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 ",
1868 ip_vs_proto_name(svc->protocol),
1869 ntohl(svc->addr.ip),
1871 svc->scheduler->name);
1873 seq_printf(seq, "FWM %08X %s ",
1874 svc->fwmark, svc->scheduler->name);
1877 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
1878 seq_printf(seq, "persistent %d %08X\n",
1880 ntohl(svc->netmask));
1882 seq_putc(seq, '\n');
1884 list_for_each_entry(dest, &svc->destinations, n_list) {
1885 #ifdef CONFIG_IP_VS_IPV6
1886 if (dest->af == AF_INET6)
1889 " %-7s %-6d %-10d %-10d\n",
1892 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
1893 atomic_read(&dest->weight),
1894 atomic_read(&dest->activeconns),
1895 atomic_read(&dest->inactconns));
1900 "%-7s %-6d %-10d %-10d\n",
1901 ntohl(dest->addr.ip),
1903 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
1904 atomic_read(&dest->weight),
1905 atomic_read(&dest->activeconns),
1906 atomic_read(&dest->inactconns));
1913 static const struct seq_operations ip_vs_info_seq_ops = {
1914 .start = ip_vs_info_seq_start,
1915 .next = ip_vs_info_seq_next,
1916 .stop = ip_vs_info_seq_stop,
1917 .show = ip_vs_info_seq_show,
1920 static int ip_vs_info_open(struct inode *inode, struct file *file)
1922 return seq_open_private(file, &ip_vs_info_seq_ops,
1923 sizeof(struct ip_vs_iter));
1926 static const struct file_operations ip_vs_info_fops = {
1927 .owner = THIS_MODULE,
1928 .open = ip_vs_info_open,
1930 .llseek = seq_lseek,
1931 .release = seq_release_private,
1936 struct ip_vs_stats ip_vs_stats = {
1937 .lock = __SPIN_LOCK_UNLOCKED(ip_vs_stats.lock),
1940 #ifdef CONFIG_PROC_FS
1941 static int ip_vs_stats_show(struct seq_file *seq, void *v)
1944 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1946 " Total Incoming Outgoing Incoming Outgoing\n");
1948 " Conns Packets Packets Bytes Bytes\n");
1950 spin_lock_bh(&ip_vs_stats.lock);
1951 seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", ip_vs_stats.ustats.conns,
1952 ip_vs_stats.ustats.inpkts, ip_vs_stats.ustats.outpkts,
1953 (unsigned long long) ip_vs_stats.ustats.inbytes,
1954 (unsigned long long) ip_vs_stats.ustats.outbytes);
1956 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
1958 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
1959 seq_printf(seq,"%8X %8X %8X %16X %16X\n",
1960 ip_vs_stats.ustats.cps,
1961 ip_vs_stats.ustats.inpps,
1962 ip_vs_stats.ustats.outpps,
1963 ip_vs_stats.ustats.inbps,
1964 ip_vs_stats.ustats.outbps);
1965 spin_unlock_bh(&ip_vs_stats.lock);
1970 static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
1972 return single_open(file, ip_vs_stats_show, NULL);
1975 static const struct file_operations ip_vs_stats_fops = {
1976 .owner = THIS_MODULE,
1977 .open = ip_vs_stats_seq_open,
1979 .llseek = seq_lseek,
1980 .release = single_release,
1986 * Set timeout values for tcp tcpfin udp in the timeout_table.
1988 static int ip_vs_set_timeout(struct ip_vs_timeout_user *u)
1990 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
1995 #ifdef CONFIG_IP_VS_PROTO_TCP
1996 if (u->tcp_timeout) {
1997 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED]
1998 = u->tcp_timeout * HZ;
2001 if (u->tcp_fin_timeout) {
2002 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT]
2003 = u->tcp_fin_timeout * HZ;
2007 #ifdef CONFIG_IP_VS_PROTO_UDP
2008 if (u->udp_timeout) {
2009 ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL]
2010 = u->udp_timeout * HZ;
2017 #define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2018 #define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
2019 #define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
2020 sizeof(struct ip_vs_dest_user))
2021 #define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2022 #define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
2023 #define MAX_ARG_LEN SVCDEST_ARG_LEN
2025 static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
2026 [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
2027 [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
2028 [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
2029 [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
2030 [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
2031 [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
2032 [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
2033 [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
2034 [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
2035 [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
2036 [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
2039 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2040 struct ip_vs_service_user *usvc_compat)
2043 usvc->protocol = usvc_compat->protocol;
2044 usvc->addr.ip = usvc_compat->addr;
2045 usvc->port = usvc_compat->port;
2046 usvc->fwmark = usvc_compat->fwmark;
2048 /* Deep copy of sched_name is not needed here */
2049 usvc->sched_name = usvc_compat->sched_name;
2051 usvc->flags = usvc_compat->flags;
2052 usvc->timeout = usvc_compat->timeout;
2053 usvc->netmask = usvc_compat->netmask;
2056 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2057 struct ip_vs_dest_user *udest_compat)
2059 udest->addr.ip = udest_compat->addr;
2060 udest->port = udest_compat->port;
2061 udest->conn_flags = udest_compat->conn_flags;
2062 udest->weight = udest_compat->weight;
2063 udest->u_threshold = udest_compat->u_threshold;
2064 udest->l_threshold = udest_compat->l_threshold;
2068 do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2071 unsigned char arg[MAX_ARG_LEN];
2072 struct ip_vs_service_user *usvc_compat;
2073 struct ip_vs_service_user_kern usvc;
2074 struct ip_vs_service *svc;
2075 struct ip_vs_dest_user *udest_compat;
2076 struct ip_vs_dest_user_kern udest;
2078 if (!capable(CAP_NET_ADMIN))
2081 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2083 if (len < 0 || len > MAX_ARG_LEN)
2085 if (len != set_arglen[SET_CMDID(cmd)]) {
2086 pr_err("set_ctl: len %u != %u\n",
2087 len, set_arglen[SET_CMDID(cmd)]);
2091 if (copy_from_user(arg, user, len) != 0)
2094 /* increase the module use count */
2095 ip_vs_use_count_inc();
2097 if (mutex_lock_interruptible(&__ip_vs_mutex)) {
2102 if (cmd == IP_VS_SO_SET_FLUSH) {
2103 /* Flush the virtual service */
2104 ret = ip_vs_flush();
2106 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2107 /* Set timeout values for (tcp tcpfin udp) */
2108 ret = ip_vs_set_timeout((struct ip_vs_timeout_user *)arg);
2110 } else if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2111 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2112 ret = start_sync_thread(dm->state, dm->mcast_ifn, dm->syncid);
2114 } else if (cmd == IP_VS_SO_SET_STOPDAEMON) {
2115 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2116 ret = stop_sync_thread(dm->state);
2120 usvc_compat = (struct ip_vs_service_user *)arg;
2121 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2123 /* We only use the new structs internally, so copy userspace compat
2124 * structs to extended internal versions */
2125 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2126 ip_vs_copy_udest_compat(&udest, udest_compat);
2128 if (cmd == IP_VS_SO_SET_ZERO) {
2129 /* if no service address is set, zero counters in all */
2130 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2131 ret = ip_vs_zero_all();
2136 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2137 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2138 usvc.protocol != IPPROTO_SCTP) {
2139 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2140 usvc.protocol, &usvc.addr.ip,
2141 ntohs(usvc.port), usvc.sched_name);
2146 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2147 if (usvc.fwmark == 0)
2148 svc = __ip_vs_service_get(usvc.af, usvc.protocol,
2149 &usvc.addr, usvc.port);
2151 svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
2153 if (cmd != IP_VS_SO_SET_ADD
2154 && (svc == NULL || svc->protocol != usvc.protocol)) {
2160 case IP_VS_SO_SET_ADD:
2164 ret = ip_vs_add_service(&usvc, &svc);
2166 case IP_VS_SO_SET_EDIT:
2167 ret = ip_vs_edit_service(svc, &usvc);
2169 case IP_VS_SO_SET_DEL:
2170 ret = ip_vs_del_service(svc);
2174 case IP_VS_SO_SET_ZERO:
2175 ret = ip_vs_zero_service(svc);
2177 case IP_VS_SO_SET_ADDDEST:
2178 ret = ip_vs_add_dest(svc, &udest);
2180 case IP_VS_SO_SET_EDITDEST:
2181 ret = ip_vs_edit_dest(svc, &udest);
2183 case IP_VS_SO_SET_DELDEST:
2184 ret = ip_vs_del_dest(svc, &udest);
2191 ip_vs_service_put(svc);
2194 mutex_unlock(&__ip_vs_mutex);
2196 /* decrease the module use count */
2197 ip_vs_use_count_dec();
2204 ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
2206 spin_lock_bh(&src->lock);
2207 memcpy(dst, &src->ustats, sizeof(*dst));
2208 spin_unlock_bh(&src->lock);
2212 ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2214 dst->protocol = src->protocol;
2215 dst->addr = src->addr.ip;
2216 dst->port = src->port;
2217 dst->fwmark = src->fwmark;
2218 strlcpy(dst->sched_name, src->scheduler->name, sizeof(dst->sched_name));
2219 dst->flags = src->flags;
2220 dst->timeout = src->timeout / HZ;
2221 dst->netmask = src->netmask;
2222 dst->num_dests = src->num_dests;
2223 ip_vs_copy_stats(&dst->stats, &src->stats);
2227 __ip_vs_get_service_entries(const struct ip_vs_get_services *get,
2228 struct ip_vs_get_services __user *uptr)
2231 struct ip_vs_service *svc;
2232 struct ip_vs_service_entry entry;
2235 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2236 list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2237 /* Only expose IPv4 entries to old interface */
2238 if (svc->af != AF_INET)
2241 if (count >= get->num_services)
2243 memset(&entry, 0, sizeof(entry));
2244 ip_vs_copy_service(&entry, svc);
2245 if (copy_to_user(&uptr->entrytable[count],
2246 &entry, sizeof(entry))) {
2254 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2255 list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2256 /* Only expose IPv4 entries to old interface */
2257 if (svc->af != AF_INET)
2260 if (count >= get->num_services)
2262 memset(&entry, 0, sizeof(entry));
2263 ip_vs_copy_service(&entry, svc);
2264 if (copy_to_user(&uptr->entrytable[count],
2265 &entry, sizeof(entry))) {
2277 __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get,
2278 struct ip_vs_get_dests __user *uptr)
2280 struct ip_vs_service *svc;
2281 union nf_inet_addr addr = { .ip = get->addr };
2285 svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark);
2287 svc = __ip_vs_service_get(AF_INET, get->protocol, &addr,
2292 struct ip_vs_dest *dest;
2293 struct ip_vs_dest_entry entry;
2295 list_for_each_entry(dest, &svc->destinations, n_list) {
2296 if (count >= get->num_dests)
2299 entry.addr = dest->addr.ip;
2300 entry.port = dest->port;
2301 entry.conn_flags = atomic_read(&dest->conn_flags);
2302 entry.weight = atomic_read(&dest->weight);
2303 entry.u_threshold = dest->u_threshold;
2304 entry.l_threshold = dest->l_threshold;
2305 entry.activeconns = atomic_read(&dest->activeconns);
2306 entry.inactconns = atomic_read(&dest->inactconns);
2307 entry.persistconns = atomic_read(&dest->persistconns);
2308 ip_vs_copy_stats(&entry.stats, &dest->stats);
2309 if (copy_to_user(&uptr->entrytable[count],
2310 &entry, sizeof(entry))) {
2316 ip_vs_service_put(svc);
2323 __ip_vs_get_timeouts(struct ip_vs_timeout_user *u)
2325 #ifdef CONFIG_IP_VS_PROTO_TCP
2327 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2328 u->tcp_fin_timeout =
2329 ip_vs_protocol_tcp.timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2331 #ifdef CONFIG_IP_VS_PROTO_UDP
2333 ip_vs_protocol_udp.timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2338 #define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2339 #define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
2340 #define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
2341 #define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
2342 #define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
2343 #define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2344 #define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
2346 static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
2347 [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
2348 [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
2349 [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
2350 [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
2351 [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
2352 [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
2353 [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
2357 do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2359 unsigned char arg[128];
2361 unsigned int copylen;
2363 if (!capable(CAP_NET_ADMIN))
2366 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2369 if (*len < get_arglen[GET_CMDID(cmd)]) {
2370 pr_err("get_ctl: len %u < %u\n",
2371 *len, get_arglen[GET_CMDID(cmd)]);
2375 copylen = get_arglen[GET_CMDID(cmd)];
2379 if (copy_from_user(arg, user, copylen) != 0)
2382 if (mutex_lock_interruptible(&__ip_vs_mutex))
2383 return -ERESTARTSYS;
2386 case IP_VS_SO_GET_VERSION:
2390 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2391 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2392 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2396 *len = strlen(buf)+1;
2400 case IP_VS_SO_GET_INFO:
2402 struct ip_vs_getinfo info;
2403 info.version = IP_VS_VERSION_CODE;
2404 info.size = ip_vs_conn_tab_size;
2405 info.num_services = ip_vs_num_services;
2406 if (copy_to_user(user, &info, sizeof(info)) != 0)
2411 case IP_VS_SO_GET_SERVICES:
2413 struct ip_vs_get_services *get;
2416 get = (struct ip_vs_get_services *)arg;
2417 size = sizeof(*get) +
2418 sizeof(struct ip_vs_service_entry) * get->num_services;
2420 pr_err("length: %u != %u\n", *len, size);
2424 ret = __ip_vs_get_service_entries(get, user);
2428 case IP_VS_SO_GET_SERVICE:
2430 struct ip_vs_service_entry *entry;
2431 struct ip_vs_service *svc;
2432 union nf_inet_addr addr;
2434 entry = (struct ip_vs_service_entry *)arg;
2435 addr.ip = entry->addr;
2437 svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark);
2439 svc = __ip_vs_service_get(AF_INET, entry->protocol,
2440 &addr, entry->port);
2442 ip_vs_copy_service(entry, svc);
2443 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2445 ip_vs_service_put(svc);
2451 case IP_VS_SO_GET_DESTS:
2453 struct ip_vs_get_dests *get;
2456 get = (struct ip_vs_get_dests *)arg;
2457 size = sizeof(*get) +
2458 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2460 pr_err("length: %u != %u\n", *len, size);
2464 ret = __ip_vs_get_dest_entries(get, user);
2468 case IP_VS_SO_GET_TIMEOUT:
2470 struct ip_vs_timeout_user t;
2472 __ip_vs_get_timeouts(&t);
2473 if (copy_to_user(user, &t, sizeof(t)) != 0)
2478 case IP_VS_SO_GET_DAEMON:
2480 struct ip_vs_daemon_user d[2];
2482 memset(&d, 0, sizeof(d));
2483 if (ip_vs_sync_state & IP_VS_STATE_MASTER) {
2484 d[0].state = IP_VS_STATE_MASTER;
2485 strlcpy(d[0].mcast_ifn, ip_vs_master_mcast_ifn, sizeof(d[0].mcast_ifn));
2486 d[0].syncid = ip_vs_master_syncid;
2488 if (ip_vs_sync_state & IP_VS_STATE_BACKUP) {
2489 d[1].state = IP_VS_STATE_BACKUP;
2490 strlcpy(d[1].mcast_ifn, ip_vs_backup_mcast_ifn, sizeof(d[1].mcast_ifn));
2491 d[1].syncid = ip_vs_backup_syncid;
2493 if (copy_to_user(user, &d, sizeof(d)) != 0)
2503 mutex_unlock(&__ip_vs_mutex);
2508 static struct nf_sockopt_ops ip_vs_sockopts = {
2510 .set_optmin = IP_VS_BASE_CTL,
2511 .set_optmax = IP_VS_SO_SET_MAX+1,
2512 .set = do_ip_vs_set_ctl,
2513 .get_optmin = IP_VS_BASE_CTL,
2514 .get_optmax = IP_VS_SO_GET_MAX+1,
2515 .get = do_ip_vs_get_ctl,
2516 .owner = THIS_MODULE,
2520 * Generic Netlink interface
2523 /* IPVS genetlink family */
2524 static struct genl_family ip_vs_genl_family = {
2525 .id = GENL_ID_GENERATE,
2527 .name = IPVS_GENL_NAME,
2528 .version = IPVS_GENL_VERSION,
2529 .maxattr = IPVS_CMD_MAX,
2532 /* Policy used for first-level command attributes */
2533 static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2534 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2535 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2536 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2537 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2538 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2539 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2542 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2543 static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2544 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2545 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2546 .len = IP_VS_IFNAME_MAXLEN },
2547 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2550 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2551 static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2552 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2553 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2554 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2555 .len = sizeof(union nf_inet_addr) },
2556 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2557 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2558 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2559 .len = IP_VS_SCHEDNAME_MAXLEN },
2560 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2561 .len = sizeof(struct ip_vs_flags) },
2562 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2563 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2564 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2567 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2568 static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2569 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2570 .len = sizeof(union nf_inet_addr) },
2571 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2572 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2573 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2574 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2575 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2576 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2577 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2578 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2579 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2582 static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2583 struct ip_vs_stats *stats)
2585 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2589 spin_lock_bh(&stats->lock);
2591 NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->ustats.conns);
2592 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->ustats.inpkts);
2593 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->ustats.outpkts);
2594 NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->ustats.inbytes);
2595 NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->ustats.outbytes);
2596 NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->ustats.cps);
2597 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->ustats.inpps);
2598 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->ustats.outpps);
2599 NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->ustats.inbps);
2600 NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->ustats.outbps);
2602 spin_unlock_bh(&stats->lock);
2604 nla_nest_end(skb, nl_stats);
2609 spin_unlock_bh(&stats->lock);
2610 nla_nest_cancel(skb, nl_stats);
2614 static int ip_vs_genl_fill_service(struct sk_buff *skb,
2615 struct ip_vs_service *svc)
2617 struct nlattr *nl_service;
2618 struct ip_vs_flags flags = { .flags = svc->flags,
2621 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2625 NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, svc->af);
2628 NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark);
2630 NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol);
2631 NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr);
2632 NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port);
2635 NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name);
2636 NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags);
2637 NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ);
2638 NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask);
2640 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
2641 goto nla_put_failure;
2643 nla_nest_end(skb, nl_service);
2648 nla_nest_cancel(skb, nl_service);
2652 static int ip_vs_genl_dump_service(struct sk_buff *skb,
2653 struct ip_vs_service *svc,
2654 struct netlink_callback *cb)
2658 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2659 &ip_vs_genl_family, NLM_F_MULTI,
2660 IPVS_CMD_NEW_SERVICE);
2664 if (ip_vs_genl_fill_service(skb, svc) < 0)
2665 goto nla_put_failure;
2667 return genlmsg_end(skb, hdr);
2670 genlmsg_cancel(skb, hdr);
2674 static int ip_vs_genl_dump_services(struct sk_buff *skb,
2675 struct netlink_callback *cb)
2678 int start = cb->args[0];
2679 struct ip_vs_service *svc;
2681 mutex_lock(&__ip_vs_mutex);
2682 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2683 list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
2686 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2688 goto nla_put_failure;
2693 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
2694 list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
2697 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2699 goto nla_put_failure;
2705 mutex_unlock(&__ip_vs_mutex);
2711 static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc,
2712 struct nlattr *nla, int full_entry)
2714 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
2715 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
2717 /* Parse mandatory identifying service fields first */
2719 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
2722 nla_af = attrs[IPVS_SVC_ATTR_AF];
2723 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
2724 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
2725 nla_port = attrs[IPVS_SVC_ATTR_PORT];
2726 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
2728 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
2731 memset(usvc, 0, sizeof(*usvc));
2733 usvc->af = nla_get_u16(nla_af);
2734 #ifdef CONFIG_IP_VS_IPV6
2735 if (usvc->af != AF_INET && usvc->af != AF_INET6)
2737 if (usvc->af != AF_INET)
2739 return -EAFNOSUPPORT;
2742 usvc->protocol = IPPROTO_TCP;
2743 usvc->fwmark = nla_get_u32(nla_fwmark);
2745 usvc->protocol = nla_get_u16(nla_protocol);
2746 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
2747 usvc->port = nla_get_u16(nla_port);
2751 /* If a full entry was requested, check for the additional fields */
2753 struct nlattr *nla_sched, *nla_flags, *nla_timeout,
2755 struct ip_vs_flags flags;
2756 struct ip_vs_service *svc;
2758 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
2759 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
2760 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
2761 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
2763 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
2766 nla_memcpy(&flags, nla_flags, sizeof(flags));
2768 /* prefill flags from service if it already exists */
2770 svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark);
2772 svc = __ip_vs_service_get(usvc->af, usvc->protocol,
2773 &usvc->addr, usvc->port);
2775 usvc->flags = svc->flags;
2776 ip_vs_service_put(svc);
2780 /* set new flags from userland */
2781 usvc->flags = (usvc->flags & ~flags.mask) |
2782 (flags.flags & flags.mask);
2783 usvc->sched_name = nla_data(nla_sched);
2784 usvc->timeout = nla_get_u32(nla_timeout);
2785 usvc->netmask = nla_get_u32(nla_netmask);
2791 static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla)
2793 struct ip_vs_service_user_kern usvc;
2796 ret = ip_vs_genl_parse_service(&usvc, nla, 0);
2798 return ERR_PTR(ret);
2801 return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
2803 return __ip_vs_service_get(usvc.af, usvc.protocol,
2804 &usvc.addr, usvc.port);
2807 static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
2809 struct nlattr *nl_dest;
2811 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
2815 NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr);
2816 NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port);
2818 NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD,
2819 atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK);
2820 NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight));
2821 NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold);
2822 NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold);
2823 NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
2824 atomic_read(&dest->activeconns));
2825 NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS,
2826 atomic_read(&dest->inactconns));
2827 NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
2828 atomic_read(&dest->persistconns));
2830 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
2831 goto nla_put_failure;
2833 nla_nest_end(skb, nl_dest);
2838 nla_nest_cancel(skb, nl_dest);
2842 static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
2843 struct netlink_callback *cb)
2847 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2848 &ip_vs_genl_family, NLM_F_MULTI,
2853 if (ip_vs_genl_fill_dest(skb, dest) < 0)
2854 goto nla_put_failure;
2856 return genlmsg_end(skb, hdr);
2859 genlmsg_cancel(skb, hdr);
2863 static int ip_vs_genl_dump_dests(struct sk_buff *skb,
2864 struct netlink_callback *cb)
2867 int start = cb->args[0];
2868 struct ip_vs_service *svc;
2869 struct ip_vs_dest *dest;
2870 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
2872 mutex_lock(&__ip_vs_mutex);
2874 /* Try to find the service for which to dump destinations */
2875 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
2876 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
2879 svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]);
2880 if (IS_ERR(svc) || svc == NULL)
2883 /* Dump the destinations */
2884 list_for_each_entry(dest, &svc->destinations, n_list) {
2887 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
2889 goto nla_put_failure;
2895 ip_vs_service_put(svc);
2898 mutex_unlock(&__ip_vs_mutex);
2903 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
2904 struct nlattr *nla, int full_entry)
2906 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
2907 struct nlattr *nla_addr, *nla_port;
2909 /* Parse mandatory identifying destination fields first */
2911 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
2914 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
2915 nla_port = attrs[IPVS_DEST_ATTR_PORT];
2917 if (!(nla_addr && nla_port))
2920 memset(udest, 0, sizeof(*udest));
2922 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
2923 udest->port = nla_get_u16(nla_port);
2925 /* If a full entry was requested, check for the additional fields */
2927 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
2930 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
2931 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
2932 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
2933 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
2935 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
2938 udest->conn_flags = nla_get_u32(nla_fwd)
2939 & IP_VS_CONN_F_FWD_MASK;
2940 udest->weight = nla_get_u32(nla_weight);
2941 udest->u_threshold = nla_get_u32(nla_u_thresh);
2942 udest->l_threshold = nla_get_u32(nla_l_thresh);
2948 static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state,
2949 const char *mcast_ifn, __be32 syncid)
2951 struct nlattr *nl_daemon;
2953 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
2957 NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state);
2958 NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn);
2959 NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid);
2961 nla_nest_end(skb, nl_daemon);
2966 nla_nest_cancel(skb, nl_daemon);
2970 static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state,
2971 const char *mcast_ifn, __be32 syncid,
2972 struct netlink_callback *cb)
2975 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
2976 &ip_vs_genl_family, NLM_F_MULTI,
2977 IPVS_CMD_NEW_DAEMON);
2981 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
2982 goto nla_put_failure;
2984 return genlmsg_end(skb, hdr);
2987 genlmsg_cancel(skb, hdr);
2991 static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
2992 struct netlink_callback *cb)
2994 mutex_lock(&__ip_vs_mutex);
2995 if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
2996 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
2997 ip_vs_master_mcast_ifn,
2998 ip_vs_master_syncid, cb) < 0)
2999 goto nla_put_failure;
3004 if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3005 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3006 ip_vs_backup_mcast_ifn,
3007 ip_vs_backup_syncid, cb) < 0)
3008 goto nla_put_failure;
3014 mutex_unlock(&__ip_vs_mutex);
3019 static int ip_vs_genl_new_daemon(struct nlattr **attrs)
3021 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3022 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3023 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3026 return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
3027 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3028 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3031 static int ip_vs_genl_del_daemon(struct nlattr **attrs)
3033 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3036 return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3039 static int ip_vs_genl_set_config(struct nlattr **attrs)
3041 struct ip_vs_timeout_user t;
3043 __ip_vs_get_timeouts(&t);
3045 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3046 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3048 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3050 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3052 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3053 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3055 return ip_vs_set_timeout(&t);
3058 static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3060 struct ip_vs_service *svc = NULL;
3061 struct ip_vs_service_user_kern usvc;
3062 struct ip_vs_dest_user_kern udest;
3064 int need_full_svc = 0, need_full_dest = 0;
3066 cmd = info->genlhdr->cmd;
3068 mutex_lock(&__ip_vs_mutex);
3070 if (cmd == IPVS_CMD_FLUSH) {
3071 ret = ip_vs_flush();
3073 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3074 ret = ip_vs_genl_set_config(info->attrs);
3076 } else if (cmd == IPVS_CMD_NEW_DAEMON ||
3077 cmd == IPVS_CMD_DEL_DAEMON) {
3079 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3081 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3082 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3083 info->attrs[IPVS_CMD_ATTR_DAEMON],
3084 ip_vs_daemon_policy)) {
3089 if (cmd == IPVS_CMD_NEW_DAEMON)
3090 ret = ip_vs_genl_new_daemon(daemon_attrs);
3092 ret = ip_vs_genl_del_daemon(daemon_attrs);
3094 } else if (cmd == IPVS_CMD_ZERO &&
3095 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3096 ret = ip_vs_zero_all();
3100 /* All following commands require a service argument, so check if we
3101 * received a valid one. We need a full service specification when
3102 * adding / editing a service. Only identifying members otherwise. */
3103 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3106 ret = ip_vs_genl_parse_service(&usvc,
3107 info->attrs[IPVS_CMD_ATTR_SERVICE],
3112 /* Lookup the exact service by <protocol, addr, port> or fwmark */
3113 if (usvc.fwmark == 0)
3114 svc = __ip_vs_service_get(usvc.af, usvc.protocol,
3115 &usvc.addr, usvc.port);
3117 svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
3119 /* Unless we're adding a new service, the service must already exist */
3120 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3125 /* Destination commands require a valid destination argument. For
3126 * adding / editing a destination, we need a full destination
3128 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3129 cmd == IPVS_CMD_DEL_DEST) {
3130 if (cmd != IPVS_CMD_DEL_DEST)
3133 ret = ip_vs_genl_parse_dest(&udest,
3134 info->attrs[IPVS_CMD_ATTR_DEST],
3141 case IPVS_CMD_NEW_SERVICE:
3143 ret = ip_vs_add_service(&usvc, &svc);
3147 case IPVS_CMD_SET_SERVICE:
3148 ret = ip_vs_edit_service(svc, &usvc);
3150 case IPVS_CMD_DEL_SERVICE:
3151 ret = ip_vs_del_service(svc);
3153 case IPVS_CMD_NEW_DEST:
3154 ret = ip_vs_add_dest(svc, &udest);
3156 case IPVS_CMD_SET_DEST:
3157 ret = ip_vs_edit_dest(svc, &udest);
3159 case IPVS_CMD_DEL_DEST:
3160 ret = ip_vs_del_dest(svc, &udest);
3163 ret = ip_vs_zero_service(svc);
3171 ip_vs_service_put(svc);
3172 mutex_unlock(&__ip_vs_mutex);
3177 static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3179 struct sk_buff *msg;
3181 int ret, cmd, reply_cmd;
3183 cmd = info->genlhdr->cmd;
3185 if (cmd == IPVS_CMD_GET_SERVICE)
3186 reply_cmd = IPVS_CMD_NEW_SERVICE;
3187 else if (cmd == IPVS_CMD_GET_INFO)
3188 reply_cmd = IPVS_CMD_SET_INFO;
3189 else if (cmd == IPVS_CMD_GET_CONFIG)
3190 reply_cmd = IPVS_CMD_SET_CONFIG;
3192 pr_err("unknown Generic Netlink command\n");
3196 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3200 mutex_lock(&__ip_vs_mutex);
3202 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3204 goto nla_put_failure;
3207 case IPVS_CMD_GET_SERVICE:
3209 struct ip_vs_service *svc;
3211 svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]);
3216 ret = ip_vs_genl_fill_service(msg, svc);
3217 ip_vs_service_put(svc);
3219 goto nla_put_failure;
3228 case IPVS_CMD_GET_CONFIG:
3230 struct ip_vs_timeout_user t;
3232 __ip_vs_get_timeouts(&t);
3233 #ifdef CONFIG_IP_VS_PROTO_TCP
3234 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout);
3235 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3238 #ifdef CONFIG_IP_VS_PROTO_UDP
3239 NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout);
3245 case IPVS_CMD_GET_INFO:
3246 NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE);
3247 NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3248 ip_vs_conn_tab_size);
3252 genlmsg_end(msg, reply);
3253 ret = genlmsg_reply(msg, info);
3257 pr_err("not enough space in Netlink message\n");
3263 mutex_unlock(&__ip_vs_mutex);
3269 static struct genl_ops ip_vs_genl_ops[] __read_mostly = {
3271 .cmd = IPVS_CMD_NEW_SERVICE,
3272 .flags = GENL_ADMIN_PERM,
3273 .policy = ip_vs_cmd_policy,
3274 .doit = ip_vs_genl_set_cmd,
3277 .cmd = IPVS_CMD_SET_SERVICE,
3278 .flags = GENL_ADMIN_PERM,
3279 .policy = ip_vs_cmd_policy,
3280 .doit = ip_vs_genl_set_cmd,
3283 .cmd = IPVS_CMD_DEL_SERVICE,
3284 .flags = GENL_ADMIN_PERM,
3285 .policy = ip_vs_cmd_policy,
3286 .doit = ip_vs_genl_set_cmd,
3289 .cmd = IPVS_CMD_GET_SERVICE,
3290 .flags = GENL_ADMIN_PERM,
3291 .doit = ip_vs_genl_get_cmd,
3292 .dumpit = ip_vs_genl_dump_services,
3293 .policy = ip_vs_cmd_policy,
3296 .cmd = IPVS_CMD_NEW_DEST,
3297 .flags = GENL_ADMIN_PERM,
3298 .policy = ip_vs_cmd_policy,
3299 .doit = ip_vs_genl_set_cmd,
3302 .cmd = IPVS_CMD_SET_DEST,
3303 .flags = GENL_ADMIN_PERM,
3304 .policy = ip_vs_cmd_policy,
3305 .doit = ip_vs_genl_set_cmd,
3308 .cmd = IPVS_CMD_DEL_DEST,
3309 .flags = GENL_ADMIN_PERM,
3310 .policy = ip_vs_cmd_policy,
3311 .doit = ip_vs_genl_set_cmd,
3314 .cmd = IPVS_CMD_GET_DEST,
3315 .flags = GENL_ADMIN_PERM,
3316 .policy = ip_vs_cmd_policy,
3317 .dumpit = ip_vs_genl_dump_dests,
3320 .cmd = IPVS_CMD_NEW_DAEMON,
3321 .flags = GENL_ADMIN_PERM,
3322 .policy = ip_vs_cmd_policy,
3323 .doit = ip_vs_genl_set_cmd,
3326 .cmd = IPVS_CMD_DEL_DAEMON,
3327 .flags = GENL_ADMIN_PERM,
3328 .policy = ip_vs_cmd_policy,
3329 .doit = ip_vs_genl_set_cmd,
3332 .cmd = IPVS_CMD_GET_DAEMON,
3333 .flags = GENL_ADMIN_PERM,
3334 .dumpit = ip_vs_genl_dump_daemons,
3337 .cmd = IPVS_CMD_SET_CONFIG,
3338 .flags = GENL_ADMIN_PERM,
3339 .policy = ip_vs_cmd_policy,
3340 .doit = ip_vs_genl_set_cmd,
3343 .cmd = IPVS_CMD_GET_CONFIG,
3344 .flags = GENL_ADMIN_PERM,
3345 .doit = ip_vs_genl_get_cmd,
3348 .cmd = IPVS_CMD_GET_INFO,
3349 .flags = GENL_ADMIN_PERM,
3350 .doit = ip_vs_genl_get_cmd,
3353 .cmd = IPVS_CMD_ZERO,
3354 .flags = GENL_ADMIN_PERM,
3355 .policy = ip_vs_cmd_policy,
3356 .doit = ip_vs_genl_set_cmd,
3359 .cmd = IPVS_CMD_FLUSH,
3360 .flags = GENL_ADMIN_PERM,
3361 .doit = ip_vs_genl_set_cmd,
3365 static int __init ip_vs_genl_register(void)
3367 return genl_register_family_with_ops(&ip_vs_genl_family,
3368 ip_vs_genl_ops, ARRAY_SIZE(ip_vs_genl_ops));
3371 static void ip_vs_genl_unregister(void)
3373 genl_unregister_family(&ip_vs_genl_family);
3376 /* End of Generic Netlink interface definitions */
3379 int __init ip_vs_control_init(void)
3386 ret = nf_register_sockopt(&ip_vs_sockopts);
3388 pr_err("cannot register sockopt.\n");
3392 ret = ip_vs_genl_register();
3394 pr_err("cannot register Generic Netlink interface.\n");
3395 nf_unregister_sockopt(&ip_vs_sockopts);
3399 proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops);
3400 proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops);
3402 sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars);
3404 /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */
3405 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
3406 INIT_LIST_HEAD(&ip_vs_svc_table[idx]);
3407 INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]);
3409 for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) {
3410 INIT_LIST_HEAD(&ip_vs_rtable[idx]);
3413 ip_vs_new_estimator(&ip_vs_stats);
3415 /* Hook the defense timer */
3416 schedule_delayed_work(&defense_work, DEFENSE_TIMER_PERIOD);
3423 void ip_vs_control_cleanup(void)
3426 ip_vs_trash_cleanup();
3427 cancel_rearming_delayed_work(&defense_work);
3428 cancel_work_sync(&defense_work.work);
3429 ip_vs_kill_estimator(&ip_vs_stats);
3430 unregister_sysctl_table(sysctl_header);
3431 proc_net_remove(&init_net, "ip_vs_stats");
3432 proc_net_remove(&init_net, "ip_vs");
3433 ip_vs_genl_unregister();
3434 nf_unregister_sockopt(&ip_vs_sockopts);