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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
07dcc686 SH |
2 | /* IP Virtual Server |
3 | * data structure and functionality definitions | |
1da177e4 LT |
4 | */ |
5 | ||
bc4768eb JV |
6 | #ifndef _NET_IP_VS_H |
7 | #define _NET_IP_VS_H | |
1da177e4 | 8 | |
bc4768eb | 9 | #include <linux/ip_vs.h> /* definitions shared with userland */ |
1da177e4 | 10 | |
bc4768eb JV |
11 | #include <asm/types.h> /* for __uXX types */ |
12 | ||
1da177e4 LT |
13 | #include <linux/list.h> /* for struct list_head */ |
14 | #include <linux/spinlock.h> /* for struct rwlock_t */ | |
07dcc686 | 15 | #include <linux/atomic.h> /* for struct atomic_t */ |
b54ab92b RE |
16 | #include <linux/refcount.h> /* for struct refcount_t */ |
17 | ||
1da177e4 | 18 | #include <linux/compiler.h> |
14c85021 | 19 | #include <linux/timer.h> |
187f1882 | 20 | #include <linux/bug.h> |
1da177e4 | 21 | |
14c85021 | 22 | #include <net/checksum.h> |
e7ade46a | 23 | #include <linux/netfilter.h> /* for union nf_inet_addr */ |
1668e010 | 24 | #include <linux/ip.h> |
e7ade46a | 25 | #include <linux/ipv6.h> /* for struct ipv6hdr */ |
4e3fd7a0 | 26 | #include <net/ipv6.h> |
54d83efa | 27 | #if IS_ENABLED(CONFIG_IP_VS_IPV6) |
63dca2c0 JDB |
28 | #include <linux/netfilter_ipv6/ip6_tables.h> |
29 | #endif | |
a638e514 | 30 | #if IS_ENABLED(CONFIG_NF_CONNTRACK) |
f4bc17cd JA |
31 | #include <net/netfilter/nf_conntrack.h> |
32 | #endif | |
61b1ab45 HS |
33 | #include <net/net_namespace.h> /* Netw namespace */ |
34 | ||
4fd9beef AG |
35 | #define IP_VS_HDR_INVERSE 1 |
36 | #define IP_VS_HDR_ICMP 2 | |
37 | ||
07dcc686 | 38 | /* Generic access of ipvs struct */ |
61b1ab45 HS |
39 | static inline struct netns_ipvs *net_ipvs(struct net* net) |
40 | { | |
41 | return net->ipvs; | |
42 | } | |
07dcc686 | 43 | |
07dcc686 | 44 | /* This one needed for single_open_net since net is stored directly in |
25985edc | 45 | * private not as a struct i.e. seq_file_net can't be used. |
b17fc996 HS |
46 | */ |
47 | static inline struct net *seq_file_single_net(struct seq_file *seq) | |
48 | { | |
49 | #ifdef CONFIG_NET_NS | |
50 | return (struct net *)seq->private; | |
51 | #else | |
52 | return &init_net; | |
53 | #endif | |
54 | } | |
6f7edb48 CB |
55 | |
56 | /* Connections' size value needed by ip_vs_ctl.c */ | |
57 | extern int ip_vs_conn_tab_size; | |
58 | ||
64aae3cb | 59 | struct ip_vs_iphdr { |
4fd9beef | 60 | int hdr_flags; /* ipvs flags */ |
b0e010c5 | 61 | __u32 off; /* Where IP or IPv4 header starts */ |
63dca2c0 | 62 | __u32 len; /* IPv4 simply where L4 starts |
07dcc686 | 63 | * IPv6 where L4 Transport Header starts */ |
63dca2c0 JDB |
64 | __u16 fragoffs; /* IPv6 fragment offset, 0 if first frag (or not frag)*/ |
65 | __s16 protocol; | |
66 | __s32 flags; | |
64aae3cb JV |
67 | union nf_inet_addr saddr; |
68 | union nf_inet_addr daddr; | |
69 | }; | |
70 | ||
2f74713d JDB |
71 | static inline void *frag_safe_skb_hp(const struct sk_buff *skb, int offset, |
72 | int len, void *buffer, | |
73 | const struct ip_vs_iphdr *ipvsh) | |
74 | { | |
75 | return skb_header_pointer(skb, offset, len, buffer); | |
76 | } | |
2f74713d | 77 | |
63dca2c0 JDB |
78 | /* This function handles filling *ip_vs_iphdr, both for IPv4 and IPv6. |
79 | * IPv6 requires some extra work, as finding proper header position, | |
80 | * depend on the IPv6 extension headers. | |
81 | */ | |
b0e010c5 AG |
82 | static inline int |
83 | ip_vs_fill_iph_skb_off(int af, const struct sk_buff *skb, int offset, | |
4fd9beef | 84 | int hdr_flags, struct ip_vs_iphdr *iphdr) |
64aae3cb | 85 | { |
4fd9beef | 86 | iphdr->hdr_flags = hdr_flags; |
b0e010c5 | 87 | iphdr->off = offset; |
4fd9beef | 88 | |
64aae3cb JV |
89 | #ifdef CONFIG_IP_VS_IPV6 |
90 | if (af == AF_INET6) { | |
b0e010c5 AG |
91 | struct ipv6hdr _iph; |
92 | const struct ipv6hdr *iph = skb_header_pointer( | |
93 | skb, offset, sizeof(_iph), &_iph); | |
94 | if (!iph) | |
95 | return 0; | |
96 | ||
4e3fd7a0 AD |
97 | iphdr->saddr.in6 = iph->saddr; |
98 | iphdr->daddr.in6 = iph->daddr; | |
6aafeef0 | 99 | /* ipv6_find_hdr() updates len, flags */ |
b0e010c5 | 100 | iphdr->len = offset; |
63dca2c0 JDB |
101 | iphdr->flags = 0; |
102 | iphdr->protocol = ipv6_find_hdr(skb, &iphdr->len, -1, | |
103 | &iphdr->fragoffs, | |
104 | &iphdr->flags); | |
b0e010c5 AG |
105 | if (iphdr->protocol < 0) |
106 | return 0; | |
64aae3cb JV |
107 | } else |
108 | #endif | |
109 | { | |
b0e010c5 AG |
110 | struct iphdr _iph; |
111 | const struct iphdr *iph = skb_header_pointer( | |
112 | skb, offset, sizeof(_iph), &_iph); | |
113 | if (!iph) | |
114 | return 0; | |
115 | ||
116 | iphdr->len = offset + iph->ihl * 4; | |
63dca2c0 JDB |
117 | iphdr->fragoffs = 0; |
118 | iphdr->protocol = iph->protocol; | |
119 | iphdr->saddr.ip = iph->saddr; | |
120 | iphdr->daddr.ip = iph->daddr; | |
121 | } | |
b0e010c5 AG |
122 | |
123 | return 1; | |
124 | } | |
125 | ||
126 | static inline int | |
4fd9beef AG |
127 | ip_vs_fill_iph_skb_icmp(int af, const struct sk_buff *skb, int offset, |
128 | bool inverse, struct ip_vs_iphdr *iphdr) | |
129 | { | |
130 | int hdr_flags = IP_VS_HDR_ICMP; | |
131 | ||
132 | if (inverse) | |
133 | hdr_flags |= IP_VS_HDR_INVERSE; | |
134 | ||
135 | return ip_vs_fill_iph_skb_off(af, skb, offset, hdr_flags, iphdr); | |
136 | } | |
137 | ||
138 | static inline int | |
139 | ip_vs_fill_iph_skb(int af, const struct sk_buff *skb, bool inverse, | |
140 | struct ip_vs_iphdr *iphdr) | |
141 | { | |
142 | int hdr_flags = 0; | |
143 | ||
144 | if (inverse) | |
145 | hdr_flags |= IP_VS_HDR_INVERSE; | |
146 | ||
147 | return ip_vs_fill_iph_skb_off(af, skb, skb_network_offset(skb), | |
148 | hdr_flags, iphdr); | |
149 | } | |
150 | ||
151 | static inline bool | |
152 | ip_vs_iph_inverse(const struct ip_vs_iphdr *iph) | |
153 | { | |
154 | return !!(iph->hdr_flags & IP_VS_HDR_INVERSE); | |
155 | } | |
156 | ||
157 | static inline bool | |
158 | ip_vs_iph_icmp(const struct ip_vs_iphdr *iph) | |
b0e010c5 | 159 | { |
4fd9beef | 160 | return !!(iph->hdr_flags & IP_VS_HDR_ICMP); |
63dca2c0 JDB |
161 | } |
162 | ||
64aae3cb JV |
163 | static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, |
164 | const union nf_inet_addr *src) | |
165 | { | |
166 | #ifdef CONFIG_IP_VS_IPV6 | |
167 | if (af == AF_INET6) | |
4e3fd7a0 | 168 | dst->in6 = src->in6; |
64aae3cb JV |
169 | else |
170 | #endif | |
171 | dst->ip = src->ip; | |
172 | } | |
173 | ||
9a05475c JA |
174 | static inline void ip_vs_addr_set(int af, union nf_inet_addr *dst, |
175 | const union nf_inet_addr *src) | |
176 | { | |
177 | #ifdef CONFIG_IP_VS_IPV6 | |
178 | if (af == AF_INET6) { | |
179 | dst->in6 = src->in6; | |
180 | return; | |
181 | } | |
182 | #endif | |
183 | dst->ip = src->ip; | |
184 | dst->all[1] = 0; | |
185 | dst->all[2] = 0; | |
186 | dst->all[3] = 0; | |
187 | } | |
188 | ||
64aae3cb JV |
189 | static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, |
190 | const union nf_inet_addr *b) | |
191 | { | |
192 | #ifdef CONFIG_IP_VS_IPV6 | |
193 | if (af == AF_INET6) | |
194 | return ipv6_addr_equal(&a->in6, &b->in6); | |
195 | #endif | |
196 | return a->ip == b->ip; | |
197 | } | |
198 | ||
1da177e4 | 199 | #ifdef CONFIG_IP_VS_DEBUG |
14c85021 ACM |
200 | #include <linux/net.h> |
201 | ||
5c3a0fd7 | 202 | int ip_vs_get_debug_level(void); |
c842a3ad JV |
203 | |
204 | static inline const char *ip_vs_dbg_addr(int af, char *buf, size_t buf_len, | |
205 | const union nf_inet_addr *addr, | |
206 | int *idx) | |
207 | { | |
208 | int len; | |
209 | #ifdef CONFIG_IP_VS_IPV6 | |
210 | if (af == AF_INET6) | |
120b9c14 | 211 | len = snprintf(&buf[*idx], buf_len - *idx, "[%pI6c]", |
0c6ce78a | 212 | &addr->in6) + 1; |
c842a3ad JV |
213 | else |
214 | #endif | |
3685f25d HH |
215 | len = snprintf(&buf[*idx], buf_len - *idx, "%pI4", |
216 | &addr->ip) + 1; | |
c842a3ad JV |
217 | |
218 | *idx += len; | |
219 | BUG_ON(*idx > buf_len + 1); | |
220 | return &buf[*idx - len]; | |
221 | } | |
222 | ||
9aada7ac HE |
223 | #define IP_VS_DBG_BUF(level, msg, ...) \ |
224 | do { \ | |
225 | char ip_vs_dbg_buf[160]; \ | |
226 | int ip_vs_dbg_idx = 0; \ | |
227 | if (level <= ip_vs_get_debug_level()) \ | |
228 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
229 | } while (0) | |
230 | #define IP_VS_ERR_BUF(msg...) \ | |
231 | do { \ | |
232 | char ip_vs_dbg_buf[160]; \ | |
233 | int ip_vs_dbg_idx = 0; \ | |
234 | pr_err(msg); \ | |
235 | } while (0) | |
c842a3ad JV |
236 | |
237 | /* Only use from within IP_VS_DBG_BUF() or IP_VS_ERR_BUF macros */ | |
9aada7ac HE |
238 | #define IP_VS_DBG_ADDR(af, addr) \ |
239 | ip_vs_dbg_addr(af, ip_vs_dbg_buf, \ | |
240 | sizeof(ip_vs_dbg_buf), addr, \ | |
241 | &ip_vs_dbg_idx) | |
242 | ||
243 | #define IP_VS_DBG(level, msg, ...) \ | |
244 | do { \ | |
245 | if (level <= ip_vs_get_debug_level()) \ | |
246 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
247 | } while (0) | |
248 | #define IP_VS_DBG_RL(msg, ...) \ | |
249 | do { \ | |
250 | if (net_ratelimit()) \ | |
251 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | |
252 | } while (0) | |
0d79641a | 253 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
254 | do { \ |
255 | if (level <= ip_vs_get_debug_level()) \ | |
0d79641a | 256 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 257 | } while (0) |
0d79641a | 258 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) \ |
9aada7ac HE |
259 | do { \ |
260 | if (level <= ip_vs_get_debug_level() && \ | |
261 | net_ratelimit()) \ | |
0d79641a | 262 | pp->debug_packet(af, pp, skb, ofs, msg); \ |
9aada7ac | 263 | } while (0) |
1da177e4 | 264 | #else /* NO DEBUGGING at ALL */ |
c842a3ad JV |
265 | #define IP_VS_DBG_BUF(level, msg...) do {} while (0) |
266 | #define IP_VS_ERR_BUF(msg...) do {} while (0) | |
1da177e4 LT |
267 | #define IP_VS_DBG(level, msg...) do {} while (0) |
268 | #define IP_VS_DBG_RL(msg...) do {} while (0) | |
0d79641a JA |
269 | #define IP_VS_DBG_PKT(level, af, pp, skb, ofs, msg) do {} while (0) |
270 | #define IP_VS_DBG_RL_PKT(level, af, pp, skb, ofs, msg) do {} while (0) | |
1da177e4 LT |
271 | #endif |
272 | ||
273 | #define IP_VS_BUG() BUG() | |
1e3e238e | 274 | #define IP_VS_ERR_RL(msg, ...) \ |
9aada7ac HE |
275 | do { \ |
276 | if (net_ratelimit()) \ | |
1e3e238e | 277 | pr_err(msg, ##__VA_ARGS__); \ |
9aada7ac | 278 | } while (0) |
1da177e4 LT |
279 | |
280 | #ifdef CONFIG_IP_VS_DEBUG | |
281 | #define EnterFunction(level) \ | |
9aada7ac HE |
282 | do { \ |
283 | if (level <= ip_vs_get_debug_level()) \ | |
284 | printk(KERN_DEBUG \ | |
285 | pr_fmt("Enter: %s, %s line %i\n"), \ | |
286 | __func__, __FILE__, __LINE__); \ | |
287 | } while (0) | |
288 | #define LeaveFunction(level) \ | |
289 | do { \ | |
290 | if (level <= ip_vs_get_debug_level()) \ | |
291 | printk(KERN_DEBUG \ | |
292 | pr_fmt("Leave: %s, %s line %i\n"), \ | |
293 | __func__, __FILE__, __LINE__); \ | |
294 | } while (0) | |
1da177e4 LT |
295 | #else |
296 | #define EnterFunction(level) do {} while (0) | |
297 | #define LeaveFunction(level) do {} while (0) | |
298 | #endif | |
299 | ||
07dcc686 | 300 | /* The port number of FTP service (in network order). */ |
f3a7c66b HH |
301 | #define FTPPORT cpu_to_be16(21) |
302 | #define FTPDATA cpu_to_be16(20) | |
1da177e4 | 303 | |
07dcc686 | 304 | /* TCP State Values */ |
1da177e4 LT |
305 | enum { |
306 | IP_VS_TCP_S_NONE = 0, | |
307 | IP_VS_TCP_S_ESTABLISHED, | |
308 | IP_VS_TCP_S_SYN_SENT, | |
309 | IP_VS_TCP_S_SYN_RECV, | |
310 | IP_VS_TCP_S_FIN_WAIT, | |
311 | IP_VS_TCP_S_TIME_WAIT, | |
312 | IP_VS_TCP_S_CLOSE, | |
313 | IP_VS_TCP_S_CLOSE_WAIT, | |
314 | IP_VS_TCP_S_LAST_ACK, | |
315 | IP_VS_TCP_S_LISTEN, | |
316 | IP_VS_TCP_S_SYNACK, | |
317 | IP_VS_TCP_S_LAST | |
318 | }; | |
319 | ||
07dcc686 | 320 | /* UDP State Values */ |
1da177e4 LT |
321 | enum { |
322 | IP_VS_UDP_S_NORMAL, | |
323 | IP_VS_UDP_S_LAST, | |
324 | }; | |
325 | ||
07dcc686 | 326 | /* ICMP State Values */ |
1da177e4 LT |
327 | enum { |
328 | IP_VS_ICMP_S_NORMAL, | |
329 | IP_VS_ICMP_S_LAST, | |
330 | }; | |
331 | ||
07dcc686 | 332 | /* SCTP State Values */ |
2906f66a VMR |
333 | enum ip_vs_sctp_states { |
334 | IP_VS_SCTP_S_NONE, | |
61e7c420 JA |
335 | IP_VS_SCTP_S_INIT1, |
336 | IP_VS_SCTP_S_INIT, | |
337 | IP_VS_SCTP_S_COOKIE_SENT, | |
338 | IP_VS_SCTP_S_COOKIE_REPLIED, | |
339 | IP_VS_SCTP_S_COOKIE_WAIT, | |
340 | IP_VS_SCTP_S_COOKIE, | |
341 | IP_VS_SCTP_S_COOKIE_ECHOED, | |
2906f66a | 342 | IP_VS_SCTP_S_ESTABLISHED, |
61e7c420 JA |
343 | IP_VS_SCTP_S_SHUTDOWN_SENT, |
344 | IP_VS_SCTP_S_SHUTDOWN_RECEIVED, | |
345 | IP_VS_SCTP_S_SHUTDOWN_ACK_SENT, | |
346 | IP_VS_SCTP_S_REJECTED, | |
2906f66a VMR |
347 | IP_VS_SCTP_S_CLOSED, |
348 | IP_VS_SCTP_S_LAST | |
349 | }; | |
350 | ||
07dcc686 SH |
351 | /* Delta sequence info structure |
352 | * Each ip_vs_conn has 2 (output AND input seq. changes). | |
353 | * Only used in the VS/NAT. | |
1da177e4 LT |
354 | */ |
355 | struct ip_vs_seq { | |
356 | __u32 init_seq; /* Add delta from this seq */ | |
357 | __u32 delta; /* Delta in sequence numbers */ | |
358 | __u32 previous_delta; /* Delta in sequence numbers | |
07dcc686 | 359 | * before last resized pkt */ |
1da177e4 LT |
360 | }; |
361 | ||
07dcc686 | 362 | /* counters per cpu */ |
b17fc996 | 363 | struct ip_vs_counters { |
cd67cd5e JA |
364 | __u64 conns; /* connections scheduled */ |
365 | __u64 inpkts; /* incoming packets */ | |
366 | __u64 outpkts; /* outgoing packets */ | |
b17fc996 HS |
367 | __u64 inbytes; /* incoming bytes */ |
368 | __u64 outbytes; /* outgoing bytes */ | |
369 | }; | |
07dcc686 | 370 | /* Stats per cpu */ |
b17fc996 | 371 | struct ip_vs_cpu_stats { |
cd67cd5e | 372 | struct ip_vs_counters cnt; |
b17fc996 HS |
373 | struct u64_stats_sync syncp; |
374 | }; | |
1da177e4 | 375 | |
07dcc686 | 376 | /* IPVS statistics objects */ |
3a14a313 SW |
377 | struct ip_vs_estimator { |
378 | struct list_head list; | |
379 | ||
380 | u64 last_inbytes; | |
381 | u64 last_outbytes; | |
cd67cd5e JA |
382 | u64 last_conns; |
383 | u64 last_inpkts; | |
384 | u64 last_outpkts; | |
385 | ||
386 | u64 cps; | |
387 | u64 inpps; | |
388 | u64 outpps; | |
389 | u64 inbps; | |
390 | u64 outbps; | |
391 | }; | |
392 | ||
393 | /* | |
394 | * IPVS statistics object, 64-bit kernel version of struct ip_vs_stats_user | |
395 | */ | |
396 | struct ip_vs_kstats { | |
397 | u64 conns; /* connections scheduled */ | |
398 | u64 inpkts; /* incoming packets */ | |
399 | u64 outpkts; /* outgoing packets */ | |
400 | u64 inbytes; /* incoming bytes */ | |
401 | u64 outbytes; /* outgoing bytes */ | |
402 | ||
403 | u64 cps; /* current connection rate */ | |
404 | u64 inpps; /* current in packet rate */ | |
405 | u64 outpps; /* current out packet rate */ | |
406 | u64 inbps; /* current in byte rate */ | |
407 | u64 outbps; /* current out byte rate */ | |
3a14a313 SW |
408 | }; |
409 | ||
fd2c3ef7 | 410 | struct ip_vs_stats { |
cd67cd5e | 411 | struct ip_vs_kstats kstats; /* kernel statistics */ |
e9c0ce23 | 412 | struct ip_vs_estimator est; /* estimator */ |
b962abdc | 413 | struct ip_vs_cpu_stats __percpu *cpustats; /* per cpu counters */ |
b17fc996 | 414 | spinlock_t lock; /* spin lock */ |
cd67cd5e | 415 | struct ip_vs_kstats kstats0; /* reset values */ |
1da177e4 LT |
416 | }; |
417 | ||
14c85021 ACM |
418 | struct dst_entry; |
419 | struct iphdr; | |
1da177e4 LT |
420 | struct ip_vs_conn; |
421 | struct ip_vs_app; | |
14c85021 | 422 | struct sk_buff; |
252c6410 | 423 | struct ip_vs_proto_data; |
1da177e4 LT |
424 | |
425 | struct ip_vs_protocol { | |
426 | struct ip_vs_protocol *next; | |
427 | char *name; | |
2ad17def JA |
428 | u16 protocol; |
429 | u16 num_states; | |
1da177e4 | 430 | int dont_defrag; |
1da177e4 LT |
431 | |
432 | void (*init)(struct ip_vs_protocol *pp); | |
433 | ||
434 | void (*exit)(struct ip_vs_protocol *pp); | |
435 | ||
1281a9c2 | 436 | int (*init_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 437 | |
1281a9c2 | 438 | void (*exit_netns)(struct netns_ipvs *ipvs, struct ip_vs_proto_data *pd); |
252c6410 | 439 | |
d8f44c33 EB |
440 | int (*conn_schedule)(struct netns_ipvs *ipvs, |
441 | int af, struct sk_buff *skb, | |
9330419d | 442 | struct ip_vs_proto_data *pd, |
d4383f04 JDB |
443 | int *verdict, struct ip_vs_conn **cpp, |
444 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
445 | |
446 | struct ip_vs_conn * | |
ab161976 EB |
447 | (*conn_in_get)(struct netns_ipvs *ipvs, |
448 | int af, | |
51ef348b | 449 | const struct sk_buff *skb, |
802c41ad | 450 | const struct ip_vs_iphdr *iph); |
1da177e4 LT |
451 | |
452 | struct ip_vs_conn * | |
0cf705c8 EB |
453 | (*conn_out_get)(struct netns_ipvs *ipvs, |
454 | int af, | |
51ef348b | 455 | const struct sk_buff *skb, |
802c41ad | 456 | const struct ip_vs_iphdr *iph); |
1da177e4 | 457 | |
d4383f04 JDB |
458 | int (*snat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
459 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 460 | |
d4383f04 JDB |
461 | int (*dnat_handler)(struct sk_buff *skb, struct ip_vs_protocol *pp, |
462 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph); | |
1da177e4 | 463 | |
51ef348b JV |
464 | int (*csum_check)(int af, struct sk_buff *skb, |
465 | struct ip_vs_protocol *pp); | |
1da177e4 LT |
466 | |
467 | const char *(*state_name)(int state); | |
468 | ||
4a516f11 SH |
469 | void (*state_transition)(struct ip_vs_conn *cp, int direction, |
470 | const struct sk_buff *skb, | |
471 | struct ip_vs_proto_data *pd); | |
1da177e4 | 472 | |
19648918 | 473 | int (*register_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 | 474 | |
19648918 | 475 | void (*unregister_app)(struct netns_ipvs *ipvs, struct ip_vs_app *inc); |
1da177e4 LT |
476 | |
477 | int (*app_conn_bind)(struct ip_vs_conn *cp); | |
478 | ||
0d79641a | 479 | void (*debug_packet)(int af, struct ip_vs_protocol *pp, |
1da177e4 LT |
480 | const struct sk_buff *skb, |
481 | int offset, | |
482 | const char *msg); | |
483 | ||
9330419d | 484 | void (*timeout_change)(struct ip_vs_proto_data *pd, int flags); |
1da177e4 LT |
485 | }; |
486 | ||
07dcc686 | 487 | /* protocol data per netns */ |
252c6410 HS |
488 | struct ip_vs_proto_data { |
489 | struct ip_vs_proto_data *next; | |
490 | struct ip_vs_protocol *pp; | |
491 | int *timeout_table; /* protocol timeout table */ | |
492 | atomic_t appcnt; /* counter of proto app incs. */ | |
493 | struct tcp_states_t *tcp_state_table; | |
494 | }; | |
495 | ||
5c3a0fd7 | 496 | struct ip_vs_protocol *ip_vs_proto_get(unsigned short proto); |
18d6ade6 | 497 | struct ip_vs_proto_data *ip_vs_proto_data_get(struct netns_ipvs *ipvs, |
5c3a0fd7 | 498 | unsigned short proto); |
1da177e4 | 499 | |
f11017ec | 500 | struct ip_vs_conn_param { |
e64e2b46 | 501 | struct netns_ipvs *ipvs; |
f11017ec SH |
502 | const union nf_inet_addr *caddr; |
503 | const union nf_inet_addr *vaddr; | |
504 | __be16 cport; | |
505 | __be16 vport; | |
506 | __u16 protocol; | |
507 | u16 af; | |
85999283 SH |
508 | |
509 | const struct ip_vs_pe *pe; | |
510 | char *pe_data; | |
511 | __u8 pe_data_len; | |
f11017ec SH |
512 | }; |
513 | ||
07dcc686 | 514 | /* IP_VS structure allocated for each dynamically scheduled connection */ |
1da177e4 | 515 | struct ip_vs_conn { |
731109e7 | 516 | struct hlist_node c_list; /* hashed list heads */ |
1da177e4 | 517 | /* Protocol, addresses and port numbers */ |
6e67e586 | 518 | __be16 cport; |
6e67e586 | 519 | __be16 dport; |
1845ed0b JA |
520 | __be16 vport; |
521 | u16 af; /* address family */ | |
6e67e586 HS |
522 | union nf_inet_addr caddr; /* client address */ |
523 | union nf_inet_addr vaddr; /* virtual address */ | |
524 | union nf_inet_addr daddr; /* destination address */ | |
525 | volatile __u32 flags; /* status flags */ | |
1da177e4 | 526 | __u16 protocol; /* Which protocol (TCP/UDP) */ |
ba38528a | 527 | __u16 daf; /* Address family of the dest */ |
58dbc6f2 | 528 | struct netns_ipvs *ipvs; |
1da177e4 LT |
529 | |
530 | /* counter and timer */ | |
b54ab92b | 531 | refcount_t refcnt; /* reference count */ |
1da177e4 LT |
532 | struct timer_list timer; /* Expiration timer */ |
533 | volatile unsigned long timeout; /* timeout */ | |
534 | ||
535 | /* Flags and state transition */ | |
536 | spinlock_t lock; /* lock for state transition */ | |
1da177e4 | 537 | volatile __u16 state; /* state info */ |
efac5276 RB |
538 | volatile __u16 old_state; /* old state, to be used for |
539 | * state transition triggerd | |
540 | * synchronization | |
541 | */ | |
1845ed0b | 542 | __u32 fwmark; /* Fire wall mark from skb */ |
749c42b6 | 543 | unsigned long sync_endtime; /* jiffies + sent_retries */ |
1da177e4 LT |
544 | |
545 | /* Control members */ | |
546 | struct ip_vs_conn *control; /* Master control connection */ | |
547 | atomic_t n_control; /* Number of controlled ones */ | |
548 | struct ip_vs_dest *dest; /* real server */ | |
549 | atomic_t in_pkts; /* incoming packet counter */ | |
550 | ||
07dcc686 SH |
551 | /* Packet transmitter for different forwarding methods. If it |
552 | * mangles the packet, it must return NF_DROP or better NF_STOLEN, | |
553 | * otherwise this must be changed to a sk_buff **. | |
554 | * NF_ACCEPT can be returned when destination is local. | |
1da177e4 LT |
555 | */ |
556 | int (*packet_xmit)(struct sk_buff *skb, struct ip_vs_conn *cp, | |
d4383f04 | 557 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); |
1da177e4 LT |
558 | |
559 | /* Note: we can group the following members into a structure, | |
07dcc686 SH |
560 | * in order to save more space, and the following members are |
561 | * only used in VS/NAT anyway | |
562 | */ | |
1da177e4 LT |
563 | struct ip_vs_app *app; /* bound ip_vs_app object */ |
564 | void *app_data; /* Application private data */ | |
565 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
566 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
85999283 | 567 | |
e9e5eee8 | 568 | const struct ip_vs_pe *pe; |
85999283 SH |
569 | char *pe_data; |
570 | __u8 pe_data_len; | |
088339a5 JA |
571 | |
572 | struct rcu_head rcu_head; | |
1da177e4 LT |
573 | }; |
574 | ||
07dcc686 SH |
575 | /* Extended internal versions of struct ip_vs_service_user and ip_vs_dest_user |
576 | * for IPv6 support. | |
c860c6b1 | 577 | * |
07dcc686 SH |
578 | * We need these to conveniently pass around service and destination |
579 | * options, but unfortunately, we also need to keep the old definitions to | |
580 | * maintain userspace backwards compatibility for the setsockopt interface. | |
c860c6b1 JV |
581 | */ |
582 | struct ip_vs_service_user_kern { | |
583 | /* virtual service addresses */ | |
584 | u16 af; | |
585 | u16 protocol; | |
586 | union nf_inet_addr addr; /* virtual ip address */ | |
0a925864 | 587 | __be16 port; |
c860c6b1 JV |
588 | u32 fwmark; /* firwall mark of service */ |
589 | ||
590 | /* virtual service options */ | |
591 | char *sched_name; | |
0d1e71b0 | 592 | char *pe_name; |
95c96174 ED |
593 | unsigned int flags; /* virtual service flags */ |
594 | unsigned int timeout; /* persistent timeout in sec */ | |
0a925864 | 595 | __be32 netmask; /* persistent netmask or plen */ |
c860c6b1 JV |
596 | }; |
597 | ||
598 | ||
599 | struct ip_vs_dest_user_kern { | |
600 | /* destination server address */ | |
601 | union nf_inet_addr addr; | |
0a925864 | 602 | __be16 port; |
c860c6b1 JV |
603 | |
604 | /* real server options */ | |
95c96174 | 605 | unsigned int conn_flags; /* connection flags */ |
c860c6b1 JV |
606 | int weight; /* destination weight */ |
607 | ||
608 | /* thresholds for active connections */ | |
609 | u32 u_threshold; /* upper threshold */ | |
610 | u32 l_threshold; /* lower threshold */ | |
6cff339b AG |
611 | |
612 | /* Address family of addr */ | |
613 | u16 af; | |
c860c6b1 JV |
614 | }; |
615 | ||
616 | ||
1da177e4 | 617 | /* |
07dcc686 SH |
618 | * The information about the virtual service offered to the net and the |
619 | * forwarding entries. | |
1da177e4 LT |
620 | */ |
621 | struct ip_vs_service { | |
ceec4c38 JA |
622 | struct hlist_node s_list; /* for normal service table */ |
623 | struct hlist_node f_list; /* for fwmark-based service table */ | |
1da177e4 | 624 | atomic_t refcnt; /* reference counter */ |
1da177e4 | 625 | |
e7ade46a | 626 | u16 af; /* address family */ |
1da177e4 | 627 | __u16 protocol; /* which protocol (TCP/UDP) */ |
e7ade46a | 628 | union nf_inet_addr addr; /* IP address for virtual service */ |
014d730d | 629 | __be16 port; /* port number for the service */ |
1da177e4 | 630 | __u32 fwmark; /* firewall mark of the service */ |
95c96174 ED |
631 | unsigned int flags; /* service status flags */ |
632 | unsigned int timeout; /* persistent timeout in ticks */ | |
0a925864 | 633 | __be32 netmask; /* grouping granularity, mask/plen */ |
3109d2f2 | 634 | struct netns_ipvs *ipvs; |
1da177e4 LT |
635 | |
636 | struct list_head destinations; /* real server d-linked list */ | |
637 | __u32 num_dests; /* number of servers */ | |
638 | struct ip_vs_stats stats; /* statistics for the service */ | |
1da177e4 LT |
639 | |
640 | /* for scheduling */ | |
ceec4c38 | 641 | struct ip_vs_scheduler __rcu *scheduler; /* bound scheduler object */ |
ba3a3ce1 | 642 | spinlock_t sched_lock; /* lock sched_data */ |
1da177e4 | 643 | void *sched_data; /* scheduler application data */ |
85999283 SH |
644 | |
645 | /* alternate persistence engine */ | |
ceec4c38 JA |
646 | struct ip_vs_pe __rcu *pe; |
647 | ||
648 | struct rcu_head rcu_head; | |
1da177e4 LT |
649 | }; |
650 | ||
026ace06 JA |
651 | /* Information for cached dst */ |
652 | struct ip_vs_dest_dst { | |
653 | struct dst_entry *dst_cache; /* destination cache entry */ | |
654 | u32 dst_cookie; | |
655 | union nf_inet_addr dst_saddr; | |
656 | struct rcu_head rcu_head; | |
657 | }; | |
1da177e4 | 658 | |
07dcc686 SH |
659 | /* The real server destination forwarding entry with ip address, port number, |
660 | * and so on. | |
1da177e4 LT |
661 | */ |
662 | struct ip_vs_dest { | |
663 | struct list_head n_list; /* for the dests in the service */ | |
276472ea | 664 | struct hlist_node d_list; /* for table with all the dests */ |
1da177e4 | 665 | |
e7ade46a | 666 | u16 af; /* address family */ |
014d730d | 667 | __be16 port; /* port number of the server */ |
f2431e6e | 668 | union nf_inet_addr addr; /* IP address of the server */ |
95c96174 | 669 | volatile unsigned int flags; /* dest status flags */ |
1da177e4 LT |
670 | atomic_t conn_flags; /* flags to copy to conn */ |
671 | atomic_t weight; /* server weight */ | |
672 | ||
b54ab92b | 673 | refcount_t refcnt; /* reference counter */ |
1da177e4 | 674 | struct ip_vs_stats stats; /* statistics */ |
bcbde4c0 | 675 | unsigned long idle_start; /* start time, jiffies */ |
1da177e4 LT |
676 | |
677 | /* connection counters and thresholds */ | |
678 | atomic_t activeconns; /* active connections */ | |
679 | atomic_t inactconns; /* inactive connections */ | |
680 | atomic_t persistconns; /* persistent connections */ | |
681 | __u32 u_threshold; /* upper threshold */ | |
682 | __u32 l_threshold; /* lower threshold */ | |
683 | ||
684 | /* for destination cache */ | |
685 | spinlock_t dst_lock; /* lock of dst_cache */ | |
026ace06 | 686 | struct ip_vs_dest_dst __rcu *dest_dst; /* cached dst info */ |
1da177e4 LT |
687 | |
688 | /* for virtual service */ | |
bcbde4c0 | 689 | struct ip_vs_service __rcu *svc; /* service it belongs to */ |
1da177e4 | 690 | __u16 protocol; /* which protocol (TCP/UDP) */ |
014d730d | 691 | __be16 vport; /* virtual port number */ |
f2431e6e | 692 | union nf_inet_addr vaddr; /* virtual IP address */ |
1da177e4 | 693 | __u32 vfwmark; /* firewall mark of service */ |
276472ea | 694 | |
578bc3ef | 695 | struct list_head t_list; /* in dest_trash */ |
276472ea | 696 | unsigned int in_rs_table:1; /* we are in rs_table */ |
1da177e4 LT |
697 | }; |
698 | ||
07dcc686 | 699 | /* The scheduler object */ |
1da177e4 LT |
700 | struct ip_vs_scheduler { |
701 | struct list_head n_list; /* d-linked list head */ | |
702 | char *name; /* scheduler name */ | |
703 | atomic_t refcnt; /* reference counter */ | |
704 | struct module *module; /* THIS_MODULE/NULL */ | |
705 | ||
706 | /* scheduler initializing service */ | |
707 | int (*init_service)(struct ip_vs_service *svc); | |
708 | /* scheduling service finish */ | |
ed3ffc4e | 709 | void (*done_service)(struct ip_vs_service *svc); |
6b6df466 JA |
710 | /* dest is linked */ |
711 | int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
712 | /* dest is unlinked */ | |
713 | int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
714 | /* dest is updated */ | |
715 | int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest); | |
1da177e4 LT |
716 | |
717 | /* selecting a server from the given service */ | |
718 | struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc, | |
bba54de5 JA |
719 | const struct sk_buff *skb, |
720 | struct ip_vs_iphdr *iph); | |
1da177e4 LT |
721 | }; |
722 | ||
85999283 SH |
723 | /* The persistence engine object */ |
724 | struct ip_vs_pe { | |
725 | struct list_head n_list; /* d-linked list head */ | |
726 | char *name; /* scheduler name */ | |
727 | atomic_t refcnt; /* reference counter */ | |
728 | struct module *module; /* THIS_MODULE/NULL */ | |
729 | ||
730 | /* get the connection template, if any */ | |
731 | int (*fill_param)(struct ip_vs_conn_param *p, struct sk_buff *skb); | |
732 | bool (*ct_match)(const struct ip_vs_conn_param *p, | |
733 | struct ip_vs_conn *ct); | |
734 | u32 (*hashkey_raw)(const struct ip_vs_conn_param *p, u32 initval, | |
735 | bool inverse); | |
a3c918ac | 736 | int (*show_pe_data)(const struct ip_vs_conn *cp, char *buf); |
39b97223 MA |
737 | /* create connections for real-server outgoing packets */ |
738 | struct ip_vs_conn* (*conn_out)(struct ip_vs_service *svc, | |
739 | struct ip_vs_dest *dest, | |
740 | struct sk_buff *skb, | |
741 | const struct ip_vs_iphdr *iph, | |
742 | __be16 dport, __be16 cport); | |
85999283 | 743 | }; |
1da177e4 | 744 | |
07dcc686 | 745 | /* The application module object (a.k.a. app incarnation) */ |
fd2c3ef7 | 746 | struct ip_vs_app { |
1da177e4 LT |
747 | struct list_head a_list; /* member in app list */ |
748 | int type; /* IP_VS_APP_TYPE_xxx */ | |
749 | char *name; /* application module name */ | |
750 | __u16 protocol; | |
751 | struct module *module; /* THIS_MODULE/NULL */ | |
752 | struct list_head incs_list; /* list of incarnations */ | |
753 | ||
754 | /* members for application incarnations */ | |
755 | struct list_head p_list; /* member in proto app list */ | |
756 | struct ip_vs_app *app; /* its real application */ | |
014d730d | 757 | __be16 port; /* port number in net order */ |
1da177e4 | 758 | atomic_t usecnt; /* usage counter */ |
363c97d7 | 759 | struct rcu_head rcu_head; |
1da177e4 | 760 | |
07dcc686 | 761 | /* output hook: Process packet in inout direction, diff set for TCP. |
8b27b10f JA |
762 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
763 | * 2=Mangled but checksum was not updated | |
764 | */ | |
1da177e4 | 765 | int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 766 | struct sk_buff *, int *diff); |
1da177e4 | 767 | |
07dcc686 | 768 | /* input hook: Process packet in outin direction, diff set for TCP. |
8b27b10f JA |
769 | * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, |
770 | * 2=Mangled but checksum was not updated | |
771 | */ | |
1da177e4 | 772 | int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, |
3db05fea | 773 | struct sk_buff *, int *diff); |
1da177e4 LT |
774 | |
775 | /* ip_vs_app initializer */ | |
776 | int (*init_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
777 | ||
778 | /* ip_vs_app finish */ | |
779 | int (*done_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
780 | ||
781 | ||
782 | /* not used now */ | |
783 | int (*bind_conn)(struct ip_vs_app *, struct ip_vs_conn *, | |
784 | struct ip_vs_protocol *); | |
785 | ||
786 | void (*unbind_conn)(struct ip_vs_app *, struct ip_vs_conn *); | |
787 | ||
788 | int * timeout_table; | |
789 | int * timeouts; | |
790 | int timeouts_size; | |
791 | ||
792 | int (*conn_schedule)(struct sk_buff *skb, struct ip_vs_app *app, | |
793 | int *verdict, struct ip_vs_conn **cpp); | |
794 | ||
795 | struct ip_vs_conn * | |
796 | (*conn_in_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 797 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
798 | |
799 | struct ip_vs_conn * | |
800 | (*conn_out_get)(const struct sk_buff *skb, struct ip_vs_app *app, | |
d4383f04 | 801 | const struct iphdr *iph, int inverse); |
1da177e4 LT |
802 | |
803 | int (*state_transition)(struct ip_vs_conn *cp, int direction, | |
804 | const struct sk_buff *skb, | |
805 | struct ip_vs_app *app); | |
806 | ||
807 | void (*timeout_change)(struct ip_vs_app *app, int flags); | |
808 | }; | |
809 | ||
f73181c8 PNA |
810 | struct ipvs_master_sync_state { |
811 | struct list_head sync_queue; | |
812 | struct ip_vs_sync_buff *sync_buff; | |
07995674 | 813 | unsigned long sync_queue_len; |
f73181c8 | 814 | unsigned int sync_queue_delay; |
f73181c8 PNA |
815 | struct delayed_work master_wakeup_work; |
816 | struct netns_ipvs *ipvs; | |
817 | }; | |
818 | ||
8e739a47 JA |
819 | struct ip_vs_sync_thread_data; |
820 | ||
578bc3ef JA |
821 | /* How much time to keep dests in trash */ |
822 | #define IP_VS_DEST_TRASH_PERIOD (120 * HZ) | |
823 | ||
e4ff6751 | 824 | struct ipvs_sync_daemon_cfg { |
d3328817 | 825 | union nf_inet_addr mcast_group; |
e4ff6751 JA |
826 | int syncid; |
827 | u16 sync_maxlen; | |
d3328817 JA |
828 | u16 mcast_port; |
829 | u8 mcast_af; | |
830 | u8 mcast_ttl; | |
e4ff6751 JA |
831 | /* multicast interface name */ |
832 | char mcast_ifn[IP_VS_IFNAME_MAXLEN]; | |
833 | }; | |
834 | ||
2553d064 JA |
835 | /* IPVS in network namespace */ |
836 | struct netns_ipvs { | |
837 | int gen; /* Generation */ | |
7a4f0761 | 838 | int enable; /* enable like nf_hooks do */ |
07dcc686 | 839 | /* Hash table: for real service lookups */ |
2553d064 JA |
840 | #define IP_VS_RTAB_BITS 4 |
841 | #define IP_VS_RTAB_SIZE (1 << IP_VS_RTAB_BITS) | |
842 | #define IP_VS_RTAB_MASK (IP_VS_RTAB_SIZE - 1) | |
843 | ||
276472ea | 844 | struct hlist_head rs_table[IP_VS_RTAB_SIZE]; |
2553d064 JA |
845 | /* ip_vs_app */ |
846 | struct list_head app_list; | |
2553d064 JA |
847 | /* ip_vs_proto */ |
848 | #define IP_VS_PROTO_TAB_SIZE 32 /* must be power of 2 */ | |
849 | struct ip_vs_proto_data *proto_data_table[IP_VS_PROTO_TAB_SIZE]; | |
850 | /* ip_vs_proto_tcp */ | |
851 | #ifdef CONFIG_IP_VS_PROTO_TCP | |
852 | #define TCP_APP_TAB_BITS 4 | |
853 | #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) | |
854 | #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) | |
855 | struct list_head tcp_apps[TCP_APP_TAB_SIZE]; | |
2553d064 JA |
856 | #endif |
857 | /* ip_vs_proto_udp */ | |
858 | #ifdef CONFIG_IP_VS_PROTO_UDP | |
859 | #define UDP_APP_TAB_BITS 4 | |
860 | #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) | |
861 | #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) | |
862 | struct list_head udp_apps[UDP_APP_TAB_SIZE]; | |
2553d064 JA |
863 | #endif |
864 | /* ip_vs_proto_sctp */ | |
865 | #ifdef CONFIG_IP_VS_PROTO_SCTP | |
866 | #define SCTP_APP_TAB_BITS 4 | |
867 | #define SCTP_APP_TAB_SIZE (1 << SCTP_APP_TAB_BITS) | |
868 | #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) | |
869 | /* Hash table for SCTP application incarnations */ | |
870 | struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; | |
2553d064 JA |
871 | #endif |
872 | /* ip_vs_conn */ | |
07dcc686 | 873 | atomic_t conn_count; /* connection counter */ |
2553d064 JA |
874 | |
875 | /* ip_vs_ctl */ | |
2a0751af | 876 | struct ip_vs_stats tot_stats; /* Statistics & est. */ |
2553d064 JA |
877 | |
878 | int num_services; /* no of virtual services */ | |
f2247fbd | 879 | |
f2247fbd SH |
880 | /* Trash for destinations */ |
881 | struct list_head dest_trash; | |
578bc3ef JA |
882 | spinlock_t dest_trash_lock; |
883 | struct timer_list dest_trash_timer; /* expiration timer */ | |
f2247fbd SH |
884 | /* Service counters */ |
885 | atomic_t ftpsvc_counter; | |
886 | atomic_t nullsvc_counter; | |
39b97223 | 887 | atomic_t conn_out_counter; |
f2247fbd SH |
888 | |
889 | #ifdef CONFIG_SYSCTL | |
2553d064 JA |
890 | /* 1/rate drop and drop-entry variables */ |
891 | struct delayed_work defense_work; /* Work handler */ | |
892 | int drop_rate; | |
893 | int drop_counter; | |
894 | atomic_t dropentry; | |
895 | /* locks in ctl.c */ | |
896 | spinlock_t dropentry_lock; /* drop entry handling */ | |
897 | spinlock_t droppacket_lock; /* drop packet handling */ | |
898 | spinlock_t securetcp_lock; /* state and timeout tables */ | |
2553d064 JA |
899 | |
900 | /* sys-ctl struct */ | |
901 | struct ctl_table_header *sysctl_hdr; | |
902 | struct ctl_table *sysctl_tbl; | |
f2247fbd SH |
903 | #endif |
904 | ||
2553d064 JA |
905 | /* sysctl variables */ |
906 | int sysctl_amemthresh; | |
907 | int sysctl_am_droprate; | |
908 | int sysctl_drop_entry; | |
909 | int sysctl_drop_packet; | |
910 | int sysctl_secure_tcp; | |
911 | #ifdef CONFIG_IP_VS_NFCT | |
912 | int sysctl_conntrack; | |
913 | #endif | |
914 | int sysctl_snat_reroute; | |
915 | int sysctl_sync_ver; | |
f73181c8 | 916 | int sysctl_sync_ports; |
4d0c875d | 917 | int sysctl_sync_persist_mode; |
07995674 | 918 | unsigned long sysctl_sync_qlen_max; |
1c003b15 | 919 | int sysctl_sync_sock_size; |
2553d064 JA |
920 | int sysctl_cache_bypass; |
921 | int sysctl_expire_nodest_conn; | |
c6c96c18 AF |
922 | int sysctl_sloppy_tcp; |
923 | int sysctl_sloppy_sctp; | |
2553d064 JA |
924 | int sysctl_expire_quiescent_template; |
925 | int sysctl_sync_threshold[2]; | |
749c42b6 JA |
926 | unsigned int sysctl_sync_refresh_period; |
927 | int sysctl_sync_retries; | |
2553d064 | 928 | int sysctl_nat_icmp_send; |
3654e611 | 929 | int sysctl_pmtu_disc; |
0c12582f | 930 | int sysctl_backup_only; |
d752c364 | 931 | int sysctl_conn_reuse_mode; |
94485fed | 932 | int sysctl_schedule_icmp; |
4e478098 | 933 | int sysctl_ignore_tunneled; |
2553d064 JA |
934 | |
935 | /* ip_vs_lblc */ | |
936 | int sysctl_lblc_expiration; | |
937 | struct ctl_table_header *lblc_ctl_header; | |
938 | struct ctl_table *lblc_ctl_table; | |
939 | /* ip_vs_lblcr */ | |
940 | int sysctl_lblcr_expiration; | |
941 | struct ctl_table_header *lblcr_ctl_header; | |
942 | struct ctl_table *lblcr_ctl_table; | |
943 | /* ip_vs_est */ | |
944 | struct list_head est_list; /* estimator list */ | |
945 | spinlock_t est_lock; | |
946 | struct timer_list est_timer; /* Estimation timer */ | |
947 | /* ip_vs_sync */ | |
2553d064 | 948 | spinlock_t sync_lock; |
f73181c8 | 949 | struct ipvs_master_sync_state *ms; |
2553d064 | 950 | spinlock_t sync_buff_lock; |
8e739a47 JA |
951 | struct ip_vs_sync_thread_data *master_tinfo; |
952 | struct ip_vs_sync_thread_data *backup_tinfo; | |
f73181c8 | 953 | int threads_mask; |
2553d064 | 954 | volatile int sync_state; |
ae1d48b2 | 955 | struct mutex sync_mutex; |
e4ff6751 JA |
956 | struct ipvs_sync_daemon_cfg mcfg; /* Master Configuration */ |
957 | struct ipvs_sync_daemon_cfg bcfg; /* Backup Configuration */ | |
2553d064 JA |
958 | /* net name space ptr */ |
959 | struct net *net; /* Needed by timer routines */ | |
07dcc686 SH |
960 | /* Number of heterogeneous destinations, needed becaus heterogeneous |
961 | * are not supported when synchronization is enabled. | |
962 | */ | |
391f503d | 963 | unsigned int mixed_address_family_dests; |
2553d064 | 964 | }; |
1da177e4 | 965 | |
59e0350e SH |
966 | #define DEFAULT_SYNC_THRESHOLD 3 |
967 | #define DEFAULT_SYNC_PERIOD 50 | |
7532e8d4 | 968 | #define DEFAULT_SYNC_VER 1 |
c6c96c18 AF |
969 | #define DEFAULT_SLOPPY_TCP 0 |
970 | #define DEFAULT_SLOPPY_SCTP 0 | |
749c42b6 JA |
971 | #define DEFAULT_SYNC_REFRESH_PERIOD (0U * HZ) |
972 | #define DEFAULT_SYNC_RETRIES 0 | |
1c003b15 PNA |
973 | #define IPVS_SYNC_WAKEUP_RATE 8 |
974 | #define IPVS_SYNC_QLEN_MAX (IPVS_SYNC_WAKEUP_RATE * 4) | |
975 | #define IPVS_SYNC_SEND_DELAY (HZ / 50) | |
976 | #define IPVS_SYNC_CHECK_PERIOD HZ | |
749c42b6 | 977 | #define IPVS_SYNC_FLUSH_TIME (HZ * 2) |
f73181c8 | 978 | #define IPVS_SYNC_PORTS_MAX (1 << 6) |
59e0350e SH |
979 | |
980 | #ifdef CONFIG_SYSCTL | |
981 | ||
982 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
983 | { | |
984 | return ipvs->sysctl_sync_threshold[0]; | |
985 | } | |
986 | ||
987 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
988 | { | |
6aa7de05 | 989 | return READ_ONCE(ipvs->sysctl_sync_threshold[1]); |
749c42b6 JA |
990 | } |
991 | ||
992 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) | |
993 | { | |
6aa7de05 | 994 | return READ_ONCE(ipvs->sysctl_sync_refresh_period); |
749c42b6 JA |
995 | } |
996 | ||
997 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
998 | { | |
999 | return ipvs->sysctl_sync_retries; | |
59e0350e SH |
1000 | } |
1001 | ||
7532e8d4 SH |
1002 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1003 | { | |
1004 | return ipvs->sysctl_sync_ver; | |
1005 | } | |
1006 | ||
c6c96c18 AF |
1007 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1008 | { | |
1009 | return ipvs->sysctl_sloppy_tcp; | |
1010 | } | |
1011 | ||
1012 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1013 | { | |
1014 | return ipvs->sysctl_sloppy_sctp; | |
1015 | } | |
1016 | ||
f73181c8 PNA |
1017 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1018 | { | |
6aa7de05 | 1019 | return READ_ONCE(ipvs->sysctl_sync_ports); |
f73181c8 PNA |
1020 | } |
1021 | ||
4d0c875d JA |
1022 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1023 | { | |
1024 | return ipvs->sysctl_sync_persist_mode; | |
1025 | } | |
1026 | ||
07995674 | 1027 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1028 | { |
1029 | return ipvs->sysctl_sync_qlen_max; | |
1030 | } | |
1031 | ||
1032 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1033 | { | |
1034 | return ipvs->sysctl_sync_sock_size; | |
1035 | } | |
1036 | ||
3654e611 JA |
1037 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1038 | { | |
1039 | return ipvs->sysctl_pmtu_disc; | |
1040 | } | |
1041 | ||
0c12582f JA |
1042 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1043 | { | |
1044 | return ipvs->sync_state & IP_VS_STATE_BACKUP && | |
1045 | ipvs->sysctl_backup_only; | |
1046 | } | |
1047 | ||
d752c364 MRL |
1048 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1049 | { | |
1050 | return ipvs->sysctl_conn_reuse_mode; | |
1051 | } | |
1052 | ||
94485fed AG |
1053 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1054 | { | |
1055 | return ipvs->sysctl_schedule_icmp; | |
1056 | } | |
1057 | ||
4e478098 AG |
1058 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1059 | { | |
1060 | return ipvs->sysctl_ignore_tunneled; | |
1061 | } | |
1062 | ||
57032948 EB |
1063 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1064 | { | |
1065 | return ipvs->sysctl_cache_bypass; | |
1066 | } | |
1067 | ||
59e0350e SH |
1068 | #else |
1069 | ||
1070 | static inline int sysctl_sync_threshold(struct netns_ipvs *ipvs) | |
1071 | { | |
1072 | return DEFAULT_SYNC_THRESHOLD; | |
1073 | } | |
1074 | ||
1075 | static inline int sysctl_sync_period(struct netns_ipvs *ipvs) | |
1076 | { | |
1077 | return DEFAULT_SYNC_PERIOD; | |
1078 | } | |
1079 | ||
749c42b6 JA |
1080 | static inline unsigned int sysctl_sync_refresh_period(struct netns_ipvs *ipvs) |
1081 | { | |
1082 | return DEFAULT_SYNC_REFRESH_PERIOD; | |
1083 | } | |
1084 | ||
1085 | static inline int sysctl_sync_retries(struct netns_ipvs *ipvs) | |
1086 | { | |
1087 | return DEFAULT_SYNC_RETRIES & 3; | |
1088 | } | |
1089 | ||
7532e8d4 SH |
1090 | static inline int sysctl_sync_ver(struct netns_ipvs *ipvs) |
1091 | { | |
1092 | return DEFAULT_SYNC_VER; | |
1093 | } | |
1094 | ||
c6c96c18 AF |
1095 | static inline int sysctl_sloppy_tcp(struct netns_ipvs *ipvs) |
1096 | { | |
1097 | return DEFAULT_SLOPPY_TCP; | |
1098 | } | |
1099 | ||
1100 | static inline int sysctl_sloppy_sctp(struct netns_ipvs *ipvs) | |
1101 | { | |
1102 | return DEFAULT_SLOPPY_SCTP; | |
1103 | } | |
1104 | ||
f73181c8 PNA |
1105 | static inline int sysctl_sync_ports(struct netns_ipvs *ipvs) |
1106 | { | |
1107 | return 1; | |
1108 | } | |
1109 | ||
4d0c875d JA |
1110 | static inline int sysctl_sync_persist_mode(struct netns_ipvs *ipvs) |
1111 | { | |
1112 | return 0; | |
1113 | } | |
1114 | ||
07995674 | 1115 | static inline unsigned long sysctl_sync_qlen_max(struct netns_ipvs *ipvs) |
1c003b15 PNA |
1116 | { |
1117 | return IPVS_SYNC_QLEN_MAX; | |
1118 | } | |
1119 | ||
1120 | static inline int sysctl_sync_sock_size(struct netns_ipvs *ipvs) | |
1121 | { | |
1122 | return 0; | |
1123 | } | |
1124 | ||
3654e611 JA |
1125 | static inline int sysctl_pmtu_disc(struct netns_ipvs *ipvs) |
1126 | { | |
1127 | return 1; | |
1128 | } | |
1129 | ||
0c12582f JA |
1130 | static inline int sysctl_backup_only(struct netns_ipvs *ipvs) |
1131 | { | |
1132 | return 0; | |
1133 | } | |
1134 | ||
d752c364 MRL |
1135 | static inline int sysctl_conn_reuse_mode(struct netns_ipvs *ipvs) |
1136 | { | |
1137 | return 1; | |
1138 | } | |
1139 | ||
94485fed AG |
1140 | static inline int sysctl_schedule_icmp(struct netns_ipvs *ipvs) |
1141 | { | |
1142 | return 0; | |
1143 | } | |
1144 | ||
4e478098 AG |
1145 | static inline int sysctl_ignore_tunneled(struct netns_ipvs *ipvs) |
1146 | { | |
1147 | return 0; | |
1148 | } | |
1149 | ||
57032948 EB |
1150 | static inline int sysctl_cache_bypass(struct netns_ipvs *ipvs) |
1151 | { | |
1152 | return 0; | |
1153 | } | |
1154 | ||
59e0350e SH |
1155 | #endif |
1156 | ||
07dcc686 SH |
1157 | /* IPVS core functions |
1158 | * (from ip_vs_core.c) | |
1da177e4 | 1159 | */ |
5c3a0fd7 JP |
1160 | const char *ip_vs_proto_name(unsigned int proto); |
1161 | void ip_vs_init_hash_table(struct list_head *table, int rows); | |
39b97223 MA |
1162 | struct ip_vs_conn *ip_vs_new_conn_out(struct ip_vs_service *svc, |
1163 | struct ip_vs_dest *dest, | |
1164 | struct sk_buff *skb, | |
1165 | const struct ip_vs_iphdr *iph, | |
1166 | __be16 dport, | |
1167 | __be16 cport); | |
afdd6140 | 1168 | #define IP_VS_INIT_HASH_TABLE(t) ip_vs_init_hash_table((t), ARRAY_SIZE((t))) |
1da177e4 | 1169 | |
1da177e4 LT |
1170 | #define IP_VS_APP_TYPE_FTP 1 |
1171 | ||
07dcc686 SH |
1172 | /* ip_vs_conn handling functions |
1173 | * (from ip_vs_conn.c) | |
1da177e4 | 1174 | */ |
1da177e4 LT |
1175 | enum { |
1176 | IP_VS_DIR_INPUT = 0, | |
1177 | IP_VS_DIR_OUTPUT, | |
1178 | IP_VS_DIR_INPUT_ONLY, | |
1179 | IP_VS_DIR_LAST, | |
1180 | }; | |
1181 | ||
19913dec | 1182 | static inline void ip_vs_conn_fill_param(struct netns_ipvs *ipvs, int af, int protocol, |
f11017ec SH |
1183 | const union nf_inet_addr *caddr, |
1184 | __be16 cport, | |
1185 | const union nf_inet_addr *vaddr, | |
1186 | __be16 vport, | |
1187 | struct ip_vs_conn_param *p) | |
1188 | { | |
19913dec | 1189 | p->ipvs = ipvs; |
f11017ec SH |
1190 | p->af = af; |
1191 | p->protocol = protocol; | |
1192 | p->caddr = caddr; | |
1193 | p->cport = cport; | |
1194 | p->vaddr = vaddr; | |
1195 | p->vport = vport; | |
85999283 SH |
1196 | p->pe = NULL; |
1197 | p->pe_data = NULL; | |
f11017ec | 1198 | } |
28364a59 | 1199 | |
f11017ec SH |
1200 | struct ip_vs_conn *ip_vs_conn_in_get(const struct ip_vs_conn_param *p); |
1201 | struct ip_vs_conn *ip_vs_ct_in_get(const struct ip_vs_conn_param *p); | |
28364a59 | 1202 | |
ab161976 EB |
1203 | struct ip_vs_conn * ip_vs_conn_in_get_proto(struct netns_ipvs *ipvs, int af, |
1204 | const struct sk_buff *skb, | |
802c41ad | 1205 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1206 | |
f11017ec | 1207 | struct ip_vs_conn *ip_vs_conn_out_get(const struct ip_vs_conn_param *p); |
1da177e4 | 1208 | |
0cf705c8 EB |
1209 | struct ip_vs_conn * ip_vs_conn_out_get_proto(struct netns_ipvs *ipvs, int af, |
1210 | const struct sk_buff *skb, | |
802c41ad | 1211 | const struct ip_vs_iphdr *iph); |
5c0d2374 | 1212 | |
088339a5 JA |
1213 | /* Get reference to gain full access to conn. |
1214 | * By default, RCU read-side critical sections have access only to | |
1215 | * conn fields and its PE data, see ip_vs_conn_rcu_free() for reference. | |
1216 | */ | |
1217 | static inline bool __ip_vs_conn_get(struct ip_vs_conn *cp) | |
1218 | { | |
b54ab92b | 1219 | return refcount_inc_not_zero(&cp->refcnt); |
088339a5 JA |
1220 | } |
1221 | ||
1da177e4 LT |
1222 | /* put back the conn without restarting its timer */ |
1223 | static inline void __ip_vs_conn_put(struct ip_vs_conn *cp) | |
1224 | { | |
4e857c58 | 1225 | smp_mb__before_atomic(); |
b54ab92b | 1226 | refcount_dec(&cp->refcnt); |
1da177e4 | 1227 | } |
5c3a0fd7 JP |
1228 | void ip_vs_conn_put(struct ip_vs_conn *cp); |
1229 | void ip_vs_conn_fill_cport(struct ip_vs_conn *cp, __be16 cport); | |
1da177e4 | 1230 | |
ba38528a | 1231 | struct ip_vs_conn *ip_vs_conn_new(const struct ip_vs_conn_param *p, int dest_af, |
f11017ec | 1232 | const union nf_inet_addr *daddr, |
95c96174 | 1233 | __be16 dport, unsigned int flags, |
0e051e68 | 1234 | struct ip_vs_dest *dest, __u32 fwmark); |
5c3a0fd7 | 1235 | void ip_vs_conn_expire_now(struct ip_vs_conn *cp); |
1da177e4 | 1236 | |
5c3a0fd7 | 1237 | const char *ip_vs_state_name(__u16 proto, int state); |
1da177e4 | 1238 | |
69f39093 | 1239 | void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp); |
3ec10d3a | 1240 | int ip_vs_check_template(struct ip_vs_conn *ct, struct ip_vs_dest *cdest); |
423b5595 | 1241 | void ip_vs_random_dropentry(struct netns_ipvs *ipvs); |
5c3a0fd7 JP |
1242 | int ip_vs_conn_init(void); |
1243 | void ip_vs_conn_cleanup(void); | |
1da177e4 LT |
1244 | |
1245 | static inline void ip_vs_control_del(struct ip_vs_conn *cp) | |
1246 | { | |
1247 | struct ip_vs_conn *ctl_cp = cp->control; | |
1248 | if (!ctl_cp) { | |
cfc78c5a JV |
1249 | IP_VS_ERR_BUF("request control DEL for uncontrolled: " |
1250 | "%s:%d to %s:%d\n", | |
1251 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1252 | ntohs(cp->cport), | |
1253 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1254 | ntohs(cp->vport)); | |
1255 | ||
1da177e4 LT |
1256 | return; |
1257 | } | |
1258 | ||
cfc78c5a JV |
1259 | IP_VS_DBG_BUF(7, "DELeting control for: " |
1260 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1261 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1262 | ntohs(cp->cport), | |
1263 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1264 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1265 | |
1266 | cp->control = NULL; | |
1267 | if (atomic_read(&ctl_cp->n_control) == 0) { | |
cfc78c5a JV |
1268 | IP_VS_ERR_BUF("BUG control DEL with n=0 : " |
1269 | "%s:%d to %s:%d\n", | |
1270 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1271 | ntohs(cp->cport), | |
1272 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1273 | ntohs(cp->vport)); | |
1274 | ||
1da177e4 LT |
1275 | return; |
1276 | } | |
1277 | atomic_dec(&ctl_cp->n_control); | |
1278 | } | |
1279 | ||
1280 | static inline void | |
1281 | ip_vs_control_add(struct ip_vs_conn *cp, struct ip_vs_conn *ctl_cp) | |
1282 | { | |
1283 | if (cp->control) { | |
cfc78c5a JV |
1284 | IP_VS_ERR_BUF("request control ADD for already controlled: " |
1285 | "%s:%d to %s:%d\n", | |
1286 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1287 | ntohs(cp->cport), | |
1288 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), | |
1289 | ntohs(cp->vport)); | |
1290 | ||
1da177e4 LT |
1291 | ip_vs_control_del(cp); |
1292 | } | |
1293 | ||
cfc78c5a JV |
1294 | IP_VS_DBG_BUF(7, "ADDing control for: " |
1295 | "cp.dst=%s:%d ctl_cp.dst=%s:%d\n", | |
1296 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), | |
1297 | ntohs(cp->cport), | |
1298 | IP_VS_DBG_ADDR(cp->af, &ctl_cp->caddr), | |
1299 | ntohs(ctl_cp->cport)); | |
1da177e4 LT |
1300 | |
1301 | cp->control = ctl_cp; | |
1302 | atomic_inc(&ctl_cp->n_control); | |
1303 | } | |
1304 | ||
07dcc686 | 1305 | /* IPVS netns init & cleanup functions */ |
a4dd0360 | 1306 | int ip_vs_estimator_net_init(struct netns_ipvs *ipvs); |
3d993766 | 1307 | int ip_vs_control_net_init(struct netns_ipvs *ipvs); |
7d1f88ec | 1308 | int ip_vs_protocol_net_init(struct netns_ipvs *ipvs); |
b5dd212c | 1309 | int ip_vs_app_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1310 | int ip_vs_conn_net_init(struct netns_ipvs *ipvs); |
802cb437 | 1311 | int ip_vs_sync_net_init(struct netns_ipvs *ipvs); |
2f3edc6a | 1312 | void ip_vs_conn_net_cleanup(struct netns_ipvs *ipvs); |
b5dd212c | 1313 | void ip_vs_app_net_cleanup(struct netns_ipvs *ipvs); |
7d1f88ec | 1314 | void ip_vs_protocol_net_cleanup(struct netns_ipvs *ipvs); |
3d993766 | 1315 | void ip_vs_control_net_cleanup(struct netns_ipvs *ipvs); |
a4dd0360 | 1316 | void ip_vs_estimator_net_cleanup(struct netns_ipvs *ipvs); |
ebea1f7c | 1317 | void ip_vs_sync_net_cleanup(struct netns_ipvs *ipvs); |
56d2169b | 1318 | void ip_vs_service_net_cleanup(struct netns_ipvs *ipvs); |
1da177e4 | 1319 | |
07dcc686 SH |
1320 | /* IPVS application functions |
1321 | * (from ip_vs_app.c) | |
1da177e4 LT |
1322 | */ |
1323 | #define IP_VS_APP_MAX_PORTS 8 | |
9f8128a5 EB |
1324 | struct ip_vs_app *register_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); |
1325 | void unregister_ip_vs_app(struct netns_ipvs *ipvs, struct ip_vs_app *app); | |
5c3a0fd7 JP |
1326 | int ip_vs_bind_app(struct ip_vs_conn *cp, struct ip_vs_protocol *pp); |
1327 | void ip_vs_unbind_app(struct ip_vs_conn *cp); | |
3250dc9c | 1328 | int register_ip_vs_app_inc(struct netns_ipvs *ipvs, struct ip_vs_app *app, __u16 proto, |
5c3a0fd7 JP |
1329 | __u16 port); |
1330 | int ip_vs_app_inc_get(struct ip_vs_app *inc); | |
1331 | void ip_vs_app_inc_put(struct ip_vs_app *inc); | |
1332 | ||
1333 | int ip_vs_app_pkt_out(struct ip_vs_conn *, struct sk_buff *skb); | |
1334 | int ip_vs_app_pkt_in(struct ip_vs_conn *, struct sk_buff *skb); | |
1da177e4 | 1335 | |
8be67a66 SH |
1336 | int register_ip_vs_pe(struct ip_vs_pe *pe); |
1337 | int unregister_ip_vs_pe(struct ip_vs_pe *pe); | |
e9e5eee8 | 1338 | struct ip_vs_pe *ip_vs_pe_getbyname(const char *name); |
fe5e7a1e | 1339 | struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name); |
e9e5eee8 | 1340 | |
07dcc686 | 1341 | /* Use a #define to avoid all of module.h just for these trivial ops */ |
69e7dae4 PG |
1342 | #define ip_vs_pe_get(pe) \ |
1343 | if (pe && pe->module) \ | |
e9e5eee8 | 1344 | __module_get(pe->module); |
e9e5eee8 | 1345 | |
69e7dae4 PG |
1346 | #define ip_vs_pe_put(pe) \ |
1347 | if (pe && pe->module) \ | |
e9e5eee8 | 1348 | module_put(pe->module); |
1da177e4 | 1349 | |
07dcc686 | 1350 | /* IPVS protocol functions (from ip_vs_proto.c) */ |
5c3a0fd7 JP |
1351 | int ip_vs_protocol_init(void); |
1352 | void ip_vs_protocol_cleanup(void); | |
1353 | void ip_vs_protocol_timeout_change(struct netns_ipvs *ipvs, int flags); | |
1354 | int *ip_vs_create_timeout_table(int *table, int size); | |
5c3a0fd7 JP |
1355 | void ip_vs_tcpudp_debug_packet(int af, struct ip_vs_protocol *pp, |
1356 | const struct sk_buff *skb, int offset, | |
1357 | const char *msg); | |
1da177e4 LT |
1358 | |
1359 | extern struct ip_vs_protocol ip_vs_protocol_tcp; | |
1360 | extern struct ip_vs_protocol ip_vs_protocol_udp; | |
1361 | extern struct ip_vs_protocol ip_vs_protocol_icmp; | |
1362 | extern struct ip_vs_protocol ip_vs_protocol_esp; | |
1363 | extern struct ip_vs_protocol ip_vs_protocol_ah; | |
2906f66a | 1364 | extern struct ip_vs_protocol ip_vs_protocol_sctp; |
1da177e4 | 1365 | |
07dcc686 SH |
1366 | /* Registering/unregistering scheduler functions |
1367 | * (from ip_vs_sched.c) | |
1da177e4 | 1368 | */ |
5c3a0fd7 JP |
1369 | int register_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); |
1370 | int unregister_ip_vs_scheduler(struct ip_vs_scheduler *scheduler); | |
1371 | int ip_vs_bind_scheduler(struct ip_vs_service *svc, | |
1372 | struct ip_vs_scheduler *scheduler); | |
1373 | void ip_vs_unbind_scheduler(struct ip_vs_service *svc, | |
1374 | struct ip_vs_scheduler *sched); | |
1375 | struct ip_vs_scheduler *ip_vs_scheduler_get(const char *sched_name); | |
1376 | void ip_vs_scheduler_put(struct ip_vs_scheduler *scheduler); | |
1377 | struct ip_vs_conn * | |
190ecd27 | 1378 | ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, |
d4383f04 JDB |
1379 | struct ip_vs_proto_data *pd, int *ignored, |
1380 | struct ip_vs_iphdr *iph); | |
5c3a0fd7 JP |
1381 | int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, |
1382 | struct ip_vs_proto_data *pd, struct ip_vs_iphdr *iph); | |
1da177e4 | 1383 | |
5c3a0fd7 | 1384 | void ip_vs_scheduler_err(struct ip_vs_service *svc, const char *msg); |
41ac51ee | 1385 | |
07dcc686 | 1386 | /* IPVS control data and functions (from ip_vs_ctl.c) */ |
1da177e4 | 1387 | extern struct ip_vs_stats ip_vs_stats; |
b880c1f0 | 1388 | extern int sysctl_ip_vs_sync_ver; |
1da177e4 | 1389 | |
5c3a0fd7 | 1390 | struct ip_vs_service * |
0a4fd6ce | 1391 | ip_vs_service_find(struct netns_ipvs *ipvs, int af, __u32 fwmark, __u16 protocol, |
3c2e0505 | 1392 | const union nf_inet_addr *vaddr, __be16 vport); |
1da177e4 | 1393 | |
48aed1b0 | 1394 | bool ip_vs_has_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, |
5c3a0fd7 JP |
1395 | const union nf_inet_addr *daddr, __be16 dport); |
1396 | ||
39b97223 MA |
1397 | struct ip_vs_dest * |
1398 | ip_vs_find_real_service(struct netns_ipvs *ipvs, int af, __u16 protocol, | |
1399 | const union nf_inet_addr *daddr, __be16 dport); | |
1400 | ||
5c3a0fd7 JP |
1401 | int ip_vs_use_count_inc(void); |
1402 | void ip_vs_use_count_dec(void); | |
1403 | int ip_vs_register_nl_ioctl(void); | |
1404 | void ip_vs_unregister_nl_ioctl(void); | |
1405 | int ip_vs_control_init(void); | |
1406 | void ip_vs_control_cleanup(void); | |
1407 | struct ip_vs_dest * | |
dc2add6f | 1408 | ip_vs_find_dest(struct netns_ipvs *ipvs, int svc_af, int dest_af, |
655eef10 AG |
1409 | const union nf_inet_addr *daddr, __be16 dport, |
1410 | const union nf_inet_addr *vaddr, __be16 vport, | |
52793dbe | 1411 | __u16 protocol, __u32 fwmark, __u32 flags); |
5c3a0fd7 | 1412 | void ip_vs_try_bind_dest(struct ip_vs_conn *cp); |
1da177e4 | 1413 | |
fca9c20a JA |
1414 | static inline void ip_vs_dest_hold(struct ip_vs_dest *dest) |
1415 | { | |
b54ab92b | 1416 | refcount_inc(&dest->refcnt); |
fca9c20a JA |
1417 | } |
1418 | ||
1419 | static inline void ip_vs_dest_put(struct ip_vs_dest *dest) | |
1420 | { | |
4e857c58 | 1421 | smp_mb__before_atomic(); |
b54ab92b | 1422 | refcount_dec(&dest->refcnt); |
fca9c20a | 1423 | } |
1da177e4 | 1424 | |
9e4e948a JA |
1425 | static inline void ip_vs_dest_put_and_free(struct ip_vs_dest *dest) |
1426 | { | |
b54ab92b | 1427 | if (refcount_dec_and_test(&dest->refcnt)) |
9e4e948a JA |
1428 | kfree(dest); |
1429 | } | |
1430 | ||
07dcc686 SH |
1431 | /* IPVS sync daemon data and function prototypes |
1432 | * (from ip_vs_sync.c) | |
1da177e4 | 1433 | */ |
6ac121d7 | 1434 | int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *cfg, |
e4ff6751 | 1435 | int state); |
b3cf3cbf | 1436 | int stop_sync_thread(struct netns_ipvs *ipvs, int state); |
b61a8c1a | 1437 | void ip_vs_sync_conn(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, int pkts); |
1da177e4 | 1438 | |
07dcc686 | 1439 | /* IPVS rate estimator prototypes (from ip_vs_est.c) */ |
0f34d54b EB |
1440 | void ip_vs_start_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); |
1441 | void ip_vs_stop_estimator(struct netns_ipvs *ipvs, struct ip_vs_stats *stats); | |
5c3a0fd7 | 1442 | void ip_vs_zero_estimator(struct ip_vs_stats *stats); |
cd67cd5e | 1443 | void ip_vs_read_estimator(struct ip_vs_kstats *dst, struct ip_vs_stats *stats); |
1da177e4 | 1444 | |
07dcc686 | 1445 | /* Various IPVS packet transmitters (from ip_vs_xmit.c) */ |
5c3a0fd7 JP |
1446 | int ip_vs_null_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, |
1447 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1448 | int ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1449 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1450 | int ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1451 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1452 | int ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1453 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1454 | int ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1455 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1456 | int ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1457 | struct ip_vs_protocol *pp, int offset, | |
1458 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
1459 | void ip_vs_dest_dst_rcu_free(struct rcu_head *head); | |
1da177e4 | 1460 | |
b3cdd2a7 | 1461 | #ifdef CONFIG_IP_VS_IPV6 |
5c3a0fd7 JP |
1462 | int ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, |
1463 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1464 | int ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1465 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1466 | int ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1467 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1468 | int ip_vs_dr_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1469 | struct ip_vs_protocol *pp, struct ip_vs_iphdr *iph); | |
1470 | int ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, | |
1471 | struct ip_vs_protocol *pp, int offset, | |
1472 | unsigned int hooknum, struct ip_vs_iphdr *iph); | |
b3cdd2a7 | 1473 | #endif |
1da177e4 | 1474 | |
3a1bbf18 | 1475 | #ifdef CONFIG_SYSCTL |
07dcc686 SH |
1476 | /* This is a simple mechanism to ignore packets when |
1477 | * we are loaded. Just set ip_vs_drop_rate to 'n' and | |
1478 | * we start to drop 1/rate of the packets | |
1da177e4 | 1479 | */ |
a0840e2e | 1480 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) |
1da177e4 | 1481 | { |
a0840e2e HS |
1482 | if (!ipvs->drop_rate) |
1483 | return 0; | |
1484 | if (--ipvs->drop_counter > 0) | |
1485 | return 0; | |
1486 | ipvs->drop_counter = ipvs->drop_rate; | |
1da177e4 LT |
1487 | return 1; |
1488 | } | |
3a1bbf18 SH |
1489 | #else |
1490 | static inline int ip_vs_todrop(struct netns_ipvs *ipvs) { return 0; } | |
1491 | #endif | |
1da177e4 | 1492 | |
07dcc686 | 1493 | /* ip_vs_fwd_tag returns the forwarding tag of the connection */ |
1da177e4 LT |
1494 | #define IP_VS_FWD_METHOD(cp) (cp->flags & IP_VS_CONN_F_FWD_MASK) |
1495 | ||
732db659 | 1496 | static inline char ip_vs_fwd_tag(struct ip_vs_conn *cp) |
1da177e4 LT |
1497 | { |
1498 | char fwd; | |
1499 | ||
1500 | switch (IP_VS_FWD_METHOD(cp)) { | |
1501 | case IP_VS_CONN_F_MASQ: | |
1502 | fwd = 'M'; break; | |
1503 | case IP_VS_CONN_F_LOCALNODE: | |
1504 | fwd = 'L'; break; | |
1505 | case IP_VS_CONN_F_TUNNEL: | |
1506 | fwd = 'T'; break; | |
1507 | case IP_VS_CONN_F_DROUTE: | |
1508 | fwd = 'R'; break; | |
1509 | case IP_VS_CONN_F_BYPASS: | |
1510 | fwd = 'B'; break; | |
1511 | default: | |
1512 | fwd = '?'; break; | |
1513 | } | |
1514 | return fwd; | |
1515 | } | |
1516 | ||
5c3a0fd7 JP |
1517 | void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1518 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 JV |
1519 | |
1520 | #ifdef CONFIG_IP_VS_IPV6 | |
5c3a0fd7 JP |
1521 | void ip_vs_nat_icmp_v6(struct sk_buff *skb, struct ip_vs_protocol *pp, |
1522 | struct ip_vs_conn *cp, int dir); | |
b3cdd2a7 | 1523 | #endif |
1da177e4 | 1524 | |
5c3a0fd7 | 1525 | __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); |
1da177e4 | 1526 | |
f9214b26 | 1527 | static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) |
1da177e4 | 1528 | { |
f9214b26 | 1529 | __be32 diff[2] = { ~old, new }; |
1da177e4 | 1530 | |
07f0757a | 1531 | return csum_partial(diff, sizeof(diff), oldsum); |
f9214b26 AV |
1532 | } |
1533 | ||
0bbdd42b JV |
1534 | #ifdef CONFIG_IP_VS_IPV6 |
1535 | static inline __wsum ip_vs_check_diff16(const __be32 *old, const __be32 *new, | |
1536 | __wsum oldsum) | |
1537 | { | |
1538 | __be32 diff[8] = { ~old[3], ~old[2], ~old[1], ~old[0], | |
1539 | new[3], new[2], new[1], new[0] }; | |
1540 | ||
07f0757a | 1541 | return csum_partial(diff, sizeof(diff), oldsum); |
0bbdd42b JV |
1542 | } |
1543 | #endif | |
1544 | ||
f9214b26 AV |
1545 | static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) |
1546 | { | |
1547 | __be16 diff[2] = { ~old, new }; | |
1548 | ||
07f0757a | 1549 | return csum_partial(diff, sizeof(diff), oldsum); |
1da177e4 LT |
1550 | } |
1551 | ||
07dcc686 | 1552 | /* Forget current conntrack (unconfirmed) and attach notrack entry */ |
cf356d69 JA |
1553 | static inline void ip_vs_notrack(struct sk_buff *skb) |
1554 | { | |
1555 | #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) | |
1556 | enum ip_conntrack_info ctinfo; | |
06b69390 | 1557 | struct nf_conn *ct = nf_ct_get(skb, &ctinfo); |
cf356d69 | 1558 | |
ab8bc7ed | 1559 | if (ct) { |
97a6ad13 | 1560 | nf_conntrack_put(&ct->ct_general); |
cc41c84b | 1561 | nf_ct_set(skb, NULL, IP_CT_UNTRACKED); |
cf356d69 JA |
1562 | } |
1563 | #endif | |
1564 | } | |
1565 | ||
f4bc17cd | 1566 | #ifdef CONFIG_IP_VS_NFCT |
07dcc686 SH |
1567 | /* Netfilter connection tracking |
1568 | * (from ip_vs_nfct.c) | |
f4bc17cd | 1569 | */ |
a0840e2e | 1570 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd | 1571 | { |
a4e2f5a7 | 1572 | #ifdef CONFIG_SYSCTL |
a0840e2e | 1573 | return ipvs->sysctl_conntrack; |
a4e2f5a7 SH |
1574 | #else |
1575 | return 0; | |
1576 | #endif | |
f4bc17cd JA |
1577 | } |
1578 | ||
5c3a0fd7 JP |
1579 | void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp, |
1580 | int outin); | |
1581 | int ip_vs_confirm_conntrack(struct sk_buff *skb); | |
1582 | void ip_vs_nfct_expect_related(struct sk_buff *skb, struct nf_conn *ct, | |
1583 | struct ip_vs_conn *cp, u_int8_t proto, | |
1584 | const __be16 port, int from_rs); | |
1585 | void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp); | |
f4bc17cd JA |
1586 | |
1587 | #else | |
1588 | ||
a0840e2e | 1589 | static inline int ip_vs_conntrack_enabled(struct netns_ipvs *ipvs) |
f4bc17cd JA |
1590 | { |
1591 | return 0; | |
1592 | } | |
1593 | ||
1594 | static inline void ip_vs_update_conntrack(struct sk_buff *skb, | |
1595 | struct ip_vs_conn *cp, int outin) | |
1596 | { | |
1597 | } | |
1598 | ||
e23ebf0f | 1599 | static inline int ip_vs_confirm_conntrack(struct sk_buff *skb) |
f4bc17cd JA |
1600 | { |
1601 | return NF_ACCEPT; | |
1602 | } | |
1603 | ||
1604 | static inline void ip_vs_conn_drop_conntrack(struct ip_vs_conn *cp) | |
1605 | { | |
1606 | } | |
07dcc686 | 1607 | #endif /* CONFIG_IP_VS_NFCT */ |
6523ce15 | 1608 | |
f719e375 JA |
1609 | /* Really using conntrack? */ |
1610 | static inline bool ip_vs_conn_uses_conntrack(struct ip_vs_conn *cp, | |
1611 | struct sk_buff *skb) | |
1612 | { | |
1613 | #ifdef CONFIG_IP_VS_NFCT | |
1614 | enum ip_conntrack_info ctinfo; | |
1615 | struct nf_conn *ct; | |
1616 | ||
1617 | if (!(cp->flags & IP_VS_CONN_F_NFCT)) | |
1618 | return false; | |
1619 | ct = nf_ct_get(skb, &ctinfo); | |
ab8bc7ed | 1620 | if (ct) |
f719e375 JA |
1621 | return true; |
1622 | #endif | |
1623 | return false; | |
1624 | } | |
1625 | ||
c16526a7 | 1626 | static inline int |
b552f7e3 CG |
1627 | ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) |
1628 | { | |
07dcc686 | 1629 | /* We think the overhead of processing active connections is 256 |
b552f7e3 CG |
1630 | * times higher than that of inactive connections in average. (This |
1631 | * 256 times might not be accurate, we will change it later) We | |
1632 | * use the following formula to estimate the overhead now: | |
1633 | * dest->activeconns*256 + dest->inactconns | |
1634 | */ | |
1635 | return (atomic_read(&dest->activeconns) << 8) + | |
1636 | atomic_read(&dest->inactconns); | |
1637 | } | |
1638 | ||
bc4768eb | 1639 | #endif /* _NET_IP_VS_H */ |