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1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
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 */
9
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 ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
75{
76 struct super_block *s = sdp->sd_vfs;
77
78 buf[0] = '\0';
79 if (uuid_is_null(&s->s_uuid))
80 return 0;
81 return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid);
82}
83
84static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
85{
86 struct super_block *sb = sdp->sd_vfs;
87 int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
88
89 return snprintf(buf, PAGE_SIZE, "%d\n", frozen);
90}
91
92static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
93{
94 int error, n;
95
96 error = kstrtoint(buf, 0, &n);
97 if (error)
98 return error;
99
100 if (!capable(CAP_SYS_ADMIN))
101 return -EPERM;
102
103 switch (n) {
104 case 0:
105 error = thaw_super(sdp->sd_vfs);
106 break;
107 case 1:
108 error = freeze_super(sdp->sd_vfs);
109 break;
110 default:
111 return -EINVAL;
112 }
113
114 if (error) {
115 fs_warn(sdp, "freeze %d error %d\n", n, error);
116 return error;
117 }
118
119 return len;
120}
121
122static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
123{
124 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
125 return snprintf(buf, PAGE_SIZE, "%u\n", b);
126}
127
128static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
129{
130 int error, val;
131
132 if (!capable(CAP_SYS_ADMIN))
133 return -EPERM;
134
135 error = kstrtoint(buf, 0, &val);
136 if (error)
137 return error;
138
139 if (val != 1)
140 return -EINVAL;
141
142 gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n");
143
144 return len;
145}
146
147static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
148 size_t len)
149{
150 int error, val;
151
152 if (!capable(CAP_SYS_ADMIN))
153 return -EPERM;
154
155 error = kstrtoint(buf, 0, &val);
156 if (error)
157 return error;
158
159 if (val != 1)
160 return -EINVAL;
161
162 gfs2_statfs_sync(sdp->sd_vfs, 0);
163 return len;
164}
165
166static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
167 size_t len)
168{
169 int error, val;
170
171 if (!capable(CAP_SYS_ADMIN))
172 return -EPERM;
173
174 error = kstrtoint(buf, 0, &val);
175 if (error)
176 return error;
177
178 if (val != 1)
179 return -EINVAL;
180
181 gfs2_quota_sync(sdp->sd_vfs, 0);
182 return len;
183}
184
185static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
186 size_t len)
187{
188 struct kqid qid;
189 int error;
190 u32 id;
191
192 if (!capable(CAP_SYS_ADMIN))
193 return -EPERM;
194
195 error = kstrtou32(buf, 0, &id);
196 if (error)
197 return error;
198
199 qid = make_kqid(current_user_ns(), USRQUOTA, id);
200 if (!qid_valid(qid))
201 return -EINVAL;
202
203 error = gfs2_quota_refresh(sdp, qid);
204 return error ? error : len;
205}
206
207static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
208 size_t len)
209{
210 struct kqid qid;
211 int error;
212 u32 id;
213
214 if (!capable(CAP_SYS_ADMIN))
215 return -EPERM;
216
217 error = kstrtou32(buf, 0, &id);
218 if (error)
219 return error;
220
221 qid = make_kqid(current_user_ns(), GRPQUOTA, id);
222 if (!qid_valid(qid))
223 return -EINVAL;
224
225 error = gfs2_quota_refresh(sdp, qid);
226 return error ? error : len;
227}
228
229static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
230{
231 struct gfs2_glock *gl;
232 const struct gfs2_glock_operations *glops;
233 unsigned int glmode;
234 unsigned int gltype;
235 unsigned long long glnum;
236 char mode[16];
237 int rv;
238
239 if (!capable(CAP_SYS_ADMIN))
240 return -EPERM;
241
242 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
243 mode);
244 if (rv != 3)
245 return -EINVAL;
246
247 if (strcmp(mode, "EX") == 0)
248 glmode = LM_ST_UNLOCKED;
249 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
250 glmode = LM_ST_DEFERRED;
251 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
252 glmode = LM_ST_SHARED;
253 else
254 return -EINVAL;
255
256 if (gltype > LM_TYPE_JOURNAL)
257 return -EINVAL;
258 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
259 glops = &gfs2_freeze_glops;
260 else
261 glops = gfs2_glops_list[gltype];
262 if (glops == NULL)
263 return -EINVAL;
264 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
265 fs_info(sdp, "demote interface used\n");
266 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
267 if (rv)
268 return rv;
269 gfs2_glock_cb(gl, glmode);
270 gfs2_glock_put(gl);
271 return len;
272}
273
274
275#define GFS2_ATTR(name, mode, show, store) \
276static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
277
278GFS2_ATTR(id, 0444, id_show, NULL);
279GFS2_ATTR(fsname, 0444, fsname_show, NULL);
280GFS2_ATTR(uuid, 0444, uuid_show, NULL);
281GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
282GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
283GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
284GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
285GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
286GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
287GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
288
289static struct attribute *gfs2_attrs[] = {
290 &gfs2_attr_id.attr,
291 &gfs2_attr_fsname.attr,
292 &gfs2_attr_uuid.attr,
293 &gfs2_attr_freeze.attr,
294 &gfs2_attr_withdraw.attr,
295 &gfs2_attr_statfs_sync.attr,
296 &gfs2_attr_quota_sync.attr,
297 &gfs2_attr_quota_refresh_user.attr,
298 &gfs2_attr_quota_refresh_group.attr,
299 &gfs2_attr_demote_rq.attr,
300 NULL,
301};
302
303static void gfs2_sbd_release(struct kobject *kobj)
304{
305 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
306
307 kfree(sdp);
308}
309
310static struct kobj_type gfs2_ktype = {
311 .release = gfs2_sbd_release,
312 .default_attrs = gfs2_attrs,
313 .sysfs_ops = &gfs2_attr_ops,
314};
315
316
317/*
318 * lock_module. Originally from lock_dlm
319 */
320
321static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
322{
323 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
324 return sprintf(buf, "%s\n", ops->lm_proto_name);
325}
326
327static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
328{
329 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
330 ssize_t ret;
331 int val = 0;
332
333 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
334 val = 1;
335 ret = sprintf(buf, "%d\n", val);
336 return ret;
337}
338
339static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
340{
341 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
342 int ret, val;
343
344 ret = kstrtoint(buf, 0, &val);
345 if (ret)
346 return ret;
347
348 if (val == 1)
349 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
350 else if (val == 0) {
351 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
352 smp_mb__after_atomic();
353 gfs2_glock_thaw(sdp);
354 } else {
355 return -EINVAL;
356 }
357 return len;
358}
359
360static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
361{
362 int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
363
364 return sprintf(buf, "%d\n", val);
365}
366
367static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
368{
369 int ret, val;
370
371 ret = kstrtoint(buf, 0, &val);
372 if (ret)
373 return ret;
374
375 if ((val == 1) &&
376 !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
377 complete(&sdp->sd_wdack);
378 else
379 return -EINVAL;
380 return len;
381}
382
383static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
384{
385 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
386 return sprintf(buf, "%d\n", ls->ls_first);
387}
388
389static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
390{
391 unsigned first;
392 int rv;
393
394 rv = sscanf(buf, "%u", &first);
395 if (rv != 1 || first > 1)
396 return -EINVAL;
397 rv = wait_for_completion_killable(&sdp->sd_locking_init);
398 if (rv)
399 return rv;
400 spin_lock(&sdp->sd_jindex_spin);
401 rv = -EBUSY;
402 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
403 goto out;
404 rv = -EINVAL;
405 if (sdp->sd_args.ar_spectator)
406 goto out;
407 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
408 goto out;
409 sdp->sd_lockstruct.ls_first = first;
410 rv = 0;
411out:
412 spin_unlock(&sdp->sd_jindex_spin);
413 return rv ? rv : len;
414}
415
416static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
417{
418 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
419 return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
420}
421
422int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
423{
424 struct gfs2_jdesc *jd;
425 int rv;
426
427 /* Wait for our primary journal to be initialized */
428 wait_for_completion(&sdp->sd_journal_ready);
429
430 spin_lock(&sdp->sd_jindex_spin);
431 rv = -EBUSY;
432 if (sdp->sd_jdesc->jd_jid == jid)
433 goto out;
434 rv = -ENOENT;
435 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
436 if (jd->jd_jid != jid)
437 continue;
438 rv = gfs2_recover_journal(jd, false);
439 break;
440 }
441out:
442 spin_unlock(&sdp->sd_jindex_spin);
443 return rv;
444}
445
446static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
447{
448 unsigned jid;
449 int rv;
450
451 rv = sscanf(buf, "%u", &jid);
452 if (rv != 1)
453 return -EINVAL;
454
455 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
456 rv = -ESHUTDOWN;
457 goto out;
458 }
459
460 rv = gfs2_recover_set(sdp, jid);
461out:
462 return rv ? rv : len;
463}
464
465static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
466{
467 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
468 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
469}
470
471static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
472{
473 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
474 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
475}
476
477static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
478{
479 return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
480}
481
482static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
483{
484 int jid;
485 int rv;
486
487 rv = sscanf(buf, "%d", &jid);
488 if (rv != 1)
489 return -EINVAL;
490 rv = wait_for_completion_killable(&sdp->sd_locking_init);
491 if (rv)
492 return rv;
493 spin_lock(&sdp->sd_jindex_spin);
494 rv = -EINVAL;
495 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
496 goto out;
497 rv = -EBUSY;
498 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
499 goto out;
500 rv = 0;
501 if (sdp->sd_args.ar_spectator && jid > 0)
502 rv = jid = -EINVAL;
503 sdp->sd_lockstruct.ls_jid = jid;
504 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
505 smp_mb__after_atomic();
506 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
507out:
508 spin_unlock(&sdp->sd_jindex_spin);
509 return rv ? rv : len;
510}
511
512#define GDLM_ATTR(_name,_mode,_show,_store) \
513static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
514
515GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
516GDLM_ATTR(block, 0644, block_show, block_store);
517GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store);
518GDLM_ATTR(jid, 0644, jid_show, jid_store);
519GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
520GDLM_ATTR(first_done, 0444, first_done_show, NULL);
521GDLM_ATTR(recover, 0600, NULL, recover_store);
522GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
523GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
524
525static struct attribute *lock_module_attrs[] = {
526 &gdlm_attr_proto_name.attr,
527 &gdlm_attr_block.attr,
528 &gdlm_attr_withdraw.attr,
529 &gdlm_attr_jid.attr,
530 &gdlm_attr_first.attr,
531 &gdlm_attr_first_done.attr,
532 &gdlm_attr_recover.attr,
533 &gdlm_attr_recover_done.attr,
534 &gdlm_attr_recover_status.attr,
535 NULL,
536};
537
538/*
539 * get and set struct gfs2_tune fields
540 */
541
542static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
543{
544 return snprintf(buf, PAGE_SIZE, "%u %u\n",
545 sdp->sd_tune.gt_quota_scale_num,
546 sdp->sd_tune.gt_quota_scale_den);
547}
548
549static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
550 size_t len)
551{
552 struct gfs2_tune *gt = &sdp->sd_tune;
553 unsigned int x, y;
554
555 if (!capable(CAP_SYS_ADMIN))
556 return -EPERM;
557
558 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
559 return -EINVAL;
560
561 spin_lock(>->gt_spin);
562 gt->gt_quota_scale_num = x;
563 gt->gt_quota_scale_den = y;
564 spin_unlock(>->gt_spin);
565 return len;
566}
567
568static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
569 int check_zero, const char *buf, size_t len)
570{
571 struct gfs2_tune *gt = &sdp->sd_tune;
572 unsigned int x;
573 int error;
574
575 if (!capable(CAP_SYS_ADMIN))
576 return -EPERM;
577
578 error = kstrtouint(buf, 0, &x);
579 if (error)
580 return error;
581
582 if (check_zero && !x)
583 return -EINVAL;
584
585 spin_lock(>->gt_spin);
586 *field = x;
587 spin_unlock(>->gt_spin);
588 return len;
589}
590
591#define TUNE_ATTR_3(name, show, store) \
592static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
593
594#define TUNE_ATTR_2(name, store) \
595static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
596{ \
597 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
598} \
599TUNE_ATTR_3(name, name##_show, store)
600
601#define TUNE_ATTR(name, check_zero) \
602static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
603{ \
604 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
605} \
606TUNE_ATTR_2(name, name##_store)
607
608TUNE_ATTR(quota_warn_period, 0);
609TUNE_ATTR(quota_quantum, 0);
610TUNE_ATTR(max_readahead, 0);
611TUNE_ATTR(complain_secs, 0);
612TUNE_ATTR(statfs_slow, 0);
613TUNE_ATTR(new_files_jdata, 0);
614TUNE_ATTR(statfs_quantum, 1);
615TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
616
617static struct attribute *tune_attrs[] = {
618 &tune_attr_quota_warn_period.attr,
619 &tune_attr_quota_quantum.attr,
620 &tune_attr_max_readahead.attr,
621 &tune_attr_complain_secs.attr,
622 &tune_attr_statfs_slow.attr,
623 &tune_attr_statfs_quantum.attr,
624 &tune_attr_quota_scale.attr,
625 &tune_attr_new_files_jdata.attr,
626 NULL,
627};
628
629static const struct attribute_group tune_group = {
630 .name = "tune",
631 .attrs = tune_attrs,
632};
633
634static const struct attribute_group lock_module_group = {
635 .name = "lock_module",
636 .attrs = lock_module_attrs,
637};
638
639int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
640{
641 struct super_block *sb = sdp->sd_vfs;
642 int error;
643 char ro[20];
644 char spectator[20];
645 char *envp[] = { ro, spectator, NULL };
646 int sysfs_frees_sdp = 0;
647
648 sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
649 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
650
651 sdp->sd_kobj.kset = gfs2_kset;
652 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
653 "%s", sdp->sd_table_name);
654 if (error)
655 goto fail_reg;
656
657 sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling
658 function gfs2_sbd_release. */
659 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
660 if (error)
661 goto fail_reg;
662
663 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
664 if (error)
665 goto fail_tune;
666
667 error = sysfs_create_link(&sdp->sd_kobj,
668 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
669 "device");
670 if (error)
671 goto fail_lock_module;
672
673 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
674 return 0;
675
676fail_lock_module:
677 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
678fail_tune:
679 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
680fail_reg:
681 free_percpu(sdp->sd_lkstats);
682 fs_err(sdp, "error %d adding sysfs files\n", error);
683 if (sysfs_frees_sdp)
684 kobject_put(&sdp->sd_kobj);
685 else
686 kfree(sdp);
687 sb->s_fs_info = NULL;
688 return error;
689}
690
691void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
692{
693 sysfs_remove_link(&sdp->sd_kobj, "device");
694 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
695 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
696 kobject_put(&sdp->sd_kobj);
697}
698
699static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
700 struct kobj_uevent_env *env)
701{
702 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
703 struct super_block *s = sdp->sd_vfs;
704
705 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
706 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
707 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
708 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
709 if (!uuid_is_null(&s->s_uuid))
710 add_uevent_var(env, "UUID=%pUB", &s->s_uuid);
711 return 0;
712}
713
714static const struct kset_uevent_ops gfs2_uevent_ops = {
715 .uevent = gfs2_uevent,
716};
717
718int gfs2_sys_init(void)
719{
720 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
721 if (!gfs2_kset)
722 return -ENOMEM;
723 return 0;
724}
725
726void gfs2_sys_uninit(void)
727{
728 kset_unregister(gfs2_kset);
729}
730
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
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 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/sched.h>
13#include <linux/spinlock.h>
14#include <linux/completion.h>
15#include <linux/buffer_head.h>
16#include <linux/module.h>
17#include <linux/kobject.h>
18#include <asm/uaccess.h>
19#include <linux/gfs2_ondisk.h>
20#include <linux/genhd.h>
21
22#include "gfs2.h"
23#include "incore.h"
24#include "sys.h"
25#include "super.h"
26#include "glock.h"
27#include "quota.h"
28#include "util.h"
29#include "glops.h"
30#include "recovery.h"
31
32struct gfs2_attr {
33 struct attribute attr;
34 ssize_t (*show)(struct gfs2_sbd *, char *);
35 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
36};
37
38static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
39 char *buf)
40{
41 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
42 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
43 return a->show ? a->show(sdp, buf) : 0;
44}
45
46static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
47 const char *buf, size_t len)
48{
49 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
50 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
51 return a->store ? a->store(sdp, buf, len) : len;
52}
53
54static const struct sysfs_ops gfs2_attr_ops = {
55 .show = gfs2_attr_show,
56 .store = gfs2_attr_store,
57};
58
59
60static struct kset *gfs2_kset;
61
62static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
63{
64 return snprintf(buf, PAGE_SIZE, "%u:%u\n",
65 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
66}
67
68static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
69{
70 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
71}
72
73static int gfs2_uuid_valid(const u8 *uuid)
74{
75 int i;
76
77 for (i = 0; i < 16; i++) {
78 if (uuid[i])
79 return 1;
80 }
81 return 0;
82}
83
84static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
85{
86 struct super_block *s = sdp->sd_vfs;
87 const u8 *uuid = s->s_uuid;
88 buf[0] = '\0';
89 if (!gfs2_uuid_valid(uuid))
90 return 0;
91 return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
92}
93
94static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
95{
96 struct super_block *sb = sdp->sd_vfs;
97 int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
98
99 return snprintf(buf, PAGE_SIZE, "%d\n", frozen);
100}
101
102static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
103{
104 int error, n;
105
106 error = kstrtoint(buf, 0, &n);
107 if (error)
108 return error;
109
110 if (!capable(CAP_SYS_ADMIN))
111 return -EPERM;
112
113 switch (n) {
114 case 0:
115 error = thaw_super(sdp->sd_vfs);
116 break;
117 case 1:
118 error = freeze_super(sdp->sd_vfs);
119 break;
120 default:
121 return -EINVAL;
122 }
123
124 if (error) {
125 fs_warn(sdp, "freeze %d error %d", n, error);
126 return error;
127 }
128
129 return len;
130}
131
132static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
133{
134 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
135 return snprintf(buf, PAGE_SIZE, "%u\n", b);
136}
137
138static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
139{
140 int error, val;
141
142 if (!capable(CAP_SYS_ADMIN))
143 return -EPERM;
144
145 error = kstrtoint(buf, 0, &val);
146 if (error)
147 return error;
148
149 if (val != 1)
150 return -EINVAL;
151
152 gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n");
153
154 return len;
155}
156
157static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
158 size_t len)
159{
160 int error, val;
161
162 if (!capable(CAP_SYS_ADMIN))
163 return -EPERM;
164
165 error = kstrtoint(buf, 0, &val);
166 if (error)
167 return error;
168
169 if (val != 1)
170 return -EINVAL;
171
172 gfs2_statfs_sync(sdp->sd_vfs, 0);
173 return len;
174}
175
176static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
177 size_t len)
178{
179 int error, val;
180
181 if (!capable(CAP_SYS_ADMIN))
182 return -EPERM;
183
184 error = kstrtoint(buf, 0, &val);
185 if (error)
186 return error;
187
188 if (val != 1)
189 return -EINVAL;
190
191 gfs2_quota_sync(sdp->sd_vfs, 0);
192 return len;
193}
194
195static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
196 size_t len)
197{
198 struct kqid qid;
199 int error;
200 u32 id;
201
202 if (!capable(CAP_SYS_ADMIN))
203 return -EPERM;
204
205 error = kstrtou32(buf, 0, &id);
206 if (error)
207 return error;
208
209 qid = make_kqid(current_user_ns(), USRQUOTA, id);
210 if (!qid_valid(qid))
211 return -EINVAL;
212
213 error = gfs2_quota_refresh(sdp, qid);
214 return error ? error : len;
215}
216
217static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
218 size_t len)
219{
220 struct kqid qid;
221 int error;
222 u32 id;
223
224 if (!capable(CAP_SYS_ADMIN))
225 return -EPERM;
226
227 error = kstrtou32(buf, 0, &id);
228 if (error)
229 return error;
230
231 qid = make_kqid(current_user_ns(), GRPQUOTA, id);
232 if (!qid_valid(qid))
233 return -EINVAL;
234
235 error = gfs2_quota_refresh(sdp, qid);
236 return error ? error : len;
237}
238
239static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
240{
241 struct gfs2_glock *gl;
242 const struct gfs2_glock_operations *glops;
243 unsigned int glmode;
244 unsigned int gltype;
245 unsigned long long glnum;
246 char mode[16];
247 int rv;
248
249 if (!capable(CAP_SYS_ADMIN))
250 return -EPERM;
251
252 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
253 mode);
254 if (rv != 3)
255 return -EINVAL;
256
257 if (strcmp(mode, "EX") == 0)
258 glmode = LM_ST_UNLOCKED;
259 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
260 glmode = LM_ST_DEFERRED;
261 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
262 glmode = LM_ST_SHARED;
263 else
264 return -EINVAL;
265
266 if (gltype > LM_TYPE_JOURNAL)
267 return -EINVAL;
268 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
269 glops = &gfs2_freeze_glops;
270 else
271 glops = gfs2_glops_list[gltype];
272 if (glops == NULL)
273 return -EINVAL;
274 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
275 fs_info(sdp, "demote interface used\n");
276 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
277 if (rv)
278 return rv;
279 gfs2_glock_cb(gl, glmode);
280 gfs2_glock_put(gl);
281 return len;
282}
283
284
285#define GFS2_ATTR(name, mode, show, store) \
286static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
287
288GFS2_ATTR(id, 0444, id_show, NULL);
289GFS2_ATTR(fsname, 0444, fsname_show, NULL);
290GFS2_ATTR(uuid, 0444, uuid_show, NULL);
291GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
292GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
293GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
294GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
295GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
296GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
297GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
298
299static struct attribute *gfs2_attrs[] = {
300 &gfs2_attr_id.attr,
301 &gfs2_attr_fsname.attr,
302 &gfs2_attr_uuid.attr,
303 &gfs2_attr_freeze.attr,
304 &gfs2_attr_withdraw.attr,
305 &gfs2_attr_statfs_sync.attr,
306 &gfs2_attr_quota_sync.attr,
307 &gfs2_attr_quota_refresh_user.attr,
308 &gfs2_attr_quota_refresh_group.attr,
309 &gfs2_attr_demote_rq.attr,
310 NULL,
311};
312
313static void gfs2_sbd_release(struct kobject *kobj)
314{
315 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
316
317 kfree(sdp);
318}
319
320static struct kobj_type gfs2_ktype = {
321 .release = gfs2_sbd_release,
322 .default_attrs = gfs2_attrs,
323 .sysfs_ops = &gfs2_attr_ops,
324};
325
326
327/*
328 * lock_module. Originally from lock_dlm
329 */
330
331static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
332{
333 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
334 return sprintf(buf, "%s\n", ops->lm_proto_name);
335}
336
337static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
338{
339 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
340 ssize_t ret;
341 int val = 0;
342
343 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
344 val = 1;
345 ret = sprintf(buf, "%d\n", val);
346 return ret;
347}
348
349static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
350{
351 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
352 int ret, val;
353
354 ret = kstrtoint(buf, 0, &val);
355 if (ret)
356 return ret;
357
358 if (val == 1)
359 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
360 else if (val == 0) {
361 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
362 smp_mb__after_atomic();
363 gfs2_glock_thaw(sdp);
364 } else {
365 return -EINVAL;
366 }
367 return len;
368}
369
370static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
371{
372 int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
373
374 return sprintf(buf, "%d\n", val);
375}
376
377static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
378{
379 int ret, val;
380
381 ret = kstrtoint(buf, 0, &val);
382 if (ret)
383 return ret;
384
385 if ((val == 1) &&
386 !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
387 complete(&sdp->sd_wdack);
388 else
389 return -EINVAL;
390 return len;
391}
392
393static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
394{
395 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
396 return sprintf(buf, "%d\n", ls->ls_first);
397}
398
399static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
400{
401 unsigned first;
402 int rv;
403
404 rv = sscanf(buf, "%u", &first);
405 if (rv != 1 || first > 1)
406 return -EINVAL;
407 rv = wait_for_completion_killable(&sdp->sd_locking_init);
408 if (rv)
409 return rv;
410 spin_lock(&sdp->sd_jindex_spin);
411 rv = -EBUSY;
412 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
413 goto out;
414 rv = -EINVAL;
415 if (sdp->sd_args.ar_spectator)
416 goto out;
417 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
418 goto out;
419 sdp->sd_lockstruct.ls_first = first;
420 rv = 0;
421out:
422 spin_unlock(&sdp->sd_jindex_spin);
423 return rv ? rv : len;
424}
425
426static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
427{
428 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
429 return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
430}
431
432int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
433{
434 struct gfs2_jdesc *jd;
435 int rv;
436
437 /* Wait for our primary journal to be initialized */
438 wait_for_completion(&sdp->sd_journal_ready);
439
440 spin_lock(&sdp->sd_jindex_spin);
441 rv = -EBUSY;
442 if (sdp->sd_jdesc->jd_jid == jid)
443 goto out;
444 rv = -ENOENT;
445 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
446 if (jd->jd_jid != jid)
447 continue;
448 rv = gfs2_recover_journal(jd, false);
449 break;
450 }
451out:
452 spin_unlock(&sdp->sd_jindex_spin);
453 return rv;
454}
455
456static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
457{
458 unsigned jid;
459 int rv;
460
461 rv = sscanf(buf, "%u", &jid);
462 if (rv != 1)
463 return -EINVAL;
464
465 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
466 rv = -ESHUTDOWN;
467 goto out;
468 }
469
470 rv = gfs2_recover_set(sdp, jid);
471out:
472 return rv ? rv : len;
473}
474
475static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
476{
477 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
478 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
479}
480
481static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
482{
483 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
484 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
485}
486
487static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
488{
489 return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
490}
491
492static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
493{
494 int jid;
495 int rv;
496
497 rv = sscanf(buf, "%d", &jid);
498 if (rv != 1)
499 return -EINVAL;
500 rv = wait_for_completion_killable(&sdp->sd_locking_init);
501 if (rv)
502 return rv;
503 spin_lock(&sdp->sd_jindex_spin);
504 rv = -EINVAL;
505 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
506 goto out;
507 rv = -EBUSY;
508 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
509 goto out;
510 rv = 0;
511 if (sdp->sd_args.ar_spectator && jid > 0)
512 rv = jid = -EINVAL;
513 sdp->sd_lockstruct.ls_jid = jid;
514 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
515 smp_mb__after_atomic();
516 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
517out:
518 spin_unlock(&sdp->sd_jindex_spin);
519 return rv ? rv : len;
520}
521
522#define GDLM_ATTR(_name,_mode,_show,_store) \
523static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
524
525GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
526GDLM_ATTR(block, 0644, block_show, block_store);
527GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store);
528GDLM_ATTR(jid, 0644, jid_show, jid_store);
529GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
530GDLM_ATTR(first_done, 0444, first_done_show, NULL);
531GDLM_ATTR(recover, 0600, NULL, recover_store);
532GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
533GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
534
535static struct attribute *lock_module_attrs[] = {
536 &gdlm_attr_proto_name.attr,
537 &gdlm_attr_block.attr,
538 &gdlm_attr_withdraw.attr,
539 &gdlm_attr_jid.attr,
540 &gdlm_attr_first.attr,
541 &gdlm_attr_first_done.attr,
542 &gdlm_attr_recover.attr,
543 &gdlm_attr_recover_done.attr,
544 &gdlm_attr_recover_status.attr,
545 NULL,
546};
547
548/*
549 * get and set struct gfs2_tune fields
550 */
551
552static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
553{
554 return snprintf(buf, PAGE_SIZE, "%u %u\n",
555 sdp->sd_tune.gt_quota_scale_num,
556 sdp->sd_tune.gt_quota_scale_den);
557}
558
559static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
560 size_t len)
561{
562 struct gfs2_tune *gt = &sdp->sd_tune;
563 unsigned int x, y;
564
565 if (!capable(CAP_SYS_ADMIN))
566 return -EPERM;
567
568 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
569 return -EINVAL;
570
571 spin_lock(>->gt_spin);
572 gt->gt_quota_scale_num = x;
573 gt->gt_quota_scale_den = y;
574 spin_unlock(>->gt_spin);
575 return len;
576}
577
578static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
579 int check_zero, const char *buf, size_t len)
580{
581 struct gfs2_tune *gt = &sdp->sd_tune;
582 unsigned int x;
583 int error;
584
585 if (!capable(CAP_SYS_ADMIN))
586 return -EPERM;
587
588 error = kstrtouint(buf, 0, &x);
589 if (error)
590 return error;
591
592 if (check_zero && !x)
593 return -EINVAL;
594
595 spin_lock(>->gt_spin);
596 *field = x;
597 spin_unlock(>->gt_spin);
598 return len;
599}
600
601#define TUNE_ATTR_3(name, show, store) \
602static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
603
604#define TUNE_ATTR_2(name, store) \
605static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
606{ \
607 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
608} \
609TUNE_ATTR_3(name, name##_show, store)
610
611#define TUNE_ATTR(name, check_zero) \
612static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
613{ \
614 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
615} \
616TUNE_ATTR_2(name, name##_store)
617
618TUNE_ATTR(quota_warn_period, 0);
619TUNE_ATTR(quota_quantum, 0);
620TUNE_ATTR(max_readahead, 0);
621TUNE_ATTR(complain_secs, 0);
622TUNE_ATTR(statfs_slow, 0);
623TUNE_ATTR(new_files_jdata, 0);
624TUNE_ATTR(statfs_quantum, 1);
625TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
626
627static struct attribute *tune_attrs[] = {
628 &tune_attr_quota_warn_period.attr,
629 &tune_attr_quota_quantum.attr,
630 &tune_attr_max_readahead.attr,
631 &tune_attr_complain_secs.attr,
632 &tune_attr_statfs_slow.attr,
633 &tune_attr_statfs_quantum.attr,
634 &tune_attr_quota_scale.attr,
635 &tune_attr_new_files_jdata.attr,
636 NULL,
637};
638
639static struct attribute_group tune_group = {
640 .name = "tune",
641 .attrs = tune_attrs,
642};
643
644static struct attribute_group lock_module_group = {
645 .name = "lock_module",
646 .attrs = lock_module_attrs,
647};
648
649int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
650{
651 struct super_block *sb = sdp->sd_vfs;
652 int error;
653 char ro[20];
654 char spectator[20];
655 char *envp[] = { ro, spectator, NULL };
656 int sysfs_frees_sdp = 0;
657
658 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
659 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
660
661 sdp->sd_kobj.kset = gfs2_kset;
662 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
663 "%s", sdp->sd_table_name);
664 if (error)
665 goto fail_reg;
666
667 sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling
668 function gfs2_sbd_release. */
669 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
670 if (error)
671 goto fail_reg;
672
673 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
674 if (error)
675 goto fail_tune;
676
677 error = sysfs_create_link(&sdp->sd_kobj,
678 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
679 "device");
680 if (error)
681 goto fail_lock_module;
682
683 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
684 return 0;
685
686fail_lock_module:
687 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
688fail_tune:
689 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
690fail_reg:
691 free_percpu(sdp->sd_lkstats);
692 fs_err(sdp, "error %d adding sysfs files", error);
693 if (sysfs_frees_sdp)
694 kobject_put(&sdp->sd_kobj);
695 else
696 kfree(sdp);
697 sb->s_fs_info = NULL;
698 return error;
699}
700
701void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
702{
703 sysfs_remove_link(&sdp->sd_kobj, "device");
704 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
705 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
706 kobject_put(&sdp->sd_kobj);
707}
708
709static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
710 struct kobj_uevent_env *env)
711{
712 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
713 struct super_block *s = sdp->sd_vfs;
714 const u8 *uuid = s->s_uuid;
715
716 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
717 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
718 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
719 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
720 if (gfs2_uuid_valid(uuid))
721 add_uevent_var(env, "UUID=%pUB", uuid);
722 return 0;
723}
724
725static const struct kset_uevent_ops gfs2_uevent_ops = {
726 .uevent = gfs2_uevent,
727};
728
729int gfs2_sys_init(void)
730{
731 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
732 if (!gfs2_kset)
733 return -ENOMEM;
734 return 0;
735}
736
737void gfs2_sys_uninit(void)
738{
739 kset_unregister(gfs2_kset);
740}
741