dm_target_stripe.c revision 1.2.4.2
1 1.2.4.2 skrll /*$NetBSD: dm_target_stripe.c,v 1.2.4.2 2009/01/19 13:17:53 skrll Exp $*/ 2 1.2.4.2 skrll 3 1.2.4.2 skrll /* 4 1.2.4.2 skrll * Copyright (c) 2009 The NetBSD Foundation, Inc. 5 1.2.4.2 skrll * All rights reserved. 6 1.2.4.2 skrll * 7 1.2.4.2 skrll * This code is derived from software contributed to The NetBSD Foundation 8 1.2.4.2 skrll * by Adam Hamsik. 9 1.2.4.2 skrll * 10 1.2.4.2 skrll * Redistribution and use in source and binary forms, with or without 11 1.2.4.2 skrll * modification, are permitted provided that the following conditions 12 1.2.4.2 skrll * are met: 13 1.2.4.2 skrll * 1. Redistributions of source code must retain the above copyright 14 1.2.4.2 skrll * notice, this list of conditions and the following disclaimer. 15 1.2.4.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.4.2 skrll * notice, this list of conditions and the following disclaimer in the 17 1.2.4.2 skrll * documentation and/or other materials provided with the distribution. 18 1.2.4.2 skrll * 19 1.2.4.2 skrll * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2.4.2 skrll * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2.4.2 skrll * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2.4.2 skrll * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2.4.2 skrll * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2.4.2 skrll * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2.4.2 skrll * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2.4.2 skrll * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2.4.2 skrll * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2.4.2 skrll * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2.4.2 skrll * POSSIBILITY OF SUCH DAMAGE. 30 1.2.4.2 skrll */ 31 1.2.4.2 skrll 32 1.2.4.2 skrll /* 33 1.2.4.2 skrll * This file implements initial version of device-mapper stripe target. 34 1.2.4.2 skrll */ 35 1.2.4.2 skrll #include <sys/types.h> 36 1.2.4.2 skrll #include <sys/param.h> 37 1.2.4.2 skrll 38 1.2.4.2 skrll #include <sys/buf.h> 39 1.2.4.2 skrll 40 1.2.4.2 skrll #include "dm.h" 41 1.2.4.2 skrll 42 1.2.4.2 skrll #ifdef DM_TARGET_MODULE 43 1.2.4.2 skrll /* 44 1.2.4.2 skrll * Every target can be compiled directly to dm driver or as a 45 1.2.4.2 skrll * separate module this part of target is used for loading targets 46 1.2.4.2 skrll * to dm driver. 47 1.2.4.2 skrll * Target can be unloaded from kernel only if there are no users of 48 1.2.4.2 skrll * it e.g. there are no devices which uses that target. 49 1.2.4.2 skrll */ 50 1.2.4.2 skrll #include <sys/kernel.h> 51 1.2.4.2 skrll #include <sys/module.h> 52 1.2.4.2 skrll 53 1.2.4.2 skrll MODULE(MODULE_CLASS_MISC, dm_target_stripe, NULL); 54 1.2.4.2 skrll 55 1.2.4.2 skrll static int 56 1.2.4.2 skrll dm_target_stripe_modcmd(modcmd_t cmd, void *arg) 57 1.2.4.2 skrll { 58 1.2.4.2 skrll dm_target_t *dmt; 59 1.2.4.2 skrll int r; 60 1.2.4.2 skrll dmt = NULL; 61 1.2.4.2 skrll 62 1.2.4.2 skrll switch (cmd) { 63 1.2.4.2 skrll case MODULE_CMD_INIT: 64 1.2.4.2 skrll if ((dmt = dm_target_lookup("stripe")) != NULL) 65 1.2.4.2 skrll return EEXIST; 66 1.2.4.2 skrll 67 1.2.4.2 skrll dmt = dm_target_alloc("stripe"); 68 1.2.4.2 skrll 69 1.2.4.2 skrll dmt->version[0] = 1; 70 1.2.4.2 skrll dmt->version[1] = 0; 71 1.2.4.2 skrll dmt->version[2] = 0; 72 1.2.4.2 skrll strlcpy(dmt->name, "stripe", DM_MAX_TYPE_NAME); 73 1.2.4.2 skrll dmt->init = &dm_target_stripe_init; 74 1.2.4.2 skrll dmt->status = &dm_target_stripe_status; 75 1.2.4.2 skrll dmt->strategy = &dm_target_stripe_strategy; 76 1.2.4.2 skrll dmt->deps = &dm_target_stripe_deps; 77 1.2.4.2 skrll dmt->destroy = &dm_target_stripe_destroy; 78 1.2.4.2 skrll dmt->upcall = &dm_target_stripe_upcall; 79 1.2.4.2 skrll 80 1.2.4.2 skrll r = dm_target_insert(dmt); 81 1.2.4.2 skrll 82 1.2.4.2 skrll break; 83 1.2.4.2 skrll 84 1.2.4.2 skrll case MODULE_CMD_FINI: 85 1.2.4.2 skrll r = dm_target_rem("stripe"); 86 1.2.4.2 skrll break; 87 1.2.4.2 skrll 88 1.2.4.2 skrll case MODULE_CMD_STAT: 89 1.2.4.2 skrll return ENOTTY; 90 1.2.4.2 skrll 91 1.2.4.2 skrll default: 92 1.2.4.2 skrll return ENOTTY; 93 1.2.4.2 skrll } 94 1.2.4.2 skrll 95 1.2.4.2 skrll return r; 96 1.2.4.2 skrll } 97 1.2.4.2 skrll 98 1.2.4.2 skrll #endif 99 1.2.4.2 skrll 100 1.2.4.2 skrll /* Init function called from dm_table_load_ioctl. */ 101 1.2.4.2 skrll int 102 1.2.4.2 skrll dm_target_stripe_init(dm_dev_t *dmv, void **target_config, char *argv) 103 1.2.4.2 skrll { 104 1.2.4.2 skrll 105 1.2.4.2 skrll printf("Stripe target init function called!!\n"); 106 1.2.4.2 skrll 107 1.2.4.2 skrll *target_config = NULL; 108 1.2.4.2 skrll 109 1.2.4.2 skrll dmv->dev_type = DM_STRIPE_DEV; 110 1.2.4.2 skrll 111 1.2.4.2 skrll return ENOSYS; 112 1.2.4.2 skrll } 113 1.2.4.2 skrll 114 1.2.4.2 skrll /* Status routine called to get params string. */ 115 1.2.4.2 skrll char * 116 1.2.4.2 skrll dm_target_stripe_status(void *target_config) 117 1.2.4.2 skrll { 118 1.2.4.2 skrll return NULL; 119 1.2.4.2 skrll } 120 1.2.4.2 skrll 121 1.2.4.2 skrll /* Strategy routine called from dm_strategy. */ 122 1.2.4.2 skrll int 123 1.2.4.2 skrll dm_target_stripe_strategy(dm_table_entry_t *table_en, struct buf *bp) 124 1.2.4.2 skrll { 125 1.2.4.2 skrll 126 1.2.4.2 skrll printf("Stripe target read function called!!\n"); 127 1.2.4.2 skrll 128 1.2.4.2 skrll bp->b_error = EIO; 129 1.2.4.2 skrll bp->b_resid = 0; 130 1.2.4.2 skrll 131 1.2.4.2 skrll biodone(bp); 132 1.2.4.2 skrll 133 1.2.4.2 skrll return 0; 134 1.2.4.2 skrll } 135 1.2.4.2 skrll 136 1.2.4.2 skrll /* Doesn't do anything here. */ 137 1.2.4.2 skrll int 138 1.2.4.2 skrll dm_target_stripe_destroy(dm_table_entry_t *table_en) 139 1.2.4.2 skrll { 140 1.2.4.2 skrll table_en->target_config = NULL; 141 1.2.4.2 skrll 142 1.2.4.2 skrll /* Unbusy target so we can unload it */ 143 1.2.4.2 skrll dm_target_unbusy(table_en->target); 144 1.2.4.2 skrll 145 1.2.4.2 skrll return 0; 146 1.2.4.2 skrll } 147 1.2.4.2 skrll 148 1.2.4.2 skrll /* Doesn't not need to do anything here. */ 149 1.2.4.2 skrll int 150 1.2.4.2 skrll dm_target_stripe_deps(dm_table_entry_t *table_en, prop_array_t prop_array) 151 1.2.4.2 skrll { 152 1.2.4.2 skrll return 0; 153 1.2.4.2 skrll } 154 1.2.4.2 skrll 155 1.2.4.2 skrll /* Unsupported for this target. */ 156 1.2.4.2 skrll int 157 1.2.4.2 skrll dm_target_stripe_upcall(dm_table_entry_t *table_en, struct buf *bp) 158 1.2.4.2 skrll { 159 1.2.4.2 skrll return 0; 160 1.2.4.2 skrll } 161
Indexes created Thu Oct 02 01:09:59 GMT 2025