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netfilter: ctnetlink: add expectation deletion events
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / net / ip_vs.h
CommitLineData
1da177e4
LT		 1/*
2 * IP Virtual Server
3 * data structure and functionality definitions
4 */
5
bc4768eb
JV		 6#ifndef _NET_IP_VS_H
7#define _NET_IP_VS_H
1da177e4 8
bc4768eb 9#include <linux/ip_vs.h> /* definitions shared with userland */
1da177e4 10
bc4768eb 11/* old ipvsadm versions still include this file directly */
1da177e4
LT		 12#ifdef __KERNEL__
13
bc4768eb
JV		 14#include <asm/types.h> /* for __uXX types */
15
16#include <linux/sysctl.h> /* for ctl_path */
1da177e4
LT		 17#include <linux/list.h> /* for struct list_head */
18#include <linux/spinlock.h> /* for struct rwlock_t */
1da177e4 19#include <asm/atomic.h> /* for struct atomic_t */
1da177e4 20#include <linux/compiler.h>
14c85021 21#include <linux/timer.h>
1da177e4 22
14c85021 23#include <net/checksum.h>
e7ade46a 24#include <linux/netfilter.h> /* for union nf_inet_addr */
1668e010 25#include <linux/ip.h>
e7ade46a
JV		 26#include <linux/ipv6.h> /* for struct ipv6hdr */
27#include <net/ipv6.h> /* for ipv6_addr_copy */
f4bc17cd
JA		 28#ifdef CONFIG_IP_VS_NFCT
29#include <net/netfilter/nf_conntrack.h>
30#endif
6f7edb48
CB		 31
32/* Connections' size value needed by ip_vs_ctl.c */
33extern int ip_vs_conn_tab_size;
34
35
64aae3cb
JV		 36struct ip_vs_iphdr {
37 int len;
38 __u8 protocol;
39 union nf_inet_addr saddr;
40 union nf_inet_addr daddr;
41};
42
43static inline void
44ip_vs_fill_iphdr(int af, const void *nh, struct ip_vs_iphdr *iphdr)
45{
46#ifdef CONFIG_IP_VS_IPV6
47 if (af == AF_INET6) {
48 const struct ipv6hdr *iph = nh;
49 iphdr->len = sizeof(struct ipv6hdr);
50 iphdr->protocol = iph->nexthdr;
51 ipv6_addr_copy(&iphdr->saddr.in6, &iph->saddr);
52 ipv6_addr_copy(&iphdr->daddr.in6, &iph->daddr);
53 } else
54#endif
55 {
56 const struct iphdr *iph = nh;
57 iphdr->len = iph->ihl * 4;
58 iphdr->protocol = iph->protocol;
59 iphdr->saddr.ip = iph->saddr;
60 iphdr->daddr.ip = iph->daddr;
61 }
62}
63
64static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst,
65 const union nf_inet_addr *src)
66{
67#ifdef CONFIG_IP_VS_IPV6
68 if (af == AF_INET6)
69 ipv6_addr_copy(&dst->in6, &src->in6);
70 else
71#endif
72 dst->ip = src->ip;
73}
74
75static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a,
76 const union nf_inet_addr *b)
77{
78#ifdef CONFIG_IP_VS_IPV6
79 if (af == AF_INET6)
80 return ipv6_addr_equal(&a->in6, &b->in6);
81#endif
82 return a->ip == b->ip;
83}
84
1da177e4 85#ifdef CONFIG_IP_VS_DEBUG
14c85021
ACM		 86#include <linux/net.h>
87
1da177e4 88extern int ip_vs_get_debug_level(void);
c842a3ad
JV		 89
90static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len,
91 const union nf_inet_addr *addr,
92 int *idx)
93{
94 int len;
95#ifdef CONFIG_IP_VS_IPV6
96 if (af == AF_INET6)
5b095d98 97 len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6]",
0c6ce78a 98 &addr->in6) + 1;
c842a3ad
JV		 99 else
100#endif
3685f25d
HH		 101 len = snprintf(&buf[*idx], buf_len - *idx, "%pI4",
102 &addr->ip) + 1;
c842a3ad
JV		 103
104 *idx += len;
105 BUG_ON(*idx > buf_len + 1);
106 return &buf[*idx - len];
107}
108
9aada7ac
HE		 109#define IP_VS_DBG_BUF(level, msg, ...) \
110 do { \
111 char ip_vs_dbg_buf[160]; \
112 int ip_vs_dbg_idx = 0; \
113 if (level <= ip_vs_get_debug_level()) \
114 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
115 } while (0)
116#define IP_VS_ERR_BUF(msg...) \
117 do { \
118 char ip_vs_dbg_buf[160]; \
119 int ip_vs_dbg_idx = 0; \
120 pr_err(msg); \
121 } while (0)
c842a3ad
JV		 122
123/* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */
9aada7ac
HE		 124#define IP_VS_DBG_ADDR(af, addr) \
125 ip_vs_dbg_addr(af, ip_vs_dbg_buf, \
126 sizeof(ip_vs_dbg_buf), addr, \
127 &ip_vs_dbg_idx)
128
129#define IP_VS_DBG(level, msg, ...) \
130 do { \
131 if (level <= ip_vs_get_debug_level()) \
132 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
133 } while (0)
134#define IP_VS_DBG_RL(msg, ...) \
135 do { \
136 if (net_ratelimit()) \
137 printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \
138 } while (0)
139#define IP_VS_DBG_PKT(level, pp, skb, ofs, msg) \
140 do { \
141 if (level <= ip_vs_get_debug_level()) \
142 pp->debug_packet(pp, skb, ofs, msg); \
143 } while (0)
144#define IP_VS_DBG_RL_PKT(level, pp, skb, ofs, msg) \
145 do { \
146 if (level <= ip_vs_get_debug_level() && \
147 net_ratelimit()) \
148 pp->debug_packet(pp, skb, ofs, msg); \
149 } while (0)
1da177e4 150#else /* NO DEBUGGING at ALL */
c842a3ad
JV		 151#define IP_VS_DBG_BUF(level, msg...) do {} while (0)
152#define IP_VS_ERR_BUF(msg...) do {} while (0)
1da177e4
LT		 153#define IP_VS_DBG(level, msg...) do {} while (0)
154#define IP_VS_DBG_RL(msg...) do {} while (0)
155#define IP_VS_DBG_PKT(level, pp, skb, ofs, msg) do {} while (0)
156#define IP_VS_DBG_RL_PKT(level, pp, skb, ofs, msg) do {} while (0)
157#endif
158
159#define IP_VS_BUG() BUG()
1e3e238e 160#define IP_VS_ERR_RL(msg, ...) \
9aada7ac
HE		 161 do { \
162 if (net_ratelimit()) \
1e3e238e 163 pr_err(msg, ##__VA_ARGS__); \
9aada7ac 164 } while (0)
1da177e4
LT		 165
166#ifdef CONFIG_IP_VS_DEBUG
167#define EnterFunction(level) \
9aada7ac
HE		 168 do { \
169 if (level <= ip_vs_get_debug_level()) \
170 printk(KERN_DEBUG \
171 pr_fmt("Enter: %s, %s line %i\n"), \
172 __func__, __FILE__, __LINE__); \
173 } while (0)
174#define LeaveFunction(level) \
175 do { \
176 if (level <= ip_vs_get_debug_level()) \
177 printk(KERN_DEBUG \
178 pr_fmt("Leave: %s, %s line %i\n"), \
179 __func__, __FILE__, __LINE__); \
180 } while (0)
1da177e4
LT		 181#else
182#define EnterFunction(level) do {} while (0)
183#define LeaveFunction(level) do {} while (0)
184#endif
185
186#define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); }
187
188
189/*
190 * The port number of FTP service (in network order).
191 */
f3a7c66b
HH		 192#define FTPPORT cpu_to_be16(21)
193#define FTPDATA cpu_to_be16(20)
1da177e4 194
1da177e4
LT		 195/*
196 * TCP State Values
197 */
198enum {
199 IP_VS_TCP_S_NONE = 0,
200 IP_VS_TCP_S_ESTABLISHED,
201 IP_VS_TCP_S_SYN_SENT,
202 IP_VS_TCP_S_SYN_RECV,
203 IP_VS_TCP_S_FIN_WAIT,
204 IP_VS_TCP_S_TIME_WAIT,
205 IP_VS_TCP_S_CLOSE,
206 IP_VS_TCP_S_CLOSE_WAIT,
207 IP_VS_TCP_S_LAST_ACK,
208 IP_VS_TCP_S_LISTEN,
209 IP_VS_TCP_S_SYNACK,
210 IP_VS_TCP_S_LAST
211};
212
213/*
214 * UDP State Values
215 */
216enum {
217 IP_VS_UDP_S_NORMAL,
218 IP_VS_UDP_S_LAST,
219};
220
221/*
222 * ICMP State Values
223 */
224enum {
225 IP_VS_ICMP_S_NORMAL,
226 IP_VS_ICMP_S_LAST,
227};
228
2906f66a
VMR		 229/*
230 * SCTP State Values
231 */
232enum ip_vs_sctp_states {
233 IP_VS_SCTP_S_NONE,
234 IP_VS_SCTP_S_INIT_CLI,
235 IP_VS_SCTP_S_INIT_SER,
236 IP_VS_SCTP_S_INIT_ACK_CLI,
237 IP_VS_SCTP_S_INIT_ACK_SER,
238 IP_VS_SCTP_S_ECHO_CLI,
239 IP_VS_SCTP_S_ECHO_SER,
240 IP_VS_SCTP_S_ESTABLISHED,
241 IP_VS_SCTP_S_SHUT_CLI,
242 IP_VS_SCTP_S_SHUT_SER,
243 IP_VS_SCTP_S_SHUT_ACK_CLI,
244 IP_VS_SCTP_S_SHUT_ACK_SER,
245 IP_VS_SCTP_S_CLOSED,
246 IP_VS_SCTP_S_LAST
247};
248
1da177e4
LT		 249/*
250 * Delta sequence info structure
251 * Each ip_vs_conn has 2 (output AND input seq. changes).
252 * Only used in the VS/NAT.
253 */
254struct ip_vs_seq {
255 __u32 init_seq; /* Add delta from this seq */
256 __u32 delta; /* Delta in sequence numbers */
257 __u32 previous_delta; /* Delta in sequence numbers
258 before last resized pkt */
259};
260
261
262/*
3a14a313 263 * IPVS statistics objects
1da177e4 264 */
3a14a313
SW		 265struct ip_vs_estimator {
266 struct list_head list;
267
268 u64 last_inbytes;
269 u64 last_outbytes;
270 u32 last_conns;
271 u32 last_inpkts;
272 u32 last_outpkts;
273
274 u32 cps;
275 u32 inpps;
276 u32 outpps;
277 u32 inbps;
278 u32 outbps;
279};
280
fd2c3ef7 281struct ip_vs_stats {
e9c0ce23
SW		 282 struct ip_vs_stats_user ustats; /* statistics */
283 struct ip_vs_estimator est; /* estimator */
3a14a313 284
1da177e4
LT		 285 spinlock_t lock; /* spin lock */
286};
287
14c85021
ACM		 288struct dst_entry;
289struct iphdr;
1da177e4
LT		 290struct ip_vs_conn;
291struct ip_vs_app;
14c85021 292struct sk_buff;
1da177e4
LT		 293
294struct ip_vs_protocol {
295 struct ip_vs_protocol *next;
296 char *name;
2ad17def
JA		 297 u16 protocol;
298 u16 num_states;
1da177e4
LT		 299 int dont_defrag;
300 atomic_t appcnt; /* counter of proto app incs */
301 int *timeout_table; /* protocol timeout table */
302
303 void (*init)(struct ip_vs_protocol *pp);
304
305 void (*exit)(struct ip_vs_protocol *pp);
306
51ef348b 307 int (*conn_schedule)(int af, struct sk_buff *skb,
1da177e4
LT		 308 struct ip_vs_protocol *pp,
309 int *verdict, struct ip_vs_conn **cpp);
310
311 struct ip_vs_conn *
51ef348b
JV		 312 (*conn_in_get)(int af,
313 const struct sk_buff *skb,
1da177e4 314 struct ip_vs_protocol *pp,
51ef348b 315 const struct ip_vs_iphdr *iph,
1da177e4
LT		 316 unsigned int proto_off,
317 int inverse);
318
319 struct ip_vs_conn *
51ef348b
JV		 320 (*conn_out_get)(int af,
321 const struct sk_buff *skb,
1da177e4 322 struct ip_vs_protocol *pp,
51ef348b 323 const struct ip_vs_iphdr *iph,
1da177e4
LT		 324 unsigned int proto_off,
325 int inverse);
326
3db05fea 327 int (*snat_handler)(struct sk_buff *skb,
1da177e4
LT		 328 struct ip_vs_protocol *pp, struct ip_vs_conn *cp);
329
3db05fea 330 int (*dnat_handler)(struct sk_buff *skb,
1da177e4
LT		 331 struct ip_vs_protocol *pp, struct ip_vs_conn *cp);
332
51ef348b
JV		 333 int (*csum_check)(int af, struct sk_buff *skb,
334 struct ip_vs_protocol *pp);
1da177e4
LT		 335
336 const char *(*state_name)(int state);
337
338 int (*state_transition)(struct ip_vs_conn *cp, int direction,
339 const struct sk_buff *skb,
340 struct ip_vs_protocol *pp);
341
342 int (*register_app)(struct ip_vs_app *inc);
343
344 void (*unregister_app)(struct ip_vs_app *inc);
345
346 int (*app_conn_bind)(struct ip_vs_conn *cp);
347
348 void (*debug_packet)(struct ip_vs_protocol *pp,
349 const struct sk_buff *skb,
350 int offset,
351 const char *msg);
352
353 void (*timeout_change)(struct ip_vs_protocol *pp, int flags);
354
355 int (*set_state_timeout)(struct ip_vs_protocol *pp, char *sname, int to);
356};
357
358extern struct ip_vs_protocol * ip_vs_proto_get(unsigned short proto);
359
f11017ec
SH		 360struct ip_vs_conn_param {
361 const union nf_inet_addr *caddr;
362 const union nf_inet_addr *vaddr;
363 __be16 cport;
364 __be16 vport;
365 __u16 protocol;
366 u16 af;
85999283
SH		 367
368 const struct ip_vs_pe *pe;
369 char *pe_data;
370 __u8 pe_data_len;
f11017ec
SH		 371};
372
1da177e4
LT		 373/*
374 * IP_VS structure allocated for each dynamically scheduled connection
375 */
376struct ip_vs_conn {
377 struct list_head c_list; /* hashed list heads */
378
379 /* Protocol, addresses and port numbers */
e7ade46a
JV		 380 u16 af; /* address family */
381 union nf_inet_addr caddr; /* client address */
382 union nf_inet_addr vaddr; /* virtual address */
383 union nf_inet_addr daddr; /* destination address */
3575792e 384 volatile __u32 flags; /* status flags */
014d730d
AV		 385 __be16 cport;
386 __be16 vport;
387 __be16 dport;
1da177e4
LT		 388 __u16 protocol; /* Which protocol (TCP/UDP) */
389
390 /* counter and timer */
391 atomic_t refcnt; /* reference count */
392 struct timer_list timer; /* Expiration timer */
393 volatile unsigned long timeout; /* timeout */
394
395 /* Flags and state transition */
396 spinlock_t lock; /* lock for state transition */
1da177e4 397 volatile __u16 state; /* state info */
efac5276
RB		 398 volatile __u16 old_state; /* old state, to be used for
399 * state transition triggerd
400 * synchronization
401 */
1da177e4
LT		 402
403 /* Control members */
404 struct ip_vs_conn *control; /* Master control connection */
405 atomic_t n_control; /* Number of controlled ones */
406 struct ip_vs_dest *dest; /* real server */
407 atomic_t in_pkts; /* incoming packet counter */
408
409 /* packet transmitter for different forwarding methods. If it
410 mangles the packet, it must return NF_DROP or better NF_STOLEN,
411 otherwise this must be changed to a sk_buff **.
412 */
413 int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp,
414 struct ip_vs_protocol *pp);
415
416 /* Note: we can group the following members into a structure,
417 in order to save more space, and the following members are
418 only used in VS/NAT anyway */
419 struct ip_vs_app *app; /* bound ip_vs_app object */
420 void *app_data; /* Application private data */
421 struct ip_vs_seq in_seq; /* incoming seq. struct */
422 struct ip_vs_seq out_seq; /* outgoing seq. struct */
85999283
SH		 423
424 char *pe_data;
425 __u8 pe_data_len;
1da177e4
LT		 426};
427
428
c860c6b1
JV		 429/*
430 * Extended internal versions of struct ip_vs_service_user and
431 * ip_vs_dest_user for IPv6 support.
432 *
433 * We need these to conveniently pass around service and destination
434 * options, but unfortunately, we also need to keep the old definitions to
435 * maintain userspace backwards compatibility for the setsockopt interface.
436 */
437struct ip_vs_service_user_kern {
438 /* virtual service addresses */
439 u16 af;
440 u16 protocol;
441 union nf_inet_addr addr; /* virtual ip address */
442 u16 port;
443 u32 fwmark; /* firwall mark of service */
444
445 /* virtual service options */
446 char *sched_name;
0d1e71b0 447 char *pe_name;
c860c6b1
JV		 448 unsigned flags; /* virtual service flags */
449 unsigned timeout; /* persistent timeout in sec */
450 u32 netmask; /* persistent netmask */
451};
452
453
454struct ip_vs_dest_user_kern {
455 /* destination server address */
456 union nf_inet_addr addr;
457 u16 port;
458
459 /* real server options */
460 unsigned conn_flags; /* connection flags */
461 int weight; /* destination weight */
462
463 /* thresholds for active connections */
464 u32 u_threshold; /* upper threshold */
465 u32 l_threshold; /* lower threshold */
466};
467
468
1da177e4
LT		 469/*
470 * The information about the virtual service offered to the net
471 * and the forwarding entries
472 */
473struct ip_vs_service {
474 struct list_head s_list; /* for normal service table */
475 struct list_head f_list; /* for fwmark-based service table */
476 atomic_t refcnt; /* reference counter */
477 atomic_t usecnt; /* use counter */
478
e7ade46a 479 u16 af; /* address family */
1da177e4 480 __u16 protocol; /* which protocol (TCP/UDP) */
e7ade46a 481 union nf_inet_addr addr; /* IP address for virtual service */
014d730d 482 __be16 port; /* port number for the service */
1da177e4
LT		 483 __u32 fwmark; /* firewall mark of the service */
484 unsigned flags; /* service status flags */
485 unsigned timeout; /* persistent timeout in ticks */
014d730d 486 __be32 netmask; /* grouping granularity */
1da177e4
LT		 487
488 struct list_head destinations; /* real server d-linked list */
489 __u32 num_dests; /* number of servers */
490 struct ip_vs_stats stats; /* statistics for the service */
491 struct ip_vs_app *inc; /* bind conns to this app inc */
492
493 /* for scheduling */
494 struct ip_vs_scheduler *scheduler; /* bound scheduler object */
495 rwlock_t sched_lock; /* lock sched_data */
496 void *sched_data; /* scheduler application data */
85999283
SH		 497
498 /* alternate persistence engine */
499 struct ip_vs_pe *pe;
1da177e4
LT		 500};
501
502
503/*
504 * The real server destination forwarding entry
505 * with ip address, port number, and so on.
506 */
507struct ip_vs_dest {
508 struct list_head n_list; /* for the dests in the service */
509 struct list_head d_list; /* for table with all the dests */
510
e7ade46a
JV		 511 u16 af; /* address family */
512 union nf_inet_addr addr; /* IP address of the server */
014d730d 513 __be16 port; /* port number of the server */
1da177e4
LT		 514 volatile unsigned flags; /* dest status flags */
515 atomic_t conn_flags; /* flags to copy to conn */
516 atomic_t weight; /* server weight */
517
518 atomic_t refcnt; /* reference counter */
519 struct ip_vs_stats stats; /* statistics */
520
521 /* connection counters and thresholds */
522 atomic_t activeconns; /* active connections */
523 atomic_t inactconns; /* inactive connections */
524 atomic_t persistconns; /* persistent connections */
525 __u32 u_threshold; /* upper threshold */
526 __u32 l_threshold; /* lower threshold */
527
528 /* for destination cache */
529 spinlock_t dst_lock; /* lock of dst_cache */
530 struct dst_entry *dst_cache; /* destination cache entry */
531 u32 dst_rtos; /* RT_TOS(tos) for dst */
532
533 /* for virtual service */
534 struct ip_vs_service *svc; /* service it belongs to */
535 __u16 protocol; /* which protocol (TCP/UDP) */
e7ade46a 536 union nf_inet_addr vaddr; /* virtual IP address */
014d730d 537 __be16 vport; /* virtual port number */
1da177e4
LT		 538 __u32 vfwmark; /* firewall mark of service */
539};
540
541
542/*
543 * The scheduler object
544 */
545struct ip_vs_scheduler {
546 struct list_head n_list; /* d-linked list head */
547 char *name; /* scheduler name */
548 atomic_t refcnt; /* reference counter */
549 struct module *module; /* THIS_MODULE/NULL */
550
551 /* scheduler initializing service */
552 int (*init_service)(struct ip_vs_service *svc);
553 /* scheduling service finish */
554 int (*done_service)(struct ip_vs_service *svc);
555 /* scheduler updating service */
556 int (*update_service)(struct ip_vs_service *svc);
557
558 /* selecting a server from the given service */
559 struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc,
560 const struct sk_buff *skb);
561};
562
85999283
SH		 563/* The persistence engine object */
564struct ip_vs_pe {
565 struct list_head n_list; /* d-linked list head */
566 char *name; /* scheduler name */
567 atomic_t refcnt; /* reference counter */
568 struct module *module; /* THIS_MODULE/NULL */
569
570 /* get the connection template, if any */
571 int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb);
572 bool (*ct_match)(const struct ip_vs_conn_param *p,
573 struct ip_vs_conn *ct);
574 u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval,
575 bool inverse);
a3c918ac 576 int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf);
85999283 577};
1da177e4
LT		 578
579/*
580 * The application module object (a.k.a. app incarnation)
581 */
fd2c3ef7 582struct ip_vs_app {
1da177e4
LT		 583 struct list_head a_list; /* member in app list */
584 int type; /* IP_VS_APP_TYPE_xxx */
585 char *name; /* application module name */
586 __u16 protocol;
587 struct module *module; /* THIS_MODULE/NULL */
588 struct list_head incs_list; /* list of incarnations */
589
590 /* members for application incarnations */
591 struct list_head p_list; /* member in proto app list */
592 struct ip_vs_app *app; /* its real application */
014d730d 593 __be16 port; /* port number in net order */
1da177e4
LT		 594 atomic_t usecnt; /* usage counter */
595
596 /* output hook: return false if can't linearize. diff set for TCP. */
597 int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *,
3db05fea 598 struct sk_buff *, int *diff);
1da177e4
LT		 599
600 /* input hook: return false if can't linearize. diff set for TCP. */
601 int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *,
3db05fea 602 struct sk_buff *, int *diff);
1da177e4
LT		 603
604 /* ip_vs_app initializer */
605 int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *);
606
607 /* ip_vs_app finish */
608 int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *);
609
610
611 /* not used now */
612 int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *,
613 struct ip_vs_protocol *);
614
615 void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *);
616
617 int * timeout_table;
618 int * timeouts;
619 int timeouts_size;
620
621 int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app,
622 int *verdict, struct ip_vs_conn **cpp);
623
624 struct ip_vs_conn *
625 (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app,
626 const struct iphdr *iph, unsigned int proto_off,
627 int inverse);
628
629 struct ip_vs_conn *
630 (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app,
631 const struct iphdr *iph, unsigned int proto_off,
632 int inverse);
633
634 int (*state_transition)(struct ip_vs_conn *cp, int direction,
635 const struct sk_buff *skb,
636 struct ip_vs_app *app);
637
638 void (*timeout_change)(struct ip_vs_app *app, int flags);
639};
640
641
642/*
643 * IPVS core functions
644 * (from ip_vs_core.c)
645 */
646extern const char *ip_vs_proto_name(unsigned proto);
647extern void ip_vs_init_hash_table(struct list_head *table, int rows);
afdd6140 648#define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t)))
1da177e4 649
1da177e4
LT		 650#define IP_VS_APP_TYPE_FTP 1
651
652/*
653 * ip_vs_conn handling functions
654 * (from ip_vs_conn.c)
655 */
656
1da177e4
LT		 657enum {
658 IP_VS_DIR_INPUT = 0,
659 IP_VS_DIR_OUTPUT,
660 IP_VS_DIR_INPUT_ONLY,
661 IP_VS_DIR_LAST,
662};
663
f11017ec
SH		 664static inline void ip_vs_conn_fill_param(int af, int protocol,
665 const union nf_inet_addr *caddr,
666 __be16 cport,
667 const union nf_inet_addr *vaddr,
668 __be16 vport,
669 struct ip_vs_conn_param *p)
670{
671 p->af = af;
672 p->protocol = protocol;
673 p->caddr = caddr;
674 p->cport = cport;
675 p->vaddr = vaddr;
676 p->vport = vport;
85999283
SH		 677 p->pe = NULL;
678 p->pe_data = NULL;
f11017ec 679}
28364a59 680
f11017ec
SH		 681struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p);
682struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p);
28364a59 683
5c0d2374
SH		 684struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb,
685 struct ip_vs_protocol *pp,
686 const struct ip_vs_iphdr *iph,
687 unsigned int proto_off,
688 int inverse);
689
f11017ec 690struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p);
1da177e4 691
5c0d2374
SH		 692struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb,
693 struct ip_vs_protocol *pp,
694 const struct ip_vs_iphdr *iph,
695 unsigned int proto_off,
696 int inverse);
697
1da177e4
LT		 698/* put back the conn without restarting its timer */
699static inline void __ip_vs_conn_put(struct ip_vs_conn *cp)
700{
701 atomic_dec(&cp->refcnt);
702}
703extern void ip_vs_conn_put(struct ip_vs_conn *cp);
014d730d 704extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport);
1da177e4 705
f11017ec
SH		 706struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p,
707 const union nf_inet_addr *daddr,
708 __be16 dport, unsigned flags,
709 struct ip_vs_dest *dest);
1da177e4
LT		 710extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp);
711
712extern const char * ip_vs_state_name(__u16 proto, int state);
713
714extern void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp);
715extern int ip_vs_check_template(struct ip_vs_conn *ct);
1da177e4
LT		 716extern void ip_vs_random_dropentry(void);
717extern int ip_vs_conn_init(void);
718extern void ip_vs_conn_cleanup(void);
719
720static inline void ip_vs_control_del(struct ip_vs_conn *cp)
721{
722 struct ip_vs_conn *ctl_cp = cp->control;
723 if (!ctl_cp) {
cfc78c5a
JV		 724 IP_VS_ERR_BUF("request control DEL for uncontrolled: "
725 "%s:%d to %s:%d\n",
726 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
727 ntohs(cp->cport),
728 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
729 ntohs(cp->vport));
730
1da177e4
LT		 731 return;
732 }
733
cfc78c5a
JV		 734 IP_VS_DBG_BUF(7, "DELeting control for: "
735 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
736 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
737 ntohs(cp->cport),
738 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
739 ntohs(ctl_cp->cport));
1da177e4
LT		 740
741 cp->control = NULL;
742 if (atomic_read(&ctl_cp->n_control) == 0) {
cfc78c5a
JV		 743 IP_VS_ERR_BUF("BUG control DEL with n=0 : "
744 "%s:%d to %s:%d\n",
745 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
746 ntohs(cp->cport),
747 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
748 ntohs(cp->vport));
749
1da177e4
LT		 750 return;
751 }
752 atomic_dec(&ctl_cp->n_control);
753}
754
755static inline void
756ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp)
757{
758 if (cp->control) {
cfc78c5a
JV		 759 IP_VS_ERR_BUF("request control ADD for already controlled: "
760 "%s:%d to %s:%d\n",
761 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
762 ntohs(cp->cport),
763 IP_VS_DBG_ADDR(cp->af, &cp->vaddr),
764 ntohs(cp->vport));
765
1da177e4
LT		 766 ip_vs_control_del(cp);
767 }
768
cfc78c5a
JV		 769 IP_VS_DBG_BUF(7, "ADDing control for: "
770 "cp.dst=%s:%d ctl_cp.dst=%s:%d\n",
771 IP_VS_DBG_ADDR(cp->af, &cp->caddr),
772 ntohs(cp->cport),
773 IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr),
774 ntohs(ctl_cp->cport));
1da177e4
LT		 775
776 cp->control = ctl_cp;
777 atomic_inc(&ctl_cp->n_control);
778}
779
780
781/*
782 * IPVS application functions
783 * (from ip_vs_app.c)
784 */
785#define IP_VS_APP_MAX_PORTS 8
786extern int register_ip_vs_app(struct ip_vs_app *app);
787extern void unregister_ip_vs_app(struct ip_vs_app *app);
788extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
789extern void ip_vs_unbind_app(struct ip_vs_conn *cp);
790extern int
791register_ip_vs_app_inc(struct ip_vs_app *app, __u16 proto, __u16 port);
792extern int ip_vs_app_inc_get(struct ip_vs_app *inc);
793extern void ip_vs_app_inc_put(struct ip_vs_app *inc);
794
3db05fea
HX		 795extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb);
796extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb);
1da177e4
LT		 797extern int ip_vs_app_init(void);
798extern void ip_vs_app_cleanup(void);
799
8be67a66
SH		 800void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe);
801void ip_vs_unbind_pe(struct ip_vs_service *svc);
802int register_ip_vs_pe(struct ip_vs_pe *pe);
803int unregister_ip_vs_pe(struct ip_vs_pe *pe);
804extern struct ip_vs_pe *ip_vs_pe_get(const char *name);
805extern void ip_vs_pe_put(struct ip_vs_pe *pe);
1da177e4
LT		 806
807/*
808 * IPVS protocol functions (from ip_vs_proto.c)
809 */
810extern int ip_vs_protocol_init(void);
811extern void ip_vs_protocol_cleanup(void);
812extern void ip_vs_protocol_timeout_change(int flags);
813extern int *ip_vs_create_timeout_table(int *table, int size);
814extern int
36cbd3dc
JE		 815ip_vs_set_state_timeout(int *table, int num, const char *const *names,
816 const char *name, int to);
1da177e4
LT		 817extern void
818ip_vs_tcpudp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
819 int offset, const char *msg);
820
821extern struct ip_vs_protocol ip_vs_protocol_tcp;
822extern struct ip_vs_protocol ip_vs_protocol_udp;
823extern struct ip_vs_protocol ip_vs_protocol_icmp;
824extern struct ip_vs_protocol ip_vs_protocol_esp;
825extern struct ip_vs_protocol ip_vs_protocol_ah;
2906f66a 826extern struct ip_vs_protocol ip_vs_protocol_sctp;
1da177e4
LT		 827
828/*
829 * Registering/unregistering scheduler functions
830 * (from ip_vs_sched.c)
831 */
832extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
833extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler);
834extern int ip_vs_bind_scheduler(struct ip_vs_service *svc,
835 struct ip_vs_scheduler *scheduler);
836extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc);
837extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name);
838extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler);
839extern struct ip_vs_conn *
85999283 840ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb);
1da177e4
LT		 841extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb,
842 struct ip_vs_protocol *pp);
843
844
845/*
846 * IPVS control data and functions (from ip_vs_ctl.c)
847 */
848extern int sysctl_ip_vs_cache_bypass;
849extern int sysctl_ip_vs_expire_nodest_conn;
850extern int sysctl_ip_vs_expire_quiescent_template;
851extern int sysctl_ip_vs_sync_threshold[2];
852extern int sysctl_ip_vs_nat_icmp_send;
f4bc17cd 853extern int sysctl_ip_vs_conntrack;
8a803040 854extern int sysctl_ip_vs_snat_reroute;
1da177e4 855extern struct ip_vs_stats ip_vs_stats;
5587da55 856extern const struct ctl_path net_vs_ctl_path[];
1da177e4
LT		 857
858extern struct ip_vs_service *
3c2e0505
JV		 859ip_vs_service_get(int af, __u32 fwmark, __u16 protocol,
860 const union nf_inet_addr *vaddr, __be16 vport);
1da177e4
LT		 861
862static inline void ip_vs_service_put(struct ip_vs_service *svc)
863{
864 atomic_dec(&svc->usecnt);
865}
866
867extern struct ip_vs_dest *
7937df15
JV		 868ip_vs_lookup_real_service(int af, __u16 protocol,
869 const union nf_inet_addr *daddr, __be16 dport);
870
1da177e4
LT		 871extern int ip_vs_use_count_inc(void);
872extern void ip_vs_use_count_dec(void);
873extern int ip_vs_control_init(void);
874extern void ip_vs_control_cleanup(void);
1e356f9c 875extern struct ip_vs_dest *
7937df15
JV		 876ip_vs_find_dest(int af, const union nf_inet_addr *daddr, __be16 dport,
877 const union nf_inet_addr *vaddr, __be16 vport, __u16 protocol);
1e356f9c 878extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp);
1da177e4
LT		 879
880
881/*
882 * IPVS sync daemon data and function prototypes
883 * (from ip_vs_sync.c)
884 */
885extern volatile int ip_vs_sync_state;
886extern volatile int ip_vs_master_syncid;
887extern volatile int ip_vs_backup_syncid;
888extern char ip_vs_master_mcast_ifn[IP_VS_IFNAME_MAXLEN];
889extern char ip_vs_backup_mcast_ifn[IP_VS_IFNAME_MAXLEN];
890extern int start_sync_thread(int state, char *mcast_ifn, __u8 syncid);
891extern int stop_sync_thread(int state);
892extern void ip_vs_sync_conn(struct ip_vs_conn *cp);
893
894
895/*
896 * IPVS rate estimator prototypes (from ip_vs_est.c)
897 */
a919cf4b
SW		 898extern int ip_vs_estimator_init(void);
899extern void ip_vs_estimator_cleanup(void);
3a14a313 900extern void ip_vs_new_estimator(struct ip_vs_stats *stats);
1da177e4
LT		 901extern void ip_vs_kill_estimator(struct ip_vs_stats *stats);
902extern void ip_vs_zero_estimator(struct ip_vs_stats *stats);
903
904/*
905 * Various IPVS packet transmitters (from ip_vs_xmit.c)
906 */
907extern int ip_vs_null_xmit
908(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
909extern int ip_vs_bypass_xmit
910(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
911extern int ip_vs_nat_xmit
912(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
913extern int ip_vs_tunnel_xmit
914(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
915extern int ip_vs_dr_xmit
916(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
917extern int ip_vs_icmp_xmit
918(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, int offset);
919extern void ip_vs_dst_reset(struct ip_vs_dest *dest);
920
b3cdd2a7
JV		 921#ifdef CONFIG_IP_VS_IPV6
922extern int ip_vs_bypass_xmit_v6
923(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
924extern int ip_vs_nat_xmit_v6
925(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
926extern int ip_vs_tunnel_xmit_v6
927(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
928extern int ip_vs_dr_xmit_v6
929(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp);
930extern int ip_vs_icmp_xmit_v6
931(struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp,
932 int offset);
933#endif
1da177e4
LT		 934
935/*
936 * This is a simple mechanism to ignore packets when
937 * we are loaded. Just set ip_vs_drop_rate to 'n' and
938 * we start to drop 1/rate of the packets
939 */
940extern int ip_vs_drop_rate;
941extern int ip_vs_drop_counter;
942
943static __inline__ int ip_vs_todrop(void)
944{
945 if (!ip_vs_drop_rate) return 0;
946 if (--ip_vs_drop_counter > 0) return 0;
947 ip_vs_drop_counter = ip_vs_drop_rate;
948 return 1;
949}
950
951/*
952 * ip_vs_fwd_tag returns the forwarding tag of the connection
953 */
954#define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK)
955
732db659 956static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp)
1da177e4
LT		 957{
958 char fwd;
959
960 switch (IP_VS_FWD_METHOD(cp)) {
961 case IP_VS_CONN_F_MASQ:
962 fwd = 'M'; break;
963 case IP_VS_CONN_F_LOCALNODE:
964 fwd = 'L'; break;
965 case IP_VS_CONN_F_TUNNEL:
966 fwd = 'T'; break;
967 case IP_VS_CONN_F_DROUTE:
968 fwd = 'R'; break;
969 case IP_VS_CONN_F_BYPASS:
970 fwd = 'B'; break;
971 default:
972 fwd = '?'; break;
973 }
974 return fwd;
975}
976
1da177e4 977extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp,
b3cdd2a7
JV		 978 struct ip_vs_conn *cp, int dir);
979
980#ifdef CONFIG_IP_VS_IPV6
981extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp,
982 struct ip_vs_conn *cp, int dir);
983#endif
1da177e4 984
b1550f22 985extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset);
1da177e4 986
f9214b26 987static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum)
1da177e4 988{
f9214b26 989 __be32 diff[2] = { ~old, new };
1da177e4 990
07f0757a 991 return csum_partial(diff, sizeof(diff), oldsum);
f9214b26
AV		 992}
993
0bbdd42b
JV		 994#ifdef CONFIG_IP_VS_IPV6
995static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new,
996 __wsum oldsum)
997{
998 __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0],
999 new[3], new[2], new[1], new[0] };
1000
07f0757a 1001 return csum_partial(diff, sizeof(diff), oldsum);
0bbdd42b
JV		 1002}
1003#endif
1004
f9214b26
AV		 1005static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum)
1006{
1007 __be16 diff[2] = { ~old, new };
1008
07f0757a 1009 return csum_partial(diff, sizeof(diff), oldsum);
1da177e4
LT		 1010}
1011
f4bc17cd
JA		 1012#ifdef CONFIG_IP_VS_NFCT
1013/*
1014 * Netfilter connection tracking
1015 * (from ip_vs_nfct.c)
1016 */
1017static inline int ip_vs_conntrack_enabled(void)
1018{
1019 return sysctl_ip_vs_conntrack;
1020}
1021
6523ce15
JA		 1022extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp,
1023 int outin);
f4bc17cd
JA		 1024extern int ip_vs_confirm_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp);
1025extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct,
1026 struct ip_vs_conn *cp, u_int8_t proto,
1027 const __be16 port, int from_rs);
1028extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp);
1029
1030#else
1031
1032static inline int ip_vs_conntrack_enabled(void)
1033{
1034 return 0;
1035}
1036
1037static inline void ip_vs_update_conntrack(struct sk_buff *skb,
1038 struct ip_vs_conn *cp, int outin)
1039{
1040}
1041
1042static inline int ip_vs_confirm_conntrack(struct sk_buff *skb,
1043 struct ip_vs_conn *cp)
1044{
1045 return NF_ACCEPT;
1046}
1047
1048static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp)
1049{
1050}
1051/* CONFIG_IP_VS_NFCT */
1052#endif
6523ce15 1053
1da177e4
LT		 1054#endif /* __KERNEL__ */
1055
bc4768eb 1056#endif /* _NET_IP_VS_H */
kernel source for telekom puls (alcatel/mediatek)