1
2
3
4
5#ifndef _NET_IP_VS_H
6#define _NET_IP_VS_H
7
8#include <linux/ip_vs.h>
9
10#include <asm/types.h>
11
12#include <linux/list.h>
13#include <linux/spinlock.h>
14#include <linux/atomic.h>
15#include <linux/compiler.h>
16#include <linux/timer.h>
17#include <linux/bug.h>
18
19#include <net/checksum.h>
20#include <linux/netfilter.h>
21#include <linux/ip.h>
22#include <linux/ipv6.h>
23#include <net/ipv6.h>
24#if IS_ENABLED(CONFIG_IP_VS_IPV6)
25#include <linux/netfilter_ipv6/ip6_tables.h>
26#endif
27#if IS_ENABLED(CONFIG_NF_CONNTRACK)
28#include <net/netfilter/nf_conntrack.h>
29#endif
30#include <net/net_namespace.h>
31
32#define IP_VS_HDR_INVERSE 1
33#define IP_VS_HDR_ICMP 2
34
35
36static inline struct netns_ipvs *net_ipvs(struct net* net)
37{
38 return net->ipvs;
39}
40
41
42
43
44static inline struct net *seq_file_single_net(struct seq_file *seq)
45{
46#ifdef CONFIG_NET_NS
47 return (struct net *)seq->private;
48#else
49 return &init_net;
50#endif
51}
52
53
54extern int ip_vs_conn_tab_size;
55
56struct ip_vs_iphdr {
57 int hdr_flags;
58 __u32 off;
59 __u32 len;
60
61 __u16 fragoffs;
62 __s16 protocol;
63 __s32 flags;
64 union nf_inet_addr saddr;
65 union nf_inet_addr daddr;
66};
67
68static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset,
69 int len, void *buffer,
70 const struct ip_vs_iphdr *ipvsh)
71{
72 return skb_header_pointer(skb, offset, len, buffer);
73}
74
75
76
77
78
79static inline int
80ip_vs_fill_iph_skb_off(int af, const struct sk_buff *skb, int offset,
81 int hdr_flags, struct ip_vs_iphdr *iphdr)
82{
83 iphdr->hdr_flags = hdr_flags;
84 iphdr->off = offset;
85
86#ifdef CONFIG_IP_VS_IPV6
87 if (af == AF_INET6) {
88 struct ipv6hdr _iph;
89 const struct ipv6hdr *iph = skb_header_pointer(
90 skb, offset, sizeof(_iph), &_iph);
91 if (!iph)
92 return 0;
93
94 iphdr->saddr.in6 = iph->saddr;
95 iphdr->daddr.in6 = iph->daddr;
96
97 iphdr->len = offset;
98 iphdr->flags = 0;
99 iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1,
100 &iphdr->fragoffs,
101 &iphdr->flags);
102 if (iphdr->protocol < 0)
103 return 0;
104 } else
105#endif
106 {
107 struct iphdr _iph;
108 const struct iphdr *iph = skb_header_pointer(
109 skb, offset, sizeof(_iph), &_iph);
110 if (!iph)
111 return 0;
112
113 iphdr->len = offset + iph->ihl * 4;
114 iphdr->fragoffs = 0;
115 iphdr->protocol = iph->protocol;
116 iphdr->saddr.ip = iph->saddr;
117 iphdr->daddr.ip = iph->daddr;
118 }
119
120 return 1;
121}
122
123static inline int
124ip_vs_fill_iph_skb_icmp(int af, const struct sk_buff *skb, int offset,
125 bool inverse, struct ip_vs_iphdr *iphdr)
126{
127 int hdr_flags = IP_VS_HDR_ICMP;
128
129 if (inverse)
130 hdr_flags |= IP_VS_HDR_INVERSE;
131
132 return ip_vs_fill_iph_skb_off(af, skb, offset, hdr_flags, iphdr);
133}
134
135static inline int
136ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, bool inverse,
137 struct ip_vs_iphdr *iphdr)
138{
139 int hdr_flags = 0;
140
141 if (inverse)
142 hdr_flags |= IP_VS_HDR_INVERSE;
143
144 return ip_vs_fill_iph_skb_off(af, skb, skb_network_offset(skb),
145 hdr_flags, iphdr);
146}
147
148static inline bool
149ip_vs_iph_inverse(const struct ip_vs_iphdr *iph)
150{
151 return !!(iph->hdr_flags & IP_VS_HDR_INVERSE);
152}
153
154static inline bool
155ip_vs_iph_icmp(const struct ip_vs_iphdr *iph)
156{
157 return !!(iph->hdr_flags & IP_VS_HDR_ICMP);
158}
159
160static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst,
161 const union nf_inet_addr *src)
162{
163#ifdef CONFIG_IP_VS_IPV6
164 if (af == AF_INET6)
165 dst->in6 = src->in6;
166 else
167#endif
168 dst->ip = src->ip;
169}
170
171static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst,
172 const union nf_inet_addr *src)
173{
174#ifdef CONFIG_IP_VS_IPV6
175 if (af == AF_INET6) {
176 dst->in6 = src->in6;
177 return;
178 }
179#endif
180 dst->ip = src->ip;
181 dst->all[1] = 0;
182 dst->all[2] = 0;
183 dst->all[3] = 0;
184}
185
186static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a,
187 const union nf_inet_addr *b)
188{
189#ifdef CONFIG_IP_VS_IPV6
190 if (af == AF_INET6)
191 return ipv6_addr_equal(&a->in6, &b->in6);
192#endif
193 return a->ip == b->ip;
194}
195
196#ifdef CONFIG_IP_VS_DEBUG
197#include <linux/net.h>
198
199int ip_vs_get_debug_level(void);
200
201static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len,
202 const union nf_inet_addr *addr,
203 int *idx)
204{
205 int len;
206#ifdef CONFIG_IP_VS_IPV6
207 if (af == AF_INET6)
208 len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]",
209 &addr->in6) + 1;
210 else
211#endif
212 len = snprintf(&buf[*idx], buf_len - *idx, "%pI4",
213 &addr->ip) + 1;
214
215 *idx += len;
216 BUG_ON(*idx > buf_len + 1);
217 return &buf[*idx - len];
218}
219
220#define IP_VS_DBG_BUF(level, msg, ...) \
221 do { \
222 char ip_vs_dbg_buf[160]; \
223 int ip_vs_dbg_idx = 0; \
224 if (level <= ip_vs_get_debug_level()) \
225 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
226 } while (0)
227#define IP_VS_ERR_BUF(msg...) \
228 do { \
229 char ip_vs_dbg_buf[160]; \
230 int ip_vs_dbg_idx = 0; \
231 pr_err(msg); \
232 } while (0)
233
234
235#define IP_VS_DBG_ADDR(af, addr) \
236 ip_vs_dbg_addr(af, ip_vs_dbg_buf, \
237 sizeof(ip_vs_dbg_buf), addr, \
238 &ip_vs_dbg_idx)
239
240#define IP_VS_DBG(level, msg, ...) \
241 do { \
242 if (level <= ip_vs_get_debug_level()) \
243 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
244 } while (0)
245#define IP_VS_DBG_RL(msg, ...) \
246 do { \
247 if (net_ratelimit()) \
248 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
249 } while (0)
250#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \
251 do { \
252 if (level <= ip_vs_get_debug_level()) \
253 pp->debug_packet(af, pp, skb, ofs, msg); \
254 } while (0)
255#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \
256 do { \
257 if (level <= ip_vs_get_debug_level() && \
258 net_ratelimit()) \
259 pp->debug_packet(af, pp, skb, ofs, msg); \
260 } while (0)
261#else
262#define IP_VS_DBG_BUF(level, msg...) do {} while (0)
263#define IP_VS_ERR_BUF(msg...) do {} while (0)
264#define IP_VS_DBG(level, msg...) do {} while (0)
265#define IP_VS_DBG_RL(msg...) do {} while (0)
266#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
267#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
268#endif
269
270#define IP_VS_BUG() BUG()
271#define IP_VS_ERR_RL(msg, ...) \
272 do { \
273 if (net_ratelimit()) \
274 pr_err(msg, ##__VA_ARGS__); \
275 } while (0)
276
277#ifdef CONFIG_IP_VS_DEBUG
278#define EnterFunction(level) \
279 do { \
280 if (level <= ip_vs_get_debug_level()) \
281 printk(KERN_DEBUG \
282 pr_fmt("Enter: %s, %s line %i\n"), \
283 __func__, __FILE__, __LINE__); \
284 } while (0)
285#define LeaveFunction(level) \
286 do { \
287 if (level <= ip_vs_get_debug_level()) \
288 printk(KERN_DEBUG \
289 pr_fmt("Leave: %s, %s line %i\n"), \
290 __func__, __FILE__, __LINE__); \
291 } while (0)
292#else
293#define EnterFunction(level) do {} while (0)
294#define LeaveFunction(level) do {} while (0)
295#endif
296
297
298#define FTPPORT cpu_to_be16(21)
299#define FTPDATA cpu_to_be16(20)
300
301
302enum {
303 IP_VS_TCP_S_NONE = 0,
304 IP_VS_TCP_S_ESTABLISHED,
305 IP_VS_TCP_S_SYN_SENT,
306 IP_VS_TCP_S_SYN_RECV,
307 IP_VS_TCP_S_FIN_WAIT,
308 IP_VS_TCP_S_TIME_WAIT,
309 IP_VS_TCP_S_CLOSE,
310 IP_VS_TCP_S_CLOSE_WAIT,
311 IP_VS_TCP_S_LAST_ACK,
312 IP_VS_TCP_S_LISTEN,
313 IP_VS_TCP_S_SYNACK,
314 IP_VS_TCP_S_LAST
315};
316
317
318enum {
319 IP_VS_UDP_S_NORMAL,
320 IP_VS_UDP_S_LAST,
321};
322
323
324enum {
325 IP_VS_ICMP_S_NORMAL,
326 IP_VS_ICMP_S_LAST,
327};
328
329
330enum ip_vs_sctp_states {
331 IP_VS_SCTP_S_NONE,
332 IP_VS_SCTP_S_INIT1,
333 IP_VS_SCTP_S_INIT,
334 IP_VS_SCTP_S_COOKIE_SENT,
335 IP_VS_SCTP_S_COOKIE_REPLIED,
336 IP_VS_SCTP_S_COOKIE_WAIT,
337 IP_VS_SCTP_S_COOKIE,
338 IP_VS_SCTP_S_COOKIE_ECHOED,
339 IP_VS_SCTP_S_ESTABLISHED,
340 IP_VS_SCTP_S_SHUTDOWN_SENT,
341 IP_VS_SCTP_S_SHUTDOWN_RECEIVED,
342 IP_VS_SCTP_S_SHUTDOWN_ACK_SENT,
343 IP_VS_SCTP_S_REJECTED,
344 IP_VS_SCTP_S_CLOSED,
345 IP_VS_SCTP_S_LAST
346};
347
348
349
350
351
352struct ip_vs_seq {
353 __u32 init_seq;
354 __u32 delta;
355 __u32 previous_delta;
356
357};
358
359
360struct ip_vs_counters {
361 __u64 conns;
362 __u64 inpkts;
363 __u64 outpkts;
364 __u64 inbytes;
365 __u64 outbytes;
366};
367
368struct ip_vs_cpu_stats {
369 struct ip_vs_counters cnt;
370 struct u64_stats_sync syncp;
371};
372
373
374struct ip_vs_estimator {
375 struct list_head list;
376
377 u64 last_inbytes;
378 u64 last_outbytes;
379 u64 last_conns;
380 u64 last_inpkts;
381 u64 last_outpkts;
382
383 u64 cps;
384 u64 inpps;
385 u64 outpps;
386 u64 inbps;
387 u64 outbps;
388};
389
390
391
392
393struct ip_vs_kstats {
394 u64 conns;
395 u64 inpkts;
396 u64 outpkts;
397 u64 inbytes;
398 u64 outbytes;
399
400 u64 cps;
401 u64 inpps;
402 u64 outpps;
403 u64 inbps;
404 u64 outbps;
405};
406
407struct ip_vs_stats {
408 struct ip_vs_kstats kstats;
409 struct ip_vs_estimator est;
410 struct ip_vs_cpu_stats __percpu *cpustats;
411 spinlock_t lock;
412 struct ip_vs_kstats kstats0;
413};
414
415struct dst_entry;
416struct iphdr;
417struct ip_vs_conn;
418struct ip_vs_app;
419struct sk_buff;
420struct ip_vs_proto_data;
421
422struct ip_vs_protocol {
423 struct ip_vs_protocol *next;
424 char *name;
425 u16 protocol;
426 u16 num_states;
427 int dont_defrag;
428
429 void (*init)(struct ip_vs_protocol *pp);
430
431 void (*exit)(struct ip_vs_protocol *pp);
432
433 int (*init_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd);
434
435 void (*exit_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd);
436
437 int (*conn_schedule)(struct netns_ipvs *ipvs,
438 int af, struct sk_buff *skb,
439 struct ip_vs_proto_data *pd,
440 int *verdict, struct ip_vs_conn **cpp,
441 struct ip_vs_iphdr *iph);
442
443 struct ip_vs_conn *
444 (*conn_in_get)(struct netns_ipvs *ipvs,
445 int af,
446 const struct sk_buff *skb,
447 const struct ip_vs_iphdr *iph);
448
449 struct ip_vs_conn *
450 (*conn_out_get)(struct netns_ipvs *ipvs,
451 int af,
452 const struct sk_buff *skb,
453 const struct ip_vs_iphdr *iph);
454
455 int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp,
456 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph);
457
458 int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp,
459 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph);
460
461 int (*csum_check)(int af, struct sk_buff *skb,
462 struct ip_vs_protocol *pp);
463
464 const char *(*state_name)(int state);
465
466 void (*state_transition)(struct ip_vs_conn *cp, int direction,
467 const struct sk_buff *skb,
468 struct ip_vs_proto_data *pd);
469
470 int (*register_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc);
471
472 void (*unregister_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc);
473
474 int (*app_conn_bind)(struct ip_vs_conn *cp);
475
476 void (*debug_packet)(int af, struct ip_vs_protocol *pp,
477 const struct sk_buff *skb,
478 int offset,
479 const char *msg);
480
481 void (*timeout_change)(struct ip_vs_proto_data *pd, int flags);
482};
483
484
485struct ip_vs_proto_data {
486 struct ip_vs_proto_data *next;
487 struct ip_vs_protocol *pp;
488 int *timeout_table;
489 atomic_t appcnt;
490 struct tcp_states_t *tcp_state_table;
491};
492
493struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto);
494struct ip_vs_proto_data *ip_vs_proto_data_get(struct netns_ipvs *ipvs,
495 unsigned short proto);
496
497struct ip_vs_conn_param {
498 struct netns_ipvs *ipvs;
499 const union nf_inet_addr *caddr;
500 const union nf_inet_addr *vaddr;
501 __be16 cport;
502 __be16 vport;
503 __u16 protocol;
504 u16 af;
505
506 const struct ip_vs_pe *pe;
507 char *pe_data;
508 __u8 pe_data_len;
509};
510
511
512struct ip_vs_conn {
513 struct hlist_node c_list;
514
515 __be16 cport;
516 __be16 dport;
517 __be16 vport;
518 u16 af;
519 union nf_inet_addr caddr;
520 union nf_inet_addr vaddr;
521 union nf_inet_addr daddr;
522 volatile __u32 flags;
523 __u16 protocol;
524 __u16 daf;
525 struct netns_ipvs *ipvs;
526
527
528 atomic_t refcnt;
529 struct timer_list timer;
530 volatile unsigned long timeout;
531
532
533 spinlock_t lock;
534 volatile __u16 state;
535 volatile __u16 old_state;
536
537
538
539 __u32 fwmark;
540 unsigned long sync_endtime;
541
542
543 struct ip_vs_conn *control;
544 atomic_t n_control;
545 struct ip_vs_dest *dest;
546 atomic_t in_pkts;
547
548
549
550
551
552
553 int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp,
554 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
555
556
557
558
559
560 struct ip_vs_app *app;
561 void *app_data;
562 struct ip_vs_seq in_seq;
563 struct ip_vs_seq out_seq;
564
565 const struct ip_vs_pe *pe;
566 char *pe_data;
567 __u8 pe_data_len;
568
569 struct rcu_head rcu_head;
570};
571
572
573
574
575
576
577
578
579struct ip_vs_service_user_kern {
580
581 u16 af;
582 u16 protocol;
583 union nf_inet_addr addr;
584 __be16 port;
585 u32 fwmark;
586
587
588 char *sched_name;
589 char *pe_name;
590 unsigned int flags;
591 unsigned int timeout;
592 __be32 netmask;
593};
594
595
596struct ip_vs_dest_user_kern {
597
598 union nf_inet_addr addr;
599 __be16 port;
600
601
602 unsigned int conn_flags;
603 int weight;
604
605
606 u32 u_threshold;
607 u32 l_threshold;
608
609
610 u16 af;
611};
612
613
614
615
616
617
618struct ip_vs_service {
619 struct hlist_node s_list;
620 struct hlist_node f_list;
621 atomic_t refcnt;
622
623 u16 af;
624 __u16 protocol;
625 union nf_inet_addr addr;
626 __be16 port;
627 __u32 fwmark;
628 unsigned int flags;
629 unsigned int timeout;
630 __be32 netmask;
631 struct netns_ipvs *ipvs;
632
633 struct list_head destinations;
634 __u32 num_dests;
635 struct ip_vs_stats stats;
636
637
638 struct ip_vs_scheduler __rcu *scheduler;
639 spinlock_t sched_lock;
640 void *sched_data;
641
642
643 struct ip_vs_pe __rcu *pe;
644
645 struct rcu_head rcu_head;
646};
647
648
649struct ip_vs_dest_dst {
650 struct dst_entry *dst_cache;
651 u32 dst_cookie;
652 union nf_inet_addr dst_saddr;
653 struct rcu_head rcu_head;
654};
655
656
657
658
659struct ip_vs_dest {
660 struct list_head n_list;
661 struct hlist_node d_list;
662
663 u16 af;
664 __be16 port;
665 union nf_inet_addr addr;
666 volatile unsigned int flags;
667 atomic_t conn_flags;
668 atomic_t weight;
669
670 atomic_t refcnt;
671 struct ip_vs_stats stats;
672 unsigned long idle_start;
673
674
675 atomic_t activeconns;
676 atomic_t inactconns;
677 atomic_t persistconns;
678 __u32 u_threshold;
679 __u32 l_threshold;
680
681
682 spinlock_t dst_lock;
683 struct ip_vs_dest_dst __rcu *dest_dst;
684
685
686 struct ip_vs_service __rcu *svc;
687 __u16 protocol;
688 __be16 vport;
689 union nf_inet_addr vaddr;
690 __u32 vfwmark;
691
692 struct list_head t_list;
693 unsigned int in_rs_table:1;
694};
695
696
697struct ip_vs_scheduler {
698 struct list_head n_list;
699 char *name;
700 atomic_t refcnt;
701 struct module *module;
702
703
704 int (*init_service)(struct ip_vs_service *svc);
705
706 void (*done_service)(struct ip_vs_service *svc);
707
708 int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest);
709
710 int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest);
711
712 int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest);
713
714
715 struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc,
716 const struct sk_buff *skb,
717 struct ip_vs_iphdr *iph);
718};
719
720
721struct ip_vs_pe {
722 struct list_head n_list;
723 char *name;
724 atomic_t refcnt;
725 struct module *module;
726
727
728 int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb);
729 bool (*ct_match)(const struct ip_vs_conn_param *p,
730 struct ip_vs_conn *ct);
731 u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval,
732 bool inverse);
733 int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf);
734};
735
736
737struct ip_vs_app {
738 struct list_head a_list;
739 int type;
740 char *name;
741 __u16 protocol;
742 struct module *module;
743 struct list_head incs_list;
744
745
746 struct list_head p_list;
747 struct ip_vs_app *app;
748 __be16 port;
749 atomic_t usecnt;
750 struct rcu_head rcu_head;
751
752
753
754
755
756 int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *,
757 struct sk_buff *, int *diff);
758
759
760
761
762
763 int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *,
764 struct sk_buff *, int *diff);
765
766
767 int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *);
768
769
770 int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *);
771
772
773
774 int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *,
775 struct ip_vs_protocol *);
776
777 void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *);
778
779 int * timeout_table;
780 int * timeouts;
781 int timeouts_size;
782
783 int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app,
784 int *verdict, struct ip_vs_conn **cpp);
785
786 struct ip_vs_conn *
787 (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app,
788 const struct iphdr *iph, int inverse);
789
790 struct ip_vs_conn *
791 (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app,
792 const struct iphdr *iph, int inverse);
793
794 int (*state_transition)(struct ip_vs_conn *cp, int direction,
795 const struct sk_buff *skb,
796 struct ip_vs_app *app);
797
798 void (*timeout_change)(struct ip_vs_app *app, int flags);
799};
800
801struct ipvs_master_sync_state {
802 struct list_head sync_queue;
803 struct ip_vs_sync_buff *sync_buff;
804 unsigned long sync_queue_len;
805 unsigned int sync_queue_delay;
806 struct task_struct *master_thread;
807 struct delayed_work master_wakeup_work;
808 struct netns_ipvs *ipvs;
809};
810
811
812#define IP_VS_DEST_TRASH_PERIOD (120 * HZ)
813
814struct ipvs_sync_daemon_cfg {
815 union nf_inet_addr mcast_group;
816 int syncid;
817 u16 sync_maxlen;
818 u16 mcast_port;
819 u8 mcast_af;
820 u8 mcast_ttl;
821
822 char mcast_ifn[IP_VS_IFNAME_MAXLEN];
823};
824
825
826struct netns_ipvs {
827 int gen;
828 int enable;
829
830 #define IP_VS_RTAB_BITS 4
831 #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
832 #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
833
834 struct hlist_head rs_table[IP_VS_RTAB_SIZE];
835
836 struct list_head app_list;
837
838 #define IP_VS_PROTO_TAB_SIZE 32
839 struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE];
840
841#ifdef CONFIG_IP_VS_PROTO_TCP
842 #define TCP_APP_TAB_BITS 4
843 #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS)
844 #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1)
845 struct list_head tcp_apps[TCP_APP_TAB_SIZE];
846#endif
847
848#ifdef CONFIG_IP_VS_PROTO_UDP
849 #define UDP_APP_TAB_BITS 4
850 #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS)
851 #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1)
852 struct list_head udp_apps[UDP_APP_TAB_SIZE];
853#endif
854
855#ifdef CONFIG_IP_VS_PROTO_SCTP
856 #define SCTP_APP_TAB_BITS 4
857 #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS)
858 #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1)
859
860 struct list_head sctp_apps[SCTP_APP_TAB_SIZE];
861#endif
862
863 atomic_t conn_count;
864
865
866 struct ip_vs_stats tot_stats;
867
868 int num_services;
869
870
871 struct list_head dest_trash;
872 spinlock_t dest_trash_lock;
873 struct timer_list dest_trash_timer;
874
875 atomic_t ftpsvc_counter;
876 atomic_t nullsvc_counter;
877
878#ifdef CONFIG_SYSCTL
879
880 struct delayed_work defense_work;
881 int drop_rate;
882 int drop_counter;
883 atomic_t dropentry;
884
885 spinlock_t dropentry_lock;
886 spinlock_t droppacket_lock;
887 spinlock_t securetcp_lock;
888
889
890 struct ctl_table_header *sysctl_hdr;
891 struct ctl_table *sysctl_tbl;
892#endif
893
894
895 int sysctl_amemthresh;
896 int sysctl_am_droprate;
897 int sysctl_drop_entry;
898 int sysctl_drop_packet;
899 int sysctl_secure_tcp;
900#ifdef CONFIG_IP_VS_NFCT
901 int sysctl_conntrack;
902#endif
903 int sysctl_snat_reroute;
904 int sysctl_sync_ver;
905 int sysctl_sync_ports;
906 int sysctl_sync_persist_mode;
907 unsigned long sysctl_sync_qlen_max;
908 int sysctl_sync_sock_size;
909 int sysctl_cache_bypass;
910 int sysctl_expire_nodest_conn;
911 int sysctl_sloppy_tcp;
912 int sysctl_sloppy_sctp;
913 int sysctl_expire_quiescent_template;
914 int sysctl_sync_threshold[2];
915 unsigned int sysctl_sync_refresh_period;
916 int sysctl_sync_retries;
917 int sysctl_nat_icmp_send;
918 int sysctl_pmtu_disc;
919 int sysctl_backup_only;
920 int sysctl_conn_reuse_mode;
921 int sysctl_schedule_icmp;
922 int sysctl_ignore_tunneled;
923
924
925 int sysctl_lblc_expiration;
926 struct ctl_table_header *lblc_ctl_header;
927 struct ctl_table *lblc_ctl_table;
928
929 int sysctl_lblcr_expiration;
930 struct ctl_table_header *lblcr_ctl_header;
931 struct ctl_table *lblcr_ctl_table;
932
933 struct list_head est_list;
934 spinlock_t est_lock;
935 struct timer_list est_timer;
936
937 spinlock_t sync_lock;
938 struct ipvs_master_sync_state *ms;
939 spinlock_t sync_buff_lock;
940 struct task_struct **backup_threads;
941 int threads_mask;
942 volatile int sync_state;
943 struct mutex sync_mutex;
944 struct ipvs_sync_daemon_cfg mcfg;
945 struct ipvs_sync_daemon_cfg bcfg;
946
947 struct net *net;
948
949
950
951 unsigned int mixed_address_family_dests;
952};
953
954#define DEFAULT_SYNC_THRESHOLD 3
955#define DEFAULT_SYNC_PERIOD 50
956#define DEFAULT_SYNC_VER 1
957#define DEFAULT_SLOPPY_TCP 0
958#define DEFAULT_SLOPPY_SCTP 0
959#define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ)
960#define DEFAULT_SYNC_RETRIES 0
961#define IPVS_SYNC_WAKEUP_RATE 8
962#define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4)
963#define IPVS_SYNC_SEND_DELAY (HZ / 50)
964#define IPVS_SYNC_CHECK_PERIOD HZ
965#define IPVS_SYNC_FLUSH_TIME (HZ * 2)
966#define IPVS_SYNC_PORTS_MAX (1 << 6)
967
968#ifdef CONFIG_SYSCTL
969
970static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs)
971{
972 return ipvs->sysctl_sync_threshold[0];
973}
974
975static inline int sysctl_sync_period(struct netns_ipvs *ipvs)
976{
977 return ACCESS_ONCE(ipvs->sysctl_sync_threshold[1]);
978}
979
980static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs)
981{
982 return ACCESS_ONCE(ipvs->sysctl_sync_refresh_period);
983}
984
985static inline int sysctl_sync_retries(struct netns_ipvs *ipvs)
986{
987 return ipvs->sysctl_sync_retries;
988}
989
990static inline int sysctl_sync_ver(struct netns_ipvs *ipvs)
991{
992 return ipvs->sysctl_sync_ver;
993}
994
995static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs)
996{
997 return ipvs->sysctl_sloppy_tcp;
998}
999
1000static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs)
1001{
1002 return ipvs->sysctl_sloppy_sctp;
1003}
1004
1005static inline int sysctl_sync_ports(struct netns_ipvs *ipvs)
1006{
1007 return ACCESS_ONCE(ipvs->sysctl_sync_ports);
1008}
1009
1010static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs)
1011{
1012 return ipvs->sysctl_sync_persist_mode;
1013}
1014
1015static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
1016{
1017 return ipvs->sysctl_sync_qlen_max;
1018}
1019
1020static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs)
1021{
1022 return ipvs->sysctl_sync_sock_size;
1023}
1024
1025static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs)
1026{
1027 return ipvs->sysctl_pmtu_disc;
1028}
1029
1030static inline int sysctl_backup_only(struct netns_ipvs *ipvs)
1031{
1032 return ipvs->sync_state & IP_VS_STATE_BACKUP &&
1033 ipvs->sysctl_backup_only;
1034}
1035
1036static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs)
1037{
1038 return ipvs->sysctl_conn_reuse_mode;
1039}
1040
1041static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs)
1042{
1043 return ipvs->sysctl_schedule_icmp;
1044}
1045
1046static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs)
1047{
1048 return ipvs->sysctl_ignore_tunneled;
1049}
1050
1051static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs)
1052{
1053 return ipvs->sysctl_cache_bypass;
1054}
1055
1056#else
1057
1058static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs)
1059{
1060 return DEFAULT_SYNC_THRESHOLD;
1061}
1062
1063static inline int sysctl_sync_period(struct netns_ipvs *ipvs)
1064{
1065 return DEFAULT_SYNC_PERIOD;
1066}
1067
1068static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs)
1069{
1070 return DEFAULT_SYNC_REFRESH_PERIOD;
1071}
1072
1073static inline int sysctl_sync_retries(struct netns_ipvs *ipvs)
1074{
1075 return DEFAULT_SYNC_RETRIES & 3;
1076}
1077
1078static inline int sysctl_sync_ver(struct netns_ipvs *ipvs)
1079{
1080 return DEFAULT_SYNC_VER;
1081}
1082
1083static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs)
1084{
1085 return DEFAULT_SLOPPY_TCP;
1086}
1087
1088static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs)
1089{
1090 return DEFAULT_SLOPPY_SCTP;
1091}
1092
1093static inline int sysctl_sync_ports(struct netns_ipvs *ipvs)
1094{
1095 return 1;
1096}
1097
1098static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs)
1099{
1100 return 0;
1101}
1102
1103static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
1104{
1105 return IPVS_SYNC_QLEN_MAX;
1106}
1107
1108static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs)
1109{
1110 return 0;
1111}
1112
1113static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs)
1114{
1115 return 1;
1116}
1117
1118static inline int sysctl_backup_only(struct netns_ipvs *ipvs)
1119{
1120 return 0;
1121}
1122
1123static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs)
1124{
1125 return 1;
1126}
1127
1128static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs)
1129{
1130 return 0;
1131}
1132
1133static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs)
1134{
1135 return 0;
1136}
1137
1138static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs)
1139{
1140 return 0;
1141}
1142
1143#endif
1144
1145
1146
1147
1148const char *ip_vs_proto_name(unsigned int proto);
1149void ip_vs_init_hash_table(struct list_head *table, int rows);
1150#define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t)))
1151
1152#define IP_VS_APP_TYPE_FTP 1
1153
1154
1155
1156
1157enum {
1158 IP_VS_DIR_INPUT = 0,
1159 IP_VS_DIR_OUTPUT,
1160 IP_VS_DIR_INPUT_ONLY,
1161 IP_VS_DIR_LAST,
1162};
1163
1164static inline void ip_vs_conn_fill_param(struct netns_ipvs *ipvs, int af, int protocol,
1165 const union nf_inet_addr *caddr,
1166 __be16 cport,
1167 const union nf_inet_addr *vaddr,
1168 __be16 vport,
1169 struct ip_vs_conn_param *p)
1170{
1171 p->ipvs = ipvs;
1172 p->af = af;
1173 p->protocol = protocol;
1174 p->caddr = caddr;
1175 p->cport = cport;
1176 p->vaddr = vaddr;
1177 p->vport = vport;
1178 p->pe = NULL;
1179 p->pe_data = NULL;
1180}
1181
1182struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p);
1183struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p);
1184
1185struct ip_vs_conn * ip_vs_conn_in_get_proto(struct netns_ipvs *ipvs, int af,
1186 const struct sk_buff *skb,
1187 const struct ip_vs_iphdr *iph);
1188
1189struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p);
1190
1191struct ip_vs_conn * ip_vs_conn_out_get_proto(struct netns_ipvs *ipvs, int af,
1192 const struct sk_buff *skb,
1193 const struct ip_vs_iphdr *iph);
1194
1195
1196
1197
1198
1199static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp)
1200{
1201 return atomic_inc_not_zero(&cp->refcnt);
1202}
1203
1204
1205static inline void __ip_vs_conn_put(struct ip_vs_conn *cp)
1206{
1207 smp_mb__before_atomic();
1208 atomic_dec(&cp->refcnt);
1209}
1210void ip_vs_conn_put(struct ip_vs_conn *cp);
1211void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport);
1212
1213struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af,
1214 const union nf_inet_addr *daddr,
1215 __be16 dport, unsigned int flags,
1216 struct ip_vs_dest *dest, __u32 fwmark);
1217void ip_vs_conn_expire_now(struct ip_vs_conn *cp);
1218
1219const char *ip_vs_state_name(__u16 proto, int state);
1220
1221void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp);
1222int ip_vs_check_template(struct ip_vs_conn *ct);
1223void ip_vs_random_dropentry(struct netns_ipvs *ipvs);
1224int ip_vs_conn_init(void);
1225void ip_vs_conn_cleanup(void);
1226
1227static inline void ip_vs_control_del(struct ip_vs_conn *cp)
1228{
1229 struct ip_vs_conn *ctl_cp = cp->control;
1230 if (!ctl_cp) {
1231 IP_VS_ERR_BUF("request control DEL for uncontrolled: "
1232 "%s:%d to %s:%d\n",
1233 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1234 ntohs(cp->cport),
1235 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1236 ntohs(cp->vport));
1237
1238 return;
1239 }
1240
1241 IP_VS_DBG_BUF(7, "DELeting control for: "
1242 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1243 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1244 ntohs(cp->cport),
1245 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
1246 ntohs(ctl_cp->cport));
1247
1248 cp->control = NULL;
1249 if (atomic_read(&ctl_cp->n_control) == 0) {
1250 IP_VS_ERR_BUF("BUG control DEL with n=0 : "
1251 "%s:%d to %s:%d\n",
1252 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1253 ntohs(cp->cport),
1254 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1255 ntohs(cp->vport));
1256
1257 return;
1258 }
1259 atomic_dec(&ctl_cp->n_control);
1260}
1261
1262static inline void
1263ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp)
1264{
1265 if (cp->control) {
1266 IP_VS_ERR_BUF("request control ADD for already controlled: "
1267 "%s:%d to %s:%d\n",
1268 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1269 ntohs(cp->cport),
1270 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1271 ntohs(cp->vport));
1272
1273 ip_vs_control_del(cp);
1274 }
1275
1276 IP_VS_DBG_BUF(7, "ADDing control for: "
1277 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1278 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1279 ntohs(cp->cport),
1280 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
1281 ntohs(ctl_cp->cport));
1282
1283 cp->control = ctl_cp;
1284 atomic_inc(&ctl_cp->n_control);
1285}
1286
1287
1288int ip_vs_estimator_net_init(struct netns_ipvs *ipvs);
1289int ip_vs_control_net_init(struct netns_ipvs *ipvs);
1290int ip_vs_protocol_net_init(struct netns_ipvs *ipvs);
1291int ip_vs_app_net_init(struct netns_ipvs *ipvs);
1292int ip_vs_conn_net_init(struct netns_ipvs *ipvs);
1293int ip_vs_sync_net_init(struct netns_ipvs *ipvs);
1294void ip_vs_conn_net_cleanup(struct netns_ipvs *ipvs);
1295void ip_vs_app_net_cleanup(struct netns_ipvs *ipvs);
1296void ip_vs_protocol_net_cleanup(struct netns_ipvs *ipvs);
1297void ip_vs_control_net_cleanup(struct netns_ipvs *ipvs);
1298void ip_vs_estimator_net_cleanup(struct netns_ipvs *ipvs);
1299void ip_vs_sync_net_cleanup(struct netns_ipvs *ipvs);
1300void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs);
1301
1302
1303
1304
1305#define IP_VS_APP_MAX_PORTS 8
1306struct ip_vs_app *register_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app);
1307void unregister_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app);
1308int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1309void ip_vs_unbind_app(struct ip_vs_conn *cp);
1310int register_ip_vs_app_inc(struct netns_ipvs *ipvs, struct ip_vs_app *app, __u16 proto,
1311 __u16 port);
1312int ip_vs_app_inc_get(struct ip_vs_app *inc);
1313void ip_vs_app_inc_put(struct ip_vs_app *inc);
1314
1315int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb);
1316int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb);
1317
1318int register_ip_vs_pe(struct ip_vs_pe *pe);
1319int unregister_ip_vs_pe(struct ip_vs_pe *pe);
1320struct ip_vs_pe *ip_vs_pe_getbyname(const char *name);
1321struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name);
1322
1323
1324#define ip_vs_pe_get(pe) \
1325 if (pe && pe->module) \
1326 __module_get(pe->module);
1327
1328#define ip_vs_pe_put(pe) \
1329 if (pe && pe->module) \
1330 module_put(pe->module);
1331
1332
1333int ip_vs_protocol_init(void);
1334void ip_vs_protocol_cleanup(void);
1335void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags);
1336int *ip_vs_create_timeout_table(int *table, int size);
1337int ip_vs_set_state_timeout(int *table, int num, const char *const *names,
1338 const char *name, int to);
1339void ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp,
1340 const struct sk_buff *skb, int offset,
1341 const char *msg);
1342
1343extern struct ip_vs_protocol ip_vs_protocol_tcp;
1344extern struct ip_vs_protocol ip_vs_protocol_udp;
1345extern struct ip_vs_protocol ip_vs_protocol_icmp;
1346extern struct ip_vs_protocol ip_vs_protocol_esp;
1347extern struct ip_vs_protocol ip_vs_protocol_ah;
1348extern struct ip_vs_protocol ip_vs_protocol_sctp;
1349
1350
1351
1352
1353int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
1354int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
1355int ip_vs_bind_scheduler(struct ip_vs_service *svc,
1356 struct ip_vs_scheduler *scheduler);
1357void ip_vs_unbind_scheduler(struct ip_vs_service *svc,
1358 struct ip_vs_scheduler *sched);
1359struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name);
1360void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler);
1361struct ip_vs_conn *
1362ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
1363 struct ip_vs_proto_data *pd, int *ignored,
1364 struct ip_vs_iphdr *iph);
1365int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
1366 struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph);
1367
1368void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg);
1369
1370
1371extern struct ip_vs_stats ip_vs_stats;
1372extern int sysctl_ip_vs_sync_ver;
1373
1374struct ip_vs_service *
1375ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol,
1376 const union nf_inet_addr *vaddr, __be16 vport);
1377
1378bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
1379 const union nf_inet_addr *daddr, __be16 dport);
1380
1381int ip_vs_use_count_inc(void);
1382void ip_vs_use_count_dec(void);
1383int ip_vs_register_nl_ioctl(void);
1384void ip_vs_unregister_nl_ioctl(void);
1385int ip_vs_control_init(void);
1386void ip_vs_control_cleanup(void);
1387struct ip_vs_dest *
1388ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af,
1389 const union nf_inet_addr *daddr, __be16 dport,
1390 const union nf_inet_addr *vaddr, __be16 vport,
1391 __u16 protocol, __u32 fwmark, __u32 flags);
1392void ip_vs_try_bind_dest(struct ip_vs_conn *cp);
1393
1394static inline void ip_vs_dest_hold(struct ip_vs_dest *dest)
1395{
1396 atomic_inc(&dest->refcnt);
1397}
1398
1399static inline void ip_vs_dest_put(struct ip_vs_dest *dest)
1400{
1401 smp_mb__before_atomic();
1402 atomic_dec(&dest->refcnt);
1403}
1404
1405static inline void ip_vs_dest_put_and_free(struct ip_vs_dest *dest)
1406{
1407 if (atomic_dec_return(&dest->refcnt) < 0)
1408 kfree(dest);
1409}
1410
1411
1412
1413
1414int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *cfg,
1415 int state);
1416int stop_sync_thread(struct netns_ipvs *ipvs, int state);
1417void ip_vs_sync_conn(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, int pkts);
1418
1419
1420void ip_vs_start_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats);
1421void ip_vs_stop_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats);
1422void ip_vs_zero_estimator(struct ip_vs_stats *stats);
1423void ip_vs_read_estimator(struct ip_vs_kstats *dst, struct ip_vs_stats *stats);
1424
1425
1426int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1427 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1428int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1429 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1430int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1431 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1432int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1433 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1434int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1435 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1436int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1437 struct ip_vs_protocol *pp, int offset,
1438 unsigned int hooknum, struct ip_vs_iphdr *iph);
1439void ip_vs_dest_dst_rcu_free(struct rcu_head *head);
1440
1441#ifdef CONFIG_IP_VS_IPV6
1442int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1443 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1444int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1445 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1446int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1447 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1448int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1449 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1450int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1451 struct ip_vs_protocol *pp, int offset,
1452 unsigned int hooknum, struct ip_vs_iphdr *iph);
1453#endif
1454
1455#ifdef CONFIG_SYSCTL
1456
1457
1458
1459
1460static inline int ip_vs_todrop(struct netns_ipvs *ipvs)
1461{
1462 if (!ipvs->drop_rate)
1463 return 0;
1464 if (--ipvs->drop_counter > 0)
1465 return 0;
1466 ipvs->drop_counter = ipvs->drop_rate;
1467 return 1;
1468}
1469#else
1470static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; }
1471#endif
1472
1473
1474#define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK)
1475
1476static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp)
1477{
1478 char fwd;
1479
1480 switch (IP_VS_FWD_METHOD(cp)) {
1481 case IP_VS_CONN_F_MASQ:
1482 fwd = 'M'; break;
1483 case IP_VS_CONN_F_LOCALNODE:
1484 fwd = 'L'; break;
1485 case IP_VS_CONN_F_TUNNEL:
1486 fwd = 'T'; break;
1487 case IP_VS_CONN_F_DROUTE:
1488 fwd = 'R'; break;
1489 case IP_VS_CONN_F_BYPASS:
1490 fwd = 'B'; break;
1491 default:
1492 fwd = '?'; break;
1493 }
1494 return fwd;
1495}
1496
1497void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
1498 struct ip_vs_conn *cp, int dir);
1499
1500#ifdef CONFIG_IP_VS_IPV6
1501void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp,
1502 struct ip_vs_conn *cp, int dir);
1503#endif
1504
1505__sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset);
1506
1507static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum)
1508{
1509 __be32 diff[2] = { ~old, new };
1510
1511 return csum_partial(diff, sizeof(diff), oldsum);
1512}
1513
1514#ifdef CONFIG_IP_VS_IPV6
1515static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new,
1516 __wsum oldsum)
1517{
1518 __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0],
1519 new[3], new[2], new[1], new[0] };
1520
1521 return csum_partial(diff, sizeof(diff), oldsum);
1522}
1523#endif
1524
1525static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum)
1526{
1527 __be16 diff[2] = { ~old, new };
1528
1529 return csum_partial(diff, sizeof(diff), oldsum);
1530}
1531
1532
1533static inline void ip_vs_notrack(struct sk_buff *skb)
1534{
1535#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1536 enum ip_conntrack_info ctinfo;
1537 struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
1538
1539 if (!ct || !nf_ct_is_untracked(ct)) {
1540 nf_conntrack_put(skb->nfct);
1541 skb->nfct = &nf_ct_untracked_get()->ct_general;
1542 skb->nfctinfo = IP_CT_NEW;
1543 nf_conntrack_get(skb->nfct);
1544 }
1545#endif
1546}
1547
1548#ifdef CONFIG_IP_VS_NFCT
1549
1550
1551
1552static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs)
1553{
1554#ifdef CONFIG_SYSCTL
1555 return ipvs->sysctl_conntrack;
1556#else
1557 return 0;
1558#endif
1559}
1560
1561void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp,
1562 int outin);
1563int ip_vs_confirm_conntrack(struct sk_buff *skb);
1564void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct,
1565 struct ip_vs_conn *cp, u_int8_t proto,
1566 const __be16 port, int from_rs);
1567void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp);
1568
1569#else
1570
1571static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs)
1572{
1573 return 0;
1574}
1575
1576static inline void ip_vs_update_conntrack(struct sk_buff *skb,
1577 struct ip_vs_conn *cp, int outin)
1578{
1579}
1580
1581static inline int ip_vs_confirm_conntrack(struct sk_buff *skb)
1582{
1583 return NF_ACCEPT;
1584}
1585
1586static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp)
1587{
1588}
1589#endif
1590
1591
1592static inline bool ip_vs_conn_uses_conntrack(struct ip_vs_conn *cp,
1593 struct sk_buff *skb)
1594{
1595#ifdef CONFIG_IP_VS_NFCT
1596 enum ip_conntrack_info ctinfo;
1597 struct nf_conn *ct;
1598
1599 if (!(cp->flags & IP_VS_CONN_F_NFCT))
1600 return false;
1601 ct = nf_ct_get(skb, &ctinfo);
1602 if (ct && !nf_ct_is_untracked(ct))
1603 return true;
1604#endif
1605 return false;
1606}
1607
1608static inline int
1609ip_vs_dest_conn_overhead(struct ip_vs_dest *dest)
1610{
1611
1612
1613
1614
1615
1616
1617 return (atomic_read(&dest->activeconns) << 8) +
1618 atomic_read(&dest->inactconns);
1619}
1620
1621#endif
1622