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10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/sched.h>
13#include <linux/cred.h>
14#include <linux/spinlock.h>
15#include <linux/completion.h>
16#include <linux/buffer_head.h>
17#include <linux/module.h>
18#include <linux/kobject.h>
19#include <linux/uaccess.h>
20#include <linux/gfs2_ondisk.h>
21#include <linux/genhd.h>
22
23#include "gfs2.h"
24#include "incore.h"
25#include "sys.h"
26#include "super.h"
27#include "glock.h"
28#include "quota.h"
29#include "util.h"
30#include "glops.h"
31#include "recovery.h"
32
33struct gfs2_attr {
34 struct attribute attr;
35 ssize_t (*show)(struct gfs2_sbd *, char *);
36 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
37};
38
39static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
40 char *buf)
41{
42 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
43 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
44 return a->show ? a->show(sdp, buf) : 0;
45}
46
47static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
48 const char *buf, size_t len)
49{
50 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
51 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
52 return a->store ? a->store(sdp, buf, len) : len;
53}
54
55static const struct sysfs_ops gfs2_attr_ops = {
56 .show = gfs2_attr_show,
57 .store = gfs2_attr_store,
58};
59
60
61static struct kset *gfs2_kset;
62
63static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
64{
65 return snprintf(buf, PAGE_SIZE, "%u:%u\n",
66 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
67}
68
69static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
70{
71 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
72}
73
74static int gfs2_uuid_valid(const u8 *uuid)
75{
76 int i;
77
78 for (i = 0; i < 16; i++) {
79 if (uuid[i])
80 return 1;
81 }
82 return 0;
83}
84
85static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
86{
87 struct super_block *s = sdp->sd_vfs;
88 const u8 *uuid = s->s_uuid;
89 buf[0] = '\0';
90 if (!gfs2_uuid_valid(uuid))
91 return 0;
92 return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
93}
94
95static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
96{
97 struct super_block *sb = sdp->sd_vfs;
98 int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
99
100 return snprintf(buf, PAGE_SIZE, "%d\n", frozen);
101}
102
103static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
104{
105 int error, n;
106
107 error = kstrtoint(buf, 0, &n);
108 if (error)
109 return error;
110
111 if (!capable(CAP_SYS_ADMIN))
112 return -EPERM;
113
114 switch (n) {
115 case 0:
116 error = thaw_super(sdp->sd_vfs);
117 break;
118 case 1:
119 error = freeze_super(sdp->sd_vfs);
120 break;
121 default:
122 return -EINVAL;
123 }
124
125 if (error) {
126 fs_warn(sdp, "freeze %d error %d", n, error);
127 return error;
128 }
129
130 return len;
131}
132
133static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
134{
135 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
136 return snprintf(buf, PAGE_SIZE, "%u\n", b);
137}
138
139static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
140{
141 int error, val;
142
143 if (!capable(CAP_SYS_ADMIN))
144 return -EPERM;
145
146 error = kstrtoint(buf, 0, &val);
147 if (error)
148 return error;
149
150 if (val != 1)
151 return -EINVAL;
152
153 gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n");
154
155 return len;
156}
157
158static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
159 size_t len)
160{
161 int error, val;
162
163 if (!capable(CAP_SYS_ADMIN))
164 return -EPERM;
165
166 error = kstrtoint(buf, 0, &val);
167 if (error)
168 return error;
169
170 if (val != 1)
171 return -EINVAL;
172
173 gfs2_statfs_sync(sdp->sd_vfs, 0);
174 return len;
175}
176
177static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
178 size_t len)
179{
180 int error, val;
181
182 if (!capable(CAP_SYS_ADMIN))
183 return -EPERM;
184
185 error = kstrtoint(buf, 0, &val);
186 if (error)
187 return error;
188
189 if (val != 1)
190 return -EINVAL;
191
192 gfs2_quota_sync(sdp->sd_vfs, 0);
193 return len;
194}
195
196static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
197 size_t len)
198{
199 struct kqid qid;
200 int error;
201 u32 id;
202
203 if (!capable(CAP_SYS_ADMIN))
204 return -EPERM;
205
206 error = kstrtou32(buf, 0, &id);
207 if (error)
208 return error;
209
210 qid = make_kqid(current_user_ns(), USRQUOTA, id);
211 if (!qid_valid(qid))
212 return -EINVAL;
213
214 error = gfs2_quota_refresh(sdp, qid);
215 return error ? error : len;
216}
217
218static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
219 size_t len)
220{
221 struct kqid qid;
222 int error;
223 u32 id;
224
225 if (!capable(CAP_SYS_ADMIN))
226 return -EPERM;
227
228 error = kstrtou32(buf, 0, &id);
229 if (error)
230 return error;
231
232 qid = make_kqid(current_user_ns(), GRPQUOTA, id);
233 if (!qid_valid(qid))
234 return -EINVAL;
235
236 error = gfs2_quota_refresh(sdp, qid);
237 return error ? error : len;
238}
239
240static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
241{
242 struct gfs2_glock *gl;
243 const struct gfs2_glock_operations *glops;
244 unsigned int glmode;
245 unsigned int gltype;
246 unsigned long long glnum;
247 char mode[16];
248 int rv;
249
250 if (!capable(CAP_SYS_ADMIN))
251 return -EPERM;
252
253 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
254 mode);
255 if (rv != 3)
256 return -EINVAL;
257
258 if (strcmp(mode, "EX") == 0)
259 glmode = LM_ST_UNLOCKED;
260 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
261 glmode = LM_ST_DEFERRED;
262 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
263 glmode = LM_ST_SHARED;
264 else
265 return -EINVAL;
266
267 if (gltype > LM_TYPE_JOURNAL)
268 return -EINVAL;
269 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
270 glops = &gfs2_freeze_glops;
271 else
272 glops = gfs2_glops_list[gltype];
273 if (glops == NULL)
274 return -EINVAL;
275 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
276 fs_info(sdp, "demote interface used\n");
277 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
278 if (rv)
279 return rv;
280 gfs2_glock_cb(gl, glmode);
281 gfs2_glock_put(gl);
282 return len;
283}
284
285
286#define GFS2_ATTR(name, mode, show, store) \
287static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
288
289GFS2_ATTR(id, 0444, id_show, NULL);
290GFS2_ATTR(fsname, 0444, fsname_show, NULL);
291GFS2_ATTR(uuid, 0444, uuid_show, NULL);
292GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
293GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
294GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
295GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
296GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
297GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
298GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
299
300static struct attribute *gfs2_attrs[] = {
301 &gfs2_attr_id.attr,
302 &gfs2_attr_fsname.attr,
303 &gfs2_attr_uuid.attr,
304 &gfs2_attr_freeze.attr,
305 &gfs2_attr_withdraw.attr,
306 &gfs2_attr_statfs_sync.attr,
307 &gfs2_attr_quota_sync.attr,
308 &gfs2_attr_quota_refresh_user.attr,
309 &gfs2_attr_quota_refresh_group.attr,
310 &gfs2_attr_demote_rq.attr,
311 NULL,
312};
313
314static void gfs2_sbd_release(struct kobject *kobj)
315{
316 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
317
318 kfree(sdp);
319}
320
321static struct kobj_type gfs2_ktype = {
322 .release = gfs2_sbd_release,
323 .default_attrs = gfs2_attrs,
324 .sysfs_ops = &gfs2_attr_ops,
325};
326
327
328
329
330
331
332static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
333{
334 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
335 return sprintf(buf, "%s\n", ops->lm_proto_name);
336}
337
338static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
339{
340 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
341 ssize_t ret;
342 int val = 0;
343
344 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
345 val = 1;
346 ret = sprintf(buf, "%d\n", val);
347 return ret;
348}
349
350static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
351{
352 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
353 int ret, val;
354
355 ret = kstrtoint(buf, 0, &val);
356 if (ret)
357 return ret;
358
359 if (val == 1)
360 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
361 else if (val == 0) {
362 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
363 smp_mb__after_atomic();
364 gfs2_glock_thaw(sdp);
365 } else {
366 return -EINVAL;
367 }
368 return len;
369}
370
371static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
372{
373 int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
374
375 return sprintf(buf, "%d\n", val);
376}
377
378static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
379{
380 int ret, val;
381
382 ret = kstrtoint(buf, 0, &val);
383 if (ret)
384 return ret;
385
386 if ((val == 1) &&
387 !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
388 complete(&sdp->sd_wdack);
389 else
390 return -EINVAL;
391 return len;
392}
393
394static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
395{
396 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
397 return sprintf(buf, "%d\n", ls->ls_first);
398}
399
400static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
401{
402 unsigned first;
403 int rv;
404
405 rv = sscanf(buf, "%u", &first);
406 if (rv != 1 || first > 1)
407 return -EINVAL;
408 rv = wait_for_completion_killable(&sdp->sd_locking_init);
409 if (rv)
410 return rv;
411 spin_lock(&sdp->sd_jindex_spin);
412 rv = -EBUSY;
413 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
414 goto out;
415 rv = -EINVAL;
416 if (sdp->sd_args.ar_spectator)
417 goto out;
418 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
419 goto out;
420 sdp->sd_lockstruct.ls_first = first;
421 rv = 0;
422out:
423 spin_unlock(&sdp->sd_jindex_spin);
424 return rv ? rv : len;
425}
426
427static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
428{
429 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
430 return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
431}
432
433int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
434{
435 struct gfs2_jdesc *jd;
436 int rv;
437
438
439 wait_for_completion(&sdp->sd_journal_ready);
440
441 spin_lock(&sdp->sd_jindex_spin);
442 rv = -EBUSY;
443 if (sdp->sd_jdesc->jd_jid == jid)
444 goto out;
445 rv = -ENOENT;
446 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
447 if (jd->jd_jid != jid)
448 continue;
449 rv = gfs2_recover_journal(jd, false);
450 break;
451 }
452out:
453 spin_unlock(&sdp->sd_jindex_spin);
454 return rv;
455}
456
457static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
458{
459 unsigned jid;
460 int rv;
461
462 rv = sscanf(buf, "%u", &jid);
463 if (rv != 1)
464 return -EINVAL;
465
466 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
467 rv = -ESHUTDOWN;
468 goto out;
469 }
470
471 rv = gfs2_recover_set(sdp, jid);
472out:
473 return rv ? rv : len;
474}
475
476static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
477{
478 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
479 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
480}
481
482static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
483{
484 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
485 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
486}
487
488static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
489{
490 return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
491}
492
493static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
494{
495 int jid;
496 int rv;
497
498 rv = sscanf(buf, "%d", &jid);
499 if (rv != 1)
500 return -EINVAL;
501 rv = wait_for_completion_killable(&sdp->sd_locking_init);
502 if (rv)
503 return rv;
504 spin_lock(&sdp->sd_jindex_spin);
505 rv = -EINVAL;
506 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
507 goto out;
508 rv = -EBUSY;
509 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
510 goto out;
511 rv = 0;
512 if (sdp->sd_args.ar_spectator && jid > 0)
513 rv = jid = -EINVAL;
514 sdp->sd_lockstruct.ls_jid = jid;
515 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
516 smp_mb__after_atomic();
517 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
518out:
519 spin_unlock(&sdp->sd_jindex_spin);
520 return rv ? rv : len;
521}
522
523#define GDLM_ATTR(_name,_mode,_show,_store) \
524static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
525
526GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
527GDLM_ATTR(block, 0644, block_show, block_store);
528GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store);
529GDLM_ATTR(jid, 0644, jid_show, jid_store);
530GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
531GDLM_ATTR(first_done, 0444, first_done_show, NULL);
532GDLM_ATTR(recover, 0600, NULL, recover_store);
533GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
534GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
535
536static struct attribute *lock_module_attrs[] = {
537 &gdlm_attr_proto_name.attr,
538 &gdlm_attr_block.attr,
539 &gdlm_attr_withdraw.attr,
540 &gdlm_attr_jid.attr,
541 &gdlm_attr_first.attr,
542 &gdlm_attr_first_done.attr,
543 &gdlm_attr_recover.attr,
544 &gdlm_attr_recover_done.attr,
545 &gdlm_attr_recover_status.attr,
546 NULL,
547};
548
549
550
551
552
553static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
554{
555 return snprintf(buf, PAGE_SIZE, "%u %u\n",
556 sdp->sd_tune.gt_quota_scale_num,
557 sdp->sd_tune.gt_quota_scale_den);
558}
559
560static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
561 size_t len)
562{
563 struct gfs2_tune *gt = &sdp->sd_tune;
564 unsigned int x, y;
565
566 if (!capable(CAP_SYS_ADMIN))
567 return -EPERM;
568
569 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
570 return -EINVAL;
571
572 spin_lock(>->gt_spin);
573 gt->gt_quota_scale_num = x;
574 gt->gt_quota_scale_den = y;
575 spin_unlock(>->gt_spin);
576 return len;
577}
578
579static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
580 int check_zero, const char *buf, size_t len)
581{
582 struct gfs2_tune *gt = &sdp->sd_tune;
583 unsigned int x;
584 int error;
585
586 if (!capable(CAP_SYS_ADMIN))
587 return -EPERM;
588
589 error = kstrtouint(buf, 0, &x);
590 if (error)
591 return error;
592
593 if (check_zero && !x)
594 return -EINVAL;
595
596 spin_lock(>->gt_spin);
597 *field = x;
598 spin_unlock(>->gt_spin);
599 return len;
600}
601
602#define TUNE_ATTR_3(name, show, store) \
603static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
604
605#define TUNE_ATTR_2(name, store) \
606static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
607{ \
608 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
609} \
610TUNE_ATTR_3(name, name##_show, store)
611
612#define TUNE_ATTR(name, check_zero) \
613static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
614{ \
615 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
616} \
617TUNE_ATTR_2(name, name##_store)
618
619TUNE_ATTR(quota_warn_period, 0);
620TUNE_ATTR(quota_quantum, 0);
621TUNE_ATTR(max_readahead, 0);
622TUNE_ATTR(complain_secs, 0);
623TUNE_ATTR(statfs_slow, 0);
624TUNE_ATTR(new_files_jdata, 0);
625TUNE_ATTR(statfs_quantum, 1);
626TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
627
628static struct attribute *tune_attrs[] = {
629 &tune_attr_quota_warn_period.attr,
630 &tune_attr_quota_quantum.attr,
631 &tune_attr_max_readahead.attr,
632 &tune_attr_complain_secs.attr,
633 &tune_attr_statfs_slow.attr,
634 &tune_attr_statfs_quantum.attr,
635 &tune_attr_quota_scale.attr,
636 &tune_attr_new_files_jdata.attr,
637 NULL,
638};
639
640static struct attribute_group tune_group = {
641 .name = "tune",
642 .attrs = tune_attrs,
643};
644
645static struct attribute_group lock_module_group = {
646 .name = "lock_module",
647 .attrs = lock_module_attrs,
648};
649
650int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
651{
652 struct super_block *sb = sdp->sd_vfs;
653 int error;
654 char ro[20];
655 char spectator[20];
656 char *envp[] = { ro, spectator, NULL };
657 int sysfs_frees_sdp = 0;
658
659 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
660 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
661
662 sdp->sd_kobj.kset = gfs2_kset;
663 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
664 "%s", sdp->sd_table_name);
665 if (error)
666 goto fail_reg;
667
668 sysfs_frees_sdp = 1;
669
670 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
671 if (error)
672 goto fail_reg;
673
674 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
675 if (error)
676 goto fail_tune;
677
678 error = sysfs_create_link(&sdp->sd_kobj,
679 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
680 "device");
681 if (error)
682 goto fail_lock_module;
683
684 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
685 return 0;
686
687fail_lock_module:
688 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
689fail_tune:
690 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
691fail_reg:
692 free_percpu(sdp->sd_lkstats);
693 fs_err(sdp, "error %d adding sysfs files", error);
694 if (sysfs_frees_sdp)
695 kobject_put(&sdp->sd_kobj);
696 else
697 kfree(sdp);
698 sb->s_fs_info = NULL;
699 return error;
700}
701
702void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
703{
704 sysfs_remove_link(&sdp->sd_kobj, "device");
705 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
706 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
707 kobject_put(&sdp->sd_kobj);
708}
709
710static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
711 struct kobj_uevent_env *env)
712{
713 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
714 struct super_block *s = sdp->sd_vfs;
715 const u8 *uuid = s->s_uuid;
716
717 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
718 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
719 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
720 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
721 if (gfs2_uuid_valid(uuid))
722 add_uevent_var(env, "UUID=%pUB", uuid);
723 return 0;
724}
725
726static const struct kset_uevent_ops gfs2_uevent_ops = {
727 .uevent = gfs2_uevent,
728};
729
730int gfs2_sys_init(void)
731{
732 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
733 if (!gfs2_kset)
734 return -ENOMEM;
735 return 0;
736}
737
738void gfs2_sys_uninit(void)
739{
740 kset_unregister(gfs2_kset);
741}
742
743
