[RFC PATCH 4/6] mm/damon/sysfs-schemes: setup range_{min,max} for probe_hits_wsum filter

[SJ Park <sj@kernel.org>]

Extend DAMON sysfs interface to support probe_hits_wsum input.  Also
update sysfs input based scheme build logic to setup the min/max probe
hits weighted sum range as user provided.

Signed-off-by: SJ Park <sj@kernel.org>
---
 mm/damon/sysfs-schemes.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c
index 4d9147d2a269e..e297a20c0af03 100644
--- a/mm/damon/sysfs-schemes.c
+++ b/mm/damon/sysfs-schemes.c
@@ -589,7 +589,10 @@ damos_sysfs_filter_type_names[] = {
 		.type = DAMOS_FILTER_TYPE_TARGET,
 		.name = "target",
 	},
-
+	{
+		.type = DAMOS_FILTER_TYPE_PROBE_HITS_WSUM,
+		.name = "probe_hits_wsum",
+	},
 };
 
 static ssize_t type_show(struct kobject *kobj,
@@ -2844,6 +2847,14 @@ static int damon_sysfs_add_scheme_filters(struct damos *scheme,
 			}
 			filter->sz_range.min = sysfs_filter->range_min;
 			filter->sz_range.max = sysfs_filter->range_max;
+		} else if (filter->type == DAMOS_FILTER_TYPE_PROBE_HITS_WSUM) {
+			if (sysfs_filter->range_min >
+					sysfs_filter->range_max) {
+				damos_destroy_filter(filter);
+				return -EINVAL;
+			}
+			filter->sz_range.min = sysfs_filter->range_min;
+			filter->sz_range.max = sysfs_filter->range_max;
 		}
 
 		damos_add_filter(scheme, filter);
-- 
2.47.3