Date:	Fri, 14 Aug 2015 09:50:02 +0000
From:	Premkumar Jonnala <pjonnala@...adcom.com>
To:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH] iproute2: Extend bridge command to configure ageing
 interval on bridge devices.

Extend bridge command to configure and retrieve ageing interval for bridge
devices.  Netlink messaging is used to configure and retrieve the ageing
interval.

Signed-off-by: Premkumar Jonnala <pjonnala@...adcom.com>

---

diff --git a/bridge/br_common.h b/bridge/br_common.h
index 169a162..85cca68 100644
--- a/bridge/br_common.h
+++ b/bridge/br_common.h
@@ -5,12 +5,15 @@ extern int print_fdb(const struct sockaddr_nl *who,
 		     struct nlmsghdr *n, void *arg);
 extern int print_mdb(const struct sockaddr_nl *who,
 		     struct nlmsghdr *n, void *arg);
+extern int print_ageinfo(const struct sockaddr_nl *who,
+			 struct nlmsghdr *n, void *arg);
 
 extern int do_fdb(int argc, char **argv);
 extern int do_mdb(int argc, char **argv);
 extern int do_monitor(int argc, char **argv);
 extern int do_vlan(int argc, char **argv);
 extern int do_link(int argc, char **argv);
+extern int do_ageing(int argc, char **argv);
 
 extern int preferred_family;
 extern int show_stats;
diff --git a/bridge/bridge.c b/bridge/bridge.c
index eaf09c8..cf193d5 100644
--- a/bridge/bridge.c
+++ b/bridge/bridge.c
@@ -31,7 +31,7 @@ static void usage(void)
 {
 	fprintf(stderr,
 "Usage: bridge [ OPTIONS ] OBJECT { COMMAND | help }\n"
-"where	OBJECT := { link | fdb | mdb | vlan | monitor }\n"
+"where	OBJECT := { link | fdb | mdb | vlan | monitor | ageing }\n"
 "	OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] |\n"
 "		     -o[neline] | -t[imestamp] | -n[etns] name |\n"
 "		     -c[ompressvlans] }\n");
@@ -53,6 +53,7 @@ static const struct cmd {
 	{ "mdb",	do_mdb },
 	{ "vlan",	do_vlan },
 	{ "monitor",	do_monitor },
+	{ "ageing",      do_ageing },
 	{ "help",	do_help },
 	{ 0 }
 };
diff --git a/bridge/fdb.c b/bridge/fdb.c
index bd7e4f9..55c96f7 100644
--- a/bridge/fdb.c
+++ b/bridge/fdb.c
@@ -21,6 +21,7 @@
 #include <linux/neighbour.h>
 #include <string.h>
 #include <limits.h>
+#include <errno.h>
 
 #include "libnetlink.h"
 #include "br_common.h"
@@ -371,6 +372,161 @@ static int fdb_modify(int cmd, int flags, int argc, char **argv)
 	return 0;
 }
 
+static void ageing_usage(void)
+{
+	fprintf(stderr, "Usage: bridge ageing interval { show | SECONDS | default } dev DEV\n");
+	exit(-1);
+}
+
+int print_ageinfo(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
+{
+	FILE *fp = arg;
+	struct admsg *r = NLMSG_DATA(n);
+	int len = n->nlmsg_len;
+
+	len -= NLMSG_LENGTH(sizeof(*r));
+
+	if (len < 0) {
+		fprintf(stderr, "BUG: wrong nlmsg len%d\n", len);
+		return -1;
+	}
+
+	if (r->adm_family != AF_BRIDGE)
+		return 0;
+	fprintf(fp, "dev %s, ageing %d secs\n",
+		ll_index_to_name(r->adm_ifindex), r->adm_ageing_interval);
+	return 0;
+}
+
+static int do_ageing_show(char *dev)
+{
+	struct {
+		struct nlmsghdr n;
+		struct admsg adm;
+		char buf[256];
+	} req;
+
+	memset(&req, 0, sizeof(req));
+
+	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct admsg));
+	req.n.nlmsg_type = RTM_GETAGEING;
+
+	int br_ifindex = ll_name_to_index(dev);
+
+	if (br_ifindex == 0) {
+		fprintf(stderr, "Cannot find bridge device \"%s\"\n", dev);
+		return -1;
+	}
+
+	req.adm.adm_family = PF_BRIDGE;
+	req.adm.adm_ifindex = br_ifindex;
+
+	if (rtnl_dump_request(&rth, RTM_GETAGEING, &req.adm,
+			      sizeof(struct admsg)) < 0) {
+		perror("Cannot send dump request");
+		exit(1);
+	}
+
+	if (rtnl_dump_filter(&rth, print_ageinfo, stdout) < 0) {
+		fprintf(stderr, "Dump terminated\n");
+		exit(1);
+	}
+	return 0;
+}
+
+static int do_ageing_modify(int default_ageing, int interval, char *dev)
+{
+	struct {
+		struct nlmsghdr n;
+		struct admsg adm;
+		char buf[256];
+	} req;
+
+	memset(&req, 0, sizeof(req));
+
+	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct admsg));
+	req.n.nlmsg_flags = NLM_F_REQUEST;
+
+	if (default_ageing) {
+		req.n.nlmsg_type = RTM_SETDEFAULTAGEING;
+		req.adm.adm_ageing_interval = 0; /* Don't care */
+	} else {
+		req.n.nlmsg_type = RTM_SETAGEING;
+		req.adm.adm_ageing_interval = interval;
+	}
+
+	req.adm.adm_family = PF_BRIDGE;
+	req.adm.adm_ifindex = ll_name_to_index(dev);
+
+	if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
+		return -1;
+
+	return 0;
+}
+
+int do_ageing(int argc, char **argv)
+{
+	int interval = -1;
+	int default_ageing = 0;
+	char *dev = NULL;
+	int show = 0;
+
+	ll_init_map(&rth);
+
+	if (argc > 0) {
+		if (matches(*argv, "interval") == 0) {
+			argv++;
+			argc--;
+		} else {
+			ageing_usage();
+			exit(-1);
+		}
+	}
+
+	if (argc > 0) {
+		if (matches(*argv, "show") == 0) {
+			show = 1;
+		} else if (matches(*argv, "default") == 0) {
+			default_ageing = 1;
+			interval = 0;
+		} else if (matches(*argv, "help") == 0) {
+			ageing_usage();
+			exit(-1);
+		} else {
+			errno = 0;
+			interval = atoi(*argv);
+			if (errno) {
+				ageing_usage();
+				exit(-1);
+			}
+		}
+		argv++;
+		argc--;
+	} else {
+		ageing_usage();
+		exit(-1);
+	}
+
+	if (argc > 0) {
+		NEXT_ARG();
+		dev = *argv;
+	} else {
+		ageing_usage();
+		exit(-1);
+	}
+
+	if (show) {
+		do_ageing_show(dev);
+		return 0;
+	} else if (default_ageing || (interval > 0)) {
+		do_ageing_modify(default_ageing, interval, dev);
+		return 0;
+	}
+
+	fprintf(stderr, "Command unknown, try \'bridge interval help\'");
+	exit(-1);
+}
+
 int do_fdb(int argc, char **argv)
 {
 	ll_init_map(&rth);
diff --git a/include/libnetlink.h b/include/libnetlink.h
index 968034b..9e3f092 100644
--- a/include/libnetlink.h
+++ b/include/libnetlink.h
@@ -161,6 +161,14 @@ extern int rtnl_from_file(FILE *, rtnl_listen_filter_t handler,
 #define NDA_PAYLOAD(n)	NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
 #endif
 
+#ifndef ADA_RTA
+#define ADA_RTA(r) \
+	((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct admsg))))
+#endif
+#ifndef ADA_PAYLOAD
+#define ADA_PAYLOAD(n)	NLMSG_PAYLOAD(n, sizeof(struct admsg))
+#endif
+
 #ifndef NDTA_RTA
 #define NDTA_RTA(r) \
 	((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
index 913bd8e..dac6452 100644
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -198,4 +198,11 @@ enum {
 };
 #define MDBA_SET_ENTRY_MAX (__MDBA_SET_ENTRY_MAX - 1)
 
+struct admsg {
+	__u8 adm_family;
+	__u8 adm_pad1;
+	__u16	adm_pad2;
+	__s32 adm_ifindex;
+	__u16 adm_ageing_interval;
+};
 #endif /* _LINUX_IF_BRIDGE_H */
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index a78f0b3..abc9617 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -139,6 +139,13 @@ enum {
 	RTM_GETNSID = 90,
 #define RTM_GETNSID RTM_GETNSID
 
+	RTM_SETAGEING = 92,
+#define RTM_SETAGEING RTM_SETAGEING
+	RTM_SETDEFAULTAGEING = 93,
+#define RTM_SETDEFAULTAGEING RTM_SETDEFAULTAGEING
+	RTM_GETAGEING = 94,
+#define RTM_GETAGEING RTM_GETAGEING
+
 	__RTM_MAX,
 #define RTM_MAX		(((__RTM_MAX + 3) & ~3) - 1)
 };
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