[PATCH ethtool 2/3] ethtool: Add support for WAKE_FILTER (WoL using filters)

[Florian Fainelli <f.fainelli@gmail.com>]

Add a new character 'f' which can be used to configure an Ethernet
controller to support Wake-on-LAN using filters programmed with the
ethtool::rxnfc and the special action -2 (wake-up filter). This is
useful in particular in the context of devices that must support wake-up
on more complex patterns such as multicast DNS packets.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 ethtool.8.in | 4 +++-
 ethtool.c    | 5 +++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/ethtool.8.in b/ethtool.8.in
index 0a366aa536ae..97c7330fd373 100644
--- a/ethtool.8.in
+++ b/ethtool.8.in
@@ -58,7 +58,7 @@
 .\"
 .\"	\(*WO - wol flags
 .\"
-.ds WO \fBp\fP|\fBu\fP|\fBm\fP|\fBb\fP|\fBa\fP|\fBg\fP|\fBs\fP|\fBd\fP...
+.ds WO \fBp\fP|\fBu\fP|\fBm\fP|\fBb\fP|\fBa\fP|\fBg\fP|\fBs\fP|\fBf|\fBd\fP...
 .\"
 .\"	\(*FL - flow type values
 .\"
@@ -679,6 +679,7 @@ b	Wake on broadcast messages
 a	Wake on ARP
 g	Wake on MagicPacket\[tm]
 s	Enable SecureOn\[tm] password for MagicPacket\[tm]
+f	Wake on filter(s)
 d	T{
 Disable (wake on nothing).  This option clears all previous options.
 T}
@@ -870,6 +871,7 @@ Specifies the Rx queue to send packets to, or some other action.
 nokeep;
 lB	l.
 -1	Drop the matched flow
+-2	Use the matched flow as a Wake-on-LAN filter
 0 or higher	Rx queue to route the flow
 .TE
 .TP
diff --git a/ethtool.c b/ethtool.c
index fb93ae898312..aa2bbe9e4c65 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -931,6 +931,9 @@ static int parse_wolopts(char *optstr, u32 *data)
 		case 's':
 			*data |= WAKE_MAGICSECURE;
 			break;
+		case 'f':
+			*data |= WAKE_FILTER;
+			break;
 		case 'd':
 			*data = 0;
 			break;
@@ -964,6 +967,8 @@ static char *unparse_wolopts(int wolopts)
 			*p++ = 'g';
 		if (wolopts & WAKE_MAGICSECURE)
 			*p++ = 's';
+		if (wolopts & WAKE_FILTER)
+			*p++ = 'f';
 	} else {
 		*p = 'd';
 	}
-- 
2.17.1