | |
280 | struct dlm_ls *ls; | |
281 | ||
282 | spin_lock(&lslist_lock); | |
283 | ||
284 | list_for_each_entry(ls, &lslist, ls_list) { | |
285 | if (ls->ls_namelen == namelen && | |
286 | memcmp(ls->ls_name, name, namelen) == 0) | |
287 | goto out; | |
288 | } | |
289 | ls = NULL; | |
290 | out: | |
291 | spin_unlock(&lslist_lock); | |
292 | return ls; | |
293 | } | |
294 | ||
295 | struct dlm_ls *dlm_find_lockspace_global(uint32_t id) | |
296 | { | |
297 | struct dlm_ls *ls; | |
298 | ||
299 | spin_lock(&lslist_lock); | |
300 | ||
301 | list_for_each_entry(ls, &lslist, ls_list) { | |
302 | if (ls->ls_global_id == id) { | |
303 | ls->ls_count++; | |
304 | goto out; | |
305 | } | |
306 | } | |
307 | ls = NULL; | |
308 | out: | |
309 | spin_unlock(&lslist_lock); | |
310 | return ls; | |
311 | } | |
312 | ||
597d0cae | 313 | struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace) |
e7fd4179 | 314 | { |
597d0cae | 315 | struct dlm_ls *ls; |
e7fd4179 DT |
316 | |
317 | spin_lock(&lslist_lock); | |
597d0cae DT |
318 | list_for_each_entry(ls, &lslist, ls_list) { |
319 | if (ls->ls_local_handle == lockspace) { | |
320 | ls->ls_count++; | |
321 | goto out; | |
322 | } | |
323 | } | |
324 | ls = NULL; | |
325 | out: | |
326 | spin_unlock(&lslist_lock); | |
327 | return ls; | |
328 | } | |
329 | ||
330 | struct dlm_ls *dlm_find_lockspace_device(int minor) | |
331 | { | |
332 | struct dlm_ls *ls; | |
333 | ||
334 | spin_lock(&lslist_lock); | |
335 | list_for_each_entry(ls, &lslist, ls_list) { | |
336 | if (ls->ls_device.minor == minor) { | |
337 | ls->ls_count++; | |
338 | goto out; | |
339 | } | |
340 | } | |
341 | ls = NULL; | |
342 | out: | |
e7fd4179 DT |
343 | spin_unlock(&lslist_lock); |
344 | return ls; | |
345 | } | |
346 | ||
347 | void dlm_put_lockspace(struct dlm_ls *ls) | |
348 | { | |
349 | spin_lock(&lslist_lock); | |
350 | ls->ls_count--; | |
351 | spin_unlock(&lslist_lock); | |
352 | } | |
353 | ||
354 | static void remove_lockspace(struct dlm_ls *ls) | |
355 | { | |
356 | for (;;) { | |
357 | spin_lock(&lslist_lock); | |
358 | if (ls->ls_count == 0) { | |
359 | list_del(&ls->ls_list); | |
360 | spin_unlock(&lslist_lock); | |
361 | return; | |
362 | } | |
363 | spin_unlock(&lslist_lock); | |
364 | ssleep(1); | |
365 | } | |
366 | } | |
367 | ||
368 | static int threads_start(void) | |
369 | { | |
370 | int error; | |
371 | ||
372 | /* Thread which process lock requests for all lockspace's */ | |
373 | error = dlm_astd_start(); | |
374 | if (error) { | |
375 | log_print("cannot start dlm_astd thread %d", error); | |
376 | goto fail; | |
377 | } | |
378 | ||
379 | error = dlm_scand_start(); | |
380 | if (error) { | |
381 | log_print("cannot start dlm_scand thread %d", error); | |
382 | goto astd_fail; | |
383 | } | |
384 | ||
385 | /* Thread for sending/receiving messages for all lockspace's */ | |
386 | error = dlm_lowcomms_start(); | |
387 | if (error) { | |
388 | log_print("cannot start dlm lowcomms %d", error); | |
389 | goto scand_fail; | |
390 | } | |
391 | ||
392 | return 0; | |
393 | ||
394 | scand_fail: | |
395 | dlm_scand_stop(); | |
396 | astd_fail: | |
397 | dlm_astd_stop(); | |
398 | fail: | |
399 | return error; | |
400 | } | |
401 | ||
402 | static void threads_stop(void) | |
403 | { | |
404 | dlm_scand_stop(); | |
405 | dlm_lowcomms_stop(); | |
406 | dlm_astd_stop(); | |
407 | } | |
408 | ||
409 | static int new_lockspace(char *name, int namelen, void **lockspace, | |
410 | uint32_t flags, int lvblen) | |
411 | { | |
412 | struct dlm_ls *ls; | |
413 | int i, size, error = -ENOMEM; | |
79d72b54 | 414 | int do_unreg = 0; |
e7fd4179 DT |
415 | |
416 | if (namelen > DLM_LOCKSPACE_LEN) | |
417 | return -EINVAL; | |
418 | ||
419 | if (!lvblen || (lvblen % 8)) | |
420 | return -EINVAL; | |
421 | ||
422 | if (!try_module_get(THIS_MODULE)) | |
423 | return -EINVAL; | |
424 | ||
425 | ls = dlm_find_lockspace_name(name, namelen); | |
426 | if (ls) { | |
427 | *lockspace = ls; | |
428 | module_put(THIS_MODULE); | |
429 | return -EEXIST; | |
430 | } | |
431 | ||
90135925 | 432 | ls = kzalloc(sizeof(struct dlm_ls) + namelen, GFP_KERNEL); |
e7fd4179 DT |
433 | if (!ls) |
434 | goto out; | |
e7fd4179 DT |
435 | memcpy(ls->ls_name, name, namelen); |
436 | ls->ls_namelen = namelen; | |
e7fd4179 DT |
437 | ls->ls_lvblen = lvblen; |
438 | ls->ls_count = 0; | |
439 | ls->ls_flags = 0; | |
440 | ||
3ae1acf9 DT |
441 | /* ls_exflags are forced to match among nodes, and we don't |
442 | need to require all nodes to have TIMEWARN active */ | |
443 | if (flags & DLM_LSFL_TIMEWARN) | |
444 | set_bit(LSFL_TIMEWARN, &ls->ls_flags); | |
445 | ls->ls_exflags = (flags & ~DLM_LSFL_TIMEWARN); | |
446 | ||
44f487a5 PC |
447 | if (flags & DLM_LSFL_FS) |
448 | ls->ls_allocation = GFP_NOFS; | |
449 | else | |
450 | ls->ls_allocation = GFP_KERNEL; | |
451 | ||
68c817a1 | 452 | size = dlm_config.ci_rsbtbl_size; |
e7fd4179 DT |
453 | ls->ls_rsbtbl_size = size; |
454 | ||
455 | ls->ls_rsbtbl = kmalloc(sizeof(struct dlm_rsbtable) * size, GFP_KERNEL); | |
456 | if (!ls->ls_rsbtbl) | |
457 | goto out_lsfree; | |
458 | for (i = 0; i < size; i++) { | |
459 | INIT_LIST_HEAD(&ls->ls_rsbtbl[i].list); | |
460 | INIT_LIST_HEAD(&ls->ls_rsbtbl[i].toss); | |
461 | rwlock_init(&ls->ls_rsbtbl[i].lock); | |
462 | } | |
463 | ||
68c817a1 | 464 | size = dlm_config.ci_lkbtbl_size; |
e7fd4179 DT |
465 | ls->ls_lkbtbl_size = size; |
466 | ||
467 | ls->ls_lkbtbl = kmalloc(sizeof(struct dlm_lkbtable) * size, GFP_KERNEL); | |
468 | if (!ls->ls_lkbtbl) | |
469 | goto out_rsbfree; | |
470 | for (i = 0; i < size; i++) { | |
471 | INIT_LIST_HEAD(&ls->ls_lkbtbl[i].list); | |
472 | rwlock_init(&ls->ls_lkbtbl[i].lock); | |
473 | ls->ls_lkbtbl[i].counter = 1; | |
474 | } | |
475 | ||
68c817a1 | 476 | size = dlm_config.ci_dirtbl_size; |
e7fd4179 DT |
477 | ls->ls_dirtbl_size = size; |
478 | ||
479 | ls->ls_dirtbl = kmalloc(sizeof(struct dlm_dirtable) * size, GFP_KERNEL); | |
480 | if (!ls->ls_dirtbl) | |
481 | goto out_lkbfree; | |
482 | for (i = 0; i < size; i++) { | |
483 | INIT_LIST_HEAD(&ls->ls_dirtbl[i].list); | |
484 | rwlock_init(&ls->ls_dirtbl[i].lock); | |
485 | } | |
486 | ||
487 | INIT_LIST_HEAD(&ls->ls_waiters); | |
90135925 | 488 | mutex_init(&ls->ls_waiters_mutex); |
ef0c2bb0 DT |
489 | INIT_LIST_HEAD(&ls->ls_orphans); |
490 | mutex_init(&ls->ls_orphans_mutex); | |
3ae1acf9 DT |
491 | INIT_LIST_HEAD(&ls->ls_timeout); |
492 | mutex_init(&ls->ls_timeout_mutex); | |
e7fd4179 DT |
493 | |
494 | INIT_LIST_HEAD(&ls->ls_nodes); | |
495 | INIT_LIST_HEAD(&ls->ls_nodes_gone); | |
496 | ls->ls_num_nodes = 0; | |
497 | ls->ls_low_nodeid = 0; | |
498 | ls->ls_total_weight = 0; | |
499 | ls->ls_node_array = NULL; | |
500 | ||
501 | memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb)); | |
502 | ls->ls_stub_rsb.res_ls = ls; | |
503 | ||
5de6319b DT |
504 | ls->ls_debug_rsb_dentry = NULL; |
505 | ls->ls_debug_waiters_dentry = NULL; | |
e7fd4179 DT |
506 | |
507 | init_waitqueue_head(&ls->ls_uevent_wait); | |
508 | ls->ls_uevent_result = 0; | |
8b0e7b2c DT |
509 | init_completion(&ls->ls_members_done); |
510 | ls->ls_members_result = -1; | |
e7fd4179 DT |
511 | |
512 | ls->ls_recoverd_task = NULL; | |
90135925 | 513 | mutex_init(&ls->ls_recoverd_active); |
e7fd4179 | 514 | spin_lock_init(&ls->ls_recover_lock); |
98f176fb DT |
515 | spin_lock_init(&ls->ls_rcom_spin); |
516 | get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t)); | |
e7fd4179 DT |
517 | ls->ls_recover_status = 0; |
518 | ls->ls_recover_seq = 0; | |
519 | ls->ls_recover_args = NULL; | |
520 | init_rwsem(&ls->ls_in_recovery); | |
521 | INIT_LIST_HEAD(&ls->ls_requestqueue); | |
90135925 | 522 | mutex_init(&ls->ls_requestqueue_mutex); |
597d0cae | 523 | mutex_init(&ls->ls_clear_proc_locks); |
e7fd4179 | 524 | |
68c817a1 | 525 | ls->ls_recover_buf = kmalloc(dlm_config.ci_buffer_size, GFP_KERNEL); |
e7fd4179 DT |
526 | if (!ls->ls_recover_buf) |
527 | goto out_dirfree; | |
528 | ||
529 | INIT_LIST_HEAD(&ls->ls_recover_list); | |
530 | spin_lock_init(&ls->ls_recover_list_lock); | |
531 | ls->ls_recover_list_count = 0; | |
597d0cae | 532 | ls->ls_local_handle = ls; |
e7fd4179 DT |
533 | init_waitqueue_head(&ls->ls_wait_general); |
534 | INIT_LIST_HEAD(&ls->ls_root_list); | |
535 | init_rwsem(&ls->ls_root_sem); | |
536 | ||
537 | down_write(&ls->ls_in_recovery); | |
538 | ||
5f88f1ea DT |
539 | spin_lock(&lslist_lock); |
540 | list_add(&ls->ls_list, &lslist); | |
541 | spin_unlock(&lslist_lock); | |
542 | ||
543 | /* needs to find ls in lslist */ | |
e7fd4179 DT |
544 | error = dlm_recoverd_start(ls); |
545 | if (error) { | |
546 | log_error(ls, "can't start dlm_recoverd %d", error); | |
79d72b54 | 547 | goto out_delist; |
e7fd4179 DT |
548 | } |
549 | ||
e7fd4179 DT |
550 | error = kobject_setup(ls); |
551 | if (error) | |
79d72b54 | 552 | goto out_stop; |
e7fd4179 DT |
553 | |
554 | error = kobject_register(&ls->ls_kobj); | |
555 | if (error) | |
79d72b54 DT |
556 | goto out_stop; |
557 | ||
558 | /* let kobject handle freeing of ls if there's an error */ | |
559 | do_unreg = 1; | |
e7fd4179 | 560 | |
8b0e7b2c DT |
561 | /* This uevent triggers dlm_controld in userspace to add us to the |
562 | group of nodes that are members of this lockspace (managed by the | |
563 | cluster infrastructure.) Once it's done that, it tells us who the | |
564 | current lockspace members are (via configfs) and then tells the | |
565 | lockspace to start running (via sysfs) in dlm_ls_start(). */ | |
566 | ||
e7fd4179 DT |
567 | error = do_uevent(ls, 1); |
568 | if (error) | |
79d72b54 DT |
569 | goto out_stop; |
570 | ||
8b0e7b2c DT |
571 | wait_for_completion(&ls->ls_members_done); |
572 | error = ls->ls_members_result; | |
573 | if (error) | |
574 | goto out_members; | |
575 | ||
79d72b54 DT |
576 | dlm_create_debug_file(ls); |
577 | ||
578 | log_debug(ls, "join complete"); | |
e7fd4179 DT |
579 | |
580 | *lockspace = ls; | |
581 | return 0; | |
582 | ||
8b0e7b2c DT |
583 | out_members: |
584 | do_uevent(ls, 0); | |
585 | dlm_clear_members(ls); | |
586 | kfree(ls->ls_node_array); | |
79d72b54 | 587 | out_stop: |
5f88f1ea | 588 | dlm_recoverd_stop(ls); |
79d72b54 | 589 | out_delist: |
e7fd4179 DT |
590 | spin_lock(&lslist_lock); |
591 | list_del(&ls->ls_list); | |
592 | spin_unlock(&lslist_lock); | |
e7fd4179 DT |
593 | kfree(ls->ls_recover_buf); |
594 | out_dirfree: | |
595 | kfree(ls->ls_dirtbl); | |
596 | out_lkbfree: | |
597 | kfree(ls->ls_lkbtbl); | |
598 | out_rsbfree: | |
599 | kfree(ls->ls_rsbtbl); | |
600 | out_lsfree: | |
79d72b54 DT |
601 | if (do_unreg) |
602 | kobject_unregister(&ls->ls_kobj); | |
603 | else | |
604 | kfree(ls); | |
e7fd4179 DT |
605 | out: |
606 | module_put(THIS_MODULE); | |
607 | return error; | |
608 | } | |
609 | ||
610 | int dlm_new_lockspace(char *name, int namelen, void **lockspace, | |
611 | uint32_t flags, int lvblen) | |
612 | { | |
613 | int error = 0; | |
614 | ||
90135925 | 615 | mutex_lock(&ls_lock); |
e7fd4179 DT |
616 | if (!ls_count) |
617 | error = threads_start(); | |
618 | if (error) | |
619 | goto out; | |
620 | ||
621 | error = new_lockspace(name, namelen, lockspace, flags, lvblen); | |
622 | if (!error) | |
623 | ls_count++; | |
8b0e7b2c DT |
624 | else if (!ls_count) |
625 | threads_stop(); | |
e7fd4179 | 626 | out: |
90135925 | 627 | mutex_unlock(&ls_lock); |
e7fd4179 DT |
628 | return error; |
629 | } | |
630 | ||
631 | /* Return 1 if the lockspace still has active remote locks, | |
632 | * 2 if the lockspace still has active local locks. | |
633 | */ | |
634 | static int lockspace_busy(struct dlm_ls *ls) | |
635 | { | |
636 | int i, lkb_found = 0; | |
637 | struct dlm_lkb *lkb; | |
638 | ||
639 | /* NOTE: We check the lockidtbl here rather than the resource table. | |
640 | This is because there may be LKBs queued as ASTs that have been | |
641 | unlinked from their RSBs and are pending deletion once the AST has | |
642 | been delivered */ | |
643 | ||
644 | for (i = 0; i < ls->ls_lkbtbl_size; i++) { | |
645 | read_lock(&ls->ls_lkbtbl[i].lock); | |
646 | if (!list_empty(&ls->ls_lkbtbl[i].list)) { | |
647 | lkb_found = 1; | |
648 | list_for_each_entry(lkb, &ls->ls_lkbtbl[i].list, | |
649 | lkb_idtbl_list) { | |
650 | if (!lkb->lkb_nodeid) { | |
651 | read_unlock(&ls->ls_lkbtbl[i].lock); | |
652 | return 2; | |
653 | } | |
654 | } | |
655 | } | |
656 | read_unlock(&ls->ls_lkbtbl[i].lock); | |
657 | } | |
658 | return lkb_found; | |
659 | } | |
660 | ||
661 | static int release_lockspace(struct dlm_ls *ls, int force) | |
662 | { | |
663 | struct dlm_lkb *lkb; | |
664 | struct dlm_rsb *rsb; | |
665 | struct list_head *head; | |
666 | int i; | |
667 | int busy = lockspace_busy(ls); | |
668 | ||
669 | if (busy > force) | |
670 | return -EBUSY; | |
671 | ||
672 | if (force < 3) | |
673 | do_uevent(ls, 0); | |
674 | ||
675 | dlm_recoverd_stop(ls); | |
676 | ||
677 | remove_lockspace(ls); | |
678 | ||
679 | dlm_delete_debug_file(ls); | |
680 | ||
681 | dlm_astd_suspend(); | |
682 | ||
683 | kfree(ls->ls_recover_buf); | |
684 | ||
685 | /* | |
686 | * Free direntry structs. | |
687 | */ | |
688 | ||
689 | dlm_dir_clear(ls); | |
690 | kfree(ls->ls_dirtbl); | |
691 | ||
692 | /* | |
693 | * Free all lkb's on lkbtbl[] lists. | |
694 | */ | |
695 | ||
696 | for (i = 0; i < ls->ls_lkbtbl_size; i++) { | |
697 | head = &ls->ls_lkbtbl[i].list; | |
698 | while (!list_empty(head)) { | |
699 | lkb = list_entry(head->next, struct dlm_lkb, | |
700 | lkb_idtbl_list); | |
701 | ||
702 | list_del(&lkb->lkb_idtbl_list); | |
703 | ||
704 | dlm_del_ast(lkb); | |
705 | ||
706 | if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY) | |
707 | free_lvb(lkb->lkb_lvbptr); | |
708 | ||
709 | free_lkb(lkb); | |
710 | } | |
711 | } | |
712 | dlm_astd_resume(); | |
713 | ||
714 | kfree(ls->ls_lkbtbl); | |
715 | ||
716 | /* | |
717 | * Free all rsb's on rsbtbl[] lists | |
718 | */ | |
719 | ||
720 | for (i = 0; i < ls->ls_rsbtbl_size; i++) { | |
721 | head = &ls->ls_rsbtbl[i].list; | |
722 | while (!list_empty(head)) { | |
723 | rsb = list_entry(head->next, struct dlm_rsb, | |
724 | res_hashchain); | |
725 | ||
726 | list_del(&rsb->res_hashchain); | |
727 | free_rsb(rsb); | |
728 | } | |
729 | ||
730 | head = &ls->ls_rsbtbl[i].toss; | |
731 | while (!list_empty(head)) { | |
732 | rsb = list_entry(head->next, struct dlm_rsb, | |
733 | res_hashchain); | |
734 | list_del(&rsb->res_hashchain); | |
735 | free_rsb(rsb); | |
736 | } | |
737 | } | |
738 | ||
739 | kfree(ls->ls_rsbtbl); | |
740 | ||
741 | /* | |
742 | * Free structures on any other lists | |
743 | */ | |
744 | ||
2896ee37 | 745 | dlm_purge_requestqueue(ls); |
e7fd4179 DT |
746 | kfree(ls->ls_recover_args); |
747 | dlm_clear_free_entries(ls); | |
748 | dlm_clear_members(ls); | |
749 | dlm_clear_members_gone(ls); | |
750 | kfree(ls->ls_node_array); | |
751 | kobject_unregister(&ls->ls_kobj); | |
79d72b54 | 752 | /* The ls structure will be freed when the kobject is done with */ |
e7fd4179 | 753 | |
90135925 | 754 | mutex_lock(&ls_lock); |
e7fd4179 DT |
755 | ls_count--; |
756 | if (!ls_count) | |
757 | threads_stop(); | |
90135925 | 758 | mutex_unlock(&ls_lock); |
e7fd4179 DT |
759 | |
760 | module_put(THIS_MODULE); | |
761 | return 0; | |
762 | } | |
763 | ||
764 | /* | |
765 | * Called when a system has released all its locks and is not going to use the | |
766 | * lockspace any longer. We free everything we're managing for this lockspace. | |
767 | * Remaining nodes will go through the recovery process as if we'd died. The | |
768 | * lockspace must continue to function as usual, participating in recoveries, | |
769 | * until this returns. | |
770 | * | |
771 | * Force has 4 possible values: | |
772 | * 0 - don't destroy locksapce if it has any LKBs | |
773 | * 1 - destroy lockspace if it has remote LKBs but not if it has local LKBs | |
774 | * 2 - destroy lockspace regardless of LKBs | |
775 | * 3 - destroy lockspace as part of a forced shutdown | |
776 | */ | |
777 | ||
778 | int dlm_release_lockspace(void *lockspace, int force) | |
779 | { | |
780 | struct dlm_ls *ls; | |
781 | ||
782 | ls = dlm_find_lockspace_local(lockspace); | |
783 | if (!ls) | |
784 | return -EINVAL; | |
785 | dlm_put_lockspace(ls); | |
786 | return release_lockspace(ls, force); | |
787 | } | |
788 |