Re: [Qemu-devel] [PATCH v3 08/16] virtio: split vhost user scsi bits from virtio-pci

[Thomas Huth <thuth@redhat.com>]

On 2018-12-13 22:00, Juan Quintela wrote:
> Reviewed-by: Laurent Vivier <lvivier@redhat.com>
> Signed-off-by: Juan Quintela <quintela@redhat.com>
> ---
>  hw/virtio/Makefile.objs         |   1 +
>  hw/virtio/vhost-user-scsi-pci.c | 101 ++++++++++++++++++++++++++++++++
>  hw/virtio/virtio-pci.c          |  58 ------------------
>  hw/virtio/virtio-pci.h          |  11 ----
>  4 files changed, 102 insertions(+), 69 deletions(-)
>  create mode 100644 hw/virtio/vhost-user-scsi-pci.c
> 
> diff --git a/hw/virtio/Makefile.objs b/hw/virtio/Makefile.objs
> index 35b7698446..f851a6f2b5 100644
> --- a/hw/virtio/Makefile.objs
> +++ b/hw/virtio/Makefile.objs
> @@ -14,6 +14,7 @@ obj-$(CONFIG_VHOST_VSOCK) += vhost-vsock.o
>  ifeq ($(CONFIG_PCI),y)
>  obj-$(CONFIG_VHOST_VSOCK) += vhost-vsock-pci.o
>  obj-$(CONFIG_VHOST_USER_BLK) += vhost-user-blk-pci.o
> +obj-$(CONFIG_VHOST_USER_SCSI) += vhost-user-scsi-pci.o
>  obj-$(CONFIG_VIRTIO_INPUT_HOST) += virtio-input-host-pci.o
>  obj-$(CONFIG_VIRTIO_INPUT) += virtio-input-pci.o
>  obj-$(CONFIG_VIRTIO_RNG) += virtio-rng-pci.o
> diff --git a/hw/virtio/vhost-user-scsi-pci.c b/hw/virtio/vhost-user-scsi-pci.c
> new file mode 100644
> index 0000000000..5baec9c356
> --- /dev/null
> +++ b/hw/virtio/vhost-user-scsi-pci.c
> @@ -0,0 +1,101 @@
> +/*
> + * Vhost user scsi PCI Bindings
> + *
> + * Copyright (c) 2016 Nutanix Inc. All rights reserved.
> + *
> + * Author:
> + *  Felipe Franciosi <felipe@nutanix.com>
> + *
> + * This work is largely based on the "vhost-scsi" implementation by:
> + *  Stefan Hajnoczi    <stefanha@linux.vnet.ibm.com>
> + *  Nicholas Bellinger <nab@risingtidesystems.com>
> + *
> + * This work is licensed under the terms of the GNU LGPL, version 2 or later.
> + * See the COPYING.LIB file in the top-level directory.

Not sure whether this should be LGPL (since hw/scsi/vhost-user-scsi.c is
LGPL, too) or GPLv2+ (since the original code in the file
hw/virtio/virtio-pci.c is GPLv2+) ... Felipe, any preferences?

NB: "LGPL, version 2" is also inaccurate. According to our COPYING.LIB
file which is referenced in the comment, we are using version 2.1 ...

> + */
> +
> +#include "qemu/osdep.h"
> +
> +#include "standard-headers/linux/virtio_pci.h"
> +#include "hw/virtio/vhost-user-scsi.h"
> +#include "hw/virtio/virtio.h"
> +#include "hw/virtio/virtio-scsi.h"
> +#include "hw/pci/pci.h"
> +#include "qapi/error.h"
> +#include "qemu/error-report.h"
> +#include "hw/pci/msi.h"
> +#include "hw/pci/msix.h"
> +#include "hw/loader.h"
> +#include "sysemu/kvm.h"
> +#include "virtio-pci.h"
> +
> +typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
> +
> +#define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci"
> +#define VHOST_USER_SCSI_PCI(obj) \
> +        OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI)
> +
> +struct VHostUserSCSIPCI {
> +    VirtIOPCIProxy parent_obj;
> +    VHostUserSCSI vdev;
> +};
> +
> +static Property vhost_user_scsi_pci_properties[] = {
> +    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
> +                       DEV_NVECTORS_UNSPECIFIED),
> +    DEFINE_PROP_END_OF_LIST(),
> +};
> +
> +static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
> +{
> +    VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
> +    DeviceState *vdev = DEVICE(&dev->vdev);
> +    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
> +
> +    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
> +        vpci_dev->nvectors = vs->conf.num_queues + 3;
> +    }
> +
> +    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
> +    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
> +}
> +
> +static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data)
> +{
> +    DeviceClass *dc = DEVICE_CLASS(klass);
> +    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
> +    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
> +    k->realize = vhost_user_scsi_pci_realize;
> +    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
> +    dc->props = vhost_user_scsi_pci_properties;
> +    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
> +    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
> +    pcidev_k->revision = 0x00;
> +    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
> +}
> +
> +static void vhost_user_scsi_pci_instance_init(Object *obj)
> +{
> +    VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
> +
> +    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
> +                                TYPE_VHOST_USER_SCSI);
> +    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
> +                              "bootindex", &error_abort);
> +}
> +
> +static const TypeInfo vhost_user_scsi_pci_info = {
> +    .name          = TYPE_VHOST_USER_SCSI_PCI,
> +    .parent        = TYPE_VIRTIO_PCI,
> +    .instance_size = sizeof(VHostUserSCSIPCI),
> +    .instance_init = vhost_user_scsi_pci_instance_init,
> +    .class_init    = vhost_user_scsi_pci_class_init,
> +};
> +
> +static void vhost_user_scsi_pci_register(void)
> +{
> +    type_register_static(&vhost_user_scsi_pci_info);
> +}
> +
> +type_init(vhost_user_scsi_pci_register)
> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> index e9c562b1c0..7c99d9385a 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -2075,61 +2075,6 @@ static const TypeInfo vhost_scsi_pci_info = {
>  };
>  #endif
>  
> -#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
> -/* vhost-user-scsi-pci */
> -static Property vhost_user_scsi_pci_properties[] = {
> -    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
> -                       DEV_NVECTORS_UNSPECIFIED),
> -    DEFINE_PROP_END_OF_LIST(),
> -};
> -
> -static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
> -{
> -    VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev);
> -    DeviceState *vdev = DEVICE(&dev->vdev);
> -    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
> -
> -    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
> -        vpci_dev->nvectors = vs->conf.num_queues + 3;
> -    }
> -
> -    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
> -    object_property_set_bool(OBJECT(vdev), true, "realized", errp);
> -}
> -
> -static void vhost_user_scsi_pci_class_init(ObjectClass *klass, void *data)
> -{
> -    DeviceClass *dc = DEVICE_CLASS(klass);
> -    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
> -    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
> -    k->realize = vhost_user_scsi_pci_realize;
> -    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
> -    dc->props = vhost_user_scsi_pci_properties;
> -    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
> -    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
> -    pcidev_k->revision = 0x00;
> -    pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
> -}
> -
> -static void vhost_user_scsi_pci_instance_init(Object *obj)
> -{
> -    VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(obj);
> -
> -    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
> -                                TYPE_VHOST_USER_SCSI);
> -    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
> -                              "bootindex", &error_abort);
> -}
> -
> -static const TypeInfo vhost_user_scsi_pci_info = {
> -    .name          = TYPE_VHOST_USER_SCSI_PCI,
> -    .parent        = TYPE_VIRTIO_PCI,
> -    .instance_size = sizeof(VHostUserSCSIPCI),
> -    .instance_init = vhost_user_scsi_pci_instance_init,
> -    .class_init    = vhost_user_scsi_pci_class_init,
> -};
> -#endif
> -
>  /* virtio-serial-pci */
>  
>  static void virtio_serial_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
> @@ -2314,9 +2259,6 @@ static void virtio_pci_register_types(void)
>  #ifdef CONFIG_VHOST_SCSI
>      type_register_static(&vhost_scsi_pci_info);
>  #endif
> -#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
> -    type_register_static(&vhost_user_scsi_pci_info);
> -#endif
>  }
>  
>  type_init(virtio_pci_register_types)