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