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From: Qu Wenruo <wqu@suse.com>
To: linux-btrfs@vger.kernel.org
Subject: [PATCH v2 1/5] btrfs-progs: Export btrfs_create_tree() and move it to disk-io.c
Date: Thu,  3 Jan 2019 15:32:17 +0800	[thread overview]
Message-ID: <20190103073221.10525-2-wqu@suse.com> (raw)
In-Reply-To: <20190103073221.10525-1-wqu@suse.com>

Just as how kernel uses it.

This provides the basis for later uuid creation.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 disk-io.c         | 72 +++++++++++++++++++++++++++++++++++++++++++++++
 disk-io.h         |  4 ++-
 free-space-tree.c | 72 -----------------------------------------------
 3 files changed, 75 insertions(+), 73 deletions(-)

diff --git a/disk-io.c b/disk-io.c
index 5fafa144c0d3..0668031b974b 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -1723,3 +1723,75 @@ int btrfs_set_buffer_uptodate(struct extent_buffer *eb)
 {
 	return set_extent_buffer_uptodate(eb);
 }
+
+struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
+				     struct btrfs_fs_info *fs_info,
+				     u64 objectid)
+{
+	struct extent_buffer *leaf;
+	struct btrfs_root *tree_root = fs_info->tree_root;
+	struct btrfs_root *root;
+	struct btrfs_key key;
+	int ret = 0;
+
+	root = kzalloc(sizeof(*root), GFP_KERNEL);
+	if (!root)
+		return ERR_PTR(-ENOMEM);
+
+	btrfs_setup_root(root, fs_info, objectid);
+	root->root_key.objectid = objectid;
+	root->root_key.type = BTRFS_ROOT_ITEM_KEY;
+	root->root_key.offset = 0;
+
+	leaf = btrfs_alloc_free_block(trans, root, fs_info->nodesize, objectid,
+			NULL, 0, 0, 0);
+	if (IS_ERR(leaf)) {
+		ret = PTR_ERR(leaf);
+		leaf = NULL;
+		goto fail;
+	}
+
+	memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header));
+	btrfs_set_header_bytenr(leaf, leaf->start);
+	btrfs_set_header_generation(leaf, trans->transid);
+	btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV);
+	btrfs_set_header_owner(leaf, objectid);
+	root->node = leaf;
+	write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE);
+	write_extent_buffer(leaf, fs_info->chunk_tree_uuid,
+			    btrfs_header_chunk_tree_uuid(leaf),
+			    BTRFS_UUID_SIZE);
+	btrfs_mark_buffer_dirty(leaf);
+
+	extent_buffer_get(root->node);
+	root->commit_root = root->node;
+	root->track_dirty = 1;
+
+	root->root_item.flags = 0;
+	root->root_item.byte_limit = 0;
+	btrfs_set_root_bytenr(&root->root_item, leaf->start);
+	btrfs_set_root_generation(&root->root_item, trans->transid);
+	btrfs_set_root_level(&root->root_item, 0);
+	btrfs_set_root_refs(&root->root_item, 1);
+	btrfs_set_root_used(&root->root_item, leaf->len);
+	btrfs_set_root_last_snapshot(&root->root_item, 0);
+	btrfs_set_root_dirid(&root->root_item, 0);
+	memset(root->root_item.uuid, 0, BTRFS_UUID_SIZE);
+	root->root_item.drop_level = 0;
+
+	key.objectid = objectid;
+	key.type = BTRFS_ROOT_ITEM_KEY;
+	key.offset = 0;
+	ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item);
+	if (ret)
+		goto fail;
+
+	return root;
+
+fail:
+	if (leaf)
+		free_extent_buffer(leaf);
+
+	kfree(root);
+	return ERR_PTR(ret);
+}
diff --git a/disk-io.h b/disk-io.h
index 05cbbce6ea4a..c4a6a020dd88 100644
--- a/disk-io.h
+++ b/disk-io.h
@@ -197,5 +197,7 @@ int write_tree_block(struct btrfs_trans_handle *trans,
 		     struct btrfs_fs_info *fs_info,
 		     struct extent_buffer *eb);
 int write_and_map_eb(struct btrfs_fs_info *fs_info, struct extent_buffer *eb);
-
+struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
+				     struct btrfs_fs_info *fs_info,
+				     u64 objectid);
 #endif
diff --git a/free-space-tree.c b/free-space-tree.c
index 6ef57928f1a9..5089fef0652c 100644
--- a/free-space-tree.c
+++ b/free-space-tree.c
@@ -1420,78 +1420,6 @@ out:
 	return ret;
 }
 
-static struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
-				     struct btrfs_fs_info *fs_info,
-				     u64 objectid)
-{
-	struct extent_buffer *leaf;
-	struct btrfs_root *tree_root = fs_info->tree_root;
-	struct btrfs_root *root;
-	struct btrfs_key key;
-	int ret = 0;
-
-	root = kzalloc(sizeof(*root), GFP_KERNEL);
-	if (!root)
-		return ERR_PTR(-ENOMEM);
-
-	btrfs_setup_root(root, fs_info, objectid);
-	root->root_key.objectid = objectid;
-	root->root_key.type = BTRFS_ROOT_ITEM_KEY;
-	root->root_key.offset = 0;
-
-	leaf = btrfs_alloc_free_block(trans, root, fs_info->nodesize, objectid,
-			NULL, 0, 0, 0);
-	if (IS_ERR(leaf)) {
-		ret = PTR_ERR(leaf);
-		leaf = NULL;
-		goto fail;
-	}
-
-	memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header));
-	btrfs_set_header_bytenr(leaf, leaf->start);
-	btrfs_set_header_generation(leaf, trans->transid);
-	btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV);
-	btrfs_set_header_owner(leaf, objectid);
-	root->node = leaf;
-	write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE);
-	write_extent_buffer(leaf, fs_info->chunk_tree_uuid,
-			    btrfs_header_chunk_tree_uuid(leaf),
-			    BTRFS_UUID_SIZE);
-	btrfs_mark_buffer_dirty(leaf);
-
-	extent_buffer_get(root->node);
-	root->commit_root = root->node;
-	root->track_dirty = 1;
-
-	root->root_item.flags = 0;
-	root->root_item.byte_limit = 0;
-	btrfs_set_root_bytenr(&root->root_item, leaf->start);
-	btrfs_set_root_generation(&root->root_item, trans->transid);
-	btrfs_set_root_level(&root->root_item, 0);
-	btrfs_set_root_refs(&root->root_item, 1);
-	btrfs_set_root_used(&root->root_item, leaf->len);
-	btrfs_set_root_last_snapshot(&root->root_item, 0);
-	btrfs_set_root_dirid(&root->root_item, 0);
-	memset(root->root_item.uuid, 0, BTRFS_UUID_SIZE);
-	root->root_item.drop_level = 0;
-
-	key.objectid = objectid;
-	key.type = BTRFS_ROOT_ITEM_KEY;
-	key.offset = 0;
-	ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item);
-	if (ret)
-		goto fail;
-
-	return root;
-
-fail:
-	if (leaf)
-		free_extent_buffer(leaf);
-
-	kfree(root);
-	return ERR_PTR(ret);
-}
-
 #define btrfs_set_fs_compat_ro(__fs_info, opt) \
 	__btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
 
-- 
2.20.1


  reply	other threads:[~2019-01-03  7:32 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-03  7:32 [PATCH v2 0/5] Fix incorrectly created uuid tree Qu Wenruo
2019-01-03  7:32 ` Qu Wenruo [this message]
2019-01-03  7:32 ` [PATCH v2 2/5] btrfs-progs: mkfs: Create data reloc tree from scratch Qu Wenruo
2019-01-03  7:32 ` [PATCH v2 3/5] btrfs-progs: uuid: Port kernel btrfs_uuid_tree_lookup() Qu Wenruo
2019-01-03  7:32 ` [PATCH v2 4/5] btrfs-progs: uuid: Port btrfs_uuid_tree_add() function Qu Wenruo
2019-01-03  7:32 ` [PATCH v2 5/5] btrfs-progs: Create uuid tree with proper contents Qu Wenruo
2019-01-10 21:04 ` [PATCH v2 0/5] Fix incorrectly created uuid tree David Sterba

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