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virtio-scsi: prepare migration format for multiqueue

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In order to restore requests correctly from a multitude of virtqueues,
we need to store the id of the request queue that each request came
from.

Do this even for single-queue, by storing a hard-coded zero, to
simplify future implementation of multiqueue.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-04-06 10:20:43 +02:00
parent b7c8c35f0a
commit fcf104a74c
1 changed files with 5 additions and 0 deletions
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5
hw/virtio-scsi.c
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@ -240,7 +240,9 @@ static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq)
static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq)
{
VirtIOSCSIReq *req = sreq->hba_private;
uint32_t n = 0;
qemu_put_be32s(f, &n);
qemu_put_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem));
}
@ -249,8 +251,11 @@ static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq)
SCSIBus *bus = sreq->bus;
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus);
VirtIOSCSIReq *req;
uint32_t n;
req = g_malloc(sizeof(*req));
qemu_get_be32s(f, &n);
assert(n == 0);
qemu_get_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem));
virtio_scsi_parse_req(s, s->cmd_vq, req);