Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux/fpc-iii.git] / fs / gfs2 / sys.c
blobd09f6edda0ff8d55f31ef04dba7f4720852f7a8d
1 /*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
10 #include <linux/sched.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/module.h>
15 #include <linux/kobject.h>
16 #include <asm/uaccess.h>
17 #include <linux/gfs2_ondisk.h>
18 #include <linux/genhd.h>
20 #include "gfs2.h"
21 #include "incore.h"
22 #include "sys.h"
23 #include "super.h"
24 #include "glock.h"
25 #include "quota.h"
26 #include "util.h"
27 #include "glops.h"
28 #include "recovery.h"
30 struct gfs2_attr {
31 struct attribute attr;
32 ssize_t (*show)(struct gfs2_sbd *, char *);
33 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
36 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
37 char *buf)
39 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
40 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
41 return a->show ? a->show(sdp, buf) : 0;
44 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
45 const char *buf, size_t len)
47 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
48 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
49 return a->store ? a->store(sdp, buf, len) : len;
52 static const struct sysfs_ops gfs2_attr_ops = {
53 .show = gfs2_attr_show,
54 .store = gfs2_attr_store,
58 static struct kset *gfs2_kset;
60 static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
62 return snprintf(buf, PAGE_SIZE, "%u:%u\n",
63 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
66 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
68 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
71 static int gfs2_uuid_valid(const u8 *uuid)
73 int i;
75 for (i = 0; i < 16; i++) {
76 if (uuid[i])
77 return 1;
79 return 0;
82 static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
84 struct super_block *s = sdp->sd_vfs;
85 const u8 *uuid = s->s_uuid;
86 buf[0] = '\0';
87 if (!gfs2_uuid_valid(uuid))
88 return 0;
89 return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
92 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
94 struct super_block *sb = sdp->sd_vfs;
95 int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
97 return snprintf(buf, PAGE_SIZE, "%u\n", frozen);
100 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
102 int error;
103 int n = simple_strtol(buf, NULL, 0);
105 if (!capable(CAP_SYS_ADMIN))
106 return -EPERM;
108 switch (n) {
109 case 0:
110 error = thaw_super(sdp->sd_vfs);
111 break;
112 case 1:
113 error = freeze_super(sdp->sd_vfs);
114 break;
115 default:
116 return -EINVAL;
119 if (error) {
120 fs_warn(sdp, "freeze %d error %d", n, error);
121 return error;
124 return len;
127 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
129 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
130 return snprintf(buf, PAGE_SIZE, "%u\n", b);
133 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
135 if (!capable(CAP_SYS_ADMIN))
136 return -EPERM;
138 if (simple_strtol(buf, NULL, 0) != 1)
139 return -EINVAL;
141 gfs2_lm_withdraw(sdp,
142 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
143 sdp->sd_fsname);
144 return len;
147 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
148 size_t len)
150 if (!capable(CAP_SYS_ADMIN))
151 return -EPERM;
153 if (simple_strtol(buf, NULL, 0) != 1)
154 return -EINVAL;
156 gfs2_statfs_sync(sdp->sd_vfs, 0);
157 return len;
160 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
161 size_t len)
163 if (!capable(CAP_SYS_ADMIN))
164 return -EPERM;
166 if (simple_strtol(buf, NULL, 0) != 1)
167 return -EINVAL;
169 gfs2_quota_sync(sdp->sd_vfs, 0);
170 return len;
173 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
174 size_t len)
176 struct kqid qid;
177 int error;
178 u32 id;
180 if (!capable(CAP_SYS_ADMIN))
181 return -EPERM;
183 id = simple_strtoul(buf, NULL, 0);
185 qid = make_kqid(current_user_ns(), USRQUOTA, id);
186 if (!qid_valid(qid))
187 return -EINVAL;
189 error = gfs2_quota_refresh(sdp, qid);
190 return error ? error : len;
193 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
194 size_t len)
196 struct kqid qid;
197 int error;
198 u32 id;
200 if (!capable(CAP_SYS_ADMIN))
201 return -EPERM;
203 id = simple_strtoul(buf, NULL, 0);
205 qid = make_kqid(current_user_ns(), GRPQUOTA, id);
206 if (!qid_valid(qid))
207 return -EINVAL;
209 error = gfs2_quota_refresh(sdp, qid);
210 return error ? error : len;
213 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
215 struct gfs2_glock *gl;
216 const struct gfs2_glock_operations *glops;
217 unsigned int glmode;
218 unsigned int gltype;
219 unsigned long long glnum;
220 char mode[16];
221 int rv;
223 if (!capable(CAP_SYS_ADMIN))
224 return -EPERM;
226 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
227 mode);
228 if (rv != 3)
229 return -EINVAL;
231 if (strcmp(mode, "EX") == 0)
232 glmode = LM_ST_UNLOCKED;
233 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
234 glmode = LM_ST_DEFERRED;
235 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
236 glmode = LM_ST_SHARED;
237 else
238 return -EINVAL;
240 if (gltype > LM_TYPE_JOURNAL)
241 return -EINVAL;
242 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_TRANS_LOCK)
243 glops = &gfs2_trans_glops;
244 else
245 glops = gfs2_glops_list[gltype];
246 if (glops == NULL)
247 return -EINVAL;
248 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
249 fs_info(sdp, "demote interface used\n");
250 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
251 if (rv)
252 return rv;
253 gfs2_glock_cb(gl, glmode);
254 gfs2_glock_put(gl);
255 return len;
259 #define GFS2_ATTR(name, mode, show, store) \
260 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
262 GFS2_ATTR(id, 0444, id_show, NULL);
263 GFS2_ATTR(fsname, 0444, fsname_show, NULL);
264 GFS2_ATTR(uuid, 0444, uuid_show, NULL);
265 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
266 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
267 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
268 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
269 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
270 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
271 GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
273 static struct attribute *gfs2_attrs[] = {
274 &gfs2_attr_id.attr,
275 &gfs2_attr_fsname.attr,
276 &gfs2_attr_uuid.attr,
277 &gfs2_attr_freeze.attr,
278 &gfs2_attr_withdraw.attr,
279 &gfs2_attr_statfs_sync.attr,
280 &gfs2_attr_quota_sync.attr,
281 &gfs2_attr_quota_refresh_user.attr,
282 &gfs2_attr_quota_refresh_group.attr,
283 &gfs2_attr_demote_rq.attr,
284 NULL,
287 static void gfs2_sbd_release(struct kobject *kobj)
289 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
291 kfree(sdp);
294 static struct kobj_type gfs2_ktype = {
295 .release = gfs2_sbd_release,
296 .default_attrs = gfs2_attrs,
297 .sysfs_ops = &gfs2_attr_ops,
302 * lock_module. Originally from lock_dlm
305 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
307 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
308 return sprintf(buf, "%s\n", ops->lm_proto_name);
311 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
313 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
314 ssize_t ret;
315 int val = 0;
317 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
318 val = 1;
319 ret = sprintf(buf, "%d\n", val);
320 return ret;
323 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
325 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
326 ssize_t ret = len;
327 int val;
329 val = simple_strtol(buf, NULL, 0);
331 if (val == 1)
332 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
333 else if (val == 0) {
334 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
335 smp_mb__after_clear_bit();
336 gfs2_glock_thaw(sdp);
337 } else {
338 ret = -EINVAL;
340 return ret;
343 static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
345 int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
347 return sprintf(buf, "%d\n", val);
350 static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
352 ssize_t ret = len;
353 int val;
355 val = simple_strtol(buf, NULL, 0);
357 if ((val == 1) &&
358 !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
359 complete(&sdp->sd_wdack);
360 else
361 ret = -EINVAL;
362 return ret;
365 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
367 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
368 return sprintf(buf, "%d\n", ls->ls_first);
371 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
373 unsigned first;
374 int rv;
376 rv = sscanf(buf, "%u", &first);
377 if (rv != 1 || first > 1)
378 return -EINVAL;
379 rv = wait_for_completion_killable(&sdp->sd_locking_init);
380 if (rv)
381 return rv;
382 spin_lock(&sdp->sd_jindex_spin);
383 rv = -EBUSY;
384 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
385 goto out;
386 rv = -EINVAL;
387 if (sdp->sd_args.ar_spectator)
388 goto out;
389 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
390 goto out;
391 sdp->sd_lockstruct.ls_first = first;
392 rv = 0;
393 out:
394 spin_unlock(&sdp->sd_jindex_spin);
395 return rv ? rv : len;
398 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
400 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
401 return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
404 int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
406 struct gfs2_jdesc *jd;
407 int rv;
409 spin_lock(&sdp->sd_jindex_spin);
410 rv = -EBUSY;
411 if (sdp->sd_jdesc->jd_jid == jid)
412 goto out;
413 rv = -ENOENT;
414 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
415 if (jd->jd_jid != jid)
416 continue;
417 rv = gfs2_recover_journal(jd, false);
418 break;
420 out:
421 spin_unlock(&sdp->sd_jindex_spin);
422 return rv;
425 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
427 unsigned jid;
428 int rv;
430 rv = sscanf(buf, "%u", &jid);
431 if (rv != 1)
432 return -EINVAL;
434 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
435 rv = -ESHUTDOWN;
436 goto out;
439 rv = gfs2_recover_set(sdp, jid);
440 out:
441 return rv ? rv : len;
444 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
446 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
447 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
450 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
452 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
453 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
456 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
458 return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
461 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
463 int jid;
464 int rv;
466 rv = sscanf(buf, "%d", &jid);
467 if (rv != 1)
468 return -EINVAL;
469 rv = wait_for_completion_killable(&sdp->sd_locking_init);
470 if (rv)
471 return rv;
472 spin_lock(&sdp->sd_jindex_spin);
473 rv = -EINVAL;
474 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
475 goto out;
476 rv = -EBUSY;
477 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
478 goto out;
479 rv = 0;
480 if (sdp->sd_args.ar_spectator && jid > 0)
481 rv = jid = -EINVAL;
482 sdp->sd_lockstruct.ls_jid = jid;
483 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
484 smp_mb__after_clear_bit();
485 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
486 out:
487 spin_unlock(&sdp->sd_jindex_spin);
488 return rv ? rv : len;
491 #define GDLM_ATTR(_name,_mode,_show,_store) \
492 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
494 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
495 GDLM_ATTR(block, 0644, block_show, block_store);
496 GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store);
497 GDLM_ATTR(jid, 0644, jid_show, jid_store);
498 GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
499 GDLM_ATTR(first_done, 0444, first_done_show, NULL);
500 GDLM_ATTR(recover, 0600, NULL, recover_store);
501 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
502 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
504 static struct attribute *lock_module_attrs[] = {
505 &gdlm_attr_proto_name.attr,
506 &gdlm_attr_block.attr,
507 &gdlm_attr_withdraw.attr,
508 &gdlm_attr_jid.attr,
509 &gdlm_attr_first.attr,
510 &gdlm_attr_first_done.attr,
511 &gdlm_attr_recover.attr,
512 &gdlm_attr_recover_done.attr,
513 &gdlm_attr_recover_status.attr,
514 NULL,
518 * get and set struct gfs2_tune fields
521 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
523 return snprintf(buf, PAGE_SIZE, "%u %u\n",
524 sdp->sd_tune.gt_quota_scale_num,
525 sdp->sd_tune.gt_quota_scale_den);
528 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
529 size_t len)
531 struct gfs2_tune *gt = &sdp->sd_tune;
532 unsigned int x, y;
534 if (!capable(CAP_SYS_ADMIN))
535 return -EPERM;
537 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
538 return -EINVAL;
540 spin_lock(&gt->gt_spin);
541 gt->gt_quota_scale_num = x;
542 gt->gt_quota_scale_den = y;
543 spin_unlock(&gt->gt_spin);
544 return len;
547 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
548 int check_zero, const char *buf, size_t len)
550 struct gfs2_tune *gt = &sdp->sd_tune;
551 unsigned int x;
553 if (!capable(CAP_SYS_ADMIN))
554 return -EPERM;
556 x = simple_strtoul(buf, NULL, 0);
558 if (check_zero && !x)
559 return -EINVAL;
561 spin_lock(&gt->gt_spin);
562 *field = x;
563 spin_unlock(&gt->gt_spin);
564 return len;
567 #define TUNE_ATTR_3(name, show, store) \
568 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
570 #define TUNE_ATTR_2(name, store) \
571 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
573 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
575 TUNE_ATTR_3(name, name##_show, store)
577 #define TUNE_ATTR(name, check_zero) \
578 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
580 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
582 TUNE_ATTR_2(name, name##_store)
584 TUNE_ATTR(quota_warn_period, 0);
585 TUNE_ATTR(quota_quantum, 0);
586 TUNE_ATTR(max_readahead, 0);
587 TUNE_ATTR(complain_secs, 0);
588 TUNE_ATTR(statfs_slow, 0);
589 TUNE_ATTR(new_files_jdata, 0);
590 TUNE_ATTR(statfs_quantum, 1);
591 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
593 static struct attribute *tune_attrs[] = {
594 &tune_attr_quota_warn_period.attr,
595 &tune_attr_quota_quantum.attr,
596 &tune_attr_max_readahead.attr,
597 &tune_attr_complain_secs.attr,
598 &tune_attr_statfs_slow.attr,
599 &tune_attr_statfs_quantum.attr,
600 &tune_attr_quota_scale.attr,
601 &tune_attr_new_files_jdata.attr,
602 NULL,
605 static struct attribute_group tune_group = {
606 .name = "tune",
607 .attrs = tune_attrs,
610 static struct attribute_group lock_module_group = {
611 .name = "lock_module",
612 .attrs = lock_module_attrs,
615 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
617 struct super_block *sb = sdp->sd_vfs;
618 int error;
619 char ro[20];
620 char spectator[20];
621 char *envp[] = { ro, spectator, NULL };
622 int sysfs_frees_sdp = 0;
624 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
625 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
627 sdp->sd_kobj.kset = gfs2_kset;
628 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
629 "%s", sdp->sd_table_name);
630 if (error)
631 goto fail_reg;
633 sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling
634 function gfs2_sbd_release. */
635 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
636 if (error)
637 goto fail_reg;
639 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
640 if (error)
641 goto fail_tune;
643 error = sysfs_create_link(&sdp->sd_kobj,
644 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
645 "device");
646 if (error)
647 goto fail_lock_module;
649 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
650 return 0;
652 fail_lock_module:
653 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
654 fail_tune:
655 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
656 fail_reg:
657 free_percpu(sdp->sd_lkstats);
658 fs_err(sdp, "error %d adding sysfs files", error);
659 if (sysfs_frees_sdp)
660 kobject_put(&sdp->sd_kobj);
661 else
662 kfree(sdp);
663 sb->s_fs_info = NULL;
664 return error;
667 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
669 sysfs_remove_link(&sdp->sd_kobj, "device");
670 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
671 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
672 kobject_put(&sdp->sd_kobj);
675 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
676 struct kobj_uevent_env *env)
678 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
679 struct super_block *s = sdp->sd_vfs;
680 const u8 *uuid = s->s_uuid;
682 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
683 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
684 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
685 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
686 if (gfs2_uuid_valid(uuid))
687 add_uevent_var(env, "UUID=%pUB", uuid);
688 return 0;
691 static const struct kset_uevent_ops gfs2_uevent_ops = {
692 .uevent = gfs2_uevent,
695 int gfs2_sys_init(void)
697 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
698 if (!gfs2_kset)
699 return -ENOMEM;
700 return 0;
703 void gfs2_sys_uninit(void)
705 kset_unregister(gfs2_kset);