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