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     BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
  16     return bdrv_co_readv(bs->file, sector_num, nb_sectors, qiov);
  17 }
  18
  19 static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,
  20                                       int nb_sectors, QEMUIOVector *qiov)
  21 {
  22     BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
  23     return bdrv_co_writev(bs->file, sector_num, nb_sectors, qiov);
  24 }
  25
  26 static void raw_close(BlockDriverState *bs)
  27 {
  28 }
  29
  30 static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs,
  31                                             int64_t sector_num,
  32                                             int nb_sectors, int *pnum)
  33 {
  34     return bdrv_co_is_allocated(bs->file, sector_num, nb_sectors, pnum);
  35 }
  36
  37 static int64_t raw_getlength(BlockDriverState *bs)
  38 {
  39     return bdrv_getlength(bs->file);
  40 }
  41
  42 static int raw_truncate(BlockDriverState *bs, int64_t offset)
  43 {
  44     return bdrv_truncate(bs->file, offset);
  45 }
  46
  47 static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
  48 {
  49    return 1; /* everything can be opened as raw image */
  50 }
  51
  52 static int coroutine_fn raw_co_discard(BlockDriverState *bs,
  53                                        int64_t sector_num, int nb_sectors)
  54 {
  55     return bdrv_co_discard(bs->file, sector_num, nb_sectors);
  56 }
  57
  58 static int raw_is_inserted(BlockDriverState *bs)
  59 {
  60     return bdrv_is_inserted(bs->file);
  61 }
  62
  63 static int raw_media_changed(BlockDriverState *bs)
  64 {
  65     return bdrv_media_changed(bs->file);
  66 }
  67
  68 static void raw_eject(BlockDriverState *bs, bool eject_flag)
  69 {
  70     bdrv_eject(bs->file, eject_flag);
  71 }
  72
  73 static void raw_lock_medium(BlockDriverState *bs, bool locked)
  74 {
  75     bdrv_lock_medium(bs->file, locked);
  76 }
  77
  78 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
  79 {
  80    return bdrv_ioctl(bs->file, req, buf);
  81 }
  82
  83 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
  84         unsigned long int req, void *buf,
  85         BlockDriverCompletionFunc *cb, void *opaque)
  86 {
  87    return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
  88 }
  89
  90 static int raw_create(const char *filename, QEMUOptionParameter *options)
  91 {
  92     return bdrv_create_file(filename, options);
  93 }
  94
  95 static QEMUOptionParameter raw_create_options[] = {
  96     {
  97         .name = BLOCK_OPT_SIZE,
  98         .type = OPT_SIZE,
  99         .help = "Virtual disk size"
 100     },
 101     { NULL }
 102 };
 103
 104 static int raw_has_zero_init(BlockDriverState *bs)
 105 {
 106     return bdrv_has_zero_init(bs->file);
 107 }
 108
 109 static BlockDriver bdrv_raw = {
 110     .format_name        = "raw",
 111
 112     /* It's really 0, but we need to make g_malloc() happy */
 113     .instance_size      = 1,
 114
 115     .bdrv_open          = raw_open,
 116     .bdrv_close         = raw_close,
 117
 118     .bdrv_co_readv          = raw_co_readv,
 119     .bdrv_co_writev         = raw_co_writev,
 120     .bdrv_co_is_allocated   = raw_co_is_allocated,
 121     .bdrv_co_discard        = raw_co_discard,
 122
 123     .bdrv_probe         = raw_probe,
 124     .bdrv_getlength     = raw_getlength,
 125     .bdrv_truncate      = raw_truncate,
 126
 127     .bdrv_is_inserted   = raw_is_inserted,
 128     .bdrv_media_changed = raw_media_changed,
 129     .bdrv_eject         = raw_eject,
 130     .bdrv_lock_medium   = raw_lock_medium,
 131
 132     .bdrv_ioctl         = raw_ioctl,
 133     .bdrv_aio_ioctl     = raw_aio_ioctl,
 134
 135     .bdrv_create        = raw_create,
 136     .create_options     = raw_create_options,
 137     .bdrv_has_zero_init = raw_has_zero_init,
 138 };
 139
 140 static void bdrv_raw_init(void)
 141 {
 142     bdrv_register(&bdrv_raw);
 143 }
 144
 145 block_init(bdrv_raw_init);