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 coroutine_fn raw_co_readv(BlockDriverState *bs, int64_t sector_num,
  13                                      int nb_sectors, QEMUIOVector *qiov)
  14 {
  15     return bdrv_co_readv(bs->file, sector_num, nb_sectors, qiov);
  16 }
  17
  18 static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,
  19                                       int nb_sectors, QEMUIOVector *qiov)
  20 {
  21     return bdrv_co_writev(bs->file, sector_num, nb_sectors, qiov);
  22 }
  23
  24 static void raw_close(BlockDriverState *bs)
  25 {
  26 }
  27
  28 static int64_t raw_getlength(BlockDriverState *bs)
  29 {
  30     return bdrv_getlength(bs->file);
  31 }
  32
  33 static int raw_truncate(BlockDriverState *bs, int64_t offset)
  34 {
  35     return bdrv_truncate(bs->file, offset);
  36 }
  37
  38 static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
  39 {
  40    return 1; /* everything can be opened as raw image */
  41 }
  42
  43 static int coroutine_fn raw_co_discard(BlockDriverState *bs,
  44                                        int64_t sector_num, int nb_sectors)
  45 {
  46     return bdrv_co_discard(bs->file, sector_num, nb_sectors);
  47 }
  48
  49 static int raw_is_inserted(BlockDriverState *bs)
  50 {
  51     return bdrv_is_inserted(bs->file);
  52 }
  53
  54 static int raw_media_changed(BlockDriverState *bs)
  55 {
  56     return bdrv_media_changed(bs->file);
  57 }
  58
  59 static void raw_eject(BlockDriverState *bs, bool eject_flag)
  60 {
  61     bdrv_eject(bs->file, eject_flag);
  62 }
  63
  64 static void raw_lock_medium(BlockDriverState *bs, bool locked)
  65 {
  66     bdrv_lock_medium(bs->file, locked);
  67 }
  68
  69 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
  70 {
  71    return bdrv_ioctl(bs->file, req, buf);
  72 }
  73
  74 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
  75         unsigned long int req, void *buf,
  76         BlockDriverCompletionFunc *cb, void *opaque)
  77 {
  78    return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
  79 }
  80
  81 static int raw_create(const char *filename, QEMUOptionParameter *options)
  82 {
  83     return bdrv_create_file(filename, options);
  84 }
  85
  86 static QEMUOptionParameter raw_create_options[] = {
  87     {
  88         .name = BLOCK_OPT_SIZE,
  89         .type = OPT_SIZE,
  90         .help = "Virtual disk size"
  91     },
  92     { NULL }
  93 };
  94
  95 static int raw_has_zero_init(BlockDriverState *bs)
  96 {
  97     return bdrv_has_zero_init(bs->file);
  98 }
  99
 100 static BlockDriver bdrv_raw = {
 101     .format_name        = "raw",
 102
 103     /* It's really 0, but we need to make g_malloc() happy */
 104     .instance_size      = 1,
 105
 106     .bdrv_open          = raw_open,
 107     .bdrv_close         = raw_close,
 108
 109     .bdrv_co_readv          = raw_co_readv,
 110     .bdrv_co_writev         = raw_co_writev,
 111     .bdrv_co_discard        = raw_co_discard,
 112
 113     .bdrv_probe         = raw_probe,
 114     .bdrv_getlength     = raw_getlength,
 115     .bdrv_truncate      = raw_truncate,
 116
 117     .bdrv_is_inserted   = raw_is_inserted,
 118     .bdrv_media_changed = raw_media_changed,
 119     .bdrv_eject         = raw_eject,
 120     .bdrv_lock_medium   = raw_lock_medium,
 121
 122     .bdrv_ioctl         = raw_ioctl,
 123     .bdrv_aio_ioctl     = raw_aio_ioctl,
 124
 125     .bdrv_create        = raw_create,
 126     .create_options     = raw_create_options,
 127     .bdrv_has_zero_init = raw_has_zero_init,
 128 };
 129
 130 static void bdrv_raw_init(void)
 131 {
 132     bdrv_register(&bdrv_raw);
 133 }
 134
 135 block_init(bdrv_raw_init);