netdev - [PATCH v4 net-next 12/21] net/mlx5e: TCP flow steering for nvme-tcp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20210211211044.32701-13-borisp@mellanox.com>
Date:   Thu, 11 Feb 2021 23:10:35 +0200
From:   Boris Pismenny <borisp@...lanox.com>
To:     <dsahern@...il.com>, <kuba@...nel.org>, <davem@...emloft.net>,
        <saeedm@...dia.com>, <hch@....de>, <sagi@...mberg.me>,
        <axboe@...com>, <kbusch@...nel.org>, <viro@...iv.linux.org.uk>,
        <edumazet@...gle.com>, <smalin@...vell.com>
CC:     <boris.pismenny@...il.com>, <linux-nvme@...ts.infradead.org>,
        <netdev@...r.kernel.org>, <benishay@...dia.com>,
        <ogerlitz@...dia.com>, <yorayz@...dia.com>,
        Boris Pismenny <borisp@...lanox.com>,
        Ben Ben-Ishay <benishay@...lanox.com>,
        Or Gerlitz <ogerlitz@...lanox.com>,
        Yoray Zack <yorayz@...lanox.com>
Subject: [PATCH v4 net-next  12/21] net/mlx5e: TCP flow steering for nvme-tcp

Both nvme-tcp and tls require tcp flow steering. Compile it for both of
them. Additionally, use reference counting to allocate/free TCP flow
steering.

Signed-off-by: Boris Pismenny <borisp@...lanox.com>
Signed-off-by: Ben Ben-Ishay <benishay@...lanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
Signed-off-by: Yoray Zack <yorayz@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/fs.h        |  4 ++--
 .../net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c  | 10 ++++++++++
 .../net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.h  |  2 +-
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/fs.h b/drivers/net/ethernet/mellanox/mlx5/core/en/fs.h
index a16297e7e2ac..a7fe3a6358ea 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/fs.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/fs.h
@@ -137,7 +137,7 @@ enum {
 	MLX5E_L2_FT_LEVEL,
 	MLX5E_TTC_FT_LEVEL,
 	MLX5E_INNER_TTC_FT_LEVEL,
-#ifdef CONFIG_MLX5_EN_TLS
+#if defined(CONFIG_MLX5_EN_TLS) || defined(CONFIG_MLX5_EN_NVMEOTCP)
 	MLX5E_ACCEL_FS_TCP_FT_LEVEL,
 #endif
 #ifdef CONFIG_MLX5_EN_ARFS
@@ -256,7 +256,7 @@ struct mlx5e_flow_steering {
 #ifdef CONFIG_MLX5_EN_ARFS
 	struct mlx5e_arfs_tables        arfs;
 #endif
-#ifdef CONFIG_MLX5_EN_TLS
+#if defined(CONFIG_MLX5_EN_TLS) || defined(CONFIG_MLX5_EN_NVMEOTCP)
 	struct mlx5e_accel_fs_tcp      *accel_tcp;
 #endif
 };
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c
index e51f60b55daa..21341a92f355 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c
@@ -14,6 +14,7 @@ enum accel_fs_tcp_type {
 struct mlx5e_accel_fs_tcp {
 	struct mlx5e_flow_table tables[ACCEL_FS_TCP_NUM_TYPES];
 	struct mlx5_flow_handle *default_rules[ACCEL_FS_TCP_NUM_TYPES];
+	refcount_t		ref_count;
 };
 
 static enum mlx5e_traffic_types fs_accel2tt(enum accel_fs_tcp_type i)
@@ -337,6 +338,7 @@ static int accel_fs_tcp_enable(struct mlx5e_priv *priv)
 			return err;
 		}
 	}
+	refcount_set(&priv->fs.accel_tcp->ref_count, 1);
 	return 0;
 }
 
@@ -360,6 +362,9 @@ void mlx5e_accel_fs_tcp_destroy(struct mlx5e_priv *priv)
 	if (!priv->fs.accel_tcp)
 		return;
 
+	if (!refcount_dec_and_test(&priv->fs.accel_tcp->ref_count))
+		return;
+
 	accel_fs_tcp_disable(priv);
 
 	for (i = 0; i < ACCEL_FS_TCP_NUM_TYPES; i++)
@@ -376,6 +381,11 @@ int mlx5e_accel_fs_tcp_create(struct mlx5e_priv *priv)
 	if (!MLX5_CAP_FLOWTABLE_NIC_RX(priv->mdev, ft_field_support.outer_ip_version))
 		return -EOPNOTSUPP;
 
+	if (priv->fs.accel_tcp) {
+		refcount_inc(&priv->fs.accel_tcp->ref_count);
+		return 0;
+	}
+
 	priv->fs.accel_tcp = kzalloc(sizeof(*priv->fs.accel_tcp), GFP_KERNEL);
 	if (!priv->fs.accel_tcp)
 		return -ENOMEM;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.h b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.h
index 589235824543..8aff9298183c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.h
@@ -6,7 +6,7 @@
 
 #include "en.h"
 
-#ifdef CONFIG_MLX5_EN_TLS
+#if defined(CONFIG_MLX5_EN_TLS) || defined(CONFIG_MLX5_EN_NVMEOTCP)
 int mlx5e_accel_fs_tcp_create(struct mlx5e_priv *priv);
 void mlx5e_accel_fs_tcp_destroy(struct mlx5e_priv *priv);
 struct mlx5_flow_handle *mlx5e_accel_fs_add_sk(struct mlx5e_priv *priv,
-- 
2.24.1