1
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4
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/sysctl.h>
14#include <linux/list.h>
15#include <linux/spinlock.h>
16#include <linux/atomic.h>
17#include <linux/compiler.h>
18#include <linux/timer.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 ipv6_addr_copy(&iphdr->saddr.in6, &iph->saddr);
123 ipv6_addr_copy(&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 ipv6_addr_copy(&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 void (*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
508
509 struct ip_vs_conn *control;
510 atomic_t n_control;
511 struct ip_vs_dest *dest;
512 atomic_t in_pkts;
513
514
515
516
517
518
519 int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp,
520 struct ip_vs_protocol *pp);
521
522
523
524
525 struct ip_vs_app *app;
526 void *app_data;
527 struct ip_vs_seq in_seq;
528 struct ip_vs_seq out_seq;
529
530 const struct ip_vs_pe *pe;
531 char *pe_data;
532 __u8 pe_data_len;
533};
534
535
536
537
538static inline struct net *ip_vs_conn_net(const struct ip_vs_conn *cp)
539{
540#ifdef CONFIG_NET_NS
541 return cp->net;
542#else
543 return &init_net;
544#endif
545}
546static inline void ip_vs_conn_net_set(struct ip_vs_conn *cp, struct net *net)
547{
548#ifdef CONFIG_NET_NS
549 cp->net = net;
550#endif
551}
552
553static inline int ip_vs_conn_net_eq(const struct ip_vs_conn *cp,
554 struct net *net)
555{
556#ifdef CONFIG_NET_NS
557 return cp->net == net;
558#else
559 return 1;
560#endif
561}
562
563
564
565
566
567
568
569
570
571struct ip_vs_service_user_kern {
572
573 u16 af;
574 u16 protocol;
575 union nf_inet_addr addr;
576 u16 port;
577 u32 fwmark;
578
579
580 char *sched_name;
581 char *pe_name;
582 unsigned flags;
583 unsigned timeout;
584 u32 netmask;
585};
586
587
588struct ip_vs_dest_user_kern {
589
590 union nf_inet_addr addr;
591 u16 port;
592
593
594 unsigned conn_flags;
595 int weight;
596
597
598 u32 u_threshold;
599 u32 l_threshold;
600};
601
602
603
604
605
606
607struct ip_vs_service {
608 struct list_head s_list;
609 struct list_head f_list;
610 atomic_t refcnt;
611 atomic_t usecnt;
612
613 u16 af;
614 __u16 protocol;
615 union nf_inet_addr addr;
616 __be16 port;
617 __u32 fwmark;
618 unsigned flags;
619 unsigned timeout;
620 __be32 netmask;
621 struct net *net;
622
623 struct list_head destinations;
624 __u32 num_dests;
625 struct ip_vs_stats stats;
626 struct ip_vs_app *inc;
627
628
629 struct ip_vs_scheduler *scheduler;
630 rwlock_t sched_lock;
631 void *sched_data;
632
633
634 struct ip_vs_pe *pe;
635};
636
637
638
639
640
641
642struct ip_vs_dest {
643 struct list_head n_list;
644 struct list_head d_list;
645
646 u16 af;
647 __be16 port;
648 union nf_inet_addr addr;
649 volatile unsigned flags;
650 atomic_t conn_flags;
651 atomic_t weight;
652
653 atomic_t refcnt;
654 struct ip_vs_stats stats;
655
656
657 atomic_t activeconns;
658 atomic_t inactconns;
659 atomic_t persistconns;
660 __u32 u_threshold;
661 __u32 l_threshold;
662
663
664 spinlock_t dst_lock;
665 struct dst_entry *dst_cache;
666 u32 dst_rtos;
667 u32 dst_cookie;
668 union nf_inet_addr dst_saddr;
669
670
671 struct ip_vs_service *svc;
672 __u16 protocol;
673 __be16 vport;
674 union nf_inet_addr vaddr;
675 __u32 vfwmark;
676};
677
678
679
680
681
682struct ip_vs_scheduler {
683 struct list_head n_list;
684 char *name;
685 atomic_t refcnt;
686 struct module *module;
687
688
689 int (*init_service)(struct ip_vs_service *svc);
690
691 int (*done_service)(struct ip_vs_service *svc);
692
693 int (*update_service)(struct ip_vs_service *svc);
694
695
696 struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc,
697 const struct sk_buff *skb);
698};
699
700
701struct ip_vs_pe {
702 struct list_head n_list;
703 char *name;
704 atomic_t refcnt;
705 struct module *module;
706
707
708 int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb);
709 bool (*ct_match)(const struct ip_vs_conn_param *p,
710 struct ip_vs_conn *ct);
711 u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval,
712 bool inverse);
713 int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf);
714};
715
716
717
718
719struct ip_vs_app {
720 struct list_head a_list;
721 int type;
722 char *name;
723 __u16 protocol;
724 struct module *module;
725 struct list_head incs_list;
726
727
728 struct list_head p_list;
729 struct ip_vs_app *app;
730 __be16 port;
731 atomic_t usecnt;
732
733
734
735
736
737
738 int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *,
739 struct sk_buff *, int *diff);
740
741
742
743
744
745
746 int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *,
747 struct sk_buff *, int *diff);
748
749
750 int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *);
751
752
753 int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *);
754
755
756
757 int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *,
758 struct ip_vs_protocol *);
759
760 void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *);
761
762 int * timeout_table;
763 int * timeouts;
764 int timeouts_size;
765
766 int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app,
767 int *verdict, struct ip_vs_conn **cpp);
768
769 struct ip_vs_conn *
770 (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app,
771 const struct iphdr *iph, unsigned int proto_off,
772 int inverse);
773
774 struct ip_vs_conn *
775 (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app,
776 const struct iphdr *iph, unsigned int proto_off,
777 int inverse);
778
779 int (*state_transition)(struct ip_vs_conn *cp, int direction,
780 const struct sk_buff *skb,
781 struct ip_vs_app *app);
782
783 void (*timeout_change)(struct ip_vs_app *app, int flags);
784};
785
786
787struct netns_ipvs {
788 int gen;
789 int enable;
790
791
792
793 #define IP_VS_RTAB_BITS 4
794 #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
795 #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
796
797 struct list_head rs_table[IP_VS_RTAB_SIZE];
798
799 struct list_head app_list;
800
801 struct ip_vs_app *ftp_app;
802
803 #define IP_VS_PROTO_TAB_SIZE 32
804 struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE];
805
806#ifdef CONFIG_IP_VS_PROTO_TCP
807 #define TCP_APP_TAB_BITS 4
808 #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS)
809 #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1)
810 struct list_head tcp_apps[TCP_APP_TAB_SIZE];
811 spinlock_t tcp_app_lock;
812#endif
813
814#ifdef CONFIG_IP_VS_PROTO_UDP
815 #define UDP_APP_TAB_BITS 4
816 #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS)
817 #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1)
818 struct list_head udp_apps[UDP_APP_TAB_SIZE];
819 spinlock_t udp_app_lock;
820#endif
821
822#ifdef CONFIG_IP_VS_PROTO_SCTP
823 #define SCTP_APP_TAB_BITS 4
824 #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS)
825 #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1)
826
827 struct list_head sctp_apps[SCTP_APP_TAB_SIZE];
828 spinlock_t sctp_app_lock;
829#endif
830
831 atomic_t conn_count;
832
833
834 struct ip_vs_stats tot_stats;
835
836 int num_services;
837
838 rwlock_t rs_lock;
839
840 struct list_head dest_trash;
841
842 atomic_t ftpsvc_counter;
843 atomic_t nullsvc_counter;
844
845#ifdef CONFIG_SYSCTL
846
847 struct delayed_work defense_work;
848 int drop_rate;
849 int drop_counter;
850 atomic_t dropentry;
851
852 spinlock_t dropentry_lock;
853 spinlock_t droppacket_lock;
854 spinlock_t securetcp_lock;
855
856
857 struct ctl_table_header *sysctl_hdr;
858 struct ctl_table *sysctl_tbl;
859#endif
860
861
862 int sysctl_amemthresh;
863 int sysctl_am_droprate;
864 int sysctl_drop_entry;
865 int sysctl_drop_packet;
866 int sysctl_secure_tcp;
867#ifdef CONFIG_IP_VS_NFCT
868 int sysctl_conntrack;
869#endif
870 int sysctl_snat_reroute;
871 int sysctl_sync_ver;
872 int sysctl_cache_bypass;
873 int sysctl_expire_nodest_conn;
874 int sysctl_expire_quiescent_template;
875 int sysctl_sync_threshold[2];
876 int sysctl_nat_icmp_send;
877
878
879 int sysctl_lblc_expiration;
880 struct ctl_table_header *lblc_ctl_header;
881 struct ctl_table *lblc_ctl_table;
882
883 int sysctl_lblcr_expiration;
884 struct ctl_table_header *lblcr_ctl_header;
885 struct ctl_table *lblcr_ctl_table;
886
887 struct list_head est_list;
888 spinlock_t est_lock;
889 struct timer_list est_timer;
890
891 struct list_head sync_queue;
892 spinlock_t sync_lock;
893 struct ip_vs_sync_buff *sync_buff;
894 spinlock_t sync_buff_lock;
895 struct sockaddr_in sync_mcast_addr;
896 struct task_struct *master_thread;
897 struct task_struct *backup_thread;
898 int send_mesg_maxlen;
899 int recv_mesg_maxlen;
900 volatile int sync_state;
901 volatile int master_syncid;
902 volatile int backup_syncid;
903 struct mutex sync_mutex;
904
905 char master_mcast_ifn[IP_VS_IFNAME_MAXLEN];
906 char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN];
907
908 struct net *net;
909};
910
911#define DEFAULT_SYNC_THRESHOLD 3
912#define DEFAULT_SYNC_PERIOD 50
913#define DEFAULT_SYNC_VER 1
914
915#ifdef CONFIG_SYSCTL
916
917static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs)
918{
919 return ipvs->sysctl_sync_threshold[0];
920}
921
922static inline int sysctl_sync_period(struct netns_ipvs *ipvs)
923{
924 return ipvs->sysctl_sync_threshold[1];
925}
926
927static inline int sysctl_sync_ver(struct netns_ipvs *ipvs)
928{
929 return ipvs->sysctl_sync_ver;
930}
931
932#else
933
934static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs)
935{
936 return DEFAULT_SYNC_THRESHOLD;
937}
938
939static inline int sysctl_sync_period(struct netns_ipvs *ipvs)
940{
941 return DEFAULT_SYNC_PERIOD;
942}
943
944static inline int sysctl_sync_ver(struct netns_ipvs *ipvs)
945{
946 return DEFAULT_SYNC_VER;
947}
948
949#endif
950
951
952
953
954
955extern const char *ip_vs_proto_name(unsigned proto);
956extern void ip_vs_init_hash_table(struct list_head *table, int rows);
957#define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t)))
958
959#define IP_VS_APP_TYPE_FTP 1
960
961
962
963
964
965
966enum {
967 IP_VS_DIR_INPUT = 0,
968 IP_VS_DIR_OUTPUT,
969 IP_VS_DIR_INPUT_ONLY,
970 IP_VS_DIR_LAST,
971};
972
973static inline void ip_vs_conn_fill_param(struct net *net, int af, int protocol,
974 const union nf_inet_addr *caddr,
975 __be16 cport,
976 const union nf_inet_addr *vaddr,
977 __be16 vport,
978 struct ip_vs_conn_param *p)
979{
980 p->net = net;
981 p->af = af;
982 p->protocol = protocol;
983 p->caddr = caddr;
984 p->cport = cport;
985 p->vaddr = vaddr;
986 p->vport = vport;
987 p->pe = NULL;
988 p->pe_data = NULL;
989}
990
991struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p);
992struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p);
993
994struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb,
995 const struct ip_vs_iphdr *iph,
996 unsigned int proto_off,
997 int inverse);
998
999struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p);
1000
1001struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb,
1002 const struct ip_vs_iphdr *iph,
1003 unsigned int proto_off,
1004 int inverse);
1005
1006
1007static inline void __ip_vs_conn_put(struct ip_vs_conn *cp)
1008{
1009 atomic_dec(&cp->refcnt);
1010}
1011extern void ip_vs_conn_put(struct ip_vs_conn *cp);
1012extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport);
1013
1014struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p,
1015 const union nf_inet_addr *daddr,
1016 __be16 dport, unsigned flags,
1017 struct ip_vs_dest *dest, __u32 fwmark);
1018extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp);
1019
1020extern const char * ip_vs_state_name(__u16 proto, int state);
1021
1022extern void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp);
1023extern int ip_vs_check_template(struct ip_vs_conn *ct);
1024extern void ip_vs_random_dropentry(struct net *net);
1025extern int ip_vs_conn_init(void);
1026extern void ip_vs_conn_cleanup(void);
1027
1028static inline void ip_vs_control_del(struct ip_vs_conn *cp)
1029{
1030 struct ip_vs_conn *ctl_cp = cp->control;
1031 if (!ctl_cp) {
1032 IP_VS_ERR_BUF("request control DEL for uncontrolled: "
1033 "%s:%d to %s:%d\n",
1034 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1035 ntohs(cp->cport),
1036 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1037 ntohs(cp->vport));
1038
1039 return;
1040 }
1041
1042 IP_VS_DBG_BUF(7, "DELeting control for: "
1043 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1044 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1045 ntohs(cp->cport),
1046 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
1047 ntohs(ctl_cp->cport));
1048
1049 cp->control = NULL;
1050 if (atomic_read(&ctl_cp->n_control) == 0) {
1051 IP_VS_ERR_BUF("BUG control DEL with n=0 : "
1052 "%s:%d to %s:%d\n",
1053 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1054 ntohs(cp->cport),
1055 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1056 ntohs(cp->vport));
1057
1058 return;
1059 }
1060 atomic_dec(&ctl_cp->n_control);
1061}
1062
1063static inline void
1064ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp)
1065{
1066 if (cp->control) {
1067 IP_VS_ERR_BUF("request control ADD for already controlled: "
1068 "%s:%d to %s:%d\n",
1069 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1070 ntohs(cp->cport),
1071 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1072 ntohs(cp->vport));
1073
1074 ip_vs_control_del(cp);
1075 }
1076
1077 IP_VS_DBG_BUF(7, "ADDing control for: "
1078 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1079 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1080 ntohs(cp->cport),
1081 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
1082 ntohs(ctl_cp->cport));
1083
1084 cp->control = ctl_cp;
1085 atomic_inc(&ctl_cp->n_control);
1086}
1087
1088
1089
1090
1091extern int ip_vs_estimator_net_init(struct net *net);
1092extern int ip_vs_control_net_init(struct net *net);
1093extern int ip_vs_protocol_net_init(struct net *net);
1094extern int ip_vs_app_net_init(struct net *net);
1095extern int ip_vs_conn_net_init(struct net *net);
1096extern int ip_vs_sync_net_init(struct net *net);
1097extern void ip_vs_conn_net_cleanup(struct net *net);
1098extern void ip_vs_app_net_cleanup(struct net *net);
1099extern void ip_vs_protocol_net_cleanup(struct net *net);
1100extern void ip_vs_control_net_cleanup(struct net *net);
1101extern void ip_vs_estimator_net_cleanup(struct net *net);
1102extern void ip_vs_sync_net_cleanup(struct net *net);
1103extern void ip_vs_service_net_cleanup(struct net *net);
1104
1105
1106
1107
1108
1109#define IP_VS_APP_MAX_PORTS 8
1110extern int register_ip_vs_app(struct net *net, struct ip_vs_app *app);
1111extern void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app);
1112extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1113extern void ip_vs_unbind_app(struct ip_vs_conn *cp);
1114extern int register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app,
1115 __u16 proto, __u16 port);
1116extern int ip_vs_app_inc_get(struct ip_vs_app *inc);
1117extern void ip_vs_app_inc_put(struct ip_vs_app *inc);
1118
1119extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb);
1120extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb);
1121
1122void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe);
1123void ip_vs_unbind_pe(struct ip_vs_service *svc);
1124int register_ip_vs_pe(struct ip_vs_pe *pe);
1125int unregister_ip_vs_pe(struct ip_vs_pe *pe);
1126struct ip_vs_pe *ip_vs_pe_getbyname(const char *name);
1127struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name);
1128
1129
1130
1131
1132#define ip_vs_pe_get(pe) \
1133 if (pe && pe->module) \
1134 __module_get(pe->module);
1135
1136#define ip_vs_pe_put(pe) \
1137 if (pe && pe->module) \
1138 module_put(pe->module);
1139
1140
1141
1142
1143extern int ip_vs_protocol_init(void);
1144extern void ip_vs_protocol_cleanup(void);
1145extern void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags);
1146extern int *ip_vs_create_timeout_table(int *table, int size);
1147extern int
1148ip_vs_set_state_timeout(int *table, int num, const char *const *names,
1149 const char *name, int to);
1150extern void
1151ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp,
1152 const struct sk_buff *skb,
1153 int offset, const char *msg);
1154
1155extern struct ip_vs_protocol ip_vs_protocol_tcp;
1156extern struct ip_vs_protocol ip_vs_protocol_udp;
1157extern struct ip_vs_protocol ip_vs_protocol_icmp;
1158extern struct ip_vs_protocol ip_vs_protocol_esp;
1159extern struct ip_vs_protocol ip_vs_protocol_ah;
1160extern struct ip_vs_protocol ip_vs_protocol_sctp;
1161
1162
1163
1164
1165
1166extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
1167extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
1168extern int ip_vs_bind_scheduler(struct ip_vs_service *svc,
1169 struct ip_vs_scheduler *scheduler);
1170extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc);
1171extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name);
1172extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler);
1173extern struct ip_vs_conn *
1174ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
1175 struct ip_vs_proto_data *pd, int *ignored);
1176extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
1177 struct ip_vs_proto_data *pd);
1178
1179extern void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg);
1180
1181
1182
1183
1184
1185extern struct ip_vs_stats ip_vs_stats;
1186extern const struct ctl_path net_vs_ctl_path[];
1187extern int sysctl_ip_vs_sync_ver;
1188
1189extern void ip_vs_sync_switch_mode(struct net *net, int mode);
1190extern struct ip_vs_service *
1191ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol,
1192 const union nf_inet_addr *vaddr, __be16 vport);
1193
1194static inline void ip_vs_service_put(struct ip_vs_service *svc)
1195{
1196 atomic_dec(&svc->usecnt);
1197}
1198
1199extern struct ip_vs_dest *
1200ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol,
1201 const union nf_inet_addr *daddr, __be16 dport);
1202
1203extern int ip_vs_use_count_inc(void);
1204extern void ip_vs_use_count_dec(void);
1205extern int ip_vs_control_init(void);
1206extern void ip_vs_control_cleanup(void);
1207extern struct ip_vs_dest *
1208ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr,
1209 __be16 dport, const union nf_inet_addr *vaddr, __be16 vport,
1210 __u16 protocol, __u32 fwmark, __u32 flags);
1211extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp);
1212
1213
1214
1215
1216
1217
1218extern int start_sync_thread(struct net *net, int state, char *mcast_ifn,
1219 __u8 syncid);
1220extern int stop_sync_thread(struct net *net, int state);
1221extern void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp);
1222
1223
1224
1225
1226
1227extern void ip_vs_start_estimator(struct net *net, struct ip_vs_stats *stats);
1228extern void ip_vs_stop_estimator(struct net *net, struct ip_vs_stats *stats);
1229extern void ip_vs_zero_estimator(struct ip_vs_stats *stats);
1230extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst,
1231 struct ip_vs_stats *stats);
1232
1233
1234
1235
1236extern int ip_vs_null_xmit
1237(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1238extern int ip_vs_bypass_xmit
1239(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1240extern int ip_vs_nat_xmit
1241(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1242extern int ip_vs_tunnel_xmit
1243(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1244extern int ip_vs_dr_xmit
1245(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1246extern int ip_vs_icmp_xmit
1247(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp,
1248 int offset, unsigned int hooknum);
1249extern void ip_vs_dst_reset(struct ip_vs_dest *dest);
1250
1251#ifdef CONFIG_IP_VS_IPV6
1252extern int ip_vs_bypass_xmit_v6
1253(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1254extern int ip_vs_nat_xmit_v6
1255(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1256extern int ip_vs_tunnel_xmit_v6
1257(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1258extern int ip_vs_dr_xmit_v6
1259(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1260extern int ip_vs_icmp_xmit_v6
1261(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp,
1262 int offset, unsigned int hooknum);
1263#endif
1264
1265#ifdef CONFIG_SYSCTL
1266
1267
1268
1269
1270
1271
1272static inline int ip_vs_todrop(struct netns_ipvs *ipvs)
1273{
1274 if (!ipvs->drop_rate)
1275 return 0;
1276 if (--ipvs->drop_counter > 0)
1277 return 0;
1278 ipvs->drop_counter = ipvs->drop_rate;
1279 return 1;
1280}
1281#else
1282static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; }
1283#endif
1284
1285
1286
1287
1288#define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK)
1289
1290static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp)
1291{
1292 char fwd;
1293
1294 switch (IP_VS_FWD_METHOD(cp)) {
1295 case IP_VS_CONN_F_MASQ:
1296 fwd = 'M'; break;
1297 case IP_VS_CONN_F_LOCALNODE:
1298 fwd = 'L'; break;
1299 case IP_VS_CONN_F_TUNNEL:
1300 fwd = 'T'; break;
1301 case IP_VS_CONN_F_DROUTE:
1302 fwd = 'R'; break;
1303 case IP_VS_CONN_F_BYPASS:
1304 fwd = 'B'; break;
1305 default:
1306 fwd = '?'; break;
1307 }
1308 return fwd;
1309}
1310
1311extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
1312 struct ip_vs_conn *cp, int dir);
1313
1314#ifdef CONFIG_IP_VS_IPV6
1315extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp,
1316 struct ip_vs_conn *cp, int dir);
1317#endif
1318
1319extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset);
1320
1321static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum)
1322{
1323 __be32 diff[2] = { ~old, new };
1324
1325 return csum_partial(diff, sizeof(diff), oldsum);
1326}
1327
1328#ifdef CONFIG_IP_VS_IPV6
1329static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new,
1330 __wsum oldsum)
1331{
1332 __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0],
1333 new[3], new[2], new[1], new[0] };
1334
1335 return csum_partial(diff, sizeof(diff), oldsum);
1336}
1337#endif
1338
1339static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum)
1340{
1341 __be16 diff[2] = { ~old, new };
1342
1343 return csum_partial(diff, sizeof(diff), oldsum);
1344}
1345
1346
1347
1348
1349static inline void ip_vs_notrack(struct sk_buff *skb)
1350{
1351#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1352 enum ip_conntrack_info ctinfo;
1353 struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
1354
1355 if (!ct || !nf_ct_is_untracked(ct)) {
1356 nf_reset(skb);
1357 skb->nfct = &nf_ct_untracked_get()->ct_general;
1358 skb->nfctinfo = IP_CT_NEW;
1359 nf_conntrack_get(skb->nfct);
1360 }
1361#endif
1362}
1363
1364#ifdef CONFIG_IP_VS_NFCT
1365
1366
1367
1368
1369static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs)
1370{
1371#ifdef CONFIG_SYSCTL
1372 return ipvs->sysctl_conntrack;
1373#else
1374 return 0;
1375#endif
1376}
1377
1378extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp,
1379 int outin);
1380extern int ip_vs_confirm_conntrack(struct sk_buff *skb);
1381extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct,
1382 struct ip_vs_conn *cp, u_int8_t proto,
1383 const __be16 port, int from_rs);
1384extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp);
1385
1386#else
1387
1388static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs)
1389{
1390 return 0;
1391}
1392
1393static inline void ip_vs_update_conntrack(struct sk_buff *skb,
1394 struct ip_vs_conn *cp, int outin)
1395{
1396}
1397
1398static inline int ip_vs_confirm_conntrack(struct sk_buff *skb)
1399{
1400 return NF_ACCEPT;
1401}
1402
1403static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp)
1404{
1405}
1406
1407#endif
1408
1409static inline unsigned int
1410ip_vs_dest_conn_overhead(struct ip_vs_dest *dest)
1411{
1412
1413
1414
1415
1416
1417
1418
1419 return (atomic_read(&dest->activeconns) << 8) +
1420 atomic_read(&dest->inactconns);
1421}
1422
1423#endif
1424