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/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/module.h>
16 #include <linux/kobject.h>
17 #include <asm/uaccess.h>
18 #include <linux/gfs2_ondisk.h>
19 #include <linux/genhd.h>
31 struct attribute attr;
32 ssize_t (*show)(struct gfs2_sbd *, char *);
33 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
36 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
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;
44 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
45 const char *buf, size_t len)
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;
52 static struct sysfs_ops gfs2_attr_ops = {
53 .show = gfs2_attr_show,
54 .store = gfs2_attr_store,
58 static struct kset *gfs2_kset;
60 static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
62 return snprintf(buf, PAGE_SIZE, "%u:%u\n",
63 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
66 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
68 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
71 static int gfs2_uuid_valid(const u8 *uuid)
75 for (i = 0; i < 16; i++) {
82 static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
84 const u8 *uuid = sdp->sd_sb.sb_uuid;
86 if (!gfs2_uuid_valid(uuid))
88 return snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X-%02X%02X-"
89 "%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
90 uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5],
91 uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11],
92 uuid[12], uuid[13], uuid[14], uuid[15]);
95 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
99 mutex_lock(&sdp->sd_freeze_lock);
100 count = sdp->sd_freeze_count;
101 mutex_unlock(&sdp->sd_freeze_lock);
103 return snprintf(buf, PAGE_SIZE, "%u\n", count);
106 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
110 int n = simple_strtol(buf, NULL, 0);
112 if (!capable(CAP_SYS_ADMIN))
117 gfs2_unfreeze_fs(sdp);
120 error = gfs2_freeze_fs(sdp);
127 fs_warn(sdp, "freeze %d error %d", n, error);
132 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
134 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
135 return snprintf(buf, PAGE_SIZE, "%u\n", b);
138 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
140 if (!capable(CAP_SYS_ADMIN))
143 if (simple_strtol(buf, NULL, 0) != 1)
146 gfs2_lm_withdraw(sdp,
147 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
152 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
155 if (!capable(CAP_SYS_ADMIN))
158 if (simple_strtol(buf, NULL, 0) != 1)
161 gfs2_statfs_sync(sdp);
165 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
168 if (!capable(CAP_SYS_ADMIN))
171 if (simple_strtol(buf, NULL, 0) != 1)
174 gfs2_quota_sync(sdp);
178 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
183 if (!capable(CAP_SYS_ADMIN))
186 id = simple_strtoul(buf, NULL, 0);
188 gfs2_quota_refresh(sdp, 1, id);
192 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
197 if (!capable(CAP_SYS_ADMIN))
200 id = simple_strtoul(buf, NULL, 0);
202 gfs2_quota_refresh(sdp, 0, id);
206 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
208 struct gfs2_glock *gl;
209 const struct gfs2_glock_operations *glops;
212 unsigned long long glnum;
216 if (!capable(CAP_SYS_ADMIN))
219 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
224 if (strcmp(mode, "EX") == 0)
225 glmode = LM_ST_UNLOCKED;
226 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
227 glmode = LM_ST_DEFERRED;
228 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
229 glmode = LM_ST_SHARED;
233 if (gltype > LM_TYPE_JOURNAL)
235 glops = gfs2_glops_list[gltype];
238 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
241 gfs2_glock_cb(gl, glmode);
247 #define GFS2_ATTR(name, mode, show, store) \
248 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
250 GFS2_ATTR(id, 0444, id_show, NULL);
251 GFS2_ATTR(fsname, 0444, fsname_show, NULL);
252 GFS2_ATTR(uuid, 0444, uuid_show, NULL);
253 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
254 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
255 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
256 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
257 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
258 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
259 GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
261 static struct attribute *gfs2_attrs[] = {
263 &gfs2_attr_fsname.attr,
264 &gfs2_attr_uuid.attr,
265 &gfs2_attr_freeze.attr,
266 &gfs2_attr_withdraw.attr,
267 &gfs2_attr_statfs_sync.attr,
268 &gfs2_attr_quota_sync.attr,
269 &gfs2_attr_quota_refresh_user.attr,
270 &gfs2_attr_quota_refresh_group.attr,
271 &gfs2_attr_demote_rq.attr,
275 static struct kobj_type gfs2_ktype = {
276 .default_attrs = gfs2_attrs,
277 .sysfs_ops = &gfs2_attr_ops,
282 * lock_module. Originally from lock_dlm
285 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
287 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
288 return sprintf(buf, "%s\n", ops->lm_proto_name);
291 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
293 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
297 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
299 ret = sprintf(buf, "%d\n", val);
303 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
305 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
309 val = simple_strtol(buf, NULL, 0);
312 set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
314 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
315 smp_mb__after_clear_bit();
316 gfs2_glock_thaw(sdp);
323 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
325 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
326 return sprintf(buf, "%d\n", ls->ls_first);
329 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
331 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
332 return sprintf(buf, "%d\n", ls->ls_first_done);
335 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
338 struct gfs2_jdesc *jd;
341 rv = sscanf(buf, "%u", &jid);
346 spin_lock(&sdp->sd_jindex_spin);
347 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags))
350 if (sdp->sd_jdesc->jd_jid == jid)
353 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
354 if (jd->jd_jid != jid)
356 rv = slow_work_enqueue(&jd->jd_work);
360 spin_unlock(&sdp->sd_jindex_spin);
361 return rv ? rv : len;
364 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
366 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
367 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
370 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
372 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
373 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
376 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
378 return sprintf(buf, "%u\n", sdp->sd_lockstruct.ls_jid);
381 #define GDLM_ATTR(_name,_mode,_show,_store) \
382 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
384 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
385 GDLM_ATTR(block, 0644, block_show, block_store);
386 GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
387 GDLM_ATTR(jid, 0444, jid_show, NULL);
388 GDLM_ATTR(first, 0444, lkfirst_show, NULL);
389 GDLM_ATTR(first_done, 0444, first_done_show, NULL);
390 GDLM_ATTR(recover, 0600, NULL, recover_store);
391 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
392 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
394 static struct attribute *lock_module_attrs[] = {
395 &gdlm_attr_proto_name.attr,
396 &gdlm_attr_block.attr,
397 &gdlm_attr_withdraw.attr,
399 &gdlm_attr_first.attr,
400 &gdlm_attr_first_done.attr,
401 &gdlm_attr_recover.attr,
402 &gdlm_attr_recover_done.attr,
403 &gdlm_attr_recover_status.attr,
408 * get and set struct gfs2_tune fields
411 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
413 return snprintf(buf, PAGE_SIZE, "%u %u\n",
414 sdp->sd_tune.gt_quota_scale_num,
415 sdp->sd_tune.gt_quota_scale_den);
418 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
421 struct gfs2_tune *gt = &sdp->sd_tune;
424 if (!capable(CAP_SYS_ADMIN))
427 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
430 spin_lock(>->gt_spin);
431 gt->gt_quota_scale_num = x;
432 gt->gt_quota_scale_den = y;
433 spin_unlock(>->gt_spin);
437 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
438 int check_zero, const char *buf, size_t len)
440 struct gfs2_tune *gt = &sdp->sd_tune;
443 if (!capable(CAP_SYS_ADMIN))
446 x = simple_strtoul(buf, NULL, 0);
448 if (check_zero && !x)
451 spin_lock(>->gt_spin);
453 spin_unlock(>->gt_spin);
457 #define TUNE_ATTR_3(name, show, store) \
458 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
460 #define TUNE_ATTR_2(name, store) \
461 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
463 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
465 TUNE_ATTR_3(name, name##_show, store)
467 #define TUNE_ATTR(name, check_zero) \
468 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
470 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
472 TUNE_ATTR_2(name, name##_store)
474 TUNE_ATTR(incore_log_blocks, 0);
475 TUNE_ATTR(log_flush_secs, 0);
476 TUNE_ATTR(quota_warn_period, 0);
477 TUNE_ATTR(quota_quantum, 0);
478 TUNE_ATTR(max_readahead, 0);
479 TUNE_ATTR(complain_secs, 0);
480 TUNE_ATTR(statfs_slow, 0);
481 TUNE_ATTR(new_files_jdata, 0);
482 TUNE_ATTR(quota_simul_sync, 1);
483 TUNE_ATTR(stall_secs, 1);
484 TUNE_ATTR(statfs_quantum, 1);
485 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
487 static struct attribute *tune_attrs[] = {
488 &tune_attr_incore_log_blocks.attr,
489 &tune_attr_log_flush_secs.attr,
490 &tune_attr_quota_warn_period.attr,
491 &tune_attr_quota_quantum.attr,
492 &tune_attr_max_readahead.attr,
493 &tune_attr_complain_secs.attr,
494 &tune_attr_statfs_slow.attr,
495 &tune_attr_quota_simul_sync.attr,
496 &tune_attr_stall_secs.attr,
497 &tune_attr_statfs_quantum.attr,
498 &tune_attr_quota_scale.attr,
499 &tune_attr_new_files_jdata.attr,
503 static struct attribute_group tune_group = {
508 static struct attribute_group lock_module_group = {
509 .name = "lock_module",
510 .attrs = lock_module_attrs,
513 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
515 struct super_block *sb = sdp->sd_vfs;
519 char *envp[] = { ro, spectator, NULL };
521 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
522 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
524 sdp->sd_kobj.kset = gfs2_kset;
525 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
526 "%s", sdp->sd_table_name);
530 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
534 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
538 error = sysfs_create_link(&sdp->sd_kobj,
539 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
542 goto fail_lock_module;
544 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
548 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
550 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
552 kobject_put(&sdp->sd_kobj);
554 fs_err(sdp, "error %d adding sysfs files", error);
558 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
560 sysfs_remove_link(&sdp->sd_kobj, "device");
561 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
562 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
563 kobject_put(&sdp->sd_kobj);
566 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
567 struct kobj_uevent_env *env)
569 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
570 const u8 *uuid = sdp->sd_sb.sb_uuid;
572 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
573 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
574 if (!sdp->sd_args.ar_spectator)
575 add_uevent_var(env, "JOURNALID=%u", sdp->sd_lockstruct.ls_jid);
576 if (gfs2_uuid_valid(uuid)) {
577 add_uevent_var(env, "UUID=%02X%02X%02X%02X-%02X%02X-%02X%02X-"
578 "%02X%02X-%02X%02X%02X%02X%02X%02X",
579 uuid[0], uuid[1], uuid[2], uuid[3], uuid[4],
580 uuid[5], uuid[6], uuid[7], uuid[8], uuid[9],
581 uuid[10], uuid[11], uuid[12], uuid[13],
587 static struct kset_uevent_ops gfs2_uevent_ops = {
588 .uevent = gfs2_uevent,
591 int gfs2_sys_init(void)
593 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
599 void gfs2_sys_uninit(void)
601 kset_unregister(gfs2_kset);