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| author | Greg Kurz | 2016-09-30 17:13:07 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin | 2016-10-10 00:16:59 +0200 |
| commit | 20ea686a0cacdec1bde9a39e74afd38bf672424d (patch) | |
| tree | 7932a023d98f87301b5412d480e15ae63cdbad85 /scripts/simpletrace.py | |
| parent | virtio-9p: handle handle_9p_output() error (diff) | |
| download | qemu-20ea686a0cacdec1bde9a39e74afd38bf672424d.tar.gz qemu-20ea686a0cacdec1bde9a39e74afd38bf672424d.tar.xz qemu-20ea686a0cacdec1bde9a39e74afd38bf672424d.zip | |
virtio-blk: handle virtio_blk_handle_request() errors
All these errors are caused by a buggy guest: QEMU should not exit.
With this patch, if virtio_blk_handle_request() detects a buggy request, it
marks the device as broken and returns an error to the caller so it takes
appropriate action.
In the case of virtio_blk_handle_vq(), we detach the request from the
virtqueue, free its allocated memory and stop popping new requests.
We don't need to bother about multireq since virtio_blk_handle_request()
errors out early and mrb.num_reqs == 0.
In the case of virtio_blk_dma_restart_bh(), we need to detach and free all
queued requests as well.
Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'scripts/simpletrace.py')
0 files changed, 0 insertions, 0 deletions