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author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2016-01-29 13:18:56 +0000 |
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committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:31:48 -0600 |
commit | 3846bde38245f58e2ea38c79ff2c3c1020691f23 (patch) | |
tree | 4513fb18a6ff7f9e90d22350e4cbedb503be6af5 /hw/virtio | |
parent | 12679bb999f6b86f6d16cbae1751dd98a125e009 (diff) | |
download | hqemu-3846bde38245f58e2ea38c79ff2c3c1020691f23.zip hqemu-3846bde38245f58e2ea38c79ff2c3c1020691f23.tar.gz |
Fix virtio migration
I misunderstood the vmstate macro definition when I reworked the
virtio .get/.put.
The VMSTATE_STRUCT_VARRAY_KNOWN, was described as being for "a
variable length array (i.e. _type *_field) but we know the
length". However it actually specified operation for arrays embedded in
the struct (i.e. _type _field[]) since it lacked the VMS_POINTER
flag. This caused offset calculation to be completely off, examining and
potentially sending random data instead of the VirtQueue content.
Replace the otherwise unused VMSTATE_STRUCT_VARRAY_KNOWN with a
VMSTATE_STRUCT_VARRAY_POINTER_KNOWN that includes the VMS_POINTER flag
(so now actually doing what it advertises) and use it in the virtio
migration code.
Fixes and description as per Sascha's suggestions/debug.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reported-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Tested-By: Sascha Silbe <silbe@linux.vnet.ibm.com>
Reviewed-By: Sascha Silbe <silbe@linux.vnet.ibm.com>
Fixes: 50e5ae4dc3e4f21e874512f9e87b93b5472d26e0
Fixes: 2cf0148674430b6693c60d42b7eef721bfa9509f
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'hw/virtio')
-rw-r--r-- | hw/virtio/virtio.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 63a7b6d..0603793 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -1143,8 +1143,8 @@ static const VMStateDescription vmstate_virtio_virtqueues = { .minimum_version_id = 1, .needed = &virtio_virtqueue_needed, .fields = (VMStateField[]) { - VMSTATE_STRUCT_VARRAY_KNOWN(vq, struct VirtIODevice, VIRTIO_QUEUE_MAX, - 0, vmstate_virtqueue, VirtQueue), + VMSTATE_STRUCT_VARRAY_POINTER_KNOWN(vq, struct VirtIODevice, + VIRTIO_QUEUE_MAX, 0, vmstate_virtqueue, VirtQueue), VMSTATE_END_OF_LIST() } }; @@ -1165,8 +1165,8 @@ static const VMStateDescription vmstate_virtio_ringsize = { .minimum_version_id = 1, .needed = &virtio_ringsize_needed, .fields = (VMStateField[]) { - VMSTATE_STRUCT_VARRAY_KNOWN(vq, struct VirtIODevice, VIRTIO_QUEUE_MAX, - 0, vmstate_ringsize, VirtQueue), + VMSTATE_STRUCT_VARRAY_POINTER_KNOWN(vq, struct VirtIODevice, + VIRTIO_QUEUE_MAX, 0, vmstate_ringsize, VirtQueue), VMSTATE_END_OF_LIST() } }; |