Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/lvs-2.6 into lvs-next-2.6

include/linux/ip_vs.h

···
 	int			syncid;
 };
 
+/*
+ *
+ * IPVS Generic Netlink interface definitions
+ *
+ */
+
+/* Generic Netlink family info */
+
+#define IPVS_GENL_NAME		"IPVS"
+#define IPVS_GENL_VERSION	0x1
+
+struct ip_vs_flags {
+	__be32 flags;
+	__be32 mask;
+};
+
+/* Generic Netlink command attributes */
+enum {
+	IPVS_CMD_UNSPEC = 0,
+
+	IPVS_CMD_NEW_SERVICE,		/* add service */
+	IPVS_CMD_SET_SERVICE,		/* modify service */
+	IPVS_CMD_DEL_SERVICE,		/* delete service */
+	IPVS_CMD_GET_SERVICE,		/* get service info */
+
+	IPVS_CMD_NEW_DEST,		/* add destination */
+	IPVS_CMD_SET_DEST,		/* modify destination */
+	IPVS_CMD_DEL_DEST,		/* delete destination */
+	IPVS_CMD_GET_DEST,		/* get destination info */
+
+	IPVS_CMD_NEW_DAEMON,		/* start sync daemon */
+	IPVS_CMD_DEL_DAEMON,		/* stop sync daemon */
+	IPVS_CMD_GET_DAEMON,		/* get sync daemon status */
+
+	IPVS_CMD_SET_CONFIG,		/* set config settings */
+	IPVS_CMD_GET_CONFIG,		/* get config settings */
+
+	IPVS_CMD_SET_INFO,		/* only used in GET_INFO reply */
+	IPVS_CMD_GET_INFO,		/* get general IPVS info */
+
+	IPVS_CMD_ZERO,			/* zero all counters and stats */
+	IPVS_CMD_FLUSH,			/* flush services and dests */
+
+	__IPVS_CMD_MAX,
+};
+
+#define IPVS_CMD_MAX (__IPVS_CMD_MAX - 1)
+
+/* Attributes used in the first level of commands */
+enum {
+	IPVS_CMD_ATTR_UNSPEC = 0,
+	IPVS_CMD_ATTR_SERVICE,		/* nested service attribute */
+	IPVS_CMD_ATTR_DEST,		/* nested destination attribute */
+	IPVS_CMD_ATTR_DAEMON,		/* nested sync daemon attribute */
+	IPVS_CMD_ATTR_TIMEOUT_TCP,	/* TCP connection timeout */
+	IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,	/* TCP FIN wait timeout */
+	IPVS_CMD_ATTR_TIMEOUT_UDP,	/* UDP timeout */
+	__IPVS_CMD_ATTR_MAX,
+};
+
+#define IPVS_CMD_ATTR_MAX (__IPVS_SVC_ATTR_MAX - 1)
+
+/*
+ * Attributes used to describe a service
+ *
+ * Used inside nested attribute IPVS_CMD_ATTR_SERVICE
+ */
+enum {
+	IPVS_SVC_ATTR_UNSPEC = 0,
+	IPVS_SVC_ATTR_AF,		/* address family */
+	IPVS_SVC_ATTR_PROTOCOL,		/* virtual service protocol */
+	IPVS_SVC_ATTR_ADDR,		/* virtual service address */
+	IPVS_SVC_ATTR_PORT,		/* virtual service port */
+	IPVS_SVC_ATTR_FWMARK,		/* firewall mark of service */
+
+	IPVS_SVC_ATTR_SCHED_NAME,	/* name of scheduler */
+	IPVS_SVC_ATTR_FLAGS,		/* virtual service flags */
+	IPVS_SVC_ATTR_TIMEOUT,		/* persistent timeout */
+	IPVS_SVC_ATTR_NETMASK,		/* persistent netmask */
+
+	IPVS_SVC_ATTR_STATS,		/* nested attribute for service stats */
+	__IPVS_SVC_ATTR_MAX,
+};
+
+#define IPVS_SVC_ATTR_MAX (__IPVS_SVC_ATTR_MAX - 1)
+
+/*
+ * Attributes used to describe a destination (real server)
+ *
+ * Used inside nested attribute IPVS_CMD_ATTR_DEST
+ */
+enum {
+	IPVS_DEST_ATTR_UNSPEC = 0,
+	IPVS_DEST_ATTR_ADDR,		/* real server address */
+	IPVS_DEST_ATTR_PORT,		/* real server port */
+
+	IPVS_DEST_ATTR_FWD_METHOD,	/* forwarding method */
+	IPVS_DEST_ATTR_WEIGHT,		/* destination weight */
+
+	IPVS_DEST_ATTR_U_THRESH,	/* upper threshold */
+	IPVS_DEST_ATTR_L_THRESH,	/* lower threshold */
+
+	IPVS_DEST_ATTR_ACTIVE_CONNS,	/* active connections */
+	IPVS_DEST_ATTR_INACT_CONNS,	/* inactive connections */
+	IPVS_DEST_ATTR_PERSIST_CONNS,	/* persistent connections */
+
+	IPVS_DEST_ATTR_STATS,		/* nested attribute for dest stats */
+	__IPVS_DEST_ATTR_MAX,
+};
+
+#define IPVS_DEST_ATTR_MAX (__IPVS_DEST_ATTR_MAX - 1)
+
+/*
+ * Attributes describing a sync daemon
+ *
+ * Used inside nested attribute IPVS_CMD_ATTR_DAEMON
+ */
+enum {
+	IPVS_DAEMON_ATTR_UNSPEC = 0,
+	IPVS_DAEMON_ATTR_STATE,		/* sync daemon state (master/backup) */
+	IPVS_DAEMON_ATTR_MCAST_IFN,	/* multicast interface name */
+	IPVS_DAEMON_ATTR_SYNC_ID,	/* SyncID we belong to */
+	__IPVS_DAEMON_ATTR_MAX,
+};
+
+#define IPVS_DAEMON_ATTR_MAX (__IPVS_DAEMON_ATTR_MAX - 1)
+
+/*
+ * Attributes used to describe service or destination entry statistics
+ *
+ * Used inside nested attributes IPVS_SVC_ATTR_STATS and IPVS_DEST_ATTR_STATS
+ */
+enum {
+	IPVS_STATS_ATTR_UNSPEC = 0,
+	IPVS_STATS_ATTR_CONNS,		/* connections scheduled */
+	IPVS_STATS_ATTR_INPKTS,		/* incoming packets */
+	IPVS_STATS_ATTR_OUTPKTS,	/* outgoing packets */
+	IPVS_STATS_ATTR_INBYTES,	/* incoming bytes */
+	IPVS_STATS_ATTR_OUTBYTES,	/* outgoing bytes */
+
+	IPVS_STATS_ATTR_CPS,		/* current connection rate */
+	IPVS_STATS_ATTR_INPPS,		/* current in packet rate */
+	IPVS_STATS_ATTR_OUTPPS,		/* current out packet rate */
+	IPVS_STATS_ATTR_INBPS,		/* current in byte rate */
+	IPVS_STATS_ATTR_OUTBPS,		/* current out byte rate */
+	__IPVS_STATS_ATTR_MAX,
+};
+
+#define IPVS_STATS_ATTR_MAX (__IPVS_STATS_ATTR_MAX - 1)
+
+/* Attributes used in response to IPVS_CMD_GET_INFO command */
+enum {
+	IPVS_INFO_ATTR_UNSPEC = 0,
+	IPVS_INFO_ATTR_VERSION,		/* IPVS version number */
+	IPVS_INFO_ATTR_CONN_TAB_SIZE,	/* size of connection hash table */
+	__IPVS_INFO_ATTR_MAX,
+};
+
+#define IPVS_INFO_ATTR_MAX (__IPVS_INFO_ATTR_MAX - 1)
+
 #endif	/* _IP_VS_H */

include/net/ip_vs.h

···
 /*
  *      IPVS rate estimator prototypes (from ip_vs_est.c)
  */
+extern int ip_vs_estimator_init(void);
+extern void ip_vs_estimator_cleanup(void);
 extern void ip_vs_new_estimator(struct ip_vs_stats *stats);
 extern void ip_vs_kill_estimator(struct ip_vs_stats *stats);
 extern void ip_vs_zero_estimator(struct ip_vs_stats *stats);

net/ipv4/ipvs/Kconfig

···
 	  This option enables support for load balancing UDP transport
 	  protocol. Say Y if unsure.
 
+config	IP_VS_PROTO_AH_ESP
+	bool
+	depends on UNDEFINED
+
 config	IP_VS_PROTO_ESP
 	bool "ESP load balancing support"
+	select IP_VS_PROTO_AH_ESP
 	---help---
 	  This option enables support for load balancing ESP (Encapsulation
 	  Security Payload) transport protocol. Say Y if unsure.
 
 config	IP_VS_PROTO_AH
 	bool "AH load balancing support"
+	select IP_VS_PROTO_AH_ESP
 	---help---
 	  This option enables support for load balancing AH (Authentication
 	  Header) transport protocol. Say Y if unsure.

net/ipv4/ipvs/Makefile

···
 ip_vs_proto-objs-y :=
 ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_TCP) += ip_vs_proto_tcp.o
 ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_UDP) += ip_vs_proto_udp.o
-ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_ESP) += ip_vs_proto_esp.o
-ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_AH) += ip_vs_proto_ah.o
+ip_vs_proto-objs-$(CONFIG_IP_VS_PROTO_AH_ESP) += ip_vs_proto_ah_esp.o
 
 ip_vs-objs :=	ip_vs_conn.o ip_vs_core.o ip_vs_ctl.o ip_vs_sched.o	   \
 		ip_vs_xmit.o ip_vs_app.o ip_vs_sync.o	   		   \

net/ipv4/ipvs/ip_vs_core.c

···
 {
 	int ret;
 
+	ip_vs_estimator_init();
+
 	ret = ip_vs_control_init();
 	if (ret < 0) {
 		IP_VS_ERR("can't setup control.\n");
-		goto cleanup_nothing;
+		goto cleanup_estimator;
 	}
 
 	ip_vs_protocol_init();
···
   cleanup_protocol:
 	ip_vs_protocol_cleanup();
 	ip_vs_control_cleanup();
-  cleanup_nothing:
+  cleanup_estimator:
+	ip_vs_estimator_cleanup();
 	return ret;
 }
 
···
 	ip_vs_app_cleanup();
 	ip_vs_protocol_cleanup();
 	ip_vs_control_cleanup();
+	ip_vs_estimator_cleanup();
 	IP_VS_INFO("ipvs unloaded.\n");
 }
 

net/ipv4/ipvs/ip_vs_ctl.c

···
 #include <net/ip.h>
 #include <net/route.h>
 #include <net/sock.h>
+#include <net/genetlink.h>
 
 #include <asm/uaccess.h>
 
···
 		svc->num_dests++;
 
 		/* call the update_service function of its scheduler */
-		svc->scheduler->update_service(svc);
+		if (svc->scheduler->update_service)
+			svc->scheduler->update_service(svc);
 
 		write_unlock_bh(&__ip_vs_svc_lock);
 		return 0;
···
 	svc->num_dests++;
 
 	/* call the update_service function of its scheduler */
-	svc->scheduler->update_service(svc);
+	if (svc->scheduler->update_service)
+		svc->scheduler->update_service(svc);
 
 	write_unlock_bh(&__ip_vs_svc_lock);
 
···
 	IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
 
 	/* call the update_service, because server weight may be changed */
-	svc->scheduler->update_service(svc);
+	if (svc->scheduler->update_service)
+		svc->scheduler->update_service(svc);
 
 	write_unlock_bh(&__ip_vs_svc_lock);
 
···
 	 */
 	list_del(&dest->n_list);
 	svc->num_dests--;
-	if (svcupd) {
-		/*
-		 *  Call the update_service function of its scheduler
-		 */
-		svc->scheduler->update_service(svc);
-	}
+
+	/*
+	 *  Call the update_service function of its scheduler
+	 */
+	if (svcupd && svc->scheduler->update_service)
+			svc->scheduler->update_service(svc);
 }
 
 
···
 	.owner		= THIS_MODULE,
 };
 
+/*
+ * Generic Netlink interface
+ */
+
+/* IPVS genetlink family */
+static struct genl_family ip_vs_genl_family = {
+	.id		= GENL_ID_GENERATE,
+	.hdrsize	= 0,
+	.name		= IPVS_GENL_NAME,
+	.version	= IPVS_GENL_VERSION,
+	.maxattr	= IPVS_CMD_MAX,
+};
+
+/* Policy used for first-level command attributes */
+static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
+	[IPVS_CMD_ATTR_SERVICE]		= { .type = NLA_NESTED },
+	[IPVS_CMD_ATTR_DEST]		= { .type = NLA_NESTED },
+	[IPVS_CMD_ATTR_DAEMON]		= { .type = NLA_NESTED },
+	[IPVS_CMD_ATTR_TIMEOUT_TCP]	= { .type = NLA_U32 },
+	[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]	= { .type = NLA_U32 },
+	[IPVS_CMD_ATTR_TIMEOUT_UDP]	= { .type = NLA_U32 },
+};
+
+/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
+static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
+	[IPVS_DAEMON_ATTR_STATE]	= { .type = NLA_U32 },
+	[IPVS_DAEMON_ATTR_MCAST_IFN]	= { .type = NLA_NUL_STRING,
+					    .len = IP_VS_IFNAME_MAXLEN },
+	[IPVS_DAEMON_ATTR_SYNC_ID]	= { .type = NLA_U32 },
+};
+
+/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
+static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
+	[IPVS_SVC_ATTR_AF]		= { .type = NLA_U16 },
+	[IPVS_SVC_ATTR_PROTOCOL]	= { .type = NLA_U16 },
+	[IPVS_SVC_ATTR_ADDR]		= { .type = NLA_BINARY,
+					    .len = sizeof(union nf_inet_addr) },
+	[IPVS_SVC_ATTR_PORT]		= { .type = NLA_U16 },
+	[IPVS_SVC_ATTR_FWMARK]		= { .type = NLA_U32 },
+	[IPVS_SVC_ATTR_SCHED_NAME]	= { .type = NLA_NUL_STRING,
+					    .len = IP_VS_SCHEDNAME_MAXLEN },
+	[IPVS_SVC_ATTR_FLAGS]		= { .type = NLA_BINARY,
+					    .len = sizeof(struct ip_vs_flags) },
+	[IPVS_SVC_ATTR_TIMEOUT]		= { .type = NLA_U32 },
+	[IPVS_SVC_ATTR_NETMASK]		= { .type = NLA_U32 },
+	[IPVS_SVC_ATTR_STATS]		= { .type = NLA_NESTED },
+};
+
+/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
+static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
+	[IPVS_DEST_ATTR_ADDR]		= { .type = NLA_BINARY,
+					    .len = sizeof(union nf_inet_addr) },
+	[IPVS_DEST_ATTR_PORT]		= { .type = NLA_U16 },
+	[IPVS_DEST_ATTR_FWD_METHOD]	= { .type = NLA_U32 },
+	[IPVS_DEST_ATTR_WEIGHT]		= { .type = NLA_U32 },
+	[IPVS_DEST_ATTR_U_THRESH]	= { .type = NLA_U32 },
+	[IPVS_DEST_ATTR_L_THRESH]	= { .type = NLA_U32 },
+	[IPVS_DEST_ATTR_ACTIVE_CONNS]	= { .type = NLA_U32 },
+	[IPVS_DEST_ATTR_INACT_CONNS]	= { .type = NLA_U32 },
+	[IPVS_DEST_ATTR_PERSIST_CONNS]	= { .type = NLA_U32 },
+	[IPVS_DEST_ATTR_STATS]		= { .type = NLA_NESTED },
+};
+
+static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
+				 struct ip_vs_stats *stats)
+{
+	struct nlattr *nl_stats = nla_nest_start(skb, container_type);
+	if (!nl_stats)
+		return -EMSGSIZE;
+
+	spin_lock_bh(&stats->lock);
+
+	NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->conns);
+	NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->inpkts);
+	NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->outpkts);
+	NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->inbytes);
+	NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->outbytes);
+	NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->cps);
+	NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->inpps);
+	NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->outpps);
+	NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->inbps);
+	NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->outbps);
+
+	spin_unlock_bh(&stats->lock);
+
+	nla_nest_end(skb, nl_stats);
+
+	return 0;
+
+nla_put_failure:
+	spin_unlock_bh(&stats->lock);
+	nla_nest_cancel(skb, nl_stats);
+	return -EMSGSIZE;
+}
+
+static int ip_vs_genl_fill_service(struct sk_buff *skb,
+				   struct ip_vs_service *svc)
+{
+	struct nlattr *nl_service;
+	struct ip_vs_flags flags = { .flags = svc->flags,
+				     .mask = ~0 };
+
+	nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
+	if (!nl_service)
+		return -EMSGSIZE;
+
+	NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, AF_INET);
+
+	if (svc->fwmark) {
+		NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark);
+	} else {
+		NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol);
+		NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr);
+		NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port);
+	}
+
+	NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name);
+	NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags);
+	NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ);
+	NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask);
+
+	if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
+		goto nla_put_failure;
+
+	nla_nest_end(skb, nl_service);
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nl_service);
+	return -EMSGSIZE;
+}
+
+static int ip_vs_genl_dump_service(struct sk_buff *skb,
+				   struct ip_vs_service *svc,
+				   struct netlink_callback *cb)
+{
+	void *hdr;
+
+	hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
+			  &ip_vs_genl_family, NLM_F_MULTI,
+			  IPVS_CMD_NEW_SERVICE);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (ip_vs_genl_fill_service(skb, svc) < 0)
+		goto nla_put_failure;
+
+	return genlmsg_end(skb, hdr);
+
+nla_put_failure:
+	genlmsg_cancel(skb, hdr);
+	return -EMSGSIZE;
+}
+
+static int ip_vs_genl_dump_services(struct sk_buff *skb,
+				    struct netlink_callback *cb)
+{
+	int idx = 0, i;
+	int start = cb->args[0];
+	struct ip_vs_service *svc;
+
+	mutex_lock(&__ip_vs_mutex);
+	for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
+		list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
+			if (++idx <= start)
+				continue;
+			if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
+				idx--;
+				goto nla_put_failure;
+			}
+		}
+	}
+
+	for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
+		list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
+			if (++idx <= start)
+				continue;
+			if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
+				idx--;
+				goto nla_put_failure;
+			}
+		}
+	}
+
+nla_put_failure:
+	mutex_unlock(&__ip_vs_mutex);
+	cb->args[0] = idx;
+
+	return skb->len;
+}
+
+static int ip_vs_genl_parse_service(struct ip_vs_service_user *usvc,
+				    struct nlattr *nla, int full_entry)
+{
+	struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
+	struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
+
+	/* Parse mandatory identifying service fields first */
+	if (nla == NULL ||
+	    nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
+		return -EINVAL;
+
+	nla_af		= attrs[IPVS_SVC_ATTR_AF];
+	nla_protocol	= attrs[IPVS_SVC_ATTR_PROTOCOL];
+	nla_addr	= attrs[IPVS_SVC_ATTR_ADDR];
+	nla_port	= attrs[IPVS_SVC_ATTR_PORT];
+	nla_fwmark	= attrs[IPVS_SVC_ATTR_FWMARK];
+
+	if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
+		return -EINVAL;
+
+	/* For now, only support IPv4 */
+	if (nla_get_u16(nla_af) != AF_INET)
+		return -EAFNOSUPPORT;
+
+	if (nla_fwmark) {
+		usvc->protocol = IPPROTO_TCP;
+		usvc->fwmark = nla_get_u32(nla_fwmark);
+	} else {
+		usvc->protocol = nla_get_u16(nla_protocol);
+		nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
+		usvc->port = nla_get_u16(nla_port);
+		usvc->fwmark = 0;
+	}
+
+	/* If a full entry was requested, check for the additional fields */
+	if (full_entry) {
+		struct nlattr *nla_sched, *nla_flags, *nla_timeout,
+			      *nla_netmask;
+		struct ip_vs_flags flags;
+		struct ip_vs_service *svc;
+
+		nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
+		nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
+		nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
+		nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
+
+		if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
+			return -EINVAL;
+
+		nla_memcpy(&flags, nla_flags, sizeof(flags));
+
+		/* prefill flags from service if it already exists */
+		if (usvc->fwmark)
+			svc = __ip_vs_svc_fwm_get(usvc->fwmark);
+		else
+			svc = __ip_vs_service_get(usvc->protocol, usvc->addr,
+						  usvc->port);
+		if (svc) {
+			usvc->flags = svc->flags;
+			ip_vs_service_put(svc);
+		} else
+			usvc->flags = 0;
+
+		/* set new flags from userland */
+		usvc->flags = (usvc->flags & ~flags.mask) |
+			      (flags.flags & flags.mask);
+
+		strlcpy(usvc->sched_name, nla_data(nla_sched),
+			sizeof(usvc->sched_name));
+		usvc->timeout = nla_get_u32(nla_timeout);
+		usvc->netmask = nla_get_u32(nla_netmask);
+	}
+
+	return 0;
+}
+
+static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla)
+{
+	struct ip_vs_service_user usvc;
+	int ret;
+
+	ret = ip_vs_genl_parse_service(&usvc, nla, 0);
+	if (ret)
+		return ERR_PTR(ret);
+
+	if (usvc.fwmark)
+		return __ip_vs_svc_fwm_get(usvc.fwmark);
+	else
+		return __ip_vs_service_get(usvc.protocol, usvc.addr,
+					   usvc.port);
+}
+
+static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
+{
+	struct nlattr *nl_dest;
+
+	nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
+	if (!nl_dest)
+		return -EMSGSIZE;
+
+	NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr);
+	NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port);
+
+	NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD,
+		    atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK);
+	NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight));
+	NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold);
+	NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold);
+	NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
+		    atomic_read(&dest->activeconns));
+	NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS,
+		    atomic_read(&dest->inactconns));
+	NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
+		    atomic_read(&dest->persistconns));
+
+	if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
+		goto nla_put_failure;
+
+	nla_nest_end(skb, nl_dest);
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nl_dest);
+	return -EMSGSIZE;
+}
+
+static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
+				struct netlink_callback *cb)
+{
+	void *hdr;
+
+	hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
+			  &ip_vs_genl_family, NLM_F_MULTI,
+			  IPVS_CMD_NEW_DEST);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (ip_vs_genl_fill_dest(skb, dest) < 0)
+		goto nla_put_failure;
+
+	return genlmsg_end(skb, hdr);
+
+nla_put_failure:
+	genlmsg_cancel(skb, hdr);
+	return -EMSGSIZE;
+}
+
+static int ip_vs_genl_dump_dests(struct sk_buff *skb,
+				 struct netlink_callback *cb)
+{
+	int idx = 0;
+	int start = cb->args[0];
+	struct ip_vs_service *svc;
+	struct ip_vs_dest *dest;
+	struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
+
+	mutex_lock(&__ip_vs_mutex);
+
+	/* Try to find the service for which to dump destinations */
+	if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
+			IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
+		goto out_err;
+
+	svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]);
+	if (IS_ERR(svc) || svc == NULL)
+		goto out_err;
+
+	/* Dump the destinations */
+	list_for_each_entry(dest, &svc->destinations, n_list) {
+		if (++idx <= start)
+			continue;
+		if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
+			idx--;
+			goto nla_put_failure;
+		}
+	}
+
+nla_put_failure:
+	cb->args[0] = idx;
+	ip_vs_service_put(svc);
+
+out_err:
+	mutex_unlock(&__ip_vs_mutex);
+
+	return skb->len;
+}
+
+static int ip_vs_genl_parse_dest(struct ip_vs_dest_user *udest,
+				 struct nlattr *nla, int full_entry)
+{
+	struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
+	struct nlattr *nla_addr, *nla_port;
+
+	/* Parse mandatory identifying destination fields first */
+	if (nla == NULL ||
+	    nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
+		return -EINVAL;
+
+	nla_addr	= attrs[IPVS_DEST_ATTR_ADDR];
+	nla_port	= attrs[IPVS_DEST_ATTR_PORT];
+
+	if (!(nla_addr && nla_port))
+		return -EINVAL;
+
+	nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
+	udest->port = nla_get_u16(nla_port);
+
+	/* If a full entry was requested, check for the additional fields */
+	if (full_entry) {
+		struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
+			      *nla_l_thresh;
+
+		nla_fwd		= attrs[IPVS_DEST_ATTR_FWD_METHOD];
+		nla_weight	= attrs[IPVS_DEST_ATTR_WEIGHT];
+		nla_u_thresh	= attrs[IPVS_DEST_ATTR_U_THRESH];
+		nla_l_thresh	= attrs[IPVS_DEST_ATTR_L_THRESH];
+
+		if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
+			return -EINVAL;
+
+		udest->conn_flags = nla_get_u32(nla_fwd)
+				    & IP_VS_CONN_F_FWD_MASK;
+		udest->weight = nla_get_u32(nla_weight);
+		udest->u_threshold = nla_get_u32(nla_u_thresh);
+		udest->l_threshold = nla_get_u32(nla_l_thresh);
+	}
+
+	return 0;
+}
+
+static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state,
+				  const char *mcast_ifn, __be32 syncid)
+{
+	struct nlattr *nl_daemon;
+
+	nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
+	if (!nl_daemon)
+		return -EMSGSIZE;
+
+	NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state);
+	NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn);
+	NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid);
+
+	nla_nest_end(skb, nl_daemon);
+
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nl_daemon);
+	return -EMSGSIZE;
+}
+
+static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state,
+				  const char *mcast_ifn, __be32 syncid,
+				  struct netlink_callback *cb)
+{
+	void *hdr;
+	hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
+			  &ip_vs_genl_family, NLM_F_MULTI,
+			  IPVS_CMD_NEW_DAEMON);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
+		goto nla_put_failure;
+
+	return genlmsg_end(skb, hdr);
+
+nla_put_failure:
+	genlmsg_cancel(skb, hdr);
+	return -EMSGSIZE;
+}
+
+static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
+				   struct netlink_callback *cb)
+{
+	mutex_lock(&__ip_vs_mutex);
+	if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
+		if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
+					   ip_vs_master_mcast_ifn,
+					   ip_vs_master_syncid, cb) < 0)
+			goto nla_put_failure;
+
+		cb->args[0] = 1;
+	}
+
+	if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
+		if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
+					   ip_vs_backup_mcast_ifn,
+					   ip_vs_backup_syncid, cb) < 0)
+			goto nla_put_failure;
+
+		cb->args[1] = 1;
+	}
+
+nla_put_failure:
+	mutex_unlock(&__ip_vs_mutex);
+
+	return skb->len;
+}
+
+static int ip_vs_genl_new_daemon(struct nlattr **attrs)
+{
+	if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
+	      attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
+	      attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
+		return -EINVAL;
+
+	return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
+				 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
+				 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
+}
+
+static int ip_vs_genl_del_daemon(struct nlattr **attrs)
+{
+	if (!attrs[IPVS_DAEMON_ATTR_STATE])
+		return -EINVAL;
+
+	return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
+}
+
+static int ip_vs_genl_set_config(struct nlattr **attrs)
+{
+	struct ip_vs_timeout_user t;
+
+	__ip_vs_get_timeouts(&t);
+
+	if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
+		t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
+
+	if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
+		t.tcp_fin_timeout =
+			nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
+
+	if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
+		t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
+
+	return ip_vs_set_timeout(&t);
+}
+
+static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
+{
+	struct ip_vs_service *svc = NULL;
+	struct ip_vs_service_user usvc;
+	struct ip_vs_dest_user udest;
+	int ret = 0, cmd;
+	int need_full_svc = 0, need_full_dest = 0;
+
+	cmd = info->genlhdr->cmd;
+
+	mutex_lock(&__ip_vs_mutex);
+
+	if (cmd == IPVS_CMD_FLUSH) {
+		ret = ip_vs_flush();
+		goto out;
+	} else if (cmd == IPVS_CMD_SET_CONFIG) {
+		ret = ip_vs_genl_set_config(info->attrs);
+		goto out;
+	} else if (cmd == IPVS_CMD_NEW_DAEMON ||
+		   cmd == IPVS_CMD_DEL_DAEMON) {
+
+		struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
+
+		if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
+		    nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
+				     info->attrs[IPVS_CMD_ATTR_DAEMON],
+				     ip_vs_daemon_policy)) {
+			ret = -EINVAL;
+			goto out;
+		}
+
+		if (cmd == IPVS_CMD_NEW_DAEMON)
+			ret = ip_vs_genl_new_daemon(daemon_attrs);
+		else
+			ret = ip_vs_genl_del_daemon(daemon_attrs);
+		goto out;
+	} else if (cmd == IPVS_CMD_ZERO &&
+		   !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
+		ret = ip_vs_zero_all();
+		goto out;
+	}
+
+	/* All following commands require a service argument, so check if we
+	 * received a valid one. We need a full service specification when
+	 * adding / editing a service. Only identifying members otherwise. */
+	if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
+		need_full_svc = 1;
+
+	ret = ip_vs_genl_parse_service(&usvc,
+				       info->attrs[IPVS_CMD_ATTR_SERVICE],
+				       need_full_svc);
+	if (ret)
+		goto out;
+
+	/* Lookup the exact service by <protocol, addr, port> or fwmark */
+	if (usvc.fwmark == 0)
+		svc = __ip_vs_service_get(usvc.protocol, usvc.addr, usvc.port);
+	else
+		svc = __ip_vs_svc_fwm_get(usvc.fwmark);
+
+	/* Unless we're adding a new service, the service must already exist */
+	if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
+		ret = -ESRCH;
+		goto out;
+	}
+
+	/* Destination commands require a valid destination argument. For
+	 * adding / editing a destination, we need a full destination
+	 * specification. */
+	if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
+	    cmd == IPVS_CMD_DEL_DEST) {
+		if (cmd != IPVS_CMD_DEL_DEST)
+			need_full_dest = 1;
+
+		ret = ip_vs_genl_parse_dest(&udest,
+					    info->attrs[IPVS_CMD_ATTR_DEST],
+					    need_full_dest);
+		if (ret)
+			goto out;
+	}
+
+	switch (cmd) {
+	case IPVS_CMD_NEW_SERVICE:
+		if (svc == NULL)
+			ret = ip_vs_add_service(&usvc, &svc);
+		else
+			ret = -EEXIST;
+		break;
+	case IPVS_CMD_SET_SERVICE:
+		ret = ip_vs_edit_service(svc, &usvc);
+		break;
+	case IPVS_CMD_DEL_SERVICE:
+		ret = ip_vs_del_service(svc);
+		break;
+	case IPVS_CMD_NEW_DEST:
+		ret = ip_vs_add_dest(svc, &udest);
+		break;
+	case IPVS_CMD_SET_DEST:
+		ret = ip_vs_edit_dest(svc, &udest);
+		break;
+	case IPVS_CMD_DEL_DEST:
+		ret = ip_vs_del_dest(svc, &udest);
+		break;
+	case IPVS_CMD_ZERO:
+		ret = ip_vs_zero_service(svc);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+out:
+	if (svc)
+		ip_vs_service_put(svc);
+	mutex_unlock(&__ip_vs_mutex);
+
+	return ret;
+}
+
+static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
+{
+	struct sk_buff *msg;
+	void *reply;
+	int ret, cmd, reply_cmd;
+
+	cmd = info->genlhdr->cmd;
+
+	if (cmd == IPVS_CMD_GET_SERVICE)
+		reply_cmd = IPVS_CMD_NEW_SERVICE;
+	else if (cmd == IPVS_CMD_GET_INFO)
+		reply_cmd = IPVS_CMD_SET_INFO;
+	else if (cmd == IPVS_CMD_GET_CONFIG)
+		reply_cmd = IPVS_CMD_SET_CONFIG;
+	else {
+		IP_VS_ERR("unknown Generic Netlink command\n");
+		return -EINVAL;
+	}
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	mutex_lock(&__ip_vs_mutex);
+
+	reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
+	if (reply == NULL)
+		goto nla_put_failure;
+
+	switch (cmd) {
+	case IPVS_CMD_GET_SERVICE:
+	{
+		struct ip_vs_service *svc;
+
+		svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]);
+		if (IS_ERR(svc)) {
+			ret = PTR_ERR(svc);
+			goto out_err;
+		} else if (svc) {
+			ret = ip_vs_genl_fill_service(msg, svc);
+			ip_vs_service_put(svc);
+			if (ret)
+				goto nla_put_failure;
+		} else {
+			ret = -ESRCH;
+			goto out_err;
+		}
+
+		break;
+	}
+
+	case IPVS_CMD_GET_CONFIG:
+	{
+		struct ip_vs_timeout_user t;
+
+		__ip_vs_get_timeouts(&t);
+#ifdef CONFIG_IP_VS_PROTO_TCP
+		NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout);
+		NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
+			    t.tcp_fin_timeout);
+#endif
+#ifdef CONFIG_IP_VS_PROTO_UDP
+		NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout);
+#endif
+
+		break;
+	}
+
+	case IPVS_CMD_GET_INFO:
+		NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE);
+		NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
+			    IP_VS_CONN_TAB_SIZE);
+		break;
+	}
+
+	genlmsg_end(msg, reply);
+	ret = genlmsg_unicast(msg, info->snd_pid);
+	goto out;
+
+nla_put_failure:
+	IP_VS_ERR("not enough space in Netlink message\n");
+	ret = -EMSGSIZE;
+
+out_err:
+	nlmsg_free(msg);
+out:
+	mutex_unlock(&__ip_vs_mutex);
+
+	return ret;
+}
+
+
+static struct genl_ops ip_vs_genl_ops[] __read_mostly = {
+	{
+		.cmd	= IPVS_CMD_NEW_SERVICE,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_SET_SERVICE,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_DEL_SERVICE,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_GET_SERVICE,
+		.flags	= GENL_ADMIN_PERM,
+		.doit	= ip_vs_genl_get_cmd,
+		.dumpit	= ip_vs_genl_dump_services,
+		.policy	= ip_vs_cmd_policy,
+	},
+	{
+		.cmd	= IPVS_CMD_NEW_DEST,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_SET_DEST,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_DEL_DEST,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_GET_DEST,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.dumpit	= ip_vs_genl_dump_dests,
+	},
+	{
+		.cmd	= IPVS_CMD_NEW_DAEMON,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_DEL_DAEMON,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_GET_DAEMON,
+		.flags	= GENL_ADMIN_PERM,
+		.dumpit	= ip_vs_genl_dump_daemons,
+	},
+	{
+		.cmd	= IPVS_CMD_SET_CONFIG,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_GET_CONFIG,
+		.flags	= GENL_ADMIN_PERM,
+		.doit	= ip_vs_genl_get_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_GET_INFO,
+		.flags	= GENL_ADMIN_PERM,
+		.doit	= ip_vs_genl_get_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_ZERO,
+		.flags	= GENL_ADMIN_PERM,
+		.policy	= ip_vs_cmd_policy,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+	{
+		.cmd	= IPVS_CMD_FLUSH,
+		.flags	= GENL_ADMIN_PERM,
+		.doit	= ip_vs_genl_set_cmd,
+	},
+};
+
+static int __init ip_vs_genl_register(void)
+{
+	int ret, i;
+
+	ret = genl_register_family(&ip_vs_genl_family);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < ARRAY_SIZE(ip_vs_genl_ops); i++) {
+		ret = genl_register_ops(&ip_vs_genl_family, &ip_vs_genl_ops[i]);
+		if (ret)
+			goto err_out;
+	}
+	return 0;
+
+err_out:
+	genl_unregister_family(&ip_vs_genl_family);
+	return ret;
+}
+
+static void ip_vs_genl_unregister(void)
+{
+	genl_unregister_family(&ip_vs_genl_family);
+}
+
+/* End of Generic Netlink interface definitions */
+
 
 int __init ip_vs_control_init(void)
 {
···
 	ret = nf_register_sockopt(&ip_vs_sockopts);
 	if (ret) {
 		IP_VS_ERR("cannot register sockopt.\n");
+		return ret;
+	}
+
+	ret = ip_vs_genl_register();
+	if (ret) {
+		IP_VS_ERR("cannot register Generic Netlink interface.\n");
+		nf_unregister_sockopt(&ip_vs_sockopts);
 		return ret;
 	}
 
···
 	unregister_sysctl_table(sysctl_header);
 	proc_net_remove(&init_net, "ip_vs_stats");
 	proc_net_remove(&init_net, "ip_vs");
+	ip_vs_genl_unregister();
 	nf_unregister_sockopt(&ip_vs_sockopts);
 	LeaveFunction(2);
 }

net/ipv4/ipvs/ip_vs_est.c

···
 	est->outbps = stats->outbps<<5;
 
 	spin_lock_bh(&est_lock);
-	if (list_empty(&est_list))
-		mod_timer(&est_timer, jiffies + 2 * HZ);
 	list_add(&est->list, &est_list);
 	spin_unlock_bh(&est_lock);
 }
···
 
 	spin_lock_bh(&est_lock);
 	list_del(&est->list);
-	while (list_empty(&est_list) && try_to_del_timer_sync(&est_timer) < 0) {
-		spin_unlock_bh(&est_lock);
-		cpu_relax();
-		spin_lock_bh(&est_lock);
-	}
 	spin_unlock_bh(&est_lock);
 }
 
···
 	est->outpps = 0;
 	est->inbps = 0;
 	est->outbps = 0;
+}
+
+int __init ip_vs_estimator_init(void)
+{
+	mod_timer(&est_timer, jiffies + 2 * HZ);
+	return 0;
+}
+
+void ip_vs_estimator_cleanup(void)
+{
+	del_timer_sync(&est_timer);
 }

net/ipv4/ipvs/ip_vs_lblc.c

···
  *      IPVS lblc hash table
  */
 struct ip_vs_lblc_table {
-	rwlock_t	        lock;           /* lock for this table */
 	struct list_head        bucket[IP_VS_LBLC_TAB_SIZE];  /* hash bucket */
 	atomic_t                entries;        /* number of entries */
 	int                     max_size;       /* maximum size of entries */
···
 
 static struct ctl_table_header * sysctl_header;
 
-/*
- *      new/free a ip_vs_lblc_entry, which is a mapping of a destionation
- *      IP address to a server.
- */
-static inline struct ip_vs_lblc_entry *
-ip_vs_lblc_new(__be32 daddr, struct ip_vs_dest *dest)
-{
-	struct ip_vs_lblc_entry *en;
-
-	en = kmalloc(sizeof(struct ip_vs_lblc_entry), GFP_ATOMIC);
-	if (en == NULL) {
-		IP_VS_ERR("ip_vs_lblc_new(): no memory\n");
-		return NULL;
-	}
-
-	INIT_LIST_HEAD(&en->list);
-	en->addr = daddr;
-
-	atomic_inc(&dest->refcnt);
-	en->dest = dest;
-
-	return en;
-}
-
-
 static inline void ip_vs_lblc_free(struct ip_vs_lblc_entry *en)
 {
 	list_del(&en->list);
···
  *	Hash an entry in the ip_vs_lblc_table.
  *	returns bool success.
  */
-static int
+static void
 ip_vs_lblc_hash(struct ip_vs_lblc_table *tbl, struct ip_vs_lblc_entry *en)
 {
-	unsigned hash;
+	unsigned hash = ip_vs_lblc_hashkey(en->addr);
 
-	if (!list_empty(&en->list)) {
-		IP_VS_ERR("ip_vs_lblc_hash(): request for already hashed, "
-			  "called from %p\n", __builtin_return_address(0));
-		return 0;
-	}
-
-	/*
-	 *	Hash by destination IP address
-	 */
-	hash = ip_vs_lblc_hashkey(en->addr);
-
-	write_lock(&tbl->lock);
 	list_add(&en->list, &tbl->bucket[hash]);
 	atomic_inc(&tbl->entries);
-	write_unlock(&tbl->lock);
-
-	return 1;
 }
 
 
 /*
- *  Get ip_vs_lblc_entry associated with supplied parameters.
+ *  Get ip_vs_lblc_entry associated with supplied parameters. Called under read
+ *  lock
  */
 static inline struct ip_vs_lblc_entry *
 ip_vs_lblc_get(struct ip_vs_lblc_table *tbl, __be32 addr)
 {
-	unsigned hash;
+	unsigned hash = ip_vs_lblc_hashkey(addr);
 	struct ip_vs_lblc_entry *en;
 
-	hash = ip_vs_lblc_hashkey(addr);
-
-	read_lock(&tbl->lock);
-
-	list_for_each_entry(en, &tbl->bucket[hash], list) {
-		if (en->addr == addr) {
-			/* HIT */
-			read_unlock(&tbl->lock);
+	list_for_each_entry(en, &tbl->bucket[hash], list)
+		if (en->addr == addr)
 			return en;
-		}
-	}
-
-	read_unlock(&tbl->lock);
 
 	return NULL;
+}
+
+
+/*
+ * Create or update an ip_vs_lblc_entry, which is a mapping of a destination IP
+ * address to a server. Called under write lock.
+ */
+static inline struct ip_vs_lblc_entry *
+ip_vs_lblc_new(struct ip_vs_lblc_table *tbl, __be32 daddr,
+	       struct ip_vs_dest *dest)
+{
+	struct ip_vs_lblc_entry *en;
+
+	en = ip_vs_lblc_get(tbl, daddr);
+	if (!en) {
+		en = kmalloc(sizeof(*en), GFP_ATOMIC);
+		if (!en) {
+			IP_VS_ERR("ip_vs_lblc_new(): no memory\n");
+			return NULL;
+		}
+
+		en->addr = daddr;
+		en->lastuse = jiffies;
+
+		atomic_inc(&dest->refcnt);
+		en->dest = dest;
+
+		ip_vs_lblc_hash(tbl, en);
+	} else if (en->dest != dest) {
+		atomic_dec(&en->dest->refcnt);
+		atomic_inc(&dest->refcnt);
+		en->dest = dest;
+	}
+
+	return en;
 }
 
 
···
  */
 static void ip_vs_lblc_flush(struct ip_vs_lblc_table *tbl)
 {
-	int i;
 	struct ip_vs_lblc_entry *en, *nxt;
+	int i;
 
 	for (i=0; i<IP_VS_LBLC_TAB_SIZE; i++) {
-		write_lock(&tbl->lock);
 		list_for_each_entry_safe(en, nxt, &tbl->bucket[i], list) {
 			ip_vs_lblc_free(en);
 			atomic_dec(&tbl->entries);
 		}
-		write_unlock(&tbl->lock);
 	}
 }
 
 
-static inline void ip_vs_lblc_full_check(struct ip_vs_lblc_table *tbl)
+static inline void ip_vs_lblc_full_check(struct ip_vs_service *svc)
 {
+	struct ip_vs_lblc_table *tbl = svc->sched_data;
+	struct ip_vs_lblc_entry *en, *nxt;
 	unsigned long now = jiffies;
 	int i, j;
-	struct ip_vs_lblc_entry *en, *nxt;
 
 	for (i=0, j=tbl->rover; i<IP_VS_LBLC_TAB_SIZE; i++) {
 		j = (j + 1) & IP_VS_LBLC_TAB_MASK;
 
-		write_lock(&tbl->lock);
+		write_lock(&svc->sched_lock);
 		list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
 			if (time_before(now,
 					en->lastuse + sysctl_ip_vs_lblc_expiration))
···
 			ip_vs_lblc_free(en);
 			atomic_dec(&tbl->entries);
 		}
-		write_unlock(&tbl->lock);
+		write_unlock(&svc->sched_lock);
 	}
 	tbl->rover = j;
 }
···
  */
 static void ip_vs_lblc_check_expire(unsigned long data)
 {
-	struct ip_vs_lblc_table *tbl;
+	struct ip_vs_service *svc = (struct ip_vs_service *) data;
+	struct ip_vs_lblc_table *tbl = svc->sched_data;
 	unsigned long now = jiffies;
 	int goal;
 	int i, j;
 	struct ip_vs_lblc_entry *en, *nxt;
 
-	tbl = (struct ip_vs_lblc_table *)data;
-
 	if ((tbl->counter % COUNT_FOR_FULL_EXPIRATION) == 0) {
 		/* do full expiration check */
-		ip_vs_lblc_full_check(tbl);
+		ip_vs_lblc_full_check(svc);
 		tbl->counter = 1;
 		goto out;
 	}
···
 	for (i=0, j=tbl->rover; i<IP_VS_LBLC_TAB_SIZE; i++) {
 		j = (j + 1) & IP_VS_LBLC_TAB_MASK;
 
-		write_lock(&tbl->lock);
+		write_lock(&svc->sched_lock);
 		list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
 			if (time_before(now, en->lastuse + ENTRY_TIMEOUT))
 				continue;
···
 			atomic_dec(&tbl->entries);
 			goal--;
 		}
-		write_unlock(&tbl->lock);
+		write_unlock(&svc->sched_lock);
 		if (goal <= 0)
 			break;
 	}
···
 	/*
 	 *    Allocate the ip_vs_lblc_table for this service
 	 */
-	tbl = kmalloc(sizeof(struct ip_vs_lblc_table), GFP_ATOMIC);
+	tbl = kmalloc(sizeof(*tbl), GFP_ATOMIC);
 	if (tbl == NULL) {
 		IP_VS_ERR("ip_vs_lblc_init_svc(): no memory\n");
 		return -ENOMEM;
 	}
 	svc->sched_data = tbl;
 	IP_VS_DBG(6, "LBLC hash table (memory=%Zdbytes) allocated for "
-		  "current service\n",
-		  sizeof(struct ip_vs_lblc_table));
+		  "current service\n", sizeof(*tbl));
 
 	/*
 	 *    Initialize the hash buckets
···
 	for (i=0; i<IP_VS_LBLC_TAB_SIZE; i++) {
 		INIT_LIST_HEAD(&tbl->bucket[i]);
 	}
-	rwlock_init(&tbl->lock);
 	tbl->max_size = IP_VS_LBLC_TAB_SIZE*16;
 	tbl->rover = 0;
 	tbl->counter = 1;
···
 	 *    Hook periodic timer for garbage collection
 	 */
 	setup_timer(&tbl->periodic_timer, ip_vs_lblc_check_expire,
-			(unsigned long)tbl);
-	tbl->periodic_timer.expires = jiffies+CHECK_EXPIRE_INTERVAL;
-	add_timer(&tbl->periodic_timer);
+			(unsigned long)svc);
+	mod_timer(&tbl->periodic_timer, jiffies + CHECK_EXPIRE_INTERVAL);
 
 	return 0;
 }
···
 	ip_vs_lblc_flush(tbl);
 
 	/* release the table itself */
-	kfree(svc->sched_data);
+	kfree(tbl);
 	IP_VS_DBG(6, "LBLC hash table (memory=%Zdbytes) released\n",
-		  sizeof(struct ip_vs_lblc_table));
+		  sizeof(*tbl));
 
-	return 0;
-}
-
-
-static int ip_vs_lblc_update_svc(struct ip_vs_service *svc)
-{
 	return 0;
 }
 
 
 static inline struct ip_vs_dest *
-__ip_vs_wlc_schedule(struct ip_vs_service *svc, struct iphdr *iph)
+__ip_vs_lblc_schedule(struct ip_vs_service *svc, struct iphdr *iph)
 {
 	struct ip_vs_dest *dest, *least;
 	int loh, doh;
···
 static struct ip_vs_dest *
 ip_vs_lblc_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
 {
-	struct ip_vs_dest *dest;
-	struct ip_vs_lblc_table *tbl;
-	struct ip_vs_lblc_entry *en;
+	struct ip_vs_lblc_table *tbl = svc->sched_data;
 	struct iphdr *iph = ip_hdr(skb);
+	struct ip_vs_dest *dest = NULL;
+	struct ip_vs_lblc_entry *en;
 
 	IP_VS_DBG(6, "ip_vs_lblc_schedule(): Scheduling...\n");
 
-	tbl = (struct ip_vs_lblc_table *)svc->sched_data;
+	/* First look in our cache */
+	read_lock(&svc->sched_lock);
 	en = ip_vs_lblc_get(tbl, iph->daddr);
-	if (en == NULL) {
-		dest = __ip_vs_wlc_schedule(svc, iph);
-		if (dest == NULL) {
-			IP_VS_DBG(1, "no destination available\n");
-			return NULL;
-		}
-		en = ip_vs_lblc_new(iph->daddr, dest);
-		if (en == NULL) {
-			return NULL;
-		}
-		ip_vs_lblc_hash(tbl, en);
-	} else {
-		dest = en->dest;
-		if (!(dest->flags & IP_VS_DEST_F_AVAILABLE)
-		    || atomic_read(&dest->weight) <= 0
-		    || is_overloaded(dest, svc)) {
-			dest = __ip_vs_wlc_schedule(svc, iph);
-			if (dest == NULL) {
-				IP_VS_DBG(1, "no destination available\n");
-				return NULL;
-			}
-			atomic_dec(&en->dest->refcnt);
-			atomic_inc(&dest->refcnt);
-			en->dest = dest;
-		}
-	}
-	en->lastuse = jiffies;
+	if (en) {
+		/* We only hold a read lock, but this is atomic */
+		en->lastuse = jiffies;
 
+		/*
+		 * If the destination is not available, i.e. it's in the trash,
+		 * we must ignore it, as it may be removed from under our feet,
+		 * if someone drops our reference count. Our caller only makes
+		 * sure that destinations, that are not in the trash, are not
+		 * moved to the trash, while we are scheduling. But anyone can
+		 * free up entries from the trash at any time.
+		 */
+
+		if (en->dest->flags & IP_VS_DEST_F_AVAILABLE)
+			dest = en->dest;
+	}
+	read_unlock(&svc->sched_lock);
+
+	/* If the destination has a weight and is not overloaded, use it */
+	if (dest && atomic_read(&dest->weight) > 0 && !is_overloaded(dest, svc))
+		goto out;
+
+	/* No cache entry or it is invalid, time to schedule */
+	dest = __ip_vs_lblc_schedule(svc, iph);
+	if (!dest) {
+		IP_VS_DBG(1, "no destination available\n");
+		return NULL;
+	}
+
+	/* If we fail to create a cache entry, we'll just use the valid dest */
+	write_lock(&svc->sched_lock);
+	ip_vs_lblc_new(tbl, iph->daddr, dest);
+	write_unlock(&svc->sched_lock);
+
+out:
 	IP_VS_DBG(6, "LBLC: destination IP address %u.%u.%u.%u "
 		  "--> server %u.%u.%u.%u:%d\n",
-		  NIPQUAD(en->addr),
+		  NIPQUAD(iph->daddr),
 		  NIPQUAD(dest->addr),
 		  ntohs(dest->port));
 
···
 	.n_list =		LIST_HEAD_INIT(ip_vs_lblc_scheduler.n_list),
 	.init_service =		ip_vs_lblc_init_svc,
 	.done_service =		ip_vs_lblc_done_svc,
-	.update_service =	ip_vs_lblc_update_svc,
 	.schedule =		ip_vs_lblc_schedule,
 };
 

net/ipv4/ipvs/ip_vs_lblcr.c

···
 			return NULL;
 	}
 
-	e = kmalloc(sizeof(struct ip_vs_dest_list), GFP_ATOMIC);
+	e = kmalloc(sizeof(*e), GFP_ATOMIC);
 	if (e == NULL) {
 		IP_VS_ERR("ip_vs_dest_set_insert(): no memory\n");
 		return NULL;
···
 	e->dest = dest;
 
 	/* link it to the list */
-	write_lock(&set->lock);
 	e->next = set->list;
 	set->list = e;
 	atomic_inc(&set->size);
-	write_unlock(&set->lock);
 
 	set->lastmod = jiffies;
 	return e;
···
 {
 	struct ip_vs_dest_list *e, **ep;
 
-	write_lock(&set->lock);
 	for (ep=&set->list, e=*ep; e!=NULL; e=*ep) {
 		if (e->dest == dest) {
 			/* HIT */
···
 		}
 		ep = &e->next;
 	}
-	write_unlock(&set->lock);
 }
 
 static void ip_vs_dest_set_eraseall(struct ip_vs_dest_set *set)
···
 	if (set == NULL)
 		return NULL;
 
-	read_lock(&set->lock);
 	/* select the first destination server, whose weight > 0 */
 	for (e=set->list; e!=NULL; e=e->next) {
 		least = e->dest;
···
 			goto nextstage;
 		}
 	}
-	read_unlock(&set->lock);
 	return NULL;
 
 	/* find the destination with the weighted least load */
···
 			loh = doh;
 		}
 	}
-	read_unlock(&set->lock);
 
 	IP_VS_DBG(6, "ip_vs_dest_set_min: server %d.%d.%d.%d:%d "
 		  "activeconns %d refcnt %d weight %d overhead %d\n",
···
 	if (set == NULL)
 		return NULL;
 
-	read_lock(&set->lock);
 	/* select the first destination server, whose weight > 0 */
 	for (e=set->list; e!=NULL; e=e->next) {
 		most = e->dest;
···
 			goto nextstage;
 		}
 	}
-	read_unlock(&set->lock);
 	return NULL;
 
 	/* find the destination with the weighted most load */
···
 			moh = doh;
 		}
 	}
-	read_unlock(&set->lock);
 
 	IP_VS_DBG(6, "ip_vs_dest_set_max: server %d.%d.%d.%d:%d "
 		  "activeconns %d refcnt %d weight %d overhead %d\n",
···
  *      IPVS lblcr hash table
  */
 struct ip_vs_lblcr_table {
-	rwlock_t	        lock;           /* lock for this table */
 	struct list_head        bucket[IP_VS_LBLCR_TAB_SIZE];  /* hash bucket */
 	atomic_t                entries;        /* number of entries */
 	int                     max_size;       /* maximum size of entries */
···
 
 static struct ctl_table_header * sysctl_header;
 
-/*
- *      new/free a ip_vs_lblcr_entry, which is a mapping of a destination
- *      IP address to a server.
- */
-static inline struct ip_vs_lblcr_entry *ip_vs_lblcr_new(__be32 daddr)
-{
-	struct ip_vs_lblcr_entry *en;
-
-	en = kmalloc(sizeof(struct ip_vs_lblcr_entry), GFP_ATOMIC);
-	if (en == NULL) {
-		IP_VS_ERR("ip_vs_lblcr_new(): no memory\n");
-		return NULL;
-	}
-
-	INIT_LIST_HEAD(&en->list);
-	en->addr = daddr;
-
-	/* initilize its dest set */
-	atomic_set(&(en->set.size), 0);
-	en->set.list = NULL;
-	rwlock_init(&en->set.lock);
-
-	return en;
-}
-
-
 static inline void ip_vs_lblcr_free(struct ip_vs_lblcr_entry *en)
 {
 	list_del(&en->list);
···
  *	Hash an entry in the ip_vs_lblcr_table.
  *	returns bool success.
  */
-static int
+static void
 ip_vs_lblcr_hash(struct ip_vs_lblcr_table *tbl, struct ip_vs_lblcr_entry *en)
 {
-	unsigned hash;
+	unsigned hash = ip_vs_lblcr_hashkey(en->addr);
 
-	if (!list_empty(&en->list)) {
-		IP_VS_ERR("ip_vs_lblcr_hash(): request for already hashed, "
-			  "called from %p\n", __builtin_return_address(0));
-		return 0;
-	}
-
-	/*
-	 *	Hash by destination IP address
-	 */
-	hash = ip_vs_lblcr_hashkey(en->addr);
-
-	write_lock(&tbl->lock);
 	list_add(&en->list, &tbl->bucket[hash]);
 	atomic_inc(&tbl->entries);
-	write_unlock(&tbl->lock);
-
-	return 1;
 }
 
 
 /*
- *  Get ip_vs_lblcr_entry associated with supplied parameters.
+ *  Get ip_vs_lblcr_entry associated with supplied parameters. Called under
+ *  read lock.
  */
 static inline struct ip_vs_lblcr_entry *
 ip_vs_lblcr_get(struct ip_vs_lblcr_table *tbl, __be32 addr)
 {
-	unsigned hash;
+	unsigned hash = ip_vs_lblcr_hashkey(addr);
 	struct ip_vs_lblcr_entry *en;
 
-	hash = ip_vs_lblcr_hashkey(addr);
-
-	read_lock(&tbl->lock);
-
-	list_for_each_entry(en, &tbl->bucket[hash], list) {
-		if (en->addr == addr) {
-			/* HIT */
-			read_unlock(&tbl->lock);
+	list_for_each_entry(en, &tbl->bucket[hash], list)
+		if (en->addr == addr)
 			return en;
-		}
-	}
-
-	read_unlock(&tbl->lock);
 
 	return NULL;
+}
+
+
+/*
+ * Create or update an ip_vs_lblcr_entry, which is a mapping of a destination
+ * IP address to a server. Called under write lock.
+ */
+static inline struct ip_vs_lblcr_entry *
+ip_vs_lblcr_new(struct ip_vs_lblcr_table *tbl,  __be32 daddr,
+		struct ip_vs_dest *dest)
+{
+	struct ip_vs_lblcr_entry *en;
+
+	en = ip_vs_lblcr_get(tbl, daddr);
+	if (!en) {
+		en = kmalloc(sizeof(*en), GFP_ATOMIC);
+		if (!en) {
+			IP_VS_ERR("ip_vs_lblcr_new(): no memory\n");
+			return NULL;
+		}
+
+		en->addr = daddr;
+		en->lastuse = jiffies;
+
+		/* initilize its dest set */
+		atomic_set(&(en->set.size), 0);
+		en->set.list = NULL;
+		rwlock_init(&en->set.lock);
+
+		ip_vs_lblcr_hash(tbl, en);
+	}
+
+	write_lock(&en->set.lock);
+	ip_vs_dest_set_insert(&en->set, dest);
+	write_unlock(&en->set.lock);
+
+	return en;
 }
 
 
···
 	int i;
 	struct ip_vs_lblcr_entry *en, *nxt;
 
+	/* No locking required, only called during cleanup. */
 	for (i=0; i<IP_VS_LBLCR_TAB_SIZE; i++) {
-		write_lock(&tbl->lock);
 		list_for_each_entry_safe(en, nxt, &tbl->bucket[i], list) {
 			ip_vs_lblcr_free(en);
-			atomic_dec(&tbl->entries);
 		}
-		write_unlock(&tbl->lock);
 	}
 }
 
 
-static inline void ip_vs_lblcr_full_check(struct ip_vs_lblcr_table *tbl)
+static inline void ip_vs_lblcr_full_check(struct ip_vs_service *svc)
 {
+	struct ip_vs_lblcr_table *tbl = svc->sched_data;
 	unsigned long now = jiffies;
 	int i, j;
 	struct ip_vs_lblcr_entry *en, *nxt;
···
 	for (i=0, j=tbl->rover; i<IP_VS_LBLCR_TAB_SIZE; i++) {
 		j = (j + 1) & IP_VS_LBLCR_TAB_MASK;
 
-		write_lock(&tbl->lock);
+		write_lock(&svc->sched_lock);
 		list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
 			if (time_after(en->lastuse+sysctl_ip_vs_lblcr_expiration,
 				       now))
···
 			ip_vs_lblcr_free(en);
 			atomic_dec(&tbl->entries);
 		}
-		write_unlock(&tbl->lock);
+		write_unlock(&svc->sched_lock);
 	}
 	tbl->rover = j;
 }
···
  */
 static void ip_vs_lblcr_check_expire(unsigned long data)
 {
-	struct ip_vs_lblcr_table *tbl;
+	struct ip_vs_service *svc = (struct ip_vs_service *) data;
+	struct ip_vs_lblcr_table *tbl = svc->sched_data;
 	unsigned long now = jiffies;
 	int goal;
 	int i, j;
 	struct ip_vs_lblcr_entry *en, *nxt;
 
-	tbl = (struct ip_vs_lblcr_table *)data;
-
 	if ((tbl->counter % COUNT_FOR_FULL_EXPIRATION) == 0) {
 		/* do full expiration check */
-		ip_vs_lblcr_full_check(tbl);
+		ip_vs_lblcr_full_check(svc);
 		tbl->counter = 1;
 		goto out;
 	}
···
 	for (i=0, j=tbl->rover; i<IP_VS_LBLCR_TAB_SIZE; i++) {
 		j = (j + 1) & IP_VS_LBLCR_TAB_MASK;
 
-		write_lock(&tbl->lock);
+		write_lock(&svc->sched_lock);
 		list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
 			if (time_before(now, en->lastuse+ENTRY_TIMEOUT))
 				continue;
···
 			atomic_dec(&tbl->entries);
 			goal--;
 		}
-		write_unlock(&tbl->lock);
+		write_unlock(&svc->sched_lock);
 		if (goal <= 0)
 			break;
 	}
···
 	/*
 	 *    Allocate the ip_vs_lblcr_table for this service
 	 */
-	tbl = kmalloc(sizeof(struct ip_vs_lblcr_table), GFP_ATOMIC);
+	tbl = kmalloc(sizeof(*tbl), GFP_ATOMIC);
 	if (tbl == NULL) {
 		IP_VS_ERR("ip_vs_lblcr_init_svc(): no memory\n");
 		return -ENOMEM;
 	}
 	svc->sched_data = tbl;
 	IP_VS_DBG(6, "LBLCR hash table (memory=%Zdbytes) allocated for "
-		  "current service\n",
-		  sizeof(struct ip_vs_lblcr_table));
+		  "current service\n", sizeof(*tbl));
 
 	/*
 	 *    Initialize the hash buckets
···
 	for (i=0; i<IP_VS_LBLCR_TAB_SIZE; i++) {
 		INIT_LIST_HEAD(&tbl->bucket[i]);
 	}
-	rwlock_init(&tbl->lock);
 	tbl->max_size = IP_VS_LBLCR_TAB_SIZE*16;
 	tbl->rover = 0;
 	tbl->counter = 1;
···
 	 *    Hook periodic timer for garbage collection
 	 */
 	setup_timer(&tbl->periodic_timer, ip_vs_lblcr_check_expire,
-			(unsigned long)tbl);
-	tbl->periodic_timer.expires = jiffies+CHECK_EXPIRE_INTERVAL;
-	add_timer(&tbl->periodic_timer);
+			(unsigned long)svc);
+	mod_timer(&tbl->periodic_timer, jiffies + CHECK_EXPIRE_INTERVAL);
 
 	return 0;
 }
···
 	ip_vs_lblcr_flush(tbl);
 
 	/* release the table itself */
-	kfree(svc->sched_data);
+	kfree(tbl);
 	IP_VS_DBG(6, "LBLCR hash table (memory=%Zdbytes) released\n",
-		  sizeof(struct ip_vs_lblcr_table));
+		  sizeof(*tbl));
 
-	return 0;
-}
-
-
-static int ip_vs_lblcr_update_svc(struct ip_vs_service *svc)
-{
 	return 0;
 }
 
 
 static inline struct ip_vs_dest *
-__ip_vs_wlc_schedule(struct ip_vs_service *svc, struct iphdr *iph)
+__ip_vs_lblcr_schedule(struct ip_vs_service *svc, struct iphdr *iph)
 {
 	struct ip_vs_dest *dest, *least;
 	int loh, doh;
···
 static struct ip_vs_dest *
 ip_vs_lblcr_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
 {
-	struct ip_vs_dest *dest;
-	struct ip_vs_lblcr_table *tbl;
-	struct ip_vs_lblcr_entry *en;
+	struct ip_vs_lblcr_table *tbl = svc->sched_data;
 	struct iphdr *iph = ip_hdr(skb);
+	struct ip_vs_dest *dest = NULL;
+	struct ip_vs_lblcr_entry *en;
 
 	IP_VS_DBG(6, "ip_vs_lblcr_schedule(): Scheduling...\n");
 
-	tbl = (struct ip_vs_lblcr_table *)svc->sched_data;
+	/* First look in our cache */
+	read_lock(&svc->sched_lock);
 	en = ip_vs_lblcr_get(tbl, iph->daddr);
-	if (en == NULL) {
-		dest = __ip_vs_wlc_schedule(svc, iph);
-		if (dest == NULL) {
-			IP_VS_DBG(1, "no destination available\n");
-			return NULL;
-		}
-		en = ip_vs_lblcr_new(iph->daddr);
-		if (en == NULL) {
-			return NULL;
-		}
-		ip_vs_dest_set_insert(&en->set, dest);
-		ip_vs_lblcr_hash(tbl, en);
-	} else {
+	if (en) {
+		/* We only hold a read lock, but this is atomic */
+		en->lastuse = jiffies;
+
+		/* Get the least loaded destination */
+		read_lock(&en->set.lock);
 		dest = ip_vs_dest_set_min(&en->set);
-		if (!dest || is_overloaded(dest, svc)) {
-			dest = __ip_vs_wlc_schedule(svc, iph);
-			if (dest == NULL) {
-				IP_VS_DBG(1, "no destination available\n");
-				return NULL;
-			}
-			ip_vs_dest_set_insert(&en->set, dest);
-		}
+		read_unlock(&en->set.lock);
+
+		/* More than one destination + enough time passed by, cleanup */
 		if (atomic_read(&en->set.size) > 1 &&
-		    jiffies-en->set.lastmod > sysctl_ip_vs_lblcr_expiration) {
+				time_after(jiffies, en->set.lastmod +
+				sysctl_ip_vs_lblcr_expiration)) {
 			struct ip_vs_dest *m;
+
+			write_lock(&en->set.lock);
 			m = ip_vs_dest_set_max(&en->set);
 			if (m)
 				ip_vs_dest_set_erase(&en->set, m);
+			write_unlock(&en->set.lock);
 		}
-	}
-	en->lastuse = jiffies;
 
+		/* If the destination is not overloaded, use it */
+		if (dest && !is_overloaded(dest, svc)) {
+			read_unlock(&svc->sched_lock);
+			goto out;
+		}
+
+		/* The cache entry is invalid, time to schedule */
+		dest = __ip_vs_lblcr_schedule(svc, iph);
+		if (!dest) {
+			IP_VS_DBG(1, "no destination available\n");
+			read_unlock(&svc->sched_lock);
+			return NULL;
+		}
+
+		/* Update our cache entry */
+		write_lock(&en->set.lock);
+		ip_vs_dest_set_insert(&en->set, dest);
+		write_unlock(&en->set.lock);
+	}
+	read_unlock(&svc->sched_lock);
+
+	if (dest)
+		goto out;
+
+	/* No cache entry, time to schedule */
+	dest = __ip_vs_lblcr_schedule(svc, iph);
+	if (!dest) {
+		IP_VS_DBG(1, "no destination available\n");
+		return NULL;
+	}
+
+	/* If we fail to create a cache entry, we'll just use the valid dest */
+	write_lock(&svc->sched_lock);
+	ip_vs_lblcr_new(tbl, iph->daddr, dest);
+	write_unlock(&svc->sched_lock);
+
+out:
 	IP_VS_DBG(6, "LBLCR: destination IP address %u.%u.%u.%u "
 		  "--> server %u.%u.%u.%u:%d\n",
-		  NIPQUAD(en->addr),
+		  NIPQUAD(iph->daddr),
 		  NIPQUAD(dest->addr),
 		  ntohs(dest->port));
 
···
 	.n_list =		LIST_HEAD_INIT(ip_vs_lblcr_scheduler.n_list),
 	.init_service =		ip_vs_lblcr_init_svc,
 	.done_service =		ip_vs_lblcr_done_svc,
-	.update_service =	ip_vs_lblcr_update_svc,
 	.schedule =		ip_vs_lblcr_schedule,
 };
 

net/ipv4/ipvs/ip_vs_lc.c

···
 #include <net/ip_vs.h>
 
 
-static int ip_vs_lc_init_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
-static int ip_vs_lc_done_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
-static int ip_vs_lc_update_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
 static inline unsigned int
 ip_vs_lc_dest_overhead(struct ip_vs_dest *dest)
 {
···
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_lc_scheduler.n_list),
-	.init_service =		ip_vs_lc_init_svc,
-	.done_service =		ip_vs_lc_done_svc,
-	.update_service =	ip_vs_lc_update_svc,
 	.schedule =		ip_vs_lc_schedule,
 };
 

net/ipv4/ipvs/ip_vs_nq.c

···
 #include <net/ip_vs.h>
 
 
-static int
-ip_vs_nq_init_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
-static int
-ip_vs_nq_done_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
-static int
-ip_vs_nq_update_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
 static inline unsigned int
 ip_vs_nq_dest_overhead(struct ip_vs_dest *dest)
 {
···
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_nq_scheduler.n_list),
-	.init_service =		ip_vs_nq_init_svc,
-	.done_service =		ip_vs_nq_done_svc,
-	.update_service =	ip_vs_nq_update_svc,
 	.schedule =		ip_vs_nq_schedule,
 };
 

net/ipv4/ipvs/ip_vs_proto_ah.c

···
-/*
- * ip_vs_proto_ah.c:	AH IPSec load balancing support for IPVS
- *
- * Authors:	Julian Anastasov <[e-mail]>, February 2002
- *		Wensong Zhang <[e-mail]>
- *
- *		This program is free software; you can redistribute it and/or
- *		modify it under the terms of the GNU General Public License
- *		version 2 as published by the Free Software Foundation;
- *
- */
-
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-
-#include <net/ip_vs.h>
-
-
-/* TODO:
-
-struct isakmp_hdr {
-	__u8		icookie[8];
-	__u8		rcookie[8];
-	__u8		np;
-	__u8		version;
-	__u8		xchgtype;
-	__u8		flags;
-	__u32		msgid;
-	__u32		length;
-};
-
-*/
-
-#define PORT_ISAKMP	500
-
-
-static struct ip_vs_conn *
-ah_conn_in_get(const struct sk_buff *skb,
-	       struct ip_vs_protocol *pp,
-	       const struct iphdr *iph,
-	       unsigned int proto_off,
-	       int inverse)
-{
-	struct ip_vs_conn *cp;
-
-	if (likely(!inverse)) {
-		cp = ip_vs_conn_in_get(IPPROTO_UDP,
-				       iph->saddr,
-				       htons(PORT_ISAKMP),
-				       iph->daddr,
-				       htons(PORT_ISAKMP));
-	} else {
-		cp = ip_vs_conn_in_get(IPPROTO_UDP,
-				       iph->daddr,
-				       htons(PORT_ISAKMP),
-				       iph->saddr,
-				       htons(PORT_ISAKMP));
-	}
-
-	if (!cp) {
-		/*
-		 * We are not sure if the packet is from our
-		 * service, so our conn_schedule hook should return NF_ACCEPT
-		 */
-		IP_VS_DBG(12, "Unknown ISAKMP entry for outin packet "
-			  "%s%s %u.%u.%u.%u->%u.%u.%u.%u\n",
-			  inverse ? "ICMP+" : "",
-			  pp->name,
-			  NIPQUAD(iph->saddr),
-			  NIPQUAD(iph->daddr));
-	}
-
-	return cp;
-}
-
-
-static struct ip_vs_conn *
-ah_conn_out_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
-		const struct iphdr *iph, unsigned int proto_off, int inverse)
-{
-	struct ip_vs_conn *cp;
-
-	if (likely(!inverse)) {
-		cp = ip_vs_conn_out_get(IPPROTO_UDP,
-					iph->saddr,
-					htons(PORT_ISAKMP),
-					iph->daddr,
-					htons(PORT_ISAKMP));
-	} else {
-		cp = ip_vs_conn_out_get(IPPROTO_UDP,
-					iph->daddr,
-					htons(PORT_ISAKMP),
-					iph->saddr,
-					htons(PORT_ISAKMP));
-	}
-
-	if (!cp) {
-		IP_VS_DBG(12, "Unknown ISAKMP entry for inout packet "
-			  "%s%s %u.%u.%u.%u->%u.%u.%u.%u\n",
-			  inverse ? "ICMP+" : "",
-			  pp->name,
-			  NIPQUAD(iph->saddr),
-			  NIPQUAD(iph->daddr));
-	}
-
-	return cp;
-}
-
-
-static int
-ah_conn_schedule(struct sk_buff *skb,
-		 struct ip_vs_protocol *pp,
-		 int *verdict, struct ip_vs_conn **cpp)
-{
-	/*
-	 * AH is only related traffic. Pass the packet to IP stack.
-	 */
-	*verdict = NF_ACCEPT;
-	return 0;
-}
-
-
-static void
-ah_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
-		int offset, const char *msg)
-{
-	char buf[256];
-	struct iphdr _iph, *ih;
-
-	ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
-	if (ih == NULL)
-		sprintf(buf, "%s TRUNCATED", pp->name);
-	else
-		sprintf(buf, "%s %u.%u.%u.%u->%u.%u.%u.%u",
-			pp->name, NIPQUAD(ih->saddr),
-			NIPQUAD(ih->daddr));
-
-	printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
-}
-
-
-static void ah_init(struct ip_vs_protocol *pp)
-{
-	/* nothing to do now */
-}
-
-
-static void ah_exit(struct ip_vs_protocol *pp)
-{
-	/* nothing to do now */
-}
-
-
-struct ip_vs_protocol ip_vs_protocol_ah = {
-	.name =			"AH",
-	.protocol =		IPPROTO_AH,
-	.num_states =		1,
-	.dont_defrag =		1,
-	.init =			ah_init,
-	.exit =			ah_exit,
-	.conn_schedule =	ah_conn_schedule,
-	.conn_in_get =		ah_conn_in_get,
-	.conn_out_get =		ah_conn_out_get,
-	.snat_handler =		NULL,
-	.dnat_handler =		NULL,
-	.csum_check =		NULL,
-	.state_transition =	NULL,
-	.register_app =		NULL,
-	.unregister_app =	NULL,
-	.app_conn_bind =	NULL,
-	.debug_packet =		ah_debug_packet,
-	.timeout_change =	NULL,		/* ISAKMP */
-	.set_state_timeout =	NULL,
-};

net/ipv4/ipvs/ip_vs_proto_esp.c net/ipv4/ipvs/ip_vs_proto_ah_esp.c

···
 /*
- * ip_vs_proto_esp.c:	ESP IPSec load balancing support for IPVS
+ * ip_vs_proto_ah_esp.c:	AH/ESP IPSec load balancing support for IPVS
  *
  * Authors:	Julian Anastasov <[e-mail]>, February 2002
  *		Wensong Zhang <[e-mail]>
···
 
 
 static struct ip_vs_conn *
-esp_conn_in_get(const struct sk_buff *skb,
-		struct ip_vs_protocol *pp,
-		const struct iphdr *iph,
-		unsigned int proto_off,
-		int inverse)
+ah_esp_conn_in_get(const struct sk_buff *skb,
+		   struct ip_vs_protocol *pp,
+		   const struct iphdr *iph,
+		   unsigned int proto_off,
+		   int inverse)
 {
 	struct ip_vs_conn *cp;
 
···
 
 
 static struct ip_vs_conn *
-esp_conn_out_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
-		 const struct iphdr *iph, unsigned int proto_off, int inverse)
+ah_esp_conn_out_get(const struct sk_buff *skb, struct ip_vs_protocol *pp,
+		    const struct iphdr *iph, unsigned int proto_off, int inverse)
 {
 	struct ip_vs_conn *cp;
 
···
 
 
 static int
-esp_conn_schedule(struct sk_buff *skb, struct ip_vs_protocol *pp,
-		  int *verdict, struct ip_vs_conn **cpp)
+ah_esp_conn_schedule(struct sk_buff *skb,
+		     struct ip_vs_protocol *pp,
+		     int *verdict, struct ip_vs_conn **cpp)
 {
 	/*
-	 * ESP is only related traffic. Pass the packet to IP stack.
+	 * AH/ESP is only related traffic. Pass the packet to IP stack.
 	 */
 	*verdict = NF_ACCEPT;
 	return 0;
···
 
 
 static void
-esp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
-		 int offset, const char *msg)
+ah_esp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
+		    int offset, const char *msg)
 {
 	char buf[256];
 	struct iphdr _iph, *ih;
···
 }
 
 
-static void esp_init(struct ip_vs_protocol *pp)
+static void ah_esp_init(struct ip_vs_protocol *pp)
 {
 	/* nothing to do now */
 }
 
 
-static void esp_exit(struct ip_vs_protocol *pp)
+static void ah_esp_exit(struct ip_vs_protocol *pp)
 {
 	/* nothing to do now */
 }
 
 
-struct ip_vs_protocol ip_vs_protocol_esp = {
-	.name =			"ESP",
-	.protocol =		IPPROTO_ESP,
+#ifdef CONFIG_IP_VS_PROTO_AH
+struct ip_vs_protocol ip_vs_protocol_ah = {
+	.name =			"AH",
+	.protocol =		IPPROTO_AH,
 	.num_states =		1,
 	.dont_defrag =		1,
-	.init =			esp_init,
-	.exit =			esp_exit,
-	.conn_schedule =	esp_conn_schedule,
-	.conn_in_get =		esp_conn_in_get,
-	.conn_out_get =		esp_conn_out_get,
+	.init =			ah_esp_init,
+	.exit =			ah_esp_exit,
+	.conn_schedule =	ah_esp_conn_schedule,
+	.conn_in_get =		ah_esp_conn_in_get,
+	.conn_out_get =		ah_esp_conn_out_get,
 	.snat_handler =		NULL,
 	.dnat_handler =		NULL,
 	.csum_check =		NULL,
···
 	.register_app =		NULL,
 	.unregister_app =	NULL,
 	.app_conn_bind =	NULL,
-	.debug_packet =		esp_debug_packet,
+	.debug_packet =		ah_esp_debug_packet,
+	.timeout_change =	NULL,		/* ISAKMP */
+	.set_state_timeout =	NULL,
+};
+#endif
+
+#ifdef CONFIG_IP_VS_PROTO_ESP
+struct ip_vs_protocol ip_vs_protocol_esp = {
+	.name =			"ESP",
+	.protocol =		IPPROTO_ESP,
+	.num_states =		1,
+	.dont_defrag =		1,
+	.init =			ah_esp_init,
+	.exit =			ah_esp_exit,
+	.conn_schedule =	ah_esp_conn_schedule,
+	.conn_in_get =		ah_esp_conn_in_get,
+	.conn_out_get =		ah_esp_conn_out_get,
+	.snat_handler =		NULL,
+	.dnat_handler =		NULL,
+	.csum_check =		NULL,
+	.state_transition =	NULL,
+	.register_app =		NULL,
+	.unregister_app =	NULL,
+	.app_conn_bind =	NULL,
+	.debug_packet =		ah_esp_debug_packet,
 	.timeout_change =	NULL,		/* ISAKMP */
 };
+#endif

net/ipv4/ipvs/ip_vs_rr.c

···
 }
 
 
-static int ip_vs_rr_done_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
 static int ip_vs_rr_update_svc(struct ip_vs_service *svc)
 {
 	svc->sched_data = &svc->destinations;
···
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_rr_scheduler.n_list),
 	.init_service =		ip_vs_rr_init_svc,
-	.done_service =		ip_vs_rr_done_svc,
 	.update_service =	ip_vs_rr_update_svc,
 	.schedule =		ip_vs_rr_schedule,
 };

net/ipv4/ipvs/ip_vs_sed.c

···
 #include <net/ip_vs.h>
 
 
-static int
-ip_vs_sed_init_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
-static int
-ip_vs_sed_done_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
-static int
-ip_vs_sed_update_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
 static inline unsigned int
 ip_vs_sed_dest_overhead(struct ip_vs_dest *dest)
 {
···
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_sed_scheduler.n_list),
-	.init_service =		ip_vs_sed_init_svc,
-	.done_service =		ip_vs_sed_done_svc,
-	.update_service =	ip_vs_sed_update_svc,
 	.schedule =		ip_vs_sed_schedule,
 };
 

net/ipv4/ipvs/ip_vs_wlc.c

···
 #include <net/ip_vs.h>
 
 
-static int
-ip_vs_wlc_init_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
-static int
-ip_vs_wlc_done_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
-static int
-ip_vs_wlc_update_svc(struct ip_vs_service *svc)
-{
-	return 0;
-}
-
-
 static inline unsigned int
 ip_vs_wlc_dest_overhead(struct ip_vs_dest *dest)
 {
···
 	.refcnt =		ATOMIC_INIT(0),
 	.module =		THIS_MODULE,
 	.n_list =		LIST_HEAD_INIT(ip_vs_wlc_scheduler.n_list),
-	.init_service =		ip_vs_wlc_init_svc,
-	.done_service =		ip_vs_wlc_done_svc,
-	.update_service =	ip_vs_wlc_update_svc,
 	.schedule =		ip_vs_wlc_schedule,
 };