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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License (the "License").
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6 * You may not use this file except in compliance with the License.
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7 *
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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9 * or http://www.opensolaris.org/os/licensing.
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10 * See the License for the specific language governing permissions
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11 * and limitations under the License.
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12 *
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13 * When distributing Covered Code, include this CDDL HEADER in each
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 * If applicable, add the following below this CDDL HEADER, with the
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16 * fields enclosed by brackets "[]" replaced with your own identifying
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17 * information: Portions Copyright [yyyy] [name of copyright owner]
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18 *
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19 * CDDL HEADER END
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20 */
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21 /*
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22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
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23 * Use is subject to license terms.
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24 */
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25
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26 #pragma ident "@(#)lofi_link.c 1.5 06/10/02 SMI"
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27
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28 #include <regex.h>
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29 #include <devfsadm.h>
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30 #include <stdio.h>
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31 #include <strings.h>
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32 #include <stdlib.h>
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33 #include <limits.h>
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34 #include <sys/mkdev.h>
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35 #include <sys/lofi.h>
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36
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37
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38 static int lofi(di_minor_t minor, di_node_t node);
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39 static int lofi_rm_all(char *link);
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40
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41 /*
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42 * devfs create callback register
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43 */
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44 static devfsadm_create_t lofi_create_cbt[] = {
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45 { "pseudo", "ddi_pseudo", LOFI_DRIVER_NAME,
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46 TYPE_EXACT | DRV_EXACT, ILEVEL_0, lofi,
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47 },
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48 };
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49 DEVFSADM_CREATE_INIT_V0(lofi_create_cbt);
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50
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51 /*
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52 * devfs cleanup register
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53 */
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54 static devfsadm_remove_V1_t lofi_remove_cbt[] = {
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55 {"pseudo", "^r?lofi/[0-9]+$", RM_ALWAYS | RM_PRE | RM_HOT,
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56 ILEVEL_0, lofi_rm_all},
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57 };
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58 DEVFSADM_REMOVE_INIT_V1(lofi_remove_cbt);
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59
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60 /*
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61 * Wrapper around devfsadm_rm_all() that allows termination of remove
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62 * process
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63 */
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64 static int
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65 lofi_rm_all(char *link)
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66 {
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67 devfsadm_rm_all(link);
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68 return (DEVFSADM_TERMINATE);
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69 }
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70
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71
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72 /*
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73 * For the master device:
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74 * /dev/lofictl -> /devices/pseudo/lofi@0:ctl
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75 * For each other device
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76 * /dev/lofi/1 -> /devices/pseudo/lofi@0:1
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77 * /dev/rlofi/1 -> /devices/pseudo/lofi@0:1,raw
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78 */
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79 static int
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80 lofi(di_minor_t minor, di_node_t node)
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81 {
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82 dev_t dev;
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83 char mn[MAXNAMELEN + 1];
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84 char blkname[MAXNAMELEN + 1];
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85 char rawname[MAXNAMELEN + 1];
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86 char path[PATH_MAX + 1];
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87
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88 (void) strcpy(mn, di_minor_name(minor));
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89
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90 if (strcmp(mn, "ctl") == 0) {
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91 (void) devfsadm_mklink(LOFI_CTL_NAME, node, minor, 0);
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92 } else {
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93 dev = di_minor_devt(minor);
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94 (void) snprintf(blkname, sizeof (blkname), "%d",
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95 (int)minor(dev));
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96 (void) snprintf(rawname, sizeof (rawname), "%d,raw",
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97 (int)minor(dev));
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98
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99 if (strcmp(mn, blkname) == 0) {
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100 (void) snprintf(path, sizeof (path), "%s/%s",
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101 LOFI_BLOCK_NAME, blkname);
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102 } else if (strcmp(mn, rawname) == 0) {
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103 (void) snprintf(path, sizeof (path), "%s/%s",
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104 LOFI_CHAR_NAME, blkname);
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105 } else {
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106 return (DEVFSADM_CONTINUE);
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107 }
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108
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109 (void) devfsadm_mklink(path, node, minor, 0);
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110 }
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111 return (DEVFSADM_CONTINUE);
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112 }
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