[PATCH 4/6] alloc_tag: add accuracy based filtering to ioctl

[Abhishek Bapat]

Extend the allocinfo filtering mechanism to allow users to filter tags
based on their accuracy.

Signed-off-by: Abhishek Bapat <abhishekbapat@xxxxxxxxxx>
---
 include/uapi/linux/alloc_tag.h | 3 +++
 lib/alloc_tag.c                | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/include/uapi/linux/alloc_tag.h b/include/uapi/linux/alloc_tag.h
index 229068efd24c..99dfe951b185 100644
--- a/include/uapi/linux/alloc_tag.h
+++ b/include/uapi/linux/alloc_tag.h
@@ -20,6 +20,7 @@ struct allocinfo_tag {
 	char function[ALLOCINFO_STR_SIZE];
 	char filename[ALLOCINFO_STR_SIZE];
 	__u64 lineno;
+	__u64 inaccurate;
 	__u64 min_size;
 	__u64 max_size;
 };
@@ -41,6 +42,7 @@ enum {
 	ALLOCINFO_FILTER_FUNCTION,
 	ALLOCINFO_FILTER_FILENAME,
 	ALLOCINFO_FILTER_LINENO,
+	ALLOCINFO_FILTER_INACCURATE,
 	ALLOCINFO_FILTER_MIN_SIZE,
 	ALLOCINFO_FILTER_MAX_SIZE,
 	__ALLOCINFO_FILTER_LAST = ALLOCINFO_FILTER_MAX_SIZE
@@ -50,6 +52,7 @@ enum {
 #define ALLOCINFO_FILTER_MASK_FUNCTION		(1 << ALLOCINFO_FILTER_FUNCTION)
 #define ALLOCINFO_FILTER_MASK_FILENAME		(1 << ALLOCINFO_FILTER_FILENAME)
 #define ALLOCINFO_FILTER_MASK_LINENO		(1 << ALLOCINFO_FILTER_LINENO)
+#define ALLOCINFO_FILTER_MASK_INACCURATE	(1 << ALLOCINFO_FILTER_INACCURATE)
 #define ALLOCINFO_FILTER_MASK_MIN_SIZE		(1 << ALLOCINFO_FILTER_MIN_SIZE)
 #define ALLOCINFO_FILTER_MASK_MAX_SIZE		(1 << ALLOCINFO_FILTER_MAX_SIZE)
 
diff --git a/lib/alloc_tag.c b/lib/alloc_tag.c
index 98a27c302928..576ecb3c5b6c 100644
--- a/lib/alloc_tag.c
+++ b/lib/alloc_tag.c
@@ -197,6 +197,7 @@ static bool matches_filter(struct codetag *ct, struct allocinfo_filter *filter)
 {
 	struct alloc_tag *tag;
 	struct alloc_tag_counters counters;
+	bool inaccurate;
 
 	if (!ct || !filter || !filter->mask)
 		return true;
@@ -217,6 +218,12 @@ static bool matches_filter(struct codetag *ct, struct allocinfo_filter *filter)
 	    ct->lineno != filter->fields.lineno)
 		return false;
 
+	if (filter->mask & ALLOCINFO_FILTER_MASK_INACCURATE) {
+		inaccurate = !!(ct->flags & CODETAG_FLAG_INACCURATE);
+		if (inaccurate != filter->fields.inaccurate)
+			return false;
+	}
+
 	if ((filter->mask & ALLOCINFO_FILTER_MASK_MIN_SIZE) ||
 	    (filter->mask & ALLOCINFO_FILTER_MASK_MAX_SIZE)) {
 		tag = ct_to_alloc_tag(ct);
-- 
2.54.0.545.g6539524ca2-goog