signalfd: Add protobuf descriptions

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

protobuf/Makefile

@@ -30,6 +30,7 @@ PROTO_FILES	+= eventfd.proto
 PROTO_FILES	+= eventpoll.proto
 PROTO_FILES	+= fh.proto
 PROTO_FILES	+= inotify.proto
+PROTO_FILES	+= signalfd.proto
 PROTO_FILES	+= fs.proto
 PROTO_FILES	+= pstree.proto
 PROTO_FILES	+= pipe.proto

protobuf/fdinfo.proto

@@ -8,6 +8,7 @@ enum fd_types {
 	EVENTFD		= 6;
 	EVENTPOLL	= 7;
 	INOTIFY		= 8;
+	SIGNALFD	= 9;
 }
 
 message fdinfo_entry {

protobuf/signalfd.proto

+import "fown.proto";
+
+message signalfd_entry {
+	required uint32		id		= 1;
+	required uint32		flags		= 2;
+	required fown_entry	fown		= 3;
+	required uint64		sigmask		= 4;
+};