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 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 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 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