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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <regex.h> 29 #include <devfsadm.h> 30 #include <stdio.h> 31 #include <strings.h> 32 #include <stdlib.h> 33 #include <limits.h> 34 #include <sys/mkdev.h> 35 #include <sys/lofi.h> 36 37 38 static int lofi(di_minor_t minor, di_node_t node); 39 static int lofi_rm_all(char *link); 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_V1_t lofi_remove_cbt[] = { 55 {"pseudo", "^r?lofi/[0-9]+$", RM_ALWAYS | RM_PRE | RM_HOT, 56 ILEVEL_0, lofi_rm_all}, 57 }; 58 DEVFSADM_REMOVE_INIT_V1(lofi_remove_cbt); 59 60 /* 61 * Wrapper around devfsadm_rm_all() that allows termination of remove 62 * process 63 */ 64 static int 65 lofi_rm_all(char *link) 66 { 67 devfsadm_rm_all(link); 68 return (DEVFSADM_TERMINATE); 69 } 70 71 72 /* 73 * For the master device: 74 * /dev/lofictl -> /devices/pseudo/lofi@0:ctl 75 * For each other device 76 * /dev/lofi/1 -> /devices/pseudo/lofi@0:1 77 * /dev/rlofi/1 -> /devices/pseudo/lofi@0:1,raw 78 */ 79 static int 80 lofi(di_minor_t minor, di_node_t node) 81 { 82 dev_t dev; 83 char mn[MAXNAMELEN + 1]; 84 char blkname[MAXNAMELEN + 1]; 85 char rawname[MAXNAMELEN + 1]; 86 char path[PATH_MAX + 1]; 87 88 (void) strcpy(mn, di_minor_name(minor)); 89 90 if (strcmp(mn, "ctl") == 0) { 91 (void) devfsadm_mklink(LOFI_CTL_NAME, node, minor, 0); 92 } else { 93 dev = di_minor_devt(minor); 94 (void) snprintf(blkname, sizeof (blkname), "%d", 95 (int)minor(dev)); 96 (void) snprintf(rawname, sizeof (rawname), "%d,raw", 97 (int)minor(dev)); 98 99 if (strcmp(mn, blkname) == 0) { 100 (void) snprintf(path, sizeof (path), "%s/%s", 101 LOFI_BLOCK_NAME, blkname); 102 } else if (strcmp(mn, rawname) == 0) { 103 (void) snprintf(path, sizeof (path), "%s/%s", 104 LOFI_CHAR_NAME, blkname); 105 } else { 106 return (DEVFSADM_CONTINUE); 107 } 108 109 (void) devfsadm_mklink(path, node, minor, 0); 110 } 111 return (DEVFSADM_CONTINUE); 112 } 113