60c1cd75dc
This `len` field describes the amount of bytes *written* by the device. It is used to prevent the driver from reading buffer memory that wasn't really written to - it could contain either leftover values from previous requests or even be completely unitialized. In a couple of invalid-request error conditions we still write the VIRTIO_BLK_S_UNSUPP response while returning used_len == 0, but that's fine. A properly written driver will likely handle both of these cases the same way. Change-Id: I8e9f3a8051561096e2ee755122d534b4ffd94db1 Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com> Reviewed-on: https://review.gerrithub.io/393963 Reviewed-by: Pawel Kaminski <pawelx.kaminski@intel.com> Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> |
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| .. | ||
| rte_vhost | ||
| Makefile | ||
| test_plan.md | ||
| vhost_blk.c | ||
| vhost_internal.h | ||
| vhost_rpc.c | ||
| vhost_scsi.c | ||
| vhost.c | ||