2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/sched.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/module.h>
15 #include <linux/kobject.h>
16 #include <asm/uaccess.h>
17 #include <linux/gfs2_ondisk.h>
18 #include <linux/genhd.h>
30 struct attribute attr;
31 ssize_t (*show)(struct gfs2_sbd *, char *);
32 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
35 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
38 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
39 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
40 return a->show ? a->show(sdp, buf) : 0;
43 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
44 const char *buf, size_t len)
46 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
47 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
48 return a->store ? a->store(sdp, buf, len) : len;
51 static const struct sysfs_ops gfs2_attr_ops = {
52 .show = gfs2_attr_show,
53 .store = gfs2_attr_store,
57 static struct kset *gfs2_kset;
59 static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
61 return snprintf(buf, PAGE_SIZE, "%u:%u\n",
62 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
65 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
67 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
70 static int gfs2_uuid_valid(const u8 *uuid)
74 for (i = 0; i < 16; i++) {
81 static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
83 const u8 *uuid = sdp->sd_sb.sb_uuid;
85 if (!gfs2_uuid_valid(uuid))
87 return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
90 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
94 mutex_lock(&sdp->sd_freeze_lock);
95 count = sdp->sd_freeze_count;
96 mutex_unlock(&sdp->sd_freeze_lock);
98 return snprintf(buf, PAGE_SIZE, "%u\n", count);
101 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
105 int n = simple_strtol(buf, NULL, 0);
107 if (!capable(CAP_SYS_ADMIN))
112 gfs2_unfreeze_fs(sdp);
115 error = gfs2_freeze_fs(sdp);
122 fs_warn(sdp, "freeze %d error %d", n, error);
127 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
129 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
130 return snprintf(buf, PAGE_SIZE, "%u\n", b);
133 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
135 if (!capable(CAP_SYS_ADMIN))
138 if (simple_strtol(buf, NULL, 0) != 1)
141 gfs2_lm_withdraw(sdp,
142 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
147 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
150 if (!capable(CAP_SYS_ADMIN))
153 if (simple_strtol(buf, NULL, 0) != 1)
156 gfs2_statfs_sync(sdp->sd_vfs, 0);
160 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
163 if (!capable(CAP_SYS_ADMIN))
166 if (simple_strtol(buf, NULL, 0) != 1)
169 gfs2_quota_sync(sdp->sd_vfs, 0, 1);
173 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
179 if (!capable(CAP_SYS_ADMIN))
182 id = simple_strtoul(buf, NULL, 0);
184 error = gfs2_quota_refresh(sdp, 1, id);
185 return error ? error : len;
188 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
194 if (!capable(CAP_SYS_ADMIN))
197 id = simple_strtoul(buf, NULL, 0);
199 error = gfs2_quota_refresh(sdp, 0, id);
200 return error ? error : len;
203 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
205 struct gfs2_glock *gl;
206 const struct gfs2_glock_operations *glops;
209 unsigned long long glnum;
213 if (!capable(CAP_SYS_ADMIN))
216 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
221 if (strcmp(mode, "EX") == 0)
222 glmode = LM_ST_UNLOCKED;
223 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
224 glmode = LM_ST_DEFERRED;
225 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
226 glmode = LM_ST_SHARED;
230 if (gltype > LM_TYPE_JOURNAL)
232 glops = gfs2_glops_list[gltype];
235 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
236 fs_info(sdp, "demote interface used\n");
237 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
240 gfs2_glock_cb(gl, glmode);
246 #define GFS2_ATTR(name, mode, show, store) \
247 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
249 GFS2_ATTR(id, 0444, id_show, NULL);
250 GFS2_ATTR(fsname, 0444, fsname_show, NULL);
251 GFS2_ATTR(uuid, 0444, uuid_show, NULL);
252 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
253 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
254 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
255 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
256 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
257 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
258 GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
260 static struct attribute *gfs2_attrs[] = {
262 &gfs2_attr_fsname.attr,
263 &gfs2_attr_uuid.attr,
264 &gfs2_attr_freeze.attr,
265 &gfs2_attr_withdraw.attr,
266 &gfs2_attr_statfs_sync.attr,
267 &gfs2_attr_quota_sync.attr,
268 &gfs2_attr_quota_refresh_user.attr,
269 &gfs2_attr_quota_refresh_group.attr,
270 &gfs2_attr_demote_rq.attr,
274 static struct kobj_type gfs2_ktype = {
275 .default_attrs = gfs2_attrs,
276 .sysfs_ops = &gfs2_attr_ops,
281 * lock_module. Originally from lock_dlm
284 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
286 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
287 return sprintf(buf, "%s\n", ops->lm_proto_name);
290 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
292 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
296 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
298 ret = sprintf(buf, "%d\n", val);
302 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
304 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
308 val = simple_strtol(buf, NULL, 0);
311 set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
313 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
314 smp_mb__after_clear_bit();
315 gfs2_glock_thaw(sdp);
322 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
324 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
325 return sprintf(buf, "%d\n", ls->ls_first);
328 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
333 rv = sscanf(buf, "%u", &first);
334 if (rv != 1 || first > 1)
336 spin_lock(&sdp->sd_jindex_spin);
338 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
341 if (sdp->sd_args.ar_spectator)
343 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
345 sdp->sd_lockstruct.ls_first = first;
348 spin_unlock(&sdp->sd_jindex_spin);
349 return rv ? rv : len;
352 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
354 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
355 return sprintf(buf, "%d\n", ls->ls_first_done);
358 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
361 struct gfs2_jdesc *jd;
364 rv = sscanf(buf, "%u", &jid);
369 spin_lock(&sdp->sd_jindex_spin);
370 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags))
373 if (sdp->sd_jdesc->jd_jid == jid)
376 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
377 if (jd->jd_jid != jid)
379 rv = slow_work_enqueue(&jd->jd_work);
383 spin_unlock(&sdp->sd_jindex_spin);
384 return rv ? rv : len;
387 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
389 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
390 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
393 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
395 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
396 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
399 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
401 return sprintf(buf, "%u\n", sdp->sd_lockstruct.ls_jid);
404 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
409 rv = sscanf(buf, "%u", &jid);
413 spin_lock(&sdp->sd_jindex_spin);
415 if (sdp->sd_args.ar_spectator)
417 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
420 if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
422 sdp->sd_lockstruct.ls_jid = jid;
423 smp_mb__after_clear_bit();
424 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
427 spin_unlock(&sdp->sd_jindex_spin);
428 return rv ? rv : len;
431 #define GDLM_ATTR(_name,_mode,_show,_store) \
432 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
434 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
435 GDLM_ATTR(block, 0644, block_show, block_store);
436 GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
437 GDLM_ATTR(jid, 0644, jid_show, jid_store);
438 GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
439 GDLM_ATTR(first_done, 0444, first_done_show, NULL);
440 GDLM_ATTR(recover, 0600, NULL, recover_store);
441 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
442 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
444 static struct attribute *lock_module_attrs[] = {
445 &gdlm_attr_proto_name.attr,
446 &gdlm_attr_block.attr,
447 &gdlm_attr_withdraw.attr,
449 &gdlm_attr_first.attr,
450 &gdlm_attr_first_done.attr,
451 &gdlm_attr_recover.attr,
452 &gdlm_attr_recover_done.attr,
453 &gdlm_attr_recover_status.attr,
458 * get and set struct gfs2_tune fields
461 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
463 return snprintf(buf, PAGE_SIZE, "%u %u\n",
464 sdp->sd_tune.gt_quota_scale_num,
465 sdp->sd_tune.gt_quota_scale_den);
468 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
471 struct gfs2_tune *gt = &sdp->sd_tune;
474 if (!capable(CAP_SYS_ADMIN))
477 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
480 spin_lock(>->gt_spin);
481 gt->gt_quota_scale_num = x;
482 gt->gt_quota_scale_den = y;
483 spin_unlock(>->gt_spin);
487 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
488 int check_zero, const char *buf, size_t len)
490 struct gfs2_tune *gt = &sdp->sd_tune;
493 if (!capable(CAP_SYS_ADMIN))
496 x = simple_strtoul(buf, NULL, 0);
498 if (check_zero && !x)
501 spin_lock(>->gt_spin);
503 spin_unlock(>->gt_spin);
507 #define TUNE_ATTR_3(name, show, store) \
508 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
510 #define TUNE_ATTR_2(name, store) \
511 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
513 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
515 TUNE_ATTR_3(name, name##_show, store)
517 #define TUNE_ATTR(name, check_zero) \
518 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
520 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
522 TUNE_ATTR_2(name, name##_store)
524 TUNE_ATTR(quota_warn_period, 0);
525 TUNE_ATTR(quota_quantum, 0);
526 TUNE_ATTR(max_readahead, 0);
527 TUNE_ATTR(complain_secs, 0);
528 TUNE_ATTR(statfs_slow, 0);
529 TUNE_ATTR(new_files_jdata, 0);
530 TUNE_ATTR(quota_simul_sync, 1);
531 TUNE_ATTR(statfs_quantum, 1);
532 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
534 static struct attribute *tune_attrs[] = {
535 &tune_attr_quota_warn_period.attr,
536 &tune_attr_quota_quantum.attr,
537 &tune_attr_max_readahead.attr,
538 &tune_attr_complain_secs.attr,
539 &tune_attr_statfs_slow.attr,
540 &tune_attr_quota_simul_sync.attr,
541 &tune_attr_statfs_quantum.attr,
542 &tune_attr_quota_scale.attr,
543 &tune_attr_new_files_jdata.attr,
547 static struct attribute_group tune_group = {
552 static struct attribute_group lock_module_group = {
553 .name = "lock_module",
554 .attrs = lock_module_attrs,
557 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
559 struct super_block *sb = sdp->sd_vfs;
563 char *envp[] = { ro, spectator, NULL };
565 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
566 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
568 sdp->sd_kobj.kset = gfs2_kset;
569 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
570 "%s", sdp->sd_table_name);
574 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
578 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
582 error = sysfs_create_link(&sdp->sd_kobj,
583 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
586 goto fail_lock_module;
588 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
592 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
594 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
596 kobject_put(&sdp->sd_kobj);
598 fs_err(sdp, "error %d adding sysfs files", error);
602 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
604 sysfs_remove_link(&sdp->sd_kobj, "device");
605 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
606 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
607 kobject_put(&sdp->sd_kobj);
610 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
611 struct kobj_uevent_env *env)
613 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
614 const u8 *uuid = sdp->sd_sb.sb_uuid;
616 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
617 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
618 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
619 add_uevent_var(env, "JOURNALID=%u", sdp->sd_lockstruct.ls_jid);
620 if (gfs2_uuid_valid(uuid))
621 add_uevent_var(env, "UUID=%pUB", uuid);
625 static const struct kset_uevent_ops gfs2_uevent_ops = {
626 .uevent = gfs2_uevent,
629 int gfs2_sys_init(void)
631 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
637 void gfs2_sys_uninit(void)
639 kset_unregister(gfs2_kset);