diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/vdi.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/block/vdi.c b/block/vdi.c index e1c42ad732..d7ef6628e7 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -171,6 +171,8 @@ typedef struct { uint64_t unused2[7]; } QEMU_PACKED VdiHeader; +QEMU_BUILD_BUG_ON(sizeof(VdiHeader) != 512); + typedef struct { /* The block map entries are little endian (even in memory). */ uint32_t *bmap; @@ -384,7 +386,7 @@ static int vdi_open(BlockDriverState *bs, QDict *options, int flags, logout("\n"); - ret = bdrv_read(bs->file, 0, (uint8_t *)&header, 1); + ret = bdrv_pread(bs->file, 0, &header, sizeof(header)); if (ret < 0) { goto fail; } @@ -484,8 +486,8 @@ static int vdi_open(BlockDriverState *bs, QDict *options, int flags, goto fail; } - ret = bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, - bmap_size); + ret = bdrv_pread(bs->file, header.offset_bmap, s->bmap, + bmap_size * SECTOR_SIZE); if (ret < 0) { goto fail_free_bmap; } @@ -704,7 +706,7 @@ nonallocating_write: assert(VDI_IS_ALLOCATED(bmap_first)); *header = s->header; vdi_header_to_le(header); - ret = bdrv_write(bs->file, 0, block, 1); + ret = bdrv_pwrite(bs->file, 0, block, sizeof(VdiHeader)); g_free(block); block = NULL; @@ -722,10 +724,11 @@ nonallocating_write: base = ((uint8_t *)&s->bmap[0]) + bmap_first * SECTOR_SIZE; logout("will write %u block map sectors starting from entry %u\n", n_sectors, bmap_first); - ret = bdrv_write(bs->file, offset, base, n_sectors); + ret = bdrv_pwrite(bs->file, offset * SECTOR_SIZE, base, + n_sectors * SECTOR_SIZE); } - return ret; + return ret < 0 ? ret : 0; } static int coroutine_fn vdi_co_do_create(BlockdevCreateOptions *create_options, |