IPVS: Move IPVS to net/netfilter/ipvs

Since IPVS now has partial IPv6 support, this patch moves IPVS from
net/ipv4/ipvs to net/netfilter/ipvs. It's a result of:

$ git mv net/ipv4/ipvs net/netfilter

and adapting the relevant Kconfigs/Makefiles to the new path.

Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

1 files changed, 0 insertions, 237 deletions

diff --git a/net/ipv4/ipvs/ip_vs_wrr.c b/net/ipv4/ipvs/ip_vs_wrr.c
deleted file mode 100644
index 7ea92fe..0000000
--- a/net/ipv4/ipvs/ip_vs_wrr.c
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * IPVS:        Weighted Round-Robin Scheduling module
- *
- * Authors:     Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- *              This program is free software; you can redistribute it and/or
- *              modify it under the terms of the GNU General Public License
- *              as published by the Free Software Foundation; either version
- *              2 of the License, or (at your option) any later version.
- *
- * Changes:
- *     Wensong Zhang            :     changed the ip_vs_wrr_schedule to return dest
- *     Wensong Zhang            :     changed some comestics things for debugging
- *     Wensong Zhang            :     changed for the d-linked destination list
- *     Wensong Zhang            :     added the ip_vs_wrr_update_svc
- *     Julian Anastasov         :     fixed the bug of returning destination
- *                                    with weight 0 when all weights are zero
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/net.h>
-
-#include <net/ip_vs.h>
-
-/*
- * current destination pointer for weighted round-robin scheduling
- */
-struct ip_vs_wrr_mark {
-	struct list_head *cl;	/* current list head */
-	int cw;			/* current weight */
-	int mw;			/* maximum weight */
-	int di;			/* decreasing interval */
-};
-
-
-/*
- *    Get the gcd of server weights
- */
-static int gcd(int a, int b)
-{
-	int c;
-
-	while ((c = a % b)) {
-		a = b;
-		b = c;
-	}
-	return b;
-}
-
-static int ip_vs_wrr_gcd_weight(struct ip_vs_service *svc)
-{
-	struct ip_vs_dest *dest;
-	int weight;
-	int g = 0;
-
-	list_for_each_entry(dest, &svc->destinations, n_list) {
-		weight = atomic_read(&dest->weight);
-		if (weight > 0) {
-			if (g > 0)
-				g = gcd(weight, g);
-			else
-				g = weight;
-		}
-	}
-	return g ? g : 1;
-}
-
-
-/*
- *    Get the maximum weight of the service destinations.
- */
-static int ip_vs_wrr_max_weight(struct ip_vs_service *svc)
-{
-	struct ip_vs_dest *dest;
-	int weight = 0;
-
-	list_for_each_entry(dest, &svc->destinations, n_list) {
-		if (atomic_read(&dest->weight) > weight)
-			weight = atomic_read(&dest->weight);
-	}
-
-	return weight;
-}
-
-
-static int ip_vs_wrr_init_svc(struct ip_vs_service *svc)
-{
-	struct ip_vs_wrr_mark *mark;
-
-	/*
-	 *    Allocate the mark variable for WRR scheduling
-	 */
-	mark = kmalloc(sizeof(struct ip_vs_wrr_mark), GFP_ATOMIC);
-	if (mark == NULL) {
-		IP_VS_ERR("ip_vs_wrr_init_svc(): no memory\n");
-		return -ENOMEM;
-	}
-	mark->cl = &svc->destinations;
-	mark->cw = 0;
-	mark->mw = ip_vs_wrr_max_weight(svc);
-	mark->di = ip_vs_wrr_gcd_weight(svc);
-	svc->sched_data = mark;
-
-	return 0;
-}
-
-
-static int ip_vs_wrr_done_svc(struct ip_vs_service *svc)
-{
-	/*
-	 *    Release the mark variable
-	 */
-	kfree(svc->sched_data);
-
-	return 0;
-}
-
-
-static int ip_vs_wrr_update_svc(struct ip_vs_service *svc)
-{
-	struct ip_vs_wrr_mark *mark = svc->sched_data;
-
-	mark->cl = &svc->destinations;
-	mark->mw = ip_vs_wrr_max_weight(svc);
-	mark->di = ip_vs_wrr_gcd_weight(svc);
-	if (mark->cw > mark->mw)
-		mark->cw = 0;
-	return 0;
-}
-
-
-/*
- *    Weighted Round-Robin Scheduling
- */
-static struct ip_vs_dest *
-ip_vs_wrr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
-	struct ip_vs_dest *dest;
-	struct ip_vs_wrr_mark *mark = svc->sched_data;
-	struct list_head *p;
-
-	IP_VS_DBG(6, "ip_vs_wrr_schedule(): Scheduling...\n");
-
-	/*
-	 * This loop will always terminate, because mark->cw in (0, max_weight]
-	 * and at least one server has its weight equal to max_weight.
-	 */
-	write_lock(&svc->sched_lock);
-	p = mark->cl;
-	while (1) {
-		if (mark->cl == &svc->destinations) {
-			/* it is at the head of the destination list */
-
-			if (mark->cl == mark->cl->next) {
-				/* no dest entry */
-				dest = NULL;
-				goto out;
-			}
-
-			mark->cl = svc->destinations.next;
-			mark->cw -= mark->di;
-			if (mark->cw <= 0) {
-				mark->cw = mark->mw;
-				/*
-				 * Still zero, which means no available servers.
-				 */
-				if (mark->cw == 0) {
-					mark->cl = &svc->destinations;
-					IP_VS_ERR_RL("ip_vs_wrr_schedule(): "
-						   "no available servers\n");
-					dest = NULL;
-					goto out;
-				}
-			}
-		} else
-			mark->cl = mark->cl->next;
-
-		if (mark->cl != &svc->destinations) {
-			/* not at the head of the list */
-			dest = list_entry(mark->cl, struct ip_vs_dest, n_list);
-			if (!(dest->flags & IP_VS_DEST_F_OVERLOAD) &&
-			    atomic_read(&dest->weight) >= mark->cw) {
-				/* got it */
-				break;
-			}
-		}
-
-		if (mark->cl == p && mark->cw == mark->di) {
-			/* back to the start, and no dest is found.
-			   It is only possible when all dests are OVERLOADED */
-			dest = NULL;
-			goto out;
-		}
-	}
-
-	IP_VS_DBG_BUF(6, "WRR: server %s:%u "
-		      "activeconns %d refcnt %d weight %d\n",
-		      IP_VS_DBG_ADDR(svc->af, &dest->addr), ntohs(dest->port),
-		      atomic_read(&dest->activeconns),
-		      atomic_read(&dest->refcnt),
-		      atomic_read(&dest->weight));
-
-  out:
-	write_unlock(&svc->sched_lock);
-	return dest;
-}
-
-
-static struct ip_vs_scheduler ip_vs_wrr_scheduler = {
-	.name =			"wrr",
-	.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,
-	.schedule =		ip_vs_wrr_schedule,
-};
-
-static int __init ip_vs_wrr_init(void)
-{
-	return register_ip_vs_scheduler(&ip_vs_wrr_scheduler) ;
-}
-
-static void __exit ip_vs_wrr_cleanup(void)
-{
-	unregister_ip_vs_scheduler(&ip_vs_wrr_scheduler);
-}
-
-module_init(ip_vs_wrr_init);
-module_exit(ip_vs_wrr_cleanup);
-MODULE_LICENSE("GPL");