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update 

Signed-off-by: Wenchao Hao <haowenchao@huawei.com>
This commit is contained in:
Wenchao Hao 2023-04-20 17:15:14 +08:00
parent c4dd3f468a
commit 1e969fa88f
1 changed files with 26 additions and 0 deletions
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26
kobject-example.c
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@ -35,6 +35,21 @@ static ssize_t is_zero_show(struct kobject *kobj, struct kobj_attribute *attr,
} }
static struct kobj_attribute is_zero_attribute = __ATTR_RO(is_zero); static struct kobj_attribute is_zero_attribute = __ATTR_RO(is_zero);
static ssize_t is_atomic_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
unsigned long percpu_ptr = READ_ONCE(global_ref.percpu_count_ptr);
return sysfs_emit(buf, "%d\n", percpu_ptr & __PERCPU_REF_ATOMIC);
}
static struct kobj_attribute is_atomic_attribute = __ATTR_RO(is_atomic);
static ssize_t force_atomic_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
return sysfs_emit(buf, "%d\n", global_ref.data->force_atomic);
}
static struct kobj_attribute force_atomic_attribute = __ATTR_RO(force_atomic);
static ssize_t kill_store(struct kobject *kobj, struct kobj_attribute *attr, static ssize_t kill_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count) const char *buf, size_t count)
{ {
@ -51,12 +66,23 @@ static ssize_t resurrect_store(struct kobject *kobj, struct kobj_attribute *attr
} }
static struct kobj_attribute resurrect_attribute = __ATTR_WO(resurrect); static struct kobj_attribute resurrect_attribute = __ATTR_WO(resurrect);
static ssize_t switch_to_percpu_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
percpu_ref_switch_to_percpu(&global_ref);
return count;
}
static struct kobj_attribute switch_to_percpu_attribute = __ATTR_WO(switch_to_percpu);
static struct attribute *attrs[] = { static struct attribute *attrs[] = {
&is_dying_attribute.attr, &is_dying_attribute.attr,
&is_zero_attribute.attr, &is_zero_attribute.attr,
&is_percpu_attribute.attr, &is_percpu_attribute.attr,
&is_atomic_attribute.attr,
&force_atomic_attribute.attr,
&kill_attribute.attr, &kill_attribute.attr,
&resurrect_attribute.attr, &resurrect_attribute.attr,
&switch_to_percpu_attribute.attr,
NULL, NULL,
}; };
static struct attribute_group attr_group = { static struct attribute_group attr_group = {