Commit 5e0c03c8 authored by Ben Greear's avatar Ben Greear Committed by Jeff Kirsher
Browse files

net: Support RX-ALL feature flag.



This flag requests that network devices pass all
received frames up the stack, even ones with errors
such as invalid FCS (frame check sum).  This will
allow sniffers to see bad packets and perhaps
give the user some idea how to fix the problem.
Signed-off-by: default avatarBen Greear <greearb@candelatech.com>
Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 943146de
...@@ -158,3 +158,10 @@ VLANs. This may be not useful, though.] ...@@ -158,3 +158,10 @@ VLANs. This may be not useful, though.]
This requests that the NIC append the Ethernet Frame Checksum (FCS) This requests that the NIC append the Ethernet Frame Checksum (FCS)
to the end of the skb data. This allows sniffers and other tools to to the end of the skb data. This allows sniffers and other tools to
read the CRC recorded by the NIC on receipt of the packet. read the CRC recorded by the NIC on receipt of the packet.
* rx-all
This requests that the NIC receive all possible frames, including errored
frames (such as bad FCS, etc). This can be helpful when sniffing a link with
bad packets on it. Some NICs may receive more packets if also put into normal
PROMISC mdoe.
...@@ -55,6 +55,7 @@ enum { ...@@ -55,6 +55,7 @@ enum {
NETIF_F_NOCACHE_COPY_BIT, /* Use no-cache copyfromuser */ NETIF_F_NOCACHE_COPY_BIT, /* Use no-cache copyfromuser */
NETIF_F_LOOPBACK_BIT, /* Enable loopback */ NETIF_F_LOOPBACK_BIT, /* Enable loopback */
NETIF_F_RXFCS_BIT, /* Append FCS to skb pkt data */ NETIF_F_RXFCS_BIT, /* Append FCS to skb pkt data */
NETIF_F_RXALL_BIT, /* Receive errored frames too */
/* /*
* Add your fresh new feature above and remember to update * Add your fresh new feature above and remember to update
...@@ -100,6 +101,7 @@ enum { ...@@ -100,6 +101,7 @@ enum {
#define NETIF_F_UFO __NETIF_F(UFO) #define NETIF_F_UFO __NETIF_F(UFO)
#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED) #define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
#define NETIF_F_RXFCS __NETIF_F(RXFCS) #define NETIF_F_RXFCS __NETIF_F(RXFCS)
#define NETIF_F_RXALL __NETIF_F(RXALL)
/* Features valid for ethtool to change */ /* Features valid for ethtool to change */
/* = all defined minus driver/device-class-related */ /* = all defined minus driver/device-class-related */
......
...@@ -74,6 +74,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] ...@@ -74,6 +74,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
[NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy", [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
[NETIF_F_LOOPBACK_BIT] = "loopback", [NETIF_F_LOOPBACK_BIT] = "loopback",
[NETIF_F_RXFCS_BIT] = "rx-fcs", [NETIF_F_RXFCS_BIT] = "rx-fcs",
[NETIF_F_RXALL_BIT] = "rx-all",
}; };
static int ethtool_get_features(struct net_device *dev, void __user *useraddr) static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
......
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