Btrfs: extent fixes
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/mkfs.c b/fs/btrfs/mkfs.c
index bab98c6..584aba4 100644
--- a/fs/btrfs/mkfs.c
+++ b/fs/btrfs/mkfs.c
@@ -18,12 +18,13 @@
struct extent_item extent_item;
int ret;
+ /* setup the super block area */
memset(info, 0, sizeof(info));
info[0].blocknr = 16;
info[0].objectid = 1;
info[0].tree_root = 17;
info[0].alloc_extent.blocknr = 0;
- info[0].alloc_extent.num_blocks = 20;
+ info[0].alloc_extent.num_blocks = 64;
/* 0-17 are used (inclusive) */
info[0].alloc_extent.num_used = 18;
@@ -31,12 +32,14 @@
info[1].objectid = 2;
info[1].tree_root = 64;
info[1].alloc_extent.blocknr = 64;
- info[1].alloc_extent.num_blocks = 8;
+ info[1].alloc_extent.num_blocks = 64;
info[1].alloc_extent.num_used = 1;
ret = pwrite(fd, info, sizeof(info),
CTREE_SUPER_INFO_OFFSET(CTREE_BLOCKSIZE));
if (ret != sizeof(info))
return -1;
+
+ /* create leaves for the tree root and extent root */
memset(&empty_leaf, 0, sizeof(empty_leaf));
empty_leaf.header.parentid = 1;
empty_leaf.header.blocknr = 17;