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>
41 #include <linux/nsproxy.h>
43 #ifdef CONFIG_IP_VS_IPV6
45 #include <net/ip6_route.h>
47 #include <net/route.h>
49 #include <net/genetlink.h>
51 #include <linux/uaccess.h>
53 #include <net/ip_vs.h>
55 /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
56 static DEFINE_MUTEX(__ip_vs_mutex);
58 /* sysctl variables */
60 #ifdef CONFIG_IP_VS_DEBUG
61 static int sysctl_ip_vs_debug_level = 0;
63 int ip_vs_get_debug_level(void)
65 return sysctl_ip_vs_debug_level;
71 static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup);
74 #ifdef CONFIG_IP_VS_IPV6
75 /* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
76 static bool __ip_vs_addr_is_local_v6(struct net *net,
77 const struct in6_addr *addr)
82 struct dst_entry *dst = ip6_route_output(net, NULL, &fl6);
85 is_local = !dst->error && dst->dev && (dst->dev->flags & IFF_LOOPBACK);
94 * update_defense_level is called from keventd and from sysctl,
95 * so it needs to protect itself from softirqs
97 static void update_defense_level(struct netns_ipvs *ipvs)
100 static int old_secure_tcp = 0;
105 /* we only count free and buffered memory (in pages) */
107 availmem = i.freeram + i.bufferram;
108 /* however in linux 2.5 the i.bufferram is total page cache size,
110 /* si_swapinfo(&i); */
111 /* availmem = availmem - (i.totalswap - i.freeswap); */
113 nomem = (availmem < ipvs->sysctl_amemthresh);
118 spin_lock(&ipvs->dropentry_lock);
119 switch (ipvs->sysctl_drop_entry) {
121 atomic_set(&ipvs->dropentry, 0);
125 atomic_set(&ipvs->dropentry, 1);
126 ipvs->sysctl_drop_entry = 2;
128 atomic_set(&ipvs->dropentry, 0);
133 atomic_set(&ipvs->dropentry, 1);
135 atomic_set(&ipvs->dropentry, 0);
136 ipvs->sysctl_drop_entry = 1;
140 atomic_set(&ipvs->dropentry, 1);
143 spin_unlock(&ipvs->dropentry_lock);
146 spin_lock(&ipvs->droppacket_lock);
147 switch (ipvs->sysctl_drop_packet) {
153 ipvs->drop_rate = ipvs->drop_counter
154 = ipvs->sysctl_amemthresh /
155 (ipvs->sysctl_amemthresh-availmem);
156 ipvs->sysctl_drop_packet = 2;
163 ipvs->drop_rate = ipvs->drop_counter
164 = ipvs->sysctl_amemthresh /
165 (ipvs->sysctl_amemthresh-availmem);
168 ipvs->sysctl_drop_packet = 1;
172 ipvs->drop_rate = ipvs->sysctl_am_droprate;
175 spin_unlock(&ipvs->droppacket_lock);
178 spin_lock(&ipvs->securetcp_lock);
179 switch (ipvs->sysctl_secure_tcp) {
181 if (old_secure_tcp >= 2)
186 if (old_secure_tcp < 2)
188 ipvs->sysctl_secure_tcp = 2;
190 if (old_secure_tcp >= 2)
196 if (old_secure_tcp < 2)
199 if (old_secure_tcp >= 2)
201 ipvs->sysctl_secure_tcp = 1;
205 if (old_secure_tcp < 2)
209 old_secure_tcp = ipvs->sysctl_secure_tcp;
211 ip_vs_protocol_timeout_change(ipvs,
212 ipvs->sysctl_secure_tcp > 1);
213 spin_unlock(&ipvs->securetcp_lock);
220 * Timer for checking the defense
222 #define DEFENSE_TIMER_PERIOD 1*HZ
224 static void defense_work_handler(struct work_struct *work)
226 struct netns_ipvs *ipvs =
227 container_of(work, struct netns_ipvs, defense_work.work);
229 update_defense_level(ipvs);
230 if (atomic_read(&ipvs->dropentry))
231 ip_vs_random_dropentry(ipvs);
232 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
237 ip_vs_use_count_inc(void)
239 return try_module_get(THIS_MODULE);
243 ip_vs_use_count_dec(void)
245 module_put(THIS_MODULE);
250 * Hash table: for virtual service lookups
252 #define IP_VS_SVC_TAB_BITS 8
253 #define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
254 #define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
256 /* the service table hashed by <protocol, addr, port> */
257 static struct hlist_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
258 /* the service table hashed by fwmark */
259 static struct hlist_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
263 * Returns hash value for virtual service
265 static inline unsigned int
266 ip_vs_svc_hashkey(struct netns_ipvs *ipvs, int af, unsigned int proto,
267 const union nf_inet_addr *addr, __be16 port)
269 register unsigned int porth = ntohs(port);
270 __be32 addr_fold = addr->ip;
273 #ifdef CONFIG_IP_VS_IPV6
275 addr_fold = addr->ip6[0]^addr->ip6[1]^
276 addr->ip6[2]^addr->ip6[3];
278 ahash = ntohl(addr_fold);
279 ahash ^= ((size_t) ipvs >> 8);
281 return (proto ^ ahash ^ (porth >> IP_VS_SVC_TAB_BITS) ^ porth) &
286 * Returns hash value of fwmark for virtual service lookup
288 static inline unsigned int ip_vs_svc_fwm_hashkey(struct netns_ipvs *ipvs, __u32 fwmark)
290 return (((size_t)ipvs>>8) ^ fwmark) & IP_VS_SVC_TAB_MASK;
294 * Hashes a service in the ip_vs_svc_table by <netns,proto,addr,port>
295 * or in the ip_vs_svc_fwm_table by fwmark.
296 * Should be called with locked tables.
298 static int ip_vs_svc_hash(struct ip_vs_service *svc)
302 if (svc->flags & IP_VS_SVC_F_HASHED) {
303 pr_err("%s(): request for already hashed, called from %pS\n",
304 __func__, __builtin_return_address(0));
308 if (svc->fwmark == 0) {
310 * Hash it by <netns,protocol,addr,port> in ip_vs_svc_table
312 hash = ip_vs_svc_hashkey(svc->ipvs, svc->af, svc->protocol,
313 &svc->addr, svc->port);
314 hlist_add_head_rcu(&svc->s_list, &ip_vs_svc_table[hash]);
317 * Hash it by fwmark in svc_fwm_table
319 hash = ip_vs_svc_fwm_hashkey(svc->ipvs, svc->fwmark);
320 hlist_add_head_rcu(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
323 svc->flags |= IP_VS_SVC_F_HASHED;
324 /* increase its refcnt because it is referenced by the svc table */
325 atomic_inc(&svc->refcnt);
331 * Unhashes a service from svc_table / svc_fwm_table.
332 * Should be called with locked tables.
334 static int ip_vs_svc_unhash(struct ip_vs_service *svc)
336 if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
337 pr_err("%s(): request for unhash flagged, called from %pS\n",
338 __func__, __builtin_return_address(0));
342 if (svc->fwmark == 0) {
343 /* Remove it from the svc_table table */
344 hlist_del_rcu(&svc->s_list);
346 /* Remove it from the svc_fwm_table table */
347 hlist_del_rcu(&svc->f_list);
350 svc->flags &= ~IP_VS_SVC_F_HASHED;
351 atomic_dec(&svc->refcnt);
357 * Get service by {netns, proto,addr,port} in the service table.
359 static inline struct ip_vs_service *
360 __ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u16 protocol,
361 const union nf_inet_addr *vaddr, __be16 vport)
364 struct ip_vs_service *svc;
366 /* Check for "full" addressed entries */
367 hash = ip_vs_svc_hashkey(ipvs, af, protocol, vaddr, vport);
369 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[hash], s_list) {
371 && ip_vs_addr_equal(af, &svc->addr, vaddr)
372 && (svc->port == vport)
373 && (svc->protocol == protocol)
374 && (svc->ipvs == ipvs)) {
385 * Get service by {fwmark} in the service table.
387 static inline struct ip_vs_service *
388 __ip_vs_svc_fwm_find(struct netns_ipvs *ipvs, int af, __u32 fwmark)
391 struct ip_vs_service *svc;
393 /* Check for fwmark addressed entries */
394 hash = ip_vs_svc_fwm_hashkey(ipvs, fwmark);
396 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[hash], f_list) {
397 if (svc->fwmark == fwmark && svc->af == af
398 && (svc->ipvs == ipvs)) {
407 /* Find service, called under RCU lock */
408 struct ip_vs_service *
409 ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol,
410 const union nf_inet_addr *vaddr, __be16 vport)
412 struct ip_vs_service *svc;
415 * Check the table hashed by fwmark first
418 svc = __ip_vs_svc_fwm_find(ipvs, af, fwmark);
424 * Check the table hashed by <protocol,addr,port>
425 * for "full" addressed entries
427 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, vport);
429 if (!svc && protocol == IPPROTO_TCP &&
430 atomic_read(&ipvs->ftpsvc_counter) &&
431 (vport == FTPDATA || ntohs(vport) >= inet_prot_sock(ipvs->net))) {
433 * Check if ftp service entry exists, the packet
434 * might belong to FTP data connections.
436 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, FTPPORT);
440 && atomic_read(&ipvs->nullsvc_counter)) {
442 * Check if the catch-all port (port zero) exists
444 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, 0);
448 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
449 fwmark, ip_vs_proto_name(protocol),
450 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
451 svc ? "hit" : "not hit");
458 __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
460 atomic_inc(&svc->refcnt);
461 rcu_assign_pointer(dest->svc, svc);
464 static void ip_vs_service_free(struct ip_vs_service *svc)
466 free_percpu(svc->stats.cpustats);
470 static void ip_vs_service_rcu_free(struct rcu_head *head)
472 struct ip_vs_service *svc;
474 svc = container_of(head, struct ip_vs_service, rcu_head);
475 ip_vs_service_free(svc);
478 static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
480 if (atomic_dec_and_test(&svc->refcnt)) {
481 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
483 IP_VS_DBG_ADDR(svc->af, &svc->addr),
486 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
488 ip_vs_service_free(svc);
494 * Returns hash value for real service
496 static inline unsigned int ip_vs_rs_hashkey(int af,
497 const union nf_inet_addr *addr,
500 register unsigned int porth = ntohs(port);
501 __be32 addr_fold = addr->ip;
503 #ifdef CONFIG_IP_VS_IPV6
505 addr_fold = addr->ip6[0]^addr->ip6[1]^
506 addr->ip6[2]^addr->ip6[3];
509 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
513 /* Hash ip_vs_dest in rs_table by <proto,addr,port>. */
514 static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
518 if (dest->in_rs_table)
522 * Hash by proto,addr,port,
523 * which are the parameters of the real service.
525 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
527 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
528 dest->in_rs_table = 1;
531 /* Unhash ip_vs_dest from rs_table. */
532 static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
535 * Remove it from the rs_table table.
537 if (dest->in_rs_table) {
538 hlist_del_rcu(&dest->d_list);
539 dest->in_rs_table = 0;
543 /* Check if real service by <proto,addr,port> is present */
544 bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
545 const union nf_inet_addr *daddr, __be16 dport)
548 struct ip_vs_dest *dest;
550 /* Check for "full" addressed entries */
551 hash = ip_vs_rs_hashkey(af, daddr, dport);
553 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
554 if (dest->port == dport &&
556 ip_vs_addr_equal(af, &dest->addr, daddr) &&
557 (dest->protocol == protocol || dest->vfwmark)) {
566 /* Find real service record by <proto,addr,port>.
567 * In case of multiple records with the same <proto,addr,port>, only
568 * the first found record is returned.
570 * To be called under RCU lock.
572 struct ip_vs_dest *ip_vs_find_real_service(struct netns_ipvs *ipvs, int af,
574 const union nf_inet_addr *daddr,
578 struct ip_vs_dest *dest;
580 /* Check for "full" addressed entries */
581 hash = ip_vs_rs_hashkey(af, daddr, dport);
583 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
584 if (dest->port == dport &&
586 ip_vs_addr_equal(af, &dest->addr, daddr) &&
587 (dest->protocol == protocol || dest->vfwmark)) {
596 /* Lookup destination by {addr,port} in the given service
597 * Called under RCU lock.
599 static struct ip_vs_dest *
600 ip_vs_lookup_dest(struct ip_vs_service *svc, int dest_af,
601 const union nf_inet_addr *daddr, __be16 dport)
603 struct ip_vs_dest *dest;
606 * Find the destination for the given service
608 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
609 if ((dest->af == dest_af) &&
610 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
611 (dest->port == dport)) {
621 * Find destination by {daddr,dport,vaddr,protocol}
622 * Created to be used in ip_vs_process_message() in
623 * the backup synchronization daemon. It finds the
624 * destination to be bound to the received connection
626 * Called under RCU lock, no refcnt is returned.
628 struct ip_vs_dest *ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af,
629 const union nf_inet_addr *daddr,
631 const union nf_inet_addr *vaddr,
632 __be16 vport, __u16 protocol, __u32 fwmark,
635 struct ip_vs_dest *dest;
636 struct ip_vs_service *svc;
639 svc = ip_vs_service_find(ipvs, svc_af, fwmark, protocol, vaddr, vport);
642 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
644 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port);
646 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port ^ dport);
650 void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
652 struct ip_vs_dest_dst *dest_dst = container_of(head,
653 struct ip_vs_dest_dst,
656 dst_release(dest_dst->dst_cache);
660 /* Release dest_dst and dst_cache for dest in user context */
661 static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
663 struct ip_vs_dest_dst *old;
665 old = rcu_dereference_protected(dest->dest_dst, 1);
667 RCU_INIT_POINTER(dest->dest_dst, NULL);
668 call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
673 * Lookup dest by {svc,addr,port} in the destination trash.
674 * The destination trash is used to hold the destinations that are removed
675 * from the service table but are still referenced by some conn entries.
676 * The reason to add the destination trash is when the dest is temporary
677 * down (either by administrator or by monitor program), the dest can be
678 * picked back from the trash, the remaining connections to the dest can
679 * continue, and the counting information of the dest is also useful for
682 static struct ip_vs_dest *
683 ip_vs_trash_get_dest(struct ip_vs_service *svc, int dest_af,
684 const union nf_inet_addr *daddr, __be16 dport)
686 struct ip_vs_dest *dest;
687 struct netns_ipvs *ipvs = svc->ipvs;
690 * Find the destination in trash
692 spin_lock_bh(&ipvs->dest_trash_lock);
693 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
694 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
697 IP_VS_DBG_ADDR(dest->af, &dest->addr),
699 refcount_read(&dest->refcnt));
700 if (dest->af == dest_af &&
701 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
702 dest->port == dport &&
703 dest->vfwmark == svc->fwmark &&
704 dest->protocol == svc->protocol &&
706 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
707 dest->vport == svc->port))) {
709 list_del(&dest->t_list);
717 spin_unlock_bh(&ipvs->dest_trash_lock);
722 static void ip_vs_dest_free(struct ip_vs_dest *dest)
724 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
726 __ip_vs_dst_cache_reset(dest);
727 __ip_vs_svc_put(svc, false);
728 free_percpu(dest->stats.cpustats);
729 ip_vs_dest_put_and_free(dest);
733 * Clean up all the destinations in the trash
734 * Called by the ip_vs_control_cleanup()
736 * When the ip_vs_control_clearup is activated by ipvs module exit,
737 * the service tables must have been flushed and all the connections
738 * are expired, and the refcnt of each destination in the trash must
739 * be 1, so we simply release them here.
741 static void ip_vs_trash_cleanup(struct netns_ipvs *ipvs)
743 struct ip_vs_dest *dest, *nxt;
745 del_timer_sync(&ipvs->dest_trash_timer);
746 /* No need to use dest_trash_lock */
747 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, t_list) {
748 list_del(&dest->t_list);
749 ip_vs_dest_free(dest);
754 ip_vs_copy_stats(struct ip_vs_kstats *dst, struct ip_vs_stats *src)
756 #define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->kstats.c - src->kstats0.c
758 spin_lock_bh(&src->lock);
760 IP_VS_SHOW_STATS_COUNTER(conns);
761 IP_VS_SHOW_STATS_COUNTER(inpkts);
762 IP_VS_SHOW_STATS_COUNTER(outpkts);
763 IP_VS_SHOW_STATS_COUNTER(inbytes);
764 IP_VS_SHOW_STATS_COUNTER(outbytes);
766 ip_vs_read_estimator(dst, src);
768 spin_unlock_bh(&src->lock);
772 ip_vs_export_stats_user(struct ip_vs_stats_user *dst, struct ip_vs_kstats *src)
774 dst->conns = (u32)src->conns;
775 dst->inpkts = (u32)src->inpkts;
776 dst->outpkts = (u32)src->outpkts;
777 dst->inbytes = src->inbytes;
778 dst->outbytes = src->outbytes;
779 dst->cps = (u32)src->cps;
780 dst->inpps = (u32)src->inpps;
781 dst->outpps = (u32)src->outpps;
782 dst->inbps = (u32)src->inbps;
783 dst->outbps = (u32)src->outbps;
787 ip_vs_zero_stats(struct ip_vs_stats *stats)
789 spin_lock_bh(&stats->lock);
791 /* get current counters as zero point, rates are zeroed */
793 #define IP_VS_ZERO_STATS_COUNTER(c) stats->kstats0.c = stats->kstats.c
795 IP_VS_ZERO_STATS_COUNTER(conns);
796 IP_VS_ZERO_STATS_COUNTER(inpkts);
797 IP_VS_ZERO_STATS_COUNTER(outpkts);
798 IP_VS_ZERO_STATS_COUNTER(inbytes);
799 IP_VS_ZERO_STATS_COUNTER(outbytes);
801 ip_vs_zero_estimator(stats);
803 spin_unlock_bh(&stats->lock);
807 * Update a destination in the given service
810 __ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
811 struct ip_vs_dest_user_kern *udest, int add)
813 struct netns_ipvs *ipvs = svc->ipvs;
814 struct ip_vs_service *old_svc;
815 struct ip_vs_scheduler *sched;
818 /* We cannot modify an address and change the address family */
819 BUG_ON(!add && udest->af != dest->af);
821 if (add && udest->af != svc->af)
822 ipvs->mixed_address_family_dests++;
824 /* keep the last_weight with latest non-0 weight */
825 if (add || udest->weight != 0)
826 atomic_set(&dest->last_weight, udest->weight);
828 /* set the weight and the flags */
829 atomic_set(&dest->weight, udest->weight);
830 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
831 conn_flags |= IP_VS_CONN_F_INACTIVE;
833 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
834 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
835 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
838 * Put the real service in rs_table if not present.
839 * For now only for NAT!
841 ip_vs_rs_hash(ipvs, dest);
842 /* FTP-NAT requires conntrack for mangling */
843 if (svc->port == FTPPORT)
844 ip_vs_register_conntrack(svc);
846 atomic_set(&dest->conn_flags, conn_flags);
848 /* bind the service */
849 old_svc = rcu_dereference_protected(dest->svc, 1);
851 __ip_vs_bind_svc(dest, svc);
853 if (old_svc != svc) {
854 ip_vs_zero_stats(&dest->stats);
855 __ip_vs_bind_svc(dest, svc);
856 __ip_vs_svc_put(old_svc, true);
860 /* set the dest status flags */
861 dest->flags |= IP_VS_DEST_F_AVAILABLE;
863 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
864 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
865 dest->u_threshold = udest->u_threshold;
866 dest->l_threshold = udest->l_threshold;
868 dest->af = udest->af;
870 spin_lock_bh(&dest->dst_lock);
871 __ip_vs_dst_cache_reset(dest);
872 spin_unlock_bh(&dest->dst_lock);
875 ip_vs_start_estimator(svc->ipvs, &dest->stats);
876 list_add_rcu(&dest->n_list, &svc->destinations);
878 sched = rcu_dereference_protected(svc->scheduler, 1);
879 if (sched && sched->add_dest)
880 sched->add_dest(svc, dest);
882 sched = rcu_dereference_protected(svc->scheduler, 1);
883 if (sched && sched->upd_dest)
884 sched->upd_dest(svc, dest);
890 * Create a destination for the given service
893 ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
894 struct ip_vs_dest **dest_p)
896 struct ip_vs_dest *dest;
897 unsigned int atype, i;
901 #ifdef CONFIG_IP_VS_IPV6
902 if (udest->af == AF_INET6) {
903 atype = ipv6_addr_type(&udest->addr.in6);
904 if ((!(atype & IPV6_ADDR_UNICAST) ||
905 atype & IPV6_ADDR_LINKLOCAL) &&
906 !__ip_vs_addr_is_local_v6(svc->ipvs->net, &udest->addr.in6))
911 atype = inet_addr_type(svc->ipvs->net, udest->addr.ip);
912 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
916 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
920 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
921 if (!dest->stats.cpustats)
924 for_each_possible_cpu(i) {
925 struct ip_vs_cpu_stats *ip_vs_dest_stats;
926 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
927 u64_stats_init(&ip_vs_dest_stats->syncp);
930 dest->af = udest->af;
931 dest->protocol = svc->protocol;
932 dest->vaddr = svc->addr;
933 dest->vport = svc->port;
934 dest->vfwmark = svc->fwmark;
935 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
936 dest->port = udest->port;
938 atomic_set(&dest->activeconns, 0);
939 atomic_set(&dest->inactconns, 0);
940 atomic_set(&dest->persistconns, 0);
941 refcount_set(&dest->refcnt, 1);
943 INIT_HLIST_NODE(&dest->d_list);
944 spin_lock_init(&dest->dst_lock);
945 spin_lock_init(&dest->stats.lock);
946 __ip_vs_update_dest(svc, dest, udest, 1);
960 * Add a destination into an existing service
963 ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
965 struct ip_vs_dest *dest;
966 union nf_inet_addr daddr;
967 __be16 dport = udest->port;
972 if (udest->weight < 0) {
973 pr_err("%s(): server weight less than zero\n", __func__);
977 if (udest->l_threshold > udest->u_threshold) {
978 pr_err("%s(): lower threshold is higher than upper threshold\n",
983 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
985 /* We use function that requires RCU lock */
987 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
991 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
996 * Check if the dest already exists in the trash and
997 * is from the same service
999 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
1002 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
1003 "dest->refcnt=%d, service %u/%s:%u\n",
1004 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
1005 refcount_read(&dest->refcnt),
1007 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
1008 ntohs(dest->vport));
1010 __ip_vs_update_dest(svc, dest, udest, 1);
1014 * Allocate and initialize the dest structure
1016 ret = ip_vs_new_dest(svc, udest, &dest);
1025 * Edit a destination in the given service
1028 ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1030 struct ip_vs_dest *dest;
1031 union nf_inet_addr daddr;
1032 __be16 dport = udest->port;
1036 if (udest->weight < 0) {
1037 pr_err("%s(): server weight less than zero\n", __func__);
1041 if (udest->l_threshold > udest->u_threshold) {
1042 pr_err("%s(): lower threshold is higher than upper threshold\n",
1047 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
1049 /* We use function that requires RCU lock */
1051 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
1055 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1059 __ip_vs_update_dest(svc, dest, udest, 0);
1066 * Delete a destination (must be already unlinked from the service)
1068 static void __ip_vs_del_dest(struct netns_ipvs *ipvs, struct ip_vs_dest *dest,
1071 ip_vs_stop_estimator(ipvs, &dest->stats);
1074 * Remove it from the d-linked list with the real services.
1076 ip_vs_rs_unhash(dest);
1078 spin_lock_bh(&ipvs->dest_trash_lock);
1079 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1080 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1081 refcount_read(&dest->refcnt));
1082 if (list_empty(&ipvs->dest_trash) && !cleanup)
1083 mod_timer(&ipvs->dest_trash_timer,
1084 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1085 /* dest lives in trash with reference */
1086 list_add(&dest->t_list, &ipvs->dest_trash);
1087 dest->idle_start = 0;
1088 spin_unlock_bh(&ipvs->dest_trash_lock);
1093 * Unlink a destination from the given service
1095 static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1096 struct ip_vs_dest *dest,
1099 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1102 * Remove it from the d-linked destination list.
1104 list_del_rcu(&dest->n_list);
1107 if (dest->af != svc->af)
1108 svc->ipvs->mixed_address_family_dests--;
1111 struct ip_vs_scheduler *sched;
1113 sched = rcu_dereference_protected(svc->scheduler, 1);
1114 if (sched && sched->del_dest)
1115 sched->del_dest(svc, dest);
1121 * Delete a destination server in the given service
1124 ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1126 struct ip_vs_dest *dest;
1127 __be16 dport = udest->port;
1131 /* We use function that requires RCU lock */
1133 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
1137 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1142 * Unlink dest from the service
1144 __ip_vs_unlink_dest(svc, dest, 1);
1147 * Delete the destination
1149 __ip_vs_del_dest(svc->ipvs, dest, false);
1156 static void ip_vs_dest_trash_expire(struct timer_list *t)
1158 struct netns_ipvs *ipvs = from_timer(ipvs, t, dest_trash_timer);
1159 struct ip_vs_dest *dest, *next;
1160 unsigned long now = jiffies;
1162 spin_lock(&ipvs->dest_trash_lock);
1163 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
1164 if (refcount_read(&dest->refcnt) > 1)
1166 if (dest->idle_start) {
1167 if (time_before(now, dest->idle_start +
1168 IP_VS_DEST_TRASH_PERIOD))
1171 dest->idle_start = max(1UL, now);
1174 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1176 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1178 list_del(&dest->t_list);
1179 ip_vs_dest_free(dest);
1181 if (!list_empty(&ipvs->dest_trash))
1182 mod_timer(&ipvs->dest_trash_timer,
1183 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1184 spin_unlock(&ipvs->dest_trash_lock);
1188 * Add a service into the service hash table
1191 ip_vs_add_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *u,
1192 struct ip_vs_service **svc_p)
1195 struct ip_vs_scheduler *sched = NULL;
1196 struct ip_vs_pe *pe = NULL;
1197 struct ip_vs_service *svc = NULL;
1199 /* increase the module use count */
1200 ip_vs_use_count_inc();
1202 /* Lookup the scheduler by 'u->sched_name' */
1203 if (strcmp(u->sched_name, "none")) {
1204 sched = ip_vs_scheduler_get(u->sched_name);
1206 pr_info("Scheduler module ip_vs_%s not found\n",
1213 if (u->pe_name && *u->pe_name) {
1214 pe = ip_vs_pe_getbyname(u->pe_name);
1216 pr_info("persistence engine module ip_vs_pe_%s "
1217 "not found\n", u->pe_name);
1223 #ifdef CONFIG_IP_VS_IPV6
1224 if (u->af == AF_INET6) {
1225 __u32 plen = (__force __u32) u->netmask;
1227 if (plen < 1 || plen > 128) {
1234 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1236 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1240 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
1241 if (!svc->stats.cpustats) {
1246 for_each_possible_cpu(i) {
1247 struct ip_vs_cpu_stats *ip_vs_stats;
1248 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1249 u64_stats_init(&ip_vs_stats->syncp);
1253 /* I'm the first user of the service */
1254 atomic_set(&svc->refcnt, 0);
1257 svc->protocol = u->protocol;
1258 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1259 svc->port = u->port;
1260 svc->fwmark = u->fwmark;
1261 svc->flags = u->flags;
1262 svc->timeout = u->timeout * HZ;
1263 svc->netmask = u->netmask;
1266 INIT_LIST_HEAD(&svc->destinations);
1267 spin_lock_init(&svc->sched_lock);
1268 spin_lock_init(&svc->stats.lock);
1270 /* Bind the scheduler */
1272 ret = ip_vs_bind_scheduler(svc, sched);
1278 /* Bind the ct retriever */
1279 RCU_INIT_POINTER(svc->pe, pe);
1282 /* Update the virtual service counters */
1283 if (svc->port == FTPPORT)
1284 atomic_inc(&ipvs->ftpsvc_counter);
1285 else if (svc->port == 0)
1286 atomic_inc(&ipvs->nullsvc_counter);
1287 if (svc->pe && svc->pe->conn_out)
1288 atomic_inc(&ipvs->conn_out_counter);
1290 ip_vs_start_estimator(ipvs, &svc->stats);
1292 /* Count only IPv4 services for old get/setsockopt interface */
1293 if (svc->af == AF_INET)
1294 ipvs->num_services++;
1296 /* Hash the service into the service table */
1297 ip_vs_svc_hash(svc);
1300 /* Now there is a service - full throttle */
1307 ip_vs_unbind_scheduler(svc, sched);
1308 ip_vs_service_free(svc);
1310 ip_vs_scheduler_put(sched);
1313 /* decrease the module use count */
1314 ip_vs_use_count_dec();
1321 * Edit a service and bind it with a new scheduler
1324 ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1326 struct ip_vs_scheduler *sched = NULL, *old_sched;
1327 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1329 bool new_pe_conn_out, old_pe_conn_out;
1332 * Lookup the scheduler, by 'u->sched_name'
1334 if (strcmp(u->sched_name, "none")) {
1335 sched = ip_vs_scheduler_get(u->sched_name);
1337 pr_info("Scheduler module ip_vs_%s not found\n",
1344 if (u->pe_name && *u->pe_name) {
1345 pe = ip_vs_pe_getbyname(u->pe_name);
1347 pr_info("persistence engine module ip_vs_pe_%s "
1348 "not found\n", u->pe_name);
1355 #ifdef CONFIG_IP_VS_IPV6
1356 if (u->af == AF_INET6) {
1357 __u32 plen = (__force __u32) u->netmask;
1359 if (plen < 1 || plen > 128) {
1366 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1367 if (sched != old_sched) {
1369 ip_vs_unbind_scheduler(svc, old_sched);
1370 RCU_INIT_POINTER(svc->scheduler, NULL);
1371 /* Wait all svc->sched_data users */
1374 /* Bind the new scheduler */
1376 ret = ip_vs_bind_scheduler(svc, sched);
1378 ip_vs_scheduler_put(sched);
1385 * Set the flags and timeout value
1387 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1388 svc->timeout = u->timeout * HZ;
1389 svc->netmask = u->netmask;
1391 old_pe = rcu_dereference_protected(svc->pe, 1);
1393 rcu_assign_pointer(svc->pe, pe);
1394 /* check for optional methods in new pe */
1395 new_pe_conn_out = (pe && pe->conn_out) ? true : false;
1396 old_pe_conn_out = (old_pe && old_pe->conn_out) ? true : false;
1397 if (new_pe_conn_out && !old_pe_conn_out)
1398 atomic_inc(&svc->ipvs->conn_out_counter);
1399 if (old_pe_conn_out && !new_pe_conn_out)
1400 atomic_dec(&svc->ipvs->conn_out_counter);
1404 ip_vs_scheduler_put(old_sched);
1405 ip_vs_pe_put(old_pe);
1410 * Delete a service from the service list
1411 * - The service must be unlinked, unlocked and not referenced!
1412 * - We are called under _bh lock
1414 static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1416 struct ip_vs_dest *dest, *nxt;
1417 struct ip_vs_scheduler *old_sched;
1418 struct ip_vs_pe *old_pe;
1419 struct netns_ipvs *ipvs = svc->ipvs;
1421 /* Count only IPv4 services for old get/setsockopt interface */
1422 if (svc->af == AF_INET)
1423 ipvs->num_services--;
1425 ip_vs_stop_estimator(svc->ipvs, &svc->stats);
1427 /* Unbind scheduler */
1428 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1429 ip_vs_unbind_scheduler(svc, old_sched);
1430 ip_vs_scheduler_put(old_sched);
1432 /* Unbind persistence engine, keep svc->pe */
1433 old_pe = rcu_dereference_protected(svc->pe, 1);
1434 if (old_pe && old_pe->conn_out)
1435 atomic_dec(&ipvs->conn_out_counter);
1436 ip_vs_pe_put(old_pe);
1439 * Unlink the whole destination list
1441 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1442 __ip_vs_unlink_dest(svc, dest, 0);
1443 __ip_vs_del_dest(svc->ipvs, dest, cleanup);
1447 * Update the virtual service counters
1449 if (svc->port == FTPPORT)
1450 atomic_dec(&ipvs->ftpsvc_counter);
1451 else if (svc->port == 0)
1452 atomic_dec(&ipvs->nullsvc_counter);
1455 * Free the service if nobody refers to it
1457 __ip_vs_svc_put(svc, true);
1459 /* decrease the module use count */
1460 ip_vs_use_count_dec();
1464 * Unlink a service from list and try to delete it if its refcnt reached 0
1466 static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1468 ip_vs_unregister_conntrack(svc);
1469 /* Hold svc to avoid double release from dest_trash */
1470 atomic_inc(&svc->refcnt);
1472 * Unhash it from the service table
1474 ip_vs_svc_unhash(svc);
1476 __ip_vs_del_service(svc, cleanup);
1480 * Delete a service from the service list
1482 static int ip_vs_del_service(struct ip_vs_service *svc)
1486 ip_vs_unlink_service(svc, false);
1493 * Flush all the virtual services
1495 static int ip_vs_flush(struct netns_ipvs *ipvs, bool cleanup)
1498 struct ip_vs_service *svc;
1499 struct hlist_node *n;
1502 * Flush the service table hashed by <netns,protocol,addr,port>
1504 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1505 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1507 if (svc->ipvs == ipvs)
1508 ip_vs_unlink_service(svc, cleanup);
1513 * Flush the service table hashed by fwmark
1515 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1516 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1518 if (svc->ipvs == ipvs)
1519 ip_vs_unlink_service(svc, cleanup);
1527 * Delete service by {netns} in the service table.
1528 * Called by __ip_vs_cleanup()
1530 void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs)
1533 /* Check for "full" addressed entries */
1534 mutex_lock(&__ip_vs_mutex);
1535 ip_vs_flush(ipvs, true);
1536 mutex_unlock(&__ip_vs_mutex);
1540 /* Put all references for device (dst_cache) */
1542 ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
1544 struct ip_vs_dest_dst *dest_dst;
1546 spin_lock_bh(&dest->dst_lock);
1547 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1548 if (dest_dst && dest_dst->dst_cache->dev == dev) {
1549 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1551 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1553 refcount_read(&dest->refcnt));
1554 __ip_vs_dst_cache_reset(dest);
1556 spin_unlock_bh(&dest->dst_lock);
1559 /* Netdev event receiver
1560 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
1562 static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
1565 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1566 struct net *net = dev_net(dev);
1567 struct netns_ipvs *ipvs = net_ipvs(net);
1568 struct ip_vs_service *svc;
1569 struct ip_vs_dest *dest;
1572 if (event != NETDEV_DOWN || !ipvs)
1574 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1576 mutex_lock(&__ip_vs_mutex);
1577 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1578 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1579 if (svc->ipvs == ipvs) {
1580 list_for_each_entry(dest, &svc->destinations,
1582 ip_vs_forget_dev(dest, dev);
1587 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1588 if (svc->ipvs == ipvs) {
1589 list_for_each_entry(dest, &svc->destinations,
1591 ip_vs_forget_dev(dest, dev);
1598 spin_lock_bh(&ipvs->dest_trash_lock);
1599 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
1600 ip_vs_forget_dev(dest, dev);
1602 spin_unlock_bh(&ipvs->dest_trash_lock);
1603 mutex_unlock(&__ip_vs_mutex);
1609 * Zero counters in a service or all services
1611 static int ip_vs_zero_service(struct ip_vs_service *svc)
1613 struct ip_vs_dest *dest;
1615 list_for_each_entry(dest, &svc->destinations, n_list) {
1616 ip_vs_zero_stats(&dest->stats);
1618 ip_vs_zero_stats(&svc->stats);
1622 static int ip_vs_zero_all(struct netns_ipvs *ipvs)
1625 struct ip_vs_service *svc;
1627 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1628 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1629 if (svc->ipvs == ipvs)
1630 ip_vs_zero_service(svc);
1634 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1635 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1636 if (svc->ipvs == ipvs)
1637 ip_vs_zero_service(svc);
1641 ip_vs_zero_stats(&ipvs->tot_stats);
1645 #ifdef CONFIG_SYSCTL
1648 static int three = 3;
1651 proc_do_defense_mode(struct ctl_table *table, int write,
1652 void __user *buffer, size_t *lenp, loff_t *ppos)
1654 struct netns_ipvs *ipvs = table->extra2;
1655 int *valp = table->data;
1659 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1660 if (write && (*valp != val)) {
1661 if ((*valp < 0) || (*valp > 3)) {
1662 /* Restore the correct value */
1665 update_defense_level(ipvs);
1672 proc_do_sync_threshold(struct ctl_table *table, int write,
1673 void __user *buffer, size_t *lenp, loff_t *ppos)
1675 int *valp = table->data;
1679 /* backup the value first */
1680 memcpy(val, valp, sizeof(val));
1682 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1683 if (write && (valp[0] < 0 || valp[1] < 0 ||
1684 (valp[0] >= valp[1] && valp[1]))) {
1685 /* Restore the correct value */
1686 memcpy(valp, val, sizeof(val));
1692 proc_do_sync_mode(struct ctl_table *table, int write,
1693 void __user *buffer, size_t *lenp, loff_t *ppos)
1695 int *valp = table->data;
1699 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1700 if (write && (*valp != val)) {
1701 if ((*valp < 0) || (*valp > 1)) {
1702 /* Restore the correct value */
1710 proc_do_sync_ports(struct ctl_table *table, int write,
1711 void __user *buffer, size_t *lenp, loff_t *ppos)
1713 int *valp = table->data;
1717 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1718 if (write && (*valp != val)) {
1719 if (*valp < 1 || !is_power_of_2(*valp)) {
1720 /* Restore the correct value */
1728 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1729 * Do not change order or insert new entries without
1730 * align with netns init in ip_vs_control_net_init()
1733 static struct ctl_table vs_vars[] = {
1735 .procname = "amemthresh",
1736 .maxlen = sizeof(int),
1738 .proc_handler = proc_dointvec,
1741 .procname = "am_droprate",
1742 .maxlen = sizeof(int),
1744 .proc_handler = proc_dointvec,
1747 .procname = "drop_entry",
1748 .maxlen = sizeof(int),
1750 .proc_handler = proc_do_defense_mode,
1753 .procname = "drop_packet",
1754 .maxlen = sizeof(int),
1756 .proc_handler = proc_do_defense_mode,
1758 #ifdef CONFIG_IP_VS_NFCT
1760 .procname = "conntrack",
1761 .maxlen = sizeof(int),
1763 .proc_handler = &proc_dointvec,
1767 .procname = "secure_tcp",
1768 .maxlen = sizeof(int),
1770 .proc_handler = proc_do_defense_mode,
1773 .procname = "snat_reroute",
1774 .maxlen = sizeof(int),
1776 .proc_handler = &proc_dointvec,
1779 .procname = "sync_version",
1780 .maxlen = sizeof(int),
1782 .proc_handler = proc_do_sync_mode,
1785 .procname = "sync_ports",
1786 .maxlen = sizeof(int),
1788 .proc_handler = proc_do_sync_ports,
1791 .procname = "sync_persist_mode",
1792 .maxlen = sizeof(int),
1794 .proc_handler = proc_dointvec,
1797 .procname = "sync_qlen_max",
1798 .maxlen = sizeof(unsigned long),
1800 .proc_handler = proc_doulongvec_minmax,
1803 .procname = "sync_sock_size",
1804 .maxlen = sizeof(int),
1806 .proc_handler = proc_dointvec,
1809 .procname = "cache_bypass",
1810 .maxlen = sizeof(int),
1812 .proc_handler = proc_dointvec,
1815 .procname = "expire_nodest_conn",
1816 .maxlen = sizeof(int),
1818 .proc_handler = proc_dointvec,
1821 .procname = "sloppy_tcp",
1822 .maxlen = sizeof(int),
1824 .proc_handler = proc_dointvec,
1827 .procname = "sloppy_sctp",
1828 .maxlen = sizeof(int),
1830 .proc_handler = proc_dointvec,
1833 .procname = "expire_quiescent_template",
1834 .maxlen = sizeof(int),
1836 .proc_handler = proc_dointvec,
1839 .procname = "sync_threshold",
1841 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1843 .proc_handler = proc_do_sync_threshold,
1846 .procname = "sync_refresh_period",
1847 .maxlen = sizeof(int),
1849 .proc_handler = proc_dointvec_jiffies,
1852 .procname = "sync_retries",
1853 .maxlen = sizeof(int),
1855 .proc_handler = proc_dointvec_minmax,
1860 .procname = "nat_icmp_send",
1861 .maxlen = sizeof(int),
1863 .proc_handler = proc_dointvec,
1866 .procname = "pmtu_disc",
1867 .maxlen = sizeof(int),
1869 .proc_handler = proc_dointvec,
1872 .procname = "backup_only",
1873 .maxlen = sizeof(int),
1875 .proc_handler = proc_dointvec,
1878 .procname = "conn_reuse_mode",
1879 .maxlen = sizeof(int),
1881 .proc_handler = proc_dointvec,
1884 .procname = "schedule_icmp",
1885 .maxlen = sizeof(int),
1887 .proc_handler = proc_dointvec,
1890 .procname = "ignore_tunneled",
1891 .maxlen = sizeof(int),
1893 .proc_handler = proc_dointvec,
1895 #ifdef CONFIG_IP_VS_DEBUG
1897 .procname = "debug_level",
1898 .data = &sysctl_ip_vs_debug_level,
1899 .maxlen = sizeof(int),
1901 .proc_handler = proc_dointvec,
1909 #ifdef CONFIG_PROC_FS
1912 struct seq_net_private p; /* Do not move this, netns depends upon it*/
1913 struct hlist_head *table;
1918 * Write the contents of the VS rule table to a PROCfs file.
1919 * (It is kept just for backward compatibility)
1921 static inline const char *ip_vs_fwd_name(unsigned int flags)
1923 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1924 case IP_VS_CONN_F_LOCALNODE:
1926 case IP_VS_CONN_F_TUNNEL:
1928 case IP_VS_CONN_F_DROUTE:
1936 /* Get the Nth entry in the two lists */
1937 static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1939 struct net *net = seq_file_net(seq);
1940 struct netns_ipvs *ipvs = net_ipvs(net);
1941 struct ip_vs_iter *iter = seq->private;
1943 struct ip_vs_service *svc;
1945 /* look in hash by protocol */
1946 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1947 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
1948 if ((svc->ipvs == ipvs) && pos-- == 0) {
1949 iter->table = ip_vs_svc_table;
1956 /* keep looking in fwmark */
1957 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1958 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1960 if ((svc->ipvs == ipvs) && pos-- == 0) {
1961 iter->table = ip_vs_svc_fwm_table;
1971 static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1975 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1979 static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1981 struct hlist_node *e;
1982 struct ip_vs_iter *iter;
1983 struct ip_vs_service *svc;
1986 if (v == SEQ_START_TOKEN)
1987 return ip_vs_info_array(seq,0);
1990 iter = seq->private;
1992 if (iter->table == ip_vs_svc_table) {
1993 /* next service in table hashed by protocol */
1994 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1996 return hlist_entry(e, struct ip_vs_service, s_list);
1998 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1999 hlist_for_each_entry_rcu(svc,
2000 &ip_vs_svc_table[iter->bucket],
2006 iter->table = ip_vs_svc_fwm_table;
2011 /* next service in hashed by fwmark */
2012 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
2014 return hlist_entry(e, struct ip_vs_service, f_list);
2017 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
2018 hlist_for_each_entry_rcu(svc,
2019 &ip_vs_svc_fwm_table[iter->bucket],
2027 static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
2034 static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
2036 if (v == SEQ_START_TOKEN) {
2038 "IP Virtual Server version %d.%d.%d (size=%d)\n",
2039 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2041 "Prot LocalAddress:Port Scheduler Flags\n");
2043 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
2045 struct net *net = seq_file_net(seq);
2046 struct netns_ipvs *ipvs = net_ipvs(net);
2047 const struct ip_vs_service *svc = v;
2048 const struct ip_vs_iter *iter = seq->private;
2049 const struct ip_vs_dest *dest;
2050 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
2051 char *sched_name = sched ? sched->name : "none";
2053 if (svc->ipvs != ipvs)
2055 if (iter->table == ip_vs_svc_table) {
2056 #ifdef CONFIG_IP_VS_IPV6
2057 if (svc->af == AF_INET6)
2058 seq_printf(seq, "%s [%pI6]:%04X %s ",
2059 ip_vs_proto_name(svc->protocol),
2065 seq_printf(seq, "%s %08X:%04X %s %s ",
2066 ip_vs_proto_name(svc->protocol),
2067 ntohl(svc->addr.ip),
2070 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2072 seq_printf(seq, "FWM %08X %s %s",
2073 svc->fwmark, sched_name,
2074 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2077 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2078 seq_printf(seq, "persistent %d %08X\n",
2080 ntohl(svc->netmask));
2082 seq_putc(seq, '\n');
2084 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
2085 #ifdef CONFIG_IP_VS_IPV6
2086 if (dest->af == AF_INET6)
2089 " %-7s %-6d %-10d %-10d\n",
2092 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2093 atomic_read(&dest->weight),
2094 atomic_read(&dest->activeconns),
2095 atomic_read(&dest->inactconns));
2100 "%-7s %-6d %-10d %-10d\n",
2101 ntohl(dest->addr.ip),
2103 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2104 atomic_read(&dest->weight),
2105 atomic_read(&dest->activeconns),
2106 atomic_read(&dest->inactconns));
2113 static const struct seq_operations ip_vs_info_seq_ops = {
2114 .start = ip_vs_info_seq_start,
2115 .next = ip_vs_info_seq_next,
2116 .stop = ip_vs_info_seq_stop,
2117 .show = ip_vs_info_seq_show,
2120 static int ip_vs_stats_show(struct seq_file *seq, void *v)
2122 struct net *net = seq_file_single_net(seq);
2123 struct ip_vs_kstats show;
2125 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2127 " Total Incoming Outgoing Incoming Outgoing\n");
2129 " Conns Packets Packets Bytes Bytes\n");
2131 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2132 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
2133 (unsigned long long)show.conns,
2134 (unsigned long long)show.inpkts,
2135 (unsigned long long)show.outpkts,
2136 (unsigned long long)show.inbytes,
2137 (unsigned long long)show.outbytes);
2139 /* 01234567 01234567 01234567 0123456701234567 0123456701234567*/
2141 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2142 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
2143 (unsigned long long)show.cps,
2144 (unsigned long long)show.inpps,
2145 (unsigned long long)show.outpps,
2146 (unsigned long long)show.inbps,
2147 (unsigned long long)show.outbps);
2152 static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2154 struct net *net = seq_file_single_net(seq);
2155 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
2156 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
2157 struct ip_vs_kstats kstats;
2160 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2162 " Total Incoming Outgoing Incoming Outgoing\n");
2164 "CPU Conns Packets Packets Bytes Bytes\n");
2166 for_each_possible_cpu(i) {
2167 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2169 u64 conns, inpkts, outpkts, inbytes, outbytes;
2172 start = u64_stats_fetch_begin_irq(&u->syncp);
2173 conns = u->cnt.conns;
2174 inpkts = u->cnt.inpkts;
2175 outpkts = u->cnt.outpkts;
2176 inbytes = u->cnt.inbytes;
2177 outbytes = u->cnt.outbytes;
2178 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2180 seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2181 i, (u64)conns, (u64)inpkts,
2182 (u64)outpkts, (u64)inbytes,
2186 ip_vs_copy_stats(&kstats, tot_stats);
2188 seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2189 (unsigned long long)kstats.conns,
2190 (unsigned long long)kstats.inpkts,
2191 (unsigned long long)kstats.outpkts,
2192 (unsigned long long)kstats.inbytes,
2193 (unsigned long long)kstats.outbytes);
2195 /* ... 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2197 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2198 seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
2210 * Set timeout values for tcp tcpfin udp in the timeout_table.
2212 static int ip_vs_set_timeout(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2214 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2215 struct ip_vs_proto_data *pd;
2218 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2223 #ifdef CONFIG_IP_VS_PROTO_TCP
2224 if (u->tcp_timeout < 0 || u->tcp_timeout > (INT_MAX / HZ) ||
2225 u->tcp_fin_timeout < 0 || u->tcp_fin_timeout > (INT_MAX / HZ)) {
2230 #ifdef CONFIG_IP_VS_PROTO_UDP
2231 if (u->udp_timeout < 0 || u->udp_timeout > (INT_MAX / HZ))
2235 #ifdef CONFIG_IP_VS_PROTO_TCP
2236 if (u->tcp_timeout) {
2237 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2238 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
2239 = u->tcp_timeout * HZ;
2242 if (u->tcp_fin_timeout) {
2243 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2244 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
2245 = u->tcp_fin_timeout * HZ;
2249 #ifdef CONFIG_IP_VS_PROTO_UDP
2250 if (u->udp_timeout) {
2251 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2252 pd->timeout_table[IP_VS_UDP_S_NORMAL]
2253 = u->udp_timeout * HZ;
2259 #define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2261 struct ip_vs_svcdest_user {
2262 struct ip_vs_service_user s;
2263 struct ip_vs_dest_user d;
2266 static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2267 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2268 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2269 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2270 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2271 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2272 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2273 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2274 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2275 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2276 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2279 union ip_vs_set_arglen {
2280 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2281 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2282 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2283 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2284 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2285 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2286 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2287 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2288 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2289 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2292 #define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2294 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2295 struct ip_vs_service_user *usvc_compat)
2297 memset(usvc, 0, sizeof(*usvc));
2300 usvc->protocol = usvc_compat->protocol;
2301 usvc->addr.ip = usvc_compat->addr;
2302 usvc->port = usvc_compat->port;
2303 usvc->fwmark = usvc_compat->fwmark;
2305 /* Deep copy of sched_name is not needed here */
2306 usvc->sched_name = usvc_compat->sched_name;
2308 usvc->flags = usvc_compat->flags;
2309 usvc->timeout = usvc_compat->timeout;
2310 usvc->netmask = usvc_compat->netmask;
2313 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2314 struct ip_vs_dest_user *udest_compat)
2316 memset(udest, 0, sizeof(*udest));
2318 udest->addr.ip = udest_compat->addr;
2319 udest->port = udest_compat->port;
2320 udest->conn_flags = udest_compat->conn_flags;
2321 udest->weight = udest_compat->weight;
2322 udest->u_threshold = udest_compat->u_threshold;
2323 udest->l_threshold = udest_compat->l_threshold;
2324 udest->af = AF_INET;
2328 do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2330 struct net *net = sock_net(sk);
2332 unsigned char arg[MAX_SET_ARGLEN];
2333 struct ip_vs_service_user *usvc_compat;
2334 struct ip_vs_service_user_kern usvc;
2335 struct ip_vs_service *svc;
2336 struct ip_vs_dest_user *udest_compat;
2337 struct ip_vs_dest_user_kern udest;
2338 struct netns_ipvs *ipvs = net_ipvs(net);
2340 BUILD_BUG_ON(sizeof(arg) > 255);
2341 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2344 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2346 if (len != set_arglen[CMDID(cmd)]) {
2347 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2348 len, set_arglen[CMDID(cmd)]);
2352 if (copy_from_user(arg, user, len) != 0)
2355 /* increase the module use count */
2356 ip_vs_use_count_inc();
2358 /* Handle daemons since they have another lock */
2359 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2360 cmd == IP_VS_SO_SET_STOPDAEMON) {
2361 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2363 if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2364 struct ipvs_sync_daemon_cfg cfg;
2366 memset(&cfg, 0, sizeof(cfg));
2368 if (strscpy(cfg.mcast_ifn, dm->mcast_ifn,
2369 sizeof(cfg.mcast_ifn)) <= 0)
2371 cfg.syncid = dm->syncid;
2372 ret = start_sync_thread(ipvs, &cfg, dm->state);
2374 mutex_lock(&ipvs->sync_mutex);
2375 ret = stop_sync_thread(ipvs, dm->state);
2376 mutex_unlock(&ipvs->sync_mutex);
2381 mutex_lock(&__ip_vs_mutex);
2382 if (cmd == IP_VS_SO_SET_FLUSH) {
2383 /* Flush the virtual service */
2384 ret = ip_vs_flush(ipvs, false);
2386 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2387 /* Set timeout values for (tcp tcpfin udp) */
2388 ret = ip_vs_set_timeout(ipvs, (struct ip_vs_timeout_user *)arg);
2392 usvc_compat = (struct ip_vs_service_user *)arg;
2393 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2395 /* We only use the new structs internally, so copy userspace compat
2396 * structs to extended internal versions */
2397 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2398 ip_vs_copy_udest_compat(&udest, udest_compat);
2400 if (cmd == IP_VS_SO_SET_ZERO) {
2401 /* if no service address is set, zero counters in all */
2402 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2403 ret = ip_vs_zero_all(ipvs);
2408 if ((cmd == IP_VS_SO_SET_ADD || cmd == IP_VS_SO_SET_EDIT) &&
2409 strnlen(usvc.sched_name, IP_VS_SCHEDNAME_MAXLEN) ==
2410 IP_VS_SCHEDNAME_MAXLEN) {
2415 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2416 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2417 usvc.protocol != IPPROTO_SCTP) {
2418 pr_err("set_ctl: invalid protocol: %d %pI4:%d\n",
2419 usvc.protocol, &usvc.addr.ip,
2425 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2427 if (usvc.fwmark == 0)
2428 svc = __ip_vs_service_find(ipvs, usvc.af, usvc.protocol,
2429 &usvc.addr, usvc.port);
2431 svc = __ip_vs_svc_fwm_find(ipvs, usvc.af, usvc.fwmark);
2434 if (cmd != IP_VS_SO_SET_ADD
2435 && (svc == NULL || svc->protocol != usvc.protocol)) {
2441 case IP_VS_SO_SET_ADD:
2445 ret = ip_vs_add_service(ipvs, &usvc, &svc);
2447 case IP_VS_SO_SET_EDIT:
2448 ret = ip_vs_edit_service(svc, &usvc);
2450 case IP_VS_SO_SET_DEL:
2451 ret = ip_vs_del_service(svc);
2455 case IP_VS_SO_SET_ZERO:
2456 ret = ip_vs_zero_service(svc);
2458 case IP_VS_SO_SET_ADDDEST:
2459 ret = ip_vs_add_dest(svc, &udest);
2461 case IP_VS_SO_SET_EDITDEST:
2462 ret = ip_vs_edit_dest(svc, &udest);
2464 case IP_VS_SO_SET_DELDEST:
2465 ret = ip_vs_del_dest(svc, &udest);
2472 mutex_unlock(&__ip_vs_mutex);
2474 /* decrease the module use count */
2475 ip_vs_use_count_dec();
2482 ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2484 struct ip_vs_scheduler *sched;
2485 struct ip_vs_kstats kstats;
2488 sched = rcu_dereference_protected(src->scheduler, 1);
2489 sched_name = sched ? sched->name : "none";
2490 dst->protocol = src->protocol;
2491 dst->addr = src->addr.ip;
2492 dst->port = src->port;
2493 dst->fwmark = src->fwmark;
2494 strlcpy(dst->sched_name, sched_name, sizeof(dst->sched_name));
2495 dst->flags = src->flags;
2496 dst->timeout = src->timeout / HZ;
2497 dst->netmask = src->netmask;
2498 dst->num_dests = src->num_dests;
2499 ip_vs_copy_stats(&kstats, &src->stats);
2500 ip_vs_export_stats_user(&dst->stats, &kstats);
2504 __ip_vs_get_service_entries(struct netns_ipvs *ipvs,
2505 const struct ip_vs_get_services *get,
2506 struct ip_vs_get_services __user *uptr)
2509 struct ip_vs_service *svc;
2510 struct ip_vs_service_entry entry;
2513 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2514 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2515 /* Only expose IPv4 entries to old interface */
2516 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2519 if (count >= get->num_services)
2521 memset(&entry, 0, sizeof(entry));
2522 ip_vs_copy_service(&entry, svc);
2523 if (copy_to_user(&uptr->entrytable[count],
2524 &entry, sizeof(entry))) {
2532 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2533 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2534 /* Only expose IPv4 entries to old interface */
2535 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2538 if (count >= get->num_services)
2540 memset(&entry, 0, sizeof(entry));
2541 ip_vs_copy_service(&entry, svc);
2542 if (copy_to_user(&uptr->entrytable[count],
2543 &entry, sizeof(entry))) {
2555 __ip_vs_get_dest_entries(struct netns_ipvs *ipvs, const struct ip_vs_get_dests *get,
2556 struct ip_vs_get_dests __user *uptr)
2558 struct ip_vs_service *svc;
2559 union nf_inet_addr addr = { .ip = get->addr };
2564 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, get->fwmark);
2566 svc = __ip_vs_service_find(ipvs, AF_INET, get->protocol, &addr,
2572 struct ip_vs_dest *dest;
2573 struct ip_vs_dest_entry entry;
2574 struct ip_vs_kstats kstats;
2576 memset(&entry, 0, sizeof(entry));
2577 list_for_each_entry(dest, &svc->destinations, n_list) {
2578 if (count >= get->num_dests)
2581 /* Cannot expose heterogeneous members via sockopt
2584 if (dest->af != svc->af)
2587 entry.addr = dest->addr.ip;
2588 entry.port = dest->port;
2589 entry.conn_flags = atomic_read(&dest->conn_flags);
2590 entry.weight = atomic_read(&dest->weight);
2591 entry.u_threshold = dest->u_threshold;
2592 entry.l_threshold = dest->l_threshold;
2593 entry.activeconns = atomic_read(&dest->activeconns);
2594 entry.inactconns = atomic_read(&dest->inactconns);
2595 entry.persistconns = atomic_read(&dest->persistconns);
2596 ip_vs_copy_stats(&kstats, &dest->stats);
2597 ip_vs_export_stats_user(&entry.stats, &kstats);
2598 if (copy_to_user(&uptr->entrytable[count],
2599 &entry, sizeof(entry))) {
2611 __ip_vs_get_timeouts(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2613 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2614 struct ip_vs_proto_data *pd;
2617 memset(u, 0, sizeof (*u));
2619 #ifdef CONFIG_IP_VS_PROTO_TCP
2620 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2621 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2622 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2624 #ifdef CONFIG_IP_VS_PROTO_UDP
2625 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2627 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2631 static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2632 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2633 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2634 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2635 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2636 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2637 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2638 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2641 union ip_vs_get_arglen {
2642 char field_IP_VS_SO_GET_VERSION[64];
2643 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2644 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2645 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2646 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2647 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2648 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
2651 #define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2654 do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2656 unsigned char arg[MAX_GET_ARGLEN];
2658 unsigned int copylen;
2659 struct net *net = sock_net(sk);
2660 struct netns_ipvs *ipvs = net_ipvs(net);
2663 BUILD_BUG_ON(sizeof(arg) > 255);
2664 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2667 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2670 copylen = get_arglen[CMDID(cmd)];
2671 if (*len < (int) copylen) {
2672 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
2676 if (copy_from_user(arg, user, copylen) != 0)
2679 * Handle daemons first since it has its own locking
2681 if (cmd == IP_VS_SO_GET_DAEMON) {
2682 struct ip_vs_daemon_user d[2];
2684 memset(&d, 0, sizeof(d));
2685 mutex_lock(&ipvs->sync_mutex);
2686 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2687 d[0].state = IP_VS_STATE_MASTER;
2688 strlcpy(d[0].mcast_ifn, ipvs->mcfg.mcast_ifn,
2689 sizeof(d[0].mcast_ifn));
2690 d[0].syncid = ipvs->mcfg.syncid;
2692 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2693 d[1].state = IP_VS_STATE_BACKUP;
2694 strlcpy(d[1].mcast_ifn, ipvs->bcfg.mcast_ifn,
2695 sizeof(d[1].mcast_ifn));
2696 d[1].syncid = ipvs->bcfg.syncid;
2698 if (copy_to_user(user, &d, sizeof(d)) != 0)
2700 mutex_unlock(&ipvs->sync_mutex);
2704 mutex_lock(&__ip_vs_mutex);
2706 case IP_VS_SO_GET_VERSION:
2710 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2711 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2712 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2716 *len = strlen(buf)+1;
2720 case IP_VS_SO_GET_INFO:
2722 struct ip_vs_getinfo info;
2723 info.version = IP_VS_VERSION_CODE;
2724 info.size = ip_vs_conn_tab_size;
2725 info.num_services = ipvs->num_services;
2726 if (copy_to_user(user, &info, sizeof(info)) != 0)
2731 case IP_VS_SO_GET_SERVICES:
2733 struct ip_vs_get_services *get;
2736 get = (struct ip_vs_get_services *)arg;
2737 size = sizeof(*get) +
2738 sizeof(struct ip_vs_service_entry) * get->num_services;
2740 pr_err("length: %u != %u\n", *len, size);
2744 ret = __ip_vs_get_service_entries(ipvs, get, user);
2748 case IP_VS_SO_GET_SERVICE:
2750 struct ip_vs_service_entry *entry;
2751 struct ip_vs_service *svc;
2752 union nf_inet_addr addr;
2754 entry = (struct ip_vs_service_entry *)arg;
2755 addr.ip = entry->addr;
2758 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, entry->fwmark);
2760 svc = __ip_vs_service_find(ipvs, AF_INET,
2761 entry->protocol, &addr,
2765 ip_vs_copy_service(entry, svc);
2766 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2773 case IP_VS_SO_GET_DESTS:
2775 struct ip_vs_get_dests *get;
2778 get = (struct ip_vs_get_dests *)arg;
2779 size = sizeof(*get) +
2780 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2782 pr_err("length: %u != %u\n", *len, size);
2786 ret = __ip_vs_get_dest_entries(ipvs, get, user);
2790 case IP_VS_SO_GET_TIMEOUT:
2792 struct ip_vs_timeout_user t;
2794 __ip_vs_get_timeouts(ipvs, &t);
2795 if (copy_to_user(user, &t, sizeof(t)) != 0)
2805 mutex_unlock(&__ip_vs_mutex);
2810 static struct nf_sockopt_ops ip_vs_sockopts = {
2812 .set_optmin = IP_VS_BASE_CTL,
2813 .set_optmax = IP_VS_SO_SET_MAX+1,
2814 .set = do_ip_vs_set_ctl,
2815 .get_optmin = IP_VS_BASE_CTL,
2816 .get_optmax = IP_VS_SO_GET_MAX+1,
2817 .get = do_ip_vs_get_ctl,
2818 .owner = THIS_MODULE,
2822 * Generic Netlink interface
2825 /* IPVS genetlink family */
2826 static struct genl_family ip_vs_genl_family;
2828 /* Policy used for first-level command attributes */
2829 static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2830 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2831 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2832 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2833 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2834 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2835 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2838 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2839 static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2840 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2841 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2842 .len = IP_VS_IFNAME_MAXLEN - 1 },
2843 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2844 [IPVS_DAEMON_ATTR_SYNC_MAXLEN] = { .type = NLA_U16 },
2845 [IPVS_DAEMON_ATTR_MCAST_GROUP] = { .type = NLA_U32 },
2846 [IPVS_DAEMON_ATTR_MCAST_GROUP6] = { .len = sizeof(struct in6_addr) },
2847 [IPVS_DAEMON_ATTR_MCAST_PORT] = { .type = NLA_U16 },
2848 [IPVS_DAEMON_ATTR_MCAST_TTL] = { .type = NLA_U8 },
2851 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2852 static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2853 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2854 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2855 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2856 .len = sizeof(union nf_inet_addr) },
2857 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2858 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2859 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2860 .len = IP_VS_SCHEDNAME_MAXLEN - 1 },
2861 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2862 .len = IP_VS_PENAME_MAXLEN },
2863 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2864 .len = sizeof(struct ip_vs_flags) },
2865 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2866 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2867 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2870 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2871 static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2872 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2873 .len = sizeof(union nf_inet_addr) },
2874 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2875 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2876 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2877 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2878 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2879 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2880 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2881 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2882 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2883 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
2886 static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2887 struct ip_vs_kstats *kstats)
2889 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2894 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
2895 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
2896 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
2897 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2898 IPVS_STATS_ATTR_PAD) ||
2899 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2900 IPVS_STATS_ATTR_PAD) ||
2901 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
2902 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
2903 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
2904 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
2905 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
2906 goto nla_put_failure;
2907 nla_nest_end(skb, nl_stats);
2912 nla_nest_cancel(skb, nl_stats);
2916 static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
2917 struct ip_vs_kstats *kstats)
2919 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2924 if (nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CONNS, kstats->conns,
2925 IPVS_STATS_ATTR_PAD) ||
2926 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts,
2927 IPVS_STATS_ATTR_PAD) ||
2928 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts,
2929 IPVS_STATS_ATTR_PAD) ||
2930 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2931 IPVS_STATS_ATTR_PAD) ||
2932 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2933 IPVS_STATS_ATTR_PAD) ||
2934 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CPS, kstats->cps,
2935 IPVS_STATS_ATTR_PAD) ||
2936 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps,
2937 IPVS_STATS_ATTR_PAD) ||
2938 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps,
2939 IPVS_STATS_ATTR_PAD) ||
2940 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps,
2941 IPVS_STATS_ATTR_PAD) ||
2942 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps,
2943 IPVS_STATS_ATTR_PAD))
2944 goto nla_put_failure;
2945 nla_nest_end(skb, nl_stats);
2950 nla_nest_cancel(skb, nl_stats);
2954 static int ip_vs_genl_fill_service(struct sk_buff *skb,
2955 struct ip_vs_service *svc)
2957 struct ip_vs_scheduler *sched;
2958 struct ip_vs_pe *pe;
2959 struct nlattr *nl_service;
2960 struct ip_vs_flags flags = { .flags = svc->flags,
2962 struct ip_vs_kstats kstats;
2965 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2969 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2970 goto nla_put_failure;
2972 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2973 goto nla_put_failure;
2975 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2976 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
2977 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
2978 goto nla_put_failure;
2981 sched = rcu_dereference_protected(svc->scheduler, 1);
2982 sched_name = sched ? sched->name : "none";
2983 pe = rcu_dereference_protected(svc->pe, 1);
2984 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched_name) ||
2985 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
2986 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2987 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
2988 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
2989 goto nla_put_failure;
2990 ip_vs_copy_stats(&kstats, &svc->stats);
2991 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
2992 goto nla_put_failure;
2993 if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
2994 goto nla_put_failure;
2996 nla_nest_end(skb, nl_service);
3001 nla_nest_cancel(skb, nl_service);
3005 static int ip_vs_genl_dump_service(struct sk_buff *skb,
3006 struct ip_vs_service *svc,
3007 struct netlink_callback *cb)
3011 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3012 &ip_vs_genl_family, NLM_F_MULTI,
3013 IPVS_CMD_NEW_SERVICE);
3017 if (ip_vs_genl_fill_service(skb, svc) < 0)
3018 goto nla_put_failure;
3020 genlmsg_end(skb, hdr);
3024 genlmsg_cancel(skb, hdr);
3028 static int ip_vs_genl_dump_services(struct sk_buff *skb,
3029 struct netlink_callback *cb)
3032 int start = cb->args[0];
3033 struct ip_vs_service *svc;
3034 struct net *net = sock_net(skb->sk);
3035 struct netns_ipvs *ipvs = net_ipvs(net);
3037 mutex_lock(&__ip_vs_mutex);
3038 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3039 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
3040 if (++idx <= start || (svc->ipvs != ipvs))
3042 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3044 goto nla_put_failure;
3049 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3050 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
3051 if (++idx <= start || (svc->ipvs != ipvs))
3053 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3055 goto nla_put_failure;
3061 mutex_unlock(&__ip_vs_mutex);
3067 static bool ip_vs_is_af_valid(int af)
3071 #ifdef CONFIG_IP_VS_IPV6
3072 if (af == AF_INET6 && ipv6_mod_enabled())
3078 static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs,
3079 struct ip_vs_service_user_kern *usvc,
3080 struct nlattr *nla, int full_entry,
3081 struct ip_vs_service **ret_svc)
3083 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3084 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
3085 struct ip_vs_service *svc;
3087 /* Parse mandatory identifying service fields first */
3089 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla,
3090 ip_vs_svc_policy, NULL))
3093 nla_af = attrs[IPVS_SVC_ATTR_AF];
3094 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3095 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3096 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3097 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3099 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3102 memset(usvc, 0, sizeof(*usvc));
3104 usvc->af = nla_get_u16(nla_af);
3105 if (!ip_vs_is_af_valid(usvc->af))
3106 return -EAFNOSUPPORT;
3109 usvc->protocol = IPPROTO_TCP;
3110 usvc->fwmark = nla_get_u32(nla_fwmark);
3112 usvc->protocol = nla_get_u16(nla_protocol);
3113 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
3114 usvc->port = nla_get_be16(nla_port);
3120 svc = __ip_vs_svc_fwm_find(ipvs, usvc->af, usvc->fwmark);
3122 svc = __ip_vs_service_find(ipvs, usvc->af, usvc->protocol,
3123 &usvc->addr, usvc->port);
3127 /* If a full entry was requested, check for the additional fields */
3129 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
3131 struct ip_vs_flags flags;
3133 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
3134 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
3135 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3136 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3137 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3139 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3142 nla_memcpy(&flags, nla_flags, sizeof(flags));
3144 /* prefill flags from service if it already exists */
3146 usvc->flags = svc->flags;
3148 /* set new flags from userland */
3149 usvc->flags = (usvc->flags & ~flags.mask) |
3150 (flags.flags & flags.mask);
3151 usvc->sched_name = nla_data(nla_sched);
3152 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
3153 usvc->timeout = nla_get_u32(nla_timeout);
3154 usvc->netmask = nla_get_be32(nla_netmask);
3160 static struct ip_vs_service *ip_vs_genl_find_service(struct netns_ipvs *ipvs,
3163 struct ip_vs_service_user_kern usvc;
3164 struct ip_vs_service *svc;
3167 ret = ip_vs_genl_parse_service(ipvs, &usvc, nla, 0, &svc);
3168 return ret ? ERR_PTR(ret) : svc;
3171 static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3173 struct nlattr *nl_dest;
3174 struct ip_vs_kstats kstats;
3176 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3180 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
3181 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
3182 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3183 (atomic_read(&dest->conn_flags) &
3184 IP_VS_CONN_F_FWD_MASK)) ||
3185 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3186 atomic_read(&dest->weight)) ||
3187 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3188 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3189 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3190 atomic_read(&dest->activeconns)) ||
3191 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3192 atomic_read(&dest->inactconns)) ||
3193 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
3194 atomic_read(&dest->persistconns)) ||
3195 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
3196 goto nla_put_failure;
3197 ip_vs_copy_stats(&kstats, &dest->stats);
3198 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
3199 goto nla_put_failure;
3200 if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
3201 goto nla_put_failure;
3203 nla_nest_end(skb, nl_dest);
3208 nla_nest_cancel(skb, nl_dest);
3212 static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3213 struct netlink_callback *cb)
3217 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3218 &ip_vs_genl_family, NLM_F_MULTI,
3223 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3224 goto nla_put_failure;
3226 genlmsg_end(skb, hdr);
3230 genlmsg_cancel(skb, hdr);
3234 static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3235 struct netlink_callback *cb)
3238 int start = cb->args[0];
3239 struct ip_vs_service *svc;
3240 struct ip_vs_dest *dest;
3241 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
3242 struct net *net = sock_net(skb->sk);
3243 struct netns_ipvs *ipvs = net_ipvs(net);
3245 mutex_lock(&__ip_vs_mutex);
3247 /* Try to find the service for which to dump destinations */
3248 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, IPVS_CMD_ATTR_MAX,
3249 ip_vs_cmd_policy, cb->extack))
3253 svc = ip_vs_genl_find_service(ipvs, attrs[IPVS_CMD_ATTR_SERVICE]);
3254 if (IS_ERR_OR_NULL(svc))
3257 /* Dump the destinations */
3258 list_for_each_entry(dest, &svc->destinations, n_list) {
3261 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3263 goto nla_put_failure;
3271 mutex_unlock(&__ip_vs_mutex);
3276 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
3277 struct nlattr *nla, int full_entry)
3279 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3280 struct nlattr *nla_addr, *nla_port;
3281 struct nlattr *nla_addr_family;
3283 /* Parse mandatory identifying destination fields first */
3285 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla,
3286 ip_vs_dest_policy, NULL))
3289 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3290 nla_port = attrs[IPVS_DEST_ATTR_PORT];
3291 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
3293 if (!(nla_addr && nla_port))
3296 memset(udest, 0, sizeof(*udest));
3298 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
3299 udest->port = nla_get_be16(nla_port);
3301 if (nla_addr_family)
3302 udest->af = nla_get_u16(nla_addr_family);
3306 /* If a full entry was requested, check for the additional fields */
3308 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3311 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3312 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3313 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3314 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3316 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3319 udest->conn_flags = nla_get_u32(nla_fwd)
3320 & IP_VS_CONN_F_FWD_MASK;
3321 udest->weight = nla_get_u32(nla_weight);
3322 udest->u_threshold = nla_get_u32(nla_u_thresh);
3323 udest->l_threshold = nla_get_u32(nla_l_thresh);
3329 static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3330 struct ipvs_sync_daemon_cfg *c)
3332 struct nlattr *nl_daemon;
3334 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3338 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3339 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, c->mcast_ifn) ||
3340 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, c->syncid) ||
3341 nla_put_u16(skb, IPVS_DAEMON_ATTR_SYNC_MAXLEN, c->sync_maxlen) ||
3342 nla_put_u16(skb, IPVS_DAEMON_ATTR_MCAST_PORT, c->mcast_port) ||
3343 nla_put_u8(skb, IPVS_DAEMON_ATTR_MCAST_TTL, c->mcast_ttl))
3344 goto nla_put_failure;
3345 #ifdef CONFIG_IP_VS_IPV6
3346 if (c->mcast_af == AF_INET6) {
3347 if (nla_put_in6_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP6,
3348 &c->mcast_group.in6))
3349 goto nla_put_failure;
3352 if (c->mcast_af == AF_INET &&
3353 nla_put_in_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP,
3355 goto nla_put_failure;
3356 nla_nest_end(skb, nl_daemon);
3361 nla_nest_cancel(skb, nl_daemon);
3365 static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3366 struct ipvs_sync_daemon_cfg *c,
3367 struct netlink_callback *cb)
3370 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3371 &ip_vs_genl_family, NLM_F_MULTI,
3372 IPVS_CMD_NEW_DAEMON);
3376 if (ip_vs_genl_fill_daemon(skb, state, c))
3377 goto nla_put_failure;
3379 genlmsg_end(skb, hdr);
3383 genlmsg_cancel(skb, hdr);
3387 static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3388 struct netlink_callback *cb)
3390 struct net *net = sock_net(skb->sk);
3391 struct netns_ipvs *ipvs = net_ipvs(net);
3393 mutex_lock(&ipvs->sync_mutex);
3394 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
3395 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
3396 &ipvs->mcfg, cb) < 0)
3397 goto nla_put_failure;
3402 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3403 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3404 &ipvs->bcfg, cb) < 0)
3405 goto nla_put_failure;
3411 mutex_unlock(&ipvs->sync_mutex);
3416 static int ip_vs_genl_new_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3418 struct ipvs_sync_daemon_cfg c;
3422 memset(&c, 0, sizeof(c));
3423 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3424 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3425 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3427 strlcpy(c.mcast_ifn, nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3428 sizeof(c.mcast_ifn));
3429 c.syncid = nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]);
3431 a = attrs[IPVS_DAEMON_ATTR_SYNC_MAXLEN];
3433 c.sync_maxlen = nla_get_u16(a);
3435 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP];
3437 c.mcast_af = AF_INET;
3438 c.mcast_group.ip = nla_get_in_addr(a);
3439 if (!ipv4_is_multicast(c.mcast_group.ip))
3442 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP6];
3444 #ifdef CONFIG_IP_VS_IPV6
3447 c.mcast_af = AF_INET6;
3448 c.mcast_group.in6 = nla_get_in6_addr(a);
3449 addr_type = ipv6_addr_type(&c.mcast_group.in6);
3450 if (!(addr_type & IPV6_ADDR_MULTICAST))
3453 return -EAFNOSUPPORT;
3458 a = attrs[IPVS_DAEMON_ATTR_MCAST_PORT];
3460 c.mcast_port = nla_get_u16(a);
3462 a = attrs[IPVS_DAEMON_ATTR_MCAST_TTL];
3464 c.mcast_ttl = nla_get_u8(a);
3466 /* The synchronization protocol is incompatible with mixed family
3469 if (ipvs->mixed_address_family_dests > 0)
3472 ret = start_sync_thread(ipvs, &c,
3473 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3477 static int ip_vs_genl_del_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3481 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3484 mutex_lock(&ipvs->sync_mutex);
3485 ret = stop_sync_thread(ipvs,
3486 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3487 mutex_unlock(&ipvs->sync_mutex);
3491 static int ip_vs_genl_set_config(struct netns_ipvs *ipvs, struct nlattr **attrs)
3493 struct ip_vs_timeout_user t;
3495 __ip_vs_get_timeouts(ipvs, &t);
3497 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3498 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3500 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3502 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3504 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3505 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3507 return ip_vs_set_timeout(ipvs, &t);
3510 static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
3512 int ret = -EINVAL, cmd;
3513 struct net *net = sock_net(skb->sk);
3514 struct netns_ipvs *ipvs = net_ipvs(net);
3516 cmd = info->genlhdr->cmd;
3518 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
3519 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3521 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3522 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3523 info->attrs[IPVS_CMD_ATTR_DAEMON],
3524 ip_vs_daemon_policy, info->extack))
3527 if (cmd == IPVS_CMD_NEW_DAEMON)
3528 ret = ip_vs_genl_new_daemon(ipvs, daemon_attrs);
3530 ret = ip_vs_genl_del_daemon(ipvs, daemon_attrs);
3537 static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3539 struct ip_vs_service *svc = NULL;
3540 struct ip_vs_service_user_kern usvc;
3541 struct ip_vs_dest_user_kern udest;
3543 int need_full_svc = 0, need_full_dest = 0;
3544 struct net *net = sock_net(skb->sk);
3545 struct netns_ipvs *ipvs = net_ipvs(net);
3547 cmd = info->genlhdr->cmd;
3549 mutex_lock(&__ip_vs_mutex);
3551 if (cmd == IPVS_CMD_FLUSH) {
3552 ret = ip_vs_flush(ipvs, false);
3554 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3555 ret = ip_vs_genl_set_config(ipvs, info->attrs);
3557 } else if (cmd == IPVS_CMD_ZERO &&
3558 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3559 ret = ip_vs_zero_all(ipvs);
3563 /* All following commands require a service argument, so check if we
3564 * received a valid one. We need a full service specification when
3565 * adding / editing a service. Only identifying members otherwise. */
3566 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3569 ret = ip_vs_genl_parse_service(ipvs, &usvc,
3570 info->attrs[IPVS_CMD_ATTR_SERVICE],
3571 need_full_svc, &svc);
3575 /* Unless we're adding a new service, the service must already exist */
3576 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3581 /* Destination commands require a valid destination argument. For
3582 * adding / editing a destination, we need a full destination
3584 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3585 cmd == IPVS_CMD_DEL_DEST) {
3586 if (cmd != IPVS_CMD_DEL_DEST)
3589 ret = ip_vs_genl_parse_dest(&udest,
3590 info->attrs[IPVS_CMD_ATTR_DEST],
3595 /* Old protocols did not allow the user to specify address
3596 * family, so we set it to zero instead. We also didn't
3597 * allow heterogeneous pools in the old code, so it's safe
3598 * to assume that this will have the same address family as
3604 if (!ip_vs_is_af_valid(udest.af)) {
3605 ret = -EAFNOSUPPORT;
3609 if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
3610 /* The synchronization protocol is incompatible
3611 * with mixed family services
3613 if (ipvs->sync_state) {
3618 /* Which connection types do we support? */
3619 switch (udest.conn_flags) {
3620 case IP_VS_CONN_F_TUNNEL:
3621 /* We are able to forward this */
3631 case IPVS_CMD_NEW_SERVICE:
3633 ret = ip_vs_add_service(ipvs, &usvc, &svc);
3637 case IPVS_CMD_SET_SERVICE:
3638 ret = ip_vs_edit_service(svc, &usvc);
3640 case IPVS_CMD_DEL_SERVICE:
3641 ret = ip_vs_del_service(svc);
3642 /* do not use svc, it can be freed */
3644 case IPVS_CMD_NEW_DEST:
3645 ret = ip_vs_add_dest(svc, &udest);
3647 case IPVS_CMD_SET_DEST:
3648 ret = ip_vs_edit_dest(svc, &udest);
3650 case IPVS_CMD_DEL_DEST:
3651 ret = ip_vs_del_dest(svc, &udest);
3654 ret = ip_vs_zero_service(svc);
3661 mutex_unlock(&__ip_vs_mutex);
3666 static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3668 struct sk_buff *msg;
3670 int ret, cmd, reply_cmd;
3671 struct net *net = sock_net(skb->sk);
3672 struct netns_ipvs *ipvs = net_ipvs(net);
3674 cmd = info->genlhdr->cmd;
3676 if (cmd == IPVS_CMD_GET_SERVICE)
3677 reply_cmd = IPVS_CMD_NEW_SERVICE;
3678 else if (cmd == IPVS_CMD_GET_INFO)
3679 reply_cmd = IPVS_CMD_SET_INFO;
3680 else if (cmd == IPVS_CMD_GET_CONFIG)
3681 reply_cmd = IPVS_CMD_SET_CONFIG;
3683 pr_err("unknown Generic Netlink command\n");
3687 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3691 mutex_lock(&__ip_vs_mutex);
3693 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3695 goto nla_put_failure;
3698 case IPVS_CMD_GET_SERVICE:
3700 struct ip_vs_service *svc;
3702 svc = ip_vs_genl_find_service(ipvs,
3703 info->attrs[IPVS_CMD_ATTR_SERVICE]);
3708 ret = ip_vs_genl_fill_service(msg, svc);
3710 goto nla_put_failure;
3719 case IPVS_CMD_GET_CONFIG:
3721 struct ip_vs_timeout_user t;
3723 __ip_vs_get_timeouts(ipvs, &t);
3724 #ifdef CONFIG_IP_VS_PROTO_TCP
3725 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3727 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3729 goto nla_put_failure;
3731 #ifdef CONFIG_IP_VS_PROTO_UDP
3732 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3733 goto nla_put_failure;
3739 case IPVS_CMD_GET_INFO:
3740 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3741 IP_VS_VERSION_CODE) ||
3742 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3743 ip_vs_conn_tab_size))
3744 goto nla_put_failure;
3748 genlmsg_end(msg, reply);
3749 ret = genlmsg_reply(msg, info);
3753 pr_err("not enough space in Netlink message\n");
3759 mutex_unlock(&__ip_vs_mutex);
3765 static const struct genl_ops ip_vs_genl_ops[] = {
3767 .cmd = IPVS_CMD_NEW_SERVICE,
3768 .flags = GENL_ADMIN_PERM,
3769 .policy = ip_vs_cmd_policy,
3770 .doit = ip_vs_genl_set_cmd,
3773 .cmd = IPVS_CMD_SET_SERVICE,
3774 .flags = GENL_ADMIN_PERM,
3775 .policy = ip_vs_cmd_policy,
3776 .doit = ip_vs_genl_set_cmd,
3779 .cmd = IPVS_CMD_DEL_SERVICE,
3780 .flags = GENL_ADMIN_PERM,
3781 .policy = ip_vs_cmd_policy,
3782 .doit = ip_vs_genl_set_cmd,
3785 .cmd = IPVS_CMD_GET_SERVICE,
3786 .flags = GENL_ADMIN_PERM,
3787 .doit = ip_vs_genl_get_cmd,
3788 .dumpit = ip_vs_genl_dump_services,
3789 .policy = ip_vs_cmd_policy,
3792 .cmd = IPVS_CMD_NEW_DEST,
3793 .flags = GENL_ADMIN_PERM,
3794 .policy = ip_vs_cmd_policy,
3795 .doit = ip_vs_genl_set_cmd,
3798 .cmd = IPVS_CMD_SET_DEST,
3799 .flags = GENL_ADMIN_PERM,
3800 .policy = ip_vs_cmd_policy,
3801 .doit = ip_vs_genl_set_cmd,
3804 .cmd = IPVS_CMD_DEL_DEST,
3805 .flags = GENL_ADMIN_PERM,
3806 .policy = ip_vs_cmd_policy,
3807 .doit = ip_vs_genl_set_cmd,
3810 .cmd = IPVS_CMD_GET_DEST,
3811 .flags = GENL_ADMIN_PERM,
3812 .policy = ip_vs_cmd_policy,
3813 .dumpit = ip_vs_genl_dump_dests,
3816 .cmd = IPVS_CMD_NEW_DAEMON,
3817 .flags = GENL_ADMIN_PERM,
3818 .policy = ip_vs_cmd_policy,
3819 .doit = ip_vs_genl_set_daemon,
3822 .cmd = IPVS_CMD_DEL_DAEMON,
3823 .flags = GENL_ADMIN_PERM,
3824 .policy = ip_vs_cmd_policy,
3825 .doit = ip_vs_genl_set_daemon,
3828 .cmd = IPVS_CMD_GET_DAEMON,
3829 .flags = GENL_ADMIN_PERM,
3830 .dumpit = ip_vs_genl_dump_daemons,
3833 .cmd = IPVS_CMD_SET_CONFIG,
3834 .flags = GENL_ADMIN_PERM,
3835 .policy = ip_vs_cmd_policy,
3836 .doit = ip_vs_genl_set_cmd,
3839 .cmd = IPVS_CMD_GET_CONFIG,
3840 .flags = GENL_ADMIN_PERM,
3841 .doit = ip_vs_genl_get_cmd,
3844 .cmd = IPVS_CMD_GET_INFO,
3845 .flags = GENL_ADMIN_PERM,
3846 .doit = ip_vs_genl_get_cmd,
3849 .cmd = IPVS_CMD_ZERO,
3850 .flags = GENL_ADMIN_PERM,
3851 .policy = ip_vs_cmd_policy,
3852 .doit = ip_vs_genl_set_cmd,
3855 .cmd = IPVS_CMD_FLUSH,
3856 .flags = GENL_ADMIN_PERM,
3857 .doit = ip_vs_genl_set_cmd,
3861 static struct genl_family ip_vs_genl_family __ro_after_init = {
3863 .name = IPVS_GENL_NAME,
3864 .version = IPVS_GENL_VERSION,
3865 .maxattr = IPVS_CMD_ATTR_MAX,
3866 .netnsok = true, /* Make ipvsadm to work on netns */
3867 .module = THIS_MODULE,
3868 .ops = ip_vs_genl_ops,
3869 .n_ops = ARRAY_SIZE(ip_vs_genl_ops),
3872 static int __init ip_vs_genl_register(void)
3874 return genl_register_family(&ip_vs_genl_family);
3877 static void ip_vs_genl_unregister(void)
3879 genl_unregister_family(&ip_vs_genl_family);
3882 /* End of Generic Netlink interface definitions */
3885 * per netns intit/exit func.
3887 #ifdef CONFIG_SYSCTL
3888 static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs)
3890 struct net *net = ipvs->net;
3892 struct ctl_table *tbl;
3894 atomic_set(&ipvs->dropentry, 0);
3895 spin_lock_init(&ipvs->dropentry_lock);
3896 spin_lock_init(&ipvs->droppacket_lock);
3897 spin_lock_init(&ipvs->securetcp_lock);
3899 if (!net_eq(net, &init_net)) {
3900 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3904 /* Don't export sysctls to unprivileged users */
3905 if (net->user_ns != &init_user_ns)
3906 tbl[0].procname = NULL;
3909 /* Initialize sysctl defaults */
3910 for (idx = 0; idx < ARRAY_SIZE(vs_vars); idx++) {
3911 if (tbl[idx].proc_handler == proc_do_defense_mode)
3912 tbl[idx].extra2 = ipvs;
3915 ipvs->sysctl_amemthresh = 1024;
3916 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3917 ipvs->sysctl_am_droprate = 10;
3918 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3919 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3920 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3921 #ifdef CONFIG_IP_VS_NFCT
3922 tbl[idx++].data = &ipvs->sysctl_conntrack;
3924 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3925 ipvs->sysctl_snat_reroute = 1;
3926 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3927 ipvs->sysctl_sync_ver = 1;
3928 tbl[idx++].data = &ipvs->sysctl_sync_ver;
3929 ipvs->sysctl_sync_ports = 1;
3930 tbl[idx++].data = &ipvs->sysctl_sync_ports;
3931 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
3932 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3933 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3934 ipvs->sysctl_sync_sock_size = 0;
3935 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
3936 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3937 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
3938 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3939 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
3940 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
3941 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3942 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
3943 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3944 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
3945 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3946 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3947 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3948 tbl[idx++].data = &ipvs->sysctl_sync_retries;
3949 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3950 ipvs->sysctl_pmtu_disc = 1;
3951 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
3952 tbl[idx++].data = &ipvs->sysctl_backup_only;
3953 ipvs->sysctl_conn_reuse_mode = 1;
3954 tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
3955 tbl[idx++].data = &ipvs->sysctl_schedule_icmp;
3956 tbl[idx++].data = &ipvs->sysctl_ignore_tunneled;
3958 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
3959 if (ipvs->sysctl_hdr == NULL) {
3960 if (!net_eq(net, &init_net))
3964 ip_vs_start_estimator(ipvs, &ipvs->tot_stats);
3965 ipvs->sysctl_tbl = tbl;
3966 /* Schedule defense work */
3967 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3968 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
3973 static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs)
3975 struct net *net = ipvs->net;
3977 cancel_delayed_work_sync(&ipvs->defense_work);
3978 cancel_work_sync(&ipvs->defense_work.work);
3979 unregister_net_sysctl_table(ipvs->sysctl_hdr);
3980 ip_vs_stop_estimator(ipvs, &ipvs->tot_stats);
3982 if (!net_eq(net, &init_net))
3983 kfree(ipvs->sysctl_tbl);
3988 static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs) { return 0; }
3989 static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs) { }
3993 static struct notifier_block ip_vs_dst_notifier = {
3994 .notifier_call = ip_vs_dst_event,
3995 #ifdef CONFIG_IP_VS_IPV6
3996 .priority = ADDRCONF_NOTIFY_PRIORITY + 5,
4000 int __net_init ip_vs_control_net_init(struct netns_ipvs *ipvs)
4004 /* Initialize rs_table */
4005 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
4006 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
4008 INIT_LIST_HEAD(&ipvs->dest_trash);
4009 spin_lock_init(&ipvs->dest_trash_lock);
4010 timer_setup(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire, 0);
4011 atomic_set(&ipvs->ftpsvc_counter, 0);
4012 atomic_set(&ipvs->nullsvc_counter, 0);
4013 atomic_set(&ipvs->conn_out_counter, 0);
4016 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
4017 if (!ipvs->tot_stats.cpustats)
4020 for_each_possible_cpu(i) {
4021 struct ip_vs_cpu_stats *ipvs_tot_stats;
4022 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
4023 u64_stats_init(&ipvs_tot_stats->syncp);
4026 spin_lock_init(&ipvs->tot_stats.lock);
4028 proc_create_net("ip_vs", 0, ipvs->net->proc_net, &ip_vs_info_seq_ops,
4029 sizeof(struct ip_vs_iter));
4030 proc_create_net_single("ip_vs_stats", 0, ipvs->net->proc_net,
4031 ip_vs_stats_show, NULL);
4032 proc_create_net_single("ip_vs_stats_percpu", 0, ipvs->net->proc_net,
4033 ip_vs_stats_percpu_show, NULL);
4035 if (ip_vs_control_net_init_sysctl(ipvs))
4041 free_percpu(ipvs->tot_stats.cpustats);
4045 void __net_exit ip_vs_control_net_cleanup(struct netns_ipvs *ipvs)
4047 ip_vs_trash_cleanup(ipvs);
4048 ip_vs_control_net_cleanup_sysctl(ipvs);
4049 remove_proc_entry("ip_vs_stats_percpu", ipvs->net->proc_net);
4050 remove_proc_entry("ip_vs_stats", ipvs->net->proc_net);
4051 remove_proc_entry("ip_vs", ipvs->net->proc_net);
4052 free_percpu(ipvs->tot_stats.cpustats);
4055 int __init ip_vs_register_nl_ioctl(void)
4059 ret = nf_register_sockopt(&ip_vs_sockopts);
4061 pr_err("cannot register sockopt.\n");
4065 ret = ip_vs_genl_register();
4067 pr_err("cannot register Generic Netlink interface.\n");
4073 nf_unregister_sockopt(&ip_vs_sockopts);
4078 void ip_vs_unregister_nl_ioctl(void)
4080 ip_vs_genl_unregister();
4081 nf_unregister_sockopt(&ip_vs_sockopts);
4084 int __init ip_vs_control_init(void)
4091 /* Initialize svc_table, ip_vs_svc_fwm_table */
4092 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
4093 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
4094 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
4097 smp_wmb(); /* Do we really need it now ? */
4099 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
4108 void ip_vs_control_cleanup(void)
4111 unregister_netdevice_notifier(&ip_vs_dst_notifier);