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/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
#include <linux/module.h>
#include <linux/sysctl.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <linux/bitops.h>
#include <linux/uaccess.h>
#include <linux/utsname.h>
#define DEBUG_SUBSYSTEM S_CLASS
#include "../../include/obd_support.h"
#include "../../include/lprocfs_status.h"
struct static_lustre_uintvalue_attr {
struct {
struct attribute attr;
ssize_t (*show)(struct kobject *kobj, struct attribute *attr,
char *buf);
ssize_t (*store)(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t len);
} u;
int *value;
};
static ssize_t static_uintvalue_show(struct kobject *kobj,
struct attribute *attr,
char *buf)
{
struct static_lustre_uintvalue_attr *lattr = (void *)attr;
return sprintf(buf, "%d\n", *lattr->value);
}
static ssize_t static_uintvalue_store(struct kobject *kobj,
struct attribute *attr,
const char *buffer, size_t count)
{
struct static_lustre_uintvalue_attr *lattr = (void *)attr;
int rc;
unsigned int val;
rc = kstrtouint(buffer, 10, &val);
if (rc)
return rc;
*lattr->value = val;
return count;
}
#define LUSTRE_STATIC_UINT_ATTR(name, value) \
static struct static_lustre_uintvalue_attr lustre_sattr_##name = \
{__ATTR(name, 0644, \
static_uintvalue_show, \
static_uintvalue_store),\
value }
LUSTRE_STATIC_UINT_ATTR(timeout, &obd_timeout);
static ssize_t max_dirty_mb_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
return sprintf(buf, "%ul\n",
obd_max_dirty_pages / (1 << (20 - PAGE_SHIFT)));
}
static ssize_t max_dirty_mb_store(struct kobject *kobj, struct attribute *attr,
const char *buffer, size_t count)
{
int rc;
unsigned long val;
rc = kstrtoul(buffer, 10, &val);
if (rc)
return rc;
val *= 1 << (20 - PAGE_SHIFT); /* convert to pages */
if (val > ((totalram_pages / 10) * 9)) {
/* Somebody wants to assign too much memory to dirty pages */
return -EINVAL;
}
if (val < 4 << (20 - PAGE_SHIFT)) {
/* Less than 4 Mb for dirty cache is also bad */
return -EINVAL;
}
obd_max_dirty_pages = val;
return count;
}
LUSTRE_RW_ATTR(max_dirty_mb);
LUSTRE_STATIC_UINT_ATTR(debug_peer_on_timeout, &obd_debug_peer_on_timeout);
LUSTRE_STATIC_UINT_ATTR(dump_on_timeout, &obd_dump_on_timeout);
LUSTRE_STATIC_UINT_ATTR(dump_on_eviction, &obd_dump_on_eviction);
LUSTRE_STATIC_UINT_ATTR(at_min, &at_min);
LUSTRE_STATIC_UINT_ATTR(at_max, &at_max);
LUSTRE_STATIC_UINT_ATTR(at_extra, &at_extra);
LUSTRE_STATIC_UINT_ATTR(at_early_margin, &at_early_margin);
LUSTRE_STATIC_UINT_ATTR(at_history, &at_history);
static struct attribute *lustre_attrs[] = {
&lustre_sattr_timeout.u.attr,
&lustre_attr_max_dirty_mb.attr,
&lustre_sattr_debug_peer_on_timeout.u.attr,
&lustre_sattr_dump_on_timeout.u.attr,
&lustre_sattr_dump_on_eviction.u.attr,
&lustre_sattr_at_min.u.attr,
&lustre_sattr_at_max.u.attr,
&lustre_sattr_at_extra.u.attr,
&lustre_sattr_at_early_margin.u.attr,
&lustre_sattr_at_history.u.attr,
NULL,
};
static struct attribute_group lustre_attr_group = {
.attrs = lustre_attrs,
};
int obd_sysctl_init(void)
{
return sysfs_create_group(lustre_kobj, &lustre_attr_group);
}
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