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btrfs: block-group: refactor how we insert a block group item

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Currently the block group item insert is pretty straight forward, fill
the block group item structure and insert it into extent tree.

However the incoming skinny block group feature is going to change this,
so this patch will refactor insertion into a new function,
insert_block_group_item(), to make the incoming feature easier to add.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2020-05-05 07:58:22 +08:00 committed by David Sterba
parent 7357623a7f
commit 97f4728af8
1 changed files with 25 additions and 16 deletions

41
fs/btrfs/block-group.c
View File

@ -2071,13 +2071,32 @@ error:
return ret;
}
static int insert_block_group_item(struct btrfs_trans_handle *trans,
struct btrfs_block_group *block_group)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_block_group_item bgi;
struct btrfs_root *root;
struct btrfs_key key;
spin_lock(&block_group->lock);
btrfs_set_stack_block_group_used(&bgi, block_group->used);
btrfs_set_stack_block_group_chunk_objectid(&bgi,
BTRFS_FIRST_CHUNK_TREE_OBJECTID);
btrfs_set_stack_block_group_flags(&bgi, block_group->flags);
key.objectid = block_group->start;
key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
key.offset = block_group->length;
spin_unlock(&block_group->lock);
root = fs_info->extent_root;
return btrfs_insert_item(trans, root, &key, &bgi, sizeof(bgi));
}
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_block_group *block_group;
struct btrfs_root *extent_root = fs_info->extent_root;
struct btrfs_block_group_item item;
struct btrfs_key key;
int ret = 0;
if (!trans->can_flush_pending_bgs)
@ -2090,21 +2109,11 @@ void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans)
if (ret)
goto next;
spin_lock(&block_group->lock);
btrfs_set_stack_block_group_used(&item, block_group->used);
btrfs_set_stack_block_group_chunk_objectid(&item,
BTRFS_FIRST_CHUNK_TREE_OBJECTID);
btrfs_set_stack_block_group_flags(&item, block_group->flags);
key.objectid = block_group->start;
key.type = BTRFS_BLOCK_GROUP_ITEM_KEY;
key.offset = block_group->length;
spin_unlock(&block_group->lock);
ret = btrfs_insert_item(trans, extent_root, &key, &item,
sizeof(item));
ret = insert_block_group_item(trans, block_group);
if (ret)
btrfs_abort_transaction(trans, ret);
ret = btrfs_finish_chunk_alloc(trans, key.objectid, key.offset);
ret = btrfs_finish_chunk_alloc(trans, block_group->start,
block_group->length);
if (ret)
btrfs_abort_transaction(trans, ret);
add_block_group_free_space(trans, block_group);