[linux-2.6-block.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/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/module.h>
#include <linux/kobject.h>
#include <linux/gfs2_ondisk.h>
#include <linux/lm_interface.h>
#include <asm/uaccess.h>

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

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 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);
	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)
{
	u32 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)
{
	u32 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(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_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;

/*
 * 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 snprintf(buf, PAGE_SIZE, 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 snprintf(buf, PAGE_SIZE, 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(posix_acl,       "%d\n");
ARGS_ATTR(quota,           "%u\n");
ARGS_ATTR(suiddir,         "%d\n");
ARGS_ATTR(data,            "%d\n");

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_posix_acl.attr,
	&args_attr_quota.attr,
	&args_attr_suiddir.attr,
	&args_attr_data.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;
}

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 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)

#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(incore_log_blocks, 0);
TUNE_ATTR(log_flush_secs, 0);
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(quota_cache_secs, 1);
TUNE_ATTR(stall_secs, 1);
TUNE_ATTR(statfs_quantum, 1);
TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
TUNE_ATTR_DAEMON(logd_secs, logd_process);
TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);

static struct attribute *tune_attrs[] = {
	&tune_attr_incore_log_blocks.attr,
	&tune_attr_log_flush_secs.attr,
	&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_quota_cache_secs.attr,
	&tune_attr_stall_secs.attr,
	&tune_attr_statfs_quantum.attr,
	&tune_attr_recoverd_secs.attr,
	&tune_attr_logd_secs.attr,
	&tune_attr_quota_scale.attr,
	&tune_attr_new_files_jdata.attr,
	NULL,
};

static struct attribute_group lockstruct_group = {
	.name = "lockstruct",
	.attrs = lockstruct_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;
	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, &lockstruct_group);
	if (error)
		goto fail_reg;

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

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

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

fail_args:
	sysfs_remove_group(&sdp->sd_kobj, &args_group);
fail_lockstruct:
	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_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_group(&sdp->sd_kobj, &tune_group);
	sysfs_remove_group(&sdp->sd_kobj, &args_group);
	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_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);
	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
	return 0;
}

static 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>
	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>
5c676f6d	17	#include <linux/gfs2_ondisk.h>
7d308590	18	#include <linux/lm_interface.h>
b3b94faa DT	19	#include <asm/uaccess.h>
	20
	21	#include "gfs2.h"
5c676f6d	22	#include "incore.h"
b3b94faa DT	23	#include "sys.h"
	24	#include "super.h"
	25	#include "glock.h"
	26	#include "quota.h"
5c676f6d	27	#include "util.h"
b3b94faa	28
b3b94faa DT	29	static ssize_t id_show(struct gfs2_sbd sdp, char buf)
b3b94faa DT	30	{
c7227e46 BP	31	return snprintf(buf, PAGE_SIZE, "%u:%u\n",
c7227e46 BP	32	MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
b3b94faa DT	33	}
	34
	35	static ssize_t fsname_show(struct gfs2_sbd sdp, char buf)
	36	{
3204a6c0	37	return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
b3b94faa DT	38	}
	39
	40	static ssize_t freeze_show(struct gfs2_sbd sdp, char buf)
	41	{
	42	unsigned int count;
	43
f55ab26a	44	mutex_lock(&sdp->sd_freeze_lock);
b3b94faa	45	count = sdp->sd_freeze_count;
f55ab26a	46	mutex_unlock(&sdp->sd_freeze_lock);
b3b94faa	47
3204a6c0	48	return snprintf(buf, PAGE_SIZE, "%u\n", count);
b3b94faa DT	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);
3204a6c0	80	return snprintf(buf, PAGE_SIZE, "%u\n", b);
b3b94faa DT	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
b3b94faa DT	110	static ssize_t quota_sync_store(struct gfs2_sbd sdp, const char buf,
	111	size_t len)
	112	{
	113	if (!capable(CAP_SYS_ADMIN))
	114	return -EACCES;
	115
	116	if (simple_strtol(buf, NULL, 0) != 1)
	117	return -EINVAL;
	118
	119	gfs2_quota_sync(sdp);
	120	return len;
	121	}
	122
	123	static ssize_t quota_refresh_user_store(struct gfs2_sbd sdp, const char buf,
	124	size_t len)
	125	{
cd915493	126	u32 id;
b3b94faa DT	127
	128	if (!capable(CAP_SYS_ADMIN))
	129	return -EACCES;
	130
	131	id = simple_strtoul(buf, NULL, 0);
	132
	133	gfs2_quota_refresh(sdp, 1, id);
	134	return len;
	135	}
	136
	137	static ssize_t quota_refresh_group_store(struct gfs2_sbd sdp, const char buf,
	138	size_t len)
	139	{
cd915493	140	u32 id;
b3b94faa DT	141
	142	if (!capable(CAP_SYS_ADMIN))
	143	return -EACCES;
	144
	145	id = simple_strtoul(buf, NULL, 0);
	146
	147	gfs2_quota_refresh(sdp, 0, id);
	148	return len;
	149	}
	150
	151	struct gfs2_attr {
	152	struct attribute attr;
	153	ssize_t (show)(struct gfs2_sbd , char *);
	154	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
	155	};
	156
	157	#define GFS2_ATTR(name, mode, show, store) \
	158	static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
	159
	160	GFS2_ATTR(id, 0444, id_show, NULL);
	161	GFS2_ATTR(fsname, 0444, fsname_show, NULL);
	162	GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
b3b94faa DT	163	GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
	164	GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
	165	GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
	166	GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
	167	GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
	168
	169	static struct attribute *gfs2_attrs[] = {
	170	&gfs2_attr_id.attr,
	171	&gfs2_attr_fsname.attr,
	172	&gfs2_attr_freeze.attr,
b3b94faa DT	173	&gfs2_attr_withdraw.attr,
	174	&gfs2_attr_statfs_sync.attr,
	175	&gfs2_attr_quota_sync.attr,
	176	&gfs2_attr_quota_refresh_user.attr,
	177	&gfs2_attr_quota_refresh_group.attr,
	178	NULL,
	179	};
	180
	181	static ssize_t gfs2_attr_show(struct kobject kobj, struct attribute attr,
	182	char *buf)
	183	{
	184	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	185	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	186	return a->show ? a->show(sdp, buf) : 0;
	187	}
	188
	189	static ssize_t gfs2_attr_store(struct kobject kobj, struct attribute attr,
	190	const char *buf, size_t len)
	191	{
	192	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	193	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	194	return a->store ? a->store(sdp, buf, len) : len;
	195	}
	196
	197	static struct sysfs_ops gfs2_attr_ops = {
	198	.show = gfs2_attr_show,
	199	.store = gfs2_attr_store,
	200	};
	201
	202	static struct kobj_type gfs2_ktype = {
	203	.default_attrs = gfs2_attrs,
	204	.sysfs_ops = &gfs2_attr_ops,
	205	};
	206
9bec101a	207	static struct kset *gfs2_kset;
b3b94faa DT	208
	209	/*
	210	* display struct lm_lockstruct fields
	211	*/
	212
	213	struct lockstruct_attr {
	214	struct attribute attr;
	215	ssize_t (show)(struct gfs2_sbd , char *);
	216	};
	217
	218	#define LOCKSTRUCT_ATTR(name, fmt) \
	219	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	220	{ \
3204a6c0	221	return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
b3b94faa DT	222	} \
	223	static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
	224
	225	LOCKSTRUCT_ATTR(jid, "%u\n");
	226	LOCKSTRUCT_ATTR(first, "%u\n");
	227	LOCKSTRUCT_ATTR(lvb_size, "%u\n");
	228	LOCKSTRUCT_ATTR(flags, "%d\n");
	229
	230	static struct attribute *lockstruct_attrs[] = {
	231	&lockstruct_attr_jid.attr,
	232	&lockstruct_attr_first.attr,
	233	&lockstruct_attr_lvb_size.attr,
	234	&lockstruct_attr_flags.attr,
ea67eedb	235	NULL,
b3b94faa DT	236	};
	237
	238	/*
	239	* display struct gfs2_args fields
	240	*/
	241
	242	struct args_attr {
	243	struct attribute attr;
	244	ssize_t (show)(struct gfs2_sbd , char *);
	245	};
	246
	247	#define ARGS_ATTR(name, fmt) \
	248	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	249	{ \
3204a6c0	250	return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name); \
b3b94faa DT	251	} \
	252	static struct args_attr args_attr_##name = __ATTR_RO(name)
	253
	254	ARGS_ATTR(lockproto, "%s\n");
	255	ARGS_ATTR(locktable, "%s\n");
	256	ARGS_ATTR(hostdata, "%s\n");
	257	ARGS_ATTR(spectator, "%d\n");
	258	ARGS_ATTR(ignore_local_fs, "%d\n");
	259	ARGS_ATTR(localcaching, "%d\n");
	260	ARGS_ATTR(localflocks, "%d\n");
	261	ARGS_ATTR(debug, "%d\n");
	262	ARGS_ATTR(upgrade, "%d\n");
b3b94faa DT	263	ARGS_ATTR(posix_acl, "%d\n");
	264	ARGS_ATTR(quota, "%u\n");
	265	ARGS_ATTR(suiddir, "%d\n");
	266	ARGS_ATTR(data, "%d\n");
	267
b3b94faa DT	268	static struct attribute *args_attrs[] = {
	269	&args_attr_lockproto.attr,
	270	&args_attr_locktable.attr,
	271	&args_attr_hostdata.attr,
	272	&args_attr_spectator.attr,
	273	&args_attr_ignore_local_fs.attr,
	274	&args_attr_localcaching.attr,
	275	&args_attr_localflocks.attr,
	276	&args_attr_debug.attr,
	277	&args_attr_upgrade.attr,
b3b94faa DT	278	&args_attr_posix_acl.attr,
	279	&args_attr_quota.attr,
	280	&args_attr_suiddir.attr,
	281	&args_attr_data.attr,
ea67eedb	282	NULL,
b3b94faa DT	283	};
b3b94faa DT	284
b3b94faa DT	285	/*
	286	* get and set struct gfs2_tune fields
	287	*/
	288
	289	static ssize_t quota_scale_show(struct gfs2_sbd sdp, char buf)
	290	{
3204a6c0 DT	291	return snprintf(buf, PAGE_SIZE, "%u %u\n",
	292	sdp->sd_tune.gt_quota_scale_num,
	293	sdp->sd_tune.gt_quota_scale_den);
b3b94faa DT	294	}
	295
	296	static ssize_t quota_scale_store(struct gfs2_sbd sdp, const char buf,
	297	size_t len)
	298	{
	299	struct gfs2_tune *gt = &sdp->sd_tune;
	300	unsigned int x, y;
	301
	302	if (!capable(CAP_SYS_ADMIN))
	303	return -EACCES;
	304
	305	if (sscanf(buf, "%u %u", &x, &y) != 2 \|\| !y)
	306	return -EINVAL;
	307
	308	spin_lock(&gt->gt_spin);
	309	gt->gt_quota_scale_num = x;
	310	gt->gt_quota_scale_den = y;
	311	spin_unlock(&gt->gt_spin);
	312	return len;
	313	}
	314
	315	static ssize_t tune_set(struct gfs2_sbd sdp, unsigned int field,
	316	int check_zero, const char *buf, size_t len)
	317	{
	318	struct gfs2_tune *gt = &sdp->sd_tune;
	319	unsigned int x;
	320
	321	if (!capable(CAP_SYS_ADMIN))
	322	return -EACCES;
	323
	324	x = simple_strtoul(buf, NULL, 0);
	325
	326	if (check_zero && !x)
	327	return -EINVAL;
	328
	329	spin_lock(&gt->gt_spin);
	330	*field = x;
	331	spin_unlock(&gt->gt_spin);
	332	return len;
	333	}
	334
	335	struct tune_attr {
	336	struct attribute attr;
	337	ssize_t (show)(struct gfs2_sbd , char *);
	338	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
	339	};
	340
	341	#define TUNE_ATTR_3(name, show, store) \
	342	static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
	343
	344	#define TUNE_ATTR_2(name, store) \
	345	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	346	{ \
3204a6c0	347	return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
b3b94faa DT	348	} \
	349	TUNE_ATTR_3(name, name##_show, store)
	350
	351	#define TUNE_ATTR(name, check_zero) \
	352	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	353	{ \
	354	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
	355	} \
	356	TUNE_ATTR_2(name, name##_store)
	357
	358	#define TUNE_ATTR_DAEMON(name, process) \
	359	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	360	{ \
	361	ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
	362	wake_up_process(sdp->sd_##process); \
	363	return r; \
	364	} \
	365	TUNE_ATTR_2(name, name##_store)
	366
b3b94faa DT	367	TUNE_ATTR(incore_log_blocks, 0);
b3b94faa DT	368	TUNE_ATTR(log_flush_secs, 0);
b3b94faa DT	369	TUNE_ATTR(quota_warn_period, 0);
b3b94faa DT	370	TUNE_ATTR(quota_quantum, 0);
b3b94faa DT	371	TUNE_ATTR(max_readahead, 0);
b3b94faa DT	372	TUNE_ATTR(complain_secs, 0);
b3b94faa DT	373	TUNE_ATTR(statfs_slow, 0);
b3b94faa DT	374	TUNE_ATTR(new_files_jdata, 0);
b3b94faa DT	375	TUNE_ATTR(quota_simul_sync, 1);
b3b94faa DT	376	TUNE_ATTR(quota_cache_secs, 1);
b3b94faa	377	TUNE_ATTR(stall_secs, 1);
b3b94faa	378	TUNE_ATTR(statfs_quantum, 1);
b3b94faa DT	379	TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
b3b94faa DT	380	TUNE_ATTR_DAEMON(logd_secs, logd_process);
b3b94faa DT	381	TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
	382
	383	static struct attribute *tune_attrs[] = {
b3b94faa DT	384	&tune_attr_incore_log_blocks.attr,
b3b94faa DT	385	&tune_attr_log_flush_secs.attr,
b3b94faa DT	386	&tune_attr_quota_warn_period.attr,
b3b94faa DT	387	&tune_attr_quota_quantum.attr,
b3b94faa DT	388	&tune_attr_max_readahead.attr,
b3b94faa DT	389	&tune_attr_complain_secs.attr,
b3b94faa DT	390	&tune_attr_statfs_slow.attr,
	391	&tune_attr_quota_simul_sync.attr,
	392	&tune_attr_quota_cache_secs.attr,
b3b94faa	393	&tune_attr_stall_secs.attr,
b3b94faa	394	&tune_attr_statfs_quantum.attr,
b3b94faa DT	395	&tune_attr_recoverd_secs.attr,
b3b94faa DT	396	&tune_attr_logd_secs.attr,
b3b94faa DT	397	&tune_attr_quota_scale.attr,
b3b94faa DT	398	&tune_attr_new_files_jdata.attr,
ea67eedb	399	NULL,
b3b94faa DT	400	};
	401
	402	static struct attribute_group lockstruct_group = {
	403	.name = "lockstruct",
ea67eedb	404	.attrs = lockstruct_attrs,
b3b94faa DT	405	};
b3b94faa DT	406
b3b94faa DT	407	static struct attribute_group args_group = {
b3b94faa DT	408	.name = "args",
ea67eedb	409	.attrs = args_attrs,
b3b94faa DT	410	};
	411
	412	static struct attribute_group tune_group = {
	413	.name = "tune",
ea67eedb	414	.attrs = tune_attrs,
b3b94faa DT	415	};
	416
	417	int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
	418	{
	419	int error;
	420
9bec101a	421	sdp->sd_kobj.kset = gfs2_kset;
901195ed GKH	422	error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
901195ed GKH	423	"%s", sdp->sd_table_name);
b3b94faa DT	424	if (error)
	425	goto fail;
	426
	427	error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
	428	if (error)
	429	goto fail_reg;
	430
b3b94faa DT	431	error = sysfs_create_group(&sdp->sd_kobj, &args_group);
b3b94faa DT	432	if (error)
97cc1025	433	goto fail_lockstruct;
b3b94faa DT	434
	435	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
	436	if (error)
	437	goto fail_args;
	438
901195ed	439	kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
b3b94faa DT	440	return 0;
b3b94faa DT	441
a91ea69f	442	fail_args:
b3b94faa	443	sysfs_remove_group(&sdp->sd_kobj, &args_group);
a91ea69f	444	fail_lockstruct:
b3b94faa	445	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
a91ea69f	446	fail_reg:
197b12d6	447	kobject_put(&sdp->sd_kobj);
a91ea69f	448	fail:
65952fb4	449	fs_err(sdp, "error %d adding sysfs files", error);
b3b94faa DT	450	return error;
	451	}
	452
	453	void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
	454	{
	455	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
	456	sysfs_remove_group(&sdp->sd_kobj, &args_group);
b3b94faa	457	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
197b12d6	458	kobject_put(&sdp->sd_kobj);
b3b94faa DT	459	}
b3b94faa DT	460
fdd1062e SW	461	static int gfs2_uevent(struct kset kset, struct kobject kobj,
	462	struct kobj_uevent_env *env)
	463	{
	464	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	465	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
	466	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
	467	return 0;
	468	}
	469
	470	static struct kset_uevent_ops gfs2_uevent_ops = {
	471	.uevent = gfs2_uevent,
	472	};
	473
	474
b3b94faa DT	475	int gfs2_sys_init(void)
b3b94faa DT	476	{
fdd1062e	477	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
9bec101a GKH	478	if (!gfs2_kset)
	479	return -ENOMEM;
	480	return 0;
b3b94faa DT	481	}
	482
	483	void gfs2_sys_uninit(void)
	484	{
9bec101a	485	kset_unregister(gfs2_kset);
b3b94faa DT	486	}
b3b94faa DT	487