smbfs_findnext
error = smbfs_findnext(ctx, offset - np->n_dirofs, &scred);
error = smbfs_findnext(ctx, uio->uio_resid / _DIRENT_RECLEN(255) + 1, &scred);
error = smbfs_findnext(ctx, 1, scred);
int smbfs_findnext(struct smbfs_fctx *ctx, int limit, struct smb_cred *scred);