[PATCH v1] net/vdev_netvsc: fix creating short name devices

[PATCH v1] net/vdev_netvsc: fix creating short name devices

[Ophir Munk]

Prior to this commit the vdev_netvsc PMD was creating tap and failsafe
devices with long names, such as "net_tap_net_vdev_netvsc0" or
"net_failsafe_net_vdev_netvsc0".
Long names containing more than 32 characters may be rejected by some
APIs (e.g. membuf pool creation).
This commits fixes this issue by creating tap and failsafe devices
with short names such as "tap_net_vsc0" or "net_failsafe_vsc0".

Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core functionality")
Cc: stable@dpdk.org

Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
---
 drivers/net/vdev_netvsc/vdev_netvsc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c b/drivers/net/vdev_netvsc/vdev_netvsc.c
index db0080a..bb2f78d 100644
--- a/drivers/net/vdev_netvsc/vdev_netvsc.c
+++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
@@ -614,13 +614,13 @@ vdev_netvsc_netvsc_probe(const struct if_nameindex *iface,
 		       name, ctx->id);
 	if (ret == -1 || (size_t)ret >= sizeof(ctx->name))
 		++i;
-	ret = snprintf(ctx->devname, sizeof(ctx->devname), "net_failsafe_%s",
-		       ctx->name);
+	ret = snprintf(ctx->devname, sizeof(ctx->devname), "net_failsafe_vsc%u",
+		       ctx->id);
 	if (ret == -1 || (size_t)ret >= sizeof(ctx->devname))
 		++i;
 	ret = snprintf(ctx->devargs, sizeof(ctx->devargs),
-		       "fd(%d),dev(net_tap_%s,remote=%s)",
-		       ctx->pipe[0], ctx->name, ctx->if_name);
+		       "fd(%d),dev(net_tap_vsc%u,remote=%s)",
+		       ctx->pipe[0], ctx->id, ctx->if_name);
 	if (ret == -1 || (size_t)ret >= sizeof(ctx->devargs))
 		++i;
 	if (i) {
-- 
2.7.4

Re: [PATCH v1] net/vdev_netvsc: fix creating short name devices

[Matan Azrad]

Hi Ophir

From: Ophir Munk, Tuesday, April 10, 2018 10:20 AM
> Prior to this commit the vdev_netvsc PMD was creating tap and failsafe
> devices with long names, such as "net_tap_net_vdev_netvsc0" or
> "net_failsafe_net_vdev_netvsc0".
> Long names containing more than 32 characters may be rejected by some
> APIs (e.g. membuf pool creation).

Since EAL allows to use long names, I don't think it is a problem of the netvsc device.
If a DPDK entity wants to use this name for some reason it needs to adjust it to the usage. 

I agree that short names are better and may help for such like cases.

I suggest the next title:
net/vdev_netvsc: use short device names

> This commits fixes this issue by creating tap and failsafe devices with short
> names such as "tap_net_vsc0" or "net_failsafe_vsc0".
> 
> Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core functionality")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
> ---
>  drivers/net/vdev_netvsc/vdev_netvsc.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c
> b/drivers/net/vdev_netvsc/vdev_netvsc.c
> index db0080a..bb2f78d 100644
> --- a/drivers/net/vdev_netvsc/vdev_netvsc.c
> +++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
> @@ -614,13 +614,13 @@ vdev_netvsc_netvsc_probe(const struct
> if_nameindex *iface,
>  		       name, ctx->id);
>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->name))
>  		++i;
> -	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> "net_failsafe_%s",
> -		       ctx->name);
> +	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> "net_failsafe_vsc%u",
> +		       ctx->id);
>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devname))
>  		++i;
>  	ret = snprintf(ctx->devargs, sizeof(ctx->devargs),
> -		       "fd(%d),dev(net_tap_%s,remote=%s)",
> -		       ctx->pipe[0], ctx->name, ctx->if_name);
> +		       "fd(%d),dev(net_tap_vsc%u,remote=%s)",
> +		       ctx->pipe[0], ctx->id, ctx->if_name);
>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devargs))
>  		++i;
>  	if (i) {
> --
> 2.7.4

Re: [PATCH v1] net/vdev_netvsc: fix creating short name devices

[Ophir Munk]

Hi. 
Discussed with Thomas.
Please consider the following commit message:

net/vdev_netvsc: shorten devices names

Prior to this commit the vdev_netvsc PMD was creating tap and failsafe
devices with long names, such as "net_tap_net_vdev_netvsc0" or
"net_failsafe_net_vdev_netvsc0".
This commits creates tap and failsafe devices with short names such as
"net_tap_netvsc0" or "net_failsafe_netvsc0".

> -----Original Message-----
> From: Matan Azrad
> Sent: Tuesday, April 10, 2018 11:04 AM
> To: Ophir Munk <ophirmu@mellanox.com>; dev@dpdk.org
> Cc: Thomas Monjalon <thomas@monjalon.net>; Olga Shern
> <olgas@mellanox.com>; stable@dpdk.org
> Subject: RE: [PATCH v1] net/vdev_netvsc: fix creating short name devices
> 
> Hi Ophir
> 
> From: Ophir Munk, Tuesday, April 10, 2018 10:20 AM
> > Prior to this commit the vdev_netvsc PMD was creating tap and failsafe
> > devices with long names, such as "net_tap_net_vdev_netvsc0" or
> > "net_failsafe_net_vdev_netvsc0".
> > Long names containing more than 32 characters may be rejected by some
> > APIs (e.g. membuf pool creation).
> 
> Since EAL allows to use long names, I don't think it is a problem of the netvsc
> device.
> If a DPDK entity wants to use this name for some reason it needs to adjust it
> to the usage.
> 
> I agree that short names are better and may help for such like cases.
> 
> I suggest the next title:
> net/vdev_netvsc: use short device names
> 
> > This commits fixes this issue by creating tap and failsafe devices
> > with short names such as "tap_net_vsc0" or "net_failsafe_vsc0".
> >
> > Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core functionality")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
> > ---
> >  drivers/net/vdev_netvsc/vdev_netvsc.c | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c
> > b/drivers/net/vdev_netvsc/vdev_netvsc.c
> > index db0080a..bb2f78d 100644
> > --- a/drivers/net/vdev_netvsc/vdev_netvsc.c
> > +++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
> > @@ -614,13 +614,13 @@ vdev_netvsc_netvsc_probe(const struct
> > if_nameindex *iface,
> >  		       name, ctx->id);
> >  	if (ret == -1 || (size_t)ret >= sizeof(ctx->name))
> >  		++i;
> > -	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> > "net_failsafe_%s",
> > -		       ctx->name);
> > +	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> > "net_failsafe_vsc%u",
> > +		       ctx->id);
> >  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devname))
> >  		++i;
> >  	ret = snprintf(ctx->devargs, sizeof(ctx->devargs),
> > -		       "fd(%d),dev(net_tap_%s,remote=%s)",
> > -		       ctx->pipe[0], ctx->name, ctx->if_name);
> > +		       "fd(%d),dev(net_tap_vsc%u,remote=%s)",
> > +		       ctx->pipe[0], ctx->id, ctx->if_name);
> >  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devargs))
> >  		++i;
> >  	if (i) {
> > --
> > 2.7.4

Re: [PATCH v1] net/vdev_netvsc: fix creating short name devices

[Matan Azrad]

It is OK for me.
Thanks.

From: Ophir Munk, Tuesday, April 10, 2018 6:36 PM
> Hi.
> Discussed with Thomas.
> Please consider the following commit message:
> 
> net/vdev_netvsc: shorten devices names
> 
> Prior to this commit the vdev_netvsc PMD was creating tap and failsafe
> devices with long names, such as "net_tap_net_vdev_netvsc0" or
> "net_failsafe_net_vdev_netvsc0".
> This commits creates tap and failsafe devices with short names such as
> "net_tap_netvsc0" or "net_failsafe_netvsc0".
> 
> > -----Original Message-----
> > From: Matan Azrad
> > Sent: Tuesday, April 10, 2018 11:04 AM
> > To: Ophir Munk <ophirmu@mellanox.com>; dev@dpdk.org
> > Cc: Thomas Monjalon <thomas@monjalon.net>; Olga Shern
> > <olgas@mellanox.com>; stable@dpdk.org
> > Subject: RE: [PATCH v1] net/vdev_netvsc: fix creating short name
> > devices
> >
> > Hi Ophir
> >
> > From: Ophir Munk, Tuesday, April 10, 2018 10:20 AM
> > > Prior to this commit the vdev_netvsc PMD was creating tap and
> > > failsafe devices with long names, such as "net_tap_net_vdev_netvsc0"
> > > or "net_failsafe_net_vdev_netvsc0".
> > > Long names containing more than 32 characters may be rejected by
> > > some APIs (e.g. membuf pool creation).
> >
> > Since EAL allows to use long names, I don't think it is a problem of
> > the netvsc device.
> > If a DPDK entity wants to use this name for some reason it needs to
> > adjust it to the usage.
> >
> > I agree that short names are better and may help for such like cases.
> >
> > I suggest the next title:
> > net/vdev_netvsc: use short device names
> >
> > > This commits fixes this issue by creating tap and failsafe devices
> > > with short names such as "tap_net_vsc0" or "net_failsafe_vsc0".
> > >
> > > Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core
> > > functionality")
> > > Cc: stable@dpdk.org
> > >
> > > Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
> > > ---
> > >  drivers/net/vdev_netvsc/vdev_netvsc.c | 8 ++++----
> > >  1 file changed, 4 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c
> > > b/drivers/net/vdev_netvsc/vdev_netvsc.c
> > > index db0080a..bb2f78d 100644
> > > --- a/drivers/net/vdev_netvsc/vdev_netvsc.c
> > > +++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
> > > @@ -614,13 +614,13 @@ vdev_netvsc_netvsc_probe(const struct
> > > if_nameindex *iface,
> > >  		       name, ctx->id);
> > >  	if (ret == -1 || (size_t)ret >= sizeof(ctx->name))
> > >  		++i;
> > > -	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> > > "net_failsafe_%s",
> > > -		       ctx->name);
> > > +	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> > > "net_failsafe_vsc%u",
> > > +		       ctx->id);
> > >  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devname))
> > >  		++i;
> > >  	ret = snprintf(ctx->devargs, sizeof(ctx->devargs),
> > > -		       "fd(%d),dev(net_tap_%s,remote=%s)",
> > > -		       ctx->pipe[0], ctx->name, ctx->if_name);
> > > +		       "fd(%d),dev(net_tap_vsc%u,remote=%s)",
> > > +		       ctx->pipe[0], ctx->id, ctx->if_name);
> > >  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devargs))
> > >  		++i;
> > >  	if (i) {
> > > --
> > > 2.7.4

Re: [PATCH v1] net/vdev_netvsc: fix creating short name devices

[Ferruh Yigit]

On 4/10/2018 8:20 AM, Ophir Munk wrote:
> Prior to this commit the vdev_netvsc PMD was creating tap and failsafe
> devices with long names, such as "net_tap_net_vdev_netvsc0" or
> "net_failsafe_net_vdev_netvsc0".
> Long names containing more than 32 characters may be rejected by some
> APIs (e.g. membuf pool creation).
> This commits fixes this issue by creating tap and failsafe devices
> with short names such as "tap_net_vsc0" or "net_failsafe_vsc0".
> 
> Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core functionality")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Ophir Munk <ophirmu@mellanox.com>

Applied to dpdk-next-net/master, thanks.

(used suggested commit title/log [1])

[1]
net/vdev_netvsc: shorten devices names

Prior to this commit the vdev_netvsc PMD was creating tap and failsafe
devices with long names, such as "net_tap_net_vdev_netvsc0" or
"net_failsafe_net_vdev_netvsc0".
This commits creates tap and failsafe devices with short names such as
"net_tap_netvsc0" or "net_failsafe_netvsc0".

Re: [dpdk-stable] [PATCH v1] net/vdev_netvsc: fix creating short name devices

[Ferruh Yigit]

On 4/10/2018 4:39 PM, Matan Azrad wrote:
> It is OK for me.

Converting this to explicit ack:
Acked-by: Matan Azrad <matan@mellanox.com>

> Thanks.
> 
> From: Ophir Munk, Tuesday, April 10, 2018 6:36 PM
>> Hi.
>> Discussed with Thomas.
>> Please consider the following commit message:
>>
>> net/vdev_netvsc: shorten devices names
>>
>> Prior to this commit the vdev_netvsc PMD was creating tap and failsafe
>> devices with long names, such as "net_tap_net_vdev_netvsc0" or
>> "net_failsafe_net_vdev_netvsc0".
>> This commits creates tap and failsafe devices with short names such as
>> "net_tap_netvsc0" or "net_failsafe_netvsc0".
>>
>>> -----Original Message-----
>>> From: Matan Azrad
>>> Sent: Tuesday, April 10, 2018 11:04 AM
>>> To: Ophir Munk <ophirmu@mellanox.com>; dev@dpdk.org
>>> Cc: Thomas Monjalon <thomas@monjalon.net>; Olga Shern
>>> <olgas@mellanox.com>; stable@dpdk.org
>>> Subject: RE: [PATCH v1] net/vdev_netvsc: fix creating short name
>>> devices
>>>
>>> Hi Ophir
>>>
>>> From: Ophir Munk, Tuesday, April 10, 2018 10:20 AM
>>>> Prior to this commit the vdev_netvsc PMD was creating tap and
>>>> failsafe devices with long names, such as "net_tap_net_vdev_netvsc0"
>>>> or "net_failsafe_net_vdev_netvsc0".
>>>> Long names containing more than 32 characters may be rejected by
>>>> some APIs (e.g. membuf pool creation).
>>>
>>> Since EAL allows to use long names, I don't think it is a problem of
>>> the netvsc device.
>>> If a DPDK entity wants to use this name for some reason it needs to
>>> adjust it to the usage.
>>>
>>> I agree that short names are better and may help for such like cases.
>>>
>>> I suggest the next title:
>>> net/vdev_netvsc: use short device names
>>>
>>>> This commits fixes this issue by creating tap and failsafe devices
>>>> with short names such as "tap_net_vsc0" or "net_failsafe_vsc0".
>>>>
>>>> Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core
>>>> functionality")
>>>> Cc: stable@dpdk.org
>>>>
>>>> Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
>>>> ---
>>>>  drivers/net/vdev_netvsc/vdev_netvsc.c | 8 ++++----
>>>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>>>
>>>> diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>> b/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>> index db0080a..bb2f78d 100644
>>>> --- a/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>> +++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>> @@ -614,13 +614,13 @@ vdev_netvsc_netvsc_probe(const struct
>>>> if_nameindex *iface,
>>>>  		       name, ctx->id);
>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->name))
>>>>  		++i;
>>>> -	ret = snprintf(ctx->devname, sizeof(ctx->devname),
>>>> "net_failsafe_%s",
>>>> -		       ctx->name);
>>>> +	ret = snprintf(ctx->devname, sizeof(ctx->devname),
>>>> "net_failsafe_vsc%u",
>>>> +		       ctx->id);
>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devname))
>>>>  		++i;
>>>>  	ret = snprintf(ctx->devargs, sizeof(ctx->devargs),
>>>> -		       "fd(%d),dev(net_tap_%s,remote=%s)",
>>>> -		       ctx->pipe[0], ctx->name, ctx->if_name);
>>>> +		       "fd(%d),dev(net_tap_vsc%u,remote=%s)",
>>>> +		       ctx->pipe[0], ctx->id, ctx->if_name);
>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devargs))
>>>>  		++i;
>>>>  	if (i) {
>>>> --
>>>> 2.7.4
> 

Re: [dpdk-stable] [PATCH v1] net/vdev_netvsc: fix creating short name devices

[Matan Azrad]

From: Ferruh Yigit, Tuesday, April 24, 2018 5:20 PM
> On 4/10/2018 4:39 PM, Matan Azrad wrote:
> > It is OK for me.
> 
> Converting this to explicit ack:
> Acked-by: Matan Azrad <matan@mellanox.com>
> 

Ok, don't forget to remove the fixes line.

> > Thanks.
> >
> > From: Ophir Munk, Tuesday, April 10, 2018 6:36 PM
> >> Hi.
> >> Discussed with Thomas.
> >> Please consider the following commit message:
> >>
> >> net/vdev_netvsc: shorten devices names
> >>
> >> Prior to this commit the vdev_netvsc PMD was creating tap and
> >> failsafe devices with long names, such as "net_tap_net_vdev_netvsc0"
> >> or "net_failsafe_net_vdev_netvsc0".
> >> This commits creates tap and failsafe devices with short names such
> >> as "net_tap_netvsc0" or "net_failsafe_netvsc0".
> >>
> >>> -----Original Message-----
> >>> From: Matan Azrad
> >>> Sent: Tuesday, April 10, 2018 11:04 AM
> >>> To: Ophir Munk <ophirmu@mellanox.com>; dev@dpdk.org
> >>> Cc: Thomas Monjalon <thomas@monjalon.net>; Olga Shern
> >>> <olgas@mellanox.com>; stable@dpdk.org
> >>> Subject: RE: [PATCH v1] net/vdev_netvsc: fix creating short name
> >>> devices
> >>>
> >>> Hi Ophir
> >>>
> >>> From: Ophir Munk, Tuesday, April 10, 2018 10:20 AM
> >>>> Prior to this commit the vdev_netvsc PMD was creating tap and
> >>>> failsafe devices with long names, such as "net_tap_net_vdev_netvsc0"
> >>>> or "net_failsafe_net_vdev_netvsc0".
> >>>> Long names containing more than 32 characters may be rejected by
> >>>> some APIs (e.g. membuf pool creation).
> >>>
> >>> Since EAL allows to use long names, I don't think it is a problem of
> >>> the netvsc device.
> >>> If a DPDK entity wants to use this name for some reason it needs to
> >>> adjust it to the usage.
> >>>
> >>> I agree that short names are better and may help for such like cases.
> >>>
> >>> I suggest the next title:
> >>> net/vdev_netvsc: use short device names
> >>>
> >>>> This commits fixes this issue by creating tap and failsafe devices
> >>>> with short names such as "tap_net_vsc0" or "net_failsafe_vsc0".
> >>>>
> >>>> Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core
> >>>> functionality")
> >>>> Cc: stable@dpdk.org
> >>>>
> >>>> Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
> >>>> ---
> >>>>  drivers/net/vdev_netvsc/vdev_netvsc.c | 8 ++++----
> >>>>  1 file changed, 4 insertions(+), 4 deletions(-)
> >>>>
> >>>> diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c
> >>>> b/drivers/net/vdev_netvsc/vdev_netvsc.c
> >>>> index db0080a..bb2f78d 100644
> >>>> --- a/drivers/net/vdev_netvsc/vdev_netvsc.c
> >>>> +++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
> >>>> @@ -614,13 +614,13 @@ vdev_netvsc_netvsc_probe(const struct
> >>>> if_nameindex *iface,
> >>>>  		       name, ctx->id);
> >>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->name))
> >>>>  		++i;
> >>>> -	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> >>>> "net_failsafe_%s",
> >>>> -		       ctx->name);
> >>>> +	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> >>>> "net_failsafe_vsc%u",
> >>>> +		       ctx->id);
> >>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devname))
> >>>>  		++i;
> >>>>  	ret = snprintf(ctx->devargs, sizeof(ctx->devargs),
> >>>> -		       "fd(%d),dev(net_tap_%s,remote=%s)",
> >>>> -		       ctx->pipe[0], ctx->name, ctx->if_name);
> >>>> +		       "fd(%d),dev(net_tap_vsc%u,remote=%s)",
> >>>> +		       ctx->pipe[0], ctx->id, ctx->if_name);
> >>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devargs))
> >>>>  		++i;
> >>>>  	if (i) {
> >>>> --
> >>>> 2.7.4
> >

Re: [dpdk-stable] [PATCH v1] net/vdev_netvsc: fix creating short name devices

[Ferruh Yigit]

On 4/25/2018 11:25 AM, Matan Azrad wrote:
> 
> 
> From: Ferruh Yigit, Tuesday, April 24, 2018 5:20 PM
>> On 4/10/2018 4:39 PM, Matan Azrad wrote:
>>> It is OK for me.
>>
>> Converting this to explicit ack:
>> Acked-by: Matan Azrad <matan@mellanox.com>
>>
> 
> Ok, don't forget to remove the fixes line.

Don't forget? Should fixes line be removed, why?

> 
>>> Thanks.
>>>
>>> From: Ophir Munk, Tuesday, April 10, 2018 6:36 PM
>>>> Hi.
>>>> Discussed with Thomas.
>>>> Please consider the following commit message:
>>>>
>>>> net/vdev_netvsc: shorten devices names
>>>>
>>>> Prior to this commit the vdev_netvsc PMD was creating tap and
>>>> failsafe devices with long names, such as "net_tap_net_vdev_netvsc0"
>>>> or "net_failsafe_net_vdev_netvsc0".
>>>> This commits creates tap and failsafe devices with short names such
>>>> as "net_tap_netvsc0" or "net_failsafe_netvsc0".
>>>>
>>>>> -----Original Message-----
>>>>> From: Matan Azrad
>>>>> Sent: Tuesday, April 10, 2018 11:04 AM
>>>>> To: Ophir Munk <ophirmu@mellanox.com>; dev@dpdk.org
>>>>> Cc: Thomas Monjalon <thomas@monjalon.net>; Olga Shern
>>>>> <olgas@mellanox.com>; stable@dpdk.org
>>>>> Subject: RE: [PATCH v1] net/vdev_netvsc: fix creating short name
>>>>> devices
>>>>>
>>>>> Hi Ophir
>>>>>
>>>>> From: Ophir Munk, Tuesday, April 10, 2018 10:20 AM
>>>>>> Prior to this commit the vdev_netvsc PMD was creating tap and
>>>>>> failsafe devices with long names, such as "net_tap_net_vdev_netvsc0"
>>>>>> or "net_failsafe_net_vdev_netvsc0".
>>>>>> Long names containing more than 32 characters may be rejected by
>>>>>> some APIs (e.g. membuf pool creation).
>>>>>
>>>>> Since EAL allows to use long names, I don't think it is a problem of
>>>>> the netvsc device.
>>>>> If a DPDK entity wants to use this name for some reason it needs to
>>>>> adjust it to the usage.
>>>>>
>>>>> I agree that short names are better and may help for such like cases.
>>>>>
>>>>> I suggest the next title:
>>>>> net/vdev_netvsc: use short device names
>>>>>
>>>>>> This commits fixes this issue by creating tap and failsafe devices
>>>>>> with short names such as "tap_net_vsc0" or "net_failsafe_vsc0".
>>>>>>
>>>>>> Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core
>>>>>> functionality")
>>>>>> Cc: stable@dpdk.org
>>>>>>
>>>>>> Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
>>>>>> ---
>>>>>>  drivers/net/vdev_netvsc/vdev_netvsc.c | 8 ++++----
>>>>>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>>>>>
>>>>>> diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>>>> b/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>>>> index db0080a..bb2f78d 100644
>>>>>> --- a/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>>>> +++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>>>> @@ -614,13 +614,13 @@ vdev_netvsc_netvsc_probe(const struct
>>>>>> if_nameindex *iface,
>>>>>>  		       name, ctx->id);
>>>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->name))
>>>>>>  		++i;
>>>>>> -	ret = snprintf(ctx->devname, sizeof(ctx->devname),
>>>>>> "net_failsafe_%s",
>>>>>> -		       ctx->name);
>>>>>> +	ret = snprintf(ctx->devname, sizeof(ctx->devname),
>>>>>> "net_failsafe_vsc%u",
>>>>>> +		       ctx->id);
>>>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devname))
>>>>>>  		++i;
>>>>>>  	ret = snprintf(ctx->devargs, sizeof(ctx->devargs),
>>>>>> -		       "fd(%d),dev(net_tap_%s,remote=%s)",
>>>>>> -		       ctx->pipe[0], ctx->name, ctx->if_name);
>>>>>> +		       "fd(%d),dev(net_tap_vsc%u,remote=%s)",
>>>>>> +		       ctx->pipe[0], ctx->id, ctx->if_name);
>>>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devargs))
>>>>>>  		++i;
>>>>>>  	if (i) {
>>>>>> --
>>>>>> 2.7.4
>>>
> 

Re: [dpdk-stable] [PATCH v1] net/vdev_netvsc: fix creating short name devices

[Matan Azrad]

From: Ferruh Yigit, Wednesday, April 25, 2018 1:29 PM
> On 4/25/2018 11:25 AM, Matan Azrad wrote:
> >
> >
> > From: Ferruh Yigit, Tuesday, April 24, 2018 5:20 PM
> >> On 4/10/2018 4:39 PM, Matan Azrad wrote:
> >>> It is OK for me.
> >>
> >> Converting this to explicit ack:
> >> Acked-by: Matan Azrad <matan@mellanox.com>
> >>
> >
> > Ok, don't forget to remove the fixes line.
> 
> Don't forget? Should fixes line be removed, why?

This is not a fix.

> >>> Thanks.
> >>>
> >>> From: Ophir Munk, Tuesday, April 10, 2018 6:36 PM
> >>>> Hi.
> >>>> Discussed with Thomas.
> >>>> Please consider the following commit message:
> >>>>
> >>>> net/vdev_netvsc: shorten devices names
> >>>>
> >>>> Prior to this commit the vdev_netvsc PMD was creating tap and
> >>>> failsafe devices with long names, such as "net_tap_net_vdev_netvsc0"
> >>>> or "net_failsafe_net_vdev_netvsc0".
> >>>> This commits creates tap and failsafe devices with short names such
> >>>> as "net_tap_netvsc0" or "net_failsafe_netvsc0".
> >>>>
> >>>>> -----Original Message-----
> >>>>> From: Matan Azrad
> >>>>> Sent: Tuesday, April 10, 2018 11:04 AM
> >>>>> To: Ophir Munk <ophirmu@mellanox.com>; dev@dpdk.org
> >>>>> Cc: Thomas Monjalon <thomas@monjalon.net>; Olga Shern
> >>>>> <olgas@mellanox.com>; stable@dpdk.org
> >>>>> Subject: RE: [PATCH v1] net/vdev_netvsc: fix creating short name
> >>>>> devices
> >>>>>
> >>>>> Hi Ophir
> >>>>>
> >>>>> From: Ophir Munk, Tuesday, April 10, 2018 10:20 AM
> >>>>>> Prior to this commit the vdev_netvsc PMD was creating tap and
> >>>>>> failsafe devices with long names, such as
> "net_tap_net_vdev_netvsc0"
> >>>>>> or "net_failsafe_net_vdev_netvsc0".
> >>>>>> Long names containing more than 32 characters may be rejected by
> >>>>>> some APIs (e.g. membuf pool creation).
> >>>>>
> >>>>> Since EAL allows to use long names, I don't think it is a problem
> >>>>> of the netvsc device.
> >>>>> If a DPDK entity wants to use this name for some reason it needs
> >>>>> to adjust it to the usage.
> >>>>>
> >>>>> I agree that short names are better and may help for such like cases.
> >>>>>
> >>>>> I suggest the next title:
> >>>>> net/vdev_netvsc: use short device names
> >>>>>
> >>>>>> This commits fixes this issue by creating tap and failsafe
> >>>>>> devices with short names such as "tap_net_vsc0" or
> "net_failsafe_vsc0".
> >>>>>>
> >>>>>> Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core
> >>>>>> functionality")
> >>>>>> Cc: stable@dpdk.org
> >>>>>>
> >>>>>> Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
> >>>>>> ---
> >>>>>>  drivers/net/vdev_netvsc/vdev_netvsc.c | 8 ++++----
> >>>>>>  1 file changed, 4 insertions(+), 4 deletions(-)
> >>>>>>
> >>>>>> diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c
> >>>>>> b/drivers/net/vdev_netvsc/vdev_netvsc.c
> >>>>>> index db0080a..bb2f78d 100644
> >>>>>> --- a/drivers/net/vdev_netvsc/vdev_netvsc.c
> >>>>>> +++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
> >>>>>> @@ -614,13 +614,13 @@ vdev_netvsc_netvsc_probe(const struct
> >>>>>> if_nameindex *iface,
> >>>>>>  		       name, ctx->id);
> >>>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->name))
> >>>>>>  		++i;
> >>>>>> -	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> >>>>>> "net_failsafe_%s",
> >>>>>> -		       ctx->name);
> >>>>>> +	ret = snprintf(ctx->devname, sizeof(ctx->devname),
> >>>>>> "net_failsafe_vsc%u",
> >>>>>> +		       ctx->id);
> >>>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devname))
> >>>>>>  		++i;
> >>>>>>  	ret = snprintf(ctx->devargs, sizeof(ctx->devargs),
> >>>>>> -		       "fd(%d),dev(net_tap_%s,remote=%s)",
> >>>>>> -		       ctx->pipe[0], ctx->name, ctx->if_name);
> >>>>>> +		       "fd(%d),dev(net_tap_vsc%u,remote=%s)",
> >>>>>> +		       ctx->pipe[0], ctx->id, ctx->if_name);
> >>>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devargs))
> >>>>>>  		++i;
> >>>>>>  	if (i) {
> >>>>>> --
> >>>>>> 2.7.4
> >>>
> >

Re: [dpdk-stable] [PATCH v1] net/vdev_netvsc: fix creating short name devices

[Ferruh Yigit]

On 4/25/2018 11:33 AM, Matan Azrad wrote:
> 
> 
> From: Ferruh Yigit, Wednesday, April 25, 2018 1:29 PM
>> On 4/25/2018 11:25 AM, Matan Azrad wrote:
>>>
>>>
>>> From: Ferruh Yigit, Tuesday, April 24, 2018 5:20 PM
>>>> On 4/10/2018 4:39 PM, Matan Azrad wrote:
>>>>> It is OK for me.
>>>>
>>>> Converting this to explicit ack:
>>>> Acked-by: Matan Azrad <matan@mellanox.com>
>>>>
>>>
>>> Ok, don't forget to remove the fixes line.
>>
>> Don't forget? Should fixes line be removed, why?
> 
> This is not a fix.

Right, will update it in next-net.

> 
>>>>> Thanks.
>>>>>
>>>>> From: Ophir Munk, Tuesday, April 10, 2018 6:36 PM
>>>>>> Hi.
>>>>>> Discussed with Thomas.
>>>>>> Please consider the following commit message:
>>>>>>
>>>>>> net/vdev_netvsc: shorten devices names
>>>>>>
>>>>>> Prior to this commit the vdev_netvsc PMD was creating tap and
>>>>>> failsafe devices with long names, such as "net_tap_net_vdev_netvsc0"
>>>>>> or "net_failsafe_net_vdev_netvsc0".
>>>>>> This commits creates tap and failsafe devices with short names such
>>>>>> as "net_tap_netvsc0" or "net_failsafe_netvsc0".
>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: Matan Azrad
>>>>>>> Sent: Tuesday, April 10, 2018 11:04 AM
>>>>>>> To: Ophir Munk <ophirmu@mellanox.com>; dev@dpdk.org
>>>>>>> Cc: Thomas Monjalon <thomas@monjalon.net>; Olga Shern
>>>>>>> <olgas@mellanox.com>; stable@dpdk.org
>>>>>>> Subject: RE: [PATCH v1] net/vdev_netvsc: fix creating short name
>>>>>>> devices
>>>>>>>
>>>>>>> Hi Ophir
>>>>>>>
>>>>>>> From: Ophir Munk, Tuesday, April 10, 2018 10:20 AM
>>>>>>>> Prior to this commit the vdev_netvsc PMD was creating tap and
>>>>>>>> failsafe devices with long names, such as
>> "net_tap_net_vdev_netvsc0"
>>>>>>>> or "net_failsafe_net_vdev_netvsc0".
>>>>>>>> Long names containing more than 32 characters may be rejected by
>>>>>>>> some APIs (e.g. membuf pool creation).
>>>>>>>
>>>>>>> Since EAL allows to use long names, I don't think it is a problem
>>>>>>> of the netvsc device.
>>>>>>> If a DPDK entity wants to use this name for some reason it needs
>>>>>>> to adjust it to the usage.
>>>>>>>
>>>>>>> I agree that short names are better and may help for such like cases.
>>>>>>>
>>>>>>> I suggest the next title:
>>>>>>> net/vdev_netvsc: use short device names
>>>>>>>
>>>>>>>> This commits fixes this issue by creating tap and failsafe
>>>>>>>> devices with short names such as "tap_net_vsc0" or
>> "net_failsafe_vsc0".
>>>>>>>>
>>>>>>>> Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core
>>>>>>>> functionality")
>>>>>>>> Cc: stable@dpdk.org
>>>>>>>>
>>>>>>>> Signed-off-by: Ophir Munk <ophirmu@mellanox.com>
>>>>>>>> ---
>>>>>>>>  drivers/net/vdev_netvsc/vdev_netvsc.c | 8 ++++----
>>>>>>>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>>>>>>>
>>>>>>>> diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>>>>>> b/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>>>>>> index db0080a..bb2f78d 100644
>>>>>>>> --- a/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>>>>>> +++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
>>>>>>>> @@ -614,13 +614,13 @@ vdev_netvsc_netvsc_probe(const struct
>>>>>>>> if_nameindex *iface,
>>>>>>>>  		       name, ctx->id);
>>>>>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->name))
>>>>>>>>  		++i;
>>>>>>>> -	ret = snprintf(ctx->devname, sizeof(ctx->devname),
>>>>>>>> "net_failsafe_%s",
>>>>>>>> -		       ctx->name);
>>>>>>>> +	ret = snprintf(ctx->devname, sizeof(ctx->devname),
>>>>>>>> "net_failsafe_vsc%u",
>>>>>>>> +		       ctx->id);
>>>>>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devname))
>>>>>>>>  		++i;
>>>>>>>>  	ret = snprintf(ctx->devargs, sizeof(ctx->devargs),
>>>>>>>> -		       "fd(%d),dev(net_tap_%s,remote=%s)",
>>>>>>>> -		       ctx->pipe[0], ctx->name, ctx->if_name);
>>>>>>>> +		       "fd(%d),dev(net_tap_vsc%u,remote=%s)",
>>>>>>>> +		       ctx->pipe[0], ctx->id, ctx->if_name);
>>>>>>>>  	if (ret == -1 || (size_t)ret >= sizeof(ctx->devargs))
>>>>>>>>  		++i;
>>>>>>>>  	if (i) {
>>>>>>>> --
>>>>>>>> 2.7.4
>>>>>
>>>
>