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Commit | Line | Data |
---|---|---|
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 */ | |
cf356d69 | 28 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
f4bc17cd JA |
29 | #include <net/netfilter/nf_conntrack.h> |
30 | #endif | |
61b1ab45 HS |
31 | #include <net/net_namespace.h> /* Netw namespace */ |
32 | ||
33 | /* | |
34 | * Generic access of ipvs struct | |
35 | */ | |
36 | static inline struct netns_ipvs *net_ipvs(struct net* net) | |
37 | { | |
38 | return net->ipvs; | |
39 | } | |
fc723250 HS |
40 | /* |
41 | * Get net ptr from skb in traffic cases | |
42 | * use skb_sknet when call is from userland (ioctl or netlink) | |
43 | */ | |
44 | static inline struct net *skb_net(struct sk_buff *skb) | |
45 | { | |
46 | #ifdef CONFIG_NET_NS | |
47 | #ifdef CONFIG_IP_VS_DEBUG | |
48 | /* | |
49 | * This is used for debug only. | |
50 | * Start with the most likely hit | |
51 | * End with BUG | |
52 | */ | |
53 | if (likely(skb->dev && skb->dev->nd_net)) | |
54 | return dev_net(skb->dev); | |
55 | if (skb_dst(skb)->dev) | |
56 | return dev_net(skb_dst(skb)->dev); | |
57 | WARN(skb->sk, "Maybe skb_sknet should be used in %s() at line:%d\n", | |
58 | __func__, __LINE__); | |
59 | if (likely(skb->sk && skb->sk->sk_net)) | |
60 | return sock_net(skb->sk); | |
61 | pr_err("There is no net ptr to find in the skb in %s() line:%d\n", | |
62 | __func__, __LINE__); | |
63 | BUG(); | |
64 | #else | |
65 | return dev_net(skb->dev ? : skb_dst(skb)->dev); | |
66 | #endif | |
67 | #else | |
68 | return &init_net; | |
69 | #endif | |
70 | } | |
71 | ||
72 | static inline struct net *skb_sknet(struct sk_buff *skb) | |
73 | { | |
74 | #ifdef CONFIG_NET_NS | |
75 | #ifdef CONFIG_IP_VS_DEBUG | |
76 | /* Start with the most likely hit */ | |
77 | if (likely(skb->sk && skb->sk->sk_net)) | |
78 | return sock_net(skb->sk); | |
79 | WARN(skb->dev, "Maybe skb_net should be used instead in %s() line:%d\n", | |
80 | __func__, __LINE__); | |
81 | if (likely(skb->dev && skb->dev->nd_net)) | |
82 | return dev_net(skb->dev); | |
83 | pr_err("There is no net ptr to find in the skb in %s() line:%d\n", | |
84 | __func__, __LINE__); | |
85 | BUG(); | |
86 | #else | |
87 | return sock_net(skb->sk); | |
88 | #endif | |
89 | #else | |
90 | return &init_net; | |
91 | #endif | |
92 | } | |
6f7edb48 CB |
93 | |
94 | /* Connections' size value needed by ip_vs_ctl.c */ | |
95 | extern int ip_vs_conn_tab_size; | |
96 | ||
97 | ||
64aae3cb JV |
98 | struct ip_vs_iphdr { |
99 | int len; | |
100 | __u8 protocol; | |
101 | union nf_inet_addr saddr; | |
102 | union nf_inet_addr daddr; | |
103 | }; | |
104 | ||
105 | static inline void | |
106 | ip_vs_fill_iphdr(int af, const void *nh, struct ip_vs_iphdr *iphdr) | |
107 | { | |
108 | #ifdef CONFIG_IP_VS_IPV6 | |
109 | if (af == AF_INET6) { | |
110 | const struct ipv6hdr *iph = nh; | |
111 | iphdr->len = sizeof(struct ipv6hdr); | |
112 | iphdr->protocol = iph->nexthdr; | |
113 | ipv6_addr_copy(&iphdr->saddr.in6, &iph->saddr); | |
114 | ipv6_addr_copy(&iphdr->daddr.in6, &iph->daddr); | |
115 | } else | |
116 | #endif | |
117 | { | |
118 | const struct iphdr *iph = nh; | |
119 | iphdr->len = iph->ihl * 4; | |
120 | iphdr->protocol = iph->protocol; | |
121 | iphdr->saddr.ip = iph->saddr; | |
122 | iphdr->daddr.ip = iph->daddr; | |
123 | } | |
124 | } | |
125 | ||
126 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, | |
127 | const union nf_inet_addr *src) | |
128 | { | |
129 | #ifdef CONFIG_IP_VS_IPV6 | |
130 | if (af == AF_INET6) | |
131 | ipv6_addr_copy(&dst->in6, &src->in6); | |
132 | else | |
133 | #endif | |
134 | dst->ip = src->ip; | |
135 | } | |
136 | ||
137 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, | |
138 | const union nf_inet_addr *b) | |
139 | { | |
140 | #ifdef CONFIG_IP_VS_IPV6 | |
141 | if (af == AF_INET6) | |
142 | return ipv6_addr_equal(&a->in6, &b->in6); | |
143 | #endif | |
144 | return a->ip == b->ip; | |
145 | } | |
146 | ||
1da177e4 | 147 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
148 | #include <linux/net.h> |
149 | ||
1da177e4 | 150 | extern int ip_vs_get_debug_level(void); |
c842a3ad JV |
151 | |
152 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
153 | const union nf_inet_addr *addr, | |
154 | int *idx) | |
155 | { | |
156 | int len; | |
157 | #ifdef CONFIG_IP_VS_IPV6 | |
158 | if (af == AF_INET6) | |
5b095d98 | 159 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6]", |
0c6ce78a | 160 | &addr->in6) + 1; |
c842a3ad JV |
161 | else |
162 | #endif | |
3685f25d HH |
163 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
164 | &addr->ip) + 1; | |
c842a3ad JV |
165 | |
166 | *idx += len; | |
167 | BUG_ON(*idx > buf_len + 1); | |
168 | return &buf[*idx - len]; | |
169 | } | |
170 | ||
9aada7ac HE |
171 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
172 | do { \ | |
173 | char ip_vs_dbg_buf[160]; \ | |
174 | int ip_vs_dbg_idx = 0; \ | |
175 | if (level <= ip_vs_get_debug_level()) \ | |
176 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
177 | } while (0) | |
178 | #define IP_VS_ERR_BUF(msg...) \ | |
179 | do { \ | |
180 | char ip_vs_dbg_buf[160]; \ | |
181 | int ip_vs_dbg_idx = 0; \ | |
182 | pr_err(msg); \ | |
183 | } while (0) | |
c842a3ad JV |
184 | |
185 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
186 | #define IP_VS_DBG_ADDR(af, addr) \ |
187 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
188 | sizeof(ip_vs_dbg_buf), addr, \ | |
189 | &ip_vs_dbg_idx) | |
190 | ||
191 | #define IP_VS_DBG(level, msg, ...) \ | |
192 | do { \ | |
193 | if (level <= ip_vs_get_debug_level()) \ | |
194 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
195 | } while (0) | |
196 | #define IP_VS_DBG_RL(msg, ...) \ | |
197 | do { \ | |
198 | if (net_ratelimit()) \ | |
199 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
200 | } while (0) | |
0d79641a | 201 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
202 | do { \ |
203 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 204 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 205 | } while (0) |
0d79641a | 206 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
207 | do { \ |
208 | if (level <= ip_vs_get_debug_level() && \ | |
209 | net_ratelimit()) \ | |
0d79641a | 210 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 211 | } while (0) |
1da177e4 | 212 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
213 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
214 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
215 | #define IP_VS_DBG(level, msg...) do {} while (0) |
216 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
217 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
218 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
219 | #endif |
220 | ||
221 | #define IP_VS_BUG() BUG() | |
1e3e238e | 222 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
223 | do { \ |
224 | if (net_ratelimit()) \ | |
1e3e238e | 225 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 226 | } while (0) |
1da177e4 LT |
227 | |
228 | #ifdef CONFIG_IP_VS_DEBUG | |
229 | #define EnterFunction(level) \ | |
9aada7ac HE |
230 | do { \ |
231 | if (level <= ip_vs_get_debug_level()) \ | |
232 | printk(KERN_DEBUG \ | |
233 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
234 | __func__, __FILE__, __LINE__); \ | |
235 | } while (0) | |
236 | #define LeaveFunction(level) \ | |
237 | do { \ | |
238 | if (level <= ip_vs_get_debug_level()) \ | |
239 | printk(KERN_DEBUG \ | |
240 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
241 | __func__, __FILE__, __LINE__); \ | |
242 | } while (0) | |
1da177e4 LT |
243 | #else |
244 | #define EnterFunction(level) do {} while (0) | |
245 | #define LeaveFunction(level) do {} while (0) | |
246 | #endif | |
247 | ||
248 | #define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); } | |
249 | ||
250 | ||
251 | /* | |
252 | * The port number of FTP service (in network order). | |
253 | */ | |
f3a7c66b HH |
254 | #define FTPPORT cpu_to_be16(21) |
255 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 256 | |
1da177e4 LT |
257 | /* |
258 | * TCP State Values | |
259 | */ | |
260 | enum { | |
261 | IP_VS_TCP_S_NONE = 0, | |
262 | IP_VS_TCP_S_ESTABLISHED, | |
263 | IP_VS_TCP_S_SYN_SENT, | |
264 | IP_VS_TCP_S_SYN_RECV, | |
265 | IP_VS_TCP_S_FIN_WAIT, | |
266 | IP_VS_TCP_S_TIME_WAIT, | |
267 | IP_VS_TCP_S_CLOSE, | |
268 | IP_VS_TCP_S_CLOSE_WAIT, | |
269 | IP_VS_TCP_S_LAST_ACK, | |
270 | IP_VS_TCP_S_LISTEN, | |
271 | IP_VS_TCP_S_SYNACK, | |
272 | IP_VS_TCP_S_LAST | |
273 | }; | |
274 | ||
275 | /* | |
276 | * UDP State Values | |
277 | */ | |
278 | enum { | |
279 | IP_VS_UDP_S_NORMAL, | |
280 | IP_VS_UDP_S_LAST, | |
281 | }; | |
282 | ||
283 | /* | |
284 | * ICMP State Values | |
285 | */ | |
286 | enum { | |
287 | IP_VS_ICMP_S_NORMAL, | |
288 | IP_VS_ICMP_S_LAST, | |
289 | }; | |
290 | ||
2906f66a VMR |
291 | /* |
292 | * SCTP State Values | |
293 | */ | |
294 | enum ip_vs_sctp_states { | |
295 | IP_VS_SCTP_S_NONE, | |
296 | IP_VS_SCTP_S_INIT_CLI, | |
297 | IP_VS_SCTP_S_INIT_SER, | |
298 | IP_VS_SCTP_S_INIT_ACK_CLI, | |
299 | IP_VS_SCTP_S_INIT_ACK_SER, | |
300 | IP_VS_SCTP_S_ECHO_CLI, | |
301 | IP_VS_SCTP_S_ECHO_SER, | |
302 | IP_VS_SCTP_S_ESTABLISHED, | |
303 | IP_VS_SCTP_S_SHUT_CLI, | |
304 | IP_VS_SCTP_S_SHUT_SER, | |
305 | IP_VS_SCTP_S_SHUT_ACK_CLI, | |
306 | IP_VS_SCTP_S_SHUT_ACK_SER, | |
307 | IP_VS_SCTP_S_CLOSED, | |
308 | IP_VS_SCTP_S_LAST | |
309 | }; | |
310 | ||
1da177e4 LT |
311 | /* |
312 | * Delta sequence info structure | |
313 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
314 | * Only used in the VS/NAT. | |
315 | */ | |
316 | struct ip_vs_seq { | |
317 | __u32 init_seq; /* Add delta from this seq */ | |
318 | __u32 delta; /* Delta in sequence numbers */ | |
319 | __u32 previous_delta; /* Delta in sequence numbers | |
320 | before last resized pkt */ | |
321 | }; | |
322 | ||
323 | ||
324 | /* | |
3a14a313 | 325 | * IPVS statistics objects |
1da177e4 | 326 | */ |
3a14a313 SW |
327 | struct ip_vs_estimator { |
328 | struct list_head list; | |
329 | ||
330 | u64 last_inbytes; | |
331 | u64 last_outbytes; | |
332 | u32 last_conns; | |
333 | u32 last_inpkts; | |
334 | u32 last_outpkts; | |
335 | ||
336 | u32 cps; | |
337 | u32 inpps; | |
338 | u32 outpps; | |
339 | u32 inbps; | |
340 | u32 outbps; | |
341 | }; | |
342 | ||
fd2c3ef7 | 343 | struct ip_vs_stats { |
e9c0ce23 SW |
344 | struct ip_vs_stats_user ustats; /* statistics */ |
345 | struct ip_vs_estimator est; /* estimator */ | |
3a14a313 | 346 | |
1da177e4 LT |
347 | spinlock_t lock; /* spin lock */ |
348 | }; | |
349 | ||
14c85021 ACM |
350 | struct dst_entry; |
351 | struct iphdr; | |
1da177e4 LT |
352 | struct ip_vs_conn; |
353 | struct ip_vs_app; | |
14c85021 | 354 | struct sk_buff; |
1da177e4 LT |
355 | |
356 | struct ip_vs_protocol { | |
357 | struct ip_vs_protocol *next; | |
358 | char *name; | |
2ad17def JA |
359 | u16 protocol; |
360 | u16 num_states; | |
1da177e4 LT |
361 | int dont_defrag; |
362 | atomic_t appcnt; /* counter of proto app incs */ | |
363 | int *timeout_table; /* protocol timeout table */ | |
364 | ||
365 | void (*init)(struct ip_vs_protocol *pp); | |
366 | ||
367 | void (*exit)(struct ip_vs_protocol *pp); | |
368 | ||
51ef348b | 369 | int (*conn_schedule)(int af, struct sk_buff *skb, |
1da177e4 LT |
370 | struct ip_vs_protocol *pp, |
371 | int *verdict, struct ip_vs_conn **cpp); | |
372 | ||
373 | struct ip_vs_conn * | |
51ef348b JV |
374 | (*conn_in_get)(int af, |
375 | const struct sk_buff *skb, | |
1da177e4 | 376 | struct ip_vs_protocol *pp, |
51ef348b | 377 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
378 | unsigned int proto_off, |
379 | int inverse); | |
380 | ||
381 | struct ip_vs_conn * | |
51ef348b JV |
382 | (*conn_out_get)(int af, |
383 | const struct sk_buff *skb, | |
1da177e4 | 384 | struct ip_vs_protocol *pp, |
51ef348b | 385 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
386 | unsigned int proto_off, |
387 | int inverse); | |
388 | ||
3db05fea | 389 | int (*snat_handler)(struct sk_buff *skb, |
1da177e4 LT |
390 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
391 | ||
3db05fea | 392 | int (*dnat_handler)(struct sk_buff *skb, |
1da177e4 LT |
393 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
394 | ||
51ef348b JV |
395 | int (*csum_check)(int af, struct sk_buff *skb, |
396 | struct ip_vs_protocol *pp); | |
1da177e4 LT |
397 | |
398 | const char *(*state_name)(int state); | |
399 | ||
400 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
401 | const struct sk_buff *skb, | |
402 | struct ip_vs_protocol *pp); | |
403 | ||
404 | int (*register_app)(struct ip_vs_app *inc); | |
405 | ||
406 | void (*unregister_app)(struct ip_vs_app *inc); | |
407 | ||
408 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
409 | ||
0d79641a | 410 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
411 | const struct sk_buff *skb, |
412 | int offset, | |
413 | const char *msg); | |
414 | ||
415 | void (*timeout_change)(struct ip_vs_protocol *pp, int flags); | |
416 | ||
417 | int (*set_state_timeout)(struct ip_vs_protocol *pp, char *sname, int to); | |
418 | }; | |
419 | ||
420 | extern struct ip_vs_protocol * ip_vs_proto_get(unsigned short proto); | |
421 | ||
f11017ec SH |
422 | struct ip_vs_conn_param { |
423 | const union nf_inet_addr *caddr; | |
424 | const union nf_inet_addr *vaddr; | |
425 | __be16 cport; | |
426 | __be16 vport; | |
427 | __u16 protocol; | |
428 | u16 af; | |
85999283 SH |
429 | |
430 | const struct ip_vs_pe *pe; | |
431 | char *pe_data; | |
432 | __u8 pe_data_len; | |
f11017ec SH |
433 | }; |
434 | ||
1da177e4 LT |
435 | /* |
436 | * IP_VS structure allocated for each dynamically scheduled connection | |
437 | */ | |
438 | struct ip_vs_conn { | |
439 | struct list_head c_list; /* hashed list heads */ | |
440 | ||
441 | /* Protocol, addresses and port numbers */ | |
e7ade46a JV |
442 | u16 af; /* address family */ |
443 | union nf_inet_addr caddr; /* client address */ | |
444 | union nf_inet_addr vaddr; /* virtual address */ | |
445 | union nf_inet_addr daddr; /* destination address */ | |
3575792e | 446 | volatile __u32 flags; /* status flags */ |
0e051e68 | 447 | __u32 fwmark; /* Fire wall mark from skb */ |
014d730d AV |
448 | __be16 cport; |
449 | __be16 vport; | |
450 | __be16 dport; | |
1da177e4 LT |
451 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
452 | ||
453 | /* counter and timer */ | |
454 | atomic_t refcnt; /* reference count */ | |
455 | struct timer_list timer; /* Expiration timer */ | |
456 | volatile unsigned long timeout; /* timeout */ | |
457 | ||
458 | /* Flags and state transition */ | |
459 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 460 | volatile __u16 state; /* state info */ |
efac5276 RB |
461 | volatile __u16 old_state; /* old state, to be used for |
462 | * state transition triggerd | |
463 | * synchronization | |
464 | */ | |
1da177e4 LT |
465 | |
466 | /* Control members */ | |
467 | struct ip_vs_conn *control; /* Master control connection */ | |
468 | atomic_t n_control; /* Number of controlled ones */ | |
469 | struct ip_vs_dest *dest; /* real server */ | |
470 | atomic_t in_pkts; /* incoming packet counter */ | |
471 | ||
472 | /* packet transmitter for different forwarding methods. If it | |
473 | mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
474 | otherwise this must be changed to a sk_buff **. | |
fc604767 | 475 | NF_ACCEPT can be returned when destination is local. |
1da177e4 LT |
476 | */ |
477 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
478 | struct ip_vs_protocol *pp); | |
479 | ||
480 | /* Note: we can group the following members into a structure, | |
481 | in order to save more space, and the following members are | |
482 | only used in VS/NAT anyway */ | |
483 | struct ip_vs_app *app; /* bound ip_vs_app object */ | |
484 | void *app_data; /* Application private data */ | |
485 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
486 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
85999283 | 487 | |
e9e5eee8 | 488 | const struct ip_vs_pe *pe; |
85999283 SH |
489 | char *pe_data; |
490 | __u8 pe_data_len; | |
1da177e4 LT |
491 | }; |
492 | ||
493 | ||
c860c6b1 JV |
494 | /* |
495 | * Extended internal versions of struct ip_vs_service_user and | |
496 | * ip_vs_dest_user for IPv6 support. | |
497 | * | |
498 | * We need these to conveniently pass around service and destination | |
499 | * options, but unfortunately, we also need to keep the old definitions to | |
500 | * maintain userspace backwards compatibility for the setsockopt interface. | |
501 | */ | |
502 | struct ip_vs_service_user_kern { | |
503 | /* virtual service addresses */ | |
504 | u16 af; | |
505 | u16 protocol; | |
506 | union nf_inet_addr addr; /* virtual ip address */ | |
507 | u16 port; | |
508 | u32 fwmark; /* firwall mark of service */ | |
509 | ||
510 | /* virtual service options */ | |
511 | char *sched_name; | |
0d1e71b0 | 512 | char *pe_name; |
c860c6b1 JV |
513 | unsigned flags; /* virtual service flags */ |
514 | unsigned timeout; /* persistent timeout in sec */ | |
515 | u32 netmask; /* persistent netmask */ | |
516 | }; | |
517 | ||
518 | ||
519 | struct ip_vs_dest_user_kern { | |
520 | /* destination server address */ | |
521 | union nf_inet_addr addr; | |
522 | u16 port; | |
523 | ||
524 | /* real server options */ | |
525 | unsigned conn_flags; /* connection flags */ | |
526 | int weight; /* destination weight */ | |
527 | ||
528 | /* thresholds for active connections */ | |
529 | u32 u_threshold; /* upper threshold */ | |
530 | u32 l_threshold; /* lower threshold */ | |
531 | }; | |
532 | ||
533 | ||
1da177e4 LT |
534 | /* |
535 | * The information about the virtual service offered to the net | |
536 | * and the forwarding entries | |
537 | */ | |
538 | struct ip_vs_service { | |
539 | struct list_head s_list; /* for normal service table */ | |
540 | struct list_head f_list; /* for fwmark-based service table */ | |
541 | atomic_t refcnt; /* reference counter */ | |
542 | atomic_t usecnt; /* use counter */ | |
543 | ||
e7ade46a | 544 | u16 af; /* address family */ |
1da177e4 | 545 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 546 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 547 | __be16 port; /* port number for the service */ |
1da177e4 LT |
548 | __u32 fwmark; /* firewall mark of the service */ |
549 | unsigned flags; /* service status flags */ | |
550 | unsigned timeout; /* persistent timeout in ticks */ | |
014d730d | 551 | __be32 netmask; /* grouping granularity */ |
fc723250 | 552 | struct net *net; |
1da177e4 LT |
553 | |
554 | struct list_head destinations; /* real server d-linked list */ | |
555 | __u32 num_dests; /* number of servers */ | |
556 | struct ip_vs_stats stats; /* statistics for the service */ | |
557 | struct ip_vs_app *inc; /* bind conns to this app inc */ | |
558 | ||
559 | /* for scheduling */ | |
560 | struct ip_vs_scheduler *scheduler; /* bound scheduler object */ | |
561 | rwlock_t sched_lock; /* lock sched_data */ | |
562 | void *sched_data; /* scheduler application data */ | |
85999283 SH |
563 | |
564 | /* alternate persistence engine */ | |
565 | struct ip_vs_pe *pe; | |
1da177e4 LT |
566 | }; |
567 | ||
568 | ||
569 | /* | |
570 | * The real server destination forwarding entry | |
571 | * with ip address, port number, and so on. | |
572 | */ | |
573 | struct ip_vs_dest { | |
574 | struct list_head n_list; /* for the dests in the service */ | |
575 | struct list_head d_list; /* for table with all the dests */ | |
576 | ||
e7ade46a JV |
577 | u16 af; /* address family */ |
578 | union nf_inet_addr addr; /* IP address of the server */ | |
014d730d | 579 | __be16 port; /* port number of the server */ |
1da177e4 LT |
580 | volatile unsigned flags; /* dest status flags */ |
581 | atomic_t conn_flags; /* flags to copy to conn */ | |
582 | atomic_t weight; /* server weight */ | |
583 | ||
584 | atomic_t refcnt; /* reference counter */ | |
585 | struct ip_vs_stats stats; /* statistics */ | |
586 | ||
587 | /* connection counters and thresholds */ | |
588 | atomic_t activeconns; /* active connections */ | |
589 | atomic_t inactconns; /* inactive connections */ | |
590 | atomic_t persistconns; /* persistent connections */ | |
591 | __u32 u_threshold; /* upper threshold */ | |
592 | __u32 l_threshold; /* lower threshold */ | |
593 | ||
594 | /* for destination cache */ | |
595 | spinlock_t dst_lock; /* lock of dst_cache */ | |
596 | struct dst_entry *dst_cache; /* destination cache entry */ | |
597 | u32 dst_rtos; /* RT_TOS(tos) for dst */ | |
714f095f HS |
598 | u32 dst_cookie; |
599 | #ifdef CONFIG_IP_VS_IPV6 | |
600 | struct in6_addr dst_saddr; | |
601 | #endif | |
1da177e4 LT |
602 | |
603 | /* for virtual service */ | |
604 | struct ip_vs_service *svc; /* service it belongs to */ | |
605 | __u16 protocol; /* which protocol (TCP/UDP) */ | |
e7ade46a | 606 | union nf_inet_addr vaddr; /* virtual IP address */ |
014d730d | 607 | __be16 vport; /* virtual port number */ |
1da177e4 LT |
608 | __u32 vfwmark; /* firewall mark of service */ |
609 | }; | |
610 | ||
611 | ||
612 | /* | |
613 | * The scheduler object | |
614 | */ | |
615 | struct ip_vs_scheduler { | |
616 | struct list_head n_list; /* d-linked list head */ | |
617 | char *name; /* scheduler name */ | |
618 | atomic_t refcnt; /* reference counter */ | |
619 | struct module *module; /* THIS_MODULE/NULL */ | |
620 | ||
621 | /* scheduler initializing service */ | |
622 | int (*init_service)(struct ip_vs_service *svc); | |
623 | /* scheduling service finish */ | |
624 | int (*done_service)(struct ip_vs_service *svc); | |
625 | /* scheduler updating service */ | |
626 | int (*update_service)(struct ip_vs_service *svc); | |
627 | ||
628 | /* selecting a server from the given service */ | |
629 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
630 | const struct sk_buff *skb); | |
631 | }; | |
632 | ||
85999283 SH |
633 | /* The persistence engine object */ |
634 | struct ip_vs_pe { | |
635 | struct list_head n_list; /* d-linked list head */ | |
636 | char *name; /* scheduler name */ | |
637 | atomic_t refcnt; /* reference counter */ | |
638 | struct module *module; /* THIS_MODULE/NULL */ | |
639 | ||
640 | /* get the connection template, if any */ | |
641 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
642 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
643 | struct ip_vs_conn *ct); | |
644 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
645 | bool inverse); | |
a3c918ac | 646 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
85999283 | 647 | }; |
1da177e4 LT |
648 | |
649 | /* | |
650 | * The application module object (a.k.a. app incarnation) | |
651 | */ | |
fd2c3ef7 | 652 | struct ip_vs_app { |
1da177e4 LT |
653 | struct list_head a_list; /* member in app list */ |
654 | int type; /* IP_VS_APP_TYPE_xxx */ | |
655 | char *name; /* application module name */ | |
656 | __u16 protocol; | |
657 | struct module *module; /* THIS_MODULE/NULL */ | |
658 | struct list_head incs_list; /* list of incarnations */ | |
659 | ||
660 | /* members for application incarnations */ | |
661 | struct list_head p_list; /* member in proto app list */ | |
662 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 663 | __be16 port; /* port number in net order */ |
1da177e4 LT |
664 | atomic_t usecnt; /* usage counter */ |
665 | ||
8b27b10f JA |
666 | /* |
667 | * output hook: Process packet in inout direction, diff set for TCP. | |
668 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
669 | * 2=Mangled but checksum was not updated | |
670 | */ | |
1da177e4 | 671 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 672 | struct sk_buff *, int *diff); |
1da177e4 | 673 | |
8b27b10f JA |
674 | /* |
675 | * input hook: Process packet in outin direction, diff set for TCP. | |
676 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
677 | * 2=Mangled but checksum was not updated | |
678 | */ | |
1da177e4 | 679 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 680 | struct sk_buff *, int *diff); |
1da177e4 LT |
681 | |
682 | /* ip_vs_app initializer */ | |
683 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
684 | ||
685 | /* ip_vs_app finish */ | |
686 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
687 | ||
688 | ||
689 | /* not used now */ | |
690 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
691 | struct ip_vs_protocol *); | |
692 | ||
693 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
694 | ||
695 | int * timeout_table; | |
696 | int * timeouts; | |
697 | int timeouts_size; | |
698 | ||
699 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
700 | int *verdict, struct ip_vs_conn **cpp); | |
701 | ||
702 | struct ip_vs_conn * | |
703 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
704 | const struct iphdr *iph, unsigned int proto_off, | |
705 | int inverse); | |
706 | ||
707 | struct ip_vs_conn * | |
708 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
709 | const struct iphdr *iph, unsigned int proto_off, | |
710 | int inverse); | |
711 | ||
712 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
713 | const struct sk_buff *skb, | |
714 | struct ip_vs_app *app); | |
715 | ||
716 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
717 | }; | |
718 | ||
719 | ||
720 | /* | |
721 | * IPVS core functions | |
722 | * (from ip_vs_core.c) | |
723 | */ | |
724 | extern const char *ip_vs_proto_name(unsigned proto); | |
725 | extern void ip_vs_init_hash_table(struct list_head *table, int rows); | |
afdd6140 | 726 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 727 | |
1da177e4 LT |
728 | #define IP_VS_APP_TYPE_FTP 1 |
729 | ||
730 | /* | |
731 | * ip_vs_conn handling functions | |
732 | * (from ip_vs_conn.c) | |
733 | */ | |
734 | ||
1da177e4 LT |
735 | enum { |
736 | IP_VS_DIR_INPUT = 0, | |
737 | IP_VS_DIR_OUTPUT, | |
738 | IP_VS_DIR_INPUT_ONLY, | |
739 | IP_VS_DIR_LAST, | |
740 | }; | |
741 | ||
f11017ec SH |
742 | static inline void ip_vs_conn_fill_param(int af, int protocol, |
743 | const union nf_inet_addr *caddr, | |
744 | __be16 cport, | |
745 | const union nf_inet_addr *vaddr, | |
746 | __be16 vport, | |
747 | struct ip_vs_conn_param *p) | |
748 | { | |
749 | p->af = af; | |
750 | p->protocol = protocol; | |
751 | p->caddr = caddr; | |
752 | p->cport = cport; | |
753 | p->vaddr = vaddr; | |
754 | p->vport = vport; | |
85999283 SH |
755 | p->pe = NULL; |
756 | p->pe_data = NULL; | |
f11017ec | 757 | } |
28364a59 | 758 | |
f11017ec SH |
759 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
760 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 761 | |
5c0d2374 SH |
762 | struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb, |
763 | struct ip_vs_protocol *pp, | |
764 | const struct ip_vs_iphdr *iph, | |
765 | unsigned int proto_off, | |
766 | int inverse); | |
767 | ||
f11017ec | 768 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 769 | |
5c0d2374 SH |
770 | struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb, |
771 | struct ip_vs_protocol *pp, | |
772 | const struct ip_vs_iphdr *iph, | |
773 | unsigned int proto_off, | |
774 | int inverse); | |
775 | ||
1da177e4 LT |
776 | /* put back the conn without restarting its timer */ |
777 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
778 | { | |
779 | atomic_dec(&cp->refcnt); | |
780 | } | |
781 | extern void ip_vs_conn_put(struct ip_vs_conn *cp); | |
014d730d | 782 | extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); |
1da177e4 | 783 | |
f11017ec SH |
784 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, |
785 | const union nf_inet_addr *daddr, | |
786 | __be16 dport, unsigned flags, | |
0e051e68 | 787 | struct ip_vs_dest *dest, __u32 fwmark); |
1da177e4 LT |
788 | extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
789 | ||
790 | extern const char * ip_vs_state_name(__u16 proto, int state); | |
791 | ||
792 | extern void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp); | |
793 | extern int ip_vs_check_template(struct ip_vs_conn *ct); | |
1da177e4 LT |
794 | extern void ip_vs_random_dropentry(void); |
795 | extern int ip_vs_conn_init(void); | |
796 | extern void ip_vs_conn_cleanup(void); | |
797 | ||
798 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
799 | { | |
800 | struct ip_vs_conn *ctl_cp = cp->control; | |
801 | if (!ctl_cp) { | |
cfc78c5a JV |
802 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
803 | "%s:%d to %s:%d\n", | |
804 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
805 | ntohs(cp->cport), | |
806 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
807 | ntohs(cp->vport)); | |
808 | ||
1da177e4 LT |
809 | return; |
810 | } | |
811 | ||
cfc78c5a JV |
812 | IP_VS_DBG_BUF(7, "DELeting control for: " |
813 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
814 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
815 | ntohs(cp->cport), | |
816 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
817 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
818 | |
819 | cp->control = NULL; | |
820 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
821 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
822 | "%s:%d to %s:%d\n", | |
823 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
824 | ntohs(cp->cport), | |
825 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
826 | ntohs(cp->vport)); | |
827 | ||
1da177e4 LT |
828 | return; |
829 | } | |
830 | atomic_dec(&ctl_cp->n_control); | |
831 | } | |
832 | ||
833 | static inline void | |
834 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
835 | { | |
836 | if (cp->control) { | |
cfc78c5a JV |
837 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
838 | "%s:%d to %s:%d\n", | |
839 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
840 | ntohs(cp->cport), | |
841 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
842 | ntohs(cp->vport)); | |
843 | ||
1da177e4 LT |
844 | ip_vs_control_del(cp); |
845 | } | |
846 | ||
cfc78c5a JV |
847 | IP_VS_DBG_BUF(7, "ADDing control for: " |
848 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
849 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
850 | ntohs(cp->cport), | |
851 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
852 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
853 | |
854 | cp->control = ctl_cp; | |
855 | atomic_inc(&ctl_cp->n_control); | |
856 | } | |
857 | ||
858 | ||
859 | /* | |
860 | * IPVS application functions | |
861 | * (from ip_vs_app.c) | |
862 | */ | |
863 | #define IP_VS_APP_MAX_PORTS 8 | |
864 | extern int register_ip_vs_app(struct ip_vs_app *app); | |
865 | extern void unregister_ip_vs_app(struct ip_vs_app *app); | |
866 | extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
867 | extern void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
868 | extern int | |
869 | register_ip_vs_app_inc(struct ip_vs_app *app, __u16 proto, __u16 port); | |
870 | extern int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
871 | extern void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
872 | ||
3db05fea HX |
873 | extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); |
874 | extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
1da177e4 LT |
875 | extern int ip_vs_app_init(void); |
876 | extern void ip_vs_app_cleanup(void); | |
877 | ||
8be67a66 SH |
878 | void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe); |
879 | void ip_vs_unbind_pe(struct ip_vs_service *svc); | |
880 | int register_ip_vs_pe(struct ip_vs_pe *pe); | |
881 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 882 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 883 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 SH |
884 | |
885 | static inline void ip_vs_pe_get(const struct ip_vs_pe *pe) | |
886 | { | |
887 | if (pe && pe->module) | |
888 | __module_get(pe->module); | |
889 | } | |
890 | ||
891 | static inline void ip_vs_pe_put(const struct ip_vs_pe *pe) | |
892 | { | |
893 | if (pe && pe->module) | |
894 | module_put(pe->module); | |
895 | } | |
1da177e4 LT |
896 | |
897 | /* | |
898 | * IPVS protocol functions (from ip_vs_proto.c) | |
899 | */ | |
900 | extern int ip_vs_protocol_init(void); | |
901 | extern void ip_vs_protocol_cleanup(void); | |
902 | extern void ip_vs_protocol_timeout_change(int flags); | |
903 | extern int *ip_vs_create_timeout_table(int *table, int size); | |
904 | extern int | |
36cbd3dc JE |
905 | ip_vs_set_state_timeout(int *table, int num, const char *const *names, |
906 | const char *name, int to); | |
1da177e4 | 907 | extern void |
0d79641a JA |
908 | ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
909 | const struct sk_buff *skb, | |
1da177e4 LT |
910 | int offset, const char *msg); |
911 | ||
912 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
913 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
914 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
915 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
916 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 917 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 LT |
918 | |
919 | /* | |
920 | * Registering/unregistering scheduler functions | |
921 | * (from ip_vs_sched.c) | |
922 | */ | |
923 | extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
924 | extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
925 | extern int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
926 | struct ip_vs_scheduler *scheduler); | |
927 | extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc); | |
928 | extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
929 | extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
930 | extern struct ip_vs_conn * | |
190ecd27 JA |
931 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
932 | struct ip_vs_protocol *pp, int *ignored); | |
1da177e4 LT |
933 | extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
934 | struct ip_vs_protocol *pp); | |
935 | ||
936 | ||
937 | /* | |
938 | * IPVS control data and functions (from ip_vs_ctl.c) | |
939 | */ | |
940 | extern int sysctl_ip_vs_cache_bypass; | |
941 | extern int sysctl_ip_vs_expire_nodest_conn; | |
942 | extern int sysctl_ip_vs_expire_quiescent_template; | |
943 | extern int sysctl_ip_vs_sync_threshold[2]; | |
944 | extern int sysctl_ip_vs_nat_icmp_send; | |
f4bc17cd | 945 | extern int sysctl_ip_vs_conntrack; |
8a803040 | 946 | extern int sysctl_ip_vs_snat_reroute; |
1da177e4 | 947 | extern struct ip_vs_stats ip_vs_stats; |
5587da55 | 948 | extern const struct ctl_path net_vs_ctl_path[]; |
b880c1f0 | 949 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 | 950 | |
b880c1f0 | 951 | extern void ip_vs_sync_switch_mode(int mode); |
1da177e4 | 952 | extern struct ip_vs_service * |
fc723250 | 953 | ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 954 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 LT |
955 | |
956 | static inline void ip_vs_service_put(struct ip_vs_service *svc) | |
957 | { | |
958 | atomic_dec(&svc->usecnt); | |
959 | } | |
960 | ||
961 | extern struct ip_vs_dest * | |
fc723250 | 962 | ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol, |
7937df15 JV |
963 | const union nf_inet_addr *daddr, __be16 dport); |
964 | ||
1da177e4 LT |
965 | extern int ip_vs_use_count_inc(void); |
966 | extern void ip_vs_use_count_dec(void); | |
967 | extern int ip_vs_control_init(void); | |
968 | extern void ip_vs_control_cleanup(void); | |
1e356f9c | 969 | extern struct ip_vs_dest * |
fc723250 HS |
970 | ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr, |
971 | __be16 dport, const union nf_inet_addr *vaddr, __be16 vport, | |
972 | __u16 protocol, __u32 fwmark); | |
1e356f9c | 973 | extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 LT |
974 | |
975 | ||
976 | /* | |
977 | * IPVS sync daemon data and function prototypes | |
978 | * (from ip_vs_sync.c) | |
979 | */ | |
980 | extern volatile int ip_vs_sync_state; | |
981 | extern volatile int ip_vs_master_syncid; | |
982 | extern volatile int ip_vs_backup_syncid; | |
983 | extern char ip_vs_master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
984 | extern char ip_vs_backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
985 | extern int start_sync_thread(int state, char *mcast_ifn, __u8 syncid); | |
986 | extern int stop_sync_thread(int state); | |
986a0757 | 987 | extern void ip_vs_sync_conn(struct ip_vs_conn *cp); |
61b1ab45 HS |
988 | extern int ip_vs_sync_init(void); |
989 | extern void ip_vs_sync_cleanup(void); | |
1da177e4 LT |
990 | |
991 | ||
992 | /* | |
993 | * IPVS rate estimator prototypes (from ip_vs_est.c) | |
994 | */ | |
a919cf4b SW |
995 | extern int ip_vs_estimator_init(void); |
996 | extern void ip_vs_estimator_cleanup(void); | |
3a14a313 | 997 | extern void ip_vs_new_estimator(struct ip_vs_stats *stats); |
1da177e4 LT |
998 | extern void ip_vs_kill_estimator(struct ip_vs_stats *stats); |
999 | extern void ip_vs_zero_estimator(struct ip_vs_stats *stats); | |
1000 | ||
1001 | /* | |
1002 | * Various IPVS packet transmitters (from ip_vs_xmit.c) | |
1003 | */ | |
1004 | extern int ip_vs_null_xmit | |
1005 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1006 | extern int ip_vs_bypass_xmit | |
1007 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1008 | extern int ip_vs_nat_xmit | |
1009 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1010 | extern int ip_vs_tunnel_xmit | |
1011 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1012 | extern int ip_vs_dr_xmit | |
1013 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1014 | extern int ip_vs_icmp_xmit | |
1015 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, int offset); | |
1016 | extern void ip_vs_dst_reset(struct ip_vs_dest *dest); | |
1017 | ||
b3cdd2a7 JV |
1018 | #ifdef CONFIG_IP_VS_IPV6 |
1019 | extern int ip_vs_bypass_xmit_v6 | |
1020 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1021 | extern int ip_vs_nat_xmit_v6 | |
1022 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1023 | extern int ip_vs_tunnel_xmit_v6 | |
1024 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1025 | extern int ip_vs_dr_xmit_v6 | |
1026 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1027 | extern int ip_vs_icmp_xmit_v6 | |
1028 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, | |
1029 | int offset); | |
1030 | #endif | |
1da177e4 LT |
1031 | |
1032 | /* | |
1033 | * This is a simple mechanism to ignore packets when | |
1034 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1035 | * we start to drop 1/rate of the packets | |
1036 | */ | |
1037 | extern int ip_vs_drop_rate; | |
1038 | extern int ip_vs_drop_counter; | |
1039 | ||
1040 | static __inline__ int ip_vs_todrop(void) | |
1041 | { | |
1042 | if (!ip_vs_drop_rate) return 0; | |
1043 | if (--ip_vs_drop_counter > 0) return 0; | |
1044 | ip_vs_drop_counter = ip_vs_drop_rate; | |
1045 | return 1; | |
1046 | } | |
1047 | ||
1048 | /* | |
1049 | * ip_vs_fwd_tag returns the forwarding tag of the connection | |
1050 | */ | |
1051 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) | |
1052 | ||
732db659 | 1053 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1054 | { |
1055 | char fwd; | |
1056 | ||
1057 | switch (IP_VS_FWD_METHOD(cp)) { | |
1058 | case IP_VS_CONN_F_MASQ: | |
1059 | fwd = 'M'; break; | |
1060 | case IP_VS_CONN_F_LOCALNODE: | |
1061 | fwd = 'L'; break; | |
1062 | case IP_VS_CONN_F_TUNNEL: | |
1063 | fwd = 'T'; break; | |
1064 | case IP_VS_CONN_F_DROUTE: | |
1065 | fwd = 'R'; break; | |
1066 | case IP_VS_CONN_F_BYPASS: | |
1067 | fwd = 'B'; break; | |
1068 | default: | |
1069 | fwd = '?'; break; | |
1070 | } | |
1071 | return fwd; | |
1072 | } | |
1073 | ||
1da177e4 | 1074 | extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
b3cdd2a7 JV |
1075 | struct ip_vs_conn *cp, int dir); |
1076 | ||
1077 | #ifdef CONFIG_IP_VS_IPV6 | |
1078 | extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
1079 | struct ip_vs_conn *cp, int dir); | |
1080 | #endif | |
1da177e4 | 1081 | |
b1550f22 | 1082 | extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1083 | |
f9214b26 | 1084 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1085 | { |
f9214b26 | 1086 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1087 | |
07f0757a | 1088 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1089 | } |
1090 | ||
0bbdd42b JV |
1091 | #ifdef CONFIG_IP_VS_IPV6 |
1092 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1093 | __wsum oldsum) | |
1094 | { | |
1095 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1096 | new[3], new[2], new[1], new[0] }; | |
1097 | ||
07f0757a | 1098 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1099 | } |
1100 | #endif | |
1101 | ||
f9214b26 AV |
1102 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1103 | { | |
1104 | __be16 diff[2] = { ~old, new }; | |
1105 | ||
07f0757a | 1106 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1107 | } |
1108 | ||
cf356d69 JA |
1109 | /* |
1110 | * Forget current conntrack (unconfirmed) and attach notrack entry | |
1111 | */ | |
1112 | static inline void ip_vs_notrack(struct sk_buff *skb) | |
1113 | { | |
1114 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1115 | enum ip_conntrack_info ctinfo; | |
1116 | struct nf_conn *ct = ct = nf_ct_get(skb, &ctinfo); | |
1117 | ||
1118 | if (!ct || !nf_ct_is_untracked(ct)) { | |
1119 | nf_reset(skb); | |
1120 | skb->nfct = &nf_ct_untracked_get()->ct_general; | |
1121 | skb->nfctinfo = IP_CT_NEW; | |
1122 | nf_conntrack_get(skb->nfct); | |
1123 | } | |
1124 | #endif | |
1125 | } | |
1126 | ||
f4bc17cd JA |
1127 | #ifdef CONFIG_IP_VS_NFCT |
1128 | /* | |
1129 | * Netfilter connection tracking | |
1130 | * (from ip_vs_nfct.c) | |
1131 | */ | |
1132 | static inline int ip_vs_conntrack_enabled(void) | |
1133 | { | |
1134 | return sysctl_ip_vs_conntrack; | |
1135 | } | |
1136 | ||
6523ce15 JA |
1137 | extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1138 | int outin); | |
f4bc17cd JA |
1139 | extern int ip_vs_confirm_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp); |
1140 | extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1141 | struct ip_vs_conn *cp, u_int8_t proto, | |
1142 | const __be16 port, int from_rs); | |
1143 | extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
1144 | ||
1145 | #else | |
1146 | ||
1147 | static inline int ip_vs_conntrack_enabled(void) | |
1148 | { | |
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1153 | struct ip_vs_conn *cp, int outin) | |
1154 | { | |
1155 | } | |
1156 | ||
1157 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb, | |
1158 | struct ip_vs_conn *cp) | |
1159 | { | |
1160 | return NF_ACCEPT; | |
1161 | } | |
1162 | ||
1163 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1164 | { | |
1165 | } | |
1166 | /* CONFIG_IP_VS_NFCT */ | |
1167 | #endif | |
6523ce15 | 1168 | |
1da177e4 LT |
1169 | #endif /* __KERNEL__ */ |
1170 | ||
bc4768eb | 1171 | #endif /* _NET_IP_VS_H */ |