block/raw.c

   1
   2 #include "qemu-common.h"
   3 #include "block/block_int.h"
   4 #include "qemu/module.h"
   5
   6 static int raw_open(BlockDriverState *bs, QDict *options, int flags)
   7 {
   8     bs->sg = bs->file->sg;
   9     return 0;
  10 }
  11
  12 /* We have nothing to do for raw reopen, stubs just return
  13  * success */
  14 static int raw_reopen_prepare(BDRVReopenState *state,
  15                               BlockReopenQueue *queue,  Error **errp)
  16 {
  17     return 0;
  18 }
  19
  20 static int coroutine_fn raw_co_readv(BlockDriverState *bs, int64_t sector_num,
  21                                      int nb_sectors, QEMUIOVector *qiov)
  22 {
  23     BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
  24     return bdrv_co_readv(bs->file, sector_num, nb_sectors, qiov);
  25 }
  26
  27 static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,
  28                                       int nb_sectors, QEMUIOVector *qiov)
  29 {
  30     BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
  31     return bdrv_co_writev(bs->file, sector_num, nb_sectors, qiov);
  32 }
  33
  34 static void raw_close(BlockDriverState *bs)
  35 {
  36 }
  37
  38 static int coroutine_fn raw_co_is_allocated(BlockDriverState *bs,
  39                                             int64_t sector_num,
  40                                             int nb_sectors, int *pnum)
  41 {
  42     return bdrv_co_is_allocated(bs->file, sector_num, nb_sectors, pnum);
  43 }
  44
  45 static int coroutine_fn raw_co_write_zeroes(BlockDriverState *bs,
  46                                             int64_t sector_num,
  47                                             int nb_sectors)
  48 {
  49     return bdrv_co_write_zeroes(bs->file, sector_num, nb_sectors);
  50 }
  51
  52 static int64_t raw_getlength(BlockDriverState *bs)
  53 {
  54     return bdrv_getlength(bs->file);
  55 }
  56
  57 static int raw_truncate(BlockDriverState *bs, int64_t offset)
  58 {
  59     return bdrv_truncate(bs->file, offset);
  60 }
  61
  62 static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
  63 {
  64    return 1; /* everything can be opened as raw image */
  65 }
  66
  67 static int coroutine_fn raw_co_discard(BlockDriverState *bs,
  68                                        int64_t sector_num, int nb_sectors)
  69 {
  70     return bdrv_co_discard(bs->file, sector_num, nb_sectors);
  71 }
  72
  73 static int raw_is_inserted(BlockDriverState *bs)
  74 {
  75     return bdrv_is_inserted(bs->file);
  76 }
  77
  78 static int raw_media_changed(BlockDriverState *bs)
  79 {
  80     return bdrv_media_changed(bs->file);
  81 }
  82
  83 static void raw_eject(BlockDriverState *bs, bool eject_flag)
  84 {
  85     bdrv_eject(bs->file, eject_flag);
  86 }
  87
  88 static void raw_lock_medium(BlockDriverState *bs, bool locked)
  89 {
  90     bdrv_lock_medium(bs->file, locked);
  91 }
  92
  93 static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
  94 {
  95    return bdrv_ioctl(bs->file, req, buf);
  96 }
  97
  98 static BlockDriverAIOCB *raw_aio_ioctl(BlockDriverState *bs,
  99         unsigned long int req, void *buf,
 100         BlockDriverCompletionFunc *cb, void *opaque)
 101 {
 102    return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
 103 }
 104
 105 static int raw_create(const char *filename, QEMUOptionParameter *options)
 106 {
 107     return bdrv_create_file(filename, options);
 108 }
 109
 110 static QEMUOptionParameter raw_create_options[] = {
 111     {
 112         .name = BLOCK_OPT_SIZE,
 113         .type = OPT_SIZE,
 114         .help = "Virtual disk size"
 115     },
 116     { NULL }
 117 };
 118
 119 static int raw_has_zero_init(BlockDriverState *bs)
 120 {
 121     return bdrv_has_zero_init(bs->file);
 122 }
 123
 124 static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
 125 {
 126     return bdrv_get_info(bs->file, bdi);
 127 }
 128
 129 static BlockDriver bdrv_raw = {
 130     .format_name        = "raw",
 131
 132     /* It's really 0, but we need to make g_malloc() happy */
 133     .instance_size      = 1,
 134
 135     .bdrv_open          = raw_open,
 136     .bdrv_close         = raw_close,
 137
 138     .bdrv_reopen_prepare  = raw_reopen_prepare,
 139
 140     .bdrv_co_readv          = raw_co_readv,
 141     .bdrv_co_writev         = raw_co_writev,
 142     .bdrv_co_is_allocated   = raw_co_is_allocated,
 143     .bdrv_co_write_zeroes   = raw_co_write_zeroes,
 144     .bdrv_co_discard        = raw_co_discard,
 145
 146     .bdrv_probe         = raw_probe,
 147     .bdrv_getlength     = raw_getlength,
 148     .bdrv_get_info      = raw_get_info,
 149     .bdrv_truncate      = raw_truncate,
 150
 151     .bdrv_is_inserted   = raw_is_inserted,
 152     .bdrv_media_changed = raw_media_changed,
 153     .bdrv_eject         = raw_eject,
 154     .bdrv_lock_medium   = raw_lock_medium,
 155
 156     .bdrv_ioctl         = raw_ioctl,
 157     .bdrv_aio_ioctl     = raw_aio_ioctl,
 158
 159     .bdrv_create        = raw_create,
 160     .create_options     = raw_create_options,
 161     .bdrv_has_zero_init = raw_has_zero_init,
 162 };
 163
 164 static void bdrv_raw_init(void)
 165 {
 166     bdrv_register(&bdrv_raw);
 167 }
 168
 169 block_init(bdrv_raw_init);