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Date: Thu, 7 Nov 2013 12:19:49 +0200
From: Amir Vadai <amirv@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org, Amir Vadai <amirv@...lanox.com>,
Yevgeny Petrilin <yevgenyp@...lanox.com>,
Or Gerlitz <ogerlitz@...lanox.com>,
Eyal Perry <eyalpe@...lanox.com>
Subject: [PATCH net-next 1/6] net/mlx4_en: Add RFS support in UDP
From: Eyal Perry <eyalpe@...lanox.com>
Modify RFS code to support applying filters for incoming UDP streams.
Signed-off-by: Eyal Perry <eyalpe@...lanox.com>
Signed-off-by: Amir Vadai <amirv@...lanox.com>
---
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 45 +++++++++++++++++++-------
1 file changed, 34 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index b555412..cd61e26 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -102,6 +102,7 @@ struct mlx4_en_filter {
struct list_head next;
struct work_struct work;
+ u8 ip_proto;
__be32 src_ip;
__be32 dst_ip;
__be16 src_port;
@@ -120,14 +121,26 @@ struct mlx4_en_filter {
static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv);
+static enum mlx4_net_trans_rule_id mlx4_ip_proto_to_trans_rule_id(u8 ip_proto)
+{
+ switch (ip_proto) {
+ case IPPROTO_UDP:
+ return MLX4_NET_TRANS_RULE_ID_UDP;
+ case IPPROTO_TCP:
+ return MLX4_NET_TRANS_RULE_ID_TCP;
+ default:
+ return -EPROTONOSUPPORT;
+ }
+};
+
static void mlx4_en_filter_work(struct work_struct *work)
{
struct mlx4_en_filter *filter = container_of(work,
struct mlx4_en_filter,
work);
struct mlx4_en_priv *priv = filter->priv;
- struct mlx4_spec_list spec_tcp = {
- .id = MLX4_NET_TRANS_RULE_ID_TCP,
+ struct mlx4_spec_list spec_tcp_udp = {
+ .id = mlx4_ip_proto_to_trans_rule_id(filter->ip_proto),
{
.tcp_udp = {
.dst_port = filter->dst_port,
@@ -163,9 +176,14 @@ static void mlx4_en_filter_work(struct work_struct *work)
int rc;
__be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
+ if (spec_tcp_udp.id < 0) {
+ en_warn(priv, "RFS: ignoring unsupported ip protocol (%d)\n",
+ filter->ip_proto);
+ goto ignore;
+ }
list_add_tail(&spec_eth.list, &rule.list);
list_add_tail(&spec_ip.list, &rule.list);
- list_add_tail(&spec_tcp.list, &rule.list);
+ list_add_tail(&spec_tcp_udp.list, &rule.list);
rule.qpn = priv->rss_map.qps[filter->rxq_index].qpn;
memcpy(spec_eth.eth.dst_mac, priv->dev->dev_addr, ETH_ALEN);
@@ -183,6 +201,7 @@ static void mlx4_en_filter_work(struct work_struct *work)
if (rc)
en_err(priv, "Error attaching flow. err = %d\n", rc);
+ignore:
mlx4_en_filter_rfs_expire(priv);
filter->activated = 1;
@@ -206,8 +225,8 @@ filter_hash_bucket(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
static struct mlx4_en_filter *
mlx4_en_filter_alloc(struct mlx4_en_priv *priv, int rxq_index, __be32 src_ip,
- __be32 dst_ip, __be16 src_port, __be16 dst_port,
- u32 flow_id)
+ __be32 dst_ip, u8 ip_proto, __be16 src_port,
+ __be16 dst_port, u32 flow_id)
{
struct mlx4_en_filter *filter = NULL;
@@ -221,6 +240,7 @@ mlx4_en_filter_alloc(struct mlx4_en_priv *priv, int rxq_index, __be32 src_ip,
filter->src_ip = src_ip;
filter->dst_ip = dst_ip;
+ filter->ip_proto = ip_proto;
filter->src_port = src_port;
filter->dst_port = dst_port;
@@ -252,7 +272,7 @@ static void mlx4_en_filter_free(struct mlx4_en_filter *filter)
static inline struct mlx4_en_filter *
mlx4_en_filter_find(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
- __be16 src_port, __be16 dst_port)
+ u8 ip_proto, __be16 src_port, __be16 dst_port)
{
struct mlx4_en_filter *filter;
struct mlx4_en_filter *ret = NULL;
@@ -263,6 +283,7 @@ mlx4_en_filter_find(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
filter_chain) {
if (filter->src_ip == src_ip &&
filter->dst_ip == dst_ip &&
+ filter->ip_proto == ip_proto &&
filter->src_port == src_port &&
filter->dst_port == dst_port) {
ret = filter;
@@ -281,6 +302,7 @@ mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
struct mlx4_en_filter *filter;
const struct iphdr *ip;
const __be16 *ports;
+ u8 ip_proto;
__be32 src_ip;
__be32 dst_ip;
__be16 src_port;
@@ -295,18 +317,19 @@ mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
if (ip_is_fragment(ip))
return -EPROTONOSUPPORT;
+ if ((ip->protocol != IPPROTO_TCP) && (ip->protocol != IPPROTO_UDP))
+ return -EPROTONOSUPPORT;
ports = (const __be16 *)(skb->data + nhoff + 4 * ip->ihl);
+ ip_proto = ip->protocol;
src_ip = ip->saddr;
dst_ip = ip->daddr;
src_port = ports[0];
dst_port = ports[1];
- if (ip->protocol != IPPROTO_TCP)
- return -EPROTONOSUPPORT;
-
spin_lock_bh(&priv->filters_lock);
- filter = mlx4_en_filter_find(priv, src_ip, dst_ip, src_port, dst_port);
+ filter = mlx4_en_filter_find(priv, src_ip, dst_ip, ip_proto,
+ src_port, dst_port);
if (filter) {
if (filter->rxq_index == rxq_index)
goto out;
@@ -314,7 +337,7 @@ mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
filter->rxq_index = rxq_index;
} else {
filter = mlx4_en_filter_alloc(priv, rxq_index,
- src_ip, dst_ip,
+ src_ip, dst_ip, ip_proto,
src_port, dst_port, flow_id);
if (!filter) {
ret = -ENOMEM;
--
1.8.3.4
--
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