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