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Btrfs: cleanup the similar code of the fs root read

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There are several functions whose code is similar, such as
  btrfs_find_last_root()
  btrfs_read_fs_root_no_radix()

Besides that, some functions are invoked twice, it is unnecessary,
for example, we are sure that all roots which is found in
  btrfs_find_orphan_roots()
have their orphan items, so it is unnecessary to check the orphan
item again.

So cleanup it.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Miao Xie
2013-05-15 07:48:19 +00:00
committed by Josef Bacik
parent babbf170c7
commit cb517eabba
9 changed files with 231 additions and 272 deletions
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6
fs/btrfs/extent-tree.c
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@@ -7447,8 +7447,8 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
}
if (root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID) {
ret = btrfs_find_last_root(tree_root, root->root_key.objectid,
NULL, NULL);
ret = btrfs_find_root(tree_root, &root->root_key, path,
NULL, NULL);
if (ret < 0) {
btrfs_abort_transaction(trans, tree_root, ret);
err = ret;
@@ -7465,7 +7465,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
}
if (root->in_radix) {
btrfs_free_fs_root(tree_root->fs_info, root);
btrfs_drop_and_free_fs_root(tree_root->fs_info, root);
} else {
free_extent_buffer(root->node);
free_extent_buffer(root->commit_root);