From 8a820b57656c1a062c6445f872a9169fa0d9b381 Mon Sep 17 00:00:00 2001
From: Yingyi Luo <yingyil@google.com>
Date: Fri, 15 Sep 2017 10:49:21 -0700
Subject: btrfs-progs: convert: move link_subvol out of main

link_subvol() is moved to inode.c and renamed as btrfs_mksubvol().
The change cascades down to the callchain.

Signed-off-by: Yingyi Luo <yingyil@google.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 convert/main.c | 126 +--------------------------------------------------------
 1 file changed, 2 insertions(+), 124 deletions(-)

(limited to 'convert/main.c')

diff --git a/convert/main.c b/convert/main.c
index 7ec6202d..0babf0e8 100644
--- a/convert/main.c
+++ b/convert/main.c
@@ -838,129 +838,6 @@ out:
 	return ret;
 }
 
-static struct btrfs_root* link_subvol(struct btrfs_root *root,
-		const char *base, u64 root_objectid)
-{
-	struct btrfs_trans_handle *trans;
-	struct btrfs_fs_info *fs_info = root->fs_info;
-	struct btrfs_root *tree_root = fs_info->tree_root;
-	struct btrfs_root *new_root = NULL;
-	struct btrfs_path path;
-	struct btrfs_inode_item *inode_item;
-	struct extent_buffer *leaf;
-	struct btrfs_key key;
-	u64 dirid = btrfs_root_dirid(&root->root_item);
-	u64 index = 2;
-	char buf[BTRFS_NAME_LEN + 1]; /* for snprintf null */
-	int len;
-	int i;
-	int ret;
-
-	len = strlen(base);
-	if (len == 0 || len > BTRFS_NAME_LEN)
-		return NULL;
-
-	btrfs_init_path(&path);
-	key.objectid = dirid;
-	key.type = BTRFS_DIR_INDEX_KEY;
-	key.offset = (u64)-1;
-
-	ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
-	if (ret <= 0) {
-		error("search for DIR_INDEX dirid %llu failed: %d",
-				(unsigned long long)dirid, ret);
-		goto fail;
-	}
-
-	if (path.slots[0] > 0) {
-		path.slots[0]--;
-		btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]);
-		if (key.objectid == dirid && key.type == BTRFS_DIR_INDEX_KEY)
-			index = key.offset + 1;
-	}
-	btrfs_release_path(&path);
-
-	trans = btrfs_start_transaction(root, 1);
-	if (IS_ERR(trans)) {
-		error("unable to start transaction");
-		goto fail;
-	}
-
-	key.objectid = dirid;
-	key.offset = 0;
-	key.type =  BTRFS_INODE_ITEM_KEY;
-
-	ret = btrfs_lookup_inode(trans, root, &path, &key, 1);
-	if (ret) {
-		error("search for INODE_ITEM %llu failed: %d",
-				(unsigned long long)dirid, ret);
-		goto fail;
-	}
-	leaf = path.nodes[0];
-	inode_item = btrfs_item_ptr(leaf, path.slots[0],
-				    struct btrfs_inode_item);
-
-	key.objectid = root_objectid;
-	key.offset = (u64)-1;
-	key.type = BTRFS_ROOT_ITEM_KEY;
-
-	memcpy(buf, base, len);
-	for (i = 0; i < 1024; i++) {
-		ret = btrfs_insert_dir_item(trans, root, buf, len,
-					    dirid, &key, BTRFS_FT_DIR, index);
-		if (ret != -EEXIST)
-			break;
-		len = snprintf(buf, ARRAY_SIZE(buf), "%s%d", base, i);
-		if (len < 1 || len > BTRFS_NAME_LEN) {
-			ret = -EINVAL;
-			break;
-		}
-	}
-	if (ret)
-		goto fail;
-
-	btrfs_set_inode_size(leaf, inode_item, len * 2 +
-			     btrfs_inode_size(leaf, inode_item));
-	btrfs_mark_buffer_dirty(leaf);
-	btrfs_release_path(&path);
-
-	/* add the backref first */
-	ret = btrfs_add_root_ref(trans, tree_root, root_objectid,
-				 BTRFS_ROOT_BACKREF_KEY,
-				 root->root_key.objectid,
-				 dirid, index, buf, len);
-	if (ret) {
-		error("unable to add root backref for %llu: %d",
-				root->root_key.objectid, ret);
-		goto fail;
-	}
-
-	/* now add the forward ref */
-	ret = btrfs_add_root_ref(trans, tree_root, root->root_key.objectid,
-				 BTRFS_ROOT_REF_KEY, root_objectid,
-				 dirid, index, buf, len);
-	if (ret) {
-		error("unable to add root ref for %llu: %d",
-				root->root_key.objectid, ret);
-		goto fail;
-	}
-
-	ret = btrfs_commit_transaction(trans, root);
-	if (ret) {
-		error("transaction commit failed: %d", ret);
-		goto fail;
-	}
-
-	new_root = btrfs_read_fs_root(fs_info, &key);
-	if (IS_ERR(new_root)) {
-		error("unable to fs read root: %lu", PTR_ERR(new_root));
-		new_root = NULL;
-	}
-fail:
-	btrfs_init_path(&path);
-	return new_root;
-}
-
 static int create_subvol(struct btrfs_trans_handle *trans,
 			 struct btrfs_root *root, u64 root_objectid)
 {
@@ -1319,7 +1196,8 @@ static int do_convert(const char *devname, u32 convert_flags, u32 nodesize,
 		task_deinit(ctx.info);
 	}
 
-	image_root = link_subvol(root, subvol_name, CONV_IMAGE_SUBVOL_OBJECTID);
+	image_root = btrfs_mksubvol(root, subvol_name,
+				    CONV_IMAGE_SUBVOL_OBJECTID);
 	if (!image_root) {
 		error("unable to link subvolume %s", subvol_name);
 		goto fail;
-- 
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