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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/refcount.h>
17#include <linux/workqueue.h>
18
19#include <linux/compiler.h>
20#include <linux/timer.h>
21#include <linux/bug.h>
22
23#include <net/checksum.h>
24#include <linux/netfilter.h>
25#include <linux/ip.h>
26#include <linux/ipv6.h>
27#include <net/ipv6.h>
28#if IS_ENABLED(CONFIG_NF_CONNTRACK)
29#include <net/netfilter/nf_conntrack.h>
30#endif
31#include <net/net_namespace.h>
32
33#define IP_VS_HDR_INVERSE 1
34#define IP_VS_HDR_ICMP 2
35
36
37static inline struct netns_ipvs *net_ipvs(struct net* net)
38{
39 return net->ipvs;
40}
41
42
43extern int ip_vs_conn_tab_size;
44
45struct ip_vs_iphdr {
46 int hdr_flags;
47 __u32 off;
48 __u32 len;
49
50 __u16 fragoffs;
51 __s16 protocol;
52 __s32 flags;
53 union nf_inet_addr saddr;
54 union nf_inet_addr daddr;
55};
56
57static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset,
58 int len, void *buffer)
59{
60 return skb_header_pointer(skb, offset, len, buffer);
61}
62
63
64
65
66
67static inline int
68ip_vs_fill_iph_skb_off(int af, const struct sk_buff *skb, int offset,
69 int hdr_flags, struct ip_vs_iphdr *iphdr)
70{
71 iphdr->hdr_flags = hdr_flags;
72 iphdr->off = offset;
73
74#ifdef CONFIG_IP_VS_IPV6
75 if (af == AF_INET6) {
76 struct ipv6hdr _iph;
77 const struct ipv6hdr *iph = skb_header_pointer(
78 skb, offset, sizeof(_iph), &_iph);
79 if (!iph)
80 return 0;
81
82 iphdr->saddr.in6 = iph->saddr;
83 iphdr->daddr.in6 = iph->daddr;
84
85 iphdr->len = offset;
86 iphdr->flags = 0;
87 iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1,
88 &iphdr->fragoffs,
89 &iphdr->flags);
90 if (iphdr->protocol < 0)
91 return 0;
92 } else
93#endif
94 {
95 struct iphdr _iph;
96 const struct iphdr *iph = skb_header_pointer(
97 skb, offset, sizeof(_iph), &_iph);
98 if (!iph)
99 return 0;
100
101 iphdr->len = offset + iph->ihl * 4;
102 iphdr->fragoffs = 0;
103 iphdr->protocol = iph->protocol;
104 iphdr->saddr.ip = iph->saddr;
105 iphdr->daddr.ip = iph->daddr;
106 }
107
108 return 1;
109}
110
111static inline int
112ip_vs_fill_iph_skb_icmp(int af, const struct sk_buff *skb, int offset,
113 bool inverse, struct ip_vs_iphdr *iphdr)
114{
115 int hdr_flags = IP_VS_HDR_ICMP;
116
117 if (inverse)
118 hdr_flags |= IP_VS_HDR_INVERSE;
119
120 return ip_vs_fill_iph_skb_off(af, skb, offset, hdr_flags, iphdr);
121}
122
123static inline int
124ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, bool inverse,
125 struct ip_vs_iphdr *iphdr)
126{
127 int hdr_flags = 0;
128
129 if (inverse)
130 hdr_flags |= IP_VS_HDR_INVERSE;
131
132 return ip_vs_fill_iph_skb_off(af, skb, skb_network_offset(skb),
133 hdr_flags, iphdr);
134}
135
136static inline bool
137ip_vs_iph_inverse(const struct ip_vs_iphdr *iph)
138{
139 return !!(iph->hdr_flags & IP_VS_HDR_INVERSE);
140}
141
142static inline bool
143ip_vs_iph_icmp(const struct ip_vs_iphdr *iph)
144{
145 return !!(iph->hdr_flags & IP_VS_HDR_ICMP);
146}
147
148static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst,
149 const union nf_inet_addr *src)
150{
151#ifdef CONFIG_IP_VS_IPV6
152 if (af == AF_INET6)
153 dst->in6 = src->in6;
154 else
155#endif
156 dst->ip = src->ip;
157}
158
159static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst,
160 const union nf_inet_addr *src)
161{
162#ifdef CONFIG_IP_VS_IPV6
163 if (af == AF_INET6) {
164 dst->in6 = src->in6;
165 return;
166 }
167#endif
168 dst->ip = src->ip;
169 dst->all[1] = 0;
170 dst->all[2] = 0;
171 dst->all[3] = 0;
172}
173
174static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a,
175 const union nf_inet_addr *b)
176{
177#ifdef CONFIG_IP_VS_IPV6
178 if (af == AF_INET6)
179 return ipv6_addr_equal(&a->in6, &b->in6);
180#endif
181 return a->ip == b->ip;
182}
183
184#ifdef CONFIG_IP_VS_DEBUG
185#include <linux/net.h>
186
187int ip_vs_get_debug_level(void);
188
189static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len,
190 const union nf_inet_addr *addr,
191 int *idx)
192{
193 int len;
194#ifdef CONFIG_IP_VS_IPV6
195 if (af == AF_INET6)
196 len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]",
197 &addr->in6) + 1;
198 else
199#endif
200 len = snprintf(&buf[*idx], buf_len - *idx, "%pI4",
201 &addr->ip) + 1;
202
203 *idx += len;
204 BUG_ON(*idx > buf_len + 1);
205 return &buf[*idx - len];
206}
207
208#define IP_VS_DBG_BUF(level, msg, ...) \
209 do { \
210 char ip_vs_dbg_buf[160]; \
211 int ip_vs_dbg_idx = 0; \
212 if (level <= ip_vs_get_debug_level()) \
213 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
214 } while (0)
215#define IP_VS_ERR_BUF(msg...) \
216 do { \
217 char ip_vs_dbg_buf[160]; \
218 int ip_vs_dbg_idx = 0; \
219 pr_err(msg); \
220 } while (0)
221
222
223#define IP_VS_DBG_ADDR(af, addr) \
224 ip_vs_dbg_addr(af, ip_vs_dbg_buf, \
225 sizeof(ip_vs_dbg_buf), addr, \
226 &ip_vs_dbg_idx)
227
228#define IP_VS_DBG(level, msg, ...) \
229 do { \
230 if (level <= ip_vs_get_debug_level()) \
231 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
232 } while (0)
233#define IP_VS_DBG_RL(msg, ...) \
234 do { \
235 if (net_ratelimit()) \
236 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
237 } while (0)
238#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \
239 do { \
240 if (level <= ip_vs_get_debug_level()) \
241 pp->debug_packet(af, pp, skb, ofs, msg); \
242 } while (0)
243#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \
244 do { \
245 if (level <= ip_vs_get_debug_level() && \
246 net_ratelimit()) \
247 pp->debug_packet(af, pp, skb, ofs, msg); \
248 } while (0)
249#else
250#define IP_VS_DBG_BUF(level, msg...) do {} while (0)
251#define IP_VS_ERR_BUF(msg...) do {} while (0)
252#define IP_VS_DBG(level, msg...) do {} while (0)
253#define IP_VS_DBG_RL(msg...) do {} while (0)
254#define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
255#define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0)
256#endif
257
258#define IP_VS_BUG() BUG()
259#define IP_VS_ERR_RL(msg, ...) \
260 do { \
261 if (net_ratelimit()) \
262 pr_err(msg, ##__VA_ARGS__); \
263 } while (0)
264
265#ifdef CONFIG_IP_VS_DEBUG
266#define EnterFunction(level) \
267 do { \
268 if (level <= ip_vs_get_debug_level()) \
269 printk(KERN_DEBUG \
270 pr_fmt("Enter: %s, %s line %i\n"), \
271 __func__, __FILE__, __LINE__); \
272 } while (0)
273#define LeaveFunction(level) \
274 do { \
275 if (level <= ip_vs_get_debug_level()) \
276 printk(KERN_DEBUG \
277 pr_fmt("Leave: %s, %s line %i\n"), \
278 __func__, __FILE__, __LINE__); \
279 } while (0)
280#else
281#define EnterFunction(level) do {} while (0)
282#define LeaveFunction(level) do {} while (0)
283#endif
284
285
286#define FTPPORT cpu_to_be16(21)
287#define FTPDATA cpu_to_be16(20)
288
289
290enum {
291 IP_VS_TCP_S_NONE = 0,
292 IP_VS_TCP_S_ESTABLISHED,
293 IP_VS_TCP_S_SYN_SENT,
294 IP_VS_TCP_S_SYN_RECV,
295 IP_VS_TCP_S_FIN_WAIT,
296 IP_VS_TCP_S_TIME_WAIT,
297 IP_VS_TCP_S_CLOSE,
298 IP_VS_TCP_S_CLOSE_WAIT,
299 IP_VS_TCP_S_LAST_ACK,
300 IP_VS_TCP_S_LISTEN,
301 IP_VS_TCP_S_SYNACK,
302 IP_VS_TCP_S_LAST
303};
304
305
306enum {
307 IP_VS_UDP_S_NORMAL,
308 IP_VS_UDP_S_LAST,
309};
310
311
312enum {
313 IP_VS_ICMP_S_NORMAL,
314 IP_VS_ICMP_S_LAST,
315};
316
317
318enum ip_vs_sctp_states {
319 IP_VS_SCTP_S_NONE,
320 IP_VS_SCTP_S_INIT1,
321 IP_VS_SCTP_S_INIT,
322 IP_VS_SCTP_S_COOKIE_SENT,
323 IP_VS_SCTP_S_COOKIE_REPLIED,
324 IP_VS_SCTP_S_COOKIE_WAIT,
325 IP_VS_SCTP_S_COOKIE,
326 IP_VS_SCTP_S_COOKIE_ECHOED,
327 IP_VS_SCTP_S_ESTABLISHED,
328 IP_VS_SCTP_S_SHUTDOWN_SENT,
329 IP_VS_SCTP_S_SHUTDOWN_RECEIVED,
330 IP_VS_SCTP_S_SHUTDOWN_ACK_SENT,
331 IP_VS_SCTP_S_REJECTED,
332 IP_VS_SCTP_S_CLOSED,
333 IP_VS_SCTP_S_LAST
334};
335
336
337#define IP_VS_CTPL_S_NONE 0x0000
338#define IP_VS_CTPL_S_ASSURED 0x0001
339#define IP_VS_CTPL_S_LAST 0x0002
340
341
342
343
344
345struct ip_vs_seq {
346 __u32 init_seq;
347 __u32 delta;
348 __u32 previous_delta;
349
350};
351
352
353struct ip_vs_counters {
354 __u64 conns;
355 __u64 inpkts;
356 __u64 outpkts;
357 __u64 inbytes;
358 __u64 outbytes;
359};
360
361struct ip_vs_cpu_stats {
362 struct ip_vs_counters cnt;
363 struct u64_stats_sync syncp;
364};
365
366
367struct ip_vs_estimator {
368 struct list_head list;
369
370 u64 last_inbytes;
371 u64 last_outbytes;
372 u64 last_conns;
373 u64 last_inpkts;
374 u64 last_outpkts;
375
376 u64 cps;
377 u64 inpps;
378 u64 outpps;
379 u64 inbps;
380 u64 outbps;
381};
382
383
384
385
386struct ip_vs_kstats {
387 u64 conns;
388 u64 inpkts;
389 u64 outpkts;
390 u64 inbytes;
391 u64 outbytes;
392
393 u64 cps;
394 u64 inpps;
395 u64 outpps;
396 u64 inbps;
397 u64 outbps;
398};
399
400struct ip_vs_stats {
401 struct ip_vs_kstats kstats;
402 struct ip_vs_estimator est;
403 struct ip_vs_cpu_stats __percpu *cpustats;
404 spinlock_t lock;
405 struct ip_vs_kstats kstats0;
406};
407
408struct dst_entry;
409struct iphdr;
410struct ip_vs_conn;
411struct ip_vs_app;
412struct sk_buff;
413struct ip_vs_proto_data;
414
415struct ip_vs_protocol {
416 struct ip_vs_protocol *next;
417 char *name;
418 u16 protocol;
419 u16 num_states;
420 int dont_defrag;
421
422 void (*init)(struct ip_vs_protocol *pp);
423
424 void (*exit)(struct ip_vs_protocol *pp);
425
426 int (*init_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd);
427
428 void (*exit_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd);
429
430 int (*conn_schedule)(struct netns_ipvs *ipvs,
431 int af, struct sk_buff *skb,
432 struct ip_vs_proto_data *pd,
433 int *verdict, struct ip_vs_conn **cpp,
434 struct ip_vs_iphdr *iph);
435
436 struct ip_vs_conn *
437 (*conn_in_get)(struct netns_ipvs *ipvs,
438 int af,
439 const struct sk_buff *skb,
440 const struct ip_vs_iphdr *iph);
441
442 struct ip_vs_conn *
443 (*conn_out_get)(struct netns_ipvs *ipvs,
444 int af,
445 const struct sk_buff *skb,
446 const struct ip_vs_iphdr *iph);
447
448 int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp,
449 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph);
450
451 int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp,
452 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph);
453
454 const char *(*state_name)(int state);
455
456 void (*state_transition)(struct ip_vs_conn *cp, int direction,
457 const struct sk_buff *skb,
458 struct ip_vs_proto_data *pd);
459
460 int (*register_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc);
461
462 void (*unregister_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc);
463
464 int (*app_conn_bind)(struct ip_vs_conn *cp);
465
466 void (*debug_packet)(int af, struct ip_vs_protocol *pp,
467 const struct sk_buff *skb,
468 int offset,
469 const char *msg);
470
471 void (*timeout_change)(struct ip_vs_proto_data *pd, int flags);
472};
473
474
475struct ip_vs_proto_data {
476 struct ip_vs_proto_data *next;
477 struct ip_vs_protocol *pp;
478 int *timeout_table;
479 atomic_t appcnt;
480 struct tcp_states_t *tcp_state_table;
481};
482
483struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto);
484struct ip_vs_proto_data *ip_vs_proto_data_get(struct netns_ipvs *ipvs,
485 unsigned short proto);
486
487struct ip_vs_conn_param {
488 struct netns_ipvs *ipvs;
489 const union nf_inet_addr *caddr;
490 const union nf_inet_addr *vaddr;
491 __be16 cport;
492 __be16 vport;
493 __u16 protocol;
494 u16 af;
495
496 const struct ip_vs_pe *pe;
497 char *pe_data;
498 __u8 pe_data_len;
499};
500
501
502struct ip_vs_conn {
503 struct hlist_node c_list;
504
505 __be16 cport;
506 __be16 dport;
507 __be16 vport;
508 u16 af;
509 union nf_inet_addr caddr;
510 union nf_inet_addr vaddr;
511 union nf_inet_addr daddr;
512 volatile __u32 flags;
513 __u16 protocol;
514 __u16 daf;
515 struct netns_ipvs *ipvs;
516
517
518 refcount_t refcnt;
519 struct timer_list timer;
520 volatile unsigned long timeout;
521
522
523 spinlock_t lock;
524 volatile __u16 state;
525 volatile __u16 old_state;
526
527
528
529 __u32 fwmark;
530 unsigned long sync_endtime;
531
532
533 struct ip_vs_conn *control;
534 atomic_t n_control;
535 struct ip_vs_dest *dest;
536 atomic_t in_pkts;
537
538
539
540
541
542
543 int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp,
544 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
545
546
547
548
549
550 struct ip_vs_app *app;
551 void *app_data;
552 struct ip_vs_seq in_seq;
553 struct ip_vs_seq out_seq;
554
555 const struct ip_vs_pe *pe;
556 char *pe_data;
557 __u8 pe_data_len;
558
559 struct rcu_head rcu_head;
560};
561
562
563
564
565
566
567
568
569struct ip_vs_service_user_kern {
570
571 u16 af;
572 u16 protocol;
573 union nf_inet_addr addr;
574 __be16 port;
575 u32 fwmark;
576
577
578 char *sched_name;
579 char *pe_name;
580 unsigned int flags;
581 unsigned int timeout;
582 __be32 netmask;
583};
584
585
586struct ip_vs_dest_user_kern {
587
588 union nf_inet_addr addr;
589 __be16 port;
590
591
592 unsigned int conn_flags;
593 int weight;
594
595
596 u32 u_threshold;
597 u32 l_threshold;
598
599
600 u16 af;
601
602 u16 tun_type;
603 __be16 tun_port;
604 u16 tun_flags;
605};
606
607
608
609
610
611
612struct ip_vs_service {
613 struct hlist_node s_list;
614 struct hlist_node f_list;
615 atomic_t refcnt;
616
617 u16 af;
618 __u16 protocol;
619 union nf_inet_addr addr;
620 __be16 port;
621 __u32 fwmark;
622 unsigned int flags;
623 unsigned int timeout;
624 __be32 netmask;
625 struct netns_ipvs *ipvs;
626
627 struct list_head destinations;
628 __u32 num_dests;
629 struct ip_vs_stats stats;
630
631
632 struct ip_vs_scheduler __rcu *scheduler;
633 spinlock_t sched_lock;
634 void *sched_data;
635
636
637 struct ip_vs_pe __rcu *pe;
638 int conntrack_afmask;
639
640 struct rcu_head rcu_head;
641};
642
643
644struct ip_vs_dest_dst {
645 struct dst_entry *dst_cache;
646 u32 dst_cookie;
647 union nf_inet_addr dst_saddr;
648 struct rcu_head rcu_head;
649};
650
651
652
653
654struct ip_vs_dest {
655 struct list_head n_list;
656 struct hlist_node d_list;
657
658 u16 af;
659 __be16 port;
660 union nf_inet_addr addr;
661 volatile unsigned int flags;
662 atomic_t conn_flags;
663 atomic_t weight;
664 atomic_t last_weight;
665 __u16 tun_type;
666 __be16 tun_port;
667 __u16 tun_flags;
668
669 refcount_t refcnt;
670 struct ip_vs_stats stats;
671 unsigned long idle_start;
672
673
674 atomic_t activeconns;
675 atomic_t inactconns;
676 atomic_t persistconns;
677 __u32 u_threshold;
678 __u32 l_threshold;
679
680
681 spinlock_t dst_lock;
682 struct ip_vs_dest_dst __rcu *dest_dst;
683
684
685 struct ip_vs_service __rcu *svc;
686 __u16 protocol;
687 __be16 vport;
688 union nf_inet_addr vaddr;
689 __u32 vfwmark;
690
691 struct list_head t_list;
692 unsigned int in_rs_table:1;
693};
694
695
696struct ip_vs_scheduler {
697 struct list_head n_list;
698 char *name;
699 atomic_t refcnt;
700 struct module *module;
701
702
703 int (*init_service)(struct ip_vs_service *svc);
704
705 void (*done_service)(struct ip_vs_service *svc);
706
707 int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest);
708
709 int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest);
710
711 int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest);
712
713
714 struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc,
715 const struct sk_buff *skb,
716 struct ip_vs_iphdr *iph);
717};
718
719
720struct ip_vs_pe {
721 struct list_head n_list;
722 char *name;
723 atomic_t refcnt;
724 struct module *module;
725
726
727 int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb);
728 bool (*ct_match)(const struct ip_vs_conn_param *p,
729 struct ip_vs_conn *ct);
730 u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval,
731 bool inverse);
732 int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf);
733
734 struct ip_vs_conn* (*conn_out)(struct ip_vs_service *svc,
735 struct ip_vs_dest *dest,
736 struct sk_buff *skb,
737 const struct ip_vs_iphdr *iph,
738 __be16 dport, __be16 cport);
739};
740
741
742struct ip_vs_app {
743 struct list_head a_list;
744 int type;
745 char *name;
746 __u16 protocol;
747 struct module *module;
748 struct list_head incs_list;
749
750
751 struct list_head p_list;
752 struct ip_vs_app *app;
753 __be16 port;
754 atomic_t usecnt;
755 struct rcu_head rcu_head;
756
757
758
759
760
761 int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *,
762 struct sk_buff *, int *diff, struct ip_vs_iphdr *ipvsh);
763
764
765
766
767
768 int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *,
769 struct sk_buff *, int *diff, struct ip_vs_iphdr *ipvsh);
770
771
772 int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *);
773
774
775 int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *);
776
777
778
779 int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *,
780 struct ip_vs_protocol *);
781
782 void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *);
783
784 int * timeout_table;
785 int * timeouts;
786 int timeouts_size;
787
788 int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app,
789 int *verdict, struct ip_vs_conn **cpp);
790
791 struct ip_vs_conn *
792 (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app,
793 const struct iphdr *iph, int inverse);
794
795 struct ip_vs_conn *
796 (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app,
797 const struct iphdr *iph, int inverse);
798
799 int (*state_transition)(struct ip_vs_conn *cp, int direction,
800 const struct sk_buff *skb,
801 struct ip_vs_app *app);
802
803 void (*timeout_change)(struct ip_vs_app *app, int flags);
804};
805
806struct ipvs_master_sync_state {
807 struct list_head sync_queue;
808 struct ip_vs_sync_buff *sync_buff;
809 unsigned long sync_queue_len;
810 unsigned int sync_queue_delay;
811 struct delayed_work master_wakeup_work;
812 struct netns_ipvs *ipvs;
813};
814
815struct ip_vs_sync_thread_data;
816
817
818#define IP_VS_DEST_TRASH_PERIOD (120 * HZ)
819
820struct ipvs_sync_daemon_cfg {
821 union nf_inet_addr mcast_group;
822 int syncid;
823 u16 sync_maxlen;
824 u16 mcast_port;
825 u8 mcast_af;
826 u8 mcast_ttl;
827
828 char mcast_ifn[IP_VS_IFNAME_MAXLEN];
829};
830
831
832struct netns_ipvs {
833 int gen;
834 int enable;
835
836 #define IP_VS_RTAB_BITS 4
837 #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS)
838 #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1)
839
840 struct hlist_head rs_table[IP_VS_RTAB_SIZE];
841
842 struct list_head app_list;
843
844 #define IP_VS_PROTO_TAB_SIZE 32
845 struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE];
846
847#ifdef CONFIG_IP_VS_PROTO_TCP
848 #define TCP_APP_TAB_BITS 4
849 #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS)
850 #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1)
851 struct list_head tcp_apps[TCP_APP_TAB_SIZE];
852#endif
853
854#ifdef CONFIG_IP_VS_PROTO_UDP
855 #define UDP_APP_TAB_BITS 4
856 #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS)
857 #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1)
858 struct list_head udp_apps[UDP_APP_TAB_SIZE];
859#endif
860
861#ifdef CONFIG_IP_VS_PROTO_SCTP
862 #define SCTP_APP_TAB_BITS 4
863 #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS)
864 #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1)
865
866 struct list_head sctp_apps[SCTP_APP_TAB_SIZE];
867#endif
868
869 atomic_t conn_count;
870
871
872 struct ip_vs_stats tot_stats;
873
874 int num_services;
875 int num_services6;
876
877
878 struct list_head dest_trash;
879 spinlock_t dest_trash_lock;
880 struct timer_list dest_trash_timer;
881
882 atomic_t ftpsvc_counter;
883 atomic_t nullsvc_counter;
884 atomic_t conn_out_counter;
885
886#ifdef CONFIG_SYSCTL
887
888 struct delayed_work expire_nodest_conn_work;
889
890 struct delayed_work defense_work;
891 int drop_rate;
892 int drop_counter;
893 int old_secure_tcp;
894 atomic_t dropentry;
895
896 spinlock_t dropentry_lock;
897 spinlock_t droppacket_lock;
898 spinlock_t securetcp_lock;
899
900
901 struct ctl_table_header *sysctl_hdr;
902 struct ctl_table *sysctl_tbl;
903#endif
904
905
906 int sysctl_amemthresh;
907 int sysctl_am_droprate;
908 int sysctl_drop_entry;
909 int sysctl_drop_packet;
910 int sysctl_secure_tcp;
911#ifdef CONFIG_IP_VS_NFCT
912 int sysctl_conntrack;
913#endif
914 int sysctl_snat_reroute;
915 int sysctl_sync_ver;
916 int sysctl_sync_ports;
917 int sysctl_sync_persist_mode;
918 unsigned long sysctl_sync_qlen_max;
919 int sysctl_sync_sock_size;
920 int sysctl_cache_bypass;
921 int sysctl_expire_nodest_conn;
922 int sysctl_sloppy_tcp;
923 int sysctl_sloppy_sctp;
924 int sysctl_expire_quiescent_template;
925 int sysctl_sync_threshold[2];
926 unsigned int sysctl_sync_refresh_period;
927 int sysctl_sync_retries;
928 int sysctl_nat_icmp_send;
929 int sysctl_pmtu_disc;
930 int sysctl_backup_only;
931 int sysctl_conn_reuse_mode;
932 int sysctl_schedule_icmp;
933 int sysctl_ignore_tunneled;
934
935
936 int sysctl_lblc_expiration;
937 struct ctl_table_header *lblc_ctl_header;
938 struct ctl_table *lblc_ctl_table;
939
940 int sysctl_lblcr_expiration;
941 struct ctl_table_header *lblcr_ctl_header;
942 struct ctl_table *lblcr_ctl_table;
943
944 struct list_head est_list;
945 spinlock_t est_lock;
946 struct timer_list est_timer;
947
948 spinlock_t sync_lock;
949 struct ipvs_master_sync_state *ms;
950 spinlock_t sync_buff_lock;
951 struct ip_vs_sync_thread_data *master_tinfo;
952 struct ip_vs_sync_thread_data *backup_tinfo;
953 int threads_mask;
954 volatile int sync_state;
955 struct mutex sync_mutex;
956 struct ipvs_sync_daemon_cfg mcfg;
957 struct ipvs_sync_daemon_cfg bcfg;
958
959 struct net *net;
960
961
962
963 unsigned int mixed_address_family_dests;
964 unsigned int hooks_afmask;
965};
966
967#define DEFAULT_SYNC_THRESHOLD 3
968#define DEFAULT_SYNC_PERIOD 50
969#define DEFAULT_SYNC_VER 1
970#define DEFAULT_SLOPPY_TCP 0
971#define DEFAULT_SLOPPY_SCTP 0
972#define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ)
973#define DEFAULT_SYNC_RETRIES 0
974#define IPVS_SYNC_WAKEUP_RATE 8
975#define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4)
976#define IPVS_SYNC_SEND_DELAY (HZ / 50)
977#define IPVS_SYNC_CHECK_PERIOD HZ
978#define IPVS_SYNC_FLUSH_TIME (HZ * 2)
979#define IPVS_SYNC_PORTS_MAX (1 << 6)
980
981#ifdef CONFIG_SYSCTL
982
983static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs)
984{
985 return ipvs->sysctl_sync_threshold[0];
986}
987
988static inline int sysctl_sync_period(struct netns_ipvs *ipvs)
989{
990 return READ_ONCE(ipvs->sysctl_sync_threshold[1]);
991}
992
993static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs)
994{
995 return READ_ONCE(ipvs->sysctl_sync_refresh_period);
996}
997
998static inline int sysctl_sync_retries(struct netns_ipvs *ipvs)
999{
1000 return ipvs->sysctl_sync_retries;
1001}
1002
1003static inline int sysctl_sync_ver(struct netns_ipvs *ipvs)
1004{
1005 return ipvs->sysctl_sync_ver;
1006}
1007
1008static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs)
1009{
1010 return ipvs->sysctl_sloppy_tcp;
1011}
1012
1013static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs)
1014{
1015 return ipvs->sysctl_sloppy_sctp;
1016}
1017
1018static inline int sysctl_sync_ports(struct netns_ipvs *ipvs)
1019{
1020 return READ_ONCE(ipvs->sysctl_sync_ports);
1021}
1022
1023static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs)
1024{
1025 return ipvs->sysctl_sync_persist_mode;
1026}
1027
1028static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
1029{
1030 return ipvs->sysctl_sync_qlen_max;
1031}
1032
1033static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs)
1034{
1035 return ipvs->sysctl_sync_sock_size;
1036}
1037
1038static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs)
1039{
1040 return ipvs->sysctl_pmtu_disc;
1041}
1042
1043static inline int sysctl_backup_only(struct netns_ipvs *ipvs)
1044{
1045 return ipvs->sync_state & IP_VS_STATE_BACKUP &&
1046 ipvs->sysctl_backup_only;
1047}
1048
1049static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs)
1050{
1051 return ipvs->sysctl_conn_reuse_mode;
1052}
1053
1054static inline int sysctl_expire_nodest_conn(struct netns_ipvs *ipvs)
1055{
1056 return ipvs->sysctl_expire_nodest_conn;
1057}
1058
1059static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs)
1060{
1061 return ipvs->sysctl_schedule_icmp;
1062}
1063
1064static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs)
1065{
1066 return ipvs->sysctl_ignore_tunneled;
1067}
1068
1069static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs)
1070{
1071 return ipvs->sysctl_cache_bypass;
1072}
1073
1074#else
1075
1076static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs)
1077{
1078 return DEFAULT_SYNC_THRESHOLD;
1079}
1080
1081static inline int sysctl_sync_period(struct netns_ipvs *ipvs)
1082{
1083 return DEFAULT_SYNC_PERIOD;
1084}
1085
1086static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs)
1087{
1088 return DEFAULT_SYNC_REFRESH_PERIOD;
1089}
1090
1091static inline int sysctl_sync_retries(struct netns_ipvs *ipvs)
1092{
1093 return DEFAULT_SYNC_RETRIES & 3;
1094}
1095
1096static inline int sysctl_sync_ver(struct netns_ipvs *ipvs)
1097{
1098 return DEFAULT_SYNC_VER;
1099}
1100
1101static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs)
1102{
1103 return DEFAULT_SLOPPY_TCP;
1104}
1105
1106static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs)
1107{
1108 return DEFAULT_SLOPPY_SCTP;
1109}
1110
1111static inline int sysctl_sync_ports(struct netns_ipvs *ipvs)
1112{
1113 return 1;
1114}
1115
1116static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs)
1117{
1118 return 0;
1119}
1120
1121static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs)
1122{
1123 return IPVS_SYNC_QLEN_MAX;
1124}
1125
1126static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs)
1127{
1128 return 0;
1129}
1130
1131static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs)
1132{
1133 return 1;
1134}
1135
1136static inline int sysctl_backup_only(struct netns_ipvs *ipvs)
1137{
1138 return 0;
1139}
1140
1141static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs)
1142{
1143 return 1;
1144}
1145
1146static inline int sysctl_expire_nodest_conn(struct netns_ipvs *ipvs)
1147{
1148 return 0;
1149}
1150
1151static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs)
1152{
1153 return 0;
1154}
1155
1156static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs)
1157{
1158 return 0;
1159}
1160
1161static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs)
1162{
1163 return 0;
1164}
1165
1166#endif
1167
1168
1169
1170
1171const char *ip_vs_proto_name(unsigned int proto);
1172void ip_vs_init_hash_table(struct list_head *table, int rows);
1173struct ip_vs_conn *ip_vs_new_conn_out(struct ip_vs_service *svc,
1174 struct ip_vs_dest *dest,
1175 struct sk_buff *skb,
1176 const struct ip_vs_iphdr *iph,
1177 __be16 dport,
1178 __be16 cport);
1179#define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t)))
1180
1181#define IP_VS_APP_TYPE_FTP 1
1182
1183
1184
1185
1186enum {
1187 IP_VS_DIR_INPUT = 0,
1188 IP_VS_DIR_OUTPUT,
1189 IP_VS_DIR_INPUT_ONLY,
1190 IP_VS_DIR_LAST,
1191};
1192
1193static inline void ip_vs_conn_fill_param(struct netns_ipvs *ipvs, int af, int protocol,
1194 const union nf_inet_addr *caddr,
1195 __be16 cport,
1196 const union nf_inet_addr *vaddr,
1197 __be16 vport,
1198 struct ip_vs_conn_param *p)
1199{
1200 p->ipvs = ipvs;
1201 p->af = af;
1202 p->protocol = protocol;
1203 p->caddr = caddr;
1204 p->cport = cport;
1205 p->vaddr = vaddr;
1206 p->vport = vport;
1207 p->pe = NULL;
1208 p->pe_data = NULL;
1209}
1210
1211struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p);
1212struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p);
1213
1214struct ip_vs_conn * ip_vs_conn_in_get_proto(struct netns_ipvs *ipvs, int af,
1215 const struct sk_buff *skb,
1216 const struct ip_vs_iphdr *iph);
1217
1218struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p);
1219
1220struct ip_vs_conn * ip_vs_conn_out_get_proto(struct netns_ipvs *ipvs, int af,
1221 const struct sk_buff *skb,
1222 const struct ip_vs_iphdr *iph);
1223
1224
1225
1226
1227
1228static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp)
1229{
1230 return refcount_inc_not_zero(&cp->refcnt);
1231}
1232
1233
1234static inline void __ip_vs_conn_put(struct ip_vs_conn *cp)
1235{
1236 smp_mb__before_atomic();
1237 refcount_dec(&cp->refcnt);
1238}
1239void ip_vs_conn_put(struct ip_vs_conn *cp);
1240void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport);
1241
1242struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af,
1243 const union nf_inet_addr *daddr,
1244 __be16 dport, unsigned int flags,
1245 struct ip_vs_dest *dest, __u32 fwmark);
1246void ip_vs_conn_expire_now(struct ip_vs_conn *cp);
1247
1248const char *ip_vs_state_name(const struct ip_vs_conn *cp);
1249
1250void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp);
1251int ip_vs_check_template(struct ip_vs_conn *ct, struct ip_vs_dest *cdest);
1252void ip_vs_random_dropentry(struct netns_ipvs *ipvs);
1253int ip_vs_conn_init(void);
1254void ip_vs_conn_cleanup(void);
1255
1256static inline void ip_vs_control_del(struct ip_vs_conn *cp)
1257{
1258 struct ip_vs_conn *ctl_cp = cp->control;
1259 if (!ctl_cp) {
1260 IP_VS_ERR_BUF("request control DEL for uncontrolled: "
1261 "%s:%d to %s:%d\n",
1262 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1263 ntohs(cp->cport),
1264 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1265 ntohs(cp->vport));
1266
1267 return;
1268 }
1269
1270 IP_VS_DBG_BUF(7, "DELeting control for: "
1271 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1272 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1273 ntohs(cp->cport),
1274 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
1275 ntohs(ctl_cp->cport));
1276
1277 cp->control = NULL;
1278 if (atomic_read(&ctl_cp->n_control) == 0) {
1279 IP_VS_ERR_BUF("BUG control DEL with n=0 : "
1280 "%s:%d to %s:%d\n",
1281 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1282 ntohs(cp->cport),
1283 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1284 ntohs(cp->vport));
1285
1286 return;
1287 }
1288 atomic_dec(&ctl_cp->n_control);
1289}
1290
1291static inline void
1292ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp)
1293{
1294 if (cp->control) {
1295 IP_VS_ERR_BUF("request control ADD for already controlled: "
1296 "%s:%d to %s:%d\n",
1297 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1298 ntohs(cp->cport),
1299 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
1300 ntohs(cp->vport));
1301
1302 ip_vs_control_del(cp);
1303 }
1304
1305 IP_VS_DBG_BUF(7, "ADDing control for: "
1306 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
1307 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
1308 ntohs(cp->cport),
1309 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
1310 ntohs(ctl_cp->cport));
1311
1312 cp->control = ctl_cp;
1313 atomic_inc(&ctl_cp->n_control);
1314}
1315
1316
1317static inline void
1318ip_vs_control_assure_ct(struct ip_vs_conn *cp)
1319{
1320 struct ip_vs_conn *ct = cp->control;
1321
1322 if (ct && !(ct->state & IP_VS_CTPL_S_ASSURED) &&
1323 (ct->flags & IP_VS_CONN_F_TEMPLATE))
1324 ct->state |= IP_VS_CTPL_S_ASSURED;
1325}
1326
1327
1328int ip_vs_estimator_net_init(struct netns_ipvs *ipvs);
1329int ip_vs_control_net_init(struct netns_ipvs *ipvs);
1330int ip_vs_protocol_net_init(struct netns_ipvs *ipvs);
1331int ip_vs_app_net_init(struct netns_ipvs *ipvs);
1332int ip_vs_conn_net_init(struct netns_ipvs *ipvs);
1333int ip_vs_sync_net_init(struct netns_ipvs *ipvs);
1334void ip_vs_conn_net_cleanup(struct netns_ipvs *ipvs);
1335void ip_vs_app_net_cleanup(struct netns_ipvs *ipvs);
1336void ip_vs_protocol_net_cleanup(struct netns_ipvs *ipvs);
1337void ip_vs_control_net_cleanup(struct netns_ipvs *ipvs);
1338void ip_vs_estimator_net_cleanup(struct netns_ipvs *ipvs);
1339void ip_vs_sync_net_cleanup(struct netns_ipvs *ipvs);
1340void ip_vs_service_nets_cleanup(struct list_head *net_list);
1341
1342
1343
1344
1345#define IP_VS_APP_MAX_PORTS 8
1346struct ip_vs_app *register_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app);
1347void unregister_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app);
1348int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
1349void ip_vs_unbind_app(struct ip_vs_conn *cp);
1350int register_ip_vs_app_inc(struct netns_ipvs *ipvs, struct ip_vs_app *app, __u16 proto,
1351 __u16 port);
1352int ip_vs_app_inc_get(struct ip_vs_app *inc);
1353void ip_vs_app_inc_put(struct ip_vs_app *inc);
1354
1355int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb,
1356 struct ip_vs_iphdr *ipvsh);
1357int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb,
1358 struct ip_vs_iphdr *ipvsh);
1359
1360int register_ip_vs_pe(struct ip_vs_pe *pe);
1361int unregister_ip_vs_pe(struct ip_vs_pe *pe);
1362struct ip_vs_pe *ip_vs_pe_getbyname(const char *name);
1363struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name);
1364
1365
1366#define ip_vs_pe_get(pe) \
1367 if (pe && pe->module) \
1368 __module_get(pe->module);
1369
1370#define ip_vs_pe_put(pe) \
1371 if (pe && pe->module) \
1372 module_put(pe->module);
1373
1374
1375int ip_vs_protocol_init(void);
1376void ip_vs_protocol_cleanup(void);
1377void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags);
1378int *ip_vs_create_timeout_table(int *table, int size);
1379void ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp,
1380 const struct sk_buff *skb, int offset,
1381 const char *msg);
1382
1383extern struct ip_vs_protocol ip_vs_protocol_tcp;
1384extern struct ip_vs_protocol ip_vs_protocol_udp;
1385extern struct ip_vs_protocol ip_vs_protocol_icmp;
1386extern struct ip_vs_protocol ip_vs_protocol_esp;
1387extern struct ip_vs_protocol ip_vs_protocol_ah;
1388extern struct ip_vs_protocol ip_vs_protocol_sctp;
1389
1390
1391
1392
1393int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
1394int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
1395int ip_vs_bind_scheduler(struct ip_vs_service *svc,
1396 struct ip_vs_scheduler *scheduler);
1397void ip_vs_unbind_scheduler(struct ip_vs_service *svc,
1398 struct ip_vs_scheduler *sched);
1399struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name);
1400void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler);
1401struct ip_vs_conn *
1402ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb,
1403 struct ip_vs_proto_data *pd, int *ignored,
1404 struct ip_vs_iphdr *iph);
1405int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
1406 struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph);
1407
1408void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg);
1409
1410
1411extern struct ip_vs_stats ip_vs_stats;
1412extern int sysctl_ip_vs_sync_ver;
1413
1414struct ip_vs_service *
1415ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol,
1416 const union nf_inet_addr *vaddr, __be16 vport);
1417
1418bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
1419 const union nf_inet_addr *daddr, __be16 dport);
1420
1421struct ip_vs_dest *
1422ip_vs_find_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol,
1423 const union nf_inet_addr *daddr, __be16 dport);
1424struct ip_vs_dest *ip_vs_find_tunnel(struct netns_ipvs *ipvs, int af,
1425 const union nf_inet_addr *daddr,
1426 __be16 tun_port);
1427
1428int ip_vs_use_count_inc(void);
1429void ip_vs_use_count_dec(void);
1430int ip_vs_register_nl_ioctl(void);
1431void ip_vs_unregister_nl_ioctl(void);
1432int ip_vs_control_init(void);
1433void ip_vs_control_cleanup(void);
1434struct ip_vs_dest *
1435ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af,
1436 const union nf_inet_addr *daddr, __be16 dport,
1437 const union nf_inet_addr *vaddr, __be16 vport,
1438 __u16 protocol, __u32 fwmark, __u32 flags);
1439void ip_vs_try_bind_dest(struct ip_vs_conn *cp);
1440
1441static inline void ip_vs_dest_hold(struct ip_vs_dest *dest)
1442{
1443 refcount_inc(&dest->refcnt);
1444}
1445
1446static inline void ip_vs_dest_put(struct ip_vs_dest *dest)
1447{
1448 smp_mb__before_atomic();
1449 refcount_dec(&dest->refcnt);
1450}
1451
1452static inline void ip_vs_dest_put_and_free(struct ip_vs_dest *dest)
1453{
1454 if (refcount_dec_and_test(&dest->refcnt))
1455 kfree(dest);
1456}
1457
1458
1459
1460
1461int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *cfg,
1462 int state);
1463int stop_sync_thread(struct netns_ipvs *ipvs, int state);
1464void ip_vs_sync_conn(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, int pkts);
1465
1466
1467void ip_vs_start_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats);
1468void ip_vs_stop_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats);
1469void ip_vs_zero_estimator(struct ip_vs_stats *stats);
1470void ip_vs_read_estimator(struct ip_vs_kstats *dst, struct ip_vs_stats *stats);
1471
1472
1473int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1474 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1475int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1476 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1477int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1478 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1479int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1480 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1481int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1482 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1483int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
1484 struct ip_vs_protocol *pp, int offset,
1485 unsigned int hooknum, struct ip_vs_iphdr *iph);
1486void ip_vs_dest_dst_rcu_free(struct rcu_head *head);
1487
1488#ifdef CONFIG_IP_VS_IPV6
1489int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1490 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1491int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1492 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1493int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1494 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1495int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1496 struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph);
1497int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
1498 struct ip_vs_protocol *pp, int offset,
1499 unsigned int hooknum, struct ip_vs_iphdr *iph);
1500#endif
1501
1502#ifdef CONFIG_SYSCTL
1503
1504
1505
1506
1507static inline int ip_vs_todrop(struct netns_ipvs *ipvs)
1508{
1509 if (!ipvs->drop_rate)
1510 return 0;
1511 if (--ipvs->drop_counter > 0)
1512 return 0;
1513 ipvs->drop_counter = ipvs->drop_rate;
1514 return 1;
1515}
1516#else
1517static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; }
1518#endif
1519
1520#ifdef CONFIG_SYSCTL
1521
1522
1523
1524static inline void ip_vs_enqueue_expire_nodest_conns(struct netns_ipvs *ipvs)
1525{
1526 if (sysctl_expire_nodest_conn(ipvs))
1527 queue_delayed_work(system_long_wq,
1528 &ipvs->expire_nodest_conn_work, 1);
1529}
1530
1531void ip_vs_expire_nodest_conn_flush(struct netns_ipvs *ipvs);
1532#else
1533static inline void ip_vs_enqueue_expire_nodest_conns(struct netns_ipvs *ipvs) {}
1534#endif
1535
1536#define IP_VS_DFWD_METHOD(dest) (atomic_read(&(dest)->conn_flags) & \
1537 IP_VS_CONN_F_FWD_MASK)
1538
1539
1540#define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK)
1541
1542static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp)
1543{
1544 char fwd;
1545
1546 switch (IP_VS_FWD_METHOD(cp)) {
1547 case IP_VS_CONN_F_MASQ:
1548 fwd = 'M'; break;
1549 case IP_VS_CONN_F_LOCALNODE:
1550 fwd = 'L'; break;
1551 case IP_VS_CONN_F_TUNNEL:
1552 fwd = 'T'; break;
1553 case IP_VS_CONN_F_DROUTE:
1554 fwd = 'R'; break;
1555 case IP_VS_CONN_F_BYPASS:
1556 fwd = 'B'; break;
1557 default:
1558 fwd = '?'; break;
1559 }
1560 return fwd;
1561}
1562
1563void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
1564 struct ip_vs_conn *cp, int dir);
1565
1566#ifdef CONFIG_IP_VS_IPV6
1567void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp,
1568 struct ip_vs_conn *cp, int dir);
1569#endif
1570
1571__sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset);
1572
1573static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum)
1574{
1575 __be32 diff[2] = { ~old, new };
1576
1577 return csum_partial(diff, sizeof(diff), oldsum);
1578}
1579
1580#ifdef CONFIG_IP_VS_IPV6
1581static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new,
1582 __wsum oldsum)
1583{
1584 __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0],
1585 new[3], new[2], new[1], new[0] };
1586
1587 return csum_partial(diff, sizeof(diff), oldsum);
1588}
1589#endif
1590
1591static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum)
1592{
1593 __be16 diff[2] = { ~old, new };
1594
1595 return csum_partial(diff, sizeof(diff), oldsum);
1596}
1597
1598
1599static inline void ip_vs_notrack(struct sk_buff *skb)
1600{
1601#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1602 enum ip_conntrack_info ctinfo;
1603 struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
1604
1605 if (ct) {
1606 nf_conntrack_put(&ct->ct_general);
1607 nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
1608 }
1609#endif
1610}
1611
1612#ifdef CONFIG_IP_VS_NFCT
1613
1614
1615
1616static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs)
1617{
1618#ifdef CONFIG_SYSCTL
1619 return ipvs->sysctl_conntrack;
1620#else
1621 return 0;
1622#endif
1623}
1624
1625void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp,
1626 int outin);
1627int ip_vs_confirm_conntrack(struct sk_buff *skb);
1628void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct,
1629 struct ip_vs_conn *cp, u_int8_t proto,
1630 const __be16 port, int from_rs);
1631void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp);
1632
1633#else
1634
1635static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs)
1636{
1637 return 0;
1638}
1639
1640static inline void ip_vs_update_conntrack(struct sk_buff *skb,
1641 struct ip_vs_conn *cp, int outin)
1642{
1643}
1644
1645static inline int ip_vs_confirm_conntrack(struct sk_buff *skb)
1646{
1647 return NF_ACCEPT;
1648}
1649
1650static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp)
1651{
1652}
1653#endif
1654
1655
1656static inline bool ip_vs_conn_uses_old_conntrack(struct ip_vs_conn *cp,
1657 struct sk_buff *skb)
1658{
1659#ifdef CONFIG_IP_VS_NFCT
1660 enum ip_conntrack_info ctinfo;
1661 struct nf_conn *ct;
1662
1663 ct = nf_ct_get(skb, &ctinfo);
1664 if (ct && nf_ct_is_confirmed(ct))
1665 return true;
1666#endif
1667 return false;
1668}
1669
1670static inline int ip_vs_register_conntrack(struct ip_vs_service *svc)
1671{
1672#if IS_ENABLED(CONFIG_NF_CONNTRACK)
1673 int afmask = (svc->af == AF_INET6) ? 2 : 1;
1674 int ret = 0;
1675
1676 if (!(svc->conntrack_afmask & afmask)) {
1677 ret = nf_ct_netns_get(svc->ipvs->net, svc->af);
1678 if (ret >= 0)
1679 svc->conntrack_afmask |= afmask;
1680 }
1681 return ret;
1682#else
1683 return 0;
1684#endif
1685}
1686
1687static inline void ip_vs_unregister_conntrack(struct ip_vs_service *svc)
1688{
1689#if IS_ENABLED(CONFIG_NF_CONNTRACK)
1690 int afmask = (svc->af == AF_INET6) ? 2 : 1;
1691
1692 if (svc->conntrack_afmask & afmask) {
1693 nf_ct_netns_put(svc->ipvs->net, svc->af);
1694 svc->conntrack_afmask &= ~afmask;
1695 }
1696#endif
1697}
1698
1699int ip_vs_register_hooks(struct netns_ipvs *ipvs, unsigned int af);
1700void ip_vs_unregister_hooks(struct netns_ipvs *ipvs, unsigned int af);
1701
1702static inline int
1703ip_vs_dest_conn_overhead(struct ip_vs_dest *dest)
1704{
1705
1706
1707
1708
1709
1710
1711 return (atomic_read(&dest->activeconns) << 8) +
1712 atomic_read(&dest->inactconns);
1713}
1714
1715#ifdef CONFIG_IP_VS_PROTO_TCP
1716INDIRECT_CALLABLE_DECLARE(int
1717 tcp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
1718 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph));
1719#endif
1720
1721#ifdef CONFIG_IP_VS_PROTO_UDP
1722INDIRECT_CALLABLE_DECLARE(int
1723 udp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp,
1724 struct ip_vs_conn *cp, struct ip_vs_iphdr *iph));
1725#endif
1726#endif
1727