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21#define KMSG_COMPONENT "IPVS"
22#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/types.h>
27#include <linux/capability.h>
28#include <linux/fs.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>
35
36#include <linux/netfilter.h>
37#include <linux/netfilter_ipv4.h>
38#include <linux/mutex.h>
39
40#include <net/net_namespace.h>
41#include <linux/nsproxy.h>
42#include <net/ip.h>
43#ifdef CONFIG_IP_VS_IPV6
44#include <net/ipv6.h>
45#include <net/ip6_route.h>
46#endif
47#include <net/route.h>
48#include <net/sock.h>
49#include <net/genetlink.h>
50
51#include <linux/uaccess.h>
52
53#include <net/ip_vs.h>
54
55
56static DEFINE_MUTEX(__ip_vs_mutex);
57
58
59
60#ifdef CONFIG_IP_VS_DEBUG
61static int sysctl_ip_vs_debug_level = 0;
62
63int ip_vs_get_debug_level(void)
64{
65 return sysctl_ip_vs_debug_level;
66}
67#endif
68
69
70
71static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup);
72
73
74#ifdef CONFIG_IP_VS_IPV6
75
76static bool __ip_vs_addr_is_local_v6(struct net *net,
77 const struct in6_addr *addr)
78{
79 struct flowi6 fl6 = {
80 .daddr = *addr,
81 };
82 struct dst_entry *dst = ip6_route_output(net, NULL, &fl6);
83 bool is_local;
84
85 is_local = !dst->error && dst->dev && (dst->dev->flags & IFF_LOOPBACK);
86
87 dst_release(dst);
88 return is_local;
89}
90#endif
91
92#ifdef CONFIG_SYSCTL
93
94
95
96
97static void update_defense_level(struct netns_ipvs *ipvs)
98{
99 struct sysinfo i;
100 static int old_secure_tcp = 0;
101 int availmem;
102 int nomem;
103 int to_change = -1;
104
105
106 si_meminfo(&i);
107 availmem = i.freeram + i.bufferram;
108
109
110
111
112
113 nomem = (availmem < ipvs->sysctl_amemthresh);
114
115 local_bh_disable();
116
117
118 spin_lock(&ipvs->dropentry_lock);
119 switch (ipvs->sysctl_drop_entry) {
120 case 0:
121 atomic_set(&ipvs->dropentry, 0);
122 break;
123 case 1:
124 if (nomem) {
125 atomic_set(&ipvs->dropentry, 1);
126 ipvs->sysctl_drop_entry = 2;
127 } else {
128 atomic_set(&ipvs->dropentry, 0);
129 }
130 break;
131 case 2:
132 if (nomem) {
133 atomic_set(&ipvs->dropentry, 1);
134 } else {
135 atomic_set(&ipvs->dropentry, 0);
136 ipvs->sysctl_drop_entry = 1;
137 };
138 break;
139 case 3:
140 atomic_set(&ipvs->dropentry, 1);
141 break;
142 }
143 spin_unlock(&ipvs->dropentry_lock);
144
145
146 spin_lock(&ipvs->droppacket_lock);
147 switch (ipvs->sysctl_drop_packet) {
148 case 0:
149 ipvs->drop_rate = 0;
150 break;
151 case 1:
152 if (nomem) {
153 ipvs->drop_rate = ipvs->drop_counter
154 = ipvs->sysctl_amemthresh /
155 (ipvs->sysctl_amemthresh-availmem);
156 ipvs->sysctl_drop_packet = 2;
157 } else {
158 ipvs->drop_rate = 0;
159 }
160 break;
161 case 2:
162 if (nomem) {
163 ipvs->drop_rate = ipvs->drop_counter
164 = ipvs->sysctl_amemthresh /
165 (ipvs->sysctl_amemthresh-availmem);
166 } else {
167 ipvs->drop_rate = 0;
168 ipvs->sysctl_drop_packet = 1;
169 }
170 break;
171 case 3:
172 ipvs->drop_rate = ipvs->sysctl_am_droprate;
173 break;
174 }
175 spin_unlock(&ipvs->droppacket_lock);
176
177
178 spin_lock(&ipvs->securetcp_lock);
179 switch (ipvs->sysctl_secure_tcp) {
180 case 0:
181 if (old_secure_tcp >= 2)
182 to_change = 0;
183 break;
184 case 1:
185 if (nomem) {
186 if (old_secure_tcp < 2)
187 to_change = 1;
188 ipvs->sysctl_secure_tcp = 2;
189 } else {
190 if (old_secure_tcp >= 2)
191 to_change = 0;
192 }
193 break;
194 case 2:
195 if (nomem) {
196 if (old_secure_tcp < 2)
197 to_change = 1;
198 } else {
199 if (old_secure_tcp >= 2)
200 to_change = 0;
201 ipvs->sysctl_secure_tcp = 1;
202 }
203 break;
204 case 3:
205 if (old_secure_tcp < 2)
206 to_change = 1;
207 break;
208 }
209 old_secure_tcp = ipvs->sysctl_secure_tcp;
210 if (to_change >= 0)
211 ip_vs_protocol_timeout_change(ipvs,
212 ipvs->sysctl_secure_tcp > 1);
213 spin_unlock(&ipvs->securetcp_lock);
214
215 local_bh_enable();
216}
217
218
219
220
221
222#define DEFENSE_TIMER_PERIOD 1*HZ
223
224static void defense_work_handler(struct work_struct *work)
225{
226 struct netns_ipvs *ipvs =
227 container_of(work, struct netns_ipvs, defense_work.work);
228
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);
233}
234#endif
235
236int
237ip_vs_use_count_inc(void)
238{
239 return try_module_get(THIS_MODULE);
240}
241
242void
243ip_vs_use_count_dec(void)
244{
245 module_put(THIS_MODULE);
246}
247
248
249
250
251
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)
255
256
257static struct hlist_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
258
259static struct hlist_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
260
261
262
263
264
265static inline unsigned int
266ip_vs_svc_hashkey(struct netns_ipvs *ipvs, int af, unsigned int proto,
267 const union nf_inet_addr *addr, __be16 port)
268{
269 register unsigned int porth = ntohs(port);
270 __be32 addr_fold = addr->ip;
271 __u32 ahash;
272
273#ifdef CONFIG_IP_VS_IPV6
274 if (af == AF_INET6)
275 addr_fold = addr->ip6[0]^addr->ip6[1]^
276 addr->ip6[2]^addr->ip6[3];
277#endif
278 ahash = ntohl(addr_fold);
279 ahash ^= ((size_t) ipvs >> 8);
280
281 return (proto ^ ahash ^ (porth >> IP_VS_SVC_TAB_BITS) ^ porth) &
282 IP_VS_SVC_TAB_MASK;
283}
284
285
286
287
288static inline unsigned int ip_vs_svc_fwm_hashkey(struct netns_ipvs *ipvs, __u32 fwmark)
289{
290 return (((size_t)ipvs>>8) ^ fwmark) & IP_VS_SVC_TAB_MASK;
291}
292
293
294
295
296
297
298static int ip_vs_svc_hash(struct ip_vs_service *svc)
299{
300 unsigned int hash;
301
302 if (svc->flags & IP_VS_SVC_F_HASHED) {
303 pr_err("%s(): request for already hashed, called from %pS\n",
304 __func__, __builtin_return_address(0));
305 return 0;
306 }
307
308 if (svc->fwmark == 0) {
309
310
311
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]);
315 } else {
316
317
318
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]);
321 }
322
323 svc->flags |= IP_VS_SVC_F_HASHED;
324
325 atomic_inc(&svc->refcnt);
326 return 1;
327}
328
329
330
331
332
333
334static int ip_vs_svc_unhash(struct ip_vs_service *svc)
335{
336 if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
337 pr_err("%s(): request for unhash flagged, called from %pS\n",
338 __func__, __builtin_return_address(0));
339 return 0;
340 }
341
342 if (svc->fwmark == 0) {
343
344 hlist_del_rcu(&svc->s_list);
345 } else {
346
347 hlist_del_rcu(&svc->f_list);
348 }
349
350 svc->flags &= ~IP_VS_SVC_F_HASHED;
351 atomic_dec(&svc->refcnt);
352 return 1;
353}
354
355
356
357
358
359static 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)
362{
363 unsigned int hash;
364 struct ip_vs_service *svc;
365
366
367 hash = ip_vs_svc_hashkey(ipvs, af, protocol, vaddr, vport);
368
369 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[hash], s_list) {
370 if ((svc->af == af)
371 && ip_vs_addr_equal(af, &svc->addr, vaddr)
372 && (svc->port == vport)
373 && (svc->protocol == protocol)
374 && (svc->ipvs == ipvs)) {
375
376 return svc;
377 }
378 }
379
380 return NULL;
381}
382
383
384
385
386
387static inline struct ip_vs_service *
388__ip_vs_svc_fwm_find(struct netns_ipvs *ipvs, int af, __u32 fwmark)
389{
390 unsigned int hash;
391 struct ip_vs_service *svc;
392
393
394 hash = ip_vs_svc_fwm_hashkey(ipvs, fwmark);
395
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)) {
399
400 return svc;
401 }
402 }
403
404 return NULL;
405}
406
407
408struct ip_vs_service *
409ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol,
410 const union nf_inet_addr *vaddr, __be16 vport)
411{
412 struct ip_vs_service *svc;
413
414
415
416
417 if (fwmark) {
418 svc = __ip_vs_svc_fwm_find(ipvs, af, fwmark);
419 if (svc)
420 goto out;
421 }
422
423
424
425
426
427 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, vport);
428
429 if (!svc && protocol == IPPROTO_TCP &&
430 atomic_read(&ipvs->ftpsvc_counter) &&
431 (vport == FTPDATA || ntohs(vport) >= inet_prot_sock(ipvs->net))) {
432
433
434
435
436 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, FTPPORT);
437 }
438
439 if (svc == NULL
440 && atomic_read(&ipvs->nullsvc_counter)) {
441
442
443
444 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, 0);
445 }
446
447 out:
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");
452
453 return svc;
454}
455
456
457static inline void
458__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
459{
460 atomic_inc(&svc->refcnt);
461 rcu_assign_pointer(dest->svc, svc);
462}
463
464static void ip_vs_service_free(struct ip_vs_service *svc)
465{
466 free_percpu(svc->stats.cpustats);
467 kfree(svc);
468}
469
470static void ip_vs_service_rcu_free(struct rcu_head *head)
471{
472 struct ip_vs_service *svc;
473
474 svc = container_of(head, struct ip_vs_service, rcu_head);
475 ip_vs_service_free(svc);
476}
477
478static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
479{
480 if (atomic_dec_and_test(&svc->refcnt)) {
481 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
482 svc->fwmark,
483 IP_VS_DBG_ADDR(svc->af, &svc->addr),
484 ntohs(svc->port));
485 if (do_delay)
486 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
487 else
488 ip_vs_service_free(svc);
489 }
490}
491
492
493
494
495
496static inline unsigned int ip_vs_rs_hashkey(int af,
497 const union nf_inet_addr *addr,
498 __be16 port)
499{
500 register unsigned int porth = ntohs(port);
501 __be32 addr_fold = addr->ip;
502
503#ifdef CONFIG_IP_VS_IPV6
504 if (af == AF_INET6)
505 addr_fold = addr->ip6[0]^addr->ip6[1]^
506 addr->ip6[2]^addr->ip6[3];
507#endif
508
509 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
510 & IP_VS_RTAB_MASK;
511}
512
513
514static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
515{
516 unsigned int hash;
517
518 if (dest->in_rs_table)
519 return;
520
521
522
523
524
525 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
526
527 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
528 dest->in_rs_table = 1;
529}
530
531
532static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
533{
534
535
536
537 if (dest->in_rs_table) {
538 hlist_del_rcu(&dest->d_list);
539 dest->in_rs_table = 0;
540 }
541}
542
543
544bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
545 const union nf_inet_addr *daddr, __be16 dport)
546{
547 unsigned int hash;
548 struct ip_vs_dest *dest;
549
550
551 hash = ip_vs_rs_hashkey(af, daddr, dport);
552
553 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
554 if (dest->port == dport &&
555 dest->af == af &&
556 ip_vs_addr_equal(af, &dest->addr, daddr) &&
557 (dest->protocol == protocol || dest->vfwmark)) {
558
559 return true;
560 }
561 }
562
563 return false;
564}
565
566
567
568
569
570
571
572struct ip_vs_dest *ip_vs_find_real_service(struct netns_ipvs *ipvs, int af,
573 __u16 protocol,
574 const union nf_inet_addr *daddr,
575 __be16 dport)
576{
577 unsigned int hash;
578 struct ip_vs_dest *dest;
579
580
581 hash = ip_vs_rs_hashkey(af, daddr, dport);
582
583 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
584 if (dest->port == dport &&
585 dest->af == af &&
586 ip_vs_addr_equal(af, &dest->addr, daddr) &&
587 (dest->protocol == protocol || dest->vfwmark)) {
588
589 return dest;
590 }
591 }
592
593 return NULL;
594}
595
596
597
598
599static struct ip_vs_dest *
600ip_vs_lookup_dest(struct ip_vs_service *svc, int dest_af,
601 const union nf_inet_addr *daddr, __be16 dport)
602{
603 struct ip_vs_dest *dest;
604
605
606
607
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)) {
612
613 return dest;
614 }
615 }
616
617 return NULL;
618}
619
620
621
622
623
624
625
626
627
628struct ip_vs_dest *ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af,
629 const union nf_inet_addr *daddr,
630 __be16 dport,
631 const union nf_inet_addr *vaddr,
632 __be16 vport, __u16 protocol, __u32 fwmark,
633 __u32 flags)
634{
635 struct ip_vs_dest *dest;
636 struct ip_vs_service *svc;
637 __be16 port = dport;
638
639 svc = ip_vs_service_find(ipvs, svc_af, fwmark, protocol, vaddr, vport);
640 if (!svc)
641 return NULL;
642 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
643 port = 0;
644 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port);
645 if (!dest)
646 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port ^ dport);
647 return dest;
648}
649
650void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
651{
652 struct ip_vs_dest_dst *dest_dst = container_of(head,
653 struct ip_vs_dest_dst,
654 rcu_head);
655
656 dst_release(dest_dst->dst_cache);
657 kfree(dest_dst);
658}
659
660
661static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
662{
663 struct ip_vs_dest_dst *old;
664
665 old = rcu_dereference_protected(dest->dest_dst, 1);
666 if (old) {
667 RCU_INIT_POINTER(dest->dest_dst, NULL);
668 call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
669 }
670}
671
672
673
674
675
676
677
678
679
680
681
682static struct ip_vs_dest *
683ip_vs_trash_get_dest(struct ip_vs_service *svc, int dest_af,
684 const union nf_inet_addr *daddr, __be16 dport)
685{
686 struct ip_vs_dest *dest;
687 struct netns_ipvs *ipvs = svc->ipvs;
688
689
690
691
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, "
695 "dest->refcnt=%d\n",
696 dest->vfwmark,
697 IP_VS_DBG_ADDR(dest->af, &dest->addr),
698 ntohs(dest->port),
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 &&
705 (svc->fwmark ||
706 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
707 dest->vport == svc->port))) {
708
709 list_del(&dest->t_list);
710 goto out;
711 }
712 }
713
714 dest = NULL;
715
716out:
717 spin_unlock_bh(&ipvs->dest_trash_lock);
718
719 return dest;
720}
721
722static void ip_vs_dest_free(struct ip_vs_dest *dest)
723{
724 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
725
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);
730}
731
732
733
734
735
736
737
738
739
740
741static void ip_vs_trash_cleanup(struct netns_ipvs *ipvs)
742{
743 struct ip_vs_dest *dest, *nxt;
744
745 del_timer_sync(&ipvs->dest_trash_timer);
746
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);
750 }
751}
752
753static void
754ip_vs_copy_stats(struct ip_vs_kstats *dst, struct ip_vs_stats *src)
755{
756#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->kstats.c - src->kstats0.c
757
758 spin_lock_bh(&src->lock);
759
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);
765
766 ip_vs_read_estimator(dst, src);
767
768 spin_unlock_bh(&src->lock);
769}
770
771static void
772ip_vs_export_stats_user(struct ip_vs_stats_user *dst, struct ip_vs_kstats *src)
773{
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;
784}
785
786static void
787ip_vs_zero_stats(struct ip_vs_stats *stats)
788{
789 spin_lock_bh(&stats->lock);
790
791
792
793#define IP_VS_ZERO_STATS_COUNTER(c) stats->kstats0.c = stats->kstats.c
794
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);
800
801 ip_vs_zero_estimator(stats);
802
803 spin_unlock_bh(&stats->lock);
804}
805
806
807
808
809static void
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)
812{
813 struct netns_ipvs *ipvs = svc->ipvs;
814 struct ip_vs_service *old_svc;
815 struct ip_vs_scheduler *sched;
816 int conn_flags;
817
818
819 BUG_ON(!add && udest->af != dest->af);
820
821 if (add && udest->af != svc->af)
822 ipvs->mixed_address_family_dests++;
823
824
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;
828
829
830 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
831 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
832 } else {
833
834
835
836
837 ip_vs_rs_hash(ipvs, dest);
838 }
839 atomic_set(&dest->conn_flags, conn_flags);
840
841
842 old_svc = rcu_dereference_protected(dest->svc, 1);
843 if (!old_svc) {
844 __ip_vs_bind_svc(dest, svc);
845 } else {
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);
850 }
851 }
852
853
854 dest->flags |= IP_VS_DEST_F_AVAILABLE;
855
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;
860
861 dest->af = udest->af;
862
863 spin_lock_bh(&dest->dst_lock);
864 __ip_vs_dst_cache_reset(dest);
865 spin_unlock_bh(&dest->dst_lock);
866
867 if (add) {
868 ip_vs_start_estimator(svc->ipvs, &dest->stats);
869 list_add_rcu(&dest->n_list, &svc->destinations);
870 svc->num_dests++;
871 sched = rcu_dereference_protected(svc->scheduler, 1);
872 if (sched && sched->add_dest)
873 sched->add_dest(svc, dest);
874 } else {
875 sched = rcu_dereference_protected(svc->scheduler, 1);
876 if (sched && sched->upd_dest)
877 sched->upd_dest(svc, dest);
878 }
879}
880
881
882
883
884
885static int
886ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
887 struct ip_vs_dest **dest_p)
888{
889 struct ip_vs_dest *dest;
890 unsigned int atype, i;
891
892 EnterFunction(2);
893
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))
900 return -EINVAL;
901 } else
902#endif
903 {
904 atype = inet_addr_type(svc->ipvs->net, udest->addr.ip);
905 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
906 return -EINVAL;
907 }
908
909 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
910 if (dest == NULL)
911 return -ENOMEM;
912
913 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
914 if (!dest->stats.cpustats)
915 goto err_alloc;
916
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);
921 }
922
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;
930
931 atomic_set(&dest->activeconns, 0);
932 atomic_set(&dest->inactconns, 0);
933 atomic_set(&dest->persistconns, 0);
934 refcount_set(&dest->refcnt, 1);
935
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);
940
941 *dest_p = dest;
942
943 LeaveFunction(2);
944 return 0;
945
946err_alloc:
947 kfree(dest);
948 return -ENOMEM;
949}
950
951
952
953
954
955static int
956ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
957{
958 struct ip_vs_dest *dest;
959 union nf_inet_addr daddr;
960 __be16 dport = udest->port;
961 int ret;
962
963 EnterFunction(2);
964
965 if (udest->weight < 0) {
966 pr_err("%s(): server weight less than zero\n", __func__);
967 return -ERANGE;
968 }
969
970 if (udest->l_threshold > udest->u_threshold) {
971 pr_err("%s(): lower threshold is higher than upper threshold\n",
972 __func__);
973 return -ERANGE;
974 }
975
976 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
977
978
979 rcu_read_lock();
980 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
981 rcu_read_unlock();
982
983 if (dest != NULL) {
984 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
985 return -EEXIST;
986 }
987
988
989
990
991
992 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
993
994 if (dest != NULL) {
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),
999 dest->vfwmark,
1000 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
1001 ntohs(dest->vport));
1002
1003 __ip_vs_update_dest(svc, dest, udest, 1);
1004 ret = 0;
1005 } else {
1006
1007
1008
1009 ret = ip_vs_new_dest(svc, udest, &dest);
1010 }
1011 LeaveFunction(2);
1012
1013 return ret;
1014}
1015
1016
1017
1018
1019
1020static int
1021ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1022{
1023 struct ip_vs_dest *dest;
1024 union nf_inet_addr daddr;
1025 __be16 dport = udest->port;
1026
1027 EnterFunction(2);
1028
1029 if (udest->weight < 0) {
1030 pr_err("%s(): server weight less than zero\n", __func__);
1031 return -ERANGE;
1032 }
1033
1034 if (udest->l_threshold > udest->u_threshold) {
1035 pr_err("%s(): lower threshold is higher than upper threshold\n",
1036 __func__);
1037 return -ERANGE;
1038 }
1039
1040 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
1041
1042
1043 rcu_read_lock();
1044 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
1045 rcu_read_unlock();
1046
1047 if (dest == NULL) {
1048 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1049 return -ENOENT;
1050 }
1051
1052 __ip_vs_update_dest(svc, dest, udest, 0);
1053 LeaveFunction(2);
1054
1055 return 0;
1056}
1057
1058
1059
1060
1061static void __ip_vs_del_dest(struct netns_ipvs *ipvs, struct ip_vs_dest *dest,
1062 bool cleanup)
1063{
1064 ip_vs_stop_estimator(ipvs, &dest->stats);
1065
1066
1067
1068
1069 ip_vs_rs_unhash(dest);
1070
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
1079 list_add(&dest->t_list, &ipvs->dest_trash);
1080 dest->idle_start = 0;
1081 spin_unlock_bh(&ipvs->dest_trash_lock);
1082}
1083
1084
1085
1086
1087
1088static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1089 struct ip_vs_dest *dest,
1090 int svcupd)
1091{
1092 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1093
1094
1095
1096
1097 list_del_rcu(&dest->n_list);
1098 svc->num_dests--;
1099
1100 if (dest->af != svc->af)
1101 svc->ipvs->mixed_address_family_dests--;
1102
1103 if (svcupd) {
1104 struct ip_vs_scheduler *sched;
1105
1106 sched = rcu_dereference_protected(svc->scheduler, 1);
1107 if (sched && sched->del_dest)
1108 sched->del_dest(svc, dest);
1109 }
1110}
1111
1112
1113
1114
1115
1116static int
1117ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1118{
1119 struct ip_vs_dest *dest;
1120 __be16 dport = udest->port;
1121
1122 EnterFunction(2);
1123
1124
1125 rcu_read_lock();
1126 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
1127 rcu_read_unlock();
1128
1129 if (dest == NULL) {
1130 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1131 return -ENOENT;
1132 }
1133
1134
1135
1136
1137 __ip_vs_unlink_dest(svc, dest, 1);
1138
1139
1140
1141
1142 __ip_vs_del_dest(svc->ipvs, dest, false);
1143
1144 LeaveFunction(2);
1145
1146 return 0;
1147}
1148
1149static void ip_vs_dest_trash_expire(struct timer_list *t)
1150{
1151 struct netns_ipvs *ipvs = from_timer(ipvs, t, dest_trash_timer);
1152 struct ip_vs_dest *dest, *next;
1153 unsigned long now = jiffies;
1154
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)
1158 continue;
1159 if (dest->idle_start) {
1160 if (time_before(now, dest->idle_start +
1161 IP_VS_DEST_TRASH_PERIOD))
1162 continue;
1163 } else {
1164 dest->idle_start = max(1UL, now);
1165 continue;
1166 }
1167 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1168 dest->vfwmark,
1169 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1170 ntohs(dest->port));
1171 list_del(&dest->t_list);
1172 ip_vs_dest_free(dest);
1173 }
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);
1178}
1179
1180
1181
1182
1183static int
1184ip_vs_add_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *u,
1185 struct ip_vs_service **svc_p)
1186{
1187 int ret = 0, i;
1188 struct ip_vs_scheduler *sched = NULL;
1189 struct ip_vs_pe *pe = NULL;
1190 struct ip_vs_service *svc = NULL;
1191
1192
1193 ip_vs_use_count_inc();
1194
1195
1196 if (strcmp(u->sched_name, "none")) {
1197 sched = ip_vs_scheduler_get(u->sched_name);
1198 if (!sched) {
1199 pr_info("Scheduler module ip_vs_%s not found\n",
1200 u->sched_name);
1201 ret = -ENOENT;
1202 goto out_err;
1203 }
1204 }
1205
1206 if (u->pe_name && *u->pe_name) {
1207 pe = ip_vs_pe_getbyname(u->pe_name);
1208 if (pe == NULL) {
1209 pr_info("persistence engine module ip_vs_pe_%s "
1210 "not found\n", u->pe_name);
1211 ret = -ENOENT;
1212 goto out_err;
1213 }
1214 }
1215
1216#ifdef CONFIG_IP_VS_IPV6
1217 if (u->af == AF_INET6) {
1218 __u32 plen = (__force __u32) u->netmask;
1219
1220 if (plen < 1 || plen > 128) {
1221 ret = -EINVAL;
1222 goto out_err;
1223 }
1224 }
1225#endif
1226
1227 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1228 if (svc == NULL) {
1229 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1230 ret = -ENOMEM;
1231 goto out_err;
1232 }
1233 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
1234 if (!svc->stats.cpustats) {
1235 ret = -ENOMEM;
1236 goto out_err;
1237 }
1238
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);
1243 }
1244
1245
1246
1247 atomic_set(&svc->refcnt, 0);
1248
1249 svc->af = u->af;
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;
1257 svc->ipvs = ipvs;
1258
1259 INIT_LIST_HEAD(&svc->destinations);
1260 spin_lock_init(&svc->sched_lock);
1261 spin_lock_init(&svc->stats.lock);
1262
1263
1264 if (sched) {
1265 ret = ip_vs_bind_scheduler(svc, sched);
1266 if (ret)
1267 goto out_err;
1268 sched = NULL;
1269 }
1270
1271
1272 RCU_INIT_POINTER(svc->pe, pe);
1273 pe = NULL;
1274
1275
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);
1282
1283 ip_vs_start_estimator(ipvs, &svc->stats);
1284
1285
1286 if (svc->af == AF_INET)
1287 ipvs->num_services++;
1288
1289
1290 ip_vs_svc_hash(svc);
1291
1292 *svc_p = svc;
1293
1294 ipvs->enable = 1;
1295 return 0;
1296
1297
1298 out_err:
1299 if (svc != NULL) {
1300 ip_vs_unbind_scheduler(svc, sched);
1301 ip_vs_service_free(svc);
1302 }
1303 ip_vs_scheduler_put(sched);
1304 ip_vs_pe_put(pe);
1305
1306
1307 ip_vs_use_count_dec();
1308
1309 return ret;
1310}
1311
1312
1313
1314
1315
1316static int
1317ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1318{
1319 struct ip_vs_scheduler *sched = NULL, *old_sched;
1320 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1321 int ret = 0;
1322 bool new_pe_conn_out, old_pe_conn_out;
1323
1324
1325
1326
1327 if (strcmp(u->sched_name, "none")) {
1328 sched = ip_vs_scheduler_get(u->sched_name);
1329 if (!sched) {
1330 pr_info("Scheduler module ip_vs_%s not found\n",
1331 u->sched_name);
1332 return -ENOENT;
1333 }
1334 }
1335 old_sched = sched;
1336
1337 if (u->pe_name && *u->pe_name) {
1338 pe = ip_vs_pe_getbyname(u->pe_name);
1339 if (pe == NULL) {
1340 pr_info("persistence engine module ip_vs_pe_%s "
1341 "not found\n", u->pe_name);
1342 ret = -ENOENT;
1343 goto out;
1344 }
1345 old_pe = pe;
1346 }
1347
1348#ifdef CONFIG_IP_VS_IPV6
1349 if (u->af == AF_INET6) {
1350 __u32 plen = (__force __u32) u->netmask;
1351
1352 if (plen < 1 || plen > 128) {
1353 ret = -EINVAL;
1354 goto out;
1355 }
1356 }
1357#endif
1358
1359 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1360 if (sched != old_sched) {
1361 if (old_sched) {
1362 ip_vs_unbind_scheduler(svc, old_sched);
1363 RCU_INIT_POINTER(svc->scheduler, NULL);
1364
1365 synchronize_rcu();
1366 }
1367
1368 if (sched) {
1369 ret = ip_vs_bind_scheduler(svc, sched);
1370 if (ret) {
1371 ip_vs_scheduler_put(sched);
1372 goto out;
1373 }
1374 }
1375 }
1376
1377
1378
1379
1380 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1381 svc->timeout = u->timeout * HZ;
1382 svc->netmask = u->netmask;
1383
1384 old_pe = rcu_dereference_protected(svc->pe, 1);
1385 if (pe != old_pe) {
1386 rcu_assign_pointer(svc->pe, pe);
1387
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);
1394 }
1395
1396out:
1397 ip_vs_scheduler_put(old_sched);
1398 ip_vs_pe_put(old_pe);
1399 return ret;
1400}
1401
1402
1403
1404
1405
1406
1407static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1408{
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;
1413
1414
1415 if (svc->af == AF_INET)
1416 ipvs->num_services--;
1417
1418 ip_vs_stop_estimator(svc->ipvs, &svc->stats);
1419
1420
1421 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1422 ip_vs_unbind_scheduler(svc, old_sched);
1423 ip_vs_scheduler_put(old_sched);
1424
1425
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);
1430
1431
1432
1433
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);
1437 }
1438
1439
1440
1441
1442 if (svc->port == FTPPORT)
1443 atomic_dec(&ipvs->ftpsvc_counter);
1444 else if (svc->port == 0)
1445 atomic_dec(&ipvs->nullsvc_counter);
1446
1447
1448
1449
1450 __ip_vs_svc_put(svc, true);
1451
1452
1453 ip_vs_use_count_dec();
1454}
1455
1456
1457
1458
1459static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1460{
1461
1462 atomic_inc(&svc->refcnt);
1463
1464
1465
1466 ip_vs_svc_unhash(svc);
1467
1468 __ip_vs_del_service(svc, cleanup);
1469}
1470
1471
1472
1473
1474static int ip_vs_del_service(struct ip_vs_service *svc)
1475{
1476 if (svc == NULL)
1477 return -EEXIST;
1478 ip_vs_unlink_service(svc, false);
1479
1480 return 0;
1481}
1482
1483
1484
1485
1486
1487static int ip_vs_flush(struct netns_ipvs *ipvs, bool cleanup)
1488{
1489 int idx;
1490 struct ip_vs_service *svc;
1491 struct hlist_node *n;
1492
1493
1494
1495
1496 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1497 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1498 s_list) {
1499 if (svc->ipvs == ipvs)
1500 ip_vs_unlink_service(svc, cleanup);
1501 }
1502 }
1503
1504
1505
1506
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],
1509 f_list) {
1510 if (svc->ipvs == ipvs)
1511 ip_vs_unlink_service(svc, cleanup);
1512 }
1513 }
1514
1515 return 0;
1516}
1517
1518
1519
1520
1521
1522void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs)
1523{
1524 EnterFunction(2);
1525
1526 mutex_lock(&__ip_vs_mutex);
1527 ip_vs_flush(ipvs, true);
1528 mutex_unlock(&__ip_vs_mutex);
1529 LeaveFunction(2);
1530}
1531
1532
1533static inline void
1534ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
1535{
1536 struct ip_vs_dest_dst *dest_dst;
1537
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",
1542 dev->name,
1543 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1544 ntohs(dest->port),
1545 refcount_read(&dest->refcnt));
1546 __ip_vs_dst_cache_reset(dest);
1547 }
1548 spin_unlock_bh(&dest->dst_lock);
1549
1550}
1551
1552
1553
1554static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
1555 void *ptr)
1556{
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;
1562 unsigned int idx;
1563
1564 if (event != NETDEV_DOWN || !ipvs)
1565 return NOTIFY_DONE;
1566 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1567 EnterFunction(2);
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,
1573 n_list) {
1574 ip_vs_forget_dev(dest, dev);
1575 }
1576 }
1577 }
1578
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,
1582 n_list) {
1583 ip_vs_forget_dev(dest, dev);
1584 }
1585 }
1586
1587 }
1588 }
1589
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);
1593 }
1594 spin_unlock_bh(&ipvs->dest_trash_lock);
1595 mutex_unlock(&__ip_vs_mutex);
1596 LeaveFunction(2);
1597 return NOTIFY_DONE;
1598}
1599
1600
1601
1602
1603static int ip_vs_zero_service(struct ip_vs_service *svc)
1604{
1605 struct ip_vs_dest *dest;
1606
1607 list_for_each_entry(dest, &svc->destinations, n_list) {
1608 ip_vs_zero_stats(&dest->stats);
1609 }
1610 ip_vs_zero_stats(&svc->stats);
1611 return 0;
1612}
1613
1614static int ip_vs_zero_all(struct netns_ipvs *ipvs)
1615{
1616 int idx;
1617 struct ip_vs_service *svc;
1618
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);
1623 }
1624 }
1625
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);
1630 }
1631 }
1632
1633 ip_vs_zero_stats(&ipvs->tot_stats);
1634 return 0;
1635}
1636
1637#ifdef CONFIG_SYSCTL
1638
1639static int zero;
1640static int three = 3;
1641
1642static int
1643proc_do_defense_mode(struct ctl_table *table, int write,
1644 void __user *buffer, size_t *lenp, loff_t *ppos)
1645{
1646 struct netns_ipvs *ipvs = table->extra2;
1647 int *valp = table->data;
1648 int val = *valp;
1649 int rc;
1650
1651 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1652 if (write && (*valp != val)) {
1653 if ((*valp < 0) || (*valp > 3)) {
1654
1655 *valp = val;
1656 } else {
1657 update_defense_level(ipvs);
1658 }
1659 }
1660 return rc;
1661}
1662
1663static int
1664proc_do_sync_threshold(struct ctl_table *table, int write,
1665 void __user *buffer, size_t *lenp, loff_t *ppos)
1666{
1667 int *valp = table->data;
1668 int val[2];
1669 int rc;
1670
1671
1672 memcpy(val, valp, sizeof(val));
1673
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
1678 memcpy(valp, val, sizeof(val));
1679 }
1680 return rc;
1681}
1682
1683static int
1684proc_do_sync_mode(struct ctl_table *table, int write,
1685 void __user *buffer, size_t *lenp, loff_t *ppos)
1686{
1687 int *valp = table->data;
1688 int val = *valp;
1689 int rc;
1690
1691 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1692 if (write && (*valp != val)) {
1693 if ((*valp < 0) || (*valp > 1)) {
1694
1695 *valp = val;
1696 }
1697 }
1698 return rc;
1699}
1700
1701static int
1702proc_do_sync_ports(struct ctl_table *table, int write,
1703 void __user *buffer, size_t *lenp, loff_t *ppos)
1704{
1705 int *valp = table->data;
1706 int val = *valp;
1707 int rc;
1708
1709 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1710 if (write && (*valp != val)) {
1711 if (*valp < 1 || !is_power_of_2(*valp)) {
1712
1713 *valp = val;
1714 }
1715 }
1716 return rc;
1717}
1718
1719
1720
1721
1722
1723
1724
1725static struct ctl_table vs_vars[] = {
1726 {
1727 .procname = "amemthresh",
1728 .maxlen = sizeof(int),
1729 .mode = 0644,
1730 .proc_handler = proc_dointvec,
1731 },
1732 {
1733 .procname = "am_droprate",
1734 .maxlen = sizeof(int),
1735 .mode = 0644,
1736 .proc_handler = proc_dointvec,
1737 },
1738 {
1739 .procname = "drop_entry",
1740 .maxlen = sizeof(int),
1741 .mode = 0644,
1742 .proc_handler = proc_do_defense_mode,
1743 },
1744 {
1745 .procname = "drop_packet",
1746 .maxlen = sizeof(int),
1747 .mode = 0644,
1748 .proc_handler = proc_do_defense_mode,
1749 },
1750#ifdef CONFIG_IP_VS_NFCT
1751 {
1752 .procname = "conntrack",
1753 .maxlen = sizeof(int),
1754 .mode = 0644,
1755 .proc_handler = &proc_dointvec,
1756 },
1757#endif
1758 {
1759 .procname = "secure_tcp",
1760 .maxlen = sizeof(int),
1761 .mode = 0644,
1762 .proc_handler = proc_do_defense_mode,
1763 },
1764 {
1765 .procname = "snat_reroute",
1766 .maxlen = sizeof(int),
1767 .mode = 0644,
1768 .proc_handler = &proc_dointvec,
1769 },
1770 {
1771 .procname = "sync_version",
1772 .maxlen = sizeof(int),
1773 .mode = 0644,
1774 .proc_handler = proc_do_sync_mode,
1775 },
1776 {
1777 .procname = "sync_ports",
1778 .maxlen = sizeof(int),
1779 .mode = 0644,
1780 .proc_handler = proc_do_sync_ports,
1781 },
1782 {
1783 .procname = "sync_persist_mode",
1784 .maxlen = sizeof(int),
1785 .mode = 0644,
1786 .proc_handler = proc_dointvec,
1787 },
1788 {
1789 .procname = "sync_qlen_max",
1790 .maxlen = sizeof(unsigned long),
1791 .mode = 0644,
1792 .proc_handler = proc_doulongvec_minmax,
1793 },
1794 {
1795 .procname = "sync_sock_size",
1796 .maxlen = sizeof(int),
1797 .mode = 0644,
1798 .proc_handler = proc_dointvec,
1799 },
1800 {
1801 .procname = "cache_bypass",
1802 .maxlen = sizeof(int),
1803 .mode = 0644,
1804 .proc_handler = proc_dointvec,
1805 },
1806 {
1807 .procname = "expire_nodest_conn",
1808 .maxlen = sizeof(int),
1809 .mode = 0644,
1810 .proc_handler = proc_dointvec,
1811 },
1812 {
1813 .procname = "sloppy_tcp",
1814 .maxlen = sizeof(int),
1815 .mode = 0644,
1816 .proc_handler = proc_dointvec,
1817 },
1818 {
1819 .procname = "sloppy_sctp",
1820 .maxlen = sizeof(int),
1821 .mode = 0644,
1822 .proc_handler = proc_dointvec,
1823 },
1824 {
1825 .procname = "expire_quiescent_template",
1826 .maxlen = sizeof(int),
1827 .mode = 0644,
1828 .proc_handler = proc_dointvec,
1829 },
1830 {
1831 .procname = "sync_threshold",
1832 .maxlen =
1833 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1834 .mode = 0644,
1835 .proc_handler = proc_do_sync_threshold,
1836 },
1837 {
1838 .procname = "sync_refresh_period",
1839 .maxlen = sizeof(int),
1840 .mode = 0644,
1841 .proc_handler = proc_dointvec_jiffies,
1842 },
1843 {
1844 .procname = "sync_retries",
1845 .maxlen = sizeof(int),
1846 .mode = 0644,
1847 .proc_handler = proc_dointvec_minmax,
1848 .extra1 = &zero,
1849 .extra2 = &three,
1850 },
1851 {
1852 .procname = "nat_icmp_send",
1853 .maxlen = sizeof(int),
1854 .mode = 0644,
1855 .proc_handler = proc_dointvec,
1856 },
1857 {
1858 .procname = "pmtu_disc",
1859 .maxlen = sizeof(int),
1860 .mode = 0644,
1861 .proc_handler = proc_dointvec,
1862 },
1863 {
1864 .procname = "backup_only",
1865 .maxlen = sizeof(int),
1866 .mode = 0644,
1867 .proc_handler = proc_dointvec,
1868 },
1869 {
1870 .procname = "conn_reuse_mode",
1871 .maxlen = sizeof(int),
1872 .mode = 0644,
1873 .proc_handler = proc_dointvec,
1874 },
1875 {
1876 .procname = "schedule_icmp",
1877 .maxlen = sizeof(int),
1878 .mode = 0644,
1879 .proc_handler = proc_dointvec,
1880 },
1881 {
1882 .procname = "ignore_tunneled",
1883 .maxlen = sizeof(int),
1884 .mode = 0644,
1885 .proc_handler = proc_dointvec,
1886 },
1887#ifdef CONFIG_IP_VS_DEBUG
1888 {
1889 .procname = "debug_level",
1890 .data = &sysctl_ip_vs_debug_level,
1891 .maxlen = sizeof(int),
1892 .mode = 0644,
1893 .proc_handler = proc_dointvec,
1894 },
1895#endif
1896 { }
1897};
1898
1899#endif
1900
1901#ifdef CONFIG_PROC_FS
1902
1903struct ip_vs_iter {
1904 struct seq_net_private p;
1905 struct hlist_head *table;
1906 int bucket;
1907};
1908
1909
1910
1911
1912
1913static inline const char *ip_vs_fwd_name(unsigned int flags)
1914{
1915 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1916 case IP_VS_CONN_F_LOCALNODE:
1917 return "Local";
1918 case IP_VS_CONN_F_TUNNEL:
1919 return "Tunnel";
1920 case IP_VS_CONN_F_DROUTE:
1921 return "Route";
1922 default:
1923 return "Masq";
1924 }
1925}
1926
1927
1928
1929static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1930{
1931 struct net *net = seq_file_net(seq);
1932 struct netns_ipvs *ipvs = net_ipvs(net);
1933 struct ip_vs_iter *iter = seq->private;
1934 int idx;
1935 struct ip_vs_service *svc;
1936
1937
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;
1942 iter->bucket = idx;
1943 return svc;
1944 }
1945 }
1946 }
1947
1948
1949 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1950 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1951 f_list) {
1952 if ((svc->ipvs == ipvs) && pos-- == 0) {
1953 iter->table = ip_vs_svc_fwm_table;
1954 iter->bucket = idx;
1955 return svc;
1956 }
1957 }
1958 }
1959
1960 return NULL;
1961}
1962
1963static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1964 __acquires(RCU)
1965{
1966 rcu_read_lock();
1967 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1968}
1969
1970
1971static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1972{
1973 struct hlist_node *e;
1974 struct ip_vs_iter *iter;
1975 struct ip_vs_service *svc;
1976
1977 ++*pos;
1978 if (v == SEQ_START_TOKEN)
1979 return ip_vs_info_array(seq,0);
1980
1981 svc = v;
1982 iter = seq->private;
1983
1984 if (iter->table == ip_vs_svc_table) {
1985
1986 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1987 if (e)
1988 return hlist_entry(e, struct ip_vs_service, s_list);
1989
1990 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1991 hlist_for_each_entry_rcu(svc,
1992 &ip_vs_svc_table[iter->bucket],
1993 s_list) {
1994 return svc;
1995 }
1996 }
1997
1998 iter->table = ip_vs_svc_fwm_table;
1999 iter->bucket = -1;
2000 goto scan_fwmark;
2001 }
2002
2003
2004 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
2005 if (e)
2006 return hlist_entry(e, struct ip_vs_service, f_list);
2007
2008 scan_fwmark:
2009 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
2010 hlist_for_each_entry_rcu(svc,
2011 &ip_vs_svc_fwm_table[iter->bucket],
2012 f_list)
2013 return svc;
2014 }
2015
2016 return NULL;
2017}
2018
2019static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
2020 __releases(RCU)
2021{
2022 rcu_read_unlock();
2023}
2024
2025
2026static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
2027{
2028 if (v == SEQ_START_TOKEN) {
2029 seq_printf(seq,
2030 "IP Virtual Server version %d.%d.%d (size=%d)\n",
2031 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2032 seq_puts(seq,
2033 "Prot LocalAddress:Port Scheduler Flags\n");
2034 seq_puts(seq,
2035 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
2036 } else {
2037 struct net *net = seq_file_net(seq);
2038 struct netns_ipvs *ipvs = net_ipvs(net);
2039 const struct ip_vs_service *svc = v;
2040 const struct ip_vs_iter *iter = seq->private;
2041 const struct ip_vs_dest *dest;
2042 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
2043 char *sched_name = sched ? sched->name : "none";
2044
2045 if (svc->ipvs != ipvs)
2046 return 0;
2047 if (iter->table == ip_vs_svc_table) {
2048#ifdef CONFIG_IP_VS_IPV6
2049 if (svc->af == AF_INET6)
2050 seq_printf(seq, "%s [%pI6]:%04X %s ",
2051 ip_vs_proto_name(svc->protocol),
2052 &svc->addr.in6,
2053 ntohs(svc->port),
2054 sched_name);
2055 else
2056#endif
2057 seq_printf(seq, "%s %08X:%04X %s %s ",
2058 ip_vs_proto_name(svc->protocol),
2059 ntohl(svc->addr.ip),
2060 ntohs(svc->port),
2061 sched_name,
2062 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2063 } else {
2064 seq_printf(seq, "FWM %08X %s %s",
2065 svc->fwmark, sched_name,
2066 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2067 }
2068
2069 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2070 seq_printf(seq, "persistent %d %08X\n",
2071 svc->timeout,
2072 ntohl(svc->netmask));
2073 else
2074 seq_putc(seq, '\n');
2075
2076 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
2077#ifdef CONFIG_IP_VS_IPV6
2078 if (dest->af == AF_INET6)
2079 seq_printf(seq,
2080 " -> [%pI6]:%04X"
2081 " %-7s %-6d %-10d %-10d\n",
2082 &dest->addr.in6,
2083 ntohs(dest->port),
2084 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2085 atomic_read(&dest->weight),
2086 atomic_read(&dest->activeconns),
2087 atomic_read(&dest->inactconns));
2088 else
2089#endif
2090 seq_printf(seq,
2091 " -> %08X:%04X "
2092 "%-7s %-6d %-10d %-10d\n",
2093 ntohl(dest->addr.ip),
2094 ntohs(dest->port),
2095 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2096 atomic_read(&dest->weight),
2097 atomic_read(&dest->activeconns),
2098 atomic_read(&dest->inactconns));
2099
2100 }
2101 }
2102 return 0;
2103}
2104
2105static const struct seq_operations ip_vs_info_seq_ops = {
2106 .start = ip_vs_info_seq_start,
2107 .next = ip_vs_info_seq_next,
2108 .stop = ip_vs_info_seq_stop,
2109 .show = ip_vs_info_seq_show,
2110};
2111
2112static int ip_vs_info_open(struct inode *inode, struct file *file)
2113{
2114 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
2115 sizeof(struct ip_vs_iter));
2116}
2117
2118static const struct file_operations ip_vs_info_fops = {
2119 .owner = THIS_MODULE,
2120 .open = ip_vs_info_open,
2121 .read = seq_read,
2122 .llseek = seq_lseek,
2123 .release = seq_release_net,
2124};
2125
2126static int ip_vs_stats_show(struct seq_file *seq, void *v)
2127{
2128 struct net *net = seq_file_single_net(seq);
2129 struct ip_vs_kstats show;
2130
2131
2132 seq_puts(seq,
2133 " Total Incoming Outgoing Incoming Outgoing\n");
2134 seq_puts(seq,
2135 " Conns Packets Packets Bytes Bytes\n");
2136
2137 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2138 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
2139 (unsigned long long)show.conns,
2140 (unsigned long long)show.inpkts,
2141 (unsigned long long)show.outpkts,
2142 (unsigned long long)show.inbytes,
2143 (unsigned long long)show.outbytes);
2144
2145
2146 seq_puts(seq,
2147 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2148 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
2149 (unsigned long long)show.cps,
2150 (unsigned long long)show.inpps,
2151 (unsigned long long)show.outpps,
2152 (unsigned long long)show.inbps,
2153 (unsigned long long)show.outbps);
2154
2155 return 0;
2156}
2157
2158static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2159{
2160 return single_open_net(inode, file, ip_vs_stats_show);
2161}
2162
2163static const struct file_operations ip_vs_stats_fops = {
2164 .owner = THIS_MODULE,
2165 .open = ip_vs_stats_seq_open,
2166 .read = seq_read,
2167 .llseek = seq_lseek,
2168 .release = single_release_net,
2169};
2170
2171static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2172{
2173 struct net *net = seq_file_single_net(seq);
2174 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
2175 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
2176 struct ip_vs_kstats kstats;
2177 int i;
2178
2179
2180 seq_puts(seq,
2181 " Total Incoming Outgoing Incoming Outgoing\n");
2182 seq_puts(seq,
2183 "CPU Conns Packets Packets Bytes Bytes\n");
2184
2185 for_each_possible_cpu(i) {
2186 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2187 unsigned int start;
2188 u64 conns, inpkts, outpkts, inbytes, outbytes;
2189
2190 do {
2191 start = u64_stats_fetch_begin_irq(&u->syncp);
2192 conns = u->cnt.conns;
2193 inpkts = u->cnt.inpkts;
2194 outpkts = u->cnt.outpkts;
2195 inbytes = u->cnt.inbytes;
2196 outbytes = u->cnt.outbytes;
2197 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2198
2199 seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2200 i, (u64)conns, (u64)inpkts,
2201 (u64)outpkts, (u64)inbytes,
2202 (u64)outbytes);
2203 }
2204
2205 ip_vs_copy_stats(&kstats, tot_stats);
2206
2207 seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2208 (unsigned long long)kstats.conns,
2209 (unsigned long long)kstats.inpkts,
2210 (unsigned long long)kstats.outpkts,
2211 (unsigned long long)kstats.inbytes,
2212 (unsigned long long)kstats.outbytes);
2213
2214
2215 seq_puts(seq,
2216 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2217 seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
2218 kstats.cps,
2219 kstats.inpps,
2220 kstats.outpps,
2221 kstats.inbps,
2222 kstats.outbps);
2223
2224 return 0;
2225}
2226
2227static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2228{
2229 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2230}
2231
2232static const struct file_operations ip_vs_stats_percpu_fops = {
2233 .owner = THIS_MODULE,
2234 .open = ip_vs_stats_percpu_seq_open,
2235 .read = seq_read,
2236 .llseek = seq_lseek,
2237 .release = single_release_net,
2238};
2239#endif
2240
2241
2242
2243
2244static int ip_vs_set_timeout(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2245{
2246#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2247 struct ip_vs_proto_data *pd;
2248#endif
2249
2250 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2251 u->tcp_timeout,
2252 u->tcp_fin_timeout,
2253 u->udp_timeout);
2254
2255#ifdef CONFIG_IP_VS_PROTO_TCP
2256 if (u->tcp_timeout) {
2257 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2258 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
2259 = u->tcp_timeout * HZ;
2260 }
2261
2262 if (u->tcp_fin_timeout) {
2263 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2264 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
2265 = u->tcp_fin_timeout * HZ;
2266 }
2267#endif
2268
2269#ifdef CONFIG_IP_VS_PROTO_UDP
2270 if (u->udp_timeout) {
2271 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2272 pd->timeout_table[IP_VS_UDP_S_NORMAL]
2273 = u->udp_timeout * HZ;
2274 }
2275#endif
2276 return 0;
2277}
2278
2279#define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2280
2281struct ip_vs_svcdest_user {
2282 struct ip_vs_service_user s;
2283 struct ip_vs_dest_user d;
2284};
2285
2286static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2287 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2288 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2289 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2290 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2291 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2292 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2293 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2294 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2295 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2296 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2297};
2298
2299union ip_vs_set_arglen {
2300 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2301 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2302 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2303 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2304 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2305 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2306 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2307 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2308 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2309 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2310};
2311
2312#define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2313
2314static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2315 struct ip_vs_service_user *usvc_compat)
2316{
2317 memset(usvc, 0, sizeof(*usvc));
2318
2319 usvc->af = AF_INET;
2320 usvc->protocol = usvc_compat->protocol;
2321 usvc->addr.ip = usvc_compat->addr;
2322 usvc->port = usvc_compat->port;
2323 usvc->fwmark = usvc_compat->fwmark;
2324
2325
2326 usvc->sched_name = usvc_compat->sched_name;
2327
2328 usvc->flags = usvc_compat->flags;
2329 usvc->timeout = usvc_compat->timeout;
2330 usvc->netmask = usvc_compat->netmask;
2331}
2332
2333static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2334 struct ip_vs_dest_user *udest_compat)
2335{
2336 memset(udest, 0, sizeof(*udest));
2337
2338 udest->addr.ip = udest_compat->addr;
2339 udest->port = udest_compat->port;
2340 udest->conn_flags = udest_compat->conn_flags;
2341 udest->weight = udest_compat->weight;
2342 udest->u_threshold = udest_compat->u_threshold;
2343 udest->l_threshold = udest_compat->l_threshold;
2344 udest->af = AF_INET;
2345}
2346
2347static int
2348do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2349{
2350 struct net *net = sock_net(sk);
2351 int ret;
2352 unsigned char arg[MAX_SET_ARGLEN];
2353 struct ip_vs_service_user *usvc_compat;
2354 struct ip_vs_service_user_kern usvc;
2355 struct ip_vs_service *svc;
2356 struct ip_vs_dest_user *udest_compat;
2357 struct ip_vs_dest_user_kern udest;
2358 struct netns_ipvs *ipvs = net_ipvs(net);
2359
2360 BUILD_BUG_ON(sizeof(arg) > 255);
2361 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2362 return -EPERM;
2363
2364 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2365 return -EINVAL;
2366 if (len != set_arglen[CMDID(cmd)]) {
2367 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2368 len, set_arglen[CMDID(cmd)]);
2369 return -EINVAL;
2370 }
2371
2372 if (copy_from_user(arg, user, len) != 0)
2373 return -EFAULT;
2374
2375
2376 ip_vs_use_count_inc();
2377
2378
2379 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2380 cmd == IP_VS_SO_SET_STOPDAEMON) {
2381 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2382
2383 if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2384 struct ipvs_sync_daemon_cfg cfg;
2385
2386 memset(&cfg, 0, sizeof(cfg));
2387 strlcpy(cfg.mcast_ifn, dm->mcast_ifn,
2388 sizeof(cfg.mcast_ifn));
2389 cfg.syncid = dm->syncid;
2390 rtnl_lock();
2391 mutex_lock(&ipvs->sync_mutex);
2392 ret = start_sync_thread(ipvs, &cfg, dm->state);
2393 mutex_unlock(&ipvs->sync_mutex);
2394 rtnl_unlock();
2395 } else {
2396 mutex_lock(&ipvs->sync_mutex);
2397 ret = stop_sync_thread(ipvs, dm->state);
2398 mutex_unlock(&ipvs->sync_mutex);
2399 }
2400 goto out_dec;
2401 }
2402
2403 mutex_lock(&__ip_vs_mutex);
2404 if (cmd == IP_VS_SO_SET_FLUSH) {
2405
2406 ret = ip_vs_flush(ipvs, false);
2407 goto out_unlock;
2408 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2409
2410 ret = ip_vs_set_timeout(ipvs, (struct ip_vs_timeout_user *)arg);
2411 goto out_unlock;
2412 }
2413
2414 usvc_compat = (struct ip_vs_service_user *)arg;
2415 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2416
2417
2418
2419 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2420 ip_vs_copy_udest_compat(&udest, udest_compat);
2421
2422 if (cmd == IP_VS_SO_SET_ZERO) {
2423
2424 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2425 ret = ip_vs_zero_all(ipvs);
2426 goto out_unlock;
2427 }
2428 }
2429
2430
2431 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2432 usvc.protocol != IPPROTO_SCTP) {
2433 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2434 usvc.protocol, &usvc.addr.ip,
2435 ntohs(usvc.port), usvc.sched_name);
2436 ret = -EFAULT;
2437 goto out_unlock;
2438 }
2439
2440
2441 rcu_read_lock();
2442 if (usvc.fwmark == 0)
2443 svc = __ip_vs_service_find(ipvs, usvc.af, usvc.protocol,
2444 &usvc.addr, usvc.port);
2445 else
2446 svc = __ip_vs_svc_fwm_find(ipvs, usvc.af, usvc.fwmark);
2447 rcu_read_unlock();
2448
2449 if (cmd != IP_VS_SO_SET_ADD
2450 && (svc == NULL || svc->protocol != usvc.protocol)) {
2451 ret = -ESRCH;
2452 goto out_unlock;
2453 }
2454
2455 switch (cmd) {
2456 case IP_VS_SO_SET_ADD:
2457 if (svc != NULL)
2458 ret = -EEXIST;
2459 else
2460 ret = ip_vs_add_service(ipvs, &usvc, &svc);
2461 break;
2462 case IP_VS_SO_SET_EDIT:
2463 ret = ip_vs_edit_service(svc, &usvc);
2464 break;
2465 case IP_VS_SO_SET_DEL:
2466 ret = ip_vs_del_service(svc);
2467 if (!ret)
2468 goto out_unlock;
2469 break;
2470 case IP_VS_SO_SET_ZERO:
2471 ret = ip_vs_zero_service(svc);
2472 break;
2473 case IP_VS_SO_SET_ADDDEST:
2474 ret = ip_vs_add_dest(svc, &udest);
2475 break;
2476 case IP_VS_SO_SET_EDITDEST:
2477 ret = ip_vs_edit_dest(svc, &udest);
2478 break;
2479 case IP_VS_SO_SET_DELDEST:
2480 ret = ip_vs_del_dest(svc, &udest);
2481 break;
2482 default:
2483 ret = -EINVAL;
2484 }
2485
2486 out_unlock:
2487 mutex_unlock(&__ip_vs_mutex);
2488 out_dec:
2489
2490 ip_vs_use_count_dec();
2491
2492 return ret;
2493}
2494
2495
2496static void
2497ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2498{
2499 struct ip_vs_scheduler *sched;
2500 struct ip_vs_kstats kstats;
2501 char *sched_name;
2502
2503 sched = rcu_dereference_protected(src->scheduler, 1);
2504 sched_name = sched ? sched->name : "none";
2505 dst->protocol = src->protocol;
2506 dst->addr = src->addr.ip;
2507 dst->port = src->port;
2508 dst->fwmark = src->fwmark;
2509 strlcpy(dst->sched_name, sched_name, sizeof(dst->sched_name));
2510 dst->flags = src->flags;
2511 dst->timeout = src->timeout / HZ;
2512 dst->netmask = src->netmask;
2513 dst->num_dests = src->num_dests;
2514 ip_vs_copy_stats(&kstats, &src->stats);
2515 ip_vs_export_stats_user(&dst->stats, &kstats);
2516}
2517
2518static inline int
2519__ip_vs_get_service_entries(struct netns_ipvs *ipvs,
2520 const struct ip_vs_get_services *get,
2521 struct ip_vs_get_services __user *uptr)
2522{
2523 int idx, count=0;
2524 struct ip_vs_service *svc;
2525 struct ip_vs_service_entry entry;
2526 int ret = 0;
2527
2528 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2529 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2530
2531 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2532 continue;
2533
2534 if (count >= get->num_services)
2535 goto out;
2536 memset(&entry, 0, sizeof(entry));
2537 ip_vs_copy_service(&entry, svc);
2538 if (copy_to_user(&uptr->entrytable[count],
2539 &entry, sizeof(entry))) {
2540 ret = -EFAULT;
2541 goto out;
2542 }
2543 count++;
2544 }
2545 }
2546
2547 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2548 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2549
2550 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2551 continue;
2552
2553 if (count >= get->num_services)
2554 goto out;
2555 memset(&entry, 0, sizeof(entry));
2556 ip_vs_copy_service(&entry, svc);
2557 if (copy_to_user(&uptr->entrytable[count],
2558 &entry, sizeof(entry))) {
2559 ret = -EFAULT;
2560 goto out;
2561 }
2562 count++;
2563 }
2564 }
2565out:
2566 return ret;
2567}
2568
2569static inline int
2570__ip_vs_get_dest_entries(struct netns_ipvs *ipvs, const struct ip_vs_get_dests *get,
2571 struct ip_vs_get_dests __user *uptr)
2572{
2573 struct ip_vs_service *svc;
2574 union nf_inet_addr addr = { .ip = get->addr };
2575 int ret = 0;
2576
2577 rcu_read_lock();
2578 if (get->fwmark)
2579 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, get->fwmark);
2580 else
2581 svc = __ip_vs_service_find(ipvs, AF_INET, get->protocol, &addr,
2582 get->port);
2583 rcu_read_unlock();
2584
2585 if (svc) {
2586 int count = 0;
2587 struct ip_vs_dest *dest;
2588 struct ip_vs_dest_entry entry;
2589 struct ip_vs_kstats kstats;
2590
2591 memset(&entry, 0, sizeof(entry));
2592 list_for_each_entry(dest, &svc->destinations, n_list) {
2593 if (count >= get->num_dests)
2594 break;
2595
2596
2597
2598
2599 if (dest->af != svc->af)
2600 continue;
2601
2602 entry.addr = dest->addr.ip;
2603 entry.port = dest->port;
2604 entry.conn_flags = atomic_read(&dest->conn_flags);
2605 entry.weight = atomic_read(&dest->weight);
2606 entry.u_threshold = dest->u_threshold;
2607 entry.l_threshold = dest->l_threshold;
2608 entry.activeconns = atomic_read(&dest->activeconns);
2609 entry.inactconns = atomic_read(&dest->inactconns);
2610 entry.persistconns = atomic_read(&dest->persistconns);
2611 ip_vs_copy_stats(&kstats, &dest->stats);
2612 ip_vs_export_stats_user(&entry.stats, &kstats);
2613 if (copy_to_user(&uptr->entrytable[count],
2614 &entry, sizeof(entry))) {
2615 ret = -EFAULT;
2616 break;
2617 }
2618 count++;
2619 }
2620 } else
2621 ret = -ESRCH;
2622 return ret;
2623}
2624
2625static inline void
2626__ip_vs_get_timeouts(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2627{
2628#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2629 struct ip_vs_proto_data *pd;
2630#endif
2631
2632 memset(u, 0, sizeof (*u));
2633
2634#ifdef CONFIG_IP_VS_PROTO_TCP
2635 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2636 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2637 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2638#endif
2639#ifdef CONFIG_IP_VS_PROTO_UDP
2640 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2641 u->udp_timeout =
2642 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2643#endif
2644}
2645
2646static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2647 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2648 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2649 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2650 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2651 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2652 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2653 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2654};
2655
2656union ip_vs_get_arglen {
2657 char field_IP_VS_SO_GET_VERSION[64];
2658 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2659 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2660 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2661 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2662 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2663 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
2664};
2665
2666#define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2667
2668static int
2669do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2670{
2671 unsigned char arg[MAX_GET_ARGLEN];
2672 int ret = 0;
2673 unsigned int copylen;
2674 struct net *net = sock_net(sk);
2675 struct netns_ipvs *ipvs = net_ipvs(net);
2676
2677 BUG_ON(!net);
2678 BUILD_BUG_ON(sizeof(arg) > 255);
2679 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2680 return -EPERM;
2681
2682 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2683 return -EINVAL;
2684
2685 copylen = get_arglen[CMDID(cmd)];
2686 if (*len < (int) copylen) {
2687 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
2688 return -EINVAL;
2689 }
2690
2691 if (copy_from_user(arg, user, copylen) != 0)
2692 return -EFAULT;
2693
2694
2695
2696 if (cmd == IP_VS_SO_GET_DAEMON) {
2697 struct ip_vs_daemon_user d[2];
2698
2699 memset(&d, 0, sizeof(d));
2700 mutex_lock(&ipvs->sync_mutex);
2701 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2702 d[0].state = IP_VS_STATE_MASTER;
2703 strlcpy(d[0].mcast_ifn, ipvs->mcfg.mcast_ifn,
2704 sizeof(d[0].mcast_ifn));
2705 d[0].syncid = ipvs->mcfg.syncid;
2706 }
2707 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2708 d[1].state = IP_VS_STATE_BACKUP;
2709 strlcpy(d[1].mcast_ifn, ipvs->bcfg.mcast_ifn,
2710 sizeof(d[1].mcast_ifn));
2711 d[1].syncid = ipvs->bcfg.syncid;
2712 }
2713 if (copy_to_user(user, &d, sizeof(d)) != 0)
2714 ret = -EFAULT;
2715 mutex_unlock(&ipvs->sync_mutex);
2716 return ret;
2717 }
2718
2719 mutex_lock(&__ip_vs_mutex);
2720 switch (cmd) {
2721 case IP_VS_SO_GET_VERSION:
2722 {
2723 char buf[64];
2724
2725 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2726 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2727 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2728 ret = -EFAULT;
2729 goto out;
2730 }
2731 *len = strlen(buf)+1;
2732 }
2733 break;
2734
2735 case IP_VS_SO_GET_INFO:
2736 {
2737 struct ip_vs_getinfo info;
2738 info.version = IP_VS_VERSION_CODE;
2739 info.size = ip_vs_conn_tab_size;
2740 info.num_services = ipvs->num_services;
2741 if (copy_to_user(user, &info, sizeof(info)) != 0)
2742 ret = -EFAULT;
2743 }
2744 break;
2745
2746 case IP_VS_SO_GET_SERVICES:
2747 {
2748 struct ip_vs_get_services *get;
2749 int size;
2750
2751 get = (struct ip_vs_get_services *)arg;
2752 size = sizeof(*get) +
2753 sizeof(struct ip_vs_service_entry) * get->num_services;
2754 if (*len != size) {
2755 pr_err("length: %u != %u\n", *len, size);
2756 ret = -EINVAL;
2757 goto out;
2758 }
2759 ret = __ip_vs_get_service_entries(ipvs, get, user);
2760 }
2761 break;
2762
2763 case IP_VS_SO_GET_SERVICE:
2764 {
2765 struct ip_vs_service_entry *entry;
2766 struct ip_vs_service *svc;
2767 union nf_inet_addr addr;
2768
2769 entry = (struct ip_vs_service_entry *)arg;
2770 addr.ip = entry->addr;
2771 rcu_read_lock();
2772 if (entry->fwmark)
2773 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, entry->fwmark);
2774 else
2775 svc = __ip_vs_service_find(ipvs, AF_INET,
2776 entry->protocol, &addr,
2777 entry->port);
2778 rcu_read_unlock();
2779 if (svc) {
2780 ip_vs_copy_service(entry, svc);
2781 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2782 ret = -EFAULT;
2783 } else
2784 ret = -ESRCH;
2785 }
2786 break;
2787
2788 case IP_VS_SO_GET_DESTS:
2789 {
2790 struct ip_vs_get_dests *get;
2791 int size;
2792
2793 get = (struct ip_vs_get_dests *)arg;
2794 size = sizeof(*get) +
2795 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2796 if (*len != size) {
2797 pr_err("length: %u != %u\n", *len, size);
2798 ret = -EINVAL;
2799 goto out;
2800 }
2801 ret = __ip_vs_get_dest_entries(ipvs, get, user);
2802 }
2803 break;
2804
2805 case IP_VS_SO_GET_TIMEOUT:
2806 {
2807 struct ip_vs_timeout_user t;
2808
2809 __ip_vs_get_timeouts(ipvs, &t);
2810 if (copy_to_user(user, &t, sizeof(t)) != 0)
2811 ret = -EFAULT;
2812 }
2813 break;
2814
2815 default:
2816 ret = -EINVAL;
2817 }
2818
2819out:
2820 mutex_unlock(&__ip_vs_mutex);
2821 return ret;
2822}
2823
2824
2825static struct nf_sockopt_ops ip_vs_sockopts = {
2826 .pf = PF_INET,
2827 .set_optmin = IP_VS_BASE_CTL,
2828 .set_optmax = IP_VS_SO_SET_MAX+1,
2829 .set = do_ip_vs_set_ctl,
2830 .get_optmin = IP_VS_BASE_CTL,
2831 .get_optmax = IP_VS_SO_GET_MAX+1,
2832 .get = do_ip_vs_get_ctl,
2833 .owner = THIS_MODULE,
2834};
2835
2836
2837
2838
2839
2840
2841static struct genl_family ip_vs_genl_family;
2842
2843
2844static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2845 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2846 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2847 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2848 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2849 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2850 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2851};
2852
2853
2854static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2855 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2856 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2857 .len = IP_VS_IFNAME_MAXLEN },
2858 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2859 [IPVS_DAEMON_ATTR_SYNC_MAXLEN] = { .type = NLA_U16 },
2860 [IPVS_DAEMON_ATTR_MCAST_GROUP] = { .type = NLA_U32 },
2861 [IPVS_DAEMON_ATTR_MCAST_GROUP6] = { .len = sizeof(struct in6_addr) },
2862 [IPVS_DAEMON_ATTR_MCAST_PORT] = { .type = NLA_U16 },
2863 [IPVS_DAEMON_ATTR_MCAST_TTL] = { .type = NLA_U8 },
2864};
2865
2866
2867static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2868 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2869 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2870 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2871 .len = sizeof(union nf_inet_addr) },
2872 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2873 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2874 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2875 .len = IP_VS_SCHEDNAME_MAXLEN },
2876 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2877 .len = IP_VS_PENAME_MAXLEN },
2878 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2879 .len = sizeof(struct ip_vs_flags) },
2880 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2881 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2882 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2883};
2884
2885
2886static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2887 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2888 .len = sizeof(union nf_inet_addr) },
2889 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2890 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2891 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2892 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2893 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2894 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2895 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2896 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2897 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2898 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
2899};
2900
2901static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2902 struct ip_vs_kstats *kstats)
2903{
2904 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2905
2906 if (!nl_stats)
2907 return -EMSGSIZE;
2908
2909 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
2910 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
2911 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
2912 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2913 IPVS_STATS_ATTR_PAD) ||
2914 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2915 IPVS_STATS_ATTR_PAD) ||
2916 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
2917 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
2918 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
2919 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
2920 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
2921 goto nla_put_failure;
2922 nla_nest_end(skb, nl_stats);
2923
2924 return 0;
2925
2926nla_put_failure:
2927 nla_nest_cancel(skb, nl_stats);
2928 return -EMSGSIZE;
2929}
2930
2931static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
2932 struct ip_vs_kstats *kstats)
2933{
2934 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2935
2936 if (!nl_stats)
2937 return -EMSGSIZE;
2938
2939 if (nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CONNS, kstats->conns,
2940 IPVS_STATS_ATTR_PAD) ||
2941 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts,
2942 IPVS_STATS_ATTR_PAD) ||
2943 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts,
2944 IPVS_STATS_ATTR_PAD) ||
2945 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes,
2946 IPVS_STATS_ATTR_PAD) ||
2947 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes,
2948 IPVS_STATS_ATTR_PAD) ||
2949 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_CPS, kstats->cps,
2950 IPVS_STATS_ATTR_PAD) ||
2951 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps,
2952 IPVS_STATS_ATTR_PAD) ||
2953 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps,
2954 IPVS_STATS_ATTR_PAD) ||
2955 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps,
2956 IPVS_STATS_ATTR_PAD) ||
2957 nla_put_u64_64bit(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps,
2958 IPVS_STATS_ATTR_PAD))
2959 goto nla_put_failure;
2960 nla_nest_end(skb, nl_stats);
2961
2962 return 0;
2963
2964nla_put_failure:
2965 nla_nest_cancel(skb, nl_stats);
2966 return -EMSGSIZE;
2967}
2968
2969static int ip_vs_genl_fill_service(struct sk_buff *skb,
2970 struct ip_vs_service *svc)
2971{
2972 struct ip_vs_scheduler *sched;
2973 struct ip_vs_pe *pe;
2974 struct nlattr *nl_service;
2975 struct ip_vs_flags flags = { .flags = svc->flags,
2976 .mask = ~0 };
2977 struct ip_vs_kstats kstats;
2978 char *sched_name;
2979
2980 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2981 if (!nl_service)
2982 return -EMSGSIZE;
2983
2984 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2985 goto nla_put_failure;
2986 if (svc->fwmark) {
2987 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2988 goto nla_put_failure;
2989 } else {
2990 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2991 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
2992 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
2993 goto nla_put_failure;
2994 }
2995
2996 sched = rcu_dereference_protected(svc->scheduler, 1);
2997 sched_name = sched ? sched->name : "none";
2998 pe = rcu_dereference_protected(svc->pe, 1);
2999 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched_name) ||
3000 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
3001 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
3002 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
3003 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
3004 goto nla_put_failure;
3005 ip_vs_copy_stats(&kstats, &svc->stats);
3006 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
3007 goto nla_put_failure;
3008 if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
3009 goto nla_put_failure;
3010
3011 nla_nest_end(skb, nl_service);
3012
3013 return 0;
3014
3015nla_put_failure:
3016 nla_nest_cancel(skb, nl_service);
3017 return -EMSGSIZE;
3018}
3019
3020static int ip_vs_genl_dump_service(struct sk_buff *skb,
3021 struct ip_vs_service *svc,
3022 struct netlink_callback *cb)
3023{
3024 void *hdr;
3025
3026 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3027 &ip_vs_genl_family, NLM_F_MULTI,
3028 IPVS_CMD_NEW_SERVICE);
3029 if (!hdr)
3030 return -EMSGSIZE;
3031
3032 if (ip_vs_genl_fill_service(skb, svc) < 0)
3033 goto nla_put_failure;
3034
3035 genlmsg_end(skb, hdr);
3036 return 0;
3037
3038nla_put_failure:
3039 genlmsg_cancel(skb, hdr);
3040 return -EMSGSIZE;
3041}
3042
3043static int ip_vs_genl_dump_services(struct sk_buff *skb,
3044 struct netlink_callback *cb)
3045{
3046 int idx = 0, i;
3047 int start = cb->args[0];
3048 struct ip_vs_service *svc;
3049 struct net *net = sock_net(skb->sk);
3050 struct netns_ipvs *ipvs = net_ipvs(net);
3051
3052 mutex_lock(&__ip_vs_mutex);
3053 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3054 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
3055 if (++idx <= start || (svc->ipvs != ipvs))
3056 continue;
3057 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3058 idx--;
3059 goto nla_put_failure;
3060 }
3061 }
3062 }
3063
3064 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3065 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
3066 if (++idx <= start || (svc->ipvs != ipvs))
3067 continue;
3068 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3069 idx--;
3070 goto nla_put_failure;
3071 }
3072 }
3073 }
3074
3075nla_put_failure:
3076 mutex_unlock(&__ip_vs_mutex);
3077 cb->args[0] = idx;
3078
3079 return skb->len;
3080}
3081
3082static bool ip_vs_is_af_valid(int af)
3083{
3084 if (af == AF_INET)
3085 return true;
3086#ifdef CONFIG_IP_VS_IPV6
3087 if (af == AF_INET6 && ipv6_mod_enabled())
3088 return true;
3089#endif
3090 return false;
3091}
3092
3093static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs,
3094 struct ip_vs_service_user_kern *usvc,
3095 struct nlattr *nla, int full_entry,
3096 struct ip_vs_service **ret_svc)
3097{
3098 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3099 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
3100 struct ip_vs_service *svc;
3101
3102
3103 if (nla == NULL ||
3104 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla,
3105 ip_vs_svc_policy, NULL))
3106 return -EINVAL;
3107
3108 nla_af = attrs[IPVS_SVC_ATTR_AF];
3109 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3110 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3111 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3112 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3113
3114 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3115 return -EINVAL;
3116
3117 memset(usvc, 0, sizeof(*usvc));
3118
3119 usvc->af = nla_get_u16(nla_af);
3120 if (!ip_vs_is_af_valid(usvc->af))
3121 return -EAFNOSUPPORT;
3122
3123 if (nla_fwmark) {
3124 usvc->protocol = IPPROTO_TCP;
3125 usvc->fwmark = nla_get_u32(nla_fwmark);
3126 } else {
3127 usvc->protocol = nla_get_u16(nla_protocol);
3128 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
3129 usvc->port = nla_get_be16(nla_port);
3130 usvc->fwmark = 0;
3131 }
3132
3133 rcu_read_lock();
3134 if (usvc->fwmark)
3135 svc = __ip_vs_svc_fwm_find(ipvs, usvc->af, usvc->fwmark);
3136 else
3137 svc = __ip_vs_service_find(ipvs, usvc->af, usvc->protocol,
3138 &usvc->addr, usvc->port);
3139 rcu_read_unlock();
3140 *ret_svc = svc;
3141
3142
3143 if (full_entry) {
3144 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
3145 *nla_netmask;
3146 struct ip_vs_flags flags;
3147
3148 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
3149 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
3150 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3151 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3152 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3153
3154 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3155 return -EINVAL;
3156
3157 nla_memcpy(&flags, nla_flags, sizeof(flags));
3158
3159
3160 if (svc)
3161 usvc->flags = svc->flags;
3162
3163
3164 usvc->flags = (usvc->flags & ~flags.mask) |
3165 (flags.flags & flags.mask);
3166 usvc->sched_name = nla_data(nla_sched);
3167 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
3168 usvc->timeout = nla_get_u32(nla_timeout);
3169 usvc->netmask = nla_get_be32(nla_netmask);
3170 }
3171
3172 return 0;
3173}
3174
3175static struct ip_vs_service *ip_vs_genl_find_service(struct netns_ipvs *ipvs,
3176 struct nlattr *nla)
3177{
3178 struct ip_vs_service_user_kern usvc;
3179 struct ip_vs_service *svc;
3180 int ret;
3181
3182 ret = ip_vs_genl_parse_service(ipvs, &usvc, nla, 0, &svc);
3183 return ret ? ERR_PTR(ret) : svc;
3184}
3185
3186static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3187{
3188 struct nlattr *nl_dest;
3189 struct ip_vs_kstats kstats;
3190
3191 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3192 if (!nl_dest)
3193 return -EMSGSIZE;
3194
3195 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
3196 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
3197 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3198 (atomic_read(&dest->conn_flags) &
3199 IP_VS_CONN_F_FWD_MASK)) ||
3200 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3201 atomic_read(&dest->weight)) ||
3202 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3203 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3204 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3205 atomic_read(&dest->activeconns)) ||
3206 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3207 atomic_read(&dest->inactconns)) ||
3208 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
3209 atomic_read(&dest->persistconns)) ||
3210 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
3211 goto nla_put_failure;
3212 ip_vs_copy_stats(&kstats, &dest->stats);
3213 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
3214 goto nla_put_failure;
3215 if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
3216 goto nla_put_failure;
3217
3218 nla_nest_end(skb, nl_dest);
3219
3220 return 0;
3221
3222nla_put_failure:
3223 nla_nest_cancel(skb, nl_dest);
3224 return -EMSGSIZE;
3225}
3226
3227static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3228 struct netlink_callback *cb)
3229{
3230 void *hdr;
3231
3232 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3233 &ip_vs_genl_family, NLM_F_MULTI,
3234 IPVS_CMD_NEW_DEST);
3235 if (!hdr)
3236 return -EMSGSIZE;
3237
3238 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3239 goto nla_put_failure;
3240
3241 genlmsg_end(skb, hdr);
3242 return 0;
3243
3244nla_put_failure:
3245 genlmsg_cancel(skb, hdr);
3246 return -EMSGSIZE;
3247}
3248
3249static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3250 struct netlink_callback *cb)
3251{
3252 int idx = 0;
3253 int start = cb->args[0];
3254 struct ip_vs_service *svc;
3255 struct ip_vs_dest *dest;
3256 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
3257 struct net *net = sock_net(skb->sk);
3258 struct netns_ipvs *ipvs = net_ipvs(net);
3259
3260 mutex_lock(&__ip_vs_mutex);
3261
3262
3263 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, IPVS_CMD_ATTR_MAX,
3264 ip_vs_cmd_policy, NULL))
3265 goto out_err;
3266
3267
3268 svc = ip_vs_genl_find_service(ipvs, attrs[IPVS_CMD_ATTR_SERVICE]);
3269 if (IS_ERR_OR_NULL(svc))
3270 goto out_err;
3271
3272
3273 list_for_each_entry(dest, &svc->destinations, n_list) {
3274 if (++idx <= start)
3275 continue;
3276 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3277 idx--;
3278 goto nla_put_failure;
3279 }
3280 }
3281
3282nla_put_failure:
3283 cb->args[0] = idx;
3284
3285out_err:
3286 mutex_unlock(&__ip_vs_mutex);
3287
3288 return skb->len;
3289}
3290
3291static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
3292 struct nlattr *nla, int full_entry)
3293{
3294 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3295 struct nlattr *nla_addr, *nla_port;
3296 struct nlattr *nla_addr_family;
3297
3298
3299 if (nla == NULL ||
3300 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla,
3301 ip_vs_dest_policy, NULL))
3302 return -EINVAL;
3303
3304 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3305 nla_port = attrs[IPVS_DEST_ATTR_PORT];
3306 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
3307
3308 if (!(nla_addr && nla_port))
3309 return -EINVAL;
3310
3311 memset(udest, 0, sizeof(*udest));
3312
3313 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
3314 udest->port = nla_get_be16(nla_port);
3315
3316 if (nla_addr_family)
3317 udest->af = nla_get_u16(nla_addr_family);
3318 else
3319 udest->af = 0;
3320
3321
3322 if (full_entry) {
3323 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3324 *nla_l_thresh;
3325
3326 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3327 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3328 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3329 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3330
3331 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3332 return -EINVAL;
3333
3334 udest->conn_flags = nla_get_u32(nla_fwd)
3335 & IP_VS_CONN_F_FWD_MASK;
3336 udest->weight = nla_get_u32(nla_weight);
3337 udest->u_threshold = nla_get_u32(nla_u_thresh);
3338 udest->l_threshold = nla_get_u32(nla_l_thresh);
3339 }
3340
3341 return 0;
3342}
3343
3344static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3345 struct ipvs_sync_daemon_cfg *c)
3346{
3347 struct nlattr *nl_daemon;
3348
3349 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3350 if (!nl_daemon)
3351 return -EMSGSIZE;
3352
3353 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3354 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, c->mcast_ifn) ||
3355 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, c->syncid) ||
3356 nla_put_u16(skb, IPVS_DAEMON_ATTR_SYNC_MAXLEN, c->sync_maxlen) ||
3357 nla_put_u16(skb, IPVS_DAEMON_ATTR_MCAST_PORT, c->mcast_port) ||
3358 nla_put_u8(skb, IPVS_DAEMON_ATTR_MCAST_TTL, c->mcast_ttl))
3359 goto nla_put_failure;
3360#ifdef CONFIG_IP_VS_IPV6
3361 if (c->mcast_af == AF_INET6) {
3362 if (nla_put_in6_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP6,
3363 &c->mcast_group.in6))
3364 goto nla_put_failure;
3365 } else
3366#endif
3367 if (c->mcast_af == AF_INET &&
3368 nla_put_in_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP,
3369 c->mcast_group.ip))
3370 goto nla_put_failure;
3371 nla_nest_end(skb, nl_daemon);
3372
3373 return 0;
3374
3375nla_put_failure:
3376 nla_nest_cancel(skb, nl_daemon);
3377 return -EMSGSIZE;
3378}
3379
3380static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3381 struct ipvs_sync_daemon_cfg *c,
3382 struct netlink_callback *cb)
3383{
3384 void *hdr;
3385 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3386 &ip_vs_genl_family, NLM_F_MULTI,
3387 IPVS_CMD_NEW_DAEMON);
3388 if (!hdr)
3389 return -EMSGSIZE;
3390
3391 if (ip_vs_genl_fill_daemon(skb, state, c))
3392 goto nla_put_failure;
3393
3394 genlmsg_end(skb, hdr);
3395 return 0;
3396
3397nla_put_failure:
3398 genlmsg_cancel(skb, hdr);
3399 return -EMSGSIZE;
3400}
3401
3402static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3403 struct netlink_callback *cb)
3404{
3405 struct net *net = sock_net(skb->sk);
3406 struct netns_ipvs *ipvs = net_ipvs(net);
3407
3408 mutex_lock(&ipvs->sync_mutex);
3409 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
3410 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
3411 &ipvs->mcfg, cb) < 0)
3412 goto nla_put_failure;
3413
3414 cb->args[0] = 1;
3415 }
3416
3417 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3418 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3419 &ipvs->bcfg, cb) < 0)
3420 goto nla_put_failure;
3421
3422 cb->args[1] = 1;
3423 }
3424
3425nla_put_failure:
3426 mutex_unlock(&ipvs->sync_mutex);
3427
3428 return skb->len;
3429}
3430
3431static int ip_vs_genl_new_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3432{
3433 struct ipvs_sync_daemon_cfg c;
3434 struct nlattr *a;
3435 int ret;
3436
3437 memset(&c, 0, sizeof(c));
3438 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3439 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3440 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3441 return -EINVAL;
3442 strlcpy(c.mcast_ifn, nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3443 sizeof(c.mcast_ifn));
3444 c.syncid = nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]);
3445
3446 a = attrs[IPVS_DAEMON_ATTR_SYNC_MAXLEN];
3447 if (a)
3448 c.sync_maxlen = nla_get_u16(a);
3449
3450 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP];
3451 if (a) {
3452 c.mcast_af = AF_INET;
3453 c.mcast_group.ip = nla_get_in_addr(a);
3454 if (!ipv4_is_multicast(c.mcast_group.ip))
3455 return -EINVAL;
3456 } else {
3457 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP6];
3458 if (a) {
3459#ifdef CONFIG_IP_VS_IPV6
3460 int addr_type;
3461
3462 c.mcast_af = AF_INET6;
3463 c.mcast_group.in6 = nla_get_in6_addr(a);
3464 addr_type = ipv6_addr_type(&c.mcast_group.in6);
3465 if (!(addr_type & IPV6_ADDR_MULTICAST))
3466 return -EINVAL;
3467#else
3468 return -EAFNOSUPPORT;
3469#endif
3470 }
3471 }
3472
3473 a = attrs[IPVS_DAEMON_ATTR_MCAST_PORT];
3474 if (a)
3475 c.mcast_port = nla_get_u16(a);
3476
3477 a = attrs[IPVS_DAEMON_ATTR_MCAST_TTL];
3478 if (a)
3479 c.mcast_ttl = nla_get_u8(a);
3480
3481
3482
3483
3484 if (ipvs->mixed_address_family_dests > 0)
3485 return -EINVAL;
3486
3487 rtnl_lock();
3488 mutex_lock(&ipvs->sync_mutex);
3489 ret = start_sync_thread(ipvs, &c,
3490 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3491 mutex_unlock(&ipvs->sync_mutex);
3492 rtnl_unlock();
3493 return ret;
3494}
3495
3496static int ip_vs_genl_del_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3497{
3498 int ret;
3499
3500 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3501 return -EINVAL;
3502
3503 mutex_lock(&ipvs->sync_mutex);
3504 ret = stop_sync_thread(ipvs,
3505 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3506 mutex_unlock(&ipvs->sync_mutex);
3507 return ret;
3508}
3509
3510static int ip_vs_genl_set_config(struct netns_ipvs *ipvs, struct nlattr **attrs)
3511{
3512 struct ip_vs_timeout_user t;
3513
3514 __ip_vs_get_timeouts(ipvs, &t);
3515
3516 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3517 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3518
3519 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3520 t.tcp_fin_timeout =
3521 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3522
3523 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3524 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3525
3526 return ip_vs_set_timeout(ipvs, &t);
3527}
3528
3529static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
3530{
3531 int ret = -EINVAL, cmd;
3532 struct net *net = sock_net(skb->sk);
3533 struct netns_ipvs *ipvs = net_ipvs(net);
3534
3535 cmd = info->genlhdr->cmd;
3536
3537 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
3538 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3539
3540 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3541 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3542 info->attrs[IPVS_CMD_ATTR_DAEMON],
3543 ip_vs_daemon_policy, info->extack))
3544 goto out;
3545
3546 if (cmd == IPVS_CMD_NEW_DAEMON)
3547 ret = ip_vs_genl_new_daemon(ipvs, daemon_attrs);
3548 else
3549 ret = ip_vs_genl_del_daemon(ipvs, daemon_attrs);
3550 }
3551
3552out:
3553 return ret;
3554}
3555
3556static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3557{
3558 struct ip_vs_service *svc = NULL;
3559 struct ip_vs_service_user_kern usvc;
3560 struct ip_vs_dest_user_kern udest;
3561 int ret = 0, cmd;
3562 int need_full_svc = 0, need_full_dest = 0;
3563 struct net *net = sock_net(skb->sk);
3564 struct netns_ipvs *ipvs = net_ipvs(net);
3565
3566 cmd = info->genlhdr->cmd;
3567
3568 mutex_lock(&__ip_vs_mutex);
3569
3570 if (cmd == IPVS_CMD_FLUSH) {
3571 ret = ip_vs_flush(ipvs, false);
3572 goto out;
3573 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3574 ret = ip_vs_genl_set_config(ipvs, info->attrs);
3575 goto out;
3576 } else if (cmd == IPVS_CMD_ZERO &&
3577 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3578 ret = ip_vs_zero_all(ipvs);
3579 goto out;
3580 }
3581
3582
3583
3584
3585 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3586 need_full_svc = 1;
3587
3588 ret = ip_vs_genl_parse_service(ipvs, &usvc,
3589 info->attrs[IPVS_CMD_ATTR_SERVICE],
3590 need_full_svc, &svc);
3591 if (ret)
3592 goto out;
3593
3594
3595 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3596 ret = -ESRCH;
3597 goto out;
3598 }
3599
3600
3601
3602
3603 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3604 cmd == IPVS_CMD_DEL_DEST) {
3605 if (cmd != IPVS_CMD_DEL_DEST)
3606 need_full_dest = 1;
3607
3608 ret = ip_vs_genl_parse_dest(&udest,
3609 info->attrs[IPVS_CMD_ATTR_DEST],
3610 need_full_dest);
3611 if (ret)
3612 goto out;
3613
3614
3615
3616
3617
3618
3619
3620 if (udest.af == 0)
3621 udest.af = svc->af;
3622
3623 if (!ip_vs_is_af_valid(udest.af)) {
3624 ret = -EAFNOSUPPORT;
3625 goto out;
3626 }
3627
3628 if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
3629
3630
3631
3632 if (ipvs->sync_state) {
3633 ret = -EINVAL;
3634 goto out;
3635 }
3636
3637
3638 switch (udest.conn_flags) {
3639 case IP_VS_CONN_F_TUNNEL:
3640
3641 break;
3642 default:
3643 ret = -EINVAL;
3644 goto out;
3645 }
3646 }
3647 }
3648
3649 switch (cmd) {
3650 case IPVS_CMD_NEW_SERVICE:
3651 if (svc == NULL)
3652 ret = ip_vs_add_service(ipvs, &usvc, &svc);
3653 else
3654 ret = -EEXIST;
3655 break;
3656 case IPVS_CMD_SET_SERVICE:
3657 ret = ip_vs_edit_service(svc, &usvc);
3658 break;
3659 case IPVS_CMD_DEL_SERVICE:
3660 ret = ip_vs_del_service(svc);
3661
3662 break;
3663 case IPVS_CMD_NEW_DEST:
3664 ret = ip_vs_add_dest(svc, &udest);
3665 break;
3666 case IPVS_CMD_SET_DEST:
3667 ret = ip_vs_edit_dest(svc, &udest);
3668 break;
3669 case IPVS_CMD_DEL_DEST:
3670 ret = ip_vs_del_dest(svc, &udest);
3671 break;
3672 case IPVS_CMD_ZERO:
3673 ret = ip_vs_zero_service(svc);
3674 break;
3675 default:
3676 ret = -EINVAL;
3677 }
3678
3679out:
3680 mutex_unlock(&__ip_vs_mutex);
3681
3682 return ret;
3683}
3684
3685static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3686{
3687 struct sk_buff *msg;
3688 void *reply;
3689 int ret, cmd, reply_cmd;
3690 struct net *net = sock_net(skb->sk);
3691 struct netns_ipvs *ipvs = net_ipvs(net);
3692
3693 cmd = info->genlhdr->cmd;
3694
3695 if (cmd == IPVS_CMD_GET_SERVICE)
3696 reply_cmd = IPVS_CMD_NEW_SERVICE;
3697 else if (cmd == IPVS_CMD_GET_INFO)
3698 reply_cmd = IPVS_CMD_SET_INFO;
3699 else if (cmd == IPVS_CMD_GET_CONFIG)
3700 reply_cmd = IPVS_CMD_SET_CONFIG;
3701 else {
3702 pr_err("unknown Generic Netlink command\n");
3703 return -EINVAL;
3704 }
3705
3706 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3707 if (!msg)
3708 return -ENOMEM;
3709
3710 mutex_lock(&__ip_vs_mutex);
3711
3712 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3713 if (reply == NULL)
3714 goto nla_put_failure;
3715
3716 switch (cmd) {
3717 case IPVS_CMD_GET_SERVICE:
3718 {
3719 struct ip_vs_service *svc;
3720
3721 svc = ip_vs_genl_find_service(ipvs,
3722 info->attrs[IPVS_CMD_ATTR_SERVICE]);
3723 if (IS_ERR(svc)) {
3724 ret = PTR_ERR(svc);
3725 goto out_err;
3726 } else if (svc) {
3727 ret = ip_vs_genl_fill_service(msg, svc);
3728 if (ret)
3729 goto nla_put_failure;
3730 } else {
3731 ret = -ESRCH;
3732 goto out_err;
3733 }
3734
3735 break;
3736 }
3737
3738 case IPVS_CMD_GET_CONFIG:
3739 {
3740 struct ip_vs_timeout_user t;
3741
3742 __ip_vs_get_timeouts(ipvs, &t);
3743#ifdef CONFIG_IP_VS_PROTO_TCP
3744 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3745 t.tcp_timeout) ||
3746 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3747 t.tcp_fin_timeout))
3748 goto nla_put_failure;
3749#endif
3750#ifdef CONFIG_IP_VS_PROTO_UDP
3751 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3752 goto nla_put_failure;
3753#endif
3754
3755 break;
3756 }
3757
3758 case IPVS_CMD_GET_INFO:
3759 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3760 IP_VS_VERSION_CODE) ||
3761 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3762 ip_vs_conn_tab_size))
3763 goto nla_put_failure;
3764 break;
3765 }
3766
3767 genlmsg_end(msg, reply);
3768 ret = genlmsg_reply(msg, info);
3769 goto out;
3770
3771nla_put_failure:
3772 pr_err("not enough space in Netlink message\n");
3773 ret = -EMSGSIZE;
3774
3775out_err:
3776 nlmsg_free(msg);
3777out:
3778 mutex_unlock(&__ip_vs_mutex);
3779
3780 return ret;
3781}
3782
3783
3784static const struct genl_ops ip_vs_genl_ops[] = {
3785 {
3786 .cmd = IPVS_CMD_NEW_SERVICE,
3787 .flags = GENL_ADMIN_PERM,
3788 .policy = ip_vs_cmd_policy,
3789 .doit = ip_vs_genl_set_cmd,
3790 },
3791 {
3792 .cmd = IPVS_CMD_SET_SERVICE,
3793 .flags = GENL_ADMIN_PERM,
3794 .policy = ip_vs_cmd_policy,
3795 .doit = ip_vs_genl_set_cmd,
3796 },
3797 {
3798 .cmd = IPVS_CMD_DEL_SERVICE,
3799 .flags = GENL_ADMIN_PERM,
3800 .policy = ip_vs_cmd_policy,
3801 .doit = ip_vs_genl_set_cmd,
3802 },
3803 {
3804 .cmd = IPVS_CMD_GET_SERVICE,
3805 .flags = GENL_ADMIN_PERM,
3806 .doit = ip_vs_genl_get_cmd,
3807 .dumpit = ip_vs_genl_dump_services,
3808 .policy = ip_vs_cmd_policy,
3809 },
3810 {
3811 .cmd = IPVS_CMD_NEW_DEST,
3812 .flags = GENL_ADMIN_PERM,
3813 .policy = ip_vs_cmd_policy,
3814 .doit = ip_vs_genl_set_cmd,
3815 },
3816 {
3817 .cmd = IPVS_CMD_SET_DEST,
3818 .flags = GENL_ADMIN_PERM,
3819 .policy = ip_vs_cmd_policy,
3820 .doit = ip_vs_genl_set_cmd,
3821 },
3822 {
3823 .cmd = IPVS_CMD_DEL_DEST,
3824 .flags = GENL_ADMIN_PERM,
3825 .policy = ip_vs_cmd_policy,
3826 .doit = ip_vs_genl_set_cmd,
3827 },
3828 {
3829 .cmd = IPVS_CMD_GET_DEST,
3830 .flags = GENL_ADMIN_PERM,
3831 .policy = ip_vs_cmd_policy,
3832 .dumpit = ip_vs_genl_dump_dests,
3833 },
3834 {
3835 .cmd = IPVS_CMD_NEW_DAEMON,
3836 .flags = GENL_ADMIN_PERM,
3837 .policy = ip_vs_cmd_policy,
3838 .doit = ip_vs_genl_set_daemon,
3839 },
3840 {
3841 .cmd = IPVS_CMD_DEL_DAEMON,
3842 .flags = GENL_ADMIN_PERM,
3843 .policy = ip_vs_cmd_policy,
3844 .doit = ip_vs_genl_set_daemon,
3845 },
3846 {
3847 .cmd = IPVS_CMD_GET_DAEMON,
3848 .flags = GENL_ADMIN_PERM,
3849 .dumpit = ip_vs_genl_dump_daemons,
3850 },
3851 {
3852 .cmd = IPVS_CMD_SET_CONFIG,
3853 .flags = GENL_ADMIN_PERM,
3854 .policy = ip_vs_cmd_policy,
3855 .doit = ip_vs_genl_set_cmd,
3856 },
3857 {
3858 .cmd = IPVS_CMD_GET_CONFIG,
3859 .flags = GENL_ADMIN_PERM,
3860 .doit = ip_vs_genl_get_cmd,
3861 },
3862 {
3863 .cmd = IPVS_CMD_GET_INFO,
3864 .flags = GENL_ADMIN_PERM,
3865 .doit = ip_vs_genl_get_cmd,
3866 },
3867 {
3868 .cmd = IPVS_CMD_ZERO,
3869 .flags = GENL_ADMIN_PERM,
3870 .policy = ip_vs_cmd_policy,
3871 .doit = ip_vs_genl_set_cmd,
3872 },
3873 {
3874 .cmd = IPVS_CMD_FLUSH,
3875 .flags = GENL_ADMIN_PERM,
3876 .doit = ip_vs_genl_set_cmd,
3877 },
3878};
3879
3880static struct genl_family ip_vs_genl_family __ro_after_init = {
3881 .hdrsize = 0,
3882 .name = IPVS_GENL_NAME,
3883 .version = IPVS_GENL_VERSION,
3884 .maxattr = IPVS_CMD_ATTR_MAX,
3885 .netnsok = true,
3886 .module = THIS_MODULE,
3887 .ops = ip_vs_genl_ops,
3888 .n_ops = ARRAY_SIZE(ip_vs_genl_ops),
3889};
3890
3891static int __init ip_vs_genl_register(void)
3892{
3893 return genl_register_family(&ip_vs_genl_family);
3894}
3895
3896static void ip_vs_genl_unregister(void)
3897{
3898 genl_unregister_family(&ip_vs_genl_family);
3899}
3900
3901
3902
3903
3904
3905
3906#ifdef CONFIG_SYSCTL
3907static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs)
3908{
3909 struct net *net = ipvs->net;
3910 int idx;
3911 struct ctl_table *tbl;
3912
3913 atomic_set(&ipvs->dropentry, 0);
3914 spin_lock_init(&ipvs->dropentry_lock);
3915 spin_lock_init(&ipvs->droppacket_lock);
3916 spin_lock_init(&ipvs->securetcp_lock);
3917
3918 if (!net_eq(net, &init_net)) {
3919 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3920 if (tbl == NULL)
3921 return -ENOMEM;
3922
3923
3924 if (net->user_ns != &init_user_ns)
3925 tbl[0].procname = NULL;
3926 } else
3927 tbl = vs_vars;
3928
3929 for (idx = 0; idx < ARRAY_SIZE(vs_vars); idx++) {
3930 if (tbl[idx].proc_handler == proc_do_defense_mode)
3931 tbl[idx].extra2 = ipvs;
3932 }
3933 idx = 0;
3934 ipvs->sysctl_amemthresh = 1024;
3935 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3936 ipvs->sysctl_am_droprate = 10;
3937 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3938 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3939 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3940#ifdef CONFIG_IP_VS_NFCT
3941 tbl[idx++].data = &ipvs->sysctl_conntrack;
3942#endif
3943 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3944 ipvs->sysctl_snat_reroute = 1;
3945 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3946 ipvs->sysctl_sync_ver = 1;
3947 tbl[idx++].data = &ipvs->sysctl_sync_ver;
3948 ipvs->sysctl_sync_ports = 1;
3949 tbl[idx++].data = &ipvs->sysctl_sync_ports;
3950 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
3951 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3952 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3953 ipvs->sysctl_sync_sock_size = 0;
3954 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
3955 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3956 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
3957 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3958 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
3959 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
3960 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3961 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
3962 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3963 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
3964 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3965 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3966 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3967 tbl[idx++].data = &ipvs->sysctl_sync_retries;
3968 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3969 ipvs->sysctl_pmtu_disc = 1;
3970 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
3971 tbl[idx++].data = &ipvs->sysctl_backup_only;
3972 ipvs->sysctl_conn_reuse_mode = 1;
3973 tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
3974 tbl[idx++].data = &ipvs->sysctl_schedule_icmp;
3975 tbl[idx++].data = &ipvs->sysctl_ignore_tunneled;
3976
3977 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
3978 if (ipvs->sysctl_hdr == NULL) {
3979 if (!net_eq(net, &init_net))
3980 kfree(tbl);
3981 return -ENOMEM;
3982 }
3983 ip_vs_start_estimator(ipvs, &ipvs->tot_stats);
3984 ipvs->sysctl_tbl = tbl;
3985
3986 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3987 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
3988
3989 return 0;
3990}
3991
3992static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs)
3993{
3994 struct net *net = ipvs->net;
3995
3996 cancel_delayed_work_sync(&ipvs->defense_work);
3997 cancel_work_sync(&ipvs->defense_work.work);
3998 unregister_net_sysctl_table(ipvs->sysctl_hdr);
3999 ip_vs_stop_estimator(ipvs, &ipvs->tot_stats);
4000
4001 if (!net_eq(net, &init_net))
4002 kfree(ipvs->sysctl_tbl);
4003}
4004
4005#else
4006
4007static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs) { return 0; }
4008static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs) { }
4009
4010#endif
4011
4012static struct notifier_block ip_vs_dst_notifier = {
4013 .notifier_call = ip_vs_dst_event,
4014};
4015
4016int __net_init ip_vs_control_net_init(struct netns_ipvs *ipvs)
4017{
4018 int i, idx;
4019
4020
4021 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
4022 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
4023
4024 INIT_LIST_HEAD(&ipvs->dest_trash);
4025 spin_lock_init(&ipvs->dest_trash_lock);
4026 timer_setup(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire, 0);
4027 atomic_set(&ipvs->ftpsvc_counter, 0);
4028 atomic_set(&ipvs->nullsvc_counter, 0);
4029 atomic_set(&ipvs->conn_out_counter, 0);
4030
4031
4032 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
4033 if (!ipvs->tot_stats.cpustats)
4034 return -ENOMEM;
4035
4036 for_each_possible_cpu(i) {
4037 struct ip_vs_cpu_stats *ipvs_tot_stats;
4038 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
4039 u64_stats_init(&ipvs_tot_stats->syncp);
4040 }
4041
4042 spin_lock_init(&ipvs->tot_stats.lock);
4043
4044 proc_create("ip_vs", 0, ipvs->net->proc_net, &ip_vs_info_fops);
4045 proc_create("ip_vs_stats", 0, ipvs->net->proc_net, &ip_vs_stats_fops);
4046 proc_create("ip_vs_stats_percpu", 0, ipvs->net->proc_net,
4047 &ip_vs_stats_percpu_fops);
4048
4049 if (ip_vs_control_net_init_sysctl(ipvs))
4050 goto err;
4051
4052 return 0;
4053
4054err:
4055 free_percpu(ipvs->tot_stats.cpustats);
4056 return -ENOMEM;
4057}
4058
4059void __net_exit ip_vs_control_net_cleanup(struct netns_ipvs *ipvs)
4060{
4061 ip_vs_trash_cleanup(ipvs);
4062 ip_vs_control_net_cleanup_sysctl(ipvs);
4063 remove_proc_entry("ip_vs_stats_percpu", ipvs->net->proc_net);
4064 remove_proc_entry("ip_vs_stats", ipvs->net->proc_net);
4065 remove_proc_entry("ip_vs", ipvs->net->proc_net);
4066 free_percpu(ipvs->tot_stats.cpustats);
4067}
4068
4069int __init ip_vs_register_nl_ioctl(void)
4070{
4071 int ret;
4072
4073 ret = nf_register_sockopt(&ip_vs_sockopts);
4074 if (ret) {
4075 pr_err("cannot register sockopt.\n");
4076 goto err_sock;
4077 }
4078
4079 ret = ip_vs_genl_register();
4080 if (ret) {
4081 pr_err("cannot register Generic Netlink interface.\n");
4082 goto err_genl;
4083 }
4084 return 0;
4085
4086err_genl:
4087 nf_unregister_sockopt(&ip_vs_sockopts);
4088err_sock:
4089 return ret;
4090}
4091
4092void ip_vs_unregister_nl_ioctl(void)
4093{
4094 ip_vs_genl_unregister();
4095 nf_unregister_sockopt(&ip_vs_sockopts);
4096}
4097
4098int __init ip_vs_control_init(void)
4099{
4100 int idx;
4101 int ret;
4102
4103 EnterFunction(2);
4104
4105
4106 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
4107 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
4108 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
4109 }
4110
4111 smp_wmb();
4112
4113 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
4114 if (ret < 0)
4115 return ret;
4116
4117 LeaveFunction(2);
4118 return 0;
4119}
4120
4121
4122void ip_vs_control_cleanup(void)
4123{
4124 EnterFunction(2);
4125 unregister_netdevice_notifier(&ip_vs_dst_notifier);
4126 LeaveFunction(2);
4127}
4128