[Btrfs-devel][PATCH]Fix for test_range_bit

Yan Zheng yanzheng at 21cn.com
Mon Jan 21 00:42:33 PST 2008


Hello,

test_range_bit doesn't properly handle the case: there's a hole at the
end of the range and there's no other extent_state after the range.

Regards
YZ
---
diff -r ac53d7df4c11 extent_map.c
--- a/extent_map.c	Thu Jan 17 12:58:00 2008 -0500
+++ b/extent_map.c	Mon Jan 21 16:42:04 2008 +0800
@@ -1336,6 +1336,11 @@ int test_range_bit(struct extent_map_tre
 		if (start > end)
 			break;
 		node = rb_next(node);
+		if (!node) {
+			if (filled)
+				bitset = 0;
+			break;
+		}
 	}
 	read_unlock_irq(&tree->lock);
 	return bitset;



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