2 * IPVS An implementation of the IP virtual server support for the
3 * LINUX operating system. IPVS is now implemented as a module
4 * over the NetFilter framework. IPVS can be used to build a
5 * high-performance and highly available server based on a
8 * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
9 * Peter Kese <peter.kese@ijs.si>
10 * Julian Anastasov <ja@ssi.bg>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
21 #define KMSG_COMPONENT "IPVS"
22 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/types.h>
27 #include <linux/capability.h>
29 #include <linux/sysctl.h>
30 #include <linux/proc_fs.h>
31 #include <linux/workqueue.h>
32 #include <linux/swap.h>
33 #include <linux/seq_file.h>
34 #include <linux/slab.h>
36 #include <linux/netfilter.h>
37 #include <linux/netfilter_ipv4.h>
38 #include <linux/mutex.h>
40 #include <net/net_namespace.h>
42 #ifdef CONFIG_IP_VS_IPV6
44 #include <net/ip6_route.h>
46 #include <net/route.h>
48 #include <net/genetlink.h>
50 #include <asm/uaccess.h>
52 #include <net/ip_vs.h>
54 /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
55 static DEFINE_MUTEX(__ip_vs_mutex);
57 /* lock for service table */
58 static DEFINE_RWLOCK(__ip_vs_svc_lock);
60 /* lock for table with the real services */
61 static DEFINE_RWLOCK(__ip_vs_rs_lock);
63 /* lock for state and timeout tables */
64 static DEFINE_RWLOCK(__ip_vs_securetcp_lock);
66 /* lock for drop entry handling */
67 static DEFINE_SPINLOCK(__ip_vs_dropentry_lock);
69 /* lock for drop packet handling */
70 static DEFINE_SPINLOCK(__ip_vs_droppacket_lock);
72 /* 1/rate drop and drop-entry variables */
73 int ip_vs_drop_rate = 0;
74 int ip_vs_drop_counter = 0;
75 static atomic_t ip_vs_dropentry = ATOMIC_INIT(0);
77 /* number of virtual services */
78 static int ip_vs_num_services = 0;
80 /* sysctl variables */
81 static int sysctl_ip_vs_drop_entry = 0;
82 static int sysctl_ip_vs_drop_packet = 0;
83 static int sysctl_ip_vs_secure_tcp = 0;
84 static int sysctl_ip_vs_amemthresh = 1024;
85 static int sysctl_ip_vs_am_droprate = 10;
86 int sysctl_ip_vs_cache_bypass = 0;
87 int sysctl_ip_vs_expire_nodest_conn = 0;
88 int sysctl_ip_vs_expire_quiescent_template = 0;
89 int sysctl_ip_vs_sync_threshold[2] = { 3, 50 };
90 int sysctl_ip_vs_nat_icmp_send = 0;
93 #ifdef CONFIG_IP_VS_DEBUG
94 static int sysctl_ip_vs_debug_level = 0;
96 int ip_vs_get_debug_level(void)
98 return sysctl_ip_vs_debug_level;
102 #ifdef CONFIG_IP_VS_IPV6
103 /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
104 static int __ip_vs_addr_is_local_v6(const struct in6_addr *addr)
112 .saddr = { .s6_addr32 = {0, 0, 0, 0} }, } },
115 rt = (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl);
116 if (rt && rt->rt6i_dev && (rt->rt6i_dev->flags & IFF_LOOPBACK))
123 * update_defense_level is called from keventd and from sysctl,
124 * so it needs to protect itself from softirqs
126 static void update_defense_level(void)
129 static int old_secure_tcp = 0;
134 /* we only count free and buffered memory (in pages) */
136 availmem = i.freeram + i.bufferram;
137 /* however in linux 2.5 the i.bufferram is total page cache size,
139 /* si_swapinfo(&i); */
140 /* availmem = availmem - (i.totalswap - i.freeswap); */
142 nomem = (availmem < sysctl_ip_vs_amemthresh);
147 spin_lock(&__ip_vs_dropentry_lock);
148 switch (sysctl_ip_vs_drop_entry) {
150 atomic_set(&ip_vs_dropentry, 0);
154 atomic_set(&ip_vs_dropentry, 1);
155 sysctl_ip_vs_drop_entry = 2;
157 atomic_set(&ip_vs_dropentry, 0);
162 atomic_set(&ip_vs_dropentry, 1);
164 atomic_set(&ip_vs_dropentry, 0);
165 sysctl_ip_vs_drop_entry = 1;
169 atomic_set(&ip_vs_dropentry, 1);
172 spin_unlock(&__ip_vs_dropentry_lock);
175 spin_lock(&__ip_vs_droppacket_lock);
176 switch (sysctl_ip_vs_drop_packet) {
182 ip_vs_drop_rate = ip_vs_drop_counter
183 = sysctl_ip_vs_amemthresh /
184 (sysctl_ip_vs_amemthresh-availmem);
185 sysctl_ip_vs_drop_packet = 2;
192 ip_vs_drop_rate = ip_vs_drop_counter
193 = sysctl_ip_vs_amemthresh /
194 (sysctl_ip_vs_amemthresh-availmem);
197 sysctl_ip_vs_drop_packet = 1;
201 ip_vs_drop_rate = sysctl_ip_vs_am_droprate;
204 spin_unlock(&__ip_vs_droppacket_lock);
207 write_lock(&__ip_vs_securetcp_lock);
208 switch (sysctl_ip_vs_secure_tcp) {
210 if (old_secure_tcp >= 2)
215 if (old_secure_tcp < 2)
217 sysctl_ip_vs_secure_tcp = 2;
219 if (old_secure_tcp >= 2)
225 if (old_secure_tcp < 2)
228 if (old_secure_tcp >= 2)
230 sysctl_ip_vs_secure_tcp = 1;
234 if (old_secure_tcp < 2)
238 old_secure_tcp = sysctl_ip_vs_secure_tcp;
240 ip_vs_protocol_timeout_change(sysctl_ip_vs_secure_tcp>1);
241 write_unlock(&__ip_vs_securetcp_lock);
248 * Timer for checking the defense
250 #define DEFENSE_TIMER_PERIOD 1*HZ
251 static void defense_work_handler(struct work_struct *work);
252 static DECLARE_DELAYED_WORK(defense_work, defense_work_handler);
254 static void defense_work_handler(struct work_struct *work)
256 update_defense_level();
257 if (atomic_read(&ip_vs_dropentry))
258 ip_vs_random_dropentry();
260 schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
264 ip_vs_use_count_inc(void)
266 return try_module_get(THIS_MODULE);
270 ip_vs_use_count_dec(void)
272 module_put(THIS_MODULE);
277 * Hash table: for virtual service lookups
279 #define IP_VS_SVC_TAB_BITS 8
280 #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
281 #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
283 /* the service table hashed by <protocol, addr, port> */
284 static struct list_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
285 /* the service table hashed by fwmark */
286 static struct list_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
289 * Hash table: for real service lookups
291 #define IP_VS_RTAB_BITS 4
292 #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
293 #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
295 static struct list_head ip_vs_rtable[IP_VS_RTAB_SIZE];
298 * Trash for destinations
300 static LIST_HEAD(ip_vs_dest_trash);
303 * FTP & NULL virtual service counters
305 static atomic_t ip_vs_ftpsvc_counter = ATOMIC_INIT(0);
306 static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0);
310 * Returns hash value for virtual service
312 static __inline__ unsigned
313 ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr,
316 register unsigned porth = ntohs(port);
317 __be32 addr_fold = addr->ip;
319 #ifdef CONFIG_IP_VS_IPV6
321 addr_fold = addr->ip6[0]^addr->ip6[1]^
322 addr->ip6[2]^addr->ip6[3];
325 return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
326 & IP_VS_SVC_TAB_MASK;
330 * Returns hash value of fwmark for virtual service lookup
332 static __inline__ unsigned ip_vs_svc_fwm_hashkey(__u32 fwmark)
334 return fwmark & IP_VS_SVC_TAB_MASK;
338 * Hashes a service in the ip_vs_svc_table by <proto,addr,port>
339 * or in the ip_vs_svc_fwm_table by fwmark.
340 * Should be called with locked tables.
342 static int ip_vs_svc_hash(struct ip_vs_service *svc)
346 if (svc->flags & IP_VS_SVC_F_HASHED) {
347 pr_err("%s(): request for already hashed, called from %pF\n",
348 __func__, __builtin_return_address(0));
352 if (svc->fwmark == 0) {
354 * Hash it by <protocol,addr,port> in ip_vs_svc_table
356 hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr,
358 list_add(&svc->s_list, &ip_vs_svc_table[hash]);
361 * Hash it by fwmark in ip_vs_svc_fwm_table
363 hash = ip_vs_svc_fwm_hashkey(svc->fwmark);
364 list_add(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
367 svc->flags |= IP_VS_SVC_F_HASHED;
368 /* increase its refcnt because it is referenced by the svc table */
369 atomic_inc(&svc->refcnt);
375 * Unhashes a service from ip_vs_svc_table/ip_vs_svc_fwm_table.
376 * Should be called with locked tables.
378 static int ip_vs_svc_unhash(struct ip_vs_service *svc)
380 if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
381 pr_err("%s(): request for unhash flagged, called from %pF\n",
382 __func__, __builtin_return_address(0));
386 if (svc->fwmark == 0) {
387 /* Remove it from the ip_vs_svc_table table */
388 list_del(&svc->s_list);
390 /* Remove it from the ip_vs_svc_fwm_table table */
391 list_del(&svc->f_list);
394 svc->flags &= ~IP_VS_SVC_F_HASHED;
395 atomic_dec(&svc->refcnt);
401 * Get service by {proto,addr,port} in the service table.
403 static inline struct ip_vs_service *
404 __ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr,
408 struct ip_vs_service *svc;
410 /* Check for "full" addressed entries */
411 hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport);
413 list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){
415 && ip_vs_addr_equal(af, &svc->addr, vaddr)
416 && (svc->port == vport)
417 && (svc->protocol == protocol)) {
419 atomic_inc(&svc->usecnt);
429 * Get service by {fwmark} in the service table.
431 static inline struct ip_vs_service *
432 __ip_vs_svc_fwm_get(int af, __u32 fwmark)
435 struct ip_vs_service *svc;
437 /* Check for fwmark addressed entries */
438 hash = ip_vs_svc_fwm_hashkey(fwmark);
440 list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
441 if (svc->fwmark == fwmark && svc->af == af) {
443 atomic_inc(&svc->usecnt);
451 struct ip_vs_service *
452 ip_vs_service_get(int af, __u32 fwmark, __u16 protocol,
453 const union nf_inet_addr *vaddr, __be16 vport)
455 struct ip_vs_service *svc;
457 read_lock(&__ip_vs_svc_lock);
460 * Check the table hashed by fwmark first
462 if (fwmark && (svc = __ip_vs_svc_fwm_get(af, fwmark)))
466 * Check the table hashed by <protocol,addr,port>
467 * for "full" addressed entries
469 svc = __ip_vs_service_get(af, protocol, vaddr, vport);
472 && protocol == IPPROTO_TCP
473 && atomic_read(&ip_vs_ftpsvc_counter)
474 && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
476 * Check if ftp service entry exists, the packet
477 * might belong to FTP data connections.
479 svc = __ip_vs_service_get(af, protocol, vaddr, FTPPORT);
483 && atomic_read(&ip_vs_nullsvc_counter)) {
485 * Check if the catch-all port (port zero) exists
487 svc = __ip_vs_service_get(af, protocol, vaddr, 0);
491 read_unlock(&__ip_vs_svc_lock);
493 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
494 fwmark, ip_vs_proto_name(protocol),
495 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
496 svc ? "hit" : "not hit");
503 __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
505 atomic_inc(&svc->refcnt);
510 __ip_vs_unbind_svc(struct ip_vs_dest *dest)
512 struct ip_vs_service *svc = dest->svc;
515 if (atomic_dec_and_test(&svc->refcnt))
521 * Returns hash value for real service
523 static inline unsigned ip_vs_rs_hashkey(int af,
524 const union nf_inet_addr *addr,
527 register unsigned porth = ntohs(port);
528 __be32 addr_fold = addr->ip;
530 #ifdef CONFIG_IP_VS_IPV6
532 addr_fold = addr->ip6[0]^addr->ip6[1]^
533 addr->ip6[2]^addr->ip6[3];
536 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
541 * Hashes ip_vs_dest in ip_vs_rtable by <proto,addr,port>.
542 * should be called with locked tables.
544 static int ip_vs_rs_hash(struct ip_vs_dest *dest)
548 if (!list_empty(&dest->d_list)) {
553 * Hash by proto,addr,port,
554 * which are the parameters of the real service.
556 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
558 list_add(&dest->d_list, &ip_vs_rtable[hash]);
564 * UNhashes ip_vs_dest from ip_vs_rtable.
565 * should be called with locked tables.
567 static int ip_vs_rs_unhash(struct ip_vs_dest *dest)
570 * Remove it from the ip_vs_rtable table.
572 if (!list_empty(&dest->d_list)) {
573 list_del(&dest->d_list);
574 INIT_LIST_HEAD(&dest->d_list);
581 * Lookup real service by <proto,addr,port> in the real service table.
584 ip_vs_lookup_real_service(int af, __u16 protocol,
585 const union nf_inet_addr *daddr,
589 struct ip_vs_dest *dest;
592 * Check for "full" addressed entries
593 * Return the first found entry
595 hash = ip_vs_rs_hashkey(af, daddr, dport);
597 read_lock(&__ip_vs_rs_lock);
598 list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) {
600 && ip_vs_addr_equal(af, &dest->addr, daddr)
601 && (dest->port == dport)
602 && ((dest->protocol == protocol) ||
605 read_unlock(&__ip_vs_rs_lock);
609 read_unlock(&__ip_vs_rs_lock);
615 * Lookup destination by {addr,port} in the given service
617 static struct ip_vs_dest *
618 ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
621 struct ip_vs_dest *dest;
624 * Find the destination for the given service
626 list_for_each_entry(dest, &svc->destinations, n_list) {
627 if ((dest->af == svc->af)
628 && ip_vs_addr_equal(svc->af, &dest->addr, daddr)
629 && (dest->port == dport)) {
639 * Find destination by {daddr,dport,vaddr,protocol}
640 * Cretaed to be used in ip_vs_process_message() in
641 * the backup synchronization daemon. It finds the
642 * destination to be bound to the received connection
645 * ip_vs_lookup_real_service() looked promissing, but
646 * seems not working as expected.
648 struct ip_vs_dest *ip_vs_find_dest(int af, const union nf_inet_addr *daddr,
650 const union nf_inet_addr *vaddr,
651 __be16 vport, __u16 protocol)
653 struct ip_vs_dest *dest;
654 struct ip_vs_service *svc;
656 svc = ip_vs_service_get(af, 0, protocol, vaddr, vport);
659 dest = ip_vs_lookup_dest(svc, daddr, dport);
661 atomic_inc(&dest->refcnt);
662 ip_vs_service_put(svc);
667 * Lookup dest by {svc,addr,port} in the destination trash.
668 * The destination trash is used to hold the destinations that are removed
669 * from the service table but are still referenced by some conn entries.
670 * The reason to add the destination trash is when the dest is temporary
671 * down (either by administrator or by monitor program), the dest can be
672 * picked back from the trash, the remaining connections to the dest can
673 * continue, and the counting information of the dest is also useful for
676 static struct ip_vs_dest *
677 ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
680 struct ip_vs_dest *dest, *nxt;
683 * Find the destination in trash
685 list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
686 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
689 IP_VS_DBG_ADDR(svc->af, &dest->addr),
691 atomic_read(&dest->refcnt));
692 if (dest->af == svc->af &&
693 ip_vs_addr_equal(svc->af, &dest->addr, daddr) &&
694 dest->port == dport &&
695 dest->vfwmark == svc->fwmark &&
696 dest->protocol == svc->protocol &&
698 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
699 dest->vport == svc->port))) {
705 * Try to purge the destination from trash if not referenced
707 if (atomic_read(&dest->refcnt) == 1) {
708 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u "
711 IP_VS_DBG_ADDR(svc->af, &dest->addr),
713 list_del(&dest->n_list);
714 ip_vs_dst_reset(dest);
715 __ip_vs_unbind_svc(dest);
725 * Clean up all the destinations in the trash
726 * Called by the ip_vs_control_cleanup()
728 * When the ip_vs_control_clearup is activated by ipvs module exit,
729 * the service tables must have been flushed and all the connections
730 * are expired, and the refcnt of each destination in the trash must
731 * be 1, so we simply release them here.
733 static void ip_vs_trash_cleanup(void)
735 struct ip_vs_dest *dest, *nxt;
737 list_for_each_entry_safe(dest, nxt, &ip_vs_dest_trash, n_list) {
738 list_del(&dest->n_list);
739 ip_vs_dst_reset(dest);
740 __ip_vs_unbind_svc(dest);
747 ip_vs_zero_stats(struct ip_vs_stats *stats)
749 spin_lock_bh(&stats->lock);
751 memset(&stats->ustats, 0, sizeof(stats->ustats));
752 ip_vs_zero_estimator(stats);
754 spin_unlock_bh(&stats->lock);
758 * Update a destination in the given service
761 __ip_vs_update_dest(struct ip_vs_service *svc,
762 struct ip_vs_dest *dest, struct ip_vs_dest_user_kern *udest)
766 /* set the weight and the flags */
767 atomic_set(&dest->weight, udest->weight);
768 conn_flags = udest->conn_flags | IP_VS_CONN_F_INACTIVE;
770 /* check if local node and update the flags */
771 #ifdef CONFIG_IP_VS_IPV6
772 if (svc->af == AF_INET6) {
773 if (__ip_vs_addr_is_local_v6(&udest->addr.in6)) {
774 conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
775 | IP_VS_CONN_F_LOCALNODE;
779 if (inet_addr_type(&init_net, udest->addr.ip) == RTN_LOCAL) {
780 conn_flags = (conn_flags & ~IP_VS_CONN_F_FWD_MASK)
781 | IP_VS_CONN_F_LOCALNODE;
784 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
785 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != 0) {
786 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
789 * Put the real service in ip_vs_rtable if not present.
790 * For now only for NAT!
792 write_lock_bh(&__ip_vs_rs_lock);
794 write_unlock_bh(&__ip_vs_rs_lock);
796 atomic_set(&dest->conn_flags, conn_flags);
798 /* bind the service */
800 __ip_vs_bind_svc(dest, svc);
802 if (dest->svc != svc) {
803 __ip_vs_unbind_svc(dest);
804 ip_vs_zero_stats(&dest->stats);
805 __ip_vs_bind_svc(dest, svc);
809 /* set the dest status flags */
810 dest->flags |= IP_VS_DEST_F_AVAILABLE;
812 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
813 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
814 dest->u_threshold = udest->u_threshold;
815 dest->l_threshold = udest->l_threshold;
820 * Create a destination for the given service
823 ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
824 struct ip_vs_dest **dest_p)
826 struct ip_vs_dest *dest;
831 #ifdef CONFIG_IP_VS_IPV6
832 if (svc->af == AF_INET6) {
833 atype = ipv6_addr_type(&udest->addr.in6);
834 if ((!(atype & IPV6_ADDR_UNICAST) ||
835 atype & IPV6_ADDR_LINKLOCAL) &&
836 !__ip_vs_addr_is_local_v6(&udest->addr.in6))
841 atype = inet_addr_type(&init_net, udest->addr.ip);
842 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
846 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_ATOMIC);
848 pr_err("%s(): no memory.\n", __func__);
853 dest->protocol = svc->protocol;
854 dest->vaddr = svc->addr;
855 dest->vport = svc->port;
856 dest->vfwmark = svc->fwmark;
857 ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr);
858 dest->port = udest->port;
860 atomic_set(&dest->activeconns, 0);
861 atomic_set(&dest->inactconns, 0);
862 atomic_set(&dest->persistconns, 0);
863 atomic_set(&dest->refcnt, 0);
865 INIT_LIST_HEAD(&dest->d_list);
866 spin_lock_init(&dest->dst_lock);
867 spin_lock_init(&dest->stats.lock);
868 __ip_vs_update_dest(svc, dest, udest);
869 ip_vs_new_estimator(&dest->stats);
879 * Add a destination into an existing service
882 ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
884 struct ip_vs_dest *dest;
885 union nf_inet_addr daddr;
886 __be16 dport = udest->port;
891 if (udest->weight < 0) {
892 pr_err("%s(): server weight less than zero\n", __func__);
896 if (udest->l_threshold > udest->u_threshold) {
897 pr_err("%s(): lower threshold is higher than upper threshold\n",
902 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
905 * Check if the dest already exists in the list
907 dest = ip_vs_lookup_dest(svc, &daddr, dport);
910 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
915 * Check if the dest already exists in the trash and
916 * is from the same service
918 dest = ip_vs_trash_get_dest(svc, &daddr, dport);
921 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
922 "dest->refcnt=%d, service %u/%s:%u\n",
923 IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport),
924 atomic_read(&dest->refcnt),
926 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
929 __ip_vs_update_dest(svc, dest, udest);
932 * Get the destination from the trash
934 list_del(&dest->n_list);
936 ip_vs_new_estimator(&dest->stats);
938 write_lock_bh(&__ip_vs_svc_lock);
941 * Wait until all other svc users go away.
943 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
945 list_add(&dest->n_list, &svc->destinations);
948 /* call the update_service function of its scheduler */
949 if (svc->scheduler->update_service)
950 svc->scheduler->update_service(svc);
952 write_unlock_bh(&__ip_vs_svc_lock);
957 * Allocate and initialize the dest structure
959 ret = ip_vs_new_dest(svc, udest, &dest);
965 * Add the dest entry into the list
967 atomic_inc(&dest->refcnt);
969 write_lock_bh(&__ip_vs_svc_lock);
972 * Wait until all other svc users go away.
974 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
976 list_add(&dest->n_list, &svc->destinations);
979 /* call the update_service function of its scheduler */
980 if (svc->scheduler->update_service)
981 svc->scheduler->update_service(svc);
983 write_unlock_bh(&__ip_vs_svc_lock);
992 * Edit a destination in the given service
995 ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
997 struct ip_vs_dest *dest;
998 union nf_inet_addr daddr;
999 __be16 dport = udest->port;
1003 if (udest->weight < 0) {
1004 pr_err("%s(): server weight less than zero\n", __func__);
1008 if (udest->l_threshold > udest->u_threshold) {
1009 pr_err("%s(): lower threshold is higher than upper threshold\n",
1014 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
1017 * Lookup the destination list
1019 dest = ip_vs_lookup_dest(svc, &daddr, dport);
1022 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1026 __ip_vs_update_dest(svc, dest, udest);
1028 write_lock_bh(&__ip_vs_svc_lock);
1030 /* Wait until all other svc users go away */
1031 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1033 /* call the update_service, because server weight may be changed */
1034 if (svc->scheduler->update_service)
1035 svc->scheduler->update_service(svc);
1037 write_unlock_bh(&__ip_vs_svc_lock);
1046 * Delete a destination (must be already unlinked from the service)
1048 static void __ip_vs_del_dest(struct ip_vs_dest *dest)
1050 ip_vs_kill_estimator(&dest->stats);
1053 * Remove it from the d-linked list with the real services.
1055 write_lock_bh(&__ip_vs_rs_lock);
1056 ip_vs_rs_unhash(dest);
1057 write_unlock_bh(&__ip_vs_rs_lock);
1060 * Decrease the refcnt of the dest, and free the dest
1061 * if nobody refers to it (refcnt=0). Otherwise, throw
1062 * the destination into the trash.
1064 if (atomic_dec_and_test(&dest->refcnt)) {
1065 ip_vs_dst_reset(dest);
1066 /* simply decrease svc->refcnt here, let the caller check
1067 and release the service if nobody refers to it.
1068 Only user context can release destination and service,
1069 and only one user context can update virtual service at a
1070 time, so the operation here is OK */
1071 atomic_dec(&dest->svc->refcnt);
1074 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, "
1075 "dest->refcnt=%d\n",
1076 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1078 atomic_read(&dest->refcnt));
1079 list_add(&dest->n_list, &ip_vs_dest_trash);
1080 atomic_inc(&dest->refcnt);
1086 * Unlink a destination from the given service
1088 static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1089 struct ip_vs_dest *dest,
1092 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1095 * Remove it from the d-linked destination list.
1097 list_del(&dest->n_list);
1101 * Call the update_service function of its scheduler
1103 if (svcupd && svc->scheduler->update_service)
1104 svc->scheduler->update_service(svc);
1109 * Delete a destination server in the given service
1112 ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1114 struct ip_vs_dest *dest;
1115 __be16 dport = udest->port;
1119 dest = ip_vs_lookup_dest(svc, &udest->addr, dport);
1122 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1126 write_lock_bh(&__ip_vs_svc_lock);
1129 * Wait until all other svc users go away.
1131 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1134 * Unlink dest from the service
1136 __ip_vs_unlink_dest(svc, dest, 1);
1138 write_unlock_bh(&__ip_vs_svc_lock);
1141 * Delete the destination
1143 __ip_vs_del_dest(dest);
1152 * Add a service into the service hash table
1155 ip_vs_add_service(struct ip_vs_service_user_kern *u,
1156 struct ip_vs_service **svc_p)
1159 struct ip_vs_scheduler *sched = NULL;
1160 struct ip_vs_service *svc = NULL;
1162 /* increase the module use count */
1163 ip_vs_use_count_inc();
1165 /* Lookup the scheduler by 'u->sched_name' */
1166 sched = ip_vs_scheduler_get(u->sched_name);
1167 if (sched == NULL) {
1168 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1173 #ifdef CONFIG_IP_VS_IPV6
1174 if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) {
1180 svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC);
1182 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1187 /* I'm the first user of the service */
1188 atomic_set(&svc->usecnt, 1);
1189 atomic_set(&svc->refcnt, 0);
1192 svc->protocol = u->protocol;
1193 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1194 svc->port = u->port;
1195 svc->fwmark = u->fwmark;
1196 svc->flags = u->flags;
1197 svc->timeout = u->timeout * HZ;
1198 svc->netmask = u->netmask;
1200 INIT_LIST_HEAD(&svc->destinations);
1201 rwlock_init(&svc->sched_lock);
1202 spin_lock_init(&svc->stats.lock);
1204 /* Bind the scheduler */
1205 ret = ip_vs_bind_scheduler(svc, sched);
1210 /* Update the virtual service counters */
1211 if (svc->port == FTPPORT)
1212 atomic_inc(&ip_vs_ftpsvc_counter);
1213 else if (svc->port == 0)
1214 atomic_inc(&ip_vs_nullsvc_counter);
1216 ip_vs_new_estimator(&svc->stats);
1218 /* Count only IPv4 services for old get/setsockopt interface */
1219 if (svc->af == AF_INET)
1220 ip_vs_num_services++;
1222 /* Hash the service into the service table */
1223 write_lock_bh(&__ip_vs_svc_lock);
1224 ip_vs_svc_hash(svc);
1225 write_unlock_bh(&__ip_vs_svc_lock);
1233 ip_vs_unbind_scheduler(svc);
1236 ip_vs_app_inc_put(svc->inc);
1241 ip_vs_scheduler_put(sched);
1244 /* decrease the module use count */
1245 ip_vs_use_count_dec();
1252 * Edit a service and bind it with a new scheduler
1255 ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1257 struct ip_vs_scheduler *sched, *old_sched;
1261 * Lookup the scheduler, by 'u->sched_name'
1263 sched = ip_vs_scheduler_get(u->sched_name);
1264 if (sched == NULL) {
1265 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1270 #ifdef CONFIG_IP_VS_IPV6
1271 if (u->af == AF_INET6 && (u->netmask < 1 || u->netmask > 128)) {
1277 write_lock_bh(&__ip_vs_svc_lock);
1280 * Wait until all other svc users go away.
1282 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1285 * Set the flags and timeout value
1287 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1288 svc->timeout = u->timeout * HZ;
1289 svc->netmask = u->netmask;
1291 old_sched = svc->scheduler;
1292 if (sched != old_sched) {
1294 * Unbind the old scheduler
1296 if ((ret = ip_vs_unbind_scheduler(svc))) {
1302 * Bind the new scheduler
1304 if ((ret = ip_vs_bind_scheduler(svc, sched))) {
1306 * If ip_vs_bind_scheduler fails, restore the old
1308 * The main reason of failure is out of memory.
1310 * The question is if the old scheduler can be
1311 * restored all the time. TODO: if it cannot be
1312 * restored some time, we must delete the service,
1313 * otherwise the system may crash.
1315 ip_vs_bind_scheduler(svc, old_sched);
1322 write_unlock_bh(&__ip_vs_svc_lock);
1323 #ifdef CONFIG_IP_VS_IPV6
1328 ip_vs_scheduler_put(old_sched);
1335 * Delete a service from the service list
1336 * - The service must be unlinked, unlocked and not referenced!
1337 * - We are called under _bh lock
1339 static void __ip_vs_del_service(struct ip_vs_service *svc)
1341 struct ip_vs_dest *dest, *nxt;
1342 struct ip_vs_scheduler *old_sched;
1344 /* Count only IPv4 services for old get/setsockopt interface */
1345 if (svc->af == AF_INET)
1346 ip_vs_num_services--;
1348 ip_vs_kill_estimator(&svc->stats);
1350 /* Unbind scheduler */
1351 old_sched = svc->scheduler;
1352 ip_vs_unbind_scheduler(svc);
1354 ip_vs_scheduler_put(old_sched);
1356 /* Unbind app inc */
1358 ip_vs_app_inc_put(svc->inc);
1363 * Unlink the whole destination list
1365 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1366 __ip_vs_unlink_dest(svc, dest, 0);
1367 __ip_vs_del_dest(dest);
1371 * Update the virtual service counters
1373 if (svc->port == FTPPORT)
1374 atomic_dec(&ip_vs_ftpsvc_counter);
1375 else if (svc->port == 0)
1376 atomic_dec(&ip_vs_nullsvc_counter);
1379 * Free the service if nobody refers to it
1381 if (atomic_read(&svc->refcnt) == 0)
1384 /* decrease the module use count */
1385 ip_vs_use_count_dec();
1389 * Delete a service from the service list
1391 static int ip_vs_del_service(struct ip_vs_service *svc)
1397 * Unhash it from the service table
1399 write_lock_bh(&__ip_vs_svc_lock);
1401 ip_vs_svc_unhash(svc);
1404 * Wait until all the svc users go away.
1406 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 1);
1408 __ip_vs_del_service(svc);
1410 write_unlock_bh(&__ip_vs_svc_lock);
1417 * Flush all the virtual services
1419 static int ip_vs_flush(void)
1422 struct ip_vs_service *svc, *nxt;
1425 * Flush the service table hashed by <protocol,addr,port>
1427 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1428 list_for_each_entry_safe(svc, nxt, &ip_vs_svc_table[idx], s_list) {
1429 write_lock_bh(&__ip_vs_svc_lock);
1430 ip_vs_svc_unhash(svc);
1432 * Wait until all the svc users go away.
1434 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
1435 __ip_vs_del_service(svc);
1436 write_unlock_bh(&__ip_vs_svc_lock);
1441 * Flush the service table hashed by fwmark
1443 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1444 list_for_each_entry_safe(svc, nxt,
1445 &ip_vs_svc_fwm_table[idx], f_list) {
1446 write_lock_bh(&__ip_vs_svc_lock);
1447 ip_vs_svc_unhash(svc);
1449 * Wait until all the svc users go away.
1451 IP_VS_WAIT_WHILE(atomic_read(&svc->usecnt) > 0);
1452 __ip_vs_del_service(svc);
1453 write_unlock_bh(&__ip_vs_svc_lock);
1462 * Zero counters in a service or all services
1464 static int ip_vs_zero_service(struct ip_vs_service *svc)
1466 struct ip_vs_dest *dest;
1468 write_lock_bh(&__ip_vs_svc_lock);
1469 list_for_each_entry(dest, &svc->destinations, n_list) {
1470 ip_vs_zero_stats(&dest->stats);
1472 ip_vs_zero_stats(&svc->stats);
1473 write_unlock_bh(&__ip_vs_svc_lock);
1477 static int ip_vs_zero_all(void)
1480 struct ip_vs_service *svc;
1482 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1483 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1484 ip_vs_zero_service(svc);
1488 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1489 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1490 ip_vs_zero_service(svc);
1494 ip_vs_zero_stats(&ip_vs_stats);
1500 proc_do_defense_mode(ctl_table *table, int write,
1501 void __user *buffer, size_t *lenp, loff_t *ppos)
1503 int *valp = table->data;
1507 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1508 if (write && (*valp != val)) {
1509 if ((*valp < 0) || (*valp > 3)) {
1510 /* Restore the correct value */
1513 update_defense_level();
1521 proc_do_sync_threshold(ctl_table *table, int write,
1522 void __user *buffer, size_t *lenp, loff_t *ppos)
1524 int *valp = table->data;
1528 /* backup the value first */
1529 memcpy(val, valp, sizeof(val));
1531 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1532 if (write && (valp[0] < 0 || valp[1] < 0 || valp[0] >= valp[1])) {
1533 /* Restore the correct value */
1534 memcpy(valp, val, sizeof(val));
1541 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1544 static struct ctl_table vs_vars[] = {
1546 .procname = "amemthresh",
1547 .data = &sysctl_ip_vs_amemthresh,
1548 .maxlen = sizeof(int),
1550 .proc_handler = proc_dointvec,
1552 #ifdef CONFIG_IP_VS_DEBUG
1554 .procname = "debug_level",
1555 .data = &sysctl_ip_vs_debug_level,
1556 .maxlen = sizeof(int),
1558 .proc_handler = proc_dointvec,
1562 .procname = "am_droprate",
1563 .data = &sysctl_ip_vs_am_droprate,
1564 .maxlen = sizeof(int),
1566 .proc_handler = proc_dointvec,
1569 .procname = "drop_entry",
1570 .data = &sysctl_ip_vs_drop_entry,
1571 .maxlen = sizeof(int),
1573 .proc_handler = proc_do_defense_mode,
1576 .procname = "drop_packet",
1577 .data = &sysctl_ip_vs_drop_packet,
1578 .maxlen = sizeof(int),
1580 .proc_handler = proc_do_defense_mode,
1583 .procname = "secure_tcp",
1584 .data = &sysctl_ip_vs_secure_tcp,
1585 .maxlen = sizeof(int),
1587 .proc_handler = proc_do_defense_mode,
1591 .procname = "timeout_established",
1592 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED],
1593 .maxlen = sizeof(int),
1595 .proc_handler = proc_dointvec_jiffies,
1598 .procname = "timeout_synsent",
1599 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT],
1600 .maxlen = sizeof(int),
1602 .proc_handler = proc_dointvec_jiffies,
1605 .procname = "timeout_synrecv",
1606 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV],
1607 .maxlen = sizeof(int),
1609 .proc_handler = proc_dointvec_jiffies,
1612 .procname = "timeout_finwait",
1613 .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT],
1614 .maxlen = sizeof(int),
1616 .proc_handler = proc_dointvec_jiffies,
1619 .procname = "timeout_timewait",
1620 .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT],
1621 .maxlen = sizeof(int),
1623 .proc_handler = proc_dointvec_jiffies,
1626 .procname = "timeout_close",
1627 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE],
1628 .maxlen = sizeof(int),
1630 .proc_handler = proc_dointvec_jiffies,
1633 .procname = "timeout_closewait",
1634 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT],
1635 .maxlen = sizeof(int),
1637 .proc_handler = proc_dointvec_jiffies,
1640 .procname = "timeout_lastack",
1641 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK],
1642 .maxlen = sizeof(int),
1644 .proc_handler = proc_dointvec_jiffies,
1647 .procname = "timeout_listen",
1648 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN],
1649 .maxlen = sizeof(int),
1651 .proc_handler = proc_dointvec_jiffies,
1654 .procname = "timeout_synack",
1655 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK],
1656 .maxlen = sizeof(int),
1658 .proc_handler = proc_dointvec_jiffies,
1661 .procname = "timeout_udp",
1662 .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP],
1663 .maxlen = sizeof(int),
1665 .proc_handler = proc_dointvec_jiffies,
1668 .procname = "timeout_icmp",
1669 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP],
1670 .maxlen = sizeof(int),
1672 .proc_handler = proc_dointvec_jiffies,
1676 .procname = "cache_bypass",
1677 .data = &sysctl_ip_vs_cache_bypass,
1678 .maxlen = sizeof(int),
1680 .proc_handler = proc_dointvec,
1683 .procname = "expire_nodest_conn",
1684 .data = &sysctl_ip_vs_expire_nodest_conn,
1685 .maxlen = sizeof(int),
1687 .proc_handler = proc_dointvec,
1690 .procname = "expire_quiescent_template",
1691 .data = &sysctl_ip_vs_expire_quiescent_template,
1692 .maxlen = sizeof(int),
1694 .proc_handler = proc_dointvec,
1697 .procname = "sync_threshold",
1698 .data = &sysctl_ip_vs_sync_threshold,
1699 .maxlen = sizeof(sysctl_ip_vs_sync_threshold),
1701 .proc_handler = proc_do_sync_threshold,
1704 .procname = "nat_icmp_send",
1705 .data = &sysctl_ip_vs_nat_icmp_send,
1706 .maxlen = sizeof(int),
1708 .proc_handler = proc_dointvec,
1713 const struct ctl_path net_vs_ctl_path[] = {
1714 { .procname = "net", },
1715 { .procname = "ipv4", },
1716 { .procname = "vs", },
1719 EXPORT_SYMBOL_GPL(net_vs_ctl_path);
1721 static struct ctl_table_header * sysctl_header;
1723 #ifdef CONFIG_PROC_FS
1726 struct list_head *table;
1731 * Write the contents of the VS rule table to a PROCfs file.
1732 * (It is kept just for backward compatibility)
1734 static inline const char *ip_vs_fwd_name(unsigned flags)
1736 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1737 case IP_VS_CONN_F_LOCALNODE:
1739 case IP_VS_CONN_F_TUNNEL:
1741 case IP_VS_CONN_F_DROUTE:
1749 /* Get the Nth entry in the two lists */
1750 static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1752 struct ip_vs_iter *iter = seq->private;
1754 struct ip_vs_service *svc;
1756 /* look in hash by protocol */
1757 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1758 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1760 iter->table = ip_vs_svc_table;
1767 /* keep looking in fwmark */
1768 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1769 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1771 iter->table = ip_vs_svc_fwm_table;
1781 static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1782 __acquires(__ip_vs_svc_lock)
1785 read_lock_bh(&__ip_vs_svc_lock);
1786 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1790 static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1792 struct list_head *e;
1793 struct ip_vs_iter *iter;
1794 struct ip_vs_service *svc;
1797 if (v == SEQ_START_TOKEN)
1798 return ip_vs_info_array(seq,0);
1801 iter = seq->private;
1803 if (iter->table == ip_vs_svc_table) {
1804 /* next service in table hashed by protocol */
1805 if ((e = svc->s_list.next) != &ip_vs_svc_table[iter->bucket])
1806 return list_entry(e, struct ip_vs_service, s_list);
1809 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1810 list_for_each_entry(svc,&ip_vs_svc_table[iter->bucket],
1816 iter->table = ip_vs_svc_fwm_table;
1821 /* next service in hashed by fwmark */
1822 if ((e = svc->f_list.next) != &ip_vs_svc_fwm_table[iter->bucket])
1823 return list_entry(e, struct ip_vs_service, f_list);
1826 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1827 list_for_each_entry(svc, &ip_vs_svc_fwm_table[iter->bucket],
1835 static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
1836 __releases(__ip_vs_svc_lock)
1838 read_unlock_bh(&__ip_vs_svc_lock);
1842 static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
1844 if (v == SEQ_START_TOKEN) {
1846 "IP Virtual Server version %d.%d.%d (size=%d)\n",
1847 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1849 "Prot LocalAddress:Port Scheduler Flags\n");
1851 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1853 const struct ip_vs_service *svc = v;
1854 const struct ip_vs_iter *iter = seq->private;
1855 const struct ip_vs_dest *dest;
1857 if (iter->table == ip_vs_svc_table) {
1858 #ifdef CONFIG_IP_VS_IPV6
1859 if (svc->af == AF_INET6)
1860 seq_printf(seq, "%s [%pI6]:%04X %s ",
1861 ip_vs_proto_name(svc->protocol),
1864 svc->scheduler->name);
1867 seq_printf(seq, "%s %08X:%04X %s %s ",
1868 ip_vs_proto_name(svc->protocol),
1869 ntohl(svc->addr.ip),
1871 svc->scheduler->name,
1872 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
1874 seq_printf(seq, "FWM %08X %s %s",
1875 svc->fwmark, svc->scheduler->name,
1876 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
1879 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
1880 seq_printf(seq, "persistent %d %08X\n",
1882 ntohl(svc->netmask));
1884 seq_putc(seq, '\n');
1886 list_for_each_entry(dest, &svc->destinations, n_list) {
1887 #ifdef CONFIG_IP_VS_IPV6
1888 if (dest->af == AF_INET6)
1891 " %-7s %-6d %-10d %-10d\n",
1894 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
1895 atomic_read(&dest->weight),
1896 atomic_read(&dest->activeconns),
1897 atomic_read(&dest->inactconns));
1902 "%-7s %-6d %-10d %-10d\n",
1903 ntohl(dest->addr.ip),
1905 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
1906 atomic_read(&dest->weight),
1907 atomic_read(&dest->activeconns),
1908 atomic_read(&dest->inactconns));
1915 static const struct seq_operations ip_vs_info_seq_ops = {
1916 .start = ip_vs_info_seq_start,
1917 .next = ip_vs_info_seq_next,
1918 .stop = ip_vs_info_seq_stop,
1919 .show = ip_vs_info_seq_show,
1922 static int ip_vs_info_open(struct inode *inode, struct file *file)
1924 return seq_open_private(file, &ip_vs_info_seq_ops,
1925 sizeof(struct ip_vs_iter));
1928 static const struct file_operations ip_vs_info_fops = {
1929 .owner = THIS_MODULE,
1930 .open = ip_vs_info_open,
1932 .llseek = seq_lseek,
1933 .release = seq_release_private,
1938 struct ip_vs_stats ip_vs_stats = {
1939 .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock),
1942 #ifdef CONFIG_PROC_FS
1943 static int ip_vs_stats_show(struct seq_file *seq, void *v)
1946 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1948 " Total Incoming Outgoing Incoming Outgoing\n");
1950 " Conns Packets Packets Bytes Bytes\n");
1952 spin_lock_bh(&ip_vs_stats.lock);
1953 seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.ustats.conns,
1954 ip_vs_stats.ustats.inpkts, ip_vs_stats.ustats.outpkts,
1955 (unsigned long long) ip_vs_stats.ustats.inbytes,
1956 (unsigned long long) ip_vs_stats.ustats.outbytes);
1958 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1960 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
1961 seq_printf(seq,"%8X %8X %8X %16X %16X\n",
1962 ip_vs_stats.ustats.cps,
1963 ip_vs_stats.ustats.inpps,
1964 ip_vs_stats.ustats.outpps,
1965 ip_vs_stats.ustats.inbps,
1966 ip_vs_stats.ustats.outbps);
1967 spin_unlock_bh(&ip_vs_stats.lock);
1972 static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
1974 return single_open(file, ip_vs_stats_show, NULL);
1977 static const struct file_operations ip_vs_stats_fops = {
1978 .owner = THIS_MODULE,
1979 .open = ip_vs_stats_seq_open,
1981 .llseek = seq_lseek,
1982 .release = single_release,
1988 * Set timeout values for tcp tcpfin udp in the timeout_table.
1990 static int ip_vs_set_timeout(struct ip_vs_timeout_user *u)
1992 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
1997 #ifdef CONFIG_IP_VS_PROTO_TCP
1998 if (u->tcp_timeout) {
1999 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED]
2000 = u->tcp_timeout * HZ;
2003 if (u->tcp_fin_timeout) {
2004 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT]
2005 = u->tcp_fin_timeout * HZ;
2009 #ifdef CONFIG_IP_VS_PROTO_UDP
2010 if (u->udp_timeout) {
2011 ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL]
2012 = u->udp_timeout * HZ;
2019 #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2020 #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
2021 #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
2022 sizeof(struct ip_vs_dest_user))
2023 #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2024 #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
2025 #define MAX_ARG_LEN SVCDEST_ARG_LEN
2027 static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
2028 [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
2029 [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
2030 [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
2031 [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
2032 [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
2033 [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
2034 [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
2035 [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
2036 [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
2037 [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
2038 [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
2041 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2042 struct ip_vs_service_user *usvc_compat)
2045 usvc->protocol = usvc_compat->protocol;
2046 usvc->addr.ip = usvc_compat->addr;
2047 usvc->port = usvc_compat->port;
2048 usvc->fwmark = usvc_compat->fwmark;
2050 /* Deep copy of sched_name is not needed here */
2051 usvc->sched_name = usvc_compat->sched_name;
2053 usvc->flags = usvc_compat->flags;
2054 usvc->timeout = usvc_compat->timeout;
2055 usvc->netmask = usvc_compat->netmask;
2058 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2059 struct ip_vs_dest_user *udest_compat)
2061 udest->addr.ip = udest_compat->addr;
2062 udest->port = udest_compat->port;
2063 udest->conn_flags = udest_compat->conn_flags;
2064 udest->weight = udest_compat->weight;
2065 udest->u_threshold = udest_compat->u_threshold;
2066 udest->l_threshold = udest_compat->l_threshold;
2070 do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2073 unsigned char arg[MAX_ARG_LEN];
2074 struct ip_vs_service_user *usvc_compat;
2075 struct ip_vs_service_user_kern usvc;
2076 struct ip_vs_service *svc;
2077 struct ip_vs_dest_user *udest_compat;
2078 struct ip_vs_dest_user_kern udest;
2080 if (!capable(CAP_NET_ADMIN))
2083 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2085 if (len < 0 || len > MAX_ARG_LEN)
2087 if (len != set_arglen[SET_CMDID(cmd)]) {
2088 pr_err("set_ctl: len %u != %u\n",
2089 len, set_arglen[SET_CMDID(cmd)]);
2093 if (copy_from_user(arg, user, len) != 0)
2096 /* increase the module use count */
2097 ip_vs_use_count_inc();
2099 if (mutex_lock_interruptible(&__ip_vs_mutex)) {
2104 if (cmd == IP_VS_SO_SET_FLUSH) {
2105 /* Flush the virtual service */
2106 ret = ip_vs_flush();
2108 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2109 /* Set timeout values for (tcp tcpfin udp) */
2110 ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg);
2112 } else if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2113 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2114 ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid);
2116 } else if (cmd == IP_VS_SO_SET_STOPDAEMON) {
2117 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2118 ret = stop_sync_thread(dm->state);
2122 usvc_compat = (struct ip_vs_service_user *)arg;
2123 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2125 /* We only use the new structs internally, so copy userspace compat
2126 * structs to extended internal versions */
2127 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2128 ip_vs_copy_udest_compat(&udest, udest_compat);
2130 if (cmd == IP_VS_SO_SET_ZERO) {
2131 /* if no service address is set, zero counters in all */
2132 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2133 ret = ip_vs_zero_all();
2138 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2139 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2140 usvc.protocol != IPPROTO_SCTP) {
2141 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2142 usvc.protocol, &usvc.addr.ip,
2143 ntohs(usvc.port), usvc.sched_name);
2148 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2149 if (usvc.fwmark == 0)
2150 svc = __ip_vs_service_get(usvc.af, usvc.protocol,
2151 &usvc.addr, usvc.port);
2153 svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
2155 if (cmd != IP_VS_SO_SET_ADD
2156 && (svc == NULL || svc->protocol != usvc.protocol)) {
2162 case IP_VS_SO_SET_ADD:
2166 ret = ip_vs_add_service(&usvc, &svc);
2168 case IP_VS_SO_SET_EDIT:
2169 ret = ip_vs_edit_service(svc, &usvc);
2171 case IP_VS_SO_SET_DEL:
2172 ret = ip_vs_del_service(svc);
2176 case IP_VS_SO_SET_ZERO:
2177 ret = ip_vs_zero_service(svc);
2179 case IP_VS_SO_SET_ADDDEST:
2180 ret = ip_vs_add_dest(svc, &udest);
2182 case IP_VS_SO_SET_EDITDEST:
2183 ret = ip_vs_edit_dest(svc, &udest);
2185 case IP_VS_SO_SET_DELDEST:
2186 ret = ip_vs_del_dest(svc, &udest);
2193 ip_vs_service_put(svc);
2196 mutex_unlock(&__ip_vs_mutex);
2198 /* decrease the module use count */
2199 ip_vs_use_count_dec();
2206 ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
2208 spin_lock_bh(&src->lock);
2209 memcpy(dst, &src->ustats, sizeof(*dst));
2210 spin_unlock_bh(&src->lock);
2214 ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2216 dst->protocol = src->protocol;
2217 dst->addr = src->addr.ip;
2218 dst->port = src->port;
2219 dst->fwmark = src->fwmark;
2220 strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name));
2221 dst->flags = src->flags;
2222 dst->timeout = src->timeout / HZ;
2223 dst->netmask = src->netmask;
2224 dst->num_dests = src->num_dests;
2225 ip_vs_copy_stats(&dst->stats, &src->stats);
2229 __ip_vs_get_service_entries(const struct ip_vs_get_services *get,
2230 struct ip_vs_get_services __user *uptr)
2233 struct ip_vs_service *svc;
2234 struct ip_vs_service_entry entry;
2237 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2238 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2239 /* Only expose IPv4 entries to old interface */
2240 if (svc->af != AF_INET)
2243 if (count >= get->num_services)
2245 memset(&entry, 0, sizeof(entry));
2246 ip_vs_copy_service(&entry, svc);
2247 if (copy_to_user(&uptr->entrytable[count],
2248 &entry, sizeof(entry))) {
2256 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2257 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2258 /* Only expose IPv4 entries to old interface */
2259 if (svc->af != AF_INET)
2262 if (count >= get->num_services)
2264 memset(&entry, 0, sizeof(entry));
2265 ip_vs_copy_service(&entry, svc);
2266 if (copy_to_user(&uptr->entrytable[count],
2267 &entry, sizeof(entry))) {
2279 __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get,
2280 struct ip_vs_get_dests __user *uptr)
2282 struct ip_vs_service *svc;
2283 union nf_inet_addr addr = { .ip = get->addr };
2287 svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark);
2289 svc = __ip_vs_service_get(AF_INET, get->protocol, &addr,
2294 struct ip_vs_dest *dest;
2295 struct ip_vs_dest_entry entry;
2297 list_for_each_entry(dest, &svc->destinations, n_list) {
2298 if (count >= get->num_dests)
2301 entry.addr = dest->addr.ip;
2302 entry.port = dest->port;
2303 entry.conn_flags = atomic_read(&dest->conn_flags);
2304 entry.weight = atomic_read(&dest->weight);
2305 entry.u_threshold = dest->u_threshold;
2306 entry.l_threshold = dest->l_threshold;
2307 entry.activeconns = atomic_read(&dest->activeconns);
2308 entry.inactconns = atomic_read(&dest->inactconns);
2309 entry.persistconns = atomic_read(&dest->persistconns);
2310 ip_vs_copy_stats(&entry.stats, &dest->stats);
2311 if (copy_to_user(&uptr->entrytable[count],
2312 &entry, sizeof(entry))) {
2318 ip_vs_service_put(svc);
2325 __ip_vs_get_timeouts(struct ip_vs_timeout_user *u)
2327 #ifdef CONFIG_IP_VS_PROTO_TCP
2329 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2330 u->tcp_fin_timeout =
2331 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2333 #ifdef CONFIG_IP_VS_PROTO_UDP
2335 ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2340 #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2341 #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
2342 #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
2343 #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
2344 #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
2345 #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2346 #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
2348 static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
2349 [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
2350 [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
2351 [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
2352 [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
2353 [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
2354 [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
2355 [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
2359 do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2361 unsigned char arg[128];
2363 unsigned int copylen;
2365 if (!capable(CAP_NET_ADMIN))
2368 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2371 if (*len < get_arglen[GET_CMDID(cmd)]) {
2372 pr_err("get_ctl: len %u < %u\n",
2373 *len, get_arglen[GET_CMDID(cmd)]);
2377 copylen = get_arglen[GET_CMDID(cmd)];
2381 if (copy_from_user(arg, user, copylen) != 0)
2384 if (mutex_lock_interruptible(&__ip_vs_mutex))
2385 return -ERESTARTSYS;
2388 case IP_VS_SO_GET_VERSION:
2392 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2393 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2394 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2398 *len = strlen(buf)+1;
2402 case IP_VS_SO_GET_INFO:
2404 struct ip_vs_getinfo info;
2405 info.version = IP_VS_VERSION_CODE;
2406 info.size = ip_vs_conn_tab_size;
2407 info.num_services = ip_vs_num_services;
2408 if (copy_to_user(user, &info, sizeof(info)) != 0)
2413 case IP_VS_SO_GET_SERVICES:
2415 struct ip_vs_get_services *get;
2418 get = (struct ip_vs_get_services *)arg;
2419 size = sizeof(*get) +
2420 sizeof(struct ip_vs_service_entry) * get->num_services;
2422 pr_err("length: %u != %u\n", *len, size);
2426 ret = __ip_vs_get_service_entries(get, user);
2430 case IP_VS_SO_GET_SERVICE:
2432 struct ip_vs_service_entry *entry;
2433 struct ip_vs_service *svc;
2434 union nf_inet_addr addr;
2436 entry = (struct ip_vs_service_entry *)arg;
2437 addr.ip = entry->addr;
2439 svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark);
2441 svc = __ip_vs_service_get(AF_INET, entry->protocol,
2442 &addr, entry->port);
2444 ip_vs_copy_service(entry, svc);
2445 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2447 ip_vs_service_put(svc);
2453 case IP_VS_SO_GET_DESTS:
2455 struct ip_vs_get_dests *get;
2458 get = (struct ip_vs_get_dests *)arg;
2459 size = sizeof(*get) +
2460 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2462 pr_err("length: %u != %u\n", *len, size);
2466 ret = __ip_vs_get_dest_entries(get, user);
2470 case IP_VS_SO_GET_TIMEOUT:
2472 struct ip_vs_timeout_user t;
2474 __ip_vs_get_timeouts(&t);
2475 if (copy_to_user(user, &t, sizeof(t)) != 0)
2480 case IP_VS_SO_GET_DAEMON:
2482 struct ip_vs_daemon_user d[2];
2484 memset(&d, 0, sizeof(d));
2485 if (ip_vs_sync_state & IP_VS_STATE_MASTER) {
2486 d[0].state = IP_VS_STATE_MASTER;
2487 strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn));
2488 d[0].syncid = ip_vs_master_syncid;
2490 if (ip_vs_sync_state & IP_VS_STATE_BACKUP) {
2491 d[1].state = IP_VS_STATE_BACKUP;
2492 strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn));
2493 d[1].syncid = ip_vs_backup_syncid;
2495 if (copy_to_user(user, &d, sizeof(d)) != 0)
2505 mutex_unlock(&__ip_vs_mutex);
2510 static struct nf_sockopt_ops ip_vs_sockopts = {
2512 .set_optmin = IP_VS_BASE_CTL,
2513 .set_optmax = IP_VS_SO_SET_MAX+1,
2514 .set = do_ip_vs_set_ctl,
2515 .get_optmin = IP_VS_BASE_CTL,
2516 .get_optmax = IP_VS_SO_GET_MAX+1,
2517 .get = do_ip_vs_get_ctl,
2518 .owner = THIS_MODULE,
2522 * Generic Netlink interface
2525 /* IPVS genetlink family */
2526 static struct genl_family ip_vs_genl_family = {
2527 .id = GENL_ID_GENERATE,
2529 .name = IPVS_GENL_NAME,
2530 .version = IPVS_GENL_VERSION,
2531 .maxattr = IPVS_CMD_MAX,
2534 /* Policy used for first-level command attributes */
2535 static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2536 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2537 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2538 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2539 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2540 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2541 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2544 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2545 static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2546 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2547 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2548 .len = IP_VS_IFNAME_MAXLEN },
2549 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2552 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2553 static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2554 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2555 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2556 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2557 .len = sizeof(union nf_inet_addr) },
2558 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2559 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2560 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2561 .len = IP_VS_SCHEDNAME_MAXLEN },
2562 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2563 .len = sizeof(struct ip_vs_flags) },
2564 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2565 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2566 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2569 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2570 static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2571 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2572 .len = sizeof(union nf_inet_addr) },
2573 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2574 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2575 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2576 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2577 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2578 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2579 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2580 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2581 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2584 static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2585 struct ip_vs_stats *stats)
2587 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2591 spin_lock_bh(&stats->lock);
2593 NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->ustats.conns);
2594 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->ustats.inpkts);
2595 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->ustats.outpkts);
2596 NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->ustats.inbytes);
2597 NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->ustats.outbytes);
2598 NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->ustats.cps);
2599 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->ustats.inpps);
2600 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->ustats.outpps);
2601 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->ustats.inbps);
2602 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->ustats.outbps);
2604 spin_unlock_bh(&stats->lock);
2606 nla_nest_end(skb, nl_stats);
2611 spin_unlock_bh(&stats->lock);
2612 nla_nest_cancel(skb, nl_stats);
2616 static int ip_vs_genl_fill_service(struct sk_buff *skb,
2617 struct ip_vs_service *svc)
2619 struct nlattr *nl_service;
2620 struct ip_vs_flags flags = { .flags = svc->flags,
2623 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2627 NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, svc->af);
2630 NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark);
2632 NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol);
2633 NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr);
2634 NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port);
2637 NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name);
2638 NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags);
2639 NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ);
2640 NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask);
2642 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
2643 goto nla_put_failure;
2645 nla_nest_end(skb, nl_service);
2650 nla_nest_cancel(skb, nl_service);
2654 static int ip_vs_genl_dump_service(struct sk_buff *skb,
2655 struct ip_vs_service *svc,
2656 struct netlink_callback *cb)
2660 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2661 &ip_vs_genl_family, NLM_F_MULTI,
2662 IPVS_CMD_NEW_SERVICE);
2666 if (ip_vs_genl_fill_service(skb, svc) < 0)
2667 goto nla_put_failure;
2669 return genlmsg_end(skb, hdr);
2672 genlmsg_cancel(skb, hdr);
2676 static int ip_vs_genl_dump_services(struct sk_buff *skb,
2677 struct netlink_callback *cb)
2680 int start = cb->args[0];
2681 struct ip_vs_service *svc;
2683 mutex_lock(&__ip_vs_mutex);
2684 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2685 list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
2688 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2690 goto nla_put_failure;
2695 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2696 list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
2699 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2701 goto nla_put_failure;
2707 mutex_unlock(&__ip_vs_mutex);
2713 static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc,
2714 struct nlattr *nla, int full_entry)
2716 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
2717 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
2719 /* Parse mandatory identifying service fields first */
2721 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
2724 nla_af = attrs[IPVS_SVC_ATTR_AF];
2725 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
2726 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
2727 nla_port = attrs[IPVS_SVC_ATTR_PORT];
2728 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
2730 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
2733 memset(usvc, 0, sizeof(*usvc));
2735 usvc->af = nla_get_u16(nla_af);
2736 #ifdef CONFIG_IP_VS_IPV6
2737 if (usvc->af != AF_INET && usvc->af != AF_INET6)
2739 if (usvc->af != AF_INET)
2741 return -EAFNOSUPPORT;
2744 usvc->protocol = IPPROTO_TCP;
2745 usvc->fwmark = nla_get_u32(nla_fwmark);
2747 usvc->protocol = nla_get_u16(nla_protocol);
2748 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
2749 usvc->port = nla_get_u16(nla_port);
2753 /* If a full entry was requested, check for the additional fields */
2755 struct nlattr *nla_sched, *nla_flags, *nla_timeout,
2757 struct ip_vs_flags flags;
2758 struct ip_vs_service *svc;
2760 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
2761 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
2762 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
2763 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
2765 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
2768 nla_memcpy(&flags, nla_flags, sizeof(flags));
2770 /* prefill flags from service if it already exists */
2772 svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark);
2774 svc = __ip_vs_service_get(usvc->af, usvc->protocol,
2775 &usvc->addr, usvc->port);
2777 usvc->flags = svc->flags;
2778 ip_vs_service_put(svc);
2782 /* set new flags from userland */
2783 usvc->flags = (usvc->flags & ~flags.mask) |
2784 (flags.flags & flags.mask);
2785 usvc->sched_name = nla_data(nla_sched);
2786 usvc->timeout = nla_get_u32(nla_timeout);
2787 usvc->netmask = nla_get_u32(nla_netmask);
2793 static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla)
2795 struct ip_vs_service_user_kern usvc;
2798 ret = ip_vs_genl_parse_service(&usvc, nla, 0);
2800 return ERR_PTR(ret);
2803 return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
2805 return __ip_vs_service_get(usvc.af, usvc.protocol,
2806 &usvc.addr, usvc.port);
2809 static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
2811 struct nlattr *nl_dest;
2813 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
2817 NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr);
2818 NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port);
2820 NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD,
2821 atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK);
2822 NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight));
2823 NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold);
2824 NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold);
2825 NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
2826 atomic_read(&dest->activeconns));
2827 NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS,
2828 atomic_read(&dest->inactconns));
2829 NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
2830 atomic_read(&dest->persistconns));
2832 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
2833 goto nla_put_failure;
2835 nla_nest_end(skb, nl_dest);
2840 nla_nest_cancel(skb, nl_dest);
2844 static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
2845 struct netlink_callback *cb)
2849 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2850 &ip_vs_genl_family, NLM_F_MULTI,
2855 if (ip_vs_genl_fill_dest(skb, dest) < 0)
2856 goto nla_put_failure;
2858 return genlmsg_end(skb, hdr);
2861 genlmsg_cancel(skb, hdr);
2865 static int ip_vs_genl_dump_dests(struct sk_buff *skb,
2866 struct netlink_callback *cb)
2869 int start = cb->args[0];
2870 struct ip_vs_service *svc;
2871 struct ip_vs_dest *dest;
2872 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
2874 mutex_lock(&__ip_vs_mutex);
2876 /* Try to find the service for which to dump destinations */
2877 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
2878 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
2881 svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]);
2882 if (IS_ERR(svc) || svc == NULL)
2885 /* Dump the destinations */
2886 list_for_each_entry(dest, &svc->destinations, n_list) {
2889 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
2891 goto nla_put_failure;
2897 ip_vs_service_put(svc);
2900 mutex_unlock(&__ip_vs_mutex);
2905 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
2906 struct nlattr *nla, int full_entry)
2908 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
2909 struct nlattr *nla_addr, *nla_port;
2911 /* Parse mandatory identifying destination fields first */
2913 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
2916 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
2917 nla_port = attrs[IPVS_DEST_ATTR_PORT];
2919 if (!(nla_addr && nla_port))
2922 memset(udest, 0, sizeof(*udest));
2924 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
2925 udest->port = nla_get_u16(nla_port);
2927 /* If a full entry was requested, check for the additional fields */
2929 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
2932 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
2933 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
2934 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
2935 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
2937 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
2940 udest->conn_flags = nla_get_u32(nla_fwd)
2941 & IP_VS_CONN_F_FWD_MASK;
2942 udest->weight = nla_get_u32(nla_weight);
2943 udest->u_threshold = nla_get_u32(nla_u_thresh);
2944 udest->l_threshold = nla_get_u32(nla_l_thresh);
2950 static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state,
2951 const char *mcast_ifn, __be32 syncid)
2953 struct nlattr *nl_daemon;
2955 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
2959 NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state);
2960 NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn);
2961 NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid);
2963 nla_nest_end(skb, nl_daemon);
2968 nla_nest_cancel(skb, nl_daemon);
2972 static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state,
2973 const char *mcast_ifn, __be32 syncid,
2974 struct netlink_callback *cb)
2977 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2978 &ip_vs_genl_family, NLM_F_MULTI,
2979 IPVS_CMD_NEW_DAEMON);
2983 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
2984 goto nla_put_failure;
2986 return genlmsg_end(skb, hdr);
2989 genlmsg_cancel(skb, hdr);
2993 static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
2994 struct netlink_callback *cb)
2996 mutex_lock(&__ip_vs_mutex);
2997 if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
2998 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
2999 ip_vs_master_mcast_ifn,
3000 ip_vs_master_syncid, cb) < 0)
3001 goto nla_put_failure;
3006 if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3007 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3008 ip_vs_backup_mcast_ifn,
3009 ip_vs_backup_syncid, cb) < 0)
3010 goto nla_put_failure;
3016 mutex_unlock(&__ip_vs_mutex);
3021 static int ip_vs_genl_new_daemon(struct nlattr **attrs)
3023 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3024 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3025 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3028 return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
3029 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3030 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3033 static int ip_vs_genl_del_daemon(struct nlattr **attrs)
3035 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3038 return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3041 static int ip_vs_genl_set_config(struct nlattr **attrs)
3043 struct ip_vs_timeout_user t;
3045 __ip_vs_get_timeouts(&t);
3047 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3048 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3050 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3052 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3054 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3055 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3057 return ip_vs_set_timeout(&t);
3060 static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3062 struct ip_vs_service *svc = NULL;
3063 struct ip_vs_service_user_kern usvc;
3064 struct ip_vs_dest_user_kern udest;
3066 int need_full_svc = 0, need_full_dest = 0;
3068 cmd = info->genlhdr->cmd;
3070 mutex_lock(&__ip_vs_mutex);
3072 if (cmd == IPVS_CMD_FLUSH) {
3073 ret = ip_vs_flush();
3075 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3076 ret = ip_vs_genl_set_config(info->attrs);
3078 } else if (cmd == IPVS_CMD_NEW_DAEMON ||
3079 cmd == IPVS_CMD_DEL_DAEMON) {
3081 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3083 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3084 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3085 info->attrs[IPVS_CMD_ATTR_DAEMON],
3086 ip_vs_daemon_policy)) {
3091 if (cmd == IPVS_CMD_NEW_DAEMON)
3092 ret = ip_vs_genl_new_daemon(daemon_attrs);
3094 ret = ip_vs_genl_del_daemon(daemon_attrs);
3096 } else if (cmd == IPVS_CMD_ZERO &&
3097 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3098 ret = ip_vs_zero_all();
3102 /* All following commands require a service argument, so check if we
3103 * received a valid one. We need a full service specification when
3104 * adding / editing a service. Only identifying members otherwise. */
3105 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3108 ret = ip_vs_genl_parse_service(&usvc,
3109 info->attrs[IPVS_CMD_ATTR_SERVICE],
3114 /* Lookup the exact service by <protocol, addr, port> or fwmark */
3115 if (usvc.fwmark == 0)
3116 svc = __ip_vs_service_get(usvc.af, usvc.protocol,
3117 &usvc.addr, usvc.port);
3119 svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
3121 /* Unless we're adding a new service, the service must already exist */
3122 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3127 /* Destination commands require a valid destination argument. For
3128 * adding / editing a destination, we need a full destination
3130 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3131 cmd == IPVS_CMD_DEL_DEST) {
3132 if (cmd != IPVS_CMD_DEL_DEST)
3135 ret = ip_vs_genl_parse_dest(&udest,
3136 info->attrs[IPVS_CMD_ATTR_DEST],
3143 case IPVS_CMD_NEW_SERVICE:
3145 ret = ip_vs_add_service(&usvc, &svc);
3149 case IPVS_CMD_SET_SERVICE:
3150 ret = ip_vs_edit_service(svc, &usvc);
3152 case IPVS_CMD_DEL_SERVICE:
3153 ret = ip_vs_del_service(svc);
3155 case IPVS_CMD_NEW_DEST:
3156 ret = ip_vs_add_dest(svc, &udest);
3158 case IPVS_CMD_SET_DEST:
3159 ret = ip_vs_edit_dest(svc, &udest);
3161 case IPVS_CMD_DEL_DEST:
3162 ret = ip_vs_del_dest(svc, &udest);
3165 ret = ip_vs_zero_service(svc);
3173 ip_vs_service_put(svc);
3174 mutex_unlock(&__ip_vs_mutex);
3179 static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3181 struct sk_buff *msg;
3183 int ret, cmd, reply_cmd;
3185 cmd = info->genlhdr->cmd;
3187 if (cmd == IPVS_CMD_GET_SERVICE)
3188 reply_cmd = IPVS_CMD_NEW_SERVICE;
3189 else if (cmd == IPVS_CMD_GET_INFO)
3190 reply_cmd = IPVS_CMD_SET_INFO;
3191 else if (cmd == IPVS_CMD_GET_CONFIG)
3192 reply_cmd = IPVS_CMD_SET_CONFIG;
3194 pr_err("unknown Generic Netlink command\n");
3198 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3202 mutex_lock(&__ip_vs_mutex);
3204 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3206 goto nla_put_failure;
3209 case IPVS_CMD_GET_SERVICE:
3211 struct ip_vs_service *svc;
3213 svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]);
3218 ret = ip_vs_genl_fill_service(msg, svc);
3219 ip_vs_service_put(svc);
3221 goto nla_put_failure;
3230 case IPVS_CMD_GET_CONFIG:
3232 struct ip_vs_timeout_user t;
3234 __ip_vs_get_timeouts(&t);
3235 #ifdef CONFIG_IP_VS_PROTO_TCP
3236 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout);
3237 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3240 #ifdef CONFIG_IP_VS_PROTO_UDP
3241 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout);
3247 case IPVS_CMD_GET_INFO:
3248 NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE);
3249 NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3250 ip_vs_conn_tab_size);
3254 genlmsg_end(msg, reply);
3255 ret = genlmsg_reply(msg, info);
3259 pr_err("not enough space in Netlink message\n");
3265 mutex_unlock(&__ip_vs_mutex);
3271 static struct genl_ops ip_vs_genl_ops[] __read_mostly = {
3273 .cmd = IPVS_CMD_NEW_SERVICE,
3274 .flags = GENL_ADMIN_PERM,
3275 .policy = ip_vs_cmd_policy,
3276 .doit = ip_vs_genl_set_cmd,
3279 .cmd = IPVS_CMD_SET_SERVICE,
3280 .flags = GENL_ADMIN_PERM,
3281 .policy = ip_vs_cmd_policy,
3282 .doit = ip_vs_genl_set_cmd,
3285 .cmd = IPVS_CMD_DEL_SERVICE,
3286 .flags = GENL_ADMIN_PERM,
3287 .policy = ip_vs_cmd_policy,
3288 .doit = ip_vs_genl_set_cmd,
3291 .cmd = IPVS_CMD_GET_SERVICE,
3292 .flags = GENL_ADMIN_PERM,
3293 .doit = ip_vs_genl_get_cmd,
3294 .dumpit = ip_vs_genl_dump_services,
3295 .policy = ip_vs_cmd_policy,
3298 .cmd = IPVS_CMD_NEW_DEST,
3299 .flags = GENL_ADMIN_PERM,
3300 .policy = ip_vs_cmd_policy,
3301 .doit = ip_vs_genl_set_cmd,
3304 .cmd = IPVS_CMD_SET_DEST,
3305 .flags = GENL_ADMIN_PERM,
3306 .policy = ip_vs_cmd_policy,
3307 .doit = ip_vs_genl_set_cmd,
3310 .cmd = IPVS_CMD_DEL_DEST,
3311 .flags = GENL_ADMIN_PERM,
3312 .policy = ip_vs_cmd_policy,
3313 .doit = ip_vs_genl_set_cmd,
3316 .cmd = IPVS_CMD_GET_DEST,
3317 .flags = GENL_ADMIN_PERM,
3318 .policy = ip_vs_cmd_policy,
3319 .dumpit = ip_vs_genl_dump_dests,
3322 .cmd = IPVS_CMD_NEW_DAEMON,
3323 .flags = GENL_ADMIN_PERM,
3324 .policy = ip_vs_cmd_policy,
3325 .doit = ip_vs_genl_set_cmd,
3328 .cmd = IPVS_CMD_DEL_DAEMON,
3329 .flags = GENL_ADMIN_PERM,
3330 .policy = ip_vs_cmd_policy,
3331 .doit = ip_vs_genl_set_cmd,
3334 .cmd = IPVS_CMD_GET_DAEMON,
3335 .flags = GENL_ADMIN_PERM,
3336 .dumpit = ip_vs_genl_dump_daemons,
3339 .cmd = IPVS_CMD_SET_CONFIG,
3340 .flags = GENL_ADMIN_PERM,
3341 .policy = ip_vs_cmd_policy,
3342 .doit = ip_vs_genl_set_cmd,
3345 .cmd = IPVS_CMD_GET_CONFIG,
3346 .flags = GENL_ADMIN_PERM,
3347 .doit = ip_vs_genl_get_cmd,
3350 .cmd = IPVS_CMD_GET_INFO,
3351 .flags = GENL_ADMIN_PERM,
3352 .doit = ip_vs_genl_get_cmd,
3355 .cmd = IPVS_CMD_ZERO,
3356 .flags = GENL_ADMIN_PERM,
3357 .policy = ip_vs_cmd_policy,
3358 .doit = ip_vs_genl_set_cmd,
3361 .cmd = IPVS_CMD_FLUSH,
3362 .flags = GENL_ADMIN_PERM,
3363 .doit = ip_vs_genl_set_cmd,
3367 static int __init ip_vs_genl_register(void)
3369 return genl_register_family_with_ops(&ip_vs_genl_family,
3370 ip_vs_genl_ops, ARRAY_SIZE(ip_vs_genl_ops));
3373 static void ip_vs_genl_unregister(void)
3375 genl_unregister_family(&ip_vs_genl_family);
3378 /* End of Generic Netlink interface definitions */
3381 int __init ip_vs_control_init(void)
3388 ret = nf_register_sockopt(&ip_vs_sockopts);
3390 pr_err("cannot register sockopt.\n");
3394 ret = ip_vs_genl_register();
3396 pr_err("cannot register Generic Netlink interface.\n");
3397 nf_unregister_sockopt(&ip_vs_sockopts);
3401 proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops);
3402 proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops);
3404 sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars);
3406 /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
3407 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
3408 INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
3409 INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
3411 for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) {
3412 INIT_LIST_HEAD(&ip_vs_rtable[idx]);
3415 ip_vs_new_estimator(&ip_vs_stats);
3417 /* Hook the defense timer */
3418 schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
3425 void ip_vs_control_cleanup(void)
3428 ip_vs_trash_cleanup();
3429 cancel_rearming_delayed_work(&defense_work);
3430 cancel_work_sync(&defense_work.work);
3431 ip_vs_kill_estimator(&ip_vs_stats);
3432 unregister_sysctl_table(sysctl_header);
3433 proc_net_remove(&init_net, "ip_vs_stats");
3434 proc_net_remove(&init_net, "ip_vs");
3435 ip_vs_genl_unregister();
3436 nf_unregister_sockopt(&ip_vs_sockopts);