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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 <asm/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 %pF\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 %pF\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 == NULL
430 && protocol == IPPROTO_TCP
431 && atomic_read(&ipvs->ftpsvc_counter)
432 && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
433
434
435
436
437 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, FTPPORT);
438 }
439
440 if (svc == NULL
441 && atomic_read(&ipvs->nullsvc_counter)) {
442
443
444
445 svc = __ip_vs_service_find(ipvs, af, protocol, vaddr, 0);
446 }
447
448 out:
449 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
450 fwmark, ip_vs_proto_name(protocol),
451 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
452 svc ? "hit" : "not hit");
453
454 return svc;
455}
456
457
458static inline void
459__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
460{
461 atomic_inc(&svc->refcnt);
462 rcu_assign_pointer(dest->svc, svc);
463}
464
465static void ip_vs_service_free(struct ip_vs_service *svc)
466{
467 free_percpu(svc->stats.cpustats);
468 kfree(svc);
469}
470
471static void ip_vs_service_rcu_free(struct rcu_head *head)
472{
473 struct ip_vs_service *svc;
474
475 svc = container_of(head, struct ip_vs_service, rcu_head);
476 ip_vs_service_free(svc);
477}
478
479static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
480{
481 if (atomic_dec_and_test(&svc->refcnt)) {
482 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
483 svc->fwmark,
484 IP_VS_DBG_ADDR(svc->af, &svc->addr),
485 ntohs(svc->port));
486 if (do_delay)
487 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
488 else
489 ip_vs_service_free(svc);
490 }
491}
492
493
494
495
496
497static inline unsigned int ip_vs_rs_hashkey(int af,
498 const union nf_inet_addr *addr,
499 __be16 port)
500{
501 register unsigned int porth = ntohs(port);
502 __be32 addr_fold = addr->ip;
503
504#ifdef CONFIG_IP_VS_IPV6
505 if (af == AF_INET6)
506 addr_fold = addr->ip6[0]^addr->ip6[1]^
507 addr->ip6[2]^addr->ip6[3];
508#endif
509
510 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
511 & IP_VS_RTAB_MASK;
512}
513
514
515static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
516{
517 unsigned int hash;
518
519 if (dest->in_rs_table)
520 return;
521
522
523
524
525
526 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
527
528 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
529 dest->in_rs_table = 1;
530}
531
532
533static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
534{
535
536
537
538 if (dest->in_rs_table) {
539 hlist_del_rcu(&dest->d_list);
540 dest->in_rs_table = 0;
541 }
542}
543
544
545bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
546 const union nf_inet_addr *daddr, __be16 dport)
547{
548 unsigned int hash;
549 struct ip_vs_dest *dest;
550
551
552 hash = ip_vs_rs_hashkey(af, daddr, dport);
553
554 rcu_read_lock();
555 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
556 if (dest->port == dport &&
557 dest->af == af &&
558 ip_vs_addr_equal(af, &dest->addr, daddr) &&
559 (dest->protocol == protocol || dest->vfwmark)) {
560
561 rcu_read_unlock();
562 return true;
563 }
564 }
565 rcu_read_unlock();
566
567 return false;
568}
569
570
571
572
573static struct ip_vs_dest *
574ip_vs_lookup_dest(struct ip_vs_service *svc, int dest_af,
575 const union nf_inet_addr *daddr, __be16 dport)
576{
577 struct ip_vs_dest *dest;
578
579
580
581
582 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
583 if ((dest->af == dest_af) &&
584 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
585 (dest->port == dport)) {
586
587 return dest;
588 }
589 }
590
591 return NULL;
592}
593
594
595
596
597
598
599
600
601
602struct ip_vs_dest *ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af,
603 const union nf_inet_addr *daddr,
604 __be16 dport,
605 const union nf_inet_addr *vaddr,
606 __be16 vport, __u16 protocol, __u32 fwmark,
607 __u32 flags)
608{
609 struct ip_vs_dest *dest;
610 struct ip_vs_service *svc;
611 __be16 port = dport;
612
613 svc = ip_vs_service_find(ipvs, svc_af, fwmark, protocol, vaddr, vport);
614 if (!svc)
615 return NULL;
616 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
617 port = 0;
618 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port);
619 if (!dest)
620 dest = ip_vs_lookup_dest(svc, dest_af, daddr, port ^ dport);
621 return dest;
622}
623
624void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
625{
626 struct ip_vs_dest_dst *dest_dst = container_of(head,
627 struct ip_vs_dest_dst,
628 rcu_head);
629
630 dst_release(dest_dst->dst_cache);
631 kfree(dest_dst);
632}
633
634
635static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
636{
637 struct ip_vs_dest_dst *old;
638
639 old = rcu_dereference_protected(dest->dest_dst, 1);
640 if (old) {
641 RCU_INIT_POINTER(dest->dest_dst, NULL);
642 call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
643 }
644}
645
646
647
648
649
650
651
652
653
654
655
656static struct ip_vs_dest *
657ip_vs_trash_get_dest(struct ip_vs_service *svc, int dest_af,
658 const union nf_inet_addr *daddr, __be16 dport)
659{
660 struct ip_vs_dest *dest;
661 struct netns_ipvs *ipvs = svc->ipvs;
662
663
664
665
666 spin_lock_bh(&ipvs->dest_trash_lock);
667 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
668 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
669 "dest->refcnt=%d\n",
670 dest->vfwmark,
671 IP_VS_DBG_ADDR(dest->af, &dest->addr),
672 ntohs(dest->port),
673 atomic_read(&dest->refcnt));
674 if (dest->af == dest_af &&
675 ip_vs_addr_equal(dest_af, &dest->addr, daddr) &&
676 dest->port == dport &&
677 dest->vfwmark == svc->fwmark &&
678 dest->protocol == svc->protocol &&
679 (svc->fwmark ||
680 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
681 dest->vport == svc->port))) {
682
683 list_del(&dest->t_list);
684 ip_vs_dest_hold(dest);
685 goto out;
686 }
687 }
688
689 dest = NULL;
690
691out:
692 spin_unlock_bh(&ipvs->dest_trash_lock);
693
694 return dest;
695}
696
697static void ip_vs_dest_free(struct ip_vs_dest *dest)
698{
699 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
700
701 __ip_vs_dst_cache_reset(dest);
702 __ip_vs_svc_put(svc, false);
703 free_percpu(dest->stats.cpustats);
704 ip_vs_dest_put_and_free(dest);
705}
706
707
708
709
710
711
712
713
714
715
716static void ip_vs_trash_cleanup(struct netns_ipvs *ipvs)
717{
718 struct ip_vs_dest *dest, *nxt;
719
720 del_timer_sync(&ipvs->dest_trash_timer);
721
722 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, t_list) {
723 list_del(&dest->t_list);
724 ip_vs_dest_free(dest);
725 }
726}
727
728static void
729ip_vs_copy_stats(struct ip_vs_kstats *dst, struct ip_vs_stats *src)
730{
731#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->kstats.c - src->kstats0.c
732
733 spin_lock_bh(&src->lock);
734
735 IP_VS_SHOW_STATS_COUNTER(conns);
736 IP_VS_SHOW_STATS_COUNTER(inpkts);
737 IP_VS_SHOW_STATS_COUNTER(outpkts);
738 IP_VS_SHOW_STATS_COUNTER(inbytes);
739 IP_VS_SHOW_STATS_COUNTER(outbytes);
740
741 ip_vs_read_estimator(dst, src);
742
743 spin_unlock_bh(&src->lock);
744}
745
746static void
747ip_vs_export_stats_user(struct ip_vs_stats_user *dst, struct ip_vs_kstats *src)
748{
749 dst->conns = (u32)src->conns;
750 dst->inpkts = (u32)src->inpkts;
751 dst->outpkts = (u32)src->outpkts;
752 dst->inbytes = src->inbytes;
753 dst->outbytes = src->outbytes;
754 dst->cps = (u32)src->cps;
755 dst->inpps = (u32)src->inpps;
756 dst->outpps = (u32)src->outpps;
757 dst->inbps = (u32)src->inbps;
758 dst->outbps = (u32)src->outbps;
759}
760
761static void
762ip_vs_zero_stats(struct ip_vs_stats *stats)
763{
764 spin_lock_bh(&stats->lock);
765
766
767
768#define IP_VS_ZERO_STATS_COUNTER(c) stats->kstats0.c = stats->kstats.c
769
770 IP_VS_ZERO_STATS_COUNTER(conns);
771 IP_VS_ZERO_STATS_COUNTER(inpkts);
772 IP_VS_ZERO_STATS_COUNTER(outpkts);
773 IP_VS_ZERO_STATS_COUNTER(inbytes);
774 IP_VS_ZERO_STATS_COUNTER(outbytes);
775
776 ip_vs_zero_estimator(stats);
777
778 spin_unlock_bh(&stats->lock);
779}
780
781
782
783
784static void
785__ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
786 struct ip_vs_dest_user_kern *udest, int add)
787{
788 struct netns_ipvs *ipvs = svc->ipvs;
789 struct ip_vs_service *old_svc;
790 struct ip_vs_scheduler *sched;
791 int conn_flags;
792
793
794 BUG_ON(!add && udest->af != dest->af);
795
796 if (add && udest->af != svc->af)
797 ipvs->mixed_address_family_dests++;
798
799
800 atomic_set(&dest->weight, udest->weight);
801 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
802 conn_flags |= IP_VS_CONN_F_INACTIVE;
803
804
805 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
806 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
807 } else {
808
809
810
811
812 ip_vs_rs_hash(ipvs, dest);
813 }
814 atomic_set(&dest->conn_flags, conn_flags);
815
816
817 old_svc = rcu_dereference_protected(dest->svc, 1);
818 if (!old_svc) {
819 __ip_vs_bind_svc(dest, svc);
820 } else {
821 if (old_svc != svc) {
822 ip_vs_zero_stats(&dest->stats);
823 __ip_vs_bind_svc(dest, svc);
824 __ip_vs_svc_put(old_svc, true);
825 }
826 }
827
828
829 dest->flags |= IP_VS_DEST_F_AVAILABLE;
830
831 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
832 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
833 dest->u_threshold = udest->u_threshold;
834 dest->l_threshold = udest->l_threshold;
835
836 dest->af = udest->af;
837
838 spin_lock_bh(&dest->dst_lock);
839 __ip_vs_dst_cache_reset(dest);
840 spin_unlock_bh(&dest->dst_lock);
841
842 if (add) {
843 ip_vs_start_estimator(svc->ipvs, &dest->stats);
844 list_add_rcu(&dest->n_list, &svc->destinations);
845 svc->num_dests++;
846 sched = rcu_dereference_protected(svc->scheduler, 1);
847 if (sched && sched->add_dest)
848 sched->add_dest(svc, dest);
849 } else {
850 sched = rcu_dereference_protected(svc->scheduler, 1);
851 if (sched && sched->upd_dest)
852 sched->upd_dest(svc, dest);
853 }
854}
855
856
857
858
859
860static int
861ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
862 struct ip_vs_dest **dest_p)
863{
864 struct ip_vs_dest *dest;
865 unsigned int atype, i;
866
867 EnterFunction(2);
868
869#ifdef CONFIG_IP_VS_IPV6
870 if (udest->af == AF_INET6) {
871 atype = ipv6_addr_type(&udest->addr.in6);
872 if ((!(atype & IPV6_ADDR_UNICAST) ||
873 atype & IPV6_ADDR_LINKLOCAL) &&
874 !__ip_vs_addr_is_local_v6(svc->ipvs->net, &udest->addr.in6))
875 return -EINVAL;
876 } else
877#endif
878 {
879 atype = inet_addr_type(svc->ipvs->net, udest->addr.ip);
880 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
881 return -EINVAL;
882 }
883
884 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
885 if (dest == NULL)
886 return -ENOMEM;
887
888 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
889 if (!dest->stats.cpustats)
890 goto err_alloc;
891
892 for_each_possible_cpu(i) {
893 struct ip_vs_cpu_stats *ip_vs_dest_stats;
894 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
895 u64_stats_init(&ip_vs_dest_stats->syncp);
896 }
897
898 dest->af = udest->af;
899 dest->protocol = svc->protocol;
900 dest->vaddr = svc->addr;
901 dest->vport = svc->port;
902 dest->vfwmark = svc->fwmark;
903 ip_vs_addr_copy(udest->af, &dest->addr, &udest->addr);
904 dest->port = udest->port;
905
906 atomic_set(&dest->activeconns, 0);
907 atomic_set(&dest->inactconns, 0);
908 atomic_set(&dest->persistconns, 0);
909 atomic_set(&dest->refcnt, 1);
910
911 INIT_HLIST_NODE(&dest->d_list);
912 spin_lock_init(&dest->dst_lock);
913 spin_lock_init(&dest->stats.lock);
914 __ip_vs_update_dest(svc, dest, udest, 1);
915
916 *dest_p = dest;
917
918 LeaveFunction(2);
919 return 0;
920
921err_alloc:
922 kfree(dest);
923 return -ENOMEM;
924}
925
926
927
928
929
930static int
931ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
932{
933 struct ip_vs_dest *dest;
934 union nf_inet_addr daddr;
935 __be16 dport = udest->port;
936 int ret;
937
938 EnterFunction(2);
939
940 if (udest->weight < 0) {
941 pr_err("%s(): server weight less than zero\n", __func__);
942 return -ERANGE;
943 }
944
945 if (udest->l_threshold > udest->u_threshold) {
946 pr_err("%s(): lower threshold is higher than upper threshold\n",
947 __func__);
948 return -ERANGE;
949 }
950
951 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
952
953
954 rcu_read_lock();
955 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
956 rcu_read_unlock();
957
958 if (dest != NULL) {
959 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
960 return -EEXIST;
961 }
962
963
964
965
966
967 dest = ip_vs_trash_get_dest(svc, udest->af, &daddr, dport);
968
969 if (dest != NULL) {
970 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
971 "dest->refcnt=%d, service %u/%s:%u\n",
972 IP_VS_DBG_ADDR(udest->af, &daddr), ntohs(dport),
973 atomic_read(&dest->refcnt),
974 dest->vfwmark,
975 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
976 ntohs(dest->vport));
977
978 __ip_vs_update_dest(svc, dest, udest, 1);
979 ret = 0;
980 } else {
981
982
983
984 ret = ip_vs_new_dest(svc, udest, &dest);
985 }
986 LeaveFunction(2);
987
988 return ret;
989}
990
991
992
993
994
995static int
996ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
997{
998 struct ip_vs_dest *dest;
999 union nf_inet_addr daddr;
1000 __be16 dport = udest->port;
1001
1002 EnterFunction(2);
1003
1004 if (udest->weight < 0) {
1005 pr_err("%s(): server weight less than zero\n", __func__);
1006 return -ERANGE;
1007 }
1008
1009 if (udest->l_threshold > udest->u_threshold) {
1010 pr_err("%s(): lower threshold is higher than upper threshold\n",
1011 __func__);
1012 return -ERANGE;
1013 }
1014
1015 ip_vs_addr_copy(udest->af, &daddr, &udest->addr);
1016
1017
1018 rcu_read_lock();
1019 dest = ip_vs_lookup_dest(svc, udest->af, &daddr, dport);
1020 rcu_read_unlock();
1021
1022 if (dest == NULL) {
1023 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1024 return -ENOENT;
1025 }
1026
1027 __ip_vs_update_dest(svc, dest, udest, 0);
1028 LeaveFunction(2);
1029
1030 return 0;
1031}
1032
1033
1034
1035
1036static void __ip_vs_del_dest(struct netns_ipvs *ipvs, struct ip_vs_dest *dest,
1037 bool cleanup)
1038{
1039 ip_vs_stop_estimator(ipvs, &dest->stats);
1040
1041
1042
1043
1044 ip_vs_rs_unhash(dest);
1045
1046 spin_lock_bh(&ipvs->dest_trash_lock);
1047 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1048 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1049 atomic_read(&dest->refcnt));
1050 if (list_empty(&ipvs->dest_trash) && !cleanup)
1051 mod_timer(&ipvs->dest_trash_timer,
1052 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1053
1054 list_add(&dest->t_list, &ipvs->dest_trash);
1055 dest->idle_start = 0;
1056 spin_unlock_bh(&ipvs->dest_trash_lock);
1057 ip_vs_dest_put(dest);
1058}
1059
1060
1061
1062
1063
1064static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1065 struct ip_vs_dest *dest,
1066 int svcupd)
1067{
1068 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1069
1070
1071
1072
1073 list_del_rcu(&dest->n_list);
1074 svc->num_dests--;
1075
1076 if (dest->af != svc->af)
1077 svc->ipvs->mixed_address_family_dests--;
1078
1079 if (svcupd) {
1080 struct ip_vs_scheduler *sched;
1081
1082 sched = rcu_dereference_protected(svc->scheduler, 1);
1083 if (sched && sched->del_dest)
1084 sched->del_dest(svc, dest);
1085 }
1086}
1087
1088
1089
1090
1091
1092static int
1093ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1094{
1095 struct ip_vs_dest *dest;
1096 __be16 dport = udest->port;
1097
1098 EnterFunction(2);
1099
1100
1101 rcu_read_lock();
1102 dest = ip_vs_lookup_dest(svc, udest->af, &udest->addr, dport);
1103 rcu_read_unlock();
1104
1105 if (dest == NULL) {
1106 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1107 return -ENOENT;
1108 }
1109
1110
1111
1112
1113 __ip_vs_unlink_dest(svc, dest, 1);
1114
1115
1116
1117
1118 __ip_vs_del_dest(svc->ipvs, dest, false);
1119
1120 LeaveFunction(2);
1121
1122 return 0;
1123}
1124
1125static void ip_vs_dest_trash_expire(unsigned long data)
1126{
1127 struct netns_ipvs *ipvs = (struct netns_ipvs *)data;
1128 struct ip_vs_dest *dest, *next;
1129 unsigned long now = jiffies;
1130
1131 spin_lock(&ipvs->dest_trash_lock);
1132 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
1133 if (atomic_read(&dest->refcnt) > 0)
1134 continue;
1135 if (dest->idle_start) {
1136 if (time_before(now, dest->idle_start +
1137 IP_VS_DEST_TRASH_PERIOD))
1138 continue;
1139 } else {
1140 dest->idle_start = max(1UL, now);
1141 continue;
1142 }
1143 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1144 dest->vfwmark,
1145 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1146 ntohs(dest->port));
1147 list_del(&dest->t_list);
1148 ip_vs_dest_free(dest);
1149 }
1150 if (!list_empty(&ipvs->dest_trash))
1151 mod_timer(&ipvs->dest_trash_timer,
1152 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
1153 spin_unlock(&ipvs->dest_trash_lock);
1154}
1155
1156
1157
1158
1159static int
1160ip_vs_add_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *u,
1161 struct ip_vs_service **svc_p)
1162{
1163 int ret = 0, i;
1164 struct ip_vs_scheduler *sched = NULL;
1165 struct ip_vs_pe *pe = NULL;
1166 struct ip_vs_service *svc = NULL;
1167
1168
1169 ip_vs_use_count_inc();
1170
1171
1172 if (strcmp(u->sched_name, "none")) {
1173 sched = ip_vs_scheduler_get(u->sched_name);
1174 if (!sched) {
1175 pr_info("Scheduler module ip_vs_%s not found\n",
1176 u->sched_name);
1177 ret = -ENOENT;
1178 goto out_err;
1179 }
1180 }
1181
1182 if (u->pe_name && *u->pe_name) {
1183 pe = ip_vs_pe_getbyname(u->pe_name);
1184 if (pe == NULL) {
1185 pr_info("persistence engine module ip_vs_pe_%s "
1186 "not found\n", u->pe_name);
1187 ret = -ENOENT;
1188 goto out_err;
1189 }
1190 }
1191
1192#ifdef CONFIG_IP_VS_IPV6
1193 if (u->af == AF_INET6) {
1194 __u32 plen = (__force __u32) u->netmask;
1195
1196 if (plen < 1 || plen > 128) {
1197 ret = -EINVAL;
1198 goto out_err;
1199 }
1200 }
1201#endif
1202
1203 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1204 if (svc == NULL) {
1205 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1206 ret = -ENOMEM;
1207 goto out_err;
1208 }
1209 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
1210 if (!svc->stats.cpustats) {
1211 ret = -ENOMEM;
1212 goto out_err;
1213 }
1214
1215 for_each_possible_cpu(i) {
1216 struct ip_vs_cpu_stats *ip_vs_stats;
1217 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1218 u64_stats_init(&ip_vs_stats->syncp);
1219 }
1220
1221
1222
1223 atomic_set(&svc->refcnt, 0);
1224
1225 svc->af = u->af;
1226 svc->protocol = u->protocol;
1227 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1228 svc->port = u->port;
1229 svc->fwmark = u->fwmark;
1230 svc->flags = u->flags;
1231 svc->timeout = u->timeout * HZ;
1232 svc->netmask = u->netmask;
1233 svc->ipvs = ipvs;
1234
1235 INIT_LIST_HEAD(&svc->destinations);
1236 spin_lock_init(&svc->sched_lock);
1237 spin_lock_init(&svc->stats.lock);
1238
1239
1240 if (sched) {
1241 ret = ip_vs_bind_scheduler(svc, sched);
1242 if (ret)
1243 goto out_err;
1244 sched = NULL;
1245 }
1246
1247
1248 RCU_INIT_POINTER(svc->pe, pe);
1249 pe = NULL;
1250
1251
1252 if (svc->port == FTPPORT)
1253 atomic_inc(&ipvs->ftpsvc_counter);
1254 else if (svc->port == 0)
1255 atomic_inc(&ipvs->nullsvc_counter);
1256
1257 ip_vs_start_estimator(ipvs, &svc->stats);
1258
1259
1260 if (svc->af == AF_INET)
1261 ipvs->num_services++;
1262
1263
1264 ip_vs_svc_hash(svc);
1265
1266 *svc_p = svc;
1267
1268 ipvs->enable = 1;
1269 return 0;
1270
1271
1272 out_err:
1273 if (svc != NULL) {
1274 ip_vs_unbind_scheduler(svc, sched);
1275 ip_vs_service_free(svc);
1276 }
1277 ip_vs_scheduler_put(sched);
1278 ip_vs_pe_put(pe);
1279
1280
1281 ip_vs_use_count_dec();
1282
1283 return ret;
1284}
1285
1286
1287
1288
1289
1290static int
1291ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1292{
1293 struct ip_vs_scheduler *sched = NULL, *old_sched;
1294 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1295 int ret = 0;
1296
1297
1298
1299
1300 if (strcmp(u->sched_name, "none")) {
1301 sched = ip_vs_scheduler_get(u->sched_name);
1302 if (!sched) {
1303 pr_info("Scheduler module ip_vs_%s not found\n",
1304 u->sched_name);
1305 return -ENOENT;
1306 }
1307 }
1308 old_sched = sched;
1309
1310 if (u->pe_name && *u->pe_name) {
1311 pe = ip_vs_pe_getbyname(u->pe_name);
1312 if (pe == NULL) {
1313 pr_info("persistence engine module ip_vs_pe_%s "
1314 "not found\n", u->pe_name);
1315 ret = -ENOENT;
1316 goto out;
1317 }
1318 old_pe = pe;
1319 }
1320
1321#ifdef CONFIG_IP_VS_IPV6
1322 if (u->af == AF_INET6) {
1323 __u32 plen = (__force __u32) u->netmask;
1324
1325 if (plen < 1 || plen > 128) {
1326 ret = -EINVAL;
1327 goto out;
1328 }
1329 }
1330#endif
1331
1332 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1333 if (sched != old_sched) {
1334 if (old_sched) {
1335 ip_vs_unbind_scheduler(svc, old_sched);
1336 RCU_INIT_POINTER(svc->scheduler, NULL);
1337
1338 synchronize_rcu();
1339 }
1340
1341 if (sched) {
1342 ret = ip_vs_bind_scheduler(svc, sched);
1343 if (ret) {
1344 ip_vs_scheduler_put(sched);
1345 goto out;
1346 }
1347 }
1348 }
1349
1350
1351
1352
1353 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1354 svc->timeout = u->timeout * HZ;
1355 svc->netmask = u->netmask;
1356
1357 old_pe = rcu_dereference_protected(svc->pe, 1);
1358 if (pe != old_pe)
1359 rcu_assign_pointer(svc->pe, pe);
1360
1361out:
1362 ip_vs_scheduler_put(old_sched);
1363 ip_vs_pe_put(old_pe);
1364 return ret;
1365}
1366
1367
1368
1369
1370
1371
1372static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1373{
1374 struct ip_vs_dest *dest, *nxt;
1375 struct ip_vs_scheduler *old_sched;
1376 struct ip_vs_pe *old_pe;
1377 struct netns_ipvs *ipvs = svc->ipvs;
1378
1379
1380 if (svc->af == AF_INET)
1381 ipvs->num_services--;
1382
1383 ip_vs_stop_estimator(svc->ipvs, &svc->stats);
1384
1385
1386 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1387 ip_vs_unbind_scheduler(svc, old_sched);
1388 ip_vs_scheduler_put(old_sched);
1389
1390
1391 old_pe = rcu_dereference_protected(svc->pe, 1);
1392 ip_vs_pe_put(old_pe);
1393
1394
1395
1396
1397 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1398 __ip_vs_unlink_dest(svc, dest, 0);
1399 __ip_vs_del_dest(svc->ipvs, dest, cleanup);
1400 }
1401
1402
1403
1404
1405 if (svc->port == FTPPORT)
1406 atomic_dec(&ipvs->ftpsvc_counter);
1407 else if (svc->port == 0)
1408 atomic_dec(&ipvs->nullsvc_counter);
1409
1410
1411
1412
1413 __ip_vs_svc_put(svc, true);
1414
1415
1416 ip_vs_use_count_dec();
1417}
1418
1419
1420
1421
1422static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1423{
1424
1425 atomic_inc(&svc->refcnt);
1426
1427
1428
1429 ip_vs_svc_unhash(svc);
1430
1431 __ip_vs_del_service(svc, cleanup);
1432}
1433
1434
1435
1436
1437static int ip_vs_del_service(struct ip_vs_service *svc)
1438{
1439 if (svc == NULL)
1440 return -EEXIST;
1441 ip_vs_unlink_service(svc, false);
1442
1443 return 0;
1444}
1445
1446
1447
1448
1449
1450static int ip_vs_flush(struct netns_ipvs *ipvs, bool cleanup)
1451{
1452 int idx;
1453 struct ip_vs_service *svc;
1454 struct hlist_node *n;
1455
1456
1457
1458
1459 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1460 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1461 s_list) {
1462 if (svc->ipvs == ipvs)
1463 ip_vs_unlink_service(svc, cleanup);
1464 }
1465 }
1466
1467
1468
1469
1470 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1471 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1472 f_list) {
1473 if (svc->ipvs == ipvs)
1474 ip_vs_unlink_service(svc, cleanup);
1475 }
1476 }
1477
1478 return 0;
1479}
1480
1481
1482
1483
1484
1485void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs)
1486{
1487 EnterFunction(2);
1488
1489 mutex_lock(&__ip_vs_mutex);
1490 ip_vs_flush(ipvs, true);
1491 mutex_unlock(&__ip_vs_mutex);
1492 LeaveFunction(2);
1493}
1494
1495
1496static inline void
1497ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
1498{
1499 struct ip_vs_dest_dst *dest_dst;
1500
1501 spin_lock_bh(&dest->dst_lock);
1502 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1503 if (dest_dst && dest_dst->dst_cache->dev == dev) {
1504 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1505 dev->name,
1506 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1507 ntohs(dest->port),
1508 atomic_read(&dest->refcnt));
1509 __ip_vs_dst_cache_reset(dest);
1510 }
1511 spin_unlock_bh(&dest->dst_lock);
1512
1513}
1514
1515
1516
1517static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
1518 void *ptr)
1519{
1520 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1521 struct net *net = dev_net(dev);
1522 struct netns_ipvs *ipvs = net_ipvs(net);
1523 struct ip_vs_service *svc;
1524 struct ip_vs_dest *dest;
1525 unsigned int idx;
1526
1527 if (event != NETDEV_DOWN || !ipvs)
1528 return NOTIFY_DONE;
1529 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1530 EnterFunction(2);
1531 mutex_lock(&__ip_vs_mutex);
1532 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1533 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1534 if (svc->ipvs == ipvs) {
1535 list_for_each_entry(dest, &svc->destinations,
1536 n_list) {
1537 ip_vs_forget_dev(dest, dev);
1538 }
1539 }
1540 }
1541
1542 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1543 if (svc->ipvs == ipvs) {
1544 list_for_each_entry(dest, &svc->destinations,
1545 n_list) {
1546 ip_vs_forget_dev(dest, dev);
1547 }
1548 }
1549
1550 }
1551 }
1552
1553 spin_lock_bh(&ipvs->dest_trash_lock);
1554 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
1555 ip_vs_forget_dev(dest, dev);
1556 }
1557 spin_unlock_bh(&ipvs->dest_trash_lock);
1558 mutex_unlock(&__ip_vs_mutex);
1559 LeaveFunction(2);
1560 return NOTIFY_DONE;
1561}
1562
1563
1564
1565
1566static int ip_vs_zero_service(struct ip_vs_service *svc)
1567{
1568 struct ip_vs_dest *dest;
1569
1570 list_for_each_entry(dest, &svc->destinations, n_list) {
1571 ip_vs_zero_stats(&dest->stats);
1572 }
1573 ip_vs_zero_stats(&svc->stats);
1574 return 0;
1575}
1576
1577static int ip_vs_zero_all(struct netns_ipvs *ipvs)
1578{
1579 int idx;
1580 struct ip_vs_service *svc;
1581
1582 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1583 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
1584 if (svc->ipvs == ipvs)
1585 ip_vs_zero_service(svc);
1586 }
1587 }
1588
1589 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1590 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
1591 if (svc->ipvs == ipvs)
1592 ip_vs_zero_service(svc);
1593 }
1594 }
1595
1596 ip_vs_zero_stats(&ipvs->tot_stats);
1597 return 0;
1598}
1599
1600#ifdef CONFIG_SYSCTL
1601
1602static int zero;
1603static int three = 3;
1604
1605static int
1606proc_do_defense_mode(struct ctl_table *table, int write,
1607 void __user *buffer, size_t *lenp, loff_t *ppos)
1608{
1609 struct netns_ipvs *ipvs = table->extra2;
1610 int *valp = table->data;
1611 int val = *valp;
1612 int rc;
1613
1614 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1615 if (write && (*valp != val)) {
1616 if ((*valp < 0) || (*valp > 3)) {
1617
1618 *valp = val;
1619 } else {
1620 update_defense_level(ipvs);
1621 }
1622 }
1623 return rc;
1624}
1625
1626static int
1627proc_do_sync_threshold(struct ctl_table *table, int write,
1628 void __user *buffer, size_t *lenp, loff_t *ppos)
1629{
1630 int *valp = table->data;
1631 int val[2];
1632 int rc;
1633
1634
1635 memcpy(val, valp, sizeof(val));
1636
1637 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1638 if (write && (valp[0] < 0 || valp[1] < 0 ||
1639 (valp[0] >= valp[1] && valp[1]))) {
1640
1641 memcpy(valp, val, sizeof(val));
1642 }
1643 return rc;
1644}
1645
1646static int
1647proc_do_sync_mode(struct ctl_table *table, int write,
1648 void __user *buffer, size_t *lenp, loff_t *ppos)
1649{
1650 int *valp = table->data;
1651 int val = *valp;
1652 int rc;
1653
1654 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1655 if (write && (*valp != val)) {
1656 if ((*valp < 0) || (*valp > 1)) {
1657
1658 *valp = val;
1659 }
1660 }
1661 return rc;
1662}
1663
1664static int
1665proc_do_sync_ports(struct ctl_table *table, int write,
1666 void __user *buffer, size_t *lenp, loff_t *ppos)
1667{
1668 int *valp = table->data;
1669 int val = *valp;
1670 int rc;
1671
1672 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1673 if (write && (*valp != val)) {
1674 if (*valp < 1 || !is_power_of_2(*valp)) {
1675
1676 *valp = val;
1677 }
1678 }
1679 return rc;
1680}
1681
1682
1683
1684
1685
1686
1687
1688static struct ctl_table vs_vars[] = {
1689 {
1690 .procname = "amemthresh",
1691 .maxlen = sizeof(int),
1692 .mode = 0644,
1693 .proc_handler = proc_dointvec,
1694 },
1695 {
1696 .procname = "am_droprate",
1697 .maxlen = sizeof(int),
1698 .mode = 0644,
1699 .proc_handler = proc_dointvec,
1700 },
1701 {
1702 .procname = "drop_entry",
1703 .maxlen = sizeof(int),
1704 .mode = 0644,
1705 .proc_handler = proc_do_defense_mode,
1706 },
1707 {
1708 .procname = "drop_packet",
1709 .maxlen = sizeof(int),
1710 .mode = 0644,
1711 .proc_handler = proc_do_defense_mode,
1712 },
1713#ifdef CONFIG_IP_VS_NFCT
1714 {
1715 .procname = "conntrack",
1716 .maxlen = sizeof(int),
1717 .mode = 0644,
1718 .proc_handler = &proc_dointvec,
1719 },
1720#endif
1721 {
1722 .procname = "secure_tcp",
1723 .maxlen = sizeof(int),
1724 .mode = 0644,
1725 .proc_handler = proc_do_defense_mode,
1726 },
1727 {
1728 .procname = "snat_reroute",
1729 .maxlen = sizeof(int),
1730 .mode = 0644,
1731 .proc_handler = &proc_dointvec,
1732 },
1733 {
1734 .procname = "sync_version",
1735 .maxlen = sizeof(int),
1736 .mode = 0644,
1737 .proc_handler = &proc_do_sync_mode,
1738 },
1739 {
1740 .procname = "sync_ports",
1741 .maxlen = sizeof(int),
1742 .mode = 0644,
1743 .proc_handler = &proc_do_sync_ports,
1744 },
1745 {
1746 .procname = "sync_persist_mode",
1747 .maxlen = sizeof(int),
1748 .mode = 0644,
1749 .proc_handler = proc_dointvec,
1750 },
1751 {
1752 .procname = "sync_qlen_max",
1753 .maxlen = sizeof(unsigned long),
1754 .mode = 0644,
1755 .proc_handler = proc_doulongvec_minmax,
1756 },
1757 {
1758 .procname = "sync_sock_size",
1759 .maxlen = sizeof(int),
1760 .mode = 0644,
1761 .proc_handler = proc_dointvec,
1762 },
1763 {
1764 .procname = "cache_bypass",
1765 .maxlen = sizeof(int),
1766 .mode = 0644,
1767 .proc_handler = proc_dointvec,
1768 },
1769 {
1770 .procname = "expire_nodest_conn",
1771 .maxlen = sizeof(int),
1772 .mode = 0644,
1773 .proc_handler = proc_dointvec,
1774 },
1775 {
1776 .procname = "sloppy_tcp",
1777 .maxlen = sizeof(int),
1778 .mode = 0644,
1779 .proc_handler = proc_dointvec,
1780 },
1781 {
1782 .procname = "sloppy_sctp",
1783 .maxlen = sizeof(int),
1784 .mode = 0644,
1785 .proc_handler = proc_dointvec,
1786 },
1787 {
1788 .procname = "expire_quiescent_template",
1789 .maxlen = sizeof(int),
1790 .mode = 0644,
1791 .proc_handler = proc_dointvec,
1792 },
1793 {
1794 .procname = "sync_threshold",
1795 .maxlen =
1796 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1797 .mode = 0644,
1798 .proc_handler = proc_do_sync_threshold,
1799 },
1800 {
1801 .procname = "sync_refresh_period",
1802 .maxlen = sizeof(int),
1803 .mode = 0644,
1804 .proc_handler = proc_dointvec_jiffies,
1805 },
1806 {
1807 .procname = "sync_retries",
1808 .maxlen = sizeof(int),
1809 .mode = 0644,
1810 .proc_handler = proc_dointvec_minmax,
1811 .extra1 = &zero,
1812 .extra2 = &three,
1813 },
1814 {
1815 .procname = "nat_icmp_send",
1816 .maxlen = sizeof(int),
1817 .mode = 0644,
1818 .proc_handler = proc_dointvec,
1819 },
1820 {
1821 .procname = "pmtu_disc",
1822 .maxlen = sizeof(int),
1823 .mode = 0644,
1824 .proc_handler = proc_dointvec,
1825 },
1826 {
1827 .procname = "backup_only",
1828 .maxlen = sizeof(int),
1829 .mode = 0644,
1830 .proc_handler = proc_dointvec,
1831 },
1832 {
1833 .procname = "conn_reuse_mode",
1834 .maxlen = sizeof(int),
1835 .mode = 0644,
1836 .proc_handler = proc_dointvec,
1837 },
1838 {
1839 .procname = "schedule_icmp",
1840 .maxlen = sizeof(int),
1841 .mode = 0644,
1842 .proc_handler = proc_dointvec,
1843 },
1844 {
1845 .procname = "ignore_tunneled",
1846 .maxlen = sizeof(int),
1847 .mode = 0644,
1848 .proc_handler = proc_dointvec,
1849 },
1850#ifdef CONFIG_IP_VS_DEBUG
1851 {
1852 .procname = "debug_level",
1853 .data = &sysctl_ip_vs_debug_level,
1854 .maxlen = sizeof(int),
1855 .mode = 0644,
1856 .proc_handler = proc_dointvec,
1857 },
1858#endif
1859 { }
1860};
1861
1862#endif
1863
1864#ifdef CONFIG_PROC_FS
1865
1866struct ip_vs_iter {
1867 struct seq_net_private p;
1868 struct hlist_head *table;
1869 int bucket;
1870};
1871
1872
1873
1874
1875
1876static inline const char *ip_vs_fwd_name(unsigned int flags)
1877{
1878 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1879 case IP_VS_CONN_F_LOCALNODE:
1880 return "Local";
1881 case IP_VS_CONN_F_TUNNEL:
1882 return "Tunnel";
1883 case IP_VS_CONN_F_DROUTE:
1884 return "Route";
1885 default:
1886 return "Masq";
1887 }
1888}
1889
1890
1891
1892static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1893{
1894 struct net *net = seq_file_net(seq);
1895 struct netns_ipvs *ipvs = net_ipvs(net);
1896 struct ip_vs_iter *iter = seq->private;
1897 int idx;
1898 struct ip_vs_service *svc;
1899
1900
1901 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1902 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
1903 if ((svc->ipvs == ipvs) && pos-- == 0) {
1904 iter->table = ip_vs_svc_table;
1905 iter->bucket = idx;
1906 return svc;
1907 }
1908 }
1909 }
1910
1911
1912 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
1913 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1914 f_list) {
1915 if ((svc->ipvs == ipvs) && pos-- == 0) {
1916 iter->table = ip_vs_svc_fwm_table;
1917 iter->bucket = idx;
1918 return svc;
1919 }
1920 }
1921 }
1922
1923 return NULL;
1924}
1925
1926static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
1927 __acquires(RCU)
1928{
1929 rcu_read_lock();
1930 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1931}
1932
1933
1934static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1935{
1936 struct hlist_node *e;
1937 struct ip_vs_iter *iter;
1938 struct ip_vs_service *svc;
1939
1940 ++*pos;
1941 if (v == SEQ_START_TOKEN)
1942 return ip_vs_info_array(seq,0);
1943
1944 svc = v;
1945 iter = seq->private;
1946
1947 if (iter->table == ip_vs_svc_table) {
1948
1949 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1950 if (e)
1951 return hlist_entry(e, struct ip_vs_service, s_list);
1952
1953 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1954 hlist_for_each_entry_rcu(svc,
1955 &ip_vs_svc_table[iter->bucket],
1956 s_list) {
1957 return svc;
1958 }
1959 }
1960
1961 iter->table = ip_vs_svc_fwm_table;
1962 iter->bucket = -1;
1963 goto scan_fwmark;
1964 }
1965
1966
1967 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
1968 if (e)
1969 return hlist_entry(e, struct ip_vs_service, f_list);
1970
1971 scan_fwmark:
1972 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
1973 hlist_for_each_entry_rcu(svc,
1974 &ip_vs_svc_fwm_table[iter->bucket],
1975 f_list)
1976 return svc;
1977 }
1978
1979 return NULL;
1980}
1981
1982static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
1983 __releases(RCU)
1984{
1985 rcu_read_unlock();
1986}
1987
1988
1989static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
1990{
1991 if (v == SEQ_START_TOKEN) {
1992 seq_printf(seq,
1993 "IP Virtual Server version %d.%d.%d (size=%d)\n",
1994 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1995 seq_puts(seq,
1996 "Prot LocalAddress:Port Scheduler Flags\n");
1997 seq_puts(seq,
1998 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
1999 } else {
2000 const struct ip_vs_service *svc = v;
2001 const struct ip_vs_iter *iter = seq->private;
2002 const struct ip_vs_dest *dest;
2003 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
2004 char *sched_name = sched ? sched->name : "none";
2005
2006 if (iter->table == ip_vs_svc_table) {
2007#ifdef CONFIG_IP_VS_IPV6
2008 if (svc->af == AF_INET6)
2009 seq_printf(seq, "%s [%pI6]:%04X %s ",
2010 ip_vs_proto_name(svc->protocol),
2011 &svc->addr.in6,
2012 ntohs(svc->port),
2013 sched_name);
2014 else
2015#endif
2016 seq_printf(seq, "%s %08X:%04X %s %s ",
2017 ip_vs_proto_name(svc->protocol),
2018 ntohl(svc->addr.ip),
2019 ntohs(svc->port),
2020 sched_name,
2021 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2022 } else {
2023 seq_printf(seq, "FWM %08X %s %s",
2024 svc->fwmark, sched_name,
2025 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
2026 }
2027
2028 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2029 seq_printf(seq, "persistent %d %08X\n",
2030 svc->timeout,
2031 ntohl(svc->netmask));
2032 else
2033 seq_putc(seq, '\n');
2034
2035 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
2036#ifdef CONFIG_IP_VS_IPV6
2037 if (dest->af == AF_INET6)
2038 seq_printf(seq,
2039 " -> [%pI6]:%04X"
2040 " %-7s %-6d %-10d %-10d\n",
2041 &dest->addr.in6,
2042 ntohs(dest->port),
2043 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2044 atomic_read(&dest->weight),
2045 atomic_read(&dest->activeconns),
2046 atomic_read(&dest->inactconns));
2047 else
2048#endif
2049 seq_printf(seq,
2050 " -> %08X:%04X "
2051 "%-7s %-6d %-10d %-10d\n",
2052 ntohl(dest->addr.ip),
2053 ntohs(dest->port),
2054 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2055 atomic_read(&dest->weight),
2056 atomic_read(&dest->activeconns),
2057 atomic_read(&dest->inactconns));
2058
2059 }
2060 }
2061 return 0;
2062}
2063
2064static const struct seq_operations ip_vs_info_seq_ops = {
2065 .start = ip_vs_info_seq_start,
2066 .next = ip_vs_info_seq_next,
2067 .stop = ip_vs_info_seq_stop,
2068 .show = ip_vs_info_seq_show,
2069};
2070
2071static int ip_vs_info_open(struct inode *inode, struct file *file)
2072{
2073 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
2074 sizeof(struct ip_vs_iter));
2075}
2076
2077static const struct file_operations ip_vs_info_fops = {
2078 .owner = THIS_MODULE,
2079 .open = ip_vs_info_open,
2080 .read = seq_read,
2081 .llseek = seq_lseek,
2082 .release = seq_release_net,
2083};
2084
2085static int ip_vs_stats_show(struct seq_file *seq, void *v)
2086{
2087 struct net *net = seq_file_single_net(seq);
2088 struct ip_vs_kstats show;
2089
2090
2091 seq_puts(seq,
2092 " Total Incoming Outgoing Incoming Outgoing\n");
2093 seq_printf(seq,
2094 " Conns Packets Packets Bytes Bytes\n");
2095
2096 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2097 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n\n",
2098 (unsigned long long)show.conns,
2099 (unsigned long long)show.inpkts,
2100 (unsigned long long)show.outpkts,
2101 (unsigned long long)show.inbytes,
2102 (unsigned long long)show.outbytes);
2103
2104
2105 seq_puts(seq,
2106 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2107 seq_printf(seq, "%8LX %8LX %8LX %16LX %16LX\n",
2108 (unsigned long long)show.cps,
2109 (unsigned long long)show.inpps,
2110 (unsigned long long)show.outpps,
2111 (unsigned long long)show.inbps,
2112 (unsigned long long)show.outbps);
2113
2114 return 0;
2115}
2116
2117static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2118{
2119 return single_open_net(inode, file, ip_vs_stats_show);
2120}
2121
2122static const struct file_operations ip_vs_stats_fops = {
2123 .owner = THIS_MODULE,
2124 .open = ip_vs_stats_seq_open,
2125 .read = seq_read,
2126 .llseek = seq_lseek,
2127 .release = single_release_net,
2128};
2129
2130static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2131{
2132 struct net *net = seq_file_single_net(seq);
2133 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
2134 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
2135 struct ip_vs_kstats kstats;
2136 int i;
2137
2138
2139 seq_puts(seq,
2140 " Total Incoming Outgoing Incoming Outgoing\n");
2141 seq_printf(seq,
2142 "CPU Conns Packets Packets Bytes Bytes\n");
2143
2144 for_each_possible_cpu(i) {
2145 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2146 unsigned int start;
2147 u64 conns, inpkts, outpkts, inbytes, outbytes;
2148
2149 do {
2150 start = u64_stats_fetch_begin_irq(&u->syncp);
2151 conns = u->cnt.conns;
2152 inpkts = u->cnt.inpkts;
2153 outpkts = u->cnt.outpkts;
2154 inbytes = u->cnt.inbytes;
2155 outbytes = u->cnt.outbytes;
2156 } while (u64_stats_fetch_retry_irq(&u->syncp, start));
2157
2158 seq_printf(seq, "%3X %8LX %8LX %8LX %16LX %16LX\n",
2159 i, (u64)conns, (u64)inpkts,
2160 (u64)outpkts, (u64)inbytes,
2161 (u64)outbytes);
2162 }
2163
2164 ip_vs_copy_stats(&kstats, tot_stats);
2165
2166 seq_printf(seq, " ~ %8LX %8LX %8LX %16LX %16LX\n\n",
2167 (unsigned long long)kstats.conns,
2168 (unsigned long long)kstats.inpkts,
2169 (unsigned long long)kstats.outpkts,
2170 (unsigned long long)kstats.inbytes,
2171 (unsigned long long)kstats.outbytes);
2172
2173
2174 seq_puts(seq,
2175 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2176 seq_printf(seq, " %8LX %8LX %8LX %16LX %16LX\n",
2177 kstats.cps,
2178 kstats.inpps,
2179 kstats.outpps,
2180 kstats.inbps,
2181 kstats.outbps);
2182
2183 return 0;
2184}
2185
2186static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2187{
2188 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2189}
2190
2191static const struct file_operations ip_vs_stats_percpu_fops = {
2192 .owner = THIS_MODULE,
2193 .open = ip_vs_stats_percpu_seq_open,
2194 .read = seq_read,
2195 .llseek = seq_lseek,
2196 .release = single_release_net,
2197};
2198#endif
2199
2200
2201
2202
2203static int ip_vs_set_timeout(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2204{
2205#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2206 struct ip_vs_proto_data *pd;
2207#endif
2208
2209 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2210 u->tcp_timeout,
2211 u->tcp_fin_timeout,
2212 u->udp_timeout);
2213
2214#ifdef CONFIG_IP_VS_PROTO_TCP
2215 if (u->tcp_timeout) {
2216 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2217 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
2218 = u->tcp_timeout * HZ;
2219 }
2220
2221 if (u->tcp_fin_timeout) {
2222 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2223 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
2224 = u->tcp_fin_timeout * HZ;
2225 }
2226#endif
2227
2228#ifdef CONFIG_IP_VS_PROTO_UDP
2229 if (u->udp_timeout) {
2230 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2231 pd->timeout_table[IP_VS_UDP_S_NORMAL]
2232 = u->udp_timeout * HZ;
2233 }
2234#endif
2235 return 0;
2236}
2237
2238#define CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2239
2240struct ip_vs_svcdest_user {
2241 struct ip_vs_service_user s;
2242 struct ip_vs_dest_user d;
2243};
2244
2245static const unsigned char set_arglen[CMDID(IP_VS_SO_SET_MAX) + 1] = {
2246 [CMDID(IP_VS_SO_SET_ADD)] = sizeof(struct ip_vs_service_user),
2247 [CMDID(IP_VS_SO_SET_EDIT)] = sizeof(struct ip_vs_service_user),
2248 [CMDID(IP_VS_SO_SET_DEL)] = sizeof(struct ip_vs_service_user),
2249 [CMDID(IP_VS_SO_SET_ADDDEST)] = sizeof(struct ip_vs_svcdest_user),
2250 [CMDID(IP_VS_SO_SET_DELDEST)] = sizeof(struct ip_vs_svcdest_user),
2251 [CMDID(IP_VS_SO_SET_EDITDEST)] = sizeof(struct ip_vs_svcdest_user),
2252 [CMDID(IP_VS_SO_SET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2253 [CMDID(IP_VS_SO_SET_STARTDAEMON)] = sizeof(struct ip_vs_daemon_user),
2254 [CMDID(IP_VS_SO_SET_STOPDAEMON)] = sizeof(struct ip_vs_daemon_user),
2255 [CMDID(IP_VS_SO_SET_ZERO)] = sizeof(struct ip_vs_service_user),
2256};
2257
2258union ip_vs_set_arglen {
2259 struct ip_vs_service_user field_IP_VS_SO_SET_ADD;
2260 struct ip_vs_service_user field_IP_VS_SO_SET_EDIT;
2261 struct ip_vs_service_user field_IP_VS_SO_SET_DEL;
2262 struct ip_vs_svcdest_user field_IP_VS_SO_SET_ADDDEST;
2263 struct ip_vs_svcdest_user field_IP_VS_SO_SET_DELDEST;
2264 struct ip_vs_svcdest_user field_IP_VS_SO_SET_EDITDEST;
2265 struct ip_vs_timeout_user field_IP_VS_SO_SET_TIMEOUT;
2266 struct ip_vs_daemon_user field_IP_VS_SO_SET_STARTDAEMON;
2267 struct ip_vs_daemon_user field_IP_VS_SO_SET_STOPDAEMON;
2268 struct ip_vs_service_user field_IP_VS_SO_SET_ZERO;
2269};
2270
2271#define MAX_SET_ARGLEN sizeof(union ip_vs_set_arglen)
2272
2273static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2274 struct ip_vs_service_user *usvc_compat)
2275{
2276 memset(usvc, 0, sizeof(*usvc));
2277
2278 usvc->af = AF_INET;
2279 usvc->protocol = usvc_compat->protocol;
2280 usvc->addr.ip = usvc_compat->addr;
2281 usvc->port = usvc_compat->port;
2282 usvc->fwmark = usvc_compat->fwmark;
2283
2284
2285 usvc->sched_name = usvc_compat->sched_name;
2286
2287 usvc->flags = usvc_compat->flags;
2288 usvc->timeout = usvc_compat->timeout;
2289 usvc->netmask = usvc_compat->netmask;
2290}
2291
2292static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2293 struct ip_vs_dest_user *udest_compat)
2294{
2295 memset(udest, 0, sizeof(*udest));
2296
2297 udest->addr.ip = udest_compat->addr;
2298 udest->port = udest_compat->port;
2299 udest->conn_flags = udest_compat->conn_flags;
2300 udest->weight = udest_compat->weight;
2301 udest->u_threshold = udest_compat->u_threshold;
2302 udest->l_threshold = udest_compat->l_threshold;
2303 udest->af = AF_INET;
2304}
2305
2306static int
2307do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2308{
2309 struct net *net = sock_net(sk);
2310 int ret;
2311 unsigned char arg[MAX_SET_ARGLEN];
2312 struct ip_vs_service_user *usvc_compat;
2313 struct ip_vs_service_user_kern usvc;
2314 struct ip_vs_service *svc;
2315 struct ip_vs_dest_user *udest_compat;
2316 struct ip_vs_dest_user_kern udest;
2317 struct netns_ipvs *ipvs = net_ipvs(net);
2318
2319 BUILD_BUG_ON(sizeof(arg) > 255);
2320 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2321 return -EPERM;
2322
2323 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2324 return -EINVAL;
2325 if (len != set_arglen[CMDID(cmd)]) {
2326 IP_VS_DBG(1, "set_ctl: len %u != %u\n",
2327 len, set_arglen[CMDID(cmd)]);
2328 return -EINVAL;
2329 }
2330
2331 if (copy_from_user(arg, user, len) != 0)
2332 return -EFAULT;
2333
2334
2335 ip_vs_use_count_inc();
2336
2337
2338 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2339 cmd == IP_VS_SO_SET_STOPDAEMON) {
2340 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2341
2342 if (cmd == IP_VS_SO_SET_STARTDAEMON) {
2343 struct ipvs_sync_daemon_cfg cfg;
2344
2345 memset(&cfg, 0, sizeof(cfg));
2346 strlcpy(cfg.mcast_ifn, dm->mcast_ifn,
2347 sizeof(cfg.mcast_ifn));
2348 cfg.syncid = dm->syncid;
2349 rtnl_lock();
2350 mutex_lock(&ipvs->sync_mutex);
2351 ret = start_sync_thread(ipvs, &cfg, dm->state);
2352 mutex_unlock(&ipvs->sync_mutex);
2353 rtnl_unlock();
2354 } else {
2355 mutex_lock(&ipvs->sync_mutex);
2356 ret = stop_sync_thread(ipvs, dm->state);
2357 mutex_unlock(&ipvs->sync_mutex);
2358 }
2359 goto out_dec;
2360 }
2361
2362 mutex_lock(&__ip_vs_mutex);
2363 if (cmd == IP_VS_SO_SET_FLUSH) {
2364
2365 ret = ip_vs_flush(ipvs, false);
2366 goto out_unlock;
2367 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2368
2369 ret = ip_vs_set_timeout(ipvs, (struct ip_vs_timeout_user *)arg);
2370 goto out_unlock;
2371 }
2372
2373 usvc_compat = (struct ip_vs_service_user *)arg;
2374 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2375
2376
2377
2378 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2379 ip_vs_copy_udest_compat(&udest, udest_compat);
2380
2381 if (cmd == IP_VS_SO_SET_ZERO) {
2382
2383 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
2384 ret = ip_vs_zero_all(ipvs);
2385 goto out_unlock;
2386 }
2387 }
2388
2389
2390 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2391 usvc.protocol != IPPROTO_SCTP) {
2392 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2393 usvc.protocol, &usvc.addr.ip,
2394 ntohs(usvc.port), usvc.sched_name);
2395 ret = -EFAULT;
2396 goto out_unlock;
2397 }
2398
2399
2400 rcu_read_lock();
2401 if (usvc.fwmark == 0)
2402 svc = __ip_vs_service_find(ipvs, usvc.af, usvc.protocol,
2403 &usvc.addr, usvc.port);
2404 else
2405 svc = __ip_vs_svc_fwm_find(ipvs, usvc.af, usvc.fwmark);
2406 rcu_read_unlock();
2407
2408 if (cmd != IP_VS_SO_SET_ADD
2409 && (svc == NULL || svc->protocol != usvc.protocol)) {
2410 ret = -ESRCH;
2411 goto out_unlock;
2412 }
2413
2414 switch (cmd) {
2415 case IP_VS_SO_SET_ADD:
2416 if (svc != NULL)
2417 ret = -EEXIST;
2418 else
2419 ret = ip_vs_add_service(ipvs, &usvc, &svc);
2420 break;
2421 case IP_VS_SO_SET_EDIT:
2422 ret = ip_vs_edit_service(svc, &usvc);
2423 break;
2424 case IP_VS_SO_SET_DEL:
2425 ret = ip_vs_del_service(svc);
2426 if (!ret)
2427 goto out_unlock;
2428 break;
2429 case IP_VS_SO_SET_ZERO:
2430 ret = ip_vs_zero_service(svc);
2431 break;
2432 case IP_VS_SO_SET_ADDDEST:
2433 ret = ip_vs_add_dest(svc, &udest);
2434 break;
2435 case IP_VS_SO_SET_EDITDEST:
2436 ret = ip_vs_edit_dest(svc, &udest);
2437 break;
2438 case IP_VS_SO_SET_DELDEST:
2439 ret = ip_vs_del_dest(svc, &udest);
2440 break;
2441 default:
2442 ret = -EINVAL;
2443 }
2444
2445 out_unlock:
2446 mutex_unlock(&__ip_vs_mutex);
2447 out_dec:
2448
2449 ip_vs_use_count_dec();
2450
2451 return ret;
2452}
2453
2454
2455static void
2456ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2457{
2458 struct ip_vs_scheduler *sched;
2459 struct ip_vs_kstats kstats;
2460 char *sched_name;
2461
2462 sched = rcu_dereference_protected(src->scheduler, 1);
2463 sched_name = sched ? sched->name : "none";
2464 dst->protocol = src->protocol;
2465 dst->addr = src->addr.ip;
2466 dst->port = src->port;
2467 dst->fwmark = src->fwmark;
2468 strlcpy(dst->sched_name, sched_name, sizeof(dst->sched_name));
2469 dst->flags = src->flags;
2470 dst->timeout = src->timeout / HZ;
2471 dst->netmask = src->netmask;
2472 dst->num_dests = src->num_dests;
2473 ip_vs_copy_stats(&kstats, &src->stats);
2474 ip_vs_export_stats_user(&dst->stats, &kstats);
2475}
2476
2477static inline int
2478__ip_vs_get_service_entries(struct netns_ipvs *ipvs,
2479 const struct ip_vs_get_services *get,
2480 struct ip_vs_get_services __user *uptr)
2481{
2482 int idx, count=0;
2483 struct ip_vs_service *svc;
2484 struct ip_vs_service_entry entry;
2485 int ret = 0;
2486
2487 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2488 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
2489
2490 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2491 continue;
2492
2493 if (count >= get->num_services)
2494 goto out;
2495 memset(&entry, 0, sizeof(entry));
2496 ip_vs_copy_service(&entry, svc);
2497 if (copy_to_user(&uptr->entrytable[count],
2498 &entry, sizeof(entry))) {
2499 ret = -EFAULT;
2500 goto out;
2501 }
2502 count++;
2503 }
2504 }
2505
2506 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
2507 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
2508
2509 if (svc->af != AF_INET || (svc->ipvs != ipvs))
2510 continue;
2511
2512 if (count >= get->num_services)
2513 goto out;
2514 memset(&entry, 0, sizeof(entry));
2515 ip_vs_copy_service(&entry, svc);
2516 if (copy_to_user(&uptr->entrytable[count],
2517 &entry, sizeof(entry))) {
2518 ret = -EFAULT;
2519 goto out;
2520 }
2521 count++;
2522 }
2523 }
2524out:
2525 return ret;
2526}
2527
2528static inline int
2529__ip_vs_get_dest_entries(struct netns_ipvs *ipvs, const struct ip_vs_get_dests *get,
2530 struct ip_vs_get_dests __user *uptr)
2531{
2532 struct ip_vs_service *svc;
2533 union nf_inet_addr addr = { .ip = get->addr };
2534 int ret = 0;
2535
2536 rcu_read_lock();
2537 if (get->fwmark)
2538 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, get->fwmark);
2539 else
2540 svc = __ip_vs_service_find(ipvs, AF_INET, get->protocol, &addr,
2541 get->port);
2542 rcu_read_unlock();
2543
2544 if (svc) {
2545 int count = 0;
2546 struct ip_vs_dest *dest;
2547 struct ip_vs_dest_entry entry;
2548 struct ip_vs_kstats kstats;
2549
2550 memset(&entry, 0, sizeof(entry));
2551 list_for_each_entry(dest, &svc->destinations, n_list) {
2552 if (count >= get->num_dests)
2553 break;
2554
2555
2556
2557
2558 if (dest->af != svc->af)
2559 continue;
2560
2561 entry.addr = dest->addr.ip;
2562 entry.port = dest->port;
2563 entry.conn_flags = atomic_read(&dest->conn_flags);
2564 entry.weight = atomic_read(&dest->weight);
2565 entry.u_threshold = dest->u_threshold;
2566 entry.l_threshold = dest->l_threshold;
2567 entry.activeconns = atomic_read(&dest->activeconns);
2568 entry.inactconns = atomic_read(&dest->inactconns);
2569 entry.persistconns = atomic_read(&dest->persistconns);
2570 ip_vs_copy_stats(&kstats, &dest->stats);
2571 ip_vs_export_stats_user(&entry.stats, &kstats);
2572 if (copy_to_user(&uptr->entrytable[count],
2573 &entry, sizeof(entry))) {
2574 ret = -EFAULT;
2575 break;
2576 }
2577 count++;
2578 }
2579 } else
2580 ret = -ESRCH;
2581 return ret;
2582}
2583
2584static inline void
2585__ip_vs_get_timeouts(struct netns_ipvs *ipvs, struct ip_vs_timeout_user *u)
2586{
2587#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
2588 struct ip_vs_proto_data *pd;
2589#endif
2590
2591 memset(u, 0, sizeof (*u));
2592
2593#ifdef CONFIG_IP_VS_PROTO_TCP
2594 pd = ip_vs_proto_data_get(ipvs, IPPROTO_TCP);
2595 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2596 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
2597#endif
2598#ifdef CONFIG_IP_VS_PROTO_UDP
2599 pd = ip_vs_proto_data_get(ipvs, IPPROTO_UDP);
2600 u->udp_timeout =
2601 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
2602#endif
2603}
2604
2605static const unsigned char get_arglen[CMDID(IP_VS_SO_GET_MAX) + 1] = {
2606 [CMDID(IP_VS_SO_GET_VERSION)] = 64,
2607 [CMDID(IP_VS_SO_GET_INFO)] = sizeof(struct ip_vs_getinfo),
2608 [CMDID(IP_VS_SO_GET_SERVICES)] = sizeof(struct ip_vs_get_services),
2609 [CMDID(IP_VS_SO_GET_SERVICE)] = sizeof(struct ip_vs_service_entry),
2610 [CMDID(IP_VS_SO_GET_DESTS)] = sizeof(struct ip_vs_get_dests),
2611 [CMDID(IP_VS_SO_GET_TIMEOUT)] = sizeof(struct ip_vs_timeout_user),
2612 [CMDID(IP_VS_SO_GET_DAEMON)] = 2 * sizeof(struct ip_vs_daemon_user),
2613};
2614
2615union ip_vs_get_arglen {
2616 char field_IP_VS_SO_GET_VERSION[64];
2617 struct ip_vs_getinfo field_IP_VS_SO_GET_INFO;
2618 struct ip_vs_get_services field_IP_VS_SO_GET_SERVICES;
2619 struct ip_vs_service_entry field_IP_VS_SO_GET_SERVICE;
2620 struct ip_vs_get_dests field_IP_VS_SO_GET_DESTS;
2621 struct ip_vs_timeout_user field_IP_VS_SO_GET_TIMEOUT;
2622 struct ip_vs_daemon_user field_IP_VS_SO_GET_DAEMON[2];
2623};
2624
2625#define MAX_GET_ARGLEN sizeof(union ip_vs_get_arglen)
2626
2627static int
2628do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2629{
2630 unsigned char arg[MAX_GET_ARGLEN];
2631 int ret = 0;
2632 unsigned int copylen;
2633 struct net *net = sock_net(sk);
2634 struct netns_ipvs *ipvs = net_ipvs(net);
2635
2636 BUG_ON(!net);
2637 BUILD_BUG_ON(sizeof(arg) > 255);
2638 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
2639 return -EPERM;
2640
2641 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2642 return -EINVAL;
2643
2644 copylen = get_arglen[CMDID(cmd)];
2645 if (*len < (int) copylen) {
2646 IP_VS_DBG(1, "get_ctl: len %d < %u\n", *len, copylen);
2647 return -EINVAL;
2648 }
2649
2650 if (copy_from_user(arg, user, copylen) != 0)
2651 return -EFAULT;
2652
2653
2654
2655 if (cmd == IP_VS_SO_GET_DAEMON) {
2656 struct ip_vs_daemon_user d[2];
2657
2658 memset(&d, 0, sizeof(d));
2659 mutex_lock(&ipvs->sync_mutex);
2660 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2661 d[0].state = IP_VS_STATE_MASTER;
2662 strlcpy(d[0].mcast_ifn, ipvs->mcfg.mcast_ifn,
2663 sizeof(d[0].mcast_ifn));
2664 d[0].syncid = ipvs->mcfg.syncid;
2665 }
2666 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2667 d[1].state = IP_VS_STATE_BACKUP;
2668 strlcpy(d[1].mcast_ifn, ipvs->bcfg.mcast_ifn,
2669 sizeof(d[1].mcast_ifn));
2670 d[1].syncid = ipvs->bcfg.syncid;
2671 }
2672 if (copy_to_user(user, &d, sizeof(d)) != 0)
2673 ret = -EFAULT;
2674 mutex_unlock(&ipvs->sync_mutex);
2675 return ret;
2676 }
2677
2678 mutex_lock(&__ip_vs_mutex);
2679 switch (cmd) {
2680 case IP_VS_SO_GET_VERSION:
2681 {
2682 char buf[64];
2683
2684 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
2685 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
2686 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2687 ret = -EFAULT;
2688 goto out;
2689 }
2690 *len = strlen(buf)+1;
2691 }
2692 break;
2693
2694 case IP_VS_SO_GET_INFO:
2695 {
2696 struct ip_vs_getinfo info;
2697 info.version = IP_VS_VERSION_CODE;
2698 info.size = ip_vs_conn_tab_size;
2699 info.num_services = ipvs->num_services;
2700 if (copy_to_user(user, &info, sizeof(info)) != 0)
2701 ret = -EFAULT;
2702 }
2703 break;
2704
2705 case IP_VS_SO_GET_SERVICES:
2706 {
2707 struct ip_vs_get_services *get;
2708 int size;
2709
2710 get = (struct ip_vs_get_services *)arg;
2711 size = sizeof(*get) +
2712 sizeof(struct ip_vs_service_entry) * get->num_services;
2713 if (*len != size) {
2714 pr_err("length: %u != %u\n", *len, size);
2715 ret = -EINVAL;
2716 goto out;
2717 }
2718 ret = __ip_vs_get_service_entries(ipvs, get, user);
2719 }
2720 break;
2721
2722 case IP_VS_SO_GET_SERVICE:
2723 {
2724 struct ip_vs_service_entry *entry;
2725 struct ip_vs_service *svc;
2726 union nf_inet_addr addr;
2727
2728 entry = (struct ip_vs_service_entry *)arg;
2729 addr.ip = entry->addr;
2730 rcu_read_lock();
2731 if (entry->fwmark)
2732 svc = __ip_vs_svc_fwm_find(ipvs, AF_INET, entry->fwmark);
2733 else
2734 svc = __ip_vs_service_find(ipvs, AF_INET,
2735 entry->protocol, &addr,
2736 entry->port);
2737 rcu_read_unlock();
2738 if (svc) {
2739 ip_vs_copy_service(entry, svc);
2740 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2741 ret = -EFAULT;
2742 } else
2743 ret = -ESRCH;
2744 }
2745 break;
2746
2747 case IP_VS_SO_GET_DESTS:
2748 {
2749 struct ip_vs_get_dests *get;
2750 int size;
2751
2752 get = (struct ip_vs_get_dests *)arg;
2753 size = sizeof(*get) +
2754 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2755 if (*len != size) {
2756 pr_err("length: %u != %u\n", *len, size);
2757 ret = -EINVAL;
2758 goto out;
2759 }
2760 ret = __ip_vs_get_dest_entries(ipvs, get, user);
2761 }
2762 break;
2763
2764 case IP_VS_SO_GET_TIMEOUT:
2765 {
2766 struct ip_vs_timeout_user t;
2767
2768 __ip_vs_get_timeouts(ipvs, &t);
2769 if (copy_to_user(user, &t, sizeof(t)) != 0)
2770 ret = -EFAULT;
2771 }
2772 break;
2773
2774 default:
2775 ret = -EINVAL;
2776 }
2777
2778out:
2779 mutex_unlock(&__ip_vs_mutex);
2780 return ret;
2781}
2782
2783
2784static struct nf_sockopt_ops ip_vs_sockopts = {
2785 .pf = PF_INET,
2786 .set_optmin = IP_VS_BASE_CTL,
2787 .set_optmax = IP_VS_SO_SET_MAX+1,
2788 .set = do_ip_vs_set_ctl,
2789 .get_optmin = IP_VS_BASE_CTL,
2790 .get_optmax = IP_VS_SO_GET_MAX+1,
2791 .get = do_ip_vs_get_ctl,
2792 .owner = THIS_MODULE,
2793};
2794
2795
2796
2797
2798
2799
2800static struct genl_family ip_vs_genl_family = {
2801 .id = GENL_ID_GENERATE,
2802 .hdrsize = 0,
2803 .name = IPVS_GENL_NAME,
2804 .version = IPVS_GENL_VERSION,
2805 .maxattr = IPVS_CMD_MAX,
2806 .netnsok = true,
2807};
2808
2809
2810static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2811 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2812 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2813 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2814 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2815 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2816 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2817};
2818
2819
2820static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2821 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2822 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2823 .len = IP_VS_IFNAME_MAXLEN },
2824 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2825 [IPVS_DAEMON_ATTR_SYNC_MAXLEN] = { .type = NLA_U16 },
2826 [IPVS_DAEMON_ATTR_MCAST_GROUP] = { .type = NLA_U32 },
2827 [IPVS_DAEMON_ATTR_MCAST_GROUP6] = { .len = sizeof(struct in6_addr) },
2828 [IPVS_DAEMON_ATTR_MCAST_PORT] = { .type = NLA_U16 },
2829 [IPVS_DAEMON_ATTR_MCAST_TTL] = { .type = NLA_U8 },
2830};
2831
2832
2833static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2834 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2835 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2836 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2837 .len = sizeof(union nf_inet_addr) },
2838 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2839 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2840 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2841 .len = IP_VS_SCHEDNAME_MAXLEN },
2842 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2843 .len = IP_VS_PENAME_MAXLEN },
2844 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2845 .len = sizeof(struct ip_vs_flags) },
2846 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2847 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2848 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2849};
2850
2851
2852static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2853 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2854 .len = sizeof(union nf_inet_addr) },
2855 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2856 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2857 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2858 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2859 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2860 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2861 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2862 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2863 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2864 [IPVS_DEST_ATTR_ADDR_FAMILY] = { .type = NLA_U16 },
2865};
2866
2867static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2868 struct ip_vs_kstats *kstats)
2869{
2870 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2871
2872 if (!nl_stats)
2873 return -EMSGSIZE;
2874
2875 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, (u32)kstats->conns) ||
2876 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, (u32)kstats->inpkts) ||
2877 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, (u32)kstats->outpkts) ||
2878 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes) ||
2879 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes) ||
2880 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, (u32)kstats->cps) ||
2881 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, (u32)kstats->inpps) ||
2882 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, (u32)kstats->outpps) ||
2883 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, (u32)kstats->inbps) ||
2884 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, (u32)kstats->outbps))
2885 goto nla_put_failure;
2886 nla_nest_end(skb, nl_stats);
2887
2888 return 0;
2889
2890nla_put_failure:
2891 nla_nest_cancel(skb, nl_stats);
2892 return -EMSGSIZE;
2893}
2894
2895static int ip_vs_genl_fill_stats64(struct sk_buff *skb, int container_type,
2896 struct ip_vs_kstats *kstats)
2897{
2898 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2899
2900 if (!nl_stats)
2901 return -EMSGSIZE;
2902
2903 if (nla_put_u64(skb, IPVS_STATS_ATTR_CONNS, kstats->conns) ||
2904 nla_put_u64(skb, IPVS_STATS_ATTR_INPKTS, kstats->inpkts) ||
2905 nla_put_u64(skb, IPVS_STATS_ATTR_OUTPKTS, kstats->outpkts) ||
2906 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, kstats->inbytes) ||
2907 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, kstats->outbytes) ||
2908 nla_put_u64(skb, IPVS_STATS_ATTR_CPS, kstats->cps) ||
2909 nla_put_u64(skb, IPVS_STATS_ATTR_INPPS, kstats->inpps) ||
2910 nla_put_u64(skb, IPVS_STATS_ATTR_OUTPPS, kstats->outpps) ||
2911 nla_put_u64(skb, IPVS_STATS_ATTR_INBPS, kstats->inbps) ||
2912 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBPS, kstats->outbps))
2913 goto nla_put_failure;
2914 nla_nest_end(skb, nl_stats);
2915
2916 return 0;
2917
2918nla_put_failure:
2919 nla_nest_cancel(skb, nl_stats);
2920 return -EMSGSIZE;
2921}
2922
2923static int ip_vs_genl_fill_service(struct sk_buff *skb,
2924 struct ip_vs_service *svc)
2925{
2926 struct ip_vs_scheduler *sched;
2927 struct ip_vs_pe *pe;
2928 struct nlattr *nl_service;
2929 struct ip_vs_flags flags = { .flags = svc->flags,
2930 .mask = ~0 };
2931 struct ip_vs_kstats kstats;
2932 char *sched_name;
2933
2934 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2935 if (!nl_service)
2936 return -EMSGSIZE;
2937
2938 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2939 goto nla_put_failure;
2940 if (svc->fwmark) {
2941 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2942 goto nla_put_failure;
2943 } else {
2944 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2945 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
2946 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
2947 goto nla_put_failure;
2948 }
2949
2950 sched = rcu_dereference_protected(svc->scheduler, 1);
2951 sched_name = sched ? sched->name : "none";
2952 pe = rcu_dereference_protected(svc->pe, 1);
2953 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched_name) ||
2954 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
2955 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2956 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
2957 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
2958 goto nla_put_failure;
2959 ip_vs_copy_stats(&kstats, &svc->stats);
2960 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &kstats))
2961 goto nla_put_failure;
2962 if (ip_vs_genl_fill_stats64(skb, IPVS_SVC_ATTR_STATS64, &kstats))
2963 goto nla_put_failure;
2964
2965 nla_nest_end(skb, nl_service);
2966
2967 return 0;
2968
2969nla_put_failure:
2970 nla_nest_cancel(skb, nl_service);
2971 return -EMSGSIZE;
2972}
2973
2974static int ip_vs_genl_dump_service(struct sk_buff *skb,
2975 struct ip_vs_service *svc,
2976 struct netlink_callback *cb)
2977{
2978 void *hdr;
2979
2980 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2981 &ip_vs_genl_family, NLM_F_MULTI,
2982 IPVS_CMD_NEW_SERVICE);
2983 if (!hdr)
2984 return -EMSGSIZE;
2985
2986 if (ip_vs_genl_fill_service(skb, svc) < 0)
2987 goto nla_put_failure;
2988
2989 genlmsg_end(skb, hdr);
2990 return 0;
2991
2992nla_put_failure:
2993 genlmsg_cancel(skb, hdr);
2994 return -EMSGSIZE;
2995}
2996
2997static int ip_vs_genl_dump_services(struct sk_buff *skb,
2998 struct netlink_callback *cb)
2999{
3000 int idx = 0, i;
3001 int start = cb->args[0];
3002 struct ip_vs_service *svc;
3003 struct net *net = sock_net(skb->sk);
3004 struct netns_ipvs *ipvs = net_ipvs(net);
3005
3006 mutex_lock(&__ip_vs_mutex);
3007 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3008 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
3009 if (++idx <= start || (svc->ipvs != ipvs))
3010 continue;
3011 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3012 idx--;
3013 goto nla_put_failure;
3014 }
3015 }
3016 }
3017
3018 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
3019 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
3020 if (++idx <= start || (svc->ipvs != ipvs))
3021 continue;
3022 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
3023 idx--;
3024 goto nla_put_failure;
3025 }
3026 }
3027 }
3028
3029nla_put_failure:
3030 mutex_unlock(&__ip_vs_mutex);
3031 cb->args[0] = idx;
3032
3033 return skb->len;
3034}
3035
3036static int ip_vs_genl_parse_service(struct netns_ipvs *ipvs,
3037 struct ip_vs_service_user_kern *usvc,
3038 struct nlattr *nla, int full_entry,
3039 struct ip_vs_service **ret_svc)
3040{
3041 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3042 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
3043 struct ip_vs_service *svc;
3044
3045
3046 if (nla == NULL ||
3047 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
3048 return -EINVAL;
3049
3050 nla_af = attrs[IPVS_SVC_ATTR_AF];
3051 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3052 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3053 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3054 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3055
3056 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3057 return -EINVAL;
3058
3059 memset(usvc, 0, sizeof(*usvc));
3060
3061 usvc->af = nla_get_u16(nla_af);
3062#ifdef CONFIG_IP_VS_IPV6
3063 if (usvc->af != AF_INET && usvc->af != AF_INET6)
3064#else
3065 if (usvc->af != AF_INET)
3066#endif
3067 return -EAFNOSUPPORT;
3068
3069 if (nla_fwmark) {
3070 usvc->protocol = IPPROTO_TCP;
3071 usvc->fwmark = nla_get_u32(nla_fwmark);
3072 } else {
3073 usvc->protocol = nla_get_u16(nla_protocol);
3074 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
3075 usvc->port = nla_get_be16(nla_port);
3076 usvc->fwmark = 0;
3077 }
3078
3079 rcu_read_lock();
3080 if (usvc->fwmark)
3081 svc = __ip_vs_svc_fwm_find(ipvs, usvc->af, usvc->fwmark);
3082 else
3083 svc = __ip_vs_service_find(ipvs, usvc->af, usvc->protocol,
3084 &usvc->addr, usvc->port);
3085 rcu_read_unlock();
3086 *ret_svc = svc;
3087
3088
3089 if (full_entry) {
3090 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
3091 *nla_netmask;
3092 struct ip_vs_flags flags;
3093
3094 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
3095 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
3096 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3097 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3098 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3099
3100 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3101 return -EINVAL;
3102
3103 nla_memcpy(&flags, nla_flags, sizeof(flags));
3104
3105
3106 if (svc)
3107 usvc->flags = svc->flags;
3108
3109
3110 usvc->flags = (usvc->flags & ~flags.mask) |
3111 (flags.flags & flags.mask);
3112 usvc->sched_name = nla_data(nla_sched);
3113 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
3114 usvc->timeout = nla_get_u32(nla_timeout);
3115 usvc->netmask = nla_get_be32(nla_netmask);
3116 }
3117
3118 return 0;
3119}
3120
3121static struct ip_vs_service *ip_vs_genl_find_service(struct netns_ipvs *ipvs,
3122 struct nlattr *nla)
3123{
3124 struct ip_vs_service_user_kern usvc;
3125 struct ip_vs_service *svc;
3126 int ret;
3127
3128 ret = ip_vs_genl_parse_service(ipvs, &usvc, nla, 0, &svc);
3129 return ret ? ERR_PTR(ret) : svc;
3130}
3131
3132static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3133{
3134 struct nlattr *nl_dest;
3135 struct ip_vs_kstats kstats;
3136
3137 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3138 if (!nl_dest)
3139 return -EMSGSIZE;
3140
3141 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
3142 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
3143 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3144 (atomic_read(&dest->conn_flags) &
3145 IP_VS_CONN_F_FWD_MASK)) ||
3146 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3147 atomic_read(&dest->weight)) ||
3148 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3149 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3150 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3151 atomic_read(&dest->activeconns)) ||
3152 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3153 atomic_read(&dest->inactconns)) ||
3154 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
3155 atomic_read(&dest->persistconns)) ||
3156 nla_put_u16(skb, IPVS_DEST_ATTR_ADDR_FAMILY, dest->af))
3157 goto nla_put_failure;
3158 ip_vs_copy_stats(&kstats, &dest->stats);
3159 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &kstats))
3160 goto nla_put_failure;
3161 if (ip_vs_genl_fill_stats64(skb, IPVS_DEST_ATTR_STATS64, &kstats))
3162 goto nla_put_failure;
3163
3164 nla_nest_end(skb, nl_dest);
3165
3166 return 0;
3167
3168nla_put_failure:
3169 nla_nest_cancel(skb, nl_dest);
3170 return -EMSGSIZE;
3171}
3172
3173static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3174 struct netlink_callback *cb)
3175{
3176 void *hdr;
3177
3178 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3179 &ip_vs_genl_family, NLM_F_MULTI,
3180 IPVS_CMD_NEW_DEST);
3181 if (!hdr)
3182 return -EMSGSIZE;
3183
3184 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3185 goto nla_put_failure;
3186
3187 genlmsg_end(skb, hdr);
3188 return 0;
3189
3190nla_put_failure:
3191 genlmsg_cancel(skb, hdr);
3192 return -EMSGSIZE;
3193}
3194
3195static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3196 struct netlink_callback *cb)
3197{
3198 int idx = 0;
3199 int start = cb->args[0];
3200 struct ip_vs_service *svc;
3201 struct ip_vs_dest *dest;
3202 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
3203 struct net *net = sock_net(skb->sk);
3204 struct netns_ipvs *ipvs = net_ipvs(net);
3205
3206 mutex_lock(&__ip_vs_mutex);
3207
3208
3209 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3210 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3211 goto out_err;
3212
3213
3214 svc = ip_vs_genl_find_service(ipvs, attrs[IPVS_CMD_ATTR_SERVICE]);
3215 if (IS_ERR(svc) || svc == NULL)
3216 goto out_err;
3217
3218
3219 list_for_each_entry(dest, &svc->destinations, n_list) {
3220 if (++idx <= start)
3221 continue;
3222 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3223 idx--;
3224 goto nla_put_failure;
3225 }
3226 }
3227
3228nla_put_failure:
3229 cb->args[0] = idx;
3230
3231out_err:
3232 mutex_unlock(&__ip_vs_mutex);
3233
3234 return skb->len;
3235}
3236
3237static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
3238 struct nlattr *nla, int full_entry)
3239{
3240 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3241 struct nlattr *nla_addr, *nla_port;
3242 struct nlattr *nla_addr_family;
3243
3244
3245 if (nla == NULL ||
3246 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3247 return -EINVAL;
3248
3249 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3250 nla_port = attrs[IPVS_DEST_ATTR_PORT];
3251 nla_addr_family = attrs[IPVS_DEST_ATTR_ADDR_FAMILY];
3252
3253 if (!(nla_addr && nla_port))
3254 return -EINVAL;
3255
3256 memset(udest, 0, sizeof(*udest));
3257
3258 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
3259 udest->port = nla_get_be16(nla_port);
3260
3261 if (nla_addr_family)
3262 udest->af = nla_get_u16(nla_addr_family);
3263 else
3264 udest->af = 0;
3265
3266
3267 if (full_entry) {
3268 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3269 *nla_l_thresh;
3270
3271 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3272 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3273 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3274 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3275
3276 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3277 return -EINVAL;
3278
3279 udest->conn_flags = nla_get_u32(nla_fwd)
3280 & IP_VS_CONN_F_FWD_MASK;
3281 udest->weight = nla_get_u32(nla_weight);
3282 udest->u_threshold = nla_get_u32(nla_u_thresh);
3283 udest->l_threshold = nla_get_u32(nla_l_thresh);
3284 }
3285
3286 return 0;
3287}
3288
3289static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3290 struct ipvs_sync_daemon_cfg *c)
3291{
3292 struct nlattr *nl_daemon;
3293
3294 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3295 if (!nl_daemon)
3296 return -EMSGSIZE;
3297
3298 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3299 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, c->mcast_ifn) ||
3300 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, c->syncid) ||
3301 nla_put_u16(skb, IPVS_DAEMON_ATTR_SYNC_MAXLEN, c->sync_maxlen) ||
3302 nla_put_u16(skb, IPVS_DAEMON_ATTR_MCAST_PORT, c->mcast_port) ||
3303 nla_put_u8(skb, IPVS_DAEMON_ATTR_MCAST_TTL, c->mcast_ttl))
3304 goto nla_put_failure;
3305#ifdef CONFIG_IP_VS_IPV6
3306 if (c->mcast_af == AF_INET6) {
3307 if (nla_put_in6_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP6,
3308 &c->mcast_group.in6))
3309 goto nla_put_failure;
3310 } else
3311#endif
3312 if (c->mcast_af == AF_INET &&
3313 nla_put_in_addr(skb, IPVS_DAEMON_ATTR_MCAST_GROUP,
3314 c->mcast_group.ip))
3315 goto nla_put_failure;
3316 nla_nest_end(skb, nl_daemon);
3317
3318 return 0;
3319
3320nla_put_failure:
3321 nla_nest_cancel(skb, nl_daemon);
3322 return -EMSGSIZE;
3323}
3324
3325static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3326 struct ipvs_sync_daemon_cfg *c,
3327 struct netlink_callback *cb)
3328{
3329 void *hdr;
3330 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3331 &ip_vs_genl_family, NLM_F_MULTI,
3332 IPVS_CMD_NEW_DAEMON);
3333 if (!hdr)
3334 return -EMSGSIZE;
3335
3336 if (ip_vs_genl_fill_daemon(skb, state, c))
3337 goto nla_put_failure;
3338
3339 genlmsg_end(skb, hdr);
3340 return 0;
3341
3342nla_put_failure:
3343 genlmsg_cancel(skb, hdr);
3344 return -EMSGSIZE;
3345}
3346
3347static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3348 struct netlink_callback *cb)
3349{
3350 struct net *net = sock_net(skb->sk);
3351 struct netns_ipvs *ipvs = net_ipvs(net);
3352
3353 mutex_lock(&ipvs->sync_mutex);
3354 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
3355 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
3356 &ipvs->mcfg, cb) < 0)
3357 goto nla_put_failure;
3358
3359 cb->args[0] = 1;
3360 }
3361
3362 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
3363 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
3364 &ipvs->bcfg, cb) < 0)
3365 goto nla_put_failure;
3366
3367 cb->args[1] = 1;
3368 }
3369
3370nla_put_failure:
3371 mutex_unlock(&ipvs->sync_mutex);
3372
3373 return skb->len;
3374}
3375
3376static int ip_vs_genl_new_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3377{
3378 struct ipvs_sync_daemon_cfg c;
3379 struct nlattr *a;
3380 int ret;
3381
3382 memset(&c, 0, sizeof(c));
3383 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3384 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3385 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3386 return -EINVAL;
3387 strlcpy(c.mcast_ifn, nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3388 sizeof(c.mcast_ifn));
3389 c.syncid = nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]);
3390
3391 a = attrs[IPVS_DAEMON_ATTR_SYNC_MAXLEN];
3392 if (a)
3393 c.sync_maxlen = nla_get_u16(a);
3394
3395 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP];
3396 if (a) {
3397 c.mcast_af = AF_INET;
3398 c.mcast_group.ip = nla_get_in_addr(a);
3399 if (!ipv4_is_multicast(c.mcast_group.ip))
3400 return -EINVAL;
3401 } else {
3402 a = attrs[IPVS_DAEMON_ATTR_MCAST_GROUP6];
3403 if (a) {
3404#ifdef CONFIG_IP_VS_IPV6
3405 int addr_type;
3406
3407 c.mcast_af = AF_INET6;
3408 c.mcast_group.in6 = nla_get_in6_addr(a);
3409 addr_type = ipv6_addr_type(&c.mcast_group.in6);
3410 if (!(addr_type & IPV6_ADDR_MULTICAST))
3411 return -EINVAL;
3412#else
3413 return -EAFNOSUPPORT;
3414#endif
3415 }
3416 }
3417
3418 a = attrs[IPVS_DAEMON_ATTR_MCAST_PORT];
3419 if (a)
3420 c.mcast_port = nla_get_u16(a);
3421
3422 a = attrs[IPVS_DAEMON_ATTR_MCAST_TTL];
3423 if (a)
3424 c.mcast_ttl = nla_get_u8(a);
3425
3426
3427
3428
3429 if (ipvs->mixed_address_family_dests > 0)
3430 return -EINVAL;
3431
3432 rtnl_lock();
3433 mutex_lock(&ipvs->sync_mutex);
3434 ret = start_sync_thread(ipvs, &c,
3435 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3436 mutex_unlock(&ipvs->sync_mutex);
3437 rtnl_unlock();
3438 return ret;
3439}
3440
3441static int ip_vs_genl_del_daemon(struct netns_ipvs *ipvs, struct nlattr **attrs)
3442{
3443 int ret;
3444
3445 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3446 return -EINVAL;
3447
3448 mutex_lock(&ipvs->sync_mutex);
3449 ret = stop_sync_thread(ipvs,
3450 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
3451 mutex_unlock(&ipvs->sync_mutex);
3452 return ret;
3453}
3454
3455static int ip_vs_genl_set_config(struct netns_ipvs *ipvs, struct nlattr **attrs)
3456{
3457 struct ip_vs_timeout_user t;
3458
3459 __ip_vs_get_timeouts(ipvs, &t);
3460
3461 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3462 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3463
3464 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3465 t.tcp_fin_timeout =
3466 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3467
3468 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3469 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3470
3471 return ip_vs_set_timeout(ipvs, &t);
3472}
3473
3474static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
3475{
3476 int ret = -EINVAL, cmd;
3477 struct net *net = sock_net(skb->sk);
3478 struct netns_ipvs *ipvs = net_ipvs(net);
3479
3480 cmd = info->genlhdr->cmd;
3481
3482 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
3483 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3484
3485 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3486 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3487 info->attrs[IPVS_CMD_ATTR_DAEMON],
3488 ip_vs_daemon_policy))
3489 goto out;
3490
3491 if (cmd == IPVS_CMD_NEW_DAEMON)
3492 ret = ip_vs_genl_new_daemon(ipvs, daemon_attrs);
3493 else
3494 ret = ip_vs_genl_del_daemon(ipvs, daemon_attrs);
3495 }
3496
3497out:
3498 return ret;
3499}
3500
3501static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3502{
3503 struct ip_vs_service *svc = NULL;
3504 struct ip_vs_service_user_kern usvc;
3505 struct ip_vs_dest_user_kern udest;
3506 int ret = 0, cmd;
3507 int need_full_svc = 0, need_full_dest = 0;
3508 struct net *net = sock_net(skb->sk);
3509 struct netns_ipvs *ipvs = net_ipvs(net);
3510
3511 cmd = info->genlhdr->cmd;
3512
3513 mutex_lock(&__ip_vs_mutex);
3514
3515 if (cmd == IPVS_CMD_FLUSH) {
3516 ret = ip_vs_flush(ipvs, false);
3517 goto out;
3518 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3519 ret = ip_vs_genl_set_config(ipvs, info->attrs);
3520 goto out;
3521 } else if (cmd == IPVS_CMD_ZERO &&
3522 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
3523 ret = ip_vs_zero_all(ipvs);
3524 goto out;
3525 }
3526
3527
3528
3529
3530 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3531 need_full_svc = 1;
3532
3533 ret = ip_vs_genl_parse_service(ipvs, &usvc,
3534 info->attrs[IPVS_CMD_ATTR_SERVICE],
3535 need_full_svc, &svc);
3536 if (ret)
3537 goto out;
3538
3539
3540 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3541 ret = -ESRCH;
3542 goto out;
3543 }
3544
3545
3546
3547
3548 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3549 cmd == IPVS_CMD_DEL_DEST) {
3550 if (cmd != IPVS_CMD_DEL_DEST)
3551 need_full_dest = 1;
3552
3553 ret = ip_vs_genl_parse_dest(&udest,
3554 info->attrs[IPVS_CMD_ATTR_DEST],
3555 need_full_dest);
3556 if (ret)
3557 goto out;
3558
3559
3560
3561
3562
3563
3564
3565 if (udest.af == 0)
3566 udest.af = svc->af;
3567
3568 if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
3569
3570
3571
3572 if (ipvs->sync_state) {
3573 ret = -EINVAL;
3574 goto out;
3575 }
3576
3577
3578 switch (udest.conn_flags) {
3579 case IP_VS_CONN_F_TUNNEL:
3580
3581 break;
3582 default:
3583 ret = -EINVAL;
3584 goto out;
3585 }
3586 }
3587 }
3588
3589 switch (cmd) {
3590 case IPVS_CMD_NEW_SERVICE:
3591 if (svc == NULL)
3592 ret = ip_vs_add_service(ipvs, &usvc, &svc);
3593 else
3594 ret = -EEXIST;
3595 break;
3596 case IPVS_CMD_SET_SERVICE:
3597 ret = ip_vs_edit_service(svc, &usvc);
3598 break;
3599 case IPVS_CMD_DEL_SERVICE:
3600 ret = ip_vs_del_service(svc);
3601
3602 break;
3603 case IPVS_CMD_NEW_DEST:
3604 ret = ip_vs_add_dest(svc, &udest);
3605 break;
3606 case IPVS_CMD_SET_DEST:
3607 ret = ip_vs_edit_dest(svc, &udest);
3608 break;
3609 case IPVS_CMD_DEL_DEST:
3610 ret = ip_vs_del_dest(svc, &udest);
3611 break;
3612 case IPVS_CMD_ZERO:
3613 ret = ip_vs_zero_service(svc);
3614 break;
3615 default:
3616 ret = -EINVAL;
3617 }
3618
3619out:
3620 mutex_unlock(&__ip_vs_mutex);
3621
3622 return ret;
3623}
3624
3625static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3626{
3627 struct sk_buff *msg;
3628 void *reply;
3629 int ret, cmd, reply_cmd;
3630 struct net *net = sock_net(skb->sk);
3631 struct netns_ipvs *ipvs = net_ipvs(net);
3632
3633 cmd = info->genlhdr->cmd;
3634
3635 if (cmd == IPVS_CMD_GET_SERVICE)
3636 reply_cmd = IPVS_CMD_NEW_SERVICE;
3637 else if (cmd == IPVS_CMD_GET_INFO)
3638 reply_cmd = IPVS_CMD_SET_INFO;
3639 else if (cmd == IPVS_CMD_GET_CONFIG)
3640 reply_cmd = IPVS_CMD_SET_CONFIG;
3641 else {
3642 pr_err("unknown Generic Netlink command\n");
3643 return -EINVAL;
3644 }
3645
3646 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3647 if (!msg)
3648 return -ENOMEM;
3649
3650 mutex_lock(&__ip_vs_mutex);
3651
3652 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3653 if (reply == NULL)
3654 goto nla_put_failure;
3655
3656 switch (cmd) {
3657 case IPVS_CMD_GET_SERVICE:
3658 {
3659 struct ip_vs_service *svc;
3660
3661 svc = ip_vs_genl_find_service(ipvs,
3662 info->attrs[IPVS_CMD_ATTR_SERVICE]);
3663 if (IS_ERR(svc)) {
3664 ret = PTR_ERR(svc);
3665 goto out_err;
3666 } else if (svc) {
3667 ret = ip_vs_genl_fill_service(msg, svc);
3668 if (ret)
3669 goto nla_put_failure;
3670 } else {
3671 ret = -ESRCH;
3672 goto out_err;
3673 }
3674
3675 break;
3676 }
3677
3678 case IPVS_CMD_GET_CONFIG:
3679 {
3680 struct ip_vs_timeout_user t;
3681
3682 __ip_vs_get_timeouts(ipvs, &t);
3683#ifdef CONFIG_IP_VS_PROTO_TCP
3684 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3685 t.tcp_timeout) ||
3686 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3687 t.tcp_fin_timeout))
3688 goto nla_put_failure;
3689#endif
3690#ifdef CONFIG_IP_VS_PROTO_UDP
3691 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3692 goto nla_put_failure;
3693#endif
3694
3695 break;
3696 }
3697
3698 case IPVS_CMD_GET_INFO:
3699 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3700 IP_VS_VERSION_CODE) ||
3701 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3702 ip_vs_conn_tab_size))
3703 goto nla_put_failure;
3704 break;
3705 }
3706
3707 genlmsg_end(msg, reply);
3708 ret = genlmsg_reply(msg, info);
3709 goto out;
3710
3711nla_put_failure:
3712 pr_err("not enough space in Netlink message\n");
3713 ret = -EMSGSIZE;
3714
3715out_err:
3716 nlmsg_free(msg);
3717out:
3718 mutex_unlock(&__ip_vs_mutex);
3719
3720 return ret;
3721}
3722
3723
3724static const struct genl_ops ip_vs_genl_ops[] = {
3725 {
3726 .cmd = IPVS_CMD_NEW_SERVICE,
3727 .flags = GENL_ADMIN_PERM,
3728 .policy = ip_vs_cmd_policy,
3729 .doit = ip_vs_genl_set_cmd,
3730 },
3731 {
3732 .cmd = IPVS_CMD_SET_SERVICE,
3733 .flags = GENL_ADMIN_PERM,
3734 .policy = ip_vs_cmd_policy,
3735 .doit = ip_vs_genl_set_cmd,
3736 },
3737 {
3738 .cmd = IPVS_CMD_DEL_SERVICE,
3739 .flags = GENL_ADMIN_PERM,
3740 .policy = ip_vs_cmd_policy,
3741 .doit = ip_vs_genl_set_cmd,
3742 },
3743 {
3744 .cmd = IPVS_CMD_GET_SERVICE,
3745 .flags = GENL_ADMIN_PERM,
3746 .doit = ip_vs_genl_get_cmd,
3747 .dumpit = ip_vs_genl_dump_services,
3748 .policy = ip_vs_cmd_policy,
3749 },
3750 {
3751 .cmd = IPVS_CMD_NEW_DEST,
3752 .flags = GENL_ADMIN_PERM,
3753 .policy = ip_vs_cmd_policy,
3754 .doit = ip_vs_genl_set_cmd,
3755 },
3756 {
3757 .cmd = IPVS_CMD_SET_DEST,
3758 .flags = GENL_ADMIN_PERM,
3759 .policy = ip_vs_cmd_policy,
3760 .doit = ip_vs_genl_set_cmd,
3761 },
3762 {
3763 .cmd = IPVS_CMD_DEL_DEST,
3764 .flags = GENL_ADMIN_PERM,
3765 .policy = ip_vs_cmd_policy,
3766 .doit = ip_vs_genl_set_cmd,
3767 },
3768 {
3769 .cmd = IPVS_CMD_GET_DEST,
3770 .flags = GENL_ADMIN_PERM,
3771 .policy = ip_vs_cmd_policy,
3772 .dumpit = ip_vs_genl_dump_dests,
3773 },
3774 {
3775 .cmd = IPVS_CMD_NEW_DAEMON,
3776 .flags = GENL_ADMIN_PERM,
3777 .policy = ip_vs_cmd_policy,
3778 .doit = ip_vs_genl_set_daemon,
3779 },
3780 {
3781 .cmd = IPVS_CMD_DEL_DAEMON,
3782 .flags = GENL_ADMIN_PERM,
3783 .policy = ip_vs_cmd_policy,
3784 .doit = ip_vs_genl_set_daemon,
3785 },
3786 {
3787 .cmd = IPVS_CMD_GET_DAEMON,
3788 .flags = GENL_ADMIN_PERM,
3789 .dumpit = ip_vs_genl_dump_daemons,
3790 },
3791 {
3792 .cmd = IPVS_CMD_SET_CONFIG,
3793 .flags = GENL_ADMIN_PERM,
3794 .policy = ip_vs_cmd_policy,
3795 .doit = ip_vs_genl_set_cmd,
3796 },
3797 {
3798 .cmd = IPVS_CMD_GET_CONFIG,
3799 .flags = GENL_ADMIN_PERM,
3800 .doit = ip_vs_genl_get_cmd,
3801 },
3802 {
3803 .cmd = IPVS_CMD_GET_INFO,
3804 .flags = GENL_ADMIN_PERM,
3805 .doit = ip_vs_genl_get_cmd,
3806 },
3807 {
3808 .cmd = IPVS_CMD_ZERO,
3809 .flags = GENL_ADMIN_PERM,
3810 .policy = ip_vs_cmd_policy,
3811 .doit = ip_vs_genl_set_cmd,
3812 },
3813 {
3814 .cmd = IPVS_CMD_FLUSH,
3815 .flags = GENL_ADMIN_PERM,
3816 .doit = ip_vs_genl_set_cmd,
3817 },
3818};
3819
3820static int __init ip_vs_genl_register(void)
3821{
3822 return genl_register_family_with_ops(&ip_vs_genl_family,
3823 ip_vs_genl_ops);
3824}
3825
3826static void ip_vs_genl_unregister(void)
3827{
3828 genl_unregister_family(&ip_vs_genl_family);
3829}
3830
3831
3832
3833
3834
3835
3836#ifdef CONFIG_SYSCTL
3837static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs)
3838{
3839 struct net *net = ipvs->net;
3840 int idx;
3841 struct ctl_table *tbl;
3842
3843 atomic_set(&ipvs->dropentry, 0);
3844 spin_lock_init(&ipvs->dropentry_lock);
3845 spin_lock_init(&ipvs->droppacket_lock);
3846 spin_lock_init(&ipvs->securetcp_lock);
3847
3848 if (!net_eq(net, &init_net)) {
3849 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3850 if (tbl == NULL)
3851 return -ENOMEM;
3852
3853
3854 if (net->user_ns != &init_user_ns)
3855 tbl[0].procname = NULL;
3856 } else
3857 tbl = vs_vars;
3858
3859 for (idx = 0; idx < ARRAY_SIZE(vs_vars); idx++) {
3860 if (tbl[idx].proc_handler == proc_do_defense_mode)
3861 tbl[idx].extra2 = ipvs;
3862 }
3863 idx = 0;
3864 ipvs->sysctl_amemthresh = 1024;
3865 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3866 ipvs->sysctl_am_droprate = 10;
3867 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3868 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3869 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3870#ifdef CONFIG_IP_VS_NFCT
3871 tbl[idx++].data = &ipvs->sysctl_conntrack;
3872#endif
3873 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3874 ipvs->sysctl_snat_reroute = 1;
3875 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3876 ipvs->sysctl_sync_ver = 1;
3877 tbl[idx++].data = &ipvs->sysctl_sync_ver;
3878 ipvs->sysctl_sync_ports = 1;
3879 tbl[idx++].data = &ipvs->sysctl_sync_ports;
3880 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
3881 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3882 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3883 ipvs->sysctl_sync_sock_size = 0;
3884 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
3885 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3886 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
3887 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3888 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
3889 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
3890 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3891 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
3892 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3893 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
3894 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3895 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3896 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3897 tbl[idx++].data = &ipvs->sysctl_sync_retries;
3898 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3899 ipvs->sysctl_pmtu_disc = 1;
3900 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
3901 tbl[idx++].data = &ipvs->sysctl_backup_only;
3902 ipvs->sysctl_conn_reuse_mode = 1;
3903 tbl[idx++].data = &ipvs->sysctl_conn_reuse_mode;
3904 tbl[idx++].data = &ipvs->sysctl_schedule_icmp;
3905 tbl[idx++].data = &ipvs->sysctl_ignore_tunneled;
3906
3907 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
3908 if (ipvs->sysctl_hdr == NULL) {
3909 if (!net_eq(net, &init_net))
3910 kfree(tbl);
3911 return -ENOMEM;
3912 }
3913 ip_vs_start_estimator(ipvs, &ipvs->tot_stats);
3914 ipvs->sysctl_tbl = tbl;
3915
3916 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3917 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
3918
3919 return 0;
3920}
3921
3922static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs)
3923{
3924 struct net *net = ipvs->net;
3925
3926 cancel_delayed_work_sync(&ipvs->defense_work);
3927 cancel_work_sync(&ipvs->defense_work.work);
3928 unregister_net_sysctl_table(ipvs->sysctl_hdr);
3929 ip_vs_stop_estimator(ipvs, &ipvs->tot_stats);
3930
3931 if (!net_eq(net, &init_net))
3932 kfree(ipvs->sysctl_tbl);
3933}
3934
3935#else
3936
3937static int __net_init ip_vs_control_net_init_sysctl(struct netns_ipvs *ipvs) { return 0; }
3938static void __net_exit ip_vs_control_net_cleanup_sysctl(struct netns_ipvs *ipvs) { }
3939
3940#endif
3941
3942static struct notifier_block ip_vs_dst_notifier = {
3943 .notifier_call = ip_vs_dst_event,
3944};
3945
3946int __net_init ip_vs_control_net_init(struct netns_ipvs *ipvs)
3947{
3948 int i, idx;
3949
3950
3951 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
3952 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
3953
3954 INIT_LIST_HEAD(&ipvs->dest_trash);
3955 spin_lock_init(&ipvs->dest_trash_lock);
3956 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
3957 (unsigned long) ipvs);
3958 atomic_set(&ipvs->ftpsvc_counter, 0);
3959 atomic_set(&ipvs->nullsvc_counter, 0);
3960
3961
3962 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
3963 if (!ipvs->tot_stats.cpustats)
3964 return -ENOMEM;
3965
3966 for_each_possible_cpu(i) {
3967 struct ip_vs_cpu_stats *ipvs_tot_stats;
3968 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
3969 u64_stats_init(&ipvs_tot_stats->syncp);
3970 }
3971
3972 spin_lock_init(&ipvs->tot_stats.lock);
3973
3974 proc_create("ip_vs", 0, ipvs->net->proc_net, &ip_vs_info_fops);
3975 proc_create("ip_vs_stats", 0, ipvs->net->proc_net, &ip_vs_stats_fops);
3976 proc_create("ip_vs_stats_percpu", 0, ipvs->net->proc_net,
3977 &ip_vs_stats_percpu_fops);
3978
3979 if (ip_vs_control_net_init_sysctl(ipvs))
3980 goto err;
3981
3982 return 0;
3983
3984err:
3985 free_percpu(ipvs->tot_stats.cpustats);
3986 return -ENOMEM;
3987}
3988
3989void __net_exit ip_vs_control_net_cleanup(struct netns_ipvs *ipvs)
3990{
3991 ip_vs_trash_cleanup(ipvs);
3992 ip_vs_control_net_cleanup_sysctl(ipvs);
3993 remove_proc_entry("ip_vs_stats_percpu", ipvs->net->proc_net);
3994 remove_proc_entry("ip_vs_stats", ipvs->net->proc_net);
3995 remove_proc_entry("ip_vs", ipvs->net->proc_net);
3996 free_percpu(ipvs->tot_stats.cpustats);
3997}
3998
3999int __init ip_vs_register_nl_ioctl(void)
4000{
4001 int ret;
4002
4003 ret = nf_register_sockopt(&ip_vs_sockopts);
4004 if (ret) {
4005 pr_err("cannot register sockopt.\n");
4006 goto err_sock;
4007 }
4008
4009 ret = ip_vs_genl_register();
4010 if (ret) {
4011 pr_err("cannot register Generic Netlink interface.\n");
4012 goto err_genl;
4013 }
4014 return 0;
4015
4016err_genl:
4017 nf_unregister_sockopt(&ip_vs_sockopts);
4018err_sock:
4019 return ret;
4020}
4021
4022void ip_vs_unregister_nl_ioctl(void)
4023{
4024 ip_vs_genl_unregister();
4025 nf_unregister_sockopt(&ip_vs_sockopts);
4026}
4027
4028int __init ip_vs_control_init(void)
4029{
4030 int idx;
4031 int ret;
4032
4033 EnterFunction(2);
4034
4035
4036 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
4037 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
4038 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
4039 }
4040
4041 smp_wmb();
4042
4043 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
4044 if (ret < 0)
4045 return ret;
4046
4047 LeaveFunction(2);
4048 return 0;
4049}
4050
4051
4052void ip_vs_control_cleanup(void)
4053{
4054 EnterFunction(2);
4055 unregister_netdevice_notifier(&ip_vs_dst_notifier);
4056 LeaveFunction(2);
4057}
4058