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Re: [Qemu-devel] [PATCH 2/2] virtio-scsi: Implement fc_host feature


From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] [PATCH 2/2] virtio-scsi: Implement fc_host feature
Date: Tue, 17 Jan 2017 10:54:05 +0000
User-agent: Mutt/1.7.1 (2016-10-04)

On Tue, Jan 17, 2017 at 12:07:30AM +0800, Fam Zheng wrote:
>  static void virtio_scsi_device_realize(DeviceState *dev, Error **errp)
>  {
>      VirtIODevice *vdev = VIRTIO_DEVICE(dev);
>      VirtIOSCSI *s = VIRTIO_SCSI(dev);
> +    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
>      Error *err = NULL;
>  
> +    if (vs->conf.fc_host) {
> +        if (!strcmp(vs->conf.fc_host, "off")) {
> +            vs->conf.primary_wwpn = 0;
> +            vs->conf.primary_wwnn = 0;
> +            vs->conf.secondary_wwpn = 0;
> +            vs->conf.secondary_wwnn = 0;
> +        } else if (!strcmp(vs->conf.fc_host, "primary") ||
> +                   !strcmp(vs->conf.fc_host, "secondary")) {
> +            virtio_add_feature(&vdev->host_features, VIRTIO_SCSI_F_FC_HOST);
> +            vs->conf.primary_active = !strcmp(vs->conf.fc_host, "primary");
> +            if (!vs->conf.primary_wwpn) {
> +                error_setg(errp, "fc_host enabled but primary_wwpn not set");
> +                return;
> +            }
> +            if (!vs->conf.primary_wwnn) {
> +                error_setg(errp, "fc_host enabled but primary_wwnn not set");
> +                return;
> +            }
> +            if (!vs->conf.secondary_wwpn) {
> +                error_setg(errp, "fc_host enabled but secondary_wwpn not 
> set");
> +                return;
> +            }
> +            if (!vs->conf.secondary_wwnn) {
> +                error_setg(errp, "fc_host enabled but secondary_wwnn not 
> set");
> +                return;
> +            }
> +            s->vm_state_change =
> +                
> qemu_add_vm_change_state_handler(virtio_scsi_vm_state_change, s);

Missing qemu_del_vm_change_state_handler() in .unrealize() and in error
code paths in this function.

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