[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"

char *gfs2_sys_margs;
spinlock_t gfs2_sys_margs_lock;

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_sys_margs = NULL;
	spin_lock_init(&gfs2_sys_margs_lock);
	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
	if (!gfs2_kset)
		return -ENOMEM;
	return 0;
}

void gfs2_sys_uninit(void)
{
	kfree(gfs2_sys_margs);
	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 DT	28
	29	char *gfs2_sys_margs;
	30	spinlock_t gfs2_sys_margs_lock;
	31
	32	static ssize_t id_show(struct gfs2_sbd sdp, char buf)
	33	{
c7227e46 BP	34	return snprintf(buf, PAGE_SIZE, "%u:%u\n",
c7227e46 BP	35	MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
b3b94faa DT	36	}
	37
	38	static ssize_t fsname_show(struct gfs2_sbd sdp, char buf)
	39	{
3204a6c0	40	return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
b3b94faa DT	41	}
	42
	43	static ssize_t freeze_show(struct gfs2_sbd sdp, char buf)
	44	{
	45	unsigned int count;
	46
f55ab26a	47	mutex_lock(&sdp->sd_freeze_lock);
b3b94faa	48	count = sdp->sd_freeze_count;
f55ab26a	49	mutex_unlock(&sdp->sd_freeze_lock);
b3b94faa	50
3204a6c0	51	return snprintf(buf, PAGE_SIZE, "%u\n", count);
b3b94faa DT	52	}
	53
	54	static ssize_t freeze_store(struct gfs2_sbd sdp, const char buf, size_t len)
	55	{
	56	ssize_t ret = len;
	57	int error = 0;
	58	int n = simple_strtol(buf, NULL, 0);
	59
	60	if (!capable(CAP_SYS_ADMIN))
	61	return -EACCES;
	62
	63	switch (n) {
	64	case 0:
	65	gfs2_unfreeze_fs(sdp);
	66	break;
	67	case 1:
	68	error = gfs2_freeze_fs(sdp);
	69	break;
	70	default:
	71	ret = -EINVAL;
	72	}
	73
	74	if (error)
	75	fs_warn(sdp, "freeze %d error %d", n, error);
	76
	77	return ret;
	78	}
	79
	80	static ssize_t withdraw_show(struct gfs2_sbd sdp, char buf)
	81	{
	82	unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
3204a6c0	83	return snprintf(buf, PAGE_SIZE, "%u\n", b);
b3b94faa DT	84	}
	85
	86	static ssize_t withdraw_store(struct gfs2_sbd sdp, const char buf, size_t len)
	87	{
	88	if (!capable(CAP_SYS_ADMIN))
	89	return -EACCES;
	90
	91	if (simple_strtol(buf, NULL, 0) != 1)
	92	return -EINVAL;
	93
	94	gfs2_lm_withdraw(sdp,
	95	"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
	96	sdp->sd_fsname);
	97	return len;
	98	}
	99
	100	static ssize_t statfs_sync_store(struct gfs2_sbd sdp, const char buf,
	101	size_t len)
	102	{
	103	if (!capable(CAP_SYS_ADMIN))
	104	return -EACCES;
	105
	106	if (simple_strtol(buf, NULL, 0) != 1)
	107	return -EINVAL;
	108
	109	gfs2_statfs_sync(sdp);
	110	return len;
	111	}
	112
b3b94faa DT	113	static ssize_t quota_sync_store(struct gfs2_sbd sdp, const char buf,
	114	size_t len)
	115	{
	116	if (!capable(CAP_SYS_ADMIN))
	117	return -EACCES;
	118
	119	if (simple_strtol(buf, NULL, 0) != 1)
	120	return -EINVAL;
	121
	122	gfs2_quota_sync(sdp);
	123	return len;
	124	}
	125
	126	static ssize_t quota_refresh_user_store(struct gfs2_sbd sdp, const char buf,
	127	size_t len)
	128	{
cd915493	129	u32 id;
b3b94faa DT	130
	131	if (!capable(CAP_SYS_ADMIN))
	132	return -EACCES;
	133
	134	id = simple_strtoul(buf, NULL, 0);
	135
	136	gfs2_quota_refresh(sdp, 1, id);
	137	return len;
	138	}
	139
	140	static ssize_t quota_refresh_group_store(struct gfs2_sbd sdp, const char buf,
	141	size_t len)
	142	{
cd915493	143	u32 id;
b3b94faa DT	144
	145	if (!capable(CAP_SYS_ADMIN))
	146	return -EACCES;
	147
	148	id = simple_strtoul(buf, NULL, 0);
	149
	150	gfs2_quota_refresh(sdp, 0, id);
	151	return len;
	152	}
	153
	154	struct gfs2_attr {
	155	struct attribute attr;
	156	ssize_t (show)(struct gfs2_sbd , char *);
	157	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
	158	};
	159
	160	#define GFS2_ATTR(name, mode, show, store) \
	161	static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
	162
	163	GFS2_ATTR(id, 0444, id_show, NULL);
	164	GFS2_ATTR(fsname, 0444, fsname_show, NULL);
	165	GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
b3b94faa DT	166	GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
	167	GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
	168	GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
	169	GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
	170	GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
	171
	172	static struct attribute *gfs2_attrs[] = {
	173	&gfs2_attr_id.attr,
	174	&gfs2_attr_fsname.attr,
	175	&gfs2_attr_freeze.attr,
b3b94faa DT	176	&gfs2_attr_withdraw.attr,
	177	&gfs2_attr_statfs_sync.attr,
	178	&gfs2_attr_quota_sync.attr,
	179	&gfs2_attr_quota_refresh_user.attr,
	180	&gfs2_attr_quota_refresh_group.attr,
	181	NULL,
	182	};
	183
	184	static ssize_t gfs2_attr_show(struct kobject kobj, struct attribute attr,
	185	char *buf)
	186	{
	187	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	188	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	189	return a->show ? a->show(sdp, buf) : 0;
	190	}
	191
	192	static ssize_t gfs2_attr_store(struct kobject kobj, struct attribute attr,
	193	const char *buf, size_t len)
	194	{
	195	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	196	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	197	return a->store ? a->store(sdp, buf, len) : len;
	198	}
	199
	200	static struct sysfs_ops gfs2_attr_ops = {
	201	.show = gfs2_attr_show,
	202	.store = gfs2_attr_store,
	203	};
	204
	205	static struct kobj_type gfs2_ktype = {
	206	.default_attrs = gfs2_attrs,
	207	.sysfs_ops = &gfs2_attr_ops,
	208	};
	209
9bec101a	210	static struct kset *gfs2_kset;
b3b94faa DT	211
	212	/*
	213	* display struct lm_lockstruct fields
	214	*/
	215
	216	struct lockstruct_attr {
	217	struct attribute attr;
	218	ssize_t (show)(struct gfs2_sbd , char *);
	219	};
	220
	221	#define LOCKSTRUCT_ATTR(name, fmt) \
	222	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	223	{ \
3204a6c0	224	return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
b3b94faa DT	225	} \
	226	static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
	227
	228	LOCKSTRUCT_ATTR(jid, "%u\n");
	229	LOCKSTRUCT_ATTR(first, "%u\n");
	230	LOCKSTRUCT_ATTR(lvb_size, "%u\n");
	231	LOCKSTRUCT_ATTR(flags, "%d\n");
	232
	233	static struct attribute *lockstruct_attrs[] = {
	234	&lockstruct_attr_jid.attr,
	235	&lockstruct_attr_first.attr,
	236	&lockstruct_attr_lvb_size.attr,
	237	&lockstruct_attr_flags.attr,
ea67eedb	238	NULL,
b3b94faa DT	239	};
	240
	241	/*
	242	* display struct gfs2_args fields
	243	*/
	244
	245	struct args_attr {
	246	struct attribute attr;
	247	ssize_t (show)(struct gfs2_sbd , char *);
	248	};
	249
	250	#define ARGS_ATTR(name, fmt) \
	251	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	252	{ \
3204a6c0	253	return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name); \
b3b94faa DT	254	} \
	255	static struct args_attr args_attr_##name = __ATTR_RO(name)
	256
	257	ARGS_ATTR(lockproto, "%s\n");
	258	ARGS_ATTR(locktable, "%s\n");
	259	ARGS_ATTR(hostdata, "%s\n");
	260	ARGS_ATTR(spectator, "%d\n");
	261	ARGS_ATTR(ignore_local_fs, "%d\n");
	262	ARGS_ATTR(localcaching, "%d\n");
	263	ARGS_ATTR(localflocks, "%d\n");
	264	ARGS_ATTR(debug, "%d\n");
	265	ARGS_ATTR(upgrade, "%d\n");
b3b94faa DT	266	ARGS_ATTR(posix_acl, "%d\n");
	267	ARGS_ATTR(quota, "%u\n");
	268	ARGS_ATTR(suiddir, "%d\n");
	269	ARGS_ATTR(data, "%d\n");
	270
b3b94faa DT	271	static struct attribute *args_attrs[] = {
	272	&args_attr_lockproto.attr,
	273	&args_attr_locktable.attr,
	274	&args_attr_hostdata.attr,
	275	&args_attr_spectator.attr,
	276	&args_attr_ignore_local_fs.attr,
	277	&args_attr_localcaching.attr,
	278	&args_attr_localflocks.attr,
	279	&args_attr_debug.attr,
	280	&args_attr_upgrade.attr,
b3b94faa DT	281	&args_attr_posix_acl.attr,
	282	&args_attr_quota.attr,
	283	&args_attr_suiddir.attr,
	284	&args_attr_data.attr,
ea67eedb	285	NULL,
b3b94faa DT	286	};
b3b94faa DT	287
b3b94faa DT	288	/*
	289	* get and set struct gfs2_tune fields
	290	*/
	291
	292	static ssize_t quota_scale_show(struct gfs2_sbd sdp, char buf)
	293	{
3204a6c0 DT	294	return snprintf(buf, PAGE_SIZE, "%u %u\n",
	295	sdp->sd_tune.gt_quota_scale_num,
	296	sdp->sd_tune.gt_quota_scale_den);
b3b94faa DT	297	}
	298
	299	static ssize_t quota_scale_store(struct gfs2_sbd sdp, const char buf,
	300	size_t len)
	301	{
	302	struct gfs2_tune *gt = &sdp->sd_tune;
	303	unsigned int x, y;
	304
	305	if (!capable(CAP_SYS_ADMIN))
	306	return -EACCES;
	307
	308	if (sscanf(buf, "%u %u", &x, &y) != 2 \|\| !y)
	309	return -EINVAL;
	310
	311	spin_lock(&gt->gt_spin);
	312	gt->gt_quota_scale_num = x;
	313	gt->gt_quota_scale_den = y;
	314	spin_unlock(&gt->gt_spin);
	315	return len;
	316	}
	317
	318	static ssize_t tune_set(struct gfs2_sbd sdp, unsigned int field,
	319	int check_zero, const char *buf, size_t len)
	320	{
	321	struct gfs2_tune *gt = &sdp->sd_tune;
	322	unsigned int x;
	323
	324	if (!capable(CAP_SYS_ADMIN))
	325	return -EACCES;
	326
	327	x = simple_strtoul(buf, NULL, 0);
	328
	329	if (check_zero && !x)
	330	return -EINVAL;
	331
	332	spin_lock(&gt->gt_spin);
	333	*field = x;
	334	spin_unlock(&gt->gt_spin);
	335	return len;
	336	}
	337
	338	struct tune_attr {
	339	struct attribute attr;
	340	ssize_t (show)(struct gfs2_sbd , char *);
	341	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
	342	};
	343
	344	#define TUNE_ATTR_3(name, show, store) \
	345	static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
	346
	347	#define TUNE_ATTR_2(name, store) \
	348	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	349	{ \
3204a6c0	350	return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
b3b94faa DT	351	} \
	352	TUNE_ATTR_3(name, name##_show, store)
	353
	354	#define TUNE_ATTR(name, check_zero) \
	355	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	356	{ \
	357	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
	358	} \
	359	TUNE_ATTR_2(name, name##_store)
	360
	361	#define TUNE_ATTR_DAEMON(name, process) \
	362	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	363	{ \
	364	ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
	365	wake_up_process(sdp->sd_##process); \
	366	return r; \
	367	} \
	368	TUNE_ATTR_2(name, name##_store)
	369
b3b94faa DT	370	TUNE_ATTR(incore_log_blocks, 0);
b3b94faa DT	371	TUNE_ATTR(log_flush_secs, 0);
b3b94faa DT	372	TUNE_ATTR(quota_warn_period, 0);
b3b94faa DT	373	TUNE_ATTR(quota_quantum, 0);
b3b94faa DT	374	TUNE_ATTR(max_readahead, 0);
b3b94faa DT	375	TUNE_ATTR(complain_secs, 0);
b3b94faa DT	376	TUNE_ATTR(statfs_slow, 0);
b3b94faa DT	377	TUNE_ATTR(new_files_jdata, 0);
b3b94faa DT	378	TUNE_ATTR(quota_simul_sync, 1);
b3b94faa DT	379	TUNE_ATTR(quota_cache_secs, 1);
b3b94faa	380	TUNE_ATTR(stall_secs, 1);
b3b94faa	381	TUNE_ATTR(statfs_quantum, 1);
b3b94faa DT	382	TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
b3b94faa DT	383	TUNE_ATTR_DAEMON(logd_secs, logd_process);
b3b94faa DT	384	TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
	385
	386	static struct attribute *tune_attrs[] = {
b3b94faa DT	387	&tune_attr_incore_log_blocks.attr,
b3b94faa DT	388	&tune_attr_log_flush_secs.attr,
b3b94faa DT	389	&tune_attr_quota_warn_period.attr,
b3b94faa DT	390	&tune_attr_quota_quantum.attr,
b3b94faa DT	391	&tune_attr_max_readahead.attr,
b3b94faa DT	392	&tune_attr_complain_secs.attr,
b3b94faa DT	393	&tune_attr_statfs_slow.attr,
	394	&tune_attr_quota_simul_sync.attr,
	395	&tune_attr_quota_cache_secs.attr,
b3b94faa	396	&tune_attr_stall_secs.attr,
b3b94faa	397	&tune_attr_statfs_quantum.attr,
b3b94faa DT	398	&tune_attr_recoverd_secs.attr,
b3b94faa DT	399	&tune_attr_logd_secs.attr,
b3b94faa DT	400	&tune_attr_quota_scale.attr,
b3b94faa DT	401	&tune_attr_new_files_jdata.attr,
ea67eedb	402	NULL,
b3b94faa DT	403	};
	404
	405	static struct attribute_group lockstruct_group = {
	406	.name = "lockstruct",
ea67eedb	407	.attrs = lockstruct_attrs,
b3b94faa DT	408	};
b3b94faa DT	409
b3b94faa DT	410	static struct attribute_group args_group = {
b3b94faa DT	411	.name = "args",
ea67eedb	412	.attrs = args_attrs,
b3b94faa DT	413	};
	414
	415	static struct attribute_group tune_group = {
	416	.name = "tune",
ea67eedb	417	.attrs = tune_attrs,
b3b94faa DT	418	};
	419
	420	int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
	421	{
	422	int error;
	423
9bec101a	424	sdp->sd_kobj.kset = gfs2_kset;
901195ed GKH	425	error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
901195ed GKH	426	"%s", sdp->sd_table_name);
b3b94faa DT	427	if (error)
	428	goto fail;
	429
	430	error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
	431	if (error)
	432	goto fail_reg;
	433
b3b94faa DT	434	error = sysfs_create_group(&sdp->sd_kobj, &args_group);
b3b94faa DT	435	if (error)
97cc1025	436	goto fail_lockstruct;
b3b94faa DT	437
	438	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
	439	if (error)
	440	goto fail_args;
	441
901195ed	442	kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
b3b94faa DT	443	return 0;
b3b94faa DT	444
a91ea69f	445	fail_args:
b3b94faa	446	sysfs_remove_group(&sdp->sd_kobj, &args_group);
a91ea69f	447	fail_lockstruct:
b3b94faa	448	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
a91ea69f	449	fail_reg:
197b12d6	450	kobject_put(&sdp->sd_kobj);
a91ea69f	451	fail:
65952fb4	452	fs_err(sdp, "error %d adding sysfs files", error);
b3b94faa DT	453	return error;
	454	}
	455
	456	void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
	457	{
	458	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
	459	sysfs_remove_group(&sdp->sd_kobj, &args_group);
b3b94faa	460	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
197b12d6	461	kobject_put(&sdp->sd_kobj);
b3b94faa DT	462	}
b3b94faa DT	463
fdd1062e SW	464	static int gfs2_uevent(struct kset kset, struct kobject kobj,
	465	struct kobj_uevent_env *env)
	466	{
	467	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	468	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
	469	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
	470	return 0;
	471	}
	472
	473	static struct kset_uevent_ops gfs2_uevent_ops = {
	474	.uevent = gfs2_uevent,
	475	};
	476
	477
b3b94faa DT	478	int gfs2_sys_init(void)
	479	{
	480	gfs2_sys_margs = NULL;
	481	spin_lock_init(&gfs2_sys_margs_lock);
fdd1062e	482	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
9bec101a GKH	483	if (!gfs2_kset)
	484	return -ENOMEM;
	485	return 0;
b3b94faa DT	486	}
	487
	488	void gfs2_sys_uninit(void)
	489	{
	490	kfree(gfs2_sys_margs);
9bec101a	491	kset_unregister(gfs2_kset);
b3b94faa DT	492	}
b3b94faa DT	493