https://bugs.gentoo.org/274973

If the routing table that I wanna flush has 60 entries or more, "ip route flush
table foo" fails with the following error:
  Failed to send flush request: Success
  Flush terminated

Patch by Alin Năstac <mrness@gentoo.org>

--- iproute2-2.6.29-1/ip/ipaddress.c
+++ iproute2-2.6.29-1/ip/ipaddress.c
@@ -37,6 +37,8 @@
 
 #define MAX_ROUNDS 10
 
+static struct rtnl_handle rth_flush = { .fd = -1 };
+
 static struct
 {
 	int ifindex;
@@ -339,7 +341,7 @@
 
 static int flush_update(void)
 {
-	if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
+	if (rtnl_send_check(&rth_flush, filter.flushb, filter.flushp) < 0) {
 		perror("Failed to send flush request");
 		return -1;
 	}
@@ -697,6 +699,9 @@
 		filter.flushp = 0;
 		filter.flushe = sizeof(flushb);
 
+		if (rtnl_open(&rth_flush, 0) < 0)
+			return 1;
+
 		while (round < MAX_ROUNDS) {
 			if (rtnl_wilddump_request(&rth, filter.family, RTM_GETADDR) < 0) {
 				perror("Cannot send dump request");
@@ -715,18 +720,20 @@
 						printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
 				}
 				fflush(stdout);
+				rtnl_close(&rth_flush);
 				return 0;
 			}
 			round++;
 			if (flush_update() < 0)
-				return 1;
+				break;
 
 			if (show_stats) {
 				printf("\n*** Round %d, deleting %d addresses ***\n", round, filter.flushed);
 				fflush(stdout);
 			}
 		}
-		fprintf(stderr, "*** Flush remains incomplete after %d rounds. ***\n", MAX_ROUNDS); fflush(stderr);
+		fprintf(stderr, "*** Flush remains incomplete after %d rounds. ***\n", round); fflush(stderr);
+		rtnl_close(&rth_flush);
 		return 1;
 	}
 
--- iproute2-2.6.29-1/ip/ipneigh.c
+++ iproute2-2.6.29-1/ip/ipneigh.c
@@ -32,6 +32,8 @@
 #define NUD_VALID	(NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY)
 #define MAX_ROUNDS	10
 
+static struct rtnl_handle rth_flush = { .fd = -1 };
+
 static struct
 {
 	int family;
@@ -87,7 +89,7 @@
 
 static int flush_update(void)
 {
-	if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
+	if (rtnl_send_check(&rth_flush, filter.flushb, filter.flushp) < 0) {
 		perror("Failed to send flush request");
 		return -1;
 	}
@@ -391,6 +393,9 @@
 		filter.flushe = sizeof(flushb);
 		filter.state &= ~NUD_FAILED;
 
+		if (rtnl_open(&rth_flush, 0) < 0)
+			return 1;
+
 		while (round < MAX_ROUNDS) {
 			if (rtnl_wilddump_request(&rth, filter.family, RTM_GETNEIGH) < 0) {
 				perror("Cannot send dump request");
@@ -409,18 +414,20 @@
 						printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
 				}
 				fflush(stdout);
+				rtnl_close(&rth_flush);
 				return 0;
 			}
 			round++;
 			if (flush_update() < 0)
-				exit(1);
+				break;
+
 			if (show_stats) {
 				printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
 				fflush(stdout);
 			}
 		}
-		printf("*** Flush not complete bailing out after %d rounds\n",
-			MAX_ROUNDS);
+		fprintf(stderr, "*** Flush remains incomplete after %d rounds. ***\n", round); fflush(stderr);
+		rtnl_close(&rth_flush);
 		return 1;
 	}
 
--- iproute2-2.6.29-1/ip/iproute.c
+++ iproute2-2.6.29-1/ip/iproute.c
@@ -37,6 +37,7 @@
 #define RTAX_RTTVAR RTAX_HOPS
 #endif
 
+static struct rtnl_handle rth_flush = { .fd = -1 };
 
 static const char *mx_names[RTAX_MAX+1] = {
 	[RTAX_MTU]	= "mtu",
@@ -112,7 +113,7 @@
 
 static int flush_update(void)
 {
-	if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
+	if (rtnl_send_check(&rth_flush, filter.flushb, filter.flushp) < 0) {
 		perror("Failed to send flush request");
 		return -1;
 	}
@@ -1210,6 +1211,9 @@
 		filter.flushp = 0;
 		filter.flushe = sizeof(flushb);
 
+		if (rtnl_open(&rth_flush, 0) < 0)
+			return 1;
+
 		for (;;) {
 			if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
 				perror("Cannot send dump request");
@@ -1228,6 +1232,7 @@
 						printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
 				}
 				fflush(stdout);
+				rtnl_close(&rth_flush);
 				return 0;
 			}
 			round++;
--- iproute2-2.6.29-1/ip/xfrm_policy.c
+++ iproute2-2.6.29-1/ip/xfrm_policy.c
@@ -756,11 +756,15 @@
 		struct xfrm_buffer xb;
 		char buf[NLMSG_DELETEALL_BUF_SIZE];
 		int i;
+		struct rtnl_handle rth2;
 
 		xb.buf = buf;
 		xb.size = sizeof(buf);
 		xb.rth = &rth;
 
+		if (rtnl_open(&rth2, 0) < 0)
+			exit(1);
+
 		for (i = 0; ; i++) {
 			xb.offset = 0;
 			xb.nlmsg_count = 0;
@@ -783,7 +787,7 @@
 				break;
 			}
 
-			if (rtnl_send_check(&rth, xb.buf, xb.offset) < 0) {
+			if (rtnl_send_check(&rth2, xb.buf, xb.offset) < 0) {
 				perror("Failed to send delete-all request");
 				exit(1);
 			}
@@ -793,6 +797,8 @@
 			xb.offset = 0;
 			xb.nlmsg_count = 0;
 		}
+
+		rtnl_close(&rth2);
 	} else {
 		if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETPOLICY) < 0) {
 			perror("Cannot send dump request");
--- iproute2-2.6.29-1/ip/xfrm_state.c
+++ iproute2-2.6.29-1/ip/xfrm_state.c
@@ -924,11 +924,15 @@
 		struct xfrm_buffer xb;
 		char buf[NLMSG_DELETEALL_BUF_SIZE];
 		int i;
+		struct rtnl_handle rth2;
 
 		xb.buf = buf;
 		xb.size = sizeof(buf);
 		xb.rth = &rth;
 
+		if (rtnl_open(&rth2, 0) < 0)
+			exit(1);
+
 		for (i = 0; ; i++) {
 			xb.offset = 0;
 			xb.nlmsg_count = 0;
@@ -951,7 +955,7 @@
 				break;
 			}
 
-			if (rtnl_send_check(&rth, xb.buf, xb.offset) < 0) {
+			if (rtnl_send_check(&rth2, xb.buf, xb.offset) < 0) {
 				perror("Failed to send delete-all request\n");
 				exit(1);
 			}
@@ -962,6 +966,7 @@
 			xb.nlmsg_count = 0;
 		}
 
+		rtnl_close(&rth2);
 	} else {
 		if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
 			perror("Cannot send dump request");