Commit | Line | Data |
---|---|---|
07dcc686 SH |
1 | /* IP Virtual Server |
2 | * data structure and functionality definitions | |
1da177e4 LT |
3 | */ |
4 | ||
bc4768eb JV |
5 | #ifndef _NET_IP_VS_H |
6 | #define _NET_IP_VS_H | |
1da177e4 | 7 | |
bc4768eb | 8 | #include <linux/ip_vs.h> /* definitions shared with userland */ |
1da177e4 | 9 | |
bc4768eb JV |
10 | #include <asm/types.h> /* for __uXX types */ |
11 | ||
1da177e4 LT |
12 | #include <linux/list.h> /* for struct list_head */ |
13 | #include <linux/spinlock.h> /* for struct rwlock_t */ | |
07dcc686 | 14 | #include <linux/atomic.h> /* for struct atomic_t */ |
1da177e4 | 15 | #include <linux/compiler.h> |
14c85021 | 16 | #include <linux/timer.h> |
187f1882 | 17 | #include <linux/bug.h> |
1da177e4 | 18 | |
14c85021 | 19 | #include <net/checksum.h> |
e7ade46a | 20 | #include <linux/netfilter.h> /* for union nf_inet_addr */ |
1668e010 | 21 | #include <linux/ip.h> |
e7ade46a | 22 | #include <linux/ipv6.h> /* for struct ipv6hdr */ |
4e3fd7a0 | 23 | #include <net/ipv6.h> |
54d83efa | 24 | #if IS_ENABLED(CONFIG_IP_VS_IPV6) |
63dca2c0 JDB |
25 | #include <linux/netfilter_ipv6/ip6_tables.h> |
26 | #endif | |
a638e514 | 27 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
f4bc17cd JA |
28 | #include <net/netfilter/nf_conntrack.h> |
29 | #endif | |
61b1ab45 HS |
30 | #include <net/net_namespace.h> /* Netw namespace */ |
31 | ||
07dcc686 | 32 | /* Generic access of ipvs struct */ |
61b1ab45 HS |
33 | static inline struct netns_ipvs *net_ipvs(struct net* net) |
34 | { | |
35 | return net->ipvs; | |
36 | } | |
07dcc686 SH |
37 | |
38 | /* Get net ptr from skb in traffic cases | |
fc723250 HS |
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 | } | |
07dcc686 SH |
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 | ||
64aae3cb | 106 | struct ip_vs_iphdr { |
63dca2c0 | 107 | __u32 len; /* IPv4 simply where L4 starts |
07dcc686 | 108 | * IPv6 where L4 Transport Header starts */ |
63dca2c0 JDB |
109 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ |
110 | __s16 protocol; | |
111 | __s32 flags; | |
64aae3cb JV |
112 | union nf_inet_addr saddr; |
113 | union nf_inet_addr daddr; | |
114 | }; | |
115 | ||
2f74713d JDB |
116 | static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, |
117 | int len, void *buffer, | |
118 | const struct ip_vs_iphdr *ipvsh) | |
119 | { | |
120 | return skb_header_pointer(skb, offset, len, buffer); | |
121 | } | |
2f74713d | 122 | |
64aae3cb | 123 | static inline void |
63dca2c0 JDB |
124 | ip_vs_fill_ip4hdr(const void *nh, struct ip_vs_iphdr *iphdr) |
125 | { | |
126 | const struct iphdr *iph = nh; | |
127 | ||
128 | iphdr->len = iph->ihl * 4; | |
129 | iphdr->fragoffs = 0; | |
130 | iphdr->protocol = iph->protocol; | |
131 | iphdr->saddr.ip = iph->saddr; | |
132 | iphdr->daddr.ip = iph->daddr; | |
133 | } | |
134 | ||
135 | /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. | |
136 | * IPv6 requires some extra work, as finding proper header position, | |
137 | * depend on the IPv6 extension headers. | |
138 | */ | |
139 | static inline void | |
140 | ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, struct ip_vs_iphdr *iphdr) | |
64aae3cb JV |
141 | { |
142 | #ifdef CONFIG_IP_VS_IPV6 | |
143 | if (af == AF_INET6) { | |
63dca2c0 JDB |
144 | const struct ipv6hdr *iph = |
145 | (struct ipv6hdr *)skb_network_header(skb); | |
4e3fd7a0 AD |
146 | iphdr->saddr.in6 = iph->saddr; |
147 | iphdr->daddr.in6 = iph->daddr; | |
6aafeef0 | 148 | /* ipv6_find_hdr() updates len, flags */ |
63dca2c0 JDB |
149 | iphdr->len = 0; |
150 | iphdr->flags = 0; | |
151 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
152 | &iphdr->fragoffs, | |
153 | &iphdr->flags); | |
64aae3cb JV |
154 | } else |
155 | #endif | |
156 | { | |
63dca2c0 JDB |
157 | const struct iphdr *iph = |
158 | (struct iphdr *)skb_network_header(skb); | |
159 | iphdr->len = iph->ihl * 4; | |
160 | iphdr->fragoffs = 0; | |
161 | iphdr->protocol = iph->protocol; | |
162 | iphdr->saddr.ip = iph->saddr; | |
163 | iphdr->daddr.ip = iph->daddr; | |
164 | } | |
165 | } | |
166 | ||
64aae3cb JV |
167 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, |
168 | const union nf_inet_addr *src) | |
169 | { | |
170 | #ifdef CONFIG_IP_VS_IPV6 | |
171 | if (af == AF_INET6) | |
4e3fd7a0 | 172 | dst->in6 = src->in6; |
64aae3cb JV |
173 | else |
174 | #endif | |
175 | dst->ip = src->ip; | |
176 | } | |
177 | ||
9a05475c JA |
178 | static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst, |
179 | const union nf_inet_addr *src) | |
180 | { | |
181 | #ifdef CONFIG_IP_VS_IPV6 | |
182 | if (af == AF_INET6) { | |
183 | dst->in6 = src->in6; | |
184 | return; | |
185 | } | |
186 | #endif | |
187 | dst->ip = src->ip; | |
188 | dst->all[1] = 0; | |
189 | dst->all[2] = 0; | |
190 | dst->all[3] = 0; | |
191 | } | |
192 | ||
64aae3cb JV |
193 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, |
194 | const union nf_inet_addr *b) | |
195 | { | |
196 | #ifdef CONFIG_IP_VS_IPV6 | |
197 | if (af == AF_INET6) | |
198 | return ipv6_addr_equal(&a->in6, &b->in6); | |
199 | #endif | |
200 | return a->ip == b->ip; | |
201 | } | |
202 | ||
1da177e4 | 203 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
204 | #include <linux/net.h> |
205 | ||
5c3a0fd7 | 206 | int ip_vs_get_debug_level(void); |
c842a3ad JV |
207 | |
208 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
209 | const union nf_inet_addr *addr, | |
210 | int *idx) | |
211 | { | |
212 | int len; | |
213 | #ifdef CONFIG_IP_VS_IPV6 | |
214 | if (af == AF_INET6) | |
120b9c14 | 215 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
0c6ce78a | 216 | &addr->in6) + 1; |
c842a3ad JV |
217 | else |
218 | #endif | |
3685f25d HH |
219 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
220 | &addr->ip) + 1; | |
c842a3ad JV |
221 | |
222 | *idx += len; | |
223 | BUG_ON(*idx > buf_len + 1); | |
224 | return &buf[*idx - len]; | |
225 | } | |
226 | ||
9aada7ac HE |
227 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
228 | do { \ | |
229 | char ip_vs_dbg_buf[160]; \ | |
230 | int ip_vs_dbg_idx = 0; \ | |
231 | if (level <= ip_vs_get_debug_level()) \ | |
232 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
233 | } while (0) | |
234 | #define IP_VS_ERR_BUF(msg...) \ | |
235 | do { \ | |
236 | char ip_vs_dbg_buf[160]; \ | |
237 | int ip_vs_dbg_idx = 0; \ | |
238 | pr_err(msg); \ | |
239 | } while (0) | |
c842a3ad JV |
240 | |
241 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
242 | #define IP_VS_DBG_ADDR(af, addr) \ |
243 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
244 | sizeof(ip_vs_dbg_buf), addr, \ | |
245 | &ip_vs_dbg_idx) | |
246 | ||
247 | #define IP_VS_DBG(level, msg, ...) \ | |
248 | do { \ | |
249 | if (level <= ip_vs_get_debug_level()) \ | |
250 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
251 | } while (0) | |
252 | #define IP_VS_DBG_RL(msg, ...) \ | |
253 | do { \ | |
254 | if (net_ratelimit()) \ | |
255 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
256 | } while (0) | |
0d79641a | 257 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
258 | do { \ |
259 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 260 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 261 | } while (0) |
0d79641a | 262 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
263 | do { \ |
264 | if (level <= ip_vs_get_debug_level() && \ | |
265 | net_ratelimit()) \ | |
0d79641a | 266 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 267 | } while (0) |
1da177e4 | 268 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
269 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
270 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
271 | #define IP_VS_DBG(level, msg...) do {} while (0) |
272 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
273 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
274 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
275 | #endif |
276 | ||
277 | #define IP_VS_BUG() BUG() | |
1e3e238e | 278 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
279 | do { \ |
280 | if (net_ratelimit()) \ | |
1e3e238e | 281 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 282 | } while (0) |
1da177e4 LT |
283 | |
284 | #ifdef CONFIG_IP_VS_DEBUG | |
285 | #define EnterFunction(level) \ | |
9aada7ac HE |
286 | do { \ |
287 | if (level <= ip_vs_get_debug_level()) \ | |
288 | printk(KERN_DEBUG \ | |
289 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
290 | __func__, __FILE__, __LINE__); \ | |
291 | } while (0) | |
292 | #define LeaveFunction(level) \ | |
293 | do { \ | |
294 | if (level <= ip_vs_get_debug_level()) \ | |
295 | printk(KERN_DEBUG \ | |
296 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
297 | __func__, __FILE__, __LINE__); \ | |
298 | } while (0) | |
1da177e4 LT |
299 | #else |
300 | #define EnterFunction(level) do {} while (0) | |
301 | #define LeaveFunction(level) do {} while (0) | |
302 | #endif | |
303 | ||
07dcc686 | 304 | /* The port number of FTP service (in network order). */ |
f3a7c66b HH |
305 | #define FTPPORT cpu_to_be16(21) |
306 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 307 | |
07dcc686 | 308 | /* TCP State Values */ |
1da177e4 LT |
309 | enum { |
310 | IP_VS_TCP_S_NONE = 0, | |
311 | IP_VS_TCP_S_ESTABLISHED, | |
312 | IP_VS_TCP_S_SYN_SENT, | |
313 | IP_VS_TCP_S_SYN_RECV, | |
314 | IP_VS_TCP_S_FIN_WAIT, | |
315 | IP_VS_TCP_S_TIME_WAIT, | |
316 | IP_VS_TCP_S_CLOSE, | |
317 | IP_VS_TCP_S_CLOSE_WAIT, | |
318 | IP_VS_TCP_S_LAST_ACK, | |
319 | IP_VS_TCP_S_LISTEN, | |
320 | IP_VS_TCP_S_SYNACK, | |
321 | IP_VS_TCP_S_LAST | |
322 | }; | |
323 | ||
07dcc686 | 324 | /* UDP State Values */ |
1da177e4 LT |
325 | enum { |
326 | IP_VS_UDP_S_NORMAL, | |
327 | IP_VS_UDP_S_LAST, | |
328 | }; | |
329 | ||
07dcc686 | 330 | /* ICMP State Values */ |
1da177e4 LT |
331 | enum { |
332 | IP_VS_ICMP_S_NORMAL, | |
333 | IP_VS_ICMP_S_LAST, | |
334 | }; | |
335 | ||
07dcc686 | 336 | /* SCTP State Values */ |
2906f66a VMR |
337 | enum ip_vs_sctp_states { |
338 | IP_VS_SCTP_S_NONE, | |
61e7c420 JA |
339 | IP_VS_SCTP_S_INIT1, |
340 | IP_VS_SCTP_S_INIT, | |
341 | IP_VS_SCTP_S_COOKIE_SENT, | |
342 | IP_VS_SCTP_S_COOKIE_REPLIED, | |
343 | IP_VS_SCTP_S_COOKIE_WAIT, | |
344 | IP_VS_SCTP_S_COOKIE, | |
345 | IP_VS_SCTP_S_COOKIE_ECHOED, | |
2906f66a | 346 | IP_VS_SCTP_S_ESTABLISHED, |
61e7c420 JA |
347 | IP_VS_SCTP_S_SHUTDOWN_SENT, |
348 | IP_VS_SCTP_S_SHUTDOWN_RECEIVED, | |
349 | IP_VS_SCTP_S_SHUTDOWN_ACK_SENT, | |
350 | IP_VS_SCTP_S_REJECTED, | |
2906f66a VMR |
351 | IP_VS_SCTP_S_CLOSED, |
352 | IP_VS_SCTP_S_LAST | |
353 | }; | |
354 | ||
07dcc686 SH |
355 | /* Delta sequence info structure |
356 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
357 | * Only used in the VS/NAT. | |
1da177e4 LT |
358 | */ |
359 | struct ip_vs_seq { | |
360 | __u32 init_seq; /* Add delta from this seq */ | |
361 | __u32 delta; /* Delta in sequence numbers */ | |
362 | __u32 previous_delta; /* Delta in sequence numbers | |
07dcc686 | 363 | * before last resized pkt */ |
1da177e4 LT |
364 | }; |
365 | ||
07dcc686 | 366 | /* counters per cpu */ |
b17fc996 HS |
367 | struct ip_vs_counters { |
368 | __u32 conns; /* connections scheduled */ | |
369 | __u32 inpkts; /* incoming packets */ | |
370 | __u32 outpkts; /* outgoing packets */ | |
371 | __u64 inbytes; /* incoming bytes */ | |
372 | __u64 outbytes; /* outgoing bytes */ | |
373 | }; | |
07dcc686 | 374 | /* Stats per cpu */ |
b17fc996 HS |
375 | struct ip_vs_cpu_stats { |
376 | struct ip_vs_counters ustats; | |
377 | struct u64_stats_sync syncp; | |
378 | }; | |
1da177e4 | 379 | |
07dcc686 | 380 | /* IPVS statistics objects */ |
3a14a313 SW |
381 | struct ip_vs_estimator { |
382 | struct list_head list; | |
383 | ||
384 | u64 last_inbytes; | |
385 | u64 last_outbytes; | |
386 | u32 last_conns; | |
387 | u32 last_inpkts; | |
388 | u32 last_outpkts; | |
389 | ||
390 | u32 cps; | |
391 | u32 inpps; | |
392 | u32 outpps; | |
393 | u32 inbps; | |
394 | u32 outbps; | |
395 | }; | |
396 | ||
fd2c3ef7 | 397 | struct ip_vs_stats { |
b17fc996 | 398 | struct ip_vs_stats_user ustats; /* statistics */ |
e9c0ce23 | 399 | struct ip_vs_estimator est; /* estimator */ |
b962abdc | 400 | struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ |
b17fc996 | 401 | spinlock_t lock; /* spin lock */ |
55a3d4e1 | 402 | struct ip_vs_stats_user ustats0; /* reset values */ |
1da177e4 LT |
403 | }; |
404 | ||
14c85021 ACM |
405 | struct dst_entry; |
406 | struct iphdr; | |
1da177e4 LT |
407 | struct ip_vs_conn; |
408 | struct ip_vs_app; | |
14c85021 | 409 | struct sk_buff; |
252c6410 | 410 | struct ip_vs_proto_data; |
1da177e4 LT |
411 | |
412 | struct ip_vs_protocol { | |
413 | struct ip_vs_protocol *next; | |
414 | char *name; | |
2ad17def JA |
415 | u16 protocol; |
416 | u16 num_states; | |
1da177e4 | 417 | int dont_defrag; |
1da177e4 LT |
418 | |
419 | void (*init)(struct ip_vs_protocol *pp); | |
420 | ||
421 | void (*exit)(struct ip_vs_protocol *pp); | |
422 | ||
582b8e3e | 423 | int (*init_netns)(struct net *net, struct ip_vs_proto_data *pd); |
252c6410 HS |
424 | |
425 | void (*exit_netns)(struct net *net, struct ip_vs_proto_data *pd); | |
426 | ||
51ef348b | 427 | int (*conn_schedule)(int af, struct sk_buff *skb, |
9330419d | 428 | struct ip_vs_proto_data *pd, |
d4383f04 JDB |
429 | int *verdict, struct ip_vs_conn **cpp, |
430 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
431 | |
432 | struct ip_vs_conn * | |
51ef348b JV |
433 | (*conn_in_get)(int af, |
434 | const struct sk_buff *skb, | |
51ef348b | 435 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
436 | int inverse); |
437 | ||
438 | struct ip_vs_conn * | |
51ef348b JV |
439 | (*conn_out_get)(int af, |
440 | const struct sk_buff *skb, | |
51ef348b | 441 | const struct ip_vs_iphdr *iph, |
1da177e4 LT |
442 | int inverse); |
443 | ||
d4383f04 JDB |
444 | int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
445 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 446 | |
d4383f04 JDB |
447 | int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
448 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 449 | |
51ef348b JV |
450 | int (*csum_check)(int af, struct sk_buff *skb, |
451 | struct ip_vs_protocol *pp); | |
1da177e4 LT |
452 | |
453 | const char *(*state_name)(int state); | |
454 | ||
4a516f11 SH |
455 | void (*state_transition)(struct ip_vs_conn *cp, int direction, |
456 | const struct sk_buff *skb, | |
457 | struct ip_vs_proto_data *pd); | |
1da177e4 | 458 | |
ab8a5e84 | 459 | int (*register_app)(struct net *net, struct ip_vs_app *inc); |
1da177e4 | 460 | |
ab8a5e84 | 461 | void (*unregister_app)(struct net *net, struct ip_vs_app *inc); |
1da177e4 LT |
462 | |
463 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
464 | ||
0d79641a | 465 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
466 | const struct sk_buff *skb, |
467 | int offset, | |
468 | const char *msg); | |
469 | ||
9330419d | 470 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
1da177e4 LT |
471 | }; |
472 | ||
07dcc686 | 473 | /* protocol data per netns */ |
252c6410 HS |
474 | struct ip_vs_proto_data { |
475 | struct ip_vs_proto_data *next; | |
476 | struct ip_vs_protocol *pp; | |
477 | int *timeout_table; /* protocol timeout table */ | |
478 | atomic_t appcnt; /* counter of proto app incs. */ | |
479 | struct tcp_states_t *tcp_state_table; | |
480 | }; | |
481 | ||
5c3a0fd7 JP |
482 | struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); |
483 | struct ip_vs_proto_data *ip_vs_proto_data_get(struct net *net, | |
484 | unsigned short proto); | |
1da177e4 | 485 | |
f11017ec | 486 | struct ip_vs_conn_param { |
6e67e586 | 487 | struct net *net; |
f11017ec SH |
488 | const union nf_inet_addr *caddr; |
489 | const union nf_inet_addr *vaddr; | |
490 | __be16 cport; | |
491 | __be16 vport; | |
492 | __u16 protocol; | |
493 | u16 af; | |
85999283 SH |
494 | |
495 | const struct ip_vs_pe *pe; | |
496 | char *pe_data; | |
497 | __u8 pe_data_len; | |
f11017ec SH |
498 | }; |
499 | ||
07dcc686 | 500 | /* IP_VS structure allocated for each dynamically scheduled connection */ |
1da177e4 | 501 | struct ip_vs_conn { |
731109e7 | 502 | struct hlist_node c_list; /* hashed list heads */ |
1da177e4 | 503 | /* Protocol, addresses and port numbers */ |
6e67e586 | 504 | __be16 cport; |
6e67e586 | 505 | __be16 dport; |
1845ed0b JA |
506 | __be16 vport; |
507 | u16 af; /* address family */ | |
6e67e586 HS |
508 | union nf_inet_addr caddr; /* client address */ |
509 | union nf_inet_addr vaddr; /* virtual address */ | |
510 | union nf_inet_addr daddr; /* destination address */ | |
511 | volatile __u32 flags; /* status flags */ | |
1da177e4 | 512 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
ba38528a | 513 | __u16 daf; /* Address family of the dest */ |
1845ed0b JA |
514 | #ifdef CONFIG_NET_NS |
515 | struct net *net; /* Name space */ | |
516 | #endif | |
1da177e4 LT |
517 | |
518 | /* counter and timer */ | |
519 | atomic_t refcnt; /* reference count */ | |
520 | struct timer_list timer; /* Expiration timer */ | |
521 | volatile unsigned long timeout; /* timeout */ | |
522 | ||
523 | /* Flags and state transition */ | |
524 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 525 | volatile __u16 state; /* state info */ |
efac5276 RB |
526 | volatile __u16 old_state; /* old state, to be used for |
527 | * state transition triggerd | |
528 | * synchronization | |
529 | */ | |
1845ed0b | 530 | __u32 fwmark; /* Fire wall mark from skb */ |
749c42b6 | 531 | unsigned long sync_endtime; /* jiffies + sent_retries */ |
1da177e4 LT |
532 | |
533 | /* Control members */ | |
534 | struct ip_vs_conn *control; /* Master control connection */ | |
535 | atomic_t n_control; /* Number of controlled ones */ | |
536 | struct ip_vs_dest *dest; /* real server */ | |
537 | atomic_t in_pkts; /* incoming packet counter */ | |
538 | ||
07dcc686 SH |
539 | /* Packet transmitter for different forwarding methods. If it |
540 | * mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
541 | * otherwise this must be changed to a sk_buff **. | |
542 | * NF_ACCEPT can be returned when destination is local. | |
1da177e4 LT |
543 | */ |
544 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
d4383f04 | 545 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
1da177e4 LT |
546 | |
547 | /* Note: we can group the following members into a structure, | |
07dcc686 SH |
548 | * in order to save more space, and the following members are |
549 | * only used in VS/NAT anyway | |
550 | */ | |
1da177e4 LT |
551 | struct ip_vs_app *app; /* bound ip_vs_app object */ |
552 | void *app_data; /* Application private data */ | |
553 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
554 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
85999283 | 555 | |
e9e5eee8 | 556 | const struct ip_vs_pe *pe; |
85999283 SH |
557 | char *pe_data; |
558 | __u8 pe_data_len; | |
088339a5 JA |
559 | |
560 | struct rcu_head rcu_head; | |
1da177e4 LT |
561 | }; |
562 | ||
07dcc686 | 563 | /* To save some memory in conn table when name space is disabled. */ |
6e67e586 HS |
564 | static inline struct net *ip_vs_conn_net(const struct ip_vs_conn *cp) |
565 | { | |
566 | #ifdef CONFIG_NET_NS | |
567 | return cp->net; | |
568 | #else | |
569 | return &init_net; | |
570 | #endif | |
571 | } | |
07dcc686 | 572 | |
6e67e586 HS |
573 | static inline void ip_vs_conn_net_set(struct ip_vs_conn *cp, struct net *net) |
574 | { | |
575 | #ifdef CONFIG_NET_NS | |
576 | cp->net = net; | |
577 | #endif | |
578 | } | |
579 | ||
580 | static inline int ip_vs_conn_net_eq(const struct ip_vs_conn *cp, | |
581 | struct net *net) | |
582 | { | |
583 | #ifdef CONFIG_NET_NS | |
584 | return cp->net == net; | |
585 | #else | |
586 | return 1; | |
587 | #endif | |
588 | } | |
1da177e4 | 589 | |
07dcc686 SH |
590 | /* Extended internal versions of struct ip_vs_service_user and ip_vs_dest_user |
591 | * for IPv6 support. | |
c860c6b1 | 592 | * |
07dcc686 SH |
593 | * We need these to conveniently pass around service and destination |
594 | * options, but unfortunately, we also need to keep the old definitions to | |
595 | * maintain userspace backwards compatibility for the setsockopt interface. | |
c860c6b1 JV |
596 | */ |
597 | struct ip_vs_service_user_kern { | |
598 | /* virtual service addresses */ | |
599 | u16 af; | |
600 | u16 protocol; | |
601 | union nf_inet_addr addr; /* virtual ip address */ | |
0a925864 | 602 | __be16 port; |
c860c6b1 JV |
603 | u32 fwmark; /* firwall mark of service */ |
604 | ||
605 | /* virtual service options */ | |
606 | char *sched_name; | |
0d1e71b0 | 607 | char *pe_name; |
95c96174 ED |
608 | unsigned int flags; /* virtual service flags */ |
609 | unsigned int timeout; /* persistent timeout in sec */ | |
0a925864 | 610 | __be32 netmask; /* persistent netmask or plen */ |
c860c6b1 JV |
611 | }; |
612 | ||
613 | ||
614 | struct ip_vs_dest_user_kern { | |
615 | /* destination server address */ | |
616 | union nf_inet_addr addr; | |
0a925864 | 617 | __be16 port; |
c860c6b1 JV |
618 | |
619 | /* real server options */ | |
95c96174 | 620 | unsigned int conn_flags; /* connection flags */ |
c860c6b1 JV |
621 | int weight; /* destination weight */ |
622 | ||
623 | /* thresholds for active connections */ | |
624 | u32 u_threshold; /* upper threshold */ | |
625 | u32 l_threshold; /* lower threshold */ | |
6cff339b AG |
626 | |
627 | /* Address family of addr */ | |
628 | u16 af; | |
c860c6b1 JV |
629 | }; |
630 | ||
631 | ||
1da177e4 | 632 | /* |
07dcc686 SH |
633 | * The information about the virtual service offered to the net and the |
634 | * forwarding entries. | |
1da177e4 LT |
635 | */ |
636 | struct ip_vs_service { | |
ceec4c38 JA |
637 | struct hlist_node s_list; /* for normal service table */ |
638 | struct hlist_node f_list; /* for fwmark-based service table */ | |
1da177e4 | 639 | atomic_t refcnt; /* reference counter */ |
1da177e4 | 640 | |
e7ade46a | 641 | u16 af; /* address family */ |
1da177e4 | 642 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 643 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 644 | __be16 port; /* port number for the service */ |
1da177e4 | 645 | __u32 fwmark; /* firewall mark of the service */ |
95c96174 ED |
646 | unsigned int flags; /* service status flags */ |
647 | unsigned int timeout; /* persistent timeout in ticks */ | |
0a925864 | 648 | __be32 netmask; /* grouping granularity, mask/plen */ |
fc723250 | 649 | struct net *net; |
1da177e4 LT |
650 | |
651 | struct list_head destinations; /* real server d-linked list */ | |
652 | __u32 num_dests; /* number of servers */ | |
653 | struct ip_vs_stats stats; /* statistics for the service */ | |
1da177e4 LT |
654 | |
655 | /* for scheduling */ | |
ceec4c38 | 656 | struct ip_vs_scheduler __rcu *scheduler; /* bound scheduler object */ |
ba3a3ce1 | 657 | spinlock_t sched_lock; /* lock sched_data */ |
1da177e4 | 658 | void *sched_data; /* scheduler application data */ |
85999283 SH |
659 | |
660 | /* alternate persistence engine */ | |
ceec4c38 JA |
661 | struct ip_vs_pe __rcu *pe; |
662 | ||
663 | struct rcu_head rcu_head; | |
1da177e4 LT |
664 | }; |
665 | ||
026ace06 JA |
666 | /* Information for cached dst */ |
667 | struct ip_vs_dest_dst { | |
668 | struct dst_entry *dst_cache; /* destination cache entry */ | |
669 | u32 dst_cookie; | |
670 | union nf_inet_addr dst_saddr; | |
671 | struct rcu_head rcu_head; | |
672 | }; | |
1da177e4 | 673 | |
07dcc686 SH |
674 | /* The real server destination forwarding entry with ip address, port number, |
675 | * and so on. | |
1da177e4 LT |
676 | */ |
677 | struct ip_vs_dest { | |
678 | struct list_head n_list; /* for the dests in the service */ | |
276472ea | 679 | struct hlist_node d_list; /* for table with all the dests */ |
1da177e4 | 680 | |
e7ade46a | 681 | u16 af; /* address family */ |
014d730d | 682 | __be16 port; /* port number of the server */ |
f2431e6e | 683 | union nf_inet_addr addr; /* IP address of the server */ |
95c96174 | 684 | volatile unsigned int flags; /* dest status flags */ |
1da177e4 LT |
685 | atomic_t conn_flags; /* flags to copy to conn */ |
686 | atomic_t weight; /* server weight */ | |
687 | ||
688 | atomic_t refcnt; /* reference counter */ | |
689 | struct ip_vs_stats stats; /* statistics */ | |
bcbde4c0 | 690 | unsigned long idle_start; /* start time, jiffies */ |
1da177e4 LT |
691 | |
692 | /* connection counters and thresholds */ | |
693 | atomic_t activeconns; /* active connections */ | |
694 | atomic_t inactconns; /* inactive connections */ | |
695 | atomic_t persistconns; /* persistent connections */ | |
696 | __u32 u_threshold; /* upper threshold */ | |
697 | __u32 l_threshold; /* lower threshold */ | |
698 | ||
699 | /* for destination cache */ | |
700 | spinlock_t dst_lock; /* lock of dst_cache */ | |
026ace06 | 701 | struct ip_vs_dest_dst __rcu *dest_dst; /* cached dst info */ |
1da177e4 LT |
702 | |
703 | /* for virtual service */ | |
bcbde4c0 | 704 | struct ip_vs_service __rcu *svc; /* service it belongs to */ |
1da177e4 | 705 | __u16 protocol; /* which protocol (TCP/UDP) */ |
014d730d | 706 | __be16 vport; /* virtual port number */ |
f2431e6e | 707 | union nf_inet_addr vaddr; /* virtual IP address */ |
1da177e4 | 708 | __u32 vfwmark; /* firewall mark of service */ |
276472ea | 709 | |
578bc3ef | 710 | struct list_head t_list; /* in dest_trash */ |
276472ea | 711 | unsigned int in_rs_table:1; /* we are in rs_table */ |
1da177e4 LT |
712 | }; |
713 | ||
07dcc686 | 714 | /* The scheduler object */ |
1da177e4 LT |
715 | struct ip_vs_scheduler { |
716 | struct list_head n_list; /* d-linked list head */ | |
717 | char *name; /* scheduler name */ | |
718 | atomic_t refcnt; /* reference counter */ | |
719 | struct module *module; /* THIS_MODULE/NULL */ | |
720 | ||
721 | /* scheduler initializing service */ | |
722 | int (*init_service)(struct ip_vs_service *svc); | |
723 | /* scheduling service finish */ | |
ed3ffc4e | 724 | void (*done_service)(struct ip_vs_service *svc); |
6b6df466 JA |
725 | /* dest is linked */ |
726 | int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
727 | /* dest is unlinked */ | |
728 | int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
729 | /* dest is updated */ | |
730 | int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
1da177e4 LT |
731 | |
732 | /* selecting a server from the given service */ | |
733 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
bba54de5 JA |
734 | const struct sk_buff *skb, |
735 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
736 | }; |
737 | ||
85999283 SH |
738 | /* The persistence engine object */ |
739 | struct ip_vs_pe { | |
740 | struct list_head n_list; /* d-linked list head */ | |
741 | char *name; /* scheduler name */ | |
742 | atomic_t refcnt; /* reference counter */ | |
743 | struct module *module; /* THIS_MODULE/NULL */ | |
744 | ||
745 | /* get the connection template, if any */ | |
746 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
747 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
748 | struct ip_vs_conn *ct); | |
749 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
750 | bool inverse); | |
a3c918ac | 751 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
85999283 | 752 | }; |
1da177e4 | 753 | |
07dcc686 | 754 | /* The application module object (a.k.a. app incarnation) */ |
fd2c3ef7 | 755 | struct ip_vs_app { |
1da177e4 LT |
756 | struct list_head a_list; /* member in app list */ |
757 | int type; /* IP_VS_APP_TYPE_xxx */ | |
758 | char *name; /* application module name */ | |
759 | __u16 protocol; | |
760 | struct module *module; /* THIS_MODULE/NULL */ | |
761 | struct list_head incs_list; /* list of incarnations */ | |
762 | ||
763 | /* members for application incarnations */ | |
764 | struct list_head p_list; /* member in proto app list */ | |
765 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 766 | __be16 port; /* port number in net order */ |
1da177e4 | 767 | atomic_t usecnt; /* usage counter */ |
363c97d7 | 768 | struct rcu_head rcu_head; |
1da177e4 | 769 | |
07dcc686 | 770 | /* output hook: Process packet in inout direction, diff set for TCP. |
8b27b10f JA |
771 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
772 | * 2=Mangled but checksum was not updated | |
773 | */ | |
1da177e4 | 774 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 775 | struct sk_buff *, int *diff); |
1da177e4 | 776 | |
07dcc686 | 777 | /* input hook: Process packet in outin direction, diff set for TCP. |
8b27b10f JA |
778 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
779 | * 2=Mangled but checksum was not updated | |
780 | */ | |
1da177e4 | 781 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 782 | struct sk_buff *, int *diff); |
1da177e4 LT |
783 | |
784 | /* ip_vs_app initializer */ | |
785 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
786 | ||
787 | /* ip_vs_app finish */ | |
788 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
789 | ||
790 | ||
791 | /* not used now */ | |
792 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
793 | struct ip_vs_protocol *); | |
794 | ||
795 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
796 | ||
797 | int * timeout_table; | |
798 | int * timeouts; | |
799 | int timeouts_size; | |
800 | ||
801 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
802 | int *verdict, struct ip_vs_conn **cpp); | |
803 | ||
804 | struct ip_vs_conn * | |
805 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 806 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
807 | |
808 | struct ip_vs_conn * | |
809 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 810 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
811 | |
812 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
813 | const struct sk_buff *skb, | |
814 | struct ip_vs_app *app); | |
815 | ||
816 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
817 | }; | |
818 | ||
f73181c8 PNA |
819 | struct ipvs_master_sync_state { |
820 | struct list_head sync_queue; | |
821 | struct ip_vs_sync_buff *sync_buff; | |
07995674 | 822 | unsigned long sync_queue_len; |
f73181c8 PNA |
823 | unsigned int sync_queue_delay; |
824 | struct task_struct *master_thread; | |
825 | struct delayed_work master_wakeup_work; | |
826 | struct netns_ipvs *ipvs; | |
827 | }; | |
828 | ||
578bc3ef JA |
829 | /* How much time to keep dests in trash */ |
830 | #define IP_VS_DEST_TRASH_PERIOD (120 * HZ) | |
831 | ||
2553d064 JA |
832 | /* IPVS in network namespace */ |
833 | struct netns_ipvs { | |
834 | int gen; /* Generation */ | |
7a4f0761 | 835 | int enable; /* enable like nf_hooks do */ |
07dcc686 | 836 | /* Hash table: for real service lookups */ |
2553d064 JA |
837 | #define IP_VS_RTAB_BITS 4 |
838 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
839 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
840 | ||
276472ea | 841 | struct hlist_head rs_table[IP_VS_RTAB_SIZE]; |
2553d064 JA |
842 | /* ip_vs_app */ |
843 | struct list_head app_list; | |
2553d064 JA |
844 | /* ip_vs_proto */ |
845 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
846 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
847 | /* ip_vs_proto_tcp */ | |
848 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
849 | #define TCP_APP_TAB_BITS 4 | |
850 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
851 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
852 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
2553d064 JA |
853 | #endif |
854 | /* ip_vs_proto_udp */ | |
855 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
856 | #define UDP_APP_TAB_BITS 4 | |
857 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
858 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
859 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
2553d064 JA |
860 | #endif |
861 | /* ip_vs_proto_sctp */ | |
862 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
863 | #define SCTP_APP_TAB_BITS 4 | |
864 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
865 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
866 | /* Hash table for SCTP application incarnations */ | |
867 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
2553d064 JA |
868 | #endif |
869 | /* ip_vs_conn */ | |
07dcc686 | 870 | atomic_t conn_count; /* connection counter */ |
2553d064 JA |
871 | |
872 | /* ip_vs_ctl */ | |
2a0751af | 873 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
2553d064 JA |
874 | |
875 | int num_services; /* no of virtual services */ | |
f2247fbd | 876 | |
f2247fbd SH |
877 | /* Trash for destinations */ |
878 | struct list_head dest_trash; | |
578bc3ef JA |
879 | spinlock_t dest_trash_lock; |
880 | struct timer_list dest_trash_timer; /* expiration timer */ | |
f2247fbd SH |
881 | /* Service counters */ |
882 | atomic_t ftpsvc_counter; | |
883 | atomic_t nullsvc_counter; | |
884 | ||
885 | #ifdef CONFIG_SYSCTL | |
2553d064 JA |
886 | /* 1/rate drop and drop-entry variables */ |
887 | struct delayed_work defense_work; /* Work handler */ | |
888 | int drop_rate; | |
889 | int drop_counter; | |
890 | atomic_t dropentry; | |
891 | /* locks in ctl.c */ | |
892 | spinlock_t dropentry_lock; /* drop entry handling */ | |
893 | spinlock_t droppacket_lock; /* drop packet handling */ | |
894 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
895 | |
896 | /* sys-ctl struct */ | |
897 | struct ctl_table_header *sysctl_hdr; | |
898 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
899 | #endif |
900 | ||
2553d064 JA |
901 | /* sysctl variables */ |
902 | int sysctl_amemthresh; | |
903 | int sysctl_am_droprate; | |
904 | int sysctl_drop_entry; | |
905 | int sysctl_drop_packet; | |
906 | int sysctl_secure_tcp; | |
907 | #ifdef CONFIG_IP_VS_NFCT | |
908 | int sysctl_conntrack; | |
909 | #endif | |
910 | int sysctl_snat_reroute; | |
911 | int sysctl_sync_ver; | |
f73181c8 | 912 | int sysctl_sync_ports; |
4d0c875d | 913 | int sysctl_sync_persist_mode; |
07995674 | 914 | unsigned long sysctl_sync_qlen_max; |
1c003b15 | 915 | int sysctl_sync_sock_size; |
2553d064 JA |
916 | int sysctl_cache_bypass; |
917 | int sysctl_expire_nodest_conn; | |
c6c96c18 AF |
918 | int sysctl_sloppy_tcp; |
919 | int sysctl_sloppy_sctp; | |
2553d064 JA |
920 | int sysctl_expire_quiescent_template; |
921 | int sysctl_sync_threshold[2]; | |
749c42b6 JA |
922 | unsigned int sysctl_sync_refresh_period; |
923 | int sysctl_sync_retries; | |
2553d064 | 924 | int sysctl_nat_icmp_send; |
3654e611 | 925 | int sysctl_pmtu_disc; |
0c12582f | 926 | int sysctl_backup_only; |
2553d064 JA |
927 | |
928 | /* ip_vs_lblc */ | |
929 | int sysctl_lblc_expiration; | |
930 | struct ctl_table_header *lblc_ctl_header; | |
931 | struct ctl_table *lblc_ctl_table; | |
932 | /* ip_vs_lblcr */ | |
933 | int sysctl_lblcr_expiration; | |
934 | struct ctl_table_header *lblcr_ctl_header; | |
935 | struct ctl_table *lblcr_ctl_table; | |
936 | /* ip_vs_est */ | |
937 | struct list_head est_list; /* estimator list */ | |
938 | spinlock_t est_lock; | |
939 | struct timer_list est_timer; /* Estimation timer */ | |
940 | /* ip_vs_sync */ | |
2553d064 | 941 | spinlock_t sync_lock; |
f73181c8 | 942 | struct ipvs_master_sync_state *ms; |
2553d064 | 943 | spinlock_t sync_buff_lock; |
f73181c8 PNA |
944 | struct task_struct **backup_threads; |
945 | int threads_mask; | |
2553d064 JA |
946 | int send_mesg_maxlen; |
947 | int recv_mesg_maxlen; | |
948 | volatile int sync_state; | |
949 | volatile int master_syncid; | |
950 | volatile int backup_syncid; | |
ae1d48b2 | 951 | struct mutex sync_mutex; |
2553d064 JA |
952 | /* multicast interface name */ |
953 | char master_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
954 | char backup_mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
955 | /* net name space ptr */ | |
956 | struct net *net; /* Needed by timer routines */ | |
07dcc686 SH |
957 | /* Number of heterogeneous destinations, needed becaus heterogeneous |
958 | * are not supported when synchronization is enabled. | |
959 | */ | |
391f503d | 960 | unsigned int mixed_address_family_dests; |
2553d064 | 961 | }; |
1da177e4 | 962 | |
59e0350e SH |
963 | #define DEFAULT_SYNC_THRESHOLD 3 |
964 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 965 | #define DEFAULT_SYNC_VER 1 |
c6c96c18 AF |
966 | #define DEFAULT_SLOPPY_TCP 0 |
967 | #define DEFAULT_SLOPPY_SCTP 0 | |
749c42b6 JA |
968 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
969 | #define DEFAULT_SYNC_RETRIES 0 | |
1c003b15 PNA |
970 | #define IPVS_SYNC_WAKEUP_RATE 8 |
971 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
972 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
973 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
749c42b6 | 974 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
f73181c8 | 975 | #define IPVS_SYNC_PORTS_MAX (1 << 6) |
59e0350e SH |
976 | |
977 | #ifdef CONFIG_SYSCTL | |
978 | ||
979 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
980 | { | |
981 | return ipvs->sysctl_sync_threshold[0]; | |
982 | } | |
983 | ||
984 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
985 | { | |
749c42b6 JA |
986 | return ACCESS_ONCE(ipvs->sysctl_sync_threshold[1]); |
987 | } | |
988 | ||
989 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
990 | { | |
991 | return ACCESS_ONCE(ipvs->sysctl_sync_refresh_period); | |
992 | } | |
993 | ||
994 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
995 | { | |
996 | return ipvs->sysctl_sync_retries; | |
59e0350e SH |
997 | } |
998 | ||
7532e8d4 SH |
999 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1000 | { | |
1001 | return ipvs->sysctl_sync_ver; | |
1002 | } | |
1003 | ||
c6c96c18 AF |
1004 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1005 | { | |
1006 | return ipvs->sysctl_sloppy_tcp; | |
1007 | } | |
1008 | ||
1009 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1010 | { | |
1011 | return ipvs->sysctl_sloppy_sctp; | |
1012 | } | |
1013 | ||
f73181c8 PNA |
1014 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1015 | { | |
1016 | return ACCESS_ONCE(ipvs->sysctl_sync_ports); | |
1017 | } | |
1018 | ||
4d0c875d JA |
1019 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1020 | { | |
1021 | return ipvs->sysctl_sync_persist_mode; | |
1022 | } | |
1023 | ||
07995674 | 1024 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1025 | { |
1026 | return ipvs->sysctl_sync_qlen_max; | |
1027 | } | |
1028 | ||
1029 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1030 | { | |
1031 | return ipvs->sysctl_sync_sock_size; | |
1032 | } | |
1033 | ||
3654e611 JA |
1034 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1035 | { | |
1036 | return ipvs->sysctl_pmtu_disc; | |
1037 | } | |
1038 | ||
0c12582f JA |
1039 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1040 | { | |
1041 | return ipvs->sync_state & IP_VS_STATE_BACKUP && | |
1042 | ipvs->sysctl_backup_only; | |
1043 | } | |
1044 | ||
59e0350e SH |
1045 | #else |
1046 | ||
1047 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1048 | { | |
1049 | return DEFAULT_SYNC_THRESHOLD; | |
1050 | } | |
1051 | ||
1052 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1053 | { | |
1054 | return DEFAULT_SYNC_PERIOD; | |
1055 | } | |
1056 | ||
749c42b6 JA |
1057 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
1058 | { | |
1059 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1060 | } | |
1061 | ||
1062 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1063 | { | |
1064 | return DEFAULT_SYNC_RETRIES & 3; | |
1065 | } | |
1066 | ||
7532e8d4 SH |
1067 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1068 | { | |
1069 | return DEFAULT_SYNC_VER; | |
1070 | } | |
1071 | ||
c6c96c18 AF |
1072 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1073 | { | |
1074 | return DEFAULT_SLOPPY_TCP; | |
1075 | } | |
1076 | ||
1077 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1078 | { | |
1079 | return DEFAULT_SLOPPY_SCTP; | |
1080 | } | |
1081 | ||
f73181c8 PNA |
1082 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1083 | { | |
1084 | return 1; | |
1085 | } | |
1086 | ||
4d0c875d JA |
1087 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1088 | { | |
1089 | return 0; | |
1090 | } | |
1091 | ||
07995674 | 1092 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1093 | { |
1094 | return IPVS_SYNC_QLEN_MAX; | |
1095 | } | |
1096 | ||
1097 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1098 | { | |
1099 | return 0; | |
1100 | } | |
1101 | ||
3654e611 JA |
1102 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1103 | { | |
1104 | return 1; | |
1105 | } | |
1106 | ||
0c12582f JA |
1107 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1108 | { | |
1109 | return 0; | |
1110 | } | |
1111 | ||
59e0350e SH |
1112 | #endif |
1113 | ||
07dcc686 SH |
1114 | /* IPVS core functions |
1115 | * (from ip_vs_core.c) | |
1da177e4 | 1116 | */ |
5c3a0fd7 JP |
1117 | const char *ip_vs_proto_name(unsigned int proto); |
1118 | void ip_vs_init_hash_table(struct list_head *table, int rows); | |
afdd6140 | 1119 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 1120 | |
1da177e4 LT |
1121 | #define IP_VS_APP_TYPE_FTP 1 |
1122 | ||
07dcc686 SH |
1123 | /* ip_vs_conn handling functions |
1124 | * (from ip_vs_conn.c) | |
1da177e4 | 1125 | */ |
1da177e4 LT |
1126 | enum { |
1127 | IP_VS_DIR_INPUT = 0, | |
1128 | IP_VS_DIR_OUTPUT, | |
1129 | IP_VS_DIR_INPUT_ONLY, | |
1130 | IP_VS_DIR_LAST, | |
1131 | }; | |
1132 | ||
6e67e586 | 1133 | static inline void ip_vs_conn_fill_param(struct net *net, int af, int protocol, |
f11017ec SH |
1134 | const union nf_inet_addr *caddr, |
1135 | __be16 cport, | |
1136 | const union nf_inet_addr *vaddr, | |
1137 | __be16 vport, | |
1138 | struct ip_vs_conn_param *p) | |
1139 | { | |
6e67e586 | 1140 | p->net = net; |
f11017ec SH |
1141 | p->af = af; |
1142 | p->protocol = protocol; | |
1143 | p->caddr = caddr; | |
1144 | p->cport = cport; | |
1145 | p->vaddr = vaddr; | |
1146 | p->vport = vport; | |
85999283 SH |
1147 | p->pe = NULL; |
1148 | p->pe_data = NULL; | |
f11017ec | 1149 | } |
28364a59 | 1150 | |
f11017ec SH |
1151 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
1152 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 1153 | |
5c0d2374 | 1154 | struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb, |
5c0d2374 | 1155 | const struct ip_vs_iphdr *iph, |
5c0d2374 SH |
1156 | int inverse); |
1157 | ||
f11017ec | 1158 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 1159 | |
5c0d2374 | 1160 | struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb, |
5c0d2374 | 1161 | const struct ip_vs_iphdr *iph, |
5c0d2374 SH |
1162 | int inverse); |
1163 | ||
088339a5 JA |
1164 | /* Get reference to gain full access to conn. |
1165 | * By default, RCU read-side critical sections have access only to | |
1166 | * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference. | |
1167 | */ | |
1168 | static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp) | |
1169 | { | |
1170 | return atomic_inc_not_zero(&cp->refcnt); | |
1171 | } | |
1172 | ||
1da177e4 LT |
1173 | /* put back the conn without restarting its timer */ |
1174 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1175 | { | |
4e857c58 | 1176 | smp_mb__before_atomic(); |
1da177e4 LT |
1177 | atomic_dec(&cp->refcnt); |
1178 | } | |
5c3a0fd7 JP |
1179 | void ip_vs_conn_put(struct ip_vs_conn *cp); |
1180 | void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); | |
1da177e4 | 1181 | |
ba38528a | 1182 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af, |
f11017ec | 1183 | const union nf_inet_addr *daddr, |
95c96174 | 1184 | __be16 dport, unsigned int flags, |
0e051e68 | 1185 | struct ip_vs_dest *dest, __u32 fwmark); |
5c3a0fd7 | 1186 | void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1da177e4 | 1187 | |
5c3a0fd7 | 1188 | const char *ip_vs_state_name(__u16 proto, int state); |
1da177e4 | 1189 | |
5c3a0fd7 JP |
1190 | void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp); |
1191 | int ip_vs_check_template(struct ip_vs_conn *ct); | |
1192 | void ip_vs_random_dropentry(struct net *net); | |
1193 | int ip_vs_conn_init(void); | |
1194 | void ip_vs_conn_cleanup(void); | |
1da177e4 LT |
1195 | |
1196 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1197 | { | |
1198 | struct ip_vs_conn *ctl_cp = cp->control; | |
1199 | if (!ctl_cp) { | |
cfc78c5a JV |
1200 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
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 | return; |
1208 | } | |
1209 | ||
cfc78c5a JV |
1210 | IP_VS_DBG_BUF(7, "DELeting 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 = NULL; | |
1218 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1219 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1220 | "%s:%d to %s:%d\n", | |
1221 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1222 | ntohs(cp->cport), | |
1223 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1224 | ntohs(cp->vport)); | |
1225 | ||
1da177e4 LT |
1226 | return; |
1227 | } | |
1228 | atomic_dec(&ctl_cp->n_control); | |
1229 | } | |
1230 | ||
1231 | static inline void | |
1232 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1233 | { | |
1234 | if (cp->control) { | |
cfc78c5a JV |
1235 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
1236 | "%s:%d to %s:%d\n", | |
1237 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1238 | ntohs(cp->cport), | |
1239 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1240 | ntohs(cp->vport)); | |
1241 | ||
1da177e4 LT |
1242 | ip_vs_control_del(cp); |
1243 | } | |
1244 | ||
cfc78c5a JV |
1245 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1246 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1247 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1248 | ntohs(cp->cport), | |
1249 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1250 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1251 | |
1252 | cp->control = ctl_cp; | |
1253 | atomic_inc(&ctl_cp->n_control); | |
1254 | } | |
1255 | ||
07dcc686 | 1256 | /* IPVS netns init & cleanup functions */ |
5c3a0fd7 JP |
1257 | int ip_vs_estimator_net_init(struct net *net); |
1258 | int ip_vs_control_net_init(struct net *net); | |
1259 | int ip_vs_protocol_net_init(struct net *net); | |
1260 | int ip_vs_app_net_init(struct net *net); | |
1261 | int ip_vs_conn_net_init(struct net *net); | |
1262 | int ip_vs_sync_net_init(struct net *net); | |
1263 | void ip_vs_conn_net_cleanup(struct net *net); | |
1264 | void ip_vs_app_net_cleanup(struct net *net); | |
1265 | void ip_vs_protocol_net_cleanup(struct net *net); | |
1266 | void ip_vs_control_net_cleanup(struct net *net); | |
1267 | void ip_vs_estimator_net_cleanup(struct net *net); | |
1268 | void ip_vs_sync_net_cleanup(struct net *net); | |
1269 | void ip_vs_service_net_cleanup(struct net *net); | |
1da177e4 | 1270 | |
07dcc686 SH |
1271 | /* IPVS application functions |
1272 | * (from ip_vs_app.c) | |
1da177e4 LT |
1273 | */ |
1274 | #define IP_VS_APP_MAX_PORTS 8 | |
5c3a0fd7 JP |
1275 | struct ip_vs_app *register_ip_vs_app(struct net *net, struct ip_vs_app *app); |
1276 | void unregister_ip_vs_app(struct net *net, struct ip_vs_app *app); | |
1277 | int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); | |
1278 | void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
1279 | int register_ip_vs_app_inc(struct net *net, struct ip_vs_app *app, __u16 proto, | |
1280 | __u16 port); | |
1281 | int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
1282 | void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1283 | ||
1284 | int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); | |
1285 | int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
1da177e4 | 1286 | |
8be67a66 SH |
1287 | int register_ip_vs_pe(struct ip_vs_pe *pe); |
1288 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1289 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1290 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 | 1291 | |
07dcc686 | 1292 | /* Use a #define to avoid all of module.h just for these trivial ops */ |
69e7dae4 PG |
1293 | #define ip_vs_pe_get(pe) \ |
1294 | if (pe && pe->module) \ | |
e9e5eee8 | 1295 | __module_get(pe->module); |
e9e5eee8 | 1296 | |
69e7dae4 PG |
1297 | #define ip_vs_pe_put(pe) \ |
1298 | if (pe && pe->module) \ | |
e9e5eee8 | 1299 | module_put(pe->module); |
1da177e4 | 1300 | |
07dcc686 | 1301 | /* IPVS protocol functions (from ip_vs_proto.c) */ |
5c3a0fd7 JP |
1302 | int ip_vs_protocol_init(void); |
1303 | void ip_vs_protocol_cleanup(void); | |
1304 | void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); | |
1305 | int *ip_vs_create_timeout_table(int *table, int size); | |
1306 | int ip_vs_set_state_timeout(int *table, int num, const char *const *names, | |
1307 | const char *name, int to); | |
1308 | void ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, | |
1309 | const struct sk_buff *skb, int offset, | |
1310 | const char *msg); | |
1da177e4 LT |
1311 | |
1312 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1313 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1314 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1315 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1316 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1317 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 | 1318 | |
07dcc686 SH |
1319 | /* Registering/unregistering scheduler functions |
1320 | * (from ip_vs_sched.c) | |
1da177e4 | 1321 | */ |
5c3a0fd7 JP |
1322 | int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
1323 | int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1324 | int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1325 | struct ip_vs_scheduler *scheduler); | |
1326 | void ip_vs_unbind_scheduler(struct ip_vs_service *svc, | |
1327 | struct ip_vs_scheduler *sched); | |
1328 | struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1329 | void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1330 | struct ip_vs_conn * | |
190ecd27 | 1331 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
d4383f04 JDB |
1332 | struct ip_vs_proto_data *pd, int *ignored, |
1333 | struct ip_vs_iphdr *iph); | |
5c3a0fd7 JP |
1334 | int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
1335 | struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); | |
1da177e4 | 1336 | |
5c3a0fd7 | 1337 | void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
41ac51ee | 1338 | |
07dcc686 | 1339 | /* IPVS control data and functions (from ip_vs_ctl.c) */ |
1da177e4 | 1340 | extern struct ip_vs_stats ip_vs_stats; |
b880c1f0 | 1341 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 | 1342 | |
5c3a0fd7 | 1343 | struct ip_vs_service * |
ceec4c38 | 1344 | ip_vs_service_find(struct net *net, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1345 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 | 1346 | |
5c3a0fd7 JP |
1347 | bool ip_vs_has_real_service(struct net *net, int af, __u16 protocol, |
1348 | const union nf_inet_addr *daddr, __be16 dport); | |
1349 | ||
1350 | int ip_vs_use_count_inc(void); | |
1351 | void ip_vs_use_count_dec(void); | |
1352 | int ip_vs_register_nl_ioctl(void); | |
1353 | void ip_vs_unregister_nl_ioctl(void); | |
1354 | int ip_vs_control_init(void); | |
1355 | void ip_vs_control_cleanup(void); | |
1356 | struct ip_vs_dest * | |
655eef10 AG |
1357 | ip_vs_find_dest(struct net *net, int svc_af, int dest_af, |
1358 | const union nf_inet_addr *daddr, __be16 dport, | |
1359 | const union nf_inet_addr *vaddr, __be16 vport, | |
52793dbe | 1360 | __u16 protocol, __u32 fwmark, __u32 flags); |
5c3a0fd7 | 1361 | void ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 | 1362 | |
fca9c20a JA |
1363 | static inline void ip_vs_dest_hold(struct ip_vs_dest *dest) |
1364 | { | |
1365 | atomic_inc(&dest->refcnt); | |
1366 | } | |
1367 | ||
1368 | static inline void ip_vs_dest_put(struct ip_vs_dest *dest) | |
1369 | { | |
4e857c58 | 1370 | smp_mb__before_atomic(); |
fca9c20a JA |
1371 | atomic_dec(&dest->refcnt); |
1372 | } | |
1da177e4 | 1373 | |
9e4e948a JA |
1374 | static inline void ip_vs_dest_put_and_free(struct ip_vs_dest *dest) |
1375 | { | |
1376 | if (atomic_dec_return(&dest->refcnt) < 0) | |
1377 | kfree(dest); | |
1378 | } | |
1379 | ||
07dcc686 SH |
1380 | /* IPVS sync daemon data and function prototypes |
1381 | * (from ip_vs_sync.c) | |
1da177e4 | 1382 | */ |
5c3a0fd7 JP |
1383 | int start_sync_thread(struct net *net, int state, char *mcast_ifn, __u8 syncid); |
1384 | int stop_sync_thread(struct net *net, int state); | |
1385 | void ip_vs_sync_conn(struct net *net, struct ip_vs_conn *cp, int pkts); | |
1da177e4 | 1386 | |
07dcc686 | 1387 | /* IPVS rate estimator prototypes (from ip_vs_est.c) */ |
5c3a0fd7 JP |
1388 | void ip_vs_start_estimator(struct net *net, struct ip_vs_stats *stats); |
1389 | void ip_vs_stop_estimator(struct net *net, struct ip_vs_stats *stats); | |
1390 | void ip_vs_zero_estimator(struct ip_vs_stats *stats); | |
1391 | void ip_vs_read_estimator(struct ip_vs_stats_user *dst, | |
1392 | struct ip_vs_stats *stats); | |
1da177e4 | 1393 | |
07dcc686 | 1394 | /* Various IPVS packet transmitters (from ip_vs_xmit.c) */ |
5c3a0fd7 JP |
1395 | int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
1396 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1397 | int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1398 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1399 | int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1400 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1401 | int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1402 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1403 | int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1404 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1405 | int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1406 | struct ip_vs_protocol *pp, int offset, | |
1407 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
1408 | void ip_vs_dest_dst_rcu_free(struct rcu_head *head); | |
1da177e4 | 1409 | |
b3cdd2a7 | 1410 | #ifdef CONFIG_IP_VS_IPV6 |
5c3a0fd7 JP |
1411 | int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
1412 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1413 | int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1414 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1415 | int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1416 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1417 | int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1418 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1419 | int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1420 | struct ip_vs_protocol *pp, int offset, | |
1421 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
b3cdd2a7 | 1422 | #endif |
1da177e4 | 1423 | |
3a1bbf18 | 1424 | #ifdef CONFIG_SYSCTL |
07dcc686 SH |
1425 | /* This is a simple mechanism to ignore packets when |
1426 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1427 | * we start to drop 1/rate of the packets | |
1da177e4 | 1428 | */ |
a0840e2e | 1429 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1430 | { |
a0840e2e HS |
1431 | if (!ipvs->drop_rate) |
1432 | return 0; | |
1433 | if (--ipvs->drop_counter > 0) | |
1434 | return 0; | |
1435 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1436 | return 1; |
1437 | } | |
3a1bbf18 SH |
1438 | #else |
1439 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1440 | #endif | |
1da177e4 | 1441 | |
07dcc686 | 1442 | /* ip_vs_fwd_tag returns the forwarding tag of the connection */ |
1da177e4 LT |
1443 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) |
1444 | ||
732db659 | 1445 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1446 | { |
1447 | char fwd; | |
1448 | ||
1449 | switch (IP_VS_FWD_METHOD(cp)) { | |
1450 | case IP_VS_CONN_F_MASQ: | |
1451 | fwd = 'M'; break; | |
1452 | case IP_VS_CONN_F_LOCALNODE: | |
1453 | fwd = 'L'; break; | |
1454 | case IP_VS_CONN_F_TUNNEL: | |
1455 | fwd = 'T'; break; | |
1456 | case IP_VS_CONN_F_DROUTE: | |
1457 | fwd = 'R'; break; | |
1458 | case IP_VS_CONN_F_BYPASS: | |
1459 | fwd = 'B'; break; | |
1460 | default: | |
1461 | fwd = '?'; break; | |
1462 | } | |
1463 | return fwd; | |
1464 | } | |
1465 | ||
5c3a0fd7 JP |
1466 | void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1467 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 JV |
1468 | |
1469 | #ifdef CONFIG_IP_VS_IPV6 | |
5c3a0fd7 JP |
1470 | void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1471 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 | 1472 | #endif |
1da177e4 | 1473 | |
5c3a0fd7 | 1474 | __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1475 | |
f9214b26 | 1476 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1477 | { |
f9214b26 | 1478 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1479 | |
07f0757a | 1480 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1481 | } |
1482 | ||
0bbdd42b JV |
1483 | #ifdef CONFIG_IP_VS_IPV6 |
1484 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1485 | __wsum oldsum) | |
1486 | { | |
1487 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1488 | new[3], new[2], new[1], new[0] }; | |
1489 | ||
07f0757a | 1490 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1491 | } |
1492 | #endif | |
1493 | ||
f9214b26 AV |
1494 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1495 | { | |
1496 | __be16 diff[2] = { ~old, new }; | |
1497 | ||
07f0757a | 1498 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1499 | } |
1500 | ||
07dcc686 | 1501 | /* Forget current conntrack (unconfirmed) and attach notrack entry */ |
cf356d69 JA |
1502 | static inline void ip_vs_notrack(struct sk_buff *skb) |
1503 | { | |
1504 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1505 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1506 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 JA |
1507 | |
1508 | if (!ct || !nf_ct_is_untracked(ct)) { | |
9e33ce45 | 1509 | nf_conntrack_put(skb->nfct); |
cf356d69 JA |
1510 | skb->nfct = &nf_ct_untracked_get()->ct_general; |
1511 | skb->nfctinfo = IP_CT_NEW; | |
1512 | nf_conntrack_get(skb->nfct); | |
1513 | } | |
1514 | #endif | |
1515 | } | |
1516 | ||
f4bc17cd | 1517 | #ifdef CONFIG_IP_VS_NFCT |
07dcc686 SH |
1518 | /* Netfilter connection tracking |
1519 | * (from ip_vs_nfct.c) | |
f4bc17cd | 1520 | */ |
a0840e2e | 1521 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1522 | { |
a4e2f5a7 | 1523 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1524 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1525 | #else |
1526 | return 0; | |
1527 | #endif | |
f4bc17cd JA |
1528 | } |
1529 | ||
5c3a0fd7 JP |
1530 | void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1531 | int outin); | |
1532 | int ip_vs_confirm_conntrack(struct sk_buff *skb); | |
1533 | void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1534 | struct ip_vs_conn *cp, u_int8_t proto, | |
1535 | const __be16 port, int from_rs); | |
1536 | void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
f4bc17cd JA |
1537 | |
1538 | #else | |
1539 | ||
a0840e2e | 1540 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1541 | { |
1542 | return 0; | |
1543 | } | |
1544 | ||
1545 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1546 | struct ip_vs_conn *cp, int outin) | |
1547 | { | |
1548 | } | |
1549 | ||
e23ebf0f | 1550 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
f4bc17cd JA |
1551 | { |
1552 | return NF_ACCEPT; | |
1553 | } | |
1554 | ||
1555 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1556 | { | |
1557 | } | |
07dcc686 | 1558 | #endif /* CONFIG_IP_VS_NFCT */ |
6523ce15 | 1559 | |
c16526a7 | 1560 | static inline int |
b552f7e3 CG |
1561 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) |
1562 | { | |
07dcc686 | 1563 | /* We think the overhead of processing active connections is 256 |
b552f7e3 CG |
1564 | * times higher than that of inactive connections in average. (This |
1565 | * 256 times might not be accurate, we will change it later) We | |
1566 | * use the following formula to estimate the overhead now: | |
1567 | * dest->activeconns*256 + dest->inactconns | |
1568 | */ | |
1569 | return (atomic_read(&dest->activeconns) << 8) + | |
1570 | atomic_read(&dest->inactconns); | |
1571 | } | |
1572 | ||
bc4768eb | 1573 | #endif /* _NET_IP_VS_H */ |