* [PATCH net] ixgbe: ensure IPsec VF<->PF compatibility
@ 2022-03-30 11:01 Leon Romanovsky
2022-03-30 16:13 ` Shannon Nelson
0 siblings, 1 reply; 3+ messages in thread
From: Leon Romanovsky @ 2022-03-30 11:01 UTC (permalink / raw)
To: David S . Miller, Jakub Kicinski
Cc: Leon Romanovsky, intel-wired-lan, Jeff Kirsher, Jesse Brandeburg,
linux-kernel, netdev, Paolo Abeni, Raed Salem, Shannon Nelson,
Tony Nguyen, Steffen Klassert
From: Leon Romanovsky <leonro@nvidia.com>
The VF driver can forward any IPsec flags and such makes the function
is not extendable and prone to backward/forward incompatibility.
If new software runs on VF, it won't know that PF configured something
completely different as it "knows" only XFRM_OFFLOAD_INBOUND flag.
Fixes: eda0333ac293 ("ixgbe: add VF IPsec management")
Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
There is no simple fix for this VF/PF incompatibility as long as FW
doesn't filter/decline unsupported options when convey mailbox from VF
to PF.
---
drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
index e596e1a9fc75..236f244e3f65 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
@@ -903,7 +903,9 @@ int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
/* Tx IPsec offload doesn't seem to work on this
* device, so block these requests for now.
*/
- if (!(sam->flags & XFRM_OFFLOAD_INBOUND)) {
+ sam->flags = sam->flags & ~XFRM_OFFLOAD_IPV6;
+ if (!(sam->flags & XFRM_OFFLOAD_INBOUND) ||
+ sam->flags & ~XFRM_OFFLOAD_INBOUND) {
err = -EOPNOTSUPP;
goto err_out;
}
--
2.35.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH net] ixgbe: ensure IPsec VF<->PF compatibility
2022-03-30 11:01 [PATCH net] ixgbe: ensure IPsec VF<->PF compatibility Leon Romanovsky
@ 2022-03-30 16:13 ` Shannon Nelson
2022-03-31 7:45 ` Leon Romanovsky
0 siblings, 1 reply; 3+ messages in thread
From: Shannon Nelson @ 2022-03-30 16:13 UTC (permalink / raw)
To: Leon Romanovsky, David S . Miller, Jakub Kicinski
Cc: Leon Romanovsky, intel-wired-lan, Jeff Kirsher, Jesse Brandeburg,
linux-kernel, netdev, Paolo Abeni, Raed Salem, Shannon Nelson,
Tony Nguyen, Steffen Klassert
On 3/30/22 4:01 AM, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@nvidia.com>
>
> The VF driver can forward any IPsec flags and such makes the function
> is not extendable and prone to backward/forward incompatibility.
>
> If new software runs on VF, it won't know that PF configured something
> completely different as it "knows" only XFRM_OFFLOAD_INBOUND flag.
>
> Fixes: eda0333ac293 ("ixgbe: add VF IPsec management")
> Reviewed-by: Raed Salem <raeds@nvidia.com>
> Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
> ---
> There is no simple fix for this VF/PF incompatibility as long as FW
> doesn't filter/decline unsupported options when convey mailbox from VF
> to PF.
> ---
> drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
> index e596e1a9fc75..236f244e3f65 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
> @@ -903,7 +903,9 @@ int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
> /* Tx IPsec offload doesn't seem to work on this
> * device, so block these requests for now.
> */
> - if (!(sam->flags & XFRM_OFFLOAD_INBOUND)) {
> + sam->flags = sam->flags & ~XFRM_OFFLOAD_IPV6;
> + if (!(sam->flags & XFRM_OFFLOAD_INBOUND) ||
> + sam->flags & ~XFRM_OFFLOAD_INBOUND) {
So after stripping the IPV6 flag, you're checking to be sure that
INBOUND is the only flag enabled, right?
Could you use
if (sam->flags != XFRM_OFFLOAD_INBOUND) {
instead?
sln
> err = -EOPNOTSUPP;
> goto err_out;
> }
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH net] ixgbe: ensure IPsec VF<->PF compatibility
2022-03-30 16:13 ` Shannon Nelson
@ 2022-03-31 7:45 ` Leon Romanovsky
0 siblings, 0 replies; 3+ messages in thread
From: Leon Romanovsky @ 2022-03-31 7:45 UTC (permalink / raw)
To: Shannon Nelson
Cc: David S . Miller, Jakub Kicinski, intel-wired-lan, Jeff Kirsher,
Jesse Brandeburg, linux-kernel, netdev, Paolo Abeni, Raed Salem,
Shannon Nelson, Tony Nguyen, Steffen Klassert
On Wed, Mar 30, 2022 at 09:13:21AM -0700, Shannon Nelson wrote:
> On 3/30/22 4:01 AM, Leon Romanovsky wrote:
> > From: Leon Romanovsky <leonro@nvidia.com>
> >
> > The VF driver can forward any IPsec flags and such makes the function
> > is not extendable and prone to backward/forward incompatibility.
> >
> > If new software runs on VF, it won't know that PF configured something
> > completely different as it "knows" only XFRM_OFFLOAD_INBOUND flag.
> >
> > Fixes: eda0333ac293 ("ixgbe: add VF IPsec management")
> > Reviewed-by: Raed Salem <raeds@nvidia.com>
> > Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
> > ---
> > There is no simple fix for this VF/PF incompatibility as long as FW
> > doesn't filter/decline unsupported options when convey mailbox from VF
> > to PF.
> > ---
> > drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c | 4 +++-
> > 1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
> > index e596e1a9fc75..236f244e3f65 100644
> > --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
> > +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
> > @@ -903,7 +903,9 @@ int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
> > /* Tx IPsec offload doesn't seem to work on this
> > * device, so block these requests for now.
> > */
> > - if (!(sam->flags & XFRM_OFFLOAD_INBOUND)) {
> > + sam->flags = sam->flags & ~XFRM_OFFLOAD_IPV6;
> > + if (!(sam->flags & XFRM_OFFLOAD_INBOUND) ||
> > + sam->flags & ~XFRM_OFFLOAD_INBOUND) {
>
> So after stripping the IPV6 flag, you're checking to be sure that INBOUND is
> the only flag enabled, right?
> Could you use
> if (sam->flags != XFRM_OFFLOAD_INBOUND) {
> instead?
Sure, I'll send new version soon.
Thanks
>
> sln
>
> > err = -EOPNOTSUPP;
> > goto err_out;
> > }
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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