[RFC PATCH v2 14/28] mm/damon/sysfs: setup probes on DAMON core API parameters

[SeongJae Park <sj@kernel.org>]

Add user-installed data probes to DAMON core API parameters, so that
user inputs for data probes are passed to DAMON core.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
 mm/damon/sysfs.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index ed7bb734a236b..e4dbf85feadc2 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -1855,6 +1855,40 @@ static int damon_sysfs_set_attrs(struct damon_ctx *ctx,
 	return damon_set_attrs(ctx, &attrs);
 }
 
+static int damon_sysfs_set_probes(struct damon_ctx *ctx,
+		struct damon_sysfs_probes *sys_probes)
+{
+	int i;
+
+	for (i = 0; i < sys_probes->nr; i++) {
+		struct damon_sysfs_filters *sys_filters =
+			sys_probes->probes_arr[i]->filters;
+		struct damon_probe *c;
+		int j;
+
+		if (!sys_filters)
+			continue;
+		c = damon_new_probe();
+		if (!c)
+			return -ENOMEM;
+		damon_add_probe(ctx, c);
+
+		for (j = 0; j < sys_filters->nr; j++) {
+			struct damon_sysfs_filter *sys_filter =
+				sys_filters->filters_arr[j];
+			struct damon_filter *filter;
+
+			filter = damon_new_filter(sys_filter->type,
+					sys_filter->matching,
+					sys_filter->allow);
+			if (!filter)
+				return -ENOMEM;
+			damon_add_filter(c, filter);
+		}
+	}
+	return 0;
+}
+
 static int damon_sysfs_set_regions(struct damon_target *t,
 		struct damon_sysfs_regions *sysfs_regions,
 		unsigned long min_region_sz)
@@ -1967,6 +2001,9 @@ static int damon_sysfs_apply_inputs(struct damon_ctx *ctx,
 				DAMON_MIN_REGION_SZ / sys_ctx->addr_unit, 1);
 	ctx->pause = sys_ctx->pause;
 	err = damon_sysfs_set_attrs(ctx, sys_ctx->attrs);
+	if (err)
+		return err;
+	err = damon_sysfs_set_probes(ctx, sys_ctx->attrs->probes);
 	if (err)
 		return err;
 	err = damon_sysfs_add_targets(ctx, sys_ctx->targets);
-- 
2.47.3