ntfs_ia_open
ictx->ia_ni = ntfs_ia_open(ictx, ictx->idx_ni);
icx->ia_ni = ntfs_ia_open(icx, icx->idx_ni);
icx->ia_ni = ntfs_ia_open(icx, icx->idx_ni);
ictx->ia_ni = ntfs_ia_open(ictx, ictx->idx_ni);
icx->ia_ni = ntfs_ia_open(icx, ni);
struct ntfs_inode *ntfs_ia_open(struct ntfs_index_context *icx, struct ntfs_inode *ni);