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-rw-r--r--net/ipv4/ipvs/ip_vs_ctl.c3441
1 files changed, 0 insertions, 3441 deletions
diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c
deleted file mode 100644
index 771551d8fba..00000000000
--- a/net/ipv4/ipvs/ip_vs_ctl.c
+++ /dev/null
@@ -1,3441 +0,0 @@
-/*
- * IPVS An implementation of the IP virtual server support for the
- * LINUX operating system. IPVS is now implemented as a module
- * over the NetFilter framework. IPVS can be used to build a
- * high-performance and highly available server based on a
- * cluster of servers.
- *
- * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
- * Peter Kese <peter.kese@ijs.si>
- * Julian Anastasov <ja@ssi.bg>
- *
- * 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:
- *
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/capability.h>
-#include <linux/fs.h>
-#include <linux/sysctl.h>
-#include <linux/proc_fs.h>
-#include <linux/workqueue.h>
-#include <linux/swap.h>
-#include <linux/seq_file.h>
-
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-#include <linux/mutex.h>
-
-#include <net/net_namespace.h>
-#include <net/ip.h>
-#ifdef CONFIG_IP_VS_IPV6
-#include <net/ipv6.h>
-#include <net/ip6_route.h>
-#endif
-#include <net/route.h>
-#include <net/sock.h>
-#include <net/genetlink.h>
-
-#include <asm/uaccess.h>
-
-#include <net/ip_vs.h>
-
-/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
-static DEFINE_MUTEX(__ip_vs_mutex);
-
-/* lock for service table */
-static DEFINE_RWLOCK(__ip_vs_svc_lock);
-
-/* lock for table with the real services */
-static DEFINE_RWLOCK(__ip_vs_rs_lock);
-
-/* lock for state and timeout tables */
-static DEFINE_RWLOCK(__ip_vs_securetcp_lock);
-
-/* lock for drop entry handling */
-static DEFINE_SPINLOCK(__ip_vs_dropentry_lock);
-
-/* lock for drop packet handling */
-static DEFINE_SPINLOCK(__ip_vs_droppacket_lock);
-
-/* 1/rate drop and drop-entry variables */
-int ip_vs_drop_rate = 0;
-int ip_vs_drop_counter = 0;
-static atomic_t ip_vs_dropentry = ATOMIC_INIT(0);
-
-/* number of virtual services */
-static int ip_vs_num_services = 0;
-
-/* sysctl variables */
-static int sysctl_ip_vs_drop_entry = 0;
-static int sysctl_ip_vs_drop_packet = 0;
-static int sysctl_ip_vs_secure_tcp = 0;
-static int sysctl_ip_vs_amemthresh = 1024;
-static int sysctl_ip_vs_am_droprate = 10;
-int sysctl_ip_vs_cache_bypass = 0;
-int sysctl_ip_vs_expire_nodest_conn = 0;
-int sysctl_ip_vs_expire_quiescent_template = 0;
-int sysctl_ip_vs_sync_threshold[2] = { 3, 50 };
-int sysctl_ip_vs_nat_icmp_send = 0;
-
-
-#ifdef CONFIG_IP_VS_DEBUG
-static int sysctl_ip_vs_debug_level = 0;
-
-int ip_vs_get_debug_level(void)
-{
- return sysctl_ip_vs_debug_level;
-}
-#endif
-
-#ifdef CONFIG_IP_VS_IPV6
-/* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
-static int __ip_vs_addr_is_local_v6(const struct in6_addr *addr)
-{
- struct rt6_info *rt;
- struct flowi fl = {
- .oif = 0,
- .nl_u = {
- .ip6_u = {
- .daddr = *addr,
- .saddr = { .s6_addr32 = {0, 0, 0, 0} }, } },
- };
-
- rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
- if (rt && rt->rt6i_dev && (rt->rt6i_dev->flags & IFF_LOOPBACK))
- return 1;
-
- return 0;
-}
-#endif
-/*
- * update_defense_level is called from keventd and from sysctl,
- * so it needs to protect itself from softirqs
- */
-static void update_defense_level(void)
-{
- struct sysinfo i;
- static int old_secure_tcp = 0;
- int availmem;
- int nomem;
- int to_change = -1;
-
- /* we only count free and buffered memory (in pages) */
- si_meminfo(&i);
- availmem = i.freeram + i.bufferram;
- /* however in linux 2.5 the i.bufferram is total page cache size,
- we need adjust it */
- /* si_swapinfo(&i); */
- /* availmem = availmem - (i.totalswap - i.freeswap); */
-
- nomem = (availmem < sysctl_ip_vs_amemthresh);
-
- local_bh_disable();
-
- /* drop_entry */
- spin_lock(&__ip_vs_dropentry_lock);
- switch (sysctl_ip_vs_drop_entry) {
- case 0:
- atomic_set(&ip_vs_dropentry, 0);
- break;
- case 1:
- if (nomem) {
- atomic_set(&ip_vs_dropentry, 1);
- sysctl_ip_vs_drop_entry = 2;
- } else {
- atomic_set(&ip_vs_dropentry, 0);
- }
- break;
- case 2:
- if (nomem) {
- atomic_set(&ip_vs_dropentry, 1);
- } else {
- atomic_set(&ip_vs_dropentry, 0);
- sysctl_ip_vs_drop_entry = 1;
- };
- break;
- case 3:
- atomic_set(&ip_vs_dropentry, 1);
- break;
- }
- spin_unlock(&__ip_vs_dropentry_lock);
-
- /* drop_packet */
- spin_lock(&__ip_vs_droppacket_lock);
- switch (sysctl_ip_vs_drop_packet) {
- case 0:
- ip_vs_drop_rate = 0;
- break;
- case 1:
- if (nomem) {
- ip_vs_drop_rate = ip_vs_drop_counter
- = sysctl_ip_vs_amemthresh /
- (sysctl_ip_vs_amemthresh-availmem);
- sysctl_ip_vs_drop_packet = 2;
- } else {
- ip_vs_drop_rate = 0;
- }
- break;
- case 2:
- if (nomem) {
- ip_vs_drop_rate = ip_vs_drop_counter
- = sysctl_ip_vs_amemthresh /
- (sysctl_ip_vs_amemthresh-availmem);
- } else {
- ip_vs_drop_rate = 0;
- sysctl_ip_vs_drop_packet = 1;
- }
- break;
- case 3:
- ip_vs_drop_rate = sysctl_ip_vs_am_droprate;
- break;
- }
- spin_unlock(&__ip_vs_droppacket_lock);
-
- /* secure_tcp */
- write_lock(&__ip_vs_securetcp_lock);
- switch (sysctl_ip_vs_secure_tcp) {
- case 0:
- if (old_secure_tcp >= 2)
- to_change = 0;
- break;
- case 1:
- if (nomem) {
- if (old_secure_tcp < 2)
- to_change = 1;
- sysctl_ip_vs_secure_tcp = 2;
- } else {
- if (old_secure_tcp >= 2)
- to_change = 0;
- }
- break;
- case 2:
- if (nomem) {
- if (old_secure_tcp < 2)
- to_change = 1;
- } else {
- if (old_secure_tcp >= 2)
- to_change = 0;
- sysctl_ip_vs_secure_tcp = 1;
- }
- break;
- case 3:
- if (old_secure_tcp < 2)
- to_change = 1;
- break;
- }
- old_secure_tcp = sysctl_ip_vs_secure_tcp;
- if (to_change >= 0)
- ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1);
- write_unlock(&__ip_vs_securetcp_lock);
-
- local_bh_enable();
-}
-
-
-/*
- * Timer for checking the defense
- */
-#define DEFENSE_TIMER_PERIOD 1*HZ
-static void defense_work_handler(struct work_struct *work);
-static DECLARE_DELAYED_WORK(defense_work, defense_work_handler);
-
-static void defense_work_handler(struct work_struct *work)
-{
- update_defense_level();
- if (atomic_read(&ip_vs_dropentry))
- ip_vs_random_dropentry();
-
- schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
-}
-
-int
-ip_vs_use_count_inc(void)
-{
- return try_module_get(THIS_MODULE);
-}
-
-void
-ip_vs_use_count_dec(void)
-{
- module_put(THIS_MODULE);
-}
-
-
-/*
- * Hash table: for virtual service lookups
- */
-#define IP_VS_SVC_TAB_BITS 8
-#define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
-#define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
-
-/* the service table hashed by <protocol, addr, port> */
-static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
-/* the service table hashed by fwmark */
-static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
-
-/*
- * Hash table: for real service lookups
- */
-#define IP_VS_RTAB_BITS 4
-#define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
-#define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
-
-static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE];
-
-/*
- * Trash for destinations
- */
-static LIST_HEAD(ip_vs_dest_trash);
-
-/*
- * FTP & NULL virtual service counters
- */
-static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0);
-static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0);
-
-
-/*
- * Returns hash value for virtual service
- */
-static __inline__ unsigned
-ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr,
- __be16 port)
-{
- register unsigned porth = ntohs(port);
- __be32 addr_fold = addr->ip;
-
-#ifdef CONFIG_IP_VS_IPV6
- if (af == AF_INET6)
- addr_fold = addr->ip6[0]^addr->ip6[1]^
- addr->ip6[2]^addr->ip6[3];
-#endif
-
- return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
- & IP_VS_SVC_TAB_MASK;
-}
-
-/*
- * Returns hash value of fwmark for virtual service lookup
- */
-static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark)
-{
- return fwmark & IP_VS_SVC_TAB_MASK;
-}
-
-/*
- * Hashes a service in the ip_vs_svc_table by <proto,addr,port>
- * or in the ip_vs_svc_fwm_table by fwmark.
- * Should be called with locked tables.
- */
-static int ip_vs_svc_hash(struct ip_vs_service *svc)
-{
- unsigned hash;
-
- if (svc->flags & IP_VS_SVC_F_HASHED) {
- IP_VS_ERR("ip_vs_svc_hash(): request for already hashed, "
- "called from %p\n", __builtin_return_address(0));
- return 0;
- }
-
- if (svc->fwmark == 0) {
- /*
- * Hash it by <protocol,addr,port> in ip_vs_svc_table
- */
- hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr,
- svc->port);
- list_add(&svc->s_list, &ip_vs_svc_table[hash]);
- } else {
- /*
- * Hash it by fwmark in ip_vs_svc_fwm_table
- */
- hash = ip_vs_svc_fwm_hashkey(svc->fwmark);
- list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
- }
-
- svc->flags |= IP_VS_SVC_F_HASHED;
- /* increase its refcnt because it is referenced by the svc table */
- atomic_inc(&svc->refcnt);
- return 1;
-}
-
-
-/*
- * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table.
- * Should be called with locked tables.
- */
-static int ip_vs_svc_unhash(struct ip_vs_service *svc)
-{
- if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
- IP_VS_ERR("ip_vs_svc_unhash(): request for unhash flagged, "
- "called from %p\n", __builtin_return_address(0));
- return 0;
- }
-
- if (svc->fwmark == 0) {
- /* Remove it from the ip_vs_svc_table table */
- list_del(&svc->s_list);
- } else {
- /* Remove it from the ip_vs_svc_fwm_table table */
- list_del(&svc->f_list);
- }
-
- svc->flags &= ~IP_VS_SVC_F_HASHED;
- atomic_dec(&svc->refcnt);
- return 1;
-}
-
-
-/*
- * Get service by {proto,addr,port} in the service table.
- */
-static inline struct ip_vs_service *
-__ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr,
- __be16 vport)
-{
- unsigned hash;
- struct ip_vs_service *svc;
-
- /* Check for "full" addressed entries */
- hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport);
-
- list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){
- if ((svc->af == af)
- && ip_vs_addr_equal(af, &svc->addr, vaddr)
- && (svc->port == vport)
- && (svc->protocol == protocol)) {
- /* HIT */
- atomic_inc(&svc->usecnt);
- return svc;
- }
- }
-
- return NULL;
-}
-
-
-/*
- * Get service by {fwmark} in the service table.
- */
-static inline struct ip_vs_service *
-__ip_vs_svc_fwm_get(int af, __u32 fwmark)
-{
- unsigned hash;
- struct ip_vs_service *svc;
-
- /* Check for fwmark addressed entries */
- hash = ip_vs_svc_fwm_hashkey(fwmark);
-
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
- if (svc->fwmark == fwmark && svc->af == af) {
- /* HIT */
- atomic_inc(&svc->usecnt);
- return svc;
- }
- }
-
- return NULL;
-}
-
-struct ip_vs_service *
-ip_vs_service_get(int af, __u32 fwmark, __u16 protocol,
- const union nf_inet_addr *vaddr, __be16 vport)
-{
- struct ip_vs_service *svc;
-
- read_lock(&__ip_vs_svc_lock);
-
- /*
- * Check the table hashed by fwmark first
- */
- if (fwmark && (svc = __ip_vs_svc_fwm_get(af, fwmark)))
- goto out;
-
- /*
- * Check the table hashed by <protocol,addr,port>
- * for "full" addressed entries
- */
- svc = __ip_vs_service_get(af, protocol, vaddr, vport);
-
- if (svc == NULL
- && protocol == IPPROTO_TCP
- && atomic_read(&ip_vs_ftpsvc_counter)
- && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
- /*
- * Check if ftp service entry exists, the packet
- * might belong to FTP data connections.
- */
- svc = __ip_vs_service_get(af, protocol, vaddr, FTPPORT);
- }
-
- if (svc == NULL
- && atomic_read(&ip_vs_nullsvc_counter)) {
- /*
- * Check if the catch-all port (port zero) exists
- */
- svc = __ip_vs_service_get(af, protocol, vaddr, 0);
- }
-
- out:
- read_unlock(&__ip_vs_svc_lock);
-
- IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
- fwmark, ip_vs_proto_name(protocol),
- IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
- svc ? "hit" : "not hit");
-
- return svc;
-}
-
-
-static inline void
-__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
-{
- atomic_inc(&svc->refcnt);
- dest->svc = svc;
-}
-
-static inline void
-__ip_vs_unbind_svc(struct ip_vs_dest *dest)
-{
- struct ip_vs_service *svc = dest->svc;
-
- dest->svc = NULL;
- if (atomic_dec_and_test(&svc->refcnt))
- kfree(svc);
-}
-
-
-/*
- * Returns hash value for real service
- */
-static inline unsigned ip_vs_rs_hashkey(int af,
- const union nf_inet_addr *addr,
- __be16 port)
-{
- register unsigned porth = ntohs(port);
- __be32 addr_fold = addr->ip;
-
-#ifdef CONFIG_IP_VS_IPV6
- if (af == AF_INET6)
- addr_fold = addr->ip6[0]^addr->ip6[1]^
- addr->ip6[2]^addr->ip6[3];
-#endif
-
- return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
- & IP_VS_RTAB_MASK;
-}
-
-/*
- * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>.
- * should be called with locked tables.
- */
-static int ip_vs_rs_hash(struct ip_vs_dest *dest)
-{
- unsigned hash;
-
- if (!list_empty(&dest->d_list)) {
- return 0;
- }
-
- /*
- * Hash by proto,addr,port,
- * which are the parameters of the real service.
- */
- hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
-
- list_add(&dest->d_list, &ip_vs_rtable[hash]);
-
- return 1;
-}
-
-/*
- * UNhashes ip_vs_dest from ip_vs_rtable.
- * should be called with locked tables.
- */
-static int ip_vs_rs_unhash(struct ip_vs_dest *dest)
-{
- /*
- * Remove it from the ip_vs_rtable table.
- */
- if (!list_empty(&dest->d_list)) {
- list_del(&dest->d_list);
- INIT_LIST_HEAD(&dest->d_list);
- }
-
- return 1;
-}
-
-/*
- * Lookup real service by <proto,addr,port> in the real service table.
- */
-struct ip_vs_dest *
-ip_vs_lookup_real_service(int af, __u16 protocol,
- const union nf_inet_addr *daddr,
- __be16 dport)
-{
- unsigned hash;
- struct ip_vs_dest *dest;
-
- /*
- * Check for "full" addressed entries
- * Return the first found entry
- */
- hash = ip_vs_rs_hashkey(af, daddr, dport);
-
- read_lock(&__ip_vs_rs_lock);
- list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) {
- if ((dest->af == af)
- && ip_vs_addr_equal(af, &dest->addr, daddr)
- && (dest->port == dport)
- && ((dest->protocol == protocol) ||
- dest->vfwmark)) {
- /* HIT */
- read_unlock(&__ip_vs_rs_lock);
- return dest;
- }
- }
- read_unlock(&__ip_vs_rs_lock);
-
- return NULL;
-}
-
-/*
- * Lookup destination by {addr,port} in the given service
- */
-static struct ip_vs_dest *
-ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
- __be16 dport)
-{
- struct ip_vs_dest *dest;
-
- /*
- * Find the destination for the given service
- */
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if ((dest->af == svc->af)
- && ip_vs_addr_equal(svc->af, &dest->addr, daddr)
- && (dest->port == dport)) {
- /* HIT */
- return dest;
- }
- }
-
- return NULL;
-}
-
-/*
- * Find destination by {daddr,dport,vaddr,protocol}
- * Cretaed to be used in ip_vs_process_message() in
- * the backup synchronization daemon. It finds the
- * destination to be bound to the received connection
- * on the backup.
- *
- * ip_vs_lookup_real_service() looked promissing, but
- * seems not working as expected.
- */
-struct ip_vs_dest *ip_vs_find_dest(int af, const union nf_inet_addr *daddr,
- __be16 dport,
- const union nf_inet_addr *vaddr,
- __be16 vport, __u16 protocol)
-{
- struct ip_vs_dest *dest;
- struct ip_vs_service *svc;
-
- svc = ip_vs_service_get(af, 0, protocol, vaddr, vport);
- if (!svc)
- return NULL;
- dest = ip_vs_lookup_dest(svc, daddr, dport);
- if (dest)
- atomic_inc(&dest->refcnt);
- ip_vs_service_put(svc);
- return dest;
-}
-
-/*
- * Lookup dest by {svc,addr,port} in the destination trash.
- * The destination trash is used to hold the destinations that are removed
- * from the service table but are still referenced by some conn entries.
- * The reason to add the destination trash is when the dest is temporary
- * down (either by administrator or by monitor program), the dest can be
- * picked back from the trash, the remaining connections to the dest can
- * continue, and the counting information of the dest is also useful for
- * scheduling.
- */
-static struct ip_vs_dest *
-ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
- __be16 dport)
-{
- struct ip_vs_dest *dest, *nxt;
-
- /*
- * Find the destination in trash
- */
- list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
- IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
- "dest->refcnt=%d\n",
- dest->vfwmark,
- IP_VS_DBG_ADDR(svc->af, &dest->addr),
- ntohs(dest->port),
- atomic_read(&dest->refcnt));
- if (dest->af == svc->af &&
- ip_vs_addr_equal(svc->af, &dest->addr, daddr) &&
- dest->port == dport &&
- dest->vfwmark == svc->fwmark &&
- dest->protocol == svc->protocol &&
- (svc->fwmark ||
- (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
- dest->vport == svc->port))) {
- /* HIT */
- return dest;
- }
-
- /*
- * Try to purge the destination from trash if not referenced
- */
- if (atomic_read(&dest->refcnt) == 1) {
- IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u "
- "from trash\n",
- dest->vfwmark,
- IP_VS_DBG_ADDR(svc->af, &dest->addr),
- ntohs(dest->port));
- list_del(&dest->n_list);
- ip_vs_dst_reset(dest);
- __ip_vs_unbind_svc(dest);
- kfree(dest);
- }
- }
-
- return NULL;
-}
-
-
-/*
- * Clean up all the destinations in the trash
- * Called by the ip_vs_control_cleanup()
- *
- * When the ip_vs_control_clearup is activated by ipvs module exit,
- * the service tables must have been flushed and all the connections
- * are expired, and the refcnt of each destination in the trash must
- * be 1, so we simply release them here.
- */
-static void ip_vs_trash_cleanup(void)
-{
- struct ip_vs_dest *dest, *nxt;
-
- list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
- list_del(&dest->n_list);
- ip_vs_dst_reset(dest);
- __ip_vs_unbind_svc(dest);
- kfree(dest);
- }
-}
-
-
-static void
-ip_vs_zero_stats(struct ip_vs_stats *stats)
-{
- spin_lock_bh(&stats->lock);
-
- memset(&stats->ustats, 0, sizeof(stats->ustats));
- ip_vs_zero_estimator(stats);
-
- spin_unlock_bh(&stats->lock);
-}
-
-/*
- * Update a destination in the given service
- */
-static void
-__ip_vs_update_dest(struct ip_vs_service *svc,
- struct ip_vs_dest *dest, struct ip_vs_dest_user_kern *udest)
-{
- int conn_flags;
-
- /* set the weight and the flags */
- atomic_set(&dest->weight, udest->weight);
- conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE;
-
- /* check if local node and update the flags */
-#ifdef CONFIG_IP_VS_IPV6
- if (svc->af == AF_INET6) {
- if (__ip_vs_addr_is_local_v6(&udest->addr.in6)) {
- conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
- | IP_VS_CONN_F_LOCALNODE;
- }
- } else
-#endif
- if (inet_addr_type(&init_net, udest->addr.ip) == RTN_LOCAL) {
- conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
- | IP_VS_CONN_F_LOCALNODE;
- }
-
- /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
- if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) {
- conn_flags |= IP_VS_CONN_F_NOOUTPUT;
- } else {
- /*
- * Put the real service in ip_vs_rtable if not present.
- * For now only for NAT!
- */
- write_lock_bh(&__ip_vs_rs_lock);
- ip_vs_rs_hash(dest);
- write_unlock_bh(&__ip_vs_rs_lock);
- }
- atomic_set(&dest->conn_flags, conn_flags);
-
- /* bind the service */
- if (!dest->svc) {
- __ip_vs_bind_svc(dest, svc);
- } else {
- if (dest->svc != svc) {
- __ip_vs_unbind_svc(dest);
- ip_vs_zero_stats(&dest->stats);
- __ip_vs_bind_svc(dest, svc);
- }
- }
-
- /* set the dest status flags */
- dest->flags |= IP_VS_DEST_F_AVAILABLE;
-
- if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
- dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
- dest->u_threshold = udest->u_threshold;
- dest->l_threshold = udest->l_threshold;
-}
-
-
-/*
- * Create a destination for the given service
- */
-static int
-ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
- struct ip_vs_dest **dest_p)
-{
- struct ip_vs_dest *dest;
- unsigned atype;
-
- EnterFunction(2);
-
-#ifdef CONFIG_IP_VS_IPV6
- if (svc->af == AF_INET6) {
- atype = ipv6_addr_type(&udest->addr.in6);
- if ((!(atype & IPV6_ADDR_UNICAST) ||
- atype & IPV6_ADDR_LINKLOCAL) &&
- !__ip_vs_addr_is_local_v6(&udest->addr.in6))
- return -EINVAL;
- } else
-#endif
- {
- atype = inet_addr_type(&init_net, udest->addr.ip);
- if (atype != RTN_LOCAL && atype != RTN_UNICAST)
- return -EINVAL;
- }
-
- dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC);
- if (dest == NULL) {
- IP_VS_ERR("ip_vs_new_dest: kmalloc failed.\n");
- return -ENOMEM;
- }
-
- dest->af = svc->af;
- dest->protocol = svc->protocol;
- dest->vaddr = svc->addr;
- dest->vport = svc->port;
- dest->vfwmark = svc->fwmark;
- ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr);
- dest->port = udest->port;
-
- atomic_set(&dest->activeconns, 0);
- atomic_set(&dest->inactconns, 0);
- atomic_set(&dest->persistconns, 0);
- atomic_set(&dest->refcnt, 0);
-
- INIT_LIST_HEAD(&dest->d_list);
- spin_lock_init(&dest->dst_lock);
- spin_lock_init(&dest->stats.lock);
- __ip_vs_update_dest(svc, dest, udest);
- ip_vs_new_estimator(&dest->stats);
-
- *dest_p = dest;
-
- LeaveFunction(2);
- return 0;
-}
-
-
-/*
- * Add a destination into an existing service
- */
-static int
-ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
-{
- struct ip_vs_dest *dest;
- union nf_inet_addr daddr;
- __be16 dport = udest->port;
- int ret;
-
- EnterFunction(2);
-
- if (udest->weight < 0) {
- IP_VS_ERR("ip_vs_add_dest(): server weight less than zero\n");
- return -ERANGE;
- }
-
- if (udest->l_threshold > udest->u_threshold) {
- IP_VS_ERR("ip_vs_add_dest(): lower threshold is higher than "
- "upper threshold\n");
- return -ERANGE;
- }
-
- ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
-
- /*
- * Check if the dest already exists in the list
- */
- dest = ip_vs_lookup_dest(svc, &daddr, dport);
-
- if (dest != NULL) {
- IP_VS_DBG(1, "ip_vs_add_dest(): dest already exists\n");
- return -EEXIST;
- }
-
- /*
- * Check if the dest already exists in the trash and
- * is from the same service
- */
- dest = ip_vs_trash_get_dest(svc, &daddr, dport);
-
- if (dest != NULL) {
- IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
- "dest->refcnt=%d, service %u/%s:%u\n",
- IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport),
- atomic_read(&dest->refcnt),
- dest->vfwmark,
- IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
- ntohs(dest->vport));
-
- __ip_vs_update_dest(svc, dest, udest);
-
- /*
- * Get the destination from the trash
- */
- list_del(&dest->n_list);
-
- ip_vs_new_estimator(&dest->stats);
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /*
- * Wait until all other svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- list_add(&dest->n_list, &svc->destinations);
- svc->num_dests++;
-
- /* call the update_service function of its scheduler */
- if (svc->scheduler->update_service)
- svc->scheduler->update_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
- return 0;
- }
-
- /*
- * Allocate and initialize the dest structure
- */
- ret = ip_vs_new_dest(svc, udest, &dest);
- if (ret) {
- return ret;
- }
-
- /*
- * Add the dest entry into the list
- */
- atomic_inc(&dest->refcnt);
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /*
- * Wait until all other svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- list_add(&dest->n_list, &svc->destinations);
- svc->num_dests++;
-
- /* call the update_service function of its scheduler */
- if (svc->scheduler->update_service)
- svc->scheduler->update_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
- LeaveFunction(2);
-
- return 0;
-}
-
-
-/*
- * Edit a destination in the given service
- */
-static int
-ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
-{
- struct ip_vs_dest *dest;
- union nf_inet_addr daddr;
- __be16 dport = udest->port;
-
- EnterFunction(2);
-
- if (udest->weight < 0) {
- IP_VS_ERR("ip_vs_edit_dest(): server weight less than zero\n");
- return -ERANGE;
- }
-
- if (udest->l_threshold > udest->u_threshold) {
- IP_VS_ERR("ip_vs_edit_dest(): lower threshold is higher than "
- "upper threshold\n");
- return -ERANGE;
- }
-
- ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
-
- /*
- * Lookup the destination list
- */
- dest = ip_vs_lookup_dest(svc, &daddr, dport);
-
- if (dest == NULL) {
- IP_VS_DBG(1, "ip_vs_edit_dest(): dest doesn't exist\n");
- return -ENOENT;
- }
-
- __ip_vs_update_dest(svc, dest, udest);
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /* Wait until all other svc users go away */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- /* call the update_service, because server weight may be changed */
- if (svc->scheduler->update_service)
- svc->scheduler->update_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
- LeaveFunction(2);
-
- return 0;
-}
-
-
-/*
- * Delete a destination (must be already unlinked from the service)
- */
-static void __ip_vs_del_dest(struct ip_vs_dest *dest)
-{
- ip_vs_kill_estimator(&dest->stats);
-
- /*
- * Remove it from the d-linked list with the real services.
- */
- write_lock_bh(&__ip_vs_rs_lock);
- ip_vs_rs_unhash(dest);
- write_unlock_bh(&__ip_vs_rs_lock);
-
- /*
- * Decrease the refcnt of the dest, and free the dest
- * if nobody refers to it (refcnt=0). Otherwise, throw
- * the destination into the trash.
- */
- if (atomic_dec_and_test(&dest->refcnt)) {
- ip_vs_dst_reset(dest);
- /* simply decrease svc->refcnt here, let the caller check
- and release the service if nobody refers to it.
- Only user context can release destination and service,
- and only one user context can update virtual service at a
- time, so the operation here is OK */
- atomic_dec(&dest->svc->refcnt);
- kfree(dest);
- } else {
- IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, "
- "dest->refcnt=%d\n",
- IP_VS_DBG_ADDR(dest->af, &dest->addr),
- ntohs(dest->port),
- atomic_read(&dest->refcnt));
- list_add(&dest->n_list, &ip_vs_dest_trash);
- atomic_inc(&dest->refcnt);
- }
-}
-
-
-/*
- * Unlink a destination from the given service
- */
-static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
- struct ip_vs_dest *dest,
- int svcupd)
-{
- dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
-
- /*
- * Remove it from the d-linked destination list.
- */
- list_del(&dest->n_list);
- svc->num_dests--;
-
- /*
- * Call the update_service function of its scheduler
- */
- if (svcupd && svc->scheduler->update_service)
- svc->scheduler->update_service(svc);
-}
-
-
-/*
- * Delete a destination server in the given service
- */
-static int
-ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
-{
- struct ip_vs_dest *dest;
- __be16 dport = udest->port;
-
- EnterFunction(2);
-
- dest = ip_vs_lookup_dest(svc, &udest->addr, dport);
-
- if (dest == NULL) {
- IP_VS_DBG(1, "ip_vs_del_dest(): destination not found!\n");
- return -ENOENT;
- }
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /*
- * Wait until all other svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- /*
- * Unlink dest from the service
- */
- __ip_vs_unlink_dest(svc, dest, 1);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
- /*
- * Delete the destination
- */
- __ip_vs_del_dest(dest);
-
- LeaveFunction(2);
-
- return 0;
-}
-
-
-/*
- * Add a service into the service hash table
- */
-static int
-ip_vs_add_service(struct ip_vs_service_user_kern *u,
- struct ip_vs_service **svc_p)
-{
- int ret = 0;
- struct ip_vs_scheduler *sched = NULL;
- struct ip_vs_service *svc = NULL;
-
- /* increase the module use count */
- ip_vs_use_count_inc();
-
- /* Lookup the scheduler by 'u->sched_name' */
- sched = ip_vs_scheduler_get(u->sched_name);
- if (sched == NULL) {
- IP_VS_INFO("Scheduler module ip_vs_%s not found\n",
- u->sched_name);
- ret = -ENOENT;
- goto out_mod_dec;
- }
-
-#ifdef CONFIG_IP_VS_IPV6
- if (u->af == AF_INET6) {
- if (!sched->supports_ipv6) {
- ret = -EAFNOSUPPORT;
- goto out_err;
- }
- if ((u->netmask < 1) || (u->netmask > 128)) {
- ret = -EINVAL;
- goto out_err;
- }
- }
-#endif
-
- svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC);
- if (svc == NULL) {
- IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n");
- ret = -ENOMEM;
- goto out_err;
- }
-
- /* I'm the first user of the service */
- atomic_set(&svc->usecnt, 1);
- atomic_set(&svc->refcnt, 0);
-
- svc->af = u->af;
- svc->protocol = u->protocol;
- ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
- svc->port = u->port;
- svc->fwmark = u->fwmark;
- svc->flags = u->flags;
- svc->timeout = u->timeout * HZ;
- svc->netmask = u->netmask;
-
- INIT_LIST_HEAD(&svc->destinations);
- rwlock_init(&svc->sched_lock);
- spin_lock_init(&svc->stats.lock);
-
- /* Bind the scheduler */
- ret = ip_vs_bind_scheduler(svc, sched);
- if (ret)
- goto out_err;
- sched = NULL;
-
- /* Update the virtual service counters */
- if (svc->port == FTPPORT)
- atomic_inc(&ip_vs_ftpsvc_counter);
- else if (svc->port == 0)
- atomic_inc(&ip_vs_nullsvc_counter);
-
- ip_vs_new_estimator(&svc->stats);
-
- /* Count only IPv4 services for old get/setsockopt interface */
- if (svc->af == AF_INET)
- ip_vs_num_services++;
-
- /* Hash the service into the service table */
- write_lock_bh(&__ip_vs_svc_lock);
- ip_vs_svc_hash(svc);
- write_unlock_bh(&__ip_vs_svc_lock);
-
- *svc_p = svc;
- return 0;
-
- out_err:
- if (svc != NULL) {
- if (svc->scheduler)
- ip_vs_unbind_scheduler(svc);
- if (svc->inc) {
- local_bh_disable();
- ip_vs_app_inc_put(svc->inc);
- local_bh_enable();
- }
- kfree(svc);
- }
- ip_vs_scheduler_put(sched);
-
- out_mod_dec:
- /* decrease the module use count */
- ip_vs_use_count_dec();
-
- return ret;
-}
-
-
-/*
- * Edit a service and bind it with a new scheduler
- */
-static int
-ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
-{
- struct ip_vs_scheduler *sched, *old_sched;
- int ret = 0;
-
- /*
- * Lookup the scheduler, by 'u->sched_name'
- */
- sched = ip_vs_scheduler_get(u->sched_name);
- if (sched == NULL) {
- IP_VS_INFO("Scheduler module ip_vs_%s not found\n",
- u->sched_name);
- return -ENOENT;
- }
- old_sched = sched;
-
-#ifdef CONFIG_IP_VS_IPV6
- if (u->af == AF_INET6) {
- if (!sched->supports_ipv6) {
- ret = -EAFNOSUPPORT;
- goto out;
- }
- if ((u->netmask < 1) || (u->netmask > 128)) {
- ret = -EINVAL;
- goto out;
- }
- }
-#endif
-
- write_lock_bh(&__ip_vs_svc_lock);
-
- /*
- * Wait until all other svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- /*
- * Set the flags and timeout value
- */
- svc->flags = u->flags | IP_VS_SVC_F_HASHED;
- svc->timeout = u->timeout * HZ;
- svc->netmask = u->netmask;
-
- old_sched = svc->scheduler;
- if (sched != old_sched) {
- /*
- * Unbind the old scheduler
- */
- if ((ret = ip_vs_unbind_scheduler(svc))) {
- old_sched = sched;
- goto out_unlock;
- }
-
- /*
- * Bind the new scheduler
- */
- if ((ret = ip_vs_bind_scheduler(svc, sched))) {
- /*
- * If ip_vs_bind_scheduler fails, restore the old
- * scheduler.
- * The main reason of failure is out of memory.
- *
- * The question is if the old scheduler can be
- * restored all the time. TODO: if it cannot be
- * restored some time, we must delete the service,
- * otherwise the system may crash.
- */
- ip_vs_bind_scheduler(svc, old_sched);
- old_sched = sched;
- goto out_unlock;
- }
- }
-
- out_unlock:
- write_unlock_bh(&__ip_vs_svc_lock);
- out:
-
- if (old_sched)
- ip_vs_scheduler_put(old_sched);
-
- return ret;
-}
-
-
-/*
- * Delete a service from the service list
- * - The service must be unlinked, unlocked and not referenced!
- * - We are called under _bh lock
- */
-static void __ip_vs_del_service(struct ip_vs_service *svc)
-{
- struct ip_vs_dest *dest, *nxt;
- struct ip_vs_scheduler *old_sched;
-
- /* Count only IPv4 services for old get/setsockopt interface */
- if (svc->af == AF_INET)
- ip_vs_num_services--;
-
- ip_vs_kill_estimator(&svc->stats);
-
- /* Unbind scheduler */
- old_sched = svc->scheduler;
- ip_vs_unbind_scheduler(svc);
- if (old_sched)
- ip_vs_scheduler_put(old_sched);
-
- /* Unbind app inc */
- if (svc->inc) {
- ip_vs_app_inc_put(svc->inc);
- svc->inc = NULL;
- }
-
- /*
- * Unlink the whole destination list
- */
- list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
- __ip_vs_unlink_dest(svc, dest, 0);
- __ip_vs_del_dest(dest);
- }
-
- /*
- * Update the virtual service counters
- */
- if (svc->port == FTPPORT)
- atomic_dec(&ip_vs_ftpsvc_counter);
- else if (svc->port == 0)
- atomic_dec(&ip_vs_nullsvc_counter);
-
- /*
- * Free the service if nobody refers to it
- */
- if (atomic_read(&svc->refcnt) == 0)
- kfree(svc);
-
- /* decrease the module use count */
- ip_vs_use_count_dec();
-}
-
-/*
- * Delete a service from the service list
- */
-static int ip_vs_del_service(struct ip_vs_service *svc)
-{
- if (svc == NULL)
- return -EEXIST;
-
- /*
- * Unhash it from the service table
- */
- write_lock_bh(&__ip_vs_svc_lock);
-
- ip_vs_svc_unhash(svc);
-
- /*
- * Wait until all the svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
-
- __ip_vs_del_service(svc);
-
- write_unlock_bh(&__ip_vs_svc_lock);
-
- return 0;
-}
-
-
-/*
- * Flush all the virtual services
- */
-static int ip_vs_flush(void)
-{
- int idx;
- struct ip_vs_service *svc, *nxt;
-
- /*
- * Flush the service table hashed by <protocol,addr,port>
- */
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) {
- write_lock_bh(&__ip_vs_svc_lock);
- ip_vs_svc_unhash(svc);
- /*
- * Wait until all the svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
- __ip_vs_del_service(svc);
- write_unlock_bh(&__ip_vs_svc_lock);
- }
- }
-
- /*
- * Flush the service table hashed by fwmark
- */
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry_safe(svc, nxt,
- &ip_vs_svc_fwm_table[idx], f_list) {
- write_lock_bh(&__ip_vs_svc_lock);
- ip_vs_svc_unhash(svc);
- /*
- * Wait until all the svc users go away.
- */
- IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
- __ip_vs_del_service(svc);
- write_unlock_bh(&__ip_vs_svc_lock);
- }
- }
-
- return 0;
-}
-
-
-/*
- * Zero counters in a service or all services
- */
-static int ip_vs_zero_service(struct ip_vs_service *svc)
-{
- struct ip_vs_dest *dest;
-
- write_lock_bh(&__ip_vs_svc_lock);
- list_for_each_entry(dest, &svc->destinations, n_list) {
- ip_vs_zero_stats(&dest->stats);
- }
- ip_vs_zero_stats(&svc->stats);
- write_unlock_bh(&__ip_vs_svc_lock);
- return 0;
-}
-
-static int ip_vs_zero_all(void)
-{
- int idx;
- struct ip_vs_service *svc;
-
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
- ip_vs_zero_service(svc);
- }
- }
-
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
- ip_vs_zero_service(svc);
- }
- }
-
- ip_vs_zero_stats(&ip_vs_stats);
- return 0;
-}
-
-
-static int
-proc_do_defense_mode(ctl_table *table, int write, struct file * filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- int *valp = table->data;
- int val = *valp;
- int rc;
-
- rc = proc_dointvec(table, write, filp, buffer, lenp, ppos);
- if (write && (*valp != val)) {
- if ((*valp < 0) || (*valp > 3)) {
- /* Restore the correct value */
- *valp = val;
- } else {
- update_defense_level();
- }
- }
- return rc;
-}
-
-
-static int
-proc_do_sync_threshold(ctl_table *table, int write, struct file *filp,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- int *valp = table->data;
- int val[2];
- int rc;
-
- /* backup the value first */
- memcpy(val, valp, sizeof(val));
-
- rc = proc_dointvec(table, write, filp, buffer, lenp, ppos);
- if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) {
- /* Restore the correct value */
- memcpy(valp, val, sizeof(val));
- }
- return rc;
-}
-
-
-/*
- * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
- */
-
-static struct ctl_table vs_vars[] = {
- {
- .procname = "amemthresh",
- .data = &sysctl_ip_vs_amemthresh,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
-#ifdef CONFIG_IP_VS_DEBUG
- {
- .procname = "debug_level",
- .data = &sysctl_ip_vs_debug_level,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
-#endif
- {
- .procname = "am_droprate",
- .data = &sysctl_ip_vs_am_droprate,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- {
- .procname = "drop_entry",
- .data = &sysctl_ip_vs_drop_entry,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_do_defense_mode,
- },
- {
- .procname = "drop_packet",
- .data = &sysctl_ip_vs_drop_packet,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_do_defense_mode,
- },
- {
- .procname = "secure_tcp",
- .data = &sysctl_ip_vs_secure_tcp,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_do_defense_mode,
- },
-#if 0
- {
- .procname = "timeout_established",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_synsent",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_synrecv",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_finwait",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_timewait",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_close",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_closewait",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_lastack",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_listen",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_synack",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_udp",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .procname = "timeout_icmp",
- .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP],
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
-#endif
- {
- .procname = "cache_bypass",
- .data = &sysctl_ip_vs_cache_bypass,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- {
- .procname = "expire_nodest_conn",
- .data = &sysctl_ip_vs_expire_nodest_conn,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- {
- .procname = "expire_quiescent_template",
- .data = &sysctl_ip_vs_expire_quiescent_template,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- {
- .procname = "sync_threshold",
- .data = &sysctl_ip_vs_sync_threshold,
- .maxlen = sizeof(sysctl_ip_vs_sync_threshold),
- .mode = 0644,
- .proc_handler = &proc_do_sync_threshold,
- },
- {
- .procname = "nat_icmp_send",
- .data = &sysctl_ip_vs_nat_icmp_send,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = &proc_dointvec,
- },
- { .ctl_name = 0 }
-};
-
-const struct ctl_path net_vs_ctl_path[] = {
- { .procname = "net", .ctl_name = CTL_NET, },
- { .procname = "ipv4", .ctl_name = NET_IPV4, },
- { .procname = "vs", },
- { }
-};
-EXPORT_SYMBOL_GPL(net_vs_ctl_path);
-
-static struct ctl_table_header * sysctl_header;
-
-#ifdef CONFIG_PROC_FS
-
-struct ip_vs_iter {
- struct list_head *table;
- int bucket;
-};
-
-/*
- * Write the contents of the VS rule table to a PROCfs file.
- * (It is kept just for backward compatibility)
- */
-static inline const char *ip_vs_fwd_name(unsigned flags)
-{
- switch (flags & IP_VS_CONN_F_FWD_MASK) {
- case IP_VS_CONN_F_LOCALNODE:
- return "Local";
- case IP_VS_CONN_F_TUNNEL:
- return "Tunnel";
- case IP_VS_CONN_F_DROUTE:
- return "Route";
- default:
- return "Masq";
- }
-}
-
-
-/* Get the Nth entry in the two lists */
-static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
-{
- struct ip_vs_iter *iter = seq->private;
- int idx;
- struct ip_vs_service *svc;
-
- /* look in hash by protocol */
- for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
- if (pos-- == 0){
- iter->table = ip_vs_svc_table;
- iter->bucket = idx;
- return svc;
- }
- }
- }
-
- /* keep looking in fwmark */
- for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
- if (pos-- == 0) {
- iter->table = ip_vs_svc_fwm_table;
- iter->bucket = idx;
- return svc;
- }
- }
- }
-
- return NULL;
-}
-
-static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
-__acquires(__ip_vs_svc_lock)
-{
-
- read_lock_bh(&__ip_vs_svc_lock);
- return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
-}
-
-
-static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct list_head *e;
- struct ip_vs_iter *iter;
- struct ip_vs_service *svc;
-
- ++*pos;
- if (v == SEQ_START_TOKEN)
- return ip_vs_info_array(seq,0);
-
- svc = v;
- iter = seq->private;
-
- if (iter->table == ip_vs_svc_table) {
- /* next service in table hashed by protocol */
- if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket])
- return list_entry(e, struct ip_vs_service, s_list);
-
-
- while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
- list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket],
- s_list) {
- return svc;
- }
- }
-
- iter->table = ip_vs_svc_fwm_table;
- iter->bucket = -1;
- goto scan_fwmark;
- }
-
- /* next service in hashed by fwmark */
- if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket])
- return list_entry(e, struct ip_vs_service, f_list);
-
- scan_fwmark:
- while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket],
- f_list)
- return svc;
- }
-
- return NULL;
-}
-
-static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
-__releases(__ip_vs_svc_lock)
-{
- read_unlock_bh(&__ip_vs_svc_lock);
-}
-
-
-static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN) {
- seq_printf(seq,
- "IP Virtual Server version %d.%d.%d (size=%d)\n",
- NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE);
- seq_puts(seq,
- "Prot LocalAddress:Port Scheduler Flags\n");
- seq_puts(seq,
- " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
- } else {
- const struct ip_vs_service *svc = v;
- const struct ip_vs_iter *iter = seq->private;
- const struct ip_vs_dest *dest;
-
- if (iter->table == ip_vs_svc_table) {
-#ifdef CONFIG_IP_VS_IPV6
- if (svc->af == AF_INET6)
- seq_printf(seq, "%s [" NIP6_FMT "]:%04X %s ",
- ip_vs_proto_name(svc->protocol),
- NIP6(svc->addr.in6),
- ntohs(svc->port),
- svc->scheduler->name);
- else
-#endif
- seq_printf(seq, "%s %08X:%04X %s ",
- ip_vs_proto_name(svc->protocol),
- ntohl(svc->addr.ip),
- ntohs(svc->port),
- svc->scheduler->name);
- } else {
- seq_printf(seq, "FWM %08X %s ",
- svc->fwmark, svc->scheduler->name);
- }
-
- if (svc->flags & IP_VS_SVC_F_PERSISTENT)
- seq_printf(seq, "persistent %d %08X\n",
- svc->timeout,
- ntohl(svc->netmask));
- else
- seq_putc(seq, '\n');
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
-#ifdef CONFIG_IP_VS_IPV6
- if (dest->af == AF_INET6)
- seq_printf(seq,
- " -> [" NIP6_FMT "]:%04X"
- " %-7s %-6d %-10d %-10d\n",
- NIP6(dest->addr.in6),
- ntohs(dest->port),
- ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
- atomic_read(&dest->weight),
- atomic_read(&dest->activeconns),
- atomic_read(&dest->inactconns));
- else
-#endif
- seq_printf(seq,
- " -> %08X:%04X "
- "%-7s %-6d %-10d %-10d\n",
- ntohl(dest->addr.ip),
- ntohs(dest->port),
- ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
- atomic_read(&dest->weight),
- atomic_read(&dest->activeconns),
- atomic_read(&dest->inactconns));
-
- }
- }
- return 0;
-}
-
-static const struct seq_operations ip_vs_info_seq_ops = {
- .start = ip_vs_info_seq_start,
- .next = ip_vs_info_seq_next,
- .stop = ip_vs_info_seq_stop,
- .show = ip_vs_info_seq_show,
-};
-
-static int ip_vs_info_open(struct inode *inode, struct file *file)
-{
- return seq_open_private(file, &ip_vs_info_seq_ops,
- sizeof(struct ip_vs_iter));
-}
-
-static const struct file_operations ip_vs_info_fops = {
- .owner = THIS_MODULE,
- .open = ip_vs_info_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release_private,
-};
-
-#endif
-
-struct ip_vs_stats ip_vs_stats = {
- .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock),
-};
-
-#ifdef CONFIG_PROC_FS
-static int ip_vs_stats_show(struct seq_file *seq, void *v)
-{
-
-/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
- seq_puts(seq,
- " Total Incoming Outgoing Incoming Outgoing\n");
- seq_printf(seq,
- " Conns Packets Packets Bytes Bytes\n");
-
- spin_lock_bh(&ip_vs_stats.lock);
- seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.ustats.conns,
- ip_vs_stats.ustats.inpkts, ip_vs_stats.ustats.outpkts,
- (unsigned long long) ip_vs_stats.ustats.inbytes,
- (unsigned long long) ip_vs_stats.ustats.outbytes);
-
-/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
- seq_puts(seq,
- " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
- seq_printf(seq,"%8X %8X %8X %16X %16X\n",
- ip_vs_stats.ustats.cps,
- ip_vs_stats.ustats.inpps,
- ip_vs_stats.ustats.outpps,
- ip_vs_stats.ustats.inbps,
- ip_vs_stats.ustats.outbps);
- spin_unlock_bh(&ip_vs_stats.lock);
-
- return 0;
-}
-
-static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ip_vs_stats_show, NULL);
-}
-
-static const struct file_operations ip_vs_stats_fops = {
- .owner = THIS_MODULE,
- .open = ip_vs_stats_seq_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-#endif
-
-/*
- * Set timeout values for tcp tcpfin udp in the timeout_table.
- */
-static int ip_vs_set_timeout(struct ip_vs_timeout_user *u)
-{
- IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
- u->tcp_timeout,
- u->tcp_fin_timeout,
- u->udp_timeout);
-
-#ifdef CONFIG_IP_VS_PROTO_TCP
- if (u->tcp_timeout) {
- ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED]
- = u->tcp_timeout * HZ;
- }
-
- if (u->tcp_fin_timeout) {
- ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT]
- = u->tcp_fin_timeout * HZ;
- }
-#endif
-
-#ifdef CONFIG_IP_VS_PROTO_UDP
- if (u->udp_timeout) {
- ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL]
- = u->udp_timeout * HZ;
- }
-#endif
- return 0;
-}
-
-
-#define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
-#define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
-#define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
- sizeof(struct ip_vs_dest_user))
-#define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
-#define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
-#define MAX_ARG_LEN SVCDEST_ARG_LEN
-
-static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
- [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
- [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
- [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
-};
-
-static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
- struct ip_vs_service_user *usvc_compat)
-{
- usvc->af = AF_INET;
- usvc->protocol = usvc_compat->protocol;
- usvc->addr.ip = usvc_compat->addr;
- usvc->port = usvc_compat->port;
- usvc->fwmark = usvc_compat->fwmark;
-
- /* Deep copy of sched_name is not needed here */
- usvc->sched_name = usvc_compat->sched_name;
-
- usvc->flags = usvc_compat->flags;
- usvc->timeout = usvc_compat->timeout;
- usvc->netmask = usvc_compat->netmask;
-}
-
-static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
- struct ip_vs_dest_user *udest_compat)
-{
- udest->addr.ip = udest_compat->addr;
- udest->port = udest_compat->port;
- udest->conn_flags = udest_compat->conn_flags;
- udest->weight = udest_compat->weight;
- udest->u_threshold = udest_compat->u_threshold;
- udest->l_threshold = udest_compat->l_threshold;
-}
-
-static int
-do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
-{
- int ret;
- unsigned char arg[MAX_ARG_LEN];
- struct ip_vs_service_user *usvc_compat;
- struct ip_vs_service_user_kern usvc;
- struct ip_vs_service *svc;
- struct ip_vs_dest_user *udest_compat;
- struct ip_vs_dest_user_kern udest;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- if (len != set_arglen[SET_CMDID(cmd)]) {
- IP_VS_ERR("set_ctl: len %u != %u\n",
- len, set_arglen[SET_CMDID(cmd)]);
- return -EINVAL;
- }
-
- if (copy_from_user(arg, user, len) != 0)
- return -EFAULT;
-
- /* increase the module use count */
- ip_vs_use_count_inc();
-
- if (mutex_lock_interruptible(&__ip_vs_mutex)) {
- ret = -ERESTARTSYS;
- goto out_dec;
- }
-
- if (cmd == IP_VS_SO_SET_FLUSH) {
- /* Flush the virtual service */
- ret = ip_vs_flush();
- goto out_unlock;
- } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
- /* Set timeout values for (tcp tcpfin udp) */
- ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg);
- goto out_unlock;
- } else if (cmd == IP_VS_SO_SET_STARTDAEMON) {
- struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
- ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid);
- goto out_unlock;
- } else if (cmd == IP_VS_SO_SET_STOPDAEMON) {
- struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
- ret = stop_sync_thread(dm->state);
- goto out_unlock;
- }
-
- usvc_compat = (struct ip_vs_service_user *)arg;
- udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
-
- /* We only use the new structs internally, so copy userspace compat
- * structs to extended internal versions */
- ip_vs_copy_usvc_compat(&usvc, usvc_compat);
- ip_vs_copy_udest_compat(&udest, udest_compat);
-
- if (cmd == IP_VS_SO_SET_ZERO) {
- /* if no service address is set, zero counters in all */
- if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
- ret = ip_vs_zero_all();
- goto out_unlock;
- }
- }
-
- /* Check for valid protocol: TCP or UDP, even for fwmark!=0 */
- if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP) {
- IP_VS_ERR("set_ctl: invalid protocol: %d %d.%d.%d.%d:%d %s\n",
- usvc.protocol, NIPQUAD(usvc.addr.ip),
- ntohs(usvc.port), usvc.sched_name);
- ret = -EFAULT;
- goto out_unlock;
- }
-
- /* Lookup the exact service by <protocol, addr, port> or fwmark */
- if (usvc.fwmark == 0)
- svc = __ip_vs_service_get(usvc.af, usvc.protocol,
- &usvc.addr, usvc.port);
- else
- svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
-
- if (cmd != IP_VS_SO_SET_ADD
- && (svc == NULL || svc->protocol != usvc.protocol)) {
- ret = -ESRCH;
- goto out_unlock;
- }
-
- switch (cmd) {
- case IP_VS_SO_SET_ADD:
- if (svc != NULL)
- ret = -EEXIST;
- else
- ret = ip_vs_add_service(&usvc, &svc);
- break;
- case IP_VS_SO_SET_EDIT:
- ret = ip_vs_edit_service(svc, &usvc);
- break;
- case IP_VS_SO_SET_DEL:
- ret = ip_vs_del_service(svc);
- if (!ret)
- goto out_unlock;
- break;
- case IP_VS_SO_SET_ZERO:
- ret = ip_vs_zero_service(svc);
- break;
- case IP_VS_SO_SET_ADDDEST:
- ret = ip_vs_add_dest(svc, &udest);
- break;
- case IP_VS_SO_SET_EDITDEST:
- ret = ip_vs_edit_dest(svc, &udest);
- break;
- case IP_VS_SO_SET_DELDEST:
- ret = ip_vs_del_dest(svc, &udest);
- break;
- default:
- ret = -EINVAL;
- }
-
- if (svc)
- ip_vs_service_put(svc);
-
- out_unlock:
- mutex_unlock(&__ip_vs_mutex);
- out_dec:
- /* decrease the module use count */
- ip_vs_use_count_dec();
-
- return ret;
-}
-
-
-static void
-ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
-{
- spin_lock_bh(&src->lock);
- memcpy(dst, &src->ustats, sizeof(*dst));
- spin_unlock_bh(&src->lock);
-}
-
-static void
-ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
-{
- dst->protocol = src->protocol;
- dst->addr = src->addr.ip;
- dst->port = src->port;
- dst->fwmark = src->fwmark;
- strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name));
- dst->flags = src->flags;
- dst->timeout = src->timeout / HZ;
- dst->netmask = src->netmask;
- dst->num_dests = src->num_dests;
- ip_vs_copy_stats(&dst->stats, &src->stats);
-}
-
-static inline int
-__ip_vs_get_service_entries(const struct ip_vs_get_services *get,
- struct ip_vs_get_services __user *uptr)
-{
- int idx, count=0;
- struct ip_vs_service *svc;
- struct ip_vs_service_entry entry;
- int ret = 0;
-
- for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
- /* Only expose IPv4 entries to old interface */
- if (svc->af != AF_INET)
- continue;
-
- if (count >= get->num_services)
- goto out;
- memset(&entry, 0, sizeof(entry));
- ip_vs_copy_service(&entry, svc);
- if (copy_to_user(&uptr->entrytable[count],
- &entry, sizeof(entry))) {
- ret = -EFAULT;
- goto out;
- }
- count++;
- }
- }
-
- for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
- /* Only expose IPv4 entries to old interface */
- if (svc->af != AF_INET)
- continue;
-
- if (count >= get->num_services)
- goto out;
- memset(&entry, 0, sizeof(entry));
- ip_vs_copy_service(&entry, svc);
- if (copy_to_user(&uptr->entrytable[count],
- &entry, sizeof(entry))) {
- ret = -EFAULT;
- goto out;
- }
- count++;
- }
- }
- out:
- return ret;
-}
-
-static inline int
-__ip_vs_get_dest_entries(const struct ip_vs_get_dests *get,
- struct ip_vs_get_dests __user *uptr)
-{
- struct ip_vs_service *svc;
- union nf_inet_addr addr = { .ip = get->addr };
- int ret = 0;
-
- if (get->fwmark)
- svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark);
- else
- svc = __ip_vs_service_get(AF_INET, get->protocol, &addr,
- get->port);
-
- if (svc) {
- int count = 0;
- struct ip_vs_dest *dest;
- struct ip_vs_dest_entry entry;
-
- list_for_each_entry(dest, &svc->destinations, n_list) {
- if (count >= get->num_dests)
- break;
-
- entry.addr = dest->addr.ip;
- entry.port = dest->port;
- entry.conn_flags = atomic_read(&dest->conn_flags);
- entry.weight = atomic_read(&dest->weight);
- entry.u_threshold = dest->u_threshold;
- entry.l_threshold = dest->l_threshold;
- entry.activeconns = atomic_read(&dest->activeconns);
- entry.inactconns = atomic_read(&dest->inactconns);
- entry.persistconns = atomic_read(&dest->persistconns);
- ip_vs_copy_stats(&entry.stats, &dest->stats);
- if (copy_to_user(&uptr->entrytable[count],
- &entry, sizeof(entry))) {
- ret = -EFAULT;
- break;
- }
- count++;
- }
- ip_vs_service_put(svc);
- } else
- ret = -ESRCH;
- return ret;
-}
-
-static inline void
-__ip_vs_get_timeouts(struct ip_vs_timeout_user *u)
-{
-#ifdef CONFIG_IP_VS_PROTO_TCP
- u->tcp_timeout =
- ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
- u->tcp_fin_timeout =
- ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
-#endif
-#ifdef CONFIG_IP_VS_PROTO_UDP
- u->udp_timeout =
- ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
-#endif
-}
-
-
-#define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
-#define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
-#define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
-#define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
-#define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
-#define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
-#define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
-
-static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
- [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
- [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
- [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
-};
-
-static int
-do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
-{
- unsigned char arg[128];
- int ret = 0;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- if (*len < get_arglen[GET_CMDID(cmd)]) {
- IP_VS_ERR("get_ctl: len %u < %u\n",
- *len, get_arglen[GET_CMDID(cmd)]);
- return -EINVAL;
- }
-
- if (copy_from_user(arg, user, get_arglen[GET_CMDID(cmd)]) != 0)
- return -EFAULT;
-
- if (mutex_lock_interruptible(&__ip_vs_mutex))
- return -ERESTARTSYS;
-
- switch (cmd) {
- case IP_VS_SO_GET_VERSION:
- {
- char buf[64];
-
- sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
- NVERSION(IP_VS_VERSION_CODE), IP_VS_CONN_TAB_SIZE);
- if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
- ret = -EFAULT;
- goto out;
- }
- *len = strlen(buf)+1;
- }
- break;
-
- case IP_VS_SO_GET_INFO:
- {
- struct ip_vs_getinfo info;
- info.version = IP_VS_VERSION_CODE;
- info.size = IP_VS_CONN_TAB_SIZE;
- info.num_services = ip_vs_num_services;
- if (copy_to_user(user, &info, sizeof(info)) != 0)
- ret = -EFAULT;
- }
- break;
-
- case IP_VS_SO_GET_SERVICES:
- {
- struct ip_vs_get_services *get;
- int size;
-
- get = (struct ip_vs_get_services *)arg;
- size = sizeof(*get) +
- sizeof(struct ip_vs_service_entry) * get->num_services;
- if (*len != size) {
- IP_VS_ERR("length: %u != %u\n", *len, size);
- ret = -EINVAL;
- goto out;
- }
- ret = __ip_vs_get_service_entries(get, user);
- }
- break;
-
- case IP_VS_SO_GET_SERVICE:
- {
- struct ip_vs_service_entry *entry;
- struct ip_vs_service *svc;
- union nf_inet_addr addr;
-
- entry = (struct ip_vs_service_entry *)arg;
- addr.ip = entry->addr;
- if (entry->fwmark)
- svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark);
- else
- svc = __ip_vs_service_get(AF_INET, entry->protocol,
- &addr, entry->port);
- if (svc) {
- ip_vs_copy_service(entry, svc);
- if (copy_to_user(user, entry, sizeof(*entry)) != 0)
- ret = -EFAULT;
- ip_vs_service_put(svc);
- } else
- ret = -ESRCH;
- }
- break;
-
- case IP_VS_SO_GET_DESTS:
- {
- struct ip_vs_get_dests *get;
- int size;
-
- get = (struct ip_vs_get_dests *)arg;
- size = sizeof(*get) +
- sizeof(struct ip_vs_dest_entry) * get->num_dests;
- if (*len != size) {
- IP_VS_ERR("length: %u != %u\n", *len, size);
- ret = -EINVAL;
- goto out;
- }
- ret = __ip_vs_get_dest_entries(get, user);
- }
- break;
-
- case IP_VS_SO_GET_TIMEOUT:
- {
- struct ip_vs_timeout_user t;
-
- __ip_vs_get_timeouts(&t);
- if (copy_to_user(user, &t, sizeof(t)) != 0)
- ret = -EFAULT;
- }
- break;
-
- case IP_VS_SO_GET_DAEMON:
- {
- struct ip_vs_daemon_user d[2];
-
- memset(&d, 0, sizeof(d));
- if (ip_vs_sync_state & IP_VS_STATE_MASTER) {
- d[0].state = IP_VS_STATE_MASTER;
- strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn));
- d[0].syncid = ip_vs_master_syncid;
- }
- if (ip_vs_sync_state & IP_VS_STATE_BACKUP) {
- d[1].state = IP_VS_STATE_BACKUP;
- strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn));
- d[1].syncid = ip_vs_backup_syncid;
- }
- if (copy_to_user(user, &d, sizeof(d)) != 0)
- ret = -EFAULT;
- }
- break;
-
- default:
- ret = -EINVAL;
- }
-
- out:
- mutex_unlock(&__ip_vs_mutex);
- return ret;
-}
-
-
-static struct nf_sockopt_ops ip_vs_sockopts = {
- .pf = PF_INET,
- .set_optmin = IP_VS_BASE_CTL,
- .set_optmax = IP_VS_SO_SET_MAX+1,
- .set = do_ip_vs_set_ctl,
- .get_optmin = IP_VS_BASE_CTL,
- .get_optmax = IP_VS_SO_GET_MAX+1,
- .get = do_ip_vs_get_ctl,
- .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->ustats.conns);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->ustats.inpkts);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->ustats.outpkts);
- NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->ustats.inbytes);
- NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->ustats.outbytes);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->ustats.cps);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->ustats.inpps);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->ustats.outpps);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->ustats.inbps);
- NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->ustats.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, svc->af);
-
- 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_kern *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;
-
- usvc->af = nla_get_u16(nla_af);
-#ifdef CONFIG_IP_VS_IPV6
- if (usvc->af != AF_INET && usvc->af != AF_INET6)
-#else
- if (usvc->af != AF_INET)
-#endif
- 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->af, usvc->fwmark);
- else
- svc = __ip_vs_service_get(usvc->af, 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);
- usvc->sched_name = nla_data(nla_sched);
- 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_kern 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.af, usvc.fwmark);
- else
- return __ip_vs_service_get(usvc.af, 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_kern *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_kern usvc;
- struct ip_vs_dest_user_kern 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.af, usvc.protocol,
- &usvc.addr, usvc.port);
- else
- svc = __ip_vs_svc_fwm_get(usvc.af, 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)
-{
- int ret;
- int idx;
-
- EnterFunction(2);
-
- 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;
- }
-
- proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops);
- proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops);
-
- sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars);
-
- /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
- for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
- INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
- INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
- }
- for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) {
- INIT_LIST_HEAD(&ip_vs_rtable[idx]);
- }
-
- ip_vs_new_estimator(&ip_vs_stats);
-
- /* Hook the defense timer */
- schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
-
- LeaveFunction(2);
- return 0;
-}
-
-
-void ip_vs_control_cleanup(void)
-{
- EnterFunction(2);
- ip_vs_trash_cleanup();
- cancel_rearming_delayed_work(&defense_work);
- cancel_work_sync(&defense_work.work);
- ip_vs_kill_estimator(&ip_vs_stats);
- 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);
-}