On Sun, Mar 3, 2019 at 8:42 PM Roi Dayan <r...@mellanox.com> wrote:
>
>
>
> On 03/03/2019 11:56, xiangxia.m....@gmail.com wrote:
> > From: Tonghao Zhang <xiangxia.m....@gmail.com>
> >
> > If we try to set VFs mac address on a VF (not PF) net device,
> > the kernel will be crash. The commands are show as below:
> >
> > $ echo 2 > /sys/class/net/$MLX_PF0/device/sriov_numvfs
> > $ ip link set $MLX_VF0 vf 0 mac 00:11:22:33:44:00
> >
> > [exception RIP: mlx5_eswitch_set_vport_mac+41]
> > [ffffb8b7079e3688] do_setlink at ffffffff8f67f85b
> > [ffffb8b7079e37a8] __rtnl_newlink at ffffffff8f683778
> > [ffffb8b7079e3b68] rtnl_newlink at ffffffff8f683a63
> > [ffffb8b7079e3b90] rtnetlink_rcv_msg at ffffffff8f67d812
> > [ffffb8b7079e3c10] netlink_rcv_skb at ffffffff8f6b88ab
> > [ffffb8b7079e3c60] netlink_unicast at ffffffff8f6b808f
> > [ffffb8b7079e3ca0] netlink_sendmsg at ffffffff8f6b8412
> > [ffffb8b7079e3d18] sock_sendmsg at ffffffff8f6452f6
> > [ffffb8b7079e3d30] ___sys_sendmsg at ffffffff8f645860
> > [ffffb8b7079e3eb0] __sys_sendmsg at ffffffff8f647a38
> > [ffffb8b7079e3f38] do_syscall_64 at ffffffff8f00401b
> > [ffffb8b7079e3f50] entry_SYSCALL_64_after_hwframe at ffffffff8f80008c
> >
> > and
> >
> > [exception RIP: mlx5_eswitch_get_vport_config+12]
> > [ffffa70607e57678] mlx5e_get_vf_config at ffffffffc03c7f8f [mlx5_core]
> > [ffffa70607e57688] do_setlink at ffffffffbc67fa59
> > [ffffa70607e577a8] __rtnl_newlink at ffffffffbc683778
> > [ffffa70607e57b68] rtnl_newlink at ffffffffbc683a63
> > [ffffa70607e57b90] rtnetlink_rcv_msg at ffffffffbc67d812
> > [ffffa70607e57c10] netlink_rcv_skb at ffffffffbc6b88ab
> > [ffffa70607e57c60] netlink_unicast at ffffffffbc6b808f
> > [ffffa70607e57ca0] netlink_sendmsg at ffffffffbc6b8412
> > [ffffa70607e57d18] sock_sendmsg at ffffffffbc6452f6
> > [ffffa70607e57d30] ___sys_sendmsg at ffffffffbc645860
> > [ffffa70607e57eb0] __sys_sendmsg at ffffffffbc647a38
> > [ffffa70607e57f38] do_syscall_64 at ffffffffbc00401b
> > [ffffa70607e57f50] entry_SYSCALL_64_after_hwframe at ffffffffbc80008c
> >
> > Fixes: a8d70a054a718 ("net/mlx5: E-Switch, Disallow vlan/spoofcheck setup
> > if not being esw manager")
> > Cc: Eli Cohen <e...@mellanox.com>
> > Signed-off-by: Tonghao Zhang <xiangxia.m....@gmail.com>
> > ---
> > drivers/net/ethernet/mellanox/mlx5/core/eswitch.c | 6 ++++++
> > 1 file changed, 6 insertions(+)
> >
> > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> > b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> > index 6cb9710..774edc9 100644
> > --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> > +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
> > @@ -1871,6 +1871,9 @@ int mlx5_eswitch_set_vport_mac(struct mlx5_eswitch
> > *esw,
> > u64 node_guid;
> > int err = 0;
> >
> > + if (!ESW_ALLOWED(esw))
> > + return -EPERM;
> > +
>
> this will introduce a bug with smart nic.
> from the commit in the fixes line, in smart nic the PF
> is not an esw manager so it will block changing vf mac
> with the pf. the fix should be checking if esw is null first.
and when i fix this bug, I review all the eswitch NDOs, i find except
mlx5e_set_vf_mac
mlx5e_get_vf_config
other NDOs use the ESW_ALLOWED to check, that include
mlx5e_set_vf_vlan
mlx5e_set_vf_spoofchk
mlx5e_set_vf_trust
mlx5e_set_vf_rate (the bug will be fixed in patch 2)
mlx5e_set_vf_link_state
mlx5e_get_vf_stats
> > if (!MLX5_CAP_GEN(esw->dev, vport_group_manager))
> > return -EPERM;
> > if (!LEGAL_VPORT(esw, vport) || is_multicast_ether_addr(mac))
> > @@ -1945,6 +1948,9 @@ int mlx5_eswitch_get_vport_config(struct mlx5_eswitch
> > *esw,
> > {
> > struct mlx5_vport *evport;
> >
> > + if (!ESW_ALLOWED(esw))
> > + return -EPERM;
> > +
> > if (!MLX5_CAP_GEN(esw->dev, vport_group_manager))
> > return -EPERM;
> > if (!LEGAL_VPORT(esw, vport))
> >
