[PATCH net-next v3 3/5] net/mlx5e: Add helper for encap_info_equal for tunnels with options

From: Gavin Li
Date: Thu Feb 16 2023 - 22:40:29 EST


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@xxxxxxxxxx>
Reviewed-by: Gavi Teitz <gavi@xxxxxxxxxx>
Reviewed-by: Roi Dayan <roid@xxxxxxxxxx>
Reviewed-by: Maor Dickman <maord@xxxxxxxxxx>
Acked-by: Saeed Mahameed <saeedm@xxxxxxxxxx>
---
.../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..f1d132f16fcc 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