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 | ||
4fd9beef AG |
32 | #define IP_VS_HDR_INVERSE 1 |
33 | #define IP_VS_HDR_ICMP 2 | |
34 | ||
07dcc686 | 35 | /* Generic access of ipvs struct */ |
61b1ab45 HS |
36 | static inline struct netns_ipvs *net_ipvs(struct net* net) |
37 | { | |
38 | return net->ipvs; | |
39 | } | |
07dcc686 | 40 | |
07dcc686 | 41 | /* This one needed for single_open_net since net is stored directly in |
25985edc | 42 | * private not as a struct i.e. seq_file_net can't be used. |
b17fc996 HS |
43 | */ |
44 | static inline struct net *seq_file_single_net(struct seq_file *seq) | |
45 | { | |
46 | #ifdef CONFIG_NET_NS | |
47 | return (struct net *)seq->private; | |
48 | #else | |
49 | return &init_net; | |
50 | #endif | |
51 | } | |
6f7edb48 CB |
52 | |
53 | /* Connections' size value needed by ip_vs_ctl.c */ | |
54 | extern int ip_vs_conn_tab_size; | |
55 | ||
64aae3cb | 56 | struct ip_vs_iphdr { |
4fd9beef | 57 | int hdr_flags; /* ipvs flags */ |
b0e010c5 | 58 | __u32 off; /* Where IP or IPv4 header starts */ |
63dca2c0 | 59 | __u32 len; /* IPv4 simply where L4 starts |
07dcc686 | 60 | * IPv6 where L4 Transport Header starts */ |
63dca2c0 JDB |
61 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ |
62 | __s16 protocol; | |
63 | __s32 flags; | |
64aae3cb JV |
64 | union nf_inet_addr saddr; |
65 | union nf_inet_addr daddr; | |
66 | }; | |
67 | ||
2f74713d JDB |
68 | static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, |
69 | int len, void *buffer, | |
70 | const struct ip_vs_iphdr *ipvsh) | |
71 | { | |
72 | return skb_header_pointer(skb, offset, len, buffer); | |
73 | } | |
2f74713d | 74 | |
63dca2c0 JDB |
75 | /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. |
76 | * IPv6 requires some extra work, as finding proper header position, | |
77 | * depend on the IPv6 extension headers. | |
78 | */ | |
b0e010c5 AG |
79 | static inline int |
80 | ip_vs_fill_iph_skb_off(int af, const struct sk_buff *skb, int offset, | |
4fd9beef | 81 | int hdr_flags, struct ip_vs_iphdr *iphdr) |
64aae3cb | 82 | { |
4fd9beef | 83 | iphdr->hdr_flags = hdr_flags; |
b0e010c5 | 84 | iphdr->off = offset; |
4fd9beef | 85 | |
64aae3cb JV |
86 | #ifdef CONFIG_IP_VS_IPV6 |
87 | if (af == AF_INET6) { | |
b0e010c5 AG |
88 | struct ipv6hdr _iph; |
89 | const struct ipv6hdr *iph = skb_header_pointer( | |
90 | skb, offset, sizeof(_iph), &_iph); | |
91 | if (!iph) | |
92 | return 0; | |
93 | ||
4e3fd7a0 AD |
94 | iphdr->saddr.in6 = iph->saddr; |
95 | iphdr->daddr.in6 = iph->daddr; | |
6aafeef0 | 96 | /* ipv6_find_hdr() updates len, flags */ |
b0e010c5 | 97 | iphdr->len = offset; |
63dca2c0 JDB |
98 | iphdr->flags = 0; |
99 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
100 | &iphdr->fragoffs, | |
101 | &iphdr->flags); | |
b0e010c5 AG |
102 | if (iphdr->protocol < 0) |
103 | return 0; | |
64aae3cb JV |
104 | } else |
105 | #endif | |
106 | { | |
b0e010c5 AG |
107 | struct iphdr _iph; |
108 | const struct iphdr *iph = skb_header_pointer( | |
109 | skb, offset, sizeof(_iph), &_iph); | |
110 | if (!iph) | |
111 | return 0; | |
112 | ||
113 | iphdr->len = offset + iph->ihl * 4; | |
63dca2c0 JDB |
114 | iphdr->fragoffs = 0; |
115 | iphdr->protocol = iph->protocol; | |
116 | iphdr->saddr.ip = iph->saddr; | |
117 | iphdr->daddr.ip = iph->daddr; | |
118 | } | |
b0e010c5 AG |
119 | |
120 | return 1; | |
121 | } | |
122 | ||
123 | static inline int | |
4fd9beef AG |
124 | ip_vs_fill_iph_skb_icmp(int af, const struct sk_buff *skb, int offset, |
125 | bool inverse, struct ip_vs_iphdr *iphdr) | |
126 | { | |
127 | int hdr_flags = IP_VS_HDR_ICMP; | |
128 | ||
129 | if (inverse) | |
130 | hdr_flags |= IP_VS_HDR_INVERSE; | |
131 | ||
132 | return ip_vs_fill_iph_skb_off(af, skb, offset, hdr_flags, iphdr); | |
133 | } | |
134 | ||
135 | static inline int | |
136 | ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, bool inverse, | |
137 | struct ip_vs_iphdr *iphdr) | |
138 | { | |
139 | int hdr_flags = 0; | |
140 | ||
141 | if (inverse) | |
142 | hdr_flags |= IP_VS_HDR_INVERSE; | |
143 | ||
144 | return ip_vs_fill_iph_skb_off(af, skb, skb_network_offset(skb), | |
145 | hdr_flags, iphdr); | |
146 | } | |
147 | ||
148 | static inline bool | |
149 | ip_vs_iph_inverse(const struct ip_vs_iphdr *iph) | |
150 | { | |
151 | return !!(iph->hdr_flags & IP_VS_HDR_INVERSE); | |
152 | } | |
153 | ||
154 | static inline bool | |
155 | ip_vs_iph_icmp(const struct ip_vs_iphdr *iph) | |
b0e010c5 | 156 | { |
4fd9beef | 157 | return !!(iph->hdr_flags & IP_VS_HDR_ICMP); |
63dca2c0 JDB |
158 | } |
159 | ||
64aae3cb JV |
160 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, |
161 | const union nf_inet_addr *src) | |
162 | { | |
163 | #ifdef CONFIG_IP_VS_IPV6 | |
164 | if (af == AF_INET6) | |
4e3fd7a0 | 165 | dst->in6 = src->in6; |
64aae3cb JV |
166 | else |
167 | #endif | |
168 | dst->ip = src->ip; | |
169 | } | |
170 | ||
9a05475c JA |
171 | static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst, |
172 | const union nf_inet_addr *src) | |
173 | { | |
174 | #ifdef CONFIG_IP_VS_IPV6 | |
175 | if (af == AF_INET6) { | |
176 | dst->in6 = src->in6; | |
177 | return; | |
178 | } | |
179 | #endif | |
180 | dst->ip = src->ip; | |
181 | dst->all[1] = 0; | |
182 | dst->all[2] = 0; | |
183 | dst->all[3] = 0; | |
184 | } | |
185 | ||
64aae3cb JV |
186 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, |
187 | const union nf_inet_addr *b) | |
188 | { | |
189 | #ifdef CONFIG_IP_VS_IPV6 | |
190 | if (af == AF_INET6) | |
191 | return ipv6_addr_equal(&a->in6, &b->in6); | |
192 | #endif | |
193 | return a->ip == b->ip; | |
194 | } | |
195 | ||
1da177e4 | 196 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
197 | #include <linux/net.h> |
198 | ||
5c3a0fd7 | 199 | int ip_vs_get_debug_level(void); |
c842a3ad JV |
200 | |
201 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
202 | const union nf_inet_addr *addr, | |
203 | int *idx) | |
204 | { | |
205 | int len; | |
206 | #ifdef CONFIG_IP_VS_IPV6 | |
207 | if (af == AF_INET6) | |
120b9c14 | 208 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
0c6ce78a | 209 | &addr->in6) + 1; |
c842a3ad JV |
210 | else |
211 | #endif | |
3685f25d HH |
212 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
213 | &addr->ip) + 1; | |
c842a3ad JV |
214 | |
215 | *idx += len; | |
216 | BUG_ON(*idx > buf_len + 1); | |
217 | return &buf[*idx - len]; | |
218 | } | |
219 | ||
9aada7ac HE |
220 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
221 | do { \ | |
222 | char ip_vs_dbg_buf[160]; \ | |
223 | int ip_vs_dbg_idx = 0; \ | |
224 | if (level <= ip_vs_get_debug_level()) \ | |
225 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
226 | } while (0) | |
227 | #define IP_VS_ERR_BUF(msg...) \ | |
228 | do { \ | |
229 | char ip_vs_dbg_buf[160]; \ | |
230 | int ip_vs_dbg_idx = 0; \ | |
231 | pr_err(msg); \ | |
232 | } while (0) | |
c842a3ad JV |
233 | |
234 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
235 | #define IP_VS_DBG_ADDR(af, addr) \ |
236 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
237 | sizeof(ip_vs_dbg_buf), addr, \ | |
238 | &ip_vs_dbg_idx) | |
239 | ||
240 | #define IP_VS_DBG(level, msg, ...) \ | |
241 | do { \ | |
242 | if (level <= ip_vs_get_debug_level()) \ | |
243 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
244 | } while (0) | |
245 | #define IP_VS_DBG_RL(msg, ...) \ | |
246 | do { \ | |
247 | if (net_ratelimit()) \ | |
248 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
249 | } while (0) | |
0d79641a | 250 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
251 | do { \ |
252 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 253 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 254 | } while (0) |
0d79641a | 255 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
256 | do { \ |
257 | if (level <= ip_vs_get_debug_level() && \ | |
258 | net_ratelimit()) \ | |
0d79641a | 259 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 260 | } while (0) |
1da177e4 | 261 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
262 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
263 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
264 | #define IP_VS_DBG(level, msg...) do {} while (0) |
265 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
266 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
267 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
268 | #endif |
269 | ||
270 | #define IP_VS_BUG() BUG() | |
1e3e238e | 271 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
272 | do { \ |
273 | if (net_ratelimit()) \ | |
1e3e238e | 274 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 275 | } while (0) |
1da177e4 LT |
276 | |
277 | #ifdef CONFIG_IP_VS_DEBUG | |
278 | #define EnterFunction(level) \ | |
9aada7ac HE |
279 | do { \ |
280 | if (level <= ip_vs_get_debug_level()) \ | |
281 | printk(KERN_DEBUG \ | |
282 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
283 | __func__, __FILE__, __LINE__); \ | |
284 | } while (0) | |
285 | #define LeaveFunction(level) \ | |
286 | do { \ | |
287 | if (level <= ip_vs_get_debug_level()) \ | |
288 | printk(KERN_DEBUG \ | |
289 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
290 | __func__, __FILE__, __LINE__); \ | |
291 | } while (0) | |
1da177e4 LT |
292 | #else |
293 | #define EnterFunction(level) do {} while (0) | |
294 | #define LeaveFunction(level) do {} while (0) | |
295 | #endif | |
296 | ||
07dcc686 | 297 | /* The port number of FTP service (in network order). */ |
f3a7c66b HH |
298 | #define FTPPORT cpu_to_be16(21) |
299 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 300 | |
07dcc686 | 301 | /* TCP State Values */ |
1da177e4 LT |
302 | enum { |
303 | IP_VS_TCP_S_NONE = 0, | |
304 | IP_VS_TCP_S_ESTABLISHED, | |
305 | IP_VS_TCP_S_SYN_SENT, | |
306 | IP_VS_TCP_S_SYN_RECV, | |
307 | IP_VS_TCP_S_FIN_WAIT, | |
308 | IP_VS_TCP_S_TIME_WAIT, | |
309 | IP_VS_TCP_S_CLOSE, | |
310 | IP_VS_TCP_S_CLOSE_WAIT, | |
311 | IP_VS_TCP_S_LAST_ACK, | |
312 | IP_VS_TCP_S_LISTEN, | |
313 | IP_VS_TCP_S_SYNACK, | |
314 | IP_VS_TCP_S_LAST | |
315 | }; | |
316 | ||
07dcc686 | 317 | /* UDP State Values */ |
1da177e4 LT |
318 | enum { |
319 | IP_VS_UDP_S_NORMAL, | |
320 | IP_VS_UDP_S_LAST, | |
321 | }; | |
322 | ||
07dcc686 | 323 | /* ICMP State Values */ |
1da177e4 LT |
324 | enum { |
325 | IP_VS_ICMP_S_NORMAL, | |
326 | IP_VS_ICMP_S_LAST, | |
327 | }; | |
328 | ||
07dcc686 | 329 | /* SCTP State Values */ |
2906f66a VMR |
330 | enum ip_vs_sctp_states { |
331 | IP_VS_SCTP_S_NONE, | |
61e7c420 JA |
332 | IP_VS_SCTP_S_INIT1, |
333 | IP_VS_SCTP_S_INIT, | |
334 | IP_VS_SCTP_S_COOKIE_SENT, | |
335 | IP_VS_SCTP_S_COOKIE_REPLIED, | |
336 | IP_VS_SCTP_S_COOKIE_WAIT, | |
337 | IP_VS_SCTP_S_COOKIE, | |
338 | IP_VS_SCTP_S_COOKIE_ECHOED, | |
2906f66a | 339 | IP_VS_SCTP_S_ESTABLISHED, |
61e7c420 JA |
340 | IP_VS_SCTP_S_SHUTDOWN_SENT, |
341 | IP_VS_SCTP_S_SHUTDOWN_RECEIVED, | |
342 | IP_VS_SCTP_S_SHUTDOWN_ACK_SENT, | |
343 | IP_VS_SCTP_S_REJECTED, | |
2906f66a VMR |
344 | IP_VS_SCTP_S_CLOSED, |
345 | IP_VS_SCTP_S_LAST | |
346 | }; | |
347 | ||
07dcc686 SH |
348 | /* Delta sequence info structure |
349 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
350 | * Only used in the VS/NAT. | |
1da177e4 LT |
351 | */ |
352 | struct ip_vs_seq { | |
353 | __u32 init_seq; /* Add delta from this seq */ | |
354 | __u32 delta; /* Delta in sequence numbers */ | |
355 | __u32 previous_delta; /* Delta in sequence numbers | |
07dcc686 | 356 | * before last resized pkt */ |
1da177e4 LT |
357 | }; |
358 | ||
07dcc686 | 359 | /* counters per cpu */ |
b17fc996 | 360 | struct ip_vs_counters { |
cd67cd5e JA |
361 | __u64 conns; /* connections scheduled */ |
362 | __u64 inpkts; /* incoming packets */ | |
363 | __u64 outpkts; /* outgoing packets */ | |
b17fc996 HS |
364 | __u64 inbytes; /* incoming bytes */ |
365 | __u64 outbytes; /* outgoing bytes */ | |
366 | }; | |
07dcc686 | 367 | /* Stats per cpu */ |
b17fc996 | 368 | struct ip_vs_cpu_stats { |
cd67cd5e | 369 | struct ip_vs_counters cnt; |
b17fc996 HS |
370 | struct u64_stats_sync syncp; |
371 | }; | |
1da177e4 | 372 | |
07dcc686 | 373 | /* IPVS statistics objects */ |
3a14a313 SW |
374 | struct ip_vs_estimator { |
375 | struct list_head list; | |
376 | ||
377 | u64 last_inbytes; | |
378 | u64 last_outbytes; | |
cd67cd5e JA |
379 | u64 last_conns; |
380 | u64 last_inpkts; | |
381 | u64 last_outpkts; | |
382 | ||
383 | u64 cps; | |
384 | u64 inpps; | |
385 | u64 outpps; | |
386 | u64 inbps; | |
387 | u64 outbps; | |
388 | }; | |
389 | ||
390 | /* | |
391 | * IPVS statistics object, 64-bit kernel version of struct ip_vs_stats_user | |
392 | */ | |
393 | struct ip_vs_kstats { | |
394 | u64 conns; /* connections scheduled */ | |
395 | u64 inpkts; /* incoming packets */ | |
396 | u64 outpkts; /* outgoing packets */ | |
397 | u64 inbytes; /* incoming bytes */ | |
398 | u64 outbytes; /* outgoing bytes */ | |
399 | ||
400 | u64 cps; /* current connection rate */ | |
401 | u64 inpps; /* current in packet rate */ | |
402 | u64 outpps; /* current out packet rate */ | |
403 | u64 inbps; /* current in byte rate */ | |
404 | u64 outbps; /* current out byte rate */ | |
3a14a313 SW |
405 | }; |
406 | ||
fd2c3ef7 | 407 | struct ip_vs_stats { |
cd67cd5e | 408 | struct ip_vs_kstats kstats; /* kernel statistics */ |
e9c0ce23 | 409 | struct ip_vs_estimator est; /* estimator */ |
b962abdc | 410 | struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ |
b17fc996 | 411 | spinlock_t lock; /* spin lock */ |
cd67cd5e | 412 | struct ip_vs_kstats kstats0; /* reset values */ |
1da177e4 LT |
413 | }; |
414 | ||
14c85021 ACM |
415 | struct dst_entry; |
416 | struct iphdr; | |
1da177e4 LT |
417 | struct ip_vs_conn; |
418 | struct ip_vs_app; | |
14c85021 | 419 | struct sk_buff; |
252c6410 | 420 | struct ip_vs_proto_data; |
1da177e4 LT |
421 | |
422 | struct ip_vs_protocol { | |
423 | struct ip_vs_protocol *next; | |
424 | char *name; | |
2ad17def JA |
425 | u16 protocol; |
426 | u16 num_states; | |
1da177e4 | 427 | int dont_defrag; |
1da177e4 LT |
428 | |
429 | void (*init)(struct ip_vs_protocol *pp); | |
430 | ||
431 | void (*exit)(struct ip_vs_protocol *pp); | |
432 | ||
1281a9c2 | 433 | int (*init_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 434 | |
1281a9c2 | 435 | void (*exit_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 436 | |
d8f44c33 EB |
437 | int (*conn_schedule)(struct netns_ipvs *ipvs, |
438 | int af, struct sk_buff *skb, | |
9330419d | 439 | struct ip_vs_proto_data *pd, |
d4383f04 JDB |
440 | int *verdict, struct ip_vs_conn **cpp, |
441 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
442 | |
443 | struct ip_vs_conn * | |
ab161976 EB |
444 | (*conn_in_get)(struct netns_ipvs *ipvs, |
445 | int af, | |
51ef348b | 446 | const struct sk_buff *skb, |
802c41ad | 447 | const struct ip_vs_iphdr *iph); |
1da177e4 LT |
448 | |
449 | struct ip_vs_conn * | |
0cf705c8 EB |
450 | (*conn_out_get)(struct netns_ipvs *ipvs, |
451 | int af, | |
51ef348b | 452 | const struct sk_buff *skb, |
802c41ad | 453 | const struct ip_vs_iphdr *iph); |
1da177e4 | 454 | |
d4383f04 JDB |
455 | int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
456 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 457 | |
d4383f04 JDB |
458 | int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
459 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 460 | |
51ef348b JV |
461 | int (*csum_check)(int af, struct sk_buff *skb, |
462 | struct ip_vs_protocol *pp); | |
1da177e4 LT |
463 | |
464 | const char *(*state_name)(int state); | |
465 | ||
4a516f11 SH |
466 | void (*state_transition)(struct ip_vs_conn *cp, int direction, |
467 | const struct sk_buff *skb, | |
468 | struct ip_vs_proto_data *pd); | |
1da177e4 | 469 | |
19648918 | 470 | int (*register_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 | 471 | |
19648918 | 472 | void (*unregister_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 LT |
473 | |
474 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
475 | ||
0d79641a | 476 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
477 | const struct sk_buff *skb, |
478 | int offset, | |
479 | const char *msg); | |
480 | ||
9330419d | 481 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
1da177e4 LT |
482 | }; |
483 | ||
07dcc686 | 484 | /* protocol data per netns */ |
252c6410 HS |
485 | struct ip_vs_proto_data { |
486 | struct ip_vs_proto_data *next; | |
487 | struct ip_vs_protocol *pp; | |
488 | int *timeout_table; /* protocol timeout table */ | |
489 | atomic_t appcnt; /* counter of proto app incs. */ | |
490 | struct tcp_states_t *tcp_state_table; | |
491 | }; | |
492 | ||
5c3a0fd7 | 493 | struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); |
18d6ade6 | 494 | struct ip_vs_proto_data *ip_vs_proto_data_get(struct netns_ipvs *ipvs, |
5c3a0fd7 | 495 | unsigned short proto); |
1da177e4 | 496 | |
f11017ec | 497 | struct ip_vs_conn_param { |
e64e2b46 | 498 | struct netns_ipvs *ipvs; |
f11017ec SH |
499 | const union nf_inet_addr *caddr; |
500 | const union nf_inet_addr *vaddr; | |
501 | __be16 cport; | |
502 | __be16 vport; | |
503 | __u16 protocol; | |
504 | u16 af; | |
85999283 SH |
505 | |
506 | const struct ip_vs_pe *pe; | |
507 | char *pe_data; | |
508 | __u8 pe_data_len; | |
f11017ec SH |
509 | }; |
510 | ||
07dcc686 | 511 | /* IP_VS structure allocated for each dynamically scheduled connection */ |
1da177e4 | 512 | struct ip_vs_conn { |
731109e7 | 513 | struct hlist_node c_list; /* hashed list heads */ |
1da177e4 | 514 | /* Protocol, addresses and port numbers */ |
6e67e586 | 515 | __be16 cport; |
6e67e586 | 516 | __be16 dport; |
1845ed0b JA |
517 | __be16 vport; |
518 | u16 af; /* address family */ | |
6e67e586 HS |
519 | union nf_inet_addr caddr; /* client address */ |
520 | union nf_inet_addr vaddr; /* virtual address */ | |
521 | union nf_inet_addr daddr; /* destination address */ | |
522 | volatile __u32 flags; /* status flags */ | |
1da177e4 | 523 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
ba38528a | 524 | __u16 daf; /* Address family of the dest */ |
58dbc6f2 | 525 | struct netns_ipvs *ipvs; |
1da177e4 LT |
526 | |
527 | /* counter and timer */ | |
528 | atomic_t refcnt; /* reference count */ | |
529 | struct timer_list timer; /* Expiration timer */ | |
530 | volatile unsigned long timeout; /* timeout */ | |
531 | ||
532 | /* Flags and state transition */ | |
533 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 534 | volatile __u16 state; /* state info */ |
efac5276 RB |
535 | volatile __u16 old_state; /* old state, to be used for |
536 | * state transition triggerd | |
537 | * synchronization | |
538 | */ | |
1845ed0b | 539 | __u32 fwmark; /* Fire wall mark from skb */ |
749c42b6 | 540 | unsigned long sync_endtime; /* jiffies + sent_retries */ |
1da177e4 LT |
541 | |
542 | /* Control members */ | |
543 | struct ip_vs_conn *control; /* Master control connection */ | |
544 | atomic_t n_control; /* Number of controlled ones */ | |
545 | struct ip_vs_dest *dest; /* real server */ | |
546 | atomic_t in_pkts; /* incoming packet counter */ | |
547 | ||
07dcc686 SH |
548 | /* Packet transmitter for different forwarding methods. If it |
549 | * mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
550 | * otherwise this must be changed to a sk_buff **. | |
551 | * NF_ACCEPT can be returned when destination is local. | |
1da177e4 LT |
552 | */ |
553 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
d4383f04 | 554 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
1da177e4 LT |
555 | |
556 | /* Note: we can group the following members into a structure, | |
07dcc686 SH |
557 | * in order to save more space, and the following members are |
558 | * only used in VS/NAT anyway | |
559 | */ | |
1da177e4 LT |
560 | struct ip_vs_app *app; /* bound ip_vs_app object */ |
561 | void *app_data; /* Application private data */ | |
562 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
563 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
85999283 | 564 | |
e9e5eee8 | 565 | const struct ip_vs_pe *pe; |
85999283 SH |
566 | char *pe_data; |
567 | __u8 pe_data_len; | |
088339a5 JA |
568 | |
569 | struct rcu_head rcu_head; | |
1da177e4 LT |
570 | }; |
571 | ||
07dcc686 SH |
572 | /* Extended internal versions of struct ip_vs_service_user and ip_vs_dest_user |
573 | * for IPv6 support. | |
c860c6b1 | 574 | * |
07dcc686 SH |
575 | * We need these to conveniently pass around service and destination |
576 | * options, but unfortunately, we also need to keep the old definitions to | |
577 | * maintain userspace backwards compatibility for the setsockopt interface. | |
c860c6b1 JV |
578 | */ |
579 | struct ip_vs_service_user_kern { | |
580 | /* virtual service addresses */ | |
581 | u16 af; | |
582 | u16 protocol; | |
583 | union nf_inet_addr addr; /* virtual ip address */ | |
0a925864 | 584 | __be16 port; |
c860c6b1 JV |
585 | u32 fwmark; /* firwall mark of service */ |
586 | ||
587 | /* virtual service options */ | |
588 | char *sched_name; | |
0d1e71b0 | 589 | char *pe_name; |
95c96174 ED |
590 | unsigned int flags; /* virtual service flags */ |
591 | unsigned int timeout; /* persistent timeout in sec */ | |
0a925864 | 592 | __be32 netmask; /* persistent netmask or plen */ |
c860c6b1 JV |
593 | }; |
594 | ||
595 | ||
596 | struct ip_vs_dest_user_kern { | |
597 | /* destination server address */ | |
598 | union nf_inet_addr addr; | |
0a925864 | 599 | __be16 port; |
c860c6b1 JV |
600 | |
601 | /* real server options */ | |
95c96174 | 602 | unsigned int conn_flags; /* connection flags */ |
c860c6b1 JV |
603 | int weight; /* destination weight */ |
604 | ||
605 | /* thresholds for active connections */ | |
606 | u32 u_threshold; /* upper threshold */ | |
607 | u32 l_threshold; /* lower threshold */ | |
6cff339b AG |
608 | |
609 | /* Address family of addr */ | |
610 | u16 af; | |
c860c6b1 JV |
611 | }; |
612 | ||
613 | ||
1da177e4 | 614 | /* |
07dcc686 SH |
615 | * The information about the virtual service offered to the net and the |
616 | * forwarding entries. | |
1da177e4 LT |
617 | */ |
618 | struct ip_vs_service { | |
ceec4c38 JA |
619 | struct hlist_node s_list; /* for normal service table */ |
620 | struct hlist_node f_list; /* for fwmark-based service table */ | |
1da177e4 | 621 | atomic_t refcnt; /* reference counter */ |
1da177e4 | 622 | |
e7ade46a | 623 | u16 af; /* address family */ |
1da177e4 | 624 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 625 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 626 | __be16 port; /* port number for the service */ |
1da177e4 | 627 | __u32 fwmark; /* firewall mark of the service */ |
95c96174 ED |
628 | unsigned int flags; /* service status flags */ |
629 | unsigned int timeout; /* persistent timeout in ticks */ | |
0a925864 | 630 | __be32 netmask; /* grouping granularity, mask/plen */ |
3109d2f2 | 631 | struct netns_ipvs *ipvs; |
1da177e4 LT |
632 | |
633 | struct list_head destinations; /* real server d-linked list */ | |
634 | __u32 num_dests; /* number of servers */ | |
635 | struct ip_vs_stats stats; /* statistics for the service */ | |
1da177e4 LT |
636 | |
637 | /* for scheduling */ | |
ceec4c38 | 638 | struct ip_vs_scheduler __rcu *scheduler; /* bound scheduler object */ |
ba3a3ce1 | 639 | spinlock_t sched_lock; /* lock sched_data */ |
1da177e4 | 640 | void *sched_data; /* scheduler application data */ |
85999283 SH |
641 | |
642 | /* alternate persistence engine */ | |
ceec4c38 JA |
643 | struct ip_vs_pe __rcu *pe; |
644 | ||
645 | struct rcu_head rcu_head; | |
1da177e4 LT |
646 | }; |
647 | ||
026ace06 JA |
648 | /* Information for cached dst */ |
649 | struct ip_vs_dest_dst { | |
650 | struct dst_entry *dst_cache; /* destination cache entry */ | |
651 | u32 dst_cookie; | |
652 | union nf_inet_addr dst_saddr; | |
653 | struct rcu_head rcu_head; | |
654 | }; | |
1da177e4 | 655 | |
07dcc686 SH |
656 | /* The real server destination forwarding entry with ip address, port number, |
657 | * and so on. | |
1da177e4 LT |
658 | */ |
659 | struct ip_vs_dest { | |
660 | struct list_head n_list; /* for the dests in the service */ | |
276472ea | 661 | struct hlist_node d_list; /* for table with all the dests */ |
1da177e4 | 662 | |
e7ade46a | 663 | u16 af; /* address family */ |
014d730d | 664 | __be16 port; /* port number of the server */ |
f2431e6e | 665 | union nf_inet_addr addr; /* IP address of the server */ |
95c96174 | 666 | volatile unsigned int flags; /* dest status flags */ |
1da177e4 LT |
667 | atomic_t conn_flags; /* flags to copy to conn */ |
668 | atomic_t weight; /* server weight */ | |
669 | ||
670 | atomic_t refcnt; /* reference counter */ | |
671 | struct ip_vs_stats stats; /* statistics */ | |
bcbde4c0 | 672 | unsigned long idle_start; /* start time, jiffies */ |
1da177e4 LT |
673 | |
674 | /* connection counters and thresholds */ | |
675 | atomic_t activeconns; /* active connections */ | |
676 | atomic_t inactconns; /* inactive connections */ | |
677 | atomic_t persistconns; /* persistent connections */ | |
678 | __u32 u_threshold; /* upper threshold */ | |
679 | __u32 l_threshold; /* lower threshold */ | |
680 | ||
681 | /* for destination cache */ | |
682 | spinlock_t dst_lock; /* lock of dst_cache */ | |
026ace06 | 683 | struct ip_vs_dest_dst __rcu *dest_dst; /* cached dst info */ |
1da177e4 LT |
684 | |
685 | /* for virtual service */ | |
bcbde4c0 | 686 | struct ip_vs_service __rcu *svc; /* service it belongs to */ |
1da177e4 | 687 | __u16 protocol; /* which protocol (TCP/UDP) */ |
014d730d | 688 | __be16 vport; /* virtual port number */ |
f2431e6e | 689 | union nf_inet_addr vaddr; /* virtual IP address */ |
1da177e4 | 690 | __u32 vfwmark; /* firewall mark of service */ |
276472ea | 691 | |
578bc3ef | 692 | struct list_head t_list; /* in dest_trash */ |
276472ea | 693 | unsigned int in_rs_table:1; /* we are in rs_table */ |
1da177e4 LT |
694 | }; |
695 | ||
07dcc686 | 696 | /* The scheduler object */ |
1da177e4 LT |
697 | struct ip_vs_scheduler { |
698 | struct list_head n_list; /* d-linked list head */ | |
699 | char *name; /* scheduler name */ | |
700 | atomic_t refcnt; /* reference counter */ | |
701 | struct module *module; /* THIS_MODULE/NULL */ | |
702 | ||
703 | /* scheduler initializing service */ | |
704 | int (*init_service)(struct ip_vs_service *svc); | |
705 | /* scheduling service finish */ | |
ed3ffc4e | 706 | void (*done_service)(struct ip_vs_service *svc); |
6b6df466 JA |
707 | /* dest is linked */ |
708 | int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
709 | /* dest is unlinked */ | |
710 | int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
711 | /* dest is updated */ | |
712 | int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
1da177e4 LT |
713 | |
714 | /* selecting a server from the given service */ | |
715 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
bba54de5 JA |
716 | const struct sk_buff *skb, |
717 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
718 | }; |
719 | ||
85999283 SH |
720 | /* The persistence engine object */ |
721 | struct ip_vs_pe { | |
722 | struct list_head n_list; /* d-linked list head */ | |
723 | char *name; /* scheduler name */ | |
724 | atomic_t refcnt; /* reference counter */ | |
725 | struct module *module; /* THIS_MODULE/NULL */ | |
726 | ||
727 | /* get the connection template, if any */ | |
728 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
729 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
730 | struct ip_vs_conn *ct); | |
731 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
732 | bool inverse); | |
a3c918ac | 733 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
85999283 | 734 | }; |
1da177e4 | 735 | |
07dcc686 | 736 | /* The application module object (a.k.a. app incarnation) */ |
fd2c3ef7 | 737 | struct ip_vs_app { |
1da177e4 LT |
738 | struct list_head a_list; /* member in app list */ |
739 | int type; /* IP_VS_APP_TYPE_xxx */ | |
740 | char *name; /* application module name */ | |
741 | __u16 protocol; | |
742 | struct module *module; /* THIS_MODULE/NULL */ | |
743 | struct list_head incs_list; /* list of incarnations */ | |
744 | ||
745 | /* members for application incarnations */ | |
746 | struct list_head p_list; /* member in proto app list */ | |
747 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 748 | __be16 port; /* port number in net order */ |
1da177e4 | 749 | atomic_t usecnt; /* usage counter */ |
363c97d7 | 750 | struct rcu_head rcu_head; |
1da177e4 | 751 | |
07dcc686 | 752 | /* output hook: Process packet in inout direction, diff set for TCP. |
8b27b10f JA |
753 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
754 | * 2=Mangled but checksum was not updated | |
755 | */ | |
1da177e4 | 756 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 757 | struct sk_buff *, int *diff); |
1da177e4 | 758 | |
07dcc686 | 759 | /* input hook: Process packet in outin direction, diff set for TCP. |
8b27b10f JA |
760 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
761 | * 2=Mangled but checksum was not updated | |
762 | */ | |
1da177e4 | 763 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 764 | struct sk_buff *, int *diff); |
1da177e4 LT |
765 | |
766 | /* ip_vs_app initializer */ | |
767 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
768 | ||
769 | /* ip_vs_app finish */ | |
770 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
771 | ||
772 | ||
773 | /* not used now */ | |
774 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
775 | struct ip_vs_protocol *); | |
776 | ||
777 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
778 | ||
779 | int * timeout_table; | |
780 | int * timeouts; | |
781 | int timeouts_size; | |
782 | ||
783 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
784 | int *verdict, struct ip_vs_conn **cpp); | |
785 | ||
786 | struct ip_vs_conn * | |
787 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 788 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
789 | |
790 | struct ip_vs_conn * | |
791 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 792 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
793 | |
794 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
795 | const struct sk_buff *skb, | |
796 | struct ip_vs_app *app); | |
797 | ||
798 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
799 | }; | |
800 | ||
f73181c8 PNA |
801 | struct ipvs_master_sync_state { |
802 | struct list_head sync_queue; | |
803 | struct ip_vs_sync_buff *sync_buff; | |
07995674 | 804 | unsigned long sync_queue_len; |
f73181c8 PNA |
805 | unsigned int sync_queue_delay; |
806 | struct task_struct *master_thread; | |
807 | struct delayed_work master_wakeup_work; | |
808 | struct netns_ipvs *ipvs; | |
809 | }; | |
810 | ||
578bc3ef JA |
811 | /* How much time to keep dests in trash */ |
812 | #define IP_VS_DEST_TRASH_PERIOD (120 * HZ) | |
813 | ||
e4ff6751 | 814 | struct ipvs_sync_daemon_cfg { |
d3328817 | 815 | union nf_inet_addr mcast_group; |
e4ff6751 JA |
816 | int syncid; |
817 | u16 sync_maxlen; | |
d3328817 JA |
818 | u16 mcast_port; |
819 | u8 mcast_af; | |
820 | u8 mcast_ttl; | |
e4ff6751 JA |
821 | /* multicast interface name */ |
822 | char mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
823 | }; | |
824 | ||
2553d064 JA |
825 | /* IPVS in network namespace */ |
826 | struct netns_ipvs { | |
827 | int gen; /* Generation */ | |
7a4f0761 | 828 | int enable; /* enable like nf_hooks do */ |
07dcc686 | 829 | /* Hash table: for real service lookups */ |
2553d064 JA |
830 | #define IP_VS_RTAB_BITS 4 |
831 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
832 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
833 | ||
276472ea | 834 | struct hlist_head rs_table[IP_VS_RTAB_SIZE]; |
2553d064 JA |
835 | /* ip_vs_app */ |
836 | struct list_head app_list; | |
2553d064 JA |
837 | /* ip_vs_proto */ |
838 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
839 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
840 | /* ip_vs_proto_tcp */ | |
841 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
842 | #define TCP_APP_TAB_BITS 4 | |
843 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
844 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
845 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
2553d064 JA |
846 | #endif |
847 | /* ip_vs_proto_udp */ | |
848 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
849 | #define UDP_APP_TAB_BITS 4 | |
850 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
851 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
852 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
2553d064 JA |
853 | #endif |
854 | /* ip_vs_proto_sctp */ | |
855 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
856 | #define SCTP_APP_TAB_BITS 4 | |
857 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
858 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
859 | /* Hash table for SCTP application incarnations */ | |
860 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
2553d064 JA |
861 | #endif |
862 | /* ip_vs_conn */ | |
07dcc686 | 863 | atomic_t conn_count; /* connection counter */ |
2553d064 JA |
864 | |
865 | /* ip_vs_ctl */ | |
2a0751af | 866 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
2553d064 JA |
867 | |
868 | int num_services; /* no of virtual services */ | |
f2247fbd | 869 | |
f2247fbd SH |
870 | /* Trash for destinations */ |
871 | struct list_head dest_trash; | |
578bc3ef JA |
872 | spinlock_t dest_trash_lock; |
873 | struct timer_list dest_trash_timer; /* expiration timer */ | |
f2247fbd SH |
874 | /* Service counters */ |
875 | atomic_t ftpsvc_counter; | |
876 | atomic_t nullsvc_counter; | |
877 | ||
878 | #ifdef CONFIG_SYSCTL | |
2553d064 JA |
879 | /* 1/rate drop and drop-entry variables */ |
880 | struct delayed_work defense_work; /* Work handler */ | |
881 | int drop_rate; | |
882 | int drop_counter; | |
883 | atomic_t dropentry; | |
884 | /* locks in ctl.c */ | |
885 | spinlock_t dropentry_lock; /* drop entry handling */ | |
886 | spinlock_t droppacket_lock; /* drop packet handling */ | |
887 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
888 | |
889 | /* sys-ctl struct */ | |
890 | struct ctl_table_header *sysctl_hdr; | |
891 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
892 | #endif |
893 | ||
2553d064 JA |
894 | /* sysctl variables */ |
895 | int sysctl_amemthresh; | |
896 | int sysctl_am_droprate; | |
897 | int sysctl_drop_entry; | |
898 | int sysctl_drop_packet; | |
899 | int sysctl_secure_tcp; | |
900 | #ifdef CONFIG_IP_VS_NFCT | |
901 | int sysctl_conntrack; | |
902 | #endif | |
903 | int sysctl_snat_reroute; | |
904 | int sysctl_sync_ver; | |
f73181c8 | 905 | int sysctl_sync_ports; |
4d0c875d | 906 | int sysctl_sync_persist_mode; |
07995674 | 907 | unsigned long sysctl_sync_qlen_max; |
1c003b15 | 908 | int sysctl_sync_sock_size; |
2553d064 JA |
909 | int sysctl_cache_bypass; |
910 | int sysctl_expire_nodest_conn; | |
c6c96c18 AF |
911 | int sysctl_sloppy_tcp; |
912 | int sysctl_sloppy_sctp; | |
2553d064 JA |
913 | int sysctl_expire_quiescent_template; |
914 | int sysctl_sync_threshold[2]; | |
749c42b6 JA |
915 | unsigned int sysctl_sync_refresh_period; |
916 | int sysctl_sync_retries; | |
2553d064 | 917 | int sysctl_nat_icmp_send; |
3654e611 | 918 | int sysctl_pmtu_disc; |
0c12582f | 919 | int sysctl_backup_only; |
d752c364 | 920 | int sysctl_conn_reuse_mode; |
94485fed | 921 | int sysctl_schedule_icmp; |
4e478098 | 922 | int sysctl_ignore_tunneled; |
2553d064 JA |
923 | |
924 | /* ip_vs_lblc */ | |
925 | int sysctl_lblc_expiration; | |
926 | struct ctl_table_header *lblc_ctl_header; | |
927 | struct ctl_table *lblc_ctl_table; | |
928 | /* ip_vs_lblcr */ | |
929 | int sysctl_lblcr_expiration; | |
930 | struct ctl_table_header *lblcr_ctl_header; | |
931 | struct ctl_table *lblcr_ctl_table; | |
932 | /* ip_vs_est */ | |
933 | struct list_head est_list; /* estimator list */ | |
934 | spinlock_t est_lock; | |
935 | struct timer_list est_timer; /* Estimation timer */ | |
936 | /* ip_vs_sync */ | |
2553d064 | 937 | spinlock_t sync_lock; |
f73181c8 | 938 | struct ipvs_master_sync_state *ms; |
2553d064 | 939 | spinlock_t sync_buff_lock; |
f73181c8 PNA |
940 | struct task_struct **backup_threads; |
941 | int threads_mask; | |
2553d064 | 942 | volatile int sync_state; |
ae1d48b2 | 943 | struct mutex sync_mutex; |
e4ff6751 JA |
944 | struct ipvs_sync_daemon_cfg mcfg; /* Master Configuration */ |
945 | struct ipvs_sync_daemon_cfg bcfg; /* Backup Configuration */ | |
2553d064 JA |
946 | /* net name space ptr */ |
947 | struct net *net; /* Needed by timer routines */ | |
07dcc686 SH |
948 | /* Number of heterogeneous destinations, needed becaus heterogeneous |
949 | * are not supported when synchronization is enabled. | |
950 | */ | |
391f503d | 951 | unsigned int mixed_address_family_dests; |
2553d064 | 952 | }; |
1da177e4 | 953 | |
59e0350e SH |
954 | #define DEFAULT_SYNC_THRESHOLD 3 |
955 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 956 | #define DEFAULT_SYNC_VER 1 |
c6c96c18 AF |
957 | #define DEFAULT_SLOPPY_TCP 0 |
958 | #define DEFAULT_SLOPPY_SCTP 0 | |
749c42b6 JA |
959 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
960 | #define DEFAULT_SYNC_RETRIES 0 | |
1c003b15 PNA |
961 | #define IPVS_SYNC_WAKEUP_RATE 8 |
962 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
963 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
964 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
749c42b6 | 965 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
f73181c8 | 966 | #define IPVS_SYNC_PORTS_MAX (1 << 6) |
59e0350e SH |
967 | |
968 | #ifdef CONFIG_SYSCTL | |
969 | ||
970 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
971 | { | |
972 | return ipvs->sysctl_sync_threshold[0]; | |
973 | } | |
974 | ||
975 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
976 | { | |
749c42b6 JA |
977 | return ACCESS_ONCE(ipvs->sysctl_sync_threshold[1]); |
978 | } | |
979 | ||
980 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
981 | { | |
982 | return ACCESS_ONCE(ipvs->sysctl_sync_refresh_period); | |
983 | } | |
984 | ||
985 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
986 | { | |
987 | return ipvs->sysctl_sync_retries; | |
59e0350e SH |
988 | } |
989 | ||
7532e8d4 SH |
990 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
991 | { | |
992 | return ipvs->sysctl_sync_ver; | |
993 | } | |
994 | ||
c6c96c18 AF |
995 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
996 | { | |
997 | return ipvs->sysctl_sloppy_tcp; | |
998 | } | |
999 | ||
1000 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1001 | { | |
1002 | return ipvs->sysctl_sloppy_sctp; | |
1003 | } | |
1004 | ||
f73181c8 PNA |
1005 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1006 | { | |
1007 | return ACCESS_ONCE(ipvs->sysctl_sync_ports); | |
1008 | } | |
1009 | ||
4d0c875d JA |
1010 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1011 | { | |
1012 | return ipvs->sysctl_sync_persist_mode; | |
1013 | } | |
1014 | ||
07995674 | 1015 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1016 | { |
1017 | return ipvs->sysctl_sync_qlen_max; | |
1018 | } | |
1019 | ||
1020 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1021 | { | |
1022 | return ipvs->sysctl_sync_sock_size; | |
1023 | } | |
1024 | ||
3654e611 JA |
1025 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1026 | { | |
1027 | return ipvs->sysctl_pmtu_disc; | |
1028 | } | |
1029 | ||
0c12582f JA |
1030 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1031 | { | |
1032 | return ipvs->sync_state & IP_VS_STATE_BACKUP && | |
1033 | ipvs->sysctl_backup_only; | |
1034 | } | |
1035 | ||
d752c364 MRL |
1036 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1037 | { | |
1038 | return ipvs->sysctl_conn_reuse_mode; | |
1039 | } | |
1040 | ||
94485fed AG |
1041 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1042 | { | |
1043 | return ipvs->sysctl_schedule_icmp; | |
1044 | } | |
1045 | ||
4e478098 AG |
1046 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1047 | { | |
1048 | return ipvs->sysctl_ignore_tunneled; | |
1049 | } | |
1050 | ||
57032948 EB |
1051 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1052 | { | |
1053 | return ipvs->sysctl_cache_bypass; | |
1054 | } | |
1055 | ||
59e0350e SH |
1056 | #else |
1057 | ||
1058 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1059 | { | |
1060 | return DEFAULT_SYNC_THRESHOLD; | |
1061 | } | |
1062 | ||
1063 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1064 | { | |
1065 | return DEFAULT_SYNC_PERIOD; | |
1066 | } | |
1067 | ||
749c42b6 JA |
1068 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
1069 | { | |
1070 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1071 | } | |
1072 | ||
1073 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1074 | { | |
1075 | return DEFAULT_SYNC_RETRIES & 3; | |
1076 | } | |
1077 | ||
7532e8d4 SH |
1078 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1079 | { | |
1080 | return DEFAULT_SYNC_VER; | |
1081 | } | |
1082 | ||
c6c96c18 AF |
1083 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1084 | { | |
1085 | return DEFAULT_SLOPPY_TCP; | |
1086 | } | |
1087 | ||
1088 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1089 | { | |
1090 | return DEFAULT_SLOPPY_SCTP; | |
1091 | } | |
1092 | ||
f73181c8 PNA |
1093 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1094 | { | |
1095 | return 1; | |
1096 | } | |
1097 | ||
4d0c875d JA |
1098 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1099 | { | |
1100 | return 0; | |
1101 | } | |
1102 | ||
07995674 | 1103 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1104 | { |
1105 | return IPVS_SYNC_QLEN_MAX; | |
1106 | } | |
1107 | ||
1108 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1109 | { | |
1110 | return 0; | |
1111 | } | |
1112 | ||
3654e611 JA |
1113 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1114 | { | |
1115 | return 1; | |
1116 | } | |
1117 | ||
0c12582f JA |
1118 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1119 | { | |
1120 | return 0; | |
1121 | } | |
1122 | ||
d752c364 MRL |
1123 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1124 | { | |
1125 | return 1; | |
1126 | } | |
1127 | ||
94485fed AG |
1128 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1129 | { | |
1130 | return 0; | |
1131 | } | |
1132 | ||
4e478098 AG |
1133 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1134 | { | |
1135 | return 0; | |
1136 | } | |
1137 | ||
57032948 EB |
1138 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1139 | { | |
1140 | return 0; | |
1141 | } | |
1142 | ||
59e0350e SH |
1143 | #endif |
1144 | ||
07dcc686 SH |
1145 | /* IPVS core functions |
1146 | * (from ip_vs_core.c) | |
1da177e4 | 1147 | */ |
5c3a0fd7 JP |
1148 | const char *ip_vs_proto_name(unsigned int proto); |
1149 | void ip_vs_init_hash_table(struct list_head *table, int rows); | |
afdd6140 | 1150 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 1151 | |
1da177e4 LT |
1152 | #define IP_VS_APP_TYPE_FTP 1 |
1153 | ||
07dcc686 SH |
1154 | /* ip_vs_conn handling functions |
1155 | * (from ip_vs_conn.c) | |
1da177e4 | 1156 | */ |
1da177e4 LT |
1157 | enum { |
1158 | IP_VS_DIR_INPUT = 0, | |
1159 | IP_VS_DIR_OUTPUT, | |
1160 | IP_VS_DIR_INPUT_ONLY, | |
1161 | IP_VS_DIR_LAST, | |
1162 | }; | |
1163 | ||
19913dec | 1164 | static inline void ip_vs_conn_fill_param(struct netns_ipvs *ipvs, int af, int protocol, |
f11017ec SH |
1165 | const union nf_inet_addr *caddr, |
1166 | __be16 cport, | |
1167 | const union nf_inet_addr *vaddr, | |
1168 | __be16 vport, | |
1169 | struct ip_vs_conn_param *p) | |
1170 | { | |
19913dec | 1171 | p->ipvs = ipvs; |
f11017ec SH |
1172 | p->af = af; |
1173 | p->protocol = protocol; | |
1174 | p->caddr = caddr; | |
1175 | p->cport = cport; | |
1176 | p->vaddr = vaddr; | |
1177 | p->vport = vport; | |
85999283 SH |
1178 | p->pe = NULL; |
1179 | p->pe_data = NULL; | |
f11017ec | 1180 | } |
28364a59 | 1181 | |
f11017ec SH |
1182 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
1183 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 1184 | |
ab161976 EB |
1185 | struct ip_vs_conn * ip_vs_conn_in_get_proto(struct netns_ipvs *ipvs, int af, |
1186 | const struct sk_buff *skb, | |
802c41ad | 1187 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1188 | |
f11017ec | 1189 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 1190 | |
0cf705c8 EB |
1191 | struct ip_vs_conn * ip_vs_conn_out_get_proto(struct netns_ipvs *ipvs, int af, |
1192 | const struct sk_buff *skb, | |
802c41ad | 1193 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1194 | |
088339a5 JA |
1195 | /* Get reference to gain full access to conn. |
1196 | * By default, RCU read-side critical sections have access only to | |
1197 | * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference. | |
1198 | */ | |
1199 | static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp) | |
1200 | { | |
1201 | return atomic_inc_not_zero(&cp->refcnt); | |
1202 | } | |
1203 | ||
1da177e4 LT |
1204 | /* put back the conn without restarting its timer */ |
1205 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1206 | { | |
4e857c58 | 1207 | smp_mb__before_atomic(); |
1da177e4 LT |
1208 | atomic_dec(&cp->refcnt); |
1209 | } | |
5c3a0fd7 JP |
1210 | void ip_vs_conn_put(struct ip_vs_conn *cp); |
1211 | void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); | |
1da177e4 | 1212 | |
ba38528a | 1213 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af, |
f11017ec | 1214 | const union nf_inet_addr *daddr, |
95c96174 | 1215 | __be16 dport, unsigned int flags, |
0e051e68 | 1216 | struct ip_vs_dest *dest, __u32 fwmark); |
5c3a0fd7 | 1217 | void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1da177e4 | 1218 | |
5c3a0fd7 | 1219 | const char *ip_vs_state_name(__u16 proto, int state); |
1da177e4 | 1220 | |
69f39093 | 1221 | void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp); |
5c3a0fd7 | 1222 | int ip_vs_check_template(struct ip_vs_conn *ct); |
423b5595 | 1223 | void ip_vs_random_dropentry(struct netns_ipvs *ipvs); |
5c3a0fd7 JP |
1224 | int ip_vs_conn_init(void); |
1225 | void ip_vs_conn_cleanup(void); | |
1da177e4 LT |
1226 | |
1227 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1228 | { | |
1229 | struct ip_vs_conn *ctl_cp = cp->control; | |
1230 | if (!ctl_cp) { | |
cfc78c5a JV |
1231 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
1232 | "%s:%d to %s:%d\n", | |
1233 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1234 | ntohs(cp->cport), | |
1235 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1236 | ntohs(cp->vport)); | |
1237 | ||
1da177e4 LT |
1238 | return; |
1239 | } | |
1240 | ||
cfc78c5a JV |
1241 | IP_VS_DBG_BUF(7, "DELeting control for: " |
1242 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1243 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1244 | ntohs(cp->cport), | |
1245 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1246 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1247 | |
1248 | cp->control = NULL; | |
1249 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1250 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1251 | "%s:%d to %s:%d\n", | |
1252 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1253 | ntohs(cp->cport), | |
1254 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1255 | ntohs(cp->vport)); | |
1256 | ||
1da177e4 LT |
1257 | return; |
1258 | } | |
1259 | atomic_dec(&ctl_cp->n_control); | |
1260 | } | |
1261 | ||
1262 | static inline void | |
1263 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1264 | { | |
1265 | if (cp->control) { | |
cfc78c5a JV |
1266 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
1267 | "%s:%d to %s:%d\n", | |
1268 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1269 | ntohs(cp->cport), | |
1270 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1271 | ntohs(cp->vport)); | |
1272 | ||
1da177e4 LT |
1273 | ip_vs_control_del(cp); |
1274 | } | |
1275 | ||
cfc78c5a JV |
1276 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1277 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1278 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1279 | ntohs(cp->cport), | |
1280 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1281 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1282 | |
1283 | cp->control = ctl_cp; | |
1284 | atomic_inc(&ctl_cp->n_control); | |
1285 | } | |
1286 | ||
07dcc686 | 1287 | /* IPVS netns init & cleanup functions */ |
a4dd0360 | 1288 | int ip_vs_estimator_net_init(struct netns_ipvs *ipvs); |
3d993766 | 1289 | int ip_vs_control_net_init(struct netns_ipvs *ipvs); |
7d1f88ec | 1290 | int ip_vs_protocol_net_init(struct netns_ipvs *ipvs); |
b5dd212c | 1291 | int ip_vs_app_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1292 | int ip_vs_conn_net_init(struct netns_ipvs *ipvs); |
802cb437 | 1293 | int ip_vs_sync_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1294 | void ip_vs_conn_net_cleanup(struct netns_ipvs *ipvs); |
b5dd212c | 1295 | void ip_vs_app_net_cleanup(struct netns_ipvs *ipvs); |
7d1f88ec | 1296 | void ip_vs_protocol_net_cleanup(struct netns_ipvs *ipvs); |
3d993766 | 1297 | void ip_vs_control_net_cleanup(struct netns_ipvs *ipvs); |
a4dd0360 | 1298 | void ip_vs_estimator_net_cleanup(struct netns_ipvs *ipvs); |
ebea1f7c | 1299 | void ip_vs_sync_net_cleanup(struct netns_ipvs *ipvs); |
56d2169b | 1300 | void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs); |
1da177e4 | 1301 | |
07dcc686 SH |
1302 | /* IPVS application functions |
1303 | * (from ip_vs_app.c) | |
1da177e4 LT |
1304 | */ |
1305 | #define IP_VS_APP_MAX_PORTS 8 | |
9f8128a5 EB |
1306 | struct ip_vs_app *register_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); |
1307 | void unregister_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); | |
5c3a0fd7 JP |
1308 | int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
1309 | void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
3250dc9c | 1310 | int register_ip_vs_app_inc(struct netns_ipvs *ipvs, struct ip_vs_app *app, __u16 proto, |
5c3a0fd7 JP |
1311 | __u16 port); |
1312 | int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
1313 | void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1314 | ||
1315 | int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); | |
1316 | int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
1da177e4 | 1317 | |
8be67a66 SH |
1318 | int register_ip_vs_pe(struct ip_vs_pe *pe); |
1319 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1320 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1321 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 | 1322 | |
07dcc686 | 1323 | /* Use a #define to avoid all of module.h just for these trivial ops */ |
69e7dae4 PG |
1324 | #define ip_vs_pe_get(pe) \ |
1325 | if (pe && pe->module) \ | |
e9e5eee8 | 1326 | __module_get(pe->module); |
e9e5eee8 | 1327 | |
69e7dae4 PG |
1328 | #define ip_vs_pe_put(pe) \ |
1329 | if (pe && pe->module) \ | |
e9e5eee8 | 1330 | module_put(pe->module); |
1da177e4 | 1331 | |
07dcc686 | 1332 | /* IPVS protocol functions (from ip_vs_proto.c) */ |
5c3a0fd7 JP |
1333 | int ip_vs_protocol_init(void); |
1334 | void ip_vs_protocol_cleanup(void); | |
1335 | void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); | |
1336 | int *ip_vs_create_timeout_table(int *table, int size); | |
1337 | int ip_vs_set_state_timeout(int *table, int num, const char *const *names, | |
1338 | const char *name, int to); | |
1339 | void ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, | |
1340 | const struct sk_buff *skb, int offset, | |
1341 | const char *msg); | |
1da177e4 LT |
1342 | |
1343 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1344 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1345 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1346 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1347 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1348 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 | 1349 | |
07dcc686 SH |
1350 | /* Registering/unregistering scheduler functions |
1351 | * (from ip_vs_sched.c) | |
1da177e4 | 1352 | */ |
5c3a0fd7 JP |
1353 | int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
1354 | int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1355 | int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1356 | struct ip_vs_scheduler *scheduler); | |
1357 | void ip_vs_unbind_scheduler(struct ip_vs_service *svc, | |
1358 | struct ip_vs_scheduler *sched); | |
1359 | struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1360 | void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1361 | struct ip_vs_conn * | |
190ecd27 | 1362 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
d4383f04 JDB |
1363 | struct ip_vs_proto_data *pd, int *ignored, |
1364 | struct ip_vs_iphdr *iph); | |
5c3a0fd7 JP |
1365 | int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
1366 | struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); | |
1da177e4 | 1367 | |
5c3a0fd7 | 1368 | void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
41ac51ee | 1369 | |
07dcc686 | 1370 | /* IPVS control data and functions (from ip_vs_ctl.c) */ |
1da177e4 | 1371 | extern struct ip_vs_stats ip_vs_stats; |
b880c1f0 | 1372 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 | 1373 | |
5c3a0fd7 | 1374 | struct ip_vs_service * |
0a4fd6ce | 1375 | ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1376 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 | 1377 | |
48aed1b0 | 1378 | bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, |
5c3a0fd7 JP |
1379 | const union nf_inet_addr *daddr, __be16 dport); |
1380 | ||
1381 | int ip_vs_use_count_inc(void); | |
1382 | void ip_vs_use_count_dec(void); | |
1383 | int ip_vs_register_nl_ioctl(void); | |
1384 | void ip_vs_unregister_nl_ioctl(void); | |
1385 | int ip_vs_control_init(void); | |
1386 | void ip_vs_control_cleanup(void); | |
1387 | struct ip_vs_dest * | |
dc2add6f | 1388 | ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af, |
655eef10 AG |
1389 | const union nf_inet_addr *daddr, __be16 dport, |
1390 | const union nf_inet_addr *vaddr, __be16 vport, | |
52793dbe | 1391 | __u16 protocol, __u32 fwmark, __u32 flags); |
5c3a0fd7 | 1392 | void ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 | 1393 | |
fca9c20a JA |
1394 | static inline void ip_vs_dest_hold(struct ip_vs_dest *dest) |
1395 | { | |
1396 | atomic_inc(&dest->refcnt); | |
1397 | } | |
1398 | ||
1399 | static inline void ip_vs_dest_put(struct ip_vs_dest *dest) | |
1400 | { | |
4e857c58 | 1401 | smp_mb__before_atomic(); |
fca9c20a JA |
1402 | atomic_dec(&dest->refcnt); |
1403 | } | |
1da177e4 | 1404 | |
9e4e948a JA |
1405 | static inline void ip_vs_dest_put_and_free(struct ip_vs_dest *dest) |
1406 | { | |
1407 | if (atomic_dec_return(&dest->refcnt) < 0) | |
1408 | kfree(dest); | |
1409 | } | |
1410 | ||
07dcc686 SH |
1411 | /* IPVS sync daemon data and function prototypes |
1412 | * (from ip_vs_sync.c) | |
1da177e4 | 1413 | */ |
6ac121d7 | 1414 | int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *cfg, |
e4ff6751 | 1415 | int state); |
b3cf3cbf | 1416 | int stop_sync_thread(struct netns_ipvs *ipvs, int state); |
b61a8c1a | 1417 | void ip_vs_sync_conn(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, int pkts); |
1da177e4 | 1418 | |
07dcc686 | 1419 | /* IPVS rate estimator prototypes (from ip_vs_est.c) */ |
0f34d54b EB |
1420 | void ip_vs_start_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); |
1421 | void ip_vs_stop_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); | |
5c3a0fd7 | 1422 | void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
cd67cd5e | 1423 | void ip_vs_read_estimator(struct ip_vs_kstats *dst, struct ip_vs_stats *stats); |
1da177e4 | 1424 | |
07dcc686 | 1425 | /* Various IPVS packet transmitters (from ip_vs_xmit.c) */ |
5c3a0fd7 JP |
1426 | int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
1427 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1428 | int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1429 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1430 | int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1431 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1432 | int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1433 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1434 | int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1435 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1436 | int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1437 | struct ip_vs_protocol *pp, int offset, | |
1438 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
1439 | void ip_vs_dest_dst_rcu_free(struct rcu_head *head); | |
1da177e4 | 1440 | |
b3cdd2a7 | 1441 | #ifdef CONFIG_IP_VS_IPV6 |
5c3a0fd7 JP |
1442 | int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
1443 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1444 | int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1445 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1446 | int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1447 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1448 | int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1449 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1450 | int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1451 | struct ip_vs_protocol *pp, int offset, | |
1452 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
b3cdd2a7 | 1453 | #endif |
1da177e4 | 1454 | |
3a1bbf18 | 1455 | #ifdef CONFIG_SYSCTL |
07dcc686 SH |
1456 | /* This is a simple mechanism to ignore packets when |
1457 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1458 | * we start to drop 1/rate of the packets | |
1da177e4 | 1459 | */ |
a0840e2e | 1460 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1461 | { |
a0840e2e HS |
1462 | if (!ipvs->drop_rate) |
1463 | return 0; | |
1464 | if (--ipvs->drop_counter > 0) | |
1465 | return 0; | |
1466 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1467 | return 1; |
1468 | } | |
3a1bbf18 SH |
1469 | #else |
1470 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1471 | #endif | |
1da177e4 | 1472 | |
07dcc686 | 1473 | /* ip_vs_fwd_tag returns the forwarding tag of the connection */ |
1da177e4 LT |
1474 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) |
1475 | ||
732db659 | 1476 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1477 | { |
1478 | char fwd; | |
1479 | ||
1480 | switch (IP_VS_FWD_METHOD(cp)) { | |
1481 | case IP_VS_CONN_F_MASQ: | |
1482 | fwd = 'M'; break; | |
1483 | case IP_VS_CONN_F_LOCALNODE: | |
1484 | fwd = 'L'; break; | |
1485 | case IP_VS_CONN_F_TUNNEL: | |
1486 | fwd = 'T'; break; | |
1487 | case IP_VS_CONN_F_DROUTE: | |
1488 | fwd = 'R'; break; | |
1489 | case IP_VS_CONN_F_BYPASS: | |
1490 | fwd = 'B'; break; | |
1491 | default: | |
1492 | fwd = '?'; break; | |
1493 | } | |
1494 | return fwd; | |
1495 | } | |
1496 | ||
5c3a0fd7 JP |
1497 | void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1498 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 JV |
1499 | |
1500 | #ifdef CONFIG_IP_VS_IPV6 | |
5c3a0fd7 JP |
1501 | void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1502 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 | 1503 | #endif |
1da177e4 | 1504 | |
5c3a0fd7 | 1505 | __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1506 | |
f9214b26 | 1507 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1508 | { |
f9214b26 | 1509 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1510 | |
07f0757a | 1511 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1512 | } |
1513 | ||
0bbdd42b JV |
1514 | #ifdef CONFIG_IP_VS_IPV6 |
1515 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1516 | __wsum oldsum) | |
1517 | { | |
1518 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1519 | new[3], new[2], new[1], new[0] }; | |
1520 | ||
07f0757a | 1521 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1522 | } |
1523 | #endif | |
1524 | ||
f9214b26 AV |
1525 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1526 | { | |
1527 | __be16 diff[2] = { ~old, new }; | |
1528 | ||
07f0757a | 1529 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1530 | } |
1531 | ||
07dcc686 | 1532 | /* Forget current conntrack (unconfirmed) and attach notrack entry */ |
cf356d69 JA |
1533 | static inline void ip_vs_notrack(struct sk_buff *skb) |
1534 | { | |
1535 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1536 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1537 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 JA |
1538 | |
1539 | if (!ct || !nf_ct_is_untracked(ct)) { | |
9e33ce45 | 1540 | nf_conntrack_put(skb->nfct); |
cf356d69 JA |
1541 | skb->nfct = &nf_ct_untracked_get()->ct_general; |
1542 | skb->nfctinfo = IP_CT_NEW; | |
1543 | nf_conntrack_get(skb->nfct); | |
1544 | } | |
1545 | #endif | |
1546 | } | |
1547 | ||
f4bc17cd | 1548 | #ifdef CONFIG_IP_VS_NFCT |
07dcc686 SH |
1549 | /* Netfilter connection tracking |
1550 | * (from ip_vs_nfct.c) | |
f4bc17cd | 1551 | */ |
a0840e2e | 1552 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1553 | { |
a4e2f5a7 | 1554 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1555 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1556 | #else |
1557 | return 0; | |
1558 | #endif | |
f4bc17cd JA |
1559 | } |
1560 | ||
5c3a0fd7 JP |
1561 | void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1562 | int outin); | |
1563 | int ip_vs_confirm_conntrack(struct sk_buff *skb); | |
1564 | void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1565 | struct ip_vs_conn *cp, u_int8_t proto, | |
1566 | const __be16 port, int from_rs); | |
1567 | void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
f4bc17cd JA |
1568 | |
1569 | #else | |
1570 | ||
a0840e2e | 1571 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1572 | { |
1573 | return 0; | |
1574 | } | |
1575 | ||
1576 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1577 | struct ip_vs_conn *cp, int outin) | |
1578 | { | |
1579 | } | |
1580 | ||
e23ebf0f | 1581 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
f4bc17cd JA |
1582 | { |
1583 | return NF_ACCEPT; | |
1584 | } | |
1585 | ||
1586 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1587 | { | |
1588 | } | |
07dcc686 | 1589 | #endif /* CONFIG_IP_VS_NFCT */ |
6523ce15 | 1590 | |
f719e375 JA |
1591 | /* Really using conntrack? */ |
1592 | static inline bool ip_vs_conn_uses_conntrack(struct ip_vs_conn *cp, | |
1593 | struct sk_buff *skb) | |
1594 | { | |
1595 | #ifdef CONFIG_IP_VS_NFCT | |
1596 | enum ip_conntrack_info ctinfo; | |
1597 | struct nf_conn *ct; | |
1598 | ||
1599 | if (!(cp->flags & IP_VS_CONN_F_NFCT)) | |
1600 | return false; | |
1601 | ct = nf_ct_get(skb, &ctinfo); | |
1602 | if (ct && !nf_ct_is_untracked(ct)) | |
1603 | return true; | |
1604 | #endif | |
1605 | return false; | |
1606 | } | |
1607 | ||
c16526a7 | 1608 | static inline int |
b552f7e3 CG |
1609 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) |
1610 | { | |
07dcc686 | 1611 | /* We think the overhead of processing active connections is 256 |
b552f7e3 CG |
1612 | * times higher than that of inactive connections in average. (This |
1613 | * 256 times might not be accurate, we will change it later) We | |
1614 | * use the following formula to estimate the overhead now: | |
1615 | * dest->activeconns*256 + dest->inactconns | |
1616 | */ | |
1617 | return (atomic_read(&dest->activeconns) << 8) + | |
1618 | atomic_read(&dest->inactconns); | |
1619 | } | |
1620 | ||
bc4768eb | 1621 | #endif /* _NET_IP_VS_H */ |