[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;
	if (gltype == LM_TYPE_NONDISK && glnum == GFS2_TRANS_LOCK)
		glops = &gfs2_trans_glops;
	else
		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, "%d\n", sdp->sd_lockstruct.ls_jid);
}

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

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

	spin_lock(&sdp->sd_jindex_spin);
	rv = -EINVAL;
	if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
		goto out;
	rv = -EBUSY;
	if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
		goto out;
	rv = 0;
	if (sdp->sd_args.ar_spectator && jid > 0)
		rv = jid = -EINVAL;
	sdp->sd_lockstruct.ls_jid = jid;
	clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
	smp_mb__after_clear_bit();
	wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
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=%d", 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;
13466985 SW	233	if (gltype == LM_TYPE_NONDISK && glnum == GFS2_TRANS_LOCK)
	234	glops = &gfs2_trans_glops;
	235	else
	236	glops = gfs2_glops_list[gltype];
64d576ba SW	237	if (glops == NULL)
64d576ba SW	238	return -EINVAL;
6a99be5d	239	if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
913a71d2	240	fs_info(sdp, "demote interface used\n");
64d576ba SW	241	rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
	242	if (rv)
	243	return rv;
	244	gfs2_glock_cb(gl, glmode);
	245	gfs2_glock_put(gl);
	246	return len;
	247	}
	248
b3b94faa DT	249
	250	#define GFS2_ATTR(name, mode, show, store) \
	251	static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
	252
	253	GFS2_ATTR(id, 0444, id_show, NULL);
	254	GFS2_ATTR(fsname, 0444, fsname_show, NULL);
02e3cc70	255	GFS2_ATTR(uuid, 0444, uuid_show, NULL);
b3b94faa	256	GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
b3b94faa DT	257	GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
	258	GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
	259	GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
	260	GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
	261	GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
64d576ba	262	GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
b3b94faa DT	263
	264	static struct attribute *gfs2_attrs[] = {
	265	&gfs2_attr_id.attr,
	266	&gfs2_attr_fsname.attr,
02e3cc70	267	&gfs2_attr_uuid.attr,
b3b94faa	268	&gfs2_attr_freeze.attr,
b3b94faa DT	269	&gfs2_attr_withdraw.attr,
	270	&gfs2_attr_statfs_sync.attr,
	271	&gfs2_attr_quota_sync.attr,
	272	&gfs2_attr_quota_refresh_user.attr,
	273	&gfs2_attr_quota_refresh_group.attr,
64d576ba	274	&gfs2_attr_demote_rq.attr,
b3b94faa DT	275	NULL,
	276	};
	277
b3b94faa DT	278	static struct kobj_type gfs2_ktype = {
	279	.default_attrs = gfs2_attrs,
	280	.sysfs_ops = &gfs2_attr_ops,
	281	};
	282
f057f6cd SW	283
	284	/*
	285	* lock_module. Originally from lock_dlm
	286	*/
	287
	288	static ssize_t proto_name_show(struct gfs2_sbd sdp, char buf)
	289	{
	290	const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
	291	return sprintf(buf, "%s\n", ops->lm_proto_name);
	292	}
	293
	294	static ssize_t block_show(struct gfs2_sbd sdp, char buf)
	295	{
	296	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	297	ssize_t ret;
	298	int val = 0;
	299
	300	if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
	301	val = 1;
	302	ret = sprintf(buf, "%d\n", val);
	303	return ret;
	304	}
	305
	306	static ssize_t block_store(struct gfs2_sbd sdp, const char buf, size_t len)
	307	{
	308	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	309	ssize_t ret = len;
	310	int val;
	311
	312	val = simple_strtol(buf, NULL, 0);
	313
	314	if (val == 1)
	315	set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
	316	else if (val == 0) {
	317	clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
	318	smp_mb__after_clear_bit();
	319	gfs2_glock_thaw(sdp);
	320	} else {
	321	ret = -EINVAL;
	322	}
	323	return ret;
	324	}
	325
f057f6cd SW	326	static ssize_t lkfirst_show(struct gfs2_sbd sdp, char buf)
	327	{
	328	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	329	return sprintf(buf, "%d\n", ls->ls_first);
	330	}
	331
ba6e9364 SW	332	static ssize_t lkfirst_store(struct gfs2_sbd sdp, const char buf, size_t len)
	333	{
	334	unsigned first;
	335	int rv;
	336
	337	rv = sscanf(buf, "%u", &first);
	338	if (rv != 1 \|\| first > 1)
	339	return -EINVAL;
	340	spin_lock(&sdp->sd_jindex_spin);
	341	rv = -EBUSY;
	342	if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
	343	goto out;
	344	rv = -EINVAL;
	345	if (sdp->sd_args.ar_spectator)
	346	goto out;
	347	if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
	348	goto out;
	349	sdp->sd_lockstruct.ls_first = first;
	350	rv = 0;
	351	out:
	352	spin_unlock(&sdp->sd_jindex_spin);
	353	return rv ? rv : len;
	354	}
	355
f057f6cd SW	356	static ssize_t first_done_show(struct gfs2_sbd sdp, char buf)
	357	{
	358	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	359	return sprintf(buf, "%d\n", ls->ls_first_done);
	360	}
	361
fe64d517	362	static ssize_t recover_store(struct gfs2_sbd sdp, const char buf, size_t len)
f057f6cd	363	{
fe64d517	364	unsigned jid;
f057f6cd	365	struct gfs2_jdesc *jd;
fe64d517 SW	366	int rv;
	367
	368	rv = sscanf(buf, "%u", &jid);
	369	if (rv != 1)
	370	return -EINVAL;
f057f6cd	371
fe64d517	372	rv = -ESHUTDOWN;
f057f6cd	373	spin_lock(&sdp->sd_jindex_spin);
fe64d517 SW	374	if (test_bit(SDF_NORECOVERY, &sdp->sd_flags))
	375	goto out;
	376	rv = -EBUSY;
	377	if (sdp->sd_jdesc->jd_jid == jid)
	378	goto out;
	379	rv = -ENOENT;
f057f6cd SW	380	list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
	381	if (jd->jd_jid != jid)
	382	continue;
6ecd7c2d	383	rv = gfs2_recover_journal(jd, false);
f057f6cd SW	384	break;
f057f6cd SW	385	}
fe64d517	386	out:
f057f6cd	387	spin_unlock(&sdp->sd_jindex_spin);
fe64d517	388	return rv ? rv : len;
f057f6cd SW	389	}
	390
	391	static ssize_t recover_done_show(struct gfs2_sbd sdp, char buf)
	392	{
	393	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	394	return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
	395	}
	396
	397	static ssize_t recover_status_show(struct gfs2_sbd sdp, char buf)
	398	{
	399	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	400	return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
	401	}
	402
e1b28aab SW	403	static ssize_t jid_show(struct gfs2_sbd sdp, char buf)
e1b28aab SW	404	{
feb47ca9	405	return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
e1b28aab SW	406	}
e1b28aab SW	407
ba6e9364 SW	408	static ssize_t jid_store(struct gfs2_sbd sdp, const char buf, size_t len)
ba6e9364 SW	409	{
feb47ca9	410	int jid;
ba6e9364 SW	411	int rv;
ba6e9364 SW	412
feb47ca9	413	rv = sscanf(buf, "%d", &jid);
ba6e9364 SW	414	if (rv != 1)
	415	return -EINVAL;
	416
	417	spin_lock(&sdp->sd_jindex_spin);
	418	rv = -EINVAL;
ba6e9364 SW	419	if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
	420	goto out;
	421	rv = -EBUSY;
feb47ca9	422	if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
ba6e9364	423	goto out;
feb47ca9 SW	424	rv = 0;
	425	if (sdp->sd_args.ar_spectator && jid > 0)
	426	rv = jid = -EINVAL;
ba6e9364	427	sdp->sd_lockstruct.ls_jid = jid;
feb47ca9	428	clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
ba6e9364 SW	429	smp_mb__after_clear_bit();
ba6e9364 SW	430	wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
ba6e9364 SW	431	out:
	432	spin_unlock(&sdp->sd_jindex_spin);
	433	return rv ? rv : len;
	434	}
	435
f057f6cd	436	#define GDLM_ATTR(_name,_mode,_show,_store) \
48c2b613	437	static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
f057f6cd	438
d7e623da SW	439	GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
	440	GDLM_ATTR(block, 0644, block_show, block_store);
	441	GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
ba6e9364 SW	442	GDLM_ATTR(jid, 0644, jid_show, jid_store);
ba6e9364 SW	443	GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
d7e623da SW	444	GDLM_ATTR(first_done, 0444, first_done_show, NULL);
	445	GDLM_ATTR(recover, 0600, NULL, recover_store);
	446	GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
	447	GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
f057f6cd SW	448
	449	static struct attribute *lock_module_attrs[] = {
	450	&gdlm_attr_proto_name.attr,
	451	&gdlm_attr_block.attr,
	452	&gdlm_attr_withdraw.attr,
e1b28aab	453	&gdlm_attr_jid.attr,
f057f6cd SW	454	&gdlm_attr_first.attr,
	455	&gdlm_attr_first_done.attr,
	456	&gdlm_attr_recover.attr,
	457	&gdlm_attr_recover_done.attr,
	458	&gdlm_attr_recover_status.attr,
ea67eedb	459	NULL,
b3b94faa DT	460	};
b3b94faa DT	461
b3b94faa DT	462	/*
	463	* get and set struct gfs2_tune fields
	464	*/
	465
	466	static ssize_t quota_scale_show(struct gfs2_sbd sdp, char buf)
	467	{
3204a6c0 DT	468	return snprintf(buf, PAGE_SIZE, "%u %u\n",
	469	sdp->sd_tune.gt_quota_scale_num,
	470	sdp->sd_tune.gt_quota_scale_den);
b3b94faa DT	471	}
	472
	473	static ssize_t quota_scale_store(struct gfs2_sbd sdp, const char buf,
	474	size_t len)
	475	{
	476	struct gfs2_tune *gt = &sdp->sd_tune;
	477	unsigned int x, y;
	478
	479	if (!capable(CAP_SYS_ADMIN))
	480	return -EACCES;
	481
	482	if (sscanf(buf, "%u %u", &x, &y) != 2 \|\| !y)
	483	return -EINVAL;
	484
	485	spin_lock(&gt->gt_spin);
	486	gt->gt_quota_scale_num = x;
	487	gt->gt_quota_scale_den = y;
	488	spin_unlock(&gt->gt_spin);
	489	return len;
	490	}
	491
	492	static ssize_t tune_set(struct gfs2_sbd sdp, unsigned int field,
	493	int check_zero, const char *buf, size_t len)
	494	{
	495	struct gfs2_tune *gt = &sdp->sd_tune;
	496	unsigned int x;
	497
	498	if (!capable(CAP_SYS_ADMIN))
	499	return -EACCES;
	500
	501	x = simple_strtoul(buf, NULL, 0);
	502
	503	if (check_zero && !x)
	504	return -EINVAL;
	505
	506	spin_lock(&gt->gt_spin);
	507	*field = x;
	508	spin_unlock(&gt->gt_spin);
	509	return len;
	510	}
	511
b3b94faa	512	#define TUNE_ATTR_3(name, show, store) \
48c2b613	513	static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
b3b94faa DT	514
	515	#define TUNE_ATTR_2(name, store) \
	516	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	517	{ \
3204a6c0	518	return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
b3b94faa DT	519	} \
	520	TUNE_ATTR_3(name, name##_show, store)
	521
	522	#define TUNE_ATTR(name, check_zero) \
	523	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	524	{ \
	525	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
	526	} \
	527	TUNE_ATTR_2(name, name##_store)
	528
b3b94faa DT	529	TUNE_ATTR(quota_warn_period, 0);
b3b94faa DT	530	TUNE_ATTR(quota_quantum, 0);
b3b94faa DT	531	TUNE_ATTR(max_readahead, 0);
b3b94faa DT	532	TUNE_ATTR(complain_secs, 0);
b3b94faa DT	533	TUNE_ATTR(statfs_slow, 0);
b3b94faa DT	534	TUNE_ATTR(new_files_jdata, 0);
b3b94faa	535	TUNE_ATTR(quota_simul_sync, 1);
b3b94faa	536	TUNE_ATTR(statfs_quantum, 1);
b3b94faa DT	537	TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
	538
	539	static struct attribute *tune_attrs[] = {
b3b94faa DT	540	&tune_attr_quota_warn_period.attr,
b3b94faa DT	541	&tune_attr_quota_quantum.attr,
b3b94faa DT	542	&tune_attr_max_readahead.attr,
b3b94faa DT	543	&tune_attr_complain_secs.attr,
b3b94faa DT	544	&tune_attr_statfs_slow.attr,
b3b94faa DT	545	&tune_attr_quota_simul_sync.attr,
b3b94faa	546	&tune_attr_statfs_quantum.attr,
b3b94faa DT	547	&tune_attr_quota_scale.attr,
b3b94faa DT	548	&tune_attr_new_files_jdata.attr,
ea67eedb	549	NULL,
b3b94faa DT	550	};
b3b94faa DT	551
b3b94faa DT	552	static struct attribute_group tune_group = {
b3b94faa DT	553	.name = "tune",
ea67eedb	554	.attrs = tune_attrs,
b3b94faa DT	555	};
b3b94faa DT	556
f057f6cd SW	557	static struct attribute_group lock_module_group = {
	558	.name = "lock_module",
	559	.attrs = lock_module_attrs,
	560	};
	561
b3b94faa DT	562	int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
b3b94faa DT	563	{
440d6da2	564	struct super_block *sb = sdp->sd_vfs;
b3b94faa	565	int error;
440d6da2 SW	566	char ro[20];
	567	char spectator[20];
	568	char *envp[] = { ro, spectator, NULL };
	569
	570	sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
	571	sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
b3b94faa	572
9bec101a	573	sdp->sd_kobj.kset = gfs2_kset;
901195ed GKH	574	error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
901195ed GKH	575	"%s", sdp->sd_table_name);
b3b94faa DT	576	if (error)
	577	goto fail;
	578
b3b94faa DT	579	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
b3b94faa DT	580	if (error)
f6eb5349	581	goto fail_reg;
b3b94faa	582
f057f6cd SW	583	error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
	584	if (error)
	585	goto fail_tune;
	586
31e54b01 SW	587	error = sysfs_create_link(&sdp->sd_kobj,
	588	&disk_to_dev(sb->s_bdev->bd_disk)->kobj,
	589	"device");
	590	if (error)
	591	goto fail_lock_module;
	592
440d6da2	593	kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
b3b94faa DT	594	return 0;
b3b94faa DT	595
31e54b01 SW	596	fail_lock_module:
31e54b01 SW	597	sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
f057f6cd SW	598	fail_tune:
f057f6cd SW	599	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
a91ea69f	600	fail_reg:
197b12d6	601	kobject_put(&sdp->sd_kobj);
a91ea69f	602	fail:
65952fb4	603	fs_err(sdp, "error %d adding sysfs files", error);
b3b94faa DT	604	return error;
	605	}
	606
	607	void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
	608	{
31e54b01	609	sysfs_remove_link(&sdp->sd_kobj, "device");
b3b94faa	610	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
f057f6cd	611	sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
197b12d6	612	kobject_put(&sdp->sd_kobj);
b3b94faa DT	613	}
b3b94faa DT	614
fdd1062e SW	615	static int gfs2_uevent(struct kset kset, struct kobject kobj,
	616	struct kobj_uevent_env *env)
	617	{
	618	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
02e3cc70 SW	619	const u8 *uuid = sdp->sd_sb.sb_uuid;
02e3cc70 SW	620
fdd1062e SW	621	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
fdd1062e SW	622	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
ba6e9364	623	if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
feb47ca9	624	add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
f0b34ae6 JP	625	if (gfs2_uuid_valid(uuid))
f0b34ae6 JP	626	add_uevent_var(env, "UUID=%pUB", uuid);
fdd1062e SW	627	return 0;
	628	}
	629
9cd43611	630	static const struct kset_uevent_ops gfs2_uevent_ops = {
fdd1062e SW	631	.uevent = gfs2_uevent,
	632	};
	633
b3b94faa DT	634	int gfs2_sys_init(void)
b3b94faa DT	635	{
fdd1062e	636	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
9bec101a GKH	637	if (!gfs2_kset)
	638	return -ENOMEM;
	639	return 0;
b3b94faa DT	640	}
	641
	642	void gfs2_sys_uninit(void)
	643	{
9bec101a	644	kset_unregister(gfs2_kset);
b3b94faa DT	645	}
b3b94faa DT	646