Btrfs: tweak the inode-map and free extent search starts on cold mount
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index cd40a08..688aa86 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -339,13 +339,30 @@
int total_needed = num_blocks;
int level;
+ path = btrfs_alloc_path();
+ ins->flags = 0;
+ btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY);
+
level = btrfs_header_level(btrfs_buffer_header(root->node));
total_needed += (level + 1) * 3;
+ if (root->fs_info->last_insert.objectid == 0 && search_end == (u64)-1) {
+ struct btrfs_disk_key *last_key;
+ btrfs_init_path(path);
+ ins->objectid = (u64)-1;
+ ins->offset = (u64)-1;
+ ret = btrfs_search_slot(trans, root, ins, path, 0, 0);
+ if (ret < 0)
+ goto error;
+ BUG_ON(ret == 0);
+ if (path->slots[0] > 0)
+ path->slots[0]--;
+ l = btrfs_buffer_leaf(path->nodes[0]);
+ last_key = &l->items[path->slots[0]].key;
+ search_start = btrfs_disk_key_objectid(last_key);
+ }
if (root->fs_info->last_insert.objectid > search_start)
search_start = root->fs_info->last_insert.objectid;
- ins->flags = 0;
- btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY);
path = btrfs_alloc_path();
check_failed: