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// SPDX-License-Identifier: GPL-2.0
/*
* Common Primitives for DAMON Sysfs Interface
*
* Author: SeongJae Park <sj@kernel.org>
*/
#include <linux/slab.h>
#include "sysfs-common.h"
DEFINE_MUTEX(damon_sysfs_lock);
/*
* unsigned long range directory
*/
struct damon_sysfs_ul_range *damon_sysfs_ul_range_alloc(
unsigned long min,
unsigned long max)
{
struct damon_sysfs_ul_range *range = kmalloc(sizeof(*range),
GFP_KERNEL);
if (!range)
return NULL;
range->kobj = (struct kobject){};
range->min = min;
range->max = max;
return range;
}
static ssize_t min_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct damon_sysfs_ul_range *range = container_of(kobj,
struct damon_sysfs_ul_range, kobj);
return sysfs_emit(buf, "%lu\n", range->min);
}
static ssize_t min_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct damon_sysfs_ul_range *range = container_of(kobj,
struct damon_sysfs_ul_range, kobj);
unsigned long min;
int err;
err = kstrtoul(buf, 0, &min);
if (err)
return err;
range->min = min;
return count;
}
static ssize_t max_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct damon_sysfs_ul_range *range = container_of(kobj,
struct damon_sysfs_ul_range, kobj);
return sysfs_emit(buf, "%lu\n", range->max);
}
static ssize_t max_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct damon_sysfs_ul_range *range = container_of(kobj,
struct damon_sysfs_ul_range, kobj);
unsigned long max;
int err;
err = kstrtoul(buf, 0, &max);
if (err)
return err;
range->max = max;
return count;
}
void damon_sysfs_ul_range_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_ul_range, kobj));
}
static struct kobj_attribute damon_sysfs_ul_range_min_attr =
__ATTR_RW_MODE(min, 0600);
static struct kobj_attribute damon_sysfs_ul_range_max_attr =
__ATTR_RW_MODE(max, 0600);
static struct attribute *damon_sysfs_ul_range_attrs[] = {
&damon_sysfs_ul_range_min_attr.attr,
&damon_sysfs_ul_range_max_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_ul_range);
const struct kobj_type damon_sysfs_ul_range_ktype = {
.release = damon_sysfs_ul_range_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_ul_range_groups,
};
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