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5
6#ifndef _NET_IP_VS_H
7#define _NET_IP_VS_H
8
9#include <linux/ip_vs.h>
10
11#include <asm/types.h>
12
13#include <linux/list.h>
14#include <linux/spinlock.h>
15#include <linux/atomic.h>
16#include <linux/compiler.h>
17#include <linux/timer.h>
18#include <linux/bug.h>
19
20#include <net/checksum.h>
21#include <linux/netfilter.h>
22#include <linux/ip.h>
23#include <linux/ipv6.h>
24#include <net/ipv6.h>
25#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
26#include <net/netfilter/nf_conntrack.h>
27#endif
28#include <net/net_namespace.h>
29
30
31
32
33static inline struct netns_ipvs *net_ipvs(struct net* net)
34{
35 return net->ipvs;
36}
37
38
39
40
41static inline struct net *skb_net(const struct sk_buff *skb)
42{
43#ifdef CONFIG_NET_NS
44#ifdef CONFIG_IP_VS_DEBUG
45
46
47
48
49
50 if (likely(skb->dev && skb->dev->nd_net))
51 return dev_net(skb->dev);
52 if (skb_dst(skb) && skb_dst(skb)->dev)
53 return dev_net(skb_dst(skb)->dev);
54 WARN(skb->sk, "Maybe skb_sknet should be used in %s() at line:%d\n",
55 __func__, __LINE__);
56 if (likely(skb->sk && skb->sk->sk_net))
57 return sock_net(skb->sk);
58 pr_err("There is no net ptr to find in the skb in %s() line:%d\n",
59 __func__, __LINE__);
60 BUG();
61#else
62 return dev_net(skb->dev ? : skb_dst(skb)->dev);
63#endif
64#else
65 return &init_net;
66#endif
67}
68
69static inline struct net *skb_sknet(const struct sk_buff *skb)
70{
71#ifdef CONFIG_NET_NS
72#ifdef CONFIG_IP_VS_DEBUG
73
74 if (likely(skb->sk && skb->sk->sk_net))
75 return sock_net(skb->sk);
76 WARN(skb->dev, "Maybe skb_net should be used instead in %s() line:%d\n",
77 __func__, __LINE__);
78 if (likely(skb->dev && skb->dev->nd_net))
79 return dev_net(skb->dev);
80 pr_err("There is no net ptr to find in the skb in %s() line:%d\n",
81 __func__, __LINE__);
82 BUG();
83#else
84 return sock_net(skb->sk);
85#endif
86#else
87 return &init_net;
88#endif
89}
90
91
92
93
94static inline struct net *seq_file_single_net(struct seq_file *seq)
95{
96#ifdef CONFIG_NET_NS
97 return (struct net *)seq->private;
98#else
99 return &init_net;
100#endif
101}
102
103
104extern int ip_vs_conn_tab_size;
105
106
107struct ip_vs_iphdr {
108 int len;
109 __u8 protocol;
110 union nf_inet_addr saddr;
111 union nf_inet_addr daddr;
112};
113
114static inline void
115ip_vs_fill_iphdr(int af, const void *nh, struct ip_vs_iphdr *iphdr)
116{
117#ifdef CONFIG_IP_VS_IPV6
118 if (af == AF_INET6) {
119 const struct ipv6hdr *iph = nh;
120 iphdr->len = sizeof(struct ipv6hdr);
121 iphdr->protocol = iph->nexthdr;
122 iphdr->saddr.in6 = iph->saddr;
123 iphdr->daddr.in6 = iph->daddr;
124 } else
125#endif
126 {
127 const struct iphdr *iph = nh;
128 iphdr->len = iph->ihl * 4;
129 iphdr->protocol = iph->protocol;
130 iphdr->saddr.ip = iph->saddr;
131 iphdr->daddr.ip = iph->daddr;
132 }
133}
134
135static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst,
136 const union nf_inet_addr *src)
137{
138#ifdef CONFIG_IP_VS_IPV6
139 if (af == AF_INET6)
140 dst->in6 = src->in6;
141 else
142#endif
143 dst->ip = src->ip;
144}
145
146static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a,
147 const union nf_inet_addr *b)
148{
149#ifdef CONFIG_IP_VS_IPV6
150 if (af == AF_INET6)
151 return ipv6_addr_equal(&a->in6, &b->in6);
152#endif
153 return a->ip == b->ip;
154}
155
156#ifdef CONFIG_IP_VS_DEBUG
157#include <linux/net.h>
158
159extern int ip_vs_get_debug_level(void);
160
161static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len,
162 const union nf_inet_addr *addr,
163 int *idx)
164{
165 int len;
166#ifdef CONFIG_IP_VS_IPV6
167 if (af == AF_INET6)
168 len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6]",
169 &addr->in6) + 1;
170 else
171#endif
172 len = snprintf(&buf[*idx], buf_len - *idx, "%pI4",
173 &addr->ip) + 1;
174
175 *idx += len;
176 BUG_ON(*idx > buf_len + 1);
177 return &buf[*idx - len];
178}
179
180#define IP_VS_DBG_BUF(level, msg, ...) \
181 do { \
182 char ip_vs_dbg_buf[160]; \
183 int ip_vs_dbg_idx = 0; \
184 if (level <= ip_vs_get_debug_level()) \
185 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
186 } while (0)
187#define IP_VS_ERR_BUF(msg...) \
188 do { \
189 char ip_vs_dbg_buf[160]; \
190 int ip_vs_dbg_idx = 0; \
191 pr_err(msg); \
192 } while (0)
193
194
195#define IP_VS_DBG_ADDR(af, addr) \
196 ip_vs_dbg_addr(af, ip_vs_dbg_buf, \
197 sizeof(ip_vs_dbg_buf), addr, \
198 &ip_vs_dbg_idx)
199
200#define IP_VS_DBG(level, msg, ...) \
201 do { \
202 if (level <= ip_vs_get_debug_level()) \
203 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
204 } while (0)
205#define IP_VS_DBG_RL(msg, ...) \
206 do { \
207 if (net_ratelimit()) \
208 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
209 } while (0)
210#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \
211 do { \
212 if (level <= ip_vs_get_debug_level()) \
213 pp->debug_packet(af, pp, skb, ofs, msg); \
214 } while (0)
215#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \
216 do { \
217 if (level <= ip_vs_get_debug_level() && \
218 net_ratelimit()) \
219 pp->debug_packet(af, pp, skb, ofs, msg); \
220 } while (0)
221#else
222#define IP_VS_DBG_BUF(level, msg...) do {} while (0)
223#define IP_VS_ERR_BUF(msg...) do {} while (0)
224#define IP_VS_DBG(level, msg...) do {} while (0)
225#define IP_VS_DBG_RL(msg...) do {} while (0)
226#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
227#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
228#endif
229
230#define IP_VS_BUG() BUG()
231#define IP_VS_ERR_RL(msg, ...) \
232 do { \
233 if (net_ratelimit()) \
234 pr_err(msg, ##__VA_ARGS__); \
235 } while (0)
236
237#ifdef CONFIG_IP_VS_DEBUG
238#define EnterFunction(level) \
239 do { \
240 if (level <= ip_vs_get_debug_level()) \
241 printk(KERN_DEBUG \
242 pr_fmt("Enter: %s, %s line %i\n"), \
243 __func__, __FILE__, __LINE__); \
244 } while (0)
245#define LeaveFunction(level) \
246 do { \
247 if (level <= ip_vs_get_debug_level()) \
248 printk(KERN_DEBUG \
249 pr_fmt("Leave: %s, %s line %i\n"), \
250 __func__, __FILE__, __LINE__); \
251 } while (0)
252#else
253#define EnterFunction(level) do {} while (0)
254#define LeaveFunction(level) do {} while (0)
255#endif
256
257#define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); }
258
259
260
261
262
263#define FTPPORT cpu_to_be16(21)
264#define FTPDATA cpu_to_be16(20)
265
266
267
268
269enum {
270 IP_VS_TCP_S_NONE = 0,
271 IP_VS_TCP_S_ESTABLISHED,
272 IP_VS_TCP_S_SYN_SENT,
273 IP_VS_TCP_S_SYN_RECV,
274 IP_VS_TCP_S_FIN_WAIT,
275 IP_VS_TCP_S_TIME_WAIT,
276 IP_VS_TCP_S_CLOSE,
277 IP_VS_TCP_S_CLOSE_WAIT,
278 IP_VS_TCP_S_LAST_ACK,
279 IP_VS_TCP_S_LISTEN,
280 IP_VS_TCP_S_SYNACK,
281 IP_VS_TCP_S_LAST
282};
283
284
285
286
287enum {
288 IP_VS_UDP_S_NORMAL,
289 IP_VS_UDP_S_LAST,
290};
291
292
293
294
295enum {
296 IP_VS_ICMP_S_NORMAL,
297 IP_VS_ICMP_S_LAST,
298};
299
300
301
302
303enum ip_vs_sctp_states {
304 IP_VS_SCTP_S_NONE,
305 IP_VS_SCTP_S_INIT_CLI,
306 IP_VS_SCTP_S_INIT_SER,
307 IP_VS_SCTP_S_INIT_ACK_CLI,
308 IP_VS_SCTP_S_INIT_ACK_SER,
309 IP_VS_SCTP_S_ECHO_CLI,
310 IP_VS_SCTP_S_ECHO_SER,
311 IP_VS_SCTP_S_ESTABLISHED,
312 IP_VS_SCTP_S_SHUT_CLI,
313 IP_VS_SCTP_S_SHUT_SER,
314 IP_VS_SCTP_S_SHUT_ACK_CLI,
315 IP_VS_SCTP_S_SHUT_ACK_SER,
316 IP_VS_SCTP_S_CLOSED,
317 IP_VS_SCTP_S_LAST
318};
319
320
321
322
323
324
325struct ip_vs_seq {
326 __u32 init_seq;
327 __u32 delta;
328 __u32 previous_delta;
329
330};
331
332
333
334
335struct ip_vs_counters {
336 __u32 conns;
337 __u32 inpkts;
338 __u32 outpkts;
339 __u64 inbytes;
340 __u64 outbytes;
341};
342
343
344
345struct ip_vs_cpu_stats {
346 struct ip_vs_counters ustats;
347 struct u64_stats_sync syncp;
348};
349
350
351
352
353struct ip_vs_estimator {
354 struct list_head list;
355
356 u64 last_inbytes;
357 u64 last_outbytes;
358 u32 last_conns;
359 u32 last_inpkts;
360 u32 last_outpkts;
361
362 u32 cps;
363 u32 inpps;
364 u32 outpps;
365 u32 inbps;
366 u32 outbps;
367};
368
369struct ip_vs_stats {
370 struct ip_vs_stats_user ustats;
371 struct ip_vs_estimator est;
372 struct ip_vs_cpu_stats *cpustats;
373 spinlock_t lock;
374 struct ip_vs_stats_user ustats0;
375};
376
377struct dst_entry;
378struct iphdr;
379struct ip_vs_conn;
380struct ip_vs_app;
381struct sk_buff;
382struct ip_vs_proto_data;
383
384struct ip_vs_protocol {
385 struct ip_vs_protocol *next;
386 char *name;
387 u16 protocol;
388 u16 num_states;
389 int dont_defrag;
390
391 void (*init)(struct ip_vs_protocol *pp);
392
393 void (*exit)(struct ip_vs_protocol *pp);
394
395 int (*init_netns)(struct net *net, struct ip_vs_proto_data *pd);
396
397 void (*exit_netns)(struct net *net, struct ip_vs_proto_data *pd);
398
399 int (*conn_schedule)(int af, struct sk_buff *skb,
400 struct ip_vs_proto_data *pd,
401 int *verdict, struct ip_vs_conn **cpp);
402
403 struct ip_vs_conn *
404 (*conn_in_get)(int af,
405 const struct sk_buff *skb,
406 const struct ip_vs_iphdr *iph,
407 unsigned int proto_off,
408 int inverse);
409
410 struct ip_vs_conn *
411 (*conn_out_get)(int af,
412 const struct sk_buff *skb,
413 const struct ip_vs_iphdr *iph,
414 unsigned int proto_off,
415 int inverse);
416
417 int (*snat_handler)(struct sk_buff *skb,
418 struct ip_vs_protocol *pp, struct ip_vs_conn *cp);
419
420 int (*dnat_handler)(struct sk_buff *skb,
421 struct ip_vs_protocol *pp, struct ip_vs_conn *cp);
422
423 int (*csum_check)(int af, struct sk_buff *skb,
424 struct ip_vs_protocol *pp);
425
426 const char *(*state_name)(int state);
427
428 void (*state_transition)(struct ip_vs_conn *cp, int direction,
429 const struct sk_buff *skb,
430 struct ip_vs_proto_data *pd);
431
432 int (*register_app)(struct net *net, struct ip_vs_app *inc);
433
434 void (*unregister_app)(struct net *net, struct ip_vs_app *inc);
435
436 int (*app_conn_bind)(struct ip_vs_conn *cp);
437
438 void (*debug_packet)(int af, struct ip_vs_protocol *pp,
439 const struct sk_buff *skb,
440 int offset,
441 const char *msg);
442
443 void (*timeout_change)(struct ip_vs_proto_data *pd, int flags);
444};
445
446
447
448
449struct ip_vs_proto_data {
450 struct ip_vs_proto_data *next;
451 struct ip_vs_protocol *pp;
452 int *timeout_table;
453 atomic_t appcnt;
454 struct tcp_states_t *tcp_state_table;
455};
456
457extern struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto);
458extern struct ip_vs_proto_data *ip_vs_proto_data_get(struct net *net,
459 unsigned short proto);
460
461struct ip_vs_conn_param {
462 struct net *net;
463 const union nf_inet_addr *caddr;
464 const union nf_inet_addr *vaddr;
465 __be16 cport;
466 __be16 vport;
467 __u16 protocol;
468 u16 af;
469
470 const struct ip_vs_pe *pe;
471 char *pe_data;
472 __u8 pe_data_len;
473};
474
475
476
477
478struct ip_vs_conn {
479 struct hlist_node c_list;
480#ifdef CONFIG_NET_NS
481 struct net *net;
482#endif
483
484 u16 af;
485 __be16 cport;
486 __be16 vport;
487 __be16 dport;
488 __u32 fwmark;
489 union nf_inet_addr caddr;
490 union nf_inet_addr vaddr;
491 union nf_inet_addr daddr;
492 volatile __u32 flags;
493 __u16 protocol;
494
495
496 atomic_t refcnt;
497 struct timer_list timer;
498 volatile unsigned long timeout;
499
500
501 spinlock_t lock;
502 volatile __u16 state;
503 volatile __u16 old_state;
504
505
506
507 unsigned long sync_endtime;
508
509
510 struct ip_vs_conn *control;
511 atomic_t n_control;
512 struct ip_vs_dest *dest;
513 atomic_t in_pkts;
514
515
516
517
518
519
520 int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp,
521 struct ip_vs_protocol *pp);
522
523
524
525
526 struct ip_vs_app *app;
527 void *app_data;
528 struct ip_vs_seq in_seq;
529 struct ip_vs_seq out_seq;
530
531 const struct ip_vs_pe *pe;
532 char *pe_data;
533 __u8 pe_data_len;
534};
535
536
537
538
539static inline struct net *ip_vs_conn_net(const struct ip_vs_conn *cp)
540{
541#ifdef CONFIG_NET_NS
542 return cp->net;
543#else
544 return &init_net;
545#endif
546}
547static inline void ip_vs_conn_net_set(struct ip_vs_conn *cp, struct net *net)
548{
549#ifdef CONFIG_NET_NS
550 cp->net = net;
551#endif
552}
553
554static inline int ip_vs_conn_net_eq(const struct ip_vs_conn *cp,
555 struct net *net)
556{
557#ifdef CONFIG_NET_NS
558 return cp->net == net;
559#else
560 return 1;
561#endif
562}
563
564
565
566
567
568
569
570
571
572struct ip_vs_service_user_kern {
573
574 u16 af;
575 u16 protocol;
576 union nf_inet_addr addr;
577 u16 port;
578 u32 fwmark;
579
580
581 char *sched_name;
582 char *pe_name;
583 unsigned int flags;
584 unsigned int timeout;
585 u32 netmask;
586};
587
588
589struct ip_vs_dest_user_kern {
590
591 union nf_inet_addr addr;
592 u16 port;
593
594
595 unsigned int conn_flags;
596 int weight;
597
598
599 u32 u_threshold;
600 u32 l_threshold;
601};
602
603
604
605
606
607
608struct ip_vs_service {
609 struct list_head s_list;
610 struct list_head f_list;
611 atomic_t refcnt;
612 atomic_t usecnt;
613
614 u16 af;
615 __u16 protocol;
616 union nf_inet_addr addr;
617 __be16 port;
618 __u32 fwmark;
619 unsigned int flags;
620 unsigned int timeout;
621 __be32 netmask;
622 struct net *net;
623
624 struct list_head destinations;
625 __u32 num_dests;
626 struct ip_vs_stats stats;
627 struct ip_vs_app *inc;
628
629
630 struct ip_vs_scheduler *scheduler;
631 rwlock_t sched_lock;
632 void *sched_data;
633
634
635 struct ip_vs_pe *pe;
636};
637
638
639
640
641
642
643struct ip_vs_dest {
644 struct list_head n_list;
645 struct list_head d_list;
646
647 u16 af;
648 __be16 port;
649 union nf_inet_addr addr;
650 volatile unsigned int flags;
651 atomic_t conn_flags;
652 atomic_t weight;
653
654 atomic_t refcnt;
655 struct ip_vs_stats stats;
656
657
658 atomic_t activeconns;
659 atomic_t inactconns;
660 atomic_t persistconns;
661 __u32 u_threshold;
662 __u32 l_threshold;
663
664
665 spinlock_t dst_lock;
666 struct dst_entry *dst_cache;
667 u32 dst_rtos;
668 u32 dst_cookie;
669 union nf_inet_addr dst_saddr;
670
671
672 struct ip_vs_service *svc;
673 __u16 protocol;
674 __be16 vport;
675 union nf_inet_addr vaddr;
676 __u32 vfwmark;
677};
678
679
680
681
682
683struct ip_vs_scheduler {
684 struct list_head n_list;
685 char *name;
686 atomic_t refcnt;
687 struct module *module;
688
689
690 int (*init_service)(struct ip_vs_service *svc);
691
692 int (*done_service)(struct ip_vs_service *svc);
693
694 int (*update_service)(struct ip_vs_service *svc);
695
696
697 struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc,
698 const struct sk_buff *skb);
699};
700
701
702struct ip_vs_pe {
703 struct list_head n_list;
704 char *name;
705 atomic_t refcnt;
706 struct module *module;
707
708
709 int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb);
710 bool (*ct_match)(const struct ip_vs_conn_param *p,
711 struct ip_vs_conn *ct);
712 u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval,
713 bool inverse);
714 int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf);
715};
716
717
718
719
720struct ip_vs_app {
721 struct list_head a_list;
722 int type;
723 char *name;
724 __u16 protocol;
725 struct module *module;
726 struct list_head incs_list;
727
728
729 struct list_head p_list;
730 struct ip_vs_app *app;
731 __be16 port;
732 atomic_t usecnt;
733
734
735
736
737
738
739 int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *,
740 struct sk_buff *, int *diff);
741
742
743
744
745
746
747 int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *,
748 struct sk_buff *, int *diff);
749
750
751 int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *);
752
753
754 int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *);
755
756
757
758 int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *,
759 struct ip_vs_protocol *);
760
761 void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *);
762
763 int * timeout_table;
764 int * timeouts;
765 int timeouts_size;
766
767 int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app,
768 int *verdict, struct ip_vs_conn **cpp);
769
770 struct ip_vs_conn *
771 (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app,
772 const struct iphdr *iph, unsigned int proto_off,
773 int inverse);
774
775 struct ip_vs_conn *
776 (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app,
777 const struct iphdr *iph, unsigned int proto_off,
778 int inverse);
779
780 int (*state_transition)(struct ip_vs_conn *cp, int direction,
781 const struct sk_buff *skb,
782 struct ip_vs_app *app);
783
784 void (*timeout_change)(struct ip_vs_app *app, int flags);
785};
786
787struct ipvs_master_sync_state {
788 struct list_head sync_queue;
789 struct ip_vs_sync_buff *sync_buff;
790 int sync_queue_len;
791 unsigned int sync_queue_delay;
792 struct task_struct *master_thread;
793 struct delayed_work master_wakeup_work;
794 struct netns_ipvs *ipvs;
795};
796
797
798struct netns_ipvs {
799 int gen;
800 int enable;
801
802
803
804 #define IP_VS_RTAB_BITS 4
805 #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
806 #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
807
808 struct list_head rs_table[IP_VS_RTAB_SIZE];
809
810 struct list_head app_list;
811
812 #define IP_VS_PROTO_TAB_SIZE 32
813 struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE];
814
815#ifdef CONFIG_IP_VS_PROTO_TCP
816 #define TCP_APP_TAB_BITS 4
817 #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS)
818 #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1)
819 struct list_head tcp_apps[TCP_APP_TAB_SIZE];
820 spinlock_t tcp_app_lock;
821#endif
822
823#ifdef CONFIG_IP_VS_PROTO_UDP
824 #define UDP_APP_TAB_BITS 4
825 #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS)
826 #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1)
827 struct list_head udp_apps[UDP_APP_TAB_SIZE];
828 spinlock_t udp_app_lock;
829#endif
830
831#ifdef CONFIG_IP_VS_PROTO_SCTP
832 #define SCTP_APP_TAB_BITS 4
833 #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS)
834 #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1)
835
836 struct list_head sctp_apps[SCTP_APP_TAB_SIZE];
837 spinlock_t sctp_app_lock;
838#endif
839
840 atomic_t conn_count;
841
842
843 struct ip_vs_stats tot_stats;
844
845 int num_services;
846
847 rwlock_t rs_lock;
848
849 struct list_head dest_trash;
850
851 atomic_t ftpsvc_counter;
852 atomic_t nullsvc_counter;
853
854#ifdef CONFIG_SYSCTL
855
856 struct delayed_work defense_work;
857 int drop_rate;
858 int drop_counter;
859 atomic_t dropentry;
860
861 spinlock_t dropentry_lock;
862 spinlock_t droppacket_lock;
863 spinlock_t securetcp_lock;
864
865
866 struct ctl_table_header *sysctl_hdr;
867 struct ctl_table *sysctl_tbl;
868#endif
869
870
871 int sysctl_amemthresh;
872 int sysctl_am_droprate;
873 int sysctl_drop_entry;
874 int sysctl_drop_packet;
875 int sysctl_secure_tcp;
876#ifdef CONFIG_IP_VS_NFCT
877 int sysctl_conntrack;
878#endif
879 int sysctl_snat_reroute;
880 int sysctl_sync_ver;
881 int sysctl_sync_ports;
882 int sysctl_sync_qlen_max;
883 int sysctl_sync_sock_size;
884 int sysctl_cache_bypass;
885 int sysctl_expire_nodest_conn;
886 int sysctl_expire_quiescent_template;
887 int sysctl_sync_threshold[2];
888 unsigned int sysctl_sync_refresh_period;
889 int sysctl_sync_retries;
890 int sysctl_nat_icmp_send;
891 int sysctl_pmtu_disc;
892
893
894 int sysctl_lblc_expiration;
895 struct ctl_table_header *lblc_ctl_header;
896 struct ctl_table *lblc_ctl_table;
897
898 int sysctl_lblcr_expiration;
899 struct ctl_table_header *lblcr_ctl_header;
900 struct ctl_table *lblcr_ctl_table;
901
902 struct list_head est_list;
903 spinlock_t est_lock;
904 struct timer_list est_timer;
905
906 spinlock_t sync_lock;
907 struct ipvs_master_sync_state *ms;
908 spinlock_t sync_buff_lock;
909 struct task_struct **backup_threads;
910 int threads_mask;
911 int send_mesg_maxlen;
912 int recv_mesg_maxlen;
913 volatile int sync_state;
914 volatile int master_syncid;
915 volatile int backup_syncid;
916 struct mutex sync_mutex;
917
918 char master_mcast_ifn[IP_VS_IFNAME_MAXLEN];
919 char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN];
920
921 struct net *net;
922};
923
924#define DEFAULT_SYNC_THRESHOLD 3
925#define DEFAULT_SYNC_PERIOD 50
926#define DEFAULT_SYNC_VER 1
927#define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ)
928#define DEFAULT_SYNC_RETRIES 0
929#define IPVS_SYNC_WAKEUP_RATE 8
930#define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4)
931#define IPVS_SYNC_SEND_DELAY (HZ / 50)
932#define IPVS_SYNC_CHECK_PERIOD HZ
933#define IPVS_SYNC_FLUSH_TIME (HZ * 2)
934#define IPVS_SYNC_PORTS_MAX (1 << 6)
935
936#ifdef CONFIG_SYSCTL
937
938static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs)
939{
940 return ipvs->sysctl_sync_threshold[0];
941}
942
943static inline int sysctl_sync_period(struct netns_ipvs *ipvs)
944{
945 return ACCESS_ONCE(ipvs->sysctl_sync_threshold[1]);
946}
947
948static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs)
949{
950 return ACCESS_ONCE(ipvs->sysctl_sync_refresh_period);
951}
952
953static inline int sysctl_sync_retries(struct netns_ipvs *ipvs)
954{
955 return ipvs->sysctl_sync_retries;
956}
957
958static inline int sysctl_sync_ver(struct netns_ipvs *ipvs)
959{
960 return ipvs->sysctl_sync_ver;
961}
962
963static inline int sysctl_sync_ports(struct netns_ipvs *ipvs)
964{
965 return ACCESS_ONCE(ipvs->sysctl_sync_ports);
966}
967
968static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
969{
970 return ipvs->sysctl_sync_qlen_max;
971}
972
973static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs)
974{
975 return ipvs->sysctl_sync_sock_size;
976}
977
978static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs)
979{
980 return ipvs->sysctl_pmtu_disc;
981}
982
983#else
984
985static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs)
986{
987 return DEFAULT_SYNC_THRESHOLD;
988}
989
990static inline int sysctl_sync_period(struct netns_ipvs *ipvs)
991{
992 return DEFAULT_SYNC_PERIOD;
993}
994
995static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs)
996{
997 return DEFAULT_SYNC_REFRESH_PERIOD;
998}
999
1000static inline int sysctl_sync_retries(struct netns_ipvs *ipvs)
1001{
1002 return DEFAULT_SYNC_RETRIES & 3;
1003}
1004
1005static inline int sysctl_sync_ver(struct netns_ipvs *ipvs)
1006{
1007 return DEFAULT_SYNC_VER;
1008}
1009
1010static inline int sysctl_sync_ports(struct netns_ipvs *ipvs)
1011{
1012 return 1;
1013}
1014
1015static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
1016{
1017 return IPVS_SYNC_QLEN_MAX;
1018}
1019
1020static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs)
1021{
1022 return 0;
1023}
1024
1025static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs)
1026{
1027 return 1;
1028}
1029
1030#endif
1031
1032
1033
1034
1035
1036extern const char *ip_vs_proto_name(unsigned int proto);
1037extern void ip_vs_init_hash_table(struct list_head *table, int rows);
1038#define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t)))
1039
1040#define IP_VS_APP_TYPE_FTP 1
1041
1042
1043
1044
1045
1046
1047enum {
1048 IP_VS_DIR_INPUT = 0,
1049 IP_VS_DIR_OUTPUT,
1050 IP_VS_DIR_INPUT_ONLY,
1051 IP_VS_DIR_LAST,
1052};
1053
1054static inline void ip_vs_conn_fill_param(struct net *net, int af, int protocol,
1055 const union nf_inet_addr *caddr,
1056 __be16 cport,
1057 const union nf_inet_addr *vaddr,
1058 __be16 vport,
1059 struct ip_vs_conn_param *p)
1060{
1061 p->net = net;
1062 p->af = af;
1063 p->protocol = protocol;
1064 p->caddr = caddr;
1065 p->cport = cport;
1066 p->vaddr = vaddr;
1067 p->vport = vport;
1068 p->pe = NULL;
1069 p->pe_data = NULL;
1070}
1071
1072struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p);
1073struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p);
1074
1075struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb,
1076 const struct ip_vs_iphdr *iph,
1077 unsigned int proto_off,
1078 int inverse);
1079
1080struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p);
1081
1082struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb,
1083 const struct ip_vs_iphdr *iph,
1084 unsigned int proto_off,
1085 int inverse);
1086
1087
1088static inline void __ip_vs_conn_put(struct ip_vs_conn *cp)
1089{
1090 atomic_dec(&cp->refcnt);
1091}
1092extern void ip_vs_conn_put(struct ip_vs_conn *cp);
1093extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport);
1094
1095struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p,
1096 const union nf_inet_addr *daddr,
1097 __be16 dport, unsigned int flags,
1098 struct ip_vs_dest *dest, __u32 fwmark);
1099extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp);
1100
1101extern const char * ip_vs_state_name(__u16 proto, int state);
1102
1103extern void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp);
1104extern int ip_vs_check_template(struct ip_vs_conn *ct);
1105extern void ip_vs_random_dropentry(struct net *net);
1106extern int ip_vs_conn_init(void);
1107extern void ip_vs_conn_cleanup(void);
1108
1109static inline void ip_vs_control_del(struct ip_vs_conn *cp)
1110{
1111 struct ip_vs_conn *ctl_cp = cp->control;
1112 if (!ctl_cp) {
1113 IP_VS_ERR_BUF("request control DEL for uncontrolled: "
1114 "%s:%d to %s:%d\n",
1115 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1116 ntohs(cp->cport),
1117 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1118 ntohs(cp->vport));
1119
1120 return;
1121 }
1122
1123 IP_VS_DBG_BUF(7, "DELeting control for: "
1124 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1125 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1126 ntohs(cp->cport),
1127 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
1128 ntohs(ctl_cp->cport));
1129
1130 cp->control = NULL;
1131 if (atomic_read(&ctl_cp->n_control) == 0) {
1132 IP_VS_ERR_BUF("BUG control DEL with n=0 : "
1133 "%s:%d to %s:%d\n",
1134 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1135 ntohs(cp->cport),
1136 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1137 ntohs(cp->vport));
1138
1139 return;
1140 }
1141 atomic_dec(&ctl_cp->n_control);
1142}
1143
1144static inline void
1145ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp)
1146{
1147 if (cp->control) {
1148 IP_VS_ERR_BUF("request control ADD for already controlled: "
1149 "%s:%d to %s:%d\n",
1150 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1151 ntohs(cp->cport),
1152 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1153 ntohs(cp->vport));
1154
1155 ip_vs_control_del(cp);
1156 }
1157
1158 IP_VS_DBG_BUF(7, "ADDing control for: "
1159 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1160 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1161 ntohs(cp->cport),
1162 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
1163 ntohs(ctl_cp->cport));
1164
1165 cp->control = ctl_cp;
1166 atomic_inc(&ctl_cp->n_control);
1167}
1168
1169
1170
1171
1172extern int ip_vs_estimator_net_init(struct net *net);
1173extern int ip_vs_control_net_init(struct net *net);
1174extern int ip_vs_protocol_net_init(struct net *net);
1175extern int ip_vs_app_net_init(struct net *net);
1176extern int ip_vs_conn_net_init(struct net *net);
1177extern int ip_vs_sync_net_init(struct net *net);
1178extern void ip_vs_conn_net_cleanup(struct net *net);
1179extern void ip_vs_app_net_cleanup(struct net *net);
1180extern void ip_vs_protocol_net_cleanup(struct net *net);
1181extern void ip_vs_control_net_cleanup(struct net *net);
1182extern void ip_vs_estimator_net_cleanup(struct net *net);
1183extern void ip_vs_sync_net_cleanup(struct net *net);
1184extern void ip_vs_service_net_cleanup(struct net *net);
1185
1186
1187
1188
1189
1190#define IP_VS_APP_MAX_PORTS 8
1191extern struct ip_vs_app *register_ip_vs_app(struct net *net,
1192 struct ip_vs_app *app);
1193extern void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app);
1194extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1195extern void ip_vs_unbind_app(struct ip_vs_conn *cp);
1196extern int register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app,
1197 __u16 proto, __u16 port);
1198extern int ip_vs_app_inc_get(struct ip_vs_app *inc);
1199extern void ip_vs_app_inc_put(struct ip_vs_app *inc);
1200
1201extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb);
1202extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb);
1203
1204void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe);
1205void ip_vs_unbind_pe(struct ip_vs_service *svc);
1206int register_ip_vs_pe(struct ip_vs_pe *pe);
1207int unregister_ip_vs_pe(struct ip_vs_pe *pe);
1208struct ip_vs_pe *ip_vs_pe_getbyname(const char *name);
1209struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name);
1210
1211
1212
1213
1214#define ip_vs_pe_get(pe) \
1215 if (pe && pe->module) \
1216 __module_get(pe->module);
1217
1218#define ip_vs_pe_put(pe) \
1219 if (pe && pe->module) \
1220 module_put(pe->module);
1221
1222
1223
1224
1225extern int ip_vs_protocol_init(void);
1226extern void ip_vs_protocol_cleanup(void);
1227extern void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags);
1228extern int *ip_vs_create_timeout_table(int *table, int size);
1229extern int
1230ip_vs_set_state_timeout(int *table, int num, const char *const *names,
1231 const char *name, int to);
1232extern void
1233ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp,
1234 const struct sk_buff *skb,
1235 int offset, const char *msg);
1236
1237extern struct ip_vs_protocol ip_vs_protocol_tcp;
1238extern struct ip_vs_protocol ip_vs_protocol_udp;
1239extern struct ip_vs_protocol ip_vs_protocol_icmp;
1240extern struct ip_vs_protocol ip_vs_protocol_esp;
1241extern struct ip_vs_protocol ip_vs_protocol_ah;
1242extern struct ip_vs_protocol ip_vs_protocol_sctp;
1243
1244
1245
1246
1247
1248extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
1249extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
1250extern int ip_vs_bind_scheduler(struct ip_vs_service *svc,
1251 struct ip_vs_scheduler *scheduler);
1252extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc);
1253extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name);
1254extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler);
1255extern struct ip_vs_conn *
1256ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
1257 struct ip_vs_proto_data *pd, int *ignored);
1258extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
1259 struct ip_vs_proto_data *pd);
1260
1261extern void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg);
1262
1263
1264
1265
1266
1267extern struct ip_vs_stats ip_vs_stats;
1268extern int sysctl_ip_vs_sync_ver;
1269
1270extern struct ip_vs_service *
1271ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol,
1272 const union nf_inet_addr *vaddr, __be16 vport);
1273
1274static inline void ip_vs_service_put(struct ip_vs_service *svc)
1275{
1276 atomic_dec(&svc->usecnt);
1277}
1278
1279extern struct ip_vs_dest *
1280ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol,
1281 const union nf_inet_addr *daddr, __be16 dport);
1282
1283extern int ip_vs_use_count_inc(void);
1284extern void ip_vs_use_count_dec(void);
1285extern int ip_vs_register_nl_ioctl(void);
1286extern void ip_vs_unregister_nl_ioctl(void);
1287extern int ip_vs_control_init(void);
1288extern void ip_vs_control_cleanup(void);
1289extern struct ip_vs_dest *
1290ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr,
1291 __be16 dport, const union nf_inet_addr *vaddr, __be16 vport,
1292 __u16 protocol, __u32 fwmark, __u32 flags);
1293extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp);
1294
1295
1296
1297
1298
1299
1300extern int start_sync_thread(struct net *net, int state, char *mcast_ifn,
1301 __u8 syncid);
1302extern int stop_sync_thread(struct net *net, int state);
1303extern void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp, int pkts);
1304
1305
1306
1307
1308
1309extern void ip_vs_start_estimator(struct net *net, struct ip_vs_stats *stats);
1310extern void ip_vs_stop_estimator(struct net *net, struct ip_vs_stats *stats);
1311extern void ip_vs_zero_estimator(struct ip_vs_stats *stats);
1312extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst,
1313 struct ip_vs_stats *stats);
1314
1315
1316
1317
1318extern int ip_vs_null_xmit
1319(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1320extern int ip_vs_bypass_xmit
1321(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1322extern int ip_vs_nat_xmit
1323(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1324extern int ip_vs_tunnel_xmit
1325(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1326extern int ip_vs_dr_xmit
1327(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1328extern int ip_vs_icmp_xmit
1329(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp,
1330 int offset, unsigned int hooknum);
1331extern void ip_vs_dst_reset(struct ip_vs_dest *dest);
1332
1333#ifdef CONFIG_IP_VS_IPV6
1334extern int ip_vs_bypass_xmit_v6
1335(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1336extern int ip_vs_nat_xmit_v6
1337(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1338extern int ip_vs_tunnel_xmit_v6
1339(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1340extern int ip_vs_dr_xmit_v6
1341(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1342extern int ip_vs_icmp_xmit_v6
1343(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp,
1344 int offset, unsigned int hooknum);
1345#endif
1346
1347#ifdef CONFIG_SYSCTL
1348
1349
1350
1351
1352
1353
1354static inline int ip_vs_todrop(struct netns_ipvs *ipvs)
1355{
1356 if (!ipvs->drop_rate)
1357 return 0;
1358 if (--ipvs->drop_counter > 0)
1359 return 0;
1360 ipvs->drop_counter = ipvs->drop_rate;
1361 return 1;
1362}
1363#else
1364static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; }
1365#endif
1366
1367
1368
1369
1370#define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK)
1371
1372static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp)
1373{
1374 char fwd;
1375
1376 switch (IP_VS_FWD_METHOD(cp)) {
1377 case IP_VS_CONN_F_MASQ:
1378 fwd = 'M'; break;
1379 case IP_VS_CONN_F_LOCALNODE:
1380 fwd = 'L'; break;
1381 case IP_VS_CONN_F_TUNNEL:
1382 fwd = 'T'; break;
1383 case IP_VS_CONN_F_DROUTE:
1384 fwd = 'R'; break;
1385 case IP_VS_CONN_F_BYPASS:
1386 fwd = 'B'; break;
1387 default:
1388 fwd = '?'; break;
1389 }
1390 return fwd;
1391}
1392
1393extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
1394 struct ip_vs_conn *cp, int dir);
1395
1396#ifdef CONFIG_IP_VS_IPV6
1397extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp,
1398 struct ip_vs_conn *cp, int dir);
1399#endif
1400
1401extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset);
1402
1403static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum)
1404{
1405 __be32 diff[2] = { ~old, new };
1406
1407 return csum_partial(diff, sizeof(diff), oldsum);
1408}
1409
1410#ifdef CONFIG_IP_VS_IPV6
1411static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new,
1412 __wsum oldsum)
1413{
1414 __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0],
1415 new[3], new[2], new[1], new[0] };
1416
1417 return csum_partial(diff, sizeof(diff), oldsum);
1418}
1419#endif
1420
1421static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum)
1422{
1423 __be16 diff[2] = { ~old, new };
1424
1425 return csum_partial(diff, sizeof(diff), oldsum);
1426}
1427
1428
1429
1430
1431static inline void ip_vs_notrack(struct sk_buff *skb)
1432{
1433#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1434 enum ip_conntrack_info ctinfo;
1435 struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
1436
1437 if (!ct || !nf_ct_is_untracked(ct)) {
1438 nf_conntrack_put(skb->nfct);
1439 skb->nfct = &nf_ct_untracked_get()->ct_general;
1440 skb->nfctinfo = IP_CT_NEW;
1441 nf_conntrack_get(skb->nfct);
1442 }
1443#endif
1444}
1445
1446#ifdef CONFIG_IP_VS_NFCT
1447
1448
1449
1450
1451static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs)
1452{
1453#ifdef CONFIG_SYSCTL
1454 return ipvs->sysctl_conntrack;
1455#else
1456 return 0;
1457#endif
1458}
1459
1460extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp,
1461 int outin);
1462extern int ip_vs_confirm_conntrack(struct sk_buff *skb);
1463extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct,
1464 struct ip_vs_conn *cp, u_int8_t proto,
1465 const __be16 port, int from_rs);
1466extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp);
1467
1468#else
1469
1470static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs)
1471{
1472 return 0;
1473}
1474
1475static inline void ip_vs_update_conntrack(struct sk_buff *skb,
1476 struct ip_vs_conn *cp, int outin)
1477{
1478}
1479
1480static inline int ip_vs_confirm_conntrack(struct sk_buff *skb)
1481{
1482 return NF_ACCEPT;
1483}
1484
1485static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp)
1486{
1487}
1488
1489#endif
1490
1491static inline unsigned int
1492ip_vs_dest_conn_overhead(struct ip_vs_dest *dest)
1493{
1494
1495
1496
1497
1498
1499
1500
1501 return (atomic_read(&dest->activeconns) << 8) +
1502 atomic_read(&dest->inactconns);
1503}
1504
1505#endif
1506