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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <regex.h>
#include <devfsadm.h>
#include <stdio.h>
#include <strings.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/mkdev.h>
#define MD_LINK_RE_DEVICES "^md/r?dsk/d[0-9]+$"
#define MD_LINK_RE_SHARED "^md/shared/[0-9]+/r?dsk/d[0-9]+$"
#define MD_LINK_RE_ADMIN "^md/admin"
/*
* The devfsadm link module require the next section to
* be defined in order to know what and when to call functions
* in the module on device creation and removal.
*/
/* setup for device creation */
static int md_create(di_minor_t minor, di_node_t node);
static devfsadm_create_t md_cbt[] = {
{ "pseudo", "ddi_pseudo", "md",
TYPE_EXACT | DRV_EXACT, ILEVEL_0, md_create,
},
};
DEVFSADM_CREATE_INIT_V0(md_cbt);
/*
* remove devices - always allow disks to be dynamically removed. Only allow
* admin device to be removed at reboot.
*/
static devfsadm_remove_t md_remove_cbt[] = {
{"pseudo", MD_LINK_RE_DEVICES, RM_ALWAYS | RM_PRE | RM_HOT,
ILEVEL_0, devfsadm_rm_all},
{"pseudo", MD_LINK_RE_SHARED, RM_ALWAYS | RM_PRE | RM_HOT,
ILEVEL_0, devfsadm_rm_all},
{"pseudo", MD_LINK_RE_ADMIN, RM_ALWAYS | RM_PRE,
ILEVEL_0, devfsadm_rm_all},
};
DEVFSADM_REMOVE_INIT_V0(md_remove_cbt);
/*
* For the admin device:
* /dev/md/admin -> /devices/pseudo/md@0:admin
*
* For each other device
* /dev/md/dsk/dN -> /devices/pseudo/md@0:0,N,blk
* /dev/md/rdsk/dN -> /devices/pseudo/md@0:0,N,raw
* /dev/md/shared/M/dsk/dN /devices/pseudo/md@0:M,N,blk
* /dev/md/shared/M/rdsk/dN /devices/pseudo/md@0:M,N,raw
*/
static int
md_create(di_minor_t minor, di_node_t node)
{
char mn[MAXNAMELEN + 1];
char path[PATH_MAX + 1];
int set = -1, mdev = -1, ret;
char *type, *dir;
(void) strcpy(mn, di_minor_name(minor));
/*
* Check whether we are being requested to setup the admin
* device link or one of the metadevice links. They need
* to be treated differently.
*/
if (strcmp(mn, "admin") == 0) {
/* there is only one admin link and always in /dev/md/admin */
(void) devfsadm_mklink("md/admin", node, minor, 0);
} else {
/*
* Extract out the minor components and create the
* appropriate links. The node looks like:
* md@<set>,<mdev>,<type>
* where the <set> number is the named diskset,
* <mdev> is the metadevice number, and <type>
* is the trailing "blk" or "raw" indication.
*
* NOTE: when <set> is non-zero, we need to create
* under the "shared" directory entry instead of linking
* into the top level dsk/rdsk directories.
*/
ret = sscanf(mn, "%d,%d,", &set, &mdev);
if (ret == 2 && (type = strrchr(mn, ',')) != NULL) {
type ++;
if (strcmp(type, "blk") == 0) {
dir = "dsk";
} else {
dir = "rdsk";
}
if (set == 0) {
/* this is a simple md */
(void) snprintf(path, sizeof (path),
"md/%s/d%d", dir, mdev);
} else {
/* this is a shared md */
(void) snprintf(path, sizeof (path),
"md/shared/%d/%s/d%d",
set, dir, mdev);
}
(void) devfsadm_mklink(path, node, minor, 0);
}
}
return (DEVFSADM_CONTINUE);
}
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