diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-04-02 19:50:44 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2015-04-08 10:39:18 +0100 |
| commit | 2a6cdd6d35158bc7a6aacd92b5b0302f28ec480e (patch) | |
| tree | 51b158464e2013fd972bc2401d74ca13d4281743 /include | |
| parent | e4603fe139e2161464d7e75faa3a650e31f057fc (diff) | |
virtio-blk: correctly dirty guest memory
After qemu_iovec_destroy, the QEMUIOVector's size is zeroed and
the zero size ultimately is used to compute virtqueue_push's len
argument. Therefore, reads from virtio-blk devices did not
migrate their results correctly. (Writes were okay).
Save the size in virtio_blk_handle_request, and use it when the request
is completed.
Based on a patch by Wen Congyang.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Message-id: 1427997044-392-1-git-send-email-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/virtio/virtio-blk.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h index b3ffcd96b8..6bf5905c52 100644 --- a/include/hw/virtio/virtio-blk.h +++ b/include/hw/virtio/virtio-blk.h @@ -67,6 +67,7 @@ typedef struct VirtIOBlockReq { struct virtio_blk_inhdr *in; struct virtio_blk_outhdr out; QEMUIOVector qiov; + size_t in_len; struct VirtIOBlockReq *next; struct VirtIOBlockReq *mr_next; BlockAcctCookie acct; |