[deliverable/linux.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 "lm.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 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)
{
	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(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;

/*
 * 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(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 snprintf(buf, PAGE_SIZE, "%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(name, fmt)                                            \
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                 \
{                                                                           \
	return snprintf(buf, PAGE_SIZE, fmt,                                \
			(unsigned int)atomic_read(&sdp->sd_##name));        \
}                                                                           \
static struct counters_attr counters_attr_##name = __ATTR_RO(name)

COUNTERS_ATTR(glock_count,      "%u\n");
COUNTERS_ATTR(glock_held_count, "%u\n");
COUNTERS_ATTR(inode_count,      "%u\n");
COUNTERS_ATTR(reclaimed,        "%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_reclaimed.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(demote_secs, 0);
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(atime_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(new_files_directio, 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_DAEMON(quotad_secs, quotad_process);
TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);

static struct attribute *tune_attrs[] = {
	&tune_attr_demote_secs.attr,
	&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_atime_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_quotad_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;
	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, &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;

	kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
	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_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, &counters_group);
	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
	kobject_put(&sdp->sd_kobj);
}

int gfs2_sys_init(void)
{
	gfs2_sys_margs = NULL;
	spin_lock_init(&gfs2_sys_margs_lock);
	gfs2_kset = kset_create_and_add("gfs2", NULL, 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 "lm.h"
	24	#include "sys.h"
	25	#include "super.h"
	26	#include "glock.h"
	27	#include "quota.h"
5c676f6d	28	#include "util.h"
b3b94faa DT	29
	30	char *gfs2_sys_margs;
	31	spinlock_t gfs2_sys_margs_lock;
	32
	33	static ssize_t id_show(struct gfs2_sbd sdp, char buf)
	34	{
c7227e46 BP	35	return snprintf(buf, PAGE_SIZE, "%u:%u\n",
c7227e46 BP	36	MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
b3b94faa DT	37	}
	38
	39	static ssize_t fsname_show(struct gfs2_sbd sdp, char buf)
	40	{
3204a6c0	41	return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
b3b94faa DT	42	}
	43
	44	static ssize_t freeze_show(struct gfs2_sbd sdp, char buf)
	45	{
	46	unsigned int count;
	47
f55ab26a	48	mutex_lock(&sdp->sd_freeze_lock);
b3b94faa	49	count = sdp->sd_freeze_count;
f55ab26a	50	mutex_unlock(&sdp->sd_freeze_lock);
b3b94faa	51
3204a6c0	52	return snprintf(buf, PAGE_SIZE, "%u\n", count);
b3b94faa DT	53	}
	54
	55	static ssize_t freeze_store(struct gfs2_sbd sdp, const char buf, size_t len)
	56	{
	57	ssize_t ret = len;
	58	int error = 0;
	59	int n = simple_strtol(buf, NULL, 0);
	60
	61	if (!capable(CAP_SYS_ADMIN))
	62	return -EACCES;
	63
	64	switch (n) {
	65	case 0:
	66	gfs2_unfreeze_fs(sdp);
	67	break;
	68	case 1:
	69	error = gfs2_freeze_fs(sdp);
	70	break;
	71	default:
	72	ret = -EINVAL;
	73	}
	74
	75	if (error)
	76	fs_warn(sdp, "freeze %d error %d", n, error);
	77
	78	return ret;
	79	}
	80
	81	static ssize_t withdraw_show(struct gfs2_sbd sdp, char buf)
	82	{
	83	unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
3204a6c0	84	return snprintf(buf, PAGE_SIZE, "%u\n", b);
b3b94faa DT	85	}
	86
	87	static ssize_t withdraw_store(struct gfs2_sbd sdp, const char buf, size_t len)
	88	{
	89	if (!capable(CAP_SYS_ADMIN))
	90	return -EACCES;
	91
	92	if (simple_strtol(buf, NULL, 0) != 1)
	93	return -EINVAL;
	94
	95	gfs2_lm_withdraw(sdp,
	96	"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
	97	sdp->sd_fsname);
	98	return len;
	99	}
	100
	101	static ssize_t statfs_sync_store(struct gfs2_sbd sdp, const char buf,
	102	size_t len)
	103	{
	104	if (!capable(CAP_SYS_ADMIN))
	105	return -EACCES;
	106
	107	if (simple_strtol(buf, NULL, 0) != 1)
	108	return -EINVAL;
	109
	110	gfs2_statfs_sync(sdp);
	111	return len;
	112	}
	113
	114	static ssize_t shrink_store(struct gfs2_sbd sdp, const char buf, 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_gl_hash_clear(sdp, NO_WAIT);
	123	return len;
	124	}
	125
	126	static ssize_t quota_sync_store(struct gfs2_sbd sdp, const char buf,
	127	size_t len)
	128	{
	129	if (!capable(CAP_SYS_ADMIN))
	130	return -EACCES;
	131
	132	if (simple_strtol(buf, NULL, 0) != 1)
	133	return -EINVAL;
	134
	135	gfs2_quota_sync(sdp);
	136	return len;
	137	}
	138
	139	static ssize_t quota_refresh_user_store(struct gfs2_sbd sdp, const char buf,
	140	size_t len)
	141	{
cd915493	142	u32 id;
b3b94faa DT	143
	144	if (!capable(CAP_SYS_ADMIN))
	145	return -EACCES;
	146
	147	id = simple_strtoul(buf, NULL, 0);
	148
	149	gfs2_quota_refresh(sdp, 1, id);
	150	return len;
	151	}
	152
	153	static ssize_t quota_refresh_group_store(struct gfs2_sbd sdp, const char buf,
	154	size_t len)
	155	{
cd915493	156	u32 id;
b3b94faa DT	157
	158	if (!capable(CAP_SYS_ADMIN))
	159	return -EACCES;
	160
	161	id = simple_strtoul(buf, NULL, 0);
	162
	163	gfs2_quota_refresh(sdp, 0, id);
	164	return len;
	165	}
	166
	167	struct gfs2_attr {
	168	struct attribute attr;
	169	ssize_t (show)(struct gfs2_sbd , char *);
	170	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
	171	};
	172
	173	#define GFS2_ATTR(name, mode, show, store) \
	174	static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
	175
	176	GFS2_ATTR(id, 0444, id_show, NULL);
	177	GFS2_ATTR(fsname, 0444, fsname_show, NULL);
	178	GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
	179	GFS2_ATTR(shrink, 0200, NULL, shrink_store);
	180	GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
	181	GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
	182	GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
	183	GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
	184	GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
	185
	186	static struct attribute *gfs2_attrs[] = {
	187	&gfs2_attr_id.attr,
	188	&gfs2_attr_fsname.attr,
	189	&gfs2_attr_freeze.attr,
	190	&gfs2_attr_shrink.attr,
	191	&gfs2_attr_withdraw.attr,
	192	&gfs2_attr_statfs_sync.attr,
	193	&gfs2_attr_quota_sync.attr,
	194	&gfs2_attr_quota_refresh_user.attr,
	195	&gfs2_attr_quota_refresh_group.attr,
	196	NULL,
	197	};
	198
	199	static ssize_t gfs2_attr_show(struct kobject kobj, struct attribute attr,
	200	char *buf)
	201	{
	202	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	203	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	204	return a->show ? a->show(sdp, buf) : 0;
	205	}
	206
	207	static ssize_t gfs2_attr_store(struct kobject kobj, struct attribute attr,
	208	const char *buf, size_t len)
	209	{
	210	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	211	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	212	return a->store ? a->store(sdp, buf, len) : len;
	213	}
	214
	215	static struct sysfs_ops gfs2_attr_ops = {
	216	.show = gfs2_attr_show,
	217	.store = gfs2_attr_store,
	218	};
	219
	220	static struct kobj_type gfs2_ktype = {
221	.default_attrs = gfs2_attrs,
222	.sysfs_ops = &gfs2_attr_ops,
223	};
224
9bec101a	225	static struct kset *gfs2_kset;
b3b94faa DT	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	{ \
3204a6c0	239	return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
b3b94faa DT	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,
ea67eedb	253	NULL,
b3b94faa DT	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	{ \
3204a6c0	268	return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name); \
b3b94faa DT	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	{
3204a6c0 DT	290	return snprintf(buf, PAGE_SIZE, "%d\n",
3204a6c0 DT	291	!!test_bit(SDF_NOATIME, &sdp->sd_flags));
b3b94faa DT	292	}
	293	static struct args_attr args_attr_noatime = __ATTR_RO(noatime);
	294
	295	static struct attribute *args_attrs[] = {
	296	&args_attr_lockproto.attr,
	297	&args_attr_locktable.attr,
	298	&args_attr_hostdata.attr,
	299	&args_attr_spectator.attr,
	300	&args_attr_ignore_local_fs.attr,
	301	&args_attr_localcaching.attr,
	302	&args_attr_localflocks.attr,
	303	&args_attr_debug.attr,
	304	&args_attr_upgrade.attr,
	305	&args_attr_num_glockd.attr,
	306	&args_attr_posix_acl.attr,
	307	&args_attr_quota.attr,
	308	&args_attr_suiddir.attr,
	309	&args_attr_data.attr,
	310	&args_attr_noatime.attr,
ea67eedb	311	NULL,
b3b94faa DT	312	};
	313
	314	/*
	315	* display counters from superblock
	316	*/
	317
	318	struct counters_attr {
	319	struct attribute attr;
	320	ssize_t (show)(struct gfs2_sbd , char *);
	321	};
	322
6a6b3d01	323	#define COUNTERS_ATTR(name, fmt) \
b3b94faa DT	324	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
b3b94faa DT	325	{ \
3204a6c0 DT	326	return snprintf(buf, PAGE_SIZE, fmt, \
3204a6c0 DT	327	(unsigned int)atomic_read(&sdp->sd_##name)); \
b3b94faa DT	328	} \
	329	static struct counters_attr counters_attr_##name = __ATTR_RO(name)
	330
6a6b3d01 DT	331	COUNTERS_ATTR(glock_count, "%u\n");
	332	COUNTERS_ATTR(glock_held_count, "%u\n");
	333	COUNTERS_ATTR(inode_count, "%u\n");
	334	COUNTERS_ATTR(reclaimed, "%u\n");
b3b94faa DT	335
	336	static struct attribute *counters_attrs[] = {
	337	&counters_attr_glock_count.attr,
	338	&counters_attr_glock_held_count.attr,
	339	&counters_attr_inode_count.attr,
b3b94faa	340	&counters_attr_reclaimed.attr,
ea67eedb	341	NULL,
b3b94faa DT	342	};
	343
	344	/*
	345	* get and set struct gfs2_tune fields
	346	*/
	347
	348	static ssize_t quota_scale_show(struct gfs2_sbd sdp, char buf)
	349	{
3204a6c0 DT	350	return snprintf(buf, PAGE_SIZE, "%u %u\n",
	351	sdp->sd_tune.gt_quota_scale_num,
	352	sdp->sd_tune.gt_quota_scale_den);
b3b94faa DT	353	}
	354
	355	static ssize_t quota_scale_store(struct gfs2_sbd sdp, const char buf,
	356	size_t len)
	357	{
	358	struct gfs2_tune *gt = &sdp->sd_tune;
	359	unsigned int x, y;
	360
	361	if (!capable(CAP_SYS_ADMIN))
	362	return -EACCES;
	363
	364	if (sscanf(buf, "%u %u", &x, &y) != 2 \|\| !y)
	365	return -EINVAL;
	366
	367	spin_lock(&gt->gt_spin);
	368	gt->gt_quota_scale_num = x;
	369	gt->gt_quota_scale_den = y;
	370	spin_unlock(&gt->gt_spin);
	371	return len;
	372	}
	373
	374	static ssize_t tune_set(struct gfs2_sbd sdp, unsigned int field,
	375	int check_zero, const char *buf, size_t len)
	376	{
	377	struct gfs2_tune *gt = &sdp->sd_tune;
	378	unsigned int x;
	379
	380	if (!capable(CAP_SYS_ADMIN))
	381	return -EACCES;
	382
	383	x = simple_strtoul(buf, NULL, 0);
	384
	385	if (check_zero && !x)
	386	return -EINVAL;
	387
	388	spin_lock(&gt->gt_spin);
	389	*field = x;
	390	spin_unlock(&gt->gt_spin);
	391	return len;
	392	}
	393
	394	struct tune_attr {
	395	struct attribute attr;
	396	ssize_t (show)(struct gfs2_sbd , char *);
	397	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
	398	};
	399
	400	#define TUNE_ATTR_3(name, show, store) \
	401	static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
	402
	403	#define TUNE_ATTR_2(name, store) \
	404	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	405	{ \
3204a6c0	406	return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
b3b94faa DT	407	} \
	408	TUNE_ATTR_3(name, name##_show, store)
	409
	410	#define TUNE_ATTR(name, check_zero) \
	411	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	412	{ \
	413	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
	414	} \
	415	TUNE_ATTR_2(name, name##_store)
	416
	417	#define TUNE_ATTR_DAEMON(name, process) \
	418	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	419	{ \
	420	ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
	421	wake_up_process(sdp->sd_##process); \
	422	return r; \
	423	} \
	424	TUNE_ATTR_2(name, name##_store)
	425
b3b94faa DT	426	TUNE_ATTR(demote_secs, 0);
	427	TUNE_ATTR(incore_log_blocks, 0);
	428	TUNE_ATTR(log_flush_secs, 0);
b3b94faa DT	429	TUNE_ATTR(quota_warn_period, 0);
	430	TUNE_ATTR(quota_quantum, 0);
	431	TUNE_ATTR(atime_quantum, 0);
	432	TUNE_ATTR(max_readahead, 0);
	433	TUNE_ATTR(complain_secs, 0);
b3b94faa DT	434	TUNE_ATTR(statfs_slow, 0);
	435	TUNE_ATTR(new_files_jdata, 0);
	436	TUNE_ATTR(new_files_directio, 0);
	437	TUNE_ATTR(quota_simul_sync, 1);
	438	TUNE_ATTR(quota_cache_secs, 1);
b3b94faa	439	TUNE_ATTR(stall_secs, 1);
b3b94faa	440	TUNE_ATTR(statfs_quantum, 1);
b3b94faa DT	441	TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
	442	TUNE_ATTR_DAEMON(logd_secs, logd_process);
	443	TUNE_ATTR_DAEMON(quotad_secs, quotad_process);
b3b94faa DT	444	TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
	445
	446	static struct attribute *tune_attrs[] = {
b3b94faa DT	447	&tune_attr_demote_secs.attr,
	448	&tune_attr_incore_log_blocks.attr,
	449	&tune_attr_log_flush_secs.attr,
b3b94faa DT	450	&tune_attr_quota_warn_period.attr,
	451	&tune_attr_quota_quantum.attr,
	452	&tune_attr_atime_quantum.attr,
	453	&tune_attr_max_readahead.attr,
	454	&tune_attr_complain_secs.attr,
b3b94faa DT	455	&tune_attr_statfs_slow.attr,
	456	&tune_attr_quota_simul_sync.attr,
	457	&tune_attr_quota_cache_secs.attr,
b3b94faa	458	&tune_attr_stall_secs.attr,
b3b94faa	459	&tune_attr_statfs_quantum.attr,
b3b94faa DT	460	&tune_attr_recoverd_secs.attr,
	461	&tune_attr_logd_secs.attr,
	462	&tune_attr_quotad_secs.attr,
b3b94faa DT	463	&tune_attr_quota_scale.attr,
	464	&tune_attr_new_files_jdata.attr,
	465	&tune_attr_new_files_directio.attr,
ea67eedb	466	NULL,
b3b94faa DT	467	};
	468
	469	static struct attribute_group lockstruct_group = {
	470	.name = "lockstruct",
ea67eedb	471	.attrs = lockstruct_attrs,
b3b94faa DT	472	};
	473
	474	static struct attribute_group counters_group = {
	475	.name = "counters",
ea67eedb	476	.attrs = counters_attrs,
b3b94faa DT	477	};
	478
	479	static struct attribute_group args_group = {
	480	.name = "args",
ea67eedb	481	.attrs = args_attrs,
b3b94faa DT	482	};
	483
	484	static struct attribute_group tune_group = {
	485	.name = "tune",
ea67eedb	486	.attrs = tune_attrs,
b3b94faa DT	487	};
	488
	489	int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
	490	{
	491	int error;
	492
9bec101a	493	sdp->sd_kobj.kset = gfs2_kset;
901195ed GKH	494	error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
901195ed GKH	495	"%s", sdp->sd_table_name);
b3b94faa DT	496	if (error)
	497	goto fail;
	498
	499	error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
	500	if (error)
	501	goto fail_reg;
	502
	503	error = sysfs_create_group(&sdp->sd_kobj, &counters_group);
	504	if (error)
	505	goto fail_lockstruct;
	506
	507	error = sysfs_create_group(&sdp->sd_kobj, &args_group);
	508	if (error)
	509	goto fail_counters;
	510
	511	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
	512	if (error)
	513	goto fail_args;
	514
901195ed	515	kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
b3b94faa DT	516	return 0;
b3b94faa DT	517
a91ea69f	518	fail_args:
b3b94faa	519	sysfs_remove_group(&sdp->sd_kobj, &args_group);
a91ea69f	520	fail_counters:
b3b94faa	521	sysfs_remove_group(&sdp->sd_kobj, &counters_group);
a91ea69f	522	fail_lockstruct:
b3b94faa	523	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
a91ea69f	524	fail_reg:
197b12d6	525	kobject_put(&sdp->sd_kobj);
a91ea69f	526	fail:
65952fb4	527	fs_err(sdp, "error %d adding sysfs files", error);
b3b94faa DT	528	return error;
	529	}
	530
	531	void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
	532	{
	533	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
	534	sysfs_remove_group(&sdp->sd_kobj, &args_group);
	535	sysfs_remove_group(&sdp->sd_kobj, &counters_group);
	536	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
197b12d6	537	kobject_put(&sdp->sd_kobj);
b3b94faa DT	538	}
	539
	540	int gfs2_sys_init(void)
	541	{
	542	gfs2_sys_margs = NULL;
	543	spin_lock_init(&gfs2_sys_margs_lock);
9bec101a GKH	544	gfs2_kset = kset_create_and_add("gfs2", NULL, fs_kobj);
	545	if (!gfs2_kset)
	546	return -ENOMEM;
	547	return 0;
b3b94faa DT	548	}
	549
	550	void gfs2_sys_uninit(void)
	551	{
	552	kfree(gfs2_sys_margs);
9bec101a	553	kset_unregister(gfs2_kset);
b3b94faa DT	554	}
b3b94faa DT	555