linux-ext4 - [PATCH 18/21] ext2fs: Add extent dumping function to extent mapping code

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Message-Id: <1440606156-5754-19-git-send-email-jack@suse.com>
Date:	Wed, 26 Aug 2015 18:22:33 +0200
From:	Jan Kara <jack@...e.com>
To:	linux-ext4@...r.kernel.org
Cc:	Ted Tso <tytso@....edu>,
	"Darrick J. Wong" <darrick.wong@...cle.com>,
	Jan Kara <jack@...e.com>
Subject: [PATCH 18/21] ext2fs: Add extent dumping function to extent mapping code

For testing extent mapping code, we will need the extent dumping
function. So copy that function over from the resize2fs version of the
code.

Signed-off-by: Jan Kara <jack@...e.com>
---
 lib/ext2fs/extent_map.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lib/ext2fs/extent_map.c b/lib/ext2fs/extent_map.c
index a4e1df404dca..0f1acc78b67f 100644
--- a/lib/ext2fs/extent_map.c
+++ b/lib/ext2fs/extent_map.c
@@ -231,3 +231,20 @@ errcode_t ext2fs_iterate_extent(ext2_map_extent extent, __u64 *old_loc,
 	*size = ent->size;
 	return 0;
 }
+
+/*
+ * For debugging only
+ */
+void ext2fs_extent_dump(ext2_map_extent extent, FILE *out)
+{
+	__u64	i;
+	struct ext2_map_extent_entry *ent;
+
+	fputs("# Extent dump:\n", out);
+	fprintf(out, "#\tNum=%llu, Size=%llu, Cursor=%llu, Sorted=%llu\n",
+	       extent->num, extent->size, extent->cursor, extent->sorted);
+	for (i=0, ent=extent->list; i < extent->num; i++, ent++) {
+		fprintf(out, "#\t\t %llu -> %llu (%llu)\n", ent->old_loc,
+			ent->new_loc, ent->size);
+	}
+}
-- 
2.1.4

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