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 JV |
11 | #include <asm/types.h> /* for __uXX types */ |
12 | ||
1da177e4 LT |
13 | #include <linux/list.h> /* for struct list_head */ |
14 | #include <linux/spinlock.h> /* for struct rwlock_t */ | |
60063497 | 15 | #include <linux/atomic.h> /* for struct atomic_t */ |
1da177e4 | 16 | #include <linux/compiler.h> |
14c85021 | 17 | #include <linux/timer.h> |
187f1882 | 18 | #include <linux/bug.h> |
1da177e4 | 19 | |
14c85021 | 20 | #include <net/checksum.h> |
e7ade46a | 21 | #include <linux/netfilter.h> /* for union nf_inet_addr */ |
1668e010 | 22 | #include <linux/ip.h> |
e7ade46a | 23 | #include <linux/ipv6.h> /* for struct ipv6hdr */ |
4e3fd7a0 | 24 | #include <net/ipv6.h> |
54d83efa | 25 | #if IS_ENABLED(CONFIG_IP_VS_IPV6) |
63dca2c0 JDB |
26 | #include <linux/netfilter_ipv6/ip6_tables.h> |
27 | #endif | |
a638e514 | 28 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
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 | */ | |
a0840e2e | 44 | static inline struct net *skb_net(const struct sk_buff *skb) |
fc723250 HS |
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); | |
a09d1977 | 55 | if (skb_dst(skb) && skb_dst(skb)->dev) |
fc723250 HS |
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 | ||
a0840e2e | 72 | static inline struct net *skb_sknet(const struct sk_buff *skb) |
fc723250 HS |
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 | } | |
b17fc996 HS |
93 | /* |
94 | * This one needed for single_open_net since net is stored directly in | |
25985edc | 95 | * private not as a struct i.e. seq_file_net can't be used. |
b17fc996 HS |
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 | } | |
6f7edb48 CB |
105 | |
106 | /* Connections' size value needed by ip_vs_ctl.c */ | |
107 | extern int ip_vs_conn_tab_size; | |
108 | ||
64aae3cb | 109 | struct ip_vs_iphdr { |
63dca2c0 JDB |
110 | __u32 len; /* IPv4 simply where L4 starts |
111 | IPv6 where L4 Transport Header starts */ | |
2f74713d | 112 | __u32 thoff_reasm; /* Transport Header Offset in nfct_reasm skb */ |
63dca2c0 JDB |
113 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ |
114 | __s16 protocol; | |
115 | __s32 flags; | |
64aae3cb JV |
116 | union nf_inet_addr saddr; |
117 | union nf_inet_addr daddr; | |
118 | }; | |
119 | ||
2f74713d JDB |
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 | ||
64aae3cb | 149 | static inline void |
63dca2c0 JDB |
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) | |
64aae3cb JV |
167 | { |
168 | #ifdef CONFIG_IP_VS_IPV6 | |
169 | if (af == AF_INET6) { | |
63dca2c0 JDB |
170 | const struct ipv6hdr *iph = |
171 | (struct ipv6hdr *)skb_network_header(skb); | |
4e3fd7a0 AD |
172 | iphdr->saddr.in6 = iph->saddr; |
173 | iphdr->daddr.in6 = iph->daddr; | |
2f74713d JDB |
174 | /* ipv6_find_hdr() updates len, flags, thoff_reasm */ |
175 | iphdr->thoff_reasm = 0; | |
63dca2c0 JDB |
176 | iphdr->len = 0; |
177 | iphdr->flags = 0; | |
178 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
179 | &iphdr->fragoffs, | |
180 | &iphdr->flags); | |
2f74713d JDB |
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 | ||
64aae3cb JV |
187 | } else |
188 | #endif | |
189 | { | |
63dca2c0 JDB |
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 | /* This function is a faster version of ip_vs_fill_iph_skb(). | |
201 | * Where we only populate {s,d}addr (and avoid calling ipv6_find_hdr()). | |
202 | * This is used by the some of the ip_vs_*_schedule() functions. | |
203 | * (Mostly done to avoid ABI breakage of external schedulers) | |
204 | */ | |
205 | static inline void | |
206 | ip_vs_fill_iph_addr_only(int af, const struct sk_buff *skb, | |
207 | struct ip_vs_iphdr *iphdr) | |
208 | { | |
209 | #ifdef CONFIG_IP_VS_IPV6 | |
210 | if (af == AF_INET6) { | |
211 | const struct ipv6hdr *iph = | |
212 | (struct ipv6hdr *)skb_network_header(skb); | |
213 | iphdr->saddr.in6 = iph->saddr; | |
214 | iphdr->daddr.in6 = iph->daddr; | |
54d83efa | 215 | } else |
63dca2c0 | 216 | #endif |
54d83efa | 217 | { |
63dca2c0 JDB |
218 | const struct iphdr *iph = |
219 | (struct iphdr *)skb_network_header(skb); | |
64aae3cb JV |
220 | iphdr->saddr.ip = iph->saddr; |
221 | iphdr->daddr.ip = iph->daddr; | |
222 | } | |
223 | } | |
224 | ||
225 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, | |
226 | const union nf_inet_addr *src) | |
227 | { | |
228 | #ifdef CONFIG_IP_VS_IPV6 | |
229 | if (af == AF_INET6) | |
4e3fd7a0 | 230 | dst->in6 = src->in6; |
64aae3cb JV |
231 | else |
232 | #endif | |
233 | dst->ip = src->ip; | |
234 | } | |
235 | ||
236 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, | |
237 | const union nf_inet_addr *b) | |
238 | { | |
239 | #ifdef CONFIG_IP_VS_IPV6 | |
240 | if (af == AF_INET6) | |
241 | return ipv6_addr_equal(&a->in6, &b->in6); | |
242 | #endif | |
243 | return a->ip == b->ip; | |
244 | } | |
245 | ||
1da177e4 | 246 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
247 | #include <linux/net.h> |
248 | ||
1da177e4 | 249 | extern int ip_vs_get_debug_level(void); |
c842a3ad JV |
250 | |
251 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
252 | const union nf_inet_addr *addr, | |
253 | int *idx) | |
254 | { | |
255 | int len; | |
256 | #ifdef CONFIG_IP_VS_IPV6 | |
257 | if (af == AF_INET6) | |
120b9c14 | 258 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
0c6ce78a | 259 | &addr->in6) + 1; |
c842a3ad JV |
260 | else |
261 | #endif | |
3685f25d HH |
262 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
263 | &addr->ip) + 1; | |
c842a3ad JV |
264 | |
265 | *idx += len; | |
266 | BUG_ON(*idx > buf_len + 1); | |
267 | return &buf[*idx - len]; | |
268 | } | |
269 | ||
9aada7ac HE |
270 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
271 | do { \ | |
272 | char ip_vs_dbg_buf[160]; \ | |
273 | int ip_vs_dbg_idx = 0; \ | |
274 | if (level <= ip_vs_get_debug_level()) \ | |
275 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
276 | } while (0) | |
277 | #define IP_VS_ERR_BUF(msg...) \ | |
278 | do { \ | |
279 | char ip_vs_dbg_buf[160]; \ | |
280 | int ip_vs_dbg_idx = 0; \ | |
281 | pr_err(msg); \ | |
282 | } while (0) | |
c842a3ad JV |
283 | |
284 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
285 | #define IP_VS_DBG_ADDR(af, addr) \ |
286 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
287 | sizeof(ip_vs_dbg_buf), addr, \ | |
288 | &ip_vs_dbg_idx) | |
289 | ||
290 | #define IP_VS_DBG(level, msg, ...) \ | |
291 | do { \ | |
292 | if (level <= ip_vs_get_debug_level()) \ | |
293 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
294 | } while (0) | |
295 | #define IP_VS_DBG_RL(msg, ...) \ | |
296 | do { \ | |
297 | if (net_ratelimit()) \ | |
298 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
299 | } while (0) | |
0d79641a | 300 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
301 | do { \ |
302 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 303 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 304 | } while (0) |
0d79641a | 305 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
306 | do { \ |
307 | if (level <= ip_vs_get_debug_level() && \ | |
308 | net_ratelimit()) \ | |
0d79641a | 309 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 310 | } while (0) |
1da177e4 | 311 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
312 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
313 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
314 | #define IP_VS_DBG(level, msg...) do {} while (0) |
315 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
316 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
317 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
318 | #endif |
319 | ||
320 | #define IP_VS_BUG() BUG() | |
1e3e238e | 321 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
322 | do { \ |
323 | if (net_ratelimit()) \ | |
1e3e238e | 324 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 325 | } while (0) |
1da177e4 LT |
326 | |
327 | #ifdef CONFIG_IP_VS_DEBUG | |
328 | #define EnterFunction(level) \ | |
9aada7ac HE |
329 | do { \ |
330 | if (level <= ip_vs_get_debug_level()) \ | |
331 | printk(KERN_DEBUG \ | |
332 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
333 | __func__, __FILE__, __LINE__); \ | |
334 | } while (0) | |
335 | #define LeaveFunction(level) \ | |
336 | do { \ | |
337 | if (level <= ip_vs_get_debug_level()) \ | |
338 | printk(KERN_DEBUG \ | |
339 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
340 | __func__, __FILE__, __LINE__); \ | |
341 | } while (0) | |
1da177e4 LT |
342 | #else |
343 | #define EnterFunction(level) do {} while (0) | |
344 | #define LeaveFunction(level) do {} while (0) | |
345 | #endif | |
346 | ||
347 | #define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); } | |
348 | ||
349 | ||
350 | /* | |
351 | * The port number of FTP service (in network order). | |
352 | */ | |
f3a7c66b HH |
353 | #define FTPPORT cpu_to_be16(21) |
354 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 355 | |
1da177e4 LT |
356 | /* |
357 | * TCP State Values | |
358 | */ | |
359 | enum { | |
360 | IP_VS_TCP_S_NONE = 0, | |
361 | IP_VS_TCP_S_ESTABLISHED, | |
362 | IP_VS_TCP_S_SYN_SENT, | |
363 | IP_VS_TCP_S_SYN_RECV, | |
364 | IP_VS_TCP_S_FIN_WAIT, | |
365 | IP_VS_TCP_S_TIME_WAIT, | |
366 | IP_VS_TCP_S_CLOSE, | |
367 | IP_VS_TCP_S_CLOSE_WAIT, | |
368 | IP_VS_TCP_S_LAST_ACK, | |
369 | IP_VS_TCP_S_LISTEN, | |
370 | IP_VS_TCP_S_SYNACK, | |
371 | IP_VS_TCP_S_LAST | |
372 | }; | |
373 | ||
374 | /* | |
375 | * UDP State Values | |
376 | */ | |
377 | enum { | |
378 | IP_VS_UDP_S_NORMAL, | |
379 | IP_VS_UDP_S_LAST, | |
380 | }; | |
381 | ||
382 | /* | |
383 | * ICMP State Values | |
384 | */ | |
385 | enum { | |
386 | IP_VS_ICMP_S_NORMAL, | |
387 | IP_VS_ICMP_S_LAST, | |
388 | }; | |
389 | ||
2906f66a VMR |
390 | /* |
391 | * SCTP State Values | |
392 | */ | |
393 | enum ip_vs_sctp_states { | |
394 | IP_VS_SCTP_S_NONE, | |
395 | IP_VS_SCTP_S_INIT_CLI, | |
396 | IP_VS_SCTP_S_INIT_SER, | |
397 | IP_VS_SCTP_S_INIT_ACK_CLI, | |
398 | IP_VS_SCTP_S_INIT_ACK_SER, | |
399 | IP_VS_SCTP_S_ECHO_CLI, | |
400 | IP_VS_SCTP_S_ECHO_SER, | |
401 | IP_VS_SCTP_S_ESTABLISHED, | |
402 | IP_VS_SCTP_S_SHUT_CLI, | |
403 | IP_VS_SCTP_S_SHUT_SER, | |
404 | IP_VS_SCTP_S_SHUT_ACK_CLI, | |
405 | IP_VS_SCTP_S_SHUT_ACK_SER, | |
406 | IP_VS_SCTP_S_CLOSED, | |
407 | IP_VS_SCTP_S_LAST | |
408 | }; | |
409 | ||
1da177e4 LT |
410 | /* |
411 | * Delta sequence info structure | |
412 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
413 | * Only used in the VS/NAT. | |
414 | */ | |
415 | struct ip_vs_seq { | |
416 | __u32 init_seq; /* Add delta from this seq */ | |
417 | __u32 delta; /* Delta in sequence numbers */ | |
418 | __u32 previous_delta; /* Delta in sequence numbers | |
419 | before last resized pkt */ | |
420 | }; | |
421 | ||
b17fc996 HS |
422 | /* |
423 | * counters per cpu | |
424 | */ | |
425 | struct ip_vs_counters { | |
426 | __u32 conns; /* connections scheduled */ | |
427 | __u32 inpkts; /* incoming packets */ | |
428 | __u32 outpkts; /* outgoing packets */ | |
429 | __u64 inbytes; /* incoming bytes */ | |
430 | __u64 outbytes; /* outgoing bytes */ | |
431 | }; | |
432 | /* | |
433 | * Stats per cpu | |
434 | */ | |
435 | struct ip_vs_cpu_stats { | |
436 | struct ip_vs_counters ustats; | |
437 | struct u64_stats_sync syncp; | |
438 | }; | |
1da177e4 LT |
439 | |
440 | /* | |
3a14a313 | 441 | * IPVS statistics objects |
1da177e4 | 442 | */ |
3a14a313 SW |
443 | struct ip_vs_estimator { |
444 | struct list_head list; | |
445 | ||
446 | u64 last_inbytes; | |
447 | u64 last_outbytes; | |
448 | u32 last_conns; | |
449 | u32 last_inpkts; | |
450 | u32 last_outpkts; | |
451 | ||
452 | u32 cps; | |
453 | u32 inpps; | |
454 | u32 outpps; | |
455 | u32 inbps; | |
456 | u32 outbps; | |
457 | }; | |
458 | ||
fd2c3ef7 | 459 | struct ip_vs_stats { |
b17fc996 | 460 | struct ip_vs_stats_user ustats; /* statistics */ |
e9c0ce23 | 461 | struct ip_vs_estimator est; /* estimator */ |
b962abdc | 462 | struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ |
b17fc996 | 463 | spinlock_t lock; /* spin lock */ |
55a3d4e1 | 464 | struct ip_vs_stats_user ustats0; /* reset values */ |
1da177e4 LT |
465 | }; |
466 | ||
14c85021 ACM |
467 | struct dst_entry; |
468 | struct iphdr; | |
1da177e4 LT |
469 | struct ip_vs_conn; |
470 | struct ip_vs_app; | |
14c85021 | 471 | struct sk_buff; |
252c6410 | 472 | struct ip_vs_proto_data; |
1da177e4 LT |
473 | |
474 | struct ip_vs_protocol { | |
475 | struct ip_vs_protocol *next; | |
476 | char *name; | |
2ad17def JA |
477 | u16 protocol; |
478 | u16 num_states; | |
1da177e4 | 479 | int dont_defrag; |
1da177e4 LT |
480 | |
481 | void (*init)(struct ip_vs_protocol *pp); | |
482 | ||
483 | void (*exit)(struct ip_vs_protocol *pp); | |
484 | ||
582b8e3e | 485 | int (*init_netns)(struct net *net, struct ip_vs_proto_data *pd); |
252c6410 HS |
486 | |
487 | void (*exit_netns)(struct net *net, struct ip_vs_proto_data *pd); | |
488 | ||
51ef348b | 489 | int (*conn_schedule)(int af, struct sk_buff *skb, |
9330419d | 490 | struct ip_vs_proto_data *pd, |
d4383f04 JDB |
491 | int *verdict, struct ip_vs_conn **cpp, |
492 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
493 | |
494 | struct ip_vs_conn * | |
51ef348b JV |
495 | (*conn_in_get)(int af, |
496 | const struct sk_buff *skb, | |
51ef348b | 497 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
498 | int inverse); |
499 | ||
500 | struct ip_vs_conn * | |
51ef348b JV |
501 | (*conn_out_get)(int af, |
502 | const struct sk_buff *skb, | |
51ef348b | 503 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
504 | int inverse); |
505 | ||
d4383f04 JDB |
506 | int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
507 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 508 | |
d4383f04 JDB |
509 | int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
510 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 511 | |
51ef348b JV |
512 | int (*csum_check)(int af, struct sk_buff *skb, |
513 | struct ip_vs_protocol *pp); | |
1da177e4 LT |
514 | |
515 | const char *(*state_name)(int state); | |
516 | ||
4a516f11 SH |
517 | void (*state_transition)(struct ip_vs_conn *cp, int direction, |
518 | const struct sk_buff *skb, | |
519 | struct ip_vs_proto_data *pd); | |
1da177e4 | 520 | |
ab8a5e84 | 521 | int (*register_app)(struct net *net, struct ip_vs_app *inc); |
1da177e4 | 522 | |
ab8a5e84 | 523 | void (*unregister_app)(struct net *net, struct ip_vs_app *inc); |
1da177e4 LT |
524 | |
525 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
526 | ||
0d79641a | 527 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
528 | const struct sk_buff *skb, |
529 | int offset, | |
530 | const char *msg); | |
531 | ||
9330419d | 532 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
1da177e4 LT |
533 | }; |
534 | ||
252c6410 HS |
535 | /* |
536 | * protocol data per netns | |
537 | */ | |
538 | struct ip_vs_proto_data { | |
539 | struct ip_vs_proto_data *next; | |
540 | struct ip_vs_protocol *pp; | |
541 | int *timeout_table; /* protocol timeout table */ | |
542 | atomic_t appcnt; /* counter of proto app incs. */ | |
543 | struct tcp_states_t *tcp_state_table; | |
544 | }; | |
545 | ||
546 | extern struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); | |
547 | extern struct ip_vs_proto_data *ip_vs_proto_data_get(struct net *net, | |
548 | unsigned short proto); | |
1da177e4 | 549 | |
f11017ec | 550 | struct ip_vs_conn_param { |
6e67e586 | 551 | struct net *net; |
f11017ec SH |
552 | const union nf_inet_addr *caddr; |
553 | const union nf_inet_addr *vaddr; | |
554 | __be16 cport; | |
555 | __be16 vport; | |
556 | __u16 protocol; | |
557 | u16 af; | |
85999283 SH |
558 | |
559 | const struct ip_vs_pe *pe; | |
560 | char *pe_data; | |
561 | __u8 pe_data_len; | |
f11017ec SH |
562 | }; |
563 | ||
1da177e4 LT |
564 | /* |
565 | * IP_VS structure allocated for each dynamically scheduled connection | |
566 | */ | |
567 | struct ip_vs_conn { | |
731109e7 | 568 | struct hlist_node c_list; /* hashed list heads */ |
6e67e586 HS |
569 | #ifdef CONFIG_NET_NS |
570 | struct net *net; /* Name space */ | |
571 | #endif | |
1da177e4 | 572 | /* Protocol, addresses and port numbers */ |
6e67e586 HS |
573 | u16 af; /* address family */ |
574 | __be16 cport; | |
575 | __be16 vport; | |
576 | __be16 dport; | |
577 | __u32 fwmark; /* Fire wall mark from skb */ | |
578 | union nf_inet_addr caddr; /* client address */ | |
579 | union nf_inet_addr vaddr; /* virtual address */ | |
580 | union nf_inet_addr daddr; /* destination address */ | |
581 | volatile __u32 flags; /* status flags */ | |
1da177e4 LT |
582 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
583 | ||
584 | /* counter and timer */ | |
585 | atomic_t refcnt; /* reference count */ | |
586 | struct timer_list timer; /* Expiration timer */ | |
587 | volatile unsigned long timeout; /* timeout */ | |
588 | ||
589 | /* Flags and state transition */ | |
590 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 591 | volatile __u16 state; /* state info */ |
efac5276 RB |
592 | volatile __u16 old_state; /* old state, to be used for |
593 | * state transition triggerd | |
594 | * synchronization | |
595 | */ | |
749c42b6 | 596 | unsigned long sync_endtime; /* jiffies + sent_retries */ |
1da177e4 LT |
597 | |
598 | /* Control members */ | |
599 | struct ip_vs_conn *control; /* Master control connection */ | |
600 | atomic_t n_control; /* Number of controlled ones */ | |
601 | struct ip_vs_dest *dest; /* real server */ | |
602 | atomic_t in_pkts; /* incoming packet counter */ | |
603 | ||
604 | /* packet transmitter for different forwarding methods. If it | |
605 | mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
606 | otherwise this must be changed to a sk_buff **. | |
fc604767 | 607 | NF_ACCEPT can be returned when destination is local. |
1da177e4 LT |
608 | */ |
609 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
d4383f04 | 610 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
1da177e4 LT |
611 | |
612 | /* Note: we can group the following members into a structure, | |
613 | in order to save more space, and the following members are | |
614 | only used in VS/NAT anyway */ | |
615 | struct ip_vs_app *app; /* bound ip_vs_app object */ | |
616 | void *app_data; /* Application private data */ | |
617 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
618 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
85999283 | 619 | |
e9e5eee8 | 620 | const struct ip_vs_pe *pe; |
85999283 SH |
621 | char *pe_data; |
622 | __u8 pe_data_len; | |
1da177e4 LT |
623 | }; |
624 | ||
6e67e586 HS |
625 | /* |
626 | * To save some memory in conn table when name space is disabled. | |
627 | */ | |
628 | static inline struct net *ip_vs_conn_net(const struct ip_vs_conn *cp) | |
629 | { | |
630 | #ifdef CONFIG_NET_NS | |
631 | return cp->net; | |
632 | #else | |
633 | return &init_net; | |
634 | #endif | |
635 | } | |
636 | static inline void ip_vs_conn_net_set(struct ip_vs_conn *cp, struct net *net) | |
637 | { | |
638 | #ifdef CONFIG_NET_NS | |
639 | cp->net = net; | |
640 | #endif | |
641 | } | |
642 | ||
643 | static inline int ip_vs_conn_net_eq(const struct ip_vs_conn *cp, | |
644 | struct net *net) | |
645 | { | |
646 | #ifdef CONFIG_NET_NS | |
647 | return cp->net == net; | |
648 | #else | |
649 | return 1; | |
650 | #endif | |
651 | } | |
1da177e4 | 652 | |
c860c6b1 JV |
653 | /* |
654 | * Extended internal versions of struct ip_vs_service_user and | |
655 | * ip_vs_dest_user for IPv6 support. | |
656 | * | |
657 | * We need these to conveniently pass around service and destination | |
658 | * options, but unfortunately, we also need to keep the old definitions to | |
659 | * maintain userspace backwards compatibility for the setsockopt interface. | |
660 | */ | |
661 | struct ip_vs_service_user_kern { | |
662 | /* virtual service addresses */ | |
663 | u16 af; | |
664 | u16 protocol; | |
665 | union nf_inet_addr addr; /* virtual ip address */ | |
666 | u16 port; | |
667 | u32 fwmark; /* firwall mark of service */ | |
668 | ||
669 | /* virtual service options */ | |
670 | char *sched_name; | |
0d1e71b0 | 671 | char *pe_name; |
95c96174 ED |
672 | unsigned int flags; /* virtual service flags */ |
673 | unsigned int timeout; /* persistent timeout in sec */ | |
c860c6b1 JV |
674 | u32 netmask; /* persistent netmask */ |
675 | }; | |
676 | ||
677 | ||
678 | struct ip_vs_dest_user_kern { | |
679 | /* destination server address */ | |
680 | union nf_inet_addr addr; | |
681 | u16 port; | |
682 | ||
683 | /* real server options */ | |
95c96174 | 684 | unsigned int conn_flags; /* connection flags */ |
c860c6b1 JV |
685 | int weight; /* destination weight */ |
686 | ||
687 | /* thresholds for active connections */ | |
688 | u32 u_threshold; /* upper threshold */ | |
689 | u32 l_threshold; /* lower threshold */ | |
690 | }; | |
691 | ||
692 | ||
1da177e4 LT |
693 | /* |
694 | * The information about the virtual service offered to the net | |
695 | * and the forwarding entries | |
696 | */ | |
697 | struct ip_vs_service { | |
698 | struct list_head s_list; /* for normal service table */ | |
699 | struct list_head f_list; /* for fwmark-based service table */ | |
700 | atomic_t refcnt; /* reference counter */ | |
701 | atomic_t usecnt; /* use counter */ | |
702 | ||
e7ade46a | 703 | u16 af; /* address family */ |
1da177e4 | 704 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 705 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 706 | __be16 port; /* port number for the service */ |
1da177e4 | 707 | __u32 fwmark; /* firewall mark of the service */ |
95c96174 ED |
708 | unsigned int flags; /* service status flags */ |
709 | unsigned int timeout; /* persistent timeout in ticks */ | |
014d730d | 710 | __be32 netmask; /* grouping granularity */ |
fc723250 | 711 | struct net *net; |
1da177e4 LT |
712 | |
713 | struct list_head destinations; /* real server d-linked list */ | |
714 | __u32 num_dests; /* number of servers */ | |
715 | struct ip_vs_stats stats; /* statistics for the service */ | |
716 | struct ip_vs_app *inc; /* bind conns to this app inc */ | |
717 | ||
718 | /* for scheduling */ | |
719 | struct ip_vs_scheduler *scheduler; /* bound scheduler object */ | |
720 | rwlock_t sched_lock; /* lock sched_data */ | |
721 | void *sched_data; /* scheduler application data */ | |
85999283 SH |
722 | |
723 | /* alternate persistence engine */ | |
724 | struct ip_vs_pe *pe; | |
1da177e4 LT |
725 | }; |
726 | ||
026ace06 JA |
727 | /* Information for cached dst */ |
728 | struct ip_vs_dest_dst { | |
729 | struct dst_entry *dst_cache; /* destination cache entry */ | |
730 | u32 dst_cookie; | |
731 | union nf_inet_addr dst_saddr; | |
732 | struct rcu_head rcu_head; | |
733 | }; | |
1da177e4 LT |
734 | |
735 | /* | |
736 | * The real server destination forwarding entry | |
737 | * with ip address, port number, and so on. | |
738 | */ | |
739 | struct ip_vs_dest { | |
740 | struct list_head n_list; /* for the dests in the service */ | |
741 | struct list_head d_list; /* for table with all the dests */ | |
742 | ||
e7ade46a | 743 | u16 af; /* address family */ |
014d730d | 744 | __be16 port; /* port number of the server */ |
f2431e6e | 745 | union nf_inet_addr addr; /* IP address of the server */ |
95c96174 | 746 | volatile unsigned int flags; /* dest status flags */ |
1da177e4 LT |
747 | atomic_t conn_flags; /* flags to copy to conn */ |
748 | atomic_t weight; /* server weight */ | |
749 | ||
750 | atomic_t refcnt; /* reference counter */ | |
751 | struct ip_vs_stats stats; /* statistics */ | |
752 | ||
753 | /* connection counters and thresholds */ | |
754 | atomic_t activeconns; /* active connections */ | |
755 | atomic_t inactconns; /* inactive connections */ | |
756 | atomic_t persistconns; /* persistent connections */ | |
757 | __u32 u_threshold; /* upper threshold */ | |
758 | __u32 l_threshold; /* lower threshold */ | |
759 | ||
760 | /* for destination cache */ | |
761 | spinlock_t dst_lock; /* lock of dst_cache */ | |
026ace06 | 762 | struct ip_vs_dest_dst __rcu *dest_dst; /* cached dst info */ |
1da177e4 LT |
763 | |
764 | /* for virtual service */ | |
765 | struct ip_vs_service *svc; /* service it belongs to */ | |
766 | __u16 protocol; /* which protocol (TCP/UDP) */ | |
014d730d | 767 | __be16 vport; /* virtual port number */ |
f2431e6e | 768 | union nf_inet_addr vaddr; /* virtual IP address */ |
1da177e4 LT |
769 | __u32 vfwmark; /* firewall mark of service */ |
770 | }; | |
771 | ||
772 | ||
773 | /* | |
774 | * The scheduler object | |
775 | */ | |
776 | struct ip_vs_scheduler { | |
777 | struct list_head n_list; /* d-linked list head */ | |
778 | char *name; /* scheduler name */ | |
779 | atomic_t refcnt; /* reference counter */ | |
780 | struct module *module; /* THIS_MODULE/NULL */ | |
781 | ||
782 | /* scheduler initializing service */ | |
783 | int (*init_service)(struct ip_vs_service *svc); | |
784 | /* scheduling service finish */ | |
785 | int (*done_service)(struct ip_vs_service *svc); | |
786 | /* scheduler updating service */ | |
787 | int (*update_service)(struct ip_vs_service *svc); | |
788 | ||
789 | /* selecting a server from the given service */ | |
790 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
791 | const struct sk_buff *skb); | |
792 | }; | |
793 | ||
85999283 SH |
794 | /* The persistence engine object */ |
795 | struct ip_vs_pe { | |
796 | struct list_head n_list; /* d-linked list head */ | |
797 | char *name; /* scheduler name */ | |
798 | atomic_t refcnt; /* reference counter */ | |
799 | struct module *module; /* THIS_MODULE/NULL */ | |
800 | ||
801 | /* get the connection template, if any */ | |
802 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
803 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
804 | struct ip_vs_conn *ct); | |
805 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
806 | bool inverse); | |
a3c918ac | 807 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
85999283 | 808 | }; |
1da177e4 LT |
809 | |
810 | /* | |
811 | * The application module object (a.k.a. app incarnation) | |
812 | */ | |
fd2c3ef7 | 813 | struct ip_vs_app { |
1da177e4 LT |
814 | struct list_head a_list; /* member in app list */ |
815 | int type; /* IP_VS_APP_TYPE_xxx */ | |
816 | char *name; /* application module name */ | |
817 | __u16 protocol; | |
818 | struct module *module; /* THIS_MODULE/NULL */ | |
819 | struct list_head incs_list; /* list of incarnations */ | |
820 | ||
821 | /* members for application incarnations */ | |
822 | struct list_head p_list; /* member in proto app list */ | |
823 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 824 | __be16 port; /* port number in net order */ |
1da177e4 | 825 | atomic_t usecnt; /* usage counter */ |
363c97d7 | 826 | struct rcu_head rcu_head; |
1da177e4 | 827 | |
8b27b10f JA |
828 | /* |
829 | * output hook: Process packet in inout direction, diff set for TCP. | |
830 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
831 | * 2=Mangled but checksum was not updated | |
832 | */ | |
1da177e4 | 833 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 834 | struct sk_buff *, int *diff); |
1da177e4 | 835 | |
8b27b10f JA |
836 | /* |
837 | * input hook: Process packet in outin direction, diff set for TCP. | |
838 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
839 | * 2=Mangled but checksum was not updated | |
840 | */ | |
1da177e4 | 841 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 842 | struct sk_buff *, int *diff); |
1da177e4 LT |
843 | |
844 | /* ip_vs_app initializer */ | |
845 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
846 | ||
847 | /* ip_vs_app finish */ | |
848 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
849 | ||
850 | ||
851 | /* not used now */ | |
852 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
853 | struct ip_vs_protocol *); | |
854 | ||
855 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
856 | ||
857 | int * timeout_table; | |
858 | int * timeouts; | |
859 | int timeouts_size; | |
860 | ||
861 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
862 | int *verdict, struct ip_vs_conn **cpp); | |
863 | ||
864 | struct ip_vs_conn * | |
865 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 866 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
867 | |
868 | struct ip_vs_conn * | |
869 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 870 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
871 | |
872 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
873 | const struct sk_buff *skb, | |
874 | struct ip_vs_app *app); | |
875 | ||
876 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
877 | }; | |
878 | ||
f73181c8 PNA |
879 | struct ipvs_master_sync_state { |
880 | struct list_head sync_queue; | |
881 | struct ip_vs_sync_buff *sync_buff; | |
882 | int sync_queue_len; | |
883 | unsigned int sync_queue_delay; | |
884 | struct task_struct *master_thread; | |
885 | struct delayed_work master_wakeup_work; | |
886 | struct netns_ipvs *ipvs; | |
887 | }; | |
888 | ||
2553d064 JA |
889 | /* IPVS in network namespace */ |
890 | struct netns_ipvs { | |
891 | int gen; /* Generation */ | |
7a4f0761 | 892 | int enable; /* enable like nf_hooks do */ |
2553d064 JA |
893 | /* |
894 | * Hash table: for real service lookups | |
895 | */ | |
896 | #define IP_VS_RTAB_BITS 4 | |
897 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
898 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
899 | ||
900 | struct list_head rs_table[IP_VS_RTAB_SIZE]; | |
901 | /* ip_vs_app */ | |
902 | struct list_head app_list; | |
2553d064 JA |
903 | /* ip_vs_proto */ |
904 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
905 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
906 | /* ip_vs_proto_tcp */ | |
907 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
908 | #define TCP_APP_TAB_BITS 4 | |
909 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
910 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
911 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
2553d064 JA |
912 | #endif |
913 | /* ip_vs_proto_udp */ | |
914 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
915 | #define UDP_APP_TAB_BITS 4 | |
916 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
917 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
918 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
2553d064 JA |
919 | #endif |
920 | /* ip_vs_proto_sctp */ | |
921 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
922 | #define SCTP_APP_TAB_BITS 4 | |
923 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
924 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
925 | /* Hash table for SCTP application incarnations */ | |
926 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
2553d064 JA |
927 | #endif |
928 | /* ip_vs_conn */ | |
929 | atomic_t conn_count; /* connection counter */ | |
930 | ||
931 | /* ip_vs_ctl */ | |
2a0751af | 932 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
2553d064 JA |
933 | |
934 | int num_services; /* no of virtual services */ | |
f2247fbd SH |
935 | |
936 | rwlock_t rs_lock; /* real services table */ | |
f2247fbd SH |
937 | /* Trash for destinations */ |
938 | struct list_head dest_trash; | |
939 | /* Service counters */ | |
940 | atomic_t ftpsvc_counter; | |
941 | atomic_t nullsvc_counter; | |
942 | ||
943 | #ifdef CONFIG_SYSCTL | |
2553d064 JA |
944 | /* 1/rate drop and drop-entry variables */ |
945 | struct delayed_work defense_work; /* Work handler */ | |
946 | int drop_rate; | |
947 | int drop_counter; | |
948 | atomic_t dropentry; | |
949 | /* locks in ctl.c */ | |
950 | spinlock_t dropentry_lock; /* drop entry handling */ | |
951 | spinlock_t droppacket_lock; /* drop packet handling */ | |
952 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
953 | |
954 | /* sys-ctl struct */ | |
955 | struct ctl_table_header *sysctl_hdr; | |
956 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
957 | #endif |
958 | ||
2553d064 JA |
959 | /* sysctl variables */ |
960 | int sysctl_amemthresh; | |
961 | int sysctl_am_droprate; | |
962 | int sysctl_drop_entry; | |
963 | int sysctl_drop_packet; | |
964 | int sysctl_secure_tcp; | |
965 | #ifdef CONFIG_IP_VS_NFCT | |
966 | int sysctl_conntrack; | |
967 | #endif | |
968 | int sysctl_snat_reroute; | |
969 | int sysctl_sync_ver; | |
f73181c8 | 970 | int sysctl_sync_ports; |
1c003b15 PNA |
971 | int sysctl_sync_qlen_max; |
972 | int sysctl_sync_sock_size; | |
2553d064 JA |
973 | int sysctl_cache_bypass; |
974 | int sysctl_expire_nodest_conn; | |
975 | int sysctl_expire_quiescent_template; | |
976 | int sysctl_sync_threshold[2]; | |
749c42b6 JA |
977 | unsigned int sysctl_sync_refresh_period; |
978 | int sysctl_sync_retries; | |
2553d064 | 979 | int sysctl_nat_icmp_send; |
3654e611 | 980 | int sysctl_pmtu_disc; |
0c12582f | 981 | int sysctl_backup_only; |
2553d064 JA |
982 | |
983 | /* ip_vs_lblc */ | |
984 | int sysctl_lblc_expiration; | |
985 | struct ctl_table_header *lblc_ctl_header; | |
986 | struct ctl_table *lblc_ctl_table; | |
987 | /* ip_vs_lblcr */ | |
988 | int sysctl_lblcr_expiration; | |
989 | struct ctl_table_header *lblcr_ctl_header; | |
990 | struct ctl_table *lblcr_ctl_table; | |
991 | /* ip_vs_est */ | |
992 | struct list_head est_list; /* estimator list */ | |
993 | spinlock_t est_lock; | |
994 | struct timer_list est_timer; /* Estimation timer */ | |
995 | /* ip_vs_sync */ | |
2553d064 | 996 | spinlock_t sync_lock; |
f73181c8 | 997 | struct ipvs_master_sync_state *ms; |
2553d064 | 998 | spinlock_t sync_buff_lock; |
f73181c8 PNA |
999 | struct task_struct **backup_threads; |
1000 | int threads_mask; | |
2553d064 JA |
1001 | int send_mesg_maxlen; |
1002 | int recv_mesg_maxlen; | |
1003 | volatile int sync_state; | |
1004 | volatile int master_syncid; | |
1005 | volatile int backup_syncid; | |
ae1d48b2 | 1006 | struct mutex sync_mutex; |
2553d064 JA |
1007 | /* multicast interface name */ |
1008 | char master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
1009 | char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
1010 | /* net name space ptr */ | |
1011 | struct net *net; /* Needed by timer routines */ | |
1012 | }; | |
1da177e4 | 1013 | |
59e0350e SH |
1014 | #define DEFAULT_SYNC_THRESHOLD 3 |
1015 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 1016 | #define DEFAULT_SYNC_VER 1 |
749c42b6 JA |
1017 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
1018 | #define DEFAULT_SYNC_RETRIES 0 | |
1c003b15 PNA |
1019 | #define IPVS_SYNC_WAKEUP_RATE 8 |
1020 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
1021 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
1022 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
749c42b6 | 1023 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
f73181c8 | 1024 | #define IPVS_SYNC_PORTS_MAX (1 << 6) |
59e0350e SH |
1025 | |
1026 | #ifdef CONFIG_SYSCTL | |
1027 | ||
1028 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1029 | { | |
1030 | return ipvs->sysctl_sync_threshold[0]; | |
1031 | } | |
1032 | ||
1033 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1034 | { | |
749c42b6 JA |
1035 | return ACCESS_ONCE(ipvs->sysctl_sync_threshold[1]); |
1036 | } | |
1037 | ||
1038 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
1039 | { | |
1040 | return ACCESS_ONCE(ipvs->sysctl_sync_refresh_period); | |
1041 | } | |
1042 | ||
1043 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1044 | { | |
1045 | return ipvs->sysctl_sync_retries; | |
59e0350e SH |
1046 | } |
1047 | ||
7532e8d4 SH |
1048 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1049 | { | |
1050 | return ipvs->sysctl_sync_ver; | |
1051 | } | |
1052 | ||
f73181c8 PNA |
1053 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1054 | { | |
1055 | return ACCESS_ONCE(ipvs->sysctl_sync_ports); | |
1056 | } | |
1057 | ||
1c003b15 PNA |
1058 | static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1059 | { | |
1060 | return ipvs->sysctl_sync_qlen_max; | |
1061 | } | |
1062 | ||
1063 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1064 | { | |
1065 | return ipvs->sysctl_sync_sock_size; | |
1066 | } | |
1067 | ||
3654e611 JA |
1068 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1069 | { | |
1070 | return ipvs->sysctl_pmtu_disc; | |
1071 | } | |
1072 | ||
0c12582f JA |
1073 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1074 | { | |
1075 | return ipvs->sync_state & IP_VS_STATE_BACKUP && | |
1076 | ipvs->sysctl_backup_only; | |
1077 | } | |
1078 | ||
59e0350e SH |
1079 | #else |
1080 | ||
1081 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1082 | { | |
1083 | return DEFAULT_SYNC_THRESHOLD; | |
1084 | } | |
1085 | ||
1086 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1087 | { | |
1088 | return DEFAULT_SYNC_PERIOD; | |
1089 | } | |
1090 | ||
749c42b6 JA |
1091 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
1092 | { | |
1093 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1094 | } | |
1095 | ||
1096 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1097 | { | |
1098 | return DEFAULT_SYNC_RETRIES & 3; | |
1099 | } | |
1100 | ||
7532e8d4 SH |
1101 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1102 | { | |
1103 | return DEFAULT_SYNC_VER; | |
1104 | } | |
1105 | ||
f73181c8 PNA |
1106 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1107 | { | |
1108 | return 1; | |
1109 | } | |
1110 | ||
1c003b15 PNA |
1111 | static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1112 | { | |
1113 | return IPVS_SYNC_QLEN_MAX; | |
1114 | } | |
1115 | ||
1116 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1117 | { | |
1118 | return 0; | |
1119 | } | |
1120 | ||
3654e611 JA |
1121 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1122 | { | |
1123 | return 1; | |
1124 | } | |
1125 | ||
0c12582f JA |
1126 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1127 | { | |
1128 | return 0; | |
1129 | } | |
1130 | ||
59e0350e SH |
1131 | #endif |
1132 | ||
1da177e4 LT |
1133 | /* |
1134 | * IPVS core functions | |
1135 | * (from ip_vs_core.c) | |
1136 | */ | |
95c96174 | 1137 | extern const char *ip_vs_proto_name(unsigned int proto); |
1da177e4 | 1138 | extern void ip_vs_init_hash_table(struct list_head *table, int rows); |
afdd6140 | 1139 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 1140 | |
1da177e4 LT |
1141 | #define IP_VS_APP_TYPE_FTP 1 |
1142 | ||
1143 | /* | |
1144 | * ip_vs_conn handling functions | |
1145 | * (from ip_vs_conn.c) | |
1146 | */ | |
1147 | ||
1da177e4 LT |
1148 | enum { |
1149 | IP_VS_DIR_INPUT = 0, | |
1150 | IP_VS_DIR_OUTPUT, | |
1151 | IP_VS_DIR_INPUT_ONLY, | |
1152 | IP_VS_DIR_LAST, | |
1153 | }; | |
1154 | ||
6e67e586 | 1155 | static inline void ip_vs_conn_fill_param(struct net *net, int af, int protocol, |
f11017ec SH |
1156 | const union nf_inet_addr *caddr, |
1157 | __be16 cport, | |
1158 | const union nf_inet_addr *vaddr, | |
1159 | __be16 vport, | |
1160 | struct ip_vs_conn_param *p) | |
1161 | { | |
6e67e586 | 1162 | p->net = net; |
f11017ec SH |
1163 | p->af = af; |
1164 | p->protocol = protocol; | |
1165 | p->caddr = caddr; | |
1166 | p->cport = cport; | |
1167 | p->vaddr = vaddr; | |
1168 | p->vport = vport; | |
85999283 SH |
1169 | p->pe = NULL; |
1170 | p->pe_data = NULL; | |
f11017ec | 1171 | } |
28364a59 | 1172 | |
f11017ec SH |
1173 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
1174 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 1175 | |
5c0d2374 | 1176 | struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb, |
5c0d2374 | 1177 | const struct ip_vs_iphdr *iph, |
5c0d2374 SH |
1178 | int inverse); |
1179 | ||
f11017ec | 1180 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 1181 | |
5c0d2374 | 1182 | struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb, |
5c0d2374 | 1183 | const struct ip_vs_iphdr *iph, |
5c0d2374 SH |
1184 | int inverse); |
1185 | ||
1da177e4 LT |
1186 | /* put back the conn without restarting its timer */ |
1187 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1188 | { | |
1189 | atomic_dec(&cp->refcnt); | |
1190 | } | |
1191 | extern void ip_vs_conn_put(struct ip_vs_conn *cp); | |
014d730d | 1192 | extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); |
1da177e4 | 1193 | |
f11017ec SH |
1194 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, |
1195 | const union nf_inet_addr *daddr, | |
95c96174 | 1196 | __be16 dport, unsigned int flags, |
0e051e68 | 1197 | struct ip_vs_dest *dest, __u32 fwmark); |
1da177e4 LT |
1198 | extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1199 | ||
1200 | extern const char * ip_vs_state_name(__u16 proto, int state); | |
1201 | ||
4a85b96c | 1202 | extern void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp); |
1da177e4 | 1203 | extern int ip_vs_check_template(struct ip_vs_conn *ct); |
f6340ee0 | 1204 | extern void ip_vs_random_dropentry(struct net *net); |
1da177e4 LT |
1205 | extern int ip_vs_conn_init(void); |
1206 | extern void ip_vs_conn_cleanup(void); | |
1207 | ||
1208 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1209 | { | |
1210 | struct ip_vs_conn *ctl_cp = cp->control; | |
1211 | if (!ctl_cp) { | |
cfc78c5a JV |
1212 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
1213 | "%s:%d to %s:%d\n", | |
1214 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1215 | ntohs(cp->cport), | |
1216 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1217 | ntohs(cp->vport)); | |
1218 | ||
1da177e4 LT |
1219 | return; |
1220 | } | |
1221 | ||
cfc78c5a JV |
1222 | IP_VS_DBG_BUF(7, "DELeting control for: " |
1223 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1224 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1225 | ntohs(cp->cport), | |
1226 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1227 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1228 | |
1229 | cp->control = NULL; | |
1230 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1231 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1232 | "%s:%d to %s:%d\n", | |
1233 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1234 | ntohs(cp->cport), | |
1235 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1236 | ntohs(cp->vport)); | |
1237 | ||
1da177e4 LT |
1238 | return; |
1239 | } | |
1240 | atomic_dec(&ctl_cp->n_control); | |
1241 | } | |
1242 | ||
1243 | static inline void | |
1244 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1245 | { | |
1246 | if (cp->control) { | |
cfc78c5a JV |
1247 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
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 | ||
1da177e4 LT |
1254 | ip_vs_control_del(cp); |
1255 | } | |
1256 | ||
cfc78c5a JV |
1257 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1258 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1259 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1260 | ntohs(cp->cport), | |
1261 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1262 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1263 | |
1264 | cp->control = ctl_cp; | |
1265 | atomic_inc(&ctl_cp->n_control); | |
1266 | } | |
1267 | ||
7a4f0761 HS |
1268 | /* |
1269 | * IPVS netns init & cleanup functions | |
1270 | */ | |
503cf15a HS |
1271 | extern int ip_vs_estimator_net_init(struct net *net); |
1272 | extern int ip_vs_control_net_init(struct net *net); | |
1273 | extern int ip_vs_protocol_net_init(struct net *net); | |
1274 | extern int ip_vs_app_net_init(struct net *net); | |
1275 | extern int ip_vs_conn_net_init(struct net *net); | |
1276 | extern int ip_vs_sync_net_init(struct net *net); | |
1277 | extern void ip_vs_conn_net_cleanup(struct net *net); | |
1278 | extern void ip_vs_app_net_cleanup(struct net *net); | |
1279 | extern void ip_vs_protocol_net_cleanup(struct net *net); | |
1280 | extern void ip_vs_control_net_cleanup(struct net *net); | |
1281 | extern void ip_vs_estimator_net_cleanup(struct net *net); | |
1282 | extern void ip_vs_sync_net_cleanup(struct net *net); | |
1283 | extern void ip_vs_service_net_cleanup(struct net *net); | |
1da177e4 LT |
1284 | |
1285 | /* | |
1286 | * IPVS application functions | |
1287 | * (from ip_vs_app.c) | |
1288 | */ | |
1289 | #define IP_VS_APP_MAX_PORTS 8 | |
be97fdb5 JA |
1290 | extern struct ip_vs_app *register_ip_vs_app(struct net *net, |
1291 | struct ip_vs_app *app); | |
ab8a5e84 | 1292 | extern void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app); |
1da177e4 LT |
1293 | extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
1294 | extern void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
ab8a5e84 HS |
1295 | extern int register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app, |
1296 | __u16 proto, __u16 port); | |
1da177e4 LT |
1297 | extern int ip_vs_app_inc_get(struct ip_vs_app *inc); |
1298 | extern void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1299 | ||
3db05fea HX |
1300 | extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); |
1301 | extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
1da177e4 | 1302 | |
8be67a66 SH |
1303 | void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe); |
1304 | void ip_vs_unbind_pe(struct ip_vs_service *svc); | |
1305 | int register_ip_vs_pe(struct ip_vs_pe *pe); | |
1306 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1307 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1308 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 | 1309 | |
69e7dae4 PG |
1310 | /* |
1311 | * Use a #define to avoid all of module.h just for these trivial ops | |
1312 | */ | |
1313 | #define ip_vs_pe_get(pe) \ | |
1314 | if (pe && pe->module) \ | |
e9e5eee8 | 1315 | __module_get(pe->module); |
e9e5eee8 | 1316 | |
69e7dae4 PG |
1317 | #define ip_vs_pe_put(pe) \ |
1318 | if (pe && pe->module) \ | |
e9e5eee8 | 1319 | module_put(pe->module); |
1da177e4 LT |
1320 | |
1321 | /* | |
1322 | * IPVS protocol functions (from ip_vs_proto.c) | |
1323 | */ | |
1324 | extern int ip_vs_protocol_init(void); | |
1325 | extern void ip_vs_protocol_cleanup(void); | |
9330419d | 1326 | extern void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); |
1da177e4 LT |
1327 | extern int *ip_vs_create_timeout_table(int *table, int size); |
1328 | extern int | |
36cbd3dc JE |
1329 | ip_vs_set_state_timeout(int *table, int num, const char *const *names, |
1330 | const char *name, int to); | |
1da177e4 | 1331 | extern void |
0d79641a JA |
1332 | ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
1333 | const struct sk_buff *skb, | |
1da177e4 LT |
1334 | int offset, const char *msg); |
1335 | ||
1336 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1337 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1338 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1339 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1340 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1341 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 LT |
1342 | |
1343 | /* | |
1344 | * Registering/unregistering scheduler functions | |
1345 | * (from ip_vs_sched.c) | |
1346 | */ | |
1347 | extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1348 | extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1349 | extern int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1350 | struct ip_vs_scheduler *scheduler); | |
1351 | extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc); | |
1352 | extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1353 | extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1354 | extern struct ip_vs_conn * | |
190ecd27 | 1355 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
d4383f04 JDB |
1356 | struct ip_vs_proto_data *pd, int *ignored, |
1357 | struct ip_vs_iphdr *iph); | |
1da177e4 | 1358 | extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
d4383f04 | 1359 | struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); |
1da177e4 | 1360 | |
41ac51ee PS |
1361 | extern void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
1362 | ||
1da177e4 LT |
1363 | |
1364 | /* | |
1365 | * IPVS control data and functions (from ip_vs_ctl.c) | |
1366 | */ | |
1da177e4 | 1367 | extern struct ip_vs_stats ip_vs_stats; |
b880c1f0 | 1368 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 LT |
1369 | |
1370 | extern struct ip_vs_service * | |
fc723250 | 1371 | ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1372 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 LT |
1373 | |
1374 | static inline void ip_vs_service_put(struct ip_vs_service *svc) | |
1375 | { | |
1376 | atomic_dec(&svc->usecnt); | |
1377 | } | |
1378 | ||
1379 | extern struct ip_vs_dest * | |
fc723250 | 1380 | ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol, |
7937df15 JV |
1381 | const union nf_inet_addr *daddr, __be16 dport); |
1382 | ||
1da177e4 LT |
1383 | extern int ip_vs_use_count_inc(void); |
1384 | extern void ip_vs_use_count_dec(void); | |
8537de8a HS |
1385 | extern int ip_vs_register_nl_ioctl(void); |
1386 | extern void ip_vs_unregister_nl_ioctl(void); | |
1da177e4 LT |
1387 | extern int ip_vs_control_init(void); |
1388 | extern void ip_vs_control_cleanup(void); | |
1e356f9c | 1389 | extern struct ip_vs_dest * |
fc723250 HS |
1390 | ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr, |
1391 | __be16 dport, const union nf_inet_addr *vaddr, __be16 vport, | |
52793dbe | 1392 | __u16 protocol, __u32 fwmark, __u32 flags); |
1e356f9c | 1393 | extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 LT |
1394 | |
1395 | ||
1396 | /* | |
1397 | * IPVS sync daemon data and function prototypes | |
1398 | * (from ip_vs_sync.c) | |
1399 | */ | |
f131315f HS |
1400 | extern int start_sync_thread(struct net *net, int state, char *mcast_ifn, |
1401 | __u8 syncid); | |
1402 | extern int stop_sync_thread(struct net *net, int state); | |
749c42b6 | 1403 | extern void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp, int pkts); |
1da177e4 LT |
1404 | |
1405 | ||
1406 | /* | |
1407 | * IPVS rate estimator prototypes (from ip_vs_est.c) | |
1408 | */ | |
6ef757f9 JA |
1409 | extern void ip_vs_start_estimator(struct net *net, struct ip_vs_stats *stats); |
1410 | extern void ip_vs_stop_estimator(struct net *net, struct ip_vs_stats *stats); | |
1da177e4 | 1411 | extern void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
ea9f22cc JA |
1412 | extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst, |
1413 | struct ip_vs_stats *stats); | |
1da177e4 LT |
1414 | |
1415 | /* | |
1416 | * Various IPVS packet transmitters (from ip_vs_xmit.c) | |
1417 | */ | |
d4383f04 JDB |
1418 | extern int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
1419 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1420 | extern int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1421 | struct ip_vs_protocol *pp, | |
1422 | struct ip_vs_iphdr *iph); | |
1423 | extern int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1424 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1425 | extern int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1426 | struct ip_vs_protocol *pp, | |
1427 | struct ip_vs_iphdr *iph); | |
1428 | extern int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1429 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1430 | extern int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1431 | struct ip_vs_protocol *pp, int offset, | |
1432 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
026ace06 | 1433 | extern void ip_vs_dest_dst_rcu_free(struct rcu_head *head); |
1da177e4 | 1434 | |
b3cdd2a7 | 1435 | #ifdef CONFIG_IP_VS_IPV6 |
d4383f04 JDB |
1436 | extern int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
1437 | struct ip_vs_protocol *pp, | |
1438 | struct ip_vs_iphdr *iph); | |
1439 | extern int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1440 | struct ip_vs_protocol *pp, | |
1441 | struct ip_vs_iphdr *iph); | |
1442 | extern int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1443 | struct ip_vs_protocol *pp, | |
1444 | struct ip_vs_iphdr *iph); | |
1445 | extern int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1446 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1447 | extern int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1448 | struct ip_vs_protocol *pp, int offset, | |
1449 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
b3cdd2a7 | 1450 | #endif |
1da177e4 | 1451 | |
3a1bbf18 | 1452 | #ifdef CONFIG_SYSCTL |
1da177e4 LT |
1453 | /* |
1454 | * This is a simple mechanism to ignore packets when | |
1455 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1456 | * we start to drop 1/rate of the packets | |
1457 | */ | |
1da177e4 | 1458 | |
a0840e2e | 1459 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1460 | { |
a0840e2e HS |
1461 | if (!ipvs->drop_rate) |
1462 | return 0; | |
1463 | if (--ipvs->drop_counter > 0) | |
1464 | return 0; | |
1465 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1466 | return 1; |
1467 | } | |
3a1bbf18 SH |
1468 | #else |
1469 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1470 | #endif | |
1da177e4 LT |
1471 | |
1472 | /* | |
1473 | * ip_vs_fwd_tag returns the forwarding tag of the connection | |
1474 | */ | |
1475 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) | |
1476 | ||
732db659 | 1477 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1478 | { |
1479 | char fwd; | |
1480 | ||
1481 | switch (IP_VS_FWD_METHOD(cp)) { | |
1482 | case IP_VS_CONN_F_MASQ: | |
1483 | fwd = 'M'; break; | |
1484 | case IP_VS_CONN_F_LOCALNODE: | |
1485 | fwd = 'L'; break; | |
1486 | case IP_VS_CONN_F_TUNNEL: | |
1487 | fwd = 'T'; break; | |
1488 | case IP_VS_CONN_F_DROUTE: | |
1489 | fwd = 'R'; break; | |
1490 | case IP_VS_CONN_F_BYPASS: | |
1491 | fwd = 'B'; break; | |
1492 | default: | |
1493 | fwd = '?'; break; | |
1494 | } | |
1495 | return fwd; | |
1496 | } | |
1497 | ||
1da177e4 | 1498 | extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
b3cdd2a7 JV |
1499 | struct ip_vs_conn *cp, int dir); |
1500 | ||
1501 | #ifdef CONFIG_IP_VS_IPV6 | |
1502 | extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
1503 | struct ip_vs_conn *cp, int dir); | |
1504 | #endif | |
1da177e4 | 1505 | |
b1550f22 | 1506 | extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1507 | |
f9214b26 | 1508 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1509 | { |
f9214b26 | 1510 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1511 | |
07f0757a | 1512 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1513 | } |
1514 | ||
0bbdd42b JV |
1515 | #ifdef CONFIG_IP_VS_IPV6 |
1516 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1517 | __wsum oldsum) | |
1518 | { | |
1519 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1520 | new[3], new[2], new[1], new[0] }; | |
1521 | ||
07f0757a | 1522 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1523 | } |
1524 | #endif | |
1525 | ||
f9214b26 AV |
1526 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1527 | { | |
1528 | __be16 diff[2] = { ~old, new }; | |
1529 | ||
07f0757a | 1530 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1531 | } |
1532 | ||
cf356d69 JA |
1533 | /* |
1534 | * Forget current conntrack (unconfirmed) and attach notrack entry | |
1535 | */ | |
1536 | static inline void ip_vs_notrack(struct sk_buff *skb) | |
1537 | { | |
1538 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1539 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1540 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 JA |
1541 | |
1542 | if (!ct || !nf_ct_is_untracked(ct)) { | |
9e33ce45 | 1543 | nf_conntrack_put(skb->nfct); |
cf356d69 JA |
1544 | skb->nfct = &nf_ct_untracked_get()->ct_general; |
1545 | skb->nfctinfo = IP_CT_NEW; | |
1546 | nf_conntrack_get(skb->nfct); | |
1547 | } | |
1548 | #endif | |
1549 | } | |
1550 | ||
f4bc17cd JA |
1551 | #ifdef CONFIG_IP_VS_NFCT |
1552 | /* | |
1553 | * Netfilter connection tracking | |
1554 | * (from ip_vs_nfct.c) | |
1555 | */ | |
a0840e2e | 1556 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1557 | { |
a4e2f5a7 | 1558 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1559 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1560 | #else |
1561 | return 0; | |
1562 | #endif | |
f4bc17cd JA |
1563 | } |
1564 | ||
6523ce15 JA |
1565 | extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1566 | int outin); | |
3c2de2ae | 1567 | extern int ip_vs_confirm_conntrack(struct sk_buff *skb); |
f4bc17cd JA |
1568 | extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, |
1569 | struct ip_vs_conn *cp, u_int8_t proto, | |
1570 | const __be16 port, int from_rs); | |
1571 | extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
1572 | ||
1573 | #else | |
1574 | ||
a0840e2e | 1575 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1576 | { |
1577 | return 0; | |
1578 | } | |
1579 | ||
1580 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1581 | struct ip_vs_conn *cp, int outin) | |
1582 | { | |
1583 | } | |
1584 | ||
e23ebf0f | 1585 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
f4bc17cd JA |
1586 | { |
1587 | return NF_ACCEPT; | |
1588 | } | |
1589 | ||
1590 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1591 | { | |
1592 | } | |
1593 | /* CONFIG_IP_VS_NFCT */ | |
1594 | #endif | |
6523ce15 | 1595 | |
b552f7e3 CG |
1596 | static inline unsigned int |
1597 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) | |
1598 | { | |
1599 | /* | |
1600 | * We think the overhead of processing active connections is 256 | |
1601 | * times higher than that of inactive connections in average. (This | |
1602 | * 256 times might not be accurate, we will change it later) We | |
1603 | * use the following formula to estimate the overhead now: | |
1604 | * dest->activeconns*256 + dest->inactconns | |
1605 | */ | |
1606 | return (atomic_read(&dest->activeconns) << 8) + | |
1607 | atomic_read(&dest->inactconns); | |
1608 | } | |
1609 | ||
bc4768eb | 1610 | #endif /* _NET_IP_VS_H */ |