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Diffstat (limited to 'mm/damon/sysfs-schemes.c')
-rw-r--r--mm/damon/sysfs-schemes.c123
1 files changed, 122 insertions, 1 deletions
diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c
index 500759d8b20c..f0b5ad7e721d 100644
--- a/mm/damon/sysfs-schemes.c
+++ b/mm/damon/sysfs-schemes.c
@@ -10,17 +10,137 @@
#include "sysfs-common.h"
/*
+ * scheme region directory
+ */
+
+struct damon_sysfs_scheme_region {
+ struct kobject kobj;
+ struct damon_addr_range ar;
+ unsigned int nr_accesses;
+ unsigned int age;
+ struct list_head list;
+};
+
+static struct damon_sysfs_scheme_region *damon_sysfs_scheme_region_alloc(
+ struct damon_region *region)
+{
+ struct damon_sysfs_scheme_region *sysfs_region = kmalloc(
+ sizeof(*sysfs_region), GFP_KERNEL);
+
+ if (!sysfs_region)
+ return NULL;
+ sysfs_region->kobj = (struct kobject){};
+ sysfs_region->ar = region->ar;
+ sysfs_region->nr_accesses = region->nr_accesses;
+ sysfs_region->age = region->age;
+ INIT_LIST_HEAD(&sysfs_region->list);
+ return sysfs_region;
+}
+
+static ssize_t start_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ return sysfs_emit(buf, "%lu\n", region->ar.start);
+}
+
+static ssize_t end_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ return sysfs_emit(buf, "%lu\n", region->ar.end);
+}
+
+static ssize_t nr_accesses_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ return sysfs_emit(buf, "%u\n", region->nr_accesses);
+}
+
+static ssize_t age_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ return sysfs_emit(buf, "%u\n", region->age);
+}
+
+static void damon_sysfs_scheme_region_release(struct kobject *kobj)
+{
+ struct damon_sysfs_scheme_region *region = container_of(kobj,
+ struct damon_sysfs_scheme_region, kobj);
+
+ list_del(&region->list);
+ kfree(region);
+}
+
+static struct kobj_attribute damon_sysfs_scheme_region_start_attr =
+ __ATTR_RO_MODE(start, 0400);
+
+static struct kobj_attribute damon_sysfs_scheme_region_end_attr =
+ __ATTR_RO_MODE(end, 0400);
+
+static struct kobj_attribute damon_sysfs_scheme_region_nr_accesses_attr =
+ __ATTR_RO_MODE(nr_accesses, 0400);
+
+static struct kobj_attribute damon_sysfs_scheme_region_age_attr =
+ __ATTR_RO_MODE(age, 0400);
+
+static struct attribute *damon_sysfs_scheme_region_attrs[] = {
+ &damon_sysfs_scheme_region_start_attr.attr,
+ &damon_sysfs_scheme_region_end_attr.attr,
+ &damon_sysfs_scheme_region_nr_accesses_attr.attr,
+ &damon_sysfs_scheme_region_age_attr.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(damon_sysfs_scheme_region);
+
+static struct kobj_type damon_sysfs_scheme_region_ktype = {
+ .release = damon_sysfs_scheme_region_release,
+ .sysfs_ops = &kobj_sysfs_ops,
+ .default_groups = damon_sysfs_scheme_region_groups,
+};
+
+/*
* scheme regions directory
*/
struct damon_sysfs_scheme_regions {
struct kobject kobj;
+ struct list_head regions_list;
+ int nr_regions;
};
static struct damon_sysfs_scheme_regions *
damon_sysfs_scheme_regions_alloc(void)
{
- return kzalloc(sizeof(struct damon_sysfs_scheme_regions), GFP_KERNEL);
+ struct damon_sysfs_scheme_regions *regions = kmalloc(sizeof(*regions),
+ GFP_KERNEL);
+
+ regions->kobj = (struct kobject){};
+ INIT_LIST_HEAD(&regions->regions_list);
+ regions->nr_regions = 0;
+ return regions;
+}
+
+static void damon_sysfs_scheme_regions_rm_dirs(
+ struct damon_sysfs_scheme_regions *regions)
+{
+ struct damon_sysfs_scheme_region *r, *next;
+
+ list_for_each_entry_safe(r, next, &regions->regions_list, list) {
+ /* release function deletes it from the list */
+ kobject_put(&r->kobj);
+ regions->nr_regions--;
+ }
}
static void damon_sysfs_scheme_regions_release(struct kobject *kobj)
@@ -837,6 +957,7 @@ static void damon_sysfs_scheme_rm_dirs(struct damon_sysfs_scheme *scheme)
kobject_put(&scheme->quotas->kobj);
kobject_put(&scheme->watermarks->kobj);
kobject_put(&scheme->stats->kobj);
+ damon_sysfs_scheme_regions_rm_dirs(scheme->tried_regions);
kobject_put(&scheme->tried_regions->kobj);
}