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 (c) 1998-1999,2001 by Sun Microsystems, Inc. 24 * All rights reserved. 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/mkdev.h> 36 #include <sys/lofi.h> 37 38 39 static int lofi(di_minor_t minor, di_node_t node); 40 41 /* 42 * devfs create callback register 43 */ 44 static devfsadm_create_t lofi_create_cbt[] = { 45 { "pseudo", "ddi_pseudo", LOFI_DRIVER_NAME, 46 TYPE_EXACT | DRV_EXACT, ILEVEL_0, lofi, 47 }, 48 }; 49 DEVFSADM_CREATE_INIT_V0(lofi_create_cbt); 50 51 /* 52 * devfs cleanup register 53 */ 54 static devfsadm_remove_t lofi_remove_cbt[] = { 55 {"pseudo", "^r?lofi/[0-9]+$", RM_ALWAYS | RM_PRE | RM_HOT, 56 ILEVEL_0, devfsadm_rm_all}, 57 }; 58 DEVFSADM_REMOVE_INIT_V0(lofi_remove_cbt); 59 60 61 /* 62 * For the master device: 63 * /dev/lofictl -> /devices/pseudo/lofi@0:ctl 64 * For each other device 65 * /dev/lofi/1 -> /devices/pseudo/lofi@0:1 66 * /dev/rlofi/1 -> /devices/pseudo/lofi@0:1,raw 67 */ 68 static int 69 lofi(di_minor_t minor, di_node_t node) 70 { 71 dev_t dev; 72 char mn[MAXNAMELEN + 1]; 73 char blkname[MAXNAMELEN + 1]; 74 char rawname[MAXNAMELEN + 1]; 75 char path[PATH_MAX + 1]; 76 77 (void) strcpy(mn, di_minor_name(minor)); 78 79 if (strcmp(mn, "ctl") == 0) { 80 (void) devfsadm_mklink(LOFI_CTL_NAME, node, minor, 0); 81 } else { 82 dev = di_minor_devt(minor); 83 (void) snprintf(blkname, sizeof (blkname), "%d", 84 (int)minor(dev)); 85 (void) snprintf(rawname, sizeof (rawname), "%d,raw", 86 (int)minor(dev)); 87 88 if (strcmp(mn, blkname) == 0) { 89 (void) snprintf(path, sizeof (path), "%s/%s", 90 LOFI_BLOCK_NAME, blkname); 91 } else if (strcmp(mn, rawname) == 0) { 92 (void) snprintf(path, sizeof (path), "%s/%s", 93 LOFI_CHAR_NAME, blkname); 94 } else { 95 return (DEVFSADM_CONTINUE); 96 } 97 98 (void) devfsadm_mklink(path, node, minor, 0); 99 } 100 return (DEVFSADM_CONTINUE); 101 } 102