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Commit | Line | Data |
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1 | /* | |
2 | * IP Virtual Server | |
3 | * data structure and functionality definitions | |
4 | */ | |
5 | ||
6 | #ifndef _NET_IP_VS_H | |
7 | #define _NET_IP_VS_H | |
8 | ||
9 | #include <linux/ip_vs.h> /* definitions shared with userland */ | |
10 | ||
11 | #include <asm/types.h> /* for __uXX types */ | |
12 | ||
13 | #include <linux/list.h> /* for struct list_head */ | |
14 | #include <linux/spinlock.h> /* for struct rwlock_t */ | |
15 | #include <linux/atomic.h> /* for struct atomic_t */ | |
16 | #include <linux/compiler.h> | |
17 | #include <linux/timer.h> | |
18 | #include <linux/bug.h> | |
19 | ||
20 | #include <net/checksum.h> | |
21 | #include <linux/netfilter.h> /* for union nf_inet_addr */ | |
22 | #include <linux/ip.h> | |
23 | #include <linux/ipv6.h> /* for struct ipv6hdr */ | |
24 | #include <net/ipv6.h> | |
25 | #if IS_ENABLED(CONFIG_IP_VS_IPV6) | |
26 | #include <linux/netfilter_ipv6/ip6_tables.h> | |
27 | #endif | |
28 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) | |
29 | #include <net/netfilter/nf_conntrack.h> | |
30 | #endif | |
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 | } | |
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(const 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) && 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(const 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 | } | |
93 | /* | |
94 | * This one needed for single_open_net since net is stored directly in | |
95 | * private not as a struct i.e. seq_file_net can't be used. | |
96 | */ | |
97 | static inline struct net *seq_file_single_net(struct seq_file *seq) | |
98 | { | |
99 | #ifdef CONFIG_NET_NS | |
100 | return (struct net *)seq->private; | |
101 | #else | |
102 | return &init_net; | |
103 | #endif | |
104 | } | |
105 | ||
106 | /* Connections' size value needed by ip_vs_ctl.c */ | |
107 | extern int ip_vs_conn_tab_size; | |
108 | ||
109 | struct ip_vs_iphdr { | |
110 | __u32 len; /* IPv4 simply where L4 starts | |
111 | IPv6 where L4 Transport Header starts */ | |
112 | __u32 thoff_reasm; /* Transport Header Offset in nfct_reasm skb */ | |
113 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ | |
114 | __s16 protocol; | |
115 | __s32 flags; | |
116 | union nf_inet_addr saddr; | |
117 | union nf_inet_addr daddr; | |
118 | }; | |
119 | ||
120 | /* Dependency to module: nf_defrag_ipv6 */ | |
121 | #if defined(CONFIG_NF_DEFRAG_IPV6) || defined(CONFIG_NF_DEFRAG_IPV6_MODULE) | |
122 | static inline struct sk_buff *skb_nfct_reasm(const struct sk_buff *skb) | |
123 | { | |
124 | return skb->nfct_reasm; | |
125 | } | |
126 | static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, | |
127 | int len, void *buffer, | |
128 | const struct ip_vs_iphdr *ipvsh) | |
129 | { | |
130 | if (unlikely(ipvsh->fragoffs && skb_nfct_reasm(skb))) | |
131 | return skb_header_pointer(skb_nfct_reasm(skb), | |
132 | ipvsh->thoff_reasm, len, buffer); | |
133 | ||
134 | return skb_header_pointer(skb, offset, len, buffer); | |
135 | } | |
136 | #else | |
137 | static inline struct sk_buff *skb_nfct_reasm(const struct sk_buff *skb) | |
138 | { | |
139 | return NULL; | |
140 | } | |
141 | static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, | |
142 | int len, void *buffer, | |
143 | const struct ip_vs_iphdr *ipvsh) | |
144 | { | |
145 | return skb_header_pointer(skb, offset, len, buffer); | |
146 | } | |
147 | #endif | |
148 | ||
149 | static inline void | |
150 | ip_vs_fill_ip4hdr(const void *nh, struct ip_vs_iphdr *iphdr) | |
151 | { | |
152 | const struct iphdr *iph = nh; | |
153 | ||
154 | iphdr->len = iph->ihl * 4; | |
155 | iphdr->fragoffs = 0; | |
156 | iphdr->protocol = iph->protocol; | |
157 | iphdr->saddr.ip = iph->saddr; | |
158 | iphdr->daddr.ip = iph->daddr; | |
159 | } | |
160 | ||
161 | /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. | |
162 | * IPv6 requires some extra work, as finding proper header position, | |
163 | * depend on the IPv6 extension headers. | |
164 | */ | |
165 | static inline void | |
166 | ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, struct ip_vs_iphdr *iphdr) | |
167 | { | |
168 | #ifdef CONFIG_IP_VS_IPV6 | |
169 | if (af == AF_INET6) { | |
170 | const struct ipv6hdr *iph = | |
171 | (struct ipv6hdr *)skb_network_header(skb); | |
172 | iphdr->saddr.in6 = iph->saddr; | |
173 | iphdr->daddr.in6 = iph->daddr; | |
174 | /* ipv6_find_hdr() updates len, flags, thoff_reasm */ | |
175 | iphdr->thoff_reasm = 0; | |
176 | iphdr->len = 0; | |
177 | iphdr->flags = 0; | |
178 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
179 | &iphdr->fragoffs, | |
180 | &iphdr->flags); | |
181 | /* get proto from re-assembled packet and it's offset */ | |
182 | if (skb_nfct_reasm(skb)) | |
183 | iphdr->protocol = ipv6_find_hdr(skb_nfct_reasm(skb), | |
184 | &iphdr->thoff_reasm, | |
185 | -1, NULL, NULL); | |
186 | ||
187 | } else | |
188 | #endif | |
189 | { | |
190 | const struct iphdr *iph = | |
191 | (struct iphdr *)skb_network_header(skb); | |
192 | iphdr->len = iph->ihl * 4; | |
193 | iphdr->fragoffs = 0; | |
194 | iphdr->protocol = iph->protocol; | |
195 | iphdr->saddr.ip = iph->saddr; | |
196 | iphdr->daddr.ip = iph->daddr; | |
197 | } | |
198 | } | |
199 | ||
200 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, | |
201 | const union nf_inet_addr *src) | |
202 | { | |
203 | #ifdef CONFIG_IP_VS_IPV6 | |
204 | if (af == AF_INET6) | |
205 | dst->in6 = src->in6; | |
206 | else | |
207 | #endif | |
208 | dst->ip = src->ip; | |
209 | } | |
210 | ||
211 | static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst, | |
212 | const union nf_inet_addr *src) | |
213 | { | |
214 | #ifdef CONFIG_IP_VS_IPV6 | |
215 | if (af == AF_INET6) { | |
216 | dst->in6 = src->in6; | |
217 | return; | |
218 | } | |
219 | #endif | |
220 | dst->ip = src->ip; | |
221 | dst->all[1] = 0; | |
222 | dst->all[2] = 0; | |
223 | dst->all[3] = 0; | |
224 | } | |
225 | ||
226 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, | |
227 | const union nf_inet_addr *b) | |
228 | { | |
229 | #ifdef CONFIG_IP_VS_IPV6 | |
230 | if (af == AF_INET6) | |
231 | return ipv6_addr_equal(&a->in6, &b->in6); | |
232 | #endif | |
233 | return a->ip == b->ip; | |
234 | } | |
235 | ||
236 | #ifdef CONFIG_IP_VS_DEBUG | |
237 | #include <linux/net.h> | |
238 | ||
239 | extern int ip_vs_get_debug_level(void); | |
240 | ||
241 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
242 | const union nf_inet_addr *addr, | |
243 | int *idx) | |
244 | { | |
245 | int len; | |
246 | #ifdef CONFIG_IP_VS_IPV6 | |
247 | if (af == AF_INET6) | |
248 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", | |
249 | &addr->in6) + 1; | |
250 | else | |
251 | #endif | |
252 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", | |
253 | &addr->ip) + 1; | |
254 | ||
255 | *idx += len; | |
256 | BUG_ON(*idx > buf_len + 1); | |
257 | return &buf[*idx - len]; | |
258 | } | |
259 | ||
260 | #define IP_VS_DBG_BUF(level, msg, ...) \ | |
261 | do { \ | |
262 | char ip_vs_dbg_buf[160]; \ | |
263 | int ip_vs_dbg_idx = 0; \ | |
264 | if (level <= ip_vs_get_debug_level()) \ | |
265 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
266 | } while (0) | |
267 | #define IP_VS_ERR_BUF(msg...) \ | |
268 | do { \ | |
269 | char ip_vs_dbg_buf[160]; \ | |
270 | int ip_vs_dbg_idx = 0; \ | |
271 | pr_err(msg); \ | |
272 | } while (0) | |
273 | ||
274 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
275 | #define IP_VS_DBG_ADDR(af, addr) \ | |
276 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
277 | sizeof(ip_vs_dbg_buf), addr, \ | |
278 | &ip_vs_dbg_idx) | |
279 | ||
280 | #define IP_VS_DBG(level, msg, ...) \ | |
281 | do { \ | |
282 | if (level <= ip_vs_get_debug_level()) \ | |
283 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
284 | } while (0) | |
285 | #define IP_VS_DBG_RL(msg, ...) \ | |
286 | do { \ | |
287 | if (net_ratelimit()) \ | |
288 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
289 | } while (0) | |
290 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ | |
291 | do { \ | |
292 | if (level <= ip_vs_get_debug_level()) \ | |
293 | pp->debug_packet(af, pp, skb, ofs, msg); \ | |
294 | } while (0) | |
295 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ | |
296 | do { \ | |
297 | if (level <= ip_vs_get_debug_level() && \ | |
298 | net_ratelimit()) \ | |
299 | pp->debug_packet(af, pp, skb, ofs, msg); \ | |
300 | } while (0) | |
301 | #else /* NO DEBUGGING at ALL */ | |
302 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) | |
303 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
304 | #define IP_VS_DBG(level, msg...) do {} while (0) | |
305 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
306 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
307 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
308 | #endif | |
309 | ||
310 | #define IP_VS_BUG() BUG() | |
311 | #define IP_VS_ERR_RL(msg, ...) \ | |
312 | do { \ | |
313 | if (net_ratelimit()) \ | |
314 | pr_err(msg, ##__VA_ARGS__); \ | |
315 | } while (0) | |
316 | ||
317 | #ifdef CONFIG_IP_VS_DEBUG | |
318 | #define EnterFunction(level) \ | |
319 | do { \ | |
320 | if (level <= ip_vs_get_debug_level()) \ | |
321 | printk(KERN_DEBUG \ | |
322 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
323 | __func__, __FILE__, __LINE__); \ | |
324 | } while (0) | |
325 | #define LeaveFunction(level) \ | |
326 | do { \ | |
327 | if (level <= ip_vs_get_debug_level()) \ | |
328 | printk(KERN_DEBUG \ | |
329 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
330 | __func__, __FILE__, __LINE__); \ | |
331 | } while (0) | |
332 | #else | |
333 | #define EnterFunction(level) do {} while (0) | |
334 | #define LeaveFunction(level) do {} while (0) | |
335 | #endif | |
336 | ||
337 | ||
338 | /* | |
339 | * The port number of FTP service (in network order). | |
340 | */ | |
341 | #define FTPPORT cpu_to_be16(21) | |
342 | #define FTPDATA cpu_to_be16(20) | |
343 | ||
344 | /* | |
345 | * TCP State Values | |
346 | */ | |
347 | enum { | |
348 | IP_VS_TCP_S_NONE = 0, | |
349 | IP_VS_TCP_S_ESTABLISHED, | |
350 | IP_VS_TCP_S_SYN_SENT, | |
351 | IP_VS_TCP_S_SYN_RECV, | |
352 | IP_VS_TCP_S_FIN_WAIT, | |
353 | IP_VS_TCP_S_TIME_WAIT, | |
354 | IP_VS_TCP_S_CLOSE, | |
355 | IP_VS_TCP_S_CLOSE_WAIT, | |
356 | IP_VS_TCP_S_LAST_ACK, | |
357 | IP_VS_TCP_S_LISTEN, | |
358 | IP_VS_TCP_S_SYNACK, | |
359 | IP_VS_TCP_S_LAST | |
360 | }; | |
361 | ||
362 | /* | |
363 | * UDP State Values | |
364 | */ | |
365 | enum { | |
366 | IP_VS_UDP_S_NORMAL, | |
367 | IP_VS_UDP_S_LAST, | |
368 | }; | |
369 | ||
370 | /* | |
371 | * ICMP State Values | |
372 | */ | |
373 | enum { | |
374 | IP_VS_ICMP_S_NORMAL, | |
375 | IP_VS_ICMP_S_LAST, | |
376 | }; | |
377 | ||
378 | /* | |
379 | * SCTP State Values | |
380 | */ | |
381 | enum ip_vs_sctp_states { | |
382 | IP_VS_SCTP_S_NONE, | |
383 | IP_VS_SCTP_S_INIT_CLI, | |
384 | IP_VS_SCTP_S_INIT_SER, | |
385 | IP_VS_SCTP_S_INIT_ACK_CLI, | |
386 | IP_VS_SCTP_S_INIT_ACK_SER, | |
387 | IP_VS_SCTP_S_ECHO_CLI, | |
388 | IP_VS_SCTP_S_ECHO_SER, | |
389 | IP_VS_SCTP_S_ESTABLISHED, | |
390 | IP_VS_SCTP_S_SHUT_CLI, | |
391 | IP_VS_SCTP_S_SHUT_SER, | |
392 | IP_VS_SCTP_S_SHUT_ACK_CLI, | |
393 | IP_VS_SCTP_S_SHUT_ACK_SER, | |
394 | IP_VS_SCTP_S_CLOSED, | |
395 | IP_VS_SCTP_S_LAST | |
396 | }; | |
397 | ||
398 | /* | |
399 | * Delta sequence info structure | |
400 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
401 | * Only used in the VS/NAT. | |
402 | */ | |
403 | struct ip_vs_seq { | |
404 | __u32 init_seq; /* Add delta from this seq */ | |
405 | __u32 delta; /* Delta in sequence numbers */ | |
406 | __u32 previous_delta; /* Delta in sequence numbers | |
407 | before last resized pkt */ | |
408 | }; | |
409 | ||
410 | /* | |
411 | * counters per cpu | |
412 | */ | |
413 | struct ip_vs_counters { | |
414 | __u32 conns; /* connections scheduled */ | |
415 | __u32 inpkts; /* incoming packets */ | |
416 | __u32 outpkts; /* outgoing packets */ | |
417 | __u64 inbytes; /* incoming bytes */ | |
418 | __u64 outbytes; /* outgoing bytes */ | |
419 | }; | |
420 | /* | |
421 | * Stats per cpu | |
422 | */ | |
423 | struct ip_vs_cpu_stats { | |
424 | struct ip_vs_counters ustats; | |
425 | struct u64_stats_sync syncp; | |
426 | }; | |
427 | ||
428 | /* | |
429 | * IPVS statistics objects | |
430 | */ | |
431 | struct ip_vs_estimator { | |
432 | struct list_head list; | |
433 | ||
434 | u64 last_inbytes; | |
435 | u64 last_outbytes; | |
436 | u32 last_conns; | |
437 | u32 last_inpkts; | |
438 | u32 last_outpkts; | |
439 | ||
440 | u32 cps; | |
441 | u32 inpps; | |
442 | u32 outpps; | |
443 | u32 inbps; | |
444 | u32 outbps; | |
445 | }; | |
446 | ||
447 | struct ip_vs_stats { | |
448 | struct ip_vs_stats_user ustats; /* statistics */ | |
449 | struct ip_vs_estimator est; /* estimator */ | |
450 | struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ | |
451 | spinlock_t lock; /* spin lock */ | |
452 | struct ip_vs_stats_user ustats0; /* reset values */ | |
453 | }; | |
454 | ||
455 | struct dst_entry; | |
456 | struct iphdr; | |
457 | struct ip_vs_conn; | |
458 | struct ip_vs_app; | |
459 | struct sk_buff; | |
460 | struct ip_vs_proto_data; | |
461 | ||
462 | struct ip_vs_protocol { | |
463 | struct ip_vs_protocol *next; | |
464 | char *name; | |
465 | u16 protocol; | |
466 | u16 num_states; | |
467 | int dont_defrag; | |
468 | ||
469 | void (*init)(struct ip_vs_protocol *pp); | |
470 | ||
471 | void (*exit)(struct ip_vs_protocol *pp); | |
472 | ||
473 | int (*init_netns)(struct net *net, struct ip_vs_proto_data *pd); | |
474 | ||
475 | void (*exit_netns)(struct net *net, struct ip_vs_proto_data *pd); | |
476 | ||
477 | int (*conn_schedule)(int af, struct sk_buff *skb, | |
478 | struct ip_vs_proto_data *pd, | |
479 | int *verdict, struct ip_vs_conn **cpp, | |
480 | struct ip_vs_iphdr *iph); | |
481 | ||
482 | struct ip_vs_conn * | |
483 | (*conn_in_get)(int af, | |
484 | const struct sk_buff *skb, | |
485 | const struct ip_vs_iphdr *iph, | |
486 | int inverse); | |
487 | ||
488 | struct ip_vs_conn * | |
489 | (*conn_out_get)(int af, | |
490 | const struct sk_buff *skb, | |
491 | const struct ip_vs_iphdr *iph, | |
492 | int inverse); | |
493 | ||
494 | int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
495 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
496 | ||
497 | int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
498 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
499 | ||
500 | int (*csum_check)(int af, struct sk_buff *skb, | |
501 | struct ip_vs_protocol *pp); | |
502 | ||
503 | const char *(*state_name)(int state); | |
504 | ||
505 | void (*state_transition)(struct ip_vs_conn *cp, int direction, | |
506 | const struct sk_buff *skb, | |
507 | struct ip_vs_proto_data *pd); | |
508 | ||
509 | int (*register_app)(struct net *net, struct ip_vs_app *inc); | |
510 | ||
511 | void (*unregister_app)(struct net *net, struct ip_vs_app *inc); | |
512 | ||
513 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
514 | ||
515 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, | |
516 | const struct sk_buff *skb, | |
517 | int offset, | |
518 | const char *msg); | |
519 | ||
520 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); | |
521 | }; | |
522 | ||
523 | /* | |
524 | * protocol data per netns | |
525 | */ | |
526 | struct ip_vs_proto_data { | |
527 | struct ip_vs_proto_data *next; | |
528 | struct ip_vs_protocol *pp; | |
529 | int *timeout_table; /* protocol timeout table */ | |
530 | atomic_t appcnt; /* counter of proto app incs. */ | |
531 | struct tcp_states_t *tcp_state_table; | |
532 | }; | |
533 | ||
534 | extern struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); | |
535 | extern struct ip_vs_proto_data *ip_vs_proto_data_get(struct net *net, | |
536 | unsigned short proto); | |
537 | ||
538 | struct ip_vs_conn_param { | |
539 | struct net *net; | |
540 | const union nf_inet_addr *caddr; | |
541 | const union nf_inet_addr *vaddr; | |
542 | __be16 cport; | |
543 | __be16 vport; | |
544 | __u16 protocol; | |
545 | u16 af; | |
546 | ||
547 | const struct ip_vs_pe *pe; | |
548 | char *pe_data; | |
549 | __u8 pe_data_len; | |
550 | }; | |
551 | ||
552 | /* | |
553 | * IP_VS structure allocated for each dynamically scheduled connection | |
554 | */ | |
555 | struct ip_vs_conn { | |
556 | struct hlist_node c_list; /* hashed list heads */ | |
557 | /* Protocol, addresses and port numbers */ | |
558 | __be16 cport; | |
559 | __be16 dport; | |
560 | __be16 vport; | |
561 | u16 af; /* address family */ | |
562 | union nf_inet_addr caddr; /* client address */ | |
563 | union nf_inet_addr vaddr; /* virtual address */ | |
564 | union nf_inet_addr daddr; /* destination address */ | |
565 | volatile __u32 flags; /* status flags */ | |
566 | __u16 protocol; /* Which protocol (TCP/UDP) */ | |
567 | #ifdef CONFIG_NET_NS | |
568 | struct net *net; /* Name space */ | |
569 | #endif | |
570 | ||
571 | /* counter and timer */ | |
572 | atomic_t refcnt; /* reference count */ | |
573 | struct timer_list timer; /* Expiration timer */ | |
574 | volatile unsigned long timeout; /* timeout */ | |
575 | ||
576 | /* Flags and state transition */ | |
577 | spinlock_t lock; /* lock for state transition */ | |
578 | volatile __u16 state; /* state info */ | |
579 | volatile __u16 old_state; /* old state, to be used for | |
580 | * state transition triggerd | |
581 | * synchronization | |
582 | */ | |
583 | __u32 fwmark; /* Fire wall mark from skb */ | |
584 | unsigned long sync_endtime; /* jiffies + sent_retries */ | |
585 | ||
586 | /* Control members */ | |
587 | struct ip_vs_conn *control; /* Master control connection */ | |
588 | atomic_t n_control; /* Number of controlled ones */ | |
589 | struct ip_vs_dest *dest; /* real server */ | |
590 | atomic_t in_pkts; /* incoming packet counter */ | |
591 | ||
592 | /* packet transmitter for different forwarding methods. If it | |
593 | mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
594 | otherwise this must be changed to a sk_buff **. | |
595 | NF_ACCEPT can be returned when destination is local. | |
596 | */ | |
597 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
598 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
599 | ||
600 | /* Note: we can group the following members into a structure, | |
601 | in order to save more space, and the following members are | |
602 | only used in VS/NAT anyway */ | |
603 | struct ip_vs_app *app; /* bound ip_vs_app object */ | |
604 | void *app_data; /* Application private data */ | |
605 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
606 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
607 | ||
608 | const struct ip_vs_pe *pe; | |
609 | char *pe_data; | |
610 | __u8 pe_data_len; | |
611 | ||
612 | struct rcu_head rcu_head; | |
613 | }; | |
614 | ||
615 | /* | |
616 | * To save some memory in conn table when name space is disabled. | |
617 | */ | |
618 | static inline struct net *ip_vs_conn_net(const struct ip_vs_conn *cp) | |
619 | { | |
620 | #ifdef CONFIG_NET_NS | |
621 | return cp->net; | |
622 | #else | |
623 | return &init_net; | |
624 | #endif | |
625 | } | |
626 | static inline void ip_vs_conn_net_set(struct ip_vs_conn *cp, struct net *net) | |
627 | { | |
628 | #ifdef CONFIG_NET_NS | |
629 | cp->net = net; | |
630 | #endif | |
631 | } | |
632 | ||
633 | static inline int ip_vs_conn_net_eq(const struct ip_vs_conn *cp, | |
634 | struct net *net) | |
635 | { | |
636 | #ifdef CONFIG_NET_NS | |
637 | return cp->net == net; | |
638 | #else | |
639 | return 1; | |
640 | #endif | |
641 | } | |
642 | ||
643 | /* | |
644 | * Extended internal versions of struct ip_vs_service_user and | |
645 | * ip_vs_dest_user for IPv6 support. | |
646 | * | |
647 | * We need these to conveniently pass around service and destination | |
648 | * options, but unfortunately, we also need to keep the old definitions to | |
649 | * maintain userspace backwards compatibility for the setsockopt interface. | |
650 | */ | |
651 | struct ip_vs_service_user_kern { | |
652 | /* virtual service addresses */ | |
653 | u16 af; | |
654 | u16 protocol; | |
655 | union nf_inet_addr addr; /* virtual ip address */ | |
656 | __be16 port; | |
657 | u32 fwmark; /* firwall mark of service */ | |
658 | ||
659 | /* virtual service options */ | |
660 | char *sched_name; | |
661 | char *pe_name; | |
662 | unsigned int flags; /* virtual service flags */ | |
663 | unsigned int timeout; /* persistent timeout in sec */ | |
664 | __be32 netmask; /* persistent netmask or plen */ | |
665 | }; | |
666 | ||
667 | ||
668 | struct ip_vs_dest_user_kern { | |
669 | /* destination server address */ | |
670 | union nf_inet_addr addr; | |
671 | __be16 port; | |
672 | ||
673 | /* real server options */ | |
674 | unsigned int conn_flags; /* connection flags */ | |
675 | int weight; /* destination weight */ | |
676 | ||
677 | /* thresholds for active connections */ | |
678 | u32 u_threshold; /* upper threshold */ | |
679 | u32 l_threshold; /* lower threshold */ | |
680 | }; | |
681 | ||
682 | ||
683 | /* | |
684 | * The information about the virtual service offered to the net | |
685 | * and the forwarding entries | |
686 | */ | |
687 | struct ip_vs_service { | |
688 | struct hlist_node s_list; /* for normal service table */ | |
689 | struct hlist_node f_list; /* for fwmark-based service table */ | |
690 | atomic_t refcnt; /* reference counter */ | |
691 | ||
692 | u16 af; /* address family */ | |
693 | __u16 protocol; /* which protocol (TCP/UDP) */ | |
694 | union nf_inet_addr addr; /* IP address for virtual service */ | |
695 | __be16 port; /* port number for the service */ | |
696 | __u32 fwmark; /* firewall mark of the service */ | |
697 | unsigned int flags; /* service status flags */ | |
698 | unsigned int timeout; /* persistent timeout in ticks */ | |
699 | __be32 netmask; /* grouping granularity, mask/plen */ | |
700 | struct net *net; | |
701 | ||
702 | struct list_head destinations; /* real server d-linked list */ | |
703 | __u32 num_dests; /* number of servers */ | |
704 | struct ip_vs_stats stats; /* statistics for the service */ | |
705 | ||
706 | /* for scheduling */ | |
707 | struct ip_vs_scheduler __rcu *scheduler; /* bound scheduler object */ | |
708 | spinlock_t sched_lock; /* lock sched_data */ | |
709 | void *sched_data; /* scheduler application data */ | |
710 | ||
711 | /* alternate persistence engine */ | |
712 | struct ip_vs_pe __rcu *pe; | |
713 | ||
714 | struct rcu_head rcu_head; | |
715 | }; | |
716 | ||
717 | /* Information for cached dst */ | |
718 | struct ip_vs_dest_dst { | |
719 | struct dst_entry *dst_cache; /* destination cache entry */ | |
720 | u32 dst_cookie; | |
721 | union nf_inet_addr dst_saddr; | |
722 | struct rcu_head rcu_head; | |
723 | }; | |
724 | ||
725 | /* In grace period after removing */ | |
726 | #define IP_VS_DEST_STATE_REMOVING 0x01 | |
727 | /* | |
728 | * The real server destination forwarding entry | |
729 | * with ip address, port number, and so on. | |
730 | */ | |
731 | struct ip_vs_dest { | |
732 | struct list_head n_list; /* for the dests in the service */ | |
733 | struct hlist_node d_list; /* for table with all the dests */ | |
734 | ||
735 | u16 af; /* address family */ | |
736 | __be16 port; /* port number of the server */ | |
737 | union nf_inet_addr addr; /* IP address of the server */ | |
738 | volatile unsigned int flags; /* dest status flags */ | |
739 | atomic_t conn_flags; /* flags to copy to conn */ | |
740 | atomic_t weight; /* server weight */ | |
741 | ||
742 | atomic_t refcnt; /* reference counter */ | |
743 | struct ip_vs_stats stats; /* statistics */ | |
744 | unsigned long state; /* state flags */ | |
745 | ||
746 | /* connection counters and thresholds */ | |
747 | atomic_t activeconns; /* active connections */ | |
748 | atomic_t inactconns; /* inactive connections */ | |
749 | atomic_t persistconns; /* persistent connections */ | |
750 | __u32 u_threshold; /* upper threshold */ | |
751 | __u32 l_threshold; /* lower threshold */ | |
752 | ||
753 | /* for destination cache */ | |
754 | spinlock_t dst_lock; /* lock of dst_cache */ | |
755 | struct ip_vs_dest_dst __rcu *dest_dst; /* cached dst info */ | |
756 | ||
757 | /* for virtual service */ | |
758 | struct ip_vs_service *svc; /* service it belongs to */ | |
759 | __u16 protocol; /* which protocol (TCP/UDP) */ | |
760 | __be16 vport; /* virtual port number */ | |
761 | union nf_inet_addr vaddr; /* virtual IP address */ | |
762 | __u32 vfwmark; /* firewall mark of service */ | |
763 | ||
764 | struct list_head t_list; /* in dest_trash */ | |
765 | struct rcu_head rcu_head; | |
766 | unsigned int in_rs_table:1; /* we are in rs_table */ | |
767 | }; | |
768 | ||
769 | ||
770 | /* | |
771 | * The scheduler object | |
772 | */ | |
773 | struct ip_vs_scheduler { | |
774 | struct list_head n_list; /* d-linked list head */ | |
775 | char *name; /* scheduler name */ | |
776 | atomic_t refcnt; /* reference counter */ | |
777 | struct module *module; /* THIS_MODULE/NULL */ | |
778 | ||
779 | /* scheduler initializing service */ | |
780 | int (*init_service)(struct ip_vs_service *svc); | |
781 | /* scheduling service finish */ | |
782 | void (*done_service)(struct ip_vs_service *svc); | |
783 | /* dest is linked */ | |
784 | int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
785 | /* dest is unlinked */ | |
786 | int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
787 | /* dest is updated */ | |
788 | int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
789 | ||
790 | /* selecting a server from the given service */ | |
791 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
792 | const struct sk_buff *skb, | |
793 | struct ip_vs_iphdr *iph); | |
794 | }; | |
795 | ||
796 | /* The persistence engine object */ | |
797 | struct ip_vs_pe { | |
798 | struct list_head n_list; /* d-linked list head */ | |
799 | char *name; /* scheduler name */ | |
800 | atomic_t refcnt; /* reference counter */ | |
801 | struct module *module; /* THIS_MODULE/NULL */ | |
802 | ||
803 | /* get the connection template, if any */ | |
804 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
805 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
806 | struct ip_vs_conn *ct); | |
807 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
808 | bool inverse); | |
809 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); | |
810 | }; | |
811 | ||
812 | /* | |
813 | * The application module object (a.k.a. app incarnation) | |
814 | */ | |
815 | struct ip_vs_app { | |
816 | struct list_head a_list; /* member in app list */ | |
817 | int type; /* IP_VS_APP_TYPE_xxx */ | |
818 | char *name; /* application module name */ | |
819 | __u16 protocol; | |
820 | struct module *module; /* THIS_MODULE/NULL */ | |
821 | struct list_head incs_list; /* list of incarnations */ | |
822 | ||
823 | /* members for application incarnations */ | |
824 | struct list_head p_list; /* member in proto app list */ | |
825 | struct ip_vs_app *app; /* its real application */ | |
826 | __be16 port; /* port number in net order */ | |
827 | atomic_t usecnt; /* usage counter */ | |
828 | struct rcu_head rcu_head; | |
829 | ||
830 | /* | |
831 | * output hook: Process packet in inout direction, diff set for TCP. | |
832 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
833 | * 2=Mangled but checksum was not updated | |
834 | */ | |
835 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, | |
836 | struct sk_buff *, int *diff); | |
837 | ||
838 | /* | |
839 | * input hook: Process packet in outin direction, diff set for TCP. | |
840 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
841 | * 2=Mangled but checksum was not updated | |
842 | */ | |
843 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, | |
844 | struct sk_buff *, int *diff); | |
845 | ||
846 | /* ip_vs_app initializer */ | |
847 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
848 | ||
849 | /* ip_vs_app finish */ | |
850 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
851 | ||
852 | ||
853 | /* not used now */ | |
854 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
855 | struct ip_vs_protocol *); | |
856 | ||
857 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
858 | ||
859 | int * timeout_table; | |
860 | int * timeouts; | |
861 | int timeouts_size; | |
862 | ||
863 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
864 | int *verdict, struct ip_vs_conn **cpp); | |
865 | ||
866 | struct ip_vs_conn * | |
867 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
868 | const struct iphdr *iph, int inverse); | |
869 | ||
870 | struct ip_vs_conn * | |
871 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
872 | const struct iphdr *iph, int inverse); | |
873 | ||
874 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
875 | const struct sk_buff *skb, | |
876 | struct ip_vs_app *app); | |
877 | ||
878 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
879 | }; | |
880 | ||
881 | struct ipvs_master_sync_state { | |
882 | struct list_head sync_queue; | |
883 | struct ip_vs_sync_buff *sync_buff; | |
884 | unsigned long sync_queue_len; | |
885 | unsigned int sync_queue_delay; | |
886 | struct task_struct *master_thread; | |
887 | struct delayed_work master_wakeup_work; | |
888 | struct netns_ipvs *ipvs; | |
889 | }; | |
890 | ||
891 | /* How much time to keep dests in trash */ | |
892 | #define IP_VS_DEST_TRASH_PERIOD (120 * HZ) | |
893 | ||
894 | /* IPVS in network namespace */ | |
895 | struct netns_ipvs { | |
896 | int gen; /* Generation */ | |
897 | int enable; /* enable like nf_hooks do */ | |
898 | /* | |
899 | * Hash table: for real service lookups | |
900 | */ | |
901 | #define IP_VS_RTAB_BITS 4 | |
902 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
903 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
904 | ||
905 | struct hlist_head rs_table[IP_VS_RTAB_SIZE]; | |
906 | /* ip_vs_app */ | |
907 | struct list_head app_list; | |
908 | /* ip_vs_proto */ | |
909 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
910 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
911 | /* ip_vs_proto_tcp */ | |
912 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
913 | #define TCP_APP_TAB_BITS 4 | |
914 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
915 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
916 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
917 | #endif | |
918 | /* ip_vs_proto_udp */ | |
919 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
920 | #define UDP_APP_TAB_BITS 4 | |
921 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
922 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
923 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
924 | #endif | |
925 | /* ip_vs_proto_sctp */ | |
926 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
927 | #define SCTP_APP_TAB_BITS 4 | |
928 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
929 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
930 | /* Hash table for SCTP application incarnations */ | |
931 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
932 | #endif | |
933 | /* ip_vs_conn */ | |
934 | atomic_t conn_count; /* connection counter */ | |
935 | ||
936 | /* ip_vs_ctl */ | |
937 | struct ip_vs_stats tot_stats; /* Statistics & est. */ | |
938 | ||
939 | int num_services; /* no of virtual services */ | |
940 | ||
941 | /* Trash for destinations */ | |
942 | struct list_head dest_trash; | |
943 | spinlock_t dest_trash_lock; | |
944 | struct timer_list dest_trash_timer; /* expiration timer */ | |
945 | /* Service counters */ | |
946 | atomic_t ftpsvc_counter; | |
947 | atomic_t nullsvc_counter; | |
948 | ||
949 | #ifdef CONFIG_SYSCTL | |
950 | /* 1/rate drop and drop-entry variables */ | |
951 | struct delayed_work defense_work; /* Work handler */ | |
952 | int drop_rate; | |
953 | int drop_counter; | |
954 | atomic_t dropentry; | |
955 | /* locks in ctl.c */ | |
956 | spinlock_t dropentry_lock; /* drop entry handling */ | |
957 | spinlock_t droppacket_lock; /* drop packet handling */ | |
958 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
959 | ||
960 | /* sys-ctl struct */ | |
961 | struct ctl_table_header *sysctl_hdr; | |
962 | struct ctl_table *sysctl_tbl; | |
963 | #endif | |
964 | ||
965 | /* sysctl variables */ | |
966 | int sysctl_amemthresh; | |
967 | int sysctl_am_droprate; | |
968 | int sysctl_drop_entry; | |
969 | int sysctl_drop_packet; | |
970 | int sysctl_secure_tcp; | |
971 | #ifdef CONFIG_IP_VS_NFCT | |
972 | int sysctl_conntrack; | |
973 | #endif | |
974 | int sysctl_snat_reroute; | |
975 | int sysctl_sync_ver; | |
976 | int sysctl_sync_ports; | |
977 | unsigned long sysctl_sync_qlen_max; | |
978 | int sysctl_sync_sock_size; | |
979 | int sysctl_cache_bypass; | |
980 | int sysctl_expire_nodest_conn; | |
981 | int sysctl_expire_quiescent_template; | |
982 | int sysctl_sync_threshold[2]; | |
983 | unsigned int sysctl_sync_refresh_period; | |
984 | int sysctl_sync_retries; | |
985 | int sysctl_nat_icmp_send; | |
986 | int sysctl_pmtu_disc; | |
987 | int sysctl_backup_only; | |
988 | ||
989 | /* ip_vs_lblc */ | |
990 | int sysctl_lblc_expiration; | |
991 | struct ctl_table_header *lblc_ctl_header; | |
992 | struct ctl_table *lblc_ctl_table; | |
993 | /* ip_vs_lblcr */ | |
994 | int sysctl_lblcr_expiration; | |
995 | struct ctl_table_header *lblcr_ctl_header; | |
996 | struct ctl_table *lblcr_ctl_table; | |
997 | /* ip_vs_est */ | |
998 | struct list_head est_list; /* estimator list */ | |
999 | spinlock_t est_lock; | |
1000 | struct timer_list est_timer; /* Estimation timer */ | |
1001 | /* ip_vs_sync */ | |
1002 | spinlock_t sync_lock; | |
1003 | struct ipvs_master_sync_state *ms; | |
1004 | spinlock_t sync_buff_lock; | |
1005 | struct task_struct **backup_threads; | |
1006 | int threads_mask; | |
1007 | int send_mesg_maxlen; | |
1008 | int recv_mesg_maxlen; | |
1009 | volatile int sync_state; | |
1010 | volatile int master_syncid; | |
1011 | volatile int backup_syncid; | |
1012 | struct mutex sync_mutex; | |
1013 | /* multicast interface name */ | |
1014 | char master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
1015 | char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
1016 | /* net name space ptr */ | |
1017 | struct net *net; /* Needed by timer routines */ | |
1018 | }; | |
1019 | ||
1020 | #define DEFAULT_SYNC_THRESHOLD 3 | |
1021 | #define DEFAULT_SYNC_PERIOD 50 | |
1022 | #define DEFAULT_SYNC_VER 1 | |
1023 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) | |
1024 | #define DEFAULT_SYNC_RETRIES 0 | |
1025 | #define IPVS_SYNC_WAKEUP_RATE 8 | |
1026 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
1027 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
1028 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
1029 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) | |
1030 | #define IPVS_SYNC_PORTS_MAX (1 << 6) | |
1031 | ||
1032 | #ifdef CONFIG_SYSCTL | |
1033 | ||
1034 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1035 | { | |
1036 | return ipvs->sysctl_sync_threshold[0]; | |
1037 | } | |
1038 | ||
1039 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1040 | { | |
1041 | return ACCESS_ONCE(ipvs->sysctl_sync_threshold[1]); | |
1042 | } | |
1043 | ||
1044 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
1045 | { | |
1046 | return ACCESS_ONCE(ipvs->sysctl_sync_refresh_period); | |
1047 | } | |
1048 | ||
1049 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1050 | { | |
1051 | return ipvs->sysctl_sync_retries; | |
1052 | } | |
1053 | ||
1054 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) | |
1055 | { | |
1056 | return ipvs->sysctl_sync_ver; | |
1057 | } | |
1058 | ||
1059 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) | |
1060 | { | |
1061 | return ACCESS_ONCE(ipvs->sysctl_sync_ports); | |
1062 | } | |
1063 | ||
1064 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) | |
1065 | { | |
1066 | return ipvs->sysctl_sync_qlen_max; | |
1067 | } | |
1068 | ||
1069 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1070 | { | |
1071 | return ipvs->sysctl_sync_sock_size; | |
1072 | } | |
1073 | ||
1074 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) | |
1075 | { | |
1076 | return ipvs->sysctl_pmtu_disc; | |
1077 | } | |
1078 | ||
1079 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) | |
1080 | { | |
1081 | return ipvs->sync_state & IP_VS_STATE_BACKUP && | |
1082 | ipvs->sysctl_backup_only; | |
1083 | } | |
1084 | ||
1085 | #else | |
1086 | ||
1087 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1088 | { | |
1089 | return DEFAULT_SYNC_THRESHOLD; | |
1090 | } | |
1091 | ||
1092 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1093 | { | |
1094 | return DEFAULT_SYNC_PERIOD; | |
1095 | } | |
1096 | ||
1097 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
1098 | { | |
1099 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1100 | } | |
1101 | ||
1102 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1103 | { | |
1104 | return DEFAULT_SYNC_RETRIES & 3; | |
1105 | } | |
1106 | ||
1107 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) | |
1108 | { | |
1109 | return DEFAULT_SYNC_VER; | |
1110 | } | |
1111 | ||
1112 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) | |
1113 | { | |
1114 | return 1; | |
1115 | } | |
1116 | ||
1117 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) | |
1118 | { | |
1119 | return IPVS_SYNC_QLEN_MAX; | |
1120 | } | |
1121 | ||
1122 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1123 | { | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) | |
1128 | { | |
1129 | return 1; | |
1130 | } | |
1131 | ||
1132 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) | |
1133 | { | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | #endif | |
1138 | ||
1139 | /* | |
1140 | * IPVS core functions | |
1141 | * (from ip_vs_core.c) | |
1142 | */ | |
1143 | extern const char *ip_vs_proto_name(unsigned int proto); | |
1144 | extern void ip_vs_init_hash_table(struct list_head *table, int rows); | |
1145 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) | |
1146 | ||
1147 | #define IP_VS_APP_TYPE_FTP 1 | |
1148 | ||
1149 | /* | |
1150 | * ip_vs_conn handling functions | |
1151 | * (from ip_vs_conn.c) | |
1152 | */ | |
1153 | ||
1154 | enum { | |
1155 | IP_VS_DIR_INPUT = 0, | |
1156 | IP_VS_DIR_OUTPUT, | |
1157 | IP_VS_DIR_INPUT_ONLY, | |
1158 | IP_VS_DIR_LAST, | |
1159 | }; | |
1160 | ||
1161 | static inline void ip_vs_conn_fill_param(struct net *net, int af, int protocol, | |
1162 | const union nf_inet_addr *caddr, | |
1163 | __be16 cport, | |
1164 | const union nf_inet_addr *vaddr, | |
1165 | __be16 vport, | |
1166 | struct ip_vs_conn_param *p) | |
1167 | { | |
1168 | p->net = net; | |
1169 | p->af = af; | |
1170 | p->protocol = protocol; | |
1171 | p->caddr = caddr; | |
1172 | p->cport = cport; | |
1173 | p->vaddr = vaddr; | |
1174 | p->vport = vport; | |
1175 | p->pe = NULL; | |
1176 | p->pe_data = NULL; | |
1177 | } | |
1178 | ||
1179 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); | |
1180 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
1181 | ||
1182 | struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb, | |
1183 | const struct ip_vs_iphdr *iph, | |
1184 | int inverse); | |
1185 | ||
1186 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); | |
1187 | ||
1188 | struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb, | |
1189 | const struct ip_vs_iphdr *iph, | |
1190 | int inverse); | |
1191 | ||
1192 | /* Get reference to gain full access to conn. | |
1193 | * By default, RCU read-side critical sections have access only to | |
1194 | * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference. | |
1195 | */ | |
1196 | static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp) | |
1197 | { | |
1198 | return atomic_inc_not_zero(&cp->refcnt); | |
1199 | } | |
1200 | ||
1201 | /* put back the conn without restarting its timer */ | |
1202 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1203 | { | |
1204 | smp_mb__before_atomic_dec(); | |
1205 | atomic_dec(&cp->refcnt); | |
1206 | } | |
1207 | extern void ip_vs_conn_put(struct ip_vs_conn *cp); | |
1208 | extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); | |
1209 | ||
1210 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, | |
1211 | const union nf_inet_addr *daddr, | |
1212 | __be16 dport, unsigned int flags, | |
1213 | struct ip_vs_dest *dest, __u32 fwmark); | |
1214 | extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp); | |
1215 | ||
1216 | extern const char * ip_vs_state_name(__u16 proto, int state); | |
1217 | ||
1218 | extern void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp); | |
1219 | extern int ip_vs_check_template(struct ip_vs_conn *ct); | |
1220 | extern void ip_vs_random_dropentry(struct net *net); | |
1221 | extern int ip_vs_conn_init(void); | |
1222 | extern void ip_vs_conn_cleanup(void); | |
1223 | ||
1224 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1225 | { | |
1226 | struct ip_vs_conn *ctl_cp = cp->control; | |
1227 | if (!ctl_cp) { | |
1228 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " | |
1229 | "%s:%d to %s:%d\n", | |
1230 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1231 | ntohs(cp->cport), | |
1232 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1233 | ntohs(cp->vport)); | |
1234 | ||
1235 | return; | |
1236 | } | |
1237 | ||
1238 | IP_VS_DBG_BUF(7, "DELeting control for: " | |
1239 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1240 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1241 | ntohs(cp->cport), | |
1242 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1243 | ntohs(ctl_cp->cport)); | |
1244 | ||
1245 | cp->control = NULL; | |
1246 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
1247 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " | |
1248 | "%s:%d to %s:%d\n", | |
1249 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1250 | ntohs(cp->cport), | |
1251 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1252 | ntohs(cp->vport)); | |
1253 | ||
1254 | return; | |
1255 | } | |
1256 | atomic_dec(&ctl_cp->n_control); | |
1257 | } | |
1258 | ||
1259 | static inline void | |
1260 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1261 | { | |
1262 | if (cp->control) { | |
1263 | IP_VS_ERR_BUF("request control ADD for already controlled: " | |
1264 | "%s:%d to %s:%d\n", | |
1265 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1266 | ntohs(cp->cport), | |
1267 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1268 | ntohs(cp->vport)); | |
1269 | ||
1270 | ip_vs_control_del(cp); | |
1271 | } | |
1272 | ||
1273 | IP_VS_DBG_BUF(7, "ADDing control for: " | |
1274 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1275 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1276 | ntohs(cp->cport), | |
1277 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1278 | ntohs(ctl_cp->cport)); | |
1279 | ||
1280 | cp->control = ctl_cp; | |
1281 | atomic_inc(&ctl_cp->n_control); | |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * IPVS netns init & cleanup functions | |
1286 | */ | |
1287 | extern int ip_vs_estimator_net_init(struct net *net); | |
1288 | extern int ip_vs_control_net_init(struct net *net); | |
1289 | extern int ip_vs_protocol_net_init(struct net *net); | |
1290 | extern int ip_vs_app_net_init(struct net *net); | |
1291 | extern int ip_vs_conn_net_init(struct net *net); | |
1292 | extern int ip_vs_sync_net_init(struct net *net); | |
1293 | extern void ip_vs_conn_net_cleanup(struct net *net); | |
1294 | extern void ip_vs_app_net_cleanup(struct net *net); | |
1295 | extern void ip_vs_protocol_net_cleanup(struct net *net); | |
1296 | extern void ip_vs_control_net_cleanup(struct net *net); | |
1297 | extern void ip_vs_estimator_net_cleanup(struct net *net); | |
1298 | extern void ip_vs_sync_net_cleanup(struct net *net); | |
1299 | extern void ip_vs_service_net_cleanup(struct net *net); | |
1300 | ||
1301 | /* | |
1302 | * IPVS application functions | |
1303 | * (from ip_vs_app.c) | |
1304 | */ | |
1305 | #define IP_VS_APP_MAX_PORTS 8 | |
1306 | extern struct ip_vs_app *register_ip_vs_app(struct net *net, | |
1307 | struct ip_vs_app *app); | |
1308 | extern void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app); | |
1309 | extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1310 | extern void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
1311 | extern int register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app, | |
1312 | __u16 proto, __u16 port); | |
1313 | extern int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
1314 | extern void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1315 | ||
1316 | extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); | |
1317 | extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
1318 | ||
1319 | int register_ip_vs_pe(struct ip_vs_pe *pe); | |
1320 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
1321 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); | |
1322 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); | |
1323 | ||
1324 | /* | |
1325 | * Use a #define to avoid all of module.h just for these trivial ops | |
1326 | */ | |
1327 | #define ip_vs_pe_get(pe) \ | |
1328 | if (pe && pe->module) \ | |
1329 | __module_get(pe->module); | |
1330 | ||
1331 | #define ip_vs_pe_put(pe) \ | |
1332 | if (pe && pe->module) \ | |
1333 | module_put(pe->module); | |
1334 | ||
1335 | /* | |
1336 | * IPVS protocol functions (from ip_vs_proto.c) | |
1337 | */ | |
1338 | extern int ip_vs_protocol_init(void); | |
1339 | extern void ip_vs_protocol_cleanup(void); | |
1340 | extern void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); | |
1341 | extern int *ip_vs_create_timeout_table(int *table, int size); | |
1342 | extern int | |
1343 | ip_vs_set_state_timeout(int *table, int num, const char *const *names, | |
1344 | const char *name, int to); | |
1345 | extern void | |
1346 | ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, | |
1347 | const struct sk_buff *skb, | |
1348 | int offset, const char *msg); | |
1349 | ||
1350 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1351 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1352 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1353 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1354 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
1355 | extern struct ip_vs_protocol ip_vs_protocol_sctp; | |
1356 | ||
1357 | /* | |
1358 | * Registering/unregistering scheduler functions | |
1359 | * (from ip_vs_sched.c) | |
1360 | */ | |
1361 | extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1362 | extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1363 | extern int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1364 | struct ip_vs_scheduler *scheduler); | |
1365 | extern void ip_vs_unbind_scheduler(struct ip_vs_service *svc, | |
1366 | struct ip_vs_scheduler *sched); | |
1367 | extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1368 | extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1369 | extern struct ip_vs_conn * | |
1370 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, | |
1371 | struct ip_vs_proto_data *pd, int *ignored, | |
1372 | struct ip_vs_iphdr *iph); | |
1373 | extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, | |
1374 | struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); | |
1375 | ||
1376 | extern void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); | |
1377 | ||
1378 | ||
1379 | /* | |
1380 | * IPVS control data and functions (from ip_vs_ctl.c) | |
1381 | */ | |
1382 | extern struct ip_vs_stats ip_vs_stats; | |
1383 | extern int sysctl_ip_vs_sync_ver; | |
1384 | ||
1385 | extern struct ip_vs_service * | |
1386 | ip_vs_service_find(struct net *net, int af, __u32 fwmark, __u16 protocol, | |
1387 | const union nf_inet_addr *vaddr, __be16 vport); | |
1388 | ||
1389 | extern bool | |
1390 | ip_vs_has_real_service(struct net *net, int af, __u16 protocol, | |
1391 | const union nf_inet_addr *daddr, __be16 dport); | |
1392 | ||
1393 | extern int ip_vs_use_count_inc(void); | |
1394 | extern void ip_vs_use_count_dec(void); | |
1395 | extern int ip_vs_register_nl_ioctl(void); | |
1396 | extern void ip_vs_unregister_nl_ioctl(void); | |
1397 | extern int ip_vs_control_init(void); | |
1398 | extern void ip_vs_control_cleanup(void); | |
1399 | extern struct ip_vs_dest * | |
1400 | ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr, | |
1401 | __be16 dport, const union nf_inet_addr *vaddr, __be16 vport, | |
1402 | __u16 protocol, __u32 fwmark, __u32 flags); | |
1403 | extern void ip_vs_try_bind_dest(struct ip_vs_conn *cp); | |
1404 | ||
1405 | static inline void ip_vs_dest_hold(struct ip_vs_dest *dest) | |
1406 | { | |
1407 | atomic_inc(&dest->refcnt); | |
1408 | } | |
1409 | ||
1410 | static inline void ip_vs_dest_put(struct ip_vs_dest *dest) | |
1411 | { | |
1412 | smp_mb__before_atomic_dec(); | |
1413 | atomic_dec(&dest->refcnt); | |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | * IPVS sync daemon data and function prototypes | |
1418 | * (from ip_vs_sync.c) | |
1419 | */ | |
1420 | extern int start_sync_thread(struct net *net, int state, char *mcast_ifn, | |
1421 | __u8 syncid); | |
1422 | extern int stop_sync_thread(struct net *net, int state); | |
1423 | extern void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp, int pkts); | |
1424 | ||
1425 | ||
1426 | /* | |
1427 | * IPVS rate estimator prototypes (from ip_vs_est.c) | |
1428 | */ | |
1429 | extern void ip_vs_start_estimator(struct net *net, struct ip_vs_stats *stats); | |
1430 | extern void ip_vs_stop_estimator(struct net *net, struct ip_vs_stats *stats); | |
1431 | extern void ip_vs_zero_estimator(struct ip_vs_stats *stats); | |
1432 | extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst, | |
1433 | struct ip_vs_stats *stats); | |
1434 | ||
1435 | /* | |
1436 | * Various IPVS packet transmitters (from ip_vs_xmit.c) | |
1437 | */ | |
1438 | extern int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1439 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1440 | extern int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1441 | struct ip_vs_protocol *pp, | |
1442 | struct ip_vs_iphdr *iph); | |
1443 | extern int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1444 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1445 | extern int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1446 | struct ip_vs_protocol *pp, | |
1447 | struct ip_vs_iphdr *iph); | |
1448 | extern int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1449 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1450 | extern int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1451 | struct ip_vs_protocol *pp, int offset, | |
1452 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
1453 | extern void ip_vs_dest_dst_rcu_free(struct rcu_head *head); | |
1454 | ||
1455 | #ifdef CONFIG_IP_VS_IPV6 | |
1456 | extern int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1457 | struct ip_vs_protocol *pp, | |
1458 | struct ip_vs_iphdr *iph); | |
1459 | extern int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1460 | struct ip_vs_protocol *pp, | |
1461 | struct ip_vs_iphdr *iph); | |
1462 | extern int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1463 | struct ip_vs_protocol *pp, | |
1464 | struct ip_vs_iphdr *iph); | |
1465 | extern int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1466 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1467 | extern int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1468 | struct ip_vs_protocol *pp, int offset, | |
1469 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
1470 | #endif | |
1471 | ||
1472 | #ifdef CONFIG_SYSCTL | |
1473 | /* | |
1474 | * This is a simple mechanism to ignore packets when | |
1475 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1476 | * we start to drop 1/rate of the packets | |
1477 | */ | |
1478 | ||
1479 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) | |
1480 | { | |
1481 | if (!ipvs->drop_rate) | |
1482 | return 0; | |
1483 | if (--ipvs->drop_counter > 0) | |
1484 | return 0; | |
1485 | ipvs->drop_counter = ipvs->drop_rate; | |
1486 | return 1; | |
1487 | } | |
1488 | #else | |
1489 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1490 | #endif | |
1491 | ||
1492 | /* | |
1493 | * ip_vs_fwd_tag returns the forwarding tag of the connection | |
1494 | */ | |
1495 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) | |
1496 | ||
1497 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) | |
1498 | { | |
1499 | char fwd; | |
1500 | ||
1501 | switch (IP_VS_FWD_METHOD(cp)) { | |
1502 | case IP_VS_CONN_F_MASQ: | |
1503 | fwd = 'M'; break; | |
1504 | case IP_VS_CONN_F_LOCALNODE: | |
1505 | fwd = 'L'; break; | |
1506 | case IP_VS_CONN_F_TUNNEL: | |
1507 | fwd = 'T'; break; | |
1508 | case IP_VS_CONN_F_DROUTE: | |
1509 | fwd = 'R'; break; | |
1510 | case IP_VS_CONN_F_BYPASS: | |
1511 | fwd = 'B'; break; | |
1512 | default: | |
1513 | fwd = '?'; break; | |
1514 | } | |
1515 | return fwd; | |
1516 | } | |
1517 | ||
1518 | extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
1519 | struct ip_vs_conn *cp, int dir); | |
1520 | ||
1521 | #ifdef CONFIG_IP_VS_IPV6 | |
1522 | extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
1523 | struct ip_vs_conn *cp, int dir); | |
1524 | #endif | |
1525 | ||
1526 | extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); | |
1527 | ||
1528 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) | |
1529 | { | |
1530 | __be32 diff[2] = { ~old, new }; | |
1531 | ||
1532 | return csum_partial(diff, sizeof(diff), oldsum); | |
1533 | } | |
1534 | ||
1535 | #ifdef CONFIG_IP_VS_IPV6 | |
1536 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1537 | __wsum oldsum) | |
1538 | { | |
1539 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1540 | new[3], new[2], new[1], new[0] }; | |
1541 | ||
1542 | return csum_partial(diff, sizeof(diff), oldsum); | |
1543 | } | |
1544 | #endif | |
1545 | ||
1546 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) | |
1547 | { | |
1548 | __be16 diff[2] = { ~old, new }; | |
1549 | ||
1550 | return csum_partial(diff, sizeof(diff), oldsum); | |
1551 | } | |
1552 | ||
1553 | /* | |
1554 | * Forget current conntrack (unconfirmed) and attach notrack entry | |
1555 | */ | |
1556 | static inline void ip_vs_notrack(struct sk_buff *skb) | |
1557 | { | |
1558 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1559 | enum ip_conntrack_info ctinfo; | |
1560 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); | |
1561 | ||
1562 | if (!ct || !nf_ct_is_untracked(ct)) { | |
1563 | nf_conntrack_put(skb->nfct); | |
1564 | skb->nfct = &nf_ct_untracked_get()->ct_general; | |
1565 | skb->nfctinfo = IP_CT_NEW; | |
1566 | nf_conntrack_get(skb->nfct); | |
1567 | } | |
1568 | #endif | |
1569 | } | |
1570 | ||
1571 | #ifdef CONFIG_IP_VS_NFCT | |
1572 | /* | |
1573 | * Netfilter connection tracking | |
1574 | * (from ip_vs_nfct.c) | |
1575 | */ | |
1576 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) | |
1577 | { | |
1578 | #ifdef CONFIG_SYSCTL | |
1579 | return ipvs->sysctl_conntrack; | |
1580 | #else | |
1581 | return 0; | |
1582 | #endif | |
1583 | } | |
1584 | ||
1585 | extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1586 | int outin); | |
1587 | extern int ip_vs_confirm_conntrack(struct sk_buff *skb); | |
1588 | extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1589 | struct ip_vs_conn *cp, u_int8_t proto, | |
1590 | const __be16 port, int from_rs); | |
1591 | extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
1592 | ||
1593 | #else | |
1594 | ||
1595 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) | |
1596 | { | |
1597 | return 0; | |
1598 | } | |
1599 | ||
1600 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1601 | struct ip_vs_conn *cp, int outin) | |
1602 | { | |
1603 | } | |
1604 | ||
1605 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) | |
1606 | { | |
1607 | return NF_ACCEPT; | |
1608 | } | |
1609 | ||
1610 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1611 | { | |
1612 | } | |
1613 | /* CONFIG_IP_VS_NFCT */ | |
1614 | #endif | |
1615 | ||
1616 | static inline unsigned int | |
1617 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) | |
1618 | { | |
1619 | /* | |
1620 | * We think the overhead of processing active connections is 256 | |
1621 | * times higher than that of inactive connections in average. (This | |
1622 | * 256 times might not be accurate, we will change it later) We | |
1623 | * use the following formula to estimate the overhead now: | |
1624 | * dest->activeconns*256 + dest->inactconns | |
1625 | */ | |
1626 | return (atomic_read(&dest->activeconns) << 8) + | |
1627 | atomic_read(&dest->inactconns); | |
1628 | } | |
1629 | ||
1630 | #endif /* _NET_IP_VS_H */ |