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authorSantwona Behera <santwona.behera@sun.com>2008-07-02 03:47:41 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-02 03:47:41 -0700
commit0853ad66b14feb12acde7ac13b7c3b75770a0adc (patch)
tree0091f893aec69d708ec37ed9e56e1467fd5c95d8
parentecbed6a41900126e7b9509e12a8d0cc22176e3eb (diff)
netdev: Add support for rx flow hash configuration, using ethtool.
Added new interfaces to ethtool to configure receive network flow distribution across multiple rx rings using hashing. Signed-off-by: Santwona Behera <santwona.behera@sun.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/ethtool.h33
-rw-r--r--net/core/ethtool.c37
2 files changed, 70 insertions, 0 deletions
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index c8d21635786..8bb5e87df36 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -272,6 +272,12 @@ enum ethtool_flags {
ETH_FLAG_LRO = (1 << 15), /* LRO is enabled */
};
+struct ethtool_rxnfc {
+ __u32 cmd;
+ __u32 flow_type;
+ __u64 data;
+};
+
#ifdef __KERNEL__
struct net_device;
@@ -396,6 +402,8 @@ struct ethtool_ops {
/* the following hooks are obsolete */
int (*self_test_count)(struct net_device *);/* use get_sset_count */
int (*get_stats_count)(struct net_device *);/* use get_sset_count */
+ int (*get_rxhash)(struct net_device *, struct ethtool_rxnfc *);
+ int (*set_rxhash)(struct net_device *, struct ethtool_rxnfc *);
};
#endif /* __KERNEL__ */
@@ -442,6 +450,9 @@ struct ethtool_ops {
#define ETHTOOL_GPFLAGS 0x00000027 /* Get driver-private flags bitmap */
#define ETHTOOL_SPFLAGS 0x00000028 /* Set driver-private flags bitmap */
+#define ETHTOOL_GRXFH 0x00000029 /* Get RX flow hash configuration */
+#define ETHTOOL_SRXFH 0x0000002a /* Set RX flow hash configuration */
+
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
#define SPARC_ETH_SSET ETHTOOL_SSET
@@ -528,4 +539,26 @@ struct ethtool_ops {
#define WAKE_MAGIC (1 << 5)
#define WAKE_MAGICSECURE (1 << 6) /* only meaningful if WAKE_MAGIC */
+/* L3-L4 network traffic flow types */
+#define TCP_V4_FLOW 0x01
+#define UDP_V4_FLOW 0x02
+#define SCTP_V4_FLOW 0x03
+#define AH_ESP_V4_FLOW 0x04
+#define TCP_V6_FLOW 0x05
+#define UDP_V6_FLOW 0x06
+#define SCTP_V6_FLOW 0x07
+#define AH_ESP_V6_FLOW 0x08
+
+/* L3-L4 network traffic flow hash options */
+#define RXH_DEV_PORT (1 << 0)
+#define RXH_L2DA (1 << 1)
+#define RXH_VLAN (1 << 2)
+#define RXH_L3_PROTO (1 << 3)
+#define RXH_IP_SRC (1 << 4)
+#define RXH_IP_DST (1 << 5)
+#define RXH_L4_B_0_1 (1 << 6) /* src port in case of TCP/UDP/SCTP */
+#define RXH_L4_B_2_3 (1 << 7) /* dst port in case of TCP/UDP/SCTP */
+#define RXH_DISCARD (1 << 31)
+
+
#endif /* _LINUX_ETHTOOL_H */
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 0133b5ebd54..14ada537f89 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -209,6 +209,36 @@ static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
return 0;
}
+static int ethtool_set_rxhash(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_rxnfc cmd;
+
+ if (!dev->ethtool_ops->set_rxhash)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->set_rxhash(dev, &cmd);
+}
+
+static int ethtool_get_rxhash(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_rxnfc info;
+
+ if (!dev->ethtool_ops->get_rxhash)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&info, useraddr, sizeof(info)))
+ return -EFAULT;
+
+ dev->ethtool_ops->get_rxhash(dev, &info);
+
+ if (copy_to_user(useraddr, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+}
+
static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
{
struct ethtool_regs regs;
@@ -826,6 +856,7 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_GGSO:
case ETHTOOL_GFLAGS:
case ETHTOOL_GPFLAGS:
+ case ETHTOOL_GRXFH:
break;
default:
if (!capable(CAP_NET_ADMIN))
@@ -977,6 +1008,12 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
rc = ethtool_set_value(dev, useraddr,
dev->ethtool_ops->set_priv_flags);
break;
+ case ETHTOOL_GRXFH:
+ rc = ethtool_get_rxhash(dev, useraddr);
+ break;
+ case ETHTOOL_SRXFH:
+ rc = ethtool_set_rxhash(dev, useraddr);
+ break;
default:
rc = -EOPNOTSUPP;
}