[RFC PATCH 12/27] mm/damon/core: introduce DAMON_FILTER_TYPE_REPORT_MADE

[SJ Park <sj@kernel.org>]

Extend DAMON probe filter for the existence of data attribute reports
for the probing memory.  Define a new filter type, REPORT_MADE, for the
purpose.  Add a union argument for specifying the type of the reports
for the filter.  Update the new argument for the new type when new
filter parameters of the type are committed.

Signed-off-by: SJ Park <sj@kernel.org>
---
 include/linux/damon.h | 3 +++
 mm/damon/core.c       | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index ca0135c6f6700..cce7d344c585b 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -804,6 +804,7 @@ struct damon_prep {
  * @DAMON_FILTER_TYPE_PGIDLE_SET:	Pgidle is set.
  * @DAMON_FILTER_TYPE_HUGEPAGE_SIZE:	Page is part of a hugepage.
  * @DAMON_FILTER_TYPE_ACTIVE:		LRU-active pages.
+ * @DAMON_FILTER_TYPE_REPORT_MADE:	Report is submitted.
  */
 enum damon_filter_type {
 	DAMON_FILTER_TYPE_ANON,
@@ -812,6 +813,7 @@ enum damon_filter_type {
 	DAMON_FILTER_TYPE_PGIDLE_SET,
 	DAMON_FILTER_TYPE_HUGEPAGE_SIZE,
 	DAMON_FILTER_TYPE_ACTIVE,
+	DAMON_FILTER_TYPE_REPORT_MADE,
 };
 
 /**
@@ -834,6 +836,7 @@ struct damon_filter {
 			unsigned long range_min;
 			unsigned long range_max;
 		};
+		enum damon_report_type report_type;
 	};
 /* private: */
 	/* Siblings list. */
diff --git a/mm/damon/core.c b/mm/damon/core.c
index 06b85d00e38d9..c02c7fbc1d864 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1834,6 +1834,9 @@ static int damon_commit_filter(struct damon_filter *dst,
 		dst->range_min = src->range_min;
 		dst->range_max = src->range_max;
 		break;
+	case DAMON_FILTER_TYPE_REPORT_MADE:
+		dst->report_type = src->report_type;
+		break;
 	default:
 		break;
 	}
-- 
2.47.3