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Message-ID: <CALgkqUojkfTwhsoAnPZdJv-oMg7PMB5m8Q2=k5=QqXKxSJgq7w@mail.gmail.com> Date: Mon, 5 Jan 2015 15:54:52 -0800 From: Greg Rose <gvrose8192@...il.com> To: Vlad Zolotarov <vladz@...udius-systems.com> Cc: netdev@...r.kernel.org, gleb@...udius-systems.com, avi@...udius-systems.com, jeffrey.t.kirsher@...el.com Subject: Re: [PATCH net-next v3 0/5]: ixgbevf: Allow querying VFs RSS indirection table and key On Mon, Jan 5, 2015 at 6:15 AM, Vlad Zolotarov <vladz@...udius-systems.com> wrote: > Add the ethtool ops to VF driver to allow querying the RSS indirection table > and RSS Random Key. > > - PF driver: Add new VF-PF channel commands. > - VF driver: Utilize these new commands and add the corresponding > ethtool callbacks. > > New in v3: > - Added a missing support for x550 devices. > - Mask the indirection table values according to PSRTYPE[n].RQPL. > - Minimized the number of added VF-PF commands. > > New in v2: > - Added a detailed description to patches 4 and 5. > > New in v1 (compared to RFC): > - Use "if-else" statement instead of a "switch-case" for a single option case. > More specifically: in cases where the newly added API version is the only one > allowed. We may consider using a "switch-case" back again when the list of > allowed API versions in these specific places grows up. > > Vlad Zolotarov (5): > ixgbe: Add a RETA query command to VF-PF channel API > ixgbevf: Add a RETA query code > ixgbe: Add GET_RSS_KEY command to VF-PF channel commands set > ixgbevf: Add RSS Key query code > ixgbevf: Add the appropriate ethtool ops to query RSS indirection > table and key > > drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h | 10 ++ > drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 91 +++++++++++++++ > drivers/net/ethernet/intel/ixgbevf/ethtool.c | 43 +++++++ > drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 4 +- > drivers/net/ethernet/intel/ixgbevf/mbx.h | 10 ++ > drivers/net/ethernet/intel/ixgbevf/vf.c | 132 ++++++++++++++++++++++ > drivers/net/ethernet/intel/ixgbevf/vf.h | 2 + > 7 files changed, 291 insertions(+), 1 deletion(-) I've given this code a review and I don't see a way to set a policy in the PF driver as to whether this request should be allowed or not. We cannot enable this query by default - it is a security risk. To make this acceptable you need to do a couple of things. A) Have the query disabled by default such that when a VF driver requests the RSS info the request is denied. B) Add hooks to allow system admins to set the policy in the PF driver as to whether the RSS info requests from the VFs are allowed or denied. Only provide the VF the privilege to request the RSS info if the system admin has explicitly set the policy to allow it. All other times the request should be denied. As it stands this is a non-starter. Privileged information cannot be made available to VFs without a way for the system admin to set policy as to whether the information should be made available or not. - Greg Rose Intel Corp Networking Division <gregory.v.rose@...el.com> > > -- > 2.1.0 > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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