]>
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> |
63dca2c0 JDB |
25 | #if IS_ENABLED(CONFIG_IPV6) |
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 */ | |
112 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ | |
113 | __s16 protocol; | |
114 | __s32 flags; | |
64aae3cb JV |
115 | union nf_inet_addr saddr; |
116 | union nf_inet_addr daddr; | |
117 | }; | |
118 | ||
119 | static inline void | |
63dca2c0 JDB |
120 | ip_vs_fill_ip4hdr(const void *nh, struct ip_vs_iphdr *iphdr) |
121 | { | |
122 | const struct iphdr *iph = nh; | |
123 | ||
124 | iphdr->len = iph->ihl * 4; | |
125 | iphdr->fragoffs = 0; | |
126 | iphdr->protocol = iph->protocol; | |
127 | iphdr->saddr.ip = iph->saddr; | |
128 | iphdr->daddr.ip = iph->daddr; | |
129 | } | |
130 | ||
131 | /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. | |
132 | * IPv6 requires some extra work, as finding proper header position, | |
133 | * depend on the IPv6 extension headers. | |
134 | */ | |
135 | static inline void | |
136 | ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, struct ip_vs_iphdr *iphdr) | |
64aae3cb JV |
137 | { |
138 | #ifdef CONFIG_IP_VS_IPV6 | |
139 | if (af == AF_INET6) { | |
63dca2c0 JDB |
140 | const struct ipv6hdr *iph = |
141 | (struct ipv6hdr *)skb_network_header(skb); | |
4e3fd7a0 AD |
142 | iphdr->saddr.in6 = iph->saddr; |
143 | iphdr->daddr.in6 = iph->daddr; | |
63dca2c0 JDB |
144 | /* ipv6_find_hdr() updates len, flags */ |
145 | iphdr->len = 0; | |
146 | iphdr->flags = 0; | |
147 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
148 | &iphdr->fragoffs, | |
149 | &iphdr->flags); | |
64aae3cb JV |
150 | } else |
151 | #endif | |
152 | { | |
63dca2c0 JDB |
153 | const struct iphdr *iph = |
154 | (struct iphdr *)skb_network_header(skb); | |
155 | iphdr->len = iph->ihl * 4; | |
156 | iphdr->fragoffs = 0; | |
157 | iphdr->protocol = iph->protocol; | |
158 | iphdr->saddr.ip = iph->saddr; | |
159 | iphdr->daddr.ip = iph->daddr; | |
160 | } | |
161 | } | |
162 | ||
163 | /* This function is a faster version of ip_vs_fill_iph_skb(). | |
164 | * Where we only populate {s,d}addr (and avoid calling ipv6_find_hdr()). | |
165 | * This is used by the some of the ip_vs_*_schedule() functions. | |
166 | * (Mostly done to avoid ABI breakage of external schedulers) | |
167 | */ | |
168 | static inline void | |
169 | ip_vs_fill_iph_addr_only(int af, const struct sk_buff *skb, | |
170 | struct ip_vs_iphdr *iphdr) | |
171 | { | |
172 | #ifdef CONFIG_IP_VS_IPV6 | |
173 | if (af == AF_INET6) { | |
174 | const struct ipv6hdr *iph = | |
175 | (struct ipv6hdr *)skb_network_header(skb); | |
176 | iphdr->saddr.in6 = iph->saddr; | |
177 | iphdr->daddr.in6 = iph->daddr; | |
178 | } else { | |
179 | #endif | |
180 | const struct iphdr *iph = | |
181 | (struct iphdr *)skb_network_header(skb); | |
64aae3cb JV |
182 | iphdr->saddr.ip = iph->saddr; |
183 | iphdr->daddr.ip = iph->daddr; | |
184 | } | |
185 | } | |
186 | ||
187 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, | |
188 | const union nf_inet_addr *src) | |
189 | { | |
190 | #ifdef CONFIG_IP_VS_IPV6 | |
191 | if (af == AF_INET6) | |
4e3fd7a0 | 192 | dst->in6 = src->in6; |
64aae3cb JV |
193 | else |
194 | #endif | |
195 | dst->ip = src->ip; | |
196 | } | |
197 | ||
198 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, | |
199 | const union nf_inet_addr *b) | |
200 | { | |
201 | #ifdef CONFIG_IP_VS_IPV6 | |
202 | if (af == AF_INET6) | |
203 | return ipv6_addr_equal(&a->in6, &b->in6); | |
204 | #endif | |
205 | return a->ip == b->ip; | |
206 | } | |
207 | ||
1da177e4 | 208 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
209 | #include <linux/net.h> |
210 | ||
1da177e4 | 211 | extern int ip_vs_get_debug_level(void); |
c842a3ad JV |
212 | |
213 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
214 | const union nf_inet_addr *addr, | |
215 | int *idx) | |
216 | { | |
217 | int len; | |
218 | #ifdef CONFIG_IP_VS_IPV6 | |
219 | if (af == AF_INET6) | |
120b9c14 | 220 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
0c6ce78a | 221 | &addr->in6) + 1; |
c842a3ad JV |
222 | else |
223 | #endif | |
3685f25d HH |
224 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
225 | &addr->ip) + 1; | |
c842a3ad JV |
226 | |
227 | *idx += len; | |
228 | BUG_ON(*idx > buf_len + 1); | |
229 | return &buf[*idx - len]; | |
230 | } | |
231 | ||
9aada7ac HE |
232 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
233 | do { \ | |
234 | char ip_vs_dbg_buf[160]; \ | |
235 | int ip_vs_dbg_idx = 0; \ | |
236 | if (level <= ip_vs_get_debug_level()) \ | |
237 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
238 | } while (0) | |
239 | #define IP_VS_ERR_BUF(msg...) \ | |
240 | do { \ | |
241 | char ip_vs_dbg_buf[160]; \ | |
242 | int ip_vs_dbg_idx = 0; \ | |
243 | pr_err(msg); \ | |
244 | } while (0) | |
c842a3ad JV |
245 | |
246 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
247 | #define IP_VS_DBG_ADDR(af, addr) \ |
248 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
249 | sizeof(ip_vs_dbg_buf), addr, \ | |
250 | &ip_vs_dbg_idx) | |
251 | ||
252 | #define IP_VS_DBG(level, msg, ...) \ | |
253 | do { \ | |
254 | if (level <= ip_vs_get_debug_level()) \ | |
255 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
256 | } while (0) | |
257 | #define IP_VS_DBG_RL(msg, ...) \ | |
258 | do { \ | |
259 | if (net_ratelimit()) \ | |
260 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
261 | } while (0) | |
0d79641a | 262 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
263 | do { \ |
264 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 265 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 266 | } while (0) |
0d79641a | 267 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
268 | do { \ |
269 | if (level <= ip_vs_get_debug_level() && \ | |
270 | net_ratelimit()) \ | |
0d79641a | 271 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 272 | } while (0) |
1da177e4 | 273 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
274 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
275 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
276 | #define IP_VS_DBG(level, msg...) do {} while (0) |
277 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
278 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
279 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
280 | #endif |
281 | ||
282 | #define IP_VS_BUG() BUG() | |
1e3e238e | 283 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
284 | do { \ |
285 | if (net_ratelimit()) \ | |
1e3e238e | 286 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 287 | } while (0) |
1da177e4 LT |
288 | |
289 | #ifdef CONFIG_IP_VS_DEBUG | |
290 | #define EnterFunction(level) \ | |
9aada7ac HE |
291 | do { \ |
292 | if (level <= ip_vs_get_debug_level()) \ | |
293 | printk(KERN_DEBUG \ | |
294 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
295 | __func__, __FILE__, __LINE__); \ | |
296 | } while (0) | |
297 | #define LeaveFunction(level) \ | |
298 | do { \ | |
299 | if (level <= ip_vs_get_debug_level()) \ | |
300 | printk(KERN_DEBUG \ | |
301 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
302 | __func__, __FILE__, __LINE__); \ | |
303 | } while (0) | |
1da177e4 LT |
304 | #else |
305 | #define EnterFunction(level) do {} while (0) | |
306 | #define LeaveFunction(level) do {} while (0) | |
307 | #endif | |
308 | ||
309 | #define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); } | |
310 | ||
311 | ||
312 | /* | |
313 | * The port number of FTP service (in network order). | |
314 | */ | |
f3a7c66b HH |
315 | #define FTPPORT cpu_to_be16(21) |
316 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 317 | |
1da177e4 LT |
318 | /* |
319 | * TCP State Values | |
320 | */ | |
321 | enum { | |
322 | IP_VS_TCP_S_NONE = 0, | |
323 | IP_VS_TCP_S_ESTABLISHED, | |
324 | IP_VS_TCP_S_SYN_SENT, | |
325 | IP_VS_TCP_S_SYN_RECV, | |
326 | IP_VS_TCP_S_FIN_WAIT, | |
327 | IP_VS_TCP_S_TIME_WAIT, | |
328 | IP_VS_TCP_S_CLOSE, | |
329 | IP_VS_TCP_S_CLOSE_WAIT, | |
330 | IP_VS_TCP_S_LAST_ACK, | |
331 | IP_VS_TCP_S_LISTEN, | |
332 | IP_VS_TCP_S_SYNACK, | |
333 | IP_VS_TCP_S_LAST | |
334 | }; | |
335 | ||
336 | /* | |
337 | * UDP State Values | |
338 | */ | |
339 | enum { | |
340 | IP_VS_UDP_S_NORMAL, | |
341 | IP_VS_UDP_S_LAST, | |
342 | }; | |
343 | ||
344 | /* | |
345 | * ICMP State Values | |
346 | */ | |
347 | enum { | |
348 | IP_VS_ICMP_S_NORMAL, | |
349 | IP_VS_ICMP_S_LAST, | |
350 | }; | |
351 | ||
2906f66a VMR |
352 | /* |
353 | * SCTP State Values | |
354 | */ | |
355 | enum ip_vs_sctp_states { | |
356 | IP_VS_SCTP_S_NONE, | |
357 | IP_VS_SCTP_S_INIT_CLI, | |
358 | IP_VS_SCTP_S_INIT_SER, | |
359 | IP_VS_SCTP_S_INIT_ACK_CLI, | |
360 | IP_VS_SCTP_S_INIT_ACK_SER, | |
361 | IP_VS_SCTP_S_ECHO_CLI, | |
362 | IP_VS_SCTP_S_ECHO_SER, | |
363 | IP_VS_SCTP_S_ESTABLISHED, | |
364 | IP_VS_SCTP_S_SHUT_CLI, | |
365 | IP_VS_SCTP_S_SHUT_SER, | |
366 | IP_VS_SCTP_S_SHUT_ACK_CLI, | |
367 | IP_VS_SCTP_S_SHUT_ACK_SER, | |
368 | IP_VS_SCTP_S_CLOSED, | |
369 | IP_VS_SCTP_S_LAST | |
370 | }; | |
371 | ||
1da177e4 LT |
372 | /* |
373 | * Delta sequence info structure | |
374 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
375 | * Only used in the VS/NAT. | |
376 | */ | |
377 | struct ip_vs_seq { | |
378 | __u32 init_seq; /* Add delta from this seq */ | |
379 | __u32 delta; /* Delta in sequence numbers */ | |
380 | __u32 previous_delta; /* Delta in sequence numbers | |
381 | before last resized pkt */ | |
382 | }; | |
383 | ||
b17fc996 HS |
384 | /* |
385 | * counters per cpu | |
386 | */ | |
387 | struct ip_vs_counters { | |
388 | __u32 conns; /* connections scheduled */ | |
389 | __u32 inpkts; /* incoming packets */ | |
390 | __u32 outpkts; /* outgoing packets */ | |
391 | __u64 inbytes; /* incoming bytes */ | |
392 | __u64 outbytes; /* outgoing bytes */ | |
393 | }; | |
394 | /* | |
395 | * Stats per cpu | |
396 | */ | |
397 | struct ip_vs_cpu_stats { | |
398 | struct ip_vs_counters ustats; | |
399 | struct u64_stats_sync syncp; | |
400 | }; | |
1da177e4 LT |
401 | |
402 | /* | |
3a14a313 | 403 | * IPVS statistics objects |
1da177e4 | 404 | */ |
3a14a313 SW |
405 | struct ip_vs_estimator { |
406 | struct list_head list; | |
407 | ||
408 | u64 last_inbytes; | |
409 | u64 last_outbytes; | |
410 | u32 last_conns; | |
411 | u32 last_inpkts; | |
412 | u32 last_outpkts; | |
413 | ||
414 | u32 cps; | |
415 | u32 inpps; | |
416 | u32 outpps; | |
417 | u32 inbps; | |
418 | u32 outbps; | |
419 | }; | |
420 | ||
fd2c3ef7 | 421 | struct ip_vs_stats { |
b17fc996 | 422 | struct ip_vs_stats_user ustats; /* statistics */ |
e9c0ce23 | 423 | struct ip_vs_estimator est; /* estimator */ |
b17fc996 HS |
424 | struct ip_vs_cpu_stats *cpustats; /* per cpu counters */ |
425 | spinlock_t lock; /* spin lock */ | |
55a3d4e1 | 426 | struct ip_vs_stats_user ustats0; /* reset values */ |
1da177e4 LT |
427 | }; |
428 | ||
14c85021 ACM |
429 | struct dst_entry; |
430 | struct iphdr; | |
1da177e4 LT |
431 | struct ip_vs_conn; |
432 | struct ip_vs_app; | |
14c85021 | 433 | struct sk_buff; |
252c6410 | 434 | struct ip_vs_proto_data; |
1da177e4 LT |
435 | |
436 | struct ip_vs_protocol { | |
437 | struct ip_vs_protocol *next; | |
438 | char *name; | |
2ad17def JA |
439 | u16 protocol; |
440 | u16 num_states; | |
1da177e4 | 441 | int dont_defrag; |
1da177e4 LT |
442 | |
443 | void (*init)(struct ip_vs_protocol *pp); | |
444 | ||
445 | void (*exit)(struct ip_vs_protocol *pp); | |
446 | ||
582b8e3e | 447 | int (*init_netns)(struct net *net, struct ip_vs_proto_data *pd); |
252c6410 HS |
448 | |
449 | void (*exit_netns)(struct net *net, struct ip_vs_proto_data *pd); | |
450 | ||
51ef348b | 451 | int (*conn_schedule)(int af, struct sk_buff *skb, |
9330419d | 452 | struct ip_vs_proto_data *pd, |
1da177e4 LT |
453 | int *verdict, struct ip_vs_conn **cpp); |
454 | ||
455 | struct ip_vs_conn * | |
51ef348b JV |
456 | (*conn_in_get)(int af, |
457 | const struct sk_buff *skb, | |
51ef348b | 458 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
459 | unsigned int proto_off, |
460 | int inverse); | |
461 | ||
462 | struct ip_vs_conn * | |
51ef348b JV |
463 | (*conn_out_get)(int af, |
464 | const struct sk_buff *skb, | |
51ef348b | 465 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
466 | unsigned int proto_off, |
467 | int inverse); | |
468 | ||
3db05fea | 469 | int (*snat_handler)(struct sk_buff *skb, |
1da177e4 LT |
470 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
471 | ||
3db05fea | 472 | int (*dnat_handler)(struct sk_buff *skb, |
1da177e4 LT |
473 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
474 | ||
51ef348b JV |
475 | int (*csum_check)(int af, struct sk_buff *skb, |
476 | struct ip_vs_protocol *pp); | |
1da177e4 LT |
477 | |
478 | const char *(*state_name)(int state); | |
479 | ||
4a516f11 SH |
480 | void (*state_transition)(struct ip_vs_conn *cp, int direction, |
481 | const struct sk_buff *skb, | |
482 | struct ip_vs_proto_data *pd); | |
1da177e4 | 483 | |
ab8a5e84 | 484 | int (*register_app)(struct net *net, struct ip_vs_app *inc); |
1da177e4 | 485 | |
ab8a5e84 | 486 | void (*unregister_app)(struct net *net, struct ip_vs_app *inc); |
1da177e4 LT |
487 | |
488 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
489 | ||
0d79641a | 490 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
491 | const struct sk_buff *skb, |
492 | int offset, | |
493 | const char *msg); | |
494 | ||
9330419d | 495 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
1da177e4 LT |
496 | }; |
497 | ||
252c6410 HS |
498 | /* |
499 | * protocol data per netns | |
500 | */ | |
501 | struct ip_vs_proto_data { | |
502 | struct ip_vs_proto_data *next; | |
503 | struct ip_vs_protocol *pp; | |
504 | int *timeout_table; /* protocol timeout table */ | |
505 | atomic_t appcnt; /* counter of proto app incs. */ | |
506 | struct tcp_states_t *tcp_state_table; | |
507 | }; | |
508 | ||
509 | extern struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); | |
510 | extern struct ip_vs_proto_data *ip_vs_proto_data_get(struct net *net, | |
511 | unsigned short proto); | |
1da177e4 | 512 | |
f11017ec | 513 | struct ip_vs_conn_param { |
6e67e586 | 514 | struct net *net; |
f11017ec SH |
515 | const union nf_inet_addr *caddr; |
516 | const union nf_inet_addr *vaddr; | |
517 | __be16 cport; | |
518 | __be16 vport; | |
519 | __u16 protocol; | |
520 | u16 af; | |
85999283 SH |
521 | |
522 | const struct ip_vs_pe *pe; | |
523 | char *pe_data; | |
524 | __u8 pe_data_len; | |
f11017ec SH |
525 | }; |
526 | ||
1da177e4 LT |
527 | /* |
528 | * IP_VS structure allocated for each dynamically scheduled connection | |
529 | */ | |
530 | struct ip_vs_conn { | |
731109e7 | 531 | struct hlist_node c_list; /* hashed list heads */ |
6e67e586 HS |
532 | #ifdef CONFIG_NET_NS |
533 | struct net *net; /* Name space */ | |
534 | #endif | |
1da177e4 | 535 | /* Protocol, addresses and port numbers */ |
6e67e586 HS |
536 | u16 af; /* address family */ |
537 | __be16 cport; | |
538 | __be16 vport; | |
539 | __be16 dport; | |
540 | __u32 fwmark; /* Fire wall mark from skb */ | |
541 | union nf_inet_addr caddr; /* client address */ | |
542 | union nf_inet_addr vaddr; /* virtual address */ | |
543 | union nf_inet_addr daddr; /* destination address */ | |
544 | volatile __u32 flags; /* status flags */ | |
1da177e4 LT |
545 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
546 | ||
547 | /* counter and timer */ | |
548 | atomic_t refcnt; /* reference count */ | |
549 | struct timer_list timer; /* Expiration timer */ | |
550 | volatile unsigned long timeout; /* timeout */ | |
551 | ||
552 | /* Flags and state transition */ | |
553 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 554 | volatile __u16 state; /* state info */ |
efac5276 RB |
555 | volatile __u16 old_state; /* old state, to be used for |
556 | * state transition triggerd | |
557 | * synchronization | |
558 | */ | |
749c42b6 | 559 | unsigned long sync_endtime; /* jiffies + sent_retries */ |
1da177e4 LT |
560 | |
561 | /* Control members */ | |
562 | struct ip_vs_conn *control; /* Master control connection */ | |
563 | atomic_t n_control; /* Number of controlled ones */ | |
564 | struct ip_vs_dest *dest; /* real server */ | |
565 | atomic_t in_pkts; /* incoming packet counter */ | |
566 | ||
567 | /* packet transmitter for different forwarding methods. If it | |
568 | mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
569 | otherwise this must be changed to a sk_buff **. | |
fc604767 | 570 | NF_ACCEPT can be returned when destination is local. |
1da177e4 LT |
571 | */ |
572 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
573 | struct ip_vs_protocol *pp); | |
574 | ||
575 | /* Note: we can group the following members into a structure, | |
576 | in order to save more space, and the following members are | |
577 | only used in VS/NAT anyway */ | |
578 | struct ip_vs_app *app; /* bound ip_vs_app object */ | |
579 | void *app_data; /* Application private data */ | |
580 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
581 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
85999283 | 582 | |
e9e5eee8 | 583 | const struct ip_vs_pe *pe; |
85999283 SH |
584 | char *pe_data; |
585 | __u8 pe_data_len; | |
1da177e4 LT |
586 | }; |
587 | ||
6e67e586 HS |
588 | /* |
589 | * To save some memory in conn table when name space is disabled. | |
590 | */ | |
591 | static inline struct net *ip_vs_conn_net(const struct ip_vs_conn *cp) | |
592 | { | |
593 | #ifdef CONFIG_NET_NS | |
594 | return cp->net; | |
595 | #else | |
596 | return &init_net; | |
597 | #endif | |
598 | } | |
599 | static inline void ip_vs_conn_net_set(struct ip_vs_conn *cp, struct net *net) | |
600 | { | |
601 | #ifdef CONFIG_NET_NS | |
602 | cp->net = net; | |
603 | #endif | |
604 | } | |
605 | ||
606 | static inline int ip_vs_conn_net_eq(const struct ip_vs_conn *cp, | |
607 | struct net *net) | |
608 | { | |
609 | #ifdef CONFIG_NET_NS | |
610 | return cp->net == net; | |
611 | #else | |
612 | return 1; | |
613 | #endif | |
614 | } | |
1da177e4 | 615 | |
c860c6b1 JV |
616 | /* |
617 | * Extended internal versions of struct ip_vs_service_user and | |
618 | * ip_vs_dest_user for IPv6 support. | |
619 | * | |
620 | * We need these to conveniently pass around service and destination | |
621 | * options, but unfortunately, we also need to keep the old definitions to | |
622 | * maintain userspace backwards compatibility for the setsockopt interface. | |
623 | */ | |
624 | struct ip_vs_service_user_kern { | |
625 | /* virtual service addresses */ | |
626 | u16 af; | |
627 | u16 protocol; | |
628 | union nf_inet_addr addr; /* virtual ip address */ | |
629 | u16 port; | |
630 | u32 fwmark; /* firwall mark of service */ | |
631 | ||
632 | /* virtual service options */ | |
633 | char *sched_name; | |
0d1e71b0 | 634 | char *pe_name; |
95c96174 ED |
635 | unsigned int flags; /* virtual service flags */ |
636 | unsigned int timeout; /* persistent timeout in sec */ | |
c860c6b1 JV |
637 | u32 netmask; /* persistent netmask */ |
638 | }; | |
639 | ||
640 | ||
641 | struct ip_vs_dest_user_kern { | |
642 | /* destination server address */ | |
643 | union nf_inet_addr addr; | |
644 | u16 port; | |
645 | ||
646 | /* real server options */ | |
95c96174 | 647 | unsigned int conn_flags; /* connection flags */ |
c860c6b1 JV |
648 | int weight; /* destination weight */ |
649 | ||
650 | /* thresholds for active connections */ | |
651 | u32 u_threshold; /* upper threshold */ | |
652 | u32 l_threshold; /* lower threshold */ | |
653 | }; | |
654 | ||
655 | ||
1da177e4 LT |
656 | /* |
657 | * The information about the virtual service offered to the net | |
658 | * and the forwarding entries | |
659 | */ | |
660 | struct ip_vs_service { | |
661 | struct list_head s_list; /* for normal service table */ | |
662 | struct list_head f_list; /* for fwmark-based service table */ | |
663 | atomic_t refcnt; /* reference counter */ | |
664 | atomic_t usecnt; /* use counter */ | |
665 | ||
e7ade46a | 666 | u16 af; /* address family */ |
1da177e4 | 667 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 668 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 669 | __be16 port; /* port number for the service */ |
1da177e4 | 670 | __u32 fwmark; /* firewall mark of the service */ |
95c96174 ED |
671 | unsigned int flags; /* service status flags */ |
672 | unsigned int timeout; /* persistent timeout in ticks */ | |
014d730d | 673 | __be32 netmask; /* grouping granularity */ |
fc723250 | 674 | struct net *net; |
1da177e4 LT |
675 | |
676 | struct list_head destinations; /* real server d-linked list */ | |
677 | __u32 num_dests; /* number of servers */ | |
678 | struct ip_vs_stats stats; /* statistics for the service */ | |
679 | struct ip_vs_app *inc; /* bind conns to this app inc */ | |
680 | ||
681 | /* for scheduling */ | |
682 | struct ip_vs_scheduler *scheduler; /* bound scheduler object */ | |
683 | rwlock_t sched_lock; /* lock sched_data */ | |
684 | void *sched_data; /* scheduler application data */ | |
85999283 SH |
685 | |
686 | /* alternate persistence engine */ | |
687 | struct ip_vs_pe *pe; | |
1da177e4 LT |
688 | }; |
689 | ||
690 | ||
691 | /* | |
692 | * The real server destination forwarding entry | |
693 | * with ip address, port number, and so on. | |
694 | */ | |
695 | struct ip_vs_dest { | |
696 | struct list_head n_list; /* for the dests in the service */ | |
697 | struct list_head d_list; /* for table with all the dests */ | |
698 | ||
e7ade46a | 699 | u16 af; /* address family */ |
014d730d | 700 | __be16 port; /* port number of the server */ |
f2431e6e | 701 | union nf_inet_addr addr; /* IP address of the server */ |
95c96174 | 702 | volatile unsigned int flags; /* dest status flags */ |
1da177e4 LT |
703 | atomic_t conn_flags; /* flags to copy to conn */ |
704 | atomic_t weight; /* server weight */ | |
705 | ||
706 | atomic_t refcnt; /* reference counter */ | |
707 | struct ip_vs_stats stats; /* statistics */ | |
708 | ||
709 | /* connection counters and thresholds */ | |
710 | atomic_t activeconns; /* active connections */ | |
711 | atomic_t inactconns; /* inactive connections */ | |
712 | atomic_t persistconns; /* persistent connections */ | |
713 | __u32 u_threshold; /* upper threshold */ | |
714 | __u32 l_threshold; /* lower threshold */ | |
715 | ||
716 | /* for destination cache */ | |
717 | spinlock_t dst_lock; /* lock of dst_cache */ | |
718 | struct dst_entry *dst_cache; /* destination cache entry */ | |
719 | u32 dst_rtos; /* RT_TOS(tos) for dst */ | |
714f095f | 720 | u32 dst_cookie; |
c92f5ca2 | 721 | union nf_inet_addr dst_saddr; |
1da177e4 LT |
722 | |
723 | /* for virtual service */ | |
724 | struct ip_vs_service *svc; /* service it belongs to */ | |
725 | __u16 protocol; /* which protocol (TCP/UDP) */ | |
014d730d | 726 | __be16 vport; /* virtual port number */ |
f2431e6e | 727 | union nf_inet_addr vaddr; /* virtual IP address */ |
1da177e4 LT |
728 | __u32 vfwmark; /* firewall mark of service */ |
729 | }; | |
730 | ||
731 | ||
732 | /* | |
733 | * The scheduler object | |
734 | */ | |
735 | struct ip_vs_scheduler { | |
736 | struct list_head n_list; /* d-linked list head */ | |
737 | char *name; /* scheduler name */ | |
738 | atomic_t refcnt; /* reference counter */ | |
739 | struct module *module; /* THIS_MODULE/NULL */ | |
740 | ||
741 | /* scheduler initializing service */ | |
742 | int (*init_service)(struct ip_vs_service *svc); | |
743 | /* scheduling service finish */ | |
744 | int (*done_service)(struct ip_vs_service *svc); | |
745 | /* scheduler updating service */ | |
746 | int (*update_service)(struct ip_vs_service *svc); | |
747 | ||
748 | /* selecting a server from the given service */ | |
749 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
750 | const struct sk_buff *skb); | |
751 | }; | |
752 | ||
85999283 SH |
753 | /* The persistence engine object */ |
754 | struct ip_vs_pe { | |
755 | struct list_head n_list; /* d-linked list head */ | |
756 | char *name; /* scheduler name */ | |
757 | atomic_t refcnt; /* reference counter */ | |
758 | struct module *module; /* THIS_MODULE/NULL */ | |
759 | ||
760 | /* get the connection template, if any */ | |
761 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
762 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
763 | struct ip_vs_conn *ct); | |
764 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
765 | bool inverse); | |
a3c918ac | 766 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
85999283 | 767 | }; |
1da177e4 LT |
768 | |
769 | /* | |
770 | * The application module object (a.k.a. app incarnation) | |
771 | */ | |
fd2c3ef7 | 772 | struct ip_vs_app { |
1da177e4 LT |
773 | struct list_head a_list; /* member in app list */ |
774 | int type; /* IP_VS_APP_TYPE_xxx */ | |
775 | char *name; /* application module name */ | |
776 | __u16 protocol; | |
777 | struct module *module; /* THIS_MODULE/NULL */ | |
778 | struct list_head incs_list; /* list of incarnations */ | |
779 | ||
780 | /* members for application incarnations */ | |
781 | struct list_head p_list; /* member in proto app list */ | |
782 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 783 | __be16 port; /* port number in net order */ |
1da177e4 LT |
784 | atomic_t usecnt; /* usage counter */ |
785 | ||
8b27b10f JA |
786 | /* |
787 | * output hook: Process packet in inout direction, diff set for TCP. | |
788 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
789 | * 2=Mangled but checksum was not updated | |
790 | */ | |
1da177e4 | 791 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 792 | struct sk_buff *, int *diff); |
1da177e4 | 793 | |
8b27b10f JA |
794 | /* |
795 | * input hook: Process packet in outin direction, diff set for TCP. | |
796 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
797 | * 2=Mangled but checksum was not updated | |
798 | */ | |
1da177e4 | 799 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 800 | struct sk_buff *, int *diff); |
1da177e4 LT |
801 | |
802 | /* ip_vs_app initializer */ | |
803 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
804 | ||
805 | /* ip_vs_app finish */ | |
806 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
807 | ||
808 | ||
809 | /* not used now */ | |
810 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
811 | struct ip_vs_protocol *); | |
812 | ||
813 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
814 | ||
815 | int * timeout_table; | |
816 | int * timeouts; | |
817 | int timeouts_size; | |
818 | ||
819 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
820 | int *verdict, struct ip_vs_conn **cpp); | |
821 | ||
822 | struct ip_vs_conn * | |
823 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
824 | const struct iphdr *iph, unsigned int proto_off, | |
825 | int inverse); | |
826 | ||
827 | struct ip_vs_conn * | |
828 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
829 | const struct iphdr *iph, unsigned int proto_off, | |
830 | int inverse); | |
831 | ||
832 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
833 | const struct sk_buff *skb, | |
834 | struct ip_vs_app *app); | |
835 | ||
836 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
837 | }; | |
838 | ||
f73181c8 PNA |
839 | struct ipvs_master_sync_state { |
840 | struct list_head sync_queue; | |
841 | struct ip_vs_sync_buff *sync_buff; | |
842 | int sync_queue_len; | |
843 | unsigned int sync_queue_delay; | |
844 | struct task_struct *master_thread; | |
845 | struct delayed_work master_wakeup_work; | |
846 | struct netns_ipvs *ipvs; | |
847 | }; | |
848 | ||
2553d064 JA |
849 | /* IPVS in network namespace */ |
850 | struct netns_ipvs { | |
851 | int gen; /* Generation */ | |
7a4f0761 | 852 | int enable; /* enable like nf_hooks do */ |
2553d064 JA |
853 | /* |
854 | * Hash table: for real service lookups | |
855 | */ | |
856 | #define IP_VS_RTAB_BITS 4 | |
857 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
858 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
859 | ||
860 | struct list_head rs_table[IP_VS_RTAB_SIZE]; | |
861 | /* ip_vs_app */ | |
862 | struct list_head app_list; | |
2553d064 JA |
863 | /* ip_vs_proto */ |
864 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
865 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
866 | /* ip_vs_proto_tcp */ | |
867 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
868 | #define TCP_APP_TAB_BITS 4 | |
869 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
870 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
871 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
872 | spinlock_t tcp_app_lock; | |
873 | #endif | |
874 | /* ip_vs_proto_udp */ | |
875 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
876 | #define UDP_APP_TAB_BITS 4 | |
877 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
878 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
879 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
880 | spinlock_t udp_app_lock; | |
881 | #endif | |
882 | /* ip_vs_proto_sctp */ | |
883 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
884 | #define SCTP_APP_TAB_BITS 4 | |
885 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
886 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
887 | /* Hash table for SCTP application incarnations */ | |
888 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
889 | spinlock_t sctp_app_lock; | |
890 | #endif | |
891 | /* ip_vs_conn */ | |
892 | atomic_t conn_count; /* connection counter */ | |
893 | ||
894 | /* ip_vs_ctl */ | |
2a0751af | 895 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
2553d064 JA |
896 | |
897 | int num_services; /* no of virtual services */ | |
f2247fbd SH |
898 | |
899 | rwlock_t rs_lock; /* real services table */ | |
f2247fbd SH |
900 | /* Trash for destinations */ |
901 | struct list_head dest_trash; | |
902 | /* Service counters */ | |
903 | atomic_t ftpsvc_counter; | |
904 | atomic_t nullsvc_counter; | |
905 | ||
906 | #ifdef CONFIG_SYSCTL | |
2553d064 JA |
907 | /* 1/rate drop and drop-entry variables */ |
908 | struct delayed_work defense_work; /* Work handler */ | |
909 | int drop_rate; | |
910 | int drop_counter; | |
911 | atomic_t dropentry; | |
912 | /* locks in ctl.c */ | |
913 | spinlock_t dropentry_lock; /* drop entry handling */ | |
914 | spinlock_t droppacket_lock; /* drop packet handling */ | |
915 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
916 | |
917 | /* sys-ctl struct */ | |
918 | struct ctl_table_header *sysctl_hdr; | |
919 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
920 | #endif |
921 | ||
2553d064 JA |
922 | /* sysctl variables */ |
923 | int sysctl_amemthresh; | |
924 | int sysctl_am_droprate; | |
925 | int sysctl_drop_entry; | |
926 | int sysctl_drop_packet; | |
927 | int sysctl_secure_tcp; | |
928 | #ifdef CONFIG_IP_VS_NFCT | |
929 | int sysctl_conntrack; | |
930 | #endif | |
931 | int sysctl_snat_reroute; | |
932 | int sysctl_sync_ver; | |
f73181c8 | 933 | int sysctl_sync_ports; |
1c003b15 PNA |
934 | int sysctl_sync_qlen_max; |
935 | int sysctl_sync_sock_size; | |
2553d064 JA |
936 | int sysctl_cache_bypass; |
937 | int sysctl_expire_nodest_conn; | |
938 | int sysctl_expire_quiescent_template; | |
939 | int sysctl_sync_threshold[2]; | |
749c42b6 JA |
940 | unsigned int sysctl_sync_refresh_period; |
941 | int sysctl_sync_retries; | |
2553d064 | 942 | int sysctl_nat_icmp_send; |
3654e611 | 943 | int sysctl_pmtu_disc; |
2553d064 JA |
944 | |
945 | /* ip_vs_lblc */ | |
946 | int sysctl_lblc_expiration; | |
947 | struct ctl_table_header *lblc_ctl_header; | |
948 | struct ctl_table *lblc_ctl_table; | |
949 | /* ip_vs_lblcr */ | |
950 | int sysctl_lblcr_expiration; | |
951 | struct ctl_table_header *lblcr_ctl_header; | |
952 | struct ctl_table *lblcr_ctl_table; | |
953 | /* ip_vs_est */ | |
954 | struct list_head est_list; /* estimator list */ | |
955 | spinlock_t est_lock; | |
956 | struct timer_list est_timer; /* Estimation timer */ | |
957 | /* ip_vs_sync */ | |
2553d064 | 958 | spinlock_t sync_lock; |
f73181c8 | 959 | struct ipvs_master_sync_state *ms; |
2553d064 | 960 | spinlock_t sync_buff_lock; |
f73181c8 PNA |
961 | struct task_struct **backup_threads; |
962 | int threads_mask; | |
2553d064 JA |
963 | int send_mesg_maxlen; |
964 | int recv_mesg_maxlen; | |
965 | volatile int sync_state; | |
966 | volatile int master_syncid; | |
967 | volatile int backup_syncid; | |
ae1d48b2 | 968 | struct mutex sync_mutex; |
2553d064 JA |
969 | /* multicast interface name */ |
970 | char master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
971 | char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
972 | /* net name space ptr */ | |
973 | struct net *net; /* Needed by timer routines */ | |
974 | }; | |
1da177e4 | 975 | |
59e0350e SH |
976 | #define DEFAULT_SYNC_THRESHOLD 3 |
977 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 978 | #define DEFAULT_SYNC_VER 1 |
749c42b6 JA |
979 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
980 | #define DEFAULT_SYNC_RETRIES 0 | |
1c003b15 PNA |
981 | #define IPVS_SYNC_WAKEUP_RATE 8 |
982 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
983 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
984 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
749c42b6 | 985 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
f73181c8 | 986 | #define IPVS_SYNC_PORTS_MAX (1 << 6) |
59e0350e SH |
987 | |
988 | #ifdef CONFIG_SYSCTL | |
989 | ||
990 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
991 | { | |
992 | return ipvs->sysctl_sync_threshold[0]; | |
993 | } | |
994 | ||
995 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
996 | { | |
749c42b6 JA |
997 | return ACCESS_ONCE(ipvs->sysctl_sync_threshold[1]); |
998 | } | |
999 | ||
1000 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
1001 | { | |
1002 | return ACCESS_ONCE(ipvs->sysctl_sync_refresh_period); | |
1003 | } | |
1004 | ||
1005 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1006 | { | |
1007 | return ipvs->sysctl_sync_retries; | |
59e0350e SH |
1008 | } |
1009 | ||
7532e8d4 SH |
1010 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1011 | { | |
1012 | return ipvs->sysctl_sync_ver; | |
1013 | } | |
1014 | ||
f73181c8 PNA |
1015 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1016 | { | |
1017 | return ACCESS_ONCE(ipvs->sysctl_sync_ports); | |
1018 | } | |
1019 | ||
1c003b15 PNA |
1020 | static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1021 | { | |
1022 | return ipvs->sysctl_sync_qlen_max; | |
1023 | } | |
1024 | ||
1025 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1026 | { | |
1027 | return ipvs->sysctl_sync_sock_size; | |
1028 | } | |
1029 | ||
3654e611 JA |
1030 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1031 | { | |
1032 | return ipvs->sysctl_pmtu_disc; | |
1033 | } | |
1034 | ||
59e0350e SH |
1035 | #else |
1036 | ||
1037 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1038 | { | |
1039 | return DEFAULT_SYNC_THRESHOLD; | |
1040 | } | |
1041 | ||
1042 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1043 | { | |
1044 | return DEFAULT_SYNC_PERIOD; | |
1045 | } | |
1046 | ||
749c42b6 JA |
1047 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
1048 | { | |
1049 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1050 | } | |
1051 | ||
1052 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1053 | { | |
1054 | return DEFAULT_SYNC_RETRIES & 3; | |
1055 | } | |
1056 | ||
7532e8d4 SH |
1057 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1058 | { | |
1059 | return DEFAULT_SYNC_VER; | |
1060 | } | |
1061 | ||
f73181c8 PNA |
1062 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1063 | { | |
1064 | return 1; | |
1065 | } | |
1066 | ||
1c003b15 PNA |
1067 | static inline int sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1068 | { | |
1069 | return IPVS_SYNC_QLEN_MAX; | |
1070 | } | |
1071 | ||
1072 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1073 | { | |
1074 | return 0; | |
1075 | } | |
1076 | ||
3654e611 JA |
1077 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1078 | { | |
1079 | return 1; | |
1080 | } | |
1081 | ||
59e0350e SH |
1082 | #endif |
1083 | ||
1da177e4 LT |
1084 | /* |
1085 | * IPVS core functions | |
1086 | * (from ip_vs_core.c) | |
1087 | */ | |
95c96174 | 1088 | extern const char *ip_vs_proto_name(unsigned int proto); |
1da177e4 | 1089 | extern void ip_vs_init_hash_table(struct list_head *table, int rows); |
afdd6140 | 1090 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 1091 | |
1da177e4 LT |
1092 | #define IP_VS_APP_TYPE_FTP 1 |
1093 | ||
1094 | /* | |
1095 | * ip_vs_conn handling functions | |
1096 | * (from ip_vs_conn.c) | |
1097 | */ | |
1098 | ||
1da177e4 LT |
1099 | enum { |
1100 | IP_VS_DIR_INPUT = 0, | |
1101 | IP_VS_DIR_OUTPUT, | |
1102 | IP_VS_DIR_INPUT_ONLY, | |
1103 | IP_VS_DIR_LAST, | |
1104 | }; | |
1105 | ||
6e67e586 | 1106 | static inline void ip_vs_conn_fill_param(struct net *net, int af, int protocol, |
f11017ec SH |
1107 | const union nf_inet_addr *caddr, |
1108 | __be16 cport, | |
1109 | const union nf_inet_addr *vaddr, | |
1110 | __be16 vport, | |
1111 | struct ip_vs_conn_param *p) | |
1112 | { | |
6e67e586 | 1113 | p->net = net; |
f11017ec SH |
1114 | p->af = af; |
1115 | p->protocol = protocol; | |
1116 | p->caddr = caddr; | |
1117 | p->cport = cport; | |
1118 | p->vaddr = vaddr; | |
1119 | p->vport = vport; | |
85999283 SH |
1120 | p->pe = NULL; |
1121 | p->pe_data = NULL; | |
f11017ec | 1122 | } |
28364a59 | 1123 | |
f11017ec SH |
1124 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
1125 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 1126 | |
5c0d2374 | 1127 | struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb, |
5c0d2374 SH |
1128 | const struct ip_vs_iphdr *iph, |
1129 | unsigned int proto_off, | |
1130 | int inverse); | |
1131 | ||
f11017ec | 1132 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 1133 | |
5c0d2374 | 1134 | struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb, |
5c0d2374 SH |
1135 | const struct ip_vs_iphdr *iph, |
1136 | unsigned int proto_off, | |
1137 | int inverse); | |
1138 | ||
1da177e4 LT |
1139 | /* put back the conn without restarting its timer */ |
1140 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1141 | { | |
1142 | atomic_dec(&cp->refcnt); | |
1143 | } | |
1144 | extern void ip_vs_conn_put(struct ip_vs_conn *cp); | |
014d730d | 1145 | extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); |
1da177e4 | 1146 | |
f11017ec SH |
1147 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, |
1148 | const union nf_inet_addr *daddr, | |
95c96174 | 1149 | __be16 dport, unsigned int flags, |
0e051e68 | 1150 | struct ip_vs_dest *dest, __u32 fwmark); |
1da177e4 LT |
1151 | extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1152 | ||
1153 | extern const char * ip_vs_state_name(__u16 proto, int state); | |
1154 | ||
4a85b96c | 1155 | extern void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp); |
1da177e4 | 1156 | extern int ip_vs_check_template(struct ip_vs_conn *ct); |
f6340ee0 | 1157 | extern void ip_vs_random_dropentry(struct net *net); |
1da177e4 LT |
1158 | extern int ip_vs_conn_init(void); |
1159 | extern void ip_vs_conn_cleanup(void); | |
1160 | ||
1161 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1162 | { | |
1163 | struct ip_vs_conn *ctl_cp = cp->control; | |
1164 | if (!ctl_cp) { | |
cfc78c5a JV |
1165 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
1166 | "%s:%d to %s:%d\n", | |
1167 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1168 | ntohs(cp->cport), | |
1169 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1170 | ntohs(cp->vport)); | |
1171 | ||
1da177e4 LT |
1172 | return; |
1173 | } | |
1174 | ||
cfc78c5a JV |
1175 | IP_VS_DBG_BUF(7, "DELeting control for: " |
1176 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1177 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1178 | ntohs(cp->cport), | |
1179 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1180 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1181 | |
1182 | cp->control = NULL; | |
1183 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1184 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1185 | "%s:%d to %s:%d\n", | |
1186 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1187 | ntohs(cp->cport), | |
1188 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1189 | ntohs(cp->vport)); | |
1190 | ||
1da177e4 LT |
1191 | return; |
1192 | } | |
1193 | atomic_dec(&ctl_cp->n_control); | |
1194 | } | |
1195 | ||
1196 | static inline void | |
1197 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1198 | { | |
1199 | if (cp->control) { | |
cfc78c5a JV |
1200 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
1201 | "%s:%d to %s:%d\n", | |
1202 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1203 | ntohs(cp->cport), | |
1204 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1205 | ntohs(cp->vport)); | |
1206 | ||
1da177e4 LT |
1207 | ip_vs_control_del(cp); |
1208 | } | |
1209 | ||
cfc78c5a JV |
1210 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1211 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1212 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1213 | ntohs(cp->cport), | |
1214 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1215 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1216 | |
1217 | cp->control = ctl_cp; | |
1218 | atomic_inc(&ctl_cp->n_control); | |
1219 | } | |
1220 | ||
7a4f0761 HS |
1221 | /* |
1222 | * IPVS netns init & cleanup functions | |
1223 | */ | |
503cf15a HS |
1224 | extern int ip_vs_estimator_net_init(struct net *net); |
1225 | extern int ip_vs_control_net_init(struct net *net); | |
1226 | extern int ip_vs_protocol_net_init(struct net *net); | |
1227 | extern int ip_vs_app_net_init(struct net *net); | |
1228 | extern int ip_vs_conn_net_init(struct net *net); | |
1229 | extern int ip_vs_sync_net_init(struct net *net); | |
1230 | extern void ip_vs_conn_net_cleanup(struct net *net); | |
1231 | extern void ip_vs_app_net_cleanup(struct net *net); | |
1232 | extern void ip_vs_protocol_net_cleanup(struct net *net); | |
1233 | extern void ip_vs_control_net_cleanup(struct net *net); | |
1234 | extern void ip_vs_estimator_net_cleanup(struct net *net); | |
1235 | extern void ip_vs_sync_net_cleanup(struct net *net); | |
1236 | extern void ip_vs_service_net_cleanup(struct net *net); | |
1da177e4 LT |
1237 | |
1238 | /* | |
1239 | * IPVS application functions | |
1240 | * (from ip_vs_app.c) | |
1241 | */ | |
1242 | #define IP_VS_APP_MAX_PORTS 8 | |
be97fdb5 JA |
1243 | extern struct ip_vs_app *register_ip_vs_app(struct net *net, |
1244 | struct ip_vs_app *app); | |
ab8a5e84 | 1245 | extern void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app); |
1da177e4 LT |
1246 | extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
1247 | extern void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
ab8a5e84 HS |
1248 | extern int register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app, |
1249 | __u16 proto, __u16 port); | |
1da177e4 LT |
1250 | extern int ip_vs_app_inc_get(struct ip_vs_app *inc); |
1251 | extern void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1252 | ||
3db05fea HX |
1253 | extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); |
1254 | extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
1da177e4 | 1255 | |
8be67a66 SH |
1256 | void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe); |
1257 | void ip_vs_unbind_pe(struct ip_vs_service *svc); | |
1258 | int register_ip_vs_pe(struct ip_vs_pe *pe); | |
1259 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1260 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1261 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 | 1262 | |
69e7dae4 PG |
1263 | /* |
1264 | * Use a #define to avoid all of module.h just for these trivial ops | |
1265 | */ | |
1266 | #define ip_vs_pe_get(pe) \ | |
1267 | if (pe && pe->module) \ | |
e9e5eee8 | 1268 | __module_get(pe->module); |
e9e5eee8 | 1269 | |
69e7dae4 PG |
1270 | #define ip_vs_pe_put(pe) \ |
1271 | if (pe && pe->module) \ | |
e9e5eee8 | 1272 | module_put(pe->module); |
1da177e4 LT |
1273 | |
1274 | /* | |
1275 | * IPVS protocol functions (from ip_vs_proto.c) | |
1276 | */ | |
1277 | extern int ip_vs_protocol_init(void); | |
1278 | extern void ip_vs_protocol_cleanup(void); | |
9330419d | 1279 | extern void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); |
1da177e4 LT |
1280 | extern int *ip_vs_create_timeout_table(int *table, int size); |
1281 | extern int | |
36cbd3dc JE |
1282 | ip_vs_set_state_timeout(int *table, int num, const char *const *names, |
1283 | const char *name, int to); | |
1da177e4 | 1284 | extern void |
0d79641a JA |
1285 | ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
1286 | const struct sk_buff *skb, | |
1da177e4 LT |
1287 | int offset, const char *msg); |
1288 | ||
1289 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1290 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1291 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1292 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1293 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1294 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 LT |
1295 | |
1296 | /* | |
1297 | * Registering/unregistering scheduler functions | |
1298 | * (from ip_vs_sched.c) | |
1299 | */ | |
1300 | extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1301 | extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1302 | extern int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1303 | struct ip_vs_scheduler *scheduler); | |
1304 | extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc); | |
1305 | extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1306 | extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1307 | extern struct ip_vs_conn * | |
190ecd27 | 1308 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
9330419d | 1309 | struct ip_vs_proto_data *pd, int *ignored); |
1da177e4 | 1310 | extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
9330419d | 1311 | struct ip_vs_proto_data *pd); |
1da177e4 | 1312 | |
41ac51ee PS |
1313 | extern void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
1314 | ||
1da177e4 LT |
1315 | |
1316 | /* | |
1317 | * IPVS control data and functions (from ip_vs_ctl.c) | |
1318 | */ | |
1da177e4 | 1319 | extern struct ip_vs_stats ip_vs_stats; |
b880c1f0 | 1320 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 LT |
1321 | |
1322 | extern struct ip_vs_service * | |
fc723250 | 1323 | ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1324 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 LT |
1325 | |
1326 | static inline void ip_vs_service_put(struct ip_vs_service *svc) | |
1327 | { | |
1328 | atomic_dec(&svc->usecnt); | |
1329 | } | |
1330 | ||
1331 | extern struct ip_vs_dest * | |
fc723250 | 1332 | ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol, |
7937df15 JV |
1333 | const union nf_inet_addr *daddr, __be16 dport); |
1334 | ||
1da177e4 LT |
1335 | extern int ip_vs_use_count_inc(void); |
1336 | extern void ip_vs_use_count_dec(void); | |
8537de8a HS |
1337 | extern int ip_vs_register_nl_ioctl(void); |
1338 | extern void ip_vs_unregister_nl_ioctl(void); | |
1da177e4 LT |
1339 | extern int ip_vs_control_init(void); |
1340 | extern void ip_vs_control_cleanup(void); | |
1e356f9c | 1341 | extern struct ip_vs_dest * |
fc723250 HS |
1342 | ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr, |
1343 | __be16 dport, const union nf_inet_addr *vaddr, __be16 vport, | |
52793dbe | 1344 | __u16 protocol, __u32 fwmark, __u32 flags); |
1e356f9c | 1345 | extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 LT |
1346 | |
1347 | ||
1348 | /* | |
1349 | * IPVS sync daemon data and function prototypes | |
1350 | * (from ip_vs_sync.c) | |
1351 | */ | |
f131315f HS |
1352 | extern int start_sync_thread(struct net *net, int state, char *mcast_ifn, |
1353 | __u8 syncid); | |
1354 | extern int stop_sync_thread(struct net *net, int state); | |
749c42b6 | 1355 | extern void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp, int pkts); |
1da177e4 LT |
1356 | |
1357 | ||
1358 | /* | |
1359 | * IPVS rate estimator prototypes (from ip_vs_est.c) | |
1360 | */ | |
6ef757f9 JA |
1361 | extern void ip_vs_start_estimator(struct net *net, struct ip_vs_stats *stats); |
1362 | extern void ip_vs_stop_estimator(struct net *net, struct ip_vs_stats *stats); | |
1da177e4 | 1363 | extern void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
ea9f22cc JA |
1364 | extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst, |
1365 | struct ip_vs_stats *stats); | |
1da177e4 LT |
1366 | |
1367 | /* | |
1368 | * Various IPVS packet transmitters (from ip_vs_xmit.c) | |
1369 | */ | |
1370 | extern int ip_vs_null_xmit | |
1371 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1372 | extern int ip_vs_bypass_xmit | |
1373 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1374 | extern int ip_vs_nat_xmit | |
1375 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1376 | extern int ip_vs_tunnel_xmit | |
1377 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1378 | extern int ip_vs_dr_xmit | |
1379 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1380 | extern int ip_vs_icmp_xmit | |
c92f5ca2 JA |
1381 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, |
1382 | int offset, unsigned int hooknum); | |
1da177e4 LT |
1383 | extern void ip_vs_dst_reset(struct ip_vs_dest *dest); |
1384 | ||
b3cdd2a7 JV |
1385 | #ifdef CONFIG_IP_VS_IPV6 |
1386 | extern int ip_vs_bypass_xmit_v6 | |
1387 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1388 | extern int ip_vs_nat_xmit_v6 | |
1389 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1390 | extern int ip_vs_tunnel_xmit_v6 | |
1391 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1392 | extern int ip_vs_dr_xmit_v6 | |
1393 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1394 | extern int ip_vs_icmp_xmit_v6 | |
1395 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, | |
c92f5ca2 | 1396 | int offset, unsigned int hooknum); |
b3cdd2a7 | 1397 | #endif |
1da177e4 | 1398 | |
3a1bbf18 | 1399 | #ifdef CONFIG_SYSCTL |
1da177e4 LT |
1400 | /* |
1401 | * This is a simple mechanism to ignore packets when | |
1402 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1403 | * we start to drop 1/rate of the packets | |
1404 | */ | |
1da177e4 | 1405 | |
a0840e2e | 1406 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1407 | { |
a0840e2e HS |
1408 | if (!ipvs->drop_rate) |
1409 | return 0; | |
1410 | if (--ipvs->drop_counter > 0) | |
1411 | return 0; | |
1412 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1413 | return 1; |
1414 | } | |
3a1bbf18 SH |
1415 | #else |
1416 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1417 | #endif | |
1da177e4 LT |
1418 | |
1419 | /* | |
1420 | * ip_vs_fwd_tag returns the forwarding tag of the connection | |
1421 | */ | |
1422 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) | |
1423 | ||
732db659 | 1424 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1425 | { |
1426 | char fwd; | |
1427 | ||
1428 | switch (IP_VS_FWD_METHOD(cp)) { | |
1429 | case IP_VS_CONN_F_MASQ: | |
1430 | fwd = 'M'; break; | |
1431 | case IP_VS_CONN_F_LOCALNODE: | |
1432 | fwd = 'L'; break; | |
1433 | case IP_VS_CONN_F_TUNNEL: | |
1434 | fwd = 'T'; break; | |
1435 | case IP_VS_CONN_F_DROUTE: | |
1436 | fwd = 'R'; break; | |
1437 | case IP_VS_CONN_F_BYPASS: | |
1438 | fwd = 'B'; break; | |
1439 | default: | |
1440 | fwd = '?'; break; | |
1441 | } | |
1442 | return fwd; | |
1443 | } | |
1444 | ||
1da177e4 | 1445 | extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
b3cdd2a7 JV |
1446 | struct ip_vs_conn *cp, int dir); |
1447 | ||
1448 | #ifdef CONFIG_IP_VS_IPV6 | |
1449 | extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
1450 | struct ip_vs_conn *cp, int dir); | |
1451 | #endif | |
1da177e4 | 1452 | |
b1550f22 | 1453 | extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1454 | |
f9214b26 | 1455 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1456 | { |
f9214b26 | 1457 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1458 | |
07f0757a | 1459 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1460 | } |
1461 | ||
0bbdd42b JV |
1462 | #ifdef CONFIG_IP_VS_IPV6 |
1463 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1464 | __wsum oldsum) | |
1465 | { | |
1466 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1467 | new[3], new[2], new[1], new[0] }; | |
1468 | ||
07f0757a | 1469 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1470 | } |
1471 | #endif | |
1472 | ||
f9214b26 AV |
1473 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1474 | { | |
1475 | __be16 diff[2] = { ~old, new }; | |
1476 | ||
07f0757a | 1477 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1478 | } |
1479 | ||
cf356d69 JA |
1480 | /* |
1481 | * Forget current conntrack (unconfirmed) and attach notrack entry | |
1482 | */ | |
1483 | static inline void ip_vs_notrack(struct sk_buff *skb) | |
1484 | { | |
1485 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1486 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1487 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 JA |
1488 | |
1489 | if (!ct || !nf_ct_is_untracked(ct)) { | |
9e33ce45 | 1490 | nf_conntrack_put(skb->nfct); |
cf356d69 JA |
1491 | skb->nfct = &nf_ct_untracked_get()->ct_general; |
1492 | skb->nfctinfo = IP_CT_NEW; | |
1493 | nf_conntrack_get(skb->nfct); | |
1494 | } | |
1495 | #endif | |
1496 | } | |
1497 | ||
f4bc17cd JA |
1498 | #ifdef CONFIG_IP_VS_NFCT |
1499 | /* | |
1500 | * Netfilter connection tracking | |
1501 | * (from ip_vs_nfct.c) | |
1502 | */ | |
a0840e2e | 1503 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1504 | { |
a4e2f5a7 | 1505 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1506 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1507 | #else |
1508 | return 0; | |
1509 | #endif | |
f4bc17cd JA |
1510 | } |
1511 | ||
6523ce15 JA |
1512 | extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1513 | int outin); | |
3c2de2ae | 1514 | extern int ip_vs_confirm_conntrack(struct sk_buff *skb); |
f4bc17cd JA |
1515 | extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, |
1516 | struct ip_vs_conn *cp, u_int8_t proto, | |
1517 | const __be16 port, int from_rs); | |
1518 | extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
1519 | ||
1520 | #else | |
1521 | ||
a0840e2e | 1522 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1523 | { |
1524 | return 0; | |
1525 | } | |
1526 | ||
1527 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1528 | struct ip_vs_conn *cp, int outin) | |
1529 | { | |
1530 | } | |
1531 | ||
e23ebf0f | 1532 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
f4bc17cd JA |
1533 | { |
1534 | return NF_ACCEPT; | |
1535 | } | |
1536 | ||
1537 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1538 | { | |
1539 | } | |
1540 | /* CONFIG_IP_VS_NFCT */ | |
1541 | #endif | |
6523ce15 | 1542 | |
b552f7e3 CG |
1543 | static inline unsigned int |
1544 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) | |
1545 | { | |
1546 | /* | |
1547 | * We think the overhead of processing active connections is 256 | |
1548 | * times higher than that of inactive connections in average. (This | |
1549 | * 256 times might not be accurate, we will change it later) We | |
1550 | * use the following formula to estimate the overhead now: | |
1551 | * dest->activeconns*256 + dest->inactconns | |
1552 | */ | |
1553 | return (atomic_read(&dest->activeconns) << 8) + | |
1554 | atomic_read(&dest->inactconns); | |
1555 | } | |
1556 | ||
bc4768eb | 1557 | #endif /* _NET_IP_VS_H */ |