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[PATCH 03/18] vhost_net: do not assume nvqs is always 2

Jason Wang posted 18 patches 4 years, 7 months ago
Maintainers: Jason Wang <jasowang@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>
There is a newer version of this series
[PATCH 03/18] vhost_net: do not assume nvqs is always 2
Posted by Jason Wang 4 years, 7 months ago 
This patch switches to initialize dev.nvqs from the VhostNetOptions
instead of assuming it was 2. This is useful for implementing control
virtqueue support which will be a single vhost_net structure with a
single cvq.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 hw/net/vhost_net.c      | 2 +-
 include/net/vhost_net.h | 1 +
 net/tap.c               | 1 +
 net/vhost-user.c        | 1 +
 net/vhost-vdpa.c        | 1 +
 5 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index 6bd4184f96..ef1370bd92 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -163,9 +163,9 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
         goto fail;
     }
     net->nc = options->net_backend;
+    net->dev.nvqs = options->nvqs;
 
     net->dev.max_queues = 1;
-    net->dev.nvqs = 2;
     net->dev.vqs = net->vqs;
 
     if (backend_kernel) {
diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
index 172b0051d8..fba40cf695 100644
--- a/include/net/vhost_net.h
+++ b/include/net/vhost_net.h
@@ -14,6 +14,7 @@ typedef struct VhostNetOptions {
     VhostBackendType backend_type;
     NetClientState *net_backend;
     uint32_t busyloop_timeout;
+    unsigned int nvqs;
     void *opaque;
 } VhostNetOptions;
 
diff --git a/net/tap.c b/net/tap.c
index f5686bbf77..f716be3e3f 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -749,6 +749,7 @@ static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
             qemu_set_nonblock(vhostfd);
         }
         options.opaque = (void *)(uintptr_t)vhostfd;
+        options.nvqs = 2;
 
         s->vhost_net = vhost_net_init(&options);
         if (!s->vhost_net) {
diff --git a/net/vhost-user.c b/net/vhost-user.c
index ffbd94d944..b93918c5a4 100644
--- a/net/vhost-user.c
+++ b/net/vhost-user.c
@@ -85,6 +85,7 @@ static int vhost_user_start(int queues, NetClientState *ncs[],
         options.net_backend = ncs[i];
         options.opaque      = be;
         options.busyloop_timeout = 0;
+        options.nvqs = 2;
         net = vhost_net_init(&options);
         if (!net) {
             error_report("failed to init vhost_net for queue %d", i);
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 19187dce8c..18b45ad777 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -105,6 +105,7 @@ static int vhost_vdpa_add(NetClientState *ncs, void *be)
     options.net_backend = ncs;
     options.opaque      = be;
     options.busyloop_timeout = 0;
+    options.nvqs = 2;
 
     net = vhost_net_init(&options);
     if (!net) {
-- 
2.25.1
Re: [PATCH 03/18] vhost_net: do not assume nvqs is always 2
Posted by Stefano Garzarella 4 years, 7 months ago 
On Mon, Jun 21, 2021 at 12:16:35PM +0800, Jason Wang wrote:
>This patch switches to initialize dev.nvqs from the VhostNetOptions
>instead of assuming it was 2. This is useful for implementing control
>virtqueue support which will be a single vhost_net structure with a
>single cvq.
>
>Signed-off-by: Jason Wang <jasowang@redhat.com>
>---
> hw/net/vhost_net.c      | 2 +-
> include/net/vhost_net.h | 1 +
> net/tap.c               | 1 +
> net/vhost-user.c        | 1 +
> net/vhost-vdpa.c        | 1 +
> 5 files changed, 5 insertions(+), 1 deletion(-)
>
>diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
>index 6bd4184f96..ef1370bd92 100644
>--- a/hw/net/vhost_net.c
>+++ b/hw/net/vhost_net.c
>@@ -163,9 +163,9 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
>         goto fail;
>     }
>     net->nc = options->net_backend;
>+    net->dev.nvqs = options->nvqs;
>
>     net->dev.max_queues = 1;
>-    net->dev.nvqs = 2;
>     net->dev.vqs = net->vqs;
>
>     if (backend_kernel) {
>diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
>index 172b0051d8..fba40cf695 100644
>--- a/include/net/vhost_net.h
>+++ b/include/net/vhost_net.h
>@@ -14,6 +14,7 @@ typedef struct VhostNetOptions {
>     VhostBackendType backend_type;
>     NetClientState *net_backend;
>     uint32_t busyloop_timeout;
>+    unsigned int nvqs;
>     void *opaque;
> } VhostNetOptions;
>
>diff --git a/net/tap.c b/net/tap.c
>index f5686bbf77..f716be3e3f 100644
>--- a/net/tap.c
>+++ b/net/tap.c
>@@ -749,6 +749,7 @@ static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
>             qemu_set_nonblock(vhostfd);
>         }
>         options.opaque = (void *)(uintptr_t)vhostfd;
>+        options.nvqs = 2;
>
>         s->vhost_net = vhost_net_init(&options);
>         if (!s->vhost_net) {
>diff --git a/net/vhost-user.c b/net/vhost-user.c
>index ffbd94d944..b93918c5a4 100644
>--- a/net/vhost-user.c
>+++ b/net/vhost-user.c
>@@ -85,6 +85,7 @@ static int vhost_user_start(int queues, NetClientState *ncs[],
>         options.net_backend = ncs[i];
>         options.opaque      = be;
>         options.busyloop_timeout = 0;
>+        options.nvqs = 2;
>         net = vhost_net_init(&options);
>         if (!net) {
>             error_report("failed to init vhost_net for queue %d", i);
>diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
>index 19187dce8c..18b45ad777 100644
>--- a/net/vhost-vdpa.c
>+++ b/net/vhost-vdpa.c
>@@ -105,6 +105,7 @@ static int vhost_vdpa_add(NetClientState *ncs, void *be)
>     options.net_backend = ncs;
>     options.opaque      = be;
>     options.busyloop_timeout = 0;
>+    options.nvqs = 2;
>
>     net = vhost_net_init(&options);
>     if (!net) {
>-- 
>2.25.1
>
>

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Re: [PATCH 03/18] vhost_net: do not assume nvqs is always 2
Posted by Eli Cohen 4 years, 7 months ago 
On Mon, Jun 21, 2021 at 12:16:35PM +0800, Jason Wang wrote:
> This patch switches to initialize dev.nvqs from the VhostNetOptions
> instead of assuming it was 2. This is useful for implementing control
> virtqueue support which will be a single vhost_net structure with a
> single cvq.

Maybe worth mentioning in the changelog that nvqs is still set to 2 for
all users and this patch does not change functionality.

Reviewed-by: Eli Cohen <elic@nvidia.com>

> Signed-off-by: Jason Wang <jasowang@redhat.com>
> ---
>  hw/net/vhost_net.c      | 2 +-
>  include/net/vhost_net.h | 1 +
>  net/tap.c               | 1 +
>  net/vhost-user.c        | 1 +
>  net/vhost-vdpa.c        | 1 +
>  5 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
> index 6bd4184f96..ef1370bd92 100644
> --- a/hw/net/vhost_net.c
> +++ b/hw/net/vhost_net.c
> @@ -163,9 +163,9 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
>          goto fail;
>      }
>      net->nc = options->net_backend;
> +    net->dev.nvqs = options->nvqs;
>  
>      net->dev.max_queues = 1;
> -    net->dev.nvqs = 2;
>      net->dev.vqs = net->vqs;
>  
>      if (backend_kernel) {
> diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
> index 172b0051d8..fba40cf695 100644
> --- a/include/net/vhost_net.h
> +++ b/include/net/vhost_net.h
> @@ -14,6 +14,7 @@ typedef struct VhostNetOptions {
>      VhostBackendType backend_type;
>      NetClientState *net_backend;
>      uint32_t busyloop_timeout;
> +    unsigned int nvqs;
>      void *opaque;
>  } VhostNetOptions;
>  
> diff --git a/net/tap.c b/net/tap.c
> index f5686bbf77..f716be3e3f 100644
> --- a/net/tap.c
> +++ b/net/tap.c
> @@ -749,6 +749,7 @@ static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
>              qemu_set_nonblock(vhostfd);
>          }
>          options.opaque = (void *)(uintptr_t)vhostfd;
> +        options.nvqs = 2;
>  
>          s->vhost_net = vhost_net_init(&options);
>          if (!s->vhost_net) {
> diff --git a/net/vhost-user.c b/net/vhost-user.c
> index ffbd94d944..b93918c5a4 100644
> --- a/net/vhost-user.c
> +++ b/net/vhost-user.c
> @@ -85,6 +85,7 @@ static int vhost_user_start(int queues, NetClientState *ncs[],
>          options.net_backend = ncs[i];
>          options.opaque      = be;
>          options.busyloop_timeout = 0;
> +        options.nvqs = 2;
>          net = vhost_net_init(&options);
>          if (!net) {
>              error_report("failed to init vhost_net for queue %d", i);
> diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
> index 19187dce8c..18b45ad777 100644
> --- a/net/vhost-vdpa.c
> +++ b/net/vhost-vdpa.c
> @@ -105,6 +105,7 @@ static int vhost_vdpa_add(NetClientState *ncs, void *be)
>      options.net_backend = ncs;
>      options.opaque      = be;
>      options.busyloop_timeout = 0;
> +    options.nvqs = 2;
>  
>      net = vhost_net_init(&options);
>      if (!net) {
> -- 
> 2.25.1
>
Re: [PATCH 03/18] vhost_net: do not assume nvqs is always 2
Posted by Jason Wang 4 years, 7 months ago 
在 2021/6/24 下午2:22, Eli Cohen 写道:
> On Mon, Jun 21, 2021 at 12:16:35PM +0800, Jason Wang wrote:
>> This patch switches to initialize dev.nvqs from the VhostNetOptions
>> instead of assuming it was 2. This is useful for implementing control
>> virtqueue support which will be a single vhost_net structure with a
>> single cvq.
> Maybe worth mentioning in the changelog that nvqs is still set to 2 for
> all users and this patch does not change functionality.
>
> Reviewed-by: Eli Cohen <elic@nvidia.com>


Ok, will do that in V2.

Thanks


>
>> Signed-off-by: Jason Wang <jasowang@redhat.com>
>> ---
>>   hw/net/vhost_net.c      | 2 +-
>>   include/net/vhost_net.h | 1 +
>>   net/tap.c               | 1 +
>>   net/vhost-user.c        | 1 +
>>   net/vhost-vdpa.c        | 1 +
>>   5 files changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
>> index 6bd4184f96..ef1370bd92 100644
>> --- a/hw/net/vhost_net.c
>> +++ b/hw/net/vhost_net.c
>> @@ -163,9 +163,9 @@ struct vhost_net *vhost_net_init(VhostNetOptions *options)
>>           goto fail;
>>       }
>>       net->nc = options->net_backend;
>> +    net->dev.nvqs = options->nvqs;
>>   
>>       net->dev.max_queues = 1;
>> -    net->dev.nvqs = 2;
>>       net->dev.vqs = net->vqs;
>>   
>>       if (backend_kernel) {
>> diff --git a/include/net/vhost_net.h b/include/net/vhost_net.h
>> index 172b0051d8..fba40cf695 100644
>> --- a/include/net/vhost_net.h
>> +++ b/include/net/vhost_net.h
>> @@ -14,6 +14,7 @@ typedef struct VhostNetOptions {
>>       VhostBackendType backend_type;
>>       NetClientState *net_backend;
>>       uint32_t busyloop_timeout;
>> +    unsigned int nvqs;
>>       void *opaque;
>>   } VhostNetOptions;
>>   
>> diff --git a/net/tap.c b/net/tap.c
>> index f5686bbf77..f716be3e3f 100644
>> --- a/net/tap.c
>> +++ b/net/tap.c
>> @@ -749,6 +749,7 @@ static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
>>               qemu_set_nonblock(vhostfd);
>>           }
>>           options.opaque = (void *)(uintptr_t)vhostfd;
>> +        options.nvqs = 2;
>>   
>>           s->vhost_net = vhost_net_init(&options);
>>           if (!s->vhost_net) {
>> diff --git a/net/vhost-user.c b/net/vhost-user.c
>> index ffbd94d944..b93918c5a4 100644
>> --- a/net/vhost-user.c
>> +++ b/net/vhost-user.c
>> @@ -85,6 +85,7 @@ static int vhost_user_start(int queues, NetClientState *ncs[],
>>           options.net_backend = ncs[i];
>>           options.opaque      = be;
>>           options.busyloop_timeout = 0;
>> +        options.nvqs = 2;
>>           net = vhost_net_init(&options);
>>           if (!net) {
>>               error_report("failed to init vhost_net for queue %d", i);
>> diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
>> index 19187dce8c..18b45ad777 100644
>> --- a/net/vhost-vdpa.c
>> +++ b/net/vhost-vdpa.c
>> @@ -105,6 +105,7 @@ static int vhost_vdpa_add(NetClientState *ncs, void *be)
>>       options.net_backend = ncs;
>>       options.opaque      = be;
>>       options.busyloop_timeout = 0;
>> +    options.nvqs = 2;
>>   
>>       net = vhost_net_init(&options);
>>       if (!net) {
>> -- 
>> 2.25.1
>>

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