On Tue, Nov 21, 2017 at 12:44:10PM +0200, Mark Bloch wrote:
> Hi,
>
> On 21/11/2017 12:26, Leon Romanovsky wrote:
> > From: Daniel Jurgens <danielj@xxxxxxxxxxxx>
> >
> > For now the only LSM security enforcement mechanism available is
> > specific to InfiniBand. Bypass enforcement for non-IB link types.
> > This fixes a regression where modify_qp fails for iWARP because
> > querying the PKEY returns -EINVAL.
> >
> > Cc: Paul Moore <paul@xxxxxxxxxxxxxx>
> > Cc: Don Dutile <ddutile@xxxxxxxxxx>
> > Cc: stable@xxxxxxxxxxxxxxx
> > Reported-by: Potnuri Bharat Teja <bharat@xxxxxxxxxxx>
> > Fixes: d291f1a65232("IB/core: Enforce PKey security on QPs")
> > Fixes: 47a2b338fe63("IB/core: Enforce security on management datagrams")
> > Signed-off-by: Daniel Jurgens <danielj@xxxxxxxxxxxx>
> > Reviewed-by: Parav Pandit <parav@xxxxxxxxxxxx>
> > Tested-by: Potnuri Bharat Teja <bharat@xxxxxxxxxxx>
> > Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
> > ---
> > drivers/infiniband/core/security.c | 9 +++++++++
> > 1 file changed, 9 insertions(+)
> >
> > diff --git a/drivers/infiniband/core/security.c b/drivers/infiniband/core/security.c
> > index 23278ed5be45..314bf1137c7b 100644
> > --- a/drivers/infiniband/core/security.c
> > +++ b/drivers/infiniband/core/security.c
> > @@ -417,8 +417,17 @@ void ib_close_shared_qp_security(struct ib_qp_security *sec)
> >
> > int ib_create_qp_security(struct ib_qp *qp, struct ib_device *dev)
> > {
> > + u8 i = rdma_start_port(dev);
> > + bool is_ib = false;
> > int ret;
> >
> > + while (i <= rdma_end_port(dev) && !is_ib)
> > + is_ib = rdma_protocol_ib(dev, i++);
> > +
>
> What happens if we have mixed port types?
We will have is_ib set and qp_sec will be allocated on device layer and
not on port level, but because pkeys are IB specific term (at least, I
didn't find any mentioning in RoCE spec), the modify_qp won't query
for PKEYS.
> I believe mlx4 can expose two ports where each port uses a different ll protocol.
> Was that changed?
It is still true.
>
> > + /* If this isn't an IB device don't create the security context */
> > + if (!is_ib)
> > + return 0;
> > +
> > qp->qp_sec = kzalloc(sizeof(*qp->qp_sec), GFP_KERNEL);
> > if (!qp->qp_sec)
> > return -ENOMEM;
> >
>
> Mark.
> --
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