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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 status_show(struct gfs2_sbd *sdp, char *buf)
70{
71 unsigned long f = sdp->sd_flags;
72 ssize_t s;
73
74 s = snprintf(buf, PAGE_SIZE,
75 "Journal Checked: %d\n"
76 "Journal Live: %d\n"
77 "Journal ID: %d\n"
78 "Spectator: %d\n"
79 "Withdrawn: %d\n"
80 "No barriers: %d\n"
81 "No recovery: %d\n"
82 "Demote: %d\n"
83 "No Journal ID: %d\n"
84 "Mounted RO: %d\n"
85 "RO Recovery: %d\n"
86 "Skip DLM Unlock: %d\n"
87 "Force AIL Flush: %d\n"
88 "FS Frozen: %d\n"
89 "Withdrawing: %d\n"
90 "Withdraw In Prog: %d\n"
91 "Remote Withdraw: %d\n"
92 "Withdraw Recovery: %d\n"
93 "sd_log_error: %d\n"
94 "sd_log_flush_lock: %d\n"
95 "sd_log_num_revoke: %u\n"
96 "sd_log_in_flight: %d\n"
97 "sd_log_blks_needed: %d\n"
98 "sd_log_blks_free: %d\n"
99 "sd_log_flush_head: %d\n"
100 "sd_log_flush_tail: %d\n"
101 "sd_log_blks_reserved: %d\n"
102 "sd_log_revokes_available: %d\n",
103 test_bit(SDF_JOURNAL_CHECKED, &f),
104 test_bit(SDF_JOURNAL_LIVE, &f),
105 (sdp->sd_jdesc ? sdp->sd_jdesc->jd_jid : 0),
106 (sdp->sd_args.ar_spectator ? 1 : 0),
107 test_bit(SDF_WITHDRAWN, &f),
108 test_bit(SDF_NOBARRIERS, &f),
109 test_bit(SDF_NORECOVERY, &f),
110 test_bit(SDF_DEMOTE, &f),
111 test_bit(SDF_NOJOURNALID, &f),
112 (sb_rdonly(sdp->sd_vfs) ? 1 : 0),
113 test_bit(SDF_RORECOVERY, &f),
114 test_bit(SDF_SKIP_DLM_UNLOCK, &f),
115 test_bit(SDF_FORCE_AIL_FLUSH, &f),
116 test_bit(SDF_FS_FROZEN, &f),
117 test_bit(SDF_WITHDRAWING, &f),
118 test_bit(SDF_WITHDRAW_IN_PROG, &f),
119 test_bit(SDF_REMOTE_WITHDRAW, &f),
120 test_bit(SDF_WITHDRAW_RECOVERY, &f),
121 sdp->sd_log_error,
122 rwsem_is_locked(&sdp->sd_log_flush_lock),
123 sdp->sd_log_num_revoke,
124 atomic_read(&sdp->sd_log_in_flight),
125 atomic_read(&sdp->sd_log_blks_needed),
126 atomic_read(&sdp->sd_log_blks_free),
127 sdp->sd_log_flush_head,
128 sdp->sd_log_flush_tail,
129 sdp->sd_log_blks_reserved,
130 atomic_read(&sdp->sd_log_revokes_available));
131 return s;
132}
133
134static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
135{
136 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
137}
138
139static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
140{
141 struct super_block *s = sdp->sd_vfs;
142
143 buf[0] = '\0';
144 if (uuid_is_null(&s->s_uuid))
145 return 0;
146 return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid);
147}
148
149static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
150{
151 struct super_block *sb = sdp->sd_vfs;
152 int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
153
154 return snprintf(buf, PAGE_SIZE, "%d\n", frozen);
155}
156
157static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
158{
159 int error, n;
160
161 error = kstrtoint(buf, 0, &n);
162 if (error)
163 return error;
164
165 if (!capable(CAP_SYS_ADMIN))
166 return -EPERM;
167
168 switch (n) {
169 case 0:
170 error = thaw_super(sdp->sd_vfs);
171 break;
172 case 1:
173 error = freeze_super(sdp->sd_vfs);
174 break;
175 default:
176 return -EINVAL;
177 }
178
179 if (error) {
180 fs_warn(sdp, "freeze %d error %d\n", n, error);
181 return error;
182 }
183
184 return len;
185}
186
187static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
188{
189 unsigned int b = gfs2_withdrawn(sdp);
190 return snprintf(buf, PAGE_SIZE, "%u\n", b);
191}
192
193static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
194{
195 int error, val;
196
197 if (!capable(CAP_SYS_ADMIN))
198 return -EPERM;
199
200 error = kstrtoint(buf, 0, &val);
201 if (error)
202 return error;
203
204 if (val != 1)
205 return -EINVAL;
206
207 gfs2_lm(sdp, "withdrawing from cluster at user's request\n");
208 gfs2_withdraw(sdp);
209
210 return len;
211}
212
213static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
214 size_t len)
215{
216 int error, val;
217
218 if (!capable(CAP_SYS_ADMIN))
219 return -EPERM;
220
221 error = kstrtoint(buf, 0, &val);
222 if (error)
223 return error;
224
225 if (val != 1)
226 return -EINVAL;
227
228 gfs2_statfs_sync(sdp->sd_vfs, 0);
229 return len;
230}
231
232static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
233 size_t len)
234{
235 int error, val;
236
237 if (!capable(CAP_SYS_ADMIN))
238 return -EPERM;
239
240 error = kstrtoint(buf, 0, &val);
241 if (error)
242 return error;
243
244 if (val != 1)
245 return -EINVAL;
246
247 gfs2_quota_sync(sdp->sd_vfs, 0);
248 return len;
249}
250
251static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
252 size_t len)
253{
254 struct kqid qid;
255 int error;
256 u32 id;
257
258 if (!capable(CAP_SYS_ADMIN))
259 return -EPERM;
260
261 error = kstrtou32(buf, 0, &id);
262 if (error)
263 return error;
264
265 qid = make_kqid(current_user_ns(), USRQUOTA, id);
266 if (!qid_valid(qid))
267 return -EINVAL;
268
269 error = gfs2_quota_refresh(sdp, qid);
270 return error ? error : len;
271}
272
273static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
274 size_t len)
275{
276 struct kqid qid;
277 int error;
278 u32 id;
279
280 if (!capable(CAP_SYS_ADMIN))
281 return -EPERM;
282
283 error = kstrtou32(buf, 0, &id);
284 if (error)
285 return error;
286
287 qid = make_kqid(current_user_ns(), GRPQUOTA, id);
288 if (!qid_valid(qid))
289 return -EINVAL;
290
291 error = gfs2_quota_refresh(sdp, qid);
292 return error ? error : len;
293}
294
295static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
296{
297 struct gfs2_glock *gl;
298 const struct gfs2_glock_operations *glops;
299 unsigned int glmode;
300 unsigned int gltype;
301 unsigned long long glnum;
302 char mode[16];
303 int rv;
304
305 if (!capable(CAP_SYS_ADMIN))
306 return -EPERM;
307
308 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
309 mode);
310 if (rv != 3)
311 return -EINVAL;
312
313 if (strcmp(mode, "EX") == 0)
314 glmode = LM_ST_UNLOCKED;
315 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
316 glmode = LM_ST_DEFERRED;
317 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
318 glmode = LM_ST_SHARED;
319 else
320 return -EINVAL;
321
322 if (gltype > LM_TYPE_JOURNAL)
323 return -EINVAL;
324 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
325 glops = &gfs2_freeze_glops;
326 else
327 glops = gfs2_glops_list[gltype];
328 if (glops == NULL)
329 return -EINVAL;
330 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
331 fs_info(sdp, "demote interface used\n");
332 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
333 if (rv)
334 return rv;
335 gfs2_glock_cb(gl, glmode);
336 gfs2_glock_put(gl);
337 return len;
338}
339
340
341#define GFS2_ATTR(name, mode, show, store) \
342static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
343
344GFS2_ATTR(id, 0444, id_show, NULL);
345GFS2_ATTR(fsname, 0444, fsname_show, NULL);
346GFS2_ATTR(uuid, 0444, uuid_show, NULL);
347GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
348GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
349GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
350GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
351GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
352GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
353GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
354GFS2_ATTR(status, 0400, status_show, NULL);
355
356static struct attribute *gfs2_attrs[] = {
357 &gfs2_attr_id.attr,
358 &gfs2_attr_fsname.attr,
359 &gfs2_attr_uuid.attr,
360 &gfs2_attr_freeze.attr,
361 &gfs2_attr_withdraw.attr,
362 &gfs2_attr_statfs_sync.attr,
363 &gfs2_attr_quota_sync.attr,
364 &gfs2_attr_quota_refresh_user.attr,
365 &gfs2_attr_quota_refresh_group.attr,
366 &gfs2_attr_demote_rq.attr,
367 &gfs2_attr_status.attr,
368 NULL,
369};
370
371static void gfs2_sbd_release(struct kobject *kobj)
372{
373 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
374
375 complete(&sdp->sd_kobj_unregister);
376}
377
378static struct kobj_type gfs2_ktype = {
379 .release = gfs2_sbd_release,
380 .default_attrs = gfs2_attrs,
381 .sysfs_ops = &gfs2_attr_ops,
382};
383
384
385
386
387
388
389static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
390{
391 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
392 return sprintf(buf, "%s\n", ops->lm_proto_name);
393}
394
395static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
396{
397 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
398 ssize_t ret;
399 int val = 0;
400
401 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
402 val = 1;
403 ret = sprintf(buf, "%d\n", val);
404 return ret;
405}
406
407static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
408{
409 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
410 int ret, val;
411
412 ret = kstrtoint(buf, 0, &val);
413 if (ret)
414 return ret;
415
416 if (val == 1)
417 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
418 else if (val == 0) {
419 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
420 smp_mb__after_atomic();
421 gfs2_glock_thaw(sdp);
422 } else {
423 return -EINVAL;
424 }
425 return len;
426}
427
428static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
429{
430 int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
431
432 return sprintf(buf, "%d\n", val);
433}
434
435static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
436{
437 int ret, val;
438
439 ret = kstrtoint(buf, 0, &val);
440 if (ret)
441 return ret;
442
443 if ((val == 1) &&
444 !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
445 complete(&sdp->sd_wdack);
446 else
447 return -EINVAL;
448 return len;
449}
450
451static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
452{
453 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
454 return sprintf(buf, "%d\n", ls->ls_first);
455}
456
457static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
458{
459 unsigned first;
460 int rv;
461
462 rv = sscanf(buf, "%u", &first);
463 if (rv != 1 || first > 1)
464 return -EINVAL;
465 rv = wait_for_completion_killable(&sdp->sd_locking_init);
466 if (rv)
467 return rv;
468 spin_lock(&sdp->sd_jindex_spin);
469 rv = -EBUSY;
470 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
471 goto out;
472 rv = -EINVAL;
473 if (sdp->sd_args.ar_spectator)
474 goto out;
475 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
476 goto out;
477 sdp->sd_lockstruct.ls_first = first;
478 rv = 0;
479out:
480 spin_unlock(&sdp->sd_jindex_spin);
481 return rv ? rv : len;
482}
483
484static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
485{
486 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
487 return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
488}
489
490int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
491{
492 struct gfs2_jdesc *jd;
493 int rv;
494
495
496 wait_for_completion(&sdp->sd_journal_ready);
497
498 spin_lock(&sdp->sd_jindex_spin);
499 rv = -EBUSY;
500
501
502
503
504
505
506
507 if (!sdp->sd_jdesc)
508 goto out;
509 if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator)
510 goto out;
511 rv = -ENOENT;
512 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
513 if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator)
514 continue;
515 rv = gfs2_recover_journal(jd, false);
516 break;
517 }
518out:
519 spin_unlock(&sdp->sd_jindex_spin);
520 return rv;
521}
522
523static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
524{
525 unsigned jid;
526 int rv;
527
528 rv = sscanf(buf, "%u", &jid);
529 if (rv != 1)
530 return -EINVAL;
531
532 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
533 rv = -ESHUTDOWN;
534 goto out;
535 }
536
537 rv = gfs2_recover_set(sdp, jid);
538out:
539 return rv ? rv : len;
540}
541
542static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
543{
544 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
545 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
546}
547
548static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
549{
550 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
551 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
552}
553
554static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
555{
556 return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
557}
558
559static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
560{
561 int jid;
562 int rv;
563
564 rv = sscanf(buf, "%d", &jid);
565 if (rv != 1)
566 return -EINVAL;
567 rv = wait_for_completion_killable(&sdp->sd_locking_init);
568 if (rv)
569 return rv;
570 spin_lock(&sdp->sd_jindex_spin);
571 rv = -EINVAL;
572 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
573 goto out;
574 rv = -EBUSY;
575 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
576 goto out;
577 rv = 0;
578 if (sdp->sd_args.ar_spectator && jid > 0)
579 rv = jid = -EINVAL;
580 sdp->sd_lockstruct.ls_jid = jid;
581 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
582 smp_mb__after_atomic();
583 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
584out:
585 spin_unlock(&sdp->sd_jindex_spin);
586 return rv ? rv : len;
587}
588
589#define GDLM_ATTR(_name,_mode,_show,_store) \
590static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
591
592GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
593GDLM_ATTR(block, 0644, block_show, block_store);
594GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store);
595GDLM_ATTR(jid, 0644, jid_show, jid_store);
596GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
597GDLM_ATTR(first_done, 0444, first_done_show, NULL);
598GDLM_ATTR(recover, 0600, NULL, recover_store);
599GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
600GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
601
602static struct attribute *lock_module_attrs[] = {
603 &gdlm_attr_proto_name.attr,
604 &gdlm_attr_block.attr,
605 &gdlm_attr_withdraw.attr,
606 &gdlm_attr_jid.attr,
607 &gdlm_attr_first.attr,
608 &gdlm_attr_first_done.attr,
609 &gdlm_attr_recover.attr,
610 &gdlm_attr_recover_done.attr,
611 &gdlm_attr_recover_status.attr,
612 NULL,
613};
614
615
616
617
618
619static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
620{
621 return snprintf(buf, PAGE_SIZE, "%u %u\n",
622 sdp->sd_tune.gt_quota_scale_num,
623 sdp->sd_tune.gt_quota_scale_den);
624}
625
626static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
627 size_t len)
628{
629 struct gfs2_tune *gt = &sdp->sd_tune;
630 unsigned int x, y;
631
632 if (!capable(CAP_SYS_ADMIN))
633 return -EPERM;
634
635 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
636 return -EINVAL;
637
638 spin_lock(>->gt_spin);
639 gt->gt_quota_scale_num = x;
640 gt->gt_quota_scale_den = y;
641 spin_unlock(>->gt_spin);
642 return len;
643}
644
645static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
646 int check_zero, const char *buf, size_t len)
647{
648 struct gfs2_tune *gt = &sdp->sd_tune;
649 unsigned int x;
650 int error;
651
652 if (!capable(CAP_SYS_ADMIN))
653 return -EPERM;
654
655 error = kstrtouint(buf, 0, &x);
656 if (error)
657 return error;
658
659 if (check_zero && !x)
660 return -EINVAL;
661
662 spin_lock(>->gt_spin);
663 *field = x;
664 spin_unlock(>->gt_spin);
665 return len;
666}
667
668#define TUNE_ATTR_3(name, show, store) \
669static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
670
671#define TUNE_ATTR_2(name, store) \
672static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
673{ \
674 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
675} \
676TUNE_ATTR_3(name, name##_show, store)
677
678#define TUNE_ATTR(name, check_zero) \
679static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
680{ \
681 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
682} \
683TUNE_ATTR_2(name, name##_store)
684
685TUNE_ATTR(quota_warn_period, 0);
686TUNE_ATTR(quota_quantum, 0);
687TUNE_ATTR(max_readahead, 0);
688TUNE_ATTR(complain_secs, 0);
689TUNE_ATTR(statfs_slow, 0);
690TUNE_ATTR(new_files_jdata, 0);
691TUNE_ATTR(statfs_quantum, 1);
692TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
693
694static struct attribute *tune_attrs[] = {
695 &tune_attr_quota_warn_period.attr,
696 &tune_attr_quota_quantum.attr,
697 &tune_attr_max_readahead.attr,
698 &tune_attr_complain_secs.attr,
699 &tune_attr_statfs_slow.attr,
700 &tune_attr_statfs_quantum.attr,
701 &tune_attr_quota_scale.attr,
702 &tune_attr_new_files_jdata.attr,
703 NULL,
704};
705
706static const struct attribute_group tune_group = {
707 .name = "tune",
708 .attrs = tune_attrs,
709};
710
711static const struct attribute_group lock_module_group = {
712 .name = "lock_module",
713 .attrs = lock_module_attrs,
714};
715
716int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
717{
718 struct super_block *sb = sdp->sd_vfs;
719 int error;
720 char ro[20];
721 char spectator[20];
722 char *envp[] = { ro, spectator, NULL };
723
724 sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
725 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
726
727 init_completion(&sdp->sd_kobj_unregister);
728 sdp->sd_kobj.kset = gfs2_kset;
729 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
730 "%s", sdp->sd_table_name);
731 if (error)
732 goto fail_reg;
733
734 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
735 if (error)
736 goto fail_reg;
737
738 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
739 if (error)
740 goto fail_tune;
741
742 error = sysfs_create_link(&sdp->sd_kobj,
743 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
744 "device");
745 if (error)
746 goto fail_lock_module;
747
748 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
749 return 0;
750
751fail_lock_module:
752 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
753fail_tune:
754 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
755fail_reg:
756 fs_err(sdp, "error %d adding sysfs files\n", error);
757 kobject_put(&sdp->sd_kobj);
758 wait_for_completion(&sdp->sd_kobj_unregister);
759 sb->s_fs_info = NULL;
760 return error;
761}
762
763void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
764{
765 sysfs_remove_link(&sdp->sd_kobj, "device");
766 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
767 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
768 kobject_put(&sdp->sd_kobj);
769 wait_for_completion(&sdp->sd_kobj_unregister);
770}
771
772static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
773 struct kobj_uevent_env *env)
774{
775 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
776 struct super_block *s = sdp->sd_vfs;
777
778 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
779 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
780 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
781 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
782 if (!uuid_is_null(&s->s_uuid))
783 add_uevent_var(env, "UUID=%pUB", &s->s_uuid);
784 return 0;
785}
786
787static const struct kset_uevent_ops gfs2_uevent_ops = {
788 .uevent = gfs2_uevent,
789};
790
791int gfs2_sys_init(void)
792{
793 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
794 if (!gfs2_kset)
795 return -ENOMEM;
796 return 0;
797}
798
799void gfs2_sys_uninit(void)
800{
801 kset_unregister(gfs2_kset);
802}
803
804
