da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * CDDL HEADER START
3e14f97f673e8a630f076077de35afdd43dc1587Roger A. Faulkner * The contents of this file are subject to the terms of the
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * Common Development and Distribution License (the "License").
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * You may not use this file except in compliance with the License.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * See the License for the specific language governing permissions
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * and limitations under the License.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * When distributing Covered Code, include this CDDL HEADER in each
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * If applicable, add the following below this CDDL HEADER, with the
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * fields enclosed by brackets "[]" replaced with your own identifying
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * information: Portions Copyright [yyyy] [name of copyright owner]
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * CDDL HEADER END
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * Use is subject to license terms.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#pragma ident "%Z%%M% %I% %E% SMI"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * This file contains interfaces to translate <driver><instance><minorname>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * information into /devices and /dev paths. It does this using interfaces to
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * the kernel instance tree so that it can provide translations for devices
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * which are no longer present. An example consumer of these interfaces is
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * iostat(1M) - which shows, in its first iteration, activity since reboot.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * With persistant kstats, a device which was busy a long time ago can still
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * have a decaying presence in iostat output, and that output, when '-n' is
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * used, should show the public name.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chintypedef struct {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/*ARGSUSED*/
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chindi_dim_path_devices(di_dim_t dim, char *drv_name, int instance,
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* convert drv_name to major_t */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (modctl(MODGETMAJBIND, drv_name, strlen(drv_name) + 1, &major) < 0)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* find the length of the devices path given major,instance */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (modctl(MODGETDEVFSPATH_MI_LEN, major, instance, &len) != 0)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * MODGETDEVFSPATH_MI_LEN result includes '\0' termination, but we
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * may need to add space for ":<minor_name>"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (modctl(MODGETDEVFSPATH_MI, major, instance, len, devices) != 0) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* add ':<minot_name>' to the end of /devices path */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* di_dim_path_dev di_devlink callback */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chindi_dim_path_dev(di_dim_t dim, char *drv_name, int instance, char *minor_name)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* we must have a minor_name to resolve to a public name */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* convert <driver><instance><minor_name> to /devices path */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin devices = di_dim_path_devices(dim, drv_name, instance, minor_name);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* convert /devices path to /dev path */