[deliverable/linux.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 <linux/gfs2_ondisk.h>
#include <asm/semaphore.h>
#include <asm/uaccess.h>

#include "gfs2.h"
#include "lm_interface.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 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;

	mutex_lock(&sdp->sd_freeze_lock);
	count = sdp->sd_freeze_count;
	mutex_unlock(&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(name, fmt)                                            \
static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                 \
{                                                                           \
	return sprintf(buf, 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 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>
5c676f6d	17	#include <linux/gfs2_ondisk.h>
b3b94faa DT	18	#include <asm/semaphore.h>
	19	#include <asm/uaccess.h>
	20
	21	#include "gfs2.h"
5c676f6d SW	22	#include "lm_interface.h"
5c676f6d SW	23	#include "incore.h"
b3b94faa DT	24	#include "lm.h"
	25	#include "sys.h"
	26	#include "super.h"
	27	#include "glock.h"
	28	#include "quota.h"
5c676f6d	29	#include "util.h"
b3b94faa DT	30
	31	char *gfs2_sys_margs;
	32	spinlock_t gfs2_sys_margs_lock;
	33
	34	static ssize_t id_show(struct gfs2_sbd sdp, char buf)
	35	{
	36	return sprintf(buf, "%s\n", sdp->sd_vfs->s_id);
	37	}
	38
	39	static ssize_t fsname_show(struct gfs2_sbd sdp, char buf)
	40	{
	41	return sprintf(buf, "%s\n", sdp->sd_fsname);
	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 DT	51
	52	return sprintf(buf, "%u\n", count);
	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);
	84	return sprintf(buf, "%u\n", b);
	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	{
142	uint32_t id;
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	{
156	uint32_t id;
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
225	static struct kset gfs2_kset = {
226	.subsys = &fs_subsys,
227	.kobj = {.name = "gfs2",},
228	.ktype = &gfs2_ktype,
229	};
230
231	/*
232	* display struct lm_lockstruct fields
233	*/
234
235	struct lockstruct_attr {
236	struct attribute attr;
237	ssize_t (show)(struct gfs2_sbd , char *);
238	};
239
240	#define LOCKSTRUCT_ATTR(name, fmt) \
241	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
242	{ \
243	return sprintf(buf, fmt, sdp->sd_lockstruct.ls_##name); \
244	} \
245	static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
246
247	LOCKSTRUCT_ATTR(jid, "%u\n");
248	LOCKSTRUCT_ATTR(first, "%u\n");
249	LOCKSTRUCT_ATTR(lvb_size, "%u\n");
250	LOCKSTRUCT_ATTR(flags, "%d\n");
251
252	static struct attribute *lockstruct_attrs[] = {
253	&lockstruct_attr_jid.attr,
254	&lockstruct_attr_first.attr,
255	&lockstruct_attr_lvb_size.attr,
256	&lockstruct_attr_flags.attr,
257	NULL
258	};
259
260	/*
261	* display struct gfs2_args fields
262	*/
263
264	struct args_attr {
265	struct attribute attr;
266	ssize_t (show)(struct gfs2_sbd , char *);
267	};
268
269	#define ARGS_ATTR(name, fmt) \
270	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
271	{ \
272	return sprintf(buf, fmt, sdp->sd_args.ar_##name); \
273	} \
274	static struct args_attr args_attr_##name = __ATTR_RO(name)
275
276	ARGS_ATTR(lockproto, "%s\n");
277	ARGS_ATTR(locktable, "%s\n");
278	ARGS_ATTR(hostdata, "%s\n");
279	ARGS_ATTR(spectator, "%d\n");
280	ARGS_ATTR(ignore_local_fs, "%d\n");
281	ARGS_ATTR(localcaching, "%d\n");
282	ARGS_ATTR(localflocks, "%d\n");
283	ARGS_ATTR(debug, "%d\n");
284	ARGS_ATTR(upgrade, "%d\n");
285	ARGS_ATTR(num_glockd, "%u\n");
286	ARGS_ATTR(posix_acl, "%d\n");
287	ARGS_ATTR(quota, "%u\n");
288	ARGS_ATTR(suiddir, "%d\n");
289	ARGS_ATTR(data, "%d\n");
290
291	/* one oddball doesn't fit the macro mold */
292	static ssize_t noatime_show(struct gfs2_sbd sdp, char buf)
293	{
294	return sprintf(buf, "%d\n", !!test_bit(SDF_NOATIME, &sdp->sd_flags));
295	}
296	static struct args_attr args_attr_noatime = __ATTR_RO(noatime);
297
298	static struct attribute *args_attrs[] = {
299	&args_attr_lockproto.attr,
300	&args_attr_locktable.attr,
301	&args_attr_hostdata.attr,
302	&args_attr_spectator.attr,
303	&args_attr_ignore_local_fs.attr,
304	&args_attr_localcaching.attr,
305	&args_attr_localflocks.attr,
306	&args_attr_debug.attr,
307	&args_attr_upgrade.attr,
308	&args_attr_num_glockd.attr,
309	&args_attr_posix_acl.attr,
310	&args_attr_quota.attr,
311	&args_attr_suiddir.attr,
312	&args_attr_data.attr,
313	&args_attr_noatime.attr,
314	NULL
315	};
316
317	/*
318	* display counters from superblock
319	*/
320
321	struct counters_attr {
322	struct attribute attr;
323	ssize_t (show)(struct gfs2_sbd , char *);
324	};
325
6a6b3d01	326	#define COUNTERS_ATTR(name, fmt) \
b3b94faa DT	327	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
b3b94faa DT	328	{ \
6a6b3d01	329	return sprintf(buf, fmt, (unsigned int)atomic_read(&sdp->sd_##name)); \
b3b94faa DT	330	} \
	331	static struct counters_attr counters_attr_##name = __ATTR_RO(name)
	332
6a6b3d01 DT	333	COUNTERS_ATTR(glock_count, "%u\n");
	334	COUNTERS_ATTR(glock_held_count, "%u\n");
	335	COUNTERS_ATTR(inode_count, "%u\n");
	336	COUNTERS_ATTR(reclaimed, "%u\n");
b3b94faa DT	337
	338	static struct attribute *counters_attrs[] = {
	339	&counters_attr_glock_count.attr,
	340	&counters_attr_glock_held_count.attr,
	341	&counters_attr_inode_count.attr,
b3b94faa	342	&counters_attr_reclaimed.attr,
b3b94faa DT	343	NULL
	344	};
	345
	346	/*
	347	* get and set struct gfs2_tune fields
	348	*/
	349
	350	static ssize_t quota_scale_show(struct gfs2_sbd sdp, char buf)
	351	{
	352	return sprintf(buf, "%u %u\n", sdp->sd_tune.gt_quota_scale_num,
	353	sdp->sd_tune.gt_quota_scale_den);
	354	}
	355
	356	static ssize_t quota_scale_store(struct gfs2_sbd sdp, const char buf,
	357	size_t len)
	358	{
	359	struct gfs2_tune *gt = &sdp->sd_tune;
	360	unsigned int x, y;
	361
	362	if (!capable(CAP_SYS_ADMIN))
	363	return -EACCES;
	364
	365	if (sscanf(buf, "%u %u", &x, &y) != 2 \|\| !y)
	366	return -EINVAL;
	367
	368	spin_lock(&gt->gt_spin);
	369	gt->gt_quota_scale_num = x;
	370	gt->gt_quota_scale_den = y;
	371	spin_unlock(&gt->gt_spin);
	372	return len;
	373	}
	374
	375	static ssize_t tune_set(struct gfs2_sbd sdp, unsigned int field,
	376	int check_zero, const char *buf, size_t len)
	377	{
	378	struct gfs2_tune *gt = &sdp->sd_tune;
	379	unsigned int x;
	380
	381	if (!capable(CAP_SYS_ADMIN))
	382	return -EACCES;
	383
	384	x = simple_strtoul(buf, NULL, 0);
	385
	386	if (check_zero && !x)
	387	return -EINVAL;
	388
	389	spin_lock(&gt->gt_spin);
	390	*field = x;
	391	spin_unlock(&gt->gt_spin);
	392	return len;
	393	}
	394
	395	struct tune_attr {
	396	struct attribute attr;
	397	ssize_t (show)(struct gfs2_sbd , char *);
	398	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
	399	};
	400
	401	#define TUNE_ATTR_3(name, show, store) \
	402	static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
	403
	404	#define TUNE_ATTR_2(name, store) \
	405	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	406	{ \
407	return sprintf(buf, "%u\n", sdp->sd_tune.gt_##name); \
408	} \
409	TUNE_ATTR_3(name, name##_show, store)
410
411	#define TUNE_ATTR(name, check_zero) \
412	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
413	{ \
414	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
415	} \
416	TUNE_ATTR_2(name, name##_store)
417
418	#define TUNE_ATTR_DAEMON(name, process) \
419	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
420	{ \
421	ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
422	wake_up_process(sdp->sd_##process); \
423	return r; \
424	} \
425	TUNE_ATTR_2(name, name##_store)
426
427	TUNE_ATTR(ilimit, 0);
428	TUNE_ATTR(ilimit_tries, 0);
429	TUNE_ATTR(ilimit_min, 0);
430	TUNE_ATTR(demote_secs, 0);
431	TUNE_ATTR(incore_log_blocks, 0);
432	TUNE_ATTR(log_flush_secs, 0);
433	TUNE_ATTR(jindex_refresh_secs, 0);
434	TUNE_ATTR(quota_warn_period, 0);
435	TUNE_ATTR(quota_quantum, 0);
436	TUNE_ATTR(atime_quantum, 0);
437	TUNE_ATTR(max_readahead, 0);
438	TUNE_ATTR(complain_secs, 0);
439	TUNE_ATTR(reclaim_limit, 0);
440	TUNE_ATTR(prefetch_secs, 0);
441	TUNE_ATTR(statfs_slow, 0);
442	TUNE_ATTR(new_files_jdata, 0);
443	TUNE_ATTR(new_files_directio, 0);
444	TUNE_ATTR(quota_simul_sync, 1);
445	TUNE_ATTR(quota_cache_secs, 1);
446	TUNE_ATTR(max_atomic_write, 1);
447	TUNE_ATTR(stall_secs, 1);
448	TUNE_ATTR(entries_per_readdir, 1);
449	TUNE_ATTR(greedy_default, 1);
450	TUNE_ATTR(greedy_quantum, 1);
451	TUNE_ATTR(greedy_max, 1);
452	TUNE_ATTR(statfs_quantum, 1);
453	TUNE_ATTR_DAEMON(scand_secs, scand_process);
454	TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
455	TUNE_ATTR_DAEMON(logd_secs, logd_process);
456	TUNE_ATTR_DAEMON(quotad_secs, quotad_process);
457	TUNE_ATTR_DAEMON(inoded_secs, inoded_process);
458	TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
459
460	static struct attribute *tune_attrs[] = {
461	&tune_attr_ilimit.attr,
462	&tune_attr_ilimit_tries.attr,
463	&tune_attr_ilimit_min.attr,
464	&tune_attr_demote_secs.attr,
465	&tune_attr_incore_log_blocks.attr,
466	&tune_attr_log_flush_secs.attr,
467	&tune_attr_jindex_refresh_secs.attr,
468	&tune_attr_quota_warn_period.attr,
469	&tune_attr_quota_quantum.attr,
470	&tune_attr_atime_quantum.attr,
471	&tune_attr_max_readahead.attr,
472	&tune_attr_complain_secs.attr,
473	&tune_attr_reclaim_limit.attr,
474	&tune_attr_prefetch_secs.attr,
475	&tune_attr_statfs_slow.attr,
476	&tune_attr_quota_simul_sync.attr,
477	&tune_attr_quota_cache_secs.attr,
478	&tune_attr_max_atomic_write.attr,
479	&tune_attr_stall_secs.attr,
480	&tune_attr_entries_per_readdir.attr,
481	&tune_attr_greedy_default.attr,
482	&tune_attr_greedy_quantum.attr,
483	&tune_attr_greedy_max.attr,
484	&tune_attr_statfs_quantum.attr,
485	&tune_attr_scand_secs.attr,
486	&tune_attr_recoverd_secs.attr,
487	&tune_attr_logd_secs.attr,
488	&tune_attr_quotad_secs.attr,
489	&tune_attr_inoded_secs.attr,
490	&tune_attr_quota_scale.attr,
491	&tune_attr_new_files_jdata.attr,
492	&tune_attr_new_files_directio.attr,
493	NULL
494	};
495
496	static struct attribute_group lockstruct_group = {
497	.name = "lockstruct",
498	.attrs = lockstruct_attrs
499	};
500
501	static struct attribute_group counters_group = {
502	.name = "counters",
503	.attrs = counters_attrs
504	};
505
506	static struct attribute_group args_group = {
507	.name = "args",
508	.attrs = args_attrs
509	};
510
511	static struct attribute_group tune_group = {
512	.name = "tune",
513	.attrs = tune_attrs
514	};
515
516	int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
517	{
518	int error;
519
520	sdp->sd_kobj.kset = &gfs2_kset;
521	sdp->sd_kobj.ktype = &gfs2_ktype;
522
523	error = kobject_set_name(&sdp->sd_kobj, "%s", sdp->sd_table_name);
524	if (error)
525	goto fail;
526
527	error = kobject_register(&sdp->sd_kobj);
528	if (error)
529	goto fail;
530
531	error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
532	if (error)
533	goto fail_reg;
534
535	error = sysfs_create_group(&sdp->sd_kobj, &counters_group);
536	if (error)
537	goto fail_lockstruct;
538
539	error = sysfs_create_group(&sdp->sd_kobj, &args_group);
540	if (error)
541	goto fail_counters;
542
543	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
544	if (error)
545	goto fail_args;
546
547	return 0;
548
549	fail_args:
550	sysfs_remove_group(&sdp->sd_kobj, &args_group);
551	fail_counters:
552	sysfs_remove_group(&sdp->sd_kobj, &counters_group);
553	fail_lockstruct:
554	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
555	fail_reg:
556	kobject_unregister(&sdp->sd_kobj);
557	fail:
558	return error;
559	}
560
561	void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
562	{
563	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
564	sysfs_remove_group(&sdp->sd_kobj, &args_group);
565	sysfs_remove_group(&sdp->sd_kobj, &counters_group);
566	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
567	kobject_unregister(&sdp->sd_kobj);
568	}
569
570	int gfs2_sys_init(void)
571	{
572	gfs2_sys_margs = NULL;
573	spin_lock_init(&gfs2_sys_margs_lock);
574	return kset_register(&gfs2_kset);
575	}
576
577	void gfs2_sys_uninit(void)
578	{
579	kfree(gfs2_sys_margs);
580	kset_unregister(&gfs2_kset);
581	}
582