1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate *
4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate * with the License.
8*7c478bd9Sstevel@tonic-gate *
9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate *
14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate *
20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate * Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate */
26*7c478bd9Sstevel@tonic-gate
27*7c478bd9Sstevel@tonic-gate #include <regex.h>
28*7c478bd9Sstevel@tonic-gate #include <devfsadm.h>
29*7c478bd9Sstevel@tonic-gate #include <stdio.h>
30*7c478bd9Sstevel@tonic-gate #include <strings.h>
31*7c478bd9Sstevel@tonic-gate #include <stdlib.h>
32*7c478bd9Sstevel@tonic-gate #include <limits.h>
33*7c478bd9Sstevel@tonic-gate #include <sys/stat.h>
34*7c478bd9Sstevel@tonic-gate #include <sys/mkdev.h>
35*7c478bd9Sstevel@tonic-gate #include <sys/ramdisk.h>
36*7c478bd9Sstevel@tonic-gate
37*7c478bd9Sstevel@tonic-gate static int ramdisk(di_minor_t di_minor, di_node_t node);
38*7c478bd9Sstevel@tonic-gate
39*7c478bd9Sstevel@tonic-gate /*
40*7c478bd9Sstevel@tonic-gate * devfs create callback register
41*7c478bd9Sstevel@tonic-gate */
42*7c478bd9Sstevel@tonic-gate static devfsadm_create_t ramdisk_create_cbt[] = {
43*7c478bd9Sstevel@tonic-gate { "pseudo", "ddi_pseudo", RD_DRIVER_NAME,
44*7c478bd9Sstevel@tonic-gate TYPE_EXACT | DRV_EXACT, ILEVEL_0, ramdisk,
45*7c478bd9Sstevel@tonic-gate },
46*7c478bd9Sstevel@tonic-gate };
47*7c478bd9Sstevel@tonic-gate DEVFSADM_CREATE_INIT_V0(ramdisk_create_cbt);
48*7c478bd9Sstevel@tonic-gate
49*7c478bd9Sstevel@tonic-gate /*
50*7c478bd9Sstevel@tonic-gate * devfs cleanup register
51*7c478bd9Sstevel@tonic-gate */
52*7c478bd9Sstevel@tonic-gate #define RAMDISK_LINK_RE "^r?ramdisk/.+$"
53*7c478bd9Sstevel@tonic-gate
54*7c478bd9Sstevel@tonic-gate static devfsadm_remove_t ramdisk_remove_cbt[] = {
55*7c478bd9Sstevel@tonic-gate { "pseudo", RAMDISK_LINK_RE, RM_ALWAYS | RM_PRE | RM_HOT,
56*7c478bd9Sstevel@tonic-gate ILEVEL_0, devfsadm_rm_all},
57*7c478bd9Sstevel@tonic-gate };
58*7c478bd9Sstevel@tonic-gate DEVFSADM_REMOVE_INIT_V0(ramdisk_remove_cbt);
59*7c478bd9Sstevel@tonic-gate
60*7c478bd9Sstevel@tonic-gate static char *debug_mid = "ramdisk_mid";
61*7c478bd9Sstevel@tonic-gate
62*7c478bd9Sstevel@tonic-gate int
minor_init(void)63*7c478bd9Sstevel@tonic-gate minor_init(void)
64*7c478bd9Sstevel@tonic-gate {
65*7c478bd9Sstevel@tonic-gate devfsadm_print(debug_mid, "ramdisk_link: minor_init\n");
66*7c478bd9Sstevel@tonic-gate return (DEVFSADM_SUCCESS);
67*7c478bd9Sstevel@tonic-gate }
68*7c478bd9Sstevel@tonic-gate
69*7c478bd9Sstevel@tonic-gate int
minor_fini(void)70*7c478bd9Sstevel@tonic-gate minor_fini(void)
71*7c478bd9Sstevel@tonic-gate {
72*7c478bd9Sstevel@tonic-gate devfsadm_print(debug_mid, "ramdisk_link: minor_fini\n");
73*7c478bd9Sstevel@tonic-gate return (DEVFSADM_SUCCESS);
74*7c478bd9Sstevel@tonic-gate }
75*7c478bd9Sstevel@tonic-gate
76*7c478bd9Sstevel@tonic-gate /*
77*7c478bd9Sstevel@tonic-gate * This function is called for every ramdisk minor node.
78*7c478bd9Sstevel@tonic-gate * Calls enumerate to assign a logical ramdisk id, and then
79*7c478bd9Sstevel@tonic-gate * devfsadm_mklink to make the link.
80*7c478bd9Sstevel@tonic-gate *
81*7c478bd9Sstevel@tonic-gate * For pseudo ramdisk devices:
82*7c478bd9Sstevel@tonic-gate *
83*7c478bd9Sstevel@tonic-gate * /dev/ramdiskctl -> /devices/pseudo/ramdisk@0:ctl
84*7c478bd9Sstevel@tonic-gate * /dev/ramdisk/<name> -> /devices/pseudo/ramdisk@0:<name>
85*7c478bd9Sstevel@tonic-gate * /dev/rramdisk/<name> -> /devices/pseudo/ramdisk@0:<name>,raw
86*7c478bd9Sstevel@tonic-gate *
87*7c478bd9Sstevel@tonic-gate * For OBP-created ramdisk devices:
88*7c478bd9Sstevel@tonic-gate *
89*7c478bd9Sstevel@tonic-gate * /dev/ramdisk/<name> -> /devices/ramdisk-<name>:a
90*7c478bd9Sstevel@tonic-gate * /dev/rramdisk/<name> -> /devices/ramdisk-<name>:a,raw
91*7c478bd9Sstevel@tonic-gate */
92*7c478bd9Sstevel@tonic-gate static int
ramdisk(di_minor_t di_minor,di_node_t node)93*7c478bd9Sstevel@tonic-gate ramdisk(di_minor_t di_minor, di_node_t node)
94*7c478bd9Sstevel@tonic-gate {
95*7c478bd9Sstevel@tonic-gate char *name;
96*7c478bd9Sstevel@tonic-gate char devnm[MAXNAMELEN + 1];
97*7c478bd9Sstevel@tonic-gate char path[PATH_MAX];
98*7c478bd9Sstevel@tonic-gate
99*7c478bd9Sstevel@tonic-gate /*
100*7c478bd9Sstevel@tonic-gate * If this is an OBP-created ramdisk use the node name, having first
101*7c478bd9Sstevel@tonic-gate * stripped the "ramdisk-" prefix. For pseudo ramdisks use the minor
102*7c478bd9Sstevel@tonic-gate * name, having first stripped any ",raw" suffix.
103*7c478bd9Sstevel@tonic-gate */
104*7c478bd9Sstevel@tonic-gate if (di_nodeid(node) == DI_PROM_NODEID) {
105*7c478bd9Sstevel@tonic-gate RD_STRIP_PREFIX(name, di_node_name(node));
106*7c478bd9Sstevel@tonic-gate (void) strlcpy(devnm, name, sizeof (devnm));
107*7c478bd9Sstevel@tonic-gate } else {
108*7c478bd9Sstevel@tonic-gate (void) strlcpy(devnm, di_minor_name(di_minor), sizeof (devnm));
109*7c478bd9Sstevel@tonic-gate RD_STRIP_SUFFIX(devnm);
110*7c478bd9Sstevel@tonic-gate }
111*7c478bd9Sstevel@tonic-gate
112*7c478bd9Sstevel@tonic-gate if (strcmp(devnm, RD_CTL_NODE) == 0) {
113*7c478bd9Sstevel@tonic-gate (void) devfsadm_mklink(RD_CTL_NAME, node, di_minor, 0);
114*7c478bd9Sstevel@tonic-gate } else {
115*7c478bd9Sstevel@tonic-gate /*
116*7c478bd9Sstevel@tonic-gate * Make the link in /dev/ramdisk or /dev/rramdisk.
117*7c478bd9Sstevel@tonic-gate */
118*7c478bd9Sstevel@tonic-gate (void) snprintf(path, sizeof (path), "%s/%s",
119*7c478bd9Sstevel@tonic-gate di_minor_spectype(di_minor) == S_IFBLK ?
120*7c478bd9Sstevel@tonic-gate RD_BLOCK_NAME : RD_CHAR_NAME, devnm);
121*7c478bd9Sstevel@tonic-gate (void) devfsadm_mklink(path, node, di_minor, 0);
122*7c478bd9Sstevel@tonic-gate }
123*7c478bd9Sstevel@tonic-gate
124*7c478bd9Sstevel@tonic-gate return (DEVFSADM_CONTINUE);
125*7c478bd9Sstevel@tonic-gate }
126