1 /* $NetBSD: dm_target_error.c,v 1.10 2010/01/04 00:12:22 haad Exp $ */ 2 3 /* 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Hamsik. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * This file implements initial version of device-mapper error target. 34 */ 35 #include <sys/types.h> 36 #include <sys/param.h> 37 38 #include <sys/buf.h> 39 40 #include "dm.h" 41 42 /* Init function called from dm_table_load_ioctl. */ 43 int 44 dm_target_error_init(dm_dev_t * dmv, void **target_config, char *argv) 45 { 46 47 kprintf("Error target init function called!!\n"); 48 49 *target_config = NULL; 50 51 dmv->dev_type = DM_ERROR_DEV; 52 53 return 0; 54 } 55 /* Status routine called to get params string. */ 56 char * 57 dm_target_error_status(void *target_config) 58 { 59 return NULL; 60 } 61 /* Strategy routine called from dm_strategy. */ 62 int 63 dm_target_error_strategy(dm_table_entry_t * table_en, struct buf * bp) 64 { 65 66 kprintf("Error target read function called!!\n"); 67 68 bp->b_error = EIO; 69 bp->b_resid = 0; 70 71 biodone(&bp->b_bio1); 72 73 return 0; 74 } 75 /* Doesn't do anything here. */ 76 int 77 dm_target_error_destroy(dm_table_entry_t * table_en) 78 { 79 table_en->target_config = NULL; 80 81 /* Unbusy target so we can unload it */ 82 dm_target_unbusy(table_en->target); 83 84 return 0; 85 } 86 /* Doesn't not need to do anything here. */ 87 int 88 dm_target_error_deps(dm_table_entry_t * table_en, prop_array_t prop_array) 89 { 90 return 0; 91 } 92 /* Unsupported for this target. */ 93 int 94 dm_target_error_upcall(dm_table_entry_t * table_en, struct buf * bp) 95 { 96 return 0; 97 } 98