ca1ef1e62e
This patch is to reduce the number of Valgrind report messages about
using uninitialized memory with the null-co driver. It helps to filter
real memory issues and is the same work done for the iotests with the
commit ID a6862418fe.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Message-Id: <1564404360-733987-1-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
120 lines
3.9 KiB
C
120 lines
3.9 KiB
C
/*
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* libqos driver framework
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*
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* Copyright (c) 2018 Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>
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*/
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#include "qemu/osdep.h"
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#include "libqtest.h"
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#include "qemu/module.h"
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#include "standard-headers/linux/virtio_ids.h"
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#include "libqos/qgraph.h"
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#include "libqos/virtio-scsi.h"
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/* virtio-scsi-device */
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static void *qvirtio_scsi_get_driver(QVirtioSCSI *v_scsi,
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const char *interface)
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{
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if (!g_strcmp0(interface, "virtio-scsi")) {
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return v_scsi;
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}
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if (!g_strcmp0(interface, "virtio")) {
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return v_scsi->vdev;
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}
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fprintf(stderr, "%s not present in virtio-scsi-device\n", interface);
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g_assert_not_reached();
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}
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static void *qvirtio_scsi_device_get_driver(void *object,
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const char *interface)
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{
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QVirtioSCSIDevice *v_scsi = object;
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return qvirtio_scsi_get_driver(&v_scsi->scsi, interface);
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}
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static void *virtio_scsi_device_create(void *virtio_dev,
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QGuestAllocator *t_alloc,
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void *addr)
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{
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QVirtioSCSIDevice *virtio_bdevice = g_new0(QVirtioSCSIDevice, 1);
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QVirtioSCSI *interface = &virtio_bdevice->scsi;
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interface->vdev = virtio_dev;
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virtio_bdevice->obj.get_driver = qvirtio_scsi_device_get_driver;
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return &virtio_bdevice->obj;
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}
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/* virtio-scsi-pci */
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static void *qvirtio_scsi_pci_get_driver(void *object,
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const char *interface)
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{
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QVirtioSCSIPCI *v_scsi = object;
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if (!g_strcmp0(interface, "pci-device")) {
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return v_scsi->pci_vdev.pdev;
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}
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return qvirtio_scsi_get_driver(&v_scsi->scsi, interface);
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}
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static void *virtio_scsi_pci_create(void *pci_bus,
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QGuestAllocator *t_alloc,
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void *addr)
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{
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QVirtioSCSIPCI *virtio_spci = g_new0(QVirtioSCSIPCI, 1);
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QVirtioSCSI *interface = &virtio_spci->scsi;
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QOSGraphObject *obj = &virtio_spci->pci_vdev.obj;
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virtio_pci_init(&virtio_spci->pci_vdev, pci_bus, addr);
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interface->vdev = &virtio_spci->pci_vdev.vdev;
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g_assert_cmphex(interface->vdev->device_type, ==, VIRTIO_ID_SCSI);
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obj->get_driver = qvirtio_scsi_pci_get_driver;
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return obj;
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}
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static void virtio_scsi_register_nodes(void)
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{
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QPCIAddress addr = {
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.devfn = QPCI_DEVFN(4, 0),
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};
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QOSGraphEdgeOptions opts = {
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.before_cmd_line = "-drive id=drv0,if=none,file=null-co://,"
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"file.read-zeroes=on,format=raw",
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.after_cmd_line = "-device scsi-hd,bus=vs0.0,drive=drv0",
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};
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/* virtio-scsi-device */
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opts.extra_device_opts = "id=vs0";
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qos_node_create_driver("virtio-scsi-device",
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virtio_scsi_device_create);
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qos_node_consumes("virtio-scsi-device", "virtio-bus", &opts);
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qos_node_produces("virtio-scsi-device", "virtio-scsi");
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/* virtio-scsi-pci */
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opts.extra_device_opts = "id=vs0,addr=04.0";
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add_qpci_address(&opts, &addr);
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qos_node_create_driver("virtio-scsi-pci", virtio_scsi_pci_create);
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qos_node_consumes("virtio-scsi-pci", "pci-bus", &opts);
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qos_node_produces("virtio-scsi-pci", "pci-device");
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qos_node_produces("virtio-scsi-pci", "virtio-scsi");
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}
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libqos_init(virtio_scsi_register_nodes);
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