1 /* $NetBSD: dm_target_error.c,v 1.10 2010/01/04 00:12:22 haad Exp $ */
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
33 * This file implements initial version of device-mapper error target.
35 #include <sys/types.h>
36 #include <sys/param.h>
42 #ifdef DM_TARGET_MODULE
44 * Every target can be compiled directly to dm driver or as a
45 * separate module this part of target is used for loading targets
47 * Target can be unloaded from kernel only if there are no users of
48 * it e.g. there are no devices which uses that target.
50 #include <sys/kernel.h>
51 #include <sys/module.h>
53 MODULE(MODULE_CLASS_MISC, dm_target_error, "dm");
56 dm_target_error_modcmd(modcmd_t cmd, void *arg)
64 if ((dmt = dm_target_lookup("error")) != NULL) {
65 dm_target_unbusy(dmt);
68 dmt = dm_target_alloc("error");
73 strlcpy(dmt->name, "error", DM_MAX_TYPE_NAME);
74 dmt->init = &dm_target_error_init;
75 dmt->status = &dm_target_error_status;
76 dmt->strategy = &dm_target_error_strategy;
77 dmt->deps = &dm_target_error_deps;
78 dmt->destroy = &dm_target_error_destroy;
79 dmt->upcall = &dm_target_error_upcall;
81 r = dm_target_insert(dmt);
86 r = dm_target_rem("error");
100 /* Init function called from dm_table_load_ioctl. */
102 dm_target_error_init(dm_dev_t * dmv, void **target_config, char *argv)
105 kprintf("Error target init function called!!\n");
107 *target_config = NULL;
109 dmv->dev_type = DM_ERROR_DEV;
113 /* Status routine called to get params string. */
115 dm_target_error_status(void *target_config)
119 /* Strategy routine called from dm_strategy. */
121 dm_target_error_strategy(dm_table_entry_t * table_en, struct buf * bp)
124 kprintf("Error target read function called!!\n");
129 biodone(&bp->b_bio1);
133 /* Doesn't do anything here. */
135 dm_target_error_destroy(dm_table_entry_t * table_en)
137 table_en->target_config = NULL;
139 /* Unbusy target so we can unload it */
140 dm_target_unbusy(table_en->target);
144 /* Doesn't not need to do anything here. */
146 dm_target_error_deps(dm_table_entry_t * table_en, prop_array_t prop_array)
150 /* Unsupported for this target. */
152 dm_target_error_upcall(dm_table_entry_t * table_en, struct buf * bp)