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 %pF\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 %pF\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 /* set the weight and the flags */
825 atomic_set(&dest->weight, udest->weight);
826 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
827 conn_flags |= IP_VS_CONN_F_INACTIVE;
829 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
830 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
831 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
834 * Put the real service in rs_table if not present.
835 * For now only for NAT!
837 ip_vs_rs_hash(ipvs, dest);
839 atomic_set(&dest->conn_flags, conn_flags);
841 /* bind the service */
842 old_svc = rcu_dereference_protected(dest->svc, 1);
844 __ip_vs_bind_svc(dest, svc);
846 if (old_svc != svc) {
847 ip_vs_zero_stats(&dest->stats);
848 __ip_vs_bind_svc(dest, svc);
849 __ip_vs_svc_put(old_svc, true);
853 /* set the dest status flags */
854 dest->flags |= IP_VS_DEST_F_AVAILABLE;
856 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
857 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
858 dest->u_threshold = udest->u_threshold;
859 dest->l_threshold = udest->l_threshold;
861 dest->af = udest->af;
863 spin_lock_bh(&dest->dst_lock);
864 __ip_vs_dst_cache_reset(dest);
865 spin_unlock_bh(&dest->dst_lock);
868 ip_vs_start_estimator(svc->ipvs, &dest->stats);
869 list_add_rcu(&dest->n_list, &svc->destinations);
871 sched = rcu_dereference_protected(svc->scheduler, 1);
872 if (sched && sched->add_dest)
873 sched->add_dest(svc, dest);
875 sched = rcu_dereference_protected(svc->scheduler, 1);
876 if (sched && sched->upd_dest)
877 sched->upd_dest(svc, dest);
883 * Create a destination for the given service
886 ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
887 struct ip_vs_dest **dest_p)
889 struct ip_vs_dest *dest;
890 unsigned int atype, i;
894 #ifdef CONFIG_IP_VS_IPV6
895 if (udest->af == AF_INET6) {
896 atype = ipv6_addr_type(&udest->addr.in6);
897 if ((!(atype & IPV6_ADDR_UNICAST) ||
898 atype & IPV6_ADDR_LINKLOCAL) &&
899 !__ip_vs_addr_is_local_v6(svc->ipvs->net, &udest->addr.in6))
904 atype = inet_addr_type(svc->ipvs->net, udest->addr.ip);
905 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
909 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
913 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
914 if (!dest->stats.cpustats)
917 for_each_possible_cpu(i) {
918 struct ip_vs_cpu_stats *ip_vs_dest_stats;
919 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
920 u64_stats_init(&ip_vs_dest_stats->syncp);
923 dest->af = udest->af;
924 dest->protocol = svc->protocol;
925 dest->vaddr = svc->addr;
926 dest->vport = svc->port;
927 dest->vfwmark = svc->fwmark;
928 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
929 dest->port = udest->port;
931 atomic_set(&dest->activeconns, 0);
932 atomic_set(&dest->inactconns, 0);
933 atomic_set(&dest->persistconns, 0);
934 refcount_set(&dest->refcnt, 1);
936 INIT_HLIST_NODE(&dest->d_list);
937 spin_lock_init(&dest->dst_lock);
938 spin_lock_init(&dest->stats.lock);
939 __ip_vs_update_dest(svc, dest, udest, 1);
953 * Add a destination into an existing service
956 ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
958 struct ip_vs_dest *dest;
959 union nf_inet_addr daddr;
960 __be16 dport = udest->port;
965 if (udest->weight < 0) {
966 pr_err("%s(): server weight less than zero\n", __func__);
970 if (udest->l_threshold > udest->u_threshold) {
971 pr_err("%s(): lower threshold is higher than upper threshold\n",
976 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
978 /* We use function that requires RCU lock */
980 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
984 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
989 * Check if the dest already exists in the trash and
990 * is from the same service
992 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
995 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
996 "dest->refcnt=%d, service %u/%s:%u\n",
997 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
998 refcount_read(&dest->refcnt),
1000 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
1001 ntohs(dest->vport));
1003 __ip_vs_update_dest(svc, dest, udest, 1);
1007 * Allocate and initialize the dest structure
1009 ret = ip_vs_new_dest(svc, udest, &dest);
1018 * Edit a destination in the given service
1021 ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1023 struct ip_vs_dest *dest;
1024 union nf_inet_addr daddr;
1025 __be16 dport = udest->port;
1029 if (udest->weight < 0) {
1030 pr_err("%s(): server weight less than zero\n", __func__);
1034 if (udest->l_threshold > udest->u_threshold) {
1035 pr_err("%s(): lower threshold is higher than upper threshold\n",
1040 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
1042 /* We use function that requires RCU lock */
1044 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
1048 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1052 __ip_vs_update_dest(svc, dest, udest, 0);
1059 * Delete a destination (must be already unlinked from the service)
1061 static void __ip_vs_del_dest(struct netns_ipvs *ipvs, struct ip_vs_dest *dest,
1064 ip_vs_stop_estimator(ipvs, &dest->stats);
1067 * Remove it from the d-linked list with the real services.
1069 ip_vs_rs_unhash(dest);
1071 spin_lock_bh(&ipvs->dest_trash_lock);
1072 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1073 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1074 refcount_read(&dest->refcnt));
1075 if (list_empty(&ipvs->dest_trash) && !cleanup)
1076 mod_timer(&ipvs->dest_trash_timer,
1077 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1078 /* dest lives in trash with reference */
1079 list_add(&dest->t_list, &ipvs->dest_trash);
1080 dest->idle_start = 0;
1081 spin_unlock_bh(&ipvs->dest_trash_lock);
1086 * Unlink a destination from the given service
1088 static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1089 struct ip_vs_dest *dest,
1092 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1095 * Remove it from the d-linked destination list.
1097 list_del_rcu(&dest->n_list);
1100 if (dest->af != svc->af)
1101 svc->ipvs->mixed_address_family_dests--;
1104 struct ip_vs_scheduler *sched;
1106 sched = rcu_dereference_protected(svc->scheduler, 1);
1107 if (sched && sched->del_dest)
1108 sched->del_dest(svc, dest);
1114 * Delete a destination server in the given service
1117 ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1119 struct ip_vs_dest *dest;
1120 __be16 dport = udest->port;
1124 /* We use function that requires RCU lock */
1126 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
1130 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1135 * Unlink dest from the service
1137 __ip_vs_unlink_dest(svc, dest, 1);
1140 * Delete the destination
1142 __ip_vs_del_dest(svc->ipvs, dest, false);
1149 static void ip_vs_dest_trash_expire(struct timer_list *t)
1151 struct netns_ipvs *ipvs = from_timer(ipvs, t, dest_trash_timer);
1152 struct ip_vs_dest *dest, *next;
1153 unsigned long now = jiffies;
1155 spin_lock(&ipvs->dest_trash_lock);
1156 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
1157 if (refcount_read(&dest->refcnt) > 1)
1159 if (dest->idle_start) {
1160 if (time_before(now, dest->idle_start +
1161 IP_VS_DEST_TRASH_PERIOD))
1164 dest->idle_start = max(1UL, now);
1167 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1169 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1171 list_del(&dest->t_list);
1172 ip_vs_dest_free(dest);
1174 if (!list_empty(&ipvs->dest_trash))
1175 mod_timer(&ipvs->dest_trash_timer,
1176 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1177 spin_unlock(&ipvs->dest_trash_lock);
1181 * Add a service into the service hash table
1184 ip_vs_add_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *u,
1185 struct ip_vs_service **svc_p)
1188 struct ip_vs_scheduler *sched = NULL;
1189 struct ip_vs_pe *pe = NULL;
1190 struct ip_vs_service *svc = NULL;
1192 /* increase the module use count */
1193 ip_vs_use_count_inc();
1195 /* Lookup the scheduler by 'u->sched_name' */
1196 if (strcmp(u->sched_name, "none")) {
1197 sched = ip_vs_scheduler_get(u->sched_name);
1199 pr_info("Scheduler module ip_vs_%s not found\n",
1206 if (u->pe_name && *u->pe_name) {
1207 pe = ip_vs_pe_getbyname(u->pe_name);
1209 pr_info("persistence engine module ip_vs_pe_%s "
1210 "not found\n", u->pe_name);
1216 #ifdef CONFIG_IP_VS_IPV6
1217 if (u->af == AF_INET6) {
1218 __u32 plen = (__force __u32) u->netmask;
1220 if (plen < 1 || plen > 128) {
1227 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1229 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1233 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
1234 if (!svc->stats.cpustats) {
1239 for_each_possible_cpu(i) {
1240 struct ip_vs_cpu_stats *ip_vs_stats;
1241 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1242 u64_stats_init(&ip_vs_stats->syncp);
1246 /* I'm the first user of the service */
1247 atomic_set(&svc->refcnt, 0);
1250 svc->protocol = u->protocol;
1251 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1252 svc->port = u->port;
1253 svc->fwmark = u->fwmark;
1254 svc->flags = u->flags;
1255 svc->timeout = u->timeout * HZ;
1256 svc->netmask = u->netmask;
1259 INIT_LIST_HEAD(&svc->destinations);
1260 spin_lock_init(&svc->sched_lock);
1261 spin_lock_init(&svc->stats.lock);
1263 /* Bind the scheduler */
1265 ret = ip_vs_bind_scheduler(svc, sched);
1271 /* Bind the ct retriever */
1272 RCU_INIT_POINTER(svc->pe, pe);
1275 /* Update the virtual service counters */
1276 if (svc->port == FTPPORT)
1277 atomic_inc(&ipvs->ftpsvc_counter);
1278 else if (svc->port == 0)
1279 atomic_inc(&ipvs->nullsvc_counter);
1280 if (svc->pe && svc->pe->conn_out)
1281 atomic_inc(&ipvs->conn_out_counter);
1283 ip_vs_start_estimator(ipvs, &svc->stats);
1285 /* Count only IPv4 services for old get/setsockopt interface */
1286 if (svc->af == AF_INET)
1287 ipvs->num_services++;
1289 /* Hash the service into the service table */
1290 ip_vs_svc_hash(svc);
1293 /* Now there is a service - full throttle */
1300 ip_vs_unbind_scheduler(svc, sched);
1301 ip_vs_service_free(svc);
1303 ip_vs_scheduler_put(sched);
1306 /* decrease the module use count */
1307 ip_vs_use_count_dec();
1314 * Edit a service and bind it with a new scheduler
1317 ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1319 struct ip_vs_scheduler *sched = NULL, *old_sched;
1320 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1322 bool new_pe_conn_out, old_pe_conn_out;
1325 * Lookup the scheduler, by 'u->sched_name'
1327 if (strcmp(u->sched_name, "none")) {
1328 sched = ip_vs_scheduler_get(u->sched_name);
1330 pr_info("Scheduler module ip_vs_%s not found\n",
1337 if (u->pe_name && *u->pe_name) {
1338 pe = ip_vs_pe_getbyname(u->pe_name);
1340 pr_info("persistence engine module ip_vs_pe_%s "
1341 "not found\n", u->pe_name);
1348 #ifdef CONFIG_IP_VS_IPV6
1349 if (u->af == AF_INET6) {
1350 __u32 plen = (__force __u32) u->netmask;
1352 if (plen < 1 || plen > 128) {
1359 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1360 if (sched != old_sched) {
1362 ip_vs_unbind_scheduler(svc, old_sched);
1363 RCU_INIT_POINTER(svc->scheduler, NULL);
1364 /* Wait all svc->sched_data users */
1367 /* Bind the new scheduler */
1369 ret = ip_vs_bind_scheduler(svc, sched);
1371 ip_vs_scheduler_put(sched);
1378 * Set the flags and timeout value
1380 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1381 svc->timeout = u->timeout * HZ;
1382 svc->netmask = u->netmask;
1384 old_pe = rcu_dereference_protected(svc->pe, 1);
1386 rcu_assign_pointer(svc->pe, pe);
1387 /* check for optional methods in new pe */
1388 new_pe_conn_out = (pe && pe->conn_out) ? true : false;
1389 old_pe_conn_out = (old_pe && old_pe->conn_out) ? true : false;
1390 if (new_pe_conn_out && !old_pe_conn_out)
1391 atomic_inc(&svc->ipvs->conn_out_counter);
1392 if (old_pe_conn_out && !new_pe_conn_out)
1393 atomic_dec(&svc->ipvs->conn_out_counter);
1397 ip_vs_scheduler_put(old_sched);
1398 ip_vs_pe_put(old_pe);
1403 * Delete a service from the service list
1404 * - The service must be unlinked, unlocked and not referenced!
1405 * - We are called under _bh lock
1407 static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1409 struct ip_vs_dest *dest, *nxt;
1410 struct ip_vs_scheduler *old_sched;
1411 struct ip_vs_pe *old_pe;
1412 struct netns_ipvs *ipvs = svc->ipvs;
1414 /* Count only IPv4 services for old get/setsockopt interface */
1415 if (svc->af == AF_INET)
1416 ipvs->num_services--;
1418 ip_vs_stop_estimator(svc->ipvs, &svc->stats);
1420 /* Unbind scheduler */
1421 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1422 ip_vs_unbind_scheduler(svc, old_sched);
1423 ip_vs_scheduler_put(old_sched);
1425 /* Unbind persistence engine, keep svc->pe */
1426 old_pe = rcu_dereference_protected(svc->pe, 1);
1427 if (old_pe && old_pe->conn_out)
1428 atomic_dec(&ipvs->conn_out_counter);
1429 ip_vs_pe_put(old_pe);
1432 * Unlink the whole destination list
1434 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1435 __ip_vs_unlink_dest(svc, dest, 0);
1436 __ip_vs_del_dest(svc->ipvs, dest, cleanup);
1440 * Update the virtual service counters
1442 if (svc->port == FTPPORT)
1443 atomic_dec(&ipvs->ftpsvc_counter);
1444 else if (svc->port == 0)
1445 atomic_dec(&ipvs->nullsvc_counter);
1448 * Free the service if nobody refers to it
1450 __ip_vs_svc_put(svc, true);
1452 /* decrease the module use count */
1453 ip_vs_use_count_dec();
1457 * Unlink a service from list and try to delete it if its refcnt reached 0
1459 static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1461 /* Hold svc to avoid double release from dest_trash */
1462 atomic_inc(&svc->refcnt);
1464 * Unhash it from the service table
1466 ip_vs_svc_unhash(svc);
1468 __ip_vs_del_service(svc, cleanup);
1472 * Delete a service from the service list
1474 static int ip_vs_del_service(struct ip_vs_service *svc)
1478 ip_vs_unlink_service(svc, false);
1485 * Flush all the virtual services
1487 static int ip_vs_flush(struct netns_ipvs *ipvs, bool cleanup)
1490 struct ip_vs_service *svc;
1491 struct hlist_node *n;
1494 * Flush the service table hashed by <netns,protocol,addr,port>
1496 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1497 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1499 if (svc->ipvs == ipvs)
1500 ip_vs_unlink_service(svc, cleanup);
1505 * Flush the service table hashed by fwmark
1507 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1508 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1510 if (svc->ipvs == ipvs)
1511 ip_vs_unlink_service(svc, cleanup);
1519 * Delete service by {netns} in the service table.
1520 * Called by __ip_vs_cleanup()
1522 void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs)
1525 /* Check for "full" addressed entries */
1526 mutex_lock(&__ip_vs_mutex);
1527 ip_vs_flush(ipvs, true);
1528 mutex_unlock(&__ip_vs_mutex);
1532 /* Put all references for device (dst_cache) */
1534 ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
1536 struct ip_vs_dest_dst *dest_dst;
1538 spin_lock_bh(&dest->dst_lock);
1539 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1540 if (dest_dst && dest_dst->dst_cache->dev == dev) {
1541 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1543 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1545 refcount_read(&dest->refcnt));
1546 __ip_vs_dst_cache_reset(dest);
1548 spin_unlock_bh(&dest->dst_lock);
1551 /* Netdev event receiver
1552 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
1554 static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
1557 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1558 struct net *net = dev_net(dev);
1559 struct netns_ipvs *ipvs = net_ipvs(net);
1560 struct ip_vs_service *svc;
1561 struct ip_vs_dest *dest;
1564 if (event != NETDEV_DOWN || !ipvs)
1566 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1568 mutex_lock(&__ip_vs_mutex);
1569 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1570 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1571 if (svc->ipvs == ipvs) {
1572 list_for_each_entry(dest, &svc->destinations,
1574 ip_vs_forget_dev(dest, dev);
1579 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1580 if (svc->ipvs == ipvs) {
1581 list_for_each_entry(dest, &svc->destinations,
1583 ip_vs_forget_dev(dest, dev);
1590 spin_lock_bh(&ipvs->dest_trash_lock);
1591 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
1592 ip_vs_forget_dev(dest, dev);
1594 spin_unlock_bh(&ipvs->dest_trash_lock);
1595 mutex_unlock(&__ip_vs_mutex);
1601 * Zero counters in a service or all services
1603 static int ip_vs_zero_service(struct ip_vs_service *svc)
1605 struct ip_vs_dest *dest;
1607 list_for_each_entry(dest, &svc->destinations, n_list) {
1608 ip_vs_zero_stats(&dest->stats);
1610 ip_vs_zero_stats(&svc->stats);
1614 static int ip_vs_zero_all(struct netns_ipvs *ipvs)
1617 struct ip_vs_service *svc;
1619 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1620 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1621 if (svc->ipvs == ipvs)
1622 ip_vs_zero_service(svc);
1626 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1627 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1628 if (svc->ipvs == ipvs)
1629 ip_vs_zero_service(svc);
1633 ip_vs_zero_stats(&ipvs->tot_stats);
1637 #ifdef CONFIG_SYSCTL
1640 static int three = 3;
1643 proc_do_defense_mode(struct ctl_table *table, int write,
1644 void __user *buffer, size_t *lenp, loff_t *ppos)
1646 struct netns_ipvs *ipvs = table->extra2;
1647 int *valp = table->data;
1651 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1652 if (write && (*valp != val)) {
1653 if ((*valp < 0) || (*valp > 3)) {
1654 /* Restore the correct value */
1657 update_defense_level(ipvs);
1664 proc_do_sync_threshold(struct ctl_table *table, int write,
1665 void __user *buffer, size_t *lenp, loff_t *ppos)
1667 int *valp = table->data;
1671 /* backup the value first */
1672 memcpy(val, valp, sizeof(val));
1674 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1675 if (write && (valp[0] < 0 || valp[1] < 0 ||
1676 (valp[0] >= valp[1] && valp[1]))) {
1677 /* Restore the correct value */
1678 memcpy(valp, val, sizeof(val));
1684 proc_do_sync_mode(struct ctl_table *table, int write,
1685 void __user *buffer, size_t *lenp, loff_t *ppos)
1687 int *valp = table->data;
1691 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1692 if (write && (*valp != val)) {
1693 if ((*valp < 0) || (*valp > 1)) {
1694 /* Restore the correct value */
1702 proc_do_sync_ports(struct ctl_table *table, int write,
1703 void __user *buffer, size_t *lenp, loff_t *ppos)
1705 int *valp = table->data;
1709 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1710 if (write && (*valp != val)) {
1711 if (*valp < 1 || !is_power_of_2(*valp)) {
1712 /* Restore the correct value */
1720 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
1721 * Do not change order or insert new entries without
1722 * align with netns init in ip_vs_control_net_init()
1725 static struct ctl_table vs_vars[] = {
1727 .procname = "amemthresh",
1728 .maxlen = sizeof(int),
1730 .proc_handler = proc_dointvec,
1733 .procname = "am_droprate",
1734 .maxlen = sizeof(int),
1736 .proc_handler = proc_dointvec,
1739 .procname = "drop_entry",
1740 .maxlen = sizeof(int),
1742 .proc_handler = proc_do_defense_mode,
1745 .procname = "drop_packet",
1746 .maxlen = sizeof(int),
1748 .proc_handler = proc_do_defense_mode,
1750 #ifdef CONFIG_IP_VS_NFCT
1752 .procname = "conntrack",
1753 .maxlen = sizeof(int),
1755 .proc_handler = &proc_dointvec,
1759 .procname = "secure_tcp",
1760 .maxlen = sizeof(int),
1762 .proc_handler = proc_do_defense_mode,
1765 .procname = "snat_reroute",
1766 .maxlen = sizeof(int),
1768 .proc_handler = &proc_dointvec,
1771 .procname = "sync_version",
1772 .maxlen = sizeof(int),
1774 .proc_handler = proc_do_sync_mode,
1777 .procname = "sync_ports",
1778 .maxlen = sizeof(int),
1780 .proc_handler = proc_do_sync_ports,
1783 .procname = "sync_persist_mode",
1784 .maxlen = sizeof(int),
1786 .proc_handler = proc_dointvec,
1789 .procname = "sync_qlen_max",
1790 .maxlen = sizeof(unsigned long),
1792 .proc_handler = proc_doulongvec_minmax,
1795 .procname = "sync_sock_size",
1796 .maxlen = sizeof(int),
1798 .proc_handler = proc_dointvec,
1801 .procname = "cache_bypass",
1802 .maxlen = sizeof(int),
1804 .proc_handler = proc_dointvec,
1807 .procname = "expire_nodest_conn",
1808 .maxlen = sizeof(int),
1810 .proc_handler = proc_dointvec,
1813 .procname = "sloppy_tcp",
1814 .maxlen = sizeof(int),
1816 .proc_handler = proc_dointvec,
1819 .procname = "sloppy_sctp",
1820 .maxlen = sizeof(int),
1822 .proc_handler = proc_dointvec,
1825 .procname = "expire_quiescent_template",
1826 .maxlen = sizeof(int),
1828 .proc_handler = proc_dointvec,
1831 .procname = "sync_threshold",
1833 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1835 .proc_handler = proc_do_sync_threshold,
1838 .procname = "sync_refresh_period",
1839 .maxlen = sizeof(int),
1841 .proc_handler = proc_dointvec_jiffies,
1844 .procname = "sync_retries",
1845 .maxlen = sizeof(int),
1847 .proc_handler = proc_dointvec_minmax,
1852 .procname = "nat_icmp_send",
1853 .maxlen = sizeof(int),
1855 .proc_handler = proc_dointvec,
1858 .procname = "pmtu_disc",
1859 .maxlen = sizeof(int),
1861 .proc_handler = proc_dointvec,
1864 .procname = "backup_only",
1865 .maxlen = sizeof(int),
1867 .proc_handler = proc_dointvec,
1870 .procname = "conn_reuse_mode",
1871 .maxlen = sizeof(int),
1873 .proc_handler = proc_dointvec,
1876 .procname = "schedule_icmp",
1877 .maxlen = sizeof(int),
1879 .proc_handler = proc_dointvec,
1882 .procname = "ignore_tunneled",
1883 .maxlen = sizeof(int),
1885 .proc_handler = proc_dointvec,
1887 #ifdef CONFIG_IP_VS_DEBUG
1889 .procname = "debug_level",
1890 .data = &sysctl_ip_vs_debug_level,
1891 .maxlen = sizeof(int),
1893 .proc_handler = proc_dointvec,
1901 #ifdef CONFIG_PROC_FS
1904 struct seq_net_private p; /* Do not move this, netns depends upon it*/
1905 struct hlist_head *table;
1910 * Write the contents of the VS rule table to a PROCfs file.
1911 * (It is kept just for backward compatibility)
1913 static inline const char *ip_vs_fwd_name(unsigned int flags)
1915 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1916 case IP_VS_CONN_F_LOCALNODE:
1918 case IP_VS_CONN_F_TUNNEL:
1920 case IP_VS_CONN_F_DROUTE:
1928 /* Get the Nth entry in the two lists */
1929 static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1931 struct net *net = seq_file_net(seq);
1932 struct netns_ipvs *ipvs = net_ipvs(net);
1933 struct ip_vs_iter *iter = seq->private;
1935 struct ip_vs_service *svc;
1937 /* look in hash by protocol */
1938 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1939 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
1940 if ((svc->ipvs == ipvs) && pos-- == 0) {
1941 iter->table = ip_vs_svc_table;
1948 /* keep looking in fwmark */
1949 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1950 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1952 if ((svc->ipvs == ipvs) && pos-- == 0) {
1953 iter->table = ip_vs_svc_fwm_table;
1963 static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1967 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1971 static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1973 struct hlist_node *e;
1974 struct ip_vs_iter *iter;
1975 struct ip_vs_service *svc;
1978 if (v == SEQ_START_TOKEN)
1979 return ip_vs_info_array(seq,0);
1982 iter = seq->private;
1984 if (iter->table == ip_vs_svc_table) {
1985 /* next service in table hashed by protocol */
1986 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1988 return hlist_entry(e, struct ip_vs_service, s_list);
1990 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1991 hlist_for_each_entry_rcu(svc,
1992 &ip_vs_svc_table[iter->bucket],
1998 iter->table = ip_vs_svc_fwm_table;
2003 /* next service in hashed by fwmark */
2004 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
2006 return hlist_entry(e, struct ip_vs_service, f_list);
2009 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
2010 hlist_for_each_entry_rcu(svc,
2011 &ip_vs_svc_fwm_table[iter->bucket],
2019 static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
2026 static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
2028 if (v == SEQ_START_TOKEN) {
2030 "IP Virtual Server version %d.%d.%d (size=%d)\n",
2031 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2033 "Prot LocalAddress:Port Scheduler Flags\n");
2035 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
2037 const struct ip_vs_service *svc = v;
2038 const struct ip_vs_iter *iter = seq->private;
2039 const struct ip_vs_dest *dest;
2040 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
2041 char *sched_name = sched ? sched->name : "none";
2043 if (iter->table == ip_vs_svc_table) {
2044 #ifdef CONFIG_IP_VS_IPV6
2045 if (svc->af == AF_INET6)
2046 seq_printf(seq, "%s [%pI6]:%04X %s ",
2047 ip_vs_proto_name(svc->protocol),
2053 seq_printf(seq, "%s %08X:%04X %s %s ",
2054 ip_vs_proto_name(svc->protocol),
2055 ntohl(svc->addr.ip),
2058 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2060 seq_printf(seq, "FWM %08X %s %s",
2061 svc->fwmark, sched_name,
2062 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2065 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2066 seq_printf(seq, "persistent %d %08X\n",
2068 ntohl(svc->netmask));
2070 seq_putc(seq, '\n');
2072 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
2073 #ifdef CONFIG_IP_VS_IPV6
2074 if (dest->af == AF_INET6)
2077 " %-7s %-6d %-10d %-10d\n",
2080 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2081 atomic_read(&dest->weight),
2082 atomic_read(&dest->activeconns),
2083 atomic_read(&dest->inactconns));
2088 "%-7s %-6d %-10d %-10d\n",
2089 ntohl(dest->addr.ip),
2091 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2092 atomic_read(&dest->weight),
2093 atomic_read(&dest->activeconns),
2094 atomic_read(&dest->inactconns));
2101 static const struct seq_operations ip_vs_info_seq_ops = {
2102 .start = ip_vs_info_seq_start,
2103 .next = ip_vs_info_seq_next,
2104 .stop = ip_vs_info_seq_stop,
2105 .show = ip_vs_info_seq_show,
2108 static int ip_vs_info_open(struct inode *inode, struct file *file)
2110 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
2111 sizeof(struct ip_vs_iter));
2114 static const struct file_operations ip_vs_info_fops = {
2115 .owner = THIS_MODULE,
2116 .open = ip_vs_info_open,
2118 .llseek = seq_lseek,
2119 .release = seq_release_net,
2122 static int ip_vs_stats_show(struct seq_file *seq, void *v)
2124 struct net *net = seq_file_single_net(seq);
2125 struct ip_vs_kstats show;
2127 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2129 " Total Incoming Outgoing Incoming Outgoing\n");
2131 " Conns Packets Packets Bytes Bytes\n");
2133 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2134 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
2135 (unsigned long long)show.conns,
2136 (unsigned long long)show.inpkts,
2137 (unsigned long long)show.outpkts,
2138 (unsigned long long)show.inbytes,
2139 (unsigned long long)show.outbytes);
2141 /* 01234567 01234567 01234567 0123456701234567 0123456701234567*/
2143 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2144 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
2145 (unsigned long long)show.cps,
2146 (unsigned long long)show.inpps,
2147 (unsigned long long)show.outpps,
2148 (unsigned long long)show.inbps,
2149 (unsigned long long)show.outbps);
2154 static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2156 return single_open_net(inode, file, ip_vs_stats_show);
2159 static const struct file_operations ip_vs_stats_fops = {
2160 .owner = THIS_MODULE,
2161 .open = ip_vs_stats_seq_open,
2163 .llseek = seq_lseek,
2164 .release = single_release_net,
2167 static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2169 struct net *net = seq_file_single_net(seq);
2170 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
2171 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
2172 struct ip_vs_kstats kstats;
2175 /* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2177 " Total Incoming Outgoing Incoming Outgoing\n");
2179 "CPU Conns Packets Packets Bytes Bytes\n");
2181 for_each_possible_cpu(i) {
2182 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2184 u64 conns, inpkts, outpkts, inbytes, outbytes;
2187 start = u64_stats_fetch_begin_irq(&u->syncp);
2188 conns = u->cnt.conns;
2189 inpkts = u->cnt.inpkts;
2190 outpkts = u->cnt.outpkts;
2191 inbytes = u->cnt.inbytes;
2192 outbytes = u->cnt.outbytes;
2193 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2195 seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2196 i, (u64)conns, (u64)inpkts,
2197 (u64)outpkts, (u64)inbytes,
2201 ip_vs_copy_stats(&kstats, tot_stats);
2203 seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2204 (unsigned long long)kstats.conns,
2205 (unsigned long long)kstats.inpkts,
2206 (unsigned long long)kstats.outpkts,
2207 (unsigned long long)kstats.inbytes,
2208 (unsigned long long)kstats.outbytes);
2210 /* ... 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2212 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2213 seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
2223 static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2225 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2228 static const struct file_operations ip_vs_stats_percpu_fops = {
2229 .owner = THIS_MODULE,
2230 .open = ip_vs_stats_percpu_seq_open,
2232 .llseek = seq_lseek,
2233 .release = single_release_net,
2238 * Set timeout values for tcp tcpfin udp in the timeout_table.
2240 static int ip_vs_set_timeout(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2242 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2243 struct ip_vs_proto_data *pd;
2246 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2251 #ifdef CONFIG_IP_VS_PROTO_TCP
2252 if (u->tcp_timeout) {
2253 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2254 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
2255 = u->tcp_timeout * HZ;
2258 if (u->tcp_fin_timeout) {
2259 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2260 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
2261 = u->tcp_fin_timeout * HZ;
2265 #ifdef CONFIG_IP_VS_PROTO_UDP
2266 if (u->udp_timeout) {
2267 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2268 pd->timeout_table[IP_VS_UDP_S_NORMAL]
2269 = u->udp_timeout * HZ;
2275 #define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2277 struct ip_vs_svcdest_user {
2278 struct ip_vs_service_user s;
2279 struct ip_vs_dest_user d;
2282 static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2283 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2284 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2285 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2286 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2287 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2288 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2289 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2290 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2291 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2292 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2295 union ip_vs_set_arglen {
2296 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2297 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2298 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2299 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2300 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2301 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2302 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2303 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2304 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2305 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2308 #define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2310 static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2311 struct ip_vs_service_user *usvc_compat)
2313 memset(usvc, 0, sizeof(*usvc));
2316 usvc->protocol = usvc_compat->protocol;
2317 usvc->addr.ip = usvc_compat->addr;
2318 usvc->port = usvc_compat->port;
2319 usvc->fwmark = usvc_compat->fwmark;
2321 /* Deep copy of sched_name is not needed here */
2322 usvc->sched_name = usvc_compat->sched_name;
2324 usvc->flags = usvc_compat->flags;
2325 usvc->timeout = usvc_compat->timeout;
2326 usvc->netmask = usvc_compat->netmask;
2329 static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2330 struct ip_vs_dest_user *udest_compat)
2332 memset(udest, 0, sizeof(*udest));
2334 udest->addr.ip = udest_compat->addr;
2335 udest->port = udest_compat->port;
2336 udest->conn_flags = udest_compat->conn_flags;
2337 udest->weight = udest_compat->weight;
2338 udest->u_threshold = udest_compat->u_threshold;
2339 udest->l_threshold = udest_compat->l_threshold;
2340 udest->af = AF_INET;
2344 do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2346 struct net *net = sock_net(sk);
2348 unsigned char arg[MAX_SET_ARGLEN];
2349 struct ip_vs_service_user *usvc_compat;
2350 struct ip_vs_service_user_kern usvc;
2351 struct ip_vs_service *svc;
2352 struct ip_vs_dest_user *udest_compat;
2353 struct ip_vs_dest_user_kern udest;
2354 struct netns_ipvs *ipvs = net_ipvs(net);
2356 BUILD_BUG_ON(sizeof(arg) > 255);
2357 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2360 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2362 if (len != set_arglen[CMDID(cmd)]) {
2363 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2364 len, set_arglen[CMDID(cmd)]);
2368 if (copy_from_user(arg, user, len) != 0)
2371 /* increase the module use count */
2372 ip_vs_use_count_inc();
2374 /* Handle daemons since they have another lock */
2375 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2376 cmd == IP_VS_SO_SET_STOPDAEMON) {
2377 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2379 if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2380 struct ipvs_sync_daemon_cfg cfg;
2382 memset(&cfg, 0, sizeof(cfg));
2383 strlcpy(cfg.mcast_ifn, dm->mcast_ifn,
2384 sizeof(cfg.mcast_ifn));
2385 cfg.syncid = dm->syncid;
2387 mutex_lock(&ipvs->sync_mutex);
2388 ret = start_sync_thread(ipvs, &cfg, dm->state);
2389 mutex_unlock(&ipvs->sync_mutex);
2392 mutex_lock(&ipvs->sync_mutex);
2393 ret = stop_sync_thread(ipvs, dm->state);
2394 mutex_unlock(&ipvs->sync_mutex);
2399 mutex_lock(&__ip_vs_mutex);
2400 if (cmd == IP_VS_SO_SET_FLUSH) {
2401 /* Flush the virtual service */
2402 ret = ip_vs_flush(ipvs, false);
2404 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2405 /* Set timeout values for (tcp tcpfin udp) */
2406 ret = ip_vs_set_timeout(ipvs, (struct ip_vs_timeout_user *)arg);
2410 usvc_compat = (struct ip_vs_service_user *)arg;
2411 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2413 /* We only use the new structs internally, so copy userspace compat
2414 * structs to extended internal versions */
2415 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2416 ip_vs_copy_udest_compat(&udest, udest_compat);
2418 if (cmd == IP_VS_SO_SET_ZERO) {
2419 /* if no service address is set, zero counters in all */
2420 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2421 ret = ip_vs_zero_all(ipvs);
2426 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2427 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2428 usvc.protocol != IPPROTO_SCTP) {
2429 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2430 usvc.protocol, &usvc.addr.ip,
2431 ntohs(usvc.port), usvc.sched_name);
2436 /* Lookup the exact service by <protocol, addr, port> or fwmark */
2438 if (usvc.fwmark == 0)
2439 svc = __ip_vs_service_find(ipvs, usvc.af, usvc.protocol,
2440 &usvc.addr, usvc.port);
2442 svc = __ip_vs_svc_fwm_find(ipvs, usvc.af, usvc.fwmark);
2445 if (cmd != IP_VS_SO_SET_ADD
2446 && (svc == NULL || svc->protocol != usvc.protocol)) {
2452 case IP_VS_SO_SET_ADD:
2456 ret = ip_vs_add_service(ipvs, &usvc, &svc);
2458 case IP_VS_SO_SET_EDIT:
2459 ret = ip_vs_edit_service(svc, &usvc);
2461 case IP_VS_SO_SET_DEL:
2462 ret = ip_vs_del_service(svc);
2466 case IP_VS_SO_SET_ZERO:
2467 ret = ip_vs_zero_service(svc);
2469 case IP_VS_SO_SET_ADDDEST:
2470 ret = ip_vs_add_dest(svc, &udest);
2472 case IP_VS_SO_SET_EDITDEST:
2473 ret = ip_vs_edit_dest(svc, &udest);
2475 case IP_VS_SO_SET_DELDEST:
2476 ret = ip_vs_del_dest(svc, &udest);
2483 mutex_unlock(&__ip_vs_mutex);
2485 /* decrease the module use count */
2486 ip_vs_use_count_dec();
2493 ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2495 struct ip_vs_scheduler *sched;
2496 struct ip_vs_kstats kstats;
2499 sched = rcu_dereference_protected(src->scheduler, 1);
2500 sched_name = sched ? sched->name : "none";
2501 dst->protocol = src->protocol;
2502 dst->addr = src->addr.ip;
2503 dst->port = src->port;
2504 dst->fwmark = src->fwmark;
2505 strlcpy(dst->sched_name, sched_name, sizeof(dst->sched_name));
2506 dst->flags = src->flags;
2507 dst->timeout = src->timeout / HZ;
2508 dst->netmask = src->netmask;
2509 dst->num_dests = src->num_dests;
2510 ip_vs_copy_stats(&kstats, &src->stats);
2511 ip_vs_export_stats_user(&dst->stats, &kstats);
2515 __ip_vs_get_service_entries(struct netns_ipvs *ipvs,
2516 const struct ip_vs_get_services *get,
2517 struct ip_vs_get_services __user *uptr)
2520 struct ip_vs_service *svc;
2521 struct ip_vs_service_entry entry;
2524 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2525 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2526 /* Only expose IPv4 entries to old interface */
2527 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2530 if (count >= get->num_services)
2532 memset(&entry, 0, sizeof(entry));
2533 ip_vs_copy_service(&entry, svc);
2534 if (copy_to_user(&uptr->entrytable[count],
2535 &entry, sizeof(entry))) {
2543 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2544 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2545 /* Only expose IPv4 entries to old interface */
2546 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2549 if (count >= get->num_services)
2551 memset(&entry, 0, sizeof(entry));
2552 ip_vs_copy_service(&entry, svc);
2553 if (copy_to_user(&uptr->entrytable[count],
2554 &entry, sizeof(entry))) {
2566 __ip_vs_get_dest_entries(struct netns_ipvs *ipvs, const struct ip_vs_get_dests *get,
2567 struct ip_vs_get_dests __user *uptr)
2569 struct ip_vs_service *svc;
2570 union nf_inet_addr addr = { .ip = get->addr };
2575 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, get->fwmark);
2577 svc = __ip_vs_service_find(ipvs, AF_INET, get->protocol, &addr,
2583 struct ip_vs_dest *dest;
2584 struct ip_vs_dest_entry entry;
2585 struct ip_vs_kstats kstats;
2587 memset(&entry, 0, sizeof(entry));
2588 list_for_each_entry(dest, &svc->destinations, n_list) {
2589 if (count >= get->num_dests)
2592 /* Cannot expose heterogeneous members via sockopt
2595 if (dest->af != svc->af)
2598 entry.addr = dest->addr.ip;
2599 entry.port = dest->port;
2600 entry.conn_flags = atomic_read(&dest->conn_flags);
2601 entry.weight = atomic_read(&dest->weight);
2602 entry.u_threshold = dest->u_threshold;
2603 entry.l_threshold = dest->l_threshold;
2604 entry.activeconns = atomic_read(&dest->activeconns);
2605 entry.inactconns = atomic_read(&dest->inactconns);
2606 entry.persistconns = atomic_read(&dest->persistconns);
2607 ip_vs_copy_stats(&kstats, &dest->stats);
2608 ip_vs_export_stats_user(&entry.stats, &kstats);
2609 if (copy_to_user(&uptr->entrytable[count],
2610 &entry, sizeof(entry))) {
2622 __ip_vs_get_timeouts(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2624 #if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2625 struct ip_vs_proto_data *pd;
2628 memset(u, 0, sizeof (*u));
2630 #ifdef CONFIG_IP_VS_PROTO_TCP
2631 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2632 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2633 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2635 #ifdef CONFIG_IP_VS_PROTO_UDP
2636 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2638 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2642 static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2643 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2644 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2645 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2646 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2647 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2648 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2649 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2652 union ip_vs_get_arglen {
2653 char field_IP_VS_SO_GET_VERSION[64];
2654 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2655 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2656 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2657 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2658 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2659 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
2662 #define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2665 do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2667 unsigned char arg[MAX_GET_ARGLEN];
2669 unsigned int copylen;
2670 struct net *net = sock_net(sk);
2671 struct netns_ipvs *ipvs = net_ipvs(net);
2674 BUILD_BUG_ON(sizeof(arg) > 255);
2675 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2678 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2681 copylen = get_arglen[CMDID(cmd)];
2682 if (*len < (int) copylen) {
2683 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
2687 if (copy_from_user(arg, user, copylen) != 0)
2690 * Handle daemons first since it has its own locking
2692 if (cmd == IP_VS_SO_GET_DAEMON) {
2693 struct ip_vs_daemon_user d[2];
2695 memset(&d, 0, sizeof(d));
2696 mutex_lock(&ipvs->sync_mutex);
2697 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2698 d[0].state = IP_VS_STATE_MASTER;
2699 strlcpy(d[0].mcast_ifn, ipvs->mcfg.mcast_ifn,
2700 sizeof(d[0].mcast_ifn));
2701 d[0].syncid = ipvs->mcfg.syncid;
2703 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2704 d[1].state = IP_VS_STATE_BACKUP;
2705 strlcpy(d[1].mcast_ifn, ipvs->bcfg.mcast_ifn,
2706 sizeof(d[1].mcast_ifn));
2707 d[1].syncid = ipvs->bcfg.syncid;
2709 if (copy_to_user(user, &d, sizeof(d)) != 0)
2711 mutex_unlock(&ipvs->sync_mutex);
2715 mutex_lock(&__ip_vs_mutex);
2717 case IP_VS_SO_GET_VERSION:
2721 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2722 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2723 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2727 *len = strlen(buf)+1;
2731 case IP_VS_SO_GET_INFO:
2733 struct ip_vs_getinfo info;
2734 info.version = IP_VS_VERSION_CODE;
2735 info.size = ip_vs_conn_tab_size;
2736 info.num_services = ipvs->num_services;
2737 if (copy_to_user(user, &info, sizeof(info)) != 0)
2742 case IP_VS_SO_GET_SERVICES:
2744 struct ip_vs_get_services *get;
2747 get = (struct ip_vs_get_services *)arg;
2748 size = sizeof(*get) +
2749 sizeof(struct ip_vs_service_entry) * get->num_services;
2751 pr_err("length: %u != %u\n", *len, size);
2755 ret = __ip_vs_get_service_entries(ipvs, get, user);
2759 case IP_VS_SO_GET_SERVICE:
2761 struct ip_vs_service_entry *entry;
2762 struct ip_vs_service *svc;
2763 union nf_inet_addr addr;
2765 entry = (struct ip_vs_service_entry *)arg;
2766 addr.ip = entry->addr;
2769 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, entry->fwmark);
2771 svc = __ip_vs_service_find(ipvs, AF_INET,
2772 entry->protocol, &addr,
2776 ip_vs_copy_service(entry, svc);
2777 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2784 case IP_VS_SO_GET_DESTS:
2786 struct ip_vs_get_dests *get;
2789 get = (struct ip_vs_get_dests *)arg;
2790 size = sizeof(*get) +
2791 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2793 pr_err("length: %u != %u\n", *len, size);
2797 ret = __ip_vs_get_dest_entries(ipvs, get, user);
2801 case IP_VS_SO_GET_TIMEOUT:
2803 struct ip_vs_timeout_user t;
2805 __ip_vs_get_timeouts(ipvs, &t);
2806 if (copy_to_user(user, &t, sizeof(t)) != 0)
2816 mutex_unlock(&__ip_vs_mutex);
2821 static struct nf_sockopt_ops ip_vs_sockopts = {
2823 .set_optmin = IP_VS_BASE_CTL,
2824 .set_optmax = IP_VS_SO_SET_MAX+1,
2825 .set = do_ip_vs_set_ctl,
2826 .get_optmin = IP_VS_BASE_CTL,
2827 .get_optmax = IP_VS_SO_GET_MAX+1,
2828 .get = do_ip_vs_get_ctl,
2829 .owner = THIS_MODULE,
2833 * Generic Netlink interface
2836 /* IPVS genetlink family */
2837 static struct genl_family ip_vs_genl_family;
2839 /* Policy used for first-level command attributes */
2840 static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2841 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2842 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2843 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2844 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2845 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2846 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2849 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2850 static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2851 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2852 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2853 .len = IP_VS_IFNAME_MAXLEN },
2854 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2855 [IPVS_DAEMON_ATTR_SYNC_MAXLEN] = { .type = NLA_U16 },
2856 [IPVS_DAEMON_ATTR_MCAST_GROUP] = { .type = NLA_U32 },
2857 [IPVS_DAEMON_ATTR_MCAST_GROUP6] = { .len = sizeof(struct in6_addr) },
2858 [IPVS_DAEMON_ATTR_MCAST_PORT] = { .type = NLA_U16 },
2859 [IPVS_DAEMON_ATTR_MCAST_TTL] = { .type = NLA_U8 },
2862 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2863 static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2864 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2865 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2866 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2867 .len = sizeof(union nf_inet_addr) },
2868 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2869 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2870 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2871 .len = IP_VS_SCHEDNAME_MAXLEN },
2872 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2873 .len = IP_VS_PENAME_MAXLEN },
2874 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2875 .len = sizeof(struct ip_vs_flags) },
2876 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2877 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2878 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2881 /* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2882 static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2883 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2884 .len = sizeof(union nf_inet_addr) },
2885 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2886 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2887 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2888 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2889 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2890 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2891 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2892 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2893 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2894 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
2897 static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2898 struct ip_vs_kstats *kstats)
2900 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2905 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
2906 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
2907 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
2908 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2909 IPVS_STATS_ATTR_PAD) ||
2910 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2911 IPVS_STATS_ATTR_PAD) ||
2912 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
2913 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
2914 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
2915 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
2916 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
2917 goto nla_put_failure;
2918 nla_nest_end(skb, nl_stats);
2923 nla_nest_cancel(skb, nl_stats);
2927 static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
2928 struct ip_vs_kstats *kstats)
2930 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2935 if (nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CONNS, kstats->conns,
2936 IPVS_STATS_ATTR_PAD) ||
2937 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts,
2938 IPVS_STATS_ATTR_PAD) ||
2939 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts,
2940 IPVS_STATS_ATTR_PAD) ||
2941 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2942 IPVS_STATS_ATTR_PAD) ||
2943 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2944 IPVS_STATS_ATTR_PAD) ||
2945 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CPS, kstats->cps,
2946 IPVS_STATS_ATTR_PAD) ||
2947 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps,
2948 IPVS_STATS_ATTR_PAD) ||
2949 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps,
2950 IPVS_STATS_ATTR_PAD) ||
2951 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps,
2952 IPVS_STATS_ATTR_PAD) ||
2953 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps,
2954 IPVS_STATS_ATTR_PAD))
2955 goto nla_put_failure;
2956 nla_nest_end(skb, nl_stats);
2961 nla_nest_cancel(skb, nl_stats);
2965 static int ip_vs_genl_fill_service(struct sk_buff *skb,
2966 struct ip_vs_service *svc)
2968 struct ip_vs_scheduler *sched;
2969 struct ip_vs_pe *pe;
2970 struct nlattr *nl_service;
2971 struct ip_vs_flags flags = { .flags = svc->flags,
2973 struct ip_vs_kstats kstats;
2976 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2980 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2981 goto nla_put_failure;
2983 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2984 goto nla_put_failure;
2986 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2987 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
2988 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
2989 goto nla_put_failure;
2992 sched = rcu_dereference_protected(svc->scheduler, 1);
2993 sched_name = sched ? sched->name : "none";
2994 pe = rcu_dereference_protected(svc->pe, 1);
2995 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched_name) ||
2996 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
2997 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2998 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
2999 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
3000 goto nla_put_failure;
3001 ip_vs_copy_stats(&kstats, &svc->stats);
3002 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
3003 goto nla_put_failure;
3004 if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
3005 goto nla_put_failure;
3007 nla_nest_end(skb, nl_service);
3012 nla_nest_cancel(skb, nl_service);
3016 static int ip_vs_genl_dump_service(struct sk_buff *skb,
3017 struct ip_vs_service *svc,
3018 struct netlink_callback *cb)
3022 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3023 &ip_vs_genl_family, NLM_F_MULTI,
3024 IPVS_CMD_NEW_SERVICE);
3028 if (ip_vs_genl_fill_service(skb, svc) < 0)
3029 goto nla_put_failure;
3031 genlmsg_end(skb, hdr);
3035 genlmsg_cancel(skb, hdr);
3039 static int ip_vs_genl_dump_services(struct sk_buff *skb,
3040 struct netlink_callback *cb)
3043 int start = cb->args[0];
3044 struct ip_vs_service *svc;
3045 struct net *net = sock_net(skb->sk);
3046 struct netns_ipvs *ipvs = net_ipvs(net);
3048 mutex_lock(&__ip_vs_mutex);
3049 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3050 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
3051 if (++idx <= start || (svc->ipvs != ipvs))
3053 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3055 goto nla_put_failure;
3060 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3061 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
3062 if (++idx <= start || (svc->ipvs != ipvs))
3064 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3066 goto nla_put_failure;
3072 mutex_unlock(&__ip_vs_mutex);
3078 static bool ip_vs_is_af_valid(int af)
3082 #ifdef CONFIG_IP_VS_IPV6
3083 if (af == AF_INET6 && ipv6_mod_enabled())
3089 static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs,
3090 struct ip_vs_service_user_kern *usvc,
3091 struct nlattr *nla, int full_entry,
3092 struct ip_vs_service **ret_svc)
3094 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3095 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
3096 struct ip_vs_service *svc;
3098 /* Parse mandatory identifying service fields first */
3100 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla,
3101 ip_vs_svc_policy, NULL))
3104 nla_af = attrs[IPVS_SVC_ATTR_AF];
3105 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3106 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3107 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3108 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3110 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3113 memset(usvc, 0, sizeof(*usvc));
3115 usvc->af = nla_get_u16(nla_af);
3116 if (!ip_vs_is_af_valid(usvc->af))
3117 return -EAFNOSUPPORT;
3120 usvc->protocol = IPPROTO_TCP;
3121 usvc->fwmark = nla_get_u32(nla_fwmark);
3123 usvc->protocol = nla_get_u16(nla_protocol);
3124 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
3125 usvc->port = nla_get_be16(nla_port);
3131 svc = __ip_vs_svc_fwm_find(ipvs, usvc->af, usvc->fwmark);
3133 svc = __ip_vs_service_find(ipvs, usvc->af, usvc->protocol,
3134 &usvc->addr, usvc->port);
3138 /* If a full entry was requested, check for the additional fields */
3140 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
3142 struct ip_vs_flags flags;
3144 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
3145 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
3146 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3147 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3148 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3150 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3153 nla_memcpy(&flags, nla_flags, sizeof(flags));
3155 /* prefill flags from service if it already exists */
3157 usvc->flags = svc->flags;
3159 /* set new flags from userland */
3160 usvc->flags = (usvc->flags & ~flags.mask) |
3161 (flags.flags & flags.mask);
3162 usvc->sched_name = nla_data(nla_sched);
3163 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
3164 usvc->timeout = nla_get_u32(nla_timeout);
3165 usvc->netmask = nla_get_be32(nla_netmask);
3171 static struct ip_vs_service *ip_vs_genl_find_service(struct netns_ipvs *ipvs,
3174 struct ip_vs_service_user_kern usvc;
3175 struct ip_vs_service *svc;
3178 ret = ip_vs_genl_parse_service(ipvs, &usvc, nla, 0, &svc);
3179 return ret ? ERR_PTR(ret) : svc;
3182 static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3184 struct nlattr *nl_dest;
3185 struct ip_vs_kstats kstats;
3187 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3191 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
3192 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
3193 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3194 (atomic_read(&dest->conn_flags) &
3195 IP_VS_CONN_F_FWD_MASK)) ||
3196 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3197 atomic_read(&dest->weight)) ||
3198 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3199 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3200 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3201 atomic_read(&dest->activeconns)) ||
3202 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3203 atomic_read(&dest->inactconns)) ||
3204 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
3205 atomic_read(&dest->persistconns)) ||
3206 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
3207 goto nla_put_failure;
3208 ip_vs_copy_stats(&kstats, &dest->stats);
3209 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
3210 goto nla_put_failure;
3211 if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
3212 goto nla_put_failure;
3214 nla_nest_end(skb, nl_dest);
3219 nla_nest_cancel(skb, nl_dest);
3223 static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3224 struct netlink_callback *cb)
3228 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3229 &ip_vs_genl_family, NLM_F_MULTI,
3234 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3235 goto nla_put_failure;
3237 genlmsg_end(skb, hdr);
3241 genlmsg_cancel(skb, hdr);
3245 static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3246 struct netlink_callback *cb)
3249 int start = cb->args[0];
3250 struct ip_vs_service *svc;
3251 struct ip_vs_dest *dest;
3252 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
3253 struct net *net = sock_net(skb->sk);
3254 struct netns_ipvs *ipvs = net_ipvs(net);
3256 mutex_lock(&__ip_vs_mutex);
3258 /* Try to find the service for which to dump destinations */
3259 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, IPVS_CMD_ATTR_MAX,
3260 ip_vs_cmd_policy, NULL))
3264 svc = ip_vs_genl_find_service(ipvs, attrs[IPVS_CMD_ATTR_SERVICE]);
3265 if (IS_ERR_OR_NULL(svc))
3268 /* Dump the destinations */
3269 list_for_each_entry(dest, &svc->destinations, n_list) {
3272 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3274 goto nla_put_failure;
3282 mutex_unlock(&__ip_vs_mutex);
3287 static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
3288 struct nlattr *nla, int full_entry)
3290 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3291 struct nlattr *nla_addr, *nla_port;
3292 struct nlattr *nla_addr_family;
3294 /* Parse mandatory identifying destination fields first */
3296 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla,
3297 ip_vs_dest_policy, NULL))
3300 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3301 nla_port = attrs[IPVS_DEST_ATTR_PORT];
3302 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
3304 if (!(nla_addr && nla_port))
3307 memset(udest, 0, sizeof(*udest));
3309 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
3310 udest->port = nla_get_be16(nla_port);
3312 if (nla_addr_family)
3313 udest->af = nla_get_u16(nla_addr_family);
3317 /* If a full entry was requested, check for the additional fields */
3319 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3322 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3323 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3324 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3325 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3327 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3330 udest->conn_flags = nla_get_u32(nla_fwd)
3331 & IP_VS_CONN_F_FWD_MASK;
3332 udest->weight = nla_get_u32(nla_weight);
3333 udest->u_threshold = nla_get_u32(nla_u_thresh);
3334 udest->l_threshold = nla_get_u32(nla_l_thresh);
3340 static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3341 struct ipvs_sync_daemon_cfg *c)
3343 struct nlattr *nl_daemon;
3345 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3349 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3350 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, c->mcast_ifn) ||
3351 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, c->syncid) ||
3352 nla_put_u16(skb, IPVS_DAEMON_ATTR_SYNC_MAXLEN, c->sync_maxlen) ||
3353 nla_put_u16(skb, IPVS_DAEMON_ATTR_MCAST_PORT, c->mcast_port) ||
3354 nla_put_u8(skb, IPVS_DAEMON_ATTR_MCAST_TTL, c->mcast_ttl))
3355 goto nla_put_failure;
3356 #ifdef CONFIG_IP_VS_IPV6
3357 if (c->mcast_af == AF_INET6) {
3358 if (nla_put_in6_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP6,
3359 &c->mcast_group.in6))
3360 goto nla_put_failure;
3363 if (c->mcast_af == AF_INET &&
3364 nla_put_in_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP,
3366 goto nla_put_failure;
3367 nla_nest_end(skb, nl_daemon);
3372 nla_nest_cancel(skb, nl_daemon);
3376 static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3377 struct ipvs_sync_daemon_cfg *c,
3378 struct netlink_callback *cb)
3381 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3382 &ip_vs_genl_family, NLM_F_MULTI,
3383 IPVS_CMD_NEW_DAEMON);
3387 if (ip_vs_genl_fill_daemon(skb, state, c))
3388 goto nla_put_failure;
3390 genlmsg_end(skb, hdr);
3394 genlmsg_cancel(skb, hdr);
3398 static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3399 struct netlink_callback *cb)
3401 struct net *net = sock_net(skb->sk);
3402 struct netns_ipvs *ipvs = net_ipvs(net);
3404 mutex_lock(&ipvs->sync_mutex);
3405 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
3406 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
3407 &ipvs->mcfg, cb) < 0)
3408 goto nla_put_failure;
3413 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3414 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3415 &ipvs->bcfg, cb) < 0)
3416 goto nla_put_failure;
3422 mutex_unlock(&ipvs->sync_mutex);
3427 static int ip_vs_genl_new_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3429 struct ipvs_sync_daemon_cfg c;
3433 memset(&c, 0, sizeof(c));
3434 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3435 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3436 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3438 strlcpy(c.mcast_ifn, nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3439 sizeof(c.mcast_ifn));
3440 c.syncid = nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]);
3442 a = attrs[IPVS_DAEMON_ATTR_SYNC_MAXLEN];
3444 c.sync_maxlen = nla_get_u16(a);
3446 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP];
3448 c.mcast_af = AF_INET;
3449 c.mcast_group.ip = nla_get_in_addr(a);
3450 if (!ipv4_is_multicast(c.mcast_group.ip))
3453 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP6];
3455 #ifdef CONFIG_IP_VS_IPV6
3458 c.mcast_af = AF_INET6;
3459 c.mcast_group.in6 = nla_get_in6_addr(a);
3460 addr_type = ipv6_addr_type(&c.mcast_group.in6);
3461 if (!(addr_type & IPV6_ADDR_MULTICAST))
3464 return -EAFNOSUPPORT;
3469 a = attrs[IPVS_DAEMON_ATTR_MCAST_PORT];
3471 c.mcast_port = nla_get_u16(a);
3473 a = attrs[IPVS_DAEMON_ATTR_MCAST_TTL];
3475 c.mcast_ttl = nla_get_u8(a);
3477 /* The synchronization protocol is incompatible with mixed family
3480 if (ipvs->mixed_address_family_dests > 0)
3484 mutex_lock(&ipvs->sync_mutex);
3485 ret = start_sync_thread(ipvs, &c,
3486 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3487 mutex_unlock(&ipvs->sync_mutex);
3492 static int ip_vs_genl_del_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3496 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3499 mutex_lock(&ipvs->sync_mutex);
3500 ret = stop_sync_thread(ipvs,
3501 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3502 mutex_unlock(&ipvs->sync_mutex);
3506 static int ip_vs_genl_set_config(struct netns_ipvs *ipvs, struct nlattr **attrs)
3508 struct ip_vs_timeout_user t;
3510 __ip_vs_get_timeouts(ipvs, &t);
3512 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3513 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3515 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3517 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3519 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3520 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3522 return ip_vs_set_timeout(ipvs, &t);
3525 static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
3527 int ret = -EINVAL, cmd;
3528 struct net *net = sock_net(skb->sk);
3529 struct netns_ipvs *ipvs = net_ipvs(net);
3531 cmd = info->genlhdr->cmd;
3533 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
3534 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3536 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3537 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3538 info->attrs[IPVS_CMD_ATTR_DAEMON],
3539 ip_vs_daemon_policy, info->extack))
3542 if (cmd == IPVS_CMD_NEW_DAEMON)
3543 ret = ip_vs_genl_new_daemon(ipvs, daemon_attrs);
3545 ret = ip_vs_genl_del_daemon(ipvs, daemon_attrs);
3552 static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3554 struct ip_vs_service *svc = NULL;
3555 struct ip_vs_service_user_kern usvc;
3556 struct ip_vs_dest_user_kern udest;
3558 int need_full_svc = 0, need_full_dest = 0;
3559 struct net *net = sock_net(skb->sk);
3560 struct netns_ipvs *ipvs = net_ipvs(net);
3562 cmd = info->genlhdr->cmd;
3564 mutex_lock(&__ip_vs_mutex);
3566 if (cmd == IPVS_CMD_FLUSH) {
3567 ret = ip_vs_flush(ipvs, false);
3569 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3570 ret = ip_vs_genl_set_config(ipvs, info->attrs);
3572 } else if (cmd == IPVS_CMD_ZERO &&
3573 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3574 ret = ip_vs_zero_all(ipvs);
3578 /* All following commands require a service argument, so check if we
3579 * received a valid one. We need a full service specification when
3580 * adding / editing a service. Only identifying members otherwise. */
3581 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3584 ret = ip_vs_genl_parse_service(ipvs, &usvc,
3585 info->attrs[IPVS_CMD_ATTR_SERVICE],
3586 need_full_svc, &svc);
3590 /* Unless we're adding a new service, the service must already exist */
3591 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3596 /* Destination commands require a valid destination argument. For
3597 * adding / editing a destination, we need a full destination
3599 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3600 cmd == IPVS_CMD_DEL_DEST) {
3601 if (cmd != IPVS_CMD_DEL_DEST)
3604 ret = ip_vs_genl_parse_dest(&udest,
3605 info->attrs[IPVS_CMD_ATTR_DEST],
3610 /* Old protocols did not allow the user to specify address
3611 * family, so we set it to zero instead. We also didn't
3612 * allow heterogeneous pools in the old code, so it's safe
3613 * to assume that this will have the same address family as
3619 if (!ip_vs_is_af_valid(udest.af)) {
3620 ret = -EAFNOSUPPORT;
3624 if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
3625 /* The synchronization protocol is incompatible
3626 * with mixed family services
3628 if (ipvs->sync_state) {
3633 /* Which connection types do we support? */
3634 switch (udest.conn_flags) {
3635 case IP_VS_CONN_F_TUNNEL:
3636 /* We are able to forward this */
3646 case IPVS_CMD_NEW_SERVICE:
3648 ret = ip_vs_add_service(ipvs, &usvc, &svc);
3652 case IPVS_CMD_SET_SERVICE:
3653 ret = ip_vs_edit_service(svc, &usvc);
3655 case IPVS_CMD_DEL_SERVICE:
3656 ret = ip_vs_del_service(svc);
3657 /* do not use svc, it can be freed */
3659 case IPVS_CMD_NEW_DEST:
3660 ret = ip_vs_add_dest(svc, &udest);
3662 case IPVS_CMD_SET_DEST:
3663 ret = ip_vs_edit_dest(svc, &udest);
3665 case IPVS_CMD_DEL_DEST:
3666 ret = ip_vs_del_dest(svc, &udest);
3669 ret = ip_vs_zero_service(svc);
3676 mutex_unlock(&__ip_vs_mutex);
3681 static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3683 struct sk_buff *msg;
3685 int ret, cmd, reply_cmd;
3686 struct net *net = sock_net(skb->sk);
3687 struct netns_ipvs *ipvs = net_ipvs(net);
3689 cmd = info->genlhdr->cmd;
3691 if (cmd == IPVS_CMD_GET_SERVICE)
3692 reply_cmd = IPVS_CMD_NEW_SERVICE;
3693 else if (cmd == IPVS_CMD_GET_INFO)
3694 reply_cmd = IPVS_CMD_SET_INFO;
3695 else if (cmd == IPVS_CMD_GET_CONFIG)
3696 reply_cmd = IPVS_CMD_SET_CONFIG;
3698 pr_err("unknown Generic Netlink command\n");
3702 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3706 mutex_lock(&__ip_vs_mutex);
3708 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3710 goto nla_put_failure;
3713 case IPVS_CMD_GET_SERVICE:
3715 struct ip_vs_service *svc;
3717 svc = ip_vs_genl_find_service(ipvs,
3718 info->attrs[IPVS_CMD_ATTR_SERVICE]);
3723 ret = ip_vs_genl_fill_service(msg, svc);
3725 goto nla_put_failure;
3734 case IPVS_CMD_GET_CONFIG:
3736 struct ip_vs_timeout_user t;
3738 __ip_vs_get_timeouts(ipvs, &t);
3739 #ifdef CONFIG_IP_VS_PROTO_TCP
3740 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3742 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3744 goto nla_put_failure;
3746 #ifdef CONFIG_IP_VS_PROTO_UDP
3747 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3748 goto nla_put_failure;
3754 case IPVS_CMD_GET_INFO:
3755 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3756 IP_VS_VERSION_CODE) ||
3757 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3758 ip_vs_conn_tab_size))
3759 goto nla_put_failure;
3763 genlmsg_end(msg, reply);
3764 ret = genlmsg_reply(msg, info);
3768 pr_err("not enough space in Netlink message\n");
3774 mutex_unlock(&__ip_vs_mutex);
3780 static const struct genl_ops ip_vs_genl_ops[] = {
3782 .cmd = IPVS_CMD_NEW_SERVICE,
3783 .flags = GENL_ADMIN_PERM,
3784 .policy = ip_vs_cmd_policy,
3785 .doit = ip_vs_genl_set_cmd,
3788 .cmd = IPVS_CMD_SET_SERVICE,
3789 .flags = GENL_ADMIN_PERM,
3790 .policy = ip_vs_cmd_policy,
3791 .doit = ip_vs_genl_set_cmd,
3794 .cmd = IPVS_CMD_DEL_SERVICE,
3795 .flags = GENL_ADMIN_PERM,
3796 .policy = ip_vs_cmd_policy,
3797 .doit = ip_vs_genl_set_cmd,
3800 .cmd = IPVS_CMD_GET_SERVICE,
3801 .flags = GENL_ADMIN_PERM,
3802 .doit = ip_vs_genl_get_cmd,
3803 .dumpit = ip_vs_genl_dump_services,
3804 .policy = ip_vs_cmd_policy,
3807 .cmd = IPVS_CMD_NEW_DEST,
3808 .flags = GENL_ADMIN_PERM,
3809 .policy = ip_vs_cmd_policy,
3810 .doit = ip_vs_genl_set_cmd,
3813 .cmd = IPVS_CMD_SET_DEST,
3814 .flags = GENL_ADMIN_PERM,
3815 .policy = ip_vs_cmd_policy,
3816 .doit = ip_vs_genl_set_cmd,
3819 .cmd = IPVS_CMD_DEL_DEST,
3820 .flags = GENL_ADMIN_PERM,
3821 .policy = ip_vs_cmd_policy,
3822 .doit = ip_vs_genl_set_cmd,
3825 .cmd = IPVS_CMD_GET_DEST,
3826 .flags = GENL_ADMIN_PERM,
3827 .policy = ip_vs_cmd_policy,
3828 .dumpit = ip_vs_genl_dump_dests,
3831 .cmd = IPVS_CMD_NEW_DAEMON,
3832 .flags = GENL_ADMIN_PERM,
3833 .policy = ip_vs_cmd_policy,
3834 .doit = ip_vs_genl_set_daemon,
3837 .cmd = IPVS_CMD_DEL_DAEMON,
3838 .flags = GENL_ADMIN_PERM,
3839 .policy = ip_vs_cmd_policy,
3840 .doit = ip_vs_genl_set_daemon,
3843 .cmd = IPVS_CMD_GET_DAEMON,
3844 .flags = GENL_ADMIN_PERM,
3845 .dumpit = ip_vs_genl_dump_daemons,
3848 .cmd = IPVS_CMD_SET_CONFIG,
3849 .flags = GENL_ADMIN_PERM,
3850 .policy = ip_vs_cmd_policy,
3851 .doit = ip_vs_genl_set_cmd,
3854 .cmd = IPVS_CMD_GET_CONFIG,
3855 .flags = GENL_ADMIN_PERM,
3856 .doit = ip_vs_genl_get_cmd,
3859 .cmd = IPVS_CMD_GET_INFO,
3860 .flags = GENL_ADMIN_PERM,
3861 .doit = ip_vs_genl_get_cmd,
3864 .cmd = IPVS_CMD_ZERO,
3865 .flags = GENL_ADMIN_PERM,
3866 .policy = ip_vs_cmd_policy,
3867 .doit = ip_vs_genl_set_cmd,
3870 .cmd = IPVS_CMD_FLUSH,
3871 .flags = GENL_ADMIN_PERM,
3872 .doit = ip_vs_genl_set_cmd,
3876 static struct genl_family ip_vs_genl_family __ro_after_init = {
3878 .name = IPVS_GENL_NAME,
3879 .version = IPVS_GENL_VERSION,
3880 .maxattr = IPVS_CMD_ATTR_MAX,
3881 .netnsok = true, /* Make ipvsadm to work on netns */
3882 .module = THIS_MODULE,
3883 .ops = ip_vs_genl_ops,
3884 .n_ops = ARRAY_SIZE(ip_vs_genl_ops),
3887 static int __init ip_vs_genl_register(void)
3889 return genl_register_family(&ip_vs_genl_family);
3892 static void ip_vs_genl_unregister(void)
3894 genl_unregister_family(&ip_vs_genl_family);
3897 /* End of Generic Netlink interface definitions */
3900 * per netns intit/exit func.
3902 #ifdef CONFIG_SYSCTL
3903 static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs)
3905 struct net *net = ipvs->net;
3907 struct ctl_table *tbl;
3909 atomic_set(&ipvs->dropentry, 0);
3910 spin_lock_init(&ipvs->dropentry_lock);
3911 spin_lock_init(&ipvs->droppacket_lock);
3912 spin_lock_init(&ipvs->securetcp_lock);
3914 if (!net_eq(net, &init_net)) {
3915 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3919 /* Don't export sysctls to unprivileged users */
3920 if (net->user_ns != &init_user_ns)
3921 tbl[0].procname = NULL;
3924 /* Initialize sysctl defaults */
3925 for (idx = 0; idx < ARRAY_SIZE(vs_vars); idx++) {
3926 if (tbl[idx].proc_handler == proc_do_defense_mode)
3927 tbl[idx].extra2 = ipvs;
3930 ipvs->sysctl_amemthresh = 1024;
3931 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3932 ipvs->sysctl_am_droprate = 10;
3933 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3934 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3935 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3936 #ifdef CONFIG_IP_VS_NFCT
3937 tbl[idx++].data = &ipvs->sysctl_conntrack;
3939 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3940 ipvs->sysctl_snat_reroute = 1;
3941 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3942 ipvs->sysctl_sync_ver = 1;
3943 tbl[idx++].data = &ipvs->sysctl_sync_ver;
3944 ipvs->sysctl_sync_ports = 1;
3945 tbl[idx++].data = &ipvs->sysctl_sync_ports;
3946 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
3947 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3948 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3949 ipvs->sysctl_sync_sock_size = 0;
3950 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
3951 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3952 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
3953 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3954 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
3955 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
3956 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3957 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
3958 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3959 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
3960 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3961 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3962 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3963 tbl[idx++].data = &ipvs->sysctl_sync_retries;
3964 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3965 ipvs->sysctl_pmtu_disc = 1;
3966 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
3967 tbl[idx++].data = &ipvs->sysctl_backup_only;
3968 ipvs->sysctl_conn_reuse_mode = 1;
3969 tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
3970 tbl[idx++].data = &ipvs->sysctl_schedule_icmp;
3971 tbl[idx++].data = &ipvs->sysctl_ignore_tunneled;
3973 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
3974 if (ipvs->sysctl_hdr == NULL) {
3975 if (!net_eq(net, &init_net))
3979 ip_vs_start_estimator(ipvs, &ipvs->tot_stats);
3980 ipvs->sysctl_tbl = tbl;
3981 /* Schedule defense work */
3982 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3983 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
3988 static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs)
3990 struct net *net = ipvs->net;
3992 cancel_delayed_work_sync(&ipvs->defense_work);
3993 cancel_work_sync(&ipvs->defense_work.work);
3994 unregister_net_sysctl_table(ipvs->sysctl_hdr);
3995 ip_vs_stop_estimator(ipvs, &ipvs->tot_stats);
3997 if (!net_eq(net, &init_net))
3998 kfree(ipvs->sysctl_tbl);
4003 static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs) { return 0; }
4004 static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs) { }
4008 static struct notifier_block ip_vs_dst_notifier = {
4009 .notifier_call = ip_vs_dst_event,
4012 int __net_init ip_vs_control_net_init(struct netns_ipvs *ipvs)
4016 /* Initialize rs_table */
4017 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
4018 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
4020 INIT_LIST_HEAD(&ipvs->dest_trash);
4021 spin_lock_init(&ipvs->dest_trash_lock);
4022 timer_setup(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire, 0);
4023 atomic_set(&ipvs->ftpsvc_counter, 0);
4024 atomic_set(&ipvs->nullsvc_counter, 0);
4025 atomic_set(&ipvs->conn_out_counter, 0);
4028 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
4029 if (!ipvs->tot_stats.cpustats)
4032 for_each_possible_cpu(i) {
4033 struct ip_vs_cpu_stats *ipvs_tot_stats;
4034 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
4035 u64_stats_init(&ipvs_tot_stats->syncp);
4038 spin_lock_init(&ipvs->tot_stats.lock);
4040 proc_create("ip_vs", 0, ipvs->net->proc_net, &ip_vs_info_fops);
4041 proc_create("ip_vs_stats", 0, ipvs->net->proc_net, &ip_vs_stats_fops);
4042 proc_create("ip_vs_stats_percpu", 0, ipvs->net->proc_net,
4043 &ip_vs_stats_percpu_fops);
4045 if (ip_vs_control_net_init_sysctl(ipvs))
4051 free_percpu(ipvs->tot_stats.cpustats);
4055 void __net_exit ip_vs_control_net_cleanup(struct netns_ipvs *ipvs)
4057 ip_vs_trash_cleanup(ipvs);
4058 ip_vs_control_net_cleanup_sysctl(ipvs);
4059 remove_proc_entry("ip_vs_stats_percpu", ipvs->net->proc_net);
4060 remove_proc_entry("ip_vs_stats", ipvs->net->proc_net);
4061 remove_proc_entry("ip_vs", ipvs->net->proc_net);
4062 free_percpu(ipvs->tot_stats.cpustats);
4065 int __init ip_vs_register_nl_ioctl(void)
4069 ret = nf_register_sockopt(&ip_vs_sockopts);
4071 pr_err("cannot register sockopt.\n");
4075 ret = ip_vs_genl_register();
4077 pr_err("cannot register Generic Netlink interface.\n");
4083 nf_unregister_sockopt(&ip_vs_sockopts);
4088 void ip_vs_unregister_nl_ioctl(void)
4090 ip_vs_genl_unregister();
4091 nf_unregister_sockopt(&ip_vs_sockopts);
4094 int __init ip_vs_control_init(void)
4101 /* Initialize svc_table, ip_vs_svc_fwm_table */
4102 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
4103 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
4104 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
4107 smp_wmb(); /* Do we really need it now ? */
4109 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
4118 void ip_vs_control_cleanup(void)
4121 unregister_netdevice_notifier(&ip_vs_dst_notifier);