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" | |
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" |
0f8e0d9a | 26 | #include "user.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 | ||
e7fd4179 DT |
151 | static struct sysfs_ops dlm_attr_ops = { |
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 | ||
194 | ||
30727174 | 195 | int __init dlm_lockspace_init(void) |
e7fd4179 | 196 | { |
e7fd4179 | 197 | ls_count = 0; |
90135925 | 198 | mutex_init(&ls_lock); |
e7fd4179 DT |
199 | INIT_LIST_HEAD(&lslist); |
200 | spin_lock_init(&lslist_lock); | |
201 | ||
0ff21e46 | 202 | dlm_kset = kset_create_and_add("dlm", NULL, kernel_kobj); |
d405936b | 203 | if (!dlm_kset) { |
8e24eea7 | 204 | printk(KERN_WARNING "%s: can not create kset\n", __func__); |
d405936b GKH |
205 | return -ENOMEM; |
206 | } | |
207 | return 0; | |
e7fd4179 DT |
208 | } |
209 | ||
210 | void dlm_lockspace_exit(void) | |
211 | { | |
d405936b | 212 | kset_unregister(dlm_kset); |
e7fd4179 DT |
213 | } |
214 | ||
c1dcf65f DT |
215 | static struct dlm_ls *find_ls_to_scan(void) |
216 | { | |
217 | struct dlm_ls *ls; | |
218 | ||
219 | spin_lock(&lslist_lock); | |
220 | list_for_each_entry(ls, &lslist, ls_list) { | |
221 | if (time_after_eq(jiffies, ls->ls_scan_time + | |
222 | dlm_config.ci_scan_secs * HZ)) { | |
223 | spin_unlock(&lslist_lock); | |
224 | return ls; | |
225 | } | |
226 | } | |
227 | spin_unlock(&lslist_lock); | |
228 | return NULL; | |
229 | } | |
230 | ||
e7fd4179 DT |
231 | static int dlm_scand(void *data) |
232 | { | |
233 | struct dlm_ls *ls; | |
c1dcf65f | 234 | int timeout_jiffies = dlm_config.ci_scan_secs * HZ; |
e7fd4179 DT |
235 | |
236 | while (!kthread_should_stop()) { | |
c1dcf65f DT |
237 | ls = find_ls_to_scan(); |
238 | if (ls) { | |
85e86edf | 239 | if (dlm_lock_recovery_try(ls)) { |
c1dcf65f | 240 | ls->ls_scan_time = jiffies; |
85e86edf | 241 | dlm_scan_rsbs(ls); |
3ae1acf9 | 242 | dlm_scan_timeout(ls); |
85e86edf | 243 | dlm_unlock_recovery(ls); |
c1dcf65f DT |
244 | } else { |
245 | ls->ls_scan_time += HZ; | |
85e86edf | 246 | } |
c1dcf65f DT |
247 | } else { |
248 | schedule_timeout_interruptible(timeout_jiffies); | |
85e86edf | 249 | } |
e7fd4179 DT |
250 | } |
251 | return 0; | |
252 | } | |
253 | ||
254 | static int dlm_scand_start(void) | |
255 | { | |
256 | struct task_struct *p; | |
257 | int error = 0; | |
258 | ||
259 | p = kthread_run(dlm_scand, NULL, "dlm_scand"); | |
260 | if (IS_ERR(p)) | |
261 | error = PTR_ERR(p); | |
262 | else | |
263 | scand_task = p; | |
264 | return error; | |
265 | } | |
266 | ||
267 | static void dlm_scand_stop(void) | |
268 | { | |
269 | kthread_stop(scand_task); | |
270 | } | |
271 | ||
e7fd4179 DT |
272 | struct dlm_ls *dlm_find_lockspace_global(uint32_t id) |
273 | { | |
274 | struct dlm_ls *ls; | |
275 | ||
276 | spin_lock(&lslist_lock); | |
277 | ||
278 | list_for_each_entry(ls, &lslist, ls_list) { | |
279 | if (ls->ls_global_id == id) { | |
280 | ls->ls_count++; | |
281 | goto out; | |
282 | } | |
283 | } | |
284 | ls = NULL; | |
285 | out: | |
286 | spin_unlock(&lslist_lock); | |
287 | return ls; | |
288 | } | |
289 | ||
597d0cae | 290 | struct dlm_ls *dlm_find_lockspace_local(dlm_lockspace_t *lockspace) |
e7fd4179 | 291 | { |
597d0cae | 292 | struct dlm_ls *ls; |
e7fd4179 DT |
293 | |
294 | spin_lock(&lslist_lock); | |
597d0cae DT |
295 | list_for_each_entry(ls, &lslist, ls_list) { |
296 | if (ls->ls_local_handle == lockspace) { | |
297 | ls->ls_count++; | |
298 | goto out; | |
299 | } | |
300 | } | |
301 | ls = NULL; | |
302 | out: | |
303 | spin_unlock(&lslist_lock); | |
304 | return ls; | |
305 | } | |
306 | ||
307 | struct dlm_ls *dlm_find_lockspace_device(int minor) | |
308 | { | |
309 | struct dlm_ls *ls; | |
310 | ||
311 | spin_lock(&lslist_lock); | |
312 | list_for_each_entry(ls, &lslist, ls_list) { | |
313 | if (ls->ls_device.minor == minor) { | |
314 | ls->ls_count++; | |
315 | goto out; | |
316 | } | |
317 | } | |
318 | ls = NULL; | |
319 | out: | |
e7fd4179 DT |
320 | spin_unlock(&lslist_lock); |
321 | return ls; | |
322 | } | |
323 | ||
324 | void dlm_put_lockspace(struct dlm_ls *ls) | |
325 | { | |
326 | spin_lock(&lslist_lock); | |
327 | ls->ls_count--; | |
328 | spin_unlock(&lslist_lock); | |
329 | } | |
330 | ||
331 | static void remove_lockspace(struct dlm_ls *ls) | |
332 | { | |
333 | for (;;) { | |
334 | spin_lock(&lslist_lock); | |
335 | if (ls->ls_count == 0) { | |
0f8e0d9a | 336 | WARN_ON(ls->ls_create_count != 0); |
e7fd4179 DT |
337 | list_del(&ls->ls_list); |
338 | spin_unlock(&lslist_lock); | |
339 | return; | |
340 | } | |
341 | spin_unlock(&lslist_lock); | |
342 | ssleep(1); | |
343 | } | |
344 | } | |
345 | ||
346 | static int threads_start(void) | |
347 | { | |
348 | int error; | |
349 | ||
350 | /* Thread which process lock requests for all lockspace's */ | |
351 | error = dlm_astd_start(); | |
352 | if (error) { | |
353 | log_print("cannot start dlm_astd thread %d", error); | |
354 | goto fail; | |
355 | } | |
356 | ||
357 | error = dlm_scand_start(); | |
358 | if (error) { | |
359 | log_print("cannot start dlm_scand thread %d", error); | |
360 | goto astd_fail; | |
361 | } | |
362 | ||
363 | /* Thread for sending/receiving messages for all lockspace's */ | |
364 | error = dlm_lowcomms_start(); | |
365 | if (error) { | |
366 | log_print("cannot start dlm lowcomms %d", error); | |
367 | goto scand_fail; | |
368 | } | |
369 | ||
370 | return 0; | |
371 | ||
372 | scand_fail: | |
373 | dlm_scand_stop(); | |
374 | astd_fail: | |
375 | dlm_astd_stop(); | |
376 | fail: | |
377 | return error; | |
378 | } | |
379 | ||
380 | static void threads_stop(void) | |
381 | { | |
382 | dlm_scand_stop(); | |
383 | dlm_lowcomms_stop(); | |
384 | dlm_astd_stop(); | |
385 | } | |
386 | ||
08ce4c91 | 387 | static int new_lockspace(const char *name, int namelen, void **lockspace, |
e7fd4179 DT |
388 | uint32_t flags, int lvblen) |
389 | { | |
390 | struct dlm_ls *ls; | |
0f8e0d9a | 391 | int i, size, error; |
79d72b54 | 392 | int do_unreg = 0; |
e7fd4179 DT |
393 | |
394 | if (namelen > DLM_LOCKSPACE_LEN) | |
395 | return -EINVAL; | |
396 | ||
397 | if (!lvblen || (lvblen % 8)) | |
398 | return -EINVAL; | |
399 | ||
400 | if (!try_module_get(THIS_MODULE)) | |
401 | return -EINVAL; | |
402 | ||
dc68c7ed DT |
403 | if (!dlm_user_daemon_available()) { |
404 | module_put(THIS_MODULE); | |
405 | return -EUNATCH; | |
406 | } | |
407 | ||
0f8e0d9a DT |
408 | error = 0; |
409 | ||
410 | spin_lock(&lslist_lock); | |
411 | list_for_each_entry(ls, &lslist, ls_list) { | |
412 | WARN_ON(ls->ls_create_count <= 0); | |
413 | if (ls->ls_namelen != namelen) | |
414 | continue; | |
415 | if (memcmp(ls->ls_name, name, namelen)) | |
416 | continue; | |
417 | if (flags & DLM_LSFL_NEWEXCL) { | |
418 | error = -EEXIST; | |
419 | break; | |
420 | } | |
421 | ls->ls_create_count++; | |
8511a272 DT |
422 | *lockspace = ls; |
423 | error = 1; | |
0f8e0d9a | 424 | break; |
e7fd4179 | 425 | } |
0f8e0d9a DT |
426 | spin_unlock(&lslist_lock); |
427 | ||
0f8e0d9a | 428 | if (error) |
8511a272 | 429 | goto out; |
0f8e0d9a DT |
430 | |
431 | error = -ENOMEM; | |
e7fd4179 | 432 | |
573c24c4 | 433 | ls = kzalloc(sizeof(struct dlm_ls) + namelen, GFP_NOFS); |
e7fd4179 DT |
434 | if (!ls) |
435 | goto out; | |
e7fd4179 DT |
436 | memcpy(ls->ls_name, name, namelen); |
437 | ls->ls_namelen = namelen; | |
e7fd4179 DT |
438 | ls->ls_lvblen = lvblen; |
439 | ls->ls_count = 0; | |
440 | ls->ls_flags = 0; | |
c1dcf65f | 441 | ls->ls_scan_time = jiffies; |
e7fd4179 | 442 | |
3ae1acf9 DT |
443 | if (flags & DLM_LSFL_TIMEWARN) |
444 | set_bit(LSFL_TIMEWARN, &ls->ls_flags); | |
3ae1acf9 | 445 | |
fad59c13 | 446 | /* ls_exflags are forced to match among nodes, and we don't |
0f8e0d9a DT |
447 | need to require all nodes to have some flags set */ |
448 | ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS | | |
449 | DLM_LSFL_NEWEXCL)); | |
fad59c13 | 450 | |
68c817a1 | 451 | size = dlm_config.ci_rsbtbl_size; |
e7fd4179 DT |
452 | ls->ls_rsbtbl_size = size; |
453 | ||
573c24c4 | 454 | ls->ls_rsbtbl = kmalloc(sizeof(struct dlm_rsbtable) * size, GFP_NOFS); |
e7fd4179 DT |
455 | if (!ls->ls_rsbtbl) |
456 | goto out_lsfree; | |
457 | for (i = 0; i < size; i++) { | |
458 | INIT_LIST_HEAD(&ls->ls_rsbtbl[i].list); | |
459 | INIT_LIST_HEAD(&ls->ls_rsbtbl[i].toss); | |
c7be761a | 460 | spin_lock_init(&ls->ls_rsbtbl[i].lock); |
e7fd4179 DT |
461 | } |
462 | ||
68c817a1 | 463 | size = dlm_config.ci_lkbtbl_size; |
e7fd4179 DT |
464 | ls->ls_lkbtbl_size = size; |
465 | ||
573c24c4 | 466 | ls->ls_lkbtbl = kmalloc(sizeof(struct dlm_lkbtable) * size, GFP_NOFS); |
e7fd4179 DT |
467 | if (!ls->ls_lkbtbl) |
468 | goto out_rsbfree; | |
469 | for (i = 0; i < size; i++) { | |
470 | INIT_LIST_HEAD(&ls->ls_lkbtbl[i].list); | |
471 | rwlock_init(&ls->ls_lkbtbl[i].lock); | |
472 | ls->ls_lkbtbl[i].counter = 1; | |
473 | } | |
474 | ||
68c817a1 | 475 | size = dlm_config.ci_dirtbl_size; |
e7fd4179 DT |
476 | ls->ls_dirtbl_size = size; |
477 | ||
573c24c4 | 478 | ls->ls_dirtbl = kmalloc(sizeof(struct dlm_dirtable) * size, GFP_NOFS); |
e7fd4179 DT |
479 | if (!ls->ls_dirtbl) |
480 | goto out_lkbfree; | |
481 | for (i = 0; i < size; i++) { | |
482 | INIT_LIST_HEAD(&ls->ls_dirtbl[i].list); | |
305a47b1 | 483 | spin_lock_init(&ls->ls_dirtbl[i].lock); |
e7fd4179 DT |
484 | } |
485 | ||
486 | INIT_LIST_HEAD(&ls->ls_waiters); | |
90135925 | 487 | mutex_init(&ls->ls_waiters_mutex); |
ef0c2bb0 DT |
488 | INIT_LIST_HEAD(&ls->ls_orphans); |
489 | mutex_init(&ls->ls_orphans_mutex); | |
3ae1acf9 DT |
490 | INIT_LIST_HEAD(&ls->ls_timeout); |
491 | mutex_init(&ls->ls_timeout_mutex); | |
e7fd4179 DT |
492 | |
493 | INIT_LIST_HEAD(&ls->ls_nodes); | |
494 | INIT_LIST_HEAD(&ls->ls_nodes_gone); | |
495 | ls->ls_num_nodes = 0; | |
496 | ls->ls_low_nodeid = 0; | |
497 | ls->ls_total_weight = 0; | |
498 | ls->ls_node_array = NULL; | |
499 | ||
500 | memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb)); | |
501 | ls->ls_stub_rsb.res_ls = ls; | |
502 | ||
5de6319b DT |
503 | ls->ls_debug_rsb_dentry = NULL; |
504 | ls->ls_debug_waiters_dentry = NULL; | |
e7fd4179 DT |
505 | |
506 | init_waitqueue_head(&ls->ls_uevent_wait); | |
507 | ls->ls_uevent_result = 0; | |
8b0e7b2c DT |
508 | init_completion(&ls->ls_members_done); |
509 | ls->ls_members_result = -1; | |
e7fd4179 DT |
510 | |
511 | ls->ls_recoverd_task = NULL; | |
90135925 | 512 | mutex_init(&ls->ls_recoverd_active); |
e7fd4179 | 513 | spin_lock_init(&ls->ls_recover_lock); |
98f176fb DT |
514 | spin_lock_init(&ls->ls_rcom_spin); |
515 | get_random_bytes(&ls->ls_rcom_seq, sizeof(uint64_t)); | |
e7fd4179 DT |
516 | ls->ls_recover_status = 0; |
517 | ls->ls_recover_seq = 0; | |
518 | ls->ls_recover_args = NULL; | |
519 | init_rwsem(&ls->ls_in_recovery); | |
c36258b5 | 520 | init_rwsem(&ls->ls_recv_active); |
e7fd4179 | 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 | |
573c24c4 | 525 | ls->ls_recover_buf = kmalloc(dlm_config.ci_buffer_size, GFP_NOFS); |
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 | 539 | spin_lock(&lslist_lock); |
0f8e0d9a | 540 | ls->ls_create_count = 1; |
5f88f1ea DT |
541 | list_add(&ls->ls_list, &lslist); |
542 | spin_unlock(&lslist_lock); | |
543 | ||
544 | /* needs to find ls in lslist */ | |
e7fd4179 DT |
545 | error = dlm_recoverd_start(ls); |
546 | if (error) { | |
547 | log_error(ls, "can't start dlm_recoverd %d", error); | |
79d72b54 | 548 | goto out_delist; |
e7fd4179 DT |
549 | } |
550 | ||
901195ed GKH |
551 | ls->ls_kobj.kset = dlm_kset; |
552 | error = kobject_init_and_add(&ls->ls_kobj, &dlm_ktype, NULL, | |
553 | "%s", ls->ls_name); | |
e7fd4179 | 554 | if (error) |
79d72b54 | 555 | goto out_stop; |
901195ed | 556 | kobject_uevent(&ls->ls_kobj, KOBJ_ADD); |
79d72b54 DT |
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 | *lockspace = ls; |
580 | return 0; | |
581 | ||
8b0e7b2c DT |
582 | out_members: |
583 | do_uevent(ls, 0); | |
584 | dlm_clear_members(ls); | |
585 | kfree(ls->ls_node_array); | |
79d72b54 | 586 | out_stop: |
5f88f1ea | 587 | dlm_recoverd_stop(ls); |
79d72b54 | 588 | out_delist: |
e7fd4179 DT |
589 | spin_lock(&lslist_lock); |
590 | list_del(&ls->ls_list); | |
591 | spin_unlock(&lslist_lock); | |
e7fd4179 DT |
592 | kfree(ls->ls_recover_buf); |
593 | out_dirfree: | |
594 | kfree(ls->ls_dirtbl); | |
595 | out_lkbfree: | |
596 | kfree(ls->ls_lkbtbl); | |
597 | out_rsbfree: | |
598 | kfree(ls->ls_rsbtbl); | |
599 | out_lsfree: | |
79d72b54 | 600 | if (do_unreg) |
197b12d6 | 601 | kobject_put(&ls->ls_kobj); |
79d72b54 DT |
602 | else |
603 | kfree(ls); | |
e7fd4179 DT |
604 | out: |
605 | module_put(THIS_MODULE); | |
606 | return error; | |
607 | } | |
608 | ||
08ce4c91 | 609 | int dlm_new_lockspace(const char *name, int namelen, void **lockspace, |
e7fd4179 DT |
610 | uint32_t flags, int lvblen) |
611 | { | |
612 | int error = 0; | |
613 | ||
90135925 | 614 | mutex_lock(&ls_lock); |
e7fd4179 DT |
615 | if (!ls_count) |
616 | error = threads_start(); | |
617 | if (error) | |
618 | goto out; | |
619 | ||
620 | error = new_lockspace(name, namelen, lockspace, flags, lvblen); | |
621 | if (!error) | |
622 | ls_count++; | |
8511a272 DT |
623 | if (error > 0) |
624 | error = 0; | |
625 | if (!ls_count) | |
8b0e7b2c | 626 | threads_stop(); |
e7fd4179 | 627 | out: |
90135925 | 628 | mutex_unlock(&ls_lock); |
e7fd4179 DT |
629 | return error; |
630 | } | |
631 | ||
632 | /* Return 1 if the lockspace still has active remote locks, | |
633 | * 2 if the lockspace still has active local locks. | |
634 | */ | |
635 | static int lockspace_busy(struct dlm_ls *ls) | |
636 | { | |
637 | int i, lkb_found = 0; | |
638 | struct dlm_lkb *lkb; | |
639 | ||
640 | /* NOTE: We check the lockidtbl here rather than the resource table. | |
641 | This is because there may be LKBs queued as ASTs that have been | |
642 | unlinked from their RSBs and are pending deletion once the AST has | |
643 | been delivered */ | |
644 | ||
645 | for (i = 0; i < ls->ls_lkbtbl_size; i++) { | |
646 | read_lock(&ls->ls_lkbtbl[i].lock); | |
647 | if (!list_empty(&ls->ls_lkbtbl[i].list)) { | |
648 | lkb_found = 1; | |
649 | list_for_each_entry(lkb, &ls->ls_lkbtbl[i].list, | |
650 | lkb_idtbl_list) { | |
651 | if (!lkb->lkb_nodeid) { | |
652 | read_unlock(&ls->ls_lkbtbl[i].lock); | |
653 | return 2; | |
654 | } | |
655 | } | |
656 | } | |
657 | read_unlock(&ls->ls_lkbtbl[i].lock); | |
658 | } | |
659 | return lkb_found; | |
660 | } | |
661 | ||
662 | static int release_lockspace(struct dlm_ls *ls, int force) | |
663 | { | |
664 | struct dlm_lkb *lkb; | |
665 | struct dlm_rsb *rsb; | |
666 | struct list_head *head; | |
0f8e0d9a DT |
667 | int i, busy, rv; |
668 | ||
669 | busy = lockspace_busy(ls); | |
670 | ||
671 | spin_lock(&lslist_lock); | |
672 | if (ls->ls_create_count == 1) { | |
673 | if (busy > force) | |
674 | rv = -EBUSY; | |
675 | else { | |
676 | /* remove_lockspace takes ls off lslist */ | |
677 | ls->ls_create_count = 0; | |
678 | rv = 0; | |
679 | } | |
680 | } else if (ls->ls_create_count > 1) { | |
681 | rv = --ls->ls_create_count; | |
682 | } else { | |
683 | rv = -EINVAL; | |
684 | } | |
685 | spin_unlock(&lslist_lock); | |
686 | ||
687 | if (rv) { | |
688 | log_debug(ls, "release_lockspace no remove %d", rv); | |
689 | return rv; | |
690 | } | |
e7fd4179 | 691 | |
0f8e0d9a | 692 | dlm_device_deregister(ls); |
e7fd4179 | 693 | |
dc68c7ed | 694 | if (force < 3 && dlm_user_daemon_available()) |
e7fd4179 DT |
695 | do_uevent(ls, 0); |
696 | ||
697 | dlm_recoverd_stop(ls); | |
698 | ||
699 | remove_lockspace(ls); | |
700 | ||
701 | dlm_delete_debug_file(ls); | |
702 | ||
703 | dlm_astd_suspend(); | |
704 | ||
705 | kfree(ls->ls_recover_buf); | |
706 | ||
707 | /* | |
708 | * Free direntry structs. | |
709 | */ | |
710 | ||
711 | dlm_dir_clear(ls); | |
712 | kfree(ls->ls_dirtbl); | |
713 | ||
714 | /* | |
715 | * Free all lkb's on lkbtbl[] lists. | |
716 | */ | |
717 | ||
718 | for (i = 0; i < ls->ls_lkbtbl_size; i++) { | |
719 | head = &ls->ls_lkbtbl[i].list; | |
720 | while (!list_empty(head)) { | |
721 | lkb = list_entry(head->next, struct dlm_lkb, | |
722 | lkb_idtbl_list); | |
723 | ||
724 | list_del(&lkb->lkb_idtbl_list); | |
725 | ||
726 | dlm_del_ast(lkb); | |
727 | ||
728 | if (lkb->lkb_lvbptr && lkb->lkb_flags & DLM_IFL_MSTCPY) | |
52bda2b5 | 729 | dlm_free_lvb(lkb->lkb_lvbptr); |
e7fd4179 | 730 | |
52bda2b5 | 731 | dlm_free_lkb(lkb); |
e7fd4179 DT |
732 | } |
733 | } | |
734 | dlm_astd_resume(); | |
735 | ||
736 | kfree(ls->ls_lkbtbl); | |
737 | ||
738 | /* | |
739 | * Free all rsb's on rsbtbl[] lists | |
740 | */ | |
741 | ||
742 | for (i = 0; i < ls->ls_rsbtbl_size; i++) { | |
743 | head = &ls->ls_rsbtbl[i].list; | |
744 | while (!list_empty(head)) { | |
745 | rsb = list_entry(head->next, struct dlm_rsb, | |
746 | res_hashchain); | |
747 | ||
748 | list_del(&rsb->res_hashchain); | |
52bda2b5 | 749 | dlm_free_rsb(rsb); |
e7fd4179 DT |
750 | } |
751 | ||
752 | head = &ls->ls_rsbtbl[i].toss; | |
753 | while (!list_empty(head)) { | |
754 | rsb = list_entry(head->next, struct dlm_rsb, | |
755 | res_hashchain); | |
756 | list_del(&rsb->res_hashchain); | |
52bda2b5 | 757 | dlm_free_rsb(rsb); |
e7fd4179 DT |
758 | } |
759 | } | |
760 | ||
761 | kfree(ls->ls_rsbtbl); | |
762 | ||
763 | /* | |
764 | * Free structures on any other lists | |
765 | */ | |
766 | ||
2896ee37 | 767 | dlm_purge_requestqueue(ls); |
e7fd4179 DT |
768 | kfree(ls->ls_recover_args); |
769 | dlm_clear_free_entries(ls); | |
770 | dlm_clear_members(ls); | |
771 | dlm_clear_members_gone(ls); | |
772 | kfree(ls->ls_node_array); | |
0f8e0d9a | 773 | log_debug(ls, "release_lockspace final free"); |
197b12d6 | 774 | kobject_put(&ls->ls_kobj); |
79d72b54 | 775 | /* The ls structure will be freed when the kobject is done with */ |
e7fd4179 | 776 | |
e7fd4179 DT |
777 | module_put(THIS_MODULE); |
778 | return 0; | |
779 | } | |
780 | ||
781 | /* | |
782 | * Called when a system has released all its locks and is not going to use the | |
783 | * lockspace any longer. We free everything we're managing for this lockspace. | |
784 | * Remaining nodes will go through the recovery process as if we'd died. The | |
785 | * lockspace must continue to function as usual, participating in recoveries, | |
786 | * until this returns. | |
787 | * | |
788 | * Force has 4 possible values: | |
789 | * 0 - don't destroy locksapce if it has any LKBs | |
790 | * 1 - destroy lockspace if it has remote LKBs but not if it has local LKBs | |
791 | * 2 - destroy lockspace regardless of LKBs | |
792 | * 3 - destroy lockspace as part of a forced shutdown | |
793 | */ | |
794 | ||
795 | int dlm_release_lockspace(void *lockspace, int force) | |
796 | { | |
797 | struct dlm_ls *ls; | |
0f8e0d9a | 798 | int error; |
e7fd4179 DT |
799 | |
800 | ls = dlm_find_lockspace_local(lockspace); | |
801 | if (!ls) | |
802 | return -EINVAL; | |
803 | dlm_put_lockspace(ls); | |
0f8e0d9a DT |
804 | |
805 | mutex_lock(&ls_lock); | |
806 | error = release_lockspace(ls, force); | |
807 | if (!error) | |
808 | ls_count--; | |
278afcbf | 809 | if (!ls_count) |
0f8e0d9a DT |
810 | threads_stop(); |
811 | mutex_unlock(&ls_lock); | |
812 | ||
813 | return error; | |
e7fd4179 DT |
814 | } |
815 | ||
dc68c7ed DT |
816 | void dlm_stop_lockspaces(void) |
817 | { | |
818 | struct dlm_ls *ls; | |
819 | ||
820 | restart: | |
821 | spin_lock(&lslist_lock); | |
822 | list_for_each_entry(ls, &lslist, ls_list) { | |
823 | if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) | |
824 | continue; | |
825 | spin_unlock(&lslist_lock); | |
826 | log_error(ls, "no userland control daemon, stopping lockspace"); | |
827 | dlm_ls_stop(ls); | |
828 | goto restart; | |
829 | } | |
830 | spin_unlock(&lslist_lock); | |
831 | } | |
832 |