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 SH |
40 | |
41 | /* Get net ptr from skb in traffic cases | |
fc723250 HS |
42 | * use skb_sknet when call is from userland (ioctl or netlink) |
43 | */ | |
a0840e2e | 44 | static inline struct net *skb_net(const struct sk_buff *skb) |
fc723250 HS |
45 | { |
46 | #ifdef CONFIG_NET_NS | |
47 | #ifdef CONFIG_IP_VS_DEBUG | |
48 | /* | |
49 | * This is used for debug only. | |
50 | * Start with the most likely hit | |
51 | * End with BUG | |
52 | */ | |
0c5c9fb5 | 53 | if (likely(skb->dev && dev_net(skb->dev))) |
fc723250 | 54 | return dev_net(skb->dev); |
a09d1977 | 55 | if (skb_dst(skb) && skb_dst(skb)->dev) |
fc723250 HS |
56 | return dev_net(skb_dst(skb)->dev); |
57 | WARN(skb->sk, "Maybe skb_sknet should be used in %s() at line:%d\n", | |
58 | __func__, __LINE__); | |
0c5c9fb5 | 59 | if (likely(skb->sk && sock_net(skb->sk))) |
fc723250 HS |
60 | return sock_net(skb->sk); |
61 | pr_err("There is no net ptr to find in the skb in %s() line:%d\n", | |
62 | __func__, __LINE__); | |
63 | BUG(); | |
64 | #else | |
65 | return dev_net(skb->dev ? : skb_dst(skb)->dev); | |
66 | #endif | |
67 | #else | |
68 | return &init_net; | |
69 | #endif | |
70 | } | |
71 | ||
a0840e2e | 72 | static inline struct net *skb_sknet(const struct sk_buff *skb) |
fc723250 HS |
73 | { |
74 | #ifdef CONFIG_NET_NS | |
75 | #ifdef CONFIG_IP_VS_DEBUG | |
76 | /* Start with the most likely hit */ | |
0c5c9fb5 | 77 | if (likely(skb->sk && sock_net(skb->sk))) |
fc723250 HS |
78 | return sock_net(skb->sk); |
79 | WARN(skb->dev, "Maybe skb_net should be used instead in %s() line:%d\n", | |
80 | __func__, __LINE__); | |
0c5c9fb5 | 81 | if (likely(skb->dev && dev_net(skb->dev))) |
fc723250 HS |
82 | return dev_net(skb->dev); |
83 | pr_err("There is no net ptr to find in the skb in %s() line:%d\n", | |
84 | __func__, __LINE__); | |
85 | BUG(); | |
86 | #else | |
87 | return sock_net(skb->sk); | |
88 | #endif | |
89 | #else | |
90 | return &init_net; | |
91 | #endif | |
92 | } | |
07dcc686 SH |
93 | |
94 | /* This one needed for single_open_net since net is stored directly in | |
25985edc | 95 | * private not as a struct i.e. seq_file_net can't be used. |
b17fc996 HS |
96 | */ |
97 | static inline struct net *seq_file_single_net(struct seq_file *seq) | |
98 | { | |
99 | #ifdef CONFIG_NET_NS | |
100 | return (struct net *)seq->private; | |
101 | #else | |
102 | return &init_net; | |
103 | #endif | |
104 | } | |
6f7edb48 CB |
105 | |
106 | /* Connections' size value needed by ip_vs_ctl.c */ | |
107 | extern int ip_vs_conn_tab_size; | |
108 | ||
64aae3cb | 109 | struct ip_vs_iphdr { |
4fd9beef | 110 | int hdr_flags; /* ipvs flags */ |
b0e010c5 | 111 | __u32 off; /* Where IP or IPv4 header starts */ |
63dca2c0 | 112 | __u32 len; /* IPv4 simply where L4 starts |
07dcc686 | 113 | * IPv6 where L4 Transport Header starts */ |
63dca2c0 JDB |
114 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ |
115 | __s16 protocol; | |
116 | __s32 flags; | |
64aae3cb JV |
117 | union nf_inet_addr saddr; |
118 | union nf_inet_addr daddr; | |
119 | }; | |
120 | ||
2f74713d JDB |
121 | static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, |
122 | int len, void *buffer, | |
123 | const struct ip_vs_iphdr *ipvsh) | |
124 | { | |
125 | return skb_header_pointer(skb, offset, len, buffer); | |
126 | } | |
2f74713d | 127 | |
63dca2c0 JDB |
128 | /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. |
129 | * IPv6 requires some extra work, as finding proper header position, | |
130 | * depend on the IPv6 extension headers. | |
131 | */ | |
b0e010c5 AG |
132 | static inline int |
133 | ip_vs_fill_iph_skb_off(int af, const struct sk_buff *skb, int offset, | |
4fd9beef | 134 | int hdr_flags, struct ip_vs_iphdr *iphdr) |
64aae3cb | 135 | { |
4fd9beef | 136 | iphdr->hdr_flags = hdr_flags; |
b0e010c5 | 137 | iphdr->off = offset; |
4fd9beef | 138 | |
64aae3cb JV |
139 | #ifdef CONFIG_IP_VS_IPV6 |
140 | if (af == AF_INET6) { | |
b0e010c5 AG |
141 | struct ipv6hdr _iph; |
142 | const struct ipv6hdr *iph = skb_header_pointer( | |
143 | skb, offset, sizeof(_iph), &_iph); | |
144 | if (!iph) | |
145 | return 0; | |
146 | ||
4e3fd7a0 AD |
147 | iphdr->saddr.in6 = iph->saddr; |
148 | iphdr->daddr.in6 = iph->daddr; | |
6aafeef0 | 149 | /* ipv6_find_hdr() updates len, flags */ |
b0e010c5 | 150 | iphdr->len = offset; |
63dca2c0 JDB |
151 | iphdr->flags = 0; |
152 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
153 | &iphdr->fragoffs, | |
154 | &iphdr->flags); | |
b0e010c5 AG |
155 | if (iphdr->protocol < 0) |
156 | return 0; | |
64aae3cb JV |
157 | } else |
158 | #endif | |
159 | { | |
b0e010c5 AG |
160 | struct iphdr _iph; |
161 | const struct iphdr *iph = skb_header_pointer( | |
162 | skb, offset, sizeof(_iph), &_iph); | |
163 | if (!iph) | |
164 | return 0; | |
165 | ||
166 | iphdr->len = offset + iph->ihl * 4; | |
63dca2c0 JDB |
167 | iphdr->fragoffs = 0; |
168 | iphdr->protocol = iph->protocol; | |
169 | iphdr->saddr.ip = iph->saddr; | |
170 | iphdr->daddr.ip = iph->daddr; | |
171 | } | |
b0e010c5 AG |
172 | |
173 | return 1; | |
174 | } | |
175 | ||
176 | static inline int | |
4fd9beef AG |
177 | ip_vs_fill_iph_skb_icmp(int af, const struct sk_buff *skb, int offset, |
178 | bool inverse, struct ip_vs_iphdr *iphdr) | |
179 | { | |
180 | int hdr_flags = IP_VS_HDR_ICMP; | |
181 | ||
182 | if (inverse) | |
183 | hdr_flags |= IP_VS_HDR_INVERSE; | |
184 | ||
185 | return ip_vs_fill_iph_skb_off(af, skb, offset, hdr_flags, iphdr); | |
186 | } | |
187 | ||
188 | static inline int | |
189 | ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, bool inverse, | |
190 | struct ip_vs_iphdr *iphdr) | |
191 | { | |
192 | int hdr_flags = 0; | |
193 | ||
194 | if (inverse) | |
195 | hdr_flags |= IP_VS_HDR_INVERSE; | |
196 | ||
197 | return ip_vs_fill_iph_skb_off(af, skb, skb_network_offset(skb), | |
198 | hdr_flags, iphdr); | |
199 | } | |
200 | ||
201 | static inline bool | |
202 | ip_vs_iph_inverse(const struct ip_vs_iphdr *iph) | |
203 | { | |
204 | return !!(iph->hdr_flags & IP_VS_HDR_INVERSE); | |
205 | } | |
206 | ||
207 | static inline bool | |
208 | ip_vs_iph_icmp(const struct ip_vs_iphdr *iph) | |
b0e010c5 | 209 | { |
4fd9beef | 210 | return !!(iph->hdr_flags & IP_VS_HDR_ICMP); |
63dca2c0 JDB |
211 | } |
212 | ||
64aae3cb JV |
213 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, |
214 | const union nf_inet_addr *src) | |
215 | { | |
216 | #ifdef CONFIG_IP_VS_IPV6 | |
217 | if (af == AF_INET6) | |
4e3fd7a0 | 218 | dst->in6 = src->in6; |
64aae3cb JV |
219 | else |
220 | #endif | |
221 | dst->ip = src->ip; | |
222 | } | |
223 | ||
9a05475c JA |
224 | static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst, |
225 | const union nf_inet_addr *src) | |
226 | { | |
227 | #ifdef CONFIG_IP_VS_IPV6 | |
228 | if (af == AF_INET6) { | |
229 | dst->in6 = src->in6; | |
230 | return; | |
231 | } | |
232 | #endif | |
233 | dst->ip = src->ip; | |
234 | dst->all[1] = 0; | |
235 | dst->all[2] = 0; | |
236 | dst->all[3] = 0; | |
237 | } | |
238 | ||
64aae3cb JV |
239 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, |
240 | const union nf_inet_addr *b) | |
241 | { | |
242 | #ifdef CONFIG_IP_VS_IPV6 | |
243 | if (af == AF_INET6) | |
244 | return ipv6_addr_equal(&a->in6, &b->in6); | |
245 | #endif | |
246 | return a->ip == b->ip; | |
247 | } | |
248 | ||
1da177e4 | 249 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
250 | #include <linux/net.h> |
251 | ||
5c3a0fd7 | 252 | int ip_vs_get_debug_level(void); |
c842a3ad JV |
253 | |
254 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
255 | const union nf_inet_addr *addr, | |
256 | int *idx) | |
257 | { | |
258 | int len; | |
259 | #ifdef CONFIG_IP_VS_IPV6 | |
260 | if (af == AF_INET6) | |
120b9c14 | 261 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
0c6ce78a | 262 | &addr->in6) + 1; |
c842a3ad JV |
263 | else |
264 | #endif | |
3685f25d HH |
265 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
266 | &addr->ip) + 1; | |
c842a3ad JV |
267 | |
268 | *idx += len; | |
269 | BUG_ON(*idx > buf_len + 1); | |
270 | return &buf[*idx - len]; | |
271 | } | |
272 | ||
9aada7ac HE |
273 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
274 | do { \ | |
275 | char ip_vs_dbg_buf[160]; \ | |
276 | int ip_vs_dbg_idx = 0; \ | |
277 | if (level <= ip_vs_get_debug_level()) \ | |
278 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
279 | } while (0) | |
280 | #define IP_VS_ERR_BUF(msg...) \ | |
281 | do { \ | |
282 | char ip_vs_dbg_buf[160]; \ | |
283 | int ip_vs_dbg_idx = 0; \ | |
284 | pr_err(msg); \ | |
285 | } while (0) | |
c842a3ad JV |
286 | |
287 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
288 | #define IP_VS_DBG_ADDR(af, addr) \ |
289 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
290 | sizeof(ip_vs_dbg_buf), addr, \ | |
291 | &ip_vs_dbg_idx) | |
292 | ||
293 | #define IP_VS_DBG(level, msg, ...) \ | |
294 | do { \ | |
295 | if (level <= ip_vs_get_debug_level()) \ | |
296 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
297 | } while (0) | |
298 | #define IP_VS_DBG_RL(msg, ...) \ | |
299 | do { \ | |
300 | if (net_ratelimit()) \ | |
301 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
302 | } while (0) | |
0d79641a | 303 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
304 | do { \ |
305 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 306 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 307 | } while (0) |
0d79641a | 308 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
309 | do { \ |
310 | if (level <= ip_vs_get_debug_level() && \ | |
311 | net_ratelimit()) \ | |
0d79641a | 312 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 313 | } while (0) |
1da177e4 | 314 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
315 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
316 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
317 | #define IP_VS_DBG(level, msg...) do {} while (0) |
318 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
319 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
320 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
321 | #endif |
322 | ||
323 | #define IP_VS_BUG() BUG() | |
1e3e238e | 324 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
325 | do { \ |
326 | if (net_ratelimit()) \ | |
1e3e238e | 327 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 328 | } while (0) |
1da177e4 LT |
329 | |
330 | #ifdef CONFIG_IP_VS_DEBUG | |
331 | #define EnterFunction(level) \ | |
9aada7ac HE |
332 | do { \ |
333 | if (level <= ip_vs_get_debug_level()) \ | |
334 | printk(KERN_DEBUG \ | |
335 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
336 | __func__, __FILE__, __LINE__); \ | |
337 | } while (0) | |
338 | #define LeaveFunction(level) \ | |
339 | do { \ | |
340 | if (level <= ip_vs_get_debug_level()) \ | |
341 | printk(KERN_DEBUG \ | |
342 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
343 | __func__, __FILE__, __LINE__); \ | |
344 | } while (0) | |
1da177e4 LT |
345 | #else |
346 | #define EnterFunction(level) do {} while (0) | |
347 | #define LeaveFunction(level) do {} while (0) | |
348 | #endif | |
349 | ||
07dcc686 | 350 | /* The port number of FTP service (in network order). */ |
f3a7c66b HH |
351 | #define FTPPORT cpu_to_be16(21) |
352 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 353 | |
07dcc686 | 354 | /* TCP State Values */ |
1da177e4 LT |
355 | enum { |
356 | IP_VS_TCP_S_NONE = 0, | |
357 | IP_VS_TCP_S_ESTABLISHED, | |
358 | IP_VS_TCP_S_SYN_SENT, | |
359 | IP_VS_TCP_S_SYN_RECV, | |
360 | IP_VS_TCP_S_FIN_WAIT, | |
361 | IP_VS_TCP_S_TIME_WAIT, | |
362 | IP_VS_TCP_S_CLOSE, | |
363 | IP_VS_TCP_S_CLOSE_WAIT, | |
364 | IP_VS_TCP_S_LAST_ACK, | |
365 | IP_VS_TCP_S_LISTEN, | |
366 | IP_VS_TCP_S_SYNACK, | |
367 | IP_VS_TCP_S_LAST | |
368 | }; | |
369 | ||
07dcc686 | 370 | /* UDP State Values */ |
1da177e4 LT |
371 | enum { |
372 | IP_VS_UDP_S_NORMAL, | |
373 | IP_VS_UDP_S_LAST, | |
374 | }; | |
375 | ||
07dcc686 | 376 | /* ICMP State Values */ |
1da177e4 LT |
377 | enum { |
378 | IP_VS_ICMP_S_NORMAL, | |
379 | IP_VS_ICMP_S_LAST, | |
380 | }; | |
381 | ||
07dcc686 | 382 | /* SCTP State Values */ |
2906f66a VMR |
383 | enum ip_vs_sctp_states { |
384 | IP_VS_SCTP_S_NONE, | |
61e7c420 JA |
385 | IP_VS_SCTP_S_INIT1, |
386 | IP_VS_SCTP_S_INIT, | |
387 | IP_VS_SCTP_S_COOKIE_SENT, | |
388 | IP_VS_SCTP_S_COOKIE_REPLIED, | |
389 | IP_VS_SCTP_S_COOKIE_WAIT, | |
390 | IP_VS_SCTP_S_COOKIE, | |
391 | IP_VS_SCTP_S_COOKIE_ECHOED, | |
2906f66a | 392 | IP_VS_SCTP_S_ESTABLISHED, |
61e7c420 JA |
393 | IP_VS_SCTP_S_SHUTDOWN_SENT, |
394 | IP_VS_SCTP_S_SHUTDOWN_RECEIVED, | |
395 | IP_VS_SCTP_S_SHUTDOWN_ACK_SENT, | |
396 | IP_VS_SCTP_S_REJECTED, | |
2906f66a VMR |
397 | IP_VS_SCTP_S_CLOSED, |
398 | IP_VS_SCTP_S_LAST | |
399 | }; | |
400 | ||
07dcc686 SH |
401 | /* Delta sequence info structure |
402 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
403 | * Only used in the VS/NAT. | |
1da177e4 LT |
404 | */ |
405 | struct ip_vs_seq { | |
406 | __u32 init_seq; /* Add delta from this seq */ | |
407 | __u32 delta; /* Delta in sequence numbers */ | |
408 | __u32 previous_delta; /* Delta in sequence numbers | |
07dcc686 | 409 | * before last resized pkt */ |
1da177e4 LT |
410 | }; |
411 | ||
07dcc686 | 412 | /* counters per cpu */ |
b17fc996 | 413 | struct ip_vs_counters { |
cd67cd5e JA |
414 | __u64 conns; /* connections scheduled */ |
415 | __u64 inpkts; /* incoming packets */ | |
416 | __u64 outpkts; /* outgoing packets */ | |
b17fc996 HS |
417 | __u64 inbytes; /* incoming bytes */ |
418 | __u64 outbytes; /* outgoing bytes */ | |
419 | }; | |
07dcc686 | 420 | /* Stats per cpu */ |
b17fc996 | 421 | struct ip_vs_cpu_stats { |
cd67cd5e | 422 | struct ip_vs_counters cnt; |
b17fc996 HS |
423 | struct u64_stats_sync syncp; |
424 | }; | |
1da177e4 | 425 | |
07dcc686 | 426 | /* IPVS statistics objects */ |
3a14a313 SW |
427 | struct ip_vs_estimator { |
428 | struct list_head list; | |
429 | ||
430 | u64 last_inbytes; | |
431 | u64 last_outbytes; | |
cd67cd5e JA |
432 | u64 last_conns; |
433 | u64 last_inpkts; | |
434 | u64 last_outpkts; | |
435 | ||
436 | u64 cps; | |
437 | u64 inpps; | |
438 | u64 outpps; | |
439 | u64 inbps; | |
440 | u64 outbps; | |
441 | }; | |
442 | ||
443 | /* | |
444 | * IPVS statistics object, 64-bit kernel version of struct ip_vs_stats_user | |
445 | */ | |
446 | struct ip_vs_kstats { | |
447 | u64 conns; /* connections scheduled */ | |
448 | u64 inpkts; /* incoming packets */ | |
449 | u64 outpkts; /* outgoing packets */ | |
450 | u64 inbytes; /* incoming bytes */ | |
451 | u64 outbytes; /* outgoing bytes */ | |
452 | ||
453 | u64 cps; /* current connection rate */ | |
454 | u64 inpps; /* current in packet rate */ | |
455 | u64 outpps; /* current out packet rate */ | |
456 | u64 inbps; /* current in byte rate */ | |
457 | u64 outbps; /* current out byte rate */ | |
3a14a313 SW |
458 | }; |
459 | ||
fd2c3ef7 | 460 | struct ip_vs_stats { |
cd67cd5e | 461 | struct ip_vs_kstats kstats; /* kernel statistics */ |
e9c0ce23 | 462 | struct ip_vs_estimator est; /* estimator */ |
b962abdc | 463 | struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ |
b17fc996 | 464 | spinlock_t lock; /* spin lock */ |
cd67cd5e | 465 | struct ip_vs_kstats kstats0; /* reset values */ |
1da177e4 LT |
466 | }; |
467 | ||
14c85021 ACM |
468 | struct dst_entry; |
469 | struct iphdr; | |
1da177e4 LT |
470 | struct ip_vs_conn; |
471 | struct ip_vs_app; | |
14c85021 | 472 | struct sk_buff; |
252c6410 | 473 | struct ip_vs_proto_data; |
1da177e4 LT |
474 | |
475 | struct ip_vs_protocol { | |
476 | struct ip_vs_protocol *next; | |
477 | char *name; | |
2ad17def JA |
478 | u16 protocol; |
479 | u16 num_states; | |
1da177e4 | 480 | int dont_defrag; |
1da177e4 LT |
481 | |
482 | void (*init)(struct ip_vs_protocol *pp); | |
483 | ||
484 | void (*exit)(struct ip_vs_protocol *pp); | |
485 | ||
1281a9c2 | 486 | int (*init_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 487 | |
1281a9c2 | 488 | void (*exit_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 489 | |
51ef348b | 490 | int (*conn_schedule)(int af, struct sk_buff *skb, |
9330419d | 491 | struct ip_vs_proto_data *pd, |
d4383f04 JDB |
492 | int *verdict, struct ip_vs_conn **cpp, |
493 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
494 | |
495 | struct ip_vs_conn * | |
51ef348b JV |
496 | (*conn_in_get)(int af, |
497 | const struct sk_buff *skb, | |
802c41ad | 498 | const struct ip_vs_iphdr *iph); |
1da177e4 LT |
499 | |
500 | struct ip_vs_conn * | |
51ef348b JV |
501 | (*conn_out_get)(int af, |
502 | const struct sk_buff *skb, | |
802c41ad | 503 | const struct ip_vs_iphdr *iph); |
1da177e4 | 504 | |
d4383f04 JDB |
505 | int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
506 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 507 | |
d4383f04 JDB |
508 | int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
509 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 510 | |
51ef348b JV |
511 | int (*csum_check)(int af, struct sk_buff *skb, |
512 | struct ip_vs_protocol *pp); | |
1da177e4 LT |
513 | |
514 | const char *(*state_name)(int state); | |
515 | ||
4a516f11 SH |
516 | void (*state_transition)(struct ip_vs_conn *cp, int direction, |
517 | const struct sk_buff *skb, | |
518 | struct ip_vs_proto_data *pd); | |
1da177e4 | 519 | |
19648918 | 520 | int (*register_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 | 521 | |
19648918 | 522 | void (*unregister_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 LT |
523 | |
524 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
525 | ||
0d79641a | 526 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
527 | const struct sk_buff *skb, |
528 | int offset, | |
529 | const char *msg); | |
530 | ||
9330419d | 531 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
1da177e4 LT |
532 | }; |
533 | ||
07dcc686 | 534 | /* protocol data per netns */ |
252c6410 HS |
535 | struct ip_vs_proto_data { |
536 | struct ip_vs_proto_data *next; | |
537 | struct ip_vs_protocol *pp; | |
538 | int *timeout_table; /* protocol timeout table */ | |
539 | atomic_t appcnt; /* counter of proto app incs. */ | |
540 | struct tcp_states_t *tcp_state_table; | |
541 | }; | |
542 | ||
5c3a0fd7 | 543 | struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); |
18d6ade6 | 544 | struct ip_vs_proto_data *ip_vs_proto_data_get(struct netns_ipvs *ipvs, |
5c3a0fd7 | 545 | unsigned short proto); |
1da177e4 | 546 | |
f11017ec | 547 | struct ip_vs_conn_param { |
e64e2b46 | 548 | struct netns_ipvs *ipvs; |
f11017ec SH |
549 | const union nf_inet_addr *caddr; |
550 | const union nf_inet_addr *vaddr; | |
551 | __be16 cport; | |
552 | __be16 vport; | |
553 | __u16 protocol; | |
554 | u16 af; | |
85999283 SH |
555 | |
556 | const struct ip_vs_pe *pe; | |
557 | char *pe_data; | |
558 | __u8 pe_data_len; | |
f11017ec SH |
559 | }; |
560 | ||
07dcc686 | 561 | /* IP_VS structure allocated for each dynamically scheduled connection */ |
1da177e4 | 562 | struct ip_vs_conn { |
731109e7 | 563 | struct hlist_node c_list; /* hashed list heads */ |
1da177e4 | 564 | /* Protocol, addresses and port numbers */ |
6e67e586 | 565 | __be16 cport; |
6e67e586 | 566 | __be16 dport; |
1845ed0b JA |
567 | __be16 vport; |
568 | u16 af; /* address family */ | |
6e67e586 HS |
569 | union nf_inet_addr caddr; /* client address */ |
570 | union nf_inet_addr vaddr; /* virtual address */ | |
571 | union nf_inet_addr daddr; /* destination address */ | |
572 | volatile __u32 flags; /* status flags */ | |
1da177e4 | 573 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
ba38528a | 574 | __u16 daf; /* Address family of the dest */ |
58dbc6f2 | 575 | struct netns_ipvs *ipvs; |
1da177e4 LT |
576 | |
577 | /* counter and timer */ | |
578 | atomic_t refcnt; /* reference count */ | |
579 | struct timer_list timer; /* Expiration timer */ | |
580 | volatile unsigned long timeout; /* timeout */ | |
581 | ||
582 | /* Flags and state transition */ | |
583 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 584 | volatile __u16 state; /* state info */ |
efac5276 RB |
585 | volatile __u16 old_state; /* old state, to be used for |
586 | * state transition triggerd | |
587 | * synchronization | |
588 | */ | |
1845ed0b | 589 | __u32 fwmark; /* Fire wall mark from skb */ |
749c42b6 | 590 | unsigned long sync_endtime; /* jiffies + sent_retries */ |
1da177e4 LT |
591 | |
592 | /* Control members */ | |
593 | struct ip_vs_conn *control; /* Master control connection */ | |
594 | atomic_t n_control; /* Number of controlled ones */ | |
595 | struct ip_vs_dest *dest; /* real server */ | |
596 | atomic_t in_pkts; /* incoming packet counter */ | |
597 | ||
07dcc686 SH |
598 | /* Packet transmitter for different forwarding methods. If it |
599 | * mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
600 | * otherwise this must be changed to a sk_buff **. | |
601 | * NF_ACCEPT can be returned when destination is local. | |
1da177e4 LT |
602 | */ |
603 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
d4383f04 | 604 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
1da177e4 LT |
605 | |
606 | /* Note: we can group the following members into a structure, | |
07dcc686 SH |
607 | * in order to save more space, and the following members are |
608 | * only used in VS/NAT anyway | |
609 | */ | |
1da177e4 LT |
610 | struct ip_vs_app *app; /* bound ip_vs_app object */ |
611 | void *app_data; /* Application private data */ | |
612 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
613 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
85999283 | 614 | |
e9e5eee8 | 615 | const struct ip_vs_pe *pe; |
85999283 SH |
616 | char *pe_data; |
617 | __u8 pe_data_len; | |
088339a5 JA |
618 | |
619 | struct rcu_head rcu_head; | |
1da177e4 LT |
620 | }; |
621 | ||
07dcc686 SH |
622 | /* Extended internal versions of struct ip_vs_service_user and ip_vs_dest_user |
623 | * for IPv6 support. | |
c860c6b1 | 624 | * |
07dcc686 SH |
625 | * We need these to conveniently pass around service and destination |
626 | * options, but unfortunately, we also need to keep the old definitions to | |
627 | * maintain userspace backwards compatibility for the setsockopt interface. | |
c860c6b1 JV |
628 | */ |
629 | struct ip_vs_service_user_kern { | |
630 | /* virtual service addresses */ | |
631 | u16 af; | |
632 | u16 protocol; | |
633 | union nf_inet_addr addr; /* virtual ip address */ | |
0a925864 | 634 | __be16 port; |
c860c6b1 JV |
635 | u32 fwmark; /* firwall mark of service */ |
636 | ||
637 | /* virtual service options */ | |
638 | char *sched_name; | |
0d1e71b0 | 639 | char *pe_name; |
95c96174 ED |
640 | unsigned int flags; /* virtual service flags */ |
641 | unsigned int timeout; /* persistent timeout in sec */ | |
0a925864 | 642 | __be32 netmask; /* persistent netmask or plen */ |
c860c6b1 JV |
643 | }; |
644 | ||
645 | ||
646 | struct ip_vs_dest_user_kern { | |
647 | /* destination server address */ | |
648 | union nf_inet_addr addr; | |
0a925864 | 649 | __be16 port; |
c860c6b1 JV |
650 | |
651 | /* real server options */ | |
95c96174 | 652 | unsigned int conn_flags; /* connection flags */ |
c860c6b1 JV |
653 | int weight; /* destination weight */ |
654 | ||
655 | /* thresholds for active connections */ | |
656 | u32 u_threshold; /* upper threshold */ | |
657 | u32 l_threshold; /* lower threshold */ | |
6cff339b AG |
658 | |
659 | /* Address family of addr */ | |
660 | u16 af; | |
c860c6b1 JV |
661 | }; |
662 | ||
663 | ||
1da177e4 | 664 | /* |
07dcc686 SH |
665 | * The information about the virtual service offered to the net and the |
666 | * forwarding entries. | |
1da177e4 LT |
667 | */ |
668 | struct ip_vs_service { | |
ceec4c38 JA |
669 | struct hlist_node s_list; /* for normal service table */ |
670 | struct hlist_node f_list; /* for fwmark-based service table */ | |
1da177e4 | 671 | atomic_t refcnt; /* reference counter */ |
1da177e4 | 672 | |
e7ade46a | 673 | u16 af; /* address family */ |
1da177e4 | 674 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 675 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 676 | __be16 port; /* port number for the service */ |
1da177e4 | 677 | __u32 fwmark; /* firewall mark of the service */ |
95c96174 ED |
678 | unsigned int flags; /* service status flags */ |
679 | unsigned int timeout; /* persistent timeout in ticks */ | |
0a925864 | 680 | __be32 netmask; /* grouping granularity, mask/plen */ |
3109d2f2 | 681 | struct netns_ipvs *ipvs; |
1da177e4 LT |
682 | |
683 | struct list_head destinations; /* real server d-linked list */ | |
684 | __u32 num_dests; /* number of servers */ | |
685 | struct ip_vs_stats stats; /* statistics for the service */ | |
1da177e4 LT |
686 | |
687 | /* for scheduling */ | |
ceec4c38 | 688 | struct ip_vs_scheduler __rcu *scheduler; /* bound scheduler object */ |
ba3a3ce1 | 689 | spinlock_t sched_lock; /* lock sched_data */ |
1da177e4 | 690 | void *sched_data; /* scheduler application data */ |
85999283 SH |
691 | |
692 | /* alternate persistence engine */ | |
ceec4c38 JA |
693 | struct ip_vs_pe __rcu *pe; |
694 | ||
695 | struct rcu_head rcu_head; | |
1da177e4 LT |
696 | }; |
697 | ||
026ace06 JA |
698 | /* Information for cached dst */ |
699 | struct ip_vs_dest_dst { | |
700 | struct dst_entry *dst_cache; /* destination cache entry */ | |
701 | u32 dst_cookie; | |
702 | union nf_inet_addr dst_saddr; | |
703 | struct rcu_head rcu_head; | |
704 | }; | |
1da177e4 | 705 | |
07dcc686 SH |
706 | /* The real server destination forwarding entry with ip address, port number, |
707 | * and so on. | |
1da177e4 LT |
708 | */ |
709 | struct ip_vs_dest { | |
710 | struct list_head n_list; /* for the dests in the service */ | |
276472ea | 711 | struct hlist_node d_list; /* for table with all the dests */ |
1da177e4 | 712 | |
e7ade46a | 713 | u16 af; /* address family */ |
014d730d | 714 | __be16 port; /* port number of the server */ |
f2431e6e | 715 | union nf_inet_addr addr; /* IP address of the server */ |
95c96174 | 716 | volatile unsigned int flags; /* dest status flags */ |
1da177e4 LT |
717 | atomic_t conn_flags; /* flags to copy to conn */ |
718 | atomic_t weight; /* server weight */ | |
719 | ||
720 | atomic_t refcnt; /* reference counter */ | |
721 | struct ip_vs_stats stats; /* statistics */ | |
bcbde4c0 | 722 | unsigned long idle_start; /* start time, jiffies */ |
1da177e4 LT |
723 | |
724 | /* connection counters and thresholds */ | |
725 | atomic_t activeconns; /* active connections */ | |
726 | atomic_t inactconns; /* inactive connections */ | |
727 | atomic_t persistconns; /* persistent connections */ | |
728 | __u32 u_threshold; /* upper threshold */ | |
729 | __u32 l_threshold; /* lower threshold */ | |
730 | ||
731 | /* for destination cache */ | |
732 | spinlock_t dst_lock; /* lock of dst_cache */ | |
026ace06 | 733 | struct ip_vs_dest_dst __rcu *dest_dst; /* cached dst info */ |
1da177e4 LT |
734 | |
735 | /* for virtual service */ | |
bcbde4c0 | 736 | struct ip_vs_service __rcu *svc; /* service it belongs to */ |
1da177e4 | 737 | __u16 protocol; /* which protocol (TCP/UDP) */ |
014d730d | 738 | __be16 vport; /* virtual port number */ |
f2431e6e | 739 | union nf_inet_addr vaddr; /* virtual IP address */ |
1da177e4 | 740 | __u32 vfwmark; /* firewall mark of service */ |
276472ea | 741 | |
578bc3ef | 742 | struct list_head t_list; /* in dest_trash */ |
276472ea | 743 | unsigned int in_rs_table:1; /* we are in rs_table */ |
1da177e4 LT |
744 | }; |
745 | ||
07dcc686 | 746 | /* The scheduler object */ |
1da177e4 LT |
747 | struct ip_vs_scheduler { |
748 | struct list_head n_list; /* d-linked list head */ | |
749 | char *name; /* scheduler name */ | |
750 | atomic_t refcnt; /* reference counter */ | |
751 | struct module *module; /* THIS_MODULE/NULL */ | |
752 | ||
753 | /* scheduler initializing service */ | |
754 | int (*init_service)(struct ip_vs_service *svc); | |
755 | /* scheduling service finish */ | |
ed3ffc4e | 756 | void (*done_service)(struct ip_vs_service *svc); |
6b6df466 JA |
757 | /* dest is linked */ |
758 | int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
759 | /* dest is unlinked */ | |
760 | int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
761 | /* dest is updated */ | |
762 | int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
1da177e4 LT |
763 | |
764 | /* selecting a server from the given service */ | |
765 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
bba54de5 JA |
766 | const struct sk_buff *skb, |
767 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
768 | }; |
769 | ||
85999283 SH |
770 | /* The persistence engine object */ |
771 | struct ip_vs_pe { | |
772 | struct list_head n_list; /* d-linked list head */ | |
773 | char *name; /* scheduler name */ | |
774 | atomic_t refcnt; /* reference counter */ | |
775 | struct module *module; /* THIS_MODULE/NULL */ | |
776 | ||
777 | /* get the connection template, if any */ | |
778 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
779 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
780 | struct ip_vs_conn *ct); | |
781 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
782 | bool inverse); | |
a3c918ac | 783 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
85999283 | 784 | }; |
1da177e4 | 785 | |
07dcc686 | 786 | /* The application module object (a.k.a. app incarnation) */ |
fd2c3ef7 | 787 | struct ip_vs_app { |
1da177e4 LT |
788 | struct list_head a_list; /* member in app list */ |
789 | int type; /* IP_VS_APP_TYPE_xxx */ | |
790 | char *name; /* application module name */ | |
791 | __u16 protocol; | |
792 | struct module *module; /* THIS_MODULE/NULL */ | |
793 | struct list_head incs_list; /* list of incarnations */ | |
794 | ||
795 | /* members for application incarnations */ | |
796 | struct list_head p_list; /* member in proto app list */ | |
797 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 798 | __be16 port; /* port number in net order */ |
1da177e4 | 799 | atomic_t usecnt; /* usage counter */ |
363c97d7 | 800 | struct rcu_head rcu_head; |
1da177e4 | 801 | |
07dcc686 | 802 | /* output hook: Process packet in inout direction, diff set for TCP. |
8b27b10f JA |
803 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
804 | * 2=Mangled but checksum was not updated | |
805 | */ | |
1da177e4 | 806 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 807 | struct sk_buff *, int *diff); |
1da177e4 | 808 | |
07dcc686 | 809 | /* input hook: Process packet in outin direction, diff set for TCP. |
8b27b10f JA |
810 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
811 | * 2=Mangled but checksum was not updated | |
812 | */ | |
1da177e4 | 813 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 814 | struct sk_buff *, int *diff); |
1da177e4 LT |
815 | |
816 | /* ip_vs_app initializer */ | |
817 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
818 | ||
819 | /* ip_vs_app finish */ | |
820 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
821 | ||
822 | ||
823 | /* not used now */ | |
824 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
825 | struct ip_vs_protocol *); | |
826 | ||
827 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
828 | ||
829 | int * timeout_table; | |
830 | int * timeouts; | |
831 | int timeouts_size; | |
832 | ||
833 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
834 | int *verdict, struct ip_vs_conn **cpp); | |
835 | ||
836 | struct ip_vs_conn * | |
837 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 838 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
839 | |
840 | struct ip_vs_conn * | |
841 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 842 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
843 | |
844 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
845 | const struct sk_buff *skb, | |
846 | struct ip_vs_app *app); | |
847 | ||
848 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
849 | }; | |
850 | ||
f73181c8 PNA |
851 | struct ipvs_master_sync_state { |
852 | struct list_head sync_queue; | |
853 | struct ip_vs_sync_buff *sync_buff; | |
07995674 | 854 | unsigned long sync_queue_len; |
f73181c8 PNA |
855 | unsigned int sync_queue_delay; |
856 | struct task_struct *master_thread; | |
857 | struct delayed_work master_wakeup_work; | |
858 | struct netns_ipvs *ipvs; | |
859 | }; | |
860 | ||
578bc3ef JA |
861 | /* How much time to keep dests in trash */ |
862 | #define IP_VS_DEST_TRASH_PERIOD (120 * HZ) | |
863 | ||
e4ff6751 | 864 | struct ipvs_sync_daemon_cfg { |
d3328817 | 865 | union nf_inet_addr mcast_group; |
e4ff6751 JA |
866 | int syncid; |
867 | u16 sync_maxlen; | |
d3328817 JA |
868 | u16 mcast_port; |
869 | u8 mcast_af; | |
870 | u8 mcast_ttl; | |
e4ff6751 JA |
871 | /* multicast interface name */ |
872 | char mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
873 | }; | |
874 | ||
2553d064 JA |
875 | /* IPVS in network namespace */ |
876 | struct netns_ipvs { | |
877 | int gen; /* Generation */ | |
7a4f0761 | 878 | int enable; /* enable like nf_hooks do */ |
07dcc686 | 879 | /* Hash table: for real service lookups */ |
2553d064 JA |
880 | #define IP_VS_RTAB_BITS 4 |
881 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
882 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
883 | ||
276472ea | 884 | struct hlist_head rs_table[IP_VS_RTAB_SIZE]; |
2553d064 JA |
885 | /* ip_vs_app */ |
886 | struct list_head app_list; | |
2553d064 JA |
887 | /* ip_vs_proto */ |
888 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
889 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
890 | /* ip_vs_proto_tcp */ | |
891 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
892 | #define TCP_APP_TAB_BITS 4 | |
893 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
894 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
895 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
2553d064 JA |
896 | #endif |
897 | /* ip_vs_proto_udp */ | |
898 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
899 | #define UDP_APP_TAB_BITS 4 | |
900 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
901 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
902 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
2553d064 JA |
903 | #endif |
904 | /* ip_vs_proto_sctp */ | |
905 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
906 | #define SCTP_APP_TAB_BITS 4 | |
907 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
908 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
909 | /* Hash table for SCTP application incarnations */ | |
910 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
2553d064 JA |
911 | #endif |
912 | /* ip_vs_conn */ | |
07dcc686 | 913 | atomic_t conn_count; /* connection counter */ |
2553d064 JA |
914 | |
915 | /* ip_vs_ctl */ | |
2a0751af | 916 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
2553d064 JA |
917 | |
918 | int num_services; /* no of virtual services */ | |
f2247fbd | 919 | |
f2247fbd SH |
920 | /* Trash for destinations */ |
921 | struct list_head dest_trash; | |
578bc3ef JA |
922 | spinlock_t dest_trash_lock; |
923 | struct timer_list dest_trash_timer; /* expiration timer */ | |
f2247fbd SH |
924 | /* Service counters */ |
925 | atomic_t ftpsvc_counter; | |
926 | atomic_t nullsvc_counter; | |
927 | ||
928 | #ifdef CONFIG_SYSCTL | |
2553d064 JA |
929 | /* 1/rate drop and drop-entry variables */ |
930 | struct delayed_work defense_work; /* Work handler */ | |
931 | int drop_rate; | |
932 | int drop_counter; | |
933 | atomic_t dropentry; | |
934 | /* locks in ctl.c */ | |
935 | spinlock_t dropentry_lock; /* drop entry handling */ | |
936 | spinlock_t droppacket_lock; /* drop packet handling */ | |
937 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
938 | |
939 | /* sys-ctl struct */ | |
940 | struct ctl_table_header *sysctl_hdr; | |
941 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
942 | #endif |
943 | ||
2553d064 JA |
944 | /* sysctl variables */ |
945 | int sysctl_amemthresh; | |
946 | int sysctl_am_droprate; | |
947 | int sysctl_drop_entry; | |
948 | int sysctl_drop_packet; | |
949 | int sysctl_secure_tcp; | |
950 | #ifdef CONFIG_IP_VS_NFCT | |
951 | int sysctl_conntrack; | |
952 | #endif | |
953 | int sysctl_snat_reroute; | |
954 | int sysctl_sync_ver; | |
f73181c8 | 955 | int sysctl_sync_ports; |
4d0c875d | 956 | int sysctl_sync_persist_mode; |
07995674 | 957 | unsigned long sysctl_sync_qlen_max; |
1c003b15 | 958 | int sysctl_sync_sock_size; |
2553d064 JA |
959 | int sysctl_cache_bypass; |
960 | int sysctl_expire_nodest_conn; | |
c6c96c18 AF |
961 | int sysctl_sloppy_tcp; |
962 | int sysctl_sloppy_sctp; | |
2553d064 JA |
963 | int sysctl_expire_quiescent_template; |
964 | int sysctl_sync_threshold[2]; | |
749c42b6 JA |
965 | unsigned int sysctl_sync_refresh_period; |
966 | int sysctl_sync_retries; | |
2553d064 | 967 | int sysctl_nat_icmp_send; |
3654e611 | 968 | int sysctl_pmtu_disc; |
0c12582f | 969 | int sysctl_backup_only; |
d752c364 | 970 | int sysctl_conn_reuse_mode; |
94485fed | 971 | int sysctl_schedule_icmp; |
4e478098 | 972 | int sysctl_ignore_tunneled; |
2553d064 JA |
973 | |
974 | /* ip_vs_lblc */ | |
975 | int sysctl_lblc_expiration; | |
976 | struct ctl_table_header *lblc_ctl_header; | |
977 | struct ctl_table *lblc_ctl_table; | |
978 | /* ip_vs_lblcr */ | |
979 | int sysctl_lblcr_expiration; | |
980 | struct ctl_table_header *lblcr_ctl_header; | |
981 | struct ctl_table *lblcr_ctl_table; | |
982 | /* ip_vs_est */ | |
983 | struct list_head est_list; /* estimator list */ | |
984 | spinlock_t est_lock; | |
985 | struct timer_list est_timer; /* Estimation timer */ | |
986 | /* ip_vs_sync */ | |
2553d064 | 987 | spinlock_t sync_lock; |
f73181c8 | 988 | struct ipvs_master_sync_state *ms; |
2553d064 | 989 | spinlock_t sync_buff_lock; |
f73181c8 PNA |
990 | struct task_struct **backup_threads; |
991 | int threads_mask; | |
2553d064 | 992 | volatile int sync_state; |
ae1d48b2 | 993 | struct mutex sync_mutex; |
e4ff6751 JA |
994 | struct ipvs_sync_daemon_cfg mcfg; /* Master Configuration */ |
995 | struct ipvs_sync_daemon_cfg bcfg; /* Backup Configuration */ | |
2553d064 JA |
996 | /* net name space ptr */ |
997 | struct net *net; /* Needed by timer routines */ | |
07dcc686 SH |
998 | /* Number of heterogeneous destinations, needed becaus heterogeneous |
999 | * are not supported when synchronization is enabled. | |
1000 | */ | |
391f503d | 1001 | unsigned int mixed_address_family_dests; |
2553d064 | 1002 | }; |
1da177e4 | 1003 | |
59e0350e SH |
1004 | #define DEFAULT_SYNC_THRESHOLD 3 |
1005 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 1006 | #define DEFAULT_SYNC_VER 1 |
c6c96c18 AF |
1007 | #define DEFAULT_SLOPPY_TCP 0 |
1008 | #define DEFAULT_SLOPPY_SCTP 0 | |
749c42b6 JA |
1009 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
1010 | #define DEFAULT_SYNC_RETRIES 0 | |
1c003b15 PNA |
1011 | #define IPVS_SYNC_WAKEUP_RATE 8 |
1012 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
1013 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
1014 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
749c42b6 | 1015 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
f73181c8 | 1016 | #define IPVS_SYNC_PORTS_MAX (1 << 6) |
59e0350e SH |
1017 | |
1018 | #ifdef CONFIG_SYSCTL | |
1019 | ||
1020 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1021 | { | |
1022 | return ipvs->sysctl_sync_threshold[0]; | |
1023 | } | |
1024 | ||
1025 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1026 | { | |
749c42b6 JA |
1027 | return ACCESS_ONCE(ipvs->sysctl_sync_threshold[1]); |
1028 | } | |
1029 | ||
1030 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
1031 | { | |
1032 | return ACCESS_ONCE(ipvs->sysctl_sync_refresh_period); | |
1033 | } | |
1034 | ||
1035 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1036 | { | |
1037 | return ipvs->sysctl_sync_retries; | |
59e0350e SH |
1038 | } |
1039 | ||
7532e8d4 SH |
1040 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1041 | { | |
1042 | return ipvs->sysctl_sync_ver; | |
1043 | } | |
1044 | ||
c6c96c18 AF |
1045 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1046 | { | |
1047 | return ipvs->sysctl_sloppy_tcp; | |
1048 | } | |
1049 | ||
1050 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1051 | { | |
1052 | return ipvs->sysctl_sloppy_sctp; | |
1053 | } | |
1054 | ||
f73181c8 PNA |
1055 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1056 | { | |
1057 | return ACCESS_ONCE(ipvs->sysctl_sync_ports); | |
1058 | } | |
1059 | ||
4d0c875d JA |
1060 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1061 | { | |
1062 | return ipvs->sysctl_sync_persist_mode; | |
1063 | } | |
1064 | ||
07995674 | 1065 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1066 | { |
1067 | return ipvs->sysctl_sync_qlen_max; | |
1068 | } | |
1069 | ||
1070 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1071 | { | |
1072 | return ipvs->sysctl_sync_sock_size; | |
1073 | } | |
1074 | ||
3654e611 JA |
1075 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1076 | { | |
1077 | return ipvs->sysctl_pmtu_disc; | |
1078 | } | |
1079 | ||
0c12582f JA |
1080 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1081 | { | |
1082 | return ipvs->sync_state & IP_VS_STATE_BACKUP && | |
1083 | ipvs->sysctl_backup_only; | |
1084 | } | |
1085 | ||
d752c364 MRL |
1086 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1087 | { | |
1088 | return ipvs->sysctl_conn_reuse_mode; | |
1089 | } | |
1090 | ||
94485fed AG |
1091 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1092 | { | |
1093 | return ipvs->sysctl_schedule_icmp; | |
1094 | } | |
1095 | ||
4e478098 AG |
1096 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1097 | { | |
1098 | return ipvs->sysctl_ignore_tunneled; | |
1099 | } | |
1100 | ||
59e0350e SH |
1101 | #else |
1102 | ||
1103 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1104 | { | |
1105 | return DEFAULT_SYNC_THRESHOLD; | |
1106 | } | |
1107 | ||
1108 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1109 | { | |
1110 | return DEFAULT_SYNC_PERIOD; | |
1111 | } | |
1112 | ||
749c42b6 JA |
1113 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
1114 | { | |
1115 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1116 | } | |
1117 | ||
1118 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1119 | { | |
1120 | return DEFAULT_SYNC_RETRIES & 3; | |
1121 | } | |
1122 | ||
7532e8d4 SH |
1123 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1124 | { | |
1125 | return DEFAULT_SYNC_VER; | |
1126 | } | |
1127 | ||
c6c96c18 AF |
1128 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1129 | { | |
1130 | return DEFAULT_SLOPPY_TCP; | |
1131 | } | |
1132 | ||
1133 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1134 | { | |
1135 | return DEFAULT_SLOPPY_SCTP; | |
1136 | } | |
1137 | ||
f73181c8 PNA |
1138 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1139 | { | |
1140 | return 1; | |
1141 | } | |
1142 | ||
4d0c875d JA |
1143 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1144 | { | |
1145 | return 0; | |
1146 | } | |
1147 | ||
07995674 | 1148 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1149 | { |
1150 | return IPVS_SYNC_QLEN_MAX; | |
1151 | } | |
1152 | ||
1153 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1154 | { | |
1155 | return 0; | |
1156 | } | |
1157 | ||
3654e611 JA |
1158 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1159 | { | |
1160 | return 1; | |
1161 | } | |
1162 | ||
0c12582f JA |
1163 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1164 | { | |
1165 | return 0; | |
1166 | } | |
1167 | ||
d752c364 MRL |
1168 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1169 | { | |
1170 | return 1; | |
1171 | } | |
1172 | ||
94485fed AG |
1173 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1174 | { | |
1175 | return 0; | |
1176 | } | |
1177 | ||
4e478098 AG |
1178 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1179 | { | |
1180 | return 0; | |
1181 | } | |
1182 | ||
59e0350e SH |
1183 | #endif |
1184 | ||
07dcc686 SH |
1185 | /* IPVS core functions |
1186 | * (from ip_vs_core.c) | |
1da177e4 | 1187 | */ |
5c3a0fd7 JP |
1188 | const char *ip_vs_proto_name(unsigned int proto); |
1189 | void ip_vs_init_hash_table(struct list_head *table, int rows); | |
afdd6140 | 1190 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 1191 | |
1da177e4 LT |
1192 | #define IP_VS_APP_TYPE_FTP 1 |
1193 | ||
07dcc686 SH |
1194 | /* ip_vs_conn handling functions |
1195 | * (from ip_vs_conn.c) | |
1da177e4 | 1196 | */ |
1da177e4 LT |
1197 | enum { |
1198 | IP_VS_DIR_INPUT = 0, | |
1199 | IP_VS_DIR_OUTPUT, | |
1200 | IP_VS_DIR_INPUT_ONLY, | |
1201 | IP_VS_DIR_LAST, | |
1202 | }; | |
1203 | ||
19913dec | 1204 | static inline void ip_vs_conn_fill_param(struct netns_ipvs *ipvs, int af, int protocol, |
f11017ec SH |
1205 | const union nf_inet_addr *caddr, |
1206 | __be16 cport, | |
1207 | const union nf_inet_addr *vaddr, | |
1208 | __be16 vport, | |
1209 | struct ip_vs_conn_param *p) | |
1210 | { | |
19913dec | 1211 | p->ipvs = ipvs; |
f11017ec SH |
1212 | p->af = af; |
1213 | p->protocol = protocol; | |
1214 | p->caddr = caddr; | |
1215 | p->cport = cport; | |
1216 | p->vaddr = vaddr; | |
1217 | p->vport = vport; | |
85999283 SH |
1218 | p->pe = NULL; |
1219 | p->pe_data = NULL; | |
f11017ec | 1220 | } |
28364a59 | 1221 | |
f11017ec SH |
1222 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
1223 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 1224 | |
5c0d2374 | 1225 | struct ip_vs_conn * ip_vs_conn_in_get_proto(int af, const struct sk_buff *skb, |
802c41ad | 1226 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1227 | |
f11017ec | 1228 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 1229 | |
5c0d2374 | 1230 | struct ip_vs_conn * ip_vs_conn_out_get_proto(int af, const struct sk_buff *skb, |
802c41ad | 1231 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1232 | |
088339a5 JA |
1233 | /* Get reference to gain full access to conn. |
1234 | * By default, RCU read-side critical sections have access only to | |
1235 | * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference. | |
1236 | */ | |
1237 | static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp) | |
1238 | { | |
1239 | return atomic_inc_not_zero(&cp->refcnt); | |
1240 | } | |
1241 | ||
1da177e4 LT |
1242 | /* put back the conn without restarting its timer */ |
1243 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1244 | { | |
4e857c58 | 1245 | smp_mb__before_atomic(); |
1da177e4 LT |
1246 | atomic_dec(&cp->refcnt); |
1247 | } | |
5c3a0fd7 JP |
1248 | void ip_vs_conn_put(struct ip_vs_conn *cp); |
1249 | void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); | |
1da177e4 | 1250 | |
ba38528a | 1251 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af, |
f11017ec | 1252 | const union nf_inet_addr *daddr, |
95c96174 | 1253 | __be16 dport, unsigned int flags, |
0e051e68 | 1254 | struct ip_vs_dest *dest, __u32 fwmark); |
5c3a0fd7 | 1255 | void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1da177e4 | 1256 | |
5c3a0fd7 | 1257 | const char *ip_vs_state_name(__u16 proto, int state); |
1da177e4 | 1258 | |
5c3a0fd7 JP |
1259 | void ip_vs_tcp_conn_listen(struct net *net, struct ip_vs_conn *cp); |
1260 | int ip_vs_check_template(struct ip_vs_conn *ct); | |
423b5595 | 1261 | void ip_vs_random_dropentry(struct netns_ipvs *ipvs); |
5c3a0fd7 JP |
1262 | int ip_vs_conn_init(void); |
1263 | void ip_vs_conn_cleanup(void); | |
1da177e4 LT |
1264 | |
1265 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1266 | { | |
1267 | struct ip_vs_conn *ctl_cp = cp->control; | |
1268 | if (!ctl_cp) { | |
cfc78c5a JV |
1269 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
1270 | "%s:%d to %s:%d\n", | |
1271 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1272 | ntohs(cp->cport), | |
1273 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1274 | ntohs(cp->vport)); | |
1275 | ||
1da177e4 LT |
1276 | return; |
1277 | } | |
1278 | ||
cfc78c5a JV |
1279 | IP_VS_DBG_BUF(7, "DELeting control for: " |
1280 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1281 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1282 | ntohs(cp->cport), | |
1283 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1284 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1285 | |
1286 | cp->control = NULL; | |
1287 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1288 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1289 | "%s:%d to %s:%d\n", | |
1290 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1291 | ntohs(cp->cport), | |
1292 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1293 | ntohs(cp->vport)); | |
1294 | ||
1da177e4 LT |
1295 | return; |
1296 | } | |
1297 | atomic_dec(&ctl_cp->n_control); | |
1298 | } | |
1299 | ||
1300 | static inline void | |
1301 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1302 | { | |
1303 | if (cp->control) { | |
cfc78c5a JV |
1304 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
1305 | "%s:%d to %s:%d\n", | |
1306 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1307 | ntohs(cp->cport), | |
1308 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1309 | ntohs(cp->vport)); | |
1310 | ||
1da177e4 LT |
1311 | ip_vs_control_del(cp); |
1312 | } | |
1313 | ||
cfc78c5a JV |
1314 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1315 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1316 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1317 | ntohs(cp->cport), | |
1318 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1319 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1320 | |
1321 | cp->control = ctl_cp; | |
1322 | atomic_inc(&ctl_cp->n_control); | |
1323 | } | |
1324 | ||
07dcc686 | 1325 | /* IPVS netns init & cleanup functions */ |
a4dd0360 | 1326 | int ip_vs_estimator_net_init(struct netns_ipvs *ipvs); |
3d993766 | 1327 | int ip_vs_control_net_init(struct netns_ipvs *ipvs); |
5c3a0fd7 | 1328 | int ip_vs_protocol_net_init(struct net *net); |
b5dd212c | 1329 | int ip_vs_app_net_init(struct netns_ipvs *ipvs); |
5c3a0fd7 | 1330 | int ip_vs_conn_net_init(struct net *net); |
802cb437 | 1331 | int ip_vs_sync_net_init(struct netns_ipvs *ipvs); |
5c3a0fd7 | 1332 | void ip_vs_conn_net_cleanup(struct net *net); |
b5dd212c | 1333 | void ip_vs_app_net_cleanup(struct netns_ipvs *ipvs); |
5c3a0fd7 | 1334 | void ip_vs_protocol_net_cleanup(struct net *net); |
3d993766 | 1335 | void ip_vs_control_net_cleanup(struct netns_ipvs *ipvs); |
a4dd0360 | 1336 | void ip_vs_estimator_net_cleanup(struct netns_ipvs *ipvs); |
ebea1f7c | 1337 | void ip_vs_sync_net_cleanup(struct netns_ipvs *ipvs); |
56d2169b | 1338 | void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs); |
1da177e4 | 1339 | |
07dcc686 SH |
1340 | /* IPVS application functions |
1341 | * (from ip_vs_app.c) | |
1da177e4 LT |
1342 | */ |
1343 | #define IP_VS_APP_MAX_PORTS 8 | |
9f8128a5 EB |
1344 | struct ip_vs_app *register_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); |
1345 | void unregister_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); | |
5c3a0fd7 JP |
1346 | int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
1347 | void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
3250dc9c | 1348 | int register_ip_vs_app_inc(struct netns_ipvs *ipvs, struct ip_vs_app *app, __u16 proto, |
5c3a0fd7 JP |
1349 | __u16 port); |
1350 | int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
1351 | void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1352 | ||
1353 | int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); | |
1354 | int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
1da177e4 | 1355 | |
8be67a66 SH |
1356 | int register_ip_vs_pe(struct ip_vs_pe *pe); |
1357 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1358 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1359 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 | 1360 | |
07dcc686 | 1361 | /* Use a #define to avoid all of module.h just for these trivial ops */ |
69e7dae4 PG |
1362 | #define ip_vs_pe_get(pe) \ |
1363 | if (pe && pe->module) \ | |
e9e5eee8 | 1364 | __module_get(pe->module); |
e9e5eee8 | 1365 | |
69e7dae4 PG |
1366 | #define ip_vs_pe_put(pe) \ |
1367 | if (pe && pe->module) \ | |
e9e5eee8 | 1368 | module_put(pe->module); |
1da177e4 | 1369 | |
07dcc686 | 1370 | /* IPVS protocol functions (from ip_vs_proto.c) */ |
5c3a0fd7 JP |
1371 | int ip_vs_protocol_init(void); |
1372 | void ip_vs_protocol_cleanup(void); | |
1373 | void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); | |
1374 | int *ip_vs_create_timeout_table(int *table, int size); | |
1375 | int ip_vs_set_state_timeout(int *table, int num, const char *const *names, | |
1376 | const char *name, int to); | |
1377 | void ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, | |
1378 | const struct sk_buff *skb, int offset, | |
1379 | const char *msg); | |
1da177e4 LT |
1380 | |
1381 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1382 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1383 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1384 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1385 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1386 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 | 1387 | |
07dcc686 SH |
1388 | /* Registering/unregistering scheduler functions |
1389 | * (from ip_vs_sched.c) | |
1da177e4 | 1390 | */ |
5c3a0fd7 JP |
1391 | int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
1392 | int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1393 | int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1394 | struct ip_vs_scheduler *scheduler); | |
1395 | void ip_vs_unbind_scheduler(struct ip_vs_service *svc, | |
1396 | struct ip_vs_scheduler *sched); | |
1397 | struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1398 | void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1399 | struct ip_vs_conn * | |
190ecd27 | 1400 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
d4383f04 JDB |
1401 | struct ip_vs_proto_data *pd, int *ignored, |
1402 | struct ip_vs_iphdr *iph); | |
5c3a0fd7 JP |
1403 | int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
1404 | struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); | |
1da177e4 | 1405 | |
5c3a0fd7 | 1406 | void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
41ac51ee | 1407 | |
07dcc686 | 1408 | /* IPVS control data and functions (from ip_vs_ctl.c) */ |
1da177e4 | 1409 | extern struct ip_vs_stats ip_vs_stats; |
b880c1f0 | 1410 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 | 1411 | |
5c3a0fd7 | 1412 | struct ip_vs_service * |
0a4fd6ce | 1413 | ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1414 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 | 1415 | |
48aed1b0 | 1416 | bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, |
5c3a0fd7 JP |
1417 | const union nf_inet_addr *daddr, __be16 dport); |
1418 | ||
1419 | int ip_vs_use_count_inc(void); | |
1420 | void ip_vs_use_count_dec(void); | |
1421 | int ip_vs_register_nl_ioctl(void); | |
1422 | void ip_vs_unregister_nl_ioctl(void); | |
1423 | int ip_vs_control_init(void); | |
1424 | void ip_vs_control_cleanup(void); | |
1425 | struct ip_vs_dest * | |
dc2add6f | 1426 | ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af, |
655eef10 AG |
1427 | const union nf_inet_addr *daddr, __be16 dport, |
1428 | const union nf_inet_addr *vaddr, __be16 vport, | |
52793dbe | 1429 | __u16 protocol, __u32 fwmark, __u32 flags); |
5c3a0fd7 | 1430 | void ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 | 1431 | |
fca9c20a JA |
1432 | static inline void ip_vs_dest_hold(struct ip_vs_dest *dest) |
1433 | { | |
1434 | atomic_inc(&dest->refcnt); | |
1435 | } | |
1436 | ||
1437 | static inline void ip_vs_dest_put(struct ip_vs_dest *dest) | |
1438 | { | |
4e857c58 | 1439 | smp_mb__before_atomic(); |
fca9c20a JA |
1440 | atomic_dec(&dest->refcnt); |
1441 | } | |
1da177e4 | 1442 | |
9e4e948a JA |
1443 | static inline void ip_vs_dest_put_and_free(struct ip_vs_dest *dest) |
1444 | { | |
1445 | if (atomic_dec_return(&dest->refcnt) < 0) | |
1446 | kfree(dest); | |
1447 | } | |
1448 | ||
07dcc686 SH |
1449 | /* IPVS sync daemon data and function prototypes |
1450 | * (from ip_vs_sync.c) | |
1da177e4 | 1451 | */ |
6ac121d7 | 1452 | int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *cfg, |
e4ff6751 | 1453 | int state); |
b3cf3cbf | 1454 | int stop_sync_thread(struct netns_ipvs *ipvs, int state); |
b61a8c1a | 1455 | void ip_vs_sync_conn(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, int pkts); |
1da177e4 | 1456 | |
07dcc686 | 1457 | /* IPVS rate estimator prototypes (from ip_vs_est.c) */ |
0f34d54b EB |
1458 | void ip_vs_start_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); |
1459 | void ip_vs_stop_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); | |
5c3a0fd7 | 1460 | void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
cd67cd5e | 1461 | void ip_vs_read_estimator(struct ip_vs_kstats *dst, struct ip_vs_stats *stats); |
1da177e4 | 1462 | |
07dcc686 | 1463 | /* Various IPVS packet transmitters (from ip_vs_xmit.c) */ |
5c3a0fd7 JP |
1464 | int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
1465 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1466 | int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1467 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1468 | int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1469 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1470 | int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1471 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1472 | int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1473 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1474 | int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1475 | struct ip_vs_protocol *pp, int offset, | |
1476 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
1477 | void ip_vs_dest_dst_rcu_free(struct rcu_head *head); | |
1da177e4 | 1478 | |
b3cdd2a7 | 1479 | #ifdef CONFIG_IP_VS_IPV6 |
5c3a0fd7 JP |
1480 | int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
1481 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1482 | int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1483 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1484 | int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1485 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1486 | int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1487 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1488 | int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1489 | struct ip_vs_protocol *pp, int offset, | |
1490 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
b3cdd2a7 | 1491 | #endif |
1da177e4 | 1492 | |
3a1bbf18 | 1493 | #ifdef CONFIG_SYSCTL |
07dcc686 SH |
1494 | /* This is a simple mechanism to ignore packets when |
1495 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1496 | * we start to drop 1/rate of the packets | |
1da177e4 | 1497 | */ |
a0840e2e | 1498 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1499 | { |
a0840e2e HS |
1500 | if (!ipvs->drop_rate) |
1501 | return 0; | |
1502 | if (--ipvs->drop_counter > 0) | |
1503 | return 0; | |
1504 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1505 | return 1; |
1506 | } | |
3a1bbf18 SH |
1507 | #else |
1508 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1509 | #endif | |
1da177e4 | 1510 | |
07dcc686 | 1511 | /* ip_vs_fwd_tag returns the forwarding tag of the connection */ |
1da177e4 LT |
1512 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) |
1513 | ||
732db659 | 1514 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1515 | { |
1516 | char fwd; | |
1517 | ||
1518 | switch (IP_VS_FWD_METHOD(cp)) { | |
1519 | case IP_VS_CONN_F_MASQ: | |
1520 | fwd = 'M'; break; | |
1521 | case IP_VS_CONN_F_LOCALNODE: | |
1522 | fwd = 'L'; break; | |
1523 | case IP_VS_CONN_F_TUNNEL: | |
1524 | fwd = 'T'; break; | |
1525 | case IP_VS_CONN_F_DROUTE: | |
1526 | fwd = 'R'; break; | |
1527 | case IP_VS_CONN_F_BYPASS: | |
1528 | fwd = 'B'; break; | |
1529 | default: | |
1530 | fwd = '?'; break; | |
1531 | } | |
1532 | return fwd; | |
1533 | } | |
1534 | ||
5c3a0fd7 JP |
1535 | void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1536 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 JV |
1537 | |
1538 | #ifdef CONFIG_IP_VS_IPV6 | |
5c3a0fd7 JP |
1539 | void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1540 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 | 1541 | #endif |
1da177e4 | 1542 | |
5c3a0fd7 | 1543 | __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1544 | |
f9214b26 | 1545 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1546 | { |
f9214b26 | 1547 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1548 | |
07f0757a | 1549 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1550 | } |
1551 | ||
0bbdd42b JV |
1552 | #ifdef CONFIG_IP_VS_IPV6 |
1553 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1554 | __wsum oldsum) | |
1555 | { | |
1556 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1557 | new[3], new[2], new[1], new[0] }; | |
1558 | ||
07f0757a | 1559 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1560 | } |
1561 | #endif | |
1562 | ||
f9214b26 AV |
1563 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1564 | { | |
1565 | __be16 diff[2] = { ~old, new }; | |
1566 | ||
07f0757a | 1567 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1568 | } |
1569 | ||
07dcc686 | 1570 | /* Forget current conntrack (unconfirmed) and attach notrack entry */ |
cf356d69 JA |
1571 | static inline void ip_vs_notrack(struct sk_buff *skb) |
1572 | { | |
1573 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1574 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1575 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 JA |
1576 | |
1577 | if (!ct || !nf_ct_is_untracked(ct)) { | |
9e33ce45 | 1578 | nf_conntrack_put(skb->nfct); |
cf356d69 JA |
1579 | skb->nfct = &nf_ct_untracked_get()->ct_general; |
1580 | skb->nfctinfo = IP_CT_NEW; | |
1581 | nf_conntrack_get(skb->nfct); | |
1582 | } | |
1583 | #endif | |
1584 | } | |
1585 | ||
f4bc17cd | 1586 | #ifdef CONFIG_IP_VS_NFCT |
07dcc686 SH |
1587 | /* Netfilter connection tracking |
1588 | * (from ip_vs_nfct.c) | |
f4bc17cd | 1589 | */ |
a0840e2e | 1590 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1591 | { |
a4e2f5a7 | 1592 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1593 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1594 | #else |
1595 | return 0; | |
1596 | #endif | |
f4bc17cd JA |
1597 | } |
1598 | ||
5c3a0fd7 JP |
1599 | void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1600 | int outin); | |
1601 | int ip_vs_confirm_conntrack(struct sk_buff *skb); | |
1602 | void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1603 | struct ip_vs_conn *cp, u_int8_t proto, | |
1604 | const __be16 port, int from_rs); | |
1605 | void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
f4bc17cd JA |
1606 | |
1607 | #else | |
1608 | ||
a0840e2e | 1609 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1610 | { |
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1615 | struct ip_vs_conn *cp, int outin) | |
1616 | { | |
1617 | } | |
1618 | ||
e23ebf0f | 1619 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
f4bc17cd JA |
1620 | { |
1621 | return NF_ACCEPT; | |
1622 | } | |
1623 | ||
1624 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1625 | { | |
1626 | } | |
07dcc686 | 1627 | #endif /* CONFIG_IP_VS_NFCT */ |
6523ce15 | 1628 | |
c16526a7 | 1629 | static inline int |
b552f7e3 CG |
1630 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) |
1631 | { | |
07dcc686 | 1632 | /* We think the overhead of processing active connections is 256 |
b552f7e3 CG |
1633 | * times higher than that of inactive connections in average. (This |
1634 | * 256 times might not be accurate, we will change it later) We | |
1635 | * use the following formula to estimate the overhead now: | |
1636 | * dest->activeconns*256 + dest->inactconns | |
1637 | */ | |
1638 | return (atomic_read(&dest->activeconns) << 8) + | |
1639 | atomic_read(&dest->inactconns); | |
1640 | } | |
1641 | ||
bc4768eb | 1642 | #endif /* _NET_IP_VS_H */ |