Merge branch 'lvs-next-2.6' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/lvs-2.6
Conflicts:
net/netfilter/Kconfig
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 591ea23..691268f 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -630,5 +630,3 @@
If unsure, say N.
-source "net/ipv4/ipvs/Kconfig"
-
diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index ad40ef3..80ff87c 100644
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -33,7 +33,6 @@
obj-$(CONFIG_INET_XFRM_MODE_TUNNEL) += xfrm4_mode_tunnel.o
obj-$(CONFIG_IP_PNP) += ipconfig.o
obj-$(CONFIG_NETFILTER) += netfilter.o netfilter/
-obj-$(CONFIG_IP_VS) += ipvs/
obj-$(CONFIG_INET_DIAG) += inet_diag.o
obj-$(CONFIG_INET_TCP_DIAG) += tcp_diag.o
obj-$(CONFIG_NET_TCPPROBE) += tcp_probe.o
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index f70b414..78892cf 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -858,3 +858,5 @@
endif # NETFILTER_XTABLES
endmenu
+
+source "net/netfilter/ipvs/Kconfig"
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 8ce6766..da3d909 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -89,3 +89,6 @@
obj-$(CONFIG_NETFILTER_XT_MATCH_TCPMSS) += xt_tcpmss.o
obj-$(CONFIG_NETFILTER_XT_MATCH_TIME) += xt_time.o
obj-$(CONFIG_NETFILTER_XT_MATCH_U32) += xt_u32.o
+
+# IPVS
+obj-$(CONFIG_IP_VS) += ipvs/
diff --git a/net/ipv4/ipvs/Kconfig b/net/netfilter/ipvs/Kconfig
similarity index 100%
rename from net/ipv4/ipvs/Kconfig
rename to net/netfilter/ipvs/Kconfig
diff --git a/net/ipv4/ipvs/Makefile b/net/netfilter/ipvs/Makefile
similarity index 100%
rename from net/ipv4/ipvs/Makefile
rename to net/netfilter/ipvs/Makefile
diff --git a/net/ipv4/ipvs/ip_vs_app.c b/net/netfilter/ipvs/ip_vs_app.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_app.c
rename to net/netfilter/ipvs/ip_vs_app.c
diff --git a/net/ipv4/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_conn.c
rename to net/netfilter/ipvs/ip_vs_conn.c
diff --git a/net/ipv4/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_core.c
rename to net/netfilter/ipvs/ip_vs_core.c
diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
similarity index 99%
rename from net/ipv4/ipvs/ip_vs_ctl.c
rename to net/netfilter/ipvs/ip_vs_ctl.c
index 771551d..0302cf3 100644
--- a/net/ipv4/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -1330,7 +1330,9 @@
out_unlock:
write_unlock_bh(&__ip_vs_svc_lock);
+#ifdef CONFIG_IP_VS_IPV6
out:
+#endif
if (old_sched)
ip_vs_scheduler_put(old_sched);
diff --git a/net/netfilter/ipvs/ip_vs_dh.c b/net/netfilter/ipvs/ip_vs_dh.c
new file mode 100644
index 0000000..a16943f
--- /dev/null
+++ b/net/netfilter/ipvs/ip_vs_dh.c
@@ -0,0 +1,261 @@
+/*
+ * IPVS: Destination Hashing scheduling module
+ *
+ * Authors: Wensong Zhang <wensong@gnuchina.org>
+ *
+ * Inspired by the consistent hashing scheduler patch from
+ * Thomas Proell <proellt@gmx.de>
+ *
+ * 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:
+ *
+ */
+
+/*
+ * The dh algorithm is to select server by the hash key of destination IP
+ * address. The pseudo code is as follows:
+ *
+ * n <- servernode[dest_ip];
+ * if (n is dead) OR
+ * (n is overloaded) OR (n.weight <= 0) then
+ * return NULL;
+ *
+ * return n;
+ *
+ * Notes that servernode is a 256-bucket hash table that maps the hash
+ * index derived from packet destination IP address to the current server
+ * array. If the dh scheduler is used in cache cluster, it is good to
+ * combine it with cache_bypass feature. When the statically assigned
+ * server is dead or overloaded, the load balancer can bypass the cache
+ * server and send requests to the original server directly.
+ *
+ */
+
+#include <linux/ip.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+
+#include <net/ip_vs.h>
+
+
+/*
+ * IPVS DH bucket
+ */
+struct ip_vs_dh_bucket {
+ struct ip_vs_dest *dest; /* real server (cache) */
+};
+
+/*
+ * for IPVS DH entry hash table
+ */
+#ifndef CONFIG_IP_VS_DH_TAB_BITS
+#define CONFIG_IP_VS_DH_TAB_BITS 8
+#endif
+#define IP_VS_DH_TAB_BITS CONFIG_IP_VS_DH_TAB_BITS
+#define IP_VS_DH_TAB_SIZE (1 << IP_VS_DH_TAB_BITS)
+#define IP_VS_DH_TAB_MASK (IP_VS_DH_TAB_SIZE - 1)
+
+
+/*
+ * Returns hash value for IPVS DH entry
+ */
+static inline unsigned ip_vs_dh_hashkey(__be32 addr)
+{
+ return (ntohl(addr)*2654435761UL) & IP_VS_DH_TAB_MASK;
+}
+
+
+/*
+ * Get ip_vs_dest associated with supplied parameters.
+ */
+static inline struct ip_vs_dest *
+ip_vs_dh_get(struct ip_vs_dh_bucket *tbl, __be32 addr)
+{
+ return (tbl[ip_vs_dh_hashkey(addr)]).dest;
+}
+
+
+/*
+ * Assign all the hash buckets of the specified table with the service.
+ */
+static int
+ip_vs_dh_assign(struct ip_vs_dh_bucket *tbl, struct ip_vs_service *svc)
+{
+ int i;
+ struct ip_vs_dh_bucket *b;
+ struct list_head *p;
+ struct ip_vs_dest *dest;
+
+ b = tbl;
+ p = &svc->destinations;
+ for (i=0; i<IP_VS_DH_TAB_SIZE; i++) {
+ if (list_empty(p)) {
+ b->dest = NULL;
+ } else {
+ if (p == &svc->destinations)
+ p = p->next;
+
+ dest = list_entry(p, struct ip_vs_dest, n_list);
+ atomic_inc(&dest->refcnt);
+ b->dest = dest;
+
+ p = p->next;
+ }
+ b++;
+ }
+ return 0;
+}
+
+
+/*
+ * Flush all the hash buckets of the specified table.
+ */
+static void ip_vs_dh_flush(struct ip_vs_dh_bucket *tbl)
+{
+ int i;
+ struct ip_vs_dh_bucket *b;
+
+ b = tbl;
+ for (i=0; i<IP_VS_DH_TAB_SIZE; i++) {
+ if (b->dest) {
+ atomic_dec(&b->dest->refcnt);
+ b->dest = NULL;
+ }
+ b++;
+ }
+}
+
+
+static int ip_vs_dh_init_svc(struct ip_vs_service *svc)
+{
+ struct ip_vs_dh_bucket *tbl;
+
+ /* allocate the DH table for this service */
+ tbl = kmalloc(sizeof(struct ip_vs_dh_bucket)*IP_VS_DH_TAB_SIZE,
+ GFP_ATOMIC);
+ if (tbl == NULL) {
+ IP_VS_ERR("ip_vs_dh_init_svc(): no memory\n");
+ return -ENOMEM;
+ }
+ svc->sched_data = tbl;
+ IP_VS_DBG(6, "DH hash table (memory=%Zdbytes) allocated for "
+ "current service\n",
+ sizeof(struct ip_vs_dh_bucket)*IP_VS_DH_TAB_SIZE);
+
+ /* assign the hash buckets with the updated service */
+ ip_vs_dh_assign(tbl, svc);
+
+ return 0;
+}
+
+
+static int ip_vs_dh_done_svc(struct ip_vs_service *svc)
+{
+ struct ip_vs_dh_bucket *tbl = svc->sched_data;
+
+ /* got to clean up hash buckets here */
+ ip_vs_dh_flush(tbl);
+
+ /* release the table itself */
+ kfree(svc->sched_data);
+ IP_VS_DBG(6, "DH hash table (memory=%Zdbytes) released\n",
+ sizeof(struct ip_vs_dh_bucket)*IP_VS_DH_TAB_SIZE);
+
+ return 0;
+}
+
+
+static int ip_vs_dh_update_svc(struct ip_vs_service *svc)
+{
+ struct ip_vs_dh_bucket *tbl = svc->sched_data;
+
+ /* got to clean up hash buckets here */
+ ip_vs_dh_flush(tbl);
+
+ /* assign the hash buckets with the updated service */
+ ip_vs_dh_assign(tbl, svc);
+
+ return 0;
+}
+
+
+/*
+ * If the dest flags is set with IP_VS_DEST_F_OVERLOAD,
+ * consider that the server is overloaded here.
+ */
+static inline int is_overloaded(struct ip_vs_dest *dest)
+{
+ return dest->flags & IP_VS_DEST_F_OVERLOAD;
+}
+
+
+/*
+ * Destination hashing scheduling
+ */
+static struct ip_vs_dest *
+ip_vs_dh_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
+{
+ struct ip_vs_dest *dest;
+ struct ip_vs_dh_bucket *tbl;
+ struct iphdr *iph = ip_hdr(skb);
+
+ IP_VS_DBG(6, "ip_vs_dh_schedule(): Scheduling...\n");
+
+ tbl = (struct ip_vs_dh_bucket *)svc->sched_data;
+ dest = ip_vs_dh_get(tbl, iph->daddr);
+ if (!dest
+ || !(dest->flags & IP_VS_DEST_F_AVAILABLE)
+ || atomic_read(&dest->weight) <= 0
+ || is_overloaded(dest)) {
+ return NULL;
+ }
+
+ IP_VS_DBG(6, "DH: destination IP address %u.%u.%u.%u "
+ "--> server %u.%u.%u.%u:%d\n",
+ NIPQUAD(iph->daddr),
+ NIPQUAD(dest->addr.ip),
+ ntohs(dest->port));
+
+ return dest;
+}
+
+
+/*
+ * IPVS DH Scheduler structure
+ */
+static struct ip_vs_scheduler ip_vs_dh_scheduler =
+{
+ .name = "dh",
+ .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,
+ .schedule = ip_vs_dh_schedule,
+};
+
+
+static int __init ip_vs_dh_init(void)
+{
+ return register_ip_vs_scheduler(&ip_vs_dh_scheduler);
+}
+
+
+static void __exit ip_vs_dh_cleanup(void)
+{
+ unregister_ip_vs_scheduler(&ip_vs_dh_scheduler);
+}
+
+
+module_init(ip_vs_dh_init);
+module_exit(ip_vs_dh_cleanup);
+MODULE_LICENSE("GPL");
diff --git a/net/ipv4/ipvs/ip_vs_est.c b/net/netfilter/ipvs/ip_vs_est.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_est.c
rename to net/netfilter/ipvs/ip_vs_est.c
diff --git a/net/ipv4/ipvs/ip_vs_ftp.c b/net/netfilter/ipvs/ip_vs_ftp.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_ftp.c
rename to net/netfilter/ipvs/ip_vs_ftp.c
diff --git a/net/ipv4/ipvs/ip_vs_lblc.c b/net/netfilter/ipvs/ip_vs_lblc.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_lblc.c
rename to net/netfilter/ipvs/ip_vs_lblc.c
diff --git a/net/ipv4/ipvs/ip_vs_lblcr.c b/net/netfilter/ipvs/ip_vs_lblcr.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_lblcr.c
rename to net/netfilter/ipvs/ip_vs_lblcr.c
diff --git a/net/ipv4/ipvs/ip_vs_lc.c b/net/netfilter/ipvs/ip_vs_lc.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_lc.c
rename to net/netfilter/ipvs/ip_vs_lc.c
diff --git a/net/ipv4/ipvs/ip_vs_nq.c b/net/netfilter/ipvs/ip_vs_nq.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_nq.c
rename to net/netfilter/ipvs/ip_vs_nq.c
diff --git a/net/ipv4/ipvs/ip_vs_proto.c b/net/netfilter/ipvs/ip_vs_proto.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_proto.c
rename to net/netfilter/ipvs/ip_vs_proto.c
diff --git a/net/ipv4/ipvs/ip_vs_proto_ah_esp.c b/net/netfilter/ipvs/ip_vs_proto_ah_esp.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_proto_ah_esp.c
rename to net/netfilter/ipvs/ip_vs_proto_ah_esp.c
diff --git a/net/ipv4/ipvs/ip_vs_proto_tcp.c b/net/netfilter/ipvs/ip_vs_proto_tcp.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_proto_tcp.c
rename to net/netfilter/ipvs/ip_vs_proto_tcp.c
diff --git a/net/ipv4/ipvs/ip_vs_proto_udp.c b/net/netfilter/ipvs/ip_vs_proto_udp.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_proto_udp.c
rename to net/netfilter/ipvs/ip_vs_proto_udp.c
diff --git a/net/ipv4/ipvs/ip_vs_rr.c b/net/netfilter/ipvs/ip_vs_rr.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_rr.c
rename to net/netfilter/ipvs/ip_vs_rr.c
diff --git a/net/ipv4/ipvs/ip_vs_sched.c b/net/netfilter/ipvs/ip_vs_sched.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_sched.c
rename to net/netfilter/ipvs/ip_vs_sched.c
diff --git a/net/ipv4/ipvs/ip_vs_sed.c b/net/netfilter/ipvs/ip_vs_sed.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_sed.c
rename to net/netfilter/ipvs/ip_vs_sed.c
diff --git a/net/ipv4/ipvs/ip_vs_sh.c b/net/netfilter/ipvs/ip_vs_sh.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_sh.c
rename to net/netfilter/ipvs/ip_vs_sh.c
diff --git a/net/ipv4/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
similarity index 98%
rename from net/ipv4/ipvs/ip_vs_sync.c
rename to net/netfilter/ipvs/ip_vs_sync.c
index 28237a5..de5e7e1 100644
--- a/net/ipv4/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -30,6 +30,7 @@
#include <linux/err.h>
#include <linux/kthread.h>
#include <linux/wait.h>
+#include <linux/kernel.h>
#include <net/ip.h>
#include <net/sock.h>
@@ -99,6 +100,7 @@
*/
#define SYNC_MESG_HEADER_LEN 4
+#define MAX_CONNS_PER_SYNCBUFF 255 /* nr_conns in ip_vs_sync_mesg is 8 bit */
struct ip_vs_sync_mesg {
__u8 nr_conns;
@@ -516,8 +518,8 @@
num = (dev->mtu - sizeof(struct iphdr) -
sizeof(struct udphdr) -
SYNC_MESG_HEADER_LEN - 20) / SIMPLE_CONN_SIZE;
- sync_send_mesg_maxlen =
- SYNC_MESG_HEADER_LEN + SIMPLE_CONN_SIZE * num;
+ sync_send_mesg_maxlen = SYNC_MESG_HEADER_LEN +
+ SIMPLE_CONN_SIZE * min(num, MAX_CONNS_PER_SYNCBUFF);
IP_VS_DBG(7, "setting the maximum length of sync sending "
"message %d.\n", sync_send_mesg_maxlen);
} else if (sync_state == IP_VS_STATE_BACKUP) {
diff --git a/net/ipv4/ipvs/ip_vs_wlc.c b/net/netfilter/ipvs/ip_vs_wlc.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_wlc.c
rename to net/netfilter/ipvs/ip_vs_wlc.c
diff --git a/net/ipv4/ipvs/ip_vs_wrr.c b/net/netfilter/ipvs/ip_vs_wrr.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_wrr.c
rename to net/netfilter/ipvs/ip_vs_wrr.c
diff --git a/net/ipv4/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
similarity index 100%
rename from net/ipv4/ipvs/ip_vs_xmit.c
rename to net/netfilter/ipvs/ip_vs_xmit.c
