From be5c5788d4bbef1d02ef6e734342c99bb51cfacd Mon Sep 17 00:00:00 2001
From: Ondrej Kozina <okozina@redhat.com>
Date: Wed, 13 Apr 2022 12:30:06 +0200
Subject: [PATCH] Add support for superblock BLOCK_SIZE property.

---
 lib/utils_blkid.c | 13 +++++++++++++
 lib/utils_blkid.h |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/lib/utils_blkid.c b/lib/utils_blkid.c
index e0952ede..2e58783b 100644
--- a/lib/utils_blkid.c
+++ b/lib/utils_blkid.c
@@ -326,3 +326,16 @@ int blk_supported(void)
 #endif
 	return r;
 }
+
+unsigned blk_get_block_size(struct blkid_handle *h)
+{
+	const char *data;
+	unsigned block_size = 0;
+#ifdef HAVE_BLKID
+	if (!blk_is_superblock(h) || !blkid_probe_has_value(h->pr, "BLOCK_SIZE") ||
+	    blkid_probe_lookup_value(h->pr, "BLOCK_SIZE", &data, NULL) ||
+	    sscanf(data, "%u", &block_size) != 1)
+		block_size = 0;
+#endif
+	return block_size;
+}
diff --git a/lib/utils_blkid.h b/lib/utils_blkid.h
index 7ed6319d..78fb8679 100644
--- a/lib/utils_blkid.h
+++ b/lib/utils_blkid.h
@@ -62,4 +62,6 @@ int blk_do_wipe(struct blkid_handle *h);
 
 int blk_supported(void);
 
+unsigned blk_get_block_size(struct blkid_handle *h);
+
 #endif