1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include <regex.h>
30*0Sstevel@tonic-gate #include <devfsadm.h>
31*0Sstevel@tonic-gate #include <stdio.h>
32*0Sstevel@tonic-gate #include <strings.h>
33*0Sstevel@tonic-gate #include <stdlib.h>
34*0Sstevel@tonic-gate #include <limits.h>
35*0Sstevel@tonic-gate #include <sys/stat.h>
36*0Sstevel@tonic-gate #include <sys/mkdev.h>
37*0Sstevel@tonic-gate #include <sys/ramdisk.h>
38*0Sstevel@tonic-gate
39*0Sstevel@tonic-gate static int ramdisk(di_minor_t di_minor, di_node_t node);
40*0Sstevel@tonic-gate
41*0Sstevel@tonic-gate /*
42*0Sstevel@tonic-gate * devfs create callback register
43*0Sstevel@tonic-gate */
44*0Sstevel@tonic-gate static devfsadm_create_t ramdisk_create_cbt[] = {
45*0Sstevel@tonic-gate { "pseudo", "ddi_pseudo", RD_DRIVER_NAME,
46*0Sstevel@tonic-gate TYPE_EXACT | DRV_EXACT, ILEVEL_0, ramdisk,
47*0Sstevel@tonic-gate },
48*0Sstevel@tonic-gate };
49*0Sstevel@tonic-gate DEVFSADM_CREATE_INIT_V0(ramdisk_create_cbt);
50*0Sstevel@tonic-gate
51*0Sstevel@tonic-gate /*
52*0Sstevel@tonic-gate * devfs cleanup register
53*0Sstevel@tonic-gate */
54*0Sstevel@tonic-gate #define RAMDISK_LINK_RE "^r?ramdisk/.+$"
55*0Sstevel@tonic-gate
56*0Sstevel@tonic-gate static devfsadm_remove_t ramdisk_remove_cbt[] = {
57*0Sstevel@tonic-gate { "pseudo", RAMDISK_LINK_RE, RM_ALWAYS | RM_PRE | RM_HOT,
58*0Sstevel@tonic-gate ILEVEL_0, devfsadm_rm_all},
59*0Sstevel@tonic-gate };
60*0Sstevel@tonic-gate DEVFSADM_REMOVE_INIT_V0(ramdisk_remove_cbt);
61*0Sstevel@tonic-gate
62*0Sstevel@tonic-gate static char *debug_mid = "ramdisk_mid";
63*0Sstevel@tonic-gate
64*0Sstevel@tonic-gate int
minor_init(void)65*0Sstevel@tonic-gate minor_init(void)
66*0Sstevel@tonic-gate {
67*0Sstevel@tonic-gate devfsadm_print(debug_mid, "ramdisk_link: minor_init\n");
68*0Sstevel@tonic-gate return (DEVFSADM_SUCCESS);
69*0Sstevel@tonic-gate }
70*0Sstevel@tonic-gate
71*0Sstevel@tonic-gate int
minor_fini(void)72*0Sstevel@tonic-gate minor_fini(void)
73*0Sstevel@tonic-gate {
74*0Sstevel@tonic-gate devfsadm_print(debug_mid, "ramdisk_link: minor_fini\n");
75*0Sstevel@tonic-gate return (DEVFSADM_SUCCESS);
76*0Sstevel@tonic-gate }
77*0Sstevel@tonic-gate
78*0Sstevel@tonic-gate /*
79*0Sstevel@tonic-gate * This function is called for every ramdisk minor node.
80*0Sstevel@tonic-gate * Calls enumerate to assign a logical ramdisk id, and then
81*0Sstevel@tonic-gate * devfsadm_mklink to make the link.
82*0Sstevel@tonic-gate *
83*0Sstevel@tonic-gate * For pseudo ramdisk devices:
84*0Sstevel@tonic-gate *
85*0Sstevel@tonic-gate * /dev/ramdiskctl -> /devices/pseudo/ramdisk@0:ctl
86*0Sstevel@tonic-gate * /dev/ramdisk/<name> -> /devices/pseudo/ramdisk@0:<name>
87*0Sstevel@tonic-gate * /dev/rramdisk/<name> -> /devices/pseudo/ramdisk@0:<name>,raw
88*0Sstevel@tonic-gate *
89*0Sstevel@tonic-gate * For OBP-created ramdisk devices:
90*0Sstevel@tonic-gate *
91*0Sstevel@tonic-gate * /dev/ramdisk/<name> -> /devices/ramdisk-<name>:a
92*0Sstevel@tonic-gate * /dev/rramdisk/<name> -> /devices/ramdisk-<name>:a,raw
93*0Sstevel@tonic-gate */
94*0Sstevel@tonic-gate static int
ramdisk(di_minor_t di_minor,di_node_t node)95*0Sstevel@tonic-gate ramdisk(di_minor_t di_minor, di_node_t node)
96*0Sstevel@tonic-gate {
97*0Sstevel@tonic-gate char *name;
98*0Sstevel@tonic-gate char devnm[MAXNAMELEN + 1];
99*0Sstevel@tonic-gate char path[PATH_MAX];
100*0Sstevel@tonic-gate
101*0Sstevel@tonic-gate /*
102*0Sstevel@tonic-gate * If this is an OBP-created ramdisk use the node name, having first
103*0Sstevel@tonic-gate * stripped the "ramdisk-" prefix. For pseudo ramdisks use the minor
104*0Sstevel@tonic-gate * name, having first stripped any ",raw" suffix.
105*0Sstevel@tonic-gate */
106*0Sstevel@tonic-gate if (di_nodeid(node) == DI_PROM_NODEID) {
107*0Sstevel@tonic-gate RD_STRIP_PREFIX(name, di_node_name(node));
108*0Sstevel@tonic-gate (void) strlcpy(devnm, name, sizeof (devnm));
109*0Sstevel@tonic-gate } else {
110*0Sstevel@tonic-gate (void) strlcpy(devnm, di_minor_name(di_minor), sizeof (devnm));
111*0Sstevel@tonic-gate RD_STRIP_SUFFIX(devnm);
112*0Sstevel@tonic-gate }
113*0Sstevel@tonic-gate
114*0Sstevel@tonic-gate if (strcmp(devnm, RD_CTL_NODE) == 0) {
115*0Sstevel@tonic-gate (void) devfsadm_mklink(RD_CTL_NAME, node, di_minor, 0);
116*0Sstevel@tonic-gate } else {
117*0Sstevel@tonic-gate /*
118*0Sstevel@tonic-gate * Make the link in /dev/ramdisk or /dev/rramdisk.
119*0Sstevel@tonic-gate */
120*0Sstevel@tonic-gate (void) snprintf(path, sizeof (path), "%s/%s",
121*0Sstevel@tonic-gate di_minor_spectype(di_minor) == S_IFBLK ?
122*0Sstevel@tonic-gate RD_BLOCK_NAME : RD_CHAR_NAME, devnm);
123*0Sstevel@tonic-gate (void) devfsadm_mklink(path, node, di_minor, 0);
124*0Sstevel@tonic-gate }
125*0Sstevel@tonic-gate
126*0Sstevel@tonic-gate return (DEVFSADM_CONTINUE);
127*0Sstevel@tonic-gate }
128