Re: [Qemu-devel] [PATCH v2 5/5] [HACK] Handle multiple virtio aliases.

[Anthony Liguori <aliguori@us.ibm.com>]

Cornelia Huck <cornelia.huck@de.ibm.com> writes:

> This patch enables using both virtio-xxx-s390 and virtio-xxx-ccw
> by making the alias lookup code verify that a driver is actually
> registered.
>
> (Only included in order to allow testing of virtio-ccw; should be
> replaced by cleaning up the virtio bus model.)
>
> Not-signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

No more aliases.  Just drop the whole thing.

Regards,

Anthony Liguori

> ---
>  blockdev.c        |  6 +---
>  hw/qdev-monitor.c | 85 +++++++++++++++++++++++++++++++++----------------------
>  vl.c              |  6 +---
>  3 files changed, 53 insertions(+), 44 deletions(-)
>
> diff --git a/blockdev.c b/blockdev.c
> index 7c83baa..a7c39b6 100644
> --- a/blockdev.c
> +++ b/blockdev.c
> @@ -560,11 +560,7 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
>      case IF_VIRTIO:
>          /* add virtio block device */
>          opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, NULL);
> -        if (arch_type == QEMU_ARCH_S390X) {
> -            qemu_opt_set(opts, "driver", "virtio-blk-s390");
> -        } else {
> -            qemu_opt_set(opts, "driver", "virtio-blk-pci");
> -        }
> +        qemu_opt_set(opts, "driver", "virtio-blk");
>          qemu_opt_set(opts, "drive", dinfo->id);
>          if (devaddr)
>              qemu_opt_set(opts, "addr", devaddr);
> diff --git a/hw/qdev-monitor.c b/hw/qdev-monitor.c
> index 92b7c59..9245a1e 100644
> --- a/hw/qdev-monitor.c
> +++ b/hw/qdev-monitor.c
> @@ -118,9 +118,53 @@ static int set_property(const char *name, const char *value, void *opaque)
>      return 0;
>  }
>  
> -static const char *find_typename_by_alias(const char *alias)
> +static BusState *qbus_find_recursive(BusState *bus, const char *name,
> +                                     const char *bus_typename)
> +{
> +    BusChild *kid;
> +    BusState *child, *ret;
> +    int match = 1;
> +
> +    if (name && (strcmp(bus->name, name) != 0)) {
> +        match = 0;
> +    }
> +    if (bus_typename &&
> +        (strcmp(object_get_typename(OBJECT(bus)), bus_typename) != 0)) {
> +        match = 0;
> +    }
> +    if (match) {
> +        return bus;
> +    }
> +
> +    QTAILQ_FOREACH(kid, &bus->children, sibling) {
> +        DeviceState *dev = kid->child;
> +        QLIST_FOREACH(child, &dev->child_bus, sibling) {
> +            ret = qbus_find_recursive(child, name, bus_typename);
> +            if (ret) {
> +                return ret;
> +            }
> +        }
> +    }
> +    return NULL;
> +}
> +
> +static bool qdev_verify_bus(DeviceClass *dc)
> +{
> +    BusState *bus;
> +
> +    if (dc) {
> +        bus = qbus_find_recursive(sysbus_get_default(), NULL, dc->bus_type);
> +        if (bus) {
> +            return true;
> +        }
> +    }
> +    return false;
> +}
> +
> +static const char *find_typename_by_alias(const char *alias, bool check_bus)
>  {
>      int i;
> +    ObjectClass *oc;
>  
>      for (i = 0; qdev_alias_table[i].alias; i++) {
>          if (qdev_alias_table[i].arch_mask &&
> @@ -129,7 +173,10 @@ static const char *find_typename_by_alias(const char *alias)
>          }
>  
>          if (strcmp(qdev_alias_table[i].alias, alias) == 0) {
> -            return qdev_alias_table[i].typename;
> +            oc = object_class_by_name(qdev_alias_table[i].typename);
> +            if (oc && (!check_bus || qdev_verify_bus(DEVICE_CLASS(oc)))) {
> +                return qdev_alias_table[i].typename;
> +            }
>          }
>      }
>  
> @@ -155,7 +202,7 @@ int qdev_device_help(QemuOpts *opts)
>  
>      klass = object_class_by_name(driver);
>      if (!klass) {
> -        const char *typename = find_typename_by_alias(driver);
> +        const char *typename = find_typename_by_alias(driver, false);
>  
>          if (typename) {
>              driver = typename;
> @@ -283,36 +330,6 @@ static DeviceState *qbus_find_dev(BusState *bus, char *elem)
>      return NULL;
>  }
>  
> -static BusState *qbus_find_recursive(BusState *bus, const char *name,
> -                                     const char *bus_typename)
> -{
> -    BusChild *kid;
> -    BusState *child, *ret;
> -    int match = 1;
> -
> -    if (name && (strcmp(bus->name, name) != 0)) {
> -        match = 0;
> -    }
> -    if (bus_typename &&
> -        (strcmp(object_get_typename(OBJECT(bus)), bus_typename) != 0)) {
> -        match = 0;
> -    }
> -    if (match) {
> -        return bus;
> -    }
> -
> -    QTAILQ_FOREACH(kid, &bus->children, sibling) {
> -        DeviceState *dev = kid->child;
> -        QLIST_FOREACH(child, &dev->child_bus, sibling) {
> -            ret = qbus_find_recursive(child, name, bus_typename);
> -            if (ret) {
> -                return ret;
> -            }
> -        }
> -    }
> -    return NULL;
> -}
> -
>  static BusState *qbus_find(const char *path)
>  {
>      DeviceState *dev;
> @@ -417,7 +434,7 @@ DeviceState *qdev_device_add(QemuOpts *opts)
>      /* find driver */
>      obj = object_class_by_name(driver);
>      if (!obj) {
> -        const char *typename = find_typename_by_alias(driver);
> +        const char *typename = find_typename_by_alias(driver, true);
>  
>          if (typename) {
>              driver = typename;
> diff --git a/vl.c b/vl.c
> index 2b8cae6..788a536 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2113,11 +2113,7 @@ static int virtcon_parse(const char *devname)
>      }
>  
>      bus_opts = qemu_opts_create(device, NULL, 0, NULL);
> -    if (arch_type == QEMU_ARCH_S390X) {
> -        qemu_opt_set(bus_opts, "driver", "virtio-serial-s390");
> -    } else {
> -        qemu_opt_set(bus_opts, "driver", "virtio-serial-pci");
> -    } 
> +    qemu_opt_set(bus_opts, "driver", "virtio-serial");
>  
>      dev_opts = qemu_opts_create(device, NULL, 0, NULL);
>      qemu_opt_set(dev_opts, "driver", "virtconsole");
> -- 
> 1.7.11.5
>
> --
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