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

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

static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%u:%u\n",
			MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
}

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

static int gfs2_uuid_valid(const u8 *uuid)
{
	int i;

	for (i = 0; i < 16; i++) {
		if (uuid[i])
			return 1;
	}
	return 0;
}

static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
{
	const u8 *uuid = sdp->sd_sb.sb_uuid;
	buf[0] = '\0';
	if (!gfs2_uuid_valid(uuid))
		return 0;
	return snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X-%02X%02X-"
			"%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
			uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5],
			uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11],
			uuid[12], uuid[13], uuid[14], uuid[15]);
}

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;
}

static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	struct gfs2_glock *gl;
	const struct gfs2_glock_operations *glops;
	unsigned int glmode;
	unsigned int gltype;
	unsigned long long glnum;
	char mode[16];
	int rv;

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

	rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
		    mode);
	if (rv != 3)
		return -EINVAL;

	if (strcmp(mode, "EX") == 0)
		glmode = LM_ST_UNLOCKED;
	else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
		glmode = LM_ST_DEFERRED;
	else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
		glmode = LM_ST_SHARED;
	else
		return -EINVAL;

	if (gltype > LM_TYPE_JOURNAL)
		return -EINVAL;
	glops = gfs2_glops_list[gltype];
	if (glops == NULL)
		return -EINVAL;
	rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
	if (rv)
		return rv;
	gfs2_glock_cb(gl, glmode);
	gfs2_glock_put(gl);
	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(uuid,                0444, uuid_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);
GFS2_ATTR(demote_rq,           0200, NULL,	    demote_rq_store);

static struct attribute *gfs2_attrs[] = {
	&gfs2_attr_id.attr,
	&gfs2_attr_fsname.attr,
	&gfs2_attr_uuid.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,
	&gfs2_attr_demote_rq.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");

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

/*
 * lock_module. Originally from lock_dlm
 */

static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
{
	const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
	return sprintf(buf, "%s\n", ops->lm_proto_name);
}

static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	ssize_t ret;
	int val = 0;

	if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
		val = 1;
	ret = sprintf(buf, "%d\n", val);
	return ret;
}

static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	ssize_t ret = len;
	int val;

	val = simple_strtol(buf, NULL, 0);

	if (val == 1)
		set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
	else if (val == 0) {
		clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
		smp_mb__after_clear_bit();
		gfs2_glock_thaw(sdp);
	} else {
		ret = -EINVAL;
	}
	return ret;
}

static ssize_t lkid_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%u\n", ls->ls_id);
}

static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%d\n", ls->ls_first);
}

static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%d\n", ls->ls_first_done);
}

static ssize_t recover_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%d\n", ls->ls_recover_jid);
}

static void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid)
{
	struct gfs2_jdesc *jd;

	spin_lock(&sdp->sd_jindex_spin);
	list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
		if (jd->jd_jid != jid)
			continue;
		jd->jd_dirty = 1;
		break;
	}
	spin_unlock(&sdp->sd_jindex_spin);
}

static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	ls->ls_recover_jid = simple_strtol(buf, NULL, 0);
	gfs2_jdesc_make_dirty(sdp, ls->ls_recover_jid);
	if (sdp->sd_recoverd_process)
		wake_up_process(sdp->sd_recoverd_process);
	return len;
}

static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
}

static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
{
	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
}

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

#define GDLM_ATTR(_name,_mode,_show,_store) \
static struct gdlm_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)

GDLM_ATTR(proto_name,     0444, proto_name_show,     NULL);
GDLM_ATTR(block,          0644, block_show,          block_store);
GDLM_ATTR(withdraw,       0644, withdraw_show,       withdraw_store);
GDLM_ATTR(id,             0444, lkid_show,           NULL);
GDLM_ATTR(first,          0444, lkfirst_show,        NULL);
GDLM_ATTR(first_done,     0444, first_done_show,     NULL);
GDLM_ATTR(recover,        0644, recover_show,        recover_store);
GDLM_ATTR(recover_done,   0444, recover_done_show,   NULL);
GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);

static struct attribute *lock_module_attrs[] = {
	&gdlm_attr_proto_name.attr,
	&gdlm_attr_block.attr,
	&gdlm_attr_withdraw.attr,
	&gdlm_attr_id.attr,
	&lockstruct_attr_jid.attr,
	&gdlm_attr_first.attr,
	&gdlm_attr_first_done.attr,
	&gdlm_attr_recover.attr,
	&gdlm_attr_recover_done.attr,
	&gdlm_attr_recover_status.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(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_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,
};

static struct attribute_group lock_module_group = {
	.name = "lock_module",
	.attrs = lock_module_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;

	error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
	if (error)
		goto fail_tune;

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

fail_tune:
	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
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);
	sysfs_remove_group(&sdp->sd_kobj, &lock_module_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);
	const u8 *uuid = sdp->sd_sb.sb_uuid;

	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
	if (gfs2_uuid_valid(uuid)) {
		add_uevent_var(env, "UUID=%02X%02X%02X%02X-%02X%02X-%02X%02X-"
			       "%02X%02X-%02X%02X%02X%02X%02X%02X",
			       uuid[0], uuid[1], uuid[2], uuid[3], uuid[4],
			       uuid[5], uuid[6], uuid[7], uuid[8], uuid[9],
			       uuid[10], uuid[11], uuid[12], uuid[13],
			       uuid[14], uuid[15]);
	}
	return 0;
}

static struct kset_uevent_ops gfs2_uevent_ops = {
	.uevent = gfs2_uevent,
};


int gfs2_sys_init(void)
{
	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
	if (!gfs2_kset)
		return -ENOMEM;
	return 0;
}

void gfs2_sys_uninit(void)
{
	kset_unregister(gfs2_kset);
}
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
	9
	10	#include <linux/sched.h>
	11	#include <linux/slab.h>
	12	#include <linux/spinlock.h>
	13	#include <linux/completion.h>
	14	#include <linux/buffer_head.h>
	15	#include <linux/module.h>
	16	#include <linux/kobject.h>
b3b94faa	17	#include <asm/uaccess.h>
f057f6cd	18	#include <linux/gfs2_ondisk.h>
b3b94faa DT	19
b3b94faa DT	20	#include "gfs2.h"
5c676f6d	21	#include "incore.h"
b3b94faa DT	22	#include "sys.h"
	23	#include "super.h"
	24	#include "glock.h"
	25	#include "quota.h"
5c676f6d	26	#include "util.h"
64d576ba	27	#include "glops.h"
b3b94faa	28
b3b94faa DT	29	static ssize_t id_show(struct gfs2_sbd sdp, char buf)
b3b94faa DT	30	{
c7227e46 BP	31	return snprintf(buf, PAGE_SIZE, "%u:%u\n",
c7227e46 BP	32	MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
b3b94faa DT	33	}
	34
	35	static ssize_t fsname_show(struct gfs2_sbd sdp, char buf)
	36	{
3204a6c0	37	return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
b3b94faa DT	38	}
b3b94faa DT	39
02e3cc70 SW	40	static int gfs2_uuid_valid(const u8 *uuid)
	41	{
	42	int i;
	43
	44	for (i = 0; i < 16; i++) {
	45	if (uuid[i])
	46	return 1;
	47	}
	48	return 0;
	49	}
	50
	51	static ssize_t uuid_show(struct gfs2_sbd sdp, char buf)
	52	{
	53	const u8 *uuid = sdp->sd_sb.sb_uuid;
	54	buf[0] = '\0';
	55	if (!gfs2_uuid_valid(uuid))
	56	return 0;
	57	return snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X-%02X%02X-"
	58	"%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
	59	uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5],
	60	uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11],
	61	uuid[12], uuid[13], uuid[14], uuid[15]);
	62	}
	63
b3b94faa DT	64	static ssize_t freeze_show(struct gfs2_sbd sdp, char buf)
	65	{
	66	unsigned int count;
	67
f55ab26a	68	mutex_lock(&sdp->sd_freeze_lock);
b3b94faa	69	count = sdp->sd_freeze_count;
f55ab26a	70	mutex_unlock(&sdp->sd_freeze_lock);
b3b94faa	71
3204a6c0	72	return snprintf(buf, PAGE_SIZE, "%u\n", count);
b3b94faa DT	73	}
	74
	75	static ssize_t freeze_store(struct gfs2_sbd sdp, const char buf, size_t len)
	76	{
	77	ssize_t ret = len;
	78	int error = 0;
	79	int n = simple_strtol(buf, NULL, 0);
	80
	81	if (!capable(CAP_SYS_ADMIN))
	82	return -EACCES;
	83
	84	switch (n) {
	85	case 0:
	86	gfs2_unfreeze_fs(sdp);
	87	break;
	88	case 1:
	89	error = gfs2_freeze_fs(sdp);
	90	break;
	91	default:
	92	ret = -EINVAL;
	93	}
	94
	95	if (error)
	96	fs_warn(sdp, "freeze %d error %d", n, error);
	97
	98	return ret;
	99	}
	100
	101	static ssize_t withdraw_show(struct gfs2_sbd sdp, char buf)
	102	{
	103	unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
3204a6c0	104	return snprintf(buf, PAGE_SIZE, "%u\n", b);
b3b94faa DT	105	}
	106
	107	static ssize_t withdraw_store(struct gfs2_sbd sdp, const char buf, size_t len)
	108	{
	109	if (!capable(CAP_SYS_ADMIN))
	110	return -EACCES;
	111
	112	if (simple_strtol(buf, NULL, 0) != 1)
	113	return -EINVAL;
	114
	115	gfs2_lm_withdraw(sdp,
	116	"GFS2: fsid=%s: withdrawing from cluster at user's request\n",
	117	sdp->sd_fsname);
	118	return len;
	119	}
	120
	121	static ssize_t statfs_sync_store(struct gfs2_sbd sdp, const char buf,
	122	size_t len)
	123	{
	124	if (!capable(CAP_SYS_ADMIN))
	125	return -EACCES;
	126
	127	if (simple_strtol(buf, NULL, 0) != 1)
	128	return -EINVAL;
	129
	130	gfs2_statfs_sync(sdp);
	131	return len;
	132	}
	133
b3b94faa DT	134	static ssize_t quota_sync_store(struct gfs2_sbd sdp, const char buf,
	135	size_t len)
	136	{
	137	if (!capable(CAP_SYS_ADMIN))
	138	return -EACCES;
	139
	140	if (simple_strtol(buf, NULL, 0) != 1)
	141	return -EINVAL;
	142
	143	gfs2_quota_sync(sdp);
	144	return len;
	145	}
	146
	147	static ssize_t quota_refresh_user_store(struct gfs2_sbd sdp, const char buf,
	148	size_t len)
	149	{
cd915493	150	u32 id;
b3b94faa DT	151
	152	if (!capable(CAP_SYS_ADMIN))
	153	return -EACCES;
	154
	155	id = simple_strtoul(buf, NULL, 0);
	156
	157	gfs2_quota_refresh(sdp, 1, id);
	158	return len;
	159	}
	160
	161	static ssize_t quota_refresh_group_store(struct gfs2_sbd sdp, const char buf,
	162	size_t len)
	163	{
cd915493	164	u32 id;
b3b94faa DT	165
	166	if (!capable(CAP_SYS_ADMIN))
	167	return -EACCES;
	168
	169	id = simple_strtoul(buf, NULL, 0);
	170
	171	gfs2_quota_refresh(sdp, 0, id);
	172	return len;
	173	}
	174
64d576ba SW	175	static ssize_t demote_rq_store(struct gfs2_sbd sdp, const char buf, size_t len)
	176	{
	177	struct gfs2_glock *gl;
	178	const struct gfs2_glock_operations *glops;
	179	unsigned int glmode;
	180	unsigned int gltype;
	181	unsigned long long glnum;
	182	char mode[16];
	183	int rv;
	184
	185	if (!capable(CAP_SYS_ADMIN))
	186	return -EACCES;
	187
	188	rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
	189	mode);
	190	if (rv != 3)
	191	return -EINVAL;
	192
	193	if (strcmp(mode, "EX") == 0)
	194	glmode = LM_ST_UNLOCKED;
	195	else if ((strcmp(mode, "CW") == 0) \|\| (strcmp(mode, "DF") == 0))
	196	glmode = LM_ST_DEFERRED;
	197	else if ((strcmp(mode, "PR") == 0) \|\| (strcmp(mode, "SH") == 0))
	198	glmode = LM_ST_SHARED;
	199	else
	200	return -EINVAL;
	201
	202	if (gltype > LM_TYPE_JOURNAL)
	203	return -EINVAL;
	204	glops = gfs2_glops_list[gltype];
	205	if (glops == NULL)
	206	return -EINVAL;
	207	rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
	208	if (rv)
	209	return rv;
	210	gfs2_glock_cb(gl, glmode);
	211	gfs2_glock_put(gl);
	212	return len;
	213	}
	214
b3b94faa DT	215	struct gfs2_attr {
	216	struct attribute attr;
	217	ssize_t (show)(struct gfs2_sbd , char *);
	218	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
	219	};
	220
	221	#define GFS2_ATTR(name, mode, show, store) \
	222	static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
	223
	224	GFS2_ATTR(id, 0444, id_show, NULL);
	225	GFS2_ATTR(fsname, 0444, fsname_show, NULL);
02e3cc70	226	GFS2_ATTR(uuid, 0444, uuid_show, NULL);
b3b94faa	227	GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
b3b94faa DT	228	GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
	229	GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
	230	GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
	231	GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
	232	GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
64d576ba	233	GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
b3b94faa DT	234
	235	static struct attribute *gfs2_attrs[] = {
	236	&gfs2_attr_id.attr,
	237	&gfs2_attr_fsname.attr,
02e3cc70	238	&gfs2_attr_uuid.attr,
b3b94faa	239	&gfs2_attr_freeze.attr,
b3b94faa DT	240	&gfs2_attr_withdraw.attr,
	241	&gfs2_attr_statfs_sync.attr,
	242	&gfs2_attr_quota_sync.attr,
	243	&gfs2_attr_quota_refresh_user.attr,
	244	&gfs2_attr_quota_refresh_group.attr,
64d576ba	245	&gfs2_attr_demote_rq.attr,
b3b94faa DT	246	NULL,
	247	};
	248
	249	static ssize_t gfs2_attr_show(struct kobject kobj, struct attribute attr,
	250	char *buf)
	251	{
	252	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	253	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	254	return a->show ? a->show(sdp, buf) : 0;
	255	}
	256
	257	static ssize_t gfs2_attr_store(struct kobject kobj, struct attribute attr,
	258	const char *buf, size_t len)
	259	{
	260	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
	261	struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
	262	return a->store ? a->store(sdp, buf, len) : len;
	263	}
	264
	265	static struct sysfs_ops gfs2_attr_ops = {
	266	.show = gfs2_attr_show,
	267	.store = gfs2_attr_store,
	268	};
	269
	270	static struct kobj_type gfs2_ktype = {
	271	.default_attrs = gfs2_attrs,
	272	.sysfs_ops = &gfs2_attr_ops,
	273	};
	274
9bec101a	275	static struct kset *gfs2_kset;
b3b94faa DT	276
	277	/*
	278	* display struct lm_lockstruct fields
	279	*/
	280
	281	struct lockstruct_attr {
	282	struct attribute attr;
	283	ssize_t (show)(struct gfs2_sbd , char *);
	284	};
	285
	286	#define LOCKSTRUCT_ATTR(name, fmt) \
	287	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	288	{ \
3204a6c0	289	return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
b3b94faa DT	290	} \
	291	static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
	292
	293	LOCKSTRUCT_ATTR(jid, "%u\n");
	294	LOCKSTRUCT_ATTR(first, "%u\n");
b3b94faa DT	295
	296	static struct attribute *lockstruct_attrs[] = {
	297	&lockstruct_attr_jid.attr,
	298	&lockstruct_attr_first.attr,
f057f6cd SW	299	NULL,
	300	};
	301
	302	/*
	303	* lock_module. Originally from lock_dlm
	304	*/
	305
	306	static ssize_t proto_name_show(struct gfs2_sbd sdp, char buf)
	307	{
	308	const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
	309	return sprintf(buf, "%s\n", ops->lm_proto_name);
	310	}
	311
	312	static ssize_t block_show(struct gfs2_sbd sdp, char buf)
	313	{
	314	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	315	ssize_t ret;
	316	int val = 0;
	317
	318	if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
	319	val = 1;
	320	ret = sprintf(buf, "%d\n", val);
	321	return ret;
	322	}
	323
	324	static ssize_t block_store(struct gfs2_sbd sdp, const char buf, size_t len)
	325	{
	326	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	327	ssize_t ret = len;
	328	int val;
	329
	330	val = simple_strtol(buf, NULL, 0);
	331
	332	if (val == 1)
	333	set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
	334	else if (val == 0) {
	335	clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
	336	smp_mb__after_clear_bit();
	337	gfs2_glock_thaw(sdp);
	338	} else {
	339	ret = -EINVAL;
	340	}
	341	return ret;
	342	}
	343
	344	static ssize_t lkid_show(struct gfs2_sbd sdp, char buf)
	345	{
	346	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	347	return sprintf(buf, "%u\n", ls->ls_id);
	348	}
	349
	350	static ssize_t lkfirst_show(struct gfs2_sbd sdp, char buf)
	351	{
	352	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	353	return sprintf(buf, "%d\n", ls->ls_first);
	354	}
	355
	356	static ssize_t first_done_show(struct gfs2_sbd sdp, char buf)
	357	{
	358	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
	359	return sprintf(buf, "%d\n", ls->ls_first_done);
	360	}
	361
	362	static ssize_t recover_show(struct gfs2_sbd sdp, char buf)
363	{
364	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
365	return sprintf(buf, "%d\n", ls->ls_recover_jid);
366	}
367
368	static void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid)
369	{
370	struct gfs2_jdesc *jd;
371
372	spin_lock(&sdp->sd_jindex_spin);
373	list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
374	if (jd->jd_jid != jid)
375	continue;
376	jd->jd_dirty = 1;
377	break;
378	}
379	spin_unlock(&sdp->sd_jindex_spin);
380	}
381
382	static ssize_t recover_store(struct gfs2_sbd sdp, const char buf, size_t len)
383	{
384	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
385	ls->ls_recover_jid = simple_strtol(buf, NULL, 0);
386	gfs2_jdesc_make_dirty(sdp, ls->ls_recover_jid);
387	if (sdp->sd_recoverd_process)
388	wake_up_process(sdp->sd_recoverd_process);
389	return len;
390	}
391
392	static ssize_t recover_done_show(struct gfs2_sbd sdp, char buf)
393	{
394	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
395	return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
396	}
397
398	static ssize_t recover_status_show(struct gfs2_sbd sdp, char buf)
399	{
400	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
401	return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
402	}
403
404	struct gdlm_attr {
405	struct attribute attr;
406	ssize_t (show)(struct gfs2_sbd sdp, char *);
407	ssize_t (store)(struct gfs2_sbd sdp, const char *, size_t);
408	};
409
410	#define GDLM_ATTR(_name,_mode,_show,_store) \
411	static struct gdlm_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
412
413	GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
414	GDLM_ATTR(block, 0644, block_show, block_store);
415	GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
416	GDLM_ATTR(id, 0444, lkid_show, NULL);
417	GDLM_ATTR(first, 0444, lkfirst_show, NULL);
418	GDLM_ATTR(first_done, 0444, first_done_show, NULL);
419	GDLM_ATTR(recover, 0644, recover_show, recover_store);
420	GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
421	GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
422
423	static struct attribute *lock_module_attrs[] = {
424	&gdlm_attr_proto_name.attr,
425	&gdlm_attr_block.attr,
426	&gdlm_attr_withdraw.attr,
427	&gdlm_attr_id.attr,
428	&lockstruct_attr_jid.attr,
429	&gdlm_attr_first.attr,
430	&gdlm_attr_first_done.attr,
431	&gdlm_attr_recover.attr,
432	&gdlm_attr_recover_done.attr,
433	&gdlm_attr_recover_status.attr,
ea67eedb	434	NULL,
b3b94faa DT	435	};
	436
	437	/*
	438	* display struct gfs2_args fields
	439	*/
	440
	441	struct args_attr {
	442	struct attribute attr;
	443	ssize_t (show)(struct gfs2_sbd , char *);
	444	};
	445
	446	#define ARGS_ATTR(name, fmt) \
	447	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	448	{ \
3204a6c0	449	return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name); \
b3b94faa DT	450	} \
	451	static struct args_attr args_attr_##name = __ATTR_RO(name)
	452
	453	ARGS_ATTR(lockproto, "%s\n");
	454	ARGS_ATTR(locktable, "%s\n");
	455	ARGS_ATTR(hostdata, "%s\n");
	456	ARGS_ATTR(spectator, "%d\n");
	457	ARGS_ATTR(ignore_local_fs, "%d\n");
	458	ARGS_ATTR(localcaching, "%d\n");
	459	ARGS_ATTR(localflocks, "%d\n");
	460	ARGS_ATTR(debug, "%d\n");
	461	ARGS_ATTR(upgrade, "%d\n");
b3b94faa DT	462	ARGS_ATTR(posix_acl, "%d\n");
	463	ARGS_ATTR(quota, "%u\n");
	464	ARGS_ATTR(suiddir, "%d\n");
	465	ARGS_ATTR(data, "%d\n");
	466
b3b94faa DT	467	static struct attribute *args_attrs[] = {
	468	&args_attr_lockproto.attr,
	469	&args_attr_locktable.attr,
	470	&args_attr_hostdata.attr,
	471	&args_attr_spectator.attr,
	472	&args_attr_ignore_local_fs.attr,
	473	&args_attr_localcaching.attr,
	474	&args_attr_localflocks.attr,
	475	&args_attr_debug.attr,
	476	&args_attr_upgrade.attr,
b3b94faa DT	477	&args_attr_posix_acl.attr,
	478	&args_attr_quota.attr,
	479	&args_attr_suiddir.attr,
	480	&args_attr_data.attr,
ea67eedb	481	NULL,
b3b94faa DT	482	};
b3b94faa DT	483
b3b94faa DT	484	/*
	485	* get and set struct gfs2_tune fields
	486	*/
	487
	488	static ssize_t quota_scale_show(struct gfs2_sbd sdp, char buf)
	489	{
3204a6c0 DT	490	return snprintf(buf, PAGE_SIZE, "%u %u\n",
	491	sdp->sd_tune.gt_quota_scale_num,
	492	sdp->sd_tune.gt_quota_scale_den);
b3b94faa DT	493	}
	494
	495	static ssize_t quota_scale_store(struct gfs2_sbd sdp, const char buf,
	496	size_t len)
	497	{
	498	struct gfs2_tune *gt = &sdp->sd_tune;
	499	unsigned int x, y;
	500
	501	if (!capable(CAP_SYS_ADMIN))
	502	return -EACCES;
	503
	504	if (sscanf(buf, "%u %u", &x, &y) != 2 \|\| !y)
	505	return -EINVAL;
	506
	507	spin_lock(&gt->gt_spin);
	508	gt->gt_quota_scale_num = x;
	509	gt->gt_quota_scale_den = y;
	510	spin_unlock(&gt->gt_spin);
	511	return len;
	512	}
	513
	514	static ssize_t tune_set(struct gfs2_sbd sdp, unsigned int field,
	515	int check_zero, const char *buf, size_t len)
	516	{
	517	struct gfs2_tune *gt = &sdp->sd_tune;
	518	unsigned int x;
	519
	520	if (!capable(CAP_SYS_ADMIN))
	521	return -EACCES;
	522
	523	x = simple_strtoul(buf, NULL, 0);
	524
	525	if (check_zero && !x)
	526	return -EINVAL;
	527
	528	spin_lock(&gt->gt_spin);
	529	*field = x;
	530	spin_unlock(&gt->gt_spin);
	531	return len;
	532	}
	533
	534	struct tune_attr {
	535	struct attribute attr;
	536	ssize_t (show)(struct gfs2_sbd , char *);
	537	ssize_t (store)(struct gfs2_sbd , const char *, size_t);
	538	};
	539
	540	#define TUNE_ATTR_3(name, show, store) \
	541	static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
	542
	543	#define TUNE_ATTR_2(name, store) \
	544	static ssize_t name##_show(struct gfs2_sbd sdp, char buf) \
	545	{ \
3204a6c0	546	return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
b3b94faa DT	547	} \
	548	TUNE_ATTR_3(name, name##_show, store)
	549
	550	#define TUNE_ATTR(name, check_zero) \
	551	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	552	{ \
	553	return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
	554	} \
	555	TUNE_ATTR_2(name, name##_store)
	556
	557	#define TUNE_ATTR_DAEMON(name, process) \
	558	static ssize_t name##_store(struct gfs2_sbd sdp, const char buf, size_t len)\
	559	{ \
	560	ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
	561	wake_up_process(sdp->sd_##process); \
	562	return r; \
	563	} \
	564	TUNE_ATTR_2(name, name##_store)
	565
b3b94faa DT	566	TUNE_ATTR(incore_log_blocks, 0);
b3b94faa DT	567	TUNE_ATTR(log_flush_secs, 0);
b3b94faa DT	568	TUNE_ATTR(quota_warn_period, 0);
b3b94faa DT	569	TUNE_ATTR(quota_quantum, 0);
b3b94faa DT	570	TUNE_ATTR(max_readahead, 0);
b3b94faa DT	571	TUNE_ATTR(complain_secs, 0);
b3b94faa DT	572	TUNE_ATTR(statfs_slow, 0);
b3b94faa DT	573	TUNE_ATTR(new_files_jdata, 0);
b3b94faa	574	TUNE_ATTR(quota_simul_sync, 1);
b3b94faa	575	TUNE_ATTR(stall_secs, 1);
b3b94faa	576	TUNE_ATTR(statfs_quantum, 1);
b3b94faa DT	577	TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
b3b94faa DT	578	TUNE_ATTR_DAEMON(logd_secs, logd_process);
b3b94faa DT	579	TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
	580
	581	static struct attribute *tune_attrs[] = {
b3b94faa DT	582	&tune_attr_incore_log_blocks.attr,
b3b94faa DT	583	&tune_attr_log_flush_secs.attr,
b3b94faa DT	584	&tune_attr_quota_warn_period.attr,
b3b94faa DT	585	&tune_attr_quota_quantum.attr,
b3b94faa DT	586	&tune_attr_max_readahead.attr,
b3b94faa DT	587	&tune_attr_complain_secs.attr,
b3b94faa DT	588	&tune_attr_statfs_slow.attr,
b3b94faa DT	589	&tune_attr_quota_simul_sync.attr,
b3b94faa	590	&tune_attr_stall_secs.attr,
b3b94faa	591	&tune_attr_statfs_quantum.attr,
b3b94faa DT	592	&tune_attr_recoverd_secs.attr,
b3b94faa DT	593	&tune_attr_logd_secs.attr,
b3b94faa DT	594	&tune_attr_quota_scale.attr,
b3b94faa DT	595	&tune_attr_new_files_jdata.attr,
ea67eedb	596	NULL,
b3b94faa DT	597	};
	598
	599	static struct attribute_group lockstruct_group = {
	600	.name = "lockstruct",
ea67eedb	601	.attrs = lockstruct_attrs,
b3b94faa DT	602	};
b3b94faa DT	603
b3b94faa DT	604	static struct attribute_group args_group = {
b3b94faa DT	605	.name = "args",
ea67eedb	606	.attrs = args_attrs,
b3b94faa DT	607	};
	608
	609	static struct attribute_group tune_group = {
	610	.name = "tune",
ea67eedb	611	.attrs = tune_attrs,
b3b94faa DT	612	};
b3b94faa DT	613
f057f6cd SW	614	static struct attribute_group lock_module_group = {
	615	.name = "lock_module",
	616	.attrs = lock_module_attrs,
	617	};
	618
b3b94faa DT	619	int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
	620	{
	621	int error;
	622
9bec101a	623	sdp->sd_kobj.kset = gfs2_kset;
901195ed GKH	624	error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
901195ed GKH	625	"%s", sdp->sd_table_name);
b3b94faa DT	626	if (error)
	627	goto fail;
	628
	629	error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
	630	if (error)
	631	goto fail_reg;
	632
b3b94faa DT	633	error = sysfs_create_group(&sdp->sd_kobj, &args_group);
b3b94faa DT	634	if (error)
97cc1025	635	goto fail_lockstruct;
b3b94faa DT	636
	637	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
	638	if (error)
	639	goto fail_args;
	640
f057f6cd SW	641	error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
	642	if (error)
	643	goto fail_tune;
	644
901195ed	645	kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
b3b94faa DT	646	return 0;
b3b94faa DT	647
f057f6cd SW	648	fail_tune:
f057f6cd SW	649	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
a91ea69f	650	fail_args:
b3b94faa	651	sysfs_remove_group(&sdp->sd_kobj, &args_group);
a91ea69f	652	fail_lockstruct:
b3b94faa	653	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
a91ea69f	654	fail_reg:
197b12d6	655	kobject_put(&sdp->sd_kobj);
a91ea69f	656	fail:
65952fb4	657	fs_err(sdp, "error %d adding sysfs files", error);
b3b94faa DT	658	return error;
	659	}
	660
	661	void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
	662	{
	663	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
	664	sysfs_remove_group(&sdp->sd_kobj, &args_group);
b3b94faa	665	sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
f057f6cd	666	sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
197b12d6	667	kobject_put(&sdp->sd_kobj);
b3b94faa DT	668	}
b3b94faa DT	669
02e3cc70	670
fdd1062e SW	671	static int gfs2_uevent(struct kset kset, struct kobject kobj,
	672	struct kobj_uevent_env *env)
	673	{
	674	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
02e3cc70 SW	675	const u8 *uuid = sdp->sd_sb.sb_uuid;
02e3cc70 SW	676
fdd1062e SW	677	add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
fdd1062e SW	678	add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
02e3cc70 SW	679	if (gfs2_uuid_valid(uuid)) {
	680	add_uevent_var(env, "UUID=%02X%02X%02X%02X-%02X%02X-%02X%02X-"
	681	"%02X%02X-%02X%02X%02X%02X%02X%02X",
	682	uuid[0], uuid[1], uuid[2], uuid[3], uuid[4],
	683	uuid[5], uuid[6], uuid[7], uuid[8], uuid[9],
	684	uuid[10], uuid[11], uuid[12], uuid[13],
	685	uuid[14], uuid[15]);
	686	}
fdd1062e SW	687	return 0;
	688	}
	689
	690	static struct kset_uevent_ops gfs2_uevent_ops = {
	691	.uevent = gfs2_uevent,
	692	};
	693
	694
b3b94faa DT	695	int gfs2_sys_init(void)
b3b94faa DT	696	{
fdd1062e	697	gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
9bec101a GKH	698	if (!gfs2_kset)
	699	return -ENOMEM;
	700	return 0;
b3b94faa DT	701	}
	702
	703	void gfs2_sys_uninit(void)
	704	{
9bec101a	705	kset_unregister(gfs2_kset);
b3b94faa DT	706	}
b3b94faa DT	707