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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>
This commit is contained in:
Santwona Behera 2008-07-02 03:47:41 -07:00 committed by David S. Miller
parent ecbed6a419
commit 0853ad66b1
2 changed files with 70 additions and 0 deletions
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33
include/linux/ethtool.h
View File

@ -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 */

37
net/core/ethtool.c
View File

@ -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;
}