ntfs_cluster_alloc
rlc = ntfs_cluster_alloc(vol, alloc_vcn, need,
rlc = ntfs_cluster_alloc(vol, from_vcn, need,
rl = ntfs_cluster_alloc(vol, 0, new_allocated_size >>
rl = ntfs_cluster_alloc(vol, na->allocated_size >>
extern runlist *ntfs_cluster_alloc(ntfs_volume *vol, VCN start_vcn, s64 count,
rl2 = ntfs_cluster_alloc(vol, old_last_vcn, nr, lcn, MFT_ZONE);
rl2 = ntfs_cluster_alloc(vol, rl[1].vcn, 1, lcn, DATA_ZONE);