block/raw_bsd.c

   1 /* BlockDriver implementation for "raw"
   2  *
   3  * Copyright (C) 2013, Red Hat, Inc.
   4  *
   5  * Author:
   6  *   Laszlo Ersek <lersek@redhat.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to
  10  * deal in the Software without restriction, including without limitation the
  11  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  12  * sell copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  24  * IN THE SOFTWARE.
  25  */
  26
  27 #include "block/block_int.h"
  28
  29 static TYPE raw_reopen_prepare(BlockDriverState *bs)
  30 {
  31     return bdrv_reopen_prepare(bs->file);
  32 }
  33
  34 static TYPE raw_co_readv(BlockDriverState *bs)
  35 {
  36     BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
  37     return bdrv_co_readv(bs->file);
  38 }
  39
  40 static TYPE raw_co_writev(BlockDriverState *bs)
  41 {
  42     BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
  43     return bdrv_co_writev(bs->file);
  44 }
  45
  46 static TYPE raw_co_is_allocated(BlockDriverState *bs)
  47 {
  48     return bdrv_co_is_allocated(bs->file);
  49 }
  50
  51 static TYPE raw_co_write_zeroes(BlockDriverState *bs)
  52 {
  53     return bdrv_co_write_zeroes(bs->file);
  54 }
  55
  56 static TYPE raw_co_discard(BlockDriverState *bs)
  57 {
  58     return bdrv_co_discard(bs->file);
  59 }
  60
  61 static TYPE raw_getlength(BlockDriverState *bs)
  62 {
  63     return bdrv_getlength(bs->file);
  64 }
  65
  66 static TYPE raw_get_info(BlockDriverState *bs)
  67 {
  68     return bdrv_get_info(bs->file);
  69 }
  70
  71 static TYPE raw_truncate(BlockDriverState *bs)
  72 {
  73     return bdrv_truncate(bs->file);
  74 }
  75
  76 static TYPE raw_is_inserted(BlockDriverState *bs)
  77 {
  78     return bdrv_is_inserted(bs->file);
  79 }
  80
  81 static TYPE raw_media_changed(BlockDriverState *bs)
  82 {
  83     return bdrv_media_changed(bs->file);
  84 }
  85
  86 static TYPE raw_eject(BlockDriverState *bs)
  87 {
  88     return bdrv_eject(bs->file);
  89 }
  90
  91 static TYPE raw_lock_medium(BlockDriverState *bs)
  92 {
  93     return bdrv_lock_medium(bs->file);
  94 }
  95
  96 static TYPE raw_ioctl(BlockDriverState *bs)
  97 {
  98     return bdrv_ioctl(bs->file);
  99 }
 100
 101 static TYPE raw_aio_ioctl(BlockDriverState *bs)
 102 {
 103     return bdrv_aio_ioctl(bs->file);
 104 }
 105
 106 static TYPE raw_has_zero_init(BlockDriverState *bs)
 107 {
 108     return bdrv_has_zero_init(bs->file);
 109 }
 110
 111 static TYPE raw_create(void)
 112 {
 113     return bdrv_create_file();
 114 }
 115
 116 static const char *raw_format_name(void)
 117 {
 118     return "raw";
 119 }
 120
 121 static int raw_open(BlockDriverState *bs)
 122 {
 123     bs->sg = bs->file->sg;
 124     return 0;
 125 }
 126
 127 static void raw_close(void)
 128 {
 129 }
 130
 131 static int raw_probe(void)
 132 {
 133     /* smallest possible positive score so that raw is used if and only if no
 134      * other block driver works
 135      */
 136     return 1;
 137 }