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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 2005 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>
#include <sys/fs/zfs.h>
/* zfs and zvol name info */
#define ZVOL_LINK_RE_DEVICES "zvol/r?dsk/.*/.*$"
static int zfs(di_minor_t minor, di_node_t node);
/*
* devfs create callback register
*/
static devfsadm_create_t zfs_create_cbt[] = {
{ "pseudo", "ddi_pseudo", ZFS_DRIVER,
TYPE_EXACT | DRV_EXACT, ILEVEL_0, zfs,
},
};
DEVFSADM_CREATE_INIT_V0(zfs_create_cbt);
/*
* devfs cleanup register
*/
static devfsadm_remove_t zfs_remove_cbt[] = {
{ "pseudo", ZVOL_LINK_RE_DEVICES, RM_HOT | RM_POST,
ILEVEL_0, devfsadm_rm_all },
};
DEVFSADM_REMOVE_INIT_V0(zfs_remove_cbt);
/*
* For the zfs control node:
* /dev/zfs -> /devices/pseudo/zfs@0:zfs
* For zvols:
* /dev/zvol/dsk/<pool>/<dataset> -> /devices/pseudo/zfs@0:1
* /dev/zvol/rdsk/<pool>/<dataset> -> /devices/pseudo/zfs@0:1,raw
*/
static int
zfs(di_minor_t minor, di_node_t node)
{
dev_t dev;
int err;
char mn[MAXNAMELEN + 1];
char blkname[MAXNAMELEN + 1];
char rawname[MAXNAMELEN + 1];
char path[PATH_MAX + 1];
char *name;
(void) strcpy(mn, di_minor_name(minor));
if (strcmp(mn, ZFS_DRIVER) == 0) {
(void) devfsadm_mklink(ZFS_DRIVER, node, minor, 0);
} else {
dev = di_minor_devt(minor);
err = di_prop_lookup_strings(dev, node, ZVOL_PROP_NAME, &name);
if (err < 0) {
/* property not defined so can't do anything */
return (DEVFSADM_CONTINUE);
}
(void) snprintf(blkname, sizeof (blkname), "%dc",
(int)minor(dev));
(void) snprintf(rawname, sizeof (rawname), "%dc,raw",
(int)minor(dev));
/*
* This is where the actual public name gets constructed.
* Change the snprintf format to change the public
* path that gets constructed.
*/
if (strcmp(mn, blkname) == 0) {
(void) snprintf(path, sizeof (path), "%s/%s",
ZVOL_DEV_DIR, name);
} else if (strcmp(mn, rawname) == 0) {
(void) snprintf(path, sizeof (path), "%s/%s",
ZVOL_RDEV_DIR, name);
} else {
return (DEVFSADM_CONTINUE);
}
(void) devfsadm_mklink(path, node, minor, 0);
}
return (DEVFSADM_CONTINUE);
}
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