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From c732ec0ec457f0cb003b3b1db56c0bd96432baac Mon Sep 17 00:00:00 2001
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From: Stefan Hajnoczi <stefanha@redhat.com>
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Date: Mon, 3 Aug 2015 16:51:19 +0200
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Subject: [PATCH 05/13] virtio-scsi: use virtqueue_map_sg() when loading
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requests
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Message-id: <1438620680-24121-2-git-send-email-stefanha@redhat.com>
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Patchwork-id: 67255
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O-Subject: [RHEL-7.2 qemu-kvm PATCH 1/2] virtio-scsi: use virtqueue_map_sg() when loading requests
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Bugzilla: 1249718
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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The VirtQueueElement struct is serialized during migration but the
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in_sg[]/out_sg[] iovec arrays are not usable on the destination host
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because the pointers are meaningless.
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Use virtqueue_map_sg() to refresh in_sg[]/out_sg[] to valid pointers
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based on in_addr[]/out_addr[] hwaddrs.
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Cc: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Message-Id: <1438262173-11546-2-git-send-email-stefanha@redhat.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 1cc933453bf2baae1feb7c8e757bdfd0ef639002)
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Conficts:
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* Context conflict because upstream has error handling code for
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virtio_scsi_parse_req().
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/scsi/virtio-scsi.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
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index cda8f8a..8232fc9 100644
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--- a/hw/scsi/virtio-scsi.c
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+++ b/hw/scsi/virtio-scsi.c
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@@ -154,6 +154,12 @@ static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq)
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#endif
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assert(req->elem.in_num <= ARRAY_SIZE(req->elem.in_sg));
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assert(req->elem.out_num <= ARRAY_SIZE(req->elem.out_sg));
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+
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+ virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr,
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+ req->elem.in_num, 1);
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+ virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr,
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+ req->elem.out_num, 0);
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+
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virtio_scsi_parse_req(s, vs->cmd_vqs[n], req);
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scsi_req_ref(sreq);
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--
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1.8.3.1
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