IPVS: Add IPv6 support flag to schedulers

Add 'supports_ipv6' flag to struct ip_vs_scheduler to indicate whether a
scheduler supports IPv6. Set the flag to 1 in schedulers that work with
IPv6, 0 otherwise. This flag is checked in a later patch while trying to
add a service with a specific scheduler. Adjust debug in v6-supporting
schedulers to work with both address families.
Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

include/net/ip_vs.h

@@ -516,6 +516,9 @@ struct ip_vs_scheduler {
 	char			*name;		/* scheduler name */
 	atomic_t		refcnt;		/* reference counter */
 	struct module		*module;	/* THIS_MODULE/NULL */
+#ifdef CONFIG_IP_VS_IPV6
+	int			supports_ipv6;	/* scheduler has IPv6 support */
+#endif
 
 	/* scheduler initializing service */
 	int (*init_service)(struct ip_vs_service *svc);

net/ipv4/ipvs/ip_vs_dh.c

@@ -234,6 +234,9 @@ static struct ip_vs_scheduler ip_vs_dh_scheduler =
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_dh_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	0,
+#endif
 	.init_service =		ip_vs_dh_init_svc,
 	.done_service =		ip_vs_dh_done_svc,
 	.update_service =	ip_vs_dh_update_svc,

net/ipv4/ipvs/ip_vs_lblc.c

@@ -522,6 +522,9 @@ static struct ip_vs_scheduler ip_vs_lblc_scheduler =
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_lblc_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	0,
+#endif
 	.init_service =		ip_vs_lblc_init_svc,
 	.done_service =		ip_vs_lblc_done_svc,
 	.schedule =		ip_vs_lblc_schedule,

net/ipv4/ipvs/ip_vs_lblcr.c

@@ -722,6 +722,9 @@ static struct ip_vs_scheduler ip_vs_lblcr_scheduler =
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_lblcr_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	0,
+#endif
 	.init_service =		ip_vs_lblcr_init_svc,
 	.done_service =		ip_vs_lblcr_done_svc,
 	.schedule =		ip_vs_lblcr_schedule,

net/ipv4/ipvs/ip_vs_lc.c

@@ -67,8 +67,8 @@ ip_vs_lc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
 	}
 
 	if (least)
-	IP_VS_DBG(6, "LC: server %u.%u.%u.%u:%u activeconns %d inactconns %d\n",
-		  NIPQUAD(least->addr.ip), ntohs(least->port),
+	IP_VS_DBG_BUF(6, "LC: server %s:%u activeconns %d inactconns %d\n",
+		      IP_VS_DBG_ADDR(svc->af, &least->addr), ntohs(least->port),
 		      atomic_read(&least->activeconns),
 		      atomic_read(&least->inactconns));
 
@@ -81,6 +81,9 @@ static struct ip_vs_scheduler ip_vs_lc_scheduler = {
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_lc_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	1,
+#endif
 	.schedule =		ip_vs_lc_schedule,
 };
 

net/ipv4/ipvs/ip_vs_nq.c

@@ -99,9 +99,9 @@ ip_vs_nq_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
 		return NULL;
 
   out:
-	IP_VS_DBG(6, "NQ: server %u.%u.%u.%u:%u "
+	IP_VS_DBG_BUF(6, "NQ: server %s:%u "
 		      "activeconns %d refcnt %d weight %d overhead %d\n",
-		  NIPQUAD(least->addr.ip), ntohs(least->port),
+		      IP_VS_DBG_ADDR(svc->af, &least->addr), ntohs(least->port),
 		      atomic_read(&least->activeconns),
 		      atomic_read(&least->refcnt),
 		      atomic_read(&least->weight), loh);
@@ -116,6 +116,9 @@ static struct ip_vs_scheduler ip_vs_nq_scheduler =
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_nq_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	1,
+#endif
 	.schedule =		ip_vs_nq_schedule,
 };
 

net/ipv4/ipvs/ip_vs_rr.c

@@ -74,9 +74,9 @@ ip_vs_rr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
   out:
 	svc->sched_data = q;
 	write_unlock(&svc->sched_lock);
-	IP_VS_DBG(6, "RR: server %u.%u.%u.%u:%u "
+	IP_VS_DBG_BUF(6, "RR: server %s:%u "
 		      "activeconns %d refcnt %d weight %d\n",
-		  NIPQUAD(dest->addr.ip), ntohs(dest->port),
+		      IP_VS_DBG_ADDR(svc->af, &dest->addr), ntohs(dest->port),
 		      atomic_read(&dest->activeconns),
 		      atomic_read(&dest->refcnt), atomic_read(&dest->weight));
 
@@ -89,6 +89,9 @@ static struct ip_vs_scheduler ip_vs_rr_scheduler = {
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_rr_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	1,
+#endif
 	.init_service =		ip_vs_rr_init_svc,
 	.update_service =	ip_vs_rr_update_svc,
 	.schedule =		ip_vs_rr_schedule,

net/ipv4/ipvs/ip_vs_sed.c

@@ -101,9 +101,9 @@ ip_vs_sed_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
 		}
 	}
 
-	IP_VS_DBG(6, "SED: server %u.%u.%u.%u:%u "
+	IP_VS_DBG_BUF(6, "SED: server %s:%u "
 		      "activeconns %d refcnt %d weight %d overhead %d\n",
-		  NIPQUAD(least->addr.ip), ntohs(least->port),
+		      IP_VS_DBG_ADDR(svc->af, &least->addr), ntohs(least->port),
 		      atomic_read(&least->activeconns),
 		      atomic_read(&least->refcnt),
 		      atomic_read(&least->weight), loh);
@@ -118,6 +118,9 @@ static struct ip_vs_scheduler ip_vs_sed_scheduler =
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_sed_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	1,
+#endif
 	.schedule =		ip_vs_sed_schedule,
 };
 

net/ipv4/ipvs/ip_vs_sh.c

@@ -231,6 +231,9 @@ static struct ip_vs_scheduler ip_vs_sh_scheduler =
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list	 =		LIST_HEAD_INIT(ip_vs_sh_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	0,
+#endif
 	.init_service =		ip_vs_sh_init_svc,
 	.done_service =		ip_vs_sh_done_svc,
 	.update_service =	ip_vs_sh_update_svc,

net/ipv4/ipvs/ip_vs_wlc.c

@@ -89,9 +89,9 @@ ip_vs_wlc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
 		}
 	}
 
-	IP_VS_DBG(6, "WLC: server %u.%u.%u.%u:%u "
+	IP_VS_DBG_BUF(6, "WLC: server %s:%u "
 		      "activeconns %d refcnt %d weight %d overhead %d\n",
-		  NIPQUAD(least->addr.ip), ntohs(least->port),
+		      IP_VS_DBG_ADDR(svc->af, &least->addr), ntohs(least->port),
 		      atomic_read(&least->activeconns),
 		      atomic_read(&least->refcnt),
 		      atomic_read(&least->weight), loh);
@@ -106,6 +106,9 @@ static struct ip_vs_scheduler ip_vs_wlc_scheduler =
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_wlc_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	1,
+#endif
 	.schedule =		ip_vs_wlc_schedule,
 };
 

net/ipv4/ipvs/ip_vs_wrr.c

@@ -195,9 +195,9 @@ ip_vs_wrr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
 		}
 	}
 
-	IP_VS_DBG(6, "WRR: server %u.%u.%u.%u:%u "
+	IP_VS_DBG_BUF(6, "WRR: server %s:%u "
 		      "activeconns %d refcnt %d weight %d\n",
-		  NIPQUAD(dest->addr.ip), ntohs(dest->port),
+		      IP_VS_DBG_ADDR(svc->af, &dest->addr), ntohs(dest->port),
 		      atomic_read(&dest->activeconns),
 		      atomic_read(&dest->refcnt),
 		      atomic_read(&dest->weight));
@@ -213,6 +213,9 @@ static struct ip_vs_scheduler ip_vs_wrr_scheduler = {
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_wrr_scheduler.n_list),
+#ifdef CONFIG_IP_VS_IPV6
+	.supports_ipv6 =	1,
+#endif
 	.init_service =		ip_vs_wrr_init_svc,
 	.done_service =		ip_vs_wrr_done_svc,
 	.update_service =	ip_vs_wrr_update_svc,