* [PATCH] virtio_pci: modify ENOENT to EINVAL
@ 2022-11-01 11:16 Angus Chen
2022-11-02 5:34 ` Jason Wang
0 siblings, 1 reply; 6+ messages in thread
From: Angus Chen @ 2022-11-01 11:16 UTC (permalink / raw)
To: jasowang, mst; +Cc: virtualization, linux-kernel, lingshan.zhu, Angus Chen
Virtio_crypto use max_data_queues+1 to setup vqs,
we use vp_modern_get_num_queues to protect the vq range in setup_vq.
We could enter index >= vp_modern_get_num_queues(mdev) in setup_vq
if common->num_queues is not set well,and it return -ENOENT.
It is better to use -EINVAL instead.
Signed-off-by: Angus Chen <angus.chen@jaguarmicro.com>
---
drivers/virtio/virtio_pci_modern.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index c3b9f2761849..edf2e18014cd 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -303,7 +303,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
int err;
if (index >= vp_modern_get_num_queues(mdev))
- return ERR_PTR(-ENOENT);
+ return ERR_PTR(-EINVAL);
/* Check if queue is either not available or already active. */
num = vp_modern_get_queue_size(mdev, index);
--
2.25.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH] virtio_pci: modify ENOENT to EINVAL
2022-11-01 11:16 [PATCH] virtio_pci: modify ENOENT to EINVAL Angus Chen
@ 2022-11-02 5:34 ` Jason Wang
2022-11-10 3:30 ` Angus Chen
0 siblings, 1 reply; 6+ messages in thread
From: Jason Wang @ 2022-11-02 5:34 UTC (permalink / raw)
To: Angus Chen; +Cc: mst, virtualization, linux-kernel, lingshan.zhu
On Tue, Nov 1, 2022 at 7:17 PM Angus Chen <angus.chen@jaguarmicro.com> wrote:
>
> Virtio_crypto use max_data_queues+1 to setup vqs,
> we use vp_modern_get_num_queues to protect the vq range in setup_vq.
> We could enter index >= vp_modern_get_num_queues(mdev) in setup_vq
> if common->num_queues is not set well,and it return -ENOENT.
> It is better to use -EINVAL instead.
I'm not sure I get this. It would be better to describe:
1) what kind of issues can we see if we return -ENOENT
2) why -EINVAL can help in this case
Thanks
>
> Signed-off-by: Angus Chen <angus.chen@jaguarmicro.com>
> ---
> drivers/virtio/virtio_pci_modern.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
> index c3b9f2761849..edf2e18014cd 100644
> --- a/drivers/virtio/virtio_pci_modern.c
> +++ b/drivers/virtio/virtio_pci_modern.c
> @@ -303,7 +303,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
> int err;
>
> if (index >= vp_modern_get_num_queues(mdev))
> - return ERR_PTR(-ENOENT);
> + return ERR_PTR(-EINVAL);
>
> /* Check if queue is either not available or already active. */
> num = vp_modern_get_queue_size(mdev, index);
> --
> 2.25.1
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: [PATCH] virtio_pci: modify ENOENT to EINVAL
2022-11-02 5:34 ` Jason Wang
@ 2022-11-10 3:30 ` Angus Chen
2022-11-10 3:47 ` Jason Wang
2022-11-10 5:04 ` Michael S. Tsirkin
0 siblings, 2 replies; 6+ messages in thread
From: Angus Chen @ 2022-11-10 3:30 UTC (permalink / raw)
To: Jason Wang; +Cc: mst, virtualization, linux-kernel, lingshan.zhu
Hi Jason.
> -----Original Message-----
> From: Jason Wang <jasowang@redhat.com>
> Sent: Wednesday, November 2, 2022 1:34 PM
> To: Angus Chen <angus.chen@jaguarmicro.com>
> Cc: mst@redhat.com; virtualization@lists.linux-foundation.org;
> linux-kernel@vger.kernel.org; lingshan.zhu@intel.com
> Subject: Re: [PATCH] virtio_pci: modify ENOENT to EINVAL
>
> On Tue, Nov 1, 2022 at 7:17 PM Angus Chen <angus.chen@jaguarmicro.com>
> wrote:
> >
> > Virtio_crypto use max_data_queues+1 to setup vqs,
> > we use vp_modern_get_num_queues to protect the vq range in setup_vq.
> > We could enter index >= vp_modern_get_num_queues(mdev) in setup_vq
> > if common->num_queues is not set well,and it return -ENOENT.
> > It is better to use -EINVAL instead.
>
> I'm not sure I get this. It would be better to describe:
>
> 1) what kind of issues can we see if we return -ENOENT
> 2) why -EINVAL can help in this case
>
> Thanks
Thank you for your reply.
We use a robot to test our dpu to get the return value of probe.
We often get ENOENT form ' setup_vq ' function because of device error.
Most of time, my device can't handle queue_enable well.
This time,we get 'ENOENT' because the device set max_data_queues bigger than num_queues.
I think EINVAL is used when the value of some parameter is wrong.
Btw,it not a big deal,I can modify the robot to workaround.
>
> >
> > Signed-off-by: Angus Chen <angus.chen@jaguarmicro.com>
> > ---
> > drivers/virtio/virtio_pci_modern.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/virtio/virtio_pci_modern.c
> b/drivers/virtio/virtio_pci_modern.c
> > index c3b9f2761849..edf2e18014cd 100644
> > --- a/drivers/virtio/virtio_pci_modern.c
> > +++ b/drivers/virtio/virtio_pci_modern.c
> > @@ -303,7 +303,7 @@ static struct virtqueue *setup_vq(struct
> virtio_pci_device *vp_dev,
> > int err;
> >
> > if (index >= vp_modern_get_num_queues(mdev))
> > - return ERR_PTR(-ENOENT);
> > + return ERR_PTR(-EINVAL);
> >
> > /* Check if queue is either not available or already active. */
> > num = vp_modern_get_queue_size(mdev, index);
> > --
> > 2.25.1
> >
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] virtio_pci: modify ENOENT to EINVAL
2022-11-10 3:30 ` Angus Chen
@ 2022-11-10 3:47 ` Jason Wang
2022-11-10 5:04 ` Michael S. Tsirkin
1 sibling, 0 replies; 6+ messages in thread
From: Jason Wang @ 2022-11-10 3:47 UTC (permalink / raw)
To: Angus Chen; +Cc: mst, virtualization, linux-kernel, lingshan.zhu
On Thu, Nov 10, 2022 at 11:31 AM Angus Chen <angus.chen@jaguarmicro.com> wrote:
>
> Hi Jason.
>
> > -----Original Message-----
> > From: Jason Wang <jasowang@redhat.com>
> > Sent: Wednesday, November 2, 2022 1:34 PM
> > To: Angus Chen <angus.chen@jaguarmicro.com>
> > Cc: mst@redhat.com; virtualization@lists.linux-foundation.org;
> > linux-kernel@vger.kernel.org; lingshan.zhu@intel.com
> > Subject: Re: [PATCH] virtio_pci: modify ENOENT to EINVAL
> >
> > On Tue, Nov 1, 2022 at 7:17 PM Angus Chen <angus.chen@jaguarmicro.com>
> > wrote:
> > >
> > > Virtio_crypto use max_data_queues+1 to setup vqs,
> > > we use vp_modern_get_num_queues to protect the vq range in setup_vq.
> > > We could enter index >= vp_modern_get_num_queues(mdev) in setup_vq
> > > if common->num_queues is not set well,and it return -ENOENT.
> > > It is better to use -EINVAL instead.
> >
> > I'm not sure I get this. It would be better to describe:
> >
> > 1) what kind of issues can we see if we return -ENOENT
> > 2) why -EINVAL can help in this case
> >
> > Thanks
> Thank you for your reply.
> We use a robot to test our dpu to get the return value of probe.
> We often get ENOENT form ' setup_vq ' function because of device error.
> Most of time, my device can't handle queue_enable well.
> This time,we get 'ENOENT' because the device set max_data_queues bigger than num_queues.
Ok, I see, ENOENT is not very popular on linux but I'm not sure it's
worth bothering.
>
> I think EINVAL is used when the value of some parameter is wrong.
> Btw,it not a big deal,I can modify the robot to workaround.
Btw, the error code is not a part of the ABI, so depending on that is
kind of fragile.
Thanks
>
> >
> > >
> > > Signed-off-by: Angus Chen <angus.chen@jaguarmicro.com>
> > > ---
> > > drivers/virtio/virtio_pci_modern.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/virtio/virtio_pci_modern.c
> > b/drivers/virtio/virtio_pci_modern.c
> > > index c3b9f2761849..edf2e18014cd 100644
> > > --- a/drivers/virtio/virtio_pci_modern.c
> > > +++ b/drivers/virtio/virtio_pci_modern.c
> > > @@ -303,7 +303,7 @@ static struct virtqueue *setup_vq(struct
> > virtio_pci_device *vp_dev,
> > > int err;
> > >
> > > if (index >= vp_modern_get_num_queues(mdev))
> > > - return ERR_PTR(-ENOENT);
> > > + return ERR_PTR(-EINVAL);
> > >
> > > /* Check if queue is either not available or already active. */
> > > num = vp_modern_get_queue_size(mdev, index);
> > > --
> > > 2.25.1
> > >
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] virtio_pci: modify ENOENT to EINVAL
2022-11-10 3:30 ` Angus Chen
2022-11-10 3:47 ` Jason Wang
@ 2022-11-10 5:04 ` Michael S. Tsirkin
2022-11-10 5:19 ` Jason Wang
1 sibling, 1 reply; 6+ messages in thread
From: Michael S. Tsirkin @ 2022-11-10 5:04 UTC (permalink / raw)
To: Angus Chen; +Cc: Jason Wang, virtualization, linux-kernel, lingshan.zhu
On Thu, Nov 10, 2022 at 03:30:59AM +0000, Angus Chen wrote:
> Hi Jason.
>
> > -----Original Message-----
> > From: Jason Wang <jasowang@redhat.com>
> > Sent: Wednesday, November 2, 2022 1:34 PM
> > To: Angus Chen <angus.chen@jaguarmicro.com>
> > Cc: mst@redhat.com; virtualization@lists.linux-foundation.org;
> > linux-kernel@vger.kernel.org; lingshan.zhu@intel.com
> > Subject: Re: [PATCH] virtio_pci: modify ENOENT to EINVAL
> >
> > On Tue, Nov 1, 2022 at 7:17 PM Angus Chen <angus.chen@jaguarmicro.com>
> > wrote:
> > >
> > > Virtio_crypto use max_data_queues+1 to setup vqs,
> > > we use vp_modern_get_num_queues to protect the vq range in setup_vq.
> > > We could enter index >= vp_modern_get_num_queues(mdev) in setup_vq
> > > if common->num_queues is not set well,and it return -ENOENT.
> > > It is better to use -EINVAL instead.
> >
> > I'm not sure I get this. It would be better to describe:
> >
> > 1) what kind of issues can we see if we return -ENOENT
> > 2) why -EINVAL can help in this case
> >
> > Thanks
> Thank you for your reply.
> We use a robot to test our dpu to get the return value of probe.
> We often get ENOENT form ' setup_vq ' function because of device error.
> Most of time, my device can't handle queue_enable well.
> This time,we get 'ENOENT' because the device set max_data_queues bigger than num_queues.
>
> I think EINVAL is used when the value of some parameter is wrong.
I think I agree. Jason?
> Btw,it not a big deal,I can modify the robot to workaround.
>
> >
> > >
> > > Signed-off-by: Angus Chen <angus.chen@jaguarmicro.com>
> > > ---
> > > drivers/virtio/virtio_pci_modern.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/virtio/virtio_pci_modern.c
> > b/drivers/virtio/virtio_pci_modern.c
> > > index c3b9f2761849..edf2e18014cd 100644
> > > --- a/drivers/virtio/virtio_pci_modern.c
> > > +++ b/drivers/virtio/virtio_pci_modern.c
> > > @@ -303,7 +303,7 @@ static struct virtqueue *setup_vq(struct
> > virtio_pci_device *vp_dev,
> > > int err;
> > >
> > > if (index >= vp_modern_get_num_queues(mdev))
> > > - return ERR_PTR(-ENOENT);
> > > + return ERR_PTR(-EINVAL);
> > >
> > > /* Check if queue is either not available or already active. */
> > > num = vp_modern_get_queue_size(mdev, index);
> > > --
> > > 2.25.1
> > >
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] virtio_pci: modify ENOENT to EINVAL
2022-11-10 5:04 ` Michael S. Tsirkin
@ 2022-11-10 5:19 ` Jason Wang
0 siblings, 0 replies; 6+ messages in thread
From: Jason Wang @ 2022-11-10 5:19 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: Angus Chen, virtualization, linux-kernel, lingshan.zhu
On Thu, Nov 10, 2022 at 1:04 PM Michael S. Tsirkin <mst@redhat.com> wrote:
>
> On Thu, Nov 10, 2022 at 03:30:59AM +0000, Angus Chen wrote:
> > Hi Jason.
> >
> > > -----Original Message-----
> > > From: Jason Wang <jasowang@redhat.com>
> > > Sent: Wednesday, November 2, 2022 1:34 PM
> > > To: Angus Chen <angus.chen@jaguarmicro.com>
> > > Cc: mst@redhat.com; virtualization@lists.linux-foundation.org;
> > > linux-kernel@vger.kernel.org; lingshan.zhu@intel.com
> > > Subject: Re: [PATCH] virtio_pci: modify ENOENT to EINVAL
> > >
> > > On Tue, Nov 1, 2022 at 7:17 PM Angus Chen <angus.chen@jaguarmicro.com>
> > > wrote:
> > > >
> > > > Virtio_crypto use max_data_queues+1 to setup vqs,
> > > > we use vp_modern_get_num_queues to protect the vq range in setup_vq.
> > > > We could enter index >= vp_modern_get_num_queues(mdev) in setup_vq
> > > > if common->num_queues is not set well,and it return -ENOENT.
> > > > It is better to use -EINVAL instead.
> > >
> > > I'm not sure I get this. It would be better to describe:
> > >
> > > 1) what kind of issues can we see if we return -ENOENT
> > > 2) why -EINVAL can help in this case
> > >
> > > Thanks
> > Thank you for your reply.
> > We use a robot to test our dpu to get the return value of probe.
> > We often get ENOENT form ' setup_vq ' function because of device error.
> > Most of time, my device can't handle queue_enable well.
> > This time,we get 'ENOENT' because the device set max_data_queues bigger than num_queues.
> >
> > I think EINVAL is used when the value of some parameter is wrong.
>
> I think I agree. Jason?
I'm fine with this then.
Thanks
>
> > Btw,it not a big deal,I can modify the robot to workaround.
> >
> > >
> > > >
> > > > Signed-off-by: Angus Chen <angus.chen@jaguarmicro.com>
> > > > ---
> > > > drivers/virtio/virtio_pci_modern.c | 2 +-
> > > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/virtio/virtio_pci_modern.c
> > > b/drivers/virtio/virtio_pci_modern.c
> > > > index c3b9f2761849..edf2e18014cd 100644
> > > > --- a/drivers/virtio/virtio_pci_modern.c
> > > > +++ b/drivers/virtio/virtio_pci_modern.c
> > > > @@ -303,7 +303,7 @@ static struct virtqueue *setup_vq(struct
> > > virtio_pci_device *vp_dev,
> > > > int err;
> > > >
> > > > if (index >= vp_modern_get_num_queues(mdev))
> > > > - return ERR_PTR(-ENOENT);
> > > > + return ERR_PTR(-EINVAL);
> > > >
> > > > /* Check if queue is either not available or already active. */
> > > > num = vp_modern_get_queue_size(mdev, index);
> > > > --
> > > > 2.25.1
> > > >
> >
>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2022-11-10 5:20 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2022-11-01 11:16 [PATCH] virtio_pci: modify ENOENT to EINVAL Angus Chen
2022-11-02 5:34 ` Jason Wang
2022-11-10 3:30 ` Angus Chen
2022-11-10 3:47 ` Jason Wang
2022-11-10 5:04 ` Michael S. Tsirkin
2022-11-10 5:19 ` Jason Wang
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