[net-next-2.6.git] / fs / gfs2 / sys.c

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/module.h>
#include <linux/kobject.h>
#include <asm/uaccess.h>
#include <linux/gfs2_ondisk.h>
#include <linux/genhd.h>

#include "gfs2.h"
#include "incore.h"
#include "sys.h"
#include "super.h"
#include "glock.h"
#include "quota.h"
#include "util.h"
#include "glops.h"
#include "recovery.h"

struct gfs2_attr {
	struct attribute attr;
	ssize_t (*show)(struct gfs2_sbd *, char *);
	ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
};

static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
			      char *buf)
{
	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	return a->show ? a->show(sdp, buf) : 0;
}

static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
			       const char *buf, size_t len)
{
	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	return a->store ? a->store(sdp, buf, len) : len;
}

static const struct sysfs_ops gfs2_attr_ops = {
	.show  = gfs2_attr_show,
	.store = gfs2_attr_store,
};


static struct kset *gfs2_kset;

static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%u:%u\n",
			MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
}

static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
}

static int gfs2_uuid_valid(const u8 *uuid)
{
	int i;

	for (i = 0; i < 16; i++) {
		if (uuid[i])
			return 1;
	}
	return 0;
}

static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
{
	const u8 *uuid = sdp->sd_sb.sb_uuid;
	buf[0] = '\0';
	if (!gfs2_uuid_valid(uuid))
		return 0;
	return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
}

static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
{
	unsigned int count;

	mutex_lock(&sdp->sd_freeze_lock);
	count = sdp->sd_freeze_count;
	mutex_unlock(&sdp->sd_freeze_lock);

	return snprintf(buf, PAGE_SIZE, "%u\n", count);
}

static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	ssize_t ret = len;
	int error = 0;
	int n = simple_strtol(buf, NULL, 0);

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	switch (n) {
	case 0:
		gfs2_unfreeze_fs(sdp);
		break;
	case 1:
		error = gfs2_freeze_fs(sdp);
		break;
	default:
		ret = -EINVAL;
	}

	if (error)
		fs_warn(sdp, "freeze %d error %d", n, error);

	return ret;
}

static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
{
	unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
	return snprintf(buf, PAGE_SIZE, "%u\n", b);
}

static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	if (simple_strtol(buf, NULL, 0) != 1)
		return -EINVAL;

	gfs2_lm_withdraw(sdp,
		"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
		sdp->sd_fsname);
	return len;
}

static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
				 size_t len)
{
	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	if (simple_strtol(buf, NULL, 0) != 1)
		return -EINVAL;

	gfs2_statfs_sync(sdp->sd_vfs, 0);
	return len;
}

static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
				size_t len)
{
	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	if (simple_strtol(buf, NULL, 0) != 1)
		return -EINVAL;

	gfs2_quota_sync(sdp->sd_vfs, 0, 1);
	return len;
}

static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
					size_t len)
{
	int error;
	u32 id;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	id = simple_strtoul(buf, NULL, 0);

	error = gfs2_quota_refresh(sdp, 1, id);
	return error ? error : len;
}

static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
					 size_t len)
{
	int error;
	u32 id;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	id = simple_strtoul(buf, NULL, 0);

	error = gfs2_quota_refresh(sdp, 0, id);
	return error ? error : len;
}

static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	struct gfs2_glock *gl;
	const struct gfs2_glock_operations *glops;
	unsigned int glmode;
	unsigned int gltype;
	unsigned long long glnum;
	char mode[16];
	int rv;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
		    mode);
	if (rv != 3)
		return -EINVAL;

	if (strcmp(mode, "EX") == 0)
		glmode = LM_ST_UNLOCKED;
	else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
		glmode = LM_ST_DEFERRED;
	else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
		glmode = LM_ST_SHARED;
	else
		return -EINVAL;

	if (gltype > LM_TYPE_JOURNAL)
		return -EINVAL;
	glops = gfs2_glops_list[gltype];
	if (glops == NULL)
		return -EINVAL;
	if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
		fs_info(sdp, "demote interface used\n");
	rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
	if (rv)
		return rv;
	gfs2_glock_cb(gl, glmode);
	gfs2_glock_put(gl);
	return len;
}


#define GFS2_ATTR(name, mode, show, store) \
static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)

GFS2_ATTR(id,                  0444, id_show,       NULL);
GFS2_ATTR(fsname,              0444, fsname_show,   NULL);
GFS2_ATTR(uuid,                0444, uuid_show,     NULL);
GFS2_ATTR(freeze,              0644, freeze_show,   freeze_store);
GFS2_ATTR(withdraw,            0644, withdraw_show, withdraw_store);
GFS2_ATTR(statfs_sync,         0200, NULL,          statfs_sync_store);
GFS2_ATTR(quota_sync,          0200, NULL,          quota_sync_store);
GFS2_ATTR(quota_refresh_user,  0200, NULL,          quota_refresh_user_store);
GFS2_ATTR(quota_refresh_group, 0200, NULL,          quota_refresh_group_store);
GFS2_ATTR(demote_rq,           0200, NULL,	    demote_rq_store);

static struct attribute *gfs2_attrs[] = {
	&gfs2_attr_id.attr,
	&gfs2_attr_fsname.attr,
	&gfs2_attr_uuid.attr,
	&gfs2_attr_freeze.attr,
	&gfs2_attr_withdraw.attr,
	&gfs2_attr_statfs_sync.attr,
	&gfs2_attr_quota_sync.attr,
	&gfs2_attr_quota_refresh_user.attr,
	&gfs2_attr_quota_refresh_group.attr,
	&gfs2_attr_demote_rq.attr,
	NULL,
};

static struct kobj_type gfs2_ktype = {
	.default_attrs = gfs2_attrs,
	.sysfs_ops     = &gfs2_attr_ops,
};


/*
 * lock_module. Originally from lock_dlm
 */

static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
{
	const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
	return sprintf(buf, "%s\n", ops->lm_proto_name);
}

static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	ssize_t ret;
	int val = 0;

	if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
		val = 1;
	ret = sprintf(buf, "%d\n", val);
	return ret;
}

static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	ssize_t ret = len;
	int val;

	val = simple_strtol(buf, NULL, 0);

	if (val == 1)
		set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
	else if (val == 0) {
		clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
		smp_mb__after_clear_bit();
		gfs2_glock_thaw(sdp);
	} else {
		ret = -EINVAL;
	}
	return ret;
}

static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%d\n", ls->ls_first);
}

static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	unsigned first;
	int rv;

	rv = sscanf(buf, "%u", &first);
	if (rv != 1 || first > 1)
		return -EINVAL;
	spin_lock(&sdp->sd_jindex_spin);
	rv = -EBUSY;
	if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
		goto out;
	rv = -EINVAL;
	if (sdp->sd_args.ar_spectator)
		goto out;
	if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
		goto out;
        sdp->sd_lockstruct.ls_first = first;
        rv = 0;
out:
        spin_unlock(&sdp->sd_jindex_spin);
        return rv ? rv : len;
}

static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%d\n", ls->ls_first_done);
}

static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	unsigned jid;
	struct gfs2_jdesc *jd;
	int rv;

	rv = sscanf(buf, "%u", &jid);
	if (rv != 1)
		return -EINVAL;

	rv = -ESHUTDOWN;
	spin_lock(&sdp->sd_jindex_spin);
	if (test_bit(SDF_NORECOVERY, &sdp->sd_flags))
		goto out;
	rv = -EBUSY;
	if (sdp->sd_jdesc->jd_jid == jid)
		goto out;
	rv = -ENOENT;
	list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
		if (jd->jd_jid != jid)
			continue;
		rv = gfs2_recover_journal(jd, false);
		break;
	}
out:
	spin_unlock(&sdp->sd_jindex_spin);
	return rv ? rv : len;
}

static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
}

static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
}

static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
{
	return sprintf(buf, "%u\n", sdp->sd_lockstruct.ls_jid);
}

static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
        unsigned jid;
	int rv;

	rv = sscanf(buf, "%u", &jid);
	if (rv != 1)
		return -EINVAL;

	spin_lock(&sdp->sd_jindex_spin);
	rv = -EINVAL;
	if (sdp->sd_args.ar_spectator)
		goto out;
	if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
		goto out;
	rv = -EBUSY;
	if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
		goto out;
	sdp->sd_lockstruct.ls_jid = jid;
	smp_mb__after_clear_bit();
	wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
	rv = 0;
out:
	spin_unlock(&sdp->sd_jindex_spin);
	return rv ? rv : len;
}

#define GDLM_ATTR(_name,_mode,_show,_store) \
static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)

GDLM_ATTR(proto_name,		0444, proto_name_show,		NULL);
GDLM_ATTR(block,		0644, block_show,		block_store);
GDLM_ATTR(withdraw,		0644, withdraw_show,		withdraw_store);
GDLM_ATTR(jid,			0644, jid_show,			jid_store);
GDLM_ATTR(first,		0644, lkfirst_show,		lkfirst_store);
GDLM_ATTR(first_done,		0444, first_done_show,		NULL);
GDLM_ATTR(recover,		0600, NULL,			recover_store);
GDLM_ATTR(recover_done,		0444, recover_done_show,	NULL);
GDLM_ATTR(recover_status,	0444, recover_status_show,	NULL);

static struct attribute *lock_module_attrs[] = {
	&gdlm_attr_proto_name.attr,
	&gdlm_attr_block.attr,
	&gdlm_attr_withdraw.attr,
	&gdlm_attr_jid.attr,
	&gdlm_attr_first.attr,
	&gdlm_attr_first_done.attr,
	&gdlm_attr_recover.attr,
	&gdlm_attr_recover_done.attr,
	&gdlm_attr_recover_status.attr,
	NULL,
};

/*
 * get and set struct gfs2_tune fields
 */

static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%u %u\n",
			sdp->sd_tune.gt_quota_scale_num,
			sdp->sd_tune.gt_quota_scale_den);
}

static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
				 size_t len)
{
	struct gfs2_tune *gt = &sdp->sd_tune;
	unsigned int x, y;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
		return -EINVAL;

	spin_lock(&gt->gt_spin);
	gt->gt_quota_scale_num = x;
	gt->gt_quota_scale_den = y;
	spin_unlock(&gt->gt_spin);
	return len;
}

static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
			int check_zero, const char *buf, size_t len)
{
	struct gfs2_tune *gt = &sdp->sd_tune;
	unsigned int x;

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	x = simple_strtoul(buf, NULL, 0);

	if (check_zero && !x)
		return -EINVAL;

	spin_lock(&gt->gt_spin);
	*field = x;
	spin_unlock(&gt->gt_spin);
	return len;
}

#define TUNE_ATTR_3(name, show, store)                                        \
static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)

#define TUNE_ATTR_2(name, store)                                              \
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                   \
{                                                                             \
	return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name);      \
}                                                                             \
TUNE_ATTR_3(name, name##_show, store)

#define TUNE_ATTR(name, check_zero)                                           \
static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
{                                                                             \
	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len);  \
}                                                                             \
TUNE_ATTR_2(name, name##_store)

TUNE_ATTR(quota_warn_period, 0);
TUNE_ATTR(quota_quantum, 0);
TUNE_ATTR(max_readahead, 0);
TUNE_ATTR(complain_secs, 0);
TUNE_ATTR(statfs_slow, 0);
TUNE_ATTR(new_files_jdata, 0);
TUNE_ATTR(quota_simul_sync, 1);
TUNE_ATTR(statfs_quantum, 1);
TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);

static struct attribute *tune_attrs[] = {
	&tune_attr_quota_warn_period.attr,
	&tune_attr_quota_quantum.attr,
	&tune_attr_max_readahead.attr,
	&tune_attr_complain_secs.attr,
	&tune_attr_statfs_slow.attr,
	&tune_attr_quota_simul_sync.attr,
	&tune_attr_statfs_quantum.attr,
	&tune_attr_quota_scale.attr,
	&tune_attr_new_files_jdata.attr,
	NULL,
};

static struct attribute_group tune_group = {
	.name = "tune",
	.attrs = tune_attrs,
};

static struct attribute_group lock_module_group = {
	.name = "lock_module",
	.attrs = lock_module_attrs,
};

int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
{
	struct super_block *sb = sdp->sd_vfs;
	int error;
	char ro[20];
	char spectator[20];
	char *envp[] = { ro, spectator, NULL };

	sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
	sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);

	sdp->sd_kobj.kset = gfs2_kset;
	error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
				     "%s", sdp->sd_table_name);
	if (error)
		goto fail;

	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
	if (error)
		goto fail_reg;

	error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
	if (error)
		goto fail_tune;

	error = sysfs_create_link(&sdp->sd_kobj,
				  &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
				  "device");
	if (error)
		goto fail_lock_module;

	kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
	return 0;

fail_lock_module:
	sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
fail_tune:
	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
fail_reg:
	kobject_put(&sdp->sd_kobj);
fail:
	fs_err(sdp, "error %d adding sysfs files", error);
	return error;
}

void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
{
	sysfs_remove_link(&sdp->sd_kobj, "device");
	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
	sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
	kobject_put(&sdp->sd_kobj);
}

static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
		       struct kobj_uevent_env *env)
{
	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	const u8 *uuid = sdp->sd_sb.sb_uuid;

	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
	if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
		add_uevent_var(env, "JOURNALID=%u", sdp->sd_lockstruct.ls_jid);
	if (gfs2_uuid_valid(uuid))
		add_uevent_var(env, "UUID=%pUB", uuid);
	return 0;
}

static const struct kset_uevent_ops gfs2_uevent_ops = {
	.uevent = gfs2_uevent,
};

int gfs2_sys_init(void)
{
	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
	if (!gfs2_kset)
		return -ENOMEM;
	return 0;
}

void gfs2_sys_uninit(void)
{
	kset_unregister(gfs2_kset);
}
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
	9
	10	#include <linux/sched.h>
b3b94faa DT	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>
b3b94faa	16	#include <asm/uaccess.h>
f057f6cd	17	#include <linux/gfs2_ondisk.h>
31e54b01	18	#include <linux/genhd.h>
b3b94faa DT	19
b3b94faa DT	20	#include "gfs2.h"
5c676f6d	21	#include "incore.h"
b3b94faa DT	22	#include "sys.h"
	23	#include "super.h"
	24	#include "glock.h"
	25	#include "quota.h"
5c676f6d	26	#include "util.h"
64d576ba	27	#include "glops.h"
6ecd7c2d	28	#include "recovery.h"
b3b94faa	29
48c2b613 SW	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
	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
	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
52cf25d0	52	static const struct sysfs_ops gfs2_attr_ops = {
48c2b613 SW	53	.show = gfs2_attr_show,
	54	.store = gfs2_attr_store,
	55	};
	56
	57
	58	static struct kset *gfs2_kset;
	59
b3b94faa DT	60	static ssize_t id_show(struct gfs2_sbd sdp, char buf)
b3b94faa DT	61	{
c7227e46 BP	62	return snprintf(buf, PAGE_SIZE, "%u:%u\n",
c7227e46 BP	63	MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
b3b94faa DT	64	}
	65
	66	static ssize_t fsname_show(struct gfs2_sbd sdp, char buf)
	67	{
3204a6c0	68	return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
b3b94faa DT	69	}
b3b94faa DT	70
02e3cc70 SW	71	static int gfs2_uuid_valid(const u8 *uuid)
	72	{
	73	int i;
	74
	75	for (i = 0; i < 16; i++) {
	76	if (uuid[i])
	77	return 1;
	78	}
	79	return 0;
	80	}
	81
	82	static ssize_t uuid_show(struct gfs2_sbd sdp, char buf)
	83	{
	84	const u8 *uuid = sdp->sd_sb.sb_uuid;
	85	buf[0] = '\0';
	86	if (!gfs2_uuid_valid(uuid))
	87	return 0;
f0b34ae6	88	return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
02e3cc70 SW	89	}
02e3cc70 SW	90
b3b94faa DT	91	static ssize_t freeze_show(struct gfs2_sbd sdp, char buf)
	92	{
	93	unsigned int count;
	94
f55ab26a	95	mutex_lock(&sdp->sd_freeze_lock);
b3b94faa	96	count = sdp->sd_freeze_count;
f55ab26a	97	mutex_unlock(&sdp->sd_freeze_lock);
b3b94faa	98
3204a6c0	99	return snprintf(buf, PAGE_SIZE, "%u\n", count);
b3b94faa DT	100	}
	101
	102	static ssize_t freeze_store(struct gfs2_sbd sdp, const char buf, size_t len)
	103	{
	104	ssize_t ret = len;
	105	int error = 0;
	106	int n = simple_strtol(buf, NULL, 0);
	107
	108	if (!capable(CAP_SYS_ADMIN))
	109	return -EACCES;
	110
	111	switch (n) {
	112	case 0:
	113	gfs2_unfreeze_fs(sdp);
	114	break;
	115	case 1:
	116	error = gfs2_freeze_fs(sdp);
	117	break;
	118	default:
	119	ret = -EINVAL;
	120	}
	121
	122	if (error)
	123	fs_warn(sdp, "freeze %d error %d", n, error);
	124
	125	return ret;
	126	}
	127
	128	static ssize_t withdraw_show(struct gfs2_sbd sdp, char buf)
	129	{
	130	unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
3204a6c0	131	return snprintf(buf, PAGE_SIZE, "%u\n", b);
b3b94faa DT	132	}
	133
	134	static ssize_t withdraw_store(struct gfs2_sbd sdp, const char buf, size_t len)
	135	{
	136	if (!capable(CAP_SYS_ADMIN))
	137	return -EACCES;
	138
	139	if (simple_strtol(buf, NULL, 0) != 1)
	140	return -EINVAL;
	141
	142	gfs2_lm_withdraw(sdp,
	143	"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
	144	sdp->sd_fsname);
	145	return len;
	146	}
	147
	148	static ssize_t statfs_sync_store(struct gfs2_sbd sdp, const char buf,
	149	size_t len)
	150	{
	151	if (!capable(CAP_SYS_ADMIN))
	152	return -EACCES;
	153
	154	if (simple_strtol(buf, NULL, 0) != 1)
	155	return -EINVAL;
	156
8c42d637	157	gfs2_statfs_sync(sdp->sd_vfs, 0);
b3b94faa DT	158	return len;
	159	}
	160
b3b94faa DT	161	static ssize_t quota_sync_store(struct gfs2_sbd sdp, const char buf,
	162	size_t len)
	163	{
	164	if (!capable(CAP_SYS_ADMIN))
	165	return -EACCES;
	166
	167	if (simple_strtol(buf, NULL, 0) != 1)
	168	return -EINVAL;
	169
5fb324ad	170	gfs2_quota_sync(sdp->sd_vfs, 0, 1);
b3b94faa DT	171	return len;
	172	}
	173
	174	static ssize_t quota_refresh_user_store(struct gfs2_sbd sdp, const char buf,
	175	size_t len)
	176	{
ea762338	177	int error;
cd915493	178	u32 id;
b3b94faa DT	179
	180	if (!capable(CAP_SYS_ADMIN))
	181	return -EACCES;
	182
	183	id = simple_strtoul(buf, NULL, 0);
	184
ea762338 SW	185	error = gfs2_quota_refresh(sdp, 1, id);
ea762338 SW	186	return error ? error : len;
b3b94faa DT	187	}
	188
	189	static ssize_t quota_refresh_group_store(struct gfs2_sbd sdp, const char buf,
	190	size_t len)
	191	{
ea762338	192	int error;
cd915493	193	u32 id;
b3b94faa DT	194
	195	if (!capable(CAP_SYS_ADMIN))
	196	return -EACCES;
	197
	198	id = simple_strtoul(buf, NULL, 0);
	199
ea762338 SW	200	error = gfs2_quota_refresh(sdp, 0, id);
ea762338 SW	201	return error ? error : len;
b3b94faa DT	202	}
b3b94faa DT	203
64d576ba SW	204	static ssize_t demote_rq_store(struct gfs2_sbd sdp, const char buf, size_t len)
	205	{
	206	struct gfs2_glock *gl;
	207	const struct gfs2_glock_operations *glops;
	208	unsigned int glmode;
	209	unsigned int gltype;
	210	unsigned long long glnum;
	211	char mode[16];
	212	int rv;
	213
	214	if (!capable(CAP_SYS_ADMIN))
	215	return -EACCES;
	216
	217	rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
	218	mode);
	219	if (rv != 3)
	220	return -EINVAL;
	221
	222	if (strcmp(mode, "EX") == 0)
	223	glmode = LM_ST_UNLOCKED;
	224	else if ((strcmp(mode, "CW") == 0) \|\| (strcmp(mode, "DF") == 0))
	225	glmode = LM_ST_DEFERRED;
	226	else if ((strcmp(mode, "PR") == 0) \|\| (strcmp(mode, "SH") == 0))
	227	glmode = LM_ST_SHARED;
	228	else
	229	return -EINVAL;
	230
	231	if (gltype > LM_TYPE_JOURNAL)
	232	return -EINVAL;
	233	glops = gfs2_glops_list[gltype];
	234	if (glops == NULL)
	235	return -EINVAL;
6a99be5d	236	if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
913a71d2	237	fs_info(sdp, "demote interface used\n");
64d576ba SW	238	rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
	239	if (rv)
	240	return rv;
	241	gfs2_glock_cb(gl, glmode);
	242	gfs2_glock_put(gl);
	243	return len;
	244	}
	245
b3b94faa DT	246
	247	#define GFS2_ATTR(name, mode, show, store) \
	248	static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
	249
	250	GFS2_ATTR(id, 0444, id_show, NULL);
	251	GFS2_ATTR(fsname, 0444, fsname_show, NULL);
02e3cc70	252	GFS2_ATTR(uuid, 0444, uuid_show, NULL);
b3b94faa	253	GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
b3b94faa DT	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);
64d576ba	259	GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
b3b94faa DT	260
	261	static struct attribute *gfs2_attrs[] = {
	262	&gfs2_attr_id.attr,
	263	&gfs2_attr_fsname.attr,
02e3cc70	264	&gfs2_attr_uuid.attr,
b3b94faa	265	&gfs2_attr_freeze.attr,
b3b94faa DT	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,
64d576ba	271	&gfs2_attr_demote_rq.attr,
b3b94faa DT	272	NULL,
	273	};
	274
b3b94faa DT	275	static struct kobj_type gfs2_ktype = {
	276	.default_attrs = gfs2_attrs,
	277	.sysfs_ops = &gfs2_attr_ops,
	278	};
	279
f057f6cd SW	280
	281	/*
	282	* lock_module. Originally from lock_dlm
	283	*/
	284
	285	static ssize_t proto_name_show(struct gfs2_sbd sdp, char buf)
	286	{
	287	const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
	288	return sprintf(buf, "%s\n", ops->lm_proto_name);
	289	}
	290
	291	static ssize_t block_show(struct gfs2_sbd sdp, char buf)
	292	{
	293	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	294	ssize_t ret;
	295	int val = 0;
	296
	297	if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
	298	val = 1;
	299	ret = sprintf(buf, "%d\n", val);
	300	return ret;
	301	}
	302
	303	static ssize_t block_store(struct gfs2_sbd sdp, const char buf, size_t len)
	304	{
	305	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	306	ssize_t ret = len;
	307	int val;
	308
	309	val = simple_strtol(buf, NULL, 0);
	310
	311	if (val == 1)
	312	set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
	313	else if (val == 0) {
	314	clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
	315	smp_mb__after_clear_bit();
	316	gfs2_glock_thaw(sdp);
	317	} else {
	318	ret = -EINVAL;
	319	}
	320	return ret;
	321	}
	322
f057f6cd SW	323	static ssize_t lkfirst_show(struct gfs2_sbd sdp, char buf)
	324	{
	325	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	326	return sprintf(buf, "%d\n", ls->ls_first);
	327	}
	328
ba6e9364 SW	329	static ssize_t lkfirst_store(struct gfs2_sbd sdp, const char buf, size_t len)
	330	{
	331	unsigned first;
	332	int rv;
	333
	334	rv = sscanf(buf, "%u", &first);
	335	if (rv != 1 \|\| first > 1)
	336	return -EINVAL;
	337	spin_lock(&sdp->sd_jindex_spin);
	338	rv = -EBUSY;
	339	if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
	340	goto out;
	341	rv = -EINVAL;
	342	if (sdp->sd_args.ar_spectator)
	343	goto out;
	344	if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
	345	goto out;
	346	sdp->sd_lockstruct.ls_first = first;
	347	rv = 0;
	348	out:
	349	spin_unlock(&sdp->sd_jindex_spin);
	350	return rv ? rv : len;
	351	}
	352
f057f6cd SW	353	static ssize_t first_done_show(struct gfs2_sbd sdp, char buf)
	354	{
	355	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	356	return sprintf(buf, "%d\n", ls->ls_first_done);
	357	}
	358
fe64d517	359	static ssize_t recover_store(struct gfs2_sbd sdp, const char buf, size_t len)
f057f6cd	360	{
fe64d517	361	unsigned jid;
f057f6cd	362	struct gfs2_jdesc *jd;
fe64d517 SW	363	int rv;
	364
	365	rv = sscanf(buf, "%u", &jid);
	366	if (rv != 1)
	367	return -EINVAL;
f057f6cd	368
fe64d517	369	rv = -ESHUTDOWN;
f057f6cd	370	spin_lock(&sdp->sd_jindex_spin);
fe64d517 SW	371	if (test_bit(SDF_NORECOVERY, &sdp->sd_flags))
	372	goto out;
	373	rv = -EBUSY;
	374	if (sdp->sd_jdesc->jd_jid == jid)
	375	goto out;
	376	rv = -ENOENT;
f057f6cd SW	377	list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
	378	if (jd->jd_jid != jid)
	379	continue;
6ecd7c2d	380	rv = gfs2_recover_journal(jd, false);
f057f6cd SW	381	break;
f057f6cd SW	382	}
fe64d517	383	out:
f057f6cd	384	spin_unlock(&sdp->sd_jindex_spin);
fe64d517	385	return rv ? rv : len;
f057f6cd SW	386	}
	387
	388	static ssize_t recover_done_show(struct gfs2_sbd sdp, char buf)
	389	{
	390	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	391	return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
	392	}
	393
	394	static ssize_t recover_status_show(struct gfs2_sbd sdp, char buf)
	395	{
	396	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	397	return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
	398	}
	399
e1b28aab SW	400	static ssize_t jid_show(struct gfs2_sbd sdp, char buf)
	401	{
	402	return sprintf(buf, "%u\n", sdp->sd_lockstruct.ls_jid);
	403	}
	404
ba6e9364 SW	405	static ssize_t jid_store(struct gfs2_sbd sdp, const char buf, size_t len)
	406	{
	407	unsigned jid;
	408	int rv;
	409
	410	rv = sscanf(buf, "%u", &jid);
	411	if (rv != 1)
	412	return -EINVAL;
	413
	414	spin_lock(&sdp->sd_jindex_spin);
	415	rv = -EINVAL;
	416	if (sdp->sd_args.ar_spectator)
	417	goto out;
	418	if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
	419	goto out;
	420	rv = -EBUSY;
	421	if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
	422	goto out;
	423	sdp->sd_lockstruct.ls_jid = jid;
	424	smp_mb__after_clear_bit();
	425	wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
	426	rv = 0;
	427	out:
	428	spin_unlock(&sdp->sd_jindex_spin);
	429	return rv ? rv : len;
	430	}
	431
f057f6cd	432	#define GDLM_ATTR(_name,_mode,_show,_store) \
48c2b613	433	static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
f057f6cd	434
d7e623da SW	435	GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
	436	GDLM_ATTR(block, 0644, block_show, block_store);
	437	GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
ba6e9364 SW	438	GDLM_ATTR(jid, 0644, jid_show, jid_store);
ba6e9364 SW	439	GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
d7e623da SW	440	GDLM_ATTR(first_done, 0444, first_done_show, NULL);
	441	GDLM_ATTR(recover, 0600, NULL, recover_store);
	442	GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
	443	GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
f057f6cd SW	444
	445	static struct attribute *lock_module_attrs[] = {
	446	&gdlm_attr_proto_name.attr,
	447	&gdlm_attr_block.attr,
	448	&gdlm_attr_withdraw.attr,
e1b28aab	449	&gdlm_attr_jid.attr,
f057f6cd SW	450	&gdlm_attr_first.attr,
	451	&gdlm_attr_first_done.attr,
	452	&gdlm_attr_recover.attr,
	453	&gdlm_attr_recover_done.attr,
	454	&gdlm_attr_recover_status.attr,
ea67eedb	455	NULL,
b3b94faa DT	456	};
b3b94faa DT	457
b3b94faa DT	458	/*
	459	* get and set struct gfs2_tune fields
	460	*/
	461
	462	static ssize_t quota_scale_show(struct gfs2_sbd sdp, char buf)
	463	{
3204a6c0 DT	464	return snprintf(buf, PAGE_SIZE, "%u %u\n",
	465	sdp->sd_tune.gt_quota_scale_num,
	466	sdp->sd_tune.gt_quota_scale_den);
b3b94faa DT	467	}
	468
	469	static ssize_t quota_scale_store(struct gfs2_sbd sdp, const char buf,
	470	size_t len)
	471	{
	472	struct gfs2_tune *gt = &sdp->sd_tune;
	473	unsigned int x, y;
	474
	475	if (!capable(CAP_SYS_ADMIN))
	476	return -EACCES;
	477
	478	if (sscanf(buf, "%u %u", &x, &y) != 2 \|\| !y)
	479	return -EINVAL;
	480
	481	spin_lock(&gt->gt_spin);
	482	gt->gt_quota_scale_num = x;
	483	gt->gt_quota_scale_den = y;
	484	spin_unlock(&gt->gt_spin);
	485	return len;
	486	}
	487
	488	static ssize_t tune_set(struct gfs2_sbd sdp, unsigned int field,
	489	int check_zero, const char *buf, size_t len)
	490	{
	491	struct gfs2_tune *gt = &sdp->sd_tune;
	492	unsigned int x;
	493
	494	if (!capable(CAP_SYS_ADMIN))
	495	return -EACCES;
	496
	497	x = simple_strtoul(buf, NULL, 0);
	498
	499	if (check_zero && !x)
	500	return -EINVAL;
	501
	502	spin_lock(&gt->gt_spin);
	503	*field = x;
	504	spin_unlock(&gt->gt_spin);
	505	return len;
	506	}
	507
b3b94faa	508	#define TUNE_ATTR_3(name, show, store) \
48c2b613	509	static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
b3b94faa DT	510
	511	#define TUNE_ATTR_2(name, store) \
	512	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	513	{ \
3204a6c0	514	return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
b3b94faa DT	515	} \
	516	TUNE_ATTR_3(name, name##_show, store)
	517
	518	#define TUNE_ATTR(name, check_zero) \
	519	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	520	{ \
	521	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
	522	} \
	523	TUNE_ATTR_2(name, name##_store)
	524
b3b94faa DT	525	TUNE_ATTR(quota_warn_period, 0);
b3b94faa DT	526	TUNE_ATTR(quota_quantum, 0);
b3b94faa DT	527	TUNE_ATTR(max_readahead, 0);
b3b94faa DT	528	TUNE_ATTR(complain_secs, 0);
b3b94faa DT	529	TUNE_ATTR(statfs_slow, 0);
b3b94faa DT	530	TUNE_ATTR(new_files_jdata, 0);
b3b94faa	531	TUNE_ATTR(quota_simul_sync, 1);
b3b94faa	532	TUNE_ATTR(statfs_quantum, 1);
b3b94faa DT	533	TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
	534
	535	static struct attribute *tune_attrs[] = {
b3b94faa DT	536	&tune_attr_quota_warn_period.attr,
b3b94faa DT	537	&tune_attr_quota_quantum.attr,
b3b94faa DT	538	&tune_attr_max_readahead.attr,
b3b94faa DT	539	&tune_attr_complain_secs.attr,
b3b94faa DT	540	&tune_attr_statfs_slow.attr,
b3b94faa DT	541	&tune_attr_quota_simul_sync.attr,
b3b94faa	542	&tune_attr_statfs_quantum.attr,
b3b94faa DT	543	&tune_attr_quota_scale.attr,
b3b94faa DT	544	&tune_attr_new_files_jdata.attr,
ea67eedb	545	NULL,
b3b94faa DT	546	};
b3b94faa DT	547
b3b94faa DT	548	static struct attribute_group tune_group = {
b3b94faa DT	549	.name = "tune",
ea67eedb	550	.attrs = tune_attrs,
b3b94faa DT	551	};
b3b94faa DT	552
f057f6cd SW	553	static struct attribute_group lock_module_group = {
	554	.name = "lock_module",
	555	.attrs = lock_module_attrs,
	556	};
	557
b3b94faa DT	558	int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
b3b94faa DT	559	{
440d6da2	560	struct super_block *sb = sdp->sd_vfs;
b3b94faa	561	int error;
440d6da2 SW	562	char ro[20];
	563	char spectator[20];
	564	char *envp[] = { ro, spectator, NULL };
	565
	566	sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
	567	sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
b3b94faa	568
9bec101a	569	sdp->sd_kobj.kset = gfs2_kset;
901195ed GKH	570	error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
901195ed GKH	571	"%s", sdp->sd_table_name);
b3b94faa DT	572	if (error)
	573	goto fail;
	574
b3b94faa DT	575	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
b3b94faa DT	576	if (error)
f6eb5349	577	goto fail_reg;
b3b94faa	578
f057f6cd SW	579	error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
	580	if (error)
	581	goto fail_tune;
	582
31e54b01 SW	583	error = sysfs_create_link(&sdp->sd_kobj,
	584	&disk_to_dev(sb->s_bdev->bd_disk)->kobj,
	585	"device");
	586	if (error)
	587	goto fail_lock_module;
	588
440d6da2	589	kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
b3b94faa DT	590	return 0;
b3b94faa DT	591
31e54b01 SW	592	fail_lock_module:
31e54b01 SW	593	sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
f057f6cd SW	594	fail_tune:
f057f6cd SW	595	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
a91ea69f	596	fail_reg:
197b12d6	597	kobject_put(&sdp->sd_kobj);
a91ea69f	598	fail:
65952fb4	599	fs_err(sdp, "error %d adding sysfs files", error);
b3b94faa DT	600	return error;
	601	}
	602
	603	void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
	604	{
31e54b01	605	sysfs_remove_link(&sdp->sd_kobj, "device");
b3b94faa	606	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
f057f6cd	607	sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
197b12d6	608	kobject_put(&sdp->sd_kobj);
b3b94faa DT	609	}
b3b94faa DT	610
fdd1062e SW	611	static int gfs2_uevent(struct kset kset, struct kobject kobj,
	612	struct kobj_uevent_env *env)
	613	{
	614	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
02e3cc70 SW	615	const u8 *uuid = sdp->sd_sb.sb_uuid;
02e3cc70 SW	616
fdd1062e SW	617	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
fdd1062e SW	618	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
ba6e9364	619	if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
440d6da2	620	add_uevent_var(env, "JOURNALID=%u", sdp->sd_lockstruct.ls_jid);
f0b34ae6 JP	621	if (gfs2_uuid_valid(uuid))
f0b34ae6 JP	622	add_uevent_var(env, "UUID=%pUB", uuid);
fdd1062e SW	623	return 0;
	624	}
	625
9cd43611	626	static const struct kset_uevent_ops gfs2_uevent_ops = {
fdd1062e SW	627	.uevent = gfs2_uevent,
	628	};
	629
b3b94faa DT	630	int gfs2_sys_init(void)
b3b94faa DT	631	{
fdd1062e	632	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
9bec101a GKH	633	if (!gfs2_kset)
	634	return -ENOMEM;
	635	return 0;
b3b94faa DT	636	}
	637
	638	void gfs2_sys_uninit(void)
	639	{
9bec101a	640	kset_unregister(gfs2_kset);
b3b94faa DT	641	}
b3b94faa DT	642