On Mon, 30 Oct 2017 17:02:24 +0000, Mark Brown wrote:
> Hi all,
>
> Today's linux-next merge of the net-next tree got a conflict in:
>
> drivers/net/ethernet/netronome/nfp/flower/action.c
>
> between commit:
>
> d309ae5c6a0064 ("nfp: refuse offloading filters that redirects to upper devices")
>
> from Linus' tree and commit:
>
> 62d3f60b4d065c ("nfp: use struct fields for 8 bit-wide access")
Actually the conflict is with a much older commit b27d6a95a70d ("nfp:
compile flower vxlan tunnel set actions").
> from the net-next tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
Unfortunately, this is not a correct resolution. Please see below.
> diff --cc drivers/net/ethernet/netronome/nfp/flower/action.c
> index 8ea9320014ee,0a5fc9f8545f..000000000000
> --- a/drivers/net/ethernet/netronome/nfp/flower/action.c
> +++ b/drivers/net/ethernet/netronome/nfp/flower/action.c
> @@@ -105,19 -104,326 +104,329 @@@ nfp_fl_output(struct nfp_fl_output *out
> if (!out_dev)
> return -EOPNOTSUPP;
>
> - /* Only offload egress ports are on the same device as the ingress
> - * port.
> + tmp_flags = last ? NFP_FL_OUT_FLAGS_LAST : 0;
> +
> + if (tun_type) {
> + /* Verify the egress netdev matches the tunnel type. */
> + if (!nfp_fl_netdev_is_tunnel_type(out_dev, tun_type))
> + return -EOPNOTSUPP;
> +
> + if (*tun_out_cnt)
> + return -EOPNOTSUPP;
> + (*tun_out_cnt)++;
> +
> + output->flags = cpu_to_be16(tmp_flags |
> + NFP_FL_OUT_FLAGS_USE_TUN);
> + output->port = cpu_to_be32(NFP_FL_PORT_TYPE_TUN | tun_type);
> + } else {
> + /* Set action output parameters. */
> + output->flags = cpu_to_be16(tmp_flags);
> +
> + /* Only offload if egress ports are on the same device as the
> + * ingress port.
> + */
> + if (!switchdev_port_same_parent_id(in_dev, out_dev))
> + return -EOPNOTSUPP;
The code from net should be inserted here. Note that net-next only
indented this area, the code is unchanged.
if (!nfp_netdev_is_nfp_repr(out_dev))
return -EOPNOTSUPP;
should immediately follow switchdev_port_same_parent_id() check.
> + output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev));
> + if (!output->port)
> + return -EOPNOTSUPP;
> + }
> + nfp_flow->meta.shortcut = output->port;
> +
> + return 0;
> + }
> +
> + static bool nfp_fl_supported_tun_port(const struct tc_action *action)
> + {
> + struct ip_tunnel_info *tun = tcf_tunnel_info(action);
> +
> + return tun->key.tp_dst == htons(NFP_FL_VXLAN_PORT);
> + }
> +
> + static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len)
> + {
> + size_t act_size = sizeof(struct nfp_fl_pre_tunnel);
> + struct nfp_fl_pre_tunnel *pre_tun_act;
> +
> + /* Pre_tunnel action must be first on action list.
> + * If other actions already exist they need pushed forward.
> */
> - if (!switchdev_port_same_parent_id(in_dev, out_dev))
> + if (act_len)
> + memmove(act_data + act_size, act_data, act_len);
> +
> + pre_tun_act = (struct nfp_fl_pre_tunnel *)act_data;
> +
> + memset(pre_tun_act, 0, act_size);
> +
> + pre_tun_act->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_TUNNEL;
> + pre_tun_act->head.len_lw = act_size >> NFP_FL_LW_SIZ;
> +
> + return pre_tun_act;
> + }
> +
> + static int
> + nfp_fl_set_vxlan(struct nfp_fl_set_vxlan *set_vxlan,
> + const struct tc_action *action,
> + struct nfp_fl_pre_tunnel *pre_tun)
> + {
> + struct ip_tunnel_info *vxlan = tcf_tunnel_info(action);
> + size_t act_size = sizeof(struct nfp_fl_set_vxlan);
> + u32 tmp_set_vxlan_type_index = 0;
> + /* Currently support one pre-tunnel so index is always 0. */
> + int pretun_idx = 0;
> +
> + if (vxlan->options_len) {
> + /* Do not support options e.g. vxlan gpe. */
> return -EOPNOTSUPP;
> + }
> +
> + if (!nfp_netdev_is_nfp_repr(out_dev))
> + return -EOPNOTSUPP;
> +
> - output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev));
> - if (!output->port)
> + set_vxlan->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL;
> + set_vxlan->head.len_lw = act_size >> NFP_FL_LW_SIZ;
> +
> + /* Set tunnel type and pre-tunnel index. */
> + tmp_set_vxlan_type_index |=
> + FIELD_PREP(NFP_FL_IPV4_TUNNEL_TYPE, NFP_FL_TUNNEL_VXLAN) |
> + FIELD_PREP(NFP_FL_IPV4_PRE_TUN_INDEX, pretun_idx);
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