teamd: Add support for TIPC link watcher

From: Erik Hugne <erik.hugne@ericsson.com>

The first 4 patches moves the arp/ethtool/icmp/icmpv6 link watchers to
separate files, leaving the generic link watcher code in teamd_link_watch.c.
The last patch adds support for the TIPC link watcher. There is a build-time
check that checks if AF_TIPC/SIOCGETLINKNAME are available (kernel 3.15+),
and only builds in TIPC support in that case.

configure.ac

@@ -101,6 +101,40 @@ AC_ARG_ENABLE([zmq],
 	fi
 fi
 
+AC_MSG_CHECKING([if TIPC is available and supports link state supervision])
+AC_COMPILE_IFELSE([
+	AC_LANG_PROGRAM([[
+		#include <stdlib.h>
+		#include <string.h>
+		#include <errno.h>
+		#include <sys/socket.h>
+		#include <sys/ioctl.h>
+		#include <netinet/in.h>
+		#include <linux/tipc.h>
+		]],[[
+                #ifndef TIPC_LINK_STATE
+		#error TIPC link state monitoring is not available for your kernel
+		#endif
+		int sd = 0;
+		struct tipc_sioc_ln_req lnr = { 0 };
+
+		if ((sd = socket(AF_TIPC, SOCK_SEQPACKET, 0)) == -1) {
+			return errno;
+		}
+		lnr.peer = 0;
+		lnr.bearer_id = 0;
+		if ((ioctl(sd, SIOCGETLINKNAME, &lnr) < 0) < 0) {
+			return errno;
+		}
+		]])],
+               [teamd_tipc_support=yes],
+               [teamd_tipc_support=no])
+AC_MSG_RESULT([$teamd_tipc_support])
+if test "x$teamd_tipc_support" = "xyes"; then
+	AC_DEFINE(TEAMD_ENABLE_TIPC, 1, [TIPC support enabled])
+fi
+AM_CONDITIONAL(TEAMD_ENABLE_TIPC, test "x$teamd_tipc_support" = "xyes")
+
 AC_CONFIG_FILES([Makefile
 include/Makefile \
 libteam/Makefile \

teamd/Makefile.am

@@ -13,13 +13,18 @@ teamd_LDADD = $(top_builddir)/libteam/libteam.la $(LIBDAEMON_LIBS) $(JANSSON_LIB
 bin_PROGRAMS=teamd
 teamd_SOURCES=teamd.c teamd_common.c teamd_json.c teamd_config.c teamd_state.c \
 	      teamd_workq.c teamd_events.c teamd_per_port.c \
-	      teamd_option_watch.c teamd_ifinfo_watch.c teamd_link_watch.c \
-	      teamd_ctl.c teamd_dbus.c teamd_zmq.c teamd_usock.c \
-	      teamd_phys_port_check.c teamd_bpf_chef.c teamd_hash_func.c \
-	      teamd_balancer.c teamd_runner_basic_ones.c \
+	      teamd_option_watch.c teamd_ifinfo_watch.c teamd_lw_ethtool.c \
+	      teamd_lw_psr.c teamd_lw_arp_ping.c teamd_lw_nsna_ping.c \
+	      teamd_link_watch.c teamd_ctl.c teamd_dbus.c teamd_zmq.c \
+	      teamd_usock.c teamd_phys_port_check.c teamd_bpf_chef.c \
+	      teamd_hash_func.c teamd_balancer.c teamd_runner_basic_ones.c \
 	      teamd_runner_activebackup.c teamd_runner_loadbalance.c \
 	      teamd_runner_lacp.c
 
+if TEAMD_ENABLE_TIPC
+teamd_SOURCES+=teamd_lw_tipc.c
+endif
+
 EXTRA_DIST = example_configs dbus redhat
 
 noinst_HEADERS = teamd.h teamd_workq.h teamd_bpf_chef.h teamd_ctl.h \

teamd/example_configs/activebackup_tipc.conf

@@ -0,0 +1,22 @@
+{
+	"device":	"team0",
+	"runner":	{"name": "activebackup"},
+	"ports":	{
+		"eth0": {
+			"link_watch": {
+			"name": "tipc",
+				"tipc_bearer": "vlan0"
+			},
+			"sticky": true,
+			"prio": 10
+		},
+		"eth1": {
+			"link_watch": {
+				"name": "tipc",
+				"tipc_bearer": "vlan1"
+			},
+			"sticky": true,
+			"prio": 10
+		}
+	}
+}