diff options
| author | haad <haad@NetBSD.org> | 2008-12-19 15:24:03 +0000 |
|---|---|---|
| committer | haad <haad@NetBSD.org> | 2008-12-19 15:24:03 +0000 |
| commit | c9d0c62a0c2516f692248741b9902592dfd4f690 (patch) | |
| tree | df3160366e6de1d5dc788216cbed8f3cad3e04fe /sys/dev/dm/dm_target_zero.c | |
| parent | 992269c5c4ca1327588284bd09118ceb10888690 (diff) | |
Merge the haad-dm branch to -current. This branch adds LVM functionality to
the base NetBSD system. It uses Linux LVM2 tools and our BSD licensed
device-mapper driver.
The device-mapper driver can be used to create virtual block devices which
maps virtual blocks to real with target mapping called target. Currently
these targets are available a linear, zero, error and a snapshot (this is
work in progress and doesn't work yet).
The lvm2tools adds lvm and dmsetup binary to based system, where the lvm
tool is used to manage and administer whole LVM and the dmestup is used to
communicate iwith device-mapper kernel driver. With these tools also
a libdevmapper library is instaled to the base system.
Building of tools and driver is currently disable and can be enabled with
MKLVM=yes in mk.conf. I will add sets lists and rc.d script soon.
Oked by agc@ and cube@.
Diffstat (limited to 'sys/dev/dm/dm_target_zero.c')
| -rw-r--r-- | sys/dev/dm/dm_target_zero.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/sys/dev/dm/dm_target_zero.c b/sys/dev/dm/dm_target_zero.c new file mode 100644 index 00000000000..b2defff836c --- /dev/null +++ b/sys/dev/dm/dm_target_zero.c @@ -0,0 +1,108 @@ +/* $NetBSD: dm_target_zero.c,v 1.2 2008/12/19 15:24:03 haad Exp $ */ + +/* + * Copyright (c) 2008 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Adam Hamsik. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + + +/* + * This file implements initial version of device-mapper zero target. + */ +#include <sys/types.h> +#include <sys/param.h> + +#include <sys/buf.h> + +#include "dm.h" + +/* + * Zero target init function. This target doesn't need + * target specific config area. + */ +int +dm_target_zero_init(dm_dev_t *dmv, void **target_config, char *argv) +{ + + printf("Zero target init function called!!\n"); + + dmv->dev_type = DM_ZERO_DEV; + + *target_config = NULL; + + return 0; +} + +/* Status routine called to get params string. */ +char * +dm_target_zero_status(void *target_config) +{ + return NULL; +} + + +/* + * This routine does IO operations. + */ +int +dm_target_zero_strategy(dm_table_entry_t *table_en, struct buf *bp) +{ + + /* printf("Zero target read function called %d!!\n", bp->b_bcount); */ + + memset(bp->b_data, 0, bp->b_bcount); + bp->b_resid = 0; /* nestiobuf_done wants b_resid = 0 to be sure + that there is no other io to done */ + + biodone(bp); + + return 0; +} + +/* Doesn't not need to do anything here. */ +int +dm_target_zero_destroy(dm_table_entry_t *table_en) +{ + table_en->target_config = NULL; + + return 0; +} + +/* Doesn't not need to do anything here. */ +int +dm_target_zero_deps(dm_table_entry_t *table_en, prop_array_t prop_array) +{ + return 0; +} + +/* Unsuported for this target. */ +int +dm_target_zero_upcall(dm_table_entry_t *table_en, struct buf *bp) +{ + return 0; +} + |
