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
Remove unused argument (i.e. u32 vxflags) in vxlan_build_gbp_hdr( ) and
vxlan_build_gpe_hdr( ) function arguments.
Signed-off-by: Gavin Li <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
---
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
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 <[email protected]>
Reviewed-by: Gavi Teitz <[email protected]>
Reviewed-by: Roi Dayan <[email protected]>
Reviewed-by: Maor Dickman <[email protected]>
Acked-by: Saeed Mahameed <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
---
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
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 <[email protected]>
Reviewed-by: Gavi Teitz <[email protected]>
Reviewed-by: Roi Dayan <[email protected]>
Reviewed-by: Maor Dickman <[email protected]>
Acked-by: Saeed Mahameed <[email protected]>
---
.../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
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 <[email protected]>
---
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
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 <[email protected]>
Reviewed-by: Gavi Teitz <[email protected]>
Reviewed-by: Roi Dayan <[email protected]>
Reviewed-by: Maor Dickman <[email protected]>
Acked-by: Saeed Mahameed <[email protected]>
---
.../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
On Thu, Mar 9, 2023 at 2:48 PM Gavin Li <[email protected]> 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 <[email protected]>
> ---
> 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)
On Thu, Mar 9, 2023 at 3:59 PM Eric Dumazet <[email protected]> wrote:
>
> On Thu, Mar 9, 2023 at 2:48 PM Gavin Li <[email protected]> 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 <[email protected]>
> > ---
> > 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)
On Thu, Mar 09, 2023 at 04:05:13PM +0100, Eric Dumazet wrote:
> On Thu, Mar 9, 2023 at 3:59 PM Eric Dumazet <[email protected]> wrote:
> >
> > On Thu, Mar 9, 2023 at 2:48 PM Gavin Li <[email protected]> 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 <[email protected]>
> > > ---
> > > 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)
>
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 <[email protected]> wrote:
>> On Thu, Mar 9, 2023 at 2:48 PM Gavin Li <[email protected]> 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 <[email protected]>
>>> ---
>>> 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