diff options
Diffstat (limited to 'block/block-backend.c')
| -rw-r--r-- | block/block-backend.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index 34500e6080..a862f6577b 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -760,7 +760,7 @@ int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset, throttle_group_co_io_limits_intercept(blk, bytes, false); } - return bdrv_co_preadv(blk_bs(blk), offset, bytes, qiov, flags); + return bdrv_co_preadv(blk->root, offset, bytes, qiov, flags); } int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset, @@ -785,7 +785,7 @@ int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset, flags |= BDRV_REQ_FUA; } - return bdrv_co_pwritev(blk_bs(blk), offset, bytes, qiov, flags); + return bdrv_co_pwritev(blk->root, offset, bytes, qiov, flags); } typedef struct BlkRwCo { @@ -870,6 +870,11 @@ int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset, flags | BDRV_REQ_ZERO_WRITE); } +int blk_make_zero(BlockBackend *blk, BdrvRequestFlags flags) +{ + return bdrv_make_zero(blk->root, flags); +} + static void error_callback_bh(void *opaque) { struct BlockBackendAIOCB *acb = opaque; @@ -1303,15 +1308,16 @@ int blk_get_flags(BlockBackend *blk) } } -int blk_get_max_transfer_length(BlockBackend *blk) +/* Returns the maximum transfer length, in bytes; guaranteed nonzero */ +uint32_t blk_get_max_transfer(BlockBackend *blk) { BlockDriverState *bs = blk_bs(blk); + uint32_t max = 0; if (bs) { - return bs->bl.max_transfer_length; - } else { - return 0; + max = bs->bl.max_transfer; } + return MIN_NON_ZERO(max, INT_MAX); } int blk_get_max_iov(BlockBackend *blk) |