[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1308285007-11302-2-git-send-email-greearb@candelatech.com>
Date: Thu, 16 Jun 2011 21:30:06 -0700
From: greearb@...delatech.com
To: netdev@...r.kernel.org
Cc: Ben Greear <greearb@...delatech.com>
Subject: [RFC 1/2] net: Support getting/setting RX-FCS in drivers.
From: Ben Greear <greearb@...delatech.com>
This will allow us to enable/disable having the Ethernet
frame checksum appended to the skb. Enabling this is
useful when sniffing packets.
In particular, this can be used to test logic that allows
a NIC to receive all frames, even ones with bad checksums.
Signed-off-by: Ben Greear <greearb@...delatech.com>
---
:100644 100644 439b173... e5e8747... M include/linux/ethtool.h
:100644 100644 fd14116... b36bac7... M net/core/ethtool.c
include/linux/ethtool.h | 5 +++++
net/core/ethtool.c | 38 ++++++++++++++++++++++++++++++++++++++
2 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 439b173..e5e8747 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -955,6 +955,8 @@ struct ethtool_ops {
int (*get_dump_data)(struct net_device *,
struct ethtool_dump *, void *);
int (*set_dump)(struct net_device *, struct ethtool_dump *);
+ int (*set_save_fcs)(struct net_device *, u32);
+ int (*get_save_fcs)(struct net_device *, u32 *);
};
#endif /* __KERNEL__ */
@@ -1029,6 +1031,9 @@ struct ethtool_ops {
#define ETHTOOL_SET_DUMP 0x0000003e /* Set dump settings */
#define ETHTOOL_GET_DUMP_FLAG 0x0000003f /* Get dump settings */
#define ETHTOOL_GET_DUMP_DATA 0x00000040 /* Get dump data */
+#define ETHTOOL_GETRXFCS 0x00000041 /* Get RX Save Frame Checksum */
+#define ETHTOOL_SETRXFCS 0x00000042 /* Set RX Save Frame Checksum */
+
/* compatibility with older code */
#define SPARC_ETH_GSET ETHTOOL_GSET
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index fd14116..b36bac7 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1927,6 +1927,38 @@ out:
return ret;
}
+static int ethtool_get_rx_fcs(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_value edata;
+ int rv = 0;
+
+ if (!dev->ethtool_ops->get_save_fcs)
+ return -EOPNOTSUPP;
+
+ rv = dev->ethtool_ops->get_save_fcs(dev, &edata.data);
+ if (rv < 0)
+ return rv;
+
+ if (copy_to_user(useraddr, &edata, sizeof(edata)))
+ return -EFAULT;
+ return 0;
+}
+
+
+static int ethtool_set_rx_fcs(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_value id;
+
+ if (!dev->ethtool_ops->set_save_fcs)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&id, useraddr, sizeof(id)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->set_save_fcs(dev, id.data);
+}
+
+
/* The main entry point in this file. Called from net/core/dev.c */
int dev_ethtool(struct net *net, struct ifreq *ifr)
@@ -2152,6 +2184,12 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_GET_DUMP_DATA:
rc = ethtool_get_dump_data(dev, useraddr);
break;
+ case ETHTOOL_SETRXFCS:
+ rc = ethtool_set_rx_fcs(dev, useraddr);
+ break;
+ case ETHTOOL_GETRXFCS:
+ rc = ethtool_get_rx_fcs(dev, useraddr);
+ break;
default:
rc = -EOPNOTSUPP;
}
--
1.7.3.4
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists