btrfs_delalloc_reserve_metadata
ret = btrfs_delalloc_reserve_metadata(inode, len, len, false);
int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes,
ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode), len, len,
ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode), len, len,
ret = btrfs_delalloc_reserve_metadata(inode, reserve_bytes,
ret = btrfs_delalloc_reserve_metadata(inode, reserved_space,
ret = btrfs_delalloc_reserve_metadata(inode, num_bytes, disk_num_bytes,
ret = btrfs_delalloc_reserve_metadata(inode, blocksize, blocksize, false);
ret = btrfs_delalloc_reserve_metadata(BTRFS_I(inode),