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>
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 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, "%02X%02X%02X%02X-%02X%02X-"
88 "%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
89 uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5],
90 uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11],
91 uuid[12], uuid[13], uuid[14], uuid[15]);
94 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
98 mutex_lock(&sdp->sd_freeze_lock);
99 count = sdp->sd_freeze_count;
100 mutex_unlock(&sdp->sd_freeze_lock);
102 return snprintf(buf, PAGE_SIZE, "%u\n", count);
105 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
109 int n = simple_strtol(buf, NULL, 0);
111 if (!capable(CAP_SYS_ADMIN))
116 gfs2_unfreeze_fs(sdp);
119 error = gfs2_freeze_fs(sdp);
126 fs_warn(sdp, "freeze %d error %d", n, error);
131 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
133 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
134 return snprintf(buf, PAGE_SIZE, "%u\n", b);
137 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
139 if (!capable(CAP_SYS_ADMIN))
142 if (simple_strtol(buf, NULL, 0) != 1)
145 gfs2_lm_withdraw(sdp,
146 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
151 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
154 if (!capable(CAP_SYS_ADMIN))
157 if (simple_strtol(buf, NULL, 0) != 1)
160 gfs2_statfs_sync(sdp);
164 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
167 if (!capable(CAP_SYS_ADMIN))
170 if (simple_strtol(buf, NULL, 0) != 1)
173 gfs2_quota_sync(sdp);
177 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
182 if (!capable(CAP_SYS_ADMIN))
185 id = simple_strtoul(buf, NULL, 0);
187 gfs2_quota_refresh(sdp, 1, id);
191 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
196 if (!capable(CAP_SYS_ADMIN))
199 id = simple_strtoul(buf, NULL, 0);
201 gfs2_quota_refresh(sdp, 0, id);
205 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
207 struct gfs2_glock *gl;
208 const struct gfs2_glock_operations *glops;
211 unsigned long long glnum;
215 if (!capable(CAP_SYS_ADMIN))
218 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
223 if (strcmp(mode, "EX") == 0)
224 glmode = LM_ST_UNLOCKED;
225 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
226 glmode = LM_ST_DEFERRED;
227 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
228 glmode = LM_ST_SHARED;
232 if (gltype > LM_TYPE_JOURNAL)
234 glops = gfs2_glops_list[gltype];
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,
280 * display struct lm_lockstruct fields
283 #define LOCKSTRUCT_ATTR(name, fmt) \
284 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
286 return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
288 static struct gfs2_attr lockstruct_attr_##name = __ATTR_RO(name)
290 LOCKSTRUCT_ATTR(jid, "%u\n");
291 LOCKSTRUCT_ATTR(first, "%u\n");
293 static struct attribute *lockstruct_attrs[] = {
294 &lockstruct_attr_jid.attr,
295 &lockstruct_attr_first.attr,
300 * lock_module. Originally from lock_dlm
303 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
305 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
306 return sprintf(buf, "%s\n", ops->lm_proto_name);
309 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
311 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
315 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
317 ret = sprintf(buf, "%d\n", val);
321 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
323 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
327 val = simple_strtol(buf, NULL, 0);
330 set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
332 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
333 smp_mb__after_clear_bit();
334 gfs2_glock_thaw(sdp);
341 static ssize_t lkid_show(struct gfs2_sbd *sdp, char *buf)
343 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
344 return sprintf(buf, "%u\n", ls->ls_id);
347 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
349 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
350 return sprintf(buf, "%d\n", ls->ls_first);
353 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
355 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
356 return sprintf(buf, "%d\n", ls->ls_first_done);
359 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
362 struct gfs2_jdesc *jd;
365 rv = sscanf(buf, "%u", &jid);
370 spin_lock(&sdp->sd_jindex_spin);
371 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags))
374 if (sdp->sd_jdesc->jd_jid == jid)
377 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
378 if (jd->jd_jid != jid)
380 rv = slow_work_enqueue(&jd->jd_work);
384 spin_unlock(&sdp->sd_jindex_spin);
385 return rv ? rv : len;
388 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
390 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
391 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
394 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
396 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
397 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
400 #define GDLM_ATTR(_name,_mode,_show,_store) \
401 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
403 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
404 GDLM_ATTR(block, 0644, block_show, block_store);
405 GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
406 GDLM_ATTR(id, 0444, lkid_show, NULL);
407 GDLM_ATTR(first, 0444, lkfirst_show, NULL);
408 GDLM_ATTR(first_done, 0444, first_done_show, NULL);
409 GDLM_ATTR(recover, 0200, NULL, recover_store);
410 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
411 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
413 static struct attribute *lock_module_attrs[] = {
414 &gdlm_attr_proto_name.attr,
415 &gdlm_attr_block.attr,
416 &gdlm_attr_withdraw.attr,
418 &lockstruct_attr_jid.attr,
419 &gdlm_attr_first.attr,
420 &gdlm_attr_first_done.attr,
421 &gdlm_attr_recover.attr,
422 &gdlm_attr_recover_done.attr,
423 &gdlm_attr_recover_status.attr,
427 #define ARGS_ATTR(name, fmt) \
428 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
430 return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name); \
432 static struct gfs2_attr args_attr_##name = __ATTR_RO(name)
434 ARGS_ATTR(lockproto, "%s\n");
435 ARGS_ATTR(locktable, "%s\n");
436 ARGS_ATTR(hostdata, "%s\n");
437 ARGS_ATTR(spectator, "%d\n");
438 ARGS_ATTR(ignore_local_fs, "%d\n");
439 ARGS_ATTR(localcaching, "%d\n");
440 ARGS_ATTR(localflocks, "%d\n");
441 ARGS_ATTR(debug, "%d\n");
442 ARGS_ATTR(upgrade, "%d\n");
443 ARGS_ATTR(posix_acl, "%d\n");
444 ARGS_ATTR(quota, "%u\n");
445 ARGS_ATTR(suiddir, "%d\n");
446 ARGS_ATTR(data, "%d\n");
448 static struct attribute *args_attrs[] = {
449 &args_attr_lockproto.attr,
450 &args_attr_locktable.attr,
451 &args_attr_hostdata.attr,
452 &args_attr_spectator.attr,
453 &args_attr_ignore_local_fs.attr,
454 &args_attr_localcaching.attr,
455 &args_attr_localflocks.attr,
456 &args_attr_debug.attr,
457 &args_attr_upgrade.attr,
458 &args_attr_posix_acl.attr,
459 &args_attr_quota.attr,
460 &args_attr_suiddir.attr,
461 &args_attr_data.attr,
466 * get and set struct gfs2_tune fields
469 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
471 return snprintf(buf, PAGE_SIZE, "%u %u\n",
472 sdp->sd_tune.gt_quota_scale_num,
473 sdp->sd_tune.gt_quota_scale_den);
476 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
479 struct gfs2_tune *gt = &sdp->sd_tune;
482 if (!capable(CAP_SYS_ADMIN))
485 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
488 spin_lock(>->gt_spin);
489 gt->gt_quota_scale_num = x;
490 gt->gt_quota_scale_den = y;
491 spin_unlock(>->gt_spin);
495 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
496 int check_zero, const char *buf, size_t len)
498 struct gfs2_tune *gt = &sdp->sd_tune;
501 if (!capable(CAP_SYS_ADMIN))
504 x = simple_strtoul(buf, NULL, 0);
506 if (check_zero && !x)
509 spin_lock(>->gt_spin);
511 spin_unlock(>->gt_spin);
515 #define TUNE_ATTR_3(name, show, store) \
516 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
518 #define TUNE_ATTR_2(name, store) \
519 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
521 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
523 TUNE_ATTR_3(name, name##_show, store)
525 #define TUNE_ATTR(name, check_zero) \
526 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
528 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
530 TUNE_ATTR_2(name, name##_store)
532 TUNE_ATTR(incore_log_blocks, 0);
533 TUNE_ATTR(log_flush_secs, 0);
534 TUNE_ATTR(quota_warn_period, 0);
535 TUNE_ATTR(quota_quantum, 0);
536 TUNE_ATTR(max_readahead, 0);
537 TUNE_ATTR(complain_secs, 0);
538 TUNE_ATTR(statfs_slow, 0);
539 TUNE_ATTR(new_files_jdata, 0);
540 TUNE_ATTR(quota_simul_sync, 1);
541 TUNE_ATTR(stall_secs, 1);
542 TUNE_ATTR(statfs_quantum, 1);
543 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
545 static struct attribute *tune_attrs[] = {
546 &tune_attr_incore_log_blocks.attr,
547 &tune_attr_log_flush_secs.attr,
548 &tune_attr_quota_warn_period.attr,
549 &tune_attr_quota_quantum.attr,
550 &tune_attr_max_readahead.attr,
551 &tune_attr_complain_secs.attr,
552 &tune_attr_statfs_slow.attr,
553 &tune_attr_quota_simul_sync.attr,
554 &tune_attr_stall_secs.attr,
555 &tune_attr_statfs_quantum.attr,
556 &tune_attr_quota_scale.attr,
557 &tune_attr_new_files_jdata.attr,
561 static struct attribute_group lockstruct_group = {
562 .name = "lockstruct",
563 .attrs = lockstruct_attrs,
566 static struct attribute_group args_group = {
571 static struct attribute_group tune_group = {
576 static struct attribute_group lock_module_group = {
577 .name = "lock_module",
578 .attrs = lock_module_attrs,
581 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
585 sdp->sd_kobj.kset = gfs2_kset;
586 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
587 "%s", sdp->sd_table_name);
591 error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
595 error = sysfs_create_group(&sdp->sd_kobj, &args_group);
597 goto fail_lockstruct;
599 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
603 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
607 kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
611 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
613 sysfs_remove_group(&sdp->sd_kobj, &args_group);
615 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
617 kobject_put(&sdp->sd_kobj);
619 fs_err(sdp, "error %d adding sysfs files", error);
623 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
625 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
626 sysfs_remove_group(&sdp->sd_kobj, &args_group);
627 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
628 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
629 kobject_put(&sdp->sd_kobj);
633 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
634 struct kobj_uevent_env *env)
636 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
637 const u8 *uuid = sdp->sd_sb.sb_uuid;
639 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
640 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
641 if (gfs2_uuid_valid(uuid)) {
642 add_uevent_var(env, "UUID=%02X%02X%02X%02X-%02X%02X-%02X%02X-"
643 "%02X%02X-%02X%02X%02X%02X%02X%02X",
644 uuid[0], uuid[1], uuid[2], uuid[3], uuid[4],
645 uuid[5], uuid[6], uuid[7], uuid[8], uuid[9],
646 uuid[10], uuid[11], uuid[12], uuid[13],
652 static struct kset_uevent_ops gfs2_uevent_ops = {
653 .uevent = gfs2_uevent,
657 int gfs2_sys_init(void)
659 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
665 void gfs2_sys_uninit(void)
667 kset_unregister(gfs2_kset);