[PATCH net-next v6 0/5] net/mlx5e: Add GBP VxLAN HW offload support

[PATCH net-next v6 0/5] net/mlx5e: Add GBP VxLAN HW offload support

[Gavin Li]

Patch-1: Remove unused argument from functions.
Patch-2: Expose helper function vxlan_build_gbp_hdr.
Patch-3: Add helper function for encap_info_equal for tunnels with options.
Patch-4: Preserving the const-ness of the pointer in ip_tunnel_info_opts.
Patch-5: Add HW offloading support for TC flows with VxLAN GBP encap/decap
        in mlx ethernet driver.

Gavin Li (5):
  vxlan: Remove unused argument from vxlan_build_gbp_hdr( ) and
    vxlan_build_gpe_hdr( )
---
changelog:
v2->v3
- Addressed comments from Paolo Abeni
- Add new patch
---
  vxlan: Expose helper vxlan_build_gbp_hdr
---
changelog:
v1->v2
- Addressed comments from Alexander Lobakin
- Use const to annotate read-only the pointer parameter
---
  net/mlx5e: Add helper for encap_info_equal for tunnels with options
---
changelog:
v3->v4
- Addressed comments from Alexander Lobakin
- Fix vertical alignment issue
v1->v2
- Addressed comments from Alexander Lobakin
- Replace confusing pointer arithmetic with function call
- Use boolean operator NOT to check if the function return value is not zero
---
  ip_tunnel: Preserve pointer const in ip_tunnel_info_opts
---
changelog:
v5->v6
- Addressed comments from Alexander Lobakin and Simon Horman
- Add new patch
- Change ip_tunnel_info_opts to macro and preserve pointer const
---
  net/mlx5e: TC, Add support for VxLAN GBP encap/decap flows offload
---
changelog:
v5->v6
- Addressed comments from Alexander Lobakin and Simon Horman
- Don't use cast in driver code
v4->v5
- Addressed comments from Simon Horman
- Remove Simon Horman from Reviewed-by list
v3->v4
- Addressed comments from Simon Horman
- Using cast in place instead of changing API
v2->v3
- Addressed comments from Alexander Lobakin
- Remove the WA by casting away
v1->v2
- Addressed comments from Alexander Lobakin
- Add a separate pair of braces around bitops
- Remove the WA by casting away
- Fit all log messages into one line
- Use NL_SET_ERR_MSG_FMT_MOD to print the invalid value on error
---

 .../ethernet/mellanox/mlx5/core/en/tc_tun.h   |  3 +
 .../mellanox/mlx5/core/en/tc_tun_encap.c      | 32 ++++++++
 .../mellanox/mlx5/core/en/tc_tun_geneve.c     | 24 +-----
 .../mellanox/mlx5/core/en/tc_tun_vxlan.c      | 76 ++++++++++++++++++-
 drivers/net/vxlan/vxlan_core.c                | 27 +------
 include/linux/mlx5/device.h                   |  6 ++
 include/linux/mlx5/mlx5_ifc.h                 | 13 +++-
 include/net/ip_tunnels.h                      | 11 +--
 include/net/vxlan.h                           | 19 +++++
 9 files changed, 155 insertions(+), 56 deletions(-)

-- 
2.31.1

[PATCH net-next v6 1/5] vxlan: Remove unused argument from vxlan_build_gbp_hdr( ) and vxlan_build_gpe_hdr( )

[Gavin Li]

Remove unused argument (i.e. u32 vxflags) in vxlan_build_gbp_hdr( ) and
vxlan_build_gpe_hdr( ) function arguments.

Signed-off-by: Gavin Li <gavinl@nvidia.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
---
 drivers/net/vxlan/vxlan_core.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index b1b179effe2a..86967277ab97 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -2140,8 +2140,7 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
 	return false;
 }
 
-static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
-				struct vxlan_metadata *md)
+static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, struct vxlan_metadata *md)
 {
 	struct vxlanhdr_gbp *gbp;
 
@@ -2160,8 +2159,7 @@ static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
 	gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
 }
 
-static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags,
-			       __be16 protocol)
+static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, __be16 protocol)
 {
 	struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh;
 
@@ -2224,9 +2222,9 @@ static int vxlan_build_skb(struct sk_buff *skb, struct dst_entry *dst,
 	}
 
 	if (vxflags & VXLAN_F_GBP)
-		vxlan_build_gbp_hdr(vxh, vxflags, md);
+		vxlan_build_gbp_hdr(vxh, md);
 	if (vxflags & VXLAN_F_GPE) {
-		err = vxlan_build_gpe_hdr(vxh, vxflags, skb->protocol);
+		err = vxlan_build_gpe_hdr(vxh, skb->protocol);
 		if (err < 0)
 			return err;
 		inner_protocol = skb->protocol;
-- 
2.31.1

[PATCH net-next v6 2/5] vxlan: Expose helper vxlan_build_gbp_hdr

[Gavin Li]

The function vxlan_build_gbp_hdr will be used by other modules to build
gbp option in vxlan header according to gbp flags.

Signed-off-by: Gavin Li <gavinl@nvidia.com>
Reviewed-by: Gavi Teitz <gavi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Acked-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
---
 drivers/net/vxlan/vxlan_core.c | 19 -------------------
 include/net/vxlan.h            | 19 +++++++++++++++++++
 2 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 86967277ab97..13faab36b3e1 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -2140,25 +2140,6 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
 	return false;
 }
 
-static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, struct vxlan_metadata *md)
-{
-	struct vxlanhdr_gbp *gbp;
-
-	if (!md->gbp)
-		return;
-
-	gbp = (struct vxlanhdr_gbp *)vxh;
-	vxh->vx_flags |= VXLAN_HF_GBP;
-
-	if (md->gbp & VXLAN_GBP_DONT_LEARN)
-		gbp->dont_learn = 1;
-
-	if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
-		gbp->policy_applied = 1;
-
-	gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
-}
-
 static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, __be16 protocol)
 {
 	struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)vxh;
diff --git a/include/net/vxlan.h b/include/net/vxlan.h
index bca5b01af247..b6d419fa7ab1 100644
--- a/include/net/vxlan.h
+++ b/include/net/vxlan.h
@@ -566,4 +566,23 @@ static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh,
 	return true;
 }
 
+static inline void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, const struct vxlan_metadata *md)
+{
+	struct vxlanhdr_gbp *gbp;
+
+	if (!md->gbp)
+		return;
+
+	gbp = (struct vxlanhdr_gbp *)vxh;
+	vxh->vx_flags |= VXLAN_HF_GBP;
+
+	if (md->gbp & VXLAN_GBP_DONT_LEARN)
+		gbp->dont_learn = 1;
+
+	if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
+		gbp->policy_applied = 1;
+
+	gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
+}
+
 #endif
-- 
2.31.1

[PATCH net-next v6 3/5] net/mlx5e: Add helper for encap_info_equal for tunnels with options

[Gavin Li]

For tunnels with options, eg, geneve and vxlan with gbp, they share the
same way to compare the headers and options. Extract the code as a common
function for them.

Signed-off-by: Gavin Li <gavinl@nvidia.com>
Reviewed-by: Gavi Teitz <gavi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Acked-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../ethernet/mellanox/mlx5/core/en/tc_tun.h   |  3 ++
 .../mellanox/mlx5/core/en/tc_tun_encap.c      | 32 +++++++++++++++++++
 .../mellanox/mlx5/core/en/tc_tun_geneve.c     | 24 +-------------
 3 files changed, 36 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h
index b38f693bbb52..92065568bb19 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h
@@ -115,6 +115,9 @@ int mlx5e_tc_tun_parse_udp_ports(struct mlx5e_priv *priv,
 bool mlx5e_tc_tun_encap_info_equal_generic(struct mlx5e_encap_key *a,
 					   struct mlx5e_encap_key *b);
 
+bool mlx5e_tc_tun_encap_info_equal_options(struct mlx5e_encap_key *a,
+					   struct mlx5e_encap_key *b,
+					   __be16 tun_flags);
 #endif /* CONFIG_MLX5_ESWITCH */
 
 #endif //__MLX5_EN_TC_TUNNEL_H__
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
index 780224fd67a1..a108e73c9f66 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
@@ -3,6 +3,7 @@
 
 #include <net/fib_notifier.h>
 #include <net/nexthop.h>
+#include <net/ip_tunnels.h>
 #include "tc_tun_encap.h"
 #include "en_tc.h"
 #include "tc_tun.h"
@@ -571,6 +572,37 @@ bool mlx5e_tc_tun_encap_info_equal_generic(struct mlx5e_encap_key *a,
 		a->tc_tunnel->tunnel_type == b->tc_tunnel->tunnel_type;
 }
 
+bool mlx5e_tc_tun_encap_info_equal_options(struct mlx5e_encap_key *a,
+					   struct mlx5e_encap_key *b,
+					   __be16 tun_flags)
+{
+	struct ip_tunnel_info *a_info;
+	struct ip_tunnel_info *b_info;
+	bool a_has_opts, b_has_opts;
+
+	if (!mlx5e_tc_tun_encap_info_equal_generic(a, b))
+		return false;
+
+	a_has_opts = !!(a->ip_tun_key->tun_flags & tun_flags);
+	b_has_opts = !!(b->ip_tun_key->tun_flags & tun_flags);
+
+	/* keys are equal when both don't have any options attached */
+	if (!a_has_opts && !b_has_opts)
+		return true;
+
+	if (a_has_opts != b_has_opts)
+		return false;
+
+	/* options stored in memory next to ip_tunnel_info struct */
+	a_info = container_of(a->ip_tun_key, struct ip_tunnel_info, key);
+	b_info = container_of(b->ip_tun_key, struct ip_tunnel_info, key);
+
+	return a_info->options_len == b_info->options_len &&
+	       !memcmp(ip_tunnel_info_opts(a_info),
+		       ip_tunnel_info_opts(b_info),
+		       a_info->options_len);
+}
+
 static int cmp_decap_info(struct mlx5e_decap_key *a,
 			  struct mlx5e_decap_key *b)
 {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_geneve.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_geneve.c
index 054d80c4e65c..2bcd10b6d653 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_geneve.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_geneve.c
@@ -337,29 +337,7 @@ static int mlx5e_tc_tun_parse_geneve(struct mlx5e_priv *priv,
 static bool mlx5e_tc_tun_encap_info_equal_geneve(struct mlx5e_encap_key *a,
 						 struct mlx5e_encap_key *b)
 {
-	struct ip_tunnel_info *a_info;
-	struct ip_tunnel_info *b_info;
-	bool a_has_opts, b_has_opts;
-
-	if (!mlx5e_tc_tun_encap_info_equal_generic(a, b))
-		return false;
-
-	a_has_opts = !!(a->ip_tun_key->tun_flags & TUNNEL_GENEVE_OPT);
-	b_has_opts = !!(b->ip_tun_key->tun_flags & TUNNEL_GENEVE_OPT);
-
-	/* keys are equal when both don't have any options attached */
-	if (!a_has_opts && !b_has_opts)
-		return true;
-
-	if (a_has_opts != b_has_opts)
-		return false;
-
-	/* geneve options stored in memory next to ip_tunnel_info struct */
-	a_info = container_of(a->ip_tun_key, struct ip_tunnel_info, key);
-	b_info = container_of(b->ip_tun_key, struct ip_tunnel_info, key);
-
-	return a_info->options_len == b_info->options_len &&
-		memcmp(a_info + 1, b_info + 1, a_info->options_len) == 0;
+	return mlx5e_tc_tun_encap_info_equal_options(a, b, TUNNEL_GENEVE_OPT);
 }
 
 struct mlx5e_tc_tunnel geneve_tunnel = {
-- 
2.31.1

[PATCH net-next v6 4/5] ip_tunnel: Preserve pointer const in ip_tunnel_info_opts

[Gavin Li]

Change ip_tunnel_info_opts( ) from static function to macro to cast return
value and preserve the const-ness of the pointer.

Signed-off-by: Gavin Li <gavinl@nvidia.com>
---
 include/net/ip_tunnels.h | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index fca357679816..3e5c102b841f 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -67,6 +67,12 @@ struct ip_tunnel_key {
 	GENMASK((sizeof_field(struct ip_tunnel_info,		\
 			      options_len) * BITS_PER_BYTE) - 1, 0)
 
+#define ip_tunnel_info_opts(info)				\
+	_Generic(info,						\
+		const typeof(*(info)) * : ((const void *)((info) + 1)),\
+		default : ((void *)((info) + 1))		\
+	)
+
 struct ip_tunnel_info {
 	struct ip_tunnel_key	key;
 #ifdef CONFIG_DST_CACHE
@@ -485,11 +491,6 @@ static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len)
 	}
 }
 
-static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info)
-{
-	return info + 1;
-}
-
 static inline void ip_tunnel_info_opts_get(void *to,
 					   const struct ip_tunnel_info *info)
 {
-- 
2.31.1

[PATCH net-next v6 5/5] net/mlx5e: TC, Add support for VxLAN GBP encap/decap flows offload

[Gavin Li]

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

Signed-off-by: Gavin Li <gavinl@nvidia.com>
Reviewed-by: Gavi Teitz <gavi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Acked-by: Saeed Mahameed <saeedm@nvidia.com>
---
 .../mellanox/mlx5/core/en/tc_tun_vxlan.c      | 76 ++++++++++++++++++-
 include/linux/mlx5/device.h                   |  6 ++
 include/linux/mlx5/mlx5_ifc.h                 | 13 +++-
 3 files changed, 91 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..570561f6a1b7 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) &&
+	    e->tun_info->options_len != sizeof(*md))
 		return -EOPNOTSUPP;
 	vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
 	*ip_proto = IPPROTO_UDP;
@@ -96,6 +99,61 @@ 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(e->tun_info);
+		vxlan_build_gbp_hdr(vxh, md);
+	}
+
+	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");
+		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_FMT_MOD(extack, "Wrong VxLAN GBP mask(0x%08X)\n", *gbp_mask);
+		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;
 }
@@ -122,6 +180,14 @@ static int mlx5e_tc_tun_parse_vxlan(struct mlx5e_priv *priv,
 	if (!enc_keyid.mask->keyid)
 		return 0;
 
+	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_OPTS)) {
+		int err;
+
+		err = mlx5e_tc_tun_parse_vxlan_gbp_option(priv, spec, f);
+		if (err)
+			return err;
+	}
+
 	/* match on VNI is required */
 
 	if (!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
@@ -143,6 +209,12 @@ static int mlx5e_tc_tun_parse_vxlan(struct mlx5e_priv *priv,
 	return 0;
 }
 
+static bool mlx5e_tc_tun_encap_info_equal_vxlan(struct mlx5e_encap_key *a,
+						struct mlx5e_encap_key *b)
+{
+	return mlx5e_tc_tun_encap_info_equal_options(a, b, TUNNEL_VXLAN_OPT);
+}
+
 static int mlx5e_tc_tun_get_remote_ifindex(struct net_device *mirred_dev)
 {
 	const struct vxlan_dev *vxlan = netdev_priv(mirred_dev);
@@ -160,6 +232,6 @@ struct mlx5e_tc_tunnel vxlan_tunnel = {
 	.generate_ip_tun_hdr  = mlx5e_gen_ip_tunnel_header_vxlan,
 	.parse_udp_ports      = mlx5e_tc_tun_parse_udp_ports_vxlan,
 	.parse_tunnel         = mlx5e_tc_tun_parse_vxlan,
-	.encap_info_equal     = mlx5e_tc_tun_encap_info_equal_generic,
+	.encap_info_equal     = mlx5e_tc_tun_encap_info_equal_vxlan,
 	.get_remote_ifindex   = mlx5e_tc_tun_get_remote_ifindex,
 };
diff --git a/include/linux/mlx5/device.h b/include/linux/mlx5/device.h
index 71b06ebad402..af4dd536a52c 100644
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -1357,6 +1357,12 @@ enum mlx5_qcam_feature_groups {
 #define MLX5_CAP_ESW_INGRESS_ACL_MAX(mdev, cap) \
 	MLX5_CAP_ESW_FLOWTABLE_MAX(mdev, flow_table_properties_esw_acl_ingress.cap)
 
+#define MLX5_CAP_ESW_FT_FIELD_SUPPORT_2(mdev, cap) \
+	MLX5_CAP_ESW_FLOWTABLE(mdev, ft_field_support_2_esw_fdb.cap)
+
+#define MLX5_CAP_ESW_FT_FIELD_SUPPORT_2_MAX(mdev, cap) \
+	MLX5_CAP_ESW_FLOWTABLE_MAX(mdev, ft_field_support_2_esw_fdb.cap)
+
 #define MLX5_CAP_ESW(mdev, cap) \
 	MLX5_GET(e_switch_cap, \
 		 mdev->caps.hca[MLX5_CAP_ESWITCH]->cur, cap)
diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 5ad5126615a1..163cc0638c37 100644
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -404,10 +404,13 @@ struct mlx5_ifc_flow_table_fields_supported_bits {
 	u8         metadata_reg_c_0[0x1];
 };
 
+/* Table 2170 - Flow Table Fields Supported 2 Format */
 struct mlx5_ifc_flow_table_fields_supported_2_bits {
 	u8         reserved_at_0[0xe];
 	u8         bth_opcode[0x1];
-	u8         reserved_at_f[0x11];
+	u8         reserved_at_f[0x1];
+	u8         tunnel_header_0_1[0x1];
+	u8         reserved_at_11[0xf];
 
 	u8         reserved_at_20[0x60];
 };
@@ -895,7 +898,13 @@ struct mlx5_ifc_flow_table_eswitch_cap_bits {
 
 	struct mlx5_ifc_flow_table_prop_layout_bits flow_table_properties_esw_acl_egress;
 
-	u8      reserved_at_800[0x1000];
+	u8      reserved_at_800[0xC00];
+
+	struct mlx5_ifc_flow_table_fields_supported_2_bits ft_field_support_2_esw_fdb;
+
+	struct mlx5_ifc_flow_table_fields_supported_2_bits ft_field_bitmask_support_2_esw_fdb;
+
+	u8      reserved_at_1500[0x300];
 
 	u8      sw_steering_fdb_action_drop_icm_address_rx[0x40];
 
-- 
2.31.1

Re: [PATCH net-next v6 4/5] ip_tunnel: Preserve pointer const in ip_tunnel_info_opts

[Eric Dumazet]

On Thu, Mar 9, 2023 at 2:48 PM Gavin Li <gavinl@nvidia.com> wrote:
>
> Change ip_tunnel_info_opts( ) from static function to macro to cast return
> value and preserve the const-ness of the pointer.
>
> Signed-off-by: Gavin Li <gavinl@nvidia.com>
> ---
>  include/net/ip_tunnels.h | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
> index fca357679816..3e5c102b841f 100644
> --- a/include/net/ip_tunnels.h
> +++ b/include/net/ip_tunnels.h
> @@ -67,6 +67,12 @@ struct ip_tunnel_key {
>         GENMASK((sizeof_field(struct ip_tunnel_info,            \
>                               options_len) * BITS_PER_BYTE) - 1, 0)
>
> +#define ip_tunnel_info_opts(info)                              \
> +       _Generic(info,                                          \
> +               const typeof(*(info)) * : ((const void *)((info) + 1)),\
> +               default : ((void *)((info) + 1))                \
> +       )
> +

Hmm...

This looks quite dangerous, we lost type safety with the 'default'
case, with all these casts.

What about using something cleaner instead ?

(Not sure why we do not have an available generic helper for this kind
of repetitive things)

diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index fca3576798166416982ee6a9100b003810c49830..7f26e07c5f3059d426b31529e4d1c3adec23d70f
100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -485,10 +485,11 @@ static inline void iptunnel_xmit_stats(struct
net_device *dev, int pkt_len)
        }
 }

-static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info)
-{
-       return info + 1;
-}
+#define ip_tunnel_info_opts(info)                              \
+       (_Generic(info,                                         \
+                const struct ip_tunnel_info * : ((info) + 1),  \
+                struct ip_tunnel_info * : ((info) + 1))        \
+       )

 static inline void ip_tunnel_info_opts_get(void *to,
                                           const struct ip_tunnel_info *info)

Re: [PATCH net-next v6 4/5] ip_tunnel: Preserve pointer const in ip_tunnel_info_opts

[Eric Dumazet]

On Thu, Mar 9, 2023 at 3:59 PM Eric Dumazet <edumazet@google.com> wrote:
>
> On Thu, Mar 9, 2023 at 2:48 PM Gavin Li <gavinl@nvidia.com> wrote:
> >
> > Change ip_tunnel_info_opts( ) from static function to macro to cast return
> > value and preserve the const-ness of the pointer.
> >
> > Signed-off-by: Gavin Li <gavinl@nvidia.com>
> > ---
> >  include/net/ip_tunnels.h | 11 ++++++-----
> >  1 file changed, 6 insertions(+), 5 deletions(-)
> >
> > diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
> > index fca357679816..3e5c102b841f 100644
> > --- a/include/net/ip_tunnels.h
> > +++ b/include/net/ip_tunnels.h
> > @@ -67,6 +67,12 @@ struct ip_tunnel_key {
> >         GENMASK((sizeof_field(struct ip_tunnel_info,            \
> >                               options_len) * BITS_PER_BYTE) - 1, 0)
> >
> > +#define ip_tunnel_info_opts(info)                              \
> > +       _Generic(info,                                          \
> > +               const typeof(*(info)) * : ((const void *)((info) + 1)),\
> > +               default : ((void *)((info) + 1))                \
> > +       )
> > +
>
> Hmm...
>
> This looks quite dangerous, we lost type safety with the 'default'
> case, with all these casts.
>
> What about using something cleaner instead ?
>
> (Not sure why we do not have an available generic helper for this kind
> of repetitive things)
>

Or more exactly :

diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index fca3576798166416982ee6a9100b003810c49830..17fc6c8f7e0b9e5303c1fb9e5dad77c5310e01a9
100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -485,10 +485,11 @@ static inline void iptunnel_xmit_stats(struct
net_device *dev, int pkt_len)
        }
 }

-static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info)
-{
-       return info + 1;
-}
+#define ip_tunnel_info_opts(info)                                      \
+       (_Generic(info,                                                 \
+                const struct ip_tunnel_info * : (const void *)((info)
+ 1),    \
+                struct ip_tunnel_info * : (void *)((info) + 1))        \
+       )

 static inline void ip_tunnel_info_opts_get(void *to,
                                           const struct ip_tunnel_info *info)

Re: [PATCH net-next v6 4/5] ip_tunnel: Preserve pointer const in ip_tunnel_info_opts

[Simon Horman]

On Thu, Mar 09, 2023 at 04:05:13PM +0100, Eric Dumazet wrote:
> On Thu, Mar 9, 2023 at 3:59 PM Eric Dumazet <edumazet@google.com> wrote:
> >
> > On Thu, Mar 9, 2023 at 2:48 PM Gavin Li <gavinl@nvidia.com> wrote:
> > >
> > > Change ip_tunnel_info_opts( ) from static function to macro to cast return
> > > value and preserve the const-ness of the pointer.
> > >
> > > Signed-off-by: Gavin Li <gavinl@nvidia.com>
> > > ---
> > >  include/net/ip_tunnels.h | 11 ++++++-----
> > >  1 file changed, 6 insertions(+), 5 deletions(-)
> > >
> > > diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
> > > index fca357679816..3e5c102b841f 100644
> > > --- a/include/net/ip_tunnels.h
> > > +++ b/include/net/ip_tunnels.h
> > > @@ -67,6 +67,12 @@ struct ip_tunnel_key {
> > >         GENMASK((sizeof_field(struct ip_tunnel_info,            \
> > >                               options_len) * BITS_PER_BYTE) - 1, 0)
> > >
> > > +#define ip_tunnel_info_opts(info)                              \
> > > +       _Generic(info,                                          \
> > > +               const typeof(*(info)) * : ((const void *)((info) + 1)),\
> > > +               default : ((void *)((info) + 1))                \
> > > +       )
> > > +
> >
> > Hmm...
> >
> > This looks quite dangerous, we lost type safety with the 'default'
> > case, with all these casts.

Thanks Eric,

FWIIW, the feedback I gave earlier, which partly brought about this change,
was based around avoiding casts...

> >
> > What about using something cleaner instead ?
> >
> > (Not sure why we do not have an available generic helper for this kind
> > of repetitive things)
> >
> 
> Or more exactly :

... So, yes, this looks better to me.

> diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
> index fca3576798166416982ee6a9100b003810c49830..17fc6c8f7e0b9e5303c1fb9e5dad77c5310e01a9
> 100644
> --- a/include/net/ip_tunnels.h
> +++ b/include/net/ip_tunnels.h
> @@ -485,10 +485,11 @@ static inline void iptunnel_xmit_stats(struct
> net_device *dev, int pkt_len)
>         }
>  }
> 
> -static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info)
> -{
> -       return info + 1;
> -}
> +#define ip_tunnel_info_opts(info)                                      \
> +       (_Generic(info,                                                 \
> +                const struct ip_tunnel_info * : (const void *)((info)
> + 1),    \
> +                struct ip_tunnel_info * : (void *)((info) + 1))        \
> +       )
> 
>  static inline void ip_tunnel_info_opts_get(void *to,
>                                            const struct ip_tunnel_info *info)
> 

Re: [PATCH net-next v6 4/5] ip_tunnel: Preserve pointer const in ip_tunnel_info_opts

[Gavin Li]

On 3/9/2023 11:05 PM, Eric Dumazet wrote:
> External email: Use caution opening links or attachments
>
>
> On Thu, Mar 9, 2023 at 3:59 PM Eric Dumazet <edumazet@google.com> wrote:
>> On Thu, Mar 9, 2023 at 2:48 PM Gavin Li <gavinl@nvidia.com> wrote:
>>> Change ip_tunnel_info_opts( ) from static function to macro to cast return
>>> value and preserve the const-ness of the pointer.
>>>
>>> Signed-off-by: Gavin Li <gavinl@nvidia.com>
>>> ---
>>>   include/net/ip_tunnels.h | 11 ++++++-----
>>>   1 file changed, 6 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
>>> index fca357679816..3e5c102b841f 100644
>>> --- a/include/net/ip_tunnels.h
>>> +++ b/include/net/ip_tunnels.h
>>> @@ -67,6 +67,12 @@ struct ip_tunnel_key {
>>>          GENMASK((sizeof_field(struct ip_tunnel_info,            \
>>>                                options_len) * BITS_PER_BYTE) - 1, 0)
>>>
>>> +#define ip_tunnel_info_opts(info)                              \
>>> +       _Generic(info,                                          \
>>> +               const typeof(*(info)) * : ((const void *)((info) + 1)),\
>>> +               default : ((void *)((info) + 1))                \
>>> +       )
>>> +
>> Hmm...
>>
>> This looks quite dangerous, we lost type safety with the 'default'
>> case, with all these casts.
>>
>> What about using something cleaner instead ?
>>
>> (Not sure why we do not have an available generic helper for this kind
>> of repetitive things)
>>
> Or more exactly :
>
> diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
> index fca3576798166416982ee6a9100b003810c49830..17fc6c8f7e0b9e5303c1fb9e5dad77c5310e01a9
> 100644
> --- a/include/net/ip_tunnels.h
> +++ b/include/net/ip_tunnels.h
> @@ -485,10 +485,11 @@ static inline void iptunnel_xmit_stats(struct
> net_device *dev, int pkt_len)
>          }
>   }
>
> -static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info)
> -{
> -       return info + 1;
> -}
> +#define ip_tunnel_info_opts(info)                                      \
> +       (_Generic(info,                                                 \
> +                const struct ip_tunnel_info * : (const void *)((info)
> + 1),    \
> +                struct ip_tunnel_info * : (void *)((info) + 1))        \
> +       )
>
>   static inline void ip_tunnel_info_opts_get(void *to,
>                                             const struct ip_tunnel_info *info)
ACK