dm_target_mirror.c revision 1.3.2.2
1 1.3.2.2 mjf /*$NetBSD: dm_target_mirror.c,v 1.3.2.2 2009/01/17 13:28:53 mjf Exp $*/ 2 1.3.2.2 mjf 3 1.3.2.2 mjf /* 4 1.3.2.2 mjf * Copyright (c) 2009 The NetBSD Foundation, Inc. 5 1.3.2.2 mjf * All rights reserved. 6 1.3.2.2 mjf * 7 1.3.2.2 mjf * This code is derived from software contributed to The NetBSD Foundation 8 1.3.2.2 mjf * by Adam Hamsik. 9 1.3.2.2 mjf * 10 1.3.2.2 mjf * Redistribution and use in source and binary forms, with or without 11 1.3.2.2 mjf * modification, are permitted provided that the following conditions 12 1.3.2.2 mjf * are met: 13 1.3.2.2 mjf * 1. Redistributions of source code must retain the above copyright 14 1.3.2.2 mjf * notice, this list of conditions and the following disclaimer. 15 1.3.2.2 mjf * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.2.2 mjf * notice, this list of conditions and the following disclaimer in the 17 1.3.2.2 mjf * documentation and/or other materials provided with the distribution. 18 1.3.2.2 mjf * 19 1.3.2.2 mjf * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.3.2.2 mjf * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.3.2.2 mjf * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.3.2.2 mjf * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.3.2.2 mjf * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.3.2.2 mjf * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.3.2.2 mjf * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.3.2.2 mjf * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.3.2.2 mjf * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.3.2.2 mjf * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.3.2.2 mjf * POSSIBILITY OF SUCH DAMAGE. 30 1.3.2.2 mjf */ 31 1.3.2.2 mjf 32 1.3.2.2 mjf /* 33 1.3.2.2 mjf * This file implements initial version of device-mapper mirror target. 34 1.3.2.2 mjf */ 35 1.3.2.2 mjf #include <sys/types.h> 36 1.3.2.2 mjf #include <sys/param.h> 37 1.3.2.2 mjf 38 1.3.2.2 mjf #include <sys/buf.h> 39 1.3.2.2 mjf 40 1.3.2.2 mjf #include "dm.h" 41 1.3.2.2 mjf 42 1.3.2.2 mjf #ifdef DM_TARGET_MODULE 43 1.3.2.2 mjf /* 44 1.3.2.2 mjf * Every target can be compiled directly to dm driver or as a 45 1.3.2.2 mjf * separate module this part of target is used for loading targets 46 1.3.2.2 mjf * to dm driver. 47 1.3.2.2 mjf * Target can be unloaded from kernel only if there are no users of 48 1.3.2.2 mjf * it e.g. there are no devices which uses that target. 49 1.3.2.2 mjf */ 50 1.3.2.2 mjf #include <sys/kernel.h> 51 1.3.2.2 mjf #include <sys/module.h> 52 1.3.2.2 mjf 53 1.3.2.2 mjf MODULE(MODULE_CLASS_MISC, dm_target_mirror, "dm"); 54 1.3.2.2 mjf 55 1.3.2.2 mjf static int 56 1.3.2.2 mjf dm_target_mirror_modcmd(modcmd_t cmd, void *arg) 57 1.3.2.2 mjf { 58 1.3.2.2 mjf dm_target_t *dmt; 59 1.3.2.2 mjf int r; 60 1.3.2.2 mjf dmt = NULL; 61 1.3.2.2 mjf 62 1.3.2.2 mjf switch (cmd) { 63 1.3.2.2 mjf case MODULE_CMD_INIT: 64 1.3.2.2 mjf if ((dmt = dm_target_lookup("mirror")) != NULL) 65 1.3.2.2 mjf return EEXIST; 66 1.3.2.2 mjf 67 1.3.2.2 mjf dmt = dm_target_alloc("mirror"); 68 1.3.2.2 mjf 69 1.3.2.2 mjf dmt->version[0] = 1; 70 1.3.2.2 mjf dmt->version[1] = 0; 71 1.3.2.2 mjf dmt->version[2] = 0; 72 1.3.2.2 mjf strlcpy(dmt->name, "mirror", DM_MAX_TYPE_NAME); 73 1.3.2.2 mjf dmt->init = &dm_target_mirror_init; 74 1.3.2.2 mjf dmt->status = &dm_target_mirror_status; 75 1.3.2.2 mjf dmt->strategy = &dm_target_mirror_strategy; 76 1.3.2.2 mjf dmt->deps = &dm_target_mirror_deps; 77 1.3.2.2 mjf dmt->destroy = &dm_target_mirror_destroy; 78 1.3.2.2 mjf dmt->upcall = &dm_target_mirror_upcall; 79 1.3.2.2 mjf 80 1.3.2.2 mjf r = dm_target_insert(dmt); 81 1.3.2.2 mjf 82 1.3.2.2 mjf break; 83 1.3.2.2 mjf 84 1.3.2.2 mjf case MODULE_CMD_FINI: 85 1.3.2.2 mjf r = dm_target_rem("mirror"); 86 1.3.2.2 mjf break; 87 1.3.2.2 mjf 88 1.3.2.2 mjf case MODULE_CMD_STAT: 89 1.3.2.2 mjf return ENOTTY; 90 1.3.2.2 mjf 91 1.3.2.2 mjf default: 92 1.3.2.2 mjf return ENOTTY; 93 1.3.2.2 mjf } 94 1.3.2.2 mjf 95 1.3.2.2 mjf return r; 96 1.3.2.2 mjf } 97 1.3.2.2 mjf 98 1.3.2.2 mjf #endif 99 1.3.2.2 mjf 100 1.3.2.2 mjf /* Init function called from dm_table_load_ioctl. */ 101 1.3.2.2 mjf int 102 1.3.2.2 mjf dm_target_mirror_init(dm_dev_t *dmv, void **target_config, char *argv) 103 1.3.2.2 mjf { 104 1.3.2.2 mjf 105 1.3.2.2 mjf printf("Mirror target init function called!!\n"); 106 1.3.2.2 mjf 107 1.3.2.2 mjf *target_config = NULL; 108 1.3.2.2 mjf 109 1.3.2.2 mjf dmv->dev_type = DM_MIRROR_DEV; 110 1.3.2.2 mjf 111 1.3.2.2 mjf return ENOSYS; 112 1.3.2.2 mjf } 113 1.3.2.2 mjf 114 1.3.2.2 mjf /* Status routine called to get params string. */ 115 1.3.2.2 mjf char * 116 1.3.2.2 mjf dm_target_mirror_status(void *target_config) 117 1.3.2.2 mjf { 118 1.3.2.2 mjf return NULL; 119 1.3.2.2 mjf } 120 1.3.2.2 mjf 121 1.3.2.2 mjf /* Strategy routine called from dm_strategy. */ 122 1.3.2.2 mjf int 123 1.3.2.2 mjf dm_target_mirror_strategy(dm_table_entry_t *table_en, struct buf *bp) 124 1.3.2.2 mjf { 125 1.3.2.2 mjf 126 1.3.2.2 mjf printf("Mirror target read function called!!\n"); 127 1.3.2.2 mjf 128 1.3.2.2 mjf bp->b_error = EIO; 129 1.3.2.2 mjf bp->b_resid = 0; 130 1.3.2.2 mjf 131 1.3.2.2 mjf biodone(bp); 132 1.3.2.2 mjf 133 1.3.2.2 mjf return 0; 134 1.3.2.2 mjf } 135 1.3.2.2 mjf 136 1.3.2.2 mjf /* Doesn't do anything here. */ 137 1.3.2.2 mjf int 138 1.3.2.2 mjf dm_target_mirror_destroy(dm_table_entry_t *table_en) 139 1.3.2.2 mjf { 140 1.3.2.2 mjf table_en->target_config = NULL; 141 1.3.2.2 mjf 142 1.3.2.2 mjf /* Unbusy target so we can unload it */ 143 1.3.2.2 mjf dm_target_unbusy(table_en->target); 144 1.3.2.2 mjf 145 1.3.2.2 mjf return 0; 146 1.3.2.2 mjf } 147 1.3.2.2 mjf 148 1.3.2.2 mjf /* Doesn't not need to do anything here. */ 149 1.3.2.2 mjf int 150 1.3.2.2 mjf dm_target_mirror_deps(dm_table_entry_t *table_en, prop_array_t prop_array) 151 1.3.2.2 mjf { 152 1.3.2.2 mjf return 0; 153 1.3.2.2 mjf } 154 1.3.2.2 mjf 155 1.3.2.2 mjf /* Unsupported for this target. */ 156 1.3.2.2 mjf int 157 1.3.2.2 mjf dm_target_mirror_upcall(dm_table_entry_t *table_en, struct buf *bp) 158 1.3.2.2 mjf { 159 1.3.2.2 mjf return 0; 160 1.3.2.2 mjf } 161
Indexes created Thu Oct 02 01:09:59 GMT 2025