#include <linux/slab.h>
#include <linux/numa.h>
#include "sysfs-common.h"
struct damon_sysfs_scheme_region {
struct kobject kobj;
struct damon_addr_range ar;
unsigned int nr_accesses;
unsigned int age;
unsigned long sz_filter_passed;
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_obj(*sysfs_region);
if (!sysfs_region)
return NULL;
sysfs_region->kobj = (struct kobject){};
sysfs_region->ar = region->ar;
sysfs_region->nr_accesses = region->nr_accesses_bp / 10000;
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 ssize_t sz_filter_passed_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->sz_filter_passed);
}
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(®ion->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 kobj_attribute damon_sysfs_scheme_region_sz_filter_passed_attr =
__ATTR_RO_MODE(sz_filter_passed, 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,
&damon_sysfs_scheme_region_sz_filter_passed_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_scheme_region);
static const 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,
};
struct damon_sysfs_scheme_regions {
struct kobject kobj;
struct list_head regions_list;
int nr_regions;
unsigned long total_bytes;
};
static struct damon_sysfs_scheme_regions *
damon_sysfs_scheme_regions_alloc(void)
{
struct damon_sysfs_scheme_regions *regions = kmalloc_obj(*regions);
if (!regions)
return NULL;
regions->kobj = (struct kobject){};
INIT_LIST_HEAD(®ions->regions_list);
regions->nr_regions = 0;
regions->total_bytes = 0;
return regions;
}
static ssize_t total_bytes_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_regions *regions = container_of(kobj,
struct damon_sysfs_scheme_regions, kobj);
return sysfs_emit(buf, "%lu\n", regions->total_bytes);
}
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, ®ions->regions_list, list) {
kobject_put(&r->kobj);
regions->nr_regions--;
}
}
static void damon_sysfs_scheme_regions_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_scheme_regions, kobj));
}
static struct kobj_attribute damon_sysfs_scheme_regions_total_bytes_attr =
__ATTR_RO_MODE(total_bytes, 0400);
static struct attribute *damon_sysfs_scheme_regions_attrs[] = {
&damon_sysfs_scheme_regions_total_bytes_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_scheme_regions);
static const struct kobj_type damon_sysfs_scheme_regions_ktype = {
.release = damon_sysfs_scheme_regions_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_scheme_regions_groups,
};
struct damon_sysfs_stats {
struct kobject kobj;
unsigned long nr_tried;
unsigned long sz_tried;
unsigned long nr_applied;
unsigned long sz_applied;
unsigned long sz_ops_filter_passed;
unsigned long qt_exceeds;
unsigned long nr_snapshots;
unsigned long max_nr_snapshots;
};
static struct damon_sysfs_stats *damon_sysfs_stats_alloc(void)
{
return kzalloc_obj(struct damon_sysfs_stats);
}
static ssize_t nr_tried_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
return sysfs_emit(buf, "%lu\n", stats->nr_tried);
}
static ssize_t sz_tried_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
return sysfs_emit(buf, "%lu\n", stats->sz_tried);
}
static ssize_t nr_applied_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
return sysfs_emit(buf, "%lu\n", stats->nr_applied);
}
static ssize_t sz_applied_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
return sysfs_emit(buf, "%lu\n", stats->sz_applied);
}
static ssize_t sz_ops_filter_passed_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
return sysfs_emit(buf, "%lu\n", stats->sz_ops_filter_passed);
}
static ssize_t qt_exceeds_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
return sysfs_emit(buf, "%lu\n", stats->qt_exceeds);
}
static ssize_t nr_snapshots_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
return sysfs_emit(buf, "%lu\n", stats->nr_snapshots);
}
static ssize_t max_nr_snapshots_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
return sysfs_emit(buf, "%lu\n", stats->max_nr_snapshots);
}
static ssize_t max_nr_snapshots_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
unsigned long max_nr_snapshots, err = kstrtoul(buf, 0, &max_nr_snapshots);
if (err)
return err;
stats->max_nr_snapshots = max_nr_snapshots;
return count;
}
static void damon_sysfs_stats_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_stats, kobj));
}
static struct kobj_attribute damon_sysfs_stats_nr_tried_attr =
__ATTR_RO_MODE(nr_tried, 0400);
static struct kobj_attribute damon_sysfs_stats_sz_tried_attr =
__ATTR_RO_MODE(sz_tried, 0400);
static struct kobj_attribute damon_sysfs_stats_nr_applied_attr =
__ATTR_RO_MODE(nr_applied, 0400);
static struct kobj_attribute damon_sysfs_stats_sz_applied_attr =
__ATTR_RO_MODE(sz_applied, 0400);
static struct kobj_attribute damon_sysfs_stats_sz_ops_filter_passed_attr =
__ATTR_RO_MODE(sz_ops_filter_passed, 0400);
static struct kobj_attribute damon_sysfs_stats_qt_exceeds_attr =
__ATTR_RO_MODE(qt_exceeds, 0400);
static struct kobj_attribute damon_sysfs_stats_nr_snapshots_attr =
__ATTR_RO_MODE(nr_snapshots, 0400);
static struct kobj_attribute damon_sysfs_stats_max_nr_snapshots_attr =
__ATTR_RW_MODE(max_nr_snapshots, 0600);
static struct attribute *damon_sysfs_stats_attrs[] = {
&damon_sysfs_stats_nr_tried_attr.attr,
&damon_sysfs_stats_sz_tried_attr.attr,
&damon_sysfs_stats_nr_applied_attr.attr,
&damon_sysfs_stats_sz_applied_attr.attr,
&damon_sysfs_stats_sz_ops_filter_passed_attr.attr,
&damon_sysfs_stats_qt_exceeds_attr.attr,
&damon_sysfs_stats_nr_snapshots_attr.attr,
&damon_sysfs_stats_max_nr_snapshots_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_stats);
static const struct kobj_type damon_sysfs_stats_ktype = {
.release = damon_sysfs_stats_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_stats_groups,
};
enum damos_sysfs_filter_handle_layer {
DAMOS_SYSFS_FILTER_HANDLE_LAYER_CORE,
DAMOS_SYSFS_FILTER_HANDLE_LAYER_OPS,
DAMOS_SYSFS_FILTER_HANDLE_LAYER_BOTH,
};
struct damon_sysfs_scheme_filter {
struct kobject kobj;
enum damos_sysfs_filter_handle_layer handle_layer;
enum damos_filter_type type;
bool matching;
bool allow;
char *memcg_path;
struct damon_addr_range addr_range;
struct damon_size_range sz_range;
int target_idx;
};
static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(
enum damos_sysfs_filter_handle_layer layer)
{
struct damon_sysfs_scheme_filter *filter;
filter = kzalloc_obj(struct damon_sysfs_scheme_filter);
if (filter)
filter->handle_layer = layer;
return filter;
}
struct damos_sysfs_filter_type_name {
enum damos_filter_type type;
char *name;
};
static const struct damos_sysfs_filter_type_name
damos_sysfs_filter_type_names[] = {
{
.type = DAMOS_FILTER_TYPE_ANON,
.name = "anon",
},
{
.type = DAMOS_FILTER_TYPE_ACTIVE,
.name = "active",
},
{
.type = DAMOS_FILTER_TYPE_MEMCG,
.name = "memcg",
},
{
.type = DAMOS_FILTER_TYPE_YOUNG,
.name = "young",
},
{
.type = DAMOS_FILTER_TYPE_HUGEPAGE_SIZE,
.name = "hugepage_size",
},
{
.type = DAMOS_FILTER_TYPE_UNMAPPED,
.name = "unmapped",
},
{
.type = DAMOS_FILTER_TYPE_ADDR,
.name = "addr",
},
{
.type = DAMOS_FILTER_TYPE_TARGET,
.name = "target",
},
};
static ssize_t type_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
int i;
for (i = 0; i < ARRAY_SIZE(damos_sysfs_filter_type_names); i++) {
const struct damos_sysfs_filter_type_name *type_name;
type_name = &damos_sysfs_filter_type_names[i];
if (type_name->type == filter->type)
return sysfs_emit(buf, "%s\n", type_name->name);
}
return -EINVAL;
}
static bool damos_sysfs_scheme_filter_valid_type(
enum damos_sysfs_filter_handle_layer layer,
enum damos_filter_type type)
{
switch (layer) {
case DAMOS_SYSFS_FILTER_HANDLE_LAYER_BOTH:
return true;
case DAMOS_SYSFS_FILTER_HANDLE_LAYER_CORE:
return !damos_filter_for_ops(type);
case DAMOS_SYSFS_FILTER_HANDLE_LAYER_OPS:
return damos_filter_for_ops(type);
default:
break;
}
return false;
}
static ssize_t type_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
ssize_t ret = -EINVAL;
int i;
for (i = 0; i < ARRAY_SIZE(damos_sysfs_filter_type_names); i++) {
const struct damos_sysfs_filter_type_name *type_name;
type_name = &damos_sysfs_filter_type_names[i];
if (sysfs_streq(buf, type_name->name)) {
if (!damos_sysfs_scheme_filter_valid_type(
filter->handle_layer,
type_name->type))
break;
filter->type = type_name->type;
ret = count;
break;
}
}
return ret;
}
static ssize_t matching_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%c\n", filter->matching ? 'Y' : 'N');
}
static ssize_t matching_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
bool matching;
int err = kstrtobool(buf, &matching);
if (err)
return err;
filter->matching = matching;
return count;
}
static ssize_t allow_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%c\n", filter->allow ? 'Y' : 'N');
}
static ssize_t allow_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
bool allow;
int err = kstrtobool(buf, &allow);
if (err)
return err;
filter->allow = allow;
return count;
}
static ssize_t memcg_path_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%s\n",
filter->memcg_path ? filter->memcg_path : "");
}
static ssize_t memcg_path_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
char *path = kmalloc_array(size_add(count, 1), sizeof(*path),
GFP_KERNEL);
if (!path)
return -ENOMEM;
strscpy(path, buf, count + 1);
kfree(filter->memcg_path);
filter->memcg_path = path;
return count;
}
static ssize_t addr_start_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%lu\n", filter->addr_range.start);
}
static ssize_t addr_start_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
int err = kstrtoul(buf, 0, &filter->addr_range.start);
return err ? err : count;
}
static ssize_t addr_end_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%lu\n", filter->addr_range.end);
}
static ssize_t addr_end_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
int err = kstrtoul(buf, 0, &filter->addr_range.end);
return err ? err : count;
}
static ssize_t min_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%lu\n", filter->sz_range.min);
}
static ssize_t min_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
int err = kstrtoul(buf, 0, &filter->sz_range.min);
return err ? err : count;
}
static ssize_t max_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%lu\n", filter->sz_range.max);
}
static ssize_t max_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
int err = kstrtoul(buf, 0, &filter->sz_range.max);
return err ? err : count;
}
static ssize_t damon_target_idx_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%d\n", filter->target_idx);
}
static ssize_t damon_target_idx_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
int err = kstrtoint(buf, 0, &filter->target_idx);
return err ? err : count;
}
static void damon_sysfs_scheme_filter_release(struct kobject *kobj)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
kfree(filter->memcg_path);
kfree(filter);
}
static struct kobj_attribute damon_sysfs_scheme_filter_type_attr =
__ATTR_RW_MODE(type, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_matching_attr =
__ATTR_RW_MODE(matching, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_allow_attr =
__ATTR_RW_MODE(allow, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_memcg_path_attr =
__ATTR_RW_MODE(memcg_path, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_addr_start_attr =
__ATTR_RW_MODE(addr_start, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_addr_end_attr =
__ATTR_RW_MODE(addr_end, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_min_attr =
__ATTR_RW_MODE(min, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_max_attr =
__ATTR_RW_MODE(max, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_damon_target_idx_attr =
__ATTR_RW_MODE(damon_target_idx, 0600);
static struct attribute *damon_sysfs_scheme_filter_attrs[] = {
&damon_sysfs_scheme_filter_type_attr.attr,
&damon_sysfs_scheme_filter_matching_attr.attr,
&damon_sysfs_scheme_filter_allow_attr.attr,
&damon_sysfs_scheme_filter_memcg_path_attr.attr,
&damon_sysfs_scheme_filter_addr_start_attr.attr,
&damon_sysfs_scheme_filter_addr_end_attr.attr,
&damon_sysfs_scheme_filter_min_attr.attr,
&damon_sysfs_scheme_filter_max_attr.attr,
&damon_sysfs_scheme_filter_damon_target_idx_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_scheme_filter);
static const struct kobj_type damon_sysfs_scheme_filter_ktype = {
.release = damon_sysfs_scheme_filter_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_scheme_filter_groups,
};
struct damon_sysfs_scheme_filters {
struct kobject kobj;
enum damos_sysfs_filter_handle_layer handle_layer;
struct damon_sysfs_scheme_filter **filters_arr;
int nr;
};
static struct damon_sysfs_scheme_filters *
damon_sysfs_scheme_filters_alloc(enum damos_sysfs_filter_handle_layer layer)
{
struct damon_sysfs_scheme_filters *filters;
filters = kzalloc_obj(struct damon_sysfs_scheme_filters);
if (filters)
filters->handle_layer = layer;
return filters;
}
static void damon_sysfs_scheme_filters_rm_dirs(
struct damon_sysfs_scheme_filters *filters)
{
struct damon_sysfs_scheme_filter **filters_arr = filters->filters_arr;
int i;
for (i = 0; i < filters->nr; i++)
kobject_put(&filters_arr[i]->kobj);
filters->nr = 0;
kfree(filters_arr);
filters->filters_arr = NULL;
}
static int damon_sysfs_scheme_filters_add_dirs(
struct damon_sysfs_scheme_filters *filters, int nr_filters)
{
struct damon_sysfs_scheme_filter **filters_arr, *filter;
int err, i;
damon_sysfs_scheme_filters_rm_dirs(filters);
if (!nr_filters)
return 0;
filters_arr = kmalloc_objs(*filters_arr, nr_filters,
GFP_KERNEL | __GFP_NOWARN);
if (!filters_arr)
return -ENOMEM;
filters->filters_arr = filters_arr;
for (i = 0; i < nr_filters; i++) {
filter = damon_sysfs_scheme_filter_alloc(
filters->handle_layer);
if (!filter) {
damon_sysfs_scheme_filters_rm_dirs(filters);
return -ENOMEM;
}
err = kobject_init_and_add(&filter->kobj,
&damon_sysfs_scheme_filter_ktype,
&filters->kobj, "%d", i);
if (err) {
kobject_put(&filter->kobj);
damon_sysfs_scheme_filters_rm_dirs(filters);
return err;
}
filters_arr[i] = filter;
filters->nr++;
}
return 0;
}
static ssize_t nr_filters_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filters *filters = container_of(kobj,
struct damon_sysfs_scheme_filters, kobj);
return sysfs_emit(buf, "%d\n", filters->nr);
}
static ssize_t nr_filters_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filters *filters;
int nr, err = kstrtoint(buf, 0, &nr);
if (err)
return err;
if (nr < 0)
return -EINVAL;
filters = container_of(kobj, struct damon_sysfs_scheme_filters, kobj);
if (!mutex_trylock(&damon_sysfs_lock))
return -EBUSY;
err = damon_sysfs_scheme_filters_add_dirs(filters, nr);
mutex_unlock(&damon_sysfs_lock);
if (err)
return err;
return count;
}
static void damon_sysfs_scheme_filters_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_scheme_filters, kobj));
}
static struct kobj_attribute damon_sysfs_scheme_filters_nr_attr =
__ATTR_RW_MODE(nr_filters, 0600);
static struct attribute *damon_sysfs_scheme_filters_attrs[] = {
&damon_sysfs_scheme_filters_nr_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_scheme_filters);
static const struct kobj_type damon_sysfs_scheme_filters_ktype = {
.release = damon_sysfs_scheme_filters_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_scheme_filters_groups,
};
struct damon_sysfs_watermarks {
struct kobject kobj;
enum damos_wmark_metric metric;
unsigned long interval_us;
unsigned long high;
unsigned long mid;
unsigned long low;
};
static struct damon_sysfs_watermarks *damon_sysfs_watermarks_alloc(
enum damos_wmark_metric metric, unsigned long interval_us,
unsigned long high, unsigned long mid, unsigned long low)
{
struct damon_sysfs_watermarks *watermarks = kmalloc_obj(*watermarks);
if (!watermarks)
return NULL;
watermarks->kobj = (struct kobject){};
watermarks->metric = metric;
watermarks->interval_us = interval_us;
watermarks->high = high;
watermarks->mid = mid;
watermarks->low = low;
return watermarks;
}
struct damos_sysfs_wmark_metric_name {
enum damos_wmark_metric metric;
char *name;
};
static const struct damos_sysfs_wmark_metric_name
damos_sysfs_wmark_metric_names[] = {
{
.metric = DAMOS_WMARK_NONE,
.name = "none",
},
{
.metric = DAMOS_WMARK_FREE_MEM_RATE,
.name = "free_mem_rate",
},
};
static ssize_t metric_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
int i;
for (i = 0; i < ARRAY_SIZE(damos_sysfs_wmark_metric_names); i++) {
const struct damos_sysfs_wmark_metric_name *metric_name;
metric_name = &damos_sysfs_wmark_metric_names[i];
if (metric_name->metric == watermarks->metric)
return sysfs_emit(buf, "%s\n", metric_name->name);
}
return -EINVAL;
}
static ssize_t metric_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
int i;
for (i = 0; i < ARRAY_SIZE(damos_sysfs_wmark_metric_names); i++) {
const struct damos_sysfs_wmark_metric_name *metric_name;
metric_name = &damos_sysfs_wmark_metric_names[i];
if (sysfs_streq(buf, metric_name->name)) {
watermarks->metric = metric_name->metric;
return count;
}
}
return -EINVAL;
}
static ssize_t interval_us_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
return sysfs_emit(buf, "%lu\n", watermarks->interval_us);
}
static ssize_t interval_us_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
int err = kstrtoul(buf, 0, &watermarks->interval_us);
return err ? err : count;
}
static ssize_t high_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
return sysfs_emit(buf, "%lu\n", watermarks->high);
}
static ssize_t high_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
int err = kstrtoul(buf, 0, &watermarks->high);
return err ? err : count;
}
static ssize_t mid_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
return sysfs_emit(buf, "%lu\n", watermarks->mid);
}
static ssize_t mid_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
int err = kstrtoul(buf, 0, &watermarks->mid);
return err ? err : count;
}
static ssize_t low_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
return sysfs_emit(buf, "%lu\n", watermarks->low);
}
static ssize_t low_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_watermarks *watermarks = container_of(kobj,
struct damon_sysfs_watermarks, kobj);
int err = kstrtoul(buf, 0, &watermarks->low);
return err ? err : count;
}
static void damon_sysfs_watermarks_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_watermarks, kobj));
}
static struct kobj_attribute damon_sysfs_watermarks_metric_attr =
__ATTR_RW_MODE(metric, 0600);
static struct kobj_attribute damon_sysfs_watermarks_interval_us_attr =
__ATTR_RW_MODE(interval_us, 0600);
static struct kobj_attribute damon_sysfs_watermarks_high_attr =
__ATTR_RW_MODE(high, 0600);
static struct kobj_attribute damon_sysfs_watermarks_mid_attr =
__ATTR_RW_MODE(mid, 0600);
static struct kobj_attribute damon_sysfs_watermarks_low_attr =
__ATTR_RW_MODE(low, 0600);
static struct attribute *damon_sysfs_watermarks_attrs[] = {
&damon_sysfs_watermarks_metric_attr.attr,
&damon_sysfs_watermarks_interval_us_attr.attr,
&damon_sysfs_watermarks_high_attr.attr,
&damon_sysfs_watermarks_mid_attr.attr,
&damon_sysfs_watermarks_low_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_watermarks);
static const struct kobj_type damon_sysfs_watermarks_ktype = {
.release = damon_sysfs_watermarks_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_watermarks_groups,
};
struct damos_sysfs_quota_goal {
struct kobject kobj;
enum damos_quota_goal_metric metric;
unsigned long target_value;
unsigned long current_value;
int nid;
char *path;
};
static struct damos_sysfs_quota_goal *damos_sysfs_quota_goal_alloc(void)
{
return kzalloc_obj(struct damos_sysfs_quota_goal);
}
struct damos_sysfs_qgoal_metric_name {
enum damos_quota_goal_metric metric;
char *name;
};
static
struct damos_sysfs_qgoal_metric_name damos_sysfs_qgoal_metric_names[] = {
{
.metric = DAMOS_QUOTA_USER_INPUT,
.name = "user_input",
},
{
.metric = DAMOS_QUOTA_SOME_MEM_PSI_US,
.name = "some_mem_psi_us",
},
{
.metric = DAMOS_QUOTA_NODE_MEM_USED_BP,
.name = "node_mem_used_bp",
},
{
.metric = DAMOS_QUOTA_NODE_MEM_FREE_BP,
.name = "node_mem_free_bp",
},
{
.metric = DAMOS_QUOTA_NODE_MEMCG_USED_BP,
.name = "node_memcg_used_bp",
},
{
.metric = DAMOS_QUOTA_NODE_MEMCG_FREE_BP,
.name = "node_memcg_free_bp",
},
{
.metric = DAMOS_QUOTA_ACTIVE_MEM_BP,
.name = "active_mem_bp",
},
{
.metric = DAMOS_QUOTA_INACTIVE_MEM_BP,
.name = "inactive_mem_bp",
},
};
static ssize_t target_metric_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj,
struct damos_sysfs_quota_goal, kobj);
int i;
for (i = 0; i < ARRAY_SIZE(damos_sysfs_qgoal_metric_names); i++) {
struct damos_sysfs_qgoal_metric_name *metric_name;
metric_name = &damos_sysfs_qgoal_metric_names[i];
if (metric_name->metric == goal->metric)
return sysfs_emit(buf, "%s\n", metric_name->name);
}
return -EINVAL;
}
static ssize_t target_metric_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj,
struct damos_sysfs_quota_goal, kobj);
int i;
for (i = 0; i < ARRAY_SIZE(damos_sysfs_qgoal_metric_names); i++) {
struct damos_sysfs_qgoal_metric_name *metric_name;
metric_name = &damos_sysfs_qgoal_metric_names[i];
if (sysfs_streq(buf, metric_name->name)) {
goal->metric = metric_name->metric;
return count;
}
}
return -EINVAL;
}
static ssize_t target_value_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj, struct
damos_sysfs_quota_goal, kobj);
return sysfs_emit(buf, "%lu\n", goal->target_value);
}
static ssize_t target_value_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj, struct
damos_sysfs_quota_goal, kobj);
int err = kstrtoul(buf, 0, &goal->target_value);
return err ? err : count;
}
static ssize_t current_value_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj, struct
damos_sysfs_quota_goal, kobj);
return sysfs_emit(buf, "%lu\n", goal->current_value);
}
static ssize_t current_value_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj, struct
damos_sysfs_quota_goal, kobj);
int err = kstrtoul(buf, 0, &goal->current_value);
return err ? err : count;
}
static ssize_t nid_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj, struct
damos_sysfs_quota_goal, kobj);
return sysfs_emit(buf, "%d\n", goal->nid);
}
static ssize_t nid_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj, struct
damos_sysfs_quota_goal, kobj);
int err = kstrtoint(buf, 0, &goal->nid);
return err ? err : count;
}
static ssize_t path_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj,
struct damos_sysfs_quota_goal, kobj);
return sysfs_emit(buf, "%s\n", goal->path ? goal->path : "");
}
static ssize_t path_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj,
struct damos_sysfs_quota_goal, kobj);
char *path = kmalloc_array(size_add(count, 1), sizeof(*path),
GFP_KERNEL);
if (!path)
return -ENOMEM;
strscpy(path, buf, count + 1);
kfree(goal->path);
goal->path = path;
return count;
}
static void damos_sysfs_quota_goal_release(struct kobject *kobj)
{
struct damos_sysfs_quota_goal *goal = container_of(kobj,
struct damos_sysfs_quota_goal, kobj);
kfree(goal->path);
kfree(goal);
}
static struct kobj_attribute damos_sysfs_quota_goal_target_metric_attr =
__ATTR_RW_MODE(target_metric, 0600);
static struct kobj_attribute damos_sysfs_quota_goal_target_value_attr =
__ATTR_RW_MODE(target_value, 0600);
static struct kobj_attribute damos_sysfs_quota_goal_current_value_attr =
__ATTR_RW_MODE(current_value, 0600);
static struct kobj_attribute damos_sysfs_quota_goal_nid_attr =
__ATTR_RW_MODE(nid, 0600);
static struct kobj_attribute damos_sysfs_quota_goal_path_attr =
__ATTR_RW_MODE(path, 0600);
static struct attribute *damos_sysfs_quota_goal_attrs[] = {
&damos_sysfs_quota_goal_target_metric_attr.attr,
&damos_sysfs_quota_goal_target_value_attr.attr,
&damos_sysfs_quota_goal_current_value_attr.attr,
&damos_sysfs_quota_goal_nid_attr.attr,
&damos_sysfs_quota_goal_path_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damos_sysfs_quota_goal);
static const struct kobj_type damos_sysfs_quota_goal_ktype = {
.release = damos_sysfs_quota_goal_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damos_sysfs_quota_goal_groups,
};
struct damos_sysfs_quota_goals {
struct kobject kobj;
struct damos_sysfs_quota_goal **goals_arr;
int nr;
};
static struct damos_sysfs_quota_goals *damos_sysfs_quota_goals_alloc(void)
{
return kzalloc_obj(struct damos_sysfs_quota_goals);
}
static void damos_sysfs_quota_goals_rm_dirs(
struct damos_sysfs_quota_goals *goals)
{
struct damos_sysfs_quota_goal **goals_arr = goals->goals_arr;
int i;
for (i = 0; i < goals->nr; i++)
kobject_put(&goals_arr[i]->kobj);
goals->nr = 0;
kfree(goals_arr);
goals->goals_arr = NULL;
}
static int damos_sysfs_quota_goals_add_dirs(
struct damos_sysfs_quota_goals *goals, int nr_goals)
{
struct damos_sysfs_quota_goal **goals_arr, *goal;
int err, i;
damos_sysfs_quota_goals_rm_dirs(goals);
if (!nr_goals)
return 0;
goals_arr = kmalloc_objs(*goals_arr, nr_goals,
GFP_KERNEL | __GFP_NOWARN);
if (!goals_arr)
return -ENOMEM;
goals->goals_arr = goals_arr;
for (i = 0; i < nr_goals; i++) {
goal = damos_sysfs_quota_goal_alloc();
if (!goal) {
damos_sysfs_quota_goals_rm_dirs(goals);
return -ENOMEM;
}
err = kobject_init_and_add(&goal->kobj,
&damos_sysfs_quota_goal_ktype, &goals->kobj,
"%d", i);
if (err) {
kobject_put(&goal->kobj);
damos_sysfs_quota_goals_rm_dirs(goals);
return err;
}
goals_arr[i] = goal;
goals->nr++;
}
return 0;
}
static ssize_t nr_goals_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damos_sysfs_quota_goals *goals = container_of(kobj,
struct damos_sysfs_quota_goals, kobj);
return sysfs_emit(buf, "%d\n", goals->nr);
}
static ssize_t nr_goals_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damos_sysfs_quota_goals *goals;
int nr, err = kstrtoint(buf, 0, &nr);
if (err)
return err;
if (nr < 0)
return -EINVAL;
goals = container_of(kobj, struct damos_sysfs_quota_goals, kobj);
if (!mutex_trylock(&damon_sysfs_lock))
return -EBUSY;
err = damos_sysfs_quota_goals_add_dirs(goals, nr);
mutex_unlock(&damon_sysfs_lock);
if (err)
return err;
return count;
}
static void damos_sysfs_quota_goals_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damos_sysfs_quota_goals, kobj));
}
static struct kobj_attribute damos_sysfs_quota_goals_nr_attr =
__ATTR_RW_MODE(nr_goals, 0600);
static struct attribute *damos_sysfs_quota_goals_attrs[] = {
&damos_sysfs_quota_goals_nr_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damos_sysfs_quota_goals);
static const struct kobj_type damos_sysfs_quota_goals_ktype = {
.release = damos_sysfs_quota_goals_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damos_sysfs_quota_goals_groups,
};
struct damon_sysfs_weights {
struct kobject kobj;
unsigned int sz;
unsigned int nr_accesses;
unsigned int age;
};
static struct damon_sysfs_weights *damon_sysfs_weights_alloc(unsigned int sz,
unsigned int nr_accesses, unsigned int age)
{
struct damon_sysfs_weights *weights = kmalloc_obj(*weights);
if (!weights)
return NULL;
weights->kobj = (struct kobject){};
weights->sz = sz;
weights->nr_accesses = nr_accesses;
weights->age = age;
return weights;
}
static ssize_t sz_permil_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_weights *weights = container_of(kobj,
struct damon_sysfs_weights, kobj);
return sysfs_emit(buf, "%u\n", weights->sz);
}
static ssize_t sz_permil_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_weights *weights = container_of(kobj,
struct damon_sysfs_weights, kobj);
int err = kstrtouint(buf, 0, &weights->sz);
return err ? err : count;
}
static ssize_t nr_accesses_permil_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_weights *weights = container_of(kobj,
struct damon_sysfs_weights, kobj);
return sysfs_emit(buf, "%u\n", weights->nr_accesses);
}
static ssize_t nr_accesses_permil_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_weights *weights = container_of(kobj,
struct damon_sysfs_weights, kobj);
int err = kstrtouint(buf, 0, &weights->nr_accesses);
return err ? err : count;
}
static ssize_t age_permil_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_weights *weights = container_of(kobj,
struct damon_sysfs_weights, kobj);
return sysfs_emit(buf, "%u\n", weights->age);
}
static ssize_t age_permil_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_weights *weights = container_of(kobj,
struct damon_sysfs_weights, kobj);
int err = kstrtouint(buf, 0, &weights->age);
return err ? err : count;
}
static void damon_sysfs_weights_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_weights, kobj));
}
static struct kobj_attribute damon_sysfs_weights_sz_attr =
__ATTR_RW_MODE(sz_permil, 0600);
static struct kobj_attribute damon_sysfs_weights_nr_accesses_attr =
__ATTR_RW_MODE(nr_accesses_permil, 0600);
static struct kobj_attribute damon_sysfs_weights_age_attr =
__ATTR_RW_MODE(age_permil, 0600);
static struct attribute *damon_sysfs_weights_attrs[] = {
&damon_sysfs_weights_sz_attr.attr,
&damon_sysfs_weights_nr_accesses_attr.attr,
&damon_sysfs_weights_age_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_weights);
static const struct kobj_type damon_sysfs_weights_ktype = {
.release = damon_sysfs_weights_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_weights_groups,
};
struct damon_sysfs_quotas {
struct kobject kobj;
struct damon_sysfs_weights *weights;
struct damos_sysfs_quota_goals *goals;
unsigned long ms;
unsigned long sz;
unsigned long reset_interval_ms;
unsigned long effective_sz;
};
static struct damon_sysfs_quotas *damon_sysfs_quotas_alloc(void)
{
return kzalloc_obj(struct damon_sysfs_quotas);
}
static int damon_sysfs_quotas_add_dirs(struct damon_sysfs_quotas *quotas)
{
struct damon_sysfs_weights *weights;
struct damos_sysfs_quota_goals *goals;
int err;
weights = damon_sysfs_weights_alloc(0, 0, 0);
if (!weights)
return -ENOMEM;
err = kobject_init_and_add(&weights->kobj, &damon_sysfs_weights_ktype,
"as->kobj, "weights");
if (err) {
kobject_put(&weights->kobj);
return err;
}
quotas->weights = weights;
goals = damos_sysfs_quota_goals_alloc();
if (!goals) {
kobject_put(&weights->kobj);
return -ENOMEM;
}
err = kobject_init_and_add(&goals->kobj,
&damos_sysfs_quota_goals_ktype, "as->kobj,
"goals");
if (err) {
kobject_put(&weights->kobj);
kobject_put(&goals->kobj);
} else {
quotas->goals = goals;
}
return err;
}
static void damon_sysfs_quotas_rm_dirs(struct damon_sysfs_quotas *quotas)
{
kobject_put("as->weights->kobj);
damos_sysfs_quota_goals_rm_dirs(quotas->goals);
kobject_put("as->goals->kobj);
}
static ssize_t ms_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct damon_sysfs_quotas *quotas = container_of(kobj,
struct damon_sysfs_quotas, kobj);
return sysfs_emit(buf, "%lu\n", quotas->ms);
}
static ssize_t ms_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct damon_sysfs_quotas *quotas = container_of(kobj,
struct damon_sysfs_quotas, kobj);
int err = kstrtoul(buf, 0, "as->ms);
if (err)
return -EINVAL;
return count;
}
static ssize_t bytes_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct damon_sysfs_quotas *quotas = container_of(kobj,
struct damon_sysfs_quotas, kobj);
return sysfs_emit(buf, "%lu\n", quotas->sz);
}
static ssize_t bytes_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_quotas *quotas = container_of(kobj,
struct damon_sysfs_quotas, kobj);
int err = kstrtoul(buf, 0, "as->sz);
if (err)
return -EINVAL;
return count;
}
static ssize_t reset_interval_ms_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_quotas *quotas = container_of(kobj,
struct damon_sysfs_quotas, kobj);
return sysfs_emit(buf, "%lu\n", quotas->reset_interval_ms);
}
static ssize_t reset_interval_ms_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_quotas *quotas = container_of(kobj,
struct damon_sysfs_quotas, kobj);
int err = kstrtoul(buf, 0, "as->reset_interval_ms);
if (err)
return -EINVAL;
return count;
}
static ssize_t effective_bytes_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_quotas *quotas = container_of(kobj,
struct damon_sysfs_quotas, kobj);
return sysfs_emit(buf, "%lu\n", quotas->effective_sz);
}
static void damon_sysfs_quotas_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_quotas, kobj));
}
static struct kobj_attribute damon_sysfs_quotas_ms_attr =
__ATTR_RW_MODE(ms, 0600);
static struct kobj_attribute damon_sysfs_quotas_sz_attr =
__ATTR_RW_MODE(bytes, 0600);
static struct kobj_attribute damon_sysfs_quotas_reset_interval_ms_attr =
__ATTR_RW_MODE(reset_interval_ms, 0600);
static struct kobj_attribute damon_sysfs_quotas_effective_bytes_attr =
__ATTR_RO_MODE(effective_bytes, 0400);
static struct attribute *damon_sysfs_quotas_attrs[] = {
&damon_sysfs_quotas_ms_attr.attr,
&damon_sysfs_quotas_sz_attr.attr,
&damon_sysfs_quotas_reset_interval_ms_attr.attr,
&damon_sysfs_quotas_effective_bytes_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_quotas);
static const struct kobj_type damon_sysfs_quotas_ktype = {
.release = damon_sysfs_quotas_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_quotas_groups,
};
struct damon_sysfs_access_pattern {
struct kobject kobj;
struct damon_sysfs_ul_range *sz;
struct damon_sysfs_ul_range *nr_accesses;
struct damon_sysfs_ul_range *age;
};
static
struct damon_sysfs_access_pattern *damon_sysfs_access_pattern_alloc(void)
{
struct damon_sysfs_access_pattern *access_pattern = kmalloc_obj(*access_pattern);
if (!access_pattern)
return NULL;
access_pattern->kobj = (struct kobject){};
return access_pattern;
}
static int damon_sysfs_access_pattern_add_range_dir(
struct damon_sysfs_access_pattern *access_pattern,
struct damon_sysfs_ul_range **range_dir_ptr,
char *name)
{
struct damon_sysfs_ul_range *range = damon_sysfs_ul_range_alloc(0, 0);
int err;
if (!range)
return -ENOMEM;
err = kobject_init_and_add(&range->kobj, &damon_sysfs_ul_range_ktype,
&access_pattern->kobj, "%s", name);
if (err)
kobject_put(&range->kobj);
else
*range_dir_ptr = range;
return err;
}
static int damon_sysfs_access_pattern_add_dirs(
struct damon_sysfs_access_pattern *access_pattern)
{
int err;
err = damon_sysfs_access_pattern_add_range_dir(access_pattern,
&access_pattern->sz, "sz");
if (err)
goto put_sz_out;
err = damon_sysfs_access_pattern_add_range_dir(access_pattern,
&access_pattern->nr_accesses, "nr_accesses");
if (err)
goto put_nr_accesses_sz_out;
err = damon_sysfs_access_pattern_add_range_dir(access_pattern,
&access_pattern->age, "age");
if (err)
goto put_age_nr_accesses_sz_out;
return 0;
put_age_nr_accesses_sz_out:
kobject_put(&access_pattern->age->kobj);
access_pattern->age = NULL;
put_nr_accesses_sz_out:
kobject_put(&access_pattern->nr_accesses->kobj);
access_pattern->nr_accesses = NULL;
put_sz_out:
kobject_put(&access_pattern->sz->kobj);
access_pattern->sz = NULL;
return err;
}
static void damon_sysfs_access_pattern_rm_dirs(
struct damon_sysfs_access_pattern *access_pattern)
{
kobject_put(&access_pattern->sz->kobj);
kobject_put(&access_pattern->nr_accesses->kobj);
kobject_put(&access_pattern->age->kobj);
}
static void damon_sysfs_access_pattern_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_access_pattern, kobj));
}
static struct attribute *damon_sysfs_access_pattern_attrs[] = {
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_access_pattern);
static const struct kobj_type damon_sysfs_access_pattern_ktype = {
.release = damon_sysfs_access_pattern_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_access_pattern_groups,
};
struct damos_sysfs_dest {
struct kobject kobj;
unsigned int id;
unsigned int weight;
};
static struct damos_sysfs_dest *damos_sysfs_dest_alloc(void)
{
return kzalloc_obj(struct damos_sysfs_dest);
}
static ssize_t id_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
struct damos_sysfs_dest *dest = container_of(kobj,
struct damos_sysfs_dest, kobj);
return sysfs_emit(buf, "%u\n", dest->id);
}
static ssize_t id_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damos_sysfs_dest *dest = container_of(kobj,
struct damos_sysfs_dest, kobj);
int err = kstrtouint(buf, 0, &dest->id);
return err ? err : count;
}
static ssize_t weight_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
struct damos_sysfs_dest *dest = container_of(kobj,
struct damos_sysfs_dest, kobj);
return sysfs_emit(buf, "%u\n", dest->weight);
}
static ssize_t weight_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damos_sysfs_dest *dest = container_of(kobj,
struct damos_sysfs_dest, kobj);
int err = kstrtouint(buf, 0, &dest->weight);
return err ? err : count;
}
static void damos_sysfs_dest_release(struct kobject *kobj)
{
struct damos_sysfs_dest *dest = container_of(kobj,
struct damos_sysfs_dest, kobj);
kfree(dest);
}
static struct kobj_attribute damos_sysfs_dest_id_attr =
__ATTR_RW_MODE(id, 0600);
static struct kobj_attribute damos_sysfs_dest_weight_attr =
__ATTR_RW_MODE(weight, 0600);
static struct attribute *damos_sysfs_dest_attrs[] = {
&damos_sysfs_dest_id_attr.attr,
&damos_sysfs_dest_weight_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damos_sysfs_dest);
static const struct kobj_type damos_sysfs_dest_ktype = {
.release = damos_sysfs_dest_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damos_sysfs_dest_groups,
};
struct damos_sysfs_dests {
struct kobject kobj;
struct damos_sysfs_dest **dests_arr;
int nr;
};
static struct damos_sysfs_dests *
damos_sysfs_dests_alloc(void)
{
return kzalloc_obj(struct damos_sysfs_dests);
}
static void damos_sysfs_dests_rm_dirs(
struct damos_sysfs_dests *dests)
{
struct damos_sysfs_dest **dests_arr = dests->dests_arr;
int i;
for (i = 0; i < dests->nr; i++)
kobject_put(&dests_arr[i]->kobj);
dests->nr = 0;
kfree(dests_arr);
dests->dests_arr = NULL;
}
static int damos_sysfs_dests_add_dirs(
struct damos_sysfs_dests *dests, int nr_dests)
{
struct damos_sysfs_dest **dests_arr, *dest;
int err, i;
damos_sysfs_dests_rm_dirs(dests);
if (!nr_dests)
return 0;
dests_arr = kmalloc_objs(*dests_arr, nr_dests,
GFP_KERNEL | __GFP_NOWARN);
if (!dests_arr)
return -ENOMEM;
dests->dests_arr = dests_arr;
for (i = 0; i < nr_dests; i++) {
dest = damos_sysfs_dest_alloc();
if (!dest) {
damos_sysfs_dests_rm_dirs(dests);
return -ENOMEM;
}
err = kobject_init_and_add(&dest->kobj,
&damos_sysfs_dest_ktype,
&dests->kobj, "%d", i);
if (err) {
kobject_put(&dest->kobj);
damos_sysfs_dests_rm_dirs(dests);
return err;
}
dests_arr[i] = dest;
dests->nr++;
}
return 0;
}
static ssize_t nr_dests_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damos_sysfs_dests *dests = container_of(kobj,
struct damos_sysfs_dests, kobj);
return sysfs_emit(buf, "%d\n", dests->nr);
}
static ssize_t nr_dests_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damos_sysfs_dests *dests;
int nr, err = kstrtoint(buf, 0, &nr);
if (err)
return err;
if (nr < 0)
return -EINVAL;
dests = container_of(kobj, struct damos_sysfs_dests, kobj);
if (!mutex_trylock(&damon_sysfs_lock))
return -EBUSY;
err = damos_sysfs_dests_add_dirs(dests, nr);
mutex_unlock(&damon_sysfs_lock);
if (err)
return err;
return count;
}
static void damos_sysfs_dests_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damos_sysfs_dests, kobj));
}
static struct kobj_attribute damos_sysfs_dests_nr_attr =
__ATTR_RW_MODE(nr_dests, 0600);
static struct attribute *damos_sysfs_dests_attrs[] = {
&damos_sysfs_dests_nr_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damos_sysfs_dests);
static const struct kobj_type damos_sysfs_dests_ktype = {
.release = damos_sysfs_dests_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damos_sysfs_dests_groups,
};
struct damon_sysfs_scheme {
struct kobject kobj;
enum damos_action action;
struct damon_sysfs_access_pattern *access_pattern;
unsigned long apply_interval_us;
struct damon_sysfs_quotas *quotas;
struct damon_sysfs_watermarks *watermarks;
struct damon_sysfs_scheme_filters *core_filters;
struct damon_sysfs_scheme_filters *ops_filters;
struct damon_sysfs_scheme_filters *filters;
struct damon_sysfs_stats *stats;
struct damon_sysfs_scheme_regions *tried_regions;
int target_nid;
struct damos_sysfs_dests *dests;
};
struct damos_sysfs_action_name {
enum damos_action action;
char *name;
};
static struct damos_sysfs_action_name damos_sysfs_action_names[] = {
{
.action = DAMOS_WILLNEED,
.name = "willneed",
},
{
.action = DAMOS_COLD,
.name = "cold",
},
{
.action = DAMOS_PAGEOUT,
.name = "pageout",
},
{
.action = DAMOS_HUGEPAGE,
.name = "hugepage",
},
{
.action = DAMOS_NOHUGEPAGE,
.name = "nohugepage",
},
{
.action = DAMOS_LRU_PRIO,
.name = "lru_prio",
},
{
.action = DAMOS_LRU_DEPRIO,
.name = "lru_deprio",
},
{
.action = DAMOS_MIGRATE_HOT,
.name = "migrate_hot",
},
{
.action = DAMOS_MIGRATE_COLD,
.name = "migrate_cold",
},
{
.action = DAMOS_STAT,
.name = "stat",
},
};
static struct damon_sysfs_scheme *damon_sysfs_scheme_alloc(
enum damos_action action, unsigned long apply_interval_us)
{
struct damon_sysfs_scheme *scheme = kmalloc_obj(*scheme);
if (!scheme)
return NULL;
scheme->kobj = (struct kobject){};
scheme->action = action;
scheme->apply_interval_us = apply_interval_us;
scheme->target_nid = NUMA_NO_NODE;
return scheme;
}
static int damon_sysfs_scheme_set_access_pattern(
struct damon_sysfs_scheme *scheme)
{
struct damon_sysfs_access_pattern *access_pattern;
int err;
access_pattern = damon_sysfs_access_pattern_alloc();
if (!access_pattern)
return -ENOMEM;
err = kobject_init_and_add(&access_pattern->kobj,
&damon_sysfs_access_pattern_ktype, &scheme->kobj,
"access_pattern");
if (err)
goto out;
err = damon_sysfs_access_pattern_add_dirs(access_pattern);
if (err)
goto out;
scheme->access_pattern = access_pattern;
return 0;
out:
kobject_put(&access_pattern->kobj);
return err;
}
static int damos_sysfs_set_dests(struct damon_sysfs_scheme *scheme)
{
struct damos_sysfs_dests *dests = damos_sysfs_dests_alloc();
int err;
if (!dests)
return -ENOMEM;
err = kobject_init_and_add(&dests->kobj, &damos_sysfs_dests_ktype,
&scheme->kobj, "dests");
if (err)
kobject_put(&dests->kobj);
else
scheme->dests = dests;
return err;
}
static int damon_sysfs_scheme_set_quotas(struct damon_sysfs_scheme *scheme)
{
struct damon_sysfs_quotas *quotas = damon_sysfs_quotas_alloc();
int err;
if (!quotas)
return -ENOMEM;
err = kobject_init_and_add("as->kobj, &damon_sysfs_quotas_ktype,
&scheme->kobj, "quotas");
if (err)
goto out;
err = damon_sysfs_quotas_add_dirs(quotas);
if (err)
goto out;
scheme->quotas = quotas;
return 0;
out:
kobject_put("as->kobj);
return err;
}
static int damon_sysfs_scheme_set_watermarks(struct damon_sysfs_scheme *scheme)
{
struct damon_sysfs_watermarks *watermarks =
damon_sysfs_watermarks_alloc(DAMOS_WMARK_NONE, 0, 0, 0, 0);
int err;
if (!watermarks)
return -ENOMEM;
err = kobject_init_and_add(&watermarks->kobj,
&damon_sysfs_watermarks_ktype, &scheme->kobj,
"watermarks");
if (err)
kobject_put(&watermarks->kobj);
else
scheme->watermarks = watermarks;
return err;
}
static int damon_sysfs_scheme_set_filters(struct damon_sysfs_scheme *scheme,
enum damos_sysfs_filter_handle_layer layer, const char *name,
struct damon_sysfs_scheme_filters **filters_ptr)
{
struct damon_sysfs_scheme_filters *filters =
damon_sysfs_scheme_filters_alloc(layer);
int err;
if (!filters)
return -ENOMEM;
err = kobject_init_and_add(&filters->kobj,
&damon_sysfs_scheme_filters_ktype, &scheme->kobj,
"%s", name);
if (err)
kobject_put(&filters->kobj);
else
*filters_ptr = filters;
return err;
}
static int damos_sysfs_set_filter_dirs(struct damon_sysfs_scheme *scheme)
{
int err;
err = damon_sysfs_scheme_set_filters(scheme,
DAMOS_SYSFS_FILTER_HANDLE_LAYER_BOTH, "filters",
&scheme->filters);
if (err)
return err;
err = damon_sysfs_scheme_set_filters(scheme,
DAMOS_SYSFS_FILTER_HANDLE_LAYER_CORE, "core_filters",
&scheme->core_filters);
if (err)
goto put_filters_out;
err = damon_sysfs_scheme_set_filters(scheme,
DAMOS_SYSFS_FILTER_HANDLE_LAYER_OPS, "ops_filters",
&scheme->ops_filters);
if (err)
goto put_core_filters_out;
return 0;
put_core_filters_out:
kobject_put(&scheme->core_filters->kobj);
scheme->core_filters = NULL;
put_filters_out:
kobject_put(&scheme->filters->kobj);
scheme->filters = NULL;
return err;
}
static int damon_sysfs_scheme_set_stats(struct damon_sysfs_scheme *scheme)
{
struct damon_sysfs_stats *stats = damon_sysfs_stats_alloc();
int err;
if (!stats)
return -ENOMEM;
err = kobject_init_and_add(&stats->kobj, &damon_sysfs_stats_ktype,
&scheme->kobj, "stats");
if (err)
kobject_put(&stats->kobj);
else
scheme->stats = stats;
return err;
}
static int damon_sysfs_scheme_set_tried_regions(
struct damon_sysfs_scheme *scheme)
{
struct damon_sysfs_scheme_regions *tried_regions =
damon_sysfs_scheme_regions_alloc();
int err;
if (!tried_regions)
return -ENOMEM;
err = kobject_init_and_add(&tried_regions->kobj,
&damon_sysfs_scheme_regions_ktype, &scheme->kobj,
"tried_regions");
if (err)
kobject_put(&tried_regions->kobj);
else
scheme->tried_regions = tried_regions;
return err;
}
static int damon_sysfs_scheme_add_dirs(struct damon_sysfs_scheme *scheme)
{
int err;
err = damon_sysfs_scheme_set_access_pattern(scheme);
if (err)
return err;
err = damos_sysfs_set_dests(scheme);
if (err)
goto rmdir_put_access_pattern_out;
err = damon_sysfs_scheme_set_quotas(scheme);
if (err)
goto put_dests_out;
err = damon_sysfs_scheme_set_watermarks(scheme);
if (err)
goto rmdir_put_quotas_access_pattern_out;
err = damos_sysfs_set_filter_dirs(scheme);
if (err)
goto put_watermarks_quotas_access_pattern_out;
err = damon_sysfs_scheme_set_stats(scheme);
if (err)
goto put_filters_watermarks_quotas_access_pattern_out;
err = damon_sysfs_scheme_set_tried_regions(scheme);
if (err)
goto put_tried_regions_out;
return 0;
put_tried_regions_out:
kobject_put(&scheme->tried_regions->kobj);
scheme->tried_regions = NULL;
put_filters_watermarks_quotas_access_pattern_out:
kobject_put(&scheme->ops_filters->kobj);
scheme->ops_filters = NULL;
kobject_put(&scheme->core_filters->kobj);
scheme->core_filters = NULL;
kobject_put(&scheme->filters->kobj);
scheme->filters = NULL;
put_watermarks_quotas_access_pattern_out:
kobject_put(&scheme->watermarks->kobj);
scheme->watermarks = NULL;
rmdir_put_quotas_access_pattern_out:
damon_sysfs_quotas_rm_dirs(scheme->quotas);
kobject_put(&scheme->quotas->kobj);
scheme->quotas = NULL;
put_dests_out:
kobject_put(&scheme->dests->kobj);
scheme->dests = NULL;
rmdir_put_access_pattern_out:
damon_sysfs_access_pattern_rm_dirs(scheme->access_pattern);
kobject_put(&scheme->access_pattern->kobj);
scheme->access_pattern = NULL;
return err;
}
static void damon_sysfs_scheme_rm_dirs(struct damon_sysfs_scheme *scheme)
{
damon_sysfs_access_pattern_rm_dirs(scheme->access_pattern);
kobject_put(&scheme->access_pattern->kobj);
damos_sysfs_dests_rm_dirs(scheme->dests);
kobject_put(&scheme->dests->kobj);
damon_sysfs_quotas_rm_dirs(scheme->quotas);
kobject_put(&scheme->quotas->kobj);
kobject_put(&scheme->watermarks->kobj);
damon_sysfs_scheme_filters_rm_dirs(scheme->filters);
kobject_put(&scheme->filters->kobj);
damon_sysfs_scheme_filters_rm_dirs(scheme->core_filters);
kobject_put(&scheme->core_filters->kobj);
damon_sysfs_scheme_filters_rm_dirs(scheme->ops_filters);
kobject_put(&scheme->ops_filters->kobj);
kobject_put(&scheme->stats->kobj);
damon_sysfs_scheme_regions_rm_dirs(scheme->tried_regions);
kobject_put(&scheme->tried_regions->kobj);
}
static ssize_t action_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct damon_sysfs_scheme *scheme = container_of(kobj,
struct damon_sysfs_scheme, kobj);
int i;
for (i = 0; i < ARRAY_SIZE(damos_sysfs_action_names); i++) {
struct damos_sysfs_action_name *action_name;
action_name = &damos_sysfs_action_names[i];
if (action_name->action == scheme->action)
return sysfs_emit(buf, "%s\n", action_name->name);
}
return -EINVAL;
}
static ssize_t action_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct damon_sysfs_scheme *scheme = container_of(kobj,
struct damon_sysfs_scheme, kobj);
int i;
for (i = 0; i < ARRAY_SIZE(damos_sysfs_action_names); i++) {
struct damos_sysfs_action_name *action_name;
action_name = &damos_sysfs_action_names[i];
if (sysfs_streq(buf, action_name->name)) {
scheme->action = action_name->action;
return count;
}
}
return -EINVAL;
}
static ssize_t apply_interval_us_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme *scheme = container_of(kobj,
struct damon_sysfs_scheme, kobj);
return sysfs_emit(buf, "%lu\n", scheme->apply_interval_us);
}
static ssize_t apply_interval_us_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme *scheme = container_of(kobj,
struct damon_sysfs_scheme, kobj);
int err = kstrtoul(buf, 0, &scheme->apply_interval_us);
return err ? err : count;
}
static ssize_t target_nid_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme *scheme = container_of(kobj,
struct damon_sysfs_scheme, kobj);
return sysfs_emit(buf, "%d\n", scheme->target_nid);
}
static ssize_t target_nid_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme *scheme = container_of(kobj,
struct damon_sysfs_scheme, kobj);
int err = 0;
err = kstrtoint(buf, 0, &scheme->target_nid);
return err ? err : count;
}
static void damon_sysfs_scheme_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_scheme, kobj));
}
static struct kobj_attribute damon_sysfs_scheme_action_attr =
__ATTR_RW_MODE(action, 0600);
static struct kobj_attribute damon_sysfs_scheme_apply_interval_us_attr =
__ATTR_RW_MODE(apply_interval_us, 0600);
static struct kobj_attribute damon_sysfs_scheme_target_nid_attr =
__ATTR_RW_MODE(target_nid, 0600);
static struct attribute *damon_sysfs_scheme_attrs[] = {
&damon_sysfs_scheme_action_attr.attr,
&damon_sysfs_scheme_apply_interval_us_attr.attr,
&damon_sysfs_scheme_target_nid_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_scheme);
static const struct kobj_type damon_sysfs_scheme_ktype = {
.release = damon_sysfs_scheme_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_scheme_groups,
};
struct damon_sysfs_schemes *damon_sysfs_schemes_alloc(void)
{
return kzalloc_obj(struct damon_sysfs_schemes);
}
void damon_sysfs_schemes_rm_dirs(struct damon_sysfs_schemes *schemes)
{
struct damon_sysfs_scheme **schemes_arr = schemes->schemes_arr;
int i;
for (i = 0; i < schemes->nr; i++) {
damon_sysfs_scheme_rm_dirs(schemes_arr[i]);
kobject_put(&schemes_arr[i]->kobj);
}
schemes->nr = 0;
kfree(schemes_arr);
schemes->schemes_arr = NULL;
}
static int damon_sysfs_schemes_add_dirs(struct damon_sysfs_schemes *schemes,
int nr_schemes)
{
struct damon_sysfs_scheme **schemes_arr, *scheme;
int err, i;
damon_sysfs_schemes_rm_dirs(schemes);
if (!nr_schemes)
return 0;
schemes_arr = kmalloc_objs(*schemes_arr, nr_schemes,
GFP_KERNEL | __GFP_NOWARN);
if (!schemes_arr)
return -ENOMEM;
schemes->schemes_arr = schemes_arr;
for (i = 0; i < nr_schemes; i++) {
scheme = damon_sysfs_scheme_alloc(DAMOS_STAT, 0);
if (!scheme) {
damon_sysfs_schemes_rm_dirs(schemes);
return -ENOMEM;
}
err = kobject_init_and_add(&scheme->kobj,
&damon_sysfs_scheme_ktype, &schemes->kobj,
"%d", i);
if (err)
goto out;
err = damon_sysfs_scheme_add_dirs(scheme);
if (err)
goto out;
schemes_arr[i] = scheme;
schemes->nr++;
}
return 0;
out:
damon_sysfs_schemes_rm_dirs(schemes);
kobject_put(&scheme->kobj);
return err;
}
static ssize_t nr_schemes_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_schemes *schemes = container_of(kobj,
struct damon_sysfs_schemes, kobj);
return sysfs_emit(buf, "%d\n", schemes->nr);
}
static ssize_t nr_schemes_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_schemes *schemes;
int nr, err = kstrtoint(buf, 0, &nr);
if (err)
return err;
if (nr < 0)
return -EINVAL;
schemes = container_of(kobj, struct damon_sysfs_schemes, kobj);
if (!mutex_trylock(&damon_sysfs_lock))
return -EBUSY;
err = damon_sysfs_schemes_add_dirs(schemes, nr);
mutex_unlock(&damon_sysfs_lock);
if (err)
return err;
return count;
}
static void damon_sysfs_schemes_release(struct kobject *kobj)
{
kfree(container_of(kobj, struct damon_sysfs_schemes, kobj));
}
static struct kobj_attribute damon_sysfs_schemes_nr_attr =
__ATTR_RW_MODE(nr_schemes, 0600);
static struct attribute *damon_sysfs_schemes_attrs[] = {
&damon_sysfs_schemes_nr_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(damon_sysfs_schemes);
const struct kobj_type damon_sysfs_schemes_ktype = {
.release = damon_sysfs_schemes_release,
.sysfs_ops = &kobj_sysfs_ops,
.default_groups = damon_sysfs_schemes_groups,
};
static bool damon_sysfs_memcg_path_eq(struct mem_cgroup *memcg,
char *memcg_path_buf, char *path)
{
#ifdef CONFIG_MEMCG
cgroup_path(memcg->css.cgroup, memcg_path_buf, PATH_MAX);
if (sysfs_streq(memcg_path_buf, path))
return true;
#endif
return false;
}
static int damon_sysfs_memcg_path_to_id(char *memcg_path, u64 *id)
{
struct mem_cgroup *memcg;
char *path;
bool found = false;
if (!memcg_path)
return -EINVAL;
path = kmalloc_array(PATH_MAX, sizeof(*path), GFP_KERNEL);
if (!path)
return -ENOMEM;
for (memcg = mem_cgroup_iter(NULL, NULL, NULL); memcg;
memcg = mem_cgroup_iter(NULL, memcg, NULL)) {
if (!mem_cgroup_online(memcg))
continue;
if (damon_sysfs_memcg_path_eq(memcg, path, memcg_path)) {
*id = mem_cgroup_id(memcg);
found = true;
break;
}
}
kfree(path);
return found ? 0 : -EINVAL;
}
static int damon_sysfs_add_scheme_filters(struct damos *scheme,
struct damon_sysfs_scheme_filters *sysfs_filters)
{
int i;
for (i = 0; i < sysfs_filters->nr; i++) {
struct damon_sysfs_scheme_filter *sysfs_filter =
sysfs_filters->filters_arr[i];
struct damos_filter *filter =
damos_new_filter(sysfs_filter->type,
sysfs_filter->matching,
sysfs_filter->allow);
int err;
if (!filter)
return -ENOMEM;
if (filter->type == DAMOS_FILTER_TYPE_MEMCG) {
err = damon_sysfs_memcg_path_to_id(
sysfs_filter->memcg_path,
&filter->memcg_id);
if (err) {
damos_destroy_filter(filter);
return err;
}
} else if (filter->type == DAMOS_FILTER_TYPE_ADDR) {
if (sysfs_filter->addr_range.end <
sysfs_filter->addr_range.start) {
damos_destroy_filter(filter);
return -EINVAL;
}
filter->addr_range = sysfs_filter->addr_range;
} else if (filter->type == DAMOS_FILTER_TYPE_TARGET) {
filter->target_idx = sysfs_filter->target_idx;
} else if (filter->type == DAMOS_FILTER_TYPE_HUGEPAGE_SIZE) {
if (sysfs_filter->sz_range.min >
sysfs_filter->sz_range.max) {
damos_destroy_filter(filter);
return -EINVAL;
}
filter->sz_range = sysfs_filter->sz_range;
}
damos_add_filter(scheme, filter);
}
return 0;
}
static int damos_sysfs_add_quota_score(
struct damos_sysfs_quota_goals *sysfs_goals,
struct damos_quota *quota)
{
struct damos_quota_goal *goal;
int i, err;
for (i = 0; i < sysfs_goals->nr; i++) {
struct damos_sysfs_quota_goal *sysfs_goal =
sysfs_goals->goals_arr[i];
if (!sysfs_goal->target_value)
continue;
goal = damos_new_quota_goal(sysfs_goal->metric,
sysfs_goal->target_value);
if (!goal)
return -ENOMEM;
switch (sysfs_goal->metric) {
case DAMOS_QUOTA_USER_INPUT:
goal->current_value = sysfs_goal->current_value;
break;
case DAMOS_QUOTA_NODE_MEM_USED_BP:
case DAMOS_QUOTA_NODE_MEM_FREE_BP:
goal->nid = sysfs_goal->nid;
break;
case DAMOS_QUOTA_NODE_MEMCG_USED_BP:
case DAMOS_QUOTA_NODE_MEMCG_FREE_BP:
err = damon_sysfs_memcg_path_to_id(
sysfs_goal->path, &goal->memcg_id);
if (err) {
damos_destroy_quota_goal(goal);
return err;
}
goal->nid = sysfs_goal->nid;
break;
default:
break;
}
damos_add_quota_goal(quota, goal);
}
return 0;
}
int damos_sysfs_set_quota_scores(struct damon_sysfs_schemes *sysfs_schemes,
struct damon_ctx *ctx)
{
struct damos *scheme;
struct damos_quota quota = {};
int i = 0;
INIT_LIST_HEAD("a.goals);
damon_for_each_scheme(scheme, ctx) {
struct damon_sysfs_scheme *sysfs_scheme;
struct damos_quota_goal *g, *g_next;
int err;
if (i >= sysfs_schemes->nr)
break;
sysfs_scheme = sysfs_schemes->schemes_arr[i];
err = damos_sysfs_add_quota_score(sysfs_scheme->quotas->goals,
"a);
if (err) {
damos_for_each_quota_goal_safe(g, g_next, "a)
damos_destroy_quota_goal(g);
return err;
}
err = damos_commit_quota_goals(&scheme->quota, "a);
damos_for_each_quota_goal_safe(g, g_next, "a)
damos_destroy_quota_goal(g);
if (err)
return err;
i++;
}
return 0;
}
void damos_sysfs_update_effective_quotas(
struct damon_sysfs_schemes *sysfs_schemes,
struct damon_ctx *ctx)
{
struct damos *scheme;
int schemes_idx = 0;
damon_for_each_scheme(scheme, ctx) {
struct damon_sysfs_quotas *sysfs_quotas;
if (schemes_idx >= sysfs_schemes->nr)
break;
sysfs_quotas =
sysfs_schemes->schemes_arr[schemes_idx++]->quotas;
sysfs_quotas->effective_sz = scheme->quota.esz;
}
}
static int damos_sysfs_add_migrate_dest(struct damos *scheme,
struct damos_sysfs_dests *sysfs_dests)
{
struct damos_migrate_dests *dests = &scheme->migrate_dests;
int i;
dests->node_id_arr = kmalloc_objs(*dests->node_id_arr, sysfs_dests->nr);
if (!dests->node_id_arr)
return -ENOMEM;
dests->weight_arr = kmalloc_objs(*dests->weight_arr, sysfs_dests->nr);
if (!dests->weight_arr)
return -ENOMEM;
for (i = 0; i < sysfs_dests->nr; i++) {
dests->node_id_arr[i] = sysfs_dests->dests_arr[i]->id;
dests->weight_arr[i] = sysfs_dests->dests_arr[i]->weight;
}
dests->nr_dests = sysfs_dests->nr;
return 0;
}
static struct damos *damon_sysfs_mk_scheme(
struct damon_sysfs_scheme *sysfs_scheme)
{
struct damon_sysfs_access_pattern *access_pattern =
sysfs_scheme->access_pattern;
struct damon_sysfs_quotas *sysfs_quotas = sysfs_scheme->quotas;
struct damon_sysfs_weights *sysfs_weights = sysfs_quotas->weights;
struct damon_sysfs_watermarks *sysfs_wmarks = sysfs_scheme->watermarks;
struct damos *scheme;
int err;
struct damos_access_pattern pattern = {
.min_sz_region = access_pattern->sz->min,
.max_sz_region = access_pattern->sz->max,
.min_nr_accesses = access_pattern->nr_accesses->min,
.max_nr_accesses = access_pattern->nr_accesses->max,
.min_age_region = access_pattern->age->min,
.max_age_region = access_pattern->age->max,
};
struct damos_quota quota = {
.ms = sysfs_quotas->ms,
.sz = sysfs_quotas->sz,
.reset_interval = sysfs_quotas->reset_interval_ms,
.weight_sz = sysfs_weights->sz,
.weight_nr_accesses = sysfs_weights->nr_accesses,
.weight_age = sysfs_weights->age,
};
struct damos_watermarks wmarks = {
.metric = sysfs_wmarks->metric,
.interval = sysfs_wmarks->interval_us,
.high = sysfs_wmarks->high,
.mid = sysfs_wmarks->mid,
.low = sysfs_wmarks->low,
};
scheme = damon_new_scheme(&pattern, sysfs_scheme->action,
sysfs_scheme->apply_interval_us, "a, &wmarks,
sysfs_scheme->target_nid);
if (!scheme)
return NULL;
err = damos_sysfs_add_quota_score(sysfs_quotas->goals, &scheme->quota);
if (err) {
damon_destroy_scheme(scheme);
return NULL;
}
err = damon_sysfs_add_scheme_filters(scheme, sysfs_scheme->core_filters);
if (err) {
damon_destroy_scheme(scheme);
return NULL;
}
err = damon_sysfs_add_scheme_filters(scheme, sysfs_scheme->ops_filters);
if (err) {
damon_destroy_scheme(scheme);
return NULL;
}
err = damon_sysfs_add_scheme_filters(scheme, sysfs_scheme->filters);
if (err) {
damon_destroy_scheme(scheme);
return NULL;
}
err = damos_sysfs_add_migrate_dest(scheme, sysfs_scheme->dests);
if (err) {
damon_destroy_scheme(scheme);
return NULL;
}
scheme->max_nr_snapshots = sysfs_scheme->stats->max_nr_snapshots;
return scheme;
}
int damon_sysfs_add_schemes(struct damon_ctx *ctx,
struct damon_sysfs_schemes *sysfs_schemes)
{
int i;
for (i = 0; i < sysfs_schemes->nr; i++) {
struct damos *scheme, *next;
scheme = damon_sysfs_mk_scheme(sysfs_schemes->schemes_arr[i]);
if (!scheme) {
damon_for_each_scheme_safe(scheme, next, ctx)
damon_destroy_scheme(scheme);
return -ENOMEM;
}
damon_add_scheme(ctx, scheme);
}
return 0;
}
void damon_sysfs_schemes_update_stats(
struct damon_sysfs_schemes *sysfs_schemes,
struct damon_ctx *ctx)
{
struct damos *scheme;
int schemes_idx = 0;
damon_for_each_scheme(scheme, ctx) {
struct damon_sysfs_stats *sysfs_stats;
if (schemes_idx >= sysfs_schemes->nr)
break;
sysfs_stats = sysfs_schemes->schemes_arr[schemes_idx++]->stats;
sysfs_stats->nr_tried = scheme->stat.nr_tried;
sysfs_stats->sz_tried = scheme->stat.sz_tried;
sysfs_stats->nr_applied = scheme->stat.nr_applied;
sysfs_stats->sz_applied = scheme->stat.sz_applied;
sysfs_stats->sz_ops_filter_passed =
scheme->stat.sz_ops_filter_passed;
sysfs_stats->qt_exceeds = scheme->stat.qt_exceeds;
sysfs_stats->nr_snapshots = scheme->stat.nr_snapshots;
}
}
void damos_sysfs_populate_region_dir(struct damon_sysfs_schemes *sysfs_schemes,
struct damon_ctx *ctx, struct damon_target *t,
struct damon_region *r, struct damos *s, bool total_bytes_only,
unsigned long sz_filter_passed)
{
struct damos *scheme;
struct damon_sysfs_scheme_regions *sysfs_regions;
struct damon_sysfs_scheme_region *region;
int schemes_idx = 0;
damon_for_each_scheme(scheme, ctx) {
if (scheme == s)
break;
schemes_idx++;
}
if (schemes_idx >= sysfs_schemes->nr)
return;
sysfs_regions = sysfs_schemes->schemes_arr[schemes_idx]->tried_regions;
sysfs_regions->total_bytes += r->ar.end - r->ar.start;
if (total_bytes_only)
return;
region = damon_sysfs_scheme_region_alloc(r);
if (!region)
return;
region->sz_filter_passed = sz_filter_passed;
list_add_tail(®ion->list, &sysfs_regions->regions_list);
sysfs_regions->nr_regions++;
if (kobject_init_and_add(®ion->kobj,
&damon_sysfs_scheme_region_ktype,
&sysfs_regions->kobj, "%d",
sysfs_regions->nr_regions++)) {
kobject_put(®ion->kobj);
}
}
int damon_sysfs_schemes_clear_regions(
struct damon_sysfs_schemes *sysfs_schemes)
{
int i;
for (i = 0; i < sysfs_schemes->nr; i++) {
struct damon_sysfs_scheme *sysfs_scheme;
sysfs_scheme = sysfs_schemes->schemes_arr[i];
damon_sysfs_scheme_regions_rm_dirs(
sysfs_scheme->tried_regions);
sysfs_scheme->tried_regions->total_bytes = 0;
}
return 0;
}
