block/raw.c

   1
   2 #include "qemu-common.h"
   3 #include "block_int.h"
   4 #include "module.h"
   5
   6 static int raw_open(BlockDriverState *bs, int flags)
   7 {
   8     bs->sg = bs->file->sg;
   9     return 0;
  10 }
  11
  12 static int raw_read(BlockDriverState *bs, int64_t sector_num,
  13                     uint8_t *buf, int nb_sectors)
  14 {
  15     return bdrv_read(bs->file, sector_num, buf, nb_sectors);
  16 }
  17
  18 static int raw_write(BlockDriverState *bs, int64_t sector_num,
  19                      const uint8_t *buf, int nb_sectors)
  20 {
  21     return bdrv_write(bs->file, sector_num, buf, nb_sectors);
  22 }
  23
  24 static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
  25     int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
  26     BlockDriverCompletionFunc *cb, void *opaque)
  27 {
  28     return bdrv_aio_readv(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
  29 }
  30
  31 static BlockDriverAIOCB *raw_aio_writev(BlockDriverState *bs,
  32     int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
  33     BlockDriverCompletionFunc *cb, void *opaque)
  34 {
  35     return bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
  36 }
  37
  38 static void raw_close(BlockDriverState *bs)
  39 {
  40 }
  41
  42 static void raw_flush(BlockDriverState *bs)
  43 {
  44     bdrv_flush(bs->file);
  45 }
  46
  47 static BlockDriverAIOCB *raw_aio_flush(BlockDriverState *bs,
  48     BlockDriverCompletionFunc *cb, void *opaque)
  49 {
  50     return bdrv_aio_flush(bs->file, cb, opaque);
  51 }
  52
  53 static int64_t raw_getlength(BlockDriverState *bs)
  54 {
  55     return bdrv_getlength(bs->file);
  56 }
  57
  58 static int raw_truncate(BlockDriverState *bs, int64_t offset)
  59 {
  60     return bdrv_truncate(bs->file, offset);
  61 }
  62
  63 static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
  64 {
  65    return 1; /* everything can be opened as raw image */
  66 }
  67
  68 static int raw_is_inserted(BlockDriverState *bs)
  69 {
  70     return bdrv_is_inserted(bs->file);
  71 }
  72
  73 static int raw_eject(BlockDriverState *bs, int eject_flag)
  74 {
  75     return bdrv_eject(bs->file, eject_flag);
  76 }
  77
  78 static int raw_set_locked(BlockDriverState *bs, int locked)
  79 {
  80     bdrv_set_locked(bs->file, locked);
  81     return 0;
  82 }
  83
  84 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
  85 {
  86    return bdrv_ioctl(bs->file, req, buf);
  87 }
  88
  89 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
  90         unsigned long int req, void *buf,
  91         BlockDriverCompletionFunc *cb, void *opaque)
  92 {
  93    return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
  94 }
  95
  96 static int raw_create(const char *filename, QEMUOptionParameter *options)
  97 {
  98     return bdrv_create_file(filename, options);
  99 }
 100
 101 static QEMUOptionParameter raw_create_options[] = {
 102     {
 103         .name = BLOCK_OPT_SIZE,
 104         .type = OPT_SIZE,
 105         .help = "Virtual disk size"
 106     },
 107     { NULL }
 108 };
 109
 110 static int raw_has_zero_init(BlockDriverState *bs)
 111 {
 112     return bdrv_has_zero_init(bs->file);
 113 }
 114
 115 static BlockDriver bdrv_raw = {
 116     .format_name        = "raw",
 117
 118     /* It's really 0, but we need to make qemu_malloc() happy */
 119     .instance_size      = 1,
 120
 121     .bdrv_open          = raw_open,
 122     .bdrv_close         = raw_close,
 123     .bdrv_read          = raw_read,
 124     .bdrv_write         = raw_write,
 125     .bdrv_flush         = raw_flush,
 126     .bdrv_probe         = raw_probe,
 127     .bdrv_getlength     = raw_getlength,
 128     .bdrv_truncate      = raw_truncate,
 129
 130     .bdrv_aio_readv     = raw_aio_readv,
 131     .bdrv_aio_writev    = raw_aio_writev,
 132     .bdrv_aio_flush     = raw_aio_flush,
 133
 134     .bdrv_is_inserted   = raw_is_inserted,
 135     .bdrv_eject         = raw_eject,
 136     .bdrv_set_locked    = raw_set_locked,
 137     .bdrv_ioctl         = raw_ioctl,
 138     .bdrv_aio_ioctl     = raw_aio_ioctl,
 139
 140     .bdrv_create        = raw_create,
 141     .create_options     = raw_create_options,
 142     .bdrv_has_zero_init = raw_has_zero_init,
 143 };
 144
 145 static void bdrv_raw_init(void)
 146 {
 147     bdrv_register(&bdrv_raw);
 148 }
 149
 150 block_init(bdrv_raw_init);