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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 */
6
7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9#include <linux/sched.h>
10#include <linux/cred.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 <linux/uaccess.h>
17#include <linux/gfs2_ondisk.h>
18#include <linux/blkdev.h>
19
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"
29
30struct 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);
34};
35
36static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
37 char *buf)
38{
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;
42}
43
44static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
45 const char *buf, size_t len)
46{
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;
50}
51
52static const struct sysfs_ops gfs2_attr_ops = {
53 .show = gfs2_attr_show,
54 .store = gfs2_attr_store,
55};
56
57
58static struct kset *gfs2_kset;
59
60static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
61{
62 return sysfs_emit(buf, "%u:%u\n",
63 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
64}
65
66static ssize_t status_show(struct gfs2_sbd *sdp, char *buf)
67{
68 unsigned long f = sdp->sd_flags;
69 ssize_t s;
70
71 s = sysfs_emit(buf,
72 "Journal Checked: %d\n"
73 "Journal Live: %d\n"
74 "Journal ID: %d\n"
75 "Spectator: %d\n"
76 "Withdrawn: %d\n"
77 "No barriers: %d\n"
78 "No recovery: %d\n"
79 "Demote: %d\n"
80 "No Journal ID: %d\n"
81 "Mounted RO: %d\n"
82 "RO Recovery: %d\n"
83 "Force AIL Flush: %d\n"
84 "FS Freeze Initiator: %d\n"
85 "FS Frozen: %d\n"
86 "Killing: %d\n"
87 "sd_log_error: %d\n"
88 "sd_log_flush_lock: %d\n"
89 "sd_log_num_revoke: %u\n"
90 "sd_log_in_flight: %d\n"
91 "sd_log_blks_needed: %d\n"
92 "sd_log_blks_free: %d\n"
93 "sd_log_flush_head: %d\n"
94 "sd_log_flush_tail: %d\n"
95 "sd_log_blks_reserved: %d\n"
96 "sd_log_revokes_available: %d\n"
97 "sd_log_pinned: %d\n"
98 "sd_log_thresh1: %d\n"
99 "sd_log_thresh2: %d\n",
100 test_bit(SDF_JOURNAL_CHECKED, &f),
101 test_bit(SDF_JOURNAL_LIVE, &f),
102 (sdp->sd_jdesc ? sdp->sd_jdesc->jd_jid : 0),
103 (sdp->sd_args.ar_spectator ? 1 : 0),
104 test_bit(SDF_WITHDRAWN, &f),
105 test_bit(SDF_NOBARRIERS, &f),
106 test_bit(SDF_NORECOVERY, &f),
107 test_bit(SDF_DEMOTE, &f),
108 test_bit(SDF_NOJOURNALID, &f),
109 (sb_rdonly(sdp->sd_vfs) ? 1 : 0),
110 test_bit(SDF_RORECOVERY, &f),
111 test_bit(SDF_FORCE_AIL_FLUSH, &f),
112 test_bit(SDF_FREEZE_INITIATOR, &f),
113 test_bit(SDF_FROZEN, &f),
114 test_bit(SDF_KILL, &f),
115 sdp->sd_log_error,
116 rwsem_is_locked(&sdp->sd_log_flush_lock),
117 sdp->sd_log_num_revoke,
118 atomic_read(&sdp->sd_log_in_flight),
119 atomic_read(&sdp->sd_log_blks_needed),
120 atomic_read(&sdp->sd_log_blks_free),
121 sdp->sd_log_flush_head,
122 sdp->sd_log_flush_tail,
123 sdp->sd_log_blks_reserved,
124 atomic_read(&sdp->sd_log_revokes_available),
125 atomic_read(&sdp->sd_log_pinned),
126 atomic_read(&sdp->sd_log_thresh1),
127 atomic_read(&sdp->sd_log_thresh2));
128 return s;
129}
130
131static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
132{
133 return sysfs_emit(buf, "%s\n", sdp->sd_fsname);
134}
135
136static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
137{
138 struct super_block *s = sdp->sd_vfs;
139
140 buf[0] = '\0';
141 if (uuid_is_null(&s->s_uuid))
142 return 0;
143 return sysfs_emit(buf, "%pUB\n", &s->s_uuid);
144}
145
146static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
147{
148 struct super_block *sb = sdp->sd_vfs;
149 int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
150
151 return sysfs_emit(buf, "%d\n", frozen);
152}
153
154static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
155{
156 int error, n;
157
158 error = kstrtoint(buf, 0, &n);
159 if (error)
160 return error;
161
162 if (!capable(CAP_SYS_ADMIN))
163 return -EPERM;
164
165 switch (n) {
166 case 0:
167 error = thaw_super(sdp->sd_vfs, FREEZE_HOLDER_USERSPACE, NULL);
168 break;
169 case 1:
170 error = freeze_super(sdp->sd_vfs, FREEZE_HOLDER_USERSPACE, NULL);
171 break;
172 default:
173 return -EINVAL;
174 }
175
176 if (error) {
177 fs_warn(sdp, "freeze %d error %d\n", n, error);
178 return error;
179 }
180
181 return len;
182}
183
184static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
185{
186 unsigned int b = gfs2_withdrawn(sdp);
187 return sysfs_emit(buf, "%u\n", b);
188}
189
190static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
191{
192 int error, val;
193
194 if (!capable(CAP_SYS_ADMIN))
195 return -EPERM;
196
197 error = kstrtoint(buf, 0, &val);
198 if (error)
199 return error;
200
201 if (val != 1)
202 return -EINVAL;
203
204 gfs2_lm(sdp, "withdrawing from cluster at user's request\n");
205 gfs2_withdraw(sdp);
206
207 return len;
208}
209
210static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
211 size_t len)
212{
213 int error, val;
214
215 if (!capable(CAP_SYS_ADMIN))
216 return -EPERM;
217
218 error = kstrtoint(buf, 0, &val);
219 if (error)
220 return error;
221
222 if (val != 1)
223 return -EINVAL;
224
225 gfs2_statfs_sync(sdp->sd_vfs, 0);
226 return len;
227}
228
229static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
230 size_t len)
231{
232 int error, val;
233
234 if (!capable(CAP_SYS_ADMIN))
235 return -EPERM;
236
237 error = kstrtoint(buf, 0, &val);
238 if (error)
239 return error;
240
241 if (val != 1)
242 return -EINVAL;
243
244 gfs2_quota_sync(sdp->sd_vfs, 0);
245 return len;
246}
247
248static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
249 size_t len)
250{
251 struct kqid qid;
252 int error;
253 u32 id;
254
255 if (!capable(CAP_SYS_ADMIN))
256 return -EPERM;
257
258 error = kstrtou32(buf, 0, &id);
259 if (error)
260 return error;
261
262 qid = make_kqid(current_user_ns(), USRQUOTA, id);
263 if (!qid_valid(qid))
264 return -EINVAL;
265
266 error = gfs2_quota_refresh(sdp, qid);
267 return error ? error : len;
268}
269
270static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
271 size_t len)
272{
273 struct kqid qid;
274 int error;
275 u32 id;
276
277 if (!capable(CAP_SYS_ADMIN))
278 return -EPERM;
279
280 error = kstrtou32(buf, 0, &id);
281 if (error)
282 return error;
283
284 qid = make_kqid(current_user_ns(), GRPQUOTA, id);
285 if (!qid_valid(qid))
286 return -EINVAL;
287
288 error = gfs2_quota_refresh(sdp, qid);
289 return error ? error : len;
290}
291
292static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
293{
294 struct gfs2_glock *gl;
295 const struct gfs2_glock_operations *glops;
296 unsigned int glmode;
297 unsigned int gltype;
298 unsigned long long glnum;
299 char mode[16];
300 int rv;
301
302 if (!capable(CAP_SYS_ADMIN))
303 return -EPERM;
304
305 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
306 mode);
307 if (rv != 3)
308 return -EINVAL;
309
310 if (strcmp(mode, "EX") == 0)
311 glmode = LM_ST_UNLOCKED;
312 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
313 glmode = LM_ST_DEFERRED;
314 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
315 glmode = LM_ST_SHARED;
316 else
317 return -EINVAL;
318
319 if (gltype > LM_TYPE_JOURNAL)
320 return -EINVAL;
321 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
322 glops = &gfs2_freeze_glops;
323 else
324 glops = gfs2_glops_list[gltype];
325 if (glops == NULL)
326 return -EINVAL;
327 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
328 fs_info(sdp, "demote interface used\n");
329 rv = gfs2_glock_get(sdp, glnum, glops, NO_CREATE, &gl);
330 if (rv)
331 return rv;
332 gfs2_glock_cb(gl, glmode);
333 gfs2_glock_put(gl);
334 return len;
335}
336
337
338#define GFS2_ATTR(name, mode, show, store) \
339static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
340
341GFS2_ATTR(id, 0444, id_show, NULL);
342GFS2_ATTR(fsname, 0444, fsname_show, NULL);
343GFS2_ATTR(uuid, 0444, uuid_show, NULL);
344GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
345GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
346GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
347GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
348GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
349GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
350GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
351GFS2_ATTR(status, 0400, status_show, NULL);
352
353static struct attribute *gfs2_attrs[] = {
354 &gfs2_attr_id.attr,
355 &gfs2_attr_fsname.attr,
356 &gfs2_attr_uuid.attr,
357 &gfs2_attr_freeze.attr,
358 &gfs2_attr_withdraw.attr,
359 &gfs2_attr_statfs_sync.attr,
360 &gfs2_attr_quota_sync.attr,
361 &gfs2_attr_quota_refresh_user.attr,
362 &gfs2_attr_quota_refresh_group.attr,
363 &gfs2_attr_demote_rq.attr,
364 &gfs2_attr_status.attr,
365 NULL,
366};
367ATTRIBUTE_GROUPS(gfs2);
368
369static void gfs2_sbd_release(struct kobject *kobj)
370{
371 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
372
373 complete(&sdp->sd_kobj_unregister);
374}
375
376static struct kobj_type gfs2_ktype = {
377 .release = gfs2_sbd_release,
378 .default_groups = gfs2_groups,
379 .sysfs_ops = &gfs2_attr_ops,
380};
381
382
383/*
384 * lock_module. Originally from lock_dlm
385 */
386
387static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
388{
389 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
390 return sysfs_emit(buf, "%s\n", ops->lm_proto_name);
391}
392
393static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
394{
395 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
396 ssize_t ret;
397 int val = 0;
398
399 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
400 val = 1;
401 ret = sysfs_emit(buf, "%d\n", val);
402 return ret;
403}
404
405static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
406{
407 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
408 int ret, val;
409
410 ret = kstrtoint(buf, 0, &val);
411 if (ret)
412 return ret;
413
414 if (val == 1)
415 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
416 else if (val == 0) {
417 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
418 smp_mb__after_atomic();
419 gfs2_glock_thaw(sdp);
420 } else {
421 return -EINVAL;
422 }
423 return len;
424}
425
426static ssize_t withdraw_helper_status_store(struct gfs2_sbd *sdp,
427 const char *buf,
428 size_t len)
429{
430 int ret, val;
431
432 ret = kstrtoint(buf, 0, &val);
433 if (ret)
434 return ret;
435 if (val < 0 || val > 1)
436 return -EINVAL;
437
438 sdp->sd_withdraw_helper_status = val;
439 complete(&sdp->sd_withdraw_helper);
440 return len;
441}
442
443static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
444{
445 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
446 return sysfs_emit(buf, "%d\n", ls->ls_first);
447}
448
449static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
450{
451 unsigned first;
452 int rv;
453
454 rv = sscanf(buf, "%u", &first);
455 if (rv != 1 || first > 1)
456 return -EINVAL;
457 rv = wait_for_completion_killable(&sdp->sd_locking_init);
458 if (rv)
459 return rv;
460 spin_lock(&sdp->sd_jindex_spin);
461 rv = -EBUSY;
462 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
463 goto out;
464 rv = -EINVAL;
465 if (sdp->sd_args.ar_spectator)
466 goto out;
467 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
468 goto out;
469 sdp->sd_lockstruct.ls_first = first;
470 rv = 0;
471out:
472 spin_unlock(&sdp->sd_jindex_spin);
473 return rv ? rv : len;
474}
475
476static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
477{
478 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
479 return sysfs_emit(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
480}
481
482int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
483{
484 struct gfs2_jdesc *jd;
485 int rv;
486
487 /* Wait for our primary journal to be initialized */
488 wait_for_completion(&sdp->sd_journal_ready);
489
490 spin_lock(&sdp->sd_jindex_spin);
491 rv = -EBUSY;
492 /**
493 * If we're a spectator, we use journal0, but it's not really ours.
494 * So we need to wait for its recovery too. If we skip it we'd never
495 * queue work to the recovery workqueue, and so its completion would
496 * never clear the DFL_BLOCK_LOCKS flag, so all our locks would
497 * permanently stop working.
498 */
499 if (!sdp->sd_jdesc)
500 goto out;
501 if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator)
502 goto out;
503 rv = -ENOENT;
504 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
505 if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator)
506 continue;
507 rv = gfs2_recover_journal(jd, false);
508 break;
509 }
510out:
511 spin_unlock(&sdp->sd_jindex_spin);
512 return rv;
513}
514
515static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
516{
517 unsigned jid;
518 int rv;
519
520 rv = sscanf(buf, "%u", &jid);
521 if (rv != 1)
522 return -EINVAL;
523
524 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
525 rv = -ESHUTDOWN;
526 goto out;
527 }
528
529 rv = gfs2_recover_set(sdp, jid);
530out:
531 return rv ? rv : len;
532}
533
534static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
535{
536 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
537 return sysfs_emit(buf, "%d\n", ls->ls_recover_jid_done);
538}
539
540static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
541{
542 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
543 return sysfs_emit(buf, "%d\n", ls->ls_recover_jid_status);
544}
545
546static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
547{
548 return sysfs_emit(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
549}
550
551static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
552{
553 int jid;
554 int rv;
555
556 rv = sscanf(buf, "%d", &jid);
557 if (rv != 1)
558 return -EINVAL;
559 rv = wait_for_completion_killable(&sdp->sd_locking_init);
560 if (rv)
561 return rv;
562 spin_lock(&sdp->sd_jindex_spin);
563 rv = -EINVAL;
564 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
565 goto out;
566 rv = -EBUSY;
567 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
568 goto out;
569 rv = 0;
570 if (sdp->sd_args.ar_spectator && jid > 0)
571 rv = jid = -EINVAL;
572 sdp->sd_lockstruct.ls_jid = jid;
573 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
574 smp_mb__after_atomic();
575 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
576out:
577 spin_unlock(&sdp->sd_jindex_spin);
578 return rv ? rv : len;
579}
580
581#define GDLM_ATTR(_name,_mode,_show,_store) \
582static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
583
584GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
585GDLM_ATTR(block, 0644, block_show, block_store);
586GDLM_ATTR(withdraw, 0200, NULL, withdraw_helper_status_store);
587GDLM_ATTR(jid, 0644, jid_show, jid_store);
588GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
589GDLM_ATTR(first_done, 0444, first_done_show, NULL);
590GDLM_ATTR(recover, 0600, NULL, recover_store);
591GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
592GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
593
594static struct attribute *lock_module_attrs[] = {
595 &gdlm_attr_proto_name.attr,
596 &gdlm_attr_block.attr,
597 &gdlm_attr_withdraw.attr,
598 &gdlm_attr_jid.attr,
599 &gdlm_attr_first.attr,
600 &gdlm_attr_first_done.attr,
601 &gdlm_attr_recover.attr,
602 &gdlm_attr_recover_done.attr,
603 &gdlm_attr_recover_status.attr,
604 NULL,
605};
606
607/*
608 * get and set struct gfs2_tune fields
609 */
610
611static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
612{
613 return sysfs_emit(buf, "%u %u\n",
614 sdp->sd_tune.gt_quota_scale_num,
615 sdp->sd_tune.gt_quota_scale_den);
616}
617
618static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
619 size_t len)
620{
621 struct gfs2_tune *gt = &sdp->sd_tune;
622 unsigned int x, y;
623
624 if (!capable(CAP_SYS_ADMIN))
625 return -EPERM;
626
627 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
628 return -EINVAL;
629
630 spin_lock(&gt->gt_spin);
631 gt->gt_quota_scale_num = x;
632 gt->gt_quota_scale_den = y;
633 spin_unlock(&gt->gt_spin);
634 return len;
635}
636
637static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
638 int check_zero, const char *buf, size_t len)
639{
640 struct gfs2_tune *gt = &sdp->sd_tune;
641 unsigned int x;
642 int error;
643
644 if (!capable(CAP_SYS_ADMIN))
645 return -EPERM;
646
647 error = kstrtouint(buf, 0, &x);
648 if (error)
649 return error;
650
651 if (check_zero && !x)
652 return -EINVAL;
653
654 spin_lock(&gt->gt_spin);
655 *field = x;
656 spin_unlock(&gt->gt_spin);
657 return len;
658}
659
660#define TUNE_ATTR_3(name, show, store) \
661static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
662
663#define TUNE_ATTR_2(name, store) \
664static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
665{ \
666 return sysfs_emit(buf, "%u\n", sdp->sd_tune.gt_##name); \
667} \
668TUNE_ATTR_3(name, name##_show, store)
669
670#define TUNE_ATTR(name, check_zero) \
671static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
672{ \
673 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
674} \
675TUNE_ATTR_2(name, name##_store)
676
677TUNE_ATTR(quota_warn_period, 0);
678TUNE_ATTR(quota_quantum, 0);
679TUNE_ATTR(max_readahead, 0);
680TUNE_ATTR(complain_secs, 0);
681TUNE_ATTR(statfs_slow, 0);
682TUNE_ATTR(new_files_jdata, 0);
683TUNE_ATTR(statfs_quantum, 1);
684TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
685TUNE_ATTR(withdraw_helper_timeout, 1);
686
687static struct attribute *tune_attrs[] = {
688 &tune_attr_quota_warn_period.attr,
689 &tune_attr_quota_quantum.attr,
690 &tune_attr_max_readahead.attr,
691 &tune_attr_complain_secs.attr,
692 &tune_attr_statfs_slow.attr,
693 &tune_attr_statfs_quantum.attr,
694 &tune_attr_quota_scale.attr,
695 &tune_attr_new_files_jdata.attr,
696 &tune_attr_withdraw_helper_timeout.attr,
697 NULL,
698};
699
700static const struct attribute_group tune_group = {
701 .name = "tune",
702 .attrs = tune_attrs,
703};
704
705static const struct attribute_group lock_module_group = {
706 .name = "lock_module",
707 .attrs = lock_module_attrs,
708};
709
710int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
711{
712 struct super_block *sb = sdp->sd_vfs;
713 int error;
714 char ro[20];
715 char spectator[20];
716 char *envp[] = { ro, spectator, NULL };
717
718 sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
719 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
720
721 init_completion(&sdp->sd_kobj_unregister);
722 sdp->sd_kobj.kset = gfs2_kset;
723 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
724 "%s", sdp->sd_table_name);
725 if (error)
726 goto fail_reg;
727
728 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
729 if (error)
730 goto fail_reg;
731
732 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
733 if (error)
734 goto fail_tune;
735
736 error = sysfs_create_link(&sdp->sd_kobj,
737 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
738 "device");
739 if (error)
740 goto fail_lock_module;
741
742 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
743 return 0;
744
745fail_lock_module:
746 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
747fail_tune:
748 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
749fail_reg:
750 fs_err(sdp, "error %d adding sysfs files\n", error);
751 kobject_put(&sdp->sd_kobj);
752 wait_for_completion(&sdp->sd_kobj_unregister);
753 return error;
754}
755
756void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
757{
758 sysfs_remove_link(&sdp->sd_kobj, "device");
759 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
760 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
761 kobject_put(&sdp->sd_kobj);
762 wait_for_completion(&sdp->sd_kobj_unregister);
763}
764
765static int gfs2_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
766{
767 const struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
768 const struct super_block *s = sdp->sd_vfs;
769
770 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
771 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
772 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
773 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
774 if (!uuid_is_null(&s->s_uuid))
775 add_uevent_var(env, "UUID=%pUB", &s->s_uuid);
776 return 0;
777}
778
779static const struct kset_uevent_ops gfs2_uevent_ops = {
780 .uevent = gfs2_uevent,
781};
782
783int gfs2_sys_init(void)
784{
785 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
786 if (!gfs2_kset)
787 return -ENOMEM;
788 return 0;
789}
790
791void gfs2_sys_uninit(void)
792{
793 kset_unregister(gfs2_kset);
794}
795