Re: [PATCH net-next v1 3/3] net/mlx5e: TC, Add support for VxLAN GBP encap/decap flows offload
From: Gavin Li
Date: Tue Feb 14 2023 - 21:50:31 EST
On 2/14/2023 11:26 PM, Alexander Lobakin wrote:
External email: Use caution opening links or attachments
From: Gavin Li <gavinl@xxxxxxxxxx>
Date: Tue, 14 Feb 2023 15:41:37 +0200
Add HW offloading support for TC flows with VxLAN GBP encap/decap.
Example of encap rule:
tc filter add dev eth0 protocol ip ingress flower \
action tunnel_key set id 42 vxlan_opts 512 \
action mirred egress redirect dev vxlan1
Example of decap rule:
tc filter add dev vxlan1 protocol ip ingress flower \
enc_key_id 42 enc_dst_port 4789 vxlan_opts 1024 \
action tunnel_key unset action mirred egress redirect dev eth0
Change-Id: I48f61d02201bf3f79dcbe5d0f022f7bb27ed630f
Signed-off-by: Gavin Li <gavinl@xxxxxxxxxx>
Reviewed-by: Roi Dayan <roid@xxxxxxxxxx>
Reviewed-by: Maor Dickman <maord@xxxxxxxxxx>
Acked-by: Saeed Mahameed <saeedm@xxxxxxxxxx>
---
.../mellanox/mlx5/core/en/tc_tun_vxlan.c | 85 ++++++++++++++++++-
include/linux/mlx5/device.h | 6 ++
include/linux/mlx5/mlx5_ifc.h | 13 ++-
3 files changed, 100 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_vxlan.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_vxlan.c
index 1f62c702b625..444512ca9e0d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_vxlan.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_vxlan.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2018 Mellanox Technologies. */
+#include <net/ip_tunnels.h>
#include <net/vxlan.h>
#include "lib/vxlan.h"
#include "en/tc_tun.h"
@@ -86,9 +87,11 @@ static int mlx5e_gen_ip_tunnel_header_vxlan(char buf[],
const struct ip_tunnel_key *tun_key = &e->tun_info->key;
__be32 tun_id = tunnel_id_to_key32(tun_key->tun_id);
struct udphdr *udp = (struct udphdr *)(buf);
+ const struct vxlan_metadata *md;
struct vxlanhdr *vxh;
- if (tun_key->tun_flags & TUNNEL_VXLAN_OPT)
+ if (tun_key->tun_flags & TUNNEL_VXLAN_OPT &&
A separate pair of braces is preferred around bitops.
ACK
+ e->tun_info->options_len != sizeof(*md))
return -EOPNOTSUPP;
vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
*ip_proto = IPPROTO_UDP;
@@ -96,6 +99,70 @@ static int mlx5e_gen_ip_tunnel_header_vxlan(char buf[],
udp->dest = tun_key->tp_dst;
vxh->vx_flags = VXLAN_HF_VNI;
vxh->vx_vni = vxlan_vni_field(tun_id);
+ if (tun_key->tun_flags & TUNNEL_VXLAN_OPT) {
+ md = ip_tunnel_info_opts((struct ip_tunnel_info *)e->tun_info);
+ vxlan_build_gbp_hdr(vxh, tun_key->tun_flags,
+ (struct vxlan_metadata *)md);
Maybe constify both ip_tunnel_info_opts() and vxlan_build_gbp_hdr()
arguments instead of working around by casting away?
The reason to cast it is a WA to use ip_tunnel_info_opts which takes
non-const arg while
e->tun_info here is a const one.
+ }
+
+ return 0;
+}
+
+static int mlx5e_tc_tun_parse_vxlan_gbp_option(struct mlx5e_priv *priv,
+ struct mlx5_flow_spec *spec,
+ struct flow_cls_offload *f)
+{
+ struct flow_rule *rule = flow_cls_offload_flow_rule(f);
+ struct netlink_ext_ack *extack = f->common.extack;
+ struct flow_match_enc_opts enc_opts;
+ void *misc5_c, *misc5_v;
+ u32 *gbp, *gbp_mask;
+
+ flow_rule_match_enc_opts(rule, &enc_opts);
+
+ if (memchr_inv(&enc_opts.mask->data, 0, sizeof(enc_opts.mask->data)) &&
+ !MLX5_CAP_ESW_FT_FIELD_SUPPORT_2(priv->mdev, tunnel_header_0_1)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Matching on VxLAN GBP is not supported");
+ netdev_warn(priv->netdev,
+ "Matching on VxLAN GBP is not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (enc_opts.key->dst_opt_type != TUNNEL_VXLAN_OPT) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Wrong VxLAN option type: not GBP");
Fits into one line I believe.
ACK
+ netdev_warn(priv->netdev,
+ "Wrong VxLAN option type: not GBP\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (enc_opts.key->len != sizeof(*gbp) ||
+ enc_opts.mask->len != sizeof(*gbp_mask)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "VxLAN GBP option/mask len is not 32 bits");
+ netdev_warn(priv->netdev,
+ "VxLAN GBP option/mask len is not 32 bits\n");
+ return -EINVAL;
+ }
+
+ gbp = (u32 *)&enc_opts.key->data[0];
+ gbp_mask = (u32 *)&enc_opts.mask->data[0];
+
+ if (*gbp_mask & ~VXLAN_GBP_MASK) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Wrong VxLAN GBP mask");
You can use new NL_SET_ERR_MSG_FMT_MOD() here to print @gbp_mask to the
user, as you do it next line.
ACK
+ netdev_warn(priv->netdev,
+ "Wrong VxLAN GBP mask(0x%08X)\n", *gbp_mask);
+ return -EINVAL;
+ }
+
+ misc5_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, misc_parameters_5);
+ misc5_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, misc_parameters_5);
+ MLX5_SET(fte_match_set_misc5, misc5_c, tunnel_header_0, *gbp_mask);
+ MLX5_SET(fte_match_set_misc5, misc5_v, tunnel_header_0, *gbp);
+
+ spec->match_criteria_enable |= MLX5_MATCH_MISC_PARAMETERS_5;
return 0;
}
Thanks,
Olek