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

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2005 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 v.2.
 */

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

#include "gfs2.h"
#include "lm.h"
#include "sys.h"
#include "super.h"
#include "glock.h"
#include "quota.h"

char *gfs2_sys_margs;
spinlock_t gfs2_sys_margs_lock;

static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
{
	return sprintf(buf, "%s\n", sdp->sd_vfs->s_id);
}

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

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

	down(&sdp->sd_freeze_lock);
	count = sdp->sd_freeze_count;
	up(&sdp->sd_freeze_lock);

	return sprintf(buf, "%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 sprintf(buf, "%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);
	return len;
}

static ssize_t shrink_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_gl_hash_clear(sdp, NO_WAIT);
	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);
	return len;
}

static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
					size_t len)
{
	uint32_t id;

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

	id = simple_strtoul(buf, NULL, 0);

	gfs2_quota_refresh(sdp, 1, id);
	return len;
}

static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
					 size_t len)
{
	uint32_t id;

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

	id = simple_strtoul(buf, NULL, 0);

	gfs2_quota_refresh(sdp, 0, id);
	return len;
}

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

#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(freeze,              0644, freeze_show,   freeze_store);
GFS2_ATTR(shrink,              0200, NULL,          shrink_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);

static struct attribute *gfs2_attrs[] = {
	&gfs2_attr_id.attr,
	&gfs2_attr_fsname.attr,
	&gfs2_attr_freeze.attr,
	&gfs2_attr_shrink.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,
	NULL,
};

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

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

static struct kset gfs2_kset = {
	.subsys = &fs_subsys,
	.kobj   = {.name = "gfs2",},
	.ktype  = &gfs2_ktype,
};

/*
 * display struct lm_lockstruct fields
 */

struct lockstruct_attr {
	struct attribute attr;
	ssize_t (*show)(struct gfs2_sbd *, char *);
};

#define LOCKSTRUCT_ATTR(name, fmt)                                          \
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                 \
{                                                                           \
	return sprintf(buf, fmt, sdp->sd_lockstruct.ls_##name);             \
}                                                                           \
static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)

LOCKSTRUCT_ATTR(jid,      "%u\n");
LOCKSTRUCT_ATTR(first,    "%u\n");
LOCKSTRUCT_ATTR(lvb_size, "%u\n");
LOCKSTRUCT_ATTR(flags,    "%d\n");

static struct attribute *lockstruct_attrs[] = {
	&lockstruct_attr_jid.attr,
	&lockstruct_attr_first.attr,
	&lockstruct_attr_lvb_size.attr,
	&lockstruct_attr_flags.attr,
	NULL
};

/*
 * display struct gfs2_args fields
 */

struct args_attr {
	struct attribute attr;
	ssize_t (*show)(struct gfs2_sbd *, char *);
};

#define ARGS_ATTR(name, fmt)                                                \
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                 \
{                                                                           \
	return sprintf(buf, fmt, sdp->sd_args.ar_##name);                   \
}                                                                           \
static struct args_attr args_attr_##name = __ATTR_RO(name)

ARGS_ATTR(lockproto,       "%s\n");
ARGS_ATTR(locktable,       "%s\n");
ARGS_ATTR(hostdata,        "%s\n");
ARGS_ATTR(spectator,       "%d\n");
ARGS_ATTR(ignore_local_fs, "%d\n");
ARGS_ATTR(localcaching,    "%d\n");
ARGS_ATTR(localflocks,     "%d\n");
ARGS_ATTR(debug,           "%d\n");
ARGS_ATTR(upgrade,         "%d\n");
ARGS_ATTR(num_glockd,      "%u\n");
ARGS_ATTR(posix_acl,       "%d\n");
ARGS_ATTR(quota,           "%u\n");
ARGS_ATTR(suiddir,         "%d\n");
ARGS_ATTR(data,            "%d\n");

/* one oddball doesn't fit the macro mold */
static ssize_t noatime_show(struct gfs2_sbd *sdp, char *buf)
{
	return sprintf(buf, "%d\n", !!test_bit(SDF_NOATIME, &sdp->sd_flags));
}
static struct args_attr args_attr_noatime = __ATTR_RO(noatime);

static struct attribute *args_attrs[] = {
	&args_attr_lockproto.attr,
	&args_attr_locktable.attr,
	&args_attr_hostdata.attr,
	&args_attr_spectator.attr,
	&args_attr_ignore_local_fs.attr,
	&args_attr_localcaching.attr,
	&args_attr_localflocks.attr,
	&args_attr_debug.attr,
	&args_attr_upgrade.attr,
	&args_attr_num_glockd.attr,
	&args_attr_posix_acl.attr,
	&args_attr_quota.attr,
	&args_attr_suiddir.attr,
	&args_attr_data.attr,
	&args_attr_noatime.attr,
	NULL
};

/*
 * display counters from superblock
 */

struct counters_attr {
	struct attribute attr;
	ssize_t (*show)(struct gfs2_sbd *, char *);
};

#define COUNTERS_ATTR_GENERAL(name, fmt, val)                               \
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                 \
{                                                                           \
	return sprintf(buf, fmt, val);                                      \
}                                                                           \
static struct counters_attr counters_attr_##name = __ATTR_RO(name)

#define COUNTERS_ATTR_SIMPLE(name, fmt) \
	COUNTERS_ATTR_GENERAL(name, fmt, sdp->sd_##name)

#define COUNTERS_ATTR_ATOMIC(name, fmt) \
	COUNTERS_ATTR_GENERAL(name, fmt, (unsigned int)atomic_read(&sdp->sd_##name))

COUNTERS_ATTR_ATOMIC(glock_count,          "%u\n");
COUNTERS_ATTR_ATOMIC(glock_held_count,     "%u\n");
COUNTERS_ATTR_ATOMIC(inode_count,          "%u\n");
COUNTERS_ATTR_ATOMIC(bufdata_count,        "%u\n");
COUNTERS_ATTR_ATOMIC(unlinked_count,       "%u\n");
COUNTERS_ATTR_ATOMIC(quota_count,          "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_gl,           "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_buf,          "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_revoke,       "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_rg,           "%u\n");
COUNTERS_ATTR_SIMPLE(log_num_databuf,      "%u\n");
COUNTERS_ATTR_SIMPLE(log_blks_free,        "%u\n");
COUNTERS_ATTR_GENERAL(jd_blocks,           "%u\n", sdp->sd_jdesc->jd_blocks);
COUNTERS_ATTR_ATOMIC(reclaim_count,        "%u\n");
COUNTERS_ATTR_SIMPLE(log_wraps,            "%llu\n");
COUNTERS_ATTR_ATOMIC(fh2dentry_misses,     "%u\n");
COUNTERS_ATTR_ATOMIC(reclaimed,            "%u\n");
COUNTERS_ATTR_ATOMIC(log_flush_incore,     "%u\n");
COUNTERS_ATTR_ATOMIC(log_flush_ondisk,     "%u\n");
COUNTERS_ATTR_ATOMIC(glock_nq_calls,       "%u\n");
COUNTERS_ATTR_ATOMIC(glock_dq_calls,       "%u\n");
COUNTERS_ATTR_ATOMIC(glock_prefetch_calls, "%u\n");
COUNTERS_ATTR_ATOMIC(lm_lock_calls,        "%u\n");
COUNTERS_ATTR_ATOMIC(lm_unlock_calls,      "%u\n");
COUNTERS_ATTR_ATOMIC(lm_callbacks,         "%u\n");
COUNTERS_ATTR_ATOMIC(ops_address,          "%u\n");
COUNTERS_ATTR_ATOMIC(ops_dentry,           "%u\n");
COUNTERS_ATTR_ATOMIC(ops_export,           "%u\n");
COUNTERS_ATTR_ATOMIC(ops_file,             "%u\n");
COUNTERS_ATTR_ATOMIC(ops_inode,            "%u\n");
COUNTERS_ATTR_ATOMIC(ops_super,            "%u\n");
COUNTERS_ATTR_ATOMIC(ops_vm,               "%u\n");

static struct attribute *counters_attrs[] = {
	&counters_attr_glock_count.attr,
	&counters_attr_glock_held_count.attr,
	&counters_attr_inode_count.attr,
	&counters_attr_bufdata_count.attr,
	&counters_attr_unlinked_count.attr,
	&counters_attr_quota_count.attr,
	&counters_attr_log_num_gl.attr,
	&counters_attr_log_num_buf.attr,
	&counters_attr_log_num_revoke.attr,
	&counters_attr_log_num_rg.attr,
	&counters_attr_log_num_databuf.attr,
	&counters_attr_log_blks_free.attr,
	&counters_attr_jd_blocks.attr,
	&counters_attr_reclaim_count.attr,
	&counters_attr_log_wraps.attr,
	&counters_attr_fh2dentry_misses.attr,
	&counters_attr_reclaimed.attr,
	&counters_attr_log_flush_incore.attr,
	&counters_attr_log_flush_ondisk.attr,
	&counters_attr_glock_nq_calls.attr,
	&counters_attr_glock_dq_calls.attr,
	&counters_attr_glock_prefetch_calls.attr,
	&counters_attr_lm_lock_calls.attr,
	&counters_attr_lm_unlock_calls.attr,
	&counters_attr_lm_callbacks.attr,
	&counters_attr_ops_address.attr,
	&counters_attr_ops_dentry.attr,
	&counters_attr_ops_export.attr,
	&counters_attr_ops_file.attr,
	&counters_attr_ops_inode.attr,
	&counters_attr_ops_super.attr,
	&counters_attr_ops_vm.attr,
	NULL
};

/*
 * get and set struct gfs2_tune fields
 */

static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
{
	return sprintf(buf, "%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;
}

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

#define TUNE_ATTR_3(name, show, store)                                        \
static struct tune_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 sprintf(buf, "%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)

#define TUNE_ATTR_DAEMON(name, process)                                       \
static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
{                                                                             \
	ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len);      \
	wake_up_process(sdp->sd_##process);                                   \
	return r;                                                             \
}                                                                             \
TUNE_ATTR_2(name, name##_store)

TUNE_ATTR(ilimit, 0);
TUNE_ATTR(ilimit_tries, 0);
TUNE_ATTR(ilimit_min, 0);
TUNE_ATTR(demote_secs, 0);
TUNE_ATTR(incore_log_blocks, 0);
TUNE_ATTR(log_flush_secs, 0);
TUNE_ATTR(jindex_refresh_secs, 0);
TUNE_ATTR(quota_warn_period, 0);
TUNE_ATTR(quota_quantum, 0);
TUNE_ATTR(atime_quantum, 0);
TUNE_ATTR(max_readahead, 0);
TUNE_ATTR(complain_secs, 0);
TUNE_ATTR(reclaim_limit, 0);
TUNE_ATTR(prefetch_secs, 0);
TUNE_ATTR(statfs_slow, 0);
TUNE_ATTR(new_files_jdata, 0);
TUNE_ATTR(new_files_directio, 0);
TUNE_ATTR(quota_simul_sync, 1);
TUNE_ATTR(quota_cache_secs, 1);
TUNE_ATTR(max_atomic_write, 1);
TUNE_ATTR(stall_secs, 1);
TUNE_ATTR(entries_per_readdir, 1);
TUNE_ATTR(greedy_default, 1);
TUNE_ATTR(greedy_quantum, 1);
TUNE_ATTR(greedy_max, 1);
TUNE_ATTR(statfs_quantum, 1);
TUNE_ATTR_DAEMON(scand_secs, scand_process);
TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
TUNE_ATTR_DAEMON(logd_secs, logd_process);
TUNE_ATTR_DAEMON(quotad_secs, quotad_process);
TUNE_ATTR_DAEMON(inoded_secs, inoded_process);
TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);

static struct attribute *tune_attrs[] = {
	&tune_attr_ilimit.attr,
	&tune_attr_ilimit_tries.attr,
	&tune_attr_ilimit_min.attr,
	&tune_attr_demote_secs.attr,
	&tune_attr_incore_log_blocks.attr,
	&tune_attr_log_flush_secs.attr,
	&tune_attr_jindex_refresh_secs.attr,
	&tune_attr_quota_warn_period.attr,
	&tune_attr_quota_quantum.attr,
	&tune_attr_atime_quantum.attr,
	&tune_attr_max_readahead.attr,
	&tune_attr_complain_secs.attr,
	&tune_attr_reclaim_limit.attr,
	&tune_attr_prefetch_secs.attr,
	&tune_attr_statfs_slow.attr,
	&tune_attr_quota_simul_sync.attr,
	&tune_attr_quota_cache_secs.attr,
	&tune_attr_max_atomic_write.attr,
	&tune_attr_stall_secs.attr,
	&tune_attr_entries_per_readdir.attr,
	&tune_attr_greedy_default.attr,
	&tune_attr_greedy_quantum.attr,
	&tune_attr_greedy_max.attr,
	&tune_attr_statfs_quantum.attr,
	&tune_attr_scand_secs.attr,
	&tune_attr_recoverd_secs.attr,
	&tune_attr_logd_secs.attr,
	&tune_attr_quotad_secs.attr,
	&tune_attr_inoded_secs.attr,
	&tune_attr_quota_scale.attr,
	&tune_attr_new_files_jdata.attr,
	&tune_attr_new_files_directio.attr,
	NULL
};

static struct attribute_group lockstruct_group = {
	.name = "lockstruct",
	.attrs = lockstruct_attrs
};

static struct attribute_group counters_group = {
	.name = "counters",
	.attrs = counters_attrs
};

static struct attribute_group args_group = {
	.name = "args",
	.attrs = args_attrs
};

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

int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
{
	int error;

	sdp->sd_kobj.kset = &gfs2_kset;
	sdp->sd_kobj.ktype = &gfs2_ktype;

	error = kobject_set_name(&sdp->sd_kobj, "%s", sdp->sd_table_name);
	if (error)
		goto fail;

	error = kobject_register(&sdp->sd_kobj);
	if (error)
		goto fail;

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

	error = sysfs_create_group(&sdp->sd_kobj, &counters_group);
	if (error)
		goto fail_lockstruct;

	error = sysfs_create_group(&sdp->sd_kobj, &args_group);
	if (error)
		goto fail_counters;

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

	return 0;

 fail_args:
	sysfs_remove_group(&sdp->sd_kobj, &args_group);
 fail_counters:
	sysfs_remove_group(&sdp->sd_kobj, &counters_group);
 fail_lockstruct:
	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
 fail_reg:
	kobject_unregister(&sdp->sd_kobj);
 fail:
	return error;
}

void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
{
	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
	sysfs_remove_group(&sdp->sd_kobj, &args_group);
	sysfs_remove_group(&sdp->sd_kobj, &counters_group);
	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
	kobject_unregister(&sdp->sd_kobj);
}

int gfs2_sys_init(void)
{
	gfs2_sys_margs = NULL;
	spin_lock_init(&gfs2_sys_margs_lock);
	return kset_register(&gfs2_kset);
}

void gfs2_sys_uninit(void)
{
	kfree(gfs2_sys_margs);
	kset_unregister(&gfs2_kset);
}
Commit	Line	Data
b3b94faa DT	1	/*
	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
	3	* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
	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
	7	* of the GNU General Public License v.2.
	8	*/
	9
	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/semaphore.h>
	18	#include <asm/uaccess.h>
	19
	20	#include "gfs2.h"
	21	#include "lm.h"
	22	#include "sys.h"
	23	#include "super.h"
	24	#include "glock.h"
	25	#include "quota.h"
	26
	27	char *gfs2_sys_margs;
	28	spinlock_t gfs2_sys_margs_lock;
	29
	30	static ssize_t id_show(struct gfs2_sbd sdp, char buf)
	31	{
	32	return sprintf(buf, "%s\n", sdp->sd_vfs->s_id);
	33	}
	34
	35	static ssize_t fsname_show(struct gfs2_sbd sdp, char buf)
	36	{
	37	return sprintf(buf, "%s\n", sdp->sd_fsname);
	38	}
	39
	40	static ssize_t freeze_show(struct gfs2_sbd sdp, char buf)
	41	{
	42	unsigned int count;
	43
	44	down(&sdp->sd_freeze_lock);
	45	count = sdp->sd_freeze_count;
	46	up(&sdp->sd_freeze_lock);
	47
	48	return sprintf(buf, "%u\n", count);
	49	}
	50
	51	static ssize_t freeze_store(struct gfs2_sbd sdp, const char buf, size_t len)
	52	{
	53	ssize_t ret = len;
	54	int error = 0;
	55	int n = simple_strtol(buf, NULL, 0);
	56
	57	if (!capable(CAP_SYS_ADMIN))
	58	return -EACCES;
	59
	60	switch (n) {
	61	case 0:
	62	gfs2_unfreeze_fs(sdp);
	63	break;
	64	case 1:
65	error = gfs2_freeze_fs(sdp);
66	break;
67	default:
68	ret = -EINVAL;
69	}
70
71	if (error)
72	fs_warn(sdp, "freeze %d error %d", n, error);
73
74	return ret;
75	}
76
77	static ssize_t withdraw_show(struct gfs2_sbd sdp, char buf)
78	{
79	unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
80	return sprintf(buf, "%u\n", b);
81	}
82
83	static ssize_t withdraw_store(struct gfs2_sbd sdp, const char buf, size_t len)
84	{
85	if (!capable(CAP_SYS_ADMIN))
86	return -EACCES;
87
88	if (simple_strtol(buf, NULL, 0) != 1)
89	return -EINVAL;
90
91	gfs2_lm_withdraw(sdp,
92	"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
93	sdp->sd_fsname);
94	return len;
95	}
96
97	static ssize_t statfs_sync_store(struct gfs2_sbd sdp, const char buf,
98	size_t len)
99	{
100	if (!capable(CAP_SYS_ADMIN))
101	return -EACCES;
102
103	if (simple_strtol(buf, NULL, 0) != 1)
104	return -EINVAL;
105
106	gfs2_statfs_sync(sdp);
107	return len;
108	}
109
110	static ssize_t shrink_store(struct gfs2_sbd sdp, const char buf, size_t len)
111	{
112	if (!capable(CAP_SYS_ADMIN))
113	return -EACCES;
114
115	if (simple_strtol(buf, NULL, 0) != 1)
116	return -EINVAL;
117
118	gfs2_gl_hash_clear(sdp, NO_WAIT);
119	return len;
120	}
121
122	static ssize_t quota_sync_store(struct gfs2_sbd sdp, const char buf,
123	size_t len)
124	{
125	if (!capable(CAP_SYS_ADMIN))
126	return -EACCES;
127
128	if (simple_strtol(buf, NULL, 0) != 1)
129	return -EINVAL;
130
131	gfs2_quota_sync(sdp);
132	return len;
133	}
134
135	static ssize_t quota_refresh_user_store(struct gfs2_sbd sdp, const char buf,
136	size_t len)
137	{
138	uint32_t id;
139
140	if (!capable(CAP_SYS_ADMIN))
141	return -EACCES;
142
143	id = simple_strtoul(buf, NULL, 0);
144
145	gfs2_quota_refresh(sdp, 1, id);
146	return len;
147	}
148
149	static ssize_t quota_refresh_group_store(struct gfs2_sbd sdp, const char buf,
150	size_t len)
151	{
152	uint32_t id;
153
154	if (!capable(CAP_SYS_ADMIN))
155	return -EACCES;
156
157	id = simple_strtoul(buf, NULL, 0);
158
159	gfs2_quota_refresh(sdp, 0, id);
160	return len;
161	}
162
163	struct gfs2_attr {
164	struct attribute attr;
165	ssize_t (show)(struct gfs2_sbd , char *);
166	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
167	};
168
169	#define GFS2_ATTR(name, mode, show, store) \
170	static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
171
172	GFS2_ATTR(id, 0444, id_show, NULL);
173	GFS2_ATTR(fsname, 0444, fsname_show, NULL);
174	GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
175	GFS2_ATTR(shrink, 0200, NULL, shrink_store);
176	GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
177	GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
178	GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
179	GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
180	GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
181
182	static struct attribute *gfs2_attrs[] = {
183	&gfs2_attr_id.attr,
184	&gfs2_attr_fsname.attr,
185	&gfs2_attr_freeze.attr,
186	&gfs2_attr_shrink.attr,
187	&gfs2_attr_withdraw.attr,
188	&gfs2_attr_statfs_sync.attr,
189	&gfs2_attr_quota_sync.attr,
190	&gfs2_attr_quota_refresh_user.attr,
191	&gfs2_attr_quota_refresh_group.attr,
192	NULL,
193	};
194
195	static ssize_t gfs2_attr_show(struct kobject kobj, struct attribute attr,
196	char *buf)
197	{
198	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
199	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
200	return a->show ? a->show(sdp, buf) : 0;
201	}
202
203	static ssize_t gfs2_attr_store(struct kobject kobj, struct attribute attr,
204	const char *buf, size_t len)
205	{
206	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
207	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
208	return a->store ? a->store(sdp, buf, len) : len;
209	}
210
211	static struct sysfs_ops gfs2_attr_ops = {
212	.show = gfs2_attr_show,
213	.store = gfs2_attr_store,
214	};
215
216	static struct kobj_type gfs2_ktype = {
217	.default_attrs = gfs2_attrs,
218	.sysfs_ops = &gfs2_attr_ops,
219	};
220
221	static struct kset gfs2_kset = {
222	.subsys = &fs_subsys,
223	.kobj = {.name = "gfs2",},
224	.ktype = &gfs2_ktype,
225	};
226
227	/*
228	* display struct lm_lockstruct fields
229	*/
230
231	struct lockstruct_attr {
232	struct attribute attr;
233	ssize_t (show)(struct gfs2_sbd , char *);
234	};
235
236	#define LOCKSTRUCT_ATTR(name, fmt) \
237	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
238	{ \
239	return sprintf(buf, fmt, sdp->sd_lockstruct.ls_##name); \
240	} \
241	static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
242
243	LOCKSTRUCT_ATTR(jid, "%u\n");
244	LOCKSTRUCT_ATTR(first, "%u\n");
245	LOCKSTRUCT_ATTR(lvb_size, "%u\n");
246	LOCKSTRUCT_ATTR(flags, "%d\n");
247
248	static struct attribute *lockstruct_attrs[] = {
249	&lockstruct_attr_jid.attr,
250	&lockstruct_attr_first.attr,
251	&lockstruct_attr_lvb_size.attr,
252	&lockstruct_attr_flags.attr,
253	NULL
254	};
255
256	/*
257	* display struct gfs2_args fields
258	*/
259
260	struct args_attr {
261	struct attribute attr;
262	ssize_t (show)(struct gfs2_sbd , char *);
263	};
264
265	#define ARGS_ATTR(name, fmt) \
266	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
267	{ \
268	return sprintf(buf, fmt, sdp->sd_args.ar_##name); \
269	} \
270	static struct args_attr args_attr_##name = __ATTR_RO(name)
271
272	ARGS_ATTR(lockproto, "%s\n");
273	ARGS_ATTR(locktable, "%s\n");
274	ARGS_ATTR(hostdata, "%s\n");
275	ARGS_ATTR(spectator, "%d\n");
276	ARGS_ATTR(ignore_local_fs, "%d\n");
277	ARGS_ATTR(localcaching, "%d\n");
278	ARGS_ATTR(localflocks, "%d\n");
279	ARGS_ATTR(debug, "%d\n");
280	ARGS_ATTR(upgrade, "%d\n");
281	ARGS_ATTR(num_glockd, "%u\n");
282	ARGS_ATTR(posix_acl, "%d\n");
283	ARGS_ATTR(quota, "%u\n");
284	ARGS_ATTR(suiddir, "%d\n");
285	ARGS_ATTR(data, "%d\n");
286
287	/* one oddball doesn't fit the macro mold */
288	static ssize_t noatime_show(struct gfs2_sbd sdp, char buf)
289	{
290	return sprintf(buf, "%d\n", !!test_bit(SDF_NOATIME, &sdp->sd_flags));
291	}
292	static struct args_attr args_attr_noatime = __ATTR_RO(noatime);
293
294	static struct attribute *args_attrs[] = {
295	&args_attr_lockproto.attr,
296	&args_attr_locktable.attr,
297	&args_attr_hostdata.attr,
298	&args_attr_spectator.attr,
299	&args_attr_ignore_local_fs.attr,
300	&args_attr_localcaching.attr,
301	&args_attr_localflocks.attr,
302	&args_attr_debug.attr,
303	&args_attr_upgrade.attr,
304	&args_attr_num_glockd.attr,
305	&args_attr_posix_acl.attr,
306	&args_attr_quota.attr,
307	&args_attr_suiddir.attr,
308	&args_attr_data.attr,
309	&args_attr_noatime.attr,
310	NULL
311	};
312
313	/*
314	* display counters from superblock
315	*/
316
317	struct counters_attr {
318	struct attribute attr;
319	ssize_t (show)(struct gfs2_sbd , char *);
320	};
321
322	#define COUNTERS_ATTR_GENERAL(name, fmt, val) \
323	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
324	{ \
325	return sprintf(buf, fmt, val); \
326	} \
327	static struct counters_attr counters_attr_##name = __ATTR_RO(name)
328
329	#define COUNTERS_ATTR_SIMPLE(name, fmt) \
330	COUNTERS_ATTR_GENERAL(name, fmt, sdp->sd_##name)
331
332	#define COUNTERS_ATTR_ATOMIC(name, fmt) \
333	COUNTERS_ATTR_GENERAL(name, fmt, (unsigned int)atomic_read(&sdp->sd_##name))
334
335	COUNTERS_ATTR_ATOMIC(glock_count, "%u\n");
336	COUNTERS_ATTR_ATOMIC(glock_held_count, "%u\n");
337	COUNTERS_ATTR_ATOMIC(inode_count, "%u\n");
338	COUNTERS_ATTR_ATOMIC(bufdata_count, "%u\n");
339	COUNTERS_ATTR_ATOMIC(unlinked_count, "%u\n");
340	COUNTERS_ATTR_ATOMIC(quota_count, "%u\n");
341	COUNTERS_ATTR_SIMPLE(log_num_gl, "%u\n");
342	COUNTERS_ATTR_SIMPLE(log_num_buf, "%u\n");
343	COUNTERS_ATTR_SIMPLE(log_num_revoke, "%u\n");
344	COUNTERS_ATTR_SIMPLE(log_num_rg, "%u\n");
345	COUNTERS_ATTR_SIMPLE(log_num_databuf, "%u\n");
346	COUNTERS_ATTR_SIMPLE(log_blks_free, "%u\n");
347	COUNTERS_ATTR_GENERAL(jd_blocks, "%u\n", sdp->sd_jdesc->jd_blocks);
348	COUNTERS_ATTR_ATOMIC(reclaim_count, "%u\n");
349	COUNTERS_ATTR_SIMPLE(log_wraps, "%llu\n");
350	COUNTERS_ATTR_ATOMIC(fh2dentry_misses, "%u\n");
351	COUNTERS_ATTR_ATOMIC(reclaimed, "%u\n");
352	COUNTERS_ATTR_ATOMIC(log_flush_incore, "%u\n");
353	COUNTERS_ATTR_ATOMIC(log_flush_ondisk, "%u\n");
354	COUNTERS_ATTR_ATOMIC(glock_nq_calls, "%u\n");
355	COUNTERS_ATTR_ATOMIC(glock_dq_calls, "%u\n");
356	COUNTERS_ATTR_ATOMIC(glock_prefetch_calls, "%u\n");
357	COUNTERS_ATTR_ATOMIC(lm_lock_calls, "%u\n");
358	COUNTERS_ATTR_ATOMIC(lm_unlock_calls, "%u\n");
359	COUNTERS_ATTR_ATOMIC(lm_callbacks, "%u\n");
360	COUNTERS_ATTR_ATOMIC(ops_address, "%u\n");
361	COUNTERS_ATTR_ATOMIC(ops_dentry, "%u\n");
362	COUNTERS_ATTR_ATOMIC(ops_export, "%u\n");
363	COUNTERS_ATTR_ATOMIC(ops_file, "%u\n");
364	COUNTERS_ATTR_ATOMIC(ops_inode, "%u\n");
365	COUNTERS_ATTR_ATOMIC(ops_super, "%u\n");
366	COUNTERS_ATTR_ATOMIC(ops_vm, "%u\n");
367
368	static struct attribute *counters_attrs[] = {
369	&counters_attr_glock_count.attr,
370	&counters_attr_glock_held_count.attr,
371	&counters_attr_inode_count.attr,
372	&counters_attr_bufdata_count.attr,
373	&counters_attr_unlinked_count.attr,
374	&counters_attr_quota_count.attr,
375	&counters_attr_log_num_gl.attr,
376	&counters_attr_log_num_buf.attr,
377	&counters_attr_log_num_revoke.attr,
378	&counters_attr_log_num_rg.attr,
379	&counters_attr_log_num_databuf.attr,
380	&counters_attr_log_blks_free.attr,
381	&counters_attr_jd_blocks.attr,
382	&counters_attr_reclaim_count.attr,
383	&counters_attr_log_wraps.attr,
384	&counters_attr_fh2dentry_misses.attr,
385	&counters_attr_reclaimed.attr,
386	&counters_attr_log_flush_incore.attr,
387	&counters_attr_log_flush_ondisk.attr,
388	&counters_attr_glock_nq_calls.attr,
389	&counters_attr_glock_dq_calls.attr,
390	&counters_attr_glock_prefetch_calls.attr,
391	&counters_attr_lm_lock_calls.attr,
392	&counters_attr_lm_unlock_calls.attr,
393	&counters_attr_lm_callbacks.attr,
394	&counters_attr_ops_address.attr,
395	&counters_attr_ops_dentry.attr,
396	&counters_attr_ops_export.attr,
397	&counters_attr_ops_file.attr,
398	&counters_attr_ops_inode.attr,
399	&counters_attr_ops_super.attr,
400	&counters_attr_ops_vm.attr,
401	NULL
402	};
403
404	/*
405	* get and set struct gfs2_tune fields
406	*/
407
408	static ssize_t quota_scale_show(struct gfs2_sbd sdp, char buf)
409	{
410	return sprintf(buf, "%u %u\n", sdp->sd_tune.gt_quota_scale_num,
411	sdp->sd_tune.gt_quota_scale_den);
412	}
413
414	static ssize_t quota_scale_store(struct gfs2_sbd sdp, const char buf,
415	size_t len)
416	{
417	struct gfs2_tune *gt = &sdp->sd_tune;
418	unsigned int x, y;
419
420	if (!capable(CAP_SYS_ADMIN))
421	return -EACCES;
422
423	if (sscanf(buf, "%u %u", &x, &y) != 2 \|\| !y)
424	return -EINVAL;
425
426	spin_lock(&gt->gt_spin);
427	gt->gt_quota_scale_num = x;
428	gt->gt_quota_scale_den = y;
429	spin_unlock(&gt->gt_spin);
430	return len;
431	}
432
433	static ssize_t tune_set(struct gfs2_sbd sdp, unsigned int field,
434	int check_zero, const char *buf, size_t len)
435	{
436	struct gfs2_tune *gt = &sdp->sd_tune;
437	unsigned int x;
438
439	if (!capable(CAP_SYS_ADMIN))
440	return -EACCES;
441
442	x = simple_strtoul(buf, NULL, 0);
443
444	if (check_zero && !x)
445	return -EINVAL;
446
447	spin_lock(&gt->gt_spin);
448	*field = x;
449	spin_unlock(&gt->gt_spin);
450	return len;
451	}
452
453	struct tune_attr {
454	struct attribute attr;
455	ssize_t (show)(struct gfs2_sbd , char *);
456	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
457	};
458
459	#define TUNE_ATTR_3(name, show, store) \
460	static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
461
462	#define TUNE_ATTR_2(name, store) \
463	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
464	{ \
465	return sprintf(buf, "%u\n", sdp->sd_tune.gt_##name); \
466	} \
467	TUNE_ATTR_3(name, name##_show, store)
468
469	#define TUNE_ATTR(name, check_zero) \
470	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
471	{ \
472	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
473	} \
474	TUNE_ATTR_2(name, name##_store)
475
476	#define TUNE_ATTR_DAEMON(name, process) \
477	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
478	{ \
479	ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
480	wake_up_process(sdp->sd_##process); \
481	return r; \
482	} \
483	TUNE_ATTR_2(name, name##_store)
484
485	TUNE_ATTR(ilimit, 0);
486	TUNE_ATTR(ilimit_tries, 0);
487	TUNE_ATTR(ilimit_min, 0);
488	TUNE_ATTR(demote_secs, 0);
489	TUNE_ATTR(incore_log_blocks, 0);
490	TUNE_ATTR(log_flush_secs, 0);
491	TUNE_ATTR(jindex_refresh_secs, 0);
492	TUNE_ATTR(quota_warn_period, 0);
493	TUNE_ATTR(quota_quantum, 0);
494	TUNE_ATTR(atime_quantum, 0);
495	TUNE_ATTR(max_readahead, 0);
496	TUNE_ATTR(complain_secs, 0);
497	TUNE_ATTR(reclaim_limit, 0);
498	TUNE_ATTR(prefetch_secs, 0);
499	TUNE_ATTR(statfs_slow, 0);
500	TUNE_ATTR(new_files_jdata, 0);
501	TUNE_ATTR(new_files_directio, 0);
502	TUNE_ATTR(quota_simul_sync, 1);
503	TUNE_ATTR(quota_cache_secs, 1);
504	TUNE_ATTR(max_atomic_write, 1);
505	TUNE_ATTR(stall_secs, 1);
506	TUNE_ATTR(entries_per_readdir, 1);
507	TUNE_ATTR(greedy_default, 1);
508	TUNE_ATTR(greedy_quantum, 1);
509	TUNE_ATTR(greedy_max, 1);
510	TUNE_ATTR(statfs_quantum, 1);
511	TUNE_ATTR_DAEMON(scand_secs, scand_process);
512	TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
513	TUNE_ATTR_DAEMON(logd_secs, logd_process);
514	TUNE_ATTR_DAEMON(quotad_secs, quotad_process);
515	TUNE_ATTR_DAEMON(inoded_secs, inoded_process);
516	TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
517
518	static struct attribute *tune_attrs[] = {
519	&tune_attr_ilimit.attr,
520	&tune_attr_ilimit_tries.attr,
521	&tune_attr_ilimit_min.attr,
522	&tune_attr_demote_secs.attr,
523	&tune_attr_incore_log_blocks.attr,
524	&tune_attr_log_flush_secs.attr,
525	&tune_attr_jindex_refresh_secs.attr,
526	&tune_attr_quota_warn_period.attr,
527	&tune_attr_quota_quantum.attr,
528	&tune_attr_atime_quantum.attr,
529	&tune_attr_max_readahead.attr,
530	&tune_attr_complain_secs.attr,
531	&tune_attr_reclaim_limit.attr,
532	&tune_attr_prefetch_secs.attr,
533	&tune_attr_statfs_slow.attr,
534	&tune_attr_quota_simul_sync.attr,
535	&tune_attr_quota_cache_secs.attr,
536	&tune_attr_max_atomic_write.attr,
537	&tune_attr_stall_secs.attr,
538	&tune_attr_entries_per_readdir.attr,
539	&tune_attr_greedy_default.attr,
540	&tune_attr_greedy_quantum.attr,
541	&tune_attr_greedy_max.attr,
542	&tune_attr_statfs_quantum.attr,
543	&tune_attr_scand_secs.attr,
544	&tune_attr_recoverd_secs.attr,
545	&tune_attr_logd_secs.attr,
546	&tune_attr_quotad_secs.attr,
547	&tune_attr_inoded_secs.attr,
548	&tune_attr_quota_scale.attr,
549	&tune_attr_new_files_jdata.attr,
550	&tune_attr_new_files_directio.attr,
551	NULL
552	};
553
554	static struct attribute_group lockstruct_group = {
555	.name = "lockstruct",
556	.attrs = lockstruct_attrs
557	};
558
559	static struct attribute_group counters_group = {
560	.name = "counters",
561	.attrs = counters_attrs
562	};
563
564	static struct attribute_group args_group = {
565	.name = "args",
566	.attrs = args_attrs
567	};
568
569	static struct attribute_group tune_group = {
570	.name = "tune",
571	.attrs = tune_attrs
572	};
573
574	int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
575	{
576	int error;
577
578	sdp->sd_kobj.kset = &gfs2_kset;
579	sdp->sd_kobj.ktype = &gfs2_ktype;
580
581	error = kobject_set_name(&sdp->sd_kobj, "%s", sdp->sd_table_name);
582	if (error)
583	goto fail;
584
585	error = kobject_register(&sdp->sd_kobj);
586	if (error)
587	goto fail;
588
589	error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
590	if (error)
591	goto fail_reg;
592
593	error = sysfs_create_group(&sdp->sd_kobj, &counters_group);
594	if (error)
595	goto fail_lockstruct;
596
597	error = sysfs_create_group(&sdp->sd_kobj, &args_group);
598	if (error)
599	goto fail_counters;
600
601	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
602	if (error)
603	goto fail_args;
604
605	return 0;
606
607	fail_args:
608	sysfs_remove_group(&sdp->sd_kobj, &args_group);
609	fail_counters:
610	sysfs_remove_group(&sdp->sd_kobj, &counters_group);
611	fail_lockstruct:
612	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
613	fail_reg:
614	kobject_unregister(&sdp->sd_kobj);
615	fail:
616	return error;
617	}
618
619	void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
620	{
621	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
622	sysfs_remove_group(&sdp->sd_kobj, &args_group);
623	sysfs_remove_group(&sdp->sd_kobj, &counters_group);
624	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
625	kobject_unregister(&sdp->sd_kobj);
626	}
627
628	int gfs2_sys_init(void)
629	{
630	gfs2_sys_margs = NULL;
631	spin_lock_init(&gfs2_sys_margs_lock);
632	return kset_register(&gfs2_kset);
633	}
634
635	void gfs2_sys_uninit(void)
636	{
637	kfree(gfs2_sys_margs);
638	kset_unregister(&gfs2_kset);
639	}
640