]>
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 | ||
13 | #include <linux/sysctl.h> /* for ctl_path */ | |
1da177e4 LT |
14 | #include <linux/list.h> /* for struct list_head */ |
15 | #include <linux/spinlock.h> /* for struct rwlock_t */ | |
60063497 | 16 | #include <linux/atomic.h> /* for struct atomic_t */ |
1da177e4 | 17 | #include <linux/compiler.h> |
14c85021 | 18 | #include <linux/timer.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 JV |
23 | #include <linux/ipv6.h> /* for struct ipv6hdr */ |
24 | #include <net/ipv6.h> /* for ipv6_addr_copy */ | |
cf356d69 | 25 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) |
f4bc17cd JA |
26 | #include <net/netfilter/nf_conntrack.h> |
27 | #endif | |
61b1ab45 HS |
28 | #include <net/net_namespace.h> /* Netw namespace */ |
29 | ||
30 | /* | |
31 | * Generic access of ipvs struct | |
32 | */ | |
33 | static inline struct netns_ipvs *net_ipvs(struct net* net) | |
34 | { | |
35 | return net->ipvs; | |
36 | } | |
fc723250 HS |
37 | /* |
38 | * Get net ptr from skb in traffic cases | |
39 | * use skb_sknet when call is from userland (ioctl or netlink) | |
40 | */ | |
a0840e2e | 41 | static inline struct net *skb_net(const struct sk_buff *skb) |
fc723250 HS |
42 | { |
43 | #ifdef CONFIG_NET_NS | |
44 | #ifdef CONFIG_IP_VS_DEBUG | |
45 | /* | |
46 | * This is used for debug only. | |
47 | * Start with the most likely hit | |
48 | * End with BUG | |
49 | */ | |
50 | if (likely(skb->dev && skb->dev->nd_net)) | |
51 | return dev_net(skb->dev); | |
a09d1977 | 52 | if (skb_dst(skb) && skb_dst(skb)->dev) |
fc723250 HS |
53 | return dev_net(skb_dst(skb)->dev); |
54 | WARN(skb->sk, "Maybe skb_sknet should be used in %s() at line:%d\n", | |
55 | __func__, __LINE__); | |
56 | if (likely(skb->sk && skb->sk->sk_net)) | |
57 | return sock_net(skb->sk); | |
58 | pr_err("There is no net ptr to find in the skb in %s() line:%d\n", | |
59 | __func__, __LINE__); | |
60 | BUG(); | |
61 | #else | |
62 | return dev_net(skb->dev ? : skb_dst(skb)->dev); | |
63 | #endif | |
64 | #else | |
65 | return &init_net; | |
66 | #endif | |
67 | } | |
68 | ||
a0840e2e | 69 | static inline struct net *skb_sknet(const struct sk_buff *skb) |
fc723250 HS |
70 | { |
71 | #ifdef CONFIG_NET_NS | |
72 | #ifdef CONFIG_IP_VS_DEBUG | |
73 | /* Start with the most likely hit */ | |
74 | if (likely(skb->sk && skb->sk->sk_net)) | |
75 | return sock_net(skb->sk); | |
76 | WARN(skb->dev, "Maybe skb_net should be used instead in %s() line:%d\n", | |
77 | __func__, __LINE__); | |
78 | if (likely(skb->dev && skb->dev->nd_net)) | |
79 | return dev_net(skb->dev); | |
80 | pr_err("There is no net ptr to find in the skb in %s() line:%d\n", | |
81 | __func__, __LINE__); | |
82 | BUG(); | |
83 | #else | |
84 | return sock_net(skb->sk); | |
85 | #endif | |
86 | #else | |
87 | return &init_net; | |
88 | #endif | |
89 | } | |
b17fc996 HS |
90 | /* |
91 | * This one needed for single_open_net since net is stored directly in | |
25985edc | 92 | * private not as a struct i.e. seq_file_net can't be used. |
b17fc996 HS |
93 | */ |
94 | static inline struct net *seq_file_single_net(struct seq_file *seq) | |
95 | { | |
96 | #ifdef CONFIG_NET_NS | |
97 | return (struct net *)seq->private; | |
98 | #else | |
99 | return &init_net; | |
100 | #endif | |
101 | } | |
6f7edb48 CB |
102 | |
103 | /* Connections' size value needed by ip_vs_ctl.c */ | |
104 | extern int ip_vs_conn_tab_size; | |
105 | ||
106 | ||
64aae3cb JV |
107 | struct ip_vs_iphdr { |
108 | int len; | |
109 | __u8 protocol; | |
110 | union nf_inet_addr saddr; | |
111 | union nf_inet_addr daddr; | |
112 | }; | |
113 | ||
114 | static inline void | |
115 | ip_vs_fill_iphdr(int af, const void *nh, struct ip_vs_iphdr *iphdr) | |
116 | { | |
117 | #ifdef CONFIG_IP_VS_IPV6 | |
118 | if (af == AF_INET6) { | |
119 | const struct ipv6hdr *iph = nh; | |
120 | iphdr->len = sizeof(struct ipv6hdr); | |
121 | iphdr->protocol = iph->nexthdr; | |
122 | ipv6_addr_copy(&iphdr->saddr.in6, &iph->saddr); | |
123 | ipv6_addr_copy(&iphdr->daddr.in6, &iph->daddr); | |
124 | } else | |
125 | #endif | |
126 | { | |
127 | const struct iphdr *iph = nh; | |
128 | iphdr->len = iph->ihl * 4; | |
129 | iphdr->protocol = iph->protocol; | |
130 | iphdr->saddr.ip = iph->saddr; | |
131 | iphdr->daddr.ip = iph->daddr; | |
132 | } | |
133 | } | |
134 | ||
135 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, | |
136 | const union nf_inet_addr *src) | |
137 | { | |
138 | #ifdef CONFIG_IP_VS_IPV6 | |
139 | if (af == AF_INET6) | |
140 | ipv6_addr_copy(&dst->in6, &src->in6); | |
141 | else | |
142 | #endif | |
143 | dst->ip = src->ip; | |
144 | } | |
145 | ||
146 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, | |
147 | const union nf_inet_addr *b) | |
148 | { | |
149 | #ifdef CONFIG_IP_VS_IPV6 | |
150 | if (af == AF_INET6) | |
151 | return ipv6_addr_equal(&a->in6, &b->in6); | |
152 | #endif | |
153 | return a->ip == b->ip; | |
154 | } | |
155 | ||
1da177e4 | 156 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
157 | #include <linux/net.h> |
158 | ||
1da177e4 | 159 | extern int ip_vs_get_debug_level(void); |
c842a3ad JV |
160 | |
161 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
162 | const union nf_inet_addr *addr, | |
163 | int *idx) | |
164 | { | |
165 | int len; | |
166 | #ifdef CONFIG_IP_VS_IPV6 | |
167 | if (af == AF_INET6) | |
5b095d98 | 168 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6]", |
0c6ce78a | 169 | &addr->in6) + 1; |
c842a3ad JV |
170 | else |
171 | #endif | |
3685f25d HH |
172 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
173 | &addr->ip) + 1; | |
c842a3ad JV |
174 | |
175 | *idx += len; | |
176 | BUG_ON(*idx > buf_len + 1); | |
177 | return &buf[*idx - len]; | |
178 | } | |
179 | ||
9aada7ac HE |
180 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
181 | do { \ | |
182 | char ip_vs_dbg_buf[160]; \ | |
183 | int ip_vs_dbg_idx = 0; \ | |
184 | if (level <= ip_vs_get_debug_level()) \ | |
185 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
186 | } while (0) | |
187 | #define IP_VS_ERR_BUF(msg...) \ | |
188 | do { \ | |
189 | char ip_vs_dbg_buf[160]; \ | |
190 | int ip_vs_dbg_idx = 0; \ | |
191 | pr_err(msg); \ | |
192 | } while (0) | |
c842a3ad JV |
193 | |
194 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
195 | #define IP_VS_DBG_ADDR(af, addr) \ |
196 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
197 | sizeof(ip_vs_dbg_buf), addr, \ | |
198 | &ip_vs_dbg_idx) | |
199 | ||
200 | #define IP_VS_DBG(level, msg, ...) \ | |
201 | do { \ | |
202 | if (level <= ip_vs_get_debug_level()) \ | |
203 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
204 | } while (0) | |
205 | #define IP_VS_DBG_RL(msg, ...) \ | |
206 | do { \ | |
207 | if (net_ratelimit()) \ | |
208 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
209 | } while (0) | |
0d79641a | 210 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
211 | do { \ |
212 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 213 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 214 | } while (0) |
0d79641a | 215 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
216 | do { \ |
217 | if (level <= ip_vs_get_debug_level() && \ | |
218 | net_ratelimit()) \ | |
0d79641a | 219 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 220 | } while (0) |
1da177e4 | 221 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
222 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
223 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
224 | #define IP_VS_DBG(level, msg...) do {} while (0) |
225 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
226 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
227 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
228 | #endif |
229 | ||
230 | #define IP_VS_BUG() BUG() | |
1e3e238e | 231 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
232 | do { \ |
233 | if (net_ratelimit()) \ | |
1e3e238e | 234 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 235 | } while (0) |
1da177e4 LT |
236 | |
237 | #ifdef CONFIG_IP_VS_DEBUG | |
238 | #define EnterFunction(level) \ | |
9aada7ac HE |
239 | do { \ |
240 | if (level <= ip_vs_get_debug_level()) \ | |
241 | printk(KERN_DEBUG \ | |
242 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
243 | __func__, __FILE__, __LINE__); \ | |
244 | } while (0) | |
245 | #define LeaveFunction(level) \ | |
246 | do { \ | |
247 | if (level <= ip_vs_get_debug_level()) \ | |
248 | printk(KERN_DEBUG \ | |
249 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
250 | __func__, __FILE__, __LINE__); \ | |
251 | } while (0) | |
1da177e4 LT |
252 | #else |
253 | #define EnterFunction(level) do {} while (0) | |
254 | #define LeaveFunction(level) do {} while (0) | |
255 | #endif | |
256 | ||
257 | #define IP_VS_WAIT_WHILE(expr) while (expr) { cpu_relax(); } | |
258 | ||
259 | ||
260 | /* | |
261 | * The port number of FTP service (in network order). | |
262 | */ | |
f3a7c66b HH |
263 | #define FTPPORT cpu_to_be16(21) |
264 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 265 | |
1da177e4 LT |
266 | /* |
267 | * TCP State Values | |
268 | */ | |
269 | enum { | |
270 | IP_VS_TCP_S_NONE = 0, | |
271 | IP_VS_TCP_S_ESTABLISHED, | |
272 | IP_VS_TCP_S_SYN_SENT, | |
273 | IP_VS_TCP_S_SYN_RECV, | |
274 | IP_VS_TCP_S_FIN_WAIT, | |
275 | IP_VS_TCP_S_TIME_WAIT, | |
276 | IP_VS_TCP_S_CLOSE, | |
277 | IP_VS_TCP_S_CLOSE_WAIT, | |
278 | IP_VS_TCP_S_LAST_ACK, | |
279 | IP_VS_TCP_S_LISTEN, | |
280 | IP_VS_TCP_S_SYNACK, | |
281 | IP_VS_TCP_S_LAST | |
282 | }; | |
283 | ||
284 | /* | |
285 | * UDP State Values | |
286 | */ | |
287 | enum { | |
288 | IP_VS_UDP_S_NORMAL, | |
289 | IP_VS_UDP_S_LAST, | |
290 | }; | |
291 | ||
292 | /* | |
293 | * ICMP State Values | |
294 | */ | |
295 | enum { | |
296 | IP_VS_ICMP_S_NORMAL, | |
297 | IP_VS_ICMP_S_LAST, | |
298 | }; | |
299 | ||
2906f66a VMR |
300 | /* |
301 | * SCTP State Values | |
302 | */ | |
303 | enum ip_vs_sctp_states { | |
304 | IP_VS_SCTP_S_NONE, | |
305 | IP_VS_SCTP_S_INIT_CLI, | |
306 | IP_VS_SCTP_S_INIT_SER, | |
307 | IP_VS_SCTP_S_INIT_ACK_CLI, | |
308 | IP_VS_SCTP_S_INIT_ACK_SER, | |
309 | IP_VS_SCTP_S_ECHO_CLI, | |
310 | IP_VS_SCTP_S_ECHO_SER, | |
311 | IP_VS_SCTP_S_ESTABLISHED, | |
312 | IP_VS_SCTP_S_SHUT_CLI, | |
313 | IP_VS_SCTP_S_SHUT_SER, | |
314 | IP_VS_SCTP_S_SHUT_ACK_CLI, | |
315 | IP_VS_SCTP_S_SHUT_ACK_SER, | |
316 | IP_VS_SCTP_S_CLOSED, | |
317 | IP_VS_SCTP_S_LAST | |
318 | }; | |
319 | ||
1da177e4 LT |
320 | /* |
321 | * Delta sequence info structure | |
322 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
323 | * Only used in the VS/NAT. | |
324 | */ | |
325 | struct ip_vs_seq { | |
326 | __u32 init_seq; /* Add delta from this seq */ | |
327 | __u32 delta; /* Delta in sequence numbers */ | |
328 | __u32 previous_delta; /* Delta in sequence numbers | |
329 | before last resized pkt */ | |
330 | }; | |
331 | ||
b17fc996 HS |
332 | /* |
333 | * counters per cpu | |
334 | */ | |
335 | struct ip_vs_counters { | |
336 | __u32 conns; /* connections scheduled */ | |
337 | __u32 inpkts; /* incoming packets */ | |
338 | __u32 outpkts; /* outgoing packets */ | |
339 | __u64 inbytes; /* incoming bytes */ | |
340 | __u64 outbytes; /* outgoing bytes */ | |
341 | }; | |
342 | /* | |
343 | * Stats per cpu | |
344 | */ | |
345 | struct ip_vs_cpu_stats { | |
346 | struct ip_vs_counters ustats; | |
347 | struct u64_stats_sync syncp; | |
348 | }; | |
1da177e4 LT |
349 | |
350 | /* | |
3a14a313 | 351 | * IPVS statistics objects |
1da177e4 | 352 | */ |
3a14a313 SW |
353 | struct ip_vs_estimator { |
354 | struct list_head list; | |
355 | ||
356 | u64 last_inbytes; | |
357 | u64 last_outbytes; | |
358 | u32 last_conns; | |
359 | u32 last_inpkts; | |
360 | u32 last_outpkts; | |
361 | ||
362 | u32 cps; | |
363 | u32 inpps; | |
364 | u32 outpps; | |
365 | u32 inbps; | |
366 | u32 outbps; | |
367 | }; | |
368 | ||
fd2c3ef7 | 369 | struct ip_vs_stats { |
b17fc996 | 370 | struct ip_vs_stats_user ustats; /* statistics */ |
e9c0ce23 | 371 | struct ip_vs_estimator est; /* estimator */ |
b17fc996 HS |
372 | struct ip_vs_cpu_stats *cpustats; /* per cpu counters */ |
373 | spinlock_t lock; /* spin lock */ | |
55a3d4e1 | 374 | struct ip_vs_stats_user ustats0; /* reset values */ |
1da177e4 LT |
375 | }; |
376 | ||
14c85021 ACM |
377 | struct dst_entry; |
378 | struct iphdr; | |
1da177e4 LT |
379 | struct ip_vs_conn; |
380 | struct ip_vs_app; | |
14c85021 | 381 | struct sk_buff; |
252c6410 | 382 | struct ip_vs_proto_data; |
1da177e4 LT |
383 | |
384 | struct ip_vs_protocol { | |
385 | struct ip_vs_protocol *next; | |
386 | char *name; | |
2ad17def JA |
387 | u16 protocol; |
388 | u16 num_states; | |
1da177e4 | 389 | int dont_defrag; |
1da177e4 LT |
390 | |
391 | void (*init)(struct ip_vs_protocol *pp); | |
392 | ||
393 | void (*exit)(struct ip_vs_protocol *pp); | |
394 | ||
252c6410 HS |
395 | void (*init_netns)(struct net *net, struct ip_vs_proto_data *pd); |
396 | ||
397 | void (*exit_netns)(struct net *net, struct ip_vs_proto_data *pd); | |
398 | ||
51ef348b | 399 | int (*conn_schedule)(int af, struct sk_buff *skb, |
9330419d | 400 | struct ip_vs_proto_data *pd, |
1da177e4 LT |
401 | int *verdict, struct ip_vs_conn **cpp); |
402 | ||
403 | struct ip_vs_conn * | |
51ef348b JV |
404 | (*conn_in_get)(int af, |
405 | const struct sk_buff *skb, | |
51ef348b | 406 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
407 | unsigned int proto_off, |
408 | int inverse); | |
409 | ||
410 | struct ip_vs_conn * | |
51ef348b JV |
411 | (*conn_out_get)(int af, |
412 | const struct sk_buff *skb, | |
51ef348b | 413 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
414 | unsigned int proto_off, |
415 | int inverse); | |
416 | ||
3db05fea | 417 | int (*snat_handler)(struct sk_buff *skb, |
1da177e4 LT |
418 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
419 | ||
3db05fea | 420 | int (*dnat_handler)(struct sk_buff *skb, |
1da177e4 LT |
421 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp); |
422 | ||
51ef348b JV |
423 | int (*csum_check)(int af, struct sk_buff *skb, |
424 | struct ip_vs_protocol *pp); | |
1da177e4 LT |
425 | |
426 | const char *(*state_name)(int state); | |
427 | ||
428 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
429 | const struct sk_buff *skb, | |
9330419d | 430 | struct ip_vs_proto_data *pd); |
1da177e4 | 431 | |
ab8a5e84 | 432 | int (*register_app)(struct net *net, struct ip_vs_app *inc); |
1da177e4 | 433 | |
ab8a5e84 | 434 | void (*unregister_app)(struct net *net, struct ip_vs_app *inc); |
1da177e4 LT |
435 | |
436 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
437 | ||
0d79641a | 438 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
439 | const struct sk_buff *skb, |
440 | int offset, | |
441 | const char *msg); | |
442 | ||
9330419d | 443 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
1da177e4 LT |
444 | }; |
445 | ||
252c6410 HS |
446 | /* |
447 | * protocol data per netns | |
448 | */ | |
449 | struct ip_vs_proto_data { | |
450 | struct ip_vs_proto_data *next; | |
451 | struct ip_vs_protocol *pp; | |
452 | int *timeout_table; /* protocol timeout table */ | |
453 | atomic_t appcnt; /* counter of proto app incs. */ | |
454 | struct tcp_states_t *tcp_state_table; | |
455 | }; | |
456 | ||
457 | extern struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); | |
458 | extern struct ip_vs_proto_data *ip_vs_proto_data_get(struct net *net, | |
459 | unsigned short proto); | |
1da177e4 | 460 | |
f11017ec | 461 | struct ip_vs_conn_param { |
6e67e586 | 462 | struct net *net; |
f11017ec SH |
463 | const union nf_inet_addr *caddr; |
464 | const union nf_inet_addr *vaddr; | |
465 | __be16 cport; | |
466 | __be16 vport; | |
467 | __u16 protocol; | |
468 | u16 af; | |
85999283 SH |
469 | |
470 | const struct ip_vs_pe *pe; | |
471 | char *pe_data; | |
472 | __u8 pe_data_len; | |
f11017ec SH |
473 | }; |
474 | ||
1da177e4 LT |
475 | /* |
476 | * IP_VS structure allocated for each dynamically scheduled connection | |
477 | */ | |
478 | struct ip_vs_conn { | |
731109e7 | 479 | struct hlist_node c_list; /* hashed list heads */ |
6e67e586 HS |
480 | #ifdef CONFIG_NET_NS |
481 | struct net *net; /* Name space */ | |
482 | #endif | |
1da177e4 | 483 | /* Protocol, addresses and port numbers */ |
6e67e586 HS |
484 | u16 af; /* address family */ |
485 | __be16 cport; | |
486 | __be16 vport; | |
487 | __be16 dport; | |
488 | __u32 fwmark; /* Fire wall mark from skb */ | |
489 | union nf_inet_addr caddr; /* client address */ | |
490 | union nf_inet_addr vaddr; /* virtual address */ | |
491 | union nf_inet_addr daddr; /* destination address */ | |
492 | volatile __u32 flags; /* status flags */ | |
1da177e4 LT |
493 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
494 | ||
495 | /* counter and timer */ | |
496 | atomic_t refcnt; /* reference count */ | |
497 | struct timer_list timer; /* Expiration timer */ | |
498 | volatile unsigned long timeout; /* timeout */ | |
499 | ||
500 | /* Flags and state transition */ | |
501 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 502 | volatile __u16 state; /* state info */ |
efac5276 RB |
503 | volatile __u16 old_state; /* old state, to be used for |
504 | * state transition triggerd | |
505 | * synchronization | |
506 | */ | |
1da177e4 LT |
507 | |
508 | /* Control members */ | |
509 | struct ip_vs_conn *control; /* Master control connection */ | |
510 | atomic_t n_control; /* Number of controlled ones */ | |
511 | struct ip_vs_dest *dest; /* real server */ | |
512 | atomic_t in_pkts; /* incoming packet counter */ | |
513 | ||
514 | /* packet transmitter for different forwarding methods. If it | |
515 | mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
516 | otherwise this must be changed to a sk_buff **. | |
fc604767 | 517 | NF_ACCEPT can be returned when destination is local. |
1da177e4 LT |
518 | */ |
519 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
520 | struct ip_vs_protocol *pp); | |
521 | ||
522 | /* Note: we can group the following members into a structure, | |
523 | in order to save more space, and the following members are | |
524 | only used in VS/NAT anyway */ | |
525 | struct ip_vs_app *app; /* bound ip_vs_app object */ | |
526 | void *app_data; /* Application private data */ | |
527 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
528 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
85999283 | 529 | |
e9e5eee8 | 530 | const struct ip_vs_pe *pe; |
85999283 SH |
531 | char *pe_data; |
532 | __u8 pe_data_len; | |
1da177e4 LT |
533 | }; |
534 | ||
6e67e586 HS |
535 | /* |
536 | * To save some memory in conn table when name space is disabled. | |
537 | */ | |
538 | static inline struct net *ip_vs_conn_net(const struct ip_vs_conn *cp) | |
539 | { | |
540 | #ifdef CONFIG_NET_NS | |
541 | return cp->net; | |
542 | #else | |
543 | return &init_net; | |
544 | #endif | |
545 | } | |
546 | static inline void ip_vs_conn_net_set(struct ip_vs_conn *cp, struct net *net) | |
547 | { | |
548 | #ifdef CONFIG_NET_NS | |
549 | cp->net = net; | |
550 | #endif | |
551 | } | |
552 | ||
553 | static inline int ip_vs_conn_net_eq(const struct ip_vs_conn *cp, | |
554 | struct net *net) | |
555 | { | |
556 | #ifdef CONFIG_NET_NS | |
557 | return cp->net == net; | |
558 | #else | |
559 | return 1; | |
560 | #endif | |
561 | } | |
1da177e4 | 562 | |
c860c6b1 JV |
563 | /* |
564 | * Extended internal versions of struct ip_vs_service_user and | |
565 | * ip_vs_dest_user for IPv6 support. | |
566 | * | |
567 | * We need these to conveniently pass around service and destination | |
568 | * options, but unfortunately, we also need to keep the old definitions to | |
569 | * maintain userspace backwards compatibility for the setsockopt interface. | |
570 | */ | |
571 | struct ip_vs_service_user_kern { | |
572 | /* virtual service addresses */ | |
573 | u16 af; | |
574 | u16 protocol; | |
575 | union nf_inet_addr addr; /* virtual ip address */ | |
576 | u16 port; | |
577 | u32 fwmark; /* firwall mark of service */ | |
578 | ||
579 | /* virtual service options */ | |
580 | char *sched_name; | |
0d1e71b0 | 581 | char *pe_name; |
c860c6b1 JV |
582 | unsigned flags; /* virtual service flags */ |
583 | unsigned timeout; /* persistent timeout in sec */ | |
584 | u32 netmask; /* persistent netmask */ | |
585 | }; | |
586 | ||
587 | ||
588 | struct ip_vs_dest_user_kern { | |
589 | /* destination server address */ | |
590 | union nf_inet_addr addr; | |
591 | u16 port; | |
592 | ||
593 | /* real server options */ | |
594 | unsigned conn_flags; /* connection flags */ | |
595 | int weight; /* destination weight */ | |
596 | ||
597 | /* thresholds for active connections */ | |
598 | u32 u_threshold; /* upper threshold */ | |
599 | u32 l_threshold; /* lower threshold */ | |
600 | }; | |
601 | ||
602 | ||
1da177e4 LT |
603 | /* |
604 | * The information about the virtual service offered to the net | |
605 | * and the forwarding entries | |
606 | */ | |
607 | struct ip_vs_service { | |
608 | struct list_head s_list; /* for normal service table */ | |
609 | struct list_head f_list; /* for fwmark-based service table */ | |
610 | atomic_t refcnt; /* reference counter */ | |
611 | atomic_t usecnt; /* use counter */ | |
612 | ||
e7ade46a | 613 | u16 af; /* address family */ |
1da177e4 | 614 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 615 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 616 | __be16 port; /* port number for the service */ |
1da177e4 LT |
617 | __u32 fwmark; /* firewall mark of the service */ |
618 | unsigned flags; /* service status flags */ | |
619 | unsigned timeout; /* persistent timeout in ticks */ | |
014d730d | 620 | __be32 netmask; /* grouping granularity */ |
fc723250 | 621 | struct net *net; |
1da177e4 LT |
622 | |
623 | struct list_head destinations; /* real server d-linked list */ | |
624 | __u32 num_dests; /* number of servers */ | |
625 | struct ip_vs_stats stats; /* statistics for the service */ | |
626 | struct ip_vs_app *inc; /* bind conns to this app inc */ | |
627 | ||
628 | /* for scheduling */ | |
629 | struct ip_vs_scheduler *scheduler; /* bound scheduler object */ | |
630 | rwlock_t sched_lock; /* lock sched_data */ | |
631 | void *sched_data; /* scheduler application data */ | |
85999283 SH |
632 | |
633 | /* alternate persistence engine */ | |
634 | struct ip_vs_pe *pe; | |
1da177e4 LT |
635 | }; |
636 | ||
637 | ||
638 | /* | |
639 | * The real server destination forwarding entry | |
640 | * with ip address, port number, and so on. | |
641 | */ | |
642 | struct ip_vs_dest { | |
643 | struct list_head n_list; /* for the dests in the service */ | |
644 | struct list_head d_list; /* for table with all the dests */ | |
645 | ||
e7ade46a | 646 | u16 af; /* address family */ |
014d730d | 647 | __be16 port; /* port number of the server */ |
f2431e6e | 648 | union nf_inet_addr addr; /* IP address of the server */ |
1da177e4 LT |
649 | volatile unsigned flags; /* dest status flags */ |
650 | atomic_t conn_flags; /* flags to copy to conn */ | |
651 | atomic_t weight; /* server weight */ | |
652 | ||
653 | atomic_t refcnt; /* reference counter */ | |
654 | struct ip_vs_stats stats; /* statistics */ | |
655 | ||
656 | /* connection counters and thresholds */ | |
657 | atomic_t activeconns; /* active connections */ | |
658 | atomic_t inactconns; /* inactive connections */ | |
659 | atomic_t persistconns; /* persistent connections */ | |
660 | __u32 u_threshold; /* upper threshold */ | |
661 | __u32 l_threshold; /* lower threshold */ | |
662 | ||
663 | /* for destination cache */ | |
664 | spinlock_t dst_lock; /* lock of dst_cache */ | |
665 | struct dst_entry *dst_cache; /* destination cache entry */ | |
666 | u32 dst_rtos; /* RT_TOS(tos) for dst */ | |
714f095f | 667 | u32 dst_cookie; |
c92f5ca2 | 668 | union nf_inet_addr dst_saddr; |
1da177e4 LT |
669 | |
670 | /* for virtual service */ | |
671 | struct ip_vs_service *svc; /* service it belongs to */ | |
672 | __u16 protocol; /* which protocol (TCP/UDP) */ | |
014d730d | 673 | __be16 vport; /* virtual port number */ |
f2431e6e | 674 | union nf_inet_addr vaddr; /* virtual IP address */ |
1da177e4 LT |
675 | __u32 vfwmark; /* firewall mark of service */ |
676 | }; | |
677 | ||
678 | ||
679 | /* | |
680 | * The scheduler object | |
681 | */ | |
682 | struct ip_vs_scheduler { | |
683 | struct list_head n_list; /* d-linked list head */ | |
684 | char *name; /* scheduler name */ | |
685 | atomic_t refcnt; /* reference counter */ | |
686 | struct module *module; /* THIS_MODULE/NULL */ | |
687 | ||
688 | /* scheduler initializing service */ | |
689 | int (*init_service)(struct ip_vs_service *svc); | |
690 | /* scheduling service finish */ | |
691 | int (*done_service)(struct ip_vs_service *svc); | |
692 | /* scheduler updating service */ | |
693 | int (*update_service)(struct ip_vs_service *svc); | |
694 | ||
695 | /* selecting a server from the given service */ | |
696 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
697 | const struct sk_buff *skb); | |
698 | }; | |
699 | ||
85999283 SH |
700 | /* The persistence engine object */ |
701 | struct ip_vs_pe { | |
702 | struct list_head n_list; /* d-linked list head */ | |
703 | char *name; /* scheduler name */ | |
704 | atomic_t refcnt; /* reference counter */ | |
705 | struct module *module; /* THIS_MODULE/NULL */ | |
706 | ||
707 | /* get the connection template, if any */ | |
708 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
709 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
710 | struct ip_vs_conn *ct); | |
711 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
712 | bool inverse); | |
a3c918ac | 713 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
85999283 | 714 | }; |
1da177e4 LT |
715 | |
716 | /* | |
717 | * The application module object (a.k.a. app incarnation) | |
718 | */ | |
fd2c3ef7 | 719 | struct ip_vs_app { |
1da177e4 LT |
720 | struct list_head a_list; /* member in app list */ |
721 | int type; /* IP_VS_APP_TYPE_xxx */ | |
722 | char *name; /* application module name */ | |
723 | __u16 protocol; | |
724 | struct module *module; /* THIS_MODULE/NULL */ | |
725 | struct list_head incs_list; /* list of incarnations */ | |
726 | ||
727 | /* members for application incarnations */ | |
728 | struct list_head p_list; /* member in proto app list */ | |
729 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 730 | __be16 port; /* port number in net order */ |
1da177e4 LT |
731 | atomic_t usecnt; /* usage counter */ |
732 | ||
8b27b10f JA |
733 | /* |
734 | * output hook: Process packet in inout direction, diff set for TCP. | |
735 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
736 | * 2=Mangled but checksum was not updated | |
737 | */ | |
1da177e4 | 738 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 739 | struct sk_buff *, int *diff); |
1da177e4 | 740 | |
8b27b10f JA |
741 | /* |
742 | * input hook: Process packet in outin direction, diff set for TCP. | |
743 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, | |
744 | * 2=Mangled but checksum was not updated | |
745 | */ | |
1da177e4 | 746 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 747 | struct sk_buff *, int *diff); |
1da177e4 LT |
748 | |
749 | /* ip_vs_app initializer */ | |
750 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
751 | ||
752 | /* ip_vs_app finish */ | |
753 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
754 | ||
755 | ||
756 | /* not used now */ | |
757 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
758 | struct ip_vs_protocol *); | |
759 | ||
760 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
761 | ||
762 | int * timeout_table; | |
763 | int * timeouts; | |
764 | int timeouts_size; | |
765 | ||
766 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
767 | int *verdict, struct ip_vs_conn **cpp); | |
768 | ||
769 | struct ip_vs_conn * | |
770 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
771 | const struct iphdr *iph, unsigned int proto_off, | |
772 | int inverse); | |
773 | ||
774 | struct ip_vs_conn * | |
775 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
776 | const struct iphdr *iph, unsigned int proto_off, | |
777 | int inverse); | |
778 | ||
779 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
780 | const struct sk_buff *skb, | |
781 | struct ip_vs_app *app); | |
782 | ||
783 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
784 | }; | |
785 | ||
2553d064 JA |
786 | /* IPVS in network namespace */ |
787 | struct netns_ipvs { | |
788 | int gen; /* Generation */ | |
7a4f0761 | 789 | int enable; /* enable like nf_hooks do */ |
2553d064 JA |
790 | /* |
791 | * Hash table: for real service lookups | |
792 | */ | |
793 | #define IP_VS_RTAB_BITS 4 | |
794 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
795 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
796 | ||
797 | struct list_head rs_table[IP_VS_RTAB_SIZE]; | |
798 | /* ip_vs_app */ | |
799 | struct list_head app_list; | |
c74c0bfe HS |
800 | /* ip_vs_ftp */ |
801 | struct ip_vs_app *ftp_app; | |
2553d064 JA |
802 | /* ip_vs_proto */ |
803 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
804 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
805 | /* ip_vs_proto_tcp */ | |
806 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
807 | #define TCP_APP_TAB_BITS 4 | |
808 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
809 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
810 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
811 | spinlock_t tcp_app_lock; | |
812 | #endif | |
813 | /* ip_vs_proto_udp */ | |
814 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
815 | #define UDP_APP_TAB_BITS 4 | |
816 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
817 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
818 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
819 | spinlock_t udp_app_lock; | |
820 | #endif | |
821 | /* ip_vs_proto_sctp */ | |
822 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
823 | #define SCTP_APP_TAB_BITS 4 | |
824 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
825 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
826 | /* Hash table for SCTP application incarnations */ | |
827 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
828 | spinlock_t sctp_app_lock; | |
829 | #endif | |
830 | /* ip_vs_conn */ | |
831 | atomic_t conn_count; /* connection counter */ | |
832 | ||
833 | /* ip_vs_ctl */ | |
2a0751af | 834 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
2553d064 JA |
835 | |
836 | int num_services; /* no of virtual services */ | |
f2247fbd SH |
837 | |
838 | rwlock_t rs_lock; /* real services table */ | |
f2247fbd SH |
839 | /* Trash for destinations */ |
840 | struct list_head dest_trash; | |
841 | /* Service counters */ | |
842 | atomic_t ftpsvc_counter; | |
843 | atomic_t nullsvc_counter; | |
844 | ||
845 | #ifdef CONFIG_SYSCTL | |
2553d064 JA |
846 | /* 1/rate drop and drop-entry variables */ |
847 | struct delayed_work defense_work; /* Work handler */ | |
848 | int drop_rate; | |
849 | int drop_counter; | |
850 | atomic_t dropentry; | |
851 | /* locks in ctl.c */ | |
852 | spinlock_t dropentry_lock; /* drop entry handling */ | |
853 | spinlock_t droppacket_lock; /* drop packet handling */ | |
854 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
855 | |
856 | /* sys-ctl struct */ | |
857 | struct ctl_table_header *sysctl_hdr; | |
858 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
859 | #endif |
860 | ||
2553d064 JA |
861 | /* sysctl variables */ |
862 | int sysctl_amemthresh; | |
863 | int sysctl_am_droprate; | |
864 | int sysctl_drop_entry; | |
865 | int sysctl_drop_packet; | |
866 | int sysctl_secure_tcp; | |
867 | #ifdef CONFIG_IP_VS_NFCT | |
868 | int sysctl_conntrack; | |
869 | #endif | |
870 | int sysctl_snat_reroute; | |
871 | int sysctl_sync_ver; | |
872 | int sysctl_cache_bypass; | |
873 | int sysctl_expire_nodest_conn; | |
874 | int sysctl_expire_quiescent_template; | |
875 | int sysctl_sync_threshold[2]; | |
876 | int sysctl_nat_icmp_send; | |
877 | ||
878 | /* ip_vs_lblc */ | |
879 | int sysctl_lblc_expiration; | |
880 | struct ctl_table_header *lblc_ctl_header; | |
881 | struct ctl_table *lblc_ctl_table; | |
882 | /* ip_vs_lblcr */ | |
883 | int sysctl_lblcr_expiration; | |
884 | struct ctl_table_header *lblcr_ctl_header; | |
885 | struct ctl_table *lblcr_ctl_table; | |
886 | /* ip_vs_est */ | |
887 | struct list_head est_list; /* estimator list */ | |
888 | spinlock_t est_lock; | |
889 | struct timer_list est_timer; /* Estimation timer */ | |
890 | /* ip_vs_sync */ | |
891 | struct list_head sync_queue; | |
892 | spinlock_t sync_lock; | |
893 | struct ip_vs_sync_buff *sync_buff; | |
894 | spinlock_t sync_buff_lock; | |
895 | struct sockaddr_in sync_mcast_addr; | |
896 | struct task_struct *master_thread; | |
897 | struct task_struct *backup_thread; | |
898 | int send_mesg_maxlen; | |
899 | int recv_mesg_maxlen; | |
900 | volatile int sync_state; | |
901 | volatile int master_syncid; | |
902 | volatile int backup_syncid; | |
903 | /* multicast interface name */ | |
904 | char master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
905 | char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
906 | /* net name space ptr */ | |
907 | struct net *net; /* Needed by timer routines */ | |
908 | }; | |
1da177e4 | 909 | |
59e0350e SH |
910 | #define DEFAULT_SYNC_THRESHOLD 3 |
911 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 912 | #define DEFAULT_SYNC_VER 1 |
59e0350e SH |
913 | |
914 | #ifdef CONFIG_SYSCTL | |
915 | ||
916 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
917 | { | |
918 | return ipvs->sysctl_sync_threshold[0]; | |
919 | } | |
920 | ||
921 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
922 | { | |
923 | return ipvs->sysctl_sync_threshold[1]; | |
924 | } | |
925 | ||
7532e8d4 SH |
926 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
927 | { | |
928 | return ipvs->sysctl_sync_ver; | |
929 | } | |
930 | ||
59e0350e SH |
931 | #else |
932 | ||
933 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
934 | { | |
935 | return DEFAULT_SYNC_THRESHOLD; | |
936 | } | |
937 | ||
938 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
939 | { | |
940 | return DEFAULT_SYNC_PERIOD; | |
941 | } | |
942 | ||
7532e8d4 SH |
943 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
944 | { | |
945 | return DEFAULT_SYNC_VER; | |
946 | } | |
947 | ||
59e0350e SH |
948 | #endif |
949 | ||
1da177e4 LT |
950 | /* |
951 | * IPVS core functions | |
952 | * (from ip_vs_core.c) | |
953 | */ | |
954 | extern const char *ip_vs_proto_name(unsigned proto); | |
955 | extern void ip_vs_init_hash_table(struct list_head *table, int rows); | |
afdd6140 | 956 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 957 | |
1da177e4 LT |
958 | #define IP_VS_APP_TYPE_FTP 1 |
959 | ||
960 | /* | |
961 | * ip_vs_conn handling functions | |
962 | * (from ip_vs_conn.c) | |
963 | */ | |
964 | ||
1da177e4 LT |
965 | enum { |
966 | IP_VS_DIR_INPUT = 0, | |
967 | IP_VS_DIR_OUTPUT, | |
968 | IP_VS_DIR_INPUT_ONLY, | |
969 | IP_VS_DIR_LAST, | |
970 | }; | |
971 | ||
6e67e586 | 972 | static inline void ip_vs_conn_fill_param(struct net *net, int af, int protocol, |
f11017ec SH |
973 | const union nf_inet_addr *caddr, |
974 | __be16 cport, | |
975 | const union nf_inet_addr *vaddr, | |
976 | __be16 vport, | |
977 | struct ip_vs_conn_param *p) | |
978 | { | |
6e67e586 | 979 | p->net = net; |
f11017ec SH |
980 | p->af = af; |
981 | p->protocol = protocol; | |
982 | p->caddr = caddr; | |
983 | p->cport = cport; | |
984 | p->vaddr = vaddr; | |
985 | p->vport = vport; | |
85999283 SH |
986 | p->pe = NULL; |
987 | p->pe_data = NULL; | |
f11017ec | 988 | } |
28364a59 | 989 | |
f11017ec SH |
990 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
991 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 992 | |
5c0d2374 | 993 | struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb, |
5c0d2374 SH |
994 | const struct ip_vs_iphdr *iph, |
995 | unsigned int proto_off, | |
996 | int inverse); | |
997 | ||
f11017ec | 998 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 999 | |
5c0d2374 | 1000 | struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb, |
5c0d2374 SH |
1001 | const struct ip_vs_iphdr *iph, |
1002 | unsigned int proto_off, | |
1003 | int inverse); | |
1004 | ||
1da177e4 LT |
1005 | /* put back the conn without restarting its timer */ |
1006 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1007 | { | |
1008 | atomic_dec(&cp->refcnt); | |
1009 | } | |
1010 | extern void ip_vs_conn_put(struct ip_vs_conn *cp); | |
014d730d | 1011 | extern void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); |
1da177e4 | 1012 | |
f11017ec SH |
1013 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, |
1014 | const union nf_inet_addr *daddr, | |
1015 | __be16 dport, unsigned flags, | |
0e051e68 | 1016 | struct ip_vs_dest *dest, __u32 fwmark); |
1da177e4 LT |
1017 | extern void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1018 | ||
1019 | extern const char * ip_vs_state_name(__u16 proto, int state); | |
1020 | ||
4a85b96c | 1021 | extern void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp); |
1da177e4 | 1022 | extern int ip_vs_check_template(struct ip_vs_conn *ct); |
f6340ee0 | 1023 | extern void ip_vs_random_dropentry(struct net *net); |
1da177e4 LT |
1024 | extern int ip_vs_conn_init(void); |
1025 | extern void ip_vs_conn_cleanup(void); | |
1026 | ||
1027 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1028 | { | |
1029 | struct ip_vs_conn *ctl_cp = cp->control; | |
1030 | if (!ctl_cp) { | |
cfc78c5a JV |
1031 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
1032 | "%s:%d to %s:%d\n", | |
1033 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1034 | ntohs(cp->cport), | |
1035 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1036 | ntohs(cp->vport)); | |
1037 | ||
1da177e4 LT |
1038 | return; |
1039 | } | |
1040 | ||
cfc78c5a JV |
1041 | IP_VS_DBG_BUF(7, "DELeting control for: " |
1042 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1043 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1044 | ntohs(cp->cport), | |
1045 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1046 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1047 | |
1048 | cp->control = NULL; | |
1049 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1050 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1051 | "%s:%d to %s:%d\n", | |
1052 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1053 | ntohs(cp->cport), | |
1054 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1055 | ntohs(cp->vport)); | |
1056 | ||
1da177e4 LT |
1057 | return; |
1058 | } | |
1059 | atomic_dec(&ctl_cp->n_control); | |
1060 | } | |
1061 | ||
1062 | static inline void | |
1063 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1064 | { | |
1065 | if (cp->control) { | |
cfc78c5a JV |
1066 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
1067 | "%s:%d to %s:%d\n", | |
1068 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1069 | ntohs(cp->cport), | |
1070 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1071 | ntohs(cp->vport)); | |
1072 | ||
1da177e4 LT |
1073 | ip_vs_control_del(cp); |
1074 | } | |
1075 | ||
cfc78c5a JV |
1076 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1077 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1078 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1079 | ntohs(cp->cport), | |
1080 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1081 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1082 | |
1083 | cp->control = ctl_cp; | |
1084 | atomic_inc(&ctl_cp->n_control); | |
1085 | } | |
1086 | ||
7a4f0761 HS |
1087 | /* |
1088 | * IPVS netns init & cleanup functions | |
1089 | */ | |
503cf15a HS |
1090 | extern int ip_vs_estimator_net_init(struct net *net); |
1091 | extern int ip_vs_control_net_init(struct net *net); | |
1092 | extern int ip_vs_protocol_net_init(struct net *net); | |
1093 | extern int ip_vs_app_net_init(struct net *net); | |
1094 | extern int ip_vs_conn_net_init(struct net *net); | |
1095 | extern int ip_vs_sync_net_init(struct net *net); | |
1096 | extern void ip_vs_conn_net_cleanup(struct net *net); | |
1097 | extern void ip_vs_app_net_cleanup(struct net *net); | |
1098 | extern void ip_vs_protocol_net_cleanup(struct net *net); | |
1099 | extern void ip_vs_control_net_cleanup(struct net *net); | |
1100 | extern void ip_vs_estimator_net_cleanup(struct net *net); | |
1101 | extern void ip_vs_sync_net_cleanup(struct net *net); | |
1102 | extern void ip_vs_service_net_cleanup(struct net *net); | |
1da177e4 LT |
1103 | |
1104 | /* | |
1105 | * IPVS application functions | |
1106 | * (from ip_vs_app.c) | |
1107 | */ | |
1108 | #define IP_VS_APP_MAX_PORTS 8 | |
ab8a5e84 HS |
1109 | extern int register_ip_vs_app(struct net *net, struct ip_vs_app *app); |
1110 | extern void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app); | |
1da177e4 LT |
1111 | extern int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
1112 | extern void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
ab8a5e84 HS |
1113 | extern int register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app, |
1114 | __u16 proto, __u16 port); | |
1da177e4 LT |
1115 | extern int ip_vs_app_inc_get(struct ip_vs_app *inc); |
1116 | extern void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1117 | ||
3db05fea HX |
1118 | extern int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); |
1119 | extern int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
1da177e4 | 1120 | |
8be67a66 SH |
1121 | void ip_vs_bind_pe(struct ip_vs_service *svc, struct ip_vs_pe *pe); |
1122 | void ip_vs_unbind_pe(struct ip_vs_service *svc); | |
1123 | int register_ip_vs_pe(struct ip_vs_pe *pe); | |
1124 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1125 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1126 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 SH |
1127 | |
1128 | static inline void ip_vs_pe_get(const struct ip_vs_pe *pe) | |
1129 | { | |
1130 | if (pe && pe->module) | |
1131 | __module_get(pe->module); | |
1132 | } | |
1133 | ||
1134 | static inline void ip_vs_pe_put(const struct ip_vs_pe *pe) | |
1135 | { | |
1136 | if (pe && pe->module) | |
1137 | module_put(pe->module); | |
1138 | } | |
1da177e4 LT |
1139 | |
1140 | /* | |
1141 | * IPVS protocol functions (from ip_vs_proto.c) | |
1142 | */ | |
1143 | extern int ip_vs_protocol_init(void); | |
1144 | extern void ip_vs_protocol_cleanup(void); | |
9330419d | 1145 | extern void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); |
1da177e4 LT |
1146 | extern int *ip_vs_create_timeout_table(int *table, int size); |
1147 | extern int | |
36cbd3dc JE |
1148 | ip_vs_set_state_timeout(int *table, int num, const char *const *names, |
1149 | const char *name, int to); | |
1da177e4 | 1150 | extern void |
0d79641a JA |
1151 | ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
1152 | const struct sk_buff *skb, | |
1da177e4 LT |
1153 | int offset, const char *msg); |
1154 | ||
1155 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1156 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1157 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1158 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1159 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1160 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 LT |
1161 | |
1162 | /* | |
1163 | * Registering/unregistering scheduler functions | |
1164 | * (from ip_vs_sched.c) | |
1165 | */ | |
1166 | extern int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1167 | extern int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1168 | extern int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1169 | struct ip_vs_scheduler *scheduler); | |
1170 | extern int ip_vs_unbind_scheduler(struct ip_vs_service *svc); | |
1171 | extern struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1172 | extern void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1173 | extern struct ip_vs_conn * | |
190ecd27 | 1174 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
9330419d | 1175 | struct ip_vs_proto_data *pd, int *ignored); |
1da177e4 | 1176 | extern int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
9330419d | 1177 | struct ip_vs_proto_data *pd); |
1da177e4 | 1178 | |
41ac51ee PS |
1179 | extern void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
1180 | ||
1da177e4 LT |
1181 | |
1182 | /* | |
1183 | * IPVS control data and functions (from ip_vs_ctl.c) | |
1184 | */ | |
1da177e4 | 1185 | extern struct ip_vs_stats ip_vs_stats; |
5587da55 | 1186 | extern const struct ctl_path net_vs_ctl_path[]; |
b880c1f0 | 1187 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 | 1188 | |
f131315f | 1189 | extern void ip_vs_sync_switch_mode(struct net *net, int mode); |
1da177e4 | 1190 | extern struct ip_vs_service * |
fc723250 | 1191 | ip_vs_service_get(struct net *net, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1192 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 LT |
1193 | |
1194 | static inline void ip_vs_service_put(struct ip_vs_service *svc) | |
1195 | { | |
1196 | atomic_dec(&svc->usecnt); | |
1197 | } | |
1198 | ||
1199 | extern struct ip_vs_dest * | |
fc723250 | 1200 | ip_vs_lookup_real_service(struct net *net, int af, __u16 protocol, |
7937df15 JV |
1201 | const union nf_inet_addr *daddr, __be16 dport); |
1202 | ||
1da177e4 LT |
1203 | extern int ip_vs_use_count_inc(void); |
1204 | extern void ip_vs_use_count_dec(void); | |
1205 | extern int ip_vs_control_init(void); | |
1206 | extern void ip_vs_control_cleanup(void); | |
1e356f9c | 1207 | extern struct ip_vs_dest * |
fc723250 HS |
1208 | ip_vs_find_dest(struct net *net, int af, const union nf_inet_addr *daddr, |
1209 | __be16 dport, const union nf_inet_addr *vaddr, __be16 vport, | |
1210 | __u16 protocol, __u32 fwmark); | |
1e356f9c | 1211 | extern struct ip_vs_dest *ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 LT |
1212 | |
1213 | ||
1214 | /* | |
1215 | * IPVS sync daemon data and function prototypes | |
1216 | * (from ip_vs_sync.c) | |
1217 | */ | |
f131315f HS |
1218 | extern int start_sync_thread(struct net *net, int state, char *mcast_ifn, |
1219 | __u8 syncid); | |
1220 | extern int stop_sync_thread(struct net *net, int state); | |
1221 | extern void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp); | |
1da177e4 LT |
1222 | |
1223 | ||
1224 | /* | |
1225 | * IPVS rate estimator prototypes (from ip_vs_est.c) | |
1226 | */ | |
6ef757f9 JA |
1227 | extern void ip_vs_start_estimator(struct net *net, struct ip_vs_stats *stats); |
1228 | extern void ip_vs_stop_estimator(struct net *net, struct ip_vs_stats *stats); | |
1da177e4 | 1229 | extern void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
ea9f22cc JA |
1230 | extern void ip_vs_read_estimator(struct ip_vs_stats_user *dst, |
1231 | struct ip_vs_stats *stats); | |
1da177e4 LT |
1232 | |
1233 | /* | |
1234 | * Various IPVS packet transmitters (from ip_vs_xmit.c) | |
1235 | */ | |
1236 | extern int ip_vs_null_xmit | |
1237 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1238 | extern int ip_vs_bypass_xmit | |
1239 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1240 | extern int ip_vs_nat_xmit | |
1241 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1242 | extern int ip_vs_tunnel_xmit | |
1243 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1244 | extern int ip_vs_dr_xmit | |
1245 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1246 | extern int ip_vs_icmp_xmit | |
c92f5ca2 JA |
1247 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, |
1248 | int offset, unsigned int hooknum); | |
1da177e4 LT |
1249 | extern void ip_vs_dst_reset(struct ip_vs_dest *dest); |
1250 | ||
b3cdd2a7 JV |
1251 | #ifdef CONFIG_IP_VS_IPV6 |
1252 | extern int ip_vs_bypass_xmit_v6 | |
1253 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1254 | extern int ip_vs_nat_xmit_v6 | |
1255 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1256 | extern int ip_vs_tunnel_xmit_v6 | |
1257 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1258 | extern int ip_vs_dr_xmit_v6 | |
1259 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1260 | extern int ip_vs_icmp_xmit_v6 | |
1261 | (struct sk_buff *skb, struct ip_vs_conn *cp, struct ip_vs_protocol *pp, | |
c92f5ca2 | 1262 | int offset, unsigned int hooknum); |
b3cdd2a7 | 1263 | #endif |
1da177e4 | 1264 | |
3a1bbf18 | 1265 | #ifdef CONFIG_SYSCTL |
1da177e4 LT |
1266 | /* |
1267 | * This is a simple mechanism to ignore packets when | |
1268 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1269 | * we start to drop 1/rate of the packets | |
1270 | */ | |
1da177e4 | 1271 | |
a0840e2e | 1272 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1273 | { |
a0840e2e HS |
1274 | if (!ipvs->drop_rate) |
1275 | return 0; | |
1276 | if (--ipvs->drop_counter > 0) | |
1277 | return 0; | |
1278 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1279 | return 1; |
1280 | } | |
3a1bbf18 SH |
1281 | #else |
1282 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1283 | #endif | |
1da177e4 LT |
1284 | |
1285 | /* | |
1286 | * ip_vs_fwd_tag returns the forwarding tag of the connection | |
1287 | */ | |
1288 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) | |
1289 | ||
732db659 | 1290 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1291 | { |
1292 | char fwd; | |
1293 | ||
1294 | switch (IP_VS_FWD_METHOD(cp)) { | |
1295 | case IP_VS_CONN_F_MASQ: | |
1296 | fwd = 'M'; break; | |
1297 | case IP_VS_CONN_F_LOCALNODE: | |
1298 | fwd = 'L'; break; | |
1299 | case IP_VS_CONN_F_TUNNEL: | |
1300 | fwd = 'T'; break; | |
1301 | case IP_VS_CONN_F_DROUTE: | |
1302 | fwd = 'R'; break; | |
1303 | case IP_VS_CONN_F_BYPASS: | |
1304 | fwd = 'B'; break; | |
1305 | default: | |
1306 | fwd = '?'; break; | |
1307 | } | |
1308 | return fwd; | |
1309 | } | |
1310 | ||
1da177e4 | 1311 | extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
b3cdd2a7 JV |
1312 | struct ip_vs_conn *cp, int dir); |
1313 | ||
1314 | #ifdef CONFIG_IP_VS_IPV6 | |
1315 | extern void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, | |
1316 | struct ip_vs_conn *cp, int dir); | |
1317 | #endif | |
1da177e4 | 1318 | |
b1550f22 | 1319 | extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1320 | |
f9214b26 | 1321 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1322 | { |
f9214b26 | 1323 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1324 | |
07f0757a | 1325 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1326 | } |
1327 | ||
0bbdd42b JV |
1328 | #ifdef CONFIG_IP_VS_IPV6 |
1329 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1330 | __wsum oldsum) | |
1331 | { | |
1332 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1333 | new[3], new[2], new[1], new[0] }; | |
1334 | ||
07f0757a | 1335 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1336 | } |
1337 | #endif | |
1338 | ||
f9214b26 AV |
1339 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1340 | { | |
1341 | __be16 diff[2] = { ~old, new }; | |
1342 | ||
07f0757a | 1343 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1344 | } |
1345 | ||
cf356d69 JA |
1346 | /* |
1347 | * Forget current conntrack (unconfirmed) and attach notrack entry | |
1348 | */ | |
1349 | static inline void ip_vs_notrack(struct sk_buff *skb) | |
1350 | { | |
1351 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1352 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1353 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 JA |
1354 | |
1355 | if (!ct || !nf_ct_is_untracked(ct)) { | |
1356 | nf_reset(skb); | |
1357 | skb->nfct = &nf_ct_untracked_get()->ct_general; | |
1358 | skb->nfctinfo = IP_CT_NEW; | |
1359 | nf_conntrack_get(skb->nfct); | |
1360 | } | |
1361 | #endif | |
1362 | } | |
1363 | ||
f4bc17cd JA |
1364 | #ifdef CONFIG_IP_VS_NFCT |
1365 | /* | |
1366 | * Netfilter connection tracking | |
1367 | * (from ip_vs_nfct.c) | |
1368 | */ | |
a0840e2e | 1369 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1370 | { |
a4e2f5a7 | 1371 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1372 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1373 | #else |
1374 | return 0; | |
1375 | #endif | |
f4bc17cd JA |
1376 | } |
1377 | ||
6523ce15 JA |
1378 | extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1379 | int outin); | |
f4bc17cd JA |
1380 | extern int ip_vs_confirm_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp); |
1381 | extern void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1382 | struct ip_vs_conn *cp, u_int8_t proto, | |
1383 | const __be16 port, int from_rs); | |
1384 | extern void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
1385 | ||
1386 | #else | |
1387 | ||
a0840e2e | 1388 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1389 | { |
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1394 | struct ip_vs_conn *cp, int outin) | |
1395 | { | |
1396 | } | |
1397 | ||
1398 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb, | |
1399 | struct ip_vs_conn *cp) | |
1400 | { | |
1401 | return NF_ACCEPT; | |
1402 | } | |
1403 | ||
1404 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1405 | { | |
1406 | } | |
1407 | /* CONFIG_IP_VS_NFCT */ | |
1408 | #endif | |
6523ce15 | 1409 | |
b552f7e3 CG |
1410 | static inline unsigned int |
1411 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) | |
1412 | { | |
1413 | /* | |
1414 | * We think the overhead of processing active connections is 256 | |
1415 | * times higher than that of inactive connections in average. (This | |
1416 | * 256 times might not be accurate, we will change it later) We | |
1417 | * use the following formula to estimate the overhead now: | |
1418 | * dest->activeconns*256 + dest->inactconns | |
1419 | */ | |
1420 | return (atomic_read(&dest->activeconns) << 8) + | |
1421 | atomic_read(&dest->inactconns); | |
1422 | } | |
1423 | ||
bc4768eb | 1424 | #endif /* _NET_IP_VS_H */ |