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> |
1da177e4 LT |
24 | |
25 | #ifdef CONFIG_IP_VS_DEBUG | |
14c85021 ACM |
26 | #include <linux/net.h> |
27 | ||
1da177e4 LT |
28 | extern int ip_vs_get_debug_level(void); |
29 | #define IP_VS_DBG(level, msg...) \ | |
30 | do { \ | |
31 | if (level <= ip_vs_get_debug_level()) \ | |
32 | printk(KERN_DEBUG "IPVS: " msg); \ | |
33 | } while (0) | |
34 | #define IP_VS_DBG_RL(msg...) \ | |
35 | do { \ | |
36 | if (net_ratelimit()) \ | |
37 | printk(KERN_DEBUG "IPVS: " msg); \ | |
38 | } while (0) | |
39 | #define IP_VS_DBG_PKT(level, pp, skb, ofs, msg) \ | |
40 | do { \ | |
41 | if (level <= ip_vs_get_debug_level()) \ | |
42 | pp->debug_packet(pp, skb, ofs, msg); \ | |
43 | } while (0) | |
44 | #define IP_VS_DBG_RL_PKT(level, pp, skb, ofs, msg) \ | |
45 | do { \ | |
46 | if (level <= ip_vs_get_debug_level() && \ | |
47 | net_ratelimit()) \ | |
48 | pp->debug_packet(pp, skb, ofs, msg); \ | |
49 | } while (0) | |
50 | #else /* NO DEBUGGING at ALL */ | |
51 | #define IP_VS_DBG(level, msg...) do {} while (0) | |
52 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
53 | #define IP_VS_DBG_PKT(level, pp, skb, ofs, msg) do {} while (0) | |
54 | #define IP_VS_DBG_RL_PKT(level, pp, skb, ofs, msg) do {} while (0) | |
55 | #endif | |
56 | ||
57 | #define IP_VS_BUG() BUG() | |
58 | #define IP_VS_ERR(msg...) printk(KERN_ERR "IPVS: " msg) | |
59 | #define IP_VS_INFO(msg...) printk(KERN_INFO "IPVS: " msg) | |
60 | #define IP_VS_WARNING(msg...) \ | |
61 | printk(KERN_WARNING "IPVS: " msg) | |
62 | #define IP_VS_ERR_RL(msg...) \ | |
63 | do { \ | |
64 | if (net_ratelimit()) \ | |
65 | printk(KERN_ERR "IPVS: " msg); \ | |
66 | } while (0) | |
67 | ||
68 | #ifdef CONFIG_IP_VS_DEBUG | |
69 | #define EnterFunction(level) \ | |
70 | do { \ | |
71 | if (level <= ip_vs_get_debug_level()) \ | |
72 | printk(KERN_DEBUG "Enter: %s, %s line %i\n", \ | |
73 | __FUNCTION__, __FILE__, __LINE__); \ | |
74 | } while (0) | |
75 | #define LeaveFunction(level) \ | |
76 | do { \ | |
77 | if (level <= ip_vs_get_debug_level()) \ | |
78 | printk(KERN_DEBUG "Leave: %s, %s line %i\n", \ | |
79 | __FUNCTION__, __FILE__, __LINE__); \ | |
80 | } while (0) | |
81 | #else | |
82 | #define EnterFunction(level) do {} while (0) | |
83 | #define LeaveFunction(level) do {} while (0) | |
84 | #endif | |
85 | ||
86 | #define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); } | |
87 | ||
88 | ||
89 | /* | |
90 | * The port number of FTP service (in network order). | |
91 | */ | |
92 | #define FTPPORT __constant_htons(21) | |
93 | #define FTPDATA __constant_htons(20) | |
94 | ||
1da177e4 LT |
95 | /* |
96 | * TCP State Values | |
97 | */ | |
98 | enum { | |
99 | IP_VS_TCP_S_NONE = 0, | |
100 | IP_VS_TCP_S_ESTABLISHED, | |
101 | IP_VS_TCP_S_SYN_SENT, | |
102 | IP_VS_TCP_S_SYN_RECV, | |
103 | IP_VS_TCP_S_FIN_WAIT, | |
104 | IP_VS_TCP_S_TIME_WAIT, | |
105 | IP_VS_TCP_S_CLOSE, | |
106 | IP_VS_TCP_S_CLOSE_WAIT, | |
107 | IP_VS_TCP_S_LAST_ACK, | |
108 | IP_VS_TCP_S_LISTEN, | |
109 | IP_VS_TCP_S_SYNACK, | |
110 | IP_VS_TCP_S_LAST | |
111 | }; | |
112 | ||
113 | /* | |
114 | * UDP State Values | |
115 | */ | |
116 | enum { | |
117 | IP_VS_UDP_S_NORMAL, | |
118 | IP_VS_UDP_S_LAST, | |
119 | }; | |
120 | ||
121 | /* | |
122 | * ICMP State Values | |
123 | */ | |
124 | enum { | |
125 | IP_VS_ICMP_S_NORMAL, | |
126 | IP_VS_ICMP_S_LAST, | |
127 | }; | |
128 | ||
129 | /* | |
130 | * Delta sequence info structure | |
131 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
132 | * Only used in the VS/NAT. | |
133 | */ | |
134 | struct ip_vs_seq { | |
135 | __u32 init_seq; /* Add delta from this seq */ | |
136 | __u32 delta; /* Delta in sequence numbers */ | |
137 | __u32 previous_delta; /* Delta in sequence numbers | |
138 | before last resized pkt */ | |
139 | }; | |
140 | ||
141 | ||
142 | /* | |
3a14a313 | 143 | * IPVS statistics objects |
1da177e4 | 144 | */ |
3a14a313 SW |
145 | struct ip_vs_estimator { |
146 | struct list_head list; | |
147 | ||
148 | u64 last_inbytes; | |
149 | u64 last_outbytes; | |
150 | u32 last_conns; | |
151 | u32 last_inpkts; | |
152 | u32 last_outpkts; | |
153 | ||
154 | u32 cps; | |
155 | u32 inpps; | |
156 | u32 outpps; | |
157 | u32 inbps; | |
158 | u32 outbps; | |
159 | }; | |
160 | ||
1da177e4 LT |
161 | struct ip_vs_stats |
162 | { | |
163 | __u32 conns; /* connections scheduled */ | |
164 | __u32 inpkts; /* incoming packets */ | |
165 | __u32 outpkts; /* outgoing packets */ | |
166 | __u64 inbytes; /* incoming bytes */ | |
167 | __u64 outbytes; /* outgoing bytes */ | |
168 | ||
169 | __u32 cps; /* current connection rate */ | |
170 | __u32 inpps; /* current in packet rate */ | |
171 | __u32 outpps; /* current out packet rate */ | |
172 | __u32 inbps; /* current in byte rate */ | |
173 | __u32 outbps; /* current out byte rate */ | |
174 | ||
3a14a313 SW |
175 | /* |
176 | * Don't add anything before the lock, because we use memcpy() to copy | |
177 | * the members before the lock to struct ip_vs_stats_user in | |
178 | * ip_vs_ctl.c. | |
179 | */ | |
180 | ||
1da177e4 | 181 | spinlock_t lock; /* spin lock */ |
3a14a313 SW |
182 | |
183 | struct ip_vs_estimator est; /* estimator */ | |
1da177e4 LT |
184 | }; |
185 | ||
14c85021 ACM |
186 | struct dst_entry; |
187 | struct iphdr; | |
1da177e4 LT |
188 | struct ip_vs_conn; |
189 | struct ip_vs_app; | |
14c85021 | 190 | struct sk_buff; |
1da177e4 LT |
191 | |
192 | struct ip_vs_protocol { | |
193 | struct ip_vs_protocol *next; | |
194 | char *name; | |
2ad17def JA |
195 | u16 protocol; |
196 | u16 num_states; | |
1da177e4 LT |
197 | int dont_defrag; |
198 | atomic_t appcnt; /* counter of proto app incs */ | |
199 | int *timeout_table; /* protocol timeout table */ | |
200 | ||
201 | void (*init)(struct ip_vs_protocol *pp); | |
202 | ||
203 | void (*exit)(struct ip_vs_protocol *pp); | |
204 | ||
205 | int (*conn_schedule)(struct sk_buff *skb, | |
206 | struct ip_vs_protocol *pp, | |
207 | int *verdict, struct ip_vs_conn **cpp); | |
208 | ||
209 | struct ip_vs_conn * | |
210 | (*conn_in_get)(const struct sk_buff *skb, | |
211 | struct ip_vs_protocol *pp, | |
212 | const struct iphdr *iph, | |
213 | unsigned int proto_off, | |
214 | int inverse); | |
215 | ||
216 | struct ip_vs_conn * | |
217 | (*conn_out_get)(const struct sk_buff *skb, | |
218 | struct ip_vs_protocol *pp, | |
219 | const struct iphdr *iph, | |
220 | unsigned int proto_off, | |
221 | int inverse); | |
222 | ||
3db05fea | 223 | int (*snat_handler)(struct sk_buff *skb, |
1da177e4 LT |
224 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
225 | ||
3db05fea | 226 | int (*dnat_handler)(struct sk_buff *skb, |
1da177e4 LT |
227 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
228 | ||
229 | int (*csum_check)(struct sk_buff *skb, struct ip_vs_protocol *pp); | |
230 | ||
231 | const char *(*state_name)(int state); | |
232 | ||
233 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
234 | const struct sk_buff *skb, | |
235 | struct ip_vs_protocol *pp); | |
236 | ||
237 | int (*register_app)(struct ip_vs_app *inc); | |
238 | ||
239 | void (*unregister_app)(struct ip_vs_app *inc); | |
240 | ||
241 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
242 | ||
243 | void (*debug_packet)(struct ip_vs_protocol *pp, | |
244 | const struct sk_buff *skb, | |
245 | int offset, | |
246 | const char *msg); | |
247 | ||
248 | void (*timeout_change)(struct ip_vs_protocol *pp, int flags); | |
249 | ||
250 | int (*set_state_timeout)(struct ip_vs_protocol *pp, char *sname, int to); | |
251 | }; | |
252 | ||
253 | extern struct ip_vs_protocol * ip_vs_proto_get(unsigned short proto); | |
254 | ||
255 | /* | |
256 | * IP_VS structure allocated for each dynamically scheduled connection | |
257 | */ | |
258 | struct ip_vs_conn { | |
259 | struct list_head c_list; /* hashed list heads */ | |
260 | ||
261 | /* Protocol, addresses and port numbers */ | |
014d730d AV |
262 | __be32 caddr; /* client address */ |
263 | __be32 vaddr; /* virtual address */ | |
264 | __be32 daddr; /* destination address */ | |
265 | __be16 cport; | |
266 | __be16 vport; | |
267 | __be16 dport; | |
1da177e4 LT |
268 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
269 | ||
270 | /* counter and timer */ | |
271 | atomic_t refcnt; /* reference count */ | |
272 | struct timer_list timer; /* Expiration timer */ | |
273 | volatile unsigned long timeout; /* timeout */ | |
274 | ||
275 | /* Flags and state transition */ | |
276 | spinlock_t lock; /* lock for state transition */ | |
277 | volatile __u16 flags; /* status flags */ | |
278 | volatile __u16 state; /* state info */ | |
efac5276 RB |
279 | volatile __u16 old_state; /* old state, to be used for |
280 | * state transition triggerd | |
281 | * synchronization | |
282 | */ | |
1da177e4 LT |
283 | |
284 | /* Control members */ | |
285 | struct ip_vs_conn *control; /* Master control connection */ | |
286 | atomic_t n_control; /* Number of controlled ones */ | |
287 | struct ip_vs_dest *dest; /* real server */ | |
288 | atomic_t in_pkts; /* incoming packet counter */ | |
289 | ||
290 | /* packet transmitter for different forwarding methods. If it | |
291 | mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
292 | otherwise this must be changed to a sk_buff **. | |
293 | */ | |
294 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
295 | struct ip_vs_protocol *pp); | |
296 | ||
297 | /* Note: we can group the following members into a structure, | |
298 | in order to save more space, and the following members are | |
299 | only used in VS/NAT anyway */ | |
300 | struct ip_vs_app *app; /* bound ip_vs_app object */ | |
301 | void *app_data; /* Application private data */ | |
302 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
303 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
304 | }; | |
305 | ||
306 | ||
307 | /* | |
308 | * The information about the virtual service offered to the net | |
309 | * and the forwarding entries | |
310 | */ | |
311 | struct ip_vs_service { | |
312 | struct list_head s_list; /* for normal service table */ | |
313 | struct list_head f_list; /* for fwmark-based service table */ | |
314 | atomic_t refcnt; /* reference counter */ | |
315 | atomic_t usecnt; /* use counter */ | |
316 | ||
317 | __u16 protocol; /* which protocol (TCP/UDP) */ | |
014d730d AV |
318 | __be32 addr; /* IP address for virtual service */ |
319 | __be16 port; /* port number for the service */ | |
1da177e4 LT |
320 | __u32 fwmark; /* firewall mark of the service */ |
321 | unsigned flags; /* service status flags */ | |
322 | unsigned timeout; /* persistent timeout in ticks */ | |
014d730d | 323 | __be32 netmask; /* grouping granularity */ |
1da177e4 LT |
324 | |
325 | struct list_head destinations; /* real server d-linked list */ | |
326 | __u32 num_dests; /* number of servers */ | |
327 | struct ip_vs_stats stats; /* statistics for the service */ | |
328 | struct ip_vs_app *inc; /* bind conns to this app inc */ | |
329 | ||
330 | /* for scheduling */ | |
331 | struct ip_vs_scheduler *scheduler; /* bound scheduler object */ | |
332 | rwlock_t sched_lock; /* lock sched_data */ | |
333 | void *sched_data; /* scheduler application data */ | |
334 | }; | |
335 | ||
336 | ||
337 | /* | |
338 | * The real server destination forwarding entry | |
339 | * with ip address, port number, and so on. | |
340 | */ | |
341 | struct ip_vs_dest { | |
342 | struct list_head n_list; /* for the dests in the service */ | |
343 | struct list_head d_list; /* for table with all the dests */ | |
344 | ||
014d730d AV |
345 | __be32 addr; /* IP address of the server */ |
346 | __be16 port; /* port number of the server */ | |
1da177e4 LT |
347 | volatile unsigned flags; /* dest status flags */ |
348 | atomic_t conn_flags; /* flags to copy to conn */ | |
349 | atomic_t weight; /* server weight */ | |
350 | ||
351 | atomic_t refcnt; /* reference counter */ | |
352 | struct ip_vs_stats stats; /* statistics */ | |
353 | ||
354 | /* connection counters and thresholds */ | |
355 | atomic_t activeconns; /* active connections */ | |
356 | atomic_t inactconns; /* inactive connections */ | |
357 | atomic_t persistconns; /* persistent connections */ | |
358 | __u32 u_threshold; /* upper threshold */ | |
359 | __u32 l_threshold; /* lower threshold */ | |
360 | ||
361 | /* for destination cache */ | |
362 | spinlock_t dst_lock; /* lock of dst_cache */ | |
363 | struct dst_entry *dst_cache; /* destination cache entry */ | |
364 | u32 dst_rtos; /* RT_TOS(tos) for dst */ | |
365 | ||
366 | /* for virtual service */ | |
367 | struct ip_vs_service *svc; /* service it belongs to */ | |
368 | __u16 protocol; /* which protocol (TCP/UDP) */ | |
014d730d AV |
369 | __be32 vaddr; /* virtual IP address */ |
370 | __be16 vport; /* virtual port number */ | |
1da177e4 LT |
371 | __u32 vfwmark; /* firewall mark of service */ |
372 | }; | |
373 | ||
374 | ||
375 | /* | |
376 | * The scheduler object | |
377 | */ | |
378 | struct ip_vs_scheduler { | |
379 | struct list_head n_list; /* d-linked list head */ | |
380 | char *name; /* scheduler name */ | |
381 | atomic_t refcnt; /* reference counter */ | |
382 | struct module *module; /* THIS_MODULE/NULL */ | |
383 | ||
384 | /* scheduler initializing service */ | |
385 | int (*init_service)(struct ip_vs_service *svc); | |
386 | /* scheduling service finish */ | |
387 | int (*done_service)(struct ip_vs_service *svc); | |
388 | /* scheduler updating service */ | |
389 | int (*update_service)(struct ip_vs_service *svc); | |
390 | ||
391 | /* selecting a server from the given service */ | |
392 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
393 | const struct sk_buff *skb); | |
394 | }; | |
395 | ||
396 | ||
397 | /* | |
398 | * The application module object (a.k.a. app incarnation) | |
399 | */ | |
400 | struct ip_vs_app | |
401 | { | |
402 | struct list_head a_list; /* member in app list */ | |
403 | int type; /* IP_VS_APP_TYPE_xxx */ | |
404 | char *name; /* application module name */ | |
405 | __u16 protocol; | |
406 | struct module *module; /* THIS_MODULE/NULL */ | |
407 | struct list_head incs_list; /* list of incarnations */ | |
408 | ||
409 | /* members for application incarnations */ | |
410 | struct list_head p_list; /* member in proto app list */ | |
411 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 412 | __be16 port; /* port number in net order */ |
1da177e4 LT |
413 | atomic_t usecnt; /* usage counter */ |
414 | ||
415 | /* output hook: return false if can't linearize. diff set for TCP. */ | |
416 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, | |
3db05fea | 417 | struct sk_buff *, int *diff); |
1da177e4 LT |
418 | |
419 | /* input hook: return false if can't linearize. diff set for TCP. */ | |
420 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, | |
3db05fea | 421 | struct sk_buff *, int *diff); |
1da177e4 LT |
422 | |
423 | /* ip_vs_app initializer */ | |
424 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
425 | ||
426 | /* ip_vs_app finish */ | |
427 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
428 | ||
429 | ||
430 | /* not used now */ | |
431 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
432 | struct ip_vs_protocol *); | |
433 | ||
434 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
435 | ||
436 | int * timeout_table; | |
437 | int * timeouts; | |
438 | int timeouts_size; | |
439 | ||
440 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
441 | int *verdict, struct ip_vs_conn **cpp); | |
442 | ||
443 | struct ip_vs_conn * | |
444 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
445 | const struct iphdr *iph, unsigned int proto_off, | |
446 | int inverse); | |
447 | ||
448 | struct ip_vs_conn * | |
449 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
450 | const struct iphdr *iph, unsigned int proto_off, | |
451 | int inverse); | |
452 | ||
453 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
454 | const struct sk_buff *skb, | |
455 | struct ip_vs_app *app); | |
456 | ||
457 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
458 | }; | |
459 | ||
460 | ||
461 | /* | |
462 | * IPVS core functions | |
463 | * (from ip_vs_core.c) | |
464 | */ | |
465 | extern const char *ip_vs_proto_name(unsigned proto); | |
466 | extern void ip_vs_init_hash_table(struct list_head *table, int rows); | |
afdd6140 | 467 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 468 | |
1da177e4 LT |
469 | #define IP_VS_APP_TYPE_FTP 1 |
470 | ||
471 | /* | |
472 | * ip_vs_conn handling functions | |
473 | * (from ip_vs_conn.c) | |
474 | */ | |
475 | ||
476 | /* | |
477 | * IPVS connection entry hash table | |
478 | */ | |
479 | #ifndef CONFIG_IP_VS_TAB_BITS | |
480 | #define CONFIG_IP_VS_TAB_BITS 12 | |
481 | #endif | |
482 | /* make sure that IP_VS_CONN_TAB_BITS is located in [8, 20] */ | |
483 | #if CONFIG_IP_VS_TAB_BITS < 8 | |
484 | #define IP_VS_CONN_TAB_BITS 8 | |
485 | #endif | |
486 | #if CONFIG_IP_VS_TAB_BITS > 20 | |
487 | #define IP_VS_CONN_TAB_BITS 20 | |
488 | #endif | |
489 | #if 8 <= CONFIG_IP_VS_TAB_BITS && CONFIG_IP_VS_TAB_BITS <= 20 | |
490 | #define IP_VS_CONN_TAB_BITS CONFIG_IP_VS_TAB_BITS | |
491 | #endif | |
492 | #define IP_VS_CONN_TAB_SIZE (1 << IP_VS_CONN_TAB_BITS) | |
493 | #define IP_VS_CONN_TAB_MASK (IP_VS_CONN_TAB_SIZE - 1) | |
494 | ||
495 | enum { | |
496 | IP_VS_DIR_INPUT = 0, | |
497 | IP_VS_DIR_OUTPUT, | |
498 | IP_VS_DIR_INPUT_ONLY, | |
499 | IP_VS_DIR_LAST, | |
500 | }; | |
501 | ||
502 | extern struct ip_vs_conn *ip_vs_conn_in_get | |
014d730d | 503 | (int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port); |
87375ab4 | 504 | extern struct ip_vs_conn *ip_vs_ct_in_get |
014d730d | 505 | (int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port); |
1da177e4 | 506 | extern struct ip_vs_conn *ip_vs_conn_out_get |
014d730d | 507 | (int protocol, __be32 s_addr, __be16 s_port, __be32 d_addr, __be16 d_port); |
1da177e4 LT |
508 | |
509 | /* put back the conn without restarting its timer */ | |
510 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
511 | { | |
512 | atomic_dec(&cp->refcnt); | |
513 | } | |
514 | extern void ip_vs_conn_put(struct ip_vs_conn *cp); | |
014d730d | 515 | extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); |
1da177e4 LT |
516 | |
517 | extern struct ip_vs_conn * | |
014d730d AV |
518 | ip_vs_conn_new(int proto, __be32 caddr, __be16 cport, __be32 vaddr, __be16 vport, |
519 | __be32 daddr, __be16 dport, unsigned flags, | |
1da177e4 LT |
520 | struct ip_vs_dest *dest); |
521 | extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp); | |
522 | ||
523 | extern const char * ip_vs_state_name(__u16 proto, int state); | |
524 | ||
525 | extern void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp); | |
526 | extern int ip_vs_check_template(struct ip_vs_conn *ct); | |
1da177e4 LT |
527 | extern void ip_vs_random_dropentry(void); |
528 | extern int ip_vs_conn_init(void); | |
529 | extern void ip_vs_conn_cleanup(void); | |
530 | ||
531 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
532 | { | |
533 | struct ip_vs_conn *ctl_cp = cp->control; | |
534 | if (!ctl_cp) { | |
535 | IP_VS_ERR("request control DEL for uncontrolled: " | |
536 | "%d.%d.%d.%d:%d to %d.%d.%d.%d:%d\n", | |
537 | NIPQUAD(cp->caddr),ntohs(cp->cport), | |
538 | NIPQUAD(cp->vaddr),ntohs(cp->vport)); | |
539 | return; | |
540 | } | |
541 | ||
542 | IP_VS_DBG(7, "DELeting control for: " | |
543 | "cp.dst=%d.%d.%d.%d:%d ctl_cp.dst=%d.%d.%d.%d:%d\n", | |
544 | NIPQUAD(cp->caddr),ntohs(cp->cport), | |
545 | NIPQUAD(ctl_cp->caddr),ntohs(ctl_cp->cport)); | |
546 | ||
547 | cp->control = NULL; | |
548 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
549 | IP_VS_ERR("BUG control DEL with n=0 : " | |
550 | "%d.%d.%d.%d:%d to %d.%d.%d.%d:%d\n", | |
551 | NIPQUAD(cp->caddr),ntohs(cp->cport), | |
552 | NIPQUAD(cp->vaddr),ntohs(cp->vport)); | |
553 | return; | |
554 | } | |
555 | atomic_dec(&ctl_cp->n_control); | |
556 | } | |
557 | ||
558 | static inline void | |
559 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
560 | { | |
561 | if (cp->control) { | |
562 | IP_VS_ERR("request control ADD for already controlled: " | |
563 | "%d.%d.%d.%d:%d to %d.%d.%d.%d:%d\n", | |
564 | NIPQUAD(cp->caddr),ntohs(cp->cport), | |
565 | NIPQUAD(cp->vaddr),ntohs(cp->vport)); | |
566 | ip_vs_control_del(cp); | |
567 | } | |
568 | ||
569 | IP_VS_DBG(7, "ADDing control for: " | |
570 | "cp.dst=%d.%d.%d.%d:%d ctl_cp.dst=%d.%d.%d.%d:%d\n", | |
571 | NIPQUAD(cp->caddr),ntohs(cp->cport), | |
572 | NIPQUAD(ctl_cp->caddr),ntohs(ctl_cp->cport)); | |
573 | ||
574 | cp->control = ctl_cp; | |
575 | atomic_inc(&ctl_cp->n_control); | |
576 | } | |
577 | ||
578 | ||
579 | /* | |
580 | * IPVS application functions | |
581 | * (from ip_vs_app.c) | |
582 | */ | |
583 | #define IP_VS_APP_MAX_PORTS 8 | |
584 | extern int register_ip_vs_app(struct ip_vs_app *app); | |
585 | extern void unregister_ip_vs_app(struct ip_vs_app *app); | |
586 | extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
587 | extern void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
588 | extern int | |
589 | register_ip_vs_app_inc(struct ip_vs_app *app, __u16 proto, __u16 port); | |
590 | extern int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
591 | extern void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
592 | ||
3db05fea HX |
593 | extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); |
594 | extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
dd0fc66f | 595 | extern int ip_vs_skb_replace(struct sk_buff *skb, gfp_t pri, |
1da177e4 LT |
596 | char *o_buf, int o_len, char *n_buf, int n_len); |
597 | extern int ip_vs_app_init(void); | |
598 | extern void ip_vs_app_cleanup(void); | |
599 | ||
600 | ||
601 | /* | |
602 | * IPVS protocol functions (from ip_vs_proto.c) | |
603 | */ | |
604 | extern int ip_vs_protocol_init(void); | |
605 | extern void ip_vs_protocol_cleanup(void); | |
606 | extern void ip_vs_protocol_timeout_change(int flags); | |
607 | extern int *ip_vs_create_timeout_table(int *table, int size); | |
608 | extern int | |
609 | ip_vs_set_state_timeout(int *table, int num, char **names, char *name, int to); | |
610 | extern void | |
611 | ip_vs_tcpudp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb, | |
612 | int offset, const char *msg); | |
613 | ||
614 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
615 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
616 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
617 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
618 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
619 | ||
620 | ||
621 | /* | |
622 | * Registering/unregistering scheduler functions | |
623 | * (from ip_vs_sched.c) | |
624 | */ | |
625 | extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
626 | extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
627 | extern int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
628 | struct ip_vs_scheduler *scheduler); | |
629 | extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc); | |
630 | extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
631 | extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
632 | extern struct ip_vs_conn * | |
633 | ip_vs_schedule(struct ip_vs_service *svc, const struct sk_buff *skb); | |
634 | extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, | |
635 | struct ip_vs_protocol *pp); | |
636 | ||
637 | ||
638 | /* | |
639 | * IPVS control data and functions (from ip_vs_ctl.c) | |
640 | */ | |
641 | extern int sysctl_ip_vs_cache_bypass; | |
642 | extern int sysctl_ip_vs_expire_nodest_conn; | |
643 | extern int sysctl_ip_vs_expire_quiescent_template; | |
644 | extern int sysctl_ip_vs_sync_threshold[2]; | |
645 | extern int sysctl_ip_vs_nat_icmp_send; | |
646 | extern struct ip_vs_stats ip_vs_stats; | |
5587da55 | 647 | extern const struct ctl_path net_vs_ctl_path[]; |
1da177e4 LT |
648 | |
649 | extern struct ip_vs_service * | |
014d730d | 650 | ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport); |
1da177e4 LT |
651 | |
652 | static inline void ip_vs_service_put(struct ip_vs_service *svc) | |
653 | { | |
654 | atomic_dec(&svc->usecnt); | |
655 | } | |
656 | ||
657 | extern struct ip_vs_dest * | |
014d730d | 658 | ip_vs_lookup_real_service(__u16 protocol, __be32 daddr, __be16 dport); |
1da177e4 LT |
659 | extern int ip_vs_use_count_inc(void); |
660 | extern void ip_vs_use_count_dec(void); | |
661 | extern int ip_vs_control_init(void); | |
662 | extern void ip_vs_control_cleanup(void); | |
1e356f9c RB |
663 | extern struct ip_vs_dest * |
664 | ip_vs_find_dest(__be32 daddr, __be16 dport, | |
665 | __be32 vaddr, __be16 vport, __u16 protocol); | |
666 | extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp); | |
1da177e4 LT |
667 | |
668 | ||
669 | /* | |
670 | * IPVS sync daemon data and function prototypes | |
671 | * (from ip_vs_sync.c) | |
672 | */ | |
673 | extern volatile int ip_vs_sync_state; | |
674 | extern volatile int ip_vs_master_syncid; | |
675 | extern volatile int ip_vs_backup_syncid; | |
676 | extern char ip_vs_master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
677 | extern char ip_vs_backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
678 | extern int start_sync_thread(int state, char *mcast_ifn, __u8 syncid); | |
679 | extern int stop_sync_thread(int state); | |
680 | extern void ip_vs_sync_conn(struct ip_vs_conn *cp); | |
681 | ||
682 | ||
683 | /* | |
684 | * IPVS rate estimator prototypes (from ip_vs_est.c) | |
685 | */ | |
3a14a313 | 686 | extern void ip_vs_new_estimator(struct ip_vs_stats *stats); |
1da177e4 LT |
687 | extern void ip_vs_kill_estimator(struct ip_vs_stats *stats); |
688 | extern void ip_vs_zero_estimator(struct ip_vs_stats *stats); | |
689 | ||
690 | /* | |
691 | * Various IPVS packet transmitters (from ip_vs_xmit.c) | |
692 | */ | |
693 | extern int ip_vs_null_xmit | |
694 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
695 | extern int ip_vs_bypass_xmit | |
696 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
697 | extern int ip_vs_nat_xmit | |
698 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
699 | extern int ip_vs_tunnel_xmit | |
700 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
701 | extern int ip_vs_dr_xmit | |
702 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
703 | extern int ip_vs_icmp_xmit | |
704 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, int offset); | |
705 | extern void ip_vs_dst_reset(struct ip_vs_dest *dest); | |
706 | ||
707 | ||
708 | /* | |
709 | * This is a simple mechanism to ignore packets when | |
710 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
711 | * we start to drop 1/rate of the packets | |
712 | */ | |
713 | extern int ip_vs_drop_rate; | |
714 | extern int ip_vs_drop_counter; | |
715 | ||
716 | static __inline__ int ip_vs_todrop(void) | |
717 | { | |
718 | if (!ip_vs_drop_rate) return 0; | |
719 | if (--ip_vs_drop_counter > 0) return 0; | |
720 | ip_vs_drop_counter = ip_vs_drop_rate; | |
721 | return 1; | |
722 | } | |
723 | ||
724 | /* | |
725 | * ip_vs_fwd_tag returns the forwarding tag of the connection | |
726 | */ | |
727 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) | |
728 | ||
732db659 | 729 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
730 | { |
731 | char fwd; | |
732 | ||
733 | switch (IP_VS_FWD_METHOD(cp)) { | |
734 | case IP_VS_CONN_F_MASQ: | |
735 | fwd = 'M'; break; | |
736 | case IP_VS_CONN_F_LOCALNODE: | |
737 | fwd = 'L'; break; | |
738 | case IP_VS_CONN_F_TUNNEL: | |
739 | fwd = 'T'; break; | |
740 | case IP_VS_CONN_F_DROUTE: | |
741 | fwd = 'R'; break; | |
742 | case IP_VS_CONN_F_BYPASS: | |
743 | fwd = 'B'; break; | |
744 | default: | |
745 | fwd = '?'; break; | |
746 | } | |
747 | return fwd; | |
748 | } | |
749 | ||
1da177e4 LT |
750 | extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
751 | struct ip_vs_conn *cp, int dir); | |
752 | ||
b1550f22 | 753 | extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 754 | |
f9214b26 | 755 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 756 | { |
f9214b26 | 757 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 758 | |
f9214b26 AV |
759 | return csum_partial((char *) diff, sizeof(diff), oldsum); |
760 | } | |
761 | ||
762 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) | |
763 | { | |
764 | __be16 diff[2] = { ~old, new }; | |
765 | ||
766 | return csum_partial((char *) diff, sizeof(diff), oldsum); | |
1da177e4 LT |
767 | } |
768 | ||
769 | #endif /* __KERNEL__ */ | |
770 | ||
bc4768eb | 771 | #endif /* _NET_IP_VS_H */ |