netdev - RE: [RFC net-next 1/2] if_link : add support for VF privileges

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Message-ID: <49395329523DD64492581B505F80C86D5BDCF681FD@EXMAIL.ad.emulex.com>
Date:	Tue, 21 Feb 2012 14:02:27 -0800
From:	<Ajit.Khaparde@...lex.Com>
To:	<bhutchings@...arflare.com>
CC:	<davem@...emloft.net>, <shemminger@...ux-foundation.org>,
	<netdev@...r.kernel.org>
Subject: RE: [RFC net-next 1/2] if_link : add support for VF privileges

> -----Original Message-----
> From: Ben Hutchings [mailto:bhutchings@...arflare.com]
> Sent: Tuesday, February 14, 2012 5:25 PM
> To: Khaparde, Ajit
> Cc: davem@...emloft.net; shemminger@...ux-foundation.org;
> netdev@...r.kernel.org
> Subject: Re: [RFC net-next 1/2] if_link : add support for VF privileges
> 
> On Tue, 2012-02-14 at 13:26 -0600, Ajit Khaparde wrote:
> > Signed-off-by: Ajit Khaparde <ajit.khaparde@...lex.com>
> > ---
> >  include/linux/if_link.h   |   21 +++++++++++++++++++++
> >  include/linux/netdevice.h |    3 +++
> >  net/core/rtnetlink.c      |   17 ++++++++++++++++-
> >  3 files changed, 40 insertions(+), 1 deletions(-)
> >
> > diff --git a/include/linux/if_link.h b/include/linux/if_link.h
> > index c52d4b5..9c93a8e 100644
> > --- a/include/linux/if_link.h
> > +++ b/include/linux/if_link.h
> > @@ -280,11 +280,26 @@ enum {
> >  	IFLA_VF_VLAN,
> >  	IFLA_VF_TX_RATE,	/* TX Bandwidth Allocation */
> >  	IFLA_VF_SPOOFCHK,	/* Spoof Checking on/off switch */
> > +	IFLA_VF_PRIVILEGE,	/* VF Privilege level setting */
> >  	__IFLA_VF_MAX,
> >  };
> >
> >  #define IFLA_VF_MAX (__IFLA_VF_MAX - 1)
> >
> > +enum {
> > +	IFLA_VF_PRIVILEGE_DEFAULT = 1,	/* Default privileges */
> 
> What are the default privileges?  Should existing drivers report that
> their VFs have this?
Yes. Vendors can decide what privileges they want to grant for VFs by default.

> 
> > +	IFLA_VF_PRIVILEGE_STATS	= 2,	/* Privilege to gather statistics */
> 
> I assume that means port or board statistics as opposed to statistics
> for the VF?
Yes, Port statistics.

> 
> > +	IFLA_VF_PRIVILEGE_LNK_MGMT = 4,	/* Privilege to manage link
> params */
> > +	IFLA_VF_PRIVILEGE_DIAG	= 8,	/* Privilege to perform
> diagnostics */
> > +	IFLA_VF_PRIVILEGE_MAC	= 16,	/* Privilege to modify MAC
> address */
> > +	IFLA_VF_PRIVILEGE_VLAN	= 32,	/* Privilege to add or remove
> VLANs */
> 
> I assume these two apply to RX filtering of the VF itself.  How about
> control over TX filtering?
Yes. This is for Rx filtering. Tx filtering privileges can be added if needed.

> 
> > +	IFLA_VF_PRIVILEGE_DEV_CFG = 64,	/* Unrestricted admin access
> privlege */
> 
> Does that include all the other privileges, or does it mean 'everything
> else'?
All other privileges with the exception of "secure content" (defined below).

> 
> > +	IFLA_VF_PRIVILEGE_SECURE = 128,	/* Privilege to access secure
> content */
> 
> What does that mean?
Privilege to access secure information on the ASIC like debug registers,
dump information.

> 
> > +	__IFLA_VF_PRIVILEGE_MAX,
> > +};
> > +
> > +#define IFLA_VF_PRIVILEGE_MAX (__IFLA_VF_PRIVILEGE_MAX - 1)
> [...]
> 
> This doesn't seem to make sense for an enumeration of flags.
Yes. Will take care.

Thanks
> 
> Ben.
> 
> --
> Ben Hutchings, Staff Engineer, Solarflare
> Not speaking for my employer; that's the marketing department's job.
> They asked us to note that Solarflare product names are trademarked.